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cciss: Add a "raid_level" attribute to each logical drive in /sys
[deliverable/linux.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1da177e4
LT		 44#include <asm/uaccess.h>
45#include <asm/io.h>
46
eb0df996 47#include <linux/dma-mapping.h>
1da177e4
LT		 48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/completion.h>
d5d3b736 51#include <scsi/scsi.h>
03bbfee5
MMOD		 52#include <scsi/sg.h>
53#include <scsi/scsi_ioctl.h>
54#include <linux/cdrom.h>
231bc2a2 55#include <linux/scatterlist.h>
0a9279cc 56#include <linux/kthread.h>
1da177e4
LT		 57
58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 61
62/* Embedded module documentation macros - see modules.h */
63MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68MODULE_VERSION("3.6.20");
1da177e4
LT		 69MODULE_LICENSE("GPL");
70
71#include "cciss_cmd.h"
72#include "cciss.h"
73#include <linux/cciss_ioctl.h>
74
75/* define the PCI info for the cards we can control */
76static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 104 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
105 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 106 {0,}
107};
7c832835 108
1da177e4
LT		 109MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
110
1da177e4
LT		 111/* board_id = Subsystem Device ID & Vendor ID
112 * product = Marketing Name for the board
7c832835 113 * access = Address of the struct of function pointers
1da177e4
LT		 114 */
115static struct board_type products[] = {
49153998
MM		 116 {0x40700E11, "Smart Array 5300", &SA5_access},
117 {0x40800E11, "Smart Array 5i", &SA5B_access},
118 {0x40820E11, "Smart Array 532", &SA5B_access},
119 {0x40830E11, "Smart Array 5312", &SA5B_access},
120 {0x409A0E11, "Smart Array 641", &SA5_access},
121 {0x409B0E11, "Smart Array 642", &SA5_access},
122 {0x409C0E11, "Smart Array 6400", &SA5_access},
123 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
124 {0x40910E11, "Smart Array 6i", &SA5_access},
125 {0x3225103C, "Smart Array P600", &SA5_access},
126 {0x3223103C, "Smart Array P800", &SA5_access},
127 {0x3234103C, "Smart Array P400", &SA5_access},
128 {0x3235103C, "Smart Array P400i", &SA5_access},
129 {0x3211103C, "Smart Array E200i", &SA5_access},
130 {0x3212103C, "Smart Array E200", &SA5_access},
131 {0x3213103C, "Smart Array E200i", &SA5_access},
132 {0x3214103C, "Smart Array E200i", &SA5_access},
133 {0x3215103C, "Smart Array E200i", &SA5_access},
134 {0x3237103C, "Smart Array E500", &SA5_access},
135 {0x323D103C, "Smart Array P700m", &SA5_access},
136 {0x3241103C, "Smart Array P212", &SA5_access},
137 {0x3243103C, "Smart Array P410", &SA5_access},
138 {0x3245103C, "Smart Array P410i", &SA5_access},
139 {0x3247103C, "Smart Array P411", &SA5_access},
140 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 141 {0x324A103C, "Smart Array P712m", &SA5_access},
142 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 143 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 144};
145
d14c4ab5 146/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 147#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 148#define MAX_IOCTL_CONFIG_WAIT 1000
149
150/*define how many times we will try a command because of bus resets */
151#define MAX_CMD_RETRIES 3
152
1da177e4
LT		 153#define MAX_CTLR 32
154
155/* Originally cciss driver only supports 8 major numbers */
156#define MAX_CTLR_ORIG 8
157
1da177e4
LT		 158static ctlr_info_t *hba[MAX_CTLR];
159
b368c9dd
AP		 160static struct task_struct *cciss_scan_thread;
161static DEFINE_MUTEX(scan_mutex);
162static LIST_HEAD(scan_q);
163
165125e1 164static void do_cciss_request(struct request_queue *q);
7d12e780 165static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 166static int cciss_open(struct block_device *bdev, fmode_t mode);
167static int cciss_release(struct gendisk *disk, fmode_t mode);
168static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 169 unsigned int cmd, unsigned long arg);
a885c8c4 170static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 171
1da177e4 172static int cciss_revalidate(struct gendisk *disk);
2d11d993 173static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 174static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 175 int clear_all, int via_ioctl);
1da177e4 176
00988a35
MMOD		 177static void cciss_read_capacity(int ctlr, int logvol, int withirq,
178 sector_t *total_size, unsigned int *block_size);
179static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
180 sector_t *total_size, unsigned int *block_size);
181static void cciss_geometry_inquiry(int ctlr, int logvol,
182 int withirq, sector_t total_size,
183 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 184 drive_info_struct *drv);
7c832835
BH		 185static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
186 __u32);
187static void start_io(ctlr_info_t *h);
188static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
7c832835
BH		 189 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
190static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 191 __u8 page_code, unsigned char scsi3addr[],
192 int cmd_type);
85cc61ae 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
194 int attempt_retry);
195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 196
33079b21 197static void fail_all_cmds(unsigned long ctlr);
d6f4965d 198static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 199static int scan_thread(void *data);
200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 201static void cciss_hba_release(struct device *dev);
202static void cciss_device_release(struct device *dev);
361e9b07 203static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
33079b21 204
1da177e4 205#ifdef CONFIG_PROC_FS
1da177e4
LT		 206static void cciss_procinit(int i);
207#else
7c832835
BH		 208static void cciss_procinit(int i)
209{
210}
211#endif /* CONFIG_PROC_FS */
1da177e4
LT		 212
213#ifdef CONFIG_COMPAT
ef7822c2
AV		 214static int cciss_compat_ioctl(struct block_device *, fmode_t,
215 unsigned, unsigned long);
1da177e4
LT		 216#endif
217
83d5cde4 218static const struct block_device_operations cciss_fops = {
7c832835 219 .owner = THIS_MODULE,
ef7822c2
AV		 220 .open = cciss_open,
221 .release = cciss_release,
222 .locked_ioctl = cciss_ioctl,
7c832835 223 .getgeo = cciss_getgeo,
1da177e4 224#ifdef CONFIG_COMPAT
ef7822c2 225 .compat_ioctl = cciss_compat_ioctl,
1da177e4 226#endif
7c832835 227 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 228};
229
230/*
231 * Enqueuing and dequeuing functions for cmdlists.
232 */
8a3173de 233static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 234{
8a3173de 235 hlist_add_head(&c->list, list);
1da177e4
LT		 236}
237
8a3173de 238static inline void removeQ(CommandList_struct *c)
1da177e4 239{
b59e64d0
HR		 240 /*
241 * After kexec/dump some commands might still
242 * be in flight, which the firmware will try
243 * to complete. Resetting the firmware doesn't work
244 * with old fw revisions, so we have to mark
245 * them off as 'stale' to prevent the driver from
246 * falling over.
247 */
248 if (WARN_ON(hlist_unhashed(&c->list))) {
249 c->cmd_type = CMD_MSG_STALE;
8a3173de 250 return;
b59e64d0 251 }
8a3173de
JA		 252
253 hlist_del_init(&c->list);
1da177e4
LT		 254}
255
256#include "cciss_scsi.c" /* For SCSI tape support */
257
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
3ff1111d
SC		 606static ssize_t cciss_show_raid_level(struct device *dev,
607 struct device_attribute *attr, char *buf)
608{
609 drive_info_struct *drv = dev_get_drvdata(dev);
610 struct ctlr_info *h = to_hba(drv->dev->parent);
611 int raid;
612 unsigned long flags;
613
614 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
615 if (h->busy_configuring) {
616 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
617 return -EBUSY;
618 }
619 raid = drv->raid_level;
620 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
621 if (raid < 0 || raid > RAID_UNKNOWN)
622 raid = RAID_UNKNOWN;
623
624 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
625 raid_label[raid]);
626}
627DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
628
d6f4965d
AP		 629static struct attribute *cciss_host_attrs[] = {
630 &dev_attr_rescan.attr,
631 NULL
632};
633
634static struct attribute_group cciss_host_attr_group = {
635 .attrs = cciss_host_attrs,
636};
637
638static struct attribute_group *cciss_host_attr_groups[] = {
639 &cciss_host_attr_group,
640 NULL
641};
642
643static struct device_type cciss_host_type = {
644 .name = "cciss_host",
645 .groups = cciss_host_attr_groups,
617e1344 646 .release = cciss_hba_release,
d6f4965d
AP		 647};
648
7fe06326
AP		 649static struct attribute *cciss_dev_attrs[] = {
650 &dev_attr_unique_id.attr,
651 &dev_attr_model.attr,
652 &dev_attr_vendor.attr,
653 &dev_attr_rev.attr,
ce84a8ae 654 &dev_attr_lunid.attr,
3ff1111d 655 &dev_attr_raid_level.attr,
7fe06326
AP		 656 NULL
657};
658
659static struct attribute_group cciss_dev_attr_group = {
660 .attrs = cciss_dev_attrs,
661};
662
a4dbd674 663static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 664 &cciss_dev_attr_group,
665 NULL
666};
667
668static struct device_type cciss_dev_type = {
669 .name = "cciss_device",
670 .groups = cciss_dev_attr_groups,
617e1344 671 .release = cciss_device_release,
7fe06326
AP		 672};
673
674static struct bus_type cciss_bus_type = {
675 .name = "cciss",
676};
677
617e1344
SC		 678/*
679 * cciss_hba_release is called when the reference count
680 * of h->dev goes to zero.
681 */
682static void cciss_hba_release(struct device *dev)
683{
684 /*
685 * nothing to do, but need this to avoid a warning
686 * about not having a release handler from lib/kref.c.
687 */
688}
7fe06326
AP		 689
690/*
691 * Initialize sysfs entry for each controller. This sets up and registers
692 * the 'cciss#' directory for each individual controller under
693 * /sys/bus/pci/devices/<dev>/.
694 */
695static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
696{
697 device_initialize(&h->dev);
698 h->dev.type = &cciss_host_type;
699 h->dev.bus = &cciss_bus_type;
700 dev_set_name(&h->dev, "%s", h->devname);
701 h->dev.parent = &h->pdev->dev;
702
703 return device_add(&h->dev);
704}
705
706/*
707 * Remove sysfs entries for an hba.
708 */
709static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
710{
711 device_del(&h->dev);
617e1344
SC		 712 put_device(&h->dev); /* final put. */
713}
714
715/* cciss_device_release is called when the reference count
716 * of h->drv[x].dev goes to zero.
717 */
718static void cciss_device_release(struct device *dev)
719{
720 kfree(dev);
7fe06326
AP		 721}
722
723/*
724 * Initialize sysfs for each logical drive. This sets up and registers
725 * the 'c#d#' directory for each individual logical drive under
726 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
727 * /sys/block/cciss!c#d# to this entry.
728 */
617e1344 729static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 730 int drv_index)
731{
617e1344
SC		 732 struct device *dev;
733
8ce51966
SC		 734 /* Special case for c*d0, we only create it once. */
735 if (drv_index == 0 && h->drv[drv_index].dev != NULL)
736 return 0;
737
617e1344
SC		 738 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
739 if (!dev)
740 return -ENOMEM;
741 device_initialize(dev);
742 dev->type = &cciss_dev_type;
743 dev->bus = &cciss_bus_type;
744 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
745 dev->parent = &h->dev;
746 h->drv[drv_index].dev = dev;
747 dev_set_drvdata(dev, &h->drv[drv_index]);
748 return device_add(dev);
7fe06326
AP		 749}
750
751/*
752 * Remove sysfs entries for a logical drive.
753 */
8ce51966
SC		 754static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
755 int ctlr_exiting)
7fe06326 756{
617e1344 757 struct device *dev = h->drv[drv_index].dev;
8ce51966
SC		 758
759 /* special case for c*d0, we only destroy it on controller exit */
760 if (drv_index == 0 && !ctlr_exiting)
761 return;
762
617e1344
SC		 763 device_del(dev);
764 put_device(dev); /* the "final" put. */
765 h->drv[drv_index].dev = NULL;
7fe06326
AP		 766}
767
7c832835
BH		 768/*
769 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 770 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 771 * which ones are free or in use. For operations that can wait for kmalloc
772 * to possible sleep, this routine can be called with get_from_pool set to 0.
773 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
774 */
775static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 776{
777 CommandList_struct *c;
7c832835 778 int i;
1da177e4
LT		 779 u64bit temp64;
780 dma_addr_t cmd_dma_handle, err_dma_handle;
781
7c832835
BH		 782 if (!get_from_pool) {
783 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
784 sizeof(CommandList_struct), &cmd_dma_handle);
785 if (c == NULL)
786 return NULL;
1da177e4
LT		 787 memset(c, 0, sizeof(CommandList_struct));
788
33079b21
MM		 789 c->cmdindex = -1;
790
7c832835
BH		 791 c->err_info = (ErrorInfo_struct *)
792 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
793 &err_dma_handle);
794
795 if (c->err_info == NULL) {
796 pci_free_consistent(h->pdev,
1da177e4
LT		 797 sizeof(CommandList_struct), c, cmd_dma_handle);
798 return NULL;
799 }
800 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 801 } else { /* get it out of the controllers pool */
802
803 do {
f880632f
MM		 804 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
805 if (i == h->nr_cmds)
7c832835
BH		 806 return NULL;
807 } while (test_and_set_bit
808 (i & (BITS_PER_LONG - 1),
809 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 810#ifdef CCISS_DEBUG
811 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
812#endif
7c832835 813 c = h->cmd_pool + i;
1da177e4 814 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 815 cmd_dma_handle = h->cmd_pool_dhandle
816 + i * sizeof(CommandList_struct);
1da177e4
LT		 817 c->err_info = h->errinfo_pool + i;
818 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 819 err_dma_handle = h->errinfo_pool_dhandle
820 + i * sizeof(ErrorInfo_struct);
821 h->nr_allocs++;
33079b21
MM		 822
823 c->cmdindex = i;
7c832835 824 }
1da177e4 825
8a3173de 826 INIT_HLIST_NODE(&c->list);
1da177e4 827 c->busaddr = (__u32) cmd_dma_handle;
7c832835 828 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 829 c->ErrDesc.Addr.lower = temp64.val32.lower;
830 c->ErrDesc.Addr.upper = temp64.val32.upper;
831 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 832
7c832835
BH		 833 c->ctlr = h->ctlr;
834 return c;
1da177e4
LT		 835}
836
7c832835
BH		 837/*
838 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 839 */
840static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
841{
842 int i;
843 u64bit temp64;
844
7c832835 845 if (!got_from_pool) {
1da177e4
LT		 846 temp64.val32.lower = c->ErrDesc.Addr.lower;
847 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 848 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
849 c->err_info, (dma_addr_t) temp64.val);
850 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
851 c, (dma_addr_t) c->busaddr);
852 } else {
1da177e4 853 i = c - h->cmd_pool;
7c832835
BH		 854 clear_bit(i & (BITS_PER_LONG - 1),
855 h->cmd_pool_bits + (i / BITS_PER_LONG));
856 h->nr_frees++;
857 }
1da177e4
LT		 858}
859
860static inline ctlr_info_t *get_host(struct gendisk *disk)
861{
7c832835 862 return disk->queue->queuedata;
1da177e4
LT		 863}
864
865static inline drive_info_struct *get_drv(struct gendisk *disk)
866{
867 return disk->private_data;
868}
869
870/*
871 * Open. Make sure the device is really there.
872 */
ef7822c2 873static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 874{
ef7822c2
AV		 875 ctlr_info_t *host = get_host(bdev->bd_disk);
876 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 877
878#ifdef CCISS_DEBUG
ef7822c2 879 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 880#endif /* CCISS_DEBUG */
1da177e4 881
2e043986 882 if (drv->busy_configuring)
ddd47442 883 return -EBUSY;
1da177e4
LT		 884 /*
885 * Root is allowed to open raw volume zero even if it's not configured
886 * so array config can still work. Root is also allowed to open any
887 * volume that has a LUN ID, so it can issue IOCTL to reread the
888 * disk information. I don't think I really like this
889 * but I'm already using way to many device nodes to claim another one
890 * for "raw controller".
891 */
7a06f789 892 if (drv->heads == 0) {
ef7822c2 893 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 894 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 895 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 896 return -ENXIO;
1da177e4 897 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 898 } else if (memcmp(drv->LunID, CTLR_LUNID,
899 sizeof(drv->LunID))) {
1da177e4
LT		 900 return -ENXIO;
901 }
902 }
903 if (!capable(CAP_SYS_ADMIN))
904 return -EPERM;
905 }
906 drv->usage_count++;
907 host->usage_count++;
908 return 0;
909}
7c832835 910
1da177e4
LT		 911/*
912 * Close. Sync first.
