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cciss: Dynamically allocate the drive_info_struct for each logical drive.
[net-next-2.6.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1da177e4
LT		 44#include <asm/uaccess.h>
45#include <asm/io.h>
46
eb0df996 47#include <linux/dma-mapping.h>
1da177e4
LT		 48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/completion.h>
d5d3b736 51#include <scsi/scsi.h>
03bbfee5
MMOD		 52#include <scsi/sg.h>
53#include <scsi/scsi_ioctl.h>
54#include <linux/cdrom.h>
231bc2a2 55#include <linux/scatterlist.h>
0a9279cc 56#include <linux/kthread.h>
1da177e4
LT		 57
58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 61
62/* Embedded module documentation macros - see modules.h */
63MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68MODULE_VERSION("3.6.20");
1da177e4
LT		 69MODULE_LICENSE("GPL");
70
71#include "cciss_cmd.h"
72#include "cciss.h"
73#include <linux/cciss_ioctl.h>
74
75/* define the PCI info for the cards we can control */
76static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 104 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
105 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 106 {0,}
107};
7c832835 108
1da177e4
LT		 109MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
110
1da177e4
LT		 111/* board_id = Subsystem Device ID & Vendor ID
112 * product = Marketing Name for the board
7c832835 113 * access = Address of the struct of function pointers
1da177e4
LT		 114 */
115static struct board_type products[] = {
49153998
MM		 116 {0x40700E11, "Smart Array 5300", &SA5_access},
117 {0x40800E11, "Smart Array 5i", &SA5B_access},
118 {0x40820E11, "Smart Array 532", &SA5B_access},
119 {0x40830E11, "Smart Array 5312", &SA5B_access},
120 {0x409A0E11, "Smart Array 641", &SA5_access},
121 {0x409B0E11, "Smart Array 642", &SA5_access},
122 {0x409C0E11, "Smart Array 6400", &SA5_access},
123 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
124 {0x40910E11, "Smart Array 6i", &SA5_access},
125 {0x3225103C, "Smart Array P600", &SA5_access},
126 {0x3223103C, "Smart Array P800", &SA5_access},
127 {0x3234103C, "Smart Array P400", &SA5_access},
128 {0x3235103C, "Smart Array P400i", &SA5_access},
129 {0x3211103C, "Smart Array E200i", &SA5_access},
130 {0x3212103C, "Smart Array E200", &SA5_access},
131 {0x3213103C, "Smart Array E200i", &SA5_access},
132 {0x3214103C, "Smart Array E200i", &SA5_access},
133 {0x3215103C, "Smart Array E200i", &SA5_access},
134 {0x3237103C, "Smart Array E500", &SA5_access},
135 {0x323D103C, "Smart Array P700m", &SA5_access},
136 {0x3241103C, "Smart Array P212", &SA5_access},
137 {0x3243103C, "Smart Array P410", &SA5_access},
138 {0x3245103C, "Smart Array P410i", &SA5_access},
139 {0x3247103C, "Smart Array P411", &SA5_access},
140 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 141 {0x324A103C, "Smart Array P712m", &SA5_access},
142 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 143 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 144};
145
d14c4ab5 146/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 147#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 148#define MAX_IOCTL_CONFIG_WAIT 1000
149
150/*define how many times we will try a command because of bus resets */
151#define MAX_CMD_RETRIES 3
152
1da177e4
LT		 153#define MAX_CTLR 32
154
155/* Originally cciss driver only supports 8 major numbers */
156#define MAX_CTLR_ORIG 8
157
1da177e4
LT		 158static ctlr_info_t *hba[MAX_CTLR];
159
b368c9dd
AP		 160static struct task_struct *cciss_scan_thread;
161static DEFINE_MUTEX(scan_mutex);
162static LIST_HEAD(scan_q);
163
165125e1 164static void do_cciss_request(struct request_queue *q);
7d12e780 165static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 166static int cciss_open(struct block_device *bdev, fmode_t mode);
167static int cciss_release(struct gendisk *disk, fmode_t mode);
168static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 169 unsigned int cmd, unsigned long arg);
a885c8c4 170static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 171
1da177e4 172static int cciss_revalidate(struct gendisk *disk);
2d11d993 173static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 174static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 175 int clear_all, int via_ioctl);
1da177e4 176
00988a35
MMOD		 177static void cciss_read_capacity(int ctlr, int logvol, int withirq,
178 sector_t *total_size, unsigned int *block_size);
179static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
180 sector_t *total_size, unsigned int *block_size);
181static void cciss_geometry_inquiry(int ctlr, int logvol,
182 int withirq, sector_t total_size,
183 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 184 drive_info_struct *drv);
7c832835
BH		 185static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
186 __u32);
187static void start_io(ctlr_info_t *h);
188static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
7c832835
BH		 189 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
190static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 191 __u8 page_code, unsigned char scsi3addr[],
192 int cmd_type);
85cc61ae 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
194 int attempt_retry);
195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 196
33079b21 197static void fail_all_cmds(unsigned long ctlr);
d6f4965d 198static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 199static int scan_thread(void *data);
200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 201static void cciss_hba_release(struct device *dev);
202static void cciss_device_release(struct device *dev);
361e9b07 203static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
9cef0d2f 204static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
33079b21 205
1da177e4 206#ifdef CONFIG_PROC_FS
1da177e4
LT		 207static void cciss_procinit(int i);
208#else
7c832835
BH		 209static void cciss_procinit(int i)
210{
211}
212#endif /* CONFIG_PROC_FS */
1da177e4
LT		 213
214#ifdef CONFIG_COMPAT
ef7822c2
AV		 215static int cciss_compat_ioctl(struct block_device *, fmode_t,
216 unsigned, unsigned long);
1da177e4
LT		 217#endif
218
83d5cde4 219static const struct block_device_operations cciss_fops = {
7c832835 220 .owner = THIS_MODULE,
ef7822c2
AV		 221 .open = cciss_open,
222 .release = cciss_release,
223 .locked_ioctl = cciss_ioctl,
7c832835 224 .getgeo = cciss_getgeo,
1da177e4 225#ifdef CONFIG_COMPAT
ef7822c2 226 .compat_ioctl = cciss_compat_ioctl,
1da177e4 227#endif
7c832835 228 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 229};
230
231/*
232 * Enqueuing and dequeuing functions for cmdlists.
233 */
8a3173de 234static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 235{
8a3173de 236 hlist_add_head(&c->list, list);
1da177e4
LT		 237}
238
8a3173de 239static inline void removeQ(CommandList_struct *c)
1da177e4 240{
b59e64d0
HR		 241 /*
242 * After kexec/dump some commands might still
243 * be in flight, which the firmware will try
244 * to complete. Resetting the firmware doesn't work
245 * with old fw revisions, so we have to mark
246 * them off as 'stale' to prevent the driver from
247 * falling over.
248 */
249 if (WARN_ON(hlist_unhashed(&c->list))) {
250 c->cmd_type = CMD_MSG_STALE;
8a3173de 251 return;
b59e64d0 252 }
8a3173de
JA		 253
254 hlist_del_init(&c->list);
1da177e4
LT		 255}
256
257#include "cciss_scsi.c" /* For SCSI tape support */
258
259#ifdef CONFIG_PROC_FS
260
261/*
262 * Report information about this controller.
