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cciss: factor out core of sendcmd_withirq() for use by SCSI error handling code
[deliverable/linux.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
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>
0a9279cc 54#include <linux/kthread.h>
1da177e4
LT		 55
56#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 57#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
58#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 59
60/* Embedded module documentation macros - see modules.h */
61MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 62MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 63MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 64 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
65 " Smart Array G2 Series SAS/SATA Controllers");
66MODULE_VERSION("3.6.20");
1da177e4
LT		 67MODULE_LICENSE("GPL");
68
69#include "cciss_cmd.h"
70#include "cciss.h"
71#include <linux/cciss_ioctl.h>
72
73/* define the PCI info for the cards we can control */
74static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 75 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
76 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
84 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
85 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 102 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
103 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 104 {0,}
105};
7c832835 106
1da177e4
LT		 107MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
108
1da177e4
LT		 109/* board_id = Subsystem Device ID & Vendor ID
110 * product = Marketing Name for the board
7c832835 111 * access = Address of the struct of function pointers
1da177e4
LT		 112 */
113static struct board_type products[] = {
49153998
MM		 114 {0x40700E11, "Smart Array 5300", &SA5_access},
115 {0x40800E11, "Smart Array 5i", &SA5B_access},
116 {0x40820E11, "Smart Array 532", &SA5B_access},
117 {0x40830E11, "Smart Array 5312", &SA5B_access},
118 {0x409A0E11, "Smart Array 641", &SA5_access},
119 {0x409B0E11, "Smart Array 642", &SA5_access},
120 {0x409C0E11, "Smart Array 6400", &SA5_access},
121 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
122 {0x40910E11, "Smart Array 6i", &SA5_access},
123 {0x3225103C, "Smart Array P600", &SA5_access},
124 {0x3223103C, "Smart Array P800", &SA5_access},
125 {0x3234103C, "Smart Array P400", &SA5_access},
126 {0x3235103C, "Smart Array P400i", &SA5_access},
127 {0x3211103C, "Smart Array E200i", &SA5_access},
128 {0x3212103C, "Smart Array E200", &SA5_access},
129 {0x3213103C, "Smart Array E200i", &SA5_access},
130 {0x3214103C, "Smart Array E200i", &SA5_access},
131 {0x3215103C, "Smart Array E200i", &SA5_access},
132 {0x3237103C, "Smart Array E500", &SA5_access},
133 {0x323D103C, "Smart Array P700m", &SA5_access},
134 {0x3241103C, "Smart Array P212", &SA5_access},
135 {0x3243103C, "Smart Array P410", &SA5_access},
136 {0x3245103C, "Smart Array P410i", &SA5_access},
137 {0x3247103C, "Smart Array P411", &SA5_access},
138 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 139 {0x324A103C, "Smart Array P712m", &SA5_access},
140 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 141 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 142};
143
d14c4ab5 144/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 145#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 146#define MAX_IOCTL_CONFIG_WAIT 1000
147
148/*define how many times we will try a command because of bus resets */
149#define MAX_CMD_RETRIES 3
150
1da177e4
LT		 151#define MAX_CTLR 32
152
153/* Originally cciss driver only supports 8 major numbers */
154#define MAX_CTLR_ORIG 8
155
1da177e4
LT		 156static ctlr_info_t *hba[MAX_CTLR];
157
165125e1 158static void do_cciss_request(struct request_queue *q);
7d12e780 159static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 160static int cciss_open(struct block_device *bdev, fmode_t mode);
161static int cciss_release(struct gendisk *disk, fmode_t mode);
162static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 163 unsigned int cmd, unsigned long arg);
a885c8c4 164static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 165
1da177e4 166static int cciss_revalidate(struct gendisk *disk);
6ae5ce8e 167static int rebuild_lun_table(ctlr_info_t *h, int first_time);
a0ea8622 168static int deregister_disk(ctlr_info_t *h, int drv_index,
7c832835 169 int clear_all);
1da177e4 170
00988a35
MMOD		 171static void cciss_read_capacity(int ctlr, int logvol, int withirq,
172 sector_t *total_size, unsigned int *block_size);
173static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
174 sector_t *total_size, unsigned int *block_size);
175static void cciss_geometry_inquiry(int ctlr, int logvol,
176 int withirq, sector_t total_size,
177 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 178 drive_info_struct *drv);
7c832835
BH		 179static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
180 __u32);
181static void start_io(ctlr_info_t *h);
182static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
183 unsigned int use_unit_num, unsigned int log_unit,
184 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
185static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
186 unsigned int use_unit_num, unsigned int log_unit,
187 __u8 page_code, int cmd_type);
1da177e4 188
33079b21 189static void fail_all_cmds(unsigned long ctlr);
0a9279cc
MM		 190static int scan_thread(void *data);
191static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
33079b21 192
1da177e4 193#ifdef CONFIG_PROC_FS
1da177e4
LT		 194static void cciss_procinit(int i);
195#else
7c832835
BH		 196static void cciss_procinit(int i)
197{
198}
199#endif /* CONFIG_PROC_FS */
1da177e4
LT		 200
201#ifdef CONFIG_COMPAT
ef7822c2
AV		 202static int cciss_compat_ioctl(struct block_device *, fmode_t,
203 unsigned, unsigned long);
1da177e4
LT		 204#endif
205
7c832835
BH		 206static struct block_device_operations cciss_fops = {
207 .owner = THIS_MODULE,
ef7822c2
AV		 208 .open = cciss_open,
209 .release = cciss_release,
210 .locked_ioctl = cciss_ioctl,
7c832835 211 .getgeo = cciss_getgeo,
1da177e4 212#ifdef CONFIG_COMPAT
ef7822c2 213 .compat_ioctl = cciss_compat_ioctl,
1da177e4 214#endif
7c832835 215 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 216};
217
218/*
219 * Enqueuing and dequeuing functions for cmdlists.
220 */
8a3173de 221static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 222{
8a3173de 223 hlist_add_head(&c->list, list);
1da177e4
LT		 224}
225
8a3173de 226static inline void removeQ(CommandList_struct *c)
1da177e4 227{
8a3173de
JA		 228 if (WARN_ON(hlist_unhashed(&c->list)))
229 return;
230
231 hlist_del_init(&c->list);
1da177e4
LT		 232}
233
234#include "cciss_scsi.c" /* For SCSI tape support */
235
0f5486ec
RD		 236#define RAID_UNKNOWN 6
237
1da177e4
LT		 238#ifdef CONFIG_PROC_FS
239
240/*
241 * Report information about this controller.
242 */
243#define ENG_GIG 1000000000
244#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 245#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 246static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
247 "UNKNOWN"
248};
1da177e4
LT		 249
250static struct proc_dir_entry *proc_cciss;
251
89b6e743 252static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 253{
89b6e743
MM		 254 ctlr_info_t *h = seq->private;
255
256 seq_printf(seq, "%s: HP %s Controller\n"
257 "Board ID: 0x%08lx\n"
258 "Firmware Version: %c%c%c%c\n"
259 "IRQ: %d\n"
260 "Logical drives: %d\n"
261 "Current Q depth: %d\n"
262 "Current # commands on controller: %d\n"
263 "Max Q depth since init: %d\n"
264 "Max # commands on controller since init: %d\n"
265 "Max SG entries since init: %d\n",
266 h->devname,
267 h->product_name,
268 (unsigned long)h->board_id,
269 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
270 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
271 h->num_luns,
272 h->Qdepth, h->commands_outstanding,
273 h->maxQsinceinit, h->max_outstanding, h->maxSG);
274
275#ifdef CONFIG_CISS_SCSI_TAPE
276 cciss_seq_tape_report(seq, h->ctlr);
277#endif /* CONFIG_CISS_SCSI_TAPE */
278}
1da177e4 279
89b6e743
MM		 280static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
281{
282 ctlr_info_t *h = seq->private;
283 unsigned ctlr = h->ctlr;
284 unsigned long flags;
1da177e4
LT		 285
286 /* prevent displaying bogus info during configuration
287 * or deconfiguration of a logical volume
288 */
289 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
290 if (h->busy_configuring) {
291 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 292 return ERR_PTR(-EBUSY);
1da177e4
LT		 293 }
294 h->busy_configuring = 1;
295 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
296
89b6e743
MM		 297 if (*pos == 0)
298 cciss_seq_show_header(seq);
299
300 return pos;
301}
302
303static int cciss_seq_show(struct seq_file *seq, void *v)
304{
305 sector_t vol_sz, vol_sz_frac;
306 ctlr_info_t *h = seq->private;
307 unsigned ctlr = h->ctlr;
308 loff_t *pos = v;
309 drive_info_struct *drv = &h->drv[*pos];
310
311 if (*pos > h->highest_lun)
312 return 0;
313
314 if (drv->heads == 0)
315 return 0;
316
317 vol_sz = drv->nr_blocks;
318 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
319 vol_sz_frac *= 100;
320 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
321
322 if (drv->raid_level > 5)
323 drv->raid_level = RAID_UNKNOWN;
324 seq_printf(seq, "cciss/c%dd%d:"
325 "\t%4u.%02uGB\tRAID %s\n",
326 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
327 raid_label[drv->raid_level]);
328 return 0;
329}
330
331static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
332{
333 ctlr_info_t *h = seq->private;
334
335 if (*pos > h->highest_lun)
336 return NULL;
337 *pos += 1;
338
339 return pos;
340}
341
342static void cciss_seq_stop(struct seq_file *seq, void *v)
343{
344 ctlr_info_t *h = seq->private;
345
346 /* Only reset h->busy_configuring if we succeeded in setting
347 * it during cciss_seq_start. */
348 if (v == ERR_PTR(-EBUSY))
349 return;
7c832835 350
1da177e4 351 h->busy_configuring = 0;
1da177e4
LT		 352}
353
89b6e743
MM		 354static struct seq_operations cciss_seq_ops = {
355 .start = cciss_seq_start,
356 .show = cciss_seq_show,
357 .next = cciss_seq_next,
358 .stop = cciss_seq_stop,
359};
360
361static int cciss_seq_open(struct inode *inode, struct file *file)
362{
363 int ret = seq_open(file, &cciss_seq_ops);
364 struct seq_file *seq = file->private_data;
365
366 if (!ret)
367 seq->private = PDE(inode)->data;
368
369 return ret;
370}
371
372static ssize_t
373cciss_proc_write(struct file *file, const char __user *buf,
374 size_t length, loff_t *ppos)
1da177e4 375{
89b6e743
MM		 376 int err;
377 char *buffer;
378
379#ifndef CONFIG_CISS_SCSI_TAPE
380 return -EINVAL;
1da177e4
LT		 381#endif
382
89b6e743 383 if (!buf || length > PAGE_SIZE - 1)
7c832835 384 return -EINVAL;
89b6e743
MM		 385
386 buffer = (char *)__get_free_page(GFP_KERNEL);
387 if (!buffer)
388 return -ENOMEM;
389
390 err = -EFAULT;
391 if (copy_from_user(buffer, buf, length))
392 goto out;
393 buffer[length] = '\0';
394
395#ifdef CONFIG_CISS_SCSI_TAPE
396 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
397 struct seq_file *seq = file->private_data;
398 ctlr_info_t *h = seq->private;
399 int rc;
400
7c832835
BH		 401 rc = cciss_engage_scsi(h->ctlr);
402 if (rc != 0)
89b6e743
MM		 403 err = -rc;
404 else
405 err = length;
406 } else
407#endif /* CONFIG_CISS_SCSI_TAPE */
408 err = -EINVAL;
7c832835
BH		 409 /* might be nice to have "disengage" too, but it's not
410 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 411
412out:
413 free_page((unsigned long)buffer);
414 return err;
1da177e4
LT		 415}
416
89b6e743
MM		 417static struct file_operations cciss_proc_fops = {
418 .owner = THIS_MODULE,
419 .open = cciss_seq_open,
420 .read = seq_read,
421 .llseek = seq_lseek,
422 .release = seq_release,
423 .write = cciss_proc_write,
424};
425
1da177e4
LT		 426static void __devinit cciss_procinit(int i)
427{
428 struct proc_dir_entry *pde;
429
89b6e743 430 if (proc_cciss == NULL)
928b4d8c 431 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 432 if (!proc_cciss)
433 return;
3dfcf9c4 434 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 435 S_IROTH, proc_cciss,
3dfcf9c4 436 &cciss_proc_fops, hba[i]);
1da177e4 437}
7c832835 438#endif /* CONFIG_PROC_FS */
1da177e4 439
7fe06326
AP		 440#define MAX_PRODUCT_NAME_LEN 19
441
442#define to_hba(n) container_of(n, struct ctlr_info, dev)
443#define to_drv(n) container_of(n, drive_info_struct, dev)
444
445static struct device_type cciss_host_type = {
446 .name = "cciss_host",
447};
448
449static ssize_t dev_show_unique_id(struct device *dev,
450 struct device_attribute *attr,
451 char *buf)
452{
453 drive_info_struct *drv = to_drv(dev);
454 struct ctlr_info *h = to_hba(drv->dev.parent);
455 __u8 sn[16];
456 unsigned long flags;
457 int ret = 0;
458
459 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
460 if (h->busy_configuring)
461 ret = -EBUSY;
462 else
463 memcpy(sn, drv->serial_no, sizeof(sn));
464 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
465
466 if (ret)
467 return ret;
468 else
469 return snprintf(buf, 16 * 2 + 2,
470 "%02X%02X%02X%02X%02X%02X%02X%02X"
471 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
472 sn[0], sn[1], sn[2], sn[3],
473 sn[4], sn[5], sn[6], sn[7],
474 sn[8], sn[9], sn[10], sn[11],
475 sn[12], sn[13], sn[14], sn[15]);
476}
477DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
478
479static ssize_t dev_show_vendor(struct device *dev,
480 struct device_attribute *attr,
481 char *buf)
482{
483 drive_info_struct *drv = to_drv(dev);
484 struct ctlr_info *h = to_hba(drv->dev.parent);
485 char vendor[VENDOR_LEN + 1];
486 unsigned long flags;
487 int ret = 0;
488
489 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
490 if (h->busy_configuring)
491 ret = -EBUSY;
492 else
493 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
494 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
495
496 if (ret)
497 return ret;
498 else
499 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
500}
501DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
502
503static ssize_t dev_show_model(struct device *dev,
504 struct device_attribute *attr,
505 char *buf)
506{
507 drive_info_struct *drv = to_drv(dev);
508 struct ctlr_info *h = to_hba(drv->dev.parent);
509 char model[MODEL_LEN + 1];
510 unsigned long flags;
511 int ret = 0;
512
513 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
514 if (h->busy_configuring)
515 ret = -EBUSY;
516 else
517 memcpy(model, drv->model, MODEL_LEN + 1);
518 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
519
520 if (ret)
521 return ret;
522 else
523 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
524}
525DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
526
527static ssize_t dev_show_rev(struct device *dev,
528 struct device_attribute *attr,
529 char *buf)
530{
531 drive_info_struct *drv = to_drv(dev);
532 struct ctlr_info *h = to_hba(drv->dev.parent);
533 char rev[REV_LEN + 1];
534 unsigned long flags;
535 int ret = 0;
536
537 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
538 if (h->busy_configuring)
539 ret = -EBUSY;
540 else
541 memcpy(rev, drv->rev, REV_LEN + 1);
542 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
543
544 if (ret)
545 return ret;
546 else
547 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
548}
549DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
550
551static struct attribute *cciss_dev_attrs[] = {
552 &dev_attr_unique_id.attr,
553 &dev_attr_model.attr,
554 &dev_attr_vendor.attr,
555 &dev_attr_rev.attr,
556 NULL
557};
558
559static struct attribute_group cciss_dev_attr_group = {
560 .attrs = cciss_dev_attrs,
561};
562
563static struct attribute_group *cciss_dev_attr_groups[] = {
564 &cciss_dev_attr_group,
565 NULL
566};
567
568static struct device_type cciss_dev_type = {
569 .name = "cciss_device",
570 .groups = cciss_dev_attr_groups,
571};
572
573static struct bus_type cciss_bus_type = {
574 .name = "cciss",
575};
576
577
578/*
579 * Initialize sysfs entry for each controller. This sets up and registers
580 * the 'cciss#' directory for each individual controller under
581 * /sys/bus/pci/devices/<dev>/.
582 */
583static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
584{
585 device_initialize(&h->dev);
586 h->dev.type = &cciss_host_type;
587 h->dev.bus = &cciss_bus_type;
588 dev_set_name(&h->dev, "%s", h->devname);
589 h->dev.parent = &h->pdev->dev;
590
591 return device_add(&h->dev);
592}
593
594/*
595 * Remove sysfs entries for an hba.
596 */
597static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
598{
599 device_del(&h->dev);
600}
601
602/*
603 * Initialize sysfs for each logical drive. This sets up and registers
604 * the 'c#d#' directory for each individual logical drive under
605 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
606 * /sys/block/cciss!c#d# to this entry.
607 */
608static int cciss_create_ld_sysfs_entry(struct ctlr_info *h,
609 drive_info_struct *drv,
610 int drv_index)
611{
612 device_initialize(&drv->dev);
613 drv->dev.type = &cciss_dev_type;
614 drv->dev.bus = &cciss_bus_type;
615 dev_set_name(&drv->dev, "c%dd%d", h->ctlr, drv_index);
616 drv->dev.parent = &h->dev;
617 return device_add(&drv->dev);
618}
619
620/*
621 * Remove sysfs entries for a logical drive.
622 */
623static void cciss_destroy_ld_sysfs_entry(drive_info_struct *drv)
624{
625 device_del(&drv->dev);
626}
627
7c832835
BH		 628/*
629 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 630 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 631 * which ones are free or in use. For operations that can wait for kmalloc
632 * to possible sleep, this routine can be called with get_from_pool set to 0.
