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_release(struct gendisk *disk, fmode_t mode);
182 static int do_ioctl(struct block_device *bdev, fmode_t mode,
183 unsigned int cmd, unsigned long arg);
184 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
185 unsigned int cmd, unsigned long arg);
186 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
188 static int cciss_revalidate(struct gendisk *disk);
189 static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
190 static int deregister_disk(ctlr_info_t *h, int drv_index,
191 int clear_all, int via_ioctl);
193 static void cciss_read_capacity(int ctlr, int logvol,
194 sector_t *total_size, unsigned int *block_size);
195 static void cciss_read_capacity_16(int ctlr, int logvol,
196 sector_t *total_size, unsigned int *block_size);
197 static void cciss_geometry_inquiry(int ctlr, int logvol,
199 unsigned int block_size, InquiryData_struct *inq_buff,
200 drive_info_struct *drv);
201 static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
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,
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++;
1046 * Close. Sync first.
1048 static int cciss_release(struct gendisk *disk, fmode_t mode)
1050 ctlr_info_t *host = get_host(disk);
1051 drive_info_struct *drv = get_drv(disk);
1054 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
1055 #endif /* CCISS_DEBUG */
1058 host->usage_count--;
1062 static int do_ioctl(struct block_device *bdev, fmode_t mode,
1063 unsigned cmd, unsigned long arg)
1067 ret = cciss_ioctl(bdev, mode, cmd, arg);
1072 #ifdef CONFIG_COMPAT
1074 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1075 unsigned cmd, unsigned long arg);
1076 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1077 unsigned cmd, unsigned long arg);
1079 static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1080 unsigned cmd, unsigned long arg)
1083 case CCISS_GETPCIINFO:
1084 case CCISS_GETINTINFO:
1085 case CCISS_SETINTINFO:
1086 case CCISS_GETNODENAME:
1087 case CCISS_SETNODENAME:
1088 case CCISS_GETHEARTBEAT:
1089 case CCISS_GETBUSTYPES:
1090 case CCISS_GETFIRMVER:
1091 case CCISS_GETDRIVVER:
1092 case CCISS_REVALIDVOLS:
1093 case CCISS_DEREGDISK:
1094 case CCISS_REGNEWDISK:
1096 case CCISS_RESCANDISK:
1097 case CCISS_GETLUNINFO:
1098 return do_ioctl(bdev, mode, cmd, arg);
1100 case CCISS_PASSTHRU32:
1101 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1102 case CCISS_BIG_PASSTHRU32:
1103 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1106 return -ENOIOCTLCMD;
1110 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1111 unsigned cmd, unsigned long arg)
1113 IOCTL32_Command_struct __user *arg32 =
1114 (IOCTL32_Command_struct __user *) arg;
1115 IOCTL_Command_struct arg64;
1116 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1122 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1123 sizeof(arg64.LUN_info));
1125 copy_from_user(&arg64.Request, &arg32->Request,
1126 sizeof(arg64.Request));
1128 copy_from_user(&arg64.error_info, &arg32->error_info,
1129 sizeof(arg64.error_info));
1130 err |= get_user(arg64.buf_size, &arg32->buf_size);
1131 err |= get_user(cp, &arg32->buf);
1132 arg64.buf = compat_ptr(cp);
1133 err |= copy_to_user(p, &arg64, sizeof(arg64));
1138 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1142 copy_in_user(&arg32->error_info, &p->error_info,
1143 sizeof(arg32->error_info));
1149 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1150 unsigned cmd, unsigned long arg)
1152 BIG_IOCTL32_Command_struct __user *arg32 =
1153 (BIG_IOCTL32_Command_struct __user *) arg;
1154 BIG_IOCTL_Command_struct arg64;
1155 BIG_IOCTL_Command_struct __user *p =
1156 compat_alloc_user_space(sizeof(arg64));
1162 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1163 sizeof(arg64.LUN_info));
1165 copy_from_user(&arg64.Request, &arg32->Request,
1166 sizeof(arg64.Request));
1168 copy_from_user(&arg64.error_info, &arg32->error_info,
1169 sizeof(arg64.error_info));
1170 err |= get_user(arg64.buf_size, &arg32->buf_size);
1171 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1172 err |= get_user(cp, &arg32->buf);
1173 arg64.buf = compat_ptr(cp);
1174 err |= copy_to_user(p, &arg64, sizeof(arg64));
1179 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1183 copy_in_user(&arg32->error_info, &p->error_info,
1184 sizeof(arg32->error_info));
1191 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1193 drive_info_struct *drv = get_drv(bdev->bd_disk);
1195 if (!drv->cylinders)
1198 geo->heads = drv->heads;
1199 geo->sectors = drv->sectors;
1200 geo->cylinders = drv->cylinders;
1204 static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1206 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1207 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1208 (void)check_for_unit_attention(host, c);
1213 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
1214 unsigned int cmd, unsigned long arg)
1216 struct gendisk *disk = bdev->bd_disk;
1217 ctlr_info_t *host = get_host(disk);
1218 drive_info_struct *drv = get_drv(disk);
1219 int ctlr = host->ctlr;
1220 void __user *argp = (void __user *)arg;
1223 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
1224 #endif /* CCISS_DEBUG */
1227 case CCISS_GETPCIINFO:
1229 cciss_pci_info_struct pciinfo;
1233 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1234 pciinfo.bus = host->pdev->bus->number;
1235 pciinfo.dev_fn = host->pdev->devfn;
1236 pciinfo.board_id = host->board_id;
1238 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1242 case CCISS_GETINTINFO:
1244 cciss_coalint_struct intinfo;
1248 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1250 readl(&host->cfgtable->HostWrite.CoalIntCount);
1252 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1256 case CCISS_SETINTINFO:
1258 cciss_coalint_struct intinfo;
1259 unsigned long flags;
1264 if (!capable(CAP_SYS_ADMIN))
1267 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1269 if ((intinfo.delay == 0) && (intinfo.count == 0))
1271 // printk("cciss_ioctl: delay and count cannot be 0\n");
1274 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1275 /* Update the field, and then ring the doorbell */
1276 writel(intinfo.delay,
1277 &(host->cfgtable->HostWrite.CoalIntDelay));
1278 writel(intinfo.count,
1279 &(host->cfgtable->HostWrite.CoalIntCount));
1280 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1282 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1283 if (!(readl(host->vaddr + SA5_DOORBELL)
1284 & CFGTBL_ChangeReq))
1286 /* delay and try again */
1289 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1290 if (i >= MAX_IOCTL_CONFIG_WAIT)
1294 case CCISS_GETNODENAME:
1296 NodeName_type NodeName;
1301 for (i = 0; i < 16; i++)
1303 readb(&host->cfgtable->ServerName[i]);
1304 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1308 case CCISS_SETNODENAME:
1310 NodeName_type NodeName;
1311 unsigned long flags;
1316 if (!capable(CAP_SYS_ADMIN))
1320 (NodeName, argp, sizeof(NodeName_type)))
1323 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1325 /* Update the field, and then ring the doorbell */
1326 for (i = 0; i < 16; i++)
1328 &host->cfgtable->ServerName[i]);
1330 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1332 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1333 if (!(readl(host->vaddr + SA5_DOORBELL)
1334 & CFGTBL_ChangeReq))
1336 /* delay and try again */
1339 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1340 if (i >= MAX_IOCTL_CONFIG_WAIT)
1345 case CCISS_GETHEARTBEAT:
1347 Heartbeat_type heartbeat;
1351 heartbeat = readl(&host->cfgtable->HeartBeat);
1353 (argp, &heartbeat, sizeof(Heartbeat_type)))
1357 case CCISS_GETBUSTYPES:
1359 BusTypes_type BusTypes;
1363 BusTypes = readl(&host->cfgtable->BusTypes);
1365 (argp, &BusTypes, sizeof(BusTypes_type)))
1369 case CCISS_GETFIRMVER:
1371 FirmwareVer_type firmware;
1375 memcpy(firmware, host->firm_ver, 4);
1378 (argp, firmware, sizeof(FirmwareVer_type)))
1382 case CCISS_GETDRIVVER:
1384 DriverVer_type DriverVer = DRIVER_VERSION;
1390 (argp, &DriverVer, sizeof(DriverVer_type)))
1395 case CCISS_DEREGDISK:
1397 case CCISS_REVALIDVOLS:
1398 return rebuild_lun_table(host, 0, 1);
1400 case CCISS_GETLUNINFO:{
1401 LogvolInfo_struct luninfo;
1403 memcpy(&luninfo.LunID, drv->LunID,
1404 sizeof(luninfo.LunID));
1405 luninfo.num_opens = drv->usage_count;
1406 luninfo.num_parts = 0;
1407 if (copy_to_user(argp, &luninfo,
1408 sizeof(LogvolInfo_struct)))
1412 case CCISS_PASSTHRU:
1414 IOCTL_Command_struct iocommand;
1415 CommandList_struct *c;
1418 DECLARE_COMPLETION_ONSTACK(wait);
1423 if (!capable(CAP_SYS_RAWIO))
1427 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1429 if ((iocommand.buf_size < 1) &&
1430 (iocommand.Request.Type.Direction != XFER_NONE)) {
1433 #if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1434 /* Check kmalloc limits */
1435 if (iocommand.buf_size > 128000)
1438 if (iocommand.buf_size > 0) {
1439 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1443 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1444 /* Copy the data into the buffer we created */
1446 (buff, iocommand.buf, iocommand.buf_size)) {
1451 memset(buff, 0, iocommand.buf_size);
1453 if ((c = cmd_alloc(host, 0)) == NULL) {
1457 /* Fill in the command type */
1458 c->cmd_type = CMD_IOCTL_PEND;
1459 /* Fill in Command Header */
1460 c->Header.ReplyQueue = 0; /* unused in simple mode */
1461 if (iocommand.buf_size > 0) /* buffer to fill */
1463 c->Header.SGList = 1;
1464 c->Header.SGTotal = 1;
1465 } else /* no buffers to fill */
1467 c->Header.SGList = 0;
1468 c->Header.SGTotal = 0;
1470 c->Header.LUN = iocommand.LUN_info;
1471 /* use the kernel address the cmd block for tag */
1472 c->Header.Tag.lower = c->busaddr;
1474 /* Fill in Request block */
1475 c->Request = iocommand.Request;
1477 /* Fill in the scatter gather information */
1478 if (iocommand.buf_size > 0) {
1479 temp64.val = pci_map_single(host->pdev, buff,
1481 PCI_DMA_BIDIRECTIONAL);
1482 c->SG[0].Addr.lower = temp64.val32.lower;
1483 c->SG[0].Addr.upper = temp64.val32.upper;
1484 c->SG[0].Len = iocommand.buf_size;
1485 c->SG[0].Ext = 0; /* we are not chaining */
1489 enqueue_cmd_and_start_io(host, c);
1490 wait_for_completion(&wait);
1492 /* unlock the buffers from DMA */
1493 temp64.val32.lower = c->SG[0].Addr.lower;
1494 temp64.val32.upper = c->SG[0].Addr.upper;
1495 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1497 PCI_DMA_BIDIRECTIONAL);
1499 check_ioctl_unit_attention(host, c);
1501 /* Copy the error information out */
1502 iocommand.error_info = *(c->err_info);
1504 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1506 cmd_free(host, c, 0);
1510 if (iocommand.Request.Type.Direction == XFER_READ) {
1511 /* Copy the data out of the buffer we created */
1513 (iocommand.buf, buff, iocommand.buf_size)) {
1515 cmd_free(host, c, 0);
1520 cmd_free(host, c, 0);
1523 case CCISS_BIG_PASSTHRU:{
1524 BIG_IOCTL_Command_struct *ioc;
1525 CommandList_struct *c;
1526 unsigned char **buff = NULL;
1527 int *buff_size = NULL;
1532 DECLARE_COMPLETION_ONSTACK(wait);
1535 BYTE __user *data_ptr;
1539 if (!capable(CAP_SYS_RAWIO))
1541 ioc = (BIG_IOCTL_Command_struct *)
1542 kmalloc(sizeof(*ioc), GFP_KERNEL);
1547 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1551 if ((ioc->buf_size < 1) &&
1552 (ioc->Request.Type.Direction != XFER_NONE)) {
1556 /* Check kmalloc limits using all SGs */
1557 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1561 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1566 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1571 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
1577 left = ioc->buf_size;
1578 data_ptr = ioc->buf;
1581 ioc->malloc_size) ? ioc->
1583 buff_size[sg_used] = sz;
