2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
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.
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. See the GNU
12 * General Public License for more details.
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., 59 Temple Place, Suite 330, Boston, MA
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
23 #include <linux/module.h>
24 #include <linux/interrupt.h>
25 #include <linux/types.h>
26 #include <linux/pci.h>
27 #include <linux/kernel.h>
28 #include <linux/slab.h>
29 #include <linux/smp_lock.h>
30 #include <linux/delay.h>
31 #include <linux/major.h>
33 #include <linux/bio.h>
34 #include <linux/blkpg.h>
35 #include <linux/timer.h>
36 #include <linux/proc_fs.h>
37 #include <linux/seq_file.h>
38 #include <linux/init.h>
39 #include <linux/jiffies.h>
40 #include <linux/hdreg.h>
41 #include <linux/spinlock.h>
42 #include <linux/compat.h>
43 #include <linux/mutex.h>
44 #include <asm/uaccess.h>
47 #include <linux/dma-mapping.h>
48 #include <linux/blkdev.h>
49 #include <linux/genhd.h>
50 #include <linux/completion.h>
51 #include <scsi/scsi.h>
53 #include <scsi/scsi_ioctl.h>
54 #include <linux/cdrom.h>
55 #include <linux/scatterlist.h>
56 #include <linux/kthread.h>
58 #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
59 #define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60 #define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
62 /* Embedded module documentation macros - see modules.h */
63 MODULE_AUTHOR("Hewlett-Packard Company");
64 MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
65 MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68 MODULE_VERSION("3.6.20");
69 MODULE_LICENSE("GPL");
71 static int cciss_allow_hpsa;
72 module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
73 MODULE_PARM_DESC(cciss_allow_hpsa,
74 "Prevent cciss driver from accessing hardware known to be "
75 " supported by the hpsa driver");
77 #include "cciss_cmd.h"
79 #include <linux/cciss_ioctl.h>
81 /* define the PCI info for the cards we can control */
82 static const struct pci_device_id cciss_pci_device_id[] = {
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
90 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
91 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
113 MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
115 /* board_id = Subsystem Device ID & Vendor ID
116 * product = Marketing Name for the board
117 * access = Address of the struct of function pointers
119 static struct board_type products[] = {
120 {0x40700E11, "Smart Array 5300", &SA5_access},
121 {0x40800E11, "Smart Array 5i", &SA5B_access},
122 {0x40820E11, "Smart Array 532", &SA5B_access},
123 {0x40830E11, "Smart Array 5312", &SA5B_access},
124 {0x409A0E11, "Smart Array 641", &SA5_access},
125 {0x409B0E11, "Smart Array 642", &SA5_access},
126 {0x409C0E11, "Smart Array 6400", &SA5_access},
127 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
128 {0x40910E11, "Smart Array 6i", &SA5_access},
129 {0x3225103C, "Smart Array P600", &SA5_access},
130 {0x3235103C, "Smart Array P400i", &SA5_access},
131 {0x3211103C, "Smart Array E200i", &SA5_access},
132 {0x3212103C, "Smart Array E200", &SA5_access},
133 {0x3213103C, "Smart Array E200i", &SA5_access},
134 {0x3214103C, "Smart Array E200i", &SA5_access},
135 {0x3215103C, "Smart Array E200i", &SA5_access},
136 {0x3237103C, "Smart Array E500", &SA5_access},
137 /* controllers below this line are also supported by the hpsa driver. */
138 #define HPSA_BOUNDARY 0x3223103C
139 {0x3223103C, "Smart Array P800", &SA5_access},
140 {0x3234103C, "Smart Array P400", &SA5_access},
141 {0x323D103C, "Smart Array P700m", &SA5_access},
142 {0x3241103C, "Smart Array P212", &SA5_access},
143 {0x3243103C, "Smart Array P410", &SA5_access},
144 {0x3245103C, "Smart Array P410i", &SA5_access},
145 {0x3247103C, "Smart Array P411", &SA5_access},
146 {0x3249103C, "Smart Array P812", &SA5_access},
147 {0x324A103C, "Smart Array P712m", &SA5_access},
148 {0x324B103C, "Smart Array P711m", &SA5_access},
151 /* How long to wait (in milliseconds) for board to go into simple mode */
152 #define MAX_CONFIG_WAIT 30000
153 #define MAX_IOCTL_CONFIG_WAIT 1000
155 /*define how many times we will try a command because of bus resets */
156 #define MAX_CMD_RETRIES 3
160 /* Originally cciss driver only supports 8 major numbers */
161 #define MAX_CTLR_ORIG 8
163 static ctlr_info_t *hba[MAX_CTLR];
165 static struct task_struct *cciss_scan_thread;
166 static DEFINE_MUTEX(scan_mutex);
167 static LIST_HEAD(scan_q);
169 static void do_cciss_request(struct request_queue *q);
170 static irqreturn_t do_cciss_intx(int irq, void *dev_id);
171 static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id);
172 static int cciss_open(struct block_device *bdev, fmode_t mode);
173 static int cciss_release(struct gendisk *disk, fmode_t mode);
174 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
175 unsigned int cmd, unsigned long arg);
176 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
178 static int cciss_revalidate(struct gendisk *disk);
179 static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
180 static int deregister_disk(ctlr_info_t *h, int drv_index,
181 int clear_all, int via_ioctl);
183 static void cciss_read_capacity(int ctlr, int logvol,
184 sector_t *total_size, unsigned int *block_size);
185 static void cciss_read_capacity_16(int ctlr, int logvol,
186 sector_t *total_size, unsigned int *block_size);
187 static void cciss_geometry_inquiry(int ctlr, int logvol,
189 unsigned int block_size, InquiryData_struct *inq_buff,
190 drive_info_struct *drv);
191 static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
193 static void start_io(ctlr_info_t *h);
194 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
195 __u8 page_code, unsigned char scsi3addr[],
197 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
199 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
201 static int add_to_scan_list(struct ctlr_info *h);
202 static int scan_thread(void *data);
203 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
204 static void cciss_hba_release(struct device *dev);
205 static void cciss_device_release(struct device *dev);
206 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
207 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
209 #ifdef CONFIG_PROC_FS
210 static void cciss_procinit(int i);
212 static void cciss_procinit(int i)
215 #endif /* CONFIG_PROC_FS */
218 static int cciss_compat_ioctl(struct block_device *, fmode_t,
219 unsigned, unsigned long);
222 static const struct block_device_operations cciss_fops = {
223 .owner = THIS_MODULE,
225 .release = cciss_release,
226 .locked_ioctl = cciss_ioctl,
227 .getgeo = cciss_getgeo,
229 .compat_ioctl = cciss_compat_ioctl,
231 .revalidate_disk = cciss_revalidate,
235 * Enqueuing and dequeuing functions for cmdlists.
237 static inline void addQ(struct hlist_head *list, CommandList_struct *c)
239 hlist_add_head(&c->list, list);
242 static inline void removeQ(CommandList_struct *c)
245 * After kexec/dump some commands might still
246 * be in flight, which the firmware will try
247 * to complete. Resetting the firmware doesn't work
248 * with old fw revisions, so we have to mark
249 * them off as 'stale' to prevent the driver from
252 if (WARN_ON(hlist_unhashed(&c->list))) {
253 c->cmd_type = CMD_MSG_STALE;
257 hlist_del_init(&c->list);
260 static void enqueue_cmd_and_start_io(ctlr_info_t *h,
261 CommandList_struct *c)
264 spin_lock_irqsave(&h->lock, flags);
268 spin_unlock_irqrestore(&h->lock, flags);
271 static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list,
278 for (i = 0; i < nr_cmds; i++) {
279 kfree(cmd_sg_list[i]);
280 cmd_sg_list[i] = NULL;
285 static SGDescriptor_struct **cciss_allocate_sg_chain_blocks(
286 ctlr_info_t *h, int chainsize, int nr_cmds)
289 SGDescriptor_struct **cmd_sg_list;
294 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL);
298 /* Build up chain blocks for each command */
299 for (j = 0; j < nr_cmds; j++) {
300 /* Need a block of chainsized s/g elements. */
301 cmd_sg_list[j] = kmalloc((chainsize *
302 sizeof(*cmd_sg_list[j])), GFP_KERNEL);
303 if (!cmd_sg_list[j]) {
304 dev_err(&h->pdev->dev, "Cannot get memory "
305 "for s/g chains.\n");
311 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds);
315 static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c)
317 SGDescriptor_struct *chain_sg;
320 if (c->Header.SGTotal <= h->max_cmd_sgentries)
323 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
324 temp64.val32.lower = chain_sg->Addr.lower;
325 temp64.val32.upper = chain_sg->Addr.upper;
326 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
329 static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c,
330 SGDescriptor_struct *chain_block, int len)
332 SGDescriptor_struct *chain_sg;
335 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
336 chain_sg->Ext = CCISS_SG_CHAIN;
338 temp64.val = pci_map_single(h->pdev, chain_block, len,
340 chain_sg->Addr.lower = temp64.val32.lower;
341 chain_sg->Addr.upper = temp64.val32.upper;
344 #include "cciss_scsi.c" /* For SCSI tape support */
346 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
349 #define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
351 #ifdef CONFIG_PROC_FS
354 * Report information about this controller.
356 #define ENG_GIG 1000000000
357 #define ENG_GIG_FACTOR (ENG_GIG/512)
358 #define ENGAGE_SCSI "engage scsi"
360 static struct proc_dir_entry *proc_cciss;
362 static void cciss_seq_show_header(struct seq_file *seq)
364 ctlr_info_t *h = seq->private;
366 seq_printf(seq, "%s: HP %s Controller\n"
367 "Board ID: 0x%08lx\n"
368 "Firmware Version: %c%c%c%c\n"
370 "Logical drives: %d\n"
371 "Current Q depth: %d\n"
372 "Current # commands on controller: %d\n"
373 "Max Q depth since init: %d\n"
374 "Max # commands on controller since init: %d\n"
375 "Max SG entries since init: %d\n",
378 (unsigned long)h->board_id,
379 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
380 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
382 h->Qdepth, h->commands_outstanding,
383 h->maxQsinceinit, h->max_outstanding, h->maxSG);
385 #ifdef CONFIG_CISS_SCSI_TAPE
386 cciss_seq_tape_report(seq, h->ctlr);
387 #endif /* CONFIG_CISS_SCSI_TAPE */
390 static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
392 ctlr_info_t *h = seq->private;
393 unsigned ctlr = h->ctlr;
396 /* prevent displaying bogus info during configuration
397 * or deconfiguration of a logical volume
399 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
400 if (h->busy_configuring) {
401 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
402 return ERR_PTR(-EBUSY);
404 h->busy_configuring = 1;
405 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
408 cciss_seq_show_header(seq);
413 static int cciss_seq_show(struct seq_file *seq, void *v)
415 sector_t vol_sz, vol_sz_frac;
416 ctlr_info_t *h = seq->private;
417 unsigned ctlr = h->ctlr;
419 drive_info_struct *drv = h->drv[*pos];
421 if (*pos > h->highest_lun)
424 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
430 vol_sz = drv->nr_blocks;
431 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
433 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
435 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
436 drv->raid_level = RAID_UNKNOWN;
437 seq_printf(seq, "cciss/c%dd%d:"
438 "\t%4u.%02uGB\tRAID %s\n",
439 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
440 raid_label[drv->raid_level]);
444 static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
446 ctlr_info_t *h = seq->private;
448 if (*pos > h->highest_lun)
455 static void cciss_seq_stop(struct seq_file *seq, void *v)
457 ctlr_info_t *h = seq->private;
459 /* Only reset h->busy_configuring if we succeeded in setting
460 * it during cciss_seq_start. */
461 if (v == ERR_PTR(-EBUSY))
464 h->busy_configuring = 0;
467 static const struct seq_operations cciss_seq_ops = {
468 .start = cciss_seq_start,
469 .show = cciss_seq_show,
470 .next = cciss_seq_next,
471 .stop = cciss_seq_stop,
474 static int cciss_seq_open(struct inode *inode, struct file *file)
476 int ret = seq_open(file, &cciss_seq_ops);
477 struct seq_file *seq = file->private_data;
480 seq->private = PDE(inode)->data;
486 cciss_proc_write(struct file *file, const char __user *buf,
487 size_t length, loff_t *ppos)
492 #ifndef CONFIG_CISS_SCSI_TAPE
496 if (!buf || length > PAGE_SIZE - 1)
499 buffer = (char *)__get_free_page(GFP_KERNEL);
504 if (copy_from_user(buffer, buf, length))
506 buffer[length] = '\0';
508 #ifdef CONFIG_CISS_SCSI_TAPE
509 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
510 struct seq_file *seq = file->private_data;
511 ctlr_info_t *h = seq->private;
513 err = cciss_engage_scsi(h->ctlr);
517 #endif /* CONFIG_CISS_SCSI_TAPE */
519 /* might be nice to have "disengage" too, but it's not
520 safely possible. (only 1 module use count, lock issues.) */
523 free_page((unsigned long)buffer);
527 static const struct file_operations cciss_proc_fops = {
528 .owner = THIS_MODULE,
529 .open = cciss_seq_open,
532 .release = seq_release,
533 .write = cciss_proc_write,
536 static void __devinit cciss_procinit(int i)
538 struct proc_dir_entry *pde;
540 if (proc_cciss == NULL)
541 proc_cciss = proc_mkdir("driver/cciss", NULL);
544 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
546 &cciss_proc_fops, hba[i]);
548 #endif /* CONFIG_PROC_FS */
550 #define MAX_PRODUCT_NAME_LEN 19
552 #define to_hba(n) container_of(n, struct ctlr_info, dev)
553 #define to_drv(n) container_of(n, drive_info_struct, dev)
555 static ssize_t host_store_rescan(struct device *dev,
556 struct device_attribute *attr,
557 const char *buf, size_t count)
559 struct ctlr_info *h = to_hba(dev);
562 wake_up_process(cciss_scan_thread);
563 wait_for_completion_interruptible(&h->scan_wait);
567 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
569 static ssize_t dev_show_unique_id(struct device *dev,
570 struct device_attribute *attr,
573 drive_info_struct *drv = to_drv(dev);
574 struct ctlr_info *h = to_hba(drv->dev.parent);
579 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
580 if (h->busy_configuring)
583 memcpy(sn, drv->serial_no, sizeof(sn));
584 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
589 return snprintf(buf, 16 * 2 + 2,
590 "%02X%02X%02X%02X%02X%02X%02X%02X"
591 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
592 sn[0], sn[1], sn[2], sn[3],
593 sn[4], sn[5], sn[6], sn[7],
594 sn[8], sn[9], sn[10], sn[11],
595 sn[12], sn[13], sn[14], sn[15]);
597 static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
599 static ssize_t dev_show_vendor(struct device *dev,
600 struct device_attribute *attr,
603 drive_info_struct *drv = to_drv(dev);
604 struct ctlr_info *h = to_hba(drv->dev.parent);
605 char vendor[VENDOR_LEN + 1];
609 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
610 if (h->busy_configuring)
613 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
614 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
619 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
621 static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
623 static ssize_t dev_show_model(struct device *dev,
624 struct device_attribute *attr,
627 drive_info_struct *drv = to_drv(dev);
628 struct ctlr_info *h = to_hba(drv->dev.parent);
629 char model[MODEL_LEN + 1];
633 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
634 if (h->busy_configuring)
637 memcpy(model, drv->model, MODEL_LEN + 1);
638 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
643 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
645 static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
647 static ssize_t dev_show_rev(struct device *dev,
648 struct device_attribute *attr,
651 drive_info_struct *drv = to_drv(dev);
652 struct ctlr_info *h = to_hba(drv->dev.parent);
653 char rev[REV_LEN + 1];
657 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
658 if (h->busy_configuring)
661 memcpy(rev, drv->rev, REV_LEN + 1);
662 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
667 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
669 static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
671 static ssize_t cciss_show_lunid(struct device *dev,
672 struct device_attribute *attr, char *buf)
674 drive_info_struct *drv = to_drv(dev);
675 struct ctlr_info *h = to_hba(drv->dev.parent);
677 unsigned char lunid[8];
679 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
680 if (h->busy_configuring) {
681 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
685 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
688 memcpy(lunid, drv->LunID, sizeof(lunid));
689 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
690 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
691 lunid[0], lunid[1], lunid[2], lunid[3],
692 lunid[4], lunid[5], lunid[6], lunid[7]);
694 static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
696 static ssize_t cciss_show_raid_level(struct device *dev,
697 struct device_attribute *attr, char *buf)
699 drive_info_struct *drv = to_drv(dev);
700 struct ctlr_info *h = to_hba(drv->dev.parent);
704 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
705 if (h->busy_configuring) {
706 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
709 raid = drv->raid_level;
710 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
711 if (raid < 0 || raid > RAID_UNKNOWN)
714 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
717 static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
719 static ssize_t cciss_show_usage_count(struct device *dev,
720 struct device_attribute *attr, char *buf)
722 drive_info_struct *drv = to_drv(dev);
723 struct ctlr_info *h = to_hba(drv->dev.parent);
727 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
728 if (h->busy_configuring) {
729 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
732 count = drv->usage_count;
733 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
734 return snprintf(buf, 20, "%d\n", count);
736 static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
738 static struct attribute *cciss_host_attrs[] = {
739 &dev_attr_rescan.attr,
743 static struct attribute_group cciss_host_attr_group = {
744 .attrs = cciss_host_attrs,
747 static const struct attribute_group *cciss_host_attr_groups[] = {
748 &cciss_host_attr_group,
752 static struct device_type cciss_host_type = {
753 .name = "cciss_host",
754 .groups = cciss_host_attr_groups,
755 .release = cciss_hba_release,
758 static struct attribute *cciss_dev_attrs[] = {
759 &dev_attr_unique_id.attr,
760 &dev_attr_model.attr,
761 &dev_attr_vendor.attr,
763 &dev_attr_lunid.attr,
764 &dev_attr_raid_level.attr,
765 &dev_attr_usage_count.attr,
769 static struct attribute_group cciss_dev_attr_group = {
770 .attrs = cciss_dev_attrs,
773 static const struct attribute_group *cciss_dev_attr_groups[] = {
774 &cciss_dev_attr_group,
778 static struct device_type cciss_dev_type = {
779 .name = "cciss_device",
780 .groups = cciss_dev_attr_groups,
781 .release = cciss_device_release,
784 static struct bus_type cciss_bus_type = {
789 * cciss_hba_release is called when the reference count
790 * of h->dev goes to zero.