913 */
ef7822c2 914static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 915{
ef7822c2
AV		 916 ctlr_info_t *host = get_host(disk);
917 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 918
919#ifdef CCISS_DEBUG
ef7822c2 920 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 921#endif /* CCISS_DEBUG */
1da177e4
LT		 922
923 drv->usage_count--;
924 host->usage_count--;
925 return 0;
926}
927
928#ifdef CONFIG_COMPAT
929
ef7822c2
AV		 930static int do_ioctl(struct block_device *bdev, fmode_t mode,
931 unsigned cmd, unsigned long arg)
1da177e4
LT		 932{
933 int ret;
934 lock_kernel();
ef7822c2 935 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 936 unlock_kernel();
937 return ret;
938}
939
ef7822c2
AV		 940static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
941 unsigned cmd, unsigned long arg);
942static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
943 unsigned cmd, unsigned long arg);
1da177e4 944
ef7822c2
AV		 945static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
946 unsigned cmd, unsigned long arg)
1da177e4
LT		 947{
948 switch (cmd) {
949 case CCISS_GETPCIINFO:
950 case CCISS_GETINTINFO:
951 case CCISS_SETINTINFO:
952 case CCISS_GETNODENAME:
953 case CCISS_SETNODENAME:
954 case CCISS_GETHEARTBEAT:
955 case CCISS_GETBUSTYPES:
956 case CCISS_GETFIRMVER:
957 case CCISS_GETDRIVVER:
958 case CCISS_REVALIDVOLS:
959 case CCISS_DEREGDISK:
960 case CCISS_REGNEWDISK:
961 case CCISS_REGNEWD:
962 case CCISS_RESCANDISK:
963 case CCISS_GETLUNINFO:
ef7822c2 964 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 965
966 case CCISS_PASSTHRU32:
ef7822c2 967 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 968 case CCISS_BIG_PASSTHRU32:
ef7822c2 969 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 970
971 default:
972 return -ENOIOCTLCMD;
973 }
974}
975
ef7822c2
AV		 976static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
977 unsigned cmd, unsigned long arg)
1da177e4
LT		 978{
979 IOCTL32_Command_struct __user *arg32 =
7c832835 980 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 981 IOCTL_Command_struct arg64;
982 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
983 int err;
984 u32 cp;
985
986 err = 0;
7c832835
BH		 987 err |=
988 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
989 sizeof(arg64.LUN_info));
990 err |=
991 copy_from_user(&arg64.Request, &arg32->Request,
992 sizeof(arg64.Request));
993 err |=
994 copy_from_user(&arg64.error_info, &arg32->error_info,
995 sizeof(arg64.error_info));
1da177e4
LT		 996 err |= get_user(arg64.buf_size, &arg32->buf_size);
997 err |= get_user(cp, &arg32->buf);
998 arg64.buf = compat_ptr(cp);
999 err |= copy_to_user(p, &arg64, sizeof(arg64));
1000
1001 if (err)
1002 return -EFAULT;
1003
ef7822c2 1004 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1005 if (err)
1006 return err;
7c832835
BH		 1007 err |=
1008 copy_in_user(&arg32->error_info, &p->error_info,
1009 sizeof(arg32->error_info));
1da177e4
LT		 1010 if (err)
1011 return -EFAULT;
1012 return err;
1013}
1014
ef7822c2
AV		 1015static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1016 unsigned cmd, unsigned long arg)
1da177e4
LT		 1017{
1018 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1019 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1020 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1021 BIG_IOCTL_Command_struct __user *p =
1022 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1023 int err;
1024 u32 cp;
1025
1026 err = 0;
7c832835
BH		 1027 err |=
1028 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1029 sizeof(arg64.LUN_info));
1030 err |=
1031 copy_from_user(&arg64.Request, &arg32->Request,
1032 sizeof(arg64.Request));
1033 err |=
1034 copy_from_user(&arg64.error_info, &arg32->error_info,
1035 sizeof(arg64.error_info));
1da177e4
LT		 1036 err |= get_user(arg64.buf_size, &arg32->buf_size);
1037 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1038 err |= get_user(cp, &arg32->buf);
1039 arg64.buf = compat_ptr(cp);
1040 err |= copy_to_user(p, &arg64, sizeof(arg64));
1041
1042 if (err)
7c832835 1043 return -EFAULT;
1da177e4 1044
ef7822c2 1045 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1046 if (err)
1047 return err;
7c832835
BH		 1048 err |=
1049 copy_in_user(&arg32->error_info, &p->error_info,
1050 sizeof(arg32->error_info));
1da177e4
LT		 1051 if (err)
1052 return -EFAULT;
1053 return err;
1054}
1055#endif
a885c8c4
CH		 1056
1057static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1058{
1059 drive_info_struct *drv = get_drv(bdev->bd_disk);
1060
1061 if (!drv->cylinders)
1062 return -ENXIO;
1063
1064 geo->heads = drv->heads;
1065 geo->sectors = drv->sectors;
1066 geo->cylinders = drv->cylinders;
1067 return 0;
1068}
1069
0a9279cc
MM		 1070static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1071{
1072 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1073 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1074 (void)check_for_unit_attention(host, c);
1075}
1da177e4 1076/*
7c832835 1077 * ioctl
1da177e4 1078 */
ef7822c2 1079static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1080 unsigned int cmd, unsigned long arg)
1da177e4 1081{
1da177e4
LT		 1082 struct gendisk *disk = bdev->bd_disk;
1083 ctlr_info_t *host = get_host(disk);
1084 drive_info_struct *drv = get_drv(disk);
1085 int ctlr = host->ctlr;
1086 void __user *argp = (void __user *)arg;
1087
1088#ifdef CCISS_DEBUG
1089 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1090#endif /* CCISS_DEBUG */
1091
1092 switch (cmd) {
1da177e4 1093 case CCISS_GETPCIINFO:
7c832835
BH		 1094 {
1095 cciss_pci_info_struct pciinfo;
1096
1097 if (!arg)
1098 return -EINVAL;
1099 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1100 pciinfo.bus = host->pdev->bus->number;
1101 pciinfo.dev_fn = host->pdev->devfn;
1102 pciinfo.board_id = host->board_id;
1103 if (copy_to_user
1104 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1105 return -EFAULT;
1106 return 0;
1107 }
1da177e4 1108 case CCISS_GETINTINFO:
7c832835
BH		 1109 {
1110 cciss_coalint_struct intinfo;
1111 if (!arg)
1112 return -EINVAL;
1113 intinfo.delay =
1114 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1115 intinfo.count =
1116 readl(&host->cfgtable->HostWrite.CoalIntCount);
1117 if (copy_to_user
1118 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1119 return -EFAULT;
1120 return 0;
1121 }
1da177e4 1122 case CCISS_SETINTINFO:
1da177e4 1123 {
7c832835
BH		 1124 cciss_coalint_struct intinfo;
1125 unsigned long flags;
1126 int i;
1127
1128 if (!arg)
1129 return -EINVAL;
1130 if (!capable(CAP_SYS_ADMIN))
1131 return -EPERM;
1132 if (copy_from_user
1133 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1134 return -EFAULT;
1135 if ((intinfo.delay == 0) && (intinfo.count == 0))
1136 {
1137// printk("cciss_ioctl: delay and count cannot be 0\n");
1138 return -EINVAL;
1139 }
1140 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1141 /* Update the field, and then ring the doorbell */
1142 writel(intinfo.delay,
1143 &(host->cfgtable->HostWrite.CoalIntDelay));
1144 writel(intinfo.count,
1145 &(host->cfgtable->HostWrite.CoalIntCount));
1146 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1147
1148 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1149 if (!(readl(host->vaddr + SA5_DOORBELL)
1150 & CFGTBL_ChangeReq))
1151 break;
1152 /* delay and try again */
1153 udelay(1000);
1154 }
1155 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1156 if (i >= MAX_IOCTL_CONFIG_WAIT)
1157 return -EAGAIN;
1158 return 0;
1da177e4 1159 }
1da177e4 1160 case CCISS_GETNODENAME:
7c832835
BH		 1161 {
1162 NodeName_type NodeName;
1163 int i;
1164
1165 if (!arg)
1166 return -EINVAL;
1167 for (i = 0; i < 16; i++)
1168 NodeName[i] =
1169 readb(&host->cfgtable->ServerName[i]);
1170 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1171 return -EFAULT;
1172 return 0;
1173 }
1da177e4 1174 case CCISS_SETNODENAME:
7c832835
BH		 1175 {
1176 NodeName_type NodeName;
1177 unsigned long flags;
1178 int i;
1179
1180 if (!arg)
1181 return -EINVAL;
1182 if (!capable(CAP_SYS_ADMIN))
1183 return -EPERM;
1184
1185 if (copy_from_user
1186 (NodeName, argp, sizeof(NodeName_type)))
1187 return -EFAULT;
1188
1189 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1190
1191 /* Update the field, and then ring the doorbell */
1192 for (i = 0; i < 16; i++)
1193 writeb(NodeName[i],
1194 &host->cfgtable->ServerName[i]);
1195
1196 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1197
1198 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1199 if (!(readl(host->vaddr + SA5_DOORBELL)
1200 & CFGTBL_ChangeReq))
1201 break;
1202 /* delay and try again */
1203 udelay(1000);
1204 }
1205 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1206 if (i >= MAX_IOCTL_CONFIG_WAIT)
1207 return -EAGAIN;
1208 return 0;
1209 }
1da177e4
LT		 1210
1211 case CCISS_GETHEARTBEAT:
7c832835
BH		 1212 {
1213 Heartbeat_type heartbeat;
1214
1215 if (!arg)
1216 return -EINVAL;
1217 heartbeat = readl(&host->cfgtable->HeartBeat);
1218 if (copy_to_user
1219 (argp, &heartbeat, sizeof(Heartbeat_type)))
1220 return -EFAULT;
1221 return 0;
1222 }
1da177e4 1223 case CCISS_GETBUSTYPES:
7c832835
BH		 1224 {
1225 BusTypes_type BusTypes;
1226
1227 if (!arg)
1228 return -EINVAL;
1229 BusTypes = readl(&host->cfgtable->BusTypes);
1230 if (copy_to_user
1231 (argp, &BusTypes, sizeof(BusTypes_type)))
1232 return -EFAULT;
1233 return 0;
1234 }
1da177e4 1235 case CCISS_GETFIRMVER:
7c832835
BH		 1236 {
1237 FirmwareVer_type firmware;
1da177e4 1238
7c832835
BH		 1239 if (!arg)
1240 return -EINVAL;
1241 memcpy(firmware, host->firm_ver, 4);
1da177e4 1242
7c832835
BH		 1243 if (copy_to_user
1244 (argp, firmware, sizeof(FirmwareVer_type)))
1245 return -EFAULT;
1246 return 0;
1247 }
1248 case CCISS_GETDRIVVER:
1249 {
1250 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1251
7c832835
BH		 1252 if (!arg)
1253 return -EINVAL;
1da177e4 1254
7c832835
BH		 1255 if (copy_to_user
1256 (argp, &DriverVer, sizeof(DriverVer_type)))
1257 return -EFAULT;
1258 return 0;
1259 }
1da177e4 1260
6ae5ce8e
MM		 1261 case CCISS_DEREGDISK:
1262 case CCISS_REGNEWD:
1da177e4 1263 case CCISS_REVALIDVOLS:
2d11d993 1264 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1265
1266 case CCISS_GETLUNINFO:{
1267 LogvolInfo_struct luninfo;
1268
39ccf9a6
SC		 1269 memcpy(&luninfo.LunID, drv->LunID,
1270 sizeof(luninfo.LunID));
7c832835
BH		 1271 luninfo.num_opens = drv->usage_count;
1272 luninfo.num_parts = 0;
1273 if (copy_to_user(argp, &luninfo,
1274 sizeof(LogvolInfo_struct)))
1275 return -EFAULT;
1276 return 0;
1277 }
1da177e4 1278 case CCISS_PASSTHRU:
1da177e4 1279 {
7c832835
BH		 1280 IOCTL_Command_struct iocommand;
1281 CommandList_struct *c;
1282 char *buff = NULL;
1283 u64bit temp64;
1284 unsigned long flags;
6e9a4738 1285 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1286
7c832835
BH		 1287 if (!arg)
1288 return -EINVAL;
1da177e4 1289
7c832835
BH		 1290 if (!capable(CAP_SYS_RAWIO))
1291 return -EPERM;
1da177e4 1292
7c832835
BH		 1293 if (copy_from_user
1294 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1295 return -EFAULT;
1296 if ((iocommand.buf_size < 1) &&
1297 (iocommand.Request.Type.Direction != XFER_NONE)) {
1298 return -EINVAL;
1299 }
1300#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1301 /* Check kmalloc limits */
1302 if (iocommand.buf_size > 128000)
1303 return -EINVAL;
1304#endif
1305 if (iocommand.buf_size > 0) {
1306 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1307 if (buff == NULL)
1308 return -EFAULT;
1309 }
1310 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1311 /* Copy the data into the buffer we created */
1312 if (copy_from_user
1313 (buff, iocommand.buf, iocommand.buf_size)) {
1314 kfree(buff);
1315 return -EFAULT;
1316 }
1317 } else {
1318 memset(buff, 0, iocommand.buf_size);
1319 }
1320 if ((c = cmd_alloc(host, 0)) == NULL) {
1321 kfree(buff);
1322 return -ENOMEM;
1323 }
1324 // Fill in the command type
1325 c->cmd_type = CMD_IOCTL_PEND;
1326 // Fill in Command Header
1327 c->Header.ReplyQueue = 0; // unused in simple mode
1328 if (iocommand.buf_size > 0) // buffer to fill
1329 {
1330 c->Header.SGList = 1;
1331 c->Header.SGTotal = 1;
1332 } else // no buffers to fill
1333 {
1334 c->Header.SGList = 0;
1335 c->Header.SGTotal = 0;
1336 }
1337 c->Header.LUN = iocommand.LUN_info;
1338 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1339
7c832835
BH		 1340 // Fill in Request block
1341 c->Request = iocommand.Request;
1da177e4 1342
7c832835
BH		 1343 // Fill in the scatter gather information
1344 if (iocommand.buf_size > 0) {
1345 temp64.val = pci_map_single(host->pdev, buff,
1346 iocommand.buf_size,
1347 PCI_DMA_BIDIRECTIONAL);
1348 c->SG[0].Addr.lower = temp64.val32.lower;
1349 c->SG[0].Addr.upper = temp64.val32.upper;
1350 c->SG[0].Len = iocommand.buf_size;
1351 c->SG[0].Ext = 0; // we are not chaining
1352 }
1353 c->waiting = &wait;
1354
1355 /* Put the request on the tail of the request queue */
1356 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1357 addQ(&host->reqQ, c);
1358 host->Qdepth++;
1359 start_io(host);
1360 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1361
1362 wait_for_completion(&wait);
1363
1364 /* unlock the buffers from DMA */
1365 temp64.val32.lower = c->SG[0].Addr.lower;
1366 temp64.val32.upper = c->SG[0].Addr.upper;
1367 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1368 iocommand.buf_size,
1369 PCI_DMA_BIDIRECTIONAL);
1370
0a9279cc
MM		 1371 check_ioctl_unit_attention(host, c);
1372
7c832835
BH		 1373 /* Copy the error information out */
1374 iocommand.error_info = *(c->err_info);
1375 if (copy_to_user
1376 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1377 kfree(buff);
1da177e4
LT		 1378 cmd_free(host, c, 0);
1379 return -EFAULT;
1380 }
7c832835
BH		 1381
1382 if (iocommand.Request.Type.Direction == XFER_READ) {
1383 /* Copy the data out of the buffer we created */
1384 if (copy_to_user
1385 (iocommand.buf, buff, iocommand.buf_size)) {
1386 kfree(buff);
1387 cmd_free(host, c, 0);
1388 return -EFAULT;
1389 }
1390 }
1391 kfree(buff);
1392 cmd_free(host, c, 0);
1393 return 0;
1da177e4 1394 }
7c832835
BH		 1395 case CCISS_BIG_PASSTHRU:{
1396 BIG_IOCTL_Command_struct *ioc;
1397 CommandList_struct *c;
1398 unsigned char **buff = NULL;
1399 int *buff_size = NULL;
1400 u64bit temp64;
1401 unsigned long flags;
1402 BYTE sg_used = 0;
1403 int status = 0;
1404 int i;
6e9a4738 1405 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1406 __u32 left;
1407 __u32 sz;
1408 BYTE __user *data_ptr;
1409
1410 if (!arg)
1411 return -EINVAL;
1412 if (!capable(CAP_SYS_RAWIO))
1413 return -EPERM;
1414 ioc = (BIG_IOCTL_Command_struct *)
1415 kmalloc(sizeof(*ioc), GFP_KERNEL);
1416 if (!ioc) {
1417 status = -ENOMEM;
1418 goto cleanup1;
1419 }
1420 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1421 status = -EFAULT;
1422 goto cleanup1;
1423 }
1424 if ((ioc->buf_size < 1) &&
1425 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1426 status = -EINVAL;
1427 goto cleanup1;
7c832835
BH		 1428 }
1429 /* Check kmalloc limits using all SGs */
1430 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1431 status = -EINVAL;
1432 goto cleanup1;
1433 }
1434 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1435 status = -EINVAL;
1436 goto cleanup1;
1437 }
1438 buff =
1439 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1440 if (!buff) {
1da177e4
LT		 1441 status = -ENOMEM;
1442 goto cleanup1;
1443 }
5cbded58 1444 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1445 GFP_KERNEL);
1446 if (!buff_size) {
1447 status = -ENOMEM;
1448 goto cleanup1;
1449 }
1450 left = ioc->buf_size;
1451 data_ptr = ioc->buf;
1452 while (left) {
1453 sz = (left >
1454 ioc->malloc_size) ? ioc->
1455 malloc_size : left;
1456 buff_size[sg_used] = sz;
1457 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1458 if (buff[sg_used] == NULL) {
1da177e4 1459 status = -ENOMEM;
15534d38
JA		 1460 goto cleanup1;
1461 }
7c832835
BH		 1462 if (ioc->Request.Type.Direction == XFER_WRITE) {
1463 if (copy_from_user
1464 (buff[sg_used], data_ptr, sz)) {
f7108f91 1465 status = -EFAULT;
7c832835
BH		 1466 goto cleanup1;
1467 }
1468 } else {
1469 memset(buff[sg_used], 0, sz);
1470 }
1471 left -= sz;
1472 data_ptr += sz;
1473 sg_used++;
1474 }
1475 if ((c = cmd_alloc(host, 0)) == NULL) {
1476 status = -ENOMEM;
1477 goto cleanup1;
1478 }
1479 c->cmd_type = CMD_IOCTL_PEND;
1480 c->Header.ReplyQueue = 0;
1481
1482 if (ioc->buf_size > 0) {
1483 c->Header.SGList = sg_used;
1484 c->Header.SGTotal = sg_used;
1da177e4 1485 } else {
7c832835
BH		 1486 c->Header.SGList = 0;
1487 c->Header.SGTotal = 0;
1da177e4 1488 }
7c832835
BH		 1489 c->Header.LUN = ioc->LUN_info;
1490 c->Header.Tag.lower = c->busaddr;
1491
1492 c->Request = ioc->Request;
1493 if (ioc->buf_size > 0) {
1494 int i;
1495 for (i = 0; i < sg_used; i++) {
1496 temp64.val =
1497 pci_map_single(host->pdev, buff[i],
1498 buff_size[i],
1499 PCI_DMA_BIDIRECTIONAL);
1500 c->SG[i].Addr.lower =
1501 temp64.val32.lower;
1502 c->SG[i].Addr.upper =
1503 temp64.val32.upper;
1504 c->SG[i].Len = buff_size[i];
1505 c->SG[i].Ext = 0; /* we are not chaining */
1506 }
1507 }
1508 c->waiting = &wait;
1509 /* Put the request on the tail of the request queue */
1510 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1511 addQ(&host->reqQ, c);
1512 host->Qdepth++;
1513 start_io(host);
1514 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1515 wait_for_completion(&wait);
1516 /* unlock the buffers from DMA */
1517 for (i = 0; i < sg_used; i++) {
1518 temp64.val32.lower = c->SG[i].Addr.lower;
1519 temp64.val32.upper = c->SG[i].Addr.upper;
1520 pci_unmap_single(host->pdev,
1521 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1522 PCI_DMA_BIDIRECTIONAL);
1da177e4 1523 }
0a9279cc 1524 check_ioctl_unit_attention(host, c);
7c832835
BH		 1525 /* Copy the error information out */
1526 ioc->error_info = *(c->err_info);
1527 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1528 cmd_free(host, c, 0);
1529 status = -EFAULT;
1530 goto cleanup1;
1531 }
1532 if (ioc->Request.Type.Direction == XFER_READ) {
1533 /* Copy the data out of the buffer we created */
1534 BYTE __user *ptr = ioc->buf;
1535 for (i = 0; i < sg_used; i++) {
1536 if (copy_to_user
1537 (ptr, buff[i], buff_size[i])) {
1538 cmd_free(host, c, 0);
1539 status = -EFAULT;
1540 goto cleanup1;
1541 }
1542 ptr += buff_size[i];
1da177e4 1543 }
1da177e4 1544 }
7c832835
BH		 1545 cmd_free(host, c, 0);
1546 status = 0;
1547 cleanup1:
1548 if (buff) {
1549 for (i = 0; i < sg_used; i++)
1550 kfree(buff[i]);
1551 kfree(buff);
1552 }
1553 kfree(buff_size);
1554 kfree(ioc);
1555 return status;
1da177e4 1556 }
03bbfee5
MMOD		 1557
1558 /* scsi_cmd_ioctl handles these, below, though some are not */
1559 /* very meaningful for cciss. SG_IO is the main one people want. */
1560
1561 case SG_GET_VERSION_NUM:
1562 case SG_SET_TIMEOUT:
1563 case SG_GET_TIMEOUT:
1564 case SG_GET_RESERVED_SIZE:
1565 case SG_SET_RESERVED_SIZE:
1566 case SG_EMULATED_HOST:
1567 case SG_IO:
1568 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1569 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1570
1571 /* scsi_cmd_ioctl would normally handle these, below, but */
1572 /* they aren't a good fit for cciss, as CD-ROMs are */
1573 /* not supported, and we don't have any bus/target/lun */
1574 /* which we present to the kernel. */
1575
1576 case CDROM_SEND_PACKET:
1577 case CDROMCLOSETRAY:
1578 case CDROMEJECT:
1579 case SCSI_IOCTL_GET_IDLUN:
1580 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1581 default:
1582 return -ENOTTY;
1583 }
1da177e4
LT		 1584}
1585
7b30f092
JA		 1586static void cciss_check_queues(ctlr_info_t *h)
1587{
1588 int start_queue = h->next_to_run;
1589 int i;
1590
1591 /* check to see if we have maxed out the number of commands that can
1592 * be placed on the queue. If so then exit. We do this check here
1593 * in case the interrupt we serviced was from an ioctl and did not
1594 * free any new commands.