1584 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1585 if (buff[sg_used] == NULL) {
1589 if (ioc->Request.Type.Direction == XFER_WRITE) {
1591 (buff[sg_used], data_ptr, sz)) {
1596 memset(buff[sg_used], 0, sz);
1602 if ((c = cmd_alloc(host, 0)) == NULL) {
1606 c->cmd_type = CMD_IOCTL_PEND;
1607 c->Header.ReplyQueue = 0;
1609 if (ioc->buf_size > 0) {
1610 c->Header.SGList = sg_used;
1611 c->Header.SGTotal = sg_used;
1613 c->Header.SGList = 0;
1614 c->Header.SGTotal = 0;
1616 c->Header.LUN = ioc->LUN_info;
1617 c->Header.Tag.lower = c->busaddr;
1619 c->Request = ioc->Request;
1620 if (ioc->buf_size > 0) {
1621 for (i = 0; i < sg_used; i++) {
1623 pci_map_single(host->pdev, buff[i],
1625 PCI_DMA_BIDIRECTIONAL);
1626 c->SG[i].Addr.lower =
1628 c->SG[i].Addr.upper =
1630 c->SG[i].Len = buff_size[i];
1631 c->SG[i].Ext = 0; /* we are not chaining */
1635 enqueue_cmd_and_start_io(host, c);
1636 wait_for_completion(&wait);
1637 /* unlock the buffers from DMA */
1638 for (i = 0; i < sg_used; i++) {
1639 temp64.val32.lower = c->SG[i].Addr.lower;
1640 temp64.val32.upper = c->SG[i].Addr.upper;
1641 pci_unmap_single(host->pdev,
1642 (dma_addr_t) temp64.val, buff_size[i],
1643 PCI_DMA_BIDIRECTIONAL);
1645 check_ioctl_unit_attention(host, c);
1646 /* Copy the error information out */
1647 ioc->error_info = *(c->err_info);
1648 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1649 cmd_free(host, c, 0);
1653 if (ioc->Request.Type.Direction == XFER_READ) {
1654 /* Copy the data out of the buffer we created */
1655 BYTE __user *ptr = ioc->buf;
1656 for (i = 0; i < sg_used; i++) {
1658 (ptr, buff[i], buff_size[i])) {
1659 cmd_free(host, c, 0);
1663 ptr += buff_size[i];
1666 cmd_free(host, c, 0);
1670 for (i = 0; i < sg_used; i++)
1679 /* scsi_cmd_ioctl handles these, below, though some are not */
1680 /* very meaningful for cciss. SG_IO is the main one people want. */
1682 case SG_GET_VERSION_NUM:
1683 case SG_SET_TIMEOUT:
1684 case SG_GET_TIMEOUT:
1685 case SG_GET_RESERVED_SIZE:
1686 case SG_SET_RESERVED_SIZE:
1687 case SG_EMULATED_HOST:
1689 case SCSI_IOCTL_SEND_COMMAND:
1690 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
1692 /* scsi_cmd_ioctl would normally handle these, below, but */
1693 /* they aren't a good fit for cciss, as CD-ROMs are */
1694 /* not supported, and we don't have any bus/target/lun */
1695 /* which we present to the kernel. */
1697 case CDROM_SEND_PACKET:
1698 case CDROMCLOSETRAY:
1700 case SCSI_IOCTL_GET_IDLUN:
1701 case SCSI_IOCTL_GET_BUS_NUMBER:
1707 static void cciss_check_queues(ctlr_info_t *h)
1709 int start_queue = h->next_to_run;
1712 /* check to see if we have maxed out the number of commands that can
1713 * be placed on the queue. If so then exit. We do this check here
1714 * in case the interrupt we serviced was from an ioctl and did not
1715 * free any new commands.
1717 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
1720 /* We have room on the queue for more commands. Now we need to queue
1721 * them up. We will also keep track of the next queue to run so
1722 * that every queue gets a chance to be started first.
1724 for (i = 0; i < h->highest_lun + 1; i++) {
1725 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1726 /* make sure the disk has been added and the drive is real
1727 * because this can be called from the middle of init_one.
1729 if (!h->drv[curr_queue])
1731 if (!(h->drv[curr_queue]->queue) ||
1732 !(h->drv[curr_queue]->heads))
1734 blk_start_queue(h->gendisk[curr_queue]->queue);
1736 /* check to see if we have maxed out the number of commands
1737 * that can be placed on the queue.
1739 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
1740 if (curr_queue == start_queue) {
1742 (start_queue + 1) % (h->highest_lun + 1);
1745 h->next_to_run = curr_queue;
1752 static void cciss_softirq_done(struct request *rq)
1754 CommandList_struct *cmd = rq->completion_data;
1755 ctlr_info_t *h = hba[cmd->ctlr];
1756 SGDescriptor_struct *curr_sg = cmd->SG;
1758 unsigned long flags;
1762 if (cmd->Request.Type.Direction == XFER_READ)
1763 ddir = PCI_DMA_FROMDEVICE;
1765 ddir = PCI_DMA_TODEVICE;
1767 /* command did not need to be retried */
1768 /* unmap the DMA mapping for all the scatter gather elements */
1769 for (i = 0; i < cmd->Header.SGList; i++) {
1770 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
1771 cciss_unmap_sg_chain_block(h, cmd);
1772 /* Point to the next block */
1773 curr_sg = h->cmd_sg_list[cmd->cmdindex];
1776 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1777 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1778 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1784 printk("Done with %p\n", rq);
1785 #endif /* CCISS_DEBUG */
1787 /* set the residual count for pc requests */
1788 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1789 rq->resid_len = cmd->err_info->ResidualCnt;
1791 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
1793 spin_lock_irqsave(&h->lock, flags);
1794 cmd_free(h, cmd, 1);
1795 cciss_check_queues(h);
1796 spin_unlock_irqrestore(&h->lock, flags);
1799 static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1800 unsigned char scsi3addr[], uint32_t log_unit)
1802 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1803 sizeof(h->drv[log_unit]->LunID));
1806 /* This function gets the SCSI vendor, model, and revision of a logical drive
1807 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1808 * they cannot be read.
1810 static void cciss_get_device_descr(int ctlr, int logvol,
1811 char *vendor, char *model, char *rev)
1814 InquiryData_struct *inq_buf;
1815 unsigned char scsi3addr[8];
1821 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1825 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1826 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1827 scsi3addr, TYPE_CMD);
1829 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1830 vendor[VENDOR_LEN] = '\0';
1831 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1832 model[MODEL_LEN] = '\0';
1833 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1834 rev[REV_LEN] = '\0';
1841 /* This function gets the serial number of a logical drive via
1842 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1843 * number cannot be had, for whatever reason, 16 bytes of 0xff
1844 * are returned instead.
1846 static void cciss_get_serial_no(int ctlr, int logvol,
1847 unsigned char *serial_no, int buflen)
1849 #define PAGE_83_INQ_BYTES 64
1852 unsigned char scsi3addr[8];
1856 memset(serial_no, 0xff, buflen);
1857 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1860 memset(serial_no, 0, buflen);
1861 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1862 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1863 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
1865 memcpy(serial_no, &buf[8], buflen);
1871 * cciss_add_disk sets up the block device queue for a logical drive
1873 static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1876 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1878 goto init_queue_failure;
1879 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1880 disk->major = h->major;
1881 disk->first_minor = drv_index << NWD_SHIFT;
1882 disk->fops = &cciss_fops;
1883 if (cciss_create_ld_sysfs_entry(h, drv_index))
1885 disk->private_data = h->drv[drv_index];
1886 disk->driverfs_dev = &h->drv[drv_index]->dev;
1888 /* Set up queue information */
1889 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1891 /* This is a hardware imposed limit. */
1892 blk_queue_max_segments(disk->queue, h->maxsgentries);
1894 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
1896 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1898 disk->queue->queuedata = h;
1900 blk_queue_logical_block_size(disk->queue,
1901 h->drv[drv_index]->block_size);
1903 /* Make sure all queue data is written out before */
1904 /* setting h->drv[drv_index]->queue, as setting this */
1905 /* allows the interrupt handler to start the queue */
1907 h->drv[drv_index]->queue = disk->queue;
1912 blk_cleanup_queue(disk->queue);
1918 /* This function will check the usage_count of the drive to be updated/added.
1919 * If the usage_count is zero and it is a heretofore unknown drive, or,
1920 * the drive's capacity, geometry, or serial number has changed,
1921 * then the drive information will be updated and the disk will be
1922 * re-registered with the kernel. If these conditions don't hold,
1923 * then it will be left alone for the next reboot. The exception to this
1924 * is disk 0 which will always be left registered with the kernel since it
1925 * is also the controller node. Any changes to disk 0 will show up on
1928 static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1931 ctlr_info_t *h = hba[ctlr];
1932 struct gendisk *disk;
1933 InquiryData_struct *inq_buff = NULL;
1934 unsigned int block_size;
1935 sector_t total_size;
1936 unsigned long flags = 0;
1938 drive_info_struct *drvinfo;
1940 /* Get information about the disk and modify the driver structure */
1941 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1942 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
1943 if (inq_buff == NULL || drvinfo == NULL)
1946 /* testing to see if 16-byte CDBs are already being used */
1947 if (h->cciss_read == CCISS_READ_16) {
1948 cciss_read_capacity_16(h->ctlr, drv_index,
1949 &total_size, &block_size);
1952 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
1953 /* if read_capacity returns all F's this volume is >2TB */
1954 /* in size so we switch to 16-byte CDB's for all */
1955 /* read/write ops */
1956 if (total_size == 0xFFFFFFFFULL) {
1957 cciss_read_capacity_16(ctlr, drv_index,
1958 &total_size, &block_size);
1959 h->cciss_read = CCISS_READ_16;
1960 h->cciss_write = CCISS_WRITE_16;
1962 h->cciss_read = CCISS_READ_10;
1963 h->cciss_write = CCISS_WRITE_10;
1967 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
1969 drvinfo->block_size = block_size;
1970 drvinfo->nr_blocks = total_size + 1;
1972 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
1973 drvinfo->model, drvinfo->rev);
1974 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
1975 sizeof(drvinfo->serial_no));
1976 /* Save the lunid in case we deregister the disk, below. */
1977 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1978 sizeof(drvinfo->LunID));
1980 /* Is it the same disk we already know, and nothing's changed? */
1981 if (h->drv[drv_index]->raid_level != -1 &&
1982 ((memcmp(drvinfo->serial_no,
1983 h->drv[drv_index]->serial_no, 16) == 0) &&
1984 drvinfo->block_size == h->drv[drv_index]->block_size &&
1985 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1986 drvinfo->heads == h->drv[drv_index]->heads &&
1987 drvinfo->sectors == h->drv[drv_index]->sectors &&
1988 drvinfo->cylinders == h->drv[drv_index]->cylinders))
1989 /* The disk is unchanged, nothing to update */
1992 /* If we get here it's not the same disk, or something's changed,
1993 * so we need to * deregister it, and re-register it, if it's not
1995 * If the disk already exists then deregister it before proceeding
1996 * (unless it's the first disk (for the controller node).
1998 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
1999 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
2000 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2001 h->drv[drv_index]->busy_configuring = 1;
2002 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2004 /* deregister_disk sets h->drv[drv_index]->queue = NULL
2005 * which keeps the interrupt handler from starting
2008 ret = deregister_disk(h, drv_index, 0, via_ioctl);
2011 /* If the disk is in use return */
2015 /* Save the new information from cciss_geometry_inquiry
2016 * and serial number inquiry. If the disk was deregistered
2017 * above, then h->drv[drv_index] will be NULL.
