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_intr(int irq, void *dev_id);
171 static int cciss_open(struct block_device *bdev, fmode_t mode);
172 static int cciss_release(struct gendisk *disk, fmode_t mode);
173 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
174 unsigned int cmd, unsigned long arg);
175 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
177 static int cciss_revalidate(struct gendisk *disk);
178 static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
179 static int deregister_disk(ctlr_info_t *h, int drv_index,
180 int clear_all, int via_ioctl);
182 static void cciss_read_capacity(int ctlr, int logvol,
183 sector_t *total_size, unsigned int *block_size);
184 static void cciss_read_capacity_16(int ctlr, int logvol,
185 sector_t *total_size, unsigned int *block_size);
186 static void cciss_geometry_inquiry(int ctlr, int logvol,
188 unsigned int block_size, InquiryData_struct *inq_buff,
189 drive_info_struct *drv);
190 static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
192 static void start_io(ctlr_info_t *h);
193 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
194 __u8 page_code, unsigned char scsi3addr[],
196 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
198 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
200 static void fail_all_cmds(unsigned long ctlr);
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 #include "cciss_scsi.c" /* For SCSI tape support */
262 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
265 #define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
267 #ifdef CONFIG_PROC_FS
270 * Report information about this controller.
272 #define ENG_GIG 1000000000
273 #define ENG_GIG_FACTOR (ENG_GIG/512)
274 #define ENGAGE_SCSI "engage scsi"
276 static struct proc_dir_entry *proc_cciss;
278 static void cciss_seq_show_header(struct seq_file *seq)
280 ctlr_info_t *h = seq->private;
282 seq_printf(seq, "%s: HP %s Controller\n"
283 "Board ID: 0x%08lx\n"
284 "Firmware Version: %c%c%c%c\n"
286 "Logical drives: %d\n"
287 "Current Q depth: %d\n"
288 "Current # commands on controller: %d\n"
289 "Max Q depth since init: %d\n"
290 "Max # commands on controller since init: %d\n"
291 "Max SG entries since init: %d\n",
294 (unsigned long)h->board_id,
295 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
296 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
298 h->Qdepth, h->commands_outstanding,
299 h->maxQsinceinit, h->max_outstanding, h->maxSG);
301 #ifdef CONFIG_CISS_SCSI_TAPE
302 cciss_seq_tape_report(seq, h->ctlr);
303 #endif /* CONFIG_CISS_SCSI_TAPE */
306 static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
308 ctlr_info_t *h = seq->private;
309 unsigned ctlr = h->ctlr;
312 /* prevent displaying bogus info during configuration
313 * or deconfiguration of a logical volume
315 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
316 if (h->busy_configuring) {
317 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
318 return ERR_PTR(-EBUSY);
320 h->busy_configuring = 1;
321 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
324 cciss_seq_show_header(seq);
329 static int cciss_seq_show(struct seq_file *seq, void *v)
331 sector_t vol_sz, vol_sz_frac;
332 ctlr_info_t *h = seq->private;
333 unsigned ctlr = h->ctlr;
335 drive_info_struct *drv = h->drv[*pos];
337 if (*pos > h->highest_lun)
340 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
346 vol_sz = drv->nr_blocks;
347 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
349 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
351 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
352 drv->raid_level = RAID_UNKNOWN;
353 seq_printf(seq, "cciss/c%dd%d:"
354 "\t%4u.%02uGB\tRAID %s\n",
355 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
356 raid_label[drv->raid_level]);
360 static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
362 ctlr_info_t *h = seq->private;
364 if (*pos > h->highest_lun)
371 static void cciss_seq_stop(struct seq_file *seq, void *v)
373 ctlr_info_t *h = seq->private;
375 /* Only reset h->busy_configuring if we succeeded in setting
376 * it during cciss_seq_start. */
377 if (v == ERR_PTR(-EBUSY))
380 h->busy_configuring = 0;
383 static const struct seq_operations cciss_seq_ops = {
384 .start = cciss_seq_start,
385 .show = cciss_seq_show,
386 .next = cciss_seq_next,
387 .stop = cciss_seq_stop,
390 static int cciss_seq_open(struct inode *inode, struct file *file)
392 int ret = seq_open(file, &cciss_seq_ops);
393 struct seq_file *seq = file->private_data;
396 seq->private = PDE(inode)->data;
402 cciss_proc_write(struct file *file, const char __user *buf,
403 size_t length, loff_t *ppos)
408 #ifndef CONFIG_CISS_SCSI_TAPE
412 if (!buf || length > PAGE_SIZE - 1)
415 buffer = (char *)__get_free_page(GFP_KERNEL);
420 if (copy_from_user(buffer, buf, length))
422 buffer[length] = '\0';
424 #ifdef CONFIG_CISS_SCSI_TAPE
425 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
426 struct seq_file *seq = file->private_data;
427 ctlr_info_t *h = seq->private;
429 err = cciss_engage_scsi(h->ctlr);
433 #endif /* CONFIG_CISS_SCSI_TAPE */
435 /* might be nice to have "disengage" too, but it's not
436 safely possible. (only 1 module use count, lock issues.) */
439 free_page((unsigned long)buffer);
443 static const struct file_operations cciss_proc_fops = {
444 .owner = THIS_MODULE,
445 .open = cciss_seq_open,
448 .release = seq_release,
449 .write = cciss_proc_write,
452 static void __devinit cciss_procinit(int i)
454 struct proc_dir_entry *pde;
456 if (proc_cciss == NULL)
457 proc_cciss = proc_mkdir("driver/cciss", NULL);
460 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
462 &cciss_proc_fops, hba[i]);
464 #endif /* CONFIG_PROC_FS */
466 #define MAX_PRODUCT_NAME_LEN 19
468 #define to_hba(n) container_of(n, struct ctlr_info, dev)
469 #define to_drv(n) container_of(n, drive_info_struct, dev)
471 static ssize_t host_store_rescan(struct device *dev,
472 struct device_attribute *attr,
473 const char *buf, size_t count)
475 struct ctlr_info *h = to_hba(dev);
478 wake_up_process(cciss_scan_thread);
479 wait_for_completion_interruptible(&h->scan_wait);
483 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
485 static ssize_t dev_show_unique_id(struct device *dev,
486 struct device_attribute *attr,
489 drive_info_struct *drv = to_drv(dev);
490 struct ctlr_info *h = to_hba(drv->dev.parent);
495 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
496 if (h->busy_configuring)
499 memcpy(sn, drv->serial_no, sizeof(sn));
500 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
505 return snprintf(buf, 16 * 2 + 2,
506 "%02X%02X%02X%02X%02X%02X%02X%02X"
507 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
508 sn[0], sn[1], sn[2], sn[3],
509 sn[4], sn[5], sn[6], sn[7],
510 sn[8], sn[9], sn[10], sn[11],
511 sn[12], sn[13], sn[14], sn[15]);
513 static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
515 static ssize_t dev_show_vendor(struct device *dev,
516 struct device_attribute *attr,
519 drive_info_struct *drv = to_drv(dev);
520 struct ctlr_info *h = to_hba(drv->dev.parent);
521 char vendor[VENDOR_LEN + 1];
525 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
526 if (h->busy_configuring)
529 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
530 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
535 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
537 static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
539 static ssize_t dev_show_model(struct device *dev,
540 struct device_attribute *attr,
543 drive_info_struct *drv = to_drv(dev);
544 struct ctlr_info *h = to_hba(drv->dev.parent);
545 char model[MODEL_LEN + 1];
549 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
550 if (h->busy_configuring)
553 memcpy(model, drv->model, MODEL_LEN + 1);
554 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
559 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
561 static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
563 static ssize_t dev_show_rev(struct device *dev,
564 struct device_attribute *attr,
567 drive_info_struct *drv = to_drv(dev);
568 struct ctlr_info *h = to_hba(drv->dev.parent);
569 char rev[REV_LEN + 1];
573 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
574 if (h->busy_configuring)
577 memcpy(rev, drv->rev, REV_LEN + 1);
578 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
583 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
585 static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
587 static ssize_t cciss_show_lunid(struct device *dev,
588 struct device_attribute *attr, char *buf)
590 drive_info_struct *drv = to_drv(dev);
591 struct ctlr_info *h = to_hba(drv->dev.parent);
593 unsigned char lunid[8];
595 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
596 if (h->busy_configuring) {
597 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
601 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
604 memcpy(lunid, drv->LunID, sizeof(lunid));
605 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
606 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
607 lunid[0], lunid[1], lunid[2], lunid[3],
608 lunid[4], lunid[5], lunid[6], lunid[7]);
610 static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
612 static ssize_t cciss_show_raid_level(struct device *dev,
613 struct device_attribute *attr, char *buf)
615 drive_info_struct *drv = to_drv(dev);
616 struct ctlr_info *h = to_hba(drv->dev.parent);
620 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
621 if (h->busy_configuring) {
622 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
625 raid = drv->raid_level;
626 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
627 if (raid < 0 || raid > RAID_UNKNOWN)
630 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
633 static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
635 static ssize_t cciss_show_usage_count(struct device *dev,
636 struct device_attribute *attr, char *buf)
638 drive_info_struct *drv = to_drv(dev);
639 struct ctlr_info *h = to_hba(drv->dev.parent);
643 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
644 if (h->busy_configuring) {
645 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
648 count = drv->usage_count;
649 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
650 return snprintf(buf, 20, "%d\n", count);
652 static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
654 static struct attribute *cciss_host_attrs[] = {
655 &dev_attr_rescan.attr,
659 static struct attribute_group cciss_host_attr_group = {
660 .attrs = cciss_host_attrs,
663 static const struct attribute_group *cciss_host_attr_groups[] = {
664 &cciss_host_attr_group,
668 static struct device_type cciss_host_type = {
669 .name = "cciss_host",
670 .groups = cciss_host_attr_groups,
671 .release = cciss_hba_release,
674 static struct attribute *cciss_dev_attrs[] = {
675 &dev_attr_unique_id.attr,
676 &dev_attr_model.attr,
677 &dev_attr_vendor.attr,
679 &dev_attr_lunid.attr,
680 &dev_attr_raid_level.attr,
681 &dev_attr_usage_count.attr,
685 static struct attribute_group cciss_dev_attr_group = {
686 .attrs = cciss_dev_attrs,
689 static const struct attribute_group *cciss_dev_attr_groups[] = {
690 &cciss_dev_attr_group,
694 static struct device_type cciss_dev_type = {
695 .name = "cciss_device",
696 .groups = cciss_dev_attr_groups,
697 .release = cciss_device_release,
700 static struct bus_type cciss_bus_type = {
705 * cciss_hba_release is called when the reference count
706 * of h->dev goes to zero.
708 static void cciss_hba_release(struct device *dev)
711 * nothing to do, but need this to avoid a warning
712 * about not having a release handler from lib/kref.c.
717 * Initialize sysfs entry for each controller. This sets up and registers
718 * the 'cciss#' directory for each individual controller under
719 * /sys/bus/pci/devices/<dev>/.
721 static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
723 device_initialize(&h->dev);
724 h->dev.type = &cciss_host_type;
725 h->dev.bus = &cciss_bus_type;
726 dev_set_name(&h->dev, "%s", h->devname);
727 h->dev.parent = &h->pdev->dev;
729 return device_add(&h->dev);
733 * Remove sysfs entries for an hba.
735 static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
738 put_device(&h->dev); /* final put. */
741 /* cciss_device_release is called when the reference count
742 * of h->drv[x]dev goes to zero.
744 static void cciss_device_release(struct device *dev)
746 drive_info_struct *drv = to_drv(dev);
751 * Initialize sysfs for each logical drive. This sets up and registers
752 * the 'c#d#' directory for each individual logical drive under
753 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
754 * /sys/block/cciss!c#d# to this entry.
756 static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
761 if (h->drv[drv_index]->device_initialized)
764 dev = &h->drv[drv_index]->dev;
765 device_initialize(dev);
766 dev->type = &cciss_dev_type;
767 dev->bus = &cciss_bus_type;
768 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
769 dev->parent = &h->dev;
770 h->drv[drv_index]->device_initialized = 1;
771 return device_add(dev);
775 * Remove sysfs entries for a logical drive.
777 static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
780 struct device *dev = &h->drv[drv_index]->dev;
782 /* special case for c*d0, we only destroy it on controller exit */
783 if (drv_index == 0 && !ctlr_exiting)
787 put_device(dev); /* the "final" put. */
788 h->drv[drv_index] = NULL;
792 * For operations that cannot sleep, a command block is allocated at init,
793 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
794 * which ones are free or in use. For operations that can wait for kmalloc
795 * to possible sleep, this routine can be called with get_from_pool set to 0.
796 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
798 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
800 CommandList_struct *c;
803 dma_addr_t cmd_dma_handle, err_dma_handle;
805 if (!get_from_pool) {
806 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
807 sizeof(CommandList_struct), &cmd_dma_handle);
810 memset(c, 0, sizeof(CommandList_struct));
814 c->err_info = (ErrorInfo_struct *)
815 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
818 if (c->err_info == NULL) {
819 pci_free_consistent(h->pdev,
820 sizeof(CommandList_struct), c, cmd_dma_handle);
823 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
824 } else { /* get it out of the controllers pool */
827 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
830 } while (test_and_set_bit
831 (i & (BITS_PER_LONG - 1),
832 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
834 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
837 memset(c, 0, sizeof(CommandList_struct));
838 cmd_dma_handle = h->cmd_pool_dhandle
839 + i * sizeof(CommandList_struct);
840 c->err_info = h->errinfo_pool + i;
841 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
842 err_dma_handle = h->errinfo_pool_dhandle
843 + i * sizeof(ErrorInfo_struct);
849 INIT_HLIST_NODE(&c->list);
850 c->busaddr = (__u32) cmd_dma_handle;
851 temp64.val = (__u64) err_dma_handle;
852 c->ErrDesc.Addr.lower = temp64.val32.lower;
853 c->ErrDesc.Addr.upper = temp64.val32.upper;
854 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
861 * Frees a command block that was previously allocated with cmd_alloc().