1595 */
f880632f 1596 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1597 return;
1598
1599 /* We have room on the queue for more commands. Now we need to queue
1600 * them up. We will also keep track of the next queue to run so
1601 * that every queue gets a chance to be started first.
1602 */
1603 for (i = 0; i < h->highest_lun + 1; i++) {
1604 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1605 /* make sure the disk has been added and the drive is real
1606 * because this can be called from the middle of init_one.
1607 */
1608 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1609 continue;
1610 blk_start_queue(h->gendisk[curr_queue]->queue);
1611
1612 /* check to see if we have maxed out the number of commands
1613 * that can be placed on the queue.
1614 */
f880632f 1615 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1616 if (curr_queue == start_queue) {
1617 h->next_to_run =
1618 (start_queue + 1) % (h->highest_lun + 1);
1619 break;
1620 } else {
1621 h->next_to_run = curr_queue;
1622 break;
1623 }
7b30f092
JA		 1624 }
1625 }
1626}
1627
ca1e0484
MM		 1628static void cciss_softirq_done(struct request *rq)
1629{
1630 CommandList_struct *cmd = rq->completion_data;
1631 ctlr_info_t *h = hba[cmd->ctlr];
1632 unsigned long flags;
1633 u64bit temp64;
1634 int i, ddir;
1635
1636 if (cmd->Request.Type.Direction == XFER_READ)
1637 ddir = PCI_DMA_FROMDEVICE;
1638 else
1639 ddir = PCI_DMA_TODEVICE;
1640
1641 /* command did not need to be retried */
1642 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1643 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1644 temp64.val32.lower = cmd->SG[i].Addr.lower;
1645 temp64.val32.upper = cmd->SG[i].Addr.upper;
1646 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1647 }
1648
ca1e0484
MM		 1649#ifdef CCISS_DEBUG
1650 printk("Done with %p\n", rq);
7c832835 1651#endif /* CCISS_DEBUG */
ca1e0484 1652
c3a4d78c 1653 /* set the residual count for pc requests */
ac44e5b2 1654 if (blk_pc_request(rq))
c3a4d78c 1655 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1656
c3a4d78c 1657 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1658
ca1e0484 1659 spin_lock_irqsave(&h->lock, flags);
7c832835 1660 cmd_free(h, cmd, 1);
7b30f092 1661 cciss_check_queues(h);
ca1e0484
MM		 1662 spin_unlock_irqrestore(&h->lock, flags);
1663}
1664
39ccf9a6
SC		 1665static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1666 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1667{
39ccf9a6
SC		 1668 memcpy(scsi3addr, h->drv[log_unit].LunID,
1669 sizeof(h->drv[log_unit].LunID));
b57695fe 1670}
1671
7fe06326
AP		 1672/* This function gets the SCSI vendor, model, and revision of a logical drive
1673 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1674 * they cannot be read.
1675 */
1676static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1677 char *vendor, char *model, char *rev)
1678{
1679 int rc;
1680 InquiryData_struct *inq_buf;
b57695fe 1681 unsigned char scsi3addr[8];
7fe06326
AP		 1682
1683 *vendor = '\0';
1684 *model = '\0';
1685 *rev = '\0';
1686
1687 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1688 if (!inq_buf)
1689 return;
1690
b57695fe 1691 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1692 if (withirq)
1693 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1694 sizeof(InquiryData_struct), 0,
1695 scsi3addr, TYPE_CMD);
7fe06326
AP		 1696 else
1697 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1698 sizeof(InquiryData_struct), 0,
1699 scsi3addr, TYPE_CMD);
7fe06326
AP		 1700 if (rc == IO_OK) {
1701 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1702 vendor[VENDOR_LEN] = '\0';
1703 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1704 model[MODEL_LEN] = '\0';
1705 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1706 rev[REV_LEN] = '\0';
1707 }
1708
1709 kfree(inq_buf);
1710 return;
1711}
1712
a72da29b
MM		 1713/* This function gets the serial number of a logical drive via
1714 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1715 * number cannot be had, for whatever reason, 16 bytes of 0xff
1716 * are returned instead.
1717 */
1718static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1719 unsigned char *serial_no, int buflen)
1720{
1721#define PAGE_83_INQ_BYTES 64
1722 int rc;
1723 unsigned char *buf;
b57695fe 1724 unsigned char scsi3addr[8];
a72da29b
MM		 1725
1726 if (buflen > 16)
1727 buflen = 16;
1728 memset(serial_no, 0xff, buflen);
1729 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1730 if (!buf)
1731 return;
1732 memset(serial_no, 0, buflen);
b57695fe 1733 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1734 if (withirq)
1735 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1736 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1737 else
1738 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1739 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1740 if (rc == IO_OK)
1741 memcpy(serial_no, &buf[8], buflen);
1742 kfree(buf);
1743 return;
1744}
1745
617e1344
SC		 1746/*
1747 * cciss_add_disk sets up the block device queue for a logical drive
1748 */
1749static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1750 int drv_index)
1751{
1752 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1753 if (!disk->queue)
1754 goto init_queue_failure;
6ae5ce8e
MM		 1755 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1756 disk->major = h->major;
1757 disk->first_minor = drv_index << NWD_SHIFT;
1758 disk->fops = &cciss_fops;
617e1344
SC		 1759 if (h->drv[drv_index].dev == NULL) {
1760 if (cciss_create_ld_sysfs_entry(h, drv_index))
1761 goto cleanup_queue;
1762 }
6ae5ce8e 1763 disk->private_data = &h->drv[drv_index];
617e1344 1764 disk->driverfs_dev = h->drv[drv_index].dev;
6ae5ce8e
MM		 1765
1766 /* Set up queue information */
1767 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1768
1769 /* This is a hardware imposed limit. */
1770 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1771
1772 /* This is a limit in the driver and could be eliminated. */
1773 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1774
1775 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1776
1777 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1778
1779 disk->queue->queuedata = h;
1780
e1defc4f
MP		 1781 blk_queue_logical_block_size(disk->queue,
1782 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1783
1784 /* Make sure all queue data is written out before */
1785 /* setting h->drv[drv_index].queue, as setting this */
1786 /* allows the interrupt handler to start the queue */
1787 wmb();
1788 h->drv[drv_index].queue = disk->queue;
1789 add_disk(disk);
617e1344
SC		 1790 return 0;
1791
1792cleanup_queue:
1793 blk_cleanup_queue(disk->queue);
1794 disk->queue = NULL;
e8074f79 1795init_queue_failure:
617e1344 1796 return -1;
6ae5ce8e
MM		 1797}
1798
ddd47442 1799/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1800 * If the usage_count is zero and it is a heretofore unknown drive, or,
1801 * the drive's capacity, geometry, or serial number has changed,
1802 * then the drive information will be updated and the disk will be
1803 * re-registered with the kernel. If these conditions don't hold,
1804 * then it will be left alone for the next reboot. The exception to this
1805 * is disk 0 which will always be left registered with the kernel since it
1806 * is also the controller node. Any changes to disk 0 will show up on
1807 * the next reboot.
7c832835 1808 */
2d11d993
SC		 1809static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1810 int via_ioctl)
7c832835 1811{
ddd47442
MM		 1812 ctlr_info_t *h = hba[ctlr];
1813 struct gendisk *disk;
ddd47442
MM		 1814 InquiryData_struct *inq_buff = NULL;
1815 unsigned int block_size;
00988a35 1816 sector_t total_size;
ddd47442
MM		 1817 unsigned long flags = 0;
1818 int ret = 0;
a72da29b
MM		 1819 drive_info_struct *drvinfo;
1820
1821 /* Get information about the disk and modify the driver structure */
1822 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1823 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1824 if (inq_buff == NULL || drvinfo == NULL)
1825 goto mem_msg;
1826
1827 /* testing to see if 16-byte CDBs are already being used */
1828 if (h->cciss_read == CCISS_READ_16) {
1829 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1830 &total_size, &block_size);
1831
1832 } else {
1833 cciss_read_capacity(ctlr, drv_index, 1,
1834 &total_size, &block_size);
1835
1836 /* if read_capacity returns all F's this volume is >2TB */
1837 /* in size so we switch to 16-byte CDB's for all */
1838 /* read/write ops */
1839 if (total_size == 0xFFFFFFFFULL) {
1840 cciss_read_capacity_16(ctlr, drv_index, 1,
1841 &total_size, &block_size);
1842 h->cciss_read = CCISS_READ_16;
1843 h->cciss_write = CCISS_WRITE_16;
1844 } else {
1845 h->cciss_read = CCISS_READ_10;
1846 h->cciss_write = CCISS_WRITE_10;
1847 }
1848 }
1849
1850 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1851 inq_buff, drvinfo);
1852 drvinfo->block_size = block_size;
1853 drvinfo->nr_blocks = total_size + 1;
1854
7fe06326
AP		 1855 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1856 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1857 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1858 sizeof(drvinfo->serial_no));
1859
1860 /* Is it the same disk we already know, and nothing's changed? */
1861 if (h->drv[drv_index].raid_level != -1 &&
1862 ((memcmp(drvinfo->serial_no,
1863 h->drv[drv_index].serial_no, 16) == 0) &&
1864 drvinfo->block_size == h->drv[drv_index].block_size &&
1865 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1866 drvinfo->heads == h->drv[drv_index].heads &&
1867 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1868 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1869 /* The disk is unchanged, nothing to update */
1870 goto freeret;
a72da29b 1871
6ae5ce8e
MM		 1872 /* If we get here it's not the same disk, or something's changed,
1873 * so we need to * deregister it, and re-register it, if it's not
1874 * in use.
1875 * If the disk already exists then deregister it before proceeding
1876 * (unless it's the first disk (for the controller node).
1877 */
a72da29b
MM		 1878 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1879 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1880 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1881 h->drv[drv_index].busy_configuring = 1;
1882 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1883
6ae5ce8e
MM		 1884 /* deregister_disk sets h->drv[drv_index].queue = NULL
1885 * which keeps the interrupt handler from starting
1886 * the queue.
1887 */
2d11d993 1888 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1889 h->drv[drv_index].busy_configuring = 0;
1890 }
1891
1892 /* If the disk is in use return */
1893 if (ret)
a72da29b
MM		 1894 goto freeret;
1895
6ae5ce8e
MM		 1896 /* Save the new information from cciss_geometry_inquiry
1897 * and serial number inquiry.
1898 */
a72da29b
MM		 1899 h->drv[drv_index].block_size = drvinfo->block_size;
1900 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1901 h->drv[drv_index].heads = drvinfo->heads;
1902 h->drv[drv_index].sectors = drvinfo->sectors;
1903 h->drv[drv_index].cylinders = drvinfo->cylinders;
1904 h->drv[drv_index].raid_level = drvinfo->raid_level;
1905 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1906 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1907 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1908 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1909
1910 ++h->num_luns;
1911 disk = h->gendisk[drv_index];
1912 set_capacity(disk, h->drv[drv_index].nr_blocks);
1913
6ae5ce8e
MM		 1914 /* If it's not disk 0 (drv_index != 0)
1915 * or if it was disk 0, but there was previously
1916 * no actual corresponding configured logical drive
1917 * (raid_leve == -1) then we want to update the
1918 * logical drive's information.
1919 */
361e9b07
SC		 1920 if (drv_index || first_time) {
1921 if (cciss_add_disk(h, disk, drv_index) != 0) {
1922 cciss_free_gendisk(h, drv_index);
1923 printk(KERN_WARNING "cciss:%d could not update "
1924 "disk %d\n", h->ctlr, drv_index);
1925 --h->num_luns;
1926 }
1927 }
ddd47442 1928
6ae5ce8e 1929freeret:
ddd47442 1930 kfree(inq_buff);
a72da29b 1931 kfree(drvinfo);
ddd47442 1932 return;
6ae5ce8e 1933mem_msg:
ddd47442
MM		 1934 printk(KERN_ERR "cciss: out of memory\n");
1935 goto freeret;
1936}
1937
1938/* This function will find the first index of the controllers drive array
1939 * that has a -1 for the raid_level and will return that index. This is
1940 * where new drives will be added. If the index to be returned is greater
1941 * than the highest_lun index for the controller then highest_lun is set
1942 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1943 * "controller_node" is used to know if this is a real logical drive, or just
1944 * the controller node, which determines if this counts towards highest_lun.
7c832835 1945 */
eece695f 1946static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1947{
1948 int i;
1949
7c832835
BH		 1950 for (i = 0; i < CISS_MAX_LUN; i++) {
1951 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1952 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1953 if (!controller_node)
1954 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1955 return i;
1956 }
1957 }
1958 return -1;
1959}
1960
361e9b07
SC		 1961static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
1962{
1963 put_disk(h->gendisk[drv_index]);
1964 h->gendisk[drv_index] = NULL;
1965}
1966
6ae5ce8e
MM		 1967/* cciss_add_gendisk finds a free hba[]->drv structure
1968 * and allocates a gendisk if needed, and sets the lunid
1969 * in the drvinfo structure. It returns the index into
1970 * the ->drv[] array, or -1 if none are free.
1971 * is_controller_node indicates whether highest_lun should
1972 * count this disk, or if it's only being added to provide
1973 * a means to talk to the controller in case no logical
1974 * drives have yet been configured.
