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cciss: fix some magic numbers in the raid-level decoding
[net-next-2.6.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
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
258#ifdef CONFIG_PROC_FS
259
260/*
261 * Report information about this controller.
262 */
263#define ENG_GIG 1000000000
264#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 265#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 266static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
267 "UNKNOWN"
268};
fa52bec9 269#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
1da177e4
LT		 270
271static struct proc_dir_entry *proc_cciss;
272
89b6e743 273static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 274{
89b6e743
MM		 275 ctlr_info_t *h = seq->private;
276
277 seq_printf(seq, "%s: HP %s Controller\n"
278 "Board ID: 0x%08lx\n"
279 "Firmware Version: %c%c%c%c\n"
280 "IRQ: %d\n"
281 "Logical drives: %d\n"
282 "Current Q depth: %d\n"
283 "Current # commands on controller: %d\n"
284 "Max Q depth since init: %d\n"
285 "Max # commands on controller since init: %d\n"
286 "Max SG entries since init: %d\n",
287 h->devname,
288 h->product_name,
289 (unsigned long)h->board_id,
290 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
291 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
292 h->num_luns,
293 h->Qdepth, h->commands_outstanding,
294 h->maxQsinceinit, h->max_outstanding, h->maxSG);
295
296#ifdef CONFIG_CISS_SCSI_TAPE
297 cciss_seq_tape_report(seq, h->ctlr);
298#endif /* CONFIG_CISS_SCSI_TAPE */
299}
1da177e4 300
89b6e743
MM		 301static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
302{
303 ctlr_info_t *h = seq->private;
304 unsigned ctlr = h->ctlr;
305 unsigned long flags;
1da177e4
LT		 306
307 /* prevent displaying bogus info during configuration
308 * or deconfiguration of a logical volume
309 */
310 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
311 if (h->busy_configuring) {
312 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 313 return ERR_PTR(-EBUSY);
1da177e4
LT		 314 }
315 h->busy_configuring = 1;
316 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
317
89b6e743
MM		 318 if (*pos == 0)
319 cciss_seq_show_header(seq);
320
321 return pos;
322}
323
324static int cciss_seq_show(struct seq_file *seq, void *v)
325{
326 sector_t vol_sz, vol_sz_frac;
327 ctlr_info_t *h = seq->private;
328 unsigned ctlr = h->ctlr;
329 loff_t *pos = v;
330 drive_info_struct *drv = &h->drv[*pos];
331
332 if (*pos > h->highest_lun)
333 return 0;
334
335 if (drv->heads == 0)
336 return 0;
337
338 vol_sz = drv->nr_blocks;
339 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
340 vol_sz_frac *= 100;
341 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
342
fa52bec9 343 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 344 drv->raid_level = RAID_UNKNOWN;
345 seq_printf(seq, "cciss/c%dd%d:"
346 "\t%4u.%02uGB\tRAID %s\n",
347 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
348 raid_label[drv->raid_level]);
349 return 0;
350}
351
352static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
353{
354 ctlr_info_t *h = seq->private;
355
356 if (*pos > h->highest_lun)
357 return NULL;
358 *pos += 1;
359
360 return pos;
361}
362
363static void cciss_seq_stop(struct seq_file *seq, void *v)
364{
365 ctlr_info_t *h = seq->private;
366
367 /* Only reset h->busy_configuring if we succeeded in setting
368 * it during cciss_seq_start. */
369 if (v == ERR_PTR(-EBUSY))
370 return;
7c832835 371
1da177e4 372 h->busy_configuring = 0;
1da177e4
LT		 373}
374
88e9d34c 375static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 376 .start = cciss_seq_start,
377 .show = cciss_seq_show,
378 .next = cciss_seq_next,
379 .stop = cciss_seq_stop,
380};
381
382static int cciss_seq_open(struct inode *inode, struct file *file)
383{
384 int ret = seq_open(file, &cciss_seq_ops);
385 struct seq_file *seq = file->private_data;
386
387 if (!ret)
388 seq->private = PDE(inode)->data;
389
390 return ret;
391}
392
393static ssize_t
394cciss_proc_write(struct file *file, const char __user *buf,
395 size_t length, loff_t *ppos)
1da177e4 396{
89b6e743
MM		 397 int err;
398 char *buffer;
399
400#ifndef CONFIG_CISS_SCSI_TAPE
401 return -EINVAL;
1da177e4
LT		 402#endif
403
89b6e743 404 if (!buf || length > PAGE_SIZE - 1)
7c832835 405 return -EINVAL;
89b6e743
MM		 406
407 buffer = (char *)__get_free_page(GFP_KERNEL);
408 if (!buffer)
409 return -ENOMEM;
410
411 err = -EFAULT;
412 if (copy_from_user(buffer, buf, length))
413 goto out;
414 buffer[length] = '\0';
415
416#ifdef CONFIG_CISS_SCSI_TAPE
417 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
418 struct seq_file *seq = file->private_data;
419 ctlr_info_t *h = seq->private;
420 int rc;
421
7c832835
BH		 422 rc = cciss_engage_scsi(h->ctlr);
423 if (rc != 0)
89b6e743
MM		 424 err = -rc;
425 else
426 err = length;
427 } else
428#endif /* CONFIG_CISS_SCSI_TAPE */
429 err = -EINVAL;
7c832835
BH		 430 /* might be nice to have "disengage" too, but it's not
431 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 432
433out:
434 free_page((unsigned long)buffer);
435 return err;
1da177e4
LT		 436}
437
89b6e743
MM		 438static struct file_operations cciss_proc_fops = {
439 .owner = THIS_MODULE,
440 .open = cciss_seq_open,
441 .read = seq_read,
442 .llseek = seq_lseek,
443 .release = seq_release,
444 .write = cciss_proc_write,
445};
446
1da177e4
LT		 447static void __devinit cciss_procinit(int i)
448{
449 struct proc_dir_entry *pde;
450
89b6e743 451 if (proc_cciss == NULL)
928b4d8c 452 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 453 if (!proc_cciss)
454 return;
3dfcf9c4 455 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 456 S_IROTH, proc_cciss,
3dfcf9c4 457 &cciss_proc_fops, hba[i]);
1da177e4 458}
7c832835 459#endif /* CONFIG_PROC_FS */
1da177e4 460
7fe06326
AP		 461#define MAX_PRODUCT_NAME_LEN 19
462
463#define to_hba(n) container_of(n, struct ctlr_info, dev)
7fe06326 464
d6f4965d
AP		 465static ssize_t host_store_rescan(struct device *dev,
466 struct device_attribute *attr,
467 const char *buf, size_t count)
468{
469 struct ctlr_info *h = to_hba(dev);
470
471 add_to_scan_list(h);
472 wake_up_process(cciss_scan_thread);
473 wait_for_completion_interruptible(&h->scan_wait);
474
475 return count;
476}
477DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 478
479static ssize_t dev_show_unique_id(struct device *dev,
480 struct device_attribute *attr,
481 char *buf)
482{
617e1344
SC		 483 drive_info_struct *drv = dev_get_drvdata(dev);
484 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 485 __u8 sn[16];
486 unsigned long flags;
487 int ret = 0;
488
489 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
490 if (h->busy_configuring)
491 ret = -EBUSY;
492 else
493 memcpy(sn, drv->serial_no, sizeof(sn));
494 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
495
496 if (ret)
497 return ret;
498 else
499 return snprintf(buf, 16 * 2 + 2,
500 "%02X%02X%02X%02X%02X%02X%02X%02X"
501 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
502 sn[0], sn[1], sn[2], sn[3],
503 sn[4], sn[5], sn[6], sn[7],
504 sn[8], sn[9], sn[10], sn[11],
505 sn[12], sn[13], sn[14], sn[15]);
506}
507DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
508
509static ssize_t dev_show_vendor(struct device *dev,
510 struct device_attribute *attr,
511 char *buf)
512{
617e1344
SC		 513 drive_info_struct *drv = dev_get_drvdata(dev);
514 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 515 char vendor[VENDOR_LEN + 1];
516 unsigned long flags;
517 int ret = 0;
518
519 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
520 if (h->busy_configuring)
521 ret = -EBUSY;
522 else
523 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
524 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
525
526 if (ret)
527 return ret;
528 else
529 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
530}
531DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
532
533static ssize_t dev_show_model(struct device *dev,
534 struct device_attribute *attr,
535 char *buf)
536{
617e1344
SC		 537 drive_info_struct *drv = dev_get_drvdata(dev);
538 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 539 char model[MODEL_LEN + 1];
540 unsigned long flags;
541 int ret = 0;
542
543 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
544 if (h->busy_configuring)
545 ret = -EBUSY;
546 else
547 memcpy(model, drv->model, MODEL_LEN + 1);
548 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
549
550 if (ret)
551 return ret;
552 else
553 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
554}
555DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
556
557static ssize_t dev_show_rev(struct device *dev,
558 struct device_attribute *attr,
559 char *buf)
560{
617e1344
SC		 561 drive_info_struct *drv = dev_get_drvdata(dev);
562 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 563 char rev[REV_LEN + 1];
564 unsigned long flags;
565 int ret = 0;
566
567 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
568 if (h->busy_configuring)
569 ret = -EBUSY;
570 else
571 memcpy(rev, drv->rev, REV_LEN + 1);
572 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
573
574 if (ret)
575 return ret;
576 else
577 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
578}
579DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
580
ce84a8ae
SC		 581static ssize_t cciss_show_lunid(struct device *dev,
582 struct device_attribute *attr, char *buf)
583{
584 drive_info_struct *drv = dev_get_drvdata(dev);
585 struct ctlr_info *h = to_hba(drv->dev->parent);
586 unsigned long flags;
587 unsigned char lunid[8];
588
589 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
590 if (h->busy_configuring) {
591 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
592 return -EBUSY;
593 }
594 if (!drv->heads) {
595 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
596 return -ENOTTY;
597 }
598 memcpy(lunid, drv->LunID, sizeof(lunid));
599 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
600 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
601 lunid[0], lunid[1], lunid[2], lunid[3],
602 lunid[4], lunid[5], lunid[6], lunid[7]);
603}
604DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
605
d6f4965d
AP		 606static struct attribute *cciss_host_attrs[] = {
607 &dev_attr_rescan.attr,
608 NULL
609};
610
611static struct attribute_group cciss_host_attr_group = {
612 .attrs = cciss_host_attrs,
613};
614
615static struct attribute_group *cciss_host_attr_groups[] = {
616 &cciss_host_attr_group,
617 NULL
618};
619
620static struct device_type cciss_host_type = {
621 .name = "cciss_host",
622 .groups = cciss_host_attr_groups,
617e1344 623 .release = cciss_hba_release,
d6f4965d
AP		 624};
625
7fe06326
AP		 626static struct attribute *cciss_dev_attrs[] = {
627 &dev_attr_unique_id.attr,
628 &dev_attr_model.attr,
629 &dev_attr_vendor.attr,
630 &dev_attr_rev.attr,
ce84a8ae 631 &dev_attr_lunid.attr,
7fe06326
AP		 632 NULL
633};
634
635static struct attribute_group cciss_dev_attr_group = {
636 .attrs = cciss_dev_attrs,
637};
638
a4dbd674 639static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 640 &cciss_dev_attr_group,
641 NULL
642};
643
644static struct device_type cciss_dev_type = {
645 .name = "cciss_device",
646 .groups = cciss_dev_attr_groups,
617e1344 647 .release = cciss_device_release,
7fe06326
AP		 648};
649
650static struct bus_type cciss_bus_type = {
651 .name = "cciss",
652};
653
617e1344
SC		 654/*
655 * cciss_hba_release is called when the reference count
656 * of h->dev goes to zero.
657 */
658static void cciss_hba_release(struct device *dev)
659{
660 /*
661 * nothing to do, but need this to avoid a warning
662 * about not having a release handler from lib/kref.c.
663 */
664}
7fe06326
AP		 665
666/*
667 * Initialize sysfs entry for each controller. This sets up and registers
668 * the 'cciss#' directory for each individual controller under
669 * /sys/bus/pci/devices/<dev>/.
670 */
671static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
672{
673 device_initialize(&h->dev);
674 h->dev.type = &cciss_host_type;
675 h->dev.bus = &cciss_bus_type;
676 dev_set_name(&h->dev, "%s", h->devname);
677 h->dev.parent = &h->pdev->dev;
678
679 return device_add(&h->dev);
680}
681
682/*
683 * Remove sysfs entries for an hba.
684 */
685static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
686{
687 device_del(&h->dev);
617e1344
SC		 688 put_device(&h->dev); /* final put. */
689}
690
691/* cciss_device_release is called when the reference count
692 * of h->drv[x].dev goes to zero.
693 */
694static void cciss_device_release(struct device *dev)
695{
696 kfree(dev);
7fe06326
AP		 697}
698
699/*
700 * Initialize sysfs for each logical drive. This sets up and registers
701 * the 'c#d#' directory for each individual logical drive under
702 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
703 * /sys/block/cciss!c#d# to this entry.
704 */
617e1344 705static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 706 int drv_index)
707{
617e1344
SC		 708 struct device *dev;
709
8ce51966
SC		 710 /* Special case for c*d0, we only create it once. */
711 if (drv_index == 0 && h->drv[drv_index].dev != NULL)
712 return 0;
713
617e1344
SC		 714 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
715 if (!dev)
716 return -ENOMEM;
717 device_initialize(dev);
718 dev->type = &cciss_dev_type;
719 dev->bus = &cciss_bus_type;
720 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
721 dev->parent = &h->dev;
722 h->drv[drv_index].dev = dev;
723 dev_set_drvdata(dev, &h->drv[drv_index]);
724 return device_add(dev);
7fe06326
AP		 725}
726
727/*
728 * Remove sysfs entries for a logical drive.
729 */
8ce51966
SC		 730static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
731 int ctlr_exiting)
7fe06326 732{
617e1344 733 struct device *dev = h->drv[drv_index].dev;
8ce51966
SC		 734
735 /* special case for c*d0, we only destroy it on controller exit */
736 if (drv_index == 0 && !ctlr_exiting)
737 return;
738
617e1344
SC		 739 device_del(dev);
740 put_device(dev); /* the "final" put. */
741 h->drv[drv_index].dev = NULL;
7fe06326
AP		 742}
743
7c832835
BH		 744/*
745 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 746 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 747 * which ones are free or in use. For operations that can wait for kmalloc
748 * to possible sleep, this routine can be called with get_from_pool set to 0.
749 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
750 */
751static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 752{
753 CommandList_struct *c;
7c832835 754 int i;
1da177e4
LT		 755 u64bit temp64;
756 dma_addr_t cmd_dma_handle, err_dma_handle;
757
7c832835
BH		 758 if (!get_from_pool) {
759 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
760 sizeof(CommandList_struct), &cmd_dma_handle);
761 if (c == NULL)
762 return NULL;
1da177e4
LT		 763 memset(c, 0, sizeof(CommandList_struct));
764
33079b21
MM		 765 c->cmdindex = -1;
766
7c832835
BH		 767 c->err_info = (ErrorInfo_struct *)
768 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
769 &err_dma_handle);
770
771 if (c->err_info == NULL) {
772 pci_free_consistent(h->pdev,
1da177e4
LT		 773 sizeof(CommandList_struct), c, cmd_dma_handle);
774 return NULL;
775 }
776 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 777 } else { /* get it out of the controllers pool */
778
779 do {
f880632f
MM		 780 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
781 if (i == h->nr_cmds)
7c832835
BH		 782 return NULL;
783 } while (test_and_set_bit
784 (i & (BITS_PER_LONG - 1),
785 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 786#ifdef CCISS_DEBUG
787 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
788#endif
7c832835 789 c = h->cmd_pool + i;
1da177e4 790 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 791 cmd_dma_handle = h->cmd_pool_dhandle
792 + i * sizeof(CommandList_struct);
1da177e4
LT		 793 c->err_info = h->errinfo_pool + i;
794 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 795 err_dma_handle = h->errinfo_pool_dhandle
796 + i * sizeof(ErrorInfo_struct);
797 h->nr_allocs++;
33079b21
MM		 798
799 c->cmdindex = i;
7c832835 800 }
1da177e4 801
8a3173de 802 INIT_HLIST_NODE(&c->list);
1da177e4 803 c->busaddr = (__u32) cmd_dma_handle;
7c832835 804 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 805 c->ErrDesc.Addr.lower = temp64.val32.lower;
806 c->ErrDesc.Addr.upper = temp64.val32.upper;
807 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 808
7c832835
BH		 809 c->ctlr = h->ctlr;
810 return c;
1da177e4
LT		 811}
812
7c832835
BH		 813/*
814 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 815 */
816static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
817{
818 int i;
819 u64bit temp64;
820
7c832835 821 if (!got_from_pool) {
1da177e4
LT		 822 temp64.val32.lower = c->ErrDesc.Addr.lower;
823 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 824 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
825 c->err_info, (dma_addr_t) temp64.val);
826 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
827 c, (dma_addr_t) c->busaddr);
828 } else {
1da177e4 829 i = c - h->cmd_pool;
7c832835
BH		 830 clear_bit(i & (BITS_PER_LONG - 1),
831 h->cmd_pool_bits + (i / BITS_PER_LONG));
832 h->nr_frees++;
833 }
1da177e4
LT		 834}
835
836static inline ctlr_info_t *get_host(struct gendisk *disk)
837{
7c832835 838 return disk->queue->queuedata;
1da177e4
LT		 839}
840
841static inline drive_info_struct *get_drv(struct gendisk *disk)
842{
843 return disk->private_data;
844}
845
846/*
847 * Open. Make sure the device is really there.
848 */
ef7822c2 849static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 850{
ef7822c2
AV		 851 ctlr_info_t *host = get_host(bdev->bd_disk);
852 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 853
854#ifdef CCISS_DEBUG
ef7822c2 855 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 856#endif /* CCISS_DEBUG */
1da177e4 857
2e043986 858 if (drv->busy_configuring)
ddd47442 859 return -EBUSY;
1da177e4
LT		 860 /*
861 * Root is allowed to open raw volume zero even if it's not configured
862 * so array config can still work. Root is also allowed to open any
863 * volume that has a LUN ID, so it can issue IOCTL to reread the
864 * disk information. I don't think I really like this
865 * but I'm already using way to many device nodes to claim another one
866 * for "raw controller".
