drivers/scsi/hpsa.c

   1 /*
   2  *    Disk Array driver for HP Smart Array SAS controllers
   3  *    Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
   4  *
   5  *    This program is free software; you can redistribute it and/or modify
   6  *    it under the terms of the GNU General Public License as published by
   7  *    the Free Software Foundation; version 2 of the License.
   8  *
   9  *    This program is distributed in the hope that it will be useful,
  10  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  12  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  13  *
  14  *    You should have received a copy of the GNU General Public License
  15  *    along with this program; if not, write to the Free Software
  16  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  *
  18  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/types.h>
  25 #include <linux/pci.h>
  26 #include <linux/kernel.h>
  27 #include <linux/slab.h>
  28 #include <linux/delay.h>
  29 #include <linux/fs.h>
  30 #include <linux/timer.h>
  31 #include <linux/seq_file.h>
  32 #include <linux/init.h>
  33 #include <linux/spinlock.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/compat.h>
  36 #include <linux/blktrace_api.h>
  37 #include <linux/uaccess.h>
  38 #include <linux/io.h>
  39 #include <linux/dma-mapping.h>
  40 #include <linux/completion.h>
  41 #include <linux/moduleparam.h>
  42 #include <scsi/scsi.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <scsi/scsi_device.h>
  45 #include <scsi/scsi_host.h>
  46 #include <scsi/scsi_tcq.h>
  47 #include <linux/cciss_ioctl.h>
  48 #include <linux/string.h>
  49 #include <linux/bitmap.h>
  50 #include <asm/atomic.h>
  51 #include <linux/kthread.h>
  52 #include "hpsa_cmd.h"
  53 #include "hpsa.h"
  54
  55 /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
  56 #define HPSA_DRIVER_VERSION "2.0.2-1"
  57 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  58
  59 /* How long to wait (in milliseconds) for board to go into simple mode */
  60 #define MAX_CONFIG_WAIT 30000
  61 #define MAX_IOCTL_CONFIG_WAIT 1000
  62
  63 /*define how many times we will try a command because of bus resets */
  64 #define MAX_CMD_RETRIES 3
  65
  66 /* Embedded module documentation macros - see modules.h */
  67 MODULE_AUTHOR("Hewlett-Packard Company");
  68 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  69         HPSA_DRIVER_VERSION);
  70 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
  71 MODULE_VERSION(HPSA_DRIVER_VERSION);
  72 MODULE_LICENSE("GPL");
  73
  74 static int hpsa_allow_any;
  75 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
  76 MODULE_PARM_DESC(hpsa_allow_any,
  77                 "Allow hpsa driver to access unknown HP Smart Array hardware");
  78
  79 /* define the PCI info for the cards we can control */
  80 static const struct pci_device_id hpsa_pci_device_id[] = {
  81         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  82         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  83         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  84         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
  85         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
  86         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324a},
  87         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324b},
  88         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
  89 #define PCI_DEVICE_ID_HP_CISSF 0x333f
  90         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x333F},
  91         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,             PCI_ANY_ID, PCI_ANY_ID,
  92                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
  93         {0,}
  94 };
  95
  96 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
  97
  98 /*  board_id = Subsystem Device ID & Vendor ID
  99  *  product = Marketing Name for the board
 100  *  access = Address of the struct of function pointers
 101  */
 102 static struct board_type products[] = {
 103         {0x3241103C, "Smart Array P212", &SA5_access},
 104         {0x3243103C, "Smart Array P410", &SA5_access},
 105         {0x3245103C, "Smart Array P410i", &SA5_access},
 106         {0x3247103C, "Smart Array P411", &SA5_access},
 107         {0x3249103C, "Smart Array P812", &SA5_access},
 108         {0x324a103C, "Smart Array P712m", &SA5_access},
 109         {0x324b103C, "Smart Array P711m", &SA5_access},
 110         {0x3233103C, "StorageWorks P1210m", &SA5_access},
 111         {0x333F103C, "StorageWorks P1210m", &SA5_access},
 112         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 113 };
 114
 115 static int number_of_controllers;
 116
 117 static irqreturn_t do_hpsa_intr(int irq, void *dev_id);
 118 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
 119 static void start_io(struct ctlr_info *h);
 120
 121 #ifdef CONFIG_COMPAT
 122 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
 123 #endif
 124
 125 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 126 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
 127 static struct CommandList *cmd_alloc(struct ctlr_info *h);
 128 static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
 129 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 130         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
 131         int cmd_type);
 132
 133 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
 134                 void (*done)(struct scsi_cmnd *));
 135 static void hpsa_scan_start(struct Scsi_Host *);
 136 static int hpsa_scan_finished(struct Scsi_Host *sh,
 137         unsigned long elapsed_time);
 138 static int hpsa_change_queue_depth(struct scsi_device *sdev,
 139         int qdepth, int reason);
 140
 141 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 142 static int hpsa_slave_alloc(struct scsi_device *sdev);
 143 static void hpsa_slave_destroy(struct scsi_device *sdev);
 144
 145 static ssize_t raid_level_show(struct device *dev,
 146         struct device_attribute *attr, char *buf);
 147 static ssize_t lunid_show(struct device *dev,
 148         struct device_attribute *attr, char *buf);
 149 static ssize_t unique_id_show(struct device *dev,
 150         struct device_attribute *attr, char *buf);
 151 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
 152 static ssize_t host_store_rescan(struct device *dev,
 153          struct device_attribute *attr, const char *buf, size_t count);
 154 static int check_for_unit_attention(struct ctlr_info *h,
 155         struct CommandList *c);
 156 static void check_ioctl_unit_attention(struct ctlr_info *h,
 157         struct CommandList *c);
 158 /* performant mode helper functions */
 159 static void calc_bucket_map(int *bucket, int num_buckets,
 160         int nsgs, int *bucket_map);
 161 static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 162 static inline u32 next_command(struct ctlr_info *h);
 163
 164 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
 165 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
 166 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 167 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 168
 169 static struct device_attribute *hpsa_sdev_attrs[] = {
 170         &dev_attr_raid_level,
 171         &dev_attr_lunid,
 172         &dev_attr_unique_id,
 173         NULL,
 174 };
 175
 176 static struct device_attribute *hpsa_shost_attrs[] = {
 177         &dev_attr_rescan,
 178         NULL,
 179 };
 180
 181 static struct scsi_host_template hpsa_driver_template = {
 182         .module                 = THIS_MODULE,
 183         .name                   = "hpsa",
 184         .proc_name              = "hpsa",
 185         .queuecommand           = hpsa_scsi_queue_command,
 186         .scan_start             = hpsa_scan_start,
 187         .scan_finished          = hpsa_scan_finished,
 188         .change_queue_depth     = hpsa_change_queue_depth,
 189         .this_id                = -1,
 190         .use_clustering         = ENABLE_CLUSTERING,
 191         .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 192         .ioctl                  = hpsa_ioctl,
 193         .slave_alloc            = hpsa_slave_alloc,
 194         .slave_destroy          = hpsa_slave_destroy,
 195 #ifdef CONFIG_COMPAT
 196         .compat_ioctl           = hpsa_compat_ioctl,
 197 #endif
 198         .sdev_attrs = hpsa_sdev_attrs,
 199         .shost_attrs = hpsa_shost_attrs,
 200 };
 201
 202 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 203 {
 204         unsigned long *priv = shost_priv(sdev->host);
 205         return (struct ctlr_info *) *priv;
 206 }
 207
 208 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 209 {
 210         unsigned long *priv = shost_priv(sh);
 211         return (struct ctlr_info *) *priv;
 212 }
 213
 214 static int check_for_unit_attention(struct ctlr_info *h,
 215         struct CommandList *c)
 216 {
 217         if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
 218                 return 0;
 219
 220         switch (c->err_info->SenseInfo[12]) {
 221         case STATE_CHANGED:
 222                 dev_warn(&h->pdev->dev, "hpsa%d: a state change "
 223                         "detected, command retried\n", h->ctlr);
 224                 break;
 225         case LUN_FAILED:
 226                 dev_warn(&h->pdev->dev, "hpsa%d: LUN failure "
 227                         "detected, action required\n", h->ctlr);
 228                 break;
 229         case REPORT_LUNS_CHANGED:
 230                 dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
 231                         "changed, action required\n", h->ctlr);
 232         /*
 233          * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
 234          */
 235                 break;
 236         case POWER_OR_RESET:
 237                 dev_warn(&h->pdev->dev, "hpsa%d: a power on "
 238                         "or device reset detected\n", h->ctlr);
 239                 break;
 240         case UNIT_ATTENTION_CLEARED:
 241                 dev_warn(&h->pdev->dev, "hpsa%d: unit attention "
 242                     "cleared by another initiator\n", h->ctlr);
 243                 break;
 244         default:
 245                 dev_warn(&h->pdev->dev, "hpsa%d: unknown "
 246                         "unit attention detected\n", h->ctlr);
 247                 break;
 248         }
 249         return 1;
 250 }
 251
 252 static ssize_t host_store_rescan(struct device *dev,
 253                                  struct device_attribute *attr,
 254                                  const char *buf, size_t count)
 255 {
 256         struct ctlr_info *h;
 257         struct Scsi_Host *shost = class_to_shost(dev);
 258         h = shost_to_hba(shost);
 259         hpsa_scan_start(h->scsi_host);
 260         return count;
 261 }
 262
 263 /* Enqueuing and dequeuing functions for cmdlists. */
 264 static inline void addQ(struct hlist_head *list, struct CommandList *c)
 265 {
 266         hlist_add_head(&c->list, list);
 267 }
 268
 269 static inline u32 next_command(struct ctlr_info *h)
 270 {
 271         u32 a;
 272
 273         if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
 274                 return h->access.command_completed(h);
 275
 276         if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
 277                 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
 278                 (h->reply_pool_head)++;
 279                 h->commands_outstanding--;
 280         } else {
 281                 a = FIFO_EMPTY;
 282         }
 283         /* Check for wraparound */
 284         if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
 285                 h->reply_pool_head = h->reply_pool;
 286                 h->reply_pool_wraparound ^= 1;
 287         }
 288         return a;
 289 }
 290
 291 /* set_performant_mode: Modify the tag for cciss performant
 292  * set bit 0 for pull model, bits 3-1 for block fetch
 293  * register number
 294  */
 295 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
 296 {
 297         if (likely(h->transMethod == CFGTBL_Trans_Performant))
 298                 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
 299 }
 300
 301 static void enqueue_cmd_and_start_io(struct ctlr_info *h,
 302         struct CommandList *c)
 303 {
 304         unsigned long flags;
 305
 306         set_performant_mode(h, c);
 307         spin_lock_irqsave(&h->lock, flags);
 308         addQ(&h->reqQ, c);
 309         h->Qdepth++;
 310         start_io(h);
 311         spin_unlock_irqrestore(&h->lock, flags);
 312 }
 313
 314 static inline void removeQ(struct CommandList *c)
 315 {
 316         if (WARN_ON(hlist_unhashed(&c->list)))
 317                 return;
 318         hlist_del_init(&c->list);
 319 }
 320
 321 static inline int is_hba_lunid(unsigned char scsi3addr[])
 322 {
 323         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
 324 }
 325
 326 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 327 {
 328         return (scsi3addr[3] & 0xC0) == 0x40;
 329 }
 330
 331 static inline int is_scsi_rev_5(struct ctlr_info *h)
 332 {
 333         if (!h->hba_inquiry_data)
 334                 return 0;
 335         if ((h->hba_inquiry_data[2] & 0x07) == 5)
 336                 return 1;
 337         return 0;
 338 }
 339
 340 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 341         "UNKNOWN"
 342 };
 343 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
 344
 345 static ssize_t raid_level_show(struct device *dev,
 346              struct device_attribute *attr, char *buf)
 347 {
 348         ssize_t l = 0;
 349         unsigned char rlevel;
 350         struct ctlr_info *h;
 351         struct scsi_device *sdev;
 352         struct hpsa_scsi_dev_t *hdev;
 353         unsigned long flags;
 354
 355         sdev = to_scsi_device(dev);
 356         h = sdev_to_hba(sdev);
 357         spin_lock_irqsave(&h->lock, flags);
 358         hdev = sdev->hostdata;
 359         if (!hdev) {
 360                 spin_unlock_irqrestore(&h->lock, flags);
 361                 return -ENODEV;
 362         }
 363
 364         /* Is this even a logical drive? */
 365         if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
 366                 spin_unlock_irqrestore(&h->lock, flags);
 367                 l = snprintf(buf, PAGE_SIZE, "N/A\n");
 368                 return l;
 369         }
 370
 371         rlevel = hdev->raid_level;
 372         spin_unlock_irqrestore(&h->lock, flags);
 373         if (rlevel > RAID_UNKNOWN)
 374                 rlevel = RAID_UNKNOWN;
 375         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 376         return l;
 377 }
 378
 379 static ssize_t lunid_show(struct device *dev,
 380              struct device_attribute *attr, char *buf)
 381 {
 382         struct ctlr_info *h;
 383         struct scsi_device *sdev;
 384         struct hpsa_scsi_dev_t *hdev;
 385         unsigned long flags;
 386         unsigned char lunid[8];
 387
 388         sdev = to_scsi_device(dev);
 389         h = sdev_to_hba(sdev);
 390         spin_lock_irqsave(&h->lock, flags);
 391         hdev = sdev->hostdata;
 392         if (!hdev) {
 393                 spin_unlock_irqrestore(&h->lock, flags);
 394                 return -ENODEV;
 395         }
 396         memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 397         spin_unlock_irqrestore(&h->lock, flags);
 398         return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 399                 lunid[0], lunid[1], lunid[2], lunid[3],
 400                 lunid[4], lunid[5], lunid[6], lunid[7]);
 401 }
 402
 403 static ssize_t unique_id_show(struct device *dev,
 404              struct device_attribute *attr, char *buf)
 405 {
 406         struct ctlr_info *h;
 407         struct scsi_device *sdev;
 408         struct hpsa_scsi_dev_t *hdev;
 409         unsigned long flags;
 410         unsigned char sn[16];
 411
 412         sdev = to_scsi_device(dev);
 413         h = sdev_to_hba(sdev);
 414         spin_lock_irqsave(&h->lock, flags);
 415         hdev = sdev->hostdata;
 416         if (!hdev) {
 417                 spin_unlock_irqrestore(&h->lock, flags);
 418                 return -ENODEV;
 419         }
 420         memcpy(sn, hdev->device_id, sizeof(sn));
 421         spin_unlock_irqrestore(&h->lock, flags);
 422         return snprintf(buf, 16 * 2 + 2,
 423                         "%02X%02X%02X%02X%02X%02X%02X%02X"
 424                         "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 425                         sn[0], sn[1], sn[2], sn[3],
 426                         sn[4], sn[5], sn[6], sn[7],
 427                         sn[8], sn[9], sn[10], sn[11],
 428                         sn[12], sn[13], sn[14], sn[15]);
 429 }
 430
 431 static int hpsa_find_target_lun(struct ctlr_info *h,
 432         unsigned char scsi3addr[], int bus, int *target, int *lun)
 433 {
 434         /* finds an unused bus, target, lun for a new physical device
 435          * assumes h->devlock is held
 436          */
 437         int i, found = 0;
 438         DECLARE_BITMAP(lun_taken, HPSA_MAX_SCSI_DEVS_PER_HBA);
 439
 440         memset(&lun_taken[0], 0, HPSA_MAX_SCSI_DEVS_PER_HBA >> 3);
 441
 442         for (i = 0; i < h->ndevices; i++) {
 443                 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
 444                         set_bit(h->dev[i]->target, lun_taken);
 445         }
 446
 447         for (i = 0; i < HPSA_MAX_SCSI_DEVS_PER_HBA; i++) {
 448                 if (!test_bit(i, lun_taken)) {
 449                         /* *bus = 1; */
 450                         *target = i;
 451                         *lun = 0;
 452                         found = 1;
 453                         break;
 454                 }
 455         }
 456         return !found;
 457 }
 458
 459 /* Add an entry into h->dev[] array. */
 460 static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
 461                 struct hpsa_scsi_dev_t *device,
 462                 struct hpsa_scsi_dev_t *added[], int *nadded)
 463 {
 464         /* assumes h->devlock is held */
 465         int n = h->ndevices;
 466         int i;
 467         unsigned char addr1[8], addr2[8];
 468         struct hpsa_scsi_dev_t *sd;
 469
 470         if (n >= HPSA_MAX_SCSI_DEVS_PER_HBA) {
 471                 dev_err(&h->pdev->dev, "too many devices, some will be "
 472                         "inaccessible.\n");
 473                 return -1;
 474         }
 475
 476         /* physical devices do not have lun or target assigned until now. */
 477         if (device->lun != -1)
 478                 /* Logical device, lun is already assigned. */
 479                 goto lun_assigned;
 480
 481         /* If this device a non-zero lun of a multi-lun device
 482          * byte 4 of the 8-byte LUN addr will contain the logical
 483          * unit no, zero otherise.