863 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
868 if (!got_from_pool) {
869 temp64.val32.lower = c->ErrDesc.Addr.lower;
870 temp64.val32.upper = c->ErrDesc.Addr.upper;
871 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
872 c->err_info, (dma_addr_t) temp64.val);
873 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
874 c, (dma_addr_t) c->busaddr);
877 clear_bit(i & (BITS_PER_LONG - 1),
878 h->cmd_pool_bits + (i / BITS_PER_LONG));
883 static inline ctlr_info_t *get_host(struct gendisk *disk)
885 return disk->queue->queuedata;
888 static inline drive_info_struct *get_drv(struct gendisk *disk)
890 return disk->private_data;
894 * Open. Make sure the device is really there.
896 static int cciss_open(struct block_device *bdev, fmode_t mode)
898 ctlr_info_t *host = get_host(bdev->bd_disk);
899 drive_info_struct *drv = get_drv(bdev->bd_disk);
902 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
903 #endif /* CCISS_DEBUG */
905 if (drv->busy_configuring)
908 * Root is allowed to open raw volume zero even if it's not configured
909 * so array config can still work. Root is also allowed to open any
910 * volume that has a LUN ID, so it can issue IOCTL to reread the
911 * disk information. I don't think I really like this
912 * but I'm already using way to many device nodes to claim another one
913 * for "raw controller".
915 if (drv->heads == 0) {
916 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
917 /* if not node 0 make sure it is a partition = 0 */
918 if (MINOR(bdev->bd_dev) & 0x0f) {
920 /* if it is, make sure we have a LUN ID */
921 } else if (memcmp(drv->LunID, CTLR_LUNID,
922 sizeof(drv->LunID))) {
926 if (!capable(CAP_SYS_ADMIN))
937 static int cciss_release(struct gendisk *disk, fmode_t mode)
939 ctlr_info_t *host = get_host(disk);
940 drive_info_struct *drv = get_drv(disk);
943 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
944 #endif /* CCISS_DEBUG */
953 static int do_ioctl(struct block_device *bdev, fmode_t mode,
954 unsigned cmd, unsigned long arg)
958 ret = cciss_ioctl(bdev, mode, cmd, arg);
963 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
964 unsigned cmd, unsigned long arg);
965 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
966 unsigned cmd, unsigned long arg);
968 static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
969 unsigned cmd, unsigned long arg)
972 case CCISS_GETPCIINFO:
973 case CCISS_GETINTINFO:
974 case CCISS_SETINTINFO:
975 case CCISS_GETNODENAME:
976 case CCISS_SETNODENAME:
977 case CCISS_GETHEARTBEAT:
978 case CCISS_GETBUSTYPES:
979 case CCISS_GETFIRMVER:
980 case CCISS_GETDRIVVER:
981 case CCISS_REVALIDVOLS:
982 case CCISS_DEREGDISK:
983 case CCISS_REGNEWDISK:
985 case CCISS_RESCANDISK:
986 case CCISS_GETLUNINFO:
987 return do_ioctl(bdev, mode, cmd, arg);
989 case CCISS_PASSTHRU32:
990 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
991 case CCISS_BIG_PASSTHRU32:
992 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
999 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1000 unsigned cmd, unsigned long arg)
1002 IOCTL32_Command_struct __user *arg32 =
1003 (IOCTL32_Command_struct __user *) arg;
1004 IOCTL_Command_struct arg64;
1005 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1011 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1012 sizeof(arg64.LUN_info));
1014 copy_from_user(&arg64.Request, &arg32->Request,
1015 sizeof(arg64.Request));
1017 copy_from_user(&arg64.error_info, &arg32->error_info,
1018 sizeof(arg64.error_info));
1019 err |= get_user(arg64.buf_size, &arg32->buf_size);
1020 err |= get_user(cp, &arg32->buf);
1021 arg64.buf = compat_ptr(cp);
1022 err |= copy_to_user(p, &arg64, sizeof(arg64));
1027 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1031 copy_in_user(&arg32->error_info, &p->error_info,
1032 sizeof(arg32->error_info));
1038 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1039 unsigned cmd, unsigned long arg)
1041 BIG_IOCTL32_Command_struct __user *arg32 =
1042 (BIG_IOCTL32_Command_struct __user *) arg;
1043 BIG_IOCTL_Command_struct arg64;
1044 BIG_IOCTL_Command_struct __user *p =
1045 compat_alloc_user_space(sizeof(arg64));
1051 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1052 sizeof(arg64.LUN_info));
1054 copy_from_user(&arg64.Request, &arg32->Request,
1055 sizeof(arg64.Request));
1057 copy_from_user(&arg64.error_info, &arg32->error_info,
1058 sizeof(arg64.error_info));
1059 err |= get_user(arg64.buf_size, &arg32->buf_size);
1060 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1061 err |= get_user(cp, &arg32->buf);
1062 arg64.buf = compat_ptr(cp);
1063 err |= copy_to_user(p, &arg64, sizeof(arg64));
1068 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1072 copy_in_user(&arg32->error_info, &p->error_info,
1073 sizeof(arg32->error_info));
1080 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1082 drive_info_struct *drv = get_drv(bdev->bd_disk);
1084 if (!drv->cylinders)
1087 geo->heads = drv->heads;
1088 geo->sectors = drv->sectors;
1089 geo->cylinders = drv->cylinders;
1093 static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1095 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1096 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1097 (void)check_for_unit_attention(host, c);
1102 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
1103 unsigned int cmd, unsigned long arg)
1105 struct gendisk *disk = bdev->bd_disk;
1106 ctlr_info_t *host = get_host(disk);
1107 drive_info_struct *drv = get_drv(disk);
1108 int ctlr = host->ctlr;
1109 void __user *argp = (void __user *)arg;
1112 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
1113 #endif /* CCISS_DEBUG */
1116 case CCISS_GETPCIINFO:
1118 cciss_pci_info_struct pciinfo;
1122 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1123 pciinfo.bus = host->pdev->bus->number;
1124 pciinfo.dev_fn = host->pdev->devfn;
1125 pciinfo.board_id = host->board_id;
1127 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1131 case CCISS_GETINTINFO:
1133 cciss_coalint_struct intinfo;
1137 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1139 readl(&host->cfgtable->HostWrite.CoalIntCount);
1141 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1145 case CCISS_SETINTINFO:
1147 cciss_coalint_struct intinfo;
1148 unsigned long flags;
1153 if (!capable(CAP_SYS_ADMIN))
1156 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1158 if ((intinfo.delay == 0) && (intinfo.count == 0))
1160 // printk("cciss_ioctl: delay and count cannot be 0\n");
1163 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1164 /* Update the field, and then ring the doorbell */
1165 writel(intinfo.delay,
1166 &(host->cfgtable->HostWrite.CoalIntDelay));
1167 writel(intinfo.count,
1168 &(host->cfgtable->HostWrite.CoalIntCount));
1169 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1171 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1172 if (!(readl(host->vaddr + SA5_DOORBELL)
1173 & CFGTBL_ChangeReq))
1175 /* delay and try again */
1178 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1179 if (i >= MAX_IOCTL_CONFIG_WAIT)
1183 case CCISS_GETNODENAME:
1185 NodeName_type NodeName;
1190 for (i = 0; i < 16; i++)
1192 readb(&host->cfgtable->ServerName[i]);
1193 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1197 case CCISS_SETNODENAME:
1199 NodeName_type NodeName;
1200 unsigned long flags;
1205 if (!capable(CAP_SYS_ADMIN))
1209 (NodeName, argp, sizeof(NodeName_type)))
1212 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1214 /* Update the field, and then ring the doorbell */
1215 for (i = 0; i < 16; i++)
1217 &host->cfgtable->ServerName[i]);
1219 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1221 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1222 if (!(readl(host->vaddr + SA5_DOORBELL)
1223 & CFGTBL_ChangeReq))
1225 /* delay and try again */
1228 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1229 if (i >= MAX_IOCTL_CONFIG_WAIT)
1234 case CCISS_GETHEARTBEAT:
1236 Heartbeat_type heartbeat;
1240 heartbeat = readl(&host->cfgtable->HeartBeat);
1242 (argp, &heartbeat, sizeof(Heartbeat_type)))
1246 case CCISS_GETBUSTYPES:
1248 BusTypes_type BusTypes;
1252 BusTypes = readl(&host->cfgtable->BusTypes);
1254 (argp, &BusTypes, sizeof(BusTypes_type)))
1258 case CCISS_GETFIRMVER:
1260 FirmwareVer_type firmware;
1264 memcpy(firmware, host->firm_ver, 4);
1267 (argp, firmware, sizeof(FirmwareVer_type)))
1271 case CCISS_GETDRIVVER:
1273 DriverVer_type DriverVer = DRIVER_VERSION;
1279 (argp, &DriverVer, sizeof(DriverVer_type)))
1284 case CCISS_DEREGDISK:
1286 case CCISS_REVALIDVOLS:
1287 return rebuild_lun_table(host, 0, 1);
1289 case CCISS_GETLUNINFO:{
1290 LogvolInfo_struct luninfo;
1292 memcpy(&luninfo.LunID, drv->LunID,
1293 sizeof(luninfo.LunID));
1294 luninfo.num_opens = drv->usage_count;
1295 luninfo.num_parts = 0;
1296 if (copy_to_user(argp, &luninfo,
1297 sizeof(LogvolInfo_struct)))
1301 case CCISS_PASSTHRU:
1303 IOCTL_Command_struct iocommand;
1304 CommandList_struct *c;
1307 unsigned long flags;
1308 DECLARE_COMPLETION_ONSTACK(wait);
1313 if (!capable(CAP_SYS_RAWIO))
1317 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1319 if ((iocommand.buf_size < 1) &&
1320 (iocommand.Request.Type.Direction != XFER_NONE)) {
1323 #if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1324 /* Check kmalloc limits */
1325 if (iocommand.buf_size > 128000)
1328 if (iocommand.buf_size > 0) {
1329 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1333 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1334 /* Copy the data into the buffer we created */
1336 (buff, iocommand.buf, iocommand.buf_size)) {
1341 memset(buff, 0, iocommand.buf_size);
1343 if ((c = cmd_alloc(host, 0)) == NULL) {
1347 /* Fill in the command type */
1348 c->cmd_type = CMD_IOCTL_PEND;
1349 /* Fill in Command Header */
1350 c->Header.ReplyQueue = 0; /* unused in simple mode */
1351 if (iocommand.buf_size > 0) /* buffer to fill */
1353 c->Header.SGList = 1;
1354 c->Header.SGTotal = 1;
1355 } else /* no buffers to fill */
1357 c->Header.SGList = 0;
1358 c->Header.SGTotal = 0;
1360 c->Header.LUN = iocommand.LUN_info;
1361 /* use the kernel address the cmd block for tag */
1362 c->Header.Tag.lower = c->busaddr;
1364 /* Fill in Request block */
1365 c->Request = iocommand.Request;
1367 /* Fill in the scatter gather information */
1368 if (iocommand.buf_size > 0) {
1369 temp64.val = pci_map_single(host->pdev, buff,
1371 PCI_DMA_BIDIRECTIONAL);
1372 c->SG[0].Addr.lower = temp64.val32.lower;
1373 c->SG[0].Addr.upper = temp64.val32.upper;
1374 c->SG[0].Len = iocommand.buf_size;
1375 c->SG[0].Ext = 0; /* we are not chaining */
1379 /* Put the request on the tail of the request queue */
1380 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1381 addQ(&host->reqQ, c);
1384 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1386 wait_for_completion(&wait);
1388 /* unlock the buffers from DMA */
1389 temp64.val32.lower = c->SG[0].Addr.lower;
1390 temp64.val32.upper = c->SG[0].Addr.upper;
1391 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1393 PCI_DMA_BIDIRECTIONAL);
1395 check_ioctl_unit_attention(host, c);
1397 /* Copy the error information out */
1398 iocommand.error_info = *(c->err_info);
1400 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1402 cmd_free(host, c, 0);
1406 if (iocommand.Request.Type.Direction == XFER_READ) {
1407 /* Copy the data out of the buffer we created */
1409 (iocommand.buf, buff, iocommand.buf_size)) {
1411 cmd_free(host, c, 0);
1416 cmd_free(host, c, 0);
1419 case CCISS_BIG_PASSTHRU:{
1420 BIG_IOCTL_Command_struct *ioc;
1421 CommandList_struct *c;
1422 unsigned char **buff = NULL;
1423 int *buff_size = NULL;
1425 unsigned long flags;
1429 DECLARE_COMPLETION_ONSTACK(wait);
1432 BYTE __user *data_ptr;
1436 if (!capable(CAP_SYS_RAWIO))
1438 ioc = (BIG_IOCTL_Command_struct *)
1439 kmalloc(sizeof(*ioc), GFP_KERNEL);
1444 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1448 if ((ioc->buf_size < 1) &&
1449 (ioc->Request.Type.Direction != XFER_NONE)) {
1453 /* Check kmalloc limits using all SGs */
1454 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1458 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1463 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1468 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
1474 left = ioc->buf_size;
1475 data_ptr = ioc->buf;
1478 ioc->malloc_size) ? ioc->
1480 buff_size[sg_used] = sz;
1481 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1482 if (buff[sg_used] == NULL) {
1486 if (ioc->Request.Type.Direction == XFER_WRITE) {
1488 (buff[sg_used], data_ptr, sz)) {
1493 memset(buff[sg_used], 0, sz);
1499 if ((c = cmd_alloc(host, 0)) == NULL) {
1503 c->cmd_type = CMD_IOCTL_PEND;
1504 c->Header.ReplyQueue = 0;
1506 if (ioc->buf_size > 0) {
1507 c->Header.SGList = sg_used;
1508 c->Header.SGTotal = sg_used;
1510 c->Header.SGList = 0;
1511 c->Header.SGTotal = 0;
1513 c->Header.LUN = ioc->LUN_info;
1514 c->Header.Tag.lower = c->busaddr;
1516 c->Request = ioc->Request;
1517 if (ioc->buf_size > 0) {
1519 for (i = 0; i < sg_used; i++) {
1521 pci_map_single(host->pdev, buff[i],
1523 PCI_DMA_BIDIRECTIONAL);
1524 c->SG[i].Addr.lower =
1526 c->SG[i].Addr.upper =
1528 c->SG[i].Len = buff_size[i];
1529 c->SG[i].Ext = 0; /* we are not chaining */
1533 /* Put the request on the tail of the request queue */
1534 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1535 addQ(&host->reqQ, c);
1538 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1539 wait_for_completion(&wait);
1540 /* unlock the buffers from DMA */
1541 for (i = 0; i < sg_used; i++) {
1542 temp64.val32.lower = c->SG[i].Addr.lower;
1543 temp64.val32.upper = c->SG[i].Addr.upper;
1544 pci_unmap_single(host->pdev,
1545 (dma_addr_t) temp64.val, buff_size[i],
1546 PCI_DMA_BIDIRECTIONAL);
1548 check_ioctl_unit_attention(host, c);
1549 /* Copy the error information out */
1550 ioc->error_info = *(c->err_info);
1551 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1552 cmd_free(host, c, 0);
1556 if (ioc->Request.Type.Direction == XFER_READ) {
1557 /* Copy the data out of the buffer we created */
1558 BYTE __user *ptr = ioc->buf;
1559 for (i = 0; i < sg_used; i++) {
1561 (ptr, buff[i], buff_size[i])) {
1562 cmd_free(host, c, 0);
1566 ptr += buff_size[i];
1569 cmd_free(host, c, 0);
1573 for (i = 0; i < sg_used; i++)
1582 /* scsi_cmd_ioctl handles these, below, though some are not */
1583 /* very meaningful for cciss. SG_IO is the main one people want. */
1585 case SG_GET_VERSION_NUM:
1586 case SG_SET_TIMEOUT:
1587 case SG_GET_TIMEOUT:
1588 case SG_GET_RESERVED_SIZE:
1589 case SG_SET_RESERVED_SIZE:
1590 case SG_EMULATED_HOST:
1592 case SCSI_IOCTL_SEND_COMMAND:
1593 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
1595 /* scsi_cmd_ioctl would normally handle these, below, but */
1596 /* they aren't a good fit for cciss, as CD-ROMs are */
1597 /* not supported, and we don't have any bus/target/lun */
1598 /* which we present to the kernel. */
1600 case CDROM_SEND_PACKET:
1601 case CDROMCLOSETRAY:
1603 case SCSI_IOCTL_GET_IDLUN:
1604 case SCSI_IOCTL_GET_BUS_NUMBER:
1610 static void cciss_check_queues(ctlr_info_t *h)
1612 int start_queue = h->next_to_run;
1615 /* check to see if we have maxed out the number of commands that can
1616 * be placed on the queue. If so then exit. We do this check here
1617 * in case the interrupt we serviced was from an ioctl and did not
1618 * free any new commands.
