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cciss: Don't check h->busy_initializing in cciss_open().
[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>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1da177e4
LT		 44#include <asm/uaccess.h>
45#include <asm/io.h>
46
eb0df996 47#include <linux/dma-mapping.h>
1da177e4
LT		 48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/completion.h>
d5d3b736 51#include <scsi/scsi.h>
03bbfee5
MMOD		 52#include <scsi/sg.h>
53#include <scsi/scsi_ioctl.h>
54#include <linux/cdrom.h>
231bc2a2 55#include <linux/scatterlist.h>
0a9279cc 56#include <linux/kthread.h>
1da177e4
LT		 57
58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 61
62/* Embedded module documentation macros - see modules.h */
63MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68MODULE_VERSION("3.6.20");
1da177e4
LT		 69MODULE_LICENSE("GPL");
70
71#include "cciss_cmd.h"
72#include "cciss.h"
73#include <linux/cciss_ioctl.h>
74
75/* define the PCI info for the cards we can control */
76static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 104 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
105 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 106 {0,}
107};
7c832835 108
1da177e4
LT		 109MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
110
1da177e4
LT		 111/* board_id = Subsystem Device ID & Vendor ID
112 * product = Marketing Name for the board
7c832835 113 * access = Address of the struct of function pointers
1da177e4
LT		 114 */
115static struct board_type products[] = {
49153998
MM		 116 {0x40700E11, "Smart Array 5300", &SA5_access},
117 {0x40800E11, "Smart Array 5i", &SA5B_access},
118 {0x40820E11, "Smart Array 532", &SA5B_access},
119 {0x40830E11, "Smart Array 5312", &SA5B_access},
120 {0x409A0E11, "Smart Array 641", &SA5_access},
121 {0x409B0E11, "Smart Array 642", &SA5_access},
122 {0x409C0E11, "Smart Array 6400", &SA5_access},
123 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
124 {0x40910E11, "Smart Array 6i", &SA5_access},
125 {0x3225103C, "Smart Array P600", &SA5_access},
126 {0x3223103C, "Smart Array P800", &SA5_access},
127 {0x3234103C, "Smart Array P400", &SA5_access},
128 {0x3235103C, "Smart Array P400i", &SA5_access},
129 {0x3211103C, "Smart Array E200i", &SA5_access},
130 {0x3212103C, "Smart Array E200", &SA5_access},
131 {0x3213103C, "Smart Array E200i", &SA5_access},
132 {0x3214103C, "Smart Array E200i", &SA5_access},
133 {0x3215103C, "Smart Array E200i", &SA5_access},
134 {0x3237103C, "Smart Array E500", &SA5_access},
135 {0x323D103C, "Smart Array P700m", &SA5_access},
136 {0x3241103C, "Smart Array P212", &SA5_access},
137 {0x3243103C, "Smart Array P410", &SA5_access},
138 {0x3245103C, "Smart Array P410i", &SA5_access},
139 {0x3247103C, "Smart Array P411", &SA5_access},
140 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 141 {0x324A103C, "Smart Array P712m", &SA5_access},
142 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 143 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 144};
145
d14c4ab5 146/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 147#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 148#define MAX_IOCTL_CONFIG_WAIT 1000
149
150/*define how many times we will try a command because of bus resets */
151#define MAX_CMD_RETRIES 3
152
1da177e4
LT		 153#define MAX_CTLR 32
154
155/* Originally cciss driver only supports 8 major numbers */
156#define MAX_CTLR_ORIG 8
157
1da177e4
LT		 158static ctlr_info_t *hba[MAX_CTLR];
159
b368c9dd
AP		 160static struct task_struct *cciss_scan_thread;
161static DEFINE_MUTEX(scan_mutex);
162static LIST_HEAD(scan_q);
163
165125e1 164static void do_cciss_request(struct request_queue *q);
7d12e780 165static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 166static int cciss_open(struct block_device *bdev, fmode_t mode);
167static int cciss_release(struct gendisk *disk, fmode_t mode);
168static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 169 unsigned int cmd, unsigned long arg);
a885c8c4 170static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 171
1da177e4 172static int cciss_revalidate(struct gendisk *disk);
2d11d993 173static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 174static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 175 int clear_all, int via_ioctl);
1da177e4 176
00988a35
MMOD		 177static void cciss_read_capacity(int ctlr, int logvol, int withirq,
178 sector_t *total_size, unsigned int *block_size);
179static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
180 sector_t *total_size, unsigned int *block_size);
181static void cciss_geometry_inquiry(int ctlr, int logvol,
182 int withirq, sector_t total_size,
183 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 184 drive_info_struct *drv);
7c832835
BH		 185static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
186 __u32);
187static void start_io(ctlr_info_t *h);
188static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
7c832835
BH		 189 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
190static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 191 __u8 page_code, unsigned char scsi3addr[],
192 int cmd_type);
85cc61ae 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
194 int attempt_retry);
195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 196
33079b21 197static void fail_all_cmds(unsigned long ctlr);
d6f4965d 198static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 199static int scan_thread(void *data);
200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 201static void cciss_hba_release(struct device *dev);
202static void cciss_device_release(struct device *dev);
361e9b07 203static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
33079b21 204
1da177e4 205#ifdef CONFIG_PROC_FS
1da177e4
LT		 206static void cciss_procinit(int i);
207#else
7c832835
BH		 208static void cciss_procinit(int i)
209{
210}
211#endif /* CONFIG_PROC_FS */
1da177e4
LT		 212
213#ifdef CONFIG_COMPAT
ef7822c2
AV		 214static int cciss_compat_ioctl(struct block_device *, fmode_t,
215 unsigned, unsigned long);
1da177e4
LT		 216#endif
217
83d5cde4 218static const struct block_device_operations cciss_fops = {
7c832835 219 .owner = THIS_MODULE,
ef7822c2
AV		 220 .open = cciss_open,
221 .release = cciss_release,
222 .locked_ioctl = cciss_ioctl,
7c832835 223 .getgeo = cciss_getgeo,
1da177e4 224#ifdef CONFIG_COMPAT
ef7822c2 225 .compat_ioctl = cciss_compat_ioctl,
1da177e4 226#endif
7c832835 227 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 228};
229
230/*
231 * Enqueuing and dequeuing functions for cmdlists.
232 */
8a3173de 233static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 234{
8a3173de 235 hlist_add_head(&c->list, list);
1da177e4
LT		 236}
237
8a3173de 238static inline void removeQ(CommandList_struct *c)
1da177e4 239{
b59e64d0
HR		 240 /*
241 * After kexec/dump some commands might still
242 * be in flight, which the firmware will try
243 * to complete. Resetting the firmware doesn't work
244 * with old fw revisions, so we have to mark
245 * them off as 'stale' to prevent the driver from
246 * falling over.
247 */
248 if (WARN_ON(hlist_unhashed(&c->list))) {
249 c->cmd_type = CMD_MSG_STALE;
8a3173de 250 return;
b59e64d0 251 }
8a3173de
JA		 252
253 hlist_del_init(&c->list);
1da177e4
LT		 254}
255
256#include "cciss_scsi.c" /* For SCSI tape support */
257
0f5486ec
RD		 258#define RAID_UNKNOWN 6
259
1da177e4
LT		 260#ifdef CONFIG_PROC_FS
261
262/*
263 * Report information about this controller.
264 */
265#define ENG_GIG 1000000000
266#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 267#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 268static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
269 "UNKNOWN"
270};
1da177e4
LT		 271
272static struct proc_dir_entry *proc_cciss;
273
89b6e743 274static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 275{
89b6e743
MM		 276 ctlr_info_t *h = seq->private;
277
278 seq_printf(seq, "%s: HP %s Controller\n"
279 "Board ID: 0x%08lx\n"
280 "Firmware Version: %c%c%c%c\n"
281 "IRQ: %d\n"
282 "Logical drives: %d\n"
283 "Current Q depth: %d\n"
284 "Current # commands on controller: %d\n"
285 "Max Q depth since init: %d\n"
286 "Max # commands on controller since init: %d\n"
287 "Max SG entries since init: %d\n",
288 h->devname,
289 h->product_name,
290 (unsigned long)h->board_id,
291 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
292 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
293 h->num_luns,
294 h->Qdepth, h->commands_outstanding,
295 h->maxQsinceinit, h->max_outstanding, h->maxSG);
296
297#ifdef CONFIG_CISS_SCSI_TAPE
298 cciss_seq_tape_report(seq, h->ctlr);
299#endif /* CONFIG_CISS_SCSI_TAPE */
300}
1da177e4 301
89b6e743
MM		 302static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
303{
304 ctlr_info_t *h = seq->private;
305 unsigned ctlr = h->ctlr;
306 unsigned long flags;
1da177e4
LT		 307
308 /* prevent displaying bogus info during configuration
309 * or deconfiguration of a logical volume
310 */
311 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
312 if (h->busy_configuring) {
313 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 314 return ERR_PTR(-EBUSY);
1da177e4
LT		 315 }
316 h->busy_configuring = 1;
317 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
318
89b6e743
MM		 319 if (*pos == 0)
320 cciss_seq_show_header(seq);
321
322 return pos;
323}
324
325static int cciss_seq_show(struct seq_file *seq, void *v)
326{
327 sector_t vol_sz, vol_sz_frac;
328 ctlr_info_t *h = seq->private;
329 unsigned ctlr = h->ctlr;
330 loff_t *pos = v;
331 drive_info_struct *drv = &h->drv[*pos];
332
333 if (*pos > h->highest_lun)
334 return 0;
335
336 if (drv->heads == 0)
337 return 0;
338
339 vol_sz = drv->nr_blocks;
340 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
341 vol_sz_frac *= 100;
342 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
343
344 if (drv->raid_level > 5)
345 drv->raid_level = RAID_UNKNOWN;
346 seq_printf(seq, "cciss/c%dd%d:"
347 "\t%4u.%02uGB\tRAID %s\n",
348 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
349 raid_label[drv->raid_level]);
350 return 0;
351}
352
353static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
354{
355 ctlr_info_t *h = seq->private;
356
357 if (*pos > h->highest_lun)
358 return NULL;
359 *pos += 1;
360
361 return pos;
362}
363
364static void cciss_seq_stop(struct seq_file *seq, void *v)
365{
366 ctlr_info_t *h = seq->private;
367
368 /* Only reset h->busy_configuring if we succeeded in setting
369 * it during cciss_seq_start. */
370 if (v == ERR_PTR(-EBUSY))
371 return;
7c832835 372
1da177e4 373 h->busy_configuring = 0;
1da177e4
LT		 374}
375
88e9d34c 376static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 377 .start = cciss_seq_start,
378 .show = cciss_seq_show,
379 .next = cciss_seq_next,
380 .stop = cciss_seq_stop,
381};
382
383static int cciss_seq_open(struct inode *inode, struct file *file)
384{
385 int ret = seq_open(file, &cciss_seq_ops);
386 struct seq_file *seq = file->private_data;
387
388 if (!ret)
389 seq->private = PDE(inode)->data;
390
391 return ret;
392}
393
394static ssize_t
395cciss_proc_write(struct file *file, const char __user *buf,
396 size_t length, loff_t *ppos)
1da177e4 397{
89b6e743
MM		 398 int err;
399 char *buffer;
400
401#ifndef CONFIG_CISS_SCSI_TAPE
402 return -EINVAL;
1da177e4
LT		 403#endif
404
89b6e743 405 if (!buf || length > PAGE_SIZE - 1)
7c832835 406 return -EINVAL;
89b6e743
MM		 407
408 buffer = (char *)__get_free_page(GFP_KERNEL);
409 if (!buffer)
410 return -ENOMEM;
411
412 err = -EFAULT;
413 if (copy_from_user(buffer, buf, length))
414 goto out;
415 buffer[length] = '\0';
416
417#ifdef CONFIG_CISS_SCSI_TAPE
418 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
419 struct seq_file *seq = file->private_data;
420 ctlr_info_t *h = seq->private;
421 int rc;
422
7c832835
BH		 423 rc = cciss_engage_scsi(h->ctlr);
424 if (rc != 0)
89b6e743
MM		 425 err = -rc;
426 else
427 err = length;
428 } else
429#endif /* CONFIG_CISS_SCSI_TAPE */
430 err = -EINVAL;
7c832835
BH		 431 /* might be nice to have "disengage" too, but it's not
432 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 433
434out:
435 free_page((unsigned long)buffer);
436 return err;
1da177e4
LT		 437}
438
89b6e743
MM		 439static struct file_operations cciss_proc_fops = {
440 .owner = THIS_MODULE,
441 .open = cciss_seq_open,
442 .read = seq_read,
443 .llseek = seq_lseek,
444 .release = seq_release,
445 .write = cciss_proc_write,
446};
447
1da177e4
LT		 448static void __devinit cciss_procinit(int i)
449{
450 struct proc_dir_entry *pde;
451
89b6e743 452 if (proc_cciss == NULL)
928b4d8c 453 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 454 if (!proc_cciss)
455 return;
3dfcf9c4 456 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 457 S_IROTH, proc_cciss,
3dfcf9c4 458 &cciss_proc_fops, hba[i]);
1da177e4 459}
7c832835 460#endif /* CONFIG_PROC_FS */
1da177e4 461
7fe06326
AP		 462#define MAX_PRODUCT_NAME_LEN 19
463
464#define to_hba(n) container_of(n, struct ctlr_info, dev)
7fe06326 465
d6f4965d
AP		 466static ssize_t host_store_rescan(struct device *dev,
467 struct device_attribute *attr,
468 const char *buf, size_t count)
469{
470 struct ctlr_info *h = to_hba(dev);
471
472 add_to_scan_list(h);
473 wake_up_process(cciss_scan_thread);
474 wait_for_completion_interruptible(&h->scan_wait);
475
476 return count;
477}
478DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 479
480static ssize_t dev_show_unique_id(struct device *dev,
481 struct device_attribute *attr,
482 char *buf)
483{
617e1344
SC		 484 drive_info_struct *drv = dev_get_drvdata(dev);
485 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 486 __u8 sn[16];
487 unsigned long flags;
488 int ret = 0;
489
490 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
491 if (h->busy_configuring)
492 ret = -EBUSY;
493 else
494 memcpy(sn, drv->serial_no, sizeof(sn));
495 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
496
497 if (ret)
498 return ret;
499 else
500 return snprintf(buf, 16 * 2 + 2,
501 "%02X%02X%02X%02X%02X%02X%02X%02X"
502 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
503 sn[0], sn[1], sn[2], sn[3],
504 sn[4], sn[5], sn[6], sn[7],
505 sn[8], sn[9], sn[10], sn[11],
506 sn[12], sn[13], sn[14], sn[15]);
507}
508DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
509
510static ssize_t dev_show_vendor(struct device *dev,
511 struct device_attribute *attr,
512 char *buf)
513{
617e1344
SC		 514 drive_info_struct *drv = dev_get_drvdata(dev);
515 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 516 char vendor[VENDOR_LEN + 1];
517 unsigned long flags;
518 int ret = 0;
519
520 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
521 if (h->busy_configuring)
522 ret = -EBUSY;
523 else
524 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
525 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
526
527 if (ret)
528 return ret;
529 else
530 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
531}
532DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
533
534static ssize_t dev_show_model(struct device *dev,
535 struct device_attribute *attr,
536 char *buf)
537{
617e1344
SC		 538 drive_info_struct *drv = dev_get_drvdata(dev);
539 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 540 char model[MODEL_LEN + 1];
541 unsigned long flags;
542 int ret = 0;
543
544 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
545 if (h->busy_configuring)
546 ret = -EBUSY;
547 else
548 memcpy(model, drv->model, MODEL_LEN + 1);
549 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
550
551 if (ret)
552 return ret;
553 else
554 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
555}
556DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
557
558static ssize_t dev_show_rev(struct device *dev,
559 struct device_attribute *attr,
560 char *buf)
561{
617e1344
SC		 562 drive_info_struct *drv = dev_get_drvdata(dev);
563 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 564 char rev[REV_LEN + 1];
565 unsigned long flags;
566 int ret = 0;
567
568 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
569 if (h->busy_configuring)
570 ret = -EBUSY;
571 else
572 memcpy(rev, drv->rev, REV_LEN + 1);
573 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
574
575 if (ret)
576 return ret;
577 else
578 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
579}
580DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
581
d6f4965d
AP		 582static struct attribute *cciss_host_attrs[] = {
583 &dev_attr_rescan.attr,
584 NULL
585};
586
587static struct attribute_group cciss_host_attr_group = {
588 .attrs = cciss_host_attrs,
589};
590
591static struct attribute_group *cciss_host_attr_groups[] = {
592 &cciss_host_attr_group,
593 NULL
594};
595
596static struct device_type cciss_host_type = {
597 .name = "cciss_host",
598 .groups = cciss_host_attr_groups,
617e1344 599 .release = cciss_hba_release,
d6f4965d
AP		 600};
601
7fe06326
AP		 602static struct attribute *cciss_dev_attrs[] = {
603 &dev_attr_unique_id.attr,
604 &dev_attr_model.attr,
605 &dev_attr_vendor.attr,
606 &dev_attr_rev.attr,
607 NULL
608};
609
610static struct attribute_group cciss_dev_attr_group = {
611 .attrs = cciss_dev_attrs,
612};
613
a4dbd674 614static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 615 &cciss_dev_attr_group,
616 NULL
617};
618
619static struct device_type cciss_dev_type = {
620 .name = "cciss_device",
621 .groups = cciss_dev_attr_groups,
617e1344 622 .release = cciss_device_release,
7fe06326
AP		 623};
624
625static struct bus_type cciss_bus_type = {
626 .name = "cciss",
627};
628
617e1344
SC		 629/*
630 * cciss_hba_release is called when the reference count
631 * of h->dev goes to zero.
632 */
633static void cciss_hba_release(struct device *dev)
634{
635 /*
636 * nothing to do, but need this to avoid a warning
637 * about not having a release handler from lib/kref.c.
638 */
639}
7fe06326
AP		 640
641/*
642 * Initialize sysfs entry for each controller. This sets up and registers
643 * the 'cciss#' directory for each individual controller under
644 * /sys/bus/pci/devices/<dev>/.
645 */
646static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
647{
648 device_initialize(&h->dev);
649 h->dev.type = &cciss_host_type;
650 h->dev.bus = &cciss_bus_type;
651 dev_set_name(&h->dev, "%s", h->devname);
652 h->dev.parent = &h->pdev->dev;
653
654 return device_add(&h->dev);
655}
656
657/*
658 * Remove sysfs entries for an hba.
659 */
660static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
661{
662 device_del(&h->dev);
617e1344
SC		 663 put_device(&h->dev); /* final put. */
664}
665
666/* cciss_device_release is called when the reference count
667 * of h->drv[x].dev goes to zero.
