projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
cciss: simplify interface of sendcmd() and sendcmd_withirq()
[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,
7c832835
BH		 183 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
184static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 185 __u8 page_code, unsigned char scsi3addr[],
186 int cmd_type);
1da177e4 187
33079b21 188static void fail_all_cmds(unsigned long ctlr);
0a9279cc
MM		 189static int scan_thread(void *data);
190static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
33079b21 191
1da177e4 192#ifdef CONFIG_PROC_FS
1da177e4
LT		 193static void cciss_procinit(int i);
194#else
7c832835
BH		 195static void cciss_procinit(int i)
196{
197}
198#endif /* CONFIG_PROC_FS */
1da177e4
LT		 199
200#ifdef CONFIG_COMPAT
ef7822c2
AV		 201static int cciss_compat_ioctl(struct block_device *, fmode_t,
202 unsigned, unsigned long);
1da177e4
LT		 203#endif
204
7c832835
BH		 205static struct block_device_operations cciss_fops = {
206 .owner = THIS_MODULE,
ef7822c2
AV		 207 .open = cciss_open,
208 .release = cciss_release,
209 .locked_ioctl = cciss_ioctl,
7c832835 210 .getgeo = cciss_getgeo,
1da177e4 211#ifdef CONFIG_COMPAT
ef7822c2 212 .compat_ioctl = cciss_compat_ioctl,
1da177e4 213#endif
7c832835 214 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 215};
216
217/*
218 * Enqueuing and dequeuing functions for cmdlists.
219 */
8a3173de 220static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 221{
8a3173de 222 hlist_add_head(&c->list, list);
1da177e4
LT		 223}
224
8a3173de 225static inline void removeQ(CommandList_struct *c)
1da177e4 226{
8a3173de
JA		 227 if (WARN_ON(hlist_unhashed(&c->list)))
228 return;
229
230 hlist_del_init(&c->list);
1da177e4
LT		 231}
232
233#include "cciss_scsi.c" /* For SCSI tape support */
234
0f5486ec
RD		 235#define RAID_UNKNOWN 6
236
1da177e4
LT		 237#ifdef CONFIG_PROC_FS
238
239/*
240 * Report information about this controller.
241 */
242#define ENG_GIG 1000000000
243#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 244#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 245static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
246 "UNKNOWN"
247};
1da177e4
LT		 248
249static struct proc_dir_entry *proc_cciss;
250
89b6e743 251static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 252{
89b6e743
MM		 253 ctlr_info_t *h = seq->private;
254
255 seq_printf(seq, "%s: HP %s Controller\n"
256 "Board ID: 0x%08lx\n"
257 "Firmware Version: %c%c%c%c\n"
258 "IRQ: %d\n"
259 "Logical drives: %d\n"
260 "Current Q depth: %d\n"
261 "Current # commands on controller: %d\n"
262 "Max Q depth since init: %d\n"
263 "Max # commands on controller since init: %d\n"
264 "Max SG entries since init: %d\n",
265 h->devname,
266 h->product_name,
267 (unsigned long)h->board_id,
268 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
269 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
270 h->num_luns,
271 h->Qdepth, h->commands_outstanding,
272 h->maxQsinceinit, h->max_outstanding, h->maxSG);
273
274#ifdef CONFIG_CISS_SCSI_TAPE
275 cciss_seq_tape_report(seq, h->ctlr);
276#endif /* CONFIG_CISS_SCSI_TAPE */
277}
1da177e4 278
89b6e743
MM		 279static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
280{
281 ctlr_info_t *h = seq->private;
282 unsigned ctlr = h->ctlr;
283 unsigned long flags;
1da177e4
LT		 284
285 /* prevent displaying bogus info during configuration
286 * or deconfiguration of a logical volume
287 */
288 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
289 if (h->busy_configuring) {
290 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 291 return ERR_PTR(-EBUSY);
1da177e4
LT		 292 }
293 h->busy_configuring = 1;
294 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
295
89b6e743
MM		 296 if (*pos == 0)
297 cciss_seq_show_header(seq);
298
299 return pos;
300}
301
302static int cciss_seq_show(struct seq_file *seq, void *v)
303{
304 sector_t vol_sz, vol_sz_frac;
305 ctlr_info_t *h = seq->private;
306 unsigned ctlr = h->ctlr;
307 loff_t *pos = v;
308 drive_info_struct *drv = &h->drv[*pos];
309
310 if (*pos > h->highest_lun)
311 return 0;
312
313 if (drv->heads == 0)
314 return 0;
315
316 vol_sz = drv->nr_blocks;
317 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
318 vol_sz_frac *= 100;
319 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
320
321 if (drv->raid_level > 5)
322 drv->raid_level = RAID_UNKNOWN;
323 seq_printf(seq, "cciss/c%dd%d:"
324 "\t%4u.%02uGB\tRAID %s\n",
325 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
326 raid_label[drv->raid_level]);
327 return 0;
328}
329
330static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
331{
332 ctlr_info_t *h = seq->private;
333
334 if (*pos > h->highest_lun)
335 return NULL;
336 *pos += 1;
337
338 return pos;
339}
340
341static void cciss_seq_stop(struct seq_file *seq, void *v)
342{
343 ctlr_info_t *h = seq->private;
344
345 /* Only reset h->busy_configuring if we succeeded in setting
346 * it during cciss_seq_start. */
347 if (v == ERR_PTR(-EBUSY))
348 return;
7c832835 349
1da177e4 350 h->busy_configuring = 0;
1da177e4
LT		 351}
352
89b6e743
MM		 353static struct seq_operations cciss_seq_ops = {
354 .start = cciss_seq_start,
355 .show = cciss_seq_show,
356 .next = cciss_seq_next,
357 .stop = cciss_seq_stop,
358};
359
360static int cciss_seq_open(struct inode *inode, struct file *file)
361{
362 int ret = seq_open(file, &cciss_seq_ops);
363 struct seq_file *seq = file->private_data;
364
365 if (!ret)
366 seq->private = PDE(inode)->data;
367
368 return ret;
369}
370
371static ssize_t
372cciss_proc_write(struct file *file, const char __user *buf,
373 size_t length, loff_t *ppos)
1da177e4 374{
89b6e743
MM		 375 int err;
376 char *buffer;
377
378#ifndef CONFIG_CISS_SCSI_TAPE
379 return -EINVAL;
1da177e4
LT		 380#endif
381
89b6e743 382 if (!buf || length > PAGE_SIZE - 1)
7c832835 383 return -EINVAL;
89b6e743
MM		 384
385 buffer = (char *)__get_free_page(GFP_KERNEL);
386 if (!buffer)
387 return -ENOMEM;
388
389 err = -EFAULT;
390 if (copy_from_user(buffer, buf, length))
391 goto out;
392 buffer[length] = '\0';
393
394#ifdef CONFIG_CISS_SCSI_TAPE
395 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
396 struct seq_file *seq = file->private_data;
397 ctlr_info_t *h = seq->private;
398 int rc;
399
7c832835
BH		 400 rc = cciss_engage_scsi(h->ctlr);
401 if (rc != 0)
89b6e743
MM		 402 err = -rc;
403 else
404 err = length;
405 } else
406#endif /* CONFIG_CISS_SCSI_TAPE */
407 err = -EINVAL;
7c832835
BH		 408 /* might be nice to have "disengage" too, but it's not
409 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 410
411out:
412 free_page((unsigned long)buffer);
413 return err;
1da177e4
LT		 414}
415
89b6e743
MM		 416static struct file_operations cciss_proc_fops = {
417 .owner = THIS_MODULE,
418 .open = cciss_seq_open,
419 .read = seq_read,
420 .llseek = seq_lseek,
421 .release = seq_release,
422 .write = cciss_proc_write,
423};
424
1da177e4
LT		 425static void __devinit cciss_procinit(int i)
426{
427 struct proc_dir_entry *pde;
428
89b6e743 429 if (proc_cciss == NULL)
928b4d8c 430 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 431 if (!proc_cciss)
432 return;
3dfcf9c4 433 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 434 S_IROTH, proc_cciss,
3dfcf9c4 435 &cciss_proc_fops, hba[i]);
1da177e4 436}
7c832835 437#endif /* CONFIG_PROC_FS */
1da177e4 438
7fe06326
AP		 439#define MAX_PRODUCT_NAME_LEN 19
440
441#define to_hba(n) container_of(n, struct ctlr_info, dev)
442#define to_drv(n) container_of(n, drive_info_struct, dev)
443
444static struct device_type cciss_host_type = {
445 .name = "cciss_host",
446};
447
448static ssize_t dev_show_unique_id(struct device *dev,
449 struct device_attribute *attr,
450 char *buf)
451{
452 drive_info_struct *drv = to_drv(dev);
453 struct ctlr_info *h = to_hba(drv->dev.parent);
454 __u8 sn[16];
455 unsigned long flags;
456 int ret = 0;
457
458 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
459 if (h->busy_configuring)
460 ret = -EBUSY;
461 else
462 memcpy(sn, drv->serial_no, sizeof(sn));
463 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
464
465 if (ret)
466 return ret;
467 else
468 return snprintf(buf, 16 * 2 + 2,
469 "%02X%02X%02X%02X%02X%02X%02X%02X"
470 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
471 sn[0], sn[1], sn[2], sn[3],
472 sn[4], sn[5], sn[6], sn[7],
473 sn[8], sn[9], sn[10], sn[11],
474 sn[12], sn[13], sn[14], sn[15]);
475}
476DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
477
478static ssize_t dev_show_vendor(struct device *dev,
479 struct device_attribute *attr,
480 char *buf)
481{
482 drive_info_struct *drv = to_drv(dev);
483 struct ctlr_info *h = to_hba(drv->dev.parent);
484 char vendor[VENDOR_LEN + 1];
485 unsigned long flags;
486 int ret = 0;
487
488 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
489 if (h->busy_configuring)
490 ret = -EBUSY;
491 else
492 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
493 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
494
495 if (ret)
496 return ret;
497 else
498 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
499}
500DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
501
502static ssize_t dev_show_model(struct device *dev,
503 struct device_attribute *attr,
504 char *buf)
505{
506 drive_info_struct *drv = to_drv(dev);
507 struct ctlr_info *h = to_hba(drv->dev.parent);
508 char model[MODEL_LEN + 1];
509 unsigned long flags;
510 int ret = 0;
511
512 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
513 if (h->busy_configuring)
514 ret = -EBUSY;
515 else
516 memcpy(model, drv->model, MODEL_LEN + 1);
517 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
518
519 if (ret)
520 return ret;
521 else
522 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
523}
524DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
525
526static ssize_t dev_show_rev(struct device *dev,
527 struct device_attribute *attr,
528 char *buf)
529{
530 drive_info_struct *drv = to_drv(dev);
531 struct ctlr_info *h = to_hba(drv->dev.parent);
532 char rev[REV_LEN + 1];
533 unsigned long flags;
534 int ret = 0;
535
536 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
537 if (h->busy_configuring)
538 ret = -EBUSY;
539 else
540 memcpy(rev, drv->rev, REV_LEN + 1);
541 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
542
543 if (ret)
544 return ret;
545 else
546 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
547}
548DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
549
550static struct attribute *cciss_dev_attrs[] = {
551 &dev_attr_unique_id.attr,
552 &dev_attr_model.attr,
553 &dev_attr_vendor.attr,
554 &dev_attr_rev.attr,
555 NULL
556};
557
558static struct attribute_group cciss_dev_attr_group = {
559 .attrs = cciss_dev_attrs,
560};
561
562static struct attribute_group *cciss_dev_attr_groups[] = {
563 &cciss_dev_attr_group,
564 NULL
565};
566
567static struct device_type cciss_dev_type = {
568 .name = "cciss_device",
569 .groups = cciss_dev_attr_groups,
570};
571
572static struct bus_type cciss_bus_type = {
573 .name = "cciss",
574};
575
576
577/*
578 * Initialize sysfs entry for each controller. This sets up and registers
579 * the 'cciss#' directory for each individual controller under
580 * /sys/bus/pci/devices/<dev>/.
581 */
582static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
583{
584 device_initialize(&h->dev);
585 h->dev.type = &cciss_host_type;
586 h->dev.bus = &cciss_bus_type;
587 dev_set_name(&h->dev, "%s", h->devname);
588 h->dev.parent = &h->pdev->dev;
589
590 return device_add(&h->dev);
591}
592
593/*
594 * Remove sysfs entries for an hba.
595 */
596static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
597{
598 device_del(&h->dev);
599}
600
601/*
602 * Initialize sysfs for each logical drive. This sets up and registers
603 * the 'c#d#' directory for each individual logical drive under
604 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
605 * /sys/block/cciss!c#d# to this entry.
606 */
607static int cciss_create_ld_sysfs_entry(struct ctlr_info *h,
608 drive_info_struct *drv,
609 int drv_index)
610{
611 device_initialize(&drv->dev);
612 drv->dev.type = &cciss_dev_type;
613 drv->dev.bus = &cciss_bus_type;
614 dev_set_name(&drv->dev, "c%dd%d", h->ctlr, drv_index);
615 drv->dev.parent = &h->dev;
616 return device_add(&drv->dev);
617}
618
619/*
620 * Remove sysfs entries for a logical drive.
621 */
622static void cciss_destroy_ld_sysfs_entry(drive_info_struct *drv)
623{
624 device_del(&drv->dev);
625}
626
7c832835
BH		 627/*
628 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 629 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 630 * which ones are free or in use. For operations that can wait for kmalloc
631 * to possible sleep, this routine can be called with get_from_pool set to 0.
632 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
633 */
634static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 635{
636 CommandList_struct *c;
7c832835 637 int i;
1da177e4
LT		 638 u64bit temp64;
639 dma_addr_t cmd_dma_handle, err_dma_handle;
640
7c832835
BH		 641 if (!get_from_pool) {
642 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
643 sizeof(CommandList_struct), &cmd_dma_handle);
644 if (c == NULL)
645 return NULL;
1da177e4
LT		 646 memset(c, 0, sizeof(CommandList_struct));
647
33079b21
MM		 648 c->cmdindex = -1;
649
7c832835
BH		 650 c->err_info = (ErrorInfo_struct *)
651 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
652 &err_dma_handle);
653
654 if (c->err_info == NULL) {
655 pci_free_consistent(h->pdev,
1da177e4
LT		 656 sizeof(CommandList_struct), c, cmd_dma_handle);
657 return NULL;
658 }
659 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 660 } else { /* get it out of the controllers pool */
661
662 do {
f880632f
MM		 663 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
664 if (i == h->nr_cmds)
7c832835
BH		 665 return NULL;
666 } while (test_and_set_bit
667 (i & (BITS_PER_LONG - 1),
668 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 669#ifdef CCISS_DEBUG
670 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
671#endif
7c832835 672 c = h->cmd_pool + i;
1da177e4 673 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 674 cmd_dma_handle = h->cmd_pool_dhandle
675 + i * sizeof(CommandList_struct);
1da177e4
LT		 676 c->err_info = h->errinfo_pool + i;
677 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 678 err_dma_handle = h->errinfo_pool_dhandle
679 + i * sizeof(ErrorInfo_struct);
680 h->nr_allocs++;
33079b21
MM		 681
682 c->cmdindex = i;
7c832835 683 }
1da177e4 684
8a3173de 685 INIT_HLIST_NODE(&c->list);
1da177e4 686 c->busaddr = (__u32) cmd_dma_handle;
7c832835 687 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 688 c->ErrDesc.Addr.lower = temp64.val32.lower;
689 c->ErrDesc.Addr.upper = temp64.val32.upper;
690 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 691
7c832835
BH		 692 c->ctlr = h->ctlr;
693 return c;
1da177e4
LT		 694}
695
7c832835
BH		 696/*
697 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 698 */
699static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
700{
701 int i;
702 u64bit temp64;
703
7c832835 704 if (!got_from_pool) {
1da177e4
LT		 705 temp64.val32.lower = c->ErrDesc.Addr.lower;
706 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 707 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
708 c->err_info, (dma_addr_t) temp64.val);
709 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
710 c, (dma_addr_t) c->busaddr);
711 } else {
1da177e4 712 i = c - h->cmd_pool;
7c832835
BH		 713 clear_bit(i & (BITS_PER_LONG - 1),
714 h->cmd_pool_bits + (i / BITS_PER_LONG));
715 h->nr_frees++;
716 }
1da177e4
LT		 717}
718
719static inline ctlr_info_t *get_host(struct gendisk *disk)
720{
7c832835 721 return disk->queue->queuedata;
1da177e4
LT		 722}
723
724static inline drive_info_struct *get_drv(struct gendisk *disk)
725{
726 return disk->private_data;
727}
728
729/*
730 * Open. Make sure the device is really there.
731 */
ef7822c2 732static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 733{
ef7822c2
AV		 734 ctlr_info_t *host = get_host(bdev->bd_disk);
735 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 736
737#ifdef CCISS_DEBUG
ef7822c2 738 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 739#endif /* CCISS_DEBUG */
1da177e4 740
ddd47442
MM		 741 if (host->busy_initializing || drv->busy_configuring)
742 return -EBUSY;
1da177e4
LT		 743 /*
744 * Root is allowed to open raw volume zero even if it's not configured
745 * so array config can still work. Root is also allowed to open any
746 * volume that has a LUN ID, so it can issue IOCTL to reread the
747 * disk information. I don't think I really like this
748 * but I'm already using way to many device nodes to claim another one
749 * for "raw controller".
750 */
7a06f789 751 if (drv->heads == 0) {
ef7822c2 752 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 753 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 754 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 755 return -ENXIO;
1da177e4
LT		 756 /* if it is, make sure we have a LUN ID */
757 } else if (drv->LunID == 0) {
758 return -ENXIO;
759 }
760 }
761 if (!capable(CAP_SYS_ADMIN))
762 return -EPERM;
763 }
764 drv->usage_count++;
765 host->usage_count++;
766 return 0;
767}
7c832835 768
1da177e4
LT		 769/*
770 * Close. Sync first.