1620 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
1623 /* We have room on the queue for more commands. Now we need to queue
1624 * them up. We will also keep track of the next queue to run so
1625 * that every queue gets a chance to be started first.
1627 for (i = 0; i < h->highest_lun + 1; i++) {
1628 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1629 /* make sure the disk has been added and the drive is real
1630 * because this can be called from the middle of init_one.
1632 if (!h->drv[curr_queue])
1634 if (!(h->drv[curr_queue]->queue) ||
1635 !(h->drv[curr_queue]->heads))
1637 blk_start_queue(h->gendisk[curr_queue]->queue);
1639 /* check to see if we have maxed out the number of commands
1640 * that can be placed on the queue.
1642 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
1643 if (curr_queue == start_queue) {
1645 (start_queue + 1) % (h->highest_lun + 1);
1648 h->next_to_run = curr_queue;
1655 static void cciss_softirq_done(struct request *rq)
1657 CommandList_struct *cmd = rq->completion_data;
1658 ctlr_info_t *h = hba[cmd->ctlr];
1659 SGDescriptor_struct *curr_sg = cmd->SG;
1660 unsigned long flags;
1665 if (cmd->Request.Type.Direction == XFER_READ)
1666 ddir = PCI_DMA_FROMDEVICE;
1668 ddir = PCI_DMA_TODEVICE;
1670 /* command did not need to be retried */
1671 /* unmap the DMA mapping for all the scatter gather elements */
1672 for (i = 0; i < cmd->Header.SGList; i++) {
1673 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
1674 temp64.val32.lower = cmd->SG[i].Addr.lower;
1675 temp64.val32.upper = cmd->SG[i].Addr.upper;
1676 pci_dma_sync_single_for_cpu(h->pdev, temp64.val,
1677 cmd->SG[i].Len, ddir);
1678 pci_unmap_single(h->pdev, temp64.val,
1679 cmd->SG[i].Len, ddir);
1680 /* Point to the next block */
1681 curr_sg = h->cmd_sg_list[cmd->cmdindex]->sgchain;
1684 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1685 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1686 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1692 printk("Done with %p\n", rq);
1693 #endif /* CCISS_DEBUG */
1695 /* set the residual count for pc requests */
1696 if (blk_pc_request(rq))
1697 rq->resid_len = cmd->err_info->ResidualCnt;
1699 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
1701 spin_lock_irqsave(&h->lock, flags);
1702 cmd_free(h, cmd, 1);
1703 cciss_check_queues(h);
1704 spin_unlock_irqrestore(&h->lock, flags);
1707 static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1708 unsigned char scsi3addr[], uint32_t log_unit)
1710 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1711 sizeof(h->drv[log_unit]->LunID));
1714 /* This function gets the SCSI vendor, model, and revision of a logical drive
1715 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1716 * they cannot be read.
1718 static void cciss_get_device_descr(int ctlr, int logvol,
1719 char *vendor, char *model, char *rev)
1722 InquiryData_struct *inq_buf;
1723 unsigned char scsi3addr[8];
1729 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1733 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1734 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1735 scsi3addr, TYPE_CMD);
1737 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1738 vendor[VENDOR_LEN] = '\0';
1739 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1740 model[MODEL_LEN] = '\0';
1741 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1742 rev[REV_LEN] = '\0';
1749 /* This function gets the serial number of a logical drive via
1750 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1751 * number cannot be had, for whatever reason, 16 bytes of 0xff
1752 * are returned instead.
1754 static void cciss_get_serial_no(int ctlr, int logvol,
1755 unsigned char *serial_no, int buflen)
1757 #define PAGE_83_INQ_BYTES 64
1760 unsigned char scsi3addr[8];
1764 memset(serial_no, 0xff, buflen);
1765 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1768 memset(serial_no, 0, buflen);
1769 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1770 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1771 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
1773 memcpy(serial_no, &buf[8], buflen);
1779 * cciss_add_disk sets up the block device queue for a logical drive
1781 static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1784 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1786 goto init_queue_failure;
1787 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1788 disk->major = h->major;
1789 disk->first_minor = drv_index << NWD_SHIFT;
1790 disk->fops = &cciss_fops;
1791 if (cciss_create_ld_sysfs_entry(h, drv_index))
1793 disk->private_data = h->drv[drv_index];
1794 disk->driverfs_dev = &h->drv[drv_index]->dev;
1796 /* Set up queue information */
1797 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1799 /* This is a hardware imposed limit. */
1800 blk_queue_max_segments(disk->queue, h->maxsgentries);
1802 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
1804 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1806 disk->queue->queuedata = h;
1808 blk_queue_logical_block_size(disk->queue,
1809 h->drv[drv_index]->block_size);
1811 /* Make sure all queue data is written out before */
1812 /* setting h->drv[drv_index]->queue, as setting this */
1813 /* allows the interrupt handler to start the queue */
1815 h->drv[drv_index]->queue = disk->queue;
1820 blk_cleanup_queue(disk->queue);
1826 /* This function will check the usage_count of the drive to be updated/added.
1827 * If the usage_count is zero and it is a heretofore unknown drive, or,
1828 * the drive's capacity, geometry, or serial number has changed,
1829 * then the drive information will be updated and the disk will be
1830 * re-registered with the kernel. If these conditions don't hold,
1831 * then it will be left alone for the next reboot. The exception to this
1832 * is disk 0 which will always be left registered with the kernel since it
1833 * is also the controller node. Any changes to disk 0 will show up on
1836 static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1839 ctlr_info_t *h = hba[ctlr];
1840 struct gendisk *disk;
1841 InquiryData_struct *inq_buff = NULL;
1842 unsigned int block_size;
1843 sector_t total_size;
1844 unsigned long flags = 0;
1846 drive_info_struct *drvinfo;
1848 /* Get information about the disk and modify the driver structure */
1849 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1850 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
1851 if (inq_buff == NULL || drvinfo == NULL)
1854 /* testing to see if 16-byte CDBs are already being used */
1855 if (h->cciss_read == CCISS_READ_16) {
1856 cciss_read_capacity_16(h->ctlr, drv_index,
1857 &total_size, &block_size);
1860 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
1861 /* if read_capacity returns all F's this volume is >2TB */
1862 /* in size so we switch to 16-byte CDB's for all */
1863 /* read/write ops */
1864 if (total_size == 0xFFFFFFFFULL) {
1865 cciss_read_capacity_16(ctlr, drv_index,
1866 &total_size, &block_size);
1867 h->cciss_read = CCISS_READ_16;
1868 h->cciss_write = CCISS_WRITE_16;
1870 h->cciss_read = CCISS_READ_10;
1871 h->cciss_write = CCISS_WRITE_10;
1875 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
1877 drvinfo->block_size = block_size;
1878 drvinfo->nr_blocks = total_size + 1;
1880 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
1881 drvinfo->model, drvinfo->rev);
1882 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
1883 sizeof(drvinfo->serial_no));
1884 /* Save the lunid in case we deregister the disk, below. */
1885 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1886 sizeof(drvinfo->LunID));
1888 /* Is it the same disk we already know, and nothing's changed? */
1889 if (h->drv[drv_index]->raid_level != -1 &&
1890 ((memcmp(drvinfo->serial_no,
1891 h->drv[drv_index]->serial_no, 16) == 0) &&
1892 drvinfo->block_size == h->drv[drv_index]->block_size &&
1893 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1894 drvinfo->heads == h->drv[drv_index]->heads &&
1895 drvinfo->sectors == h->drv[drv_index]->sectors &&
1896 drvinfo->cylinders == h->drv[drv_index]->cylinders))
1897 /* The disk is unchanged, nothing to update */
1900 /* If we get here it's not the same disk, or something's changed,
1901 * so we need to * deregister it, and re-register it, if it's not
1903 * If the disk already exists then deregister it before proceeding
1904 * (unless it's the first disk (for the controller node).
1906 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
1907 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
1908 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1909 h->drv[drv_index]->busy_configuring = 1;
1910 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1912 /* deregister_disk sets h->drv[drv_index]->queue = NULL
1913 * which keeps the interrupt handler from starting
1916 ret = deregister_disk(h, drv_index, 0, via_ioctl);
1919 /* If the disk is in use return */
1923 /* Save the new information from cciss_geometry_inquiry
1924 * and serial number inquiry. If the disk was deregistered
1925 * above, then h->drv[drv_index] will be NULL.
1927 if (h->drv[drv_index] == NULL) {
1928 drvinfo->device_initialized = 0;
1929 h->drv[drv_index] = drvinfo;
1930 drvinfo = NULL; /* so it won't be freed below. */
1932 /* special case for cxd0 */
1933 h->drv[drv_index]->block_size = drvinfo->block_size;
1934 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
1935 h->drv[drv_index]->heads = drvinfo->heads;
1936 h->drv[drv_index]->sectors = drvinfo->sectors;
1937 h->drv[drv_index]->cylinders = drvinfo->cylinders;
1938 h->drv[drv_index]->raid_level = drvinfo->raid_level;
1939 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
1940 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
1942 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
1943 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
1947 disk = h->gendisk[drv_index];
1948 set_capacity(disk, h->drv[drv_index]->nr_blocks);
1950 /* If it's not disk 0 (drv_index != 0)
1951 * or if it was disk 0, but there was previously
1952 * no actual corresponding configured logical drive
1953 * (raid_leve == -1) then we want to update the
1954 * logical drive's information.
