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[net-next-2.6.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 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>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
1da177e4
LT		 39#include <linux/hdreg.h>
40#include <linux/spinlock.h>
41#include <linux/compat.h>
42#include <asm/uaccess.h>
43#include <asm/io.h>
44
eb0df996 45#include <linux/dma-mapping.h>
1da177e4
LT		 46#include <linux/blkdev.h>
47#include <linux/genhd.h>
48#include <linux/completion.h>
d5d3b736 49#include <scsi/scsi.h>
03bbfee5
MMOD		 50#include <scsi/sg.h>
51#include <scsi/scsi_ioctl.h>
52#include <linux/cdrom.h>
231bc2a2 53#include <linux/scatterlist.h>
0a9279cc 54#include <linux/kthread.h>
1da177e4
LT		 55
56#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 57#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
58#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 59
60/* Embedded module documentation macros - see modules.h */
61MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 62MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 63MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 64 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
65 " Smart Array G2 Series SAS/SATA Controllers");
66MODULE_VERSION("3.6.20");
1da177e4
LT		 67MODULE_LICENSE("GPL");
68
69#include "cciss_cmd.h"
70#include "cciss.h"
71#include <linux/cciss_ioctl.h>
72
73/* define the PCI info for the cards we can control */
74static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 75 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
76 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
84 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
85 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 102 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
103 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 104 {0,}
105};
7c832835 106
1da177e4
LT		 107MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
108
1da177e4
LT		 109/* board_id = Subsystem Device ID & Vendor ID
110 * product = Marketing Name for the board
7c832835 111 * access = Address of the struct of function pointers
1da177e4
LT		 112 */
113static struct board_type products[] = {
49153998
MM		 114 {0x40700E11, "Smart Array 5300", &SA5_access},
115 {0x40800E11, "Smart Array 5i", &SA5B_access},
116 {0x40820E11, "Smart Array 532", &SA5B_access},
117 {0x40830E11, "Smart Array 5312", &SA5B_access},
118 {0x409A0E11, "Smart Array 641", &SA5_access},
119 {0x409B0E11, "Smart Array 642", &SA5_access},
120 {0x409C0E11, "Smart Array 6400", &SA5_access},
121 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
122 {0x40910E11, "Smart Array 6i", &SA5_access},
123 {0x3225103C, "Smart Array P600", &SA5_access},
124 {0x3223103C, "Smart Array P800", &SA5_access},
125 {0x3234103C, "Smart Array P400", &SA5_access},
126 {0x3235103C, "Smart Array P400i", &SA5_access},
127 {0x3211103C, "Smart Array E200i", &SA5_access},
128 {0x3212103C, "Smart Array E200", &SA5_access},
129 {0x3213103C, "Smart Array E200i", &SA5_access},
130 {0x3214103C, "Smart Array E200i", &SA5_access},
131 {0x3215103C, "Smart Array E200i", &SA5_access},
132 {0x3237103C, "Smart Array E500", &SA5_access},
133 {0x323D103C, "Smart Array P700m", &SA5_access},
134 {0x3241103C, "Smart Array P212", &SA5_access},
135 {0x3243103C, "Smart Array P410", &SA5_access},
136 {0x3245103C, "Smart Array P410i", &SA5_access},
137 {0x3247103C, "Smart Array P411", &SA5_access},
138 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 139 {0x324A103C, "Smart Array P712m", &SA5_access},
140 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 141 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 142};
143
d14c4ab5 144/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 145#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 146#define MAX_IOCTL_CONFIG_WAIT 1000
147
148/*define how many times we will try a command because of bus resets */
149#define MAX_CMD_RETRIES 3
150
1da177e4
LT		 151#define MAX_CTLR 32
152
153/* Originally cciss driver only supports 8 major numbers */
154#define MAX_CTLR_ORIG 8
155
1da177e4
LT		 156static ctlr_info_t *hba[MAX_CTLR];
157
165125e1 158static void do_cciss_request(struct request_queue *q);
7d12e780 159static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 160static int cciss_open(struct block_device *bdev, fmode_t mode);
161static int cciss_release(struct gendisk *disk, fmode_t mode);
162static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 163 unsigned int cmd, unsigned long arg);
a885c8c4 164static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 165
1da177e4 166static int cciss_revalidate(struct gendisk *disk);
6ae5ce8e 167static int rebuild_lun_table(ctlr_info_t *h, int first_time);
a0ea8622 168static int deregister_disk(ctlr_info_t *h, int drv_index,
7c832835 169 int clear_all);
1da177e4 170
00988a35
MMOD		 171static void cciss_read_capacity(int ctlr, int logvol, int withirq,
172 sector_t *total_size, unsigned int *block_size);
173static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
174 sector_t *total_size, unsigned int *block_size);
175static void cciss_geometry_inquiry(int ctlr, int logvol,
176 int withirq, sector_t total_size,
177 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 178 drive_info_struct *drv);
7c832835
BH		 179static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
180 __u32);
181static void start_io(ctlr_info_t *h);
182static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
7c832835
BH		 183 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
184static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 185 __u8 page_code, unsigned char scsi3addr[],
186 int cmd_type);
85cc61ae 187static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
188 int attempt_retry);
189static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 190
33079b21 191static void fail_all_cmds(unsigned long ctlr);
0a9279cc
MM		 192static int scan_thread(void *data);
193static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
33079b21 194
1da177e4 195#ifdef CONFIG_PROC_FS
1da177e4
LT		 196static void cciss_procinit(int i);
197#else
7c832835
BH		 198static void cciss_procinit(int i)
199{
200}
201#endif /* CONFIG_PROC_FS */
1da177e4
LT		 202
203#ifdef CONFIG_COMPAT
ef7822c2
AV		 204static int cciss_compat_ioctl(struct block_device *, fmode_t,
205 unsigned, unsigned long);
1da177e4
LT		 206#endif
207
83d5cde4 208static const struct block_device_operations cciss_fops = {
7c832835 209 .owner = THIS_MODULE,
ef7822c2
AV		 210 .open = cciss_open,
211 .release = cciss_release,
212 .locked_ioctl = cciss_ioctl,
7c832835 213 .getgeo = cciss_getgeo,
1da177e4 214#ifdef CONFIG_COMPAT
ef7822c2 215 .compat_ioctl = cciss_compat_ioctl,
1da177e4 216#endif
7c832835 217 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 218};
219
220/*
221 * Enqueuing and dequeuing functions for cmdlists.
222 */
8a3173de 223static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 224{
8a3173de 225 hlist_add_head(&c->list, list);
1da177e4
LT		 226}
227
8a3173de 228static inline void removeQ(CommandList_struct *c)
1da177e4 229{
b59e64d0
HR		 230 /*
231 * After kexec/dump some commands might still
232 * be in flight, which the firmware will try
233 * to complete. Resetting the firmware doesn't work
234 * with old fw revisions, so we have to mark
235 * them off as 'stale' to prevent the driver from
236 * falling over.
237 */
238 if (WARN_ON(hlist_unhashed(&c->list))) {
239 c->cmd_type = CMD_MSG_STALE;
8a3173de 240 return;
b59e64d0 241 }
8a3173de
JA		 242
243 hlist_del_init(&c->list);
1da177e4
LT		 244}
245
246#include "cciss_scsi.c" /* For SCSI tape support */
247
0f5486ec
RD		 248#define RAID_UNKNOWN 6
249
1da177e4
LT		 250#ifdef CONFIG_PROC_FS
251
252/*
253 * Report information about this controller.
254 */
255#define ENG_GIG 1000000000
256#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 257#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 258static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
259 "UNKNOWN"
260};
1da177e4
LT		 261
262static struct proc_dir_entry *proc_cciss;
263
89b6e743 264static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 265{
89b6e743
MM		 266 ctlr_info_t *h = seq->private;
267
268 seq_printf(seq, "%s: HP %s Controller\n"
269 "Board ID: 0x%08lx\n"
270 "Firmware Version: %c%c%c%c\n"
271 "IRQ: %d\n"
272 "Logical drives: %d\n"
273 "Current Q depth: %d\n"
274 "Current # commands on controller: %d\n"
275 "Max Q depth since init: %d\n"
276 "Max # commands on controller since init: %d\n"
277 "Max SG entries since init: %d\n",
278 h->devname,
279 h->product_name,
280 (unsigned long)h->board_id,
281 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
282 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
283 h->num_luns,
284 h->Qdepth, h->commands_outstanding,
285 h->maxQsinceinit, h->max_outstanding, h->maxSG);
286
287#ifdef CONFIG_CISS_SCSI_TAPE
288 cciss_seq_tape_report(seq, h->ctlr);
289#endif /* CONFIG_CISS_SCSI_TAPE */
290}
1da177e4 291
89b6e743
MM		 292static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
293{
294 ctlr_info_t *h = seq->private;
295 unsigned ctlr = h->ctlr;
296 unsigned long flags;
1da177e4
LT		 297
298 /* prevent displaying bogus info during configuration
299 * or deconfiguration of a logical volume
300 */
301 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
302 if (h->busy_configuring) {
303 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 304 return ERR_PTR(-EBUSY);
1da177e4
LT		 305 }
306 h->busy_configuring = 1;
307 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
308
89b6e743
MM		 309 if (*pos == 0)
310 cciss_seq_show_header(seq);
311
312 return pos;
313}
314
315static int cciss_seq_show(struct seq_file *seq, void *v)
316{
317 sector_t vol_sz, vol_sz_frac;
318 ctlr_info_t *h = seq->private;
319 unsigned ctlr = h->ctlr;
320 loff_t *pos = v;
321 drive_info_struct *drv = &h->drv[*pos];
322
323 if (*pos > h->highest_lun)
324 return 0;
325
326 if (drv->heads == 0)
327 return 0;
328
329 vol_sz = drv->nr_blocks;
330 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
331 vol_sz_frac *= 100;
332 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
333
334 if (drv->raid_level > 5)
335 drv->raid_level = RAID_UNKNOWN;
336 seq_printf(seq, "cciss/c%dd%d:"
337 "\t%4u.%02uGB\tRAID %s\n",
338 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
339 raid_label[drv->raid_level]);
340 return 0;
341}
342
343static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
344{
345 ctlr_info_t *h = seq->private;
346
347 if (*pos > h->highest_lun)
348 return NULL;
349 *pos += 1;
350
351 return pos;
352}
353
354static void cciss_seq_stop(struct seq_file *seq, void *v)
355{
356 ctlr_info_t *h = seq->private;
357
358 /* Only reset h->busy_configuring if we succeeded in setting
359 * it during cciss_seq_start. */
360 if (v == ERR_PTR(-EBUSY))
361 return;
7c832835 362
1da177e4 363 h->busy_configuring = 0;
1da177e4
LT		 364}
365
89b6e743
MM		 366static struct seq_operations cciss_seq_ops = {
367 .start = cciss_seq_start,
368 .show = cciss_seq_show,
369 .next = cciss_seq_next,
370 .stop = cciss_seq_stop,
371};
372
373static int cciss_seq_open(struct inode *inode, struct file *file)
374{
375 int ret = seq_open(file, &cciss_seq_ops);
376 struct seq_file *seq = file->private_data;
377
378 if (!ret)
379 seq->private = PDE(inode)->data;
380
381 return ret;
382}
383
384static ssize_t
385cciss_proc_write(struct file *file, const char __user *buf,
386 size_t length, loff_t *ppos)
1da177e4 387{
89b6e743
MM		 388 int err;
389 char *buffer;
390
391#ifndef CONFIG_CISS_SCSI_TAPE
392 return -EINVAL;
1da177e4
LT		 393#endif
394
89b6e743 395 if (!buf || length > PAGE_SIZE - 1)
7c832835 396 return -EINVAL;
89b6e743
MM		 397
398 buffer = (char *)__get_free_page(GFP_KERNEL);
399 if (!buffer)
400 return -ENOMEM;
401
402 err = -EFAULT;
403 if (copy_from_user(buffer, buf, length))
404 goto out;
405 buffer[length] = '\0';
406
407#ifdef CONFIG_CISS_SCSI_TAPE
408 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
409 struct seq_file *seq = file->private_data;
410 ctlr_info_t *h = seq->private;
411 int rc;
412
7c832835
BH		 413 rc = cciss_engage_scsi(h->ctlr);
414 if (rc != 0)
89b6e743
MM		 415 err = -rc;
416 else
417 err = length;
418 } else
419#endif /* CONFIG_CISS_SCSI_TAPE */
420 err = -EINVAL;
7c832835
BH		 421 /* might be nice to have "disengage" too, but it's not
422 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 423
424out:
425 free_page((unsigned long)buffer);
426 return err;
1da177e4
LT		 427}
428
89b6e743
MM		 429static struct file_operations cciss_proc_fops = {
430 .owner = THIS_MODULE,
431 .open = cciss_seq_open,
432 .read = seq_read,
433 .llseek = seq_lseek,
434 .release = seq_release,
435 .write = cciss_proc_write,
436};
437
1da177e4
LT		 438static void __devinit cciss_procinit(int i)
439{
440 struct proc_dir_entry *pde;
441
89b6e743 442 if (proc_cciss == NULL)
928b4d8c 443 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 444 if (!proc_cciss)
445 return;
3dfcf9c4 446 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 447 S_IROTH, proc_cciss,
3dfcf9c4 448 &cciss_proc_fops, hba[i]);
1da177e4 449}
7c832835 450#endif /* CONFIG_PROC_FS */
1da177e4 451
7fe06326
AP		 452#define MAX_PRODUCT_NAME_LEN 19
453
454#define to_hba(n) container_of(n, struct ctlr_info, dev)
455#define to_drv(n) container_of(n, drive_info_struct, dev)
456
457static struct device_type cciss_host_type = {
458 .name = "cciss_host",
459};
460
461static ssize_t dev_show_unique_id(struct device *dev,
462 struct device_attribute *attr,
463 char *buf)
464{
465 drive_info_struct *drv = to_drv(dev);
466 struct ctlr_info *h = to_hba(drv->dev.parent);
467 __u8 sn[16];
468 unsigned long flags;
469 int ret = 0;
470
471 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
472 if (h->busy_configuring)
473 ret = -EBUSY;
474 else
475 memcpy(sn, drv->serial_no, sizeof(sn));
476 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
477
478 if (ret)
479 return ret;
480 else
481 return snprintf(buf, 16 * 2 + 2,
482 "%02X%02X%02X%02X%02X%02X%02X%02X"
483 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
484 sn[0], sn[1], sn[2], sn[3],
485 sn[4], sn[5], sn[6], sn[7],
486 sn[8], sn[9], sn[10], sn[11],
487 sn[12], sn[13], sn[14], sn[15]);
488}
489DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
490
491static ssize_t dev_show_vendor(struct device *dev,
492 struct device_attribute *attr,
493 char *buf)
494{
495 drive_info_struct *drv = to_drv(dev);
496 struct ctlr_info *h = to_hba(drv->dev.parent);
497 char vendor[VENDOR_LEN + 1];
498 unsigned long flags;
499 int ret = 0;
500
501 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
502 if (h->busy_configuring)
503 ret = -EBUSY;
504 else
505 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
506 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
507
508 if (ret)
509 return ret;
510 else
511 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
512}
513DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
514
515static ssize_t dev_show_model(struct device *dev,
516 struct device_attribute *attr,
517 char *buf)
518{
519 drive_info_struct *drv = to_drv(dev);
520 struct ctlr_info *h = to_hba(drv->dev.parent);
521 char model[MODEL_LEN + 1];
522 unsigned long flags;
523 int ret = 0;
524
525 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
526 if (h->busy_configuring)
527 ret = -EBUSY;
528 else
529 memcpy(model, drv->model, MODEL_LEN + 1);
530 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
531
532 if (ret)
533 return ret;
534 else
535 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
536}
537DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
538
539static ssize_t dev_show_rev(struct device *dev,
540 struct device_attribute *attr,
541 char *buf)
542{
543 drive_info_struct *drv = to_drv(dev);
544 struct ctlr_info *h = to_hba(drv->dev.parent);
545 char rev[REV_LEN + 1];
546 unsigned long flags;
547 int ret = 0;
548
549 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
550 if (h->busy_configuring)
551 ret = -EBUSY;
552 else
553 memcpy(rev, drv->rev, REV_LEN + 1);
554 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
555
556 if (ret)
557 return ret;
558 else
559 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
560}
561DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
562
563static struct attribute *cciss_dev_attrs[] = {
564 &dev_attr_unique_id.attr,
565 &dev_attr_model.attr,
566 &dev_attr_vendor.attr,
567 &dev_attr_rev.attr,
568 NULL
569};
570
571static struct attribute_group cciss_dev_attr_group = {
572 .attrs = cciss_dev_attrs,
573};
574
a4dbd674 575static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 576 &cciss_dev_attr_group,
577 NULL
578};
579
580static struct device_type cciss_dev_type = {
581 .name = "cciss_device",
582 .groups = cciss_dev_attr_groups,
583};
584
585static struct bus_type cciss_bus_type = {
586 .name = "cciss",
587};
588
589
590/*
591 * Initialize sysfs entry for each controller. This sets up and registers
592 * the 'cciss#' directory for each individual controller under
593 * /sys/bus/pci/devices/<dev>/.
594 */
595static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
596{
597 device_initialize(&h->dev);
598 h->dev.type = &cciss_host_type;
599 h->dev.bus = &cciss_bus_type;
600 dev_set_name(&h->dev, "%s", h->devname);
601 h->dev.parent = &h->pdev->dev;
602
603 return device_add(&h->dev);
604}
605
606/*
607 * Remove sysfs entries for an hba.
608 */
609static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
610{
611 device_del(&h->dev);
612}
613
614/*
615 * Initialize sysfs for each logical drive. This sets up and registers
616 * the 'c#d#' directory for each individual logical drive under
617 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
618 * /sys/block/cciss!c#d# to this entry.