867 */
7a06f789 868 if (drv->heads == 0) {
ef7822c2 869 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 870 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 871 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 872 return -ENXIO;
1da177e4 873 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 874 } else if (memcmp(drv->LunID, CTLR_LUNID,
875 sizeof(drv->LunID))) {
1da177e4
LT		 876 return -ENXIO;
877 }
878 }
879 if (!capable(CAP_SYS_ADMIN))
880 return -EPERM;
881 }
882 drv->usage_count++;
883 host->usage_count++;
884 return 0;
885}
7c832835 886
1da177e4
LT		 887/*
888 * Close. Sync first.
889 */
ef7822c2 890static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 891{
ef7822c2
AV		 892 ctlr_info_t *host = get_host(disk);
893 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 894
895#ifdef CCISS_DEBUG
ef7822c2 896 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 897#endif /* CCISS_DEBUG */
1da177e4
LT		 898
899 drv->usage_count--;
900 host->usage_count--;
901 return 0;
902}
903
904#ifdef CONFIG_COMPAT
905
ef7822c2
AV		 906static int do_ioctl(struct block_device *bdev, fmode_t mode,
907 unsigned cmd, unsigned long arg)
1da177e4
LT		 908{
909 int ret;
910 lock_kernel();
ef7822c2 911 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 912 unlock_kernel();
913 return ret;
914}
915
ef7822c2
AV		 916static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
917 unsigned cmd, unsigned long arg);
918static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
919 unsigned cmd, unsigned long arg);
1da177e4 920
ef7822c2
AV		 921static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
922 unsigned cmd, unsigned long arg)
1da177e4
LT		 923{
924 switch (cmd) {
925 case CCISS_GETPCIINFO:
926 case CCISS_GETINTINFO:
927 case CCISS_SETINTINFO:
928 case CCISS_GETNODENAME:
929 case CCISS_SETNODENAME:
930 case CCISS_GETHEARTBEAT:
931 case CCISS_GETBUSTYPES:
932 case CCISS_GETFIRMVER:
933 case CCISS_GETDRIVVER:
934 case CCISS_REVALIDVOLS:
935 case CCISS_DEREGDISK:
936 case CCISS_REGNEWDISK:
937 case CCISS_REGNEWD:
938 case CCISS_RESCANDISK:
939 case CCISS_GETLUNINFO:
ef7822c2 940 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 941
942 case CCISS_PASSTHRU32:
ef7822c2 943 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 944 case CCISS_BIG_PASSTHRU32:
ef7822c2 945 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 946
947 default:
948 return -ENOIOCTLCMD;
949 }
950}
951
ef7822c2
AV		 952static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
953 unsigned cmd, unsigned long arg)
1da177e4
LT		 954{
955 IOCTL32_Command_struct __user *arg32 =
7c832835 956 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 957 IOCTL_Command_struct arg64;
958 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
959 int err;
960 u32 cp;
961
962 err = 0;
7c832835
BH		 963 err |=
964 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
965 sizeof(arg64.LUN_info));
966 err |=
967 copy_from_user(&arg64.Request, &arg32->Request,
968 sizeof(arg64.Request));
969 err |=
970 copy_from_user(&arg64.error_info, &arg32->error_info,
971 sizeof(arg64.error_info));
1da177e4
LT		 972 err |= get_user(arg64.buf_size, &arg32->buf_size);
973 err |= get_user(cp, &arg32->buf);
974 arg64.buf = compat_ptr(cp);
975 err |= copy_to_user(p, &arg64, sizeof(arg64));
976
977 if (err)
978 return -EFAULT;
979
ef7822c2 980 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 981 if (err)
982 return err;
7c832835
BH		 983 err |=
984 copy_in_user(&arg32->error_info, &p->error_info,
985 sizeof(arg32->error_info));
1da177e4
LT		 986 if (err)
987 return -EFAULT;
988 return err;
989}
990
ef7822c2
AV		 991static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
992 unsigned cmd, unsigned long arg)
1da177e4
LT		 993{
994 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 995 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 996 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 997 BIG_IOCTL_Command_struct __user *p =
998 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 999 int err;
1000 u32 cp;
1001
1002 err = 0;
7c832835
BH		 1003 err |=
1004 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1005 sizeof(arg64.LUN_info));
1006 err |=
1007 copy_from_user(&arg64.Request, &arg32->Request,
1008 sizeof(arg64.Request));
1009 err |=
1010 copy_from_user(&arg64.error_info, &arg32->error_info,
1011 sizeof(arg64.error_info));
1da177e4
LT		 1012 err |= get_user(arg64.buf_size, &arg32->buf_size);
1013 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1014 err |= get_user(cp, &arg32->buf);
1015 arg64.buf = compat_ptr(cp);
1016 err |= copy_to_user(p, &arg64, sizeof(arg64));
1017
1018 if (err)
7c832835 1019 return -EFAULT;
1da177e4 1020
ef7822c2 1021 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1022 if (err)
1023 return err;
7c832835
BH		 1024 err |=
1025 copy_in_user(&arg32->error_info, &p->error_info,
1026 sizeof(arg32->error_info));
1da177e4
LT		 1027 if (err)
1028 return -EFAULT;
1029 return err;
1030}
1031#endif
a885c8c4
CH		 1032
1033static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1034{
1035 drive_info_struct *drv = get_drv(bdev->bd_disk);
1036
1037 if (!drv->cylinders)
1038 return -ENXIO;
1039
1040 geo->heads = drv->heads;
1041 geo->sectors = drv->sectors;
1042 geo->cylinders = drv->cylinders;
1043 return 0;
1044}
1045
0a9279cc
MM		 1046static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1047{
1048 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1049 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1050 (void)check_for_unit_attention(host, c);
1051}
1da177e4 1052/*
7c832835 1053 * ioctl
1da177e4 1054 */
ef7822c2 1055static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1056 unsigned int cmd, unsigned long arg)
1da177e4 1057{
1da177e4
LT		 1058 struct gendisk *disk = bdev->bd_disk;
1059 ctlr_info_t *host = get_host(disk);
1060 drive_info_struct *drv = get_drv(disk);
1061 int ctlr = host->ctlr;
1062 void __user *argp = (void __user *)arg;
1063
1064#ifdef CCISS_DEBUG
1065 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1066#endif /* CCISS_DEBUG */
1067
1068 switch (cmd) {
1da177e4 1069 case CCISS_GETPCIINFO:
7c832835
BH		 1070 {
1071 cciss_pci_info_struct pciinfo;
1072
1073 if (!arg)
1074 return -EINVAL;
1075 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1076 pciinfo.bus = host->pdev->bus->number;
1077 pciinfo.dev_fn = host->pdev->devfn;
1078 pciinfo.board_id = host->board_id;
1079 if (copy_to_user
1080 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1081 return -EFAULT;
1082 return 0;
1083 }
1da177e4 1084 case CCISS_GETINTINFO:
7c832835
BH		 1085 {
1086 cciss_coalint_struct intinfo;
1087 if (!arg)
1088 return -EINVAL;
1089 intinfo.delay =
1090 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1091 intinfo.count =
1092 readl(&host->cfgtable->HostWrite.CoalIntCount);
1093 if (copy_to_user
1094 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1095 return -EFAULT;
1096 return 0;
1097 }
1da177e4 1098 case CCISS_SETINTINFO:
1da177e4 1099 {
7c832835
BH		 1100 cciss_coalint_struct intinfo;
1101 unsigned long flags;
1102 int i;
1103
1104 if (!arg)
1105 return -EINVAL;
1106 if (!capable(CAP_SYS_ADMIN))
1107 return -EPERM;
1108 if (copy_from_user
1109 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1110 return -EFAULT;
1111 if ((intinfo.delay == 0) && (intinfo.count == 0))
1112 {
1113// printk("cciss_ioctl: delay and count cannot be 0\n");
1114 return -EINVAL;
1115 }
1116 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1117 /* Update the field, and then ring the doorbell */
1118 writel(intinfo.delay,
1119 &(host->cfgtable->HostWrite.CoalIntDelay));
1120 writel(intinfo.count,
1121 &(host->cfgtable->HostWrite.CoalIntCount));
1122 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1123
1124 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1125 if (!(readl(host->vaddr + SA5_DOORBELL)
1126 & CFGTBL_ChangeReq))
1127 break;
1128 /* delay and try again */
1129 udelay(1000);
1130 }
1131 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1132 if (i >= MAX_IOCTL_CONFIG_WAIT)
1133 return -EAGAIN;
1134 return 0;
1da177e4 1135 }
1da177e4 1136 case CCISS_GETNODENAME:
7c832835
BH		 1137 {
1138 NodeName_type NodeName;
1139 int i;
1140
1141 if (!arg)
1142 return -EINVAL;
1143 for (i = 0; i < 16; i++)
1144 NodeName[i] =
1145 readb(&host->cfgtable->ServerName[i]);
1146 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1147 return -EFAULT;
1148 return 0;
1149 }
1da177e4 1150 case CCISS_SETNODENAME:
7c832835
BH		 1151 {
1152 NodeName_type NodeName;
1153 unsigned long flags;
1154 int i;
1155
1156 if (!arg)
1157 return -EINVAL;
1158 if (!capable(CAP_SYS_ADMIN))
1159 return -EPERM;
1160
1161 if (copy_from_user
1162 (NodeName, argp, sizeof(NodeName_type)))
1163 return -EFAULT;
1164
1165 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1166
1167 /* Update the field, and then ring the doorbell */
1168 for (i = 0; i < 16; i++)
1169 writeb(NodeName[i],
1170 &host->cfgtable->ServerName[i]);
1171
1172 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1173
1174 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1175 if (!(readl(host->vaddr + SA5_DOORBELL)
1176 & CFGTBL_ChangeReq))
1177 break;
1178 /* delay and try again */
1179 udelay(1000);
1180 }
1181 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1182 if (i >= MAX_IOCTL_CONFIG_WAIT)
1183 return -EAGAIN;
1184 return 0;
1185 }
1da177e4
LT		 1186
1187 case CCISS_GETHEARTBEAT:
7c832835
BH		 1188 {
1189 Heartbeat_type heartbeat;
1190
1191 if (!arg)
1192 return -EINVAL;
1193 heartbeat = readl(&host->cfgtable->HeartBeat);
1194 if (copy_to_user
1195 (argp, &heartbeat, sizeof(Heartbeat_type)))
1196 return -EFAULT;
1197 return 0;
1198 }
1da177e4 1199 case CCISS_GETBUSTYPES:
7c832835
BH		 1200 {
1201 BusTypes_type BusTypes;
1202
1203 if (!arg)
1204 return -EINVAL;
1205 BusTypes = readl(&host->cfgtable->BusTypes);
1206 if (copy_to_user
1207 (argp, &BusTypes, sizeof(BusTypes_type)))
1208 return -EFAULT;
1209 return 0;
1210 }
1da177e4 1211 case CCISS_GETFIRMVER:
7c832835
BH		 1212 {
1213 FirmwareVer_type firmware;
1da177e4 1214
7c832835
BH		 1215 if (!arg)
1216 return -EINVAL;
1217 memcpy(firmware, host->firm_ver, 4);
1da177e4 1218
7c832835
BH		 1219 if (copy_to_user
1220 (argp, firmware, sizeof(FirmwareVer_type)))
1221 return -EFAULT;
1222 return 0;
1223 }
1224 case CCISS_GETDRIVVER:
1225 {
1226 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1227
7c832835
BH		 1228 if (!arg)
1229 return -EINVAL;
1da177e4 1230
7c832835
BH		 1231 if (copy_to_user
1232 (argp, &DriverVer, sizeof(DriverVer_type)))
1233 return -EFAULT;
1234 return 0;
1235 }
1da177e4 1236
6ae5ce8e
MM		 1237 case CCISS_DEREGDISK:
1238 case CCISS_REGNEWD:
1da177e4 1239 case CCISS_REVALIDVOLS:
2d11d993 1240 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1241
1242 case CCISS_GETLUNINFO:{
1243 LogvolInfo_struct luninfo;
1244
39ccf9a6
SC		 1245 memcpy(&luninfo.LunID, drv->LunID,
1246 sizeof(luninfo.LunID));
7c832835
BH		 1247 luninfo.num_opens = drv->usage_count;
1248 luninfo.num_parts = 0;
1249 if (copy_to_user(argp, &luninfo,
1250 sizeof(LogvolInfo_struct)))
1251 return -EFAULT;
1252 return 0;
1253 }
1da177e4 1254 case CCISS_PASSTHRU:
1da177e4 1255 {
7c832835
BH		 1256 IOCTL_Command_struct iocommand;
1257 CommandList_struct *c;
1258 char *buff = NULL;
1259 u64bit temp64;
1260 unsigned long flags;
6e9a4738 1261 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1262
7c832835
BH		 1263 if (!arg)
1264 return -EINVAL;
1da177e4 1265
7c832835
BH		 1266 if (!capable(CAP_SYS_RAWIO))
1267 return -EPERM;
1da177e4 1268
7c832835
BH		 1269 if (copy_from_user
1270 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1271 return -EFAULT;
1272 if ((iocommand.buf_size < 1) &&
1273 (iocommand.Request.Type.Direction != XFER_NONE)) {
1274 return -EINVAL;
1275 }
1276#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1277 /* Check kmalloc limits */
1278 if (iocommand.buf_size > 128000)
1279 return -EINVAL;
1280#endif
1281 if (iocommand.buf_size > 0) {
1282 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1283 if (buff == NULL)
1284 return -EFAULT;
1285 }
1286 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1287 /* Copy the data into the buffer we created */
1288 if (copy_from_user
1289 (buff, iocommand.buf, iocommand.buf_size)) {
1290 kfree(buff);
1291 return -EFAULT;
1292 }
1293 } else {
1294 memset(buff, 0, iocommand.buf_size);
1295 }
1296 if ((c = cmd_alloc(host, 0)) == NULL) {
1297 kfree(buff);
1298 return -ENOMEM;
1299 }
1300 // Fill in the command type
1301 c->cmd_type = CMD_IOCTL_PEND;
1302 // Fill in Command Header
1303 c->Header.ReplyQueue = 0; // unused in simple mode
1304 if (iocommand.buf_size > 0) // buffer to fill
1305 {
1306 c->Header.SGList = 1;
1307 c->Header.SGTotal = 1;
1308 } else // no buffers to fill
1309 {
1310 c->Header.SGList = 0;
1311 c->Header.SGTotal = 0;
1312 }
1313 c->Header.LUN = iocommand.LUN_info;
1314 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1315
7c832835
BH		 1316 // Fill in Request block
1317 c->Request = iocommand.Request;
1da177e4 1318
7c832835
BH		 1319 // Fill in the scatter gather information
1320 if (iocommand.buf_size > 0) {
1321 temp64.val = pci_map_single(host->pdev, buff,
1322 iocommand.buf_size,
1323 PCI_DMA_BIDIRECTIONAL);
1324 c->SG[0].Addr.lower = temp64.val32.lower;
1325 c->SG[0].Addr.upper = temp64.val32.upper;
1326 c->SG[0].Len = iocommand.buf_size;
1327 c->SG[0].Ext = 0; // we are not chaining
1328 }
1329 c->waiting = &wait;
1330
1331 /* Put the request on the tail of the request queue */
1332 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1333 addQ(&host->reqQ, c);
1334 host->Qdepth++;
1335 start_io(host);
1336 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1337
1338 wait_for_completion(&wait);
1339
1340 /* unlock the buffers from DMA */
1341 temp64.val32.lower = c->SG[0].Addr.lower;
1342 temp64.val32.upper = c->SG[0].Addr.upper;
1343 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1344 iocommand.buf_size,
1345 PCI_DMA_BIDIRECTIONAL);
1346
0a9279cc
MM		 1347 check_ioctl_unit_attention(host, c);
1348
7c832835
BH		 1349 /* Copy the error information out */
1350 iocommand.error_info = *(c->err_info);
1351 if (copy_to_user
1352 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1353 kfree(buff);
1da177e4
LT		 1354 cmd_free(host, c, 0);
1355 return -EFAULT;
1356 }
7c832835
BH		 1357
1358 if (iocommand.Request.Type.Direction == XFER_READ) {
1359 /* Copy the data out of the buffer we created */
1360 if (copy_to_user
1361 (iocommand.buf, buff, iocommand.buf_size)) {
1362 kfree(buff);
1363 cmd_free(host, c, 0);
1364 return -EFAULT;
1365 }
1366 }
1367 kfree(buff);
1368 cmd_free(host, c, 0);
1369 return 0;
1da177e4 1370 }
7c832835
BH		 1371 case CCISS_BIG_PASSTHRU:{
1372 BIG_IOCTL_Command_struct *ioc;
1373 CommandList_struct *c;
1374 unsigned char **buff = NULL;
1375 int *buff_size = NULL;
1376 u64bit temp64;
1377 unsigned long flags;
1378 BYTE sg_used = 0;
1379 int status = 0;
1380 int i;
6e9a4738 1381 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1382 __u32 left;
1383 __u32 sz;
1384 BYTE __user *data_ptr;
1385
1386 if (!arg)
1387 return -EINVAL;
1388 if (!capable(CAP_SYS_RAWIO))
1389 return -EPERM;
1390 ioc = (BIG_IOCTL_Command_struct *)
1391 kmalloc(sizeof(*ioc), GFP_KERNEL);
1392 if (!ioc) {
1393 status = -ENOMEM;
1394 goto cleanup1;
1395 }
1396 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1397 status = -EFAULT;
1398 goto cleanup1;
1399 }
1400 if ((ioc->buf_size < 1) &&
1401 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1402 status = -EINVAL;
1403 goto cleanup1;
7c832835
BH		 1404 }
1405 /* Check kmalloc limits using all SGs */
1406 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1407 status = -EINVAL;
1408 goto cleanup1;
1409 }
1410 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1411 status = -EINVAL;
1412 goto cleanup1;
1413 }
1414 buff =
1415 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1416 if (!buff) {
1da177e4
LT		 1417 status = -ENOMEM;
1418 goto cleanup1;
1419 }
5cbded58 1420 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1421 GFP_KERNEL);
1422 if (!buff_size) {
1423 status = -ENOMEM;
1424 goto cleanup1;
1425 }
1426 left = ioc->buf_size;
1427 data_ptr = ioc->buf;
1428 while (left) {
1429 sz = (left >
1430 ioc->malloc_size) ? ioc->
1431 malloc_size : left;
1432 buff_size[sg_used] = sz;
1433 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1434 if (buff[sg_used] == NULL) {
1da177e4 1435 status = -ENOMEM;
15534d38
JA		 1436 goto cleanup1;
1437 }
7c832835
BH		 1438 if (ioc->Request.Type.Direction == XFER_WRITE) {
1439 if (copy_from_user
1440 (buff[sg_used], data_ptr, sz)) {
f7108f91 1441 status = -EFAULT;
7c832835
BH		 1442 goto cleanup1;
1443 }