633 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
634 */
635static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 636{
637 CommandList_struct *c;
7c832835 638 int i;
1da177e4
LT		 639 u64bit temp64;
640 dma_addr_t cmd_dma_handle, err_dma_handle;
641
7c832835
BH		 642 if (!get_from_pool) {
643 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
644 sizeof(CommandList_struct), &cmd_dma_handle);
645 if (c == NULL)
646 return NULL;
1da177e4
LT		 647 memset(c, 0, sizeof(CommandList_struct));
648
33079b21
MM		 649 c->cmdindex = -1;
650
7c832835
BH		 651 c->err_info = (ErrorInfo_struct *)
652 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
653 &err_dma_handle);
654
655 if (c->err_info == NULL) {
656 pci_free_consistent(h->pdev,
1da177e4
LT		 657 sizeof(CommandList_struct), c, cmd_dma_handle);
658 return NULL;
659 }
660 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 661 } else { /* get it out of the controllers pool */
662
663 do {
f880632f
MM		 664 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
665 if (i == h->nr_cmds)
7c832835
BH		 666 return NULL;
667 } while (test_and_set_bit
668 (i & (BITS_PER_LONG - 1),
669 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 670#ifdef CCISS_DEBUG
671 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
672#endif
7c832835 673 c = h->cmd_pool + i;
1da177e4 674 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 675 cmd_dma_handle = h->cmd_pool_dhandle
676 + i * sizeof(CommandList_struct);
1da177e4
LT		 677 c->err_info = h->errinfo_pool + i;
678 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 679 err_dma_handle = h->errinfo_pool_dhandle
680 + i * sizeof(ErrorInfo_struct);
681 h->nr_allocs++;
33079b21
MM		 682
683 c->cmdindex = i;
7c832835 684 }
1da177e4 685
8a3173de 686 INIT_HLIST_NODE(&c->list);
1da177e4 687 c->busaddr = (__u32) cmd_dma_handle;
7c832835 688 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 689 c->ErrDesc.Addr.lower = temp64.val32.lower;
690 c->ErrDesc.Addr.upper = temp64.val32.upper;
691 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 692
7c832835
BH		 693 c->ctlr = h->ctlr;
694 return c;
1da177e4
LT		 695}
696
7c832835
BH		 697/*
698 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 699 */
700static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
701{
702 int i;
703 u64bit temp64;
704
7c832835 705 if (!got_from_pool) {
1da177e4
LT		 706 temp64.val32.lower = c->ErrDesc.Addr.lower;
707 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 708 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
709 c->err_info, (dma_addr_t) temp64.val);
710 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
711 c, (dma_addr_t) c->busaddr);
712 } else {
1da177e4 713 i = c - h->cmd_pool;
7c832835
BH		 714 clear_bit(i & (BITS_PER_LONG - 1),
715 h->cmd_pool_bits + (i / BITS_PER_LONG));
716 h->nr_frees++;
717 }
1da177e4
LT		 718}
719
720static inline ctlr_info_t *get_host(struct gendisk *disk)
721{
7c832835 722 return disk->queue->queuedata;
1da177e4
LT		 723}
724
725static inline drive_info_struct *get_drv(struct gendisk *disk)
726{
727 return disk->private_data;
728}
729
730/*
731 * Open. Make sure the device is really there.
732 */
ef7822c2 733static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 734{
ef7822c2
AV		 735 ctlr_info_t *host = get_host(bdev->bd_disk);
736 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 737
738#ifdef CCISS_DEBUG
ef7822c2 739 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 740#endif /* CCISS_DEBUG */
1da177e4 741
ddd47442
MM		 742 if (host->busy_initializing || drv->busy_configuring)
743 return -EBUSY;
1da177e4
LT		 744 /*
745 * Root is allowed to open raw volume zero even if it's not configured
746 * so array config can still work. Root is also allowed to open any
747 * volume that has a LUN ID, so it can issue IOCTL to reread the
748 * disk information. I don't think I really like this
749 * but I'm already using way to many device nodes to claim another one
750 * for "raw controller".
751 */
7a06f789 752 if (drv->heads == 0) {
ef7822c2 753 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 754 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 755 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 756 return -ENXIO;
1da177e4
LT		 757 /* if it is, make sure we have a LUN ID */
758 } else if (drv->LunID == 0) {
759 return -ENXIO;
760 }
761 }
762 if (!capable(CAP_SYS_ADMIN))
763 return -EPERM;
764 }
765 drv->usage_count++;
766 host->usage_count++;
767 return 0;
768}
7c832835 769
1da177e4
LT		 770/*
771 * Close. Sync first.
772 */
ef7822c2 773static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 774{
ef7822c2
AV		 775 ctlr_info_t *host = get_host(disk);
776 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 777
778#ifdef CCISS_DEBUG
ef7822c2 779 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 780#endif /* CCISS_DEBUG */
1da177e4
LT		 781
782 drv->usage_count--;
783 host->usage_count--;
784 return 0;
785}
786
787#ifdef CONFIG_COMPAT
788
ef7822c2
AV		 789static int do_ioctl(struct block_device *bdev, fmode_t mode,
790 unsigned cmd, unsigned long arg)
1da177e4
LT		 791{
792 int ret;
793 lock_kernel();
ef7822c2 794 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 795 unlock_kernel();
796 return ret;
797}
798
ef7822c2
AV		 799static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
800 unsigned cmd, unsigned long arg);
801static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
802 unsigned cmd, unsigned long arg);
1da177e4 803
ef7822c2
AV		 804static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
805 unsigned cmd, unsigned long arg)
1da177e4
LT		 806{
807 switch (cmd) {
808 case CCISS_GETPCIINFO:
809 case CCISS_GETINTINFO:
810 case CCISS_SETINTINFO:
811 case CCISS_GETNODENAME:
812 case CCISS_SETNODENAME:
813 case CCISS_GETHEARTBEAT:
814 case CCISS_GETBUSTYPES:
815 case CCISS_GETFIRMVER:
816 case CCISS_GETDRIVVER:
817 case CCISS_REVALIDVOLS:
818 case CCISS_DEREGDISK:
819 case CCISS_REGNEWDISK:
820 case CCISS_REGNEWD:
821 case CCISS_RESCANDISK:
822 case CCISS_GETLUNINFO:
ef7822c2 823 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 824
825 case CCISS_PASSTHRU32:
ef7822c2 826 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 827 case CCISS_BIG_PASSTHRU32:
ef7822c2 828 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 829
830 default:
831 return -ENOIOCTLCMD;
832 }
833}
834
ef7822c2
AV		 835static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
836 unsigned cmd, unsigned long arg)
1da177e4
LT		 837{
838 IOCTL32_Command_struct __user *arg32 =
7c832835 839 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 840 IOCTL_Command_struct arg64;
841 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
842 int err;
843 u32 cp;
844
845 err = 0;
7c832835
BH		 846 err |=
847 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
848 sizeof(arg64.LUN_info));
849 err |=
850 copy_from_user(&arg64.Request, &arg32->Request,
851 sizeof(arg64.Request));
852 err |=
853 copy_from_user(&arg64.error_info, &arg32->error_info,
854 sizeof(arg64.error_info));
1da177e4
LT		 855 err |= get_user(arg64.buf_size, &arg32->buf_size);
856 err |= get_user(cp, &arg32->buf);
857 arg64.buf = compat_ptr(cp);
858 err |= copy_to_user(p, &arg64, sizeof(arg64));
859
860 if (err)
861 return -EFAULT;
862
ef7822c2 863 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 864 if (err)
865 return err;
7c832835
BH		 866 err |=
867 copy_in_user(&arg32->error_info, &p->error_info,
868 sizeof(arg32->error_info));
1da177e4
LT		 869 if (err)
870 return -EFAULT;
871 return err;
872}
873
ef7822c2
AV		 874static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
875 unsigned cmd, unsigned long arg)
1da177e4
LT		 876{
877 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 878 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 879 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 880 BIG_IOCTL_Command_struct __user *p =
881 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 882 int err;
883 u32 cp;
884
885 err = 0;
7c832835
BH		 886 err |=
887 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
888 sizeof(arg64.LUN_info));
889 err |=
890 copy_from_user(&arg64.Request, &arg32->Request,
891 sizeof(arg64.Request));
892 err |=
893 copy_from_user(&arg64.error_info, &arg32->error_info,
894 sizeof(arg64.error_info));
1da177e4
LT		 895 err |= get_user(arg64.buf_size, &arg32->buf_size);
896 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
897 err |= get_user(cp, &arg32->buf);
898 arg64.buf = compat_ptr(cp);
899 err |= copy_to_user(p, &arg64, sizeof(arg64));
900
901 if (err)
7c832835 902 return -EFAULT;
1da177e4 903
ef7822c2 904 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 905 if (err)
906 return err;
7c832835
BH		 907 err |=
908 copy_in_user(&arg32->error_info, &p->error_info,
909 sizeof(arg32->error_info));
1da177e4
LT		 910 if (err)
911 return -EFAULT;
912 return err;
913}
914#endif
a885c8c4
CH		 915
916static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
917{
918 drive_info_struct *drv = get_drv(bdev->bd_disk);
919
920 if (!drv->cylinders)
921 return -ENXIO;
922
923 geo->heads = drv->heads;
924 geo->sectors = drv->sectors;
925 geo->cylinders = drv->cylinders;
926 return 0;
927}
928
0a9279cc
MM		 929static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
930{
931 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
932 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
933 (void)check_for_unit_attention(host, c);
934}
1da177e4 935/*
7c832835 936 * ioctl
1da177e4 937 */
ef7822c2 938static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 939 unsigned int cmd, unsigned long arg)
1da177e4 940{
1da177e4
LT		 941 struct gendisk *disk = bdev->bd_disk;
942 ctlr_info_t *host = get_host(disk);
943 drive_info_struct *drv = get_drv(disk);
944 int ctlr = host->ctlr;
945 void __user *argp = (void __user *)arg;
946
947#ifdef CCISS_DEBUG
948 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 949#endif /* CCISS_DEBUG */
950
951 switch (cmd) {
1da177e4 952 case CCISS_GETPCIINFO:
7c832835
BH		 953 {
954 cciss_pci_info_struct pciinfo;
955
956 if (!arg)
957 return -EINVAL;
958 pciinfo.domain = pci_domain_nr(host->pdev->bus);
959 pciinfo.bus = host->pdev->bus->number;
960 pciinfo.dev_fn = host->pdev->devfn;
961 pciinfo.board_id = host->board_id;
962 if (copy_to_user
963 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
964 return -EFAULT;
965 return 0;
966 }
1da177e4 967 case CCISS_GETINTINFO:
7c832835
BH		 968 {
969 cciss_coalint_struct intinfo;
970 if (!arg)
971 return -EINVAL;
972 intinfo.delay =
973 readl(&host->cfgtable->HostWrite.CoalIntDelay);
974 intinfo.count =
975 readl(&host->cfgtable->HostWrite.CoalIntCount);
976 if (copy_to_user
977 (argp, &intinfo, sizeof(cciss_coalint_struct)))
978 return -EFAULT;
979 return 0;
980 }
1da177e4 981 case CCISS_SETINTINFO:
1da177e4 982 {
7c832835
BH		 983 cciss_coalint_struct intinfo;
984 unsigned long flags;
985 int i;
986
987 if (!arg)
988 return -EINVAL;
989 if (!capable(CAP_SYS_ADMIN))
990 return -EPERM;
991 if (copy_from_user
992 (&intinfo, argp, sizeof(cciss_coalint_struct)))
993 return -EFAULT;
994 if ((intinfo.delay == 0) && (intinfo.count == 0))
995 {
996// printk("cciss_ioctl: delay and count cannot be 0\n");
997 return -EINVAL;
998 }
999 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1000 /* Update the field, and then ring the doorbell */
1001 writel(intinfo.delay,
1002 &(host->cfgtable->HostWrite.CoalIntDelay));
1003 writel(intinfo.count,
1004 &(host->cfgtable->HostWrite.CoalIntCount));
1005 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1006
1007 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1008 if (!(readl(host->vaddr + SA5_DOORBELL)
1009 & CFGTBL_ChangeReq))
1010 break;
1011 /* delay and try again */
1012 udelay(1000);
1013 }
1014 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1015 if (i >= MAX_IOCTL_CONFIG_WAIT)
1016 return -EAGAIN;
1017 return 0;
1da177e4 1018 }
1da177e4 1019 case CCISS_GETNODENAME:
7c832835
BH		 1020 {
1021 NodeName_type NodeName;
1022 int i;
1023
1024 if (!arg)
1025 return -EINVAL;
1026 for (i = 0; i < 16; i++)
1027 NodeName[i] =
1028 readb(&host->cfgtable->ServerName[i]);
1029 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1030 return -EFAULT;
1031 return 0;
1032 }
1da177e4 1033 case CCISS_SETNODENAME:
7c832835
BH		 1034 {
1035 NodeName_type NodeName;
1036 unsigned long flags;
1037 int i;
1038
1039 if (!arg)
1040 return -EINVAL;
1041 if (!capable(CAP_SYS_ADMIN))
1042 return -EPERM;
1043
1044 if (copy_from_user
1045 (NodeName, argp, sizeof(NodeName_type)))
1046 return -EFAULT;
1047
1048 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1049
1050 /* Update the field, and then ring the doorbell */
1051 for (i = 0; i < 16; i++)
1052 writeb(NodeName[i],
1053 &host->cfgtable->ServerName[i]);
1054
1055 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1056
1057 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1058 if (!(readl(host->vaddr + SA5_DOORBELL)
1059 & CFGTBL_ChangeReq))
1060 break;
1061 /* delay and try again */
1062 udelay(1000);
1063 }
1064 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1065 if (i >= MAX_IOCTL_CONFIG_WAIT)
1066 return -EAGAIN;
1067 return 0;
1068 }
1da177e4
LT		 1069
1070 case CCISS_GETHEARTBEAT:
7c832835
BH		 1071 {
1072 Heartbeat_type heartbeat;
1073
1074 if (!arg)
1075 return -EINVAL;
1076 heartbeat = readl(&host->cfgtable->HeartBeat);
1077 if (copy_to_user
1078 (argp, &heartbeat, sizeof(Heartbeat_type)))
1079 return -EFAULT;
1080 return 0;
1081 }
1da177e4 1082 case CCISS_GETBUSTYPES:
7c832835
BH		 1083 {
1084 BusTypes_type BusTypes;
1085
1086 if (!arg)
1087 return -EINVAL;
1088 BusTypes = readl(&host->cfgtable->BusTypes);
1089 if (copy_to_user
1090 (argp, &BusTypes, sizeof(BusTypes_type)))
1091 return -EFAULT;
1092 return 0;
1093 }
1da177e4 1094 case CCISS_GETFIRMVER:
7c832835
BH		 1095 {
1096 FirmwareVer_type firmware;
1da177e4 1097
7c832835
BH		 1098 if (!arg)
1099 return -EINVAL;
1100 memcpy(firmware, host->firm_ver, 4);
1da177e4 1101
7c832835
BH		 1102 if (copy_to_user
1103 (argp, firmware, sizeof(FirmwareVer_type)))
1104 return -EFAULT;
1105 return 0;
1106 }
1107 case CCISS_GETDRIVVER:
1108 {
1109 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1110
7c832835
BH		 1111 if (!arg)
1112 return -EINVAL;
1da177e4 1113
7c832835
BH		 1114 if (copy_to_user
1115 (argp, &DriverVer, sizeof(DriverVer_type)))
1116 return -EFAULT;
1117 return 0;
1118 }
1da177e4 1119
6ae5ce8e
MM		 1120 case CCISS_DEREGDISK:
1121 case CCISS_REGNEWD:
1da177e4 1122 case CCISS_REVALIDVOLS:
6ae5ce8e 1123 return rebuild_lun_table(host, 0);
7c832835
BH		 1124
1125 case CCISS_GETLUNINFO:{
1126 LogvolInfo_struct luninfo;
1127
1128 luninfo.LunID = drv->LunID;
1129 luninfo.num_opens = drv->usage_count;
1130 luninfo.num_parts = 0;
1131 if (copy_to_user(argp, &luninfo,
1132 sizeof(LogvolInfo_struct)))
1133 return -EFAULT;
1134 return 0;
1135 }
1da177e4 1136 case CCISS_PASSTHRU:
1da177e4 1137 {
7c832835
BH		 1138 IOCTL_Command_struct iocommand;
1139 CommandList_struct *c;
1140 char *buff = NULL;
1141 u64bit temp64;
1142 unsigned long flags;
6e9a4738 1143 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1144
7c832835
BH		 1145 if (!arg)
1146 return -EINVAL;
1da177e4 1147
7c832835
BH		 1148 if (!capable(CAP_SYS_RAWIO))
1149 return -EPERM;
1da177e4 1150
7c832835
BH		 1151 if (copy_from_user
1152 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1153 return -EFAULT;
1154 if ((iocommand.buf_size < 1) &&
1155 (iocommand.Request.Type.Direction != XFER_NONE)) {
1156 return -EINVAL;
1157 }
1158#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1159 /* Check kmalloc limits */
1160 if (iocommand.buf_size > 128000)
1161 return -EINVAL;
1162#endif
1163 if (iocommand.buf_size > 0) {
1164 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1165 if (buff == NULL)
1166 return -EFAULT;
1167 }
1168 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1169 /* Copy the data into the buffer we created */
1170 if (copy_from_user
1171 (buff, iocommand.buf, iocommand.buf_size)) {
1172 kfree(buff);
1173 return -EFAULT;
1174 }
1175 } else {
1176 memset(buff, 0, iocommand.buf_size);
1177 }
1178 if ((c = cmd_alloc(host, 0)) == NULL) {
1179 kfree(buff);
1180 return -ENOMEM;
1181 }
1182 // Fill in the command type
1183 c->cmd_type = CMD_IOCTL_PEND;
1184 // Fill in Command Header
1185 c->Header.ReplyQueue = 0; // unused in simple mode
1186 if (iocommand.buf_size > 0) // buffer to fill
1187 {
1188 c->Header.SGList = 1;
1189 c->Header.SGTotal = 1;
1190 } else // no buffers to fill
1191 {
1192 c->Header.SGList = 0;
1193 c->Header.SGTotal = 0;
1194 }
1195 c->Header.LUN = iocommand.LUN_info;
1196 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1197
7c832835
BH		 1198 // Fill in Request block
1199 c->Request = iocommand.Request;
1da177e4 1200
7c832835
BH		 1201 // Fill in the scatter gather information
1202 if (iocommand.buf_size > 0) {
1203 temp64.val = pci_map_single(host->pdev, buff,
1204 iocommand.buf_size,
1205 PCI_DMA_BIDIRECTIONAL);
1206 c->SG[0].Addr.lower = temp64.val32.lower;
1207 c->SG[0].Addr.upper = temp64.val32.upper;
1208 c->SG[0].Len = iocommand.buf_size;
1209 c->SG[0].Ext = 0; // we are not chaining
1210 }
1211 c->waiting = &wait;
1212
1213 /* Put the request on the tail of the request queue */
1214 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1215 addQ(&host->reqQ, c);
1216 host->Qdepth++;
1217 start_io(host);
1218 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1219
1220 wait_for_completion(&wait);
1221
1222 /* unlock the buffers from DMA */
1223 temp64.val32.lower = c->SG[0].Addr.lower;
1224 temp64.val32.upper = c->SG[0].Addr.upper;
1225 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1226 iocommand.buf_size,
