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 3.6.26)"
60 #define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 26)
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 Smart Array Controllers");
66 MODULE_VERSION("3.6.26");
67 MODULE_LICENSE("GPL");
69 static int cciss_allow_hpsa;
70 module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
71 MODULE_PARM_DESC(cciss_allow_hpsa,
72 "Prevent cciss driver from accessing hardware known to be "
73 " supported by the hpsa driver");
75 #include "cciss_cmd.h"
77 #include <linux/cciss_ioctl.h>
79 /* define the PCI info for the cards we can control */
80 static const struct pci_device_id cciss_pci_device_id[] = {
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3250},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3251},
110 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3252},
111 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3253},
112 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3254},
116 MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
118 /* board_id = Subsystem Device ID & Vendor ID
119 * product = Marketing Name for the board
120 * access = Address of the struct of function pointers
122 static struct board_type products[] = {
123 {0x40700E11, "Smart Array 5300", &SA5_access},
124 {0x40800E11, "Smart Array 5i", &SA5B_access},
125 {0x40820E11, "Smart Array 532", &SA5B_access},
126 {0x40830E11, "Smart Array 5312", &SA5B_access},
127 {0x409A0E11, "Smart Array 641", &SA5_access},
128 {0x409B0E11, "Smart Array 642", &SA5_access},
129 {0x409C0E11, "Smart Array 6400", &SA5_access},
130 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
131 {0x40910E11, "Smart Array 6i", &SA5_access},
132 {0x3225103C, "Smart Array P600", &SA5_access},
133 {0x3235103C, "Smart Array P400i", &SA5_access},
134 {0x3211103C, "Smart Array E200i", &SA5_access},
135 {0x3212103C, "Smart Array E200", &SA5_access},
136 {0x3213103C, "Smart Array E200i", &SA5_access},
137 {0x3214103C, "Smart Array E200i", &SA5_access},
138 {0x3215103C, "Smart Array E200i", &SA5_access},
139 {0x3237103C, "Smart Array E500", &SA5_access},
140 /* controllers below this line are also supported by the hpsa driver. */
141 #define HPSA_BOUNDARY 0x3223103C
142 {0x3223103C, "Smart Array P800", &SA5_access},
143 {0x3234103C, "Smart Array P400", &SA5_access},
144 {0x323D103C, "Smart Array P700m", &SA5_access},
145 {0x3241103C, "Smart Array P212", &SA5_access},
146 {0x3243103C, "Smart Array P410", &SA5_access},
147 {0x3245103C, "Smart Array P410i", &SA5_access},
148 {0x3247103C, "Smart Array P411", &SA5_access},
149 {0x3249103C, "Smart Array P812", &SA5_access},
150 {0x324A103C, "Smart Array P712m", &SA5_access},
151 {0x324B103C, "Smart Array P711m", &SA5_access},
152 {0x3250103C, "Smart Array", &SA5_access},
153 {0x3251103C, "Smart Array", &SA5_access},
154 {0x3252103C, "Smart Array", &SA5_access},
155 {0x3253103C, "Smart Array", &SA5_access},
156 {0x3254103C, "Smart Array", &SA5_access},
159 /* How long to wait (in milliseconds) for board to go into simple mode */
160 #define MAX_CONFIG_WAIT 30000
161 #define MAX_IOCTL_CONFIG_WAIT 1000
163 /*define how many times we will try a command because of bus resets */
164 #define MAX_CMD_RETRIES 3
168 /* Originally cciss driver only supports 8 major numbers */
169 #define MAX_CTLR_ORIG 8
171 static ctlr_info_t *hba[MAX_CTLR];
173 static struct task_struct *cciss_scan_thread;
174 static DEFINE_MUTEX(scan_mutex);
175 static LIST_HEAD(scan_q);
177 static void do_cciss_request(struct request_queue *q);
178 static irqreturn_t do_cciss_intx(int irq, void *dev_id);
179 static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id);
180 static int cciss_open(struct block_device *bdev, fmode_t mode);
181 static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode);
182 static int cciss_release(struct gendisk *disk, fmode_t mode);
183 static int do_ioctl(struct block_device *bdev, fmode_t mode,
184 unsigned int cmd, unsigned long arg);
185 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
186 unsigned int cmd, unsigned long arg);
187 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
189 static int cciss_revalidate(struct gendisk *disk);
190 static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
191 static int deregister_disk(ctlr_info_t *h, int drv_index,
192 int clear_all, int via_ioctl);
194 static void cciss_read_capacity(int ctlr, int logvol,
195 sector_t *total_size, unsigned int *block_size);
196 static void cciss_read_capacity_16(int ctlr, int logvol,
197 sector_t *total_size, unsigned int *block_size);
198 static void cciss_geometry_inquiry(int ctlr, int logvol,
200 unsigned int block_size, InquiryData_struct *inq_buff,
201 drive_info_struct *drv);
202 static void __devinit cciss_interrupt_mode(ctlr_info_t *, __u32);
203 static void start_io(ctlr_info_t *h);
204 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
205 __u8 page_code, unsigned char scsi3addr[],
207 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
209 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
211 static int add_to_scan_list(struct ctlr_info *h);
212 static int scan_thread(void *data);
213 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
214 static void cciss_hba_release(struct device *dev);
215 static void cciss_device_release(struct device *dev);
216 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
217 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
218 static inline u32 next_command(ctlr_info_t *h);
220 /* performant mode helper functions */
221 static void calc_bucket_map(int *bucket, int num_buckets, int nsgs,
223 static void cciss_put_controller_into_performant_mode(ctlr_info_t *h);
225 #ifdef CONFIG_PROC_FS
226 static void cciss_procinit(int i);
228 static void cciss_procinit(int i)
231 #endif /* CONFIG_PROC_FS */
234 static int cciss_compat_ioctl(struct block_device *, fmode_t,
235 unsigned, unsigned long);
238 static const struct block_device_operations cciss_fops = {
239 .owner = THIS_MODULE,
240 .open = cciss_unlocked_open,
241 .release = cciss_release,
243 .getgeo = cciss_getgeo,
245 .compat_ioctl = cciss_compat_ioctl,
247 .revalidate_disk = cciss_revalidate,
250 /* set_performant_mode: Modify the tag for cciss performant
251 * set bit 0 for pull model, bits 3-1 for block fetch
254 static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c)
256 if (likely(h->transMethod == CFGTBL_Trans_Performant))
257 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
261 * Enqueuing and dequeuing functions for cmdlists.
263 static inline void addQ(struct hlist_head *list, CommandList_struct *c)
265 hlist_add_head(&c->list, list);
268 static inline void removeQ(CommandList_struct *c)
271 * After kexec/dump some commands might still
272 * be in flight, which the firmware will try
273 * to complete. Resetting the firmware doesn't work
274 * with old fw revisions, so we have to mark
275 * them off as 'stale' to prevent the driver from
278 if (WARN_ON(hlist_unhashed(&c->list))) {
279 c->cmd_type = CMD_MSG_STALE;
283 hlist_del_init(&c->list);
286 static void enqueue_cmd_and_start_io(ctlr_info_t *h,
287 CommandList_struct *c)
290 set_performant_mode(h, c);
291 spin_lock_irqsave(&h->lock, flags);
295 spin_unlock_irqrestore(&h->lock, flags);
298 static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list,
305 for (i = 0; i < nr_cmds; i++) {
306 kfree(cmd_sg_list[i]);
307 cmd_sg_list[i] = NULL;
312 static SGDescriptor_struct **cciss_allocate_sg_chain_blocks(
313 ctlr_info_t *h, int chainsize, int nr_cmds)
316 SGDescriptor_struct **cmd_sg_list;
321 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL);
325 /* Build up chain blocks for each command */
326 for (j = 0; j < nr_cmds; j++) {
327 /* Need a block of chainsized s/g elements. */
328 cmd_sg_list[j] = kmalloc((chainsize *
329 sizeof(*cmd_sg_list[j])), GFP_KERNEL);
330 if (!cmd_sg_list[j]) {
331 dev_err(&h->pdev->dev, "Cannot get memory "
332 "for s/g chains.\n");
338 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds);
342 static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c)
344 SGDescriptor_struct *chain_sg;
347 if (c->Header.SGTotal <= h->max_cmd_sgentries)
350 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
351 temp64.val32.lower = chain_sg->Addr.lower;
352 temp64.val32.upper = chain_sg->Addr.upper;
353 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
356 static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c,
357 SGDescriptor_struct *chain_block, int len)
359 SGDescriptor_struct *chain_sg;
362 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
363 chain_sg->Ext = CCISS_SG_CHAIN;
365 temp64.val = pci_map_single(h->pdev, chain_block, len,
367 chain_sg->Addr.lower = temp64.val32.lower;
368 chain_sg->Addr.upper = temp64.val32.upper;
371 #include "cciss_scsi.c" /* For SCSI tape support */
373 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
376 #define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
378 #ifdef CONFIG_PROC_FS
381 * Report information about this controller.
383 #define ENG_GIG 1000000000
384 #define ENG_GIG_FACTOR (ENG_GIG/512)
385 #define ENGAGE_SCSI "engage scsi"
387 static struct proc_dir_entry *proc_cciss;
389 static void cciss_seq_show_header(struct seq_file *seq)
391 ctlr_info_t *h = seq->private;
393 seq_printf(seq, "%s: HP %s Controller\n"
394 "Board ID: 0x%08lx\n"
395 "Firmware Version: %c%c%c%c\n"
397 "Logical drives: %d\n"
398 "Current Q depth: %d\n"
399 "Current # commands on controller: %d\n"
400 "Max Q depth since init: %d\n"
401 "Max # commands on controller since init: %d\n"
402 "Max SG entries since init: %d\n",
405 (unsigned long)h->board_id,
406 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
407 h->firm_ver[3], (unsigned int)h->intr[PERF_MODE_INT],
409 h->Qdepth, h->commands_outstanding,
410 h->maxQsinceinit, h->max_outstanding, h->maxSG);
412 #ifdef CONFIG_CISS_SCSI_TAPE
413 cciss_seq_tape_report(seq, h->ctlr);
414 #endif /* CONFIG_CISS_SCSI_TAPE */
417 static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
419 ctlr_info_t *h = seq->private;
420 unsigned ctlr = h->ctlr;
423 /* prevent displaying bogus info during configuration
424 * or deconfiguration of a logical volume
426 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
427 if (h->busy_configuring) {
428 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
429 return ERR_PTR(-EBUSY);
431 h->busy_configuring = 1;
432 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
435 cciss_seq_show_header(seq);
440 static int cciss_seq_show(struct seq_file *seq, void *v)
442 sector_t vol_sz, vol_sz_frac;
443 ctlr_info_t *h = seq->private;
444 unsigned ctlr = h->ctlr;
446 drive_info_struct *drv = h->drv[*pos];
448 if (*pos > h->highest_lun)
451 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
457 vol_sz = drv->nr_blocks;
458 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
460 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
462 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
463 drv->raid_level = RAID_UNKNOWN;
464 seq_printf(seq, "cciss/c%dd%d:"
465 "\t%4u.%02uGB\tRAID %s\n",
466 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
467 raid_label[drv->raid_level]);
471 static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
473 ctlr_info_t *h = seq->private;
475 if (*pos > h->highest_lun)
482 static void cciss_seq_stop(struct seq_file *seq, void *v)
484 ctlr_info_t *h = seq->private;
486 /* Only reset h->busy_configuring if we succeeded in setting
487 * it during cciss_seq_start. */
488 if (v == ERR_PTR(-EBUSY))
491 h->busy_configuring = 0;
494 static const struct seq_operations cciss_seq_ops = {
495 .start = cciss_seq_start,
496 .show = cciss_seq_show,
497 .next = cciss_seq_next,
498 .stop = cciss_seq_stop,
501 static int cciss_seq_open(struct inode *inode, struct file *file)
503 int ret = seq_open(file, &cciss_seq_ops);
504 struct seq_file *seq = file->private_data;
507 seq->private = PDE(inode)->data;
513 cciss_proc_write(struct file *file, const char __user *buf,
514 size_t length, loff_t *ppos)
519 #ifndef CONFIG_CISS_SCSI_TAPE
523 if (!buf || length > PAGE_SIZE - 1)
526 buffer = (char *)__get_free_page(GFP_KERNEL);
531 if (copy_from_user(buffer, buf, length))
533 buffer[length] = '\0';
535 #ifdef CONFIG_CISS_SCSI_TAPE
536 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
537 struct seq_file *seq = file->private_data;
538 ctlr_info_t *h = seq->private;
540 err = cciss_engage_scsi(h->ctlr);
544 #endif /* CONFIG_CISS_SCSI_TAPE */
546 /* might be nice to have "disengage" too, but it's not
547 safely possible. (only 1 module use count, lock issues.) */
550 free_page((unsigned long)buffer);
554 static const struct file_operations cciss_proc_fops = {
555 .owner = THIS_MODULE,
556 .open = cciss_seq_open,
559 .release = seq_release,
560 .write = cciss_proc_write,
563 static void __devinit cciss_procinit(int i)
565 struct proc_dir_entry *pde;
567 if (proc_cciss == NULL)
568 proc_cciss = proc_mkdir("driver/cciss", NULL);
571 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
573 &cciss_proc_fops, hba[i]);
575 #endif /* CONFIG_PROC_FS */
577 #define MAX_PRODUCT_NAME_LEN 19
579 #define to_hba(n) container_of(n, struct ctlr_info, dev)
580 #define to_drv(n) container_of(n, drive_info_struct, dev)
582 static ssize_t host_store_rescan(struct device *dev,
583 struct device_attribute *attr,
584 const char *buf, size_t count)
586 struct ctlr_info *h = to_hba(dev);
589 wake_up_process(cciss_scan_thread);
590 wait_for_completion_interruptible(&h->scan_wait);
594 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
596 static ssize_t dev_show_unique_id(struct device *dev,
597 struct device_attribute *attr,
600 drive_info_struct *drv = to_drv(dev);
601 struct ctlr_info *h = to_hba(drv->dev.parent);
606 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
607 if (h->busy_configuring)
610 memcpy(sn, drv->serial_no, sizeof(sn));
611 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
616 return snprintf(buf, 16 * 2 + 2,
617 "%02X%02X%02X%02X%02X%02X%02X%02X"
618 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
619 sn[0], sn[1], sn[2], sn[3],
620 sn[4], sn[5], sn[6], sn[7],
621 sn[8], sn[9], sn[10], sn[11],
622 sn[12], sn[13], sn[14], sn[15]);
624 static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
626 static ssize_t dev_show_vendor(struct device *dev,
627 struct device_attribute *attr,
630 drive_info_struct *drv = to_drv(dev);
631 struct ctlr_info *h = to_hba(drv->dev.parent);
632 char vendor[VENDOR_LEN + 1];
636 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
637 if (h->busy_configuring)
640 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
641 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
646 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
648 static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
650 static ssize_t dev_show_model(struct device *dev,
651 struct device_attribute *attr,
654 drive_info_struct *drv = to_drv(dev);
655 struct ctlr_info *h = to_hba(drv->dev.parent);
656 char model[MODEL_LEN + 1];
660 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
661 if (h->busy_configuring)
664 memcpy(model, drv->model, MODEL_LEN + 1);
665 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
670 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
672 static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
674 static ssize_t dev_show_rev(struct device *dev,
675 struct device_attribute *attr,
678 drive_info_struct *drv = to_drv(dev);
679 struct ctlr_info *h = to_hba(drv->dev.parent);
680 char rev[REV_LEN + 1];
684 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
685 if (h->busy_configuring)
688 memcpy(rev, drv->rev, REV_LEN + 1);
689 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
694 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
696 static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
698 static ssize_t cciss_show_lunid(struct device *dev,
699 struct device_attribute *attr, char *buf)
701 drive_info_struct *drv = to_drv(dev);
702 struct ctlr_info *h = to_hba(drv->dev.parent);
704 unsigned char lunid[8];
706 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
707 if (h->busy_configuring) {
708 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
712 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
715 memcpy(lunid, drv->LunID, sizeof(lunid));
716 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
717 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
718 lunid[0], lunid[1], lunid[2], lunid[3],
719 lunid[4], lunid[5], lunid[6], lunid[7]);
721 static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
723 static ssize_t cciss_show_raid_level(struct device *dev,
724 struct device_attribute *attr, char *buf)
726 drive_info_struct *drv = to_drv(dev);
727 struct ctlr_info *h = to_hba(drv->dev.parent);
731 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
732 if (h->busy_configuring) {
733 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
736 raid = drv->raid_level;
737 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
738 if (raid < 0 || raid > RAID_UNKNOWN)
741 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
744 static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
746 static ssize_t cciss_show_usage_count(struct device *dev,
747 struct device_attribute *attr, char *buf)
749 drive_info_struct *drv = to_drv(dev);
750 struct ctlr_info *h = to_hba(drv->dev.parent);
754 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
755 if (h->busy_configuring) {
756 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
759 count = drv->usage_count;
760 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
761 return snprintf(buf, 20, "%d\n", count);
763 static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
765 static struct attribute *cciss_host_attrs[] = {
766 &dev_attr_rescan.attr,
770 static struct attribute_group cciss_host_attr_group = {
771 .attrs = cciss_host_attrs,
774 static const struct attribute_group *cciss_host_attr_groups[] = {
775 &cciss_host_attr_group,
779 static struct device_type cciss_host_type = {
780 .name = "cciss_host",
781 .groups = cciss_host_attr_groups,
782 .release = cciss_hba_release,
785 static struct attribute *cciss_dev_attrs[] = {
786 &dev_attr_unique_id.attr,
787 &dev_attr_model.attr,
788 &dev_attr_vendor.attr,
790 &dev_attr_lunid.attr,
791 &dev_attr_raid_level.attr,
792 &dev_attr_usage_count.attr,
796 static struct attribute_group cciss_dev_attr_group = {
797 .attrs = cciss_dev_attrs,
800 static const struct attribute_group *cciss_dev_attr_groups[] = {
801 &cciss_dev_attr_group,
805 static struct device_type cciss_dev_type = {
806 .name = "cciss_device",
807 .groups = cciss_dev_attr_groups,
808 .release = cciss_device_release,
811 static struct bus_type cciss_bus_type = {
816 * cciss_hba_release is called when the reference count
817 * of h->dev goes to zero.