1444 } else {
1445 memset(buff[sg_used], 0, sz);
1446 }
1447 left -= sz;
1448 data_ptr += sz;
1449 sg_used++;
1450 }
1451 if ((c = cmd_alloc(host, 0)) == NULL) {
1452 status = -ENOMEM;
1453 goto cleanup1;
1454 }
1455 c->cmd_type = CMD_IOCTL_PEND;
1456 c->Header.ReplyQueue = 0;
1457
1458 if (ioc->buf_size > 0) {
1459 c->Header.SGList = sg_used;
1460 c->Header.SGTotal = sg_used;
1da177e4 1461 } else {
7c832835
BH		 1462 c->Header.SGList = 0;
1463 c->Header.SGTotal = 0;
1da177e4 1464 }
7c832835
BH		 1465 c->Header.LUN = ioc->LUN_info;
1466 c->Header.Tag.lower = c->busaddr;
1467
1468 c->Request = ioc->Request;
1469 if (ioc->buf_size > 0) {
1470 int i;
1471 for (i = 0; i < sg_used; i++) {
1472 temp64.val =
1473 pci_map_single(host->pdev, buff[i],
1474 buff_size[i],
1475 PCI_DMA_BIDIRECTIONAL);
1476 c->SG[i].Addr.lower =
1477 temp64.val32.lower;
1478 c->SG[i].Addr.upper =
1479 temp64.val32.upper;
1480 c->SG[i].Len = buff_size[i];
1481 c->SG[i].Ext = 0; /* we are not chaining */
1482 }
1483 }
1484 c->waiting = &wait;
1485 /* Put the request on the tail of the request queue */
1486 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1487 addQ(&host->reqQ, c);
1488 host->Qdepth++;
1489 start_io(host);
1490 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1491 wait_for_completion(&wait);
1492 /* unlock the buffers from DMA */
1493 for (i = 0; i < sg_used; i++) {
1494 temp64.val32.lower = c->SG[i].Addr.lower;
1495 temp64.val32.upper = c->SG[i].Addr.upper;
1496 pci_unmap_single(host->pdev,
1497 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1498 PCI_DMA_BIDIRECTIONAL);
1da177e4 1499 }
0a9279cc 1500 check_ioctl_unit_attention(host, c);
7c832835
BH		 1501 /* Copy the error information out */
1502 ioc->error_info = *(c->err_info);
1503 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1504 cmd_free(host, c, 0);
1505 status = -EFAULT;
1506 goto cleanup1;
1507 }
1508 if (ioc->Request.Type.Direction == XFER_READ) {
1509 /* Copy the data out of the buffer we created */
1510 BYTE __user *ptr = ioc->buf;
1511 for (i = 0; i < sg_used; i++) {
1512 if (copy_to_user
1513 (ptr, buff[i], buff_size[i])) {
1514 cmd_free(host, c, 0);
1515 status = -EFAULT;
1516 goto cleanup1;
1517 }
1518 ptr += buff_size[i];
1da177e4 1519 }
1da177e4 1520 }
7c832835
BH		 1521 cmd_free(host, c, 0);
1522 status = 0;
1523 cleanup1:
1524 if (buff) {
1525 for (i = 0; i < sg_used; i++)
1526 kfree(buff[i]);
1527 kfree(buff);
1528 }
1529 kfree(buff_size);
1530 kfree(ioc);
1531 return status;
1da177e4 1532 }
03bbfee5
MMOD		 1533
1534 /* scsi_cmd_ioctl handles these, below, though some are not */
1535 /* very meaningful for cciss. SG_IO is the main one people want. */
1536
1537 case SG_GET_VERSION_NUM:
1538 case SG_SET_TIMEOUT:
1539 case SG_GET_TIMEOUT:
1540 case SG_GET_RESERVED_SIZE:
1541 case SG_SET_RESERVED_SIZE:
1542 case SG_EMULATED_HOST:
1543 case SG_IO:
1544 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1545 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1546
1547 /* scsi_cmd_ioctl would normally handle these, below, but */
1548 /* they aren't a good fit for cciss, as CD-ROMs are */
1549 /* not supported, and we don't have any bus/target/lun */
1550 /* which we present to the kernel. */
1551
1552 case CDROM_SEND_PACKET:
1553 case CDROMCLOSETRAY:
1554 case CDROMEJECT:
1555 case SCSI_IOCTL_GET_IDLUN:
1556 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1557 default:
1558 return -ENOTTY;
1559 }
1da177e4
LT		 1560}
1561
7b30f092
JA		 1562static void cciss_check_queues(ctlr_info_t *h)
1563{
1564 int start_queue = h->next_to_run;
1565 int i;
1566
1567 /* check to see if we have maxed out the number of commands that can
1568 * be placed on the queue. If so then exit. We do this check here
1569 * in case the interrupt we serviced was from an ioctl and did not
1570 * free any new commands.
1571 */
f880632f 1572 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1573 return;
1574
1575 /* We have room on the queue for more commands. Now we need to queue
1576 * them up. We will also keep track of the next queue to run so
1577 * that every queue gets a chance to be started first.
1578 */
1579 for (i = 0; i < h->highest_lun + 1; i++) {
1580 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1581 /* make sure the disk has been added and the drive is real
1582 * because this can be called from the middle of init_one.
1583 */
1584 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1585 continue;
1586 blk_start_queue(h->gendisk[curr_queue]->queue);
1587
1588 /* check to see if we have maxed out the number of commands
1589 * that can be placed on the queue.
1590 */
f880632f 1591 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1592 if (curr_queue == start_queue) {
1593 h->next_to_run =
1594 (start_queue + 1) % (h->highest_lun + 1);
1595 break;
1596 } else {
1597 h->next_to_run = curr_queue;
1598 break;
1599 }
7b30f092
JA		 1600 }
1601 }
1602}
1603
ca1e0484
MM		 1604static void cciss_softirq_done(struct request *rq)
1605{
1606 CommandList_struct *cmd = rq->completion_data;
1607 ctlr_info_t *h = hba[cmd->ctlr];
1608 unsigned long flags;
1609 u64bit temp64;
1610 int i, ddir;
1611
1612 if (cmd->Request.Type.Direction == XFER_READ)
1613 ddir = PCI_DMA_FROMDEVICE;
1614 else
1615 ddir = PCI_DMA_TODEVICE;
1616
1617 /* command did not need to be retried */
1618 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1619 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1620 temp64.val32.lower = cmd->SG[i].Addr.lower;
1621 temp64.val32.upper = cmd->SG[i].Addr.upper;
1622 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1623 }
1624
ca1e0484
MM		 1625#ifdef CCISS_DEBUG
1626 printk("Done with %p\n", rq);
7c832835 1627#endif /* CCISS_DEBUG */
ca1e0484 1628
c3a4d78c 1629 /* set the residual count for pc requests */
ac44e5b2 1630 if (blk_pc_request(rq))
c3a4d78c 1631 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1632
c3a4d78c 1633 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1634
ca1e0484 1635 spin_lock_irqsave(&h->lock, flags);
7c832835 1636 cmd_free(h, cmd, 1);
7b30f092 1637 cciss_check_queues(h);
ca1e0484
MM		 1638 spin_unlock_irqrestore(&h->lock, flags);
1639}
1640
39ccf9a6
SC		 1641static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1642 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1643{
39ccf9a6
SC		 1644 memcpy(scsi3addr, h->drv[log_unit].LunID,
1645 sizeof(h->drv[log_unit].LunID));
b57695fe 1646}
1647
7fe06326
AP		 1648/* This function gets the SCSI vendor, model, and revision of a logical drive
1649 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1650 * they cannot be read.
1651 */
1652static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1653 char *vendor, char *model, char *rev)
1654{
1655 int rc;
1656 InquiryData_struct *inq_buf;
b57695fe 1657 unsigned char scsi3addr[8];
7fe06326
AP		 1658
1659 *vendor = '\0';
1660 *model = '\0';
1661 *rev = '\0';
1662
1663 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1664 if (!inq_buf)
1665 return;
1666
b57695fe 1667 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1668 if (withirq)
1669 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1670 sizeof(InquiryData_struct), 0,
1671 scsi3addr, TYPE_CMD);
7fe06326
AP		 1672 else
1673 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1674 sizeof(InquiryData_struct), 0,
1675 scsi3addr, TYPE_CMD);
7fe06326
AP		 1676 if (rc == IO_OK) {
1677 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1678 vendor[VENDOR_LEN] = '\0';
1679 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1680 model[MODEL_LEN] = '\0';
1681 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1682 rev[REV_LEN] = '\0';
1683 }
1684
1685 kfree(inq_buf);
1686 return;
1687}
1688
a72da29b
MM		 1689/* This function gets the serial number of a logical drive via
1690 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1691 * number cannot be had, for whatever reason, 16 bytes of 0xff
1692 * are returned instead.
1693 */
1694static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1695 unsigned char *serial_no, int buflen)
1696{
1697#define PAGE_83_INQ_BYTES 64
1698 int rc;
1699 unsigned char *buf;
b57695fe 1700 unsigned char scsi3addr[8];
a72da29b
MM		 1701
1702 if (buflen > 16)
1703 buflen = 16;
1704 memset(serial_no, 0xff, buflen);
1705 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1706 if (!buf)
1707 return;
1708 memset(serial_no, 0, buflen);
b57695fe 1709 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1710 if (withirq)
1711 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1712 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1713 else
1714 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1715 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1716 if (rc == IO_OK)
1717 memcpy(serial_no, &buf[8], buflen);
1718 kfree(buf);
1719 return;
1720}
1721
617e1344
SC		 1722/*
1723 * cciss_add_disk sets up the block device queue for a logical drive
1724 */
1725static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1726 int drv_index)
1727{
1728 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1729 if (!disk->queue)
1730 goto init_queue_failure;
6ae5ce8e
MM		 1731 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1732 disk->major = h->major;
1733 disk->first_minor = drv_index << NWD_SHIFT;
1734 disk->fops = &cciss_fops;
617e1344
SC		 1735 if (h->drv[drv_index].dev == NULL) {
1736 if (cciss_create_ld_sysfs_entry(h, drv_index))
1737 goto cleanup_queue;
1738 }
6ae5ce8e 1739 disk->private_data = &h->drv[drv_index];
617e1344 1740 disk->driverfs_dev = h->drv[drv_index].dev;
6ae5ce8e
MM		 1741
1742 /* Set up queue information */
1743 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1744
1745 /* This is a hardware imposed limit. */
1746 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1747
1748 /* This is a limit in the driver and could be eliminated. */
1749 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1750
1751 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1752
1753 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1754
1755 disk->queue->queuedata = h;
1756
e1defc4f
MP		 1757 blk_queue_logical_block_size(disk->queue,
1758 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1759
1760 /* Make sure all queue data is written out before */
1761 /* setting h->drv[drv_index].queue, as setting this */
1762 /* allows the interrupt handler to start the queue */
1763 wmb();
1764 h->drv[drv_index].queue = disk->queue;
1765 add_disk(disk);
617e1344
SC		 1766 return 0;
1767
1768cleanup_queue:
1769 blk_cleanup_queue(disk->queue);
1770 disk->queue = NULL;
e8074f79 1771init_queue_failure:
617e1344 1772 return -1;
6ae5ce8e
MM		 1773}
1774
ddd47442 1775/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1776 * If the usage_count is zero and it is a heretofore unknown drive, or,
1777 * the drive's capacity, geometry, or serial number has changed,
1778 * then the drive information will be updated and the disk will be
1779 * re-registered with the kernel. If these conditions don't hold,
1780 * then it will be left alone for the next reboot. The exception to this
1781 * is disk 0 which will always be left registered with the kernel since it
1782 * is also the controller node. Any changes to disk 0 will show up on
1783 * the next reboot.
7c832835 1784 */
2d11d993
SC		 1785static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1786 int via_ioctl)
7c832835 1787{
ddd47442
MM		 1788 ctlr_info_t *h = hba[ctlr];
1789 struct gendisk *disk;
ddd47442
MM		 1790 InquiryData_struct *inq_buff = NULL;
1791 unsigned int block_size;
00988a35 1792 sector_t total_size;
ddd47442
MM		 1793 unsigned long flags = 0;
1794 int ret = 0;
a72da29b
MM		 1795 drive_info_struct *drvinfo;
1796
1797 /* Get information about the disk and modify the driver structure */
1798 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1799 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1800 if (inq_buff == NULL || drvinfo == NULL)
1801 goto mem_msg;
1802
1803 /* testing to see if 16-byte CDBs are already being used */
1804 if (h->cciss_read == CCISS_READ_16) {
1805 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1806 &total_size, &block_size);
1807
1808 } else {
1809 cciss_read_capacity(ctlr, drv_index, 1,
1810 &total_size, &block_size);
1811
1812 /* if read_capacity returns all F's this volume is >2TB */
1813 /* in size so we switch to 16-byte CDB's for all */
1814 /* read/write ops */
1815 if (total_size == 0xFFFFFFFFULL) {
1816 cciss_read_capacity_16(ctlr, drv_index, 1,
1817 &total_size, &block_size);
1818 h->cciss_read = CCISS_READ_16;
1819 h->cciss_write = CCISS_WRITE_16;
1820 } else {
1821 h->cciss_read = CCISS_READ_10;
1822 h->cciss_write = CCISS_WRITE_10;
1823 }
1824 }
1825
1826 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1827 inq_buff, drvinfo);
1828 drvinfo->block_size = block_size;
1829 drvinfo->nr_blocks = total_size + 1;
1830
7fe06326
AP		 1831 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1832 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1833 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1834 sizeof(drvinfo->serial_no));
1835
1836 /* Is it the same disk we already know, and nothing's changed? */
1837 if (h->drv[drv_index].raid_level != -1 &&
1838 ((memcmp(drvinfo->serial_no,
1839 h->drv[drv_index].serial_no, 16) == 0) &&
1840 drvinfo->block_size == h->drv[drv_index].block_size &&
1841 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1842 drvinfo->heads == h->drv[drv_index].heads &&
1843 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1844 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1845 /* The disk is unchanged, nothing to update */
1846 goto freeret;
a72da29b 1847
6ae5ce8e
MM		 1848 /* If we get here it's not the same disk, or something's changed,
1849 * so we need to * deregister it, and re-register it, if it's not
1850 * in use.
1851 * If the disk already exists then deregister it before proceeding
1852 * (unless it's the first disk (for the controller node).
1853 */
a72da29b
MM		 1854 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1855 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1856 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1857 h->drv[drv_index].busy_configuring = 1;
1858 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1859
6ae5ce8e
MM		 1860 /* deregister_disk sets h->drv[drv_index].queue = NULL
1861 * which keeps the interrupt handler from starting
1862 * the queue.
1863 */
2d11d993 1864 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1865 h->drv[drv_index].busy_configuring = 0;
1866 }
1867
1868 /* If the disk is in use return */
1869 if (ret)
a72da29b
MM		 1870 goto freeret;
1871
6ae5ce8e
MM		 1872 /* Save the new information from cciss_geometry_inquiry
1873 * and serial number inquiry.
1874 */
a72da29b
MM		 1875 h->drv[drv_index].block_size = drvinfo->block_size;
1876 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1877 h->drv[drv_index].heads = drvinfo->heads;
1878 h->drv[drv_index].sectors = drvinfo->sectors;
1879 h->drv[drv_index].cylinders = drvinfo->cylinders;
1880 h->drv[drv_index].raid_level = drvinfo->raid_level;
1881 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1882 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1883 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1884 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1885
1886 ++h->num_luns;
1887 disk = h->gendisk[drv_index];
1888 set_capacity(disk, h->drv[drv_index].nr_blocks);
1889
6ae5ce8e
MM		 1890 /* If it's not disk 0 (drv_index != 0)
1891 * or if it was disk 0, but there was previously
1892 * no actual corresponding configured logical drive
1893 * (raid_leve == -1) then we want to update the
1894 * logical drive's information.
1895 */
361e9b07
SC		 1896 if (drv_index || first_time) {
1897 if (cciss_add_disk(h, disk, drv_index) != 0) {
1898 cciss_free_gendisk(h, drv_index);
1899 printk(KERN_WARNING "cciss:%d could not update "
1900 "disk %d\n", h->ctlr, drv_index);
1901 --h->num_luns;
1902 }
1903 }
ddd47442 1904
6ae5ce8e 1905freeret:
ddd47442 1906 kfree(inq_buff);
a72da29b 1907 kfree(drvinfo);
ddd47442 1908 return;
6ae5ce8e 1909mem_msg:
ddd47442
MM		 1910 printk(KERN_ERR "cciss: out of memory\n");
1911 goto freeret;
1912}
1913
1914/* This function will find the first index of the controllers drive array
1915 * that has a -1 for the raid_level and will return that index. This is
1916 * where new drives will be added. If the index to be returned is greater
1917 * than the highest_lun index for the controller then highest_lun is set
1918 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1919 * "controller_node" is used to know if this is a real logical drive, or just
1920 * the controller node, which determines if this counts towards highest_lun.