668 */
669static void cciss_device_release(struct device *dev)
670{
671 kfree(dev);
7fe06326
AP		 672}
673
674/*
675 * Initialize sysfs for each logical drive. This sets up and registers
676 * the 'c#d#' directory for each individual logical drive under
677 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
678 * /sys/block/cciss!c#d# to this entry.
679 */
617e1344 680static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 681 int drv_index)
682{
617e1344
SC		 683 struct device *dev;
684
8ce51966
SC		 685 /* Special case for c*d0, we only create it once. */
686 if (drv_index == 0 && h->drv[drv_index].dev != NULL)
687 return 0;
688
617e1344
SC		 689 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
690 if (!dev)
691 return -ENOMEM;
692 device_initialize(dev);
693 dev->type = &cciss_dev_type;
694 dev->bus = &cciss_bus_type;
695 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
696 dev->parent = &h->dev;
697 h->drv[drv_index].dev = dev;
698 dev_set_drvdata(dev, &h->drv[drv_index]);
699 return device_add(dev);
7fe06326
AP		 700}
701
702/*
703 * Remove sysfs entries for a logical drive.
704 */
8ce51966
SC		 705static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
706 int ctlr_exiting)
7fe06326 707{
617e1344 708 struct device *dev = h->drv[drv_index].dev;
8ce51966
SC		 709
710 /* special case for c*d0, we only destroy it on controller exit */
711 if (drv_index == 0 && !ctlr_exiting)
712 return;
713
617e1344
SC		 714 device_del(dev);
715 put_device(dev); /* the "final" put. */
716 h->drv[drv_index].dev = NULL;
7fe06326
AP		 717}
718
7c832835
BH		 719/*
720 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 721 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 722 * which ones are free or in use. For operations that can wait for kmalloc
723 * to possible sleep, this routine can be called with get_from_pool set to 0.
724 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
725 */
726static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 727{
728 CommandList_struct *c;
7c832835 729 int i;
1da177e4
LT		 730 u64bit temp64;
731 dma_addr_t cmd_dma_handle, err_dma_handle;
732
7c832835
BH		 733 if (!get_from_pool) {
734 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
735 sizeof(CommandList_struct), &cmd_dma_handle);
736 if (c == NULL)
737 return NULL;
1da177e4
LT		 738 memset(c, 0, sizeof(CommandList_struct));
739
33079b21
MM		 740 c->cmdindex = -1;
741
7c832835
BH		 742 c->err_info = (ErrorInfo_struct *)
743 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
744 &err_dma_handle);
745
746 if (c->err_info == NULL) {
747 pci_free_consistent(h->pdev,
1da177e4
LT		 748 sizeof(CommandList_struct), c, cmd_dma_handle);
749 return NULL;
750 }
751 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 752 } else { /* get it out of the controllers pool */
753
754 do {
f880632f
MM		 755 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
756 if (i == h->nr_cmds)
7c832835
BH		 757 return NULL;
758 } while (test_and_set_bit
759 (i & (BITS_PER_LONG - 1),
760 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 761#ifdef CCISS_DEBUG
762 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
763#endif
7c832835 764 c = h->cmd_pool + i;
1da177e4 765 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 766 cmd_dma_handle = h->cmd_pool_dhandle
767 + i * sizeof(CommandList_struct);
1da177e4
LT		 768 c->err_info = h->errinfo_pool + i;
769 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 770 err_dma_handle = h->errinfo_pool_dhandle
771 + i * sizeof(ErrorInfo_struct);
772 h->nr_allocs++;
33079b21
MM		 773
774 c->cmdindex = i;
7c832835 775 }
1da177e4 776
8a3173de 777 INIT_HLIST_NODE(&c->list);
1da177e4 778 c->busaddr = (__u32) cmd_dma_handle;
7c832835 779 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 780 c->ErrDesc.Addr.lower = temp64.val32.lower;
781 c->ErrDesc.Addr.upper = temp64.val32.upper;
782 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 783
7c832835
BH		 784 c->ctlr = h->ctlr;
785 return c;
1da177e4
LT		 786}
787
7c832835
BH		 788/*
789 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 790 */
791static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
792{
793 int i;
794 u64bit temp64;
795
7c832835 796 if (!got_from_pool) {
1da177e4
LT		 797 temp64.val32.lower = c->ErrDesc.Addr.lower;
798 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 799 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
800 c->err_info, (dma_addr_t) temp64.val);
801 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
802 c, (dma_addr_t) c->busaddr);
803 } else {
1da177e4 804 i = c - h->cmd_pool;
7c832835
BH		 805 clear_bit(i & (BITS_PER_LONG - 1),
806 h->cmd_pool_bits + (i / BITS_PER_LONG));
807 h->nr_frees++;
808 }
1da177e4
LT		 809}
810
811static inline ctlr_info_t *get_host(struct gendisk *disk)
812{
7c832835 813 return disk->queue->queuedata;
1da177e4
LT		 814}
815
816static inline drive_info_struct *get_drv(struct gendisk *disk)
817{
818 return disk->private_data;
819}
820
821/*
822 * Open. Make sure the device is really there.
823 */
ef7822c2 824static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 825{
ef7822c2
AV		 826 ctlr_info_t *host = get_host(bdev->bd_disk);
827 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 828
829#ifdef CCISS_DEBUG
ef7822c2 830 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 831#endif /* CCISS_DEBUG */
1da177e4 832
2e043986 833 if (drv->busy_configuring)
ddd47442 834 return -EBUSY;
1da177e4
LT		 835 /*
836 * Root is allowed to open raw volume zero even if it's not configured
837 * so array config can still work. Root is also allowed to open any
838 * volume that has a LUN ID, so it can issue IOCTL to reread the
839 * disk information. I don't think I really like this
840 * but I'm already using way to many device nodes to claim another one
841 * for "raw controller".
842 */
7a06f789 843 if (drv->heads == 0) {
ef7822c2 844 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 845 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 846 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 847 return -ENXIO;
1da177e4 848 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 849 } else if (memcmp(drv->LunID, CTLR_LUNID,
850 sizeof(drv->LunID))) {
1da177e4
LT		 851 return -ENXIO;
852 }
853 }
854 if (!capable(CAP_SYS_ADMIN))
855 return -EPERM;
856 }
857 drv->usage_count++;
858 host->usage_count++;
859 return 0;
860}
7c832835 861
1da177e4
LT		 862/*
863 * Close. Sync first.
864 */
ef7822c2 865static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 866{
ef7822c2
AV		 867 ctlr_info_t *host = get_host(disk);
868 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 869
870#ifdef CCISS_DEBUG
ef7822c2 871 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 872#endif /* CCISS_DEBUG */
1da177e4
LT		 873
874 drv->usage_count--;
875 host->usage_count--;
876 return 0;
877}
878
879#ifdef CONFIG_COMPAT
880
ef7822c2
AV		 881static int do_ioctl(struct block_device *bdev, fmode_t mode,
882 unsigned cmd, unsigned long arg)
1da177e4
LT		 883{
884 int ret;
885 lock_kernel();
ef7822c2 886 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 887 unlock_kernel();
888 return ret;
889}
890
ef7822c2
AV		 891static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
892 unsigned cmd, unsigned long arg);
893static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
894 unsigned cmd, unsigned long arg);
1da177e4 895
ef7822c2
AV		 896static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
897 unsigned cmd, unsigned long arg)
1da177e4
LT		 898{
899 switch (cmd) {
900 case CCISS_GETPCIINFO:
901 case CCISS_GETINTINFO:
902 case CCISS_SETINTINFO:
903 case CCISS_GETNODENAME:
904 case CCISS_SETNODENAME:
905 case CCISS_GETHEARTBEAT:
906 case CCISS_GETBUSTYPES:
907 case CCISS_GETFIRMVER:
908 case CCISS_GETDRIVVER:
909 case CCISS_REVALIDVOLS:
910 case CCISS_DEREGDISK:
911 case CCISS_REGNEWDISK:
912 case CCISS_REGNEWD:
913 case CCISS_RESCANDISK:
914 case CCISS_GETLUNINFO:
ef7822c2 915 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 916
917 case CCISS_PASSTHRU32:
ef7822c2 918 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 919 case CCISS_BIG_PASSTHRU32:
ef7822c2 920 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 921
922 default:
923 return -ENOIOCTLCMD;
924 }
925}
926
ef7822c2
AV		 927static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
928 unsigned cmd, unsigned long arg)
1da177e4
LT		 929{
930 IOCTL32_Command_struct __user *arg32 =
7c832835 931 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 932 IOCTL_Command_struct arg64;
933 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
934 int err;
935 u32 cp;
936
937 err = 0;
7c832835
BH		 938 err |=
939 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
940 sizeof(arg64.LUN_info));
941 err |=
942 copy_from_user(&arg64.Request, &arg32->Request,
943 sizeof(arg64.Request));
944 err |=
945 copy_from_user(&arg64.error_info, &arg32->error_info,
946 sizeof(arg64.error_info));
1da177e4
LT		 947 err |= get_user(arg64.buf_size, &arg32->buf_size);
948 err |= get_user(cp, &arg32->buf);
949 arg64.buf = compat_ptr(cp);
950 err |= copy_to_user(p, &arg64, sizeof(arg64));
951
952 if (err)
953 return -EFAULT;
954
ef7822c2 955 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 956 if (err)
957 return err;
7c832835
BH		 958 err |=
959 copy_in_user(&arg32->error_info, &p->error_info,
960 sizeof(arg32->error_info));
1da177e4
LT		 961 if (err)
962 return -EFAULT;
963 return err;
964}
965
ef7822c2
AV		 966static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
967 unsigned cmd, unsigned long arg)
1da177e4
LT		 968{
969 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 970 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 971 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 972 BIG_IOCTL_Command_struct __user *p =
973 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 974 int err;
975 u32 cp;
976
977 err = 0;
7c832835
BH		 978 err |=
979 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
980 sizeof(arg64.LUN_info));
981 err |=
982 copy_from_user(&arg64.Request, &arg32->Request,
983 sizeof(arg64.Request));
984 err |=
985 copy_from_user(&arg64.error_info, &arg32->error_info,
986 sizeof(arg64.error_info));
1da177e4
LT		 987 err |= get_user(arg64.buf_size, &arg32->buf_size);
988 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
989 err |= get_user(cp, &arg32->buf);
990 arg64.buf = compat_ptr(cp);
991 err |= copy_to_user(p, &arg64, sizeof(arg64));
992
993 if (err)
7c832835 994 return -EFAULT;
1da177e4 995
ef7822c2 996 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 997 if (err)
998 return err;
7c832835
BH		 999 err |=
1000 copy_in_user(&arg32->error_info, &p->error_info,
1001 sizeof(arg32->error_info));
1da177e4
LT		 1002 if (err)
1003 return -EFAULT;
1004 return err;
1005}
1006#endif
a885c8c4
CH		 1007
1008static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1009{
1010 drive_info_struct *drv = get_drv(bdev->bd_disk);
1011
1012 if (!drv->cylinders)
1013 return -ENXIO;
1014
1015 geo->heads = drv->heads;
1016 geo->sectors = drv->sectors;
1017 geo->cylinders = drv->cylinders;
1018 return 0;
1019}
1020
0a9279cc
MM		 1021static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1022{
1023 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1024 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1025 (void)check_for_unit_attention(host, c);
1026}
1da177e4 1027/*
7c832835 1028 * ioctl
1da177e4 1029 */
ef7822c2 1030static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1031 unsigned int cmd, unsigned long arg)
1da177e4 1032{
1da177e4
LT		 1033 struct gendisk *disk = bdev->bd_disk;
1034 ctlr_info_t *host = get_host(disk);
1035 drive_info_struct *drv = get_drv(disk);
1036 int ctlr = host->ctlr;
1037 void __user *argp = (void __user *)arg;
1038
1039#ifdef CCISS_DEBUG
1040 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1041#endif /* CCISS_DEBUG */
1042
1043 switch (cmd) {
1da177e4 1044 case CCISS_GETPCIINFO:
7c832835
BH		 1045 {
1046 cciss_pci_info_struct pciinfo;
1047
1048 if (!arg)
1049 return -EINVAL;
1050 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1051 pciinfo.bus = host->pdev->bus->number;
1052 pciinfo.dev_fn = host->pdev->devfn;
1053 pciinfo.board_id = host->board_id;
1054 if (copy_to_user
1055 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1056 return -EFAULT;
1057 return 0;
1058 }
1da177e4 1059 case CCISS_GETINTINFO:
7c832835
BH		 1060 {
1061 cciss_coalint_struct intinfo;
1062 if (!arg)
1063 return -EINVAL;
1064 intinfo.delay =
1065 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1066 intinfo.count =
1067 readl(&host->cfgtable->HostWrite.CoalIntCount);
1068 if (copy_to_user
1069 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1070 return -EFAULT;
1071 return 0;
1072 }
1da177e4 1073 case CCISS_SETINTINFO:
1da177e4 1074 {
7c832835
BH		 1075 cciss_coalint_struct intinfo;
1076 unsigned long flags;
1077 int i;
1078
1079 if (!arg)
1080 return -EINVAL;
1081 if (!capable(CAP_SYS_ADMIN))
1082 return -EPERM;
1083 if (copy_from_user
1084 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1085 return -EFAULT;
1086 if ((intinfo.delay == 0) && (intinfo.count == 0))
1087 {
1088// printk("cciss_ioctl: delay and count cannot be 0\n");
1089 return -EINVAL;
1090 }
1091 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1092 /* Update the field, and then ring the doorbell */
1093 writel(intinfo.delay,
1094 &(host->cfgtable->HostWrite.CoalIntDelay));
1095 writel(intinfo.count,
1096 &(host->cfgtable->HostWrite.CoalIntCount));
1097 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1098
1099 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1100 if (!(readl(host->vaddr + SA5_DOORBELL)
1101 & CFGTBL_ChangeReq))
1102 break;
1103 /* delay and try again */
1104 udelay(1000);
1105 }
1106 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1107 if (i >= MAX_IOCTL_CONFIG_WAIT)
1108 return -EAGAIN;
1109 return 0;
1da177e4 1110 }
1da177e4 1111 case CCISS_GETNODENAME:
7c832835
BH		 1112 {
1113 NodeName_type NodeName;
1114 int i;
1115
1116 if (!arg)
1117 return -EINVAL;
1118 for (i = 0; i < 16; i++)
1119 NodeName[i] =
1120 readb(&host->cfgtable->ServerName[i]);
1121 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1122 return -EFAULT;
1123 return 0;
1124 }
1da177e4 1125 case CCISS_SETNODENAME:
7c832835
BH		 1126 {
1127 NodeName_type NodeName;
1128 unsigned long flags;
1129 int i;
1130
1131 if (!arg)
1132 return -EINVAL;
1133 if (!capable(CAP_SYS_ADMIN))
1134 return -EPERM;
1135
1136 if (copy_from_user
1137 (NodeName, argp, sizeof(NodeName_type)))
1138 return -EFAULT;
1139
1140 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1141
1142 /* Update the field, and then ring the doorbell */
1143 for (i = 0; i < 16; i++)
1144 writeb(NodeName[i],
1145 &host->cfgtable->ServerName[i]);
1146
1147 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1148
1149 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1150 if (!(readl(host->vaddr + SA5_DOORBELL)
1151 & CFGTBL_ChangeReq))
1152 break;
1153 /* delay and try again */
1154 udelay(1000);
1155 }
1156 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1157 if (i >= MAX_IOCTL_CONFIG_WAIT)
1158 return -EAGAIN;
1159 return 0;
1160 }
1da177e4
LT		 1161
1162 case CCISS_GETHEARTBEAT:
7c832835
BH		 1163 {
1164 Heartbeat_type heartbeat;
1165
1166 if (!arg)
1167 return -EINVAL;
1168 heartbeat = readl(&host->cfgtable->HeartBeat);
1169 if (copy_to_user
1170 (argp, &heartbeat, sizeof(Heartbeat_type)))
1171 return -EFAULT;
1172 return 0;
1173 }
1da177e4 1174 case CCISS_GETBUSTYPES:
7c832835
BH		 1175 {
1176 BusTypes_type BusTypes;
1177
1178 if (!arg)
1179 return -EINVAL;
1180 BusTypes = readl(&host->cfgtable->BusTypes);
1181 if (copy_to_user
1182 (argp, &BusTypes, sizeof(BusTypes_type)))
1183 return -EFAULT;
1184 return 0;
1185 }
1da177e4 1186 case CCISS_GETFIRMVER:
7c832835
BH		 1187 {
1188 FirmwareVer_type firmware;
1da177e4 1189
7c832835
BH		 1190 if (!arg)
1191 return -EINVAL;
1192 memcpy(firmware, host->firm_ver, 4);
1da177e4 1193
7c832835
BH		 1194 if (copy_to_user
1195 (argp, firmware, sizeof(FirmwareVer_type)))
1196 return -EFAULT;
1197 return 0;
1198 }
1199 case CCISS_GETDRIVVER:
1200 {
1201 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1202
7c832835
BH		 1203 if (!arg)
1204 return -EINVAL;
1da177e4 1205
7c832835
BH		 1206 if (copy_to_user
1207 (argp, &DriverVer, sizeof(DriverVer_type)))
1208 return -EFAULT;
1209 return 0;
1210 }
1da177e4 1211
6ae5ce8e
MM		 1212 case CCISS_DEREGDISK:
1213 case CCISS_REGNEWD:
1da177e4 1214 case CCISS_REVALIDVOLS:
2d11d993 1215 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1216
1217 case CCISS_GETLUNINFO:{
1218 LogvolInfo_struct luninfo;
1219
39ccf9a6
SC		 1220 memcpy(&luninfo.LunID, drv->LunID,
1221 sizeof(luninfo.LunID));
7c832835
BH		 1222 luninfo.num_opens = drv->usage_count;
1223 luninfo.num_parts = 0;
1224 if (copy_to_user(argp, &luninfo,
