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cciss: Add lunid 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
0f5486ec
RD		 258#define RAID_UNKNOWN 6
259
1da177e4
LT		 260#ifdef CONFIG_PROC_FS
261
262/*
263 * Report information about this controller.
264 */
265#define ENG_GIG 1000000000
266#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 267#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 268static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
269 "UNKNOWN"
270};
1da177e4
LT		 271
272static struct proc_dir_entry *proc_cciss;
273
89b6e743 274static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 275{
89b6e743
MM		 276 ctlr_info_t *h = seq->private;
277
278 seq_printf(seq, "%s: HP %s Controller\n"
279 "Board ID: 0x%08lx\n"
280 "Firmware Version: %c%c%c%c\n"
281 "IRQ: %d\n"
282 "Logical drives: %d\n"
283 "Current Q depth: %d\n"
284 "Current # commands on controller: %d\n"
285 "Max Q depth since init: %d\n"
286 "Max # commands on controller since init: %d\n"
287 "Max SG entries since init: %d\n",
288 h->devname,
289 h->product_name,
290 (unsigned long)h->board_id,
291 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
292 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
293 h->num_luns,
294 h->Qdepth, h->commands_outstanding,
295 h->maxQsinceinit, h->max_outstanding, h->maxSG);
296
297#ifdef CONFIG_CISS_SCSI_TAPE
298 cciss_seq_tape_report(seq, h->ctlr);
299#endif /* CONFIG_CISS_SCSI_TAPE */
300}
1da177e4 301
89b6e743
MM		 302static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
303{
304 ctlr_info_t *h = seq->private;
305 unsigned ctlr = h->ctlr;
306 unsigned long flags;
1da177e4
LT		 307
308 /* prevent displaying bogus info during configuration
309 * or deconfiguration of a logical volume
310 */
311 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
312 if (h->busy_configuring) {
313 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 314 return ERR_PTR(-EBUSY);
1da177e4
LT		 315 }
316 h->busy_configuring = 1;
317 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
318
89b6e743
MM		 319 if (*pos == 0)
320 cciss_seq_show_header(seq);
321
322 return pos;
323}
324
325static int cciss_seq_show(struct seq_file *seq, void *v)
326{
327 sector_t vol_sz, vol_sz_frac;
328 ctlr_info_t *h = seq->private;
329 unsigned ctlr = h->ctlr;
330 loff_t *pos = v;
331 drive_info_struct *drv = &h->drv[*pos];
332
333 if (*pos > h->highest_lun)
334 return 0;
335
336 if (drv->heads == 0)
337 return 0;
338
339 vol_sz = drv->nr_blocks;
340 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
341 vol_sz_frac *= 100;
342 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
343
344 if (drv->raid_level > 5)
345 drv->raid_level = RAID_UNKNOWN;
346 seq_printf(seq, "cciss/c%dd%d:"
347 "\t%4u.%02uGB\tRAID %s\n",
348 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
349 raid_label[drv->raid_level]);
350 return 0;
351}
352
353static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
354{
355 ctlr_info_t *h = seq->private;
356
357 if (*pos > h->highest_lun)
358 return NULL;
359 *pos += 1;
360
361 return pos;
362}
363
364static void cciss_seq_stop(struct seq_file *seq, void *v)
365{
366 ctlr_info_t *h = seq->private;
367
368 /* Only reset h->busy_configuring if we succeeded in setting
369 * it during cciss_seq_start. */
370 if (v == ERR_PTR(-EBUSY))
371 return;
7c832835 372
1da177e4 373 h->busy_configuring = 0;
1da177e4
LT		 374}
375
88e9d34c 376static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 377 .start = cciss_seq_start,
378 .show = cciss_seq_show,
379 .next = cciss_seq_next,
380 .stop = cciss_seq_stop,
381};
382
383static int cciss_seq_open(struct inode *inode, struct file *file)
384{
385 int ret = seq_open(file, &cciss_seq_ops);
386 struct seq_file *seq = file->private_data;
387
388 if (!ret)
389 seq->private = PDE(inode)->data;
390
391 return ret;
392}
393
394static ssize_t
395cciss_proc_write(struct file *file, const char __user *buf,
396 size_t length, loff_t *ppos)
1da177e4 397{
89b6e743
MM		 398 int err;
399 char *buffer;
400
401#ifndef CONFIG_CISS_SCSI_TAPE
402 return -EINVAL;
1da177e4
LT		 403#endif
404
89b6e743 405 if (!buf || length > PAGE_SIZE - 1)
7c832835 406 return -EINVAL;
89b6e743
MM		 407
408 buffer = (char *)__get_free_page(GFP_KERNEL);
409 if (!buffer)
410 return -ENOMEM;
411
412 err = -EFAULT;
413 if (copy_from_user(buffer, buf, length))
414 goto out;
415 buffer[length] = '\0';
416
417#ifdef CONFIG_CISS_SCSI_TAPE
418 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
419 struct seq_file *seq = file->private_data;
420 ctlr_info_t *h = seq->private;
421 int rc;
422
7c832835
BH		 423 rc = cciss_engage_scsi(h->ctlr);
424 if (rc != 0)
89b6e743
MM		 425 err = -rc;
426 else
427 err = length;
428 } else
429#endif /* CONFIG_CISS_SCSI_TAPE */
430 err = -EINVAL;
7c832835
BH		 431 /* might be nice to have "disengage" too, but it's not
432 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 433
434out:
435 free_page((unsigned long)buffer);
436 return err;
1da177e4
LT		 437}
438
89b6e743
MM		 439static struct file_operations cciss_proc_fops = {
440 .owner = THIS_MODULE,
441 .open = cciss_seq_open,
442 .read = seq_read,
443 .llseek = seq_lseek,
444 .release = seq_release,
445 .write = cciss_proc_write,
446};
447
1da177e4
LT		 448static void __devinit cciss_procinit(int i)
449{
450 struct proc_dir_entry *pde;
451
89b6e743 452 if (proc_cciss == NULL)
928b4d8c 453 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 454 if (!proc_cciss)
455 return;
3dfcf9c4 456 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 457 S_IROTH, proc_cciss,
3dfcf9c4 458 &cciss_proc_fops, hba[i]);
1da177e4 459}
7c832835 460#endif /* CONFIG_PROC_FS */
1da177e4 461
7fe06326
AP		 462#define MAX_PRODUCT_NAME_LEN 19
463
464#define to_hba(n) container_of(n, struct ctlr_info, dev)
7fe06326 465
d6f4965d
AP		 466static ssize_t host_store_rescan(struct device *dev,
467 struct device_attribute *attr,
468 const char *buf, size_t count)
469{
470 struct ctlr_info *h = to_hba(dev);
471
472 add_to_scan_list(h);
473 wake_up_process(cciss_scan_thread);
474 wait_for_completion_interruptible(&h->scan_wait);
475
476 return count;
477}
478DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 479
480static ssize_t dev_show_unique_id(struct device *dev,
481 struct device_attribute *attr,
482 char *buf)
483{
617e1344
SC		 484 drive_info_struct *drv = dev_get_drvdata(dev);
485 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 486 __u8 sn[16];
487 unsigned long flags;
488 int ret = 0;
489
490 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
491 if (h->busy_configuring)
492 ret = -EBUSY;
493 else
494 memcpy(sn, drv->serial_no, sizeof(sn));
495 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
496
497 if (ret)
498 return ret;
499 else
500 return snprintf(buf, 16 * 2 + 2,
501 "%02X%02X%02X%02X%02X%02X%02X%02X"
502 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
503 sn[0], sn[1], sn[2], sn[3],
504 sn[4], sn[5], sn[6], sn[7],
505 sn[8], sn[9], sn[10], sn[11],
506 sn[12], sn[13], sn[14], sn[15]);
507}
508DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
509
510static ssize_t dev_show_vendor(struct device *dev,
511 struct device_attribute *attr,
512 char *buf)
513{
617e1344
SC		 514 drive_info_struct *drv = dev_get_drvdata(dev);
515 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 516 char vendor[VENDOR_LEN + 1];
517 unsigned long flags;
518 int ret = 0;
519
520 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
521 if (h->busy_configuring)
522 ret = -EBUSY;
523 else
524 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
525 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
526
527 if (ret)
528 return ret;
529 else
530 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
531}
532DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
533
534static ssize_t dev_show_model(struct device *dev,
535 struct device_attribute *attr,
536 char *buf)
537{
617e1344
SC		 538 drive_info_struct *drv = dev_get_drvdata(dev);
539 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 540 char model[MODEL_LEN + 1];
541 unsigned long flags;
542 int ret = 0;
543
544 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
545 if (h->busy_configuring)
546 ret = -EBUSY;
547 else
548 memcpy(model, drv->model, MODEL_LEN + 1);
549 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
550
551 if (ret)
552 return ret;
553 else
554 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
555}
556DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
557
558static ssize_t dev_show_rev(struct device *dev,
559 struct device_attribute *attr,
560 char *buf)
561{
617e1344
SC		 562 drive_info_struct *drv = dev_get_drvdata(dev);
563 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 564 char rev[REV_LEN + 1];
565 unsigned long flags;
566 int ret = 0;
567
568 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
569 if (h->busy_configuring)
570 ret = -EBUSY;
571 else
572 memcpy(rev, drv->rev, REV_LEN + 1);
573 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
574
575 if (ret)
576 return ret;
577 else
578 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
579}
580DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
581
ce84a8ae
SC		 582static ssize_t cciss_show_lunid(struct device *dev,
583 struct device_attribute *attr, char *buf)
584{
585 drive_info_struct *drv = dev_get_drvdata(dev);
586 struct ctlr_info *h = to_hba(drv->dev->parent);
587 unsigned long flags;
588 unsigned char lunid[8];
589
590 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
591 if (h->busy_configuring) {
592 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
593 return -EBUSY;
594 }
595 if (!drv->heads) {
596 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
597 return -ENOTTY;
598 }
599 memcpy(lunid, drv->LunID, sizeof(lunid));
600 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
601 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
602 lunid[0], lunid[1], lunid[2], lunid[3],
603 lunid[4], lunid[5], lunid[6], lunid[7]);
604}
605DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
606
d6f4965d
AP		 607static struct attribute *cciss_host_attrs[] = {
608 &dev_attr_rescan.attr,
609 NULL
610};
611
612static struct attribute_group cciss_host_attr_group = {
613 .attrs = cciss_host_attrs,
614};
615
616static struct attribute_group *cciss_host_attr_groups[] = {
617 &cciss_host_attr_group,
618 NULL
619};
620
621static struct device_type cciss_host_type = {
622 .name = "cciss_host",
623 .groups = cciss_host_attr_groups,
617e1344 624 .release = cciss_hba_release,
d6f4965d
AP		 625};
626
7fe06326
AP		 627static struct attribute *cciss_dev_attrs[] = {
628 &dev_attr_unique_id.attr,
629 &dev_attr_model.attr,
630 &dev_attr_vendor.attr,
631 &dev_attr_rev.attr,
ce84a8ae 632 &dev_attr_lunid.attr,
7fe06326
AP		 633 NULL
634};
635
636static struct attribute_group cciss_dev_attr_group = {
637 .attrs = cciss_dev_attrs,
638};
639
a4dbd674 640static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 641 &cciss_dev_attr_group,
642 NULL
643};
644
645static struct device_type cciss_dev_type = {
646 .name = "cciss_device",
647 .groups = cciss_dev_attr_groups,
617e1344 648 .release = cciss_device_release,
7fe06326
AP		 649};
650
651static struct bus_type cciss_bus_type = {
652 .name = "cciss",
653};
654
617e1344
SC		 655/*
656 * cciss_hba_release is called when the reference count
657 * of h->dev goes to zero.
658 */
659static void cciss_hba_release(struct device *dev)
660{
661 /*
662 * nothing to do, but need this to avoid a warning
663 * about not having a release handler from lib/kref.c.
664 */
665}
7fe06326
AP		 666
667/*
668 * Initialize sysfs entry for each controller. This sets up and registers
669 * the 'cciss#' directory for each individual controller under
670 * /sys/bus/pci/devices/<dev>/.
671 */
672static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
673{
674 device_initialize(&h->dev);
675 h->dev.type = &cciss_host_type;
676 h->dev.bus = &cciss_bus_type;
677 dev_set_name(&h->dev, "%s", h->devname);
678 h->dev.parent = &h->pdev->dev;
679
680 return device_add(&h->dev);
681}
682
683/*
684 * Remove sysfs entries for an hba.
685 */
686static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
687{
688 device_del(&h->dev);
617e1344
SC		 689 put_device(&h->dev); /* final put. */
690}
691
692/* cciss_device_release is called when the reference count
693 * of h->drv[x].dev goes to zero.
694 */
695static void cciss_device_release(struct device *dev)
696{
697 kfree(dev);
7fe06326
AP		 698}
699
700/*
701 * Initialize sysfs for each logical drive. This sets up and registers
702 * the 'c#d#' directory for each individual logical drive under
703 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
704 * /sys/block/cciss!c#d# to this entry.
705 */
617e1344 706static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 707 int drv_index)
708{
617e1344
SC		 709 struct device *dev;
710
8ce51966
SC		 711 /* Special case for c*d0, we only create it once. */
712 if (drv_index == 0 && h->drv[drv_index].dev != NULL)
713 return 0;
714
617e1344
SC		 715 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
716 if (!dev)
717 return -ENOMEM;
718 device_initialize(dev);
719 dev->type = &cciss_dev_type;
720 dev->bus = &cciss_bus_type;
721 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
722 dev->parent = &h->dev;
723 h->drv[drv_index].dev = dev;
724 dev_set_drvdata(dev, &h->drv[drv_index]);
725 return device_add(dev);
7fe06326
AP		 726}
727
728/*
729 * Remove sysfs entries for a logical drive.
730 */
8ce51966
SC		 731static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
732 int ctlr_exiting)
7fe06326 733{
617e1344 734 struct device *dev = h->drv[drv_index].dev;
8ce51966
SC		 735
736 /* special case for c*d0, we only destroy it on controller exit */
737 if (drv_index == 0 && !ctlr_exiting)
738 return;
739
617e1344
SC		 740 device_del(dev);
741 put_device(dev); /* the "final" put. */
742 h->drv[drv_index].dev = NULL;
7fe06326
AP		 743}
744
7c832835
BH		 745/*
746 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 747 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 748 * which ones are free or in use. For operations that can wait for kmalloc
749 * to possible sleep, this routine can be called with get_from_pool set to 0.
750 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
751 */
752static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 753{
754 CommandList_struct *c;
7c832835 755 int i;
1da177e4
LT		 756 u64bit temp64;
757 dma_addr_t cmd_dma_handle, err_dma_handle;
758
7c832835
BH		 759 if (!get_from_pool) {
760 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
761 sizeof(CommandList_struct), &cmd_dma_handle);
762 if (c == NULL)
763 return NULL;
1da177e4
LT		 764 memset(c, 0, sizeof(CommandList_struct));
765
33079b21
MM		 766 c->cmdindex = -1;
767
7c832835
BH		 768 c->err_info = (ErrorInfo_struct *)
769 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
770 &err_dma_handle);
771
772 if (c->err_info == NULL) {
773 pci_free_consistent(h->pdev,
1da177e4
LT		 774 sizeof(CommandList_struct), c, cmd_dma_handle);
775 return NULL;
776 }
777 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 778 } else { /* get it out of the controllers pool */
779
780 do {
f880632f
MM		 781 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
782 if (i == h->nr_cmds)
7c832835
BH		 783 return NULL;
784 } while (test_and_set_bit
785 (i & (BITS_PER_LONG - 1),
786 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 787#ifdef CCISS_DEBUG
788 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
789#endif
7c832835 790 c = h->cmd_pool + i;
1da177e4 791 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 792 cmd_dma_handle = h->cmd_pool_dhandle
793 + i * sizeof(CommandList_struct);
1da177e4
LT		 794 c->err_info = h->errinfo_pool + i;
795 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 796 err_dma_handle = h->errinfo_pool_dhandle
797 + i * sizeof(ErrorInfo_struct);
798 h->nr_allocs++;
33079b21
MM		 799
800 c->cmdindex = i;
7c832835 801 }
1da177e4 802
8a3173de 803 INIT_HLIST_NODE(&c->list);
1da177e4 804 c->busaddr = (__u32) cmd_dma_handle;
7c832835 805 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 806 c->ErrDesc.Addr.lower = temp64.val32.lower;
807 c->ErrDesc.Addr.upper = temp64.val32.upper;
808 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 809
7c832835
BH		 810 c->ctlr = h->ctlr;
811 return c;
1da177e4
LT		 812}
813
7c832835
BH		 814/*
815 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 816 */
817static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
818{
819 int i;
820 u64bit temp64;
821
7c832835 822 if (!got_from_pool) {
1da177e4
LT		 823 temp64.val32.lower = c->ErrDesc.Addr.lower;
824 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 825 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
826 c->err_info, (dma_addr_t) temp64.val);
827 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
828 c, (dma_addr_t) c->busaddr);
829 } else {
1da177e4 830 i = c - h->cmd_pool;
7c832835
BH		 831 clear_bit(i & (BITS_PER_LONG - 1),
832 h->cmd_pool_bits + (i / BITS_PER_LONG));
833 h->nr_frees++;
834 }
1da177e4
LT		 835}
836
837static inline ctlr_info_t *get_host(struct gendisk *disk)
838{
7c832835 839 return disk->queue->queuedata;
1da177e4
LT		 840}
841
842static inline drive_info_struct *get_drv(struct gendisk *disk)
843{
844 return disk->private_data;
845}
846
847/*
848 * Open. Make sure the device is really there.