7c832835 1921 */
eece695f 1922static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1923{
1924 int i;
1925
7c832835
BH		 1926 for (i = 0; i < CISS_MAX_LUN; i++) {
1927 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1928 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1929 if (!controller_node)
1930 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1931 return i;
1932 }
1933 }
1934 return -1;
1935}
1936
361e9b07
SC		 1937static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
1938{
1939 put_disk(h->gendisk[drv_index]);
1940 h->gendisk[drv_index] = NULL;
1941}
1942
6ae5ce8e
MM		 1943/* cciss_add_gendisk finds a free hba[]->drv structure
1944 * and allocates a gendisk if needed, and sets the lunid
1945 * in the drvinfo structure. It returns the index into
1946 * the ->drv[] array, or -1 if none are free.
1947 * is_controller_node indicates whether highest_lun should
1948 * count this disk, or if it's only being added to provide
1949 * a means to talk to the controller in case no logical
1950 * drives have yet been configured.
1951 */
39ccf9a6
SC		 1952static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
1953 int controller_node)
6ae5ce8e
MM		 1954{
1955 int drv_index;
1956
eece695f 1957 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1958 if (drv_index == -1)
1959 return -1;
8ce51966 1960
6ae5ce8e
MM		 1961 /*Check if the gendisk needs to be allocated */
1962 if (!h->gendisk[drv_index]) {
1963 h->gendisk[drv_index] =
1964 alloc_disk(1 << NWD_SHIFT);
1965 if (!h->gendisk[drv_index]) {
1966 printk(KERN_ERR "cciss%d: could not "
1967 "allocate a new disk %d\n",
1968 h->ctlr, drv_index);
1969 return -1;
1970 }
1971 }
39ccf9a6
SC		 1972 memcpy(h->drv[drv_index].LunID, lunid,
1973 sizeof(h->drv[drv_index].LunID));
097d0264
SC		 1974 if (h->drv[drv_index].dev == NULL) {
1975 if (cciss_create_ld_sysfs_entry(h, drv_index))
1976 goto err_free_disk;
1977 }
6ae5ce8e
MM		 1978 /* Don't need to mark this busy because nobody */
1979 /* else knows about this disk yet to contend */
1980 /* for access to it. */
1981 h->drv[drv_index].busy_configuring = 0;
1982 wmb();
1983 return drv_index;
7fe06326
AP		 1984
1985err_free_disk:
361e9b07 1986 cciss_free_gendisk(h, drv_index);
7fe06326 1987 return -1;
6ae5ce8e
MM		 1988}
1989
1990/* This is for the special case of a controller which
1991 * has no logical drives. In this case, we still need
1992 * to register a disk so the controller can be accessed
1993 * by the Array Config Utility.
1994 */
1995static void cciss_add_controller_node(ctlr_info_t *h)
1996{
1997 struct gendisk *disk;
1998 int drv_index;
1999
2000 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2001 return;
2002
39ccf9a6 2003 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2004 if (drv_index == -1)
2005 goto error;
6ae5ce8e
MM		 2006 h->drv[drv_index].block_size = 512;
2007 h->drv[drv_index].nr_blocks = 0;
2008 h->drv[drv_index].heads = 0;
2009 h->drv[drv_index].sectors = 0;
2010 h->drv[drv_index].cylinders = 0;
2011 h->drv[drv_index].raid_level = -1;
2012 memset(h->drv[drv_index].serial_no, 0, 16);
2013 disk = h->gendisk[drv_index];
361e9b07
SC		 2014 if (cciss_add_disk(h, disk, drv_index) == 0)
2015 return;
2016 cciss_free_gendisk(h, drv_index);
2017error:
2018 printk(KERN_WARNING "cciss%d: could not "
2019 "add disk 0.\n", h->ctlr);
2020 return;
6ae5ce8e
MM		 2021}
2022
ddd47442 2023/* This function will add and remove logical drives from the Logical
d14c4ab5 2024 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2025 * so that mount points are preserved until the next reboot. This allows
2026 * for the removal of logical drives in the middle of the drive array
2027 * without a re-ordering of those drives.
2028 * INPUT
2029 * h = The controller to perform the operations on
7c832835 2030 */
2d11d993
SC		 2031static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2032 int via_ioctl)
1da177e4 2033{
ddd47442
MM		 2034 int ctlr = h->ctlr;
2035 int num_luns;
2036 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2037 int return_code;
2038 int listlength = 0;
2039 int i;
2040 int drv_found;
2041 int drv_index = 0;
39ccf9a6 2042 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2043 unsigned long flags;
ddd47442 2044
6ae5ce8e
MM		 2045 if (!capable(CAP_SYS_RAWIO))
2046 return -EPERM;
2047
ddd47442
MM		 2048 /* Set busy_configuring flag for this operation */
2049 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2050 if (h->busy_configuring) {
ddd47442
MM		 2051 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2052 return -EBUSY;
2053 }
2054 h->busy_configuring = 1;
a72da29b 2055 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2056
a72da29b
MM		 2057 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2058 if (ld_buff == NULL)
2059 goto mem_msg;
2060
2061 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2062 sizeof(ReportLunData_struct),
2063 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2064
a72da29b
MM		 2065 if (return_code == IO_OK)
2066 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2067 else { /* reading number of logical volumes failed */
2068 printk(KERN_WARNING "cciss: report logical volume"
2069 " command failed\n");
2070 listlength = 0;
2071 goto freeret;
2072 }
2073
2074 num_luns = listlength / 8; /* 8 bytes per entry */
2075 if (num_luns > CISS_MAX_LUN) {
2076 num_luns = CISS_MAX_LUN;
2077 printk(KERN_WARNING "cciss: more luns configured"
2078 " on controller than can be handled by"
2079 " this driver.\n");
2080 }
2081
6ae5ce8e
MM		 2082 if (num_luns == 0)
2083 cciss_add_controller_node(h);
2084
2085 /* Compare controller drive array to driver's drive array
2086 * to see if any drives are missing on the controller due
2087 * to action of Array Config Utility (user deletes drive)
2088 * and deregister logical drives which have disappeared.
2089 */
a72da29b
MM		 2090 for (i = 0; i <= h->highest_lun; i++) {
2091 int j;
2092 drv_found = 0;
d8a0be6a
SC		 2093
2094 /* skip holes in the array from already deleted drives */
2095 if (h->drv[i].raid_level == -1)
2096 continue;
2097
a72da29b 2098 for (j = 0; j < num_luns; j++) {
39ccf9a6
SC		 2099 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2100 if (memcmp(h->drv[i].LunID, lunid,
2101 sizeof(lunid)) == 0) {
a72da29b
MM		 2102 drv_found = 1;
2103 break;
2104 }
2105 }
2106 if (!drv_found) {
2107 /* Deregister it from the OS, it's gone. */
2108 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2109 h->drv[i].busy_configuring = 1;
2110 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2111 return_code = deregister_disk(h, i, 1, via_ioctl);
a72da29b 2112 h->drv[i].busy_configuring = 0;
ddd47442 2113 }
a72da29b 2114 }
ddd47442 2115
a72da29b
MM		 2116 /* Compare controller drive array to driver's drive array.
2117 * Check for updates in the drive information and any new drives
2118 * on the controller due to ACU adding logical drives, or changing
2119 * a logical drive's size, etc. Reregister any new/changed drives
2120 */
2121 for (i = 0; i < num_luns; i++) {
2122 int j;
ddd47442 2123
a72da29b 2124 drv_found = 0;
ddd47442 2125
39ccf9a6 2126 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2127 /* Find if the LUN is already in the drive array
2128 * of the driver. If so then update its info
2129 * if not in use. If it does not exist then find
2130 * the first free index and add it.
2131 */
2132 for (j = 0; j <= h->highest_lun; j++) {
2133 if (h->drv[j].raid_level != -1 &&
39ccf9a6
SC		 2134 memcmp(h->drv[j].LunID, lunid,
2135 sizeof(h->drv[j].LunID)) == 0) {
a72da29b
MM		 2136 drv_index = j;
2137 drv_found = 1;
2138 break;
ddd47442 2139 }
a72da29b 2140 }
ddd47442 2141
a72da29b
MM		 2142 /* check if the drive was found already in the array */
2143 if (!drv_found) {
eece695f 2144 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2145 if (drv_index == -1)
2146 goto freeret;
a72da29b 2147 }
2d11d993
SC		 2148 cciss_update_drive_info(ctlr, drv_index, first_time,
2149 via_ioctl);
a72da29b 2150 } /* end for */
ddd47442 2151
6ae5ce8e 2152freeret:
ddd47442
MM		 2153 kfree(ld_buff);
2154 h->busy_configuring = 0;
2155 /* We return -1 here to tell the ACU that we have registered/updated
2156 * all of the drives that we can and to keep it from calling us
2157 * additional times.
7c832835 2158 */
ddd47442 2159 return -1;
6ae5ce8e 2160mem_msg:
ddd47442 2161 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2162 h->busy_configuring = 0;
ddd47442
MM		 2163 goto freeret;
2164}
2165
9ddb27b4
SC		 2166static void cciss_clear_drive_info(drive_info_struct *drive_info)
2167{
2168 /* zero out the disk size info */
2169 drive_info->nr_blocks = 0;
2170 drive_info->block_size = 0;
2171 drive_info->heads = 0;
2172 drive_info->sectors = 0;
2173 drive_info->cylinders = 0;
2174 drive_info->raid_level = -1;
2175 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2176 memset(drive_info->model, 0, sizeof(drive_info->model));
2177 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2178 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2179 /*
2180 * don't clear the LUNID though, we need to remember which
2181 * one this one is.
2182 */
2183}
2184
ddd47442
MM		 2185/* This function will deregister the disk and it's queue from the
2186 * kernel. It must be called with the controller lock held and the
2187 * drv structures busy_configuring flag set. It's parameters are:
2188 *
2189 * disk = This is the disk to be deregistered
2190 * drv = This is the drive_info_struct associated with the disk to be
2191 * deregistered. It contains information about the disk used
2192 * by the driver.
2193 * clear_all = This flag determines whether or not the disk information
2194 * is going to be completely cleared out and the highest_lun
2195 * reset. Sometimes we want to clear out information about
d14c4ab5 2196 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2197 * the highest_lun should be left unchanged and the LunID
2198 * should not be cleared.
2d11d993
SC		 2199 * via_ioctl
2200 * This indicates whether we've reached this path via ioctl.
2201 * This affects the maximum usage count allowed for c0d0 to be messed with.
2202 * If this path is reached via ioctl(), then the max_usage_count will
2203 * be 1, as the process calling ioctl() has got to have the device open.
2204 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2205*/
a0ea8622 2206static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2207 int clear_all, int via_ioctl)
ddd47442 2208{
799202cb 2209 int i;
a0ea8622
SC		 2210 struct gendisk *disk;
2211 drive_info_struct *drv;
1da177e4
LT		 2212
2213 if (!capable(CAP_SYS_RAWIO))
2214 return -EPERM;
2215
a0ea8622
SC		 2216 drv = &h->drv[drv_index];
2217 disk = h->gendisk[drv_index];
2218
1da177e4 2219 /* make sure logical volume is NOT is use */
7c832835 2220 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2221 if (drv->usage_count > via_ioctl)
7c832835
BH		 2222 return -EBUSY;
2223 } else if (drv->usage_count > 0)
2224 return -EBUSY;
1da177e4 2225
ddd47442
MM		 2226 /* invalidate the devices and deregister the disk. If it is disk
2227 * zero do not deregister it but just zero out it's values. This
2228 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2229 */
2230 if (h->gendisk[0] != disk) {
5a9df732 2231 struct request_queue *q = disk->queue;
097d0264 2232 if (disk->flags & GENHD_FL_UP) {
8ce51966 2233 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2234 del_gendisk(disk);
097d0264 2235 }
5a9df732
AB		 2236 if (q) {
2237 blk_cleanup_queue(q);
2238 /* Set drv->queue to NULL so that we do not try
2239 * to call blk_start_queue on this queue in the
2240 * interrupt handler
2241 */
2242 drv->queue = NULL;
2243 }
2244 /* If clear_all is set then we are deleting the logical
2245 * drive, not just refreshing its info. For drives
2246 * other than disk 0 we will call put_disk. We do not
2247 * do this for disk 0 as we need it to be able to
2248 * configure the controller.
a72da29b 2249 */
5a9df732
AB		 2250 if (clear_all){
2251 /* This isn't pretty, but we need to find the
2252 * disk in our array and NULL our the pointer.
2253 * This is so that we will call alloc_disk if
2254 * this index is used again later.
a72da29b 2255 */
5a9df732 2256 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2257 if (h->gendisk[i] == disk) {
5a9df732
AB		 2258 h->gendisk[i] = NULL;
2259 break;
799202cb 2260 }
799202cb 2261 }
5a9df732 2262 put_disk(disk);
ddd47442 2263 }
799202cb
MM		 2264 } else {
2265 set_capacity(disk, 0);
ddd47442
MM		 2266 }
2267
2268 --h->num_luns;
9ddb27b4
SC		 2269 cciss_clear_drive_info(drv);
2270
7c832835
BH		 2271 if (clear_all) {
2272 /* check to see if it was the last disk */
2273 if (drv == h->drv + h->highest_lun) {
2274 /* if so, find the new hightest lun */
2275 int i, newhighest = -1;
a72da29b 2276 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2277 /* if the disk has size > 0, it is available */
ddd47442 2278 if (h->drv[i].heads)
7c832835
BH		 2279 newhighest = i;
2280 }
2281 h->highest_lun = newhighest;
1da177e4 2282 }
39ccf9a6 2283 memset(drv->LunID, 0, sizeof(drv->LunID));
ddd47442 2284 }
e2019b58 2285 return 0;
1da177e4 2286}
ddd47442 2287
b57695fe 2288static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2289 size_t size, __u8 page_code, unsigned char *scsi3addr,
2290 int cmd_type)
1da177e4 2291{
7c832835 2292 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2293 u64bit buff_dma_handle;
2294 int status = IO_OK;
2295
2296 c->cmd_type = CMD_IOCTL_PEND;
2297 c->Header.ReplyQueue = 0;
7c832835 2298 if (buff != NULL) {
1da177e4 2299 c->Header.SGList = 1;
7c832835 2300 c->Header.SGTotal = 1;
1da177e4
LT		 2301 } else {
2302 c->Header.SGList = 0;
7c832835 2303 c->Header.SGTotal = 0;
1da177e4
LT		 2304 }
2305 c->Header.Tag.lower = c->busaddr;
b57695fe 2306 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2307
2308 c->Request.Type.Type = cmd_type;
2309 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2310 switch (cmd) {
2311 case CISS_INQUIRY:
1da177e4 2312 /* are we trying to read a vital product page */
7c832835 2313 if (page_code != 0) {
1da177e4
LT		 2314 c->Request.CDB[1] = 0x01;
2315 c->Request.CDB[2] = page_code;
2316 }
2317 c->Request.CDBLen = 6;
7c832835 2318 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2319 c->Request.Type.Direction = XFER_READ;
2320 c->Request.Timeout = 0;
7c832835
BH		 2321 c->Request.CDB[0] = CISS_INQUIRY;
2322 c->Request.CDB[4] = size & 0xFF;
2323 break;
1da177e4
LT		 2324 case CISS_REPORT_LOG:
2325 case CISS_REPORT_PHYS:
7c832835 2326 /* Talking to controller so It's a physical command
1da177e4 2327 mode = 00 target = 0. Nothing to write.