619 */
620static int cciss_create_ld_sysfs_entry(struct ctlr_info *h,
621 drive_info_struct *drv,
622 int drv_index)
623{
624 device_initialize(&drv->dev);
625 drv->dev.type = &cciss_dev_type;
626 drv->dev.bus = &cciss_bus_type;
627 dev_set_name(&drv->dev, "c%dd%d", h->ctlr, drv_index);
628 drv->dev.parent = &h->dev;
629 return device_add(&drv->dev);
630}
631
632/*
633 * Remove sysfs entries for a logical drive.
634 */
635static void cciss_destroy_ld_sysfs_entry(drive_info_struct *drv)
636{
637 device_del(&drv->dev);
638}
639
7c832835
BH		 640/*
641 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 642 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 643 * which ones are free or in use. For operations that can wait for kmalloc
644 * to possible sleep, this routine can be called with get_from_pool set to 0.
645 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
646 */
647static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 648{
649 CommandList_struct *c;
7c832835 650 int i;
1da177e4
LT		 651 u64bit temp64;
652 dma_addr_t cmd_dma_handle, err_dma_handle;
653
7c832835
BH		 654 if (!get_from_pool) {
655 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
656 sizeof(CommandList_struct), &cmd_dma_handle);
657 if (c == NULL)
658 return NULL;
1da177e4
LT		 659 memset(c, 0, sizeof(CommandList_struct));
660
33079b21
MM		 661 c->cmdindex = -1;
662
7c832835
BH		 663 c->err_info = (ErrorInfo_struct *)
664 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
665 &err_dma_handle);
666
667 if (c->err_info == NULL) {
668 pci_free_consistent(h->pdev,
1da177e4
LT		 669 sizeof(CommandList_struct), c, cmd_dma_handle);
670 return NULL;
671 }
672 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 673 } else { /* get it out of the controllers pool */
674
675 do {
f880632f
MM		 676 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
677 if (i == h->nr_cmds)
7c832835
BH		 678 return NULL;
679 } while (test_and_set_bit
680 (i & (BITS_PER_LONG - 1),
681 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 682#ifdef CCISS_DEBUG
683 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
684#endif
7c832835 685 c = h->cmd_pool + i;
1da177e4 686 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 687 cmd_dma_handle = h->cmd_pool_dhandle
688 + i * sizeof(CommandList_struct);
1da177e4
LT		 689 c->err_info = h->errinfo_pool + i;
690 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 691 err_dma_handle = h->errinfo_pool_dhandle
692 + i * sizeof(ErrorInfo_struct);
693 h->nr_allocs++;
33079b21
MM		 694
695 c->cmdindex = i;
7c832835 696 }
1da177e4 697
8a3173de 698 INIT_HLIST_NODE(&c->list);
1da177e4 699 c->busaddr = (__u32) cmd_dma_handle;
7c832835 700 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 701 c->ErrDesc.Addr.lower = temp64.val32.lower;
702 c->ErrDesc.Addr.upper = temp64.val32.upper;
703 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 704
7c832835
BH		 705 c->ctlr = h->ctlr;
706 return c;
1da177e4
LT		 707}
708
7c832835
BH		 709/*
710 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 711 */
712static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
713{
714 int i;
715 u64bit temp64;
716
7c832835 717 if (!got_from_pool) {
1da177e4
LT		 718 temp64.val32.lower = c->ErrDesc.Addr.lower;
719 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 720 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
721 c->err_info, (dma_addr_t) temp64.val);
722 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
723 c, (dma_addr_t) c->busaddr);
724 } else {
1da177e4 725 i = c - h->cmd_pool;
7c832835
BH		 726 clear_bit(i & (BITS_PER_LONG - 1),
727 h->cmd_pool_bits + (i / BITS_PER_LONG));
728 h->nr_frees++;
729 }
1da177e4
LT		 730}
731
732static inline ctlr_info_t *get_host(struct gendisk *disk)
733{
7c832835 734 return disk->queue->queuedata;
1da177e4
LT		 735}
736
737static inline drive_info_struct *get_drv(struct gendisk *disk)
738{
739 return disk->private_data;
740}
741
742/*
743 * Open. Make sure the device is really there.
744 */
ef7822c2 745static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 746{
ef7822c2
AV		 747 ctlr_info_t *host = get_host(bdev->bd_disk);
748 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 749
750#ifdef CCISS_DEBUG
ef7822c2 751 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 752#endif /* CCISS_DEBUG */
1da177e4 753
ddd47442
MM		 754 if (host->busy_initializing || drv->busy_configuring)
755 return -EBUSY;
1da177e4
LT		 756 /*
757 * Root is allowed to open raw volume zero even if it's not configured
758 * so array config can still work. Root is also allowed to open any
759 * volume that has a LUN ID, so it can issue IOCTL to reread the
760 * disk information. I don't think I really like this
761 * but I'm already using way to many device nodes to claim another one
762 * for "raw controller".
763 */
7a06f789 764 if (drv->heads == 0) {
ef7822c2 765 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 766 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 767 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 768 return -ENXIO;
1da177e4
LT		 769 /* if it is, make sure we have a LUN ID */
770 } else if (drv->LunID == 0) {
771 return -ENXIO;
772 }
773 }
774 if (!capable(CAP_SYS_ADMIN))
775 return -EPERM;
776 }
777 drv->usage_count++;
778 host->usage_count++;
779 return 0;
780}
7c832835 781
1da177e4
LT		 782/*
783 * Close. Sync first.
784 */
ef7822c2 785static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 786{
ef7822c2
AV		 787 ctlr_info_t *host = get_host(disk);
788 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 789
790#ifdef CCISS_DEBUG
ef7822c2 791 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 792#endif /* CCISS_DEBUG */
1da177e4
LT		 793
794 drv->usage_count--;
795 host->usage_count--;
796 return 0;
797}
798
799#ifdef CONFIG_COMPAT
800
ef7822c2
AV		 801static int do_ioctl(struct block_device *bdev, fmode_t mode,
802 unsigned cmd, unsigned long arg)
1da177e4
LT		 803{
804 int ret;
805 lock_kernel();
ef7822c2 806 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 807 unlock_kernel();
808 return ret;
809}
810
ef7822c2
AV		 811static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
812 unsigned cmd, unsigned long arg);
813static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
814 unsigned cmd, unsigned long arg);
1da177e4 815
ef7822c2
AV		 816static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
817 unsigned cmd, unsigned long arg)
1da177e4
LT		 818{
819 switch (cmd) {
820 case CCISS_GETPCIINFO:
821 case CCISS_GETINTINFO:
822 case CCISS_SETINTINFO:
823 case CCISS_GETNODENAME:
824 case CCISS_SETNODENAME:
825 case CCISS_GETHEARTBEAT:
826 case CCISS_GETBUSTYPES:
827 case CCISS_GETFIRMVER:
828 case CCISS_GETDRIVVER:
829 case CCISS_REVALIDVOLS:
830 case CCISS_DEREGDISK:
831 case CCISS_REGNEWDISK:
832 case CCISS_REGNEWD:
833 case CCISS_RESCANDISK:
834 case CCISS_GETLUNINFO:
ef7822c2 835 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 836
837 case CCISS_PASSTHRU32:
ef7822c2 838 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 839 case CCISS_BIG_PASSTHRU32:
ef7822c2 840 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 841
842 default:
843 return -ENOIOCTLCMD;
844 }
845}
846
ef7822c2
AV		 847static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
848 unsigned cmd, unsigned long arg)
1da177e4
LT		 849{
850 IOCTL32_Command_struct __user *arg32 =
7c832835 851 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 852 IOCTL_Command_struct arg64;
853 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
854 int err;
855 u32 cp;
856
857 err = 0;
7c832835
BH		 858 err |=
859 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
860 sizeof(arg64.LUN_info));
861 err |=
862 copy_from_user(&arg64.Request, &arg32->Request,
863 sizeof(arg64.Request));
864 err |=
865 copy_from_user(&arg64.error_info, &arg32->error_info,
866 sizeof(arg64.error_info));
1da177e4
LT		 867 err |= get_user(arg64.buf_size, &arg32->buf_size);
868 err |= get_user(cp, &arg32->buf);
869 arg64.buf = compat_ptr(cp);
870 err |= copy_to_user(p, &arg64, sizeof(arg64));
871
872 if (err)
873 return -EFAULT;
874
ef7822c2 875 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 876 if (err)
877 return err;
7c832835
BH		 878 err |=
879 copy_in_user(&arg32->error_info, &p->error_info,
880 sizeof(arg32->error_info));
1da177e4
LT		 881 if (err)
882 return -EFAULT;
883 return err;
884}
885
ef7822c2
AV		 886static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
887 unsigned cmd, unsigned long arg)
1da177e4
LT		 888{
889 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 890 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 891 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 892 BIG_IOCTL_Command_struct __user *p =
893 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 894 int err;
895 u32 cp;
896
897 err = 0;
7c832835
BH		 898 err |=
899 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
900 sizeof(arg64.LUN_info));
901 err |=
902 copy_from_user(&arg64.Request, &arg32->Request,
903 sizeof(arg64.Request));
904 err |=
905 copy_from_user(&arg64.error_info, &arg32->error_info,
906 sizeof(arg64.error_info));
1da177e4
LT		 907 err |= get_user(arg64.buf_size, &arg32->buf_size);
908 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
909 err |= get_user(cp, &arg32->buf);
910 arg64.buf = compat_ptr(cp);
911 err |= copy_to_user(p, &arg64, sizeof(arg64));
912
913 if (err)
7c832835 914 return -EFAULT;
1da177e4 915
ef7822c2 916 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 917 if (err)
918 return err;
7c832835
BH		 919 err |=
920 copy_in_user(&arg32->error_info, &p->error_info,
921 sizeof(arg32->error_info));
1da177e4
LT		 922 if (err)
923 return -EFAULT;
924 return err;
925}
926#endif
a885c8c4
CH		 927
928static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
929{
930 drive_info_struct *drv = get_drv(bdev->bd_disk);
931
932 if (!drv->cylinders)
933 return -ENXIO;
934
935 geo->heads = drv->heads;
936 geo->sectors = drv->sectors;
937 geo->cylinders = drv->cylinders;
938 return 0;
939}
940
0a9279cc
MM		 941static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
942{
943 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
944 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
945 (void)check_for_unit_attention(host, c);
946}
1da177e4 947/*
7c832835 948 * ioctl
1da177e4 949 */
ef7822c2 950static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 951 unsigned int cmd, unsigned long arg)
1da177e4 952{
1da177e4
LT		 953 struct gendisk *disk = bdev->bd_disk;
954 ctlr_info_t *host = get_host(disk);
955 drive_info_struct *drv = get_drv(disk);
956 int ctlr = host->ctlr;
957 void __user *argp = (void __user *)arg;
958
959#ifdef CCISS_DEBUG
960 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 961#endif /* CCISS_DEBUG */
962
963 switch (cmd) {
1da177e4 964 case CCISS_GETPCIINFO:
7c832835
BH		 965 {
966 cciss_pci_info_struct pciinfo;
967
968 if (!arg)
969 return -EINVAL;
970 pciinfo.domain = pci_domain_nr(host->pdev->bus);
971 pciinfo.bus = host->pdev->bus->number;
972 pciinfo.dev_fn = host->pdev->devfn;
973 pciinfo.board_id = host->board_id;
974 if (copy_to_user
975 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
976 return -EFAULT;
977 return 0;
978 }
1da177e4 979 case CCISS_GETINTINFO:
7c832835
BH		 980 {
981 cciss_coalint_struct intinfo;
982 if (!arg)
983 return -EINVAL;
984 intinfo.delay =
985 readl(&host->cfgtable->HostWrite.CoalIntDelay);
986 intinfo.count =
987 readl(&host->cfgtable->HostWrite.CoalIntCount);
988 if (copy_to_user
989 (argp, &intinfo, sizeof(cciss_coalint_struct)))
990 return -EFAULT;
991 return 0;
992 }
1da177e4 993 case CCISS_SETINTINFO:
1da177e4 994 {
7c832835
BH		 995 cciss_coalint_struct intinfo;
996 unsigned long flags;
997 int i;
998
999 if (!arg)
1000 return -EINVAL;
1001 if (!capable(CAP_SYS_ADMIN))
1002 return -EPERM;
1003 if (copy_from_user
1004 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1005 return -EFAULT;
1006 if ((intinfo.delay == 0) && (intinfo.count == 0))
1007 {
1008// printk("cciss_ioctl: delay and count cannot be 0\n");
1009 return -EINVAL;
1010 }
1011 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1012 /* Update the field, and then ring the doorbell */
1013 writel(intinfo.delay,
1014 &(host->cfgtable->HostWrite.CoalIntDelay));
1015 writel(intinfo.count,
1016 &(host->cfgtable->HostWrite.CoalIntCount));
1017 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1018
1019 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1020 if (!(readl(host->vaddr + SA5_DOORBELL)
1021 & CFGTBL_ChangeReq))
1022 break;
1023 /* delay and try again */
1024 udelay(1000);
1025 }
1026 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1027 if (i >= MAX_IOCTL_CONFIG_WAIT)
1028 return -EAGAIN;
1029 return 0;
1da177e4 1030 }
1da177e4 1031 case CCISS_GETNODENAME:
7c832835
BH		 1032 {
1033 NodeName_type NodeName;
1034 int i;
1035
1036 if (!arg)
1037 return -EINVAL;
1038 for (i = 0; i < 16; i++)
1039 NodeName[i] =
1040 readb(&host->cfgtable->ServerName[i]);
1041 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1042 return -EFAULT;
1043 return 0;
1044 }
1da177e4 1045 case CCISS_SETNODENAME:
7c832835
BH		 1046 {
1047 NodeName_type NodeName;
1048 unsigned long flags;
1049 int i;
1050
1051 if (!arg)
1052 return -EINVAL;
1053 if (!capable(CAP_SYS_ADMIN))
1054 return -EPERM;
1055
1056 if (copy_from_user
1057 (NodeName, argp, sizeof(NodeName_type)))
1058 return -EFAULT;
1059
1060 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1061
1062 /* Update the field, and then ring the doorbell */
1063 for (i = 0; i < 16; i++)
1064 writeb(NodeName[i],
1065 &host->cfgtable->ServerName[i]);
1066
1067 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1068
1069 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1070 if (!(readl(host->vaddr + SA5_DOORBELL)
1071 & CFGTBL_ChangeReq))
1072 break;
1073 /* delay and try again */
1074 udelay(1000);
1075 }
1076 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1077 if (i >= MAX_IOCTL_CONFIG_WAIT)
1078 return -EAGAIN;
1079 return 0;
1080 }
1da177e4
LT		 1081
1082 case CCISS_GETHEARTBEAT:
7c832835
BH		 1083 {
1084 Heartbeat_type heartbeat;
1085
1086 if (!arg)
1087 return -EINVAL;
1088 heartbeat = readl(&host->cfgtable->HeartBeat);
1089 if (copy_to_user
1090 (argp, &heartbeat, sizeof(Heartbeat_type)))
1091 return -EFAULT;
1092 return 0;
1093 }
1da177e4 1094 case CCISS_GETBUSTYPES:
7c832835
BH		 1095 {
1096 BusTypes_type BusTypes;
1097
1098 if (!arg)
1099 return -EINVAL;
1100 BusTypes = readl(&host->cfgtable->BusTypes);
1101 if (copy_to_user
1102 (argp, &BusTypes, sizeof(BusTypes_type)))
1103 return -EFAULT;
1104 return 0;
1105 }
1da177e4 1106 case CCISS_GETFIRMVER:
7c832835
BH		 1107 {
1108 FirmwareVer_type firmware;
1da177e4 1109
7c832835
BH		 1110 if (!arg)
1111 return -EINVAL;
1112 memcpy(firmware, host->firm_ver, 4);
1da177e4 1113
7c832835
BH		 1114 if (copy_to_user
1115 (argp, firmware, sizeof(FirmwareVer_type)))
1116 return -EFAULT;
1117 return 0;
1118 }
1119 case CCISS_GETDRIVVER:
1120 {
1121 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1122
7c832835
BH		 1123 if (!arg)
1124 return -EINVAL;
1da177e4 1125
7c832835
BH		 1126 if (copy_to_user
1127 (argp, &DriverVer, sizeof(DriverVer_type)))
1128 return -EFAULT;
1129 return 0;
1130 }
1da177e4 1131
6ae5ce8e
MM		 1132 case CCISS_DEREGDISK:
1133 case CCISS_REGNEWD:
1da177e4 1134 case CCISS_REVALIDVOLS:
6ae5ce8e 1135 return rebuild_lun_table(host, 0);
7c832835
BH		 1136
1137 case CCISS_GETLUNINFO:{
1138 LogvolInfo_struct luninfo;
1139
1140 luninfo.LunID = drv->LunID;
1141 luninfo.num_opens = drv->usage_count;
1142 luninfo.num_parts = 0;
1143 if (copy_to_user(argp, &luninfo,
1144 sizeof(LogvolInfo_struct)))
1145 return -EFAULT;
1146 return 0;
1147 }
1da177e4 1148 case CCISS_PASSTHRU:
1da177e4 1149 {
7c832835
BH		 1150 IOCTL_Command_struct iocommand;
1151 CommandList_struct *c;
1152 char *buff = NULL;
1153 u64bit temp64;
1154 unsigned long flags;
6e9a4738 1155 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1156
7c832835
BH		 1157 if (!arg)
1158 return -EINVAL;
1da177e4 1159
7c832835
BH		 1160 if (!capable(CAP_SYS_RAWIO))
1161 return -EPERM;
1da177e4 1162
7c832835
BH		 1163 if (copy_from_user
1164 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1165 return -EFAULT;
1166 if ((iocommand.buf_size < 1) &&
1167 (iocommand.Request.Type.Direction != XFER_NONE)) {
1168 return -EINVAL;
1169 }
1170#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1171 /* Check kmalloc limits */