1956 if (drv_index || first_time) {
1957 if (cciss_add_disk(h, disk, drv_index) != 0) {
1958 cciss_free_gendisk(h, drv_index);
1959 cciss_free_drive_info(h, drv_index);
1960 printk(KERN_WARNING "cciss:%d could not update "
1961 "disk %d\n", h->ctlr, drv_index);
1971 printk(KERN_ERR "cciss: out of memory\n");
1975 /* This function will find the first index of the controllers drive array
1976 * that has a null drv pointer and allocate the drive info struct and
1977 * will return that index This is where new drives will be added.
1978 * If the index to be returned is greater than the highest_lun index for
1979 * the controller then highest_lun is set * to this new index.
1980 * If there are no available indexes or if tha allocation fails, then -1
1981 * is returned. * "controller_node" is used to know if this is a real
1982 * logical drive, or just the controller node, which determines if this
1983 * counts towards highest_lun.
1985 static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
1988 drive_info_struct *drv;
1990 /* Search for an empty slot for our drive info */
1991 for (i = 0; i < CISS_MAX_LUN; i++) {
1993 /* if not cxd0 case, and it's occupied, skip it. */
1994 if (h->drv[i] && i != 0)
1997 * If it's cxd0 case, and drv is alloc'ed already, and a
1998 * disk is configured there, skip it.
2000 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2004 * We've found an empty slot. Update highest_lun
2005 * provided this isn't just the fake cxd0 controller node.
2007 if (i > h->highest_lun && !controller_node)
2010 /* If adding a real disk at cxd0, and it's already alloc'ed */
2011 if (i == 0 && h->drv[i] != NULL)
2015 * Found an empty slot, not already alloc'ed. Allocate it.
2016 * Mark it with raid_level == -1, so we know it's new later on.
2018 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2021 drv->raid_level = -1; /* so we know it's new */
2028 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2030 kfree(h->drv[drv_index]);
2031 h->drv[drv_index] = NULL;
2034 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2036 put_disk(h->gendisk[drv_index]);
2037 h->gendisk[drv_index] = NULL;
2040 /* cciss_add_gendisk finds a free hba[]->drv structure
2041 * and allocates a gendisk if needed, and sets the lunid
2042 * in the drvinfo structure. It returns the index into
2043 * the ->drv[] array, or -1 if none are free.
2044 * is_controller_node indicates whether highest_lun should
2045 * count this disk, or if it's only being added to provide
2046 * a means to talk to the controller in case no logical
2047 * drives have yet been configured.
2049 static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2050 int controller_node)
2054 drv_index = cciss_alloc_drive_info(h, controller_node);
2055 if (drv_index == -1)
2058 /*Check if the gendisk needs to be allocated */
2059 if (!h->gendisk[drv_index]) {
2060 h->gendisk[drv_index] =
2061 alloc_disk(1 << NWD_SHIFT);
2062 if (!h->gendisk[drv_index]) {
2063 printk(KERN_ERR "cciss%d: could not "
2064 "allocate a new disk %d\n",
2065 h->ctlr, drv_index);
2066 goto err_free_drive_info;
2069 memcpy(h->drv[drv_index]->LunID, lunid,
2070 sizeof(h->drv[drv_index]->LunID));
2071 if (cciss_create_ld_sysfs_entry(h, drv_index))
2073 /* Don't need to mark this busy because nobody */
2074 /* else knows about this disk yet to contend */
2075 /* for access to it. */
2076 h->drv[drv_index]->busy_configuring = 0;
2081 cciss_free_gendisk(h, drv_index);
2082 err_free_drive_info:
2083 cciss_free_drive_info(h, drv_index);
2087 /* This is for the special case of a controller which
2088 * has no logical drives. In this case, we still need
2089 * to register a disk so the controller can be accessed
2090 * by the Array Config Utility.
2092 static void cciss_add_controller_node(ctlr_info_t *h)
2094 struct gendisk *disk;
2097 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2100 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
2101 if (drv_index == -1)
2103 h->drv[drv_index]->block_size = 512;
2104 h->drv[drv_index]->nr_blocks = 0;
2105 h->drv[drv_index]->heads = 0;
2106 h->drv[drv_index]->sectors = 0;
2107 h->drv[drv_index]->cylinders = 0;
2108 h->drv[drv_index]->raid_level = -1;
2109 memset(h->drv[drv_index]->serial_no, 0, 16);
2110 disk = h->gendisk[drv_index];
2111 if (cciss_add_disk(h, disk, drv_index) == 0)
2113 cciss_free_gendisk(h, drv_index);
2114 cciss_free_drive_info(h, drv_index);
2116 printk(KERN_WARNING "cciss%d: could not "
2117 "add disk 0.\n", h->ctlr);
2121 /* This function will add and remove logical drives from the Logical
2122 * drive array of the controller and maintain persistency of ordering
2123 * so that mount points are preserved until the next reboot. This allows
2124 * for the removal of logical drives in the middle of the drive array
2125 * without a re-ordering of those drives.
2127 * h = The controller to perform the operations on
2129 static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2134 ReportLunData_struct *ld_buff = NULL;
2140 unsigned char lunid[8] = CTLR_LUNID;
2141 unsigned long flags;
2143 if (!capable(CAP_SYS_RAWIO))
2146 /* Set busy_configuring flag for this operation */
2147 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2148 if (h->busy_configuring) {
2149 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2152 h->busy_configuring = 1;
2153 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2155 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2156 if (ld_buff == NULL)
2159 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
2160 sizeof(ReportLunData_struct),
2161 0, CTLR_LUNID, TYPE_CMD);
2163 if (return_code == IO_OK)
2164 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2165 else { /* reading number of logical volumes failed */
2166 printk(KERN_WARNING "cciss: report logical volume"
2167 " command failed\n");
2172 num_luns = listlength / 8; /* 8 bytes per entry */
2173 if (num_luns > CISS_MAX_LUN) {
2174 num_luns = CISS_MAX_LUN;
2175 printk(KERN_WARNING "cciss: more luns configured"
2176 " on controller than can be handled by"
2181 cciss_add_controller_node(h);
2183 /* Compare controller drive array to driver's drive array
2184 * to see if any drives are missing on the controller due
2185 * to action of Array Config Utility (user deletes drive)
2186 * and deregister logical drives which have disappeared.
2188 for (i = 0; i <= h->highest_lun; i++) {
2192 /* skip holes in the array from already deleted drives */
2193 if (h->drv[i] == NULL)
2196 for (j = 0; j < num_luns; j++) {
2197 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2198 if (memcmp(h->drv[i]->LunID, lunid,
2199 sizeof(lunid)) == 0) {
2205 /* Deregister it from the OS, it's gone. */
2206 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2207 h->drv[i]->busy_configuring = 1;
2208 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2209 return_code = deregister_disk(h, i, 1, via_ioctl);
2210 if (h->drv[i] != NULL)
2211 h->drv[i]->busy_configuring = 0;
2215 /* Compare controller drive array to driver's drive array.
2216 * Check for updates in the drive information and any new drives
2217 * on the controller due to ACU adding logical drives, or changing
2218 * a logical drive's size, etc. Reregister any new/changed drives
2220 for (i = 0; i < num_luns; i++) {
2225 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
2226 /* Find if the LUN is already in the drive array
2227 * of the driver. If so then update its info
2228 * if not in use. If it does not exist then find
2229 * the first free index and add it.
2231 for (j = 0; j <= h->highest_lun; j++) {
2232 if (h->drv[j] != NULL &&
2233 memcmp(h->drv[j]->LunID, lunid,
2234 sizeof(h->drv[j]->LunID)) == 0) {
2241 /* check if the drive was found already in the array */
2243 drv_index = cciss_add_gendisk(h, lunid, 0);
2244 if (drv_index == -1)
2247 cciss_update_drive_info(ctlr, drv_index, first_time,
2253 h->busy_configuring = 0;
2254 /* We return -1 here to tell the ACU that we have registered/updated
2255 * all of the drives that we can and to keep it from calling us
2260 printk(KERN_ERR "cciss: out of memory\n");
2261 h->busy_configuring = 0;
2265 static void cciss_clear_drive_info(drive_info_struct *drive_info)
2267 /* zero out the disk size info */
2268 drive_info->nr_blocks = 0;
2269 drive_info->block_size = 0;
2270 drive_info->heads = 0;
2271 drive_info->sectors = 0;
2272 drive_info->cylinders = 0;
2273 drive_info->raid_level = -1;
2274 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2275 memset(drive_info->model, 0, sizeof(drive_info->model));
2276 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2277 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2279 * don't clear the LUNID though, we need to remember which
2284 /* This function will deregister the disk and it's queue from the
2285 * kernel. It must be called with the controller lock held and the
2286 * drv structures busy_configuring flag set. It's parameters are:
2288 * disk = This is the disk to be deregistered
2289 * drv = This is the drive_info_struct associated with the disk to be
2290 * deregistered. It contains information about the disk used
2292 * clear_all = This flag determines whether or not the disk information
2293 * is going to be completely cleared out and the highest_lun
2294 * reset. Sometimes we want to clear out information about
2295 * the disk in preparation for re-adding it. In this case
2296 * the highest_lun should be left unchanged and the LunID
2297 * should not be cleared.
2299 * This indicates whether we've reached this path via ioctl.
2300 * This affects the maximum usage count allowed for c0d0 to be messed with.
2301 * If this path is reached via ioctl(), then the max_usage_count will
2302 * be 1, as the process calling ioctl() has got to have the device open.
2303 * If we get here via sysfs, then the max usage count will be zero.
2305 static int deregister_disk(ctlr_info_t *h, int drv_index,
2306 int clear_all, int via_ioctl)
2309 struct gendisk *disk;
2310 drive_info_struct *drv;
2311 int recalculate_highest_lun;
2313 if (!capable(CAP_SYS_RAWIO))
2316 drv = h->drv[drv_index];
2317 disk = h->gendisk[drv_index];
2319 /* make sure logical volume is NOT is use */
2320 if (clear_all || (h->gendisk[0] == disk)) {
2321 if (drv->usage_count > via_ioctl)
2323 } else if (drv->usage_count > 0)
2326 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2328 /* invalidate the devices and deregister the disk. If it is disk
2329 * zero do not deregister it but just zero out it's values. This
2330 * allows us to delete disk zero but keep the controller registered.
2332 if (h->gendisk[0] != disk) {
2333 struct request_queue *q = disk->queue;
2334 if (disk->flags & GENHD_FL_UP) {
2335 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
2339 blk_cleanup_queue(q);
2340 /* If clear_all is set then we are deleting the logical
2341 * drive, not just refreshing its info. For drives
2342 * other than disk 0 we will call put_disk. We do not
2343 * do this for disk 0 as we need it to be able to
2344 * configure the controller.
2347 /* This isn't pretty, but we need to find the
2348 * disk in our array and NULL our the pointer.
2349 * This is so that we will call alloc_disk if
2350 * this index is used again later.
2352 for (i=0; i < CISS_MAX_LUN; i++){
2353 if (h->gendisk[i] == disk) {
2354 h->gendisk[i] = NULL;
2361 set_capacity(disk, 0);
2362 cciss_clear_drive_info(drv);
2367 /* if it was the last disk, find the new hightest lun */
2368 if (clear_all && recalculate_highest_lun) {
2369 int i, newhighest = -1;
2370 for (i = 0; i <= h->highest_lun; i++) {
2371 /* if the disk has size > 0, it is available */
2372 if (h->drv[i] && h->drv[i]->heads)
2375 h->highest_lun = newhighest;
2380 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2381 size_t size, __u8 page_code, unsigned char *scsi3addr,
2384 ctlr_info_t *h = hba[ctlr];
2385 u64bit buff_dma_handle;
2388 c->cmd_type = CMD_IOCTL_PEND;
2389 c->Header.ReplyQueue = 0;
2391 c->Header.SGList = 1;
2392 c->Header.SGTotal = 1;
2394 c->Header.SGList = 0;
2395 c->Header.SGTotal = 0;
2397 c->Header.Tag.lower = c->busaddr;
2398 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2400 c->Request.Type.Type = cmd_type;
2401 if (cmd_type == TYPE_CMD) {
2404 /* are we trying to read a vital product page */
2405 if (page_code != 0) {
2406 c->Request.CDB[1] = 0x01;
2407 c->Request.CDB[2] = page_code;
2409 c->Request.CDBLen = 6;
2410 c->Request.Type.Attribute = ATTR_SIMPLE;
2411 c->Request.Type.Direction = XFER_READ;
2412 c->Request.Timeout = 0;
2413 c->Request.CDB[0] = CISS_INQUIRY;
2414 c->Request.CDB[4] = size & 0xFF;
2416 case CISS_REPORT_LOG:
2417 case CISS_REPORT_PHYS:
2418 /* Talking to controller so It's a physical command
2419 mode = 00 target = 0. Nothing to write.