263 */
264#define ENG_GIG 1000000000
265#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 266#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 267static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
268 "UNKNOWN"
269};
fa52bec9 270#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
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;
9cef0d2f 331 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM		 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
fa52bec9 344 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 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)
9cef0d2f 465#define to_drv(n) container_of(n, drive_info_struct, dev)
7fe06326 466
d6f4965d
AP		 467static ssize_t host_store_rescan(struct device *dev,
468 struct device_attribute *attr,
469 const char *buf, size_t count)
470{
471 struct ctlr_info *h = to_hba(dev);
472
473 add_to_scan_list(h);
474 wake_up_process(cciss_scan_thread);
475 wait_for_completion_interruptible(&h->scan_wait);
476
477 return count;
478}
479DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 480
481static ssize_t dev_show_unique_id(struct device *dev,
482 struct device_attribute *attr,
483 char *buf)
484{
9cef0d2f
SC		 485 drive_info_struct *drv = to_drv(dev);
486 struct ctlr_info *h = to_hba(drv->dev.parent);
7fe06326
AP		 487 __u8 sn[16];
488 unsigned long flags;
489 int ret = 0;
490
491 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
492 if (h->busy_configuring)
493 ret = -EBUSY;
494 else
495 memcpy(sn, drv->serial_no, sizeof(sn));
496 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
497
498 if (ret)
499 return ret;
500 else
501 return snprintf(buf, 16 * 2 + 2,
502 "%02X%02X%02X%02X%02X%02X%02X%02X"
503 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
504 sn[0], sn[1], sn[2], sn[3],
505 sn[4], sn[5], sn[6], sn[7],
506 sn[8], sn[9], sn[10], sn[11],
507 sn[12], sn[13], sn[14], sn[15]);
508}
509DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
510
511static ssize_t dev_show_vendor(struct device *dev,
512 struct device_attribute *attr,
513 char *buf)
514{
9cef0d2f
SC		 515 drive_info_struct *drv = to_drv(dev);
516 struct ctlr_info *h = to_hba(drv->dev.parent);
7fe06326
AP		 517 char vendor[VENDOR_LEN + 1];
518 unsigned long flags;
519 int ret = 0;
520
521 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
522 if (h->busy_configuring)
523 ret = -EBUSY;
524 else
525 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
526 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
527
528 if (ret)
529 return ret;
530 else
531 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
532}
533DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
534
535static ssize_t dev_show_model(struct device *dev,
536 struct device_attribute *attr,
537 char *buf)
538{
9cef0d2f
SC		 539 drive_info_struct *drv = to_drv(dev);
540 struct ctlr_info *h = to_hba(drv->dev.parent);
7fe06326
AP		 541 char model[MODEL_LEN + 1];
542 unsigned long flags;
543 int ret = 0;
544
545 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
546 if (h->busy_configuring)
547 ret = -EBUSY;
548 else
549 memcpy(model, drv->model, MODEL_LEN + 1);
550 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
551
552 if (ret)
553 return ret;
554 else
555 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
556}
557DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
558
559static ssize_t dev_show_rev(struct device *dev,
560 struct device_attribute *attr,
561 char *buf)
562{
9cef0d2f
SC		 563 drive_info_struct *drv = to_drv(dev);
564 struct ctlr_info *h = to_hba(drv->dev.parent);
7fe06326
AP		 565 char rev[REV_LEN + 1];
566 unsigned long flags;
567 int ret = 0;
568
569 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
570 if (h->busy_configuring)
571 ret = -EBUSY;
572 else
573 memcpy(rev, drv->rev, REV_LEN + 1);
574 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
575
576 if (ret)
577 return ret;
578 else
579 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
580}
581DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
582
ce84a8ae
SC		 583static ssize_t cciss_show_lunid(struct device *dev,
584 struct device_attribute *attr, char *buf)
585{
9cef0d2f
SC		 586 drive_info_struct *drv = to_drv(dev);
587 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC		 588 unsigned long flags;
589 unsigned char lunid[8];
590
591 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
592 if (h->busy_configuring) {
593 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
594 return -EBUSY;
595 }
596 if (!drv->heads) {
597 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
598 return -ENOTTY;
599 }
600 memcpy(lunid, drv->LunID, sizeof(lunid));
601 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
602 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
603 lunid[0], lunid[1], lunid[2], lunid[3],
604 lunid[4], lunid[5], lunid[6], lunid[7]);
605}
606DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
607
3ff1111d
SC		 608static ssize_t cciss_show_raid_level(struct device *dev,
609 struct device_attribute *attr, char *buf)
610{
9cef0d2f
SC		 611 drive_info_struct *drv = to_drv(dev);
612 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC		 613 int raid;
614 unsigned long flags;
615
616 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
617 if (h->busy_configuring) {
618 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
619 return -EBUSY;
620 }
621 raid = drv->raid_level;
622 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
623 if (raid < 0 || raid > RAID_UNKNOWN)
624 raid = RAID_UNKNOWN;
625
626 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
627 raid_label[raid]);
628}
629DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
630
e272afec
SC		 631static ssize_t cciss_show_usage_count(struct device *dev,
632 struct device_attribute *attr, char *buf)
633{
9cef0d2f
SC		 634 drive_info_struct *drv = to_drv(dev);
635 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC		 636 unsigned long flags;
637 int count;
638
639 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
640 if (h->busy_configuring) {
641 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
642 return -EBUSY;
643 }
644 count = drv->usage_count;
645 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
646 return snprintf(buf, 20, "%d\n", count);
647}
648DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
649
d6f4965d
AP		 650static struct attribute *cciss_host_attrs[] = {
651 &dev_attr_rescan.attr,
652 NULL
653};
654
655static struct attribute_group cciss_host_attr_group = {
656 .attrs = cciss_host_attrs,
657};
658
659static struct attribute_group *cciss_host_attr_groups[] = {
660 &cciss_host_attr_group,
661 NULL
662};
663
664static struct device_type cciss_host_type = {
665 .name = "cciss_host",
666 .groups = cciss_host_attr_groups,
617e1344 667 .release = cciss_hba_release,
d6f4965d
AP		 668};
669
7fe06326
AP		 670static struct attribute *cciss_dev_attrs[] = {
671 &dev_attr_unique_id.attr,
672 &dev_attr_model.attr,
673 &dev_attr_vendor.attr,
674 &dev_attr_rev.attr,
ce84a8ae 675 &dev_attr_lunid.attr,
3ff1111d 676 &dev_attr_raid_level.attr,
e272afec 677 &dev_attr_usage_count.attr,
7fe06326
AP		 678 NULL
679};
680
681static struct attribute_group cciss_dev_attr_group = {
682 .attrs = cciss_dev_attrs,
683};
684
a4dbd674 685static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 686 &cciss_dev_attr_group,
687 NULL
688};
689
690static struct device_type cciss_dev_type = {
691 .name = "cciss_device",
692 .groups = cciss_dev_attr_groups,
617e1344 693 .release = cciss_device_release,
7fe06326
AP		 694};
695
696static struct bus_type cciss_bus_type = {
697 .name = "cciss",
698};
699
617e1344
SC		 700/*
701 * cciss_hba_release is called when the reference count
702 * of h->dev goes to zero.
703 */
704static void cciss_hba_release(struct device *dev)
705{
706 /*
707 * nothing to do, but need this to avoid a warning
708 * about not having a release handler from lib/kref.c.
709 */
710}
7fe06326
AP		 711
712/*
713 * Initialize sysfs entry for each controller. This sets up and registers
714 * the 'cciss#' directory for each individual controller under
715 * /sys/bus/pci/devices/<dev>/.
716 */
717static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
718{
719 device_initialize(&h->dev);
720 h->dev.type = &cciss_host_type;
721 h->dev.bus = &cciss_bus_type;
722 dev_set_name(&h->dev, "%s", h->devname);
723 h->dev.parent = &h->pdev->dev;
724
725 return device_add(&h->dev);
726}
727
728/*
729 * Remove sysfs entries for an hba.
730 */
731static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
732{
733 device_del(&h->dev);
617e1344
SC		 734 put_device(&h->dev); /* final put. */
735}
736
737/* cciss_device_release is called when the reference count
9cef0d2f 738 * of h->drv[x]dev goes to zero.
617e1344
SC		 739 */
740static void cciss_device_release(struct device *dev)
741{
9cef0d2f
SC		 742 drive_info_struct *drv = to_drv(dev);
743 kfree(drv);
7fe06326
AP		 744}
745
746/*
747 * Initialize sysfs for each logical drive. This sets up and registers
748 * the 'c#d#' directory for each individual logical drive under
749 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
750 * /sys/block/cciss!c#d# to this entry.
751 */
617e1344 752static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 753 int drv_index)
754{
617e1344
SC		 755 struct device *dev;
756
9cef0d2f 757 if (h->drv[drv_index]->device_initialized)
8ce51966
SC		 758 return 0;
759
9cef0d2f 760 dev = &h->drv[drv_index]->dev;
617e1344
SC		 761 device_initialize(dev);
762 dev->type = &cciss_dev_type;
763 dev->bus = &cciss_bus_type;
764 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
765 dev->parent = &h->dev;
9cef0d2f 766 h->drv[drv_index]->device_initialized = 1;
617e1344 767 return device_add(dev);
7fe06326
AP		 768}
769
770/*
771 * Remove sysfs entries for a logical drive.
