drivers/scsi/hpsa.c

   1 /*
   2  *    Disk Array driver for HP Smart Array SAS controllers
   3  *    Copyright 2016 Microsemi Corporation
   4  *    Copyright 2014-2015 PMC-Sierra, Inc.
   5  *    Copyright 2000,2009-2015 Hewlett-Packard Development Company, L.P.
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; version 2 of the License.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  14  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  15  *
  16  *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/types.h>
  23 #include <linux/pci.h>
  24 #include <linux/pci-aspm.h>
  25 #include <linux/kernel.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/fs.h>
  29 #include <linux/timer.h>
  30 #include <linux/init.h>
  31 #include <linux/spinlock.h>
  32 #include <linux/compat.h>
  33 #include <linux/blktrace_api.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/io.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/completion.h>
  38 #include <linux/moduleparam.h>
  39 #include <scsi/scsi.h>
  40 #include <scsi/scsi_cmnd.h>
  41 #include <scsi/scsi_device.h>
  42 #include <scsi/scsi_host.h>
  43 #include <scsi/scsi_tcq.h>
  44 #include <scsi/scsi_eh.h>
  45 #include <scsi/scsi_transport_sas.h>
  46 #include <scsi/scsi_dbg.h>
  47 #include <linux/cciss_ioctl.h>
  48 #include <linux/string.h>
  49 #include <linux/bitmap.h>
  50 #include <linux/atomic.h>
  51 #include <linux/jiffies.h>
  52 #include <linux/percpu-defs.h>
  53 #include <linux/percpu.h>
  54 #include <asm/unaligned.h>
  55 #include <asm/div64.h>
  56 #include "hpsa_cmd.h"
  57 #include "hpsa.h"
  58
  59 /*
  60  * HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.'
  61  * with an optional trailing '-' followed by a byte value (0-255).
  62  */
  63 #define HPSA_DRIVER_VERSION "3.4.16-0"
  64 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  65 #define HPSA "hpsa"
  66
  67 /* How long to wait for CISS doorbell communication */
  68 #define CLEAR_EVENT_WAIT_INTERVAL 20    /* ms for each msleep() call */
  69 #define MODE_CHANGE_WAIT_INTERVAL 10    /* ms for each msleep() call */
  70 #define MAX_CLEAR_EVENT_WAIT 30000      /* times 20 ms = 600 s */
  71 #define MAX_MODE_CHANGE_WAIT 2000       /* times 10 ms = 20 s */
  72 #define MAX_IOCTL_CONFIG_WAIT 1000
  73
  74 /*define how many times we will try a command because of bus resets */
  75 #define MAX_CMD_RETRIES 3
  76
  77 /* Embedded module documentation macros - see modules.h */
  78 MODULE_AUTHOR("Hewlett-Packard Company");
  79 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  80         HPSA_DRIVER_VERSION);
  81 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
  82 MODULE_VERSION(HPSA_DRIVER_VERSION);
  83 MODULE_LICENSE("GPL");
  84
  85 static int hpsa_allow_any;
  86 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
  87 MODULE_PARM_DESC(hpsa_allow_any,
  88                 "Allow hpsa driver to access unknown HP Smart Array hardware");
  89 static int hpsa_simple_mode;
  90 module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
  91 MODULE_PARM_DESC(hpsa_simple_mode,
  92         "Use 'simple mode' rather than 'performant mode'");
  93
  94 /* define the PCI info for the cards we can control */
  95 static const struct pci_device_id hpsa_pci_device_id[] = {
  96         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  97         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  98         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  99         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
 100         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
 101         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324A},
 102         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324B},
 103         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
 104         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
 105         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
 106         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
 107         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
 108         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
 109         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
 110         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
 111         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
 112         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
 113         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
 114         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
 115         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
 116         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
 117         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1929},
 118         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BD},
 119         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BE},
 120         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BF},
 121         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C0},
 122         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C1},
 123         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C2},
 124         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C3},
 125         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C4},
 126         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C5},
 127         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C6},
 128         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C7},
 129         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C8},
 130         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C9},
 131         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CA},
 132         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CB},
 133         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CC},
 134         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CD},
 135         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CE},
 136         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0580},
 137         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0581},
 138         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0582},
 139         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0583},
 140         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0584},
 141         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0585},
 142         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0076},
 143         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0087},
 144         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x007D},
 145         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0088},
 146         {PCI_VENDOR_ID_HP, 0x333f, 0x103c, 0x333f},
 147         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
 148                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 149         {0,}
 150 };
 151
 152 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
 153
 154 /*  board_id = Subsystem Device ID & Vendor ID
 155  *  product = Marketing Name for the board
 156  *  access = Address of the struct of function pointers
 157  */
 158 static struct board_type products[] = {
 159         {0x3241103C, "Smart Array P212", &SA5_access},
 160         {0x3243103C, "Smart Array P410", &SA5_access},
 161         {0x3245103C, "Smart Array P410i", &SA5_access},
 162         {0x3247103C, "Smart Array P411", &SA5_access},
 163         {0x3249103C, "Smart Array P812", &SA5_access},
 164         {0x324A103C, "Smart Array P712m", &SA5_access},
 165         {0x324B103C, "Smart Array P711m", &SA5_access},
 166         {0x3233103C, "HP StorageWorks 1210m", &SA5_access}, /* alias of 333f */
 167         {0x3350103C, "Smart Array P222", &SA5_access},
 168         {0x3351103C, "Smart Array P420", &SA5_access},
 169         {0x3352103C, "Smart Array P421", &SA5_access},
 170         {0x3353103C, "Smart Array P822", &SA5_access},
 171         {0x3354103C, "Smart Array P420i", &SA5_access},
 172         {0x3355103C, "Smart Array P220i", &SA5_access},
 173         {0x3356103C, "Smart Array P721m", &SA5_access},
 174         {0x1921103C, "Smart Array P830i", &SA5_access},
 175         {0x1922103C, "Smart Array P430", &SA5_access},
 176         {0x1923103C, "Smart Array P431", &SA5_access},
 177         {0x1924103C, "Smart Array P830", &SA5_access},
 178         {0x1926103C, "Smart Array P731m", &SA5_access},
 179         {0x1928103C, "Smart Array P230i", &SA5_access},
 180         {0x1929103C, "Smart Array P530", &SA5_access},
 181         {0x21BD103C, "Smart Array P244br", &SA5_access},
 182         {0x21BE103C, "Smart Array P741m", &SA5_access},
 183         {0x21BF103C, "Smart HBA H240ar", &SA5_access},
 184         {0x21C0103C, "Smart Array P440ar", &SA5_access},
 185         {0x21C1103C, "Smart Array P840ar", &SA5_access},
 186         {0x21C2103C, "Smart Array P440", &SA5_access},
 187         {0x21C3103C, "Smart Array P441", &SA5_access},
 188         {0x21C4103C, "Smart Array", &SA5_access},
 189         {0x21C5103C, "Smart Array P841", &SA5_access},
 190         {0x21C6103C, "Smart HBA H244br", &SA5_access},
 191         {0x21C7103C, "Smart HBA H240", &SA5_access},
 192         {0x21C8103C, "Smart HBA H241", &SA5_access},
 193         {0x21C9103C, "Smart Array", &SA5_access},
 194         {0x21CA103C, "Smart Array P246br", &SA5_access},
 195         {0x21CB103C, "Smart Array P840", &SA5_access},
 196         {0x21CC103C, "Smart Array", &SA5_access},
 197         {0x21CD103C, "Smart Array", &SA5_access},
 198         {0x21CE103C, "Smart HBA", &SA5_access},
 199         {0x05809005, "SmartHBA-SA", &SA5_access},
 200         {0x05819005, "SmartHBA-SA 8i", &SA5_access},
 201         {0x05829005, "SmartHBA-SA 8i8e", &SA5_access},
 202         {0x05839005, "SmartHBA-SA 8e", &SA5_access},
 203         {0x05849005, "SmartHBA-SA 16i", &SA5_access},
 204         {0x05859005, "SmartHBA-SA 4i4e", &SA5_access},
 205         {0x00761590, "HP Storage P1224 Array Controller", &SA5_access},
 206         {0x00871590, "HP Storage P1224e Array Controller", &SA5_access},
 207         {0x007D1590, "HP Storage P1228 Array Controller", &SA5_access},
 208         {0x00881590, "HP Storage P1228e Array Controller", &SA5_access},
 209         {0x333f103c, "HP StorageWorks 1210m Array Controller", &SA5_access},
 210         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 211 };
 212
 213 static struct scsi_transport_template *hpsa_sas_transport_template;
 214 static int hpsa_add_sas_host(struct ctlr_info *h);
 215 static void hpsa_delete_sas_host(struct ctlr_info *h);
 216 static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
 217                         struct hpsa_scsi_dev_t *device);
 218 static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device);
 219 static struct hpsa_scsi_dev_t
 220         *hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
 221                 struct sas_rphy *rphy);
 222
 223 #define SCSI_CMD_BUSY ((struct scsi_cmnd *)&hpsa_cmd_busy)
 224 static const struct scsi_cmnd hpsa_cmd_busy;
 225 #define SCSI_CMD_IDLE ((struct scsi_cmnd *)&hpsa_cmd_idle)
 226 static const struct scsi_cmnd hpsa_cmd_idle;
 227 static int number_of_controllers;
 228
 229 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
 230 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
 231 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
 232
 233 #ifdef CONFIG_COMPAT
 234 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd,
 235         void __user *arg);
 236 #endif
 237
 238 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 239 static struct CommandList *cmd_alloc(struct ctlr_info *h);
 240 static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c);
 241 static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
 242                                             struct scsi_cmnd *scmd);
 243 static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 244         void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
 245         int cmd_type);
 246 static void hpsa_free_cmd_pool(struct ctlr_info *h);
 247 #define VPD_PAGE (1 << 8)
 248 #define HPSA_SIMPLE_ERROR_BITS 0x03
 249
 250 static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 251 static void hpsa_scan_start(struct Scsi_Host *);
 252 static int hpsa_scan_finished(struct Scsi_Host *sh,
 253         unsigned long elapsed_time);
 254 static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth);
 255
 256 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 257 static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
 258 static int hpsa_slave_alloc(struct scsi_device *sdev);
 259 static int hpsa_slave_configure(struct scsi_device *sdev);
 260 static void hpsa_slave_destroy(struct scsi_device *sdev);
 261
 262 static void hpsa_update_scsi_devices(struct ctlr_info *h);
 263 static int check_for_unit_attention(struct ctlr_info *h,
 264         struct CommandList *c);
 265 static void check_ioctl_unit_attention(struct ctlr_info *h,
 266         struct CommandList *c);
 267 /* performant mode helper functions */
 268 static void calc_bucket_map(int *bucket, int num_buckets,
 269         int nsgs, int min_blocks, u32 *bucket_map);
 270 static void hpsa_free_performant_mode(struct ctlr_info *h);
 271 static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 272 static inline u32 next_command(struct ctlr_info *h, u8 q);
 273 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
 274                                u32 *cfg_base_addr, u64 *cfg_base_addr_index,
 275                                u64 *cfg_offset);
 276 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
 277                                     unsigned long *memory_bar);
 278 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
 279 static int wait_for_device_to_become_ready(struct ctlr_info *h,
 280                                            unsigned char lunaddr[],
 281                                            int reply_queue);
 282 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
 283                                      int wait_for_ready);
 284 static inline void finish_cmd(struct CommandList *c);
 285 static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h);
 286 #define BOARD_NOT_READY 0
 287 #define BOARD_READY 1
 288 static void hpsa_drain_accel_commands(struct ctlr_info *h);
 289 static void hpsa_flush_cache(struct ctlr_info *h);
 290 static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
 291         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
 292         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk);
 293 static void hpsa_command_resubmit_worker(struct work_struct *work);
 294 static u32 lockup_detected(struct ctlr_info *h);
 295 static int detect_controller_lockup(struct ctlr_info *h);
 296 static void hpsa_disable_rld_caching(struct ctlr_info *h);
 297 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
 298         struct ReportExtendedLUNdata *buf, int bufsize);
 299 static bool hpsa_vpd_page_supported(struct ctlr_info *h,
 300         unsigned char scsi3addr[], u8 page);
 301 static int hpsa_luns_changed(struct ctlr_info *h);
 302 static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
 303                                struct hpsa_scsi_dev_t *dev,
 304                                unsigned char *scsi3addr);
 305
 306 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 307 {
 308         unsigned long *priv = shost_priv(sdev->host);
 309         return (struct ctlr_info *) *priv;
 310 }
 311
 312 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 313 {
 314         unsigned long *priv = shost_priv(sh);
 315         return (struct ctlr_info *) *priv;
 316 }
 317
 318 static inline bool hpsa_is_cmd_idle(struct CommandList *c)
 319 {
 320         return c->scsi_cmd == SCSI_CMD_IDLE;
 321 }
 322
 323 static inline bool hpsa_is_pending_event(struct CommandList *c)
 324 {
 325         return c->abort_pending || c->reset_pending;
 326 }
 327
 328 /* extract sense key, asc, and ascq from sense data.  -1 means invalid. */
 329 static void decode_sense_data(const u8 *sense_data, int sense_data_len,
 330                         u8 *sense_key, u8 *asc, u8 *ascq)
 331 {
 332         struct scsi_sense_hdr sshdr;
 333         bool rc;
 334
 335         *sense_key = -1;
 336         *asc = -1;
 337         *ascq = -1;
 338
 339         if (sense_data_len < 1)
 340                 return;
 341
 342         rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
 343         if (rc) {
 344                 *sense_key = sshdr.sense_key;
 345                 *asc = sshdr.asc;
 346                 *ascq = sshdr.ascq;
 347         }
 348 }
 349
 350 static int check_for_unit_attention(struct ctlr_info *h,
 351         struct CommandList *c)
 352 {
 353         u8 sense_key, asc, ascq;
 354         int sense_len;
 355
 356         if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
 357                 sense_len = sizeof(c->err_info->SenseInfo);
 358         else
 359                 sense_len = c->err_info->SenseLen;
 360
 361         decode_sense_data(c->err_info->SenseInfo, sense_len,
 362                                 &sense_key, &asc, &ascq);
 363         if (sense_key != UNIT_ATTENTION || asc == 0xff)
 364                 return 0;
 365
 366         switch (asc) {
 367         case STATE_CHANGED:
 368                 dev_warn(&h->pdev->dev,
 369                         "%s: a state change detected, command retried\n",
 370                         h->devname);
 371                 break;
 372         case LUN_FAILED:
 373                 dev_warn(&h->pdev->dev,
 374                         "%s: LUN failure detected\n", h->devname);
 375                 break;
 376         case REPORT_LUNS_CHANGED:
 377                 dev_warn(&h->pdev->dev,
 378                         "%s: report LUN data changed\n", h->devname);
 379         /*
 380          * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
 381          * target (array) devices.
 382          */
 383                 break;
 384         case POWER_OR_RESET:
 385                 dev_warn(&h->pdev->dev,
 386                         "%s: a power on or device reset detected\n",
 387                         h->devname);
 388                 break;
 389         case UNIT_ATTENTION_CLEARED:
 390                 dev_warn(&h->pdev->dev,
 391                         "%s: unit attention cleared by another initiator\n",
 392                         h->devname);
 393                 break;
 394         default:
 395                 dev_warn(&h->pdev->dev,
 396                         "%s: unknown unit attention detected\n",
 397                         h->devname);
 398                 break;
 399         }
 400         return 1;
 401 }
 402
 403 static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
 404 {
 405         if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
 406                 (c->err_info->ScsiStatus != SAM_STAT_BUSY &&
 407                  c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
 408                 return 0;
 409         dev_warn(&h->pdev->dev, HPSA "device busy");
 410         return 1;
 411 }
 412
 413 static u32 lockup_detected(struct ctlr_info *h);
 414 static ssize_t host_show_lockup_detected(struct device *dev,
 415                 struct device_attribute *attr, char *buf)
 416 {
 417         int ld;
 418         struct ctlr_info *h;
 419         struct Scsi_Host *shost = class_to_shost(dev);
 420
 421         h = shost_to_hba(shost);
 422         ld = lockup_detected(h);
 423
 424         return sprintf(buf, "ld=%d\n", ld);
 425 }
 426
 427 static ssize_t host_store_hp_ssd_smart_path_status(struct device *dev,
 428                                          struct device_attribute *attr,
 429                                          const char *buf, size_t count)
 430 {
 431         int status, len;
 432         struct ctlr_info *h;
 433         struct Scsi_Host *shost = class_to_shost(dev);
 434         char tmpbuf[10];
 435
 436         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 437                 return -EACCES;
 438         len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
 439         strncpy(tmpbuf, buf, len);
 440         tmpbuf[len] = '\0';
 441         if (sscanf(tmpbuf, "%d", &status) != 1)
 442                 return -EINVAL;
 443         h = shost_to_hba(shost);
 444         h->acciopath_status = !!status;
 445         dev_warn(&h->pdev->dev,
 446                 "hpsa: HP SSD Smart Path %s via sysfs update.\n",
 447                 h->acciopath_status ? "enabled" : "disabled");
 448         return count;
 449 }
 450
 451 static ssize_t host_store_raid_offload_debug(struct device *dev,
 452                                          struct device_attribute *attr,
 453                                          const char *buf, size_t count)
 454 {
 455         int debug_level, len;
 456         struct ctlr_info *h;
 457         struct Scsi_Host *shost = class_to_shost(dev);
 458         char tmpbuf[10];
 459
 460         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 461                 return -EACCES;
 462         len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
 463         strncpy(tmpbuf, buf, len);
 464         tmpbuf[len] = '\0';
 465         if (sscanf(tmpbuf, "%d", &debug_level) != 1)
 466                 return -EINVAL;
 467         if (debug_level < 0)
 468                 debug_level = 0;
 469         h = shost_to_hba(shost);
 470         h->raid_offload_debug = debug_level;
 471         dev_warn(&h->pdev->dev, "hpsa: Set raid_offload_debug level = %d\n",
 472                 h->raid_offload_debug);
 473         return count;
 474 }
 475
 476 static ssize_t host_store_rescan(struct device *dev,
 477                                  struct device_attribute *attr,
 478                                  const char *buf, size_t count)
 479 {
 480         struct ctlr_info *h;
 481         struct Scsi_Host *shost = class_to_shost(dev);
 482         h = shost_to_hba(shost);
 483         hpsa_scan_start(h->scsi_host);
 484         return count;
 485 }
 486
 487 static ssize_t host_show_firmware_revision(struct device *dev,
 488              struct device_attribute *attr, char *buf)
 489 {
 490         struct ctlr_info *h;
 491         struct Scsi_Host *shost = class_to_shost(dev);
 492         unsigned char *fwrev;
 493
 494         h = shost_to_hba(shost);
 495         if (!h->hba_inquiry_data)
 496                 return 0;
 497         fwrev = &h->hba_inquiry_data[32];
 498         return snprintf(buf, 20, "%c%c%c%c\n",
 499                 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 500 }
 501
 502 static ssize_t host_show_commands_outstanding(struct device *dev,
 503              struct device_attribute *attr, char *buf)
 504 {
 505         struct Scsi_Host *shost = class_to_shost(dev);
 506         struct ctlr_info *h = shost_to_hba(shost);
 507
 508         return snprintf(buf, 20, "%d\n",
 509                         atomic_read(&h->commands_outstanding));
 510 }
 511
 512 static ssize_t host_show_transport_mode(struct device *dev,
 513         struct device_attribute *attr, char *buf)
 514 {
 515         struct ctlr_info *h;
 516         struct Scsi_Host *shost = class_to_shost(dev);
 517
 518         h = shost_to_hba(shost);
 519         return snprintf(buf, 20, "%s\n",
 520                 h->transMethod & CFGTBL_Trans_Performant ?
 521                         "performant" : "simple");
 522 }
 523
 524 static ssize_t host_show_hp_ssd_smart_path_status(struct device *dev,
 525         struct device_attribute *attr, char *buf)
 526 {
 527         struct ctlr_info *h;
 528         struct Scsi_Host *shost = class_to_shost(dev);
 529
 530         h = shost_to_hba(shost);
 531         return snprintf(buf, 30, "HP SSD Smart Path %s\n",
 532                 (h->acciopath_status == 1) ?  "enabled" : "disabled");
 533 }
 534
 535 /* List of controllers which cannot be hard reset on kexec with reset_devices */
 536 static u32 unresettable_controller[] = {
 537         0x324a103C, /* Smart Array P712m */
 538         0x324b103C, /* Smart Array P711m */
 539         0x3223103C, /* Smart Array P800 */
 540         0x3234103C, /* Smart Array P400 */
 541         0x3235103C, /* Smart Array P400i */
 542         0x3211103C, /* Smart Array E200i */
 543         0x3212103C, /* Smart Array E200 */
 544         0x3213103C, /* Smart Array E200i */
 545         0x3214103C, /* Smart Array E200i */
 546         0x3215103C, /* Smart Array E200i */
 547         0x3237103C, /* Smart Array E500 */
 548         0x323D103C, /* Smart Array P700m */
 549         0x40800E11, /* Smart Array 5i */
 550         0x409C0E11, /* Smart Array 6400 */
 551         0x409D0E11, /* Smart Array 6400 EM */
 552         0x40700E11, /* Smart Array 5300 */
 553         0x40820E11, /* Smart Array 532 */
 554         0x40830E11, /* Smart Array 5312 */
 555         0x409A0E11, /* Smart Array 641 */
 556         0x409B0E11, /* Smart Array 642 */
 557         0x40910E11, /* Smart Array 6i */
 558 };
 559
 560 /* List of controllers which cannot even be soft reset */
 561 static u32 soft_unresettable_controller[] = {
 562         0x40800E11, /* Smart Array 5i */
 563         0x40700E11, /* Smart Array 5300 */
 564         0x40820E11, /* Smart Array 532 */
 565         0x40830E11, /* Smart Array 5312 */
 566         0x409A0E11, /* Smart Array 641 */
 567         0x409B0E11, /* Smart Array 642 */
 568         0x40910E11, /* Smart Array 6i */
 569         /* Exclude 640x boards.  These are two pci devices in one slot
 570          * which share a battery backed cache module.  One controls the
 571          * cache, the other accesses the cache through the one that controls
 572          * it.  If we reset the one controlling the cache, the other will
 573          * likely not be happy.  Just forbid resetting this conjoined mess.
 574          * The 640x isn't really supported by hpsa anyway.
 575          */
 576         0x409C0E11, /* Smart Array 6400 */
 577         0x409D0E11, /* Smart Array 6400 EM */
 578 };
 579
 580 static u32 needs_abort_tags_swizzled[] = {
 581         0x323D103C, /* Smart Array P700m */
 582         0x324a103C, /* Smart Array P712m */
 583         0x324b103C, /* SmartArray P711m */
 584 };
 585
 586 static int board_id_in_array(u32 a[], int nelems, u32 board_id)
 587 {
 588         int i;
 589
 590         for (i = 0; i < nelems; i++)
 591                 if (a[i] == board_id)
 592                         return 1;
 593         return 0;
 594 }
 595
 596 static int ctlr_is_hard_resettable(u32 board_id)
 597 {
 598         return !board_id_in_array(unresettable_controller,
 599                         ARRAY_SIZE(unresettable_controller), board_id);
 600 }
 601
 602 static int ctlr_is_soft_resettable(u32 board_id)
 603 {
 604         return !board_id_in_array(soft_unresettable_controller,
 605                         ARRAY_SIZE(soft_unresettable_controller), board_id);
 606 }
 607
 608 static int ctlr_is_resettable(u32 board_id)
 609 {
 610         return ctlr_is_hard_resettable(board_id) ||
 611                 ctlr_is_soft_resettable(board_id);
 612 }
 613
 614 static int ctlr_needs_abort_tags_swizzled(u32 board_id)
 615 {
 616         return board_id_in_array(needs_abort_tags_swizzled,
 617                         ARRAY_SIZE(needs_abort_tags_swizzled), board_id);
 618 }
 619
 620 static ssize_t host_show_resettable(struct device *dev,
 621         struct device_attribute *attr, char *buf)
 622 {
 623         struct ctlr_info *h;
 624         struct Scsi_Host *shost = class_to_shost(dev);
 625
 626         h = shost_to_hba(shost);
 627         return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
 628 }
 629
 630 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 631 {
 632         return (scsi3addr[3] & 0xC0) == 0x40;
 633 }
 634
 635 static const char * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
 636         "1(+0)ADM", "UNKNOWN", "PHYS DRV"
 637 };
 638 #define HPSA_RAID_0     0
 639 #define HPSA_RAID_4     1
 640 #define HPSA_RAID_1     2       /* also used for RAID 10 */
 641 #define HPSA_RAID_5     3       /* also used for RAID 50 */
 642 #define HPSA_RAID_51    4
 643 #define HPSA_RAID_6     5       /* also used for RAID 60 */
 644 #define HPSA_RAID_ADM   6       /* also used for RAID 1+0 ADM */
 645 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 2)
 646 #define PHYSICAL_DRIVE (ARRAY_SIZE(raid_label) - 1)
 647
 648 static inline bool is_logical_device(struct hpsa_scsi_dev_t *device)
 649 {
 650         return !device->physical_device;
 651 }
 652
 653 static ssize_t raid_level_show(struct device *dev,
 654              struct device_attribute *attr, char *buf)
 655 {
 656         ssize_t l = 0;
 657         unsigned char rlevel;
 658         struct ctlr_info *h;
 659         struct scsi_device *sdev;
 660         struct hpsa_scsi_dev_t *hdev;
 661         unsigned long flags;
 662
 663         sdev = to_scsi_device(dev);
 664         h = sdev_to_hba(sdev);
 665         spin_lock_irqsave(&h->lock, flags);
 666         hdev = sdev->hostdata;
 667         if (!hdev) {
 668                 spin_unlock_irqrestore(&h->lock, flags);
 669                 return -ENODEV;
 670         }
 671
 672         /* Is this even a logical drive? */
 673         if (!is_logical_device(hdev)) {
 674                 spin_unlock_irqrestore(&h->lock, flags);
 675                 l = snprintf(buf, PAGE_SIZE, "N/A\n");
 676                 return l;
 677         }
 678
 679         rlevel = hdev->raid_level;
 680         spin_unlock_irqrestore(&h->lock, flags);
 681         if (rlevel > RAID_UNKNOWN)
 682                 rlevel = RAID_UNKNOWN;
 683         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 684         return l;
 685 }
 686
 687 static ssize_t lunid_show(struct device *dev,
 688              struct device_attribute *attr, char *buf)
 689 {
 690         struct ctlr_info *h;
 691         struct scsi_device *sdev;
 692         struct hpsa_scsi_dev_t *hdev;
 693         unsigned long flags;
 694         unsigned char lunid[8];
 695
 696         sdev = to_scsi_device(dev);
 697         h = sdev_to_hba(sdev);
 698         spin_lock_irqsave(&h->lock, flags);
 699         hdev = sdev->hostdata;
 700         if (!hdev) {
 701                 spin_unlock_irqrestore(&h->lock, flags);
 702                 return -ENODEV;
 703         }
 704         memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 705         spin_unlock_irqrestore(&h->lock, flags);
 706         return snprintf(buf, 20, "0x%8phN\n", lunid);
 707 }
 708
 709 static ssize_t unique_id_show(struct device *dev,
 710              struct device_attribute *attr, char *buf)
 711 {
 712         struct ctlr_info *h;
 713         struct scsi_device *sdev;
 714         struct hpsa_scsi_dev_t *hdev;
 715         unsigned long flags;
 716         unsigned char sn[16];
 717
 718         sdev = to_scsi_device(dev);
 719         h = sdev_to_hba(sdev);
 720         spin_lock_irqsave(&h->lock, flags);
 721         hdev = sdev->hostdata;
 722         if (!hdev) {
 723                 spin_unlock_irqrestore(&h->lock, flags);
 724                 return -ENODEV;
 725         }
 726         memcpy(sn, hdev->device_id, sizeof(sn));
 727         spin_unlock_irqrestore(&h->lock, flags);
 728         return snprintf(buf, 16 * 2 + 2,
 729                         "%02X%02X%02X%02X%02X%02X%02X%02X"
 730                         "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 731                         sn[0], sn[1], sn[2], sn[3],
 732                         sn[4], sn[5], sn[6], sn[7],
 733                         sn[8], sn[9], sn[10], sn[11],
 734                         sn[12], sn[13], sn[14], sn[15]);
 735 }
 736
 737 static ssize_t sas_address_show(struct device *dev,
 738               struct device_attribute *attr, char *buf)
 739 {
 740         struct ctlr_info *h;
 741         struct scsi_device *sdev;
 742         struct hpsa_scsi_dev_t *hdev;
 743         unsigned long flags;
 744         u64 sas_address;
 745
 746         sdev = to_scsi_device(dev);
 747         h = sdev_to_hba(sdev);
 748         spin_lock_irqsave(&h->lock, flags);
 749         hdev = sdev->hostdata;
 750         if (!hdev || is_logical_device(hdev) || !hdev->expose_device) {
 751                 spin_unlock_irqrestore(&h->lock, flags);
 752                 return -ENODEV;
 753         }
 754         sas_address = hdev->sas_address;
 755         spin_unlock_irqrestore(&h->lock, flags);
 756
 757         return snprintf(buf, PAGE_SIZE, "0x%016llx\n", sas_address);
 758 }
 759
 760 static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
 761              struct device_attribute *attr, char *buf)
 762 {
 763         struct ctlr_info *h;
 764         struct scsi_device *sdev;
 765         struct hpsa_scsi_dev_t *hdev;
 766         unsigned long flags;
 767         int offload_enabled;
 768
 769         sdev = to_scsi_device(dev);
 770         h = sdev_to_hba(sdev);
 771         spin_lock_irqsave(&h->lock, flags);
 772         hdev = sdev->hostdata;
 773         if (!hdev) {
 774                 spin_unlock_irqrestore(&h->lock, flags);
 775                 return -ENODEV;
 776         }
 777         offload_enabled = hdev->offload_enabled;
 778         spin_unlock_irqrestore(&h->lock, flags);
 779         return snprintf(buf, 20, "%d\n", offload_enabled);
 780 }
 781
 782 #define MAX_PATHS 8
 783 static ssize_t path_info_show(struct device *dev,
 784              struct device_attribute *attr, char *buf)
 785 {
 786         struct ctlr_info *h;
 787         struct scsi_device *sdev;
 788         struct hpsa_scsi_dev_t *hdev;
 789         unsigned long flags;
 790         int i;
 791         int output_len = 0;
 792         u8 box;
 793         u8 bay;
 794         u8 path_map_index = 0;
 795         char *active;
 796         unsigned char phys_connector[2];
 797
 798         sdev = to_scsi_device(dev);
 799         h = sdev_to_hba(sdev);
 800         spin_lock_irqsave(&h->devlock, flags);
 801         hdev = sdev->hostdata;
 802         if (!hdev) {
 803                 spin_unlock_irqrestore(&h->devlock, flags);
 804                 return -ENODEV;
 805         }
 806
 807         bay = hdev->bay;
 808         for (i = 0; i < MAX_PATHS; i++) {
 809                 path_map_index = 1<<i;
 810                 if (i == hdev->active_path_index)
 811                         active = "Active";
 812                 else if (hdev->path_map & path_map_index)
 813                         active = "Inactive";
 814                 else
 815                         continue;
 816
 817                 output_len += scnprintf(buf + output_len,
 818                                 PAGE_SIZE - output_len,
 819                                 "[%d:%d:%d:%d] %20.20s ",
 820                                 h->scsi_host->host_no,
 821                                 hdev->bus, hdev->target, hdev->lun,
 822                                 scsi_device_type(hdev->devtype));
 823
 824                 if (hdev->devtype == TYPE_RAID || is_logical_device(hdev)) {
 825                         output_len += scnprintf(buf + output_len,
 826                                                 PAGE_SIZE - output_len,
 827                                                 "%s\n", active);
 828                         continue;
 829                 }
 830
 831                 box = hdev->box[i];
 832                 memcpy(&phys_connector, &hdev->phys_connector[i],
 833                         sizeof(phys_connector));
 834                 if (phys_connector[0] < '0')
 835                         phys_connector[0] = '0';
 836                 if (phys_connector[1] < '0')
 837                         phys_connector[1] = '0';
 838                 output_len += scnprintf(buf + output_len,
 839                                 PAGE_SIZE - output_len,
 840                                 "PORT: %.2s ",
 841                                 phys_connector);
 842                 if ((hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC) &&
 843                         hdev->expose_device) {
 844                         if (box == 0 || box == 0xFF) {
 845                                 output_len += scnprintf(buf + output_len,
 846                                         PAGE_SIZE - output_len,
 847                                         "BAY: %hhu %s\n",
 848                                         bay, active);
 849                         } else {
 850                                 output_len += scnprintf(buf + output_len,
 851                                         PAGE_SIZE - output_len,
 852                                         "BOX: %hhu BAY: %hhu %s\n",
 853                                         box, bay, active);
 854                         }
 855                 } else if (box != 0 && box != 0xFF) {
 856                         output_len += scnprintf(buf + output_len,
 857                                 PAGE_SIZE - output_len, "BOX: %hhu %s\n",
 858                                 box, active);
 859                 } else
 860                         output_len += scnprintf(buf + output_len,
 861                                 PAGE_SIZE - output_len, "%s\n", active);
 862         }
 863
 864         spin_unlock_irqrestore(&h->devlock, flags);
 865         return output_len;
 866 }
 867
 868 static ssize_t host_show_ctlr_num(struct device *dev,
 869         struct device_attribute *attr, char *buf)
 870 {
 871         struct ctlr_info *h;
 872         struct Scsi_Host *shost = class_to_shost(dev);
 873
 874         h = shost_to_hba(shost);
 875         return snprintf(buf, 20, "%d\n", h->ctlr);
 876 }
 877
 878 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
 879 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
 880 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 881 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 882 static DEVICE_ATTR(sas_address, S_IRUGO, sas_address_show, NULL);
 883 static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
 884                         host_show_hp_ssd_smart_path_enabled, NULL);
 885 static DEVICE_ATTR(path_info, S_IRUGO, path_info_show, NULL);
 886 static DEVICE_ATTR(hp_ssd_smart_path_status, S_IWUSR|S_IRUGO|S_IROTH,
 887                 host_show_hp_ssd_smart_path_status,
 888                 host_store_hp_ssd_smart_path_status);
 889 static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
 890                         host_store_raid_offload_debug);
 891 static DEVICE_ATTR(firmware_revision, S_IRUGO,
 892         host_show_firmware_revision, NULL);
 893 static DEVICE_ATTR(commands_outstanding, S_IRUGO,
 894         host_show_commands_outstanding, NULL);
 895 static DEVICE_ATTR(transport_mode, S_IRUGO,
 896         host_show_transport_mode, NULL);
 897 static DEVICE_ATTR(resettable, S_IRUGO,
 898         host_show_resettable, NULL);
 899 static DEVICE_ATTR(lockup_detected, S_IRUGO,
 900         host_show_lockup_detected, NULL);
 901 static DEVICE_ATTR(ctlr_num, S_IRUGO,
 902         host_show_ctlr_num, NULL);
 903
 904 static struct device_attribute *hpsa_sdev_attrs[] = {
 905         &dev_attr_raid_level,
 906         &dev_attr_lunid,
 907         &dev_attr_unique_id,
 908         &dev_attr_hp_ssd_smart_path_enabled,
 909         &dev_attr_path_info,
 910         &dev_attr_sas_address,
 911         NULL,
 912 };
 913
 914 static struct device_attribute *hpsa_shost_attrs[] = {
 915         &dev_attr_rescan,
 916         &dev_attr_firmware_revision,
 917         &dev_attr_commands_outstanding,
 918         &dev_attr_transport_mode,
 919         &dev_attr_resettable,
 920         &dev_attr_hp_ssd_smart_path_status,
 921         &dev_attr_raid_offload_debug,
 922         &dev_attr_lockup_detected,
 923         &dev_attr_ctlr_num,
 924         NULL,
 925 };
 926
 927 #define HPSA_NRESERVED_CMDS     (HPSA_CMDS_RESERVED_FOR_ABORTS + \
 928                 HPSA_CMDS_RESERVED_FOR_DRIVER + HPSA_MAX_CONCURRENT_PASSTHRUS)
 929
 930 static struct scsi_host_template hpsa_driver_template = {
 931         .module                 = THIS_MODULE,
 932         .name                   = HPSA,
 933         .proc_name              = HPSA,
 934         .queuecommand           = hpsa_scsi_queue_command,
 935         .scan_start             = hpsa_scan_start,
 936         .scan_finished          = hpsa_scan_finished,
 937         .change_queue_depth     = hpsa_change_queue_depth,
 938         .this_id                = -1,
 939         .use_clustering         = ENABLE_CLUSTERING,
 940         .eh_abort_handler       = hpsa_eh_abort_handler,
 941         .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 942         .ioctl                  = hpsa_ioctl,
 943         .slave_alloc            = hpsa_slave_alloc,
 944         .slave_configure        = hpsa_slave_configure,
 945         .slave_destroy          = hpsa_slave_destroy,
 946 #ifdef CONFIG_COMPAT
 947         .compat_ioctl           = hpsa_compat_ioctl,
 948 #endif
 949         .sdev_attrs = hpsa_sdev_attrs,
 950         .shost_attrs = hpsa_shost_attrs,
 951         .max_sectors = 8192,
 952         .no_write_same = 1,
 953 };
 954
 955 static inline u32 next_command(struct ctlr_info *h, u8 q)
 956 {
 957         u32 a;
 958         struct reply_queue_buffer *rq = &h->reply_queue[q];
 959
 960         if (h->transMethod & CFGTBL_Trans_io_accel1)
 961                 return h->access.command_completed(h, q);
 962
 963         if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
 964                 return h->access.command_completed(h, q);
 965
 966         if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
 967                 a = rq->head[rq->current_entry];
 968                 rq->current_entry++;
 969                 atomic_dec(&h->commands_outstanding);
 970         } else {
 971                 a = FIFO_EMPTY;
 972         }
 973         /* Check for wraparound */
 974         if (rq->current_entry == h->max_commands) {
 975                 rq->current_entry = 0;
 976                 rq->wraparound ^= 1;
 977         }
 978         return a;
 979 }
 980
 981 /*
 982  * There are some special bits in the bus address of the
 983  * command that we have to set for the controller to know
 984  * how to process the command:
 985  *
 986  * Normal performant mode:
 987  * bit 0: 1 means performant mode, 0 means simple mode.
 988  * bits 1-3 = block fetch table entry
 989  * bits 4-6 = command type (== 0)
 990  *
 991  * ioaccel1 mode:
 992  * bit 0 = "performant mode" bit.
 993  * bits 1-3 = block fetch table entry
 994  * bits 4-6 = command type (== 110)
 995  * (command type is needed because ioaccel1 mode
 996  * commands are submitted through the same register as normal
 997  * mode commands, so this is how the controller knows whether
 998  * the command is normal mode or ioaccel1 mode.)
 999  *
1000  * ioaccel2 mode:
1001  * bit 0 = "performant mode" bit.
1002  * bits 1-4 = block fetch table entry (note extra bit)
1003  * bits 4-6 = not needed, because ioaccel2 mode has
1004  * a separate special register for submitting commands.
1005  */
1006
1007 /*
1008  * set_performant_mode: Modify the tag for cciss performant
1009  * set bit 0 for pull model, bits 3-1 for block fetch
1010  * register number
1011  */
1012 #define DEFAULT_REPLY_QUEUE (-1)
1013 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
1014                                         int reply_queue)
1015 {
1016         if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
1017                 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
1018                 if (unlikely(!h->msix_vectors))
1019                         return;
1020                 if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1021                         c->Header.ReplyQueue =
1022                                 raw_smp_processor_id() % h->nreply_queues;
1023                 else
1024                         c->Header.ReplyQueue = reply_queue % h->nreply_queues;
1025         }
1026 }
1027
1028 static void set_ioaccel1_performant_mode(struct ctlr_info *h,
1029                                                 struct CommandList *c,
1030                                                 int reply_queue)
1031 {
1032         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
1033
1034         /*
1035          * Tell the controller to post the reply to the queue for this
1036          * processor.  This seems to give the best I/O throughput.
1037          */
1038         if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1039                 cp->ReplyQueue = smp_processor_id() % h->nreply_queues;
1040         else
1041                 cp->ReplyQueue = reply_queue % h->nreply_queues;
1042         /*
1043          * Set the bits in the address sent down to include:
1044          *  - performant mode bit (bit 0)
1045          *  - pull count (bits 1-3)
1046          *  - command type (bits 4-6)
1047          */
1048         c->busaddr |= 1 | (h->ioaccel1_blockFetchTable[c->Header.SGList] << 1) |
1049                                         IOACCEL1_BUSADDR_CMDTYPE;
1050 }
1051
1052 static void set_ioaccel2_tmf_performant_mode(struct ctlr_info *h,
1053                                                 struct CommandList *c,
1054                                                 int reply_queue)
1055 {
1056         struct hpsa_tmf_struct *cp = (struct hpsa_tmf_struct *)
1057                 &h->ioaccel2_cmd_pool[c->cmdindex];
1058
1059         /* Tell the controller to post the reply to the queue for this
1060          * processor.  This seems to give the best I/O throughput.
1061          */
1062         if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1063                 cp->reply_queue = smp_processor_id() % h->nreply_queues;
1064         else
1065                 cp->reply_queue = reply_queue % h->nreply_queues;
1066         /* Set the bits in the address sent down to include:
1067          *  - performant mode bit not used in ioaccel mode 2
1068          *  - pull count (bits 0-3)
1069          *  - command type isn't needed for ioaccel2
1070          */
1071         c->busaddr |= h->ioaccel2_blockFetchTable[0];
1072 }
1073
1074 static void set_ioaccel2_performant_mode(struct ctlr_info *h,
1075                                                 struct CommandList *c,
1076                                                 int reply_queue)
1077 {
1078         struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
1079
1080         /*
1081          * Tell the controller to post the reply to the queue for this
1082          * processor.  This seems to give the best I/O throughput.
1083          */
1084         if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1085                 cp->reply_queue = smp_processor_id() % h->nreply_queues;
1086         else
1087                 cp->reply_queue = reply_queue % h->nreply_queues;
1088         /*
1089          * Set the bits in the address sent down to include:
1090          *  - performant mode bit not used in ioaccel mode 2
1091          *  - pull count (bits 0-3)
1092          *  - command type isn't needed for ioaccel2
1093          */
1094         c->busaddr |= (h->ioaccel2_blockFetchTable[cp->sg_count]);
1095 }
1096
1097 static int is_firmware_flash_cmd(u8 *cdb)
1098 {
1099         return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
1100 }
1101
1102 /*
1103  * During firmware flash, the heartbeat register may not update as frequently
1104  * as it should.  So we dial down lockup detection during firmware flash. and
1105  * dial it back up when firmware flash completes.
1106  */
1107 #define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)
1108 #define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)
1109 static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
1110                 struct CommandList *c)
1111 {
1112         if (!is_firmware_flash_cmd(c->Request.CDB))
1113                 return;
1114         atomic_inc(&h->firmware_flash_in_progress);
1115         h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
1116 }
1117
1118 static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
1119                 struct CommandList *c)
1120 {
1121         if (is_firmware_flash_cmd(c->Request.CDB) &&
1122                 atomic_dec_and_test(&h->firmware_flash_in_progress))
1123                 h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
1124 }
1125
1126 static void __enqueue_cmd_and_start_io(struct ctlr_info *h,
1127         struct CommandList *c, int reply_queue)
1128 {
1129         dial_down_lockup_detection_during_fw_flash(h, c);
1130         atomic_inc(&h->commands_outstanding);
1131         switch (c->cmd_type) {
1132         case CMD_IOACCEL1:
1133                 set_ioaccel1_performant_mode(h, c, reply_queue);
1134                 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
1135                 break;
1136         case CMD_IOACCEL2:
1137                 set_ioaccel2_performant_mode(h, c, reply_queue);
1138                 writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1139                 break;
1140         case IOACCEL2_TMF:
1141                 set_ioaccel2_tmf_performant_mode(h, c, reply_queue);
1142                 writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1143                 break;
1144         default:
1145                 set_performant_mode(h, c, reply_queue);
1146                 h->access.submit_command(h, c);
1147         }
1148 }
1149
1150 static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c)
1151 {
1152         if (unlikely(hpsa_is_pending_event(c)))
1153                 return finish_cmd(c);
1154
1155         __enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
1156 }
1157
1158 static inline int is_hba_lunid(unsigned char scsi3addr[])
1159 {
1160         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
1161 }
1162
1163 static inline int is_scsi_rev_5(struct ctlr_info *h)
1164 {
1165         if (!h->hba_inquiry_data)
1166                 return 0;
1167         if ((h->hba_inquiry_data[2] & 0x07) == 5)
1168                 return 1;
1169         return 0;
1170 }
1171
1172 static int hpsa_find_target_lun(struct ctlr_info *h,
1173         unsigned char scsi3addr[], int bus, int *target, int *lun)
1174 {
1175         /* finds an unused bus, target, lun for a new physical device
1176          * assumes h->devlock is held
1177          */
1178         int i, found = 0;
1179         DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
1180
1181         bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
1182
1183         for (i = 0; i < h->ndevices; i++) {
1184                 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
1185                         __set_bit(h->dev[i]->target, lun_taken);
1186         }
1187
1188         i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
1189         if (i < HPSA_MAX_DEVICES) {
1190                 /* *bus = 1; */
1191                 *target = i;
1192                 *lun = 0;
1193                 found = 1;
1194         }
1195         return !found;
1196 }
1197
1198 static void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
1199         struct hpsa_scsi_dev_t *dev, char *description)
1200 {
1201 #define LABEL_SIZE 25
1202         char label[LABEL_SIZE];
1203
1204         if (h == NULL || h->pdev == NULL || h->scsi_host == NULL)
1205                 return;
1206
1207         switch (dev->devtype) {
1208         case TYPE_RAID:
1209                 snprintf(label, LABEL_SIZE, "controller");
1210                 break;
1211         case TYPE_ENCLOSURE:
1212                 snprintf(label, LABEL_SIZE, "enclosure");
1213                 break;
1214         case TYPE_DISK:
1215         case TYPE_ZBC:
1216                 if (dev->external)
1217                         snprintf(label, LABEL_SIZE, "external");
1218                 else if (!is_logical_dev_addr_mode(dev->scsi3addr))
1219                         snprintf(label, LABEL_SIZE, "%s",
1220                                 raid_label[PHYSICAL_DRIVE]);
1221                 else
1222                         snprintf(label, LABEL_SIZE, "RAID-%s",
1223                                 dev->raid_level > RAID_UNKNOWN ? "?" :
1224                                 raid_label[dev->raid_level]);
1225                 break;
1226         case TYPE_ROM:
1227                 snprintf(label, LABEL_SIZE, "rom");
1228                 break;
1229         case TYPE_TAPE:
1230                 snprintf(label, LABEL_SIZE, "tape");
1231                 break;
1232         case TYPE_MEDIUM_CHANGER:
1233                 snprintf(label, LABEL_SIZE, "changer");
1234                 break;
1235         default:
1236                 snprintf(label, LABEL_SIZE, "UNKNOWN");
1237                 break;
1238         }
1239
1240         dev_printk(level, &h->pdev->dev,
1241                         "scsi %d:%d:%d:%d: %s %s %.8s %.16s %s SSDSmartPathCap%c En%c Exp=%d\n",
1242                         h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
1243                         description,
1244                         scsi_device_type(dev->devtype),
1245                         dev->vendor,
1246                         dev->model,
1247                         label,
1248                         dev->offload_config ? '+' : '-',
1249                         dev->offload_enabled ? '+' : '-',
1250                         dev->expose_device);
1251 }
1252
1253 /* Add an entry into h->dev[] array. */
1254 static int hpsa_scsi_add_entry(struct ctlr_info *h,
1255                 struct hpsa_scsi_dev_t *device,
1256                 struct hpsa_scsi_dev_t *added[], int *nadded)
1257 {
1258         /* assumes h->devlock is held */
1259         int n = h->ndevices;
1260         int i;
1261         unsigned char addr1[8], addr2[8];
1262         struct hpsa_scsi_dev_t *sd;
1263
1264         if (n >= HPSA_MAX_DEVICES) {
1265                 dev_err(&h->pdev->dev, "too many devices, some will be "
1266                         "inaccessible.\n");
1267                 return -1;
1268         }
1269
1270         /* physical devices do not have lun or target assigned until now. */
1271         if (device->lun != -1)
1272                 /* Logical device, lun is already assigned. */
1273                 goto lun_assigned;
1274
1275         /* If this device a non-zero lun of a multi-lun device
1276          * byte 4 of the 8-byte LUN addr will contain the logical
1277          * unit no, zero otherwise.
