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[net-next-2.6.git] / drivers / block / cciss.c
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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>
29#include <linux/delay.h>
30#include <linux/major.h>
31#include <linux/fs.h>
32#include <linux/bio.h>
33#include <linux/blkpg.h>
34#include <linux/timer.h>
35#include <linux/proc_fs.h>
89b6e743 36#include <linux/seq_file.h>
7c832835 37#include <linux/init.h>
1da177e4
LT		 38#include <linux/hdreg.h>
39#include <linux/spinlock.h>
40#include <linux/compat.h>
2056a782 41#include <linux/blktrace_api.h>
1da177e4
LT		 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>
1da177e4
LT		 54
55#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 56#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
57#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 58
59/* Embedded module documentation macros - see modules.h */
60MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 61MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 62MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 63 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
64 " Smart Array G2 Series SAS/SATA Controllers");
65MODULE_VERSION("3.6.20");
1da177e4
LT		 66MODULE_LICENSE("GPL");
67
68#include "cciss_cmd.h"
69#include "cciss.h"
70#include <linux/cciss_ioctl.h>
71
72/* define the PCI info for the cards we can control */
73static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 74 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
75 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
76 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
83 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
84 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
85 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 101 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
102 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 103 {0,}
104};
7c832835 105
1da177e4
LT		 106MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
107
1da177e4
LT		 108/* board_id = Subsystem Device ID & Vendor ID
109 * product = Marketing Name for the board
7c832835 110 * access = Address of the struct of function pointers
1da177e4
LT		 111 */
112static struct board_type products[] = {
49153998
MM		 113 {0x40700E11, "Smart Array 5300", &SA5_access},
114 {0x40800E11, "Smart Array 5i", &SA5B_access},
115 {0x40820E11, "Smart Array 532", &SA5B_access},
116 {0x40830E11, "Smart Array 5312", &SA5B_access},
117 {0x409A0E11, "Smart Array 641", &SA5_access},
118 {0x409B0E11, "Smart Array 642", &SA5_access},
119 {0x409C0E11, "Smart Array 6400", &SA5_access},
120 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
121 {0x40910E11, "Smart Array 6i", &SA5_access},
122 {0x3225103C, "Smart Array P600", &SA5_access},
123 {0x3223103C, "Smart Array P800", &SA5_access},
124 {0x3234103C, "Smart Array P400", &SA5_access},
125 {0x3235103C, "Smart Array P400i", &SA5_access},
126 {0x3211103C, "Smart Array E200i", &SA5_access},
127 {0x3212103C, "Smart Array E200", &SA5_access},
128 {0x3213103C, "Smart Array E200i", &SA5_access},
129 {0x3214103C, "Smart Array E200i", &SA5_access},
130 {0x3215103C, "Smart Array E200i", &SA5_access},
131 {0x3237103C, "Smart Array E500", &SA5_access},
132 {0x323D103C, "Smart Array P700m", &SA5_access},
133 {0x3241103C, "Smart Array P212", &SA5_access},
134 {0x3243103C, "Smart Array P410", &SA5_access},
135 {0x3245103C, "Smart Array P410i", &SA5_access},
136 {0x3247103C, "Smart Array P411", &SA5_access},
137 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 138 {0x324A103C, "Smart Array P712m", &SA5_access},
139 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 140 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 141};
142
d14c4ab5 143/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 144#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 145#define MAX_IOCTL_CONFIG_WAIT 1000
146
147/*define how many times we will try a command because of bus resets */
148#define MAX_CMD_RETRIES 3
149
1da177e4
LT		 150#define MAX_CTLR 32
151
152/* Originally cciss driver only supports 8 major numbers */
153#define MAX_CTLR_ORIG 8
154
1da177e4
LT		 155static ctlr_info_t *hba[MAX_CTLR];
156
165125e1 157static void do_cciss_request(struct request_queue *q);
7d12e780 158static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 159static int cciss_open(struct block_device *bdev, fmode_t mode);
160static int cciss_release(struct gendisk *disk, fmode_t mode);
161static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 162 unsigned int cmd, unsigned long arg);
a885c8c4 163static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 164
1da177e4 165static int cciss_revalidate(struct gendisk *disk);
6ae5ce8e 166static int rebuild_lun_table(ctlr_info_t *h, int first_time);
7c832835
BH		 167static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
168 int clear_all);
1da177e4 169
00988a35
MMOD		 170static void cciss_read_capacity(int ctlr, int logvol, int withirq,
171 sector_t *total_size, unsigned int *block_size);
172static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
173 sector_t *total_size, unsigned int *block_size);
174static void cciss_geometry_inquiry(int ctlr, int logvol,
175 int withirq, sector_t total_size,
176 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 177 drive_info_struct *drv);
7c832835
BH		 178static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
179 __u32);
180static void start_io(ctlr_info_t *h);
181static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
182 unsigned int use_unit_num, unsigned int log_unit,
183 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
184static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
185 unsigned int use_unit_num, unsigned int log_unit,
186 __u8 page_code, int cmd_type);
1da177e4 187
33079b21
MM		 188static void fail_all_cmds(unsigned long ctlr);
189
1da177e4 190#ifdef CONFIG_PROC_FS
1da177e4
LT		 191static void cciss_procinit(int i);
192#else
7c832835
BH		 193static void cciss_procinit(int i)
194{
195}
196#endif /* CONFIG_PROC_FS */
1da177e4
LT		 197
198#ifdef CONFIG_COMPAT
ef7822c2
AV		 199static int cciss_compat_ioctl(struct block_device *, fmode_t,
200 unsigned, unsigned long);
1da177e4
LT		 201#endif
202
7c832835
BH		 203static struct block_device_operations cciss_fops = {
204 .owner = THIS_MODULE,
ef7822c2
AV		 205 .open = cciss_open,
206 .release = cciss_release,
207 .locked_ioctl = cciss_ioctl,
7c832835 208 .getgeo = cciss_getgeo,
1da177e4 209#ifdef CONFIG_COMPAT
ef7822c2 210 .compat_ioctl = cciss_compat_ioctl,
1da177e4 211#endif
7c832835 212 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 213};
214
215/*
216 * Enqueuing and dequeuing functions for cmdlists.
217 */
218static inline void addQ(CommandList_struct **Qptr, CommandList_struct *c)
219{
7c832835
BH		 220 if (*Qptr == NULL) {
221 *Qptr = c;
222 c->next = c->prev = c;
223 } else {
224 c->prev = (*Qptr)->prev;
225 c->next = (*Qptr);
226 (*Qptr)->prev->next = c;
227 (*Qptr)->prev = c;
228 }
1da177e4
LT		 229}
230
7c832835
BH		 231static inline CommandList_struct *removeQ(CommandList_struct **Qptr,
232 CommandList_struct *c)
1da177e4 233{
7c832835
BH		 234 if (c && c->next != c) {
235 if (*Qptr == c)
236 *Qptr = c->next;
237 c->prev->next = c->next;
238 c->next->prev = c->prev;
239 } else {
240 *Qptr = NULL;
241 }
242 return c;
1da177e4
LT		 243}
244
245#include "cciss_scsi.c" /* For SCSI tape support */
246
0f5486ec
RD		 247#define RAID_UNKNOWN 6
248
1da177e4
LT		 249#ifdef CONFIG_PROC_FS
250
251/*
252 * Report information about this controller.
253 */
254#define ENG_GIG 1000000000
255#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 256#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 257static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
258 "UNKNOWN"
259};
1da177e4
LT		 260
261static struct proc_dir_entry *proc_cciss;
262
89b6e743 263static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 264{
89b6e743
MM		 265 ctlr_info_t *h = seq->private;
266
267 seq_printf(seq, "%s: HP %s Controller\n"
268 "Board ID: 0x%08lx\n"
269 "Firmware Version: %c%c%c%c\n"
270 "IRQ: %d\n"
271 "Logical drives: %d\n"
272 "Current Q depth: %d\n"
273 "Current # commands on controller: %d\n"
274 "Max Q depth since init: %d\n"
275 "Max # commands on controller since init: %d\n"
276 "Max SG entries since init: %d\n",
277 h->devname,
278 h->product_name,
279 (unsigned long)h->board_id,
280 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
281 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
282 h->num_luns,
283 h->Qdepth, h->commands_outstanding,
284 h->maxQsinceinit, h->max_outstanding, h->maxSG);
285
286#ifdef CONFIG_CISS_SCSI_TAPE
287 cciss_seq_tape_report(seq, h->ctlr);
288#endif /* CONFIG_CISS_SCSI_TAPE */
289}
1da177e4 290
89b6e743
MM		 291static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
292{
293 ctlr_info_t *h = seq->private;
294 unsigned ctlr = h->ctlr;
295 unsigned long flags;
1da177e4
LT		 296
297 /* prevent displaying bogus info during configuration
298 * or deconfiguration of a logical volume
299 */
300 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
301 if (h->busy_configuring) {
302 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 303 return ERR_PTR(-EBUSY);
1da177e4
LT		 304 }
305 h->busy_configuring = 1;
306 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
307
89b6e743
MM		 308 if (*pos == 0)
309 cciss_seq_show_header(seq);
310
311 return pos;
312}
313
314static int cciss_seq_show(struct seq_file *seq, void *v)
315{
316 sector_t vol_sz, vol_sz_frac;
317 ctlr_info_t *h = seq->private;
318 unsigned ctlr = h->ctlr;
319 loff_t *pos = v;
320 drive_info_struct *drv = &h->drv[*pos];
321
322 if (*pos > h->highest_lun)
323 return 0;
324
325 if (drv->heads == 0)
326 return 0;
327
328 vol_sz = drv->nr_blocks;
329 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
330 vol_sz_frac *= 100;
331 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
332
333 if (drv->raid_level > 5)
334 drv->raid_level = RAID_UNKNOWN;
335 seq_printf(seq, "cciss/c%dd%d:"
336 "\t%4u.%02uGB\tRAID %s\n",
337 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
338 raid_label[drv->raid_level]);
339 return 0;
340}
341
342static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
343{
344 ctlr_info_t *h = seq->private;
345
346 if (*pos > h->highest_lun)
347 return NULL;
348 *pos += 1;
349
350 return pos;
351}
352
353static void cciss_seq_stop(struct seq_file *seq, void *v)
354{
355 ctlr_info_t *h = seq->private;
356
357 /* Only reset h->busy_configuring if we succeeded in setting
358 * it during cciss_seq_start. */
359 if (v == ERR_PTR(-EBUSY))
360 return;
7c832835 361
1da177e4 362 h->busy_configuring = 0;
1da177e4
LT		 363}
364
89b6e743
MM		 365static struct seq_operations cciss_seq_ops = {
366 .start = cciss_seq_start,
367 .show = cciss_seq_show,
368 .next = cciss_seq_next,
369 .stop = cciss_seq_stop,
370};
371
372static int cciss_seq_open(struct inode *inode, struct file *file)
373{
374 int ret = seq_open(file, &cciss_seq_ops);
375 struct seq_file *seq = file->private_data;
376
377 if (!ret)
378 seq->private = PDE(inode)->data;
379
380 return ret;
381}
382
383static ssize_t
384cciss_proc_write(struct file *file, const char __user *buf,
385 size_t length, loff_t *ppos)
1da177e4 386{
89b6e743
MM		 387 int err;
388 char *buffer;
389
390#ifndef CONFIG_CISS_SCSI_TAPE
391 return -EINVAL;
1da177e4
LT		 392#endif
393
89b6e743 394 if (!buf || length > PAGE_SIZE - 1)
7c832835 395 return -EINVAL;
89b6e743
MM		 396
397 buffer = (char *)__get_free_page(GFP_KERNEL);
398 if (!buffer)
399 return -ENOMEM;
400
401 err = -EFAULT;
402 if (copy_from_user(buffer, buf, length))
403 goto out;
404 buffer[length] = '\0';
405
406#ifdef CONFIG_CISS_SCSI_TAPE
407 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
408 struct seq_file *seq = file->private_data;
409 ctlr_info_t *h = seq->private;
410 int rc;
411
7c832835
BH		 412 rc = cciss_engage_scsi(h->ctlr);
413 if (rc != 0)
89b6e743
MM		 414 err = -rc;
415 else
416 err = length;
417 } else
418#endif /* CONFIG_CISS_SCSI_TAPE */
419 err = -EINVAL;
7c832835
BH		 420 /* might be nice to have "disengage" too, but it's not
421 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 422
423out:
424 free_page((unsigned long)buffer);
425 return err;
1da177e4
LT		 426}
427
89b6e743
MM		 428static struct file_operations cciss_proc_fops = {
429 .owner = THIS_MODULE,
430 .open = cciss_seq_open,
431 .read = seq_read,
432 .llseek = seq_lseek,
433 .release = seq_release,
434 .write = cciss_proc_write,
435};
436
1da177e4
LT		 437static void __devinit cciss_procinit(int i)
438{
439 struct proc_dir_entry *pde;
440
89b6e743 441 if (proc_cciss == NULL)
928b4d8c 442 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 443 if (!proc_cciss)
444 return;
3dfcf9c4 445 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 446 S_IROTH, proc_cciss,
3dfcf9c4 447 &cciss_proc_fops, hba[i]);
1da177e4 448}
7c832835 449#endif /* CONFIG_PROC_FS */
1da177e4 450
7c832835
BH		 451/*
452 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 453 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 454 * which ones are free or in use. For operations that can wait for kmalloc
455 * to possible sleep, this routine can be called with get_from_pool set to 0.
456 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
457 */
458static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 459{
460 CommandList_struct *c;
7c832835 461 int i;
1da177e4
LT		 462 u64bit temp64;
463 dma_addr_t cmd_dma_handle, err_dma_handle;
464
7c832835
BH		 465 if (!get_from_pool) {
466 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
467 sizeof(CommandList_struct), &cmd_dma_handle);
468 if (c == NULL)
469 return NULL;
1da177e4
LT		 470 memset(c, 0, sizeof(CommandList_struct));
471
33079b21
MM		 472 c->cmdindex = -1;
473
7c832835
BH		 474 c->err_info = (ErrorInfo_struct *)
475 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
476 &err_dma_handle);
477
478 if (c->err_info == NULL) {
479 pci_free_consistent(h->pdev,
1da177e4
LT		 480 sizeof(CommandList_struct), c, cmd_dma_handle);
481 return NULL;
482 }
483 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 484 } else { /* get it out of the controllers pool */
485
486 do {
f880632f
MM		 487 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
488 if (i == h->nr_cmds)
7c832835
BH		 489 return NULL;
490 } while (test_and_set_bit
491 (i & (BITS_PER_LONG - 1),
492 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 493#ifdef CCISS_DEBUG
494 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
495#endif
7c832835 496 c = h->cmd_pool + i;
1da177e4 497 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 498 cmd_dma_handle = h->cmd_pool_dhandle
499 + i * sizeof(CommandList_struct);
1da177e4
LT		 500 c->err_info = h->errinfo_pool + i;
501 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 502 err_dma_handle = h->errinfo_pool_dhandle
503 + i * sizeof(ErrorInfo_struct);
504 h->nr_allocs++;
33079b21
MM		 505
506 c->cmdindex = i;
7c832835 507 }
1da177e4
LT		 508
509 c->busaddr = (__u32) cmd_dma_handle;
7c832835 510 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 511 c->ErrDesc.Addr.lower = temp64.val32.lower;
512 c->ErrDesc.Addr.upper = temp64.val32.upper;
513 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 514
7c832835
BH		 515 c->ctlr = h->ctlr;
516 return c;
1da177e4
LT		 517}
518
7c832835
BH		 519/*
520 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 521 */
522static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
523{
524 int i;
525 u64bit temp64;
526
7c832835 527 if (!got_from_pool) {
1da177e4
LT		 528 temp64.val32.lower = c->ErrDesc.Addr.lower;
529 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 530 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
531 c->err_info, (dma_addr_t) temp64.val);
532 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
533 c, (dma_addr_t) c->busaddr);
534 } else {
1da177e4 535 i = c - h->cmd_pool;
7c832835
BH		 536 clear_bit(i & (BITS_PER_LONG - 1),
537 h->cmd_pool_bits + (i / BITS_PER_LONG));
538 h->nr_frees++;
539 }
1da177e4
LT		 540}
541
542static inline ctlr_info_t *get_host(struct gendisk *disk)
543{
7c832835 544 return disk->queue->queuedata;
1da177e4
LT		 545}
546
547static inline drive_info_struct *get_drv(struct gendisk *disk)
548{
549 return disk->private_data;
550}
551
552/*
553 * Open. Make sure the device is really there.