1172 if (iocommand.buf_size > 128000)
1173 return -EINVAL;
1174#endif
1175 if (iocommand.buf_size > 0) {
1176 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1177 if (buff == NULL)
1178 return -EFAULT;
1179 }
1180 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1181 /* Copy the data into the buffer we created */
1182 if (copy_from_user
1183 (buff, iocommand.buf, iocommand.buf_size)) {
1184 kfree(buff);
1185 return -EFAULT;
1186 }
1187 } else {
1188 memset(buff, 0, iocommand.buf_size);
1189 }
1190 if ((c = cmd_alloc(host, 0)) == NULL) {
1191 kfree(buff);
1192 return -ENOMEM;
1193 }
1194 // Fill in the command type
1195 c->cmd_type = CMD_IOCTL_PEND;
1196 // Fill in Command Header
1197 c->Header.ReplyQueue = 0; // unused in simple mode
1198 if (iocommand.buf_size > 0) // buffer to fill
1199 {
1200 c->Header.SGList = 1;
1201 c->Header.SGTotal = 1;
1202 } else // no buffers to fill
1203 {
1204 c->Header.SGList = 0;
1205 c->Header.SGTotal = 0;
1206 }
1207 c->Header.LUN = iocommand.LUN_info;
1208 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1209
7c832835
BH		 1210 // Fill in Request block
1211 c->Request = iocommand.Request;
1da177e4 1212
7c832835
BH		 1213 // Fill in the scatter gather information
1214 if (iocommand.buf_size > 0) {
1215 temp64.val = pci_map_single(host->pdev, buff,
1216 iocommand.buf_size,
1217 PCI_DMA_BIDIRECTIONAL);
1218 c->SG[0].Addr.lower = temp64.val32.lower;
1219 c->SG[0].Addr.upper = temp64.val32.upper;
1220 c->SG[0].Len = iocommand.buf_size;
1221 c->SG[0].Ext = 0; // we are not chaining
1222 }
1223 c->waiting = &wait;
1224
1225 /* Put the request on the tail of the request queue */
1226 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1227 addQ(&host->reqQ, c);
1228 host->Qdepth++;
1229 start_io(host);
1230 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1231
1232 wait_for_completion(&wait);
1233
1234 /* unlock the buffers from DMA */
1235 temp64.val32.lower = c->SG[0].Addr.lower;
1236 temp64.val32.upper = c->SG[0].Addr.upper;
1237 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1238 iocommand.buf_size,
1239 PCI_DMA_BIDIRECTIONAL);
1240
0a9279cc
MM		 1241 check_ioctl_unit_attention(host, c);
1242
7c832835
BH		 1243 /* Copy the error information out */
1244 iocommand.error_info = *(c->err_info);
1245 if (copy_to_user
1246 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1247 kfree(buff);
1da177e4
LT		 1248 cmd_free(host, c, 0);
1249 return -EFAULT;
1250 }
7c832835
BH		 1251
1252 if (iocommand.Request.Type.Direction == XFER_READ) {
1253 /* Copy the data out of the buffer we created */
1254 if (copy_to_user
1255 (iocommand.buf, buff, iocommand.buf_size)) {
1256 kfree(buff);
1257 cmd_free(host, c, 0);
1258 return -EFAULT;
1259 }
1260 }
1261 kfree(buff);
1262 cmd_free(host, c, 0);
1263 return 0;
1da177e4 1264 }
7c832835
BH		 1265 case CCISS_BIG_PASSTHRU:{
1266 BIG_IOCTL_Command_struct *ioc;
1267 CommandList_struct *c;
1268 unsigned char **buff = NULL;
1269 int *buff_size = NULL;
1270 u64bit temp64;
1271 unsigned long flags;
1272 BYTE sg_used = 0;
1273 int status = 0;
1274 int i;
6e9a4738 1275 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1276 __u32 left;
1277 __u32 sz;
1278 BYTE __user *data_ptr;
1279
1280 if (!arg)
1281 return -EINVAL;
1282 if (!capable(CAP_SYS_RAWIO))
1283 return -EPERM;
1284 ioc = (BIG_IOCTL_Command_struct *)
1285 kmalloc(sizeof(*ioc), GFP_KERNEL);
1286 if (!ioc) {
1287 status = -ENOMEM;
1288 goto cleanup1;
1289 }
1290 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1291 status = -EFAULT;
1292 goto cleanup1;
1293 }
1294 if ((ioc->buf_size < 1) &&
1295 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1296 status = -EINVAL;
1297 goto cleanup1;
7c832835
BH		 1298 }
1299 /* Check kmalloc limits using all SGs */
1300 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1301 status = -EINVAL;
1302 goto cleanup1;
1303 }
1304 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1305 status = -EINVAL;
1306 goto cleanup1;
1307 }
1308 buff =
1309 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1310 if (!buff) {
1da177e4
LT		 1311 status = -ENOMEM;
1312 goto cleanup1;
1313 }
5cbded58 1314 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1315 GFP_KERNEL);
1316 if (!buff_size) {
1317 status = -ENOMEM;
1318 goto cleanup1;
1319 }
1320 left = ioc->buf_size;
1321 data_ptr = ioc->buf;
1322 while (left) {
1323 sz = (left >
1324 ioc->malloc_size) ? ioc->
1325 malloc_size : left;
1326 buff_size[sg_used] = sz;
1327 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1328 if (buff[sg_used] == NULL) {
1da177e4 1329 status = -ENOMEM;
15534d38
JA		 1330 goto cleanup1;
1331 }
7c832835
BH		 1332 if (ioc->Request.Type.Direction == XFER_WRITE) {
1333 if (copy_from_user
1334 (buff[sg_used], data_ptr, sz)) {
f7108f91 1335 status = -EFAULT;
7c832835
BH		 1336 goto cleanup1;
1337 }
1338 } else {
1339 memset(buff[sg_used], 0, sz);
1340 }
1341 left -= sz;
1342 data_ptr += sz;
1343 sg_used++;
1344 }
1345 if ((c = cmd_alloc(host, 0)) == NULL) {
1346 status = -ENOMEM;
1347 goto cleanup1;
1348 }
1349 c->cmd_type = CMD_IOCTL_PEND;
1350 c->Header.ReplyQueue = 0;
1351
1352 if (ioc->buf_size > 0) {
1353 c->Header.SGList = sg_used;
1354 c->Header.SGTotal = sg_used;
1da177e4 1355 } else {
7c832835
BH		 1356 c->Header.SGList = 0;
1357 c->Header.SGTotal = 0;
1da177e4 1358 }
7c832835
BH		 1359 c->Header.LUN = ioc->LUN_info;
1360 c->Header.Tag.lower = c->busaddr;
1361
1362 c->Request = ioc->Request;
1363 if (ioc->buf_size > 0) {
1364 int i;
1365 for (i = 0; i < sg_used; i++) {
1366 temp64.val =
1367 pci_map_single(host->pdev, buff[i],
1368 buff_size[i],
1369 PCI_DMA_BIDIRECTIONAL);
1370 c->SG[i].Addr.lower =
1371 temp64.val32.lower;
1372 c->SG[i].Addr.upper =
1373 temp64.val32.upper;
1374 c->SG[i].Len = buff_size[i];
1375 c->SG[i].Ext = 0; /* we are not chaining */
1376 }
1377 }
1378 c->waiting = &wait;
1379 /* Put the request on the tail of the request queue */
1380 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1381 addQ(&host->reqQ, c);
1382 host->Qdepth++;
1383 start_io(host);
1384 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1385 wait_for_completion(&wait);
1386 /* unlock the buffers from DMA */
1387 for (i = 0; i < sg_used; i++) {
1388 temp64.val32.lower = c->SG[i].Addr.lower;
1389 temp64.val32.upper = c->SG[i].Addr.upper;
1390 pci_unmap_single(host->pdev,
1391 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1392 PCI_DMA_BIDIRECTIONAL);
1da177e4 1393 }
0a9279cc 1394 check_ioctl_unit_attention(host, c);
7c832835
BH		 1395 /* Copy the error information out */
1396 ioc->error_info = *(c->err_info);
1397 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1398 cmd_free(host, c, 0);
1399 status = -EFAULT;
1400 goto cleanup1;
1401 }
1402 if (ioc->Request.Type.Direction == XFER_READ) {
1403 /* Copy the data out of the buffer we created */
1404 BYTE __user *ptr = ioc->buf;
1405 for (i = 0; i < sg_used; i++) {
1406 if (copy_to_user
1407 (ptr, buff[i], buff_size[i])) {
1408 cmd_free(host, c, 0);
1409 status = -EFAULT;
1410 goto cleanup1;
1411 }
1412 ptr += buff_size[i];
1da177e4 1413 }
1da177e4 1414 }
7c832835
BH		 1415 cmd_free(host, c, 0);
1416 status = 0;
1417 cleanup1:
1418 if (buff) {
1419 for (i = 0; i < sg_used; i++)
1420 kfree(buff[i]);
1421 kfree(buff);
1422 }
1423 kfree(buff_size);
1424 kfree(ioc);
1425 return status;
1da177e4 1426 }
03bbfee5
MMOD		 1427
1428 /* scsi_cmd_ioctl handles these, below, though some are not */
1429 /* very meaningful for cciss. SG_IO is the main one people want. */
1430
1431 case SG_GET_VERSION_NUM:
1432 case SG_SET_TIMEOUT:
1433 case SG_GET_TIMEOUT:
1434 case SG_GET_RESERVED_SIZE:
1435 case SG_SET_RESERVED_SIZE:
1436 case SG_EMULATED_HOST:
1437 case SG_IO:
1438 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1439 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1440
1441 /* scsi_cmd_ioctl would normally handle these, below, but */
1442 /* they aren't a good fit for cciss, as CD-ROMs are */
1443 /* not supported, and we don't have any bus/target/lun */
1444 /* which we present to the kernel. */
1445
1446 case CDROM_SEND_PACKET:
1447 case CDROMCLOSETRAY:
1448 case CDROMEJECT:
1449 case SCSI_IOCTL_GET_IDLUN:
1450 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1451 default:
1452 return -ENOTTY;
1453 }
1da177e4
LT		 1454}
1455
7b30f092
JA		 1456static void cciss_check_queues(ctlr_info_t *h)
1457{
1458 int start_queue = h->next_to_run;
1459 int i;
1460
1461 /* check to see if we have maxed out the number of commands that can
1462 * be placed on the queue. If so then exit. We do this check here
1463 * in case the interrupt we serviced was from an ioctl and did not
1464 * free any new commands.
1465 */
f880632f 1466 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1467 return;
1468
1469 /* We have room on the queue for more commands. Now we need to queue
1470 * them up. We will also keep track of the next queue to run so
1471 * that every queue gets a chance to be started first.
1472 */
1473 for (i = 0; i < h->highest_lun + 1; i++) {
1474 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1475 /* make sure the disk has been added and the drive is real
1476 * because this can be called from the middle of init_one.
1477 */
1478 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1479 continue;
1480 blk_start_queue(h->gendisk[curr_queue]->queue);
1481
1482 /* check to see if we have maxed out the number of commands
1483 * that can be placed on the queue.
1484 */
f880632f 1485 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1486 if (curr_queue == start_queue) {
1487 h->next_to_run =
1488 (start_queue + 1) % (h->highest_lun + 1);
1489 break;
1490 } else {
1491 h->next_to_run = curr_queue;
1492 break;
1493 }
7b30f092
JA		 1494 }
1495 }
1496}
1497
ca1e0484
MM		 1498static void cciss_softirq_done(struct request *rq)
1499{
1500 CommandList_struct *cmd = rq->completion_data;
1501 ctlr_info_t *h = hba[cmd->ctlr];
1502 unsigned long flags;
1503 u64bit temp64;
1504 int i, ddir;
1505
1506 if (cmd->Request.Type.Direction == XFER_READ)
1507 ddir = PCI_DMA_FROMDEVICE;
1508 else
1509 ddir = PCI_DMA_TODEVICE;
1510
1511 /* command did not need to be retried */
1512 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1513 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1514 temp64.val32.lower = cmd->SG[i].Addr.lower;
1515 temp64.val32.upper = cmd->SG[i].Addr.upper;
1516 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1517 }
1518
ca1e0484
MM		 1519#ifdef CCISS_DEBUG
1520 printk("Done with %p\n", rq);
7c832835 1521#endif /* CCISS_DEBUG */
ca1e0484 1522
c3a4d78c 1523 /* set the residual count for pc requests */
ac44e5b2 1524 if (blk_pc_request(rq))
c3a4d78c 1525 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1526
c3a4d78c 1527 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1528
ca1e0484 1529 spin_lock_irqsave(&h->lock, flags);
7c832835 1530 cmd_free(h, cmd, 1);
7b30f092 1531 cciss_check_queues(h);
ca1e0484
MM		 1532 spin_unlock_irqrestore(&h->lock, flags);
1533}
1534
b57695fe 1535static void log_unit_to_scsi3addr(ctlr_info_t *h, unsigned char scsi3addr[],
1536 uint32_t log_unit)
1537{
1538 log_unit = h->drv[log_unit].LunID & 0x03fff;
1539 memset(&scsi3addr[4], 0, 4);
1540 memcpy(&scsi3addr[0], &log_unit, 4);
1541 scsi3addr[3] |= 0x40;
1542}
1543
7fe06326
AP		 1544/* This function gets the SCSI vendor, model, and revision of a logical drive
1545 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1546 * they cannot be read.
1547 */
1548static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1549 char *vendor, char *model, char *rev)
1550{
1551 int rc;
1552 InquiryData_struct *inq_buf;
b57695fe 1553 unsigned char scsi3addr[8];
7fe06326
AP		 1554
1555 *vendor = '\0';
1556 *model = '\0';
1557 *rev = '\0';
1558
1559 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1560 if (!inq_buf)
1561 return;
1562
b57695fe 1563 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1564 if (withirq)
1565 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1566 sizeof(InquiryData_struct), 0,
1567 scsi3addr, TYPE_CMD);
7fe06326
AP		 1568 else
1569 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1570 sizeof(InquiryData_struct), 0,
1571 scsi3addr, TYPE_CMD);
7fe06326
AP		 1572 if (rc == IO_OK) {
1573 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1574 vendor[VENDOR_LEN] = '\0';
1575 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1576 model[MODEL_LEN] = '\0';
1577 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1578 rev[REV_LEN] = '\0';
1579 }
1580
1581 kfree(inq_buf);
1582 return;
1583}
1584
a72da29b
MM		 1585/* This function gets the serial number of a logical drive via
1586 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1587 * number cannot be had, for whatever reason, 16 bytes of 0xff
1588 * are returned instead.
1589 */
1590static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1591 unsigned char *serial_no, int buflen)
1592{
1593#define PAGE_83_INQ_BYTES 64
1594 int rc;
1595 unsigned char *buf;
b57695fe 1596 unsigned char scsi3addr[8];
a72da29b
MM		 1597
1598 if (buflen > 16)
1599 buflen = 16;
1600 memset(serial_no, 0xff, buflen);
1601 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1602 if (!buf)
1603 return;
1604 memset(serial_no, 0, buflen);
b57695fe 1605 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1606 if (withirq)
1607 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1608 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1609 else
1610 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1611 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1612 if (rc == IO_OK)
1613 memcpy(serial_no, &buf[8], buflen);
1614 kfree(buf);
1615 return;
1616}
1617
6ae5ce8e
MM		 1618static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1619 int drv_index)
1620{
1621 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1622 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1623 disk->major = h->major;
1624 disk->first_minor = drv_index << NWD_SHIFT;
1625 disk->fops = &cciss_fops;
1626 disk->private_data = &h->drv[drv_index];
7fe06326 1627 disk->driverfs_dev = &h->drv[drv_index].dev;
6ae5ce8e
MM		 1628
1629 /* Set up queue information */
1630 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1631
1632 /* This is a hardware imposed limit. */
1633 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1634
1635 /* This is a limit in the driver and could be eliminated. */
1636 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1637
1638 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1639
1640 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1641
1642 disk->queue->queuedata = h;
1643
e1defc4f
MP		 1644 blk_queue_logical_block_size(disk->queue,
1645 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1646
1647 /* Make sure all queue data is written out before */
1648 /* setting h->drv[drv_index].queue, as setting this */
1649 /* allows the interrupt handler to start the queue */
1650 wmb();
1651 h->drv[drv_index].queue = disk->queue;
1652 add_disk(disk);
1653}
1654
ddd47442 1655/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1656 * If the usage_count is zero and it is a heretofore unknown drive, or,
1657 * the drive's capacity, geometry, or serial number has changed,
1658 * then the drive information will be updated and the disk will be
1659 * re-registered with the kernel. If these conditions don't hold,
1660 * then it will be left alone for the next reboot. The exception to this
1661 * is disk 0 which will always be left registered with the kernel since it
1662 * is also the controller node. Any changes to disk 0 will show up on
1663 * the next reboot.
7c832835 1664 */
6ae5ce8e 1665static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
7c832835 1666{
ddd47442
MM		 1667 ctlr_info_t *h = hba[ctlr];
1668 struct gendisk *disk;
ddd47442
MM		 1669 InquiryData_struct *inq_buff = NULL;
1670 unsigned int block_size;
00988a35 1671 sector_t total_size;
ddd47442
MM		 1672 unsigned long flags = 0;
1673 int ret = 0;
a72da29b 1674 drive_info_struct *drvinfo;
6ae5ce8e 1675 int was_only_controller_node;
a72da29b
MM		 1676
1677 /* Get information about the disk and modify the driver structure */
1678 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1679 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1680 if (inq_buff == NULL || drvinfo == NULL)
1681 goto mem_msg;
1682
6ae5ce8e
MM		 1683 /* See if we're trying to update the "controller node"
1684 * this will happen the when the first logical drive gets
1685 * created by ACU.