772 */
8ce51966
SC		 773static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
774 int ctlr_exiting)
7fe06326 775{
9cef0d2f 776 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC		 777
778 /* special case for c*d0, we only destroy it on controller exit */
779 if (drv_index == 0 && !ctlr_exiting)
780 return;
781
617e1344
SC		 782 device_del(dev);
783 put_device(dev); /* the "final" put. */
9cef0d2f 784 h->drv[drv_index] = NULL;
7fe06326
AP		 785}
786
7c832835
BH		 787/*
788 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 789 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 790 * which ones are free or in use. For operations that can wait for kmalloc
791 * to possible sleep, this routine can be called with get_from_pool set to 0.
792 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
793 */
794static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 795{
796 CommandList_struct *c;
7c832835 797 int i;
1da177e4
LT		 798 u64bit temp64;
799 dma_addr_t cmd_dma_handle, err_dma_handle;
800
7c832835
BH		 801 if (!get_from_pool) {
802 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
803 sizeof(CommandList_struct), &cmd_dma_handle);
804 if (c == NULL)
805 return NULL;
1da177e4
LT		 806 memset(c, 0, sizeof(CommandList_struct));
807
33079b21
MM		 808 c->cmdindex = -1;
809
7c832835
BH		 810 c->err_info = (ErrorInfo_struct *)
811 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
812 &err_dma_handle);
813
814 if (c->err_info == NULL) {
815 pci_free_consistent(h->pdev,
1da177e4
LT		 816 sizeof(CommandList_struct), c, cmd_dma_handle);
817 return NULL;
818 }
819 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 820 } else { /* get it out of the controllers pool */
821
822 do {
f880632f
MM		 823 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
824 if (i == h->nr_cmds)
7c832835
BH		 825 return NULL;
826 } while (test_and_set_bit
827 (i & (BITS_PER_LONG - 1),
828 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 829#ifdef CCISS_DEBUG
830 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
831#endif
7c832835 832 c = h->cmd_pool + i;
1da177e4 833 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 834 cmd_dma_handle = h->cmd_pool_dhandle
835 + i * sizeof(CommandList_struct);
1da177e4
LT		 836 c->err_info = h->errinfo_pool + i;
837 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 838 err_dma_handle = h->errinfo_pool_dhandle
839 + i * sizeof(ErrorInfo_struct);
840 h->nr_allocs++;
33079b21
MM		 841
842 c->cmdindex = i;
7c832835 843 }
1da177e4 844
8a3173de 845 INIT_HLIST_NODE(&c->list);
1da177e4 846 c->busaddr = (__u32) cmd_dma_handle;
7c832835 847 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 848 c->ErrDesc.Addr.lower = temp64.val32.lower;
849 c->ErrDesc.Addr.upper = temp64.val32.upper;
850 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 851
7c832835
BH		 852 c->ctlr = h->ctlr;
853 return c;
1da177e4
LT		 854}
855
7c832835
BH		 856/*
857 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 858 */
859static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
860{
861 int i;
862 u64bit temp64;
863
7c832835 864 if (!got_from_pool) {
1da177e4
LT		 865 temp64.val32.lower = c->ErrDesc.Addr.lower;
866 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 867 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
868 c->err_info, (dma_addr_t) temp64.val);
869 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
870 c, (dma_addr_t) c->busaddr);
871 } else {
1da177e4 872 i = c - h->cmd_pool;
7c832835
BH		 873 clear_bit(i & (BITS_PER_LONG - 1),
874 h->cmd_pool_bits + (i / BITS_PER_LONG));
875 h->nr_frees++;
876 }
1da177e4
LT		 877}
878
879static inline ctlr_info_t *get_host(struct gendisk *disk)
880{
7c832835 881 return disk->queue->queuedata;
1da177e4
LT		 882}
883
884static inline drive_info_struct *get_drv(struct gendisk *disk)
885{
886 return disk->private_data;
887}
888
889/*
890 * Open. Make sure the device is really there.
891 */
ef7822c2 892static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 893{
ef7822c2
AV		 894 ctlr_info_t *host = get_host(bdev->bd_disk);
895 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 896
897#ifdef CCISS_DEBUG
ef7822c2 898 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 899#endif /* CCISS_DEBUG */
1da177e4 900
2e043986 901 if (drv->busy_configuring)
ddd47442 902 return -EBUSY;
1da177e4
LT		 903 /*
904 * Root is allowed to open raw volume zero even if it's not configured
905 * so array config can still work. Root is also allowed to open any
906 * volume that has a LUN ID, so it can issue IOCTL to reread the
907 * disk information. I don't think I really like this
908 * but I'm already using way to many device nodes to claim another one
909 * for "raw controller".
910 */
7a06f789 911 if (drv->heads == 0) {
ef7822c2 912 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 913 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 914 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 915 return -ENXIO;
1da177e4 916 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 917 } else if (memcmp(drv->LunID, CTLR_LUNID,
918 sizeof(drv->LunID))) {
1da177e4
LT		 919 return -ENXIO;
920 }
921 }
922 if (!capable(CAP_SYS_ADMIN))
923 return -EPERM;
924 }
925 drv->usage_count++;
926 host->usage_count++;
927 return 0;
928}
7c832835 929
1da177e4
LT		 930/*
931 * Close. Sync first.
932 */
ef7822c2 933static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 934{
ef7822c2
AV		 935 ctlr_info_t *host = get_host(disk);
936 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 937
938#ifdef CCISS_DEBUG
ef7822c2 939 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 940#endif /* CCISS_DEBUG */
1da177e4
LT		 941
942 drv->usage_count--;
943 host->usage_count--;
944 return 0;
945}
946
947#ifdef CONFIG_COMPAT
948
ef7822c2
AV		 949static int do_ioctl(struct block_device *bdev, fmode_t mode,
950 unsigned cmd, unsigned long arg)
1da177e4
LT		 951{
952 int ret;
953 lock_kernel();
ef7822c2 954 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 955 unlock_kernel();
956 return ret;
957}
958
ef7822c2
AV		 959static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
960 unsigned cmd, unsigned long arg);
961static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
962 unsigned cmd, unsigned long arg);
1da177e4 963
ef7822c2
AV		 964static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
965 unsigned cmd, unsigned long arg)
1da177e4
LT		 966{
967 switch (cmd) {
968 case CCISS_GETPCIINFO:
969 case CCISS_GETINTINFO:
970 case CCISS_SETINTINFO:
971 case CCISS_GETNODENAME:
972 case CCISS_SETNODENAME:
973 case CCISS_GETHEARTBEAT:
974 case CCISS_GETBUSTYPES:
975 case CCISS_GETFIRMVER:
976 case CCISS_GETDRIVVER:
977 case CCISS_REVALIDVOLS:
978 case CCISS_DEREGDISK:
979 case CCISS_REGNEWDISK:
980 case CCISS_REGNEWD:
981 case CCISS_RESCANDISK:
982 case CCISS_GETLUNINFO:
ef7822c2 983 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 984
985 case CCISS_PASSTHRU32:
ef7822c2 986 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 987 case CCISS_BIG_PASSTHRU32:
ef7822c2 988 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 989
990 default:
991 return -ENOIOCTLCMD;
992 }
993}
994
ef7822c2
AV		 995static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
996 unsigned cmd, unsigned long arg)
1da177e4
LT		 997{
998 IOCTL32_Command_struct __user *arg32 =
7c832835 999 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1000 IOCTL_Command_struct arg64;
1001 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1002 int err;
1003 u32 cp;
1004
1005 err = 0;
7c832835
BH		 1006 err |=
1007 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1008 sizeof(arg64.LUN_info));
1009 err |=
1010 copy_from_user(&arg64.Request, &arg32->Request,
1011 sizeof(arg64.Request));
1012 err |=
1013 copy_from_user(&arg64.error_info, &arg32->error_info,
1014 sizeof(arg64.error_info));
1da177e4
LT		 1015 err |= get_user(arg64.buf_size, &arg32->buf_size);
1016 err |= get_user(cp, &arg32->buf);
1017 arg64.buf = compat_ptr(cp);
1018 err |= copy_to_user(p, &arg64, sizeof(arg64));
1019
1020 if (err)
1021 return -EFAULT;
1022
ef7822c2 1023 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1024 if (err)
1025 return err;
7c832835
BH		 1026 err |=
1027 copy_in_user(&arg32->error_info, &p->error_info,
1028 sizeof(arg32->error_info));
1da177e4
LT		 1029 if (err)
1030 return -EFAULT;
1031 return err;
1032}
1033
ef7822c2
AV		 1034static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1035 unsigned cmd, unsigned long arg)
1da177e4
LT		 1036{
1037 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1038 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1039 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1040 BIG_IOCTL_Command_struct __user *p =
1041 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1042 int err;
1043 u32 cp;
1044
1045 err = 0;
7c832835
BH		 1046 err |=
1047 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1048 sizeof(arg64.LUN_info));
1049 err |=
1050 copy_from_user(&arg64.Request, &arg32->Request,
1051 sizeof(arg64.Request));
1052 err |=
1053 copy_from_user(&arg64.error_info, &arg32->error_info,
1054 sizeof(arg64.error_info));
1da177e4
LT		 1055 err |= get_user(arg64.buf_size, &arg32->buf_size);
1056 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1057 err |= get_user(cp, &arg32->buf);
1058 arg64.buf = compat_ptr(cp);
1059 err |= copy_to_user(p, &arg64, sizeof(arg64));
1060
1061 if (err)
7c832835 1062 return -EFAULT;
1da177e4 1063
ef7822c2 1064 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1065 if (err)
1066 return err;
7c832835
BH		 1067 err |=
1068 copy_in_user(&arg32->error_info, &p->error_info,
1069 sizeof(arg32->error_info));
1da177e4
LT		 1070 if (err)
1071 return -EFAULT;
1072 return err;
1073}
1074#endif
a885c8c4
CH		 1075
1076static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1077{
1078 drive_info_struct *drv = get_drv(bdev->bd_disk);
1079
1080 if (!drv->cylinders)
1081 return -ENXIO;
1082
1083 geo->heads = drv->heads;
1084 geo->sectors = drv->sectors;
1085 geo->cylinders = drv->cylinders;
1086 return 0;
1087}
1088
0a9279cc
MM		 1089static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1090{
1091 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1092 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1093 (void)check_for_unit_attention(host, c);
1094}
1da177e4 1095/*
7c832835 1096 * ioctl
1da177e4 1097 */
ef7822c2 1098static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1099 unsigned int cmd, unsigned long arg)
1da177e4 1100{
1da177e4
LT		 1101 struct gendisk *disk = bdev->bd_disk;
1102 ctlr_info_t *host = get_host(disk);
1103 drive_info_struct *drv = get_drv(disk);
1104 int ctlr = host->ctlr;
1105 void __user *argp = (void __user *)arg;
1106
1107#ifdef CCISS_DEBUG
1108 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1109#endif /* CCISS_DEBUG */
1110
1111 switch (cmd) {
1da177e4 1112 case CCISS_GETPCIINFO:
7c832835
BH		 1113 {
1114 cciss_pci_info_struct pciinfo;
1115
1116 if (!arg)
1117 return -EINVAL;
1118 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1119 pciinfo.bus = host->pdev->bus->number;
1120 pciinfo.dev_fn = host->pdev->devfn;
1121 pciinfo.board_id = host->board_id;
1122 if (copy_to_user
1123 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1124 return -EFAULT;
1125 return 0;
1126 }
1da177e4 1127 case CCISS_GETINTINFO:
7c832835
BH		 1128 {
1129 cciss_coalint_struct intinfo;
1130 if (!arg)
1131 return -EINVAL;
1132 intinfo.delay =
1133 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1134 intinfo.count =
1135 readl(&host->cfgtable->HostWrite.CoalIntCount);
1136 if (copy_to_user
1137 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1138 return -EFAULT;
1139 return 0;
1140 }
1da177e4 1141 case CCISS_SETINTINFO:
1da177e4 1142 {
7c832835
BH		 1143 cciss_coalint_struct intinfo;
1144 unsigned long flags;
1145 int i;
1146
1147 if (!arg)
1148 return -EINVAL;
1149 if (!capable(CAP_SYS_ADMIN))
1150 return -EPERM;
1151 if (copy_from_user
1152 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1153 return -EFAULT;
1154 if ((intinfo.delay == 0) && (intinfo.count == 0))
1155 {
1156// printk("cciss_ioctl: delay and count cannot be 0\n");
1157 return -EINVAL;
1158 }
1159 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1160 /* Update the field, and then ring the doorbell */
1161 writel(intinfo.delay,
1162 &(host->cfgtable->HostWrite.CoalIntDelay));
1163 writel(intinfo.count,
1164 &(host->cfgtable->HostWrite.CoalIntCount));
1165 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1166
1167 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1168 if (!(readl(host->vaddr + SA5_DOORBELL)
1169 & CFGTBL_ChangeReq))
1170 break;
1171 /* delay and try again */
1172 udelay(1000);
1173 }
1174 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1175 if (i >= MAX_IOCTL_CONFIG_WAIT)
1176 return -EAGAIN;
1177 return 0;
1da177e4 1178 }
1da177e4 1179 case CCISS_GETNODENAME:
7c832835
BH		 1180 {
1181 NodeName_type NodeName;
1182 int i;
1183
1184 if (!arg)
1185 return -EINVAL;
1186 for (i = 0; i < 16; i++)
1187 NodeName[i] =
1188 readb(&host->cfgtable->ServerName[i]);
1189 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1190 return -EFAULT;
1191 return 0;
1192 }
1da177e4 1193 case CCISS_SETNODENAME:
7c832835
BH		 1194 {
1195 NodeName_type NodeName;
1196 unsigned long flags;
1197 int i;
1198
1199 if (!arg)
1200 return -EINVAL;
1201 if (!capable(CAP_SYS_ADMIN))
1202 return -EPERM;
1203
1204 if (copy_from_user
1205 (NodeName, argp, sizeof(NodeName_type)))
1206 return -EFAULT;
1207
1208 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1209
1210 /* Update the field, and then ring the doorbell */
1211 for (i = 0; i < 16; i++)
1212 writeb(NodeName[i],
1213 &host->cfgtable->ServerName[i]);
1214
1215 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1216
1217 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1218 if (!(readl(host->vaddr + SA5_DOORBELL)
1219 & CFGTBL_ChangeReq))
1220 break;
1221 /* delay and try again */
1222 udelay(1000);
1223 }
1224 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1225 if (i >= MAX_IOCTL_CONFIG_WAIT)