792 static void cciss_hba_release(struct device *dev)
795 * nothing to do, but need this to avoid a warning
796 * about not having a release handler from lib/kref.c.
801 * Initialize sysfs entry for each controller. This sets up and registers
802 * the 'cciss#' directory for each individual controller under
803 * /sys/bus/pci/devices/<dev>/.
805 static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
807 device_initialize(&h->dev);
808 h->dev.type = &cciss_host_type;
809 h->dev.bus = &cciss_bus_type;
810 dev_set_name(&h->dev, "%s", h->devname);
811 h->dev.parent = &h->pdev->dev;
813 return device_add(&h->dev);
817 * Remove sysfs entries for an hba.
819 static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
822 put_device(&h->dev); /* final put. */
825 /* cciss_device_release is called when the reference count
826 * of h->drv[x]dev goes to zero.
828 static void cciss_device_release(struct device *dev)
830 drive_info_struct *drv = to_drv(dev);
835 * Initialize sysfs for each logical drive. This sets up and registers
836 * the 'c#d#' directory for each individual logical drive under
837 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
838 * /sys/block/cciss!c#d# to this entry.
840 static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
845 if (h->drv[drv_index]->device_initialized)
848 dev = &h->drv[drv_index]->dev;
849 device_initialize(dev);
850 dev->type = &cciss_dev_type;
851 dev->bus = &cciss_bus_type;
852 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
853 dev->parent = &h->dev;
854 h->drv[drv_index]->device_initialized = 1;
855 return device_add(dev);
859 * Remove sysfs entries for a logical drive.
861 static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
864 struct device *dev = &h->drv[drv_index]->dev;
866 /* special case for c*d0, we only destroy it on controller exit */
867 if (drv_index == 0 && !ctlr_exiting)
871 put_device(dev); /* the "final" put. */
872 h->drv[drv_index] = NULL;
876 * For operations that cannot sleep, a command block is allocated at init,
877 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
878 * which ones are free or in use. For operations that can wait for kmalloc
879 * to possible sleep, this routine can be called with get_from_pool set to 0.
880 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
882 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
884 CommandList_struct *c;
887 dma_addr_t cmd_dma_handle, err_dma_handle;
889 if (!get_from_pool) {
890 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
891 sizeof(CommandList_struct), &cmd_dma_handle);
894 memset(c, 0, sizeof(CommandList_struct));
898 c->err_info = (ErrorInfo_struct *)
899 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
902 if (c->err_info == NULL) {
903 pci_free_consistent(h->pdev,
904 sizeof(CommandList_struct), c, cmd_dma_handle);
907 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
908 } else { /* get it out of the controllers pool */
911 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
914 } while (test_and_set_bit
915 (i & (BITS_PER_LONG - 1),
916 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
918 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
921 memset(c, 0, sizeof(CommandList_struct));
922 cmd_dma_handle = h->cmd_pool_dhandle
923 + i * sizeof(CommandList_struct);
924 c->err_info = h->errinfo_pool + i;
925 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
926 err_dma_handle = h->errinfo_pool_dhandle
927 + i * sizeof(ErrorInfo_struct);
933 INIT_HLIST_NODE(&c->list);
934 c->busaddr = (__u32) cmd_dma_handle;
935 temp64.val = (__u64) err_dma_handle;
936 c->ErrDesc.Addr.lower = temp64.val32.lower;
937 c->ErrDesc.Addr.upper = temp64.val32.upper;
938 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
945 * Frees a command block that was previously allocated with cmd_alloc().
947 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
952 if (!got_from_pool) {
953 temp64.val32.lower = c->ErrDesc.Addr.lower;
954 temp64.val32.upper = c->ErrDesc.Addr.upper;
955 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
956 c->err_info, (dma_addr_t) temp64.val);
957 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
958 c, (dma_addr_t) c->busaddr);
961 clear_bit(i & (BITS_PER_LONG - 1),
962 h->cmd_pool_bits + (i / BITS_PER_LONG));
967 static inline ctlr_info_t *get_host(struct gendisk *disk)
969 return disk->queue->queuedata;
972 static inline drive_info_struct *get_drv(struct gendisk *disk)
974 return disk->private_data;
978 * Open. Make sure the device is really there.
980 static int cciss_open(struct block_device *bdev, fmode_t mode)
982 ctlr_info_t *host = get_host(bdev->bd_disk);
983 drive_info_struct *drv = get_drv(bdev->bd_disk);
986 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
987 #endif /* CCISS_DEBUG */
989 if (drv->busy_configuring)
992 * Root is allowed to open raw volume zero even if it's not configured
993 * so array config can still work. Root is also allowed to open any
994 * volume that has a LUN ID, so it can issue IOCTL to reread the
995 * disk information. I don't think I really like this
996 * but I'm already using way to many device nodes to claim another one
997 * for "raw controller".
999 if (drv->heads == 0) {
1000 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1001 /* if not node 0 make sure it is a partition = 0 */
1002 if (MINOR(bdev->bd_dev) & 0x0f) {
1004 /* if it is, make sure we have a LUN ID */
1005 } else if (memcmp(drv->LunID, CTLR_LUNID,
1006 sizeof(drv->LunID))) {
1010 if (!capable(CAP_SYS_ADMIN))
1014 host->usage_count++;
1019 * Close. Sync first.
1021 static int cciss_release(struct gendisk *disk, fmode_t mode)
1023 ctlr_info_t *host = get_host(disk);
1024 drive_info_struct *drv = get_drv(disk);
1027 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
1028 #endif /* CCISS_DEBUG */
1031 host->usage_count--;
1035 #ifdef CONFIG_COMPAT
1037 static int do_ioctl(struct block_device *bdev, fmode_t mode,
1038 unsigned cmd, unsigned long arg)
1042 ret = cciss_ioctl(bdev, mode, cmd, arg);
1047 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1048 unsigned cmd, unsigned long arg);
1049 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1050 unsigned cmd, unsigned long arg);
1052 static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1053 unsigned cmd, unsigned long arg)
1056 case CCISS_GETPCIINFO:
1057 case CCISS_GETINTINFO:
1058 case CCISS_SETINTINFO:
1059 case CCISS_GETNODENAME:
1060 case CCISS_SETNODENAME:
1061 case CCISS_GETHEARTBEAT:
1062 case CCISS_GETBUSTYPES:
1063 case CCISS_GETFIRMVER:
1064 case CCISS_GETDRIVVER:
1065 case CCISS_REVALIDVOLS:
1066 case CCISS_DEREGDISK:
1067 case CCISS_REGNEWDISK:
1069 case CCISS_RESCANDISK:
1070 case CCISS_GETLUNINFO:
1071 return do_ioctl(bdev, mode, cmd, arg);
1073 case CCISS_PASSTHRU32:
1074 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1075 case CCISS_BIG_PASSTHRU32:
1076 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1079 return -ENOIOCTLCMD;
1083 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1084 unsigned cmd, unsigned long arg)
1086 IOCTL32_Command_struct __user *arg32 =
1087 (IOCTL32_Command_struct __user *) arg;
1088 IOCTL_Command_struct arg64;
1089 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1095 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1096 sizeof(arg64.LUN_info));
1098 copy_from_user(&arg64.Request, &arg32->Request,
1099 sizeof(arg64.Request));
1101 copy_from_user(&arg64.error_info, &arg32->error_info,
1102 sizeof(arg64.error_info));
1103 err |= get_user(arg64.buf_size, &arg32->buf_size);
1104 err |= get_user(cp, &arg32->buf);
1105 arg64.buf = compat_ptr(cp);
1106 err |= copy_to_user(p, &arg64, sizeof(arg64));
1111 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1115 copy_in_user(&arg32->error_info, &p->error_info,
1116 sizeof(arg32->error_info));
1122 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1123 unsigned cmd, unsigned long arg)
1125 BIG_IOCTL32_Command_struct __user *arg32 =
1126 (BIG_IOCTL32_Command_struct __user *) arg;
1127 BIG_IOCTL_Command_struct arg64;
1128 BIG_IOCTL_Command_struct __user *p =
1129 compat_alloc_user_space(sizeof(arg64));
1135 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1136 sizeof(arg64.LUN_info));
1138 copy_from_user(&arg64.Request, &arg32->Request,
1139 sizeof(arg64.Request));
1141 copy_from_user(&arg64.error_info, &arg32->error_info,
1142 sizeof(arg64.error_info));
1143 err |= get_user(arg64.buf_size, &arg32->buf_size);
1144 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1145 err |= get_user(cp, &arg32->buf);
1146 arg64.buf = compat_ptr(cp);
1147 err |= copy_to_user(p, &arg64, sizeof(arg64));
1152 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1156 copy_in_user(&arg32->error_info, &p->error_info,
1157 sizeof(arg32->error_info));
1164 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1166 drive_info_struct *drv = get_drv(bdev->bd_disk);
1168 if (!drv->cylinders)
1171 geo->heads = drv->heads;
1172 geo->sectors = drv->sectors;
1173 geo->cylinders = drv->cylinders;
1177 static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1179 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1180 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1181 (void)check_for_unit_attention(host, c);
1186 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
1187 unsigned int cmd, unsigned long arg)
1189 struct gendisk *disk = bdev->bd_disk;
1190 ctlr_info_t *host = get_host(disk);
1191 drive_info_struct *drv = get_drv(disk);
1192 int ctlr = host->ctlr;
1193 void __user *argp = (void __user *)arg;
1196 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
1197 #endif /* CCISS_DEBUG */
1200 case CCISS_GETPCIINFO:
1202 cciss_pci_info_struct pciinfo;
1206 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1207 pciinfo.bus = host->pdev->bus->number;
1208 pciinfo.dev_fn = host->pdev->devfn;
1209 pciinfo.board_id = host->board_id;
1211 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1215 case CCISS_GETINTINFO:
1217 cciss_coalint_struct intinfo;
1221 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1223 readl(&host->cfgtable->HostWrite.CoalIntCount);
1225 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1229 case CCISS_SETINTINFO:
1231 cciss_coalint_struct intinfo;
1232 unsigned long flags;
1237 if (!capable(CAP_SYS_ADMIN))
1240 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1242 if ((intinfo.delay == 0) && (intinfo.count == 0))
1244 // printk("cciss_ioctl: delay and count cannot be 0\n");
1247 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1248 /* Update the field, and then ring the doorbell */
1249 writel(intinfo.delay,
1250 &(host->cfgtable->HostWrite.CoalIntDelay));
1251 writel(intinfo.count,
1252 &(host->cfgtable->HostWrite.CoalIntCount));
1253 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1255 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1256 if (!(readl(host->vaddr + SA5_DOORBELL)
1257 & CFGTBL_ChangeReq))
1259 /* delay and try again */
1262 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1263 if (i >= MAX_IOCTL_CONFIG_WAIT)
1267 case CCISS_GETNODENAME:
1269 NodeName_type NodeName;
1274 for (i = 0; i < 16; i++)
1276 readb(&host->cfgtable->ServerName[i]);
1277 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1281 case CCISS_SETNODENAME:
1283 NodeName_type NodeName;
1284 unsigned long flags;
1289 if (!capable(CAP_SYS_ADMIN))
1293 (NodeName, argp, sizeof(NodeName_type)))
1296 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1298 /* Update the field, and then ring the doorbell */
1299 for (i = 0; i < 16; i++)
1301 &host->cfgtable->ServerName[i]);
1303 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1305 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1306 if (!(readl(host->vaddr + SA5_DOORBELL)
1307 & CFGTBL_ChangeReq))
1309 /* delay and try again */
1312 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1313 if (i >= MAX_IOCTL_CONFIG_WAIT)
1318 case CCISS_GETHEARTBEAT:
1320 Heartbeat_type heartbeat;
1324 heartbeat = readl(&host->cfgtable->HeartBeat);
1326 (argp, &heartbeat, sizeof(Heartbeat_type)))
1330 case CCISS_GETBUSTYPES:
1332 BusTypes_type BusTypes;