771 */
ef7822c2 772static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 773{
ef7822c2
AV		 774 ctlr_info_t *host = get_host(disk);
775 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 776
777#ifdef CCISS_DEBUG
ef7822c2 778 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 779#endif /* CCISS_DEBUG */
1da177e4
LT		 780
781 drv->usage_count--;
782 host->usage_count--;
783 return 0;
784}
785
786#ifdef CONFIG_COMPAT
787
ef7822c2
AV		 788static int do_ioctl(struct block_device *bdev, fmode_t mode,
789 unsigned cmd, unsigned long arg)
1da177e4
LT		 790{
791 int ret;
792 lock_kernel();
ef7822c2 793 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 794 unlock_kernel();
795 return ret;
796}
797
ef7822c2
AV		 798static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
799 unsigned cmd, unsigned long arg);
800static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
801 unsigned cmd, unsigned long arg);
1da177e4 802
ef7822c2
AV		 803static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
804 unsigned cmd, unsigned long arg)
1da177e4
LT		 805{
806 switch (cmd) {
807 case CCISS_GETPCIINFO:
808 case CCISS_GETINTINFO:
809 case CCISS_SETINTINFO:
810 case CCISS_GETNODENAME:
811 case CCISS_SETNODENAME:
812 case CCISS_GETHEARTBEAT:
813 case CCISS_GETBUSTYPES:
814 case CCISS_GETFIRMVER:
815 case CCISS_GETDRIVVER:
816 case CCISS_REVALIDVOLS:
817 case CCISS_DEREGDISK:
818 case CCISS_REGNEWDISK:
819 case CCISS_REGNEWD:
820 case CCISS_RESCANDISK:
821 case CCISS_GETLUNINFO:
ef7822c2 822 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 823
824 case CCISS_PASSTHRU32:
ef7822c2 825 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 826 case CCISS_BIG_PASSTHRU32:
ef7822c2 827 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 828
829 default:
830 return -ENOIOCTLCMD;
831 }
832}
833
ef7822c2
AV		 834static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
835 unsigned cmd, unsigned long arg)
1da177e4
LT		 836{
837 IOCTL32_Command_struct __user *arg32 =
7c832835 838 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 839 IOCTL_Command_struct arg64;
840 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
841 int err;
842 u32 cp;
843
844 err = 0;
7c832835
BH		 845 err |=
846 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
847 sizeof(arg64.LUN_info));
848 err |=
849 copy_from_user(&arg64.Request, &arg32->Request,
850 sizeof(arg64.Request));
851 err |=
852 copy_from_user(&arg64.error_info, &arg32->error_info,
853 sizeof(arg64.error_info));
1da177e4
LT		 854 err |= get_user(arg64.buf_size, &arg32->buf_size);
855 err |= get_user(cp, &arg32->buf);
856 arg64.buf = compat_ptr(cp);
857 err |= copy_to_user(p, &arg64, sizeof(arg64));
858
859 if (err)
860 return -EFAULT;
861
ef7822c2 862 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 863 if (err)
864 return err;
7c832835
BH		 865 err |=
866 copy_in_user(&arg32->error_info, &p->error_info,
867 sizeof(arg32->error_info));
1da177e4
LT		 868 if (err)
869 return -EFAULT;
870 return err;
871}
872
ef7822c2
AV		 873static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
874 unsigned cmd, unsigned long arg)
1da177e4
LT		 875{
876 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 877 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 878 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 879 BIG_IOCTL_Command_struct __user *p =
880 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 881 int err;
882 u32 cp;
883
884 err = 0;
7c832835
BH		 885 err |=
886 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
887 sizeof(arg64.LUN_info));
888 err |=
889 copy_from_user(&arg64.Request, &arg32->Request,
890 sizeof(arg64.Request));
891 err |=
892 copy_from_user(&arg64.error_info, &arg32->error_info,
893 sizeof(arg64.error_info));
1da177e4
LT		 894 err |= get_user(arg64.buf_size, &arg32->buf_size);
895 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
896 err |= get_user(cp, &arg32->buf);
897 arg64.buf = compat_ptr(cp);
898 err |= copy_to_user(p, &arg64, sizeof(arg64));
899
900 if (err)
7c832835 901 return -EFAULT;
1da177e4 902
ef7822c2 903 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 904 if (err)
905 return err;
7c832835
BH		 906 err |=
907 copy_in_user(&arg32->error_info, &p->error_info,
908 sizeof(arg32->error_info));
1da177e4
LT		 909 if (err)
910 return -EFAULT;
911 return err;
912}
913#endif
a885c8c4
CH		 914
915static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
916{
917 drive_info_struct *drv = get_drv(bdev->bd_disk);
918
919 if (!drv->cylinders)
920 return -ENXIO;
921
922 geo->heads = drv->heads;
923 geo->sectors = drv->sectors;
924 geo->cylinders = drv->cylinders;
925 return 0;
926}
927
0a9279cc
MM		 928static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
929{
930 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
931 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
932 (void)check_for_unit_attention(host, c);
933}
1da177e4 934/*
7c832835 935 * ioctl
1da177e4 936 */
ef7822c2 937static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 938 unsigned int cmd, unsigned long arg)
1da177e4 939{
1da177e4
LT		 940 struct gendisk *disk = bdev->bd_disk;
941 ctlr_info_t *host = get_host(disk);
942 drive_info_struct *drv = get_drv(disk);
943 int ctlr = host->ctlr;
944 void __user *argp = (void __user *)arg;
945
946#ifdef CCISS_DEBUG
947 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 948#endif /* CCISS_DEBUG */
949
950 switch (cmd) {
1da177e4 951 case CCISS_GETPCIINFO:
7c832835
BH		 952 {
953 cciss_pci_info_struct pciinfo;
954
955 if (!arg)
956 return -EINVAL;
957 pciinfo.domain = pci_domain_nr(host->pdev->bus);
958 pciinfo.bus = host->pdev->bus->number;
959 pciinfo.dev_fn = host->pdev->devfn;
960 pciinfo.board_id = host->board_id;
961 if (copy_to_user
962 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
963 return -EFAULT;
964 return 0;
965 }
1da177e4 966 case CCISS_GETINTINFO:
7c832835
BH		 967 {
968 cciss_coalint_struct intinfo;
969 if (!arg)
970 return -EINVAL;
971 intinfo.delay =
972 readl(&host->cfgtable->HostWrite.CoalIntDelay);
973 intinfo.count =
974 readl(&host->cfgtable->HostWrite.CoalIntCount);
975 if (copy_to_user
976 (argp, &intinfo, sizeof(cciss_coalint_struct)))
977 return -EFAULT;
978 return 0;
979 }
1da177e4 980 case CCISS_SETINTINFO:
1da177e4 981 {
7c832835
BH		 982 cciss_coalint_struct intinfo;
983 unsigned long flags;
984 int i;
985
986 if (!arg)
987 return -EINVAL;
988 if (!capable(CAP_SYS_ADMIN))
989 return -EPERM;
990 if (copy_from_user
991 (&intinfo, argp, sizeof(cciss_coalint_struct)))
992 return -EFAULT;
993 if ((intinfo.delay == 0) && (intinfo.count == 0))
994 {
995// printk("cciss_ioctl: delay and count cannot be 0\n");
996 return -EINVAL;
997 }
998 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
999 /* Update the field, and then ring the doorbell */
1000 writel(intinfo.delay,
1001 &(host->cfgtable->HostWrite.CoalIntDelay));
1002 writel(intinfo.count,
1003 &(host->cfgtable->HostWrite.CoalIntCount));
1004 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1005
1006 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1007 if (!(readl(host->vaddr + SA5_DOORBELL)
1008 & CFGTBL_ChangeReq))
1009 break;
1010 /* delay and try again */
1011 udelay(1000);
1012 }
1013 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1014 if (i >= MAX_IOCTL_CONFIG_WAIT)
1015 return -EAGAIN;
1016 return 0;
1da177e4 1017 }
1da177e4 1018 case CCISS_GETNODENAME:
7c832835
BH		 1019 {
1020 NodeName_type NodeName;
1021 int i;
1022
1023 if (!arg)
1024 return -EINVAL;
1025 for (i = 0; i < 16; i++)
1026 NodeName[i] =
1027 readb(&host->cfgtable->ServerName[i]);
1028 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1029 return -EFAULT;
1030 return 0;
1031 }
1da177e4 1032 case CCISS_SETNODENAME:
7c832835
BH		 1033 {
1034 NodeName_type NodeName;
1035 unsigned long flags;
1036 int i;
1037
1038 if (!arg)
1039 return -EINVAL;
1040 if (!capable(CAP_SYS_ADMIN))
1041 return -EPERM;
1042
1043 if (copy_from_user
1044 (NodeName, argp, sizeof(NodeName_type)))
1045 return -EFAULT;
1046
1047 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1048
1049 /* Update the field, and then ring the doorbell */
1050 for (i = 0; i < 16; i++)
1051 writeb(NodeName[i],
1052 &host->cfgtable->ServerName[i]);
1053
1054 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1055
1056 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1057 if (!(readl(host->vaddr + SA5_DOORBELL)
1058 & CFGTBL_ChangeReq))
1059 break;
1060 /* delay and try again */
1061 udelay(1000);
1062 }
1063 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1064 if (i >= MAX_IOCTL_CONFIG_WAIT)
1065 return -EAGAIN;
1066 return 0;
1067 }
1da177e4
LT		 1068
1069 case CCISS_GETHEARTBEAT:
7c832835
BH		 1070 {
1071 Heartbeat_type heartbeat;
1072
1073 if (!arg)
1074 return -EINVAL;
1075 heartbeat = readl(&host->cfgtable->HeartBeat);
1076 if (copy_to_user
1077 (argp, &heartbeat, sizeof(Heartbeat_type)))
1078 return -EFAULT;
1079 return 0;
1080 }
1da177e4 1081 case CCISS_GETBUSTYPES:
7c832835
BH		 1082 {
1083 BusTypes_type BusTypes;
1084
1085 if (!arg)
1086 return -EINVAL;
1087 BusTypes = readl(&host->cfgtable->BusTypes);
1088 if (copy_to_user
1089 (argp, &BusTypes, sizeof(BusTypes_type)))
1090 return -EFAULT;
1091 return 0;
1092 }
1da177e4 1093 case CCISS_GETFIRMVER:
7c832835
BH		 1094 {
1095 FirmwareVer_type firmware;
1da177e4 1096
7c832835
BH		 1097 if (!arg)
1098 return -EINVAL;
1099 memcpy(firmware, host->firm_ver, 4);
1da177e4 1100
7c832835
BH		 1101 if (copy_to_user
1102 (argp, firmware, sizeof(FirmwareVer_type)))
1103 return -EFAULT;
1104 return 0;
1105 }
1106 case CCISS_GETDRIVVER:
1107 {
1108 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1109
7c832835
BH		 1110 if (!arg)
1111 return -EINVAL;
1da177e4 1112
7c832835
BH		 1113 if (copy_to_user
1114 (argp, &DriverVer, sizeof(DriverVer_type)))
1115 return -EFAULT;
1116 return 0;
1117 }
1da177e4 1118
6ae5ce8e
MM		 1119 case CCISS_DEREGDISK:
1120 case CCISS_REGNEWD:
1da177e4 1121 case CCISS_REVALIDVOLS:
6ae5ce8e 1122 return rebuild_lun_table(host, 0);
7c832835
BH		 1123
1124 case CCISS_GETLUNINFO:{
1125 LogvolInfo_struct luninfo;
1126
1127 luninfo.LunID = drv->LunID;
1128 luninfo.num_opens = drv->usage_count;
1129 luninfo.num_parts = 0;
1130 if (copy_to_user(argp, &luninfo,
1131 sizeof(LogvolInfo_struct)))
1132 return -EFAULT;
1133 return 0;
1134 }
1da177e4 1135 case CCISS_PASSTHRU:
1da177e4 1136 {
7c832835
BH		 1137 IOCTL_Command_struct iocommand;
1138 CommandList_struct *c;
1139 char *buff = NULL;
1140 u64bit temp64;
1141 unsigned long flags;
6e9a4738 1142 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1143
7c832835
BH		 1144 if (!arg)
1145 return -EINVAL;
1da177e4 1146
7c832835
BH		 1147 if (!capable(CAP_SYS_RAWIO))
1148 return -EPERM;
1da177e4 1149
7c832835
BH		 1150 if (copy_from_user
1151 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1152 return -EFAULT;
1153 if ((iocommand.buf_size < 1) &&
1154 (iocommand.Request.Type.Direction != XFER_NONE)) {
1155 return -EINVAL;
1156 }
1157#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1158 /* Check kmalloc limits */
1159 if (iocommand.buf_size > 128000)
1160 return -EINVAL;
1161#endif
1162 if (iocommand.buf_size > 0) {
1163 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1164 if (buff == NULL)
1165 return -EFAULT;
1166 }
1167 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1168 /* Copy the data into the buffer we created */
1169 if (copy_from_user
1170 (buff, iocommand.buf, iocommand.buf_size)) {
1171 kfree(buff);
1172 return -EFAULT;
1173 }
1174 } else {
1175 memset(buff, 0, iocommand.buf_size);
1176 }
1177 if ((c = cmd_alloc(host, 0)) == NULL) {
1178 kfree(buff);
1179 return -ENOMEM;
1180 }
1181 // Fill in the command type
1182 c->cmd_type = CMD_IOCTL_PEND;
1183 // Fill in Command Header
1184 c->Header.ReplyQueue = 0; // unused in simple mode
1185 if (iocommand.buf_size > 0) // buffer to fill
1186 {
1187 c->Header.SGList = 1;
1188 c->Header.SGTotal = 1;
1189 } else // no buffers to fill
1190 {
1191 c->Header.SGList = 0;
1192 c->Header.SGTotal = 0;
1193 }
1194 c->Header.LUN = iocommand.LUN_info;
1195 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1196
7c832835
BH		 1197 // Fill in Request block
1198 c->Request = iocommand.Request;
1da177e4 1199
7c832835
BH		 1200 // Fill in the scatter gather information
1201 if (iocommand.buf_size > 0) {
1202 temp64.val = pci_map_single(host->pdev, buff,
1203 iocommand.buf_size,
1204 PCI_DMA_BIDIRECTIONAL);
1205 c->SG[0].Addr.lower = temp64.val32.lower;
1206 c->SG[0].Addr.upper = temp64.val32.upper;
1207 c->SG[0].Len = iocommand.buf_size;
1208 c->SG[0].Ext = 0; // we are not chaining
1209 }
1210 c->waiting = &wait;
1211
1212 /* Put the request on the tail of the request queue */
1213 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1214 addQ(&host->reqQ, c);
1215 host->Qdepth++;
1216 start_io(host);
1217 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1218
1219 wait_for_completion(&wait);
1220
1221 /* unlock the buffers from DMA */
1222 temp64.val32.lower = c->SG[0].Addr.lower;
1223 temp64.val32.upper = c->SG[0].Addr.upper;
1224 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1225 iocommand.buf_size,
1226 PCI_DMA_BIDIRECTIONAL);
1227
0a9279cc
MM		 1228 check_ioctl_unit_attention(host, c);
1229
7c832835
BH		 1230 /* Copy the error information out */
1231 iocommand.error_info = *(c->err_info);
1232 if (copy_to_user
1233 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1234 kfree(buff);
1da177e4
LT		 1235 cmd_free(host, c, 0);
1236 return -EFAULT;
1237 }
7c832835
BH		 1238
1239 if (iocommand.Request.Type.Direction == XFER_READ) {
1240 /* Copy the data out of the buffer we created */
1241 if (copy_to_user
1242 (iocommand.buf, buff, iocommand.buf_size)) {
1243 kfree(buff);
1244 cmd_free(host, c, 0);
1245 return -EFAULT;
1246 }
1247 }
1248 kfree(buff);
1249 cmd_free(host, c, 0);
1250 return 0;
1da177e4 1251 }
7c832835
BH		 1252 case CCISS_BIG_PASSTHRU:{
1253 BIG_IOCTL_Command_struct *ioc;
1254 CommandList_struct *c;
1255 unsigned char **buff = NULL;
1256 int *buff_size = NULL;
1257 u64bit temp64;
1258 unsigned long flags;
1259 BYTE sg_used = 0;
1260 int status = 0;
1261 int i;
6e9a4738 1262 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1263 __u32 left;
1264 __u32 sz;
1265 BYTE __user *data_ptr;
1266
1267 if (!arg)
1268 return -EINVAL;
1269 if (!capable(CAP_SYS_RAWIO))
1270 return -EPERM;
1271 ioc = (BIG_IOCTL_Command_struct *)
1272 kmalloc(sizeof(*ioc), GFP_KERNEL);
1273 if (!ioc) {
1274 status = -ENOMEM;
1275 goto cleanup1;
1276 }
1277 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1278 status = -EFAULT;
1279 goto cleanup1;
1280 }
1281 if ((ioc->buf_size < 1) &&
1282 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1283 status = -EINVAL;
1284 goto cleanup1;
7c832835
BH		 1285 }
1286 /* Check kmalloc limits using all SGs */
1287 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1288 status = -EINVAL;
1289 goto cleanup1;
1290 }
1291 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1292 status = -EINVAL;
1293 goto cleanup1;
1294 }
1295 buff =
1296 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1297 if (!buff) {
1da177e4
LT		 1298 status = -ENOMEM;
1299 goto cleanup1;
1300 }
5cbded58 1301 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1302 GFP_KERNEL);
1303 if (!buff_size) {
1304 status = -ENOMEM;
1305 goto cleanup1;
1306 }
1307 left = ioc->buf_size;
1308 data_ptr = ioc->buf;
1309 while (left) {
1310 sz = (left >
1311 ioc->malloc_size) ? ioc->
1312 malloc_size : left;
1313 buff_size[sg_used] = sz;
1314 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1315 if (buff[sg_used] == NULL) {
1da177e4 1316 status = -ENOMEM;
15534d38
JA		 1317 goto cleanup1;
1318 }
7c832835
BH		 1319 if (ioc->Request.Type.Direction == XFER_WRITE) {
1320 if (copy_from_user
1321 (buff[sg_used], data_ptr, sz)) {
f7108f91 1322 status = -EFAULT;
7c832835
BH		 1323 goto cleanup1;
1324 }
1325 } else {
1326 memset(buff[sg_used], 0, sz);
1327 }
1328 left -= sz;
1329 data_ptr += sz;
1330 sg_used++;
1331 }
1332 if ((c = cmd_alloc(host, 0)) == NULL) {
1333 status = -ENOMEM;
1334 goto cleanup1;
1335 }
1336 c->cmd_type = CMD_IOCTL_PEND;
1337 c->Header.ReplyQueue = 0;
1338
1339 if (ioc->buf_size > 0) {
1340 c->Header.SGList = sg_used;
1341 c->Header.SGTotal = sg_used;
1da177e4 1342 } else {
7c832835
BH		 1343 c->Header.SGList = 0;
1344 c->Header.SGTotal = 0;
1da177e4 1345 }
7c832835
BH		 1346 c->Header.LUN = ioc->LUN_info;
1347 c->Header.Tag.lower = c->busaddr;