1278          */
1279         if (device->scsi3addr[4] == 0) {
1280                 /* This is not a non-zero lun of a multi-lun device */
1281                 if (hpsa_find_target_lun(h, device->scsi3addr,
1282                         device->bus, &device->target, &device->lun) != 0)
1283                         return -1;
1284                 goto lun_assigned;
1285         }
1286
1287         /* This is a non-zero lun of a multi-lun device.
1288          * Search through our list and find the device which
1289          * has the same 8 byte LUN address, excepting byte 4 and 5.
1290          * Assign the same bus and target for this new LUN.
1291          * Use the logical unit number from the firmware.
1292          */
1293         memcpy(addr1, device->scsi3addr, 8);
1294         addr1[4] = 0;
1295         addr1[5] = 0;
1296         for (i = 0; i < n; i++) {
1297                 sd = h->dev[i];
1298                 memcpy(addr2, sd->scsi3addr, 8);
1299                 addr2[4] = 0;
1300                 addr2[5] = 0;
1301                 /* differ only in byte 4 and 5? */
1302                 if (memcmp(addr1, addr2, 8) == 0) {
1303                         device->bus = sd->bus;
1304                         device->target = sd->target;
1305                         device->lun = device->scsi3addr[4];
1306                         break;
1307                 }
1308         }
1309         if (device->lun == -1) {
1310                 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
1311                         " suspect firmware bug or unsupported hardware "
1312                         "configuration.\n");
1313                         return -1;
1314         }
1315
1316 lun_assigned:
1317
1318         h->dev[n] = device;
1319         h->ndevices++;
1320         added[*nadded] = device;
1321         (*nadded)++;
1322         hpsa_show_dev_msg(KERN_INFO, h, device,
1323                 device->expose_device ? "added" : "masked");
1324         device->offload_to_be_enabled = device->offload_enabled;
1325         device->offload_enabled = 0;
1326         return 0;
1327 }
1328
1329 /* Update an entry in h->dev[] array. */
1330 static void hpsa_scsi_update_entry(struct ctlr_info *h,
1331         int entry, struct hpsa_scsi_dev_t *new_entry)
1332 {
1333         int offload_enabled;
1334         /* assumes h->devlock is held */
1335         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1336
1337         /* Raid level changed. */
1338         h->dev[entry]->raid_level = new_entry->raid_level;
1339
1340         /* Raid offload parameters changed.  Careful about the ordering. */
1341         if (new_entry->offload_config && new_entry->offload_enabled) {
1342                 /*
1343                  * if drive is newly offload_enabled, we want to copy the
1344                  * raid map data first.  If previously offload_enabled and
1345                  * offload_config were set, raid map data had better be
1346                  * the same as it was before.  if raid map data is changed
1347                  * then it had better be the case that
1348                  * h->dev[entry]->offload_enabled is currently 0.
1349                  */
1350                 h->dev[entry]->raid_map = new_entry->raid_map;
1351                 h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1352         }
1353         if (new_entry->hba_ioaccel_enabled) {
1354                 h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1355                 wmb(); /* set ioaccel_handle *before* hba_ioaccel_enabled */
1356         }
1357         h->dev[entry]->hba_ioaccel_enabled = new_entry->hba_ioaccel_enabled;
1358         h->dev[entry]->offload_config = new_entry->offload_config;
1359         h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
1360         h->dev[entry]->queue_depth = new_entry->queue_depth;
1361
1362         /*
1363          * We can turn off ioaccel offload now, but need to delay turning
1364          * it on until we can update h->dev[entry]->phys_disk[], but we
1365          * can't do that until all the devices are updated.
1366          */
1367         h->dev[entry]->offload_to_be_enabled = new_entry->offload_enabled;
1368         if (!new_entry->offload_enabled)
1369                 h->dev[entry]->offload_enabled = 0;
1370
1371         offload_enabled = h->dev[entry]->offload_enabled;
1372         h->dev[entry]->offload_enabled = h->dev[entry]->offload_to_be_enabled;
1373         hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
1374         h->dev[entry]->offload_enabled = offload_enabled;
1375 }
1376
1377 /* Replace an entry from h->dev[] array. */
1378 static void hpsa_scsi_replace_entry(struct ctlr_info *h,
1379         int entry, struct hpsa_scsi_dev_t *new_entry,
1380         struct hpsa_scsi_dev_t *added[], int *nadded,
1381         struct hpsa_scsi_dev_t *removed[], int *nremoved)
1382 {
1383         /* assumes h->devlock is held */
1384         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1385         removed[*nremoved] = h->dev[entry];
1386         (*nremoved)++;
1387
1388         /*
1389          * New physical devices won't have target/lun assigned yet
1390          * so we need to preserve the values in the slot we are replacing.
1391          */
1392         if (new_entry->target == -1) {
1393                 new_entry->target = h->dev[entry]->target;
1394                 new_entry->lun = h->dev[entry]->lun;
1395         }
1396
1397         h->dev[entry] = new_entry;
1398         added[*nadded] = new_entry;
1399         (*nadded)++;
1400         hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
1401         new_entry->offload_to_be_enabled = new_entry->offload_enabled;
1402         new_entry->offload_enabled = 0;
1403 }
1404
1405 /* Remove an entry from h->dev[] array. */
1406 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int entry,
1407         struct hpsa_scsi_dev_t *removed[], int *nremoved)
1408 {
1409         /* assumes h->devlock is held */
1410         int i;
1411         struct hpsa_scsi_dev_t *sd;
1412
1413         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1414
1415         sd = h->dev[entry];
1416         removed[*nremoved] = h->dev[entry];
1417         (*nremoved)++;
1418
1419         for (i = entry; i < h->ndevices-1; i++)
1420                 h->dev[i] = h->dev[i+1];
1421         h->ndevices--;
1422         hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
1423 }
1424
1425 #define SCSI3ADDR_EQ(a, b) ( \
1426         (a)[7] == (b)[7] && \
1427         (a)[6] == (b)[6] && \
1428         (a)[5] == (b)[5] && \
1429         (a)[4] == (b)[4] && \
1430         (a)[3] == (b)[3] && \
1431         (a)[2] == (b)[2] && \
1432         (a)[1] == (b)[1] && \
1433         (a)[0] == (b)[0])
1434
1435 static void fixup_botched_add(struct ctlr_info *h,
1436         struct hpsa_scsi_dev_t *added)
1437 {
1438         /* called when scsi_add_device fails in order to re-adjust
1439          * h->dev[] to match the mid layer's view.
1440          */
1441         unsigned long flags;
1442         int i, j;
1443
1444         spin_lock_irqsave(&h->lock, flags);
1445         for (i = 0; i < h->ndevices; i++) {
1446                 if (h->dev[i] == added) {
1447                         for (j = i; j < h->ndevices-1; j++)
1448                                 h->dev[j] = h->dev[j+1];
1449                         h->ndevices--;
1450                         break;
1451                 }
1452         }
1453         spin_unlock_irqrestore(&h->lock, flags);
1454         kfree(added);
1455 }
1456
1457 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
1458         struct hpsa_scsi_dev_t *dev2)
1459 {
1460         /* we compare everything except lun and target as these
1461          * are not yet assigned.  Compare parts likely
1462          * to differ first
1463          */
1464         if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
1465                 sizeof(dev1->scsi3addr)) != 0)
1466                 return 0;
1467         if (memcmp(dev1->device_id, dev2->device_id,
1468                 sizeof(dev1->device_id)) != 0)
1469                 return 0;
1470         if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
1471                 return 0;
1472         if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
1473                 return 0;
1474         if (dev1->devtype != dev2->devtype)
1475                 return 0;
1476         if (dev1->bus != dev2->bus)
1477                 return 0;
1478         return 1;
1479 }
1480
1481 static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
1482         struct hpsa_scsi_dev_t *dev2)
1483 {
1484         /* Device attributes that can change, but don't mean
1485          * that the device is a different device, nor that the OS
1486          * needs to be told anything about the change.
1487          */
1488         if (dev1->raid_level != dev2->raid_level)
1489                 return 1;
1490         if (dev1->offload_config != dev2->offload_config)
1491                 return 1;
1492         if (dev1->offload_enabled != dev2->offload_enabled)
1493                 return 1;
1494         if (!is_logical_dev_addr_mode(dev1->scsi3addr))
1495                 if (dev1->queue_depth != dev2->queue_depth)
1496                         return 1;
1497         return 0;
1498 }
1499
1500 /* Find needle in haystack.  If exact match found, return DEVICE_SAME,
1501  * and return needle location in *index.  If scsi3addr matches, but not
1502  * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
1503  * location in *index.
1504  * In the case of a minor device attribute change, such as RAID level, just
1505  * return DEVICE_UPDATED, along with the updated device's location in index.
1506  * If needle not found, return DEVICE_NOT_FOUND.
1507  */
1508 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
1509         struct hpsa_scsi_dev_t *haystack[], int haystack_size,
1510         int *index)
1511 {
1512         int i;
1513 #define DEVICE_NOT_FOUND 0
1514 #define DEVICE_CHANGED 1
1515 #define DEVICE_SAME 2
1516 #define DEVICE_UPDATED 3
1517         if (needle == NULL)
1518                 return DEVICE_NOT_FOUND;
1519
1520         for (i = 0; i < haystack_size; i++) {
1521                 if (haystack[i] == NULL) /* previously removed. */
1522                         continue;
1523                 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
1524                         *index = i;
1525                         if (device_is_the_same(needle, haystack[i])) {
1526                                 if (device_updated(needle, haystack[i]))
1527                                         return DEVICE_UPDATED;
1528                                 return DEVICE_SAME;
1529                         } else {
1530                                 /* Keep offline devices offline */
1531                                 if (needle->volume_offline)
1532                                         return DEVICE_NOT_FOUND;
1533                                 return DEVICE_CHANGED;
1534                         }
1535                 }
1536         }
1537         *index = -1;
1538         return DEVICE_NOT_FOUND;
1539 }
1540
1541 static void hpsa_monitor_offline_device(struct ctlr_info *h,
1542                                         unsigned char scsi3addr[])
1543 {
1544         struct offline_device_entry *device;
1545         unsigned long flags;
1546
1547         /* Check to see if device is already on the list */
1548         spin_lock_irqsave(&h->offline_device_lock, flags);
1549         list_for_each_entry(device, &h->offline_device_list, offline_list) {
1550                 if (memcmp(device->scsi3addr, scsi3addr,
1551                         sizeof(device->scsi3addr)) == 0) {
1552                         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1553                         return;
1554                 }
1555         }
1556         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1557
1558         /* Device is not on the list, add it. */
1559         device = kmalloc(sizeof(*device), GFP_KERNEL);
1560         if (!device)
1561                 return;
1562
1563         memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1564         spin_lock_irqsave(&h->offline_device_lock, flags);
1565         list_add_tail(&device->offline_list, &h->offline_device_list);
1566         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1567 }
1568
1569 /* Print a message explaining various offline volume states */
1570 static void hpsa_show_volume_status(struct ctlr_info *h,
1571         struct hpsa_scsi_dev_t *sd)
1572 {
1573         if (sd->volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED)
1574                 dev_info(&h->pdev->dev,
1575                         "C%d:B%d:T%d:L%d Volume status is not available through vital product data pages.\n",
1576                         h->scsi_host->host_no,
1577                         sd->bus, sd->target, sd->lun);
1578         switch (sd->volume_offline) {
1579         case HPSA_LV_OK:
1580                 break;
1581         case HPSA_LV_UNDERGOING_ERASE:
1582                 dev_info(&h->pdev->dev,
1583                         "C%d:B%d:T%d:L%d Volume is undergoing background erase process.\n",
1584                         h->scsi_host->host_no,
1585                         sd->bus, sd->target, sd->lun);
1586                 break;
1587         case HPSA_LV_NOT_AVAILABLE:
1588                 dev_info(&h->pdev->dev,
1589                         "C%d:B%d:T%d:L%d Volume is waiting for transforming volume.\n",
1590                         h->scsi_host->host_no,
1591                         sd->bus, sd->target, sd->lun);
1592                 break;
1593         case HPSA_LV_UNDERGOING_RPI:
1594                 dev_info(&h->pdev->dev,
1595                         "C%d:B%d:T%d:L%d Volume is undergoing rapid parity init.\n",
1596                         h->scsi_host->host_no,
1597                         sd->bus, sd->target, sd->lun);
1598                 break;
1599         case HPSA_LV_PENDING_RPI:
1600                 dev_info(&h->pdev->dev,
1601                         "C%d:B%d:T%d:L%d Volume is queued for rapid parity initialization process.\n",
1602                         h->scsi_host->host_no,
1603                         sd->bus, sd->target, sd->lun);
1604                 break;
1605         case HPSA_LV_ENCRYPTED_NO_KEY:
1606                 dev_info(&h->pdev->dev,
1607                         "C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because key is not present.\n",
1608                         h->scsi_host->host_no,
1609                         sd->bus, sd->target, sd->lun);
1610                 break;
1611         case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
1612                 dev_info(&h->pdev->dev,
1613                         "C%d:B%d:T%d:L%d Volume is not encrypted and cannot be accessed because controller is in encryption-only mode.\n",
1614                         h->scsi_host->host_no,
1615                         sd->bus, sd->target, sd->lun);
1616                 break;
1617         case HPSA_LV_UNDERGOING_ENCRYPTION:
1618                 dev_info(&h->pdev->dev,
1619                         "C%d:B%d:T%d:L%d Volume is undergoing encryption process.\n",
1620                         h->scsi_host->host_no,
1621                         sd->bus, sd->target, sd->lun);
1622                 break;
1623         case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
1624                 dev_info(&h->pdev->dev,
1625                         "C%d:B%d:T%d:L%d Volume is undergoing encryption re-keying process.\n",
1626                         h->scsi_host->host_no,
1627                         sd->bus, sd->target, sd->lun);
1628                 break;
1629         case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1630                 dev_info(&h->pdev->dev,
1631                         "C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because controller does not have encryption enabled.\n",
1632                         h->scsi_host->host_no,
1633                         sd->bus, sd->target, sd->lun);
1634                 break;
1635         case HPSA_LV_PENDING_ENCRYPTION:
1636                 dev_info(&h->pdev->dev,
1637                         "C%d:B%d:T%d:L%d Volume is pending migration to encrypted state, but process has not started.\n",
1638                         h->scsi_host->host_no,
1639                         sd->bus, sd->target, sd->lun);
1640                 break;
1641         case HPSA_LV_PENDING_ENCRYPTION_REKEYING:
1642                 dev_info(&h->pdev->dev,
1643                         "C%d:B%d:T%d:L%d Volume is encrypted and is pending encryption rekeying.\n",
1644                         h->scsi_host->host_no,
1645                         sd->bus, sd->target, sd->lun);
1646                 break;
1647         }
1648 }
1649
1650 /*
1651  * Figure the list of physical drive pointers for a logical drive with
1652  * raid offload configured.
1653  */
1654 static void hpsa_figure_phys_disk_ptrs(struct ctlr_info *h,
1655                                 struct hpsa_scsi_dev_t *dev[], int ndevices,
1656                                 struct hpsa_scsi_dev_t *logical_drive)
1657 {
1658         struct raid_map_data *map = &logical_drive->raid_map;
1659         struct raid_map_disk_data *dd = &map->data[0];
1660         int i, j;
1661         int total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
1662                                 le16_to_cpu(map->metadata_disks_per_row);
1663         int nraid_map_entries = le16_to_cpu(map->row_cnt) *
1664                                 le16_to_cpu(map->layout_map_count) *
1665                                 total_disks_per_row;
1666         int nphys_disk = le16_to_cpu(map->layout_map_count) *
1667                                 total_disks_per_row;
1668         int qdepth;
1669
1670         if (nraid_map_entries > RAID_MAP_MAX_ENTRIES)
1671                 nraid_map_entries = RAID_MAP_MAX_ENTRIES;
1672
1673         logical_drive->nphysical_disks = nraid_map_entries;
1674
1675         qdepth = 0;
1676         for (i = 0; i < nraid_map_entries; i++) {
1677                 logical_drive->phys_disk[i] = NULL;
1678                 if (!logical_drive->offload_config)
1679                         continue;
1680                 for (j = 0; j < ndevices; j++) {
1681                         if (dev[j] == NULL)
1682                                 continue;
1683                         if (dev[j]->devtype != TYPE_DISK &&
1684                             dev[j]->devtype != TYPE_ZBC)
1685                                 continue;
1686                         if (is_logical_device(dev[j]))
1687                                 continue;
1688                         if (dev[j]->ioaccel_handle != dd[i].ioaccel_handle)
1689                                 continue;
1690
1691                         logical_drive->phys_disk[i] = dev[j];
1692                         if (i < nphys_disk)
1693                                 qdepth = min(h->nr_cmds, qdepth +
1694                                     logical_drive->phys_disk[i]->queue_depth);
1695                         break;
1696                 }
1697
1698                 /*
1699                  * This can happen if a physical drive is removed and
1700                  * the logical drive is degraded.  In that case, the RAID
1701                  * map data will refer to a physical disk which isn't actually
1702                  * present.  And in that case offload_enabled should already
1703                  * be 0, but we'll turn it off here just in case
1704                  */
1705                 if (!logical_drive->phys_disk[i]) {
1706                         logical_drive->offload_enabled = 0;
1707                         logical_drive->offload_to_be_enabled = 0;
1708                         logical_drive->queue_depth = 8;
1709                 }
1710         }
1711         if (nraid_map_entries)
1712                 /*
1713                  * This is correct for reads, too high for full stripe writes,
1714                  * way too high for partial stripe writes
1715                  */
1716                 logical_drive->queue_depth = qdepth;
1717         else
1718                 logical_drive->queue_depth = h->nr_cmds;
1719 }
1720
1721 static void hpsa_update_log_drive_phys_drive_ptrs(struct ctlr_info *h,
1722                                 struct hpsa_scsi_dev_t *dev[], int ndevices)
1723 {
1724         int i;
1725
1726         for (i = 0; i < ndevices; i++) {
1727                 if (dev[i] == NULL)
1728                         continue;
1729                 if (dev[i]->devtype != TYPE_DISK &&
1730                     dev[i]->devtype != TYPE_ZBC)
1731                         continue;
1732                 if (!is_logical_device(dev[i]))
1733                         continue;
1734
1735                 /*
1736                  * If offload is currently enabled, the RAID map and
1737                  * phys_disk[] assignment *better* not be changing
1738                  * and since it isn't changing, we do not need to
1739                  * update it.
1740                  */
1741                 if (dev[i]->offload_enabled)
1742                         continue;
1743
1744                 hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
1745         }
1746 }
1747
1748 static int hpsa_add_device(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1749 {
1750         int rc = 0;
1751
1752         if (!h->scsi_host)
1753                 return 1;
1754
1755         if (is_logical_device(device)) /* RAID */
1756                 rc = scsi_add_device(h->scsi_host, device->bus,
1757                                         device->target, device->lun);
1758         else /* HBA */
1759                 rc = hpsa_add_sas_device(h->sas_host, device);
1760
1761         return rc;
1762 }
1763
1764 static int hpsa_find_outstanding_commands_for_dev(struct ctlr_info *h,
1765                                                 struct hpsa_scsi_dev_t *dev)
1766 {
1767         int i;
1768         int count = 0;
1769
1770         for (i = 0; i < h->nr_cmds; i++) {
1771                 struct CommandList *c = h->cmd_pool + i;
1772                 int refcount = atomic_inc_return(&c->refcount);
1773
1774                 if (refcount > 1 && hpsa_cmd_dev_match(h, c, dev,
1775                                 dev->scsi3addr)) {
1776                         unsigned long flags;
1777
1778                         spin_lock_irqsave(&h->lock, flags);     /* Implied MB */
1779                         if (!hpsa_is_cmd_idle(c))
1780                                 ++count;
1781                         spin_unlock_irqrestore(&h->lock, flags);
1782                 }
1783
1784                 cmd_free(h, c);
1785         }
1786
1787         return count;
1788 }
1789
1790 static void hpsa_wait_for_outstanding_commands_for_dev(struct ctlr_info *h,
1791                                                 struct hpsa_scsi_dev_t *device)
1792 {
1793         int cmds = 0;
1794         int waits = 0;
1795
1796         while (1) {
1797                 cmds = hpsa_find_outstanding_commands_for_dev(h, device);
1798                 if (cmds == 0)
1799                         break;
1800                 if (++waits > 20)
1801                         break;
1802                 dev_warn(&h->pdev->dev,
1803                         "%s: removing device with %d outstanding commands!\n",
1804                         __func__, cmds);
1805                 msleep(1000);
1806         }
1807 }
1808
1809 static void hpsa_remove_device(struct ctlr_info *h,
1810                         struct hpsa_scsi_dev_t *device)
1811 {
1812         struct scsi_device *sdev = NULL;
1813
1814         if (!h->scsi_host)
1815                 return;
1816
1817         if (is_logical_device(device)) { /* RAID */
1818                 sdev = scsi_device_lookup(h->scsi_host, device->bus,
1819                                                 device->target, device->lun);
1820                 if (sdev) {
1821                         scsi_remove_device(sdev);
1822                         scsi_device_put(sdev);
1823                 } else {
1824                         /*
1825                          * We don't expect to get here.  Future commands
1826                          * to this device will get a selection timeout as
1827                          * if the device were gone.
1828                          */
1829                         hpsa_show_dev_msg(KERN_WARNING, h, device,
1830                                         "didn't find device for removal.");
1831                 }
1832         } else { /* HBA */
1833
1834                 device->removed = 1;
1835                 hpsa_wait_for_outstanding_commands_for_dev(h, device);
1836
1837                 hpsa_remove_sas_device(device);
1838         }
1839 }
1840
1841 static void adjust_hpsa_scsi_table(struct ctlr_info *h,
1842         struct hpsa_scsi_dev_t *sd[], int nsds)
1843 {
1844         /* sd contains scsi3 addresses and devtypes, and inquiry
1845          * data.  This function takes what's in sd to be the current
1846          * reality and updates h->dev[] to reflect that reality.
1847          */
1848         int i, entry, device_change, changes = 0;
1849         struct hpsa_scsi_dev_t *csd;
1850         unsigned long flags;
1851         struct hpsa_scsi_dev_t **added, **removed;
1852         int nadded, nremoved;
1853
1854         /*
1855          * A reset can cause a device status to change
1856          * re-schedule the scan to see what happened.
1857          */
1858         if (h->reset_in_progress) {
1859                 h->drv_req_rescan = 1;
1860                 return;
1861         }
1862
1863         added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
1864         removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
1865
1866         if (!added || !removed) {
1867                 dev_warn(&h->pdev->dev, "out of memory in "
1868                         "adjust_hpsa_scsi_table\n");
1869                 goto free_and_out;
1870         }
1871
1872         spin_lock_irqsave(&h->devlock, flags);
1873
1874         /* find any devices in h->dev[] that are not in
1875          * sd[] and remove them from h->dev[], and for any
1876          * devices which have changed, remove the old device
1877          * info and add the new device info.
1878          * If minor device attributes change, just update
1879          * the existing device structure.
1880          */
1881         i = 0;
1882         nremoved = 0;
1883         nadded = 0;
1884         while (i < h->ndevices) {
1885                 csd = h->dev[i];
1886                 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
1887                 if (device_change == DEVICE_NOT_FOUND) {
1888                         changes++;
1889                         hpsa_scsi_remove_entry(h, i, removed, &nremoved);
1890                         continue; /* remove ^^^, hence i not incremented */
1891                 } else if (device_change == DEVICE_CHANGED) {
1892                         changes++;
1893                         hpsa_scsi_replace_entry(h, i, sd[entry],
1894                                 added, &nadded, removed, &nremoved);
1895                         /* Set it to NULL to prevent it from being freed
1896                          * at the bottom of hpsa_update_scsi_devices()
1897                          */
1898                         sd[entry] = NULL;
1899                 } else if (device_change == DEVICE_UPDATED) {
1900                         hpsa_scsi_update_entry(h, i, sd[entry]);
1901                 }
1902                 i++;
1903         }
1904
1905         /* Now, make sure every device listed in sd[] is also
1906          * listed in h->dev[], adding them if they aren't found
1907          */
1908
1909         for (i = 0; i < nsds; i++) {
1910                 if (!sd[i]) /* if already added above. */
1911                         continue;
1912
1913                 /* Don't add devices which are NOT READY, FORMAT IN PROGRESS
1914                  * as the SCSI mid-layer does not handle such devices well.
1915                  * It relentlessly loops sending TUR at 3Hz, then READ(10)
1916                  * at 160Hz, and prevents the system from coming up.
1917                  */
1918                 if (sd[i]->volume_offline) {
1919                         hpsa_show_volume_status(h, sd[i]);
1920                         hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
1921                         continue;
1922                 }
1923
1924                 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
1925                                         h->ndevices, &entry);
1926                 if (device_change == DEVICE_NOT_FOUND) {
1927                         changes++;
1928                         if (hpsa_scsi_add_entry(h, sd[i], added, &nadded) != 0)
1929                                 break;
1930                         sd[i] = NULL; /* prevent from being freed later. */
1931                 } else if (device_change == DEVICE_CHANGED) {
1932                         /* should never happen... */
1933                         changes++;
1934                         dev_warn(&h->pdev->dev,
1935                                 "device unexpectedly changed.\n");
1936                         /* but if it does happen, we just ignore that device */
1937                 }
1938         }
1939         hpsa_update_log_drive_phys_drive_ptrs(h, h->dev, h->ndevices);
1940
1941         /* Now that h->dev[]->phys_disk[] is coherent, we can enable
1942          * any logical drives that need it enabled.
1943          */
1944         for (i = 0; i < h->ndevices; i++) {
1945                 if (h->dev[i] == NULL)
1946                         continue;
1947                 h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;
1948         }
1949
1950         spin_unlock_irqrestore(&h->devlock, flags);
1951
1952         /* Monitor devices which are in one of several NOT READY states to be
1953          * brought online later. This must be done without holding h->devlock,
1954          * so don't touch h->dev[]
1955          */
1956         for (i = 0; i < nsds; i++) {
1957                 if (!sd[i]) /* if already added above. */
1958                         continue;
1959                 if (sd[i]->volume_offline)
1960                         hpsa_monitor_offline_device(h, sd[i]->scsi3addr);
1961         }
1962
1963         /* Don't notify scsi mid layer of any changes the first time through
1964          * (or if there are no changes) scsi_scan_host will do it later the
1965          * first time through.
1966          */
1967         if (!changes)
1968                 goto free_and_out;
1969
1970         /* Notify scsi mid layer of any removed devices */
1971         for (i = 0; i < nremoved; i++) {
1972                 if (removed[i] == NULL)
1973                         continue;
1974                 if (removed[i]->expose_device)
1975                         hpsa_remove_device(h, removed[i]);
1976                 kfree(removed[i]);
1977                 removed[i] = NULL;
1978         }
1979
1980         /* Notify scsi mid layer of any added devices */
1981         for (i = 0; i < nadded; i++) {
1982                 int rc = 0;
1983
1984                 if (added[i] == NULL)
1985                         continue;
1986                 if (!(added[i]->expose_device))
1987                         continue;
1988                 rc = hpsa_add_device(h, added[i]);
1989                 if (!rc)
1990                         continue;
1991                 dev_warn(&h->pdev->dev,
1992                         "addition failed %d, device not added.", rc);
1993                 /* now we have to remove it from h->dev,
1994                  * since it didn't get added to scsi mid layer
1995                  */
1996                 fixup_botched_add(h, added[i]);
1997                 h->drv_req_rescan = 1;
1998         }
1999
2000 free_and_out:
2001         kfree(added);
2002         kfree(removed);
2003 }
2004
2005 /*
2006  * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
2007  * Assume's h->devlock is held.
2008  */
2009 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
2010         int bus, int target, int lun)
2011 {
2012         int i;
2013         struct hpsa_scsi_dev_t *sd;
2014
2015         for (i = 0; i < h->ndevices; i++) {
2016                 sd = h->dev[i];
2017                 if (sd->bus == bus && sd->target == target && sd->lun == lun)
2018                         return sd;
2019         }
2020         return NULL;
2021 }
2022
2023 static int hpsa_slave_alloc(struct scsi_device *sdev)
2024 {
2025         struct hpsa_scsi_dev_t *sd = NULL;
2026         unsigned long flags;
2027         struct ctlr_info *h;
2028
2029         h = sdev_to_hba(sdev);
2030         spin_lock_irqsave(&h->devlock, flags);
2031         if (sdev_channel(sdev) == HPSA_PHYSICAL_DEVICE_BUS) {
2032                 struct scsi_target *starget;
2033                 struct sas_rphy *rphy;
2034
2035                 starget = scsi_target(sdev);
2036                 rphy = target_to_rphy(starget);
2037                 sd = hpsa_find_device_by_sas_rphy(h, rphy);
2038                 if (sd) {
2039                         sd->target = sdev_id(sdev);
2040                         sd->lun = sdev->lun;
2041                 }
2042         }
2043         if (!sd)
2044                 sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
2045                                         sdev_id(sdev), sdev->lun);
2046
2047         if (sd && sd->expose_device) {
2048                 atomic_set(&sd->ioaccel_cmds_out, 0);
2049                 sdev->hostdata = sd;
2050         } else
2051                 sdev->hostdata = NULL;
2052         spin_unlock_irqrestore(&h->devlock, flags);
2053         return 0;
2054 }
2055
2056 /* configure scsi device based on internal per-device structure */
2057 static int hpsa_slave_configure(struct scsi_device *sdev)
2058 {
2059         struct hpsa_scsi_dev_t *sd;
2060         int queue_depth;
2061
2062         sd = sdev->hostdata;
2063         sdev->no_uld_attach = !sd || !sd->expose_device;
2064
2065         if (sd)
2066                 queue_depth = sd->queue_depth != 0 ?
2067                         sd->queue_depth : sdev->host->can_queue;
2068         else
2069                 queue_depth = sdev->host->can_queue;
2070
2071         scsi_change_queue_depth(sdev, queue_depth);
2072
2073         return 0;
2074 }
2075
2076 static void hpsa_slave_destroy(struct scsi_device *sdev)
2077 {
2078         /* nothing to do. */
2079 }
2080
2081 static void hpsa_free_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
2082 {
2083         int i;
2084
2085         if (!h->ioaccel2_cmd_sg_list)
2086                 return;
2087         for (i = 0; i < h->nr_cmds; i++) {
2088                 kfree(h->ioaccel2_cmd_sg_list[i]);
2089                 h->ioaccel2_cmd_sg_list[i] = NULL;
2090         }
2091         kfree(h->ioaccel2_cmd_sg_list);
2092         h->ioaccel2_cmd_sg_list = NULL;
2093 }
2094
2095 static int hpsa_allocate_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
2096 {
2097         int i;
2098
2099         if (h->chainsize <= 0)
2100                 return 0;
2101
2102         h->ioaccel2_cmd_sg_list =
2103                 kzalloc(sizeof(*h->ioaccel2_cmd_sg_list) * h->nr_cmds,
2104                                         GFP_KERNEL);
2105         if (!h->ioaccel2_cmd_sg_list)
2106                 return -ENOMEM;
2107         for (i = 0; i < h->nr_cmds; i++) {
2108                 h->ioaccel2_cmd_sg_list[i] =
2109                         kmalloc(sizeof(*h->ioaccel2_cmd_sg_list[i]) *
2110                                         h->maxsgentries, GFP_KERNEL);
2111                 if (!h->ioaccel2_cmd_sg_list[i])
2112                         goto clean;
2113         }
2114         return 0;
2115
2116 clean:
2117         hpsa_free_ioaccel2_sg_chain_blocks(h);
2118         return -ENOMEM;
2119 }
2120
2121 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
2122 {
2123         int i;
2124
2125         if (!h->cmd_sg_list)
2126                 return;
2127         for (i = 0; i < h->nr_cmds; i++) {
2128                 kfree(h->cmd_sg_list[i]);
2129                 h->cmd_sg_list[i] = NULL;
2130         }
2131         kfree(h->cmd_sg_list);
2132         h->cmd_sg_list = NULL;
2133 }
2134
2135 static int hpsa_alloc_sg_chain_blocks(struct ctlr_info *h)
2136 {
2137         int i;
2138
2139         if (h->chainsize <= 0)
2140                 return 0;
2141
2142         h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
2143                                 GFP_KERNEL);
2144         if (!h->cmd_sg_list)
2145                 return -ENOMEM;
2146
2147         for (i = 0; i < h->nr_cmds; i++) {
2148                 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
2149                                                 h->chainsize, GFP_KERNEL);
2150                 if (!h->cmd_sg_list[i])
2151                         goto clean;
2152
2153         }
2154         return 0;
2155
2156 clean:
2157         hpsa_free_sg_chain_blocks(h);
2158         return -ENOMEM;
2159 }
2160
2161 static int hpsa_map_ioaccel2_sg_chain_block(struct ctlr_info *h,
2162         struct io_accel2_cmd *cp, struct CommandList *c)
2163 {
2164         struct ioaccel2_sg_element *chain_block;
2165         u64 temp64;
2166         u32 chain_size;
2167
2168         chain_block = h->ioaccel2_cmd_sg_list[c->cmdindex];
2169         chain_size = le32_to_cpu(cp->sg[0].length);
2170         temp64 = pci_map_single(h->pdev, chain_block, chain_size,
2171                                 PCI_DMA_TODEVICE);
2172         if (dma_mapping_error(&h->pdev->dev, temp64)) {
2173                 /* prevent subsequent unmapping */
2174                 cp->sg->address = 0;
2175                 return -1;
2176         }
2177         cp->sg->address = cpu_to_le64(temp64);
2178         return 0;
2179 }
2180
2181 static void hpsa_unmap_ioaccel2_sg_chain_block(struct ctlr_info *h,
2182         struct io_accel2_cmd *cp)
2183 {
2184         struct ioaccel2_sg_element *chain_sg;
2185         u64 temp64;
2186         u32 chain_size;
2187
2188         chain_sg = cp->sg;
2189         temp64 = le64_to_cpu(chain_sg->address);
2190         chain_size = le32_to_cpu(cp->sg[0].length);
2191         pci_unmap_single(h->pdev, temp64, chain_size, PCI_DMA_TODEVICE);
2192 }
2193
2194 static int hpsa_map_sg_chain_block(struct ctlr_info *h,
2195         struct CommandList *c)
2196 {
2197         struct SGDescriptor *chain_sg, *chain_block;
2198         u64 temp64;
2199         u32 chain_len;
2200
2201         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2202         chain_block = h->cmd_sg_list[c->cmdindex];
2203         chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
2204         chain_len = sizeof(*chain_sg) *
2205                 (le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
2206         chain_sg->Len = cpu_to_le32(chain_len);
2207         temp64 = pci_map_single(h->pdev, chain_block, chain_len,
2208                                 PCI_DMA_TODEVICE);
2209         if (dma_mapping_error(&h->pdev->dev, temp64)) {
2210                 /* prevent subsequent unmapping */
2211                 chain_sg->Addr = cpu_to_le64(0);
2212                 return -1;
2213         }
2214         chain_sg->Addr = cpu_to_le64(temp64);
2215         return 0;
2216 }
2217
2218 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
2219         struct CommandList *c)
2220 {
2221         struct SGDescriptor *chain_sg;
2222
2223         if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
2224                 return;
2225
2226         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2227         pci_unmap_single(h->pdev, le64_to_cpu(chain_sg->Addr),
2228                         le32_to_cpu(chain_sg->Len), PCI_DMA_TODEVICE);
2229 }
2230
2231
2232 /* Decode the various types of errors on ioaccel2 path.
2233  * Return 1 for any error that should generate a RAID path retry.
2234  * Return 0 for errors that don't require a RAID path retry.
2235  */
2236 static int handle_ioaccel_mode2_error(struct ctlr_info *h,
2237                                         struct CommandList *c,
2238                                         struct scsi_cmnd *cmd,
2239                                         struct io_accel2_cmd *c2,
2240                                         struct hpsa_scsi_dev_t *dev)
2241 {
2242         int data_len;
2243         int retry = 0;
2244         u32 ioaccel2_resid = 0;
2245
2246         switch (c2->error_data.serv_response) {
2247         case IOACCEL2_SERV_RESPONSE_COMPLETE:
2248                 switch (c2->error_data.status) {
2249                 case IOACCEL2_STATUS_SR_TASK_COMP_GOOD:
2250                         break;
2251                 case IOACCEL2_STATUS_SR_TASK_COMP_CHK_COND:
2252                         cmd->result |= SAM_STAT_CHECK_CONDITION;
2253                         if (c2->error_data.data_present !=
2254                                         IOACCEL2_SENSE_DATA_PRESENT) {
2255                                 memset(cmd->sense_buffer, 0,
2256                                         SCSI_SENSE_BUFFERSIZE);
2257                                 break;
2258                         }
2259                         /* copy the sense data */
2260                         data_len = c2->error_data.sense_data_len;
2261                         if (data_len > SCSI_SENSE_BUFFERSIZE)
2262                                 data_len = SCSI_SENSE_BUFFERSIZE;
2263                         if (data_len > sizeof(c2->error_data.sense_data_buff))
2264                                 data_len =
2265                                         sizeof(c2->error_data.sense_data_buff);
2266                         memcpy(cmd->sense_buffer,
2267                                 c2->error_data.sense_data_buff, data_len);
2268                         retry = 1;
2269                         break;
2270                 case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
2271                         retry = 1;
2272                         break;
2273                 case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
2274                         retry = 1;
2275                         break;
2276                 case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
2277                         retry = 1;
2278                         break;
2279                 case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
2280                         retry = 1;
2281                         break;
2282                 default:
2283                         retry = 1;
2284                         break;
2285                 }
2286                 break;
2287         case IOACCEL2_SERV_RESPONSE_FAILURE:
2288                 switch (c2->error_data.status) {
2289                 case IOACCEL2_STATUS_SR_IO_ERROR:
2290                 case IOACCEL2_STATUS_SR_IO_ABORTED:
2291                 case IOACCEL2_STATUS_SR_OVERRUN:
2292                         retry = 1;
2293                         break;
2294                 case IOACCEL2_STATUS_SR_UNDERRUN:
2295                         cmd->result = (DID_OK << 16);           /* host byte */
2296                         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
2297                         ioaccel2_resid = get_unaligned_le32(
2298                                                 &c2->error_data.resid_cnt[0]);
2299                         scsi_set_resid(cmd, ioaccel2_resid);
2300                         break;
2301                 case IOACCEL2_STATUS_SR_NO_PATH_TO_DEVICE:
2302                 case IOACCEL2_STATUS_SR_INVALID_DEVICE:
2303                 case IOACCEL2_STATUS_SR_IOACCEL_DISABLED:
2304                         /*
2305                          * Did an HBA disk disappear? We will eventually
2306                          * get a state change event from the controller but
2307                          * in the meantime, we need to tell the OS that the
2308                          * HBA disk is no longer there and stop I/O
2309                          * from going down. This allows the potential re-insert
2310                          * of the disk to get the same device node.
2311                          */
2312                         if (dev->physical_device && dev->expose_device) {
2313                                 cmd->result = DID_NO_CONNECT << 16;
2314                                 dev->removed = 1;
2315                                 h->drv_req_rescan = 1;
2316                                 dev_warn(&h->pdev->dev,
2317                                         "%s: device is gone!\n", __func__);
2318                         } else
2319                                 /*
2320                                  * Retry by sending down the RAID path.
2321                                  * We will get an event from ctlr to
2322                                  * trigger rescan regardless.
2323                                  */
2324                                 retry = 1;
2325                         break;
2326                 default:
2327                         retry = 1;
2328                 }
2329                 break;
2330         case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
2331                 break;
2332         case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
2333                 break;
2334         case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
2335                 retry = 1;
2336                 break;
2337         case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
2338                 break;
2339         default:
2340                 retry = 1;
2341                 break;
2342         }
2343
2344         return retry;   /* retry on raid path? */
2345 }
2346
2347 static void hpsa_cmd_resolve_events(struct ctlr_info *h,
2348                 struct CommandList *c)
2349 {
2350         bool do_wake = false;
2351
2352         /*
2353          * Prevent the following race in the abort handler:
2354          *
2355          * 1. LLD is requested to abort a SCSI command
2356          * 2. The SCSI command completes
2357          * 3. The struct CommandList associated with step 2 is made available
2358          * 4. New I/O request to LLD to another LUN re-uses struct CommandList
2359          * 5. Abort handler follows scsi_cmnd->host_scribble and
2360          *    finds struct CommandList and tries to aborts it
2361          * Now we have aborted the wrong command.
2362          *
2363          * Reset c->scsi_cmd here so that the abort or reset handler will know
2364          * this command has completed.  Then, check to see if the handler is
2365          * waiting for this command, and, if so, wake it.
2366          */
2367         c->scsi_cmd = SCSI_CMD_IDLE;
2368         mb();   /* Declare command idle before checking for pending events. */
2369         if (c->abort_pending) {
2370                 do_wake = true;
2371                 c->abort_pending = false;
2372         }
2373         if (c->reset_pending) {
2374                 unsigned long flags;
2375                 struct hpsa_scsi_dev_t *dev;
2376
2377                 /*
2378                  * There appears to be a reset pending; lock the lock and
2379                  * reconfirm.  If so, then decrement the count of outstanding
2380                  * commands and wake the reset command if this is the last one.
2381                  */
2382                 spin_lock_irqsave(&h->lock, flags);
2383                 dev = c->reset_pending;         /* Re-fetch under the lock. */
2384                 if (dev && atomic_dec_and_test(&dev->reset_cmds_out))
2385                         do_wake = true;
2386                 c->reset_pending = NULL;
2387                 spin_unlock_irqrestore(&h->lock, flags);
2388         }
2389
2390         if (do_wake)
2391                 wake_up_all(&h->event_sync_wait_queue);
2392 }
2393
2394 static void hpsa_cmd_resolve_and_free(struct ctlr_info *h,
2395                                       struct CommandList *c)
2396 {
2397         hpsa_cmd_resolve_events(h, c);
2398         cmd_tagged_free(h, c);
2399 }
2400
2401 static void hpsa_cmd_free_and_done(struct ctlr_info *h,
2402                 struct CommandList *c, struct scsi_cmnd *cmd)
2403 {
2404         hpsa_cmd_resolve_and_free(h, c);
2405         if (cmd && cmd->scsi_done)
2406                 cmd->scsi_done(cmd);
2407 }
2408
2409 static void hpsa_retry_cmd(struct ctlr_info *h, struct CommandList *c)
2410 {
2411         INIT_WORK(&c->work, hpsa_command_resubmit_worker);
2412         queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
2413 }
2414
2415 static void hpsa_set_scsi_cmd_aborted(struct scsi_cmnd *cmd)
2416 {
2417         cmd->result = DID_ABORT << 16;
2418 }
2419
2420 static void hpsa_cmd_abort_and_free(struct ctlr_info *h, struct CommandList *c,
2421                                     struct scsi_cmnd *cmd)
2422 {
2423         hpsa_set_scsi_cmd_aborted(cmd);
2424         dev_warn(&h->pdev->dev, "CDB %16phN was aborted with status 0x%x\n",
2425                          c->Request.CDB, c->err_info->ScsiStatus);
2426         hpsa_cmd_resolve_and_free(h, c);
2427 }
2428
2429 static void process_ioaccel2_completion(struct ctlr_info *h,
2430                 struct CommandList *c, struct scsi_cmnd *cmd,
2431                 struct hpsa_scsi_dev_t *dev)
2432 {
2433         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
2434
2435         /* check for good status */
2436         if (likely(c2->error_data.serv_response == 0 &&
2437                         c2->error_data.status == 0))
2438                 return hpsa_cmd_free_and_done(h, c, cmd);
2439
2440         /*
2441          * Any RAID offload error results in retry which will use
2442          * the normal I/O path so the controller can handle whatever's
2443          * wrong.
2444          */
2445         if (is_logical_device(dev) &&
2446                 c2->error_data.serv_response ==
2447                         IOACCEL2_SERV_RESPONSE_FAILURE) {
2448                 if (c2->error_data.status ==
2449                         IOACCEL2_STATUS_SR_IOACCEL_DISABLED) {
2450                         dev->offload_enabled = 0;
2451                         dev->offload_to_be_enabled = 0;
2452                 }
2453
2454                 return hpsa_retry_cmd(h, c);
2455         }
2456
2457         if (handle_ioaccel_mode2_error(h, c, cmd, c2, dev))
2458                 return hpsa_retry_cmd(h, c);
2459
2460         return hpsa_cmd_free_and_done(h, c, cmd);
2461 }
2462
2463 /* Returns 0 on success, < 0 otherwise. */
2464 static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
2465                                         struct CommandList *cp)
2466 {
2467         u8 tmf_status = cp->err_info->ScsiStatus;
2468
2469         switch (tmf_status) {
2470         case CISS_TMF_COMPLETE:
2471                 /*
2472                  * CISS_TMF_COMPLETE never happens, instead,
2473                  * ei->CommandStatus == 0 for this case.