7c832835 2328 */
1da177e4
LT		 2329 c->Request.CDBLen = 12;
2330 c->Request.Type.Attribute = ATTR_SIMPLE;
2331 c->Request.Type.Direction = XFER_READ;
2332 c->Request.Timeout = 0;
2333 c->Request.CDB[0] = cmd;
7c832835 2334 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2335 c->Request.CDB[7] = (size >> 16) & 0xFF;
2336 c->Request.CDB[8] = (size >> 8) & 0xFF;
2337 c->Request.CDB[9] = size & 0xFF;
2338 break;
2339
2340 case CCISS_READ_CAPACITY:
1da177e4
LT		 2341 c->Request.CDBLen = 10;
2342 c->Request.Type.Attribute = ATTR_SIMPLE;
2343 c->Request.Type.Direction = XFER_READ;
2344 c->Request.Timeout = 0;
2345 c->Request.CDB[0] = cmd;
7c832835 2346 break;
00988a35 2347 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2348 c->Request.CDBLen = 16;
2349 c->Request.Type.Attribute = ATTR_SIMPLE;
2350 c->Request.Type.Direction = XFER_READ;
2351 c->Request.Timeout = 0;
2352 c->Request.CDB[0] = cmd;
2353 c->Request.CDB[1] = 0x10;
2354 c->Request.CDB[10] = (size >> 24) & 0xFF;
2355 c->Request.CDB[11] = (size >> 16) & 0xFF;
2356 c->Request.CDB[12] = (size >> 8) & 0xFF;
2357 c->Request.CDB[13] = size & 0xFF;
2358 c->Request.Timeout = 0;
2359 c->Request.CDB[0] = cmd;
2360 break;
1da177e4
LT		 2361 case CCISS_CACHE_FLUSH:
2362 c->Request.CDBLen = 12;
2363 c->Request.Type.Attribute = ATTR_SIMPLE;
2364 c->Request.Type.Direction = XFER_WRITE;
2365 c->Request.Timeout = 0;
2366 c->Request.CDB[0] = BMIC_WRITE;
2367 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2368 break;
88f627ae 2369 case TEST_UNIT_READY:
88f627ae
SC		 2370 c->Request.CDBLen = 6;
2371 c->Request.Type.Attribute = ATTR_SIMPLE;
2372 c->Request.Type.Direction = XFER_NONE;
2373 c->Request.Timeout = 0;
2374 break;
1da177e4
LT		 2375 default:
2376 printk(KERN_WARNING
7c832835 2377 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2378 return IO_ERROR;
1da177e4
LT		 2379 }
2380 } else if (cmd_type == TYPE_MSG) {
2381 switch (cmd) {
7c832835 2382 case 0: /* ABORT message */
3da8b713 2383 c->Request.CDBLen = 12;
2384 c->Request.Type.Attribute = ATTR_SIMPLE;
2385 c->Request.Type.Direction = XFER_WRITE;
2386 c->Request.Timeout = 0;
7c832835
BH		 2387 c->Request.CDB[0] = cmd; /* abort */
2388 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2389 /* buff contains the tag of the command to abort */
2390 memcpy(&c->Request.CDB[4], buff, 8);
2391 break;
7c832835 2392 case 1: /* RESET message */
88f627ae 2393 c->Request.CDBLen = 16;
3da8b713 2394 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2395 c->Request.Type.Direction = XFER_NONE;
3da8b713 2396 c->Request.Timeout = 0;
2397 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2398 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2399 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2400 break;
1da177e4
LT		 2401 case 3: /* No-Op message */
2402 c->Request.CDBLen = 1;
2403 c->Request.Type.Attribute = ATTR_SIMPLE;
2404 c->Request.Type.Direction = XFER_WRITE;
2405 c->Request.Timeout = 0;
2406 c->Request.CDB[0] = cmd;
2407 break;
2408 default:
2409 printk(KERN_WARNING
7c832835 2410 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2411 return IO_ERROR;
2412 }
2413 } else {
2414 printk(KERN_WARNING
7c832835 2415 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2416 return IO_ERROR;
2417 }
2418 /* Fill in the scatter gather information */
2419 if (size > 0) {
2420 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2421 buff, size,
2422 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2423 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2424 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2425 c->SG[0].Len = size;
7c832835 2426 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2427 }
2428 return status;
2429}
7c832835 2430
3c2ab402 2431static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2432{
2433 switch (c->err_info->ScsiStatus) {
2434 case SAM_STAT_GOOD:
2435 return IO_OK;
2436 case SAM_STAT_CHECK_CONDITION:
2437 switch (0xf & c->err_info->SenseInfo[2]) {
2438 case 0: return IO_OK; /* no sense */
2439 case 1: return IO_OK; /* recovered error */
2440 default:
2441 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2442 "check condition, sense key = 0x%02x\n",
2443 h->ctlr, c->Request.CDB[0],
2444 c->err_info->SenseInfo[2]);
2445 }
2446 break;
2447 default:
2448 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2449 "scsi status = 0x%02x\n", h->ctlr,
2450 c->Request.CDB[0], c->err_info->ScsiStatus);
2451 break;
2452 }
2453 return IO_ERROR;
2454}
2455
789a424a 2456static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2457{
5390cfc3 2458 int return_status = IO_OK;
7c832835 2459
789a424a 2460 if (c->err_info->CommandStatus == CMD_SUCCESS)
2461 return IO_OK;
5390cfc3 2462
2463 switch (c->err_info->CommandStatus) {
2464 case CMD_TARGET_STATUS:
3c2ab402 2465 return_status = check_target_status(h, c);
5390cfc3 2466 break;
2467 case CMD_DATA_UNDERRUN:
2468 case CMD_DATA_OVERRUN:
2469 /* expected for inquiry and report lun commands */
2470 break;
2471 case CMD_INVALID:
789a424a 2472 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2473 "reported invalid\n", c->Request.CDB[0]);
2474 return_status = IO_ERROR;
2475 break;
2476 case CMD_PROTOCOL_ERR:
2477 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2478 "protocol error \n", c->Request.CDB[0]);
2479 return_status = IO_ERROR;
2480 break;
2481 case CMD_HARDWARE_ERR:
2482 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2483 " hardware error\n", c->Request.CDB[0]);
2484 return_status = IO_ERROR;
2485 break;
2486 case CMD_CONNECTION_LOST:
2487 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2488 "connection lost\n", c->Request.CDB[0]);
2489 return_status = IO_ERROR;
2490 break;
2491 case CMD_ABORTED:
2492 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2493 "aborted\n", c->Request.CDB[0]);
2494 return_status = IO_ERROR;
2495 break;
2496 case CMD_ABORT_FAILED:
2497 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2498 "abort failed\n", c->Request.CDB[0]);
2499 return_status = IO_ERROR;
2500 break;
2501 case CMD_UNSOLICITED_ABORT:
2502 printk(KERN_WARNING
2503 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2504 c->Request.CDB[0]);
789a424a 2505 return_status = IO_NEEDS_RETRY;
5390cfc3 2506 break;
2507 default:
2508 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2509 "unknown status %x\n", c->Request.CDB[0],
2510 c->err_info->CommandStatus);
2511 return_status = IO_ERROR;
7c832835 2512 }
789a424a 2513 return return_status;
2514}
2515
2516static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2517 int attempt_retry)
2518{
2519 DECLARE_COMPLETION_ONSTACK(wait);
2520 u64bit buff_dma_handle;
2521 unsigned long flags;
2522 int return_status = IO_OK;
2523
2524resend_cmd2:
2525 c->waiting = &wait;
2526 /* Put the request on the tail of the queue and send it */
2527 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2528 addQ(&h->reqQ, c);
2529 h->Qdepth++;
2530 start_io(h);
2531 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2532
2533 wait_for_completion(&wait);
2534
2535 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2536 goto command_done;
2537
2538 return_status = process_sendcmd_error(h, c);
2539
2540 if (return_status == IO_NEEDS_RETRY &&
2541 c->retry_count < MAX_CMD_RETRIES) {
2542 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2543 c->Request.CDB[0]);
2544 c->retry_count++;
2545 /* erase the old error information */
2546 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2547 return_status = IO_OK;
2548 INIT_COMPLETION(wait);
2549 goto resend_cmd2;
2550 }
5390cfc3 2551
2552command_done:
1da177e4 2553 /* unlock the buffers from DMA */
bb2a37bf
MM		 2554 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2555 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2556 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2557 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2558 return return_status;
2559}
2560
b57695fe 2561static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2562 __u8 page_code, unsigned char scsi3addr[],
2563 int cmd_type)
5390cfc3 2564{
2565 ctlr_info_t *h = hba[ctlr];
2566 CommandList_struct *c;
2567 int return_status;
2568
2569 c = cmd_alloc(h, 0);
2570 if (!c)
2571 return -ENOMEM;
b57695fe 2572 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2573 scsi3addr, cmd_type);
5390cfc3 2574 if (return_status == IO_OK)
789a424a 2575 return_status = sendcmd_withirq_core(h, c, 1);
2576
1da177e4 2577 cmd_free(h, c, 0);
7c832835 2578 return return_status;
1da177e4 2579}
7c832835 2580
1da177e4 2581static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2582 int withirq, sector_t total_size,
7c832835
BH		 2583 unsigned int block_size,
2584 InquiryData_struct *inq_buff,
2585 drive_info_struct *drv)
1da177e4
LT		 2586{
2587 int return_code;
00988a35 2588 unsigned long t;
b57695fe 2589 unsigned char scsi3addr[8];
00988a35 2590
1da177e4 2591 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2592 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2593 if (withirq)
2594 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2595 inq_buff, sizeof(*inq_buff),
2596 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2597 else
2598 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2599 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2600 TYPE_CMD);
1da177e4 2601 if (return_code == IO_OK) {
7c832835 2602 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2603 printk(KERN_WARNING
7c832835
BH		 2604 "cciss: reading geometry failed, volume "
2605 "does not support reading geometry\n");
1da177e4 2606 drv->heads = 255;
7c832835 2607 drv->sectors = 32; // Sectors per track
7f42d3b8 2608 drv->cylinders = total_size + 1;
89f97ad1 2609 drv->raid_level = RAID_UNKNOWN;
1da177e4 2610 } else {
1da177e4
LT		 2611 drv->heads = inq_buff->data_byte[6];
2612 drv->sectors = inq_buff->data_byte[7];
2613 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2614 drv->cylinders += inq_buff->data_byte[5];
2615 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2616 }
2617 drv->block_size = block_size;
97c06978 2618 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2619 t = drv->heads * drv->sectors;
2620 if (t > 1) {
97c06978
MMOD		 2621 sector_t real_size = total_size + 1;
2622 unsigned long rem = sector_div(real_size, t);
3f7705ea 2623 if (rem)
97c06978
MMOD		 2624 real_size++;
2625 drv->cylinders = real_size;
1da177e4 2626 }
7c832835 2627 } else { /* Get geometry failed */
1da177e4
LT		 2628 printk(KERN_WARNING "cciss: reading geometry failed\n");
2629 }
1da177e4 2630}
7c832835 2631
1da177e4 2632static void
00988a35 2633cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2634 unsigned int *block_size)
1da177e4 2635{
00988a35 2636 ReadCapdata_struct *buf;
1da177e4 2637 int return_code;
b57695fe 2638 unsigned char scsi3addr[8];
1aebe187
MK		 2639
2640 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2641 if (!buf) {
00988a35
MMOD		 2642 printk(KERN_WARNING "cciss: out of memory\n");
2643 return;
2644 }
1aebe187 2645
b57695fe 2646 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2647 if (withirq)
2648 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2649 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2650 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2651 else
2652 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2653 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2654 0, scsi3addr, TYPE_CMD);
1da177e4 2655 if (return_code == IO_OK) {
4c1f2b31
AV		 2656 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2657 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2658 } else { /* read capacity command failed */
1da177e4
LT		 2659 printk(KERN_WARNING "cciss: read capacity failed\n");
2660 *total_size = 0;
2661 *block_size = BLOCK_SIZE;
2662 }
00988a35 2663 kfree(buf);
00988a35
MMOD		 2664}
2665
2666static void
2667cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2668{
2669 ReadCapdata_struct_16 *buf;
2670 int return_code;
b57695fe 2671 unsigned char scsi3addr[8];
1aebe187
MK		 2672
2673 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2674 if (!buf) {
00988a35
MMOD		 2675 printk(KERN_WARNING "cciss: out of memory\n");
2676 return;
2677 }
1aebe187 2678
b57695fe 2679 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2680 if (withirq) {
2681 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2682 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2683 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2684 }
2685 else {
2686 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2687 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2688 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2689 }
2690 if (return_code == IO_OK) {
4c1f2b31
AV		 2691 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2692 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2693 } else { /* read capacity command failed */
2694 printk(KERN_WARNING "cciss: read capacity failed\n");
2695 *total_size = 0;
2696 *block_size = BLOCK_SIZE;
2697 }
7b92aadf 2698 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2699 (unsigned long long)*total_size+1, *block_size);
00988a35 2700 kfree(buf);
1da177e4
LT		 2701}
2702
1da177e4
LT		 2703static int cciss_revalidate(struct gendisk *disk)
2704{
2705 ctlr_info_t *h = get_host(disk);
2706 drive_info_struct *drv = get_drv(disk);
2707 int logvol;
7c832835 2708 int FOUND = 0;
1da177e4 2709 unsigned int block_size;
00988a35 2710 sector_t total_size;
1da177e4
LT		 2711 InquiryData_struct *inq_buff = NULL;
2712
7c832835 2713 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
39ccf9a6
SC		 2714 if (memcmp(h->drv[logvol].LunID, drv->LunID,
2715 sizeof(drv->LunID)) == 0) {
7c832835 2716 FOUND = 1;
1da177e4
LT		 2717 break;
2718 }
2719 }
2720
7c832835
BH		 2721 if (!FOUND)
2722 return 1;
1da177e4 2723
7c832835
BH		 2724 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2725 if (inq_buff == NULL) {
2726 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2727 return 1;
2728 }
00988a35
MMOD		 2729 if (h->cciss_read == CCISS_READ_10) {
2730 cciss_read_capacity(h->ctlr, logvol, 1,
2731 &total_size, &block_size);
2732 } else {
2733 cciss_read_capacity_16(h->ctlr, logvol, 1,
2734 &total_size, &block_size);
2735 }
7c832835
BH		 2736 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2737 inq_buff, drv);
1da177e4 2738
e1defc4f 2739 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2740 set_capacity(disk, drv->nr_blocks);
2741
1da177e4
LT		 2742 kfree(inq_buff);
2743 return 0;
2744}
2745
2746/*
2747 * Wait polling for a command to complete.
2748 * The memory mapped FIFO is polled for the completion.
2749 * Used only at init time, interrupts from the HBA are disabled.
2750 */
2751static unsigned long pollcomplete(int ctlr)
2752{
2753 unsigned long done;
2754 int i;
2755
2756 /* Wait (up to 20 seconds) for a command to complete */
2757
2758 for (i = 20 * HZ; i > 0; i--) {
2759 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2760 if (done == FIFO_EMPTY)
2761 schedule_timeout_uninterruptible(1);
2762 else
e2019b58 2763 return done;
1da177e4
LT		 2764 }
2765 /* Invalid address to tell caller we ran out of time */
2766 return 1;
2767}
3da8b713 2768
4a4b2d76
SC		 2769/* Send command c to controller h and poll for it to complete.
2770 * Turns interrupts off on the board. Used at driver init time
2771 * and during SCSI error recovery.
1da177e4 2772 */
4a4b2d76 2773static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2774{
1da177e4
LT		 2775 int i;
2776 unsigned long complete;
4a4b2d76 2777 int status = IO_ERROR;
1da177e4 2778 u64bit buff_dma_handle;
1da177e4 2779
4a4b2d76
SC		 2780resend_cmd1:
2781
2782 /* Disable interrupt on the board. */
2783 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2784
1da177e4 2785 /* Make sure there is room in the command FIFO */
7c832835 2786 /* Actually it should be completely empty at this time */
3da8b713 2787 /* unless we are in here doing error handling for the scsi */
2788 /* tape side of the driver. */
7c832835 2789 for (i = 200000; i > 0; i--) {
1da177e4 2790 /* if fifo isn't full go */
4a4b2d76 2791 if (!(h->access.fifo_full(h)))
7c832835 2792 break;
7c832835
BH		 2793 udelay(10);
2794 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2795 " waiting!\n", h->ctlr);
7c832835 2796 }
4a4b2d76 2797 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2798 do {
4a4b2d76 2799 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2800
2801#ifdef CCISS_DEBUG
3da8b713 2802 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2803#endif /* CCISS_DEBUG */
1da177e4 2804
3da8b713 2805 if (complete == 1) {
7c832835
BH		 2806 printk(KERN_WARNING
2807 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2808 "No command list address returned!\n", h->ctlr);
3da8b713 2809 status = IO_ERROR;
3da8b713 2810 break;
2811 }
2812
72f9f132 2813 /* Make sure it's the command we're expecting. */
4a4b2d76 2814 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2815 printk(KERN_WARNING "cciss%d: Unexpected command "
2816 "completion.\n", h->ctlr);
4a4b2d76
SC		 2817 continue;
2818 }
2819
2820 /* It is our command. If no error, we're done. */
2821 if (!(complete & CISS_ERROR_BIT)) {
2822 status = IO_OK;
2823 break;
2824 }
2825
2826 /* There is an error... */
2827
2828 /* if data overrun or underun on Report command ignore it */
2829 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2830 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2831 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2832 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2833 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2834 complete = c->busaddr;
2835 status = IO_OK;
2836 break;
1da177e4 2837 }
4a4b2d76
SC		 2838
2839 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2840 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2841 h->ctlr, c);
2842 if (c->retry_count < MAX_CMD_RETRIES) {
2843 printk(KERN_WARNING "cciss%d: retrying %p\n",
2844 h->ctlr, c);
2845 c->retry_count++;
2846 /* erase the old error information */
2847 memset(c->err_info, 0, sizeof(c->err_info));
2848 goto resend_cmd1;
3da8b713 2849 }
4a4b2d76
SC		 2850 printk(KERN_WARNING "cciss%d: retried %p too many "
2851 "times\n", h->ctlr, c);
2852 status = IO_ERROR;
3c2ab402 2853 break;
4a4b2d76
SC		 2854 }
2855
2856 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2857 printk(KERN_WARNING "cciss%d: command could not be "
2858 "aborted.\n", h->ctlr);
2859 status = IO_ERROR;
3c2ab402 2860 break;
4a4b2d76
SC		 2861 }
2862
4a4b2d76 2863 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2864 status = check_target_status(h, c);
2865 break;
4a4b2d76
SC		 2866 }
2867
3c2ab402 2868 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2869 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2870 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2871 status = IO_ERROR;
3c2ab402 2872 break;
4a4b2d76
SC		 2873
2874 } while (1);
7c832835 2875
1da177e4 2876 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2877 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2878 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2879 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2880 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2881 return status;
2882}
2883
2884/*
2885 * Send a command to the controller, and wait for it to complete.
2886 * Used at init time, and during SCSI error recovery.
2887 */
2888static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2889 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2890{
2891 CommandList_struct *c;
2892 int status;
2893
2894 c = cmd_alloc(hba[ctlr], 1);
2895 if (!c) {
2896 printk(KERN_WARNING "cciss: unable to get memory");
2897 return IO_ERROR;
2898 }
b57695fe 2899 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2900 scsi3addr, cmd_type);
4a4b2d76
SC		 2901 if (status == IO_OK)
2902 status = sendcmd_core(hba[ctlr], c);
2903 cmd_free(hba[ctlr], c, 1);
e2019b58 2904 return status;
7c832835
BH		 2905}
2906
1da177e4
LT		 2907/*
2908 * Map (physical) PCI mem into (virtual) kernel space
2909 */
2910static void __iomem *remap_pci_mem(ulong base, ulong size)
2911{
7c832835
BH		 2912 ulong page_base = ((ulong) base) & PAGE_MASK;
2913 ulong page_offs = ((ulong) base) - page_base;
2914 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2915
7c832835 2916 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2917}
2918
7c832835
BH		 2919/*
2920 * Takes jobs of the Q and sends them to the hardware, then puts it on
2921 * the Q to wait for completion.