2019 if (h->drv[drv_index] == NULL) {
2020 drvinfo->device_initialized = 0;
2021 h->drv[drv_index] = drvinfo;
2022 drvinfo = NULL; /* so it won't be freed below. */
2024 /* special case for cxd0 */
2025 h->drv[drv_index]->block_size = drvinfo->block_size;
2026 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2027 h->drv[drv_index]->heads = drvinfo->heads;
2028 h->drv[drv_index]->sectors = drvinfo->sectors;
2029 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2030 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2031 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2032 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2034 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2035 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2039 disk = h->gendisk[drv_index];
2040 set_capacity(disk, h->drv[drv_index]->nr_blocks);
2042 /* If it's not disk 0 (drv_index != 0)
2043 * or if it was disk 0, but there was previously
2044 * no actual corresponding configured logical drive
2045 * (raid_leve == -1) then we want to update the
2046 * logical drive's information.
2048 if (drv_index || first_time) {
2049 if (cciss_add_disk(h, disk, drv_index) != 0) {
2050 cciss_free_gendisk(h, drv_index);
2051 cciss_free_drive_info(h, drv_index);
2052 printk(KERN_WARNING "cciss:%d could not update "
2053 "disk %d\n", h->ctlr, drv_index);
2063 printk(KERN_ERR "cciss: out of memory\n");
2067 /* This function will find the first index of the controllers drive array
2068 * that has a null drv pointer and allocate the drive info struct and
2069 * will return that index This is where new drives will be added.
2070 * If the index to be returned is greater than the highest_lun index for
2071 * the controller then highest_lun is set * to this new index.
2072 * If there are no available indexes or if tha allocation fails, then -1
2073 * is returned. * "controller_node" is used to know if this is a real
2074 * logical drive, or just the controller node, which determines if this
2075 * counts towards highest_lun.
2077 static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
2080 drive_info_struct *drv;
2082 /* Search for an empty slot for our drive info */
2083 for (i = 0; i < CISS_MAX_LUN; i++) {
2085 /* if not cxd0 case, and it's occupied, skip it. */
2086 if (h->drv[i] && i != 0)
2089 * If it's cxd0 case, and drv is alloc'ed already, and a
2090 * disk is configured there, skip it.
2092 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2096 * We've found an empty slot. Update highest_lun
2097 * provided this isn't just the fake cxd0 controller node.
2099 if (i > h->highest_lun && !controller_node)
2102 /* If adding a real disk at cxd0, and it's already alloc'ed */
2103 if (i == 0 && h->drv[i] != NULL)
2107 * Found an empty slot, not already alloc'ed. Allocate it.
2108 * Mark it with raid_level == -1, so we know it's new later on.
2110 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2113 drv->raid_level = -1; /* so we know it's new */
2120 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2122 kfree(h->drv[drv_index]);
2123 h->drv[drv_index] = NULL;
2126 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2128 put_disk(h->gendisk[drv_index]);
2129 h->gendisk[drv_index] = NULL;
2132 /* cciss_add_gendisk finds a free hba[]->drv structure
2133 * and allocates a gendisk if needed, and sets the lunid
2134 * in the drvinfo structure. It returns the index into
2135 * the ->drv[] array, or -1 if none are free.
2136 * is_controller_node indicates whether highest_lun should
2137 * count this disk, or if it's only being added to provide
2138 * a means to talk to the controller in case no logical
2139 * drives have yet been configured.
2141 static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2142 int controller_node)
2146 drv_index = cciss_alloc_drive_info(h, controller_node);
2147 if (drv_index == -1)
2150 /*Check if the gendisk needs to be allocated */
2151 if (!h->gendisk[drv_index]) {
2152 h->gendisk[drv_index] =
2153 alloc_disk(1 << NWD_SHIFT);
2154 if (!h->gendisk[drv_index]) {
2155 printk(KERN_ERR "cciss%d: could not "
2156 "allocate a new disk %d\n",
2157 h->ctlr, drv_index);
2158 goto err_free_drive_info;
2161 memcpy(h->drv[drv_index]->LunID, lunid,
2162 sizeof(h->drv[drv_index]->LunID));
2163 if (cciss_create_ld_sysfs_entry(h, drv_index))
2165 /* Don't need to mark this busy because nobody */
2166 /* else knows about this disk yet to contend */
2167 /* for access to it. */
2168 h->drv[drv_index]->busy_configuring = 0;
2173 cciss_free_gendisk(h, drv_index);
2174 err_free_drive_info:
2175 cciss_free_drive_info(h, drv_index);
2179 /* This is for the special case of a controller which
2180 * has no logical drives. In this case, we still need
2181 * to register a disk so the controller can be accessed
2182 * by the Array Config Utility.
2184 static void cciss_add_controller_node(ctlr_info_t *h)
2186 struct gendisk *disk;
2189 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2192 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
2193 if (drv_index == -1)
2195 h->drv[drv_index]->block_size = 512;
2196 h->drv[drv_index]->nr_blocks = 0;
2197 h->drv[drv_index]->heads = 0;
2198 h->drv[drv_index]->sectors = 0;
2199 h->drv[drv_index]->cylinders = 0;
2200 h->drv[drv_index]->raid_level = -1;
2201 memset(h->drv[drv_index]->serial_no, 0, 16);
2202 disk = h->gendisk[drv_index];
2203 if (cciss_add_disk(h, disk, drv_index) == 0)
2205 cciss_free_gendisk(h, drv_index);
2206 cciss_free_drive_info(h, drv_index);
2208 printk(KERN_WARNING "cciss%d: could not "
2209 "add disk 0.\n", h->ctlr);
2213 /* This function will add and remove logical drives from the Logical
2214 * drive array of the controller and maintain persistency of ordering
2215 * so that mount points are preserved until the next reboot. This allows
2216 * for the removal of logical drives in the middle of the drive array
2217 * without a re-ordering of those drives.
2219 * h = The controller to perform the operations on
2221 static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2226 ReportLunData_struct *ld_buff = NULL;
2232 unsigned char lunid[8] = CTLR_LUNID;
2233 unsigned long flags;
2235 if (!capable(CAP_SYS_RAWIO))
2238 /* Set busy_configuring flag for this operation */
2239 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2240 if (h->busy_configuring) {
2241 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2244 h->busy_configuring = 1;
2245 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2247 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2248 if (ld_buff == NULL)
2251 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
2252 sizeof(ReportLunData_struct),
2253 0, CTLR_LUNID, TYPE_CMD);
2255 if (return_code == IO_OK)
2256 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2257 else { /* reading number of logical volumes failed */
2258 printk(KERN_WARNING "cciss: report logical volume"
2259 " command failed\n");
2264 num_luns = listlength / 8; /* 8 bytes per entry */
2265 if (num_luns > CISS_MAX_LUN) {
2266 num_luns = CISS_MAX_LUN;
2267 printk(KERN_WARNING "cciss: more luns configured"
2268 " on controller than can be handled by"
2273 cciss_add_controller_node(h);
2275 /* Compare controller drive array to driver's drive array
2276 * to see if any drives are missing on the controller due
2277 * to action of Array Config Utility (user deletes drive)
2278 * and deregister logical drives which have disappeared.
2280 for (i = 0; i <= h->highest_lun; i++) {
2284 /* skip holes in the array from already deleted drives */
2285 if (h->drv[i] == NULL)
2288 for (j = 0; j < num_luns; j++) {
2289 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2290 if (memcmp(h->drv[i]->LunID, lunid,
2291 sizeof(lunid)) == 0) {
2297 /* Deregister it from the OS, it's gone. */
2298 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2299 h->drv[i]->busy_configuring = 1;
2300 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2301 return_code = deregister_disk(h, i, 1, via_ioctl);
2302 if (h->drv[i] != NULL)
2303 h->drv[i]->busy_configuring = 0;
2307 /* Compare controller drive array to driver's drive array.
2308 * Check for updates in the drive information and any new drives
2309 * on the controller due to ACU adding logical drives, or changing
2310 * a logical drive's size, etc. Reregister any new/changed drives
2312 for (i = 0; i < num_luns; i++) {
2317 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
2318 /* Find if the LUN is already in the drive array
2319 * of the driver. If so then update its info
2320 * if not in use. If it does not exist then find
2321 * the first free index and add it.
2323 for (j = 0; j <= h->highest_lun; j++) {
2324 if (h->drv[j] != NULL &&
2325 memcmp(h->drv[j]->LunID, lunid,
2326 sizeof(h->drv[j]->LunID)) == 0) {
2333 /* check if the drive was found already in the array */
2335 drv_index = cciss_add_gendisk(h, lunid, 0);
2336 if (drv_index == -1)
2339 cciss_update_drive_info(ctlr, drv_index, first_time,
2345 h->busy_configuring = 0;
2346 /* We return -1 here to tell the ACU that we have registered/updated
2347 * all of the drives that we can and to keep it from calling us
2352 printk(KERN_ERR "cciss: out of memory\n");
2353 h->busy_configuring = 0;
2357 static void cciss_clear_drive_info(drive_info_struct *drive_info)
2359 /* zero out the disk size info */
2360 drive_info->nr_blocks = 0;
2361 drive_info->block_size = 0;
2362 drive_info->heads = 0;
2363 drive_info->sectors = 0;
2364 drive_info->cylinders = 0;
2365 drive_info->raid_level = -1;
2366 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2367 memset(drive_info->model, 0, sizeof(drive_info->model));
2368 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2369 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2371 * don't clear the LUNID though, we need to remember which
2376 /* This function will deregister the disk and it's queue from the
2377 * kernel. It must be called with the controller lock held and the
2378 * drv structures busy_configuring flag set. It's parameters are:
2380 * disk = This is the disk to be deregistered
2381 * drv = This is the drive_info_struct associated with the disk to be
2382 * deregistered. It contains information about the disk used
2384 * clear_all = This flag determines whether or not the disk information
2385 * is going to be completely cleared out and the highest_lun
2386 * reset. Sometimes we want to clear out information about
2387 * the disk in preparation for re-adding it. In this case
2388 * the highest_lun should be left unchanged and the LunID
2389 * should not be cleared.
2391 * This indicates whether we've reached this path via ioctl.
2392 * This affects the maximum usage count allowed for c0d0 to be messed with.
2393 * If this path is reached via ioctl(), then the max_usage_count will
2394 * be 1, as the process calling ioctl() has got to have the device open.
2395 * If we get here via sysfs, then the max usage count will be zero.
2397 static int deregister_disk(ctlr_info_t *h, int drv_index,
2398 int clear_all, int via_ioctl)
2401 struct gendisk *disk;
2402 drive_info_struct *drv;
2403 int recalculate_highest_lun;
2405 if (!capable(CAP_SYS_RAWIO))
2408 drv = h->drv[drv_index];
2409 disk = h->gendisk[drv_index];
2411 /* make sure logical volume is NOT is use */
2412 if (clear_all || (h->gendisk[0] == disk)) {
2413 if (drv->usage_count > via_ioctl)
2415 } else if (drv->usage_count > 0)
2418 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2420 /* invalidate the devices and deregister the disk. If it is disk
2421 * zero do not deregister it but just zero out it's values. This
2422 * allows us to delete disk zero but keep the controller registered.
2424 if (h->gendisk[0] != disk) {
2425 struct request_queue *q = disk->queue;
2426 if (disk->flags & GENHD_FL_UP) {
2427 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
2431 blk_cleanup_queue(q);
2432 /* If clear_all is set then we are deleting the logical
2433 * drive, not just refreshing its info. For drives
2434 * other than disk 0 we will call put_disk. We do not
2435 * do this for disk 0 as we need it to be able to
2436 * configure the controller.
2439 /* This isn't pretty, but we need to find the
2440 * disk in our array and NULL our the pointer.
2441 * This is so that we will call alloc_disk if
2442 * this index is used again later.