554 */
ef7822c2 555static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 556{
ef7822c2
AV		 557 ctlr_info_t *host = get_host(bdev->bd_disk);
558 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 559
560#ifdef CCISS_DEBUG
ef7822c2 561 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 562#endif /* CCISS_DEBUG */
1da177e4 563
ddd47442
MM		 564 if (host->busy_initializing || drv->busy_configuring)
565 return -EBUSY;
1da177e4
LT		 566 /*
567 * Root is allowed to open raw volume zero even if it's not configured
568 * so array config can still work. Root is also allowed to open any
569 * volume that has a LUN ID, so it can issue IOCTL to reread the
570 * disk information. I don't think I really like this
571 * but I'm already using way to many device nodes to claim another one
572 * for "raw controller".
573 */
7a06f789 574 if (drv->heads == 0) {
ef7822c2 575 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 576 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 577 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 578 return -ENXIO;
1da177e4
LT		 579 /* if it is, make sure we have a LUN ID */
580 } else if (drv->LunID == 0) {
581 return -ENXIO;
582 }
583 }
584 if (!capable(CAP_SYS_ADMIN))
585 return -EPERM;
586 }
587 drv->usage_count++;
588 host->usage_count++;
589 return 0;
590}
7c832835 591
1da177e4
LT		 592/*
593 * Close. Sync first.
594 */
ef7822c2 595static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 596{
ef7822c2
AV		 597 ctlr_info_t *host = get_host(disk);
598 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 599
600#ifdef CCISS_DEBUG
ef7822c2 601 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 602#endif /* CCISS_DEBUG */
1da177e4
LT		 603
604 drv->usage_count--;
605 host->usage_count--;
606 return 0;
607}
608
609#ifdef CONFIG_COMPAT
610
ef7822c2
AV		 611static int do_ioctl(struct block_device *bdev, fmode_t mode,
612 unsigned cmd, unsigned long arg)
1da177e4
LT		 613{
614 int ret;
615 lock_kernel();
ef7822c2 616 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 617 unlock_kernel();
618 return ret;
619}
620
ef7822c2
AV		 621static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
622 unsigned cmd, unsigned long arg);
623static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
624 unsigned cmd, unsigned long arg);
1da177e4 625
ef7822c2
AV		 626static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
627 unsigned cmd, unsigned long arg)
1da177e4
LT		 628{
629 switch (cmd) {
630 case CCISS_GETPCIINFO:
631 case CCISS_GETINTINFO:
632 case CCISS_SETINTINFO:
633 case CCISS_GETNODENAME:
634 case CCISS_SETNODENAME:
635 case CCISS_GETHEARTBEAT:
636 case CCISS_GETBUSTYPES:
637 case CCISS_GETFIRMVER:
638 case CCISS_GETDRIVVER:
639 case CCISS_REVALIDVOLS:
640 case CCISS_DEREGDISK:
641 case CCISS_REGNEWDISK:
642 case CCISS_REGNEWD:
643 case CCISS_RESCANDISK:
644 case CCISS_GETLUNINFO:
ef7822c2 645 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 646
647 case CCISS_PASSTHRU32:
ef7822c2 648 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 649 case CCISS_BIG_PASSTHRU32:
ef7822c2 650 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 651
652 default:
653 return -ENOIOCTLCMD;
654 }
655}
656
ef7822c2
AV		 657static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
658 unsigned cmd, unsigned long arg)
1da177e4
LT		 659{
660 IOCTL32_Command_struct __user *arg32 =
7c832835 661 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 662 IOCTL_Command_struct arg64;
663 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
664 int err;
665 u32 cp;
666
667 err = 0;
7c832835
BH		 668 err |=
669 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
670 sizeof(arg64.LUN_info));
671 err |=
672 copy_from_user(&arg64.Request, &arg32->Request,
673 sizeof(arg64.Request));
674 err |=
675 copy_from_user(&arg64.error_info, &arg32->error_info,
676 sizeof(arg64.error_info));
1da177e4
LT		 677 err |= get_user(arg64.buf_size, &arg32->buf_size);
678 err |= get_user(cp, &arg32->buf);
679 arg64.buf = compat_ptr(cp);
680 err |= copy_to_user(p, &arg64, sizeof(arg64));
681
682 if (err)
683 return -EFAULT;
684
ef7822c2 685 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 686 if (err)
687 return err;
7c832835
BH		 688 err |=
689 copy_in_user(&arg32->error_info, &p->error_info,
690 sizeof(arg32->error_info));
1da177e4
LT		 691 if (err)
692 return -EFAULT;
693 return err;
694}
695
ef7822c2
AV		 696static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
697 unsigned cmd, unsigned long arg)
1da177e4
LT		 698{
699 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 700 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 701 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 702 BIG_IOCTL_Command_struct __user *p =
703 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 704 int err;
705 u32 cp;
706
707 err = 0;
7c832835
BH		 708 err |=
709 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
710 sizeof(arg64.LUN_info));
711 err |=
712 copy_from_user(&arg64.Request, &arg32->Request,
713 sizeof(arg64.Request));
714 err |=
715 copy_from_user(&arg64.error_info, &arg32->error_info,
716 sizeof(arg64.error_info));
1da177e4
LT		 717 err |= get_user(arg64.buf_size, &arg32->buf_size);
718 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
719 err |= get_user(cp, &arg32->buf);
720 arg64.buf = compat_ptr(cp);
721 err |= copy_to_user(p, &arg64, sizeof(arg64));
722
723 if (err)
7c832835 724 return -EFAULT;
1da177e4 725
ef7822c2 726 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 727 if (err)
728 return err;
7c832835
BH		 729 err |=
730 copy_in_user(&arg32->error_info, &p->error_info,
731 sizeof(arg32->error_info));
1da177e4
LT		 732 if (err)
733 return -EFAULT;
734 return err;
735}
736#endif
a885c8c4
CH		 737
738static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
739{
740 drive_info_struct *drv = get_drv(bdev->bd_disk);
741
742 if (!drv->cylinders)
743 return -ENXIO;
744
745 geo->heads = drv->heads;
746 geo->sectors = drv->sectors;
747 geo->cylinders = drv->cylinders;
748 return 0;
749}
750
1da177e4 751/*
7c832835 752 * ioctl
1da177e4 753 */
ef7822c2 754static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 755 unsigned int cmd, unsigned long arg)
1da177e4 756{
1da177e4
LT		 757 struct gendisk *disk = bdev->bd_disk;
758 ctlr_info_t *host = get_host(disk);
759 drive_info_struct *drv = get_drv(disk);
760 int ctlr = host->ctlr;
761 void __user *argp = (void __user *)arg;
762
763#ifdef CCISS_DEBUG
764 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 765#endif /* CCISS_DEBUG */
766
767 switch (cmd) {
1da177e4 768 case CCISS_GETPCIINFO:
7c832835
BH		 769 {
770 cciss_pci_info_struct pciinfo;
771
772 if (!arg)
773 return -EINVAL;
774 pciinfo.domain = pci_domain_nr(host->pdev->bus);
775 pciinfo.bus = host->pdev->bus->number;
776 pciinfo.dev_fn = host->pdev->devfn;
777 pciinfo.board_id = host->board_id;
778 if (copy_to_user
779 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
780 return -EFAULT;
781 return 0;
782 }
1da177e4 783 case CCISS_GETINTINFO:
7c832835
BH		 784 {
785 cciss_coalint_struct intinfo;
786 if (!arg)
787 return -EINVAL;
788 intinfo.delay =
789 readl(&host->cfgtable->HostWrite.CoalIntDelay);
790 intinfo.count =
791 readl(&host->cfgtable->HostWrite.CoalIntCount);
792 if (copy_to_user
793 (argp, &intinfo, sizeof(cciss_coalint_struct)))
794 return -EFAULT;
795 return 0;
796 }
1da177e4 797 case CCISS_SETINTINFO:
1da177e4 798 {
7c832835
BH		 799 cciss_coalint_struct intinfo;
800 unsigned long flags;
801 int i;
802
803 if (!arg)
804 return -EINVAL;
805 if (!capable(CAP_SYS_ADMIN))
806 return -EPERM;
807 if (copy_from_user
808 (&intinfo, argp, sizeof(cciss_coalint_struct)))
809 return -EFAULT;
810 if ((intinfo.delay == 0) && (intinfo.count == 0))
811 {
812// printk("cciss_ioctl: delay and count cannot be 0\n");
813 return -EINVAL;
814 }
815 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
816 /* Update the field, and then ring the doorbell */
817 writel(intinfo.delay,
818 &(host->cfgtable->HostWrite.CoalIntDelay));
819 writel(intinfo.count,
820 &(host->cfgtable->HostWrite.CoalIntCount));
821 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
822
823 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
824 if (!(readl(host->vaddr + SA5_DOORBELL)
825 & CFGTBL_ChangeReq))
826 break;
827 /* delay and try again */
828 udelay(1000);
829 }
830 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
831 if (i >= MAX_IOCTL_CONFIG_WAIT)
832 return -EAGAIN;
833 return 0;
1da177e4 834 }
1da177e4 835 case CCISS_GETNODENAME:
7c832835
BH		 836 {
837 NodeName_type NodeName;
838 int i;
839
840 if (!arg)
841 return -EINVAL;
842 for (i = 0; i < 16; i++)
843 NodeName[i] =
844 readb(&host->cfgtable->ServerName[i]);
845 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
846 return -EFAULT;
847 return 0;
848 }
1da177e4 849 case CCISS_SETNODENAME:
7c832835
BH		 850 {
851 NodeName_type NodeName;
852 unsigned long flags;
853 int i;
854
855 if (!arg)
856 return -EINVAL;
857 if (!capable(CAP_SYS_ADMIN))
858 return -EPERM;
859
860 if (copy_from_user
861 (NodeName, argp, sizeof(NodeName_type)))
862 return -EFAULT;
863
864 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
865
866 /* Update the field, and then ring the doorbell */
867 for (i = 0; i < 16; i++)
868 writeb(NodeName[i],
869 &host->cfgtable->ServerName[i]);
870
871 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
872
873 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
874 if (!(readl(host->vaddr + SA5_DOORBELL)
875 & CFGTBL_ChangeReq))
876 break;
877 /* delay and try again */
878 udelay(1000);
879 }
880 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
881 if (i >= MAX_IOCTL_CONFIG_WAIT)
882 return -EAGAIN;
883 return 0;
884 }
1da177e4
LT		 885
886 case CCISS_GETHEARTBEAT:
7c832835
BH		 887 {
888 Heartbeat_type heartbeat;
889
890 if (!arg)
891 return -EINVAL;
892 heartbeat = readl(&host->cfgtable->HeartBeat);
893 if (copy_to_user
894 (argp, &heartbeat, sizeof(Heartbeat_type)))
895 return -EFAULT;
896 return 0;
897 }
1da177e4 898 case CCISS_GETBUSTYPES:
7c832835
BH		 899 {
900 BusTypes_type BusTypes;
901
902 if (!arg)
903 return -EINVAL;
904 BusTypes = readl(&host->cfgtable->BusTypes);
905 if (copy_to_user
906 (argp, &BusTypes, sizeof(BusTypes_type)))
907 return -EFAULT;
908 return 0;
909 }
1da177e4 910 case CCISS_GETFIRMVER:
7c832835
BH		 911 {
912 FirmwareVer_type firmware;
1da177e4 913
7c832835
BH		 914 if (!arg)
915 return -EINVAL;
916 memcpy(firmware, host->firm_ver, 4);
1da177e4 917
7c832835
BH		 918 if (copy_to_user
919 (argp, firmware, sizeof(FirmwareVer_type)))
920 return -EFAULT;
921 return 0;
922 }
923 case CCISS_GETDRIVVER:
924 {
925 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 926
7c832835
BH		 927 if (!arg)
928 return -EINVAL;
1da177e4 929
7c832835
BH		 930 if (copy_to_user
931 (argp, &DriverVer, sizeof(DriverVer_type)))
932 return -EFAULT;
933 return 0;
934 }
1da177e4 935
6ae5ce8e
MM		 936 case CCISS_DEREGDISK:
937 case CCISS_REGNEWD:
1da177e4 938 case CCISS_REVALIDVOLS:
6ae5ce8e 939 return rebuild_lun_table(host, 0);
7c832835
BH		 940
941 case CCISS_GETLUNINFO:{
942 LogvolInfo_struct luninfo;
943
944 luninfo.LunID = drv->LunID;
945 luninfo.num_opens = drv->usage_count;
946 luninfo.num_parts = 0;
947 if (copy_to_user(argp, &luninfo,
948 sizeof(LogvolInfo_struct)))
949 return -EFAULT;
950 return 0;
951 }
1da177e4 952 case CCISS_PASSTHRU:
1da177e4 953 {
7c832835
BH		 954 IOCTL_Command_struct iocommand;
955 CommandList_struct *c;
956 char *buff = NULL;
957 u64bit temp64;
958 unsigned long flags;
6e9a4738 959 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 960
7c832835
BH		 961 if (!arg)
962 return -EINVAL;
1da177e4 963
7c832835
BH		 964 if (!capable(CAP_SYS_RAWIO))
965 return -EPERM;
1da177e4 966
7c832835
BH		 967 if (copy_from_user
968 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
969 return -EFAULT;
970 if ((iocommand.buf_size < 1) &&
971 (iocommand.Request.Type.Direction != XFER_NONE)) {
972 return -EINVAL;
973 }
974#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
975 /* Check kmalloc limits */
976 if (iocommand.buf_size > 128000)
977 return -EINVAL;
978#endif
979 if (iocommand.buf_size > 0) {
980 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
981 if (buff == NULL)
982 return -EFAULT;
983 }
984 if (iocommand.Request.Type.Direction == XFER_WRITE) {
985 /* Copy the data into the buffer we created */
986 if (copy_from_user
987 (buff, iocommand.buf, iocommand.buf_size)) {
988 kfree(buff);
989 return -EFAULT;
990 }
991 } else {
992 memset(buff, 0, iocommand.buf_size);
993 }
994 if ((c = cmd_alloc(host, 0)) == NULL) {
995 kfree(buff);
996 return -ENOMEM;
997 }
998 // Fill in the command type
999 c->cmd_type = CMD_IOCTL_PEND;
1000 // Fill in Command Header
1001 c->Header.ReplyQueue = 0; // unused in simple mode
1002 if (iocommand.buf_size > 0) // buffer to fill
1003 {
1004 c->Header.SGList = 1;
1005 c->Header.SGTotal = 1;
1006 } else // no buffers to fill
1007 {
1008 c->Header.SGList = 0;
1009 c->Header.SGTotal = 0;
1010 }
1011 c->Header.LUN = iocommand.LUN_info;
1012 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1013
7c832835
BH		 1014 // Fill in Request block
1015 c->Request = iocommand.Request;
1da177e4 1016
7c832835
BH		 1017 // Fill in the scatter gather information
1018 if (iocommand.buf_size > 0) {
1019 temp64.val = pci_map_single(host->pdev, buff,
1020 iocommand.buf_size,
1021 PCI_DMA_BIDIRECTIONAL);
1022 c->SG[0].Addr.lower = temp64.val32.lower;
1023 c->SG[0].Addr.upper = temp64.val32.upper;
1024 c->SG[0].Len = iocommand.buf_size;
1025 c->SG[0].Ext = 0; // we are not chaining
1026 }
1027 c->waiting = &wait;
1028
1029 /* Put the request on the tail of the request queue */
1030 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1031 addQ(&host->reqQ, c);
1032 host->Qdepth++;
1033 start_io(host);
1034 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1035
1036 wait_for_completion(&wait);
1037
1038 /* unlock the buffers from DMA */
1039 temp64.val32.lower = c->SG[0].Addr.lower;
1040 temp64.val32.upper = c->SG[0].Addr.upper;
1041 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1042 iocommand.buf_size,
1043 PCI_DMA_BIDIRECTIONAL);
1044
1045 /* Copy the error information out */
1046 iocommand.error_info = *(c->err_info);
1047 if (copy_to_user
1048 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1049 kfree(buff);
1da177e4
LT		 1050 cmd_free(host, c, 0);
1051 return -EFAULT;
1052 }
7c832835
BH		 1053
1054 if (iocommand.Request.Type.Direction == XFER_READ) {
1055 /* Copy the data out of the buffer we created */
1056 if (copy_to_user
1057 (iocommand.buf, buff, iocommand.buf_size)) {
1058 kfree(buff);
1059 cmd_free(host, c, 0);
1060 return -EFAULT;
1061 }
1062 }
1063 kfree(buff);
1064 cmd_free(host, c, 0);
1065 return 0;
1da177e4 1066 }
7c832835
BH		 1067 case CCISS_BIG_PASSTHRU:{
1068 BIG_IOCTL_Command_struct *ioc;
1069 CommandList_struct *c;
1070 unsigned char **buff = NULL;
1071 int *buff_size = NULL;
1072 u64bit temp64;
1073 unsigned long flags;
1074 BYTE sg_used = 0;
1075 int status = 0;
1076 int i;