1226 return -EAGAIN;
1227 return 0;
1228 }
1da177e4
LT		 1229
1230 case CCISS_GETHEARTBEAT:
7c832835
BH		 1231 {
1232 Heartbeat_type heartbeat;
1233
1234 if (!arg)
1235 return -EINVAL;
1236 heartbeat = readl(&host->cfgtable->HeartBeat);
1237 if (copy_to_user
1238 (argp, &heartbeat, sizeof(Heartbeat_type)))
1239 return -EFAULT;
1240 return 0;
1241 }
1da177e4 1242 case CCISS_GETBUSTYPES:
7c832835
BH		 1243 {
1244 BusTypes_type BusTypes;
1245
1246 if (!arg)
1247 return -EINVAL;
1248 BusTypes = readl(&host->cfgtable->BusTypes);
1249 if (copy_to_user
1250 (argp, &BusTypes, sizeof(BusTypes_type)))
1251 return -EFAULT;
1252 return 0;
1253 }
1da177e4 1254 case CCISS_GETFIRMVER:
7c832835
BH		 1255 {
1256 FirmwareVer_type firmware;
1da177e4 1257
7c832835
BH		 1258 if (!arg)
1259 return -EINVAL;
1260 memcpy(firmware, host->firm_ver, 4);
1da177e4 1261
7c832835
BH		 1262 if (copy_to_user
1263 (argp, firmware, sizeof(FirmwareVer_type)))
1264 return -EFAULT;
1265 return 0;
1266 }
1267 case CCISS_GETDRIVVER:
1268 {
1269 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1270
7c832835
BH		 1271 if (!arg)
1272 return -EINVAL;
1da177e4 1273
7c832835
BH		 1274 if (copy_to_user
1275 (argp, &DriverVer, sizeof(DriverVer_type)))
1276 return -EFAULT;
1277 return 0;
1278 }
1da177e4 1279
6ae5ce8e
MM		 1280 case CCISS_DEREGDISK:
1281 case CCISS_REGNEWD:
1da177e4 1282 case CCISS_REVALIDVOLS:
2d11d993 1283 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1284
1285 case CCISS_GETLUNINFO:{
1286 LogvolInfo_struct luninfo;
1287
39ccf9a6
SC		 1288 memcpy(&luninfo.LunID, drv->LunID,
1289 sizeof(luninfo.LunID));
7c832835
BH		 1290 luninfo.num_opens = drv->usage_count;
1291 luninfo.num_parts = 0;
1292 if (copy_to_user(argp, &luninfo,
1293 sizeof(LogvolInfo_struct)))
1294 return -EFAULT;
1295 return 0;
1296 }
1da177e4 1297 case CCISS_PASSTHRU:
1da177e4 1298 {
7c832835
BH		 1299 IOCTL_Command_struct iocommand;
1300 CommandList_struct *c;
1301 char *buff = NULL;
1302 u64bit temp64;
1303 unsigned long flags;
6e9a4738 1304 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1305
7c832835
BH		 1306 if (!arg)
1307 return -EINVAL;
1da177e4 1308
7c832835
BH		 1309 if (!capable(CAP_SYS_RAWIO))
1310 return -EPERM;
1da177e4 1311
7c832835
BH		 1312 if (copy_from_user
1313 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1314 return -EFAULT;
1315 if ((iocommand.buf_size < 1) &&
1316 (iocommand.Request.Type.Direction != XFER_NONE)) {
1317 return -EINVAL;
1318 }
1319#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1320 /* Check kmalloc limits */
1321 if (iocommand.buf_size > 128000)
1322 return -EINVAL;
1323#endif
1324 if (iocommand.buf_size > 0) {
1325 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1326 if (buff == NULL)
1327 return -EFAULT;
1328 }
1329 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1330 /* Copy the data into the buffer we created */
1331 if (copy_from_user
1332 (buff, iocommand.buf, iocommand.buf_size)) {
1333 kfree(buff);
1334 return -EFAULT;
1335 }
1336 } else {
1337 memset(buff, 0, iocommand.buf_size);
1338 }
1339 if ((c = cmd_alloc(host, 0)) == NULL) {
1340 kfree(buff);
1341 return -ENOMEM;
1342 }
1343 // Fill in the command type
1344 c->cmd_type = CMD_IOCTL_PEND;
1345 // Fill in Command Header
1346 c->Header.ReplyQueue = 0; // unused in simple mode
1347 if (iocommand.buf_size > 0) // buffer to fill
1348 {
1349 c->Header.SGList = 1;
1350 c->Header.SGTotal = 1;
1351 } else // no buffers to fill
1352 {
1353 c->Header.SGList = 0;
1354 c->Header.SGTotal = 0;
1355 }
1356 c->Header.LUN = iocommand.LUN_info;
1357 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1358
7c832835
BH		 1359 // Fill in Request block
1360 c->Request = iocommand.Request;
1da177e4 1361
7c832835
BH		 1362 // Fill in the scatter gather information
1363 if (iocommand.buf_size > 0) {
1364 temp64.val = pci_map_single(host->pdev, buff,
1365 iocommand.buf_size,
1366 PCI_DMA_BIDIRECTIONAL);
1367 c->SG[0].Addr.lower = temp64.val32.lower;
1368 c->SG[0].Addr.upper = temp64.val32.upper;
1369 c->SG[0].Len = iocommand.buf_size;
1370 c->SG[0].Ext = 0; // we are not chaining
1371 }
1372 c->waiting = &wait;
1373
1374 /* Put the request on the tail of the request queue */
1375 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1376 addQ(&host->reqQ, c);
1377 host->Qdepth++;
1378 start_io(host);
1379 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1380
1381 wait_for_completion(&wait);
1382
1383 /* unlock the buffers from DMA */
1384 temp64.val32.lower = c->SG[0].Addr.lower;
1385 temp64.val32.upper = c->SG[0].Addr.upper;
1386 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1387 iocommand.buf_size,
1388 PCI_DMA_BIDIRECTIONAL);
1389
0a9279cc
MM		 1390 check_ioctl_unit_attention(host, c);
1391
7c832835
BH		 1392 /* Copy the error information out */
1393 iocommand.error_info = *(c->err_info);
1394 if (copy_to_user
1395 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1396 kfree(buff);
1da177e4
LT		 1397 cmd_free(host, c, 0);
1398 return -EFAULT;
1399 }
7c832835
BH		 1400
1401 if (iocommand.Request.Type.Direction == XFER_READ) {
1402 /* Copy the data out of the buffer we created */
1403 if (copy_to_user
1404 (iocommand.buf, buff, iocommand.buf_size)) {
1405 kfree(buff);
1406 cmd_free(host, c, 0);
1407 return -EFAULT;
1408 }
1409 }
1410 kfree(buff);
1411 cmd_free(host, c, 0);
1412 return 0;
1da177e4 1413 }
7c832835
BH		 1414 case CCISS_BIG_PASSTHRU:{
1415 BIG_IOCTL_Command_struct *ioc;
1416 CommandList_struct *c;
1417 unsigned char **buff = NULL;
1418 int *buff_size = NULL;
1419 u64bit temp64;
1420 unsigned long flags;
1421 BYTE sg_used = 0;
1422 int status = 0;
1423 int i;
6e9a4738 1424 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1425 __u32 left;
1426 __u32 sz;
1427 BYTE __user *data_ptr;
1428
1429 if (!arg)
1430 return -EINVAL;
1431 if (!capable(CAP_SYS_RAWIO))
1432 return -EPERM;
1433 ioc = (BIG_IOCTL_Command_struct *)
1434 kmalloc(sizeof(*ioc), GFP_KERNEL);
1435 if (!ioc) {
1436 status = -ENOMEM;
1437 goto cleanup1;
1438 }
1439 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1440 status = -EFAULT;
1441 goto cleanup1;
1442 }
1443 if ((ioc->buf_size < 1) &&
1444 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1445 status = -EINVAL;
1446 goto cleanup1;
7c832835
BH		 1447 }
1448 /* Check kmalloc limits using all SGs */
1449 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1450 status = -EINVAL;
1451 goto cleanup1;
1452 }
1453 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1454 status = -EINVAL;
1455 goto cleanup1;
1456 }
1457 buff =
1458 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1459 if (!buff) {
1da177e4
LT		 1460 status = -ENOMEM;
1461 goto cleanup1;
1462 }
5cbded58 1463 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1464 GFP_KERNEL);
1465 if (!buff_size) {
1466 status = -ENOMEM;
1467 goto cleanup1;
1468 }
1469 left = ioc->buf_size;
1470 data_ptr = ioc->buf;
1471 while (left) {
1472 sz = (left >
1473 ioc->malloc_size) ? ioc->
1474 malloc_size : left;
1475 buff_size[sg_used] = sz;