2922 */
2923static void start_io(ctlr_info_t *h)
1da177e4
LT		 2924{
2925 CommandList_struct *c;
7c832835 2926
8a3173de
JA		 2927 while (!hlist_empty(&h->reqQ)) {
2928 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2929 /* can't do anything if fifo is full */
2930 if ((h->access.fifo_full(h))) {
2931 printk(KERN_WARNING "cciss: fifo full\n");
2932 break;
2933 }
2934
7c832835 2935 /* Get the first entry from the Request Q */
8a3173de 2936 removeQ(c);
1da177e4 2937 h->Qdepth--;
7c832835
BH		 2938
2939 /* Tell the controller execute command */
1da177e4 2940 h->access.submit_command(h, c);
7c832835
BH		 2941
2942 /* Put job onto the completed Q */
8a3173de 2943 addQ(&h->cmpQ, c);
1da177e4
LT		 2944 }
2945}
7c832835 2946
1da177e4
LT		 2947/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2948/* Zeros out the error record and then resends the command back */
2949/* to the controller */
7c832835 2950static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2951{
2952 /* erase the old error information */
2953 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2954
2955 /* add it to software queue and then send it to the controller */
8a3173de 2956 addQ(&h->reqQ, c);
1da177e4 2957 h->Qdepth++;
7c832835 2958 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2959 h->maxQsinceinit = h->Qdepth;
2960
2961 start_io(h);
2962}
a9925a06 2963
1a614f50
SC		 2964static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2965 unsigned int msg_byte, unsigned int host_byte,
2966 unsigned int driver_byte)
2967{
2968 /* inverse of macros in scsi.h */
2969 return (scsi_status_byte & 0xff) |
2970 ((msg_byte & 0xff) << 8) |
2971 ((host_byte & 0xff) << 16) |
2972 ((driver_byte & 0xff) << 24);
2973}
2974
0a9279cc
MM		 2975static inline int evaluate_target_status(ctlr_info_t *h,
2976 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2977{
2978 unsigned char sense_key;
1a614f50
SC		 2979 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2980 int error_value;
2981
0a9279cc 2982 *retry_cmd = 0;
1a614f50
SC		 2983 /* If we get in here, it means we got "target status", that is, scsi status */
2984 status_byte = cmd->err_info->ScsiStatus;
2985 driver_byte = DRIVER_OK;
2986 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2987
2988 if (blk_pc_request(cmd->rq))
2989 host_byte = DID_PASSTHROUGH;
2990 else
2991 host_byte = DID_OK;
2992
2993 error_value = make_status_bytes(status_byte, msg_byte,
2994 host_byte, driver_byte);
03bbfee5 2995
1a614f50 2996 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2997 if (!blk_pc_request(cmd->rq))
2998 printk(KERN_WARNING "cciss: cmd %p "
2999 "has SCSI Status 0x%x\n",
3000 cmd, cmd->err_info->ScsiStatus);
1a614f50 3001 return error_value;
03bbfee5
MMOD		 3002 }
3003
3004 /* check the sense key */
3005 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3006 /* no status or recovered error */
1a614f50
SC		 3007 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
3008 error_value = 0;
03bbfee5 3009
0a9279cc
MM		 3010 if (check_for_unit_attention(h, cmd)) {
3011 *retry_cmd = !blk_pc_request(cmd->rq);
3012 return 0;
3013 }
3014
03bbfee5 3015 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 3016 if (error_value != 0)
03bbfee5
MMOD		 3017 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3018 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3019 return error_value;
03bbfee5
MMOD		 3020 }
3021
3022 /* SG_IO or similar, copy sense data back */
3023 if (cmd->rq->sense) {
3024 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3025 cmd->rq->sense_len = cmd->err_info->SenseLen;
3026 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3027 cmd->rq->sense_len);
3028 } else
3029 cmd->rq->sense_len = 0;
3030
1a614f50 3031 return error_value;
03bbfee5
MMOD		 3032}
3033
7c832835 3034/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3035 * buffers for the completed job. Note that this function does not need
3036 * to hold the hba/queue lock.
7c832835
BH		 3037 */
3038static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3039 int timeout)
1da177e4 3040{
1da177e4 3041 int retry_cmd = 0;
198b7660
MMOD		 3042 struct request *rq = cmd->rq;
3043
3044 rq->errors = 0;
7c832835 3045
1da177e4 3046 if (timeout)
1a614f50 3047 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3048
d38ae168
MMOD		 3049 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3050 goto after_error_processing;
7c832835 3051
d38ae168 3052 switch (cmd->err_info->CommandStatus) {
d38ae168 3053 case CMD_TARGET_STATUS:
0a9279cc 3054 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3055 break;
3056 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3057 if (blk_fs_request(cmd->rq)) {
3058 printk(KERN_WARNING "cciss: cmd %p has"
3059 " completed with data underrun "
3060 "reported\n", cmd);
c3a4d78c 3061 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3062 }
d38ae168
MMOD		 3063 break;
3064 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3065 if (blk_fs_request(cmd->rq))
3066 printk(KERN_WARNING "cciss: cmd %p has"
3067 " completed with data overrun "
3068 "reported\n", cmd);
d38ae168
MMOD		 3069 break;
3070 case CMD_INVALID:
3071 printk(KERN_WARNING "cciss: cmd %p is "
3072 "reported invalid\n", cmd);
1a614f50
SC		 3073 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3074 cmd->err_info->CommandStatus, DRIVER_OK,
3075 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3076 break;
3077 case CMD_PROTOCOL_ERR:
3078 printk(KERN_WARNING "cciss: cmd %p has "
3079 "protocol error \n", cmd);
1a614f50
SC		 3080 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3081 cmd->err_info->CommandStatus, DRIVER_OK,
3082 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3083 break;
3084 case CMD_HARDWARE_ERR:
3085 printk(KERN_WARNING "cciss: cmd %p had "
3086 " hardware error\n", cmd);
1a614f50
SC		 3087 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3088 cmd->err_info->CommandStatus, DRIVER_OK,
3089 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3090 break;
3091 case CMD_CONNECTION_LOST:
3092 printk(KERN_WARNING "cciss: cmd %p had "
3093 "connection lost\n", cmd);
1a614f50
SC		 3094 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3095 cmd->err_info->CommandStatus, DRIVER_OK,
3096 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3097 break;
3098 case CMD_ABORTED:
3099 printk(KERN_WARNING "cciss: cmd %p was "
3100 "aborted\n", cmd);
1a614f50
SC		 3101 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3102 cmd->err_info->CommandStatus, DRIVER_OK,
3103 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3104 break;
3105 case CMD_ABORT_FAILED:
3106 printk(KERN_WARNING "cciss: cmd %p reports "
3107 "abort failed\n", cmd);
1a614f50
SC		 3108 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3109 cmd->err_info->CommandStatus, DRIVER_OK,
3110 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3111 break;
3112 case CMD_UNSOLICITED_ABORT:
3113 printk(KERN_WARNING "cciss%d: unsolicited "
3114 "abort %p\n", h->ctlr, cmd);
3115 if (cmd->retry_count < MAX_CMD_RETRIES) {
3116 retry_cmd = 1;
3117 printk(KERN_WARNING
3118 "cciss%d: retrying %p\n", h->ctlr, cmd);
3119 cmd->retry_count++;
3120 } else
3121 printk(KERN_WARNING
3122 "cciss%d: %p retried too "
3123 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3124 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3125 cmd->err_info->CommandStatus, DRIVER_OK,
3126 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3127 break;
3128 case CMD_TIMEOUT:
3129 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3130 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3131 cmd->err_info->CommandStatus, DRIVER_OK,
3132 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3133 break;
3134 default:
3135 printk(KERN_WARNING "cciss: cmd %p returned "
3136 "unknown status %x\n", cmd,
3137 cmd->err_info->CommandStatus);
1a614f50
SC		 3138 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3139 cmd->err_info->CommandStatus, DRIVER_OK,
3140 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3141 }
d38ae168
MMOD		 3142
3143after_error_processing:
3144
1da177e4 3145 /* We need to return this command */
7c832835
BH		 3146 if (retry_cmd) {
3147 resend_cciss_cmd(h, cmd);
1da177e4 3148 return;
7c832835 3149 }
03bbfee5 3150 cmd->rq->completion_data = cmd;
a9925a06 3151 blk_complete_request(cmd->rq);
1da177e4
LT		 3152}
3153
7c832835
BH		 3154/*
3155 * Get a request and submit it to the controller.
1da177e4 3156 */
165125e1 3157static void do_cciss_request(struct request_queue *q)
1da177e4 3158{
7c832835 3159 ctlr_info_t *h = q->queuedata;
1da177e4 3160 CommandList_struct *c;
00988a35
MMOD		 3161 sector_t start_blk;
3162 int seg;
1da177e4
LT		 3163 struct request *creq;
3164 u64bit temp64;
3165 struct scatterlist tmp_sg[MAXSGENTRIES];
3166 drive_info_struct *drv;
3167 int i, dir;
3168
3169 /* We call start_io here in case there is a command waiting on the
3170 * queue that has not been sent.
7c832835 3171 */
1da177e4
LT		 3172 if (blk_queue_plugged(q))
3173 goto startio;
3174
7c832835 3175 queue:
9934c8c0 3176 creq = blk_peek_request(q);
1da177e4
LT		 3177 if (!creq)
3178 goto startio;
3179
089fe1b2 3180 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3181
7c832835 3182 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3183 goto full;
3184
9934c8c0 3185 blk_start_request(creq);
1da177e4
LT		 3186
3187 spin_unlock_irq(q->queue_lock);
3188
3189 c->cmd_type = CMD_RWREQ;
3190 c->rq = creq;
7c832835
BH		 3191
3192 /* fill in the request */
1da177e4 3193 drv = creq->rq_disk->private_data;
7c832835 3194 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3195 /* got command from pool, so use the command block index instead */
3196 /* for direct lookups. */
3197 /* The first 2 bits are reserved for controller error reporting. */
3198 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3199 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3200 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
7c832835
BH		 3201 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3202 c->Request.Type.Type = TYPE_CMD; // It is a command.
3203 c->Request.Type.Attribute = ATTR_SIMPLE;
3204 c->Request.Type.Direction =
a52de245 3205 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3206 c->Request.Timeout = 0; // Don't time out
3207 c->Request.CDB[0] =
00988a35 3208 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3209 start_blk = blk_rq_pos(creq);
1da177e4 3210#ifdef CCISS_DEBUG
83096ebf
TH		 3211 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3212 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3213#endif /* CCISS_DEBUG */
1da177e4 3214
45711f1a 3215 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3216 seg = blk_rq_map_sg(q, creq, tmp_sg);
3217
7c832835 3218 /* get the DMA records for the setup */
1da177e4
LT		 3219 if (c->Request.Type.Direction == XFER_READ)
3220 dir = PCI_DMA_FROMDEVICE;
3221 else
3222 dir = PCI_DMA_TODEVICE;
3223
7c832835 3224 for (i = 0; i < seg; i++) {
1da177e4 3225 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3226 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3227 tmp_sg[i].offset,
3228 tmp_sg[i].length, dir);
1da177e4 3229 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3230 c->SG[i].Addr.upper = temp64.val32.upper;
3231 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3232 }
7c832835
BH		 3233 /* track how many SG entries we are using */
3234 if (seg > h->maxSG)
3235 h->maxSG = seg;
1da177e4
LT		 3236
3237#ifdef CCISS_DEBUG
83096ebf
TH		 3238 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3239 blk_rq_sectors(creq), seg);
7c832835 3240#endif /* CCISS_DEBUG */
1da177e4
LT		 3241
3242 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3243 if (likely(blk_fs_request(creq))) {
3244 if(h->cciss_read == CCISS_READ_10) {
3245 c->Request.CDB[1] = 0;
3246 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3247 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3248 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3249 c->Request.CDB[5] = start_blk & 0xff;
3250 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3251 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3252 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3253 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3254 } else {
582539e5
RD		 3255 u32 upper32 = upper_32_bits(start_blk);
3256
03bbfee5
MMOD		 3257 c->Request.CDBLen = 16;
3258 c->Request.CDB[1]= 0;
582539e5
RD		 3259 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3260 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3261 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3262 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3263 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3264 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3265 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3266 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3267 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3268 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3269 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3270 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3271 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3272 }
3273 } else if (blk_pc_request(creq)) {
3274 c->Request.CDBLen = creq->cmd_len;
3275 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3276 } else {
03bbfee5
MMOD		 3277 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3278 BUG();
00988a35 3279 }
1da177e4
LT		 3280
3281 spin_lock_irq(q->queue_lock);
3282
8a3173de 3283 addQ(&h->reqQ, c);
1da177e4 3284 h->Qdepth++;
7c832835
BH		 3285 if (h->Qdepth > h->maxQsinceinit)
3286 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3287
3288 goto queue;
00988a35 3289full:
1da177e4 3290 blk_stop_queue(q);
00988a35 3291startio:
1da177e4
LT		 3292 /* We will already have the driver lock here so not need
3293 * to lock it.
7c832835 3294 */
1da177e4
LT		 3295 start_io(h);
3296}
3297
3da8b713 3298static inline unsigned long get_next_completion(ctlr_info_t *h)
3299{
3da8b713 3300 return h->access.command_completed(h);
3da8b713 3301}
3302
3303static inline int interrupt_pending(ctlr_info_t *h)
3304{
3da8b713 3305 return h->access.intr_pending(h);
3da8b713 3306}
3307
3308static inline long interrupt_not_for_us(ctlr_info_t *h)
3309{
7c832835 3310 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3311 (h->interrupts_enabled == 0)));
3da8b713 3312}
3313
7d12e780 3314static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3315{
3316 ctlr_info_t *h = dev_id;
3317 CommandList_struct *c;
3318 unsigned long flags;
33079b21 3319 __u32 a, a1, a2;
1da177e4 3320
3da8b713 3321 if (interrupt_not_for_us(h))
1da177e4 3322 return IRQ_NONE;
1da177e4
LT		 3323 /*
3324 * If there are completed commands in the completion queue,
3325 * we had better do something about it.
3326 */
3327 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3328 while (interrupt_pending(h)) {
7c832835 3329 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3330 a1 = a;
33079b21
MM		 3331 if ((a & 0x04)) {
3332 a2 = (a >> 3);
f880632f 3333 if (a2 >= h->nr_cmds) {
7c832835
BH		 3334 printk(KERN_WARNING
3335 "cciss: controller cciss%d failed, stopping.\n",
3336 h->ctlr);
33079b21
MM		 3337 fail_all_cmds(h->ctlr);
3338 return IRQ_HANDLED;
3339 }
3340
3341 c = h->cmd_pool + a2;
3342 a = c->busaddr;
3343
3344 } else {
8a3173de
JA		 3345 struct hlist_node *tmp;
3346
7c832835 3347 a &= ~3;
8a3173de
JA		 3348 c = NULL;
3349 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3350 if (c->busaddr == a)
7c832835
BH		 3351 break;
3352 }
33079b21 3353 }
1da177e4
LT		 3354 /*
3355 * If we've found the command, take it off the
3356 * completion Q and free it
3357 */
8a3173de
JA		 3358 if (c && c->busaddr == a) {
3359 removeQ(c);
1da177e4
LT		 3360 if (c->cmd_type == CMD_RWREQ) {
3361 complete_command(h, c, 0);
3362 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3363 complete(c->waiting);
3364 }
3365# ifdef CONFIG_CISS_SCSI_TAPE
3366 else if (c->cmd_type == CMD_SCSI)
3367 complete_scsi_command(c, 0, a1);
3368# endif
3369 continue;
3370 }
3371 }
3372 }
3373
1da177e4
LT		 3374 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3375 return IRQ_HANDLED;
3376}
7c832835 3377
b368c9dd
AP		 3378/**
3379 * add_to_scan_list() - add controller to rescan queue
3380 * @h: Pointer to the controller.
3381 *
3382 * Adds the controller to the rescan queue if not already on the queue.
3383 *
3384 * returns 1 if added to the queue, 0 if skipped (could be on the
3385 * queue already, or the controller could be initializing or shutting
3386 * down).
3387 **/
3388static int add_to_scan_list(struct ctlr_info *h)
3389{
3390 struct ctlr_info *test_h;
3391 int found = 0;
3392 int ret = 0;
3393
3394 if (h->busy_initializing)
3395 return 0;
3396
3397 if (!mutex_trylock(&h->busy_shutting_down))
3398 return 0;
3399
3400 mutex_lock(&scan_mutex);
3401 list_for_each_entry(test_h, &scan_q, scan_list) {
3402 if (test_h == h) {
3403 found = 1;
3404 break;
3405 }
3406 }
3407 if (!found && !h->busy_scanning) {
3408 INIT_COMPLETION(h->scan_wait);
3409 list_add_tail(&h->scan_list, &scan_q);
3410 ret = 1;
3411 }
3412 mutex_unlock(&scan_mutex);
3413 mutex_unlock(&h->busy_shutting_down);
3414
3415 return ret;
3416}
3417
3418/**
3419 * remove_from_scan_list() - remove controller from rescan queue
3420 * @h: Pointer to the controller.
3421 *
3422 * Removes the controller from the rescan queue if present. Blocks if
3423 * the controller is currently conducting a rescan.
3424 **/
3425static void remove_from_scan_list(struct ctlr_info *h)
3426{
3427 struct ctlr_info *test_h, *tmp_h;
3428 int scanning = 0;
3429
3430 mutex_lock(&scan_mutex);
3431 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3432 if (test_h == h) {
3433 list_del(&h->scan_list);
3434 complete_all(&h->scan_wait);
3435 mutex_unlock(&scan_mutex);
3436 return;
3437 }
3438 }
3439 if (&h->busy_scanning)
3440 scanning = 0;
3441 mutex_unlock(&scan_mutex);
3442
3443 if (scanning)
3444 wait_for_completion(&h->scan_wait);
3445}
3446
3447/**
3448 * scan_thread() - kernel thread used to rescan controllers
3449 * @data: Ignored.