 484          */
 485         if (device->scsi3addr[4] == 0) {
 486                 /* This is not a non-zero lun of a multi-lun device */
 487                 if (hpsa_find_target_lun(h, device->scsi3addr,
 488                         device->bus, &device->target, &device->lun) != 0)
 489                         return -1;
 490                 goto lun_assigned;
 491         }
 492
 493         /* This is a non-zero lun of a multi-lun device.
 494          * Search through our list and find the device which
 495          * has the same 8 byte LUN address, excepting byte 4.
 496          * Assign the same bus and target for this new LUN.
 497          * Use the logical unit number from the firmware.
 498          */
 499         memcpy(addr1, device->scsi3addr, 8);
 500         addr1[4] = 0;
 501         for (i = 0; i < n; i++) {
 502                 sd = h->dev[i];
 503                 memcpy(addr2, sd->scsi3addr, 8);
 504                 addr2[4] = 0;
 505                 /* differ only in byte 4? */
 506                 if (memcmp(addr1, addr2, 8) == 0) {
 507                         device->bus = sd->bus;
 508                         device->target = sd->target;
 509                         device->lun = device->scsi3addr[4];
 510                         break;
 511                 }
 512         }
 513         if (device->lun == -1) {
 514                 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
 515                         " suspect firmware bug or unsupported hardware "
 516                         "configuration.\n");
 517                         return -1;
 518         }
 519
 520 lun_assigned:
 521
 522         h->dev[n] = device;
 523         h->ndevices++;
 524         added[*nadded] = device;
 525         (*nadded)++;
 526
 527         /* initially, (before registering with scsi layer) we don't
 528          * know our hostno and we don't want to print anything first
 529          * time anyway (the scsi layer's inquiries will show that info)
 530          */
 531         /* if (hostno != -1) */
 532                 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
 533                         scsi_device_type(device->devtype), hostno,
 534                         device->bus, device->target, device->lun);
 535         return 0;
 536 }
 537
 538 /* Replace an entry from h->dev[] array. */
 539 static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
 540         int entry, struct hpsa_scsi_dev_t *new_entry,
 541         struct hpsa_scsi_dev_t *added[], int *nadded,
 542         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 543 {
 544         /* assumes h->devlock is held */
 545         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 546         removed[*nremoved] = h->dev[entry];
 547         (*nremoved)++;
 548         h->dev[entry] = new_entry;
 549         added[*nadded] = new_entry;
 550         (*nadded)++;
 551         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
 552                 scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
 553                         new_entry->target, new_entry->lun);
 554 }
 555
 556 /* Remove an entry from h->dev[] array. */
 557 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
 558         struct hpsa_scsi_dev_t *removed[], int *nremoved)
 559 {
 560         /* assumes h->devlock is held */
 561         int i;
 562         struct hpsa_scsi_dev_t *sd;
 563
 564         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
 565
 566         sd = h->dev[entry];
 567         removed[*nremoved] = h->dev[entry];
 568         (*nremoved)++;
 569
 570         for (i = entry; i < h->ndevices-1; i++)
 571                 h->dev[i] = h->dev[i+1];
 572         h->ndevices--;
 573         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
 574                 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
 575                 sd->lun);
 576 }
 577
 578 #define SCSI3ADDR_EQ(a, b) ( \
 579         (a)[7] == (b)[7] && \
 580         (a)[6] == (b)[6] && \
 581         (a)[5] == (b)[5] && \
 582         (a)[4] == (b)[4] && \
 583         (a)[3] == (b)[3] && \
 584         (a)[2] == (b)[2] && \
 585         (a)[1] == (b)[1] && \
 586         (a)[0] == (b)[0])
 587
 588 static void fixup_botched_add(struct ctlr_info *h,
 589         struct hpsa_scsi_dev_t *added)
 590 {
 591         /* called when scsi_add_device fails in order to re-adjust
 592          * h->dev[] to match the mid layer's view.
 593          */
 594         unsigned long flags;
 595         int i, j;
 596
 597         spin_lock_irqsave(&h->lock, flags);
 598         for (i = 0; i < h->ndevices; i++) {
 599                 if (h->dev[i] == added) {
 600                         for (j = i; j < h->ndevices-1; j++)
 601                                 h->dev[j] = h->dev[j+1];
 602                         h->ndevices--;
 603                         break;
 604                 }
 605         }
 606         spin_unlock_irqrestore(&h->lock, flags);
 607         kfree(added);
 608 }
 609
 610 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
 611         struct hpsa_scsi_dev_t *dev2)
 612 {
 613         if ((is_logical_dev_addr_mode(dev1->scsi3addr) ||
 614                 (dev1->lun != -1 && dev2->lun != -1)) &&
 615                 dev1->devtype != 0x0C)
 616                 return (memcmp(dev1, dev2, sizeof(*dev1)) == 0);
 617
 618         /* we compare everything except lun and target as these
 619          * are not yet assigned.  Compare parts likely
 620          * to differ first
 621          */
 622         if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
 623                 sizeof(dev1->scsi3addr)) != 0)
 624                 return 0;
 625         if (memcmp(dev1->device_id, dev2->device_id,
 626                 sizeof(dev1->device_id)) != 0)
 627                 return 0;
 628         if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
 629                 return 0;
 630         if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
 631                 return 0;
 632         if (memcmp(dev1->revision, dev2->revision, sizeof(dev1->revision)) != 0)
 633                 return 0;
 634         if (dev1->devtype != dev2->devtype)
 635                 return 0;
 636         if (dev1->raid_level != dev2->raid_level)
 637                 return 0;
 638         if (dev1->bus != dev2->bus)
 639                 return 0;
 640         return 1;
 641 }
 642
 643 /* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 644  * and return needle location in *index.  If scsi3addr matches, but not
 645  * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
 646  * location in *index.  If needle not found, return DEVICE_NOT_FOUND.
 647  */
 648 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
 649         struct hpsa_scsi_dev_t *haystack[], int haystack_size,
 650         int *index)
 651 {
 652         int i;
 653 #define DEVICE_NOT_FOUND 0
 654 #define DEVICE_CHANGED 1
 655 #define DEVICE_SAME 2
 656         for (i = 0; i < haystack_size; i++) {
 657                 if (haystack[i] == NULL) /* previously removed. */
 658                         continue;
 659                 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
 660                         *index = i;
 661                         if (device_is_the_same(needle, haystack[i]))
 662                                 return DEVICE_SAME;
 663                         else
 664                                 return DEVICE_CHANGED;
 665                 }
 666         }
 667         *index = -1;
 668         return DEVICE_NOT_FOUND;
 669 }
 670
 671 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
 672         struct hpsa_scsi_dev_t *sd[], int nsds)
 673 {
 674         /* sd contains scsi3 addresses and devtypes, and inquiry
 675          * data.  This function takes what's in sd to be the current
 676          * reality and updates h->dev[] to reflect that reality.
 677          */
 678         int i, entry, device_change, changes = 0;
 679         struct hpsa_scsi_dev_t *csd;
 680         unsigned long flags;
 681         struct hpsa_scsi_dev_t **added, **removed;
 682         int nadded, nremoved;
 683         struct Scsi_Host *sh = NULL;
 684
 685         added = kzalloc(sizeof(*added) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 686                 GFP_KERNEL);
 687         removed = kzalloc(sizeof(*removed) * HPSA_MAX_SCSI_DEVS_PER_HBA,
 688                 GFP_KERNEL);
 689
 690         if (!added || !removed) {
 691                 dev_warn(&h->pdev->dev, "out of memory in "
 692                         "adjust_hpsa_scsi_table\n");
 693                 goto free_and_out;
 694         }
 695
 696         spin_lock_irqsave(&h->devlock, flags);
 697
 698         /* find any devices in h->dev[] that are not in
 699          * sd[] and remove them from h->dev[], and for any
 700          * devices which have changed, remove the old device
 701          * info and add the new device info.
 702          */
 703         i = 0;
 704         nremoved = 0;
 705         nadded = 0;
 706         while (i < h->ndevices) {
 707                 csd = h->dev[i];
 708                 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
 709                 if (device_change == DEVICE_NOT_FOUND) {
 710                         changes++;
 711                         hpsa_scsi_remove_entry(h, hostno, i,
 712                                 removed, &nremoved);
 713                         continue; /* remove ^^^, hence i not incremented */
 714                 } else if (device_change == DEVICE_CHANGED) {
 715                         changes++;
 716                         hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
 717                                 added, &nadded, removed, &nremoved);
 718                         /* Set it to NULL to prevent it from being freed
 719                          * at the bottom of hpsa_update_scsi_devices()
 720                          */
 721                         sd[entry] = NULL;
 722                 }
 723                 i++;
 724         }
 725
 726         /* Now, make sure every device listed in sd[] is also
 727          * listed in h->dev[], adding them if they aren't found
 728          */
 729
 730         for (i = 0; i < nsds; i++) {
 731                 if (!sd[i]) /* if already added above. */
 732                         continue;
 733                 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
 734                                         h->ndevices, &entry);
 735                 if (device_change == DEVICE_NOT_FOUND) {
 736                         changes++;
 737                         if (hpsa_scsi_add_entry(h, hostno, sd[i],
 738                                 added, &nadded) != 0)
 739                                 break;
 740                         sd[i] = NULL; /* prevent from being freed later. */
 741                 } else if (device_change == DEVICE_CHANGED) {
 742                         /* should never happen... */
 743                         changes++;
 744                         dev_warn(&h->pdev->dev,
 745                                 "device unexpectedly changed.\n");
 746                         /* but if it does happen, we just ignore that device */
 747                 }
 748         }
 749         spin_unlock_irqrestore(&h->devlock, flags);
 750
 751         /* Don't notify scsi mid layer of any changes the first time through
 752          * (or if there are no changes) scsi_scan_host will do it later the
 753          * first time through.
 754          */
 755         if (hostno == -1 || !changes)
 756                 goto free_and_out;
 757
 758         sh = h->scsi_host;
 759         /* Notify scsi mid layer of any removed devices */
 760         for (i = 0; i < nremoved; i++) {
 761                 struct scsi_device *sdev =
 762                         scsi_device_lookup(sh, removed[i]->bus,
 763                                 removed[i]->target, removed[i]->lun);
 764                 if (sdev != NULL) {
 765                         scsi_remove_device(sdev);
 766                         scsi_device_put(sdev);
 767                 } else {
 768                         /* We don't expect to get here.
 769                          * future cmds to this device will get selection
 770                          * timeout as if the device was gone.
 771                          */
 772                         dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
 773                                 " for removal.", hostno, removed[i]->bus,
 774                                 removed[i]->target, removed[i]->lun);
 775                 }
 776                 kfree(removed[i]);
 777                 removed[i] = NULL;
 778         }
 779
 780         /* Notify scsi mid layer of any added devices */
 781         for (i = 0; i < nadded; i++) {
 782                 if (scsi_add_device(sh, added[i]->bus,
 783                         added[i]->target, added[i]->lun) == 0)
 784                         continue;
 785                 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
 786                         "device not added.\n", hostno, added[i]->bus,
 787                         added[i]->target, added[i]->lun);
 788                 /* now we have to remove it from h->dev,
 789                  * since it didn't get added to scsi mid layer
 790                  */
 791                 fixup_botched_add(h, added[i]);
 792         }
 793
 794 free_and_out:
 795         kfree(added);
 796         kfree(removed);
 797 }
 798
 799 /*
 800  * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
 801  * Assume's h->devlock is held.
 802  */
 803 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
 804         int bus, int target, int lun)
 805 {
 806         int i;
 807         struct hpsa_scsi_dev_t *sd;
 808
 809         for (i = 0; i < h->ndevices; i++) {
 810                 sd = h->dev[i];
 811                 if (sd->bus == bus && sd->target == target && sd->lun == lun)
 812                         return sd;
 813         }
 814         return NULL;
 815 }
 816
 817 /* link sdev->hostdata to our per-device structure. */
 818 static int hpsa_slave_alloc(struct scsi_device *sdev)
 819 {
 820         struct hpsa_scsi_dev_t *sd;
 821         unsigned long flags;
 822         struct ctlr_info *h;
 823
 824         h = sdev_to_hba(sdev);
 825         spin_lock_irqsave(&h->devlock, flags);
 826         sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
 827                 sdev_id(sdev), sdev->lun);
 828         if (sd != NULL)
 829                 sdev->hostdata = sd;
 830         spin_unlock_irqrestore(&h->devlock, flags);
 831         return 0;
 832 }
 833
 834 static void hpsa_slave_destroy(struct scsi_device *sdev)
 835 {
 836         /* nothing to do. */
 837 }
 838
 839 static void hpsa_scsi_setup(struct ctlr_info *h)
 840 {
 841         h->ndevices = 0;
 842         h->scsi_host = NULL;
 843         spin_lock_init(&h->devlock);
 844 }
 845
 846 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
 847 {
 848         int i;
 849
 850         if (!h->cmd_sg_list)
 851                 return;
 852         for (i = 0; i < h->nr_cmds; i++) {
 853                 kfree(h->cmd_sg_list[i]);
 854                 h->cmd_sg_list[i] = NULL;
 855         }
 856         kfree(h->cmd_sg_list);
 857         h->cmd_sg_list = NULL;
 858 }
 859
 860 static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
 861 {
 862         int i;
 863
 864         if (h->chainsize <= 0)
 865                 return 0;
 866
 867         h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
 868                                 GFP_KERNEL);
 869         if (!h->cmd_sg_list)
 870                 return -ENOMEM;
 871         for (i = 0; i < h->nr_cmds; i++) {
 872                 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
 873                                                 h->chainsize, GFP_KERNEL);
 874                 if (!h->cmd_sg_list[i])
 875                         goto clean;
 876         }
 877         return 0;
 878
 879 clean:
 880         hpsa_free_sg_chain_blocks(h);
 881         return -ENOMEM;
 882 }
 883
 884 static void hpsa_map_sg_chain_block(struct ctlr_info *h,
 885         struct CommandList *c)
 886 {
 887         struct SGDescriptor *chain_sg, *chain_block;
 888         u64 temp64;
 889
 890         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
 891         chain_block = h->cmd_sg_list[c->cmdindex];
 892         chain_sg->Ext = HPSA_SG_CHAIN;
 893         chain_sg->Len = sizeof(*chain_sg) *
 894                 (c->Header.SGTotal - h->max_cmd_sg_entries);
 895         temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
 896                                 PCI_DMA_TODEVICE);
 897         chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
 898         chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
 899 }
 900
 901 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
 902         struct CommandList *c)
 903 {
 904         struct SGDescriptor *chain_sg;
 905         union u64bit temp64;
 906
 907         if (c->Header.SGTotal <= h->max_cmd_sg_entries)
 908                 return;
 909
 910         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
 911         temp64.val32.lower = chain_sg->Addr.lower;
 912         temp64.val32.upper = chain_sg->Addr.upper;
 913         pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
 914 }
 915
 916 static void complete_scsi_command(struct CommandList *cp,
 917         int timeout, u32 tag)
 918 {
 919         struct scsi_cmnd *cmd;
 920         struct ctlr_info *h;
 921         struct ErrorInfo *ei;
 922
 923         unsigned char sense_key;
 924         unsigned char asc;      /* additional sense code */
 925         unsigned char ascq;     /* additional sense code qualifier */
 926
 927         ei = cp->err_info;
 928         cmd = (struct scsi_cmnd *) cp->scsi_cmd;
 929         h = cp->h;
 930
 931         scsi_dma_unmap(cmd); /* undo the DMA mappings */
 932         if (cp->Header.SGTotal > h->max_cmd_sg_entries)
 933                 hpsa_unmap_sg_chain_block(h, cp);
 934
 935         cmd->result = (DID_OK << 16);           /* host byte */
 936         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
 937         cmd->result |= ei->ScsiStatus;
 938
 939         /* copy the sense data whether we need to or not. */
 940         memcpy(cmd->sense_buffer, ei->SenseInfo,
 941                 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
 942                         SCSI_SENSE_BUFFERSIZE :
 943                         ei->SenseLen);
 944         scsi_set_resid(cmd, ei->ResidualCnt);
 945
 946         if (ei->CommandStatus == 0) {
 947                 cmd->scsi_done(cmd);
 948                 cmd_free(h, cp);
 949                 return;
 950         }
 951
 952         /* an error has occurred */
 953         switch (ei->CommandStatus) {
 954
 955         case CMD_TARGET_STATUS:
 956                 if (ei->ScsiStatus) {
 957                         /* Get sense key */
 958                         sense_key = 0xf & ei->SenseInfo[2];
 959                         /* Get additional sense code */
 960                         asc = ei->SenseInfo[12];
 961                         /* Get addition sense code qualifier */
 962                         ascq = ei->SenseInfo[13];
 963                 }
 964
 965                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
 966                         if (check_for_unit_attention(h, cp)) {
 967                                 cmd->result = DID_SOFT_ERROR << 16;
 968                                 break;
 969                         }
 970                         if (sense_key == ILLEGAL_REQUEST) {
 971                                 /*
 972                                  * SCSI REPORT_LUNS is commonly unsupported on
 973                                  * Smart Array.  Suppress noisy complaint.