1476 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1477 if (buff[sg_used] == NULL) {
1da177e4 1478 status = -ENOMEM;
15534d38
JA		 1479 goto cleanup1;
1480 }
7c832835
BH		 1481 if (ioc->Request.Type.Direction == XFER_WRITE) {
1482 if (copy_from_user
1483 (buff[sg_used], data_ptr, sz)) {
f7108f91 1484 status = -EFAULT;
7c832835
BH		 1485 goto cleanup1;
1486 }
1487 } else {
1488 memset(buff[sg_used], 0, sz);
1489 }
1490 left -= sz;
1491 data_ptr += sz;
1492 sg_used++;
1493 }
1494 if ((c = cmd_alloc(host, 0)) == NULL) {
1495 status = -ENOMEM;
1496 goto cleanup1;
1497 }
1498 c->cmd_type = CMD_IOCTL_PEND;
1499 c->Header.ReplyQueue = 0;
1500
1501 if (ioc->buf_size > 0) {
1502 c->Header.SGList = sg_used;
1503 c->Header.SGTotal = sg_used;
1da177e4 1504 } else {
7c832835
BH		 1505 c->Header.SGList = 0;
1506 c->Header.SGTotal = 0;
1da177e4 1507 }
7c832835
BH		 1508 c->Header.LUN = ioc->LUN_info;
1509 c->Header.Tag.lower = c->busaddr;
1510
1511 c->Request = ioc->Request;
1512 if (ioc->buf_size > 0) {
1513 int i;
1514 for (i = 0; i < sg_used; i++) {
1515 temp64.val =
1516 pci_map_single(host->pdev, buff[i],
1517 buff_size[i],
1518 PCI_DMA_BIDIRECTIONAL);
1519 c->SG[i].Addr.lower =
1520 temp64.val32.lower;
1521 c->SG[i].Addr.upper =
1522 temp64.val32.upper;
1523 c->SG[i].Len = buff_size[i];
1524 c->SG[i].Ext = 0; /* we are not chaining */
1525 }
1526 }
1527 c->waiting = &wait;
1528 /* Put the request on the tail of the request queue */
1529 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1530 addQ(&host->reqQ, c);
1531 host->Qdepth++;
1532 start_io(host);
1533 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1534 wait_for_completion(&wait);
1535 /* unlock the buffers from DMA */
1536 for (i = 0; i < sg_used; i++) {
1537 temp64.val32.lower = c->SG[i].Addr.lower;
1538 temp64.val32.upper = c->SG[i].Addr.upper;
1539 pci_unmap_single(host->pdev,
1540 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1541 PCI_DMA_BIDIRECTIONAL);
1da177e4 1542 }
0a9279cc 1543 check_ioctl_unit_attention(host, c);
7c832835
BH		 1544 /* Copy the error information out */
1545 ioc->error_info = *(c->err_info);
1546 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1547 cmd_free(host, c, 0);
1548 status = -EFAULT;
1549 goto cleanup1;
1550 }
1551 if (ioc->Request.Type.Direction == XFER_READ) {
1552 /* Copy the data out of the buffer we created */
1553 BYTE __user *ptr = ioc->buf;
1554 for (i = 0; i < sg_used; i++) {
1555 if (copy_to_user
1556 (ptr, buff[i], buff_size[i])) {
1557 cmd_free(host, c, 0);
1558 status = -EFAULT;
1559 goto cleanup1;
1560 }
1561 ptr += buff_size[i];
1da177e4 1562 }
1da177e4 1563 }
7c832835
BH		 1564 cmd_free(host, c, 0);
1565 status = 0;
1566 cleanup1:
1567 if (buff) {
1568 for (i = 0; i < sg_used; i++)
1569 kfree(buff[i]);
1570 kfree(buff);
1571 }
1572 kfree(buff_size);
1573 kfree(ioc);
1574 return status;
1da177e4 1575 }
03bbfee5
MMOD		 1576
1577 /* scsi_cmd_ioctl handles these, below, though some are not */
1578 /* very meaningful for cciss. SG_IO is the main one people want. */
1579
1580 case SG_GET_VERSION_NUM:
1581 case SG_SET_TIMEOUT:
1582 case SG_GET_TIMEOUT:
1583 case SG_GET_RESERVED_SIZE:
1584 case SG_SET_RESERVED_SIZE:
1585 case SG_EMULATED_HOST:
1586 case SG_IO:
1587 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1588 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1589
1590 /* scsi_cmd_ioctl would normally handle these, below, but */
1591 /* they aren't a good fit for cciss, as CD-ROMs are */
1592 /* not supported, and we don't have any bus/target/lun */
1593 /* which we present to the kernel. */
1594
1595 case CDROM_SEND_PACKET:
1596 case CDROMCLOSETRAY:
1597 case CDROMEJECT:
1598 case SCSI_IOCTL_GET_IDLUN:
1599 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1600 default:
1601 return -ENOTTY;
1602 }
1da177e4
LT		 1603}
1604
7b30f092
JA		 1605static void cciss_check_queues(ctlr_info_t *h)
1606{
1607 int start_queue = h->next_to_run;
1608 int i;
1609
1610 /* check to see if we have maxed out the number of commands that can
1611 * be placed on the queue. If so then exit. We do this check here
1612 * in case the interrupt we serviced was from an ioctl and did not
1613 * free any new commands.
1614 */
f880632f 1615 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1616 return;
1617
1618 /* We have room on the queue for more commands. Now we need to queue
1619 * them up. We will also keep track of the next queue to run so
1620 * that every queue gets a chance to be started first.
1621 */
1622 for (i = 0; i < h->highest_lun + 1; i++) {
1623 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1624 /* make sure the disk has been added and the drive is real
1625 * because this can be called from the middle of init_one.
1626 */
9cef0d2f
SC		 1627 if (!h->drv[curr_queue])
1628 continue;
1629 if (!(h->drv[curr_queue]->queue) ||
1630 !(h->drv[curr_queue]->heads))
7b30f092
JA		 1631 continue;
1632 blk_start_queue(h->gendisk[curr_queue]->queue);
1633
1634 /* check to see if we have maxed out the number of commands
1635 * that can be placed on the queue.
1636 */
f880632f 1637 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1638 if (curr_queue == start_queue) {
1639 h->next_to_run =
1640 (start_queue + 1) % (h->highest_lun + 1);
1641 break;
1642 } else {
1643 h->next_to_run = curr_queue;
1644 break;
1645 }
7b30f092
JA		 1646 }
1647 }
1648}
1649
ca1e0484
MM		 1650static void cciss_softirq_done(struct request *rq)
1651{
1652 CommandList_struct *cmd = rq->completion_data;
1653 ctlr_info_t *h = hba[cmd->ctlr];
1654 unsigned long flags;
1655 u64bit temp64;
1656 int i, ddir;
1657
1658 if (cmd->Request.Type.Direction == XFER_READ)
1659 ddir = PCI_DMA_FROMDEVICE;
1660 else
1661 ddir = PCI_DMA_TODEVICE;
1662
1663 /* command did not need to be retried */
1664 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1665 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1666 temp64.val32.lower = cmd->SG[i].Addr.lower;
1667 temp64.val32.upper = cmd->SG[i].Addr.upper;
1668 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1669 }
1670
ca1e0484
MM		 1671#ifdef CCISS_DEBUG
1672 printk("Done with %p\n", rq);
7c832835 1673#endif /* CCISS_DEBUG */
ca1e0484 1674
c3a4d78c 1675 /* set the residual count for pc requests */
ac44e5b2 1676 if (blk_pc_request(rq))
c3a4d78c 1677 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1678
c3a4d78c 1679 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1680
ca1e0484 1681 spin_lock_irqsave(&h->lock, flags);
7c832835 1682 cmd_free(h, cmd, 1);
7b30f092 1683 cciss_check_queues(h);
ca1e0484
MM		 1684 spin_unlock_irqrestore(&h->lock, flags);
1685}
1686
39ccf9a6
SC		 1687static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1688 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1689{
9cef0d2f
SC		 1690 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1691 sizeof(h->drv[log_unit]->LunID));
b57695fe 1692}
1693
7fe06326
AP		 1694/* This function gets the SCSI vendor, model, and revision of a logical drive
1695 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1696 * they cannot be read.