1348
1349 c->Request = ioc->Request;
1350 if (ioc->buf_size > 0) {
1351 int i;
1352 for (i = 0; i < sg_used; i++) {
1353 temp64.val =
1354 pci_map_single(host->pdev, buff[i],
1355 buff_size[i],
1356 PCI_DMA_BIDIRECTIONAL);
1357 c->SG[i].Addr.lower =
1358 temp64.val32.lower;
1359 c->SG[i].Addr.upper =
1360 temp64.val32.upper;
1361 c->SG[i].Len = buff_size[i];
1362 c->SG[i].Ext = 0; /* we are not chaining */
1363 }
1364 }
1365 c->waiting = &wait;
1366 /* Put the request on the tail of the request queue */
1367 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1368 addQ(&host->reqQ, c);
1369 host->Qdepth++;
1370 start_io(host);
1371 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1372 wait_for_completion(&wait);
1373 /* unlock the buffers from DMA */
1374 for (i = 0; i < sg_used; i++) {
1375 temp64.val32.lower = c->SG[i].Addr.lower;
1376 temp64.val32.upper = c->SG[i].Addr.upper;
1377 pci_unmap_single(host->pdev,
1378 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1379 PCI_DMA_BIDIRECTIONAL);
1da177e4 1380 }
0a9279cc 1381 check_ioctl_unit_attention(host, c);
7c832835
BH		 1382 /* Copy the error information out */
1383 ioc->error_info = *(c->err_info);
1384 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1385 cmd_free(host, c, 0);
1386 status = -EFAULT;
1387 goto cleanup1;
1388 }
1389 if (ioc->Request.Type.Direction == XFER_READ) {
1390 /* Copy the data out of the buffer we created */
1391 BYTE __user *ptr = ioc->buf;
1392 for (i = 0; i < sg_used; i++) {
1393 if (copy_to_user
1394 (ptr, buff[i], buff_size[i])) {
1395 cmd_free(host, c, 0);
1396 status = -EFAULT;
1397 goto cleanup1;
1398 }
1399 ptr += buff_size[i];
1da177e4 1400 }
1da177e4 1401 }
7c832835
BH		 1402 cmd_free(host, c, 0);
1403 status = 0;
1404 cleanup1:
1405 if (buff) {
1406 for (i = 0; i < sg_used; i++)
1407 kfree(buff[i]);
1408 kfree(buff);
1409 }
1410 kfree(buff_size);
1411 kfree(ioc);
1412 return status;
1da177e4 1413 }
03bbfee5
MMOD		 1414
1415 /* scsi_cmd_ioctl handles these, below, though some are not */
1416 /* very meaningful for cciss. SG_IO is the main one people want. */
1417
1418 case SG_GET_VERSION_NUM:
1419 case SG_SET_TIMEOUT:
1420 case SG_GET_TIMEOUT:
1421 case SG_GET_RESERVED_SIZE:
1422 case SG_SET_RESERVED_SIZE:
1423 case SG_EMULATED_HOST:
1424 case SG_IO:
1425 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1426 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1427
1428 /* scsi_cmd_ioctl would normally handle these, below, but */
1429 /* they aren't a good fit for cciss, as CD-ROMs are */
1430 /* not supported, and we don't have any bus/target/lun */
1431 /* which we present to the kernel. */
1432
1433 case CDROM_SEND_PACKET:
1434 case CDROMCLOSETRAY:
1435 case CDROMEJECT:
1436 case SCSI_IOCTL_GET_IDLUN:
1437 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1438 default:
1439 return -ENOTTY;
1440 }
1da177e4
LT		 1441}
1442
7b30f092
JA		 1443static void cciss_check_queues(ctlr_info_t *h)
1444{
1445 int start_queue = h->next_to_run;
1446 int i;
1447
1448 /* check to see if we have maxed out the number of commands that can
1449 * be placed on the queue. If so then exit. We do this check here
1450 * in case the interrupt we serviced was from an ioctl and did not
1451 * free any new commands.
1452 */
f880632f 1453 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1454 return;
1455
1456 /* We have room on the queue for more commands. Now we need to queue
1457 * them up. We will also keep track of the next queue to run so
1458 * that every queue gets a chance to be started first.
1459 */
1460 for (i = 0; i < h->highest_lun + 1; i++) {
1461 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1462 /* make sure the disk has been added and the drive is real
1463 * because this can be called from the middle of init_one.
1464 */
1465 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1466 continue;
1467 blk_start_queue(h->gendisk[curr_queue]->queue);
1468
1469 /* check to see if we have maxed out the number of commands
1470 * that can be placed on the queue.
1471 */
f880632f 1472 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1473 if (curr_queue == start_queue) {
1474 h->next_to_run =
1475 (start_queue + 1) % (h->highest_lun + 1);
1476 break;
1477 } else {
1478 h->next_to_run = curr_queue;
1479 break;
1480 }
7b30f092
JA		 1481 }
1482 }
1483}
1484
ca1e0484
MM		 1485static void cciss_softirq_done(struct request *rq)
1486{
1487 CommandList_struct *cmd = rq->completion_data;
1488 ctlr_info_t *h = hba[cmd->ctlr];
1489 unsigned long flags;
1490 u64bit temp64;
1491 int i, ddir;
1492
1493 if (cmd->Request.Type.Direction == XFER_READ)
1494 ddir = PCI_DMA_FROMDEVICE;
1495 else
1496 ddir = PCI_DMA_TODEVICE;
1497
1498 /* command did not need to be retried */
1499 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1500 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1501 temp64.val32.lower = cmd->SG[i].Addr.lower;
1502 temp64.val32.upper = cmd->SG[i].Addr.upper;
1503 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1504 }
1505
ca1e0484
MM		 1506#ifdef CCISS_DEBUG
1507 printk("Done with %p\n", rq);
7c832835 1508#endif /* CCISS_DEBUG */
ca1e0484 1509
c3a4d78c 1510 /* set the residual count for pc requests */
ac44e5b2 1511 if (blk_pc_request(rq))
c3a4d78c 1512 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1513
c3a4d78c 1514 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1515
ca1e0484 1516 spin_lock_irqsave(&h->lock, flags);
7c832835 1517 cmd_free(h, cmd, 1);
7b30f092 1518 cciss_check_queues(h);
ca1e0484
MM		 1519 spin_unlock_irqrestore(&h->lock, flags);
1520}
1521
b57695fe 1522static void log_unit_to_scsi3addr(ctlr_info_t *h, unsigned char scsi3addr[],
1523 uint32_t log_unit)
1524{
1525 log_unit = h->drv[log_unit].LunID & 0x03fff;
1526 memset(&scsi3addr[4], 0, 4);
1527 memcpy(&scsi3addr[0], &log_unit, 4);
1528 scsi3addr[3] |= 0x40;
1529}
1530
7fe06326
AP		 1531/* This function gets the SCSI vendor, model, and revision of a logical drive
1532 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1533 * they cannot be read.
1534 */
1535static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1536 char *vendor, char *model, char *rev)
1537{
1538 int rc;
1539 InquiryData_struct *inq_buf;
b57695fe 1540 unsigned char scsi3addr[8];
7fe06326
AP		 1541
1542 *vendor = '\0';
1543 *model = '\0';
1544 *rev = '\0';
1545
1546 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1547 if (!inq_buf)
1548 return;
1549
b57695fe 1550 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1551 if (withirq)
1552 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1553 sizeof(InquiryData_struct), 0,
1554 scsi3addr, TYPE_CMD);
7fe06326
AP		 1555 else
1556 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1557 sizeof(InquiryData_struct), 0,
1558 scsi3addr, TYPE_CMD);
7fe06326
AP		 1559 if (rc == IO_OK) {
1560 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1561 vendor[VENDOR_LEN] = '\0';
1562 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1563 model[MODEL_LEN] = '\0';
1564 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1565 rev[REV_LEN] = '\0';
1566 }
1567
1568 kfree(inq_buf);
1569 return;
1570}
1571
a72da29b
MM		 1572/* This function gets the serial number of a logical drive via
1573 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1574 * number cannot be had, for whatever reason, 16 bytes of 0xff
1575 * are returned instead.
1576 */
1577static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1578 unsigned char *serial_no, int buflen)
1579{
1580#define PAGE_83_INQ_BYTES 64
1581 int rc;
1582 unsigned char *buf;
b57695fe 1583 unsigned char scsi3addr[8];
a72da29b
MM		 1584
1585 if (buflen > 16)
1586 buflen = 16;
1587 memset(serial_no, 0xff, buflen);
1588 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1589 if (!buf)
1590 return;
1591 memset(serial_no, 0, buflen);
b57695fe 1592 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1593 if (withirq)
1594 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1595 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1596 else
1597 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1598 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1599 if (rc == IO_OK)
1600 memcpy(serial_no, &buf[8], buflen);
1601 kfree(buf);
1602 return;
1603}
1604
6ae5ce8e
MM		 1605static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1606 int drv_index)
1607{
1608 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1609 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1610 disk->major = h->major;
1611 disk->first_minor = drv_index << NWD_SHIFT;
1612 disk->fops = &cciss_fops;
1613 disk->private_data = &h->drv[drv_index];
7fe06326 1614 disk->driverfs_dev = &h->drv[drv_index].dev;
6ae5ce8e
MM		 1615
1616 /* Set up queue information */
1617 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1618
1619 /* This is a hardware imposed limit. */
1620 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1621
1622 /* This is a limit in the driver and could be eliminated. */
1623 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1624
1625 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1626
1627 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1628
1629 disk->queue->queuedata = h;
1630
e1defc4f
MP		 1631 blk_queue_logical_block_size(disk->queue,
1632 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1633
1634 /* Make sure all queue data is written out before */
1635 /* setting h->drv[drv_index].queue, as setting this */
1636 /* allows the interrupt handler to start the queue */
1637 wmb();
1638 h->drv[drv_index].queue = disk->queue;
1639 add_disk(disk);
1640}
1641
ddd47442 1642/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1643 * If the usage_count is zero and it is a heretofore unknown drive, or,
1644 * the drive's capacity, geometry, or serial number has changed,
1645 * then the drive information will be updated and the disk will be
1646 * re-registered with the kernel. If these conditions don't hold,
1647 * then it will be left alone for the next reboot. The exception to this
1648 * is disk 0 which will always be left registered with the kernel since it
1649 * is also the controller node. Any changes to disk 0 will show up on
1650 * the next reboot.
7c832835 1651 */
6ae5ce8e 1652static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
7c832835 1653{
ddd47442
MM		 1654 ctlr_info_t *h = hba[ctlr];
1655 struct gendisk *disk;
ddd47442
MM		 1656 InquiryData_struct *inq_buff = NULL;
1657 unsigned int block_size;
00988a35 1658 sector_t total_size;
ddd47442
MM		 1659 unsigned long flags = 0;
1660 int ret = 0;
a72da29b 1661 drive_info_struct *drvinfo;
6ae5ce8e 1662 int was_only_controller_node;
a72da29b
MM		 1663
1664 /* Get information about the disk and modify the driver structure */
1665 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1666 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1667 if (inq_buff == NULL || drvinfo == NULL)
1668 goto mem_msg;
1669
6ae5ce8e
MM		 1670 /* See if we're trying to update the "controller node"
1671 * this will happen the when the first logical drive gets
1672 * created by ACU.
1673 */
1674 was_only_controller_node = (drv_index == 0 &&
1675 h->drv[0].raid_level == -1);
1676
a72da29b
MM		 1677 /* testing to see if 16-byte CDBs are already being used */
1678 if (h->cciss_read == CCISS_READ_16) {
1679 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1680 &total_size, &block_size);
1681
1682 } else {
1683 cciss_read_capacity(ctlr, drv_index, 1,
1684 &total_size, &block_size);
1685
1686 /* if read_capacity returns all F's this volume is >2TB */
1687 /* in size so we switch to 16-byte CDB's for all */
1688 /* read/write ops */
1689 if (total_size == 0xFFFFFFFFULL) {
1690 cciss_read_capacity_16(ctlr, drv_index, 1,
1691 &total_size, &block_size);
1692 h->cciss_read = CCISS_READ_16;
1693 h->cciss_write = CCISS_WRITE_16;
1694 } else {
1695 h->cciss_read = CCISS_READ_10;
1696 h->cciss_write = CCISS_WRITE_10;
1697 }
1698 }
1699
1700 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1701 inq_buff, drvinfo);
1702 drvinfo->block_size = block_size;
1703 drvinfo->nr_blocks = total_size + 1;
1704
7fe06326
AP		 1705 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1706 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1707 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1708 sizeof(drvinfo->serial_no));
1709
1710 /* Is it the same disk we already know, and nothing's changed? */
1711 if (h->drv[drv_index].raid_level != -1 &&
1712 ((memcmp(drvinfo->serial_no,
1713 h->drv[drv_index].serial_no, 16) == 0) &&
1714 drvinfo->block_size == h->drv[drv_index].block_size &&
1715 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1716 drvinfo->heads == h->drv[drv_index].heads &&
1717 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1718 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1719 /* The disk is unchanged, nothing to update */
1720 goto freeret;
a72da29b 1721
6ae5ce8e
MM		 1722 /* If we get here it's not the same disk, or something's changed,
1723 * so we need to * deregister it, and re-register it, if it's not
1724 * in use.
1725 * If the disk already exists then deregister it before proceeding
1726 * (unless it's the first disk (for the controller node).
1727 */
a72da29b
MM		 1728 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1729 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1730 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1731 h->drv[drv_index].busy_configuring = 1;
1732 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1733
6ae5ce8e
MM		 1734 /* deregister_disk sets h->drv[drv_index].queue = NULL
1735 * which keeps the interrupt handler from starting
1736 * the queue.
1737 */
a0ea8622 1738 ret = deregister_disk(h, drv_index, 0);
ddd47442
MM		 1739 h->drv[drv_index].busy_configuring = 0;
1740 }
1741
1742 /* If the disk is in use return */
1743 if (ret)
a72da29b
MM		 1744 goto freeret;
1745
6ae5ce8e
MM		 1746 /* Save the new information from cciss_geometry_inquiry
1747 * and serial number inquiry.
1748 */
a72da29b
MM		 1749 h->drv[drv_index].block_size = drvinfo->block_size;
1750 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1751 h->drv[drv_index].heads = drvinfo->heads;
1752 h->drv[drv_index].sectors = drvinfo->sectors;
1753 h->drv[drv_index].cylinders = drvinfo->cylinders;
1754 h->drv[drv_index].raid_level = drvinfo->raid_level;
1755 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1756 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1757 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1758 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1759
1760 ++h->num_luns;
1761 disk = h->gendisk[drv_index];
1762 set_capacity(disk, h->drv[drv_index].nr_blocks);
1763
6ae5ce8e
MM		 1764 /* If it's not disk 0 (drv_index != 0)
1765 * or if it was disk 0, but there was previously
1766 * no actual corresponding configured logical drive
1767 * (raid_leve == -1) then we want to update the
1768 * logical drive's information.
1769 */
1770 if (drv_index || first_time)
1771 cciss_add_disk(h, disk, drv_index);
ddd47442 1772
6ae5ce8e 1773freeret:
ddd47442 1774 kfree(inq_buff);
a72da29b 1775 kfree(drvinfo);
ddd47442 1776 return;
6ae5ce8e 1777mem_msg:
ddd47442
MM		 1778 printk(KERN_ERR "cciss: out of memory\n");
1779 goto freeret;
1780}
1781
1782/* This function will find the first index of the controllers drive array
1783 * that has a -1 for the raid_level and will return that index. This is
1784 * where new drives will be added. If the index to be returned is greater
1785 * than the highest_lun index for the controller then highest_lun is set
1786 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1787 * "controller_node" is used to know if this is a real logical drive, or just
1788 * the controller node, which determines if this counts towards highest_lun.
7c832835 1789 */
eece695f 1790static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1791{
1792 int i;
1793
7c832835
BH		 1794 for (i = 0; i < CISS_MAX_LUN; i++) {
1795 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1796 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1797 if (!controller_node)
1798 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1799 return i;
1800 }
1801 }
1802 return -1;
1803}
1804
6ae5ce8e
MM		 1805/* cciss_add_gendisk finds a free hba[]->drv structure
1806 * and allocates a gendisk if needed, and sets the lunid
1807 * in the drvinfo structure. It returns the index into
1808 * the ->drv[] array, or -1 if none are free.