1225 sizeof(LogvolInfo_struct)))
1226 return -EFAULT;
1227 return 0;
1228 }
1da177e4 1229 case CCISS_PASSTHRU:
1da177e4 1230 {
7c832835
BH		 1231 IOCTL_Command_struct iocommand;
1232 CommandList_struct *c;
1233 char *buff = NULL;
1234 u64bit temp64;
1235 unsigned long flags;
6e9a4738 1236 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1237
7c832835
BH		 1238 if (!arg)
1239 return -EINVAL;
1da177e4 1240
7c832835
BH		 1241 if (!capable(CAP_SYS_RAWIO))
1242 return -EPERM;
1da177e4 1243
7c832835
BH		 1244 if (copy_from_user
1245 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1246 return -EFAULT;
1247 if ((iocommand.buf_size < 1) &&
1248 (iocommand.Request.Type.Direction != XFER_NONE)) {
1249 return -EINVAL;
1250 }
1251#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1252 /* Check kmalloc limits */
1253 if (iocommand.buf_size > 128000)
1254 return -EINVAL;
1255#endif
1256 if (iocommand.buf_size > 0) {
1257 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1258 if (buff == NULL)
1259 return -EFAULT;
1260 }
1261 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1262 /* Copy the data into the buffer we created */
1263 if (copy_from_user
1264 (buff, iocommand.buf, iocommand.buf_size)) {
1265 kfree(buff);
1266 return -EFAULT;
1267 }
1268 } else {
1269 memset(buff, 0, iocommand.buf_size);
1270 }
1271 if ((c = cmd_alloc(host, 0)) == NULL) {
1272 kfree(buff);
1273 return -ENOMEM;
1274 }
1275 // Fill in the command type
1276 c->cmd_type = CMD_IOCTL_PEND;
1277 // Fill in Command Header
1278 c->Header.ReplyQueue = 0; // unused in simple mode
1279 if (iocommand.buf_size > 0) // buffer to fill
1280 {
1281 c->Header.SGList = 1;
1282 c->Header.SGTotal = 1;
1283 } else // no buffers to fill
1284 {
1285 c->Header.SGList = 0;
1286 c->Header.SGTotal = 0;
1287 }
1288 c->Header.LUN = iocommand.LUN_info;
1289 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1290
7c832835
BH		 1291 // Fill in Request block
1292 c->Request = iocommand.Request;
1da177e4 1293
7c832835
BH		 1294 // Fill in the scatter gather information
1295 if (iocommand.buf_size > 0) {
1296 temp64.val = pci_map_single(host->pdev, buff,
1297 iocommand.buf_size,
1298 PCI_DMA_BIDIRECTIONAL);
1299 c->SG[0].Addr.lower = temp64.val32.lower;
1300 c->SG[0].Addr.upper = temp64.val32.upper;
1301 c->SG[0].Len = iocommand.buf_size;
1302 c->SG[0].Ext = 0; // we are not chaining
1303 }
1304 c->waiting = &wait;
1305
1306 /* Put the request on the tail of the request queue */
1307 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1308 addQ(&host->reqQ, c);
1309 host->Qdepth++;
1310 start_io(host);
1311 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1312
1313 wait_for_completion(&wait);
1314
1315 /* unlock the buffers from DMA */
1316 temp64.val32.lower = c->SG[0].Addr.lower;
1317 temp64.val32.upper = c->SG[0].Addr.upper;
1318 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1319 iocommand.buf_size,
1320 PCI_DMA_BIDIRECTIONAL);
1321
0a9279cc
MM		 1322 check_ioctl_unit_attention(host, c);
1323
7c832835
BH		 1324 /* Copy the error information out */
1325 iocommand.error_info = *(c->err_info);
1326 if (copy_to_user
1327 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1328 kfree(buff);
1da177e4
LT		 1329 cmd_free(host, c, 0);
1330 return -EFAULT;
1331 }
7c832835
BH		 1332
1333 if (iocommand.Request.Type.Direction == XFER_READ) {
1334 /* Copy the data out of the buffer we created */
1335 if (copy_to_user
1336 (iocommand.buf, buff, iocommand.buf_size)) {
1337 kfree(buff);
1338 cmd_free(host, c, 0);
1339 return -EFAULT;
1340 }
1341 }
1342 kfree(buff);
1343 cmd_free(host, c, 0);
1344 return 0;
1da177e4 1345 }
7c832835
BH		 1346 case CCISS_BIG_PASSTHRU:{
1347 BIG_IOCTL_Command_struct *ioc;
1348 CommandList_struct *c;
1349 unsigned char **buff = NULL;
1350 int *buff_size = NULL;
1351 u64bit temp64;
1352 unsigned long flags;
1353 BYTE sg_used = 0;
1354 int status = 0;
1355 int i;
6e9a4738 1356 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1357 __u32 left;
1358 __u32 sz;
1359 BYTE __user *data_ptr;
1360
1361 if (!arg)
1362 return -EINVAL;
1363 if (!capable(CAP_SYS_RAWIO))
1364 return -EPERM;
1365 ioc = (BIG_IOCTL_Command_struct *)
1366 kmalloc(sizeof(*ioc), GFP_KERNEL);
1367 if (!ioc) {
1368 status = -ENOMEM;
1369 goto cleanup1;
1370 }
1371 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1372 status = -EFAULT;
1373 goto cleanup1;
1374 }
1375 if ((ioc->buf_size < 1) &&
1376 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1377 status = -EINVAL;
1378 goto cleanup1;
7c832835
BH		 1379 }
1380 /* Check kmalloc limits using all SGs */
1381 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1382 status = -EINVAL;
1383 goto cleanup1;
1384 }
1385 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1386 status = -EINVAL;
1387 goto cleanup1;
1388 }
1389 buff =
1390 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1391 if (!buff) {
1da177e4
LT		 1392 status = -ENOMEM;
1393 goto cleanup1;
1394 }
5cbded58 1395 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1396 GFP_KERNEL);
1397 if (!buff_size) {
1398 status = -ENOMEM;
1399 goto cleanup1;
1400 }
1401 left = ioc->buf_size;
1402 data_ptr = ioc->buf;
1403 while (left) {
1404 sz = (left >
1405 ioc->malloc_size) ? ioc->
1406 malloc_size : left;
1407 buff_size[sg_used] = sz;
1408 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1409 if (buff[sg_used] == NULL) {
1da177e4 1410 status = -ENOMEM;
15534d38
JA		 1411 goto cleanup1;
1412 }
7c832835
BH		 1413 if (ioc->Request.Type.Direction == XFER_WRITE) {
1414 if (copy_from_user
1415 (buff[sg_used], data_ptr, sz)) {
f7108f91 1416 status = -EFAULT;
7c832835
BH		 1417 goto cleanup1;
1418 }
1419 } else {
1420 memset(buff[sg_used], 0, sz);
1421 }
1422 left -= sz;
1423 data_ptr += sz;
1424 sg_used++;
1425 }
1426 if ((c = cmd_alloc(host, 0)) == NULL) {
1427 status = -ENOMEM;
1428 goto cleanup1;
1429 }
1430 c->cmd_type = CMD_IOCTL_PEND;
1431 c->Header.ReplyQueue = 0;
1432
1433 if (ioc->buf_size > 0) {
1434 c->Header.SGList = sg_used;
1435 c->Header.SGTotal = sg_used;
1da177e4 1436 } else {
7c832835
BH		 1437 c->Header.SGList = 0;
1438 c->Header.SGTotal = 0;
1da177e4 1439 }
7c832835
BH		 1440 c->Header.LUN = ioc->LUN_info;
1441 c->Header.Tag.lower = c->busaddr;
1442
1443 c->Request = ioc->Request;
1444 if (ioc->buf_size > 0) {
1445 int i;
1446 for (i = 0; i < sg_used; i++) {
1447 temp64.val =
1448 pci_map_single(host->pdev, buff[i],
1449 buff_size[i],
1450 PCI_DMA_BIDIRECTIONAL);
1451 c->SG[i].Addr.lower =
1452 temp64.val32.lower;
1453 c->SG[i].Addr.upper =
1454 temp64.val32.upper;
1455 c->SG[i].Len = buff_size[i];
1456 c->SG[i].Ext = 0; /* we are not chaining */
1457 }
1458 }
1459 c->waiting = &wait;
1460 /* Put the request on the tail of the request queue */
1461 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1462 addQ(&host->reqQ, c);
1463 host->Qdepth++;
1464 start_io(host);
1465 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1466 wait_for_completion(&wait);
1467 /* unlock the buffers from DMA */
1468 for (i = 0; i < sg_used; i++) {
1469 temp64.val32.lower = c->SG[i].Addr.lower;
1470 temp64.val32.upper = c->SG[i].Addr.upper;
1471 pci_unmap_single(host->pdev,
1472 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1473 PCI_DMA_BIDIRECTIONAL);
1da177e4 1474 }
0a9279cc 1475 check_ioctl_unit_attention(host, c);
7c832835
BH		 1476 /* Copy the error information out */
1477 ioc->error_info = *(c->err_info);
1478 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1479 cmd_free(host, c, 0);
1480 status = -EFAULT;
1481 goto cleanup1;
1482 }
1483 if (ioc->Request.Type.Direction == XFER_READ) {
1484 /* Copy the data out of the buffer we created */
1485 BYTE __user *ptr = ioc->buf;
1486 for (i = 0; i < sg_used; i++) {
1487 if (copy_to_user
1488 (ptr, buff[i], buff_size[i])) {
1489 cmd_free(host, c, 0);
1490 status = -EFAULT;
1491 goto cleanup1;
1492 }
1493 ptr += buff_size[i];
1da177e4 1494 }
1da177e4 1495 }
7c832835
BH		 1496 cmd_free(host, c, 0);
1497 status = 0;
1498 cleanup1:
1499 if (buff) {
1500 for (i = 0; i < sg_used; i++)
1501 kfree(buff[i]);
1502 kfree(buff);
1503 }
1504 kfree(buff_size);
1505 kfree(ioc);
1506 return status;
1da177e4 1507 }
03bbfee5
MMOD		 1508
1509 /* scsi_cmd_ioctl handles these, below, though some are not */
1510 /* very meaningful for cciss. SG_IO is the main one people want. */
1511
1512 case SG_GET_VERSION_NUM:
1513 case SG_SET_TIMEOUT:
1514 case SG_GET_TIMEOUT:
1515 case SG_GET_RESERVED_SIZE:
1516 case SG_SET_RESERVED_SIZE:
1517 case SG_EMULATED_HOST:
1518 case SG_IO:
1519 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1520 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1521
1522 /* scsi_cmd_ioctl would normally handle these, below, but */
1523 /* they aren't a good fit for cciss, as CD-ROMs are */
1524 /* not supported, and we don't have any bus/target/lun */
1525 /* which we present to the kernel. */
1526
1527 case CDROM_SEND_PACKET:
1528 case CDROMCLOSETRAY:
1529 case CDROMEJECT:
1530 case SCSI_IOCTL_GET_IDLUN:
1531 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1532 default:
1533 return -ENOTTY;
1534 }
1da177e4
LT		 1535}
1536
7b30f092
JA		 1537static void cciss_check_queues(ctlr_info_t *h)
1538{
1539 int start_queue = h->next_to_run;
1540 int i;
1541
1542 /* check to see if we have maxed out the number of commands that can
1543 * be placed on the queue. If so then exit. We do this check here
1544 * in case the interrupt we serviced was from an ioctl and did not
1545 * free any new commands.
1546 */
f880632f 1547 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1548 return;
1549
1550 /* We have room on the queue for more commands. Now we need to queue
1551 * them up. We will also keep track of the next queue to run so
1552 * that every queue gets a chance to be started first.
1553 */
1554 for (i = 0; i < h->highest_lun + 1; i++) {
1555 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1556 /* make sure the disk has been added and the drive is real
1557 * because this can be called from the middle of init_one.
1558 */
1559 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1560 continue;
1561 blk_start_queue(h->gendisk[curr_queue]->queue);
1562
1563 /* check to see if we have maxed out the number of commands
1564 * that can be placed on the queue.
1565 */
f880632f 1566 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1567 if (curr_queue == start_queue) {
1568 h->next_to_run =
1569 (start_queue + 1) % (h->highest_lun + 1);
1570 break;
1571 } else {
1572 h->next_to_run = curr_queue;
1573 break;
1574 }
7b30f092
JA		 1575 }
1576 }
1577}
1578
ca1e0484
MM		 1579static void cciss_softirq_done(struct request *rq)
1580{
1581 CommandList_struct *cmd = rq->completion_data;
1582 ctlr_info_t *h = hba[cmd->ctlr];
1583 unsigned long flags;
1584 u64bit temp64;
1585 int i, ddir;
1586
1587 if (cmd->Request.Type.Direction == XFER_READ)
1588 ddir = PCI_DMA_FROMDEVICE;
1589 else
1590 ddir = PCI_DMA_TODEVICE;
1591
1592 /* command did not need to be retried */
1593 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1594 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1595 temp64.val32.lower = cmd->SG[i].Addr.lower;
1596 temp64.val32.upper = cmd->SG[i].Addr.upper;
1597 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1598 }
1599
ca1e0484
MM		 1600#ifdef CCISS_DEBUG
1601 printk("Done with %p\n", rq);
7c832835 1602#endif /* CCISS_DEBUG */
ca1e0484 1603
c3a4d78c 1604 /* set the residual count for pc requests */
ac44e5b2 1605 if (blk_pc_request(rq))
c3a4d78c 1606 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1607
c3a4d78c 1608 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1609
ca1e0484 1610 spin_lock_irqsave(&h->lock, flags);
7c832835 1611 cmd_free(h, cmd, 1);
7b30f092 1612 cciss_check_queues(h);
ca1e0484
MM		 1613 spin_unlock_irqrestore(&h->lock, flags);
1614}
1615
39ccf9a6
SC		 1616static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1617 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1618{
39ccf9a6
SC		 1619 memcpy(scsi3addr, h->drv[log_unit].LunID,
1620 sizeof(h->drv[log_unit].LunID));
b57695fe 1621}
1622
7fe06326
AP		 1623/* This function gets the SCSI vendor, model, and revision of a logical drive
1624 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1625 * they cannot be read.
1626 */
1627static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1628 char *vendor, char *model, char *rev)
1629{
1630 int rc;
1631 InquiryData_struct *inq_buf;
b57695fe 1632 unsigned char scsi3addr[8];
7fe06326
AP		 1633
1634 *vendor = '\0';
1635 *model = '\0';
1636 *rev = '\0';
1637
1638 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1639 if (!inq_buf)
1640 return;
1641
b57695fe 1642 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1643 if (withirq)
1644 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1645 sizeof(InquiryData_struct), 0,
1646 scsi3addr, TYPE_CMD);
7fe06326
AP		 1647 else
1648 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1649 sizeof(InquiryData_struct), 0,
1650 scsi3addr, TYPE_CMD);
7fe06326
AP		 1651 if (rc == IO_OK) {
1652 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1653 vendor[VENDOR_LEN] = '\0';
1654 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1655 model[MODEL_LEN] = '\0';
1656 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1657 rev[REV_LEN] = '\0';
1658 }
1659
1660 kfree(inq_buf);
1661 return;
1662}
1663
a72da29b
MM		 1664/* This function gets the serial number of a logical drive via
1665 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1666 * number cannot be had, for whatever reason, 16 bytes of 0xff
1667 * are returned instead.
1668 */
1669static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1670 unsigned char *serial_no, int buflen)
1671{
1672#define PAGE_83_INQ_BYTES 64
1673 int rc;
1674 unsigned char *buf;
b57695fe 1675 unsigned char scsi3addr[8];
a72da29b
MM		 1676
1677 if (buflen > 16)
1678 buflen = 16;
1679 memset(serial_no, 0xff, buflen);
1680 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1681 if (!buf)
1682 return;
1683 memset(serial_no, 0, buflen);
b57695fe 1684 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1685 if (withirq)
1686 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1687 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1688 else
1689 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1690 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1691 if (rc == IO_OK)
1692 memcpy(serial_no, &buf[8], buflen);
1693 kfree(buf);
1694 return;
1695}
1696
617e1344
SC		 1697/*
1698 * cciss_add_disk sets up the block device queue for a logical drive
1699 */
1700static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1701 int drv_index)
1702{
1703 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1704 if (!disk->queue)
1705 goto init_queue_failure;
6ae5ce8e
MM		 1706 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1707 disk->major = h->major;
1708 disk->first_minor = drv_index << NWD_SHIFT;
1709 disk->fops = &cciss_fops;
617e1344
SC		 1710 if (h->drv[drv_index].dev == NULL) {
1711 if (cciss_create_ld_sysfs_entry(h, drv_index))
1712 goto cleanup_queue;
1713 }
6ae5ce8e 1714 disk->private_data = &h->drv[drv_index];
617e1344 1715 disk->driverfs_dev = h->drv[drv_index].dev;
6ae5ce8e
MM		 1716
1717 /* Set up queue information */
1718 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1719
1720 /* This is a hardware imposed limit. */
1721 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1722
1723 /* This is a limit in the driver and could be eliminated. */
1724 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1725
1726 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1727
1728 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1729
1730 disk->queue->queuedata = h;
1731
e1defc4f
MP		 1732 blk_queue_logical_block_size(disk->queue,
1733 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1734
1735 /* Make sure all queue data is written out before */
1736 /* setting h->drv[drv_index].queue, as setting this */
1737 /* allows the interrupt handler to start the queue */
1738 wmb();
1739 h->drv[drv_index].queue = disk->queue;
1740 add_disk(disk);
617e1344
SC		 1741 return 0;
1742
1743cleanup_queue:
1744 blk_cleanup_queue(disk->queue);
1745 disk->queue = NULL;
e8074f79 1746init_queue_failure:
617e1344 1747 return -1;
6ae5ce8e
MM		 1748}
1749
ddd47442 1750/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1751 * If the usage_count is zero and it is a heretofore unknown drive, or,
1752 * the drive's capacity, geometry, or serial number has changed,
1753 * then the drive information will be updated and the disk will be
1754 * re-registered with the kernel. If these conditions don't hold,
1755 * then it will be left alone for the next reboot. The exception to this
1756 * is disk 0 which will always be left registered with the kernel since it
1757 * is also the controller node. Any changes to disk 0 will show up on
1758 * the next reboot.