2444 for (i=0; i < CISS_MAX_LUN; i++){
2445 if (h->gendisk[i] == disk) {
2446 h->gendisk[i] = NULL;
2453 set_capacity(disk, 0);
2454 cciss_clear_drive_info(drv);
2459 /* if it was the last disk, find the new hightest lun */
2460 if (clear_all && recalculate_highest_lun) {
2461 int newhighest = -1;
2462 for (i = 0; i <= h->highest_lun; i++) {
2463 /* if the disk has size > 0, it is available */
2464 if (h->drv[i] && h->drv[i]->heads)
2467 h->highest_lun = newhighest;
2472 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2473 size_t size, __u8 page_code, unsigned char *scsi3addr,
2476 ctlr_info_t *h = hba[ctlr];
2477 u64bit buff_dma_handle;
2480 c->cmd_type = CMD_IOCTL_PEND;
2481 c->Header.ReplyQueue = 0;
2483 c->Header.SGList = 1;
2484 c->Header.SGTotal = 1;
2486 c->Header.SGList = 0;
2487 c->Header.SGTotal = 0;
2489 c->Header.Tag.lower = c->busaddr;
2490 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2492 c->Request.Type.Type = cmd_type;
2493 if (cmd_type == TYPE_CMD) {
2496 /* are we trying to read a vital product page */
2497 if (page_code != 0) {
2498 c->Request.CDB[1] = 0x01;
2499 c->Request.CDB[2] = page_code;
2501 c->Request.CDBLen = 6;
2502 c->Request.Type.Attribute = ATTR_SIMPLE;
2503 c->Request.Type.Direction = XFER_READ;
2504 c->Request.Timeout = 0;
2505 c->Request.CDB[0] = CISS_INQUIRY;
2506 c->Request.CDB[4] = size & 0xFF;
2508 case CISS_REPORT_LOG:
2509 case CISS_REPORT_PHYS:
2510 /* Talking to controller so It's a physical command
2511 mode = 00 target = 0. Nothing to write.
2513 c->Request.CDBLen = 12;
2514 c->Request.Type.Attribute = ATTR_SIMPLE;
2515 c->Request.Type.Direction = XFER_READ;
2516 c->Request.Timeout = 0;
2517 c->Request.CDB[0] = cmd;
2518 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2519 c->Request.CDB[7] = (size >> 16) & 0xFF;
2520 c->Request.CDB[8] = (size >> 8) & 0xFF;
2521 c->Request.CDB[9] = size & 0xFF;
2524 case CCISS_READ_CAPACITY:
2525 c->Request.CDBLen = 10;
2526 c->Request.Type.Attribute = ATTR_SIMPLE;
2527 c->Request.Type.Direction = XFER_READ;
2528 c->Request.Timeout = 0;
2529 c->Request.CDB[0] = cmd;
2531 case CCISS_READ_CAPACITY_16:
2532 c->Request.CDBLen = 16;
2533 c->Request.Type.Attribute = ATTR_SIMPLE;
2534 c->Request.Type.Direction = XFER_READ;
2535 c->Request.Timeout = 0;
2536 c->Request.CDB[0] = cmd;
2537 c->Request.CDB[1] = 0x10;
2538 c->Request.CDB[10] = (size >> 24) & 0xFF;
2539 c->Request.CDB[11] = (size >> 16) & 0xFF;
2540 c->Request.CDB[12] = (size >> 8) & 0xFF;
2541 c->Request.CDB[13] = size & 0xFF;
2542 c->Request.Timeout = 0;
2543 c->Request.CDB[0] = cmd;
2545 case CCISS_CACHE_FLUSH:
2546 c->Request.CDBLen = 12;
2547 c->Request.Type.Attribute = ATTR_SIMPLE;
2548 c->Request.Type.Direction = XFER_WRITE;
2549 c->Request.Timeout = 0;
2550 c->Request.CDB[0] = BMIC_WRITE;
2551 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2553 case TEST_UNIT_READY:
2554 c->Request.CDBLen = 6;
2555 c->Request.Type.Attribute = ATTR_SIMPLE;
2556 c->Request.Type.Direction = XFER_NONE;
2557 c->Request.Timeout = 0;
2561 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
2564 } else if (cmd_type == TYPE_MSG) {
2566 case 0: /* ABORT message */
2567 c->Request.CDBLen = 12;
2568 c->Request.Type.Attribute = ATTR_SIMPLE;
2569 c->Request.Type.Direction = XFER_WRITE;
2570 c->Request.Timeout = 0;
2571 c->Request.CDB[0] = cmd; /* abort */
2572 c->Request.CDB[1] = 0; /* abort a command */
2573 /* buff contains the tag of the command to abort */
2574 memcpy(&c->Request.CDB[4], buff, 8);
2576 case 1: /* RESET message */
2577 c->Request.CDBLen = 16;
2578 c->Request.Type.Attribute = ATTR_SIMPLE;
2579 c->Request.Type.Direction = XFER_NONE;
2580 c->Request.Timeout = 0;
2581 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
2582 c->Request.CDB[0] = cmd; /* reset */
2583 c->Request.CDB[1] = 0x03; /* reset a target */
2585 case 3: /* No-Op message */
2586 c->Request.CDBLen = 1;
2587 c->Request.Type.Attribute = ATTR_SIMPLE;
2588 c->Request.Type.Direction = XFER_WRITE;
2589 c->Request.Timeout = 0;
2590 c->Request.CDB[0] = cmd;
2594 "cciss%d: unknown message type %d\n", ctlr, cmd);
2599 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
2602 /* Fill in the scatter gather information */
2604 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
2606 PCI_DMA_BIDIRECTIONAL);
2607 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2608 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2609 c->SG[0].Len = size;
2610 c->SG[0].Ext = 0; /* we are not chaining */
2615 static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2617 switch (c->err_info->ScsiStatus) {
2620 case SAM_STAT_CHECK_CONDITION:
2621 switch (0xf & c->err_info->SenseInfo[2]) {
2622 case 0: return IO_OK; /* no sense */
2623 case 1: return IO_OK; /* recovered error */
2625 if (check_for_unit_attention(h, c))
2626 return IO_NEEDS_RETRY;
2627 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2628 "check condition, sense key = 0x%02x\n",
2629 h->ctlr, c->Request.CDB[0],
2630 c->err_info->SenseInfo[2]);
2634 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2635 "scsi status = 0x%02x\n", h->ctlr,
2636 c->Request.CDB[0], c->err_info->ScsiStatus);
2642 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
2644 int return_status = IO_OK;
2646 if (c->err_info->CommandStatus == CMD_SUCCESS)
2649 switch (c->err_info->CommandStatus) {
2650 case CMD_TARGET_STATUS:
2651 return_status = check_target_status(h, c);
2653 case CMD_DATA_UNDERRUN:
2654 case CMD_DATA_OVERRUN:
2655 /* expected for inquiry and report lun commands */
2658 printk(KERN_WARNING "cciss: cmd 0x%02x is "
2659 "reported invalid\n", c->Request.CDB[0]);
2660 return_status = IO_ERROR;
2662 case CMD_PROTOCOL_ERR:
2663 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2664 "protocol error \n", c->Request.CDB[0]);
2665 return_status = IO_ERROR;
2667 case CMD_HARDWARE_ERR:
2668 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2669 " hardware error\n", c->Request.CDB[0]);
2670 return_status = IO_ERROR;
2672 case CMD_CONNECTION_LOST:
2673 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2674 "connection lost\n", c->Request.CDB[0]);
2675 return_status = IO_ERROR;
2678 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2679 "aborted\n", c->Request.CDB[0]);
2680 return_status = IO_ERROR;
2682 case CMD_ABORT_FAILED:
2683 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2684 "abort failed\n", c->Request.CDB[0]);
2685 return_status = IO_ERROR;
2687 case CMD_UNSOLICITED_ABORT:
2689 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2691 return_status = IO_NEEDS_RETRY;
2694 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2695 "unknown status %x\n", c->Request.CDB[0],
2696 c->err_info->CommandStatus);
2697 return_status = IO_ERROR;
2699 return return_status;
2702 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2705 DECLARE_COMPLETION_ONSTACK(wait);
2706 u64bit buff_dma_handle;
2707 int return_status = IO_OK;
2711 enqueue_cmd_and_start_io(h, c);
2713 wait_for_completion(&wait);
2715 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2718 return_status = process_sendcmd_error(h, c);
2720 if (return_status == IO_NEEDS_RETRY &&
2721 c->retry_count < MAX_CMD_RETRIES) {
2722 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2725 /* erase the old error information */
2726 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2727 return_status = IO_OK;
2728 INIT_COMPLETION(wait);
2733 /* unlock the buffers from DMA */
2734 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2735 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2736 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2737 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2738 return return_status;
2741 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2742 __u8 page_code, unsigned char scsi3addr[],
2745 ctlr_info_t *h = hba[ctlr];
2746 CommandList_struct *c;
2749 c = cmd_alloc(h, 0);
2752 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2753 scsi3addr, cmd_type);
2754 if (return_status == IO_OK)
2755 return_status = sendcmd_withirq_core(h, c, 1);
2758 return return_status;
2761 static void cciss_geometry_inquiry(int ctlr, int logvol,
2762 sector_t total_size,
2763 unsigned int block_size,
2764 InquiryData_struct *inq_buff,
2765 drive_info_struct *drv)
2769 unsigned char scsi3addr[8];
2771 memset(inq_buff, 0, sizeof(InquiryData_struct));
2772 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2773 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2774 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
2775 if (return_code == IO_OK) {
2776 if (inq_buff->data_byte[8] == 0xFF) {
2778 "cciss: reading geometry failed, volume "
2779 "does not support reading geometry\n");
2781 drv->sectors = 32; /* Sectors per track */
2782 drv->cylinders = total_size + 1;
2783 drv->raid_level = RAID_UNKNOWN;
2785 drv->heads = inq_buff->data_byte[6];
2786 drv->sectors = inq_buff->data_byte[7];
2787 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2788 drv->cylinders += inq_buff->data_byte[5];
2789 drv->raid_level = inq_buff->data_byte[8];
2791 drv->block_size = block_size;
2792 drv->nr_blocks = total_size + 1;
2793 t = drv->heads * drv->sectors;
2795 sector_t real_size = total_size + 1;
2796 unsigned long rem = sector_div(real_size, t);
2799 drv->cylinders = real_size;
2801 } else { /* Get geometry failed */
2802 printk(KERN_WARNING "cciss: reading geometry failed\n");
2807 cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
2808 unsigned int *block_size)
2810 ReadCapdata_struct *buf;
2812 unsigned char scsi3addr[8];
2814 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2816 printk(KERN_WARNING "cciss: out of memory\n");
2820 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2821 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2822 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
2823 if (return_code == IO_OK) {
2824 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2825 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2826 } else { /* read capacity command failed */
2827 printk(KERN_WARNING "cciss: read capacity failed\n");
2829 *block_size = BLOCK_SIZE;
2834 static void cciss_read_capacity_16(int ctlr, int logvol,
2835 sector_t *total_size, unsigned int *block_size)
2837 ReadCapdata_struct_16 *buf;
2839 unsigned char scsi3addr[8];
2841 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2843 printk(KERN_WARNING "cciss: out of memory\n");
2847 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2848 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2849 ctlr, buf, sizeof(ReadCapdata_struct_16),
2850 0, scsi3addr, TYPE_CMD);
2851 if (return_code == IO_OK) {
2852 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2853 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2854 } else { /* read capacity command failed */
2855 printk(KERN_WARNING "cciss: read capacity failed\n");
2857 *block_size = BLOCK_SIZE;
2859 printk(KERN_INFO " blocks= %llu block_size= %d\n",
2860 (unsigned long long)*total_size+1, *block_size);
2864 static int cciss_revalidate(struct gendisk *disk)
2866 ctlr_info_t *h = get_host(disk);
2867 drive_info_struct *drv = get_drv(disk);
2870 unsigned int block_size;
2871 sector_t total_size;
2872 InquiryData_struct *inq_buff = NULL;
2874 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2875 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
2876 sizeof(drv->LunID)) == 0) {
2885 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2886 if (inq_buff == NULL) {
2887 printk(KERN_WARNING "cciss: out of memory\n");
2890 if (h->cciss_read == CCISS_READ_10) {
2891 cciss_read_capacity(h->ctlr, logvol,
2892 &total_size, &block_size);
2894 cciss_read_capacity_16(h->ctlr, logvol,
2895 &total_size, &block_size);
2897 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
2900 blk_queue_logical_block_size(drv->queue, drv->block_size);
2901 set_capacity(disk, drv->nr_blocks);
2908 * Map (physical) PCI mem into (virtual) kernel space
2910 static void __iomem *remap_pci_mem(ulong base, ulong size)
2912 ulong page_base = ((ulong) base) & PAGE_MASK;
2913 ulong page_offs = ((ulong) base) - page_base;
2914 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2916 return page_remapped ? (page_remapped + page_offs) : NULL;
2920 * Takes jobs of the Q and sends them to the hardware, then puts it on
2921 * the Q to wait for completion.