849 */
ef7822c2 850static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 851{
ef7822c2
AV		 852 ctlr_info_t *host = get_host(bdev->bd_disk);
853 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 854
855#ifdef CCISS_DEBUG
ef7822c2 856 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 857#endif /* CCISS_DEBUG */
1da177e4 858
2e043986 859 if (drv->busy_configuring)
ddd47442 860 return -EBUSY;
1da177e4
LT		 861 /*
862 * Root is allowed to open raw volume zero even if it's not configured
863 * so array config can still work. Root is also allowed to open any
864 * volume that has a LUN ID, so it can issue IOCTL to reread the
865 * disk information. I don't think I really like this
866 * but I'm already using way to many device nodes to claim another one
867 * for "raw controller".
868 */
7a06f789 869 if (drv->heads == 0) {
ef7822c2 870 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 871 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 872 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 873 return -ENXIO;
1da177e4 874 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 875 } else if (memcmp(drv->LunID, CTLR_LUNID,
876 sizeof(drv->LunID))) {
1da177e4
LT		 877 return -ENXIO;
878 }
879 }
880 if (!capable(CAP_SYS_ADMIN))
881 return -EPERM;
882 }
883 drv->usage_count++;
884 host->usage_count++;
885 return 0;
886}
7c832835 887
1da177e4
LT		 888/*
889 * Close. Sync first.
890 */
ef7822c2 891static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 892{
ef7822c2
AV		 893 ctlr_info_t *host = get_host(disk);
894 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 895
896#ifdef CCISS_DEBUG
ef7822c2 897 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 898#endif /* CCISS_DEBUG */
1da177e4
LT		 899
900 drv->usage_count--;
901 host->usage_count--;
902 return 0;
903}
904
905#ifdef CONFIG_COMPAT
906
ef7822c2
AV		 907static int do_ioctl(struct block_device *bdev, fmode_t mode,
908 unsigned cmd, unsigned long arg)
1da177e4
LT		 909{
910 int ret;
911 lock_kernel();
ef7822c2 912 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 913 unlock_kernel();
914 return ret;
915}
916
ef7822c2
AV		 917static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
918 unsigned cmd, unsigned long arg);
919static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
920 unsigned cmd, unsigned long arg);
1da177e4 921
ef7822c2
AV		 922static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
923 unsigned cmd, unsigned long arg)
1da177e4
LT		 924{
925 switch (cmd) {
926 case CCISS_GETPCIINFO:
927 case CCISS_GETINTINFO:
928 case CCISS_SETINTINFO:
929 case CCISS_GETNODENAME:
930 case CCISS_SETNODENAME:
931 case CCISS_GETHEARTBEAT:
932 case CCISS_GETBUSTYPES:
933 case CCISS_GETFIRMVER:
934 case CCISS_GETDRIVVER:
935 case CCISS_REVALIDVOLS:
936 case CCISS_DEREGDISK:
937 case CCISS_REGNEWDISK:
938 case CCISS_REGNEWD:
939 case CCISS_RESCANDISK:
940 case CCISS_GETLUNINFO:
ef7822c2 941 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 942
943 case CCISS_PASSTHRU32:
ef7822c2 944 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 945 case CCISS_BIG_PASSTHRU32:
ef7822c2 946 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 947
948 default:
949 return -ENOIOCTLCMD;
950 }
951}
952
ef7822c2
AV		 953static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
954 unsigned cmd, unsigned long arg)
1da177e4
LT		 955{
956 IOCTL32_Command_struct __user *arg32 =
7c832835 957 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 958 IOCTL_Command_struct arg64;
959 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
960 int err;
961 u32 cp;
962
963 err = 0;
7c832835
BH		 964 err |=
965 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
966 sizeof(arg64.LUN_info));
967 err |=
968 copy_from_user(&arg64.Request, &arg32->Request,
969 sizeof(arg64.Request));
970 err |=
971 copy_from_user(&arg64.error_info, &arg32->error_info,
972 sizeof(arg64.error_info));
1da177e4
LT		 973 err |= get_user(arg64.buf_size, &arg32->buf_size);
974 err |= get_user(cp, &arg32->buf);
975 arg64.buf = compat_ptr(cp);
976 err |= copy_to_user(p, &arg64, sizeof(arg64));
977
978 if (err)
979 return -EFAULT;
980
ef7822c2 981 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 982 if (err)
983 return err;
7c832835
BH		 984 err |=
985 copy_in_user(&arg32->error_info, &p->error_info,
986 sizeof(arg32->error_info));
1da177e4
LT		 987 if (err)
988 return -EFAULT;
989 return err;
990}
991
ef7822c2
AV		 992static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
993 unsigned cmd, unsigned long arg)
1da177e4
LT		 994{
995 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 996 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 997 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 998 BIG_IOCTL_Command_struct __user *p =
999 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1000 int err;
1001 u32 cp;
1002
1003 err = 0;
7c832835
BH		 1004 err |=
1005 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1006 sizeof(arg64.LUN_info));
1007 err |=
1008 copy_from_user(&arg64.Request, &arg32->Request,
1009 sizeof(arg64.Request));
1010 err |=
1011 copy_from_user(&arg64.error_info, &arg32->error_info,
1012 sizeof(arg64.error_info));
1da177e4
LT		 1013 err |= get_user(arg64.buf_size, &arg32->buf_size);
1014 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1015 err |= get_user(cp, &arg32->buf);
1016 arg64.buf = compat_ptr(cp);
1017 err |= copy_to_user(p, &arg64, sizeof(arg64));
1018
1019 if (err)
7c832835 1020 return -EFAULT;
1da177e4 1021
ef7822c2 1022 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1023 if (err)
1024 return err;
7c832835
BH		 1025 err |=
1026 copy_in_user(&arg32->error_info, &p->error_info,
1027 sizeof(arg32->error_info));
1da177e4
LT		 1028 if (err)
1029 return -EFAULT;
1030 return err;
1031}
1032#endif
a885c8c4
CH		 1033
1034static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1035{
1036 drive_info_struct *drv = get_drv(bdev->bd_disk);
1037
1038 if (!drv->cylinders)
1039 return -ENXIO;
1040
1041 geo->heads = drv->heads;
1042 geo->sectors = drv->sectors;
1043 geo->cylinders = drv->cylinders;
1044 return 0;
1045}
1046
0a9279cc
MM		 1047static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1048{
1049 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1050 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1051 (void)check_for_unit_attention(host, c);
1052}
1da177e4 1053/*
7c832835 1054 * ioctl
1da177e4 1055 */
ef7822c2 1056static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1057 unsigned int cmd, unsigned long arg)
1da177e4 1058{
1da177e4
LT		 1059 struct gendisk *disk = bdev->bd_disk;
1060 ctlr_info_t *host = get_host(disk);
1061 drive_info_struct *drv = get_drv(disk);
1062 int ctlr = host->ctlr;
1063 void __user *argp = (void __user *)arg;
1064
1065#ifdef CCISS_DEBUG
1066 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1067#endif /* CCISS_DEBUG */
1068
1069 switch (cmd) {
1da177e4 1070 case CCISS_GETPCIINFO:
7c832835
BH		 1071 {
1072 cciss_pci_info_struct pciinfo;
1073
1074 if (!arg)
1075 return -EINVAL;
1076 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1077 pciinfo.bus = host->pdev->bus->number;
1078 pciinfo.dev_fn = host->pdev->devfn;
1079 pciinfo.board_id = host->board_id;
1080 if (copy_to_user
1081 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1082 return -EFAULT;
1083 return 0;
1084 }
1da177e4 1085 case CCISS_GETINTINFO:
7c832835
BH		 1086 {
1087 cciss_coalint_struct intinfo;
1088 if (!arg)
1089 return -EINVAL;
1090 intinfo.delay =
1091 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1092 intinfo.count =
1093 readl(&host->cfgtable->HostWrite.CoalIntCount);
1094 if (copy_to_user
1095 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1096 return -EFAULT;
1097 return 0;
1098 }
1da177e4 1099 case CCISS_SETINTINFO:
1da177e4 1100 {
7c832835
BH		 1101 cciss_coalint_struct intinfo;
1102 unsigned long flags;
1103 int i;
1104
1105 if (!arg)
1106 return -EINVAL;
1107 if (!capable(CAP_SYS_ADMIN))
1108 return -EPERM;
1109 if (copy_from_user
1110 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1111 return -EFAULT;
1112 if ((intinfo.delay == 0) && (intinfo.count == 0))
1113 {
1114// printk("cciss_ioctl: delay and count cannot be 0\n");
1115 return -EINVAL;
1116 }
1117 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1118 /* Update the field, and then ring the doorbell */
1119 writel(intinfo.delay,
1120 &(host->cfgtable->HostWrite.CoalIntDelay));
1121 writel(intinfo.count,
1122 &(host->cfgtable->HostWrite.CoalIntCount));
1123 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1124
1125 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1126 if (!(readl(host->vaddr + SA5_DOORBELL)
1127 & CFGTBL_ChangeReq))
1128 break;
1129 /* delay and try again */
1130 udelay(1000);
1131 }
1132 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1133 if (i >= MAX_IOCTL_CONFIG_WAIT)
1134 return -EAGAIN;
1135 return 0;
1da177e4 1136 }
1da177e4 1137 case CCISS_GETNODENAME:
7c832835
BH		 1138 {
1139 NodeName_type NodeName;
1140 int i;
1141
1142 if (!arg)
1143 return -EINVAL;
1144 for (i = 0; i < 16; i++)
1145 NodeName[i] =
1146 readb(&host->cfgtable->ServerName[i]);
1147 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1148 return -EFAULT;
1149 return 0;
1150 }
1da177e4 1151 case CCISS_SETNODENAME:
7c832835
BH		 1152 {
1153 NodeName_type NodeName;
1154 unsigned long flags;
1155 int i;
1156
1157 if (!arg)
1158 return -EINVAL;
1159 if (!capable(CAP_SYS_ADMIN))
1160 return -EPERM;
1161
1162 if (copy_from_user
1163 (NodeName, argp, sizeof(NodeName_type)))
1164 return -EFAULT;
1165
1166 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1167
1168 /* Update the field, and then ring the doorbell */
1169 for (i = 0; i < 16; i++)
1170 writeb(NodeName[i],
1171 &host->cfgtable->ServerName[i]);
1172
1173 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1174
1175 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1176 if (!(readl(host->vaddr + SA5_DOORBELL)
1177 & CFGTBL_ChangeReq))
1178 break;
1179 /* delay and try again */
1180 udelay(1000);
1181 }
1182 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1183 if (i >= MAX_IOCTL_CONFIG_WAIT)
1184 return -EAGAIN;
1185 return 0;
1186 }
1da177e4
LT		 1187
1188 case CCISS_GETHEARTBEAT:
7c832835
BH		 1189 {
1190 Heartbeat_type heartbeat;
1191
1192 if (!arg)
1193 return -EINVAL;
1194 heartbeat = readl(&host->cfgtable->HeartBeat);
1195 if (copy_to_user
1196 (argp, &heartbeat, sizeof(Heartbeat_type)))
1197 return -EFAULT;
1198 return 0;
1199 }
1da177e4 1200 case CCISS_GETBUSTYPES:
7c832835
BH		 1201 {
1202 BusTypes_type BusTypes;
1203
1204 if (!arg)
1205 return -EINVAL;
1206 BusTypes = readl(&host->cfgtable->BusTypes);
1207 if (copy_to_user
1208 (argp, &BusTypes, sizeof(BusTypes_type)))
1209 return -EFAULT;
1210 return 0;
1211 }
1da177e4 1212 case CCISS_GETFIRMVER:
7c832835
BH		 1213 {
1214 FirmwareVer_type firmware;
1da177e4 1215
7c832835
BH		 1216 if (!arg)
1217 return -EINVAL;
1218 memcpy(firmware, host->firm_ver, 4);
1da177e4 1219
7c832835
BH		 1220 if (copy_to_user
1221 (argp, firmware, sizeof(FirmwareVer_type)))
1222 return -EFAULT;
1223 return 0;
1224 }
1225 case CCISS_GETDRIVVER:
1226 {
1227 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1228
7c832835
BH		 1229 if (!arg)
1230 return -EINVAL;
1da177e4 1231
7c832835
BH		 1232 if (copy_to_user
1233 (argp, &DriverVer, sizeof(DriverVer_type)))
1234 return -EFAULT;
1235 return 0;
1236 }
1da177e4 1237
6ae5ce8e
MM		 1238 case CCISS_DEREGDISK:
1239 case CCISS_REGNEWD:
1da177e4 1240 case CCISS_REVALIDVOLS:
2d11d993 1241 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1242
1243 case CCISS_GETLUNINFO:{
1244 LogvolInfo_struct luninfo;
1245
39ccf9a6
SC		 1246 memcpy(&luninfo.LunID, drv->LunID,
1247 sizeof(luninfo.LunID));
7c832835
BH		 1248 luninfo.num_opens = drv->usage_count;
1249 luninfo.num_parts = 0;
1250 if (copy_to_user(argp, &luninfo,
1251 sizeof(LogvolInfo_struct)))
1252 return -EFAULT;
1253 return 0;
1254 }
1da177e4 1255 case CCISS_PASSTHRU:
1da177e4 1256 {
7c832835
BH		 1257 IOCTL_Command_struct iocommand;
1258 CommandList_struct *c;
1259 char *buff = NULL;
1260 u64bit temp64;
1261 unsigned long flags;
6e9a4738 1262 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1263
7c832835
BH		 1264 if (!arg)
1265 return -EINVAL;
1da177e4 1266
7c832835
BH		 1267 if (!capable(CAP_SYS_RAWIO))
1268 return -EPERM;
1da177e4 1269
7c832835
BH		 1270 if (copy_from_user
1271 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1272 return -EFAULT;
1273 if ((iocommand.buf_size < 1) &&
1274 (iocommand.Request.Type.Direction != XFER_NONE)) {
1275 return -EINVAL;
1276 }
1277#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1278 /* Check kmalloc limits */
1279 if (iocommand.buf_size > 128000)
1280 return -EINVAL;
1281#endif
1282 if (iocommand.buf_size > 0) {
1283 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1284 if (buff == NULL)
1285 return -EFAULT;
1286 }
1287 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1288 /* Copy the data into the buffer we created */
1289 if (copy_from_user
1290 (buff, iocommand.buf, iocommand.buf_size)) {
1291 kfree(buff);
1292 return -EFAULT;
1293 }
1294 } else {
1295 memset(buff, 0, iocommand.buf_size);
1296 }
1297 if ((c = cmd_alloc(host, 0)) == NULL) {
1298 kfree(buff);
1299 return -ENOMEM;
1300 }
1301 // Fill in the command type
1302 c->cmd_type = CMD_IOCTL_PEND;
1303 // Fill in Command Header
1304 c->Header.ReplyQueue = 0; // unused in simple mode
1305 if (iocommand.buf_size > 0) // buffer to fill
1306 {
1307 c->Header.SGList = 1;
1308 c->Header.SGTotal = 1;
1309 } else // no buffers to fill
1310 {
1311 c->Header.SGList = 0;
1312 c->Header.SGTotal = 0;
1313 }
1314 c->Header.LUN = iocommand.LUN_info;
1315 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1316
7c832835
BH		 1317 // Fill in Request block
1318 c->Request = iocommand.Request;
1da177e4 1319
7c832835
BH		 1320 // Fill in the scatter gather information
1321 if (iocommand.buf_size > 0) {
1322 temp64.val = pci_map_single(host->pdev, buff,
1323 iocommand.buf_size,
1324 PCI_DMA_BIDIRECTIONAL);
1325 c->SG[0].Addr.lower = temp64.val32.lower;
1326 c->SG[0].Addr.upper = temp64.val32.upper;
1327 c->SG[0].Len = iocommand.buf_size;
1328 c->SG[0].Ext = 0; // we are not chaining
1329 }
1330 c->waiting = &wait;
1331
1332 /* Put the request on the tail of the request queue */
1333 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1334 addQ(&host->reqQ, c);
1335 host->Qdepth++;
1336 start_io(host);
1337 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1338
1339 wait_for_completion(&wait);
1340
1341 /* unlock the buffers from DMA */
1342 temp64.val32.lower = c->SG[0].Addr.lower;
1343 temp64.val32.upper = c->SG[0].Addr.upper;
1344 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1345 iocommand.buf_size,
1346 PCI_DMA_BIDIRECTIONAL);
1347
0a9279cc
MM		 1348 check_ioctl_unit_attention(host, c);
1349
7c832835
BH		 1350 /* Copy the error information out */
1351 iocommand.error_info = *(c->err_info);
1352 if (copy_to_user
1353 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1354 kfree(buff);
1da177e4
LT		 1355 cmd_free(host, c, 0);
1356 return -EFAULT;
1357 }
7c832835
BH		 1358
1359 if (iocommand.Request.Type.Direction == XFER_READ) {
1360 /* Copy the data out of the buffer we created */
1361 if (copy_to_user
1362 (iocommand.buf, buff, iocommand.buf_size)) {
1363 kfree(buff);
1364 cmd_free(host, c, 0);
1365 return -EFAULT;
1366 }
1367 }
1368 kfree(buff);
1369 cmd_free(host, c, 0);
1370 return 0;
1da177e4 1371 }
7c832835
BH		 1372 case CCISS_BIG_PASSTHRU:{
1373 BIG_IOCTL_Command_struct *ioc;
1374 CommandList_struct *c;
1375 unsigned char **buff = NULL;
1376 int *buff_size = NULL;
1377 u64bit temp64;
1378 unsigned long flags;
1379 BYTE sg_used = 0;
1380 int status = 0;
1381 int i;
6e9a4738 1382 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1383 __u32 left;
1384 __u32 sz;
1385 BYTE __user *data_ptr;
1386
1387 if (!arg)
1388 return -EINVAL;
1389 if (!capable(CAP_SYS_RAWIO))
1390 return -EPERM;
1391 ioc = (BIG_IOCTL_Command_struct *)
1392 kmalloc(sizeof(*ioc), GFP_KERNEL);
1393 if (!ioc) {
1394 status = -ENOMEM;
1395 goto cleanup1;
1396 }
1397 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1398 status = -EFAULT;
1399 goto cleanup1;
1400 }
1401 if ((ioc->buf_size < 1) &&
1402 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1403 status = -EINVAL;
1404 goto cleanup1;
7c832835
BH		 1405 }
1406 /* Check kmalloc limits using all SGs */
1407 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1408 status = -EINVAL;
1409 goto cleanup1;
1410 }
1411 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1412 status = -EINVAL;
1413 goto cleanup1;
1414 }
1415 buff =
1416 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1417 if (!buff) {
1da177e4
LT		 1418 status = -ENOMEM;
1419 goto cleanup1;
1420 }
5cbded58 1421 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1422 GFP_KERNEL);
1423 if (!buff_size) {
1424 status = -ENOMEM;
1425 goto cleanup1;
1426 }
1427 left = ioc->buf_size;
1428 data_ptr = ioc->buf;
1429 while (left) {
1430 sz = (left >
1431 ioc->malloc_size) ? ioc->
1432 malloc_size : left;