1686 */
1687 was_only_controller_node = (drv_index == 0 &&
1688 h->drv[0].raid_level == -1);
1689
a72da29b
MM		 1690 /* testing to see if 16-byte CDBs are already being used */
1691 if (h->cciss_read == CCISS_READ_16) {
1692 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1693 &total_size, &block_size);
1694
1695 } else {
1696 cciss_read_capacity(ctlr, drv_index, 1,
1697 &total_size, &block_size);
1698
1699 /* if read_capacity returns all F's this volume is >2TB */
1700 /* in size so we switch to 16-byte CDB's for all */
1701 /* read/write ops */
1702 if (total_size == 0xFFFFFFFFULL) {
1703 cciss_read_capacity_16(ctlr, drv_index, 1,
1704 &total_size, &block_size);
1705 h->cciss_read = CCISS_READ_16;
1706 h->cciss_write = CCISS_WRITE_16;
1707 } else {
1708 h->cciss_read = CCISS_READ_10;
1709 h->cciss_write = CCISS_WRITE_10;
1710 }
1711 }
1712
1713 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1714 inq_buff, drvinfo);
1715 drvinfo->block_size = block_size;
1716 drvinfo->nr_blocks = total_size + 1;
1717
7fe06326
AP		 1718 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1719 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1720 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1721 sizeof(drvinfo->serial_no));
1722
1723 /* Is it the same disk we already know, and nothing's changed? */
1724 if (h->drv[drv_index].raid_level != -1 &&
1725 ((memcmp(drvinfo->serial_no,
1726 h->drv[drv_index].serial_no, 16) == 0) &&
1727 drvinfo->block_size == h->drv[drv_index].block_size &&
1728 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1729 drvinfo->heads == h->drv[drv_index].heads &&
1730 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1731 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1732 /* The disk is unchanged, nothing to update */
1733 goto freeret;
a72da29b 1734
6ae5ce8e
MM		 1735 /* If we get here it's not the same disk, or something's changed,
1736 * so we need to * deregister it, and re-register it, if it's not
1737 * in use.
1738 * If the disk already exists then deregister it before proceeding
1739 * (unless it's the first disk (for the controller node).
1740 */
a72da29b
MM		 1741 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1742 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1743 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1744 h->drv[drv_index].busy_configuring = 1;
1745 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1746
6ae5ce8e
MM		 1747 /* deregister_disk sets h->drv[drv_index].queue = NULL
1748 * which keeps the interrupt handler from starting
1749 * the queue.
1750 */
a0ea8622 1751 ret = deregister_disk(h, drv_index, 0);
ddd47442
MM		 1752 h->drv[drv_index].busy_configuring = 0;
1753 }
1754
1755 /* If the disk is in use return */
1756 if (ret)
a72da29b
MM		 1757 goto freeret;
1758
6ae5ce8e
MM		 1759 /* Save the new information from cciss_geometry_inquiry
1760 * and serial number inquiry.
1761 */
a72da29b
MM		 1762 h->drv[drv_index].block_size = drvinfo->block_size;
1763 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1764 h->drv[drv_index].heads = drvinfo->heads;
1765 h->drv[drv_index].sectors = drvinfo->sectors;
1766 h->drv[drv_index].cylinders = drvinfo->cylinders;
1767 h->drv[drv_index].raid_level = drvinfo->raid_level;
1768 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1769 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1770 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1771 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1772
1773 ++h->num_luns;
1774 disk = h->gendisk[drv_index];
1775 set_capacity(disk, h->drv[drv_index].nr_blocks);
1776
6ae5ce8e
MM		 1777 /* If it's not disk 0 (drv_index != 0)
1778 * or if it was disk 0, but there was previously
1779 * no actual corresponding configured logical drive
1780 * (raid_leve == -1) then we want to update the
1781 * logical drive's information.
1782 */
1783 if (drv_index || first_time)
1784 cciss_add_disk(h, disk, drv_index);
ddd47442 1785
6ae5ce8e 1786freeret:
ddd47442 1787 kfree(inq_buff);
a72da29b 1788 kfree(drvinfo);
ddd47442 1789 return;
6ae5ce8e 1790mem_msg:
ddd47442
MM		 1791 printk(KERN_ERR "cciss: out of memory\n");
1792 goto freeret;
1793}
1794
1795/* This function will find the first index of the controllers drive array
1796 * that has a -1 for the raid_level and will return that index. This is
1797 * where new drives will be added. If the index to be returned is greater
1798 * than the highest_lun index for the controller then highest_lun is set
1799 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1800 * "controller_node" is used to know if this is a real logical drive, or just
1801 * the controller node, which determines if this counts towards highest_lun.
7c832835 1802 */
eece695f 1803static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1804{
1805 int i;
1806
7c832835
BH		 1807 for (i = 0; i < CISS_MAX_LUN; i++) {
1808 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1809 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1810 if (!controller_node)
1811 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1812 return i;
1813 }
1814 }
1815 return -1;
1816}
1817
6ae5ce8e
MM		 1818/* cciss_add_gendisk finds a free hba[]->drv structure
1819 * and allocates a gendisk if needed, and sets the lunid
1820 * in the drvinfo structure. It returns the index into
1821 * the ->drv[] array, or -1 if none are free.
1822 * is_controller_node indicates whether highest_lun should
1823 * count this disk, or if it's only being added to provide
1824 * a means to talk to the controller in case no logical
1825 * drives have yet been configured.
1826 */
eece695f 1827static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
6ae5ce8e
MM		 1828{
1829 int drv_index;
1830
eece695f 1831 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1832 if (drv_index == -1)
1833 return -1;
1834 /*Check if the gendisk needs to be allocated */
1835 if (!h->gendisk[drv_index]) {
1836 h->gendisk[drv_index] =
1837 alloc_disk(1 << NWD_SHIFT);
1838 if (!h->gendisk[drv_index]) {
1839 printk(KERN_ERR "cciss%d: could not "
1840 "allocate a new disk %d\n",
1841 h->ctlr, drv_index);
1842 return -1;
1843 }
1844 }
1845 h->drv[drv_index].LunID = lunid;
7fe06326
AP		 1846 if (cciss_create_ld_sysfs_entry(h, &h->drv[drv_index], drv_index))
1847 goto err_free_disk;
6ae5ce8e
MM		 1848
1849 /* Don't need to mark this busy because nobody */
1850 /* else knows about this disk yet to contend */
1851 /* for access to it. */
1852 h->drv[drv_index].busy_configuring = 0;
1853 wmb();
1854 return drv_index;
7fe06326
AP		 1855
1856err_free_disk:
1857 put_disk(h->gendisk[drv_index]);
1858 h->gendisk[drv_index] = NULL;
1859 return -1;
6ae5ce8e
MM		 1860}
1861
1862/* This is for the special case of a controller which
1863 * has no logical drives. In this case, we still need
1864 * to register a disk so the controller can be accessed
1865 * by the Array Config Utility.
1866 */
1867static void cciss_add_controller_node(ctlr_info_t *h)
1868{
1869 struct gendisk *disk;
1870 int drv_index;
1871
1872 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1873 return;
1874
eece695f 1875 drv_index = cciss_add_gendisk(h, 0, 1);
6ae5ce8e
MM		 1876 if (drv_index == -1) {
1877 printk(KERN_WARNING "cciss%d: could not "
1878 "add disk 0.\n", h->ctlr);
1879 return;
1880 }
1881 h->drv[drv_index].block_size = 512;
1882 h->drv[drv_index].nr_blocks = 0;
1883 h->drv[drv_index].heads = 0;
1884 h->drv[drv_index].sectors = 0;
1885 h->drv[drv_index].cylinders = 0;
1886 h->drv[drv_index].raid_level = -1;
1887 memset(h->drv[drv_index].serial_no, 0, 16);
1888 disk = h->gendisk[drv_index];
1889 cciss_add_disk(h, disk, drv_index);
1890}
1891
ddd47442 1892/* This function will add and remove logical drives from the Logical
d14c4ab5 1893 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 1894 * so that mount points are preserved until the next reboot. This allows
1895 * for the removal of logical drives in the middle of the drive array
1896 * without a re-ordering of those drives.
1897 * INPUT
1898 * h = The controller to perform the operations on
7c832835 1899 */
6ae5ce8e 1900static int rebuild_lun_table(ctlr_info_t *h, int first_time)
1da177e4 1901{
ddd47442
MM		 1902 int ctlr = h->ctlr;
1903 int num_luns;
1904 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 1905 int return_code;
1906 int listlength = 0;
1907 int i;
1908 int drv_found;
1909 int drv_index = 0;
1910 __u32 lunid = 0;
1da177e4 1911 unsigned long flags;
ddd47442 1912
6ae5ce8e
MM		 1913 if (!capable(CAP_SYS_RAWIO))
1914 return -EPERM;
1915
ddd47442
MM		 1916 /* Set busy_configuring flag for this operation */
1917 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 1918 if (h->busy_configuring) {
ddd47442
MM		 1919 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1920 return -EBUSY;
1921 }
1922 h->busy_configuring = 1;
a72da29b 1923 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 1924
a72da29b
MM		 1925 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1926 if (ld_buff == NULL)
1927 goto mem_msg;
1928
1929 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 1930 sizeof(ReportLunData_struct),
1931 0, CTLR_LUNID, TYPE_CMD);
ddd47442 1932
a72da29b
MM		 1933 if (return_code == IO_OK)
1934 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
1935 else { /* reading number of logical volumes failed */
1936 printk(KERN_WARNING "cciss: report logical volume"
1937 " command failed\n");
1938 listlength = 0;
1939 goto freeret;
1940 }
1941
1942 num_luns = listlength / 8; /* 8 bytes per entry */
1943 if (num_luns > CISS_MAX_LUN) {
1944 num_luns = CISS_MAX_LUN;
1945 printk(KERN_WARNING "cciss: more luns configured"
1946 " on controller than can be handled by"
1947 " this driver.\n");
1948 }
1949
6ae5ce8e
MM		 1950 if (num_luns == 0)
1951 cciss_add_controller_node(h);
1952
1953 /* Compare controller drive array to driver's drive array
1954 * to see if any drives are missing on the controller due
1955 * to action of Array Config Utility (user deletes drive)
1956 * and deregister logical drives which have disappeared.
1957 */
a72da29b
MM		 1958 for (i = 0; i <= h->highest_lun; i++) {
1959 int j;
1960 drv_found = 0;
d8a0be6a
SC		 1961
1962 /* skip holes in the array from already deleted drives */
1963 if (h->drv[i].raid_level == -1)
1964 continue;
1965
a72da29b
MM		 1966 for (j = 0; j < num_luns; j++) {
1967 memcpy(&lunid, &ld_buff->LUN[j][0], 4);
1968 lunid = le32_to_cpu(lunid);
1969 if (h->drv[i].LunID == lunid) {
1970 drv_found = 1;
1971 break;
1972 }
1973 }
1974 if (!drv_found) {
1975 /* Deregister it from the OS, it's gone. */
1976 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1977 h->drv[i].busy_configuring = 1;
1978 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
a0ea8622 1979 return_code = deregister_disk(h, i, 1);
7fe06326 1980 cciss_destroy_ld_sysfs_entry(&h->drv[i]);
a72da29b 1981 h->drv[i].busy_configuring = 0;
ddd47442 1982 }
a72da29b 1983 }
ddd47442 1984
a72da29b
MM		 1985 /* Compare controller drive array to driver's drive array.
1986 * Check for updates in the drive information and any new drives
1987 * on the controller due to ACU adding logical drives, or changing
1988 * a logical drive's size, etc. Reregister any new/changed drives
1989 */
1990 for (i = 0; i < num_luns; i++) {
1991 int j;
ddd47442 1992
a72da29b 1993 drv_found = 0;
ddd47442 1994
a72da29b
MM		 1995 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
1996 lunid = le32_to_cpu(lunid);
ddd47442 1997
a72da29b
MM		 1998 /* Find if the LUN is already in the drive array
1999 * of the driver. If so then update its info
2000 * if not in use. If it does not exist then find
2001 * the first free index and add it.
2002 */
2003 for (j = 0; j <= h->highest_lun; j++) {
2004 if (h->drv[j].raid_level != -1 &&
2005 h->drv[j].LunID == lunid) {
2006 drv_index = j;
2007 drv_found = 1;
2008 break;
ddd47442 2009 }
a72da29b 2010 }
ddd47442 2011
a72da29b
MM		 2012 /* check if the drive was found already in the array */
2013 if (!drv_found) {
eece695f 2014 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2015 if (drv_index == -1)
2016 goto freeret;
a72da29b 2017 }
6ae5ce8e 2018 cciss_update_drive_info(ctlr, drv_index, first_time);
a72da29b 2019 } /* end for */
ddd47442 2020
6ae5ce8e 2021freeret:
ddd47442
MM		 2022 kfree(ld_buff);
2023 h->busy_configuring = 0;
2024 /* We return -1 here to tell the ACU that we have registered/updated
2025 * all of the drives that we can and to keep it from calling us
2026 * additional times.
7c832835 2027 */
ddd47442 2028 return -1;
6ae5ce8e 2029mem_msg:
ddd47442 2030 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2031 h->busy_configuring = 0;
ddd47442
MM		 2032 goto freeret;
2033}
2034
2035/* This function will deregister the disk and it's queue from the
2036 * kernel. It must be called with the controller lock held and the
2037 * drv structures busy_configuring flag set. It's parameters are:
2038 *
2039 * disk = This is the disk to be deregistered
2040 * drv = This is the drive_info_struct associated with the disk to be
2041 * deregistered. It contains information about the disk used
2042 * by the driver.
2043 * clear_all = This flag determines whether or not the disk information
2044 * is going to be completely cleared out and the highest_lun
2045 * reset. Sometimes we want to clear out information about
d14c4ab5 2046 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2047 * the highest_lun should be left unchanged and the LunID
2048 * should not be cleared.
2049*/
a0ea8622 2050static int deregister_disk(ctlr_info_t *h, int drv_index,
ddd47442
MM		 2051 int clear_all)
2052{
799202cb 2053 int i;
a0ea8622
SC		 2054 struct gendisk *disk;
2055 drive_info_struct *drv;
1da177e4
LT		 2056
2057 if (!capable(CAP_SYS_RAWIO))
2058 return -EPERM;
2059
a0ea8622
SC		 2060 drv = &h->drv[drv_index];
2061 disk = h->gendisk[drv_index];
2062
1da177e4 2063 /* make sure logical volume is NOT is use */
7c832835
BH		 2064 if (clear_all || (h->gendisk[0] == disk)) {
2065 if (drv->usage_count > 1)
2066 return -EBUSY;
2067 } else if (drv->usage_count > 0)
2068 return -EBUSY;
1da177e4 2069
ddd47442
MM		 2070 /* invalidate the devices and deregister the disk. If it is disk
2071 * zero do not deregister it but just zero out it's values. This
2072 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2073 */
2074 if (h->gendisk[0] != disk) {
5a9df732
AB		 2075 struct request_queue *q = disk->queue;
2076 if (disk->flags & GENHD_FL_UP)
2077 del_gendisk(disk);
2078 if (q) {
2079 blk_cleanup_queue(q);
2080 /* Set drv->queue to NULL so that we do not try
2081 * to call blk_start_queue on this queue in the
2082 * interrupt handler
2083 */
2084 drv->queue = NULL;
2085 }
2086 /* If clear_all is set then we are deleting the logical
2087 * drive, not just refreshing its info. For drives
2088 * other than disk 0 we will call put_disk. We do not
2089 * do this for disk 0 as we need it to be able to
2090 * configure the controller.
a72da29b 2091 */
5a9df732
AB		 2092 if (clear_all){
2093 /* This isn't pretty, but we need to find the
2094 * disk in our array and NULL our the pointer.
2095 * This is so that we will call alloc_disk if
2096 * this index is used again later.
a72da29b 2097 */
5a9df732 2098 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2099 if (h->gendisk[i] == disk) {
5a9df732
AB		 2100 h->gendisk[i] = NULL;
2101 break;
799202cb 2102 }
799202cb 2103 }
5a9df732 2104 put_disk(disk);
ddd47442 2105 }
799202cb
MM		 2106 } else {
2107 set_capacity(disk, 0);
ddd47442
MM		 2108 }
2109
2110 --h->num_luns;
2111 /* zero out the disk size info */
2112 drv->nr_blocks = 0;
2113 drv->block_size = 0;
2114 drv->heads = 0;
2115 drv->sectors = 0;
2116 drv->cylinders = 0;
2117 drv->raid_level = -1; /* This can be used as a flag variable to
2118 * indicate that this element of the drive
2119 * array is free.
7c832835
BH		 2120 */
2121
2122 if (clear_all) {
2123 /* check to see if it was the last disk */
2124 if (drv == h->drv + h->highest_lun) {
2125 /* if so, find the new hightest lun */
2126 int i, newhighest = -1;
a72da29b 2127 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2128 /* if the disk has size > 0, it is available */
ddd47442 2129 if (h->drv[i].heads)
7c832835
BH		 2130 newhighest = i;
2131 }
2132 h->highest_lun = newhighest;
1da177e4 2133 }
ddd47442 2134
7c832835 2135 drv->LunID = 0;
ddd47442 2136 }
e2019b58 2137 return 0;
1da177e4 2138}
ddd47442 2139
b57695fe 2140static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2141 size_t size, __u8 page_code, unsigned char *scsi3addr,
2142 int cmd_type)
1da177e4 2143{
7c832835 2144 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2145 u64bit buff_dma_handle;
2146 int status = IO_OK;
2147
2148 c->cmd_type = CMD_IOCTL_PEND;
2149 c->Header.ReplyQueue = 0;
7c832835 2150 if (buff != NULL) {
1da177e4 2151 c->Header.SGList = 1;
7c832835 2152 c->Header.SGTotal = 1;
1da177e4
LT		 2153 } else {
2154 c->Header.SGList = 0;
7c832835 2155 c->Header.SGTotal = 0;
1da177e4
LT		 2156 }
2157 c->Header.Tag.lower = c->busaddr;
b57695fe 2158 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2159
2160 c->Request.Type.Type = cmd_type;
2161 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2162 switch (cmd) {
2163 case CISS_INQUIRY:
1da177e4 2164 /* are we trying to read a vital product page */
7c832835 2165 if (page_code != 0) {
1da177e4
LT		 2166 c->Request.CDB[1] = 0x01;
2167 c->Request.CDB[2] = page_code;
2168 }
2169 c->Request.CDBLen = 6;
7c832835 2170 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2171 c->Request.Type.Direction = XFER_READ;
2172 c->Request.Timeout = 0;
7c832835
BH		 2173 c->Request.CDB[0] = CISS_INQUIRY;
2174 c->Request.CDB[4] = size & 0xFF;
2175 break;
1da177e4
LT		 2176 case CISS_REPORT_LOG:
2177 case CISS_REPORT_PHYS:
7c832835 2178 /* Talking to controller so It's a physical command
1da177e4 2179 mode = 00 target = 0. Nothing to write.