2474                  */
2475         case CISS_TMF_SUCCESS:
2476                 return 0;
2477         case CISS_TMF_INVALID_FRAME:
2478         case CISS_TMF_NOT_SUPPORTED:
2479         case CISS_TMF_FAILED:
2480         case CISS_TMF_WRONG_LUN:
2481         case CISS_TMF_OVERLAPPED_TAG:
2482                 break;
2483         default:
2484                 dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
2485                                 tmf_status);
2486                 break;
2487         }
2488         return -tmf_status;
2489 }
2490
2491 static void complete_scsi_command(struct CommandList *cp)
2492 {
2493         struct scsi_cmnd *cmd;
2494         struct ctlr_info *h;
2495         struct ErrorInfo *ei;
2496         struct hpsa_scsi_dev_t *dev;
2497         struct io_accel2_cmd *c2;
2498
2499         u8 sense_key;
2500         u8 asc;      /* additional sense code */
2501         u8 ascq;     /* additional sense code qualifier */
2502         unsigned long sense_data_size;
2503
2504         ei = cp->err_info;
2505         cmd = cp->scsi_cmd;
2506         h = cp->h;
2507
2508         if (!cmd->device) {
2509                 cmd->result = DID_NO_CONNECT << 16;
2510                 return hpsa_cmd_free_and_done(h, cp, cmd);
2511         }
2512
2513         dev = cmd->device->hostdata;
2514         if (!dev) {
2515                 cmd->result = DID_NO_CONNECT << 16;
2516                 return hpsa_cmd_free_and_done(h, cp, cmd);
2517         }
2518         c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
2519
2520         scsi_dma_unmap(cmd); /* undo the DMA mappings */
2521         if ((cp->cmd_type == CMD_SCSI) &&
2522                 (le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
2523                 hpsa_unmap_sg_chain_block(h, cp);
2524
2525         if ((cp->cmd_type == CMD_IOACCEL2) &&
2526                 (c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
2527                 hpsa_unmap_ioaccel2_sg_chain_block(h, c2);
2528
2529         cmd->result = (DID_OK << 16);           /* host byte */
2530         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
2531
2532         if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1) {
2533                 if (dev->physical_device && dev->expose_device &&
2534                         dev->removed) {
2535                         cmd->result = DID_NO_CONNECT << 16;
2536                         return hpsa_cmd_free_and_done(h, cp, cmd);
2537                 }
2538                 if (likely(cp->phys_disk != NULL))
2539                         atomic_dec(&cp->phys_disk->ioaccel_cmds_out);
2540         }
2541
2542         /*
2543          * We check for lockup status here as it may be set for
2544          * CMD_SCSI, CMD_IOACCEL1 and CMD_IOACCEL2 commands by
2545          * fail_all_oustanding_cmds()
2546          */
2547         if (unlikely(ei->CommandStatus == CMD_CTLR_LOCKUP)) {
2548                 /* DID_NO_CONNECT will prevent a retry */
2549                 cmd->result = DID_NO_CONNECT << 16;
2550                 return hpsa_cmd_free_and_done(h, cp, cmd);
2551         }
2552
2553         if ((unlikely(hpsa_is_pending_event(cp)))) {
2554                 if (cp->reset_pending)
2555                         return hpsa_cmd_free_and_done(h, cp, cmd);
2556                 if (cp->abort_pending)
2557                         return hpsa_cmd_abort_and_free(h, cp, cmd);
2558         }
2559
2560         if (cp->cmd_type == CMD_IOACCEL2)
2561                 return process_ioaccel2_completion(h, cp, cmd, dev);
2562
2563         scsi_set_resid(cmd, ei->ResidualCnt);
2564         if (ei->CommandStatus == 0)
2565                 return hpsa_cmd_free_and_done(h, cp, cmd);
2566
2567         /* For I/O accelerator commands, copy over some fields to the normal
2568          * CISS header used below for error handling.
2569          */
2570         if (cp->cmd_type == CMD_IOACCEL1) {
2571                 struct io_accel1_cmd *c = &h->ioaccel_cmd_pool[cp->cmdindex];
2572                 cp->Header.SGList = scsi_sg_count(cmd);
2573                 cp->Header.SGTotal = cpu_to_le16(cp->Header.SGList);
2574                 cp->Request.CDBLen = le16_to_cpu(c->io_flags) &
2575                         IOACCEL1_IOFLAGS_CDBLEN_MASK;
2576                 cp->Header.tag = c->tag;
2577                 memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
2578                 memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);
2579
2580                 /* Any RAID offload error results in retry which will use
2581                  * the normal I/O path so the controller can handle whatever's
2582                  * wrong.
2583                  */
2584                 if (is_logical_device(dev)) {
2585                         if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
2586                                 dev->offload_enabled = 0;
2587                         return hpsa_retry_cmd(h, cp);
2588                 }
2589         }
2590
2591         /* an error has occurred */
2592         switch (ei->CommandStatus) {
2593
2594         case CMD_TARGET_STATUS:
2595                 cmd->result |= ei->ScsiStatus;
2596                 /* copy the sense data */
2597                 if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
2598                         sense_data_size = SCSI_SENSE_BUFFERSIZE;
2599                 else
2600                         sense_data_size = sizeof(ei->SenseInfo);
2601                 if (ei->SenseLen < sense_data_size)
2602                         sense_data_size = ei->SenseLen;
2603                 memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
2604                 if (ei->ScsiStatus)
2605                         decode_sense_data(ei->SenseInfo, sense_data_size,
2606                                 &sense_key, &asc, &ascq);
2607                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
2608                         if (sense_key == ABORTED_COMMAND) {
2609                                 cmd->result |= DID_SOFT_ERROR << 16;
2610                                 break;
2611                         }
2612                         break;
2613                 }
2614                 /* Problem was not a check condition
2615                  * Pass it up to the upper layers...
2616                  */
2617                 if (ei->ScsiStatus) {
2618                         dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
2619                                 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
2620                                 "Returning result: 0x%x\n",
2621                                 cp, ei->ScsiStatus,
2622                                 sense_key, asc, ascq,
2623                                 cmd->result);
2624                 } else {  /* scsi status is zero??? How??? */
2625                         dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
2626                                 "Returning no connection.\n", cp),
2627
2628                         /* Ordinarily, this case should never happen,
2629                          * but there is a bug in some released firmware
2630                          * revisions that allows it to happen if, for
2631                          * example, a 4100 backplane loses power and
2632                          * the tape drive is in it.  We assume that
2633                          * it's a fatal error of some kind because we
2634                          * can't show that it wasn't. We will make it
2635                          * look like selection timeout since that is
2636                          * the most common reason for this to occur,
2637                          * and it's severe enough.
2638                          */
2639
2640                         cmd->result = DID_NO_CONNECT << 16;
2641                 }
2642                 break;
2643
2644         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
2645                 break;
2646         case CMD_DATA_OVERRUN:
2647                 dev_warn(&h->pdev->dev,
2648                         "CDB %16phN data overrun\n", cp->Request.CDB);
2649                 break;
2650         case CMD_INVALID: {
2651                 /* print_bytes(cp, sizeof(*cp), 1, 0);
2652                 print_cmd(cp); */
2653                 /* We get CMD_INVALID if you address a non-existent device
2654                  * instead of a selection timeout (no response).  You will
2655                  * see this if you yank out a drive, then try to access it.
2656                  * This is kind of a shame because it means that any other
2657                  * CMD_INVALID (e.g. driver bug) will get interpreted as a
2658                  * missing target. */
2659                 cmd->result = DID_NO_CONNECT << 16;
2660         }
2661                 break;
2662         case CMD_PROTOCOL_ERR:
2663                 cmd->result = DID_ERROR << 16;
2664                 dev_warn(&h->pdev->dev, "CDB %16phN : protocol error\n",
2665                                 cp->Request.CDB);
2666                 break;
2667         case CMD_HARDWARE_ERR:
2668                 cmd->result = DID_ERROR << 16;
2669                 dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
2670                         cp->Request.CDB);
2671                 break;
2672         case CMD_CONNECTION_LOST:
2673                 cmd->result = DID_ERROR << 16;
2674                 dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
2675                         cp->Request.CDB);
2676                 break;
2677         case CMD_ABORTED:
2678                 /* Return now to avoid calling scsi_done(). */
2679                 return hpsa_cmd_abort_and_free(h, cp, cmd);
2680         case CMD_ABORT_FAILED:
2681                 cmd->result = DID_ERROR << 16;
2682                 dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
2683                         cp->Request.CDB);
2684                 break;
2685         case CMD_UNSOLICITED_ABORT:
2686                 cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
2687                 dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
2688                         cp->Request.CDB);
2689                 break;
2690         case CMD_TIMEOUT:
2691                 cmd->result = DID_TIME_OUT << 16;
2692                 dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
2693                         cp->Request.CDB);
2694                 break;
2695         case CMD_UNABORTABLE:
2696                 cmd->result = DID_ERROR << 16;
2697                 dev_warn(&h->pdev->dev, "Command unabortable\n");
2698                 break;
2699         case CMD_TMF_STATUS:
2700                 if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
2701                         cmd->result = DID_ERROR << 16;
2702                 break;
2703         case CMD_IOACCEL_DISABLED:
2704                 /* This only handles the direct pass-through case since RAID
2705                  * offload is handled above.  Just attempt a retry.
2706                  */
2707                 cmd->result = DID_SOFT_ERROR << 16;
2708                 dev_warn(&h->pdev->dev,
2709                                 "cp %p had HP SSD Smart Path error\n", cp);
2710                 break;
2711         default:
2712                 cmd->result = DID_ERROR << 16;
2713                 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
2714                                 cp, ei->CommandStatus);
2715         }
2716
2717         return hpsa_cmd_free_and_done(h, cp, cmd);
2718 }
2719
2720 static void hpsa_pci_unmap(struct pci_dev *pdev,
2721         struct CommandList *c, int sg_used, int data_direction)
2722 {
2723         int i;
2724
2725         for (i = 0; i < sg_used; i++)
2726                 pci_unmap_single(pdev, (dma_addr_t) le64_to_cpu(c->SG[i].Addr),
2727                                 le32_to_cpu(c->SG[i].Len),
2728                                 data_direction);
2729 }
2730
2731 static int hpsa_map_one(struct pci_dev *pdev,
2732                 struct CommandList *cp,
2733                 unsigned char *buf,
2734                 size_t buflen,
2735                 int data_direction)
2736 {
2737         u64 addr64;
2738
2739         if (buflen == 0 || data_direction == PCI_DMA_NONE) {
2740                 cp->Header.SGList = 0;
2741                 cp->Header.SGTotal = cpu_to_le16(0);
2742                 return 0;
2743         }
2744
2745         addr64 = pci_map_single(pdev, buf, buflen, data_direction);
2746         if (dma_mapping_error(&pdev->dev, addr64)) {
2747                 /* Prevent subsequent unmap of something never mapped */
2748                 cp->Header.SGList = 0;
2749                 cp->Header.SGTotal = cpu_to_le16(0);
2750                 return -1;
2751         }
2752         cp->SG[0].Addr = cpu_to_le64(addr64);
2753         cp->SG[0].Len = cpu_to_le32(buflen);
2754         cp->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* we are not chaining */
2755         cp->Header.SGList = 1;   /* no. SGs contig in this cmd */
2756         cp->Header.SGTotal = cpu_to_le16(1); /* total sgs in cmd list */
2757         return 0;
2758 }
2759
2760 #define NO_TIMEOUT ((unsigned long) -1)
2761 #define DEFAULT_TIMEOUT 30000 /* milliseconds */
2762 static int hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
2763         struct CommandList *c, int reply_queue, unsigned long timeout_msecs)
2764 {
2765         DECLARE_COMPLETION_ONSTACK(wait);
2766
2767         c->waiting = &wait;
2768         __enqueue_cmd_and_start_io(h, c, reply_queue);
2769         if (timeout_msecs == NO_TIMEOUT) {
2770                 /* TODO: get rid of this no-timeout thing */
2771                 wait_for_completion_io(&wait);
2772                 return IO_OK;
2773         }
2774         if (!wait_for_completion_io_timeout(&wait,
2775                                         msecs_to_jiffies(timeout_msecs))) {
2776                 dev_warn(&h->pdev->dev, "Command timed out.\n");
2777                 return -ETIMEDOUT;
2778         }
2779         return IO_OK;
2780 }
2781
2782 static int hpsa_scsi_do_simple_cmd(struct ctlr_info *h, struct CommandList *c,
2783                                    int reply_queue, unsigned long timeout_msecs)
2784 {
2785         if (unlikely(lockup_detected(h))) {
2786                 c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
2787                 return IO_OK;
2788         }
2789         return hpsa_scsi_do_simple_cmd_core(h, c, reply_queue, timeout_msecs);
2790 }
2791
2792 static u32 lockup_detected(struct ctlr_info *h)
2793 {
2794         int cpu;
2795         u32 rc, *lockup_detected;
2796
2797         cpu = get_cpu();
2798         lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
2799         rc = *lockup_detected;
2800         put_cpu();
2801         return rc;
2802 }
2803
2804 #define MAX_DRIVER_CMD_RETRIES 25
2805 static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
2806         struct CommandList *c, int data_direction, unsigned long timeout_msecs)
2807 {
2808         int backoff_time = 10, retry_count = 0;
2809         int rc;
2810
2811         do {
2812                 memset(c->err_info, 0, sizeof(*c->err_info));
2813                 rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
2814                                                   timeout_msecs);
2815                 if (rc)
2816                         break;
2817                 retry_count++;
2818                 if (retry_count > 3) {
2819                         msleep(backoff_time);
2820                         if (backoff_time < 1000)
2821                                 backoff_time *= 2;
2822                 }
2823         } while ((check_for_unit_attention(h, c) ||
2824                         check_for_busy(h, c)) &&
2825                         retry_count <= MAX_DRIVER_CMD_RETRIES);
2826         hpsa_pci_unmap(h->pdev, c, 1, data_direction);
2827         if (retry_count > MAX_DRIVER_CMD_RETRIES)
2828                 rc = -EIO;
2829         return rc;
2830 }
2831
2832 static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
2833                                 struct CommandList *c)
2834 {
2835         const u8 *cdb = c->Request.CDB;
2836         const u8 *lun = c->Header.LUN.LunAddrBytes;
2837
2838         dev_warn(&h->pdev->dev, "%s: LUN:%8phN CDB:%16phN\n",
2839                  txt, lun, cdb);
2840 }
2841
2842 static void hpsa_scsi_interpret_error(struct ctlr_info *h,
2843                         struct CommandList *cp)
2844 {
2845         const struct ErrorInfo *ei = cp->err_info;
2846         struct device *d = &cp->h->pdev->dev;
2847         u8 sense_key, asc, ascq;
2848         int sense_len;
2849
2850         switch (ei->CommandStatus) {
2851         case CMD_TARGET_STATUS:
2852                 if (ei->SenseLen > sizeof(ei->SenseInfo))
2853                         sense_len = sizeof(ei->SenseInfo);
2854                 else
2855                         sense_len = ei->SenseLen;
2856                 decode_sense_data(ei->SenseInfo, sense_len,
2857                                         &sense_key, &asc, &ascq);
2858                 hpsa_print_cmd(h, "SCSI status", cp);
2859                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
2860                         dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
2861                                 sense_key, asc, ascq);
2862                 else
2863                         dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
2864                 if (ei->ScsiStatus == 0)
2865                         dev_warn(d, "SCSI status is abnormally zero.  "
2866                         "(probably indicates selection timeout "
2867                         "reported incorrectly due to a known "
2868                         "firmware bug, circa July, 2001.)\n");
2869                 break;
2870         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
2871                 break;
2872         case CMD_DATA_OVERRUN:
2873                 hpsa_print_cmd(h, "overrun condition", cp);
2874                 break;
2875         case CMD_INVALID: {
2876                 /* controller unfortunately reports SCSI passthru's
2877                  * to non-existent targets as invalid commands.
2878                  */
2879                 hpsa_print_cmd(h, "invalid command", cp);
2880                 dev_warn(d, "probably means device no longer present\n");
2881                 }
2882                 break;
2883         case CMD_PROTOCOL_ERR:
2884                 hpsa_print_cmd(h, "protocol error", cp);
2885                 break;
2886         case CMD_HARDWARE_ERR:
2887                 hpsa_print_cmd(h, "hardware error", cp);
2888                 break;
2889         case CMD_CONNECTION_LOST:
2890                 hpsa_print_cmd(h, "connection lost", cp);
2891                 break;
2892         case CMD_ABORTED:
2893                 hpsa_print_cmd(h, "aborted", cp);
2894                 break;
2895         case CMD_ABORT_FAILED:
2896                 hpsa_print_cmd(h, "abort failed", cp);
2897                 break;
2898         case CMD_UNSOLICITED_ABORT:
2899                 hpsa_print_cmd(h, "unsolicited abort", cp);
2900                 break;
2901         case CMD_TIMEOUT:
2902                 hpsa_print_cmd(h, "timed out", cp);
2903                 break;
2904         case CMD_UNABORTABLE:
2905                 hpsa_print_cmd(h, "unabortable", cp);
2906                 break;
2907         case CMD_CTLR_LOCKUP:
2908                 hpsa_print_cmd(h, "controller lockup detected", cp);
2909                 break;
2910         default:
2911                 hpsa_print_cmd(h, "unknown status", cp);
2912                 dev_warn(d, "Unknown command status %x\n",
2913                                 ei->CommandStatus);
2914         }
2915 }
2916
2917 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
2918                         u16 page, unsigned char *buf,
2919                         unsigned char bufsize)
2920 {
2921         int rc = IO_OK;
2922         struct CommandList *c;
2923         struct ErrorInfo *ei;
2924
2925         c = cmd_alloc(h);
2926
2927         if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
2928                         page, scsi3addr, TYPE_CMD)) {
2929                 rc = -1;
2930                 goto out;
2931         }
2932         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
2933                                         PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
2934         if (rc)
2935                 goto out;
2936         ei = c->err_info;
2937         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
2938                 hpsa_scsi_interpret_error(h, c);
2939                 rc = -1;
2940         }
2941 out:
2942         cmd_free(h, c);
2943         return rc;
2944 }
2945
2946 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr,
2947         u8 reset_type, int reply_queue)
2948 {
2949         int rc = IO_OK;
2950         struct CommandList *c;
2951         struct ErrorInfo *ei;
2952
2953         c = cmd_alloc(h);
2954
2955
2956         /* fill_cmd can't fail here, no data buffer to map. */
2957         (void) fill_cmd(c, reset_type, h, NULL, 0, 0,
2958                         scsi3addr, TYPE_MSG);
2959         rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
2960         if (rc) {
2961                 dev_warn(&h->pdev->dev, "Failed to send reset command\n");
2962                 goto out;
2963         }
2964         /* no unmap needed here because no data xfer. */
2965
2966         ei = c->err_info;
2967         if (ei->CommandStatus != 0) {
2968                 hpsa_scsi_interpret_error(h, c);
2969                 rc = -1;
2970         }
2971 out:
2972         cmd_free(h, c);
2973         return rc;
2974 }
2975
2976 static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
2977                                struct hpsa_scsi_dev_t *dev,
2978                                unsigned char *scsi3addr)
2979 {
2980         int i;
2981         bool match = false;
2982         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
2983         struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;
2984
2985         if (hpsa_is_cmd_idle(c))
2986                 return false;
2987
2988         switch (c->cmd_type) {
2989         case CMD_SCSI:
2990         case CMD_IOCTL_PEND:
2991                 match = !memcmp(scsi3addr, &c->Header.LUN.LunAddrBytes,
2992                                 sizeof(c->Header.LUN.LunAddrBytes));
2993                 break;
2994
2995         case CMD_IOACCEL1:
2996         case CMD_IOACCEL2:
2997                 if (c->phys_disk == dev) {
2998                         /* HBA mode match */
2999                         match = true;
3000                 } else {
3001                         /* Possible RAID mode -- check each phys dev. */
3002                         /* FIXME:  Do we need to take out a lock here?  If
3003                          * so, we could just call hpsa_get_pdisk_of_ioaccel2()
3004                          * instead. */
3005                         for (i = 0; i < dev->nphysical_disks && !match; i++) {
3006                                 /* FIXME: an alternate test might be
3007                                  *
3008                                  * match = dev->phys_disk[i]->ioaccel_handle
3009                                  *              == c2->scsi_nexus;      */
3010                                 match = dev->phys_disk[i] == c->phys_disk;
3011                         }
3012                 }
3013                 break;
3014
3015         case IOACCEL2_TMF:
3016                 for (i = 0; i < dev->nphysical_disks && !match; i++) {
3017                         match = dev->phys_disk[i]->ioaccel_handle ==
3018                                         le32_to_cpu(ac->it_nexus);
3019                 }
3020                 break;
3021
3022         case 0:         /* The command is in the middle of being initialized. */
3023                 match = false;
3024                 break;
3025
3026         default:
3027                 dev_err(&h->pdev->dev, "unexpected cmd_type: %d\n",
3028                         c->cmd_type);
3029                 BUG();
3030         }
3031
3032         return match;
3033 }
3034
3035 static int hpsa_do_reset(struct ctlr_info *h, struct hpsa_scsi_dev_t *dev,
3036         unsigned char *scsi3addr, u8 reset_type, int reply_queue)
3037 {
3038         int i;
3039         int rc = 0;
3040
3041         /* We can really only handle one reset at a time */
3042         if (mutex_lock_interruptible(&h->reset_mutex) == -EINTR) {
3043                 dev_warn(&h->pdev->dev, "concurrent reset wait interrupted.\n");
3044                 return -EINTR;
3045         }
3046
3047         BUG_ON(atomic_read(&dev->reset_cmds_out) != 0);
3048
3049         for (i = 0; i < h->nr_cmds; i++) {
3050                 struct CommandList *c = h->cmd_pool + i;
3051                 int refcount = atomic_inc_return(&c->refcount);
3052
3053                 if (refcount > 1 && hpsa_cmd_dev_match(h, c, dev, scsi3addr)) {
3054                         unsigned long flags;
3055
3056                         /*
3057                          * Mark the target command as having a reset pending,
3058                          * then lock a lock so that the command cannot complete
3059                          * while we're considering it.  If the command is not
3060                          * idle then count it; otherwise revoke the event.
3061                          */
3062                         c->reset_pending = dev;
3063                         spin_lock_irqsave(&h->lock, flags);     /* Implied MB */
3064                         if (!hpsa_is_cmd_idle(c))
3065                                 atomic_inc(&dev->reset_cmds_out);
3066                         else
3067                                 c->reset_pending = NULL;
3068                         spin_unlock_irqrestore(&h->lock, flags);
3069                 }
3070
3071                 cmd_free(h, c);
3072         }
3073
3074         rc = hpsa_send_reset(h, scsi3addr, reset_type, reply_queue);
3075         if (!rc)
3076                 wait_event(h->event_sync_wait_queue,
3077                         atomic_read(&dev->reset_cmds_out) == 0 ||
3078                         lockup_detected(h));
3079
3080         if (unlikely(lockup_detected(h))) {
3081                 dev_warn(&h->pdev->dev,
3082                          "Controller lockup detected during reset wait\n");
3083                 rc = -ENODEV;
3084         }
3085
3086         if (unlikely(rc))
3087                 atomic_set(&dev->reset_cmds_out, 0);
3088         else
3089                 wait_for_device_to_become_ready(h, scsi3addr, 0);
3090
3091         mutex_unlock(&h->reset_mutex);
3092         return rc;
3093 }
3094
3095 static void hpsa_get_raid_level(struct ctlr_info *h,
3096         unsigned char *scsi3addr, unsigned char *raid_level)
3097 {
3098         int rc;
3099         unsigned char *buf;
3100
3101         *raid_level = RAID_UNKNOWN;
3102         buf = kzalloc(64, GFP_KERNEL);
3103         if (!buf)
3104                 return;
3105
3106         if (!hpsa_vpd_page_supported(h, scsi3addr,
3107                 HPSA_VPD_LV_DEVICE_GEOMETRY))
3108                 goto exit;
3109
3110         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
3111                 HPSA_VPD_LV_DEVICE_GEOMETRY, buf, 64);
3112
3113         if (rc == 0)
3114                 *raid_level = buf[8];
3115         if (*raid_level > RAID_UNKNOWN)
3116                 *raid_level = RAID_UNKNOWN;
3117 exit:
3118         kfree(buf);
3119         return;
3120 }
3121
3122 #define HPSA_MAP_DEBUG
3123 #ifdef HPSA_MAP_DEBUG
3124 static void hpsa_debug_map_buff(struct ctlr_info *h, int rc,
3125                                 struct raid_map_data *map_buff)
3126 {
3127         struct raid_map_disk_data *dd = &map_buff->data[0];
3128         int map, row, col;
3129         u16 map_cnt, row_cnt, disks_per_row;
3130
3131         if (rc != 0)
3132                 return;
3133
3134         /* Show details only if debugging has been activated. */
3135         if (h->raid_offload_debug < 2)
3136                 return;
3137
3138         dev_info(&h->pdev->dev, "structure_size = %u\n",
3139                                 le32_to_cpu(map_buff->structure_size));
3140         dev_info(&h->pdev->dev, "volume_blk_size = %u\n",
3141                         le32_to_cpu(map_buff->volume_blk_size));
3142         dev_info(&h->pdev->dev, "volume_blk_cnt = 0x%llx\n",
3143                         le64_to_cpu(map_buff->volume_blk_cnt));
3144         dev_info(&h->pdev->dev, "physicalBlockShift = %u\n",
3145                         map_buff->phys_blk_shift);
3146         dev_info(&h->pdev->dev, "parity_rotation_shift = %u\n",
3147                         map_buff->parity_rotation_shift);
3148         dev_info(&h->pdev->dev, "strip_size = %u\n",
3149                         le16_to_cpu(map_buff->strip_size));
3150         dev_info(&h->pdev->dev, "disk_starting_blk = 0x%llx\n",
3151                         le64_to_cpu(map_buff->disk_starting_blk));
3152         dev_info(&h->pdev->dev, "disk_blk_cnt = 0x%llx\n",
3153                         le64_to_cpu(map_buff->disk_blk_cnt));
3154         dev_info(&h->pdev->dev, "data_disks_per_row = %u\n",
3155                         le16_to_cpu(map_buff->data_disks_per_row));
3156         dev_info(&h->pdev->dev, "metadata_disks_per_row = %u\n",
3157                         le16_to_cpu(map_buff->metadata_disks_per_row));
3158         dev_info(&h->pdev->dev, "row_cnt = %u\n",
3159                         le16_to_cpu(map_buff->row_cnt));
3160         dev_info(&h->pdev->dev, "layout_map_count = %u\n",
3161                         le16_to_cpu(map_buff->layout_map_count));
3162         dev_info(&h->pdev->dev, "flags = 0x%x\n",
3163                         le16_to_cpu(map_buff->flags));
3164         dev_info(&h->pdev->dev, "encrypytion = %s\n",
3165                         le16_to_cpu(map_buff->flags) &
3166                         RAID_MAP_FLAG_ENCRYPT_ON ?  "ON" : "OFF");
3167         dev_info(&h->pdev->dev, "dekindex = %u\n",
3168                         le16_to_cpu(map_buff->dekindex));
3169         map_cnt = le16_to_cpu(map_buff->layout_map_count);
3170         for (map = 0; map < map_cnt; map++) {
3171                 dev_info(&h->pdev->dev, "Map%u:\n", map);
3172                 row_cnt = le16_to_cpu(map_buff->row_cnt);
3173                 for (row = 0; row < row_cnt; row++) {
3174                         dev_info(&h->pdev->dev, "  Row%u:\n", row);
3175                         disks_per_row =
3176                                 le16_to_cpu(map_buff->data_disks_per_row);
3177                         for (col = 0; col < disks_per_row; col++, dd++)
3178                                 dev_info(&h->pdev->dev,
3179                                         "    D%02u: h=0x%04x xor=%u,%u\n",
3180                                         col, dd->ioaccel_handle,
3181                                         dd->xor_mult[0], dd->xor_mult[1]);
3182                         disks_per_row =
3183                                 le16_to_cpu(map_buff->metadata_disks_per_row);
3184                         for (col = 0; col < disks_per_row; col++, dd++)
3185                                 dev_info(&h->pdev->dev,
3186                                         "    M%02u: h=0x%04x xor=%u,%u\n",
3187                                         col, dd->ioaccel_handle,
3188                                         dd->xor_mult[0], dd->xor_mult[1]);
3189                 }
3190         }
3191 }
3192 #else
3193 static void hpsa_debug_map_buff(__attribute__((unused)) struct ctlr_info *h,
3194                         __attribute__((unused)) int rc,
3195                         __attribute__((unused)) struct raid_map_data *map_buff)
3196 {
3197 }
3198 #endif
3199
3200 static int hpsa_get_raid_map(struct ctlr_info *h,
3201         unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
3202 {
3203         int rc = 0;
3204         struct CommandList *c;
3205         struct ErrorInfo *ei;
3206
3207         c = cmd_alloc(h);
3208
3209         if (fill_cmd(c, HPSA_GET_RAID_MAP, h, &this_device->raid_map,
3210                         sizeof(this_device->raid_map), 0,
3211                         scsi3addr, TYPE_CMD)) {
3212                 dev_warn(&h->pdev->dev, "hpsa_get_raid_map fill_cmd failed\n");
3213                 cmd_free(h, c);
3214                 return -1;
3215         }
3216         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3217                                         PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3218         if (rc)
3219                 goto out;
3220         ei = c->err_info;
3221         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3222                 hpsa_scsi_interpret_error(h, c);
3223                 rc = -1;
3224                 goto out;
3225         }
3226         cmd_free(h, c);
3227
3228         /* @todo in the future, dynamically allocate RAID map memory */
3229         if (le32_to_cpu(this_device->raid_map.structure_size) >
3230                                 sizeof(this_device->raid_map)) {
3231                 dev_warn(&h->pdev->dev, "RAID map size is too large!\n");
3232                 rc = -1;
3233         }
3234         hpsa_debug_map_buff(h, rc, &this_device->raid_map);
3235         return rc;
3236 out:
3237         cmd_free(h, c);
3238         return rc;
3239 }
3240
3241 static int hpsa_bmic_sense_subsystem_information(struct ctlr_info *h,
3242                 unsigned char scsi3addr[], u16 bmic_device_index,
3243                 struct bmic_sense_subsystem_info *buf, size_t bufsize)
3244 {
3245         int rc = IO_OK;
3246         struct CommandList *c;
3247         struct ErrorInfo *ei;
3248
3249         c = cmd_alloc(h);
3250
3251         rc = fill_cmd(c, BMIC_SENSE_SUBSYSTEM_INFORMATION, h, buf, bufsize,
3252                 0, RAID_CTLR_LUNID, TYPE_CMD);
3253         if (rc)
3254                 goto out;
3255
3256         c->Request.CDB[2] = bmic_device_index & 0xff;
3257         c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;
3258
3259         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3260                                 PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3261         if (rc)
3262                 goto out;
3263         ei = c->err_info;
3264         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3265                 hpsa_scsi_interpret_error(h, c);
3266                 rc = -1;
3267         }
3268 out:
3269         cmd_free(h, c);
3270         return rc;
3271 }
3272
3273 static int hpsa_bmic_id_controller(struct ctlr_info *h,
3274         struct bmic_identify_controller *buf, size_t bufsize)
3275 {
3276         int rc = IO_OK;
3277         struct CommandList *c;
3278         struct ErrorInfo *ei;
3279
3280         c = cmd_alloc(h);
3281
3282         rc = fill_cmd(c, BMIC_IDENTIFY_CONTROLLER, h, buf, bufsize,
3283                 0, RAID_CTLR_LUNID, TYPE_CMD);
3284         if (rc)
3285                 goto out;
3286
3287         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3288                 PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3289         if (rc)
3290                 goto out;
3291         ei = c->err_info;
3292         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3293                 hpsa_scsi_interpret_error(h, c);
3294                 rc = -1;
3295         }
3296 out:
3297         cmd_free(h, c);
3298         return rc;
3299 }
3300
3301 static int hpsa_bmic_id_physical_device(struct ctlr_info *h,
3302                 unsigned char scsi3addr[], u16 bmic_device_index,
3303                 struct bmic_identify_physical_device *buf, size_t bufsize)
3304 {
3305         int rc = IO_OK;
3306         struct CommandList *c;
3307         struct ErrorInfo *ei;
3308
3309         c = cmd_alloc(h);
3310         rc = fill_cmd(c, BMIC_IDENTIFY_PHYSICAL_DEVICE, h, buf, bufsize,
3311                 0, RAID_CTLR_LUNID, TYPE_CMD);
3312         if (rc)
3313                 goto out;
3314
3315         c->Request.CDB[2] = bmic_device_index & 0xff;
3316         c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;
3317
3318         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
3319                                                 DEFAULT_TIMEOUT);
3320         ei = c->err_info;
3321         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3322                 hpsa_scsi_interpret_error(h, c);
3323                 rc = -1;
3324         }
3325 out:
3326         cmd_free(h, c);
3327
3328         return rc;
3329 }
3330
3331 /*
3332  * get enclosure information
3333  * struct ReportExtendedLUNdata *rlep - Used for BMIC drive number
3334  * struct hpsa_scsi_dev_t *encl_dev - device entry for enclosure
3335  * Uses id_physical_device to determine the box_index.
3336  */
3337 static void hpsa_get_enclosure_info(struct ctlr_info *h,
3338                         unsigned char *scsi3addr,
3339                         struct ReportExtendedLUNdata *rlep, int rle_index,
3340                         struct hpsa_scsi_dev_t *encl_dev)
3341 {
3342         int rc = -1;
3343         struct CommandList *c = NULL;
3344         struct ErrorInfo *ei = NULL;
3345         struct bmic_sense_storage_box_params *bssbp = NULL;
3346         struct bmic_identify_physical_device *id_phys = NULL;
3347         struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
3348         u16 bmic_device_index = 0;
3349
3350         bmic_device_index = GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]);
3351
3352         if (bmic_device_index == 0xFF00 || MASKED_DEVICE(&rle->lunid[0])) {
3353                 rc = IO_OK;
3354                 goto out;
3355         }
3356
3357         bssbp = kzalloc(sizeof(*bssbp), GFP_KERNEL);
3358         if (!bssbp)
3359                 goto out;
3360
3361         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
3362         if (!id_phys)
3363                 goto out;
3364
3365         rc = hpsa_bmic_id_physical_device(h, scsi3addr, bmic_device_index,
3366                                                 id_phys, sizeof(*id_phys));
3367         if (rc) {
3368                 dev_warn(&h->pdev->dev, "%s: id_phys failed %d bdi[0x%x]\n",
3369                         __func__, encl_dev->external, bmic_device_index);
3370                 goto out;
3371         }
3372
3373         c = cmd_alloc(h);
3374
3375         rc = fill_cmd(c, BMIC_SENSE_STORAGE_BOX_PARAMS, h, bssbp,
3376                         sizeof(*bssbp), 0, RAID_CTLR_LUNID, TYPE_CMD);
3377
3378         if (rc)
3379                 goto out;
3380
3381         if (id_phys->phys_connector[1] == 'E')
3382                 c->Request.CDB[5] = id_phys->box_index;
3383         else
3384                 c->Request.CDB[5] = 0;
3385
3386         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
3387                                                 DEFAULT_TIMEOUT);
3388         if (rc)
3389                 goto out;
3390
3391         ei = c->err_info;
3392         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3393                 rc = -1;
3394                 goto out;
3395         }
3396
3397         encl_dev->box[id_phys->active_path_number] = bssbp->phys_box_on_port;
3398         memcpy(&encl_dev->phys_connector[id_phys->active_path_number],
3399                 bssbp->phys_connector, sizeof(bssbp->phys_connector));
3400
3401         rc = IO_OK;
3402 out:
3403         kfree(bssbp);
3404         kfree(id_phys);
3405
3406         if (c)
3407                 cmd_free(h, c);
3408
3409         if (rc != IO_OK)
3410                 hpsa_show_dev_msg(KERN_INFO, h, encl_dev,
3411                         "Error, could not get enclosure information\n");
3412 }
3413
3414 static u64 hpsa_get_sas_address_from_report_physical(struct ctlr_info *h,
3415                                                 unsigned char *scsi3addr)
3416 {
3417         struct ReportExtendedLUNdata *physdev;
3418         u32 nphysicals;
3419         u64 sa = 0;
3420         int i;
3421
3422         physdev = kzalloc(sizeof(*physdev), GFP_KERNEL);
3423         if (!physdev)
3424                 return 0;
3425
3426         if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
3427                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
3428                 kfree(physdev);
3429                 return 0;
3430         }
3431         nphysicals = get_unaligned_be32(physdev->LUNListLength) / 24;
3432
3433         for (i = 0; i < nphysicals; i++)
3434                 if (!memcmp(&physdev->LUN[i].lunid[0], scsi3addr, 8)) {
3435                         sa = get_unaligned_be64(&physdev->LUN[i].wwid[0]);
3436                         break;
3437                 }
3438
3439         kfree(physdev);
3440
3441         return sa;
3442 }
3443
3444 static void hpsa_get_sas_address(struct ctlr_info *h, unsigned char *scsi3addr,
3445                                         struct hpsa_scsi_dev_t *dev)
3446 {
3447         int rc;
3448         u64 sa = 0;
3449
3450         if (is_hba_lunid(scsi3addr)) {
3451                 struct bmic_sense_subsystem_info *ssi;
3452
3453                 ssi = kzalloc(sizeof(*ssi), GFP_KERNEL);
3454                 if (!ssi)
3455                         return;
3456
3457                 rc = hpsa_bmic_sense_subsystem_information(h,
3458                                         scsi3addr, 0, ssi, sizeof(*ssi));
3459                 if (rc == 0) {
3460                         sa = get_unaligned_be64(ssi->primary_world_wide_id);
3461                         h->sas_address = sa;
3462                 }
3463
3464                 kfree(ssi);
3465         } else
3466                 sa = hpsa_get_sas_address_from_report_physical(h, scsi3addr);
3467
3468         dev->sas_address = sa;
3469 }
3470
3471 /* Get a device id from inquiry page 0x83 */
3472 static bool hpsa_vpd_page_supported(struct ctlr_info *h,
3473         unsigned char scsi3addr[], u8 page)
3474 {
3475         int rc;
3476         int i;
3477         int pages;
3478         unsigned char *buf, bufsize;
3479
3480         buf = kzalloc(256, GFP_KERNEL);
3481         if (!buf)
3482                 return false;
3483
3484         /* Get the size of the page list first */
3485         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3486                                 VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
3487                                 buf, HPSA_VPD_HEADER_SZ);
3488         if (rc != 0)
3489                 goto exit_unsupported;
3490         pages = buf[3];
3491         if ((pages + HPSA_VPD_HEADER_SZ) <= 255)
3492                 bufsize = pages + HPSA_VPD_HEADER_SZ;
3493         else
3494                 bufsize = 255;
3495
3496         /* Get the whole VPD page list */
3497         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3498                                 VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
3499                                 buf, bufsize);
3500         if (rc != 0)
3501                 goto exit_unsupported;
3502
3503         pages = buf[3];
3504         for (i = 1; i <= pages; i++)
3505                 if (buf[3 + i] == page)
3506                         goto exit_supported;
3507 exit_unsupported:
3508         kfree(buf);
3509         return false;
3510 exit_supported:
3511         kfree(buf);
3512         return true;
3513 }
3514
3515 static void hpsa_get_ioaccel_status(struct ctlr_info *h,
3516         unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
3517 {
3518         int rc;
3519         unsigned char *buf;
3520         u8 ioaccel_status;
3521
3522         this_device->offload_config = 0;
3523         this_device->offload_enabled = 0;
3524         this_device->offload_to_be_enabled = 0;
3525
3526         buf = kzalloc(64, GFP_KERNEL);
3527         if (!buf)
3528                 return;
3529         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_IOACCEL_STATUS))
3530                 goto out;
3531         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3532                         VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS, buf, 64);
3533         if (rc != 0)
3534                 goto out;
3535
3536 #define IOACCEL_STATUS_BYTE 4
3537 #define OFFLOAD_CONFIGURED_BIT 0x01
3538 #define OFFLOAD_ENABLED_BIT 0x02
3539         ioaccel_status = buf[IOACCEL_STATUS_BYTE];
3540         this_device->offload_config =
3541                 !!(ioaccel_status & OFFLOAD_CONFIGURED_BIT);
3542         if (this_device->offload_config) {
3543                 this_device->offload_enabled =
3544                         !!(ioaccel_status & OFFLOAD_ENABLED_BIT);
3545                 if (hpsa_get_raid_map(h, scsi3addr, this_device))
3546                         this_device->offload_enabled = 0;
3547         }
3548         this_device->offload_to_be_enabled = this_device->offload_enabled;
3549 out:
3550         kfree(buf);
3551         return;
3552 }
3553
3554 /* Get the device id from inquiry page 0x83 */
3555 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
3556         unsigned char *device_id, int index, int buflen)
3557 {
3558         int rc;
3559         unsigned char *buf;
3560
3561         /* Does controller have VPD for device id? */
3562         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_DEVICE_ID))
3563                 return 1; /* not supported */
3564
3565         buf = kzalloc(64, GFP_KERNEL);
3566         if (!buf)
3567                 return -ENOMEM;
3568
3569         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
3570                                         HPSA_VPD_LV_DEVICE_ID, buf, 64);
3571         if (rc == 0) {
3572                 if (buflen > 16)
3573                         buflen = 16;
3574                 memcpy(device_id, &buf[8], buflen);
3575         }
3576
3577         kfree(buf);
3578
3579         return rc; /*0 - got id,  otherwise, didn't */
3580 }
3581
3582 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
3583                 void *buf, int bufsize,
3584                 int extended_response)
3585 {
3586         int rc = IO_OK;
3587         struct CommandList *c;
3588         unsigned char scsi3addr[8];
3589         struct ErrorInfo *ei;
3590
3591         c = cmd_alloc(h);
3592
3593         /* address the controller */
3594         memset(scsi3addr, 0, sizeof(scsi3addr));
3595         if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
3596                 buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
3597                 rc = -1;
3598                 goto out;
3599         }
3600         if (extended_response)
3601                 c->Request.CDB[1] = extended_response;
3602         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3603                                         PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3604         if (rc)
3605                 goto out;
3606         ei = c->err_info;
3607         if (ei->CommandStatus != 0 &&
3608             ei->CommandStatus != CMD_DATA_UNDERRUN) {
3609                 hpsa_scsi_interpret_error(h, c);
3610                 rc = -1;
3611         } else {
3612                 struct ReportLUNdata *rld = buf;
3613
3614                 if (rld->extended_response_flag != extended_response) {
3615                         dev_err(&h->pdev->dev,
3616                                 "report luns requested format %u, got %u\n",
3617                                 extended_response,
3618                                 rld->extended_response_flag);
3619                         rc = -1;
3620                 }
3621         }
3622 out:
3623         cmd_free(h, c);
3624         return rc;
3625 }
3626
3627 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
3628                 struct ReportExtendedLUNdata *buf, int bufsize)
3629 {
3630         int rc;
3631         struct ReportLUNdata *lbuf;
3632
3633         rc = hpsa_scsi_do_report_luns(h, 0, buf, bufsize,
3634                                       HPSA_REPORT_PHYS_EXTENDED);
3635         if (!rc || !hpsa_allow_any)
3636                 return rc;
3637
3638         /* REPORT PHYS EXTENDED is not supported */
3639         lbuf = kzalloc(sizeof(*lbuf), GFP_KERNEL);
3640         if (!lbuf)
3641                 return -ENOMEM;
3642
3643         rc = hpsa_scsi_do_report_luns(h, 0, lbuf, sizeof(*lbuf), 0);
3644         if (!rc) {
3645                 int i;
3646                 u32 nphys;
3647
3648                 /* Copy ReportLUNdata header */
3649                 memcpy(buf, lbuf, 8);
3650                 nphys = be32_to_cpu(*((__be32 *)lbuf->LUNListLength)) / 8;
3651                 for (i = 0; i < nphys; i++)
3652                         memcpy(buf->LUN[i].lunid, lbuf->LUN[i], 8);
3653         }
3654         kfree(lbuf);
3655         return rc;
3656 }
3657
3658 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
3659                 struct ReportLUNdata *buf, int bufsize)
3660 {
3661         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
3662 }
3663
3664 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
3665         int bus, int target, int lun)
3666 {
3667         device->bus = bus;
3668         device->target = target;
3669         device->lun = lun;
3670 }
3671
3672 /* Use VPD inquiry to get details of volume status */
3673 static int hpsa_get_volume_status(struct ctlr_info *h,
3674                                         unsigned char scsi3addr[])
3675 {
3676         int rc;
3677         int status;
3678         int size;
3679         unsigned char *buf;
3680
3681         buf = kzalloc(64, GFP_KERNEL);
3682         if (!buf)
3683                 return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3684
3685         /* Does controller have VPD for logical volume status? */
3686         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_STATUS))
3687                 goto exit_failed;
3688
3689         /* Get the size of the VPD return buffer */
3690         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
3691                                         buf, HPSA_VPD_HEADER_SZ);
3692         if (rc != 0)
3693                 goto exit_failed;
3694         size = buf[3];
3695
3696         /* Now get the whole VPD buffer */
3697         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
3698                                         buf, size + HPSA_VPD_HEADER_SZ);
3699         if (rc != 0)
3700                 goto exit_failed;
3701         status = buf[4]; /* status byte */
3702
3703         kfree(buf);
3704         return status;
3705 exit_failed:
3706         kfree(buf);
3707         return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3708 }
3709
3710 /* Determine offline status of a volume.
3711  * Return either:
3712  *  0 (not offline)
3713  *  0xff (offline for unknown reasons)
3714  *  # (integer code indicating one of several NOT READY states
3715  *     describing why a volume is to be kept offline)
3716  */
3717 static unsigned char hpsa_volume_offline(struct ctlr_info *h,
3718                                         unsigned char scsi3addr[])
3719 {
3720         struct CommandList *c;
3721         unsigned char *sense;
3722         u8 sense_key, asc, ascq;
3723         int sense_len;
3724         int rc, ldstat = 0;
3725         u16 cmd_status;
3726         u8 scsi_status;
3727 #define ASC_LUN_NOT_READY 0x04
3728 #define ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS 0x04
3729 #define ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ 0x02
3730
3731         c = cmd_alloc(h);
3732
3733         (void) fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, scsi3addr, TYPE_CMD);
3734         rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
3735                                         DEFAULT_TIMEOUT);
3736         if (rc) {
3737                 cmd_free(h, c);
3738                 return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3739         }
3740         sense = c->err_info->SenseInfo;
3741         if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
3742                 sense_len = sizeof(c->err_info->SenseInfo);
3743         else
3744                 sense_len = c->err_info->SenseLen;
3745         decode_sense_data(sense, sense_len, &sense_key, &asc, &ascq);
3746         cmd_status = c->err_info->CommandStatus;
3747         scsi_status = c->err_info->ScsiStatus;
3748         cmd_free(h, c);
3749
3750         /* Determine the reason for not ready state */
3751         ldstat = hpsa_get_volume_status(h, scsi3addr);
3752
3753         /* Keep volume offline in certain cases: */
3754         switch (ldstat) {
3755         case HPSA_LV_FAILED:
3756         case HPSA_LV_UNDERGOING_ERASE:
3757         case HPSA_LV_NOT_AVAILABLE:
3758         case HPSA_LV_UNDERGOING_RPI:
3759         case HPSA_LV_PENDING_RPI:
3760         case HPSA_LV_ENCRYPTED_NO_KEY:
3761         case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
3762         case HPSA_LV_UNDERGOING_ENCRYPTION:
3763         case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
3764         case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
3765                 return ldstat;
3766         case HPSA_VPD_LV_STATUS_UNSUPPORTED:
3767                 /* If VPD status page isn't available,
3768                  * use ASC/ASCQ to determine state
3769                  */
3770                 if ((ascq == ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS) ||
3771                         (ascq == ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ))
3772                         return ldstat;
3773                 break;
3774         default:
3775                 break;
3776         }
3777         return HPSA_LV_OK;
3778 }
3779
3780 /*
3781  * Find out if a logical device supports aborts by simply trying one.
3782  * Smart Array may claim not to support aborts on logical drives, but
3783  * if a MSA2000 * is connected, the drives on that will be presented
3784  * by the Smart Array as logical drives, and aborts may be sent to
3785  * those devices successfully.  So the simplest way to find out is
3786  * to simply try an abort and see how the device responds.