1433 buff_size[sg_used] = sz;
1434 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1435 if (buff[sg_used] == NULL) {
1da177e4 1436 status = -ENOMEM;
15534d38
JA		 1437 goto cleanup1;
1438 }
7c832835
BH		 1439 if (ioc->Request.Type.Direction == XFER_WRITE) {
1440 if (copy_from_user
1441 (buff[sg_used], data_ptr, sz)) {
f7108f91 1442 status = -EFAULT;
7c832835
BH		 1443 goto cleanup1;
1444 }
1445 } else {
1446 memset(buff[sg_used], 0, sz);
1447 }
1448 left -= sz;
1449 data_ptr += sz;
1450 sg_used++;
1451 }
1452 if ((c = cmd_alloc(host, 0)) == NULL) {
1453 status = -ENOMEM;
1454 goto cleanup1;
1455 }
1456 c->cmd_type = CMD_IOCTL_PEND;
1457 c->Header.ReplyQueue = 0;
1458
1459 if (ioc->buf_size > 0) {
1460 c->Header.SGList = sg_used;
1461 c->Header.SGTotal = sg_used;
1da177e4 1462 } else {
7c832835
BH		 1463 c->Header.SGList = 0;
1464 c->Header.SGTotal = 0;
1da177e4 1465 }
7c832835
BH		 1466 c->Header.LUN = ioc->LUN_info;
1467 c->Header.Tag.lower = c->busaddr;
1468
1469 c->Request = ioc->Request;
1470 if (ioc->buf_size > 0) {
1471 int i;
1472 for (i = 0; i < sg_used; i++) {
1473 temp64.val =
1474 pci_map_single(host->pdev, buff[i],
1475 buff_size[i],
1476 PCI_DMA_BIDIRECTIONAL);
1477 c->SG[i].Addr.lower =
1478 temp64.val32.lower;
1479 c->SG[i].Addr.upper =
1480 temp64.val32.upper;
1481 c->SG[i].Len = buff_size[i];
1482 c->SG[i].Ext = 0; /* we are not chaining */
1483 }
1484 }
1485 c->waiting = &wait;
1486 /* Put the request on the tail of the request queue */
1487 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1488 addQ(&host->reqQ, c);
1489 host->Qdepth++;
1490 start_io(host);
1491 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1492 wait_for_completion(&wait);
1493 /* unlock the buffers from DMA */
1494 for (i = 0; i < sg_used; i++) {
1495 temp64.val32.lower = c->SG[i].Addr.lower;
1496 temp64.val32.upper = c->SG[i].Addr.upper;
1497 pci_unmap_single(host->pdev,
1498 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1499 PCI_DMA_BIDIRECTIONAL);
1da177e4 1500 }
0a9279cc 1501 check_ioctl_unit_attention(host, c);
7c832835
BH		 1502 /* Copy the error information out */
1503 ioc->error_info = *(c->err_info);
1504 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1505 cmd_free(host, c, 0);
1506 status = -EFAULT;
1507 goto cleanup1;
1508 }
1509 if (ioc->Request.Type.Direction == XFER_READ) {
1510 /* Copy the data out of the buffer we created */
1511 BYTE __user *ptr = ioc->buf;
1512 for (i = 0; i < sg_used; i++) {
1513 if (copy_to_user
1514 (ptr, buff[i], buff_size[i])) {
1515 cmd_free(host, c, 0);
1516 status = -EFAULT;
1517 goto cleanup1;
1518 }
1519 ptr += buff_size[i];
1da177e4 1520 }
1da177e4 1521 }
7c832835
BH		 1522 cmd_free(host, c, 0);
1523 status = 0;
1524 cleanup1:
1525 if (buff) {
1526 for (i = 0; i < sg_used; i++)
1527 kfree(buff[i]);
1528 kfree(buff);
1529 }
1530 kfree(buff_size);
1531 kfree(ioc);
1532 return status;
1da177e4 1533 }
03bbfee5
MMOD		 1534
1535 /* scsi_cmd_ioctl handles these, below, though some are not */
1536 /* very meaningful for cciss. SG_IO is the main one people want. */
1537
1538 case SG_GET_VERSION_NUM:
1539 case SG_SET_TIMEOUT:
1540 case SG_GET_TIMEOUT:
1541 case SG_GET_RESERVED_SIZE:
1542 case SG_SET_RESERVED_SIZE:
1543 case SG_EMULATED_HOST:
1544 case SG_IO:
1545 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1546 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1547
1548 /* scsi_cmd_ioctl would normally handle these, below, but */
1549 /* they aren't a good fit for cciss, as CD-ROMs are */
1550 /* not supported, and we don't have any bus/target/lun */
1551 /* which we present to the kernel. */
1552
1553 case CDROM_SEND_PACKET:
1554 case CDROMCLOSETRAY:
1555 case CDROMEJECT:
1556 case SCSI_IOCTL_GET_IDLUN:
1557 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1558 default:
1559 return -ENOTTY;
1560 }
1da177e4
LT		 1561}
1562
7b30f092
JA		 1563static void cciss_check_queues(ctlr_info_t *h)
1564{
1565 int start_queue = h->next_to_run;
1566 int i;
1567
1568 /* check to see if we have maxed out the number of commands that can
1569 * be placed on the queue. If so then exit. We do this check here
1570 * in case the interrupt we serviced was from an ioctl and did not
1571 * free any new commands.
1572 */
f880632f 1573 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1574 return;
1575
1576 /* We have room on the queue for more commands. Now we need to queue
1577 * them up. We will also keep track of the next queue to run so
1578 * that every queue gets a chance to be started first.
1579 */
1580 for (i = 0; i < h->highest_lun + 1; i++) {
1581 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1582 /* make sure the disk has been added and the drive is real
1583 * because this can be called from the middle of init_one.
1584 */
1585 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1586 continue;
1587 blk_start_queue(h->gendisk[curr_queue]->queue);
1588
1589 /* check to see if we have maxed out the number of commands
1590 * that can be placed on the queue.
1591 */
f880632f 1592 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1593 if (curr_queue == start_queue) {
1594 h->next_to_run =
1595 (start_queue + 1) % (h->highest_lun + 1);
1596 break;
1597 } else {
1598 h->next_to_run = curr_queue;
1599 break;
1600 }
7b30f092
JA		 1601 }
1602 }
1603}
1604
ca1e0484
MM		 1605static void cciss_softirq_done(struct request *rq)
1606{
1607 CommandList_struct *cmd = rq->completion_data;
1608 ctlr_info_t *h = hba[cmd->ctlr];
1609 unsigned long flags;
1610 u64bit temp64;
1611 int i, ddir;
1612
1613 if (cmd->Request.Type.Direction == XFER_READ)
1614 ddir = PCI_DMA_FROMDEVICE;
1615 else
1616 ddir = PCI_DMA_TODEVICE;
1617
1618 /* command did not need to be retried */
1619 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1620 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1621 temp64.val32.lower = cmd->SG[i].Addr.lower;
1622 temp64.val32.upper = cmd->SG[i].Addr.upper;
1623 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1624 }
1625
ca1e0484
MM		 1626#ifdef CCISS_DEBUG
1627 printk("Done with %p\n", rq);
7c832835 1628#endif /* CCISS_DEBUG */
ca1e0484 1629
c3a4d78c 1630 /* set the residual count for pc requests */
ac44e5b2 1631 if (blk_pc_request(rq))
c3a4d78c 1632 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1633
c3a4d78c 1634 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1635
ca1e0484 1636 spin_lock_irqsave(&h->lock, flags);
7c832835 1637 cmd_free(h, cmd, 1);
7b30f092 1638 cciss_check_queues(h);
ca1e0484
MM		 1639 spin_unlock_irqrestore(&h->lock, flags);
1640}
1641
39ccf9a6
SC		 1642static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1643 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1644{
39ccf9a6
SC		 1645 memcpy(scsi3addr, h->drv[log_unit].LunID,
1646 sizeof(h->drv[log_unit].LunID));
b57695fe 1647}
1648
7fe06326
AP		 1649/* This function gets the SCSI vendor, model, and revision of a logical drive
1650 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1651 * they cannot be read.
1652 */
1653static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1654 char *vendor, char *model, char *rev)
1655{
1656 int rc;
1657 InquiryData_struct *inq_buf;
b57695fe 1658 unsigned char scsi3addr[8];
7fe06326
AP		 1659
1660 *vendor = '\0';
1661 *model = '\0';
1662 *rev = '\0';
1663
1664 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1665 if (!inq_buf)
1666 return;
1667
b57695fe 1668 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1669 if (withirq)
1670 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1671 sizeof(InquiryData_struct), 0,
1672 scsi3addr, TYPE_CMD);
7fe06326
AP		 1673 else
1674 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1675 sizeof(InquiryData_struct), 0,
1676 scsi3addr, TYPE_CMD);
7fe06326
AP		 1677 if (rc == IO_OK) {
1678 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1679 vendor[VENDOR_LEN] = '\0';
1680 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1681 model[MODEL_LEN] = '\0';
1682 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1683 rev[REV_LEN] = '\0';
1684 }
1685
1686 kfree(inq_buf);
1687 return;
1688}
1689
a72da29b
MM		 1690/* This function gets the serial number of a logical drive via
1691 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1692 * number cannot be had, for whatever reason, 16 bytes of 0xff
1693 * are returned instead.
1694 */
1695static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1696 unsigned char *serial_no, int buflen)
1697{
1698#define PAGE_83_INQ_BYTES 64
1699 int rc;
1700 unsigned char *buf;
b57695fe 1701 unsigned char scsi3addr[8];
a72da29b
MM		 1702
1703 if (buflen > 16)
1704 buflen = 16;
1705 memset(serial_no, 0xff, buflen);
1706 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1707 if (!buf)
1708 return;
1709 memset(serial_no, 0, buflen);
b57695fe 1710 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1711 if (withirq)
1712 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1713 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1714 else
1715 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1716 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1717 if (rc == IO_OK)
1718 memcpy(serial_no, &buf[8], buflen);
1719 kfree(buf);
1720 return;
1721}
1722
617e1344
SC		 1723/*
1724 * cciss_add_disk sets up the block device queue for a logical drive
1725 */
1726static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1727 int drv_index)
1728{
1729 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1730 if (!disk->queue)
1731 goto init_queue_failure;
6ae5ce8e
MM		 1732 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1733 disk->major = h->major;
1734 disk->first_minor = drv_index << NWD_SHIFT;
1735 disk->fops = &cciss_fops;
617e1344
SC		 1736 if (h->drv[drv_index].dev == NULL) {
1737 if (cciss_create_ld_sysfs_entry(h, drv_index))
1738 goto cleanup_queue;
1739 }
6ae5ce8e 1740 disk->private_data = &h->drv[drv_index];
617e1344 1741 disk->driverfs_dev = h->drv[drv_index].dev;
6ae5ce8e
MM		 1742
1743 /* Set up queue information */
1744 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1745
1746 /* This is a hardware imposed limit. */
1747 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1748
1749 /* This is a limit in the driver and could be eliminated. */
1750 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1751
1752 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1753
1754 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1755
1756 disk->queue->queuedata = h;
1757
e1defc4f
MP		 1758 blk_queue_logical_block_size(disk->queue,
1759 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1760
1761 /* Make sure all queue data is written out before */
1762 /* setting h->drv[drv_index].queue, as setting this */
1763 /* allows the interrupt handler to start the queue */
1764 wmb();
1765 h->drv[drv_index].queue = disk->queue;
1766 add_disk(disk);
617e1344
SC		 1767 return 0;
1768
1769cleanup_queue:
1770 blk_cleanup_queue(disk->queue);
1771 disk->queue = NULL;
e8074f79 1772init_queue_failure:
617e1344 1773 return -1;
6ae5ce8e
MM		 1774}
1775
ddd47442 1776/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1777 * If the usage_count is zero and it is a heretofore unknown drive, or,
1778 * the drive's capacity, geometry, or serial number has changed,
1779 * then the drive information will be updated and the disk will be
1780 * re-registered with the kernel. If these conditions don't hold,
1781 * then it will be left alone for the next reboot. The exception to this
1782 * is disk 0 which will always be left registered with the kernel since it
1783 * is also the controller node. Any changes to disk 0 will show up on
1784 * the next reboot.
7c832835 1785 */
2d11d993
SC		 1786static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1787 int via_ioctl)
7c832835 1788{
ddd47442
MM		 1789 ctlr_info_t *h = hba[ctlr];
1790 struct gendisk *disk;
ddd47442
MM		 1791 InquiryData_struct *inq_buff = NULL;
1792 unsigned int block_size;
00988a35 1793 sector_t total_size;
ddd47442
MM		 1794 unsigned long flags = 0;
1795 int ret = 0;
a72da29b
MM		 1796 drive_info_struct *drvinfo;
1797
1798 /* Get information about the disk and modify the driver structure */
1799 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1800 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1801 if (inq_buff == NULL || drvinfo == NULL)
1802 goto mem_msg;
1803
1804 /* testing to see if 16-byte CDBs are already being used */
1805 if (h->cciss_read == CCISS_READ_16) {
1806 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1807 &total_size, &block_size);
1808
1809 } else {
1810 cciss_read_capacity(ctlr, drv_index, 1,
1811 &total_size, &block_size);
1812
1813 /* if read_capacity returns all F's this volume is >2TB */
1814 /* in size so we switch to 16-byte CDB's for all */
1815 /* read/write ops */
1816 if (total_size == 0xFFFFFFFFULL) {
1817 cciss_read_capacity_16(ctlr, drv_index, 1,
1818 &total_size, &block_size);
1819 h->cciss_read = CCISS_READ_16;
1820 h->cciss_write = CCISS_WRITE_16;
1821 } else {
1822 h->cciss_read = CCISS_READ_10;
1823 h->cciss_write = CCISS_WRITE_10;
1824 }
1825 }
1826
1827 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1828 inq_buff, drvinfo);
1829 drvinfo->block_size = block_size;
1830 drvinfo->nr_blocks = total_size + 1;
1831
7fe06326
AP		 1832 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1833 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1834 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1835 sizeof(drvinfo->serial_no));
1836
1837 /* Is it the same disk we already know, and nothing's changed? */
1838 if (h->drv[drv_index].raid_level != -1 &&
1839 ((memcmp(drvinfo->serial_no,
1840 h->drv[drv_index].serial_no, 16) == 0) &&
1841 drvinfo->block_size == h->drv[drv_index].block_size &&
1842 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1843 drvinfo->heads == h->drv[drv_index].heads &&
1844 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1845 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1846 /* The disk is unchanged, nothing to update */
1847 goto freeret;
a72da29b 1848
6ae5ce8e
MM		 1849 /* If we get here it's not the same disk, or something's changed,
1850 * so we need to * deregister it, and re-register it, if it's not
1851 * in use.
1852 * If the disk already exists then deregister it before proceeding
1853 * (unless it's the first disk (for the controller node).
1854 */
a72da29b
MM		 1855 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1856 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1857 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1858 h->drv[drv_index].busy_configuring = 1;
1859 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1860
6ae5ce8e
MM		 1861 /* deregister_disk sets h->drv[drv_index].queue = NULL
1862 * which keeps the interrupt handler from starting
1863 * the queue.
1864 */
2d11d993 1865 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1866 h->drv[drv_index].busy_configuring = 0;
1867 }
1868
1869 /* If the disk is in use return */
1870 if (ret)
a72da29b
MM		 1871 goto freeret;
1872
6ae5ce8e
MM		 1873 /* Save the new information from cciss_geometry_inquiry
1874 * and serial number inquiry.
1875 */
a72da29b
MM		 1876 h->drv[drv_index].block_size = drvinfo->block_size;
1877 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1878 h->drv[drv_index].heads = drvinfo->heads;
1879 h->drv[drv_index].sectors = drvinfo->sectors;
1880 h->drv[drv_index].cylinders = drvinfo->cylinders;
1881 h->drv[drv_index].raid_level = drvinfo->raid_level;
1882 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1883 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1884 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1885 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1886
1887 ++h->num_luns;
1888 disk = h->gendisk[drv_index];
1889 set_capacity(disk, h->drv[drv_index].nr_blocks);
1890
6ae5ce8e
MM		 1891 /* If it's not disk 0 (drv_index != 0)
1892 * or if it was disk 0, but there was previously
1893 * no actual corresponding configured logical drive
1894 * (raid_leve == -1) then we want to update the
1895 * logical drive's information.
1896 */
361e9b07
SC		 1897 if (drv_index || first_time) {
1898 if (cciss_add_disk(h, disk, drv_index) != 0) {
1899 cciss_free_gendisk(h, drv_index);
1900 printk(KERN_WARNING "cciss:%d could not update "
1901 "disk %d\n", h->ctlr, drv_index);
1902 --h->num_luns;
1903 }
1904 }
ddd47442 1905
6ae5ce8e 1906freeret:
ddd47442 1907 kfree(inq_buff);
a72da29b 1908 kfree(drvinfo);
ddd47442 1909 return;
6ae5ce8e 1910mem_msg:
ddd47442
MM		 1911 printk(KERN_ERR "cciss: out of memory\n");
1912 goto freeret;
1913}
1914
1915/* This function will find the first index of the controllers drive array
1916 * that has a -1 for the raid_level and will return that index. This is
1917 * where new drives will be added. If the index to be returned is greater
1918 * than the highest_lun index for the controller then highest_lun is set
1919 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1920 * "controller_node" is used to know if this is a real logical drive, or just
1921 * the controller node, which determines if this counts towards highest_lun.