819 static void cciss_hba_release(struct device *dev)
822 * nothing to do, but need this to avoid a warning
823 * about not having a release handler from lib/kref.c.
828 * Initialize sysfs entry for each controller. This sets up and registers
829 * the 'cciss#' directory for each individual controller under
830 * /sys/bus/pci/devices/<dev>/.
832 static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
834 device_initialize(&h->dev);
835 h->dev.type = &cciss_host_type;
836 h->dev.bus = &cciss_bus_type;
837 dev_set_name(&h->dev, "%s", h->devname);
838 h->dev.parent = &h->pdev->dev;
840 return device_add(&h->dev);
844 * Remove sysfs entries for an hba.
846 static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
849 put_device(&h->dev); /* final put. */
852 /* cciss_device_release is called when the reference count
853 * of h->drv[x]dev goes to zero.
855 static void cciss_device_release(struct device *dev)
857 drive_info_struct *drv = to_drv(dev);
862 * Initialize sysfs for each logical drive. This sets up and registers
863 * the 'c#d#' directory for each individual logical drive under
864 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
865 * /sys/block/cciss!c#d# to this entry.
867 static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
872 if (h->drv[drv_index]->device_initialized)
875 dev = &h->drv[drv_index]->dev;
876 device_initialize(dev);
877 dev->type = &cciss_dev_type;
878 dev->bus = &cciss_bus_type;
879 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
880 dev->parent = &h->dev;
881 h->drv[drv_index]->device_initialized = 1;
882 return device_add(dev);
886 * Remove sysfs entries for a logical drive.
888 static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
891 struct device *dev = &h->drv[drv_index]->dev;
893 /* special case for c*d0, we only destroy it on controller exit */
894 if (drv_index == 0 && !ctlr_exiting)
898 put_device(dev); /* the "final" put. */
899 h->drv[drv_index] = NULL;
903 * For operations that cannot sleep, a command block is allocated at init,
904 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
905 * which ones are free or in use. For operations that can wait for kmalloc
906 * to possible sleep, this routine can be called with get_from_pool set to 0.
907 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
909 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
911 CommandList_struct *c;
914 dma_addr_t cmd_dma_handle, err_dma_handle;
916 if (!get_from_pool) {
917 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
918 sizeof(CommandList_struct), &cmd_dma_handle);
921 memset(c, 0, sizeof(CommandList_struct));
925 c->err_info = (ErrorInfo_struct *)
926 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
929 if (c->err_info == NULL) {
930 pci_free_consistent(h->pdev,
931 sizeof(CommandList_struct), c, cmd_dma_handle);
934 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
935 } else { /* get it out of the controllers pool */
938 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
941 } while (test_and_set_bit
942 (i & (BITS_PER_LONG - 1),
943 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
945 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
948 memset(c, 0, sizeof(CommandList_struct));
949 cmd_dma_handle = h->cmd_pool_dhandle
950 + i * sizeof(CommandList_struct);
951 c->err_info = h->errinfo_pool + i;
952 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
953 err_dma_handle = h->errinfo_pool_dhandle
954 + i * sizeof(ErrorInfo_struct);
960 INIT_HLIST_NODE(&c->list);
961 c->busaddr = (__u32) cmd_dma_handle;
962 temp64.val = (__u64) err_dma_handle;
963 c->ErrDesc.Addr.lower = temp64.val32.lower;
964 c->ErrDesc.Addr.upper = temp64.val32.upper;
965 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
972 * Frees a command block that was previously allocated with cmd_alloc().
974 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
979 if (!got_from_pool) {
980 temp64.val32.lower = c->ErrDesc.Addr.lower;
981 temp64.val32.upper = c->ErrDesc.Addr.upper;
982 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
983 c->err_info, (dma_addr_t) temp64.val);
984 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
985 c, (dma_addr_t) c->busaddr);
988 clear_bit(i & (BITS_PER_LONG - 1),
989 h->cmd_pool_bits + (i / BITS_PER_LONG));
994 static inline ctlr_info_t *get_host(struct gendisk *disk)
996 return disk->queue->queuedata;
999 static inline drive_info_struct *get_drv(struct gendisk *disk)
1001 return disk->private_data;
1005 * Open. Make sure the device is really there.
1007 static int cciss_open(struct block_device *bdev, fmode_t mode)
1009 ctlr_info_t *host = get_host(bdev->bd_disk);
1010 drive_info_struct *drv = get_drv(bdev->bd_disk);
1013 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
1014 #endif /* CCISS_DEBUG */
1016 if (drv->busy_configuring)
1019 * Root is allowed to open raw volume zero even if it's not configured
1020 * so array config can still work. Root is also allowed to open any
1021 * volume that has a LUN ID, so it can issue IOCTL to reread the
1022 * disk information. I don't think I really like this
1023 * but I'm already using way to many device nodes to claim another one
1024 * for "raw controller".
1026 if (drv->heads == 0) {
1027 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1028 /* if not node 0 make sure it is a partition = 0 */
1029 if (MINOR(bdev->bd_dev) & 0x0f) {
1031 /* if it is, make sure we have a LUN ID */
1032 } else if (memcmp(drv->LunID, CTLR_LUNID,
1033 sizeof(drv->LunID))) {
1037 if (!capable(CAP_SYS_ADMIN))
1041 host->usage_count++;
1045 static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode)
1050 ret = cciss_open(bdev, mode);
1057 * Close. Sync first.
1059 static int cciss_release(struct gendisk *disk, fmode_t mode)
1062 drive_info_struct *drv;
1065 host = get_host(disk);
1066 drv = get_drv(disk);
1069 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
1070 #endif /* CCISS_DEBUG */
1073 host->usage_count--;
1078 static int do_ioctl(struct block_device *bdev, fmode_t mode,
1079 unsigned cmd, unsigned long arg)
1083 ret = cciss_ioctl(bdev, mode, cmd, arg);
1088 #ifdef CONFIG_COMPAT
1090 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1091 unsigned cmd, unsigned long arg);
1092 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1093 unsigned cmd, unsigned long arg);
1095 static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1096 unsigned cmd, unsigned long arg)
1099 case CCISS_GETPCIINFO:
1100 case CCISS_GETINTINFO:
1101 case CCISS_SETINTINFO:
1102 case CCISS_GETNODENAME:
1103 case CCISS_SETNODENAME:
1104 case CCISS_GETHEARTBEAT:
1105 case CCISS_GETBUSTYPES:
1106 case CCISS_GETFIRMVER:
1107 case CCISS_GETDRIVVER:
1108 case CCISS_REVALIDVOLS:
1109 case CCISS_DEREGDISK:
1110 case CCISS_REGNEWDISK:
1112 case CCISS_RESCANDISK:
1113 case CCISS_GETLUNINFO:
1114 return do_ioctl(bdev, mode, cmd, arg);
1116 case CCISS_PASSTHRU32:
1117 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1118 case CCISS_BIG_PASSTHRU32:
1119 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1122 return -ENOIOCTLCMD;
1126 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1127 unsigned cmd, unsigned long arg)
1129 IOCTL32_Command_struct __user *arg32 =
1130 (IOCTL32_Command_struct __user *) arg;
1131 IOCTL_Command_struct arg64;
1132 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1138 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1139 sizeof(arg64.LUN_info));
1141 copy_from_user(&arg64.Request, &arg32->Request,
1142 sizeof(arg64.Request));
1144 copy_from_user(&arg64.error_info, &arg32->error_info,
1145 sizeof(arg64.error_info));
1146 err |= get_user(arg64.buf_size, &arg32->buf_size);
1147 err |= get_user(cp, &arg32->buf);
1148 arg64.buf = compat_ptr(cp);
1149 err |= copy_to_user(p, &arg64, sizeof(arg64));
1154 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1158 copy_in_user(&arg32->error_info, &p->error_info,
1159 sizeof(arg32->error_info));
1165 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1166 unsigned cmd, unsigned long arg)
1168 BIG_IOCTL32_Command_struct __user *arg32 =
1169 (BIG_IOCTL32_Command_struct __user *) arg;
1170 BIG_IOCTL_Command_struct arg64;
1171 BIG_IOCTL_Command_struct __user *p =
1172 compat_alloc_user_space(sizeof(arg64));
1178 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1179 sizeof(arg64.LUN_info));
1181 copy_from_user(&arg64.Request, &arg32->Request,
1182 sizeof(arg64.Request));
1184 copy_from_user(&arg64.error_info, &arg32->error_info,
1185 sizeof(arg64.error_info));
1186 err |= get_user(arg64.buf_size, &arg32->buf_size);
1187 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1188 err |= get_user(cp, &arg32->buf);
1189 arg64.buf = compat_ptr(cp);
1190 err |= copy_to_user(p, &arg64, sizeof(arg64));
1195 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1199 copy_in_user(&arg32->error_info, &p->error_info,
1200 sizeof(arg32->error_info));
1207 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1209 drive_info_struct *drv = get_drv(bdev->bd_disk);
1211 if (!drv->cylinders)
1214 geo->heads = drv->heads;
1215 geo->sectors = drv->sectors;
1216 geo->cylinders = drv->cylinders;
1220 static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1222 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1223 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1224 (void)check_for_unit_attention(host, c);
1229 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
1230 unsigned int cmd, unsigned long arg)
1232 struct gendisk *disk = bdev->bd_disk;
1233 ctlr_info_t *host = get_host(disk);
1234 drive_info_struct *drv = get_drv(disk);
1235 int ctlr = host->ctlr;
1236 void __user *argp = (void __user *)arg;
1239 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
1240 #endif /* CCISS_DEBUG */
1243 case CCISS_GETPCIINFO:
1245 cciss_pci_info_struct pciinfo;
1249 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1250 pciinfo.bus = host->pdev->bus->number;
1251 pciinfo.dev_fn = host->pdev->devfn;
1252 pciinfo.board_id = host->board_id;
1254 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1258 case CCISS_GETINTINFO:
1260 cciss_coalint_struct intinfo;
1264 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1266 readl(&host->cfgtable->HostWrite.CoalIntCount);
1268 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1272 case CCISS_SETINTINFO:
1274 cciss_coalint_struct intinfo;
1275 unsigned long flags;
1280 if (!capable(CAP_SYS_ADMIN))
1283 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1285 if ((intinfo.delay == 0) && (intinfo.count == 0))
1287 // printk("cciss_ioctl: delay and count cannot be 0\n");
1290 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1291 /* Update the field, and then ring the doorbell */
1292 writel(intinfo.delay,
1293 &(host->cfgtable->HostWrite.CoalIntDelay));
1294 writel(intinfo.count,
1295 &(host->cfgtable->HostWrite.CoalIntCount));
1296 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1298 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1299 if (!(readl(host->vaddr + SA5_DOORBELL)
1300 & CFGTBL_ChangeReq))
1302 /* delay and try again */
1305 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1306 if (i >= MAX_IOCTL_CONFIG_WAIT)
1310 case CCISS_GETNODENAME:
1312 NodeName_type NodeName;
1317 for (i = 0; i < 16; i++)
1319 readb(&host->cfgtable->ServerName[i]);
1320 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1324 case CCISS_SETNODENAME:
1326 NodeName_type NodeName;
1327 unsigned long flags;
1332 if (!capable(CAP_SYS_ADMIN))
1336 (NodeName, argp, sizeof(NodeName_type)))
1339 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1341 /* Update the field, and then ring the doorbell */
1342 for (i = 0; i < 16; i++)
1344 &host->cfgtable->ServerName[i]);
1346 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1348 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1349 if (!(readl(host->vaddr + SA5_DOORBELL)
1350 & CFGTBL_ChangeReq))
1352 /* delay and try again */
1355 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1356 if (i >= MAX_IOCTL_CONFIG_WAIT)
1361 case CCISS_GETHEARTBEAT:
1363 Heartbeat_type heartbeat;
1367 heartbeat = readl(&host->cfgtable->HeartBeat);
1369 (argp, &heartbeat, sizeof(Heartbeat_type)))
1373 case CCISS_GETBUSTYPES:
1375 BusTypes_type BusTypes;
1379 BusTypes = readl(&host->cfgtable->BusTypes);
1381 (argp, &BusTypes, sizeof(BusTypes_type)))
1385 case CCISS_GETFIRMVER:
1387 FirmwareVer_type firmware;
1391 memcpy(firmware, host->firm_ver, 4);
1394 (argp, firmware, sizeof(FirmwareVer_type)))
1398 case CCISS_GETDRIVVER:
1400 DriverVer_type DriverVer = DRIVER_VERSION;
1406 (argp, &DriverVer, sizeof(DriverVer_type)))
1411 case CCISS_DEREGDISK:
1413 case CCISS_REVALIDVOLS:
1414 return rebuild_lun_table(host, 0, 1);
1416 case CCISS_GETLUNINFO:{
1417 LogvolInfo_struct luninfo;
1419 memcpy(&luninfo.LunID, drv->LunID,
1420 sizeof(luninfo.LunID));
1421 luninfo.num_opens = drv->usage_count;
1422 luninfo.num_parts = 0;
1423 if (copy_to_user(argp, &luninfo,
1424 sizeof(LogvolInfo_struct)))
1428 case CCISS_PASSTHRU:
1430 IOCTL_Command_struct iocommand;
1431 CommandList_struct *c;
1434 DECLARE_COMPLETION_ONSTACK(wait);
1439 if (!capable(CAP_SYS_RAWIO))
1443 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1445 if ((iocommand.buf_size < 1) &&
1446 (iocommand.Request.Type.Direction != XFER_NONE)) {
1449 #if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1450 /* Check kmalloc limits */
1451 if (iocommand.buf_size > 128000)
1454 if (iocommand.buf_size > 0) {
1455 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1459 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1460 /* Copy the data into the buffer we created */
1462 (buff, iocommand.buf, iocommand.buf_size)) {