3787  */
3788 static int hpsa_device_supports_aborts(struct ctlr_info *h,
3789                                         unsigned char *scsi3addr)
3790 {
3791         struct CommandList *c;
3792         struct ErrorInfo *ei;
3793         int rc = 0;
3794
3795         u64 tag = (u64) -1; /* bogus tag */
3796
3797         /* Assume that physical devices support aborts */
3798         if (!is_logical_dev_addr_mode(scsi3addr))
3799                 return 1;
3800
3801         c = cmd_alloc(h);
3802
3803         (void) fill_cmd(c, HPSA_ABORT_MSG, h, &tag, 0, 0, scsi3addr, TYPE_MSG);
3804         (void) hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
3805                                         DEFAULT_TIMEOUT);
3806         /* no unmap needed here because no data xfer. */
3807         ei = c->err_info;
3808         switch (ei->CommandStatus) {
3809         case CMD_INVALID:
3810                 rc = 0;
3811                 break;
3812         case CMD_UNABORTABLE:
3813         case CMD_ABORT_FAILED:
3814                 rc = 1;
3815                 break;
3816         case CMD_TMF_STATUS:
3817                 rc = hpsa_evaluate_tmf_status(h, c);
3818                 break;
3819         default:
3820                 rc = 0;
3821                 break;
3822         }
3823         cmd_free(h, c);
3824         return rc;
3825 }
3826
3827 static int hpsa_update_device_info(struct ctlr_info *h,
3828         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
3829         unsigned char *is_OBDR_device)
3830 {
3831
3832 #define OBDR_SIG_OFFSET 43
3833 #define OBDR_TAPE_SIG "$DR-10"
3834 #define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
3835 #define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
3836
3837         unsigned char *inq_buff;
3838         unsigned char *obdr_sig;
3839         int rc = 0;
3840
3841         inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
3842         if (!inq_buff) {
3843                 rc = -ENOMEM;
3844                 goto bail_out;
3845         }
3846
3847         /* Do an inquiry to the device to see what it is. */
3848         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
3849                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
3850                 dev_err(&h->pdev->dev,
3851                         "%s: inquiry failed, device will be skipped.\n",
3852                         __func__);
3853                 rc = HPSA_INQUIRY_FAILED;
3854                 goto bail_out;
3855         }
3856
3857         scsi_sanitize_inquiry_string(&inq_buff[8], 8);
3858         scsi_sanitize_inquiry_string(&inq_buff[16], 16);
3859
3860         this_device->devtype = (inq_buff[0] & 0x1f);
3861         memcpy(this_device->scsi3addr, scsi3addr, 8);
3862         memcpy(this_device->vendor, &inq_buff[8],
3863                 sizeof(this_device->vendor));
3864         memcpy(this_device->model, &inq_buff[16],
3865                 sizeof(this_device->model));
3866         this_device->rev = inq_buff[2];
3867         memset(this_device->device_id, 0,
3868                 sizeof(this_device->device_id));
3869         if (hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
3870                 sizeof(this_device->device_id)))
3871                 dev_err(&h->pdev->dev,
3872                         "hpsa%d: %s: can't get device id for host %d:C0:T%d:L%d\t%s\t%.16s\n",
3873                         h->ctlr, __func__,
3874                         h->scsi_host->host_no,
3875                         this_device->target, this_device->lun,
3876                         scsi_device_type(this_device->devtype),
3877                         this_device->model);
3878
3879         if ((this_device->devtype == TYPE_DISK ||
3880                 this_device->devtype == TYPE_ZBC) &&
3881                 is_logical_dev_addr_mode(scsi3addr)) {
3882                 unsigned char volume_offline;
3883
3884                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
3885                 if (h->fw_support & MISC_FW_RAID_OFFLOAD_BASIC)
3886                         hpsa_get_ioaccel_status(h, scsi3addr, this_device);
3887                 volume_offline = hpsa_volume_offline(h, scsi3addr);
3888                 this_device->volume_offline = volume_offline;
3889                 if (volume_offline == HPSA_LV_FAILED) {
3890                         rc = HPSA_LV_FAILED;
3891                         dev_err(&h->pdev->dev,
3892                                 "%s: LV failed, device will be skipped.\n",
3893                                 __func__);
3894                         goto bail_out;
3895                 }
3896         } else {
3897                 this_device->raid_level = RAID_UNKNOWN;
3898                 this_device->offload_config = 0;
3899                 this_device->offload_enabled = 0;
3900                 this_device->offload_to_be_enabled = 0;
3901                 this_device->hba_ioaccel_enabled = 0;
3902                 this_device->volume_offline = 0;
3903                 this_device->queue_depth = h->nr_cmds;
3904         }
3905
3906         if (is_OBDR_device) {
3907                 /* See if this is a One-Button-Disaster-Recovery device
3908                  * by looking for "$DR-10" at offset 43 in inquiry data.
3909                  */
3910                 obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
3911                 *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
3912                                         strncmp(obdr_sig, OBDR_TAPE_SIG,
3913                                                 OBDR_SIG_LEN) == 0);
3914         }
3915         kfree(inq_buff);
3916         return 0;
3917
3918 bail_out:
3919         kfree(inq_buff);
3920         return rc;
3921 }
3922
3923 static void hpsa_update_device_supports_aborts(struct ctlr_info *h,
3924                         struct hpsa_scsi_dev_t *dev, u8 *scsi3addr)
3925 {
3926         unsigned long flags;
3927         int rc, entry;
3928         /*
3929          * See if this device supports aborts.  If we already know
3930          * the device, we already know if it supports aborts, otherwise
3931          * we have to find out if it supports aborts by trying one.
3932          */
3933         spin_lock_irqsave(&h->devlock, flags);
3934         rc = hpsa_scsi_find_entry(dev, h->dev, h->ndevices, &entry);
3935         if ((rc == DEVICE_SAME || rc == DEVICE_UPDATED) &&
3936                 entry >= 0 && entry < h->ndevices) {
3937                 dev->supports_aborts = h->dev[entry]->supports_aborts;
3938                 spin_unlock_irqrestore(&h->devlock, flags);
3939         } else {
3940                 spin_unlock_irqrestore(&h->devlock, flags);
3941                 dev->supports_aborts =
3942                                 hpsa_device_supports_aborts(h, scsi3addr);
3943                 if (dev->supports_aborts < 0)
3944                         dev->supports_aborts = 0;
3945         }
3946 }
3947
3948 /*
3949  * Helper function to assign bus, target, lun mapping of devices.
3950  * Logical drive target and lun are assigned at this time, but
3951  * physical device lun and target assignment are deferred (assigned
3952  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
3953 */
3954 static void figure_bus_target_lun(struct ctlr_info *h,
3955         u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
3956 {
3957         u32 lunid = get_unaligned_le32(lunaddrbytes);
3958
3959         if (!is_logical_dev_addr_mode(lunaddrbytes)) {
3960                 /* physical device, target and lun filled in later */
3961                 if (is_hba_lunid(lunaddrbytes)) {
3962                         int bus = HPSA_HBA_BUS;
3963
3964                         if (!device->rev)
3965                                 bus = HPSA_LEGACY_HBA_BUS;
3966                         hpsa_set_bus_target_lun(device,
3967                                         bus, 0, lunid & 0x3fff);
3968                 } else
3969                         /* defer target, lun assignment for physical devices */
3970                         hpsa_set_bus_target_lun(device,
3971                                         HPSA_PHYSICAL_DEVICE_BUS, -1, -1);
3972                 return;
3973         }
3974         /* It's a logical device */
3975         if (device->external) {
3976                 hpsa_set_bus_target_lun(device,
3977                         HPSA_EXTERNAL_RAID_VOLUME_BUS, (lunid >> 16) & 0x3fff,
3978                         lunid & 0x00ff);
3979                 return;
3980         }
3981         hpsa_set_bus_target_lun(device, HPSA_RAID_VOLUME_BUS,
3982                                 0, lunid & 0x3fff);
3983 }
3984
3985
3986 /*
3987  * Get address of physical disk used for an ioaccel2 mode command:
3988  *      1. Extract ioaccel2 handle from the command.
3989  *      2. Find a matching ioaccel2 handle from list of physical disks.
3990  *      3. Return:
3991  *              1 and set scsi3addr to address of matching physical
3992  *              0 if no matching physical disk was found.
3993  */
3994 static int hpsa_get_pdisk_of_ioaccel2(struct ctlr_info *h,
3995         struct CommandList *ioaccel2_cmd_to_abort, unsigned char *scsi3addr)
3996 {
3997         struct io_accel2_cmd *c2 =
3998                         &h->ioaccel2_cmd_pool[ioaccel2_cmd_to_abort->cmdindex];
3999         unsigned long flags;
4000         int i;
4001
4002         spin_lock_irqsave(&h->devlock, flags);
4003         for (i = 0; i < h->ndevices; i++)
4004                 if (h->dev[i]->ioaccel_handle == le32_to_cpu(c2->scsi_nexus)) {
4005                         memcpy(scsi3addr, h->dev[i]->scsi3addr,
4006                                 sizeof(h->dev[i]->scsi3addr));
4007                         spin_unlock_irqrestore(&h->devlock, flags);
4008                         return 1;
4009                 }
4010         spin_unlock_irqrestore(&h->devlock, flags);
4011         return 0;
4012 }
4013
4014 static int  figure_external_status(struct ctlr_info *h, int raid_ctlr_position,
4015         int i, int nphysicals, int nlocal_logicals)
4016 {
4017         /* In report logicals, local logicals are listed first,
4018         * then any externals.
4019         */
4020         int logicals_start = nphysicals + (raid_ctlr_position == 0);
4021
4022         if (i == raid_ctlr_position)
4023                 return 0;
4024
4025         if (i < logicals_start)
4026                 return 0;
4027
4028         /* i is in logicals range, but still within local logicals */
4029         if ((i - nphysicals - (raid_ctlr_position == 0)) < nlocal_logicals)
4030                 return 0;
4031
4032         return 1; /* it's an external lun */
4033 }
4034
4035 /*
4036  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
4037  * logdev.  The number of luns in physdev and logdev are returned in
4038  * *nphysicals and *nlogicals, respectively.
4039  * Returns 0 on success, -1 otherwise.
4040  */
4041 static int hpsa_gather_lun_info(struct ctlr_info *h,
4042         struct ReportExtendedLUNdata *physdev, u32 *nphysicals,
4043         struct ReportLUNdata *logdev, u32 *nlogicals)
4044 {
4045         if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
4046                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
4047                 return -1;
4048         }
4049         *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 24;
4050         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
4051                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded. %d LUNs ignored.\n",
4052                         HPSA_MAX_PHYS_LUN, *nphysicals - HPSA_MAX_PHYS_LUN);
4053                 *nphysicals = HPSA_MAX_PHYS_LUN;
4054         }
4055         if (hpsa_scsi_do_report_log_luns(h, logdev, sizeof(*logdev))) {
4056                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
4057                 return -1;
4058         }
4059         *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
4060         /* Reject Logicals in excess of our max capability. */
4061         if (*nlogicals > HPSA_MAX_LUN) {
4062                 dev_warn(&h->pdev->dev,
4063                         "maximum logical LUNs (%d) exceeded.  "
4064                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
4065                         *nlogicals - HPSA_MAX_LUN);
4066                         *nlogicals = HPSA_MAX_LUN;
4067         }
4068         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
4069                 dev_warn(&h->pdev->dev,
4070                         "maximum logical + physical LUNs (%d) exceeded. "
4071                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
4072                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
4073                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
4074         }
4075         return 0;
4076 }
4077
4078 static u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position,
4079         int i, int nphysicals, int nlogicals,
4080         struct ReportExtendedLUNdata *physdev_list,
4081         struct ReportLUNdata *logdev_list)
4082 {
4083         /* Helper function, figure out where the LUN ID info is coming from
4084          * given index i, lists of physical and logical devices, where in
4085          * the list the raid controller is supposed to appear (first or last)
4086          */
4087
4088         int logicals_start = nphysicals + (raid_ctlr_position == 0);
4089         int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
4090
4091         if (i == raid_ctlr_position)
4092                 return RAID_CTLR_LUNID;
4093
4094         if (i < logicals_start)
4095                 return &physdev_list->LUN[i -
4096                                 (raid_ctlr_position == 0)].lunid[0];
4097
4098         if (i < last_device)
4099                 return &logdev_list->LUN[i - nphysicals -
4100                         (raid_ctlr_position == 0)][0];
4101         BUG();
4102         return NULL;
4103 }
4104
4105 /* get physical drive ioaccel handle and queue depth */
4106 static void hpsa_get_ioaccel_drive_info(struct ctlr_info *h,
4107                 struct hpsa_scsi_dev_t *dev,
4108                 struct ReportExtendedLUNdata *rlep, int rle_index,
4109                 struct bmic_identify_physical_device *id_phys)
4110 {
4111         int rc;
4112         struct ext_report_lun_entry *rle;
4113
4114         /*
4115          * external targets don't support BMIC
4116          */
4117         if (dev->external) {
4118                 dev->queue_depth = 7;
4119                 return;
4120         }
4121
4122         rle = &rlep->LUN[rle_index];
4123
4124         dev->ioaccel_handle = rle->ioaccel_handle;
4125         if ((rle->device_flags & 0x08) && dev->ioaccel_handle)
4126                 dev->hba_ioaccel_enabled = 1;
4127         memset(id_phys, 0, sizeof(*id_phys));
4128         rc = hpsa_bmic_id_physical_device(h, &rle->lunid[0],
4129                         GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]), id_phys,
4130                         sizeof(*id_phys));
4131         if (!rc)
4132                 /* Reserve space for FW operations */
4133 #define DRIVE_CMDS_RESERVED_FOR_FW 2
4134 #define DRIVE_QUEUE_DEPTH 7
4135                 dev->queue_depth =
4136                         le16_to_cpu(id_phys->current_queue_depth_limit) -
4137                                 DRIVE_CMDS_RESERVED_FOR_FW;
4138         else
4139                 dev->queue_depth = DRIVE_QUEUE_DEPTH; /* conservative */
4140 }
4141
4142 static void hpsa_get_path_info(struct hpsa_scsi_dev_t *this_device,
4143         struct ReportExtendedLUNdata *rlep, int rle_index,
4144         struct bmic_identify_physical_device *id_phys)
4145 {
4146         struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
4147
4148         if ((rle->device_flags & 0x08) && this_device->ioaccel_handle)
4149                 this_device->hba_ioaccel_enabled = 1;
4150
4151         memcpy(&this_device->active_path_index,
4152                 &id_phys->active_path_number,
4153                 sizeof(this_device->active_path_index));
4154         memcpy(&this_device->path_map,
4155                 &id_phys->redundant_path_present_map,
4156                 sizeof(this_device->path_map));
4157         memcpy(&this_device->box,
4158                 &id_phys->alternate_paths_phys_box_on_port,
4159                 sizeof(this_device->box));
4160         memcpy(&this_device->phys_connector,
4161                 &id_phys->alternate_paths_phys_connector,
4162                 sizeof(this_device->phys_connector));
4163         memcpy(&this_device->bay,
4164                 &id_phys->phys_bay_in_box,
4165                 sizeof(this_device->bay));
4166 }
4167
4168 /* get number of local logical disks. */
4169 static int hpsa_set_local_logical_count(struct ctlr_info *h,
4170         struct bmic_identify_controller *id_ctlr,
4171         u32 *nlocals)
4172 {
4173         int rc;
4174
4175         if (!id_ctlr) {
4176                 dev_warn(&h->pdev->dev, "%s: id_ctlr buffer is NULL.\n",
4177                         __func__);
4178                 return -ENOMEM;
4179         }
4180         memset(id_ctlr, 0, sizeof(*id_ctlr));
4181         rc = hpsa_bmic_id_controller(h, id_ctlr, sizeof(*id_ctlr));
4182         if (!rc)
4183                 if (id_ctlr->configured_logical_drive_count < 256)
4184                         *nlocals = id_ctlr->configured_logical_drive_count;
4185                 else
4186                         *nlocals = le16_to_cpu(
4187                                         id_ctlr->extended_logical_unit_count);
4188         else
4189                 *nlocals = -1;
4190         return rc;
4191 }
4192
4193 static bool hpsa_is_disk_spare(struct ctlr_info *h, u8 *lunaddrbytes)
4194 {
4195         struct bmic_identify_physical_device *id_phys;
4196         bool is_spare = false;
4197         int rc;
4198
4199         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
4200         if (!id_phys)
4201                 return false;
4202
4203         rc = hpsa_bmic_id_physical_device(h,
4204                                         lunaddrbytes,
4205                                         GET_BMIC_DRIVE_NUMBER(lunaddrbytes),
4206                                         id_phys, sizeof(*id_phys));
4207         if (rc == 0)
4208                 is_spare = (id_phys->more_flags >> 6) & 0x01;
4209
4210         kfree(id_phys);
4211         return is_spare;
4212 }
4213
4214 #define RPL_DEV_FLAG_NON_DISK                           0x1
4215 #define RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED  0x2
4216 #define RPL_DEV_FLAG_UNCONFIG_DISK                      0x4
4217
4218 #define BMIC_DEVICE_TYPE_ENCLOSURE  6
4219
4220 static bool hpsa_skip_device(struct ctlr_info *h, u8 *lunaddrbytes,
4221                                 struct ext_report_lun_entry *rle)
4222 {
4223         u8 device_flags;
4224         u8 device_type;
4225
4226         if (!MASKED_DEVICE(lunaddrbytes))
4227                 return false;
4228
4229         device_flags = rle->device_flags;
4230         device_type = rle->device_type;
4231
4232         if (device_flags & RPL_DEV_FLAG_NON_DISK) {
4233                 if (device_type == BMIC_DEVICE_TYPE_ENCLOSURE)
4234                         return false;
4235                 return true;
4236         }
4237
4238         if (!(device_flags & RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED))
4239                 return false;
4240
4241         if (device_flags & RPL_DEV_FLAG_UNCONFIG_DISK)
4242                 return false;
4243
4244         /*
4245          * Spares may be spun down, we do not want to
4246          * do an Inquiry to a RAID set spare drive as
4247          * that would have them spun up, that is a
4248          * performance hit because I/O to the RAID device
4249          * stops while the spin up occurs which can take
4250          * over 50 seconds.
4251          */
4252         if (hpsa_is_disk_spare(h, lunaddrbytes))
4253                 return true;
4254
4255         return false;
4256 }
4257
4258 static void hpsa_update_scsi_devices(struct ctlr_info *h)
4259 {
4260         /* the idea here is we could get notified
4261          * that some devices have changed, so we do a report
4262          * physical luns and report logical luns cmd, and adjust
4263          * our list of devices accordingly.
4264          *
4265          * The scsi3addr's of devices won't change so long as the
4266          * adapter is not reset.  That means we can rescan and
4267          * tell which devices we already know about, vs. new
4268          * devices, vs.  disappearing devices.
4269          */
4270         struct ReportExtendedLUNdata *physdev_list = NULL;
4271         struct ReportLUNdata *logdev_list = NULL;
4272         struct bmic_identify_physical_device *id_phys = NULL;
4273         struct bmic_identify_controller *id_ctlr = NULL;
4274         u32 nphysicals = 0;
4275         u32 nlogicals = 0;
4276         u32 nlocal_logicals = 0;
4277         u32 ndev_allocated = 0;
4278         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
4279         int ncurrent = 0;
4280         int i, n_ext_target_devs, ndevs_to_allocate;
4281         int raid_ctlr_position;
4282         bool physical_device;
4283         DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
4284
4285         currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
4286         physdev_list = kzalloc(sizeof(*physdev_list), GFP_KERNEL);
4287         logdev_list = kzalloc(sizeof(*logdev_list), GFP_KERNEL);
4288         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
4289         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
4290         id_ctlr = kzalloc(sizeof(*id_ctlr), GFP_KERNEL);
4291
4292         if (!currentsd || !physdev_list || !logdev_list ||
4293                 !tmpdevice || !id_phys || !id_ctlr) {
4294                 dev_err(&h->pdev->dev, "out of memory\n");
4295                 goto out;
4296         }
4297         memset(lunzerobits, 0, sizeof(lunzerobits));
4298
4299         h->drv_req_rescan = 0; /* cancel scheduled rescan - we're doing it. */
4300
4301         if (hpsa_gather_lun_info(h, physdev_list, &nphysicals,
4302                         logdev_list, &nlogicals)) {
4303                 h->drv_req_rescan = 1;
4304                 goto out;
4305         }
4306
4307         /* Set number of local logicals (non PTRAID) */
4308         if (hpsa_set_local_logical_count(h, id_ctlr, &nlocal_logicals)) {
4309                 dev_warn(&h->pdev->dev,
4310                         "%s: Can't determine number of local logical devices.\n",
4311                         __func__);
4312         }
4313
4314         /* We might see up to the maximum number of logical and physical disks
4315          * plus external target devices, and a device for the local RAID
4316          * controller.
4317          */
4318         ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
4319
4320         /* Allocate the per device structures */
4321         for (i = 0; i < ndevs_to_allocate; i++) {
4322                 if (i >= HPSA_MAX_DEVICES) {
4323                         dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded."
4324                                 "  %d devices ignored.\n", HPSA_MAX_DEVICES,
4325                                 ndevs_to_allocate - HPSA_MAX_DEVICES);
4326                         break;
4327                 }
4328
4329                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
4330                 if (!currentsd[i]) {
4331                         h->drv_req_rescan = 1;
4332                         goto out;
4333                 }
4334                 ndev_allocated++;
4335         }
4336
4337         if (is_scsi_rev_5(h))
4338                 raid_ctlr_position = 0;
4339         else
4340                 raid_ctlr_position = nphysicals + nlogicals;
4341
4342         /* adjust our table of devices */
4343         n_ext_target_devs = 0;
4344         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
4345                 u8 *lunaddrbytes, is_OBDR = 0;
4346                 int rc = 0;
4347                 int phys_dev_index = i - (raid_ctlr_position == 0);
4348                 bool skip_device = false;
4349
4350                 physical_device = i < nphysicals + (raid_ctlr_position == 0);
4351
4352                 /* Figure out where the LUN ID info is coming from */
4353                 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
4354                         i, nphysicals, nlogicals, physdev_list, logdev_list);
4355
4356                 /* Determine if this is a lun from an external target array */
4357                 tmpdevice->external =
4358                         figure_external_status(h, raid_ctlr_position, i,
4359                                                 nphysicals, nlocal_logicals);
4360
4361                 /*
4362                  * Skip over some devices such as a spare.
4363                  */
4364                 if (!tmpdevice->external && physical_device) {
4365                         skip_device = hpsa_skip_device(h, lunaddrbytes,
4366                                         &physdev_list->LUN[phys_dev_index]);
4367                         if (skip_device)
4368                                 continue;
4369                 }
4370
4371                 /* Get device type, vendor, model, device id */
4372                 rc = hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
4373                                                         &is_OBDR);
4374                 if (rc == -ENOMEM) {
4375                         dev_warn(&h->pdev->dev,
4376                                 "Out of memory, rescan deferred.\n");
4377                         h->drv_req_rescan = 1;
4378                         goto out;
4379                 }
4380                 if (rc) {
4381                         h->drv_req_rescan = 1;
4382                         continue;
4383                 }
4384
4385                 figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
4386                 hpsa_update_device_supports_aborts(h, tmpdevice, lunaddrbytes);
4387                 this_device = currentsd[ncurrent];
4388
4389                 /* Turn on discovery_polling if there are ext target devices.
4390                  * Event-based change notification is unreliable for those.
4391                  */
4392                 if (!h->discovery_polling) {
4393                         if (tmpdevice->external) {
4394                                 h->discovery_polling = 1;
4395                                 dev_info(&h->pdev->dev,
4396                                         "External target, activate discovery polling.\n");
4397                         }
4398                 }
4399
4400
4401                 *this_device = *tmpdevice;
4402                 this_device->physical_device = physical_device;
4403
4404                 /*
4405                  * Expose all devices except for physical devices that
4406                  * are masked.
4407                  */
4408                 if (MASKED_DEVICE(lunaddrbytes) && this_device->physical_device)
4409                         this_device->expose_device = 0;
4410                 else
4411                         this_device->expose_device = 1;
4412
4413
4414                 /*
4415                  * Get the SAS address for physical devices that are exposed.
4416                  */
4417                 if (this_device->physical_device && this_device->expose_device)
4418                         hpsa_get_sas_address(h, lunaddrbytes, this_device);
4419
4420                 switch (this_device->devtype) {
4421                 case TYPE_ROM:
4422                         /* We don't *really* support actual CD-ROM devices,
4423                          * just "One Button Disaster Recovery" tape drive
4424                          * which temporarily pretends to be a CD-ROM drive.
4425                          * So we check that the device is really an OBDR tape
4426                          * device by checking for "$DR-10" in bytes 43-48 of
4427                          * the inquiry data.
4428                          */
4429                         if (is_OBDR)
4430                                 ncurrent++;
4431                         break;
4432                 case TYPE_DISK:
4433                 case TYPE_ZBC:
4434                         if (this_device->physical_device) {
4435                                 /* The disk is in HBA mode. */
4436                                 /* Never use RAID mapper in HBA mode. */
4437                                 this_device->offload_enabled = 0;
4438                                 hpsa_get_ioaccel_drive_info(h, this_device,
4439                                         physdev_list, phys_dev_index, id_phys);
4440                                 hpsa_get_path_info(this_device,
4441                                         physdev_list, phys_dev_index, id_phys);
4442                         }
4443                         ncurrent++;
4444                         break;
4445                 case TYPE_TAPE:
4446                 case TYPE_MEDIUM_CHANGER:
4447                         ncurrent++;
4448                         break;
4449                 case TYPE_ENCLOSURE:
4450                         if (!this_device->external)
4451                                 hpsa_get_enclosure_info(h, lunaddrbytes,
4452                                                 physdev_list, phys_dev_index,
4453                                                 this_device);
4454                         ncurrent++;
4455                         break;
4456                 case TYPE_RAID:
4457                         /* Only present the Smartarray HBA as a RAID controller.
4458                          * If it's a RAID controller other than the HBA itself
4459                          * (an external RAID controller, MSA500 or similar)
4460                          * don't present it.
4461                          */
4462                         if (!is_hba_lunid(lunaddrbytes))
4463                                 break;
4464                         ncurrent++;
4465                         break;
4466                 default:
4467                         break;
4468                 }
4469                 if (ncurrent >= HPSA_MAX_DEVICES)
4470                         break;
4471         }
4472
4473         if (h->sas_host == NULL) {
4474                 int rc = 0;
4475
4476                 rc = hpsa_add_sas_host(h);
4477                 if (rc) {
4478                         dev_warn(&h->pdev->dev,
4479                                 "Could not add sas host %d\n", rc);
4480                         goto out;
4481                 }
4482         }
4483
4484         adjust_hpsa_scsi_table(h, currentsd, ncurrent);
4485 out:
4486         kfree(tmpdevice);
4487         for (i = 0; i < ndev_allocated; i++)
4488                 kfree(currentsd[i]);
4489         kfree(currentsd);
4490         kfree(physdev_list);
4491         kfree(logdev_list);
4492         kfree(id_ctlr);
4493         kfree(id_phys);
4494 }
4495
4496 static void hpsa_set_sg_descriptor(struct SGDescriptor *desc,
4497                                    struct scatterlist *sg)
4498 {
4499         u64 addr64 = (u64) sg_dma_address(sg);
4500         unsigned int len = sg_dma_len(sg);
4501
4502         desc->Addr = cpu_to_le64(addr64);
4503         desc->Len = cpu_to_le32(len);
4504         desc->Ext = 0;
4505 }
4506
4507 /*
4508  * hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
4509  * dma mapping  and fills in the scatter gather entries of the
4510  * hpsa command, cp.
4511  */
4512 static int hpsa_scatter_gather(struct ctlr_info *h,
4513                 struct CommandList *cp,
4514                 struct scsi_cmnd *cmd)
4515 {
4516         struct scatterlist *sg;
4517         int use_sg, i, sg_limit, chained, last_sg;
4518         struct SGDescriptor *curr_sg;
4519
4520         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4521
4522         use_sg = scsi_dma_map(cmd);
4523         if (use_sg < 0)
4524                 return use_sg;
4525
4526         if (!use_sg)
4527                 goto sglist_finished;
4528
4529         /*
4530          * If the number of entries is greater than the max for a single list,
4531          * then we have a chained list; we will set up all but one entry in the
4532          * first list (the last entry is saved for link information);
4533          * otherwise, we don't have a chained list and we'll set up at each of
4534          * the entries in the one list.
4535          */
4536         curr_sg = cp->SG;
4537         chained = use_sg > h->max_cmd_sg_entries;
4538         sg_limit = chained ? h->max_cmd_sg_entries - 1 : use_sg;
4539         last_sg = scsi_sg_count(cmd) - 1;
4540         scsi_for_each_sg(cmd, sg, sg_limit, i) {
4541                 hpsa_set_sg_descriptor(curr_sg, sg);
4542                 curr_sg++;
4543         }
4544
4545         if (chained) {
4546                 /*
4547                  * Continue with the chained list.  Set curr_sg to the chained
4548                  * list.  Modify the limit to the total count less the entries
4549                  * we've already set up.  Resume the scan at the list entry
4550                  * where the previous loop left off.
4551                  */
4552                 curr_sg = h->cmd_sg_list[cp->cmdindex];
4553                 sg_limit = use_sg - sg_limit;
4554                 for_each_sg(sg, sg, sg_limit, i) {
4555                         hpsa_set_sg_descriptor(curr_sg, sg);
4556                         curr_sg++;
4557                 }
4558         }
4559
4560         /* Back the pointer up to the last entry and mark it as "last". */
4561         (curr_sg - 1)->Ext = cpu_to_le32(HPSA_SG_LAST);
4562
4563         if (use_sg + chained > h->maxSG)
4564                 h->maxSG = use_sg + chained;
4565
4566         if (chained) {
4567                 cp->Header.SGList = h->max_cmd_sg_entries;
4568                 cp->Header.SGTotal = cpu_to_le16(use_sg + 1);
4569                 if (hpsa_map_sg_chain_block(h, cp)) {
4570                         scsi_dma_unmap(cmd);
4571                         return -1;
4572                 }
4573                 return 0;
4574         }
4575
4576 sglist_finished:
4577
4578         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
4579         cp->Header.SGTotal = cpu_to_le16(use_sg); /* total sgs in cmd list */
4580         return 0;
4581 }
4582
4583 #define IO_ACCEL_INELIGIBLE (1)
4584 static int fixup_ioaccel_cdb(u8 *cdb, int *cdb_len)
4585 {
4586         int is_write = 0;
4587         u32 block;
4588         u32 block_cnt;
4589
4590         /* Perform some CDB fixups if needed using 10 byte reads/writes only */
4591         switch (cdb[0]) {
4592         case WRITE_6:
4593         case WRITE_12:
4594                 is_write = 1;
4595         case READ_6:
4596         case READ_12:
4597                 if (*cdb_len == 6) {
4598                         block = (((cdb[1] & 0x1F) << 16) |
4599                                 (cdb[2] << 8) |
4600                                 cdb[3]);
4601                         block_cnt = cdb[4];
4602                         if (block_cnt == 0)
4603                                 block_cnt = 256;
4604                 } else {
4605                         BUG_ON(*cdb_len != 12);
4606                         block = get_unaligned_be32(&cdb[2]);
4607                         block_cnt = get_unaligned_be32(&cdb[6]);
4608                 }
4609                 if (block_cnt > 0xffff)
4610                         return IO_ACCEL_INELIGIBLE;
4611
4612                 cdb[0] = is_write ? WRITE_10 : READ_10;
4613                 cdb[1] = 0;
4614                 cdb[2] = (u8) (block >> 24);
4615                 cdb[3] = (u8) (block >> 16);
4616                 cdb[4] = (u8) (block >> 8);
4617                 cdb[5] = (u8) (block);
4618                 cdb[6] = 0;
4619                 cdb[7] = (u8) (block_cnt >> 8);
4620                 cdb[8] = (u8) (block_cnt);
4621                 cdb[9] = 0;
4622                 *cdb_len = 10;
4623                 break;
4624         }
4625         return 0;
4626 }
4627
4628 static int hpsa_scsi_ioaccel1_queue_command(struct ctlr_info *h,
4629         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4630         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4631 {
4632         struct scsi_cmnd *cmd = c->scsi_cmd;
4633         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
4634         unsigned int len;
4635         unsigned int total_len = 0;
4636         struct scatterlist *sg;
4637         u64 addr64;
4638         int use_sg, i;
4639         struct SGDescriptor *curr_sg;
4640         u32 control = IOACCEL1_CONTROL_SIMPLEQUEUE;
4641
4642         /* TODO: implement chaining support */
4643         if (scsi_sg_count(cmd) > h->ioaccel_maxsg) {
4644                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4645                 return IO_ACCEL_INELIGIBLE;
4646         }
4647
4648         BUG_ON(cmd->cmd_len > IOACCEL1_IOFLAGS_CDBLEN_MAX);
4649
4650         if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
4651                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4652                 return IO_ACCEL_INELIGIBLE;
4653         }
4654
4655         c->cmd_type = CMD_IOACCEL1;
4656
4657         /* Adjust the DMA address to point to the accelerated command buffer */
4658         c->busaddr = (u32) h->ioaccel_cmd_pool_dhandle +
4659                                 (c->cmdindex * sizeof(*cp));
4660         BUG_ON(c->busaddr & 0x0000007F);
4661
4662         use_sg = scsi_dma_map(cmd);
4663         if (use_sg < 0) {
4664                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4665                 return use_sg;
4666         }
4667
4668         if (use_sg) {
4669                 curr_sg = cp->SG;
4670                 scsi_for_each_sg(cmd, sg, use_sg, i) {
4671                         addr64 = (u64) sg_dma_address(sg);
4672                         len  = sg_dma_len(sg);
4673                         total_len += len;
4674                         curr_sg->Addr = cpu_to_le64(addr64);
4675                         curr_sg->Len = cpu_to_le32(len);
4676                         curr_sg->Ext = cpu_to_le32(0);
4677                         curr_sg++;
4678                 }
4679                 (--curr_sg)->Ext = cpu_to_le32(HPSA_SG_LAST);
4680
4681                 switch (cmd->sc_data_direction) {
4682                 case DMA_TO_DEVICE:
4683                         control |= IOACCEL1_CONTROL_DATA_OUT;
4684                         break;
4685                 case DMA_FROM_DEVICE:
4686                         control |= IOACCEL1_CONTROL_DATA_IN;
4687                         break;
4688                 case DMA_NONE:
4689                         control |= IOACCEL1_CONTROL_NODATAXFER;
4690                         break;
4691                 default:
4692                         dev_err(&h->pdev->dev, "unknown data direction: %d\n",
4693                         cmd->sc_data_direction);
4694                         BUG();
4695                         break;
4696                 }
4697         } else {
4698                 control |= IOACCEL1_CONTROL_NODATAXFER;
4699         }
4700
4701         c->Header.SGList = use_sg;
4702         /* Fill out the command structure to submit */
4703         cp->dev_handle = cpu_to_le16(ioaccel_handle & 0xFFFF);
4704         cp->transfer_len = cpu_to_le32(total_len);
4705         cp->io_flags = cpu_to_le16(IOACCEL1_IOFLAGS_IO_REQ |
4706                         (cdb_len & IOACCEL1_IOFLAGS_CDBLEN_MASK));
4707         cp->control = cpu_to_le32(control);
4708         memcpy(cp->CDB, cdb, cdb_len);
4709         memcpy(cp->CISS_LUN, scsi3addr, 8);
4710         /* Tag was already set at init time. */
4711         enqueue_cmd_and_start_io(h, c);
4712         return 0;
4713 }
4714
4715 /*
4716  * Queue a command directly to a device behind the controller using the
4717  * I/O accelerator path.
4718  */
4719 static int hpsa_scsi_ioaccel_direct_map(struct ctlr_info *h,
4720         struct CommandList *c)
4721 {
4722         struct scsi_cmnd *cmd = c->scsi_cmd;
4723         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4724
4725         if (!dev)
4726                 return -1;
4727
4728         c->phys_disk = dev;
4729
4730         return hpsa_scsi_ioaccel_queue_command(h, c, dev->ioaccel_handle,
4731                 cmd->cmnd, cmd->cmd_len, dev->scsi3addr, dev);
4732 }
4733
4734 /*
4735  * Set encryption parameters for the ioaccel2 request
4736  */
4737 static void set_encrypt_ioaccel2(struct ctlr_info *h,
4738         struct CommandList *c, struct io_accel2_cmd *cp)
4739 {
4740         struct scsi_cmnd *cmd = c->scsi_cmd;
4741         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4742         struct raid_map_data *map = &dev->raid_map;
4743         u64 first_block;
4744
4745         /* Are we doing encryption on this device */
4746         if (!(le16_to_cpu(map->flags) & RAID_MAP_FLAG_ENCRYPT_ON))
4747                 return;
4748         /* Set the data encryption key index. */
4749         cp->dekindex = map->dekindex;
4750
4751         /* Set the encryption enable flag, encoded into direction field. */
4752         cp->direction |= IOACCEL2_DIRECTION_ENCRYPT_MASK;
4753
4754         /* Set encryption tweak values based on logical block address
4755          * If block size is 512, tweak value is LBA.
4756          * For other block sizes, tweak is (LBA * block size)/ 512)
4757          */
4758         switch (cmd->cmnd[0]) {
4759         /* Required? 6-byte cdbs eliminated by fixup_ioaccel_cdb */
4760         case READ_6:
4761         case WRITE_6:
4762                 first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
4763                                 (cmd->cmnd[2] << 8) |
4764                                 cmd->cmnd[3]);
4765                 break;
4766         case WRITE_10:
4767         case READ_10:
4768         /* Required? 12-byte cdbs eliminated by fixup_ioaccel_cdb */
4769         case WRITE_12:
4770         case READ_12:
4771                 first_block = get_unaligned_be32(&cmd->cmnd[2]);
4772                 break;
4773         case WRITE_16:
4774         case READ_16:
4775                 first_block = get_unaligned_be64(&cmd->cmnd[2]);
4776                 break;
4777         default:
4778                 dev_err(&h->pdev->dev,
4779                         "ERROR: %s: size (0x%x) not supported for encryption\n",
4780                         __func__, cmd->cmnd[0]);
4781                 BUG();
4782                 break;
4783         }
4784
4785         if (le32_to_cpu(map->volume_blk_size) != 512)
4786                 first_block = first_block *
4787                                 le32_to_cpu(map->volume_blk_size)/512;
4788
4789         cp->tweak_lower = cpu_to_le32(first_block);
4790         cp->tweak_upper = cpu_to_le32(first_block >> 32);
4791 }
4792
4793 static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
4794         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4795         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4796 {
4797         struct scsi_cmnd *cmd = c->scsi_cmd;
4798         struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
4799         struct ioaccel2_sg_element *curr_sg;
4800         int use_sg, i;
4801         struct scatterlist *sg;
4802         u64 addr64;
4803         u32 len;
4804         u32 total_len = 0;
4805
4806         if (!cmd->device)
4807                 return -1;
4808
4809         if (!cmd->device->hostdata)
4810                 return -1;
4811
4812         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4813
4814         if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
4815                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4816                 return IO_ACCEL_INELIGIBLE;
4817         }
4818
4819         c->cmd_type = CMD_IOACCEL2;
4820         /* Adjust the DMA address to point to the accelerated command buffer */
4821         c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
4822                                 (c->cmdindex * sizeof(*cp));
4823         BUG_ON(c->busaddr & 0x0000007F);
4824
4825         memset(cp, 0, sizeof(*cp));
4826         cp->IU_type = IOACCEL2_IU_TYPE;
4827
4828         use_sg = scsi_dma_map(cmd);
4829         if (use_sg < 0) {
4830                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4831                 return use_sg;
4832         }
4833
4834         if (use_sg) {
4835                 curr_sg = cp->sg;
4836                 if (use_sg > h->ioaccel_maxsg) {
4837                         addr64 = le64_to_cpu(
4838                                 h->ioaccel2_cmd_sg_list[c->cmdindex]->address);
4839                         curr_sg->address = cpu_to_le64(addr64);
4840                         curr_sg->length = 0;
4841                         curr_sg->reserved[0] = 0;
4842                         curr_sg->reserved[1] = 0;
4843                         curr_sg->reserved[2] = 0;
4844                         curr_sg->chain_indicator = 0x80;
4845
4846                         curr_sg = h->ioaccel2_cmd_sg_list[c->cmdindex];
4847                 }
4848                 scsi_for_each_sg(cmd, sg, use_sg, i) {
4849                         addr64 = (u64) sg_dma_address(sg);
4850                         len  = sg_dma_len(sg);
4851                         total_len += len;
4852                         curr_sg->address = cpu_to_le64(addr64);
4853                         curr_sg->length = cpu_to_le32(len);
4854                         curr_sg->reserved[0] = 0;
4855                         curr_sg->reserved[1] = 0;
4856                         curr_sg->reserved[2] = 0;
4857                         curr_sg->chain_indicator = 0;
4858                         curr_sg++;
4859                 }
4860
4861                 switch (cmd->sc_data_direction) {
4862                 case DMA_TO_DEVICE:
4863                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4864                         cp->direction |= IOACCEL2_DIR_DATA_OUT;
4865                         break;
4866                 case DMA_FROM_DEVICE:
4867                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4868                         cp->direction |= IOACCEL2_DIR_DATA_IN;
4869                         break;
4870                 case DMA_NONE:
4871                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4872                         cp->direction |= IOACCEL2_DIR_NO_DATA;
4873                         break;
4874                 default:
4875                         dev_err(&h->pdev->dev, "unknown data direction: %d\n",
4876                                 cmd->sc_data_direction);
4877                         BUG();
4878                         break;
4879                 }
4880         } else {
4881                 cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4882                 cp->direction |= IOACCEL2_DIR_NO_DATA;
4883         }
4884
4885         /* Set encryption parameters, if necessary */
4886         set_encrypt_ioaccel2(h, c, cp);
4887
4888         cp->scsi_nexus = cpu_to_le32(ioaccel_handle);
4889         cp->Tag = cpu_to_le32(c->cmdindex << DIRECT_LOOKUP_SHIFT);
4890         memcpy(cp->cdb, cdb, sizeof(cp->cdb));
4891
4892         cp->data_len = cpu_to_le32(total_len);
4893         cp->err_ptr = cpu_to_le64(c->busaddr +
4894                         offsetof(struct io_accel2_cmd, error_data));
4895         cp->err_len = cpu_to_le32(sizeof(cp->error_data));
4896
4897         /* fill in sg elements */
4898         if (use_sg > h->ioaccel_maxsg) {
4899                 cp->sg_count = 1;
4900                 cp->sg[0].length = cpu_to_le32(use_sg * sizeof(cp->sg[0]));
4901                 if (hpsa_map_ioaccel2_sg_chain_block(h, cp, c)) {
4902                         atomic_dec(&phys_disk->ioaccel_cmds_out);
4903                         scsi_dma_unmap(cmd);
4904                         return -1;
4905                 }
4906         } else
4907                 cp->sg_count = (u8) use_sg;
4908
4909         enqueue_cmd_and_start_io(h, c);
4910         return 0;
4911 }
4912
4913 /*
4914  * Queue a command to the correct I/O accelerator path.
4915  */
4916 static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
4917         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4918         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4919 {
4920         if (!c->scsi_cmd->device)
4921                 return -1;
4922
4923         if (!c->scsi_cmd->device->hostdata)
4924                 return -1;
4925
4926         /* Try to honor the device's queue depth */
4927         if (atomic_inc_return(&phys_disk->ioaccel_cmds_out) >
4928                                         phys_disk->queue_depth) {
4929                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4930                 return IO_ACCEL_INELIGIBLE;
4931         }
4932         if (h->transMethod & CFGTBL_Trans_io_accel1)
4933                 return hpsa_scsi_ioaccel1_queue_command(h, c, ioaccel_handle,
4934                                                 cdb, cdb_len, scsi3addr,
4935                                                 phys_disk);
4936         else
4937                 return hpsa_scsi_ioaccel2_queue_command(h, c, ioaccel_handle,
4938                                                 cdb, cdb_len, scsi3addr,
4939                                                 phys_disk);
4940 }
4941
4942 static void raid_map_helper(struct raid_map_data *map,
4943                 int offload_to_mirror, u32 *map_index, u32 *current_group)
4944 {
4945         if (offload_to_mirror == 0)  {
4946                 /* use physical disk in the first mirrored group. */
4947                 *map_index %= le16_to_cpu(map->data_disks_per_row);
4948                 return;
4949         }
4950         do {
4951                 /* determine mirror group that *map_index indicates */
4952                 *current_group = *map_index /
4953                         le16_to_cpu(map->data_disks_per_row);
4954                 if (offload_to_mirror == *current_group)
4955                         continue;
4956                 if (*current_group < le16_to_cpu(map->layout_map_count) - 1) {
4957                         /* select map index from next group */
4958                         *map_index += le16_to_cpu(map->data_disks_per_row);
4959                         (*current_group)++;
4960                 } else {
4961                         /* select map index from first group */
4962                         *map_index %= le16_to_cpu(map->data_disks_per_row);
4963                         *current_group = 0;
4964                 }
4965         } while (offload_to_mirror != *current_group);
4966 }
4967
4968 /*
4969  * Attempt to perform offload RAID mapping for a logical volume I/O.
4970  */
4971 static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
4972         struct CommandList *c)
4973 {
4974         struct scsi_cmnd *cmd = c->scsi_cmd;
4975         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4976         struct raid_map_data *map = &dev->raid_map;
4977         struct raid_map_disk_data *dd = &map->data[0];
4978         int is_write = 0;
4979         u32 map_index;
4980         u64 first_block, last_block;
4981         u32 block_cnt;
4982         u32 blocks_per_row;
4983         u64 first_row, last_row;
4984         u32 first_row_offset, last_row_offset;
4985         u32 first_column, last_column;
4986         u64 r0_first_row, r0_last_row;
4987         u32 r5or6_blocks_per_row;
4988         u64 r5or6_first_row, r5or6_last_row;
4989         u32 r5or6_first_row_offset, r5or6_last_row_offset;
4990         u32 r5or6_first_column, r5or6_last_column;
4991         u32 total_disks_per_row;
4992         u32 stripesize;
4993         u32 first_group, last_group, current_group;
4994         u32 map_row;
4995         u32 disk_handle;
4996         u64 disk_block;
4997         u32 disk_block_cnt;
4998         u8 cdb[16];
4999         u8 cdb_len;
5000         u16 strip_size;
5001 #if BITS_PER_LONG == 32
5002         u64 tmpdiv;
5003 #endif
5004         int offload_to_mirror;
5005
5006         if (!dev)
5007                 return -1;
5008
5009         /* check for valid opcode, get LBA and block count */
5010         switch (cmd->cmnd[0]) {
5011         case WRITE_6:
5012                 is_write = 1;
5013         case READ_6:
5014                 first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
5015                                 (cmd->cmnd[2] << 8) |
5016                                 cmd->cmnd[3]);
5017                 block_cnt = cmd->cmnd[4];
5018                 if (block_cnt == 0)
5019                         block_cnt = 256;
5020                 break;
5021         case WRITE_10:
5022                 is_write = 1;
5023         case READ_10:
5024                 first_block =
5025                         (((u64) cmd->cmnd[2]) << 24) |
5026                         (((u64) cmd->cmnd[3]) << 16) |
5027                         (((u64) cmd->cmnd[4]) << 8) |
5028                         cmd->cmnd[5];
5029                 block_cnt =
5030                         (((u32) cmd->cmnd[7]) << 8) |
5031                         cmd->cmnd[8];
5032                 break;
5033         case WRITE_12:
5034                 is_write = 1;
5035         case READ_12:
5036                 first_block =
5037                         (((u64) cmd->cmnd[2]) << 24) |
5038                         (((u64) cmd->cmnd[3]) << 16) |
5039                         (((u64) cmd->cmnd[4]) << 8) |
5040                         cmd->cmnd[5];
5041                 block_cnt =
5042                         (((u32) cmd->cmnd[6]) << 24) |
5043                         (((u32) cmd->cmnd[7]) << 16) |
5044                         (((u32) cmd->cmnd[8]) << 8) |
5045                 cmd->cmnd[9];
5046                 break;
5047         case WRITE_16:
5048                 is_write = 1;
5049         case READ_16:
5050                 first_block =
5051                         (((u64) cmd->cmnd[2]) << 56) |
5052                         (((u64) cmd->cmnd[3]) << 48) |
5053                         (((u64) cmd->cmnd[4]) << 40) |
5054                         (((u64) cmd->cmnd[5]) << 32) |
5055                         (((u64) cmd->cmnd[6]) << 24) |
5056                         (((u64) cmd->cmnd[7]) << 16) |
5057                         (((u64) cmd->cmnd[8]) << 8) |
5058                         cmd->cmnd[9];
5059                 block_cnt =
5060                         (((u32) cmd->cmnd[10]) << 24) |
5061                         (((u32) cmd->cmnd[11]) << 16) |
5062                         (((u32) cmd->cmnd[12]) << 8) |
5063                         cmd->cmnd[13];
5064                 break;
5065         default:
5066                 return IO_ACCEL_INELIGIBLE; /* process via normal I/O path */
5067         }
5068         last_block = first_block + block_cnt - 1;
5069
5070         /* check for write to non-RAID-0 */
5071         if (is_write && dev->raid_level != 0)
5072                 return IO_ACCEL_INELIGIBLE;
5073
5074         /* check for invalid block or wraparound */
5075         if (last_block >= le64_to_cpu(map->volume_blk_cnt) ||
5076                 last_block < first_block)
5077                 return IO_ACCEL_INELIGIBLE;
5078
5079         /* calculate stripe information for the request */
5080         blocks_per_row = le16_to_cpu(map->data_disks_per_row) *
5081                                 le16_to_cpu(map->strip_size);
5082         strip_size = le16_to_cpu(map->strip_size);
5083 #if BITS_PER_LONG == 32
5084         tmpdiv = first_block;
5085         (void) do_div(tmpdiv, blocks_per_row);
5086         first_row = tmpdiv;
5087         tmpdiv = last_block;
5088         (void) do_div(tmpdiv, blocks_per_row);
5089         last_row = tmpdiv;
5090         first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
5091         last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
5092         tmpdiv = first_row_offset;
5093         (void) do_div(tmpdiv, strip_size);
5094         first_column = tmpdiv;
5095         tmpdiv = last_row_offset;
5096         (void) do_div(tmpdiv, strip_size);
5097         last_column = tmpdiv;
5098 #else
5099         first_row = first_block / blocks_per_row;
5100         last_row = last_block / blocks_per_row;
5101         first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
5102         last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
5103         first_column = first_row_offset / strip_size;
5104         last_column = last_row_offset / strip_size;
5105 #endif
5106
5107         /* if this isn't a single row/column then give to the controller */
5108         if ((first_row != last_row) || (first_column != last_column))
5109                 return IO_ACCEL_INELIGIBLE;
5110
5111         /* proceeding with driver mapping */
5112         total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
5113                                 le16_to_cpu(map->metadata_disks_per_row);
5114         map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
5115                                 le16_to_cpu(map->row_cnt);
5116         map_index = (map_row * total_disks_per_row) + first_column;
5117
5118         switch (dev->raid_level) {
5119         case HPSA_RAID_0:
5120                 break; /* nothing special to do */
5121         case HPSA_RAID_1:
5122                 /* Handles load balance across RAID 1 members.