6e9a4738 1077 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1078 __u32 left;
1079 __u32 sz;
1080 BYTE __user *data_ptr;
1081
1082 if (!arg)
1083 return -EINVAL;
1084 if (!capable(CAP_SYS_RAWIO))
1085 return -EPERM;
1086 ioc = (BIG_IOCTL_Command_struct *)
1087 kmalloc(sizeof(*ioc), GFP_KERNEL);
1088 if (!ioc) {
1089 status = -ENOMEM;
1090 goto cleanup1;
1091 }
1092 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1093 status = -EFAULT;
1094 goto cleanup1;
1095 }
1096 if ((ioc->buf_size < 1) &&
1097 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1098 status = -EINVAL;
1099 goto cleanup1;
7c832835
BH		 1100 }
1101 /* Check kmalloc limits using all SGs */
1102 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1103 status = -EINVAL;
1104 goto cleanup1;
1105 }
1106 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1107 status = -EINVAL;
1108 goto cleanup1;
1109 }
1110 buff =
1111 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1112 if (!buff) {
1da177e4
LT		 1113 status = -ENOMEM;
1114 goto cleanup1;
1115 }
5cbded58 1116 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1117 GFP_KERNEL);
1118 if (!buff_size) {
1119 status = -ENOMEM;
1120 goto cleanup1;
1121 }
1122 left = ioc->buf_size;
1123 data_ptr = ioc->buf;
1124 while (left) {
1125 sz = (left >
1126 ioc->malloc_size) ? ioc->
1127 malloc_size : left;
1128 buff_size[sg_used] = sz;
1129 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1130 if (buff[sg_used] == NULL) {
1da177e4 1131 status = -ENOMEM;
15534d38
JA		 1132 goto cleanup1;
1133 }
7c832835
BH		 1134 if (ioc->Request.Type.Direction == XFER_WRITE) {
1135 if (copy_from_user
1136 (buff[sg_used], data_ptr, sz)) {
f7108f91 1137 status = -EFAULT;
7c832835
BH		 1138 goto cleanup1;
1139 }
1140 } else {
1141 memset(buff[sg_used], 0, sz);
1142 }
1143 left -= sz;
1144 data_ptr += sz;
1145 sg_used++;
1146 }
1147 if ((c = cmd_alloc(host, 0)) == NULL) {
1148 status = -ENOMEM;
1149 goto cleanup1;
1150 }
1151 c->cmd_type = CMD_IOCTL_PEND;
1152 c->Header.ReplyQueue = 0;
1153
1154 if (ioc->buf_size > 0) {
1155 c->Header.SGList = sg_used;
1156 c->Header.SGTotal = sg_used;
1da177e4 1157 } else {
7c832835
BH		 1158 c->Header.SGList = 0;
1159 c->Header.SGTotal = 0;
1da177e4 1160 }
7c832835
BH		 1161 c->Header.LUN = ioc->LUN_info;
1162 c->Header.Tag.lower = c->busaddr;
1163
1164 c->Request = ioc->Request;
1165 if (ioc->buf_size > 0) {
1166 int i;
1167 for (i = 0; i < sg_used; i++) {
1168 temp64.val =
1169 pci_map_single(host->pdev, buff[i],
1170 buff_size[i],
1171 PCI_DMA_BIDIRECTIONAL);
1172 c->SG[i].Addr.lower =
1173 temp64.val32.lower;
1174 c->SG[i].Addr.upper =
1175 temp64.val32.upper;
1176 c->SG[i].Len = buff_size[i];
1177 c->SG[i].Ext = 0; /* we are not chaining */
1178 }
1179 }
1180 c->waiting = &wait;
1181 /* Put the request on the tail of the request queue */
1182 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1183 addQ(&host->reqQ, c);
1184 host->Qdepth++;
1185 start_io(host);
1186 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1187 wait_for_completion(&wait);
1188 /* unlock the buffers from DMA */
1189 for (i = 0; i < sg_used; i++) {
1190 temp64.val32.lower = c->SG[i].Addr.lower;
1191 temp64.val32.upper = c->SG[i].Addr.upper;
1192 pci_unmap_single(host->pdev,
1193 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1194 PCI_DMA_BIDIRECTIONAL);
1da177e4 1195 }
7c832835
BH		 1196 /* Copy the error information out */
1197 ioc->error_info = *(c->err_info);
1198 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1199 cmd_free(host, c, 0);
1200 status = -EFAULT;
1201 goto cleanup1;
1202 }
1203 if (ioc->Request.Type.Direction == XFER_READ) {
1204 /* Copy the data out of the buffer we created */
1205 BYTE __user *ptr = ioc->buf;
1206 for (i = 0; i < sg_used; i++) {
1207 if (copy_to_user
1208 (ptr, buff[i], buff_size[i])) {
1209 cmd_free(host, c, 0);
1210 status = -EFAULT;
1211 goto cleanup1;
1212 }
1213 ptr += buff_size[i];
1da177e4 1214 }
1da177e4 1215 }
7c832835
BH		 1216 cmd_free(host, c, 0);
1217 status = 0;
1218 cleanup1:
1219 if (buff) {
1220 for (i = 0; i < sg_used; i++)
1221 kfree(buff[i]);
1222 kfree(buff);
1223 }
1224 kfree(buff_size);
1225 kfree(ioc);
1226 return status;
1da177e4 1227 }
03bbfee5
MMOD		 1228
1229 /* scsi_cmd_ioctl handles these, below, though some are not */
1230 /* very meaningful for cciss. SG_IO is the main one people want. */
1231
1232 case SG_GET_VERSION_NUM:
1233 case SG_SET_TIMEOUT:
1234 case SG_GET_TIMEOUT:
1235 case SG_GET_RESERVED_SIZE:
1236 case SG_SET_RESERVED_SIZE:
1237 case SG_EMULATED_HOST:
1238 case SG_IO:
1239 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1240 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1241
1242 /* scsi_cmd_ioctl would normally handle these, below, but */
1243 /* they aren't a good fit for cciss, as CD-ROMs are */
1244 /* not supported, and we don't have any bus/target/lun */
1245 /* which we present to the kernel. */
1246
1247 case CDROM_SEND_PACKET:
1248 case CDROMCLOSETRAY:
1249 case CDROMEJECT:
1250 case SCSI_IOCTL_GET_IDLUN:
1251 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1252 default:
1253 return -ENOTTY;
1254 }
1da177e4
LT		 1255}
1256
7b30f092
JA		 1257static void cciss_check_queues(ctlr_info_t *h)
1258{
1259 int start_queue = h->next_to_run;
1260 int i;
1261
1262 /* check to see if we have maxed out the number of commands that can
1263 * be placed on the queue. If so then exit. We do this check here
1264 * in case the interrupt we serviced was from an ioctl and did not
1265 * free any new commands.
1266 */
f880632f 1267 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1268 return;
1269
1270 /* We have room on the queue for more commands. Now we need to queue
1271 * them up. We will also keep track of the next queue to run so
1272 * that every queue gets a chance to be started first.
1273 */
1274 for (i = 0; i < h->highest_lun + 1; i++) {
1275 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1276 /* make sure the disk has been added and the drive is real
1277 * because this can be called from the middle of init_one.
1278 */
1279 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1280 continue;
1281 blk_start_queue(h->gendisk[curr_queue]->queue);
1282
1283 /* check to see if we have maxed out the number of commands
1284 * that can be placed on the queue.
1285 */
f880632f 1286 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1287 if (curr_queue == start_queue) {
1288 h->next_to_run =
1289 (start_queue + 1) % (h->highest_lun + 1);
1290 break;
1291 } else {
1292 h->next_to_run = curr_queue;
1293 break;
1294 }
7b30f092
JA		 1295 }
1296 }
1297}
1298
ca1e0484
MM		 1299static void cciss_softirq_done(struct request *rq)
1300{
1301 CommandList_struct *cmd = rq->completion_data;
1302 ctlr_info_t *h = hba[cmd->ctlr];
1303 unsigned long flags;
1304 u64bit temp64;
1305 int i, ddir;
1306
1307 if (cmd->Request.Type.Direction == XFER_READ)
1308 ddir = PCI_DMA_FROMDEVICE;
1309 else
1310 ddir = PCI_DMA_TODEVICE;
1311
1312 /* command did not need to be retried */
1313 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1314 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1315 temp64.val32.lower = cmd->SG[i].Addr.lower;
1316 temp64.val32.upper = cmd->SG[i].Addr.upper;
1317 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1318 }
1319
ca1e0484
MM		 1320#ifdef CCISS_DEBUG
1321 printk("Done with %p\n", rq);
7c832835 1322#endif /* CCISS_DEBUG */
ca1e0484 1323
3daeea29
KU		 1324 if (blk_end_request(rq, (rq->errors == 0) ? 0 : -EIO, blk_rq_bytes(rq)))
1325 BUG();
1326
ca1e0484 1327 spin_lock_irqsave(&h->lock, flags);
7c832835 1328 cmd_free(h, cmd, 1);
7b30f092 1329 cciss_check_queues(h);
ca1e0484
MM		 1330 spin_unlock_irqrestore(&h->lock, flags);
1331}
1332
a72da29b
MM		 1333/* This function gets the serial number of a logical drive via
1334 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1335 * number cannot be had, for whatever reason, 16 bytes of 0xff
1336 * are returned instead.
1337 */
1338static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1339 unsigned char *serial_no, int buflen)
1340{
1341#define PAGE_83_INQ_BYTES 64
1342 int rc;
1343 unsigned char *buf;
1344
1345 if (buflen > 16)
1346 buflen = 16;
1347 memset(serial_no, 0xff, buflen);
1348 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1349 if (!buf)
1350 return;
1351 memset(serial_no, 0, buflen);
1352 if (withirq)
1353 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1354 PAGE_83_INQ_BYTES, 1, logvol, 0x83, TYPE_CMD);
1355 else
1356 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
1357 PAGE_83_INQ_BYTES, 1, logvol, 0x83, NULL, TYPE_CMD);
1358 if (rc == IO_OK)
1359 memcpy(serial_no, &buf[8], buflen);
1360 kfree(buf);
1361 return;
1362}
1363
6ae5ce8e
MM		 1364static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1365 int drv_index)
1366{
1367 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1368 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1369 disk->major = h->major;
1370 disk->first_minor = drv_index << NWD_SHIFT;
1371 disk->fops = &cciss_fops;
1372 disk->private_data = &h->drv[drv_index];
40444308 1373 disk->driverfs_dev = &h->pdev->dev;
6ae5ce8e
MM		 1374
1375 /* Set up queue information */
1376 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1377
1378 /* This is a hardware imposed limit. */
1379 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1380
1381 /* This is a limit in the driver and could be eliminated. */
1382 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1383
1384 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1385
1386 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1387
1388 disk->queue->queuedata = h;
1389
1390 blk_queue_hardsect_size(disk->queue,
1391 h->drv[drv_index].block_size);
1392
1393 /* Make sure all queue data is written out before */
1394 /* setting h->drv[drv_index].queue, as setting this */
1395 /* allows the interrupt handler to start the queue */
1396 wmb();
1397 h->drv[drv_index].queue = disk->queue;
1398 add_disk(disk);
1399}
1400
ddd47442 1401/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1402 * If the usage_count is zero and it is a heretofore unknown drive, or,
1403 * the drive's capacity, geometry, or serial number has changed,
1404 * then the drive information will be updated and the disk will be
1405 * re-registered with the kernel. If these conditions don't hold,
1406 * then it will be left alone for the next reboot. The exception to this
1407 * is disk 0 which will always be left registered with the kernel since it
1408 * is also the controller node. Any changes to disk 0 will show up on
1409 * the next reboot.
7c832835 1410 */
6ae5ce8e 1411static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
7c832835 1412{
ddd47442
MM		 1413 ctlr_info_t *h = hba[ctlr];
1414 struct gendisk *disk;
ddd47442
MM		 1415 InquiryData_struct *inq_buff = NULL;
1416 unsigned int block_size;
00988a35 1417 sector_t total_size;
ddd47442
MM		 1418 unsigned long flags = 0;
1419 int ret = 0;
a72da29b 1420 drive_info_struct *drvinfo;
6ae5ce8e 1421 int was_only_controller_node;
a72da29b
MM		 1422
1423 /* Get information about the disk and modify the driver structure */
1424 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1425 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1426 if (inq_buff == NULL || drvinfo == NULL)
1427 goto mem_msg;
1428
6ae5ce8e
MM		 1429 /* See if we're trying to update the "controller node"
1430 * this will happen the when the first logical drive gets
1431 * created by ACU.
1432 */
1433 was_only_controller_node = (drv_index == 0 &&
1434 h->drv[0].raid_level == -1);
1435
a72da29b
MM		 1436 /* testing to see if 16-byte CDBs are already being used */
1437 if (h->cciss_read == CCISS_READ_16) {
1438 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1439 &total_size, &block_size);
1440
1441 } else {
1442 cciss_read_capacity(ctlr, drv_index, 1,
1443 &total_size, &block_size);
1444
1445 /* if read_capacity returns all F's this volume is >2TB */
1446 /* in size so we switch to 16-byte CDB's for all */
1447 /* read/write ops */
1448 if (total_size == 0xFFFFFFFFULL) {
1449 cciss_read_capacity_16(ctlr, drv_index, 1,
1450 &total_size, &block_size);
1451 h->cciss_read = CCISS_READ_16;
1452 h->cciss_write = CCISS_WRITE_16;
1453 } else {
1454 h->cciss_read = CCISS_READ_10;
1455 h->cciss_write = CCISS_WRITE_10;
1456 }
1457 }
1458
1459 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1460 inq_buff, drvinfo);
1461 drvinfo->block_size = block_size;
1462 drvinfo->nr_blocks = total_size + 1;
1463
1464 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1465 sizeof(drvinfo->serial_no));
1466
1467 /* Is it the same disk we already know, and nothing's changed? */
1468 if (h->drv[drv_index].raid_level != -1 &&
1469 ((memcmp(drvinfo->serial_no,
1470 h->drv[drv_index].serial_no, 16) == 0) &&
1471 drvinfo->block_size == h->drv[drv_index].block_size &&
1472 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1473 drvinfo->heads == h->drv[drv_index].heads &&
1474 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1475 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1476 /* The disk is unchanged, nothing to update */
1477 goto freeret;
a72da29b 1478
6ae5ce8e
MM		 1479 /* If we get here it's not the same disk, or something's changed,
1480 * so we need to * deregister it, and re-register it, if it's not
1481 * in use.
1482 * If the disk already exists then deregister it before proceeding
1483 * (unless it's the first disk (for the controller node).
1484 */
a72da29b
MM		 1485 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1486 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1487 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1488 h->drv[drv_index].busy_configuring = 1;
1489 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1490
6ae5ce8e
MM		 1491 /* deregister_disk sets h->drv[drv_index].queue = NULL
1492 * which keeps the interrupt handler from starting
1493 * the queue.
1494 */
ddd47442 1495 ret = deregister_disk(h->gendisk[drv_index],
7c832835 1496 &h->drv[drv_index], 0);
ddd47442
MM		 1497 h->drv[drv_index].busy_configuring = 0;
1498 }
1499
1500 /* If the disk is in use return */
1501 if (ret)
a72da29b
MM		 1502 goto freeret;
1503
6ae5ce8e
MM		 1504 /* Save the new information from cciss_geometry_inquiry
1505 * and serial number inquiry.
1506 */
a72da29b
MM		 1507 h->drv[drv_index].block_size = drvinfo->block_size;
1508 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1509 h->drv[drv_index].heads = drvinfo->heads;
1510 h->drv[drv_index].sectors = drvinfo->sectors;
1511 h->drv[drv_index].cylinders = drvinfo->cylinders;
1512 h->drv[drv_index].raid_level = drvinfo->raid_level;
1513 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
ddd47442
MM		 1514
1515 ++h->num_luns;
1516 disk = h->gendisk[drv_index];
1517 set_capacity(disk, h->drv[drv_index].nr_blocks);
1518
6ae5ce8e
MM		 1519 /* If it's not disk 0 (drv_index != 0)
1520 * or if it was disk 0, but there was previously
1521 * no actual corresponding configured logical drive
1522 * (raid_leve == -1) then we want to update the
1523 * logical drive's information.