1467 memset(buff, 0, iocommand.buf_size);
1469 if ((c = cmd_alloc(host, 0)) == NULL) {
1473 /* Fill in the command type */
1474 c->cmd_type = CMD_IOCTL_PEND;
1475 /* Fill in Command Header */
1476 c->Header.ReplyQueue = 0; /* unused in simple mode */
1477 if (iocommand.buf_size > 0) /* buffer to fill */
1479 c->Header.SGList = 1;
1480 c->Header.SGTotal = 1;
1481 } else /* no buffers to fill */
1483 c->Header.SGList = 0;
1484 c->Header.SGTotal = 0;
1486 c->Header.LUN = iocommand.LUN_info;
1487 /* use the kernel address the cmd block for tag */
1488 c->Header.Tag.lower = c->busaddr;
1490 /* Fill in Request block */
1491 c->Request = iocommand.Request;
1493 /* Fill in the scatter gather information */
1494 if (iocommand.buf_size > 0) {
1495 temp64.val = pci_map_single(host->pdev, buff,
1497 PCI_DMA_BIDIRECTIONAL);
1498 c->SG[0].Addr.lower = temp64.val32.lower;
1499 c->SG[0].Addr.upper = temp64.val32.upper;
1500 c->SG[0].Len = iocommand.buf_size;
1501 c->SG[0].Ext = 0; /* we are not chaining */
1505 enqueue_cmd_and_start_io(host, c);
1506 wait_for_completion(&wait);
1508 /* unlock the buffers from DMA */
1509 temp64.val32.lower = c->SG[0].Addr.lower;
1510 temp64.val32.upper = c->SG[0].Addr.upper;
1511 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1513 PCI_DMA_BIDIRECTIONAL);
1515 check_ioctl_unit_attention(host, c);
1517 /* Copy the error information out */
1518 iocommand.error_info = *(c->err_info);
1520 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1522 cmd_free(host, c, 0);
1526 if (iocommand.Request.Type.Direction == XFER_READ) {
1527 /* Copy the data out of the buffer we created */
1529 (iocommand.buf, buff, iocommand.buf_size)) {
1531 cmd_free(host, c, 0);
1536 cmd_free(host, c, 0);
1539 case CCISS_BIG_PASSTHRU:{
1540 BIG_IOCTL_Command_struct *ioc;
1541 CommandList_struct *c;
1542 unsigned char **buff = NULL;
1543 int *buff_size = NULL;
1548 DECLARE_COMPLETION_ONSTACK(wait);
1551 BYTE __user *data_ptr;
1555 if (!capable(CAP_SYS_RAWIO))
1557 ioc = (BIG_IOCTL_Command_struct *)
1558 kmalloc(sizeof(*ioc), GFP_KERNEL);
1563 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1567 if ((ioc->buf_size < 1) &&
1568 (ioc->Request.Type.Direction != XFER_NONE)) {
1572 /* Check kmalloc limits using all SGs */
1573 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1577 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1582 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1587 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
1593 left = ioc->buf_size;
1594 data_ptr = ioc->buf;
1597 ioc->malloc_size) ? ioc->
1599 buff_size[sg_used] = sz;
1600 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1601 if (buff[sg_used] == NULL) {
1605 if (ioc->Request.Type.Direction == XFER_WRITE) {
1607 (buff[sg_used], data_ptr, sz)) {
1612 memset(buff[sg_used], 0, sz);
1618 if ((c = cmd_alloc(host, 0)) == NULL) {
1622 c->cmd_type = CMD_IOCTL_PEND;
1623 c->Header.ReplyQueue = 0;
1625 if (ioc->buf_size > 0) {
1626 c->Header.SGList = sg_used;
1627 c->Header.SGTotal = sg_used;
1629 c->Header.SGList = 0;
1630 c->Header.SGTotal = 0;
1632 c->Header.LUN = ioc->LUN_info;
1633 c->Header.Tag.lower = c->busaddr;
1635 c->Request = ioc->Request;
1636 if (ioc->buf_size > 0) {
1637 for (i = 0; i < sg_used; i++) {
1639 pci_map_single(host->pdev, buff[i],
1641 PCI_DMA_BIDIRECTIONAL);
1642 c->SG[i].Addr.lower =
1644 c->SG[i].Addr.upper =
1646 c->SG[i].Len = buff_size[i];
1647 c->SG[i].Ext = 0; /* we are not chaining */
1651 enqueue_cmd_and_start_io(host, c);
1652 wait_for_completion(&wait);
1653 /* unlock the buffers from DMA */
1654 for (i = 0; i < sg_used; i++) {
1655 temp64.val32.lower = c->SG[i].Addr.lower;
1656 temp64.val32.upper = c->SG[i].Addr.upper;
1657 pci_unmap_single(host->pdev,
1658 (dma_addr_t) temp64.val, buff_size[i],
1659 PCI_DMA_BIDIRECTIONAL);
1661 check_ioctl_unit_attention(host, c);
1662 /* Copy the error information out */
1663 ioc->error_info = *(c->err_info);
1664 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1665 cmd_free(host, c, 0);
1669 if (ioc->Request.Type.Direction == XFER_READ) {
1670 /* Copy the data out of the buffer we created */
1671 BYTE __user *ptr = ioc->buf;
1672 for (i = 0; i < sg_used; i++) {
1674 (ptr, buff[i], buff_size[i])) {
1675 cmd_free(host, c, 0);
1679 ptr += buff_size[i];
1682 cmd_free(host, c, 0);
1686 for (i = 0; i < sg_used; i++)
1695 /* scsi_cmd_ioctl handles these, below, though some are not */
1696 /* very meaningful for cciss. SG_IO is the main one people want. */
1698 case SG_GET_VERSION_NUM:
1699 case SG_SET_TIMEOUT:
1700 case SG_GET_TIMEOUT:
1701 case SG_GET_RESERVED_SIZE:
1702 case SG_SET_RESERVED_SIZE:
1703 case SG_EMULATED_HOST:
1705 case SCSI_IOCTL_SEND_COMMAND:
1706 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
1708 /* scsi_cmd_ioctl would normally handle these, below, but */
1709 /* they aren't a good fit for cciss, as CD-ROMs are */
1710 /* not supported, and we don't have any bus/target/lun */
1711 /* which we present to the kernel. */
1713 case CDROM_SEND_PACKET:
1714 case CDROMCLOSETRAY:
1716 case SCSI_IOCTL_GET_IDLUN:
1717 case SCSI_IOCTL_GET_BUS_NUMBER:
1723 static void cciss_check_queues(ctlr_info_t *h)
1725 int start_queue = h->next_to_run;
1728 /* check to see if we have maxed out the number of commands that can
1729 * be placed on the queue. If so then exit. We do this check here
1730 * in case the interrupt we serviced was from an ioctl and did not
1731 * free any new commands.
1733 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
1736 /* We have room on the queue for more commands. Now we need to queue
1737 * them up. We will also keep track of the next queue to run so
1738 * that every queue gets a chance to be started first.
1740 for (i = 0; i < h->highest_lun + 1; i++) {
1741 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1742 /* make sure the disk has been added and the drive is real
1743 * because this can be called from the middle of init_one.
1745 if (!h->drv[curr_queue])
1747 if (!(h->drv[curr_queue]->queue) ||
1748 !(h->drv[curr_queue]->heads))
1750 blk_start_queue(h->gendisk[curr_queue]->queue);
1752 /* check to see if we have maxed out the number of commands
1753 * that can be placed on the queue.
1755 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
1756 if (curr_queue == start_queue) {
1758 (start_queue + 1) % (h->highest_lun + 1);
1761 h->next_to_run = curr_queue;
1768 static void cciss_softirq_done(struct request *rq)
1770 CommandList_struct *cmd = rq->completion_data;
1771 ctlr_info_t *h = hba[cmd->ctlr];
1772 SGDescriptor_struct *curr_sg = cmd->SG;
1774 unsigned long flags;
1778 if (cmd->Request.Type.Direction == XFER_READ)
1779 ddir = PCI_DMA_FROMDEVICE;
1781 ddir = PCI_DMA_TODEVICE;
1783 /* command did not need to be retried */
1784 /* unmap the DMA mapping for all the scatter gather elements */
1785 for (i = 0; i < cmd->Header.SGList; i++) {
1786 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
1787 cciss_unmap_sg_chain_block(h, cmd);
1788 /* Point to the next block */
1789 curr_sg = h->cmd_sg_list[cmd->cmdindex];
1792 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1793 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1794 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1800 printk("Done with %p\n", rq);
1801 #endif /* CCISS_DEBUG */
1803 /* set the residual count for pc requests */
1804 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1805 rq->resid_len = cmd->err_info->ResidualCnt;
1807 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
1809 spin_lock_irqsave(&h->lock, flags);
1810 cmd_free(h, cmd, 1);
1811 cciss_check_queues(h);
1812 spin_unlock_irqrestore(&h->lock, flags);
1815 static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1816 unsigned char scsi3addr[], uint32_t log_unit)
1818 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1819 sizeof(h->drv[log_unit]->LunID));
1822 /* This function gets the SCSI vendor, model, and revision of a logical drive
1823 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1824 * they cannot be read.
1826 static void cciss_get_device_descr(int ctlr, int logvol,
1827 char *vendor, char *model, char *rev)
1830 InquiryData_struct *inq_buf;
1831 unsigned char scsi3addr[8];
1837 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1841 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1842 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1843 scsi3addr, TYPE_CMD);
1845 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1846 vendor[VENDOR_LEN] = '\0';
1847 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1848 model[MODEL_LEN] = '\0';
1849 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1850 rev[REV_LEN] = '\0';
1857 /* This function gets the serial number of a logical drive via
1858 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1859 * number cannot be had, for whatever reason, 16 bytes of 0xff
1860 * are returned instead.
1862 static void cciss_get_serial_no(int ctlr, int logvol,
1863 unsigned char *serial_no, int buflen)
1865 #define PAGE_83_INQ_BYTES 64
1868 unsigned char scsi3addr[8];
1872 memset(serial_no, 0xff, buflen);
1873 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1876 memset(serial_no, 0, buflen);
1877 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1878 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1879 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
1881 memcpy(serial_no, &buf[8], buflen);
1887 * cciss_add_disk sets up the block device queue for a logical drive
1889 static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1892 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1894 goto init_queue_failure;
1895 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1896 disk->major = h->major;
1897 disk->first_minor = drv_index << NWD_SHIFT;
1898 disk->fops = &cciss_fops;
1899 if (cciss_create_ld_sysfs_entry(h, drv_index))
1901 disk->private_data = h->drv[drv_index];
1902 disk->driverfs_dev = &h->drv[drv_index]->dev;
1904 /* Set up queue information */
1905 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1907 /* This is a hardware imposed limit. */
1908 blk_queue_max_segments(disk->queue, h->maxsgentries);
1910 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
1912 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1914 disk->queue->queuedata = h;
1916 blk_queue_logical_block_size(disk->queue,
1917 h->drv[drv_index]->block_size);
1919 /* Make sure all queue data is written out before */
1920 /* setting h->drv[drv_index]->queue, as setting this */
1921 /* allows the interrupt handler to start the queue */
1923 h->drv[drv_index]->queue = disk->queue;
1928 blk_cleanup_queue(disk->queue);
1934 /* This function will check the usage_count of the drive to be updated/added.
1935 * If the usage_count is zero and it is a heretofore unknown drive, or,
1936 * the drive's capacity, geometry, or serial number has changed,
1937 * then the drive information will be updated and the disk will be
1938 * re-registered with the kernel. If these conditions don't hold,
1939 * then it will be left alone for the next reboot. The exception to this
1940 * is disk 0 which will always be left registered with the kernel since it
1941 * is also the controller node. Any changes to disk 0 will show up on
1944 static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1947 ctlr_info_t *h = hba[ctlr];
1948 struct gendisk *disk;
1949 InquiryData_struct *inq_buff = NULL;
1950 unsigned int block_size;
1951 sector_t total_size;
1952 unsigned long flags = 0;
1954 drive_info_struct *drvinfo;
1956 /* Get information about the disk and modify the driver structure */
1957 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1958 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
1959 if (inq_buff == NULL || drvinfo == NULL)
1962 /* testing to see if 16-byte CDBs are already being used */
1963 if (h->cciss_read == CCISS_READ_16) {
1964 cciss_read_capacity_16(h->ctlr, drv_index,
1965 &total_size, &block_size);
1968 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
1969 /* if read_capacity returns all F's this volume is >2TB */
1970 /* in size so we switch to 16-byte CDB's for all */
1971 /* read/write ops */
1972 if (total_size == 0xFFFFFFFFULL) {
1973 cciss_read_capacity_16(ctlr, drv_index,
1974 &total_size, &block_size);
1975 h->cciss_read = CCISS_READ_16;
1976 h->cciss_write = CCISS_WRITE_16;
1978 h->cciss_read = CCISS_READ_10;
1979 h->cciss_write = CCISS_WRITE_10;
1983 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
1985 drvinfo->block_size = block_size;
1986 drvinfo->nr_blocks = total_size + 1;
1988 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
1989 drvinfo->model, drvinfo->rev);
1990 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
1991 sizeof(drvinfo->serial_no));
1992 /* Save the lunid in case we deregister the disk, below. */
1993 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1994 sizeof(drvinfo->LunID));
1996 /* Is it the same disk we already know, and nothing's changed? */
1997 if (h->drv[drv_index]->raid_level != -1 &&
1998 ((memcmp(drvinfo->serial_no,
1999 h->drv[drv_index]->serial_no, 16) == 0) &&
2000 drvinfo->block_size == h->drv[drv_index]->block_size &&
2001 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
2002 drvinfo->heads == h->drv[drv_index]->heads &&
2003 drvinfo->sectors == h->drv[drv_index]->sectors &&
2004 drvinfo->cylinders == h->drv[drv_index]->cylinders))
2005 /* The disk is unchanged, nothing to update */
2008 /* If we get here it's not the same disk, or something's changed,
2009 * so we need to * deregister it, and re-register it, if it's not
2011 * If the disk already exists then deregister it before proceeding
2012 * (unless it's the first disk (for the controller node).