2421 c->Request.CDBLen = 12;
2422 c->Request.Type.Attribute = ATTR_SIMPLE;
2423 c->Request.Type.Direction = XFER_READ;
2424 c->Request.Timeout = 0;
2425 c->Request.CDB[0] = cmd;
2426 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2427 c->Request.CDB[7] = (size >> 16) & 0xFF;
2428 c->Request.CDB[8] = (size >> 8) & 0xFF;
2429 c->Request.CDB[9] = size & 0xFF;
2432 case CCISS_READ_CAPACITY:
2433 c->Request.CDBLen = 10;
2434 c->Request.Type.Attribute = ATTR_SIMPLE;
2435 c->Request.Type.Direction = XFER_READ;
2436 c->Request.Timeout = 0;
2437 c->Request.CDB[0] = cmd;
2439 case CCISS_READ_CAPACITY_16:
2440 c->Request.CDBLen = 16;
2441 c->Request.Type.Attribute = ATTR_SIMPLE;
2442 c->Request.Type.Direction = XFER_READ;
2443 c->Request.Timeout = 0;
2444 c->Request.CDB[0] = cmd;
2445 c->Request.CDB[1] = 0x10;
2446 c->Request.CDB[10] = (size >> 24) & 0xFF;
2447 c->Request.CDB[11] = (size >> 16) & 0xFF;
2448 c->Request.CDB[12] = (size >> 8) & 0xFF;
2449 c->Request.CDB[13] = size & 0xFF;
2450 c->Request.Timeout = 0;
2451 c->Request.CDB[0] = cmd;
2453 case CCISS_CACHE_FLUSH:
2454 c->Request.CDBLen = 12;
2455 c->Request.Type.Attribute = ATTR_SIMPLE;
2456 c->Request.Type.Direction = XFER_WRITE;
2457 c->Request.Timeout = 0;
2458 c->Request.CDB[0] = BMIC_WRITE;
2459 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2461 case TEST_UNIT_READY:
2462 c->Request.CDBLen = 6;
2463 c->Request.Type.Attribute = ATTR_SIMPLE;
2464 c->Request.Type.Direction = XFER_NONE;
2465 c->Request.Timeout = 0;
2469 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
2472 } else if (cmd_type == TYPE_MSG) {
2474 case 0: /* ABORT message */
2475 c->Request.CDBLen = 12;
2476 c->Request.Type.Attribute = ATTR_SIMPLE;
2477 c->Request.Type.Direction = XFER_WRITE;
2478 c->Request.Timeout = 0;
2479 c->Request.CDB[0] = cmd; /* abort */
2480 c->Request.CDB[1] = 0; /* abort a command */
2481 /* buff contains the tag of the command to abort */
2482 memcpy(&c->Request.CDB[4], buff, 8);
2484 case 1: /* RESET message */
2485 c->Request.CDBLen = 16;
2486 c->Request.Type.Attribute = ATTR_SIMPLE;
2487 c->Request.Type.Direction = XFER_NONE;
2488 c->Request.Timeout = 0;
2489 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
2490 c->Request.CDB[0] = cmd; /* reset */
2491 c->Request.CDB[1] = 0x03; /* reset a target */
2493 case 3: /* No-Op message */
2494 c->Request.CDBLen = 1;
2495 c->Request.Type.Attribute = ATTR_SIMPLE;
2496 c->Request.Type.Direction = XFER_WRITE;
2497 c->Request.Timeout = 0;
2498 c->Request.CDB[0] = cmd;
2502 "cciss%d: unknown message type %d\n", ctlr, cmd);
2507 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
2510 /* Fill in the scatter gather information */
2512 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
2514 PCI_DMA_BIDIRECTIONAL);
2515 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2516 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2517 c->SG[0].Len = size;
2518 c->SG[0].Ext = 0; /* we are not chaining */
2523 static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2525 switch (c->err_info->ScsiStatus) {
2528 case SAM_STAT_CHECK_CONDITION:
2529 switch (0xf & c->err_info->SenseInfo[2]) {
2530 case 0: return IO_OK; /* no sense */
2531 case 1: return IO_OK; /* recovered error */
2533 if (check_for_unit_attention(h, c))
2534 return IO_NEEDS_RETRY;
2535 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2536 "check condition, sense key = 0x%02x\n",
2537 h->ctlr, c->Request.CDB[0],
2538 c->err_info->SenseInfo[2]);
2542 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2543 "scsi status = 0x%02x\n", h->ctlr,
2544 c->Request.CDB[0], c->err_info->ScsiStatus);
2550 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
2552 int return_status = IO_OK;
2554 if (c->err_info->CommandStatus == CMD_SUCCESS)
2557 switch (c->err_info->CommandStatus) {
2558 case CMD_TARGET_STATUS:
2559 return_status = check_target_status(h, c);
2561 case CMD_DATA_UNDERRUN:
2562 case CMD_DATA_OVERRUN:
2563 /* expected for inquiry and report lun commands */
2566 printk(KERN_WARNING "cciss: cmd 0x%02x is "
2567 "reported invalid\n", c->Request.CDB[0]);
2568 return_status = IO_ERROR;
2570 case CMD_PROTOCOL_ERR:
2571 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2572 "protocol error \n", c->Request.CDB[0]);
2573 return_status = IO_ERROR;
2575 case CMD_HARDWARE_ERR:
2576 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2577 " hardware error\n", c->Request.CDB[0]);
2578 return_status = IO_ERROR;
2580 case CMD_CONNECTION_LOST:
2581 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2582 "connection lost\n", c->Request.CDB[0]);
2583 return_status = IO_ERROR;
2586 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2587 "aborted\n", c->Request.CDB[0]);
2588 return_status = IO_ERROR;
2590 case CMD_ABORT_FAILED:
2591 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2592 "abort failed\n", c->Request.CDB[0]);
2593 return_status = IO_ERROR;
2595 case CMD_UNSOLICITED_ABORT:
2597 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2599 return_status = IO_NEEDS_RETRY;
2602 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2603 "unknown status %x\n", c->Request.CDB[0],
2604 c->err_info->CommandStatus);
2605 return_status = IO_ERROR;
2607 return return_status;
2610 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2613 DECLARE_COMPLETION_ONSTACK(wait);
2614 u64bit buff_dma_handle;
2615 unsigned long flags;
2616 int return_status = IO_OK;
2620 /* Put the request on the tail of the queue and send it */
2621 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2625 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2627 wait_for_completion(&wait);
2629 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2632 return_status = process_sendcmd_error(h, c);
2634 if (return_status == IO_NEEDS_RETRY &&
2635 c->retry_count < MAX_CMD_RETRIES) {
2636 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2639 /* erase the old error information */
2640 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2641 return_status = IO_OK;
2642 INIT_COMPLETION(wait);
2647 /* unlock the buffers from DMA */
2648 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2649 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2650 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2651 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2652 return return_status;
2655 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2656 __u8 page_code, unsigned char scsi3addr[],
2659 ctlr_info_t *h = hba[ctlr];
2660 CommandList_struct *c;
2663 c = cmd_alloc(h, 0);
2666 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2667 scsi3addr, cmd_type);
2668 if (return_status == IO_OK)
2669 return_status = sendcmd_withirq_core(h, c, 1);
2672 return return_status;
2675 static void cciss_geometry_inquiry(int ctlr, int logvol,
2676 sector_t total_size,
2677 unsigned int block_size,
2678 InquiryData_struct *inq_buff,
2679 drive_info_struct *drv)
2683 unsigned char scsi3addr[8];
2685 memset(inq_buff, 0, sizeof(InquiryData_struct));
2686 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2687 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2688 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
2689 if (return_code == IO_OK) {
2690 if (inq_buff->data_byte[8] == 0xFF) {
2692 "cciss: reading geometry failed, volume "
2693 "does not support reading geometry\n");
2695 drv->sectors = 32; /* Sectors per track */
2696 drv->cylinders = total_size + 1;
2697 drv->raid_level = RAID_UNKNOWN;
2699 drv->heads = inq_buff->data_byte[6];
2700 drv->sectors = inq_buff->data_byte[7];
2701 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2702 drv->cylinders += inq_buff->data_byte[5];
2703 drv->raid_level = inq_buff->data_byte[8];
2705 drv->block_size = block_size;
2706 drv->nr_blocks = total_size + 1;
2707 t = drv->heads * drv->sectors;
2709 sector_t real_size = total_size + 1;
2710 unsigned long rem = sector_div(real_size, t);
2713 drv->cylinders = real_size;
2715 } else { /* Get geometry failed */
2716 printk(KERN_WARNING "cciss: reading geometry failed\n");
2721 cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
2722 unsigned int *block_size)
2724 ReadCapdata_struct *buf;
2726 unsigned char scsi3addr[8];
2728 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2730 printk(KERN_WARNING "cciss: out of memory\n");
2734 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2735 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2736 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
2737 if (return_code == IO_OK) {
2738 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2739 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2740 } else { /* read capacity command failed */
2741 printk(KERN_WARNING "cciss: read capacity failed\n");
2743 *block_size = BLOCK_SIZE;
2748 static void cciss_read_capacity_16(int ctlr, int logvol,
2749 sector_t *total_size, unsigned int *block_size)
2751 ReadCapdata_struct_16 *buf;
2753 unsigned char scsi3addr[8];
2755 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2757 printk(KERN_WARNING "cciss: out of memory\n");
2761 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2762 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2763 ctlr, buf, sizeof(ReadCapdata_struct_16),
2764 0, scsi3addr, TYPE_CMD);
2765 if (return_code == IO_OK) {
2766 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2767 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2768 } else { /* read capacity command failed */
2769 printk(KERN_WARNING "cciss: read capacity failed\n");
2771 *block_size = BLOCK_SIZE;
2773 printk(KERN_INFO " blocks= %llu block_size= %d\n",
2774 (unsigned long long)*total_size+1, *block_size);
2778 static int cciss_revalidate(struct gendisk *disk)
2780 ctlr_info_t *h = get_host(disk);
2781 drive_info_struct *drv = get_drv(disk);
2784 unsigned int block_size;
2785 sector_t total_size;
2786 InquiryData_struct *inq_buff = NULL;
2788 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2789 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
2790 sizeof(drv->LunID)) == 0) {
2799 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2800 if (inq_buff == NULL) {
2801 printk(KERN_WARNING "cciss: out of memory\n");
2804 if (h->cciss_read == CCISS_READ_10) {
2805 cciss_read_capacity(h->ctlr, logvol,
2806 &total_size, &block_size);
2808 cciss_read_capacity_16(h->ctlr, logvol,
2809 &total_size, &block_size);
2811 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
2814 blk_queue_logical_block_size(drv->queue, drv->block_size);
2815 set_capacity(disk, drv->nr_blocks);
2822 * Map (physical) PCI mem into (virtual) kernel space
2824 static void __iomem *remap_pci_mem(ulong base, ulong size)
2826 ulong page_base = ((ulong) base) & PAGE_MASK;
2827 ulong page_offs = ((ulong) base) - page_base;
2828 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2830 return page_remapped ? (page_remapped + page_offs) : NULL;
2834 * Takes jobs of the Q and sends them to the hardware, then puts it on
2835 * the Q to wait for completion.
2837 static void start_io(ctlr_info_t *h)
2839 CommandList_struct *c;
2841 while (!hlist_empty(&h->reqQ)) {
2842 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
2843 /* can't do anything if fifo is full */
2844 if ((h->access.fifo_full(h))) {
2845 printk(KERN_WARNING "cciss: fifo full\n");
2849 /* Get the first entry from the Request Q */
2853 /* Tell the controller execute command */
2854 h->access.submit_command(h, c);
2856 /* Put job onto the completed Q */
2861 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2862 /* Zeros out the error record and then resends the command back */
2863 /* to the controller */
2864 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
2866 /* erase the old error information */
2867 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2869 /* add it to software queue and then send it to the controller */
2872 if (h->Qdepth > h->maxQsinceinit)
2873 h->maxQsinceinit = h->Qdepth;
2878 static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2879 unsigned int msg_byte, unsigned int host_byte,
2880 unsigned int driver_byte)
2882 /* inverse of macros in scsi.h */
2883 return (scsi_status_byte & 0xff) |
2884 ((msg_byte & 0xff) << 8) |
2885 ((host_byte & 0xff) << 16) |
2886 ((driver_byte & 0xff) << 24);
2889 static inline int evaluate_target_status(ctlr_info_t *h,
2890 CommandList_struct *cmd, int *retry_cmd)
2892 unsigned char sense_key;
2893 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2897 /* If we get in here, it means we got "target status", that is, scsi status */
2898 status_byte = cmd->err_info->ScsiStatus;
2899 driver_byte = DRIVER_OK;
2900 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2902 if (blk_pc_request(cmd->rq))
2903 host_byte = DID_PASSTHROUGH;
2907 error_value = make_status_bytes(status_byte, msg_byte,
2908 host_byte, driver_byte);
2910 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
2911 if (!blk_pc_request(cmd->rq))
2912 printk(KERN_WARNING "cciss: cmd %p "
2913 "has SCSI Status 0x%x\n",
2914 cmd, cmd->err_info->ScsiStatus);
2918 /* check the sense key */
2919 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2920 /* no status or recovered error */
2921 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2924 if (check_for_unit_attention(h, cmd)) {
2925 *retry_cmd = !blk_pc_request(cmd->rq);
2929 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
2930 if (error_value != 0)
2931 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2932 " sense key = 0x%x\n", cmd, sense_key);
2936 /* SG_IO or similar, copy sense data back */
2937 if (cmd->rq->sense) {
2938 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2939 cmd->rq->sense_len = cmd->err_info->SenseLen;
2940 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2941 cmd->rq->sense_len);
2943 cmd->rq->sense_len = 0;
2948 /* checks the status of the job and calls complete buffers to mark all
2949 * buffers for the completed job. Note that this function does not need
2950 * to hold the hba/queue lock.