1336 BusTypes = readl(&host->cfgtable->BusTypes);
1338 (argp, &BusTypes, sizeof(BusTypes_type)))
1342 case CCISS_GETFIRMVER:
1344 FirmwareVer_type firmware;
1348 memcpy(firmware, host->firm_ver, 4);
1351 (argp, firmware, sizeof(FirmwareVer_type)))
1355 case CCISS_GETDRIVVER:
1357 DriverVer_type DriverVer = DRIVER_VERSION;
1363 (argp, &DriverVer, sizeof(DriverVer_type)))
1368 case CCISS_DEREGDISK:
1370 case CCISS_REVALIDVOLS:
1371 return rebuild_lun_table(host, 0, 1);
1373 case CCISS_GETLUNINFO:{
1374 LogvolInfo_struct luninfo;
1376 memcpy(&luninfo.LunID, drv->LunID,
1377 sizeof(luninfo.LunID));
1378 luninfo.num_opens = drv->usage_count;
1379 luninfo.num_parts = 0;
1380 if (copy_to_user(argp, &luninfo,
1381 sizeof(LogvolInfo_struct)))
1385 case CCISS_PASSTHRU:
1387 IOCTL_Command_struct iocommand;
1388 CommandList_struct *c;
1391 DECLARE_COMPLETION_ONSTACK(wait);
1396 if (!capable(CAP_SYS_RAWIO))
1400 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1402 if ((iocommand.buf_size < 1) &&
1403 (iocommand.Request.Type.Direction != XFER_NONE)) {
1406 #if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1407 /* Check kmalloc limits */
1408 if (iocommand.buf_size > 128000)
1411 if (iocommand.buf_size > 0) {
1412 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1416 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1417 /* Copy the data into the buffer we created */
1419 (buff, iocommand.buf, iocommand.buf_size)) {
1424 memset(buff, 0, iocommand.buf_size);
1426 if ((c = cmd_alloc(host, 0)) == NULL) {
1430 /* Fill in the command type */
1431 c->cmd_type = CMD_IOCTL_PEND;
1432 /* Fill in Command Header */
1433 c->Header.ReplyQueue = 0; /* unused in simple mode */
1434 if (iocommand.buf_size > 0) /* buffer to fill */
1436 c->Header.SGList = 1;
1437 c->Header.SGTotal = 1;
1438 } else /* no buffers to fill */
1440 c->Header.SGList = 0;
1441 c->Header.SGTotal = 0;
1443 c->Header.LUN = iocommand.LUN_info;
1444 /* use the kernel address the cmd block for tag */
1445 c->Header.Tag.lower = c->busaddr;
1447 /* Fill in Request block */
1448 c->Request = iocommand.Request;
1450 /* Fill in the scatter gather information */
1451 if (iocommand.buf_size > 0) {
1452 temp64.val = pci_map_single(host->pdev, buff,
1454 PCI_DMA_BIDIRECTIONAL);
1455 c->SG[0].Addr.lower = temp64.val32.lower;
1456 c->SG[0].Addr.upper = temp64.val32.upper;
1457 c->SG[0].Len = iocommand.buf_size;
1458 c->SG[0].Ext = 0; /* we are not chaining */
1462 enqueue_cmd_and_start_io(host, c);
1463 wait_for_completion(&wait);
1465 /* unlock the buffers from DMA */
1466 temp64.val32.lower = c->SG[0].Addr.lower;
1467 temp64.val32.upper = c->SG[0].Addr.upper;
1468 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1470 PCI_DMA_BIDIRECTIONAL);
1472 check_ioctl_unit_attention(host, c);
1474 /* Copy the error information out */
1475 iocommand.error_info = *(c->err_info);
1477 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1479 cmd_free(host, c, 0);
1483 if (iocommand.Request.Type.Direction == XFER_READ) {
1484 /* Copy the data out of the buffer we created */
1486 (iocommand.buf, buff, iocommand.buf_size)) {
1488 cmd_free(host, c, 0);
1493 cmd_free(host, c, 0);
1496 case CCISS_BIG_PASSTHRU:{
1497 BIG_IOCTL_Command_struct *ioc;
1498 CommandList_struct *c;
1499 unsigned char **buff = NULL;
1500 int *buff_size = NULL;
1505 DECLARE_COMPLETION_ONSTACK(wait);
1508 BYTE __user *data_ptr;
1512 if (!capable(CAP_SYS_RAWIO))
1514 ioc = (BIG_IOCTL_Command_struct *)
1515 kmalloc(sizeof(*ioc), GFP_KERNEL);
1520 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1524 if ((ioc->buf_size < 1) &&
1525 (ioc->Request.Type.Direction != XFER_NONE)) {
1529 /* Check kmalloc limits using all SGs */
1530 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1534 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1539 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1544 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
1550 left = ioc->buf_size;
1551 data_ptr = ioc->buf;
1554 ioc->malloc_size) ? ioc->
1556 buff_size[sg_used] = sz;
1557 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1558 if (buff[sg_used] == NULL) {
1562 if (ioc->Request.Type.Direction == XFER_WRITE) {
1564 (buff[sg_used], data_ptr, sz)) {
1569 memset(buff[sg_used], 0, sz);
1575 if ((c = cmd_alloc(host, 0)) == NULL) {
1579 c->cmd_type = CMD_IOCTL_PEND;
1580 c->Header.ReplyQueue = 0;
1582 if (ioc->buf_size > 0) {
1583 c->Header.SGList = sg_used;
1584 c->Header.SGTotal = sg_used;
1586 c->Header.SGList = 0;
1587 c->Header.SGTotal = 0;
1589 c->Header.LUN = ioc->LUN_info;
1590 c->Header.Tag.lower = c->busaddr;
1592 c->Request = ioc->Request;
1593 if (ioc->buf_size > 0) {
1594 for (i = 0; i < sg_used; i++) {
1596 pci_map_single(host->pdev, buff[i],
1598 PCI_DMA_BIDIRECTIONAL);
1599 c->SG[i].Addr.lower =
1601 c->SG[i].Addr.upper =
1603 c->SG[i].Len = buff_size[i];
1604 c->SG[i].Ext = 0; /* we are not chaining */
1608 enqueue_cmd_and_start_io(host, c);
1609 wait_for_completion(&wait);
1610 /* unlock the buffers from DMA */
1611 for (i = 0; i < sg_used; i++) {
1612 temp64.val32.lower = c->SG[i].Addr.lower;
1613 temp64.val32.upper = c->SG[i].Addr.upper;
1614 pci_unmap_single(host->pdev,
1615 (dma_addr_t) temp64.val, buff_size[i],
1616 PCI_DMA_BIDIRECTIONAL);
1618 check_ioctl_unit_attention(host, c);
1619 /* Copy the error information out */
1620 ioc->error_info = *(c->err_info);
1621 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1622 cmd_free(host, c, 0);
1626 if (ioc->Request.Type.Direction == XFER_READ) {
1627 /* Copy the data out of the buffer we created */
1628 BYTE __user *ptr = ioc->buf;
1629 for (i = 0; i < sg_used; i++) {
1631 (ptr, buff[i], buff_size[i])) {
1632 cmd_free(host, c, 0);
1636 ptr += buff_size[i];
1639 cmd_free(host, c, 0);
1643 for (i = 0; i < sg_used; i++)
1652 /* scsi_cmd_ioctl handles these, below, though some are not */
1653 /* very meaningful for cciss. SG_IO is the main one people want. */
1655 case SG_GET_VERSION_NUM:
1656 case SG_SET_TIMEOUT:
1657 case SG_GET_TIMEOUT:
1658 case SG_GET_RESERVED_SIZE:
1659 case SG_SET_RESERVED_SIZE:
1660 case SG_EMULATED_HOST:
1662 case SCSI_IOCTL_SEND_COMMAND:
1663 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
1665 /* scsi_cmd_ioctl would normally handle these, below, but */
1666 /* they aren't a good fit for cciss, as CD-ROMs are */
1667 /* not supported, and we don't have any bus/target/lun */
1668 /* which we present to the kernel. */
1670 case CDROM_SEND_PACKET:
1671 case CDROMCLOSETRAY:
1673 case SCSI_IOCTL_GET_IDLUN:
1674 case SCSI_IOCTL_GET_BUS_NUMBER:
1680 static void cciss_check_queues(ctlr_info_t *h)
1682 int start_queue = h->next_to_run;
1685 /* check to see if we have maxed out the number of commands that can
1686 * be placed on the queue. If so then exit. We do this check here
1687 * in case the interrupt we serviced was from an ioctl and did not
1688 * free any new commands.
1690 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
1693 /* We have room on the queue for more commands. Now we need to queue
1694 * them up. We will also keep track of the next queue to run so
1695 * that every queue gets a chance to be started first.
1697 for (i = 0; i < h->highest_lun + 1; i++) {
1698 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1699 /* make sure the disk has been added and the drive is real
1700 * because this can be called from the middle of init_one.
1702 if (!h->drv[curr_queue])
1704 if (!(h->drv[curr_queue]->queue) ||
1705 !(h->drv[curr_queue]->heads))
1707 blk_start_queue(h->gendisk[curr_queue]->queue);
1709 /* check to see if we have maxed out the number of commands
1710 * that can be placed on the queue.
1712 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
1713 if (curr_queue == start_queue) {
1715 (start_queue + 1) % (h->highest_lun + 1);
1718 h->next_to_run = curr_queue;
1725 static void cciss_softirq_done(struct request *rq)
1727 CommandList_struct *cmd = rq->completion_data;
1728 ctlr_info_t *h = hba[cmd->ctlr];
1729 SGDescriptor_struct *curr_sg = cmd->SG;
1731 unsigned long flags;
1735 if (cmd->Request.Type.Direction == XFER_READ)
1736 ddir = PCI_DMA_FROMDEVICE;
1738 ddir = PCI_DMA_TODEVICE;
1740 /* command did not need to be retried */
1741 /* unmap the DMA mapping for all the scatter gather elements */
1742 for (i = 0; i < cmd->Header.SGList; i++) {
1743 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
1744 cciss_unmap_sg_chain_block(h, cmd);
1745 /* Point to the next block */
1746 curr_sg = h->cmd_sg_list[cmd->cmdindex];
1749 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1750 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1751 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1757 printk("Done with %p\n", rq);
1758 #endif /* CCISS_DEBUG */
1760 /* set the residual count for pc requests */
1761 if (blk_pc_request(rq))
1762 rq->resid_len = cmd->err_info->ResidualCnt;
1764 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
1766 spin_lock_irqsave(&h->lock, flags);
1767 cmd_free(h, cmd, 1);
1768 cciss_check_queues(h);
1769 spin_unlock_irqrestore(&h->lock, flags);
1772 static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1773 unsigned char scsi3addr[], uint32_t log_unit)
1775 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1776 sizeof(h->drv[log_unit]->LunID));
1779 /* This function gets the SCSI vendor, model, and revision of a logical drive
1780 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1781 * they cannot be read.
1783 static void cciss_get_device_descr(int ctlr, int logvol,
1784 char *vendor, char *model, char *rev)
1787 InquiryData_struct *inq_buf;
1788 unsigned char scsi3addr[8];
1794 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1798 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1799 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1800 scsi3addr, TYPE_CMD);
1802 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1803 vendor[VENDOR_LEN] = '\0';
1804 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1805 model[MODEL_LEN] = '\0';
1806 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1807 rev[REV_LEN] = '\0';
1814 /* This function gets the serial number of a logical drive via
1815 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1816 * number cannot be had, for whatever reason, 16 bytes of 0xff
1817 * are returned instead.
1819 static void cciss_get_serial_no(int ctlr, int logvol,
1820 unsigned char *serial_no, int buflen)
1822 #define PAGE_83_INQ_BYTES 64
1825 unsigned char scsi3addr[8];
1829 memset(serial_no, 0xff, buflen);
1830 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1833 memset(serial_no, 0, buflen);
1834 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1835 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1836 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
1838 memcpy(serial_no, &buf[8], buflen);
1844 * cciss_add_disk sets up the block device queue for a logical drive
1846 static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1849 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1851 goto init_queue_failure;
1852 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1853 disk->major = h->major;
1854 disk->first_minor = drv_index << NWD_SHIFT;
1855 disk->fops = &cciss_fops;
1856 if (cciss_create_ld_sysfs_entry(h, drv_index))
1858 disk->private_data = h->drv[drv_index];
1859 disk->driverfs_dev = &h->drv[drv_index]->dev;
1861 /* Set up queue information */
1862 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1864 /* This is a hardware imposed limit. */
1865 blk_queue_max_segments(disk->queue, h->maxsgentries);
1867 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
1869 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1871 disk->queue->queuedata = h;
1873 blk_queue_logical_block_size(disk->queue,
1874 h->drv[drv_index]->block_size);
1876 /* Make sure all queue data is written out before */
1877 /* setting h->drv[drv_index]->queue, as setting this */
1878 /* allows the interrupt handler to start the queue */
1880 h->drv[drv_index]->queue = disk->queue;
1885 blk_cleanup_queue(disk->queue);
1891 /* This function will check the usage_count of the drive to be updated/added.