1524 */
1525 if (drv_index || first_time)
1526 cciss_add_disk(h, disk, drv_index);
ddd47442 1527
6ae5ce8e 1528freeret:
ddd47442 1529 kfree(inq_buff);
a72da29b 1530 kfree(drvinfo);
ddd47442 1531 return;
6ae5ce8e 1532mem_msg:
ddd47442
MM		 1533 printk(KERN_ERR "cciss: out of memory\n");
1534 goto freeret;
1535}
1536
1537/* This function will find the first index of the controllers drive array
1538 * that has a -1 for the raid_level and will return that index. This is
1539 * where new drives will be added. If the index to be returned is greater
1540 * than the highest_lun index for the controller then highest_lun is set
1541 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1542 * "controller_node" is used to know if this is a real logical drive, or just
1543 * the controller node, which determines if this counts towards highest_lun.
7c832835 1544 */
eece695f 1545static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1546{
1547 int i;
1548
7c832835
BH		 1549 for (i = 0; i < CISS_MAX_LUN; i++) {
1550 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1551 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1552 if (!controller_node)
1553 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1554 return i;
1555 }
1556 }
1557 return -1;
1558}
1559
6ae5ce8e
MM		 1560/* cciss_add_gendisk finds a free hba[]->drv structure
1561 * and allocates a gendisk if needed, and sets the lunid
1562 * in the drvinfo structure. It returns the index into
1563 * the ->drv[] array, or -1 if none are free.
1564 * is_controller_node indicates whether highest_lun should
1565 * count this disk, or if it's only being added to provide
1566 * a means to talk to the controller in case no logical
1567 * drives have yet been configured.
1568 */
eece695f 1569static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
6ae5ce8e
MM		 1570{
1571 int drv_index;
1572
eece695f 1573 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1574 if (drv_index == -1)
1575 return -1;
1576 /*Check if the gendisk needs to be allocated */
1577 if (!h->gendisk[drv_index]) {
1578 h->gendisk[drv_index] =
1579 alloc_disk(1 << NWD_SHIFT);
1580 if (!h->gendisk[drv_index]) {
1581 printk(KERN_ERR "cciss%d: could not "
1582 "allocate a new disk %d\n",
1583 h->ctlr, drv_index);
1584 return -1;
1585 }
1586 }
1587 h->drv[drv_index].LunID = lunid;
1588
1589 /* Don't need to mark this busy because nobody */
1590 /* else knows about this disk yet to contend */
1591 /* for access to it. */
1592 h->drv[drv_index].busy_configuring = 0;
1593 wmb();
1594 return drv_index;
1595}
1596
1597/* This is for the special case of a controller which
1598 * has no logical drives. In this case, we still need
1599 * to register a disk so the controller can be accessed
1600 * by the Array Config Utility.
1601 */
1602static void cciss_add_controller_node(ctlr_info_t *h)
1603{
1604 struct gendisk *disk;
1605 int drv_index;
1606
1607 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1608 return;
1609
eece695f 1610 drv_index = cciss_add_gendisk(h, 0, 1);
6ae5ce8e
MM		 1611 if (drv_index == -1) {
1612 printk(KERN_WARNING "cciss%d: could not "
1613 "add disk 0.\n", h->ctlr);
1614 return;
1615 }
1616 h->drv[drv_index].block_size = 512;
1617 h->drv[drv_index].nr_blocks = 0;
1618 h->drv[drv_index].heads = 0;
1619 h->drv[drv_index].sectors = 0;
1620 h->drv[drv_index].cylinders = 0;
1621 h->drv[drv_index].raid_level = -1;
1622 memset(h->drv[drv_index].serial_no, 0, 16);
1623 disk = h->gendisk[drv_index];
1624 cciss_add_disk(h, disk, drv_index);
1625}
1626
ddd47442 1627/* This function will add and remove logical drives from the Logical
d14c4ab5 1628 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 1629 * so that mount points are preserved until the next reboot. This allows
1630 * for the removal of logical drives in the middle of the drive array
1631 * without a re-ordering of those drives.
1632 * INPUT
1633 * h = The controller to perform the operations on
7c832835 1634 */
6ae5ce8e 1635static int rebuild_lun_table(ctlr_info_t *h, int first_time)
1da177e4 1636{
ddd47442
MM		 1637 int ctlr = h->ctlr;
1638 int num_luns;
1639 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 1640 int return_code;
1641 int listlength = 0;
1642 int i;
1643 int drv_found;
1644 int drv_index = 0;
1645 __u32 lunid = 0;
1da177e4 1646 unsigned long flags;
ddd47442 1647
6ae5ce8e
MM		 1648 if (!capable(CAP_SYS_RAWIO))
1649 return -EPERM;
1650
ddd47442
MM		 1651 /* Set busy_configuring flag for this operation */
1652 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 1653 if (h->busy_configuring) {
ddd47442
MM		 1654 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1655 return -EBUSY;
1656 }
1657 h->busy_configuring = 1;
a72da29b 1658 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 1659
a72da29b
MM		 1660 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1661 if (ld_buff == NULL)
1662 goto mem_msg;
1663
1664 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
1665 sizeof(ReportLunData_struct), 0,
1666 0, 0, TYPE_CMD);
ddd47442 1667
a72da29b
MM		 1668 if (return_code == IO_OK)
1669 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
1670 else { /* reading number of logical volumes failed */
1671 printk(KERN_WARNING "cciss: report logical volume"
1672 " command failed\n");
1673 listlength = 0;
1674 goto freeret;
1675 }
1676
1677 num_luns = listlength / 8; /* 8 bytes per entry */
1678 if (num_luns > CISS_MAX_LUN) {
1679 num_luns = CISS_MAX_LUN;
1680 printk(KERN_WARNING "cciss: more luns configured"
1681 " on controller than can be handled by"
1682 " this driver.\n");
1683 }
1684
6ae5ce8e
MM		 1685 if (num_luns == 0)
1686 cciss_add_controller_node(h);
1687
1688 /* Compare controller drive array to driver's drive array
1689 * to see if any drives are missing on the controller due
1690 * to action of Array Config Utility (user deletes drive)
1691 * and deregister logical drives which have disappeared.
1692 */
a72da29b
MM		 1693 for (i = 0; i <= h->highest_lun; i++) {
1694 int j;
1695 drv_found = 0;
1696 for (j = 0; j < num_luns; j++) {
1697 memcpy(&lunid, &ld_buff->LUN[j][0], 4);
1698 lunid = le32_to_cpu(lunid);
1699 if (h->drv[i].LunID == lunid) {
1700 drv_found = 1;
1701 break;
1702 }
1703 }
1704 if (!drv_found) {
1705 /* Deregister it from the OS, it's gone. */
1706 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1707 h->drv[i].busy_configuring = 1;
1708 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1709 return_code = deregister_disk(h->gendisk[i],
1710 &h->drv[i], 1);
1711 h->drv[i].busy_configuring = 0;
ddd47442 1712 }
a72da29b 1713 }
ddd47442 1714
a72da29b
MM		 1715 /* Compare controller drive array to driver's drive array.
1716 * Check for updates in the drive information and any new drives
1717 * on the controller due to ACU adding logical drives, or changing
1718 * a logical drive's size, etc. Reregister any new/changed drives
1719 */
1720 for (i = 0; i < num_luns; i++) {
1721 int j;
ddd47442 1722
a72da29b 1723 drv_found = 0;
ddd47442 1724
a72da29b
MM		 1725 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
1726 lunid = le32_to_cpu(lunid);
ddd47442 1727
a72da29b
MM		 1728 /* Find if the LUN is already in the drive array
1729 * of the driver. If so then update its info
1730 * if not in use. If it does not exist then find
1731 * the first free index and add it.
1732 */
1733 for (j = 0; j <= h->highest_lun; j++) {
1734 if (h->drv[j].raid_level != -1 &&
1735 h->drv[j].LunID == lunid) {
1736 drv_index = j;
1737 drv_found = 1;
1738 break;
ddd47442 1739 }
a72da29b 1740 }
ddd47442 1741
a72da29b
MM		 1742 /* check if the drive was found already in the array */
1743 if (!drv_found) {
eece695f 1744 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 1745 if (drv_index == -1)
1746 goto freeret;
a72da29b 1747 }
6ae5ce8e 1748 cciss_update_drive_info(ctlr, drv_index, first_time);
a72da29b 1749 } /* end for */
ddd47442 1750
6ae5ce8e 1751freeret:
ddd47442
MM		 1752 kfree(ld_buff);
1753 h->busy_configuring = 0;
1754 /* We return -1 here to tell the ACU that we have registered/updated
1755 * all of the drives that we can and to keep it from calling us
1756 * additional times.
7c832835 1757 */
ddd47442 1758 return -1;
6ae5ce8e 1759mem_msg:
ddd47442 1760 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 1761 h->busy_configuring = 0;
ddd47442
MM		 1762 goto freeret;
1763}
1764
1765/* This function will deregister the disk and it's queue from the
1766 * kernel. It must be called with the controller lock held and the
1767 * drv structures busy_configuring flag set. It's parameters are:
1768 *
1769 * disk = This is the disk to be deregistered
1770 * drv = This is the drive_info_struct associated with the disk to be
1771 * deregistered. It contains information about the disk used
1772 * by the driver.
1773 * clear_all = This flag determines whether or not the disk information
1774 * is going to be completely cleared out and the highest_lun
1775 * reset. Sometimes we want to clear out information about
d14c4ab5 1776 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 1777 * the highest_lun should be left unchanged and the LunID
1778 * should not be cleared.
1779*/
1780static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
1781 int clear_all)
1782{
799202cb 1783 int i;
1da177e4 1784 ctlr_info_t *h = get_host(disk);
1da177e4
LT		 1785
1786 if (!capable(CAP_SYS_RAWIO))
1787 return -EPERM;
1788
1da177e4 1789 /* make sure logical volume is NOT is use */
7c832835
BH		 1790 if (clear_all || (h->gendisk[0] == disk)) {
1791 if (drv->usage_count > 1)
1792 return -EBUSY;
1793 } else if (drv->usage_count > 0)
1794 return -EBUSY;
1da177e4 1795
ddd47442
MM		 1796 /* invalidate the devices and deregister the disk. If it is disk
1797 * zero do not deregister it but just zero out it's values. This
1798 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 1799 */
1800 if (h->gendisk[0] != disk) {
5a9df732
AB		 1801 struct request_queue *q = disk->queue;
1802 if (disk->flags & GENHD_FL_UP)
1803 del_gendisk(disk);
1804 if (q) {
1805 blk_cleanup_queue(q);
1806 /* Set drv->queue to NULL so that we do not try
1807 * to call blk_start_queue on this queue in the
1808 * interrupt handler
1809 */
1810 drv->queue = NULL;
1811 }
1812 /* If clear_all is set then we are deleting the logical
1813 * drive, not just refreshing its info. For drives
1814 * other than disk 0 we will call put_disk. We do not
1815 * do this for disk 0 as we need it to be able to
1816 * configure the controller.
a72da29b 1817 */
5a9df732
AB		 1818 if (clear_all){
1819 /* This isn't pretty, but we need to find the
1820 * disk in our array and NULL our the pointer.
1821 * This is so that we will call alloc_disk if
1822 * this index is used again later.
a72da29b 1823 */
5a9df732 1824 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 1825 if (h->gendisk[i] == disk) {
5a9df732
AB		 1826 h->gendisk[i] = NULL;
1827 break;
799202cb 1828 }
799202cb 1829 }
5a9df732 1830 put_disk(disk);
ddd47442 1831 }
799202cb
MM		 1832 } else {
1833 set_capacity(disk, 0);
ddd47442
MM		 1834 }
1835
1836 --h->num_luns;
1837 /* zero out the disk size info */
1838 drv->nr_blocks = 0;
1839 drv->block_size = 0;
1840 drv->heads = 0;
1841 drv->sectors = 0;
1842 drv->cylinders = 0;
1843 drv->raid_level = -1; /* This can be used as a flag variable to
1844 * indicate that this element of the drive
1845 * array is free.
7c832835
BH		 1846 */
1847
1848 if (clear_all) {
1849 /* check to see if it was the last disk */
1850 if (drv == h->drv + h->highest_lun) {
1851 /* if so, find the new hightest lun */
1852 int i, newhighest = -1;
a72da29b 1853 for (i = 0; i <= h->highest_lun; i++) {
7c832835 1854 /* if the disk has size > 0, it is available */
ddd47442 1855 if (h->drv[i].heads)
7c832835
BH		 1856 newhighest = i;
1857 }
1858 h->highest_lun = newhighest;
1da177e4 1859 }
ddd47442 1860
7c832835 1861 drv->LunID = 0;
ddd47442 1862 }
e2019b58 1863 return 0;
1da177e4 1864}
ddd47442 1865
7c832835
BH		 1866static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num, /* 0: address the controller,
1867 1: address logical volume log_unit,
1868 2: periph device address is scsi3addr */
1869 unsigned int log_unit, __u8 page_code,
1870 unsigned char *scsi3addr, int cmd_type)
1da177e4 1871{
7c832835 1872 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 1873 u64bit buff_dma_handle;
1874 int status = IO_OK;
1875
1876 c->cmd_type = CMD_IOCTL_PEND;
1877 c->Header.ReplyQueue = 0;
7c832835 1878 if (buff != NULL) {
1da177e4 1879 c->Header.SGList = 1;
7c832835 1880 c->Header.SGTotal = 1;
1da177e4
LT		 1881 } else {
1882 c->Header.SGList = 0;
7c832835 1883 c->Header.SGTotal = 0;
1da177e4
LT		 1884 }
1885 c->Header.Tag.lower = c->busaddr;
1886
1887 c->Request.Type.Type = cmd_type;
1888 if (cmd_type == TYPE_CMD) {
7c832835
BH		 1889 switch (cmd) {
1890 case CISS_INQUIRY:
1da177e4 1891 /* If the logical unit number is 0 then, this is going
7c832835
BH		 1892 to controller so It's a physical command
1893 mode = 0 target = 0. So we have nothing to write.
1894 otherwise, if use_unit_num == 1,
1895 mode = 1(volume set addressing) target = LUNID
1896 otherwise, if use_unit_num == 2,
1897 mode = 0(periph dev addr) target = scsi3addr */
1da177e4 1898 if (use_unit_num == 1) {
7c832835
BH		 1899 c->Header.LUN.LogDev.VolId =
1900 h->drv[log_unit].LunID;
1901 c->Header.LUN.LogDev.Mode = 1;
1da177e4 1902 } else if (use_unit_num == 2) {
7c832835
BH		 1903 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr,
1904 8);
1da177e4
LT		 1905 c->Header.LUN.LogDev.Mode = 0;
1906 }
1907 /* are we trying to read a vital product page */
7c832835 1908 if (page_code != 0) {
1da177e4
LT		 1909 c->Request.CDB[1] = 0x01;
1910 c->Request.CDB[2] = page_code;
1911 }
1912 c->Request.CDBLen = 6;
7c832835 1913 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 1914 c->Request.Type.Direction = XFER_READ;
1915 c->Request.Timeout = 0;
7c832835
BH		 1916 c->Request.CDB[0] = CISS_INQUIRY;
1917 c->Request.CDB[4] = size & 0xFF;
1918 break;
1da177e4
LT		 1919 case CISS_REPORT_LOG:
1920 case CISS_REPORT_PHYS:
7c832835 1921 /* Talking to controller so It's a physical command
1da177e4 1922 mode = 00 target = 0. Nothing to write.