1227 PCI_DMA_BIDIRECTIONAL);
1228
0a9279cc
MM		 1229 check_ioctl_unit_attention(host, c);
1230
7c832835
BH		 1231 /* Copy the error information out */
1232 iocommand.error_info = *(c->err_info);
1233 if (copy_to_user
1234 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1235 kfree(buff);
1da177e4
LT		 1236 cmd_free(host, c, 0);
1237 return -EFAULT;
1238 }
7c832835
BH		 1239
1240 if (iocommand.Request.Type.Direction == XFER_READ) {
1241 /* Copy the data out of the buffer we created */
1242 if (copy_to_user
1243 (iocommand.buf, buff, iocommand.buf_size)) {
1244 kfree(buff);
1245 cmd_free(host, c, 0);
1246 return -EFAULT;
1247 }
1248 }
1249 kfree(buff);
1250 cmd_free(host, c, 0);
1251 return 0;
1da177e4 1252 }
7c832835
BH		 1253 case CCISS_BIG_PASSTHRU:{
1254 BIG_IOCTL_Command_struct *ioc;
1255 CommandList_struct *c;
1256 unsigned char **buff = NULL;
1257 int *buff_size = NULL;
1258 u64bit temp64;
1259 unsigned long flags;
1260 BYTE sg_used = 0;
1261 int status = 0;
1262 int i;
6e9a4738 1263 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1264 __u32 left;
1265 __u32 sz;
1266 BYTE __user *data_ptr;
1267
1268 if (!arg)
1269 return -EINVAL;
1270 if (!capable(CAP_SYS_RAWIO))
1271 return -EPERM;
1272 ioc = (BIG_IOCTL_Command_struct *)
1273 kmalloc(sizeof(*ioc), GFP_KERNEL);
1274 if (!ioc) {
1275 status = -ENOMEM;
1276 goto cleanup1;
1277 }
1278 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1279 status = -EFAULT;
1280 goto cleanup1;
1281 }
1282 if ((ioc->buf_size < 1) &&
1283 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1284 status = -EINVAL;
1285 goto cleanup1;
7c832835
BH		 1286 }
1287 /* Check kmalloc limits using all SGs */
1288 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1289 status = -EINVAL;
1290 goto cleanup1;
1291 }
1292 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1293 status = -EINVAL;
1294 goto cleanup1;
1295 }
1296 buff =
1297 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1298 if (!buff) {
1da177e4
LT		 1299 status = -ENOMEM;
1300 goto cleanup1;
1301 }
5cbded58 1302 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1303 GFP_KERNEL);
1304 if (!buff_size) {
1305 status = -ENOMEM;
1306 goto cleanup1;
1307 }
1308 left = ioc->buf_size;
1309 data_ptr = ioc->buf;
1310 while (left) {
1311 sz = (left >
1312 ioc->malloc_size) ? ioc->
1313 malloc_size : left;
1314 buff_size[sg_used] = sz;
1315 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1316 if (buff[sg_used] == NULL) {
1da177e4 1317 status = -ENOMEM;
15534d38
JA		 1318 goto cleanup1;
1319 }
7c832835
BH		 1320 if (ioc->Request.Type.Direction == XFER_WRITE) {
1321 if (copy_from_user
1322 (buff[sg_used], data_ptr, sz)) {
f7108f91 1323 status = -EFAULT;
7c832835
BH		 1324 goto cleanup1;
1325 }
1326 } else {
1327 memset(buff[sg_used], 0, sz);
1328 }
1329 left -= sz;
1330 data_ptr += sz;
1331 sg_used++;
1332 }
1333 if ((c = cmd_alloc(host, 0)) == NULL) {
1334 status = -ENOMEM;
1335 goto cleanup1;
1336 }
1337 c->cmd_type = CMD_IOCTL_PEND;
1338 c->Header.ReplyQueue = 0;
1339
1340 if (ioc->buf_size > 0) {
1341 c->Header.SGList = sg_used;
1342 c->Header.SGTotal = sg_used;
1da177e4 1343 } else {
7c832835
BH		 1344 c->Header.SGList = 0;
1345 c->Header.SGTotal = 0;
1da177e4 1346 }
7c832835
BH		 1347 c->Header.LUN = ioc->LUN_info;
1348 c->Header.Tag.lower = c->busaddr;
1349
1350 c->Request = ioc->Request;
1351 if (ioc->buf_size > 0) {
1352 int i;
1353 for (i = 0; i < sg_used; i++) {
1354 temp64.val =
1355 pci_map_single(host->pdev, buff[i],
1356 buff_size[i],
1357 PCI_DMA_BIDIRECTIONAL);
1358 c->SG[i].Addr.lower =
1359 temp64.val32.lower;
1360 c->SG[i].Addr.upper =
1361 temp64.val32.upper;
1362 c->SG[i].Len = buff_size[i];
1363 c->SG[i].Ext = 0; /* we are not chaining */
1364 }
1365 }
1366 c->waiting = &wait;
1367 /* Put the request on the tail of the request queue */
1368 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1369 addQ(&host->reqQ, c);
1370 host->Qdepth++;
1371 start_io(host);
1372 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1373 wait_for_completion(&wait);
1374 /* unlock the buffers from DMA */
1375 for (i = 0; i < sg_used; i++) {
1376 temp64.val32.lower = c->SG[i].Addr.lower;
1377 temp64.val32.upper = c->SG[i].Addr.upper;
1378 pci_unmap_single(host->pdev,
1379 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1380 PCI_DMA_BIDIRECTIONAL);
1da177e4 1381 }
0a9279cc 1382 check_ioctl_unit_attention(host, c);
7c832835
BH		 1383 /* Copy the error information out */
1384 ioc->error_info = *(c->err_info);
1385 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1386 cmd_free(host, c, 0);
1387 status = -EFAULT;
1388 goto cleanup1;
1389 }
1390 if (ioc->Request.Type.Direction == XFER_READ) {
1391 /* Copy the data out of the buffer we created */
1392 BYTE __user *ptr = ioc->buf;
1393 for (i = 0; i < sg_used; i++) {
1394 if (copy_to_user
1395 (ptr, buff[i], buff_size[i])) {
1396 cmd_free(host, c, 0);
1397 status = -EFAULT;
1398 goto cleanup1;
1399 }
1400 ptr += buff_size[i];
1da177e4 1401 }
1da177e4 1402 }
7c832835
BH		 1403 cmd_free(host, c, 0);
1404 status = 0;
1405 cleanup1:
1406 if (buff) {
1407 for (i = 0; i < sg_used; i++)
1408 kfree(buff[i]);
1409 kfree(buff);
1410 }
1411 kfree(buff_size);
1412 kfree(ioc);
1413 return status;
1da177e4 1414 }
03bbfee5
MMOD		 1415
1416 /* scsi_cmd_ioctl handles these, below, though some are not */
1417 /* very meaningful for cciss. SG_IO is the main one people want. */
1418
1419 case SG_GET_VERSION_NUM:
1420 case SG_SET_TIMEOUT:
1421 case SG_GET_TIMEOUT:
1422 case SG_GET_RESERVED_SIZE:
1423 case SG_SET_RESERVED_SIZE:
1424 case SG_EMULATED_HOST:
1425 case SG_IO:
1426 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1427 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1428
1429 /* scsi_cmd_ioctl would normally handle these, below, but */
1430 /* they aren't a good fit for cciss, as CD-ROMs are */
1431 /* not supported, and we don't have any bus/target/lun */
1432 /* which we present to the kernel. */
1433
1434 case CDROM_SEND_PACKET:
1435 case CDROMCLOSETRAY:
1436 case CDROMEJECT:
1437 case SCSI_IOCTL_GET_IDLUN:
1438 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1439 default:
1440 return -ENOTTY;
1441 }
1da177e4
LT		 1442}
1443
7b30f092
JA		 1444static void cciss_check_queues(ctlr_info_t *h)
1445{
1446 int start_queue = h->next_to_run;
1447 int i;
1448
1449 /* check to see if we have maxed out the number of commands that can
1450 * be placed on the queue. If so then exit. We do this check here
1451 * in case the interrupt we serviced was from an ioctl and did not
1452 * free any new commands.
1453 */
f880632f 1454 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1455 return;
1456
1457 /* We have room on the queue for more commands. Now we need to queue
1458 * them up. We will also keep track of the next queue to run so
1459 * that every queue gets a chance to be started first.
1460 */
1461 for (i = 0; i < h->highest_lun + 1; i++) {
1462 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1463 /* make sure the disk has been added and the drive is real
1464 * because this can be called from the middle of init_one.
1465 */
1466 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1467 continue;
1468 blk_start_queue(h->gendisk[curr_queue]->queue);
1469
1470 /* check to see if we have maxed out the number of commands
1471 * that can be placed on the queue.
1472 */
f880632f 1473 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1474 if (curr_queue == start_queue) {
1475 h->next_to_run =
1476 (start_queue + 1) % (h->highest_lun + 1);
1477 break;
1478 } else {
1479 h->next_to_run = curr_queue;
1480 break;
1481 }
7b30f092
JA		 1482 }
1483 }
1484}
1485
ca1e0484
MM		 1486static void cciss_softirq_done(struct request *rq)
1487{
1488 CommandList_struct *cmd = rq->completion_data;
1489 ctlr_info_t *h = hba[cmd->ctlr];
1490 unsigned long flags;
1491 u64bit temp64;
1492 int i, ddir;
1493
1494 if (cmd->Request.Type.Direction == XFER_READ)
1495 ddir = PCI_DMA_FROMDEVICE;
1496 else
1497 ddir = PCI_DMA_TODEVICE;
1498
1499 /* command did not need to be retried */
1500 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1501 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1502 temp64.val32.lower = cmd->SG[i].Addr.lower;
1503 temp64.val32.upper = cmd->SG[i].Addr.upper;
1504 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1505 }
1506
ca1e0484
MM		 1507#ifdef CCISS_DEBUG
1508 printk("Done with %p\n", rq);
7c832835 1509#endif /* CCISS_DEBUG */
ca1e0484 1510
c3a4d78c 1511 /* set the residual count for pc requests */
ac44e5b2 1512 if (blk_pc_request(rq))
c3a4d78c 1513 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1514
c3a4d78c 1515 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1516
ca1e0484 1517 spin_lock_irqsave(&h->lock, flags);
7c832835 1518 cmd_free(h, cmd, 1);
7b30f092 1519 cciss_check_queues(h);
ca1e0484
MM		 1520 spin_unlock_irqrestore(&h->lock, flags);
1521}
1522
7fe06326
AP		 1523/* This function gets the SCSI vendor, model, and revision of a logical drive
1524 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1525 * they cannot be read.
1526 */
1527static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1528 char *vendor, char *model, char *rev)
1529{
1530 int rc;
1531 InquiryData_struct *inq_buf;
1532
1533 *vendor = '\0';
1534 *model = '\0';
1535 *rev = '\0';
1536
1537 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1538 if (!inq_buf)
1539 return;
1540
1541 if (withirq)
1542 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
1543 sizeof(InquiryData_struct), 1, logvol,
1544 0, TYPE_CMD);
1545 else
1546 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
1547 sizeof(InquiryData_struct), 1, logvol, 0, NULL,
1548 TYPE_CMD);
1549 if (rc == IO_OK) {
1550 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1551 vendor[VENDOR_LEN] = '\0';
1552 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1553 model[MODEL_LEN] = '\0';
1554 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1555 rev[REV_LEN] = '\0';
1556 }
1557
1558 kfree(inq_buf);
1559 return;
1560}
1561
a72da29b
MM		 1562/* This function gets the serial number of a logical drive via
1563 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1564 * number cannot be had, for whatever reason, 16 bytes of 0xff
1565 * are returned instead.
1566 */
1567static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1568 unsigned char *serial_no, int buflen)
1569{
1570#define PAGE_83_INQ_BYTES 64
1571 int rc;
1572 unsigned char *buf;
1573
1574 if (buflen > 16)
1575 buflen = 16;
1576 memset(serial_no, 0xff, buflen);
1577 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1578 if (!buf)
1579 return;
1580 memset(serial_no, 0, buflen);
1581 if (withirq)
1582 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1583 PAGE_83_INQ_BYTES, 1, logvol, 0x83, TYPE_CMD);
1584 else
1585 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
1586 PAGE_83_INQ_BYTES, 1, logvol, 0x83, NULL, TYPE_CMD);
1587 if (rc == IO_OK)
1588 memcpy(serial_no, &buf[8], buflen);
1589 kfree(buf);
1590 return;
1591}
1592
6ae5ce8e
MM		 1593static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1594 int drv_index)
1595{
1596 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1597 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1598 disk->major = h->major;
1599 disk->first_minor = drv_index << NWD_SHIFT;
1600 disk->fops = &cciss_fops;
1601 disk->private_data = &h->drv[drv_index];
7fe06326 1602 disk->driverfs_dev = &h->drv[drv_index].dev;
6ae5ce8e
MM		 1603
1604 /* Set up queue information */
1605 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1606
1607 /* This is a hardware imposed limit. */
1608 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1609
1610 /* This is a limit in the driver and could be eliminated. */
1611 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1612
1613 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1614
1615 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1616
1617 disk->queue->queuedata = h;
1618
e1defc4f
MP		 1619 blk_queue_logical_block_size(disk->queue,
1620 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1621
1622 /* Make sure all queue data is written out before */
1623 /* setting h->drv[drv_index].queue, as setting this */
1624 /* allows the interrupt handler to start the queue */
1625 wmb();
1626 h->drv[drv_index].queue = disk->queue;
1627 add_disk(disk);
1628}
1629
ddd47442 1630/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1631 * If the usage_count is zero and it is a heretofore unknown drive, or,
1632 * the drive's capacity, geometry, or serial number has changed,
1633 * then the drive information will be updated and the disk will be
1634 * re-registered with the kernel. If these conditions don't hold,
1635 * then it will be left alone for the next reboot. The exception to this
1636 * is disk 0 which will always be left registered with the kernel since it
1637 * is also the controller node. Any changes to disk 0 will show up on
1638 * the next reboot.
7c832835 1639 */
6ae5ce8e 1640static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
7c832835 1641{
ddd47442
MM		 1642 ctlr_info_t *h = hba[ctlr];
1643 struct gendisk *disk;
ddd47442
MM		 1644 InquiryData_struct *inq_buff = NULL;
1645 unsigned int block_size;
00988a35 1646 sector_t total_size;
ddd47442
MM		 1647 unsigned long flags = 0;
1648 int ret = 0;
a72da29b 1649 drive_info_struct *drvinfo;
6ae5ce8e 1650 int was_only_controller_node;
a72da29b
MM		 1651
1652 /* Get information about the disk and modify the driver structure */
1653 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1654 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1655 if (inq_buff == NULL || drvinfo == NULL)
1656 goto mem_msg;
1657
6ae5ce8e
MM		 1658 /* See if we're trying to update the "controller node"
1659 * this will happen the when the first logical drive gets
1660 * created by ACU.
1661 */
1662 was_only_controller_node = (drv_index == 0 &&
1663 h->drv[0].raid_level == -1);
1664
a72da29b
MM		 1665 /* testing to see if 16-byte CDBs are already being used */
1666 if (h->cciss_read == CCISS_READ_16) {
1667 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1668 &total_size, &block_size);
1669
1670 } else {
1671 cciss_read_capacity(ctlr, drv_index, 1,
1672 &total_size, &block_size);
1673
1674 /* if read_capacity returns all F's this volume is >2TB */
1675 /* in size so we switch to 16-byte CDB's for all */
1676 /* read/write ops */
1677 if (total_size == 0xFFFFFFFFULL) {
1678 cciss_read_capacity_16(ctlr, drv_index, 1,
1679 &total_size, &block_size);
1680 h->cciss_read = CCISS_READ_16;
1681 h->cciss_write = CCISS_WRITE_16;
1682 } else {
1683 h->cciss_read = CCISS_READ_10;
1684 h->cciss_write = CCISS_WRITE_10;
1685 }
1686 }
1687
1688 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1689 inq_buff, drvinfo);
1690 drvinfo->block_size = block_size;
1691 drvinfo->nr_blocks = total_size + 1;
1692
7fe06326
AP		 1693 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1694 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1695 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1696 sizeof(drvinfo->serial_no));
1697
1698 /* Is it the same disk we already know, and nothing's changed? */
1699 if (h->drv[drv_index].raid_level != -1 &&
1700 ((memcmp(drvinfo->serial_no,
1701 h->drv[drv_index].serial_no, 16) == 0) &&
1702 drvinfo->block_size == h->drv[drv_index].block_size &&
1703 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1704 drvinfo->heads == h->drv[drv_index].heads &&
1705 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1706 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1707 /* The disk is unchanged, nothing to update */
1708 goto freeret;
a72da29b 1709
6ae5ce8e
MM		 1710 /* If we get here it's not the same disk, or something's changed,
1711 * so we need to * deregister it, and re-register it, if it's not
1712 * in use.
1713 * If the disk already exists then deregister it before proceeding
1714 * (unless it's the first disk (for the controller node).
1715 */
a72da29b
MM		 1716 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1717 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1718 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1719 h->drv[drv_index].busy_configuring = 1;
1720 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1721
6ae5ce8e
MM		 1722 /* deregister_disk sets h->drv[drv_index].queue = NULL
1723 * which keeps the interrupt handler from starting
1724 * the queue.
1725 */
a0ea8622 1726 ret = deregister_disk(h, drv_index, 0);
ddd47442
MM		 1727 h->drv[drv_index].busy_configuring = 0;
1728 }
1729
1730 /* If the disk is in use return */
1731 if (ret)
a72da29b
MM		 1732 goto freeret;
1733
6ae5ce8e
MM		 1734 /* Save the new information from cciss_geometry_inquiry
1735 * and serial number inquiry.
1736 */
a72da29b
MM		 1737 h->drv[drv_index].block_size = drvinfo->block_size;
1738 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1739 h->drv[drv_index].heads = drvinfo->heads;
1740 h->drv[drv_index].sectors = drvinfo->sectors;
1741 h->drv[drv_index].cylinders = drvinfo->cylinders;
1742 h->drv[drv_index].raid_level = drvinfo->raid_level;
1743 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1744 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1745 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1746 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1747
1748 ++h->num_luns;
1749 disk = h->gendisk[drv_index];
1750 set_capacity(disk, h->drv[drv_index].nr_blocks);
1751
6ae5ce8e
MM		 1752 /* If it's not disk 0 (drv_index != 0)
1753 * or if it was disk 0, but there was previously
1754 * no actual corresponding configured logical drive
1755 * (raid_leve == -1) then we want to update the
1756 * logical drive's information.