2923 static void start_io(ctlr_info_t *h)
2925 CommandList_struct *c;
2927 while (!hlist_empty(&h->reqQ)) {
2928 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
2929 /* can't do anything if fifo is full */
2930 if ((h->access.fifo_full(h))) {
2931 printk(KERN_WARNING "cciss: fifo full\n");
2935 /* Get the first entry from the Request Q */
2939 /* Tell the controller execute command */
2940 h->access.submit_command(h, c);
2942 /* Put job onto the completed Q */
2947 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2948 /* Zeros out the error record and then resends the command back */
2949 /* to the controller */
2950 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
2952 /* erase the old error information */
2953 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2955 /* add it to software queue and then send it to the controller */
2958 if (h->Qdepth > h->maxQsinceinit)
2959 h->maxQsinceinit = h->Qdepth;
2964 static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2965 unsigned int msg_byte, unsigned int host_byte,
2966 unsigned int driver_byte)
2968 /* inverse of macros in scsi.h */
2969 return (scsi_status_byte & 0xff) |
2970 ((msg_byte & 0xff) << 8) |
2971 ((host_byte & 0xff) << 16) |
2972 ((driver_byte & 0xff) << 24);
2975 static inline int evaluate_target_status(ctlr_info_t *h,
2976 CommandList_struct *cmd, int *retry_cmd)
2978 unsigned char sense_key;
2979 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2983 /* If we get in here, it means we got "target status", that is, scsi status */
2984 status_byte = cmd->err_info->ScsiStatus;
2985 driver_byte = DRIVER_OK;
2986 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2988 if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
2989 host_byte = DID_PASSTHROUGH;
2993 error_value = make_status_bytes(status_byte, msg_byte,
2994 host_byte, driver_byte);
2996 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
2997 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
2998 printk(KERN_WARNING "cciss: cmd %p "
2999 "has SCSI Status 0x%x\n",
3000 cmd, cmd->err_info->ScsiStatus);
3004 /* check the sense key */
3005 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3006 /* no status or recovered error */
3007 if (((sense_key == 0x0) || (sense_key == 0x1)) &&
3008 (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
3011 if (check_for_unit_attention(h, cmd)) {
3012 *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
3016 /* Not SG_IO or similar? */
3017 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
3018 if (error_value != 0)
3019 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3020 " sense key = 0x%x\n", cmd, sense_key);
3024 /* SG_IO or similar, copy sense data back */
3025 if (cmd->rq->sense) {
3026 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3027 cmd->rq->sense_len = cmd->err_info->SenseLen;
3028 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3029 cmd->rq->sense_len);
3031 cmd->rq->sense_len = 0;
3036 /* checks the status of the job and calls complete buffers to mark all
3037 * buffers for the completed job. Note that this function does not need
3038 * to hold the hba/queue lock.
3040 static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3044 struct request *rq = cmd->rq;
3049 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
3051 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3052 goto after_error_processing;
3054 switch (cmd->err_info->CommandStatus) {
3055 case CMD_TARGET_STATUS:
3056 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
3058 case CMD_DATA_UNDERRUN:
3059 if (cmd->rq->cmd_type == REQ_TYPE_FS) {
3060 printk(KERN_WARNING "cciss: cmd %p has"
3061 " completed with data underrun "
3063 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
3066 case CMD_DATA_OVERRUN:
3067 if (cmd->rq->cmd_type == REQ_TYPE_FS)
3068 printk(KERN_WARNING "cciss: cmd %p has"
3069 " completed with data overrun "
3073 printk(KERN_WARNING "cciss: cmd %p is "
3074 "reported invalid\n", cmd);
3075 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3076 cmd->err_info->CommandStatus, DRIVER_OK,
3077 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3078 DID_PASSTHROUGH : DID_ERROR);
3080 case CMD_PROTOCOL_ERR:
3081 printk(KERN_WARNING "cciss: cmd %p has "
3082 "protocol error \n", cmd);
3083 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3084 cmd->err_info->CommandStatus, DRIVER_OK,
3085 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3086 DID_PASSTHROUGH : DID_ERROR);
3088 case CMD_HARDWARE_ERR:
3089 printk(KERN_WARNING "cciss: cmd %p had "
3090 " hardware error\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_CONNECTION_LOST:
3097 printk(KERN_WARNING "cciss: cmd %p had "
3098 "connection lost\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);
3105 printk(KERN_WARNING "cciss: cmd %p was "
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_ABORT);
3112 case CMD_ABORT_FAILED:
3113 printk(KERN_WARNING "cciss: cmd %p reports "
3114 "abort failed\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);
3120 case CMD_UNSOLICITED_ABORT:
3121 printk(KERN_WARNING "cciss%d: unsolicited "
3122 "abort %p\n", h->ctlr, cmd);
3123 if (cmd->retry_count < MAX_CMD_RETRIES) {
3126 "cciss%d: retrying %p\n", h->ctlr, cmd);
3130 "cciss%d: %p retried too "
3131 "many times\n", h->ctlr, cmd);
3132 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3133 cmd->err_info->CommandStatus, DRIVER_OK,
3134 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3135 DID_PASSTHROUGH : DID_ABORT);
3138 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
3139 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3140 cmd->err_info->CommandStatus, DRIVER_OK,
3141 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3142 DID_PASSTHROUGH : DID_ERROR);
3145 printk(KERN_WARNING "cciss: cmd %p returned "
3146 "unknown status %x\n", cmd,
3147 cmd->err_info->CommandStatus);
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_ERROR);
3154 after_error_processing:
3156 /* We need to return this command */
3158 resend_cciss_cmd(h, cmd);
3161 cmd->rq->completion_data = cmd;
3162 blk_complete_request(cmd->rq);
3165 static inline u32 cciss_tag_contains_index(u32 tag)
3167 #define DIRECT_LOOKUP_BIT 0x10
3168 return tag & DIRECT_LOOKUP_BIT;
3171 static inline u32 cciss_tag_to_index(u32 tag)
3173 #define DIRECT_LOOKUP_SHIFT 5
3174 return tag >> DIRECT_LOOKUP_SHIFT;
3177 static inline u32 cciss_tag_discard_error_bits(u32 tag)
3179 #define CCISS_ERROR_BITS 0x03
3180 return tag & ~CCISS_ERROR_BITS;
3183 static inline void cciss_mark_tag_indexed(u32 *tag)
3185 *tag |= DIRECT_LOOKUP_BIT;
3188 static inline void cciss_set_tag_index(u32 *tag, u32 index)
3190 *tag |= (index << DIRECT_LOOKUP_SHIFT);
3194 * Get a request and submit it to the controller.
3196 static void do_cciss_request(struct request_queue *q)
3198 ctlr_info_t *h = q->queuedata;
3199 CommandList_struct *c;
3202 struct request *creq;
3204 struct scatterlist *tmp_sg;
3205 SGDescriptor_struct *curr_sg;
3206 drive_info_struct *drv;
3211 /* We call start_io here in case there is a command waiting on the
3212 * queue that has not been sent.
3214 if (blk_queue_plugged(q))
3218 creq = blk_peek_request(q);
3222 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
3224 if ((c = cmd_alloc(h, 1)) == NULL)
3227 blk_start_request(creq);
3229 tmp_sg = h->scatter_list[c->cmdindex];
3230 spin_unlock_irq(q->queue_lock);
3232 c->cmd_type = CMD_RWREQ;
3235 /* fill in the request */
3236 drv = creq->rq_disk->private_data;
3237 c->Header.ReplyQueue = 0; /* unused in simple mode */
3238 /* got command from pool, so use the command block index instead */
3239 /* for direct lookups. */
3240 /* The first 2 bits are reserved for controller error reporting. */
3241 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
3242 cciss_mark_tag_indexed(&c->Header.Tag.lower);
3243 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
3244 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3245 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
3246 c->Request.Type.Attribute = ATTR_SIMPLE;
3247 c->Request.Type.Direction =
3248 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
3249 c->Request.Timeout = 0; /* Don't time out */
3251 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
3252 start_blk = blk_rq_pos(creq);
3254 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3255 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
3256 #endif /* CCISS_DEBUG */
3258 sg_init_table(tmp_sg, h->maxsgentries);
3259 seg = blk_rq_map_sg(q, creq, tmp_sg);
3261 /* get the DMA records for the setup */
3262 if (c->Request.Type.Direction == XFER_READ)
3263 dir = PCI_DMA_FROMDEVICE;
3265 dir = PCI_DMA_TODEVICE;
3271 for (i = 0; i < seg; i++) {
3272 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3273 !chained && ((seg - i) > 1)) {
3274 /* Point to next chain block. */
3275 curr_sg = h->cmd_sg_list[c->cmdindex];
3279 curr_sg[sg_index].Len = tmp_sg[i].length;
3280 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
3282 tmp_sg[i].length, dir);
3283 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3284 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3285 curr_sg[sg_index].Ext = 0; /* we are not chaining */
3289 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3290 (seg - (h->max_cmd_sgentries - 1)) *
3291 sizeof(SGDescriptor_struct));
3293 /* track how many SG entries we are using */
3298 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3300 blk_rq_sectors(creq), seg, chained);
3301 #endif /* CCISS_DEBUG */
3303 c->Header.SGTotal = seg + chained;
3304 if (seg <= h->max_cmd_sgentries)
3305 c->Header.SGList = c->Header.SGTotal;
3307 c->Header.SGList = h->max_cmd_sgentries;
3308 set_performant_mode(h, c);
3310 if (likely(creq->cmd_type == REQ_TYPE_FS)) {
3311 if(h->cciss_read == CCISS_READ_10) {
3312 c->Request.CDB[1] = 0;
3313 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
3314 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3315 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3316 c->Request.CDB[5] = start_blk & 0xff;
3317 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
3318 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3319 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
3320 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3322 u32 upper32 = upper_32_bits(start_blk);
3324 c->Request.CDBLen = 16;
3325 c->Request.CDB[1]= 0;
3326 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
3327 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3328 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3329 c->Request.CDB[5]= upper32 & 0xff;
3330 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3331 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3332 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3333 c->Request.CDB[9]= start_blk & 0xff;
3334 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3335 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3336 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3337 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
3338 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3340 } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
3341 c->Request.CDBLen = creq->cmd_len;
3342 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
3344 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3348 spin_lock_irq(q->queue_lock);
3352 if (h->Qdepth > h->maxQsinceinit)
3353 h->maxQsinceinit = h->Qdepth;
3359 /* We will already have the driver lock here so not need
3365 static inline unsigned long get_next_completion(ctlr_info_t *h)
3367 return h->access.command_completed(h);
3370 static inline int interrupt_pending(ctlr_info_t *h)
3372 return h->access.intr_pending(h);
3375 static inline long interrupt_not_for_us(ctlr_info_t *h)
3377 return !(h->msi_vector || h->msix_vector) &&
3378 ((h->access.intr_pending(h) == 0) ||
3379 (h->interrupts_enabled == 0));
3382 static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
3385 if (unlikely(tag_index >= h->nr_cmds)) {
3386 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3392 static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
3396 if (likely(c->cmd_type == CMD_RWREQ))
3397 complete_command(h, c, 0);
3398 else if (c->cmd_type == CMD_IOCTL_PEND)
3399 complete(c->waiting);
3400 #ifdef CONFIG_CISS_SCSI_TAPE
3401 else if (c->cmd_type == CMD_SCSI)
3402 complete_scsi_command(c, 0, raw_tag);
3406 static inline u32 next_command(ctlr_info_t *h)
3410 if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
3411 return h->access.command_completed(h);
3413 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
3414 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
3415 (h->reply_pool_head)++;
3416 h->commands_outstanding--;
3420 /* Check for wraparound */
3421 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
3422 h->reply_pool_head = h->reply_pool;
3423 h->reply_pool_wraparound ^= 1;
3428 /* process completion of an indexed ("direct lookup") command */
3429 static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
3432 CommandList_struct *c;
3434 tag_index = cciss_tag_to_index(raw_tag);
3435 if (bad_tag(h, tag_index, raw_tag))
3436 return next_command(h);
3437 c = h->cmd_pool + tag_index;
3438 finish_cmd(h, c, raw_tag);
3439 return next_command(h);
3442 /* process completion of a non-indexed command */
3443 static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
3446 CommandList_struct *c = NULL;
3447 struct hlist_node *tmp;
3448 __u32 busaddr_masked, tag_masked;
3450 tag = cciss_tag_discard_error_bits(raw_tag);
3451 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3452 busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
3453 tag_masked = cciss_tag_discard_error_bits(tag);
3454 if (busaddr_masked == tag_masked) {
3455 finish_cmd(h, c, raw_tag);
3456 return next_command(h);
3459 bad_tag(h, h->nr_cmds + 1, raw_tag);
3460 return next_command(h);
3463 static irqreturn_t do_cciss_intx(int irq, void *dev_id)
3465 ctlr_info_t *h = dev_id;
3466 unsigned long flags;
3469 if (interrupt_not_for_us(h))
3472 * If there are completed commands in the completion queue,
3473 * we had better do something about it.