1892 * If the usage_count is zero and it is a heretofore unknown drive, or,
1893 * the drive's capacity, geometry, or serial number has changed,
1894 * then the drive information will be updated and the disk will be
1895 * re-registered with the kernel. If these conditions don't hold,
1896 * then it will be left alone for the next reboot. The exception to this
1897 * is disk 0 which will always be left registered with the kernel since it
1898 * is also the controller node. Any changes to disk 0 will show up on
1901 static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1904 ctlr_info_t *h = hba[ctlr];
1905 struct gendisk *disk;
1906 InquiryData_struct *inq_buff = NULL;
1907 unsigned int block_size;
1908 sector_t total_size;
1909 unsigned long flags = 0;
1911 drive_info_struct *drvinfo;
1913 /* Get information about the disk and modify the driver structure */
1914 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1915 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
1916 if (inq_buff == NULL || drvinfo == NULL)
1919 /* testing to see if 16-byte CDBs are already being used */
1920 if (h->cciss_read == CCISS_READ_16) {
1921 cciss_read_capacity_16(h->ctlr, drv_index,
1922 &total_size, &block_size);
1925 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
1926 /* if read_capacity returns all F's this volume is >2TB */
1927 /* in size so we switch to 16-byte CDB's for all */
1928 /* read/write ops */
1929 if (total_size == 0xFFFFFFFFULL) {
1930 cciss_read_capacity_16(ctlr, drv_index,
1931 &total_size, &block_size);
1932 h->cciss_read = CCISS_READ_16;
1933 h->cciss_write = CCISS_WRITE_16;
1935 h->cciss_read = CCISS_READ_10;
1936 h->cciss_write = CCISS_WRITE_10;
1940 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
1942 drvinfo->block_size = block_size;
1943 drvinfo->nr_blocks = total_size + 1;
1945 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
1946 drvinfo->model, drvinfo->rev);
1947 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
1948 sizeof(drvinfo->serial_no));
1949 /* Save the lunid in case we deregister the disk, below. */
1950 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1951 sizeof(drvinfo->LunID));
1953 /* Is it the same disk we already know, and nothing's changed? */
1954 if (h->drv[drv_index]->raid_level != -1 &&
1955 ((memcmp(drvinfo->serial_no,
1956 h->drv[drv_index]->serial_no, 16) == 0) &&
1957 drvinfo->block_size == h->drv[drv_index]->block_size &&
1958 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1959 drvinfo->heads == h->drv[drv_index]->heads &&
1960 drvinfo->sectors == h->drv[drv_index]->sectors &&
1961 drvinfo->cylinders == h->drv[drv_index]->cylinders))
1962 /* The disk is unchanged, nothing to update */
1965 /* If we get here it's not the same disk, or something's changed,
1966 * so we need to * deregister it, and re-register it, if it's not
1968 * If the disk already exists then deregister it before proceeding
1969 * (unless it's the first disk (for the controller node).
1971 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
1972 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
1973 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1974 h->drv[drv_index]->busy_configuring = 1;
1975 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1977 /* deregister_disk sets h->drv[drv_index]->queue = NULL
1978 * which keeps the interrupt handler from starting
1981 ret = deregister_disk(h, drv_index, 0, via_ioctl);
1984 /* If the disk is in use return */
1988 /* Save the new information from cciss_geometry_inquiry
1989 * and serial number inquiry. If the disk was deregistered
1990 * above, then h->drv[drv_index] will be NULL.
1992 if (h->drv[drv_index] == NULL) {
1993 drvinfo->device_initialized = 0;
1994 h->drv[drv_index] = drvinfo;
1995 drvinfo = NULL; /* so it won't be freed below. */
1997 /* special case for cxd0 */
1998 h->drv[drv_index]->block_size = drvinfo->block_size;
1999 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2000 h->drv[drv_index]->heads = drvinfo->heads;
2001 h->drv[drv_index]->sectors = drvinfo->sectors;
2002 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2003 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2004 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2005 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2007 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2008 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2012 disk = h->gendisk[drv_index];
2013 set_capacity(disk, h->drv[drv_index]->nr_blocks);
2015 /* If it's not disk 0 (drv_index != 0)
2016 * or if it was disk 0, but there was previously
2017 * no actual corresponding configured logical drive
2018 * (raid_leve == -1) then we want to update the
2019 * logical drive's information.
2021 if (drv_index || first_time) {
2022 if (cciss_add_disk(h, disk, drv_index) != 0) {
2023 cciss_free_gendisk(h, drv_index);
2024 cciss_free_drive_info(h, drv_index);
2025 printk(KERN_WARNING "cciss:%d could not update "
2026 "disk %d\n", h->ctlr, drv_index);
2036 printk(KERN_ERR "cciss: out of memory\n");
2040 /* This function will find the first index of the controllers drive array
2041 * that has a null drv pointer and allocate the drive info struct and
2042 * will return that index This is where new drives will be added.
2043 * If the index to be returned is greater than the highest_lun index for
2044 * the controller then highest_lun is set * to this new index.
2045 * If there are no available indexes or if tha allocation fails, then -1
2046 * is returned. * "controller_node" is used to know if this is a real
2047 * logical drive, or just the controller node, which determines if this
2048 * counts towards highest_lun.
2050 static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
2053 drive_info_struct *drv;
2055 /* Search for an empty slot for our drive info */
2056 for (i = 0; i < CISS_MAX_LUN; i++) {
2058 /* if not cxd0 case, and it's occupied, skip it. */
2059 if (h->drv[i] && i != 0)
2062 * If it's cxd0 case, and drv is alloc'ed already, and a
2063 * disk is configured there, skip it.
2065 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2069 * We've found an empty slot. Update highest_lun
2070 * provided this isn't just the fake cxd0 controller node.
2072 if (i > h->highest_lun && !controller_node)
2075 /* If adding a real disk at cxd0, and it's already alloc'ed */
2076 if (i == 0 && h->drv[i] != NULL)
2080 * Found an empty slot, not already alloc'ed. Allocate it.
2081 * Mark it with raid_level == -1, so we know it's new later on.
2083 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2086 drv->raid_level = -1; /* so we know it's new */
2093 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2095 kfree(h->drv[drv_index]);
2096 h->drv[drv_index] = NULL;
2099 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2101 put_disk(h->gendisk[drv_index]);
2102 h->gendisk[drv_index] = NULL;
2105 /* cciss_add_gendisk finds a free hba[]->drv structure
2106 * and allocates a gendisk if needed, and sets the lunid
2107 * in the drvinfo structure. It returns the index into
2108 * the ->drv[] array, or -1 if none are free.
2109 * is_controller_node indicates whether highest_lun should
2110 * count this disk, or if it's only being added to provide
2111 * a means to talk to the controller in case no logical
2112 * drives have yet been configured.
2114 static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2115 int controller_node)
2119 drv_index = cciss_alloc_drive_info(h, controller_node);
2120 if (drv_index == -1)
2123 /*Check if the gendisk needs to be allocated */
2124 if (!h->gendisk[drv_index]) {
2125 h->gendisk[drv_index] =
2126 alloc_disk(1 << NWD_SHIFT);
2127 if (!h->gendisk[drv_index]) {
2128 printk(KERN_ERR "cciss%d: could not "
2129 "allocate a new disk %d\n",
2130 h->ctlr, drv_index);
2131 goto err_free_drive_info;
2134 memcpy(h->drv[drv_index]->LunID, lunid,
2135 sizeof(h->drv[drv_index]->LunID));
2136 if (cciss_create_ld_sysfs_entry(h, drv_index))
2138 /* Don't need to mark this busy because nobody */
2139 /* else knows about this disk yet to contend */
2140 /* for access to it. */
2141 h->drv[drv_index]->busy_configuring = 0;
2146 cciss_free_gendisk(h, drv_index);
2147 err_free_drive_info:
2148 cciss_free_drive_info(h, drv_index);
2152 /* This is for the special case of a controller which
2153 * has no logical drives. In this case, we still need
2154 * to register a disk so the controller can be accessed
2155 * by the Array Config Utility.
2157 static void cciss_add_controller_node(ctlr_info_t *h)
2159 struct gendisk *disk;
2162 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2165 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
2166 if (drv_index == -1)
2168 h->drv[drv_index]->block_size = 512;
2169 h->drv[drv_index]->nr_blocks = 0;
2170 h->drv[drv_index]->heads = 0;
2171 h->drv[drv_index]->sectors = 0;
2172 h->drv[drv_index]->cylinders = 0;
2173 h->drv[drv_index]->raid_level = -1;
2174 memset(h->drv[drv_index]->serial_no, 0, 16);
2175 disk = h->gendisk[drv_index];
2176 if (cciss_add_disk(h, disk, drv_index) == 0)
2178 cciss_free_gendisk(h, drv_index);
2179 cciss_free_drive_info(h, drv_index);
2181 printk(KERN_WARNING "cciss%d: could not "
2182 "add disk 0.\n", h->ctlr);
2186 /* This function will add and remove logical drives from the Logical
2187 * drive array of the controller and maintain persistency of ordering
2188 * so that mount points are preserved until the next reboot. This allows
2189 * for the removal of logical drives in the middle of the drive array
2190 * without a re-ordering of those drives.
2192 * h = The controller to perform the operations on
2194 static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2199 ReportLunData_struct *ld_buff = NULL;
2205 unsigned char lunid[8] = CTLR_LUNID;
2206 unsigned long flags;
2208 if (!capable(CAP_SYS_RAWIO))
2211 /* Set busy_configuring flag for this operation */
2212 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2213 if (h->busy_configuring) {
2214 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2217 h->busy_configuring = 1;
2218 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2220 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2221 if (ld_buff == NULL)
2224 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
2225 sizeof(ReportLunData_struct),
2226 0, CTLR_LUNID, TYPE_CMD);
2228 if (return_code == IO_OK)
2229 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2230 else { /* reading number of logical volumes failed */
2231 printk(KERN_WARNING "cciss: report logical volume"
2232 " command failed\n");
2237 num_luns = listlength / 8; /* 8 bytes per entry */
2238 if (num_luns > CISS_MAX_LUN) {
2239 num_luns = CISS_MAX_LUN;
2240 printk(KERN_WARNING "cciss: more luns configured"
2241 " on controller than can be handled by"
2246 cciss_add_controller_node(h);
2248 /* Compare controller drive array to driver's drive array
2249 * to see if any drives are missing on the controller due
2250 * to action of Array Config Utility (user deletes drive)
2251 * and deregister logical drives which have disappeared.
2253 for (i = 0; i <= h->highest_lun; i++) {
2257 /* skip holes in the array from already deleted drives */
2258 if (h->drv[i] == NULL)
2261 for (j = 0; j < num_luns; j++) {
2262 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2263 if (memcmp(h->drv[i]->LunID, lunid,
2264 sizeof(lunid)) == 0) {
2270 /* Deregister it from the OS, it's gone. */
2271 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2272 h->drv[i]->busy_configuring = 1;
2273 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2274 return_code = deregister_disk(h, i, 1, via_ioctl);
2275 if (h->drv[i] != NULL)
2276 h->drv[i]->busy_configuring = 0;
2280 /* Compare controller drive array to driver's drive array.
2281 * Check for updates in the drive information and any new drives
2282 * on the controller due to ACU adding logical drives, or changing
2283 * a logical drive's size, etc. Reregister any new/changed drives
2285 for (i = 0; i < num_luns; i++) {
2290 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
2291 /* Find if the LUN is already in the drive array
2292 * of the driver. If so then update its info
2293 * if not in use. If it does not exist then find
2294 * the first free index and add it.
2296 for (j = 0; j <= h->highest_lun; j++) {
2297 if (h->drv[j] != NULL &&
2298 memcmp(h->drv[j]->LunID, lunid,
2299 sizeof(h->drv[j]->LunID)) == 0) {
2306 /* check if the drive was found already in the array */
2308 drv_index = cciss_add_gendisk(h, lunid, 0);
2309 if (drv_index == -1)
2312 cciss_update_drive_info(ctlr, drv_index, first_time,
2318 h->busy_configuring = 0;
2319 /* We return -1 here to tell the ACU that we have registered/updated
2320 * all of the drives that we can and to keep it from calling us
2325 printk(KERN_ERR "cciss: out of memory\n");
2326 h->busy_configuring = 0;
2330 static void cciss_clear_drive_info(drive_info_struct *drive_info)
2332 /* zero out the disk size info */
2333 drive_info->nr_blocks = 0;
2334 drive_info->block_size = 0;
2335 drive_info->heads = 0;
2336 drive_info->sectors = 0;
2337 drive_info->cylinders = 0;
2338 drive_info->raid_level = -1;
2339 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2340 memset(drive_info->model, 0, sizeof(drive_info->model));
2341 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2342 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2344 * don't clear the LUNID though, we need to remember which
2349 /* This function will deregister the disk and it's queue from the
2350 * kernel. It must be called with the controller lock held and the
2351 * drv structures busy_configuring flag set. It's parameters are:
2353 * disk = This is the disk to be deregistered
2354 * drv = This is the drive_info_struct associated with the disk to be
2355 * deregistered. It contains information about the disk used
2357 * clear_all = This flag determines whether or not the disk information
2358 * is going to be completely cleared out and the highest_lun
2359 * reset. Sometimes we want to clear out information about
2360 * the disk in preparation for re-adding it. In this case
2361 * the highest_lun should be left unchanged and the LunID
2362 * should not be cleared.
2364 * This indicates whether we've reached this path via ioctl.
2365 * This affects the maximum usage count allowed for c0d0 to be messed with.
2366 * If this path is reached via ioctl(), then the max_usage_count will
2367 * be 1, as the process calling ioctl() has got to have the device open.