1975 */
39ccf9a6
SC		 1976static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
1977 int controller_node)
6ae5ce8e
MM		 1978{
1979 int drv_index;
1980
eece695f 1981 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1982 if (drv_index == -1)
1983 return -1;
8ce51966 1984
6ae5ce8e
MM		 1985 /*Check if the gendisk needs to be allocated */
1986 if (!h->gendisk[drv_index]) {
1987 h->gendisk[drv_index] =
1988 alloc_disk(1 << NWD_SHIFT);
1989 if (!h->gendisk[drv_index]) {
1990 printk(KERN_ERR "cciss%d: could not "
1991 "allocate a new disk %d\n",
1992 h->ctlr, drv_index);
1993 return -1;
1994 }
1995 }
39ccf9a6
SC		 1996 memcpy(h->drv[drv_index].LunID, lunid,
1997 sizeof(h->drv[drv_index].LunID));
097d0264
SC		 1998 if (h->drv[drv_index].dev == NULL) {
1999 if (cciss_create_ld_sysfs_entry(h, drv_index))
2000 goto err_free_disk;
2001 }
6ae5ce8e
MM		 2002 /* Don't need to mark this busy because nobody */
2003 /* else knows about this disk yet to contend */
2004 /* for access to it. */
2005 h->drv[drv_index].busy_configuring = 0;
2006 wmb();
2007 return drv_index;
7fe06326
AP		 2008
2009err_free_disk:
361e9b07 2010 cciss_free_gendisk(h, drv_index);
7fe06326 2011 return -1;
6ae5ce8e
MM		 2012}
2013
2014/* This is for the special case of a controller which
2015 * has no logical drives. In this case, we still need
2016 * to register a disk so the controller can be accessed
2017 * by the Array Config Utility.
2018 */
2019static void cciss_add_controller_node(ctlr_info_t *h)
2020{
2021 struct gendisk *disk;
2022 int drv_index;
2023
2024 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2025 return;
2026
39ccf9a6 2027 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2028 if (drv_index == -1)
2029 goto error;
6ae5ce8e
MM		 2030 h->drv[drv_index].block_size = 512;
2031 h->drv[drv_index].nr_blocks = 0;
2032 h->drv[drv_index].heads = 0;
2033 h->drv[drv_index].sectors = 0;
2034 h->drv[drv_index].cylinders = 0;
2035 h->drv[drv_index].raid_level = -1;
2036 memset(h->drv[drv_index].serial_no, 0, 16);
2037 disk = h->gendisk[drv_index];
361e9b07
SC		 2038 if (cciss_add_disk(h, disk, drv_index) == 0)
2039 return;
2040 cciss_free_gendisk(h, drv_index);
2041error:
2042 printk(KERN_WARNING "cciss%d: could not "
2043 "add disk 0.\n", h->ctlr);
2044 return;
6ae5ce8e
MM		 2045}
2046
ddd47442 2047/* This function will add and remove logical drives from the Logical
d14c4ab5 2048 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2049 * so that mount points are preserved until the next reboot. This allows
2050 * for the removal of logical drives in the middle of the drive array
2051 * without a re-ordering of those drives.
2052 * INPUT
2053 * h = The controller to perform the operations on
7c832835 2054 */
2d11d993
SC		 2055static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2056 int via_ioctl)
1da177e4 2057{
ddd47442
MM		 2058 int ctlr = h->ctlr;
2059 int num_luns;
2060 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2061 int return_code;
2062 int listlength = 0;
2063 int i;
2064 int drv_found;
2065 int drv_index = 0;
39ccf9a6 2066 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2067 unsigned long flags;
ddd47442 2068
6ae5ce8e
MM		 2069 if (!capable(CAP_SYS_RAWIO))
2070 return -EPERM;
2071
ddd47442
MM		 2072 /* Set busy_configuring flag for this operation */
2073 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2074 if (h->busy_configuring) {
ddd47442
MM		 2075 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2076 return -EBUSY;
2077 }
2078 h->busy_configuring = 1;
a72da29b 2079 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2080
a72da29b
MM		 2081 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2082 if (ld_buff == NULL)
2083 goto mem_msg;
2084
2085 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2086 sizeof(ReportLunData_struct),
2087 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2088
a72da29b
MM		 2089 if (return_code == IO_OK)
2090 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2091 else { /* reading number of logical volumes failed */
2092 printk(KERN_WARNING "cciss: report logical volume"
2093 " command failed\n");
2094 listlength = 0;
2095 goto freeret;
2096 }
2097
2098 num_luns = listlength / 8; /* 8 bytes per entry */
2099 if (num_luns > CISS_MAX_LUN) {
2100 num_luns = CISS_MAX_LUN;
2101 printk(KERN_WARNING "cciss: more luns configured"
2102 " on controller than can be handled by"
2103 " this driver.\n");
2104 }
2105
6ae5ce8e
MM		 2106 if (num_luns == 0)
2107 cciss_add_controller_node(h);
2108
2109 /* Compare controller drive array to driver's drive array
2110 * to see if any drives are missing on the controller due
2111 * to action of Array Config Utility (user deletes drive)
2112 * and deregister logical drives which have disappeared.
2113 */
a72da29b
MM		 2114 for (i = 0; i <= h->highest_lun; i++) {
2115 int j;
2116 drv_found = 0;
d8a0be6a
SC		 2117
2118 /* skip holes in the array from already deleted drives */
2119 if (h->drv[i].raid_level == -1)
2120 continue;
2121
a72da29b 2122 for (j = 0; j < num_luns; j++) {
39ccf9a6
SC		 2123 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2124 if (memcmp(h->drv[i].LunID, lunid,
2125 sizeof(lunid)) == 0) {
a72da29b
MM		 2126 drv_found = 1;
2127 break;
2128 }
2129 }
2130 if (!drv_found) {
2131 /* Deregister it from the OS, it's gone. */
2132 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2133 h->drv[i].busy_configuring = 1;
2134 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2135 return_code = deregister_disk(h, i, 1, via_ioctl);
a72da29b 2136 h->drv[i].busy_configuring = 0;
ddd47442 2137 }
a72da29b 2138 }
ddd47442 2139
a72da29b
MM		 2140 /* Compare controller drive array to driver's drive array.
2141 * Check for updates in the drive information and any new drives
2142 * on the controller due to ACU adding logical drives, or changing
2143 * a logical drive's size, etc. Reregister any new/changed drives
2144 */
2145 for (i = 0; i < num_luns; i++) {
2146 int j;
ddd47442 2147
a72da29b 2148 drv_found = 0;
ddd47442 2149
39ccf9a6 2150 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2151 /* Find if the LUN is already in the drive array
2152 * of the driver. If so then update its info
2153 * if not in use. If it does not exist then find
2154 * the first free index and add it.
2155 */
2156 for (j = 0; j <= h->highest_lun; j++) {
2157 if (h->drv[j].raid_level != -1 &&
39ccf9a6
SC		 2158 memcmp(h->drv[j].LunID, lunid,
2159 sizeof(h->drv[j].LunID)) == 0) {
a72da29b
MM		 2160 drv_index = j;
2161 drv_found = 1;
2162 break;
ddd47442 2163 }
a72da29b 2164 }
ddd47442 2165
a72da29b
MM		 2166 /* check if the drive was found already in the array */
2167 if (!drv_found) {
eece695f 2168 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2169 if (drv_index == -1)
2170 goto freeret;
a72da29b 2171 }
2d11d993
SC		 2172 cciss_update_drive_info(ctlr, drv_index, first_time,
2173 via_ioctl);
a72da29b 2174 } /* end for */
ddd47442 2175
6ae5ce8e 2176freeret:
ddd47442
MM		 2177 kfree(ld_buff);
2178 h->busy_configuring = 0;
2179 /* We return -1 here to tell the ACU that we have registered/updated
2180 * all of the drives that we can and to keep it from calling us
2181 * additional times.
7c832835 2182 */
ddd47442 2183 return -1;
6ae5ce8e 2184mem_msg:
ddd47442 2185 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2186 h->busy_configuring = 0;
ddd47442
MM		 2187 goto freeret;
2188}
2189
9ddb27b4
SC		 2190static void cciss_clear_drive_info(drive_info_struct *drive_info)
2191{
2192 /* zero out the disk size info */
2193 drive_info->nr_blocks = 0;
2194 drive_info->block_size = 0;
2195 drive_info->heads = 0;
2196 drive_info->sectors = 0;
2197 drive_info->cylinders = 0;
2198 drive_info->raid_level = -1;
2199 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2200 memset(drive_info->model, 0, sizeof(drive_info->model));
2201 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2202 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2203 /*
2204 * don't clear the LUNID though, we need to remember which
2205 * one this one is.
2206 */
2207}
2208
ddd47442
MM		 2209/* This function will deregister the disk and it's queue from the
2210 * kernel. It must be called with the controller lock held and the
2211 * drv structures busy_configuring flag set. It's parameters are:
2212 *
2213 * disk = This is the disk to be deregistered
2214 * drv = This is the drive_info_struct associated with the disk to be
2215 * deregistered. It contains information about the disk used
2216 * by the driver.
2217 * clear_all = This flag determines whether or not the disk information
2218 * is going to be completely cleared out and the highest_lun
2219 * reset. Sometimes we want to clear out information about
d14c4ab5 2220 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2221 * the highest_lun should be left unchanged and the LunID
2222 * should not be cleared.
2d11d993
SC		 2223 * via_ioctl
2224 * This indicates whether we've reached this path via ioctl.
2225 * This affects the maximum usage count allowed for c0d0 to be messed with.
2226 * If this path is reached via ioctl(), then the max_usage_count will
2227 * be 1, as the process calling ioctl() has got to have the device open.
2228 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2229*/
a0ea8622 2230static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2231 int clear_all, int via_ioctl)
ddd47442 2232{
799202cb 2233 int i;
a0ea8622
SC		 2234 struct gendisk *disk;
2235 drive_info_struct *drv;
1da177e4
LT		 2236
2237 if (!capable(CAP_SYS_RAWIO))
2238 return -EPERM;
2239
a0ea8622
SC		 2240 drv = &h->drv[drv_index];
2241 disk = h->gendisk[drv_index];
2242
1da177e4 2243 /* make sure logical volume is NOT is use */
7c832835 2244 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2245 if (drv->usage_count > via_ioctl)
7c832835
BH		 2246 return -EBUSY;
2247 } else if (drv->usage_count > 0)
2248 return -EBUSY;
1da177e4 2249
ddd47442
MM		 2250 /* invalidate the devices and deregister the disk. If it is disk
2251 * zero do not deregister it but just zero out it's values. This
2252 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2253 */
2254 if (h->gendisk[0] != disk) {
5a9df732 2255 struct request_queue *q = disk->queue;
097d0264 2256 if (disk->flags & GENHD_FL_UP) {
8ce51966 2257 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2258 del_gendisk(disk);
097d0264 2259 }
5a9df732
AB		 2260 if (q) {
2261 blk_cleanup_queue(q);
2262 /* Set drv->queue to NULL so that we do not try
2263 * to call blk_start_queue on this queue in the
2264 * interrupt handler
2265 */
2266 drv->queue = NULL;
2267 }
2268 /* If clear_all is set then we are deleting the logical
2269 * drive, not just refreshing its info. For drives
2270 * other than disk 0 we will call put_disk. We do not
2271 * do this for disk 0 as we need it to be able to
2272 * configure the controller.
a72da29b 2273 */
5a9df732
AB		 2274 if (clear_all){
2275 /* This isn't pretty, but we need to find the
2276 * disk in our array and NULL our the pointer.
2277 * This is so that we will call alloc_disk if
2278 * this index is used again later.
a72da29b 2279 */
5a9df732 2280 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2281 if (h->gendisk[i] == disk) {
5a9df732
AB		 2282 h->gendisk[i] = NULL;
2283 break;
799202cb 2284 }
799202cb 2285 }
5a9df732 2286 put_disk(disk);
ddd47442 2287 }
799202cb
MM		 2288 } else {
2289 set_capacity(disk, 0);
ddd47442
MM		 2290 }
2291
2292 --h->num_luns;
9ddb27b4
SC		 2293 cciss_clear_drive_info(drv);
2294
7c832835
BH		 2295 if (clear_all) {
2296 /* check to see if it was the last disk */
2297 if (drv == h->drv + h->highest_lun) {
2298 /* if so, find the new hightest lun */
2299 int i, newhighest = -1;
a72da29b 2300 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2301 /* if the disk has size > 0, it is available */
ddd47442 2302 if (h->drv[i].heads)
7c832835
BH		 2303 newhighest = i;
2304 }
2305 h->highest_lun = newhighest;
1da177e4 2306 }
39ccf9a6 2307 memset(drv->LunID, 0, sizeof(drv->LunID));
ddd47442 2308 }
e2019b58 2309 return 0;
1da177e4 2310}
ddd47442 2311
b57695fe 2312static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2313 size_t size, __u8 page_code, unsigned char *scsi3addr,
2314 int cmd_type)
1da177e4 2315{
7c832835 2316 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2317 u64bit buff_dma_handle;
2318 int status = IO_OK;
2319
2320 c->cmd_type = CMD_IOCTL_PEND;
2321 c->Header.ReplyQueue = 0;
7c832835 2322 if (buff != NULL) {
1da177e4 2323 c->Header.SGList = 1;
7c832835 2324 c->Header.SGTotal = 1;
1da177e4
LT		 2325 } else {
2326 c->Header.SGList = 0;
7c832835 2327 c->Header.SGTotal = 0;
1da177e4
LT		 2328 }
2329 c->Header.Tag.lower = c->busaddr;
b57695fe 2330 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2331
2332 c->Request.Type.Type = cmd_type;
2333 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2334 switch (cmd) {
2335 case CISS_INQUIRY:
1da177e4 2336 /* are we trying to read a vital product page */
7c832835 2337 if (page_code != 0) {
1da177e4
LT		 2338 c->Request.CDB[1] = 0x01;
2339 c->Request.CDB[2] = page_code;
2340 }
2341 c->Request.CDBLen = 6;
7c832835 2342 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2343 c->Request.Type.Direction = XFER_READ;
2344 c->Request.Timeout = 0;
7c832835
BH		 2345 c->Request.CDB[0] = CISS_INQUIRY;
2346 c->Request.CDB[4] = size & 0xFF;
2347 break;
1da177e4
LT		 2348 case CISS_REPORT_LOG:
2349 case CISS_REPORT_PHYS:
7c832835 2350 /* Talking to controller so It's a physical command
1da177e4 2351 mode = 00 target = 0. Nothing to write.