2014 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
2015 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
2016 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2017 h->drv[drv_index]->busy_configuring = 1;
2018 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2020 /* deregister_disk sets h->drv[drv_index]->queue = NULL
2021 * which keeps the interrupt handler from starting
2024 ret = deregister_disk(h, drv_index, 0, via_ioctl);
2027 /* If the disk is in use return */
2031 /* Save the new information from cciss_geometry_inquiry
2032 * and serial number inquiry. If the disk was deregistered
2033 * above, then h->drv[drv_index] will be NULL.
2035 if (h->drv[drv_index] == NULL) {
2036 drvinfo->device_initialized = 0;
2037 h->drv[drv_index] = drvinfo;
2038 drvinfo = NULL; /* so it won't be freed below. */
2040 /* special case for cxd0 */
2041 h->drv[drv_index]->block_size = drvinfo->block_size;
2042 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2043 h->drv[drv_index]->heads = drvinfo->heads;
2044 h->drv[drv_index]->sectors = drvinfo->sectors;
2045 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2046 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2047 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2048 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2050 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2051 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2055 disk = h->gendisk[drv_index];
2056 set_capacity(disk, h->drv[drv_index]->nr_blocks);
2058 /* If it's not disk 0 (drv_index != 0)
2059 * or if it was disk 0, but there was previously
2060 * no actual corresponding configured logical drive
2061 * (raid_leve == -1) then we want to update the
2062 * logical drive's information.
2064 if (drv_index || first_time) {
2065 if (cciss_add_disk(h, disk, drv_index) != 0) {
2066 cciss_free_gendisk(h, drv_index);
2067 cciss_free_drive_info(h, drv_index);
2068 printk(KERN_WARNING "cciss:%d could not update "
2069 "disk %d\n", h->ctlr, drv_index);
2079 printk(KERN_ERR "cciss: out of memory\n");
2083 /* This function will find the first index of the controllers drive array
2084 * that has a null drv pointer and allocate the drive info struct and
2085 * will return that index This is where new drives will be added.
2086 * If the index to be returned is greater than the highest_lun index for
2087 * the controller then highest_lun is set * to this new index.
2088 * If there are no available indexes or if tha allocation fails, then -1
2089 * is returned. * "controller_node" is used to know if this is a real
2090 * logical drive, or just the controller node, which determines if this
2091 * counts towards highest_lun.
2093 static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
2096 drive_info_struct *drv;
2098 /* Search for an empty slot for our drive info */
2099 for (i = 0; i < CISS_MAX_LUN; i++) {
2101 /* if not cxd0 case, and it's occupied, skip it. */
2102 if (h->drv[i] && i != 0)
2105 * If it's cxd0 case, and drv is alloc'ed already, and a
2106 * disk is configured there, skip it.
2108 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2112 * We've found an empty slot. Update highest_lun
2113 * provided this isn't just the fake cxd0 controller node.
2115 if (i > h->highest_lun && !controller_node)
2118 /* If adding a real disk at cxd0, and it's already alloc'ed */
2119 if (i == 0 && h->drv[i] != NULL)
2123 * Found an empty slot, not already alloc'ed. Allocate it.
2124 * Mark it with raid_level == -1, so we know it's new later on.
2126 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2129 drv->raid_level = -1; /* so we know it's new */
2136 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2138 kfree(h->drv[drv_index]);
2139 h->drv[drv_index] = NULL;
2142 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2144 put_disk(h->gendisk[drv_index]);
2145 h->gendisk[drv_index] = NULL;
2148 /* cciss_add_gendisk finds a free hba[]->drv structure
2149 * and allocates a gendisk if needed, and sets the lunid
2150 * in the drvinfo structure. It returns the index into
2151 * the ->drv[] array, or -1 if none are free.
2152 * is_controller_node indicates whether highest_lun should
2153 * count this disk, or if it's only being added to provide
2154 * a means to talk to the controller in case no logical
2155 * drives have yet been configured.
2157 static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2158 int controller_node)
2162 drv_index = cciss_alloc_drive_info(h, controller_node);
2163 if (drv_index == -1)
2166 /*Check if the gendisk needs to be allocated */
2167 if (!h->gendisk[drv_index]) {
2168 h->gendisk[drv_index] =
2169 alloc_disk(1 << NWD_SHIFT);
2170 if (!h->gendisk[drv_index]) {
2171 printk(KERN_ERR "cciss%d: could not "
2172 "allocate a new disk %d\n",
2173 h->ctlr, drv_index);
2174 goto err_free_drive_info;
2177 memcpy(h->drv[drv_index]->LunID, lunid,
2178 sizeof(h->drv[drv_index]->LunID));
2179 if (cciss_create_ld_sysfs_entry(h, drv_index))
2181 /* Don't need to mark this busy because nobody */
2182 /* else knows about this disk yet to contend */
2183 /* for access to it. */
2184 h->drv[drv_index]->busy_configuring = 0;
2189 cciss_free_gendisk(h, drv_index);
2190 err_free_drive_info:
2191 cciss_free_drive_info(h, drv_index);
2195 /* This is for the special case of a controller which
2196 * has no logical drives. In this case, we still need
2197 * to register a disk so the controller can be accessed
2198 * by the Array Config Utility.
2200 static void cciss_add_controller_node(ctlr_info_t *h)
2202 struct gendisk *disk;
2205 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2208 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
2209 if (drv_index == -1)
2211 h->drv[drv_index]->block_size = 512;
2212 h->drv[drv_index]->nr_blocks = 0;
2213 h->drv[drv_index]->heads = 0;
2214 h->drv[drv_index]->sectors = 0;
2215 h->drv[drv_index]->cylinders = 0;
2216 h->drv[drv_index]->raid_level = -1;
2217 memset(h->drv[drv_index]->serial_no, 0, 16);
2218 disk = h->gendisk[drv_index];
2219 if (cciss_add_disk(h, disk, drv_index) == 0)
2221 cciss_free_gendisk(h, drv_index);
2222 cciss_free_drive_info(h, drv_index);
2224 printk(KERN_WARNING "cciss%d: could not "
2225 "add disk 0.\n", h->ctlr);
2229 /* This function will add and remove logical drives from the Logical
2230 * drive array of the controller and maintain persistency of ordering
2231 * so that mount points are preserved until the next reboot. This allows
2232 * for the removal of logical drives in the middle of the drive array
2233 * without a re-ordering of those drives.
2235 * h = The controller to perform the operations on
2237 static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2242 ReportLunData_struct *ld_buff = NULL;
2248 unsigned char lunid[8] = CTLR_LUNID;
2249 unsigned long flags;
2251 if (!capable(CAP_SYS_RAWIO))
2254 /* Set busy_configuring flag for this operation */
2255 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2256 if (h->busy_configuring) {
2257 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2260 h->busy_configuring = 1;
2261 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2263 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2264 if (ld_buff == NULL)
2267 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
2268 sizeof(ReportLunData_struct),
2269 0, CTLR_LUNID, TYPE_CMD);
2271 if (return_code == IO_OK)
2272 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2273 else { /* reading number of logical volumes failed */
2274 printk(KERN_WARNING "cciss: report logical volume"
2275 " command failed\n");
2280 num_luns = listlength / 8; /* 8 bytes per entry */
2281 if (num_luns > CISS_MAX_LUN) {
2282 num_luns = CISS_MAX_LUN;
2283 printk(KERN_WARNING "cciss: more luns configured"
2284 " on controller than can be handled by"
2289 cciss_add_controller_node(h);
2291 /* Compare controller drive array to driver's drive array
2292 * to see if any drives are missing on the controller due
2293 * to action of Array Config Utility (user deletes drive)
2294 * and deregister logical drives which have disappeared.
2296 for (i = 0; i <= h->highest_lun; i++) {
2300 /* skip holes in the array from already deleted drives */
2301 if (h->drv[i] == NULL)
2304 for (j = 0; j < num_luns; j++) {
2305 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2306 if (memcmp(h->drv[i]->LunID, lunid,
2307 sizeof(lunid)) == 0) {
2313 /* Deregister it from the OS, it's gone. */
2314 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2315 h->drv[i]->busy_configuring = 1;
2316 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2317 return_code = deregister_disk(h, i, 1, via_ioctl);
2318 if (h->drv[i] != NULL)
2319 h->drv[i]->busy_configuring = 0;
2323 /* Compare controller drive array to driver's drive array.
2324 * Check for updates in the drive information and any new drives
2325 * on the controller due to ACU adding logical drives, or changing
2326 * a logical drive's size, etc. Reregister any new/changed drives
2328 for (i = 0; i < num_luns; i++) {
2333 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
2334 /* Find if the LUN is already in the drive array
2335 * of the driver. If so then update its info
2336 * if not in use. If it does not exist then find
2337 * the first free index and add it.
2339 for (j = 0; j <= h->highest_lun; j++) {
2340 if (h->drv[j] != NULL &&
2341 memcmp(h->drv[j]->LunID, lunid,
2342 sizeof(h->drv[j]->LunID)) == 0) {
2349 /* check if the drive was found already in the array */
2351 drv_index = cciss_add_gendisk(h, lunid, 0);
2352 if (drv_index == -1)
2355 cciss_update_drive_info(ctlr, drv_index, first_time,
2361 h->busy_configuring = 0;
2362 /* We return -1 here to tell the ACU that we have registered/updated
2363 * all of the drives that we can and to keep it from calling us
2368 printk(KERN_ERR "cciss: out of memory\n");
2369 h->busy_configuring = 0;
2373 static void cciss_clear_drive_info(drive_info_struct *drive_info)
2375 /* zero out the disk size info */
2376 drive_info->nr_blocks = 0;
2377 drive_info->block_size = 0;
2378 drive_info->heads = 0;
2379 drive_info->sectors = 0;
2380 drive_info->cylinders = 0;
2381 drive_info->raid_level = -1;
2382 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2383 memset(drive_info->model, 0, sizeof(drive_info->model));
2384 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2385 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2387 * don't clear the LUNID though, we need to remember which
2392 /* This function will deregister the disk and it's queue from the
2393 * kernel. It must be called with the controller lock held and the
2394 * drv structures busy_configuring flag set. It's parameters are:
2396 * disk = This is the disk to be deregistered
2397 * drv = This is the drive_info_struct associated with the disk to be
2398 * deregistered. It contains information about the disk used
2400 * clear_all = This flag determines whether or not the disk information
2401 * is going to be completely cleared out and the highest_lun
2402 * reset. Sometimes we want to clear out information about
2403 * the disk in preparation for re-adding it. In this case
2404 * the highest_lun should be left unchanged and the LunID
2405 * should not be cleared.
2407 * This indicates whether we've reached this path via ioctl.
2408 * This affects the maximum usage count allowed for c0d0 to be messed with.
2409 * If this path is reached via ioctl(), then the max_usage_count will
2410 * be 1, as the process calling ioctl() has got to have the device open.
2411 * If we get here via sysfs, then the max usage count will be zero.
2413 static int deregister_disk(ctlr_info_t *h, int drv_index,
2414 int clear_all, int via_ioctl)
2417 struct gendisk *disk;
2418 drive_info_struct *drv;
2419 int recalculate_highest_lun;
2421 if (!capable(CAP_SYS_RAWIO))
2424 drv = h->drv[drv_index];
2425 disk = h->gendisk[drv_index];
2427 /* make sure logical volume is NOT is use */
2428 if (clear_all || (h->gendisk[0] == disk)) {
2429 if (drv->usage_count > via_ioctl)
2431 } else if (drv->usage_count > 0)
2434 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2436 /* invalidate the devices and deregister the disk. If it is disk
2437 * zero do not deregister it but just zero out it's values. This
2438 * allows us to delete disk zero but keep the controller registered.
2440 if (h->gendisk[0] != disk) {
2441 struct request_queue *q = disk->queue;
2442 if (disk->flags & GENHD_FL_UP) {
2443 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
2447 blk_cleanup_queue(q);
2448 /* If clear_all is set then we are deleting the logical
2449 * drive, not just refreshing its info. For drives
2450 * other than disk 0 we will call put_disk. We do not
2451 * do this for disk 0 as we need it to be able to
2452 * configure the controller.
2455 /* This isn't pretty, but we need to find the
2456 * disk in our array and NULL our the pointer.
2457 * This is so that we will call alloc_disk if
2458 * this index is used again later.
2460 for (i=0; i < CISS_MAX_LUN; i++){
2461 if (h->gendisk[i] == disk) {
2462 h->gendisk[i] = NULL;
2469 set_capacity(disk, 0);
2470 cciss_clear_drive_info(drv);
2475 /* if it was the last disk, find the new hightest lun */
2476 if (clear_all && recalculate_highest_lun) {
2477 int newhighest = -1;
2478 for (i = 0; i <= h->highest_lun; i++) {
2479 /* if the disk has size > 0, it is available */
2480 if (h->drv[i] && h->drv[i]->heads)
2483 h->highest_lun = newhighest;
2488 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2489 size_t size, __u8 page_code, unsigned char *scsi3addr,
2492 ctlr_info_t *h = hba[ctlr];
2493 u64bit buff_dma_handle;
2496 c->cmd_type = CMD_IOCTL_PEND;
2497 c->Header.ReplyQueue = 0;
2499 c->Header.SGList = 1;
2500 c->Header.SGTotal = 1;
2502 c->Header.SGList = 0;
2503 c->Header.SGTotal = 0;
2505 c->Header.Tag.lower = c->busaddr;
2506 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2508 c->Request.Type.Type = cmd_type;
2509 if (cmd_type == TYPE_CMD) {
2512 /* are we trying to read a vital product page */
2513 if (page_code != 0) {
2514 c->Request.CDB[1] = 0x01;
2515 c->Request.CDB[2] = page_code;
2517 c->Request.CDBLen = 6;
2518 c->Request.Type.Attribute = ATTR_SIMPLE;
2519 c->Request.Type.Direction = XFER_READ;
2520 c->Request.Timeout = 0;
2521 c->Request.CDB[0] = CISS_INQUIRY;
2522 c->Request.CDB[4] = size & 0xFF;
2524 case CISS_REPORT_LOG:
2525 case CISS_REPORT_PHYS:
2526 /* Talking to controller so It's a physical command
2527 mode = 00 target = 0. Nothing to write.