7c832835 1923 */
1da177e4
LT		 1924 c->Request.CDBLen = 12;
1925 c->Request.Type.Attribute = ATTR_SIMPLE;
1926 c->Request.Type.Direction = XFER_READ;
1927 c->Request.Timeout = 0;
1928 c->Request.CDB[0] = cmd;
7c832835 1929 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 1930 c->Request.CDB[7] = (size >> 16) & 0xFF;
1931 c->Request.CDB[8] = (size >> 8) & 0xFF;
1932 c->Request.CDB[9] = size & 0xFF;
1933 break;
1934
1935 case CCISS_READ_CAPACITY:
1936 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1937 c->Header.LUN.LogDev.Mode = 1;
1938 c->Request.CDBLen = 10;
1939 c->Request.Type.Attribute = ATTR_SIMPLE;
1940 c->Request.Type.Direction = XFER_READ;
1941 c->Request.Timeout = 0;
1942 c->Request.CDB[0] = cmd;
7c832835 1943 break;
00988a35
MMOD		 1944 case CCISS_READ_CAPACITY_16:
1945 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1946 c->Header.LUN.LogDev.Mode = 1;
1947 c->Request.CDBLen = 16;
1948 c->Request.Type.Attribute = ATTR_SIMPLE;
1949 c->Request.Type.Direction = XFER_READ;
1950 c->Request.Timeout = 0;
1951 c->Request.CDB[0] = cmd;
1952 c->Request.CDB[1] = 0x10;
1953 c->Request.CDB[10] = (size >> 24) & 0xFF;
1954 c->Request.CDB[11] = (size >> 16) & 0xFF;
1955 c->Request.CDB[12] = (size >> 8) & 0xFF;
1956 c->Request.CDB[13] = size & 0xFF;
1957 c->Request.Timeout = 0;
1958 c->Request.CDB[0] = cmd;
1959 break;
1da177e4
LT		 1960 case CCISS_CACHE_FLUSH:
1961 c->Request.CDBLen = 12;
1962 c->Request.Type.Attribute = ATTR_SIMPLE;
1963 c->Request.Type.Direction = XFER_WRITE;
1964 c->Request.Timeout = 0;
1965 c->Request.CDB[0] = BMIC_WRITE;
1966 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 1967 break;
1da177e4
LT		 1968 default:
1969 printk(KERN_WARNING
7c832835 1970 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 1971 return IO_ERROR;
1da177e4
LT		 1972 }
1973 } else if (cmd_type == TYPE_MSG) {
1974 switch (cmd) {
7c832835 1975 case 0: /* ABORT message */
3da8b713 1976 c->Request.CDBLen = 12;
1977 c->Request.Type.Attribute = ATTR_SIMPLE;
1978 c->Request.Type.Direction = XFER_WRITE;
1979 c->Request.Timeout = 0;
7c832835
BH		 1980 c->Request.CDB[0] = cmd; /* abort */
1981 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 1982 /* buff contains the tag of the command to abort */
1983 memcpy(&c->Request.CDB[4], buff, 8);
1984 break;
7c832835 1985 case 1: /* RESET message */
3da8b713 1986 c->Request.CDBLen = 12;
1987 c->Request.Type.Attribute = ATTR_SIMPLE;
1988 c->Request.Type.Direction = XFER_WRITE;
1989 c->Request.Timeout = 0;
1990 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835
BH		 1991 c->Request.CDB[0] = cmd; /* reset */
1992 c->Request.CDB[1] = 0x04; /* reset a LUN */
00988a35 1993 break;
1da177e4
LT		 1994 case 3: /* No-Op message */
1995 c->Request.CDBLen = 1;
1996 c->Request.Type.Attribute = ATTR_SIMPLE;
1997 c->Request.Type.Direction = XFER_WRITE;
1998 c->Request.Timeout = 0;
1999 c->Request.CDB[0] = cmd;
2000 break;
2001 default:
2002 printk(KERN_WARNING
7c832835 2003 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2004 return IO_ERROR;
2005 }
2006 } else {
2007 printk(KERN_WARNING
7c832835 2008 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2009 return IO_ERROR;
2010 }
2011 /* Fill in the scatter gather information */
2012 if (size > 0) {
2013 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2014 buff, size,
2015 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2016 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2017 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2018 c->SG[0].Len = size;
7c832835 2019 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2020 }
2021 return status;
2022}
7c832835
BH		 2023
2024static int sendcmd_withirq(__u8 cmd,
2025 int ctlr,
2026 void *buff,
2027 size_t size,
2028 unsigned int use_unit_num,
2029 unsigned int log_unit, __u8 page_code, int cmd_type)
1da177e4
LT		 2030{
2031 ctlr_info_t *h = hba[ctlr];
2032 CommandList_struct *c;
7c832835 2033 u64bit buff_dma_handle;
1da177e4
LT		 2034 unsigned long flags;
2035 int return_status;
6e9a4738 2036 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 2037
2038 if ((c = cmd_alloc(h, 0)) == NULL)
1da177e4
LT		 2039 return -ENOMEM;
2040 return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
7c832835 2041 log_unit, page_code, NULL, cmd_type);
1da177e4
LT		 2042 if (return_status != IO_OK) {
2043 cmd_free(h, c, 0);
2044 return return_status;
2045 }
7c832835 2046 resend_cmd2:
1da177e4 2047 c->waiting = &wait;
7c832835 2048
1da177e4
LT		 2049 /* Put the request on the tail of the queue and send it */
2050 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
2051 addQ(&h->reqQ, c);
2052 h->Qdepth++;
2053 start_io(h);
2054 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
7c832835 2055
1da177e4
LT		 2056 wait_for_completion(&wait);
2057
7c832835
BH		 2058 if (c->err_info->CommandStatus != 0) { /* an error has occurred */
2059 switch (c->err_info->CommandStatus) {
2060 case CMD_TARGET_STATUS:
2061 printk(KERN_WARNING "cciss: cmd %p has "
2062 " completed with errors\n", c);
2063 if (c->err_info->ScsiStatus) {
2064 printk(KERN_WARNING "cciss: cmd %p "
2065 "has SCSI Status = %x\n",
2066 c, c->err_info->ScsiStatus);
2067 }
1da177e4
LT		 2068
2069 break;
7c832835
BH		 2070 case CMD_DATA_UNDERRUN:
2071 case CMD_DATA_OVERRUN:
1da177e4
LT		 2072 /* expected for inquire and report lun commands */
2073 break;
7c832835
BH		 2074 case CMD_INVALID:
2075 printk(KERN_WARNING "cciss: Cmd %p is "
2076 "reported invalid\n", c);
2077 return_status = IO_ERROR;
1da177e4 2078 break;
7c832835
BH		 2079 case CMD_PROTOCOL_ERR:
2080 printk(KERN_WARNING "cciss: cmd %p has "
2081 "protocol error \n", c);
2082 return_status = IO_ERROR;
1da177e4 2083 break;
7c832835
BH		 2084 case CMD_HARDWARE_ERR:
2085 printk(KERN_WARNING "cciss: cmd %p had "
2086 " hardware error\n", c);
2087 return_status = IO_ERROR;
1da177e4 2088 break;
7c832835
BH		 2089 case CMD_CONNECTION_LOST:
2090 printk(KERN_WARNING "cciss: cmd %p had "
2091 "connection lost\n", c);
2092 return_status = IO_ERROR;
1da177e4 2093 break;
7c832835
BH		 2094 case CMD_ABORTED:
2095 printk(KERN_WARNING "cciss: cmd %p was "
2096 "aborted\n", c);
2097 return_status = IO_ERROR;
1da177e4 2098 break;
7c832835
BH		 2099 case CMD_ABORT_FAILED:
2100 printk(KERN_WARNING "cciss: cmd %p reports "
2101 "abort failed\n", c);
2102 return_status = IO_ERROR;
2103 break;
2104 case CMD_UNSOLICITED_ABORT:
2105 printk(KERN_WARNING
2106 "cciss%d: unsolicited abort %p\n", ctlr, c);
2107 if (c->retry_count < MAX_CMD_RETRIES) {
2108 printk(KERN_WARNING
2109 "cciss%d: retrying %p\n", ctlr, c);
2110 c->retry_count++;
2111 /* erase the old error information */
2112 memset(c->err_info, 0,
2113 sizeof(ErrorInfo_struct));
2114 return_status = IO_OK;
2115 INIT_COMPLETION(wait);
2116 goto resend_cmd2;
2117 }
2118 return_status = IO_ERROR;
2119 break;
2120 default:
2121 printk(KERN_WARNING "cciss: cmd %p returned "
2122 "unknown status %x\n", c,
2123 c->err_info->CommandStatus);
2124 return_status = IO_ERROR;
1da177e4 2125 }
7c832835 2126 }
1da177e4 2127 /* unlock the buffers from DMA */
bb2a37bf
MM		 2128 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2129 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2130 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2131 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
1da177e4 2132 cmd_free(h, c, 0);
7c832835 2133 return return_status;
1da177e4 2134}
7c832835 2135
1da177e4 2136static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2137 int withirq, sector_t total_size,
7c832835
BH		 2138 unsigned int block_size,
2139 InquiryData_struct *inq_buff,
2140 drive_info_struct *drv)
1da177e4
LT		 2141{
2142 int return_code;
00988a35 2143 unsigned long t;
00988a35 2144
1da177e4
LT		 2145 memset(inq_buff, 0, sizeof(InquiryData_struct));
2146 if (withirq)
2147 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
7c832835
BH		 2148 inq_buff, sizeof(*inq_buff), 1,
2149 logvol, 0xC1, TYPE_CMD);
1da177e4
LT		 2150 else
2151 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
7c832835
BH		 2152 sizeof(*inq_buff), 1, logvol, 0xC1, NULL,
2153 TYPE_CMD);
1da177e4 2154 if (return_code == IO_OK) {
7c832835 2155 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2156 printk(KERN_WARNING
7c832835
BH		 2157 "cciss: reading geometry failed, volume "
2158 "does not support reading geometry\n");
1da177e4 2159 drv->heads = 255;
7c832835 2160 drv->sectors = 32; // Sectors per track
7f42d3b8 2161 drv->cylinders = total_size + 1;
89f97ad1 2162 drv->raid_level = RAID_UNKNOWN;
1da177e4 2163 } else {
1da177e4
LT		 2164 drv->heads = inq_buff->data_byte[6];
2165 drv->sectors = inq_buff->data_byte[7];
2166 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2167 drv->cylinders += inq_buff->data_byte[5];
2168 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2169 }
2170 drv->block_size = block_size;
97c06978 2171 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2172 t = drv->heads * drv->sectors;
2173 if (t > 1) {
97c06978
MMOD		 2174 sector_t real_size = total_size + 1;
2175 unsigned long rem = sector_div(real_size, t);
3f7705ea 2176 if (rem)
97c06978
MMOD		 2177 real_size++;
2178 drv->cylinders = real_size;
1da177e4 2179 }
7c832835 2180 } else { /* Get geometry failed */
1da177e4
LT		 2181 printk(KERN_WARNING "cciss: reading geometry failed\n");
2182 }
cc088d10 2183 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
7c832835 2184 drv->heads, drv->sectors, drv->cylinders);
1da177e4 2185}
7c832835 2186
1da177e4 2187static void
00988a35 2188cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2189 unsigned int *block_size)
1da177e4 2190{
00988a35 2191 ReadCapdata_struct *buf;
1da177e4 2192 int return_code;
1aebe187
MK		 2193
2194 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2195 if (!buf) {
00988a35
MMOD		 2196 printk(KERN_WARNING "cciss: out of memory\n");
2197 return;
2198 }
1aebe187 2199
1da177e4
LT		 2200 if (withirq)
2201 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35
MMOD		 2202 ctlr, buf, sizeof(ReadCapdata_struct),
2203 1, logvol, 0, TYPE_CMD);
1da177e4
LT		 2204 else
2205 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35
MMOD		 2206 ctlr, buf, sizeof(ReadCapdata_struct),
2207 1, logvol, 0, NULL, TYPE_CMD);
1da177e4 2208 if (return_code == IO_OK) {
4c1f2b31
AV		 2209 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2210 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2211 } else { /* read capacity command failed */
1da177e4
LT		 2212 printk(KERN_WARNING "cciss: read capacity failed\n");
2213 *total_size = 0;
2214 *block_size = BLOCK_SIZE;
2215 }
97c06978 2216 if (*total_size != 0)
7b92aadf 2217 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2218 (unsigned long long)*total_size+1, *block_size);
00988a35 2219 kfree(buf);
00988a35
MMOD		 2220}
2221
2222static void
2223cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2224{
2225 ReadCapdata_struct_16 *buf;
2226 int return_code;
1aebe187
MK		 2227
2228 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2229 if (!buf) {
00988a35
MMOD		 2230 printk(KERN_WARNING "cciss: out of memory\n");
2231 return;
2232 }
1aebe187 2233
00988a35
MMOD		 2234 if (withirq) {
2235 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2236 ctlr, buf, sizeof(ReadCapdata_struct_16),
2237 1, logvol, 0, TYPE_CMD);
2238 }
2239 else {
2240 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2241 ctlr, buf, sizeof(ReadCapdata_struct_16),
2242 1, logvol, 0, NULL, TYPE_CMD);
2243 }
2244 if (return_code == IO_OK) {
4c1f2b31
AV		 2245 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2246 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2247 } else { /* read capacity command failed */
2248 printk(KERN_WARNING "cciss: read capacity failed\n");
2249 *total_size = 0;
2250 *block_size = BLOCK_SIZE;
2251 }
7b92aadf 2252 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2253 (unsigned long long)*total_size+1, *block_size);
00988a35 2254 kfree(buf);
1da177e4
LT		 2255}
2256
1da177e4
LT		 2257static int cciss_revalidate(struct gendisk *disk)
2258{
2259 ctlr_info_t *h = get_host(disk);
2260 drive_info_struct *drv = get_drv(disk);
2261 int logvol;
7c832835 2262 int FOUND = 0;
1da177e4 2263 unsigned int block_size;
00988a35 2264 sector_t total_size;
1da177e4
LT		 2265 InquiryData_struct *inq_buff = NULL;
2266
7c832835
BH		 2267 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2268 if (h->drv[logvol].LunID == drv->LunID) {
2269 FOUND = 1;
1da177e4
LT		 2270 break;
2271 }
2272 }
2273
7c832835
BH		 2274 if (!FOUND)
2275 return 1;
1da177e4 2276
7c832835
BH		 2277 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2278 if (inq_buff == NULL) {
2279 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2280 return 1;
2281 }
00988a35
MMOD		 2282 if (h->cciss_read == CCISS_READ_10) {
2283 cciss_read_capacity(h->ctlr, logvol, 1,
2284 &total_size, &block_size);
2285 } else {
2286 cciss_read_capacity_16(h->ctlr, logvol, 1,
2287 &total_size, &block_size);
2288 }
7c832835
BH		 2289 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2290 inq_buff, drv);
1da177e4 2291
ad2b9312 2292 blk_queue_hardsect_size(drv->queue, drv->block_size);
1da177e4
LT		 2293 set_capacity(disk, drv->nr_blocks);
2294
1da177e4
LT		 2295 kfree(inq_buff);
2296 return 0;
2297}
2298
2299/*
2300 * Wait polling for a command to complete.
2301 * The memory mapped FIFO is polled for the completion.
2302 * Used only at init time, interrupts from the HBA are disabled.
2303 */
2304static unsigned long pollcomplete(int ctlr)
2305{
2306 unsigned long done;
2307 int i;
2308
2309 /* Wait (up to 20 seconds) for a command to complete */
2310
2311 for (i = 20 * HZ; i > 0; i--) {
2312 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2313 if (done == FIFO_EMPTY)
2314 schedule_timeout_uninterruptible(1);
2315 else
e2019b58 2316 return done;
1da177e4
LT		 2317 }
2318 /* Invalid address to tell caller we ran out of time */
2319 return 1;
2320}
3da8b713 2321
2322static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
2323{
2324 /* We get in here if sendcmd() is polling for completions
7c832835
BH		 2325 and gets some command back that it wasn't expecting --
2326 something other than that which it just sent down.
2327 Ordinarily, that shouldn't happen, but it can happen when
3da8b713 2328 the scsi tape stuff gets into error handling mode, and
7c832835 2329 starts using sendcmd() to try to abort commands and
3da8b713 2330 reset tape drives. In that case, sendcmd may pick up
2331 completions of commands that were sent to logical drives
7c832835 2332 through the block i/o system, or cciss ioctls completing, etc.
3da8b713 2333 In that case, we need to save those completions for later
2334 processing by the interrupt handler.
7c832835 2335 */
3da8b713 2336
2337#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 2338 struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
3da8b713 2339
2340 /* If it's not the scsi tape stuff doing error handling, (abort */
2341 /* or reset) then we don't expect anything weird. */
2342 if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
2343#endif
7c832835
BH		 2344 printk(KERN_WARNING "cciss cciss%d: SendCmd "
2345 "Invalid command list address returned! (%lx)\n",
2346 ctlr, complete);
3da8b713 2347 /* not much we can do. */
2348#ifdef CONFIG_CISS_SCSI_TAPE
2349 return 1;
2350 }
2351
2352 /* We've sent down an abort or reset, but something else
2353 has completed */
f880632f 2354 if (srl->ncompletions >= (hba[ctlr]->nr_cmds + 2)) {
3da8b713 2355 /* Uh oh. No room to save it for later... */
2356 printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
7c832835 2357 "reject list overflow, command lost!\n", ctlr);
3da8b713 2358 return 1;
2359 }
2360 /* Save it for later */
2361 srl->complete[srl->ncompletions] = complete;
2362 srl->ncompletions++;
2363#endif
2364 return 0;
2365}
2366
1da177e4 2367/*
7c832835
BH		 2368 * Send a command to the controller, and wait for it to complete.
2369 * Only used at init time.