3450 *
3451 * A kernel thread used scan for drive topology changes on
3452 * controllers. The thread processes only one controller at a time
3453 * using a queue. Controllers are added to the queue using
3454 * add_to_scan_list() and removed from the queue either after done
3455 * processing or using remove_from_scan_list().
3456 *
3457 * returns 0.
3458 **/
0a9279cc
MM		 3459static int scan_thread(void *data)
3460{
b368c9dd 3461 struct ctlr_info *h;
0a9279cc 3462
b368c9dd
AP		 3463 while (1) {
3464 set_current_state(TASK_INTERRUPTIBLE);
3465 schedule();
0a9279cc
MM		 3466 if (kthread_should_stop())
3467 break;
b368c9dd
AP		 3468
3469 while (1) {
3470 mutex_lock(&scan_mutex);
3471 if (list_empty(&scan_q)) {
3472 mutex_unlock(&scan_mutex);
3473 break;
3474 }
3475
3476 h = list_entry(scan_q.next,
3477 struct ctlr_info,
3478 scan_list);
3479 list_del(&h->scan_list);
3480 h->busy_scanning = 1;
3481 mutex_unlock(&scan_mutex);
3482
3483 if (h) {
2d11d993 3484 rebuild_lun_table(h, 0, 0);
b368c9dd
AP		 3485 complete_all(&h->scan_wait);
3486 mutex_lock(&scan_mutex);
3487 h->busy_scanning = 0;
3488 mutex_unlock(&scan_mutex);
3489 }
3490 }
0a9279cc 3491 }
b368c9dd 3492
0a9279cc
MM		 3493 return 0;
3494}
3495
3496static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3497{
3498 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3499 return 0;
3500
3501 switch (c->err_info->SenseInfo[12]) {
3502 case STATE_CHANGED:
3503 printk(KERN_WARNING "cciss%d: a state change "
3504 "detected, command retried\n", h->ctlr);
3505 return 1;
3506 break;
3507 case LUN_FAILED:
3508 printk(KERN_WARNING "cciss%d: LUN failure "
3509 "detected, action required\n", h->ctlr);
3510 return 1;
3511 break;
3512 case REPORT_LUNS_CHANGED:
3513 printk(KERN_WARNING "cciss%d: report LUN data "
3514 "changed\n", h->ctlr);
b368c9dd
AP		 3515 add_to_scan_list(h);
3516 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3517 return 1;
3518 break;
3519 case POWER_OR_RESET:
3520 printk(KERN_WARNING "cciss%d: a power on "
3521 "or device reset detected\n", h->ctlr);
3522 return 1;
3523 break;
3524 case UNIT_ATTENTION_CLEARED:
3525 printk(KERN_WARNING "cciss%d: unit attention "
3526 "cleared by another initiator\n", h->ctlr);
3527 return 1;
3528 break;
3529 default:
3530 printk(KERN_WARNING "cciss%d: unknown "
3531 "unit attention detected\n", h->ctlr);
3532 return 1;
3533 }
3534}
3535
7c832835 3536/*
d14c4ab5 3537 * We cannot read the structure directly, for portability we must use
1da177e4 3538 * the io functions.
7c832835 3539 * This is for debug only.
1da177e4
LT		 3540 */
3541#ifdef CCISS_DEBUG
7c832835 3542static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3543{
3544 int i;
3545 char temp_name[17];
3546
3547 printk("Controller Configuration information\n");
3548 printk("------------------------------------\n");
7c832835 3549 for (i = 0; i < 4; i++)
1da177e4 3550 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3551 temp_name[4] = '\0';
3552 printk(" Signature = %s\n", temp_name);
1da177e4 3553 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3554 printk(" Transport methods supported = 0x%x\n",
3555 readl(&(tb->TransportSupport)));
3556 printk(" Transport methods active = 0x%x\n",
3557 readl(&(tb->TransportActive)));
3558 printk(" Requested transport Method = 0x%x\n",
3559 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3560 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3561 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3562 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3563 readl(&(tb->HostWrite.CoalIntCount)));
3564 printk(" Max outstanding commands = 0x%d\n",
3565 readl(&(tb->CmdsOutMax)));
3566 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3567 for (i = 0; i < 16; i++)
1da177e4
LT		 3568 temp_name[i] = readb(&(tb->ServerName[i]));
3569 temp_name[16] = '\0';
3570 printk(" Server Name = %s\n", temp_name);
7c832835 3571 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3572}
7c832835 3573#endif /* CCISS_DEBUG */
1da177e4 3574
7c832835 3575static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3576{
3577 int i, offset, mem_type, bar_type;
7c832835 3578 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3579 return 0;
3580 offset = 0;
7c832835
BH		 3581 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3582 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3583 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3584 offset += 4;
3585 else {
3586 mem_type = pci_resource_flags(pdev, i) &
7c832835 3587 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3588 switch (mem_type) {
7c832835
BH		 3589 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3590 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3591 offset += 4; /* 32 bit */
3592 break;
3593 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3594 offset += 8;
3595 break;
3596 default: /* reserved in PCI 2.2 */
3597 printk(KERN_WARNING
3598 "Base address is invalid\n");
3599 return -1;
1da177e4
LT		 3600 break;
3601 }
3602 }
7c832835
BH		 3603 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3604 return i + 1;
1da177e4
LT		 3605 }
3606 return -1;
3607}
3608
fb86a35b
MM		 3609/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3610 * controllers that are capable. If not, we use IO-APIC mode.
3611 */
3612
7c832835
BH		 3613static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3614 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3615{
3616#ifdef CONFIG_PCI_MSI
7c832835
BH		 3617 int err;
3618 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3619 {0, 2}, {0, 3}
3620 };
fb86a35b
MM		 3621
3622 /* Some boards advertise MSI but don't really support it */
3623 if ((board_id == 0x40700E11) ||
7c832835
BH		 3624 (board_id == 0x40800E11) ||
3625 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3626 goto default_int_mode;
3627
7c832835
BH		 3628 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3629 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3630 if (!err) {
3631 c->intr[0] = cciss_msix_entries[0].vector;
3632 c->intr[1] = cciss_msix_entries[1].vector;
3633 c->intr[2] = cciss_msix_entries[2].vector;
3634 c->intr[3] = cciss_msix_entries[3].vector;
3635 c->msix_vector = 1;
3636 return;
3637 }
3638 if (err > 0) {
3639 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3640 "available\n", err);
1ecb9c0f 3641 goto default_int_mode;
7c832835
BH		 3642 } else {
3643 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3644 err);
1ecb9c0f 3645 goto default_int_mode;
7c832835
BH		 3646 }
3647 }
3648 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3649 if (!pci_enable_msi(pdev)) {
7c832835 3650 c->msi_vector = 1;
7c832835
BH		 3651 } else {
3652 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3653 }
3654 }
1ecb9c0f 3655default_int_mode:
7c832835 3656#endif /* CONFIG_PCI_MSI */
fb86a35b 3657 /* if we get here we're going to use the default interrupt mode */
7c832835 3658 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3659 return;
3660}
3661
7d1fd970 3662static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3663{
3664 ushort subsystem_vendor_id, subsystem_device_id, command;
3665 __u32 board_id, scratchpad = 0;
3666 __u64 cfg_offset;
3667 __u32 cfg_base_addr;
3668 __u64 cfg_base_addr_index;
c33ac89b 3669 int i, err;
1da177e4
LT		 3670
3671 /* check to see if controller has been disabled */
3672 /* BEFORE trying to enable it */
7c832835
BH		 3673 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3674 if (!(command & 0x02)) {
3675 printk(KERN_WARNING
3676 "cciss: controller appears to be disabled\n");
c33ac89b 3677 return -ENODEV;
1da177e4
LT		 3678 }
3679
c33ac89b 3680 err = pci_enable_device(pdev);
7c832835 3681 if (err) {
1da177e4 3682 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3683 return err;
1da177e4 3684 }
1da177e4 3685
4e570309
BH		 3686 err = pci_request_regions(pdev, "cciss");
3687 if (err) {
3688 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3689 "aborting\n");
872225ca 3690 return err;
4e570309
BH		 3691 }
3692
1da177e4
LT		 3693 subsystem_vendor_id = pdev->subsystem_vendor;
3694 subsystem_device_id = pdev->subsystem_device;
3695 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3696 subsystem_vendor_id);
1da177e4 3697
1da177e4
LT		 3698#ifdef CCISS_DEBUG
3699 printk("command = %x\n", command);
3700 printk("irq = %x\n", pdev->irq);
3701 printk("board_id = %x\n", board_id);
7c832835 3702#endif /* CCISS_DEBUG */
1da177e4 3703
fb86a35b
MM		 3704/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3705 * else we use the IO-APIC interrupt assigned to us by system ROM.
3706 */
3707 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3708
e1438581
MM		 3709 /* find the memory BAR */
3710 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3711 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3712 break;
3713 }
3714 if (i == DEVICE_COUNT_RESOURCE) {
3715 printk(KERN_WARNING "cciss: No memory BAR found\n");
3716 err = -ENODEV;
3717 goto err_out_free_res;
3718 }
3719
3720 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3721 * already removed
3722 */
1da177e4 3723
1da177e4 3724#ifdef CCISS_DEBUG
9f92f471 3725 printk("address 0 = %lx\n", c->paddr);
7c832835 3726#endif /* CCISS_DEBUG */
a5b92873 3727 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3728
3729 /* Wait for the board to become ready. (PCI hotplug needs this.)
3730 * We poll for up to 120 secs, once per 100ms. */
7c832835 3731 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3732 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3733 if (scratchpad == CCISS_FIRMWARE_READY)
3734 break;
3735 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3736 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3737 }
3738 if (scratchpad != CCISS_FIRMWARE_READY) {
3739 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3740 err = -ENODEV;
4e570309 3741 goto err_out_free_res;
1da177e4
LT		 3742 }
3743
3744 /* get the address index number */
3745 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3746 cfg_base_addr &= (__u32) 0x0000ffff;
3747#ifdef CCISS_DEBUG
3748 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3749#endif /* CCISS_DEBUG */
3750 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3751#ifdef CCISS_DEBUG
9f92f471
RD		 3752 printk("cfg base address index = %llx\n",
3753 (unsigned long long)cfg_base_addr_index);
7c832835 3754#endif /* CCISS_DEBUG */
1da177e4
LT		 3755 if (cfg_base_addr_index == -1) {
3756 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3757 err = -ENODEV;
4e570309 3758 goto err_out_free_res;
1da177e4
LT		 3759 }
3760
3761 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3762#ifdef CCISS_DEBUG
9f92f471 3763 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3764#endif /* CCISS_DEBUG */
3765 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3766 cfg_base_addr_index) +
3767 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3768 c->board_id = board_id;
3769
3770#ifdef CCISS_DEBUG
945f390f 3771 print_cfg_table(c->cfgtable);
7c832835 3772#endif /* CCISS_DEBUG */
1da177e4 3773
49153998
MM		 3774 /* Some controllers support Zero Memory Raid (ZMR).
3775 * When configured in ZMR mode the number of supported
3776 * commands drops to 64. So instead of just setting an
3777 * arbitrary value we make the driver a little smarter.
3778 * We read the config table to tell us how many commands
3779 * are supported on the controller then subtract 4 to
3780 * leave a little room for ioctl calls.
3781 */
3782 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3783 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3784 if (board_id == products[i].board_id) {
3785 c->product_name = products[i].product_name;
3786 c->access = *(products[i].access);
49153998 3787 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3788 break;
3789 }
3790 }
7c832835
BH		 3791 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3792 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3793 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3794 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3795 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3796 err = -ENODEV;
4e570309 3797 goto err_out_free_res;
1da177e4 3798 }
4ff9a9a4
MM		 3799 /* We didn't find the controller in our list. We know the
3800 * signature is valid. If it's an HP device let's try to
3801 * bind to the device and fire it up. Otherwise we bail.
3802 */
3803 if (i == ARRAY_SIZE(products)) {
3804 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3805 c->product_name = products[i-1].product_name;
3806 c->access = *(products[i-1].access);
49153998 3807 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3808 printk(KERN_WARNING "cciss: This is an unknown "
3809 "Smart Array controller.\n"
3810 "cciss: Please update to the latest driver "
3811 "available from www.hp.com.\n");
3812 } else {
3813 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3814 " to access the Smart Array controller %08lx\n"
3815 , (unsigned long)board_id);
3816 err = -ENODEV;
3817 goto err_out_free_res;
3818 }
3819 }
1da177e4 3820#ifdef CONFIG_X86
7c832835
BH		 3821 {
3822 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3823 __u32 prefetch;
3824 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3825 prefetch |= 0x100;
3826 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3827 }
1da177e4
LT		 3828#endif
3829
8bf50f71
MMOD		 3830 /* Disabling DMA prefetch and refetch for the P600.
3831 * An ASIC bug may result in accesses to invalid memory addresses.
3832 * We've disabled prefetch for some time now. Testing with XEN
3833 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3834 */
3835 if(board_id == 0x3225103C) {
3836 __u32 dma_prefetch;
8bf50f71 3837 __u32 dma_refetch;
f92e2f5f
MM		 3838 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3839 dma_prefetch |= 0x8000;
3840 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3841 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3842 dma_refetch |= 0x1;
3843 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3844 }
3845
1da177e4
LT		 3846#ifdef CCISS_DEBUG
3847 printk("Trying to put board into Simple mode\n");
7c832835 3848#endif /* CCISS_DEBUG */
1da177e4 3849 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3850 /* Update the field, and then ring the doorbell */
3851 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3852 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3853
3854 /* under certain very rare conditions, this can take awhile.
3855 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3856 * as we enter this code.) */
7c832835 3857 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3858 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3859 break;
3860 /* delay and try again */
3861 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3862 schedule_timeout(msecs_to_jiffies(1));
7c832835 3863 }
1da177e4
LT		 3864
3865#ifdef CCISS_DEBUG
7c832835
BH		 3866 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3867 readl(c->vaddr + SA5_DOORBELL));
3868#endif /* CCISS_DEBUG */
1da177e4 3869#ifdef CCISS_DEBUG
7c832835
BH		 3870 print_cfg_table(c->cfgtable);
3871#endif /* CCISS_DEBUG */
1da177e4 3872
7c832835 3873 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3874 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3875 " simple mode\n");
c33ac89b 3876 err = -ENODEV;
4e570309 3877 goto err_out_free_res;
1da177e4
LT		 3878 }
3879 return 0;
3880
5faad620 3881err_out_free_res:
872225ca
MM		 3882 /*
3883 * Deliberately omit pci_disable_device(): it does something nasty to
3884 * Smart Array controllers that pci_enable_device does not undo
3885 */
4e570309 3886 pci_release_regions(pdev);
c33ac89b 3887 return err;
1da177e4
LT		 3888}
3889
6ae5ce8e
MM		 3890/* Function to find the first free pointer into our hba[] array
3891 * Returns -1 if no free entries are left.