1809 * is_controller_node indicates whether highest_lun should
1810 * count this disk, or if it's only being added to provide
1811 * a means to talk to the controller in case no logical
1812 * drives have yet been configured.
1813 */
eece695f 1814static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
6ae5ce8e
MM		 1815{
1816 int drv_index;
1817
eece695f 1818 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1819 if (drv_index == -1)
1820 return -1;
1821 /*Check if the gendisk needs to be allocated */
1822 if (!h->gendisk[drv_index]) {
1823 h->gendisk[drv_index] =
1824 alloc_disk(1 << NWD_SHIFT);
1825 if (!h->gendisk[drv_index]) {
1826 printk(KERN_ERR "cciss%d: could not "
1827 "allocate a new disk %d\n",
1828 h->ctlr, drv_index);
1829 return -1;
1830 }
1831 }
1832 h->drv[drv_index].LunID = lunid;
7fe06326
AP		 1833 if (cciss_create_ld_sysfs_entry(h, &h->drv[drv_index], drv_index))
1834 goto err_free_disk;
6ae5ce8e
MM		 1835
1836 /* Don't need to mark this busy because nobody */
1837 /* else knows about this disk yet to contend */
1838 /* for access to it. */
1839 h->drv[drv_index].busy_configuring = 0;
1840 wmb();
1841 return drv_index;
7fe06326
AP		 1842
1843err_free_disk:
1844 put_disk(h->gendisk[drv_index]);
1845 h->gendisk[drv_index] = NULL;
1846 return -1;
6ae5ce8e
MM		 1847}
1848
1849/* This is for the special case of a controller which
1850 * has no logical drives. In this case, we still need
1851 * to register a disk so the controller can be accessed
1852 * by the Array Config Utility.
1853 */
1854static void cciss_add_controller_node(ctlr_info_t *h)
1855{
1856 struct gendisk *disk;
1857 int drv_index;
1858
1859 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1860 return;
1861
eece695f 1862 drv_index = cciss_add_gendisk(h, 0, 1);
6ae5ce8e
MM		 1863 if (drv_index == -1) {
1864 printk(KERN_WARNING "cciss%d: could not "
1865 "add disk 0.\n", h->ctlr);
1866 return;
1867 }
1868 h->drv[drv_index].block_size = 512;
1869 h->drv[drv_index].nr_blocks = 0;
1870 h->drv[drv_index].heads = 0;
1871 h->drv[drv_index].sectors = 0;
1872 h->drv[drv_index].cylinders = 0;
1873 h->drv[drv_index].raid_level = -1;
1874 memset(h->drv[drv_index].serial_no, 0, 16);
1875 disk = h->gendisk[drv_index];
1876 cciss_add_disk(h, disk, drv_index);
1877}
1878
ddd47442 1879/* This function will add and remove logical drives from the Logical
d14c4ab5 1880 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 1881 * so that mount points are preserved until the next reboot. This allows
1882 * for the removal of logical drives in the middle of the drive array
1883 * without a re-ordering of those drives.
1884 * INPUT
1885 * h = The controller to perform the operations on
7c832835 1886 */
6ae5ce8e 1887static int rebuild_lun_table(ctlr_info_t *h, int first_time)
1da177e4 1888{
ddd47442
MM		 1889 int ctlr = h->ctlr;
1890 int num_luns;
1891 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 1892 int return_code;
1893 int listlength = 0;
1894 int i;
1895 int drv_found;
1896 int drv_index = 0;
1897 __u32 lunid = 0;
1da177e4 1898 unsigned long flags;
ddd47442 1899
6ae5ce8e
MM		 1900 if (!capable(CAP_SYS_RAWIO))
1901 return -EPERM;
1902
ddd47442
MM		 1903 /* Set busy_configuring flag for this operation */
1904 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 1905 if (h->busy_configuring) {
ddd47442
MM		 1906 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1907 return -EBUSY;
1908 }
1909 h->busy_configuring = 1;
a72da29b 1910 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 1911
a72da29b
MM		 1912 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1913 if (ld_buff == NULL)
1914 goto mem_msg;
1915
1916 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 1917 sizeof(ReportLunData_struct),
1918 0, CTLR_LUNID, TYPE_CMD);
ddd47442 1919
a72da29b
MM		 1920 if (return_code == IO_OK)
1921 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
1922 else { /* reading number of logical volumes failed */
1923 printk(KERN_WARNING "cciss: report logical volume"
1924 " command failed\n");
1925 listlength = 0;
1926 goto freeret;
1927 }
1928
1929 num_luns = listlength / 8; /* 8 bytes per entry */
1930 if (num_luns > CISS_MAX_LUN) {
1931 num_luns = CISS_MAX_LUN;
1932 printk(KERN_WARNING "cciss: more luns configured"
1933 " on controller than can be handled by"
1934 " this driver.\n");
1935 }
1936
6ae5ce8e
MM		 1937 if (num_luns == 0)
1938 cciss_add_controller_node(h);
1939
1940 /* Compare controller drive array to driver's drive array
1941 * to see if any drives are missing on the controller due
1942 * to action of Array Config Utility (user deletes drive)
1943 * and deregister logical drives which have disappeared.
1944 */
a72da29b
MM		 1945 for (i = 0; i <= h->highest_lun; i++) {
1946 int j;
1947 drv_found = 0;
d8a0be6a
SC		 1948
1949 /* skip holes in the array from already deleted drives */
1950 if (h->drv[i].raid_level == -1)
1951 continue;
1952
a72da29b
MM		 1953 for (j = 0; j < num_luns; j++) {
1954 memcpy(&lunid, &ld_buff->LUN[j][0], 4);
1955 lunid = le32_to_cpu(lunid);
1956 if (h->drv[i].LunID == lunid) {
1957 drv_found = 1;
1958 break;
1959 }
1960 }
1961 if (!drv_found) {
1962 /* Deregister it from the OS, it's gone. */
1963 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1964 h->drv[i].busy_configuring = 1;
1965 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
a0ea8622 1966 return_code = deregister_disk(h, i, 1);
7fe06326 1967 cciss_destroy_ld_sysfs_entry(&h->drv[i]);
a72da29b 1968 h->drv[i].busy_configuring = 0;
ddd47442 1969 }
a72da29b 1970 }
ddd47442 1971
a72da29b
MM		 1972 /* Compare controller drive array to driver's drive array.
1973 * Check for updates in the drive information and any new drives
1974 * on the controller due to ACU adding logical drives, or changing
1975 * a logical drive's size, etc. Reregister any new/changed drives
1976 */
1977 for (i = 0; i < num_luns; i++) {
1978 int j;
ddd47442 1979
a72da29b 1980 drv_found = 0;
ddd47442 1981
a72da29b
MM		 1982 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
1983 lunid = le32_to_cpu(lunid);
ddd47442 1984
a72da29b
MM		 1985 /* Find if the LUN is already in the drive array
1986 * of the driver. If so then update its info
1987 * if not in use. If it does not exist then find
1988 * the first free index and add it.
1989 */
1990 for (j = 0; j <= h->highest_lun; j++) {
1991 if (h->drv[j].raid_level != -1 &&
1992 h->drv[j].LunID == lunid) {
1993 drv_index = j;
1994 drv_found = 1;
1995 break;
ddd47442 1996 }
a72da29b 1997 }
ddd47442 1998
a72da29b
MM		 1999 /* check if the drive was found already in the array */
2000 if (!drv_found) {
eece695f 2001 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2002 if (drv_index == -1)
2003 goto freeret;
a72da29b 2004 }
6ae5ce8e 2005 cciss_update_drive_info(ctlr, drv_index, first_time);
a72da29b 2006 } /* end for */
ddd47442 2007
6ae5ce8e 2008freeret:
ddd47442
MM		 2009 kfree(ld_buff);
2010 h->busy_configuring = 0;
2011 /* We return -1 here to tell the ACU that we have registered/updated
2012 * all of the drives that we can and to keep it from calling us
2013 * additional times.
7c832835 2014 */
ddd47442 2015 return -1;
6ae5ce8e 2016mem_msg:
ddd47442 2017 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2018 h->busy_configuring = 0;
ddd47442
MM		 2019 goto freeret;
2020}
2021
2022/* This function will deregister the disk and it's queue from the
2023 * kernel. It must be called with the controller lock held and the
2024 * drv structures busy_configuring flag set. It's parameters are:
2025 *
2026 * disk = This is the disk to be deregistered
2027 * drv = This is the drive_info_struct associated with the disk to be
2028 * deregistered. It contains information about the disk used
2029 * by the driver.
2030 * clear_all = This flag determines whether or not the disk information
2031 * is going to be completely cleared out and the highest_lun
2032 * reset. Sometimes we want to clear out information about
d14c4ab5 2033 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2034 * the highest_lun should be left unchanged and the LunID
2035 * should not be cleared.
2036*/
a0ea8622 2037static int deregister_disk(ctlr_info_t *h, int drv_index,
ddd47442
MM		 2038 int clear_all)
2039{
799202cb 2040 int i;
a0ea8622
SC		 2041 struct gendisk *disk;
2042 drive_info_struct *drv;
1da177e4
LT		 2043
2044 if (!capable(CAP_SYS_RAWIO))
2045 return -EPERM;
2046
a0ea8622
SC		 2047 drv = &h->drv[drv_index];
2048 disk = h->gendisk[drv_index];
2049
1da177e4 2050 /* make sure logical volume is NOT is use */
7c832835
BH		 2051 if (clear_all || (h->gendisk[0] == disk)) {
2052 if (drv->usage_count > 1)
2053 return -EBUSY;
2054 } else if (drv->usage_count > 0)
2055 return -EBUSY;
1da177e4 2056
ddd47442
MM		 2057 /* invalidate the devices and deregister the disk. If it is disk
2058 * zero do not deregister it but just zero out it's values. This
2059 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2060 */
2061 if (h->gendisk[0] != disk) {
5a9df732
AB		 2062 struct request_queue *q = disk->queue;
2063 if (disk->flags & GENHD_FL_UP)
2064 del_gendisk(disk);
2065 if (q) {
2066 blk_cleanup_queue(q);
2067 /* Set drv->queue to NULL so that we do not try
2068 * to call blk_start_queue on this queue in the
2069 * interrupt handler
2070 */
2071 drv->queue = NULL;
2072 }
2073 /* If clear_all is set then we are deleting the logical
2074 * drive, not just refreshing its info. For drives
2075 * other than disk 0 we will call put_disk. We do not
2076 * do this for disk 0 as we need it to be able to
2077 * configure the controller.
a72da29b 2078 */
5a9df732
AB		 2079 if (clear_all){
2080 /* This isn't pretty, but we need to find the
2081 * disk in our array and NULL our the pointer.
2082 * This is so that we will call alloc_disk if
2083 * this index is used again later.
a72da29b 2084 */
5a9df732 2085 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2086 if (h->gendisk[i] == disk) {
5a9df732
AB		 2087 h->gendisk[i] = NULL;
2088 break;
799202cb 2089 }
799202cb 2090 }
5a9df732 2091 put_disk(disk);
ddd47442 2092 }
799202cb
MM		 2093 } else {
2094 set_capacity(disk, 0);
ddd47442
MM		 2095 }
2096
2097 --h->num_luns;
2098 /* zero out the disk size info */
2099 drv->nr_blocks = 0;
2100 drv->block_size = 0;
2101 drv->heads = 0;
2102 drv->sectors = 0;
2103 drv->cylinders = 0;
2104 drv->raid_level = -1; /* This can be used as a flag variable to
2105 * indicate that this element of the drive
2106 * array is free.
7c832835
BH		 2107 */
2108
2109 if (clear_all) {
2110 /* check to see if it was the last disk */
2111 if (drv == h->drv + h->highest_lun) {
2112 /* if so, find the new hightest lun */
2113 int i, newhighest = -1;
a72da29b 2114 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2115 /* if the disk has size > 0, it is available */
ddd47442 2116 if (h->drv[i].heads)
7c832835
BH		 2117 newhighest = i;
2118 }
2119 h->highest_lun = newhighest;
1da177e4 2120 }
ddd47442 2121
7c832835 2122 drv->LunID = 0;
ddd47442 2123 }
e2019b58 2124 return 0;
1da177e4 2125}
ddd47442 2126
b57695fe 2127static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2128 size_t size, __u8 page_code, unsigned char *scsi3addr,
2129 int cmd_type)
1da177e4 2130{
7c832835 2131 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2132 u64bit buff_dma_handle;
2133 int status = IO_OK;
2134
2135 c->cmd_type = CMD_IOCTL_PEND;
2136 c->Header.ReplyQueue = 0;
7c832835 2137 if (buff != NULL) {
1da177e4 2138 c->Header.SGList = 1;
7c832835 2139 c->Header.SGTotal = 1;
1da177e4
LT		 2140 } else {
2141 c->Header.SGList = 0;
7c832835 2142 c->Header.SGTotal = 0;
1da177e4
LT		 2143 }
2144 c->Header.Tag.lower = c->busaddr;
b57695fe 2145 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2146
2147 c->Request.Type.Type = cmd_type;
2148 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2149 switch (cmd) {
2150 case CISS_INQUIRY:
1da177e4 2151 /* are we trying to read a vital product page */
7c832835 2152 if (page_code != 0) {
1da177e4
LT		 2153 c->Request.CDB[1] = 0x01;
2154 c->Request.CDB[2] = page_code;
2155 }
2156 c->Request.CDBLen = 6;
7c832835 2157 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2158 c->Request.Type.Direction = XFER_READ;
2159 c->Request.Timeout = 0;
7c832835
BH		 2160 c->Request.CDB[0] = CISS_INQUIRY;
2161 c->Request.CDB[4] = size & 0xFF;
2162 break;
1da177e4
LT		 2163 case CISS_REPORT_LOG:
2164 case CISS_REPORT_PHYS:
7c832835 2165 /* Talking to controller so It's a physical command
1da177e4 2166 mode = 00 target = 0. Nothing to write.