1da177e4 2370 */
7c832835
BH		 2371static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num, /* 0: address the controller,
2372 1: address logical volume log_unit,
2373 2: periph device address is scsi3addr */
2374 unsigned int log_unit,
2375 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
1da177e4
LT		 2376{
2377 CommandList_struct *c;
2378 int i;
2379 unsigned long complete;
7c832835 2380 ctlr_info_t *info_p = hba[ctlr];
1da177e4 2381 u64bit buff_dma_handle;
3da8b713 2382 int status, done = 0;
1da177e4
LT		 2383
2384 if ((c = cmd_alloc(info_p, 1)) == NULL) {
2385 printk(KERN_WARNING "cciss: unable to get memory");
e2019b58 2386 return IO_ERROR;
1da177e4
LT		 2387 }
2388 status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
7c832835 2389 log_unit, page_code, scsi3addr, cmd_type);
1da177e4
LT		 2390 if (status != IO_OK) {
2391 cmd_free(info_p, c, 1);
2392 return status;
2393 }
7c832835 2394 resend_cmd1:
1da177e4 2395 /*
7c832835
BH		 2396 * Disable interrupt
2397 */
1da177e4
LT		 2398#ifdef CCISS_DEBUG
2399 printk(KERN_DEBUG "cciss: turning intr off\n");
7c832835
BH		 2400#endif /* CCISS_DEBUG */
2401 info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);
2402
1da177e4 2403 /* Make sure there is room in the command FIFO */
7c832835 2404 /* Actually it should be completely empty at this time */
3da8b713 2405 /* unless we are in here doing error handling for the scsi */
2406 /* tape side of the driver. */
7c832835 2407 for (i = 200000; i > 0; i--) {
1da177e4 2408 /* if fifo isn't full go */
7c832835
BH		 2409 if (!(info_p->access.fifo_full(info_p))) {
2410
2411 break;
2412 }
2413 udelay(10);
2414 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
2415 " waiting!\n", ctlr);
2416 }
2417 /*
2418 * Send the cmd
2419 */
2420 info_p->access.submit_command(info_p, c);
3da8b713 2421 done = 0;
2422 do {
2423 complete = pollcomplete(ctlr);
1da177e4
LT		 2424
2425#ifdef CCISS_DEBUG
3da8b713 2426 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2427#endif /* CCISS_DEBUG */
1da177e4 2428
3da8b713 2429 if (complete == 1) {
7c832835
BH		 2430 printk(KERN_WARNING
2431 "cciss cciss%d: SendCmd Timeout out, "
2432 "No command list address returned!\n", ctlr);
3da8b713 2433 status = IO_ERROR;
2434 done = 1;
2435 break;
2436 }
2437
2438 /* This will need to change for direct lookup completions */
7c832835
BH		 2439 if ((complete & CISS_ERROR_BIT)
2440 && (complete & ~CISS_ERROR_BIT) == c->busaddr) {
2441 /* if data overrun or underun on Report command
2442 ignore it
2443 */
1da177e4
LT		 2444 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2445 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2446 (c->Request.CDB[0] == CISS_INQUIRY)) &&
7c832835
BH		 2447 ((c->err_info->CommandStatus ==
2448 CMD_DATA_OVERRUN) ||
2449 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN)
2450 )) {
1da177e4
LT		 2451 complete = c->busaddr;
2452 } else {
2453 if (c->err_info->CommandStatus ==
7c832835 2454 CMD_UNSOLICITED_ABORT) {
1da177e4 2455 printk(KERN_WARNING "cciss%d: "
7c832835
BH		 2456 "unsolicited abort %p\n",
2457 ctlr, c);
1da177e4
LT		 2458 if (c->retry_count < MAX_CMD_RETRIES) {
2459 printk(KERN_WARNING
7c832835
BH		 2460 "cciss%d: retrying %p\n",
2461 ctlr, c);
1da177e4
LT		 2462 c->retry_count++;
2463 /* erase the old error */
2464 /* information */
2465 memset(c->err_info, 0,
7c832835
BH		 2466 sizeof
2467 (ErrorInfo_struct));
1da177e4
LT		 2468 goto resend_cmd1;
2469 } else {
2470 printk(KERN_WARNING
7c832835
BH		 2471 "cciss%d: retried %p too "
2472 "many times\n", ctlr, c);
1da177e4
LT		 2473 status = IO_ERROR;
2474 goto cleanup1;
2475 }
7c832835
BH		 2476 } else if (c->err_info->CommandStatus ==
2477 CMD_UNABORTABLE) {
2478 printk(KERN_WARNING
2479 "cciss%d: command could not be aborted.\n",
2480 ctlr);
3da8b713 2481 status = IO_ERROR;
2482 goto cleanup1;
1da177e4
LT		 2483 }
2484 printk(KERN_WARNING "ciss ciss%d: sendcmd"
7c832835
BH		 2485 " Error %x \n", ctlr,
2486 c->err_info->CommandStatus);
1da177e4 2487 printk(KERN_WARNING "ciss ciss%d: sendcmd"
7c832835
BH		 2488 " offensive info\n"
2489 " size %x\n num %x value %x\n",
2490 ctlr,
2491 c->err_info->MoreErrInfo.Invalid_Cmd.
2492 offense_size,
2493 c->err_info->MoreErrInfo.Invalid_Cmd.
2494 offense_num,
2495 c->err_info->MoreErrInfo.Invalid_Cmd.
2496 offense_value);
1da177e4
LT		 2497 status = IO_ERROR;
2498 goto cleanup1;
2499 }
2500 }
3da8b713 2501 /* This will need changing for direct lookup completions */
7c832835 2502 if (complete != c->busaddr) {
3da8b713 2503 if (add_sendcmd_reject(cmd, ctlr, complete) != 0) {
7c832835 2504 BUG(); /* we are pretty much hosed if we get here. */
3da8b713 2505 }
2506 continue;
7c832835 2507 } else
3da8b713 2508 done = 1;
7c832835
BH		 2509 } while (!done);
2510
2511 cleanup1:
1da177e4 2512 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2513 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2514 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
1da177e4 2515 pci_unmap_single(info_p->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2516 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
3da8b713 2517#ifdef CONFIG_CISS_SCSI_TAPE
2518 /* if we saved some commands for later, process them now. */
2519 if (info_p->scsi_rejects.ncompletions > 0)
7d12e780 2520 do_cciss_intr(0, info_p);
3da8b713 2521#endif
1da177e4 2522 cmd_free(info_p, c, 1);
e2019b58 2523 return status;
7c832835
BH		 2524}
2525
1da177e4
LT		 2526/*
2527 * Map (physical) PCI mem into (virtual) kernel space
2528 */
2529static void __iomem *remap_pci_mem(ulong base, ulong size)
2530{
7c832835
BH		 2531 ulong page_base = ((ulong) base) & PAGE_MASK;
2532 ulong page_offs = ((ulong) base) - page_base;
2533 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2534
7c832835 2535 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2536}
2537
7c832835
BH		 2538/*
2539 * Takes jobs of the Q and sends them to the hardware, then puts it on
2540 * the Q to wait for completion.
2541 */
2542static void start_io(ctlr_info_t *h)
1da177e4
LT		 2543{
2544 CommandList_struct *c;
7c832835
BH		 2545
2546 while ((c = h->reqQ) != NULL) {
1da177e4
LT		 2547 /* can't do anything if fifo is full */
2548 if ((h->access.fifo_full(h))) {
2549 printk(KERN_WARNING "cciss: fifo full\n");
2550 break;
2551 }
2552
7c832835 2553 /* Get the first entry from the Request Q */
1da177e4
LT		 2554 removeQ(&(h->reqQ), c);
2555 h->Qdepth--;
7c832835
BH		 2556
2557 /* Tell the controller execute command */
1da177e4 2558 h->access.submit_command(h, c);
7c832835
BH		 2559
2560 /* Put job onto the completed Q */
2561 addQ(&(h->cmpQ), c);
1da177e4
LT		 2562 }
2563}
7c832835 2564
1da177e4
LT		 2565/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2566/* Zeros out the error record and then resends the command back */
2567/* to the controller */
7c832835 2568static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2569{
2570 /* erase the old error information */
2571 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2572
2573 /* add it to software queue and then send it to the controller */
7c832835 2574 addQ(&(h->reqQ), c);
1da177e4 2575 h->Qdepth++;
7c832835 2576 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2577 h->maxQsinceinit = h->Qdepth;
2578
2579 start_io(h);
2580}
a9925a06 2581
1a614f50
SC		 2582static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2583 unsigned int msg_byte, unsigned int host_byte,
2584 unsigned int driver_byte)
2585{
2586 /* inverse of macros in scsi.h */
2587 return (scsi_status_byte & 0xff) |
2588 ((msg_byte & 0xff) << 8) |
2589 ((host_byte & 0xff) << 16) |
2590 ((driver_byte & 0xff) << 24);
2591}
2592
03bbfee5
MMOD		 2593static inline int evaluate_target_status(CommandList_struct *cmd)
2594{
2595 unsigned char sense_key;
1a614f50
SC		 2596 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2597 int error_value;
2598
2599 /* If we get in here, it means we got "target status", that is, scsi status */
2600 status_byte = cmd->err_info->ScsiStatus;
2601 driver_byte = DRIVER_OK;
2602 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2603
2604 if (blk_pc_request(cmd->rq))
2605 host_byte = DID_PASSTHROUGH;
2606 else
2607 host_byte = DID_OK;
2608
2609 error_value = make_status_bytes(status_byte, msg_byte,
2610 host_byte, driver_byte);
03bbfee5 2611
1a614f50 2612 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2613 if (!blk_pc_request(cmd->rq))
2614 printk(KERN_WARNING "cciss: cmd %p "
2615 "has SCSI Status 0x%x\n",
2616 cmd, cmd->err_info->ScsiStatus);
1a614f50 2617 return error_value;
03bbfee5
MMOD		 2618 }
2619
2620 /* check the sense key */
2621 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2622 /* no status or recovered error */
1a614f50
SC		 2623 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2624 error_value = 0;
03bbfee5
MMOD		 2625
2626 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2627 if (error_value != 0)
03bbfee5
MMOD		 2628 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2629 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2630 return error_value;
03bbfee5
MMOD		 2631 }
2632
2633 /* SG_IO or similar, copy sense data back */
2634 if (cmd->rq->sense) {
2635 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2636 cmd->rq->sense_len = cmd->err_info->SenseLen;
2637 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2638 cmd->rq->sense_len);
2639 } else
2640 cmd->rq->sense_len = 0;
2641
1a614f50 2642 return error_value;
03bbfee5
MMOD		 2643}
2644
7c832835 2645/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 2646 * buffers for the completed job. Note that this function does not need
2647 * to hold the hba/queue lock.
7c832835
BH		 2648 */
2649static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2650 int timeout)
1da177e4 2651{
1da177e4 2652 int retry_cmd = 0;
198b7660
MMOD		 2653 struct request *rq = cmd->rq;
2654
2655 rq->errors = 0;
7c832835 2656
1da177e4 2657 if (timeout)
1a614f50 2658 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 2659
d38ae168
MMOD		 2660 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2661 goto after_error_processing;
7c832835 2662
d38ae168 2663 switch (cmd->err_info->CommandStatus) {
d38ae168 2664 case CMD_TARGET_STATUS:
198b7660 2665 rq->errors = evaluate_target_status(cmd);
d38ae168
MMOD		 2666 break;
2667 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 2668 if (blk_fs_request(cmd->rq)) {
2669 printk(KERN_WARNING "cciss: cmd %p has"
2670 " completed with data underrun "
2671 "reported\n", cmd);
2672 cmd->rq->data_len = cmd->err_info->ResidualCnt;
2673 }
d38ae168
MMOD		 2674 break;
2675 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 2676 if (blk_fs_request(cmd->rq))
2677 printk(KERN_WARNING "cciss: cmd %p has"
2678 " completed with data overrun "
2679 "reported\n", cmd);
d38ae168
MMOD		 2680 break;
2681 case CMD_INVALID:
2682 printk(KERN_WARNING "cciss: cmd %p is "
2683 "reported invalid\n", cmd);
1a614f50
SC		 2684 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2685 cmd->err_info->CommandStatus, DRIVER_OK,
2686 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2687 break;
2688 case CMD_PROTOCOL_ERR:
2689 printk(KERN_WARNING "cciss: cmd %p has "
2690 "protocol error \n", cmd);
1a614f50
SC		 2691 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2692 cmd->err_info->CommandStatus, DRIVER_OK,
2693 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2694 break;
2695 case CMD_HARDWARE_ERR:
2696 printk(KERN_WARNING "cciss: cmd %p had "
2697 " hardware error\n", cmd);
1a614f50
SC		 2698 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2699 cmd->err_info->CommandStatus, DRIVER_OK,
2700 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2701 break;
2702 case CMD_CONNECTION_LOST:
2703 printk(KERN_WARNING "cciss: cmd %p had "
2704 "connection lost\n", cmd);
1a614f50
SC		 2705 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2706 cmd->err_info->CommandStatus, DRIVER_OK,
2707 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2708 break;
2709 case CMD_ABORTED:
2710 printk(KERN_WARNING "cciss: cmd %p was "
2711 "aborted\n", cmd);
1a614f50
SC		 2712 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2713 cmd->err_info->CommandStatus, DRIVER_OK,
2714 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 2715 break;
2716 case CMD_ABORT_FAILED:
2717 printk(KERN_WARNING "cciss: cmd %p reports "
2718 "abort failed\n", cmd);
1a614f50
SC		 2719 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2720 cmd->err_info->CommandStatus, DRIVER_OK,
2721 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2722 break;
2723 case CMD_UNSOLICITED_ABORT:
2724 printk(KERN_WARNING "cciss%d: unsolicited "
2725 "abort %p\n", h->ctlr, cmd);
2726 if (cmd->retry_count < MAX_CMD_RETRIES) {
2727 retry_cmd = 1;
2728 printk(KERN_WARNING
2729 "cciss%d: retrying %p\n", h->ctlr, cmd);
2730 cmd->retry_count++;
2731 } else
2732 printk(KERN_WARNING
2733 "cciss%d: %p retried too "
2734 "many times\n", h->ctlr, cmd);
1a614f50
SC		 2735 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2736 cmd->err_info->CommandStatus, DRIVER_OK,
2737 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 2738 break;
2739 case CMD_TIMEOUT:
2740 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 2741 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2742 cmd->err_info->CommandStatus, DRIVER_OK,
2743 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2744 break;
2745 default:
2746 printk(KERN_WARNING "cciss: cmd %p returned "
2747 "unknown status %x\n", cmd,
2748 cmd->err_info->CommandStatus);
1a614f50
SC		 2749 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2750 cmd->err_info->CommandStatus, DRIVER_OK,
2751 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 2752 }
d38ae168
MMOD		 2753
2754after_error_processing:
2755
1da177e4 2756 /* We need to return this command */
7c832835
BH		 2757 if (retry_cmd) {
2758 resend_cciss_cmd(h, cmd);
1da177e4 2759 return;
7c832835 2760 }
03bbfee5 2761 cmd->rq->completion_data = cmd;
a9925a06 2762 blk_complete_request(cmd->rq);
1da177e4
LT		 2763}
2764
7c832835
BH		 2765/*
2766 * Get a request and submit it to the controller.
1da177e4 2767 */
165125e1 2768static void do_cciss_request(struct request_queue *q)
1da177e4 2769{
7c832835 2770 ctlr_info_t *h = q->queuedata;
1da177e4 2771 CommandList_struct *c;
00988a35
MMOD		 2772 sector_t start_blk;
2773 int seg;
1da177e4
LT		 2774 struct request *creq;
2775 u64bit temp64;
2776 struct scatterlist tmp_sg[MAXSGENTRIES];
2777 drive_info_struct *drv;
2778 int i, dir;
2779
2780 /* We call start_io here in case there is a command waiting on the
2781 * queue that has not been sent.
7c832835 2782 */
1da177e4
LT		 2783 if (blk_queue_plugged(q))
2784 goto startio;
2785
7c832835 2786 queue:
1da177e4
LT		 2787 creq = elv_next_request(q);
2788 if (!creq)
2789 goto startio;
2790
089fe1b2 2791 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 2792
7c832835 2793 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 2794 goto full;
2795
2796 blkdev_dequeue_request(creq);
2797
2798 spin_unlock_irq(q->queue_lock);
2799
2800 c->cmd_type = CMD_RWREQ;
2801 c->rq = creq;
7c832835
BH		 2802
2803 /* fill in the request */
1da177e4 2804 drv = creq->rq_disk->private_data;
7c832835 2805 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 2806 /* got command from pool, so use the command block index instead */
2807 /* for direct lookups. */
2808 /* The first 2 bits are reserved for controller error reporting. */
2809 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835
BH		 2810 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
2811 c->Header.LUN.LogDev.VolId = drv->LunID;
1da177e4 2812 c->Header.LUN.LogDev.Mode = 1;
7c832835
BH		 2813 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
2814 c->Request.Type.Type = TYPE_CMD; // It is a command.