2952 static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2956 struct request *rq = cmd->rq;
2961 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
2963 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2964 goto after_error_processing;
2966 switch (cmd->err_info->CommandStatus) {
2967 case CMD_TARGET_STATUS:
2968 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
2970 case CMD_DATA_UNDERRUN:
2971 if (blk_fs_request(cmd->rq)) {
2972 printk(KERN_WARNING "cciss: cmd %p has"
2973 " completed with data underrun "
2975 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
2978 case CMD_DATA_OVERRUN:
2979 if (blk_fs_request(cmd->rq))
2980 printk(KERN_WARNING "cciss: cmd %p has"
2981 " completed with data overrun "
2985 printk(KERN_WARNING "cciss: cmd %p is "
2986 "reported invalid\n", cmd);
2987 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2988 cmd->err_info->CommandStatus, DRIVER_OK,
2989 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2991 case CMD_PROTOCOL_ERR:
2992 printk(KERN_WARNING "cciss: cmd %p has "
2993 "protocol error \n", cmd);
2994 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2995 cmd->err_info->CommandStatus, DRIVER_OK,
2996 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2998 case CMD_HARDWARE_ERR:
2999 printk(KERN_WARNING "cciss: cmd %p had "
3000 " hardware error\n", cmd);
3001 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3002 cmd->err_info->CommandStatus, DRIVER_OK,
3003 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3005 case CMD_CONNECTION_LOST:
3006 printk(KERN_WARNING "cciss: cmd %p had "
3007 "connection lost\n", cmd);
3008 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3009 cmd->err_info->CommandStatus, DRIVER_OK,
3010 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3013 printk(KERN_WARNING "cciss: cmd %p was "
3015 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3016 cmd->err_info->CommandStatus, DRIVER_OK,
3017 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
3019 case CMD_ABORT_FAILED:
3020 printk(KERN_WARNING "cciss: cmd %p reports "
3021 "abort failed\n", cmd);
3022 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3023 cmd->err_info->CommandStatus, DRIVER_OK,
3024 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3026 case CMD_UNSOLICITED_ABORT:
3027 printk(KERN_WARNING "cciss%d: unsolicited "
3028 "abort %p\n", h->ctlr, cmd);
3029 if (cmd->retry_count < MAX_CMD_RETRIES) {
3032 "cciss%d: retrying %p\n", h->ctlr, cmd);
3036 "cciss%d: %p retried too "
3037 "many times\n", h->ctlr, cmd);
3038 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3039 cmd->err_info->CommandStatus, DRIVER_OK,
3040 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
3043 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
3044 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3045 cmd->err_info->CommandStatus, DRIVER_OK,
3046 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3049 printk(KERN_WARNING "cciss: cmd %p returned "
3050 "unknown status %x\n", cmd,
3051 cmd->err_info->CommandStatus);
3052 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3053 cmd->err_info->CommandStatus, DRIVER_OK,
3054 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3057 after_error_processing:
3059 /* We need to return this command */
3061 resend_cciss_cmd(h, cmd);
3064 cmd->rq->completion_data = cmd;
3065 blk_complete_request(cmd->rq);
3069 * Get a request and submit it to the controller.
3071 static void do_cciss_request(struct request_queue *q)
3073 ctlr_info_t *h = q->queuedata;
3074 CommandList_struct *c;
3077 struct request *creq;
3079 struct scatterlist *tmp_sg;
3080 SGDescriptor_struct *curr_sg;
3081 drive_info_struct *drv;
3087 /* We call start_io here in case there is a command waiting on the
3088 * queue that has not been sent.
3090 if (blk_queue_plugged(q))
3094 creq = blk_peek_request(q);
3098 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
3100 if ((c = cmd_alloc(h, 1)) == NULL)
3103 blk_start_request(creq);
3105 tmp_sg = h->scatter_list[c->cmdindex];
3106 spin_unlock_irq(q->queue_lock);
3108 c->cmd_type = CMD_RWREQ;
3111 /* fill in the request */
3112 drv = creq->rq_disk->private_data;
3113 c->Header.ReplyQueue = 0; /* unused in simple mode */
3114 /* got command from pool, so use the command block index instead */
3115 /* for direct lookups. */
3116 /* The first 2 bits are reserved for controller error reporting. */
3117 c->Header.Tag.lower = (c->cmdindex << 3);
3118 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
3119 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
3120 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3121 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
3122 c->Request.Type.Attribute = ATTR_SIMPLE;
3123 c->Request.Type.Direction =
3124 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
3125 c->Request.Timeout = 0; /* Don't time out */
3127 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
3128 start_blk = blk_rq_pos(creq);
3130 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3131 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
3132 #endif /* CCISS_DEBUG */
3134 sg_init_table(tmp_sg, h->maxsgentries);
3135 seg = blk_rq_map_sg(q, creq, tmp_sg);
3137 /* get the DMA records for the setup */
3138 if (c->Request.Type.Direction == XFER_READ)
3139 dir = PCI_DMA_FROMDEVICE;
3141 dir = PCI_DMA_TODEVICE;
3147 for (i = 0; i < seg; i++) {
3148 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3149 !chained && ((seg - i) > 1)) {
3151 curr_sg[sg_index].Len = (nseg) *
3152 sizeof(SGDescriptor_struct);
3153 curr_sg[sg_index].Ext = CCISS_SG_CHAIN;
3155 /* Point to next chain block. */
3156 curr_sg = h->cmd_sg_list[c->cmdindex]->sgchain;
3160 curr_sg[sg_index].Len = tmp_sg[i].length;
3161 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
3163 tmp_sg[i].length, dir);
3164 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3165 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3166 curr_sg[sg_index].Ext = 0; /* we are not chaining */
3174 sg_index = h->max_cmd_sgentries - 1;
3175 len = curr_sg[sg_index].Len;
3176 /* Setup pointer to next chain block.
3177 * Fill out last element in current chain
3178 * block with address of next chain block.
3180 temp64.val = pci_map_single(h->pdev,
3181 h->cmd_sg_list[c->cmdindex]->sgchain,
3184 h->cmd_sg_list[c->cmdindex]->sg_chain_dma = temp64.val;
3185 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3186 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3188 pci_dma_sync_single_for_device(h->pdev,
3189 h->cmd_sg_list[c->cmdindex]->sg_chain_dma,
3193 /* track how many SG entries we are using */
3198 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3200 blk_rq_sectors(creq), seg, chained);
3201 #endif /* CCISS_DEBUG */
3203 c->Header.SGList = c->Header.SGTotal = seg + chained;
3204 if (seg > h->max_cmd_sgentries)
3205 c->Header.SGList = h->max_cmd_sgentries;
3207 if (likely(blk_fs_request(creq))) {
3208 if(h->cciss_read == CCISS_READ_10) {
3209 c->Request.CDB[1] = 0;
3210 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
3211 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3212 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3213 c->Request.CDB[5] = start_blk & 0xff;
3214 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
3215 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3216 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
3217 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3219 u32 upper32 = upper_32_bits(start_blk);
3221 c->Request.CDBLen = 16;
3222 c->Request.CDB[1]= 0;
3223 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
3224 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3225 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3226 c->Request.CDB[5]= upper32 & 0xff;
3227 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3228 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3229 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3230 c->Request.CDB[9]= start_blk & 0xff;
3231 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3232 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3233 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3234 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
3235 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3237 } else if (blk_pc_request(creq)) {
3238 c->Request.CDBLen = creq->cmd_len;
3239 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
3241 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3245 spin_lock_irq(q->queue_lock);
3249 if (h->Qdepth > h->maxQsinceinit)
3250 h->maxQsinceinit = h->Qdepth;
3256 /* We will already have the driver lock here so not need
3262 static inline unsigned long get_next_completion(ctlr_info_t *h)
3264 return h->access.command_completed(h);
3267 static inline int interrupt_pending(ctlr_info_t *h)
3269 return h->access.intr_pending(h);
3272 static inline long interrupt_not_for_us(ctlr_info_t *h)
3274 return (((h->access.intr_pending(h) == 0) ||
3275 (h->interrupts_enabled == 0)));
3278 static irqreturn_t do_cciss_intr(int irq, void *dev_id)
3280 ctlr_info_t *h = dev_id;
3281 CommandList_struct *c;
3282 unsigned long flags;
3285 if (interrupt_not_for_us(h))
3288 * If there are completed commands in the completion queue,
3289 * we had better do something about it.
3291 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3292 while (interrupt_pending(h)) {
3293 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
3297 if (a2 >= h->nr_cmds) {
3299 "cciss: controller cciss%d failed, stopping.\n",
3301 fail_all_cmds(h->ctlr);
3305 c = h->cmd_pool + a2;
3309 struct hlist_node *tmp;
3313 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3314 if (c->busaddr == a)
3319 * If we've found the command, take it off the
3320 * completion Q and free it
3322 if (c && c->busaddr == a) {
3324 if (c->cmd_type == CMD_RWREQ) {
3325 complete_command(h, c, 0);
3326 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3327 complete(c->waiting);
3329 # ifdef CONFIG_CISS_SCSI_TAPE
3330 else if (c->cmd_type == CMD_SCSI)
3331 complete_scsi_command(c, 0, a1);
3338 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3343 * add_to_scan_list() - add controller to rescan queue
3344 * @h: Pointer to the controller.
3346 * Adds the controller to the rescan queue if not already on the queue.
3348 * returns 1 if added to the queue, 0 if skipped (could be on the
3349 * queue already, or the controller could be initializing or shutting
3352 static int add_to_scan_list(struct ctlr_info *h)
3354 struct ctlr_info *test_h;
3358 if (h->busy_initializing)
3361 if (!mutex_trylock(&h->busy_shutting_down))
3364 mutex_lock(&scan_mutex);
3365 list_for_each_entry(test_h, &scan_q, scan_list) {
3371 if (!found && !h->busy_scanning) {
3372 INIT_COMPLETION(h->scan_wait);
3373 list_add_tail(&h->scan_list, &scan_q);
3376 mutex_unlock(&scan_mutex);
3377 mutex_unlock(&h->busy_shutting_down);
3383 * remove_from_scan_list() - remove controller from rescan queue
3384 * @h: Pointer to the controller.
3386 * Removes the controller from the rescan queue if present. Blocks if
3387 * the controller is currently conducting a rescan. The controller
3388 * can be in one of three states:
3389 * 1. Doesn't need a scan
3390 * 2. On the scan list, but not scanning yet (we remove it)
3391 * 3. Busy scanning (and not on the list). In this case we want to wait for
3392 * the scan to complete to make sure the scanning thread for this
3393 * controller is completely idle.
3395 static void remove_from_scan_list(struct ctlr_info *h)
3397 struct ctlr_info *test_h, *tmp_h;
3399 mutex_lock(&scan_mutex);
3400 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3401 if (test_h == h) { /* state 2. */
3402 list_del(&h->scan_list);
3403 complete_all(&h->scan_wait);
3404 mutex_unlock(&scan_mutex);
3408 if (h->busy_scanning) { /* state 3. */
3409 mutex_unlock(&scan_mutex);
3410 wait_for_completion(&h->scan_wait);
3411 } else { /* state 1, nothing to do. */
3412 mutex_unlock(&scan_mutex);
3417 * scan_thread() - kernel thread used to rescan controllers
3420 * A kernel thread used scan for drive topology changes on
3421 * controllers. The thread processes only one controller at a time
3422 * using a queue. Controllers are added to the queue using
3423 * add_to_scan_list() and removed from the queue either after done
3424 * processing or using remove_from_scan_list().
3428 static int scan_thread(void *data)
3430 struct ctlr_info *h;
3433 set_current_state(TASK_INTERRUPTIBLE);
3435 if (kthread_should_stop())
3439 mutex_lock(&scan_mutex);
3440 if (list_empty(&scan_q)) {
3441 mutex_unlock(&scan_mutex);
3445 h = list_entry(scan_q.next,
3448 list_del(&h->scan_list);
3449 h->busy_scanning = 1;
3450 mutex_unlock(&scan_mutex);
3452 rebuild_lun_table(h, 0, 0);
3453 complete_all(&h->scan_wait);
3454 mutex_lock(&scan_mutex);
3455 h->busy_scanning = 0;
3456 mutex_unlock(&scan_mutex);
3463 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3465 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3468 switch (c->err_info->SenseInfo[12]) {
3470 printk(KERN_WARNING "cciss%d: a state change "
3471 "detected, command retried\n", h->ctlr);
3475 printk(KERN_WARNING "cciss%d: LUN failure "
3476 "detected, action required\n", h->ctlr);
3479 case REPORT_LUNS_CHANGED:
3480 printk(KERN_WARNING "cciss%d: report LUN data "
3481 "changed\n", h->ctlr);
3483 * Here, we could call add_to_scan_list and wake up the scan thread,
3484 * except that it's quite likely that we will get more than one
3485 * REPORT_LUNS_CHANGED condition in quick succession, which means
3486 * that those which occur after the first one will likely happen
3487 * *during* the scan_thread's rescan. And the rescan code is not
3488 * robust enough to restart in the middle, undoing what it has already
3489 * done, and it's not clear that it's even possible to do this, since
3490 * part of what it does is notify the block layer, which starts
3491 * doing it's own i/o to read partition tables and so on, and the
3492 * driver doesn't have visibility to know what might need undoing.
3493 * In any event, if possible, it is horribly complicated to get right
3494 * so we just don't do it for now.
3496 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3500 case POWER_OR_RESET:
3501 printk(KERN_WARNING "cciss%d: a power on "
3502 "or device reset detected\n", h->ctlr);
3505 case UNIT_ATTENTION_CLEARED:
3506 printk(KERN_WARNING "cciss%d: unit attention "
3507 "cleared by another initiator\n", h->ctlr);
3511 printk(KERN_WARNING "cciss%d: unknown "
3512 "unit attention detected\n", h->ctlr);
3518 * We cannot read the structure directly, for portability we must use
3520 * This is for debug only.