7c832835 2167 */
1da177e4
LT		 2168 c->Request.CDBLen = 12;
2169 c->Request.Type.Attribute = ATTR_SIMPLE;
2170 c->Request.Type.Direction = XFER_READ;
2171 c->Request.Timeout = 0;
2172 c->Request.CDB[0] = cmd;
7c832835 2173 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2174 c->Request.CDB[7] = (size >> 16) & 0xFF;
2175 c->Request.CDB[8] = (size >> 8) & 0xFF;
2176 c->Request.CDB[9] = size & 0xFF;
2177 break;
2178
2179 case CCISS_READ_CAPACITY:
1da177e4
LT		 2180 c->Request.CDBLen = 10;
2181 c->Request.Type.Attribute = ATTR_SIMPLE;
2182 c->Request.Type.Direction = XFER_READ;
2183 c->Request.Timeout = 0;
2184 c->Request.CDB[0] = cmd;
7c832835 2185 break;
00988a35 2186 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2187 c->Request.CDBLen = 16;
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;
2192 c->Request.CDB[1] = 0x10;
2193 c->Request.CDB[10] = (size >> 24) & 0xFF;
2194 c->Request.CDB[11] = (size >> 16) & 0xFF;
2195 c->Request.CDB[12] = (size >> 8) & 0xFF;
2196 c->Request.CDB[13] = size & 0xFF;
2197 c->Request.Timeout = 0;
2198 c->Request.CDB[0] = cmd;
2199 break;
1da177e4
LT		 2200 case CCISS_CACHE_FLUSH:
2201 c->Request.CDBLen = 12;
2202 c->Request.Type.Attribute = ATTR_SIMPLE;
2203 c->Request.Type.Direction = XFER_WRITE;
2204 c->Request.Timeout = 0;
2205 c->Request.CDB[0] = BMIC_WRITE;
2206 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2207 break;
88f627ae 2208 case TEST_UNIT_READY:
88f627ae
SC		 2209 c->Request.CDBLen = 6;
2210 c->Request.Type.Attribute = ATTR_SIMPLE;
2211 c->Request.Type.Direction = XFER_NONE;
2212 c->Request.Timeout = 0;
2213 break;
1da177e4
LT		 2214 default:
2215 printk(KERN_WARNING
7c832835 2216 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2217 return IO_ERROR;
1da177e4
LT		 2218 }
2219 } else if (cmd_type == TYPE_MSG) {
2220 switch (cmd) {
7c832835 2221 case 0: /* ABORT message */
3da8b713 2222 c->Request.CDBLen = 12;
2223 c->Request.Type.Attribute = ATTR_SIMPLE;
2224 c->Request.Type.Direction = XFER_WRITE;
2225 c->Request.Timeout = 0;
7c832835
BH		 2226 c->Request.CDB[0] = cmd; /* abort */
2227 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2228 /* buff contains the tag of the command to abort */
2229 memcpy(&c->Request.CDB[4], buff, 8);
2230 break;
7c832835 2231 case 1: /* RESET message */
88f627ae 2232 c->Request.CDBLen = 16;
3da8b713 2233 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2234 c->Request.Type.Direction = XFER_NONE;
3da8b713 2235 c->Request.Timeout = 0;
2236 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2237 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2238 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2239 break;
1da177e4
LT		 2240 case 3: /* No-Op message */
2241 c->Request.CDBLen = 1;
2242 c->Request.Type.Attribute = ATTR_SIMPLE;
2243 c->Request.Type.Direction = XFER_WRITE;
2244 c->Request.Timeout = 0;
2245 c->Request.CDB[0] = cmd;
2246 break;
2247 default:
2248 printk(KERN_WARNING
7c832835 2249 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2250 return IO_ERROR;
2251 }
2252 } else {
2253 printk(KERN_WARNING
7c832835 2254 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2255 return IO_ERROR;
2256 }
2257 /* Fill in the scatter gather information */
2258 if (size > 0) {
2259 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2260 buff, size,
2261 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2262 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2263 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2264 c->SG[0].Len = size;
7c832835 2265 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2266 }
2267 return status;
2268}
7c832835 2269
5390cfc3 2270static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2271{
5390cfc3 2272 DECLARE_COMPLETION_ONSTACK(wait);
7c832835 2273 u64bit buff_dma_handle;
1da177e4 2274 unsigned long flags;
5390cfc3 2275 int return_status = IO_OK;
7c832835 2276
5390cfc3 2277resend_cmd2:
1da177e4 2278 c->waiting = &wait;
1da177e4 2279 /* Put the request on the tail of the queue and send it */
5390cfc3 2280 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1da177e4
LT		 2281 addQ(&h->reqQ, c);
2282 h->Qdepth++;
2283 start_io(h);
5390cfc3 2284 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
7c832835 2285
1da177e4
LT		 2286 wait_for_completion(&wait);
2287
5390cfc3 2288 if (c->err_info->CommandStatus == 0)
2289 goto command_done;
2290
2291 switch (c->err_info->CommandStatus) {
2292 case CMD_TARGET_STATUS:
2293 printk(KERN_WARNING "cciss: cmd 0x%02x "
2294 "has completed with errors\n", c->Request.CDB[0]);
2295 if (c->err_info->ScsiStatus) {
2296 printk(KERN_WARNING "cciss: cmd 0x%02x "
2297 "has SCSI Status = %x\n",
2298 c->Request.CDB[0], c->err_info->ScsiStatus);
b57695fe 2299 if (c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION)
2300 printk(KERN_WARNING "sense key = 0x%02x\n",
2301 0xf & c->err_info->SenseInfo[2]);
5390cfc3 2302 }
2303 break;
2304 case CMD_DATA_UNDERRUN:
2305 case CMD_DATA_OVERRUN:
2306 /* expected for inquiry and report lun commands */
2307 break;
2308 case CMD_INVALID:
2309 printk(KERN_WARNING "cciss: Cmd 0x%02x is "
2310 "reported invalid\n", c->Request.CDB[0]);
2311 return_status = IO_ERROR;
2312 break;
2313 case CMD_PROTOCOL_ERR:
2314 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2315 "protocol error \n", c->Request.CDB[0]);
2316 return_status = IO_ERROR;
2317 break;
2318 case CMD_HARDWARE_ERR:
2319 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2320 " hardware error\n", c->Request.CDB[0]);
2321 return_status = IO_ERROR;
2322 break;
2323 case CMD_CONNECTION_LOST:
2324 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2325 "connection lost\n", c->Request.CDB[0]);
2326 return_status = IO_ERROR;
2327 break;
2328 case CMD_ABORTED:
2329 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2330 "aborted\n", c->Request.CDB[0]);
2331 return_status = IO_ERROR;
2332 break;
2333 case CMD_ABORT_FAILED:
2334 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2335 "abort failed\n", c->Request.CDB[0]);
2336 return_status = IO_ERROR;
2337 break;
2338 case CMD_UNSOLICITED_ABORT:
2339 printk(KERN_WARNING
2340 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2341 c->Request.CDB[0]);
2342 if (c->retry_count < MAX_CMD_RETRIES) {
7c832835 2343 printk(KERN_WARNING
5390cfc3 2344 "cciss%d: retrying 0x%02x\n", h->ctlr,
2345 c->Request.CDB[0]);
2346 c->retry_count++;
2347 /* erase the old error information */
2348 memset(c->err_info, 0,
2349 sizeof(ErrorInfo_struct));
2350 return_status = IO_OK;
2351 INIT_COMPLETION(wait);
2352 goto resend_cmd2;
1da177e4 2353 }
5390cfc3 2354 return_status = IO_ERROR;
2355 break;
2356 default:
2357 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2358 "unknown status %x\n", c->Request.CDB[0],
2359 c->err_info->CommandStatus);
2360 return_status = IO_ERROR;
7c832835 2361 }
5390cfc3 2362
2363command_done:
1da177e4 2364 /* unlock the buffers from DMA */
bb2a37bf
MM		 2365 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2366 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2367 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2368 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2369 return return_status;
2370}
2371
b57695fe 2372static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2373 __u8 page_code, unsigned char scsi3addr[],
2374 int cmd_type)
5390cfc3 2375{
2376 ctlr_info_t *h = hba[ctlr];
2377 CommandList_struct *c;
2378 int return_status;
2379
2380 c = cmd_alloc(h, 0);
2381 if (!c)
2382 return -ENOMEM;
b57695fe 2383 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2384 scsi3addr, cmd_type);
5390cfc3 2385 if (return_status == IO_OK)
2386 return_status = sendcmd_withirq_core(h, c);
1da177e4 2387 cmd_free(h, c, 0);
7c832835 2388 return return_status;
1da177e4 2389}
7c832835 2390
1da177e4 2391static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2392 int withirq, sector_t total_size,
7c832835
BH		 2393 unsigned int block_size,
2394 InquiryData_struct *inq_buff,
2395 drive_info_struct *drv)
1da177e4
LT		 2396{
2397 int return_code;
00988a35 2398 unsigned long t;
b57695fe 2399 unsigned char scsi3addr[8];
00988a35 2400
1da177e4 2401 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2402 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2403 if (withirq)
2404 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2405 inq_buff, sizeof(*inq_buff),
2406 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2407 else
2408 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2409 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2410 TYPE_CMD);
1da177e4 2411 if (return_code == IO_OK) {
7c832835 2412 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2413 printk(KERN_WARNING
7c832835
BH		 2414 "cciss: reading geometry failed, volume "
2415 "does not support reading geometry\n");
1da177e4 2416 drv->heads = 255;
7c832835 2417 drv->sectors = 32; // Sectors per track
7f42d3b8 2418 drv->cylinders = total_size + 1;
89f97ad1 2419 drv->raid_level = RAID_UNKNOWN;
1da177e4 2420 } else {
1da177e4
LT		 2421 drv->heads = inq_buff->data_byte[6];
2422 drv->sectors = inq_buff->data_byte[7];
2423 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2424 drv->cylinders += inq_buff->data_byte[5];
2425 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2426 }
2427 drv->block_size = block_size;
97c06978 2428 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2429 t = drv->heads * drv->sectors;
2430 if (t > 1) {
97c06978
MMOD		 2431 sector_t real_size = total_size + 1;
2432 unsigned long rem = sector_div(real_size, t);
3f7705ea 2433 if (rem)
97c06978
MMOD		 2434 real_size++;
2435 drv->cylinders = real_size;
1da177e4 2436 }
7c832835 2437 } else { /* Get geometry failed */
1da177e4
LT		 2438 printk(KERN_WARNING "cciss: reading geometry failed\n");
2439 }
cc088d10 2440 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
7c832835 2441 drv->heads, drv->sectors, drv->cylinders);
1da177e4 2442}
7c832835 2443
1da177e4 2444static void
00988a35 2445cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2446 unsigned int *block_size)
1da177e4 2447{
00988a35 2448 ReadCapdata_struct *buf;
1da177e4 2449 int return_code;
b57695fe 2450 unsigned char scsi3addr[8];
1aebe187
MK		 2451
2452 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2453 if (!buf) {
00988a35
MMOD		 2454 printk(KERN_WARNING "cciss: out of memory\n");
2455 return;
2456 }
1aebe187 2457
b57695fe 2458 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2459 if (withirq)
2460 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2461 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2462 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2463 else
2464 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2465 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2466 0, scsi3addr, TYPE_CMD);
1da177e4 2467 if (return_code == IO_OK) {
4c1f2b31
AV		 2468 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2469 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2470 } else { /* read capacity command failed */
1da177e4
LT		 2471 printk(KERN_WARNING "cciss: read capacity failed\n");
2472 *total_size = 0;
2473 *block_size = BLOCK_SIZE;
2474 }
97c06978 2475 if (*total_size != 0)
7b92aadf 2476 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2477 (unsigned long long)*total_size+1, *block_size);
00988a35 2478 kfree(buf);
00988a35
MMOD		 2479}
2480
2481static void
2482cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2483{
2484 ReadCapdata_struct_16 *buf;
2485 int return_code;
b57695fe 2486 unsigned char scsi3addr[8];
1aebe187
MK		 2487
2488 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2489 if (!buf) {
00988a35
MMOD		 2490 printk(KERN_WARNING "cciss: out of memory\n");
2491 return;
2492 }
1aebe187 2493
b57695fe 2494 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2495 if (withirq) {
2496 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2497 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2498 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2499 }
2500 else {
2501 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2502 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2503 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2504 }
2505 if (return_code == IO_OK) {
4c1f2b31
AV		 2506 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2507 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2508 } else { /* read capacity command failed */
2509 printk(KERN_WARNING "cciss: read capacity failed\n");
2510 *total_size = 0;
2511 *block_size = BLOCK_SIZE;
2512 }
7b92aadf 2513 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2514 (unsigned long long)*total_size+1, *block_size);
00988a35 2515 kfree(buf);
1da177e4
LT		 2516}
2517
1da177e4
LT		 2518static int cciss_revalidate(struct gendisk *disk)
2519{
2520 ctlr_info_t *h = get_host(disk);
2521 drive_info_struct *drv = get_drv(disk);
2522 int logvol;
7c832835 2523 int FOUND = 0;
1da177e4 2524 unsigned int block_size;
00988a35 2525 sector_t total_size;
1da177e4
LT		 2526 InquiryData_struct *inq_buff = NULL;
2527
7c832835
BH		 2528 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2529 if (h->drv[logvol].LunID == drv->LunID) {
2530 FOUND = 1;
1da177e4
LT		 2531 break;
2532 }
2533 }
2534
7c832835
BH		 2535 if (!FOUND)
2536 return 1;
1da177e4 2537
7c832835
BH		 2538 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2539 if (inq_buff == NULL) {
2540 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2541 return 1;
2542 }
00988a35
MMOD		 2543 if (h->cciss_read == CCISS_READ_10) {
2544 cciss_read_capacity(h->ctlr, logvol, 1,
2545 &total_size, &block_size);
2546 } else {
2547 cciss_read_capacity_16(h->ctlr, logvol, 1,
2548 &total_size, &block_size);
2549 }
7c832835
BH		 2550 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2551 inq_buff, drv);
1da177e4 2552
e1defc4f 2553 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2554 set_capacity(disk, drv->nr_blocks);
2555
1da177e4
LT		 2556 kfree(inq_buff);
2557 return 0;
2558}
2559
2560/*
2561 * Wait polling for a command to complete.
2562 * The memory mapped FIFO is polled for the completion.
2563 * Used only at init time, interrupts from the HBA are disabled.
2564 */
2565static unsigned long pollcomplete(int ctlr)
2566{
2567 unsigned long done;
2568 int i;
2569
2570 /* Wait (up to 20 seconds) for a command to complete */
2571
2572 for (i = 20 * HZ; i > 0; i--) {
2573 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2574 if (done == FIFO_EMPTY)
2575 schedule_timeout_uninterruptible(1);
2576 else
e2019b58 2577 return done;
1da177e4
LT		 2578 }
2579 /* Invalid address to tell caller we ran out of time */
2580 return 1;
2581}
3da8b713 2582
2583static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
2584{
2585 /* We get in here if sendcmd() is polling for completions
7c832835
BH		 2586 and gets some command back that it wasn't expecting --
2587 something other than that which it just sent down.
2588 Ordinarily, that shouldn't happen, but it can happen when
3da8b713 2589 the scsi tape stuff gets into error handling mode, and
7c832835 2590 starts using sendcmd() to try to abort commands and
3da8b713 2591 reset tape drives. In that case, sendcmd may pick up
2592 completions of commands that were sent to logical drives
7c832835 2593 through the block i/o system, or cciss ioctls completing, etc.
3da8b713 2594 In that case, we need to save those completions for later
2595 processing by the interrupt handler.
7c832835 2596 */
3da8b713 2597
2598#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 2599 struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
3da8b713 2600
2601 /* If it's not the scsi tape stuff doing error handling, (abort */
2602 /* or reset) then we don't expect anything weird. */
2603 if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
2604#endif
7c832835
BH		 2605 printk(KERN_WARNING "cciss cciss%d: SendCmd "
2606 "Invalid command list address returned! (%lx)\n",
2607 ctlr, complete);
3da8b713 2608 /* not much we can do. */
2609#ifdef CONFIG_CISS_SCSI_TAPE
2610 return 1;
2611 }
2612
2613 /* We've sent down an abort or reset, but something else
2614 has completed */
f880632f 2615 if (srl->ncompletions >= (hba[ctlr]->nr_cmds + 2)) {
3da8b713 2616 /* Uh oh. No room to save it for later... */
2617 printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
7c832835 2618 "reject list overflow, command lost!\n", ctlr);
3da8b713 2619 return 1;
2620 }
2621 /* Save it for later */
2622 srl->complete[srl->ncompletions] = complete;
2623 srl->ncompletions++;
2624#endif
2625 return 0;
2626}
2627
4a4b2d76
SC		 2628/* Send command c to controller h and poll for it to complete.
2629 * Turns interrupts off on the board. Used at driver init time
2630 * and during SCSI error recovery.
1da177e4 2631 */
4a4b2d76 2632static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2633{
1da177e4
LT		 2634 int i;
2635 unsigned long complete;
4a4b2d76 2636 int status = IO_ERROR;
1da177e4 2637 u64bit buff_dma_handle;
1da177e4 2638
4a4b2d76
SC		 2639resend_cmd1:
2640
2641 /* Disable interrupt on the board. */
2642 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2643
1da177e4 2644 /* Make sure there is room in the command FIFO */
7c832835 2645 /* Actually it should be completely empty at this time */
3da8b713 2646 /* unless we are in here doing error handling for the scsi */
2647 /* tape side of the driver. */
7c832835 2648 for (i = 200000; i > 0; i--) {
1da177e4 2649 /* if fifo isn't full go */
4a4b2d76 2650 if (!(h->access.fifo_full(h)))
7c832835 2651 break;
7c832835
BH		 2652 udelay(10);
2653 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2654 " waiting!\n", h->ctlr);
7c832835 2655 }
4a4b2d76 2656 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2657 do {
4a4b2d76 2658 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2659
2660#ifdef CCISS_DEBUG
3da8b713 2661 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2662#endif /* CCISS_DEBUG */
1da177e4 2663
3da8b713 2664 if (complete == 1) {
7c832835
BH		 2665 printk(KERN_WARNING
2666 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2667 "No command list address returned!\n", h->ctlr);
3da8b713 2668 status = IO_ERROR;
3da8b713 2669 break;
2670 }
2671
4a4b2d76
SC		 2672 /* If it's not the cmd we're looking for, save it for later */
2673 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
2674 if (add_sendcmd_reject(c->Request.CDB[0],
2675 h->ctlr, complete) != 0)
2676 BUG(); /* we are hosed if we get here. */
2677 continue;
2678 }
2679
2680 /* It is our command. If no error, we're done. */
2681 if (!(complete & CISS_ERROR_BIT)) {
2682 status = IO_OK;
2683 break;
2684 }
2685
2686 /* There is an error... */
2687
2688 /* if data overrun or underun on Report command ignore it */
2689 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2690 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2691 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2692 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2693 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2694 complete = c->busaddr;
2695 status = IO_OK;
2696 break;
1da177e4 2697 }
4a4b2d76
SC		 2698
2699 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2700 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2701 h->ctlr, c);
2702 if (c->retry_count < MAX_CMD_RETRIES) {
2703 printk(KERN_WARNING "cciss%d: retrying %p\n",
2704 h->ctlr, c);
2705 c->retry_count++;
2706 /* erase the old error information */
2707 memset(c->err_info, 0, sizeof(c->err_info));
2708 goto resend_cmd1;
3da8b713 2709 }
4a4b2d76
SC		 2710 printk(KERN_WARNING "cciss%d: retried %p too many "
2711 "times\n", h->ctlr, c);
2712 status = IO_ERROR;
2713 goto cleanup1;
2714 }
2715
2716 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2717 printk(KERN_WARNING "cciss%d: command could not be "
2718 "aborted.\n", h->ctlr);
2719 status = IO_ERROR;
2720 goto cleanup1;
2721 }
2722
2723 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2724 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2725 c->Request.CDB[0], c->err_info->CommandStatus);
2726 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
2727 printk(KERN_WARNING "Target status = 0x%02x\n",
2728 c->err_info->ScsiStatus);
2729 if (c->err_info->ScsiStatus == 2) /* chk cond */
2730 printk(KERN_WARNING "Sense key = 0x%02x\n",
2731 0xf & c->err_info->SenseInfo[2]);
2732 }
2733
2734 status = IO_ERROR;
2735 goto cleanup1;
2736
2737 } while (1);
7c832835 2738
4a4b2d76 2739cleanup1:
1da177e4 2740 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2741 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2742 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2743 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2744 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
3da8b713 2745#ifdef CONFIG_CISS_SCSI_TAPE
2746 /* if we saved some commands for later, process them now. */
4a4b2d76
SC		 2747 if (h->scsi_rejects.ncompletions > 0)
2748 do_cciss_intr(0, h);
3da8b713 2749#endif
4a4b2d76
SC		 2750 return status;
2751}
2752
2753/*
2754 * Send a command to the controller, and wait for it to complete.
2755 * Used at init time, and during SCSI error recovery.