5123                  * (2-drive R1 and R10 with even # of drives.)
5124                  * Appropriate for SSDs, not optimal for HDDs
5125                  */
5126                 BUG_ON(le16_to_cpu(map->layout_map_count) != 2);
5127                 if (dev->offload_to_mirror)
5128                         map_index += le16_to_cpu(map->data_disks_per_row);
5129                 dev->offload_to_mirror = !dev->offload_to_mirror;
5130                 break;
5131         case HPSA_RAID_ADM:
5132                 /* Handles N-way mirrors  (R1-ADM)
5133                  * and R10 with # of drives divisible by 3.)
5134                  */
5135                 BUG_ON(le16_to_cpu(map->layout_map_count) != 3);
5136
5137                 offload_to_mirror = dev->offload_to_mirror;
5138                 raid_map_helper(map, offload_to_mirror,
5139                                 &map_index, &current_group);
5140                 /* set mirror group to use next time */
5141                 offload_to_mirror =
5142                         (offload_to_mirror >=
5143                         le16_to_cpu(map->layout_map_count) - 1)
5144                         ? 0 : offload_to_mirror + 1;
5145                 dev->offload_to_mirror = offload_to_mirror;
5146                 /* Avoid direct use of dev->offload_to_mirror within this
5147                  * function since multiple threads might simultaneously
5148                  * increment it beyond the range of dev->layout_map_count -1.
5149                  */
5150                 break;
5151         case HPSA_RAID_5:
5152         case HPSA_RAID_6:
5153                 if (le16_to_cpu(map->layout_map_count) <= 1)
5154                         break;
5155
5156                 /* Verify first and last block are in same RAID group */
5157                 r5or6_blocks_per_row =
5158                         le16_to_cpu(map->strip_size) *
5159                         le16_to_cpu(map->data_disks_per_row);
5160                 BUG_ON(r5or6_blocks_per_row == 0);
5161                 stripesize = r5or6_blocks_per_row *
5162                         le16_to_cpu(map->layout_map_count);
5163 #if BITS_PER_LONG == 32
5164                 tmpdiv = first_block;
5165                 first_group = do_div(tmpdiv, stripesize);
5166                 tmpdiv = first_group;
5167                 (void) do_div(tmpdiv, r5or6_blocks_per_row);
5168                 first_group = tmpdiv;
5169                 tmpdiv = last_block;
5170                 last_group = do_div(tmpdiv, stripesize);
5171                 tmpdiv = last_group;
5172                 (void) do_div(tmpdiv, r5or6_blocks_per_row);
5173                 last_group = tmpdiv;
5174 #else
5175                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
5176                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
5177 #endif
5178                 if (first_group != last_group)
5179                         return IO_ACCEL_INELIGIBLE;
5180
5181                 /* Verify request is in a single row of RAID 5/6 */
5182 #if BITS_PER_LONG == 32
5183                 tmpdiv = first_block;
5184                 (void) do_div(tmpdiv, stripesize);
5185                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
5186                 tmpdiv = last_block;
5187                 (void) do_div(tmpdiv, stripesize);
5188                 r5or6_last_row = r0_last_row = tmpdiv;
5189 #else
5190                 first_row = r5or6_first_row = r0_first_row =
5191                                                 first_block / stripesize;
5192                 r5or6_last_row = r0_last_row = last_block / stripesize;
5193 #endif
5194                 if (r5or6_first_row != r5or6_last_row)
5195                         return IO_ACCEL_INELIGIBLE;
5196
5197
5198                 /* Verify request is in a single column */
5199 #if BITS_PER_LONG == 32
5200                 tmpdiv = first_block;
5201                 first_row_offset = do_div(tmpdiv, stripesize);
5202                 tmpdiv = first_row_offset;
5203                 first_row_offset = (u32) do_div(tmpdiv, r5or6_blocks_per_row);
5204                 r5or6_first_row_offset = first_row_offset;
5205                 tmpdiv = last_block;
5206                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
5207                 tmpdiv = r5or6_last_row_offset;
5208                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
5209                 tmpdiv = r5or6_first_row_offset;
5210                 (void) do_div(tmpdiv, map->strip_size);
5211                 first_column = r5or6_first_column = tmpdiv;
5212                 tmpdiv = r5or6_last_row_offset;
5213                 (void) do_div(tmpdiv, map->strip_size);
5214                 r5or6_last_column = tmpdiv;
5215 #else
5216                 first_row_offset = r5or6_first_row_offset =
5217                         (u32)((first_block % stripesize) %
5218                                                 r5or6_blocks_per_row);
5219
5220                 r5or6_last_row_offset =
5221                         (u32)((last_block % stripesize) %
5222                                                 r5or6_blocks_per_row);
5223
5224                 first_column = r5or6_first_column =
5225                         r5or6_first_row_offset / le16_to_cpu(map->strip_size);
5226                 r5or6_last_column =
5227                         r5or6_last_row_offset / le16_to_cpu(map->strip_size);
5228 #endif
5229                 if (r5or6_first_column != r5or6_last_column)
5230                         return IO_ACCEL_INELIGIBLE;
5231
5232                 /* Request is eligible */
5233                 map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
5234                         le16_to_cpu(map->row_cnt);
5235
5236                 map_index = (first_group *
5237                         (le16_to_cpu(map->row_cnt) * total_disks_per_row)) +
5238                         (map_row * total_disks_per_row) + first_column;
5239                 break;
5240         default:
5241                 return IO_ACCEL_INELIGIBLE;
5242         }
5243
5244         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
5245                 return IO_ACCEL_INELIGIBLE;
5246
5247         c->phys_disk = dev->phys_disk[map_index];
5248         if (!c->phys_disk)
5249                 return IO_ACCEL_INELIGIBLE;
5250
5251         disk_handle = dd[map_index].ioaccel_handle;
5252         disk_block = le64_to_cpu(map->disk_starting_blk) +
5253                         first_row * le16_to_cpu(map->strip_size) +
5254                         (first_row_offset - first_column *
5255                         le16_to_cpu(map->strip_size));
5256         disk_block_cnt = block_cnt;
5257
5258         /* handle differing logical/physical block sizes */
5259         if (map->phys_blk_shift) {
5260                 disk_block <<= map->phys_blk_shift;
5261                 disk_block_cnt <<= map->phys_blk_shift;
5262         }
5263         BUG_ON(disk_block_cnt > 0xffff);
5264
5265         /* build the new CDB for the physical disk I/O */
5266         if (disk_block > 0xffffffff) {
5267                 cdb[0] = is_write ? WRITE_16 : READ_16;
5268                 cdb[1] = 0;
5269                 cdb[2] = (u8) (disk_block >> 56);
5270                 cdb[3] = (u8) (disk_block >> 48);
5271                 cdb[4] = (u8) (disk_block >> 40);
5272                 cdb[5] = (u8) (disk_block >> 32);
5273                 cdb[6] = (u8) (disk_block >> 24);
5274                 cdb[7] = (u8) (disk_block >> 16);
5275                 cdb[8] = (u8) (disk_block >> 8);
5276                 cdb[9] = (u8) (disk_block);
5277                 cdb[10] = (u8) (disk_block_cnt >> 24);
5278                 cdb[11] = (u8) (disk_block_cnt >> 16);
5279                 cdb[12] = (u8) (disk_block_cnt >> 8);
5280                 cdb[13] = (u8) (disk_block_cnt);
5281                 cdb[14] = 0;
5282                 cdb[15] = 0;
5283                 cdb_len = 16;
5284         } else {
5285                 cdb[0] = is_write ? WRITE_10 : READ_10;
5286                 cdb[1] = 0;
5287                 cdb[2] = (u8) (disk_block >> 24);
5288                 cdb[3] = (u8) (disk_block >> 16);
5289                 cdb[4] = (u8) (disk_block >> 8);
5290                 cdb[5] = (u8) (disk_block);
5291                 cdb[6] = 0;
5292                 cdb[7] = (u8) (disk_block_cnt >> 8);
5293                 cdb[8] = (u8) (disk_block_cnt);
5294                 cdb[9] = 0;
5295                 cdb_len = 10;
5296         }
5297         return hpsa_scsi_ioaccel_queue_command(h, c, disk_handle, cdb, cdb_len,
5298                                                 dev->scsi3addr,
5299                                                 dev->phys_disk[map_index]);
5300 }
5301
5302 /*
5303  * Submit commands down the "normal" RAID stack path
5304  * All callers to hpsa_ciss_submit must check lockup_detected
5305  * beforehand, before (opt.) and after calling cmd_alloc
5306  */
5307 static int hpsa_ciss_submit(struct ctlr_info *h,
5308         struct CommandList *c, struct scsi_cmnd *cmd,
5309         unsigned char scsi3addr[])
5310 {
5311         cmd->host_scribble = (unsigned char *) c;
5312         c->cmd_type = CMD_SCSI;
5313         c->scsi_cmd = cmd;
5314         c->Header.ReplyQueue = 0;  /* unused in simple mode */
5315         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
5316         c->Header.tag = cpu_to_le64((c->cmdindex << DIRECT_LOOKUP_SHIFT));
5317
5318         /* Fill in the request block... */
5319
5320         c->Request.Timeout = 0;
5321         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
5322         c->Request.CDBLen = cmd->cmd_len;
5323         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
5324         switch (cmd->sc_data_direction) {
5325         case DMA_TO_DEVICE:
5326                 c->Request.type_attr_dir =
5327                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_WRITE);
5328                 break;
5329         case DMA_FROM_DEVICE:
5330                 c->Request.type_attr_dir =
5331                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_READ);
5332                 break;
5333         case DMA_NONE:
5334                 c->Request.type_attr_dir =
5335                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_NONE);
5336                 break;
5337         case DMA_BIDIRECTIONAL:
5338                 /* This can happen if a buggy application does a scsi passthru
5339                  * and sets both inlen and outlen to non-zero. ( see
5340                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
5341                  */
5342
5343                 c->Request.type_attr_dir =
5344                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_RSVD);
5345                 /* This is technically wrong, and hpsa controllers should
5346                  * reject it with CMD_INVALID, which is the most correct
5347                  * response, but non-fibre backends appear to let it
5348                  * slide by, and give the same results as if this field
5349                  * were set correctly.  Either way is acceptable for
5350                  * our purposes here.
5351                  */
5352
5353                 break;
5354
5355         default:
5356                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
5357                         cmd->sc_data_direction);
5358                 BUG();
5359                 break;
5360         }
5361
5362         if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
5363                 hpsa_cmd_resolve_and_free(h, c);
5364                 return SCSI_MLQUEUE_HOST_BUSY;
5365         }
5366         enqueue_cmd_and_start_io(h, c);
5367         /* the cmd'll come back via intr handler in complete_scsi_command()  */
5368         return 0;
5369 }
5370
5371 static void hpsa_cmd_init(struct ctlr_info *h, int index,
5372                                 struct CommandList *c)
5373 {
5374         dma_addr_t cmd_dma_handle, err_dma_handle;
5375
5376         /* Zero out all of commandlist except the last field, refcount */
5377         memset(c, 0, offsetof(struct CommandList, refcount));
5378         c->Header.tag = cpu_to_le64((u64) (index << DIRECT_LOOKUP_SHIFT));
5379         cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
5380         c->err_info = h->errinfo_pool + index;
5381         memset(c->err_info, 0, sizeof(*c->err_info));
5382         err_dma_handle = h->errinfo_pool_dhandle
5383             + index * sizeof(*c->err_info);
5384         c->cmdindex = index;
5385         c->busaddr = (u32) cmd_dma_handle;
5386         c->ErrDesc.Addr = cpu_to_le64((u64) err_dma_handle);
5387         c->ErrDesc.Len = cpu_to_le32((u32) sizeof(*c->err_info));
5388         c->h = h;
5389         c->scsi_cmd = SCSI_CMD_IDLE;
5390 }
5391
5392 static void hpsa_preinitialize_commands(struct ctlr_info *h)
5393 {
5394         int i;
5395
5396         for (i = 0; i < h->nr_cmds; i++) {
5397                 struct CommandList *c = h->cmd_pool + i;
5398
5399                 hpsa_cmd_init(h, i, c);
5400                 atomic_set(&c->refcount, 0);
5401         }
5402 }
5403
5404 static inline void hpsa_cmd_partial_init(struct ctlr_info *h, int index,
5405                                 struct CommandList *c)
5406 {
5407         dma_addr_t cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
5408
5409         BUG_ON(c->cmdindex != index);
5410
5411         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
5412         memset(c->err_info, 0, sizeof(*c->err_info));
5413         c->busaddr = (u32) cmd_dma_handle;
5414 }
5415
5416 static int hpsa_ioaccel_submit(struct ctlr_info *h,
5417                 struct CommandList *c, struct scsi_cmnd *cmd,
5418                 unsigned char *scsi3addr)
5419 {
5420         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
5421         int rc = IO_ACCEL_INELIGIBLE;
5422
5423         if (!dev)
5424                 return SCSI_MLQUEUE_HOST_BUSY;
5425
5426         cmd->host_scribble = (unsigned char *) c;
5427
5428         if (dev->offload_enabled) {
5429                 hpsa_cmd_init(h, c->cmdindex, c);
5430                 c->cmd_type = CMD_SCSI;
5431                 c->scsi_cmd = cmd;
5432                 rc = hpsa_scsi_ioaccel_raid_map(h, c);
5433                 if (rc < 0)     /* scsi_dma_map failed. */
5434                         rc = SCSI_MLQUEUE_HOST_BUSY;
5435         } else if (dev->hba_ioaccel_enabled) {
5436                 hpsa_cmd_init(h, c->cmdindex, c);
5437                 c->cmd_type = CMD_SCSI;
5438                 c->scsi_cmd = cmd;
5439                 rc = hpsa_scsi_ioaccel_direct_map(h, c);
5440                 if (rc < 0)     /* scsi_dma_map failed. */
5441                         rc = SCSI_MLQUEUE_HOST_BUSY;
5442         }
5443         return rc;
5444 }
5445
5446 static void hpsa_command_resubmit_worker(struct work_struct *work)
5447 {
5448         struct scsi_cmnd *cmd;
5449         struct hpsa_scsi_dev_t *dev;
5450         struct CommandList *c = container_of(work, struct CommandList, work);
5451
5452         cmd = c->scsi_cmd;
5453         dev = cmd->device->hostdata;
5454         if (!dev) {
5455                 cmd->result = DID_NO_CONNECT << 16;
5456                 return hpsa_cmd_free_and_done(c->h, c, cmd);
5457         }
5458         if (c->reset_pending)
5459                 return hpsa_cmd_resolve_and_free(c->h, c);
5460         if (c->abort_pending)
5461                 return hpsa_cmd_abort_and_free(c->h, c, cmd);
5462         if (c->cmd_type == CMD_IOACCEL2) {
5463                 struct ctlr_info *h = c->h;
5464                 struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
5465                 int rc;
5466
5467                 if (c2->error_data.serv_response ==
5468                                 IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL) {
5469                         rc = hpsa_ioaccel_submit(h, c, cmd, dev->scsi3addr);
5470                         if (rc == 0)
5471                                 return;
5472                         if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5473                                 /*
5474                                  * If we get here, it means dma mapping failed.
5475                                  * Try again via scsi mid layer, which will
5476                                  * then get SCSI_MLQUEUE_HOST_BUSY.
5477                                  */
5478                                 cmd->result = DID_IMM_RETRY << 16;
5479                                 return hpsa_cmd_free_and_done(h, c, cmd);
5480                         }
5481                         /* else, fall thru and resubmit down CISS path */
5482                 }
5483         }
5484         hpsa_cmd_partial_init(c->h, c->cmdindex, c);
5485         if (hpsa_ciss_submit(c->h, c, cmd, dev->scsi3addr)) {
5486                 /*
5487                  * If we get here, it means dma mapping failed. Try
5488                  * again via scsi mid layer, which will then get
5489                  * SCSI_MLQUEUE_HOST_BUSY.
5490                  *
5491                  * hpsa_ciss_submit will have already freed c
5492                  * if it encountered a dma mapping failure.
5493                  */
5494                 cmd->result = DID_IMM_RETRY << 16;
5495                 cmd->scsi_done(cmd);
5496         }
5497 }
5498
5499 /* Running in struct Scsi_Host->host_lock less mode */
5500 static int hpsa_scsi_queue_command(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
5501 {
5502         struct ctlr_info *h;
5503         struct hpsa_scsi_dev_t *dev;
5504         unsigned char scsi3addr[8];
5505         struct CommandList *c;
5506         int rc = 0;
5507
5508         /* Get the ptr to our adapter structure out of cmd->host. */
5509         h = sdev_to_hba(cmd->device);
5510
5511         BUG_ON(cmd->request->tag < 0);
5512
5513         dev = cmd->device->hostdata;
5514         if (!dev) {
5515                 cmd->result = DID_NO_CONNECT << 16;
5516                 cmd->scsi_done(cmd);
5517                 return 0;
5518         }
5519
5520         if (dev->removed) {
5521                 cmd->result = DID_NO_CONNECT << 16;
5522                 cmd->scsi_done(cmd);
5523                 return 0;
5524         }
5525
5526         memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
5527
5528         if (unlikely(lockup_detected(h))) {
5529                 cmd->result = DID_NO_CONNECT << 16;
5530                 cmd->scsi_done(cmd);
5531                 return 0;
5532         }
5533         c = cmd_tagged_alloc(h, cmd);
5534
5535         /*
5536          * Call alternate submit routine for I/O accelerated commands.
5537          * Retries always go down the normal I/O path.
5538          */
5539         if (likely(cmd->retries == 0 &&
5540                         !blk_rq_is_passthrough(cmd->request) &&
5541                         h->acciopath_status)) {
5542                 rc = hpsa_ioaccel_submit(h, c, cmd, scsi3addr);
5543                 if (rc == 0)
5544                         return 0;
5545                 if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5546                         hpsa_cmd_resolve_and_free(h, c);
5547                         return SCSI_MLQUEUE_HOST_BUSY;
5548                 }
5549         }
5550         return hpsa_ciss_submit(h, c, cmd, scsi3addr);
5551 }
5552
5553 static void hpsa_scan_complete(struct ctlr_info *h)
5554 {
5555         unsigned long flags;
5556
5557         spin_lock_irqsave(&h->scan_lock, flags);
5558         h->scan_finished = 1;
5559         wake_up(&h->scan_wait_queue);
5560         spin_unlock_irqrestore(&h->scan_lock, flags);
5561 }
5562
5563 static void hpsa_scan_start(struct Scsi_Host *sh)
5564 {
5565         struct ctlr_info *h = shost_to_hba(sh);
5566         unsigned long flags;
5567
5568         /*
5569          * Don't let rescans be initiated on a controller known to be locked
5570          * up.  If the controller locks up *during* a rescan, that thread is
5571          * probably hosed, but at least we can prevent new rescan threads from
5572          * piling up on a locked up controller.
5573          */
5574         if (unlikely(lockup_detected(h)))
5575                 return hpsa_scan_complete(h);
5576
5577         /*
5578          * If a scan is already waiting to run, no need to add another
5579          */
5580         spin_lock_irqsave(&h->scan_lock, flags);
5581         if (h->scan_waiting) {
5582                 spin_unlock_irqrestore(&h->scan_lock, flags);
5583                 return;
5584         }
5585
5586         spin_unlock_irqrestore(&h->scan_lock, flags);
5587
5588         /* wait until any scan already in progress is finished. */
5589         while (1) {
5590                 spin_lock_irqsave(&h->scan_lock, flags);
5591                 if (h->scan_finished)
5592                         break;
5593                 h->scan_waiting = 1;
5594                 spin_unlock_irqrestore(&h->scan_lock, flags);
5595                 wait_event(h->scan_wait_queue, h->scan_finished);
5596                 /* Note: We don't need to worry about a race between this
5597                  * thread and driver unload because the midlayer will
5598                  * have incremented the reference count, so unload won't
5599                  * happen if we're in here.
5600                  */
5601         }
5602         h->scan_finished = 0; /* mark scan as in progress */
5603         h->scan_waiting = 0;
5604         spin_unlock_irqrestore(&h->scan_lock, flags);
5605
5606         if (unlikely(lockup_detected(h)))
5607                 return hpsa_scan_complete(h);
5608
5609         /*
5610          * Do the scan after a reset completion
5611          */
5612         if (h->reset_in_progress) {
5613                 h->drv_req_rescan = 1;
5614                 return;
5615         }
5616
5617         hpsa_update_scsi_devices(h);
5618
5619         hpsa_scan_complete(h);
5620 }
5621
5622 static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth)
5623 {
5624         struct hpsa_scsi_dev_t *logical_drive = sdev->hostdata;
5625
5626         if (!logical_drive)
5627                 return -ENODEV;
5628
5629         if (qdepth < 1)
5630                 qdepth = 1;
5631         else if (qdepth > logical_drive->queue_depth)
5632                 qdepth = logical_drive->queue_depth;
5633
5634         return scsi_change_queue_depth(sdev, qdepth);
5635 }
5636
5637 static int hpsa_scan_finished(struct Scsi_Host *sh,
5638         unsigned long elapsed_time)
5639 {
5640         struct ctlr_info *h = shost_to_hba(sh);
5641         unsigned long flags;
5642         int finished;
5643
5644         spin_lock_irqsave(&h->scan_lock, flags);
5645         finished = h->scan_finished;
5646         spin_unlock_irqrestore(&h->scan_lock, flags);
5647         return finished;
5648 }
5649
5650 static int hpsa_scsi_host_alloc(struct ctlr_info *h)
5651 {
5652         struct Scsi_Host *sh;
5653
5654         sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
5655         if (sh == NULL) {
5656                 dev_err(&h->pdev->dev, "scsi_host_alloc failed\n");
5657                 return -ENOMEM;
5658         }
5659
5660         sh->io_port = 0;
5661         sh->n_io_port = 0;
5662         sh->this_id = -1;
5663         sh->max_channel = 3;
5664         sh->max_cmd_len = MAX_COMMAND_SIZE;
5665         sh->max_lun = HPSA_MAX_LUN;
5666         sh->max_id = HPSA_MAX_LUN;
5667         sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
5668         sh->cmd_per_lun = sh->can_queue;
5669         sh->sg_tablesize = h->maxsgentries;
5670         sh->transportt = hpsa_sas_transport_template;
5671         sh->hostdata[0] = (unsigned long) h;
5672         sh->irq = pci_irq_vector(h->pdev, 0);
5673         sh->unique_id = sh->irq;
5674
5675         h->scsi_host = sh;
5676         return 0;
5677 }
5678
5679 static int hpsa_scsi_add_host(struct ctlr_info *h)
5680 {
5681         int rv;
5682
5683         rv = scsi_add_host(h->scsi_host, &h->pdev->dev);
5684         if (rv) {
5685                 dev_err(&h->pdev->dev, "scsi_add_host failed\n");
5686                 return rv;
5687         }
5688         scsi_scan_host(h->scsi_host);
5689         return 0;
5690 }
5691
5692 /*
5693  * The block layer has already gone to the trouble of picking out a unique,
5694  * small-integer tag for this request.  We use an offset from that value as
5695  * an index to select our command block.  (The offset allows us to reserve the
5696  * low-numbered entries for our own uses.)
5697  */
5698 static int hpsa_get_cmd_index(struct scsi_cmnd *scmd)
5699 {
5700         int idx = scmd->request->tag;
5701
5702         if (idx < 0)
5703                 return idx;
5704
5705         /* Offset to leave space for internal cmds. */
5706         return idx += HPSA_NRESERVED_CMDS;
5707 }
5708
5709 /*
5710  * Send a TEST_UNIT_READY command to the specified LUN using the specified
5711  * reply queue; returns zero if the unit is ready, and non-zero otherwise.
5712  */
5713 static int hpsa_send_test_unit_ready(struct ctlr_info *h,
5714                                 struct CommandList *c, unsigned char lunaddr[],
5715                                 int reply_queue)
5716 {
5717         int rc;
5718
5719         /* Send the Test Unit Ready, fill_cmd can't fail, no mapping */
5720         (void) fill_cmd(c, TEST_UNIT_READY, h,
5721                         NULL, 0, 0, lunaddr, TYPE_CMD);
5722         rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
5723         if (rc)
5724                 return rc;
5725         /* no unmap needed here because no data xfer. */
5726
5727         /* Check if the unit is already ready. */
5728         if (c->err_info->CommandStatus == CMD_SUCCESS)
5729                 return 0;
5730
5731         /*
5732          * The first command sent after reset will receive "unit attention" to
5733          * indicate that the LUN has been reset...this is actually what we're
5734          * looking for (but, success is good too).
5735          */
5736         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
5737                 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
5738                         (c->err_info->SenseInfo[2] == NO_SENSE ||
5739                          c->err_info->SenseInfo[2] == UNIT_ATTENTION))
5740                 return 0;
5741
5742         return 1;
5743 }
5744
5745 /*
5746  * Wait for a TEST_UNIT_READY command to complete, retrying as necessary;
5747  * returns zero when the unit is ready, and non-zero when giving up.
5748  */
5749 static int hpsa_wait_for_test_unit_ready(struct ctlr_info *h,
5750                                 struct CommandList *c,
5751                                 unsigned char lunaddr[], int reply_queue)
5752 {
5753         int rc;
5754         int count = 0;
5755         int waittime = 1; /* seconds */
5756
5757         /* Send test unit ready until device ready, or give up. */
5758         for (count = 0; count < HPSA_TUR_RETRY_LIMIT; count++) {
5759
5760                 /*
5761                  * Wait for a bit.  do this first, because if we send
5762                  * the TUR right away, the reset will just abort it.
5763                  */
5764                 msleep(1000 * waittime);
5765
5766                 rc = hpsa_send_test_unit_ready(h, c, lunaddr, reply_queue);
5767                 if (!rc)
5768                         break;
5769
5770                 /* Increase wait time with each try, up to a point. */
5771                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
5772                         waittime *= 2;
5773
5774                 dev_warn(&h->pdev->dev,
5775                          "waiting %d secs for device to become ready.\n",
5776                          waittime);
5777         }
5778
5779         return rc;
5780 }
5781
5782 static int wait_for_device_to_become_ready(struct ctlr_info *h,
5783                                            unsigned char lunaddr[],
5784                                            int reply_queue)
5785 {
5786         int first_queue;
5787         int last_queue;
5788         int rq;
5789         int rc = 0;
5790         struct CommandList *c;
5791
5792         c = cmd_alloc(h);
5793
5794         /*
5795          * If no specific reply queue was requested, then send the TUR
5796          * repeatedly, requesting a reply on each reply queue; otherwise execute
5797          * the loop exactly once using only the specified queue.
5798          */
5799         if (reply_queue == DEFAULT_REPLY_QUEUE) {
5800                 first_queue = 0;
5801                 last_queue = h->nreply_queues - 1;
5802         } else {
5803                 first_queue = reply_queue;
5804                 last_queue = reply_queue;
5805         }
5806
5807         for (rq = first_queue; rq <= last_queue; rq++) {
5808                 rc = hpsa_wait_for_test_unit_ready(h, c, lunaddr, rq);
5809                 if (rc)
5810                         break;
5811         }
5812
5813         if (rc)
5814                 dev_warn(&h->pdev->dev, "giving up on device.\n");
5815         else
5816                 dev_warn(&h->pdev->dev, "device is ready.\n");
5817
5818         cmd_free(h, c);
5819         return rc;
5820 }
5821
5822 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
5823  * complaining.  Doing a host- or bus-reset can't do anything good here.
5824  */
5825 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
5826 {
5827         int rc;
5828         struct ctlr_info *h;
5829         struct hpsa_scsi_dev_t *dev;
5830         u8 reset_type;
5831         char msg[48];
5832
5833         /* find the controller to which the command to be aborted was sent */
5834         h = sdev_to_hba(scsicmd->device);
5835         if (h == NULL) /* paranoia */
5836                 return FAILED;
5837
5838         if (lockup_detected(h))
5839                 return FAILED;
5840
5841         dev = scsicmd->device->hostdata;
5842         if (!dev) {
5843                 dev_err(&h->pdev->dev, "%s: device lookup failed\n", __func__);
5844                 return FAILED;
5845         }
5846
5847         /* if controller locked up, we can guarantee command won't complete */
5848         if (lockup_detected(h)) {
5849                 snprintf(msg, sizeof(msg),
5850                          "cmd %d RESET FAILED, lockup detected",
5851                          hpsa_get_cmd_index(scsicmd));
5852                 hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5853                 return FAILED;
5854         }
5855
5856         /* this reset request might be the result of a lockup; check */
5857         if (detect_controller_lockup(h)) {
5858                 snprintf(msg, sizeof(msg),
5859                          "cmd %d RESET FAILED, new lockup detected",
5860                          hpsa_get_cmd_index(scsicmd));
5861                 hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5862                 return FAILED;
5863         }
5864
5865         /* Do not attempt on controller */
5866         if (is_hba_lunid(dev->scsi3addr))
5867                 return SUCCESS;
5868
5869         if (is_logical_dev_addr_mode(dev->scsi3addr))
5870                 reset_type = HPSA_DEVICE_RESET_MSG;
5871         else
5872                 reset_type = HPSA_PHYS_TARGET_RESET;
5873
5874         sprintf(msg, "resetting %s",
5875                 reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ");
5876         hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5877
5878         h->reset_in_progress = 1;
5879
5880         /* send a reset to the SCSI LUN which the command was sent to */
5881         rc = hpsa_do_reset(h, dev, dev->scsi3addr, reset_type,
5882                            DEFAULT_REPLY_QUEUE);
5883         sprintf(msg, "reset %s %s",
5884                 reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ",
5885                 rc == 0 ? "completed successfully" : "failed");
5886         hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5887         h->reset_in_progress = 0;
5888         return rc == 0 ? SUCCESS : FAILED;
5889 }
5890
5891 static void swizzle_abort_tag(u8 *tag)
5892 {
5893         u8 original_tag[8];
5894
5895         memcpy(original_tag, tag, 8);
5896         tag[0] = original_tag[3];
5897         tag[1] = original_tag[2];
5898         tag[2] = original_tag[1];
5899         tag[3] = original_tag[0];
5900         tag[4] = original_tag[7];
5901         tag[5] = original_tag[6];
5902         tag[6] = original_tag[5];
5903         tag[7] = original_tag[4];
5904 }
5905
5906 static void hpsa_get_tag(struct ctlr_info *h,
5907         struct CommandList *c, __le32 *taglower, __le32 *tagupper)
5908 {
5909         u64 tag;
5910         if (c->cmd_type == CMD_IOACCEL1) {
5911                 struct io_accel1_cmd *cm1 = (struct io_accel1_cmd *)
5912                         &h->ioaccel_cmd_pool[c->cmdindex];
5913                 tag = le64_to_cpu(cm1->tag);
5914                 *tagupper = cpu_to_le32(tag >> 32);
5915                 *taglower = cpu_to_le32(tag);
5916                 return;
5917         }
5918         if (c->cmd_type == CMD_IOACCEL2) {
5919                 struct io_accel2_cmd *cm2 = (struct io_accel2_cmd *)
5920                         &h->ioaccel2_cmd_pool[c->cmdindex];
5921                 /* upper tag not used in ioaccel2 mode */
5922                 memset(tagupper, 0, sizeof(*tagupper));
5923                 *taglower = cm2->Tag;
5924                 return;
5925         }
5926         tag = le64_to_cpu(c->Header.tag);
5927         *tagupper = cpu_to_le32(tag >> 32);
5928         *taglower = cpu_to_le32(tag);
5929 }
5930
5931 static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
5932         struct CommandList *abort, int reply_queue)
5933 {
5934         int rc = IO_OK;
5935         struct CommandList *c;
5936         struct ErrorInfo *ei;
5937         __le32 tagupper, taglower;
5938
5939         c = cmd_alloc(h);
5940
5941         /* fill_cmd can't fail here, no buffer to map */
5942         (void) fill_cmd(c, HPSA_ABORT_MSG, h, &abort->Header.tag,
5943                 0, 0, scsi3addr, TYPE_MSG);
5944         if (h->needs_abort_tags_swizzled)
5945                 swizzle_abort_tag(&c->Request.CDB[4]);
5946         (void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
5947         hpsa_get_tag(h, abort, &taglower, &tagupper);
5948         dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd(abort) completed.\n",
5949                 __func__, tagupper, taglower);
5950         /* no unmap needed here because no data xfer. */
5951
5952         ei = c->err_info;
5953         switch (ei->CommandStatus) {
5954         case CMD_SUCCESS:
5955                 break;
5956         case CMD_TMF_STATUS:
5957                 rc = hpsa_evaluate_tmf_status(h, c);
5958                 break;
5959         case CMD_UNABORTABLE: /* Very common, don't make noise. */
5960                 rc = -1;
5961                 break;
5962         default:
5963                 dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: interpreting error.\n",
5964                         __func__, tagupper, taglower);
5965                 hpsa_scsi_interpret_error(h, c);
5966                 rc = -1;
5967                 break;
5968         }
5969         cmd_free(h, c);
5970         dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n",
5971                 __func__, tagupper, taglower);
5972         return rc;
5973 }
5974
5975 static void setup_ioaccel2_abort_cmd(struct CommandList *c, struct ctlr_info *h,
5976         struct CommandList *command_to_abort, int reply_queue)
5977 {
5978         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
5979         struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;
5980         struct io_accel2_cmd *c2a =
5981                 &h->ioaccel2_cmd_pool[command_to_abort->cmdindex];
5982         struct scsi_cmnd *scmd = command_to_abort->scsi_cmd;
5983         struct hpsa_scsi_dev_t *dev = scmd->device->hostdata;
5984
5985         if (!dev)
5986                 return;
5987
5988         /*
5989          * We're overlaying struct hpsa_tmf_struct on top of something which
5990          * was allocated as a struct io_accel2_cmd, so we better be sure it
5991          * actually fits, and doesn't overrun the error info space.
5992          */
5993         BUILD_BUG_ON(sizeof(struct hpsa_tmf_struct) >
5994                         sizeof(struct io_accel2_cmd));
5995         BUG_ON(offsetof(struct io_accel2_cmd, error_data) <
5996                         offsetof(struct hpsa_tmf_struct, error_len) +
5997                                 sizeof(ac->error_len));
5998
5999         c->cmd_type = IOACCEL2_TMF;
6000         c->scsi_cmd = SCSI_CMD_BUSY;
6001
6002         /* Adjust the DMA address to point to the accelerated command buffer */
6003         c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
6004                                 (c->cmdindex * sizeof(struct io_accel2_cmd));
6005         BUG_ON(c->busaddr & 0x0000007F);
6006
6007         memset(ac, 0, sizeof(*c2)); /* yes this is correct */
6008         ac->iu_type = IOACCEL2_IU_TMF_TYPE;
6009         ac->reply_queue = reply_queue;
6010         ac->tmf = IOACCEL2_TMF_ABORT;
6011         ac->it_nexus = cpu_to_le32(dev->ioaccel_handle);
6012         memset(ac->lun_id, 0, sizeof(ac->lun_id));
6013         ac->tag = cpu_to_le64(c->cmdindex << DIRECT_LOOKUP_SHIFT);
6014         ac->abort_tag = cpu_to_le64(le32_to_cpu(c2a->Tag));
6015         ac->error_ptr = cpu_to_le64(c->busaddr +
6016                         offsetof(struct io_accel2_cmd, error_data));
6017         ac->error_len = cpu_to_le32(sizeof(c2->error_data));
6018 }
6019
6020 /* ioaccel2 path firmware cannot handle abort task requests.
6021  * Change abort requests to physical target reset, and send to the
6022  * address of the physical disk used for the ioaccel 2 command.
6023  * Return 0 on success (IO_OK)
6024  *       -1 on failure
6025  */
6026
6027 static int hpsa_send_reset_as_abort_ioaccel2(struct ctlr_info *h,
6028         unsigned char *scsi3addr, struct CommandList *abort, int reply_queue)
6029 {
6030         int rc = IO_OK;
6031         struct scsi_cmnd *scmd; /* scsi command within request being aborted */
6032         struct hpsa_scsi_dev_t *dev; /* device to which scsi cmd was sent */
6033         unsigned char phys_scsi3addr[8]; /* addr of phys disk with volume */
6034         unsigned char *psa = &phys_scsi3addr[0];
6035
6036         /* Get a pointer to the hpsa logical device. */
6037         scmd = abort->scsi_cmd;
6038         dev = (struct hpsa_scsi_dev_t *)(scmd->device->hostdata);
6039         if (dev == NULL) {
6040                 dev_warn(&h->pdev->dev,
6041                         "Cannot abort: no device pointer for command.\n");
6042                         return -1; /* not abortable */
6043         }
6044
6045         if (h->raid_offload_debug > 0)
6046                 dev_info(&h->pdev->dev,
6047                         "scsi %d:%d:%d:%d %s scsi3addr 0x%8phN\n",
6048                         h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
6049                         "Reset as abort", scsi3addr);
6050
6051         if (!dev->offload_enabled) {
6052                 dev_warn(&h->pdev->dev,
6053                         "Can't abort: device is not operating in HP SSD Smart Path mode.\n");
6054                 return -1; /* not abortable */
6055         }
6056
6057         /* Incoming scsi3addr is logical addr. We need physical disk addr. */
6058         if (!hpsa_get_pdisk_of_ioaccel2(h, abort, psa)) {
6059                 dev_warn(&h->pdev->dev, "Can't abort: Failed lookup of physical address.\n");
6060                 return -1; /* not abortable */
6061         }
6062
6063         /* send the reset */
6064         if (h->raid_offload_debug > 0)
6065                 dev_info(&h->pdev->dev,
6066                         "Reset as abort: Resetting physical device at scsi3addr 0x%8phN\n",
6067                         psa);
6068         rc = hpsa_do_reset(h, dev, psa, HPSA_PHYS_TARGET_RESET, reply_queue);
6069         if (rc != 0) {
6070                 dev_warn(&h->pdev->dev,
6071                         "Reset as abort: Failed on physical device at scsi3addr 0x%8phN\n",
6072                         psa);
6073                 return rc; /* failed to reset */
6074         }
6075
6076         /* wait for device to recover */
6077         if (wait_for_device_to_become_ready(h, psa, reply_queue) != 0) {
6078                 dev_warn(&h->pdev->dev,
6079                         "Reset as abort: Failed: Device never recovered from reset: 0x%8phN\n",
6080                         psa);
6081                 return -1;  /* failed to recover */
6082         }
6083
6084         /* device recovered */
6085         dev_info(&h->pdev->dev,
6086                 "Reset as abort: Device recovered from reset: scsi3addr 0x%8phN\n",
6087                 psa);
6088
6089         return rc; /* success */
6090 }
6091
6092 static int hpsa_send_abort_ioaccel2(struct ctlr_info *h,
6093         struct CommandList *abort, int reply_queue)
6094 {
6095         int rc = IO_OK;
6096         struct CommandList *c;
6097         __le32 taglower, tagupper;
6098         struct hpsa_scsi_dev_t *dev;
6099         struct io_accel2_cmd *c2;
6100
6101         dev = abort->scsi_cmd->device->hostdata;
6102         if (!dev)
6103                 return -1;
6104
6105         if (!dev->offload_enabled && !dev->hba_ioaccel_enabled)
6106                 return -1;
6107
6108         c = cmd_alloc(h);
6109         setup_ioaccel2_abort_cmd(c, h, abort, reply_queue);
6110         c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
6111         (void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
6112         hpsa_get_tag(h, abort, &taglower, &tagupper);
6113         dev_dbg(&h->pdev->dev,
6114                 "%s: Tag:0x%08x:%08x: do_simple_cmd(ioaccel2 abort) completed.\n",
6115                 __func__, tagupper, taglower);
6116         /* no unmap needed here because no data xfer. */
6117
6118         dev_dbg(&h->pdev->dev,
6119                 "%s: Tag:0x%08x:%08x: abort service response = 0x%02x.\n",
6120                 __func__, tagupper, taglower, c2->error_data.serv_response);
6121         switch (c2->error_data.serv_response) {
6122         case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
6123         case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
6124                 rc = 0;
6125                 break;
6126         case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
6127         case IOACCEL2_SERV_RESPONSE_FAILURE:
6128         case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
6129                 rc = -1;
6130                 break;
6131         default:
6132                 dev_warn(&h->pdev->dev,
6133                         "%s: Tag:0x%08x:%08x: unknown abort service response 0x%02x\n",
6134                         __func__, tagupper, taglower,
6135                         c2->error_data.serv_response);
6136                 rc = -1;
6137         }
6138         cmd_free(h, c);
6139         dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n", __func__,
6140                 tagupper, taglower);
6141         return rc;
6142 }
6143
6144 static int hpsa_send_abort_both_ways(struct ctlr_info *h,
6145         struct hpsa_scsi_dev_t *dev, struct CommandList *abort, int reply_queue)
6146 {
6147         /*
6148          * ioccelerator mode 2 commands should be aborted via the
6149          * accelerated path, since RAID path is unaware of these commands,
6150          * but not all underlying firmware can handle abort TMF.
6151          * Change abort to physical device reset when abort TMF is unsupported.
6152          */
6153         if (abort->cmd_type == CMD_IOACCEL2) {
6154                 if ((HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags) ||
6155                         dev->physical_device)
6156                         return hpsa_send_abort_ioaccel2(h, abort,
6157                                                 reply_queue);
6158                 else
6159                         return hpsa_send_reset_as_abort_ioaccel2(h,
6160                                                         dev->scsi3addr,
6161                                                         abort, reply_queue);
6162         }
6163         return hpsa_send_abort(h, dev->scsi3addr, abort, reply_queue);
6164 }
6165
6166 /* Find out which reply queue a command was meant to return on */
6167 static int hpsa_extract_reply_queue(struct ctlr_info *h,
6168                                         struct CommandList *c)
6169 {
6170         if (c->cmd_type == CMD_IOACCEL2)
6171                 return h->ioaccel2_cmd_pool[c->cmdindex].reply_queue;
6172         return c->Header.ReplyQueue;
6173 }
6174
6175 /*
6176  * Limit concurrency of abort commands to prevent
6177  * over-subscription of commands
6178  */
6179 static inline int wait_for_available_abort_cmd(struct ctlr_info *h)
6180 {
6181 #define ABORT_CMD_WAIT_MSECS 5000
6182         return !wait_event_timeout(h->abort_cmd_wait_queue,
6183                         atomic_dec_if_positive(&h->abort_cmds_available) >= 0,
6184                         msecs_to_jiffies(ABORT_CMD_WAIT_MSECS));
6185 }
6186
6187 /* Send an abort for the specified command.
6188  *      If the device and controller support it,
6189  *              send a task abort request.
6190  */
6191 static int hpsa_eh_abort_handler(struct scsi_cmnd *sc)
6192 {
6193
6194         int rc;
6195         struct ctlr_info *h;
6196         struct hpsa_scsi_dev_t *dev;
6197         struct CommandList *abort; /* pointer to command to be aborted */
6198         struct scsi_cmnd *as;   /* ptr to scsi cmd inside aborted command. */
6199         char msg[256];          /* For debug messaging. */
6200         int ml = 0;
6201         __le32 tagupper, taglower;
6202         int refcount, reply_queue;
6203
6204         if (sc == NULL)
6205                 return FAILED;
6206
6207         if (sc->device == NULL)
6208                 return FAILED;
6209
6210         /* Find the controller of the command to be aborted */
6211         h = sdev_to_hba(sc->device);
6212         if (h == NULL)
6213                 return FAILED;
6214
6215         /* Find the device of the command to be aborted */
6216         dev = sc->device->hostdata;
6217         if (!dev) {
6218                 dev_err(&h->pdev->dev, "%s FAILED, Device lookup failed.\n",
6219                                 msg);
6220                 return FAILED;
6221         }
6222
6223         /* If controller locked up, we can guarantee command won't complete */
6224         if (lockup_detected(h)) {
6225                 hpsa_show_dev_msg(KERN_WARNING, h, dev,
6226                                         "ABORT FAILED, lockup detected");
6227                 return FAILED;
6228         }
6229
6230         /* This is a good time to check if controller lockup has occurred */
6231         if (detect_controller_lockup(h)) {
6232                 hpsa_show_dev_msg(KERN_WARNING, h, dev,
6233                                         "ABORT FAILED, new lockup detected");
6234                 return FAILED;
6235         }
6236
6237         /* Check that controller supports some kind of task abort */
6238         if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags) &&
6239                 !(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
6240                 return FAILED;
6241
6242         memset(msg, 0, sizeof(msg));
6243         ml += sprintf(msg+ml, "scsi %d:%d:%d:%llu %s %p",
6244                 h->scsi_host->host_no, sc->device->channel,
6245                 sc->device->id, sc->device->lun,
6246                 "Aborting command", sc);
6247
6248         /* Get SCSI command to be aborted */
6249         abort = (struct CommandList *) sc->host_scribble;
6250         if (abort == NULL) {
6251                 /* This can happen if the command already completed. */
6252                 return SUCCESS;
6253         }
6254         refcount = atomic_inc_return(&abort->refcount);
6255         if (refcount == 1) { /* Command is done already. */
6256                 cmd_free(h, abort);
6257                 return SUCCESS;
6258         }
6259
6260         /* Don't bother trying the abort if we know it won't work. */
6261         if (abort->cmd_type != CMD_IOACCEL2 &&
6262                 abort->cmd_type != CMD_IOACCEL1 && !dev->supports_aborts) {
6263                 cmd_free(h, abort);
6264                 return FAILED;
6265         }
6266
6267         /*
6268          * Check that we're aborting the right command.