7c832835 2352 */
1da177e4
LT		 2353 c->Request.CDBLen = 12;
2354 c->Request.Type.Attribute = ATTR_SIMPLE;
2355 c->Request.Type.Direction = XFER_READ;
2356 c->Request.Timeout = 0;
2357 c->Request.CDB[0] = cmd;
7c832835 2358 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2359 c->Request.CDB[7] = (size >> 16) & 0xFF;
2360 c->Request.CDB[8] = (size >> 8) & 0xFF;
2361 c->Request.CDB[9] = size & 0xFF;
2362 break;
2363
2364 case CCISS_READ_CAPACITY:
1da177e4
LT		 2365 c->Request.CDBLen = 10;
2366 c->Request.Type.Attribute = ATTR_SIMPLE;
2367 c->Request.Type.Direction = XFER_READ;
2368 c->Request.Timeout = 0;
2369 c->Request.CDB[0] = cmd;
7c832835 2370 break;
00988a35 2371 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2372 c->Request.CDBLen = 16;
2373 c->Request.Type.Attribute = ATTR_SIMPLE;
2374 c->Request.Type.Direction = XFER_READ;
2375 c->Request.Timeout = 0;
2376 c->Request.CDB[0] = cmd;
2377 c->Request.CDB[1] = 0x10;
2378 c->Request.CDB[10] = (size >> 24) & 0xFF;
2379 c->Request.CDB[11] = (size >> 16) & 0xFF;
2380 c->Request.CDB[12] = (size >> 8) & 0xFF;
2381 c->Request.CDB[13] = size & 0xFF;
2382 c->Request.Timeout = 0;
2383 c->Request.CDB[0] = cmd;
2384 break;
1da177e4
LT		 2385 case CCISS_CACHE_FLUSH:
2386 c->Request.CDBLen = 12;
2387 c->Request.Type.Attribute = ATTR_SIMPLE;
2388 c->Request.Type.Direction = XFER_WRITE;
2389 c->Request.Timeout = 0;
2390 c->Request.CDB[0] = BMIC_WRITE;
2391 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2392 break;
88f627ae 2393 case TEST_UNIT_READY:
88f627ae
SC		 2394 c->Request.CDBLen = 6;
2395 c->Request.Type.Attribute = ATTR_SIMPLE;
2396 c->Request.Type.Direction = XFER_NONE;
2397 c->Request.Timeout = 0;
2398 break;
1da177e4
LT		 2399 default:
2400 printk(KERN_WARNING
7c832835 2401 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2402 return IO_ERROR;
1da177e4
LT		 2403 }
2404 } else if (cmd_type == TYPE_MSG) {
2405 switch (cmd) {
7c832835 2406 case 0: /* ABORT message */
3da8b713 2407 c->Request.CDBLen = 12;
2408 c->Request.Type.Attribute = ATTR_SIMPLE;
2409 c->Request.Type.Direction = XFER_WRITE;
2410 c->Request.Timeout = 0;
7c832835
BH		 2411 c->Request.CDB[0] = cmd; /* abort */
2412 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2413 /* buff contains the tag of the command to abort */
2414 memcpy(&c->Request.CDB[4], buff, 8);
2415 break;
7c832835 2416 case 1: /* RESET message */
88f627ae 2417 c->Request.CDBLen = 16;
3da8b713 2418 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2419 c->Request.Type.Direction = XFER_NONE;
3da8b713 2420 c->Request.Timeout = 0;
2421 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2422 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2423 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2424 break;
1da177e4
LT		 2425 case 3: /* No-Op message */
2426 c->Request.CDBLen = 1;
2427 c->Request.Type.Attribute = ATTR_SIMPLE;
2428 c->Request.Type.Direction = XFER_WRITE;
2429 c->Request.Timeout = 0;
2430 c->Request.CDB[0] = cmd;
2431 break;
2432 default:
2433 printk(KERN_WARNING
7c832835 2434 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2435 return IO_ERROR;
2436 }
2437 } else {
2438 printk(KERN_WARNING
7c832835 2439 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2440 return IO_ERROR;
2441 }
2442 /* Fill in the scatter gather information */
2443 if (size > 0) {
2444 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2445 buff, size,
2446 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2447 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2448 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2449 c->SG[0].Len = size;
7c832835 2450 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2451 }
2452 return status;
2453}
7c832835 2454
3c2ab402 2455static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2456{
2457 switch (c->err_info->ScsiStatus) {
2458 case SAM_STAT_GOOD:
2459 return IO_OK;
2460 case SAM_STAT_CHECK_CONDITION:
2461 switch (0xf & c->err_info->SenseInfo[2]) {
2462 case 0: return IO_OK; /* no sense */
2463 case 1: return IO_OK; /* recovered error */
2464 default:
2465 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2466 "check condition, sense key = 0x%02x\n",
2467 h->ctlr, c->Request.CDB[0],
2468 c->err_info->SenseInfo[2]);
2469 }
2470 break;
2471 default:
2472 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2473 "scsi status = 0x%02x\n", h->ctlr,
2474 c->Request.CDB[0], c->err_info->ScsiStatus);
2475 break;
2476 }
2477 return IO_ERROR;
2478}
2479
789a424a 2480static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2481{
5390cfc3 2482 int return_status = IO_OK;
7c832835 2483
789a424a 2484 if (c->err_info->CommandStatus == CMD_SUCCESS)
2485 return IO_OK;
5390cfc3 2486
2487 switch (c->err_info->CommandStatus) {
2488 case CMD_TARGET_STATUS:
3c2ab402 2489 return_status = check_target_status(h, c);
5390cfc3 2490 break;
2491 case CMD_DATA_UNDERRUN:
2492 case CMD_DATA_OVERRUN:
2493 /* expected for inquiry and report lun commands */
2494 break;
2495 case CMD_INVALID:
789a424a 2496 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2497 "reported invalid\n", c->Request.CDB[0]);
2498 return_status = IO_ERROR;
2499 break;
2500 case CMD_PROTOCOL_ERR:
2501 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2502 "protocol error \n", c->Request.CDB[0]);
2503 return_status = IO_ERROR;
2504 break;
2505 case CMD_HARDWARE_ERR:
2506 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2507 " hardware error\n", c->Request.CDB[0]);
2508 return_status = IO_ERROR;
2509 break;
2510 case CMD_CONNECTION_LOST:
2511 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2512 "connection lost\n", c->Request.CDB[0]);
2513 return_status = IO_ERROR;
2514 break;
2515 case CMD_ABORTED:
2516 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2517 "aborted\n", c->Request.CDB[0]);
2518 return_status = IO_ERROR;
2519 break;
2520 case CMD_ABORT_FAILED:
2521 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2522 "abort failed\n", c->Request.CDB[0]);
2523 return_status = IO_ERROR;
2524 break;
2525 case CMD_UNSOLICITED_ABORT:
2526 printk(KERN_WARNING
2527 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2528 c->Request.CDB[0]);
789a424a 2529 return_status = IO_NEEDS_RETRY;
5390cfc3 2530 break;
2531 default:
2532 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2533 "unknown status %x\n", c->Request.CDB[0],
2534 c->err_info->CommandStatus);
2535 return_status = IO_ERROR;
7c832835 2536 }
789a424a 2537 return return_status;
2538}
2539
2540static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2541 int attempt_retry)
2542{
2543 DECLARE_COMPLETION_ONSTACK(wait);
2544 u64bit buff_dma_handle;
2545 unsigned long flags;
2546 int return_status = IO_OK;
2547
2548resend_cmd2:
2549 c->waiting = &wait;
2550 /* Put the request on the tail of the queue and send it */
2551 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2552 addQ(&h->reqQ, c);
2553 h->Qdepth++;
2554 start_io(h);
2555 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2556
2557 wait_for_completion(&wait);
2558
2559 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2560 goto command_done;
2561
2562 return_status = process_sendcmd_error(h, c);
2563
2564 if (return_status == IO_NEEDS_RETRY &&
2565 c->retry_count < MAX_CMD_RETRIES) {
2566 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2567 c->Request.CDB[0]);
2568 c->retry_count++;
2569 /* erase the old error information */
2570 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2571 return_status = IO_OK;
2572 INIT_COMPLETION(wait);
2573 goto resend_cmd2;
2574 }
5390cfc3 2575
2576command_done:
1da177e4 2577 /* unlock the buffers from DMA */
bb2a37bf
MM		 2578 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2579 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2580 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2581 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2582 return return_status;
2583}
2584
b57695fe 2585static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2586 __u8 page_code, unsigned char scsi3addr[],
2587 int cmd_type)
5390cfc3 2588{
2589 ctlr_info_t *h = hba[ctlr];
2590 CommandList_struct *c;
2591 int return_status;
2592
2593 c = cmd_alloc(h, 0);
2594 if (!c)
2595 return -ENOMEM;
b57695fe 2596 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2597 scsi3addr, cmd_type);
5390cfc3 2598 if (return_status == IO_OK)
789a424a 2599 return_status = sendcmd_withirq_core(h, c, 1);
2600
1da177e4 2601 cmd_free(h, c, 0);
7c832835 2602 return return_status;
1da177e4 2603}
7c832835 2604
1da177e4 2605static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2606 int withirq, sector_t total_size,
7c832835
BH		 2607 unsigned int block_size,
2608 InquiryData_struct *inq_buff,
2609 drive_info_struct *drv)
1da177e4
LT		 2610{
2611 int return_code;
00988a35 2612 unsigned long t;
b57695fe 2613 unsigned char scsi3addr[8];
00988a35 2614
1da177e4 2615 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2616 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2617 if (withirq)
2618 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2619 inq_buff, sizeof(*inq_buff),
2620 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2621 else
2622 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2623 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2624 TYPE_CMD);
1da177e4 2625 if (return_code == IO_OK) {
7c832835 2626 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2627 printk(KERN_WARNING
7c832835
BH		 2628 "cciss: reading geometry failed, volume "
2629 "does not support reading geometry\n");
1da177e4 2630 drv->heads = 255;
7c832835 2631 drv->sectors = 32; // Sectors per track
7f42d3b8 2632 drv->cylinders = total_size + 1;
89f97ad1 2633 drv->raid_level = RAID_UNKNOWN;
1da177e4 2634 } else {
1da177e4
LT		 2635 drv->heads = inq_buff->data_byte[6];
2636 drv->sectors = inq_buff->data_byte[7];
2637 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2638 drv->cylinders += inq_buff->data_byte[5];
2639 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2640 }
2641 drv->block_size = block_size;
97c06978 2642 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2643 t = drv->heads * drv->sectors;
2644 if (t > 1) {
97c06978
MMOD		 2645 sector_t real_size = total_size + 1;
2646 unsigned long rem = sector_div(real_size, t);
3f7705ea 2647 if (rem)
97c06978
MMOD		 2648 real_size++;
2649 drv->cylinders = real_size;
1da177e4 2650 }
7c832835 2651 } else { /* Get geometry failed */
1da177e4
LT		 2652 printk(KERN_WARNING "cciss: reading geometry failed\n");
2653 }
1da177e4 2654}
7c832835 2655
1da177e4 2656static void
00988a35 2657cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2658 unsigned int *block_size)
1da177e4 2659{
00988a35 2660 ReadCapdata_struct *buf;
1da177e4 2661 int return_code;
b57695fe 2662 unsigned char scsi3addr[8];
1aebe187
MK		 2663
2664 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2665 if (!buf) {
00988a35
MMOD		 2666 printk(KERN_WARNING "cciss: out of memory\n");
2667 return;
2668 }
1aebe187 2669
b57695fe 2670 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2671 if (withirq)
2672 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2673 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2674 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2675 else
2676 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2677 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2678 0, scsi3addr, TYPE_CMD);
1da177e4 2679 if (return_code == IO_OK) {
4c1f2b31
AV		 2680 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2681 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2682 } else { /* read capacity command failed */
1da177e4
LT		 2683 printk(KERN_WARNING "cciss: read capacity failed\n");
2684 *total_size = 0;
2685 *block_size = BLOCK_SIZE;
2686 }
00988a35 2687 kfree(buf);
00988a35
MMOD		 2688}
2689
2690static void
2691cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2692{
2693 ReadCapdata_struct_16 *buf;
2694 int return_code;
b57695fe 2695 unsigned char scsi3addr[8];
1aebe187
MK		 2696
2697 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2698 if (!buf) {
00988a35
MMOD		 2699 printk(KERN_WARNING "cciss: out of memory\n");
2700 return;
2701 }
1aebe187 2702
b57695fe 2703 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2704 if (withirq) {
2705 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2706 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2707 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2708 }
2709 else {
2710 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2711 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2712 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2713 }
2714 if (return_code == IO_OK) {
4c1f2b31
AV		 2715 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2716 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2717 } else { /* read capacity command failed */
2718 printk(KERN_WARNING "cciss: read capacity failed\n");
2719 *total_size = 0;
2720 *block_size = BLOCK_SIZE;
2721 }
7b92aadf 2722 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2723 (unsigned long long)*total_size+1, *block_size);
00988a35 2724 kfree(buf);
1da177e4
LT		 2725}
2726
1da177e4
LT		 2727static int cciss_revalidate(struct gendisk *disk)
2728{
2729 ctlr_info_t *h = get_host(disk);
2730 drive_info_struct *drv = get_drv(disk);
2731 int logvol;
7c832835 2732 int FOUND = 0;
1da177e4 2733 unsigned int block_size;
00988a35 2734 sector_t total_size;
1da177e4
LT		 2735 InquiryData_struct *inq_buff = NULL;
2736
7c832835 2737 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
39ccf9a6
SC		 2738 if (memcmp(h->drv[logvol].LunID, drv->LunID,
2739 sizeof(drv->LunID)) == 0) {
7c832835 2740 FOUND = 1;
1da177e4
LT		 2741 break;
2742 }
2743 }
2744
7c832835
BH		 2745 if (!FOUND)
2746 return 1;
1da177e4 2747
7c832835
BH		 2748 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2749 if (inq_buff == NULL) {
2750 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2751 return 1;
2752 }
00988a35
MMOD		 2753 if (h->cciss_read == CCISS_READ_10) {
2754 cciss_read_capacity(h->ctlr, logvol, 1,
2755 &total_size, &block_size);
2756 } else {
2757 cciss_read_capacity_16(h->ctlr, logvol, 1,
2758 &total_size, &block_size);
2759 }
7c832835
BH		 2760 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2761 inq_buff, drv);
1da177e4 2762
e1defc4f 2763 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2764 set_capacity(disk, drv->nr_blocks);
2765
1da177e4
LT		 2766 kfree(inq_buff);
2767 return 0;
2768}
2769
2770/*
2771 * Wait polling for a command to complete.
2772 * The memory mapped FIFO is polled for the completion.
2773 * Used only at init time, interrupts from the HBA are disabled.
2774 */
2775static unsigned long pollcomplete(int ctlr)
2776{
2777 unsigned long done;
2778 int i;
2779
2780 /* Wait (up to 20 seconds) for a command to complete */
2781
2782 for (i = 20 * HZ; i > 0; i--) {
2783 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2784 if (done == FIFO_EMPTY)
2785 schedule_timeout_uninterruptible(1);
2786 else
e2019b58 2787 return done;
1da177e4
LT		 2788 }
2789 /* Invalid address to tell caller we ran out of time */
2790 return 1;
2791}
3da8b713 2792
4a4b2d76
SC		 2793/* Send command c to controller h and poll for it to complete.
2794 * Turns interrupts off on the board. Used at driver init time
2795 * and during SCSI error recovery.
1da177e4 2796 */
4a4b2d76 2797static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2798{
1da177e4
LT		 2799 int i;
2800 unsigned long complete;
4a4b2d76 2801 int status = IO_ERROR;
1da177e4 2802 u64bit buff_dma_handle;
1da177e4 2803
4a4b2d76
SC		 2804resend_cmd1:
2805
2806 /* Disable interrupt on the board. */
2807 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2808
1da177e4 2809 /* Make sure there is room in the command FIFO */
7c832835 2810 /* Actually it should be completely empty at this time */
3da8b713 2811 /* unless we are in here doing error handling for the scsi */
2812 /* tape side of the driver. */
7c832835 2813 for (i = 200000; i > 0; i--) {
1da177e4 2814 /* if fifo isn't full go */
4a4b2d76 2815 if (!(h->access.fifo_full(h)))
7c832835 2816 break;
7c832835
BH		 2817 udelay(10);
2818 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2819 " waiting!\n", h->ctlr);
7c832835 2820 }
4a4b2d76 2821 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2822 do {
4a4b2d76 2823 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2824
2825#ifdef CCISS_DEBUG
3da8b713 2826 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2827#endif /* CCISS_DEBUG */
1da177e4 2828
3da8b713 2829 if (complete == 1) {
7c832835
BH		 2830 printk(KERN_WARNING
2831 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2832 "No command list address returned!\n", h->ctlr);
3da8b713 2833 status = IO_ERROR;
3da8b713 2834 break;
2835 }
2836
72f9f132 2837 /* Make sure it's the command we're expecting. */
4a4b2d76 2838 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2839 printk(KERN_WARNING "cciss%d: Unexpected command "
2840 "completion.\n", h->ctlr);
4a4b2d76
SC		 2841 continue;
2842 }
2843
2844 /* It is our command. If no error, we're done. */
2845 if (!(complete & CISS_ERROR_BIT)) {
2846 status = IO_OK;
2847 break;
2848 }
2849
2850 /* There is an error... */
2851
2852 /* if data overrun or underun on Report command ignore it */
2853 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2854 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2855 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2856 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2857 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2858 complete = c->busaddr;
2859 status = IO_OK;
2860 break;
1da177e4 2861 }
4a4b2d76
SC		 2862
2863 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2864 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2865 h->ctlr, c);
2866 if (c->retry_count < MAX_CMD_RETRIES) {
2867 printk(KERN_WARNING "cciss%d: retrying %p\n",
2868 h->ctlr, c);
2869 c->retry_count++;
2870 /* erase the old error information */
2871 memset(c->err_info, 0, sizeof(c->err_info));
2872 goto resend_cmd1;
3da8b713 2873 }
4a4b2d76
SC		 2874 printk(KERN_WARNING "cciss%d: retried %p too many "
2875 "times\n", h->ctlr, c);
2876 status = IO_ERROR;
3c2ab402 2877 break;
4a4b2d76
SC		 2878 }
2879
2880 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2881 printk(KERN_WARNING "cciss%d: command could not be "
2882 "aborted.\n", h->ctlr);
2883 status = IO_ERROR;
3c2ab402 2884 break;
4a4b2d76
SC		 2885 }
2886
4a4b2d76 2887 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2888 status = check_target_status(h, c);
2889 break;
4a4b2d76
SC		 2890 }
2891
3c2ab402 2892 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2893 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2894 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2895 status = IO_ERROR;
3c2ab402 2896 break;
4a4b2d76
SC		 2897
2898 } while (1);
7c832835 2899
1da177e4 2900 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2901 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2902 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2903 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2904 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2905 return status;
2906}
2907
2908/*
2909 * Send a command to the controller, and wait for it to complete.
2910 * Used at init time, and during SCSI error recovery.
2911 */
2912static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2913 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2914{
2915 CommandList_struct *c;
2916 int status;
2917
2918 c = cmd_alloc(hba[ctlr], 1);
2919 if (!c) {
2920 printk(KERN_WARNING "cciss: unable to get memory");
2921 return IO_ERROR;
2922 }
b57695fe 2923 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2924 scsi3addr, cmd_type);
4a4b2d76
SC		 2925 if (status == IO_OK)
2926 status = sendcmd_core(hba[ctlr], c);
2927 cmd_free(hba[ctlr], c, 1);
e2019b58 2928 return status;
7c832835
BH		 2929}
2930
1da177e4
LT		 2931/*
2932 * Map (physical) PCI mem into (virtual) kernel space
2933 */
2934static void __iomem *remap_pci_mem(ulong base, ulong size)
2935{
7c832835
BH		 2936 ulong page_base = ((ulong) base) & PAGE_MASK;
2937 ulong page_offs = ((ulong) base) - page_base;
2938 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2939
7c832835 2940 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2941}
2942
7c832835
BH		 2943/*
2944 * Takes jobs of the Q and sends them to the hardware, then puts it on
2945 * the Q to wait for completion.