2368 * If we get here via sysfs, then the max usage count will be zero.
2370 static int deregister_disk(ctlr_info_t *h, int drv_index,
2371 int clear_all, int via_ioctl)
2374 struct gendisk *disk;
2375 drive_info_struct *drv;
2376 int recalculate_highest_lun;
2378 if (!capable(CAP_SYS_RAWIO))
2381 drv = h->drv[drv_index];
2382 disk = h->gendisk[drv_index];
2384 /* make sure logical volume is NOT is use */
2385 if (clear_all || (h->gendisk[0] == disk)) {
2386 if (drv->usage_count > via_ioctl)
2388 } else if (drv->usage_count > 0)
2391 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2393 /* invalidate the devices and deregister the disk. If it is disk
2394 * zero do not deregister it but just zero out it's values. This
2395 * allows us to delete disk zero but keep the controller registered.
2397 if (h->gendisk[0] != disk) {
2398 struct request_queue *q = disk->queue;
2399 if (disk->flags & GENHD_FL_UP) {
2400 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
2404 blk_cleanup_queue(q);
2405 /* If clear_all is set then we are deleting the logical
2406 * drive, not just refreshing its info. For drives
2407 * other than disk 0 we will call put_disk. We do not
2408 * do this for disk 0 as we need it to be able to
2409 * configure the controller.
2412 /* This isn't pretty, but we need to find the
2413 * disk in our array and NULL our the pointer.
2414 * This is so that we will call alloc_disk if
2415 * this index is used again later.
2417 for (i=0; i < CISS_MAX_LUN; i++){
2418 if (h->gendisk[i] == disk) {
2419 h->gendisk[i] = NULL;
2426 set_capacity(disk, 0);
2427 cciss_clear_drive_info(drv);
2432 /* if it was the last disk, find the new hightest lun */
2433 if (clear_all && recalculate_highest_lun) {
2434 int newhighest = -1;
2435 for (i = 0; i <= h->highest_lun; i++) {
2436 /* if the disk has size > 0, it is available */
2437 if (h->drv[i] && h->drv[i]->heads)
2440 h->highest_lun = newhighest;
2445 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2446 size_t size, __u8 page_code, unsigned char *scsi3addr,
2449 ctlr_info_t *h = hba[ctlr];
2450 u64bit buff_dma_handle;
2453 c->cmd_type = CMD_IOCTL_PEND;
2454 c->Header.ReplyQueue = 0;
2456 c->Header.SGList = 1;
2457 c->Header.SGTotal = 1;
2459 c->Header.SGList = 0;
2460 c->Header.SGTotal = 0;
2462 c->Header.Tag.lower = c->busaddr;
2463 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2465 c->Request.Type.Type = cmd_type;
2466 if (cmd_type == TYPE_CMD) {
2469 /* are we trying to read a vital product page */
2470 if (page_code != 0) {
2471 c->Request.CDB[1] = 0x01;
2472 c->Request.CDB[2] = page_code;
2474 c->Request.CDBLen = 6;
2475 c->Request.Type.Attribute = ATTR_SIMPLE;
2476 c->Request.Type.Direction = XFER_READ;
2477 c->Request.Timeout = 0;
2478 c->Request.CDB[0] = CISS_INQUIRY;
2479 c->Request.CDB[4] = size & 0xFF;
2481 case CISS_REPORT_LOG:
2482 case CISS_REPORT_PHYS:
2483 /* Talking to controller so It's a physical command
2484 mode = 00 target = 0. Nothing to write.
2486 c->Request.CDBLen = 12;
2487 c->Request.Type.Attribute = ATTR_SIMPLE;
2488 c->Request.Type.Direction = XFER_READ;
2489 c->Request.Timeout = 0;
2490 c->Request.CDB[0] = cmd;
2491 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2492 c->Request.CDB[7] = (size >> 16) & 0xFF;
2493 c->Request.CDB[8] = (size >> 8) & 0xFF;
2494 c->Request.CDB[9] = size & 0xFF;
2497 case CCISS_READ_CAPACITY:
2498 c->Request.CDBLen = 10;
2499 c->Request.Type.Attribute = ATTR_SIMPLE;
2500 c->Request.Type.Direction = XFER_READ;
2501 c->Request.Timeout = 0;
2502 c->Request.CDB[0] = cmd;
2504 case CCISS_READ_CAPACITY_16:
2505 c->Request.CDBLen = 16;
2506 c->Request.Type.Attribute = ATTR_SIMPLE;
2507 c->Request.Type.Direction = XFER_READ;
2508 c->Request.Timeout = 0;
2509 c->Request.CDB[0] = cmd;
2510 c->Request.CDB[1] = 0x10;
2511 c->Request.CDB[10] = (size >> 24) & 0xFF;
2512 c->Request.CDB[11] = (size >> 16) & 0xFF;
2513 c->Request.CDB[12] = (size >> 8) & 0xFF;
2514 c->Request.CDB[13] = size & 0xFF;
2515 c->Request.Timeout = 0;
2516 c->Request.CDB[0] = cmd;
2518 case CCISS_CACHE_FLUSH:
2519 c->Request.CDBLen = 12;
2520 c->Request.Type.Attribute = ATTR_SIMPLE;
2521 c->Request.Type.Direction = XFER_WRITE;
2522 c->Request.Timeout = 0;
2523 c->Request.CDB[0] = BMIC_WRITE;
2524 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2526 case TEST_UNIT_READY:
2527 c->Request.CDBLen = 6;
2528 c->Request.Type.Attribute = ATTR_SIMPLE;
2529 c->Request.Type.Direction = XFER_NONE;
2530 c->Request.Timeout = 0;
2534 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
2537 } else if (cmd_type == TYPE_MSG) {
2539 case 0: /* ABORT message */
2540 c->Request.CDBLen = 12;
2541 c->Request.Type.Attribute = ATTR_SIMPLE;
2542 c->Request.Type.Direction = XFER_WRITE;
2543 c->Request.Timeout = 0;
2544 c->Request.CDB[0] = cmd; /* abort */
2545 c->Request.CDB[1] = 0; /* abort a command */
2546 /* buff contains the tag of the command to abort */
2547 memcpy(&c->Request.CDB[4], buff, 8);
2549 case 1: /* RESET message */
2550 c->Request.CDBLen = 16;
2551 c->Request.Type.Attribute = ATTR_SIMPLE;
2552 c->Request.Type.Direction = XFER_NONE;
2553 c->Request.Timeout = 0;
2554 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
2555 c->Request.CDB[0] = cmd; /* reset */
2556 c->Request.CDB[1] = 0x03; /* reset a target */
2558 case 3: /* No-Op message */
2559 c->Request.CDBLen = 1;
2560 c->Request.Type.Attribute = ATTR_SIMPLE;
2561 c->Request.Type.Direction = XFER_WRITE;
2562 c->Request.Timeout = 0;
2563 c->Request.CDB[0] = cmd;
2567 "cciss%d: unknown message type %d\n", ctlr, cmd);
2572 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
2575 /* Fill in the scatter gather information */
2577 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
2579 PCI_DMA_BIDIRECTIONAL);
2580 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2581 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2582 c->SG[0].Len = size;
2583 c->SG[0].Ext = 0; /* we are not chaining */
2588 static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2590 switch (c->err_info->ScsiStatus) {
2593 case SAM_STAT_CHECK_CONDITION:
2594 switch (0xf & c->err_info->SenseInfo[2]) {
2595 case 0: return IO_OK; /* no sense */
2596 case 1: return IO_OK; /* recovered error */
2598 if (check_for_unit_attention(h, c))
2599 return IO_NEEDS_RETRY;
2600 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2601 "check condition, sense key = 0x%02x\n",
2602 h->ctlr, c->Request.CDB[0],
2603 c->err_info->SenseInfo[2]);
2607 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2608 "scsi status = 0x%02x\n", h->ctlr,
2609 c->Request.CDB[0], c->err_info->ScsiStatus);
2615 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
2617 int return_status = IO_OK;
2619 if (c->err_info->CommandStatus == CMD_SUCCESS)
2622 switch (c->err_info->CommandStatus) {
2623 case CMD_TARGET_STATUS:
2624 return_status = check_target_status(h, c);
2626 case CMD_DATA_UNDERRUN:
2627 case CMD_DATA_OVERRUN:
2628 /* expected for inquiry and report lun commands */
2631 printk(KERN_WARNING "cciss: cmd 0x%02x is "
2632 "reported invalid\n", c->Request.CDB[0]);
2633 return_status = IO_ERROR;
2635 case CMD_PROTOCOL_ERR:
2636 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2637 "protocol error \n", c->Request.CDB[0]);
2638 return_status = IO_ERROR;
2640 case CMD_HARDWARE_ERR:
2641 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2642 " hardware error\n", c->Request.CDB[0]);
2643 return_status = IO_ERROR;
2645 case CMD_CONNECTION_LOST:
2646 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2647 "connection lost\n", c->Request.CDB[0]);
2648 return_status = IO_ERROR;
2651 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2652 "aborted\n", c->Request.CDB[0]);
2653 return_status = IO_ERROR;
2655 case CMD_ABORT_FAILED:
2656 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2657 "abort failed\n", c->Request.CDB[0]);
2658 return_status = IO_ERROR;
2660 case CMD_UNSOLICITED_ABORT:
2662 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2664 return_status = IO_NEEDS_RETRY;
2667 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2668 "unknown status %x\n", c->Request.CDB[0],
2669 c->err_info->CommandStatus);
2670 return_status = IO_ERROR;
2672 return return_status;
2675 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2678 DECLARE_COMPLETION_ONSTACK(wait);
2679 u64bit buff_dma_handle;
2680 int return_status = IO_OK;
2684 enqueue_cmd_and_start_io(h, c);
2686 wait_for_completion(&wait);
2688 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2691 return_status = process_sendcmd_error(h, c);
2693 if (return_status == IO_NEEDS_RETRY &&
2694 c->retry_count < MAX_CMD_RETRIES) {
2695 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2698 /* erase the old error information */
2699 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2700 return_status = IO_OK;
2701 INIT_COMPLETION(wait);
2706 /* unlock the buffers from DMA */
2707 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2708 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2709 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2710 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2711 return return_status;
2714 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2715 __u8 page_code, unsigned char scsi3addr[],
2718 ctlr_info_t *h = hba[ctlr];
2719 CommandList_struct *c;
2722 c = cmd_alloc(h, 0);
2725 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2726 scsi3addr, cmd_type);
2727 if (return_status == IO_OK)
2728 return_status = sendcmd_withirq_core(h, c, 1);
2731 return return_status;
2734 static void cciss_geometry_inquiry(int ctlr, int logvol,
2735 sector_t total_size,
2736 unsigned int block_size,
2737 InquiryData_struct *inq_buff,
2738 drive_info_struct *drv)
2742 unsigned char scsi3addr[8];
2744 memset(inq_buff, 0, sizeof(InquiryData_struct));
2745 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2746 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2747 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
2748 if (return_code == IO_OK) {
2749 if (inq_buff->data_byte[8] == 0xFF) {
2751 "cciss: reading geometry failed, volume "
2752 "does not support reading geometry\n");
2754 drv->sectors = 32; /* Sectors per track */
2755 drv->cylinders = total_size + 1;
2756 drv->raid_level = RAID_UNKNOWN;
2758 drv->heads = inq_buff->data_byte[6];
2759 drv->sectors = inq_buff->data_byte[7];
2760 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2761 drv->cylinders += inq_buff->data_byte[5];
2762 drv->raid_level = inq_buff->data_byte[8];
2764 drv->block_size = block_size;
2765 drv->nr_blocks = total_size + 1;
2766 t = drv->heads * drv->sectors;
2768 sector_t real_size = total_size + 1;
2769 unsigned long rem = sector_div(real_size, t);
2772 drv->cylinders = real_size;
2774 } else { /* Get geometry failed */
2775 printk(KERN_WARNING "cciss: reading geometry failed\n");
2780 cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
2781 unsigned int *block_size)
2783 ReadCapdata_struct *buf;
2785 unsigned char scsi3addr[8];
2787 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2789 printk(KERN_WARNING "cciss: out of memory\n");
2793 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2794 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2795 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
2796 if (return_code == IO_OK) {
2797 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2798 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2799 } else { /* read capacity command failed */
2800 printk(KERN_WARNING "cciss: read capacity failed\n");
2802 *block_size = BLOCK_SIZE;
2807 static void cciss_read_capacity_16(int ctlr, int logvol,
2808 sector_t *total_size, unsigned int *block_size)
2810 ReadCapdata_struct_16 *buf;
2812 unsigned char scsi3addr[8];
2814 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2816 printk(KERN_WARNING "cciss: out of memory\n");
2820 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2821 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2822 ctlr, buf, sizeof(ReadCapdata_struct_16),
2823 0, scsi3addr, TYPE_CMD);
2824 if (return_code == IO_OK) {
2825 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2826 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2827 } else { /* read capacity command failed */
2828 printk(KERN_WARNING "cciss: read capacity failed\n");
2830 *block_size = BLOCK_SIZE;
2832 printk(KERN_INFO " blocks= %llu block_size= %d\n",
2833 (unsigned long long)*total_size+1, *block_size);
2837 static int cciss_revalidate(struct gendisk *disk)
2839 ctlr_info_t *h = get_host(disk);
2840 drive_info_struct *drv = get_drv(disk);
2843 unsigned int block_size;
2844 sector_t total_size;
2845 InquiryData_struct *inq_buff = NULL;
2847 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2848 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
2849 sizeof(drv->LunID)) == 0) {
2858 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2859 if (inq_buff == NULL) {
2860 printk(KERN_WARNING "cciss: out of memory\n");
2863 if (h->cciss_read == CCISS_READ_10) {
2864 cciss_read_capacity(h->ctlr, logvol,
2865 &total_size, &block_size);
2867 cciss_read_capacity_16(h->ctlr, logvol,
2868 &total_size, &block_size);
2870 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
2873 blk_queue_logical_block_size(drv->queue, drv->block_size);
2874 set_capacity(disk, drv->nr_blocks);
2881 * Map (physical) PCI mem into (virtual) kernel space
2883 static void __iomem *remap_pci_mem(ulong base, ulong size)
2885 ulong page_base = ((ulong) base) & PAGE_MASK;
2886 ulong page_offs = ((ulong) base) - page_base;
2887 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2889 return page_remapped ? (page_remapped + page_offs) : NULL;
2893 * Takes jobs of the Q and sends them to the hardware, then puts it on
2894 * the Q to wait for completion.