2529 c->Request.CDBLen = 12;
2530 c->Request.Type.Attribute = ATTR_SIMPLE;
2531 c->Request.Type.Direction = XFER_READ;
2532 c->Request.Timeout = 0;
2533 c->Request.CDB[0] = cmd;
2534 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2535 c->Request.CDB[7] = (size >> 16) & 0xFF;
2536 c->Request.CDB[8] = (size >> 8) & 0xFF;
2537 c->Request.CDB[9] = size & 0xFF;
2540 case CCISS_READ_CAPACITY:
2541 c->Request.CDBLen = 10;
2542 c->Request.Type.Attribute = ATTR_SIMPLE;
2543 c->Request.Type.Direction = XFER_READ;
2544 c->Request.Timeout = 0;
2545 c->Request.CDB[0] = cmd;
2547 case CCISS_READ_CAPACITY_16:
2548 c->Request.CDBLen = 16;
2549 c->Request.Type.Attribute = ATTR_SIMPLE;
2550 c->Request.Type.Direction = XFER_READ;
2551 c->Request.Timeout = 0;
2552 c->Request.CDB[0] = cmd;
2553 c->Request.CDB[1] = 0x10;
2554 c->Request.CDB[10] = (size >> 24) & 0xFF;
2555 c->Request.CDB[11] = (size >> 16) & 0xFF;
2556 c->Request.CDB[12] = (size >> 8) & 0xFF;
2557 c->Request.CDB[13] = size & 0xFF;
2558 c->Request.Timeout = 0;
2559 c->Request.CDB[0] = cmd;
2561 case CCISS_CACHE_FLUSH:
2562 c->Request.CDBLen = 12;
2563 c->Request.Type.Attribute = ATTR_SIMPLE;
2564 c->Request.Type.Direction = XFER_WRITE;
2565 c->Request.Timeout = 0;
2566 c->Request.CDB[0] = BMIC_WRITE;
2567 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2569 case TEST_UNIT_READY:
2570 c->Request.CDBLen = 6;
2571 c->Request.Type.Attribute = ATTR_SIMPLE;
2572 c->Request.Type.Direction = XFER_NONE;
2573 c->Request.Timeout = 0;
2577 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
2580 } else if (cmd_type == TYPE_MSG) {
2582 case 0: /* ABORT message */
2583 c->Request.CDBLen = 12;
2584 c->Request.Type.Attribute = ATTR_SIMPLE;
2585 c->Request.Type.Direction = XFER_WRITE;
2586 c->Request.Timeout = 0;
2587 c->Request.CDB[0] = cmd; /* abort */
2588 c->Request.CDB[1] = 0; /* abort a command */
2589 /* buff contains the tag of the command to abort */
2590 memcpy(&c->Request.CDB[4], buff, 8);
2592 case 1: /* RESET message */
2593 c->Request.CDBLen = 16;
2594 c->Request.Type.Attribute = ATTR_SIMPLE;
2595 c->Request.Type.Direction = XFER_NONE;
2596 c->Request.Timeout = 0;
2597 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
2598 c->Request.CDB[0] = cmd; /* reset */
2599 c->Request.CDB[1] = 0x03; /* reset a target */
2601 case 3: /* No-Op message */
2602 c->Request.CDBLen = 1;
2603 c->Request.Type.Attribute = ATTR_SIMPLE;
2604 c->Request.Type.Direction = XFER_WRITE;
2605 c->Request.Timeout = 0;
2606 c->Request.CDB[0] = cmd;
2610 "cciss%d: unknown message type %d\n", ctlr, cmd);
2615 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
2618 /* Fill in the scatter gather information */
2620 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
2622 PCI_DMA_BIDIRECTIONAL);
2623 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2624 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2625 c->SG[0].Len = size;
2626 c->SG[0].Ext = 0; /* we are not chaining */
2631 static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2633 switch (c->err_info->ScsiStatus) {
2636 case SAM_STAT_CHECK_CONDITION:
2637 switch (0xf & c->err_info->SenseInfo[2]) {
2638 case 0: return IO_OK; /* no sense */
2639 case 1: return IO_OK; /* recovered error */
2641 if (check_for_unit_attention(h, c))
2642 return IO_NEEDS_RETRY;
2643 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2644 "check condition, sense key = 0x%02x\n",
2645 h->ctlr, c->Request.CDB[0],
2646 c->err_info->SenseInfo[2]);
2650 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2651 "scsi status = 0x%02x\n", h->ctlr,
2652 c->Request.CDB[0], c->err_info->ScsiStatus);
2658 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
2660 int return_status = IO_OK;
2662 if (c->err_info->CommandStatus == CMD_SUCCESS)
2665 switch (c->err_info->CommandStatus) {
2666 case CMD_TARGET_STATUS:
2667 return_status = check_target_status(h, c);
2669 case CMD_DATA_UNDERRUN:
2670 case CMD_DATA_OVERRUN:
2671 /* expected for inquiry and report lun commands */
2674 printk(KERN_WARNING "cciss: cmd 0x%02x is "
2675 "reported invalid\n", c->Request.CDB[0]);
2676 return_status = IO_ERROR;
2678 case CMD_PROTOCOL_ERR:
2679 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2680 "protocol error \n", c->Request.CDB[0]);
2681 return_status = IO_ERROR;
2683 case CMD_HARDWARE_ERR:
2684 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2685 " hardware error\n", c->Request.CDB[0]);
2686 return_status = IO_ERROR;
2688 case CMD_CONNECTION_LOST:
2689 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2690 "connection lost\n", c->Request.CDB[0]);
2691 return_status = IO_ERROR;
2694 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2695 "aborted\n", c->Request.CDB[0]);
2696 return_status = IO_ERROR;
2698 case CMD_ABORT_FAILED:
2699 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2700 "abort failed\n", c->Request.CDB[0]);
2701 return_status = IO_ERROR;
2703 case CMD_UNSOLICITED_ABORT:
2705 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2707 return_status = IO_NEEDS_RETRY;
2710 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2711 "unknown status %x\n", c->Request.CDB[0],
2712 c->err_info->CommandStatus);
2713 return_status = IO_ERROR;
2715 return return_status;
2718 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2721 DECLARE_COMPLETION_ONSTACK(wait);
2722 u64bit buff_dma_handle;
2723 int return_status = IO_OK;
2727 enqueue_cmd_and_start_io(h, c);
2729 wait_for_completion(&wait);
2731 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2734 return_status = process_sendcmd_error(h, c);
2736 if (return_status == IO_NEEDS_RETRY &&
2737 c->retry_count < MAX_CMD_RETRIES) {
2738 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2741 /* erase the old error information */
2742 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2743 return_status = IO_OK;
2744 INIT_COMPLETION(wait);
2749 /* unlock the buffers from DMA */
2750 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2751 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2752 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2753 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2754 return return_status;
2757 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2758 __u8 page_code, unsigned char scsi3addr[],
2761 ctlr_info_t *h = hba[ctlr];
2762 CommandList_struct *c;
2765 c = cmd_alloc(h, 0);
2768 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2769 scsi3addr, cmd_type);
2770 if (return_status == IO_OK)
2771 return_status = sendcmd_withirq_core(h, c, 1);
2774 return return_status;
2777 static void cciss_geometry_inquiry(int ctlr, int logvol,
2778 sector_t total_size,
2779 unsigned int block_size,
2780 InquiryData_struct *inq_buff,
2781 drive_info_struct *drv)
2785 unsigned char scsi3addr[8];
2787 memset(inq_buff, 0, sizeof(InquiryData_struct));
2788 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2789 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2790 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
2791 if (return_code == IO_OK) {
2792 if (inq_buff->data_byte[8] == 0xFF) {
2794 "cciss: reading geometry failed, volume "
2795 "does not support reading geometry\n");
2797 drv->sectors = 32; /* Sectors per track */
2798 drv->cylinders = total_size + 1;
2799 drv->raid_level = RAID_UNKNOWN;
2801 drv->heads = inq_buff->data_byte[6];
2802 drv->sectors = inq_buff->data_byte[7];
2803 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2804 drv->cylinders += inq_buff->data_byte[5];
2805 drv->raid_level = inq_buff->data_byte[8];
2807 drv->block_size = block_size;
2808 drv->nr_blocks = total_size + 1;
2809 t = drv->heads * drv->sectors;
2811 sector_t real_size = total_size + 1;
2812 unsigned long rem = sector_div(real_size, t);
2815 drv->cylinders = real_size;
2817 } else { /* Get geometry failed */
2818 printk(KERN_WARNING "cciss: reading geometry failed\n");
2823 cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
2824 unsigned int *block_size)
2826 ReadCapdata_struct *buf;
2828 unsigned char scsi3addr[8];
2830 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2832 printk(KERN_WARNING "cciss: out of memory\n");
2836 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2837 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2838 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
2839 if (return_code == IO_OK) {
2840 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2841 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2842 } else { /* read capacity command failed */
2843 printk(KERN_WARNING "cciss: read capacity failed\n");
2845 *block_size = BLOCK_SIZE;
2850 static void cciss_read_capacity_16(int ctlr, int logvol,
2851 sector_t *total_size, unsigned int *block_size)
2853 ReadCapdata_struct_16 *buf;
2855 unsigned char scsi3addr[8];
2857 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2859 printk(KERN_WARNING "cciss: out of memory\n");
2863 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2864 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2865 ctlr, buf, sizeof(ReadCapdata_struct_16),
2866 0, scsi3addr, TYPE_CMD);
2867 if (return_code == IO_OK) {
2868 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2869 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2870 } else { /* read capacity command failed */
2871 printk(KERN_WARNING "cciss: read capacity failed\n");
2873 *block_size = BLOCK_SIZE;
2875 printk(KERN_INFO " blocks= %llu block_size= %d\n",
2876 (unsigned long long)*total_size+1, *block_size);
2880 static int cciss_revalidate(struct gendisk *disk)
2882 ctlr_info_t *h = get_host(disk);
2883 drive_info_struct *drv = get_drv(disk);
2886 unsigned int block_size;
2887 sector_t total_size;
2888 InquiryData_struct *inq_buff = NULL;
2890 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2891 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
2892 sizeof(drv->LunID)) == 0) {
2901 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2902 if (inq_buff == NULL) {
2903 printk(KERN_WARNING "cciss: out of memory\n");
2906 if (h->cciss_read == CCISS_READ_10) {
2907 cciss_read_capacity(h->ctlr, logvol,
2908 &total_size, &block_size);
2910 cciss_read_capacity_16(h->ctlr, logvol,
2911 &total_size, &block_size);
2913 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
2916 blk_queue_logical_block_size(drv->queue, drv->block_size);
2917 set_capacity(disk, drv->nr_blocks);
2924 * Map (physical) PCI mem into (virtual) kernel space
2926 static void __iomem *remap_pci_mem(ulong base, ulong size)
2928 ulong page_base = ((ulong) base) & PAGE_MASK;
2929 ulong page_offs = ((ulong) base) - page_base;
2930 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2932 return page_remapped ? (page_remapped + page_offs) : NULL;
2936 * Takes jobs of the Q and sends them to the hardware, then puts it on
2937 * the Q to wait for completion.
2939 static void start_io(ctlr_info_t *h)
2941 CommandList_struct *c;
2943 while (!hlist_empty(&h->reqQ)) {
2944 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
2945 /* can't do anything if fifo is full */
2946 if ((h->access.fifo_full(h))) {
2947 printk(KERN_WARNING "cciss: fifo full\n");
2951 /* Get the first entry from the Request Q */
2955 /* Tell the controller execute command */
2956 h->access.submit_command(h, c);
2958 /* Put job onto the completed Q */
2963 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2964 /* Zeros out the error record and then resends the command back */
2965 /* to the controller */
2966 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
2968 /* erase the old error information */
2969 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2971 /* add it to software queue and then send it to the controller */
2974 if (h->Qdepth > h->maxQsinceinit)
2975 h->maxQsinceinit = h->Qdepth;
2980 static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2981 unsigned int msg_byte, unsigned int host_byte,
2982 unsigned int driver_byte)
2984 /* inverse of macros in scsi.h */
2985 return (scsi_status_byte & 0xff) |
2986 ((msg_byte & 0xff) << 8) |
2987 ((host_byte & 0xff) << 16) |
2988 ((driver_byte & 0xff) << 24);
2991 static inline int evaluate_target_status(ctlr_info_t *h,
2992 CommandList_struct *cmd, int *retry_cmd)
2994 unsigned char sense_key;
2995 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2999 /* If we get in here, it means we got "target status", that is, scsi status */
3000 status_byte = cmd->err_info->ScsiStatus;
3001 driver_byte = DRIVER_OK;
3002 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
3004 if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
3005 host_byte = DID_PASSTHROUGH;
3009 error_value = make_status_bytes(status_byte, msg_byte,
3010 host_byte, driver_byte);
3012 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
3013 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
3014 printk(KERN_WARNING "cciss: cmd %p "
3015 "has SCSI Status 0x%x\n",
3016 cmd, cmd->err_info->ScsiStatus);
3020 /* check the sense key */
3021 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3022 /* no status or recovered error */
3023 if (((sense_key == 0x0) || (sense_key == 0x1)) &&
3024 (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
3027 if (check_for_unit_attention(h, cmd)) {
3028 *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
3032 /* Not SG_IO or similar? */
3033 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
3034 if (error_value != 0)
3035 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3036 " sense key = 0x%x\n", cmd, sense_key);
3040 /* SG_IO or similar, copy sense data back */
3041 if (cmd->rq->sense) {
3042 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3043 cmd->rq->sense_len = cmd->err_info->SenseLen;
3044 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3045 cmd->rq->sense_len);
3047 cmd->rq->sense_len = 0;
3052 /* checks the status of the job and calls complete buffers to mark all
3053 * buffers for the completed job. Note that this function does not need
3054 * to hold the hba/queue lock.