2756 */
2757static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2758 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2759{
2760 CommandList_struct *c;
2761 int status;
2762
2763 c = cmd_alloc(hba[ctlr], 1);
2764 if (!c) {
2765 printk(KERN_WARNING "cciss: unable to get memory");
2766 return IO_ERROR;
2767 }
b57695fe 2768 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2769 scsi3addr, cmd_type);
4a4b2d76
SC		 2770 if (status == IO_OK)
2771 status = sendcmd_core(hba[ctlr], c);
2772 cmd_free(hba[ctlr], c, 1);
e2019b58 2773 return status;
7c832835
BH		 2774}
2775
1da177e4
LT		 2776/*
2777 * Map (physical) PCI mem into (virtual) kernel space
2778 */
2779static void __iomem *remap_pci_mem(ulong base, ulong size)
2780{
7c832835
BH		 2781 ulong page_base = ((ulong) base) & PAGE_MASK;
2782 ulong page_offs = ((ulong) base) - page_base;
2783 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2784
7c832835 2785 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2786}
2787
7c832835
BH		 2788/*
2789 * Takes jobs of the Q and sends them to the hardware, then puts it on
2790 * the Q to wait for completion.
2791 */
2792static void start_io(ctlr_info_t *h)
1da177e4
LT		 2793{
2794 CommandList_struct *c;
7c832835 2795
8a3173de
JA		 2796 while (!hlist_empty(&h->reqQ)) {
2797 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2798 /* can't do anything if fifo is full */
2799 if ((h->access.fifo_full(h))) {
2800 printk(KERN_WARNING "cciss: fifo full\n");
2801 break;
2802 }
2803
7c832835 2804 /* Get the first entry from the Request Q */
8a3173de 2805 removeQ(c);
1da177e4 2806 h->Qdepth--;
7c832835
BH		 2807
2808 /* Tell the controller execute command */
1da177e4 2809 h->access.submit_command(h, c);
7c832835
BH		 2810
2811 /* Put job onto the completed Q */
8a3173de 2812 addQ(&h->cmpQ, c);
1da177e4
LT		 2813 }
2814}
7c832835 2815
1da177e4
LT		 2816/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2817/* Zeros out the error record and then resends the command back */
2818/* to the controller */
7c832835 2819static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2820{
2821 /* erase the old error information */
2822 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2823
2824 /* add it to software queue and then send it to the controller */
8a3173de 2825 addQ(&h->reqQ, c);
1da177e4 2826 h->Qdepth++;
7c832835 2827 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2828 h->maxQsinceinit = h->Qdepth;
2829
2830 start_io(h);
2831}
a9925a06 2832
1a614f50
SC		 2833static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2834 unsigned int msg_byte, unsigned int host_byte,
2835 unsigned int driver_byte)
2836{
2837 /* inverse of macros in scsi.h */
2838 return (scsi_status_byte & 0xff) |
2839 ((msg_byte & 0xff) << 8) |
2840 ((host_byte & 0xff) << 16) |
2841 ((driver_byte & 0xff) << 24);
2842}
2843
0a9279cc
MM		 2844static inline int evaluate_target_status(ctlr_info_t *h,
2845 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2846{
2847 unsigned char sense_key;
1a614f50
SC		 2848 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2849 int error_value;
2850
0a9279cc 2851 *retry_cmd = 0;
1a614f50
SC		 2852 /* If we get in here, it means we got "target status", that is, scsi status */
2853 status_byte = cmd->err_info->ScsiStatus;
2854 driver_byte = DRIVER_OK;
2855 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2856
2857 if (blk_pc_request(cmd->rq))
2858 host_byte = DID_PASSTHROUGH;
2859 else
2860 host_byte = DID_OK;
2861
2862 error_value = make_status_bytes(status_byte, msg_byte,
2863 host_byte, driver_byte);
03bbfee5 2864
1a614f50 2865 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2866 if (!blk_pc_request(cmd->rq))
2867 printk(KERN_WARNING "cciss: cmd %p "
2868 "has SCSI Status 0x%x\n",
2869 cmd, cmd->err_info->ScsiStatus);
1a614f50 2870 return error_value;
03bbfee5
MMOD		 2871 }
2872
2873 /* check the sense key */
2874 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2875 /* no status or recovered error */
1a614f50
SC		 2876 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2877 error_value = 0;
03bbfee5 2878
0a9279cc
MM		 2879 if (check_for_unit_attention(h, cmd)) {
2880 *retry_cmd = !blk_pc_request(cmd->rq);
2881 return 0;
2882 }
2883
03bbfee5 2884 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2885 if (error_value != 0)
03bbfee5
MMOD		 2886 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2887 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2888 return error_value;
03bbfee5
MMOD		 2889 }
2890
2891 /* SG_IO or similar, copy sense data back */
2892 if (cmd->rq->sense) {
2893 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2894 cmd->rq->sense_len = cmd->err_info->SenseLen;
2895 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2896 cmd->rq->sense_len);
2897 } else
2898 cmd->rq->sense_len = 0;
2899
1a614f50 2900 return error_value;
03bbfee5
MMOD		 2901}
2902
7c832835 2903/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 2904 * buffers for the completed job. Note that this function does not need
2905 * to hold the hba/queue lock.
7c832835
BH		 2906 */
2907static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2908 int timeout)
1da177e4 2909{
1da177e4 2910 int retry_cmd = 0;
198b7660
MMOD		 2911 struct request *rq = cmd->rq;
2912
2913 rq->errors = 0;
7c832835 2914
1da177e4 2915 if (timeout)
1a614f50 2916 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 2917
d38ae168
MMOD		 2918 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2919 goto after_error_processing;
7c832835 2920
d38ae168 2921 switch (cmd->err_info->CommandStatus) {
d38ae168 2922 case CMD_TARGET_STATUS:
0a9279cc 2923 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 2924 break;
2925 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 2926 if (blk_fs_request(cmd->rq)) {
2927 printk(KERN_WARNING "cciss: cmd %p has"
2928 " completed with data underrun "
2929 "reported\n", cmd);
c3a4d78c 2930 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 2931 }
d38ae168
MMOD		 2932 break;
2933 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 2934 if (blk_fs_request(cmd->rq))
2935 printk(KERN_WARNING "cciss: cmd %p has"
2936 " completed with data overrun "
2937 "reported\n", cmd);
d38ae168
MMOD		 2938 break;
2939 case CMD_INVALID:
2940 printk(KERN_WARNING "cciss: cmd %p is "
2941 "reported invalid\n", cmd);
1a614f50
SC		 2942 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2943 cmd->err_info->CommandStatus, DRIVER_OK,
2944 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2945 break;
2946 case CMD_PROTOCOL_ERR:
2947 printk(KERN_WARNING "cciss: cmd %p has "
2948 "protocol error \n", cmd);
1a614f50
SC		 2949 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2950 cmd->err_info->CommandStatus, DRIVER_OK,
2951 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2952 break;
2953 case CMD_HARDWARE_ERR:
2954 printk(KERN_WARNING "cciss: cmd %p had "
2955 " hardware error\n", cmd);
1a614f50
SC		 2956 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2957 cmd->err_info->CommandStatus, DRIVER_OK,
2958 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2959 break;
2960 case CMD_CONNECTION_LOST:
2961 printk(KERN_WARNING "cciss: cmd %p had "
2962 "connection lost\n", cmd);
1a614f50
SC		 2963 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2964 cmd->err_info->CommandStatus, DRIVER_OK,
2965 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2966 break;
2967 case CMD_ABORTED:
2968 printk(KERN_WARNING "cciss: cmd %p was "
2969 "aborted\n", cmd);
1a614f50
SC		 2970 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2971 cmd->err_info->CommandStatus, DRIVER_OK,
2972 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 2973 break;
2974 case CMD_ABORT_FAILED:
2975 printk(KERN_WARNING "cciss: cmd %p reports "
2976 "abort failed\n", cmd);
1a614f50
SC		 2977 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2978 cmd->err_info->CommandStatus, DRIVER_OK,
2979 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2980 break;
2981 case CMD_UNSOLICITED_ABORT:
2982 printk(KERN_WARNING "cciss%d: unsolicited "
2983 "abort %p\n", h->ctlr, cmd);
2984 if (cmd->retry_count < MAX_CMD_RETRIES) {
2985 retry_cmd = 1;
2986 printk(KERN_WARNING
2987 "cciss%d: retrying %p\n", h->ctlr, cmd);
2988 cmd->retry_count++;
2989 } else
2990 printk(KERN_WARNING
2991 "cciss%d: %p retried too "
2992 "many times\n", h->ctlr, cmd);
1a614f50
SC		 2993 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2994 cmd->err_info->CommandStatus, DRIVER_OK,
2995 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 2996 break;
2997 case CMD_TIMEOUT:
2998 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 2999 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3000 cmd->err_info->CommandStatus, DRIVER_OK,
3001 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3002 break;
3003 default:
3004 printk(KERN_WARNING "cciss: cmd %p returned "
3005 "unknown status %x\n", cmd,
3006 cmd->err_info->CommandStatus);
1a614f50
SC		 3007 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3008 cmd->err_info->CommandStatus, DRIVER_OK,
3009 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3010 }
d38ae168
MMOD		 3011
3012after_error_processing:
3013
1da177e4 3014 /* We need to return this command */
7c832835
BH		 3015 if (retry_cmd) {
3016 resend_cciss_cmd(h, cmd);
1da177e4 3017 return;
7c832835 3018 }
03bbfee5 3019 cmd->rq->completion_data = cmd;
a9925a06 3020 blk_complete_request(cmd->rq);
1da177e4
LT		 3021}
3022
7c832835
BH		 3023/*
3024 * Get a request and submit it to the controller.
1da177e4 3025 */
165125e1 3026static void do_cciss_request(struct request_queue *q)
1da177e4 3027{
7c832835 3028 ctlr_info_t *h = q->queuedata;
1da177e4 3029 CommandList_struct *c;
00988a35
MMOD		 3030 sector_t start_blk;
3031 int seg;
1da177e4
LT		 3032 struct request *creq;
3033 u64bit temp64;
3034 struct scatterlist tmp_sg[MAXSGENTRIES];
3035 drive_info_struct *drv;
3036 int i, dir;
3037
3038 /* We call start_io here in case there is a command waiting on the
3039 * queue that has not been sent.
7c832835 3040 */
1da177e4
LT		 3041 if (blk_queue_plugged(q))
3042 goto startio;
3043
7c832835 3044 queue:
9934c8c0 3045 creq = blk_peek_request(q);
1da177e4
LT		 3046 if (!creq)
3047 goto startio;
3048
089fe1b2 3049 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3050
7c832835 3051 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3052 goto full;
3053
9934c8c0 3054 blk_start_request(creq);
1da177e4
LT		 3055
3056 spin_unlock_irq(q->queue_lock);
3057
3058 c->cmd_type = CMD_RWREQ;
3059 c->rq = creq;
7c832835
BH		 3060
3061 /* fill in the request */
1da177e4 3062 drv = creq->rq_disk->private_data;
7c832835 3063 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3064 /* got command from pool, so use the command block index instead */
3065 /* for direct lookups. */
3066 /* The first 2 bits are reserved for controller error reporting. */
3067 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835
BH		 3068 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
3069 c->Header.LUN.LogDev.VolId = drv->LunID;
1da177e4 3070 c->Header.LUN.LogDev.Mode = 1;
7c832835
BH		 3071 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3072 c->Request.Type.Type = TYPE_CMD; // It is a command.
3073 c->Request.Type.Attribute = ATTR_SIMPLE;
3074 c->Request.Type.Direction =
a52de245 3075 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3076 c->Request.Timeout = 0; // Don't time out
3077 c->Request.CDB[0] =
00988a35 3078 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3079 start_blk = blk_rq_pos(creq);
1da177e4 3080#ifdef CCISS_DEBUG
83096ebf
TH		 3081 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3082 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3083#endif /* CCISS_DEBUG */
1da177e4 3084
45711f1a 3085 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3086 seg = blk_rq_map_sg(q, creq, tmp_sg);
3087
7c832835 3088 /* get the DMA records for the setup */
1da177e4
LT		 3089 if (c->Request.Type.Direction == XFER_READ)
3090 dir = PCI_DMA_FROMDEVICE;
3091 else
3092 dir = PCI_DMA_TODEVICE;
3093
7c832835 3094 for (i = 0; i < seg; i++) {
1da177e4 3095 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3096 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3097 tmp_sg[i].offset,
3098 tmp_sg[i].length, dir);
1da177e4 3099 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3100 c->SG[i].Addr.upper = temp64.val32.upper;
3101 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3102 }
7c832835
BH		 3103 /* track how many SG entries we are using */
3104 if (seg > h->maxSG)
3105 h->maxSG = seg;
1da177e4
LT		 3106
3107#ifdef CCISS_DEBUG
83096ebf
TH		 3108 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3109 blk_rq_sectors(creq), seg);
7c832835 3110#endif /* CCISS_DEBUG */
1da177e4
LT		 3111
3112 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3113 if (likely(blk_fs_request(creq))) {
3114 if(h->cciss_read == CCISS_READ_10) {
3115 c->Request.CDB[1] = 0;
3116 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3117 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3118 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3119 c->Request.CDB[5] = start_blk & 0xff;
3120 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3121 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3122 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3123 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3124 } else {
582539e5
RD		 3125 u32 upper32 = upper_32_bits(start_blk);
3126
03bbfee5
MMOD		 3127 c->Request.CDBLen = 16;
3128 c->Request.CDB[1]= 0;
582539e5
RD		 3129 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3130 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3131 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3132 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3133 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3134 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3135 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3136 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3137 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3138 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3139 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3140 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3141 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3142 }
3143 } else if (blk_pc_request(creq)) {
3144 c->Request.CDBLen = creq->cmd_len;
3145 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3146 } else {
03bbfee5
MMOD		 3147 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3148 BUG();
00988a35 3149 }
1da177e4
LT		 3150
3151 spin_lock_irq(q->queue_lock);
3152
8a3173de 3153 addQ(&h->reqQ, c);
1da177e4 3154 h->Qdepth++;
7c832835
BH		 3155 if (h->Qdepth > h->maxQsinceinit)
3156 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3157
3158 goto queue;
00988a35 3159full:
1da177e4 3160 blk_stop_queue(q);
00988a35 3161startio:
1da177e4
LT		 3162 /* We will already have the driver lock here so not need
3163 * to lock it.
7c832835 3164 */
1da177e4
LT		 3165 start_io(h);
3166}
3167
3da8b713 3168static inline unsigned long get_next_completion(ctlr_info_t *h)
3169{
3170#ifdef CONFIG_CISS_SCSI_TAPE
3171 /* Any rejects from sendcmd() lying around? Process them first */
3172 if (h->scsi_rejects.ncompletions == 0)
3173 return h->access.command_completed(h);
3174 else {
3175 struct sendcmd_reject_list *srl;
3176 int n;
3177 srl = &h->scsi_rejects;
3178 n = --srl->ncompletions;
3179 /* printk("cciss%d: processing saved reject\n", h->ctlr); */
3180 printk("p");
3181 return srl->complete[n];
3182 }
3183#else
3184 return h->access.command_completed(h);
3185#endif
3186}
3187
3188static inline int interrupt_pending(ctlr_info_t *h)
3189{
3190#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 3191 return (h->access.intr_pending(h)
3da8b713 3192 || (h->scsi_rejects.ncompletions > 0));
3193#else
3194 return h->access.intr_pending(h);
3195#endif
3196}
3197
3198static inline long interrupt_not_for_us(ctlr_info_t *h)
3199{
3200#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 3201 return (((h->access.intr_pending(h) == 0) ||
3202 (h->interrupts_enabled == 0))
3203 && (h->scsi_rejects.ncompletions == 0));
3da8b713 3204#else
7c832835 3205 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3206 (h->interrupts_enabled == 0)));
3207#endif
3208}
3209
7d12e780 3210static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3211{
3212 ctlr_info_t *h = dev_id;
3213 CommandList_struct *c;
3214 unsigned long flags;
33079b21 3215 __u32 a, a1, a2;
1da177e4 3216
3da8b713 3217 if (interrupt_not_for_us(h))
1da177e4 3218 return IRQ_NONE;
1da177e4
LT		 3219 /*
3220 * If there are completed commands in the completion queue,
3221 * we had better do something about it.