2815 c->Request.Type.Attribute = ATTR_SIMPLE;
2816 c->Request.Type.Direction =
a52de245 2817 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 2818 c->Request.Timeout = 0; // Don't time out
2819 c->Request.CDB[0] =
00988a35 2820 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
1da177e4
LT		 2821 start_blk = creq->sector;
2822#ifdef CCISS_DEBUG
7c832835
BH		 2823 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", (int)creq->sector,
2824 (int)creq->nr_sectors);
2825#endif /* CCISS_DEBUG */
1da177e4 2826
45711f1a 2827 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 2828 seg = blk_rq_map_sg(q, creq, tmp_sg);
2829
7c832835 2830 /* get the DMA records for the setup */
1da177e4
LT		 2831 if (c->Request.Type.Direction == XFER_READ)
2832 dir = PCI_DMA_FROMDEVICE;
2833 else
2834 dir = PCI_DMA_TODEVICE;
2835
7c832835 2836 for (i = 0; i < seg; i++) {
1da177e4 2837 c->SG[i].Len = tmp_sg[i].length;
45711f1a 2838 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 2839 tmp_sg[i].offset,
2840 tmp_sg[i].length, dir);
1da177e4 2841 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 2842 c->SG[i].Addr.upper = temp64.val32.upper;
2843 c->SG[i].Ext = 0; // we are not chaining
1da177e4 2844 }
7c832835
BH		 2845 /* track how many SG entries we are using */
2846 if (seg > h->maxSG)
2847 h->maxSG = seg;
1da177e4
LT		 2848
2849#ifdef CCISS_DEBUG
9f92f471 2850 printk(KERN_DEBUG "cciss: Submitting %lu sectors in %d segments\n",
7c832835
BH		 2851 creq->nr_sectors, seg);
2852#endif /* CCISS_DEBUG */
1da177e4
LT		 2853
2854 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 2855 if (likely(blk_fs_request(creq))) {
2856 if(h->cciss_read == CCISS_READ_10) {
2857 c->Request.CDB[1] = 0;
2858 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
2859 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
2860 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
2861 c->Request.CDB[5] = start_blk & 0xff;
2862 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
2863 c->Request.CDB[7] = (creq->nr_sectors >> 8) & 0xff;
2864 c->Request.CDB[8] = creq->nr_sectors & 0xff;
2865 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
2866 } else {
582539e5
RD		 2867 u32 upper32 = upper_32_bits(start_blk);
2868
03bbfee5
MMOD		 2869 c->Request.CDBLen = 16;
2870 c->Request.CDB[1]= 0;
582539e5
RD		 2871 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
2872 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
2873 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
2874 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 2875 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
2876 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
2877 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
2878 c->Request.CDB[9]= start_blk & 0xff;
2879 c->Request.CDB[10]= (creq->nr_sectors >> 24) & 0xff;
2880 c->Request.CDB[11]= (creq->nr_sectors >> 16) & 0xff;
2881 c->Request.CDB[12]= (creq->nr_sectors >> 8) & 0xff;
2882 c->Request.CDB[13]= creq->nr_sectors & 0xff;
2883 c->Request.CDB[14] = c->Request.CDB[15] = 0;
2884 }
2885 } else if (blk_pc_request(creq)) {
2886 c->Request.CDBLen = creq->cmd_len;
2887 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 2888 } else {
03bbfee5
MMOD		 2889 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
2890 BUG();
00988a35 2891 }
1da177e4
LT		 2892
2893 spin_lock_irq(q->queue_lock);
2894
7c832835 2895 addQ(&(h->reqQ), c);
1da177e4 2896 h->Qdepth++;
7c832835
BH		 2897 if (h->Qdepth > h->maxQsinceinit)
2898 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 2899
2900 goto queue;
00988a35 2901full:
1da177e4 2902 blk_stop_queue(q);
00988a35 2903startio:
1da177e4
LT		 2904 /* We will already have the driver lock here so not need
2905 * to lock it.
7c832835 2906 */
1da177e4
LT		 2907 start_io(h);
2908}
2909
3da8b713 2910static inline unsigned long get_next_completion(ctlr_info_t *h)
2911{
2912#ifdef CONFIG_CISS_SCSI_TAPE
2913 /* Any rejects from sendcmd() lying around? Process them first */
2914 if (h->scsi_rejects.ncompletions == 0)
2915 return h->access.command_completed(h);
2916 else {
2917 struct sendcmd_reject_list *srl;
2918 int n;
2919 srl = &h->scsi_rejects;
2920 n = --srl->ncompletions;
2921 /* printk("cciss%d: processing saved reject\n", h->ctlr); */
2922 printk("p");
2923 return srl->complete[n];
2924 }
2925#else
2926 return h->access.command_completed(h);
2927#endif
2928}
2929
2930static inline int interrupt_pending(ctlr_info_t *h)
2931{
2932#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 2933 return (h->access.intr_pending(h)
3da8b713 2934 || (h->scsi_rejects.ncompletions > 0));
2935#else
2936 return h->access.intr_pending(h);
2937#endif
2938}
2939
2940static inline long interrupt_not_for_us(ctlr_info_t *h)
2941{
2942#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 2943 return (((h->access.intr_pending(h) == 0) ||
2944 (h->interrupts_enabled == 0))
2945 && (h->scsi_rejects.ncompletions == 0));
3da8b713 2946#else
7c832835 2947 return (((h->access.intr_pending(h) == 0) ||
3da8b713 2948 (h->interrupts_enabled == 0)));
2949#endif
2950}
2951
7d12e780 2952static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 2953{
2954 ctlr_info_t *h = dev_id;
2955 CommandList_struct *c;
2956 unsigned long flags;
33079b21 2957 __u32 a, a1, a2;
1da177e4 2958
3da8b713 2959 if (interrupt_not_for_us(h))
1da177e4 2960 return IRQ_NONE;
1da177e4
LT		 2961 /*
2962 * If there are completed commands in the completion queue,
2963 * we had better do something about it.
2964 */
2965 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 2966 while (interrupt_pending(h)) {
7c832835 2967 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 2968 a1 = a;
33079b21
MM		 2969 if ((a & 0x04)) {
2970 a2 = (a >> 3);
f880632f 2971 if (a2 >= h->nr_cmds) {
7c832835
BH		 2972 printk(KERN_WARNING
2973 "cciss: controller cciss%d failed, stopping.\n",
2974 h->ctlr);
33079b21
MM		 2975 fail_all_cmds(h->ctlr);
2976 return IRQ_HANDLED;
2977 }
2978
2979 c = h->cmd_pool + a2;
2980 a = c->busaddr;
2981
2982 } else {
7c832835 2983 a &= ~3;
33079b21 2984 if ((c = h->cmpQ) == NULL) {
7c832835
BH		 2985 printk(KERN_WARNING
2986 "cciss: Completion of %08x ignored\n",
2987 a1);
2988 continue;
2989 }
2990 while (c->busaddr != a) {
2991 c = c->next;
2992 if (c == h->cmpQ)
2993 break;
2994 }
33079b21 2995 }
1da177e4
LT		 2996 /*
2997 * If we've found the command, take it off the
2998 * completion Q and free it
2999 */
7c832835 3000 if (c->busaddr == a) {
1da177e4
LT		 3001 removeQ(&h->cmpQ, c);
3002 if (c->cmd_type == CMD_RWREQ) {
3003 complete_command(h, c, 0);
3004 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3005 complete(c->waiting);
3006 }
3007# ifdef CONFIG_CISS_SCSI_TAPE
3008 else if (c->cmd_type == CMD_SCSI)
3009 complete_scsi_command(c, 0, a1);
3010# endif
3011 continue;
3012 }
3013 }
3014 }
3015
1da177e4
LT		 3016 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3017 return IRQ_HANDLED;
3018}
7c832835
BH		 3019
3020/*
d14c4ab5 3021 * We cannot read the structure directly, for portability we must use
1da177e4 3022 * the io functions.
7c832835 3023 * This is for debug only.
1da177e4
LT		 3024 */
3025#ifdef CCISS_DEBUG
7c832835 3026static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3027{
3028 int i;
3029 char temp_name[17];
3030
3031 printk("Controller Configuration information\n");
3032 printk("------------------------------------\n");
7c832835 3033 for (i = 0; i < 4; i++)
1da177e4 3034 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3035 temp_name[4] = '\0';
3036 printk(" Signature = %s\n", temp_name);
1da177e4 3037 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3038 printk(" Transport methods supported = 0x%x\n",
3039 readl(&(tb->TransportSupport)));
3040 printk(" Transport methods active = 0x%x\n",
3041 readl(&(tb->TransportActive)));
3042 printk(" Requested transport Method = 0x%x\n",
3043 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3044 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3045 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3046 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3047 readl(&(tb->HostWrite.CoalIntCount)));
3048 printk(" Max outstanding commands = 0x%d\n",
3049 readl(&(tb->CmdsOutMax)));
3050 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3051 for (i = 0; i < 16; i++)
1da177e4
LT		 3052 temp_name[i] = readb(&(tb->ServerName[i]));
3053 temp_name[16] = '\0';
3054 printk(" Server Name = %s\n", temp_name);
7c832835 3055 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3056}
7c832835 3057#endif /* CCISS_DEBUG */
1da177e4 3058
7c832835 3059static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3060{
3061 int i, offset, mem_type, bar_type;
7c832835 3062 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3063 return 0;
3064 offset = 0;
7c832835
BH		 3065 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3066 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3067 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3068 offset += 4;
3069 else {
3070 mem_type = pci_resource_flags(pdev, i) &
7c832835 3071 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3072 switch (mem_type) {
7c832835
BH		 3073 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3074 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3075 offset += 4; /* 32 bit */
3076 break;
3077 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3078 offset += 8;
3079 break;
3080 default: /* reserved in PCI 2.2 */
3081 printk(KERN_WARNING
3082 "Base address is invalid\n");
3083 return -1;
1da177e4
LT		 3084 break;
3085 }
3086 }
7c832835
BH		 3087 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3088 return i + 1;
1da177e4
LT		 3089 }
3090 return -1;
3091}
3092
fb86a35b
MM		 3093/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3094 * controllers that are capable. If not, we use IO-APIC mode.
3095 */
3096
7c832835
BH		 3097static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3098 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3099{
3100#ifdef CONFIG_PCI_MSI
7c832835
BH		 3101 int err;
3102 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3103 {0, 2}, {0, 3}
3104 };
fb86a35b
MM		 3105
3106 /* Some boards advertise MSI but don't really support it */
3107 if ((board_id == 0x40700E11) ||
7c832835
BH		 3108 (board_id == 0x40800E11) ||
3109 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3110 goto default_int_mode;
3111
7c832835
BH		 3112 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3113 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3114 if (!err) {
3115 c->intr[0] = cciss_msix_entries[0].vector;
3116 c->intr[1] = cciss_msix_entries[1].vector;
3117 c->intr[2] = cciss_msix_entries[2].vector;
3118 c->intr[3] = cciss_msix_entries[3].vector;
3119 c->msix_vector = 1;
3120 return;
3121 }
3122 if (err > 0) {
3123 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3124 "available\n", err);
1ecb9c0f 3125 goto default_int_mode;
7c832835
BH		 3126 } else {
3127 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3128 err);
1ecb9c0f 3129 goto default_int_mode;
7c832835
BH		 3130 }
3131 }
3132 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3133 if (!pci_enable_msi(pdev)) {
7c832835 3134 c->msi_vector = 1;
7c832835
BH		 3135 } else {
3136 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3137 }
3138 }
1ecb9c0f 3139default_int_mode:
7c832835 3140#endif /* CONFIG_PCI_MSI */
fb86a35b 3141 /* if we get here we're going to use the default interrupt mode */
7c832835 3142 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3143 return;
3144}
3145
7d1fd970 3146static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3147{
3148 ushort subsystem_vendor_id, subsystem_device_id, command;
3149 __u32 board_id, scratchpad = 0;
3150 __u64 cfg_offset;
3151 __u32 cfg_base_addr;
3152 __u64 cfg_base_addr_index;
c33ac89b 3153 int i, err;
1da177e4
LT		 3154
3155 /* check to see if controller has been disabled */
3156 /* BEFORE trying to enable it */
7c832835
BH		 3157 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3158 if (!(command & 0x02)) {
3159 printk(KERN_WARNING
3160 "cciss: controller appears to be disabled\n");
c33ac89b 3161 return -ENODEV;
1da177e4
LT		 3162 }
3163
c33ac89b 3164 err = pci_enable_device(pdev);
7c832835 3165 if (err) {
1da177e4 3166 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3167 return err;
1da177e4 3168 }
1da177e4 3169
4e570309
BH		 3170 err = pci_request_regions(pdev, "cciss");
3171 if (err) {
3172 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3173 "aborting\n");
872225ca 3174 return err;
4e570309
BH		 3175 }
3176
1da177e4
LT		 3177 subsystem_vendor_id = pdev->subsystem_vendor;
3178 subsystem_device_id = pdev->subsystem_device;
3179 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3180 subsystem_vendor_id);
1da177e4 3181
1da177e4
LT		 3182#ifdef CCISS_DEBUG
3183 printk("command = %x\n", command);
3184 printk("irq = %x\n", pdev->irq);
3185 printk("board_id = %x\n", board_id);
7c832835 3186#endif /* CCISS_DEBUG */
1da177e4 3187
fb86a35b
MM		 3188/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3189 * else we use the IO-APIC interrupt assigned to us by system ROM.
3190 */
3191 cciss_interrupt_mode(c, pdev, board_id);
1da177e4
LT		 3192
3193 /*
3194 * Memory base addr is first addr , the second points to the config
7c832835 3195 * table
1da177e4
LT		 3196 */
3197
7c832835 3198 c->paddr = pci_resource_start(pdev, 0); /* addressing mode bits already removed */
1da177e4 3199#ifdef CCISS_DEBUG
9f92f471 3200 printk("address 0 = %lx\n", c->paddr);
7c832835 3201#endif /* CCISS_DEBUG */
a5b92873 3202 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3203
3204 /* Wait for the board to become ready. (PCI hotplug needs this.)
3205 * We poll for up to 120 secs, once per 100ms. */
7c832835 3206 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3207 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3208 if (scratchpad == CCISS_FIRMWARE_READY)
3209 break;
3210 set_current_state(TASK_INTERRUPTIBLE);
7c832835 3211 schedule_timeout(HZ / 10); /* wait 100ms */
1da177e4
LT		 3212 }
3213 if (scratchpad != CCISS_FIRMWARE_READY) {
3214 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3215 err = -ENODEV;
4e570309 3216 goto err_out_free_res;
1da177e4
LT		 3217 }
3218
3219 /* get the address index number */
3220 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3221 cfg_base_addr &= (__u32) 0x0000ffff;
3222#ifdef CCISS_DEBUG
3223 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3224#endif /* CCISS_DEBUG */
3225 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3226#ifdef CCISS_DEBUG
9f92f471
RD		 3227 printk("cfg base address index = %llx\n",
3228 (unsigned long long)cfg_base_addr_index);
7c832835 3229#endif /* CCISS_DEBUG */
1da177e4
LT		 3230 if (cfg_base_addr_index == -1) {
3231 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3232 err = -ENODEV;
4e570309 3233 goto err_out_free_res;
1da177e4
LT		 3234 }
3235
3236 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3237#ifdef CCISS_DEBUG
9f92f471 3238 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3239#endif /* CCISS_DEBUG */
3240 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3241 cfg_base_addr_index) +
3242 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3243 c->board_id = board_id;
3244
3245#ifdef CCISS_DEBUG
945f390f 3246 print_cfg_table(c->cfgtable);
7c832835 3247#endif /* CCISS_DEBUG */
1da177e4 3248
49153998
MM		 3249 /* Some controllers support Zero Memory Raid (ZMR).
3250 * When configured in ZMR mode the number of supported
3251 * commands drops to 64. So instead of just setting an
3252 * arbitrary value we make the driver a little smarter.
3253 * We read the config table to tell us how many commands
3254 * are supported on the controller then subtract 4 to
3255 * leave a little room for ioctl calls.
3256 */
3257 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3258 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3259 if (board_id == products[i].board_id) {
3260 c->product_name = products[i].product_name;
3261 c->access = *(products[i].access);
49153998 3262 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3263 break;
3264 }
3265 }
7c832835
BH		 3266 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3267 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3268 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3269 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3270 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3271 err = -ENODEV;
4e570309 3272 goto err_out_free_res;
1da177e4 3273 }
4ff9a9a4
MM		 3274 /* We didn't find the controller in our list. We know the
3275 * signature is valid. If it's an HP device let's try to
3276 * bind to the device and fire it up. Otherwise we bail.