 974                                  */
 975                                 if (cp->Request.CDB[0] == REPORT_LUNS)
 976                                         break;
 977
 978                                 /* If ASC/ASCQ indicate Logical Unit
 979                                  * Not Supported condition,
 980                                  */
 981                                 if ((asc == 0x25) && (ascq == 0x0)) {
 982                                         dev_warn(&h->pdev->dev, "cp %p "
 983                                                 "has check condition\n", cp);
 984                                         break;
 985                                 }
 986                         }
 987
 988                         if (sense_key == NOT_READY) {
 989                                 /* If Sense is Not Ready, Logical Unit
 990                                  * Not ready, Manual Intervention
 991                                  * required
 992                                  */
 993                                 if ((asc == 0x04) && (ascq == 0x03)) {
 994                                         dev_warn(&h->pdev->dev, "cp %p "
 995                                                 "has check condition: unit "
 996                                                 "not ready, manual "
 997                                                 "intervention required\n", cp);
 998                                         break;
 999                                 }
1000                         }
1001                         if (sense_key == ABORTED_COMMAND) {
1002                                 /* Aborted command is retryable */
1003                                 dev_warn(&h->pdev->dev, "cp %p "
1004                                         "has check condition: aborted command: "
1005                                         "ASC: 0x%x, ASCQ: 0x%x\n",
1006                                         cp, asc, ascq);
1007                                 cmd->result = DID_SOFT_ERROR << 16;
1008                                 break;
1009                         }
1010                         /* Must be some other type of check condition */
1011                         dev_warn(&h->pdev->dev, "cp %p has check condition: "
1012                                         "unknown type: "
1013                                         "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1014                                         "Returning result: 0x%x, "
1015                                         "cmd=[%02x %02x %02x %02x %02x "
1016                                         "%02x %02x %02x %02x %02x %02x "
1017                                         "%02x %02x %02x %02x %02x]\n",
1018                                         cp, sense_key, asc, ascq,
1019                                         cmd->result,
1020                                         cmd->cmnd[0], cmd->cmnd[1],
1021                                         cmd->cmnd[2], cmd->cmnd[3],
1022                                         cmd->cmnd[4], cmd->cmnd[5],
1023                                         cmd->cmnd[6], cmd->cmnd[7],
1024                                         cmd->cmnd[8], cmd->cmnd[9],
1025                                         cmd->cmnd[10], cmd->cmnd[11],
1026                                         cmd->cmnd[12], cmd->cmnd[13],
1027                                         cmd->cmnd[14], cmd->cmnd[15]);
1028                         break;
1029                 }
1030
1031
1032                 /* Problem was not a check condition
1033                  * Pass it up to the upper layers...
1034                  */
1035                 if (ei->ScsiStatus) {
1036                         dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1037                                 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1038                                 "Returning result: 0x%x\n",
1039                                 cp, ei->ScsiStatus,
1040                                 sense_key, asc, ascq,
1041                                 cmd->result);
1042                 } else {  /* scsi status is zero??? How??? */
1043                         dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1044                                 "Returning no connection.\n", cp),
1045
1046                         /* Ordinarily, this case should never happen,
1047                          * but there is a bug in some released firmware
1048                          * revisions that allows it to happen if, for
1049                          * example, a 4100 backplane loses power and
1050                          * the tape drive is in it.  We assume that
1051                          * it's a fatal error of some kind because we
1052                          * can't show that it wasn't. We will make it
1053                          * look like selection timeout since that is
1054                          * the most common reason for this to occur,
1055                          * and it's severe enough.
1056                          */
1057
1058                         cmd->result = DID_NO_CONNECT << 16;
1059                 }
1060                 break;
1061
1062         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1063                 break;
1064         case CMD_DATA_OVERRUN:
1065                 dev_warn(&h->pdev->dev, "cp %p has"
1066                         " completed with data overrun "
1067                         "reported\n", cp);
1068                 break;
1069         case CMD_INVALID: {
1070                 /* print_bytes(cp, sizeof(*cp), 1, 0);
1071                 print_cmd(cp); */
1072                 /* We get CMD_INVALID if you address a non-existent device
1073                  * instead of a selection timeout (no response).  You will
1074                  * see this if you yank out a drive, then try to access it.
1075                  * This is kind of a shame because it means that any other
1076                  * CMD_INVALID (e.g. driver bug) will get interpreted as a
1077                  * missing target. */
1078                 cmd->result = DID_NO_CONNECT << 16;
1079         }
1080                 break;
1081         case CMD_PROTOCOL_ERR:
1082                 dev_warn(&h->pdev->dev, "cp %p has "
1083                         "protocol error \n", cp);
1084                 break;
1085         case CMD_HARDWARE_ERR:
1086                 cmd->result = DID_ERROR << 16;
1087                 dev_warn(&h->pdev->dev, "cp %p had  hardware error\n", cp);
1088                 break;
1089         case CMD_CONNECTION_LOST:
1090                 cmd->result = DID_ERROR << 16;
1091                 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1092                 break;
1093         case CMD_ABORTED:
1094                 cmd->result = DID_ABORT << 16;
1095                 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1096                                 cp, ei->ScsiStatus);
1097                 break;
1098         case CMD_ABORT_FAILED:
1099                 cmd->result = DID_ERROR << 16;
1100                 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1101                 break;
1102         case CMD_UNSOLICITED_ABORT:
1103                 cmd->result = DID_RESET << 16;
1104                 dev_warn(&h->pdev->dev, "cp %p aborted do to an unsolicited "
1105                         "abort\n", cp);
1106                 break;
1107         case CMD_TIMEOUT:
1108                 cmd->result = DID_TIME_OUT << 16;
1109                 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1110                 break;
1111         default:
1112                 cmd->result = DID_ERROR << 16;
1113                 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1114                                 cp, ei->CommandStatus);
1115         }
1116         cmd->scsi_done(cmd);
1117         cmd_free(h, cp);
1118 }
1119
1120 static int hpsa_scsi_detect(struct ctlr_info *h)
1121 {
1122         struct Scsi_Host *sh;
1123         int error;
1124
1125         sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
1126         if (sh == NULL)
1127                 goto fail;
1128
1129         sh->io_port = 0;
1130         sh->n_io_port = 0;
1131         sh->this_id = -1;
1132         sh->max_channel = 3;
1133         sh->max_cmd_len = MAX_COMMAND_SIZE;
1134         sh->max_lun = HPSA_MAX_LUN;
1135         sh->max_id = HPSA_MAX_LUN;
1136         sh->can_queue = h->nr_cmds;
1137         sh->cmd_per_lun = h->nr_cmds;
1138         sh->sg_tablesize = h->maxsgentries;
1139         h->scsi_host = sh;
1140         sh->hostdata[0] = (unsigned long) h;
1141         sh->irq = h->intr[PERF_MODE_INT];
1142         sh->unique_id = sh->irq;
1143         error = scsi_add_host(sh, &h->pdev->dev);
1144         if (error)
1145                 goto fail_host_put;
1146         scsi_scan_host(sh);
1147         return 0;
1148
1149  fail_host_put:
1150         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_add_host"
1151                 " failed for controller %d\n", h->ctlr);
1152         scsi_host_put(sh);
1153         return error;
1154  fail:
1155         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc"
1156                 " failed for controller %d\n", h->ctlr);
1157         return -ENOMEM;
1158 }
1159
1160 static void hpsa_pci_unmap(struct pci_dev *pdev,
1161         struct CommandList *c, int sg_used, int data_direction)
1162 {
1163         int i;
1164         union u64bit addr64;
1165
1166         for (i = 0; i < sg_used; i++) {
1167                 addr64.val32.lower = c->SG[i].Addr.lower;
1168                 addr64.val32.upper = c->SG[i].Addr.upper;
1169                 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1170                         data_direction);
1171         }
1172 }
1173
1174 static void hpsa_map_one(struct pci_dev *pdev,
1175                 struct CommandList *cp,
1176                 unsigned char *buf,
1177                 size_t buflen,
1178                 int data_direction)
1179 {
1180         u64 addr64;
1181
1182         if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1183                 cp->Header.SGList = 0;
1184                 cp->Header.SGTotal = 0;
1185                 return;
1186         }
1187
1188         addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1189         cp->SG[0].Addr.lower =
1190           (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1191         cp->SG[0].Addr.upper =
1192           (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1193         cp->SG[0].Len = buflen;
1194         cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
1195         cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1196 }
1197
1198 static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1199         struct CommandList *c)
1200 {
1201         DECLARE_COMPLETION_ONSTACK(wait);
1202
1203         c->waiting = &wait;
1204         enqueue_cmd_and_start_io(h, c);
1205         wait_for_completion(&wait);
1206 }
1207
1208 static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1209         struct CommandList *c, int data_direction)
1210 {
1211         int retry_count = 0;
1212
1213         do {
1214                 memset(c->err_info, 0, sizeof(c->err_info));
1215                 hpsa_scsi_do_simple_cmd_core(h, c);
1216                 retry_count++;
1217         } while (check_for_unit_attention(h, c) && retry_count <= 3);
1218         hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1219 }
1220
1221 static void hpsa_scsi_interpret_error(struct CommandList *cp)
1222 {
1223         struct ErrorInfo *ei;
1224         struct device *d = &cp->h->pdev->dev;
1225
1226         ei = cp->err_info;
1227         switch (ei->CommandStatus) {
1228         case CMD_TARGET_STATUS:
1229                 dev_warn(d, "cmd %p has completed with errors\n", cp);
1230                 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1231                                 ei->ScsiStatus);
1232                 if (ei->ScsiStatus == 0)
1233                         dev_warn(d, "SCSI status is abnormally zero.  "
1234                         "(probably indicates selection timeout "
1235                         "reported incorrectly due to a known "
1236                         "firmware bug, circa July, 2001.)\n");
1237                 break;
1238         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1239                         dev_info(d, "UNDERRUN\n");
1240                 break;
1241         case CMD_DATA_OVERRUN:
1242                 dev_warn(d, "cp %p has completed with data overrun\n", cp);
1243                 break;
1244         case CMD_INVALID: {
1245                 /* controller unfortunately reports SCSI passthru's
1246                  * to non-existent targets as invalid commands.
1247                  */
1248                 dev_warn(d, "cp %p is reported invalid (probably means "
1249                         "target device no longer present)\n", cp);
1250                 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1251                 print_cmd(cp);  */
1252                 }
1253                 break;
1254         case CMD_PROTOCOL_ERR:
1255                 dev_warn(d, "cp %p has protocol error \n", cp);
1256                 break;
1257         case CMD_HARDWARE_ERR:
1258                 /* cmd->result = DID_ERROR << 16; */
1259                 dev_warn(d, "cp %p had hardware error\n", cp);
1260                 break;
1261         case CMD_CONNECTION_LOST:
1262                 dev_warn(d, "cp %p had connection lost\n", cp);
1263                 break;
1264         case CMD_ABORTED:
1265                 dev_warn(d, "cp %p was aborted\n", cp);
1266                 break;
1267         case CMD_ABORT_FAILED:
1268                 dev_warn(d, "cp %p reports abort failed\n", cp);
1269                 break;
1270         case CMD_UNSOLICITED_ABORT:
1271                 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1272                 break;
1273         case CMD_TIMEOUT:
1274                 dev_warn(d, "cp %p timed out\n", cp);
1275                 break;
1276         default:
1277                 dev_warn(d, "cp %p returned unknown status %x\n", cp,
1278                                 ei->CommandStatus);
1279         }
1280 }
1281
1282 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1283                         unsigned char page, unsigned char *buf,
1284                         unsigned char bufsize)
1285 {
1286         int rc = IO_OK;
1287         struct CommandList *c;
1288         struct ErrorInfo *ei;
1289
1290         c = cmd_special_alloc(h);
1291
1292         if (c == NULL) {                        /* trouble... */
1293                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1294                 return -ENOMEM;
1295         }
1296
1297         fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
1298         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1299         ei = c->err_info;
1300         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1301                 hpsa_scsi_interpret_error(c);
1302                 rc = -1;
1303         }
1304         cmd_special_free(h, c);
1305         return rc;
1306 }
1307
1308 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1309 {
1310         int rc = IO_OK;
1311         struct CommandList *c;
1312         struct ErrorInfo *ei;
1313
1314         c = cmd_special_alloc(h);
1315
1316         if (c == NULL) {                        /* trouble... */
1317                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1318                 return -ENOMEM;
1319         }
1320
1321         fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
1322         hpsa_scsi_do_simple_cmd_core(h, c);
1323         /* no unmap needed here because no data xfer. */
1324
1325         ei = c->err_info;
1326         if (ei->CommandStatus != 0) {
1327                 hpsa_scsi_interpret_error(c);
1328                 rc = -1;
1329         }
1330         cmd_special_free(h, c);
1331         return rc;
1332 }
1333
1334 static void hpsa_get_raid_level(struct ctlr_info *h,
1335         unsigned char *scsi3addr, unsigned char *raid_level)
1336 {
1337         int rc;
1338         unsigned char *buf;
1339
1340         *raid_level = RAID_UNKNOWN;
1341         buf = kzalloc(64, GFP_KERNEL);
1342         if (!buf)
1343                 return;
1344         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1345         if (rc == 0)
1346                 *raid_level = buf[8];
1347         if (*raid_level > RAID_UNKNOWN)
1348                 *raid_level = RAID_UNKNOWN;
1349         kfree(buf);
1350         return;
1351 }
1352
1353 /* Get the device id from inquiry page 0x83 */
1354 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1355         unsigned char *device_id, int buflen)
1356 {
1357         int rc;
1358         unsigned char *buf;
1359
1360         if (buflen > 16)
1361                 buflen = 16;
1362         buf = kzalloc(64, GFP_KERNEL);
1363         if (!buf)
1364                 return -1;
1365         rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1366         if (rc == 0)
1367                 memcpy(device_id, &buf[8], buflen);
1368         kfree(buf);
1369         return rc != 0;
1370 }
1371
1372 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1373                 struct ReportLUNdata *buf, int bufsize,
1374                 int extended_response)
1375 {
1376         int rc = IO_OK;
1377         struct CommandList *c;
1378         unsigned char scsi3addr[8];
1379         struct ErrorInfo *ei;
1380
1381         c = cmd_special_alloc(h);
1382         if (c == NULL) {                        /* trouble... */
1383                 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1384                 return -1;
1385         }
1386         /* address the controller */
1387         memset(scsi3addr, 0, sizeof(scsi3addr));
1388         fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1389                 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1390         if (extended_response)
1391                 c->Request.CDB[1] = extended_response;
1392         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1393         ei = c->err_info;
1394         if (ei->CommandStatus != 0 &&
1395             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1396                 hpsa_scsi_interpret_error(c);
1397                 rc = -1;
1398         }
1399         cmd_special_free(h, c);
1400         return rc;
1401 }
1402
1403 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1404                 struct ReportLUNdata *buf,
1405                 int bufsize, int extended_response)
1406 {
1407         return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1408 }
1409
1410 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1411                 struct ReportLUNdata *buf, int bufsize)
1412 {
1413         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1414 }
1415
1416 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1417         int bus, int target, int lun)
1418 {
1419         device->bus = bus;
1420         device->target = target;
1421         device->lun = lun;
1422 }
1423
1424 static int hpsa_update_device_info(struct ctlr_info *h,
1425         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device)
1426 {
1427 #define OBDR_TAPE_INQ_SIZE 49
1428         unsigned char *inq_buff;
1429
1430         inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1431         if (!inq_buff)
1432                 goto bail_out;
1433
1434         /* Do an inquiry to the device to see what it is. */
1435         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1436                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1437                 /* Inquiry failed (msg printed already) */
1438                 dev_err(&h->pdev->dev,
1439                         "hpsa_update_device_info: inquiry failed\n");
1440                 goto bail_out;
1441         }
1442
1443         /* As a side effect, record the firmware version number
1444          * if we happen to be talking to the RAID controller.