3475 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3476 while (interrupt_pending(h)) {
3477 raw_tag = get_next_completion(h);
3478 while (raw_tag != FIFO_EMPTY) {
3479 if (cciss_tag_contains_index(raw_tag))
3480 raw_tag = process_indexed_cmd(h, raw_tag);
3482 raw_tag = process_nonindexed_cmd(h, raw_tag);
3486 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3490 /* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
3491 * check the interrupt pending register because it is not set.
3493 static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
3495 ctlr_info_t *h = dev_id;
3496 unsigned long flags;
3499 if (interrupt_not_for_us(h))
3502 * If there are completed commands in the completion queue,
3503 * we had better do something about it.
3505 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3506 raw_tag = get_next_completion(h);
3507 while (raw_tag != FIFO_EMPTY) {
3508 if (cciss_tag_contains_index(raw_tag))
3509 raw_tag = process_indexed_cmd(h, raw_tag);
3511 raw_tag = process_nonindexed_cmd(h, raw_tag);
3514 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3519 * add_to_scan_list() - add controller to rescan queue
3520 * @h: Pointer to the controller.
3522 * Adds the controller to the rescan queue if not already on the queue.
3524 * returns 1 if added to the queue, 0 if skipped (could be on the
3525 * queue already, or the controller could be initializing or shutting
3528 static int add_to_scan_list(struct ctlr_info *h)
3530 struct ctlr_info *test_h;
3534 if (h->busy_initializing)
3537 if (!mutex_trylock(&h->busy_shutting_down))
3540 mutex_lock(&scan_mutex);
3541 list_for_each_entry(test_h, &scan_q, scan_list) {
3547 if (!found && !h->busy_scanning) {
3548 INIT_COMPLETION(h->scan_wait);
3549 list_add_tail(&h->scan_list, &scan_q);
3552 mutex_unlock(&scan_mutex);
3553 mutex_unlock(&h->busy_shutting_down);
3559 * remove_from_scan_list() - remove controller from rescan queue
3560 * @h: Pointer to the controller.
3562 * Removes the controller from the rescan queue if present. Blocks if
3563 * the controller is currently conducting a rescan. The controller
3564 * can be in one of three states:
3565 * 1. Doesn't need a scan
3566 * 2. On the scan list, but not scanning yet (we remove it)
3567 * 3. Busy scanning (and not on the list). In this case we want to wait for
3568 * the scan to complete to make sure the scanning thread for this
3569 * controller is completely idle.
3571 static void remove_from_scan_list(struct ctlr_info *h)
3573 struct ctlr_info *test_h, *tmp_h;
3575 mutex_lock(&scan_mutex);
3576 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3577 if (test_h == h) { /* state 2. */
3578 list_del(&h->scan_list);
3579 complete_all(&h->scan_wait);
3580 mutex_unlock(&scan_mutex);
3584 if (h->busy_scanning) { /* state 3. */
3585 mutex_unlock(&scan_mutex);
3586 wait_for_completion(&h->scan_wait);
3587 } else { /* state 1, nothing to do. */
3588 mutex_unlock(&scan_mutex);
3593 * scan_thread() - kernel thread used to rescan controllers
3596 * A kernel thread used scan for drive topology changes on
3597 * controllers. The thread processes only one controller at a time
3598 * using a queue. Controllers are added to the queue using
3599 * add_to_scan_list() and removed from the queue either after done
3600 * processing or using remove_from_scan_list().
3604 static int scan_thread(void *data)
3606 struct ctlr_info *h;
3609 set_current_state(TASK_INTERRUPTIBLE);
3611 if (kthread_should_stop())
3615 mutex_lock(&scan_mutex);
3616 if (list_empty(&scan_q)) {
3617 mutex_unlock(&scan_mutex);
3621 h = list_entry(scan_q.next,
3624 list_del(&h->scan_list);
3625 h->busy_scanning = 1;
3626 mutex_unlock(&scan_mutex);
3628 rebuild_lun_table(h, 0, 0);
3629 complete_all(&h->scan_wait);
3630 mutex_lock(&scan_mutex);
3631 h->busy_scanning = 0;
3632 mutex_unlock(&scan_mutex);
3639 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3641 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3644 switch (c->err_info->SenseInfo[12]) {
3646 printk(KERN_WARNING "cciss%d: a state change "
3647 "detected, command retried\n", h->ctlr);
3651 printk(KERN_WARNING "cciss%d: LUN failure "
3652 "detected, action required\n", h->ctlr);
3655 case REPORT_LUNS_CHANGED:
3656 printk(KERN_WARNING "cciss%d: report LUN data "
3657 "changed\n", h->ctlr);
3659 * Here, we could call add_to_scan_list and wake up the scan thread,
3660 * except that it's quite likely that we will get more than one
3661 * REPORT_LUNS_CHANGED condition in quick succession, which means
3662 * that those which occur after the first one will likely happen
3663 * *during* the scan_thread's rescan. And the rescan code is not
3664 * robust enough to restart in the middle, undoing what it has already
3665 * done, and it's not clear that it's even possible to do this, since
3666 * part of what it does is notify the block layer, which starts
3667 * doing it's own i/o to read partition tables and so on, and the
3668 * driver doesn't have visibility to know what might need undoing.
3669 * In any event, if possible, it is horribly complicated to get right
3670 * so we just don't do it for now.
3672 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3676 case POWER_OR_RESET:
3677 printk(KERN_WARNING "cciss%d: a power on "
3678 "or device reset detected\n", h->ctlr);
3681 case UNIT_ATTENTION_CLEARED:
3682 printk(KERN_WARNING "cciss%d: unit attention "
3683 "cleared by another initiator\n", h->ctlr);
3687 printk(KERN_WARNING "cciss%d: unknown "
3688 "unit attention detected\n", h->ctlr);
3694 * We cannot read the structure directly, for portability we must use
3696 * This is for debug only.
3699 static void print_cfg_table(CfgTable_struct *tb)
3704 printk("Controller Configuration information\n");
3705 printk("------------------------------------\n");
3706 for (i = 0; i < 4; i++)
3707 temp_name[i] = readb(&(tb->Signature[i]));
3708 temp_name[4] = '\0';
3709 printk(" Signature = %s\n", temp_name);
3710 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
3711 printk(" Transport methods supported = 0x%x\n",
3712 readl(&(tb->TransportSupport)));
3713 printk(" Transport methods active = 0x%x\n",
3714 readl(&(tb->TransportActive)));
3715 printk(" Requested transport Method = 0x%x\n",
3716 readl(&(tb->HostWrite.TransportRequest)));
3717 printk(" Coalesce Interrupt Delay = 0x%x\n",
3718 readl(&(tb->HostWrite.CoalIntDelay)));
3719 printk(" Coalesce Interrupt Count = 0x%x\n",
3720 readl(&(tb->HostWrite.CoalIntCount)));
3721 printk(" Max outstanding commands = 0x%d\n",
3722 readl(&(tb->CmdsOutMax)));
3723 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3724 for (i = 0; i < 16; i++)
3725 temp_name[i] = readb(&(tb->ServerName[i]));
3726 temp_name[16] = '\0';
3727 printk(" Server Name = %s\n", temp_name);
3728 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
3730 #endif /* CCISS_DEBUG */
3732 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3734 int i, offset, mem_type, bar_type;
3735 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3738 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3739 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3740 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3743 mem_type = pci_resource_flags(pdev, i) &
3744 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3746 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3747 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3748 offset += 4; /* 32 bit */
3750 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3753 default: /* reserved in PCI 2.2 */
3755 "Base address is invalid\n");
3760 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3766 /* Fill in bucket_map[], given nsgs (the max number of
3767 * scatter gather elements supported) and bucket[],
3768 * which is an array of 8 integers. The bucket[] array
3769 * contains 8 different DMA transfer sizes (in 16
3770 * byte increments) which the controller uses to fetch
3771 * commands. This function fills in bucket_map[], which
3772 * maps a given number of scatter gather elements to one of
3773 * the 8 DMA transfer sizes. The point of it is to allow the
3774 * controller to only do as much DMA as needed to fetch the
3775 * command, with the DMA transfer size encoded in the lower
3776 * bits of the command address.
3778 static void calc_bucket_map(int bucket[], int num_buckets,
3779 int nsgs, int *bucket_map)
3783 /* even a command with 0 SGs requires 4 blocks */
3784 #define MINIMUM_TRANSFER_BLOCKS 4
3785 #define NUM_BUCKETS 8
3786 /* Note, bucket_map must have nsgs+1 entries. */
3787 for (i = 0; i <= nsgs; i++) {
3788 /* Compute size of a command with i SG entries */
3789 size = i + MINIMUM_TRANSFER_BLOCKS;
3790 b = num_buckets; /* Assume the biggest bucket */
3791 /* Find the bucket that is just big enough */
3792 for (j = 0; j < 8; j++) {
3793 if (bucket[j] >= size) {
3798 /* for a command with i SG entries, use bucket b. */
3804 cciss_put_controller_into_performant_mode(ctlr_info_t *h)
3807 __u32 trans_support;
3810 * 5 = 1 s/g entry or 4k
3811 * 6 = 2 s/g entry or 8k
3812 * 8 = 4 s/g entry or 16k
3813 * 10 = 6 s/g entry or 24k
3815 int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
3816 unsigned long register_value;
3818 BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
3820 /* Attempt to put controller into performant mode if supported */
3821 /* Does board support performant mode? */
3822 trans_support = readl(&(h->cfgtable->TransportSupport));
3823 if (!(trans_support & PERFORMANT_MODE))
3826 printk(KERN_WARNING "cciss%d: Placing controller into "
3827 "performant mode\n", h->ctlr);
3828 /* Performant mode demands commands on a 32 byte boundary
3829 * pci_alloc_consistent aligns on page boundarys already.
3830 * Just need to check if divisible by 32
3832 if ((sizeof(CommandList_struct) % 32) != 0) {
3833 printk(KERN_WARNING "%s %d %s\n",
3834 "cciss info: command size[",
3835 (int)sizeof(CommandList_struct),
3836 "] not divisible by 32, no performant mode..\n");
3840 /* Performant mode ring buffer and supporting data structures */
3841 h->reply_pool = (__u64 *)pci_alloc_consistent(
3842 h->pdev, h->max_commands * sizeof(__u64),
3843 &(h->reply_pool_dhandle));
3845 /* Need a block fetch table for performant mode */
3846 h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
3847 sizeof(__u32)), GFP_KERNEL);
3849 if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
3852 h->reply_pool_wraparound = 1; /* spec: init to 1 */
3854 /* Controller spec: zero out this buffer. */
3855 memset(h->reply_pool, 0, h->max_commands * sizeof(__u64));
3856 h->reply_pool_head = h->reply_pool;
3858 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3859 calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries,
3860 h->blockFetchTable);
3861 writel(bft[0], &h->transtable->BlockFetch0);
3862 writel(bft[1], &h->transtable->BlockFetch1);
3863 writel(bft[2], &h->transtable->BlockFetch2);
3864 writel(bft[3], &h->transtable->BlockFetch3);
3865 writel(bft[4], &h->transtable->BlockFetch4);
3866 writel(bft[5], &h->transtable->BlockFetch5);
3867 writel(bft[6], &h->transtable->BlockFetch6);
3868 writel(bft[7], &h->transtable->BlockFetch7);
3870 /* size of controller ring buffer */
3871 writel(h->max_commands, &h->transtable->RepQSize);
3872 writel(1, &h->transtable->RepQCount);
3873 writel(0, &h->transtable->RepQCtrAddrLow32);
3874 writel(0, &h->transtable->RepQCtrAddrHigh32);
3875 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3876 writel(0, &h->transtable->RepQAddr0High32);
3877 writel(CFGTBL_Trans_Performant,
3878 &(h->cfgtable->HostWrite.TransportRequest));
3880 h->transMethod = CFGTBL_Trans_Performant;
3881 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3882 /* under certain very rare conditions, this can take awhile.