3277 */
3278 if (i == ARRAY_SIZE(products)) {
3279 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3280 c->product_name = products[i-1].product_name;
3281 c->access = *(products[i-1].access);
49153998 3282 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3283 printk(KERN_WARNING "cciss: This is an unknown "
3284 "Smart Array controller.\n"
3285 "cciss: Please update to the latest driver "
3286 "available from www.hp.com.\n");
3287 } else {
3288 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3289 " to access the Smart Array controller %08lx\n"
3290 , (unsigned long)board_id);
3291 err = -ENODEV;
3292 goto err_out_free_res;
3293 }
3294 }
1da177e4 3295#ifdef CONFIG_X86
7c832835
BH		 3296 {
3297 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3298 __u32 prefetch;
3299 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3300 prefetch |= 0x100;
3301 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3302 }
1da177e4
LT		 3303#endif
3304
8bf50f71
MMOD		 3305 /* Disabling DMA prefetch and refetch for the P600.
3306 * An ASIC bug may result in accesses to invalid memory addresses.
3307 * We've disabled prefetch for some time now. Testing with XEN
3308 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3309 */
3310 if(board_id == 0x3225103C) {
3311 __u32 dma_prefetch;
8bf50f71 3312 __u32 dma_refetch;
f92e2f5f
MM		 3313 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3314 dma_prefetch |= 0x8000;
3315 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3316 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3317 dma_refetch |= 0x1;
3318 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3319 }
3320
1da177e4
LT		 3321#ifdef CCISS_DEBUG
3322 printk("Trying to put board into Simple mode\n");
7c832835 3323#endif /* CCISS_DEBUG */
1da177e4 3324 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3325 /* Update the field, and then ring the doorbell */
3326 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3327 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3328
3329 /* under certain very rare conditions, this can take awhile.
3330 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3331 * as we enter this code.) */
7c832835 3332 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3333 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3334 break;
3335 /* delay and try again */
3336 set_current_state(TASK_INTERRUPTIBLE);
3337 schedule_timeout(10);
7c832835 3338 }
1da177e4
LT		 3339
3340#ifdef CCISS_DEBUG
7c832835
BH		 3341 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3342 readl(c->vaddr + SA5_DOORBELL));
3343#endif /* CCISS_DEBUG */
1da177e4 3344#ifdef CCISS_DEBUG
7c832835
BH		 3345 print_cfg_table(c->cfgtable);
3346#endif /* CCISS_DEBUG */
1da177e4 3347
7c832835 3348 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3349 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3350 " simple mode\n");
c33ac89b 3351 err = -ENODEV;
4e570309 3352 goto err_out_free_res;
1da177e4
LT		 3353 }
3354 return 0;
3355
5faad620 3356err_out_free_res:
872225ca
MM		 3357 /*
3358 * Deliberately omit pci_disable_device(): it does something nasty to
3359 * Smart Array controllers that pci_enable_device does not undo
3360 */
4e570309 3361 pci_release_regions(pdev);
c33ac89b 3362 return err;
1da177e4
LT		 3363}
3364
6ae5ce8e
MM		 3365/* Function to find the first free pointer into our hba[] array
3366 * Returns -1 if no free entries are left.
7c832835 3367 */
1da177e4
LT		 3368static int alloc_cciss_hba(void)
3369{
799202cb 3370 int i;
1da177e4 3371
7c832835 3372 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3373 if (!hba[i]) {
3374 ctlr_info_t *p;
f2912a12 3375
06ff37ff 3376 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3377 if (!p)
3378 goto Enomem;
1da177e4
LT		 3379 hba[i] = p;
3380 return i;
3381 }
3382 }
3383 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3384 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3385 return -1;
3386Enomem:
1da177e4 3387 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3388 return -1;
3389}
3390
3391static void free_hba(int i)
3392{
3393 ctlr_info_t *p = hba[i];
3394 int n;
3395
3396 hba[i] = NULL;
799202cb 3397 for (n = 0; n < CISS_MAX_LUN; n++)
1da177e4
LT		 3398 put_disk(p->gendisk[n]);
3399 kfree(p);
3400}
3401
3402/*
3403 * This is it. Find all the controllers and register them. I really hate
3404 * stealing all these major device numbers.
3405 * returns the number of block devices registered.
3406 */
3407static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 3408 const struct pci_device_id *ent)
1da177e4 3409{
1da177e4 3410 int i;
799202cb 3411 int j = 0;
1da177e4 3412 int rc;
22bece00
MM		 3413 int dac, return_code;
3414 InquiryData_struct *inq_buff = NULL;
1da177e4 3415
1da177e4 3416 i = alloc_cciss_hba();
7c832835 3417 if (i < 0)
e2019b58 3418 return -1;
1f8ef380
MM		 3419
3420 hba[i]->busy_initializing = 1;
3421
1da177e4
LT		 3422 if (cciss_pci_init(hba[i], pdev) != 0)
3423 goto clean1;
3424
3425 sprintf(hba[i]->devname, "cciss%d", i);
3426 hba[i]->ctlr = i;
3427 hba[i]->pdev = pdev;
3428
3429 /* configure PCI DMA stuff */
eb0df996 3430 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK))
40aabb58 3431 dac = 1;
eb0df996 3432 else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK))
40aabb58 3433 dac = 0;
1da177e4 3434 else {
40aabb58 3435 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 3436 goto clean1;
3437 }
3438
3439 /*
3440 * register with the major number, or get a dynamic major number
3441 * by passing 0 as argument. This is done for greater than
3442 * 8 controller support.
3443 */
3444 if (i < MAX_CTLR_ORIG)
564de74a 3445 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 3446 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 3447 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 3448 printk(KERN_ERR
7c832835
BH		 3449 "cciss: Unable to get major number %d for %s "
3450 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 3451 goto clean1;
7c832835 3452 } else {
1da177e4
LT		 3453 if (i >= MAX_CTLR_ORIG)
3454 hba[i]->major = rc;
3455 }
3456
3457 /* make sure the board interrupts are off */
3458 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 3459 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 3460 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 3461 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 3462 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 3463 goto clean2;
3464 }
40aabb58
BH		 3465
3466 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 3467 hba[i]->devname, pdev->device, pci_name(pdev),
3468 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
3469
3470 hba[i]->cmd_pool_bits =
061837bc
JL		 3471 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
3472 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 3473 hba[i]->cmd_pool = (CommandList_struct *)
3474 pci_alloc_consistent(hba[i]->pdev,
f880632f 3475 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 3476 &(hba[i]->cmd_pool_dhandle));
3477 hba[i]->errinfo_pool = (ErrorInfo_struct *)
3478 pci_alloc_consistent(hba[i]->pdev,
f880632f 3479 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 3480 &(hba[i]->errinfo_pool_dhandle));
3481 if ((hba[i]->cmd_pool_bits == NULL)
3482 || (hba[i]->cmd_pool == NULL)
3483 || (hba[i]->errinfo_pool == NULL)) {
3484 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 3485 goto clean4;
3486 }
3da8b713 3487#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 3488 hba[i]->scsi_rejects.complete =
3489 kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
f880632f 3490 (hba[i]->nr_cmds + 5), GFP_KERNEL);
3da8b713 3491 if (hba[i]->scsi_rejects.complete == NULL) {
7c832835 3492 printk(KERN_ERR "cciss: out of memory");
3da8b713 3493 goto clean4;
3494 }
3495#endif
1da177e4 3496 spin_lock_init(&hba[i]->lock);
1da177e4 3497
7c832835
BH		 3498 /* Initialize the pdev driver private data.
3499 have it point to hba[i]. */
1da177e4 3500 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 3501 /* command and error info recs zeroed out before
3502 they are used */
3503 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 3504 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
3505 * sizeof(unsigned long));
1da177e4 3506
6ae5ce8e
MM		 3507 hba[i]->num_luns = 0;
3508 hba[i]->highest_lun = -1;
3509 for (j = 0; j < CISS_MAX_LUN; j++) {
3510 hba[i]->drv[j].raid_level = -1;
3511 hba[i]->drv[j].queue = NULL;
3512 hba[i]->gendisk[j] = NULL;
3513 }
1da177e4
LT		 3514
3515 cciss_scsi_setup(i);
3516
3517 /* Turn the interrupts on so we can service requests */
3518 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
3519
22bece00
MM		 3520 /* Get the firmware version */
3521 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
3522 if (inq_buff == NULL) {
3523 printk(KERN_ERR "cciss: out of memory\n");
3524 goto clean4;
3525 }
3526
3527 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
3528 sizeof(InquiryData_struct), 0, 0 , 0, TYPE_CMD);
3529 if (return_code == IO_OK) {
3530 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
3531 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
3532 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
3533 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
3534 } else { /* send command failed */
3535 printk(KERN_WARNING "cciss: unable to determine firmware"
3536 " version of controller\n");
3537 }
3538
1da177e4 3539 cciss_procinit(i);
92c4231a
MM		 3540
3541 hba[i]->cciss_max_sectors = 2048;
3542
d6dbf42e 3543 hba[i]->busy_initializing = 0;
1da177e4 3544
6ae5ce8e 3545 rebuild_lun_table(hba[i], 1);
e2019b58 3546 return 1;
1da177e4 3547
6ae5ce8e 3548clean4:
22bece00 3549 kfree(inq_buff);
3da8b713 3550#ifdef CONFIG_CISS_SCSI_TAPE
1acc0b0b 3551 kfree(hba[i]->scsi_rejects.complete);
3da8b713 3552#endif
6044ec88 3553 kfree(hba[i]->cmd_pool_bits);
7c832835 3554 if (hba[i]->cmd_pool)
1da177e4 3555 pci_free_consistent(hba[i]->pdev,
f880632f 3556 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 3557 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3558 if (hba[i]->errinfo_pool)
1da177e4 3559 pci_free_consistent(hba[i]->pdev,
f880632f 3560 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 3561 hba[i]->errinfo_pool,
3562 hba[i]->errinfo_pool_dhandle);
fb86a35b 3563 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 3564clean2:
1da177e4 3565 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 3566clean1:
1f8ef380 3567 hba[i]->busy_initializing = 0;
799202cb
MM		 3568 /* cleanup any queues that may have been initialized */
3569 for (j=0; j <= hba[i]->highest_lun; j++){
3570 drive_info_struct *drv = &(hba[i]->drv[j]);
3571 if (drv->queue)
3572 blk_cleanup_queue(drv->queue);
3573 }
872225ca
MM		 3574 /*
3575 * Deliberately omit pci_disable_device(): it does something nasty to
3576 * Smart Array controllers that pci_enable_device does not undo
3577 */
799202cb 3578 pci_release_regions(pdev);
799202cb 3579 pci_set_drvdata(pdev, NULL);
61808c2b 3580 free_hba(i);
e2019b58 3581 return -1;
1da177e4
LT		 3582}
3583
e9ca75b5 3584static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 3585{
3586 ctlr_info_t *tmp_ptr;
e9ca75b5 3587 int i;
1da177e4 3588 char flush_buf[4];
7c832835 3589 int return_code;
1da177e4 3590
e9ca75b5
GB		 3591 tmp_ptr = pci_get_drvdata(pdev);
3592 if (tmp_ptr == NULL)
3593 return;
3594 i = tmp_ptr->ctlr;
3595 if (hba[i] == NULL)
3596 return;
3597
3598 /* Turn board interrupts off and send the flush cache command */
3599 /* sendcmd will turn off interrupt, and send the flush...
3600 * To write all data in the battery backed cache to disks */
3601 memset(flush_buf, 0, 4);
3602 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
3603 TYPE_CMD);
3604 if (return_code == IO_OK) {
3605 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
3606 } else {
3607 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
3608 }
3609 free_irq(hba[i]->intr[2], hba[i]);
3610}
3611
3612static void __devexit cciss_remove_one(struct pci_dev *pdev)
3613{
3614 ctlr_info_t *tmp_ptr;
3615 int i, j;
3616
7c832835
BH		 3617 if (pci_get_drvdata(pdev) == NULL) {
3618 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 3619 return;
3620 }
3621 tmp_ptr = pci_get_drvdata(pdev);
3622 i = tmp_ptr->ctlr;
7c832835 3623 if (hba[i] == NULL) {
1da177e4 3624 printk(KERN_ERR "cciss: device appears to "
7c832835 3625 "already be removed \n");
1da177e4
LT		 3626 return;
3627 }
b6550777
BH		 3628
3629 remove_proc_entry(hba[i]->devname, proc_cciss);
3630 unregister_blkdev(hba[i]->major, hba[i]->devname);
3631
3632 /* remove it from the disk list */
3633 for (j = 0; j < CISS_MAX_LUN; j++) {
3634 struct gendisk *disk = hba[i]->gendisk[j];
3635 if (disk) {
165125e1 3636 struct request_queue *q = disk->queue;
b6550777
BH		 3637
3638 if (disk->flags & GENHD_FL_UP)
3639 del_gendisk(disk);
3640 if (q)
3641 blk_cleanup_queue(q);
3642 }
3643 }
3644
ba198efb 3645#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 3646 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 3647#endif
b6550777 3648
e9ca75b5 3649 cciss_shutdown(pdev);
fb86a35b
MM		 3650
3651#ifdef CONFIG_PCI_MSI
7c832835
BH		 3652 if (hba[i]->msix_vector)
3653 pci_disable_msix(hba[i]->pdev);
3654 else if (hba[i]->msi_vector)
3655 pci_disable_msi(hba[i]->pdev);
3656#endif /* CONFIG_PCI_MSI */
fb86a35b 3657
1da177e4 3658 iounmap(hba[i]->vaddr);
1da177e4 3659
f880632f 3660 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 3661 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 3662 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 3663 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 3664 kfree(hba[i]->cmd_pool_bits);
3da8b713 3665#ifdef CONFIG_CISS_SCSI_TAPE
3666 kfree(hba[i]->scsi_rejects.complete);
3667#endif
872225ca
MM		 3668 /*
3669 * Deliberately omit pci_disable_device(): it does something nasty to
3670 * Smart Array controllers that pci_enable_device does not undo
3671 */
7c832835 3672 pci_release_regions(pdev);
4e570309 3673 pci_set_drvdata(pdev, NULL);
1da177e4 3674 free_hba(i);
7c832835 3675}
1da177e4
LT		 3676
3677static struct pci_driver cciss_pci_driver = {
7c832835
BH		 3678 .name = "cciss",
3679 .probe = cciss_init_one,
3680 .remove = __devexit_p(cciss_remove_one),
3681 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 3682 .shutdown = cciss_shutdown,
1da177e4
LT		 3683};
3684
3685/*
3686 * This is it. Register the PCI driver information for the cards we control
7c832835 3687 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 3688 */
3689static int __init cciss_init(void)
3690{
3691 printk(KERN_INFO DRIVER_NAME "\n");
3692
3693 /* Register for our PCI devices */
9bfab8ce 3694 return pci_register_driver(&cciss_pci_driver);
1da177e4
LT		 3695}
3696
3697static void __exit cciss_cleanup(void)
3698{
3699 int i;
3700
3701 pci_unregister_driver(&cciss_pci_driver);
3702 /* double check that all controller entrys have been removed */
7c832835
BH		 3703 for (i = 0; i < MAX_CTLR; i++) {
3704 if (hba[i] != NULL) {
1da177e4 3705 printk(KERN_WARNING "cciss: had to remove"
7c832835 3706 " controller %d\n", i);
1da177e4
LT		 3707 cciss_remove_one(hba[i]->pdev);
3708 }
3709 }
928b4d8c 3710 remove_proc_entry("driver/cciss", NULL);
1da177e4
LT		 3711}
3712
33079b21
MM		 3713static void fail_all_cmds(unsigned long ctlr)
3714{
3715 /* If we get here, the board is apparently dead. */
3716 ctlr_info_t *h = hba[ctlr];
3717 CommandList_struct *c;
3718 unsigned long flags;
3719
3720 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 3721 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 3722
3723 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
3724
7c832835 3725 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 3726
3727 /* move everything off the request queue onto the completed queue */
7c832835 3728 while ((c = h->reqQ) != NULL) {
33079b21
MM		 3729 removeQ(&(h->reqQ), c);
3730 h->Qdepth--;
7c832835 3731 addQ(&(h->cmpQ), c);
33079b21
MM		 3732 }
3733
3734 /* Now, fail everything on the completed queue with a HW error */
7c832835 3735 while ((c = h->cmpQ) != NULL) {
33079b21
MM		 3736 removeQ(&h->cmpQ, c);
3737 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
3738 if (c->cmd_type == CMD_RWREQ) {
3739 complete_command(h, c, 0);
3740 } else if (c->cmd_type == CMD_IOCTL_PEND)
3741 complete(c->waiting);
3742#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 3743 else if (c->cmd_type == CMD_SCSI)
3744 complete_scsi_command(c, 0, 0);
33079b21
MM		 3745#endif
3746 }
3747 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
3748 return;
3749}
3750
1da177e4
LT		 3751module_init(cciss_init);
3752module_exit(cciss_cleanup);
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