1757 */
1758 if (drv_index || first_time)
1759 cciss_add_disk(h, disk, drv_index);
ddd47442 1760
6ae5ce8e 1761freeret:
ddd47442 1762 kfree(inq_buff);
a72da29b 1763 kfree(drvinfo);
ddd47442 1764 return;
6ae5ce8e 1765mem_msg:
ddd47442
MM		 1766 printk(KERN_ERR "cciss: out of memory\n");
1767 goto freeret;
1768}
1769
1770/* This function will find the first index of the controllers drive array
1771 * that has a -1 for the raid_level and will return that index. This is
1772 * where new drives will be added. If the index to be returned is greater
1773 * than the highest_lun index for the controller then highest_lun is set
1774 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1775 * "controller_node" is used to know if this is a real logical drive, or just
1776 * the controller node, which determines if this counts towards highest_lun.
7c832835 1777 */
eece695f 1778static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1779{
1780 int i;
1781
7c832835
BH		 1782 for (i = 0; i < CISS_MAX_LUN; i++) {
1783 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1784 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1785 if (!controller_node)
1786 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1787 return i;
1788 }
1789 }
1790 return -1;
1791}
1792
6ae5ce8e
MM		 1793/* cciss_add_gendisk finds a free hba[]->drv structure
1794 * and allocates a gendisk if needed, and sets the lunid
1795 * in the drvinfo structure. It returns the index into
1796 * the ->drv[] array, or -1 if none are free.
1797 * is_controller_node indicates whether highest_lun should
1798 * count this disk, or if it's only being added to provide
1799 * a means to talk to the controller in case no logical
1800 * drives have yet been configured.
1801 */
eece695f 1802static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
6ae5ce8e
MM		 1803{
1804 int drv_index;
1805
eece695f 1806 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1807 if (drv_index == -1)
1808 return -1;
1809 /*Check if the gendisk needs to be allocated */
1810 if (!h->gendisk[drv_index]) {
1811 h->gendisk[drv_index] =
1812 alloc_disk(1 << NWD_SHIFT);
1813 if (!h->gendisk[drv_index]) {
1814 printk(KERN_ERR "cciss%d: could not "
1815 "allocate a new disk %d\n",
1816 h->ctlr, drv_index);
1817 return -1;
1818 }
1819 }
1820 h->drv[drv_index].LunID = lunid;
7fe06326
AP		 1821 if (cciss_create_ld_sysfs_entry(h, &h->drv[drv_index], drv_index))
1822 goto err_free_disk;
6ae5ce8e
MM		 1823
1824 /* Don't need to mark this busy because nobody */
1825 /* else knows about this disk yet to contend */
1826 /* for access to it. */
1827 h->drv[drv_index].busy_configuring = 0;
1828 wmb();
1829 return drv_index;
7fe06326
AP		 1830
1831err_free_disk:
1832 put_disk(h->gendisk[drv_index]);
1833 h->gendisk[drv_index] = NULL;
1834 return -1;
6ae5ce8e
MM		 1835}
1836
1837/* This is for the special case of a controller which
1838 * has no logical drives. In this case, we still need
1839 * to register a disk so the controller can be accessed
1840 * by the Array Config Utility.
1841 */
1842static void cciss_add_controller_node(ctlr_info_t *h)
1843{
1844 struct gendisk *disk;
1845 int drv_index;
1846
1847 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1848 return;
1849
eece695f 1850 drv_index = cciss_add_gendisk(h, 0, 1);
6ae5ce8e
MM		 1851 if (drv_index == -1) {
1852 printk(KERN_WARNING "cciss%d: could not "
1853 "add disk 0.\n", h->ctlr);
1854 return;
1855 }
1856 h->drv[drv_index].block_size = 512;
1857 h->drv[drv_index].nr_blocks = 0;
1858 h->drv[drv_index].heads = 0;
1859 h->drv[drv_index].sectors = 0;
1860 h->drv[drv_index].cylinders = 0;
1861 h->drv[drv_index].raid_level = -1;
1862 memset(h->drv[drv_index].serial_no, 0, 16);
1863 disk = h->gendisk[drv_index];
1864 cciss_add_disk(h, disk, drv_index);
1865}
1866
ddd47442 1867/* This function will add and remove logical drives from the Logical
d14c4ab5 1868 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 1869 * so that mount points are preserved until the next reboot. This allows
1870 * for the removal of logical drives in the middle of the drive array
1871 * without a re-ordering of those drives.
1872 * INPUT
1873 * h = The controller to perform the operations on
7c832835 1874 */
6ae5ce8e 1875static int rebuild_lun_table(ctlr_info_t *h, int first_time)
1da177e4 1876{
ddd47442
MM		 1877 int ctlr = h->ctlr;
1878 int num_luns;
1879 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 1880 int return_code;
1881 int listlength = 0;
1882 int i;
1883 int drv_found;
1884 int drv_index = 0;
1885 __u32 lunid = 0;
1da177e4 1886 unsigned long flags;
ddd47442 1887
6ae5ce8e
MM		 1888 if (!capable(CAP_SYS_RAWIO))
1889 return -EPERM;
1890
ddd47442
MM		 1891 /* Set busy_configuring flag for this operation */
1892 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 1893 if (h->busy_configuring) {
ddd47442
MM		 1894 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1895 return -EBUSY;
1896 }
1897 h->busy_configuring = 1;
a72da29b 1898 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 1899
a72da29b
MM		 1900 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1901 if (ld_buff == NULL)
1902 goto mem_msg;
1903
1904 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
1905 sizeof(ReportLunData_struct), 0,
1906 0, 0, TYPE_CMD);
ddd47442 1907
a72da29b
MM		 1908 if (return_code == IO_OK)
1909 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
1910 else { /* reading number of logical volumes failed */
1911 printk(KERN_WARNING "cciss: report logical volume"
1912 " command failed\n");
1913 listlength = 0;
1914 goto freeret;
1915 }
1916
1917 num_luns = listlength / 8; /* 8 bytes per entry */
1918 if (num_luns > CISS_MAX_LUN) {
1919 num_luns = CISS_MAX_LUN;
1920 printk(KERN_WARNING "cciss: more luns configured"
1921 " on controller than can be handled by"
1922 " this driver.\n");
1923 }
1924
6ae5ce8e
MM		 1925 if (num_luns == 0)
1926 cciss_add_controller_node(h);
1927
1928 /* Compare controller drive array to driver's drive array
1929 * to see if any drives are missing on the controller due
1930 * to action of Array Config Utility (user deletes drive)
1931 * and deregister logical drives which have disappeared.
1932 */
a72da29b
MM		 1933 for (i = 0; i <= h->highest_lun; i++) {
1934 int j;
1935 drv_found = 0;
d8a0be6a
SC		 1936
1937 /* skip holes in the array from already deleted drives */
1938 if (h->drv[i].raid_level == -1)
1939 continue;
1940
a72da29b
MM		 1941 for (j = 0; j < num_luns; j++) {
1942 memcpy(&lunid, &ld_buff->LUN[j][0], 4);
1943 lunid = le32_to_cpu(lunid);
1944 if (h->drv[i].LunID == lunid) {
1945 drv_found = 1;
1946 break;
1947 }
1948 }
1949 if (!drv_found) {
1950 /* Deregister it from the OS, it's gone. */
1951 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1952 h->drv[i].busy_configuring = 1;
1953 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
a0ea8622 1954 return_code = deregister_disk(h, i, 1);
7fe06326 1955 cciss_destroy_ld_sysfs_entry(&h->drv[i]);
a72da29b 1956 h->drv[i].busy_configuring = 0;
ddd47442 1957 }
a72da29b 1958 }
ddd47442 1959
a72da29b
MM		 1960 /* Compare controller drive array to driver's drive array.
1961 * Check for updates in the drive information and any new drives
1962 * on the controller due to ACU adding logical drives, or changing
1963 * a logical drive's size, etc. Reregister any new/changed drives
1964 */
1965 for (i = 0; i < num_luns; i++) {
1966 int j;
ddd47442 1967
a72da29b 1968 drv_found = 0;
ddd47442 1969
a72da29b
MM		 1970 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
1971 lunid = le32_to_cpu(lunid);
ddd47442 1972
a72da29b
MM		 1973 /* Find if the LUN is already in the drive array
1974 * of the driver. If so then update its info
1975 * if not in use. If it does not exist then find
1976 * the first free index and add it.
1977 */
1978 for (j = 0; j <= h->highest_lun; j++) {
1979 if (h->drv[j].raid_level != -1 &&
1980 h->drv[j].LunID == lunid) {
1981 drv_index = j;
1982 drv_found = 1;
1983 break;
ddd47442 1984 }
a72da29b 1985 }
ddd47442 1986
a72da29b
MM		 1987 /* check if the drive was found already in the array */
1988 if (!drv_found) {
eece695f 1989 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 1990 if (drv_index == -1)
1991 goto freeret;
a72da29b 1992 }
6ae5ce8e 1993 cciss_update_drive_info(ctlr, drv_index, first_time);
a72da29b 1994 } /* end for */
ddd47442 1995
6ae5ce8e 1996freeret:
ddd47442
MM		 1997 kfree(ld_buff);
1998 h->busy_configuring = 0;
1999 /* We return -1 here to tell the ACU that we have registered/updated
2000 * all of the drives that we can and to keep it from calling us
2001 * additional times.
7c832835 2002 */
ddd47442 2003 return -1;
6ae5ce8e 2004mem_msg:
ddd47442 2005 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2006 h->busy_configuring = 0;
ddd47442
MM		 2007 goto freeret;
2008}
2009
2010/* This function will deregister the disk and it's queue from the
2011 * kernel. It must be called with the controller lock held and the
2012 * drv structures busy_configuring flag set. It's parameters are:
2013 *
2014 * disk = This is the disk to be deregistered
2015 * drv = This is the drive_info_struct associated with the disk to be
2016 * deregistered. It contains information about the disk used
2017 * by the driver.
2018 * clear_all = This flag determines whether or not the disk information
2019 * is going to be completely cleared out and the highest_lun
2020 * reset. Sometimes we want to clear out information about
d14c4ab5 2021 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2022 * the highest_lun should be left unchanged and the LunID
2023 * should not be cleared.
2024*/
a0ea8622 2025static int deregister_disk(ctlr_info_t *h, int drv_index,
ddd47442
MM		 2026 int clear_all)
2027{
799202cb 2028 int i;
a0ea8622
SC		 2029 struct gendisk *disk;
2030 drive_info_struct *drv;
1da177e4
LT		 2031
2032 if (!capable(CAP_SYS_RAWIO))
2033 return -EPERM;
2034
a0ea8622
SC		 2035 drv = &h->drv[drv_index];
2036 disk = h->gendisk[drv_index];
2037
1da177e4 2038 /* make sure logical volume is NOT is use */
7c832835
BH		 2039 if (clear_all || (h->gendisk[0] == disk)) {
2040 if (drv->usage_count > 1)
2041 return -EBUSY;
2042 } else if (drv->usage_count > 0)
2043 return -EBUSY;
1da177e4 2044
ddd47442
MM		 2045 /* invalidate the devices and deregister the disk. If it is disk
2046 * zero do not deregister it but just zero out it's values. This
2047 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2048 */
2049 if (h->gendisk[0] != disk) {
5a9df732
AB		 2050 struct request_queue *q = disk->queue;
2051 if (disk->flags & GENHD_FL_UP)
2052 del_gendisk(disk);
2053 if (q) {
2054 blk_cleanup_queue(q);
2055 /* Set drv->queue to NULL so that we do not try
2056 * to call blk_start_queue on this queue in the
2057 * interrupt handler
2058 */
2059 drv->queue = NULL;
2060 }
2061 /* If clear_all is set then we are deleting the logical
2062 * drive, not just refreshing its info. For drives
2063 * other than disk 0 we will call put_disk. We do not
2064 * do this for disk 0 as we need it to be able to
2065 * configure the controller.
a72da29b 2066 */
5a9df732
AB		 2067 if (clear_all){
2068 /* This isn't pretty, but we need to find the
2069 * disk in our array and NULL our the pointer.
2070 * This is so that we will call alloc_disk if
2071 * this index is used again later.
a72da29b 2072 */
5a9df732 2073 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2074 if (h->gendisk[i] == disk) {
5a9df732
AB		 2075 h->gendisk[i] = NULL;
2076 break;
799202cb 2077 }
799202cb 2078 }
5a9df732 2079 put_disk(disk);
ddd47442 2080 }
799202cb
MM		 2081 } else {
2082 set_capacity(disk, 0);
ddd47442
MM		 2083 }
2084
2085 --h->num_luns;
2086 /* zero out the disk size info */
2087 drv->nr_blocks = 0;
2088 drv->block_size = 0;
2089 drv->heads = 0;
2090 drv->sectors = 0;
2091 drv->cylinders = 0;
2092 drv->raid_level = -1; /* This can be used as a flag variable to
2093 * indicate that this element of the drive
2094 * array is free.
7c832835
BH		 2095 */
2096
2097 if (clear_all) {
2098 /* check to see if it was the last disk */
2099 if (drv == h->drv + h->highest_lun) {
2100 /* if so, find the new hightest lun */
2101 int i, newhighest = -1;
a72da29b 2102 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2103 /* if the disk has size > 0, it is available */
ddd47442 2104 if (h->drv[i].heads)
7c832835
BH		 2105 newhighest = i;
2106 }
2107 h->highest_lun = newhighest;
1da177e4 2108 }
ddd47442 2109
7c832835 2110 drv->LunID = 0;
ddd47442 2111 }
e2019b58 2112 return 0;
1da177e4 2113}
ddd47442 2114
7c832835
BH		 2115static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num, /* 0: address the controller,
2116 1: address logical volume log_unit,
2117 2: periph device address is scsi3addr */
2118 unsigned int log_unit, __u8 page_code,
2119 unsigned char *scsi3addr, int cmd_type)
1da177e4 2120{
7c832835 2121 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2122 u64bit buff_dma_handle;
2123 int status = IO_OK;
2124
2125 c->cmd_type = CMD_IOCTL_PEND;
2126 c->Header.ReplyQueue = 0;
7c832835 2127 if (buff != NULL) {
1da177e4 2128 c->Header.SGList = 1;
7c832835 2129 c->Header.SGTotal = 1;
1da177e4
LT		 2130 } else {
2131 c->Header.SGList = 0;
7c832835 2132 c->Header.SGTotal = 0;
1da177e4
LT		 2133 }
2134 c->Header.Tag.lower = c->busaddr;
2135
2136 c->Request.Type.Type = cmd_type;
2137 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2138 switch (cmd) {
2139 case CISS_INQUIRY:
1da177e4 2140 /* If the logical unit number is 0 then, this is going
7c832835
BH		 2141 to controller so It's a physical command
2142 mode = 0 target = 0. So we have nothing to write.
2143 otherwise, if use_unit_num == 1,
2144 mode = 1(volume set addressing) target = LUNID
2145 otherwise, if use_unit_num == 2,
2146 mode = 0(periph dev addr) target = scsi3addr */
1da177e4 2147 if (use_unit_num == 1) {
7c832835
BH		 2148 c->Header.LUN.LogDev.VolId =
2149 h->drv[log_unit].LunID;
2150 c->Header.LUN.LogDev.Mode = 1;
1da177e4 2151 } else if (use_unit_num == 2) {
7c832835
BH		 2152 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr,
2153 8);
1da177e4
LT		 2154 c->Header.LUN.LogDev.Mode = 0;
2155 }
2156 /* are we trying to read a vital product page */
7c832835 2157 if (page_code != 0) {
1da177e4
LT		 2158 c->Request.CDB[1] = 0x01;
2159 c->Request.CDB[2] = page_code;
2160 }
2161 c->Request.CDBLen = 6;
7c832835 2162 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2163 c->Request.Type.Direction = XFER_READ;
2164 c->Request.Timeout = 0;
7c832835
BH		 2165 c->Request.CDB[0] = CISS_INQUIRY;
2166 c->Request.CDB[4] = size & 0xFF;
2167 break;
1da177e4
LT		 2168 case CISS_REPORT_LOG:
2169 case CISS_REPORT_PHYS:
7c832835 2170 /* Talking to controller so It's a physical command
1da177e4 2171 mode = 00 target = 0. Nothing to write.