1445          */
1446         if (is_hba_lunid(scsi3addr))
1447                 memcpy(h->firm_ver, &inq_buff[32], 4);
1448
1449         this_device->devtype = (inq_buff[0] & 0x1f);
1450         memcpy(this_device->scsi3addr, scsi3addr, 8);
1451         memcpy(this_device->vendor, &inq_buff[8],
1452                 sizeof(this_device->vendor));
1453         memcpy(this_device->model, &inq_buff[16],
1454                 sizeof(this_device->model));
1455         memcpy(this_device->revision, &inq_buff[32],
1456                 sizeof(this_device->revision));
1457         memset(this_device->device_id, 0,
1458                 sizeof(this_device->device_id));
1459         hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1460                 sizeof(this_device->device_id));
1461
1462         if (this_device->devtype == TYPE_DISK &&
1463                 is_logical_dev_addr_mode(scsi3addr))
1464                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1465         else
1466                 this_device->raid_level = RAID_UNKNOWN;
1467
1468         kfree(inq_buff);
1469         return 0;
1470
1471 bail_out:
1472         kfree(inq_buff);
1473         return 1;
1474 }
1475
1476 static unsigned char *msa2xxx_model[] = {
1477         "MSA2012",
1478         "MSA2024",
1479         "MSA2312",
1480         "MSA2324",
1481         NULL,
1482 };
1483
1484 static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1485 {
1486         int i;
1487
1488         for (i = 0; msa2xxx_model[i]; i++)
1489                 if (strncmp(device->model, msa2xxx_model[i],
1490                         strlen(msa2xxx_model[i])) == 0)
1491                         return 1;
1492         return 0;
1493 }
1494
1495 /* Helper function to assign bus, target, lun mapping of devices.
1496  * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical
1497  * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1498  * Logical drive target and lun are assigned at this time, but
1499  * physical device lun and target assignment are deferred (assigned
1500  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1501  */
1502 static void figure_bus_target_lun(struct ctlr_info *h,
1503         u8 *lunaddrbytes, int *bus, int *target, int *lun,
1504         struct hpsa_scsi_dev_t *device)
1505 {
1506         u32 lunid;
1507
1508         if (is_logical_dev_addr_mode(lunaddrbytes)) {
1509                 /* logical device */
1510                 if (unlikely(is_scsi_rev_5(h))) {
1511                         /* p1210m, logical drives lun assignments
1512                          * match SCSI REPORT LUNS data.
1513                          */
1514                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1515                         *bus = 0;
1516                         *target = 0;
1517                         *lun = (lunid & 0x3fff) + 1;
1518                 } else {
1519                         /* not p1210m... */
1520                         lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1521                         if (is_msa2xxx(h, device)) {
1522                                 /* msa2xxx way, put logicals on bus 1
1523                                  * and match target/lun numbers box
1524                                  * reports.
1525                                  */
1526                                 *bus = 1;
1527                                 *target = (lunid >> 16) & 0x3fff;
1528                                 *lun = lunid & 0x00ff;
1529                         } else {
1530                                 /* Traditional smart array way. */
1531                                 *bus = 0;
1532                                 *lun = 0;
1533                                 *target = lunid & 0x3fff;
1534                         }
1535                 }
1536         } else {
1537                 /* physical device */
1538                 if (is_hba_lunid(lunaddrbytes))
1539                         if (unlikely(is_scsi_rev_5(h))) {
1540                                 *bus = 0; /* put p1210m ctlr at 0,0,0 */
1541                                 *target = 0;
1542                                 *lun = 0;
1543                                 return;
1544                         } else
1545                                 *bus = 3; /* traditional smartarray */
1546                 else
1547                         *bus = 2; /* physical disk */
1548                 *target = -1;
1549                 *lun = -1; /* we will fill these in later. */
1550         }
1551 }
1552
1553 /*
1554  * If there is no lun 0 on a target, linux won't find any devices.
1555  * For the MSA2xxx boxes, we have to manually detect the enclosure
1556  * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1557  * it for some reason.  *tmpdevice is the target we're adding,
1558  * this_device is a pointer into the current element of currentsd[]
1559  * that we're building up in update_scsi_devices(), below.
1560  * lunzerobits is a bitmap that tracks which targets already have a
1561  * lun 0 assigned.
1562  * Returns 1 if an enclosure was added, 0 if not.
1563  */
1564 static int add_msa2xxx_enclosure_device(struct ctlr_info *h,
1565         struct hpsa_scsi_dev_t *tmpdevice,
1566         struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1567         int bus, int target, int lun, unsigned long lunzerobits[],
1568         int *nmsa2xxx_enclosures)
1569 {
1570         unsigned char scsi3addr[8];
1571
1572         if (test_bit(target, lunzerobits))
1573                 return 0; /* There is already a lun 0 on this target. */
1574
1575         if (!is_logical_dev_addr_mode(lunaddrbytes))
1576                 return 0; /* It's the logical targets that may lack lun 0. */
1577
1578         if (!is_msa2xxx(h, tmpdevice))
1579                 return 0; /* It's only the MSA2xxx that have this problem. */
1580
1581         if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */
1582                 return 0;
1583
1584         if (is_hba_lunid(scsi3addr))
1585                 return 0; /* Don't add the RAID controller here. */
1586
1587         if (is_scsi_rev_5(h))
1588                 return 0; /* p1210m doesn't need to do this. */
1589
1590 #define MAX_MSA2XXX_ENCLOSURES 32
1591         if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) {
1592                 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX "
1593                         "enclosures exceeded.  Check your hardware "
1594                         "configuration.");
1595                 return 0;
1596         }
1597
1598         memset(scsi3addr, 0, 8);
1599         scsi3addr[3] = target;
1600         if (hpsa_update_device_info(h, scsi3addr, this_device))
1601                 return 0;
1602         (*nmsa2xxx_enclosures)++;
1603         hpsa_set_bus_target_lun(this_device, bus, target, 0);
1604         set_bit(target, lunzerobits);
1605         return 1;
1606 }
1607
1608 /*
1609  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
1610  * logdev.  The number of luns in physdev and logdev are returned in
1611  * *nphysicals and *nlogicals, respectively.
1612  * Returns 0 on success, -1 otherwise.
1613  */
1614 static int hpsa_gather_lun_info(struct ctlr_info *h,
1615         int reportlunsize,
1616         struct ReportLUNdata *physdev, u32 *nphysicals,
1617         struct ReportLUNdata *logdev, u32 *nlogicals)
1618 {
1619         if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1620                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1621                 return -1;
1622         }
1623         *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1624         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1625                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1626                         "  %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1627                         *nphysicals - HPSA_MAX_PHYS_LUN);
1628                 *nphysicals = HPSA_MAX_PHYS_LUN;
1629         }
1630         if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1631                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1632                 return -1;
1633         }
1634         *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1635         /* Reject Logicals in excess of our max capability. */
1636         if (*nlogicals > HPSA_MAX_LUN) {
1637                 dev_warn(&h->pdev->dev,
1638                         "maximum logical LUNs (%d) exceeded.  "
1639                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
1640                         *nlogicals - HPSA_MAX_LUN);
1641                         *nlogicals = HPSA_MAX_LUN;
1642         }
1643         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1644                 dev_warn(&h->pdev->dev,
1645                         "maximum logical + physical LUNs (%d) exceeded. "
1646                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1647                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1648                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1649         }
1650         return 0;
1651 }
1652
1653 u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1654         int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1655         struct ReportLUNdata *logdev_list)
1656 {
1657         /* Helper function, figure out where the LUN ID info is coming from
1658          * given index i, lists of physical and logical devices, where in
1659          * the list the raid controller is supposed to appear (first or last)
1660          */
1661
1662         int logicals_start = nphysicals + (raid_ctlr_position == 0);
1663         int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1664
1665         if (i == raid_ctlr_position)
1666                 return RAID_CTLR_LUNID;
1667
1668         if (i < logicals_start)
1669                 return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1670
1671         if (i < last_device)
1672                 return &logdev_list->LUN[i - nphysicals -
1673                         (raid_ctlr_position == 0)][0];
1674         BUG();
1675         return NULL;
1676 }
1677
1678 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1679 {
1680         /* the idea here is we could get notified
1681          * that some devices have changed, so we do a report
1682          * physical luns and report logical luns cmd, and adjust
1683          * our list of devices accordingly.
1684          *
1685          * The scsi3addr's of devices won't change so long as the
1686          * adapter is not reset.  That means we can rescan and
1687          * tell which devices we already know about, vs. new
1688          * devices, vs.  disappearing devices.
1689          */
1690         struct ReportLUNdata *physdev_list = NULL;
1691         struct ReportLUNdata *logdev_list = NULL;
1692         unsigned char *inq_buff = NULL;
1693         u32 nphysicals = 0;
1694         u32 nlogicals = 0;
1695         u32 ndev_allocated = 0;
1696         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1697         int ncurrent = 0;
1698         int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1699         int i, nmsa2xxx_enclosures, ndevs_to_allocate;
1700         int bus, target, lun;
1701         int raid_ctlr_position;
1702         DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR);
1703
1704         currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA,
1705                 GFP_KERNEL);
1706         physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1707         logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1708         inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1709         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1710
1711         if (!currentsd || !physdev_list || !logdev_list ||
1712                 !inq_buff || !tmpdevice) {
1713                 dev_err(&h->pdev->dev, "out of memory\n");
1714                 goto out;
1715         }
1716         memset(lunzerobits, 0, sizeof(lunzerobits));
1717
1718         if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1719                         logdev_list, &nlogicals))
1720                 goto out;
1721
1722         /* We might see up to 32 MSA2xxx enclosures, actually 8 of them
1723          * but each of them 4 times through different paths.  The plus 1
1724          * is for the RAID controller.
1725          */
1726         ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1;
1727
1728         /* Allocate the per device structures */
1729         for (i = 0; i < ndevs_to_allocate; i++) {
1730                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1731                 if (!currentsd[i]) {
1732                         dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1733                                 __FILE__, __LINE__);
1734                         goto out;
1735                 }
1736                 ndev_allocated++;
1737         }
1738
1739         if (unlikely(is_scsi_rev_5(h)))
1740                 raid_ctlr_position = 0;
1741         else
1742                 raid_ctlr_position = nphysicals + nlogicals;
1743
1744         /* adjust our table of devices */
1745         nmsa2xxx_enclosures = 0;
1746         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
1747                 u8 *lunaddrbytes;
1748
1749                 /* Figure out where the LUN ID info is coming from */
1750                 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
1751                         i, nphysicals, nlogicals, physdev_list, logdev_list);
1752                 /* skip masked physical devices. */
1753                 if (lunaddrbytes[3] & 0xC0 &&
1754                         i < nphysicals + (raid_ctlr_position == 0))
1755                         continue;
1756
1757                 /* Get device type, vendor, model, device id */
1758                 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice))
1759                         continue; /* skip it if we can't talk to it. */
1760                 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun,
1761                         tmpdevice);
1762                 this_device = currentsd[ncurrent];
1763
1764                 /*
1765                  * For the msa2xxx boxes, we have to insert a LUN 0 which
1766                  * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
1767                  * is nonetheless an enclosure device there.  We have to
1768                  * present that otherwise linux won't find anything if
1769                  * there is no lun 0.
1770                  */
1771                 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device,
1772                                 lunaddrbytes, bus, target, lun, lunzerobits,
1773                                 &nmsa2xxx_enclosures)) {
1774                         ncurrent++;
1775                         this_device = currentsd[ncurrent];
1776                 }
1777
1778                 *this_device = *tmpdevice;
1779                 hpsa_set_bus_target_lun(this_device, bus, target, lun);
1780
1781                 switch (this_device->devtype) {
1782                 case TYPE_ROM: {
1783                         /* We don't *really* support actual CD-ROM devices,
1784                          * just "One Button Disaster Recovery" tape drive
1785                          * which temporarily pretends to be a CD-ROM drive.
1786                          * So we check that the device is really an OBDR tape
1787                          * device by checking for "$DR-10" in bytes 43-48 of
1788                          * the inquiry data.
1789                          */
1790                                 char obdr_sig[7];
1791 #define OBDR_TAPE_SIG "$DR-10"
1792                                 strncpy(obdr_sig, &inq_buff[43], 6);
1793                                 obdr_sig[6] = '\0';
1794                                 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1795                                         /* Not OBDR device, ignore it. */
1796                                         break;
1797                         }
1798                         ncurrent++;
1799                         break;
1800                 case TYPE_DISK:
1801                         if (i < nphysicals)
1802                                 break;
1803                         ncurrent++;
1804                         break;
1805                 case TYPE_TAPE:
1806                 case TYPE_MEDIUM_CHANGER:
1807                         ncurrent++;
1808                         break;
1809                 case TYPE_RAID:
1810                         /* Only present the Smartarray HBA as a RAID controller.
1811                          * If it's a RAID controller other than the HBA itself
1812                          * (an external RAID controller, MSA500 or similar)
1813                          * don't present it.
1814                          */
1815                         if (!is_hba_lunid(lunaddrbytes))
1816                                 break;
1817                         ncurrent++;
1818                         break;
1819                 default:
1820                         break;
1821                 }
1822                 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA)
1823                         break;
1824         }
1825         adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
1826 out:
1827         kfree(tmpdevice);
1828         for (i = 0; i < ndev_allocated; i++)
1829                 kfree(currentsd[i]);
1830         kfree(currentsd);
1831         kfree(inq_buff);
1832         kfree(physdev_list);
1833         kfree(logdev_list);
1834 }
1835
1836 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1837  * dma mapping  and fills in the scatter gather entries of the
1838  * hpsa command, cp.
1839  */
1840 static int hpsa_scatter_gather(struct ctlr_info *h,
1841                 struct CommandList *cp,
1842                 struct scsi_cmnd *cmd)
1843 {
1844         unsigned int len;
1845         struct scatterlist *sg;
1846         u64 addr64;
1847         int use_sg, i, sg_index, chained;
1848         struct SGDescriptor *curr_sg;
1849
1850         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1851
1852         use_sg = scsi_dma_map(cmd);
1853         if (use_sg < 0)
1854                 return use_sg;
1855
1856         if (!use_sg)
1857                 goto sglist_finished;
1858
1859         curr_sg = cp->SG;
1860         chained = 0;
1861         sg_index = 0;
1862         scsi_for_each_sg(cmd, sg, use_sg, i) {
1863                 if (i == h->max_cmd_sg_entries - 1 &&
1864                         use_sg > h->max_cmd_sg_entries) {
1865                         chained = 1;
1866                         curr_sg = h->cmd_sg_list[cp->cmdindex];
1867                         sg_index = 0;
1868                 }
1869                 addr64 = (u64) sg_dma_address(sg);
1870                 len  = sg_dma_len(sg);
1871                 curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
1872                 curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1873                 curr_sg->Len = len;
1874                 curr_sg->Ext = 0;  /* we are not chaining */
1875                 curr_sg++;
1876         }
1877
1878         if (use_sg + chained > h->maxSG)
1879                 h->maxSG = use_sg + chained;
1880
1881         if (chained) {
1882                 cp->Header.SGList = h->max_cmd_sg_entries;
1883                 cp->Header.SGTotal = (u16) (use_sg + 1);
1884                 hpsa_map_sg_chain_block(h, cp);
1885                 return 0;
1886         }
1887
1888 sglist_finished:
1889
1890         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
1891         cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
1892         return 0;
1893 }
1894
1895
1896 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
1897         void (*done)(struct scsi_cmnd *))
1898 {
1899         struct ctlr_info *h;
1900         struct hpsa_scsi_dev_t *dev;
1901         unsigned char scsi3addr[8];
1902         struct CommandList *c;
1903         unsigned long flags;
1904
1905         /* Get the ptr to our adapter structure out of cmd->host. */
1906         h = sdev_to_hba(cmd->device);
1907         dev = cmd->device->hostdata;
1908         if (!dev) {
1909                 cmd->result = DID_NO_CONNECT << 16;
1910                 done(cmd);
1911                 return 0;
1912         }
1913         memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
1914
1915         /* Need a lock as this is being allocated from the pool */
1916         spin_lock_irqsave(&h->lock, flags);
1917         c = cmd_alloc(h);
1918         spin_unlock_irqrestore(&h->lock, flags);
1919         if (c == NULL) {                        /* trouble... */
1920                 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
1921                 return SCSI_MLQUEUE_HOST_BUSY;
1922         }
1923
1924         /* Fill in the command list header */
1925
1926         cmd->scsi_done = done;    /* save this for use by completion code */
1927
1928         /* save c in case we have to abort it  */
1929         cmd->host_scribble = (unsigned char *) c;
1930
1931         c->cmd_type = CMD_SCSI;
1932         c->scsi_cmd = cmd;
1933         c->Header.ReplyQueue = 0;  /* unused in simple mode */
1934         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1935         c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
1936         c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
1937
1938         /* Fill in the request block... */
1939
1940         c->Request.Timeout = 0;
1941         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1942         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1943         c->Request.CDBLen = cmd->cmd_len;
1944         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1945         c->Request.Type.Type = TYPE_CMD;
1946         c->Request.Type.Attribute = ATTR_SIMPLE;
1947         switch (cmd->sc_data_direction) {
1948         case DMA_TO_DEVICE:
1949                 c->Request.Type.Direction = XFER_WRITE;
1950                 break;
1951         case DMA_FROM_DEVICE:
1952                 c->Request.Type.Direction = XFER_READ;
1953                 break;
1954         case DMA_NONE:
1955                 c->Request.Type.Direction = XFER_NONE;
1956                 break;
1957         case DMA_BIDIRECTIONAL:
1958                 /* This can happen if a buggy application does a scsi passthru
1959                  * and sets both inlen and outlen to non-zero. ( see
1960                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1961                  */
1962
1963                 c->Request.Type.Direction = XFER_RSVD;
1964                 /* This is technically wrong, and hpsa controllers should
1965                  * reject it with CMD_INVALID, which is the most correct
1966                  * response, but non-fibre backends appear to let it
1967                  * slide by, and give the same results as if this field
1968                  * were set correctly.  Either way is acceptable for
1969                  * our purposes here.