3222 */
3223 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3224 while (interrupt_pending(h)) {
7c832835 3225 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3226 a1 = a;
33079b21
MM		 3227 if ((a & 0x04)) {
3228 a2 = (a >> 3);
f880632f 3229 if (a2 >= h->nr_cmds) {
7c832835
BH		 3230 printk(KERN_WARNING
3231 "cciss: controller cciss%d failed, stopping.\n",
3232 h->ctlr);
33079b21
MM		 3233 fail_all_cmds(h->ctlr);
3234 return IRQ_HANDLED;
3235 }
3236
3237 c = h->cmd_pool + a2;
3238 a = c->busaddr;
3239
3240 } else {
8a3173de
JA		 3241 struct hlist_node *tmp;
3242
7c832835 3243 a &= ~3;
8a3173de
JA		 3244 c = NULL;
3245 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3246 if (c->busaddr == a)
7c832835
BH		 3247 break;
3248 }
33079b21 3249 }
1da177e4
LT		 3250 /*
3251 * If we've found the command, take it off the
3252 * completion Q and free it
3253 */
8a3173de
JA		 3254 if (c && c->busaddr == a) {
3255 removeQ(c);
1da177e4
LT		 3256 if (c->cmd_type == CMD_RWREQ) {
3257 complete_command(h, c, 0);
3258 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3259 complete(c->waiting);
3260 }
3261# ifdef CONFIG_CISS_SCSI_TAPE
3262 else if (c->cmd_type == CMD_SCSI)
3263 complete_scsi_command(c, 0, a1);
3264# endif
3265 continue;
3266 }
3267 }
3268 }
3269
1da177e4
LT		 3270 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3271 return IRQ_HANDLED;
3272}
7c832835 3273
0a9279cc
MM		 3274static int scan_thread(void *data)
3275{
3276 ctlr_info_t *h = data;
3277 int rc;
3278 DECLARE_COMPLETION_ONSTACK(wait);
3279 h->rescan_wait = &wait;
3280
3281 for (;;) {
3282 rc = wait_for_completion_interruptible(&wait);
3283 if (kthread_should_stop())
3284 break;
3285 if (!rc)
3286 rebuild_lun_table(h, 0);
3287 }
3288 return 0;
3289}
3290
3291static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3292{
3293 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3294 return 0;
3295
3296 switch (c->err_info->SenseInfo[12]) {
3297 case STATE_CHANGED:
3298 printk(KERN_WARNING "cciss%d: a state change "
3299 "detected, command retried\n", h->ctlr);
3300 return 1;
3301 break;
3302 case LUN_FAILED:
3303 printk(KERN_WARNING "cciss%d: LUN failure "
3304 "detected, action required\n", h->ctlr);
3305 return 1;
3306 break;
3307 case REPORT_LUNS_CHANGED:
3308 printk(KERN_WARNING "cciss%d: report LUN data "
3309 "changed\n", h->ctlr);
3310 if (h->rescan_wait)
3311 complete(h->rescan_wait);
3312 return 1;
3313 break;
3314 case POWER_OR_RESET:
3315 printk(KERN_WARNING "cciss%d: a power on "
3316 "or device reset detected\n", h->ctlr);
3317 return 1;
3318 break;
3319 case UNIT_ATTENTION_CLEARED:
3320 printk(KERN_WARNING "cciss%d: unit attention "
3321 "cleared by another initiator\n", h->ctlr);
3322 return 1;
3323 break;
3324 default:
3325 printk(KERN_WARNING "cciss%d: unknown "
3326 "unit attention detected\n", h->ctlr);
3327 return 1;
3328 }
3329}
3330
7c832835 3331/*
d14c4ab5 3332 * We cannot read the structure directly, for portability we must use
1da177e4 3333 * the io functions.
7c832835 3334 * This is for debug only.
1da177e4
LT		 3335 */
3336#ifdef CCISS_DEBUG
7c832835 3337static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3338{
3339 int i;
3340 char temp_name[17];
3341
3342 printk("Controller Configuration information\n");
3343 printk("------------------------------------\n");
7c832835 3344 for (i = 0; i < 4; i++)
1da177e4 3345 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3346 temp_name[4] = '\0';
3347 printk(" Signature = %s\n", temp_name);
1da177e4 3348 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3349 printk(" Transport methods supported = 0x%x\n",
3350 readl(&(tb->TransportSupport)));
3351 printk(" Transport methods active = 0x%x\n",
3352 readl(&(tb->TransportActive)));
3353 printk(" Requested transport Method = 0x%x\n",
3354 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3355 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3356 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3357 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3358 readl(&(tb->HostWrite.CoalIntCount)));
3359 printk(" Max outstanding commands = 0x%d\n",
3360 readl(&(tb->CmdsOutMax)));
3361 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3362 for (i = 0; i < 16; i++)
1da177e4
LT		 3363 temp_name[i] = readb(&(tb->ServerName[i]));
3364 temp_name[16] = '\0';
3365 printk(" Server Name = %s\n", temp_name);
7c832835 3366 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3367}
7c832835 3368#endif /* CCISS_DEBUG */
1da177e4 3369
7c832835 3370static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3371{
3372 int i, offset, mem_type, bar_type;
7c832835 3373 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3374 return 0;
3375 offset = 0;
7c832835
BH		 3376 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3377 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3378 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3379 offset += 4;
3380 else {
3381 mem_type = pci_resource_flags(pdev, i) &
7c832835 3382 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3383 switch (mem_type) {
7c832835
BH		 3384 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3385 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3386 offset += 4; /* 32 bit */
3387 break;
3388 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3389 offset += 8;
3390 break;
3391 default: /* reserved in PCI 2.2 */
3392 printk(KERN_WARNING
3393 "Base address is invalid\n");
3394 return -1;
1da177e4
LT		 3395 break;
3396 }
3397 }
7c832835
BH		 3398 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3399 return i + 1;
1da177e4
LT		 3400 }
3401 return -1;
3402}
3403
fb86a35b
MM		 3404/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3405 * controllers that are capable. If not, we use IO-APIC mode.
3406 */
3407
7c832835
BH		 3408static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3409 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3410{
3411#ifdef CONFIG_PCI_MSI
7c832835
BH		 3412 int err;
3413 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3414 {0, 2}, {0, 3}
3415 };
fb86a35b
MM		 3416
3417 /* Some boards advertise MSI but don't really support it */
3418 if ((board_id == 0x40700E11) ||
7c832835
BH		 3419 (board_id == 0x40800E11) ||
3420 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3421 goto default_int_mode;
3422
7c832835
BH		 3423 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3424 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3425 if (!err) {
3426 c->intr[0] = cciss_msix_entries[0].vector;
3427 c->intr[1] = cciss_msix_entries[1].vector;
3428 c->intr[2] = cciss_msix_entries[2].vector;
3429 c->intr[3] = cciss_msix_entries[3].vector;
3430 c->msix_vector = 1;
3431 return;
3432 }
3433 if (err > 0) {
3434 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3435 "available\n", err);
1ecb9c0f 3436 goto default_int_mode;
7c832835
BH		 3437 } else {
3438 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3439 err);
1ecb9c0f 3440 goto default_int_mode;
7c832835
BH		 3441 }
3442 }
3443 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3444 if (!pci_enable_msi(pdev)) {
7c832835 3445 c->msi_vector = 1;
7c832835
BH		 3446 } else {
3447 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3448 }
3449 }
1ecb9c0f 3450default_int_mode:
7c832835 3451#endif /* CONFIG_PCI_MSI */
fb86a35b 3452 /* if we get here we're going to use the default interrupt mode */
7c832835 3453 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3454 return;
3455}
3456
7d1fd970 3457static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3458{
3459 ushort subsystem_vendor_id, subsystem_device_id, command;
3460 __u32 board_id, scratchpad = 0;
3461 __u64 cfg_offset;
3462 __u32 cfg_base_addr;
3463 __u64 cfg_base_addr_index;
c33ac89b 3464 int i, err;
1da177e4
LT		 3465
3466 /* check to see if controller has been disabled */
3467 /* BEFORE trying to enable it */
7c832835
BH		 3468 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3469 if (!(command & 0x02)) {
3470 printk(KERN_WARNING
3471 "cciss: controller appears to be disabled\n");
c33ac89b 3472 return -ENODEV;
1da177e4
LT		 3473 }
3474
c33ac89b 3475 err = pci_enable_device(pdev);
7c832835 3476 if (err) {
1da177e4 3477 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3478 return err;
1da177e4 3479 }
1da177e4 3480
4e570309
BH		 3481 err = pci_request_regions(pdev, "cciss");
3482 if (err) {
3483 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3484 "aborting\n");
872225ca 3485 return err;
4e570309
BH		 3486 }
3487
1da177e4
LT		 3488 subsystem_vendor_id = pdev->subsystem_vendor;
3489 subsystem_device_id = pdev->subsystem_device;
3490 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3491 subsystem_vendor_id);
1da177e4 3492
1da177e4
LT		 3493#ifdef CCISS_DEBUG
3494 printk("command = %x\n", command);
3495 printk("irq = %x\n", pdev->irq);
3496 printk("board_id = %x\n", board_id);
7c832835 3497#endif /* CCISS_DEBUG */
1da177e4 3498
fb86a35b
MM		 3499/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3500 * else we use the IO-APIC interrupt assigned to us by system ROM.
3501 */
3502 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3503
e1438581
MM		 3504 /* find the memory BAR */
3505 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3506 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3507 break;
3508 }
3509 if (i == DEVICE_COUNT_RESOURCE) {
3510 printk(KERN_WARNING "cciss: No memory BAR found\n");
3511 err = -ENODEV;
3512 goto err_out_free_res;
3513 }
3514
3515 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3516 * already removed
3517 */
1da177e4 3518
1da177e4 3519#ifdef CCISS_DEBUG
9f92f471 3520 printk("address 0 = %lx\n", c->paddr);
7c832835 3521#endif /* CCISS_DEBUG */
a5b92873 3522 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3523
3524 /* Wait for the board to become ready. (PCI hotplug needs this.)
3525 * We poll for up to 120 secs, once per 100ms. */
7c832835 3526 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3527 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3528 if (scratchpad == CCISS_FIRMWARE_READY)
3529 break;
3530 set_current_state(TASK_INTERRUPTIBLE);
7c832835 3531 schedule_timeout(HZ / 10); /* wait 100ms */
1da177e4
LT		 3532 }
3533 if (scratchpad != CCISS_FIRMWARE_READY) {
3534 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3535 err = -ENODEV;
4e570309 3536 goto err_out_free_res;
1da177e4
LT		 3537 }
3538
3539 /* get the address index number */
3540 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3541 cfg_base_addr &= (__u32) 0x0000ffff;
3542#ifdef CCISS_DEBUG
3543 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3544#endif /* CCISS_DEBUG */
3545 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3546#ifdef CCISS_DEBUG
9f92f471
RD		 3547 printk("cfg base address index = %llx\n",
3548 (unsigned long long)cfg_base_addr_index);
7c832835 3549#endif /* CCISS_DEBUG */
1da177e4
LT		 3550 if (cfg_base_addr_index == -1) {
3551 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3552 err = -ENODEV;
4e570309 3553 goto err_out_free_res;
1da177e4
LT		 3554 }
3555
3556 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3557#ifdef CCISS_DEBUG
9f92f471 3558 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3559#endif /* CCISS_DEBUG */
3560 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3561 cfg_base_addr_index) +
3562 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3563 c->board_id = board_id;
3564
3565#ifdef CCISS_DEBUG
945f390f 3566 print_cfg_table(c->cfgtable);
7c832835 3567#endif /* CCISS_DEBUG */
1da177e4 3568
49153998
MM		 3569 /* Some controllers support Zero Memory Raid (ZMR).
3570 * When configured in ZMR mode the number of supported
3571 * commands drops to 64. So instead of just setting an
3572 * arbitrary value we make the driver a little smarter.
3573 * We read the config table to tell us how many commands
3574 * are supported on the controller then subtract 4 to
3575 * leave a little room for ioctl calls.
3576 */
3577 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3578 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3579 if (board_id == products[i].board_id) {
3580 c->product_name = products[i].product_name;
3581 c->access = *(products[i].access);
49153998 3582 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3583 break;
3584 }
3585 }
7c832835
BH		 3586 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3587 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3588 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3589 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3590 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3591 err = -ENODEV;
4e570309 3592 goto err_out_free_res;
1da177e4 3593 }
4ff9a9a4
MM		 3594 /* We didn't find the controller in our list. We know the
3595 * signature is valid. If it's an HP device let's try to
3596 * bind to the device and fire it up. Otherwise we bail.
3597 */
3598 if (i == ARRAY_SIZE(products)) {
3599 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3600 c->product_name = products[i-1].product_name;
3601 c->access = *(products[i-1].access);
49153998 3602 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3603 printk(KERN_WARNING "cciss: This is an unknown "
3604 "Smart Array controller.\n"
3605 "cciss: Please update to the latest driver "
3606 "available from www.hp.com.\n");
3607 } else {
3608 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3609 " to access the Smart Array controller %08lx\n"
3610 , (unsigned long)board_id);
3611 err = -ENODEV;
3612 goto err_out_free_res;
3613 }
3614 }
1da177e4 3615#ifdef CONFIG_X86
7c832835
BH		 3616 {
3617 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3618 __u32 prefetch;
3619 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3620 prefetch |= 0x100;
3621 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3622 }
1da177e4
LT		 3623#endif
3624
8bf50f71
MMOD		 3625 /* Disabling DMA prefetch and refetch for the P600.
3626 * An ASIC bug may result in accesses to invalid memory addresses.
3627 * We've disabled prefetch for some time now. Testing with XEN
3628 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3629 */
3630 if(board_id == 0x3225103C) {
3631 __u32 dma_prefetch;
8bf50f71 3632 __u32 dma_refetch;
f92e2f5f
MM		 3633 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3634 dma_prefetch |= 0x8000;
3635 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3636 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3637 dma_refetch |= 0x1;
3638 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3639 }
3640
1da177e4
LT		 3641#ifdef CCISS_DEBUG
3642 printk("Trying to put board into Simple mode\n");
7c832835 3643#endif /* CCISS_DEBUG */
1da177e4 3644 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3645 /* Update the field, and then ring the doorbell */
3646 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3647 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3648
3649 /* under certain very rare conditions, this can take awhile.
3650 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3651 * as we enter this code.) */
7c832835 3652 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3653 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3654 break;
3655 /* delay and try again */
3656 set_current_state(TASK_INTERRUPTIBLE);
3657 schedule_timeout(10);
7c832835 3658 }
1da177e4
LT		 3659
3660#ifdef CCISS_DEBUG
7c832835
BH		 3661 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3662 readl(c->vaddr + SA5_DOORBELL));
3663#endif /* CCISS_DEBUG */
1da177e4 3664#ifdef CCISS_DEBUG
7c832835
BH		 3665 print_cfg_table(c->cfgtable);
3666#endif /* CCISS_DEBUG */
1da177e4 3667
7c832835 3668 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3669 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3670 " simple mode\n");
c33ac89b 3671 err = -ENODEV;
4e570309 3672 goto err_out_free_res;
1da177e4
LT		 3673 }
3674 return 0;
3675
5faad620 3676err_out_free_res:
872225ca
MM		 3677 /*
3678 * Deliberately omit pci_disable_device(): it does something nasty to
3679 * Smart Array controllers that pci_enable_device does not undo
3680 */
4e570309 3681 pci_release_regions(pdev);
c33ac89b 3682 return err;
1da177e4
LT		 3683}
3684
6ae5ce8e
MM		 3685/* Function to find the first free pointer into our hba[] array
3686 * Returns -1 if no free entries are left.
7c832835 3687 */
1da177e4
LT		 3688static int alloc_cciss_hba(void)
3689{
799202cb 3690 int i;
1da177e4 3691
7c832835 3692 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3693 if (!hba[i]) {
3694 ctlr_info_t *p;
f2912a12 3695
06ff37ff 3696 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3697 if (!p)
3698 goto Enomem;
1da177e4
LT		 3699 hba[i] = p;
3700 return i;
3701 }
3702 }
3703 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3704 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3705 return -1;
3706Enomem:
1da177e4 3707 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3708 return -1;
3709}
3710
3711static void free_hba(int i)
3712{
3713 ctlr_info_t *p = hba[i];
3714 int n;
3715
3716 hba[i] = NULL;
799202cb 3717 for (n = 0; n < CISS_MAX_LUN; n++)
1da177e4
LT		 3718 put_disk(p->gendisk[n]);
3719 kfree(p);
3720}
3721
82eb03cf
CC		 3722/* Send a message CDB to the firmware. */
3723static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3724{
3725 typedef struct {
3726 CommandListHeader_struct CommandHeader;
3727 RequestBlock_struct Request;
3728 ErrDescriptor_struct ErrorDescriptor;
3729 } Command;
3730 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3731 Command *cmd;
3732 dma_addr_t paddr64;
3733 uint32_t paddr32, tag;
3734 void __iomem *vaddr;
3735 int i, err;
3736
3737 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3738 if (vaddr == NULL)
3739 return -ENOMEM;
3740
3741 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3742 CCISS commands, so they must be allocated from the lower 4GiB of
3743 memory. */
e930438c 3744 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3745 if (err) {
3746 iounmap(vaddr);
3747 return -ENOMEM;
3748 }
3749
3750 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3751 if (cmd == NULL) {
3752 iounmap(vaddr);
3753 return -ENOMEM;
3754 }
3755
3756 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3757 although there's no guarantee, we assume that the address is at
3758 least 4-byte aligned (most likely, it's page-aligned). */
3759 paddr32 = paddr64;
3760
3761 cmd->CommandHeader.ReplyQueue = 0;
3762 cmd->CommandHeader.SGList = 0;
3763 cmd->CommandHeader.SGTotal = 0;
3764 cmd->CommandHeader.Tag.lower = paddr32;
3765 cmd->CommandHeader.Tag.upper = 0;
3766 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3767
3768 cmd->Request.CDBLen = 16;
3769 cmd->Request.Type.Type = TYPE_MSG;
3770 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3771 cmd->Request.Type.Direction = XFER_NONE;
3772 cmd->Request.Timeout = 0; /* Don't time out */
3773 cmd->Request.CDB[0] = opcode;
3774 cmd->Request.CDB[1] = type;
3775 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3776
3777 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3778 cmd->ErrorDescriptor.Addr.upper = 0;
3779 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3780
3781 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3782
3783 for (i = 0; i < 10; i++) {
3784 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3785 if ((tag & ~3) == paddr32)
3786 break;
3787 schedule_timeout_uninterruptible(HZ);
3788 }
3789
3790 iounmap(vaddr);
3791
3792 /* we leak the DMA buffer here ... no choice since the controller could
3793 still complete the command. */
3794 if (i == 10) {
3795 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3796 opcode, type);
3797 return -ETIMEDOUT;
3798 }
3799
3800 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3801
3802 if (tag & 2) {
3803 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3804 opcode, type);
3805 return -EIO;
3806 }
3807
3808 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
3809 opcode, type);
3810 return 0;
3811}
3812
3813#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
3814#define cciss_noop(p) cciss_message(p, 3, 0)
3815
3816static __devinit int cciss_reset_msi(struct pci_dev *pdev)
3817{
3818/* the #defines are stolen from drivers/pci/msi.h. */
3819#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
3820#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
3821
3822 int pos;
3823 u16 control = 0;
3824
3825 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3826 if (pos) {
3827 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3828 if (control & PCI_MSI_FLAGS_ENABLE) {
3829 printk(KERN_INFO "cciss: resetting MSI\n");
3830 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
3831 }
3832 }
3833
3834 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3835 if (pos) {
3836 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3837 if (control & PCI_MSIX_FLAGS_ENABLE) {
3838 printk(KERN_INFO "cciss: resetting MSI-X\n");
3839 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
3840 }
3841 }
3842
3843 return 0;
3844}
3845
3846/* This does a hard reset of the controller using PCI power management
3847 * states. */
3848static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
3849{
3850 u16 pmcsr, saved_config_space[32];
3851 int i, pos;
3852
3853 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
3854
3855 /* This is very nearly the same thing as
3856
3857 pci_save_state(pci_dev);
3858 pci_set_power_state(pci_dev, PCI_D3hot);
3859 pci_set_power_state(pci_dev, PCI_D0);
3860 pci_restore_state(pci_dev);
3861
3862 but we can't use these nice canned kernel routines on
3863 kexec, because they also check the MSI/MSI-X state in PCI
3864 configuration space and do the wrong thing when it is
3865 set/cleared. Also, the pci_save/restore_state functions
3866 violate the ordering requirements for restoring the
3867 configuration space from the CCISS document (see the
3868 comment below). So we roll our own .... */
3869
3870 for (i = 0; i < 32; i++)
3871 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
3872
3873 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3874 if (pos == 0) {
3875 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
3876 return -ENODEV;
3877 }
3878
3879 /* Quoting from the Open CISS Specification: "The Power
3880 * Management Control/Status Register (CSR) controls the power
3881 * state of the device. The normal operating state is D0,
3882 * CSR=00h. The software off state is D3, CSR=03h. To reset
3883 * the controller, place the interface device in D3 then to
3884 * D0, this causes a secondary PCI reset which will reset the
3885 * controller." */
3886
3887 /* enter the D3hot power management state */
3888 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3889 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3890 pmcsr |= PCI_D3hot;
3891 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3892
3893 schedule_timeout_uninterruptible(HZ >> 1);
3894
3895 /* enter the D0 power management state */
3896 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3897 pmcsr |= PCI_D0;
3898 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3899
3900 schedule_timeout_uninterruptible(HZ >> 1);
3901
3902 /* Restore the PCI configuration space. The Open CISS
3903 * Specification says, "Restore the PCI Configuration
3904 * Registers, offsets 00h through 60h. It is important to
3905 * restore the command register, 16-bits at offset 04h,
3906 * last. Do not restore the configuration status register,
3907 * 16-bits at offset 06h." Note that the offset is 2*i. */
3908 for (i = 0; i < 32; i++) {
3909 if (i == 2 || i == 3)
3910 continue;
3911 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
3912 }
3913 wmb();
3914 pci_write_config_word(pdev, 4, saved_config_space[2]);
3915
3916 return 0;
3917}
3918
1da177e4
LT		 3919/*
3920 * This is it. Find all the controllers and register them. I really hate
3921 * stealing all these major device numbers.