3523 static void print_cfg_table(CfgTable_struct *tb)
3528 printk("Controller Configuration information\n");
3529 printk("------------------------------------\n");
3530 for (i = 0; i < 4; i++)
3531 temp_name[i] = readb(&(tb->Signature[i]));
3532 temp_name[4] = '\0';
3533 printk(" Signature = %s\n", temp_name);
3534 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
3535 printk(" Transport methods supported = 0x%x\n",
3536 readl(&(tb->TransportSupport)));
3537 printk(" Transport methods active = 0x%x\n",
3538 readl(&(tb->TransportActive)));
3539 printk(" Requested transport Method = 0x%x\n",
3540 readl(&(tb->HostWrite.TransportRequest)));
3541 printk(" Coalesce Interrupt Delay = 0x%x\n",
3542 readl(&(tb->HostWrite.CoalIntDelay)));
3543 printk(" Coalesce Interrupt Count = 0x%x\n",
3544 readl(&(tb->HostWrite.CoalIntCount)));
3545 printk(" Max outstanding commands = 0x%d\n",
3546 readl(&(tb->CmdsOutMax)));
3547 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3548 for (i = 0; i < 16; i++)
3549 temp_name[i] = readb(&(tb->ServerName[i]));
3550 temp_name[16] = '\0';
3551 printk(" Server Name = %s\n", temp_name);
3552 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
3554 #endif /* CCISS_DEBUG */
3556 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3558 int i, offset, mem_type, bar_type;
3559 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3562 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3563 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3564 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3567 mem_type = pci_resource_flags(pdev, i) &
3568 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3570 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3571 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3572 offset += 4; /* 32 bit */
3574 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3577 default: /* reserved in PCI 2.2 */
3579 "Base address is invalid\n");
3584 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3590 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3591 * controllers that are capable. If not, we use IO-APIC mode.
3594 static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3595 struct pci_dev *pdev, __u32 board_id)
3597 #ifdef CONFIG_PCI_MSI
3599 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3603 /* Some boards advertise MSI but don't really support it */
3604 if ((board_id == 0x40700E11) ||
3605 (board_id == 0x40800E11) ||
3606 (board_id == 0x40820E11) || (board_id == 0x40830E11))
3607 goto default_int_mode;
3609 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3610 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3612 c->intr[0] = cciss_msix_entries[0].vector;
3613 c->intr[1] = cciss_msix_entries[1].vector;
3614 c->intr[2] = cciss_msix_entries[2].vector;
3615 c->intr[3] = cciss_msix_entries[3].vector;
3620 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3621 "available\n", err);
3622 goto default_int_mode;
3624 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3626 goto default_int_mode;
3629 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3630 if (!pci_enable_msi(pdev)) {
3633 printk(KERN_WARNING "cciss: MSI init failed\n");
3637 #endif /* CONFIG_PCI_MSI */
3638 /* if we get here we're going to use the default interrupt mode */
3639 c->intr[SIMPLE_MODE_INT] = pdev->irq;
3643 static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
3645 ushort subsystem_vendor_id, subsystem_device_id, command;
3646 __u32 board_id, scratchpad = 0;
3648 __u32 cfg_base_addr;
3649 __u64 cfg_base_addr_index;
3650 int i, prod_index, err;
3652 subsystem_vendor_id = pdev->subsystem_vendor;
3653 subsystem_device_id = pdev->subsystem_device;
3654 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3655 subsystem_vendor_id);
3657 for (i = 0; i < ARRAY_SIZE(products); i++) {
3658 /* Stand aside for hpsa driver on request */
3659 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3661 if (board_id == products[i].board_id)
3665 if (prod_index == ARRAY_SIZE(products)) {
3666 dev_warn(&pdev->dev,
3667 "unrecognized board ID: 0x%08lx, ignoring.\n",
3668 (unsigned long) board_id);
3672 /* check to see if controller has been disabled */
3673 /* BEFORE trying to enable it */
3674 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3675 if (!(command & 0x02)) {
3677 "cciss: controller appears to be disabled\n");
3681 err = pci_enable_device(pdev);
3683 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
3687 err = pci_request_regions(pdev, "cciss");
3689 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
3695 printk("command = %x\n", command);
3696 printk("irq = %x\n", pdev->irq);
3697 printk("board_id = %x\n", board_id);
3698 #endif /* CCISS_DEBUG */
3700 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3701 * else we use the IO-APIC interrupt assigned to us by system ROM.
3703 cciss_interrupt_mode(c, pdev, board_id);
3705 /* find the memory BAR */
3706 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3707 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3710 if (i == DEVICE_COUNT_RESOURCE) {
3711 printk(KERN_WARNING "cciss: No memory BAR found\n");
3713 goto err_out_free_res;
3716 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3721 printk("address 0 = %lx\n", c->paddr);
3722 #endif /* CCISS_DEBUG */
3723 c->vaddr = remap_pci_mem(c->paddr, 0x250);
3725 /* Wait for the board to become ready. (PCI hotplug needs this.)
3726 * We poll for up to 120 secs, once per 100ms. */
3727 for (i = 0; i < 1200; i++) {
3728 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3729 if (scratchpad == CCISS_FIRMWARE_READY)
3731 set_current_state(TASK_INTERRUPTIBLE);
3732 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
3734 if (scratchpad != CCISS_FIRMWARE_READY) {
3735 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
3737 goto err_out_free_res;
3740 /* get the address index number */
3741 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3742 cfg_base_addr &= (__u32) 0x0000ffff;
3744 printk("cfg base address = %x\n", cfg_base_addr);
3745 #endif /* CCISS_DEBUG */
3746 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
3748 printk("cfg base address index = %llx\n",
3749 (unsigned long long)cfg_base_addr_index);
3750 #endif /* CCISS_DEBUG */
3751 if (cfg_base_addr_index == -1) {
3752 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
3754 goto err_out_free_res;
3757 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3759 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
3760 #endif /* CCISS_DEBUG */
3761 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3762 cfg_base_addr_index) +
3763 cfg_offset, sizeof(CfgTable_struct));
3764 c->board_id = board_id;
3767 print_cfg_table(c->cfgtable);
3768 #endif /* CCISS_DEBUG */
3770 /* Some controllers support Zero Memory Raid (ZMR).
3771 * When configured in ZMR mode the number of supported
3772 * commands drops to 64. So instead of just setting an
3773 * arbitrary value we make the driver a little smarter.
3774 * We read the config table to tell us how many commands
3775 * are supported on the controller then subtract 4 to
3776 * leave a little room for ioctl calls.
3778 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
3779 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
3782 * Limit native command to 32 s/g elements to save dma'able memory.
3783 * Howvever spec says if 0, use 31
3786 c->max_cmd_sgentries = 31;
3787 if (c->maxsgentries > 512) {
3788 c->max_cmd_sgentries = 32;
3789 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
3790 c->maxsgentries -= 1; /* account for chain pointer */
3792 c->maxsgentries = 31; /* Default to traditional value */
3793 c->chainsize = 0; /* traditional */
3796 c->product_name = products[prod_index].product_name;
3797 c->access = *(products[prod_index].access);
3798 c->nr_cmds = c->max_commands - 4;
3799 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3800 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3801 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3802 (readb(&c->cfgtable->Signature[3]) != 'S')) {
3803 printk("Does not appear to be a valid CISS config table\n");
3805 goto err_out_free_res;
3809 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3811 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3813 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3817 /* Disabling DMA prefetch and refetch for the P600.
3818 * An ASIC bug may result in accesses to invalid memory addresses.
3819 * We've disabled prefetch for some time now. Testing with XEN
3820 * kernels revealed a bug in the refetch if dom0 resides on a P600.
3822 if(board_id == 0x3225103C) {
3825 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3826 dma_prefetch |= 0x8000;
3827 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
3828 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3830 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
3834 printk("Trying to put board into Simple mode\n");
3835 #endif /* CCISS_DEBUG */
3836 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
3837 /* Update the field, and then ring the doorbell */
3838 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3839 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
3841 /* under certain very rare conditions, this can take awhile.
3842 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3843 * as we enter this code.) */
3844 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3845 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3847 /* delay and try again */
3848 set_current_state(TASK_INTERRUPTIBLE);
3849 schedule_timeout(msecs_to_jiffies(1));
3853 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3854 readl(c->vaddr + SA5_DOORBELL));
3855 #endif /* CCISS_DEBUG */
3857 print_cfg_table(c->cfgtable);
3858 #endif /* CCISS_DEBUG */
3860 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3861 printk(KERN_WARNING "cciss: unable to get board into"
3864 goto err_out_free_res;
3870 * Deliberately omit pci_disable_device(): it does something nasty to
3871 * Smart Array controllers that pci_enable_device does not undo
3873 pci_release_regions(pdev);
3877 /* Function to find the first free pointer into our hba[] array
3878 * Returns -1 if no free entries are left.
3880 static int alloc_cciss_hba(void)
3884 for (i = 0; i < MAX_CTLR; i++) {
3888 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
3895 printk(KERN_WARNING "cciss: This driver supports a maximum"
3896 " of %d controllers.\n", MAX_CTLR);
3899 printk(KERN_ERR "cciss: out of memory.\n");
3903 static void free_hba(int n)
3905 ctlr_info_t *h = hba[n];
3909 for (i = 0; i < h->highest_lun + 1; i++)
3910 if (h->gendisk[i] != NULL)
3911 put_disk(h->gendisk[i]);
3915 /* Send a message CDB to the firmware. */
3916 static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3919 CommandListHeader_struct CommandHeader;
3920 RequestBlock_struct Request;
3921 ErrDescriptor_struct ErrorDescriptor;
3923 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3926 uint32_t paddr32, tag;
3927 void __iomem *vaddr;
3930 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3934 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3935 CCISS commands, so they must be allocated from the lower 4GiB of
3937 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3943 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3949 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3950 although there's no guarantee, we assume that the address is at
3951 least 4-byte aligned (most likely, it's page-aligned). */
3954 cmd->CommandHeader.ReplyQueue = 0;
3955 cmd->CommandHeader.SGList = 0;
3956 cmd->CommandHeader.SGTotal = 0;
3957 cmd->CommandHeader.Tag.lower = paddr32;
3958 cmd->CommandHeader.Tag.upper = 0;
3959 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3961 cmd->Request.CDBLen = 16;
3962 cmd->Request.Type.Type = TYPE_MSG;
3963 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3964 cmd->Request.Type.Direction = XFER_NONE;
3965 cmd->Request.Timeout = 0; /* Don't time out */
3966 cmd->Request.CDB[0] = opcode;
3967 cmd->Request.CDB[1] = type;
3968 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3970 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3971 cmd->ErrorDescriptor.Addr.upper = 0;
3972 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3974 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3976 for (i = 0; i < 10; i++) {
3977 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3978 if ((tag & ~3) == paddr32)
3980 schedule_timeout_uninterruptible(HZ);
3985 /* we leak the DMA buffer here ... no choice since the controller could
3986 still complete the command. */
3988 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3993 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3996 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4001 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4006 #define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4007 #define cciss_noop(p) cciss_message(p, 3, 0)
4009 static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4011 /* the #defines are stolen from drivers/pci/msi.h. */
4012 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4013 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4018 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4020 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4021 if (control & PCI_MSI_FLAGS_ENABLE) {
4022 printk(KERN_INFO "cciss: resetting MSI\n");
4023 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4027 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4029 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4030 if (control & PCI_MSIX_FLAGS_ENABLE) {
4031 printk(KERN_INFO "cciss: resetting MSI-X\n");
4032 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4039 /* This does a hard reset of the controller using PCI power management
4041 static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4043 u16 pmcsr, saved_config_space[32];
4046 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4048 /* This is very nearly the same thing as
4050 pci_save_state(pci_dev);
4051 pci_set_power_state(pci_dev, PCI_D3hot);
4052 pci_set_power_state(pci_dev, PCI_D0);
4053 pci_restore_state(pci_dev);
4055 but we can't use these nice canned kernel routines on
4056 kexec, because they also check the MSI/MSI-X state in PCI
4057 configuration space and do the wrong thing when it is
4058 set/cleared. Also, the pci_save/restore_state functions
4059 violate the ordering requirements for restoring the
4060 configuration space from the CCISS document (see the
4061 comment below). So we roll our own .... */
4063 for (i = 0; i < 32; i++)
4064 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4066 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4068 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4072 /* Quoting from the Open CISS Specification: "The Power
4073 * Management Control/Status Register (CSR) controls the power
4074 * state of the device. The normal operating state is D0,
4075 * CSR=00h. The software off state is D3, CSR=03h. To reset
4076 * the controller, place the interface device in D3 then to
4077 * D0, this causes a secondary PCI reset which will reset the
4080 /* enter the D3hot power management state */
4081 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4082 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4084 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4086 schedule_timeout_uninterruptible(HZ >> 1);
4088 /* enter the D0 power management state */
4089 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4091 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4093 schedule_timeout_uninterruptible(HZ >> 1);
4095 /* Restore the PCI configuration space. The Open CISS
4096 * Specification says, "Restore the PCI Configuration
4097 * Registers, offsets 00h through 60h. It is important to
4098 * restore the command register, 16-bits at offset 04h,
4099 * last. Do not restore the configuration status register,
4100 * 16-bits at offset 06h." Note that the offset is 2*i. */
4101 for (i = 0; i < 32; i++) {
4102 if (i == 2 || i == 3)
4104 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4107 pci_write_config_word(pdev, 4, saved_config_space[2]);
4113 * This is it. Find all the controllers and register them. I really hate
4114 * stealing all these major device numbers.