7c832835 2172 */
1da177e4
LT		 2173 c->Request.CDBLen = 12;
2174 c->Request.Type.Attribute = ATTR_SIMPLE;
2175 c->Request.Type.Direction = XFER_READ;
2176 c->Request.Timeout = 0;
2177 c->Request.CDB[0] = cmd;
7c832835 2178 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2179 c->Request.CDB[7] = (size >> 16) & 0xFF;
2180 c->Request.CDB[8] = (size >> 8) & 0xFF;
2181 c->Request.CDB[9] = size & 0xFF;
2182 break;
2183
2184 case CCISS_READ_CAPACITY:
2185 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
2186 c->Header.LUN.LogDev.Mode = 1;
2187 c->Request.CDBLen = 10;
2188 c->Request.Type.Attribute = ATTR_SIMPLE;
2189 c->Request.Type.Direction = XFER_READ;
2190 c->Request.Timeout = 0;
2191 c->Request.CDB[0] = cmd;
7c832835 2192 break;
00988a35
MMOD		 2193 case CCISS_READ_CAPACITY_16:
2194 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
2195 c->Header.LUN.LogDev.Mode = 1;
2196 c->Request.CDBLen = 16;
2197 c->Request.Type.Attribute = ATTR_SIMPLE;
2198 c->Request.Type.Direction = XFER_READ;
2199 c->Request.Timeout = 0;
2200 c->Request.CDB[0] = cmd;
2201 c->Request.CDB[1] = 0x10;
2202 c->Request.CDB[10] = (size >> 24) & 0xFF;
2203 c->Request.CDB[11] = (size >> 16) & 0xFF;
2204 c->Request.CDB[12] = (size >> 8) & 0xFF;
2205 c->Request.CDB[13] = size & 0xFF;
2206 c->Request.Timeout = 0;
2207 c->Request.CDB[0] = cmd;
2208 break;
1da177e4
LT		 2209 case CCISS_CACHE_FLUSH:
2210 c->Request.CDBLen = 12;
2211 c->Request.Type.Attribute = ATTR_SIMPLE;
2212 c->Request.Type.Direction = XFER_WRITE;
2213 c->Request.Timeout = 0;
2214 c->Request.CDB[0] = BMIC_WRITE;
2215 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2216 break;
88f627ae
SC		 2217 case TEST_UNIT_READY:
2218 memcpy(c->Header. LUN.LunAddrBytes, scsi3addr, 8);
2219 c->Request.CDBLen = 6;
2220 c->Request.Type.Attribute = ATTR_SIMPLE;
2221 c->Request.Type.Direction = XFER_NONE;
2222 c->Request.Timeout = 0;
2223 break;
1da177e4
LT		 2224 default:
2225 printk(KERN_WARNING
7c832835 2226 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2227 return IO_ERROR;
1da177e4
LT		 2228 }
2229 } else if (cmd_type == TYPE_MSG) {
2230 switch (cmd) {
7c832835 2231 case 0: /* ABORT message */
3da8b713 2232 c->Request.CDBLen = 12;
2233 c->Request.Type.Attribute = ATTR_SIMPLE;
2234 c->Request.Type.Direction = XFER_WRITE;
2235 c->Request.Timeout = 0;
7c832835
BH		 2236 c->Request.CDB[0] = cmd; /* abort */
2237 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2238 /* buff contains the tag of the command to abort */
2239 memcpy(&c->Request.CDB[4], buff, 8);
2240 break;
7c832835 2241 case 1: /* RESET message */
88f627ae
SC		 2242 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2243 c->Request.CDBLen = 16;
3da8b713 2244 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2245 c->Request.Type.Direction = XFER_NONE;
3da8b713 2246 c->Request.Timeout = 0;
2247 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2248 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2249 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2250 break;
1da177e4
LT		 2251 case 3: /* No-Op message */
2252 c->Request.CDBLen = 1;
2253 c->Request.Type.Attribute = ATTR_SIMPLE;
2254 c->Request.Type.Direction = XFER_WRITE;
2255 c->Request.Timeout = 0;
2256 c->Request.CDB[0] = cmd;
2257 break;
2258 default:
2259 printk(KERN_WARNING
7c832835 2260 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2261 return IO_ERROR;
2262 }
2263 } else {
2264 printk(KERN_WARNING
7c832835 2265 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2266 return IO_ERROR;
2267 }
2268 /* Fill in the scatter gather information */
2269 if (size > 0) {
2270 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2271 buff, size,
2272 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2273 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2274 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2275 c->SG[0].Len = size;
7c832835 2276 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2277 }
2278 return status;
2279}
7c832835 2280
5390cfc3 2281static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2282{
5390cfc3 2283 DECLARE_COMPLETION_ONSTACK(wait);
7c832835 2284 u64bit buff_dma_handle;
1da177e4 2285 unsigned long flags;
5390cfc3 2286 int return_status = IO_OK;
7c832835 2287
5390cfc3 2288resend_cmd2:
1da177e4 2289 c->waiting = &wait;
1da177e4 2290 /* Put the request on the tail of the queue and send it */
5390cfc3 2291 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1da177e4
LT		 2292 addQ(&h->reqQ, c);
2293 h->Qdepth++;
2294 start_io(h);
5390cfc3 2295 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
7c832835 2296
1da177e4
LT		 2297 wait_for_completion(&wait);
2298
5390cfc3 2299 if (c->err_info->CommandStatus == 0)
2300 goto command_done;
2301
2302 switch (c->err_info->CommandStatus) {
2303 case CMD_TARGET_STATUS:
2304 printk(KERN_WARNING "cciss: cmd 0x%02x "
2305 "has completed with errors\n", c->Request.CDB[0]);
2306 if (c->err_info->ScsiStatus) {
2307 printk(KERN_WARNING "cciss: cmd 0x%02x "
2308 "has SCSI Status = %x\n",
2309 c->Request.CDB[0], c->err_info->ScsiStatus);
2310 }
2311 break;
2312 case CMD_DATA_UNDERRUN:
2313 case CMD_DATA_OVERRUN:
2314 /* expected for inquiry and report lun commands */
2315 break;
2316 case CMD_INVALID:
2317 printk(KERN_WARNING "cciss: Cmd 0x%02x is "
2318 "reported invalid\n", c->Request.CDB[0]);
2319 return_status = IO_ERROR;
2320 break;
2321 case CMD_PROTOCOL_ERR:
2322 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2323 "protocol error \n", c->Request.CDB[0]);
2324 return_status = IO_ERROR;
2325 break;
2326 case CMD_HARDWARE_ERR:
2327 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2328 " hardware error\n", c->Request.CDB[0]);
2329 return_status = IO_ERROR;
2330 break;
2331 case CMD_CONNECTION_LOST:
2332 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2333 "connection lost\n", c->Request.CDB[0]);
2334 return_status = IO_ERROR;
2335 break;
2336 case CMD_ABORTED:
2337 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2338 "aborted\n", c->Request.CDB[0]);
2339 return_status = IO_ERROR;
2340 break;
2341 case CMD_ABORT_FAILED:
2342 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2343 "abort failed\n", c->Request.CDB[0]);
2344 return_status = IO_ERROR;
2345 break;
2346 case CMD_UNSOLICITED_ABORT:
2347 printk(KERN_WARNING
2348 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2349 c->Request.CDB[0]);
2350 if (c->retry_count < MAX_CMD_RETRIES) {
7c832835 2351 printk(KERN_WARNING
5390cfc3 2352 "cciss%d: retrying 0x%02x\n", h->ctlr,
2353 c->Request.CDB[0]);
2354 c->retry_count++;
2355 /* erase the old error information */
2356 memset(c->err_info, 0,
2357 sizeof(ErrorInfo_struct));
2358 return_status = IO_OK;
2359 INIT_COMPLETION(wait);
2360 goto resend_cmd2;
1da177e4 2361 }
5390cfc3 2362 return_status = IO_ERROR;
2363 break;
2364 default:
2365 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2366 "unknown status %x\n", c->Request.CDB[0],
2367 c->err_info->CommandStatus);
2368 return_status = IO_ERROR;
7c832835 2369 }
5390cfc3 2370
2371command_done:
1da177e4 2372 /* unlock the buffers from DMA */
bb2a37bf
MM		 2373 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2374 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2375 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2376 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2377 return return_status;
2378}
2379
2380static int sendcmd_withirq(__u8 cmd,
2381 int ctlr,
2382 void *buff,
2383 size_t size,
2384 unsigned int use_unit_num,
2385 unsigned int log_unit, __u8 page_code, int cmd_type)
2386{
2387 ctlr_info_t *h = hba[ctlr];
2388 CommandList_struct *c;
2389 int return_status;
2390
2391 c = cmd_alloc(h, 0);
2392 if (!c)
2393 return -ENOMEM;
2394 return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
2395 log_unit, page_code, NULL, cmd_type);
2396 if (return_status == IO_OK)
2397 return_status = sendcmd_withirq_core(h, c);
1da177e4 2398 cmd_free(h, c, 0);
7c832835 2399 return return_status;
1da177e4 2400}
7c832835 2401
1da177e4 2402static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2403 int withirq, sector_t total_size,
7c832835
BH		 2404 unsigned int block_size,
2405 InquiryData_struct *inq_buff,
2406 drive_info_struct *drv)
1da177e4
LT		 2407{
2408 int return_code;
00988a35 2409 unsigned long t;
00988a35 2410
1da177e4
LT		 2411 memset(inq_buff, 0, sizeof(InquiryData_struct));
2412 if (withirq)
2413 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
7c832835
BH		 2414 inq_buff, sizeof(*inq_buff), 1,
2415 logvol, 0xC1, TYPE_CMD);
1da177e4
LT		 2416 else
2417 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
7c832835
BH		 2418 sizeof(*inq_buff), 1, logvol, 0xC1, NULL,
2419 TYPE_CMD);
1da177e4 2420 if (return_code == IO_OK) {
7c832835 2421 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2422 printk(KERN_WARNING
7c832835
BH		 2423 "cciss: reading geometry failed, volume "
2424 "does not support reading geometry\n");
1da177e4 2425 drv->heads = 255;
7c832835 2426 drv->sectors = 32; // Sectors per track
7f42d3b8 2427 drv->cylinders = total_size + 1;
89f97ad1 2428 drv->raid_level = RAID_UNKNOWN;
1da177e4 2429 } else {
1da177e4
LT		 2430 drv->heads = inq_buff->data_byte[6];
2431 drv->sectors = inq_buff->data_byte[7];
2432 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2433 drv->cylinders += inq_buff->data_byte[5];
2434 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2435 }
2436 drv->block_size = block_size;
97c06978 2437 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2438 t = drv->heads * drv->sectors;
2439 if (t > 1) {
97c06978
MMOD		 2440 sector_t real_size = total_size + 1;
2441 unsigned long rem = sector_div(real_size, t);
3f7705ea 2442 if (rem)
97c06978
MMOD		 2443 real_size++;
2444 drv->cylinders = real_size;
1da177e4 2445 }
7c832835 2446 } else { /* Get geometry failed */
1da177e4
LT		 2447 printk(KERN_WARNING "cciss: reading geometry failed\n");
2448 }
cc088d10 2449 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
7c832835 2450 drv->heads, drv->sectors, drv->cylinders);
1da177e4 2451}
7c832835 2452
1da177e4 2453static void
00988a35 2454cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2455 unsigned int *block_size)
1da177e4 2456{
00988a35 2457 ReadCapdata_struct *buf;
1da177e4 2458 int return_code;
1aebe187
MK		 2459
2460 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2461 if (!buf) {
00988a35
MMOD		 2462 printk(KERN_WARNING "cciss: out of memory\n");
2463 return;
2464 }
1aebe187 2465
1da177e4
LT		 2466 if (withirq)
2467 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35
MMOD		 2468 ctlr, buf, sizeof(ReadCapdata_struct),
2469 1, logvol, 0, TYPE_CMD);
1da177e4
LT		 2470 else
2471 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35
MMOD		 2472 ctlr, buf, sizeof(ReadCapdata_struct),
2473 1, logvol, 0, NULL, TYPE_CMD);
1da177e4 2474 if (return_code == IO_OK) {
4c1f2b31
AV		 2475 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2476 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2477 } else { /* read capacity command failed */
1da177e4
LT		 2478 printk(KERN_WARNING "cciss: read capacity failed\n");
2479 *total_size = 0;
2480 *block_size = BLOCK_SIZE;
2481 }
97c06978 2482 if (*total_size != 0)
7b92aadf 2483 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2484 (unsigned long long)*total_size+1, *block_size);
00988a35 2485 kfree(buf);
00988a35
MMOD		 2486}
2487
2488static void
2489cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2490{
2491 ReadCapdata_struct_16 *buf;
2492 int return_code;
1aebe187
MK		 2493
2494 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2495 if (!buf) {
00988a35
MMOD		 2496 printk(KERN_WARNING "cciss: out of memory\n");
2497 return;
2498 }
1aebe187 2499
00988a35
MMOD		 2500 if (withirq) {
2501 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2502 ctlr, buf, sizeof(ReadCapdata_struct_16),
2503 1, logvol, 0, TYPE_CMD);
2504 }
2505 else {
2506 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2507 ctlr, buf, sizeof(ReadCapdata_struct_16),
2508 1, logvol, 0, NULL, TYPE_CMD);
2509 }
2510 if (return_code == IO_OK) {
4c1f2b31
AV		 2511 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2512 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2513 } else { /* read capacity command failed */
2514 printk(KERN_WARNING "cciss: read capacity failed\n");
2515 *total_size = 0;
2516 *block_size = BLOCK_SIZE;
2517 }
7b92aadf 2518 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2519 (unsigned long long)*total_size+1, *block_size);
00988a35 2520 kfree(buf);
1da177e4
LT		 2521}
2522
1da177e4
LT		 2523static int cciss_revalidate(struct gendisk *disk)
2524{
2525 ctlr_info_t *h = get_host(disk);
2526 drive_info_struct *drv = get_drv(disk);
2527 int logvol;
7c832835 2528 int FOUND = 0;
1da177e4 2529 unsigned int block_size;
00988a35 2530 sector_t total_size;
1da177e4
LT		 2531 InquiryData_struct *inq_buff = NULL;
2532
7c832835
BH		 2533 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2534 if (h->drv[logvol].LunID == drv->LunID) {
2535 FOUND = 1;
1da177e4
LT		 2536 break;
2537 }
2538 }
2539
7c832835
BH		 2540 if (!FOUND)
2541 return 1;
1da177e4 2542
7c832835
BH		 2543 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2544 if (inq_buff == NULL) {
2545 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2546 return 1;
2547 }
00988a35
MMOD		 2548 if (h->cciss_read == CCISS_READ_10) {
2549 cciss_read_capacity(h->ctlr, logvol, 1,
2550 &total_size, &block_size);
2551 } else {
2552 cciss_read_capacity_16(h->ctlr, logvol, 1,
2553 &total_size, &block_size);
2554 }
7c832835
BH		 2555 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2556 inq_buff, drv);
1da177e4 2557
e1defc4f 2558 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2559 set_capacity(disk, drv->nr_blocks);
2560
1da177e4
LT		 2561 kfree(inq_buff);
2562 return 0;
2563}
2564
2565/*
2566 * Wait polling for a command to complete.
2567 * The memory mapped FIFO is polled for the completion.
2568 * Used only at init time, interrupts from the HBA are disabled.
2569 */
2570static unsigned long pollcomplete(int ctlr)
2571{
2572 unsigned long done;
2573 int i;
2574
2575 /* Wait (up to 20 seconds) for a command to complete */
2576
2577 for (i = 20 * HZ; i > 0; i--) {
2578 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2579 if (done == FIFO_EMPTY)
2580 schedule_timeout_uninterruptible(1);
2581 else
e2019b58 2582 return done;
1da177e4
LT		 2583 }
2584 /* Invalid address to tell caller we ran out of time */
2585 return 1;
2586}
3da8b713 2587
2588static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
2589{
2590 /* We get in here if sendcmd() is polling for completions
7c832835
BH		 2591 and gets some command back that it wasn't expecting --
2592 something other than that which it just sent down.
2593 Ordinarily, that shouldn't happen, but it can happen when
3da8b713 2594 the scsi tape stuff gets into error handling mode, and
7c832835 2595 starts using sendcmd() to try to abort commands and
3da8b713 2596 reset tape drives. In that case, sendcmd may pick up
2597 completions of commands that were sent to logical drives
7c832835 2598 through the block i/o system, or cciss ioctls completing, etc.
3da8b713 2599 In that case, we need to save those completions for later
2600 processing by the interrupt handler.
7c832835 2601 */
3da8b713 2602
2603#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 2604 struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
3da8b713 2605
2606 /* If it's not the scsi tape stuff doing error handling, (abort */
2607 /* or reset) then we don't expect anything weird. */
2608 if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
2609#endif
7c832835
BH		 2610 printk(KERN_WARNING "cciss cciss%d: SendCmd "
2611 "Invalid command list address returned! (%lx)\n",
2612 ctlr, complete);
3da8b713 2613 /* not much we can do. */
2614#ifdef CONFIG_CISS_SCSI_TAPE
2615 return 1;
2616 }
2617
2618 /* We've sent down an abort or reset, but something else
2619 has completed */
f880632f 2620 if (srl->ncompletions >= (hba[ctlr]->nr_cmds + 2)) {
3da8b713 2621 /* Uh oh. No room to save it for later... */
2622 printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
7c832835 2623 "reject list overflow, command lost!\n", ctlr);
3da8b713 2624 return 1;
2625 }
2626 /* Save it for later */
2627 srl->complete[srl->ncompletions] = complete;
2628 srl->ncompletions++;
2629#endif
2630 return 0;
2631}
2632
4a4b2d76
SC		 2633/* Send command c to controller h and poll for it to complete.
2634 * Turns interrupts off on the board. Used at driver init time
2635 * and during SCSI error recovery.
1da177e4 2636 */
4a4b2d76 2637static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2638{
1da177e4
LT		 2639 int i;
2640 unsigned long complete;
4a4b2d76 2641 int status = IO_ERROR;
1da177e4 2642 u64bit buff_dma_handle;
1da177e4 2643
4a4b2d76
SC		 2644resend_cmd1:
2645
2646 /* Disable interrupt on the board. */
2647 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2648
1da177e4 2649 /* Make sure there is room in the command FIFO */
7c832835 2650 /* Actually it should be completely empty at this time */
3da8b713 2651 /* unless we are in here doing error handling for the scsi */
2652 /* tape side of the driver. */
7c832835 2653 for (i = 200000; i > 0; i--) {
1da177e4 2654 /* if fifo isn't full go */
4a4b2d76 2655 if (!(h->access.fifo_full(h)))
7c832835 2656 break;
7c832835
BH		 2657 udelay(10);
2658 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2659 " waiting!\n", h->ctlr);
7c832835 2660 }
4a4b2d76 2661 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2662 do {
4a4b2d76 2663 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2664
2665#ifdef CCISS_DEBUG
3da8b713 2666 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2667#endif /* CCISS_DEBUG */
1da177e4 2668
3da8b713 2669 if (complete == 1) {
7c832835
BH		 2670 printk(KERN_WARNING
2671 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2672 "No command list address returned!\n", h->ctlr);
3da8b713 2673 status = IO_ERROR;
3da8b713 2674 break;
2675 }
2676
4a4b2d76
SC		 2677 /* If it's not the cmd we're looking for, save it for later */
2678 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
2679 if (add_sendcmd_reject(c->Request.CDB[0],
2680 h->ctlr, complete) != 0)
2681 BUG(); /* we are hosed if we get here. */
2682 continue;
2683 }
2684
2685 /* It is our command. If no error, we're done. */
2686 if (!(complete & CISS_ERROR_BIT)) {
2687 status = IO_OK;
2688 break;
2689 }
2690
2691 /* There is an error... */
2692
2693 /* if data overrun or underun on Report command ignore it */
2694 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2695 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2696 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2697 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2698 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2699 complete = c->busaddr;
2700 status = IO_OK;
2701 break;
1da177e4 2702 }
4a4b2d76
SC		 2703
2704 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2705 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2706 h->ctlr, c);
2707 if (c->retry_count < MAX_CMD_RETRIES) {
2708 printk(KERN_WARNING "cciss%d: retrying %p\n",
2709 h->ctlr, c);
2710 c->retry_count++;
2711 /* erase the old error information */
2712 memset(c->err_info, 0, sizeof(c->err_info));
2713 goto resend_cmd1;
3da8b713 2714 }
4a4b2d76
SC		 2715 printk(KERN_WARNING "cciss%d: retried %p too many "
2716 "times\n", h->ctlr, c);
2717 status = IO_ERROR;
2718 goto cleanup1;
2719 }
2720
2721 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2722 printk(KERN_WARNING "cciss%d: command could not be "
2723 "aborted.\n", h->ctlr);
2724 status = IO_ERROR;
2725 goto cleanup1;
2726 }
2727
2728 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2729 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2730 c->Request.CDB[0], c->err_info->CommandStatus);
2731 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
2732 printk(KERN_WARNING "Target status = 0x%02x\n",
2733 c->err_info->ScsiStatus);
2734 if (c->err_info->ScsiStatus == 2) /* chk cond */
2735 printk(KERN_WARNING "Sense key = 0x%02x\n",
2736 0xf & c->err_info->SenseInfo[2]);
2737 }
2738
2739 status = IO_ERROR;
2740 goto cleanup1;
2741
2742 } while (1);
7c832835 2743
4a4b2d76 2744cleanup1:
1da177e4 2745 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2746 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2747 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2748 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2749 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
3da8b713 2750#ifdef CONFIG_CISS_SCSI_TAPE
2751 /* if we saved some commands for later, process them now. */
4a4b2d76
SC		 2752 if (h->scsi_rejects.ncompletions > 0)
2753 do_cciss_intr(0, h);
3da8b713 2754#endif
4a4b2d76
SC		 2755 return status;
2756}
2757
2758/*
2759 * Send a command to the controller, and wait for it to complete.