1697 */
1698static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1699 char *vendor, char *model, char *rev)
1700{
1701 int rc;
1702 InquiryData_struct *inq_buf;
b57695fe 1703 unsigned char scsi3addr[8];
7fe06326
AP		 1704
1705 *vendor = '\0';
1706 *model = '\0';
1707 *rev = '\0';
1708
1709 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1710 if (!inq_buf)
1711 return;
1712
b57695fe 1713 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1714 if (withirq)
1715 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1716 sizeof(InquiryData_struct), 0,
1717 scsi3addr, TYPE_CMD);
7fe06326
AP		 1718 else
1719 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1720 sizeof(InquiryData_struct), 0,
1721 scsi3addr, TYPE_CMD);
7fe06326
AP		 1722 if (rc == IO_OK) {
1723 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1724 vendor[VENDOR_LEN] = '\0';
1725 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1726 model[MODEL_LEN] = '\0';
1727 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1728 rev[REV_LEN] = '\0';
1729 }
1730
1731 kfree(inq_buf);
1732 return;
1733}
1734
a72da29b
MM		 1735/* This function gets the serial number of a logical drive via
1736 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1737 * number cannot be had, for whatever reason, 16 bytes of 0xff
1738 * are returned instead.
1739 */
1740static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1741 unsigned char *serial_no, int buflen)
1742{
1743#define PAGE_83_INQ_BYTES 64
1744 int rc;
1745 unsigned char *buf;
b57695fe 1746 unsigned char scsi3addr[8];
a72da29b
MM		 1747
1748 if (buflen > 16)
1749 buflen = 16;
1750 memset(serial_no, 0xff, buflen);
1751 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1752 if (!buf)
1753 return;
1754 memset(serial_no, 0, buflen);
b57695fe 1755 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1756 if (withirq)
1757 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1758 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1759 else
1760 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1761 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1762 if (rc == IO_OK)
1763 memcpy(serial_no, &buf[8], buflen);
1764 kfree(buf);
1765 return;
1766}
1767
617e1344
SC		 1768/*
1769 * cciss_add_disk sets up the block device queue for a logical drive
1770 */
1771static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1772 int drv_index)
1773{
1774 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1775 if (!disk->queue)
1776 goto init_queue_failure;
6ae5ce8e
MM		 1777 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1778 disk->major = h->major;
1779 disk->first_minor = drv_index << NWD_SHIFT;
1780 disk->fops = &cciss_fops;
9cef0d2f
SC		 1781 if (cciss_create_ld_sysfs_entry(h, drv_index))
1782 goto cleanup_queue;
1783 disk->private_data = h->drv[drv_index];
1784 disk->driverfs_dev = &h->drv[drv_index]->dev;
6ae5ce8e
MM		 1785
1786 /* Set up queue information */
1787 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1788
1789 /* This is a hardware imposed limit. */
1790 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1791
1792 /* This is a limit in the driver and could be eliminated. */
1793 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1794
1795 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1796
1797 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1798
1799 disk->queue->queuedata = h;
1800
e1defc4f 1801 blk_queue_logical_block_size(disk->queue,
9cef0d2f 1802 h->drv[drv_index]->block_size);
6ae5ce8e
MM		 1803
1804 /* Make sure all queue data is written out before */
9cef0d2f 1805 /* setting h->drv[drv_index]->queue, as setting this */
6ae5ce8e
MM		 1806 /* allows the interrupt handler to start the queue */
1807 wmb();
9cef0d2f 1808 h->drv[drv_index]->queue = disk->queue;
6ae5ce8e 1809 add_disk(disk);
617e1344
SC		 1810 return 0;
1811
1812cleanup_queue:
1813 blk_cleanup_queue(disk->queue);
1814 disk->queue = NULL;
e8074f79 1815init_queue_failure:
617e1344 1816 return -1;
6ae5ce8e
MM		 1817}
1818
ddd47442 1819/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1820 * If the usage_count is zero and it is a heretofore unknown drive, or,
1821 * the drive's capacity, geometry, or serial number has changed,
1822 * then the drive information will be updated and the disk will be
1823 * re-registered with the kernel. If these conditions don't hold,
1824 * then it will be left alone for the next reboot. The exception to this
1825 * is disk 0 which will always be left registered with the kernel since it
1826 * is also the controller node. Any changes to disk 0 will show up on
1827 * the next reboot.
7c832835 1828 */
2d11d993
SC		 1829static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1830 int via_ioctl)
7c832835 1831{
ddd47442
MM		 1832 ctlr_info_t *h = hba[ctlr];
1833 struct gendisk *disk;
ddd47442
MM		 1834 InquiryData_struct *inq_buff = NULL;
1835 unsigned int block_size;
00988a35 1836 sector_t total_size;
ddd47442
MM		 1837 unsigned long flags = 0;
1838 int ret = 0;
a72da29b
MM		 1839 drive_info_struct *drvinfo;
1840
1841 /* Get information about the disk and modify the driver structure */
1842 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 1843 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM		 1844 if (inq_buff == NULL || drvinfo == NULL)
1845 goto mem_msg;
1846
1847 /* testing to see if 16-byte CDBs are already being used */
1848 if (h->cciss_read == CCISS_READ_16) {
1849 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1850 &total_size, &block_size);
1851
1852 } else {
1853 cciss_read_capacity(ctlr, drv_index, 1,
1854 &total_size, &block_size);
1855
1856 /* if read_capacity returns all F's this volume is >2TB */
1857 /* in size so we switch to 16-byte CDB's for all */
1858 /* read/write ops */
1859 if (total_size == 0xFFFFFFFFULL) {
1860 cciss_read_capacity_16(ctlr, drv_index, 1,
1861 &total_size, &block_size);
1862 h->cciss_read = CCISS_READ_16;
1863 h->cciss_write = CCISS_WRITE_16;
1864 } else {
1865 h->cciss_read = CCISS_READ_10;
1866 h->cciss_write = CCISS_WRITE_10;
1867 }
1868 }
1869
1870 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1871 inq_buff, drvinfo);
1872 drvinfo->block_size = block_size;
1873 drvinfo->nr_blocks = total_size + 1;
1874
7fe06326
AP		 1875 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1876 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1877 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1878 sizeof(drvinfo->serial_no));
9cef0d2f
SC		 1879 /* Save the lunid in case we deregister the disk, below. */
1880 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1881 sizeof(drvinfo->LunID));
a72da29b
MM		 1882
1883 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 1884 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 1885 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC		 1886 h->drv[drv_index]->serial_no, 16) == 0) &&
1887 drvinfo->block_size == h->drv[drv_index]->block_size &&
1888 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1889 drvinfo->heads == h->drv[drv_index]->heads &&
1890 drvinfo->sectors == h->drv[drv_index]->sectors &&
1891 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM		 1892 /* The disk is unchanged, nothing to update */
1893 goto freeret;
a72da29b 1894
6ae5ce8e
MM		 1895 /* If we get here it's not the same disk, or something's changed,
1896 * so we need to * deregister it, and re-register it, if it's not
1897 * in use.
1898 * If the disk already exists then deregister it before proceeding
1899 * (unless it's the first disk (for the controller node).
1900 */
9cef0d2f 1901 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
a72da29b 1902 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442 1903 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 1904 h->drv[drv_index]->busy_configuring = 1;
ddd47442 1905 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1906
9cef0d2f 1907 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM		 1908 * which keeps the interrupt handler from starting
1909 * the queue.
1910 */
2d11d993 1911 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1912 }
1913
1914 /* If the disk is in use return */
1915 if (ret)
a72da29b
MM		 1916 goto freeret;
1917
6ae5ce8e 1918 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC		 1919 * and serial number inquiry. If the disk was deregistered
1920 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 1921 */
9cef0d2f
SC		 1922 if (h->drv[drv_index] == NULL) {
1923 drvinfo->device_initialized = 0;
1924 h->drv[drv_index] = drvinfo;
1925 drvinfo = NULL; /* so it won't be freed below. */
1926 } else {
1927 /* special case for cxd0 */
1928 h->drv[drv_index]->block_size = drvinfo->block_size;
1929 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
1930 h->drv[drv_index]->heads = drvinfo->heads;
1931 h->drv[drv_index]->sectors = drvinfo->sectors;
1932 h->drv[drv_index]->cylinders = drvinfo->cylinders;
1933 h->drv[drv_index]->raid_level = drvinfo->raid_level;
1934 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
1935 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
1936 VENDOR_LEN + 1);
1937 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
1938 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
1939 }
ddd47442
MM		 1940
1941 ++h->num_luns;
1942 disk = h->gendisk[drv_index];
9cef0d2f 1943 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 1944
6ae5ce8e
MM		 1945 /* If it's not disk 0 (drv_index != 0)
1946 * or if it was disk 0, but there was previously
1947 * no actual corresponding configured logical drive
1948 * (raid_leve == -1) then we want to update the
1949 * logical drive's information.