7c832835 3892 */
1da177e4
LT		 3893static int alloc_cciss_hba(void)
3894{
799202cb 3895 int i;
1da177e4 3896
7c832835 3897 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3898 if (!hba[i]) {
3899 ctlr_info_t *p;
f2912a12 3900
06ff37ff 3901 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3902 if (!p)
3903 goto Enomem;
1da177e4
LT		 3904 hba[i] = p;
3905 return i;
3906 }
3907 }
3908 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3909 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3910 return -1;
3911Enomem:
1da177e4 3912 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3913 return -1;
3914}
3915
2c935593 3916static void free_hba(int n)
1da177e4 3917{
2c935593
SC		 3918 ctlr_info_t *h = hba[n];
3919 int i;
1da177e4 3920
2c935593
SC		 3921 hba[n] = NULL;
3922 for (i = 0; i < h->highest_lun + 1; i++)
3923 if (h->gendisk[i] != NULL)
3924 put_disk(h->gendisk[i]);
3925 kfree(h);
1da177e4
LT		 3926}
3927
82eb03cf
CC		 3928/* Send a message CDB to the firmware. */
3929static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3930{
3931 typedef struct {
3932 CommandListHeader_struct CommandHeader;
3933 RequestBlock_struct Request;
3934 ErrDescriptor_struct ErrorDescriptor;
3935 } Command;
3936 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3937 Command *cmd;
3938 dma_addr_t paddr64;
3939 uint32_t paddr32, tag;
3940 void __iomem *vaddr;
3941 int i, err;
3942
3943 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3944 if (vaddr == NULL)
3945 return -ENOMEM;
3946
3947 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3948 CCISS commands, so they must be allocated from the lower 4GiB of
3949 memory. */
e930438c 3950 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3951 if (err) {
3952 iounmap(vaddr);
3953 return -ENOMEM;
3954 }
3955
3956 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3957 if (cmd == NULL) {
3958 iounmap(vaddr);
3959 return -ENOMEM;
3960 }
3961
3962 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3963 although there's no guarantee, we assume that the address is at
3964 least 4-byte aligned (most likely, it's page-aligned). */
3965 paddr32 = paddr64;
3966
3967 cmd->CommandHeader.ReplyQueue = 0;
3968 cmd->CommandHeader.SGList = 0;
3969 cmd->CommandHeader.SGTotal = 0;
3970 cmd->CommandHeader.Tag.lower = paddr32;
3971 cmd->CommandHeader.Tag.upper = 0;
3972 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3973
3974 cmd->Request.CDBLen = 16;
3975 cmd->Request.Type.Type = TYPE_MSG;
3976 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3977 cmd->Request.Type.Direction = XFER_NONE;
3978 cmd->Request.Timeout = 0; /* Don't time out */
3979 cmd->Request.CDB[0] = opcode;
3980 cmd->Request.CDB[1] = type;
3981 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3982
3983 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3984 cmd->ErrorDescriptor.Addr.upper = 0;
3985 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3986
3987 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3988
3989 for (i = 0; i < 10; i++) {
3990 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3991 if ((tag & ~3) == paddr32)
3992 break;
3993 schedule_timeout_uninterruptible(HZ);
3994 }
3995
3996 iounmap(vaddr);
3997
3998 /* we leak the DMA buffer here ... no choice since the controller could
3999 still complete the command. */
4000 if (i == 10) {
4001 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4002 opcode, type);
4003 return -ETIMEDOUT;
4004 }
4005
4006 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4007
4008 if (tag & 2) {
4009 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4010 opcode, type);
4011 return -EIO;
4012 }
4013
4014 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4015 opcode, type);
4016 return 0;
4017}
4018
4019#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4020#define cciss_noop(p) cciss_message(p, 3, 0)
4021
4022static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4023{
4024/* the #defines are stolen from drivers/pci/msi.h. */
4025#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4026#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4027
4028 int pos;
4029 u16 control = 0;
4030
4031 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4032 if (pos) {
4033 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4034 if (control & PCI_MSI_FLAGS_ENABLE) {
4035 printk(KERN_INFO "cciss: resetting MSI\n");
4036 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4037 }
4038 }
4039
4040 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4041 if (pos) {
4042 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4043 if (control & PCI_MSIX_FLAGS_ENABLE) {
4044 printk(KERN_INFO "cciss: resetting MSI-X\n");
4045 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4046 }
4047 }
4048
4049 return 0;
4050}
4051
4052/* This does a hard reset of the controller using PCI power management
4053 * states. */
4054static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4055{
4056 u16 pmcsr, saved_config_space[32];
4057 int i, pos;
4058
4059 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4060
4061 /* This is very nearly the same thing as
4062
4063 pci_save_state(pci_dev);
4064 pci_set_power_state(pci_dev, PCI_D3hot);
4065 pci_set_power_state(pci_dev, PCI_D0);
4066 pci_restore_state(pci_dev);
4067
4068 but we can't use these nice canned kernel routines on
4069 kexec, because they also check the MSI/MSI-X state in PCI
4070 configuration space and do the wrong thing when it is
4071 set/cleared. Also, the pci_save/restore_state functions
4072 violate the ordering requirements for restoring the
4073 configuration space from the CCISS document (see the
4074 comment below). So we roll our own .... */
4075
4076 for (i = 0; i < 32; i++)
4077 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4078
4079 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4080 if (pos == 0) {
4081 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4082 return -ENODEV;
4083 }
4084
4085 /* Quoting from the Open CISS Specification: "The Power
4086 * Management Control/Status Register (CSR) controls the power
4087 * state of the device. The normal operating state is D0,
4088 * CSR=00h. The software off state is D3, CSR=03h. To reset
4089 * the controller, place the interface device in D3 then to
4090 * D0, this causes a secondary PCI reset which will reset the
4091 * controller." */
4092
4093 /* enter the D3hot power management state */
4094 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4095 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4096 pmcsr |= PCI_D3hot;
4097 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4098
4099 schedule_timeout_uninterruptible(HZ >> 1);
4100
4101 /* enter the D0 power management state */
4102 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4103 pmcsr |= PCI_D0;
4104 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4105
4106 schedule_timeout_uninterruptible(HZ >> 1);
4107
4108 /* Restore the PCI configuration space. The Open CISS
4109 * Specification says, "Restore the PCI Configuration
4110 * Registers, offsets 00h through 60h. It is important to
4111 * restore the command register, 16-bits at offset 04h,
4112 * last. Do not restore the configuration status register,
4113 * 16-bits at offset 06h." Note that the offset is 2*i. */
4114 for (i = 0; i < 32; i++) {
4115 if (i == 2 || i == 3)
4116 continue;
4117 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4118 }
4119 wmb();
4120 pci_write_config_word(pdev, 4, saved_config_space[2]);
4121
4122 return 0;
4123}
4124
1da177e4
LT		 4125/*
4126 * This is it. Find all the controllers and register them. I really hate
4127 * stealing all these major device numbers.
4128 * returns the number of block devices registered.
4129 */
4130static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4131 const struct pci_device_id *ent)
1da177e4 4132{
1da177e4 4133 int i;
799202cb 4134 int j = 0;
1da177e4 4135 int rc;
22bece00 4136 int dac, return_code;
212a5026 4137 InquiryData_struct *inq_buff;
1da177e4 4138
82eb03cf
CC		 4139 if (reset_devices) {
4140 /* Reset the controller with a PCI power-cycle */
4141 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4142 return -ENODEV;
4143
5e18cfd0
JA		 4144 /* Now try to get the controller to respond to a no-op. Some
4145 devices (notably the HP Smart Array 5i Controller) need
4146 up to 30 seconds to respond. */
5e4c91c8 4147 for (i=0; i<30; i++) {
82eb03cf
CC		 4148 if (cciss_noop(pdev) == 0)
4149 break;
5e4c91c8
JA		 4150
4151 schedule_timeout_uninterruptible(HZ);
4152 }
4153 if (i == 30) {
4154 printk(KERN_ERR "cciss: controller seems dead\n");
4155 return -EBUSY;
82eb03cf
CC		 4156 }
4157 }
4158
1da177e4 4159 i = alloc_cciss_hba();
7c832835 4160 if (i < 0)
e2019b58 4161 return -1;
1f8ef380
MM		 4162
4163 hba[i]->busy_initializing = 1;
8a3173de
JA		 4164 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4165 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4166 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4167
1da177e4 4168 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 4169 goto clean0;
1da177e4
LT		 4170
4171 sprintf(hba[i]->devname, "cciss%d", i);
4172 hba[i]->ctlr = i;
4173 hba[i]->pdev = pdev;
4174
b368c9dd
AP		 4175 init_completion(&hba[i]->scan_wait);
4176
7fe06326
AP		 4177 if (cciss_create_hba_sysfs_entry(hba[i]))
4178 goto clean0;
4179
1da177e4 4180 /* configure PCI DMA stuff */
6a35528a 4181 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4182 dac = 1;
284901a9 4183 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4184 dac = 0;
1da177e4 4185 else {
40aabb58 4186 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4187 goto clean1;
4188 }
4189
4190 /*
4191 * register with the major number, or get a dynamic major number
4192 * by passing 0 as argument. This is done for greater than
4193 * 8 controller support.
4194 */
4195 if (i < MAX_CTLR_ORIG)
564de74a 4196 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4197 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4198 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4199 printk(KERN_ERR
7c832835
BH		 4200 "cciss: Unable to get major number %d for %s "
4201 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4202 goto clean1;
7c832835 4203 } else {
1da177e4
LT		 4204 if (i >= MAX_CTLR_ORIG)
4205 hba[i]->major = rc;
4206 }
4207
4208 /* make sure the board interrupts are off */
4209 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4210 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4211 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4212 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4213 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4214 goto clean2;
4215 }
40aabb58
BH		 4216
4217 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4218 hba[i]->devname, pdev->device, pci_name(pdev),
4219 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4220
4221 hba[i]->cmd_pool_bits =
061837bc
JL		 4222 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4223 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4224 hba[i]->cmd_pool = (CommandList_struct *)
4225 pci_alloc_consistent(hba[i]->pdev,
f880632f 4226 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4227 &(hba[i]->cmd_pool_dhandle));
4228 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4229 pci_alloc_consistent(hba[i]->pdev,
f880632f 4230 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4231 &(hba[i]->errinfo_pool_dhandle));
4232 if ((hba[i]->cmd_pool_bits == NULL)
4233 || (hba[i]->cmd_pool == NULL)
4234 || (hba[i]->errinfo_pool == NULL)) {
4235 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4236 goto clean4;
4237 }
1da177e4 4238 spin_lock_init(&hba[i]->lock);
1da177e4 4239
7c832835
BH		 4240 /* Initialize the pdev driver private data.
4241 have it point to hba[i]. */
1da177e4 4242 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4243 /* command and error info recs zeroed out before
4244 they are used */
4245 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4246 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4247 * sizeof(unsigned long));
1da177e4 4248
6ae5ce8e
MM		 4249 hba[i]->num_luns = 0;
4250 hba[i]->highest_lun = -1;
4251 for (j = 0; j < CISS_MAX_LUN; j++) {
4252 hba[i]->drv[j].raid_level = -1;
4253 hba[i]->drv[j].queue = NULL;
4254 hba[i]->gendisk[j] = NULL;
4255 }
1da177e4
LT		 4256
4257 cciss_scsi_setup(i);
4258
4259 /* Turn the interrupts on so we can service requests */
4260 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4261
22bece00
MM		 4262 /* Get the firmware version */
4263 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4264 if (inq_buff == NULL) {
4265 printk(KERN_ERR "cciss: out of memory\n");
4266 goto clean4;
4267 }
4268
4269 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4270 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4271 if (return_code == IO_OK) {
4272 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4273 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4274 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4275 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4276 } else { /* send command failed */
4277 printk(KERN_WARNING "cciss: unable to determine firmware"
4278 " version of controller\n");
4279 }
212a5026 4280 kfree(inq_buff);
22bece00 4281
1da177e4 4282 cciss_procinit(i);
92c4231a
MM		 4283
4284 hba[i]->cciss_max_sectors = 2048;
4285
2d11d993 4286 rebuild_lun_table(hba[i], 1, 0);
b368c9dd 4287 hba[i]->busy_initializing = 0;
e2019b58 4288 return 1;
1da177e4 4289
6ae5ce8e 4290clean4:
6044ec88 4291 kfree(hba[i]->cmd_pool_bits);
7c832835 4292 if (hba[i]->cmd_pool)
1da177e4 4293 pci_free_consistent(hba[i]->pdev,
f880632f 4294 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4295 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4296 if (hba[i]->errinfo_pool)
1da177e4 4297 pci_free_consistent(hba[i]->pdev,
f880632f 4298 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4299 hba[i]->errinfo_pool,
4300 hba[i]->errinfo_pool_dhandle);
fb86a35b 4301 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4302clean2:
1da177e4 4303 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4304clean1:
7fe06326
AP		 4305 cciss_destroy_hba_sysfs_entry(hba[i]);
4306clean0:
1f8ef380 4307 hba[i]->busy_initializing = 0;
799202cb
MM		 4308 /* cleanup any queues that may have been initialized */
4309 for (j=0; j <= hba[i]->highest_lun; j++){
4310 drive_info_struct *drv = &(hba[i]->drv[j]);
4311 if (drv->queue)
4312 blk_cleanup_queue(drv->queue);
4313 }
872225ca
MM		 4314 /*
4315 * Deliberately omit pci_disable_device(): it does something nasty to
4316 * Smart Array controllers that pci_enable_device does not undo
4317 */
799202cb 4318 pci_release_regions(pdev);
799202cb 4319 pci_set_drvdata(pdev, NULL);
61808c2b 4320 free_hba(i);
e2019b58 4321 return -1;
1da177e4
LT		 4322}
4323
e9ca75b5 4324static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4325{
4326 ctlr_info_t *tmp_ptr;
e9ca75b5 4327 int i;
1da177e4 4328 char flush_buf[4];
7c832835 4329 int return_code;
1da177e4 4330
e9ca75b5
GB		 4331 tmp_ptr = pci_get_drvdata(pdev);
4332 if (tmp_ptr == NULL)
4333 return;
4334 i = tmp_ptr->ctlr;
4335 if (hba[i] == NULL)
4336 return;
4337
4338 /* Turn board interrupts off and send the flush cache command */
4339 /* sendcmd will turn off interrupt, and send the flush...
4340 * To write all data in the battery backed cache to disks */
4341 memset(flush_buf, 0, 4);
b57695fe 4342 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4343 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4344 if (return_code == IO_OK) {
4345 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4346 } else {
4347 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4348 }
4349 free_irq(hba[i]->intr[2], hba[i]);
4350}
4351
4352static void __devexit cciss_remove_one(struct pci_dev *pdev)
4353{
4354 ctlr_info_t *tmp_ptr;
4355 int i, j;
4356
7c832835
BH		 4357 if (pci_get_drvdata(pdev) == NULL) {
4358 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4359 return;
4360 }
0a9279cc 4361
1da177e4
LT		 4362 tmp_ptr = pci_get_drvdata(pdev);
4363 i = tmp_ptr->ctlr;
7c832835 4364 if (hba[i] == NULL) {
1da177e4 4365 printk(KERN_ERR "cciss: device appears to "
7c832835 4366 "already be removed \n");
1da177e4
LT		 4367 return;
4368 }
b6550777 4369
b368c9dd 4370 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4371
b368c9dd 4372 remove_from_scan_list(hba[i]);
b6550777
BH		 4373 remove_proc_entry(hba[i]->devname, proc_cciss);
4374 unregister_blkdev(hba[i]->major, hba[i]->devname);
4375
4376 /* remove it from the disk list */
4377 for (j = 0; j < CISS_MAX_LUN; j++) {
4378 struct gendisk *disk = hba[i]->gendisk[j];
4379 if (disk) {
165125e1 4380 struct request_queue *q = disk->queue;
b6550777 4381
097d0264 4382 if (disk->flags & GENHD_FL_UP) {
8ce51966 4383 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4384 del_gendisk(disk);
097d0264 4385 }
b6550777
BH		 4386 if (q)
4387 blk_cleanup_queue(q);
4388 }
4389 }
4390
ba198efb 4391#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4392 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4393#endif
b6550777 4394
e9ca75b5 4395 cciss_shutdown(pdev);
fb86a35b
MM		 4396
4397#ifdef CONFIG_PCI_MSI
7c832835
BH		 4398 if (hba[i]->msix_vector)
4399 pci_disable_msix(hba[i]->pdev);
4400 else if (hba[i]->msi_vector)
4401 pci_disable_msi(hba[i]->pdev);
4402#endif /* CONFIG_PCI_MSI */
fb86a35b 4403
1da177e4 4404 iounmap(hba[i]->vaddr);
1da177e4 4405
f880632f 4406 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4407 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4408 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4409 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4410 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4411 /*
4412 * Deliberately omit pci_disable_device(): it does something nasty to
4413 * Smart Array controllers that pci_enable_device does not undo
4414 */
7c832835 4415 pci_release_regions(pdev);
4e570309 4416 pci_set_drvdata(pdev, NULL);
7fe06326 4417 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4418 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4419 free_hba(i);
7c832835 4420}
1da177e4
LT		 4421
4422static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4423 .name = "cciss",
4424 .probe = cciss_init_one,
4425 .remove = __devexit_p(cciss_remove_one),
4426 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4427 .shutdown = cciss_shutdown,
1da177e4
LT		 4428};
4429
4430/*
4431 * This is it. Register the PCI driver information for the cards we control
7c832835 4432 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4433 */
4434static int __init cciss_init(void)
4435{
7fe06326
AP		 4436 int err;
4437
10cbda97
JA		 4438 /*
4439 * The hardware requires that commands are aligned on a 64-bit
4440 * boundary. Given that we use pci_alloc_consistent() to allocate an
4441 * array of them, the size must be a multiple of 8 bytes.
4442 */
4443 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4444
1da177e4
LT		 4445 printk(KERN_INFO DRIVER_NAME "\n");
4446
7fe06326
AP		 4447 err = bus_register(&cciss_bus_type);
4448 if (err)
4449 return err;
4450
b368c9dd
AP		 4451 /* Start the scan thread */
4452 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4453 if (IS_ERR(cciss_scan_thread)) {
4454 err = PTR_ERR(cciss_scan_thread);
4455 goto err_bus_unregister;
4456 }
4457
1da177e4 4458 /* Register for our PCI devices */
7fe06326
AP		 4459 err = pci_register_driver(&cciss_pci_driver);
4460 if (err)
b368c9dd 4461 goto err_thread_stop;
7fe06326 4462
617e1344 4463 return err;
7fe06326 4464
b368c9dd
AP		 4465err_thread_stop:
4466 kthread_stop(cciss_scan_thread);
4467err_bus_unregister:
7fe06326 4468 bus_unregister(&cciss_bus_type);
b368c9dd 4469
7fe06326 4470 return err;
1da177e4
LT		 4471}
4472
4473static void __exit cciss_cleanup(void)
4474{
4475 int i;
4476
4477 pci_unregister_driver(&cciss_pci_driver);
4478 /* double check that all controller entrys have been removed */
7c832835
BH		 4479 for (i = 0; i < MAX_CTLR; i++) {
4480 if (hba[i] != NULL) {
1da177e4 4481 printk(KERN_WARNING "cciss: had to remove"
7c832835 4482 " controller %d\n", i);
1da177e4
LT		 4483 cciss_remove_one(hba[i]->pdev);
4484 }
4485 }
b368c9dd 4486 kthread_stop(cciss_scan_thread);
928b4d8c 4487 remove_proc_entry("driver/cciss", NULL);
7fe06326 4488 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4489}
4490
33079b21
MM		 4491static void fail_all_cmds(unsigned long ctlr)
4492{
4493 /* If we get here, the board is apparently dead. */
4494 ctlr_info_t *h = hba[ctlr];
4495 CommandList_struct *c;
4496 unsigned long flags;
4497
4498 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4499 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4500
4501 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4502
7c832835 4503 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4504
4505 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4506 while (!hlist_empty(&h->reqQ)) {
4507 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4508 removeQ(c);
33079b21 4509 h->Qdepth--;
8a3173de 4510 addQ(&h->cmpQ, c);
33079b21
MM		 4511 }
4512
4513 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4514 while (!hlist_empty(&h->cmpQ)) {
4515 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4516 removeQ(c);
b59e64d0
HR		 4517 if (c->cmd_type != CMD_MSG_STALE)
4518 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4519 if (c->cmd_type == CMD_RWREQ) {
4520 complete_command(h, c, 0);
4521 } else if (c->cmd_type == CMD_IOCTL_PEND)
4522 complete(c->waiting);
4523#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4524 else if (c->cmd_type == CMD_SCSI)
4525 complete_scsi_command(c, 0, 0);
33079b21
MM		 4526#endif
4527 }
4528 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4529 return;
4530}
4531
1da177e4
LT		 4532module_init(cciss_init);
4533module_exit(cciss_cleanup);
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