7c832835 2180 */
1da177e4
LT		 2181 c->Request.CDBLen = 12;
2182 c->Request.Type.Attribute = ATTR_SIMPLE;
2183 c->Request.Type.Direction = XFER_READ;
2184 c->Request.Timeout = 0;
2185 c->Request.CDB[0] = cmd;
7c832835 2186 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2187 c->Request.CDB[7] = (size >> 16) & 0xFF;
2188 c->Request.CDB[8] = (size >> 8) & 0xFF;
2189 c->Request.CDB[9] = size & 0xFF;
2190 break;
2191
2192 case CCISS_READ_CAPACITY:
1da177e4
LT		 2193 c->Request.CDBLen = 10;
2194 c->Request.Type.Attribute = ATTR_SIMPLE;
2195 c->Request.Type.Direction = XFER_READ;
2196 c->Request.Timeout = 0;
2197 c->Request.CDB[0] = cmd;
7c832835 2198 break;
00988a35 2199 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2200 c->Request.CDBLen = 16;
2201 c->Request.Type.Attribute = ATTR_SIMPLE;
2202 c->Request.Type.Direction = XFER_READ;
2203 c->Request.Timeout = 0;
2204 c->Request.CDB[0] = cmd;
2205 c->Request.CDB[1] = 0x10;
2206 c->Request.CDB[10] = (size >> 24) & 0xFF;
2207 c->Request.CDB[11] = (size >> 16) & 0xFF;
2208 c->Request.CDB[12] = (size >> 8) & 0xFF;
2209 c->Request.CDB[13] = size & 0xFF;
2210 c->Request.Timeout = 0;
2211 c->Request.CDB[0] = cmd;
2212 break;
1da177e4
LT		 2213 case CCISS_CACHE_FLUSH:
2214 c->Request.CDBLen = 12;
2215 c->Request.Type.Attribute = ATTR_SIMPLE;
2216 c->Request.Type.Direction = XFER_WRITE;
2217 c->Request.Timeout = 0;
2218 c->Request.CDB[0] = BMIC_WRITE;
2219 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2220 break;
88f627ae 2221 case TEST_UNIT_READY:
88f627ae
SC		 2222 c->Request.CDBLen = 6;
2223 c->Request.Type.Attribute = ATTR_SIMPLE;
2224 c->Request.Type.Direction = XFER_NONE;
2225 c->Request.Timeout = 0;
2226 break;
1da177e4
LT		 2227 default:
2228 printk(KERN_WARNING
7c832835 2229 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2230 return IO_ERROR;
1da177e4
LT		 2231 }
2232 } else if (cmd_type == TYPE_MSG) {
2233 switch (cmd) {
7c832835 2234 case 0: /* ABORT message */
3da8b713 2235 c->Request.CDBLen = 12;
2236 c->Request.Type.Attribute = ATTR_SIMPLE;
2237 c->Request.Type.Direction = XFER_WRITE;
2238 c->Request.Timeout = 0;
7c832835
BH		 2239 c->Request.CDB[0] = cmd; /* abort */
2240 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2241 /* buff contains the tag of the command to abort */
2242 memcpy(&c->Request.CDB[4], buff, 8);
2243 break;
7c832835 2244 case 1: /* RESET message */
88f627ae 2245 c->Request.CDBLen = 16;
3da8b713 2246 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2247 c->Request.Type.Direction = XFER_NONE;
3da8b713 2248 c->Request.Timeout = 0;
2249 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2250 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2251 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2252 break;
1da177e4
LT		 2253 case 3: /* No-Op message */
2254 c->Request.CDBLen = 1;
2255 c->Request.Type.Attribute = ATTR_SIMPLE;
2256 c->Request.Type.Direction = XFER_WRITE;
2257 c->Request.Timeout = 0;
2258 c->Request.CDB[0] = cmd;
2259 break;
2260 default:
2261 printk(KERN_WARNING
7c832835 2262 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2263 return IO_ERROR;
2264 }
2265 } else {
2266 printk(KERN_WARNING
7c832835 2267 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2268 return IO_ERROR;
2269 }
2270 /* Fill in the scatter gather information */
2271 if (size > 0) {
2272 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2273 buff, size,
2274 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2275 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2276 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2277 c->SG[0].Len = size;
7c832835 2278 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2279 }
2280 return status;
2281}
7c832835 2282
3c2ab402 2283static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2284{
2285 switch (c->err_info->ScsiStatus) {
2286 case SAM_STAT_GOOD:
2287 return IO_OK;
2288 case SAM_STAT_CHECK_CONDITION:
2289 switch (0xf & c->err_info->SenseInfo[2]) {
2290 case 0: return IO_OK; /* no sense */
2291 case 1: return IO_OK; /* recovered error */
2292 default:
2293 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2294 "check condition, sense key = 0x%02x\n",
2295 h->ctlr, c->Request.CDB[0],
2296 c->err_info->SenseInfo[2]);
2297 }
2298 break;
2299 default:
2300 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2301 "scsi status = 0x%02x\n", h->ctlr,
2302 c->Request.CDB[0], c->err_info->ScsiStatus);
2303 break;
2304 }
2305 return IO_ERROR;
2306}
2307
789a424a 2308static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2309{
5390cfc3 2310 int return_status = IO_OK;
7c832835 2311
789a424a 2312 if (c->err_info->CommandStatus == CMD_SUCCESS)
2313 return IO_OK;
5390cfc3 2314
2315 switch (c->err_info->CommandStatus) {
2316 case CMD_TARGET_STATUS:
3c2ab402 2317 return_status = check_target_status(h, c);
5390cfc3 2318 break;
2319 case CMD_DATA_UNDERRUN:
2320 case CMD_DATA_OVERRUN:
2321 /* expected for inquiry and report lun commands */
2322 break;
2323 case CMD_INVALID:
789a424a 2324 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2325 "reported invalid\n", c->Request.CDB[0]);
2326 return_status = IO_ERROR;
2327 break;
2328 case CMD_PROTOCOL_ERR:
2329 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2330 "protocol error \n", c->Request.CDB[0]);
2331 return_status = IO_ERROR;
2332 break;
2333 case CMD_HARDWARE_ERR:
2334 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2335 " hardware error\n", c->Request.CDB[0]);
2336 return_status = IO_ERROR;
2337 break;
2338 case CMD_CONNECTION_LOST:
2339 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2340 "connection lost\n", c->Request.CDB[0]);
2341 return_status = IO_ERROR;
2342 break;
2343 case CMD_ABORTED:
2344 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2345 "aborted\n", c->Request.CDB[0]);
2346 return_status = IO_ERROR;
2347 break;
2348 case CMD_ABORT_FAILED:
2349 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2350 "abort failed\n", c->Request.CDB[0]);
2351 return_status = IO_ERROR;
2352 break;
2353 case CMD_UNSOLICITED_ABORT:
2354 printk(KERN_WARNING
2355 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2356 c->Request.CDB[0]);
789a424a 2357 return_status = IO_NEEDS_RETRY;
5390cfc3 2358 break;
2359 default:
2360 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2361 "unknown status %x\n", c->Request.CDB[0],
2362 c->err_info->CommandStatus);
2363 return_status = IO_ERROR;
7c832835 2364 }
789a424a 2365 return return_status;
2366}
2367
2368static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2369 int attempt_retry)
2370{
2371 DECLARE_COMPLETION_ONSTACK(wait);
2372 u64bit buff_dma_handle;
2373 unsigned long flags;
2374 int return_status = IO_OK;
2375
2376resend_cmd2:
2377 c->waiting = &wait;
2378 /* Put the request on the tail of the queue and send it */
2379 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2380 addQ(&h->reqQ, c);
2381 h->Qdepth++;
2382 start_io(h);
2383 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2384
2385 wait_for_completion(&wait);
2386
2387 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2388 goto command_done;
2389
2390 return_status = process_sendcmd_error(h, c);
2391
2392 if (return_status == IO_NEEDS_RETRY &&
2393 c->retry_count < MAX_CMD_RETRIES) {
2394 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2395 c->Request.CDB[0]);
2396 c->retry_count++;
2397 /* erase the old error information */
2398 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2399 return_status = IO_OK;
2400 INIT_COMPLETION(wait);
2401 goto resend_cmd2;
2402 }
5390cfc3 2403
2404command_done:
1da177e4 2405 /* unlock the buffers from DMA */
bb2a37bf
MM		 2406 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2407 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2408 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2409 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2410 return return_status;
2411}
2412
b57695fe 2413static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2414 __u8 page_code, unsigned char scsi3addr[],
2415 int cmd_type)
5390cfc3 2416{
2417 ctlr_info_t *h = hba[ctlr];
2418 CommandList_struct *c;
2419 int return_status;
2420
2421 c = cmd_alloc(h, 0);
2422 if (!c)
2423 return -ENOMEM;
b57695fe 2424 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2425 scsi3addr, cmd_type);
5390cfc3 2426 if (return_status == IO_OK)
789a424a 2427 return_status = sendcmd_withirq_core(h, c, 1);
2428
1da177e4 2429 cmd_free(h, c, 0);
7c832835 2430 return return_status;
1da177e4 2431}
7c832835 2432
1da177e4 2433static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2434 int withirq, sector_t total_size,
7c832835
BH		 2435 unsigned int block_size,
2436 InquiryData_struct *inq_buff,
2437 drive_info_struct *drv)
1da177e4
LT		 2438{
2439 int return_code;
00988a35 2440 unsigned long t;
b57695fe 2441 unsigned char scsi3addr[8];
00988a35 2442
1da177e4 2443 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2444 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2445 if (withirq)
2446 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2447 inq_buff, sizeof(*inq_buff),
2448 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2449 else
2450 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2451 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2452 TYPE_CMD);
1da177e4 2453 if (return_code == IO_OK) {
7c832835 2454 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2455 printk(KERN_WARNING
7c832835
BH		 2456 "cciss: reading geometry failed, volume "
2457 "does not support reading geometry\n");
1da177e4 2458 drv->heads = 255;
7c832835 2459 drv->sectors = 32; // Sectors per track
7f42d3b8 2460 drv->cylinders = total_size + 1;
89f97ad1 2461 drv->raid_level = RAID_UNKNOWN;
1da177e4 2462 } else {
1da177e4
LT		 2463 drv->heads = inq_buff->data_byte[6];
2464 drv->sectors = inq_buff->data_byte[7];
2465 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2466 drv->cylinders += inq_buff->data_byte[5];
2467 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2468 }
2469 drv->block_size = block_size;
97c06978 2470 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2471 t = drv->heads * drv->sectors;
2472 if (t > 1) {
97c06978
MMOD		 2473 sector_t real_size = total_size + 1;
2474 unsigned long rem = sector_div(real_size, t);
3f7705ea 2475 if (rem)
97c06978
MMOD		 2476 real_size++;
2477 drv->cylinders = real_size;
1da177e4 2478 }
7c832835 2479 } else { /* Get geometry failed */
1da177e4
LT		 2480 printk(KERN_WARNING "cciss: reading geometry failed\n");
2481 }
cc088d10 2482 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
7c832835 2483 drv->heads, drv->sectors, drv->cylinders);
1da177e4 2484}
7c832835 2485
1da177e4 2486static void
00988a35 2487cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2488 unsigned int *block_size)
1da177e4 2489{
00988a35 2490 ReadCapdata_struct *buf;
1da177e4 2491 int return_code;
b57695fe 2492 unsigned char scsi3addr[8];
1aebe187
MK		 2493
2494 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2495 if (!buf) {
00988a35
MMOD		 2496 printk(KERN_WARNING "cciss: out of memory\n");
2497 return;
2498 }
1aebe187 2499
b57695fe 2500 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2501 if (withirq)
2502 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2503 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2504 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2505 else
2506 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2507 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2508 0, scsi3addr, TYPE_CMD);
1da177e4 2509 if (return_code == IO_OK) {
4c1f2b31
AV		 2510 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2511 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2512 } else { /* read capacity command failed */
1da177e4
LT		 2513 printk(KERN_WARNING "cciss: read capacity failed\n");
2514 *total_size = 0;
2515 *block_size = BLOCK_SIZE;
2516 }
97c06978 2517 if (*total_size != 0)
7b92aadf 2518 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2519 (unsigned long long)*total_size+1, *block_size);
00988a35 2520 kfree(buf);
00988a35
MMOD		 2521}
2522
2523static void
2524cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2525{
2526 ReadCapdata_struct_16 *buf;
2527 int return_code;
b57695fe 2528 unsigned char scsi3addr[8];
1aebe187
MK		 2529
2530 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2531 if (!buf) {
00988a35
MMOD		 2532 printk(KERN_WARNING "cciss: out of memory\n");
2533 return;
2534 }
1aebe187 2535
b57695fe 2536 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2537 if (withirq) {
2538 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2539 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2540 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2541 }
2542 else {
2543 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2544 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2545 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2546 }
2547 if (return_code == IO_OK) {
4c1f2b31
AV		 2548 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2549 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2550 } else { /* read capacity command failed */
2551 printk(KERN_WARNING "cciss: read capacity failed\n");
2552 *total_size = 0;
2553 *block_size = BLOCK_SIZE;
2554 }
7b92aadf 2555 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2556 (unsigned long long)*total_size+1, *block_size);
00988a35 2557 kfree(buf);
1da177e4
LT		 2558}
2559
1da177e4
LT		 2560static int cciss_revalidate(struct gendisk *disk)
2561{
2562 ctlr_info_t *h = get_host(disk);
2563 drive_info_struct *drv = get_drv(disk);
2564 int logvol;
7c832835 2565 int FOUND = 0;
1da177e4 2566 unsigned int block_size;
00988a35 2567 sector_t total_size;
1da177e4
LT		 2568 InquiryData_struct *inq_buff = NULL;
2569
7c832835
BH		 2570 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2571 if (h->drv[logvol].LunID == drv->LunID) {
2572 FOUND = 1;
1da177e4
LT		 2573 break;
2574 }
2575 }
2576
7c832835
BH		 2577 if (!FOUND)
2578 return 1;
1da177e4 2579
7c832835
BH		 2580 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2581 if (inq_buff == NULL) {
2582 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2583 return 1;
2584 }
00988a35
MMOD		 2585 if (h->cciss_read == CCISS_READ_10) {
2586 cciss_read_capacity(h->ctlr, logvol, 1,
2587 &total_size, &block_size);
2588 } else {
2589 cciss_read_capacity_16(h->ctlr, logvol, 1,
2590 &total_size, &block_size);
2591 }
7c832835
BH		 2592 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2593 inq_buff, drv);
1da177e4 2594
e1defc4f 2595 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2596 set_capacity(disk, drv->nr_blocks);
2597
1da177e4
LT		 2598 kfree(inq_buff);
2599 return 0;
2600}
2601
2602/*
2603 * Wait polling for a command to complete.
2604 * The memory mapped FIFO is polled for the completion.
2605 * Used only at init time, interrupts from the HBA are disabled.
2606 */
2607static unsigned long pollcomplete(int ctlr)
2608{
2609 unsigned long done;
2610 int i;
2611
2612 /* Wait (up to 20 seconds) for a command to complete */
2613
2614 for (i = 20 * HZ; i > 0; i--) {
2615 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2616 if (done == FIFO_EMPTY)
2617 schedule_timeout_uninterruptible(1);
2618 else
e2019b58 2619 return done;
1da177e4
LT		 2620 }
2621 /* Invalid address to tell caller we ran out of time */
2622 return 1;
2623}
3da8b713 2624
4a4b2d76
SC		 2625/* Send command c to controller h and poll for it to complete.
2626 * Turns interrupts off on the board. Used at driver init time
2627 * and during SCSI error recovery.