7c832835 1759 */
2d11d993
SC		 1760static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1761 int via_ioctl)
7c832835 1762{
ddd47442
MM		 1763 ctlr_info_t *h = hba[ctlr];
1764 struct gendisk *disk;
ddd47442
MM		 1765 InquiryData_struct *inq_buff = NULL;
1766 unsigned int block_size;
00988a35 1767 sector_t total_size;
ddd47442
MM		 1768 unsigned long flags = 0;
1769 int ret = 0;
a72da29b
MM		 1770 drive_info_struct *drvinfo;
1771
1772 /* Get information about the disk and modify the driver structure */
1773 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1774 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1775 if (inq_buff == NULL || drvinfo == NULL)
1776 goto mem_msg;
1777
1778 /* testing to see if 16-byte CDBs are already being used */
1779 if (h->cciss_read == CCISS_READ_16) {
1780 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1781 &total_size, &block_size);
1782
1783 } else {
1784 cciss_read_capacity(ctlr, drv_index, 1,
1785 &total_size, &block_size);
1786
1787 /* if read_capacity returns all F's this volume is >2TB */
1788 /* in size so we switch to 16-byte CDB's for all */
1789 /* read/write ops */
1790 if (total_size == 0xFFFFFFFFULL) {
1791 cciss_read_capacity_16(ctlr, drv_index, 1,
1792 &total_size, &block_size);
1793 h->cciss_read = CCISS_READ_16;
1794 h->cciss_write = CCISS_WRITE_16;
1795 } else {
1796 h->cciss_read = CCISS_READ_10;
1797 h->cciss_write = CCISS_WRITE_10;
1798 }
1799 }
1800
1801 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1802 inq_buff, drvinfo);
1803 drvinfo->block_size = block_size;
1804 drvinfo->nr_blocks = total_size + 1;
1805
7fe06326
AP		 1806 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1807 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1808 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1809 sizeof(drvinfo->serial_no));
1810
1811 /* Is it the same disk we already know, and nothing's changed? */
1812 if (h->drv[drv_index].raid_level != -1 &&
1813 ((memcmp(drvinfo->serial_no,
1814 h->drv[drv_index].serial_no, 16) == 0) &&
1815 drvinfo->block_size == h->drv[drv_index].block_size &&
1816 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1817 drvinfo->heads == h->drv[drv_index].heads &&
1818 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1819 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1820 /* The disk is unchanged, nothing to update */
1821 goto freeret;
a72da29b 1822
6ae5ce8e
MM		 1823 /* If we get here it's not the same disk, or something's changed,
1824 * so we need to * deregister it, and re-register it, if it's not
1825 * in use.
1826 * If the disk already exists then deregister it before proceeding
1827 * (unless it's the first disk (for the controller node).
1828 */
a72da29b
MM		 1829 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1830 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1831 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1832 h->drv[drv_index].busy_configuring = 1;
1833 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1834
6ae5ce8e
MM		 1835 /* deregister_disk sets h->drv[drv_index].queue = NULL
1836 * which keeps the interrupt handler from starting
1837 * the queue.
1838 */
2d11d993 1839 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1840 h->drv[drv_index].busy_configuring = 0;
1841 }
1842
1843 /* If the disk is in use return */
1844 if (ret)
a72da29b
MM		 1845 goto freeret;
1846
6ae5ce8e
MM		 1847 /* Save the new information from cciss_geometry_inquiry
1848 * and serial number inquiry.
1849 */
a72da29b
MM		 1850 h->drv[drv_index].block_size = drvinfo->block_size;
1851 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1852 h->drv[drv_index].heads = drvinfo->heads;
1853 h->drv[drv_index].sectors = drvinfo->sectors;
1854 h->drv[drv_index].cylinders = drvinfo->cylinders;
1855 h->drv[drv_index].raid_level = drvinfo->raid_level;
1856 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1857 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1858 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1859 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1860
1861 ++h->num_luns;
1862 disk = h->gendisk[drv_index];
1863 set_capacity(disk, h->drv[drv_index].nr_blocks);
1864
6ae5ce8e
MM		 1865 /* If it's not disk 0 (drv_index != 0)
1866 * or if it was disk 0, but there was previously
1867 * no actual corresponding configured logical drive
1868 * (raid_leve == -1) then we want to update the
1869 * logical drive's information.
1870 */
361e9b07
SC		 1871 if (drv_index || first_time) {
1872 if (cciss_add_disk(h, disk, drv_index) != 0) {
1873 cciss_free_gendisk(h, drv_index);
1874 printk(KERN_WARNING "cciss:%d could not update "
1875 "disk %d\n", h->ctlr, drv_index);
1876 --h->num_luns;
1877 }
1878 }
ddd47442 1879
6ae5ce8e 1880freeret:
ddd47442 1881 kfree(inq_buff);
a72da29b 1882 kfree(drvinfo);
ddd47442 1883 return;
6ae5ce8e 1884mem_msg:
ddd47442
MM		 1885 printk(KERN_ERR "cciss: out of memory\n");
1886 goto freeret;
1887}
1888
1889/* This function will find the first index of the controllers drive array
1890 * that has a -1 for the raid_level and will return that index. This is
1891 * where new drives will be added. If the index to be returned is greater
1892 * than the highest_lun index for the controller then highest_lun is set
1893 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1894 * "controller_node" is used to know if this is a real logical drive, or just
1895 * the controller node, which determines if this counts towards highest_lun.
7c832835 1896 */
eece695f 1897static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1898{
1899 int i;
1900
7c832835
BH		 1901 for (i = 0; i < CISS_MAX_LUN; i++) {
1902 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1903 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1904 if (!controller_node)
1905 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1906 return i;
1907 }
1908 }
1909 return -1;
1910}
1911
361e9b07
SC		 1912static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
1913{
1914 put_disk(h->gendisk[drv_index]);
1915 h->gendisk[drv_index] = NULL;
1916}
1917
6ae5ce8e
MM		 1918/* cciss_add_gendisk finds a free hba[]->drv structure
1919 * and allocates a gendisk if needed, and sets the lunid
1920 * in the drvinfo structure. It returns the index into
1921 * the ->drv[] array, or -1 if none are free.
1922 * is_controller_node indicates whether highest_lun should
1923 * count this disk, or if it's only being added to provide
1924 * a means to talk to the controller in case no logical
1925 * drives have yet been configured.
1926 */
39ccf9a6
SC		 1927static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
1928 int controller_node)
6ae5ce8e
MM		 1929{
1930 int drv_index;
1931
eece695f 1932 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1933 if (drv_index == -1)
1934 return -1;
8ce51966 1935
6ae5ce8e
MM		 1936 /*Check if the gendisk needs to be allocated */
1937 if (!h->gendisk[drv_index]) {
1938 h->gendisk[drv_index] =
1939 alloc_disk(1 << NWD_SHIFT);
1940 if (!h->gendisk[drv_index]) {
1941 printk(KERN_ERR "cciss%d: could not "
1942 "allocate a new disk %d\n",
1943 h->ctlr, drv_index);
1944 return -1;
1945 }
1946 }
39ccf9a6
SC		 1947 memcpy(h->drv[drv_index].LunID, lunid,
1948 sizeof(h->drv[drv_index].LunID));
097d0264
SC		 1949 if (h->drv[drv_index].dev == NULL) {
1950 if (cciss_create_ld_sysfs_entry(h, drv_index))
1951 goto err_free_disk;
1952 }
6ae5ce8e
MM		 1953 /* Don't need to mark this busy because nobody */
1954 /* else knows about this disk yet to contend */
1955 /* for access to it. */
1956 h->drv[drv_index].busy_configuring = 0;
1957 wmb();
1958 return drv_index;
7fe06326
AP		 1959
1960err_free_disk:
361e9b07 1961 cciss_free_gendisk(h, drv_index);
7fe06326 1962 return -1;
6ae5ce8e
MM		 1963}
1964
1965/* This is for the special case of a controller which
1966 * has no logical drives. In this case, we still need
1967 * to register a disk so the controller can be accessed
1968 * by the Array Config Utility.
1969 */
1970static void cciss_add_controller_node(ctlr_info_t *h)
1971{
1972 struct gendisk *disk;
1973 int drv_index;
1974
1975 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1976 return;
1977
39ccf9a6 1978 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 1979 if (drv_index == -1)
1980 goto error;
6ae5ce8e
MM		 1981 h->drv[drv_index].block_size = 512;
1982 h->drv[drv_index].nr_blocks = 0;
1983 h->drv[drv_index].heads = 0;
1984 h->drv[drv_index].sectors = 0;
1985 h->drv[drv_index].cylinders = 0;
1986 h->drv[drv_index].raid_level = -1;
1987 memset(h->drv[drv_index].serial_no, 0, 16);
1988 disk = h->gendisk[drv_index];
361e9b07
SC		 1989 if (cciss_add_disk(h, disk, drv_index) == 0)
1990 return;
1991 cciss_free_gendisk(h, drv_index);
1992error:
1993 printk(KERN_WARNING "cciss%d: could not "
1994 "add disk 0.\n", h->ctlr);
1995 return;
6ae5ce8e
MM		 1996}
1997
ddd47442 1998/* This function will add and remove logical drives from the Logical
d14c4ab5 1999 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2000 * so that mount points are preserved until the next reboot. This allows
2001 * for the removal of logical drives in the middle of the drive array
2002 * without a re-ordering of those drives.
2003 * INPUT
2004 * h = The controller to perform the operations on
7c832835 2005 */
2d11d993
SC		 2006static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2007 int via_ioctl)
1da177e4 2008{
ddd47442
MM		 2009 int ctlr = h->ctlr;
2010 int num_luns;
2011 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2012 int return_code;
2013 int listlength = 0;
2014 int i;
2015 int drv_found;
2016 int drv_index = 0;
39ccf9a6 2017 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2018 unsigned long flags;
ddd47442 2019
6ae5ce8e
MM		 2020 if (!capable(CAP_SYS_RAWIO))
2021 return -EPERM;
2022
ddd47442
MM		 2023 /* Set busy_configuring flag for this operation */
2024 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2025 if (h->busy_configuring) {
ddd47442
MM		 2026 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2027 return -EBUSY;
2028 }
2029 h->busy_configuring = 1;
a72da29b 2030 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2031
a72da29b
MM		 2032 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2033 if (ld_buff == NULL)
2034 goto mem_msg;
2035
2036 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2037 sizeof(ReportLunData_struct),
2038 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2039
a72da29b
MM		 2040 if (return_code == IO_OK)
2041 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2042 else { /* reading number of logical volumes failed */
2043 printk(KERN_WARNING "cciss: report logical volume"
2044 " command failed\n");
2045 listlength = 0;
2046 goto freeret;
2047 }
2048
2049 num_luns = listlength / 8; /* 8 bytes per entry */
2050 if (num_luns > CISS_MAX_LUN) {
2051 num_luns = CISS_MAX_LUN;
2052 printk(KERN_WARNING "cciss: more luns configured"
2053 " on controller than can be handled by"
2054 " this driver.\n");
2055 }
2056
6ae5ce8e
MM		 2057 if (num_luns == 0)
2058 cciss_add_controller_node(h);
2059
2060 /* Compare controller drive array to driver's drive array
2061 * to see if any drives are missing on the controller due
2062 * to action of Array Config Utility (user deletes drive)
2063 * and deregister logical drives which have disappeared.
2064 */
a72da29b
MM		 2065 for (i = 0; i <= h->highest_lun; i++) {
2066 int j;
2067 drv_found = 0;
d8a0be6a
SC		 2068
2069 /* skip holes in the array from already deleted drives */
2070 if (h->drv[i].raid_level == -1)
2071 continue;
2072
a72da29b 2073 for (j = 0; j < num_luns; j++) {
39ccf9a6
SC		 2074 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2075 if (memcmp(h->drv[i].LunID, lunid,
2076 sizeof(lunid)) == 0) {
a72da29b
MM		 2077 drv_found = 1;
2078 break;
2079 }
2080 }
2081 if (!drv_found) {
2082 /* Deregister it from the OS, it's gone. */
2083 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2084 h->drv[i].busy_configuring = 1;
2085 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2086 return_code = deregister_disk(h, i, 1, via_ioctl);
a72da29b 2087 h->drv[i].busy_configuring = 0;
ddd47442 2088 }
a72da29b 2089 }
ddd47442 2090
a72da29b
MM		 2091 /* Compare controller drive array to driver's drive array.
2092 * Check for updates in the drive information and any new drives
2093 * on the controller due to ACU adding logical drives, or changing
2094 * a logical drive's size, etc. Reregister any new/changed drives
2095 */
2096 for (i = 0; i < num_luns; i++) {
2097 int j;
ddd47442 2098
a72da29b 2099 drv_found = 0;
ddd47442 2100
39ccf9a6 2101 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2102 /* Find if the LUN is already in the drive array
2103 * of the driver. If so then update its info
2104 * if not in use. If it does not exist then find
2105 * the first free index and add it.
2106 */
2107 for (j = 0; j <= h->highest_lun; j++) {
2108 if (h->drv[j].raid_level != -1 &&
39ccf9a6
SC		 2109 memcmp(h->drv[j].LunID, lunid,
2110 sizeof(h->drv[j].LunID)) == 0) {
a72da29b
MM		 2111 drv_index = j;
2112 drv_found = 1;
2113 break;
ddd47442 2114 }
a72da29b 2115 }
ddd47442 2116
a72da29b
MM		 2117 /* check if the drive was found already in the array */
2118 if (!drv_found) {
eece695f 2119 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2120 if (drv_index == -1)
2121 goto freeret;
a72da29b 2122 }
2d11d993
SC		 2123 cciss_update_drive_info(ctlr, drv_index, first_time,
2124 via_ioctl);
a72da29b 2125 } /* end for */
ddd47442 2126
6ae5ce8e 2127freeret:
ddd47442
MM		 2128 kfree(ld_buff);
2129 h->busy_configuring = 0;
2130 /* We return -1 here to tell the ACU that we have registered/updated
2131 * all of the drives that we can and to keep it from calling us
2132 * additional times.
7c832835 2133 */
ddd47442 2134 return -1;
6ae5ce8e 2135mem_msg:
ddd47442 2136 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2137 h->busy_configuring = 0;
ddd47442
MM		 2138 goto freeret;
2139}
2140
9ddb27b4
SC		 2141static void cciss_clear_drive_info(drive_info_struct *drive_info)
2142{
2143 /* zero out the disk size info */
2144 drive_info->nr_blocks = 0;
2145 drive_info->block_size = 0;
2146 drive_info->heads = 0;
2147 drive_info->sectors = 0;
2148 drive_info->cylinders = 0;
2149 drive_info->raid_level = -1;
2150 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2151 memset(drive_info->model, 0, sizeof(drive_info->model));
2152 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2153 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2154 /*
2155 * don't clear the LUNID though, we need to remember which
2156 * one this one is.
2157 */
2158}
2159
ddd47442
MM		 2160/* This function will deregister the disk and it's queue from the
2161 * kernel. It must be called with the controller lock held and the
2162 * drv structures busy_configuring flag set. It's parameters are:
2163 *
2164 * disk = This is the disk to be deregistered
2165 * drv = This is the drive_info_struct associated with the disk to be
2166 * deregistered. It contains information about the disk used
2167 * by the driver.
2168 * clear_all = This flag determines whether or not the disk information
2169 * is going to be completely cleared out and the highest_lun
2170 * reset. Sometimes we want to clear out information about
d14c4ab5 2171 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2172 * the highest_lun should be left unchanged and the LunID
2173 * should not be cleared.
2d11d993
SC		 2174 * via_ioctl
2175 * This indicates whether we've reached this path via ioctl.
2176 * This affects the maximum usage count allowed for c0d0 to be messed with.
2177 * If this path is reached via ioctl(), then the max_usage_count will
2178 * be 1, as the process calling ioctl() has got to have the device open.
2179 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2180*/
a0ea8622 2181static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2182 int clear_all, int via_ioctl)
ddd47442 2183{
799202cb 2184 int i;
a0ea8622
SC		 2185 struct gendisk *disk;
2186 drive_info_struct *drv;
1da177e4
LT		 2187
2188 if (!capable(CAP_SYS_RAWIO))
2189 return -EPERM;
2190
a0ea8622
SC		 2191 drv = &h->drv[drv_index];
2192 disk = h->gendisk[drv_index];
2193
1da177e4 2194 /* make sure logical volume is NOT is use */
7c832835 2195 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2196 if (drv->usage_count > via_ioctl)
7c832835
BH		 2197 return -EBUSY;
2198 } else if (drv->usage_count > 0)
2199 return -EBUSY;
1da177e4 2200
ddd47442
MM		 2201 /* invalidate the devices and deregister the disk. If it is disk
2202 * zero do not deregister it but just zero out it's values. This
2203 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2204 */
2205 if (h->gendisk[0] != disk) {
5a9df732 2206 struct request_queue *q = disk->queue;
097d0264 2207 if (disk->flags & GENHD_FL_UP) {
8ce51966 2208 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2209 del_gendisk(disk);
097d0264 2210 }
5a9df732
AB		 2211 if (q) {
2212 blk_cleanup_queue(q);
2213 /* Set drv->queue to NULL so that we do not try
2214 * to call blk_start_queue on this queue in the
2215 * interrupt handler
2216 */
2217 drv->queue = NULL;
2218 }
2219 /* If clear_all is set then we are deleting the logical
2220 * drive, not just refreshing its info. For drives
2221 * other than disk 0 we will call put_disk. We do not
2222 * do this for disk 0 as we need it to be able to
2223 * configure the controller.
a72da29b 2224 */
5a9df732
AB		 2225 if (clear_all){
2226 /* This isn't pretty, but we need to find the
2227 * disk in our array and NULL our the pointer.
2228 * This is so that we will call alloc_disk if
2229 * this index is used again later.
a72da29b 2230 */
5a9df732 2231 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2232 if (h->gendisk[i] == disk) {
5a9df732
AB		 2233 h->gendisk[i] = NULL;
2234 break;
799202cb 2235 }
799202cb 2236 }
5a9df732 2237 put_disk(disk);
ddd47442 2238 }
799202cb
MM		 2239 } else {
2240 set_capacity(disk, 0);
ddd47442
MM		 2241 }
2242
2243 --h->num_luns;
9ddb27b4
SC		 2244 cciss_clear_drive_info(drv);
2245
7c832835
BH		 2246 if (clear_all) {
2247 /* check to see if it was the last disk */
2248 if (drv == h->drv + h->highest_lun) {
2249 /* if so, find the new hightest lun */
2250 int i, newhighest = -1;
a72da29b 2251 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2252 /* if the disk has size > 0, it is available */
ddd47442 2253 if (h->drv[i].heads)
7c832835
BH		 2254 newhighest = i;
2255 }
2256 h->highest_lun = newhighest;
1da177e4 2257 }
39ccf9a6 2258 memset(drv->LunID, 0, sizeof(drv->LunID));
ddd47442 2259 }
e2019b58 2260 return 0;
1da177e4 2261}
ddd47442 2262
b57695fe 2263static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2264 size_t size, __u8 page_code, unsigned char *scsi3addr,
2265 int cmd_type)
1da177e4 2266{
7c832835 2267 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2268 u64bit buff_dma_handle;
2269 int status = IO_OK;
2270
2271 c->cmd_type = CMD_IOCTL_PEND;
2272 c->Header.ReplyQueue = 0;
7c832835 2273 if (buff != NULL) {
1da177e4 2274 c->Header.SGList = 1;
7c832835 2275 c->Header.SGTotal = 1;
1da177e4
LT		 2276 } else {
2277 c->Header.SGList = 0;
7c832835 2278 c->Header.SGTotal = 0;
1da177e4
LT		 2279 }
2280 c->Header.Tag.lower = c->busaddr;
b57695fe 2281 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2282
2283 c->Request.Type.Type = cmd_type;
2284 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2285 switch (cmd) {
2286 case CISS_INQUIRY:
1da177e4 2287 /* are we trying to read a vital product page */
7c832835 2288 if (page_code != 0) {
1da177e4
LT		 2289 c->Request.CDB[1] = 0x01;
2290 c->Request.CDB[2] = page_code;
2291 }
2292 c->Request.CDBLen = 6;
7c832835 2293 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2294 c->Request.Type.Direction = XFER_READ;
2295 c->Request.Timeout = 0;
7c832835
BH		 2296 c->Request.CDB[0] = CISS_INQUIRY;
2297 c->Request.CDB[4] = size & 0xFF;
2298 break;
1da177e4
LT		 2299 case CISS_REPORT_LOG:
2300 case CISS_REPORT_PHYS:
7c832835 2301 /* Talking to controller so It's a physical command
1da177e4 2302 mode = 00 target = 0. Nothing to write.