1970                  */
1971
1972                 break;
1973
1974         default:
1975                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
1976                         cmd->sc_data_direction);
1977                 BUG();
1978                 break;
1979         }
1980
1981         if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
1982                 cmd_free(h, c);
1983                 return SCSI_MLQUEUE_HOST_BUSY;
1984         }
1985         enqueue_cmd_and_start_io(h, c);
1986         /* the cmd'll come back via intr handler in complete_scsi_command()  */
1987         return 0;
1988 }
1989
1990 static void hpsa_scan_start(struct Scsi_Host *sh)
1991 {
1992         struct ctlr_info *h = shost_to_hba(sh);
1993         unsigned long flags;
1994
1995         /* wait until any scan already in progress is finished. */
1996         while (1) {
1997                 spin_lock_irqsave(&h->scan_lock, flags);
1998                 if (h->scan_finished)
1999                         break;
2000                 spin_unlock_irqrestore(&h->scan_lock, flags);
2001                 wait_event(h->scan_wait_queue, h->scan_finished);
2002                 /* Note: We don't need to worry about a race between this
2003                  * thread and driver unload because the midlayer will
2004                  * have incremented the reference count, so unload won't
2005                  * happen if we're in here.
2006                  */
2007         }
2008         h->scan_finished = 0; /* mark scan as in progress */
2009         spin_unlock_irqrestore(&h->scan_lock, flags);
2010
2011         hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2012
2013         spin_lock_irqsave(&h->scan_lock, flags);
2014         h->scan_finished = 1; /* mark scan as finished. */
2015         wake_up_all(&h->scan_wait_queue);
2016         spin_unlock_irqrestore(&h->scan_lock, flags);
2017 }
2018
2019 static int hpsa_scan_finished(struct Scsi_Host *sh,
2020         unsigned long elapsed_time)
2021 {
2022         struct ctlr_info *h = shost_to_hba(sh);
2023         unsigned long flags;
2024         int finished;
2025
2026         spin_lock_irqsave(&h->scan_lock, flags);
2027         finished = h->scan_finished;
2028         spin_unlock_irqrestore(&h->scan_lock, flags);
2029         return finished;
2030 }
2031
2032 static int hpsa_change_queue_depth(struct scsi_device *sdev,
2033         int qdepth, int reason)
2034 {
2035         struct ctlr_info *h = sdev_to_hba(sdev);
2036
2037         if (reason != SCSI_QDEPTH_DEFAULT)
2038                 return -ENOTSUPP;
2039
2040         if (qdepth < 1)
2041                 qdepth = 1;
2042         else
2043                 if (qdepth > h->nr_cmds)
2044                         qdepth = h->nr_cmds;
2045         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2046         return sdev->queue_depth;
2047 }
2048
2049 static void hpsa_unregister_scsi(struct ctlr_info *h)
2050 {
2051         /* we are being forcibly unloaded, and may not refuse. */
2052         scsi_remove_host(h->scsi_host);
2053         scsi_host_put(h->scsi_host);
2054         h->scsi_host = NULL;
2055 }
2056
2057 static int hpsa_register_scsi(struct ctlr_info *h)
2058 {
2059         int rc;
2060
2061         rc = hpsa_scsi_detect(h);
2062         if (rc != 0)
2063                 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed"
2064                         " hpsa_scsi_detect(), rc is %d\n", rc);
2065         return rc;
2066 }
2067
2068 static int wait_for_device_to_become_ready(struct ctlr_info *h,
2069         unsigned char lunaddr[])
2070 {
2071         int rc = 0;
2072         int count = 0;
2073         int waittime = 1; /* seconds */
2074         struct CommandList *c;
2075
2076         c = cmd_special_alloc(h);
2077         if (!c) {
2078                 dev_warn(&h->pdev->dev, "out of memory in "
2079                         "wait_for_device_to_become_ready.\n");
2080                 return IO_ERROR;
2081         }
2082
2083         /* Send test unit ready until device ready, or give up. */
2084         while (count < HPSA_TUR_RETRY_LIMIT) {
2085
2086                 /* Wait for a bit.  do this first, because if we send
2087                  * the TUR right away, the reset will just abort it.
2088                  */
2089                 msleep(1000 * waittime);
2090                 count++;
2091
2092                 /* Increase wait time with each try, up to a point. */
2093                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2094                         waittime = waittime * 2;
2095
2096                 /* Send the Test Unit Ready */
2097                 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
2098                 hpsa_scsi_do_simple_cmd_core(h, c);
2099                 /* no unmap needed here because no data xfer. */
2100
2101                 if (c->err_info->CommandStatus == CMD_SUCCESS)
2102                         break;
2103
2104                 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2105                         c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2106                         (c->err_info->SenseInfo[2] == NO_SENSE ||
2107                         c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2108                         break;
2109
2110                 dev_warn(&h->pdev->dev, "waiting %d secs "
2111                         "for device to become ready.\n", waittime);
2112                 rc = 1; /* device not ready. */
2113         }
2114
2115         if (rc)
2116                 dev_warn(&h->pdev->dev, "giving up on device.\n");
2117         else
2118                 dev_warn(&h->pdev->dev, "device is ready.\n");
2119
2120         cmd_special_free(h, c);
2121         return rc;
2122 }
2123
2124 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
2125  * complaining.  Doing a host- or bus-reset can't do anything good here.
2126  */
2127 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2128 {
2129         int rc;
2130         struct ctlr_info *h;
2131         struct hpsa_scsi_dev_t *dev;
2132
2133         /* find the controller to which the command to be aborted was sent */
2134         h = sdev_to_hba(scsicmd->device);
2135         if (h == NULL) /* paranoia */
2136                 return FAILED;
2137         dev = scsicmd->device->hostdata;
2138         if (!dev) {
2139                 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2140                         "device lookup failed.\n");
2141                 return FAILED;
2142         }
2143         dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2144                 h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2145         /* send a reset to the SCSI LUN which the command was sent to */
2146         rc = hpsa_send_reset(h, dev->scsi3addr);
2147         if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2148                 return SUCCESS;
2149
2150         dev_warn(&h->pdev->dev, "resetting device failed.\n");
2151         return FAILED;
2152 }
2153
2154 /*
2155  * For operations that cannot sleep, a command block is allocated at init,
2156  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2157  * which ones are free or in use.  Lock must be held when calling this.
2158  * cmd_free() is the complement.
2159  */
2160 static struct CommandList *cmd_alloc(struct ctlr_info *h)
2161 {
2162         struct CommandList *c;
2163         int i;
2164         union u64bit temp64;
2165         dma_addr_t cmd_dma_handle, err_dma_handle;
2166
2167         do {
2168                 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2169                 if (i == h->nr_cmds)
2170                         return NULL;
2171         } while (test_and_set_bit
2172                  (i & (BITS_PER_LONG - 1),
2173                   h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2174         c = h->cmd_pool + i;
2175         memset(c, 0, sizeof(*c));
2176         cmd_dma_handle = h->cmd_pool_dhandle
2177             + i * sizeof(*c);
2178         c->err_info = h->errinfo_pool + i;
2179         memset(c->err_info, 0, sizeof(*c->err_info));
2180         err_dma_handle = h->errinfo_pool_dhandle
2181             + i * sizeof(*c->err_info);
2182         h->nr_allocs++;
2183
2184         c->cmdindex = i;
2185
2186         INIT_HLIST_NODE(&c->list);
2187         c->busaddr = (u32) cmd_dma_handle;
2188         temp64.val = (u64) err_dma_handle;
2189         c->ErrDesc.Addr.lower = temp64.val32.lower;
2190         c->ErrDesc.Addr.upper = temp64.val32.upper;
2191         c->ErrDesc.Len = sizeof(*c->err_info);
2192
2193         c->h = h;
2194         return c;
2195 }
2196
2197 /* For operations that can wait for kmalloc to possibly sleep,
2198  * this routine can be called. Lock need not be held to call
2199  * cmd_special_alloc. cmd_special_free() is the complement.
2200  */
2201 static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2202 {
2203         struct CommandList *c;
2204         union u64bit temp64;
2205         dma_addr_t cmd_dma_handle, err_dma_handle;
2206
2207         c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2208         if (c == NULL)
2209                 return NULL;
2210         memset(c, 0, sizeof(*c));
2211
2212         c->cmdindex = -1;
2213
2214         c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2215                     &err_dma_handle);
2216
2217         if (c->err_info == NULL) {
2218                 pci_free_consistent(h->pdev,
2219                         sizeof(*c), c, cmd_dma_handle);
2220                 return NULL;
2221         }
2222         memset(c->err_info, 0, sizeof(*c->err_info));
2223
2224         INIT_HLIST_NODE(&c->list);
2225         c->busaddr = (u32) cmd_dma_handle;
2226         temp64.val = (u64) err_dma_handle;
2227         c->ErrDesc.Addr.lower = temp64.val32.lower;
2228         c->ErrDesc.Addr.upper = temp64.val32.upper;
2229         c->ErrDesc.Len = sizeof(*c->err_info);
2230
2231         c->h = h;
2232         return c;
2233 }
2234
2235 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2236 {
2237         int i;
2238
2239         i = c - h->cmd_pool;
2240         clear_bit(i & (BITS_PER_LONG - 1),
2241                   h->cmd_pool_bits + (i / BITS_PER_LONG));
2242         h->nr_frees++;
2243 }
2244
2245 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2246 {
2247         union u64bit temp64;
2248
2249         temp64.val32.lower = c->ErrDesc.Addr.lower;
2250         temp64.val32.upper = c->ErrDesc.Addr.upper;
2251         pci_free_consistent(h->pdev, sizeof(*c->err_info),
2252                             c->err_info, (dma_addr_t) temp64.val);
2253         pci_free_consistent(h->pdev, sizeof(*c),
2254                             c, (dma_addr_t) c->busaddr);
2255 }
2256
2257 #ifdef CONFIG_COMPAT
2258
2259 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2260 {
2261         IOCTL32_Command_struct __user *arg32 =
2262             (IOCTL32_Command_struct __user *) arg;
2263         IOCTL_Command_struct arg64;
2264         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2265         int err;
2266         u32 cp;
2267
2268         err = 0;
2269         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2270                            sizeof(arg64.LUN_info));
2271         err |= copy_from_user(&arg64.Request, &arg32->Request,
2272                            sizeof(arg64.Request));
2273         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2274                            sizeof(arg64.error_info));
2275         err |= get_user(arg64.buf_size, &arg32->buf_size);
2276         err |= get_user(cp, &arg32->buf);
2277         arg64.buf = compat_ptr(cp);
2278         err |= copy_to_user(p, &arg64, sizeof(arg64));
2279
2280         if (err)
2281                 return -EFAULT;
2282
2283         err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2284         if (err)
2285                 return err;
2286         err |= copy_in_user(&arg32->error_info, &p->error_info,
2287                          sizeof(arg32->error_info));
2288         if (err)
2289                 return -EFAULT;
2290         return err;
2291 }
2292
2293 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2294         int cmd, void *arg)
2295 {
2296         BIG_IOCTL32_Command_struct __user *arg32 =
2297             (BIG_IOCTL32_Command_struct __user *) arg;
2298         BIG_IOCTL_Command_struct arg64;
2299         BIG_IOCTL_Command_struct __user *p =
2300             compat_alloc_user_space(sizeof(arg64));
2301         int err;
2302         u32 cp;
2303
2304         err = 0;
2305         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2306                            sizeof(arg64.LUN_info));
2307         err |= copy_from_user(&arg64.Request, &arg32->Request,
2308                            sizeof(arg64.Request));
2309         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2310                            sizeof(arg64.error_info));
2311         err |= get_user(arg64.buf_size, &arg32->buf_size);
2312         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2313         err |= get_user(cp, &arg32->buf);
2314         arg64.buf = compat_ptr(cp);
2315         err |= copy_to_user(p, &arg64, sizeof(arg64));
2316
2317         if (err)
2318                 return -EFAULT;
2319
2320         err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2321         if (err)
2322                 return err;
2323         err |= copy_in_user(&arg32->error_info, &p->error_info,
2324                          sizeof(arg32->error_info));
2325         if (err)
2326                 return -EFAULT;
2327         return err;
2328 }
2329
2330 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2331 {
2332         switch (cmd) {
2333         case CCISS_GETPCIINFO:
2334         case CCISS_GETINTINFO:
2335         case CCISS_SETINTINFO:
2336         case CCISS_GETNODENAME:
2337         case CCISS_SETNODENAME:
2338         case CCISS_GETHEARTBEAT:
2339         case CCISS_GETBUSTYPES:
2340         case CCISS_GETFIRMVER:
2341         case CCISS_GETDRIVVER:
2342         case CCISS_REVALIDVOLS:
2343         case CCISS_DEREGDISK:
2344         case CCISS_REGNEWDISK:
2345         case CCISS_REGNEWD:
2346         case CCISS_RESCANDISK:
2347         case CCISS_GETLUNINFO:
2348                 return hpsa_ioctl(dev, cmd, arg);
2349
2350         case CCISS_PASSTHRU32:
2351                 return hpsa_ioctl32_passthru(dev, cmd, arg);
2352         case CCISS_BIG_PASSTHRU32:
2353                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2354
2355         default:
2356                 return -ENOIOCTLCMD;
2357         }
2358 }
2359 #endif
2360
2361 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2362 {
2363         struct hpsa_pci_info pciinfo;
2364
2365         if (!argp)
2366                 return -EINVAL;
2367         pciinfo.domain = pci_domain_nr(h->pdev->bus);
2368         pciinfo.bus = h->pdev->bus->number;
2369         pciinfo.dev_fn = h->pdev->devfn;
2370         pciinfo.board_id = h->board_id;
2371         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2372                 return -EFAULT;
2373         return 0;
2374 }
2375
2376 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2377 {
2378         DriverVer_type DriverVer;
2379         unsigned char vmaj, vmin, vsubmin;
2380         int rc;
2381
2382         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2383                 &vmaj, &vmin, &vsubmin);
2384         if (rc != 3) {
2385                 dev_info(&h->pdev->dev, "driver version string '%s' "
2386                         "unrecognized.", HPSA_DRIVER_VERSION);
2387                 vmaj = 0;
2388                 vmin = 0;
2389                 vsubmin = 0;
2390         }
2391         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2392         if (!argp)
2393                 return -EINVAL;
2394         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2395                 return -EFAULT;
2396         return 0;
2397 }
2398
2399 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2400 {
2401         IOCTL_Command_struct iocommand;
2402         struct CommandList *c;
2403         char *buff = NULL;
2404         union u64bit temp64;
2405
2406         if (!argp)
2407                 return -EINVAL;
2408         if (!capable(CAP_SYS_RAWIO))
2409                 return -EPERM;
2410         if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2411                 return -EFAULT;
2412         if ((iocommand.buf_size < 1) &&
2413             (iocommand.Request.Type.Direction != XFER_NONE)) {
2414                 return -EINVAL;
2415         }
2416         if (iocommand.buf_size > 0) {
2417                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2418                 if (buff == NULL)
2419                         return -EFAULT;
2420         }
2421         if (iocommand.Request.Type.Direction == XFER_WRITE) {
2422                 /* Copy the data into the buffer we created */
2423                 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) {
2424                         kfree(buff);
2425                         return -EFAULT;
2426                 }
2427         } else
2428                 memset(buff, 0, iocommand.buf_size);
2429         c = cmd_special_alloc(h);
2430         if (c == NULL) {
2431                 kfree(buff);
2432                 return -ENOMEM;
2433         }
2434         /* Fill in the command type */
2435         c->cmd_type = CMD_IOCTL_PEND;
2436         /* Fill in Command Header */
2437         c->Header.ReplyQueue = 0; /* unused in simple mode */
2438         if (iocommand.buf_size > 0) {   /* buffer to fill */
2439                 c->Header.SGList = 1;
2440                 c->Header.SGTotal = 1;
2441         } else  { /* no buffers to fill */
2442                 c->Header.SGList = 0;
2443                 c->Header.SGTotal = 0;
2444         }
2445         memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2446         /* use the kernel address the cmd block for tag */
2447         c->Header.Tag.lower = c->busaddr;
2448
2449         /* Fill in Request block */
2450         memcpy(&c->Request, &iocommand.Request,
2451                 sizeof(c->Request));
2452
2453         /* Fill in the scatter gather information */
2454         if (iocommand.buf_size > 0) {
2455                 temp64.val = pci_map_single(h->pdev, buff,
2456                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2457                 c->SG[0].Addr.lower = temp64.val32.lower;
2458                 c->SG[0].Addr.upper = temp64.val32.upper;
2459                 c->SG[0].Len = iocommand.buf_size;
2460                 c->SG[0].Ext = 0; /* we are not chaining*/
2461         }
2462         hpsa_scsi_do_simple_cmd_core(h, c);
2463         hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2464         check_ioctl_unit_attention(h, c);
2465
2466         /* Copy the error information out */
2467         memcpy(&iocommand.error_info, c->err_info,
2468                 sizeof(iocommand.error_info));