1da177e4 2628 */
4a4b2d76 2629static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2630{
1da177e4
LT		 2631 int i;
2632 unsigned long complete;
4a4b2d76 2633 int status = IO_ERROR;
1da177e4 2634 u64bit buff_dma_handle;
1da177e4 2635
4a4b2d76
SC		 2636resend_cmd1:
2637
2638 /* Disable interrupt on the board. */
2639 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2640
1da177e4 2641 /* Make sure there is room in the command FIFO */
7c832835 2642 /* Actually it should be completely empty at this time */
3da8b713 2643 /* unless we are in here doing error handling for the scsi */
2644 /* tape side of the driver. */
7c832835 2645 for (i = 200000; i > 0; i--) {
1da177e4 2646 /* if fifo isn't full go */
4a4b2d76 2647 if (!(h->access.fifo_full(h)))
7c832835 2648 break;
7c832835
BH		 2649 udelay(10);
2650 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2651 " waiting!\n", h->ctlr);
7c832835 2652 }
4a4b2d76 2653 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2654 do {
4a4b2d76 2655 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2656
2657#ifdef CCISS_DEBUG
3da8b713 2658 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2659#endif /* CCISS_DEBUG */
1da177e4 2660
3da8b713 2661 if (complete == 1) {
7c832835
BH		 2662 printk(KERN_WARNING
2663 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2664 "No command list address returned!\n", h->ctlr);
3da8b713 2665 status = IO_ERROR;
3da8b713 2666 break;
2667 }
2668
72f9f132 2669 /* Make sure it's the command we're expecting. */
4a4b2d76 2670 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2671 printk(KERN_WARNING "cciss%d: Unexpected command "
2672 "completion.\n", h->ctlr);
4a4b2d76
SC		 2673 continue;
2674 }
2675
2676 /* It is our command. If no error, we're done. */
2677 if (!(complete & CISS_ERROR_BIT)) {
2678 status = IO_OK;
2679 break;
2680 }
2681
2682 /* There is an error... */
2683
2684 /* if data overrun or underun on Report command ignore it */
2685 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2686 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2687 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2688 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2689 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2690 complete = c->busaddr;
2691 status = IO_OK;
2692 break;
1da177e4 2693 }
4a4b2d76
SC		 2694
2695 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2696 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2697 h->ctlr, c);
2698 if (c->retry_count < MAX_CMD_RETRIES) {
2699 printk(KERN_WARNING "cciss%d: retrying %p\n",
2700 h->ctlr, c);
2701 c->retry_count++;
2702 /* erase the old error information */
2703 memset(c->err_info, 0, sizeof(c->err_info));
2704 goto resend_cmd1;
3da8b713 2705 }
4a4b2d76
SC		 2706 printk(KERN_WARNING "cciss%d: retried %p too many "
2707 "times\n", h->ctlr, c);
2708 status = IO_ERROR;
3c2ab402 2709 break;
4a4b2d76
SC		 2710 }
2711
2712 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2713 printk(KERN_WARNING "cciss%d: command could not be "
2714 "aborted.\n", h->ctlr);
2715 status = IO_ERROR;
3c2ab402 2716 break;
4a4b2d76
SC		 2717 }
2718
4a4b2d76 2719 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2720 status = check_target_status(h, c);
2721 break;
4a4b2d76
SC		 2722 }
2723
3c2ab402 2724 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2725 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2726 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2727 status = IO_ERROR;
3c2ab402 2728 break;
4a4b2d76
SC		 2729
2730 } while (1);
7c832835 2731
1da177e4 2732 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2733 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2734 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2735 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2736 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2737 return status;
2738}
2739
2740/*
2741 * Send a command to the controller, and wait for it to complete.
2742 * Used at init time, and during SCSI error recovery.
2743 */
2744static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2745 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2746{
2747 CommandList_struct *c;
2748 int status;
2749
2750 c = cmd_alloc(hba[ctlr], 1);
2751 if (!c) {
2752 printk(KERN_WARNING "cciss: unable to get memory");
2753 return IO_ERROR;
2754 }
b57695fe 2755 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2756 scsi3addr, cmd_type);
4a4b2d76
SC		 2757 if (status == IO_OK)
2758 status = sendcmd_core(hba[ctlr], c);
2759 cmd_free(hba[ctlr], c, 1);
e2019b58 2760 return status;
7c832835
BH		 2761}
2762
1da177e4
LT		 2763/*
2764 * Map (physical) PCI mem into (virtual) kernel space
2765 */
2766static void __iomem *remap_pci_mem(ulong base, ulong size)
2767{
7c832835
BH		 2768 ulong page_base = ((ulong) base) & PAGE_MASK;
2769 ulong page_offs = ((ulong) base) - page_base;
2770 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2771
7c832835 2772 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2773}
2774
7c832835
BH		 2775/*
2776 * Takes jobs of the Q and sends them to the hardware, then puts it on
2777 * the Q to wait for completion.
2778 */
2779static void start_io(ctlr_info_t *h)
1da177e4
LT		 2780{
2781 CommandList_struct *c;
7c832835 2782
8a3173de
JA		 2783 while (!hlist_empty(&h->reqQ)) {
2784 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2785 /* can't do anything if fifo is full */
2786 if ((h->access.fifo_full(h))) {
2787 printk(KERN_WARNING "cciss: fifo full\n");
2788 break;
2789 }
2790
7c832835 2791 /* Get the first entry from the Request Q */
8a3173de 2792 removeQ(c);
1da177e4 2793 h->Qdepth--;
7c832835
BH		 2794
2795 /* Tell the controller execute command */
1da177e4 2796 h->access.submit_command(h, c);
7c832835
BH		 2797
2798 /* Put job onto the completed Q */
8a3173de 2799 addQ(&h->cmpQ, c);
1da177e4
LT		 2800 }
2801}
7c832835 2802
1da177e4
LT		 2803/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2804/* Zeros out the error record and then resends the command back */
2805/* to the controller */
7c832835 2806static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2807{
2808 /* erase the old error information */
2809 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2810
2811 /* add it to software queue and then send it to the controller */
8a3173de 2812 addQ(&h->reqQ, c);
1da177e4 2813 h->Qdepth++;
7c832835 2814 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2815 h->maxQsinceinit = h->Qdepth;
2816
2817 start_io(h);
2818}
a9925a06 2819
1a614f50
SC		 2820static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2821 unsigned int msg_byte, unsigned int host_byte,
2822 unsigned int driver_byte)
2823{
2824 /* inverse of macros in scsi.h */
2825 return (scsi_status_byte & 0xff) |
2826 ((msg_byte & 0xff) << 8) |
2827 ((host_byte & 0xff) << 16) |
2828 ((driver_byte & 0xff) << 24);
2829}
2830
0a9279cc
MM		 2831static inline int evaluate_target_status(ctlr_info_t *h,
2832 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2833{
2834 unsigned char sense_key;
1a614f50
SC		 2835 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2836 int error_value;
2837
0a9279cc 2838 *retry_cmd = 0;
1a614f50
SC		 2839 /* If we get in here, it means we got "target status", that is, scsi status */
2840 status_byte = cmd->err_info->ScsiStatus;
2841 driver_byte = DRIVER_OK;
2842 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2843
2844 if (blk_pc_request(cmd->rq))
2845 host_byte = DID_PASSTHROUGH;
2846 else
2847 host_byte = DID_OK;
2848
2849 error_value = make_status_bytes(status_byte, msg_byte,
2850 host_byte, driver_byte);
03bbfee5 2851
1a614f50 2852 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2853 if (!blk_pc_request(cmd->rq))
2854 printk(KERN_WARNING "cciss: cmd %p "
2855 "has SCSI Status 0x%x\n",
2856 cmd, cmd->err_info->ScsiStatus);
1a614f50 2857 return error_value;
03bbfee5
MMOD		 2858 }
2859
2860 /* check the sense key */
2861 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2862 /* no status or recovered error */
1a614f50
SC		 2863 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2864 error_value = 0;
03bbfee5 2865
0a9279cc
MM		 2866 if (check_for_unit_attention(h, cmd)) {
2867 *retry_cmd = !blk_pc_request(cmd->rq);
2868 return 0;
2869 }
2870
03bbfee5 2871 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2872 if (error_value != 0)
03bbfee5
MMOD		 2873 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2874 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2875 return error_value;
03bbfee5
MMOD		 2876 }
2877
2878 /* SG_IO or similar, copy sense data back */
2879 if (cmd->rq->sense) {
2880 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2881 cmd->rq->sense_len = cmd->err_info->SenseLen;
2882 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2883 cmd->rq->sense_len);
2884 } else
2885 cmd->rq->sense_len = 0;
2886
1a614f50 2887 return error_value;
03bbfee5
MMOD		 2888}
2889
7c832835 2890/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 2891 * buffers for the completed job. Note that this function does not need
2892 * to hold the hba/queue lock.
7c832835
BH		 2893 */
2894static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2895 int timeout)
1da177e4 2896{
1da177e4 2897 int retry_cmd = 0;
198b7660
MMOD		 2898 struct request *rq = cmd->rq;
2899
2900 rq->errors = 0;
7c832835 2901
1da177e4 2902 if (timeout)
1a614f50 2903 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 2904
d38ae168
MMOD		 2905 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2906 goto after_error_processing;
7c832835 2907
d38ae168 2908 switch (cmd->err_info->CommandStatus) {
d38ae168 2909 case CMD_TARGET_STATUS:
0a9279cc 2910 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 2911 break;
2912 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 2913 if (blk_fs_request(cmd->rq)) {
2914 printk(KERN_WARNING "cciss: cmd %p has"
2915 " completed with data underrun "
2916 "reported\n", cmd);
c3a4d78c 2917 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 2918 }
d38ae168
MMOD		 2919 break;
2920 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 2921 if (blk_fs_request(cmd->rq))
2922 printk(KERN_WARNING "cciss: cmd %p has"
2923 " completed with data overrun "
2924 "reported\n", cmd);
d38ae168
MMOD		 2925 break;
2926 case CMD_INVALID:
2927 printk(KERN_WARNING "cciss: cmd %p is "
2928 "reported invalid\n", cmd);
1a614f50
SC		 2929 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2930 cmd->err_info->CommandStatus, DRIVER_OK,
2931 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2932 break;
2933 case CMD_PROTOCOL_ERR:
2934 printk(KERN_WARNING "cciss: cmd %p has "
2935 "protocol error \n", cmd);
1a614f50
SC		 2936 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2937 cmd->err_info->CommandStatus, DRIVER_OK,
2938 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2939 break;
2940 case CMD_HARDWARE_ERR:
2941 printk(KERN_WARNING "cciss: cmd %p had "
2942 " hardware error\n", cmd);
1a614f50
SC		 2943 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2944 cmd->err_info->CommandStatus, DRIVER_OK,
2945 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2946 break;
2947 case CMD_CONNECTION_LOST:
2948 printk(KERN_WARNING "cciss: cmd %p had "
2949 "connection lost\n", cmd);
1a614f50
SC		 2950 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2951 cmd->err_info->CommandStatus, DRIVER_OK,
2952 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2953 break;
2954 case CMD_ABORTED:
2955 printk(KERN_WARNING "cciss: cmd %p was "
2956 "aborted\n", cmd);
1a614f50
SC		 2957 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2958 cmd->err_info->CommandStatus, DRIVER_OK,
2959 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 2960 break;
2961 case CMD_ABORT_FAILED:
2962 printk(KERN_WARNING "cciss: cmd %p reports "
2963 "abort failed\n", cmd);
1a614f50
SC		 2964 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2965 cmd->err_info->CommandStatus, DRIVER_OK,
2966 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2967 break;
2968 case CMD_UNSOLICITED_ABORT:
2969 printk(KERN_WARNING "cciss%d: unsolicited "
2970 "abort %p\n", h->ctlr, cmd);
2971 if (cmd->retry_count < MAX_CMD_RETRIES) {
2972 retry_cmd = 1;
2973 printk(KERN_WARNING
2974 "cciss%d: retrying %p\n", h->ctlr, cmd);
2975 cmd->retry_count++;
2976 } else
2977 printk(KERN_WARNING
2978 "cciss%d: %p retried too "
2979 "many times\n", h->ctlr, cmd);
1a614f50
SC		 2980 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2981 cmd->err_info->CommandStatus, DRIVER_OK,
2982 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 2983 break;
2984 case CMD_TIMEOUT:
2985 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 2986 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2987 cmd->err_info->CommandStatus, DRIVER_OK,
2988 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2989 break;
2990 default:
2991 printk(KERN_WARNING "cciss: cmd %p returned "
2992 "unknown status %x\n", cmd,
2993 cmd->err_info->CommandStatus);
1a614f50
SC		 2994 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2995 cmd->err_info->CommandStatus, DRIVER_OK,
2996 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 2997 }
d38ae168
MMOD		 2998
2999after_error_processing:
3000
1da177e4 3001 /* We need to return this command */
7c832835
BH		 3002 if (retry_cmd) {
3003 resend_cciss_cmd(h, cmd);
1da177e4 3004 return;
7c832835 3005 }
03bbfee5 3006 cmd->rq->completion_data = cmd;
a9925a06 3007 blk_complete_request(cmd->rq);
1da177e4
LT		 3008}
3009
7c832835
BH		 3010/*
3011 * Get a request and submit it to the controller.
1da177e4 3012 */
165125e1 3013static void do_cciss_request(struct request_queue *q)
1da177e4 3014{
7c832835 3015 ctlr_info_t *h = q->queuedata;
1da177e4 3016 CommandList_struct *c;
00988a35
MMOD		 3017 sector_t start_blk;
3018 int seg;
1da177e4
LT		 3019 struct request *creq;
3020 u64bit temp64;
3021 struct scatterlist tmp_sg[MAXSGENTRIES];
3022 drive_info_struct *drv;
3023 int i, dir;
3024
3025 /* We call start_io here in case there is a command waiting on the
3026 * queue that has not been sent.
7c832835 3027 */
1da177e4
LT		 3028 if (blk_queue_plugged(q))
3029 goto startio;
3030
7c832835 3031 queue:
9934c8c0 3032 creq = blk_peek_request(q);
1da177e4
LT		 3033 if (!creq)
3034 goto startio;
3035
089fe1b2 3036 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3037
7c832835 3038 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3039 goto full;
3040
9934c8c0 3041 blk_start_request(creq);
1da177e4
LT		 3042
3043 spin_unlock_irq(q->queue_lock);
3044
3045 c->cmd_type = CMD_RWREQ;
3046 c->rq = creq;
7c832835
BH		 3047
3048 /* fill in the request */
1da177e4 3049 drv = creq->rq_disk->private_data;
7c832835 3050 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3051 /* got command from pool, so use the command block index instead */
3052 /* for direct lookups. */
3053 /* The first 2 bits are reserved for controller error reporting. */
3054 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835
BH		 3055 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
3056 c->Header.LUN.LogDev.VolId = drv->LunID;
1da177e4 3057 c->Header.LUN.LogDev.Mode = 1;
7c832835
BH		 3058 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3059 c->Request.Type.Type = TYPE_CMD; // It is a command.
3060 c->Request.Type.Attribute = ATTR_SIMPLE;
3061 c->Request.Type.Direction =
a52de245 3062 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3063 c->Request.Timeout = 0; // Don't time out
3064 c->Request.CDB[0] =
00988a35 3065 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3066 start_blk = blk_rq_pos(creq);
1da177e4 3067#ifdef CCISS_DEBUG
83096ebf
TH		 3068 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3069 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3070#endif /* CCISS_DEBUG */
1da177e4 3071
45711f1a 3072 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3073 seg = blk_rq_map_sg(q, creq, tmp_sg);
3074
7c832835 3075 /* get the DMA records for the setup */
1da177e4
LT		 3076 if (c->Request.Type.Direction == XFER_READ)
3077 dir = PCI_DMA_FROMDEVICE;
3078 else
3079 dir = PCI_DMA_TODEVICE;
3080
7c832835 3081 for (i = 0; i < seg; i++) {
1da177e4 3082 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3083 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3084 tmp_sg[i].offset,
3085 tmp_sg[i].length, dir);
1da177e4 3086 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3087 c->SG[i].Addr.upper = temp64.val32.upper;
3088 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3089 }
7c832835
BH		 3090 /* track how many SG entries we are using */
3091 if (seg > h->maxSG)
3092 h->maxSG = seg;
1da177e4
LT		 3093
3094#ifdef CCISS_DEBUG
83096ebf
TH		 3095 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3096 blk_rq_sectors(creq), seg);
7c832835 3097#endif /* CCISS_DEBUG */
1da177e4
LT		 3098
3099 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3100 if (likely(blk_fs_request(creq))) {
3101 if(h->cciss_read == CCISS_READ_10) {
3102 c->Request.CDB[1] = 0;
3103 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3104 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3105 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3106 c->Request.CDB[5] = start_blk & 0xff;
3107 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3108 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3109 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3110 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3111 } else {
582539e5
RD		 3112 u32 upper32 = upper_32_bits(start_blk);
3113
03bbfee5
MMOD		 3114 c->Request.CDBLen = 16;
3115 c->Request.CDB[1]= 0;
582539e5
RD		 3116 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3117 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3118 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3119 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3120 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3121 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3122 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3123 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3124 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3125 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3126 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3127 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3128 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3129 }
3130 } else if (blk_pc_request(creq)) {
3131 c->Request.CDBLen = creq->cmd_len;
3132 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3133 } else {
03bbfee5
MMOD		 3134 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3135 BUG();
00988a35 3136 }
1da177e4
LT		 3137
3138 spin_lock_irq(q->queue_lock);
3139
8a3173de 3140 addQ(&h->reqQ, c);
1da177e4 3141 h->Qdepth++;
7c832835
BH		 3142 if (h->Qdepth > h->maxQsinceinit)
3143 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3144
3145 goto queue;
00988a35 3146full:
1da177e4 3147 blk_stop_queue(q);
00988a35 3148startio:
1da177e4
LT		 3149 /* We will already have the driver lock here so not need
3150 * to lock it.
7c832835 3151 */
1da177e4
LT		 3152 start_io(h);
3153}
3154
3da8b713 3155static inline unsigned long get_next_completion(ctlr_info_t *h)
3156{
3da8b713 3157 return h->access.command_completed(h);
3da8b713 3158}
3159
3160static inline int interrupt_pending(ctlr_info_t *h)
3161{
3da8b713 3162 return h->access.intr_pending(h);
3da8b713 3163}
3164
3165static inline long interrupt_not_for_us(ctlr_info_t *h)
3166{
7c832835 3167 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3168 (h->interrupts_enabled == 0)));
3da8b713 3169}
3170
7d12e780 3171static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3172{
3173 ctlr_info_t *h = dev_id;
3174 CommandList_struct *c;
3175 unsigned long flags;
33079b21 3176 __u32 a, a1, a2;
1da177e4 3177
3da8b713 3178 if (interrupt_not_for_us(h))
1da177e4 3179 return IRQ_NONE;
1da177e4
LT		 3180 /*
3181 * If there are completed commands in the completion queue,
3182 * we had better do something about it.