2946 */
2947static void start_io(ctlr_info_t *h)
1da177e4
LT		 2948{
2949 CommandList_struct *c;
7c832835 2950
8a3173de
JA		 2951 while (!hlist_empty(&h->reqQ)) {
2952 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2953 /* can't do anything if fifo is full */
2954 if ((h->access.fifo_full(h))) {
2955 printk(KERN_WARNING "cciss: fifo full\n");
2956 break;
2957 }
2958
7c832835 2959 /* Get the first entry from the Request Q */
8a3173de 2960 removeQ(c);
1da177e4 2961 h->Qdepth--;
7c832835
BH		 2962
2963 /* Tell the controller execute command */
1da177e4 2964 h->access.submit_command(h, c);
7c832835
BH		 2965
2966 /* Put job onto the completed Q */
8a3173de 2967 addQ(&h->cmpQ, c);
1da177e4
LT		 2968 }
2969}
7c832835 2970
1da177e4
LT		 2971/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2972/* Zeros out the error record and then resends the command back */
2973/* to the controller */
7c832835 2974static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2975{
2976 /* erase the old error information */
2977 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2978
2979 /* add it to software queue and then send it to the controller */
8a3173de 2980 addQ(&h->reqQ, c);
1da177e4 2981 h->Qdepth++;
7c832835 2982 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2983 h->maxQsinceinit = h->Qdepth;
2984
2985 start_io(h);
2986}
a9925a06 2987
1a614f50
SC		 2988static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2989 unsigned int msg_byte, unsigned int host_byte,
2990 unsigned int driver_byte)
2991{
2992 /* inverse of macros in scsi.h */
2993 return (scsi_status_byte & 0xff) |
2994 ((msg_byte & 0xff) << 8) |
2995 ((host_byte & 0xff) << 16) |
2996 ((driver_byte & 0xff) << 24);
2997}
2998
0a9279cc
MM		 2999static inline int evaluate_target_status(ctlr_info_t *h,
3000 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 3001{
3002 unsigned char sense_key;
1a614f50
SC		 3003 unsigned char status_byte, msg_byte, host_byte, driver_byte;
3004 int error_value;
3005
0a9279cc 3006 *retry_cmd = 0;
1a614f50
SC		 3007 /* If we get in here, it means we got "target status", that is, scsi status */
3008 status_byte = cmd->err_info->ScsiStatus;
3009 driver_byte = DRIVER_OK;
3010 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
3011
3012 if (blk_pc_request(cmd->rq))
3013 host_byte = DID_PASSTHROUGH;
3014 else
3015 host_byte = DID_OK;
3016
3017 error_value = make_status_bytes(status_byte, msg_byte,
3018 host_byte, driver_byte);
03bbfee5 3019
1a614f50 3020 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 3021 if (!blk_pc_request(cmd->rq))
3022 printk(KERN_WARNING "cciss: cmd %p "
3023 "has SCSI Status 0x%x\n",
3024 cmd, cmd->err_info->ScsiStatus);
1a614f50 3025 return error_value;
03bbfee5
MMOD		 3026 }
3027
3028 /* check the sense key */
3029 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3030 /* no status or recovered error */
1a614f50
SC		 3031 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
3032 error_value = 0;
03bbfee5 3033
0a9279cc
MM		 3034 if (check_for_unit_attention(h, cmd)) {
3035 *retry_cmd = !blk_pc_request(cmd->rq);
3036 return 0;
3037 }
3038
03bbfee5 3039 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 3040 if (error_value != 0)
03bbfee5
MMOD		 3041 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3042 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3043 return error_value;
03bbfee5
MMOD		 3044 }
3045
3046 /* SG_IO or similar, copy sense data back */
3047 if (cmd->rq->sense) {
3048 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3049 cmd->rq->sense_len = cmd->err_info->SenseLen;
3050 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3051 cmd->rq->sense_len);
3052 } else
3053 cmd->rq->sense_len = 0;
3054
1a614f50 3055 return error_value;
03bbfee5
MMOD		 3056}
3057
7c832835 3058/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3059 * buffers for the completed job. Note that this function does not need
3060 * to hold the hba/queue lock.
7c832835
BH		 3061 */
3062static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3063 int timeout)
1da177e4 3064{
1da177e4 3065 int retry_cmd = 0;
198b7660
MMOD		 3066 struct request *rq = cmd->rq;
3067
3068 rq->errors = 0;
7c832835 3069
1da177e4 3070 if (timeout)
1a614f50 3071 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3072
d38ae168
MMOD		 3073 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3074 goto after_error_processing;
7c832835 3075
d38ae168 3076 switch (cmd->err_info->CommandStatus) {
d38ae168 3077 case CMD_TARGET_STATUS:
0a9279cc 3078 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3079 break;
3080 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3081 if (blk_fs_request(cmd->rq)) {
3082 printk(KERN_WARNING "cciss: cmd %p has"
3083 " completed with data underrun "
3084 "reported\n", cmd);
c3a4d78c 3085 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3086 }
d38ae168
MMOD		 3087 break;
3088 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3089 if (blk_fs_request(cmd->rq))
3090 printk(KERN_WARNING "cciss: cmd %p has"
3091 " completed with data overrun "
3092 "reported\n", cmd);
d38ae168
MMOD		 3093 break;
3094 case CMD_INVALID:
3095 printk(KERN_WARNING "cciss: cmd %p is "
3096 "reported invalid\n", cmd);
1a614f50
SC		 3097 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3098 cmd->err_info->CommandStatus, DRIVER_OK,
3099 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3100 break;
3101 case CMD_PROTOCOL_ERR:
3102 printk(KERN_WARNING "cciss: cmd %p has "
3103 "protocol error \n", cmd);
1a614f50
SC		 3104 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3105 cmd->err_info->CommandStatus, DRIVER_OK,
3106 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3107 break;
3108 case CMD_HARDWARE_ERR:
3109 printk(KERN_WARNING "cciss: cmd %p had "
3110 " hardware error\n", cmd);
1a614f50
SC		 3111 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3112 cmd->err_info->CommandStatus, DRIVER_OK,
3113 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3114 break;
3115 case CMD_CONNECTION_LOST:
3116 printk(KERN_WARNING "cciss: cmd %p had "
3117 "connection lost\n", cmd);
1a614f50
SC		 3118 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3119 cmd->err_info->CommandStatus, DRIVER_OK,
3120 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3121 break;
3122 case CMD_ABORTED:
3123 printk(KERN_WARNING "cciss: cmd %p was "
3124 "aborted\n", cmd);
1a614f50
SC		 3125 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3126 cmd->err_info->CommandStatus, DRIVER_OK,
3127 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3128 break;
3129 case CMD_ABORT_FAILED:
3130 printk(KERN_WARNING "cciss: cmd %p reports "
3131 "abort failed\n", cmd);
1a614f50
SC		 3132 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3133 cmd->err_info->CommandStatus, DRIVER_OK,
3134 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3135 break;
3136 case CMD_UNSOLICITED_ABORT:
3137 printk(KERN_WARNING "cciss%d: unsolicited "
3138 "abort %p\n", h->ctlr, cmd);
3139 if (cmd->retry_count < MAX_CMD_RETRIES) {
3140 retry_cmd = 1;
3141 printk(KERN_WARNING
3142 "cciss%d: retrying %p\n", h->ctlr, cmd);
3143 cmd->retry_count++;
3144 } else
3145 printk(KERN_WARNING
3146 "cciss%d: %p retried too "
3147 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3148 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3149 cmd->err_info->CommandStatus, DRIVER_OK,
3150 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3151 break;
3152 case CMD_TIMEOUT:
3153 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3154 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3155 cmd->err_info->CommandStatus, DRIVER_OK,
3156 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3157 break;
3158 default:
3159 printk(KERN_WARNING "cciss: cmd %p returned "
3160 "unknown status %x\n", cmd,
3161 cmd->err_info->CommandStatus);
1a614f50
SC		 3162 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3163 cmd->err_info->CommandStatus, DRIVER_OK,
3164 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3165 }
d38ae168
MMOD		 3166
3167after_error_processing:
3168
1da177e4 3169 /* We need to return this command */
7c832835
BH		 3170 if (retry_cmd) {
3171 resend_cciss_cmd(h, cmd);
1da177e4 3172 return;
7c832835 3173 }
03bbfee5 3174 cmd->rq->completion_data = cmd;
a9925a06 3175 blk_complete_request(cmd->rq);
1da177e4
LT		 3176}
3177
7c832835
BH		 3178/*
3179 * Get a request and submit it to the controller.
1da177e4 3180 */
165125e1 3181static void do_cciss_request(struct request_queue *q)
1da177e4 3182{
7c832835 3183 ctlr_info_t *h = q->queuedata;
1da177e4 3184 CommandList_struct *c;
00988a35
MMOD		 3185 sector_t start_blk;
3186 int seg;
1da177e4
LT		 3187 struct request *creq;
3188 u64bit temp64;
3189 struct scatterlist tmp_sg[MAXSGENTRIES];
3190 drive_info_struct *drv;
3191 int i, dir;
3192
3193 /* We call start_io here in case there is a command waiting on the
3194 * queue that has not been sent.
7c832835 3195 */
1da177e4
LT		 3196 if (blk_queue_plugged(q))
3197 goto startio;
3198
7c832835 3199 queue:
9934c8c0 3200 creq = blk_peek_request(q);
1da177e4
LT		 3201 if (!creq)
3202 goto startio;
3203
089fe1b2 3204 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3205
7c832835 3206 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3207 goto full;
3208
9934c8c0 3209 blk_start_request(creq);
1da177e4
LT		 3210
3211 spin_unlock_irq(q->queue_lock);
3212
3213 c->cmd_type = CMD_RWREQ;
3214 c->rq = creq;
7c832835
BH		 3215
3216 /* fill in the request */
1da177e4 3217 drv = creq->rq_disk->private_data;
7c832835 3218 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3219 /* got command from pool, so use the command block index instead */
3220 /* for direct lookups. */
3221 /* The first 2 bits are reserved for controller error reporting. */
3222 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3223 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3224 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
7c832835
BH		 3225 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3226 c->Request.Type.Type = TYPE_CMD; // It is a command.
3227 c->Request.Type.Attribute = ATTR_SIMPLE;
3228 c->Request.Type.Direction =
a52de245 3229 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3230 c->Request.Timeout = 0; // Don't time out
3231 c->Request.CDB[0] =
00988a35 3232 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3233 start_blk = blk_rq_pos(creq);
1da177e4 3234#ifdef CCISS_DEBUG
83096ebf
TH		 3235 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3236 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3237#endif /* CCISS_DEBUG */
1da177e4 3238
45711f1a 3239 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3240 seg = blk_rq_map_sg(q, creq, tmp_sg);
3241
7c832835 3242 /* get the DMA records for the setup */
1da177e4
LT		 3243 if (c->Request.Type.Direction == XFER_READ)
3244 dir = PCI_DMA_FROMDEVICE;
3245 else
3246 dir = PCI_DMA_TODEVICE;
3247
7c832835 3248 for (i = 0; i < seg; i++) {
1da177e4 3249 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3250 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3251 tmp_sg[i].offset,
3252 tmp_sg[i].length, dir);
1da177e4 3253 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3254 c->SG[i].Addr.upper = temp64.val32.upper;
3255 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3256 }
7c832835
BH		 3257 /* track how many SG entries we are using */
3258 if (seg > h->maxSG)
3259 h->maxSG = seg;
1da177e4
LT		 3260
3261#ifdef CCISS_DEBUG
83096ebf
TH		 3262 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3263 blk_rq_sectors(creq), seg);
7c832835 3264#endif /* CCISS_DEBUG */
1da177e4
LT		 3265
3266 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3267 if (likely(blk_fs_request(creq))) {
3268 if(h->cciss_read == CCISS_READ_10) {
3269 c->Request.CDB[1] = 0;
3270 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3271 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3272 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3273 c->Request.CDB[5] = start_blk & 0xff;
3274 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3275 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3276 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3277 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3278 } else {
582539e5
RD		 3279 u32 upper32 = upper_32_bits(start_blk);
3280
03bbfee5
MMOD		 3281 c->Request.CDBLen = 16;
3282 c->Request.CDB[1]= 0;
582539e5
RD		 3283 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3284 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3285 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3286 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3287 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3288 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3289 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3290 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3291 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3292 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3293 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3294 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3295 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3296 }
3297 } else if (blk_pc_request(creq)) {
3298 c->Request.CDBLen = creq->cmd_len;
3299 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3300 } else {
03bbfee5
MMOD		 3301 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3302 BUG();
00988a35 3303 }
1da177e4
LT		 3304
3305 spin_lock_irq(q->queue_lock);
3306
8a3173de 3307 addQ(&h->reqQ, c);
1da177e4 3308 h->Qdepth++;
7c832835
BH		 3309 if (h->Qdepth > h->maxQsinceinit)
3310 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3311
3312 goto queue;
00988a35 3313full:
1da177e4 3314 blk_stop_queue(q);
00988a35 3315startio:
1da177e4
LT		 3316 /* We will already have the driver lock here so not need
3317 * to lock it.
7c832835 3318 */
1da177e4
LT		 3319 start_io(h);
3320}
3321
3da8b713 3322static inline unsigned long get_next_completion(ctlr_info_t *h)
3323{
3da8b713 3324 return h->access.command_completed(h);
3da8b713 3325}
3326
3327static inline int interrupt_pending(ctlr_info_t *h)
3328{
3da8b713 3329 return h->access.intr_pending(h);
3da8b713 3330}
3331
3332static inline long interrupt_not_for_us(ctlr_info_t *h)
3333{
7c832835 3334 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3335 (h->interrupts_enabled == 0)));
3da8b713 3336}
3337
7d12e780 3338static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3339{
3340 ctlr_info_t *h = dev_id;
3341 CommandList_struct *c;
3342 unsigned long flags;
33079b21 3343 __u32 a, a1, a2;
1da177e4 3344
3da8b713 3345 if (interrupt_not_for_us(h))
1da177e4 3346 return IRQ_NONE;
1da177e4
LT		 3347 /*
3348 * If there are completed commands in the completion queue,
3349 * we had better do something about it.
3350 */
3351 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3352 while (interrupt_pending(h)) {
7c832835 3353 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3354 a1 = a;
33079b21
MM		 3355 if ((a & 0x04)) {
3356 a2 = (a >> 3);
f880632f 3357 if (a2 >= h->nr_cmds) {
7c832835
BH		 3358 printk(KERN_WARNING
3359 "cciss: controller cciss%d failed, stopping.\n",
3360 h->ctlr);
33079b21
MM		 3361 fail_all_cmds(h->ctlr);
3362 return IRQ_HANDLED;
3363 }
3364
3365 c = h->cmd_pool + a2;
3366 a = c->busaddr;
3367
3368 } else {
8a3173de
JA		 3369 struct hlist_node *tmp;
3370
7c832835 3371 a &= ~3;
8a3173de
JA		 3372 c = NULL;
3373 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3374 if (c->busaddr == a)
7c832835
BH		 3375 break;
3376 }
33079b21 3377 }
1da177e4
LT		 3378 /*
3379 * If we've found the command, take it off the
3380 * completion Q and free it
3381 */
8a3173de
JA		 3382 if (c && c->busaddr == a) {
3383 removeQ(c);
1da177e4
LT		 3384 if (c->cmd_type == CMD_RWREQ) {
3385 complete_command(h, c, 0);
3386 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3387 complete(c->waiting);
3388 }
3389# ifdef CONFIG_CISS_SCSI_TAPE
3390 else if (c->cmd_type == CMD_SCSI)
3391 complete_scsi_command(c, 0, a1);
3392# endif
3393 continue;
3394 }
3395 }
3396 }
3397
1da177e4
LT		 3398 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3399 return IRQ_HANDLED;
3400}
7c832835 3401
b368c9dd
AP		 3402/**
3403 * add_to_scan_list() - add controller to rescan queue
3404 * @h: Pointer to the controller.
3405 *
3406 * Adds the controller to the rescan queue if not already on the queue.
3407 *
3408 * returns 1 if added to the queue, 0 if skipped (could be on the
3409 * queue already, or the controller could be initializing or shutting
3410 * down).
3411 **/
3412static int add_to_scan_list(struct ctlr_info *h)
3413{
3414 struct ctlr_info *test_h;
3415 int found = 0;
3416 int ret = 0;
3417
3418 if (h->busy_initializing)
3419 return 0;
3420
3421 if (!mutex_trylock(&h->busy_shutting_down))
3422 return 0;
3423
3424 mutex_lock(&scan_mutex);
3425 list_for_each_entry(test_h, &scan_q, scan_list) {
3426 if (test_h == h) {
3427 found = 1;
3428 break;
3429 }
3430 }
3431 if (!found && !h->busy_scanning) {
3432 INIT_COMPLETION(h->scan_wait);
3433 list_add_tail(&h->scan_list, &scan_q);
3434 ret = 1;
3435 }
3436 mutex_unlock(&scan_mutex);
3437 mutex_unlock(&h->busy_shutting_down);
3438
3439 return ret;
3440}
3441
3442/**
3443 * remove_from_scan_list() - remove controller from rescan queue
3444 * @h: Pointer to the controller.
3445 *
3446 * Removes the controller from the rescan queue if present. Blocks if
3447 * the controller is currently conducting a rescan.
3448 **/
3449static void remove_from_scan_list(struct ctlr_info *h)
3450{
3451 struct ctlr_info *test_h, *tmp_h;
3452 int scanning = 0;
3453
3454 mutex_lock(&scan_mutex);
3455 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3456 if (test_h == h) {
3457 list_del(&h->scan_list);
3458 complete_all(&h->scan_wait);
3459 mutex_unlock(&scan_mutex);
3460 return;
3461 }
3462 }
3463 if (&h->busy_scanning)
3464 scanning = 0;
3465 mutex_unlock(&scan_mutex);
3466
3467 if (scanning)
3468 wait_for_completion(&h->scan_wait);
3469}
3470
3471/**
3472 * scan_thread() - kernel thread used to rescan controllers
3473 * @data: Ignored.
3474 *
3475 * A kernel thread used scan for drive topology changes on
3476 * controllers. The thread processes only one controller at a time
3477 * using a queue. Controllers are added to the queue using
3478 * add_to_scan_list() and removed from the queue either after done
3479 * processing or using remove_from_scan_list().
3480 *
3481 * returns 0.