2896 static void start_io(ctlr_info_t *h)
2898 CommandList_struct *c;
2900 while (!hlist_empty(&h->reqQ)) {
2901 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
2902 /* can't do anything if fifo is full */
2903 if ((h->access.fifo_full(h))) {
2904 printk(KERN_WARNING "cciss: fifo full\n");
2908 /* Get the first entry from the Request Q */
2912 /* Tell the controller execute command */
2913 h->access.submit_command(h, c);
2915 /* Put job onto the completed Q */
2920 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2921 /* Zeros out the error record and then resends the command back */
2922 /* to the controller */
2923 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
2925 /* erase the old error information */
2926 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2928 /* add it to software queue and then send it to the controller */
2931 if (h->Qdepth > h->maxQsinceinit)
2932 h->maxQsinceinit = h->Qdepth;
2937 static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2938 unsigned int msg_byte, unsigned int host_byte,
2939 unsigned int driver_byte)
2941 /* inverse of macros in scsi.h */
2942 return (scsi_status_byte & 0xff) |
2943 ((msg_byte & 0xff) << 8) |
2944 ((host_byte & 0xff) << 16) |
2945 ((driver_byte & 0xff) << 24);
2948 static inline int evaluate_target_status(ctlr_info_t *h,
2949 CommandList_struct *cmd, int *retry_cmd)
2951 unsigned char sense_key;
2952 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2956 /* If we get in here, it means we got "target status", that is, scsi status */
2957 status_byte = cmd->err_info->ScsiStatus;
2958 driver_byte = DRIVER_OK;
2959 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2961 if (blk_pc_request(cmd->rq))
2962 host_byte = DID_PASSTHROUGH;
2966 error_value = make_status_bytes(status_byte, msg_byte,
2967 host_byte, driver_byte);
2969 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
2970 if (!blk_pc_request(cmd->rq))
2971 printk(KERN_WARNING "cciss: cmd %p "
2972 "has SCSI Status 0x%x\n",
2973 cmd, cmd->err_info->ScsiStatus);
2977 /* check the sense key */
2978 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2979 /* no status or recovered error */
2980 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2983 if (check_for_unit_attention(h, cmd)) {
2984 *retry_cmd = !blk_pc_request(cmd->rq);
2988 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
2989 if (error_value != 0)
2990 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2991 " sense key = 0x%x\n", cmd, sense_key);
2995 /* SG_IO or similar, copy sense data back */
2996 if (cmd->rq->sense) {
2997 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2998 cmd->rq->sense_len = cmd->err_info->SenseLen;
2999 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3000 cmd->rq->sense_len);
3002 cmd->rq->sense_len = 0;
3007 /* checks the status of the job and calls complete buffers to mark all
3008 * buffers for the completed job. Note that this function does not need
3009 * to hold the hba/queue lock.
3011 static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3015 struct request *rq = cmd->rq;
3020 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
3022 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3023 goto after_error_processing;
3025 switch (cmd->err_info->CommandStatus) {
3026 case CMD_TARGET_STATUS:
3027 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
3029 case CMD_DATA_UNDERRUN:
3030 if (blk_fs_request(cmd->rq)) {
3031 printk(KERN_WARNING "cciss: cmd %p has"
3032 " completed with data underrun "
3034 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
3037 case CMD_DATA_OVERRUN:
3038 if (blk_fs_request(cmd->rq))
3039 printk(KERN_WARNING "cciss: cmd %p has"
3040 " completed with data overrun "
3044 printk(KERN_WARNING "cciss: cmd %p is "
3045 "reported invalid\n", cmd);
3046 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3047 cmd->err_info->CommandStatus, DRIVER_OK,
3048 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3050 case CMD_PROTOCOL_ERR:
3051 printk(KERN_WARNING "cciss: cmd %p has "
3052 "protocol error \n", cmd);
3053 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3054 cmd->err_info->CommandStatus, DRIVER_OK,
3055 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3057 case CMD_HARDWARE_ERR:
3058 printk(KERN_WARNING "cciss: cmd %p had "
3059 " hardware error\n", cmd);
3060 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3061 cmd->err_info->CommandStatus, DRIVER_OK,
3062 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3064 case CMD_CONNECTION_LOST:
3065 printk(KERN_WARNING "cciss: cmd %p had "
3066 "connection lost\n", cmd);
3067 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3068 cmd->err_info->CommandStatus, DRIVER_OK,
3069 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3072 printk(KERN_WARNING "cciss: cmd %p was "
3074 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3075 cmd->err_info->CommandStatus, DRIVER_OK,
3076 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
3078 case CMD_ABORT_FAILED:
3079 printk(KERN_WARNING "cciss: cmd %p reports "
3080 "abort failed\n", cmd);
3081 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3082 cmd->err_info->CommandStatus, DRIVER_OK,
3083 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3085 case CMD_UNSOLICITED_ABORT:
3086 printk(KERN_WARNING "cciss%d: unsolicited "
3087 "abort %p\n", h->ctlr, cmd);
3088 if (cmd->retry_count < MAX_CMD_RETRIES) {
3091 "cciss%d: retrying %p\n", h->ctlr, cmd);
3095 "cciss%d: %p retried too "
3096 "many times\n", h->ctlr, cmd);
3097 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3098 cmd->err_info->CommandStatus, DRIVER_OK,
3099 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
3102 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
3103 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3104 cmd->err_info->CommandStatus, DRIVER_OK,
3105 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3108 printk(KERN_WARNING "cciss: cmd %p returned "
3109 "unknown status %x\n", cmd,
3110 cmd->err_info->CommandStatus);
3111 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3112 cmd->err_info->CommandStatus, DRIVER_OK,
3113 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3116 after_error_processing:
3118 /* We need to return this command */
3120 resend_cciss_cmd(h, cmd);
3123 cmd->rq->completion_data = cmd;
3124 blk_complete_request(cmd->rq);
3127 static inline u32 cciss_tag_contains_index(u32 tag)
3129 #define DIRECT_LOOKUP_BIT 0x04
3130 return tag & DIRECT_LOOKUP_BIT;
3133 static inline u32 cciss_tag_to_index(u32 tag)
3135 #define DIRECT_LOOKUP_SHIFT 3
3136 return tag >> DIRECT_LOOKUP_SHIFT;
3139 static inline u32 cciss_tag_discard_error_bits(u32 tag)
3141 #define CCISS_ERROR_BITS 0x03
3142 return tag & ~CCISS_ERROR_BITS;
3145 static inline void cciss_mark_tag_indexed(u32 *tag)
3147 *tag |= DIRECT_LOOKUP_BIT;
3150 static inline void cciss_set_tag_index(u32 *tag, u32 index)
3152 *tag |= (index << DIRECT_LOOKUP_SHIFT);
3156 * Get a request and submit it to the controller.
3158 static void do_cciss_request(struct request_queue *q)
3160 ctlr_info_t *h = q->queuedata;
3161 CommandList_struct *c;
3164 struct request *creq;
3166 struct scatterlist *tmp_sg;
3167 SGDescriptor_struct *curr_sg;
3168 drive_info_struct *drv;
3173 /* We call start_io here in case there is a command waiting on the
3174 * queue that has not been sent.
3176 if (blk_queue_plugged(q))
3180 creq = blk_peek_request(q);
3184 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
3186 if ((c = cmd_alloc(h, 1)) == NULL)
3189 blk_start_request(creq);
3191 tmp_sg = h->scatter_list[c->cmdindex];
3192 spin_unlock_irq(q->queue_lock);
3194 c->cmd_type = CMD_RWREQ;
3197 /* fill in the request */
3198 drv = creq->rq_disk->private_data;
3199 c->Header.ReplyQueue = 0; /* unused in simple mode */
3200 /* got command from pool, so use the command block index instead */
3201 /* for direct lookups. */
3202 /* The first 2 bits are reserved for controller error reporting. */
3203 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
3204 cciss_mark_tag_indexed(&c->Header.Tag.lower);
3205 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
3206 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3207 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
3208 c->Request.Type.Attribute = ATTR_SIMPLE;
3209 c->Request.Type.Direction =
3210 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
3211 c->Request.Timeout = 0; /* Don't time out */
3213 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
3214 start_blk = blk_rq_pos(creq);
3216 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3217 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
3218 #endif /* CCISS_DEBUG */
3220 sg_init_table(tmp_sg, h->maxsgentries);
3221 seg = blk_rq_map_sg(q, creq, tmp_sg);
3223 /* get the DMA records for the setup */
3224 if (c->Request.Type.Direction == XFER_READ)
3225 dir = PCI_DMA_FROMDEVICE;
3227 dir = PCI_DMA_TODEVICE;
3233 for (i = 0; i < seg; i++) {
3234 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3235 !chained && ((seg - i) > 1)) {
3236 /* Point to next chain block. */
3237 curr_sg = h->cmd_sg_list[c->cmdindex];
3241 curr_sg[sg_index].Len = tmp_sg[i].length;
3242 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
3244 tmp_sg[i].length, dir);
3245 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3246 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3247 curr_sg[sg_index].Ext = 0; /* we are not chaining */
3251 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3252 (seg - (h->max_cmd_sgentries - 1)) *
3253 sizeof(SGDescriptor_struct));
3255 /* track how many SG entries we are using */
3260 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3262 blk_rq_sectors(creq), seg, chained);
3263 #endif /* CCISS_DEBUG */
3265 c->Header.SGList = c->Header.SGTotal = seg + chained;
3266 if (seg > h->max_cmd_sgentries)
3267 c->Header.SGList = h->max_cmd_sgentries;
3269 if (likely(blk_fs_request(creq))) {
3270 if(h->cciss_read == CCISS_READ_10) {
3271 c->Request.CDB[1] = 0;
3272 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
3273 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3274 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3275 c->Request.CDB[5] = start_blk & 0xff;
3276 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
3277 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3278 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
3279 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3281 u32 upper32 = upper_32_bits(start_blk);
3283 c->Request.CDBLen = 16;
3284 c->Request.CDB[1]= 0;
3285 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
3286 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3287 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3288 c->Request.CDB[5]= upper32 & 0xff;
3289 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3290 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3291 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3292 c->Request.CDB[9]= start_blk & 0xff;
3293 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3294 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3295 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3296 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
3297 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3299 } else if (blk_pc_request(creq)) {
3300 c->Request.CDBLen = creq->cmd_len;
3301 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
3303 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3307 spin_lock_irq(q->queue_lock);
3311 if (h->Qdepth > h->maxQsinceinit)
3312 h->maxQsinceinit = h->Qdepth;
3318 /* We will already have the driver lock here so not need
3324 static inline unsigned long get_next_completion(ctlr_info_t *h)
3326 return h->access.command_completed(h);
3329 static inline int interrupt_pending(ctlr_info_t *h)
3331 return h->access.intr_pending(h);
3334 static inline long interrupt_not_for_us(ctlr_info_t *h)
3336 return (((h->access.intr_pending(h) == 0) ||
3337 (h->interrupts_enabled == 0)));
3340 static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
3343 if (unlikely(tag_index >= h->nr_cmds)) {
3344 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3350 static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
3354 if (likely(c->cmd_type == CMD_RWREQ))
3355 complete_command(h, c, 0);
3356 else if (c->cmd_type == CMD_IOCTL_PEND)
3357 complete(c->waiting);
3358 #ifdef CONFIG_CISS_SCSI_TAPE
3359 else if (c->cmd_type == CMD_SCSI)
3360 complete_scsi_command(c, 0, raw_tag);
3364 /* process completion of an indexed ("direct lookup") command */
3365 static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
3368 CommandList_struct *c;
3370 tag_index = cciss_tag_to_index(raw_tag);
3371 if (bad_tag(h, tag_index, raw_tag))
3372 return get_next_completion(h);
3373 c = h->cmd_pool + tag_index;
3374 finish_cmd(h, c, raw_tag);
3375 return get_next_completion(h);
3378 /* process completion of a non-indexed command */
3379 static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
3382 CommandList_struct *c = NULL;
3383 struct hlist_node *tmp;
3384 __u32 busaddr_masked, tag_masked;
3386 tag = cciss_tag_discard_error_bits(raw_tag);
3387 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3388 busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
3389 tag_masked = cciss_tag_discard_error_bits(tag);
3390 if (busaddr_masked == tag_masked) {
3391 finish_cmd(h, c, raw_tag);
3392 return get_next_completion(h);
3395 bad_tag(h, h->nr_cmds + 1, raw_tag);
3396 return get_next_completion(h);
3399 static irqreturn_t do_cciss_intx(int irq, void *dev_id)
3401 ctlr_info_t *h = dev_id;
3402 unsigned long flags;
3405 if (interrupt_not_for_us(h))
3408 * If there are completed commands in the completion queue,
3409 * we had better do something about it.
3411 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3412 while (interrupt_pending(h)) {
3413 raw_tag = get_next_completion(h);
3414 while (raw_tag != FIFO_EMPTY) {
3415 if (cciss_tag_contains_index(raw_tag))
3416 raw_tag = process_indexed_cmd(h, raw_tag);
3418 raw_tag = process_nonindexed_cmd(h, raw_tag);
3422 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3426 /* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
3427 * check the interrupt pending register because it is not set.
3429 static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
3431 ctlr_info_t *h = dev_id;
3432 unsigned long flags;
3435 if (interrupt_not_for_us(h))
3438 * If there are completed commands in the completion queue,
3439 * we had better do something about it.
3441 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3442 raw_tag = get_next_completion(h);
3443 while (raw_tag != FIFO_EMPTY) {
3444 if (cciss_tag_contains_index(raw_tag))
3445 raw_tag = process_indexed_cmd(h, raw_tag);
3447 raw_tag = process_nonindexed_cmd(h, raw_tag);
3450 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3455 * add_to_scan_list() - add controller to rescan queue
3456 * @h: Pointer to the controller.
3458 * Adds the controller to the rescan queue if not already on the queue.