2760 * Used at init time, and during SCSI error recovery.
2761 */
2762static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
2763 unsigned int use_unit_num,/* 0: address the controller,
2764 1: address logical volume log_unit,
2765 2: periph device address is scsi3addr */
2766 unsigned int log_unit,
2767 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2768{
2769 CommandList_struct *c;
2770 int status;
2771
2772 c = cmd_alloc(hba[ctlr], 1);
2773 if (!c) {
2774 printk(KERN_WARNING "cciss: unable to get memory");
2775 return IO_ERROR;
2776 }
2777 status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
2778 log_unit, page_code, scsi3addr, cmd_type);
2779 if (status == IO_OK)
2780 status = sendcmd_core(hba[ctlr], c);
2781 cmd_free(hba[ctlr], c, 1);
e2019b58 2782 return status;
7c832835
BH		 2783}
2784
1da177e4
LT		 2785/*
2786 * Map (physical) PCI mem into (virtual) kernel space
2787 */
2788static void __iomem *remap_pci_mem(ulong base, ulong size)
2789{
7c832835
BH		 2790 ulong page_base = ((ulong) base) & PAGE_MASK;
2791 ulong page_offs = ((ulong) base) - page_base;
2792 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2793
7c832835 2794 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2795}
2796
7c832835
BH		 2797/*
2798 * Takes jobs of the Q and sends them to the hardware, then puts it on
2799 * the Q to wait for completion.
2800 */
2801static void start_io(ctlr_info_t *h)
1da177e4
LT		 2802{
2803 CommandList_struct *c;
7c832835 2804
8a3173de
JA		 2805 while (!hlist_empty(&h->reqQ)) {
2806 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2807 /* can't do anything if fifo is full */
2808 if ((h->access.fifo_full(h))) {
2809 printk(KERN_WARNING "cciss: fifo full\n");
2810 break;
2811 }
2812
7c832835 2813 /* Get the first entry from the Request Q */
8a3173de 2814 removeQ(c);
1da177e4 2815 h->Qdepth--;
7c832835
BH		 2816
2817 /* Tell the controller execute command */
1da177e4 2818 h->access.submit_command(h, c);
7c832835
BH		 2819
2820 /* Put job onto the completed Q */
8a3173de 2821 addQ(&h->cmpQ, c);
1da177e4
LT		 2822 }
2823}
7c832835 2824
1da177e4
LT		 2825/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2826/* Zeros out the error record and then resends the command back */
2827/* to the controller */
7c832835 2828static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2829{
2830 /* erase the old error information */
2831 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2832
2833 /* add it to software queue and then send it to the controller */
8a3173de 2834 addQ(&h->reqQ, c);
1da177e4 2835 h->Qdepth++;
7c832835 2836 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2837 h->maxQsinceinit = h->Qdepth;
2838
2839 start_io(h);
2840}
a9925a06 2841
1a614f50
SC		 2842static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2843 unsigned int msg_byte, unsigned int host_byte,
2844 unsigned int driver_byte)
2845{
2846 /* inverse of macros in scsi.h */
2847 return (scsi_status_byte & 0xff) |
2848 ((msg_byte & 0xff) << 8) |
2849 ((host_byte & 0xff) << 16) |
2850 ((driver_byte & 0xff) << 24);
2851}
2852
0a9279cc
MM		 2853static inline int evaluate_target_status(ctlr_info_t *h,
2854 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2855{
2856 unsigned char sense_key;
1a614f50
SC		 2857 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2858 int error_value;
2859
0a9279cc 2860 *retry_cmd = 0;
1a614f50
SC		 2861 /* If we get in here, it means we got "target status", that is, scsi status */
2862 status_byte = cmd->err_info->ScsiStatus;
2863 driver_byte = DRIVER_OK;
2864 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2865
2866 if (blk_pc_request(cmd->rq))
2867 host_byte = DID_PASSTHROUGH;
2868 else
2869 host_byte = DID_OK;
2870
2871 error_value = make_status_bytes(status_byte, msg_byte,
2872 host_byte, driver_byte);
03bbfee5 2873
1a614f50 2874 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2875 if (!blk_pc_request(cmd->rq))
2876 printk(KERN_WARNING "cciss: cmd %p "
2877 "has SCSI Status 0x%x\n",
2878 cmd, cmd->err_info->ScsiStatus);
1a614f50 2879 return error_value;
03bbfee5
MMOD		 2880 }
2881
2882 /* check the sense key */
2883 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2884 /* no status or recovered error */
1a614f50
SC		 2885 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2886 error_value = 0;
03bbfee5 2887
0a9279cc
MM		 2888 if (check_for_unit_attention(h, cmd)) {
2889 *retry_cmd = !blk_pc_request(cmd->rq);
2890 return 0;
2891 }
2892
03bbfee5 2893 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2894 if (error_value != 0)
03bbfee5
MMOD		 2895 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2896 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2897 return error_value;
03bbfee5
MMOD		 2898 }
2899
2900 /* SG_IO or similar, copy sense data back */
2901 if (cmd->rq->sense) {
2902 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2903 cmd->rq->sense_len = cmd->err_info->SenseLen;
2904 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2905 cmd->rq->sense_len);
2906 } else
2907 cmd->rq->sense_len = 0;
2908
1a614f50 2909 return error_value;
03bbfee5
MMOD		 2910}
2911
7c832835 2912/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 2913 * buffers for the completed job. Note that this function does not need
2914 * to hold the hba/queue lock.
7c832835
BH		 2915 */
2916static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2917 int timeout)
1da177e4 2918{
1da177e4 2919 int retry_cmd = 0;
198b7660
MMOD		 2920 struct request *rq = cmd->rq;
2921
2922 rq->errors = 0;
7c832835 2923
1da177e4 2924 if (timeout)
1a614f50 2925 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 2926
d38ae168
MMOD		 2927 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2928 goto after_error_processing;
7c832835 2929
d38ae168 2930 switch (cmd->err_info->CommandStatus) {
d38ae168 2931 case CMD_TARGET_STATUS:
0a9279cc 2932 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 2933 break;
2934 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 2935 if (blk_fs_request(cmd->rq)) {
2936 printk(KERN_WARNING "cciss: cmd %p has"
2937 " completed with data underrun "
2938 "reported\n", cmd);
c3a4d78c 2939 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 2940 }
d38ae168
MMOD		 2941 break;
2942 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 2943 if (blk_fs_request(cmd->rq))
2944 printk(KERN_WARNING "cciss: cmd %p has"
2945 " completed with data overrun "
2946 "reported\n", cmd);
d38ae168
MMOD		 2947 break;
2948 case CMD_INVALID:
2949 printk(KERN_WARNING "cciss: cmd %p is "
2950 "reported invalid\n", cmd);
1a614f50
SC		 2951 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2952 cmd->err_info->CommandStatus, DRIVER_OK,
2953 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2954 break;
2955 case CMD_PROTOCOL_ERR:
2956 printk(KERN_WARNING "cciss: cmd %p has "
2957 "protocol error \n", cmd);
1a614f50
SC		 2958 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2959 cmd->err_info->CommandStatus, DRIVER_OK,
2960 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2961 break;
2962 case CMD_HARDWARE_ERR:
2963 printk(KERN_WARNING "cciss: cmd %p had "
2964 " hardware error\n", cmd);
1a614f50
SC		 2965 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2966 cmd->err_info->CommandStatus, DRIVER_OK,
2967 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2968 break;
2969 case CMD_CONNECTION_LOST:
2970 printk(KERN_WARNING "cciss: cmd %p had "
2971 "connection lost\n", cmd);
1a614f50
SC		 2972 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2973 cmd->err_info->CommandStatus, DRIVER_OK,
2974 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2975 break;
2976 case CMD_ABORTED:
2977 printk(KERN_WARNING "cciss: cmd %p was "
2978 "aborted\n", cmd);
1a614f50
SC		 2979 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2980 cmd->err_info->CommandStatus, DRIVER_OK,
2981 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 2982 break;
2983 case CMD_ABORT_FAILED:
2984 printk(KERN_WARNING "cciss: cmd %p reports "
2985 "abort failed\n", cmd);
1a614f50
SC		 2986 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2987 cmd->err_info->CommandStatus, DRIVER_OK,
2988 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2989 break;
2990 case CMD_UNSOLICITED_ABORT:
2991 printk(KERN_WARNING "cciss%d: unsolicited "
2992 "abort %p\n", h->ctlr, cmd);
2993 if (cmd->retry_count < MAX_CMD_RETRIES) {
2994 retry_cmd = 1;
2995 printk(KERN_WARNING
2996 "cciss%d: retrying %p\n", h->ctlr, cmd);
2997 cmd->retry_count++;
2998 } else
2999 printk(KERN_WARNING
3000 "cciss%d: %p retried too "
3001 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3002 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3003 cmd->err_info->CommandStatus, DRIVER_OK,
3004 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3005 break;
3006 case CMD_TIMEOUT:
3007 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3008 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3009 cmd->err_info->CommandStatus, DRIVER_OK,
3010 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3011 break;
3012 default:
3013 printk(KERN_WARNING "cciss: cmd %p returned "
3014 "unknown status %x\n", cmd,
3015 cmd->err_info->CommandStatus);
1a614f50
SC		 3016 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3017 cmd->err_info->CommandStatus, DRIVER_OK,
3018 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3019 }
d38ae168
MMOD		 3020
3021after_error_processing:
3022
1da177e4 3023 /* We need to return this command */
7c832835
BH		 3024 if (retry_cmd) {
3025 resend_cciss_cmd(h, cmd);
1da177e4 3026 return;
7c832835 3027 }
03bbfee5 3028 cmd->rq->completion_data = cmd;
a9925a06 3029 blk_complete_request(cmd->rq);
1da177e4
LT		 3030}
3031
7c832835
BH		 3032/*
3033 * Get a request and submit it to the controller.
1da177e4 3034 */
165125e1 3035static void do_cciss_request(struct request_queue *q)
1da177e4 3036{
7c832835 3037 ctlr_info_t *h = q->queuedata;
1da177e4 3038 CommandList_struct *c;
00988a35
MMOD		 3039 sector_t start_blk;
3040 int seg;
1da177e4
LT		 3041 struct request *creq;
3042 u64bit temp64;
3043 struct scatterlist tmp_sg[MAXSGENTRIES];
3044 drive_info_struct *drv;
3045 int i, dir;
3046
3047 /* We call start_io here in case there is a command waiting on the
3048 * queue that has not been sent.
7c832835 3049 */
1da177e4
LT		 3050 if (blk_queue_plugged(q))
3051 goto startio;
3052
7c832835 3053 queue:
9934c8c0 3054 creq = blk_peek_request(q);
1da177e4
LT		 3055 if (!creq)
3056 goto startio;
3057
089fe1b2 3058 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3059
7c832835 3060 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3061 goto full;
3062
9934c8c0 3063 blk_start_request(creq);
1da177e4
LT		 3064
3065 spin_unlock_irq(q->queue_lock);
3066
3067 c->cmd_type = CMD_RWREQ;
3068 c->rq = creq;
7c832835
BH		 3069
3070 /* fill in the request */
1da177e4 3071 drv = creq->rq_disk->private_data;
7c832835 3072 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3073 /* got command from pool, so use the command block index instead */
3074 /* for direct lookups. */
3075 /* The first 2 bits are reserved for controller error reporting. */
3076 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835
BH		 3077 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
3078 c->Header.LUN.LogDev.VolId = drv->LunID;
1da177e4 3079 c->Header.LUN.LogDev.Mode = 1;
7c832835
BH		 3080 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3081 c->Request.Type.Type = TYPE_CMD; // It is a command.
3082 c->Request.Type.Attribute = ATTR_SIMPLE;
3083 c->Request.Type.Direction =
a52de245 3084 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3085 c->Request.Timeout = 0; // Don't time out
3086 c->Request.CDB[0] =
00988a35 3087 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3088 start_blk = blk_rq_pos(creq);
1da177e4 3089#ifdef CCISS_DEBUG
83096ebf
TH		 3090 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3091 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3092#endif /* CCISS_DEBUG */
1da177e4 3093
45711f1a 3094 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3095 seg = blk_rq_map_sg(q, creq, tmp_sg);
3096
7c832835 3097 /* get the DMA records for the setup */
1da177e4
LT		 3098 if (c->Request.Type.Direction == XFER_READ)
3099 dir = PCI_DMA_FROMDEVICE;
3100 else
3101 dir = PCI_DMA_TODEVICE;
3102
7c832835 3103 for (i = 0; i < seg; i++) {
1da177e4 3104 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3105 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3106 tmp_sg[i].offset,
3107 tmp_sg[i].length, dir);
1da177e4 3108 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3109 c->SG[i].Addr.upper = temp64.val32.upper;
3110 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3111 }
7c832835
BH		 3112 /* track how many SG entries we are using */
3113 if (seg > h->maxSG)
3114 h->maxSG = seg;
1da177e4
LT		 3115
3116#ifdef CCISS_DEBUG
83096ebf
TH		 3117 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3118 blk_rq_sectors(creq), seg);
7c832835 3119#endif /* CCISS_DEBUG */
1da177e4
LT		 3120
3121 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3122 if (likely(blk_fs_request(creq))) {
3123 if(h->cciss_read == CCISS_READ_10) {
3124 c->Request.CDB[1] = 0;
3125 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3126 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3127 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3128 c->Request.CDB[5] = start_blk & 0xff;
3129 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3130 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3131 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3132 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3133 } else {
582539e5
RD		 3134 u32 upper32 = upper_32_bits(start_blk);
3135
03bbfee5
MMOD		 3136 c->Request.CDBLen = 16;
3137 c->Request.CDB[1]= 0;
582539e5
RD		 3138 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3139 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3140 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3141 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3142 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3143 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3144 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3145 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3146 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3147 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3148 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3149 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3150 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3151 }
3152 } else if (blk_pc_request(creq)) {
3153 c->Request.CDBLen = creq->cmd_len;
3154 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3155 } else {
03bbfee5
MMOD		 3156 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3157 BUG();
00988a35 3158 }
1da177e4
LT		 3159
3160 spin_lock_irq(q->queue_lock);
3161
8a3173de 3162 addQ(&h->reqQ, c);
1da177e4 3163 h->Qdepth++;
7c832835
BH		 3164 if (h->Qdepth > h->maxQsinceinit)
3165 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3166
3167 goto queue;
00988a35 3168full:
1da177e4 3169 blk_stop_queue(q);
00988a35 3170startio:
1da177e4
LT		 3171 /* We will already have the driver lock here so not need
3172 * to lock it.
7c832835 3173 */
1da177e4
LT		 3174 start_io(h);
3175}
3176
3da8b713 3177static inline unsigned long get_next_completion(ctlr_info_t *h)
3178{
3179#ifdef CONFIG_CISS_SCSI_TAPE
3180 /* Any rejects from sendcmd() lying around? Process them first */
3181 if (h->scsi_rejects.ncompletions == 0)
3182 return h->access.command_completed(h);
3183 else {
3184 struct sendcmd_reject_list *srl;
3185 int n;
3186 srl = &h->scsi_rejects;
3187 n = --srl->ncompletions;
3188 /* printk("cciss%d: processing saved reject\n", h->ctlr); */
3189 printk("p");
3190 return srl->complete[n];
3191 }
3192#else
3193 return h->access.command_completed(h);
3194#endif
3195}
3196
3197static inline int interrupt_pending(ctlr_info_t *h)
3198{
3199#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 3200 return (h->access.intr_pending(h)
3da8b713 3201 || (h->scsi_rejects.ncompletions > 0));
3202#else
3203 return h->access.intr_pending(h);
3204#endif
3205}
3206
3207static inline long interrupt_not_for_us(ctlr_info_t *h)
3208{
3209#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 3210 return (((h->access.intr_pending(h) == 0) ||
3211 (h->interrupts_enabled == 0))
3212 && (h->scsi_rejects.ncompletions == 0));
3da8b713 3213#else
7c832835 3214 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3215 (h->interrupts_enabled == 0)));
3216#endif
3217}
3218
7d12e780 3219static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3220{
3221 ctlr_info_t *h = dev_id;
3222 CommandList_struct *c;
3223 unsigned long flags;
33079b21 3224 __u32 a, a1, a2;
1da177e4 3225
3da8b713 3226 if (interrupt_not_for_us(h))
1da177e4 3227 return IRQ_NONE;
1da177e4
LT		 3228 /*
3229 * If there are completed commands in the completion queue,
3230 * we had better do something about it.