3482 **/
0a9279cc
MM		 3483static int scan_thread(void *data)
3484{
b368c9dd 3485 struct ctlr_info *h;
0a9279cc 3486
b368c9dd
AP		 3487 while (1) {
3488 set_current_state(TASK_INTERRUPTIBLE);
3489 schedule();
0a9279cc
MM		 3490 if (kthread_should_stop())
3491 break;
b368c9dd
AP		 3492
3493 while (1) {
3494 mutex_lock(&scan_mutex);
3495 if (list_empty(&scan_q)) {
3496 mutex_unlock(&scan_mutex);
3497 break;
3498 }
3499
3500 h = list_entry(scan_q.next,
3501 struct ctlr_info,
3502 scan_list);
3503 list_del(&h->scan_list);
3504 h->busy_scanning = 1;
3505 mutex_unlock(&scan_mutex);
3506
3507 if (h) {
2d11d993 3508 rebuild_lun_table(h, 0, 0);
b368c9dd
AP		 3509 complete_all(&h->scan_wait);
3510 mutex_lock(&scan_mutex);
3511 h->busy_scanning = 0;
3512 mutex_unlock(&scan_mutex);
3513 }
3514 }
0a9279cc 3515 }
b368c9dd 3516
0a9279cc
MM		 3517 return 0;
3518}
3519
3520static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3521{
3522 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3523 return 0;
3524
3525 switch (c->err_info->SenseInfo[12]) {
3526 case STATE_CHANGED:
3527 printk(KERN_WARNING "cciss%d: a state change "
3528 "detected, command retried\n", h->ctlr);
3529 return 1;
3530 break;
3531 case LUN_FAILED:
3532 printk(KERN_WARNING "cciss%d: LUN failure "
3533 "detected, action required\n", h->ctlr);
3534 return 1;
3535 break;
3536 case REPORT_LUNS_CHANGED:
3537 printk(KERN_WARNING "cciss%d: report LUN data "
3538 "changed\n", h->ctlr);
b368c9dd
AP		 3539 add_to_scan_list(h);
3540 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3541 return 1;
3542 break;
3543 case POWER_OR_RESET:
3544 printk(KERN_WARNING "cciss%d: a power on "
3545 "or device reset detected\n", h->ctlr);
3546 return 1;
3547 break;
3548 case UNIT_ATTENTION_CLEARED:
3549 printk(KERN_WARNING "cciss%d: unit attention "
3550 "cleared by another initiator\n", h->ctlr);
3551 return 1;
3552 break;
3553 default:
3554 printk(KERN_WARNING "cciss%d: unknown "
3555 "unit attention detected\n", h->ctlr);
3556 return 1;
3557 }
3558}
3559
7c832835 3560/*
d14c4ab5 3561 * We cannot read the structure directly, for portability we must use
1da177e4 3562 * the io functions.
7c832835 3563 * This is for debug only.
1da177e4
LT		 3564 */
3565#ifdef CCISS_DEBUG
7c832835 3566static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3567{
3568 int i;
3569 char temp_name[17];
3570
3571 printk("Controller Configuration information\n");
3572 printk("------------------------------------\n");
7c832835 3573 for (i = 0; i < 4; i++)
1da177e4 3574 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3575 temp_name[4] = '\0';
3576 printk(" Signature = %s\n", temp_name);
1da177e4 3577 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3578 printk(" Transport methods supported = 0x%x\n",
3579 readl(&(tb->TransportSupport)));
3580 printk(" Transport methods active = 0x%x\n",
3581 readl(&(tb->TransportActive)));
3582 printk(" Requested transport Method = 0x%x\n",
3583 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3584 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3585 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3586 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3587 readl(&(tb->HostWrite.CoalIntCount)));
3588 printk(" Max outstanding commands = 0x%d\n",
3589 readl(&(tb->CmdsOutMax)));
3590 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3591 for (i = 0; i < 16; i++)
1da177e4
LT		 3592 temp_name[i] = readb(&(tb->ServerName[i]));
3593 temp_name[16] = '\0';
3594 printk(" Server Name = %s\n", temp_name);
7c832835 3595 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3596}
7c832835 3597#endif /* CCISS_DEBUG */
1da177e4 3598
7c832835 3599static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3600{
3601 int i, offset, mem_type, bar_type;
7c832835 3602 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3603 return 0;
3604 offset = 0;
7c832835
BH		 3605 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3606 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3607 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3608 offset += 4;
3609 else {
3610 mem_type = pci_resource_flags(pdev, i) &
7c832835 3611 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3612 switch (mem_type) {
7c832835
BH		 3613 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3614 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3615 offset += 4; /* 32 bit */
3616 break;
3617 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3618 offset += 8;
3619 break;
3620 default: /* reserved in PCI 2.2 */
3621 printk(KERN_WARNING
3622 "Base address is invalid\n");
3623 return -1;
1da177e4
LT		 3624 break;
3625 }
3626 }
7c832835
BH		 3627 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3628 return i + 1;
1da177e4
LT		 3629 }
3630 return -1;
3631}
3632
fb86a35b
MM		 3633/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3634 * controllers that are capable. If not, we use IO-APIC mode.
3635 */
3636
7c832835
BH		 3637static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3638 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3639{
3640#ifdef CONFIG_PCI_MSI
7c832835
BH		 3641 int err;
3642 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3643 {0, 2}, {0, 3}
3644 };
fb86a35b
MM		 3645
3646 /* Some boards advertise MSI but don't really support it */
3647 if ((board_id == 0x40700E11) ||
7c832835
BH		 3648 (board_id == 0x40800E11) ||
3649 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3650 goto default_int_mode;
3651
7c832835
BH		 3652 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3653 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3654 if (!err) {
3655 c->intr[0] = cciss_msix_entries[0].vector;
3656 c->intr[1] = cciss_msix_entries[1].vector;
3657 c->intr[2] = cciss_msix_entries[2].vector;
3658 c->intr[3] = cciss_msix_entries[3].vector;
3659 c->msix_vector = 1;
3660 return;
3661 }
3662 if (err > 0) {
3663 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3664 "available\n", err);
1ecb9c0f 3665 goto default_int_mode;
7c832835
BH		 3666 } else {
3667 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3668 err);
1ecb9c0f 3669 goto default_int_mode;
7c832835
BH		 3670 }
3671 }
3672 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3673 if (!pci_enable_msi(pdev)) {
7c832835 3674 c->msi_vector = 1;
7c832835
BH		 3675 } else {
3676 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3677 }
3678 }
1ecb9c0f 3679default_int_mode:
7c832835 3680#endif /* CONFIG_PCI_MSI */
fb86a35b 3681 /* if we get here we're going to use the default interrupt mode */
7c832835 3682 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3683 return;
3684}
3685
7d1fd970 3686static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3687{
3688 ushort subsystem_vendor_id, subsystem_device_id, command;
3689 __u32 board_id, scratchpad = 0;
3690 __u64 cfg_offset;
3691 __u32 cfg_base_addr;
3692 __u64 cfg_base_addr_index;
c33ac89b 3693 int i, err;
1da177e4
LT		 3694
3695 /* check to see if controller has been disabled */
3696 /* BEFORE trying to enable it */
7c832835
BH		 3697 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3698 if (!(command & 0x02)) {
3699 printk(KERN_WARNING
3700 "cciss: controller appears to be disabled\n");
c33ac89b 3701 return -ENODEV;
1da177e4
LT		 3702 }
3703
c33ac89b 3704 err = pci_enable_device(pdev);
7c832835 3705 if (err) {
1da177e4 3706 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3707 return err;
1da177e4 3708 }
1da177e4 3709
4e570309
BH		 3710 err = pci_request_regions(pdev, "cciss");
3711 if (err) {
3712 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3713 "aborting\n");
872225ca 3714 return err;
4e570309
BH		 3715 }
3716
1da177e4
LT		 3717 subsystem_vendor_id = pdev->subsystem_vendor;
3718 subsystem_device_id = pdev->subsystem_device;
3719 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3720 subsystem_vendor_id);
1da177e4 3721
1da177e4
LT		 3722#ifdef CCISS_DEBUG
3723 printk("command = %x\n", command);
3724 printk("irq = %x\n", pdev->irq);
3725 printk("board_id = %x\n", board_id);
7c832835 3726#endif /* CCISS_DEBUG */
1da177e4 3727
fb86a35b
MM		 3728/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3729 * else we use the IO-APIC interrupt assigned to us by system ROM.
3730 */
3731 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3732
e1438581
MM		 3733 /* find the memory BAR */
3734 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3735 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3736 break;
3737 }
3738 if (i == DEVICE_COUNT_RESOURCE) {
3739 printk(KERN_WARNING "cciss: No memory BAR found\n");
3740 err = -ENODEV;
3741 goto err_out_free_res;
3742 }
3743
3744 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3745 * already removed
3746 */
1da177e4 3747
1da177e4 3748#ifdef CCISS_DEBUG
9f92f471 3749 printk("address 0 = %lx\n", c->paddr);
7c832835 3750#endif /* CCISS_DEBUG */
a5b92873 3751 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3752
3753 /* Wait for the board to become ready. (PCI hotplug needs this.)
3754 * We poll for up to 120 secs, once per 100ms. */
7c832835 3755 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3756 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3757 if (scratchpad == CCISS_FIRMWARE_READY)
3758 break;
3759 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3760 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3761 }
3762 if (scratchpad != CCISS_FIRMWARE_READY) {
3763 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3764 err = -ENODEV;
4e570309 3765 goto err_out_free_res;
1da177e4
LT		 3766 }
3767
3768 /* get the address index number */
3769 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3770 cfg_base_addr &= (__u32) 0x0000ffff;
3771#ifdef CCISS_DEBUG
3772 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3773#endif /* CCISS_DEBUG */
3774 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3775#ifdef CCISS_DEBUG
9f92f471
RD		 3776 printk("cfg base address index = %llx\n",
3777 (unsigned long long)cfg_base_addr_index);
7c832835 3778#endif /* CCISS_DEBUG */
1da177e4
LT		 3779 if (cfg_base_addr_index == -1) {
3780 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3781 err = -ENODEV;
4e570309 3782 goto err_out_free_res;
1da177e4
LT		 3783 }
3784
3785 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3786#ifdef CCISS_DEBUG
9f92f471 3787 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3788#endif /* CCISS_DEBUG */
3789 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3790 cfg_base_addr_index) +
3791 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3792 c->board_id = board_id;
3793
3794#ifdef CCISS_DEBUG
945f390f 3795 print_cfg_table(c->cfgtable);
7c832835 3796#endif /* CCISS_DEBUG */
1da177e4 3797
49153998
MM		 3798 /* Some controllers support Zero Memory Raid (ZMR).
3799 * When configured in ZMR mode the number of supported
3800 * commands drops to 64. So instead of just setting an
3801 * arbitrary value we make the driver a little smarter.
3802 * We read the config table to tell us how many commands
3803 * are supported on the controller then subtract 4 to
3804 * leave a little room for ioctl calls.
3805 */
3806 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3807 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3808 if (board_id == products[i].board_id) {
3809 c->product_name = products[i].product_name;
3810 c->access = *(products[i].access);
49153998 3811 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3812 break;
3813 }
3814 }
7c832835
BH		 3815 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3816 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3817 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3818 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3819 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3820 err = -ENODEV;
4e570309 3821 goto err_out_free_res;
1da177e4 3822 }
4ff9a9a4
MM		 3823 /* We didn't find the controller in our list. We know the
3824 * signature is valid. If it's an HP device let's try to
3825 * bind to the device and fire it up. Otherwise we bail.
3826 */
3827 if (i == ARRAY_SIZE(products)) {
3828 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3829 c->product_name = products[i-1].product_name;
3830 c->access = *(products[i-1].access);
49153998 3831 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3832 printk(KERN_WARNING "cciss: This is an unknown "
3833 "Smart Array controller.\n"
3834 "cciss: Please update to the latest driver "
3835 "available from www.hp.com.\n");
3836 } else {
3837 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3838 " to access the Smart Array controller %08lx\n"
3839 , (unsigned long)board_id);
3840 err = -ENODEV;
3841 goto err_out_free_res;
3842 }
3843 }
1da177e4 3844#ifdef CONFIG_X86
7c832835
BH		 3845 {
3846 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3847 __u32 prefetch;
3848 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3849 prefetch |= 0x100;
3850 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3851 }
1da177e4
LT		 3852#endif
3853
8bf50f71
MMOD		 3854 /* Disabling DMA prefetch and refetch for the P600.
3855 * An ASIC bug may result in accesses to invalid memory addresses.
3856 * We've disabled prefetch for some time now. Testing with XEN
3857 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3858 */
3859 if(board_id == 0x3225103C) {
3860 __u32 dma_prefetch;
8bf50f71 3861 __u32 dma_refetch;
f92e2f5f
MM		 3862 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3863 dma_prefetch |= 0x8000;
3864 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3865 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3866 dma_refetch |= 0x1;
3867 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3868 }
3869
1da177e4
LT		 3870#ifdef CCISS_DEBUG
3871 printk("Trying to put board into Simple mode\n");
7c832835 3872#endif /* CCISS_DEBUG */
1da177e4 3873 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3874 /* Update the field, and then ring the doorbell */
3875 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3876 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3877
3878 /* under certain very rare conditions, this can take awhile.
3879 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3880 * as we enter this code.) */
7c832835 3881 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3882 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3883 break;
3884 /* delay and try again */
3885 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3886 schedule_timeout(msecs_to_jiffies(1));
7c832835 3887 }
1da177e4
LT		 3888
3889#ifdef CCISS_DEBUG
7c832835
BH		 3890 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3891 readl(c->vaddr + SA5_DOORBELL));
3892#endif /* CCISS_DEBUG */
1da177e4 3893#ifdef CCISS_DEBUG
7c832835
BH		 3894 print_cfg_table(c->cfgtable);
3895#endif /* CCISS_DEBUG */
1da177e4 3896
7c832835 3897 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3898 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3899 " simple mode\n");
c33ac89b 3900 err = -ENODEV;
4e570309 3901 goto err_out_free_res;
1da177e4
LT		 3902 }
3903 return 0;
3904
5faad620 3905err_out_free_res:
872225ca
MM		 3906 /*
3907 * Deliberately omit pci_disable_device(): it does something nasty to
3908 * Smart Array controllers that pci_enable_device does not undo
3909 */
4e570309 3910 pci_release_regions(pdev);
c33ac89b 3911 return err;
1da177e4
LT		 3912}
3913
6ae5ce8e
MM		 3914/* Function to find the first free pointer into our hba[] array
3915 * Returns -1 if no free entries are left.