3460 * returns 1 if added to the queue, 0 if skipped (could be on the
3461 * queue already, or the controller could be initializing or shutting
3464 static int add_to_scan_list(struct ctlr_info *h)
3466 struct ctlr_info *test_h;
3470 if (h->busy_initializing)
3473 if (!mutex_trylock(&h->busy_shutting_down))
3476 mutex_lock(&scan_mutex);
3477 list_for_each_entry(test_h, &scan_q, scan_list) {
3483 if (!found && !h->busy_scanning) {
3484 INIT_COMPLETION(h->scan_wait);
3485 list_add_tail(&h->scan_list, &scan_q);
3488 mutex_unlock(&scan_mutex);
3489 mutex_unlock(&h->busy_shutting_down);
3495 * remove_from_scan_list() - remove controller from rescan queue
3496 * @h: Pointer to the controller.
3498 * Removes the controller from the rescan queue if present. Blocks if
3499 * the controller is currently conducting a rescan. The controller
3500 * can be in one of three states:
3501 * 1. Doesn't need a scan
3502 * 2. On the scan list, but not scanning yet (we remove it)
3503 * 3. Busy scanning (and not on the list). In this case we want to wait for
3504 * the scan to complete to make sure the scanning thread for this
3505 * controller is completely idle.
3507 static void remove_from_scan_list(struct ctlr_info *h)
3509 struct ctlr_info *test_h, *tmp_h;
3511 mutex_lock(&scan_mutex);
3512 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3513 if (test_h == h) { /* state 2. */
3514 list_del(&h->scan_list);
3515 complete_all(&h->scan_wait);
3516 mutex_unlock(&scan_mutex);
3520 if (h->busy_scanning) { /* state 3. */
3521 mutex_unlock(&scan_mutex);
3522 wait_for_completion(&h->scan_wait);
3523 } else { /* state 1, nothing to do. */
3524 mutex_unlock(&scan_mutex);
3529 * scan_thread() - kernel thread used to rescan controllers
3532 * A kernel thread used scan for drive topology changes on
3533 * controllers. The thread processes only one controller at a time
3534 * using a queue. Controllers are added to the queue using
3535 * add_to_scan_list() and removed from the queue either after done
3536 * processing or using remove_from_scan_list().
3540 static int scan_thread(void *data)
3542 struct ctlr_info *h;
3545 set_current_state(TASK_INTERRUPTIBLE);
3547 if (kthread_should_stop())
3551 mutex_lock(&scan_mutex);
3552 if (list_empty(&scan_q)) {
3553 mutex_unlock(&scan_mutex);
3557 h = list_entry(scan_q.next,
3560 list_del(&h->scan_list);
3561 h->busy_scanning = 1;
3562 mutex_unlock(&scan_mutex);
3564 rebuild_lun_table(h, 0, 0);
3565 complete_all(&h->scan_wait);
3566 mutex_lock(&scan_mutex);
3567 h->busy_scanning = 0;
3568 mutex_unlock(&scan_mutex);
3575 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3577 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3580 switch (c->err_info->SenseInfo[12]) {
3582 printk(KERN_WARNING "cciss%d: a state change "
3583 "detected, command retried\n", h->ctlr);
3587 printk(KERN_WARNING "cciss%d: LUN failure "
3588 "detected, action required\n", h->ctlr);
3591 case REPORT_LUNS_CHANGED:
3592 printk(KERN_WARNING "cciss%d: report LUN data "
3593 "changed\n", h->ctlr);
3595 * Here, we could call add_to_scan_list and wake up the scan thread,
3596 * except that it's quite likely that we will get more than one
3597 * REPORT_LUNS_CHANGED condition in quick succession, which means
3598 * that those which occur after the first one will likely happen
3599 * *during* the scan_thread's rescan. And the rescan code is not
3600 * robust enough to restart in the middle, undoing what it has already
3601 * done, and it's not clear that it's even possible to do this, since
3602 * part of what it does is notify the block layer, which starts
3603 * doing it's own i/o to read partition tables and so on, and the
3604 * driver doesn't have visibility to know what might need undoing.
3605 * In any event, if possible, it is horribly complicated to get right
3606 * so we just don't do it for now.
3608 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3612 case POWER_OR_RESET:
3613 printk(KERN_WARNING "cciss%d: a power on "
3614 "or device reset detected\n", h->ctlr);
3617 case UNIT_ATTENTION_CLEARED:
3618 printk(KERN_WARNING "cciss%d: unit attention "
3619 "cleared by another initiator\n", h->ctlr);
3623 printk(KERN_WARNING "cciss%d: unknown "
3624 "unit attention detected\n", h->ctlr);
3630 * We cannot read the structure directly, for portability we must use
3632 * This is for debug only.
3635 static void print_cfg_table(CfgTable_struct *tb)
3640 printk("Controller Configuration information\n");
3641 printk("------------------------------------\n");
3642 for (i = 0; i < 4; i++)
3643 temp_name[i] = readb(&(tb->Signature[i]));
3644 temp_name[4] = '\0';
3645 printk(" Signature = %s\n", temp_name);
3646 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
3647 printk(" Transport methods supported = 0x%x\n",
3648 readl(&(tb->TransportSupport)));
3649 printk(" Transport methods active = 0x%x\n",
3650 readl(&(tb->TransportActive)));
3651 printk(" Requested transport Method = 0x%x\n",
3652 readl(&(tb->HostWrite.TransportRequest)));
3653 printk(" Coalesce Interrupt Delay = 0x%x\n",
3654 readl(&(tb->HostWrite.CoalIntDelay)));
3655 printk(" Coalesce Interrupt Count = 0x%x\n",
3656 readl(&(tb->HostWrite.CoalIntCount)));
3657 printk(" Max outstanding commands = 0x%d\n",
3658 readl(&(tb->CmdsOutMax)));
3659 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3660 for (i = 0; i < 16; i++)
3661 temp_name[i] = readb(&(tb->ServerName[i]));
3662 temp_name[16] = '\0';
3663 printk(" Server Name = %s\n", temp_name);
3664 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
3666 #endif /* CCISS_DEBUG */
3668 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3670 int i, offset, mem_type, bar_type;
3671 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3674 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3675 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3676 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3679 mem_type = pci_resource_flags(pdev, i) &
3680 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3682 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3683 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3684 offset += 4; /* 32 bit */
3686 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3689 default: /* reserved in PCI 2.2 */
3691 "Base address is invalid\n");
3696 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3702 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3703 * controllers that are capable. If not, we use IO-APIC mode.
3706 static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3707 struct pci_dev *pdev, __u32 board_id)
3709 #ifdef CONFIG_PCI_MSI
3711 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3715 /* Some boards advertise MSI but don't really support it */
3716 if ((board_id == 0x40700E11) ||
3717 (board_id == 0x40800E11) ||
3718 (board_id == 0x40820E11) || (board_id == 0x40830E11))
3719 goto default_int_mode;
3721 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3722 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3724 c->intr[0] = cciss_msix_entries[0].vector;
3725 c->intr[1] = cciss_msix_entries[1].vector;
3726 c->intr[2] = cciss_msix_entries[2].vector;
3727 c->intr[3] = cciss_msix_entries[3].vector;
3732 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3733 "available\n", err);
3734 goto default_int_mode;
3736 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3738 goto default_int_mode;
3741 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3742 if (!pci_enable_msi(pdev)) {
3745 printk(KERN_WARNING "cciss: MSI init failed\n");
3749 #endif /* CONFIG_PCI_MSI */
3750 /* if we get here we're going to use the default interrupt mode */
3751 c->intr[SIMPLE_MODE_INT] = pdev->irq;
3755 static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
3757 ushort subsystem_vendor_id, subsystem_device_id, command;
3758 __u32 board_id, scratchpad = 0;
3760 __u32 cfg_base_addr;
3761 __u64 cfg_base_addr_index;
3762 int i, prod_index, err;
3764 subsystem_vendor_id = pdev->subsystem_vendor;
3765 subsystem_device_id = pdev->subsystem_device;
3766 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3767 subsystem_vendor_id);
3769 for (i = 0; i < ARRAY_SIZE(products); i++) {
3770 /* Stand aside for hpsa driver on request */
3771 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3773 if (board_id == products[i].board_id)
3777 if (prod_index == ARRAY_SIZE(products)) {
3778 dev_warn(&pdev->dev,
3779 "unrecognized board ID: 0x%08lx, ignoring.\n",
3780 (unsigned long) board_id);
3784 /* check to see if controller has been disabled */
3785 /* BEFORE trying to enable it */
3786 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3787 if (!(command & 0x02)) {
3789 "cciss: controller appears to be disabled\n");
3793 err = pci_enable_device(pdev);
3795 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
3799 err = pci_request_regions(pdev, "cciss");
3801 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
3807 printk("command = %x\n", command);
3808 printk("irq = %x\n", pdev->irq);
3809 printk("board_id = %x\n", board_id);
3810 #endif /* CCISS_DEBUG */
3812 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3813 * else we use the IO-APIC interrupt assigned to us by system ROM.
3815 cciss_interrupt_mode(c, pdev, board_id);
3817 /* find the memory BAR */
3818 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3819 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3822 if (i == DEVICE_COUNT_RESOURCE) {
3823 printk(KERN_WARNING "cciss: No memory BAR found\n");
3825 goto err_out_free_res;
3828 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3833 printk("address 0 = %lx\n", c->paddr);
3834 #endif /* CCISS_DEBUG */
3835 c->vaddr = remap_pci_mem(c->paddr, 0x250);
3837 /* Wait for the board to become ready. (PCI hotplug needs this.)
3838 * We poll for up to 120 secs, once per 100ms. */
3839 for (i = 0; i < 1200; i++) {
3840 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3841 if (scratchpad == CCISS_FIRMWARE_READY)
3843 set_current_state(TASK_INTERRUPTIBLE);
3844 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
3846 if (scratchpad != CCISS_FIRMWARE_READY) {
3847 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
3849 goto err_out_free_res;
3852 /* get the address index number */
3853 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3854 cfg_base_addr &= (__u32) 0x0000ffff;
3856 printk("cfg base address = %x\n", cfg_base_addr);
3857 #endif /* CCISS_DEBUG */
3858 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
3860 printk("cfg base address index = %llx\n",
3861 (unsigned long long)cfg_base_addr_index);
3862 #endif /* CCISS_DEBUG */
3863 if (cfg_base_addr_index == -1) {
3864 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
3866 goto err_out_free_res;
3869 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3871 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
3872 #endif /* CCISS_DEBUG */
3873 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3874 cfg_base_addr_index) +
3875 cfg_offset, sizeof(CfgTable_struct));
3876 c->board_id = board_id;
3879 print_cfg_table(c->cfgtable);
3880 #endif /* CCISS_DEBUG */
3882 /* Some controllers support Zero Memory Raid (ZMR).
3883 * When configured in ZMR mode the number of supported
3884 * commands drops to 64. So instead of just setting an
3885 * arbitrary value we make the driver a little smarter.
3886 * We read the config table to tell us how many commands
3887 * are supported on the controller then subtract 4 to
3888 * leave a little room for ioctl calls.
3890 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
3891 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
3894 * Limit native command to 32 s/g elements to save dma'able memory.
3895 * Howvever spec says if 0, use 31
3898 c->max_cmd_sgentries = 31;
3899 if (c->maxsgentries > 512) {
3900 c->max_cmd_sgentries = 32;
3901 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
3902 c->maxsgentries -= 1; /* account for chain pointer */
3904 c->maxsgentries = 31; /* Default to traditional value */
3905 c->chainsize = 0; /* traditional */
3908 c->product_name = products[prod_index].product_name;
3909 c->access = *(products[prod_index].access);
3910 c->nr_cmds = c->max_commands - 4;
3911 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3912 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3913 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3914 (readb(&c->cfgtable->Signature[3]) != 'S')) {
3915 printk("Does not appear to be a valid CISS config table\n");
3917 goto err_out_free_res;
3921 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3923 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3925 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3929 /* Disabling DMA prefetch and refetch for the P600.
3930 * An ASIC bug may result in accesses to invalid memory addresses.
3931 * We've disabled prefetch for some time now. Testing with XEN
3932 * kernels revealed a bug in the refetch if dom0 resides on a P600.
3934 if(board_id == 0x3225103C) {
3937 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3938 dma_prefetch |= 0x8000;
3939 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
3940 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3942 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
3946 printk("Trying to put board into Simple mode\n");
3947 #endif /* CCISS_DEBUG */
3948 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
3949 /* Update the field, and then ring the doorbell */
3950 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3951 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
3953 /* under certain very rare conditions, this can take awhile.
3954 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3955 * as we enter this code.) */
3956 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3957 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3959 /* delay and try again */
3960 set_current_state(TASK_INTERRUPTIBLE);
3961 schedule_timeout(msecs_to_jiffies(1));
3965 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3966 readl(c->vaddr + SA5_DOORBELL));
3967 #endif /* CCISS_DEBUG */
3969 print_cfg_table(c->cfgtable);
3970 #endif /* CCISS_DEBUG */
3972 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3973 printk(KERN_WARNING "cciss: unable to get board into"
3976 goto err_out_free_res;
3982 * Deliberately omit pci_disable_device(): it does something nasty to
3983 * Smart Array controllers that pci_enable_device does not undo
3985 pci_release_regions(pdev);
3989 /* Function to find the first free pointer into our hba[] array
3990 * Returns -1 if no free entries are left.