3183 */
3184 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3185 while (interrupt_pending(h)) {
7c832835 3186 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3187 a1 = a;
33079b21
MM		 3188 if ((a & 0x04)) {
3189 a2 = (a >> 3);
f880632f 3190 if (a2 >= h->nr_cmds) {
7c832835
BH		 3191 printk(KERN_WARNING
3192 "cciss: controller cciss%d failed, stopping.\n",
3193 h->ctlr);
33079b21
MM		 3194 fail_all_cmds(h->ctlr);
3195 return IRQ_HANDLED;
3196 }
3197
3198 c = h->cmd_pool + a2;
3199 a = c->busaddr;
3200
3201 } else {
8a3173de
JA		 3202 struct hlist_node *tmp;
3203
7c832835 3204 a &= ~3;
8a3173de
JA		 3205 c = NULL;
3206 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3207 if (c->busaddr == a)
7c832835
BH		 3208 break;
3209 }
33079b21 3210 }
1da177e4
LT		 3211 /*
3212 * If we've found the command, take it off the
3213 * completion Q and free it
3214 */
8a3173de
JA		 3215 if (c && c->busaddr == a) {
3216 removeQ(c);
1da177e4
LT		 3217 if (c->cmd_type == CMD_RWREQ) {
3218 complete_command(h, c, 0);
3219 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3220 complete(c->waiting);
3221 }
3222# ifdef CONFIG_CISS_SCSI_TAPE
3223 else if (c->cmd_type == CMD_SCSI)
3224 complete_scsi_command(c, 0, a1);
3225# endif
3226 continue;
3227 }
3228 }
3229 }
3230
1da177e4
LT		 3231 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3232 return IRQ_HANDLED;
3233}
7c832835 3234
0a9279cc
MM		 3235static int scan_thread(void *data)
3236{
3237 ctlr_info_t *h = data;
3238 int rc;
3239 DECLARE_COMPLETION_ONSTACK(wait);
3240 h->rescan_wait = &wait;
3241
3242 for (;;) {
3243 rc = wait_for_completion_interruptible(&wait);
3244 if (kthread_should_stop())
3245 break;
3246 if (!rc)
3247 rebuild_lun_table(h, 0);
3248 }
3249 return 0;
3250}
3251
3252static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3253{
3254 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3255 return 0;
3256
3257 switch (c->err_info->SenseInfo[12]) {
3258 case STATE_CHANGED:
3259 printk(KERN_WARNING "cciss%d: a state change "
3260 "detected, command retried\n", h->ctlr);
3261 return 1;
3262 break;
3263 case LUN_FAILED:
3264 printk(KERN_WARNING "cciss%d: LUN failure "
3265 "detected, action required\n", h->ctlr);
3266 return 1;
3267 break;
3268 case REPORT_LUNS_CHANGED:
3269 printk(KERN_WARNING "cciss%d: report LUN data "
3270 "changed\n", h->ctlr);
3271 if (h->rescan_wait)
3272 complete(h->rescan_wait);
3273 return 1;
3274 break;
3275 case POWER_OR_RESET:
3276 printk(KERN_WARNING "cciss%d: a power on "
3277 "or device reset detected\n", h->ctlr);
3278 return 1;
3279 break;
3280 case UNIT_ATTENTION_CLEARED:
3281 printk(KERN_WARNING "cciss%d: unit attention "
3282 "cleared by another initiator\n", h->ctlr);
3283 return 1;
3284 break;
3285 default:
3286 printk(KERN_WARNING "cciss%d: unknown "
3287 "unit attention detected\n", h->ctlr);
3288 return 1;
3289 }
3290}
3291
7c832835 3292/*
d14c4ab5 3293 * We cannot read the structure directly, for portability we must use
1da177e4 3294 * the io functions.
7c832835 3295 * This is for debug only.
1da177e4
LT		 3296 */
3297#ifdef CCISS_DEBUG
7c832835 3298static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3299{
3300 int i;
3301 char temp_name[17];
3302
3303 printk("Controller Configuration information\n");
3304 printk("------------------------------------\n");
7c832835 3305 for (i = 0; i < 4; i++)
1da177e4 3306 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3307 temp_name[4] = '\0';
3308 printk(" Signature = %s\n", temp_name);
1da177e4 3309 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3310 printk(" Transport methods supported = 0x%x\n",
3311 readl(&(tb->TransportSupport)));
3312 printk(" Transport methods active = 0x%x\n",
3313 readl(&(tb->TransportActive)));
3314 printk(" Requested transport Method = 0x%x\n",
3315 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3316 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3317 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3318 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3319 readl(&(tb->HostWrite.CoalIntCount)));
3320 printk(" Max outstanding commands = 0x%d\n",
3321 readl(&(tb->CmdsOutMax)));
3322 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3323 for (i = 0; i < 16; i++)
1da177e4
LT		 3324 temp_name[i] = readb(&(tb->ServerName[i]));
3325 temp_name[16] = '\0';
3326 printk(" Server Name = %s\n", temp_name);
7c832835 3327 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3328}
7c832835 3329#endif /* CCISS_DEBUG */
1da177e4 3330
7c832835 3331static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3332{
3333 int i, offset, mem_type, bar_type;
7c832835 3334 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3335 return 0;
3336 offset = 0;
7c832835
BH		 3337 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3338 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3339 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3340 offset += 4;
3341 else {
3342 mem_type = pci_resource_flags(pdev, i) &
7c832835 3343 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3344 switch (mem_type) {
7c832835
BH		 3345 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3346 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3347 offset += 4; /* 32 bit */
3348 break;
3349 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3350 offset += 8;
3351 break;
3352 default: /* reserved in PCI 2.2 */
3353 printk(KERN_WARNING
3354 "Base address is invalid\n");
3355 return -1;
1da177e4
LT		 3356 break;
3357 }
3358 }
7c832835
BH		 3359 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3360 return i + 1;
1da177e4
LT		 3361 }
3362 return -1;
3363}
3364
fb86a35b
MM		 3365/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3366 * controllers that are capable. If not, we use IO-APIC mode.
3367 */
3368
7c832835
BH		 3369static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3370 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3371{
3372#ifdef CONFIG_PCI_MSI
7c832835
BH		 3373 int err;
3374 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3375 {0, 2}, {0, 3}
3376 };
fb86a35b
MM		 3377
3378 /* Some boards advertise MSI but don't really support it */
3379 if ((board_id == 0x40700E11) ||
7c832835
BH		 3380 (board_id == 0x40800E11) ||
3381 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3382 goto default_int_mode;
3383
7c832835
BH		 3384 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3385 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3386 if (!err) {
3387 c->intr[0] = cciss_msix_entries[0].vector;
3388 c->intr[1] = cciss_msix_entries[1].vector;
3389 c->intr[2] = cciss_msix_entries[2].vector;
3390 c->intr[3] = cciss_msix_entries[3].vector;
3391 c->msix_vector = 1;
3392 return;
3393 }
3394 if (err > 0) {
3395 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3396 "available\n", err);
1ecb9c0f 3397 goto default_int_mode;
7c832835
BH		 3398 } else {
3399 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3400 err);
1ecb9c0f 3401 goto default_int_mode;
7c832835
BH		 3402 }
3403 }
3404 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3405 if (!pci_enable_msi(pdev)) {
7c832835 3406 c->msi_vector = 1;
7c832835
BH		 3407 } else {
3408 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3409 }
3410 }
1ecb9c0f 3411default_int_mode:
7c832835 3412#endif /* CONFIG_PCI_MSI */
fb86a35b 3413 /* if we get here we're going to use the default interrupt mode */
7c832835 3414 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3415 return;
3416}
3417
7d1fd970 3418static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3419{
3420 ushort subsystem_vendor_id, subsystem_device_id, command;
3421 __u32 board_id, scratchpad = 0;
3422 __u64 cfg_offset;
3423 __u32 cfg_base_addr;
3424 __u64 cfg_base_addr_index;
c33ac89b 3425 int i, err;
1da177e4
LT		 3426
3427 /* check to see if controller has been disabled */
3428 /* BEFORE trying to enable it */
7c832835
BH		 3429 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3430 if (!(command & 0x02)) {
3431 printk(KERN_WARNING
3432 "cciss: controller appears to be disabled\n");
c33ac89b 3433 return -ENODEV;
1da177e4
LT		 3434 }
3435
c33ac89b 3436 err = pci_enable_device(pdev);
7c832835 3437 if (err) {
1da177e4 3438 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3439 return err;
1da177e4 3440 }
1da177e4 3441
4e570309
BH		 3442 err = pci_request_regions(pdev, "cciss");
3443 if (err) {
3444 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3445 "aborting\n");
872225ca 3446 return err;
4e570309
BH		 3447 }
3448
1da177e4
LT		 3449 subsystem_vendor_id = pdev->subsystem_vendor;
3450 subsystem_device_id = pdev->subsystem_device;
3451 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3452 subsystem_vendor_id);
1da177e4 3453
1da177e4
LT		 3454#ifdef CCISS_DEBUG
3455 printk("command = %x\n", command);
3456 printk("irq = %x\n", pdev->irq);
3457 printk("board_id = %x\n", board_id);
7c832835 3458#endif /* CCISS_DEBUG */
1da177e4 3459
fb86a35b
MM		 3460/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3461 * else we use the IO-APIC interrupt assigned to us by system ROM.
3462 */
3463 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3464
e1438581
MM		 3465 /* find the memory BAR */
3466 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3467 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3468 break;
3469 }
3470 if (i == DEVICE_COUNT_RESOURCE) {
3471 printk(KERN_WARNING "cciss: No memory BAR found\n");
3472 err = -ENODEV;
3473 goto err_out_free_res;
3474 }
3475
3476 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3477 * already removed
3478 */
1da177e4 3479
1da177e4 3480#ifdef CCISS_DEBUG
9f92f471 3481 printk("address 0 = %lx\n", c->paddr);
7c832835 3482#endif /* CCISS_DEBUG */
a5b92873 3483 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3484
3485 /* Wait for the board to become ready. (PCI hotplug needs this.)
3486 * We poll for up to 120 secs, once per 100ms. */
7c832835 3487 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3488 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3489 if (scratchpad == CCISS_FIRMWARE_READY)
3490 break;
3491 set_current_state(TASK_INTERRUPTIBLE);
7c832835 3492 schedule_timeout(HZ / 10); /* wait 100ms */
1da177e4
LT		 3493 }
3494 if (scratchpad != CCISS_FIRMWARE_READY) {
3495 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3496 err = -ENODEV;
4e570309 3497 goto err_out_free_res;
1da177e4
LT		 3498 }
3499
3500 /* get the address index number */
3501 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3502 cfg_base_addr &= (__u32) 0x0000ffff;
3503#ifdef CCISS_DEBUG
3504 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3505#endif /* CCISS_DEBUG */
3506 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3507#ifdef CCISS_DEBUG
9f92f471
RD		 3508 printk("cfg base address index = %llx\n",
3509 (unsigned long long)cfg_base_addr_index);
7c832835 3510#endif /* CCISS_DEBUG */
1da177e4
LT		 3511 if (cfg_base_addr_index == -1) {
3512 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3513 err = -ENODEV;
4e570309 3514 goto err_out_free_res;
1da177e4
LT		 3515 }
3516
3517 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3518#ifdef CCISS_DEBUG
9f92f471 3519 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3520#endif /* CCISS_DEBUG */
3521 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3522 cfg_base_addr_index) +
3523 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3524 c->board_id = board_id;
3525
3526#ifdef CCISS_DEBUG
945f390f 3527 print_cfg_table(c->cfgtable);
7c832835 3528#endif /* CCISS_DEBUG */
1da177e4 3529
49153998
MM		 3530 /* Some controllers support Zero Memory Raid (ZMR).
3531 * When configured in ZMR mode the number of supported
3532 * commands drops to 64. So instead of just setting an
3533 * arbitrary value we make the driver a little smarter.
3534 * We read the config table to tell us how many commands
3535 * are supported on the controller then subtract 4 to
3536 * leave a little room for ioctl calls.
3537 */
3538 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3539 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3540 if (board_id == products[i].board_id) {
3541 c->product_name = products[i].product_name;
3542 c->access = *(products[i].access);
49153998 3543 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3544 break;
3545 }
3546 }
7c832835
BH		 3547 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3548 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3549 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3550 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3551 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3552 err = -ENODEV;
4e570309 3553 goto err_out_free_res;
1da177e4 3554 }
4ff9a9a4
MM		 3555 /* We didn't find the controller in our list. We know the
3556 * signature is valid. If it's an HP device let's try to
3557 * bind to the device and fire it up. Otherwise we bail.
3558 */
3559 if (i == ARRAY_SIZE(products)) {
3560 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3561 c->product_name = products[i-1].product_name;
3562 c->access = *(products[i-1].access);
49153998 3563 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3564 printk(KERN_WARNING "cciss: This is an unknown "
3565 "Smart Array controller.\n"
3566 "cciss: Please update to the latest driver "
3567 "available from www.hp.com.\n");
3568 } else {
3569 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3570 " to access the Smart Array controller %08lx\n"
3571 , (unsigned long)board_id);
3572 err = -ENODEV;
3573 goto err_out_free_res;
3574 }
3575 }
1da177e4 3576#ifdef CONFIG_X86
7c832835
BH		 3577 {
3578 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3579 __u32 prefetch;
3580 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3581 prefetch |= 0x100;
3582 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3583 }
1da177e4
LT		 3584#endif
3585
8bf50f71
MMOD		 3586 /* Disabling DMA prefetch and refetch for the P600.
3587 * An ASIC bug may result in accesses to invalid memory addresses.
3588 * We've disabled prefetch for some time now. Testing with XEN
3589 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3590 */
3591 if(board_id == 0x3225103C) {
3592 __u32 dma_prefetch;
8bf50f71 3593 __u32 dma_refetch;
f92e2f5f
MM		 3594 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3595 dma_prefetch |= 0x8000;
3596 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3597 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3598 dma_refetch |= 0x1;
3599 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3600 }
3601
1da177e4
LT		 3602#ifdef CCISS_DEBUG
3603 printk("Trying to put board into Simple mode\n");
7c832835 3604#endif /* CCISS_DEBUG */
1da177e4 3605 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3606 /* Update the field, and then ring the doorbell */
3607 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3608 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3609
3610 /* under certain very rare conditions, this can take awhile.
3611 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3612 * as we enter this code.) */
7c832835 3613 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3614 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3615 break;
3616 /* delay and try again */
3617 set_current_state(TASK_INTERRUPTIBLE);
3618 schedule_timeout(10);
7c832835 3619 }
1da177e4
LT		 3620
3621#ifdef CCISS_DEBUG
7c832835
BH		 3622 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3623 readl(c->vaddr + SA5_DOORBELL));
3624#endif /* CCISS_DEBUG */
1da177e4 3625#ifdef CCISS_DEBUG
7c832835
BH		 3626 print_cfg_table(c->cfgtable);
3627#endif /* CCISS_DEBUG */
1da177e4 3628
7c832835 3629 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3630 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3631 " simple mode\n");
c33ac89b 3632 err = -ENODEV;
4e570309 3633 goto err_out_free_res;
1da177e4
LT		 3634 }
3635 return 0;
3636
5faad620 3637err_out_free_res:
872225ca
MM		 3638 /*
3639 * Deliberately omit pci_disable_device(): it does something nasty to
3640 * Smart Array controllers that pci_enable_device does not undo
3641 */
4e570309 3642 pci_release_regions(pdev);
c33ac89b 3643 return err;
1da177e4
LT		 3644}
3645
6ae5ce8e
MM		 3646/* Function to find the first free pointer into our hba[] array
3647 * Returns -1 if no free entries are left.