6269          * It's possible the CommandList already completed and got re-used.
6270          */
6271         if (abort->scsi_cmd != sc) {
6272                 cmd_free(h, abort);
6273                 return SUCCESS;
6274         }
6275
6276         abort->abort_pending = true;
6277         hpsa_get_tag(h, abort, &taglower, &tagupper);
6278         reply_queue = hpsa_extract_reply_queue(h, abort);
6279         ml += sprintf(msg+ml, "Tag:0x%08x:%08x ", tagupper, taglower);
6280         as  = abort->scsi_cmd;
6281         if (as != NULL)
6282                 ml += sprintf(msg+ml,
6283                         "CDBLen: %d CDB: 0x%02x%02x... SN: 0x%lx ",
6284                         as->cmd_len, as->cmnd[0], as->cmnd[1],
6285                         as->serial_number);
6286         dev_warn(&h->pdev->dev, "%s BEING SENT\n", msg);
6287         hpsa_show_dev_msg(KERN_WARNING, h, dev, "Aborting command");
6288
6289         /*
6290          * Command is in flight, or possibly already completed
6291          * by the firmware (but not to the scsi mid layer) but we can't
6292          * distinguish which.  Send the abort down.
6293          */
6294         if (wait_for_available_abort_cmd(h)) {
6295                 dev_warn(&h->pdev->dev,
6296                         "%s FAILED, timeout waiting for an abort command to become available.\n",
6297                         msg);
6298                 cmd_free(h, abort);
6299                 return FAILED;
6300         }
6301         rc = hpsa_send_abort_both_ways(h, dev, abort, reply_queue);
6302         atomic_inc(&h->abort_cmds_available);
6303         wake_up_all(&h->abort_cmd_wait_queue);
6304         if (rc != 0) {
6305                 dev_warn(&h->pdev->dev, "%s SENT, FAILED\n", msg);
6306                 hpsa_show_dev_msg(KERN_WARNING, h, dev,
6307                                 "FAILED to abort command");
6308                 cmd_free(h, abort);
6309                 return FAILED;
6310         }
6311         dev_info(&h->pdev->dev, "%s SENT, SUCCESS\n", msg);
6312         wait_event(h->event_sync_wait_queue,
6313                    abort->scsi_cmd != sc || lockup_detected(h));
6314         cmd_free(h, abort);
6315         return !lockup_detected(h) ? SUCCESS : FAILED;
6316 }
6317
6318 /*
6319  * For operations with an associated SCSI command, a command block is allocated
6320  * at init, and managed by cmd_tagged_alloc() and cmd_tagged_free() using the
6321  * block request tag as an index into a table of entries.  cmd_tagged_free() is
6322  * the complement, although cmd_free() may be called instead.
6323  */
6324 static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
6325                                             struct scsi_cmnd *scmd)
6326 {
6327         int idx = hpsa_get_cmd_index(scmd);
6328         struct CommandList *c = h->cmd_pool + idx;
6329
6330         if (idx < HPSA_NRESERVED_CMDS || idx >= h->nr_cmds) {
6331                 dev_err(&h->pdev->dev, "Bad block tag: %d not in [%d..%d]\n",
6332                         idx, HPSA_NRESERVED_CMDS, h->nr_cmds - 1);
6333                 /* The index value comes from the block layer, so if it's out of
6334                  * bounds, it's probably not our bug.
6335                  */
6336                 BUG();
6337         }
6338
6339         atomic_inc(&c->refcount);
6340         if (unlikely(!hpsa_is_cmd_idle(c))) {
6341                 /*
6342                  * We expect that the SCSI layer will hand us a unique tag
6343                  * value.  Thus, there should never be a collision here between
6344                  * two requests...because if the selected command isn't idle
6345                  * then someone is going to be very disappointed.
6346                  */
6347                 dev_err(&h->pdev->dev,
6348                         "tag collision (tag=%d) in cmd_tagged_alloc().\n",
6349                         idx);
6350                 if (c->scsi_cmd != NULL)
6351                         scsi_print_command(c->scsi_cmd);
6352                 scsi_print_command(scmd);
6353         }
6354
6355         hpsa_cmd_partial_init(h, idx, c);
6356         return c;
6357 }
6358
6359 static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c)
6360 {
6361         /*
6362          * Release our reference to the block.  We don't need to do anything
6363          * else to free it, because it is accessed by index.  (There's no point
6364          * in checking the result of the decrement, since we cannot guarantee
6365          * that there isn't a concurrent abort which is also accessing it.)
6366          */
6367         (void)atomic_dec(&c->refcount);
6368 }
6369
6370 /*
6371  * For operations that cannot sleep, a command block is allocated at init,
6372  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
6373  * which ones are free or in use.  Lock must be held when calling this.
6374  * cmd_free() is the complement.
6375  * This function never gives up and returns NULL.  If it hangs,
6376  * another thread must call cmd_free() to free some tags.
6377  */
6378
6379 static struct CommandList *cmd_alloc(struct ctlr_info *h)
6380 {
6381         struct CommandList *c;
6382         int refcount, i;
6383         int offset = 0;
6384
6385         /*
6386          * There is some *extremely* small but non-zero chance that that
6387          * multiple threads could get in here, and one thread could
6388          * be scanning through the list of bits looking for a free
6389          * one, but the free ones are always behind him, and other
6390          * threads sneak in behind him and eat them before he can
6391          * get to them, so that while there is always a free one, a
6392          * very unlucky thread might be starved anyway, never able to
6393          * beat the other threads.  In reality, this happens so
6394          * infrequently as to be indistinguishable from never.
6395          *
6396          * Note that we start allocating commands before the SCSI host structure
6397          * is initialized.  Since the search starts at bit zero, this
6398          * all works, since we have at least one command structure available;
6399          * however, it means that the structures with the low indexes have to be
6400          * reserved for driver-initiated requests, while requests from the block
6401          * layer will use the higher indexes.
6402          */
6403
6404         for (;;) {
6405                 i = find_next_zero_bit(h->cmd_pool_bits,
6406                                         HPSA_NRESERVED_CMDS,
6407                                         offset);
6408                 if (unlikely(i >= HPSA_NRESERVED_CMDS)) {
6409                         offset = 0;
6410                         continue;
6411                 }
6412                 c = h->cmd_pool + i;
6413                 refcount = atomic_inc_return(&c->refcount);
6414                 if (unlikely(refcount > 1)) {
6415                         cmd_free(h, c); /* already in use */
6416                         offset = (i + 1) % HPSA_NRESERVED_CMDS;
6417                         continue;
6418                 }
6419                 set_bit(i & (BITS_PER_LONG - 1),
6420                         h->cmd_pool_bits + (i / BITS_PER_LONG));
6421                 break; /* it's ours now. */
6422         }
6423         hpsa_cmd_partial_init(h, i, c);
6424         return c;
6425 }
6426
6427 /*
6428  * This is the complementary operation to cmd_alloc().  Note, however, in some
6429  * corner cases it may also be used to free blocks allocated by
6430  * cmd_tagged_alloc() in which case the ref-count decrement does the trick and
6431  * the clear-bit is harmless.
6432  */
6433 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
6434 {
6435         if (atomic_dec_and_test(&c->refcount)) {
6436                 int i;
6437
6438                 i = c - h->cmd_pool;
6439                 clear_bit(i & (BITS_PER_LONG - 1),
6440                           h->cmd_pool_bits + (i / BITS_PER_LONG));
6441         }
6442 }
6443
6444 #ifdef CONFIG_COMPAT
6445
6446 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd,
6447         void __user *arg)
6448 {
6449         IOCTL32_Command_struct __user *arg32 =
6450             (IOCTL32_Command_struct __user *) arg;
6451         IOCTL_Command_struct arg64;
6452         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
6453         int err;
6454         u32 cp;
6455
6456         memset(&arg64, 0, sizeof(arg64));
6457         err = 0;
6458         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
6459                            sizeof(arg64.LUN_info));
6460         err |= copy_from_user(&arg64.Request, &arg32->Request,
6461                            sizeof(arg64.Request));
6462         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
6463                            sizeof(arg64.error_info));
6464         err |= get_user(arg64.buf_size, &arg32->buf_size);
6465         err |= get_user(cp, &arg32->buf);
6466         arg64.buf = compat_ptr(cp);
6467         err |= copy_to_user(p, &arg64, sizeof(arg64));
6468
6469         if (err)
6470                 return -EFAULT;
6471
6472         err = hpsa_ioctl(dev, CCISS_PASSTHRU, p);
6473         if (err)
6474                 return err;
6475         err |= copy_in_user(&arg32->error_info, &p->error_info,
6476                          sizeof(arg32->error_info));
6477         if (err)
6478                 return -EFAULT;
6479         return err;
6480 }
6481
6482 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
6483         int cmd, void __user *arg)
6484 {
6485         BIG_IOCTL32_Command_struct __user *arg32 =
6486             (BIG_IOCTL32_Command_struct __user *) arg;
6487         BIG_IOCTL_Command_struct arg64;
6488         BIG_IOCTL_Command_struct __user *p =
6489             compat_alloc_user_space(sizeof(arg64));
6490         int err;
6491         u32 cp;
6492
6493         memset(&arg64, 0, sizeof(arg64));
6494         err = 0;
6495         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
6496                            sizeof(arg64.LUN_info));
6497         err |= copy_from_user(&arg64.Request, &arg32->Request,
6498                            sizeof(arg64.Request));
6499         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
6500                            sizeof(arg64.error_info));
6501         err |= get_user(arg64.buf_size, &arg32->buf_size);
6502         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
6503         err |= get_user(cp, &arg32->buf);
6504         arg64.buf = compat_ptr(cp);
6505         err |= copy_to_user(p, &arg64, sizeof(arg64));
6506
6507         if (err)
6508                 return -EFAULT;
6509
6510         err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, p);
6511         if (err)
6512                 return err;
6513         err |= copy_in_user(&arg32->error_info, &p->error_info,
6514                          sizeof(arg32->error_info));
6515         if (err)
6516                 return -EFAULT;
6517         return err;
6518 }
6519
6520 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
6521 {
6522         switch (cmd) {
6523         case CCISS_GETPCIINFO:
6524         case CCISS_GETINTINFO:
6525         case CCISS_SETINTINFO:
6526         case CCISS_GETNODENAME:
6527         case CCISS_SETNODENAME:
6528         case CCISS_GETHEARTBEAT:
6529         case CCISS_GETBUSTYPES:
6530         case CCISS_GETFIRMVER:
6531         case CCISS_GETDRIVVER:
6532         case CCISS_REVALIDVOLS:
6533         case CCISS_DEREGDISK:
6534         case CCISS_REGNEWDISK:
6535         case CCISS_REGNEWD:
6536         case CCISS_RESCANDISK:
6537         case CCISS_GETLUNINFO:
6538                 return hpsa_ioctl(dev, cmd, arg);
6539
6540         case CCISS_PASSTHRU32:
6541                 return hpsa_ioctl32_passthru(dev, cmd, arg);
6542         case CCISS_BIG_PASSTHRU32:
6543                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
6544
6545         default:
6546                 return -ENOIOCTLCMD;
6547         }
6548 }
6549 #endif
6550
6551 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
6552 {
6553         struct hpsa_pci_info pciinfo;
6554
6555         if (!argp)
6556                 return -EINVAL;
6557         pciinfo.domain = pci_domain_nr(h->pdev->bus);
6558         pciinfo.bus = h->pdev->bus->number;
6559         pciinfo.dev_fn = h->pdev->devfn;
6560         pciinfo.board_id = h->board_id;
6561         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
6562                 return -EFAULT;
6563         return 0;
6564 }
6565
6566 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
6567 {
6568         DriverVer_type DriverVer;
6569         unsigned char vmaj, vmin, vsubmin;
6570         int rc;
6571
6572         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
6573                 &vmaj, &vmin, &vsubmin);
6574         if (rc != 3) {
6575                 dev_info(&h->pdev->dev, "driver version string '%s' "
6576                         "unrecognized.", HPSA_DRIVER_VERSION);
6577                 vmaj = 0;
6578                 vmin = 0;
6579                 vsubmin = 0;
6580         }
6581         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
6582         if (!argp)
6583                 return -EINVAL;
6584         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
6585                 return -EFAULT;
6586         return 0;
6587 }
6588
6589 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
6590 {
6591         IOCTL_Command_struct iocommand;
6592         struct CommandList *c;
6593         char *buff = NULL;
6594         u64 temp64;
6595         int rc = 0;
6596
6597         if (!argp)
6598                 return -EINVAL;
6599         if (!capable(CAP_SYS_RAWIO))
6600                 return -EPERM;
6601         if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
6602                 return -EFAULT;
6603         if ((iocommand.buf_size < 1) &&
6604             (iocommand.Request.Type.Direction != XFER_NONE)) {
6605                 return -EINVAL;
6606         }
6607         if (iocommand.buf_size > 0) {
6608                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
6609                 if (buff == NULL)
6610                         return -ENOMEM;
6611                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
6612                         /* Copy the data into the buffer we created */
6613                         if (copy_from_user(buff, iocommand.buf,
6614                                 iocommand.buf_size)) {
6615                                 rc = -EFAULT;
6616                                 goto out_kfree;
6617                         }
6618                 } else {
6619                         memset(buff, 0, iocommand.buf_size);
6620                 }
6621         }
6622         c = cmd_alloc(h);
6623
6624         /* Fill in the command type */
6625         c->cmd_type = CMD_IOCTL_PEND;
6626         c->scsi_cmd = SCSI_CMD_BUSY;
6627         /* Fill in Command Header */
6628         c->Header.ReplyQueue = 0; /* unused in simple mode */
6629         if (iocommand.buf_size > 0) {   /* buffer to fill */
6630                 c->Header.SGList = 1;
6631                 c->Header.SGTotal = cpu_to_le16(1);
6632         } else  { /* no buffers to fill */
6633                 c->Header.SGList = 0;
6634                 c->Header.SGTotal = cpu_to_le16(0);
6635         }
6636         memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
6637
6638         /* Fill in Request block */
6639         memcpy(&c->Request, &iocommand.Request,
6640                 sizeof(c->Request));
6641
6642         /* Fill in the scatter gather information */
6643         if (iocommand.buf_size > 0) {
6644                 temp64 = pci_map_single(h->pdev, buff,
6645                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
6646                 if (dma_mapping_error(&h->pdev->dev, (dma_addr_t) temp64)) {
6647                         c->SG[0].Addr = cpu_to_le64(0);
6648                         c->SG[0].Len = cpu_to_le32(0);
6649                         rc = -ENOMEM;
6650                         goto out;
6651                 }
6652                 c->SG[0].Addr = cpu_to_le64(temp64);
6653                 c->SG[0].Len = cpu_to_le32(iocommand.buf_size);
6654                 c->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* not chaining */
6655         }
6656         rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6657                                         NO_TIMEOUT);
6658         if (iocommand.buf_size > 0)
6659                 hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
6660         check_ioctl_unit_attention(h, c);
6661         if (rc) {
6662                 rc = -EIO;
6663                 goto out;
6664         }
6665
6666         /* Copy the error information out */
6667         memcpy(&iocommand.error_info, c->err_info,
6668                 sizeof(iocommand.error_info));
6669         if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
6670                 rc = -EFAULT;
6671                 goto out;
6672         }
6673         if ((iocommand.Request.Type.Direction & XFER_READ) &&
6674                 iocommand.buf_size > 0) {
6675                 /* Copy the data out of the buffer we created */
6676                 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
6677                         rc = -EFAULT;
6678                         goto out;
6679                 }
6680         }
6681 out:
6682         cmd_free(h, c);
6683 out_kfree:
6684         kfree(buff);
6685         return rc;
6686 }
6687
6688 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
6689 {
6690         BIG_IOCTL_Command_struct *ioc;
6691         struct CommandList *c;
6692         unsigned char **buff = NULL;
6693         int *buff_size = NULL;
6694         u64 temp64;
6695         BYTE sg_used = 0;
6696         int status = 0;
6697         u32 left;
6698         u32 sz;
6699         BYTE __user *data_ptr;
6700
6701         if (!argp)
6702                 return -EINVAL;
6703         if (!capable(CAP_SYS_RAWIO))
6704                 return -EPERM;
6705         ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
6706         if (!ioc) {
6707                 status = -ENOMEM;
6708                 goto cleanup1;
6709         }
6710         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
6711                 status = -EFAULT;
6712                 goto cleanup1;
6713         }
6714         if ((ioc->buf_size < 1) &&
6715             (ioc->Request.Type.Direction != XFER_NONE)) {
6716                 status = -EINVAL;
6717                 goto cleanup1;
6718         }
6719         /* Check kmalloc limits  using all SGs */
6720         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
6721                 status = -EINVAL;
6722                 goto cleanup1;
6723         }
6724         if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
6725                 status = -EINVAL;
6726                 goto cleanup1;
6727         }
6728         buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
6729         if (!buff) {
6730                 status = -ENOMEM;
6731                 goto cleanup1;
6732         }
6733         buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
6734         if (!buff_size) {
6735                 status = -ENOMEM;
6736                 goto cleanup1;
6737         }
6738         left = ioc->buf_size;
6739         data_ptr = ioc->buf;
6740         while (left) {
6741                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
6742                 buff_size[sg_used] = sz;
6743                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
6744                 if (buff[sg_used] == NULL) {
6745                         status = -ENOMEM;
6746                         goto cleanup1;
6747                 }
6748                 if (ioc->Request.Type.Direction & XFER_WRITE) {
6749                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
6750                                 status = -EFAULT;
6751                                 goto cleanup1;
6752                         }
6753                 } else
6754                         memset(buff[sg_used], 0, sz);
6755                 left -= sz;
6756                 data_ptr += sz;
6757                 sg_used++;
6758         }
6759         c = cmd_alloc(h);
6760
6761         c->cmd_type = CMD_IOCTL_PEND;
6762         c->scsi_cmd = SCSI_CMD_BUSY;
6763         c->Header.ReplyQueue = 0;
6764         c->Header.SGList = (u8) sg_used;
6765         c->Header.SGTotal = cpu_to_le16(sg_used);
6766         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
6767         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
6768         if (ioc->buf_size > 0) {
6769                 int i;
6770                 for (i = 0; i < sg_used; i++) {
6771                         temp64 = pci_map_single(h->pdev, buff[i],
6772                                     buff_size[i], PCI_DMA_BIDIRECTIONAL);
6773                         if (dma_mapping_error(&h->pdev->dev,
6774                                                         (dma_addr_t) temp64)) {
6775                                 c->SG[i].Addr = cpu_to_le64(0);
6776                                 c->SG[i].Len = cpu_to_le32(0);
6777                                 hpsa_pci_unmap(h->pdev, c, i,
6778                                         PCI_DMA_BIDIRECTIONAL);
6779                                 status = -ENOMEM;
6780                                 goto cleanup0;
6781                         }
6782                         c->SG[i].Addr = cpu_to_le64(temp64);
6783                         c->SG[i].Len = cpu_to_le32(buff_size[i]);
6784                         c->SG[i].Ext = cpu_to_le32(0);
6785                 }
6786                 c->SG[--i].Ext = cpu_to_le32(HPSA_SG_LAST);
6787         }
6788         status = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6789                                                 NO_TIMEOUT);
6790         if (sg_used)
6791                 hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
6792         check_ioctl_unit_attention(h, c);
6793         if (status) {
6794                 status = -EIO;
6795                 goto cleanup0;
6796         }
6797
6798         /* Copy the error information out */
6799         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
6800         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
6801                 status = -EFAULT;
6802                 goto cleanup0;
6803         }
6804         if ((ioc->Request.Type.Direction & XFER_READ) && ioc->buf_size > 0) {
6805                 int i;
6806
6807                 /* Copy the data out of the buffer we created */
6808                 BYTE __user *ptr = ioc->buf;
6809                 for (i = 0; i < sg_used; i++) {
6810                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
6811                                 status = -EFAULT;
6812                                 goto cleanup0;
6813                         }
6814                         ptr += buff_size[i];
6815                 }
6816         }
6817         status = 0;
6818 cleanup0:
6819         cmd_free(h, c);
6820 cleanup1:
6821         if (buff) {
6822                 int i;
6823
6824                 for (i = 0; i < sg_used; i++)
6825                         kfree(buff[i]);
6826                 kfree(buff);
6827         }
6828         kfree(buff_size);
6829         kfree(ioc);
6830         return status;
6831 }
6832
6833 static void check_ioctl_unit_attention(struct ctlr_info *h,
6834         struct CommandList *c)
6835 {
6836         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
6837                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
6838                 (void) check_for_unit_attention(h, c);
6839 }
6840
6841 /*
6842  * ioctl
6843  */
6844 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
6845 {
6846         struct ctlr_info *h;
6847         void __user *argp = (void __user *)arg;
6848         int rc;
6849
6850         h = sdev_to_hba(dev);
6851
6852         switch (cmd) {
6853         case CCISS_DEREGDISK:
6854         case CCISS_REGNEWDISK:
6855         case CCISS_REGNEWD:
6856                 hpsa_scan_start(h->scsi_host);
6857                 return 0;
6858         case CCISS_GETPCIINFO:
6859                 return hpsa_getpciinfo_ioctl(h, argp);
6860         case CCISS_GETDRIVVER:
6861                 return hpsa_getdrivver_ioctl(h, argp);
6862         case CCISS_PASSTHRU:
6863                 if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6864                         return -EAGAIN;
6865                 rc = hpsa_passthru_ioctl(h, argp);
6866                 atomic_inc(&h->passthru_cmds_avail);
6867                 return rc;
6868         case CCISS_BIG_PASSTHRU:
6869                 if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6870                         return -EAGAIN;
6871                 rc = hpsa_big_passthru_ioctl(h, argp);
6872                 atomic_inc(&h->passthru_cmds_avail);
6873                 return rc;
6874         default:
6875                 return -ENOTTY;
6876         }
6877 }
6878
6879 static void hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
6880                                 u8 reset_type)
6881 {
6882         struct CommandList *c;
6883
6884         c = cmd_alloc(h);
6885
6886         /* fill_cmd can't fail here, no data buffer to map */
6887         (void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
6888                 RAID_CTLR_LUNID, TYPE_MSG);
6889         c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
6890         c->waiting = NULL;
6891         enqueue_cmd_and_start_io(h, c);
6892         /* Don't wait for completion, the reset won't complete.  Don't free
6893          * the command either.  This is the last command we will send before
6894          * re-initializing everything, so it doesn't matter and won't leak.
6895          */
6896         return;
6897 }
6898
6899 static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
6900         void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
6901         int cmd_type)
6902 {
6903         int pci_dir = XFER_NONE;
6904         u64 tag; /* for commands to be aborted */
6905
6906         c->cmd_type = CMD_IOCTL_PEND;
6907         c->scsi_cmd = SCSI_CMD_BUSY;
6908         c->Header.ReplyQueue = 0;
6909         if (buff != NULL && size > 0) {
6910                 c->Header.SGList = 1;
6911                 c->Header.SGTotal = cpu_to_le16(1);
6912         } else {
6913                 c->Header.SGList = 0;
6914                 c->Header.SGTotal = cpu_to_le16(0);
6915         }
6916         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
6917
6918         if (cmd_type == TYPE_CMD) {
6919                 switch (cmd) {
6920                 case HPSA_INQUIRY:
6921                         /* are we trying to read a vital product page */
6922                         if (page_code & VPD_PAGE) {
6923                                 c->Request.CDB[1] = 0x01;
6924                                 c->Request.CDB[2] = (page_code & 0xff);
6925                         }
6926                         c->Request.CDBLen = 6;
6927                         c->Request.type_attr_dir =
6928                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6929                         c->Request.Timeout = 0;
6930                         c->Request.CDB[0] = HPSA_INQUIRY;
6931                         c->Request.CDB[4] = size & 0xFF;
6932                         break;
6933                 case HPSA_REPORT_LOG:
6934                 case HPSA_REPORT_PHYS:
6935                         /* Talking to controller so It's a physical command
6936                            mode = 00 target = 0.  Nothing to write.
6937                          */
6938                         c->Request.CDBLen = 12;
6939                         c->Request.type_attr_dir =
6940                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6941                         c->Request.Timeout = 0;
6942                         c->Request.CDB[0] = cmd;
6943                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
6944                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6945                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6946                         c->Request.CDB[9] = size & 0xFF;
6947                         break;
6948                 case BMIC_SENSE_DIAG_OPTIONS:
6949                         c->Request.CDBLen = 16;
6950                         c->Request.type_attr_dir =
6951                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6952                         c->Request.Timeout = 0;
6953                         /* Spec says this should be BMIC_WRITE */
6954                         c->Request.CDB[0] = BMIC_READ;
6955                         c->Request.CDB[6] = BMIC_SENSE_DIAG_OPTIONS;
6956                         break;
6957                 case BMIC_SET_DIAG_OPTIONS:
6958                         c->Request.CDBLen = 16;
6959                         c->Request.type_attr_dir =
6960                                         TYPE_ATTR_DIR(cmd_type,
6961                                                 ATTR_SIMPLE, XFER_WRITE);
6962                         c->Request.Timeout = 0;
6963                         c->Request.CDB[0] = BMIC_WRITE;
6964                         c->Request.CDB[6] = BMIC_SET_DIAG_OPTIONS;
6965                         break;
6966                 case HPSA_CACHE_FLUSH:
6967                         c->Request.CDBLen = 12;
6968                         c->Request.type_attr_dir =
6969                                         TYPE_ATTR_DIR(cmd_type,
6970                                                 ATTR_SIMPLE, XFER_WRITE);
6971                         c->Request.Timeout = 0;
6972                         c->Request.CDB[0] = BMIC_WRITE;
6973                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
6974                         c->Request.CDB[7] = (size >> 8) & 0xFF;
6975                         c->Request.CDB[8] = size & 0xFF;
6976                         break;
6977                 case TEST_UNIT_READY:
6978                         c->Request.CDBLen = 6;
6979                         c->Request.type_attr_dir =
6980                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6981                         c->Request.Timeout = 0;
6982                         break;
6983                 case HPSA_GET_RAID_MAP:
6984                         c->Request.CDBLen = 12;
6985                         c->Request.type_attr_dir =
6986                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6987                         c->Request.Timeout = 0;
6988                         c->Request.CDB[0] = HPSA_CISS_READ;
6989                         c->Request.CDB[1] = cmd;
6990                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
6991                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6992                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6993                         c->Request.CDB[9] = size & 0xFF;
6994                         break;
6995                 case BMIC_SENSE_CONTROLLER_PARAMETERS:
6996                         c->Request.CDBLen = 10;
6997                         c->Request.type_attr_dir =
6998                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6999                         c->Request.Timeout = 0;
7000                         c->Request.CDB[0] = BMIC_READ;
7001                         c->Request.CDB[6] = BMIC_SENSE_CONTROLLER_PARAMETERS;
7002                         c->Request.CDB[7] = (size >> 16) & 0xFF;
7003                         c->Request.CDB[8] = (size >> 8) & 0xFF;
7004                         break;
7005                 case BMIC_IDENTIFY_PHYSICAL_DEVICE:
7006                         c->Request.CDBLen = 10;
7007                         c->Request.type_attr_dir =
7008                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
7009                         c->Request.Timeout = 0;
7010                         c->Request.CDB[0] = BMIC_READ;
7011                         c->Request.CDB[6] = BMIC_IDENTIFY_PHYSICAL_DEVICE;
7012                         c->Request.CDB[7] = (size >> 16) & 0xFF;
7013                         c->Request.CDB[8] = (size >> 8) & 0XFF;
7014                         break;
7015                 case BMIC_SENSE_SUBSYSTEM_INFORMATION:
7016                         c->Request.CDBLen = 10;
7017                         c->Request.type_attr_dir =
7018                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
7019                         c->Request.Timeout = 0;
7020                         c->Request.CDB[0] = BMIC_READ;
7021                         c->Request.CDB[6] = BMIC_SENSE_SUBSYSTEM_INFORMATION;
7022                         c->Request.CDB[7] = (size >> 16) & 0xFF;
7023                         c->Request.CDB[8] = (size >> 8) & 0XFF;
7024                         break;
7025                 case BMIC_SENSE_STORAGE_BOX_PARAMS:
7026                         c->Request.CDBLen = 10;
7027                         c->Request.type_attr_dir =
7028                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
7029                         c->Request.Timeout = 0;
7030                         c->Request.CDB[0] = BMIC_READ;
7031                         c->Request.CDB[6] = BMIC_SENSE_STORAGE_BOX_PARAMS;
7032                         c->Request.CDB[7] = (size >> 16) & 0xFF;
7033                         c->Request.CDB[8] = (size >> 8) & 0XFF;
7034                         break;
7035                 case BMIC_IDENTIFY_CONTROLLER:
7036                         c->Request.CDBLen = 10;
7037                         c->Request.type_attr_dir =
7038                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
7039                         c->Request.Timeout = 0;
7040                         c->Request.CDB[0] = BMIC_READ;
7041                         c->Request.CDB[1] = 0;
7042                         c->Request.CDB[2] = 0;
7043                         c->Request.CDB[3] = 0;
7044                         c->Request.CDB[4] = 0;
7045                         c->Request.CDB[5] = 0;
7046                         c->Request.CDB[6] = BMIC_IDENTIFY_CONTROLLER;
7047                         c->Request.CDB[7] = (size >> 16) & 0xFF;
7048                         c->Request.CDB[8] = (size >> 8) & 0XFF;
7049                         c->Request.CDB[9] = 0;
7050                         break;
7051                 default:
7052                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
7053                         BUG();
7054                         return -1;
7055                 }
7056         } else if (cmd_type == TYPE_MSG) {
7057                 switch (cmd) {
7058
7059                 case  HPSA_PHYS_TARGET_RESET:
7060                         c->Request.CDBLen = 16;
7061                         c->Request.type_attr_dir =
7062                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
7063                         c->Request.Timeout = 0; /* Don't time out */
7064                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7065                         c->Request.CDB[0] = HPSA_RESET;
7066                         c->Request.CDB[1] = HPSA_TARGET_RESET_TYPE;
7067                         /* Physical target reset needs no control bytes 4-7*/
7068                         c->Request.CDB[4] = 0x00;
7069                         c->Request.CDB[5] = 0x00;
7070                         c->Request.CDB[6] = 0x00;
7071                         c->Request.CDB[7] = 0x00;
7072                         break;
7073                 case  HPSA_DEVICE_RESET_MSG:
7074                         c->Request.CDBLen = 16;
7075                         c->Request.type_attr_dir =
7076                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
7077                         c->Request.Timeout = 0; /* Don't time out */
7078                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7079                         c->Request.CDB[0] =  cmd;
7080                         c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
7081                         /* If bytes 4-7 are zero, it means reset the */
7082                         /* LunID device */
7083                         c->Request.CDB[4] = 0x00;
7084                         c->Request.CDB[5] = 0x00;
7085                         c->Request.CDB[6] = 0x00;
7086                         c->Request.CDB[7] = 0x00;
7087                         break;
7088                 case  HPSA_ABORT_MSG:
7089                         memcpy(&tag, buff, sizeof(tag));
7090                         dev_dbg(&h->pdev->dev,
7091                                 "Abort Tag:0x%016llx using rqst Tag:0x%016llx",
7092                                 tag, c->Header.tag);
7093                         c->Request.CDBLen = 16;
7094                         c->Request.type_attr_dir =
7095                                         TYPE_ATTR_DIR(cmd_type,
7096                                                 ATTR_SIMPLE, XFER_WRITE);
7097                         c->Request.Timeout = 0; /* Don't time out */
7098                         c->Request.CDB[0] = HPSA_TASK_MANAGEMENT;
7099                         c->Request.CDB[1] = HPSA_TMF_ABORT_TASK;
7100                         c->Request.CDB[2] = 0x00; /* reserved */
7101                         c->Request.CDB[3] = 0x00; /* reserved */
7102                         /* Tag to abort goes in CDB[4]-CDB[11] */
7103                         memcpy(&c->Request.CDB[4], &tag, sizeof(tag));
7104                         c->Request.CDB[12] = 0x00; /* reserved */
7105                         c->Request.CDB[13] = 0x00; /* reserved */
7106                         c->Request.CDB[14] = 0x00; /* reserved */
7107                         c->Request.CDB[15] = 0x00; /* reserved */
7108                 break;
7109                 default:
7110                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
7111                                 cmd);
7112                         BUG();
7113                 }
7114         } else {
7115                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
7116                 BUG();
7117         }
7118
7119         switch (GET_DIR(c->Request.type_attr_dir)) {
7120         case XFER_READ:
7121                 pci_dir = PCI_DMA_FROMDEVICE;
7122                 break;
7123         case XFER_WRITE:
7124                 pci_dir = PCI_DMA_TODEVICE;
7125                 break;
7126         case XFER_NONE:
7127                 pci_dir = PCI_DMA_NONE;
7128                 break;
7129         default:
7130                 pci_dir = PCI_DMA_BIDIRECTIONAL;
7131         }
7132         if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
7133                 return -1;
7134         return 0;
7135 }
7136
7137 /*
7138  * Map (physical) PCI mem into (virtual) kernel space
7139  */
7140 static void __iomem *remap_pci_mem(ulong base, ulong size)
7141 {
7142         ulong page_base = ((ulong) base) & PAGE_MASK;
7143         ulong page_offs = ((ulong) base) - page_base;
7144         void __iomem *page_remapped = ioremap_nocache(page_base,
7145                 page_offs + size);
7146
7147         return page_remapped ? (page_remapped + page_offs) : NULL;
7148 }
7149
7150 static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
7151 {
7152         return h->access.command_completed(h, q);
7153 }
7154
7155 static inline bool interrupt_pending(struct ctlr_info *h)
7156 {
7157         return h->access.intr_pending(h);
7158 }
7159
7160 static inline long interrupt_not_for_us(struct ctlr_info *h)
7161 {
7162         return (h->access.intr_pending(h) == 0) ||
7163                 (h->interrupts_enabled == 0);
7164 }
7165
7166 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
7167         u32 raw_tag)
7168 {
7169         if (unlikely(tag_index >= h->nr_cmds)) {
7170                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
7171                 return 1;
7172         }
7173         return 0;
7174 }
7175
7176 static inline void finish_cmd(struct CommandList *c)
7177 {
7178         dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
7179         if (likely(c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_SCSI
7180                         || c->cmd_type == CMD_IOACCEL2))
7181                 complete_scsi_command(c);
7182         else if (c->cmd_type == CMD_IOCTL_PEND || c->cmd_type == IOACCEL2_TMF)
7183                 complete(c->waiting);
7184 }
7185
7186 /* process completion of an indexed ("direct lookup") command */
7187 static inline void process_indexed_cmd(struct ctlr_info *h,
7188         u32 raw_tag)
7189 {
7190         u32 tag_index;
7191         struct CommandList *c;
7192
7193         tag_index = raw_tag >> DIRECT_LOOKUP_SHIFT;
7194         if (!bad_tag(h, tag_index, raw_tag)) {
7195                 c = h->cmd_pool + tag_index;
7196                 finish_cmd(c);
7197         }
7198 }
7199
7200 /* Some controllers, like p400, will give us one interrupt
7201  * after a soft reset, even if we turned interrupts off.
7202  * Only need to check for this in the hpsa_xxx_discard_completions
7203  * functions.
7204  */
7205 static int ignore_bogus_interrupt(struct ctlr_info *h)
7206 {
7207         if (likely(!reset_devices))
7208                 return 0;
7209
7210         if (likely(h->interrupts_enabled))
7211                 return 0;
7212
7213         dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
7214                 "(known firmware bug.)  Ignoring.\n");
7215
7216         return 1;
7217 }
7218
7219 /*
7220  * Convert &h->q[x] (passed to interrupt handlers) back to h.
7221  * Relies on (h-q[x] == x) being true for x such that
7222  * 0 <= x < MAX_REPLY_QUEUES.
7223  */
7224 static struct ctlr_info *queue_to_hba(u8 *queue)
7225 {
7226         return container_of((queue - *queue), struct ctlr_info, q[0]);
7227 }
7228
7229 static irqreturn_t hpsa_intx_discard_completions(int irq, void *queue)
7230 {
7231         struct ctlr_info *h = queue_to_hba(queue);
7232         u8 q = *(u8 *) queue;
7233         u32 raw_tag;
7234
7235         if (ignore_bogus_interrupt(h))
7236                 return IRQ_NONE;
7237
7238         if (interrupt_not_for_us(h))
7239                 return IRQ_NONE;
7240         h->last_intr_timestamp = get_jiffies_64();
7241         while (interrupt_pending(h)) {
7242                 raw_tag = get_next_completion(h, q);
7243                 while (raw_tag != FIFO_EMPTY)
7244                         raw_tag = next_command(h, q);
7245         }
7246         return IRQ_HANDLED;
7247 }
7248
7249 static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
7250 {
7251         struct ctlr_info *h = queue_to_hba(queue);
7252         u32 raw_tag;
7253         u8 q = *(u8 *) queue;
7254
7255         if (ignore_bogus_interrupt(h))
7256                 return IRQ_NONE;
7257
7258         h->last_intr_timestamp = get_jiffies_64();
7259         raw_tag = get_next_completion(h, q);
7260         while (raw_tag != FIFO_EMPTY)
7261                 raw_tag = next_command(h, q);
7262         return IRQ_HANDLED;
7263 }
7264
7265 static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
7266 {
7267         struct ctlr_info *h = queue_to_hba((u8 *) queue);
7268         u32 raw_tag;
7269         u8 q = *(u8 *) queue;
7270
7271         if (interrupt_not_for_us(h))
7272                 return IRQ_NONE;
7273         h->last_intr_timestamp = get_jiffies_64();
7274         while (interrupt_pending(h)) {
7275                 raw_tag = get_next_completion(h, q);
7276                 while (raw_tag != FIFO_EMPTY) {
7277                         process_indexed_cmd(h, raw_tag);
7278                         raw_tag = next_command(h, q);
7279                 }
7280         }
7281         return IRQ_HANDLED;
7282 }
7283
7284 static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
7285 {
7286         struct ctlr_info *h = queue_to_hba(queue);
7287         u32 raw_tag;
7288         u8 q = *(u8 *) queue;
7289
7290         h->last_intr_timestamp = get_jiffies_64();
7291         raw_tag = get_next_completion(h, q);
7292         while (raw_tag != FIFO_EMPTY) {
7293                 process_indexed_cmd(h, raw_tag);
7294                 raw_tag = next_command(h, q);
7295         }
7296         return IRQ_HANDLED;
7297 }
7298
7299 /* Send a message CDB to the firmware. Careful, this only works
7300  * in simple mode, not performant mode due to the tag lookup.
7301  * We only ever use this immediately after a controller reset.
7302  */
7303 static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
7304                         unsigned char type)
7305 {
7306         struct Command {
7307                 struct CommandListHeader CommandHeader;
7308                 struct RequestBlock Request;
7309                 struct ErrDescriptor ErrorDescriptor;
7310         };
7311         struct Command *cmd;
7312         static const size_t cmd_sz = sizeof(*cmd) +
7313                                         sizeof(cmd->ErrorDescriptor);
7314         dma_addr_t paddr64;
7315         __le32 paddr32;
7316         u32 tag;
7317         void __iomem *vaddr;
7318         int i, err;
7319
7320         vaddr = pci_ioremap_bar(pdev, 0);
7321         if (vaddr == NULL)
7322                 return -ENOMEM;
7323
7324         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
7325          * CCISS commands, so they must be allocated from the lower 4GiB of
7326          * memory.
7327          */
7328         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
7329         if (err) {
7330                 iounmap(vaddr);
7331                 return err;
7332         }
7333
7334         cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
7335         if (cmd == NULL) {
7336                 iounmap(vaddr);
7337                 return -ENOMEM;
7338         }
7339
7340         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
7341          * although there's no guarantee, we assume that the address is at
7342          * least 4-byte aligned (most likely, it's page-aligned).
7343          */
7344         paddr32 = cpu_to_le32(paddr64);
7345
7346         cmd->CommandHeader.ReplyQueue = 0;
7347         cmd->CommandHeader.SGList = 0;
7348         cmd->CommandHeader.SGTotal = cpu_to_le16(0);
7349         cmd->CommandHeader.tag = cpu_to_le64(paddr64);
7350         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
7351
7352         cmd->Request.CDBLen = 16;
7353         cmd->Request.type_attr_dir =
7354                         TYPE_ATTR_DIR(TYPE_MSG, ATTR_HEADOFQUEUE, XFER_NONE);
7355         cmd->Request.Timeout = 0; /* Don't time out */
7356         cmd->Request.CDB[0] = opcode;
7357         cmd->Request.CDB[1] = type;
7358         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
7359         cmd->ErrorDescriptor.Addr =
7360                         cpu_to_le64((le32_to_cpu(paddr32) + sizeof(*cmd)));
7361         cmd->ErrorDescriptor.Len = cpu_to_le32(sizeof(struct ErrorInfo));
7362
7363         writel(le32_to_cpu(paddr32), vaddr + SA5_REQUEST_PORT_OFFSET);
7364
7365         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
7366                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
7367                 if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr64)
7368                         break;
7369                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
7370         }
7371
7372         iounmap(vaddr);
7373
7374         /* we leak the DMA buffer here ... no choice since the controller could
7375          *  still complete the command.
7376          */
7377         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
7378                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
7379                         opcode, type);
7380                 return -ETIMEDOUT;
7381         }
7382
7383         pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
7384
7385         if (tag & HPSA_ERROR_BIT) {
7386                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
7387                         opcode, type);
7388                 return -EIO;
7389         }
7390
7391         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
7392                 opcode, type);
7393         return 0;
7394 }
7395
7396 #define hpsa_noop(p) hpsa_message(p, 3, 0)
7397
7398 static int hpsa_controller_hard_reset(struct pci_dev *pdev,
7399         void __iomem *vaddr, u32 use_doorbell)
7400 {
7401
7402         if (use_doorbell) {
7403                 /* For everything after the P600, the PCI power state method
7404                  * of resetting the controller doesn't work, so we have this
7405                  * other way using the doorbell register.
7406                  */
7407                 dev_info(&pdev->dev, "using doorbell to reset controller\n");
7408                 writel(use_doorbell, vaddr + SA5_DOORBELL);
7409
7410                 /* PMC hardware guys tell us we need a 10 second delay after
7411                  * doorbell reset and before any attempt to talk to the board
7412                  * at all to ensure that this actually works and doesn't fall
7413                  * over in some weird corner cases.
7414                  */
7415                 msleep(10000);
7416         } else { /* Try to do it the PCI power state way */
7417
7418                 /* Quoting from the Open CISS Specification: "The Power
7419                  * Management Control/Status Register (CSR) controls the power
7420                  * state of the device.  The normal operating state is D0,
7421                  * CSR=00h.  The software off state is D3, CSR=03h.  To reset
7422                  * the controller, place the interface device in D3 then to D0,
7423                  * this causes a secondary PCI reset which will reset the
7424                  * controller." */
7425
7426                 int rc = 0;
7427
7428                 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
7429
7430                 /* enter the D3hot power management state */
7431                 rc = pci_set_power_state(pdev, PCI_D3hot);
7432                 if (rc)
7433                         return rc;
7434
7435                 msleep(500);
7436
7437                 /* enter the D0 power management state */
7438                 rc = pci_set_power_state(pdev, PCI_D0);
7439                 if (rc)
7440                         return rc;
7441
7442                 /*
7443                  * The P600 requires a small delay when changing states.
7444                  * Otherwise we may think the board did not reset and we bail.
7445                  * This for kdump only and is particular to the P600.
7446                  */
7447                 msleep(500);
7448         }
7449         return 0;
7450 }
7451
7452 static void init_driver_version(char *driver_version, int len)
7453 {
7454         memset(driver_version, 0, len);
7455         strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
7456 }
7457
7458 static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
7459 {
7460         char *driver_version;
7461         int i, size = sizeof(cfgtable->driver_version);
7462
7463         driver_version = kmalloc(size, GFP_KERNEL);
7464         if (!driver_version)
7465                 return -ENOMEM;
7466
7467         init_driver_version(driver_version, size);
7468         for (i = 0; i < size; i++)
7469                 writeb(driver_version[i], &cfgtable->driver_version[i]);
7470         kfree(driver_version);
7471         return 0;
7472 }
7473
7474 static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
7475                                           unsigned char *driver_ver)
7476 {
7477         int i;
7478
7479         for (i = 0; i < sizeof(cfgtable->driver_version); i++)
7480                 driver_ver[i] = readb(&cfgtable->driver_version[i]);
7481 }
7482
7483 static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
7484 {
7485
7486         char *driver_ver, *old_driver_ver;
7487         int rc, size = sizeof(cfgtable->driver_version);
7488
7489         old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
7490         if (!old_driver_ver)
7491                 return -ENOMEM;
7492         driver_ver = old_driver_ver + size;
7493
7494         /* After a reset, the 32 bytes of "driver version" in the cfgtable
7495          * should have been changed, otherwise we know the reset failed.
7496          */
7497         init_driver_version(old_driver_ver, size);
7498         read_driver_ver_from_cfgtable(cfgtable, driver_ver);
7499         rc = !memcmp(driver_ver, old_driver_ver, size);
7500         kfree(old_driver_ver);
7501         return rc;
7502 }
7503 /* This does a hard reset of the controller using PCI power management
7504  * states or the using the doorbell register.
7505  */
7506 static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev, u32 board_id)
7507 {
7508         u64 cfg_offset;
7509         u32 cfg_base_addr;
7510         u64 cfg_base_addr_index;
7511         void __iomem *vaddr;
7512         unsigned long paddr;
7513         u32 misc_fw_support;
7514         int rc;
7515         struct CfgTable __iomem *cfgtable;
7516         u32 use_doorbell;
7517         u16 command_register;
7518
7519         /* For controllers as old as the P600, this is very nearly
7520          * the same thing as
7521          *
7522          * pci_save_state(pci_dev);
7523          * pci_set_power_state(pci_dev, PCI_D3hot);
7524          * pci_set_power_state(pci_dev, PCI_D0);
7525          * pci_restore_state(pci_dev);
7526          *
7527          * For controllers newer than the P600, the pci power state
7528          * method of resetting doesn't work so we have another way
7529          * using the doorbell register.
7530          */
7531
7532         if (!ctlr_is_resettable(board_id)) {
7533                 dev_warn(&pdev->dev, "Controller not resettable\n");
7534                 return -ENODEV;
7535         }
7536
7537         /* if controller is soft- but not hard resettable... */
7538         if (!ctlr_is_hard_resettable(board_id))
7539                 return -ENOTSUPP; /* try soft reset later. */
7540
7541         /* Save the PCI command register */
7542         pci_read_config_word(pdev, 4, &command_register);
7543         pci_save_state(pdev);
7544
7545         /* find the first memory BAR, so we can find the cfg table */
7546         rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
7547         if (rc)
7548                 return rc;
7549         vaddr = remap_pci_mem(paddr, 0x250);
7550         if (!vaddr)
7551                 return -ENOMEM;
7552
7553         /* find cfgtable in order to check if reset via doorbell is supported */
7554         rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
7555                                         &cfg_base_addr_index, &cfg_offset);
7556         if (rc)
7557                 goto unmap_vaddr;
7558         cfgtable = remap_pci_mem(pci_resource_start(pdev,
7559                        cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
7560         if (!cfgtable) {
7561                 rc = -ENOMEM;
7562                 goto unmap_vaddr;
7563         }
7564         rc = write_driver_ver_to_cfgtable(cfgtable);
7565         if (rc)
7566                 goto unmap_cfgtable;
7567
7568         /* If reset via doorbell register is supported, use that.