3231 */
3232 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3233 while (interrupt_pending(h)) {
7c832835 3234 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3235 a1 = a;
33079b21
MM		 3236 if ((a & 0x04)) {
3237 a2 = (a >> 3);
f880632f 3238 if (a2 >= h->nr_cmds) {
7c832835
BH		 3239 printk(KERN_WARNING
3240 "cciss: controller cciss%d failed, stopping.\n",
3241 h->ctlr);
33079b21
MM		 3242 fail_all_cmds(h->ctlr);
3243 return IRQ_HANDLED;
3244 }
3245
3246 c = h->cmd_pool + a2;
3247 a = c->busaddr;
3248
3249 } else {
8a3173de
JA		 3250 struct hlist_node *tmp;
3251
7c832835 3252 a &= ~3;
8a3173de
JA		 3253 c = NULL;
3254 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3255 if (c->busaddr == a)
7c832835
BH		 3256 break;
3257 }
33079b21 3258 }
1da177e4
LT		 3259 /*
3260 * If we've found the command, take it off the
3261 * completion Q and free it
3262 */
8a3173de
JA		 3263 if (c && c->busaddr == a) {
3264 removeQ(c);
1da177e4
LT		 3265 if (c->cmd_type == CMD_RWREQ) {
3266 complete_command(h, c, 0);
3267 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3268 complete(c->waiting);
3269 }
3270# ifdef CONFIG_CISS_SCSI_TAPE
3271 else if (c->cmd_type == CMD_SCSI)
3272 complete_scsi_command(c, 0, a1);
3273# endif
3274 continue;
3275 }
3276 }
3277 }
3278
1da177e4
LT		 3279 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3280 return IRQ_HANDLED;
3281}
7c832835 3282
0a9279cc
MM		 3283static int scan_thread(void *data)
3284{
3285 ctlr_info_t *h = data;
3286 int rc;
3287 DECLARE_COMPLETION_ONSTACK(wait);
3288 h->rescan_wait = &wait;
3289
3290 for (;;) {
3291 rc = wait_for_completion_interruptible(&wait);
3292 if (kthread_should_stop())
3293 break;
3294 if (!rc)
3295 rebuild_lun_table(h, 0);
3296 }
3297 return 0;
3298}
3299
3300static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3301{
3302 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3303 return 0;
3304
3305 switch (c->err_info->SenseInfo[12]) {
3306 case STATE_CHANGED:
3307 printk(KERN_WARNING "cciss%d: a state change "
3308 "detected, command retried\n", h->ctlr);
3309 return 1;
3310 break;
3311 case LUN_FAILED:
3312 printk(KERN_WARNING "cciss%d: LUN failure "
3313 "detected, action required\n", h->ctlr);
3314 return 1;
3315 break;
3316 case REPORT_LUNS_CHANGED:
3317 printk(KERN_WARNING "cciss%d: report LUN data "
3318 "changed\n", h->ctlr);
3319 if (h->rescan_wait)
3320 complete(h->rescan_wait);
3321 return 1;
3322 break;
3323 case POWER_OR_RESET:
3324 printk(KERN_WARNING "cciss%d: a power on "
3325 "or device reset detected\n", h->ctlr);
3326 return 1;
3327 break;
3328 case UNIT_ATTENTION_CLEARED:
3329 printk(KERN_WARNING "cciss%d: unit attention "
3330 "cleared by another initiator\n", h->ctlr);
3331 return 1;
3332 break;
3333 default:
3334 printk(KERN_WARNING "cciss%d: unknown "
3335 "unit attention detected\n", h->ctlr);
3336 return 1;
3337 }
3338}
3339
7c832835 3340/*
d14c4ab5 3341 * We cannot read the structure directly, for portability we must use
1da177e4 3342 * the io functions.
7c832835 3343 * This is for debug only.
1da177e4
LT		 3344 */
3345#ifdef CCISS_DEBUG
7c832835 3346static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3347{
3348 int i;
3349 char temp_name[17];
3350
3351 printk("Controller Configuration information\n");
3352 printk("------------------------------------\n");
7c832835 3353 for (i = 0; i < 4; i++)
1da177e4 3354 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3355 temp_name[4] = '\0';
3356 printk(" Signature = %s\n", temp_name);
1da177e4 3357 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3358 printk(" Transport methods supported = 0x%x\n",
3359 readl(&(tb->TransportSupport)));
3360 printk(" Transport methods active = 0x%x\n",
3361 readl(&(tb->TransportActive)));
3362 printk(" Requested transport Method = 0x%x\n",
3363 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3364 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3365 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3366 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3367 readl(&(tb->HostWrite.CoalIntCount)));
3368 printk(" Max outstanding commands = 0x%d\n",
3369 readl(&(tb->CmdsOutMax)));
3370 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3371 for (i = 0; i < 16; i++)
1da177e4
LT		 3372 temp_name[i] = readb(&(tb->ServerName[i]));
3373 temp_name[16] = '\0';
3374 printk(" Server Name = %s\n", temp_name);
7c832835 3375 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3376}
7c832835 3377#endif /* CCISS_DEBUG */
1da177e4 3378
7c832835 3379static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3380{
3381 int i, offset, mem_type, bar_type;
7c832835 3382 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3383 return 0;
3384 offset = 0;
7c832835
BH		 3385 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3386 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3387 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3388 offset += 4;
3389 else {
3390 mem_type = pci_resource_flags(pdev, i) &
7c832835 3391 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3392 switch (mem_type) {
7c832835
BH		 3393 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3394 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3395 offset += 4; /* 32 bit */
3396 break;
3397 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3398 offset += 8;
3399 break;
3400 default: /* reserved in PCI 2.2 */
3401 printk(KERN_WARNING
3402 "Base address is invalid\n");
3403 return -1;
1da177e4
LT		 3404 break;
3405 }
3406 }
7c832835
BH		 3407 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3408 return i + 1;
1da177e4
LT		 3409 }
3410 return -1;
3411}
3412
fb86a35b
MM		 3413/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3414 * controllers that are capable. If not, we use IO-APIC mode.
3415 */
3416
7c832835
BH		 3417static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3418 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3419{
3420#ifdef CONFIG_PCI_MSI
7c832835
BH		 3421 int err;
3422 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3423 {0, 2}, {0, 3}
3424 };
fb86a35b
MM		 3425
3426 /* Some boards advertise MSI but don't really support it */
3427 if ((board_id == 0x40700E11) ||
7c832835
BH		 3428 (board_id == 0x40800E11) ||
3429 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3430 goto default_int_mode;
3431
7c832835
BH		 3432 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3433 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3434 if (!err) {
3435 c->intr[0] = cciss_msix_entries[0].vector;
3436 c->intr[1] = cciss_msix_entries[1].vector;
3437 c->intr[2] = cciss_msix_entries[2].vector;
3438 c->intr[3] = cciss_msix_entries[3].vector;
3439 c->msix_vector = 1;
3440 return;
3441 }
3442 if (err > 0) {
3443 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3444 "available\n", err);
1ecb9c0f 3445 goto default_int_mode;
7c832835
BH		 3446 } else {
3447 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3448 err);
1ecb9c0f 3449 goto default_int_mode;
7c832835
BH		 3450 }
3451 }
3452 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3453 if (!pci_enable_msi(pdev)) {
7c832835 3454 c->msi_vector = 1;
7c832835
BH		 3455 } else {
3456 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3457 }
3458 }
1ecb9c0f 3459default_int_mode:
7c832835 3460#endif /* CONFIG_PCI_MSI */
fb86a35b 3461 /* if we get here we're going to use the default interrupt mode */
7c832835 3462 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3463 return;
3464}
3465
7d1fd970 3466static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3467{
3468 ushort subsystem_vendor_id, subsystem_device_id, command;
3469 __u32 board_id, scratchpad = 0;
3470 __u64 cfg_offset;
3471 __u32 cfg_base_addr;
3472 __u64 cfg_base_addr_index;
c33ac89b 3473 int i, err;
1da177e4
LT		 3474
3475 /* check to see if controller has been disabled */
3476 /* BEFORE trying to enable it */
7c832835
BH		 3477 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3478 if (!(command & 0x02)) {
3479 printk(KERN_WARNING
3480 "cciss: controller appears to be disabled\n");
c33ac89b 3481 return -ENODEV;
1da177e4
LT		 3482 }
3483
c33ac89b 3484 err = pci_enable_device(pdev);
7c832835 3485 if (err) {
1da177e4 3486 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3487 return err;
1da177e4 3488 }
1da177e4 3489
4e570309
BH		 3490 err = pci_request_regions(pdev, "cciss");
3491 if (err) {
3492 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3493 "aborting\n");
872225ca 3494 return err;
4e570309
BH		 3495 }
3496
1da177e4
LT		 3497 subsystem_vendor_id = pdev->subsystem_vendor;
3498 subsystem_device_id = pdev->subsystem_device;
3499 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3500 subsystem_vendor_id);
1da177e4 3501
1da177e4
LT		 3502#ifdef CCISS_DEBUG
3503 printk("command = %x\n", command);
3504 printk("irq = %x\n", pdev->irq);
3505 printk("board_id = %x\n", board_id);
7c832835 3506#endif /* CCISS_DEBUG */
1da177e4 3507
fb86a35b
MM		 3508/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3509 * else we use the IO-APIC interrupt assigned to us by system ROM.
3510 */
3511 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3512
e1438581
MM		 3513 /* find the memory BAR */
3514 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3515 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3516 break;
3517 }
3518 if (i == DEVICE_COUNT_RESOURCE) {
3519 printk(KERN_WARNING "cciss: No memory BAR found\n");
3520 err = -ENODEV;
3521 goto err_out_free_res;
3522 }
3523
3524 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3525 * already removed
3526 */
1da177e4 3527
1da177e4 3528#ifdef CCISS_DEBUG
9f92f471 3529 printk("address 0 = %lx\n", c->paddr);
7c832835 3530#endif /* CCISS_DEBUG */
a5b92873 3531 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3532
3533 /* Wait for the board to become ready. (PCI hotplug needs this.)
3534 * We poll for up to 120 secs, once per 100ms. */
7c832835 3535 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3536 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3537 if (scratchpad == CCISS_FIRMWARE_READY)
3538 break;
3539 set_current_state(TASK_INTERRUPTIBLE);
7c832835 3540 schedule_timeout(HZ / 10); /* wait 100ms */
1da177e4
LT		 3541 }
3542 if (scratchpad != CCISS_FIRMWARE_READY) {
3543 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3544 err = -ENODEV;
4e570309 3545 goto err_out_free_res;
1da177e4
LT		 3546 }
3547
3548 /* get the address index number */
3549 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3550 cfg_base_addr &= (__u32) 0x0000ffff;
3551#ifdef CCISS_DEBUG
3552 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3553#endif /* CCISS_DEBUG */
3554 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3555#ifdef CCISS_DEBUG
9f92f471
RD		 3556 printk("cfg base address index = %llx\n",
3557 (unsigned long long)cfg_base_addr_index);
7c832835 3558#endif /* CCISS_DEBUG */
1da177e4
LT		 3559 if (cfg_base_addr_index == -1) {
3560 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3561 err = -ENODEV;
4e570309 3562 goto err_out_free_res;
1da177e4
LT		 3563 }
3564
3565 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3566#ifdef CCISS_DEBUG
9f92f471 3567 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3568#endif /* CCISS_DEBUG */
3569 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3570 cfg_base_addr_index) +
3571 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3572 c->board_id = board_id;
3573
3574#ifdef CCISS_DEBUG
945f390f 3575 print_cfg_table(c->cfgtable);
7c832835 3576#endif /* CCISS_DEBUG */
1da177e4 3577
49153998
MM		 3578 /* Some controllers support Zero Memory Raid (ZMR).
3579 * When configured in ZMR mode the number of supported
3580 * commands drops to 64. So instead of just setting an
3581 * arbitrary value we make the driver a little smarter.
3582 * We read the config table to tell us how many commands
3583 * are supported on the controller then subtract 4 to
3584 * leave a little room for ioctl calls.
3585 */
3586 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3587 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3588 if (board_id == products[i].board_id) {
3589 c->product_name = products[i].product_name;
3590 c->access = *(products[i].access);
49153998 3591 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3592 break;
3593 }
3594 }
7c832835
BH		 3595 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3596 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3597 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3598 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3599 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3600 err = -ENODEV;
4e570309 3601 goto err_out_free_res;
1da177e4 3602 }
4ff9a9a4
MM		 3603 /* We didn't find the controller in our list. We know the
3604 * signature is valid. If it's an HP device let's try to
3605 * bind to the device and fire it up. Otherwise we bail.
3606 */
3607 if (i == ARRAY_SIZE(products)) {
3608 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3609 c->product_name = products[i-1].product_name;
3610 c->access = *(products[i-1].access);
49153998 3611 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3612 printk(KERN_WARNING "cciss: This is an unknown "
3613 "Smart Array controller.\n"
3614 "cciss: Please update to the latest driver "
3615 "available from www.hp.com.\n");
3616 } else {
3617 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3618 " to access the Smart Array controller %08lx\n"
3619 , (unsigned long)board_id);
3620 err = -ENODEV;
3621 goto err_out_free_res;
3622 }
3623 }
1da177e4 3624#ifdef CONFIG_X86
7c832835
BH		 3625 {
3626 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3627 __u32 prefetch;
3628 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3629 prefetch |= 0x100;
3630 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3631 }
1da177e4
LT		 3632#endif
3633
8bf50f71
MMOD		 3634 /* Disabling DMA prefetch and refetch for the P600.
3635 * An ASIC bug may result in accesses to invalid memory addresses.
3636 * We've disabled prefetch for some time now. Testing with XEN
3637 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3638 */
3639 if(board_id == 0x3225103C) {
3640 __u32 dma_prefetch;
8bf50f71 3641 __u32 dma_refetch;
f92e2f5f
MM		 3642 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3643 dma_prefetch |= 0x8000;
3644 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3645 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3646 dma_refetch |= 0x1;
3647 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3648 }
3649
1da177e4
LT		 3650#ifdef CCISS_DEBUG
3651 printk("Trying to put board into Simple mode\n");
7c832835 3652#endif /* CCISS_DEBUG */
1da177e4 3653 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3654 /* Update the field, and then ring the doorbell */
3655 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3656 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3657
3658 /* under certain very rare conditions, this can take awhile.
3659 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3660 * as we enter this code.) */
7c832835 3661 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3662 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3663 break;
3664 /* delay and try again */
3665 set_current_state(TASK_INTERRUPTIBLE);
3666 schedule_timeout(10);
7c832835 3667 }
1da177e4
LT		 3668
3669#ifdef CCISS_DEBUG
7c832835
BH		 3670 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3671 readl(c->vaddr + SA5_DOORBELL));
3672#endif /* CCISS_DEBUG */
1da177e4 3673#ifdef CCISS_DEBUG
7c832835
BH		 3674 print_cfg_table(c->cfgtable);
3675#endif /* CCISS_DEBUG */
1da177e4 3676
7c832835 3677 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3678 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3679 " simple mode\n");
c33ac89b 3680 err = -ENODEV;
4e570309 3681 goto err_out_free_res;
1da177e4
LT		 3682 }
3683 return 0;
3684
5faad620 3685err_out_free_res:
872225ca
MM		 3686 /*
3687 * Deliberately omit pci_disable_device(): it does something nasty to
3688 * Smart Array controllers that pci_enable_device does not undo
3689 */
4e570309 3690 pci_release_regions(pdev);
c33ac89b 3691 return err;
1da177e4
LT		 3692}
3693
6ae5ce8e
MM		 3694/* Function to find the first free pointer into our hba[] array
3695 * Returns -1 if no free entries are left.