2469         if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
2470                 kfree(buff);
2471                 cmd_special_free(h, c);
2472                 return -EFAULT;
2473         }
2474
2475         if (iocommand.Request.Type.Direction == XFER_READ) {
2476                 /* Copy the data out of the buffer we created */
2477                 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
2478                         kfree(buff);
2479                         cmd_special_free(h, c);
2480                         return -EFAULT;
2481                 }
2482         }
2483         kfree(buff);
2484         cmd_special_free(h, c);
2485         return 0;
2486 }
2487
2488 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2489 {
2490         BIG_IOCTL_Command_struct *ioc;
2491         struct CommandList *c;
2492         unsigned char **buff = NULL;
2493         int *buff_size = NULL;
2494         union u64bit temp64;
2495         BYTE sg_used = 0;
2496         int status = 0;
2497         int i;
2498         u32 left;
2499         u32 sz;
2500         BYTE __user *data_ptr;
2501
2502         if (!argp)
2503                 return -EINVAL;
2504         if (!capable(CAP_SYS_RAWIO))
2505                 return -EPERM;
2506         ioc = (BIG_IOCTL_Command_struct *)
2507             kmalloc(sizeof(*ioc), GFP_KERNEL);
2508         if (!ioc) {
2509                 status = -ENOMEM;
2510                 goto cleanup1;
2511         }
2512         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
2513                 status = -EFAULT;
2514                 goto cleanup1;
2515         }
2516         if ((ioc->buf_size < 1) &&
2517             (ioc->Request.Type.Direction != XFER_NONE)) {
2518                 status = -EINVAL;
2519                 goto cleanup1;
2520         }
2521         /* Check kmalloc limits  using all SGs */
2522         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
2523                 status = -EINVAL;
2524                 goto cleanup1;
2525         }
2526         if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
2527                 status = -EINVAL;
2528                 goto cleanup1;
2529         }
2530         buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
2531         if (!buff) {
2532                 status = -ENOMEM;
2533                 goto cleanup1;
2534         }
2535         buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
2536         if (!buff_size) {
2537                 status = -ENOMEM;
2538                 goto cleanup1;
2539         }
2540         left = ioc->buf_size;
2541         data_ptr = ioc->buf;
2542         while (left) {
2543                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
2544                 buff_size[sg_used] = sz;
2545                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
2546                 if (buff[sg_used] == NULL) {
2547                         status = -ENOMEM;
2548                         goto cleanup1;
2549                 }
2550                 if (ioc->Request.Type.Direction == XFER_WRITE) {
2551                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
2552                                 status = -ENOMEM;
2553                                 goto cleanup1;
2554                         }
2555                 } else
2556                         memset(buff[sg_used], 0, sz);
2557                 left -= sz;
2558                 data_ptr += sz;
2559                 sg_used++;
2560         }
2561         c = cmd_special_alloc(h);
2562         if (c == NULL) {
2563                 status = -ENOMEM;
2564                 goto cleanup1;
2565         }
2566         c->cmd_type = CMD_IOCTL_PEND;
2567         c->Header.ReplyQueue = 0;
2568
2569         if (ioc->buf_size > 0) {
2570                 c->Header.SGList = sg_used;
2571                 c->Header.SGTotal = sg_used;
2572         } else {
2573                 c->Header.SGList = 0;
2574                 c->Header.SGTotal = 0;
2575         }
2576         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
2577         c->Header.Tag.lower = c->busaddr;
2578         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
2579         if (ioc->buf_size > 0) {
2580                 int i;
2581                 for (i = 0; i < sg_used; i++) {
2582                         temp64.val = pci_map_single(h->pdev, buff[i],
2583                                     buff_size[i], PCI_DMA_BIDIRECTIONAL);
2584                         c->SG[i].Addr.lower = temp64.val32.lower;
2585                         c->SG[i].Addr.upper = temp64.val32.upper;
2586                         c->SG[i].Len = buff_size[i];
2587                         /* we are not chaining */
2588                         c->SG[i].Ext = 0;
2589                 }
2590         }
2591         hpsa_scsi_do_simple_cmd_core(h, c);
2592         hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
2593         check_ioctl_unit_attention(h, c);
2594         /* Copy the error information out */
2595         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
2596         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
2597                 cmd_special_free(h, c);
2598                 status = -EFAULT;
2599                 goto cleanup1;
2600         }
2601         if (ioc->Request.Type.Direction == XFER_READ) {
2602                 /* Copy the data out of the buffer we created */
2603                 BYTE __user *ptr = ioc->buf;
2604                 for (i = 0; i < sg_used; i++) {
2605                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
2606                                 cmd_special_free(h, c);
2607                                 status = -EFAULT;
2608                                 goto cleanup1;
2609                         }
2610                         ptr += buff_size[i];
2611                 }
2612         }
2613         cmd_special_free(h, c);
2614         status = 0;
2615 cleanup1:
2616         if (buff) {
2617                 for (i = 0; i < sg_used; i++)
2618                         kfree(buff[i]);
2619                 kfree(buff);
2620         }
2621         kfree(buff_size);
2622         kfree(ioc);
2623         return status;
2624 }
2625
2626 static void check_ioctl_unit_attention(struct ctlr_info *h,
2627         struct CommandList *c)
2628 {
2629         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2630                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
2631                 (void) check_for_unit_attention(h, c);
2632 }
2633 /*
2634  * ioctl
2635  */
2636 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
2637 {
2638         struct ctlr_info *h;
2639         void __user *argp = (void __user *)arg;
2640
2641         h = sdev_to_hba(dev);
2642
2643         switch (cmd) {
2644         case CCISS_DEREGDISK:
2645         case CCISS_REGNEWDISK:
2646         case CCISS_REGNEWD:
2647                 hpsa_scan_start(h->scsi_host);
2648                 return 0;
2649         case CCISS_GETPCIINFO:
2650                 return hpsa_getpciinfo_ioctl(h, argp);
2651         case CCISS_GETDRIVVER:
2652                 return hpsa_getdrivver_ioctl(h, argp);
2653         case CCISS_PASSTHRU:
2654                 return hpsa_passthru_ioctl(h, argp);
2655         case CCISS_BIG_PASSTHRU:
2656                 return hpsa_big_passthru_ioctl(h, argp);
2657         default:
2658                 return -ENOTTY;
2659         }
2660 }
2661
2662 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
2663         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
2664         int cmd_type)
2665 {
2666         int pci_dir = XFER_NONE;
2667
2668         c->cmd_type = CMD_IOCTL_PEND;
2669         c->Header.ReplyQueue = 0;
2670         if (buff != NULL && size > 0) {
2671                 c->Header.SGList = 1;
2672                 c->Header.SGTotal = 1;
2673         } else {
2674                 c->Header.SGList = 0;
2675                 c->Header.SGTotal = 0;
2676         }
2677         c->Header.Tag.lower = c->busaddr;
2678         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2679
2680         c->Request.Type.Type = cmd_type;
2681         if (cmd_type == TYPE_CMD) {
2682                 switch (cmd) {
2683                 case HPSA_INQUIRY:
2684                         /* are we trying to read a vital product page */
2685                         if (page_code != 0) {
2686                                 c->Request.CDB[1] = 0x01;
2687                                 c->Request.CDB[2] = page_code;
2688                         }
2689                         c->Request.CDBLen = 6;
2690                         c->Request.Type.Attribute = ATTR_SIMPLE;
2691                         c->Request.Type.Direction = XFER_READ;
2692                         c->Request.Timeout = 0;
2693                         c->Request.CDB[0] = HPSA_INQUIRY;
2694                         c->Request.CDB[4] = size & 0xFF;
2695                         break;
2696                 case HPSA_REPORT_LOG:
2697                 case HPSA_REPORT_PHYS:
2698                         /* Talking to controller so It's a physical command
2699                            mode = 00 target = 0.  Nothing to write.
2700                          */
2701                         c->Request.CDBLen = 12;
2702                         c->Request.Type.Attribute = ATTR_SIMPLE;
2703                         c->Request.Type.Direction = XFER_READ;
2704                         c->Request.Timeout = 0;
2705                         c->Request.CDB[0] = cmd;
2706                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2707                         c->Request.CDB[7] = (size >> 16) & 0xFF;
2708                         c->Request.CDB[8] = (size >> 8) & 0xFF;
2709                         c->Request.CDB[9] = size & 0xFF;
2710                         break;
2711
2712                 case HPSA_READ_CAPACITY:
2713                         c->Request.CDBLen = 10;
2714                         c->Request.Type.Attribute = ATTR_SIMPLE;
2715                         c->Request.Type.Direction = XFER_READ;
2716                         c->Request.Timeout = 0;
2717                         c->Request.CDB[0] = cmd;
2718                         break;
2719                 case HPSA_CACHE_FLUSH:
2720                         c->Request.CDBLen = 12;
2721                         c->Request.Type.Attribute = ATTR_SIMPLE;
2722                         c->Request.Type.Direction = XFER_WRITE;
2723                         c->Request.Timeout = 0;
2724                         c->Request.CDB[0] = BMIC_WRITE;
2725                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2726                         break;
2727                 case TEST_UNIT_READY:
2728                         c->Request.CDBLen = 6;
2729                         c->Request.Type.Attribute = ATTR_SIMPLE;
2730                         c->Request.Type.Direction = XFER_NONE;
2731                         c->Request.Timeout = 0;
2732                         break;
2733                 default:
2734                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
2735                         BUG();
2736                         return;
2737                 }
2738         } else if (cmd_type == TYPE_MSG) {
2739                 switch (cmd) {
2740
2741                 case  HPSA_DEVICE_RESET_MSG:
2742                         c->Request.CDBLen = 16;
2743                         c->Request.Type.Type =  1; /* It is a MSG not a CMD */
2744                         c->Request.Type.Attribute = ATTR_SIMPLE;
2745                         c->Request.Type.Direction = XFER_NONE;
2746                         c->Request.Timeout = 0; /* Don't time out */
2747                         c->Request.CDB[0] =  0x01; /* RESET_MSG is 0x01 */
2748                         c->Request.CDB[1] = 0x03;  /* Reset target above */
2749                         /* If bytes 4-7 are zero, it means reset the */
2750                         /* LunID device */
2751                         c->Request.CDB[4] = 0x00;
2752                         c->Request.CDB[5] = 0x00;
2753                         c->Request.CDB[6] = 0x00;
2754                         c->Request.CDB[7] = 0x00;
2755                 break;
2756
2757                 default:
2758                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
2759                                 cmd);
2760                         BUG();
2761                 }
2762         } else {
2763                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
2764                 BUG();
2765         }
2766
2767         switch (c->Request.Type.Direction) {
2768         case XFER_READ:
2769                 pci_dir = PCI_DMA_FROMDEVICE;
2770                 break;
2771         case XFER_WRITE:
2772                 pci_dir = PCI_DMA_TODEVICE;
2773                 break;
2774         case XFER_NONE:
2775                 pci_dir = PCI_DMA_NONE;
2776                 break;
2777         default:
2778                 pci_dir = PCI_DMA_BIDIRECTIONAL;
2779         }
2780
2781         hpsa_map_one(h->pdev, c, buff, size, pci_dir);
2782
2783         return;
2784 }
2785
2786 /*
2787  * Map (physical) PCI mem into (virtual) kernel space
2788  */
2789 static void __iomem *remap_pci_mem(ulong base, ulong size)
2790 {
2791         ulong page_base = ((ulong) base) & PAGE_MASK;
2792         ulong page_offs = ((ulong) base) - page_base;
2793         void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2794
2795         return page_remapped ? (page_remapped + page_offs) : NULL;
2796 }
2797
2798 /* Takes cmds off the submission queue and sends them to the hardware,
2799  * then puts them on the queue of cmds waiting for completion.
2800  */
2801 static void start_io(struct ctlr_info *h)
2802 {
2803         struct CommandList *c;
2804
2805         while (!hlist_empty(&h->reqQ)) {
2806                 c = hlist_entry(h->reqQ.first, struct CommandList, list);
2807                 /* can't do anything if fifo is full */
2808                 if ((h->access.fifo_full(h))) {
2809                         dev_warn(&h->pdev->dev, "fifo full\n");
2810                         break;
2811                 }
2812
2813                 /* Get the first entry from the Request Q */
2814                 removeQ(c);
2815                 h->Qdepth--;
2816
2817                 /* Tell the controller execute command */
2818                 h->access.submit_command(h, c);
2819
2820                 /* Put job onto the completed Q */
2821                 addQ(&h->cmpQ, c);
2822         }
2823 }
2824
2825 static inline unsigned long get_next_completion(struct ctlr_info *h)
2826 {
2827         return h->access.command_completed(h);
2828 }
2829
2830 static inline bool interrupt_pending(struct ctlr_info *h)
2831 {
2832         return h->access.intr_pending(h);
2833 }
2834
2835 static inline long interrupt_not_for_us(struct ctlr_info *h)
2836 {
2837         return !(h->msi_vector || h->msix_vector) &&
2838                 ((h->access.intr_pending(h) == 0) ||
2839                 (h->interrupts_enabled == 0));
2840 }
2841
2842 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
2843         u32 raw_tag)
2844 {
2845         if (unlikely(tag_index >= h->nr_cmds)) {
2846                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
2847                 return 1;
2848         }
2849         return 0;
2850 }
2851
2852 static inline void finish_cmd(struct CommandList *c, u32 raw_tag)
2853 {
2854         removeQ(c);
2855         if (likely(c->cmd_type == CMD_SCSI))
2856                 complete_scsi_command(c, 0, raw_tag);
2857         else if (c->cmd_type == CMD_IOCTL_PEND)
2858                 complete(c->waiting);
2859 }
2860
2861 static inline u32 hpsa_tag_contains_index(u32 tag)
2862 {
2863 #define DIRECT_LOOKUP_BIT 0x10
2864         return tag & DIRECT_LOOKUP_BIT;
2865 }
2866
2867 static inline u32 hpsa_tag_to_index(u32 tag)
2868 {
2869 #define DIRECT_LOOKUP_SHIFT 5
2870         return tag >> DIRECT_LOOKUP_SHIFT;
2871 }
2872
2873 static inline u32 hpsa_tag_discard_error_bits(u32 tag)
2874 {
2875 #define HPSA_ERROR_BITS 0x03
2876         return tag & ~HPSA_ERROR_BITS;
2877 }
2878
2879 /* process completion of an indexed ("direct lookup") command */
2880 static inline u32 process_indexed_cmd(struct ctlr_info *h,
2881         u32 raw_tag)
2882 {
2883         u32 tag_index;
2884         struct CommandList *c;
2885
2886         tag_index = hpsa_tag_to_index(raw_tag);
2887         if (bad_tag(h, tag_index, raw_tag))
2888                 return next_command(h);
2889         c = h->cmd_pool + tag_index;
2890         finish_cmd(c, raw_tag);
2891         return next_command(h);
2892 }
2893
2894 /* process completion of a non-indexed command */
2895 static inline u32 process_nonindexed_cmd(struct ctlr_info *h,
2896         u32 raw_tag)
2897 {
2898         u32 tag;
2899         struct CommandList *c = NULL;
2900         struct hlist_node *tmp;
2901
2902         tag = hpsa_tag_discard_error_bits(raw_tag);
2903         hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
2904                 if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
2905                         finish_cmd(c, raw_tag);
2906                         return next_command(h);
2907                 }
2908         }
2909         bad_tag(h, h->nr_cmds + 1, raw_tag);
2910         return next_command(h);
2911 }
2912
2913 static irqreturn_t do_hpsa_intr(int irq, void *dev_id)
2914 {
2915         struct ctlr_info *h = dev_id;
2916         unsigned long flags;
2917         u32 raw_tag;
2918
2919         if (interrupt_not_for_us(h))
2920                 return IRQ_NONE;
2921         spin_lock_irqsave(&h->lock, flags);
2922         raw_tag = get_next_completion(h);
2923         while (raw_tag != FIFO_EMPTY) {
2924                 if (hpsa_tag_contains_index(raw_tag))
2925                         raw_tag = process_indexed_cmd(h, raw_tag);
2926                 else
2927                         raw_tag = process_nonindexed_cmd(h, raw_tag);
2928         }
2929         spin_unlock_irqrestore(&h->lock, flags);
2930         return IRQ_HANDLED;
2931 }
2932
2933 /* Send a message CDB to the firmware. */
2934 static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
2935                                                 unsigned char type)
2936 {
2937         struct Command {
2938                 struct CommandListHeader CommandHeader;
2939                 struct RequestBlock Request;
2940                 struct ErrDescriptor ErrorDescriptor;
2941         };
2942         struct Command *cmd;
2943         static const size_t cmd_sz = sizeof(*cmd) +
2944                                         sizeof(cmd->ErrorDescriptor);
2945         dma_addr_t paddr64;
2946         uint32_t paddr32, tag;
2947         void __iomem *vaddr;
2948         int i, err;
2949
2950         vaddr = pci_ioremap_bar(pdev, 0);
2951         if (vaddr == NULL)
2952                 return -ENOMEM;
2953
2954         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
2955          * CCISS commands, so they must be allocated from the lower 4GiB of
2956          * memory.