3056 static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3060 struct request *rq = cmd->rq;
3065 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
3067 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3068 goto after_error_processing;
3070 switch (cmd->err_info->CommandStatus) {
3071 case CMD_TARGET_STATUS:
3072 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
3074 case CMD_DATA_UNDERRUN:
3075 if (cmd->rq->cmd_type == REQ_TYPE_FS) {
3076 printk(KERN_WARNING "cciss: cmd %p has"
3077 " completed with data underrun "
3079 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
3082 case CMD_DATA_OVERRUN:
3083 if (cmd->rq->cmd_type == REQ_TYPE_FS)
3084 printk(KERN_WARNING "cciss: cmd %p has"
3085 " completed with data overrun "
3089 printk(KERN_WARNING "cciss: cmd %p is "
3090 "reported invalid\n", cmd);
3091 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3092 cmd->err_info->CommandStatus, DRIVER_OK,
3093 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3094 DID_PASSTHROUGH : DID_ERROR);
3096 case CMD_PROTOCOL_ERR:
3097 printk(KERN_WARNING "cciss: cmd %p has "
3098 "protocol error \n", cmd);
3099 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3100 cmd->err_info->CommandStatus, DRIVER_OK,
3101 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3102 DID_PASSTHROUGH : DID_ERROR);
3104 case CMD_HARDWARE_ERR:
3105 printk(KERN_WARNING "cciss: cmd %p had "
3106 " hardware error\n", cmd);
3107 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3108 cmd->err_info->CommandStatus, DRIVER_OK,
3109 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3110 DID_PASSTHROUGH : DID_ERROR);
3112 case CMD_CONNECTION_LOST:
3113 printk(KERN_WARNING "cciss: cmd %p had "
3114 "connection lost\n", cmd);
3115 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3116 cmd->err_info->CommandStatus, DRIVER_OK,
3117 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3118 DID_PASSTHROUGH : DID_ERROR);
3121 printk(KERN_WARNING "cciss: cmd %p was "
3123 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3124 cmd->err_info->CommandStatus, DRIVER_OK,
3125 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3126 DID_PASSTHROUGH : DID_ABORT);
3128 case CMD_ABORT_FAILED:
3129 printk(KERN_WARNING "cciss: cmd %p reports "
3130 "abort failed\n", cmd);
3131 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3132 cmd->err_info->CommandStatus, DRIVER_OK,
3133 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3134 DID_PASSTHROUGH : DID_ERROR);
3136 case CMD_UNSOLICITED_ABORT:
3137 printk(KERN_WARNING "cciss%d: unsolicited "
3138 "abort %p\n", h->ctlr, cmd);
3139 if (cmd->retry_count < MAX_CMD_RETRIES) {
3142 "cciss%d: retrying %p\n", h->ctlr, cmd);
3146 "cciss%d: %p retried too "
3147 "many times\n", h->ctlr, cmd);
3148 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3149 cmd->err_info->CommandStatus, DRIVER_OK,
3150 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3151 DID_PASSTHROUGH : DID_ABORT);
3154 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
3155 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3156 cmd->err_info->CommandStatus, DRIVER_OK,
3157 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3158 DID_PASSTHROUGH : DID_ERROR);
3161 printk(KERN_WARNING "cciss: cmd %p returned "
3162 "unknown status %x\n", cmd,
3163 cmd->err_info->CommandStatus);
3164 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3165 cmd->err_info->CommandStatus, DRIVER_OK,
3166 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3167 DID_PASSTHROUGH : DID_ERROR);
3170 after_error_processing:
3172 /* We need to return this command */
3174 resend_cciss_cmd(h, cmd);
3177 cmd->rq->completion_data = cmd;
3178 blk_complete_request(cmd->rq);
3181 static inline u32 cciss_tag_contains_index(u32 tag)
3183 #define DIRECT_LOOKUP_BIT 0x10
3184 return tag & DIRECT_LOOKUP_BIT;
3187 static inline u32 cciss_tag_to_index(u32 tag)
3189 #define DIRECT_LOOKUP_SHIFT 5
3190 return tag >> DIRECT_LOOKUP_SHIFT;
3193 static inline u32 cciss_tag_discard_error_bits(u32 tag)
3195 #define CCISS_ERROR_BITS 0x03
3196 return tag & ~CCISS_ERROR_BITS;
3199 static inline void cciss_mark_tag_indexed(u32 *tag)
3201 *tag |= DIRECT_LOOKUP_BIT;
3204 static inline void cciss_set_tag_index(u32 *tag, u32 index)
3206 *tag |= (index << DIRECT_LOOKUP_SHIFT);
3210 * Get a request and submit it to the controller.
3212 static void do_cciss_request(struct request_queue *q)
3214 ctlr_info_t *h = q->queuedata;
3215 CommandList_struct *c;
3218 struct request *creq;
3220 struct scatterlist *tmp_sg;
3221 SGDescriptor_struct *curr_sg;
3222 drive_info_struct *drv;
3227 /* We call start_io here in case there is a command waiting on the
3228 * queue that has not been sent.
3230 if (blk_queue_plugged(q))
3234 creq = blk_peek_request(q);
3238 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
3240 if ((c = cmd_alloc(h, 1)) == NULL)
3243 blk_start_request(creq);
3245 tmp_sg = h->scatter_list[c->cmdindex];
3246 spin_unlock_irq(q->queue_lock);
3248 c->cmd_type = CMD_RWREQ;
3251 /* fill in the request */
3252 drv = creq->rq_disk->private_data;
3253 c->Header.ReplyQueue = 0; /* unused in simple mode */
3254 /* got command from pool, so use the command block index instead */
3255 /* for direct lookups. */
3256 /* The first 2 bits are reserved for controller error reporting. */
3257 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
3258 cciss_mark_tag_indexed(&c->Header.Tag.lower);
3259 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
3260 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3261 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
3262 c->Request.Type.Attribute = ATTR_SIMPLE;
3263 c->Request.Type.Direction =
3264 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
3265 c->Request.Timeout = 0; /* Don't time out */
3267 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
3268 start_blk = blk_rq_pos(creq);
3270 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3271 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
3272 #endif /* CCISS_DEBUG */
3274 sg_init_table(tmp_sg, h->maxsgentries);
3275 seg = blk_rq_map_sg(q, creq, tmp_sg);
3277 /* get the DMA records for the setup */
3278 if (c->Request.Type.Direction == XFER_READ)
3279 dir = PCI_DMA_FROMDEVICE;
3281 dir = PCI_DMA_TODEVICE;
3287 for (i = 0; i < seg; i++) {
3288 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3289 !chained && ((seg - i) > 1)) {
3290 /* Point to next chain block. */
3291 curr_sg = h->cmd_sg_list[c->cmdindex];
3295 curr_sg[sg_index].Len = tmp_sg[i].length;
3296 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
3298 tmp_sg[i].length, dir);
3299 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3300 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3301 curr_sg[sg_index].Ext = 0; /* we are not chaining */
3305 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3306 (seg - (h->max_cmd_sgentries - 1)) *
3307 sizeof(SGDescriptor_struct));
3309 /* track how many SG entries we are using */
3314 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3316 blk_rq_sectors(creq), seg, chained);
3317 #endif /* CCISS_DEBUG */
3319 c->Header.SGTotal = seg + chained;
3320 if (seg <= h->max_cmd_sgentries)
3321 c->Header.SGList = c->Header.SGTotal;
3323 c->Header.SGList = h->max_cmd_sgentries;
3324 set_performant_mode(h, c);
3326 if (likely(creq->cmd_type == REQ_TYPE_FS)) {
3327 if(h->cciss_read == CCISS_READ_10) {
3328 c->Request.CDB[1] = 0;
3329 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
3330 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3331 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3332 c->Request.CDB[5] = start_blk & 0xff;
3333 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
3334 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3335 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
3336 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3338 u32 upper32 = upper_32_bits(start_blk);
3340 c->Request.CDBLen = 16;
3341 c->Request.CDB[1]= 0;
3342 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
3343 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3344 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3345 c->Request.CDB[5]= upper32 & 0xff;
3346 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3347 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3348 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3349 c->Request.CDB[9]= start_blk & 0xff;
3350 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3351 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3352 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3353 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
3354 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3356 } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
3357 c->Request.CDBLen = creq->cmd_len;
3358 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
3360 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3364 spin_lock_irq(q->queue_lock);
3368 if (h->Qdepth > h->maxQsinceinit)
3369 h->maxQsinceinit = h->Qdepth;
3375 /* We will already have the driver lock here so not need
3381 static inline unsigned long get_next_completion(ctlr_info_t *h)
3383 return h->access.command_completed(h);
3386 static inline int interrupt_pending(ctlr_info_t *h)
3388 return h->access.intr_pending(h);
3391 static inline long interrupt_not_for_us(ctlr_info_t *h)
3393 return !(h->msi_vector || h->msix_vector) &&
3394 ((h->access.intr_pending(h) == 0) ||
3395 (h->interrupts_enabled == 0));
3398 static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
3401 if (unlikely(tag_index >= h->nr_cmds)) {
3402 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3408 static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
3412 if (likely(c->cmd_type == CMD_RWREQ))
3413 complete_command(h, c, 0);
3414 else if (c->cmd_type == CMD_IOCTL_PEND)
3415 complete(c->waiting);
3416 #ifdef CONFIG_CISS_SCSI_TAPE
3417 else if (c->cmd_type == CMD_SCSI)
3418 complete_scsi_command(c, 0, raw_tag);
3422 static inline u32 next_command(ctlr_info_t *h)
3426 if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
3427 return h->access.command_completed(h);
3429 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
3430 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
3431 (h->reply_pool_head)++;
3432 h->commands_outstanding--;
3436 /* Check for wraparound */
3437 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
3438 h->reply_pool_head = h->reply_pool;
3439 h->reply_pool_wraparound ^= 1;
3444 /* process completion of an indexed ("direct lookup") command */
3445 static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
3448 CommandList_struct *c;
3450 tag_index = cciss_tag_to_index(raw_tag);
3451 if (bad_tag(h, tag_index, raw_tag))
3452 return next_command(h);
3453 c = h->cmd_pool + tag_index;
3454 finish_cmd(h, c, raw_tag);
3455 return next_command(h);
3458 /* process completion of a non-indexed command */
3459 static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
3462 CommandList_struct *c = NULL;
3463 struct hlist_node *tmp;
3464 __u32 busaddr_masked, tag_masked;
3466 tag = cciss_tag_discard_error_bits(raw_tag);
3467 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3468 busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
3469 tag_masked = cciss_tag_discard_error_bits(tag);
3470 if (busaddr_masked == tag_masked) {
3471 finish_cmd(h, c, raw_tag);
3472 return next_command(h);
3475 bad_tag(h, h->nr_cmds + 1, raw_tag);
3476 return next_command(h);
3479 static irqreturn_t do_cciss_intx(int irq, void *dev_id)
3481 ctlr_info_t *h = dev_id;
3482 unsigned long flags;
3485 if (interrupt_not_for_us(h))
3488 * If there are completed commands in the completion queue,
3489 * we had better do something about it.
3491 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3492 while (interrupt_pending(h)) {
3493 raw_tag = get_next_completion(h);
3494 while (raw_tag != FIFO_EMPTY) {
3495 if (cciss_tag_contains_index(raw_tag))
3496 raw_tag = process_indexed_cmd(h, raw_tag);
3498 raw_tag = process_nonindexed_cmd(h, raw_tag);
3502 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3506 /* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
3507 * check the interrupt pending register because it is not set.
3509 static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
3511 ctlr_info_t *h = dev_id;
3512 unsigned long flags;
3515 if (interrupt_not_for_us(h))
3518 * If there are completed commands in the completion queue,
3519 * we had better do something about it.
3521 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3522 raw_tag = get_next_completion(h);
3523 while (raw_tag != FIFO_EMPTY) {
3524 if (cciss_tag_contains_index(raw_tag))
3525 raw_tag = process_indexed_cmd(h, raw_tag);
3527 raw_tag = process_nonindexed_cmd(h, raw_tag);
3530 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3535 * add_to_scan_list() - add controller to rescan queue
3536 * @h: Pointer to the controller.
3538 * Adds the controller to the rescan queue if not already on the queue.
3540 * returns 1 if added to the queue, 0 if skipped (could be on the
3541 * queue already, or the controller could be initializing or shutting
3544 static int add_to_scan_list(struct ctlr_info *h)
3546 struct ctlr_info *test_h;
3550 if (h->busy_initializing)
3553 if (!mutex_trylock(&h->busy_shutting_down))
3556 mutex_lock(&scan_mutex);
3557 list_for_each_entry(test_h, &scan_q, scan_list) {
3563 if (!found && !h->busy_scanning) {
3564 INIT_COMPLETION(h->scan_wait);
3565 list_add_tail(&h->scan_list, &scan_q);
3568 mutex_unlock(&scan_mutex);
3569 mutex_unlock(&h->busy_shutting_down);
3575 * remove_from_scan_list() - remove controller from rescan queue
3576 * @h: Pointer to the controller.
3578 * Removes the controller from the rescan queue if present. Blocks if
3579 * the controller is currently conducting a rescan. The controller
3580 * can be in one of three states:
3581 * 1. Doesn't need a scan
3582 * 2. On the scan list, but not scanning yet (we remove it)
3583 * 3. Busy scanning (and not on the list). In this case we want to wait for
3584 * the scan to complete to make sure the scanning thread for this
3585 * controller is completely idle.
3587 static void remove_from_scan_list(struct ctlr_info *h)
3589 struct ctlr_info *test_h, *tmp_h;
3591 mutex_lock(&scan_mutex);
3592 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3593 if (test_h == h) { /* state 2. */
3594 list_del(&h->scan_list);
3595 complete_all(&h->scan_wait);
3596 mutex_unlock(&scan_mutex);
3600 if (h->busy_scanning) { /* state 3. */
3601 mutex_unlock(&scan_mutex);
3602 wait_for_completion(&h->scan_wait);
3603 } else { /* state 1, nothing to do. */
3604 mutex_unlock(&scan_mutex);
3609 * scan_thread() - kernel thread used to rescan controllers
3612 * A kernel thread used scan for drive topology changes on
3613 * controllers. The thread processes only one controller at a time
3614 * using a queue. Controllers are added to the queue using
3615 * add_to_scan_list() and removed from the queue either after done
3616 * processing or using remove_from_scan_list().
3620 static int scan_thread(void *data)
3622 struct ctlr_info *h;
3625 set_current_state(TASK_INTERRUPTIBLE);
3627 if (kthread_should_stop())
3631 mutex_lock(&scan_mutex);
3632 if (list_empty(&scan_q)) {
3633 mutex_unlock(&scan_mutex);
3637 h = list_entry(scan_q.next,
3640 list_del(&h->scan_list);
3641 h->busy_scanning = 1;
3642 mutex_unlock(&scan_mutex);
3644 rebuild_lun_table(h, 0, 0);
3645 complete_all(&h->scan_wait);
3646 mutex_lock(&scan_mutex);
3647 h->busy_scanning = 0;
3648 mutex_unlock(&scan_mutex);
3655 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3657 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3660 switch (c->err_info->SenseInfo[12]) {
3662 printk(KERN_WARNING "cciss%d: a state change "
3663 "detected, command retried\n", h->ctlr);
3667 printk(KERN_WARNING "cciss%d: LUN failure "
3668 "detected, action required\n", h->ctlr);
3671 case REPORT_LUNS_CHANGED:
3672 printk(KERN_WARNING "cciss%d: report LUN data "
3673 "changed\n", h->ctlr);
3675 * Here, we could call add_to_scan_list and wake up the scan thread,
3676 * except that it's quite likely that we will get more than one
3677 * REPORT_LUNS_CHANGED condition in quick succession, which means
3678 * that those which occur after the first one will likely happen
3679 * *during* the scan_thread's rescan. And the rescan code is not
3680 * robust enough to restart in the middle, undoing what it has already
3681 * done, and it's not clear that it's even possible to do this, since
3682 * part of what it does is notify the block layer, which starts
3683 * doing it's own i/o to read partition tables and so on, and the
3684 * driver doesn't have visibility to know what might need undoing.
3685 * In any event, if possible, it is horribly complicated to get right
3686 * so we just don't do it for now.
3688 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3692 case POWER_OR_RESET:
3693 printk(KERN_WARNING "cciss%d: a power on "
3694 "or device reset detected\n", h->ctlr);
3697 case UNIT_ATTENTION_CLEARED:
3698 printk(KERN_WARNING "cciss%d: unit attention "
3699 "cleared by another initiator\n", h->ctlr);
3703 printk(KERN_WARNING "cciss%d: unknown "
3704 "unit attention detected\n", h->ctlr);
3710 * We cannot read the structure directly, for portability we must use
3712 * This is for debug only.