3922 * returns the number of block devices registered.
3923 */
3924static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 3925 const struct pci_device_id *ent)
1da177e4 3926{
1da177e4 3927 int i;
799202cb 3928 int j = 0;
1da177e4 3929 int rc;
22bece00
MM		 3930 int dac, return_code;
3931 InquiryData_struct *inq_buff = NULL;
1da177e4 3932
82eb03cf
CC		 3933 if (reset_devices) {
3934 /* Reset the controller with a PCI power-cycle */
3935 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
3936 return -ENODEV;
3937
5e18cfd0
JA		 3938 /* Now try to get the controller to respond to a no-op. Some
3939 devices (notably the HP Smart Array 5i Controller) need
3940 up to 30 seconds to respond. */
5e4c91c8 3941 for (i=0; i<30; i++) {
82eb03cf
CC		 3942 if (cciss_noop(pdev) == 0)
3943 break;
5e4c91c8
JA		 3944
3945 schedule_timeout_uninterruptible(HZ);
3946 }
3947 if (i == 30) {
3948 printk(KERN_ERR "cciss: controller seems dead\n");
3949 return -EBUSY;
82eb03cf
CC		 3950 }
3951 }
3952
1da177e4 3953 i = alloc_cciss_hba();
7c832835 3954 if (i < 0)
e2019b58 3955 return -1;
1f8ef380
MM		 3956
3957 hba[i]->busy_initializing = 1;
8a3173de
JA		 3958 INIT_HLIST_HEAD(&hba[i]->cmpQ);
3959 INIT_HLIST_HEAD(&hba[i]->reqQ);
1f8ef380 3960
1da177e4 3961 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 3962 goto clean0;
1da177e4
LT		 3963
3964 sprintf(hba[i]->devname, "cciss%d", i);
3965 hba[i]->ctlr = i;
3966 hba[i]->pdev = pdev;
3967
7fe06326
AP		 3968 if (cciss_create_hba_sysfs_entry(hba[i]))
3969 goto clean0;
3970
1da177e4 3971 /* configure PCI DMA stuff */
6a35528a 3972 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 3973 dac = 1;
284901a9 3974 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 3975 dac = 0;
1da177e4 3976 else {
40aabb58 3977 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 3978 goto clean1;
3979 }
3980
3981 /*
3982 * register with the major number, or get a dynamic major number
3983 * by passing 0 as argument. This is done for greater than
3984 * 8 controller support.
3985 */
3986 if (i < MAX_CTLR_ORIG)
564de74a 3987 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 3988 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 3989 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 3990 printk(KERN_ERR
7c832835
BH		 3991 "cciss: Unable to get major number %d for %s "
3992 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 3993 goto clean1;
7c832835 3994 } else {
1da177e4
LT		 3995 if (i >= MAX_CTLR_ORIG)
3996 hba[i]->major = rc;
3997 }
3998
3999 /* make sure the board interrupts are off */
4000 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4001 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4002 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4003 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4004 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4005 goto clean2;
4006 }
40aabb58
BH		 4007
4008 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4009 hba[i]->devname, pdev->device, pci_name(pdev),
4010 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4011
4012 hba[i]->cmd_pool_bits =
061837bc
JL		 4013 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4014 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4015 hba[i]->cmd_pool = (CommandList_struct *)
4016 pci_alloc_consistent(hba[i]->pdev,
f880632f 4017 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4018 &(hba[i]->cmd_pool_dhandle));
4019 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4020 pci_alloc_consistent(hba[i]->pdev,
f880632f 4021 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4022 &(hba[i]->errinfo_pool_dhandle));
4023 if ((hba[i]->cmd_pool_bits == NULL)
4024 || (hba[i]->cmd_pool == NULL)
4025 || (hba[i]->errinfo_pool == NULL)) {
4026 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4027 goto clean4;
4028 }
3da8b713 4029#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4030 hba[i]->scsi_rejects.complete =
4031 kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
f880632f 4032 (hba[i]->nr_cmds + 5), GFP_KERNEL);
3da8b713 4033 if (hba[i]->scsi_rejects.complete == NULL) {
7c832835 4034 printk(KERN_ERR "cciss: out of memory");
3da8b713 4035 goto clean4;
4036 }
4037#endif
1da177e4 4038 spin_lock_init(&hba[i]->lock);
1da177e4 4039
7c832835
BH		 4040 /* Initialize the pdev driver private data.
4041 have it point to hba[i]. */
1da177e4 4042 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4043 /* command and error info recs zeroed out before
4044 they are used */
4045 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4046 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4047 * sizeof(unsigned long));
1da177e4 4048
6ae5ce8e
MM		 4049 hba[i]->num_luns = 0;
4050 hba[i]->highest_lun = -1;
4051 for (j = 0; j < CISS_MAX_LUN; j++) {
4052 hba[i]->drv[j].raid_level = -1;
4053 hba[i]->drv[j].queue = NULL;
4054 hba[i]->gendisk[j] = NULL;
4055 }
1da177e4
LT		 4056
4057 cciss_scsi_setup(i);
4058
4059 /* Turn the interrupts on so we can service requests */
4060 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4061
22bece00
MM		 4062 /* Get the firmware version */
4063 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4064 if (inq_buff == NULL) {
4065 printk(KERN_ERR "cciss: out of memory\n");
4066 goto clean4;
4067 }
4068
4069 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4070 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4071 if (return_code == IO_OK) {
4072 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4073 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4074 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4075 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4076 } else { /* send command failed */
4077 printk(KERN_WARNING "cciss: unable to determine firmware"
4078 " version of controller\n");
4079 }
4080
1da177e4 4081 cciss_procinit(i);
92c4231a
MM		 4082
4083 hba[i]->cciss_max_sectors = 2048;
4084
d6dbf42e 4085 hba[i]->busy_initializing = 0;
1da177e4 4086
6ae5ce8e 4087 rebuild_lun_table(hba[i], 1);
0a9279cc
MM		 4088 hba[i]->cciss_scan_thread = kthread_run(scan_thread, hba[i],
4089 "cciss_scan%02d", i);
4090 if (IS_ERR(hba[i]->cciss_scan_thread))
4091 return PTR_ERR(hba[i]->cciss_scan_thread);
4092
e2019b58 4093 return 1;
1da177e4 4094
6ae5ce8e 4095clean4:
22bece00 4096 kfree(inq_buff);
3da8b713 4097#ifdef CONFIG_CISS_SCSI_TAPE
1acc0b0b 4098 kfree(hba[i]->scsi_rejects.complete);
3da8b713 4099#endif
6044ec88 4100 kfree(hba[i]->cmd_pool_bits);
7c832835 4101 if (hba[i]->cmd_pool)
1da177e4 4102 pci_free_consistent(hba[i]->pdev,
f880632f 4103 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4104 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4105 if (hba[i]->errinfo_pool)
1da177e4 4106 pci_free_consistent(hba[i]->pdev,
f880632f 4107 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4108 hba[i]->errinfo_pool,
4109 hba[i]->errinfo_pool_dhandle);
fb86a35b 4110 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4111clean2:
1da177e4 4112 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4113clean1:
7fe06326
AP		 4114 cciss_destroy_hba_sysfs_entry(hba[i]);
4115clean0:
1f8ef380 4116 hba[i]->busy_initializing = 0;
799202cb
MM		 4117 /* cleanup any queues that may have been initialized */
4118 for (j=0; j <= hba[i]->highest_lun; j++){
4119 drive_info_struct *drv = &(hba[i]->drv[j]);
4120 if (drv->queue)
4121 blk_cleanup_queue(drv->queue);
4122 }
872225ca
MM		 4123 /*
4124 * Deliberately omit pci_disable_device(): it does something nasty to
4125 * Smart Array controllers that pci_enable_device does not undo
4126 */
799202cb 4127 pci_release_regions(pdev);
799202cb 4128 pci_set_drvdata(pdev, NULL);
61808c2b 4129 free_hba(i);
e2019b58 4130 return -1;
1da177e4
LT		 4131}
4132
e9ca75b5 4133static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4134{
4135 ctlr_info_t *tmp_ptr;
e9ca75b5 4136 int i;
1da177e4 4137 char flush_buf[4];
7c832835 4138 int return_code;
1da177e4 4139
e9ca75b5
GB		 4140 tmp_ptr = pci_get_drvdata(pdev);
4141 if (tmp_ptr == NULL)
4142 return;
4143 i = tmp_ptr->ctlr;
4144 if (hba[i] == NULL)
4145 return;
4146
4147 /* Turn board interrupts off and send the flush cache command */
4148 /* sendcmd will turn off interrupt, and send the flush...
4149 * To write all data in the battery backed cache to disks */
4150 memset(flush_buf, 0, 4);
b57695fe 4151 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4152 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4153 if (return_code == IO_OK) {
4154 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4155 } else {
4156 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4157 }
4158 free_irq(hba[i]->intr[2], hba[i]);
4159}
4160
4161static void __devexit cciss_remove_one(struct pci_dev *pdev)
4162{
4163 ctlr_info_t *tmp_ptr;
4164 int i, j;
4165
7c832835
BH		 4166 if (pci_get_drvdata(pdev) == NULL) {
4167 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4168 return;
4169 }
0a9279cc 4170
1da177e4
LT		 4171 tmp_ptr = pci_get_drvdata(pdev);
4172 i = tmp_ptr->ctlr;
7c832835 4173 if (hba[i] == NULL) {
1da177e4 4174 printk(KERN_ERR "cciss: device appears to "
7c832835 4175 "already be removed \n");
1da177e4
LT		 4176 return;
4177 }
b6550777 4178
0a9279cc
MM		 4179 kthread_stop(hba[i]->cciss_scan_thread);
4180
b6550777
BH		 4181 remove_proc_entry(hba[i]->devname, proc_cciss);
4182 unregister_blkdev(hba[i]->major, hba[i]->devname);
4183
4184 /* remove it from the disk list */
4185 for (j = 0; j < CISS_MAX_LUN; j++) {
4186 struct gendisk *disk = hba[i]->gendisk[j];
4187 if (disk) {
165125e1 4188 struct request_queue *q = disk->queue;
b6550777
BH		 4189
4190 if (disk->flags & GENHD_FL_UP)
4191 del_gendisk(disk);
4192 if (q)
4193 blk_cleanup_queue(q);
4194 }
4195 }
4196
ba198efb 4197#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4198 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4199#endif
b6550777 4200
e9ca75b5 4201 cciss_shutdown(pdev);
fb86a35b
MM		 4202
4203#ifdef CONFIG_PCI_MSI
7c832835
BH		 4204 if (hba[i]->msix_vector)
4205 pci_disable_msix(hba[i]->pdev);
4206 else if (hba[i]->msi_vector)
4207 pci_disable_msi(hba[i]->pdev);
4208#endif /* CONFIG_PCI_MSI */
fb86a35b 4209
1da177e4 4210 iounmap(hba[i]->vaddr);
1da177e4 4211
f880632f 4212 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4213 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4214 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4215 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4216 kfree(hba[i]->cmd_pool_bits);
3da8b713 4217#ifdef CONFIG_CISS_SCSI_TAPE
4218 kfree(hba[i]->scsi_rejects.complete);
4219#endif
872225ca
MM		 4220 /*
4221 * Deliberately omit pci_disable_device(): it does something nasty to
4222 * Smart Array controllers that pci_enable_device does not undo
4223 */
7c832835 4224 pci_release_regions(pdev);
4e570309 4225 pci_set_drvdata(pdev, NULL);
7fe06326 4226 cciss_destroy_hba_sysfs_entry(hba[i]);
1da177e4 4227 free_hba(i);
7c832835 4228}
1da177e4
LT		 4229
4230static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4231 .name = "cciss",
4232 .probe = cciss_init_one,
4233 .remove = __devexit_p(cciss_remove_one),
4234 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4235 .shutdown = cciss_shutdown,
1da177e4
LT		 4236};
4237
4238/*
4239 * This is it. Register the PCI driver information for the cards we control
7c832835 4240 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4241 */
4242static int __init cciss_init(void)
4243{
7fe06326
AP		 4244 int err;
4245
10cbda97
JA		 4246 /*
4247 * The hardware requires that commands are aligned on a 64-bit
4248 * boundary. Given that we use pci_alloc_consistent() to allocate an
4249 * array of them, the size must be a multiple of 8 bytes.
4250 */
4251 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4252
1da177e4
LT		 4253 printk(KERN_INFO DRIVER_NAME "\n");
4254
7fe06326
AP		 4255 err = bus_register(&cciss_bus_type);
4256 if (err)
4257 return err;
4258
1da177e4 4259 /* Register for our PCI devices */
7fe06326
AP		 4260 err = pci_register_driver(&cciss_pci_driver);
4261 if (err)
4262 goto err_bus_register;
4263
4264 return 0;
4265
4266err_bus_register:
4267 bus_unregister(&cciss_bus_type);
4268 return err;
1da177e4
LT		 4269}
4270
4271static void __exit cciss_cleanup(void)
4272{
4273 int i;
4274
4275 pci_unregister_driver(&cciss_pci_driver);
4276 /* double check that all controller entrys have been removed */
7c832835
BH		 4277 for (i = 0; i < MAX_CTLR; i++) {
4278 if (hba[i] != NULL) {
1da177e4 4279 printk(KERN_WARNING "cciss: had to remove"
7c832835 4280 " controller %d\n", i);
1da177e4
LT		 4281 cciss_remove_one(hba[i]->pdev);
4282 }
4283 }
928b4d8c 4284 remove_proc_entry("driver/cciss", NULL);
7fe06326 4285 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4286}
4287
33079b21
MM		 4288static void fail_all_cmds(unsigned long ctlr)
4289{
4290 /* If we get here, the board is apparently dead. */
4291 ctlr_info_t *h = hba[ctlr];
4292 CommandList_struct *c;
4293 unsigned long flags;
4294
4295 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4296 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4297
4298 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4299
7c832835 4300 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4301
4302 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4303 while (!hlist_empty(&h->reqQ)) {
4304 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4305 removeQ(c);
33079b21 4306 h->Qdepth--;
8a3173de 4307 addQ(&h->cmpQ, c);
33079b21
MM		 4308 }
4309
4310 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4311 while (!hlist_empty(&h->cmpQ)) {
4312 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4313 removeQ(c);
33079b21
MM		 4314 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4315 if (c->cmd_type == CMD_RWREQ) {
4316 complete_command(h, c, 0);
4317 } else if (c->cmd_type == CMD_IOCTL_PEND)
4318 complete(c->waiting);
4319#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4320 else if (c->cmd_type == CMD_SCSI)
4321 complete_scsi_command(c, 0, 0);
33079b21
MM		 4322#endif
4323 }
4324 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4325 return;
4326}
4327
1da177e4
LT		 4328module_init(cciss_init);
4329module_exit(cciss_cleanup);
Linux kernel - Deliverables
This page took 0.778511 seconds and 5 git commands to generate.