7c832835 3648 */
1da177e4
LT		 3649static int alloc_cciss_hba(void)
3650{
799202cb 3651 int i;
1da177e4 3652
7c832835 3653 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3654 if (!hba[i]) {
3655 ctlr_info_t *p;
f2912a12 3656
06ff37ff 3657 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3658 if (!p)
3659 goto Enomem;
1da177e4
LT		 3660 hba[i] = p;
3661 return i;
3662 }
3663 }
3664 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3665 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3666 return -1;
3667Enomem:
1da177e4 3668 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3669 return -1;
3670}
3671
3672static void free_hba(int i)
3673{
3674 ctlr_info_t *p = hba[i];
3675 int n;
3676
3677 hba[i] = NULL;
799202cb 3678 for (n = 0; n < CISS_MAX_LUN; n++)
1da177e4
LT		 3679 put_disk(p->gendisk[n]);
3680 kfree(p);
3681}
3682
82eb03cf
CC		 3683/* Send a message CDB to the firmware. */
3684static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3685{
3686 typedef struct {
3687 CommandListHeader_struct CommandHeader;
3688 RequestBlock_struct Request;
3689 ErrDescriptor_struct ErrorDescriptor;
3690 } Command;
3691 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3692 Command *cmd;
3693 dma_addr_t paddr64;
3694 uint32_t paddr32, tag;
3695 void __iomem *vaddr;
3696 int i, err;
3697
3698 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3699 if (vaddr == NULL)
3700 return -ENOMEM;
3701
3702 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3703 CCISS commands, so they must be allocated from the lower 4GiB of
3704 memory. */
e930438c 3705 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3706 if (err) {
3707 iounmap(vaddr);
3708 return -ENOMEM;
3709 }
3710
3711 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3712 if (cmd == NULL) {
3713 iounmap(vaddr);
3714 return -ENOMEM;
3715 }
3716
3717 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3718 although there's no guarantee, we assume that the address is at
3719 least 4-byte aligned (most likely, it's page-aligned). */
3720 paddr32 = paddr64;
3721
3722 cmd->CommandHeader.ReplyQueue = 0;
3723 cmd->CommandHeader.SGList = 0;
3724 cmd->CommandHeader.SGTotal = 0;
3725 cmd->CommandHeader.Tag.lower = paddr32;
3726 cmd->CommandHeader.Tag.upper = 0;
3727 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3728
3729 cmd->Request.CDBLen = 16;
3730 cmd->Request.Type.Type = TYPE_MSG;
3731 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3732 cmd->Request.Type.Direction = XFER_NONE;
3733 cmd->Request.Timeout = 0; /* Don't time out */
3734 cmd->Request.CDB[0] = opcode;
3735 cmd->Request.CDB[1] = type;
3736 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3737
3738 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3739 cmd->ErrorDescriptor.Addr.upper = 0;
3740 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3741
3742 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3743
3744 for (i = 0; i < 10; i++) {
3745 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3746 if ((tag & ~3) == paddr32)
3747 break;
3748 schedule_timeout_uninterruptible(HZ);
3749 }
3750
3751 iounmap(vaddr);
3752
3753 /* we leak the DMA buffer here ... no choice since the controller could
3754 still complete the command. */
3755 if (i == 10) {
3756 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3757 opcode, type);
3758 return -ETIMEDOUT;
3759 }
3760
3761 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3762
3763 if (tag & 2) {
3764 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3765 opcode, type);
3766 return -EIO;
3767 }
3768
3769 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
3770 opcode, type);
3771 return 0;
3772}
3773
3774#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
3775#define cciss_noop(p) cciss_message(p, 3, 0)
3776
3777static __devinit int cciss_reset_msi(struct pci_dev *pdev)
3778{
3779/* the #defines are stolen from drivers/pci/msi.h. */
3780#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
3781#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
3782
3783 int pos;
3784 u16 control = 0;
3785
3786 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3787 if (pos) {
3788 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3789 if (control & PCI_MSI_FLAGS_ENABLE) {
3790 printk(KERN_INFO "cciss: resetting MSI\n");
3791 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
3792 }
3793 }
3794
3795 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3796 if (pos) {
3797 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3798 if (control & PCI_MSIX_FLAGS_ENABLE) {
3799 printk(KERN_INFO "cciss: resetting MSI-X\n");
3800 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
3801 }
3802 }
3803
3804 return 0;
3805}
3806
3807/* This does a hard reset of the controller using PCI power management
3808 * states. */
3809static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
3810{
3811 u16 pmcsr, saved_config_space[32];
3812 int i, pos;
3813
3814 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
3815
3816 /* This is very nearly the same thing as
3817
3818 pci_save_state(pci_dev);
3819 pci_set_power_state(pci_dev, PCI_D3hot);
3820 pci_set_power_state(pci_dev, PCI_D0);
3821 pci_restore_state(pci_dev);
3822
3823 but we can't use these nice canned kernel routines on
3824 kexec, because they also check the MSI/MSI-X state in PCI
3825 configuration space and do the wrong thing when it is
3826 set/cleared. Also, the pci_save/restore_state functions
3827 violate the ordering requirements for restoring the
3828 configuration space from the CCISS document (see the
3829 comment below). So we roll our own .... */
3830
3831 for (i = 0; i < 32; i++)
3832 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
3833
3834 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3835 if (pos == 0) {
3836 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
3837 return -ENODEV;
3838 }
3839
3840 /* Quoting from the Open CISS Specification: "The Power
3841 * Management Control/Status Register (CSR) controls the power
3842 * state of the device. The normal operating state is D0,
3843 * CSR=00h. The software off state is D3, CSR=03h. To reset
3844 * the controller, place the interface device in D3 then to
3845 * D0, this causes a secondary PCI reset which will reset the
3846 * controller." */
3847
3848 /* enter the D3hot power management state */
3849 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3850 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3851 pmcsr |= PCI_D3hot;
3852 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3853
3854 schedule_timeout_uninterruptible(HZ >> 1);
3855
3856 /* enter the D0 power management state */
3857 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3858 pmcsr |= PCI_D0;
3859 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3860
3861 schedule_timeout_uninterruptible(HZ >> 1);
3862
3863 /* Restore the PCI configuration space. The Open CISS
3864 * Specification says, "Restore the PCI Configuration
3865 * Registers, offsets 00h through 60h. It is important to
3866 * restore the command register, 16-bits at offset 04h,
3867 * last. Do not restore the configuration status register,
3868 * 16-bits at offset 06h." Note that the offset is 2*i. */
3869 for (i = 0; i < 32; i++) {
3870 if (i == 2 || i == 3)
3871 continue;
3872 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
3873 }
3874 wmb();
3875 pci_write_config_word(pdev, 4, saved_config_space[2]);
3876
3877 return 0;
3878}
3879
1da177e4
LT		 3880/*
3881 * This is it. Find all the controllers and register them. I really hate
3882 * stealing all these major device numbers.
3883 * returns the number of block devices registered.
3884 */
3885static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 3886 const struct pci_device_id *ent)
1da177e4 3887{
1da177e4 3888 int i;
799202cb 3889 int j = 0;
1da177e4 3890 int rc;
22bece00 3891 int dac, return_code;
212a5026 3892 InquiryData_struct *inq_buff;
1da177e4 3893
82eb03cf
CC		 3894 if (reset_devices) {
3895 /* Reset the controller with a PCI power-cycle */
3896 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
3897 return -ENODEV;
3898
5e18cfd0
JA		 3899 /* Now try to get the controller to respond to a no-op. Some
3900 devices (notably the HP Smart Array 5i Controller) need
3901 up to 30 seconds to respond. */
5e4c91c8 3902 for (i=0; i<30; i++) {
82eb03cf
CC		 3903 if (cciss_noop(pdev) == 0)
3904 break;
5e4c91c8
JA		 3905
3906 schedule_timeout_uninterruptible(HZ);
3907 }
3908 if (i == 30) {
3909 printk(KERN_ERR "cciss: controller seems dead\n");
3910 return -EBUSY;
82eb03cf
CC		 3911 }
3912 }
3913
1da177e4 3914 i = alloc_cciss_hba();
7c832835 3915 if (i < 0)
e2019b58 3916 return -1;
1f8ef380
MM		 3917
3918 hba[i]->busy_initializing = 1;
8a3173de
JA		 3919 INIT_HLIST_HEAD(&hba[i]->cmpQ);
3920 INIT_HLIST_HEAD(&hba[i]->reqQ);
1f8ef380 3921
1da177e4 3922 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 3923 goto clean0;
1da177e4
LT		 3924
3925 sprintf(hba[i]->devname, "cciss%d", i);
3926 hba[i]->ctlr = i;
3927 hba[i]->pdev = pdev;
3928
7fe06326
AP		 3929 if (cciss_create_hba_sysfs_entry(hba[i]))
3930 goto clean0;
3931
1da177e4 3932 /* configure PCI DMA stuff */
6a35528a 3933 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 3934 dac = 1;
284901a9 3935 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 3936 dac = 0;
1da177e4 3937 else {
40aabb58 3938 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 3939 goto clean1;
3940 }
3941
3942 /*
3943 * register with the major number, or get a dynamic major number
3944 * by passing 0 as argument. This is done for greater than
3945 * 8 controller support.
3946 */
3947 if (i < MAX_CTLR_ORIG)
564de74a 3948 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 3949 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 3950 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 3951 printk(KERN_ERR
7c832835
BH		 3952 "cciss: Unable to get major number %d for %s "
3953 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 3954 goto clean1;
7c832835 3955 } else {
1da177e4
LT		 3956 if (i >= MAX_CTLR_ORIG)
3957 hba[i]->major = rc;
3958 }
3959
3960 /* make sure the board interrupts are off */
3961 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 3962 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 3963 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 3964 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 3965 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 3966 goto clean2;
3967 }
40aabb58
BH		 3968
3969 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 3970 hba[i]->devname, pdev->device, pci_name(pdev),
3971 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
3972
3973 hba[i]->cmd_pool_bits =
061837bc
JL		 3974 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
3975 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 3976 hba[i]->cmd_pool = (CommandList_struct *)
3977 pci_alloc_consistent(hba[i]->pdev,
f880632f 3978 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 3979 &(hba[i]->cmd_pool_dhandle));
3980 hba[i]->errinfo_pool = (ErrorInfo_struct *)
3981 pci_alloc_consistent(hba[i]->pdev,
f880632f 3982 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 3983 &(hba[i]->errinfo_pool_dhandle));
3984 if ((hba[i]->cmd_pool_bits == NULL)
3985 || (hba[i]->cmd_pool == NULL)
3986 || (hba[i]->errinfo_pool == NULL)) {
3987 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 3988 goto clean4;
3989 }
1da177e4 3990 spin_lock_init(&hba[i]->lock);
1da177e4 3991
7c832835
BH		 3992 /* Initialize the pdev driver private data.
3993 have it point to hba[i]. */
1da177e4 3994 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 3995 /* command and error info recs zeroed out before
3996 they are used */
3997 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 3998 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
3999 * sizeof(unsigned long));
1da177e4 4000
6ae5ce8e
MM		 4001 hba[i]->num_luns = 0;
4002 hba[i]->highest_lun = -1;
4003 for (j = 0; j < CISS_MAX_LUN; j++) {
4004 hba[i]->drv[j].raid_level = -1;
4005 hba[i]->drv[j].queue = NULL;
4006 hba[i]->gendisk[j] = NULL;
4007 }
1da177e4
LT		 4008
4009 cciss_scsi_setup(i);
4010
4011 /* Turn the interrupts on so we can service requests */
4012 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4013
22bece00
MM		 4014 /* Get the firmware version */
4015 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4016 if (inq_buff == NULL) {
4017 printk(KERN_ERR "cciss: out of memory\n");
4018 goto clean4;
4019 }
4020
4021 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4022 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4023 if (return_code == IO_OK) {
4024 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4025 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4026 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4027 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4028 } else { /* send command failed */
4029 printk(KERN_WARNING "cciss: unable to determine firmware"
4030 " version of controller\n");
4031 }
212a5026 4032 kfree(inq_buff);
22bece00 4033
1da177e4 4034 cciss_procinit(i);
92c4231a
MM		 4035
4036 hba[i]->cciss_max_sectors = 2048;
4037
d6dbf42e 4038 hba[i]->busy_initializing = 0;
1da177e4 4039
6ae5ce8e 4040 rebuild_lun_table(hba[i], 1);
0a9279cc
MM		 4041 hba[i]->cciss_scan_thread = kthread_run(scan_thread, hba[i],
4042 "cciss_scan%02d", i);
4043 if (IS_ERR(hba[i]->cciss_scan_thread))
4044 return PTR_ERR(hba[i]->cciss_scan_thread);
4045
e2019b58 4046 return 1;
1da177e4 4047
6ae5ce8e 4048clean4:
6044ec88 4049 kfree(hba[i]->cmd_pool_bits);
7c832835 4050 if (hba[i]->cmd_pool)
1da177e4 4051 pci_free_consistent(hba[i]->pdev,
f880632f 4052 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4053 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4054 if (hba[i]->errinfo_pool)
1da177e4 4055 pci_free_consistent(hba[i]->pdev,
f880632f 4056 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4057 hba[i]->errinfo_pool,
4058 hba[i]->errinfo_pool_dhandle);
fb86a35b 4059 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4060clean2:
1da177e4 4061 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4062clean1:
7fe06326
AP		 4063 cciss_destroy_hba_sysfs_entry(hba[i]);
4064clean0:
1f8ef380 4065 hba[i]->busy_initializing = 0;
799202cb
MM		 4066 /* cleanup any queues that may have been initialized */
4067 for (j=0; j <= hba[i]->highest_lun; j++){
4068 drive_info_struct *drv = &(hba[i]->drv[j]);
4069 if (drv->queue)
4070 blk_cleanup_queue(drv->queue);
4071 }
872225ca
MM		 4072 /*
4073 * Deliberately omit pci_disable_device(): it does something nasty to
4074 * Smart Array controllers that pci_enable_device does not undo
4075 */
799202cb 4076 pci_release_regions(pdev);
799202cb 4077 pci_set_drvdata(pdev, NULL);
61808c2b 4078 free_hba(i);
e2019b58 4079 return -1;
1da177e4
LT		 4080}
4081
e9ca75b5 4082static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4083{
4084 ctlr_info_t *tmp_ptr;
e9ca75b5 4085 int i;
1da177e4 4086 char flush_buf[4];
7c832835 4087 int return_code;
1da177e4 4088
e9ca75b5
GB		 4089 tmp_ptr = pci_get_drvdata(pdev);
4090 if (tmp_ptr == NULL)
4091 return;
4092 i = tmp_ptr->ctlr;
4093 if (hba[i] == NULL)
4094 return;
4095
4096 /* Turn board interrupts off and send the flush cache command */
4097 /* sendcmd will turn off interrupt, and send the flush...
4098 * To write all data in the battery backed cache to disks */
4099 memset(flush_buf, 0, 4);
b57695fe 4100 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4101 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4102 if (return_code == IO_OK) {
4103 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4104 } else {
4105 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4106 }
4107 free_irq(hba[i]->intr[2], hba[i]);
4108}
4109
4110static void __devexit cciss_remove_one(struct pci_dev *pdev)
4111{
4112 ctlr_info_t *tmp_ptr;
4113 int i, j;
4114
7c832835
BH		 4115 if (pci_get_drvdata(pdev) == NULL) {
4116 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4117 return;
4118 }
0a9279cc 4119
1da177e4
LT		 4120 tmp_ptr = pci_get_drvdata(pdev);
4121 i = tmp_ptr->ctlr;
7c832835 4122 if (hba[i] == NULL) {
1da177e4 4123 printk(KERN_ERR "cciss: device appears to "
7c832835 4124 "already be removed \n");
1da177e4
LT		 4125 return;
4126 }
b6550777 4127
0a9279cc
MM		 4128 kthread_stop(hba[i]->cciss_scan_thread);
4129
b6550777
BH		 4130 remove_proc_entry(hba[i]->devname, proc_cciss);
4131 unregister_blkdev(hba[i]->major, hba[i]->devname);
4132
4133 /* remove it from the disk list */
4134 for (j = 0; j < CISS_MAX_LUN; j++) {
4135 struct gendisk *disk = hba[i]->gendisk[j];
4136 if (disk) {
165125e1 4137 struct request_queue *q = disk->queue;
b6550777
BH		 4138
4139 if (disk->flags & GENHD_FL_UP)
4140 del_gendisk(disk);
4141 if (q)
4142 blk_cleanup_queue(q);
4143 }
4144 }
4145
ba198efb 4146#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4147 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4148#endif
b6550777 4149
e9ca75b5 4150 cciss_shutdown(pdev);
fb86a35b
MM		 4151
4152#ifdef CONFIG_PCI_MSI
7c832835
BH		 4153 if (hba[i]->msix_vector)
4154 pci_disable_msix(hba[i]->pdev);
4155 else if (hba[i]->msi_vector)
4156 pci_disable_msi(hba[i]->pdev);
4157#endif /* CONFIG_PCI_MSI */
fb86a35b 4158
1da177e4 4159 iounmap(hba[i]->vaddr);
1da177e4 4160
f880632f 4161 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4162 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4163 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4164 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4165 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4166 /*
4167 * Deliberately omit pci_disable_device(): it does something nasty to
4168 * Smart Array controllers that pci_enable_device does not undo
4169 */
7c832835 4170 pci_release_regions(pdev);
4e570309 4171 pci_set_drvdata(pdev, NULL);
7fe06326 4172 cciss_destroy_hba_sysfs_entry(hba[i]);
1da177e4 4173 free_hba(i);
7c832835 4174}
1da177e4
LT		 4175
4176static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4177 .name = "cciss",
4178 .probe = cciss_init_one,
4179 .remove = __devexit_p(cciss_remove_one),
4180 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4181 .shutdown = cciss_shutdown,
1da177e4
LT		 4182};
4183
4184/*
4185 * This is it. Register the PCI driver information for the cards we control
7c832835 4186 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4187 */
4188static int __init cciss_init(void)
4189{
7fe06326
AP		 4190 int err;
4191
10cbda97
JA		 4192 /*
4193 * The hardware requires that commands are aligned on a 64-bit
4194 * boundary. Given that we use pci_alloc_consistent() to allocate an
4195 * array of them, the size must be a multiple of 8 bytes.
4196 */
4197 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4198
1da177e4
LT		 4199 printk(KERN_INFO DRIVER_NAME "\n");
4200
7fe06326
AP		 4201 err = bus_register(&cciss_bus_type);
4202 if (err)
4203 return err;
4204
1da177e4 4205 /* Register for our PCI devices */
7fe06326
AP		 4206 err = pci_register_driver(&cciss_pci_driver);
4207 if (err)
4208 goto err_bus_register;
4209
4210 return 0;
4211
4212err_bus_register:
4213 bus_unregister(&cciss_bus_type);
4214 return err;
1da177e4
LT		 4215}
4216
4217static void __exit cciss_cleanup(void)
4218{
4219 int i;
4220
4221 pci_unregister_driver(&cciss_pci_driver);
4222 /* double check that all controller entrys have been removed */
7c832835
BH		 4223 for (i = 0; i < MAX_CTLR; i++) {
4224 if (hba[i] != NULL) {
1da177e4 4225 printk(KERN_WARNING "cciss: had to remove"
7c832835 4226 " controller %d\n", i);
1da177e4
LT		 4227 cciss_remove_one(hba[i]->pdev);
4228 }
4229 }
928b4d8c 4230 remove_proc_entry("driver/cciss", NULL);
7fe06326 4231 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4232}
4233
33079b21
MM		 4234static void fail_all_cmds(unsigned long ctlr)
4235{
4236 /* If we get here, the board is apparently dead. */
4237 ctlr_info_t *h = hba[ctlr];
4238 CommandList_struct *c;
4239 unsigned long flags;
4240
4241 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4242 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4243
4244 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4245
7c832835 4246 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4247
4248 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4249 while (!hlist_empty(&h->reqQ)) {
4250 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4251 removeQ(c);
33079b21 4252 h->Qdepth--;
8a3173de 4253 addQ(&h->cmpQ, c);
33079b21
MM		 4254 }
4255
4256 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4257 while (!hlist_empty(&h->cmpQ)) {
4258 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4259 removeQ(c);
b59e64d0
HR		 4260 if (c->cmd_type != CMD_MSG_STALE)
4261 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4262 if (c->cmd_type == CMD_RWREQ) {
4263 complete_command(h, c, 0);
4264 } else if (c->cmd_type == CMD_IOCTL_PEND)
4265 complete(c->waiting);
4266#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4267 else if (c->cmd_type == CMD_SCSI)
4268 complete_scsi_command(c, 0, 0);
33079b21
MM		 4269#endif
4270 }
4271 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4272 return;
4273}
4274
1da177e4
LT		 4275module_init(cciss_init);
4276module_exit(cciss_cleanup);
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