7c832835 3916 */
1da177e4
LT		 3917static int alloc_cciss_hba(void)
3918{
799202cb 3919 int i;
1da177e4 3920
7c832835 3921 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3922 if (!hba[i]) {
3923 ctlr_info_t *p;
f2912a12 3924
06ff37ff 3925 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3926 if (!p)
3927 goto Enomem;
1da177e4
LT		 3928 hba[i] = p;
3929 return i;
3930 }
3931 }
3932 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3933 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3934 return -1;
3935Enomem:
1da177e4 3936 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3937 return -1;
3938}
3939
2c935593 3940static void free_hba(int n)
1da177e4 3941{
2c935593
SC		 3942 ctlr_info_t *h = hba[n];
3943 int i;
1da177e4 3944
2c935593
SC		 3945 hba[n] = NULL;
3946 for (i = 0; i < h->highest_lun + 1; i++)
3947 if (h->gendisk[i] != NULL)
3948 put_disk(h->gendisk[i]);
3949 kfree(h);
1da177e4
LT		 3950}
3951
82eb03cf
CC		 3952/* Send a message CDB to the firmware. */
3953static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3954{
3955 typedef struct {
3956 CommandListHeader_struct CommandHeader;
3957 RequestBlock_struct Request;
3958 ErrDescriptor_struct ErrorDescriptor;
3959 } Command;
3960 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3961 Command *cmd;
3962 dma_addr_t paddr64;
3963 uint32_t paddr32, tag;
3964 void __iomem *vaddr;
3965 int i, err;
3966
3967 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3968 if (vaddr == NULL)
3969 return -ENOMEM;
3970
3971 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3972 CCISS commands, so they must be allocated from the lower 4GiB of
3973 memory. */
e930438c 3974 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3975 if (err) {
3976 iounmap(vaddr);
3977 return -ENOMEM;
3978 }
3979
3980 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3981 if (cmd == NULL) {
3982 iounmap(vaddr);
3983 return -ENOMEM;
3984 }
3985
3986 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3987 although there's no guarantee, we assume that the address is at
3988 least 4-byte aligned (most likely, it's page-aligned). */
3989 paddr32 = paddr64;
3990
3991 cmd->CommandHeader.ReplyQueue = 0;
3992 cmd->CommandHeader.SGList = 0;
3993 cmd->CommandHeader.SGTotal = 0;
3994 cmd->CommandHeader.Tag.lower = paddr32;
3995 cmd->CommandHeader.Tag.upper = 0;
3996 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3997
3998 cmd->Request.CDBLen = 16;
3999 cmd->Request.Type.Type = TYPE_MSG;
4000 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4001 cmd->Request.Type.Direction = XFER_NONE;
4002 cmd->Request.Timeout = 0; /* Don't time out */
4003 cmd->Request.CDB[0] = opcode;
4004 cmd->Request.CDB[1] = type;
4005 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4006
4007 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4008 cmd->ErrorDescriptor.Addr.upper = 0;
4009 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4010
4011 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4012
4013 for (i = 0; i < 10; i++) {
4014 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4015 if ((tag & ~3) == paddr32)
4016 break;
4017 schedule_timeout_uninterruptible(HZ);
4018 }
4019
4020 iounmap(vaddr);
4021
4022 /* we leak the DMA buffer here ... no choice since the controller could
4023 still complete the command. */
4024 if (i == 10) {
4025 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4026 opcode, type);
4027 return -ETIMEDOUT;
4028 }
4029
4030 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4031
4032 if (tag & 2) {
4033 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4034 opcode, type);
4035 return -EIO;
4036 }
4037
4038 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4039 opcode, type);
4040 return 0;
4041}
4042
4043#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4044#define cciss_noop(p) cciss_message(p, 3, 0)
4045
4046static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4047{
4048/* the #defines are stolen from drivers/pci/msi.h. */
4049#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4050#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4051
4052 int pos;
4053 u16 control = 0;
4054
4055 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4056 if (pos) {
4057 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4058 if (control & PCI_MSI_FLAGS_ENABLE) {
4059 printk(KERN_INFO "cciss: resetting MSI\n");
4060 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4061 }
4062 }
4063
4064 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4065 if (pos) {
4066 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4067 if (control & PCI_MSIX_FLAGS_ENABLE) {
4068 printk(KERN_INFO "cciss: resetting MSI-X\n");
4069 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4070 }
4071 }
4072
4073 return 0;
4074}
4075
4076/* This does a hard reset of the controller using PCI power management
4077 * states. */
4078static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4079{
4080 u16 pmcsr, saved_config_space[32];
4081 int i, pos;
4082
4083 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4084
4085 /* This is very nearly the same thing as
4086
4087 pci_save_state(pci_dev);
4088 pci_set_power_state(pci_dev, PCI_D3hot);
4089 pci_set_power_state(pci_dev, PCI_D0);
4090 pci_restore_state(pci_dev);
4091
4092 but we can't use these nice canned kernel routines on
4093 kexec, because they also check the MSI/MSI-X state in PCI
4094 configuration space and do the wrong thing when it is
4095 set/cleared. Also, the pci_save/restore_state functions
4096 violate the ordering requirements for restoring the
4097 configuration space from the CCISS document (see the
4098 comment below). So we roll our own .... */
4099
4100 for (i = 0; i < 32; i++)
4101 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4102
4103 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4104 if (pos == 0) {
4105 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4106 return -ENODEV;
4107 }
4108
4109 /* Quoting from the Open CISS Specification: "The Power
4110 * Management Control/Status Register (CSR) controls the power
4111 * state of the device. The normal operating state is D0,
4112 * CSR=00h. The software off state is D3, CSR=03h. To reset
4113 * the controller, place the interface device in D3 then to
4114 * D0, this causes a secondary PCI reset which will reset the
4115 * controller." */
4116
4117 /* enter the D3hot power management state */
4118 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4119 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4120 pmcsr |= PCI_D3hot;
4121 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4122
4123 schedule_timeout_uninterruptible(HZ >> 1);
4124
4125 /* enter the D0 power management state */
4126 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4127 pmcsr |= PCI_D0;
4128 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4129
4130 schedule_timeout_uninterruptible(HZ >> 1);
4131
4132 /* Restore the PCI configuration space. The Open CISS
4133 * Specification says, "Restore the PCI Configuration
4134 * Registers, offsets 00h through 60h. It is important to
4135 * restore the command register, 16-bits at offset 04h,
4136 * last. Do not restore the configuration status register,
4137 * 16-bits at offset 06h." Note that the offset is 2*i. */
4138 for (i = 0; i < 32; i++) {
4139 if (i == 2 || i == 3)
4140 continue;
4141 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4142 }
4143 wmb();
4144 pci_write_config_word(pdev, 4, saved_config_space[2]);
4145
4146 return 0;
4147}
4148
1da177e4
LT		 4149/*
4150 * This is it. Find all the controllers and register them. I really hate
4151 * stealing all these major device numbers.
4152 * returns the number of block devices registered.
4153 */
4154static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4155 const struct pci_device_id *ent)
1da177e4 4156{
1da177e4 4157 int i;
799202cb 4158 int j = 0;
1da177e4 4159 int rc;
22bece00 4160 int dac, return_code;
212a5026 4161 InquiryData_struct *inq_buff;
1da177e4 4162
82eb03cf
CC		 4163 if (reset_devices) {
4164 /* Reset the controller with a PCI power-cycle */
4165 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4166 return -ENODEV;
4167
5e18cfd0
JA		 4168 /* Now try to get the controller to respond to a no-op. Some
4169 devices (notably the HP Smart Array 5i Controller) need
4170 up to 30 seconds to respond. */
5e4c91c8 4171 for (i=0; i<30; i++) {
82eb03cf
CC		 4172 if (cciss_noop(pdev) == 0)
4173 break;
5e4c91c8
JA		 4174
4175 schedule_timeout_uninterruptible(HZ);
4176 }
4177 if (i == 30) {
4178 printk(KERN_ERR "cciss: controller seems dead\n");
4179 return -EBUSY;
82eb03cf
CC		 4180 }
4181 }
4182
1da177e4 4183 i = alloc_cciss_hba();
7c832835 4184 if (i < 0)
e2019b58 4185 return -1;
1f8ef380
MM		 4186
4187 hba[i]->busy_initializing = 1;
8a3173de
JA		 4188 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4189 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4190 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4191
1da177e4 4192 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 4193 goto clean0;
1da177e4
LT		 4194
4195 sprintf(hba[i]->devname, "cciss%d", i);
4196 hba[i]->ctlr = i;
4197 hba[i]->pdev = pdev;
4198
b368c9dd
AP		 4199 init_completion(&hba[i]->scan_wait);
4200
7fe06326
AP		 4201 if (cciss_create_hba_sysfs_entry(hba[i]))
4202 goto clean0;
4203
1da177e4 4204 /* configure PCI DMA stuff */
6a35528a 4205 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4206 dac = 1;
284901a9 4207 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4208 dac = 0;
1da177e4 4209 else {
40aabb58 4210 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4211 goto clean1;
4212 }
4213
4214 /*
4215 * register with the major number, or get a dynamic major number
4216 * by passing 0 as argument. This is done for greater than
4217 * 8 controller support.
4218 */
4219 if (i < MAX_CTLR_ORIG)
564de74a 4220 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4221 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4222 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4223 printk(KERN_ERR
7c832835
BH		 4224 "cciss: Unable to get major number %d for %s "
4225 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4226 goto clean1;
7c832835 4227 } else {
1da177e4
LT		 4228 if (i >= MAX_CTLR_ORIG)
4229 hba[i]->major = rc;
4230 }
4231
4232 /* make sure the board interrupts are off */
4233 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4234 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4235 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4236 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4237 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4238 goto clean2;
4239 }
40aabb58
BH		 4240
4241 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4242 hba[i]->devname, pdev->device, pci_name(pdev),
4243 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4244
4245 hba[i]->cmd_pool_bits =
061837bc
JL		 4246 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4247 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4248 hba[i]->cmd_pool = (CommandList_struct *)
4249 pci_alloc_consistent(hba[i]->pdev,
f880632f 4250 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4251 &(hba[i]->cmd_pool_dhandle));
4252 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4253 pci_alloc_consistent(hba[i]->pdev,
f880632f 4254 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4255 &(hba[i]->errinfo_pool_dhandle));
4256 if ((hba[i]->cmd_pool_bits == NULL)
4257 || (hba[i]->cmd_pool == NULL)
4258 || (hba[i]->errinfo_pool == NULL)) {
4259 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4260 goto clean4;
4261 }
1da177e4 4262 spin_lock_init(&hba[i]->lock);
1da177e4 4263
7c832835
BH		 4264 /* Initialize the pdev driver private data.
4265 have it point to hba[i]. */
1da177e4 4266 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4267 /* command and error info recs zeroed out before
4268 they are used */
4269 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4270 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4271 * sizeof(unsigned long));
1da177e4 4272
6ae5ce8e
MM		 4273 hba[i]->num_luns = 0;
4274 hba[i]->highest_lun = -1;
4275 for (j = 0; j < CISS_MAX_LUN; j++) {
4276 hba[i]->drv[j].raid_level = -1;
4277 hba[i]->drv[j].queue = NULL;
4278 hba[i]->gendisk[j] = NULL;
4279 }
1da177e4
LT		 4280
4281 cciss_scsi_setup(i);
4282
4283 /* Turn the interrupts on so we can service requests */
4284 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4285
22bece00
MM		 4286 /* Get the firmware version */
4287 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4288 if (inq_buff == NULL) {
4289 printk(KERN_ERR "cciss: out of memory\n");
4290 goto clean4;
4291 }
4292
4293 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4294 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4295 if (return_code == IO_OK) {
4296 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4297 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4298 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4299 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4300 } else { /* send command failed */
4301 printk(KERN_WARNING "cciss: unable to determine firmware"
4302 " version of controller\n");
4303 }
212a5026 4304 kfree(inq_buff);
22bece00 4305
1da177e4 4306 cciss_procinit(i);
92c4231a
MM		 4307
4308 hba[i]->cciss_max_sectors = 2048;
4309
2d11d993 4310 rebuild_lun_table(hba[i], 1, 0);
b368c9dd 4311 hba[i]->busy_initializing = 0;
e2019b58 4312 return 1;
1da177e4 4313
6ae5ce8e 4314clean4:
6044ec88 4315 kfree(hba[i]->cmd_pool_bits);
7c832835 4316 if (hba[i]->cmd_pool)
1da177e4 4317 pci_free_consistent(hba[i]->pdev,
f880632f 4318 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4319 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4320 if (hba[i]->errinfo_pool)
1da177e4 4321 pci_free_consistent(hba[i]->pdev,
f880632f 4322 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4323 hba[i]->errinfo_pool,
4324 hba[i]->errinfo_pool_dhandle);
fb86a35b 4325 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4326clean2:
1da177e4 4327 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4328clean1:
7fe06326
AP		 4329 cciss_destroy_hba_sysfs_entry(hba[i]);
4330clean0:
1f8ef380 4331 hba[i]->busy_initializing = 0;
799202cb
MM		 4332 /* cleanup any queues that may have been initialized */
4333 for (j=0; j <= hba[i]->highest_lun; j++){
4334 drive_info_struct *drv = &(hba[i]->drv[j]);
4335 if (drv->queue)
4336 blk_cleanup_queue(drv->queue);
4337 }
872225ca
MM		 4338 /*
4339 * Deliberately omit pci_disable_device(): it does something nasty to
4340 * Smart Array controllers that pci_enable_device does not undo
4341 */
799202cb 4342 pci_release_regions(pdev);
799202cb 4343 pci_set_drvdata(pdev, NULL);
61808c2b 4344 free_hba(i);
e2019b58 4345 return -1;
1da177e4
LT		 4346}
4347
e9ca75b5 4348static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4349{
4350 ctlr_info_t *tmp_ptr;
e9ca75b5 4351 int i;
1da177e4 4352 char flush_buf[4];
7c832835 4353 int return_code;
1da177e4 4354
e9ca75b5
GB		 4355 tmp_ptr = pci_get_drvdata(pdev);
4356 if (tmp_ptr == NULL)
4357 return;
4358 i = tmp_ptr->ctlr;
4359 if (hba[i] == NULL)
4360 return;
4361
4362 /* Turn board interrupts off and send the flush cache command */
4363 /* sendcmd will turn off interrupt, and send the flush...
4364 * To write all data in the battery backed cache to disks */
4365 memset(flush_buf, 0, 4);
b57695fe 4366 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4367 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4368 if (return_code == IO_OK) {
4369 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4370 } else {
4371 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4372 }
4373 free_irq(hba[i]->intr[2], hba[i]);
4374}
4375
4376static void __devexit cciss_remove_one(struct pci_dev *pdev)
4377{
4378 ctlr_info_t *tmp_ptr;
4379 int i, j;
4380
7c832835
BH		 4381 if (pci_get_drvdata(pdev) == NULL) {
4382 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4383 return;
4384 }
0a9279cc 4385
1da177e4
LT		 4386 tmp_ptr = pci_get_drvdata(pdev);
4387 i = tmp_ptr->ctlr;
7c832835 4388 if (hba[i] == NULL) {
1da177e4 4389 printk(KERN_ERR "cciss: device appears to "
7c832835 4390 "already be removed \n");
1da177e4
LT		 4391 return;
4392 }
b6550777 4393
b368c9dd 4394 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4395
b368c9dd 4396 remove_from_scan_list(hba[i]);
b6550777
BH		 4397 remove_proc_entry(hba[i]->devname, proc_cciss);
4398 unregister_blkdev(hba[i]->major, hba[i]->devname);
4399
4400 /* remove it from the disk list */
4401 for (j = 0; j < CISS_MAX_LUN; j++) {
4402 struct gendisk *disk = hba[i]->gendisk[j];
4403 if (disk) {
165125e1 4404 struct request_queue *q = disk->queue;
b6550777 4405
097d0264 4406 if (disk->flags & GENHD_FL_UP) {
8ce51966 4407 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4408 del_gendisk(disk);
097d0264 4409 }
b6550777
BH		 4410 if (q)
4411 blk_cleanup_queue(q);
4412 }
4413 }
4414
ba198efb 4415#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4416 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4417#endif
b6550777 4418
e9ca75b5 4419 cciss_shutdown(pdev);
fb86a35b
MM		 4420
4421#ifdef CONFIG_PCI_MSI
7c832835
BH		 4422 if (hba[i]->msix_vector)
4423 pci_disable_msix(hba[i]->pdev);
4424 else if (hba[i]->msi_vector)
4425 pci_disable_msi(hba[i]->pdev);
4426#endif /* CONFIG_PCI_MSI */
fb86a35b 4427
1da177e4 4428 iounmap(hba[i]->vaddr);
1da177e4 4429
f880632f 4430 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4431 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4432 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4433 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4434 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4435 /*
4436 * Deliberately omit pci_disable_device(): it does something nasty to
4437 * Smart Array controllers that pci_enable_device does not undo
4438 */
7c832835 4439 pci_release_regions(pdev);
4e570309 4440 pci_set_drvdata(pdev, NULL);
7fe06326 4441 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4442 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4443 free_hba(i);
7c832835 4444}
1da177e4
LT		 4445
4446static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4447 .name = "cciss",
4448 .probe = cciss_init_one,
4449 .remove = __devexit_p(cciss_remove_one),
4450 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4451 .shutdown = cciss_shutdown,
1da177e4
LT		 4452};
4453
4454/*
4455 * This is it. Register the PCI driver information for the cards we control
7c832835 4456 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4457 */
4458static int __init cciss_init(void)
4459{
7fe06326
AP		 4460 int err;
4461
10cbda97
JA		 4462 /*
4463 * The hardware requires that commands are aligned on a 64-bit
4464 * boundary. Given that we use pci_alloc_consistent() to allocate an
4465 * array of them, the size must be a multiple of 8 bytes.
4466 */
4467 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4468
1da177e4
LT		 4469 printk(KERN_INFO DRIVER_NAME "\n");
4470
7fe06326
AP		 4471 err = bus_register(&cciss_bus_type);
4472 if (err)
4473 return err;
4474
b368c9dd
AP		 4475 /* Start the scan thread */
4476 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4477 if (IS_ERR(cciss_scan_thread)) {
4478 err = PTR_ERR(cciss_scan_thread);
4479 goto err_bus_unregister;
4480 }
4481
1da177e4 4482 /* Register for our PCI devices */
7fe06326
AP		 4483 err = pci_register_driver(&cciss_pci_driver);
4484 if (err)
b368c9dd 4485 goto err_thread_stop;
7fe06326 4486
617e1344 4487 return err;
7fe06326 4488
b368c9dd
AP		 4489err_thread_stop:
4490 kthread_stop(cciss_scan_thread);
4491err_bus_unregister:
7fe06326 4492 bus_unregister(&cciss_bus_type);
b368c9dd 4493
7fe06326 4494 return err;
1da177e4
LT		 4495}
4496
4497static void __exit cciss_cleanup(void)
4498{
4499 int i;
4500
4501 pci_unregister_driver(&cciss_pci_driver);
4502 /* double check that all controller entrys have been removed */
7c832835
BH		 4503 for (i = 0; i < MAX_CTLR; i++) {
4504 if (hba[i] != NULL) {
1da177e4 4505 printk(KERN_WARNING "cciss: had to remove"
7c832835 4506 " controller %d\n", i);
1da177e4
LT		 4507 cciss_remove_one(hba[i]->pdev);
4508 }
4509 }
b368c9dd 4510 kthread_stop(cciss_scan_thread);
928b4d8c 4511 remove_proc_entry("driver/cciss", NULL);
7fe06326 4512 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4513}
4514
33079b21
MM		 4515static void fail_all_cmds(unsigned long ctlr)
4516{
4517 /* If we get here, the board is apparently dead. */
4518 ctlr_info_t *h = hba[ctlr];
4519 CommandList_struct *c;
4520 unsigned long flags;
4521
4522 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4523 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4524
4525 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4526
7c832835 4527 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4528
4529 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4530 while (!hlist_empty(&h->reqQ)) {
4531 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4532 removeQ(c);
33079b21 4533 h->Qdepth--;
8a3173de 4534 addQ(&h->cmpQ, c);
33079b21
MM		 4535 }
4536
4537 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4538 while (!hlist_empty(&h->cmpQ)) {
4539 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4540 removeQ(c);
b59e64d0
HR		 4541 if (c->cmd_type != CMD_MSG_STALE)
4542 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4543 if (c->cmd_type == CMD_RWREQ) {
4544 complete_command(h, c, 0);
4545 } else if (c->cmd_type == CMD_IOCTL_PEND)
4546 complete(c->waiting);
4547#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4548 else if (c->cmd_type == CMD_SCSI)
4549 complete_scsi_command(c, 0, 0);
33079b21
MM		 4550#endif
4551 }
4552 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4553 return;
4554}
4555
1da177e4
LT		 4556module_init(cciss_init);
4557module_exit(cciss_cleanup);
Linux kernel - Deliverables
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