3715 static void print_cfg_table(CfgTable_struct *tb)
3720 printk("Controller Configuration information\n");
3721 printk("------------------------------------\n");
3722 for (i = 0; i < 4; i++)
3723 temp_name[i] = readb(&(tb->Signature[i]));
3724 temp_name[4] = '\0';
3725 printk(" Signature = %s\n", temp_name);
3726 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
3727 printk(" Transport methods supported = 0x%x\n",
3728 readl(&(tb->TransportSupport)));
3729 printk(" Transport methods active = 0x%x\n",
3730 readl(&(tb->TransportActive)));
3731 printk(" Requested transport Method = 0x%x\n",
3732 readl(&(tb->HostWrite.TransportRequest)));
3733 printk(" Coalesce Interrupt Delay = 0x%x\n",
3734 readl(&(tb->HostWrite.CoalIntDelay)));
3735 printk(" Coalesce Interrupt Count = 0x%x\n",
3736 readl(&(tb->HostWrite.CoalIntCount)));
3737 printk(" Max outstanding commands = 0x%d\n",
3738 readl(&(tb->CmdsOutMax)));
3739 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3740 for (i = 0; i < 16; i++)
3741 temp_name[i] = readb(&(tb->ServerName[i]));
3742 temp_name[16] = '\0';
3743 printk(" Server Name = %s\n", temp_name);
3744 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
3746 #endif /* CCISS_DEBUG */
3748 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3750 int i, offset, mem_type, bar_type;
3751 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3754 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3755 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3756 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3759 mem_type = pci_resource_flags(pdev, i) &
3760 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3762 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3763 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3764 offset += 4; /* 32 bit */
3766 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3769 default: /* reserved in PCI 2.2 */
3771 "Base address is invalid\n");
3776 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3782 /* Fill in bucket_map[], given nsgs (the max number of
3783 * scatter gather elements supported) and bucket[],
3784 * which is an array of 8 integers. The bucket[] array
3785 * contains 8 different DMA transfer sizes (in 16
3786 * byte increments) which the controller uses to fetch
3787 * commands. This function fills in bucket_map[], which
3788 * maps a given number of scatter gather elements to one of
3789 * the 8 DMA transfer sizes. The point of it is to allow the
3790 * controller to only do as much DMA as needed to fetch the
3791 * command, with the DMA transfer size encoded in the lower
3792 * bits of the command address.
3794 static void calc_bucket_map(int bucket[], int num_buckets,
3795 int nsgs, int *bucket_map)
3799 /* even a command with 0 SGs requires 4 blocks */
3800 #define MINIMUM_TRANSFER_BLOCKS 4
3801 #define NUM_BUCKETS 8
3802 /* Note, bucket_map must have nsgs+1 entries. */
3803 for (i = 0; i <= nsgs; i++) {
3804 /* Compute size of a command with i SG entries */
3805 size = i + MINIMUM_TRANSFER_BLOCKS;
3806 b = num_buckets; /* Assume the biggest bucket */
3807 /* Find the bucket that is just big enough */
3808 for (j = 0; j < 8; j++) {
3809 if (bucket[j] >= size) {
3814 /* for a command with i SG entries, use bucket b. */
3820 cciss_put_controller_into_performant_mode(ctlr_info_t *h)
3823 __u32 trans_support;
3826 * 5 = 1 s/g entry or 4k
3827 * 6 = 2 s/g entry or 8k
3828 * 8 = 4 s/g entry or 16k
3829 * 10 = 6 s/g entry or 24k
3831 int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
3832 unsigned long register_value;
3834 BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
3836 /* Attempt to put controller into performant mode if supported */
3837 /* Does board support performant mode? */
3838 trans_support = readl(&(h->cfgtable->TransportSupport));
3839 if (!(trans_support & PERFORMANT_MODE))
3842 printk(KERN_WARNING "cciss%d: Placing controller into "
3843 "performant mode\n", h->ctlr);
3844 /* Performant mode demands commands on a 32 byte boundary
3845 * pci_alloc_consistent aligns on page boundarys already.
3846 * Just need to check if divisible by 32
3848 if ((sizeof(CommandList_struct) % 32) != 0) {
3849 printk(KERN_WARNING "%s %d %s\n",
3850 "cciss info: command size[",
3851 (int)sizeof(CommandList_struct),
3852 "] not divisible by 32, no performant mode..\n");
3856 /* Performant mode ring buffer and supporting data structures */
3857 h->reply_pool = (__u64 *)pci_alloc_consistent(
3858 h->pdev, h->max_commands * sizeof(__u64),
3859 &(h->reply_pool_dhandle));
3861 /* Need a block fetch table for performant mode */
3862 h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
3863 sizeof(__u32)), GFP_KERNEL);
3865 if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
3868 h->reply_pool_wraparound = 1; /* spec: init to 1 */
3870 /* Controller spec: zero out this buffer. */
3871 memset(h->reply_pool, 0, h->max_commands * sizeof(__u64));
3872 h->reply_pool_head = h->reply_pool;
3874 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3875 calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries,
3876 h->blockFetchTable);
3877 writel(bft[0], &h->transtable->BlockFetch0);
3878 writel(bft[1], &h->transtable->BlockFetch1);
3879 writel(bft[2], &h->transtable->BlockFetch2);
3880 writel(bft[3], &h->transtable->BlockFetch3);
3881 writel(bft[4], &h->transtable->BlockFetch4);
3882 writel(bft[5], &h->transtable->BlockFetch5);
3883 writel(bft[6], &h->transtable->BlockFetch6);
3884 writel(bft[7], &h->transtable->BlockFetch7);
3886 /* size of controller ring buffer */
3887 writel(h->max_commands, &h->transtable->RepQSize);
3888 writel(1, &h->transtable->RepQCount);
3889 writel(0, &h->transtable->RepQCtrAddrLow32);
3890 writel(0, &h->transtable->RepQCtrAddrHigh32);
3891 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3892 writel(0, &h->transtable->RepQAddr0High32);
3893 writel(CFGTBL_Trans_Performant,
3894 &(h->cfgtable->HostWrite.TransportRequest));
3896 h->transMethod = CFGTBL_Trans_Performant;
3897 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3898 /* under certain very rare conditions, this can take awhile.
3899 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3900 * as we enter this code.) */
3901 for (l = 0; l < MAX_CONFIG_WAIT; l++) {
3902 register_value = readl(h->vaddr + SA5_DOORBELL);
3903 if (!(register_value & CFGTBL_ChangeReq))
3905 /* delay and try again */
3906 set_current_state(TASK_INTERRUPTIBLE);
3907 schedule_timeout(10);
3909 register_value = readl(&(h->cfgtable->TransportActive));
3910 if (!(register_value & CFGTBL_Trans_Performant)) {
3911 printk(KERN_WARNING "cciss: unable to get board into"
3912 " performant mode\n");
3916 /* Change the access methods to the performant access methods */
3917 h->access = SA5_performant_access;
3921 kfree(h->blockFetchTable);
3923 pci_free_consistent(h->pdev,
3924 h->max_commands * sizeof(__u64),
3926 h->reply_pool_dhandle);
3929 } /* cciss_put_controller_into_performant_mode */
3931 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3932 * controllers that are capable. If not, we use IO-APIC mode.
3935 static void __devinit cciss_interrupt_mode(ctlr_info_t *c, __u32 board_id)
3937 #ifdef CONFIG_PCI_MSI
3939 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3943 /* Some boards advertise MSI but don't really support it */
3944 if ((board_id == 0x40700E11) ||
3945 (board_id == 0x40800E11) ||
3946 (board_id == 0x40820E11) || (board_id == 0x40830E11))
3947 goto default_int_mode;
3949 if (pci_find_capability(c->pdev, PCI_CAP_ID_MSIX)) {
3950 err = pci_enable_msix(c->pdev, cciss_msix_entries, 4);
3952 c->intr[0] = cciss_msix_entries[0].vector;
3953 c->intr[1] = cciss_msix_entries[1].vector;
3954 c->intr[2] = cciss_msix_entries[2].vector;
3955 c->intr[3] = cciss_msix_entries[3].vector;
3960 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3961 "available\n", err);
3962 goto default_int_mode;
3964 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3966 goto default_int_mode;
3969 if (pci_find_capability(c->pdev, PCI_CAP_ID_MSI)) {
3970 if (!pci_enable_msi(c->pdev)) {
3973 printk(KERN_WARNING "cciss: MSI init failed\n");
3977 #endif /* CONFIG_PCI_MSI */
3978 /* if we get here we're going to use the default interrupt mode */
3979 c->intr[PERF_MODE_INT] = c->pdev->irq;
3983 static int __devinit cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
3986 u32 subsystem_vendor_id, subsystem_device_id;
3988 subsystem_vendor_id = pdev->subsystem_vendor;
3989 subsystem_device_id = pdev->subsystem_device;
3990 *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
3991 subsystem_vendor_id;
3993 for (i = 0; i < ARRAY_SIZE(products); i++) {
3994 /* Stand aside for hpsa driver on request */
3995 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3997 if (*board_id == products[i].board_id)
4000 dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n",
4005 static int __devinit cciss_pci_init(ctlr_info_t *c)
4008 __u32 scratchpad = 0;
4010 __u32 cfg_base_addr;
4011 __u64 cfg_base_addr_index;
4013 int i, prod_index, err;
4015 prod_index = cciss_lookup_board_id(c->pdev, &c->board_id);
4018 c->product_name = products[prod_index].product_name;
4019 c->access = *(products[prod_index].access);
4021 /* check to see if controller has been disabled */
4022 /* BEFORE trying to enable it */
4023 (void)pci_read_config_word(c->pdev, PCI_COMMAND, &command);
4024 if (!(command & 0x02)) {
4026 "cciss: controller appears to be disabled\n");
4030 err = pci_enable_device(c->pdev);
4032 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
4036 err = pci_request_regions(c->pdev, "cciss");
4038 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
4044 printk(KERN_INFO "command = %x\n", command);
4045 printk(KERN_INFO "irq = %x\n", c->pdev->irq);
4046 printk(KERN_INFO "board_id = %x\n", c->board_id);
4047 #endif /* CCISS_DEBUG */
4049 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
4050 * else we use the IO-APIC interrupt assigned to us by system ROM.
4052 cciss_interrupt_mode(c, c->board_id);
4054 /* find the memory BAR */
4055 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
4056 if (pci_resource_flags(c->pdev, i) & IORESOURCE_MEM)
4059 if (i == DEVICE_COUNT_RESOURCE) {
4060 printk(KERN_WARNING "cciss: No memory BAR found\n");
4062 goto err_out_free_res;
4065 c->paddr = pci_resource_start(c->pdev, i); /* addressing mode bits
4070 printk("address 0 = %lx\n", c->paddr);
4071 #endif /* CCISS_DEBUG */
4072 c->vaddr = remap_pci_mem(c->paddr, 0x250);
4074 /* Wait for the board to become ready. (PCI hotplug needs this.)
4075 * We poll for up to 120 secs, once per 100ms. */
4076 for (i = 0; i < 1200; i++) {
4077 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
4078 if (scratchpad == CCISS_FIRMWARE_READY)
4080 set_current_state(TASK_INTERRUPTIBLE);
4081 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
4083 if (scratchpad != CCISS_FIRMWARE_READY) {
4084 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
4086 goto err_out_free_res;
4089 /* get the address index number */
4090 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
4091 cfg_base_addr &= (__u32) 0x0000ffff;
4093 printk("cfg base address = %x\n", cfg_base_addr);
4094 #endif /* CCISS_DEBUG */
4095 cfg_base_addr_index = find_PCI_BAR_index(c->pdev, cfg_base_addr);
4097 printk("cfg base address index = %llx\n",
4098 (unsigned long long)cfg_base_addr_index);
4099 #endif /* CCISS_DEBUG */
4100 if (cfg_base_addr_index == -1) {
4101 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
4103 goto err_out_free_res;
4106 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
4108 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
4109 #endif /* CCISS_DEBUG */
4110 c->cfgtable = remap_pci_mem(pci_resource_start(c->pdev,
4111 cfg_base_addr_index) +
4112 cfg_offset, sizeof(CfgTable_struct));
4113 /* Find performant mode table. */
4114 trans_offset = readl(&(c->cfgtable->TransMethodOffset));
4115 c->transtable = remap_pci_mem(pci_resource_start(c->pdev,
4116 cfg_base_addr_index) + cfg_offset+trans_offset,
4117 sizeof(*c->transtable));
4119 print_cfg_table(c->cfgtable);
4120 #endif /* CCISS_DEBUG */
4122 /* Some controllers support Zero Memory Raid (ZMR).
4123 * When configured in ZMR mode the number of supported
4124 * commands drops to 64. So instead of just setting an
4125 * arbitrary value we make the driver a little smarter.
4126 * We read the config table to tell us how many commands
4127 * are supported on the controller then subtract 4 to
4128 * leave a little room for ioctl calls.
4130 c->max_commands = readl(&(c->cfgtable->MaxPerformantModeCommands));
4131 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
4134 * Limit native command to 32 s/g elements to save dma'able memory.
4135 * Howvever spec says if 0, use 31
4138 c->max_cmd_sgentries = 31;
4139 if (c->maxsgentries > 512) {
4140 c->max_cmd_sgentries = 32;
4141 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
4142 c->maxsgentries -= 1; /* account for chain pointer */
4144 c->maxsgentries = 31; /* Default to traditional value */
4145 c->chainsize = 0; /* traditional */
4148 c->nr_cmds = c->max_commands - 4;
4149 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
4150 (readb(&c->cfgtable->Signature[1]) != 'I') ||
4151 (readb(&c->cfgtable->Signature[2]) != 'S') ||
4152 (readb(&c->cfgtable->Signature[3]) != 'S')) {
4153 printk("Does not appear to be a valid CISS config table\n");
4155 goto err_out_free_res;
4159 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
4161 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
4163 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
4167 /* Disabling DMA prefetch and refetch for the P600.
4168 * An ASIC bug may result in accesses to invalid memory addresses.
4169 * We've disabled prefetch for some time now. Testing with XEN
4170 * kernels revealed a bug in the refetch if dom0 resides on a P600.
4172 if (c->board_id == 0x3225103C) {
4175 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
4176 dma_prefetch |= 0x8000;
4177 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
4178 pci_read_config_dword(c->pdev, PCI_COMMAND_PARITY,
4181 pci_write_config_dword(c->pdev, PCI_COMMAND_PARITY,
4186 printk(KERN_WARNING "Trying to put board into Performant mode\n");
4187 #endif /* CCISS_DEBUG */
4188 cciss_put_controller_into_performant_mode(c);
4193 * Deliberately omit pci_disable_device(): it does something nasty to
4194 * Smart Array controllers that pci_enable_device does not undo
4196 pci_release_regions(c->pdev);
4200 /* Function to find the first free pointer into our hba[] array
4201 * Returns -1 if no free entries are left.