7569          * There are two such methods.  Favor the newest method.
7570          */
7571         misc_fw_support = readl(&cfgtable->misc_fw_support);
7572         use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
7573         if (use_doorbell) {
7574                 use_doorbell = DOORBELL_CTLR_RESET2;
7575         } else {
7576                 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
7577                 if (use_doorbell) {
7578                         dev_warn(&pdev->dev,
7579                                 "Soft reset not supported. Firmware update is required.\n");
7580                         rc = -ENOTSUPP; /* try soft reset */
7581                         goto unmap_cfgtable;
7582                 }
7583         }
7584
7585         rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
7586         if (rc)
7587                 goto unmap_cfgtable;
7588
7589         pci_restore_state(pdev);
7590         pci_write_config_word(pdev, 4, command_register);
7591
7592         /* Some devices (notably the HP Smart Array 5i Controller)
7593            need a little pause here */
7594         msleep(HPSA_POST_RESET_PAUSE_MSECS);
7595
7596         rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
7597         if (rc) {
7598                 dev_warn(&pdev->dev,
7599                         "Failed waiting for board to become ready after hard reset\n");
7600                 goto unmap_cfgtable;
7601         }
7602
7603         rc = controller_reset_failed(vaddr);
7604         if (rc < 0)
7605                 goto unmap_cfgtable;
7606         if (rc) {
7607                 dev_warn(&pdev->dev, "Unable to successfully reset "
7608                         "controller. Will try soft reset.\n");
7609                 rc = -ENOTSUPP;
7610         } else {
7611                 dev_info(&pdev->dev, "board ready after hard reset.\n");
7612         }
7613
7614 unmap_cfgtable:
7615         iounmap(cfgtable);
7616
7617 unmap_vaddr:
7618         iounmap(vaddr);
7619         return rc;
7620 }
7621
7622 /*
7623  *  We cannot read the structure directly, for portability we must use
7624  *   the io functions.
7625  *   This is for debug only.
7626  */
7627 static void print_cfg_table(struct device *dev, struct CfgTable __iomem *tb)
7628 {
7629 #ifdef HPSA_DEBUG
7630         int i;
7631         char temp_name[17];
7632
7633         dev_info(dev, "Controller Configuration information\n");
7634         dev_info(dev, "------------------------------------\n");
7635         for (i = 0; i < 4; i++)
7636                 temp_name[i] = readb(&(tb->Signature[i]));
7637         temp_name[4] = '\0';
7638         dev_info(dev, "   Signature = %s\n", temp_name);
7639         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
7640         dev_info(dev, "   Transport methods supported = 0x%x\n",
7641                readl(&(tb->TransportSupport)));
7642         dev_info(dev, "   Transport methods active = 0x%x\n",
7643                readl(&(tb->TransportActive)));
7644         dev_info(dev, "   Requested transport Method = 0x%x\n",
7645                readl(&(tb->HostWrite.TransportRequest)));
7646         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
7647                readl(&(tb->HostWrite.CoalIntDelay)));
7648         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
7649                readl(&(tb->HostWrite.CoalIntCount)));
7650         dev_info(dev, "   Max outstanding commands = %d\n",
7651                readl(&(tb->CmdsOutMax)));
7652         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
7653         for (i = 0; i < 16; i++)
7654                 temp_name[i] = readb(&(tb->ServerName[i]));
7655         temp_name[16] = '\0';
7656         dev_info(dev, "   Server Name = %s\n", temp_name);
7657         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
7658                 readl(&(tb->HeartBeat)));
7659 #endif                          /* HPSA_DEBUG */
7660 }
7661
7662 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
7663 {
7664         int i, offset, mem_type, bar_type;
7665
7666         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
7667                 return 0;
7668         offset = 0;
7669         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
7670                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
7671                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
7672                         offset += 4;
7673                 else {
7674                         mem_type = pci_resource_flags(pdev, i) &
7675                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
7676                         switch (mem_type) {
7677                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
7678                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
7679                                 offset += 4;    /* 32 bit */
7680                                 break;
7681                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
7682                                 offset += 8;
7683                                 break;
7684                         default:        /* reserved in PCI 2.2 */
7685                                 dev_warn(&pdev->dev,
7686                                        "base address is invalid\n");
7687                                 return -1;
7688                                 break;
7689                         }
7690                 }
7691                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
7692                         return i + 1;
7693         }
7694         return -1;
7695 }
7696
7697 static void hpsa_disable_interrupt_mode(struct ctlr_info *h)
7698 {
7699         pci_free_irq_vectors(h->pdev);
7700         h->msix_vectors = 0;
7701 }
7702
7703 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
7704  * controllers that are capable. If not, we use legacy INTx mode.
7705  */
7706 static int hpsa_interrupt_mode(struct ctlr_info *h)
7707 {
7708         unsigned int flags = PCI_IRQ_LEGACY;
7709         int ret;
7710
7711         /* Some boards advertise MSI but don't really support it */
7712         switch (h->board_id) {
7713         case 0x40700E11:
7714         case 0x40800E11:
7715         case 0x40820E11:
7716         case 0x40830E11:
7717                 break;
7718         default:
7719                 ret = pci_alloc_irq_vectors(h->pdev, 1, MAX_REPLY_QUEUES,
7720                                 PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
7721                 if (ret > 0) {
7722                         h->msix_vectors = ret;
7723                         return 0;
7724                 }
7725
7726                 flags |= PCI_IRQ_MSI;
7727                 break;
7728         }
7729
7730         ret = pci_alloc_irq_vectors(h->pdev, 1, 1, flags);
7731         if (ret < 0)
7732                 return ret;
7733         return 0;
7734 }
7735
7736 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
7737 {
7738         int i;
7739         u32 subsystem_vendor_id, subsystem_device_id;
7740
7741         subsystem_vendor_id = pdev->subsystem_vendor;
7742         subsystem_device_id = pdev->subsystem_device;
7743         *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
7744                     subsystem_vendor_id;
7745
7746         for (i = 0; i < ARRAY_SIZE(products); i++)
7747                 if (*board_id == products[i].board_id)
7748                         return i;
7749
7750         if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
7751                 subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
7752                 !hpsa_allow_any) {
7753                 dev_warn(&pdev->dev, "unrecognized board ID: "
7754                         "0x%08x, ignoring.\n", *board_id);
7755                         return -ENODEV;
7756         }
7757         return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
7758 }
7759
7760 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
7761                                     unsigned long *memory_bar)
7762 {
7763         int i;
7764
7765         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
7766                 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
7767                         /* addressing mode bits already removed */
7768                         *memory_bar = pci_resource_start(pdev, i);
7769                         dev_dbg(&pdev->dev, "memory BAR = %lx\n",
7770                                 *memory_bar);
7771                         return 0;
7772                 }
7773         dev_warn(&pdev->dev, "no memory BAR found\n");
7774         return -ENODEV;
7775 }
7776
7777 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
7778                                      int wait_for_ready)
7779 {
7780         int i, iterations;
7781         u32 scratchpad;
7782         if (wait_for_ready)
7783                 iterations = HPSA_BOARD_READY_ITERATIONS;
7784         else
7785                 iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
7786
7787         for (i = 0; i < iterations; i++) {
7788                 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
7789                 if (wait_for_ready) {
7790                         if (scratchpad == HPSA_FIRMWARE_READY)
7791                                 return 0;
7792                 } else {
7793                         if (scratchpad != HPSA_FIRMWARE_READY)
7794                                 return 0;
7795                 }
7796                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
7797         }
7798         dev_warn(&pdev->dev, "board not ready, timed out.\n");
7799         return -ENODEV;
7800 }
7801
7802 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
7803                                u32 *cfg_base_addr, u64 *cfg_base_addr_index,
7804                                u64 *cfg_offset)
7805 {
7806         *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
7807         *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
7808         *cfg_base_addr &= (u32) 0x0000ffff;
7809         *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
7810         if (*cfg_base_addr_index == -1) {
7811                 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
7812                 return -ENODEV;
7813         }
7814         return 0;
7815 }
7816
7817 static void hpsa_free_cfgtables(struct ctlr_info *h)
7818 {
7819         if (h->transtable) {
7820                 iounmap(h->transtable);
7821                 h->transtable = NULL;
7822         }
7823         if (h->cfgtable) {
7824                 iounmap(h->cfgtable);
7825                 h->cfgtable = NULL;
7826         }
7827 }
7828
7829 /* Find and map CISS config table and transfer table
7830 + * several items must be unmapped (freed) later
7831 + * */
7832 static int hpsa_find_cfgtables(struct ctlr_info *h)
7833 {
7834         u64 cfg_offset;
7835         u32 cfg_base_addr;
7836         u64 cfg_base_addr_index;
7837         u32 trans_offset;
7838         int rc;
7839
7840         rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
7841                 &cfg_base_addr_index, &cfg_offset);
7842         if (rc)
7843                 return rc;
7844         h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
7845                        cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
7846         if (!h->cfgtable) {
7847                 dev_err(&h->pdev->dev, "Failed mapping cfgtable\n");
7848                 return -ENOMEM;
7849         }
7850         rc = write_driver_ver_to_cfgtable(h->cfgtable);
7851         if (rc)
7852                 return rc;
7853         /* Find performant mode table. */
7854         trans_offset = readl(&h->cfgtable->TransMethodOffset);
7855         h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
7856                                 cfg_base_addr_index)+cfg_offset+trans_offset,
7857                                 sizeof(*h->transtable));
7858         if (!h->transtable) {
7859                 dev_err(&h->pdev->dev, "Failed mapping transfer table\n");
7860                 hpsa_free_cfgtables(h);
7861                 return -ENOMEM;
7862         }
7863         return 0;
7864 }
7865
7866 static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
7867 {
7868 #define MIN_MAX_COMMANDS 16
7869         BUILD_BUG_ON(MIN_MAX_COMMANDS <= HPSA_NRESERVED_CMDS);
7870
7871         h->max_commands = readl(&h->cfgtable->MaxPerformantModeCommands);
7872
7873         /* Limit commands in memory limited kdump scenario. */
7874         if (reset_devices && h->max_commands > 32)
7875                 h->max_commands = 32;
7876
7877         if (h->max_commands < MIN_MAX_COMMANDS) {
7878                 dev_warn(&h->pdev->dev,
7879                         "Controller reports max supported commands of %d Using %d instead. Ensure that firmware is up to date.\n",
7880                         h->max_commands,
7881                         MIN_MAX_COMMANDS);
7882                 h->max_commands = MIN_MAX_COMMANDS;
7883         }
7884 }
7885
7886 /* If the controller reports that the total max sg entries is greater than 512,
7887  * then we know that chained SG blocks work.  (Original smart arrays did not
7888  * support chained SG blocks and would return zero for max sg entries.)
7889  */
7890 static int hpsa_supports_chained_sg_blocks(struct ctlr_info *h)
7891 {
7892         return h->maxsgentries > 512;
7893 }
7894
7895 /* Interrogate the hardware for some limits:
7896  * max commands, max SG elements without chaining, and with chaining,
7897  * SG chain block size, etc.
7898  */
7899 static void hpsa_find_board_params(struct ctlr_info *h)
7900 {
7901         hpsa_get_max_perf_mode_cmds(h);
7902         h->nr_cmds = h->max_commands;
7903         h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
7904         h->fw_support = readl(&(h->cfgtable->misc_fw_support));
7905         if (hpsa_supports_chained_sg_blocks(h)) {
7906                 /* Limit in-command s/g elements to 32 save dma'able memory. */
7907                 h->max_cmd_sg_entries = 32;
7908                 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries;
7909                 h->maxsgentries--; /* save one for chain pointer */
7910         } else {
7911                 /*
7912                  * Original smart arrays supported at most 31 s/g entries
7913                  * embedded inline in the command (trying to use more
7914                  * would lock up the controller)
7915                  */
7916                 h->max_cmd_sg_entries = 31;
7917                 h->maxsgentries = 31; /* default to traditional values */
7918                 h->chainsize = 0;
7919         }
7920
7921         /* Find out what task management functions are supported and cache */
7922         h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
7923         if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags))
7924                 dev_warn(&h->pdev->dev, "Physical aborts not supported\n");
7925         if (!(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
7926                 dev_warn(&h->pdev->dev, "Logical aborts not supported\n");
7927         if (!(HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags))
7928                 dev_warn(&h->pdev->dev, "HP SSD Smart Path aborts not supported\n");
7929 }
7930
7931 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
7932 {
7933         if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
7934                 dev_err(&h->pdev->dev, "not a valid CISS config table\n");
7935                 return false;
7936         }
7937         return true;
7938 }
7939
7940 static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
7941 {
7942         u32 driver_support;
7943
7944         driver_support = readl(&(h->cfgtable->driver_support));
7945         /* Need to enable prefetch in the SCSI core for 6400 in x86 */
7946 #ifdef CONFIG_X86
7947         driver_support |= ENABLE_SCSI_PREFETCH;
7948 #endif
7949         driver_support |= ENABLE_UNIT_ATTN;
7950         writel(driver_support, &(h->cfgtable->driver_support));
7951 }
7952
7953 /* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
7954  * in a prefetch beyond physical memory.
7955  */
7956 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
7957 {
7958         u32 dma_prefetch;
7959
7960         if (h->board_id != 0x3225103C)
7961                 return;
7962         dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
7963         dma_prefetch |= 0x8000;
7964         writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
7965 }
7966
7967 static int hpsa_wait_for_clear_event_notify_ack(struct ctlr_info *h)
7968 {
7969         int i;
7970         u32 doorbell_value;
7971         unsigned long flags;
7972         /* wait until the clear_event_notify bit 6 is cleared by controller. */
7973         for (i = 0; i < MAX_CLEAR_EVENT_WAIT; i++) {
7974                 spin_lock_irqsave(&h->lock, flags);
7975                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
7976                 spin_unlock_irqrestore(&h->lock, flags);
7977                 if (!(doorbell_value & DOORBELL_CLEAR_EVENTS))
7978                         goto done;
7979                 /* delay and try again */
7980                 msleep(CLEAR_EVENT_WAIT_INTERVAL);
7981         }
7982         return -ENODEV;
7983 done:
7984         return 0;
7985 }
7986
7987 static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
7988 {
7989         int i;
7990         u32 doorbell_value;
7991         unsigned long flags;
7992
7993         /* under certain very rare conditions, this can take awhile.
7994          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
7995          * as we enter this code.)
7996          */
7997         for (i = 0; i < MAX_MODE_CHANGE_WAIT; i++) {
7998                 if (h->remove_in_progress)
7999                         goto done;
8000                 spin_lock_irqsave(&h->lock, flags);
8001                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
8002                 spin_unlock_irqrestore(&h->lock, flags);
8003                 if (!(doorbell_value & CFGTBL_ChangeReq))
8004                         goto done;
8005                 /* delay and try again */
8006                 msleep(MODE_CHANGE_WAIT_INTERVAL);
8007         }
8008         return -ENODEV;
8009 done:
8010         return 0;
8011 }
8012
8013 /* return -ENODEV or other reason on error, 0 on success */
8014 static int hpsa_enter_simple_mode(struct ctlr_info *h)
8015 {
8016         u32 trans_support;
8017
8018         trans_support = readl(&(h->cfgtable->TransportSupport));
8019         if (!(trans_support & SIMPLE_MODE))
8020                 return -ENOTSUPP;
8021
8022         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
8023
8024         /* Update the field, and then ring the doorbell */
8025         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
8026         writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
8027         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
8028         if (hpsa_wait_for_mode_change_ack(h))
8029                 goto error;
8030         print_cfg_table(&h->pdev->dev, h->cfgtable);
8031         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
8032                 goto error;
8033         h->transMethod = CFGTBL_Trans_Simple;
8034         return 0;
8035 error:
8036         dev_err(&h->pdev->dev, "failed to enter simple mode\n");
8037         return -ENODEV;
8038 }
8039
8040 /* free items allocated or mapped by hpsa_pci_init */
8041 static void hpsa_free_pci_init(struct ctlr_info *h)
8042 {
8043         hpsa_free_cfgtables(h);                 /* pci_init 4 */
8044         iounmap(h->vaddr);                      /* pci_init 3 */
8045         h->vaddr = NULL;
8046         hpsa_disable_interrupt_mode(h);         /* pci_init 2 */
8047         /*
8048          * call pci_disable_device before pci_release_regions per
8049          * Documentation/PCI/pci.txt
8050          */
8051         pci_disable_device(h->pdev);            /* pci_init 1 */
8052         pci_release_regions(h->pdev);           /* pci_init 2 */
8053 }
8054
8055 /* several items must be freed later */
8056 static int hpsa_pci_init(struct ctlr_info *h)
8057 {
8058         int prod_index, err;
8059
8060         prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
8061         if (prod_index < 0)
8062                 return prod_index;
8063         h->product_name = products[prod_index].product_name;
8064         h->access = *(products[prod_index].access);
8065
8066         h->needs_abort_tags_swizzled =
8067                 ctlr_needs_abort_tags_swizzled(h->board_id);
8068
8069         pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
8070                                PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
8071
8072         err = pci_enable_device(h->pdev);
8073         if (err) {
8074                 dev_err(&h->pdev->dev, "failed to enable PCI device\n");
8075                 pci_disable_device(h->pdev);
8076                 return err;
8077         }
8078
8079         err = pci_request_regions(h->pdev, HPSA);
8080         if (err) {
8081                 dev_err(&h->pdev->dev,
8082                         "failed to obtain PCI resources\n");
8083                 pci_disable_device(h->pdev);
8084                 return err;
8085         }
8086
8087         pci_set_master(h->pdev);
8088
8089         err = hpsa_interrupt_mode(h);
8090         if (err)
8091                 goto clean1;
8092         err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
8093         if (err)
8094                 goto clean2;    /* intmode+region, pci */
8095         h->vaddr = remap_pci_mem(h->paddr, 0x250);
8096         if (!h->vaddr) {
8097                 dev_err(&h->pdev->dev, "failed to remap PCI mem\n");
8098                 err = -ENOMEM;
8099                 goto clean2;    /* intmode+region, pci */
8100         }
8101         err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
8102         if (err)
8103                 goto clean3;    /* vaddr, intmode+region, pci */
8104         err = hpsa_find_cfgtables(h);
8105         if (err)
8106                 goto clean3;    /* vaddr, intmode+region, pci */
8107         hpsa_find_board_params(h);
8108
8109         if (!hpsa_CISS_signature_present(h)) {
8110                 err = -ENODEV;
8111                 goto clean4;    /* cfgtables, vaddr, intmode+region, pci */
8112         }
8113         hpsa_set_driver_support_bits(h);
8114         hpsa_p600_dma_prefetch_quirk(h);
8115         err = hpsa_enter_simple_mode(h);
8116         if (err)
8117                 goto clean4;    /* cfgtables, vaddr, intmode+region, pci */
8118         return 0;
8119
8120 clean4: /* cfgtables, vaddr, intmode+region, pci */
8121         hpsa_free_cfgtables(h);
8122 clean3: /* vaddr, intmode+region, pci */
8123         iounmap(h->vaddr);
8124         h->vaddr = NULL;
8125 clean2: /* intmode+region, pci */
8126         hpsa_disable_interrupt_mode(h);
8127 clean1:
8128         /*
8129          * call pci_disable_device before pci_release_regions per
8130          * Documentation/PCI/pci.txt
8131          */
8132         pci_disable_device(h->pdev);
8133         pci_release_regions(h->pdev);
8134         return err;
8135 }
8136
8137 static void hpsa_hba_inquiry(struct ctlr_info *h)
8138 {
8139         int rc;
8140
8141 #define HBA_INQUIRY_BYTE_COUNT 64
8142         h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
8143         if (!h->hba_inquiry_data)
8144                 return;
8145         rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
8146                 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
8147         if (rc != 0) {
8148                 kfree(h->hba_inquiry_data);
8149                 h->hba_inquiry_data = NULL;
8150         }
8151 }
8152
8153 static int hpsa_init_reset_devices(struct pci_dev *pdev, u32 board_id)
8154 {
8155         int rc, i;
8156         void __iomem *vaddr;
8157
8158         if (!reset_devices)
8159                 return 0;
8160
8161         /* kdump kernel is loading, we don't know in which state is
8162          * the pci interface. The dev->enable_cnt is equal zero
8163          * so we call enable+disable, wait a while and switch it on.
8164          */
8165         rc = pci_enable_device(pdev);
8166         if (rc) {
8167                 dev_warn(&pdev->dev, "Failed to enable PCI device\n");
8168                 return -ENODEV;
8169         }
8170         pci_disable_device(pdev);
8171         msleep(260);                    /* a randomly chosen number */
8172         rc = pci_enable_device(pdev);
8173         if (rc) {
8174                 dev_warn(&pdev->dev, "failed to enable device.\n");
8175                 return -ENODEV;
8176         }
8177
8178         pci_set_master(pdev);
8179
8180         vaddr = pci_ioremap_bar(pdev, 0);
8181         if (vaddr == NULL) {
8182                 rc = -ENOMEM;
8183                 goto out_disable;
8184         }
8185         writel(SA5_INTR_OFF, vaddr + SA5_REPLY_INTR_MASK_OFFSET);
8186         iounmap(vaddr);
8187
8188         /* Reset the controller with a PCI power-cycle or via doorbell */
8189         rc = hpsa_kdump_hard_reset_controller(pdev, board_id);
8190
8191         /* -ENOTSUPP here means we cannot reset the controller
8192          * but it's already (and still) up and running in
8193          * "performant mode".  Or, it might be 640x, which can't reset
8194          * due to concerns about shared bbwc between 6402/6404 pair.
8195          */
8196         if (rc)
8197                 goto out_disable;
8198
8199         /* Now try to get the controller to respond to a no-op */
8200         dev_info(&pdev->dev, "Waiting for controller to respond to no-op\n");
8201         for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
8202                 if (hpsa_noop(pdev) == 0)
8203                         break;
8204                 else
8205                         dev_warn(&pdev->dev, "no-op failed%s\n",
8206                                         (i < 11 ? "; re-trying" : ""));
8207         }
8208
8209 out_disable:
8210
8211         pci_disable_device(pdev);
8212         return rc;
8213 }
8214
8215 static void hpsa_free_cmd_pool(struct ctlr_info *h)
8216 {
8217         kfree(h->cmd_pool_bits);
8218         h->cmd_pool_bits = NULL;
8219         if (h->cmd_pool) {
8220                 pci_free_consistent(h->pdev,
8221                                 h->nr_cmds * sizeof(struct CommandList),
8222                                 h->cmd_pool,
8223                                 h->cmd_pool_dhandle);
8224                 h->cmd_pool = NULL;
8225                 h->cmd_pool_dhandle = 0;
8226         }
8227         if (h->errinfo_pool) {
8228                 pci_free_consistent(h->pdev,
8229                                 h->nr_cmds * sizeof(struct ErrorInfo),
8230                                 h->errinfo_pool,
8231                                 h->errinfo_pool_dhandle);
8232                 h->errinfo_pool = NULL;
8233                 h->errinfo_pool_dhandle = 0;
8234         }
8235 }
8236
8237 static int hpsa_alloc_cmd_pool(struct ctlr_info *h)
8238 {
8239         h->cmd_pool_bits = kzalloc(
8240                 DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
8241                 sizeof(unsigned long), GFP_KERNEL);
8242         h->cmd_pool = pci_alloc_consistent(h->pdev,
8243                     h->nr_cmds * sizeof(*h->cmd_pool),
8244                     &(h->cmd_pool_dhandle));
8245         h->errinfo_pool = pci_alloc_consistent(h->pdev,
8246                     h->nr_cmds * sizeof(*h->errinfo_pool),
8247                     &(h->errinfo_pool_dhandle));
8248         if ((h->cmd_pool_bits == NULL)
8249             || (h->cmd_pool == NULL)
8250             || (h->errinfo_pool == NULL)) {
8251                 dev_err(&h->pdev->dev, "out of memory in %s", __func__);
8252                 goto clean_up;
8253         }
8254         hpsa_preinitialize_commands(h);
8255         return 0;
8256 clean_up:
8257         hpsa_free_cmd_pool(h);
8258         return -ENOMEM;
8259 }
8260
8261 /* clear affinity hints and free MSI-X, MSI, or legacy INTx vectors */
8262 static void hpsa_free_irqs(struct ctlr_info *h)
8263 {
8264         int i;
8265
8266         if (!h->msix_vectors || h->intr_mode != PERF_MODE_INT) {
8267                 /* Single reply queue, only one irq to free */
8268                 free_irq(pci_irq_vector(h->pdev, 0), &h->q[h->intr_mode]);
8269                 h->q[h->intr_mode] = 0;
8270                 return;
8271         }
8272
8273         for (i = 0; i < h->msix_vectors; i++) {
8274                 free_irq(pci_irq_vector(h->pdev, i), &h->q[i]);
8275                 h->q[i] = 0;
8276         }
8277         for (; i < MAX_REPLY_QUEUES; i++)
8278                 h->q[i] = 0;
8279 }
8280
8281 /* returns 0 on success; cleans up and returns -Enn on error */
8282 static int hpsa_request_irqs(struct ctlr_info *h,
8283         irqreturn_t (*msixhandler)(int, void *),
8284         irqreturn_t (*intxhandler)(int, void *))
8285 {
8286         int rc, i;
8287
8288         /*
8289          * initialize h->q[x] = x so that interrupt handlers know which
8290          * queue to process.
8291          */
8292         for (i = 0; i < MAX_REPLY_QUEUES; i++)
8293                 h->q[i] = (u8) i;
8294
8295         if (h->intr_mode == PERF_MODE_INT && h->msix_vectors > 0) {
8296                 /* If performant mode and MSI-X, use multiple reply queues */
8297                 for (i = 0; i < h->msix_vectors; i++) {
8298                         sprintf(h->intrname[i], "%s-msix%d", h->devname, i);
8299                         rc = request_irq(pci_irq_vector(h->pdev, i), msixhandler,
8300                                         0, h->intrname[i],
8301                                         &h->q[i]);
8302                         if (rc) {
8303                                 int j;
8304
8305                                 dev_err(&h->pdev->dev,
8306                                         "failed to get irq %d for %s\n",
8307                                        pci_irq_vector(h->pdev, i), h->devname);
8308                                 for (j = 0; j < i; j++) {
8309                                         free_irq(pci_irq_vector(h->pdev, j), &h->q[j]);
8310                                         h->q[j] = 0;
8311                                 }
8312                                 for (; j < MAX_REPLY_QUEUES; j++)
8313                                         h->q[j] = 0;
8314                                 return rc;
8315                         }
8316                 }
8317         } else {
8318                 /* Use single reply pool */
8319                 if (h->msix_vectors > 0 || h->pdev->msi_enabled) {
8320                         sprintf(h->intrname[0], "%s-msi%s", h->devname,
8321                                 h->msix_vectors ? "x" : "");
8322                         rc = request_irq(pci_irq_vector(h->pdev, 0),
8323                                 msixhandler, 0,
8324                                 h->intrname[0],
8325                                 &h->q[h->intr_mode]);
8326                 } else {
8327                         sprintf(h->intrname[h->intr_mode],
8328                                 "%s-intx", h->devname);
8329                         rc = request_irq(pci_irq_vector(h->pdev, 0),
8330                                 intxhandler, IRQF_SHARED,
8331                                 h->intrname[0],
8332                                 &h->q[h->intr_mode]);
8333                 }
8334         }
8335         if (rc) {
8336                 dev_err(&h->pdev->dev, "failed to get irq %d for %s\n",
8337                        pci_irq_vector(h->pdev, 0), h->devname);
8338                 hpsa_free_irqs(h);
8339                 return -ENODEV;
8340         }
8341         return 0;
8342 }
8343
8344 static int hpsa_kdump_soft_reset(struct ctlr_info *h)
8345 {
8346         int rc;
8347         hpsa_send_host_reset(h, RAID_CTLR_LUNID, HPSA_RESET_TYPE_CONTROLLER);
8348
8349         dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
8350         rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY);
8351         if (rc) {
8352                 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
8353                 return rc;
8354         }
8355
8356         dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
8357         rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
8358         if (rc) {
8359                 dev_warn(&h->pdev->dev, "Board failed to become ready "
8360                         "after soft reset.\n");
8361                 return rc;
8362         }
8363
8364         return 0;
8365 }
8366
8367 static void hpsa_free_reply_queues(struct ctlr_info *h)
8368 {
8369         int i;
8370
8371         for (i = 0; i < h->nreply_queues; i++) {
8372                 if (!h->reply_queue[i].head)
8373                         continue;
8374                 pci_free_consistent(h->pdev,
8375                                         h->reply_queue_size,
8376                                         h->reply_queue[i].head,
8377                                         h->reply_queue[i].busaddr);
8378                 h->reply_queue[i].head = NULL;
8379                 h->reply_queue[i].busaddr = 0;
8380         }
8381         h->reply_queue_size = 0;
8382 }
8383
8384 static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
8385 {
8386         hpsa_free_performant_mode(h);           /* init_one 7 */
8387         hpsa_free_sg_chain_blocks(h);           /* init_one 6 */
8388         hpsa_free_cmd_pool(h);                  /* init_one 5 */
8389         hpsa_free_irqs(h);                      /* init_one 4 */
8390         scsi_host_put(h->scsi_host);            /* init_one 3 */
8391         h->scsi_host = NULL;                    /* init_one 3 */
8392         hpsa_free_pci_init(h);                  /* init_one 2_5 */
8393         free_percpu(h->lockup_detected);        /* init_one 2 */
8394         h->lockup_detected = NULL;              /* init_one 2 */
8395         if (h->resubmit_wq) {
8396                 destroy_workqueue(h->resubmit_wq);      /* init_one 1 */
8397                 h->resubmit_wq = NULL;
8398         }
8399         if (h->rescan_ctlr_wq) {
8400                 destroy_workqueue(h->rescan_ctlr_wq);
8401                 h->rescan_ctlr_wq = NULL;
8402         }
8403         kfree(h);                               /* init_one 1 */
8404 }
8405
8406 /* Called when controller lockup detected. */
8407 static void fail_all_outstanding_cmds(struct ctlr_info *h)
8408 {
8409         int i, refcount;
8410         struct CommandList *c;
8411         int failcount = 0;
8412
8413         flush_workqueue(h->resubmit_wq); /* ensure all cmds are fully built */
8414         for (i = 0; i < h->nr_cmds; i++) {
8415                 c = h->cmd_pool + i;
8416                 refcount = atomic_inc_return(&c->refcount);
8417                 if (refcount > 1) {
8418                         c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
8419                         finish_cmd(c);
8420                         atomic_dec(&h->commands_outstanding);
8421                         failcount++;
8422                 }
8423                 cmd_free(h, c);
8424         }
8425         dev_warn(&h->pdev->dev,
8426                 "failed %d commands in fail_all\n", failcount);
8427 }
8428
8429 static void set_lockup_detected_for_all_cpus(struct ctlr_info *h, u32 value)
8430 {
8431         int cpu;
8432
8433         for_each_online_cpu(cpu) {
8434                 u32 *lockup_detected;
8435                 lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
8436                 *lockup_detected = value;
8437         }
8438         wmb(); /* be sure the per-cpu variables are out to memory */
8439 }
8440
8441 static void controller_lockup_detected(struct ctlr_info *h)
8442 {
8443         unsigned long flags;
8444         u32 lockup_detected;
8445
8446         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8447         spin_lock_irqsave(&h->lock, flags);
8448         lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
8449         if (!lockup_detected) {
8450                 /* no heartbeat, but controller gave us a zero. */
8451                 dev_warn(&h->pdev->dev,
8452                         "lockup detected after %d but scratchpad register is zero\n",
8453                         h->heartbeat_sample_interval / HZ);
8454                 lockup_detected = 0xffffffff;
8455         }
8456         set_lockup_detected_for_all_cpus(h, lockup_detected);
8457         spin_unlock_irqrestore(&h->lock, flags);
8458         dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x after %d\n",
8459                         lockup_detected, h->heartbeat_sample_interval / HZ);
8460         pci_disable_device(h->pdev);
8461         fail_all_outstanding_cmds(h);
8462 }
8463
8464 static int detect_controller_lockup(struct ctlr_info *h)
8465 {
8466         u64 now;
8467         u32 heartbeat;
8468         unsigned long flags;
8469
8470         now = get_jiffies_64();
8471         /* If we've received an interrupt recently, we're ok. */
8472         if (time_after64(h->last_intr_timestamp +
8473                                 (h->heartbeat_sample_interval), now))
8474                 return false;
8475
8476         /*
8477          * If we've already checked the heartbeat recently, we're ok.
8478          * This could happen if someone sends us a signal. We
8479          * otherwise don't care about signals in this thread.
8480          */
8481         if (time_after64(h->last_heartbeat_timestamp +
8482                                 (h->heartbeat_sample_interval), now))
8483                 return false;
8484
8485         /* If heartbeat has not changed since we last looked, we're not ok. */
8486         spin_lock_irqsave(&h->lock, flags);
8487         heartbeat = readl(&h->cfgtable->HeartBeat);
8488         spin_unlock_irqrestore(&h->lock, flags);
8489         if (h->last_heartbeat == heartbeat) {
8490                 controller_lockup_detected(h);
8491                 return true;
8492         }
8493
8494         /* We're ok. */
8495         h->last_heartbeat = heartbeat;
8496         h->last_heartbeat_timestamp = now;
8497         return false;
8498 }
8499
8500 static void hpsa_ack_ctlr_events(struct ctlr_info *h)
8501 {
8502         int i;
8503         char *event_type;
8504
8505         if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8506                 return;
8507
8508         /* Ask the controller to clear the events we're handling. */
8509         if ((h->transMethod & (CFGTBL_Trans_io_accel1
8510                         | CFGTBL_Trans_io_accel2)) &&
8511                 (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE ||
8512                  h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)) {
8513
8514                 if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE)
8515                         event_type = "state change";
8516                 if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)
8517                         event_type = "configuration change";
8518                 /* Stop sending new RAID offload reqs via the IO accelerator */
8519                 scsi_block_requests(h->scsi_host);
8520                 for (i = 0; i < h->ndevices; i++) {
8521                         h->dev[i]->offload_enabled = 0;
8522                         h->dev[i]->offload_to_be_enabled = 0;
8523                 }
8524                 hpsa_drain_accel_commands(h);
8525                 /* Set 'accelerator path config change' bit */
8526                 dev_warn(&h->pdev->dev,
8527                         "Acknowledging event: 0x%08x (HP SSD Smart Path %s)\n",
8528                         h->events, event_type);
8529                 writel(h->events, &(h->cfgtable->clear_event_notify));
8530                 /* Set the "clear event notify field update" bit 6 */
8531                 writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
8532                 /* Wait until ctlr clears 'clear event notify field', bit 6 */
8533                 hpsa_wait_for_clear_event_notify_ack(h);
8534                 scsi_unblock_requests(h->scsi_host);
8535         } else {
8536                 /* Acknowledge controller notification events. */
8537                 writel(h->events, &(h->cfgtable->clear_event_notify));
8538                 writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
8539                 hpsa_wait_for_clear_event_notify_ack(h);
8540 #if 0
8541                 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
8542                 hpsa_wait_for_mode_change_ack(h);
8543 #endif
8544         }
8545         return;
8546 }
8547
8548 /* Check a register on the controller to see if there are configuration
8549  * changes (added/changed/removed logical drives, etc.) which mean that
8550  * we should rescan the controller for devices.
8551  * Also check flag for driver-initiated rescan.
8552  */
8553 static int hpsa_ctlr_needs_rescan(struct ctlr_info *h)
8554 {
8555         if (h->drv_req_rescan) {
8556                 h->drv_req_rescan = 0;
8557                 return 1;
8558         }
8559
8560         if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8561                 return 0;
8562
8563         h->events = readl(&(h->cfgtable->event_notify));
8564         return h->events & RESCAN_REQUIRED_EVENT_BITS;
8565 }
8566
8567 /*
8568  * Check if any of the offline devices have become ready
8569  */
8570 static int hpsa_offline_devices_ready(struct ctlr_info *h)
8571 {
8572         unsigned long flags;
8573         struct offline_device_entry *d;
8574         struct list_head *this, *tmp;
8575
8576         spin_lock_irqsave(&h->offline_device_lock, flags);
8577         list_for_each_safe(this, tmp, &h->offline_device_list) {
8578                 d = list_entry(this, struct offline_device_entry,
8579                                 offline_list);
8580                 spin_unlock_irqrestore(&h->offline_device_lock, flags);
8581                 if (!hpsa_volume_offline(h, d->scsi3addr)) {
8582                         spin_lock_irqsave(&h->offline_device_lock, flags);
8583                         list_del(&d->offline_list);
8584                         spin_unlock_irqrestore(&h->offline_device_lock, flags);
8585                         return 1;
8586                 }
8587                 spin_lock_irqsave(&h->offline_device_lock, flags);
8588         }
8589         spin_unlock_irqrestore(&h->offline_device_lock, flags);
8590         return 0;
8591 }
8592
8593 static int hpsa_luns_changed(struct ctlr_info *h)
8594 {
8595         int rc = 1; /* assume there are changes */
8596         struct ReportLUNdata *logdev = NULL;
8597
8598         /* if we can't find out if lun data has changed,
8599          * assume that it has.
8600          */
8601
8602         if (!h->lastlogicals)
8603                 return rc;
8604
8605         logdev = kzalloc(sizeof(*logdev), GFP_KERNEL);
8606         if (!logdev)
8607                 return rc;
8608
8609         if (hpsa_scsi_do_report_luns(h, 1, logdev, sizeof(*logdev), 0)) {
8610                 dev_warn(&h->pdev->dev,
8611                         "report luns failed, can't track lun changes.\n");
8612                 goto out;
8613         }
8614         if (memcmp(logdev, h->lastlogicals, sizeof(*logdev))) {
8615                 dev_info(&h->pdev->dev,
8616                         "Lun changes detected.\n");
8617                 memcpy(h->lastlogicals, logdev, sizeof(*logdev));
8618                 goto out;
8619         } else
8620                 rc = 0; /* no changes detected. */
8621 out:
8622         kfree(logdev);
8623         return rc;
8624 }
8625
8626 static void hpsa_rescan_ctlr_worker(struct work_struct *work)
8627 {
8628         unsigned long flags;
8629         struct ctlr_info *h = container_of(to_delayed_work(work),
8630                                         struct ctlr_info, rescan_ctlr_work);
8631
8632
8633         if (h->remove_in_progress)
8634                 return;
8635
8636         /*
8637          * Do the scan after the reset
8638          */
8639         if (h->reset_in_progress) {
8640                 h->drv_req_rescan = 1;
8641                 return;
8642         }
8643
8644         if (hpsa_ctlr_needs_rescan(h) || hpsa_offline_devices_ready(h)) {
8645                 scsi_host_get(h->scsi_host);
8646                 hpsa_ack_ctlr_events(h);
8647                 hpsa_scan_start(h->scsi_host);
8648                 scsi_host_put(h->scsi_host);
8649         } else if (h->discovery_polling) {
8650                 hpsa_disable_rld_caching(h);
8651                 if (hpsa_luns_changed(h)) {
8652                         struct Scsi_Host *sh = NULL;
8653
8654                         dev_info(&h->pdev->dev,
8655                                 "driver discovery polling rescan.\n");
8656                         sh = scsi_host_get(h->scsi_host);
8657                         if (sh != NULL) {
8658                                 hpsa_scan_start(sh);
8659                                 scsi_host_put(sh);
8660                         }
8661                 }
8662         }
8663         spin_lock_irqsave(&h->lock, flags);
8664         if (!h->remove_in_progress)
8665                 queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
8666                                 h->heartbeat_sample_interval);
8667         spin_unlock_irqrestore(&h->lock, flags);
8668 }
8669
8670 static void hpsa_monitor_ctlr_worker(struct work_struct *work)
8671 {
8672         unsigned long flags;
8673         struct ctlr_info *h = container_of(to_delayed_work(work),
8674                                         struct ctlr_info, monitor_ctlr_work);
8675
8676         detect_controller_lockup(h);
8677         if (lockup_detected(h))
8678                 return;
8679
8680         spin_lock_irqsave(&h->lock, flags);
8681         if (!h->remove_in_progress)
8682                 schedule_delayed_work(&h->monitor_ctlr_work,
8683                                 h->heartbeat_sample_interval);
8684         spin_unlock_irqrestore(&h->lock, flags);
8685 }
8686
8687 static struct workqueue_struct *hpsa_create_controller_wq(struct ctlr_info *h,
8688                                                 char *name)
8689 {
8690         struct workqueue_struct *wq = NULL;
8691
8692         wq = alloc_ordered_workqueue("%s_%d_hpsa", 0, name, h->ctlr);
8693         if (!wq)
8694                 dev_err(&h->pdev->dev, "failed to create %s workqueue\n", name);
8695
8696         return wq;
8697 }
8698
8699 static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
8700 {
8701         int dac, rc;
8702         struct ctlr_info *h;
8703         int try_soft_reset = 0;
8704         unsigned long flags;
8705         u32 board_id;
8706
8707         if (number_of_controllers == 0)
8708                 printk(KERN_INFO DRIVER_NAME "\n");
8709
8710         rc = hpsa_lookup_board_id(pdev, &board_id);
8711         if (rc < 0) {
8712                 dev_warn(&pdev->dev, "Board ID not found\n");
8713                 return rc;
8714         }
8715
8716         rc = hpsa_init_reset_devices(pdev, board_id);
8717         if (rc) {
8718                 if (rc != -ENOTSUPP)
8719                         return rc;
8720                 /* If the reset fails in a particular way (it has no way to do
8721                  * a proper hard reset, so returns -ENOTSUPP) we can try to do
8722                  * a soft reset once we get the controller configured up to the
8723                  * point that it can accept a command.
8724                  */
8725                 try_soft_reset = 1;
8726                 rc = 0;
8727         }
8728
8729 reinit_after_soft_reset:
8730
8731         /* Command structures must be aligned on a 32-byte boundary because
8732          * the 5 lower bits of the address are used by the hardware. and by
8733          * the driver.  See comments in hpsa.h for more info.
8734          */
8735         BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
8736         h = kzalloc(sizeof(*h), GFP_KERNEL);
8737         if (!h) {
8738                 dev_err(&pdev->dev, "Failed to allocate controller head\n");
8739                 return -ENOMEM;
8740         }
8741
8742         h->pdev = pdev;
8743
8744         h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
8745         INIT_LIST_HEAD(&h->offline_device_list);
8746         spin_lock_init(&h->lock);
8747         spin_lock_init(&h->offline_device_lock);
8748         spin_lock_init(&h->scan_lock);
8749         atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
8750         atomic_set(&h->abort_cmds_available, HPSA_CMDS_RESERVED_FOR_ABORTS);
8751
8752         /* Allocate and clear per-cpu variable lockup_detected */
8753         h->lockup_detected = alloc_percpu(u32);
8754         if (!h->lockup_detected) {
8755                 dev_err(&h->pdev->dev, "Failed to allocate lockup detector\n");
8756                 rc = -ENOMEM;
8757                 goto clean1;    /* aer/h */
8758         }
8759         set_lockup_detected_for_all_cpus(h, 0);
8760
8761         rc = hpsa_pci_init(h);
8762         if (rc)
8763                 goto clean2;    /* lu, aer/h */
8764
8765         /* relies on h-> settings made by hpsa_pci_init, including
8766          * interrupt_mode h->intr */
8767         rc = hpsa_scsi_host_alloc(h);
8768         if (rc)
8769                 goto clean2_5;  /* pci, lu, aer/h */
8770
8771         sprintf(h->devname, HPSA "%d", h->scsi_host->host_no);
8772         h->ctlr = number_of_controllers;
8773         number_of_controllers++;
8774
8775         /* configure PCI DMA stuff */
8776         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
8777         if (rc == 0) {
8778                 dac = 1;
8779         } else {
8780                 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
8781                 if (rc == 0) {
8782                         dac = 0;
8783                 } else {
8784                         dev_err(&pdev->dev, "no suitable DMA available\n");
8785                         goto clean3;    /* shost, pci, lu, aer/h */
8786                 }
8787         }
8788
8789         /* make sure the board interrupts are off */
8790         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8791
8792         rc = hpsa_request_irqs(h, do_hpsa_intr_msi, do_hpsa_intr_intx);
8793         if (rc)
8794                 goto clean3;    /* shost, pci, lu, aer/h */
8795         rc = hpsa_alloc_cmd_pool(h);
8796         if (rc)
8797                 goto clean4;    /* irq, shost, pci, lu, aer/h */
8798         rc = hpsa_alloc_sg_chain_blocks(h);
8799         if (rc)
8800                 goto clean5;    /* cmd, irq, shost, pci, lu, aer/h */
8801         init_waitqueue_head(&h->scan_wait_queue);
8802         init_waitqueue_head(&h->abort_cmd_wait_queue);
8803         init_waitqueue_head(&h->event_sync_wait_queue);
8804         mutex_init(&h->reset_mutex);
8805         h->scan_finished = 1; /* no scan currently in progress */
8806         h->scan_waiting = 0;
8807
8808         pci_set_drvdata(pdev, h);
8809         h->ndevices = 0;
8810
8811         spin_lock_init(&h->devlock);
8812         rc = hpsa_put_ctlr_into_performant_mode(h);
8813         if (rc)
8814                 goto clean6; /* sg, cmd, irq, shost, pci, lu, aer/h */
8815
8816         /* create the resubmit workqueue */
8817         h->rescan_ctlr_wq = hpsa_create_controller_wq(h, "rescan");
8818         if (!h->rescan_ctlr_wq) {
8819                 rc = -ENOMEM;
8820                 goto clean7;
8821         }
8822
8823         h->resubmit_wq = hpsa_create_controller_wq(h, "resubmit");
8824         if (!h->resubmit_wq) {
8825                 rc = -ENOMEM;
8826                 goto clean7;    /* aer/h */
8827         }
8828
8829         /*
8830          * At this point, the controller is ready to take commands.
8831          * Now, if reset_devices and the hard reset didn't work, try
8832          * the soft reset and see if that works.
8833          */
8834         if (try_soft_reset) {
8835
8836                 /* This is kind of gross.  We may or may not get a completion
8837                  * from the soft reset command, and if we do, then the value
8838                  * from the fifo may or may not be valid.  So, we wait 10 secs
8839                  * after the reset throwing away any completions we get during
8840                  * that time.  Unregister the interrupt handler and register
8841                  * fake ones to scoop up any residual completions.