4115 * returns the number of block devices registered.
4117 static int __devinit cciss_init_one(struct pci_dev *pdev,
4118 const struct pci_device_id *ent)
4124 int dac, return_code;
4125 InquiryData_struct *inq_buff;
4127 if (reset_devices) {
4128 /* Reset the controller with a PCI power-cycle */
4129 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4132 /* Now try to get the controller to respond to a no-op. Some
4133 devices (notably the HP Smart Array 5i Controller) need
4134 up to 30 seconds to respond. */
4135 for (i=0; i<30; i++) {
4136 if (cciss_noop(pdev) == 0)
4139 schedule_timeout_uninterruptible(HZ);
4142 printk(KERN_ERR "cciss: controller seems dead\n");
4147 i = alloc_cciss_hba();
4151 hba[i]->busy_initializing = 1;
4152 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4153 INIT_HLIST_HEAD(&hba[i]->reqQ);
4154 mutex_init(&hba[i]->busy_shutting_down);
4156 if (cciss_pci_init(hba[i], pdev) != 0)
4157 goto clean_no_release_regions;
4159 sprintf(hba[i]->devname, "cciss%d", i);
4161 hba[i]->pdev = pdev;
4163 init_completion(&hba[i]->scan_wait);
4165 if (cciss_create_hba_sysfs_entry(hba[i]))
4168 /* configure PCI DMA stuff */
4169 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
4171 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
4174 printk(KERN_ERR "cciss: no suitable DMA available\n");
4179 * register with the major number, or get a dynamic major number
4180 * by passing 0 as argument. This is done for greater than
4181 * 8 controller support.
4183 if (i < MAX_CTLR_ORIG)
4184 hba[i]->major = COMPAQ_CISS_MAJOR + i;
4185 rc = register_blkdev(hba[i]->major, hba[i]->devname);
4186 if (rc == -EBUSY || rc == -EINVAL) {
4188 "cciss: Unable to get major number %d for %s "
4189 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
4192 if (i >= MAX_CTLR_ORIG)
4196 /* make sure the board interrupts are off */
4197 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
4198 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
4199 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
4200 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
4201 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
4205 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
4206 hba[i]->devname, pdev->device, pci_name(pdev),
4207 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4209 hba[i]->cmd_pool_bits =
4210 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4211 * sizeof(unsigned long), GFP_KERNEL);
4212 hba[i]->cmd_pool = (CommandList_struct *)
4213 pci_alloc_consistent(hba[i]->pdev,
4214 hba[i]->nr_cmds * sizeof(CommandList_struct),
4215 &(hba[i]->cmd_pool_dhandle));
4216 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4217 pci_alloc_consistent(hba[i]->pdev,
4218 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4219 &(hba[i]->errinfo_pool_dhandle));
4220 if ((hba[i]->cmd_pool_bits == NULL)
4221 || (hba[i]->cmd_pool == NULL)
4222 || (hba[i]->errinfo_pool == NULL)) {
4223 printk(KERN_ERR "cciss: out of memory");
4227 /* Need space for temp scatter list */
4228 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4229 sizeof(struct scatterlist *),
4231 for (k = 0; k < hba[i]->nr_cmds; k++) {
4232 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4233 hba[i]->maxsgentries,
4235 if (hba[i]->scatter_list[k] == NULL) {
4236 printk(KERN_ERR "cciss%d: could not allocate "
4241 hba[i]->cmd_sg_list = kmalloc(sizeof(struct Cmd_sg_list *) *
4244 if (!hba[i]->cmd_sg_list) {
4245 printk(KERN_ERR "cciss%d: Cannot get memory for "
4246 "s/g chaining.\n", i);
4249 /* Build up chain blocks for each command */
4250 if (hba[i]->chainsize > 0) {
4251 for (j = 0; j < hba[i]->nr_cmds; j++) {
4252 hba[i]->cmd_sg_list[j] =
4253 kmalloc(sizeof(struct Cmd_sg_list),
4255 if (!hba[i]->cmd_sg_list[j]) {
4256 printk(KERN_ERR "cciss%d: Cannot get memory "
4257 "for chain block.\n", i);
4260 /* Need a block of chainsized s/g elements. */
4261 hba[i]->cmd_sg_list[j]->sgchain =
4262 kmalloc((hba[i]->chainsize *
4263 sizeof(SGDescriptor_struct)),
4265 if (!hba[i]->cmd_sg_list[j]->sgchain) {
4266 printk(KERN_ERR "cciss%d: Cannot get memory "
4267 "for s/g chains\n", i);
4273 spin_lock_init(&hba[i]->lock);
4275 /* Initialize the pdev driver private data.
4276 have it point to hba[i]. */
4277 pci_set_drvdata(pdev, hba[i]);
4278 /* command and error info recs zeroed out before
4280 memset(hba[i]->cmd_pool_bits, 0,
4281 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4282 * sizeof(unsigned long));
4284 hba[i]->num_luns = 0;
4285 hba[i]->highest_lun = -1;
4286 for (j = 0; j < CISS_MAX_LUN; j++) {
4287 hba[i]->drv[j] = NULL;
4288 hba[i]->gendisk[j] = NULL;
4291 cciss_scsi_setup(i);
4293 /* Turn the interrupts on so we can service requests */
4294 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4296 /* Get the firmware version */
4297 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4298 if (inq_buff == NULL) {
4299 printk(KERN_ERR "cciss: out of memory\n");
4303 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
4304 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
4305 if (return_code == IO_OK) {
4306 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4307 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4308 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4309 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4310 } else { /* send command failed */
4311 printk(KERN_WARNING "cciss: unable to determine firmware"
4312 " version of controller\n");
4318 hba[i]->cciss_max_sectors = 8192;
4320 rebuild_lun_table(hba[i], 1, 0);
4321 hba[i]->busy_initializing = 0;
4325 kfree(hba[i]->cmd_pool_bits);
4326 /* Free up sg elements */
4327 for (k = 0; k < hba[i]->nr_cmds; k++)
4328 kfree(hba[i]->scatter_list[k]);
4329 kfree(hba[i]->scatter_list);
4330 /* Only free up extra s/g lists if controller supports them */
4331 if (hba[i]->chainsize > 0) {
4332 for (j = 0; j < hba[i]->nr_cmds; j++) {
4333 if (hba[i]->cmd_sg_list[j]) {
4334 kfree(hba[i]->cmd_sg_list[j]->sgchain);
4335 kfree(hba[i]->cmd_sg_list[j]);
4338 kfree(hba[i]->cmd_sg_list);
4340 if (hba[i]->cmd_pool)
4341 pci_free_consistent(hba[i]->pdev,
4342 hba[i]->nr_cmds * sizeof(CommandList_struct),
4343 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4344 if (hba[i]->errinfo_pool)
4345 pci_free_consistent(hba[i]->pdev,
4346 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4347 hba[i]->errinfo_pool,
4348 hba[i]->errinfo_pool_dhandle);
4349 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
4351 unregister_blkdev(hba[i]->major, hba[i]->devname);
4353 cciss_destroy_hba_sysfs_entry(hba[i]);
4355 pci_release_regions(pdev);
4356 clean_no_release_regions:
4357 hba[i]->busy_initializing = 0;
4360 * Deliberately omit pci_disable_device(): it does something nasty to
4361 * Smart Array controllers that pci_enable_device does not undo
4363 pci_set_drvdata(pdev, NULL);
4368 static void cciss_shutdown(struct pci_dev *pdev)
4374 h = pci_get_drvdata(pdev);
4375 flush_buf = kzalloc(4, GFP_KERNEL);
4378 "cciss:%d cache not flushed, out of memory.\n",
4382 /* write all data in the battery backed cache to disk */
4383 memset(flush_buf, 0, 4);
4384 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4385 4, 0, CTLR_LUNID, TYPE_CMD);
4387 if (return_code != IO_OK)
4388 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4390 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4391 free_irq(h->intr[2], h);
4394 static void __devexit cciss_remove_one(struct pci_dev *pdev)
4396 ctlr_info_t *tmp_ptr;
4399 if (pci_get_drvdata(pdev) == NULL) {
4400 printk(KERN_ERR "cciss: Unable to remove device \n");
4404 tmp_ptr = pci_get_drvdata(pdev);
4406 if (hba[i] == NULL) {
4407 printk(KERN_ERR "cciss: device appears to "
4408 "already be removed \n");
4412 mutex_lock(&hba[i]->busy_shutting_down);
4414 remove_from_scan_list(hba[i]);
4415 remove_proc_entry(hba[i]->devname, proc_cciss);
4416 unregister_blkdev(hba[i]->major, hba[i]->devname);
4418 /* remove it from the disk list */
4419 for (j = 0; j < CISS_MAX_LUN; j++) {
4420 struct gendisk *disk = hba[i]->gendisk[j];
4422 struct request_queue *q = disk->queue;
4424 if (disk->flags & GENHD_FL_UP) {
4425 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
4429 blk_cleanup_queue(q);
4433 #ifdef CONFIG_CISS_SCSI_TAPE
4434 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
4437 cciss_shutdown(pdev);
4439 #ifdef CONFIG_PCI_MSI
4440 if (hba[i]->msix_vector)
4441 pci_disable_msix(hba[i]->pdev);
4442 else if (hba[i]->msi_vector)
4443 pci_disable_msi(hba[i]->pdev);
4444 #endif /* CONFIG_PCI_MSI */
4446 iounmap(hba[i]->vaddr);
4448 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
4449 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4450 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4451 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
4452 kfree(hba[i]->cmd_pool_bits);
4453 /* Free up sg elements */
4454 for (j = 0; j < hba[i]->nr_cmds; j++)
4455 kfree(hba[i]->scatter_list[j]);
4456 kfree(hba[i]->scatter_list);
4457 /* Only free up extra s/g lists if controller supports them */
4458 if (hba[i]->chainsize > 0) {
4459 for (j = 0; j < hba[i]->nr_cmds; j++) {
4460 if (hba[i]->cmd_sg_list[j]) {
4461 kfree(hba[i]->cmd_sg_list[j]->sgchain);
4462 kfree(hba[i]->cmd_sg_list[j]);
4465 kfree(hba[i]->cmd_sg_list);
4468 * Deliberately omit pci_disable_device(): it does something nasty to
4469 * Smart Array controllers that pci_enable_device does not undo
4471 pci_release_regions(pdev);
4472 pci_set_drvdata(pdev, NULL);
4473 cciss_destroy_hba_sysfs_entry(hba[i]);
4474 mutex_unlock(&hba[i]->busy_shutting_down);
4478 static struct pci_driver cciss_pci_driver = {
4480 .probe = cciss_init_one,
4481 .remove = __devexit_p(cciss_remove_one),
4482 .id_table = cciss_pci_device_id, /* id_table */
4483 .shutdown = cciss_shutdown,
4487 * This is it. Register the PCI driver information for the cards we control
4488 * the OS will call our registered routines when it finds one of our cards.
4490 static int __init cciss_init(void)
4495 * The hardware requires that commands are aligned on a 64-bit
4496 * boundary. Given that we use pci_alloc_consistent() to allocate an
4497 * array of them, the size must be a multiple of 8 bytes.
4499 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4501 printk(KERN_INFO DRIVER_NAME "\n");
4503 err = bus_register(&cciss_bus_type);
4507 /* Start the scan thread */
4508 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4509 if (IS_ERR(cciss_scan_thread)) {
4510 err = PTR_ERR(cciss_scan_thread);
4511 goto err_bus_unregister;
4514 /* Register for our PCI devices */
4515 err = pci_register_driver(&cciss_pci_driver);
4517 goto err_thread_stop;
4522 kthread_stop(cciss_scan_thread);
4524 bus_unregister(&cciss_bus_type);
4529 static void __exit cciss_cleanup(void)
4533 pci_unregister_driver(&cciss_pci_driver);
4534 /* double check that all controller entrys have been removed */
4535 for (i = 0; i < MAX_CTLR; i++) {
4536 if (hba[i] != NULL) {
4537 printk(KERN_WARNING "cciss: had to remove"
4538 " controller %d\n", i);
4539 cciss_remove_one(hba[i]->pdev);
4542 kthread_stop(cciss_scan_thread);
4543 remove_proc_entry("driver/cciss", NULL);
4544 bus_unregister(&cciss_bus_type);
4547 static void fail_all_cmds(unsigned long ctlr)
4549 /* If we get here, the board is apparently dead. */
4550 ctlr_info_t *h = hba[ctlr];
4551 CommandList_struct *c;
4552 unsigned long flags;
4554 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
4555 h->alive = 0; /* the controller apparently died... */
4557 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4559 pci_disable_device(h->pdev); /* Make sure it is really dead. */
4561 /* move everything off the request queue onto the completed queue */
4562 while (!hlist_empty(&h->reqQ)) {
4563 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4569 /* Now, fail everything on the completed queue with a HW error */
4570 while (!hlist_empty(&h->cmpQ)) {
4571 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4573 if (c->cmd_type != CMD_MSG_STALE)
4574 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4575 if (c->cmd_type == CMD_RWREQ) {
4576 complete_command(h, c, 0);
4577 } else if (c->cmd_type == CMD_IOCTL_PEND)
4578 complete(c->waiting);
4579 #ifdef CONFIG_CISS_SCSI_TAPE
4580 else if (c->cmd_type == CMD_SCSI)
4581 complete_scsi_command(c, 0, 0);
4584 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4588 module_init(cciss_init);
4589 module_exit(cciss_cleanup);