7c832835 1922 */
eece695f 1923static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1924{
1925 int i;
1926
7c832835
BH		 1927 for (i = 0; i < CISS_MAX_LUN; i++) {
1928 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1929 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1930 if (!controller_node)
1931 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1932 return i;
1933 }
1934 }
1935 return -1;
1936}
1937
361e9b07
SC		 1938static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
1939{
1940 put_disk(h->gendisk[drv_index]);
1941 h->gendisk[drv_index] = NULL;
1942}
1943
6ae5ce8e
MM		 1944/* cciss_add_gendisk finds a free hba[]->drv structure
1945 * and allocates a gendisk if needed, and sets the lunid
1946 * in the drvinfo structure. It returns the index into
1947 * the ->drv[] array, or -1 if none are free.
1948 * is_controller_node indicates whether highest_lun should
1949 * count this disk, or if it's only being added to provide
1950 * a means to talk to the controller in case no logical
1951 * drives have yet been configured.
1952 */
39ccf9a6
SC		 1953static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
1954 int controller_node)
6ae5ce8e
MM		 1955{
1956 int drv_index;
1957
eece695f 1958 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1959 if (drv_index == -1)
1960 return -1;
8ce51966 1961
6ae5ce8e
MM		 1962 /*Check if the gendisk needs to be allocated */
1963 if (!h->gendisk[drv_index]) {
1964 h->gendisk[drv_index] =
1965 alloc_disk(1 << NWD_SHIFT);
1966 if (!h->gendisk[drv_index]) {
1967 printk(KERN_ERR "cciss%d: could not "
1968 "allocate a new disk %d\n",
1969 h->ctlr, drv_index);
1970 return -1;
1971 }
1972 }
39ccf9a6
SC		 1973 memcpy(h->drv[drv_index].LunID, lunid,
1974 sizeof(h->drv[drv_index].LunID));
097d0264
SC		 1975 if (h->drv[drv_index].dev == NULL) {
1976 if (cciss_create_ld_sysfs_entry(h, drv_index))
1977 goto err_free_disk;
1978 }
6ae5ce8e
MM		 1979 /* Don't need to mark this busy because nobody */
1980 /* else knows about this disk yet to contend */
1981 /* for access to it. */
1982 h->drv[drv_index].busy_configuring = 0;
1983 wmb();
1984 return drv_index;
7fe06326
AP		 1985
1986err_free_disk:
361e9b07 1987 cciss_free_gendisk(h, drv_index);
7fe06326 1988 return -1;
6ae5ce8e
MM		 1989}
1990
1991/* This is for the special case of a controller which
1992 * has no logical drives. In this case, we still need
1993 * to register a disk so the controller can be accessed
1994 * by the Array Config Utility.
1995 */
1996static void cciss_add_controller_node(ctlr_info_t *h)
1997{
1998 struct gendisk *disk;
1999 int drv_index;
2000
2001 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2002 return;
2003
39ccf9a6 2004 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2005 if (drv_index == -1)
2006 goto error;
6ae5ce8e
MM		 2007 h->drv[drv_index].block_size = 512;
2008 h->drv[drv_index].nr_blocks = 0;
2009 h->drv[drv_index].heads = 0;
2010 h->drv[drv_index].sectors = 0;
2011 h->drv[drv_index].cylinders = 0;
2012 h->drv[drv_index].raid_level = -1;
2013 memset(h->drv[drv_index].serial_no, 0, 16);
2014 disk = h->gendisk[drv_index];
361e9b07
SC		 2015 if (cciss_add_disk(h, disk, drv_index) == 0)
2016 return;
2017 cciss_free_gendisk(h, drv_index);
2018error:
2019 printk(KERN_WARNING "cciss%d: could not "
2020 "add disk 0.\n", h->ctlr);
2021 return;
6ae5ce8e
MM		 2022}
2023
ddd47442 2024/* This function will add and remove logical drives from the Logical
d14c4ab5 2025 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2026 * so that mount points are preserved until the next reboot. This allows
2027 * for the removal of logical drives in the middle of the drive array
2028 * without a re-ordering of those drives.
2029 * INPUT
2030 * h = The controller to perform the operations on
7c832835 2031 */
2d11d993
SC		 2032static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2033 int via_ioctl)
1da177e4 2034{
ddd47442
MM		 2035 int ctlr = h->ctlr;
2036 int num_luns;
2037 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2038 int return_code;
2039 int listlength = 0;
2040 int i;
2041 int drv_found;
2042 int drv_index = 0;
39ccf9a6 2043 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2044 unsigned long flags;
ddd47442 2045
6ae5ce8e
MM		 2046 if (!capable(CAP_SYS_RAWIO))
2047 return -EPERM;
2048
ddd47442
MM		 2049 /* Set busy_configuring flag for this operation */
2050 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2051 if (h->busy_configuring) {
ddd47442
MM		 2052 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2053 return -EBUSY;
2054 }
2055 h->busy_configuring = 1;
a72da29b 2056 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2057
a72da29b
MM		 2058 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2059 if (ld_buff == NULL)
2060 goto mem_msg;
2061
2062 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2063 sizeof(ReportLunData_struct),
2064 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2065
a72da29b
MM		 2066 if (return_code == IO_OK)
2067 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2068 else { /* reading number of logical volumes failed */
2069 printk(KERN_WARNING "cciss: report logical volume"
2070 " command failed\n");
2071 listlength = 0;
2072 goto freeret;
2073 }
2074
2075 num_luns = listlength / 8; /* 8 bytes per entry */
2076 if (num_luns > CISS_MAX_LUN) {
2077 num_luns = CISS_MAX_LUN;
2078 printk(KERN_WARNING "cciss: more luns configured"
2079 " on controller than can be handled by"
2080 " this driver.\n");
2081 }
2082
6ae5ce8e
MM		 2083 if (num_luns == 0)
2084 cciss_add_controller_node(h);
2085
2086 /* Compare controller drive array to driver's drive array
2087 * to see if any drives are missing on the controller due
2088 * to action of Array Config Utility (user deletes drive)
2089 * and deregister logical drives which have disappeared.
2090 */
a72da29b
MM		 2091 for (i = 0; i <= h->highest_lun; i++) {
2092 int j;
2093 drv_found = 0;
d8a0be6a
SC		 2094
2095 /* skip holes in the array from already deleted drives */
2096 if (h->drv[i].raid_level == -1)
2097 continue;
2098
a72da29b 2099 for (j = 0; j < num_luns; j++) {
39ccf9a6
SC		 2100 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2101 if (memcmp(h->drv[i].LunID, lunid,
2102 sizeof(lunid)) == 0) {
a72da29b
MM		 2103 drv_found = 1;
2104 break;
2105 }
2106 }
2107 if (!drv_found) {
2108 /* Deregister it from the OS, it's gone. */
2109 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2110 h->drv[i].busy_configuring = 1;
2111 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2112 return_code = deregister_disk(h, i, 1, via_ioctl);
a72da29b 2113 h->drv[i].busy_configuring = 0;
ddd47442 2114 }
a72da29b 2115 }
ddd47442 2116
a72da29b
MM		 2117 /* Compare controller drive array to driver's drive array.
2118 * Check for updates in the drive information and any new drives
2119 * on the controller due to ACU adding logical drives, or changing
2120 * a logical drive's size, etc. Reregister any new/changed drives
2121 */
2122 for (i = 0; i < num_luns; i++) {
2123 int j;
ddd47442 2124
a72da29b 2125 drv_found = 0;
ddd47442 2126
39ccf9a6 2127 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2128 /* Find if the LUN is already in the drive array
2129 * of the driver. If so then update its info
2130 * if not in use. If it does not exist then find
2131 * the first free index and add it.
2132 */
2133 for (j = 0; j <= h->highest_lun; j++) {
2134 if (h->drv[j].raid_level != -1 &&
39ccf9a6
SC		 2135 memcmp(h->drv[j].LunID, lunid,
2136 sizeof(h->drv[j].LunID)) == 0) {
a72da29b
MM		 2137 drv_index = j;
2138 drv_found = 1;
2139 break;
ddd47442 2140 }
a72da29b 2141 }
ddd47442 2142
a72da29b
MM		 2143 /* check if the drive was found already in the array */
2144 if (!drv_found) {
eece695f 2145 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2146 if (drv_index == -1)
2147 goto freeret;
a72da29b 2148 }
2d11d993
SC		 2149 cciss_update_drive_info(ctlr, drv_index, first_time,
2150 via_ioctl);
a72da29b 2151 } /* end for */
ddd47442 2152
6ae5ce8e 2153freeret:
ddd47442
MM		 2154 kfree(ld_buff);
2155 h->busy_configuring = 0;
2156 /* We return -1 here to tell the ACU that we have registered/updated
2157 * all of the drives that we can and to keep it from calling us
2158 * additional times.
7c832835 2159 */
ddd47442 2160 return -1;
6ae5ce8e 2161mem_msg:
ddd47442 2162 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2163 h->busy_configuring = 0;
ddd47442
MM		 2164 goto freeret;
2165}
2166
9ddb27b4
SC		 2167static void cciss_clear_drive_info(drive_info_struct *drive_info)
2168{
2169 /* zero out the disk size info */
2170 drive_info->nr_blocks = 0;
2171 drive_info->block_size = 0;
2172 drive_info->heads = 0;
2173 drive_info->sectors = 0;
2174 drive_info->cylinders = 0;
2175 drive_info->raid_level = -1;
2176 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2177 memset(drive_info->model, 0, sizeof(drive_info->model));
2178 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2179 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2180 /*
2181 * don't clear the LUNID though, we need to remember which
2182 * one this one is.
2183 */
2184}
2185
ddd47442
MM		 2186/* This function will deregister the disk and it's queue from the
2187 * kernel. It must be called with the controller lock held and the
2188 * drv structures busy_configuring flag set. It's parameters are:
2189 *
2190 * disk = This is the disk to be deregistered
2191 * drv = This is the drive_info_struct associated with the disk to be
2192 * deregistered. It contains information about the disk used
2193 * by the driver.
2194 * clear_all = This flag determines whether or not the disk information
2195 * is going to be completely cleared out and the highest_lun
2196 * reset. Sometimes we want to clear out information about
d14c4ab5 2197 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2198 * the highest_lun should be left unchanged and the LunID
2199 * should not be cleared.
2d11d993
SC		 2200 * via_ioctl
2201 * This indicates whether we've reached this path via ioctl.
2202 * This affects the maximum usage count allowed for c0d0 to be messed with.
2203 * If this path is reached via ioctl(), then the max_usage_count will
2204 * be 1, as the process calling ioctl() has got to have the device open.
2205 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2206*/
a0ea8622 2207static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2208 int clear_all, int via_ioctl)
ddd47442 2209{
799202cb 2210 int i;
a0ea8622
SC		 2211 struct gendisk *disk;
2212 drive_info_struct *drv;
1da177e4
LT		 2213
2214 if (!capable(CAP_SYS_RAWIO))
2215 return -EPERM;
2216
a0ea8622
SC		 2217 drv = &h->drv[drv_index];
2218 disk = h->gendisk[drv_index];
2219
1da177e4 2220 /* make sure logical volume is NOT is use */
7c832835 2221 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2222 if (drv->usage_count > via_ioctl)
7c832835
BH		 2223 return -EBUSY;
2224 } else if (drv->usage_count > 0)
2225 return -EBUSY;
1da177e4 2226
ddd47442
MM		 2227 /* invalidate the devices and deregister the disk. If it is disk
2228 * zero do not deregister it but just zero out it's values. This
2229 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2230 */
2231 if (h->gendisk[0] != disk) {
5a9df732 2232 struct request_queue *q = disk->queue;
097d0264 2233 if (disk->flags & GENHD_FL_UP) {
8ce51966 2234 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2235 del_gendisk(disk);
097d0264 2236 }
5a9df732
AB		 2237 if (q) {
2238 blk_cleanup_queue(q);
2239 /* Set drv->queue to NULL so that we do not try
2240 * to call blk_start_queue on this queue in the
2241 * interrupt handler
2242 */
2243 drv->queue = NULL;
2244 }
2245 /* If clear_all is set then we are deleting the logical
2246 * drive, not just refreshing its info. For drives
2247 * other than disk 0 we will call put_disk. We do not
2248 * do this for disk 0 as we need it to be able to
2249 * configure the controller.
a72da29b 2250 */
5a9df732
AB		 2251 if (clear_all){
2252 /* This isn't pretty, but we need to find the
2253 * disk in our array and NULL our the pointer.
2254 * This is so that we will call alloc_disk if
2255 * this index is used again later.
a72da29b 2256 */
5a9df732 2257 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2258 if (h->gendisk[i] == disk) {
5a9df732
AB		 2259 h->gendisk[i] = NULL;
2260 break;
799202cb 2261 }
799202cb 2262 }
5a9df732 2263 put_disk(disk);
ddd47442 2264 }
799202cb
MM		 2265 } else {
2266 set_capacity(disk, 0);
ddd47442
MM		 2267 }
2268
2269 --h->num_luns;
9ddb27b4
SC		 2270 cciss_clear_drive_info(drv);
2271
7c832835
BH		 2272 if (clear_all) {
2273 /* check to see if it was the last disk */
2274 if (drv == h->drv + h->highest_lun) {
2275 /* if so, find the new hightest lun */
2276 int i, newhighest = -1;
a72da29b 2277 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2278 /* if the disk has size > 0, it is available */
ddd47442 2279 if (h->drv[i].heads)
7c832835
BH		 2280 newhighest = i;
2281 }
2282 h->highest_lun = newhighest;
1da177e4 2283 }
39ccf9a6 2284 memset(drv->LunID, 0, sizeof(drv->LunID));
ddd47442 2285 }
e2019b58 2286 return 0;
1da177e4 2287}
ddd47442 2288
b57695fe 2289static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2290 size_t size, __u8 page_code, unsigned char *scsi3addr,
2291 int cmd_type)
1da177e4 2292{
7c832835 2293 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2294 u64bit buff_dma_handle;
2295 int status = IO_OK;
2296
2297 c->cmd_type = CMD_IOCTL_PEND;
2298 c->Header.ReplyQueue = 0;
7c832835 2299 if (buff != NULL) {
1da177e4 2300 c->Header.SGList = 1;
7c832835 2301 c->Header.SGTotal = 1;
1da177e4
LT		 2302 } else {
2303 c->Header.SGList = 0;
7c832835 2304 c->Header.SGTotal = 0;
1da177e4
LT		 2305 }
2306 c->Header.Tag.lower = c->busaddr;
b57695fe 2307 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2308
2309 c->Request.Type.Type = cmd_type;
2310 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2311 switch (cmd) {
2312 case CISS_INQUIRY:
1da177e4 2313 /* are we trying to read a vital product page */
7c832835 2314 if (page_code != 0) {
1da177e4
LT		 2315 c->Request.CDB[1] = 0x01;
2316 c->Request.CDB[2] = page_code;
2317 }
2318 c->Request.CDBLen = 6;
7c832835 2319 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2320 c->Request.Type.Direction = XFER_READ;
2321 c->Request.Timeout = 0;
7c832835
BH		 2322 c->Request.CDB[0] = CISS_INQUIRY;
2323 c->Request.CDB[4] = size & 0xFF;
2324 break;
1da177e4
LT		 2325 case CISS_REPORT_LOG:
2326 case CISS_REPORT_PHYS:
7c832835 2327 /* Talking to controller so It's a physical command
1da177e4 2328 mode = 00 target = 0. Nothing to write.