7c832835 2303 */
1da177e4
LT		 2304 c->Request.CDBLen = 12;
2305 c->Request.Type.Attribute = ATTR_SIMPLE;
2306 c->Request.Type.Direction = XFER_READ;
2307 c->Request.Timeout = 0;
2308 c->Request.CDB[0] = cmd;
7c832835 2309 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2310 c->Request.CDB[7] = (size >> 16) & 0xFF;
2311 c->Request.CDB[8] = (size >> 8) & 0xFF;
2312 c->Request.CDB[9] = size & 0xFF;
2313 break;
2314
2315 case CCISS_READ_CAPACITY:
1da177e4
LT		 2316 c->Request.CDBLen = 10;
2317 c->Request.Type.Attribute = ATTR_SIMPLE;
2318 c->Request.Type.Direction = XFER_READ;
2319 c->Request.Timeout = 0;
2320 c->Request.CDB[0] = cmd;
7c832835 2321 break;
00988a35 2322 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2323 c->Request.CDBLen = 16;
2324 c->Request.Type.Attribute = ATTR_SIMPLE;
2325 c->Request.Type.Direction = XFER_READ;
2326 c->Request.Timeout = 0;
2327 c->Request.CDB[0] = cmd;
2328 c->Request.CDB[1] = 0x10;
2329 c->Request.CDB[10] = (size >> 24) & 0xFF;
2330 c->Request.CDB[11] = (size >> 16) & 0xFF;
2331 c->Request.CDB[12] = (size >> 8) & 0xFF;
2332 c->Request.CDB[13] = size & 0xFF;
2333 c->Request.Timeout = 0;
2334 c->Request.CDB[0] = cmd;
2335 break;
1da177e4
LT		 2336 case CCISS_CACHE_FLUSH:
2337 c->Request.CDBLen = 12;
2338 c->Request.Type.Attribute = ATTR_SIMPLE;
2339 c->Request.Type.Direction = XFER_WRITE;
2340 c->Request.Timeout = 0;
2341 c->Request.CDB[0] = BMIC_WRITE;
2342 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2343 break;
88f627ae 2344 case TEST_UNIT_READY:
88f627ae
SC		 2345 c->Request.CDBLen = 6;
2346 c->Request.Type.Attribute = ATTR_SIMPLE;
2347 c->Request.Type.Direction = XFER_NONE;
2348 c->Request.Timeout = 0;
2349 break;
1da177e4
LT		 2350 default:
2351 printk(KERN_WARNING
7c832835 2352 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2353 return IO_ERROR;
1da177e4
LT		 2354 }
2355 } else if (cmd_type == TYPE_MSG) {
2356 switch (cmd) {
7c832835 2357 case 0: /* ABORT message */
3da8b713 2358 c->Request.CDBLen = 12;
2359 c->Request.Type.Attribute = ATTR_SIMPLE;
2360 c->Request.Type.Direction = XFER_WRITE;
2361 c->Request.Timeout = 0;
7c832835
BH		 2362 c->Request.CDB[0] = cmd; /* abort */
2363 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2364 /* buff contains the tag of the command to abort */
2365 memcpy(&c->Request.CDB[4], buff, 8);
2366 break;
7c832835 2367 case 1: /* RESET message */
88f627ae 2368 c->Request.CDBLen = 16;
3da8b713 2369 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2370 c->Request.Type.Direction = XFER_NONE;
3da8b713 2371 c->Request.Timeout = 0;
2372 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2373 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2374 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2375 break;
1da177e4
LT		 2376 case 3: /* No-Op message */
2377 c->Request.CDBLen = 1;
2378 c->Request.Type.Attribute = ATTR_SIMPLE;
2379 c->Request.Type.Direction = XFER_WRITE;
2380 c->Request.Timeout = 0;
2381 c->Request.CDB[0] = cmd;
2382 break;
2383 default:
2384 printk(KERN_WARNING
7c832835 2385 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2386 return IO_ERROR;
2387 }
2388 } else {
2389 printk(KERN_WARNING
7c832835 2390 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2391 return IO_ERROR;
2392 }
2393 /* Fill in the scatter gather information */
2394 if (size > 0) {
2395 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2396 buff, size,
2397 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2398 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2399 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2400 c->SG[0].Len = size;
7c832835 2401 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2402 }
2403 return status;
2404}
7c832835 2405
3c2ab402 2406static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2407{
2408 switch (c->err_info->ScsiStatus) {
2409 case SAM_STAT_GOOD:
2410 return IO_OK;
2411 case SAM_STAT_CHECK_CONDITION:
2412 switch (0xf & c->err_info->SenseInfo[2]) {
2413 case 0: return IO_OK; /* no sense */
2414 case 1: return IO_OK; /* recovered error */
2415 default:
2416 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2417 "check condition, sense key = 0x%02x\n",
2418 h->ctlr, c->Request.CDB[0],
2419 c->err_info->SenseInfo[2]);
2420 }
2421 break;
2422 default:
2423 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2424 "scsi status = 0x%02x\n", h->ctlr,
2425 c->Request.CDB[0], c->err_info->ScsiStatus);
2426 break;
2427 }
2428 return IO_ERROR;
2429}
2430
789a424a 2431static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2432{
5390cfc3 2433 int return_status = IO_OK;
7c832835 2434
789a424a 2435 if (c->err_info->CommandStatus == CMD_SUCCESS)
2436 return IO_OK;
5390cfc3 2437
2438 switch (c->err_info->CommandStatus) {
2439 case CMD_TARGET_STATUS:
3c2ab402 2440 return_status = check_target_status(h, c);
5390cfc3 2441 break;
2442 case CMD_DATA_UNDERRUN:
2443 case CMD_DATA_OVERRUN:
2444 /* expected for inquiry and report lun commands */
2445 break;
2446 case CMD_INVALID:
789a424a 2447 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2448 "reported invalid\n", c->Request.CDB[0]);
2449 return_status = IO_ERROR;
2450 break;
2451 case CMD_PROTOCOL_ERR:
2452 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2453 "protocol error \n", c->Request.CDB[0]);
2454 return_status = IO_ERROR;
2455 break;
2456 case CMD_HARDWARE_ERR:
2457 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2458 " hardware error\n", c->Request.CDB[0]);
2459 return_status = IO_ERROR;
2460 break;
2461 case CMD_CONNECTION_LOST:
2462 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2463 "connection lost\n", c->Request.CDB[0]);
2464 return_status = IO_ERROR;
2465 break;
2466 case CMD_ABORTED:
2467 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2468 "aborted\n", c->Request.CDB[0]);
2469 return_status = IO_ERROR;
2470 break;
2471 case CMD_ABORT_FAILED:
2472 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2473 "abort failed\n", c->Request.CDB[0]);
2474 return_status = IO_ERROR;
2475 break;
2476 case CMD_UNSOLICITED_ABORT:
2477 printk(KERN_WARNING
2478 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2479 c->Request.CDB[0]);
789a424a 2480 return_status = IO_NEEDS_RETRY;
5390cfc3 2481 break;
2482 default:
2483 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2484 "unknown status %x\n", c->Request.CDB[0],
2485 c->err_info->CommandStatus);
2486 return_status = IO_ERROR;
7c832835 2487 }
789a424a 2488 return return_status;
2489}
2490
2491static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2492 int attempt_retry)
2493{
2494 DECLARE_COMPLETION_ONSTACK(wait);
2495 u64bit buff_dma_handle;
2496 unsigned long flags;
2497 int return_status = IO_OK;
2498
2499resend_cmd2:
2500 c->waiting = &wait;
2501 /* Put the request on the tail of the queue and send it */
2502 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2503 addQ(&h->reqQ, c);
2504 h->Qdepth++;
2505 start_io(h);
2506 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2507
2508 wait_for_completion(&wait);
2509
2510 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2511 goto command_done;
2512
2513 return_status = process_sendcmd_error(h, c);
2514
2515 if (return_status == IO_NEEDS_RETRY &&
2516 c->retry_count < MAX_CMD_RETRIES) {
2517 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2518 c->Request.CDB[0]);
2519 c->retry_count++;
2520 /* erase the old error information */
2521 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2522 return_status = IO_OK;
2523 INIT_COMPLETION(wait);
2524 goto resend_cmd2;
2525 }
5390cfc3 2526
2527command_done:
1da177e4 2528 /* unlock the buffers from DMA */
bb2a37bf
MM		 2529 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2530 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2531 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2532 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2533 return return_status;
2534}
2535
b57695fe 2536static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2537 __u8 page_code, unsigned char scsi3addr[],
2538 int cmd_type)
5390cfc3 2539{
2540 ctlr_info_t *h = hba[ctlr];
2541 CommandList_struct *c;
2542 int return_status;
2543
2544 c = cmd_alloc(h, 0);
2545 if (!c)
2546 return -ENOMEM;
b57695fe 2547 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2548 scsi3addr, cmd_type);
5390cfc3 2549 if (return_status == IO_OK)
789a424a 2550 return_status = sendcmd_withirq_core(h, c, 1);
2551
1da177e4 2552 cmd_free(h, c, 0);
7c832835 2553 return return_status;
1da177e4 2554}
7c832835 2555
1da177e4 2556static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2557 int withirq, sector_t total_size,
7c832835
BH		 2558 unsigned int block_size,
2559 InquiryData_struct *inq_buff,
2560 drive_info_struct *drv)
1da177e4
LT		 2561{
2562 int return_code;
00988a35 2563 unsigned long t;
b57695fe 2564 unsigned char scsi3addr[8];
00988a35 2565
1da177e4 2566 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2567 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2568 if (withirq)
2569 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2570 inq_buff, sizeof(*inq_buff),
2571 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2572 else
2573 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2574 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2575 TYPE_CMD);
1da177e4 2576 if (return_code == IO_OK) {
7c832835 2577 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2578 printk(KERN_WARNING
7c832835
BH		 2579 "cciss: reading geometry failed, volume "
2580 "does not support reading geometry\n");
1da177e4 2581 drv->heads = 255;
7c832835 2582 drv->sectors = 32; // Sectors per track
7f42d3b8 2583 drv->cylinders = total_size + 1;
89f97ad1 2584 drv->raid_level = RAID_UNKNOWN;
1da177e4 2585 } else {
1da177e4
LT		 2586 drv->heads = inq_buff->data_byte[6];
2587 drv->sectors = inq_buff->data_byte[7];
2588 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2589 drv->cylinders += inq_buff->data_byte[5];
2590 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2591 }
2592 drv->block_size = block_size;
97c06978 2593 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2594 t = drv->heads * drv->sectors;
2595 if (t > 1) {
97c06978
MMOD		 2596 sector_t real_size = total_size + 1;
2597 unsigned long rem = sector_div(real_size, t);
3f7705ea 2598 if (rem)
97c06978
MMOD		 2599 real_size++;
2600 drv->cylinders = real_size;
1da177e4 2601 }
7c832835 2602 } else { /* Get geometry failed */
1da177e4
LT		 2603 printk(KERN_WARNING "cciss: reading geometry failed\n");
2604 }
1da177e4 2605}
7c832835 2606
1da177e4 2607static void
00988a35 2608cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2609 unsigned int *block_size)
1da177e4 2610{
00988a35 2611 ReadCapdata_struct *buf;
1da177e4 2612 int return_code;
b57695fe 2613 unsigned char scsi3addr[8];
1aebe187
MK		 2614
2615 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2616 if (!buf) {
00988a35
MMOD		 2617 printk(KERN_WARNING "cciss: out of memory\n");
2618 return;
2619 }
1aebe187 2620
b57695fe 2621 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2622 if (withirq)
2623 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2624 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2625 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2626 else
2627 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2628 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2629 0, scsi3addr, TYPE_CMD);
1da177e4 2630 if (return_code == IO_OK) {
4c1f2b31
AV		 2631 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2632 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2633 } else { /* read capacity command failed */
1da177e4
LT		 2634 printk(KERN_WARNING "cciss: read capacity failed\n");
2635 *total_size = 0;
2636 *block_size = BLOCK_SIZE;
2637 }
00988a35 2638 kfree(buf);
00988a35
MMOD		 2639}
2640
2641static void
2642cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2643{
2644 ReadCapdata_struct_16 *buf;
2645 int return_code;
b57695fe 2646 unsigned char scsi3addr[8];
1aebe187
MK		 2647
2648 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2649 if (!buf) {
00988a35
MMOD		 2650 printk(KERN_WARNING "cciss: out of memory\n");
2651 return;
2652 }
1aebe187 2653
b57695fe 2654 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2655 if (withirq) {
2656 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2657 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2658 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2659 }
2660 else {
2661 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2662 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2663 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2664 }
2665 if (return_code == IO_OK) {
4c1f2b31
AV		 2666 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2667 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2668 } else { /* read capacity command failed */
2669 printk(KERN_WARNING "cciss: read capacity failed\n");
2670 *total_size = 0;
2671 *block_size = BLOCK_SIZE;
2672 }
7b92aadf 2673 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2674 (unsigned long long)*total_size+1, *block_size);
00988a35 2675 kfree(buf);
1da177e4
LT		 2676}
2677
1da177e4
LT		 2678static int cciss_revalidate(struct gendisk *disk)
2679{
2680 ctlr_info_t *h = get_host(disk);
2681 drive_info_struct *drv = get_drv(disk);
2682 int logvol;
7c832835 2683 int FOUND = 0;
1da177e4 2684 unsigned int block_size;
00988a35 2685 sector_t total_size;
1da177e4
LT		 2686 InquiryData_struct *inq_buff = NULL;
2687
7c832835 2688 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
39ccf9a6
SC		 2689 if (memcmp(h->drv[logvol].LunID, drv->LunID,
2690 sizeof(drv->LunID)) == 0) {
7c832835 2691 FOUND = 1;
1da177e4
LT		 2692 break;
2693 }
2694 }
2695
7c832835
BH		 2696 if (!FOUND)
2697 return 1;
1da177e4 2698
7c832835
BH		 2699 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2700 if (inq_buff == NULL) {
2701 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2702 return 1;
2703 }
00988a35
MMOD		 2704 if (h->cciss_read == CCISS_READ_10) {
2705 cciss_read_capacity(h->ctlr, logvol, 1,
2706 &total_size, &block_size);
2707 } else {
2708 cciss_read_capacity_16(h->ctlr, logvol, 1,
2709 &total_size, &block_size);
2710 }
7c832835
BH		 2711 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2712 inq_buff, drv);
1da177e4 2713
e1defc4f 2714 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2715 set_capacity(disk, drv->nr_blocks);
2716
1da177e4
LT		 2717 kfree(inq_buff);
2718 return 0;
2719}
2720
2721/*
2722 * Wait polling for a command to complete.
2723 * The memory mapped FIFO is polled for the completion.
2724 * Used only at init time, interrupts from the HBA are disabled.
2725 */
2726static unsigned long pollcomplete(int ctlr)
2727{
2728 unsigned long done;
2729 int i;
2730
2731 /* Wait (up to 20 seconds) for a command to complete */
2732
2733 for (i = 20 * HZ; i > 0; i--) {
2734 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2735 if (done == FIFO_EMPTY)
2736 schedule_timeout_uninterruptible(1);
2737 else
e2019b58 2738 return done;
1da177e4
LT		 2739 }
2740 /* Invalid address to tell caller we ran out of time */
2741 return 1;
2742}
3da8b713 2743
4a4b2d76
SC		 2744/* Send command c to controller h and poll for it to complete.
2745 * Turns interrupts off on the board. Used at driver init time
2746 * and during SCSI error recovery.
1da177e4 2747 */
4a4b2d76 2748static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2749{
1da177e4
LT		 2750 int i;
2751 unsigned long complete;
4a4b2d76 2752 int status = IO_ERROR;
1da177e4 2753 u64bit buff_dma_handle;
1da177e4 2754
4a4b2d76
SC		 2755resend_cmd1:
2756
2757 /* Disable interrupt on the board. */
2758 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2759
1da177e4 2760 /* Make sure there is room in the command FIFO */
7c832835 2761 /* Actually it should be completely empty at this time */
3da8b713 2762 /* unless we are in here doing error handling for the scsi */
2763 /* tape side of the driver. */
7c832835 2764 for (i = 200000; i > 0; i--) {
1da177e4 2765 /* if fifo isn't full go */
4a4b2d76 2766 if (!(h->access.fifo_full(h)))
7c832835 2767 break;
7c832835
BH		 2768 udelay(10);
2769 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2770 " waiting!\n", h->ctlr);
7c832835 2771 }
4a4b2d76 2772 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2773 do {
4a4b2d76 2774 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2775
2776#ifdef CCISS_DEBUG
3da8b713 2777 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2778#endif /* CCISS_DEBUG */
1da177e4 2779
3da8b713 2780 if (complete == 1) {
7c832835
BH		 2781 printk(KERN_WARNING
2782 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2783 "No command list address returned!\n", h->ctlr);
3da8b713 2784 status = IO_ERROR;
3da8b713 2785 break;
2786 }
2787
72f9f132 2788 /* Make sure it's the command we're expecting. */
4a4b2d76 2789 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2790 printk(KERN_WARNING "cciss%d: Unexpected command "
2791 "completion.\n", h->ctlr);
4a4b2d76
SC		 2792 continue;
2793 }
2794
2795 /* It is our command. If no error, we're done. */
2796 if (!(complete & CISS_ERROR_BIT)) {
2797 status = IO_OK;
2798 break;
2799 }
2800
2801 /* There is an error... */
2802
2803 /* if data overrun or underun on Report command ignore it */
2804 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2805 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2806 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2807 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2808 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2809 complete = c->busaddr;
2810 status = IO_OK;
2811 break;
1da177e4 2812 }
4a4b2d76
SC		 2813
2814 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2815 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2816 h->ctlr, c);
2817 if (c->retry_count < MAX_CMD_RETRIES) {
2818 printk(KERN_WARNING "cciss%d: retrying %p\n",
2819 h->ctlr, c);
2820 c->retry_count++;
2821 /* erase the old error information */
2822 memset(c->err_info, 0, sizeof(c->err_info));
2823 goto resend_cmd1;
3da8b713 2824 }
4a4b2d76
SC		 2825 printk(KERN_WARNING "cciss%d: retried %p too many "
2826 "times\n", h->ctlr, c);
2827 status = IO_ERROR;
3c2ab402 2828 break;
4a4b2d76
SC		 2829 }
2830
2831 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2832 printk(KERN_WARNING "cciss%d: command could not be "
2833 "aborted.\n", h->ctlr);
2834 status = IO_ERROR;
3c2ab402 2835 break;
4a4b2d76
SC		 2836 }
2837
4a4b2d76 2838 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2839 status = check_target_status(h, c);
2840 break;
4a4b2d76
SC		 2841 }
2842
3c2ab402 2843 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2844 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2845 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2846 status = IO_ERROR;
3c2ab402 2847 break;
4a4b2d76
SC		 2848
2849 } while (1);
7c832835 2850
1da177e4 2851 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2852 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2853 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2854 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2855 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2856 return status;
2857}
2858
2859/*
2860 * Send a command to the controller, and wait for it to complete.