2957          */
2958         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2959         if (err) {
2960                 iounmap(vaddr);
2961                 return -ENOMEM;
2962         }
2963
2964         cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
2965         if (cmd == NULL) {
2966                 iounmap(vaddr);
2967                 return -ENOMEM;
2968         }
2969
2970         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
2971          * although there's no guarantee, we assume that the address is at
2972          * least 4-byte aligned (most likely, it's page-aligned).
2973          */
2974         paddr32 = paddr64;
2975
2976         cmd->CommandHeader.ReplyQueue = 0;
2977         cmd->CommandHeader.SGList = 0;
2978         cmd->CommandHeader.SGTotal = 0;
2979         cmd->CommandHeader.Tag.lower = paddr32;
2980         cmd->CommandHeader.Tag.upper = 0;
2981         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
2982
2983         cmd->Request.CDBLen = 16;
2984         cmd->Request.Type.Type = TYPE_MSG;
2985         cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
2986         cmd->Request.Type.Direction = XFER_NONE;
2987         cmd->Request.Timeout = 0; /* Don't time out */
2988         cmd->Request.CDB[0] = opcode;
2989         cmd->Request.CDB[1] = type;
2990         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
2991         cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
2992         cmd->ErrorDescriptor.Addr.upper = 0;
2993         cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
2994
2995         writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
2996
2997         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
2998                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
2999                 if (hpsa_tag_discard_error_bits(tag) == paddr32)
3000                         break;
3001                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
3002         }
3003
3004         iounmap(vaddr);
3005
3006         /* we leak the DMA buffer here ... no choice since the controller could
3007          *  still complete the command.
3008          */
3009         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
3010                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
3011                         opcode, type);
3012                 return -ETIMEDOUT;
3013         }
3014
3015         pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3016
3017         if (tag & HPSA_ERROR_BIT) {
3018                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3019                         opcode, type);
3020                 return -EIO;
3021         }
3022
3023         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3024                 opcode, type);
3025         return 0;
3026 }
3027
3028 #define hpsa_soft_reset_controller(p) hpsa_message(p, 1, 0)
3029 #define hpsa_noop(p) hpsa_message(p, 3, 0)
3030
3031 static __devinit int hpsa_reset_msi(struct pci_dev *pdev)
3032 {
3033 /* the #defines are stolen from drivers/pci/msi.h. */
3034 #define msi_control_reg(base)           (base + PCI_MSI_FLAGS)
3035 #define PCI_MSIX_FLAGS_ENABLE           (1 << 15)
3036
3037         int pos;
3038         u16 control = 0;
3039
3040         pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3041         if (pos) {
3042                 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3043                 if (control & PCI_MSI_FLAGS_ENABLE) {
3044                         dev_info(&pdev->dev, "resetting MSI\n");
3045                         pci_write_config_word(pdev, msi_control_reg(pos),
3046                                         control & ~PCI_MSI_FLAGS_ENABLE);
3047                 }
3048         }
3049
3050         pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3051         if (pos) {
3052                 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3053                 if (control & PCI_MSIX_FLAGS_ENABLE) {
3054                         dev_info(&pdev->dev, "resetting MSI-X\n");
3055                         pci_write_config_word(pdev, msi_control_reg(pos),
3056                                         control & ~PCI_MSIX_FLAGS_ENABLE);
3057                 }
3058         }
3059
3060         return 0;
3061 }
3062
3063 /* This does a hard reset of the controller using PCI power management
3064  * states.
3065  */
3066 static __devinit int hpsa_hard_reset_controller(struct pci_dev *pdev)
3067 {
3068         u16 pmcsr, saved_config_space[32];
3069         int i, pos;
3070
3071         dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3072
3073         /* This is very nearly the same thing as
3074          *
3075          * pci_save_state(pci_dev);
3076          * pci_set_power_state(pci_dev, PCI_D3hot);
3077          * pci_set_power_state(pci_dev, PCI_D0);
3078          * pci_restore_state(pci_dev);
3079          *
3080          * but we can't use these nice canned kernel routines on
3081          * kexec, because they also check the MSI/MSI-X state in PCI
3082          * configuration space and do the wrong thing when it is
3083          * set/cleared.  Also, the pci_save/restore_state functions
3084          * violate the ordering requirements for restoring the
3085          * configuration space from the CCISS document (see the
3086          * comment below).  So we roll our own ....
3087          */
3088
3089         for (i = 0; i < 32; i++)
3090                 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
3091
3092         pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3093         if (pos == 0) {
3094                 dev_err(&pdev->dev,
3095                         "hpsa_reset_controller: PCI PM not supported\n");
3096                 return -ENODEV;
3097         }
3098
3099         /* Quoting from the Open CISS Specification: "The Power
3100          * Management Control/Status Register (CSR) controls the power
3101          * state of the device.  The normal operating state is D0,
3102          * CSR=00h.  The software off state is D3, CSR=03h.  To reset
3103          * the controller, place the interface device in D3 then to
3104          * D0, this causes a secondary PCI reset which will reset the
3105          * controller."
3106          */
3107
3108         /* enter the D3hot power management state */
3109         pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3110         pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3111         pmcsr |= PCI_D3hot;
3112         pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3113
3114         msleep(500);
3115
3116         /* enter the D0 power management state */
3117         pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3118         pmcsr |= PCI_D0;
3119         pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3120
3121         msleep(500);
3122
3123         /* Restore the PCI configuration space.  The Open CISS
3124          * Specification says, "Restore the PCI Configuration
3125          * Registers, offsets 00h through 60h. It is important to
3126          * restore the command register, 16-bits at offset 04h,
3127          * last. Do not restore the configuration status register,
3128          * 16-bits at offset 06h."  Note that the offset is 2*i.
3129          */
3130         for (i = 0; i < 32; i++) {
3131                 if (i == 2 || i == 3)
3132                         continue;
3133                 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
3134         }
3135         wmb();
3136         pci_write_config_word(pdev, 4, saved_config_space[2]);
3137
3138         return 0;
3139 }
3140
3141 /*
3142  *  We cannot read the structure directly, for portability we must use
3143  *   the io functions.
3144  *   This is for debug only.
3145  */
3146 #ifdef HPSA_DEBUG
3147 static void print_cfg_table(struct device *dev, struct CfgTable *tb)
3148 {
3149         int i;
3150         char temp_name[17];
3151
3152         dev_info(dev, "Controller Configuration information\n");
3153         dev_info(dev, "------------------------------------\n");
3154         for (i = 0; i < 4; i++)
3155                 temp_name[i] = readb(&(tb->Signature[i]));
3156         temp_name[4] = '\0';
3157         dev_info(dev, "   Signature = %s\n", temp_name);
3158         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
3159         dev_info(dev, "   Transport methods supported = 0x%x\n",
3160                readl(&(tb->TransportSupport)));
3161         dev_info(dev, "   Transport methods active = 0x%x\n",
3162                readl(&(tb->TransportActive)));
3163         dev_info(dev, "   Requested transport Method = 0x%x\n",
3164                readl(&(tb->HostWrite.TransportRequest)));
3165         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
3166                readl(&(tb->HostWrite.CoalIntDelay)));
3167         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
3168                readl(&(tb->HostWrite.CoalIntCount)));
3169         dev_info(dev, "   Max outstanding commands = 0x%d\n",
3170                readl(&(tb->CmdsOutMax)));
3171         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3172         for (i = 0; i < 16; i++)
3173                 temp_name[i] = readb(&(tb->ServerName[i]));
3174         temp_name[16] = '\0';
3175         dev_info(dev, "   Server Name = %s\n", temp_name);
3176         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
3177                 readl(&(tb->HeartBeat)));
3178 }
3179 #endif                          /* HPSA_DEBUG */
3180
3181 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3182 {
3183         int i, offset, mem_type, bar_type;
3184
3185         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3186                 return 0;
3187         offset = 0;
3188         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3189                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3190                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3191                         offset += 4;
3192                 else {
3193                         mem_type = pci_resource_flags(pdev, i) &
3194                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3195                         switch (mem_type) {
3196                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
3197                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3198                                 offset += 4;    /* 32 bit */
3199                                 break;
3200                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
3201                                 offset += 8;
3202                                 break;
3203                         default:        /* reserved in PCI 2.2 */
3204                                 dev_warn(&pdev->dev,
3205                                        "base address is invalid\n");
3206                                 return -1;
3207                                 break;
3208                         }
3209                 }
3210                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3211                         return i + 1;
3212         }
3213         return -1;
3214 }
3215
3216 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3217  * controllers that are capable. If not, we use IO-APIC mode.
3218  */
3219
3220 static void __devinit hpsa_interrupt_mode(struct ctlr_info *h,
3221                                            struct pci_dev *pdev, u32 board_id)
3222 {
3223 #ifdef CONFIG_PCI_MSI
3224         int err;
3225         struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1},
3226         {0, 2}, {0, 3}
3227         };
3228
3229         /* Some boards advertise MSI but don't really support it */
3230         if ((board_id == 0x40700E11) ||
3231             (board_id == 0x40800E11) ||
3232             (board_id == 0x40820E11) || (board_id == 0x40830E11))
3233                 goto default_int_mode;
3234         if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3235                 dev_info(&pdev->dev, "MSIX\n");
3236                 err = pci_enable_msix(pdev, hpsa_msix_entries, 4);
3237                 if (!err) {
3238                         h->intr[0] = hpsa_msix_entries[0].vector;
3239                         h->intr[1] = hpsa_msix_entries[1].vector;
3240                         h->intr[2] = hpsa_msix_entries[2].vector;
3241                         h->intr[3] = hpsa_msix_entries[3].vector;
3242                         h->msix_vector = 1;
3243                         return;
3244                 }
3245                 if (err > 0) {
3246                         dev_warn(&pdev->dev, "only %d MSI-X vectors "
3247                                "available\n", err);
3248                         goto default_int_mode;
3249                 } else {
3250                         dev_warn(&pdev->dev, "MSI-X init failed %d\n",
3251                                err);
3252                         goto default_int_mode;
3253                 }
3254         }
3255         if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3256                 dev_info(&pdev->dev, "MSI\n");
3257                 if (!pci_enable_msi(pdev))
3258                         h->msi_vector = 1;
3259                 else
3260                         dev_warn(&pdev->dev, "MSI init failed\n");
3261         }
3262 default_int_mode:
3263 #endif                          /* CONFIG_PCI_MSI */
3264         /* if we get here we're going to use the default interrupt mode */
3265         h->intr[PERF_MODE_INT] = pdev->irq;
3266 }
3267
3268 static int __devinit hpsa_pci_init(struct ctlr_info *h, struct pci_dev *pdev)
3269 {
3270         ushort subsystem_vendor_id, subsystem_device_id, command;
3271         u32 board_id, scratchpad = 0;
3272         u64 cfg_offset;
3273         u32 cfg_base_addr;
3274         u64 cfg_base_addr_index;
3275         u32 trans_offset;
3276         int i, prod_index, err;
3277
3278         subsystem_vendor_id = pdev->subsystem_vendor;
3279         subsystem_device_id = pdev->subsystem_device;
3280         board_id = (((u32) (subsystem_device_id << 16) & 0xffff0000) |
3281                     subsystem_vendor_id);
3282
3283         for (i = 0; i < ARRAY_SIZE(products); i++)
3284                 if (board_id == products[i].board_id)
3285                         break;
3286
3287         prod_index = i;
3288
3289         if (prod_index == ARRAY_SIZE(products)) {
3290                 prod_index--;
3291                 if (subsystem_vendor_id != PCI_VENDOR_ID_HP ||
3292                                 !hpsa_allow_any) {
3293                         dev_warn(&pdev->dev, "unrecognized board ID:"
3294                                 " 0x%08lx, ignoring.\n",
3295                                 (unsigned long) board_id);
3296                         return -ENODEV;
3297                 }
3298         }
3299         /* check to see if controller has been disabled
3300          * BEFORE trying to enable it
3301          */
3302         (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3303         if (!(command & 0x02)) {
3304                 dev_warn(&pdev->dev, "controller appears to be disabled\n");
3305                 return -ENODEV;
3306         }
3307
3308         err = pci_enable_device(pdev);
3309         if (err) {
3310                 dev_warn(&pdev->dev, "unable to enable PCI device\n");
3311                 return err;
3312         }
3313
3314         err = pci_request_regions(pdev, "hpsa");
3315         if (err) {
3316                 dev_err(&pdev->dev, "cannot obtain PCI resources, aborting\n");
3317                 return err;
3318         }
3319
3320         /* If the kernel supports MSI/MSI-X we will try to enable that,
3321          * else we use the IO-APIC interrupt assigned to us by system ROM.
3322          */
3323         hpsa_interrupt_mode(h, pdev, board_id);
3324
3325         /* find the memory BAR */
3326         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3327                 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3328                         break;
3329         }
3330         if (i == DEVICE_COUNT_RESOURCE) {
3331                 dev_warn(&pdev->dev, "no memory BAR found\n");
3332                 err = -ENODEV;
3333                 goto err_out_free_res;
3334         }
3335
3336         h->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3337                                                  * already removed
3338                                                  */
3339
3340         h->vaddr = remap_pci_mem(h->paddr, 0x250);
3341
3342         /* Wait for the board to become ready.  */
3343         for (i = 0; i < HPSA_BOARD_READY_ITERATIONS; i++) {
3344                 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
3345                 if (scratchpad == HPSA_FIRMWARE_READY)
3346                         break;
3347                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
3348         }
3349         if (scratchpad != HPSA_FIRMWARE_READY) {
3350                 dev_warn(&pdev->dev, "board not ready, timed out.\n");
3351                 err = -ENODEV;
3352                 goto err_out_free_res;
3353         }
3354
3355         /* get the address index number */
3356         cfg_base_addr = readl(h->vaddr + SA5_CTCFG_OFFSET);
3357         cfg_base_addr &= (u32) 0x0000ffff;
3358         cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
3359         if (cfg_base_addr_index == -1) {
3360                 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
3361                 err = -ENODEV;
3362                 goto err_out_free_res;
3363         }
3364
3365         cfg_offset = readl(h->vaddr + SA5_CTMEM_OFFSET);
3366         h->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3367                                cfg_base_addr_index) + cfg_offset,
3368                                 sizeof(h->cfgtable));
3369         /* Find performant mode table. */
3370         trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3371         h->transtable = remap_pci_mem(pci_resource_start(pdev,
3372                                 cfg_base_addr_index)+cfg_offset+trans_offset,
3373                                 sizeof(*h->transtable));
3374
3375         h->board_id = board_id;
3376         h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3377         h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
3378
3379         /*
3380          * Limit in-command s/g elements to 32 save dma'able memory.
3381          * Howvever spec says if 0, use 31
3382          */
3383
3384         h->max_cmd_sg_entries = 31;
3385         if (h->maxsgentries > 512) {
3386                 h->max_cmd_sg_entries = 32;
3387                 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
3388                 h->maxsgentries--; /* save one for chain pointer */
3389         } else {
3390                 h->maxsgentries = 31; /* default to traditional values */
3391                 h->chainsize = 0;
3392         }
3393
3394         h->product_name = products[prod_index].product_name;
3395         h->access = *(products[prod_index].access);
3396         /* Allow room for some ioctls */
3397         h->nr_cmds = h->max_commands - 4;
3398
3399         if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
3400             (readb(&h->cfgtable->Signature[1]) != 'I') ||
3401             (readb(&h->cfgtable->Signature[2]) != 'S') ||
3402             (readb(&h->cfgtable->Signature[3]) != 'S')) {
3403                 dev_warn(&pdev->dev, "not a valid CISS config table\n");
3404                 err = -ENODEV;
3405                 goto err_out_free_res;
3406         }
3407 #ifdef CONFIG_X86
3408         {
3409                 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3410                 u32 prefetch;
3411                 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
3412                 prefetch |= 0x100;
3413                 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
3414         }
3415 #endif
3416
3417         /* Disabling DMA prefetch for the P600
3418          * An ASIC bug may result in a prefetch beyond
3419          * physical memory.