7c832835 2329 */
1da177e4
LT		 2330 c->Request.CDBLen = 12;
2331 c->Request.Type.Attribute = ATTR_SIMPLE;
2332 c->Request.Type.Direction = XFER_READ;
2333 c->Request.Timeout = 0;
2334 c->Request.CDB[0] = cmd;
7c832835 2335 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2336 c->Request.CDB[7] = (size >> 16) & 0xFF;
2337 c->Request.CDB[8] = (size >> 8) & 0xFF;
2338 c->Request.CDB[9] = size & 0xFF;
2339 break;
2340
2341 case CCISS_READ_CAPACITY:
1da177e4
LT		 2342 c->Request.CDBLen = 10;
2343 c->Request.Type.Attribute = ATTR_SIMPLE;
2344 c->Request.Type.Direction = XFER_READ;
2345 c->Request.Timeout = 0;
2346 c->Request.CDB[0] = cmd;
7c832835 2347 break;
00988a35 2348 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2349 c->Request.CDBLen = 16;
2350 c->Request.Type.Attribute = ATTR_SIMPLE;
2351 c->Request.Type.Direction = XFER_READ;
2352 c->Request.Timeout = 0;
2353 c->Request.CDB[0] = cmd;
2354 c->Request.CDB[1] = 0x10;
2355 c->Request.CDB[10] = (size >> 24) & 0xFF;
2356 c->Request.CDB[11] = (size >> 16) & 0xFF;
2357 c->Request.CDB[12] = (size >> 8) & 0xFF;
2358 c->Request.CDB[13] = size & 0xFF;
2359 c->Request.Timeout = 0;
2360 c->Request.CDB[0] = cmd;
2361 break;
1da177e4
LT		 2362 case CCISS_CACHE_FLUSH:
2363 c->Request.CDBLen = 12;
2364 c->Request.Type.Attribute = ATTR_SIMPLE;
2365 c->Request.Type.Direction = XFER_WRITE;
2366 c->Request.Timeout = 0;
2367 c->Request.CDB[0] = BMIC_WRITE;
2368 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2369 break;
88f627ae 2370 case TEST_UNIT_READY:
88f627ae
SC		 2371 c->Request.CDBLen = 6;
2372 c->Request.Type.Attribute = ATTR_SIMPLE;
2373 c->Request.Type.Direction = XFER_NONE;
2374 c->Request.Timeout = 0;
2375 break;
1da177e4
LT		 2376 default:
2377 printk(KERN_WARNING
7c832835 2378 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2379 return IO_ERROR;
1da177e4
LT		 2380 }
2381 } else if (cmd_type == TYPE_MSG) {
2382 switch (cmd) {
7c832835 2383 case 0: /* ABORT message */
3da8b713 2384 c->Request.CDBLen = 12;
2385 c->Request.Type.Attribute = ATTR_SIMPLE;
2386 c->Request.Type.Direction = XFER_WRITE;
2387 c->Request.Timeout = 0;
7c832835
BH		 2388 c->Request.CDB[0] = cmd; /* abort */
2389 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2390 /* buff contains the tag of the command to abort */
2391 memcpy(&c->Request.CDB[4], buff, 8);
2392 break;
7c832835 2393 case 1: /* RESET message */
88f627ae 2394 c->Request.CDBLen = 16;
3da8b713 2395 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2396 c->Request.Type.Direction = XFER_NONE;
3da8b713 2397 c->Request.Timeout = 0;
2398 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2399 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2400 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2401 break;
1da177e4
LT		 2402 case 3: /* No-Op message */
2403 c->Request.CDBLen = 1;
2404 c->Request.Type.Attribute = ATTR_SIMPLE;
2405 c->Request.Type.Direction = XFER_WRITE;
2406 c->Request.Timeout = 0;
2407 c->Request.CDB[0] = cmd;
2408 break;
2409 default:
2410 printk(KERN_WARNING
7c832835 2411 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2412 return IO_ERROR;
2413 }
2414 } else {
2415 printk(KERN_WARNING
7c832835 2416 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2417 return IO_ERROR;
2418 }
2419 /* Fill in the scatter gather information */
2420 if (size > 0) {
2421 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2422 buff, size,
2423 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2424 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2425 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2426 c->SG[0].Len = size;
7c832835 2427 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2428 }
2429 return status;
2430}
7c832835 2431
3c2ab402 2432static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2433{
2434 switch (c->err_info->ScsiStatus) {
2435 case SAM_STAT_GOOD:
2436 return IO_OK;
2437 case SAM_STAT_CHECK_CONDITION:
2438 switch (0xf & c->err_info->SenseInfo[2]) {
2439 case 0: return IO_OK; /* no sense */
2440 case 1: return IO_OK; /* recovered error */
2441 default:
2442 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2443 "check condition, sense key = 0x%02x\n",
2444 h->ctlr, c->Request.CDB[0],
2445 c->err_info->SenseInfo[2]);
2446 }
2447 break;
2448 default:
2449 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2450 "scsi status = 0x%02x\n", h->ctlr,
2451 c->Request.CDB[0], c->err_info->ScsiStatus);
2452 break;
2453 }
2454 return IO_ERROR;
2455}
2456
789a424a 2457static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2458{
5390cfc3 2459 int return_status = IO_OK;
7c832835 2460
789a424a 2461 if (c->err_info->CommandStatus == CMD_SUCCESS)
2462 return IO_OK;
5390cfc3 2463
2464 switch (c->err_info->CommandStatus) {
2465 case CMD_TARGET_STATUS:
3c2ab402 2466 return_status = check_target_status(h, c);
5390cfc3 2467 break;
2468 case CMD_DATA_UNDERRUN:
2469 case CMD_DATA_OVERRUN:
2470 /* expected for inquiry and report lun commands */
2471 break;
2472 case CMD_INVALID:
789a424a 2473 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2474 "reported invalid\n", c->Request.CDB[0]);
2475 return_status = IO_ERROR;
2476 break;
2477 case CMD_PROTOCOL_ERR:
2478 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2479 "protocol error \n", c->Request.CDB[0]);
2480 return_status = IO_ERROR;
2481 break;
2482 case CMD_HARDWARE_ERR:
2483 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2484 " hardware error\n", c->Request.CDB[0]);
2485 return_status = IO_ERROR;
2486 break;
2487 case CMD_CONNECTION_LOST:
2488 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2489 "connection lost\n", c->Request.CDB[0]);
2490 return_status = IO_ERROR;
2491 break;
2492 case CMD_ABORTED:
2493 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2494 "aborted\n", c->Request.CDB[0]);
2495 return_status = IO_ERROR;
2496 break;
2497 case CMD_ABORT_FAILED:
2498 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2499 "abort failed\n", c->Request.CDB[0]);
2500 return_status = IO_ERROR;
2501 break;
2502 case CMD_UNSOLICITED_ABORT:
2503 printk(KERN_WARNING
2504 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2505 c->Request.CDB[0]);
789a424a 2506 return_status = IO_NEEDS_RETRY;
5390cfc3 2507 break;
2508 default:
2509 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2510 "unknown status %x\n", c->Request.CDB[0],
2511 c->err_info->CommandStatus);
2512 return_status = IO_ERROR;
7c832835 2513 }
789a424a 2514 return return_status;
2515}
2516
2517static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2518 int attempt_retry)
2519{
2520 DECLARE_COMPLETION_ONSTACK(wait);
2521 u64bit buff_dma_handle;
2522 unsigned long flags;
2523 int return_status = IO_OK;
2524
2525resend_cmd2:
2526 c->waiting = &wait;
2527 /* Put the request on the tail of the queue and send it */
2528 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2529 addQ(&h->reqQ, c);
2530 h->Qdepth++;
2531 start_io(h);
2532 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2533
2534 wait_for_completion(&wait);
2535
2536 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2537 goto command_done;
2538
2539 return_status = process_sendcmd_error(h, c);
2540
2541 if (return_status == IO_NEEDS_RETRY &&
2542 c->retry_count < MAX_CMD_RETRIES) {
2543 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2544 c->Request.CDB[0]);
2545 c->retry_count++;
2546 /* erase the old error information */
2547 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2548 return_status = IO_OK;
2549 INIT_COMPLETION(wait);
2550 goto resend_cmd2;
2551 }
5390cfc3 2552
2553command_done:
1da177e4 2554 /* unlock the buffers from DMA */
bb2a37bf
MM		 2555 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2556 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2557 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2558 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2559 return return_status;
2560}
2561
b57695fe 2562static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2563 __u8 page_code, unsigned char scsi3addr[],
2564 int cmd_type)
5390cfc3 2565{
2566 ctlr_info_t *h = hba[ctlr];
2567 CommandList_struct *c;
2568 int return_status;
2569
2570 c = cmd_alloc(h, 0);
2571 if (!c)
2572 return -ENOMEM;
b57695fe 2573 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2574 scsi3addr, cmd_type);
5390cfc3 2575 if (return_status == IO_OK)
789a424a 2576 return_status = sendcmd_withirq_core(h, c, 1);
2577
1da177e4 2578 cmd_free(h, c, 0);
7c832835 2579 return return_status;
1da177e4 2580}
7c832835 2581
1da177e4 2582static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2583 int withirq, sector_t total_size,
7c832835
BH		 2584 unsigned int block_size,
2585 InquiryData_struct *inq_buff,
2586 drive_info_struct *drv)
1da177e4
LT		 2587{
2588 int return_code;
00988a35 2589 unsigned long t;
b57695fe 2590 unsigned char scsi3addr[8];
00988a35 2591
1da177e4 2592 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2593 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2594 if (withirq)
2595 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2596 inq_buff, sizeof(*inq_buff),
2597 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2598 else
2599 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2600 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2601 TYPE_CMD);
1da177e4 2602 if (return_code == IO_OK) {
7c832835 2603 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2604 printk(KERN_WARNING
7c832835
BH		 2605 "cciss: reading geometry failed, volume "
2606 "does not support reading geometry\n");
1da177e4 2607 drv->heads = 255;
7c832835 2608 drv->sectors = 32; // Sectors per track
7f42d3b8 2609 drv->cylinders = total_size + 1;
89f97ad1 2610 drv->raid_level = RAID_UNKNOWN;
1da177e4 2611 } else {
1da177e4
LT		 2612 drv->heads = inq_buff->data_byte[6];
2613 drv->sectors = inq_buff->data_byte[7];
2614 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2615 drv->cylinders += inq_buff->data_byte[5];
2616 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2617 }
2618 drv->block_size = block_size;
97c06978 2619 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2620 t = drv->heads * drv->sectors;
2621 if (t > 1) {
97c06978
MMOD		 2622 sector_t real_size = total_size + 1;
2623 unsigned long rem = sector_div(real_size, t);
3f7705ea 2624 if (rem)
97c06978
MMOD		 2625 real_size++;
2626 drv->cylinders = real_size;
1da177e4 2627 }
7c832835 2628 } else { /* Get geometry failed */
1da177e4
LT		 2629 printk(KERN_WARNING "cciss: reading geometry failed\n");
2630 }
1da177e4 2631}
7c832835 2632
1da177e4 2633static void
00988a35 2634cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2635 unsigned int *block_size)
1da177e4 2636{
00988a35 2637 ReadCapdata_struct *buf;
1da177e4 2638 int return_code;
b57695fe 2639 unsigned char scsi3addr[8];
1aebe187
MK		 2640
2641 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2642 if (!buf) {
00988a35
MMOD		 2643 printk(KERN_WARNING "cciss: out of memory\n");
2644 return;
2645 }
1aebe187 2646
b57695fe 2647 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2648 if (withirq)
2649 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2650 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2651 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2652 else
2653 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2654 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2655 0, scsi3addr, TYPE_CMD);
1da177e4 2656 if (return_code == IO_OK) {
4c1f2b31
AV		 2657 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2658 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2659 } else { /* read capacity command failed */
1da177e4
LT		 2660 printk(KERN_WARNING "cciss: read capacity failed\n");
2661 *total_size = 0;
2662 *block_size = BLOCK_SIZE;
2663 }
00988a35 2664 kfree(buf);
00988a35
MMOD		 2665}
2666
2667static void
2668cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2669{
2670 ReadCapdata_struct_16 *buf;
2671 int return_code;
b57695fe 2672 unsigned char scsi3addr[8];
1aebe187
MK		 2673
2674 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2675 if (!buf) {
00988a35
MMOD		 2676 printk(KERN_WARNING "cciss: out of memory\n");
2677 return;
2678 }
1aebe187 2679
b57695fe 2680 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2681 if (withirq) {
2682 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2683 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2684 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2685 }
2686 else {
2687 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2688 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2689 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2690 }
2691 if (return_code == IO_OK) {
4c1f2b31
AV		 2692 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2693 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2694 } else { /* read capacity command failed */
2695 printk(KERN_WARNING "cciss: read capacity failed\n");
2696 *total_size = 0;
2697 *block_size = BLOCK_SIZE;
2698 }
7b92aadf 2699 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2700 (unsigned long long)*total_size+1, *block_size);
00988a35 2701 kfree(buf);
1da177e4
LT		 2702}
2703
1da177e4
LT		 2704static int cciss_revalidate(struct gendisk *disk)
2705{
2706 ctlr_info_t *h = get_host(disk);
2707 drive_info_struct *drv = get_drv(disk);
2708 int logvol;
7c832835 2709 int FOUND = 0;
1da177e4 2710 unsigned int block_size;
00988a35 2711 sector_t total_size;
1da177e4
LT		 2712 InquiryData_struct *inq_buff = NULL;
2713
7c832835 2714 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
39ccf9a6
SC		 2715 if (memcmp(h->drv[logvol].LunID, drv->LunID,
2716 sizeof(drv->LunID)) == 0) {
7c832835 2717 FOUND = 1;
1da177e4
LT		 2718 break;
2719 }
2720 }
2721
7c832835
BH		 2722 if (!FOUND)
2723 return 1;
1da177e4 2724
7c832835
BH		 2725 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2726 if (inq_buff == NULL) {
2727 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2728 return 1;
2729 }
00988a35
MMOD		 2730 if (h->cciss_read == CCISS_READ_10) {
2731 cciss_read_capacity(h->ctlr, logvol, 1,
2732 &total_size, &block_size);
2733 } else {
2734 cciss_read_capacity_16(h->ctlr, logvol, 1,
2735 &total_size, &block_size);
2736 }
7c832835
BH		 2737 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2738 inq_buff, drv);
1da177e4 2739
e1defc4f 2740 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2741 set_capacity(disk, drv->nr_blocks);
2742
1da177e4
LT		 2743 kfree(inq_buff);
2744 return 0;
2745}
2746
2747/*
2748 * Wait polling for a command to complete.
2749 * The memory mapped FIFO is polled for the completion.
2750 * Used only at init time, interrupts from the HBA are disabled.
2751 */
2752static unsigned long pollcomplete(int ctlr)
2753{
2754 unsigned long done;
2755 int i;
2756
2757 /* Wait (up to 20 seconds) for a command to complete */
2758
2759 for (i = 20 * HZ; i > 0; i--) {
2760 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2761 if (done == FIFO_EMPTY)
2762 schedule_timeout_uninterruptible(1);
2763 else
e2019b58 2764 return done;
1da177e4
LT		 2765 }
2766 /* Invalid address to tell caller we ran out of time */
2767 return 1;
2768}
3da8b713 2769
4a4b2d76
SC		 2770/* Send command c to controller h and poll for it to complete.
2771 * Turns interrupts off on the board. Used at driver init time
2772 * and during SCSI error recovery.
1da177e4 2773 */
4a4b2d76 2774static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2775{
1da177e4
LT		 2776 int i;
2777 unsigned long complete;
4a4b2d76 2778 int status = IO_ERROR;
1da177e4 2779 u64bit buff_dma_handle;
1da177e4 2780
4a4b2d76
SC		 2781resend_cmd1:
2782
2783 /* Disable interrupt on the board. */
2784 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2785
1da177e4 2786 /* Make sure there is room in the command FIFO */
7c832835 2787 /* Actually it should be completely empty at this time */
3da8b713 2788 /* unless we are in here doing error handling for the scsi */
2789 /* tape side of the driver. */
7c832835 2790 for (i = 200000; i > 0; i--) {
1da177e4 2791 /* if fifo isn't full go */
4a4b2d76 2792 if (!(h->access.fifo_full(h)))
7c832835 2793 break;
7c832835
BH		 2794 udelay(10);
2795 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2796 " waiting!\n", h->ctlr);
7c832835 2797 }
4a4b2d76 2798 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2799 do {
4a4b2d76 2800 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2801
2802#ifdef CCISS_DEBUG
3da8b713 2803 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2804#endif /* CCISS_DEBUG */
1da177e4 2805
3da8b713 2806 if (complete == 1) {
7c832835
BH		 2807 printk(KERN_WARNING
2808 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2809 "No command list address returned!\n", h->ctlr);
3da8b713 2810 status = IO_ERROR;
3da8b713 2811 break;
2812 }
2813
72f9f132 2814 /* Make sure it's the command we're expecting. */
4a4b2d76 2815 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2816 printk(KERN_WARNING "cciss%d: Unexpected command "
2817 "completion.\n", h->ctlr);
4a4b2d76
SC		 2818 continue;
2819 }
2820
2821 /* It is our command. If no error, we're done. */
2822 if (!(complete & CISS_ERROR_BIT)) {
2823 status = IO_OK;
2824 break;
2825 }
2826
2827 /* There is an error... */
2828
2829 /* if data overrun or underun on Report command ignore it */
2830 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2831 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2832 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2833 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2834 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2835 complete = c->busaddr;
2836 status = IO_OK;
2837 break;
1da177e4 2838 }
4a4b2d76
SC		 2839
2840 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2841 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2842 h->ctlr, c);
2843 if (c->retry_count < MAX_CMD_RETRIES) {
2844 printk(KERN_WARNING "cciss%d: retrying %p\n",
2845 h->ctlr, c);
2846 c->retry_count++;
2847 /* erase the old error information */
2848 memset(c->err_info, 0, sizeof(c->err_info));
2849 goto resend_cmd1;
3da8b713 2850 }
4a4b2d76
SC		 2851 printk(KERN_WARNING "cciss%d: retried %p too many "
2852 "times\n", h->ctlr, c);
2853 status = IO_ERROR;
3c2ab402 2854 break;
4a4b2d76
SC		 2855 }
2856
2857 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2858 printk(KERN_WARNING "cciss%d: command could not be "
2859 "aborted.\n", h->ctlr);
2860 status = IO_ERROR;
3c2ab402 2861 break;
4a4b2d76
SC		 2862 }
2863
4a4b2d76 2864 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2865 status = check_target_status(h, c);
2866 break;
4a4b2d76
SC		 2867 }
2868
3c2ab402 2869 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2870 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2871 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2872 status = IO_ERROR;
3c2ab402 2873 break;
4a4b2d76
SC		 2874
2875 } while (1);
7c832835 2876
1da177e4 2877 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2878 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2879 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2880 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2881 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2882 return status;
2883}
2884
2885/*
2886 * Send a command to the controller, and wait for it to complete.
2887 * Used at init time, and during SCSI error recovery.
2888 */
2889static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2890 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2891{
2892 CommandList_struct *c;
2893 int status;
2894
2895 c = cmd_alloc(hba[ctlr], 1);
2896 if (!c) {
2897 printk(KERN_WARNING "cciss: unable to get memory");
2898 return IO_ERROR;
2899 }
b57695fe 2900 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2901 scsi3addr, cmd_type);
4a4b2d76
SC		 2902 if (status == IO_OK)
2903 status = sendcmd_core(hba[ctlr], c);
2904 cmd_free(hba[ctlr], c, 1);
e2019b58 2905 return status;
7c832835
BH		 2906}
2907
1da177e4
LT		 2908/*
2909 * Map (physical) PCI mem into (virtual) kernel space
2910 */
2911static void __iomem *remap_pci_mem(ulong base, ulong size)
2912{
7c832835
BH		 2913 ulong page_base = ((ulong) base) & PAGE_MASK;
2914 ulong page_offs = ((ulong) base) - page_base;
2915 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2916
7c832835 2917 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2918}
2919
7c832835
BH		 2920/*
2921 * Takes jobs of the Q and sends them to the hardware, then puts it on
2922 * the Q to wait for completion.