2861 * Used at init time, and during SCSI error recovery.
2862 */
2863static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2864 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2865{
2866 CommandList_struct *c;
2867 int status;
2868
2869 c = cmd_alloc(hba[ctlr], 1);
2870 if (!c) {
2871 printk(KERN_WARNING "cciss: unable to get memory");
2872 return IO_ERROR;
2873 }
b57695fe 2874 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2875 scsi3addr, cmd_type);
4a4b2d76
SC		 2876 if (status == IO_OK)
2877 status = sendcmd_core(hba[ctlr], c);
2878 cmd_free(hba[ctlr], c, 1);
e2019b58 2879 return status;
7c832835
BH		 2880}
2881
1da177e4
LT		 2882/*
2883 * Map (physical) PCI mem into (virtual) kernel space
2884 */
2885static void __iomem *remap_pci_mem(ulong base, ulong size)
2886{
7c832835
BH		 2887 ulong page_base = ((ulong) base) & PAGE_MASK;
2888 ulong page_offs = ((ulong) base) - page_base;
2889 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2890
7c832835 2891 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2892}
2893
7c832835
BH		 2894/*
2895 * Takes jobs of the Q and sends them to the hardware, then puts it on
2896 * the Q to wait for completion.
2897 */
2898static void start_io(ctlr_info_t *h)
1da177e4
LT		 2899{
2900 CommandList_struct *c;
7c832835 2901
8a3173de
JA		 2902 while (!hlist_empty(&h->reqQ)) {
2903 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2904 /* can't do anything if fifo is full */
2905 if ((h->access.fifo_full(h))) {
2906 printk(KERN_WARNING "cciss: fifo full\n");
2907 break;
2908 }
2909
7c832835 2910 /* Get the first entry from the Request Q */
8a3173de 2911 removeQ(c);
1da177e4 2912 h->Qdepth--;
7c832835
BH		 2913
2914 /* Tell the controller execute command */
1da177e4 2915 h->access.submit_command(h, c);
7c832835
BH		 2916
2917 /* Put job onto the completed Q */
8a3173de 2918 addQ(&h->cmpQ, c);
1da177e4
LT		 2919 }
2920}
7c832835 2921
1da177e4
LT		 2922/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2923/* Zeros out the error record and then resends the command back */
2924/* to the controller */
7c832835 2925static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2926{
2927 /* erase the old error information */
2928 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2929
2930 /* add it to software queue and then send it to the controller */
8a3173de 2931 addQ(&h->reqQ, c);
1da177e4 2932 h->Qdepth++;
7c832835 2933 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2934 h->maxQsinceinit = h->Qdepth;
2935
2936 start_io(h);
2937}
a9925a06 2938
1a614f50
SC		 2939static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2940 unsigned int msg_byte, unsigned int host_byte,
2941 unsigned int driver_byte)
2942{
2943 /* inverse of macros in scsi.h */
2944 return (scsi_status_byte & 0xff) |
2945 ((msg_byte & 0xff) << 8) |
2946 ((host_byte & 0xff) << 16) |
2947 ((driver_byte & 0xff) << 24);
2948}
2949
0a9279cc
MM		 2950static inline int evaluate_target_status(ctlr_info_t *h,
2951 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2952{
2953 unsigned char sense_key;
1a614f50
SC		 2954 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2955 int error_value;
2956
0a9279cc 2957 *retry_cmd = 0;
1a614f50
SC		 2958 /* If we get in here, it means we got "target status", that is, scsi status */
2959 status_byte = cmd->err_info->ScsiStatus;
2960 driver_byte = DRIVER_OK;
2961 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2962
2963 if (blk_pc_request(cmd->rq))
2964 host_byte = DID_PASSTHROUGH;
2965 else
2966 host_byte = DID_OK;
2967
2968 error_value = make_status_bytes(status_byte, msg_byte,
2969 host_byte, driver_byte);
03bbfee5 2970
1a614f50 2971 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2972 if (!blk_pc_request(cmd->rq))
2973 printk(KERN_WARNING "cciss: cmd %p "
2974 "has SCSI Status 0x%x\n",
2975 cmd, cmd->err_info->ScsiStatus);
1a614f50 2976 return error_value;
03bbfee5
MMOD		 2977 }
2978
2979 /* check the sense key */
2980 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2981 /* no status or recovered error */
1a614f50
SC		 2982 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2983 error_value = 0;
03bbfee5 2984
0a9279cc
MM		 2985 if (check_for_unit_attention(h, cmd)) {
2986 *retry_cmd = !blk_pc_request(cmd->rq);
2987 return 0;
2988 }
2989
03bbfee5 2990 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2991 if (error_value != 0)
03bbfee5
MMOD		 2992 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2993 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2994 return error_value;
03bbfee5
MMOD		 2995 }
2996
2997 /* SG_IO or similar, copy sense data back */
2998 if (cmd->rq->sense) {
2999 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3000 cmd->rq->sense_len = cmd->err_info->SenseLen;
3001 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3002 cmd->rq->sense_len);
3003 } else
3004 cmd->rq->sense_len = 0;
3005
1a614f50 3006 return error_value;
03bbfee5
MMOD		 3007}
3008
7c832835 3009/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3010 * buffers for the completed job. Note that this function does not need
3011 * to hold the hba/queue lock.
7c832835
BH		 3012 */
3013static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3014 int timeout)
1da177e4 3015{
1da177e4 3016 int retry_cmd = 0;
198b7660
MMOD		 3017 struct request *rq = cmd->rq;
3018
3019 rq->errors = 0;
7c832835 3020
1da177e4 3021 if (timeout)
1a614f50 3022 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3023
d38ae168
MMOD		 3024 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3025 goto after_error_processing;
7c832835 3026
d38ae168 3027 switch (cmd->err_info->CommandStatus) {
d38ae168 3028 case CMD_TARGET_STATUS:
0a9279cc 3029 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3030 break;
3031 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3032 if (blk_fs_request(cmd->rq)) {
3033 printk(KERN_WARNING "cciss: cmd %p has"
3034 " completed with data underrun "
3035 "reported\n", cmd);
c3a4d78c 3036 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3037 }
d38ae168
MMOD		 3038 break;
3039 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3040 if (blk_fs_request(cmd->rq))
3041 printk(KERN_WARNING "cciss: cmd %p has"
3042 " completed with data overrun "
3043 "reported\n", cmd);
d38ae168
MMOD		 3044 break;
3045 case CMD_INVALID:
3046 printk(KERN_WARNING "cciss: cmd %p is "
3047 "reported invalid\n", cmd);
1a614f50
SC		 3048 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3049 cmd->err_info->CommandStatus, DRIVER_OK,
3050 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3051 break;
3052 case CMD_PROTOCOL_ERR:
3053 printk(KERN_WARNING "cciss: cmd %p has "
3054 "protocol error \n", cmd);
1a614f50
SC		 3055 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3056 cmd->err_info->CommandStatus, DRIVER_OK,
3057 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3058 break;
3059 case CMD_HARDWARE_ERR:
3060 printk(KERN_WARNING "cciss: cmd %p had "
3061 " hardware error\n", cmd);
1a614f50
SC		 3062 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3063 cmd->err_info->CommandStatus, DRIVER_OK,
3064 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3065 break;
3066 case CMD_CONNECTION_LOST:
3067 printk(KERN_WARNING "cciss: cmd %p had "
3068 "connection lost\n", cmd);
1a614f50
SC		 3069 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3070 cmd->err_info->CommandStatus, DRIVER_OK,
3071 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3072 break;
3073 case CMD_ABORTED:
3074 printk(KERN_WARNING "cciss: cmd %p was "
3075 "aborted\n", cmd);
1a614f50
SC		 3076 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3077 cmd->err_info->CommandStatus, DRIVER_OK,
3078 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3079 break;
3080 case CMD_ABORT_FAILED:
3081 printk(KERN_WARNING "cciss: cmd %p reports "
3082 "abort failed\n", cmd);
1a614f50
SC		 3083 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3084 cmd->err_info->CommandStatus, DRIVER_OK,
3085 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3086 break;
3087 case CMD_UNSOLICITED_ABORT:
3088 printk(KERN_WARNING "cciss%d: unsolicited "
3089 "abort %p\n", h->ctlr, cmd);
3090 if (cmd->retry_count < MAX_CMD_RETRIES) {
3091 retry_cmd = 1;
3092 printk(KERN_WARNING
3093 "cciss%d: retrying %p\n", h->ctlr, cmd);
3094 cmd->retry_count++;
3095 } else
3096 printk(KERN_WARNING
3097 "cciss%d: %p retried too "
3098 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3099 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3100 cmd->err_info->CommandStatus, DRIVER_OK,
3101 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3102 break;
3103 case CMD_TIMEOUT:
3104 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3105 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3106 cmd->err_info->CommandStatus, DRIVER_OK,
3107 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3108 break;
3109 default:
3110 printk(KERN_WARNING "cciss: cmd %p returned "
3111 "unknown status %x\n", cmd,
3112 cmd->err_info->CommandStatus);
1a614f50
SC		 3113 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3114 cmd->err_info->CommandStatus, DRIVER_OK,
3115 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3116 }
d38ae168
MMOD		 3117
3118after_error_processing:
3119
1da177e4 3120 /* We need to return this command */
7c832835
BH		 3121 if (retry_cmd) {
3122 resend_cciss_cmd(h, cmd);
1da177e4 3123 return;
7c832835 3124 }
03bbfee5 3125 cmd->rq->completion_data = cmd;
a9925a06 3126 blk_complete_request(cmd->rq);
1da177e4
LT		 3127}
3128
7c832835
BH		 3129/*
3130 * Get a request and submit it to the controller.
1da177e4 3131 */
165125e1 3132static void do_cciss_request(struct request_queue *q)
1da177e4 3133{
7c832835 3134 ctlr_info_t *h = q->queuedata;
1da177e4 3135 CommandList_struct *c;
00988a35
MMOD		 3136 sector_t start_blk;
3137 int seg;
1da177e4
LT		 3138 struct request *creq;
3139 u64bit temp64;
3140 struct scatterlist tmp_sg[MAXSGENTRIES];
3141 drive_info_struct *drv;
3142 int i, dir;
3143
3144 /* We call start_io here in case there is a command waiting on the
3145 * queue that has not been sent.
7c832835 3146 */
1da177e4
LT		 3147 if (blk_queue_plugged(q))
3148 goto startio;
3149
7c832835 3150 queue:
9934c8c0 3151 creq = blk_peek_request(q);
1da177e4
LT		 3152 if (!creq)
3153 goto startio;
3154
089fe1b2 3155 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3156
7c832835 3157 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3158 goto full;
3159
9934c8c0 3160 blk_start_request(creq);
1da177e4
LT		 3161
3162 spin_unlock_irq(q->queue_lock);
3163
3164 c->cmd_type = CMD_RWREQ;
3165 c->rq = creq;
7c832835
BH		 3166
3167 /* fill in the request */
1da177e4 3168 drv = creq->rq_disk->private_data;
7c832835 3169 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3170 /* got command from pool, so use the command block index instead */
3171 /* for direct lookups. */
3172 /* The first 2 bits are reserved for controller error reporting. */
3173 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3174 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3175 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
7c832835
BH		 3176 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3177 c->Request.Type.Type = TYPE_CMD; // It is a command.
3178 c->Request.Type.Attribute = ATTR_SIMPLE;
3179 c->Request.Type.Direction =
a52de245 3180 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3181 c->Request.Timeout = 0; // Don't time out
3182 c->Request.CDB[0] =
00988a35 3183 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3184 start_blk = blk_rq_pos(creq);
1da177e4 3185#ifdef CCISS_DEBUG
83096ebf
TH		 3186 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3187 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3188#endif /* CCISS_DEBUG */
1da177e4 3189
45711f1a 3190 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3191 seg = blk_rq_map_sg(q, creq, tmp_sg);
3192
7c832835 3193 /* get the DMA records for the setup */
1da177e4
LT		 3194 if (c->Request.Type.Direction == XFER_READ)
3195 dir = PCI_DMA_FROMDEVICE;
3196 else
3197 dir = PCI_DMA_TODEVICE;
3198
7c832835 3199 for (i = 0; i < seg; i++) {
1da177e4 3200 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3201 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3202 tmp_sg[i].offset,
3203 tmp_sg[i].length, dir);
1da177e4 3204 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3205 c->SG[i].Addr.upper = temp64.val32.upper;
3206 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3207 }
7c832835
BH		 3208 /* track how many SG entries we are using */
3209 if (seg > h->maxSG)
3210 h->maxSG = seg;
1da177e4
LT		 3211
3212#ifdef CCISS_DEBUG
83096ebf
TH		 3213 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3214 blk_rq_sectors(creq), seg);
7c832835 3215#endif /* CCISS_DEBUG */
1da177e4
LT		 3216
3217 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3218 if (likely(blk_fs_request(creq))) {
3219 if(h->cciss_read == CCISS_READ_10) {
3220 c->Request.CDB[1] = 0;
3221 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3222 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3223 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3224 c->Request.CDB[5] = start_blk & 0xff;
3225 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3226 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3227 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3228 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3229 } else {
582539e5
RD		 3230 u32 upper32 = upper_32_bits(start_blk);
3231
03bbfee5
MMOD		 3232 c->Request.CDBLen = 16;
3233 c->Request.CDB[1]= 0;
582539e5
RD		 3234 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3235 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3236 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3237 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3238 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3239 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3240 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3241 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3242 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3243 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3244 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3245 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3246 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3247 }
3248 } else if (blk_pc_request(creq)) {
3249 c->Request.CDBLen = creq->cmd_len;
3250 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3251 } else {
03bbfee5
MMOD		 3252 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3253 BUG();
00988a35 3254 }
1da177e4
LT		 3255
3256 spin_lock_irq(q->queue_lock);
3257
8a3173de 3258 addQ(&h->reqQ, c);
1da177e4 3259 h->Qdepth++;
7c832835
BH		 3260 if (h->Qdepth > h->maxQsinceinit)
3261 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3262
3263 goto queue;
00988a35 3264full:
1da177e4 3265 blk_stop_queue(q);
00988a35 3266startio:
1da177e4
LT		 3267 /* We will already have the driver lock here so not need
3268 * to lock it.
7c832835 3269 */
1da177e4
LT		 3270 start_io(h);
3271}
3272
3da8b713 3273static inline unsigned long get_next_completion(ctlr_info_t *h)
3274{
3da8b713 3275 return h->access.command_completed(h);
3da8b713 3276}
3277
3278static inline int interrupt_pending(ctlr_info_t *h)
3279{
3da8b713 3280 return h->access.intr_pending(h);
3da8b713 3281}
3282
3283static inline long interrupt_not_for_us(ctlr_info_t *h)
3284{
7c832835 3285 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3286 (h->interrupts_enabled == 0)));
3da8b713 3287}
3288
7d12e780 3289static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3290{
3291 ctlr_info_t *h = dev_id;
3292 CommandList_struct *c;
3293 unsigned long flags;
33079b21 3294 __u32 a, a1, a2;
1da177e4 3295
3da8b713 3296 if (interrupt_not_for_us(h))
1da177e4 3297 return IRQ_NONE;
1da177e4
LT		 3298 /*
3299 * If there are completed commands in the completion queue,
3300 * we had better do something about it.
3301 */
3302 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3303 while (interrupt_pending(h)) {
7c832835 3304 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3305 a1 = a;
33079b21
MM		 3306 if ((a & 0x04)) {
3307 a2 = (a >> 3);
f880632f 3308 if (a2 >= h->nr_cmds) {
7c832835
BH		 3309 printk(KERN_WARNING
3310 "cciss: controller cciss%d failed, stopping.\n",
3311 h->ctlr);
33079b21
MM		 3312 fail_all_cmds(h->ctlr);
3313 return IRQ_HANDLED;
3314 }
3315
3316 c = h->cmd_pool + a2;
3317 a = c->busaddr;
3318
3319 } else {
8a3173de
JA		 3320 struct hlist_node *tmp;
3321
7c832835 3322 a &= ~3;
8a3173de
JA		 3323 c = NULL;
3324 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3325 if (c->busaddr == a)
7c832835
BH		 3326 break;
3327 }
33079b21 3328 }
1da177e4
LT		 3329 /*
3330 * If we've found the command, take it off the
3331 * completion Q and free it
3332 */
8a3173de
JA		 3333 if (c && c->busaddr == a) {
3334 removeQ(c);
1da177e4
LT		 3335 if (c->cmd_type == CMD_RWREQ) {
3336 complete_command(h, c, 0);
3337 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3338 complete(c->waiting);
3339 }
3340# ifdef CONFIG_CISS_SCSI_TAPE
3341 else if (c->cmd_type == CMD_SCSI)
3342 complete_scsi_command(c, 0, a1);
3343# endif
3344 continue;
3345 }
3346 }
3347 }
3348
1da177e4
LT		 3349 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3350 return IRQ_HANDLED;
3351}
7c832835 3352
b368c9dd
AP		 3353/**
3354 * add_to_scan_list() - add controller to rescan queue
3355 * @h: Pointer to the controller.
3356 *
3357 * Adds the controller to the rescan queue if not already on the queue.
3358 *
3359 * returns 1 if added to the queue, 0 if skipped (could be on the
3360 * queue already, or the controller could be initializing or shutting
3361 * down).