3992 static int alloc_cciss_hba(void)
3996 for (i = 0; i < MAX_CTLR; i++) {
4000 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
4007 printk(KERN_WARNING "cciss: This driver supports a maximum"
4008 " of %d controllers.\n", MAX_CTLR);
4011 printk(KERN_ERR "cciss: out of memory.\n");
4015 static void free_hba(int n)
4017 ctlr_info_t *h = hba[n];
4021 for (i = 0; i < h->highest_lun + 1; i++)
4022 if (h->gendisk[i] != NULL)
4023 put_disk(h->gendisk[i]);
4027 /* Send a message CDB to the firmware. */
4028 static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
4031 CommandListHeader_struct CommandHeader;
4032 RequestBlock_struct Request;
4033 ErrDescriptor_struct ErrorDescriptor;
4035 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4038 uint32_t paddr32, tag;
4039 void __iomem *vaddr;
4042 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4046 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4047 CCISS commands, so they must be allocated from the lower 4GiB of
4049 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4055 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4061 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4062 although there's no guarantee, we assume that the address is at
4063 least 4-byte aligned (most likely, it's page-aligned). */
4066 cmd->CommandHeader.ReplyQueue = 0;
4067 cmd->CommandHeader.SGList = 0;
4068 cmd->CommandHeader.SGTotal = 0;
4069 cmd->CommandHeader.Tag.lower = paddr32;
4070 cmd->CommandHeader.Tag.upper = 0;
4071 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4073 cmd->Request.CDBLen = 16;
4074 cmd->Request.Type.Type = TYPE_MSG;
4075 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4076 cmd->Request.Type.Direction = XFER_NONE;
4077 cmd->Request.Timeout = 0; /* Don't time out */
4078 cmd->Request.CDB[0] = opcode;
4079 cmd->Request.CDB[1] = type;
4080 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4082 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4083 cmd->ErrorDescriptor.Addr.upper = 0;
4084 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4086 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4088 for (i = 0; i < 10; i++) {
4089 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4090 if ((tag & ~3) == paddr32)
4092 schedule_timeout_uninterruptible(HZ);
4097 /* we leak the DMA buffer here ... no choice since the controller could
4098 still complete the command. */
4100 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4105 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4108 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4113 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4118 #define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4119 #define cciss_noop(p) cciss_message(p, 3, 0)
4121 static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4123 /* the #defines are stolen from drivers/pci/msi.h. */
4124 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4125 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4130 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4132 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4133 if (control & PCI_MSI_FLAGS_ENABLE) {
4134 printk(KERN_INFO "cciss: resetting MSI\n");
4135 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4139 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4141 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4142 if (control & PCI_MSIX_FLAGS_ENABLE) {
4143 printk(KERN_INFO "cciss: resetting MSI-X\n");
4144 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4151 /* This does a hard reset of the controller using PCI power management
4153 static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4155 u16 pmcsr, saved_config_space[32];
4158 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4160 /* This is very nearly the same thing as
4162 pci_save_state(pci_dev);
4163 pci_set_power_state(pci_dev, PCI_D3hot);
4164 pci_set_power_state(pci_dev, PCI_D0);
4165 pci_restore_state(pci_dev);
4167 but we can't use these nice canned kernel routines on
4168 kexec, because they also check the MSI/MSI-X state in PCI
4169 configuration space and do the wrong thing when it is
4170 set/cleared. Also, the pci_save/restore_state functions
4171 violate the ordering requirements for restoring the
4172 configuration space from the CCISS document (see the
4173 comment below). So we roll our own .... */
4175 for (i = 0; i < 32; i++)
4176 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4178 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4180 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4184 /* Quoting from the Open CISS Specification: "The Power
4185 * Management Control/Status Register (CSR) controls the power
4186 * state of the device. The normal operating state is D0,
4187 * CSR=00h. The software off state is D3, CSR=03h. To reset
4188 * the controller, place the interface device in D3 then to
4189 * D0, this causes a secondary PCI reset which will reset the
4192 /* enter the D3hot power management state */
4193 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4194 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4196 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4198 schedule_timeout_uninterruptible(HZ >> 1);
4200 /* enter the D0 power management state */
4201 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4203 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4205 schedule_timeout_uninterruptible(HZ >> 1);
4207 /* Restore the PCI configuration space. The Open CISS
4208 * Specification says, "Restore the PCI Configuration
4209 * Registers, offsets 00h through 60h. It is important to
4210 * restore the command register, 16-bits at offset 04h,
4211 * last. Do not restore the configuration status register,
4212 * 16-bits at offset 06h." Note that the offset is 2*i. */
4213 for (i = 0; i < 32; i++) {
4214 if (i == 2 || i == 3)
4216 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4219 pci_write_config_word(pdev, 4, saved_config_space[2]);
4225 * This is it. Find all the controllers and register them. I really hate
4226 * stealing all these major device numbers.
4227 * returns the number of block devices registered.
4229 static int __devinit cciss_init_one(struct pci_dev *pdev,
4230 const struct pci_device_id *ent)
4236 int dac, return_code;
4237 InquiryData_struct *inq_buff;
4239 if (reset_devices) {
4240 /* Reset the controller with a PCI power-cycle */
4241 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4244 /* Now try to get the controller to respond to a no-op. Some
4245 devices (notably the HP Smart Array 5i Controller) need
4246 up to 30 seconds to respond. */
4247 for (i=0; i<30; i++) {
4248 if (cciss_noop(pdev) == 0)
4251 schedule_timeout_uninterruptible(HZ);
4254 printk(KERN_ERR "cciss: controller seems dead\n");
4259 i = alloc_cciss_hba();
4263 hba[i]->busy_initializing = 1;
4264 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4265 INIT_HLIST_HEAD(&hba[i]->reqQ);
4266 mutex_init(&hba[i]->busy_shutting_down);
4268 if (cciss_pci_init(hba[i], pdev) != 0)
4269 goto clean_no_release_regions;
4271 sprintf(hba[i]->devname, "cciss%d", i);
4273 hba[i]->pdev = pdev;
4275 init_completion(&hba[i]->scan_wait);
4277 if (cciss_create_hba_sysfs_entry(hba[i]))
4280 /* configure PCI DMA stuff */
4281 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
4283 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
4286 printk(KERN_ERR "cciss: no suitable DMA available\n");
4291 * register with the major number, or get a dynamic major number
4292 * by passing 0 as argument. This is done for greater than
4293 * 8 controller support.
4295 if (i < MAX_CTLR_ORIG)
4296 hba[i]->major = COMPAQ_CISS_MAJOR + i;
4297 rc = register_blkdev(hba[i]->major, hba[i]->devname);
4298 if (rc == -EBUSY || rc == -EINVAL) {
4300 "cciss: Unable to get major number %d for %s "
4301 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
4304 if (i >= MAX_CTLR_ORIG)
4308 /* make sure the board interrupts are off */
4309 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
4310 if (hba[i]->msi_vector || hba[i]->msix_vector) {
4311 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT],
4313 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4314 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
4315 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
4319 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intx,
4320 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4321 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
4322 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
4327 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
4328 hba[i]->devname, pdev->device, pci_name(pdev),
4329 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4331 hba[i]->cmd_pool_bits =
4332 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4333 * sizeof(unsigned long), GFP_KERNEL);
4334 hba[i]->cmd_pool = (CommandList_struct *)
4335 pci_alloc_consistent(hba[i]->pdev,
4336 hba[i]->nr_cmds * sizeof(CommandList_struct),
4337 &(hba[i]->cmd_pool_dhandle));
4338 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4339 pci_alloc_consistent(hba[i]->pdev,
4340 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4341 &(hba[i]->errinfo_pool_dhandle));
4342 if ((hba[i]->cmd_pool_bits == NULL)
4343 || (hba[i]->cmd_pool == NULL)
4344 || (hba[i]->errinfo_pool == NULL)) {
4345 printk(KERN_ERR "cciss: out of memory");
4349 /* Need space for temp scatter list */
4350 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4351 sizeof(struct scatterlist *),
4353 for (k = 0; k < hba[i]->nr_cmds; k++) {
4354 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4355 hba[i]->maxsgentries,
4357 if (hba[i]->scatter_list[k] == NULL) {
4358 printk(KERN_ERR "cciss%d: could not allocate "
4363 hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i],
4364 hba[i]->chainsize, hba[i]->nr_cmds);
4365 if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0)
4368 spin_lock_init(&hba[i]->lock);
4370 /* Initialize the pdev driver private data.
4371 have it point to hba[i]. */
4372 pci_set_drvdata(pdev, hba[i]);
4373 /* command and error info recs zeroed out before
4375 memset(hba[i]->cmd_pool_bits, 0,
4376 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4377 * sizeof(unsigned long));
4379 hba[i]->num_luns = 0;
4380 hba[i]->highest_lun = -1;
4381 for (j = 0; j < CISS_MAX_LUN; j++) {
4382 hba[i]->drv[j] = NULL;
4383 hba[i]->gendisk[j] = NULL;
4386 cciss_scsi_setup(i);
4388 /* Turn the interrupts on so we can service requests */
4389 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4391 /* Get the firmware version */
4392 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4393 if (inq_buff == NULL) {
4394 printk(KERN_ERR "cciss: out of memory\n");
4398 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
4399 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
4400 if (return_code == IO_OK) {
4401 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4402 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4403 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4404 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4405 } else { /* send command failed */
4406 printk(KERN_WARNING "cciss: unable to determine firmware"
4407 " version of controller\n");
4413 hba[i]->cciss_max_sectors = 8192;
4415 rebuild_lun_table(hba[i], 1, 0);
4416 hba[i]->busy_initializing = 0;
4420 kfree(hba[i]->cmd_pool_bits);
4421 /* Free up sg elements */
4422 for (k = 0; k < hba[i]->nr_cmds; k++)
4423 kfree(hba[i]->scatter_list[k]);
4424 kfree(hba[i]->scatter_list);
4425 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
4426 if (hba[i]->cmd_pool)
4427 pci_free_consistent(hba[i]->pdev,
4428 hba[i]->nr_cmds * sizeof(CommandList_struct),
4429 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4430 if (hba[i]->errinfo_pool)
4431 pci_free_consistent(hba[i]->pdev,
4432 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4433 hba[i]->errinfo_pool,
4434 hba[i]->errinfo_pool_dhandle);
4435 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
4437 unregister_blkdev(hba[i]->major, hba[i]->devname);
4439 cciss_destroy_hba_sysfs_entry(hba[i]);
4441 pci_release_regions(pdev);
4442 clean_no_release_regions:
4443 hba[i]->busy_initializing = 0;
4446 * Deliberately omit pci_disable_device(): it does something nasty to
4447 * Smart Array controllers that pci_enable_device does not undo
4449 pci_set_drvdata(pdev, NULL);
4454 static void cciss_shutdown(struct pci_dev *pdev)
4460 h = pci_get_drvdata(pdev);
4461 flush_buf = kzalloc(4, GFP_KERNEL);
4464 "cciss:%d cache not flushed, out of memory.\n",
4468 /* write all data in the battery backed cache to disk */
4469 memset(flush_buf, 0, 4);
4470 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4471 4, 0, CTLR_LUNID, TYPE_CMD);
4473 if (return_code != IO_OK)
4474 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4476 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4477 free_irq(h->intr[2], h);
4480 static void __devexit cciss_remove_one(struct pci_dev *pdev)
4482 ctlr_info_t *tmp_ptr;
4485 if (pci_get_drvdata(pdev) == NULL) {
4486 printk(KERN_ERR "cciss: Unable to remove device \n");
4490 tmp_ptr = pci_get_drvdata(pdev);
4492 if (hba[i] == NULL) {
4493 printk(KERN_ERR "cciss: device appears to "
4494 "already be removed \n");
4498 mutex_lock(&hba[i]->busy_shutting_down);
4500 remove_from_scan_list(hba[i]);
4501 remove_proc_entry(hba[i]->devname, proc_cciss);
4502 unregister_blkdev(hba[i]->major, hba[i]->devname);
4504 /* remove it from the disk list */
4505 for (j = 0; j < CISS_MAX_LUN; j++) {
4506 struct gendisk *disk = hba[i]->gendisk[j];
4508 struct request_queue *q = disk->queue;
4510 if (disk->flags & GENHD_FL_UP) {
4511 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
4515 blk_cleanup_queue(q);
4519 #ifdef CONFIG_CISS_SCSI_TAPE
4520 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
4523 cciss_shutdown(pdev);
4525 #ifdef CONFIG_PCI_MSI
4526 if (hba[i]->msix_vector)
4527 pci_disable_msix(hba[i]->pdev);
4528 else if (hba[i]->msi_vector)
4529 pci_disable_msi(hba[i]->pdev);
4530 #endif /* CONFIG_PCI_MSI */
4532 iounmap(hba[i]->vaddr);
4534 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
4535 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4536 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4537 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
4538 kfree(hba[i]->cmd_pool_bits);
4539 /* Free up sg elements */
4540 for (j = 0; j < hba[i]->nr_cmds; j++)
4541 kfree(hba[i]->scatter_list[j]);
4542 kfree(hba[i]->scatter_list);
4543 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
4545 * Deliberately omit pci_disable_device(): it does something nasty to
4546 * Smart Array controllers that pci_enable_device does not undo
4548 pci_release_regions(pdev);
4549 pci_set_drvdata(pdev, NULL);
4550 cciss_destroy_hba_sysfs_entry(hba[i]);
4551 mutex_unlock(&hba[i]->busy_shutting_down);
4555 static struct pci_driver cciss_pci_driver = {
4557 .probe = cciss_init_one,
4558 .remove = __devexit_p(cciss_remove_one),
4559 .id_table = cciss_pci_device_id, /* id_table */
4560 .shutdown = cciss_shutdown,
4564 * This is it. Register the PCI driver information for the cards we control
4565 * the OS will call our registered routines when it finds one of our cards.
4567 static int __init cciss_init(void)
4572 * The hardware requires that commands are aligned on a 64-bit
4573 * boundary. Given that we use pci_alloc_consistent() to allocate an
4574 * array of them, the size must be a multiple of 8 bytes.
4576 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
4578 printk(KERN_INFO DRIVER_NAME "\n");
4580 err = bus_register(&cciss_bus_type);
4584 /* Start the scan thread */
4585 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4586 if (IS_ERR(cciss_scan_thread)) {
4587 err = PTR_ERR(cciss_scan_thread);
4588 goto err_bus_unregister;
4591 /* Register for our PCI devices */
4592 err = pci_register_driver(&cciss_pci_driver);
4594 goto err_thread_stop;
4599 kthread_stop(cciss_scan_thread);
4601 bus_unregister(&cciss_bus_type);
4606 static void __exit cciss_cleanup(void)
4610 pci_unregister_driver(&cciss_pci_driver);
4611 /* double check that all controller entrys have been removed */
4612 for (i = 0; i < MAX_CTLR; i++) {
4613 if (hba[i] != NULL) {
4614 printk(KERN_WARNING "cciss: had to remove"
4615 " controller %d\n", i);
4616 cciss_remove_one(hba[i]->pdev);
4619 kthread_stop(cciss_scan_thread);
4620 remove_proc_entry("driver/cciss", NULL);
4621 bus_unregister(&cciss_bus_type);
4624 module_init(cciss_init);
4625 module_exit(cciss_cleanup);