2923 */
2924static void start_io(ctlr_info_t *h)
1da177e4
LT		 2925{
2926 CommandList_struct *c;
7c832835 2927
8a3173de
JA		 2928 while (!hlist_empty(&h->reqQ)) {
2929 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2930 /* can't do anything if fifo is full */
2931 if ((h->access.fifo_full(h))) {
2932 printk(KERN_WARNING "cciss: fifo full\n");
2933 break;
2934 }
2935
7c832835 2936 /* Get the first entry from the Request Q */
8a3173de 2937 removeQ(c);
1da177e4 2938 h->Qdepth--;
7c832835
BH		 2939
2940 /* Tell the controller execute command */
1da177e4 2941 h->access.submit_command(h, c);
7c832835
BH		 2942
2943 /* Put job onto the completed Q */
8a3173de 2944 addQ(&h->cmpQ, c);
1da177e4
LT		 2945 }
2946}
7c832835 2947
1da177e4
LT		 2948/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2949/* Zeros out the error record and then resends the command back */
2950/* to the controller */
7c832835 2951static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2952{
2953 /* erase the old error information */
2954 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2955
2956 /* add it to software queue and then send it to the controller */
8a3173de 2957 addQ(&h->reqQ, c);
1da177e4 2958 h->Qdepth++;
7c832835 2959 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2960 h->maxQsinceinit = h->Qdepth;
2961
2962 start_io(h);
2963}
a9925a06 2964
1a614f50
SC		 2965static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2966 unsigned int msg_byte, unsigned int host_byte,
2967 unsigned int driver_byte)
2968{
2969 /* inverse of macros in scsi.h */
2970 return (scsi_status_byte & 0xff) |
2971 ((msg_byte & 0xff) << 8) |
2972 ((host_byte & 0xff) << 16) |
2973 ((driver_byte & 0xff) << 24);
2974}
2975
0a9279cc
MM		 2976static inline int evaluate_target_status(ctlr_info_t *h,
2977 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2978{
2979 unsigned char sense_key;
1a614f50
SC		 2980 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2981 int error_value;
2982
0a9279cc 2983 *retry_cmd = 0;
1a614f50
SC		 2984 /* If we get in here, it means we got "target status", that is, scsi status */
2985 status_byte = cmd->err_info->ScsiStatus;
2986 driver_byte = DRIVER_OK;
2987 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2988
2989 if (blk_pc_request(cmd->rq))
2990 host_byte = DID_PASSTHROUGH;
2991 else
2992 host_byte = DID_OK;
2993
2994 error_value = make_status_bytes(status_byte, msg_byte,
2995 host_byte, driver_byte);
03bbfee5 2996
1a614f50 2997 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2998 if (!blk_pc_request(cmd->rq))
2999 printk(KERN_WARNING "cciss: cmd %p "
3000 "has SCSI Status 0x%x\n",
3001 cmd, cmd->err_info->ScsiStatus);
1a614f50 3002 return error_value;
03bbfee5
MMOD		 3003 }
3004
3005 /* check the sense key */
3006 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3007 /* no status or recovered error */
1a614f50
SC		 3008 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
3009 error_value = 0;
03bbfee5 3010
0a9279cc
MM		 3011 if (check_for_unit_attention(h, cmd)) {
3012 *retry_cmd = !blk_pc_request(cmd->rq);
3013 return 0;
3014 }
3015
03bbfee5 3016 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 3017 if (error_value != 0)
03bbfee5
MMOD		 3018 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3019 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3020 return error_value;
03bbfee5
MMOD		 3021 }
3022
3023 /* SG_IO or similar, copy sense data back */
3024 if (cmd->rq->sense) {
3025 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3026 cmd->rq->sense_len = cmd->err_info->SenseLen;
3027 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3028 cmd->rq->sense_len);
3029 } else
3030 cmd->rq->sense_len = 0;
3031
1a614f50 3032 return error_value;
03bbfee5
MMOD		 3033}
3034
7c832835 3035/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3036 * buffers for the completed job. Note that this function does not need
3037 * to hold the hba/queue lock.
7c832835
BH		 3038 */
3039static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3040 int timeout)
1da177e4 3041{
1da177e4 3042 int retry_cmd = 0;
198b7660
MMOD		 3043 struct request *rq = cmd->rq;
3044
3045 rq->errors = 0;
7c832835 3046
1da177e4 3047 if (timeout)
1a614f50 3048 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3049
d38ae168
MMOD		 3050 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3051 goto after_error_processing;
7c832835 3052
d38ae168 3053 switch (cmd->err_info->CommandStatus) {
d38ae168 3054 case CMD_TARGET_STATUS:
0a9279cc 3055 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3056 break;
3057 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3058 if (blk_fs_request(cmd->rq)) {
3059 printk(KERN_WARNING "cciss: cmd %p has"
3060 " completed with data underrun "
3061 "reported\n", cmd);
c3a4d78c 3062 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3063 }
d38ae168
MMOD		 3064 break;
3065 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3066 if (blk_fs_request(cmd->rq))
3067 printk(KERN_WARNING "cciss: cmd %p has"
3068 " completed with data overrun "
3069 "reported\n", cmd);
d38ae168
MMOD		 3070 break;
3071 case CMD_INVALID:
3072 printk(KERN_WARNING "cciss: cmd %p is "
3073 "reported invalid\n", cmd);
1a614f50
SC		 3074 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3075 cmd->err_info->CommandStatus, DRIVER_OK,
3076 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3077 break;
3078 case CMD_PROTOCOL_ERR:
3079 printk(KERN_WARNING "cciss: cmd %p has "
3080 "protocol error \n", cmd);
1a614f50
SC		 3081 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3082 cmd->err_info->CommandStatus, DRIVER_OK,
3083 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3084 break;
3085 case CMD_HARDWARE_ERR:
3086 printk(KERN_WARNING "cciss: cmd %p had "
3087 " hardware error\n", cmd);
1a614f50
SC		 3088 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3089 cmd->err_info->CommandStatus, DRIVER_OK,
3090 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3091 break;
3092 case CMD_CONNECTION_LOST:
3093 printk(KERN_WARNING "cciss: cmd %p had "
3094 "connection lost\n", cmd);
1a614f50
SC		 3095 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3096 cmd->err_info->CommandStatus, DRIVER_OK,
3097 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3098 break;
3099 case CMD_ABORTED:
3100 printk(KERN_WARNING "cciss: cmd %p was "
3101 "aborted\n", cmd);
1a614f50
SC		 3102 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3103 cmd->err_info->CommandStatus, DRIVER_OK,
3104 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3105 break;
3106 case CMD_ABORT_FAILED:
3107 printk(KERN_WARNING "cciss: cmd %p reports "
3108 "abort failed\n", cmd);
1a614f50
SC		 3109 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3110 cmd->err_info->CommandStatus, DRIVER_OK,
3111 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3112 break;
3113 case CMD_UNSOLICITED_ABORT:
3114 printk(KERN_WARNING "cciss%d: unsolicited "
3115 "abort %p\n", h->ctlr, cmd);
3116 if (cmd->retry_count < MAX_CMD_RETRIES) {
3117 retry_cmd = 1;
3118 printk(KERN_WARNING
3119 "cciss%d: retrying %p\n", h->ctlr, cmd);
3120 cmd->retry_count++;
3121 } else
3122 printk(KERN_WARNING
3123 "cciss%d: %p retried too "
3124 "many times\n", h->ctlr, 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_TIMEOUT:
3130 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3131 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3132 cmd->err_info->CommandStatus, DRIVER_OK,
3133 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3134 break;
3135 default:
3136 printk(KERN_WARNING "cciss: cmd %p returned "
3137 "unknown status %x\n", cmd,
3138 cmd->err_info->CommandStatus);
1a614f50
SC		 3139 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3140 cmd->err_info->CommandStatus, DRIVER_OK,
3141 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3142 }
d38ae168
MMOD		 3143
3144after_error_processing:
3145
1da177e4 3146 /* We need to return this command */
7c832835
BH		 3147 if (retry_cmd) {
3148 resend_cciss_cmd(h, cmd);
1da177e4 3149 return;
7c832835 3150 }
03bbfee5 3151 cmd->rq->completion_data = cmd;
a9925a06 3152 blk_complete_request(cmd->rq);
1da177e4
LT		 3153}
3154
7c832835
BH		 3155/*
3156 * Get a request and submit it to the controller.
1da177e4 3157 */
165125e1 3158static void do_cciss_request(struct request_queue *q)
1da177e4 3159{
7c832835 3160 ctlr_info_t *h = q->queuedata;
1da177e4 3161 CommandList_struct *c;
00988a35
MMOD		 3162 sector_t start_blk;
3163 int seg;
1da177e4
LT		 3164 struct request *creq;
3165 u64bit temp64;
3166 struct scatterlist tmp_sg[MAXSGENTRIES];
3167 drive_info_struct *drv;
3168 int i, dir;
3169
3170 /* We call start_io here in case there is a command waiting on the
3171 * queue that has not been sent.
7c832835 3172 */
1da177e4
LT		 3173 if (blk_queue_plugged(q))
3174 goto startio;
3175
7c832835 3176 queue:
9934c8c0 3177 creq = blk_peek_request(q);
1da177e4
LT		 3178 if (!creq)
3179 goto startio;
3180
089fe1b2 3181 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3182
7c832835 3183 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3184 goto full;
3185
9934c8c0 3186 blk_start_request(creq);
1da177e4
LT		 3187
3188 spin_unlock_irq(q->queue_lock);
3189
3190 c->cmd_type = CMD_RWREQ;
3191 c->rq = creq;
7c832835
BH		 3192
3193 /* fill in the request */
1da177e4 3194 drv = creq->rq_disk->private_data;
7c832835 3195 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3196 /* got command from pool, so use the command block index instead */
3197 /* for direct lookups. */
3198 /* The first 2 bits are reserved for controller error reporting. */
3199 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3200 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3201 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
7c832835
BH		 3202 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3203 c->Request.Type.Type = TYPE_CMD; // It is a command.
3204 c->Request.Type.Attribute = ATTR_SIMPLE;
3205 c->Request.Type.Direction =
a52de245 3206 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3207 c->Request.Timeout = 0; // Don't time out
3208 c->Request.CDB[0] =
00988a35 3209 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3210 start_blk = blk_rq_pos(creq);
1da177e4 3211#ifdef CCISS_DEBUG
83096ebf
TH		 3212 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3213 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3214#endif /* CCISS_DEBUG */
1da177e4 3215
45711f1a 3216 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3217 seg = blk_rq_map_sg(q, creq, tmp_sg);
3218
7c832835 3219 /* get the DMA records for the setup */
1da177e4
LT		 3220 if (c->Request.Type.Direction == XFER_READ)
3221 dir = PCI_DMA_FROMDEVICE;
3222 else
3223 dir = PCI_DMA_TODEVICE;
3224
7c832835 3225 for (i = 0; i < seg; i++) {
1da177e4 3226 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3227 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3228 tmp_sg[i].offset,
3229 tmp_sg[i].length, dir);
1da177e4 3230 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3231 c->SG[i].Addr.upper = temp64.val32.upper;
3232 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3233 }
7c832835
BH		 3234 /* track how many SG entries we are using */
3235 if (seg > h->maxSG)
3236 h->maxSG = seg;
1da177e4
LT		 3237
3238#ifdef CCISS_DEBUG
83096ebf
TH		 3239 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3240 blk_rq_sectors(creq), seg);
7c832835 3241#endif /* CCISS_DEBUG */
1da177e4
LT		 3242
3243 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3244 if (likely(blk_fs_request(creq))) {
3245 if(h->cciss_read == CCISS_READ_10) {
3246 c->Request.CDB[1] = 0;
3247 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3248 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3249 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3250 c->Request.CDB[5] = start_blk & 0xff;
3251 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3252 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3253 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3254 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3255 } else {
582539e5
RD		 3256 u32 upper32 = upper_32_bits(start_blk);
3257
03bbfee5
MMOD		 3258 c->Request.CDBLen = 16;
3259 c->Request.CDB[1]= 0;
582539e5
RD		 3260 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3261 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3262 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3263 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3264 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3265 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3266 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3267 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3268 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3269 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3270 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3271 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3272 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3273 }
3274 } else if (blk_pc_request(creq)) {
3275 c->Request.CDBLen = creq->cmd_len;
3276 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3277 } else {
03bbfee5
MMOD		 3278 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3279 BUG();
00988a35 3280 }
1da177e4
LT		 3281
3282 spin_lock_irq(q->queue_lock);
3283
8a3173de 3284 addQ(&h->reqQ, c);
1da177e4 3285 h->Qdepth++;
7c832835
BH		 3286 if (h->Qdepth > h->maxQsinceinit)
3287 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3288
3289 goto queue;
00988a35 3290full:
1da177e4 3291 blk_stop_queue(q);
00988a35 3292startio:
1da177e4
LT		 3293 /* We will already have the driver lock here so not need
3294 * to lock it.
7c832835 3295 */
1da177e4
LT		 3296 start_io(h);
3297}
3298
3da8b713 3299static inline unsigned long get_next_completion(ctlr_info_t *h)
3300{
3da8b713 3301 return h->access.command_completed(h);
3da8b713 3302}
3303
3304static inline int interrupt_pending(ctlr_info_t *h)
3305{
3da8b713 3306 return h->access.intr_pending(h);
3da8b713 3307}
3308
3309static inline long interrupt_not_for_us(ctlr_info_t *h)
3310{
7c832835 3311 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3312 (h->interrupts_enabled == 0)));
3da8b713 3313}
3314
7d12e780 3315static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3316{
3317 ctlr_info_t *h = dev_id;
3318 CommandList_struct *c;
3319 unsigned long flags;
33079b21 3320 __u32 a, a1, a2;
1da177e4 3321
3da8b713 3322 if (interrupt_not_for_us(h))
1da177e4 3323 return IRQ_NONE;
1da177e4
LT		 3324 /*
3325 * If there are completed commands in the completion queue,
3326 * we had better do something about it.
3327 */
3328 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3329 while (interrupt_pending(h)) {
7c832835 3330 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3331 a1 = a;
33079b21
MM		 3332 if ((a & 0x04)) {
3333 a2 = (a >> 3);
f880632f 3334 if (a2 >= h->nr_cmds) {
7c832835
BH		 3335 printk(KERN_WARNING
3336 "cciss: controller cciss%d failed, stopping.\n",
3337 h->ctlr);
33079b21
MM		 3338 fail_all_cmds(h->ctlr);
3339 return IRQ_HANDLED;
3340 }
3341
3342 c = h->cmd_pool + a2;
3343 a = c->busaddr;
3344
3345 } else {
8a3173de
JA		 3346 struct hlist_node *tmp;
3347
7c832835 3348 a &= ~3;
8a3173de
JA		 3349 c = NULL;
3350 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3351 if (c->busaddr == a)
7c832835
BH		 3352 break;
3353 }
33079b21 3354 }
1da177e4
LT		 3355 /*
3356 * If we've found the command, take it off the
3357 * completion Q and free it
3358 */
8a3173de
JA		 3359 if (c && c->busaddr == a) {
3360 removeQ(c);
1da177e4
LT		 3361 if (c->cmd_type == CMD_RWREQ) {
3362 complete_command(h, c, 0);
3363 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3364 complete(c->waiting);
3365 }
3366# ifdef CONFIG_CISS_SCSI_TAPE
3367 else if (c->cmd_type == CMD_SCSI)
3368 complete_scsi_command(c, 0, a1);
3369# endif
3370 continue;
3371 }
3372 }
3373 }
3374
1da177e4
LT		 3375 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3376 return IRQ_HANDLED;
3377}
7c832835 3378
b368c9dd
AP		 3379/**
3380 * add_to_scan_list() - add controller to rescan queue
3381 * @h: Pointer to the controller.
3382 *
3383 * Adds the controller to the rescan queue if not already on the queue.
3384 *
3385 * returns 1 if added to the queue, 0 if skipped (could be on the
3386 * queue already, or the controller could be initializing or shutting
3387 * down).
3388 **/
3389static int add_to_scan_list(struct ctlr_info *h)
3390{
3391 struct ctlr_info *test_h;
3392 int found = 0;
3393 int ret = 0;
3394
3395 if (h->busy_initializing)
3396 return 0;
3397
3398 if (!mutex_trylock(&h->busy_shutting_down))
3399 return 0;
3400
3401 mutex_lock(&scan_mutex);
3402 list_for_each_entry(test_h, &scan_q, scan_list) {
3403 if (test_h == h) {
3404 found = 1;
3405 break;
3406 }
3407 }
3408 if (!found && !h->busy_scanning) {
3409 INIT_COMPLETION(h->scan_wait);
3410 list_add_tail(&h->scan_list, &scan_q);
3411 ret = 1;
3412 }
3413 mutex_unlock(&scan_mutex);
3414 mutex_unlock(&h->busy_shutting_down);
3415
3416 return ret;
3417}
3418
3419/**
3420 * remove_from_scan_list() - remove controller from rescan queue
3421 * @h: Pointer to the controller.
3422 *
3423 * Removes the controller from the rescan queue if present. Blocks if
3424 * the controller is currently conducting a rescan.
3425 **/
3426static void remove_from_scan_list(struct ctlr_info *h)
3427{
3428 struct ctlr_info *test_h, *tmp_h;
3429 int scanning = 0;
3430
3431 mutex_lock(&scan_mutex);
3432 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3433 if (test_h == h) {
3434 list_del(&h->scan_list);
3435 complete_all(&h->scan_wait);
3436 mutex_unlock(&scan_mutex);
3437 return;
3438 }
3439 }
3440 if (&h->busy_scanning)
3441 scanning = 0;
3442 mutex_unlock(&scan_mutex);
3443
3444 if (scanning)
3445 wait_for_completion(&h->scan_wait);
3446}
3447
3448/**
3449 * scan_thread() - kernel thread used to rescan controllers
3450 * @data: Ignored.