4203 static int alloc_cciss_hba(void)
4207 for (i = 0; i < MAX_CTLR; i++) {
4211 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
4218 printk(KERN_WARNING "cciss: This driver supports a maximum"
4219 " of %d controllers.\n", MAX_CTLR);
4222 printk(KERN_ERR "cciss: out of memory.\n");
4226 static void free_hba(int n)
4228 ctlr_info_t *h = hba[n];
4232 for (i = 0; i < h->highest_lun + 1; i++)
4233 if (h->gendisk[i] != NULL)
4234 put_disk(h->gendisk[i]);
4238 /* Send a message CDB to the firmware. */
4239 static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
4242 CommandListHeader_struct CommandHeader;
4243 RequestBlock_struct Request;
4244 ErrDescriptor_struct ErrorDescriptor;
4246 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4249 uint32_t paddr32, tag;
4250 void __iomem *vaddr;
4253 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4257 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4258 CCISS commands, so they must be allocated from the lower 4GiB of
4260 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4266 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4272 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4273 although there's no guarantee, we assume that the address is at
4274 least 4-byte aligned (most likely, it's page-aligned). */
4277 cmd->CommandHeader.ReplyQueue = 0;
4278 cmd->CommandHeader.SGList = 0;
4279 cmd->CommandHeader.SGTotal = 0;
4280 cmd->CommandHeader.Tag.lower = paddr32;
4281 cmd->CommandHeader.Tag.upper = 0;
4282 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4284 cmd->Request.CDBLen = 16;
4285 cmd->Request.Type.Type = TYPE_MSG;
4286 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4287 cmd->Request.Type.Direction = XFER_NONE;
4288 cmd->Request.Timeout = 0; /* Don't time out */
4289 cmd->Request.CDB[0] = opcode;
4290 cmd->Request.CDB[1] = type;
4291 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4293 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4294 cmd->ErrorDescriptor.Addr.upper = 0;
4295 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4297 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4299 for (i = 0; i < 10; i++) {
4300 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4301 if ((tag & ~3) == paddr32)
4303 schedule_timeout_uninterruptible(HZ);
4308 /* we leak the DMA buffer here ... no choice since the controller could
4309 still complete the command. */
4311 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4316 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4319 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4324 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4329 #define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4330 #define cciss_noop(p) cciss_message(p, 3, 0)
4332 static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4334 /* the #defines are stolen from drivers/pci/msi.h. */
4335 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4336 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4341 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4343 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4344 if (control & PCI_MSI_FLAGS_ENABLE) {
4345 printk(KERN_INFO "cciss: resetting MSI\n");
4346 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4350 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4352 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4353 if (control & PCI_MSIX_FLAGS_ENABLE) {
4354 printk(KERN_INFO "cciss: resetting MSI-X\n");
4355 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4362 /* This does a hard reset of the controller using PCI power management
4364 static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4366 u16 pmcsr, saved_config_space[32];
4369 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4371 /* This is very nearly the same thing as
4373 pci_save_state(pci_dev);
4374 pci_set_power_state(pci_dev, PCI_D3hot);
4375 pci_set_power_state(pci_dev, PCI_D0);
4376 pci_restore_state(pci_dev);
4378 but we can't use these nice canned kernel routines on
4379 kexec, because they also check the MSI/MSI-X state in PCI
4380 configuration space and do the wrong thing when it is
4381 set/cleared. Also, the pci_save/restore_state functions
4382 violate the ordering requirements for restoring the
4383 configuration space from the CCISS document (see the
4384 comment below). So we roll our own .... */
4386 for (i = 0; i < 32; i++)
4387 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4389 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4391 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4395 /* Quoting from the Open CISS Specification: "The Power
4396 * Management Control/Status Register (CSR) controls the power
4397 * state of the device. The normal operating state is D0,
4398 * CSR=00h. The software off state is D3, CSR=03h. To reset
4399 * the controller, place the interface device in D3 then to
4400 * D0, this causes a secondary PCI reset which will reset the
4403 /* enter the D3hot power management state */
4404 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4405 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4407 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4409 schedule_timeout_uninterruptible(HZ >> 1);
4411 /* enter the D0 power management state */
4412 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4414 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4416 schedule_timeout_uninterruptible(HZ >> 1);
4418 /* Restore the PCI configuration space. The Open CISS
4419 * Specification says, "Restore the PCI Configuration
4420 * Registers, offsets 00h through 60h. It is important to
4421 * restore the command register, 16-bits at offset 04h,
4422 * last. Do not restore the configuration status register,
4423 * 16-bits at offset 06h." Note that the offset is 2*i. */
4424 for (i = 0; i < 32; i++) {
4425 if (i == 2 || i == 3)
4427 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4430 pci_write_config_word(pdev, 4, saved_config_space[2]);
4436 * This is it. Find all the controllers and register them. I really hate
4437 * stealing all these major device numbers.
4438 * returns the number of block devices registered.
4440 static int __devinit cciss_init_one(struct pci_dev *pdev,
4441 const struct pci_device_id *ent)
4447 int dac, return_code;
4448 InquiryData_struct *inq_buff;
4450 if (reset_devices) {
4451 /* Reset the controller with a PCI power-cycle */
4452 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4455 /* Now try to get the controller to respond to a no-op. Some
4456 devices (notably the HP Smart Array 5i Controller) need
4457 up to 30 seconds to respond. */
4458 for (i=0; i<30; i++) {
4459 if (cciss_noop(pdev) == 0)
4462 schedule_timeout_uninterruptible(HZ);
4465 printk(KERN_ERR "cciss: controller seems dead\n");
4470 i = alloc_cciss_hba();
4474 hba[i]->pdev = pdev;
4475 hba[i]->busy_initializing = 1;
4476 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4477 INIT_HLIST_HEAD(&hba[i]->reqQ);
4478 mutex_init(&hba[i]->busy_shutting_down);
4480 if (cciss_pci_init(hba[i]) != 0)
4481 goto clean_no_release_regions;
4483 sprintf(hba[i]->devname, "cciss%d", i);
4486 init_completion(&hba[i]->scan_wait);
4488 if (cciss_create_hba_sysfs_entry(hba[i]))
4491 /* configure PCI DMA stuff */
4492 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
4494 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
4497 printk(KERN_ERR "cciss: no suitable DMA available\n");
4502 * register with the major number, or get a dynamic major number
4503 * by passing 0 as argument. This is done for greater than
4504 * 8 controller support.
4506 if (i < MAX_CTLR_ORIG)
4507 hba[i]->major = COMPAQ_CISS_MAJOR + i;
4508 rc = register_blkdev(hba[i]->major, hba[i]->devname);
4509 if (rc == -EBUSY || rc == -EINVAL) {
4511 "cciss: Unable to get major number %d for %s "
4512 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
4515 if (i >= MAX_CTLR_ORIG)
4519 /* make sure the board interrupts are off */
4520 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
4521 if (hba[i]->msi_vector || hba[i]->msix_vector) {
4522 if (request_irq(hba[i]->intr[PERF_MODE_INT],
4524 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4525 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
4526 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
4530 if (request_irq(hba[i]->intr[PERF_MODE_INT], do_cciss_intx,
4531 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4532 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
4533 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
4538 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
4539 hba[i]->devname, pdev->device, pci_name(pdev),
4540 hba[i]->intr[PERF_MODE_INT], dac ? "" : " not");
4542 hba[i]->cmd_pool_bits =
4543 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4544 * sizeof(unsigned long), GFP_KERNEL);
4545 hba[i]->cmd_pool = (CommandList_struct *)
4546 pci_alloc_consistent(hba[i]->pdev,
4547 hba[i]->nr_cmds * sizeof(CommandList_struct),
4548 &(hba[i]->cmd_pool_dhandle));
4549 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4550 pci_alloc_consistent(hba[i]->pdev,
4551 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4552 &(hba[i]->errinfo_pool_dhandle));
4553 if ((hba[i]->cmd_pool_bits == NULL)
4554 || (hba[i]->cmd_pool == NULL)
4555 || (hba[i]->errinfo_pool == NULL)) {
4556 printk(KERN_ERR "cciss: out of memory");
4560 /* Need space for temp scatter list */
4561 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4562 sizeof(struct scatterlist *),
4564 for (k = 0; k < hba[i]->nr_cmds; k++) {
4565 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4566 hba[i]->maxsgentries,
4568 if (hba[i]->scatter_list[k] == NULL) {
4569 printk(KERN_ERR "cciss%d: could not allocate "
4574 hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i],
4575 hba[i]->chainsize, hba[i]->nr_cmds);
4576 if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0)
4579 spin_lock_init(&hba[i]->lock);
4581 /* Initialize the pdev driver private data.
4582 have it point to hba[i]. */
4583 pci_set_drvdata(pdev, hba[i]);
4584 /* command and error info recs zeroed out before
4586 memset(hba[i]->cmd_pool_bits, 0,
4587 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4588 * sizeof(unsigned long));
4590 hba[i]->num_luns = 0;
4591 hba[i]->highest_lun = -1;
4592 for (j = 0; j < CISS_MAX_LUN; j++) {
4593 hba[i]->drv[j] = NULL;
4594 hba[i]->gendisk[j] = NULL;
4597 cciss_scsi_setup(i);
4599 /* Turn the interrupts on so we can service requests */
4600 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4602 /* Get the firmware version */
4603 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4604 if (inq_buff == NULL) {
4605 printk(KERN_ERR "cciss: out of memory\n");
4609 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
4610 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
4611 if (return_code == IO_OK) {
4612 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4613 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4614 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4615 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4616 } else { /* send command failed */
4617 printk(KERN_WARNING "cciss: unable to determine firmware"
4618 " version of controller\n");
4624 hba[i]->cciss_max_sectors = 8192;
4626 rebuild_lun_table(hba[i], 1, 0);
4627 hba[i]->busy_initializing = 0;
4631 kfree(hba[i]->cmd_pool_bits);
4632 /* Free up sg elements */
4633 for (k = 0; k < hba[i]->nr_cmds; k++)
4634 kfree(hba[i]->scatter_list[k]);
4635 kfree(hba[i]->scatter_list);
4636 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
4637 if (hba[i]->cmd_pool)
4638 pci_free_consistent(hba[i]->pdev,
4639 hba[i]->nr_cmds * sizeof(CommandList_struct),
4640 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4641 if (hba[i]->errinfo_pool)
4642 pci_free_consistent(hba[i]->pdev,
4643 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4644 hba[i]->errinfo_pool,
4645 hba[i]->errinfo_pool_dhandle);
4646 free_irq(hba[i]->intr[PERF_MODE_INT], hba[i]);
4648 unregister_blkdev(hba[i]->major, hba[i]->devname);
4650 cciss_destroy_hba_sysfs_entry(hba[i]);
4652 pci_release_regions(pdev);
4653 clean_no_release_regions:
4654 hba[i]->busy_initializing = 0;
4657 * Deliberately omit pci_disable_device(): it does something nasty to
4658 * Smart Array controllers that pci_enable_device does not undo
4660 pci_set_drvdata(pdev, NULL);
4665 static void cciss_shutdown(struct pci_dev *pdev)
4671 h = pci_get_drvdata(pdev);
4672 flush_buf = kzalloc(4, GFP_KERNEL);
4675 "cciss:%d cache not flushed, out of memory.\n",
4679 /* write all data in the battery backed cache to disk */
4680 memset(flush_buf, 0, 4);
4681 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4682 4, 0, CTLR_LUNID, TYPE_CMD);
4684 if (return_code != IO_OK)
4685 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4687 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4688 free_irq(h->intr[PERF_MODE_INT], h);
4691 static void __devexit cciss_remove_one(struct pci_dev *pdev)
4693 ctlr_info_t *tmp_ptr;
4696 if (pci_get_drvdata(pdev) == NULL) {
4697 printk(KERN_ERR "cciss: Unable to remove device \n");
4701 tmp_ptr = pci_get_drvdata(pdev);
4703 if (hba[i] == NULL) {
4704 printk(KERN_ERR "cciss: device appears to "
4705 "already be removed \n");
4709 mutex_lock(&hba[i]->busy_shutting_down);
4711 remove_from_scan_list(hba[i]);
4712 remove_proc_entry(hba[i]->devname, proc_cciss);
4713 unregister_blkdev(hba[i]->major, hba[i]->devname);
4715 /* remove it from the disk list */
4716 for (j = 0; j < CISS_MAX_LUN; j++) {
4717 struct gendisk *disk = hba[i]->gendisk[j];
4719 struct request_queue *q = disk->queue;
4721 if (disk->flags & GENHD_FL_UP) {
4722 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
4726 blk_cleanup_queue(q);
4730 #ifdef CONFIG_CISS_SCSI_TAPE
4731 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
4734 cciss_shutdown(pdev);
4736 #ifdef CONFIG_PCI_MSI
4737 if (hba[i]->msix_vector)
4738 pci_disable_msix(hba[i]->pdev);
4739 else if (hba[i]->msi_vector)
4740 pci_disable_msi(hba[i]->pdev);
4741 #endif /* CONFIG_PCI_MSI */
4743 iounmap(hba[i]->vaddr);
4745 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
4746 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4747 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4748 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
4749 kfree(hba[i]->cmd_pool_bits);
4750 /* Free up sg elements */
4751 for (j = 0; j < hba[i]->nr_cmds; j++)
4752 kfree(hba[i]->scatter_list[j]);
4753 kfree(hba[i]->scatter_list);
4754 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
4756 * Deliberately omit pci_disable_device(): it does something nasty to
4757 * Smart Array controllers that pci_enable_device does not undo
4759 pci_release_regions(pdev);
4760 pci_set_drvdata(pdev, NULL);
4761 cciss_destroy_hba_sysfs_entry(hba[i]);
4762 mutex_unlock(&hba[i]->busy_shutting_down);
4766 static struct pci_driver cciss_pci_driver = {
4768 .probe = cciss_init_one,
4769 .remove = __devexit_p(cciss_remove_one),
4770 .id_table = cciss_pci_device_id, /* id_table */
4771 .shutdown = cciss_shutdown,
4775 * This is it. Register the PCI driver information for the cards we control
4776 * the OS will call our registered routines when it finds one of our cards.
4778 static int __init cciss_init(void)
4783 * The hardware requires that commands are aligned on a 64-bit
4784 * boundary. Given that we use pci_alloc_consistent() to allocate an
4785 * array of them, the size must be a multiple of 8 bytes.
4787 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
4788 printk(KERN_INFO DRIVER_NAME "\n");
4790 err = bus_register(&cciss_bus_type);
4794 /* Start the scan thread */
4795 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4796 if (IS_ERR(cciss_scan_thread)) {
4797 err = PTR_ERR(cciss_scan_thread);
4798 goto err_bus_unregister;
4801 /* Register for our PCI devices */
4802 err = pci_register_driver(&cciss_pci_driver);
4804 goto err_thread_stop;
4809 kthread_stop(cciss_scan_thread);
4811 bus_unregister(&cciss_bus_type);
4816 static void __exit cciss_cleanup(void)
4820 pci_unregister_driver(&cciss_pci_driver);
4821 /* double check that all controller entrys have been removed */
4822 for (i = 0; i < MAX_CTLR; i++) {
4823 if (hba[i] != NULL) {
4824 printk(KERN_WARNING "cciss: had to remove"
4825 " controller %d\n", i);
4826 cciss_remove_one(hba[i]->pdev);
4829 kthread_stop(cciss_scan_thread);
4830 remove_proc_entry("driver/cciss", NULL);
4831 bus_unregister(&cciss_bus_type);
4834 module_init(cciss_init);
4835 module_exit(cciss_cleanup);