3362 **/
3363static int add_to_scan_list(struct ctlr_info *h)
3364{
3365 struct ctlr_info *test_h;
3366 int found = 0;
3367 int ret = 0;
3368
3369 if (h->busy_initializing)
3370 return 0;
3371
3372 if (!mutex_trylock(&h->busy_shutting_down))
3373 return 0;
3374
3375 mutex_lock(&scan_mutex);
3376 list_for_each_entry(test_h, &scan_q, scan_list) {
3377 if (test_h == h) {
3378 found = 1;
3379 break;
3380 }
3381 }
3382 if (!found && !h->busy_scanning) {
3383 INIT_COMPLETION(h->scan_wait);
3384 list_add_tail(&h->scan_list, &scan_q);
3385 ret = 1;
3386 }
3387 mutex_unlock(&scan_mutex);
3388 mutex_unlock(&h->busy_shutting_down);
3389
3390 return ret;
3391}
3392
3393/**
3394 * remove_from_scan_list() - remove controller from rescan queue
3395 * @h: Pointer to the controller.
3396 *
3397 * Removes the controller from the rescan queue if present. Blocks if
3398 * the controller is currently conducting a rescan.
3399 **/
3400static void remove_from_scan_list(struct ctlr_info *h)
3401{
3402 struct ctlr_info *test_h, *tmp_h;
3403 int scanning = 0;
3404
3405 mutex_lock(&scan_mutex);
3406 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3407 if (test_h == h) {
3408 list_del(&h->scan_list);
3409 complete_all(&h->scan_wait);
3410 mutex_unlock(&scan_mutex);
3411 return;
3412 }
3413 }
3414 if (&h->busy_scanning)
3415 scanning = 0;
3416 mutex_unlock(&scan_mutex);
3417
3418 if (scanning)
3419 wait_for_completion(&h->scan_wait);
3420}
3421
3422/**
3423 * scan_thread() - kernel thread used to rescan controllers
3424 * @data: Ignored.
3425 *
3426 * A kernel thread used scan for drive topology changes on
3427 * controllers. The thread processes only one controller at a time
3428 * using a queue. Controllers are added to the queue using
3429 * add_to_scan_list() and removed from the queue either after done
3430 * processing or using remove_from_scan_list().
3431 *
3432 * returns 0.
3433 **/
0a9279cc
MM		 3434static int scan_thread(void *data)
3435{
b368c9dd 3436 struct ctlr_info *h;
0a9279cc 3437
b368c9dd
AP		 3438 while (1) {
3439 set_current_state(TASK_INTERRUPTIBLE);
3440 schedule();
0a9279cc
MM		 3441 if (kthread_should_stop())
3442 break;
b368c9dd
AP		 3443
3444 while (1) {
3445 mutex_lock(&scan_mutex);
3446 if (list_empty(&scan_q)) {
3447 mutex_unlock(&scan_mutex);
3448 break;
3449 }
3450
3451 h = list_entry(scan_q.next,
3452 struct ctlr_info,
3453 scan_list);
3454 list_del(&h->scan_list);
3455 h->busy_scanning = 1;
3456 mutex_unlock(&scan_mutex);
3457
3458 if (h) {
2d11d993 3459 rebuild_lun_table(h, 0, 0);
b368c9dd
AP		 3460 complete_all(&h->scan_wait);
3461 mutex_lock(&scan_mutex);
3462 h->busy_scanning = 0;
3463 mutex_unlock(&scan_mutex);
3464 }
3465 }
0a9279cc 3466 }
b368c9dd 3467
0a9279cc
MM		 3468 return 0;
3469}
3470
3471static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3472{
3473 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3474 return 0;
3475
3476 switch (c->err_info->SenseInfo[12]) {
3477 case STATE_CHANGED:
3478 printk(KERN_WARNING "cciss%d: a state change "
3479 "detected, command retried\n", h->ctlr);
3480 return 1;
3481 break;
3482 case LUN_FAILED:
3483 printk(KERN_WARNING "cciss%d: LUN failure "
3484 "detected, action required\n", h->ctlr);
3485 return 1;
3486 break;
3487 case REPORT_LUNS_CHANGED:
3488 printk(KERN_WARNING "cciss%d: report LUN data "
3489 "changed\n", h->ctlr);
b368c9dd
AP		 3490 add_to_scan_list(h);
3491 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3492 return 1;
3493 break;
3494 case POWER_OR_RESET:
3495 printk(KERN_WARNING "cciss%d: a power on "
3496 "or device reset detected\n", h->ctlr);
3497 return 1;
3498 break;
3499 case UNIT_ATTENTION_CLEARED:
3500 printk(KERN_WARNING "cciss%d: unit attention "
3501 "cleared by another initiator\n", h->ctlr);
3502 return 1;
3503 break;
3504 default:
3505 printk(KERN_WARNING "cciss%d: unknown "
3506 "unit attention detected\n", h->ctlr);
3507 return 1;
3508 }
3509}
3510
7c832835 3511/*
d14c4ab5 3512 * We cannot read the structure directly, for portability we must use
1da177e4 3513 * the io functions.
7c832835 3514 * This is for debug only.
1da177e4
LT		 3515 */
3516#ifdef CCISS_DEBUG
7c832835 3517static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3518{
3519 int i;
3520 char temp_name[17];
3521
3522 printk("Controller Configuration information\n");
3523 printk("------------------------------------\n");
7c832835 3524 for (i = 0; i < 4; i++)
1da177e4 3525 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3526 temp_name[4] = '\0';
3527 printk(" Signature = %s\n", temp_name);
1da177e4 3528 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3529 printk(" Transport methods supported = 0x%x\n",
3530 readl(&(tb->TransportSupport)));
3531 printk(" Transport methods active = 0x%x\n",
3532 readl(&(tb->TransportActive)));
3533 printk(" Requested transport Method = 0x%x\n",
3534 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3535 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3536 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3537 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3538 readl(&(tb->HostWrite.CoalIntCount)));
3539 printk(" Max outstanding commands = 0x%d\n",
3540 readl(&(tb->CmdsOutMax)));
3541 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3542 for (i = 0; i < 16; i++)
1da177e4
LT		 3543 temp_name[i] = readb(&(tb->ServerName[i]));
3544 temp_name[16] = '\0';
3545 printk(" Server Name = %s\n", temp_name);
7c832835 3546 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3547}
7c832835 3548#endif /* CCISS_DEBUG */
1da177e4 3549
7c832835 3550static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3551{
3552 int i, offset, mem_type, bar_type;
7c832835 3553 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3554 return 0;
3555 offset = 0;
7c832835
BH		 3556 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3557 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3558 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3559 offset += 4;
3560 else {
3561 mem_type = pci_resource_flags(pdev, i) &
7c832835 3562 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3563 switch (mem_type) {
7c832835
BH		 3564 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3565 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3566 offset += 4; /* 32 bit */
3567 break;
3568 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3569 offset += 8;
3570 break;
3571 default: /* reserved in PCI 2.2 */
3572 printk(KERN_WARNING
3573 "Base address is invalid\n");
3574 return -1;
1da177e4
LT		 3575 break;
3576 }
3577 }
7c832835
BH		 3578 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3579 return i + 1;
1da177e4
LT		 3580 }
3581 return -1;
3582}
3583
fb86a35b
MM		 3584/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3585 * controllers that are capable. If not, we use IO-APIC mode.
3586 */
3587
7c832835
BH		 3588static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3589 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3590{
3591#ifdef CONFIG_PCI_MSI
7c832835
BH		 3592 int err;
3593 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3594 {0, 2}, {0, 3}
3595 };
fb86a35b
MM		 3596
3597 /* Some boards advertise MSI but don't really support it */
3598 if ((board_id == 0x40700E11) ||
7c832835
BH		 3599 (board_id == 0x40800E11) ||
3600 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3601 goto default_int_mode;
3602
7c832835
BH		 3603 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3604 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3605 if (!err) {
3606 c->intr[0] = cciss_msix_entries[0].vector;
3607 c->intr[1] = cciss_msix_entries[1].vector;
3608 c->intr[2] = cciss_msix_entries[2].vector;
3609 c->intr[3] = cciss_msix_entries[3].vector;
3610 c->msix_vector = 1;
3611 return;
3612 }
3613 if (err > 0) {
3614 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3615 "available\n", err);
1ecb9c0f 3616 goto default_int_mode;
7c832835
BH		 3617 } else {
3618 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3619 err);
1ecb9c0f 3620 goto default_int_mode;
7c832835
BH		 3621 }
3622 }
3623 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3624 if (!pci_enable_msi(pdev)) {
7c832835 3625 c->msi_vector = 1;
7c832835
BH		 3626 } else {
3627 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3628 }
3629 }
1ecb9c0f 3630default_int_mode:
7c832835 3631#endif /* CONFIG_PCI_MSI */
fb86a35b 3632 /* if we get here we're going to use the default interrupt mode */
7c832835 3633 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3634 return;
3635}
3636
7d1fd970 3637static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3638{
3639 ushort subsystem_vendor_id, subsystem_device_id, command;
3640 __u32 board_id, scratchpad = 0;
3641 __u64 cfg_offset;
3642 __u32 cfg_base_addr;
3643 __u64 cfg_base_addr_index;
c33ac89b 3644 int i, err;
1da177e4
LT		 3645
3646 /* check to see if controller has been disabled */
3647 /* BEFORE trying to enable it */
7c832835
BH		 3648 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3649 if (!(command & 0x02)) {
3650 printk(KERN_WARNING
3651 "cciss: controller appears to be disabled\n");
c33ac89b 3652 return -ENODEV;
1da177e4
LT		 3653 }
3654
c33ac89b 3655 err = pci_enable_device(pdev);
7c832835 3656 if (err) {
1da177e4 3657 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3658 return err;
1da177e4 3659 }
1da177e4 3660
4e570309
BH		 3661 err = pci_request_regions(pdev, "cciss");
3662 if (err) {
3663 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3664 "aborting\n");
872225ca 3665 return err;
4e570309
BH		 3666 }
3667
1da177e4
LT		 3668 subsystem_vendor_id = pdev->subsystem_vendor;
3669 subsystem_device_id = pdev->subsystem_device;
3670 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3671 subsystem_vendor_id);
1da177e4 3672
1da177e4
LT		 3673#ifdef CCISS_DEBUG
3674 printk("command = %x\n", command);
3675 printk("irq = %x\n", pdev->irq);
3676 printk("board_id = %x\n", board_id);
7c832835 3677#endif /* CCISS_DEBUG */
1da177e4 3678
fb86a35b
MM		 3679/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3680 * else we use the IO-APIC interrupt assigned to us by system ROM.
3681 */
3682 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3683
e1438581
MM		 3684 /* find the memory BAR */
3685 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3686 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3687 break;
3688 }
3689 if (i == DEVICE_COUNT_RESOURCE) {
3690 printk(KERN_WARNING "cciss: No memory BAR found\n");
3691 err = -ENODEV;
3692 goto err_out_free_res;
3693 }
3694
3695 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3696 * already removed
3697 */
1da177e4 3698
1da177e4 3699#ifdef CCISS_DEBUG
9f92f471 3700 printk("address 0 = %lx\n", c->paddr);
7c832835 3701#endif /* CCISS_DEBUG */
a5b92873 3702 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3703
3704 /* Wait for the board to become ready. (PCI hotplug needs this.)
3705 * We poll for up to 120 secs, once per 100ms. */
7c832835 3706 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3707 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3708 if (scratchpad == CCISS_FIRMWARE_READY)
3709 break;
3710 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3711 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3712 }
3713 if (scratchpad != CCISS_FIRMWARE_READY) {
3714 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3715 err = -ENODEV;
4e570309 3716 goto err_out_free_res;
1da177e4
LT		 3717 }
3718
3719 /* get the address index number */
3720 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3721 cfg_base_addr &= (__u32) 0x0000ffff;
3722#ifdef CCISS_DEBUG
3723 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3724#endif /* CCISS_DEBUG */
3725 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3726#ifdef CCISS_DEBUG
9f92f471
RD		 3727 printk("cfg base address index = %llx\n",
3728 (unsigned long long)cfg_base_addr_index);
7c832835 3729#endif /* CCISS_DEBUG */
1da177e4
LT		 3730 if (cfg_base_addr_index == -1) {
3731 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3732 err = -ENODEV;
4e570309 3733 goto err_out_free_res;
1da177e4
LT		 3734 }
3735
3736 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3737#ifdef CCISS_DEBUG
9f92f471 3738 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3739#endif /* CCISS_DEBUG */
3740 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3741 cfg_base_addr_index) +
3742 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3743 c->board_id = board_id;
3744
3745#ifdef CCISS_DEBUG
945f390f 3746 print_cfg_table(c->cfgtable);
7c832835 3747#endif /* CCISS_DEBUG */
1da177e4 3748
49153998
MM		 3749 /* Some controllers support Zero Memory Raid (ZMR).
3750 * When configured in ZMR mode the number of supported
3751 * commands drops to 64. So instead of just setting an
3752 * arbitrary value we make the driver a little smarter.
3753 * We read the config table to tell us how many commands
3754 * are supported on the controller then subtract 4 to
3755 * leave a little room for ioctl calls.
3756 */
3757 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3758 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3759 if (board_id == products[i].board_id) {
3760 c->product_name = products[i].product_name;
3761 c->access = *(products[i].access);
49153998 3762 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3763 break;
3764 }
3765 }
7c832835
BH		 3766 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3767 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3768 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3769 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3770 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3771 err = -ENODEV;
4e570309 3772 goto err_out_free_res;
1da177e4 3773 }
4ff9a9a4
MM		 3774 /* We didn't find the controller in our list. We know the
3775 * signature is valid. If it's an HP device let's try to
3776 * bind to the device and fire it up. Otherwise we bail.
3777 */
3778 if (i == ARRAY_SIZE(products)) {
3779 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3780 c->product_name = products[i-1].product_name;
3781 c->access = *(products[i-1].access);
49153998 3782 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3783 printk(KERN_WARNING "cciss: This is an unknown "
3784 "Smart Array controller.\n"
3785 "cciss: Please update to the latest driver "
3786 "available from www.hp.com.\n");
3787 } else {
3788 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3789 " to access the Smart Array controller %08lx\n"
3790 , (unsigned long)board_id);
3791 err = -ENODEV;
3792 goto err_out_free_res;
3793 }
3794 }
1da177e4 3795#ifdef CONFIG_X86
7c832835
BH		 3796 {
3797 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3798 __u32 prefetch;
3799 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3800 prefetch |= 0x100;
3801 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3802 }
1da177e4
LT		 3803#endif
3804
8bf50f71
MMOD		 3805 /* Disabling DMA prefetch and refetch for the P600.
3806 * An ASIC bug may result in accesses to invalid memory addresses.
3807 * We've disabled prefetch for some time now. Testing with XEN
3808 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3809 */
3810 if(board_id == 0x3225103C) {
3811 __u32 dma_prefetch;
8bf50f71 3812 __u32 dma_refetch;
f92e2f5f
MM		 3813 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3814 dma_prefetch |= 0x8000;
3815 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3816 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3817 dma_refetch |= 0x1;
3818 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3819 }
3820
1da177e4
LT		 3821#ifdef CCISS_DEBUG
3822 printk("Trying to put board into Simple mode\n");
7c832835 3823#endif /* CCISS_DEBUG */
1da177e4 3824 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3825 /* Update the field, and then ring the doorbell */
3826 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3827 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3828
3829 /* under certain very rare conditions, this can take awhile.
3830 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3831 * as we enter this code.) */
7c832835 3832 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3833 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3834 break;
3835 /* delay and try again */
3836 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3837 schedule_timeout(msecs_to_jiffies(1));
7c832835 3838 }
1da177e4
LT		 3839
3840#ifdef CCISS_DEBUG
7c832835
BH		 3841 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3842 readl(c->vaddr + SA5_DOORBELL));
3843#endif /* CCISS_DEBUG */
1da177e4 3844#ifdef CCISS_DEBUG
7c832835
BH		 3845 print_cfg_table(c->cfgtable);
3846#endif /* CCISS_DEBUG */
1da177e4 3847
7c832835 3848 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3849 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3850 " simple mode\n");
c33ac89b 3851 err = -ENODEV;
4e570309 3852 goto err_out_free_res;
1da177e4
LT		 3853 }
3854 return 0;
3855
5faad620 3856err_out_free_res:
872225ca
MM		 3857 /*
3858 * Deliberately omit pci_disable_device(): it does something nasty to
3859 * Smart Array controllers that pci_enable_device does not undo
3860 */
4e570309 3861 pci_release_regions(pdev);
c33ac89b 3862 return err;
1da177e4
LT		 3863}
3864
6ae5ce8e
MM		 3865/* Function to find the first free pointer into our hba[] array
3866 * Returns -1 if no free entries are left.