7c832835 3696 */
1da177e4
LT		 3697static int alloc_cciss_hba(void)
3698{
799202cb 3699 int i;
1da177e4 3700
7c832835 3701 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3702 if (!hba[i]) {
3703 ctlr_info_t *p;
f2912a12 3704
06ff37ff 3705 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3706 if (!p)
3707 goto Enomem;
1da177e4
LT		 3708 hba[i] = p;
3709 return i;
3710 }
3711 }
3712 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3713 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3714 return -1;
3715Enomem:
1da177e4 3716 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3717 return -1;
3718}
3719
3720static void free_hba(int i)
3721{
3722 ctlr_info_t *p = hba[i];
3723 int n;
3724
3725 hba[i] = NULL;
799202cb 3726 for (n = 0; n < CISS_MAX_LUN; n++)
1da177e4
LT		 3727 put_disk(p->gendisk[n]);
3728 kfree(p);
3729}
3730
82eb03cf
CC		 3731/* Send a message CDB to the firmware. */
3732static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3733{
3734 typedef struct {
3735 CommandListHeader_struct CommandHeader;
3736 RequestBlock_struct Request;
3737 ErrDescriptor_struct ErrorDescriptor;
3738 } Command;
3739 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3740 Command *cmd;
3741 dma_addr_t paddr64;
3742 uint32_t paddr32, tag;
3743 void __iomem *vaddr;
3744 int i, err;
3745
3746 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3747 if (vaddr == NULL)
3748 return -ENOMEM;
3749
3750 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3751 CCISS commands, so they must be allocated from the lower 4GiB of
3752 memory. */
e930438c 3753 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3754 if (err) {
3755 iounmap(vaddr);
3756 return -ENOMEM;
3757 }
3758
3759 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3760 if (cmd == NULL) {
3761 iounmap(vaddr);
3762 return -ENOMEM;
3763 }
3764
3765 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3766 although there's no guarantee, we assume that the address is at
3767 least 4-byte aligned (most likely, it's page-aligned). */
3768 paddr32 = paddr64;
3769
3770 cmd->CommandHeader.ReplyQueue = 0;
3771 cmd->CommandHeader.SGList = 0;
3772 cmd->CommandHeader.SGTotal = 0;
3773 cmd->CommandHeader.Tag.lower = paddr32;
3774 cmd->CommandHeader.Tag.upper = 0;
3775 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3776
3777 cmd->Request.CDBLen = 16;
3778 cmd->Request.Type.Type = TYPE_MSG;
3779 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3780 cmd->Request.Type.Direction = XFER_NONE;
3781 cmd->Request.Timeout = 0; /* Don't time out */
3782 cmd->Request.CDB[0] = opcode;
3783 cmd->Request.CDB[1] = type;
3784 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3785
3786 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3787 cmd->ErrorDescriptor.Addr.upper = 0;
3788 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3789
3790 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3791
3792 for (i = 0; i < 10; i++) {
3793 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3794 if ((tag & ~3) == paddr32)
3795 break;
3796 schedule_timeout_uninterruptible(HZ);
3797 }
3798
3799 iounmap(vaddr);
3800
3801 /* we leak the DMA buffer here ... no choice since the controller could
3802 still complete the command. */
3803 if (i == 10) {
3804 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3805 opcode, type);
3806 return -ETIMEDOUT;
3807 }
3808
3809 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3810
3811 if (tag & 2) {
3812 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3813 opcode, type);
3814 return -EIO;
3815 }
3816
3817 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
3818 opcode, type);
3819 return 0;
3820}
3821
3822#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
3823#define cciss_noop(p) cciss_message(p, 3, 0)
3824
3825static __devinit int cciss_reset_msi(struct pci_dev *pdev)
3826{
3827/* the #defines are stolen from drivers/pci/msi.h. */
3828#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
3829#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
3830
3831 int pos;
3832 u16 control = 0;
3833
3834 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3835 if (pos) {
3836 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3837 if (control & PCI_MSI_FLAGS_ENABLE) {
3838 printk(KERN_INFO "cciss: resetting MSI\n");
3839 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
3840 }
3841 }
3842
3843 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3844 if (pos) {
3845 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3846 if (control & PCI_MSIX_FLAGS_ENABLE) {
3847 printk(KERN_INFO "cciss: resetting MSI-X\n");
3848 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
3849 }
3850 }
3851
3852 return 0;
3853}
3854
3855/* This does a hard reset of the controller using PCI power management
3856 * states. */
3857static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
3858{
3859 u16 pmcsr, saved_config_space[32];
3860 int i, pos;
3861
3862 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
3863
3864 /* This is very nearly the same thing as
3865
3866 pci_save_state(pci_dev);
3867 pci_set_power_state(pci_dev, PCI_D3hot);
3868 pci_set_power_state(pci_dev, PCI_D0);
3869 pci_restore_state(pci_dev);
3870
3871 but we can't use these nice canned kernel routines on
3872 kexec, because they also check the MSI/MSI-X state in PCI
3873 configuration space and do the wrong thing when it is
3874 set/cleared. Also, the pci_save/restore_state functions
3875 violate the ordering requirements for restoring the
3876 configuration space from the CCISS document (see the
3877 comment below). So we roll our own .... */
3878
3879 for (i = 0; i < 32; i++)
3880 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
3881
3882 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3883 if (pos == 0) {
3884 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
3885 return -ENODEV;
3886 }
3887
3888 /* Quoting from the Open CISS Specification: "The Power
3889 * Management Control/Status Register (CSR) controls the power
3890 * state of the device. The normal operating state is D0,
3891 * CSR=00h. The software off state is D3, CSR=03h. To reset
3892 * the controller, place the interface device in D3 then to
3893 * D0, this causes a secondary PCI reset which will reset the
3894 * controller." */
3895
3896 /* enter the D3hot power management state */
3897 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3898 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3899 pmcsr |= PCI_D3hot;
3900 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3901
3902 schedule_timeout_uninterruptible(HZ >> 1);
3903
3904 /* enter the D0 power management state */
3905 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3906 pmcsr |= PCI_D0;
3907 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3908
3909 schedule_timeout_uninterruptible(HZ >> 1);
3910
3911 /* Restore the PCI configuration space. The Open CISS
3912 * Specification says, "Restore the PCI Configuration
3913 * Registers, offsets 00h through 60h. It is important to
3914 * restore the command register, 16-bits at offset 04h,
3915 * last. Do not restore the configuration status register,
3916 * 16-bits at offset 06h." Note that the offset is 2*i. */
3917 for (i = 0; i < 32; i++) {
3918 if (i == 2 || i == 3)
3919 continue;
3920 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
3921 }
3922 wmb();
3923 pci_write_config_word(pdev, 4, saved_config_space[2]);
3924
3925 return 0;
3926}
3927
1da177e4
LT		 3928/*
3929 * This is it. Find all the controllers and register them. I really hate
3930 * stealing all these major device numbers.
3931 * returns the number of block devices registered.
3932 */
3933static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 3934 const struct pci_device_id *ent)
1da177e4 3935{
1da177e4 3936 int i;
799202cb 3937 int j = 0;
1da177e4 3938 int rc;
22bece00
MM		 3939 int dac, return_code;
3940 InquiryData_struct *inq_buff = NULL;
1da177e4 3941
82eb03cf
CC		 3942 if (reset_devices) {
3943 /* Reset the controller with a PCI power-cycle */
3944 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
3945 return -ENODEV;
3946
5e18cfd0
JA		 3947 /* Now try to get the controller to respond to a no-op. Some
3948 devices (notably the HP Smart Array 5i Controller) need
3949 up to 30 seconds to respond. */
5e4c91c8 3950 for (i=0; i<30; i++) {
82eb03cf
CC		 3951 if (cciss_noop(pdev) == 0)
3952 break;
5e4c91c8
JA		 3953
3954 schedule_timeout_uninterruptible(HZ);
3955 }
3956 if (i == 30) {
3957 printk(KERN_ERR "cciss: controller seems dead\n");
3958 return -EBUSY;
82eb03cf
CC		 3959 }
3960 }
3961
1da177e4 3962 i = alloc_cciss_hba();
7c832835 3963 if (i < 0)
e2019b58 3964 return -1;
1f8ef380
MM		 3965
3966 hba[i]->busy_initializing = 1;
8a3173de
JA		 3967 INIT_HLIST_HEAD(&hba[i]->cmpQ);
3968 INIT_HLIST_HEAD(&hba[i]->reqQ);
1f8ef380 3969
1da177e4 3970 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 3971 goto clean0;
1da177e4
LT		 3972
3973 sprintf(hba[i]->devname, "cciss%d", i);
3974 hba[i]->ctlr = i;
3975 hba[i]->pdev = pdev;
3976
7fe06326
AP		 3977 if (cciss_create_hba_sysfs_entry(hba[i]))
3978 goto clean0;
3979
1da177e4 3980 /* configure PCI DMA stuff */
6a35528a 3981 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 3982 dac = 1;
284901a9 3983 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 3984 dac = 0;
1da177e4 3985 else {
40aabb58 3986 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 3987 goto clean1;
3988 }
3989
3990 /*
3991 * register with the major number, or get a dynamic major number
3992 * by passing 0 as argument. This is done for greater than
3993 * 8 controller support.
3994 */
3995 if (i < MAX_CTLR_ORIG)
564de74a 3996 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 3997 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 3998 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 3999 printk(KERN_ERR
7c832835
BH		 4000 "cciss: Unable to get major number %d for %s "
4001 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4002 goto clean1;
7c832835 4003 } else {
1da177e4
LT		 4004 if (i >= MAX_CTLR_ORIG)
4005 hba[i]->major = rc;
4006 }
4007
4008 /* make sure the board interrupts are off */
4009 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4010 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4011 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4012 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4013 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4014 goto clean2;
4015 }
40aabb58
BH		 4016
4017 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4018 hba[i]->devname, pdev->device, pci_name(pdev),
4019 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4020
4021 hba[i]->cmd_pool_bits =
061837bc
JL		 4022 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4023 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4024 hba[i]->cmd_pool = (CommandList_struct *)
4025 pci_alloc_consistent(hba[i]->pdev,
f880632f 4026 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4027 &(hba[i]->cmd_pool_dhandle));
4028 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4029 pci_alloc_consistent(hba[i]->pdev,
f880632f 4030 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4031 &(hba[i]->errinfo_pool_dhandle));
4032 if ((hba[i]->cmd_pool_bits == NULL)
4033 || (hba[i]->cmd_pool == NULL)
4034 || (hba[i]->errinfo_pool == NULL)) {
4035 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4036 goto clean4;
4037 }
3da8b713 4038#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4039 hba[i]->scsi_rejects.complete =
4040 kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
f880632f 4041 (hba[i]->nr_cmds + 5), GFP_KERNEL);
3da8b713 4042 if (hba[i]->scsi_rejects.complete == NULL) {
7c832835 4043 printk(KERN_ERR "cciss: out of memory");
3da8b713 4044 goto clean4;
4045 }
4046#endif
1da177e4 4047 spin_lock_init(&hba[i]->lock);
1da177e4 4048
7c832835
BH		 4049 /* Initialize the pdev driver private data.
4050 have it point to hba[i]. */
1da177e4 4051 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4052 /* command and error info recs zeroed out before
4053 they are used */
4054 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4055 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4056 * sizeof(unsigned long));
1da177e4 4057
6ae5ce8e
MM		 4058 hba[i]->num_luns = 0;
4059 hba[i]->highest_lun = -1;
4060 for (j = 0; j < CISS_MAX_LUN; j++) {
4061 hba[i]->drv[j].raid_level = -1;
4062 hba[i]->drv[j].queue = NULL;
4063 hba[i]->gendisk[j] = NULL;
4064 }
1da177e4
LT		 4065
4066 cciss_scsi_setup(i);
4067
4068 /* Turn the interrupts on so we can service requests */
4069 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4070
22bece00
MM		 4071 /* Get the firmware version */
4072 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4073 if (inq_buff == NULL) {
4074 printk(KERN_ERR "cciss: out of memory\n");
4075 goto clean4;
4076 }
4077
4078 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
4079 sizeof(InquiryData_struct), 0, 0 , 0, TYPE_CMD);
4080 if (return_code == IO_OK) {
4081 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4082 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4083 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4084 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4085 } else { /* send command failed */
4086 printk(KERN_WARNING "cciss: unable to determine firmware"
4087 " version of controller\n");
4088 }
4089
1da177e4 4090 cciss_procinit(i);
92c4231a
MM		 4091
4092 hba[i]->cciss_max_sectors = 2048;
4093
d6dbf42e 4094 hba[i]->busy_initializing = 0;
1da177e4 4095
6ae5ce8e 4096 rebuild_lun_table(hba[i], 1);
0a9279cc
MM		 4097 hba[i]->cciss_scan_thread = kthread_run(scan_thread, hba[i],
4098 "cciss_scan%02d", i);
4099 if (IS_ERR(hba[i]->cciss_scan_thread))
4100 return PTR_ERR(hba[i]->cciss_scan_thread);
4101
e2019b58 4102 return 1;
1da177e4 4103
6ae5ce8e 4104clean4:
22bece00 4105 kfree(inq_buff);
3da8b713 4106#ifdef CONFIG_CISS_SCSI_TAPE
1acc0b0b 4107 kfree(hba[i]->scsi_rejects.complete);
3da8b713 4108#endif
6044ec88 4109 kfree(hba[i]->cmd_pool_bits);
7c832835 4110 if (hba[i]->cmd_pool)
1da177e4 4111 pci_free_consistent(hba[i]->pdev,
f880632f 4112 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4113 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4114 if (hba[i]->errinfo_pool)
1da177e4 4115 pci_free_consistent(hba[i]->pdev,
f880632f 4116 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4117 hba[i]->errinfo_pool,
4118 hba[i]->errinfo_pool_dhandle);
fb86a35b 4119 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4120clean2:
1da177e4 4121 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4122clean1:
7fe06326
AP		 4123 cciss_destroy_hba_sysfs_entry(hba[i]);
4124clean0:
1f8ef380 4125 hba[i]->busy_initializing = 0;
799202cb
MM		 4126 /* cleanup any queues that may have been initialized */
4127 for (j=0; j <= hba[i]->highest_lun; j++){
4128 drive_info_struct *drv = &(hba[i]->drv[j]);
4129 if (drv->queue)
4130 blk_cleanup_queue(drv->queue);
4131 }
872225ca
MM		 4132 /*
4133 * Deliberately omit pci_disable_device(): it does something nasty to
4134 * Smart Array controllers that pci_enable_device does not undo
4135 */
799202cb 4136 pci_release_regions(pdev);
799202cb 4137 pci_set_drvdata(pdev, NULL);
61808c2b 4138 free_hba(i);
e2019b58 4139 return -1;
1da177e4
LT		 4140}
4141
e9ca75b5 4142static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4143{
4144 ctlr_info_t *tmp_ptr;
e9ca75b5 4145 int i;
1da177e4 4146 char flush_buf[4];
7c832835 4147 int return_code;
1da177e4 4148
e9ca75b5
GB		 4149 tmp_ptr = pci_get_drvdata(pdev);
4150 if (tmp_ptr == NULL)
4151 return;
4152 i = tmp_ptr->ctlr;
4153 if (hba[i] == NULL)
4154 return;
4155
4156 /* Turn board interrupts off and send the flush cache command */
4157 /* sendcmd will turn off interrupt, and send the flush...
4158 * To write all data in the battery backed cache to disks */
4159 memset(flush_buf, 0, 4);
4160 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
4161 TYPE_CMD);
4162 if (return_code == IO_OK) {
4163 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4164 } else {
4165 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4166 }
4167 free_irq(hba[i]->intr[2], hba[i]);
4168}
4169
4170static void __devexit cciss_remove_one(struct pci_dev *pdev)
4171{
4172 ctlr_info_t *tmp_ptr;
4173 int i, j;
4174
7c832835
BH		 4175 if (pci_get_drvdata(pdev) == NULL) {
4176 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4177 return;
4178 }
0a9279cc 4179
1da177e4
LT		 4180 tmp_ptr = pci_get_drvdata(pdev);
4181 i = tmp_ptr->ctlr;
7c832835 4182 if (hba[i] == NULL) {
1da177e4 4183 printk(KERN_ERR "cciss: device appears to "
7c832835 4184 "already be removed \n");
1da177e4
LT		 4185 return;
4186 }
b6550777 4187
0a9279cc
MM		 4188 kthread_stop(hba[i]->cciss_scan_thread);
4189
b6550777
BH		 4190 remove_proc_entry(hba[i]->devname, proc_cciss);
4191 unregister_blkdev(hba[i]->major, hba[i]->devname);
4192
4193 /* remove it from the disk list */
4194 for (j = 0; j < CISS_MAX_LUN; j++) {
4195 struct gendisk *disk = hba[i]->gendisk[j];
4196 if (disk) {
165125e1 4197 struct request_queue *q = disk->queue;
b6550777
BH		 4198
4199 if (disk->flags & GENHD_FL_UP)
4200 del_gendisk(disk);
4201 if (q)
4202 blk_cleanup_queue(q);
4203 }
4204 }
4205
ba198efb 4206#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4207 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4208#endif
b6550777 4209
e9ca75b5 4210 cciss_shutdown(pdev);
fb86a35b
MM		 4211
4212#ifdef CONFIG_PCI_MSI
7c832835
BH		 4213 if (hba[i]->msix_vector)
4214 pci_disable_msix(hba[i]->pdev);
4215 else if (hba[i]->msi_vector)
4216 pci_disable_msi(hba[i]->pdev);
4217#endif /* CONFIG_PCI_MSI */
fb86a35b 4218
1da177e4 4219 iounmap(hba[i]->vaddr);
1da177e4 4220
f880632f 4221 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4222 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4223 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4224 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4225 kfree(hba[i]->cmd_pool_bits);
3da8b713 4226#ifdef CONFIG_CISS_SCSI_TAPE
4227 kfree(hba[i]->scsi_rejects.complete);
4228#endif
872225ca
MM		 4229 /*
4230 * Deliberately omit pci_disable_device(): it does something nasty to
4231 * Smart Array controllers that pci_enable_device does not undo
4232 */
7c832835 4233 pci_release_regions(pdev);
4e570309 4234 pci_set_drvdata(pdev, NULL);
7fe06326 4235 cciss_destroy_hba_sysfs_entry(hba[i]);
1da177e4 4236 free_hba(i);
7c832835 4237}
1da177e4
LT		 4238
4239static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4240 .name = "cciss",
4241 .probe = cciss_init_one,
4242 .remove = __devexit_p(cciss_remove_one),
4243 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4244 .shutdown = cciss_shutdown,
1da177e4
LT		 4245};
4246
4247/*
4248 * This is it. Register the PCI driver information for the cards we control
7c832835 4249 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4250 */
4251static int __init cciss_init(void)
4252{
7fe06326
AP		 4253 int err;
4254
10cbda97
JA		 4255 /*
4256 * The hardware requires that commands are aligned on a 64-bit
4257 * boundary. Given that we use pci_alloc_consistent() to allocate an
4258 * array of them, the size must be a multiple of 8 bytes.
4259 */
4260 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4261
1da177e4
LT		 4262 printk(KERN_INFO DRIVER_NAME "\n");
4263
7fe06326
AP		 4264 err = bus_register(&cciss_bus_type);
4265 if (err)
4266 return err;
4267
1da177e4 4268 /* Register for our PCI devices */
7fe06326
AP		 4269 err = pci_register_driver(&cciss_pci_driver);
4270 if (err)
4271 goto err_bus_register;
4272
4273 return 0;
4274
4275err_bus_register:
4276 bus_unregister(&cciss_bus_type);
4277 return err;
1da177e4
LT		 4278}
4279
4280static void __exit cciss_cleanup(void)
4281{
4282 int i;
4283
4284 pci_unregister_driver(&cciss_pci_driver);
4285 /* double check that all controller entrys have been removed */
7c832835
BH		 4286 for (i = 0; i < MAX_CTLR; i++) {
4287 if (hba[i] != NULL) {
1da177e4 4288 printk(KERN_WARNING "cciss: had to remove"
7c832835 4289 " controller %d\n", i);
1da177e4
LT		 4290 cciss_remove_one(hba[i]->pdev);
4291 }
4292 }
928b4d8c 4293 remove_proc_entry("driver/cciss", NULL);
7fe06326 4294 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4295}
4296
33079b21
MM		 4297static void fail_all_cmds(unsigned long ctlr)
4298{
4299 /* If we get here, the board is apparently dead. */
4300 ctlr_info_t *h = hba[ctlr];
4301 CommandList_struct *c;
4302 unsigned long flags;
4303
4304 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4305 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4306
4307 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4308
7c832835 4309 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4310
4311 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4312 while (!hlist_empty(&h->reqQ)) {
4313 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4314 removeQ(c);
33079b21 4315 h->Qdepth--;
8a3173de 4316 addQ(&h->cmpQ, c);
33079b21
MM		 4317 }
4318
4319 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4320 while (!hlist_empty(&h->cmpQ)) {
4321 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4322 removeQ(c);
33079b21
MM		 4323 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4324 if (c->cmd_type == CMD_RWREQ) {
4325 complete_command(h, c, 0);
4326 } else if (c->cmd_type == CMD_IOCTL_PEND)
4327 complete(c->waiting);
4328#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4329 else if (c->cmd_type == CMD_SCSI)
4330 complete_scsi_command(c, 0, 0);
33079b21
MM		 4331#endif
4332 }
4333 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4334 return;
4335}
4336
1da177e4
LT		 4337module_init(cciss_init);
4338module_exit(cciss_cleanup);
Linux kernel - Deliverables
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