3420          */
3421         if (board_id == 0x3225103C) {
3422                 u32 dma_prefetch;
3423                 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
3424                 dma_prefetch |= 0x8000;
3425                 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
3426         }
3427
3428         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3429         /* Update the field, and then ring the doorbell */
3430         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
3431         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3432
3433         /* under certain very rare conditions, this can take awhile.
3434          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3435          * as we enter this code.)
3436          */
3437         for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3438                 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3439                         break;
3440                 /* delay and try again */
3441                 msleep(10);
3442         }
3443
3444 #ifdef HPSA_DEBUG
3445         print_cfg_table(&pdev->dev, h->cfgtable);
3446 #endif                          /* HPSA_DEBUG */
3447
3448         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3449                 dev_warn(&pdev->dev, "unable to get board into simple mode\n");
3450                 err = -ENODEV;
3451                 goto err_out_free_res;
3452         }
3453         return 0;
3454
3455 err_out_free_res:
3456         /*
3457          * Deliberately omit pci_disable_device(): it does something nasty to
3458          * Smart Array controllers that pci_enable_device does not undo
3459          */
3460         pci_release_regions(pdev);
3461         return err;
3462 }
3463
3464 static void __devinit hpsa_hba_inquiry(struct ctlr_info *h)
3465 {
3466         int rc;
3467
3468 #define HBA_INQUIRY_BYTE_COUNT 64
3469         h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
3470         if (!h->hba_inquiry_data)
3471                 return;
3472         rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
3473                 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
3474         if (rc != 0) {
3475                 kfree(h->hba_inquiry_data);
3476                 h->hba_inquiry_data = NULL;
3477         }
3478 }
3479
3480 static int __devinit hpsa_init_one(struct pci_dev *pdev,
3481                                     const struct pci_device_id *ent)
3482 {
3483         int i, rc;
3484         int dac;
3485         struct ctlr_info *h;
3486
3487         if (number_of_controllers == 0)
3488                 printk(KERN_INFO DRIVER_NAME "\n");
3489         if (reset_devices) {
3490                 /* Reset the controller with a PCI power-cycle */
3491                 if (hpsa_hard_reset_controller(pdev) || hpsa_reset_msi(pdev))
3492                         return -ENODEV;
3493
3494                 /* Some devices (notably the HP Smart Array 5i Controller)
3495                    need a little pause here */
3496                 msleep(HPSA_POST_RESET_PAUSE_MSECS);
3497
3498                 /* Now try to get the controller to respond to a no-op */
3499                 for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
3500                         if (hpsa_noop(pdev) == 0)
3501                                 break;
3502                         else
3503                                 dev_warn(&pdev->dev, "no-op failed%s\n",
3504                                                 (i < 11 ? "; re-trying" : ""));
3505                 }
3506         }
3507
3508         /* Command structures must be aligned on a 32-byte boundary because
3509          * the 5 lower bits of the address are used by the hardware. and by
3510          * the driver.  See comments in hpsa.h for more info.
3511          */
3512 #define COMMANDLIST_ALIGNMENT 32
3513         BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
3514         h = kzalloc(sizeof(*h), GFP_KERNEL);
3515         if (!h)
3516                 return -ENOMEM;
3517
3518         h->busy_initializing = 1;
3519         INIT_HLIST_HEAD(&h->cmpQ);
3520         INIT_HLIST_HEAD(&h->reqQ);
3521         rc = hpsa_pci_init(h, pdev);
3522         if (rc != 0)
3523                 goto clean1;
3524
3525         sprintf(h->devname, "hpsa%d", number_of_controllers);
3526         h->ctlr = number_of_controllers;
3527         number_of_controllers++;
3528         h->pdev = pdev;
3529
3530         /* configure PCI DMA stuff */
3531         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3532         if (rc == 0) {
3533                 dac = 1;
3534         } else {
3535                 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3536                 if (rc == 0) {
3537                         dac = 0;
3538                 } else {
3539                         dev_err(&pdev->dev, "no suitable DMA available\n");
3540                         goto clean1;
3541                 }
3542         }
3543
3544         /* make sure the board interrupts are off */
3545         h->access.set_intr_mask(h, HPSA_INTR_OFF);
3546         rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr,
3547                         IRQF_DISABLED, h->devname, h);
3548         if (rc) {
3549                 dev_err(&pdev->dev, "unable to get irq %d for %s\n",
3550                        h->intr[PERF_MODE_INT], h->devname);
3551                 goto clean2;
3552         }
3553
3554         dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
3555                h->devname, pdev->device,
3556                h->intr[PERF_MODE_INT], dac ? "" : " not");
3557
3558         h->cmd_pool_bits =
3559             kmalloc(((h->nr_cmds + BITS_PER_LONG -
3560                       1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
3561         h->cmd_pool = pci_alloc_consistent(h->pdev,
3562                     h->nr_cmds * sizeof(*h->cmd_pool),
3563                     &(h->cmd_pool_dhandle));
3564         h->errinfo_pool = pci_alloc_consistent(h->pdev,
3565                     h->nr_cmds * sizeof(*h->errinfo_pool),
3566                     &(h->errinfo_pool_dhandle));
3567         if ((h->cmd_pool_bits == NULL)
3568             || (h->cmd_pool == NULL)
3569             || (h->errinfo_pool == NULL)) {
3570                 dev_err(&pdev->dev, "out of memory");
3571                 rc = -ENOMEM;
3572                 goto clean4;
3573         }
3574         if (hpsa_allocate_sg_chain_blocks(h))
3575                 goto clean4;
3576         spin_lock_init(&h->lock);
3577         spin_lock_init(&h->scan_lock);
3578         init_waitqueue_head(&h->scan_wait_queue);
3579         h->scan_finished = 1; /* no scan currently in progress */
3580
3581         pci_set_drvdata(pdev, h);
3582         memset(h->cmd_pool_bits, 0,
3583                ((h->nr_cmds + BITS_PER_LONG -
3584                  1) / BITS_PER_LONG) * sizeof(unsigned long));
3585
3586         hpsa_scsi_setup(h);
3587
3588         /* Turn the interrupts on so we can service requests */
3589         h->access.set_intr_mask(h, HPSA_INTR_ON);
3590
3591         hpsa_put_ctlr_into_performant_mode(h);
3592         hpsa_hba_inquiry(h);
3593         hpsa_register_scsi(h);  /* hook ourselves into SCSI subsystem */
3594         h->busy_initializing = 0;
3595         return 1;
3596
3597 clean4:
3598         hpsa_free_sg_chain_blocks(h);
3599         kfree(h->cmd_pool_bits);
3600         if (h->cmd_pool)
3601                 pci_free_consistent(h->pdev,
3602                             h->nr_cmds * sizeof(struct CommandList),
3603                             h->cmd_pool, h->cmd_pool_dhandle);
3604         if (h->errinfo_pool)
3605                 pci_free_consistent(h->pdev,
3606                             h->nr_cmds * sizeof(struct ErrorInfo),
3607                             h->errinfo_pool,
3608                             h->errinfo_pool_dhandle);
3609         free_irq(h->intr[PERF_MODE_INT], h);
3610 clean2:
3611 clean1:
3612         h->busy_initializing = 0;
3613         kfree(h);
3614         return rc;
3615 }
3616
3617 static void hpsa_flush_cache(struct ctlr_info *h)
3618 {
3619         char *flush_buf;
3620         struct CommandList *c;
3621
3622         flush_buf = kzalloc(4, GFP_KERNEL);
3623         if (!flush_buf)
3624                 return;
3625
3626         c = cmd_special_alloc(h);
3627         if (!c) {
3628                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
3629                 goto out_of_memory;
3630         }
3631         fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
3632                 RAID_CTLR_LUNID, TYPE_CMD);
3633         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
3634         if (c->err_info->CommandStatus != 0)
3635                 dev_warn(&h->pdev->dev,
3636                         "error flushing cache on controller\n");
3637         cmd_special_free(h, c);
3638 out_of_memory:
3639         kfree(flush_buf);
3640 }
3641
3642 static void hpsa_shutdown(struct pci_dev *pdev)
3643 {
3644         struct ctlr_info *h;
3645
3646         h = pci_get_drvdata(pdev);
3647         /* Turn board interrupts off  and send the flush cache command
3648          * sendcmd will turn off interrupt, and send the flush...
3649          * To write all data in the battery backed cache to disks
3650          */
3651         hpsa_flush_cache(h);
3652         h->access.set_intr_mask(h, HPSA_INTR_OFF);
3653         free_irq(h->intr[PERF_MODE_INT], h);
3654 #ifdef CONFIG_PCI_MSI
3655         if (h->msix_vector)
3656                 pci_disable_msix(h->pdev);
3657         else if (h->msi_vector)
3658                 pci_disable_msi(h->pdev);
3659 #endif                          /* CONFIG_PCI_MSI */
3660 }
3661
3662 static void __devexit hpsa_remove_one(struct pci_dev *pdev)
3663 {
3664         struct ctlr_info *h;
3665
3666         if (pci_get_drvdata(pdev) == NULL) {
3667                 dev_err(&pdev->dev, "unable to remove device \n");
3668                 return;
3669         }
3670         h = pci_get_drvdata(pdev);
3671         hpsa_unregister_scsi(h);        /* unhook from SCSI subsystem */
3672         hpsa_shutdown(pdev);
3673         iounmap(h->vaddr);
3674         hpsa_free_sg_chain_blocks(h);
3675         pci_free_consistent(h->pdev,
3676                 h->nr_cmds * sizeof(struct CommandList),
3677                 h->cmd_pool, h->cmd_pool_dhandle);
3678         pci_free_consistent(h->pdev,
3679                 h->nr_cmds * sizeof(struct ErrorInfo),
3680                 h->errinfo_pool, h->errinfo_pool_dhandle);
3681         pci_free_consistent(h->pdev, h->reply_pool_size,
3682                 h->reply_pool, h->reply_pool_dhandle);
3683         kfree(h->cmd_pool_bits);
3684         kfree(h->blockFetchTable);
3685         kfree(h->hba_inquiry_data);
3686         /*
3687          * Deliberately omit pci_disable_device(): it does something nasty to
3688          * Smart Array controllers that pci_enable_device does not undo
3689          */
3690         pci_release_regions(pdev);
3691         pci_set_drvdata(pdev, NULL);
3692         kfree(h);
3693 }
3694
3695 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
3696         __attribute__((unused)) pm_message_t state)
3697 {
3698         return -ENOSYS;
3699 }
3700
3701 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
3702 {
3703         return -ENOSYS;
3704 }
3705
3706 static struct pci_driver hpsa_pci_driver = {
3707         .name = "hpsa",
3708         .probe = hpsa_init_one,
3709         .remove = __devexit_p(hpsa_remove_one),
3710         .id_table = hpsa_pci_device_id, /* id_table */
3711         .shutdown = hpsa_shutdown,
3712         .suspend = hpsa_suspend,
3713         .resume = hpsa_resume,
3714 };
3715
3716 /* Fill in bucket_map[], given nsgs (the max number of
3717  * scatter gather elements supported) and bucket[],
3718  * which is an array of 8 integers.  The bucket[] array
3719  * contains 8 different DMA transfer sizes (in 16
3720  * byte increments) which the controller uses to fetch
3721  * commands.  This function fills in bucket_map[], which
3722  * maps a given number of scatter gather elements to one of
3723  * the 8 DMA transfer sizes.  The point of it is to allow the
3724  * controller to only do as much DMA as needed to fetch the
3725  * command, with the DMA transfer size encoded in the lower
3726  * bits of the command address.
3727  */
3728 static void  calc_bucket_map(int bucket[], int num_buckets,
3729         int nsgs, int *bucket_map)
3730 {
3731         int i, j, b, size;
3732
3733         /* even a command with 0 SGs requires 4 blocks */
3734 #define MINIMUM_TRANSFER_BLOCKS 4
3735 #define NUM_BUCKETS 8
3736         /* Note, bucket_map must have nsgs+1 entries. */
3737         for (i = 0; i <= nsgs; i++) {
3738                 /* Compute size of a command with i SG entries */
3739                 size = i + MINIMUM_TRANSFER_BLOCKS;
3740                 b = num_buckets; /* Assume the biggest bucket */
3741                 /* Find the bucket that is just big enough */
3742                 for (j = 0; j < 8; j++) {
3743                         if (bucket[j] >= size) {
3744                                 b = j;
3745                                 break;
3746                         }
3747                 }
3748                 /* for a command with i SG entries, use bucket b. */
3749                 bucket_map[i] = b;
3750         }
3751 }
3752
3753 static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
3754 {
3755         u32 trans_support;
3756         u64 trans_offset;
3757         /*  5 = 1 s/g entry or 4k
3758          *  6 = 2 s/g entry or 8k
3759          *  8 = 4 s/g entry or 16k
3760          * 10 = 6 s/g entry or 24k
3761          */
3762         int bft[8] = {5, 6, 8, 10, 12, 20, 28, 35}; /* for scatter/gathers */
3763         int i = 0;
3764         int l = 0;
3765         unsigned long register_value;
3766
3767         trans_support = readl(&(h->cfgtable->TransportSupport));
3768         if (!(trans_support & PERFORMANT_MODE))
3769                 return;
3770
3771         h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3772         h->max_sg_entries = 32;
3773         /* Performant mode ring buffer and supporting data structures */
3774         h->reply_pool_size = h->max_commands * sizeof(u64);
3775         h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
3776                                 &(h->reply_pool_dhandle));
3777
3778         /* Need a block fetch table for performant mode */
3779         h->blockFetchTable = kmalloc(((h->max_sg_entries+1) *
3780                                 sizeof(u32)), GFP_KERNEL);
3781
3782         if ((h->reply_pool == NULL)
3783                 || (h->blockFetchTable == NULL))
3784                 goto clean_up;
3785
3786         h->reply_pool_wraparound = 1; /* spec: init to 1 */
3787
3788         /* Controller spec: zero out this buffer. */
3789         memset(h->reply_pool, 0, h->reply_pool_size);
3790         h->reply_pool_head = h->reply_pool;
3791
3792         trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3793         bft[7] = h->max_sg_entries + 4;
3794         calc_bucket_map(bft, ARRAY_SIZE(bft), 32, h->blockFetchTable);
3795         for (i = 0; i < 8; i++)
3796                 writel(bft[i], &h->transtable->BlockFetch[i]);
3797
3798         /* size of controller ring buffer */
3799         writel(h->max_commands, &h->transtable->RepQSize);
3800         writel(1, &h->transtable->RepQCount);
3801         writel(0, &h->transtable->RepQCtrAddrLow32);
3802         writel(0, &h->transtable->RepQCtrAddrHigh32);
3803         writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3804         writel(0, &h->transtable->RepQAddr0High32);
3805         writel(CFGTBL_Trans_Performant,
3806                 &(h->cfgtable->HostWrite.TransportRequest));
3807         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3808         /* under certain very rare conditions, this can take awhile.
3809          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3810          * as we enter this code.) */
3811         for (l = 0; l < MAX_CONFIG_WAIT; l++) {
3812                 register_value = readl(h->vaddr + SA5_DOORBELL);
3813                 if (!(register_value & CFGTBL_ChangeReq))
3814                         break;
3815                 /* delay and try again */
3816                 set_current_state(TASK_INTERRUPTIBLE);
3817                 schedule_timeout(10);
3818         }
3819         register_value = readl(&(h->cfgtable->TransportActive));
3820         if (!(register_value & CFGTBL_Trans_Performant)) {
3821                 dev_warn(&h->pdev->dev, "unable to get board into"
3822                                         " performant mode\n");
3823                 return;
3824         }
3825
3826         /* Change the access methods to the performant access methods */
3827         h->access = SA5_performant_access;
3828         h->transMethod = CFGTBL_Trans_Performant;
3829
3830         return;
3831
3832 clean_up:
3833         if (h->reply_pool)
3834                 pci_free_consistent(h->pdev, h->reply_pool_size,
3835                         h->reply_pool, h->reply_pool_dhandle);
3836         kfree(h->blockFetchTable);
3837 }
3838
3839 /*
3840  *  This is it.  Register the PCI driver information for the cards we control
3841  *  the OS will call our registered routines when it finds one of our cards.
3842  */
3843 static int __init hpsa_init(void)
3844 {
3845         return pci_register_driver(&hpsa_pci_driver);
3846 }
3847
3848 static void __exit hpsa_cleanup(void)
3849 {
3850         pci_unregister_driver(&hpsa_pci_driver);
3851 }
3852
3853 module_init(hpsa_init);
3854 module_exit(hpsa_cleanup);