3883 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3884 * as we enter this code.) */
3885 for (l = 0; l < MAX_CONFIG_WAIT; l++) {
3886 register_value = readl(h->vaddr + SA5_DOORBELL);
3887 if (!(register_value & CFGTBL_ChangeReq))
3889 /* delay and try again */
3890 set_current_state(TASK_INTERRUPTIBLE);
3891 schedule_timeout(10);
3893 register_value = readl(&(h->cfgtable->TransportActive));
3894 if (!(register_value & CFGTBL_Trans_Performant)) {
3895 printk(KERN_WARNING "cciss: unable to get board into"
3896 " performant mode\n");
3900 /* Change the access methods to the performant access methods */
3901 h->access = SA5_performant_access;
3905 kfree(h->blockFetchTable);
3907 pci_free_consistent(h->pdev,
3908 h->max_commands * sizeof(__u64),
3910 h->reply_pool_dhandle);
3913 } /* cciss_put_controller_into_performant_mode */
3915 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3916 * controllers that are capable. If not, we use IO-APIC mode.
3919 static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3920 struct pci_dev *pdev, __u32 board_id)
3922 #ifdef CONFIG_PCI_MSI
3924 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3928 /* Some boards advertise MSI but don't really support it */
3929 if ((board_id == 0x40700E11) ||
3930 (board_id == 0x40800E11) ||
3931 (board_id == 0x40820E11) || (board_id == 0x40830E11))
3932 goto default_int_mode;
3934 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3935 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3937 c->intr[0] = cciss_msix_entries[0].vector;
3938 c->intr[1] = cciss_msix_entries[1].vector;
3939 c->intr[2] = cciss_msix_entries[2].vector;
3940 c->intr[3] = cciss_msix_entries[3].vector;
3945 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3946 "available\n", err);
3947 goto default_int_mode;
3949 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3951 goto default_int_mode;
3954 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3955 if (!pci_enable_msi(pdev)) {
3958 printk(KERN_WARNING "cciss: MSI init failed\n");
3962 #endif /* CONFIG_PCI_MSI */
3963 /* if we get here we're going to use the default interrupt mode */
3964 c->intr[PERF_MODE_INT] = pdev->irq;
3968 static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
3970 ushort subsystem_vendor_id, subsystem_device_id, command;
3971 __u32 board_id, scratchpad = 0;
3973 __u32 cfg_base_addr;
3974 __u64 cfg_base_addr_index;
3975 int i, prod_index, err;
3978 subsystem_vendor_id = pdev->subsystem_vendor;
3979 subsystem_device_id = pdev->subsystem_device;
3980 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3981 subsystem_vendor_id);
3983 for (i = 0; i < ARRAY_SIZE(products); i++) {
3984 /* Stand aside for hpsa driver on request */
3985 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3987 if (board_id == products[i].board_id)
3991 if (prod_index == ARRAY_SIZE(products)) {
3992 dev_warn(&pdev->dev,
3993 "unrecognized board ID: 0x%08lx, ignoring.\n",
3994 (unsigned long) board_id);
3998 /* check to see if controller has been disabled */
3999 /* BEFORE trying to enable it */
4000 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
4001 if (!(command & 0x02)) {
4003 "cciss: controller appears to be disabled\n");
4007 err = pci_enable_device(pdev);
4009 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
4013 err = pci_request_regions(pdev, "cciss");
4015 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
4021 printk("command = %x\n", command);
4022 printk("irq = %x\n", pdev->irq);
4023 printk("board_id = %x\n", board_id);
4024 #endif /* CCISS_DEBUG */
4026 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
4027 * else we use the IO-APIC interrupt assigned to us by system ROM.
4029 cciss_interrupt_mode(c, pdev, board_id);
4031 /* find the memory BAR */
4032 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
4033 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
4036 if (i == DEVICE_COUNT_RESOURCE) {
4037 printk(KERN_WARNING "cciss: No memory BAR found\n");
4039 goto err_out_free_res;
4042 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
4047 printk("address 0 = %lx\n", c->paddr);
4048 #endif /* CCISS_DEBUG */
4049 c->vaddr = remap_pci_mem(c->paddr, 0x250);
4051 /* Wait for the board to become ready. (PCI hotplug needs this.)
4052 * We poll for up to 120 secs, once per 100ms. */
4053 for (i = 0; i < 1200; i++) {
4054 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
4055 if (scratchpad == CCISS_FIRMWARE_READY)
4057 set_current_state(TASK_INTERRUPTIBLE);
4058 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
4060 if (scratchpad != CCISS_FIRMWARE_READY) {
4061 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
4063 goto err_out_free_res;
4066 /* get the address index number */
4067 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
4068 cfg_base_addr &= (__u32) 0x0000ffff;
4070 printk("cfg base address = %x\n", cfg_base_addr);
4071 #endif /* CCISS_DEBUG */
4072 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
4074 printk("cfg base address index = %llx\n",
4075 (unsigned long long)cfg_base_addr_index);
4076 #endif /* CCISS_DEBUG */
4077 if (cfg_base_addr_index == -1) {
4078 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
4080 goto err_out_free_res;
4083 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
4085 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
4086 #endif /* CCISS_DEBUG */
4087 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
4088 cfg_base_addr_index) +
4089 cfg_offset, sizeof(CfgTable_struct));
4090 /* Find performant mode table. */
4091 trans_offset = readl(&(c->cfgtable->TransMethodOffset));
4092 c->transtable = remap_pci_mem(pci_resource_start(pdev,
4093 cfg_base_addr_index) + cfg_offset+trans_offset,
4094 sizeof(*c->transtable));
4095 c->board_id = board_id;
4098 print_cfg_table(c->cfgtable);
4099 #endif /* CCISS_DEBUG */
4101 /* Some controllers support Zero Memory Raid (ZMR).
4102 * When configured in ZMR mode the number of supported
4103 * commands drops to 64. So instead of just setting an
4104 * arbitrary value we make the driver a little smarter.
4105 * We read the config table to tell us how many commands
4106 * are supported on the controller then subtract 4 to
4107 * leave a little room for ioctl calls.
4109 c->max_commands = readl(&(c->cfgtable->MaxPerformantModeCommands));
4110 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
4113 * Limit native command to 32 s/g elements to save dma'able memory.
4114 * Howvever spec says if 0, use 31
4117 c->max_cmd_sgentries = 31;
4118 if (c->maxsgentries > 512) {
4119 c->max_cmd_sgentries = 32;
4120 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
4121 c->maxsgentries -= 1; /* account for chain pointer */
4123 c->maxsgentries = 31; /* Default to traditional value */
4124 c->chainsize = 0; /* traditional */
4127 c->product_name = products[prod_index].product_name;
4128 c->access = *(products[prod_index].access);
4129 c->nr_cmds = c->max_commands - 4;
4130 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
4131 (readb(&c->cfgtable->Signature[1]) != 'I') ||
4132 (readb(&c->cfgtable->Signature[2]) != 'S') ||
4133 (readb(&c->cfgtable->Signature[3]) != 'S')) {
4134 printk("Does not appear to be a valid CISS config table\n");
4136 goto err_out_free_res;
4140 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
4142 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
4144 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
4148 /* Disabling DMA prefetch and refetch for the P600.
4149 * An ASIC bug may result in accesses to invalid memory addresses.
4150 * We've disabled prefetch for some time now. Testing with XEN
4151 * kernels revealed a bug in the refetch if dom0 resides on a P600.
4153 if(board_id == 0x3225103C) {
4156 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
4157 dma_prefetch |= 0x8000;
4158 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
4159 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
4161 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
4165 printk(KERN_WARNING "Trying to put board into Performant mode\n");
4166 #endif /* CCISS_DEBUG */
4167 cciss_put_controller_into_performant_mode(c);
4172 * Deliberately omit pci_disable_device(): it does something nasty to
4173 * Smart Array controllers that pci_enable_device does not undo
4175 pci_release_regions(pdev);
4179 /* Function to find the first free pointer into our hba[] array
4180 * Returns -1 if no free entries are left.
4182 static int alloc_cciss_hba(void)
4186 for (i = 0; i < MAX_CTLR; i++) {
4190 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
4197 printk(KERN_WARNING "cciss: This driver supports a maximum"
4198 " of %d controllers.\n", MAX_CTLR);
4201 printk(KERN_ERR "cciss: out of memory.\n");
4205 static void free_hba(int n)
4207 ctlr_info_t *h = hba[n];
4211 for (i = 0; i < h->highest_lun + 1; i++)
4212 if (h->gendisk[i] != NULL)
4213 put_disk(h->gendisk[i]);
4217 /* Send a message CDB to the firmware. */
4218 static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
4221 CommandListHeader_struct CommandHeader;
4222 RequestBlock_struct Request;
4223 ErrDescriptor_struct ErrorDescriptor;
4225 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4228 uint32_t paddr32, tag;
4229 void __iomem *vaddr;
4232 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4236 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4237 CCISS commands, so they must be allocated from the lower 4GiB of
4239 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4245 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4251 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4252 although there's no guarantee, we assume that the address is at
4253 least 4-byte aligned (most likely, it's page-aligned). */
4256 cmd->CommandHeader.ReplyQueue = 0;
4257 cmd->CommandHeader.SGList = 0;
4258 cmd->CommandHeader.SGTotal = 0;
4259 cmd->CommandHeader.Tag.lower = paddr32;
4260 cmd->CommandHeader.Tag.upper = 0;
4261 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4263 cmd->Request.CDBLen = 16;
4264 cmd->Request.Type.Type = TYPE_MSG;
4265 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4266 cmd->Request.Type.Direction = XFER_NONE;
4267 cmd->Request.Timeout = 0; /* Don't time out */
4268 cmd->Request.CDB[0] = opcode;
4269 cmd->Request.CDB[1] = type;
4270 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4272 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4273 cmd->ErrorDescriptor.Addr.upper = 0;
4274 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4276 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4278 for (i = 0; i < 10; i++) {
4279 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4280 if ((tag & ~3) == paddr32)
4282 schedule_timeout_uninterruptible(HZ);
4287 /* we leak the DMA buffer here ... no choice since the controller could
4288 still complete the command. */
4290 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4295 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4298 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4303 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4308 #define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4309 #define cciss_noop(p) cciss_message(p, 3, 0)
4311 static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4313 /* the #defines are stolen from drivers/pci/msi.h. */
4314 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4315 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4320 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4322 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4323 if (control & PCI_MSI_FLAGS_ENABLE) {
4324 printk(KERN_INFO "cciss: resetting MSI\n");
4325 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4329 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4331 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4332 if (control & PCI_MSIX_FLAGS_ENABLE) {
4333 printk(KERN_INFO "cciss: resetting MSI-X\n");
4334 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4341 /* This does a hard reset of the controller using PCI power management
4343 static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4345 u16 pmcsr, saved_config_space[32];
4348 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4350 /* This is very nearly the same thing as
4352 pci_save_state(pci_dev);
4353 pci_set_power_state(pci_dev, PCI_D3hot);
4354 pci_set_power_state(pci_dev, PCI_D0);
4355 pci_restore_state(pci_dev);
4357 but we can't use these nice canned kernel routines on
4358 kexec, because they also check the MSI/MSI-X state in PCI
4359 configuration space and do the wrong thing when it is
4360 set/cleared. Also, the pci_save/restore_state functions
4361 violate the ordering requirements for restoring the
4362 configuration space from the CCISS document (see the
4363 comment below). So we roll our own .... */
4365 for (i = 0; i < 32; i++)
4366 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4368 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4370 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4374 /* Quoting from the Open CISS Specification: "The Power
4375 * Management Control/Status Register (CSR) controls the power
4376 * state of the device. The normal operating state is D0,
4377 * CSR=00h. The software off state is D3, CSR=03h. To reset
4378 * the controller, place the interface device in D3 then to
4379 * D0, this causes a secondary PCI reset which will reset the
4382 /* enter the D3hot power management state */
4383 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4384 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4386 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4388 schedule_timeout_uninterruptible(HZ >> 1);
4390 /* enter the D0 power management state */
4391 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4393 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4395 schedule_timeout_uninterruptible(HZ >> 1);
4397 /* Restore the PCI configuration space. The Open CISS
4398 * Specification says, "Restore the PCI Configuration
4399 * Registers, offsets 00h through 60h. It is important to
4400 * restore the command register, 16-bits at offset 04h,
4401 * last. Do not restore the configuration status register,
4402 * 16-bits at offset 06h." Note that the offset is 2*i. */
4403 for (i = 0; i < 32; i++) {
4404 if (i == 2 || i == 3)
4406 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4409 pci_write_config_word(pdev, 4, saved_config_space[2]);
4415 * This is it. Find all the controllers and register them. I really hate
4416 * stealing all these major device numbers.