8842                  */
8843                 spin_lock_irqsave(&h->lock, flags);
8844                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
8845                 spin_unlock_irqrestore(&h->lock, flags);
8846                 hpsa_free_irqs(h);
8847                 rc = hpsa_request_irqs(h, hpsa_msix_discard_completions,
8848                                         hpsa_intx_discard_completions);
8849                 if (rc) {
8850                         dev_warn(&h->pdev->dev,
8851                                 "Failed to request_irq after soft reset.\n");
8852                         /*
8853                          * cannot goto clean7 or free_irqs will be called
8854                          * again. Instead, do its work
8855                          */
8856                         hpsa_free_performant_mode(h);   /* clean7 */
8857                         hpsa_free_sg_chain_blocks(h);   /* clean6 */
8858                         hpsa_free_cmd_pool(h);          /* clean5 */
8859                         /*
8860                          * skip hpsa_free_irqs(h) clean4 since that
8861                          * was just called before request_irqs failed
8862                          */
8863                         goto clean3;
8864                 }
8865
8866                 rc = hpsa_kdump_soft_reset(h);
8867                 if (rc)
8868                         /* Neither hard nor soft reset worked, we're hosed. */
8869                         goto clean7;
8870
8871                 dev_info(&h->pdev->dev, "Board READY.\n");
8872                 dev_info(&h->pdev->dev,
8873                         "Waiting for stale completions to drain.\n");
8874                 h->access.set_intr_mask(h, HPSA_INTR_ON);
8875                 msleep(10000);
8876                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
8877
8878                 rc = controller_reset_failed(h->cfgtable);
8879                 if (rc)
8880                         dev_info(&h->pdev->dev,
8881                                 "Soft reset appears to have failed.\n");
8882
8883                 /* since the controller's reset, we have to go back and re-init
8884                  * everything.  Easiest to just forget what we've done and do it
8885                  * all over again.
8886                  */
8887                 hpsa_undo_allocations_after_kdump_soft_reset(h);
8888                 try_soft_reset = 0;
8889                 if (rc)
8890                         /* don't goto clean, we already unallocated */
8891                         return -ENODEV;
8892
8893                 goto reinit_after_soft_reset;
8894         }
8895
8896         /* Enable Accelerated IO path at driver layer */
8897         h->acciopath_status = 1;
8898         /* Disable discovery polling.*/
8899         h->discovery_polling = 0;
8900
8901
8902         /* Turn the interrupts on so we can service requests */
8903         h->access.set_intr_mask(h, HPSA_INTR_ON);
8904
8905         hpsa_hba_inquiry(h);
8906
8907         h->lastlogicals = kzalloc(sizeof(*(h->lastlogicals)), GFP_KERNEL);
8908         if (!h->lastlogicals)
8909                 dev_info(&h->pdev->dev,
8910                         "Can't track change to report lun data\n");
8911
8912         /* hook into SCSI subsystem */
8913         rc = hpsa_scsi_add_host(h);
8914         if (rc)
8915                 goto clean7; /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
8916
8917         /* Monitor the controller for firmware lockups */
8918         h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
8919         INIT_DELAYED_WORK(&h->monitor_ctlr_work, hpsa_monitor_ctlr_worker);
8920         schedule_delayed_work(&h->monitor_ctlr_work,
8921                                 h->heartbeat_sample_interval);
8922         INIT_DELAYED_WORK(&h->rescan_ctlr_work, hpsa_rescan_ctlr_worker);
8923         queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
8924                                 h->heartbeat_sample_interval);
8925         return 0;
8926
8927 clean7: /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
8928         hpsa_free_performant_mode(h);
8929         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8930 clean6: /* sg, cmd, irq, pci, lockup, wq/aer/h */
8931         hpsa_free_sg_chain_blocks(h);
8932 clean5: /* cmd, irq, shost, pci, lu, aer/h */
8933         hpsa_free_cmd_pool(h);
8934 clean4: /* irq, shost, pci, lu, aer/h */
8935         hpsa_free_irqs(h);
8936 clean3: /* shost, pci, lu, aer/h */
8937         scsi_host_put(h->scsi_host);
8938         h->scsi_host = NULL;
8939 clean2_5: /* pci, lu, aer/h */
8940         hpsa_free_pci_init(h);
8941 clean2: /* lu, aer/h */
8942         if (h->lockup_detected) {
8943                 free_percpu(h->lockup_detected);
8944                 h->lockup_detected = NULL;
8945         }
8946 clean1: /* wq/aer/h */
8947         if (h->resubmit_wq) {
8948                 destroy_workqueue(h->resubmit_wq);
8949                 h->resubmit_wq = NULL;
8950         }
8951         if (h->rescan_ctlr_wq) {
8952                 destroy_workqueue(h->rescan_ctlr_wq);
8953                 h->rescan_ctlr_wq = NULL;
8954         }
8955         kfree(h);
8956         return rc;
8957 }
8958
8959 static void hpsa_flush_cache(struct ctlr_info *h)
8960 {
8961         char *flush_buf;
8962         struct CommandList *c;
8963         int rc;
8964
8965         if (unlikely(lockup_detected(h)))
8966                 return;
8967         flush_buf = kzalloc(4, GFP_KERNEL);
8968         if (!flush_buf)
8969                 return;
8970
8971         c = cmd_alloc(h);
8972
8973         if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
8974                 RAID_CTLR_LUNID, TYPE_CMD)) {
8975                 goto out;
8976         }
8977         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
8978                                         PCI_DMA_TODEVICE, DEFAULT_TIMEOUT);
8979         if (rc)
8980                 goto out;
8981         if (c->err_info->CommandStatus != 0)
8982 out:
8983                 dev_warn(&h->pdev->dev,
8984                         "error flushing cache on controller\n");
8985         cmd_free(h, c);
8986         kfree(flush_buf);
8987 }
8988
8989 /* Make controller gather fresh report lun data each time we
8990  * send down a report luns request
8991  */
8992 static void hpsa_disable_rld_caching(struct ctlr_info *h)
8993 {
8994         u32 *options;
8995         struct CommandList *c;
8996         int rc;
8997
8998         /* Don't bother trying to set diag options if locked up */
8999         if (unlikely(h->lockup_detected))
9000                 return;
9001
9002         options = kzalloc(sizeof(*options), GFP_KERNEL);
9003         if (!options)
9004                 return;
9005
9006         c = cmd_alloc(h);
9007
9008         /* first, get the current diag options settings */
9009         if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
9010                 RAID_CTLR_LUNID, TYPE_CMD))
9011                 goto errout;
9012
9013         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
9014                 PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
9015         if ((rc != 0) || (c->err_info->CommandStatus != 0))
9016                 goto errout;
9017
9018         /* Now, set the bit for disabling the RLD caching */
9019         *options |= HPSA_DIAG_OPTS_DISABLE_RLD_CACHING;
9020
9021         if (fill_cmd(c, BMIC_SET_DIAG_OPTIONS, h, options, 4, 0,
9022                 RAID_CTLR_LUNID, TYPE_CMD))
9023                 goto errout;
9024
9025         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
9026                 PCI_DMA_TODEVICE, DEFAULT_TIMEOUT);
9027         if ((rc != 0)  || (c->err_info->CommandStatus != 0))
9028                 goto errout;
9029
9030         /* Now verify that it got set: */
9031         if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
9032                 RAID_CTLR_LUNID, TYPE_CMD))
9033                 goto errout;
9034
9035         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
9036                 PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
9037         if ((rc != 0)  || (c->err_info->CommandStatus != 0))
9038                 goto errout;
9039
9040         if (*options & HPSA_DIAG_OPTS_DISABLE_RLD_CACHING)
9041                 goto out;
9042
9043 errout:
9044         dev_err(&h->pdev->dev,
9045                         "Error: failed to disable report lun data caching.\n");
9046 out:
9047         cmd_free(h, c);
9048         kfree(options);
9049 }
9050
9051 static void hpsa_shutdown(struct pci_dev *pdev)
9052 {
9053         struct ctlr_info *h;
9054
9055         h = pci_get_drvdata(pdev);
9056         /* Turn board interrupts off  and send the flush cache command
9057          * sendcmd will turn off interrupt, and send the flush...
9058          * To write all data in the battery backed cache to disks
9059          */
9060         hpsa_flush_cache(h);
9061         h->access.set_intr_mask(h, HPSA_INTR_OFF);
9062         hpsa_free_irqs(h);                      /* init_one 4 */
9063         hpsa_disable_interrupt_mode(h);         /* pci_init 2 */
9064 }
9065
9066 static void hpsa_free_device_info(struct ctlr_info *h)
9067 {
9068         int i;
9069
9070         for (i = 0; i < h->ndevices; i++) {
9071                 kfree(h->dev[i]);
9072                 h->dev[i] = NULL;
9073         }
9074 }
9075
9076 static void hpsa_remove_one(struct pci_dev *pdev)
9077 {
9078         struct ctlr_info *h;
9079         unsigned long flags;
9080
9081         if (pci_get_drvdata(pdev) == NULL) {
9082                 dev_err(&pdev->dev, "unable to remove device\n");
9083                 return;
9084         }
9085         h = pci_get_drvdata(pdev);
9086
9087         /* Get rid of any controller monitoring work items */
9088         spin_lock_irqsave(&h->lock, flags);
9089         h->remove_in_progress = 1;
9090         spin_unlock_irqrestore(&h->lock, flags);
9091         cancel_delayed_work_sync(&h->monitor_ctlr_work);
9092         cancel_delayed_work_sync(&h->rescan_ctlr_work);
9093         destroy_workqueue(h->rescan_ctlr_wq);
9094         destroy_workqueue(h->resubmit_wq);
9095
9096         /*
9097          * Call before disabling interrupts.
9098          * scsi_remove_host can trigger I/O operations especially
9099          * when multipath is enabled. There can be SYNCHRONIZE CACHE
9100          * operations which cannot complete and will hang the system.
9101          */
9102         if (h->scsi_host)
9103                 scsi_remove_host(h->scsi_host);         /* init_one 8 */
9104         /* includes hpsa_free_irqs - init_one 4 */
9105         /* includes hpsa_disable_interrupt_mode - pci_init 2 */
9106         hpsa_shutdown(pdev);
9107
9108         hpsa_free_device_info(h);               /* scan */
9109
9110         kfree(h->hba_inquiry_data);                     /* init_one 10 */
9111         h->hba_inquiry_data = NULL;                     /* init_one 10 */
9112         hpsa_free_ioaccel2_sg_chain_blocks(h);
9113         hpsa_free_performant_mode(h);                   /* init_one 7 */
9114         hpsa_free_sg_chain_blocks(h);                   /* init_one 6 */
9115         hpsa_free_cmd_pool(h);                          /* init_one 5 */
9116         kfree(h->lastlogicals);
9117
9118         /* hpsa_free_irqs already called via hpsa_shutdown init_one 4 */
9119
9120         scsi_host_put(h->scsi_host);                    /* init_one 3 */
9121         h->scsi_host = NULL;                            /* init_one 3 */
9122
9123         /* includes hpsa_disable_interrupt_mode - pci_init 2 */
9124         hpsa_free_pci_init(h);                          /* init_one 2.5 */
9125
9126         free_percpu(h->lockup_detected);                /* init_one 2 */
9127         h->lockup_detected = NULL;                      /* init_one 2 */
9128         /* (void) pci_disable_pcie_error_reporting(pdev); */    /* init_one 1 */
9129
9130         hpsa_delete_sas_host(h);
9131
9132         kfree(h);                                       /* init_one 1 */
9133 }
9134
9135 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
9136         __attribute__((unused)) pm_message_t state)
9137 {
9138         return -ENOSYS;
9139 }
9140
9141 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
9142 {
9143         return -ENOSYS;
9144 }
9145
9146 static struct pci_driver hpsa_pci_driver = {
9147         .name = HPSA,
9148         .probe = hpsa_init_one,
9149         .remove = hpsa_remove_one,
9150         .id_table = hpsa_pci_device_id, /* id_table */
9151         .shutdown = hpsa_shutdown,
9152         .suspend = hpsa_suspend,
9153         .resume = hpsa_resume,
9154 };
9155
9156 /* Fill in bucket_map[], given nsgs (the max number of
9157  * scatter gather elements supported) and bucket[],
9158  * which is an array of 8 integers.  The bucket[] array
9159  * contains 8 different DMA transfer sizes (in 16
9160  * byte increments) which the controller uses to fetch
9161  * commands.  This function fills in bucket_map[], which
9162  * maps a given number of scatter gather elements to one of
9163  * the 8 DMA transfer sizes.  The point of it is to allow the
9164  * controller to only do as much DMA as needed to fetch the
9165  * command, with the DMA transfer size encoded in the lower
9166  * bits of the command address.
9167  */
9168 static void  calc_bucket_map(int bucket[], int num_buckets,
9169         int nsgs, int min_blocks, u32 *bucket_map)
9170 {
9171         int i, j, b, size;
9172
9173         /* Note, bucket_map must have nsgs+1 entries. */
9174         for (i = 0; i <= nsgs; i++) {
9175                 /* Compute size of a command with i SG entries */
9176                 size = i + min_blocks;
9177                 b = num_buckets; /* Assume the biggest bucket */
9178                 /* Find the bucket that is just big enough */
9179                 for (j = 0; j < num_buckets; j++) {
9180                         if (bucket[j] >= size) {
9181                                 b = j;
9182                                 break;
9183                         }
9184                 }
9185                 /* for a command with i SG entries, use bucket b. */
9186                 bucket_map[i] = b;
9187         }
9188 }
9189
9190 /*
9191  * return -ENODEV on err, 0 on success (or no action)
9192  * allocates numerous items that must be freed later
9193  */
9194 static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support)
9195 {
9196         int i;
9197         unsigned long register_value;
9198         unsigned long transMethod = CFGTBL_Trans_Performant |
9199                         (trans_support & CFGTBL_Trans_use_short_tags) |
9200                                 CFGTBL_Trans_enable_directed_msix |
9201                         (trans_support & (CFGTBL_Trans_io_accel1 |
9202                                 CFGTBL_Trans_io_accel2));
9203         struct access_method access = SA5_performant_access;
9204
9205         /* This is a bit complicated.  There are 8 registers on
9206          * the controller which we write to to tell it 8 different
9207          * sizes of commands which there may be.  It's a way of
9208          * reducing the DMA done to fetch each command.  Encoded into
9209          * each command's tag are 3 bits which communicate to the controller
9210          * which of the eight sizes that command fits within.  The size of
9211          * each command depends on how many scatter gather entries there are.
9212          * Each SG entry requires 16 bytes.  The eight registers are programmed
9213          * with the number of 16-byte blocks a command of that size requires.
9214          * The smallest command possible requires 5 such 16 byte blocks.
9215          * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
9216          * blocks.  Note, this only extends to the SG entries contained
9217          * within the command block, and does not extend to chained blocks
9218          * of SG elements.   bft[] contains the eight values we write to
9219          * the registers.  They are not evenly distributed, but have more
9220          * sizes for small commands, and fewer sizes for larger commands.
9221          */
9222         int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
9223 #define MIN_IOACCEL2_BFT_ENTRY 5
9224 #define HPSA_IOACCEL2_HEADER_SZ 4
9225         int bft2[16] = {MIN_IOACCEL2_BFT_ENTRY, 6, 7, 8, 9, 10, 11, 12,
9226                         13, 14, 15, 16, 17, 18, 19,
9227                         HPSA_IOACCEL2_HEADER_SZ + IOACCEL2_MAXSGENTRIES};
9228         BUILD_BUG_ON(ARRAY_SIZE(bft2) != 16);
9229         BUILD_BUG_ON(ARRAY_SIZE(bft) != 8);
9230         BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) >
9231                                  16 * MIN_IOACCEL2_BFT_ENTRY);
9232         BUILD_BUG_ON(sizeof(struct ioaccel2_sg_element) != 16);
9233         BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
9234         /*  5 = 1 s/g entry or 4k
9235          *  6 = 2 s/g entry or 8k
9236          *  8 = 4 s/g entry or 16k
9237          * 10 = 6 s/g entry or 24k
9238          */
9239
9240         /* If the controller supports either ioaccel method then
9241          * we can also use the RAID stack submit path that does not
9242          * perform the superfluous readl() after each command submission.
9243          */
9244         if (trans_support & (CFGTBL_Trans_io_accel1 | CFGTBL_Trans_io_accel2))
9245                 access = SA5_performant_access_no_read;
9246
9247         /* Controller spec: zero out this buffer. */
9248         for (i = 0; i < h->nreply_queues; i++)
9249                 memset(h->reply_queue[i].head, 0, h->reply_queue_size);
9250
9251         bft[7] = SG_ENTRIES_IN_CMD + 4;
9252         calc_bucket_map(bft, ARRAY_SIZE(bft),
9253                                 SG_ENTRIES_IN_CMD, 4, h->blockFetchTable);
9254         for (i = 0; i < 8; i++)
9255                 writel(bft[i], &h->transtable->BlockFetch[i]);
9256
9257         /* size of controller ring buffer */
9258         writel(h->max_commands, &h->transtable->RepQSize);
9259         writel(h->nreply_queues, &h->transtable->RepQCount);
9260         writel(0, &h->transtable->RepQCtrAddrLow32);
9261         writel(0, &h->transtable->RepQCtrAddrHigh32);
9262
9263         for (i = 0; i < h->nreply_queues; i++) {
9264                 writel(0, &h->transtable->RepQAddr[i].upper);
9265                 writel(h->reply_queue[i].busaddr,
9266                         &h->transtable->RepQAddr[i].lower);
9267         }
9268
9269         writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
9270         writel(transMethod, &(h->cfgtable->HostWrite.TransportRequest));
9271         /*
9272          * enable outbound interrupt coalescing in accelerator mode;
9273          */
9274         if (trans_support & CFGTBL_Trans_io_accel1) {
9275                 access = SA5_ioaccel_mode1_access;
9276                 writel(10, &h->cfgtable->HostWrite.CoalIntDelay);
9277                 writel(4, &h->cfgtable->HostWrite.CoalIntCount);
9278         } else
9279                 if (trans_support & CFGTBL_Trans_io_accel2)
9280                         access = SA5_ioaccel_mode2_access;
9281         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9282         if (hpsa_wait_for_mode_change_ack(h)) {
9283                 dev_err(&h->pdev->dev,
9284                         "performant mode problem - doorbell timeout\n");
9285                 return -ENODEV;
9286         }
9287         register_value = readl(&(h->cfgtable->TransportActive));
9288         if (!(register_value & CFGTBL_Trans_Performant)) {
9289                 dev_err(&h->pdev->dev,
9290                         "performant mode problem - transport not active\n");
9291                 return -ENODEV;
9292         }
9293         /* Change the access methods to the performant access methods */
9294         h->access = access;
9295         h->transMethod = transMethod;
9296
9297         if (!((trans_support & CFGTBL_Trans_io_accel1) ||
9298                 (trans_support & CFGTBL_Trans_io_accel2)))
9299                 return 0;
9300
9301         if (trans_support & CFGTBL_Trans_io_accel1) {
9302                 /* Set up I/O accelerator mode */
9303                 for (i = 0; i < h->nreply_queues; i++) {
9304                         writel(i, h->vaddr + IOACCEL_MODE1_REPLY_QUEUE_INDEX);
9305                         h->reply_queue[i].current_entry =
9306                                 readl(h->vaddr + IOACCEL_MODE1_PRODUCER_INDEX);
9307                 }
9308                 bft[7] = h->ioaccel_maxsg + 8;
9309                 calc_bucket_map(bft, ARRAY_SIZE(bft), h->ioaccel_maxsg, 8,
9310                                 h->ioaccel1_blockFetchTable);
9311
9312                 /* initialize all reply queue entries to unused */
9313                 for (i = 0; i < h->nreply_queues; i++)
9314                         memset(h->reply_queue[i].head,
9315                                 (u8) IOACCEL_MODE1_REPLY_UNUSED,
9316                                 h->reply_queue_size);
9317
9318                 /* set all the constant fields in the accelerator command
9319                  * frames once at init time to save CPU cycles later.
9320                  */
9321                 for (i = 0; i < h->nr_cmds; i++) {
9322                         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[i];
9323
9324                         cp->function = IOACCEL1_FUNCTION_SCSIIO;
9325                         cp->err_info = (u32) (h->errinfo_pool_dhandle +
9326                                         (i * sizeof(struct ErrorInfo)));
9327                         cp->err_info_len = sizeof(struct ErrorInfo);
9328                         cp->sgl_offset = IOACCEL1_SGLOFFSET;
9329                         cp->host_context_flags =
9330                                 cpu_to_le16(IOACCEL1_HCFLAGS_CISS_FORMAT);
9331                         cp->timeout_sec = 0;
9332                         cp->ReplyQueue = 0;
9333                         cp->tag =
9334                                 cpu_to_le64((i << DIRECT_LOOKUP_SHIFT));
9335                         cp->host_addr =
9336                                 cpu_to_le64(h->ioaccel_cmd_pool_dhandle +
9337                                         (i * sizeof(struct io_accel1_cmd)));
9338                 }
9339         } else if (trans_support & CFGTBL_Trans_io_accel2) {
9340                 u64 cfg_offset, cfg_base_addr_index;
9341                 u32 bft2_offset, cfg_base_addr;
9342                 int rc;
9343
9344                 rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
9345                         &cfg_base_addr_index, &cfg_offset);
9346                 BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) != 64);
9347                 bft2[15] = h->ioaccel_maxsg + HPSA_IOACCEL2_HEADER_SZ;
9348                 calc_bucket_map(bft2, ARRAY_SIZE(bft2), h->ioaccel_maxsg,
9349                                 4, h->ioaccel2_blockFetchTable);
9350                 bft2_offset = readl(&h->cfgtable->io_accel_request_size_offset);
9351                 BUILD_BUG_ON(offsetof(struct CfgTable,
9352                                 io_accel_request_size_offset) != 0xb8);
9353                 h->ioaccel2_bft2_regs =
9354                         remap_pci_mem(pci_resource_start(h->pdev,
9355                                         cfg_base_addr_index) +
9356                                         cfg_offset + bft2_offset,
9357                                         ARRAY_SIZE(bft2) *
9358                                         sizeof(*h->ioaccel2_bft2_regs));
9359                 for (i = 0; i < ARRAY_SIZE(bft2); i++)
9360                         writel(bft2[i], &h->ioaccel2_bft2_regs[i]);
9361         }
9362         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9363         if (hpsa_wait_for_mode_change_ack(h)) {
9364                 dev_err(&h->pdev->dev,
9365                         "performant mode problem - enabling ioaccel mode\n");
9366                 return -ENODEV;
9367         }
9368         return 0;
9369 }
9370
9371 /* Free ioaccel1 mode command blocks and block fetch table */
9372 static void hpsa_free_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9373 {
9374         if (h->ioaccel_cmd_pool) {
9375                 pci_free_consistent(h->pdev,
9376                         h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
9377                         h->ioaccel_cmd_pool,
9378                         h->ioaccel_cmd_pool_dhandle);
9379                 h->ioaccel_cmd_pool = NULL;
9380                 h->ioaccel_cmd_pool_dhandle = 0;
9381         }
9382         kfree(h->ioaccel1_blockFetchTable);
9383         h->ioaccel1_blockFetchTable = NULL;
9384 }
9385
9386 /* Allocate ioaccel1 mode command blocks and block fetch table */
9387 static int hpsa_alloc_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9388 {
9389         h->ioaccel_maxsg =
9390                 readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
9391         if (h->ioaccel_maxsg > IOACCEL1_MAXSGENTRIES)
9392                 h->ioaccel_maxsg = IOACCEL1_MAXSGENTRIES;
9393
9394         /* Command structures must be aligned on a 128-byte boundary
9395          * because the 7 lower bits of the address are used by the
9396          * hardware.
9397          */
9398         BUILD_BUG_ON(sizeof(struct io_accel1_cmd) %
9399                         IOACCEL1_COMMANDLIST_ALIGNMENT);
9400         h->ioaccel_cmd_pool =
9401                 pci_alloc_consistent(h->pdev,
9402                         h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
9403                         &(h->ioaccel_cmd_pool_dhandle));
9404
9405         h->ioaccel1_blockFetchTable =
9406                 kmalloc(((h->ioaccel_maxsg + 1) *
9407                                 sizeof(u32)), GFP_KERNEL);
9408
9409         if ((h->ioaccel_cmd_pool == NULL) ||
9410                 (h->ioaccel1_blockFetchTable == NULL))
9411                 goto clean_up;
9412
9413         memset(h->ioaccel_cmd_pool, 0,
9414                 h->nr_cmds * sizeof(*h->ioaccel_cmd_pool));
9415         return 0;
9416
9417 clean_up:
9418         hpsa_free_ioaccel1_cmd_and_bft(h);
9419         return -ENOMEM;
9420 }
9421
9422 /* Free ioaccel2 mode command blocks and block fetch table */
9423 static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9424 {
9425         hpsa_free_ioaccel2_sg_chain_blocks(h);
9426
9427         if (h->ioaccel2_cmd_pool) {
9428                 pci_free_consistent(h->pdev,
9429                         h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
9430                         h->ioaccel2_cmd_pool,
9431                         h->ioaccel2_cmd_pool_dhandle);
9432                 h->ioaccel2_cmd_pool = NULL;
9433                 h->ioaccel2_cmd_pool_dhandle = 0;
9434         }
9435         kfree(h->ioaccel2_blockFetchTable);
9436         h->ioaccel2_blockFetchTable = NULL;
9437 }
9438
9439 /* Allocate ioaccel2 mode command blocks and block fetch table */
9440 static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9441 {
9442         int rc;
9443
9444         /* Allocate ioaccel2 mode command blocks and block fetch table */
9445
9446         h->ioaccel_maxsg =
9447                 readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
9448         if (h->ioaccel_maxsg > IOACCEL2_MAXSGENTRIES)
9449                 h->ioaccel_maxsg = IOACCEL2_MAXSGENTRIES;
9450
9451         BUILD_BUG_ON(sizeof(struct io_accel2_cmd) %
9452                         IOACCEL2_COMMANDLIST_ALIGNMENT);
9453         h->ioaccel2_cmd_pool =
9454                 pci_alloc_consistent(h->pdev,
9455                         h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
9456                         &(h->ioaccel2_cmd_pool_dhandle));
9457
9458         h->ioaccel2_blockFetchTable =
9459                 kmalloc(((h->ioaccel_maxsg + 1) *
9460                                 sizeof(u32)), GFP_KERNEL);
9461
9462         if ((h->ioaccel2_cmd_pool == NULL) ||
9463                 (h->ioaccel2_blockFetchTable == NULL)) {
9464                 rc = -ENOMEM;
9465                 goto clean_up;
9466         }
9467
9468         rc = hpsa_allocate_ioaccel2_sg_chain_blocks(h);
9469         if (rc)
9470                 goto clean_up;
9471
9472         memset(h->ioaccel2_cmd_pool, 0,
9473                 h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool));
9474         return 0;
9475
9476 clean_up:
9477         hpsa_free_ioaccel2_cmd_and_bft(h);
9478         return rc;
9479 }
9480
9481 /* Free items allocated by hpsa_put_ctlr_into_performant_mode */
9482 static void hpsa_free_performant_mode(struct ctlr_info *h)
9483 {
9484         kfree(h->blockFetchTable);
9485         h->blockFetchTable = NULL;
9486         hpsa_free_reply_queues(h);
9487         hpsa_free_ioaccel1_cmd_and_bft(h);
9488         hpsa_free_ioaccel2_cmd_and_bft(h);
9489 }
9490
9491 /* return -ENODEV on error, 0 on success (or no action)
9492  * allocates numerous items that must be freed later
9493  */
9494 static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
9495 {
9496         u32 trans_support;
9497         unsigned long transMethod = CFGTBL_Trans_Performant |
9498                                         CFGTBL_Trans_use_short_tags;
9499         int i, rc;
9500
9501         if (hpsa_simple_mode)
9502                 return 0;
9503
9504         trans_support = readl(&(h->cfgtable->TransportSupport));
9505         if (!(trans_support & PERFORMANT_MODE))
9506                 return 0;
9507
9508         /* Check for I/O accelerator mode support */
9509         if (trans_support & CFGTBL_Trans_io_accel1) {
9510                 transMethod |= CFGTBL_Trans_io_accel1 |
9511                                 CFGTBL_Trans_enable_directed_msix;
9512                 rc = hpsa_alloc_ioaccel1_cmd_and_bft(h);
9513                 if (rc)
9514                         return rc;
9515         } else if (trans_support & CFGTBL_Trans_io_accel2) {
9516                 transMethod |= CFGTBL_Trans_io_accel2 |
9517                                 CFGTBL_Trans_enable_directed_msix;
9518                 rc = hpsa_alloc_ioaccel2_cmd_and_bft(h);
9519                 if (rc)
9520                         return rc;
9521         }
9522
9523         h->nreply_queues = h->msix_vectors > 0 ? h->msix_vectors : 1;
9524         hpsa_get_max_perf_mode_cmds(h);
9525         /* Performant mode ring buffer and supporting data structures */
9526         h->reply_queue_size = h->max_commands * sizeof(u64);
9527
9528         for (i = 0; i < h->nreply_queues; i++) {
9529                 h->reply_queue[i].head = pci_alloc_consistent(h->pdev,
9530                                                 h->reply_queue_size,
9531                                                 &(h->reply_queue[i].busaddr));
9532                 if (!h->reply_queue[i].head) {
9533                         rc = -ENOMEM;
9534                         goto clean1;    /* rq, ioaccel */
9535                 }
9536                 h->reply_queue[i].size = h->max_commands;
9537                 h->reply_queue[i].wraparound = 1;  /* spec: init to 1 */
9538                 h->reply_queue[i].current_entry = 0;
9539         }
9540
9541         /* Need a block fetch table for performant mode */
9542         h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
9543                                 sizeof(u32)), GFP_KERNEL);
9544         if (!h->blockFetchTable) {
9545                 rc = -ENOMEM;
9546                 goto clean1;    /* rq, ioaccel */
9547         }
9548
9549         rc = hpsa_enter_performant_mode(h, trans_support);
9550         if (rc)
9551                 goto clean2;    /* bft, rq, ioaccel */
9552         return 0;
9553
9554 clean2: /* bft, rq, ioaccel */
9555         kfree(h->blockFetchTable);
9556         h->blockFetchTable = NULL;
9557 clean1: /* rq, ioaccel */
9558         hpsa_free_reply_queues(h);
9559         hpsa_free_ioaccel1_cmd_and_bft(h);
9560         hpsa_free_ioaccel2_cmd_and_bft(h);
9561         return rc;
9562 }
9563
9564 static int is_accelerated_cmd(struct CommandList *c)
9565 {
9566         return c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_IOACCEL2;
9567 }
9568
9569 static void hpsa_drain_accel_commands(struct ctlr_info *h)
9570 {
9571         struct CommandList *c = NULL;
9572         int i, accel_cmds_out;
9573         int refcount;
9574
9575         do { /* wait for all outstanding ioaccel commands to drain out */
9576                 accel_cmds_out = 0;
9577                 for (i = 0; i < h->nr_cmds; i++) {
9578                         c = h->cmd_pool + i;
9579                         refcount = atomic_inc_return(&c->refcount);
9580                         if (refcount > 1) /* Command is allocated */
9581                                 accel_cmds_out += is_accelerated_cmd(c);
9582                         cmd_free(h, c);
9583                 }
9584                 if (accel_cmds_out <= 0)
9585                         break;
9586                 msleep(100);
9587         } while (1);
9588 }
9589
9590 static struct hpsa_sas_phy *hpsa_alloc_sas_phy(
9591                                 struct hpsa_sas_port *hpsa_sas_port)
9592 {
9593         struct hpsa_sas_phy *hpsa_sas_phy;
9594         struct sas_phy *phy;
9595
9596         hpsa_sas_phy = kzalloc(sizeof(*hpsa_sas_phy), GFP_KERNEL);
9597         if (!hpsa_sas_phy)
9598                 return NULL;
9599
9600         phy = sas_phy_alloc(hpsa_sas_port->parent_node->parent_dev,
9601                 hpsa_sas_port->next_phy_index);
9602         if (!phy) {
9603                 kfree(hpsa_sas_phy);
9604                 return NULL;
9605         }
9606
9607         hpsa_sas_port->next_phy_index++;
9608         hpsa_sas_phy->phy = phy;
9609         hpsa_sas_phy->parent_port = hpsa_sas_port;
9610
9611         return hpsa_sas_phy;
9612 }
9613
9614 static void hpsa_free_sas_phy(struct hpsa_sas_phy *hpsa_sas_phy)
9615 {
9616         struct sas_phy *phy = hpsa_sas_phy->phy;
9617
9618         sas_port_delete_phy(hpsa_sas_phy->parent_port->port, phy);
9619         sas_phy_free(phy);
9620         if (hpsa_sas_phy->added_to_port)
9621                 list_del(&hpsa_sas_phy->phy_list_entry);
9622         kfree(hpsa_sas_phy);
9623 }
9624
9625 static int hpsa_sas_port_add_phy(struct hpsa_sas_phy *hpsa_sas_phy)
9626 {
9627         int rc;
9628         struct hpsa_sas_port *hpsa_sas_port;
9629         struct sas_phy *phy;
9630         struct sas_identify *identify;
9631
9632         hpsa_sas_port = hpsa_sas_phy->parent_port;
9633         phy = hpsa_sas_phy->phy;
9634
9635         identify = &phy->identify;
9636         memset(identify, 0, sizeof(*identify));
9637         identify->sas_address = hpsa_sas_port->sas_address;
9638         identify->device_type = SAS_END_DEVICE;
9639         identify->initiator_port_protocols = SAS_PROTOCOL_STP;
9640         identify->target_port_protocols = SAS_PROTOCOL_STP;
9641         phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
9642         phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
9643         phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
9644         phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
9645         phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
9646
9647         rc = sas_phy_add(hpsa_sas_phy->phy);
9648         if (rc)
9649                 return rc;
9650
9651         sas_port_add_phy(hpsa_sas_port->port, hpsa_sas_phy->phy);
9652         list_add_tail(&hpsa_sas_phy->phy_list_entry,
9653                         &hpsa_sas_port->phy_list_head);
9654         hpsa_sas_phy->added_to_port = true;
9655
9656         return 0;
9657 }
9658
9659 static int
9660         hpsa_sas_port_add_rphy(struct hpsa_sas_port *hpsa_sas_port,
9661                                 struct sas_rphy *rphy)
9662 {
9663         struct sas_identify *identify;
9664
9665         identify = &rphy->identify;
9666         identify->sas_address = hpsa_sas_port->sas_address;
9667         identify->initiator_port_protocols = SAS_PROTOCOL_STP;
9668         identify->target_port_protocols = SAS_PROTOCOL_STP;
9669
9670         return sas_rphy_add(rphy);
9671 }
9672
9673 static struct hpsa_sas_port
9674         *hpsa_alloc_sas_port(struct hpsa_sas_node *hpsa_sas_node,
9675                                 u64 sas_address)
9676 {
9677         int rc;
9678         struct hpsa_sas_port *hpsa_sas_port;
9679         struct sas_port *port;
9680
9681         hpsa_sas_port = kzalloc(sizeof(*hpsa_sas_port), GFP_KERNEL);
9682         if (!hpsa_sas_port)
9683                 return NULL;
9684
9685         INIT_LIST_HEAD(&hpsa_sas_port->phy_list_head);
9686         hpsa_sas_port->parent_node = hpsa_sas_node;
9687
9688         port = sas_port_alloc_num(hpsa_sas_node->parent_dev);
9689         if (!port)
9690                 goto free_hpsa_port;
9691
9692         rc = sas_port_add(port);
9693         if (rc)
9694                 goto free_sas_port;
9695
9696         hpsa_sas_port->port = port;
9697         hpsa_sas_port->sas_address = sas_address;
9698         list_add_tail(&hpsa_sas_port->port_list_entry,
9699                         &hpsa_sas_node->port_list_head);
9700
9701         return hpsa_sas_port;
9702
9703 free_sas_port:
9704         sas_port_free(port);
9705 free_hpsa_port:
9706         kfree(hpsa_sas_port);
9707
9708         return NULL;
9709 }
9710
9711 static void hpsa_free_sas_port(struct hpsa_sas_port *hpsa_sas_port)
9712 {
9713         struct hpsa_sas_phy *hpsa_sas_phy;
9714         struct hpsa_sas_phy *next;
9715
9716         list_for_each_entry_safe(hpsa_sas_phy, next,
9717                         &hpsa_sas_port->phy_list_head, phy_list_entry)
9718                 hpsa_free_sas_phy(hpsa_sas_phy);
9719
9720         sas_port_delete(hpsa_sas_port->port);
9721         list_del(&hpsa_sas_port->port_list_entry);
9722         kfree(hpsa_sas_port);
9723 }
9724
9725 static struct hpsa_sas_node *hpsa_alloc_sas_node(struct device *parent_dev)
9726 {
9727         struct hpsa_sas_node *hpsa_sas_node;
9728
9729         hpsa_sas_node = kzalloc(sizeof(*hpsa_sas_node), GFP_KERNEL);
9730         if (hpsa_sas_node) {
9731                 hpsa_sas_node->parent_dev = parent_dev;
9732                 INIT_LIST_HEAD(&hpsa_sas_node->port_list_head);
9733         }
9734
9735         return hpsa_sas_node;
9736 }
9737
9738 static void hpsa_free_sas_node(struct hpsa_sas_node *hpsa_sas_node)
9739 {
9740         struct hpsa_sas_port *hpsa_sas_port;
9741         struct hpsa_sas_port *next;
9742
9743         if (!hpsa_sas_node)
9744                 return;
9745
9746         list_for_each_entry_safe(hpsa_sas_port, next,
9747                         &hpsa_sas_node->port_list_head, port_list_entry)
9748                 hpsa_free_sas_port(hpsa_sas_port);
9749
9750         kfree(hpsa_sas_node);
9751 }
9752
9753 static struct hpsa_scsi_dev_t
9754         *hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
9755                                         struct sas_rphy *rphy)
9756 {
9757         int i;
9758         struct hpsa_scsi_dev_t *device;
9759
9760         for (i = 0; i < h->ndevices; i++) {
9761                 device = h->dev[i];
9762                 if (!device->sas_port)
9763                         continue;
9764                 if (device->sas_port->rphy == rphy)
9765                         return device;
9766         }
9767
9768         return NULL;
9769 }
9770
9771 static int hpsa_add_sas_host(struct ctlr_info *h)
9772 {
9773         int rc;
9774         struct device *parent_dev;
9775         struct hpsa_sas_node *hpsa_sas_node;
9776         struct hpsa_sas_port *hpsa_sas_port;
9777         struct hpsa_sas_phy *hpsa_sas_phy;
9778
9779         parent_dev = &h->scsi_host->shost_gendev;
9780
9781         hpsa_sas_node = hpsa_alloc_sas_node(parent_dev);
9782         if (!hpsa_sas_node)
9783                 return -ENOMEM;
9784
9785         hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, h->sas_address);
9786         if (!hpsa_sas_port) {
9787                 rc = -ENODEV;
9788                 goto free_sas_node;
9789         }
9790
9791         hpsa_sas_phy = hpsa_alloc_sas_phy(hpsa_sas_port);
9792         if (!hpsa_sas_phy) {
9793                 rc = -ENODEV;
9794                 goto free_sas_port;
9795         }
9796
9797         rc = hpsa_sas_port_add_phy(hpsa_sas_phy);
9798         if (rc)
9799                 goto free_sas_phy;
9800
9801         h->sas_host = hpsa_sas_node;
9802
9803         return 0;
9804
9805 free_sas_phy:
9806         hpsa_free_sas_phy(hpsa_sas_phy);
9807 free_sas_port:
9808         hpsa_free_sas_port(hpsa_sas_port);
9809 free_sas_node:
9810         hpsa_free_sas_node(hpsa_sas_node);
9811
9812         return rc;
9813 }
9814
9815 static void hpsa_delete_sas_host(struct ctlr_info *h)
9816 {
9817         hpsa_free_sas_node(h->sas_host);
9818 }
9819
9820 static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
9821                                 struct hpsa_scsi_dev_t *device)
9822 {
9823         int rc;
9824         struct hpsa_sas_port *hpsa_sas_port;
9825         struct sas_rphy *rphy;
9826
9827         hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, device->sas_address);
9828         if (!hpsa_sas_port)
9829                 return -ENOMEM;
9830
9831         rphy = sas_end_device_alloc(hpsa_sas_port->port);
9832         if (!rphy) {
9833                 rc = -ENODEV;
9834                 goto free_sas_port;
9835         }
9836
9837         hpsa_sas_port->rphy = rphy;
9838         device->sas_port = hpsa_sas_port;
9839
9840         rc = hpsa_sas_port_add_rphy(hpsa_sas_port, rphy);
9841         if (rc)
9842                 goto free_sas_port;
9843
9844         return 0;
9845
9846 free_sas_port:
9847         hpsa_free_sas_port(hpsa_sas_port);
9848         device->sas_port = NULL;
9849
9850         return rc;
9851 }
9852
9853 static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device)
9854 {
9855         if (device->sas_port) {
9856                 hpsa_free_sas_port(device->sas_port);
9857                 device->sas_port = NULL;
9858         }
9859 }
9860
9861 static int
9862 hpsa_sas_get_linkerrors(struct sas_phy *phy)
9863 {
9864         return 0;
9865 }
9866
9867 static int
9868 hpsa_sas_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
9869 {
9870         *identifier = 0;
9871         return 0;
9872 }
9873
9874 static int
9875 hpsa_sas_get_bay_identifier(struct sas_rphy *rphy)
9876 {
9877         return -ENXIO;
9878 }
9879
9880 static int
9881 hpsa_sas_phy_reset(struct sas_phy *phy, int hard_reset)
9882 {
9883         return 0;
9884 }
9885
9886 static int
9887 hpsa_sas_phy_enable(struct sas_phy *phy, int enable)
9888 {
9889         return 0;
9890 }
9891
9892 static int
9893 hpsa_sas_phy_setup(struct sas_phy *phy)
9894 {
9895         return 0;
9896 }
9897
9898 static void
9899 hpsa_sas_phy_release(struct sas_phy *phy)
9900 {
9901 }
9902
9903 static int
9904 hpsa_sas_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates)
9905 {
9906         return -EINVAL;
9907 }
9908
9909 /* SMP = Serial Management Protocol */
9910 static int
9911 hpsa_sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
9912 struct request *req)
9913 {
9914         return -EINVAL;
9915 }
9916
9917 static struct sas_function_template hpsa_sas_transport_functions = {
9918         .get_linkerrors = hpsa_sas_get_linkerrors,
9919         .get_enclosure_identifier = hpsa_sas_get_enclosure_identifier,
9920         .get_bay_identifier = hpsa_sas_get_bay_identifier,
9921         .phy_reset = hpsa_sas_phy_reset,
9922         .phy_enable = hpsa_sas_phy_enable,
9923         .phy_setup = hpsa_sas_phy_setup,
9924         .phy_release = hpsa_sas_phy_release,
9925         .set_phy_speed = hpsa_sas_phy_speed,
9926         .smp_handler = hpsa_sas_smp_handler,
9927 };
9928
9929 /*
9930  *  This is it.  Register the PCI driver information for the cards we control
9931  *  the OS will call our registered routines when it finds one of our cards.
9932  */
9933 static int __init hpsa_init(void)
9934 {
9935         int rc;
9936
9937         hpsa_sas_transport_template =
9938                 sas_attach_transport(&hpsa_sas_transport_functions);
9939         if (!hpsa_sas_transport_template)
9940                 return -ENODEV;
9941
9942         rc = pci_register_driver(&hpsa_pci_driver);
9943
9944         if (rc)
9945                 sas_release_transport(hpsa_sas_transport_template);
9946
9947         return rc;
9948 }
9949
9950 static void __exit hpsa_cleanup(void)
9951 {
9952         pci_unregister_driver(&hpsa_pci_driver);
9953         sas_release_transport(hpsa_sas_transport_template);
9954 }
9955
9956 static void __attribute__((unused)) verify_offsets(void)
9957 {
9958 #define VERIFY_OFFSET(member, offset) \
9959         BUILD_BUG_ON(offsetof(struct raid_map_data, member) != offset)
9960
9961         VERIFY_OFFSET(structure_size, 0);
9962         VERIFY_OFFSET(volume_blk_size, 4);
9963         VERIFY_OFFSET(volume_blk_cnt, 8);
9964         VERIFY_OFFSET(phys_blk_shift, 16);
9965         VERIFY_OFFSET(parity_rotation_shift, 17);
9966         VERIFY_OFFSET(strip_size, 18);
9967         VERIFY_OFFSET(disk_starting_blk, 20);
9968         VERIFY_OFFSET(disk_blk_cnt, 28);
9969         VERIFY_OFFSET(data_disks_per_row, 36);
9970         VERIFY_OFFSET(metadata_disks_per_row, 38);
9971         VERIFY_OFFSET(row_cnt, 40);
9972         VERIFY_OFFSET(layout_map_count, 42);
9973         VERIFY_OFFSET(flags, 44);
9974         VERIFY_OFFSET(dekindex, 46);
9975         /* VERIFY_OFFSET(reserved, 48 */
9976         VERIFY_OFFSET(data, 64);
9977
9978 #undef VERIFY_OFFSET
9979
9980 #define VERIFY_OFFSET(member, offset) \
9981         BUILD_BUG_ON(offsetof(struct io_accel2_cmd, member) != offset)
9982
9983         VERIFY_OFFSET(IU_type, 0);
9984         VERIFY_OFFSET(direction, 1);
9985         VERIFY_OFFSET(reply_queue, 2);
9986         /* VERIFY_OFFSET(reserved1, 3);  */
9987         VERIFY_OFFSET(scsi_nexus, 4);
9988         VERIFY_OFFSET(Tag, 8);
9989         VERIFY_OFFSET(cdb, 16);
9990         VERIFY_OFFSET(cciss_lun, 32);
9991         VERIFY_OFFSET(data_len, 40);
9992         VERIFY_OFFSET(cmd_priority_task_attr, 44);
9993         VERIFY_OFFSET(sg_count, 45);
9994         /* VERIFY_OFFSET(reserved3 */
9995         VERIFY_OFFSET(err_ptr, 48);
9996         VERIFY_OFFSET(err_len, 56);
9997         /* VERIFY_OFFSET(reserved4  */
9998         VERIFY_OFFSET(sg, 64);
9999
10000 #undef VERIFY_OFFSET
10001
10002 #define VERIFY_OFFSET(member, offset) \
10003         BUILD_BUG_ON(offsetof(struct io_accel1_cmd, member) != offset)
10004
10005         VERIFY_OFFSET(dev_handle, 0x00);
10006         VERIFY_OFFSET(reserved1, 0x02);
10007         VERIFY_OFFSET(function, 0x03);
10008         VERIFY_OFFSET(reserved2, 0x04);
10009         VERIFY_OFFSET(err_info, 0x0C);
10010         VERIFY_OFFSET(reserved3, 0x10);
10011         VERIFY_OFFSET(err_info_len, 0x12);
10012         VERIFY_OFFSET(reserved4, 0x13);
10013         VERIFY_OFFSET(sgl_offset, 0x14);
10014         VERIFY_OFFSET(reserved5, 0x15);
10015         VERIFY_OFFSET(transfer_len, 0x1C);
10016         VERIFY_OFFSET(reserved6, 0x20);
10017         VERIFY_OFFSET(io_flags, 0x24);
10018         VERIFY_OFFSET(reserved7, 0x26);
10019         VERIFY_OFFSET(LUN, 0x34);
10020         VERIFY_OFFSET(control, 0x3C);
10021         VERIFY_OFFSET(CDB, 0x40);
10022         VERIFY_OFFSET(reserved8, 0x50);
10023         VERIFY_OFFSET(host_context_flags, 0x60);
10024         VERIFY_OFFSET(timeout_sec, 0x62);
10025         VERIFY_OFFSET(ReplyQueue, 0x64);
10026         VERIFY_OFFSET(reserved9, 0x65);
10027         VERIFY_OFFSET(tag, 0x68);
10028         VERIFY_OFFSET(host_addr, 0x70);
10029         VERIFY_OFFSET(CISS_LUN, 0x78);
10030         VERIFY_OFFSET(SG, 0x78 + 8);
10031 #undef VERIFY_OFFSET
10032 }
10033
10034 module_init(hpsa_init);
10035 module_exit(hpsa_cleanup);