3451 *
3452 * A kernel thread used scan for drive topology changes on
3453 * controllers. The thread processes only one controller at a time
3454 * using a queue. Controllers are added to the queue using
3455 * add_to_scan_list() and removed from the queue either after done
3456 * processing or using remove_from_scan_list().
3457 *
3458 * returns 0.
3459 **/
0a9279cc
MM		 3460static int scan_thread(void *data)
3461{
b368c9dd 3462 struct ctlr_info *h;
0a9279cc 3463
b368c9dd
AP		 3464 while (1) {
3465 set_current_state(TASK_INTERRUPTIBLE);
3466 schedule();
0a9279cc
MM		 3467 if (kthread_should_stop())
3468 break;
b368c9dd
AP		 3469
3470 while (1) {
3471 mutex_lock(&scan_mutex);
3472 if (list_empty(&scan_q)) {
3473 mutex_unlock(&scan_mutex);
3474 break;
3475 }
3476
3477 h = list_entry(scan_q.next,
3478 struct ctlr_info,
3479 scan_list);
3480 list_del(&h->scan_list);
3481 h->busy_scanning = 1;
3482 mutex_unlock(&scan_mutex);
3483
3484 if (h) {
2d11d993 3485 rebuild_lun_table(h, 0, 0);
b368c9dd
AP		 3486 complete_all(&h->scan_wait);
3487 mutex_lock(&scan_mutex);
3488 h->busy_scanning = 0;
3489 mutex_unlock(&scan_mutex);
3490 }
3491 }
0a9279cc 3492 }
b368c9dd 3493
0a9279cc
MM		 3494 return 0;
3495}
3496
3497static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3498{
3499 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3500 return 0;
3501
3502 switch (c->err_info->SenseInfo[12]) {
3503 case STATE_CHANGED:
3504 printk(KERN_WARNING "cciss%d: a state change "
3505 "detected, command retried\n", h->ctlr);
3506 return 1;
3507 break;
3508 case LUN_FAILED:
3509 printk(KERN_WARNING "cciss%d: LUN failure "
3510 "detected, action required\n", h->ctlr);
3511 return 1;
3512 break;
3513 case REPORT_LUNS_CHANGED:
3514 printk(KERN_WARNING "cciss%d: report LUN data "
3515 "changed\n", h->ctlr);
b368c9dd
AP		 3516 add_to_scan_list(h);
3517 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3518 return 1;
3519 break;
3520 case POWER_OR_RESET:
3521 printk(KERN_WARNING "cciss%d: a power on "
3522 "or device reset detected\n", h->ctlr);
3523 return 1;
3524 break;
3525 case UNIT_ATTENTION_CLEARED:
3526 printk(KERN_WARNING "cciss%d: unit attention "
3527 "cleared by another initiator\n", h->ctlr);
3528 return 1;
3529 break;
3530 default:
3531 printk(KERN_WARNING "cciss%d: unknown "
3532 "unit attention detected\n", h->ctlr);
3533 return 1;
3534 }
3535}
3536
7c832835 3537/*
d14c4ab5 3538 * We cannot read the structure directly, for portability we must use
1da177e4 3539 * the io functions.
7c832835 3540 * This is for debug only.
1da177e4
LT		 3541 */
3542#ifdef CCISS_DEBUG
7c832835 3543static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3544{
3545 int i;
3546 char temp_name[17];
3547
3548 printk("Controller Configuration information\n");
3549 printk("------------------------------------\n");
7c832835 3550 for (i = 0; i < 4; i++)
1da177e4 3551 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3552 temp_name[4] = '\0';
3553 printk(" Signature = %s\n", temp_name);
1da177e4 3554 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3555 printk(" Transport methods supported = 0x%x\n",
3556 readl(&(tb->TransportSupport)));
3557 printk(" Transport methods active = 0x%x\n",
3558 readl(&(tb->TransportActive)));
3559 printk(" Requested transport Method = 0x%x\n",
3560 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3561 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3562 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3563 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3564 readl(&(tb->HostWrite.CoalIntCount)));
3565 printk(" Max outstanding commands = 0x%d\n",
3566 readl(&(tb->CmdsOutMax)));
3567 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3568 for (i = 0; i < 16; i++)
1da177e4
LT		 3569 temp_name[i] = readb(&(tb->ServerName[i]));
3570 temp_name[16] = '\0';
3571 printk(" Server Name = %s\n", temp_name);
7c832835 3572 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3573}
7c832835 3574#endif /* CCISS_DEBUG */
1da177e4 3575
7c832835 3576static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3577{
3578 int i, offset, mem_type, bar_type;
7c832835 3579 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3580 return 0;
3581 offset = 0;
7c832835
BH		 3582 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3583 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3584 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3585 offset += 4;
3586 else {
3587 mem_type = pci_resource_flags(pdev, i) &
7c832835 3588 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3589 switch (mem_type) {
7c832835
BH		 3590 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3591 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3592 offset += 4; /* 32 bit */
3593 break;
3594 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3595 offset += 8;
3596 break;
3597 default: /* reserved in PCI 2.2 */
3598 printk(KERN_WARNING
3599 "Base address is invalid\n");
3600 return -1;
1da177e4
LT		 3601 break;
3602 }
3603 }
7c832835
BH		 3604 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3605 return i + 1;
1da177e4
LT		 3606 }
3607 return -1;
3608}
3609
fb86a35b
MM		 3610/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3611 * controllers that are capable. If not, we use IO-APIC mode.
3612 */
3613
7c832835
BH		 3614static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3615 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3616{
3617#ifdef CONFIG_PCI_MSI
7c832835
BH		 3618 int err;
3619 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3620 {0, 2}, {0, 3}
3621 };
fb86a35b
MM		 3622
3623 /* Some boards advertise MSI but don't really support it */
3624 if ((board_id == 0x40700E11) ||
7c832835
BH		 3625 (board_id == 0x40800E11) ||
3626 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3627 goto default_int_mode;
3628
7c832835
BH		 3629 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3630 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3631 if (!err) {
3632 c->intr[0] = cciss_msix_entries[0].vector;
3633 c->intr[1] = cciss_msix_entries[1].vector;
3634 c->intr[2] = cciss_msix_entries[2].vector;
3635 c->intr[3] = cciss_msix_entries[3].vector;
3636 c->msix_vector = 1;
3637 return;
3638 }
3639 if (err > 0) {
3640 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3641 "available\n", err);
1ecb9c0f 3642 goto default_int_mode;
7c832835
BH		 3643 } else {
3644 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3645 err);
1ecb9c0f 3646 goto default_int_mode;
7c832835
BH		 3647 }
3648 }
3649 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3650 if (!pci_enable_msi(pdev)) {
7c832835 3651 c->msi_vector = 1;
7c832835
BH		 3652 } else {
3653 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3654 }
3655 }
1ecb9c0f 3656default_int_mode:
7c832835 3657#endif /* CONFIG_PCI_MSI */
fb86a35b 3658 /* if we get here we're going to use the default interrupt mode */
7c832835 3659 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3660 return;
3661}
3662
7d1fd970 3663static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3664{
3665 ushort subsystem_vendor_id, subsystem_device_id, command;
3666 __u32 board_id, scratchpad = 0;
3667 __u64 cfg_offset;
3668 __u32 cfg_base_addr;
3669 __u64 cfg_base_addr_index;
c33ac89b 3670 int i, err;
1da177e4
LT		 3671
3672 /* check to see if controller has been disabled */
3673 /* BEFORE trying to enable it */
7c832835
BH		 3674 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3675 if (!(command & 0x02)) {
3676 printk(KERN_WARNING
3677 "cciss: controller appears to be disabled\n");
c33ac89b 3678 return -ENODEV;
1da177e4
LT		 3679 }
3680
c33ac89b 3681 err = pci_enable_device(pdev);
7c832835 3682 if (err) {
1da177e4 3683 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3684 return err;
1da177e4 3685 }
1da177e4 3686
4e570309
BH		 3687 err = pci_request_regions(pdev, "cciss");
3688 if (err) {
3689 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3690 "aborting\n");
872225ca 3691 return err;
4e570309
BH		 3692 }
3693
1da177e4
LT		 3694 subsystem_vendor_id = pdev->subsystem_vendor;
3695 subsystem_device_id = pdev->subsystem_device;
3696 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3697 subsystem_vendor_id);
1da177e4 3698
1da177e4
LT		 3699#ifdef CCISS_DEBUG
3700 printk("command = %x\n", command);
3701 printk("irq = %x\n", pdev->irq);
3702 printk("board_id = %x\n", board_id);
7c832835 3703#endif /* CCISS_DEBUG */
1da177e4 3704
fb86a35b
MM		 3705/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3706 * else we use the IO-APIC interrupt assigned to us by system ROM.
3707 */
3708 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3709
e1438581
MM		 3710 /* find the memory BAR */
3711 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3712 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3713 break;
3714 }
3715 if (i == DEVICE_COUNT_RESOURCE) {
3716 printk(KERN_WARNING "cciss: No memory BAR found\n");
3717 err = -ENODEV;
3718 goto err_out_free_res;
3719 }
3720
3721 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3722 * already removed
3723 */
1da177e4 3724
1da177e4 3725#ifdef CCISS_DEBUG
9f92f471 3726 printk("address 0 = %lx\n", c->paddr);
7c832835 3727#endif /* CCISS_DEBUG */
a5b92873 3728 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3729
3730 /* Wait for the board to become ready. (PCI hotplug needs this.)
3731 * We poll for up to 120 secs, once per 100ms. */
7c832835 3732 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3733 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3734 if (scratchpad == CCISS_FIRMWARE_READY)
3735 break;
3736 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3737 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3738 }
3739 if (scratchpad != CCISS_FIRMWARE_READY) {
3740 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3741 err = -ENODEV;
4e570309 3742 goto err_out_free_res;
1da177e4
LT		 3743 }
3744
3745 /* get the address index number */
3746 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3747 cfg_base_addr &= (__u32) 0x0000ffff;
3748#ifdef CCISS_DEBUG
3749 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3750#endif /* CCISS_DEBUG */
3751 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3752#ifdef CCISS_DEBUG
9f92f471
RD		 3753 printk("cfg base address index = %llx\n",
3754 (unsigned long long)cfg_base_addr_index);
7c832835 3755#endif /* CCISS_DEBUG */
1da177e4
LT		 3756 if (cfg_base_addr_index == -1) {
3757 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3758 err = -ENODEV;
4e570309 3759 goto err_out_free_res;
1da177e4
LT		 3760 }
3761
3762 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3763#ifdef CCISS_DEBUG
9f92f471 3764 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3765#endif /* CCISS_DEBUG */
3766 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3767 cfg_base_addr_index) +
3768 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3769 c->board_id = board_id;
3770
3771#ifdef CCISS_DEBUG
945f390f 3772 print_cfg_table(c->cfgtable);
7c832835 3773#endif /* CCISS_DEBUG */
1da177e4 3774
49153998
MM		 3775 /* Some controllers support Zero Memory Raid (ZMR).
3776 * When configured in ZMR mode the number of supported
3777 * commands drops to 64. So instead of just setting an
3778 * arbitrary value we make the driver a little smarter.
3779 * We read the config table to tell us how many commands
3780 * are supported on the controller then subtract 4 to
3781 * leave a little room for ioctl calls.
3782 */
3783 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3784 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3785 if (board_id == products[i].board_id) {
3786 c->product_name = products[i].product_name;
3787 c->access = *(products[i].access);
49153998 3788 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3789 break;
3790 }
3791 }
7c832835
BH		 3792 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3793 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3794 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3795 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3796 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3797 err = -ENODEV;
4e570309 3798 goto err_out_free_res;
1da177e4 3799 }
4ff9a9a4
MM		 3800 /* We didn't find the controller in our list. We know the
3801 * signature is valid. If it's an HP device let's try to
3802 * bind to the device and fire it up. Otherwise we bail.
3803 */
3804 if (i == ARRAY_SIZE(products)) {
3805 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3806 c->product_name = products[i-1].product_name;
3807 c->access = *(products[i-1].access);
49153998 3808 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3809 printk(KERN_WARNING "cciss: This is an unknown "
3810 "Smart Array controller.\n"
3811 "cciss: Please update to the latest driver "
3812 "available from www.hp.com.\n");
3813 } else {
3814 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3815 " to access the Smart Array controller %08lx\n"
3816 , (unsigned long)board_id);
3817 err = -ENODEV;
3818 goto err_out_free_res;
3819 }
3820 }
1da177e4 3821#ifdef CONFIG_X86
7c832835
BH		 3822 {
3823 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3824 __u32 prefetch;
3825 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3826 prefetch |= 0x100;
3827 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3828 }
1da177e4
LT		 3829#endif
3830
8bf50f71
MMOD		 3831 /* Disabling DMA prefetch and refetch for the P600.
3832 * An ASIC bug may result in accesses to invalid memory addresses.
3833 * We've disabled prefetch for some time now. Testing with XEN
3834 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3835 */
3836 if(board_id == 0x3225103C) {
3837 __u32 dma_prefetch;
8bf50f71 3838 __u32 dma_refetch;
f92e2f5f
MM		 3839 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3840 dma_prefetch |= 0x8000;
3841 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3842 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3843 dma_refetch |= 0x1;
3844 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3845 }
3846
1da177e4
LT		 3847#ifdef CCISS_DEBUG
3848 printk("Trying to put board into Simple mode\n");
7c832835 3849#endif /* CCISS_DEBUG */
1da177e4 3850 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3851 /* Update the field, and then ring the doorbell */
3852 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3853 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3854
3855 /* under certain very rare conditions, this can take awhile.
3856 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3857 * as we enter this code.) */
7c832835 3858 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3859 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3860 break;
3861 /* delay and try again */
3862 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3863 schedule_timeout(msecs_to_jiffies(1));
7c832835 3864 }
1da177e4
LT		 3865
3866#ifdef CCISS_DEBUG
7c832835
BH		 3867 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3868 readl(c->vaddr + SA5_DOORBELL));
3869#endif /* CCISS_DEBUG */
1da177e4 3870#ifdef CCISS_DEBUG
7c832835
BH		 3871 print_cfg_table(c->cfgtable);
3872#endif /* CCISS_DEBUG */
1da177e4 3873
7c832835 3874 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3875 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3876 " simple mode\n");
c33ac89b 3877 err = -ENODEV;
4e570309 3878 goto err_out_free_res;
1da177e4
LT		 3879 }
3880 return 0;
3881
5faad620 3882err_out_free_res:
872225ca
MM		 3883 /*
3884 * Deliberately omit pci_disable_device(): it does something nasty to
3885 * Smart Array controllers that pci_enable_device does not undo
3886 */
4e570309 3887 pci_release_regions(pdev);
c33ac89b 3888 return err;
1da177e4
LT		 3889}
3890
6ae5ce8e
MM		 3891/* Function to find the first free pointer into our hba[] array
3892 * Returns -1 if no free entries are left.