7c832835 3867 */
1da177e4
LT		 3868static int alloc_cciss_hba(void)
3869{
799202cb 3870 int i;
1da177e4 3871
7c832835 3872 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3873 if (!hba[i]) {
3874 ctlr_info_t *p;
f2912a12 3875
06ff37ff 3876 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3877 if (!p)
3878 goto Enomem;
1da177e4
LT		 3879 hba[i] = p;
3880 return i;
3881 }
3882 }
3883 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3884 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3885 return -1;
3886Enomem:
1da177e4 3887 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3888 return -1;
3889}
3890
2c935593 3891static void free_hba(int n)
1da177e4 3892{
2c935593
SC		 3893 ctlr_info_t *h = hba[n];
3894 int i;
1da177e4 3895
2c935593
SC		 3896 hba[n] = NULL;
3897 for (i = 0; i < h->highest_lun + 1; i++)
3898 if (h->gendisk[i] != NULL)
3899 put_disk(h->gendisk[i]);
3900 kfree(h);
1da177e4
LT		 3901}
3902
82eb03cf
CC		 3903/* Send a message CDB to the firmware. */
3904static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3905{
3906 typedef struct {
3907 CommandListHeader_struct CommandHeader;
3908 RequestBlock_struct Request;
3909 ErrDescriptor_struct ErrorDescriptor;
3910 } Command;
3911 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3912 Command *cmd;
3913 dma_addr_t paddr64;
3914 uint32_t paddr32, tag;
3915 void __iomem *vaddr;
3916 int i, err;
3917
3918 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3919 if (vaddr == NULL)
3920 return -ENOMEM;
3921
3922 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3923 CCISS commands, so they must be allocated from the lower 4GiB of
3924 memory. */
e930438c 3925 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3926 if (err) {
3927 iounmap(vaddr);
3928 return -ENOMEM;
3929 }
3930
3931 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3932 if (cmd == NULL) {
3933 iounmap(vaddr);
3934 return -ENOMEM;
3935 }
3936
3937 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3938 although there's no guarantee, we assume that the address is at
3939 least 4-byte aligned (most likely, it's page-aligned). */
3940 paddr32 = paddr64;
3941
3942 cmd->CommandHeader.ReplyQueue = 0;
3943 cmd->CommandHeader.SGList = 0;
3944 cmd->CommandHeader.SGTotal = 0;
3945 cmd->CommandHeader.Tag.lower = paddr32;
3946 cmd->CommandHeader.Tag.upper = 0;
3947 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3948
3949 cmd->Request.CDBLen = 16;
3950 cmd->Request.Type.Type = TYPE_MSG;
3951 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3952 cmd->Request.Type.Direction = XFER_NONE;
3953 cmd->Request.Timeout = 0; /* Don't time out */
3954 cmd->Request.CDB[0] = opcode;
3955 cmd->Request.CDB[1] = type;
3956 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3957
3958 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3959 cmd->ErrorDescriptor.Addr.upper = 0;
3960 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3961
3962 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3963
3964 for (i = 0; i < 10; i++) {
3965 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3966 if ((tag & ~3) == paddr32)
3967 break;
3968 schedule_timeout_uninterruptible(HZ);
3969 }
3970
3971 iounmap(vaddr);
3972
3973 /* we leak the DMA buffer here ... no choice since the controller could
3974 still complete the command. */
3975 if (i == 10) {
3976 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3977 opcode, type);
3978 return -ETIMEDOUT;
3979 }
3980
3981 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3982
3983 if (tag & 2) {
3984 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3985 opcode, type);
3986 return -EIO;
3987 }
3988
3989 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
3990 opcode, type);
3991 return 0;
3992}
3993
3994#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
3995#define cciss_noop(p) cciss_message(p, 3, 0)
3996
3997static __devinit int cciss_reset_msi(struct pci_dev *pdev)
3998{
3999/* the #defines are stolen from drivers/pci/msi.h. */
4000#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4001#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4002
4003 int pos;
4004 u16 control = 0;
4005
4006 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4007 if (pos) {
4008 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4009 if (control & PCI_MSI_FLAGS_ENABLE) {
4010 printk(KERN_INFO "cciss: resetting MSI\n");
4011 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4012 }
4013 }
4014
4015 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4016 if (pos) {
4017 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4018 if (control & PCI_MSIX_FLAGS_ENABLE) {
4019 printk(KERN_INFO "cciss: resetting MSI-X\n");
4020 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4021 }
4022 }
4023
4024 return 0;
4025}
4026
4027/* This does a hard reset of the controller using PCI power management
4028 * states. */
4029static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4030{
4031 u16 pmcsr, saved_config_space[32];
4032 int i, pos;
4033
4034 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4035
4036 /* This is very nearly the same thing as
4037
4038 pci_save_state(pci_dev);
4039 pci_set_power_state(pci_dev, PCI_D3hot);
4040 pci_set_power_state(pci_dev, PCI_D0);
4041 pci_restore_state(pci_dev);
4042
4043 but we can't use these nice canned kernel routines on
4044 kexec, because they also check the MSI/MSI-X state in PCI
4045 configuration space and do the wrong thing when it is
4046 set/cleared. Also, the pci_save/restore_state functions
4047 violate the ordering requirements for restoring the
4048 configuration space from the CCISS document (see the
4049 comment below). So we roll our own .... */
4050
4051 for (i = 0; i < 32; i++)
4052 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4053
4054 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4055 if (pos == 0) {
4056 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4057 return -ENODEV;
4058 }
4059
4060 /* Quoting from the Open CISS Specification: "The Power
4061 * Management Control/Status Register (CSR) controls the power
4062 * state of the device. The normal operating state is D0,
4063 * CSR=00h. The software off state is D3, CSR=03h. To reset
4064 * the controller, place the interface device in D3 then to
4065 * D0, this causes a secondary PCI reset which will reset the
4066 * controller." */
4067
4068 /* enter the D3hot power management state */
4069 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4070 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4071 pmcsr |= PCI_D3hot;
4072 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4073
4074 schedule_timeout_uninterruptible(HZ >> 1);
4075
4076 /* enter the D0 power management state */
4077 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4078 pmcsr |= PCI_D0;
4079 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4080
4081 schedule_timeout_uninterruptible(HZ >> 1);
4082
4083 /* Restore the PCI configuration space. The Open CISS
4084 * Specification says, "Restore the PCI Configuration
4085 * Registers, offsets 00h through 60h. It is important to
4086 * restore the command register, 16-bits at offset 04h,
4087 * last. Do not restore the configuration status register,
4088 * 16-bits at offset 06h." Note that the offset is 2*i. */
4089 for (i = 0; i < 32; i++) {
4090 if (i == 2 || i == 3)
4091 continue;
4092 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4093 }
4094 wmb();
4095 pci_write_config_word(pdev, 4, saved_config_space[2]);
4096
4097 return 0;
4098}
4099
1da177e4
LT		 4100/*
4101 * This is it. Find all the controllers and register them. I really hate
4102 * stealing all these major device numbers.
4103 * returns the number of block devices registered.
4104 */
4105static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4106 const struct pci_device_id *ent)
1da177e4 4107{
1da177e4 4108 int i;
799202cb 4109 int j = 0;
1da177e4 4110 int rc;
22bece00 4111 int dac, return_code;
212a5026 4112 InquiryData_struct *inq_buff;
1da177e4 4113
82eb03cf
CC		 4114 if (reset_devices) {
4115 /* Reset the controller with a PCI power-cycle */
4116 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4117 return -ENODEV;
4118
5e18cfd0
JA		 4119 /* Now try to get the controller to respond to a no-op. Some
4120 devices (notably the HP Smart Array 5i Controller) need
4121 up to 30 seconds to respond. */
5e4c91c8 4122 for (i=0; i<30; i++) {
82eb03cf
CC		 4123 if (cciss_noop(pdev) == 0)
4124 break;
5e4c91c8
JA		 4125
4126 schedule_timeout_uninterruptible(HZ);
4127 }
4128 if (i == 30) {
4129 printk(KERN_ERR "cciss: controller seems dead\n");
4130 return -EBUSY;
82eb03cf
CC		 4131 }
4132 }
4133
1da177e4 4134 i = alloc_cciss_hba();
7c832835 4135 if (i < 0)
e2019b58 4136 return -1;
1f8ef380
MM		 4137
4138 hba[i]->busy_initializing = 1;
8a3173de
JA		 4139 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4140 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4141 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4142
1da177e4 4143 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 4144 goto clean0;
1da177e4
LT		 4145
4146 sprintf(hba[i]->devname, "cciss%d", i);
4147 hba[i]->ctlr = i;
4148 hba[i]->pdev = pdev;
4149
b368c9dd
AP		 4150 init_completion(&hba[i]->scan_wait);
4151
7fe06326
AP		 4152 if (cciss_create_hba_sysfs_entry(hba[i]))
4153 goto clean0;
4154
1da177e4 4155 /* configure PCI DMA stuff */
6a35528a 4156 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4157 dac = 1;
284901a9 4158 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4159 dac = 0;
1da177e4 4160 else {
40aabb58 4161 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4162 goto clean1;
4163 }
4164
4165 /*
4166 * register with the major number, or get a dynamic major number
4167 * by passing 0 as argument. This is done for greater than
4168 * 8 controller support.
4169 */
4170 if (i < MAX_CTLR_ORIG)
564de74a 4171 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4172 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4173 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4174 printk(KERN_ERR
7c832835
BH		 4175 "cciss: Unable to get major number %d for %s "
4176 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4177 goto clean1;
7c832835 4178 } else {
1da177e4
LT		 4179 if (i >= MAX_CTLR_ORIG)
4180 hba[i]->major = rc;
4181 }
4182
4183 /* make sure the board interrupts are off */
4184 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4185 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4186 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4187 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4188 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4189 goto clean2;
4190 }
40aabb58
BH		 4191
4192 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4193 hba[i]->devname, pdev->device, pci_name(pdev),
4194 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4195
4196 hba[i]->cmd_pool_bits =
061837bc
JL		 4197 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4198 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4199 hba[i]->cmd_pool = (CommandList_struct *)
4200 pci_alloc_consistent(hba[i]->pdev,
f880632f 4201 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4202 &(hba[i]->cmd_pool_dhandle));
4203 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4204 pci_alloc_consistent(hba[i]->pdev,
f880632f 4205 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4206 &(hba[i]->errinfo_pool_dhandle));
4207 if ((hba[i]->cmd_pool_bits == NULL)
4208 || (hba[i]->cmd_pool == NULL)
4209 || (hba[i]->errinfo_pool == NULL)) {
4210 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4211 goto clean4;
4212 }
1da177e4 4213 spin_lock_init(&hba[i]->lock);
1da177e4 4214
7c832835
BH		 4215 /* Initialize the pdev driver private data.
4216 have it point to hba[i]. */
1da177e4 4217 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4218 /* command and error info recs zeroed out before
4219 they are used */
4220 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4221 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4222 * sizeof(unsigned long));
1da177e4 4223
6ae5ce8e
MM		 4224 hba[i]->num_luns = 0;
4225 hba[i]->highest_lun = -1;
4226 for (j = 0; j < CISS_MAX_LUN; j++) {
4227 hba[i]->drv[j].raid_level = -1;
4228 hba[i]->drv[j].queue = NULL;
4229 hba[i]->gendisk[j] = NULL;
4230 }
1da177e4
LT		 4231
4232 cciss_scsi_setup(i);
4233
4234 /* Turn the interrupts on so we can service requests */
4235 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4236
22bece00
MM		 4237 /* Get the firmware version */
4238 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4239 if (inq_buff == NULL) {
4240 printk(KERN_ERR "cciss: out of memory\n");
4241 goto clean4;
4242 }
4243
4244 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4245 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4246 if (return_code == IO_OK) {
4247 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4248 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4249 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4250 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4251 } else { /* send command failed */
4252 printk(KERN_WARNING "cciss: unable to determine firmware"
4253 " version of controller\n");
4254 }
212a5026 4255 kfree(inq_buff);
22bece00 4256
1da177e4 4257 cciss_procinit(i);
92c4231a
MM		 4258
4259 hba[i]->cciss_max_sectors = 2048;
4260
2d11d993 4261 rebuild_lun_table(hba[i], 1, 0);
b368c9dd 4262 hba[i]->busy_initializing = 0;
e2019b58 4263 return 1;
1da177e4 4264
6ae5ce8e 4265clean4:
6044ec88 4266 kfree(hba[i]->cmd_pool_bits);
7c832835 4267 if (hba[i]->cmd_pool)
1da177e4 4268 pci_free_consistent(hba[i]->pdev,
f880632f 4269 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4270 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4271 if (hba[i]->errinfo_pool)
1da177e4 4272 pci_free_consistent(hba[i]->pdev,
f880632f 4273 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4274 hba[i]->errinfo_pool,
4275 hba[i]->errinfo_pool_dhandle);
fb86a35b 4276 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4277clean2:
1da177e4 4278 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4279clean1:
7fe06326
AP		 4280 cciss_destroy_hba_sysfs_entry(hba[i]);
4281clean0:
1f8ef380 4282 hba[i]->busy_initializing = 0;
799202cb
MM		 4283 /* cleanup any queues that may have been initialized */
4284 for (j=0; j <= hba[i]->highest_lun; j++){
4285 drive_info_struct *drv = &(hba[i]->drv[j]);
4286 if (drv->queue)
4287 blk_cleanup_queue(drv->queue);
4288 }
872225ca
MM		 4289 /*
4290 * Deliberately omit pci_disable_device(): it does something nasty to
4291 * Smart Array controllers that pci_enable_device does not undo
4292 */
799202cb 4293 pci_release_regions(pdev);
799202cb 4294 pci_set_drvdata(pdev, NULL);
61808c2b 4295 free_hba(i);
e2019b58 4296 return -1;
1da177e4
LT		 4297}
4298
e9ca75b5 4299static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4300{
4301 ctlr_info_t *tmp_ptr;
e9ca75b5 4302 int i;
1da177e4 4303 char flush_buf[4];
7c832835 4304 int return_code;
1da177e4 4305
e9ca75b5
GB		 4306 tmp_ptr = pci_get_drvdata(pdev);
4307 if (tmp_ptr == NULL)
4308 return;
4309 i = tmp_ptr->ctlr;
4310 if (hba[i] == NULL)
4311 return;
4312
4313 /* Turn board interrupts off and send the flush cache command */
4314 /* sendcmd will turn off interrupt, and send the flush...
4315 * To write all data in the battery backed cache to disks */
4316 memset(flush_buf, 0, 4);
b57695fe 4317 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4318 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4319 if (return_code == IO_OK) {
4320 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4321 } else {
4322 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4323 }
4324 free_irq(hba[i]->intr[2], hba[i]);
4325}
4326
4327static void __devexit cciss_remove_one(struct pci_dev *pdev)
4328{
4329 ctlr_info_t *tmp_ptr;
4330 int i, j;
4331
7c832835
BH		 4332 if (pci_get_drvdata(pdev) == NULL) {
4333 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4334 return;
4335 }
0a9279cc 4336
1da177e4
LT		 4337 tmp_ptr = pci_get_drvdata(pdev);
4338 i = tmp_ptr->ctlr;
7c832835 4339 if (hba[i] == NULL) {
1da177e4 4340 printk(KERN_ERR "cciss: device appears to "
7c832835 4341 "already be removed \n");
1da177e4
LT		 4342 return;
4343 }
b6550777 4344
b368c9dd 4345 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4346
b368c9dd 4347 remove_from_scan_list(hba[i]);
b6550777
BH		 4348 remove_proc_entry(hba[i]->devname, proc_cciss);
4349 unregister_blkdev(hba[i]->major, hba[i]->devname);
4350
4351 /* remove it from the disk list */
4352 for (j = 0; j < CISS_MAX_LUN; j++) {
4353 struct gendisk *disk = hba[i]->gendisk[j];
4354 if (disk) {
165125e1 4355 struct request_queue *q = disk->queue;
b6550777 4356
097d0264 4357 if (disk->flags & GENHD_FL_UP) {
8ce51966 4358 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4359 del_gendisk(disk);
097d0264 4360 }
b6550777
BH		 4361 if (q)
4362 blk_cleanup_queue(q);
4363 }
4364 }
4365
ba198efb 4366#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4367 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4368#endif
b6550777 4369
e9ca75b5 4370 cciss_shutdown(pdev);
fb86a35b
MM		 4371
4372#ifdef CONFIG_PCI_MSI
7c832835
BH		 4373 if (hba[i]->msix_vector)
4374 pci_disable_msix(hba[i]->pdev);
4375 else if (hba[i]->msi_vector)
4376 pci_disable_msi(hba[i]->pdev);
4377#endif /* CONFIG_PCI_MSI */
fb86a35b 4378
1da177e4 4379 iounmap(hba[i]->vaddr);
1da177e4 4380
f880632f 4381 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4382 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4383 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4384 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4385 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4386 /*
4387 * Deliberately omit pci_disable_device(): it does something nasty to
4388 * Smart Array controllers that pci_enable_device does not undo
4389 */
7c832835 4390 pci_release_regions(pdev);
4e570309 4391 pci_set_drvdata(pdev, NULL);
7fe06326 4392 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4393 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4394 free_hba(i);
7c832835 4395}
1da177e4
LT		 4396
4397static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4398 .name = "cciss",
4399 .probe = cciss_init_one,
4400 .remove = __devexit_p(cciss_remove_one),
4401 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4402 .shutdown = cciss_shutdown,
1da177e4
LT		 4403};
4404
4405/*
4406 * This is it. Register the PCI driver information for the cards we control
7c832835 4407 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4408 */
4409static int __init cciss_init(void)
4410{
7fe06326
AP		 4411 int err;
4412
10cbda97
JA		 4413 /*
4414 * The hardware requires that commands are aligned on a 64-bit
4415 * boundary. Given that we use pci_alloc_consistent() to allocate an
4416 * array of them, the size must be a multiple of 8 bytes.
4417 */
4418 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4419
1da177e4
LT		 4420 printk(KERN_INFO DRIVER_NAME "\n");
4421
7fe06326
AP		 4422 err = bus_register(&cciss_bus_type);
4423 if (err)
4424 return err;
4425
b368c9dd
AP		 4426 /* Start the scan thread */
4427 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4428 if (IS_ERR(cciss_scan_thread)) {
4429 err = PTR_ERR(cciss_scan_thread);
4430 goto err_bus_unregister;
4431 }
4432
1da177e4 4433 /* Register for our PCI devices */
7fe06326
AP		 4434 err = pci_register_driver(&cciss_pci_driver);
4435 if (err)
b368c9dd 4436 goto err_thread_stop;
7fe06326 4437
617e1344 4438 return err;
7fe06326 4439
b368c9dd
AP		 4440err_thread_stop:
4441 kthread_stop(cciss_scan_thread);
4442err_bus_unregister:
7fe06326 4443 bus_unregister(&cciss_bus_type);
b368c9dd 4444
7fe06326 4445 return err;
1da177e4
LT		 4446}
4447
4448static void __exit cciss_cleanup(void)
4449{
4450 int i;
4451
4452 pci_unregister_driver(&cciss_pci_driver);
4453 /* double check that all controller entrys have been removed */
7c832835
BH		 4454 for (i = 0; i < MAX_CTLR; i++) {
4455 if (hba[i] != NULL) {
1da177e4 4456 printk(KERN_WARNING "cciss: had to remove"
7c832835 4457 " controller %d\n", i);
1da177e4
LT		 4458 cciss_remove_one(hba[i]->pdev);
4459 }
4460 }
b368c9dd 4461 kthread_stop(cciss_scan_thread);
928b4d8c 4462 remove_proc_entry("driver/cciss", NULL);
7fe06326 4463 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4464}
4465
33079b21
MM		 4466static void fail_all_cmds(unsigned long ctlr)
4467{
4468 /* If we get here, the board is apparently dead. */
4469 ctlr_info_t *h = hba[ctlr];
4470 CommandList_struct *c;
4471 unsigned long flags;
4472
4473 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4474 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4475
4476 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4477
7c832835 4478 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4479
4480 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4481 while (!hlist_empty(&h->reqQ)) {
4482 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4483 removeQ(c);
33079b21 4484 h->Qdepth--;
8a3173de 4485 addQ(&h->cmpQ, c);
33079b21
MM		 4486 }
4487
4488 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4489 while (!hlist_empty(&h->cmpQ)) {
4490 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4491 removeQ(c);
b59e64d0
HR		 4492 if (c->cmd_type != CMD_MSG_STALE)
4493 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4494 if (c->cmd_type == CMD_RWREQ) {
4495 complete_command(h, c, 0);
4496 } else if (c->cmd_type == CMD_IOCTL_PEND)
4497 complete(c->waiting);
4498#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4499 else if (c->cmd_type == CMD_SCSI)
4500 complete_scsi_command(c, 0, 0);
33079b21
MM		 4501#endif
4502 }
4503 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4504 return;
4505}
4506
1da177e4
LT		 4507module_init(cciss_init);
4508module_exit(cciss_cleanup);
Linux kernel - Deliverables
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