4417 * returns the number of block devices registered.
4419 static int __devinit cciss_init_one(struct pci_dev *pdev,
4420 const struct pci_device_id *ent)
4426 int dac, return_code;
4427 InquiryData_struct *inq_buff;
4429 if (reset_devices) {
4430 /* Reset the controller with a PCI power-cycle */
4431 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4434 /* Now try to get the controller to respond to a no-op. Some
4435 devices (notably the HP Smart Array 5i Controller) need
4436 up to 30 seconds to respond. */
4437 for (i=0; i<30; i++) {
4438 if (cciss_noop(pdev) == 0)
4441 schedule_timeout_uninterruptible(HZ);
4444 printk(KERN_ERR "cciss: controller seems dead\n");
4449 i = alloc_cciss_hba();
4452 hba[i]->busy_initializing = 1;
4453 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4454 INIT_HLIST_HEAD(&hba[i]->reqQ);
4455 mutex_init(&hba[i]->busy_shutting_down);
4457 if (cciss_pci_init(hba[i], pdev) != 0)
4458 goto clean_no_release_regions;
4460 sprintf(hba[i]->devname, "cciss%d", i);
4462 hba[i]->pdev = pdev;
4464 init_completion(&hba[i]->scan_wait);
4466 if (cciss_create_hba_sysfs_entry(hba[i]))
4469 /* configure PCI DMA stuff */
4470 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
4472 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
4475 printk(KERN_ERR "cciss: no suitable DMA available\n");
4480 * register with the major number, or get a dynamic major number
4481 * by passing 0 as argument. This is done for greater than
4482 * 8 controller support.
4484 if (i < MAX_CTLR_ORIG)
4485 hba[i]->major = COMPAQ_CISS_MAJOR + i;
4486 rc = register_blkdev(hba[i]->major, hba[i]->devname);
4487 if (rc == -EBUSY || rc == -EINVAL) {
4489 "cciss: Unable to get major number %d for %s "
4490 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
4493 if (i >= MAX_CTLR_ORIG)
4497 /* make sure the board interrupts are off */
4498 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
4499 if (hba[i]->msi_vector || hba[i]->msix_vector) {
4500 if (request_irq(hba[i]->intr[PERF_MODE_INT],
4502 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4503 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
4504 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
4508 if (request_irq(hba[i]->intr[PERF_MODE_INT], do_cciss_intx,
4509 IRQF_DISABLED, hba[i]->devname, hba[i])) {
4510 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
4511 hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
4516 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
4517 hba[i]->devname, pdev->device, pci_name(pdev),
4518 hba[i]->intr[PERF_MODE_INT], dac ? "" : " not");
4520 hba[i]->cmd_pool_bits =
4521 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4522 * sizeof(unsigned long), GFP_KERNEL);
4523 hba[i]->cmd_pool = (CommandList_struct *)
4524 pci_alloc_consistent(hba[i]->pdev,
4525 hba[i]->nr_cmds * sizeof(CommandList_struct),
4526 &(hba[i]->cmd_pool_dhandle));
4527 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4528 pci_alloc_consistent(hba[i]->pdev,
4529 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4530 &(hba[i]->errinfo_pool_dhandle));
4531 if ((hba[i]->cmd_pool_bits == NULL)
4532 || (hba[i]->cmd_pool == NULL)
4533 || (hba[i]->errinfo_pool == NULL)) {
4534 printk(KERN_ERR "cciss: out of memory");
4538 /* Need space for temp scatter list */
4539 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4540 sizeof(struct scatterlist *),
4542 for (k = 0; k < hba[i]->nr_cmds; k++) {
4543 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4544 hba[i]->maxsgentries,
4546 if (hba[i]->scatter_list[k] == NULL) {
4547 printk(KERN_ERR "cciss%d: could not allocate "
4552 hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i],
4553 hba[i]->chainsize, hba[i]->nr_cmds);
4554 if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0)
4557 spin_lock_init(&hba[i]->lock);
4559 /* Initialize the pdev driver private data.
4560 have it point to hba[i]. */
4561 pci_set_drvdata(pdev, hba[i]);
4562 /* command and error info recs zeroed out before
4564 memset(hba[i]->cmd_pool_bits, 0,
4565 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4566 * sizeof(unsigned long));
4568 hba[i]->num_luns = 0;
4569 hba[i]->highest_lun = -1;
4570 for (j = 0; j < CISS_MAX_LUN; j++) {
4571 hba[i]->drv[j] = NULL;
4572 hba[i]->gendisk[j] = NULL;
4575 cciss_scsi_setup(i);
4577 /* Turn the interrupts on so we can service requests */
4578 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4580 /* Get the firmware version */
4581 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4582 if (inq_buff == NULL) {
4583 printk(KERN_ERR "cciss: out of memory\n");
4587 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
4588 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
4589 if (return_code == IO_OK) {
4590 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4591 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4592 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4593 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4594 } else { /* send command failed */
4595 printk(KERN_WARNING "cciss: unable to determine firmware"
4596 " version of controller\n");
4602 hba[i]->cciss_max_sectors = 8192;
4604 rebuild_lun_table(hba[i], 1, 0);
4605 hba[i]->busy_initializing = 0;
4609 kfree(hba[i]->cmd_pool_bits);
4610 /* Free up sg elements */
4611 for (k = 0; k < hba[i]->nr_cmds; k++)
4612 kfree(hba[i]->scatter_list[k]);
4613 kfree(hba[i]->scatter_list);
4614 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
4615 if (hba[i]->cmd_pool)
4616 pci_free_consistent(hba[i]->pdev,
4617 hba[i]->nr_cmds * sizeof(CommandList_struct),
4618 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4619 if (hba[i]->errinfo_pool)
4620 pci_free_consistent(hba[i]->pdev,
4621 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4622 hba[i]->errinfo_pool,
4623 hba[i]->errinfo_pool_dhandle);
4624 free_irq(hba[i]->intr[PERF_MODE_INT], hba[i]);
4626 unregister_blkdev(hba[i]->major, hba[i]->devname);
4628 cciss_destroy_hba_sysfs_entry(hba[i]);
4630 pci_release_regions(pdev);
4631 clean_no_release_regions:
4632 hba[i]->busy_initializing = 0;
4635 * Deliberately omit pci_disable_device(): it does something nasty to
4636 * Smart Array controllers that pci_enable_device does not undo
4638 pci_set_drvdata(pdev, NULL);
4643 static void cciss_shutdown(struct pci_dev *pdev)
4649 h = pci_get_drvdata(pdev);
4650 flush_buf = kzalloc(4, GFP_KERNEL);
4653 "cciss:%d cache not flushed, out of memory.\n",
4657 /* write all data in the battery backed cache to disk */
4658 memset(flush_buf, 0, 4);
4659 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4660 4, 0, CTLR_LUNID, TYPE_CMD);
4662 if (return_code != IO_OK)
4663 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4665 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4666 free_irq(h->intr[PERF_MODE_INT], h);
4669 static void __devexit cciss_remove_one(struct pci_dev *pdev)
4671 ctlr_info_t *tmp_ptr;
4674 if (pci_get_drvdata(pdev) == NULL) {
4675 printk(KERN_ERR "cciss: Unable to remove device \n");
4679 tmp_ptr = pci_get_drvdata(pdev);
4681 if (hba[i] == NULL) {
4682 printk(KERN_ERR "cciss: device appears to "
4683 "already be removed \n");
4687 mutex_lock(&hba[i]->busy_shutting_down);
4689 remove_from_scan_list(hba[i]);
4690 remove_proc_entry(hba[i]->devname, proc_cciss);
4691 unregister_blkdev(hba[i]->major, hba[i]->devname);
4693 /* remove it from the disk list */
4694 for (j = 0; j < CISS_MAX_LUN; j++) {
4695 struct gendisk *disk = hba[i]->gendisk[j];
4697 struct request_queue *q = disk->queue;
4699 if (disk->flags & GENHD_FL_UP) {
4700 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
4704 blk_cleanup_queue(q);
4708 #ifdef CONFIG_CISS_SCSI_TAPE
4709 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
4712 cciss_shutdown(pdev);
4714 #ifdef CONFIG_PCI_MSI
4715 if (hba[i]->msix_vector)
4716 pci_disable_msix(hba[i]->pdev);
4717 else if (hba[i]->msi_vector)
4718 pci_disable_msi(hba[i]->pdev);
4719 #endif /* CONFIG_PCI_MSI */
4721 iounmap(hba[i]->vaddr);
4723 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
4724 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4725 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4726 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
4727 kfree(hba[i]->cmd_pool_bits);
4728 /* Free up sg elements */
4729 for (j = 0; j < hba[i]->nr_cmds; j++)
4730 kfree(hba[i]->scatter_list[j]);
4731 kfree(hba[i]->scatter_list);
4732 cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
4734 * Deliberately omit pci_disable_device(): it does something nasty to
4735 * Smart Array controllers that pci_enable_device does not undo
4737 pci_release_regions(pdev);
4738 pci_set_drvdata(pdev, NULL);
4739 cciss_destroy_hba_sysfs_entry(hba[i]);
4740 mutex_unlock(&hba[i]->busy_shutting_down);
4744 static struct pci_driver cciss_pci_driver = {
4746 .probe = cciss_init_one,
4747 .remove = __devexit_p(cciss_remove_one),
4748 .id_table = cciss_pci_device_id, /* id_table */
4749 .shutdown = cciss_shutdown,
4753 * This is it. Register the PCI driver information for the cards we control
4754 * the OS will call our registered routines when it finds one of our cards.
4756 static int __init cciss_init(void)
4761 * The hardware requires that commands are aligned on a 64-bit
4762 * boundary. Given that we use pci_alloc_consistent() to allocate an
4763 * array of them, the size must be a multiple of 8 bytes.
4765 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
4766 printk(KERN_INFO DRIVER_NAME "\n");
4768 err = bus_register(&cciss_bus_type);
4772 /* Start the scan thread */
4773 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4774 if (IS_ERR(cciss_scan_thread)) {
4775 err = PTR_ERR(cciss_scan_thread);
4776 goto err_bus_unregister;
4779 /* Register for our PCI devices */
4780 err = pci_register_driver(&cciss_pci_driver);
4782 goto err_thread_stop;
4787 kthread_stop(cciss_scan_thread);
4789 bus_unregister(&cciss_bus_type);
4794 static void __exit cciss_cleanup(void)
4798 pci_unregister_driver(&cciss_pci_driver);
4799 /* double check that all controller entrys have been removed */
4800 for (i = 0; i < MAX_CTLR; i++) {
4801 if (hba[i] != NULL) {
4802 printk(KERN_WARNING "cciss: had to remove"
4803 " controller %d\n", i);
4804 cciss_remove_one(hba[i]->pdev);
4807 kthread_stop(cciss_scan_thread);
4808 remove_proc_entry("driver/cciss", NULL);
4809 bus_unregister(&cciss_bus_type);
4812 module_init(cciss_init);
4813 module_exit(cciss_cleanup);