7c832835 3893 */
1da177e4
LT		 3894static int alloc_cciss_hba(void)
3895{
799202cb 3896 int i;
1da177e4 3897
7c832835 3898 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3899 if (!hba[i]) {
3900 ctlr_info_t *p;
f2912a12 3901
06ff37ff 3902 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3903 if (!p)
3904 goto Enomem;
1da177e4
LT		 3905 hba[i] = p;
3906 return i;
3907 }
3908 }
3909 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3910 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3911 return -1;
3912Enomem:
1da177e4 3913 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3914 return -1;
3915}
3916
2c935593 3917static void free_hba(int n)
1da177e4 3918{
2c935593
SC		 3919 ctlr_info_t *h = hba[n];
3920 int i;
1da177e4 3921
2c935593
SC		 3922 hba[n] = NULL;
3923 for (i = 0; i < h->highest_lun + 1; i++)
3924 if (h->gendisk[i] != NULL)
3925 put_disk(h->gendisk[i]);
3926 kfree(h);
1da177e4
LT		 3927}
3928
82eb03cf
CC		 3929/* Send a message CDB to the firmware. */
3930static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3931{
3932 typedef struct {
3933 CommandListHeader_struct CommandHeader;
3934 RequestBlock_struct Request;
3935 ErrDescriptor_struct ErrorDescriptor;
3936 } Command;
3937 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3938 Command *cmd;
3939 dma_addr_t paddr64;
3940 uint32_t paddr32, tag;
3941 void __iomem *vaddr;
3942 int i, err;
3943
3944 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3945 if (vaddr == NULL)
3946 return -ENOMEM;
3947
3948 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3949 CCISS commands, so they must be allocated from the lower 4GiB of
3950 memory. */
e930438c 3951 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3952 if (err) {
3953 iounmap(vaddr);
3954 return -ENOMEM;
3955 }
3956
3957 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3958 if (cmd == NULL) {
3959 iounmap(vaddr);
3960 return -ENOMEM;
3961 }
3962
3963 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3964 although there's no guarantee, we assume that the address is at
3965 least 4-byte aligned (most likely, it's page-aligned). */
3966 paddr32 = paddr64;
3967
3968 cmd->CommandHeader.ReplyQueue = 0;
3969 cmd->CommandHeader.SGList = 0;
3970 cmd->CommandHeader.SGTotal = 0;
3971 cmd->CommandHeader.Tag.lower = paddr32;
3972 cmd->CommandHeader.Tag.upper = 0;
3973 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3974
3975 cmd->Request.CDBLen = 16;
3976 cmd->Request.Type.Type = TYPE_MSG;
3977 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3978 cmd->Request.Type.Direction = XFER_NONE;
3979 cmd->Request.Timeout = 0; /* Don't time out */
3980 cmd->Request.CDB[0] = opcode;
3981 cmd->Request.CDB[1] = type;
3982 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3983
3984 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3985 cmd->ErrorDescriptor.Addr.upper = 0;
3986 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3987
3988 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3989
3990 for (i = 0; i < 10; i++) {
3991 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3992 if ((tag & ~3) == paddr32)
3993 break;
3994 schedule_timeout_uninterruptible(HZ);
3995 }
3996
3997 iounmap(vaddr);
3998
3999 /* we leak the DMA buffer here ... no choice since the controller could
4000 still complete the command. */
4001 if (i == 10) {
4002 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4003 opcode, type);
4004 return -ETIMEDOUT;
4005 }
4006
4007 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4008
4009 if (tag & 2) {
4010 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4011 opcode, type);
4012 return -EIO;
4013 }
4014
4015 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4016 opcode, type);
4017 return 0;
4018}
4019
4020#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4021#define cciss_noop(p) cciss_message(p, 3, 0)
4022
4023static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4024{
4025/* the #defines are stolen from drivers/pci/msi.h. */
4026#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4027#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4028
4029 int pos;
4030 u16 control = 0;
4031
4032 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4033 if (pos) {
4034 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4035 if (control & PCI_MSI_FLAGS_ENABLE) {
4036 printk(KERN_INFO "cciss: resetting MSI\n");
4037 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4038 }
4039 }
4040
4041 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4042 if (pos) {
4043 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4044 if (control & PCI_MSIX_FLAGS_ENABLE) {
4045 printk(KERN_INFO "cciss: resetting MSI-X\n");
4046 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4047 }
4048 }
4049
4050 return 0;
4051}
4052
4053/* This does a hard reset of the controller using PCI power management
4054 * states. */
4055static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4056{
4057 u16 pmcsr, saved_config_space[32];
4058 int i, pos;
4059
4060 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4061
4062 /* This is very nearly the same thing as
4063
4064 pci_save_state(pci_dev);
4065 pci_set_power_state(pci_dev, PCI_D3hot);
4066 pci_set_power_state(pci_dev, PCI_D0);
4067 pci_restore_state(pci_dev);
4068
4069 but we can't use these nice canned kernel routines on
4070 kexec, because they also check the MSI/MSI-X state in PCI
4071 configuration space and do the wrong thing when it is
4072 set/cleared. Also, the pci_save/restore_state functions
4073 violate the ordering requirements for restoring the
4074 configuration space from the CCISS document (see the
4075 comment below). So we roll our own .... */
4076
4077 for (i = 0; i < 32; i++)
4078 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4079
4080 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4081 if (pos == 0) {
4082 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4083 return -ENODEV;
4084 }
4085
4086 /* Quoting from the Open CISS Specification: "The Power
4087 * Management Control/Status Register (CSR) controls the power
4088 * state of the device. The normal operating state is D0,
4089 * CSR=00h. The software off state is D3, CSR=03h. To reset
4090 * the controller, place the interface device in D3 then to
4091 * D0, this causes a secondary PCI reset which will reset the
4092 * controller." */
4093
4094 /* enter the D3hot power management state */
4095 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4096 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4097 pmcsr |= PCI_D3hot;
4098 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4099
4100 schedule_timeout_uninterruptible(HZ >> 1);
4101
4102 /* enter the D0 power management state */
4103 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4104 pmcsr |= PCI_D0;
4105 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4106
4107 schedule_timeout_uninterruptible(HZ >> 1);
4108
4109 /* Restore the PCI configuration space. The Open CISS
4110 * Specification says, "Restore the PCI Configuration
4111 * Registers, offsets 00h through 60h. It is important to
4112 * restore the command register, 16-bits at offset 04h,
4113 * last. Do not restore the configuration status register,
4114 * 16-bits at offset 06h." Note that the offset is 2*i. */
4115 for (i = 0; i < 32; i++) {
4116 if (i == 2 || i == 3)
4117 continue;
4118 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4119 }
4120 wmb();
4121 pci_write_config_word(pdev, 4, saved_config_space[2]);
4122
4123 return 0;
4124}
4125
1da177e4
LT		 4126/*
4127 * This is it. Find all the controllers and register them. I really hate
4128 * stealing all these major device numbers.
4129 * returns the number of block devices registered.
4130 */
4131static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4132 const struct pci_device_id *ent)
1da177e4 4133{
1da177e4 4134 int i;
799202cb 4135 int j = 0;
1da177e4 4136 int rc;
22bece00 4137 int dac, return_code;
212a5026 4138 InquiryData_struct *inq_buff;
1da177e4 4139
82eb03cf
CC		 4140 if (reset_devices) {
4141 /* Reset the controller with a PCI power-cycle */
4142 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4143 return -ENODEV;
4144
5e18cfd0
JA		 4145 /* Now try to get the controller to respond to a no-op. Some
4146 devices (notably the HP Smart Array 5i Controller) need
4147 up to 30 seconds to respond. */
5e4c91c8 4148 for (i=0; i<30; i++) {
82eb03cf
CC		 4149 if (cciss_noop(pdev) == 0)
4150 break;
5e4c91c8
JA		 4151
4152 schedule_timeout_uninterruptible(HZ);
4153 }
4154 if (i == 30) {
4155 printk(KERN_ERR "cciss: controller seems dead\n");
4156 return -EBUSY;
82eb03cf
CC		 4157 }
4158 }
4159
1da177e4 4160 i = alloc_cciss_hba();
7c832835 4161 if (i < 0)
e2019b58 4162 return -1;
1f8ef380
MM		 4163
4164 hba[i]->busy_initializing = 1;
8a3173de
JA		 4165 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4166 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4167 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4168
1da177e4 4169 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 4170 goto clean0;
1da177e4
LT		 4171
4172 sprintf(hba[i]->devname, "cciss%d", i);
4173 hba[i]->ctlr = i;
4174 hba[i]->pdev = pdev;
4175
b368c9dd
AP		 4176 init_completion(&hba[i]->scan_wait);
4177
7fe06326
AP		 4178 if (cciss_create_hba_sysfs_entry(hba[i]))
4179 goto clean0;
4180
1da177e4 4181 /* configure PCI DMA stuff */
6a35528a 4182 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4183 dac = 1;
284901a9 4184 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4185 dac = 0;
1da177e4 4186 else {
40aabb58 4187 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4188 goto clean1;
4189 }
4190
4191 /*
4192 * register with the major number, or get a dynamic major number
4193 * by passing 0 as argument. This is done for greater than
4194 * 8 controller support.
4195 */
4196 if (i < MAX_CTLR_ORIG)
564de74a 4197 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4198 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4199 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4200 printk(KERN_ERR
7c832835
BH		 4201 "cciss: Unable to get major number %d for %s "
4202 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4203 goto clean1;
7c832835 4204 } else {
1da177e4
LT		 4205 if (i >= MAX_CTLR_ORIG)
4206 hba[i]->major = rc;
4207 }
4208
4209 /* make sure the board interrupts are off */
4210 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4211 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4212 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4213 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4214 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4215 goto clean2;
4216 }
40aabb58
BH		 4217
4218 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4219 hba[i]->devname, pdev->device, pci_name(pdev),
4220 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4221
4222 hba[i]->cmd_pool_bits =
061837bc
JL		 4223 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4224 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4225 hba[i]->cmd_pool = (CommandList_struct *)
4226 pci_alloc_consistent(hba[i]->pdev,
f880632f 4227 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4228 &(hba[i]->cmd_pool_dhandle));
4229 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4230 pci_alloc_consistent(hba[i]->pdev,
f880632f 4231 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4232 &(hba[i]->errinfo_pool_dhandle));
4233 if ((hba[i]->cmd_pool_bits == NULL)
4234 || (hba[i]->cmd_pool == NULL)
4235 || (hba[i]->errinfo_pool == NULL)) {
4236 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4237 goto clean4;
4238 }
1da177e4 4239 spin_lock_init(&hba[i]->lock);
1da177e4 4240
7c832835
BH		 4241 /* Initialize the pdev driver private data.
4242 have it point to hba[i]. */
1da177e4 4243 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4244 /* command and error info recs zeroed out before
4245 they are used */
4246 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4247 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4248 * sizeof(unsigned long));
1da177e4 4249
6ae5ce8e
MM		 4250 hba[i]->num_luns = 0;
4251 hba[i]->highest_lun = -1;
4252 for (j = 0; j < CISS_MAX_LUN; j++) {
4253 hba[i]->drv[j].raid_level = -1;
4254 hba[i]->drv[j].queue = NULL;
4255 hba[i]->gendisk[j] = NULL;
4256 }
1da177e4
LT		 4257
4258 cciss_scsi_setup(i);
4259
4260 /* Turn the interrupts on so we can service requests */
4261 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4262
22bece00
MM		 4263 /* Get the firmware version */
4264 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4265 if (inq_buff == NULL) {
4266 printk(KERN_ERR "cciss: out of memory\n");
4267 goto clean4;
4268 }
4269
4270 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4271 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4272 if (return_code == IO_OK) {
4273 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4274 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4275 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4276 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4277 } else { /* send command failed */
4278 printk(KERN_WARNING "cciss: unable to determine firmware"
4279 " version of controller\n");
4280 }
212a5026 4281 kfree(inq_buff);
22bece00 4282
1da177e4 4283 cciss_procinit(i);
92c4231a
MM		 4284
4285 hba[i]->cciss_max_sectors = 2048;
4286
2d11d993 4287 rebuild_lun_table(hba[i], 1, 0);
b368c9dd 4288 hba[i]->busy_initializing = 0;
e2019b58 4289 return 1;
1da177e4 4290
6ae5ce8e 4291clean4:
6044ec88 4292 kfree(hba[i]->cmd_pool_bits);
7c832835 4293 if (hba[i]->cmd_pool)
1da177e4 4294 pci_free_consistent(hba[i]->pdev,
f880632f 4295 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4296 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4297 if (hba[i]->errinfo_pool)
1da177e4 4298 pci_free_consistent(hba[i]->pdev,
f880632f 4299 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4300 hba[i]->errinfo_pool,
4301 hba[i]->errinfo_pool_dhandle);
fb86a35b 4302 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4303clean2:
1da177e4 4304 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4305clean1:
7fe06326
AP		 4306 cciss_destroy_hba_sysfs_entry(hba[i]);
4307clean0:
1f8ef380 4308 hba[i]->busy_initializing = 0;
799202cb
MM		 4309 /* cleanup any queues that may have been initialized */
4310 for (j=0; j <= hba[i]->highest_lun; j++){
4311 drive_info_struct *drv = &(hba[i]->drv[j]);
4312 if (drv->queue)
4313 blk_cleanup_queue(drv->queue);
4314 }
872225ca
MM		 4315 /*
4316 * Deliberately omit pci_disable_device(): it does something nasty to
4317 * Smart Array controllers that pci_enable_device does not undo
4318 */
799202cb 4319 pci_release_regions(pdev);
799202cb 4320 pci_set_drvdata(pdev, NULL);
61808c2b 4321 free_hba(i);
e2019b58 4322 return -1;
1da177e4
LT		 4323}
4324
e9ca75b5 4325static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4326{
4327 ctlr_info_t *tmp_ptr;
e9ca75b5 4328 int i;
1da177e4 4329 char flush_buf[4];
7c832835 4330 int return_code;
1da177e4 4331
e9ca75b5
GB		 4332 tmp_ptr = pci_get_drvdata(pdev);
4333 if (tmp_ptr == NULL)
4334 return;
4335 i = tmp_ptr->ctlr;
4336 if (hba[i] == NULL)
4337 return;
4338
4339 /* Turn board interrupts off and send the flush cache command */
4340 /* sendcmd will turn off interrupt, and send the flush...
4341 * To write all data in the battery backed cache to disks */
4342 memset(flush_buf, 0, 4);
b57695fe 4343 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4344 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4345 if (return_code == IO_OK) {
4346 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4347 } else {
4348 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4349 }
4350 free_irq(hba[i]->intr[2], hba[i]);
4351}
4352
4353static void __devexit cciss_remove_one(struct pci_dev *pdev)
4354{
4355 ctlr_info_t *tmp_ptr;
4356 int i, j;
4357
7c832835
BH		 4358 if (pci_get_drvdata(pdev) == NULL) {
4359 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4360 return;
4361 }
0a9279cc 4362
1da177e4
LT		 4363 tmp_ptr = pci_get_drvdata(pdev);
4364 i = tmp_ptr->ctlr;
7c832835 4365 if (hba[i] == NULL) {
1da177e4 4366 printk(KERN_ERR "cciss: device appears to "
7c832835 4367 "already be removed \n");
1da177e4
LT		 4368 return;
4369 }
b6550777 4370
b368c9dd 4371 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4372
b368c9dd 4373 remove_from_scan_list(hba[i]);
b6550777
BH		 4374 remove_proc_entry(hba[i]->devname, proc_cciss);
4375 unregister_blkdev(hba[i]->major, hba[i]->devname);
4376
4377 /* remove it from the disk list */
4378 for (j = 0; j < CISS_MAX_LUN; j++) {
4379 struct gendisk *disk = hba[i]->gendisk[j];
4380 if (disk) {
165125e1 4381 struct request_queue *q = disk->queue;
b6550777 4382
097d0264 4383 if (disk->flags & GENHD_FL_UP) {
8ce51966 4384 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4385 del_gendisk(disk);
097d0264 4386 }
b6550777
BH		 4387 if (q)
4388 blk_cleanup_queue(q);
4389 }
4390 }
4391
ba198efb 4392#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4393 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4394#endif
b6550777 4395
e9ca75b5 4396 cciss_shutdown(pdev);
fb86a35b
MM		 4397
4398#ifdef CONFIG_PCI_MSI
7c832835
BH		 4399 if (hba[i]->msix_vector)
4400 pci_disable_msix(hba[i]->pdev);
4401 else if (hba[i]->msi_vector)
4402 pci_disable_msi(hba[i]->pdev);
4403#endif /* CONFIG_PCI_MSI */
fb86a35b 4404
1da177e4 4405 iounmap(hba[i]->vaddr);
1da177e4 4406
f880632f 4407 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4408 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4409 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4410 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4411 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4412 /*
4413 * Deliberately omit pci_disable_device(): it does something nasty to
4414 * Smart Array controllers that pci_enable_device does not undo
4415 */
7c832835 4416 pci_release_regions(pdev);
4e570309 4417 pci_set_drvdata(pdev, NULL);
7fe06326 4418 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4419 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4420 free_hba(i);
7c832835 4421}
1da177e4
LT		 4422
4423static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4424 .name = "cciss",
4425 .probe = cciss_init_one,
4426 .remove = __devexit_p(cciss_remove_one),
4427 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4428 .shutdown = cciss_shutdown,
1da177e4
LT		 4429};
4430
4431/*
4432 * This is it. Register the PCI driver information for the cards we control
7c832835 4433 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4434 */
4435static int __init cciss_init(void)
4436{
7fe06326
AP		 4437 int err;
4438
10cbda97
JA		 4439 /*
4440 * The hardware requires that commands are aligned on a 64-bit
4441 * boundary. Given that we use pci_alloc_consistent() to allocate an
4442 * array of them, the size must be a multiple of 8 bytes.
4443 */
4444 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4445
1da177e4
LT		 4446 printk(KERN_INFO DRIVER_NAME "\n");
4447
7fe06326
AP		 4448 err = bus_register(&cciss_bus_type);
4449 if (err)
4450 return err;
4451
b368c9dd
AP		 4452 /* Start the scan thread */
4453 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4454 if (IS_ERR(cciss_scan_thread)) {
4455 err = PTR_ERR(cciss_scan_thread);
4456 goto err_bus_unregister;
4457 }
4458
1da177e4 4459 /* Register for our PCI devices */
7fe06326
AP		 4460 err = pci_register_driver(&cciss_pci_driver);
4461 if (err)
b368c9dd 4462 goto err_thread_stop;
7fe06326 4463
617e1344 4464 return err;
7fe06326 4465
b368c9dd
AP		 4466err_thread_stop:
4467 kthread_stop(cciss_scan_thread);
4468err_bus_unregister:
7fe06326 4469 bus_unregister(&cciss_bus_type);
b368c9dd 4470
7fe06326 4471 return err;
1da177e4
LT		 4472}
4473
4474static void __exit cciss_cleanup(void)
4475{
4476 int i;
4477
4478 pci_unregister_driver(&cciss_pci_driver);
4479 /* double check that all controller entrys have been removed */
7c832835
BH		 4480 for (i = 0; i < MAX_CTLR; i++) {
4481 if (hba[i] != NULL) {
1da177e4 4482 printk(KERN_WARNING "cciss: had to remove"
7c832835 4483 " controller %d\n", i);
1da177e4
LT		 4484 cciss_remove_one(hba[i]->pdev);
4485 }
4486 }
b368c9dd 4487 kthread_stop(cciss_scan_thread);
928b4d8c 4488 remove_proc_entry("driver/cciss", NULL);
7fe06326 4489 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4490}
4491
33079b21
MM		 4492static void fail_all_cmds(unsigned long ctlr)
4493{
4494 /* If we get here, the board is apparently dead. */
4495 ctlr_info_t *h = hba[ctlr];
4496 CommandList_struct *c;
4497 unsigned long flags;
4498
4499 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4500 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4501
4502 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4503
7c832835 4504 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4505
4506 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4507 while (!hlist_empty(&h->reqQ)) {
4508 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4509 removeQ(c);
33079b21 4510 h->Qdepth--;
8a3173de 4511 addQ(&h->cmpQ, c);
33079b21
MM		 4512 }
4513
4514 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4515 while (!hlist_empty(&h->cmpQ)) {
4516 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4517 removeQ(c);
b59e64d0
HR		 4518 if (c->cmd_type != CMD_MSG_STALE)
4519 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4520 if (c->cmd_type == CMD_RWREQ) {
4521 complete_command(h, c, 0);
4522 } else if (c->cmd_type == CMD_IOCTL_PEND)
4523 complete(c->waiting);
4524#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4525 else if (c->cmd_type == CMD_SCSI)
4526 complete_scsi_command(c, 0, 0);
33079b21
MM		 4527#endif
4528 }
4529 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4530 return;
4531}
4532
1da177e4
LT		 4533module_init(cciss_init);
4534module_exit(cciss_cleanup);
Linux kernel - Deliverables
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