1950 */
361e9b07
SC		 1951 if (drv_index || first_time) {
1952 if (cciss_add_disk(h, disk, drv_index) != 0) {
1953 cciss_free_gendisk(h, drv_index);
9cef0d2f 1954 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 1955 printk(KERN_WARNING "cciss:%d could not update "
1956 "disk %d\n", h->ctlr, drv_index);
1957 --h->num_luns;
1958 }
1959 }
ddd47442 1960
6ae5ce8e 1961freeret:
ddd47442 1962 kfree(inq_buff);
a72da29b 1963 kfree(drvinfo);
ddd47442 1964 return;
6ae5ce8e 1965mem_msg:
ddd47442
MM		 1966 printk(KERN_ERR "cciss: out of memory\n");
1967 goto freeret;
1968}
1969
1970/* This function will find the first index of the controllers drive array
9cef0d2f
SC		 1971 * that has a null drv pointer and allocate the drive info struct and
1972 * will return that index This is where new drives will be added.
1973 * If the index to be returned is greater than the highest_lun index for
1974 * the controller then highest_lun is set * to this new index.
1975 * If there are no available indexes or if tha allocation fails, then -1
1976 * is returned. * "controller_node" is used to know if this is a real
1977 * logical drive, or just the controller node, which determines if this
1978 * counts towards highest_lun.
7c832835 1979 */
9cef0d2f 1980static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM		 1981{
1982 int i;
9cef0d2f 1983 drive_info_struct *drv;
ddd47442 1984
9cef0d2f 1985 /* Search for an empty slot for our drive info */
7c832835 1986 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC		 1987
1988 /* if not cxd0 case, and it's occupied, skip it. */
1989 if (h->drv[i] && i != 0)
1990 continue;
1991 /*
1992 * If it's cxd0 case, and drv is alloc'ed already, and a
1993 * disk is configured there, skip it.
1994 */
1995 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
1996 continue;
1997
1998 /*
1999 * We've found an empty slot. Update highest_lun
2000 * provided this isn't just the fake cxd0 controller node.
2001 */
2002 if (i > h->highest_lun && !controller_node)
2003 h->highest_lun = i;
2004
2005 /* If adding a real disk at cxd0, and it's already alloc'ed */
2006 if (i == 0 && h->drv[i] != NULL)
ddd47442 2007 return i;
9cef0d2f
SC		 2008
2009 /*
2010 * Found an empty slot, not already alloc'ed. Allocate it.
2011 * Mark it with raid_level == -1, so we know it's new later on.
2012 */
2013 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2014 if (!drv)
2015 return -1;
2016 drv->raid_level = -1; /* so we know it's new */
2017 h->drv[i] = drv;
2018 return i;
ddd47442
MM		 2019 }
2020 return -1;
2021}
2022
9cef0d2f
SC		 2023static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2024{
2025 kfree(h->drv[drv_index]);
2026 h->drv[drv_index] = NULL;
2027}
2028
361e9b07
SC		 2029static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2030{
2031 put_disk(h->gendisk[drv_index]);
2032 h->gendisk[drv_index] = NULL;
2033}
2034
6ae5ce8e
MM		 2035/* cciss_add_gendisk finds a free hba[]->drv structure
2036 * and allocates a gendisk if needed, and sets the lunid
2037 * in the drvinfo structure. It returns the index into
2038 * the ->drv[] array, or -1 if none are free.
2039 * is_controller_node indicates whether highest_lun should
2040 * count this disk, or if it's only being added to provide
2041 * a means to talk to the controller in case no logical
2042 * drives have yet been configured.
2043 */
39ccf9a6
SC		 2044static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2045 int controller_node)
6ae5ce8e
MM		 2046{
2047 int drv_index;
2048
9cef0d2f 2049 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM		 2050 if (drv_index == -1)
2051 return -1;
8ce51966 2052
6ae5ce8e
MM		 2053 /*Check if the gendisk needs to be allocated */
2054 if (!h->gendisk[drv_index]) {
2055 h->gendisk[drv_index] =
2056 alloc_disk(1 << NWD_SHIFT);
2057 if (!h->gendisk[drv_index]) {
2058 printk(KERN_ERR "cciss%d: could not "
2059 "allocate a new disk %d\n",
2060 h->ctlr, drv_index);
9cef0d2f 2061 goto err_free_drive_info;
6ae5ce8e
MM		 2062 }
2063 }
9cef0d2f
SC		 2064 memcpy(h->drv[drv_index]->LunID, lunid,
2065 sizeof(h->drv[drv_index]->LunID));
2066 if (cciss_create_ld_sysfs_entry(h, drv_index))
2067 goto err_free_disk;
6ae5ce8e
MM		 2068 /* Don't need to mark this busy because nobody */
2069 /* else knows about this disk yet to contend */
2070 /* for access to it. */
9cef0d2f 2071 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM		 2072 wmb();
2073 return drv_index;
7fe06326
AP		 2074
2075err_free_disk:
361e9b07 2076 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC		 2077err_free_drive_info:
2078 cciss_free_drive_info(h, drv_index);
7fe06326 2079 return -1;
6ae5ce8e
MM		 2080}
2081
2082/* This is for the special case of a controller which
2083 * has no logical drives. In this case, we still need
2084 * to register a disk so the controller can be accessed
2085 * by the Array Config Utility.
2086 */
2087static void cciss_add_controller_node(ctlr_info_t *h)
2088{
2089 struct gendisk *disk;
2090 int drv_index;
2091
2092 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2093 return;
2094
39ccf9a6 2095 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2096 if (drv_index == -1)
2097 goto error;
9cef0d2f
SC		 2098 h->drv[drv_index]->block_size = 512;
2099 h->drv[drv_index]->nr_blocks = 0;
2100 h->drv[drv_index]->heads = 0;
2101 h->drv[drv_index]->sectors = 0;
2102 h->drv[drv_index]->cylinders = 0;
2103 h->drv[drv_index]->raid_level = -1;
2104 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2105 disk = h->gendisk[drv_index];
361e9b07
SC		 2106 if (cciss_add_disk(h, disk, drv_index) == 0)
2107 return;
2108 cciss_free_gendisk(h, drv_index);
9cef0d2f 2109 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2110error:
2111 printk(KERN_WARNING "cciss%d: could not "
2112 "add disk 0.\n", h->ctlr);
2113 return;
6ae5ce8e
MM		 2114}
2115
ddd47442 2116/* This function will add and remove logical drives from the Logical
d14c4ab5 2117 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2118 * so that mount points are preserved until the next reboot. This allows
2119 * for the removal of logical drives in the middle of the drive array
2120 * without a re-ordering of those drives.
2121 * INPUT
2122 * h = The controller to perform the operations on
7c832835 2123 */
2d11d993
SC		 2124static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2125 int via_ioctl)
1da177e4 2126{
ddd47442
MM		 2127 int ctlr = h->ctlr;
2128 int num_luns;
2129 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2130 int return_code;
2131 int listlength = 0;
2132 int i;
2133 int drv_found;
2134 int drv_index = 0;
39ccf9a6 2135 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2136 unsigned long flags;
ddd47442 2137
6ae5ce8e
MM		 2138 if (!capable(CAP_SYS_RAWIO))
2139 return -EPERM;
2140
ddd47442
MM		 2141 /* Set busy_configuring flag for this operation */
2142 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2143 if (h->busy_configuring) {
ddd47442
MM		 2144 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2145 return -EBUSY;
2146 }
2147 h->busy_configuring = 1;
a72da29b 2148 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2149
a72da29b
MM		 2150 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2151 if (ld_buff == NULL)
2152 goto mem_msg;
2153
2154 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2155 sizeof(ReportLunData_struct),
2156 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2157
a72da29b
MM		 2158 if (return_code == IO_OK)
2159 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2160 else { /* reading number of logical volumes failed */
2161 printk(KERN_WARNING "cciss: report logical volume"
2162 " command failed\n");
2163 listlength = 0;
2164 goto freeret;
2165 }
2166
2167 num_luns = listlength / 8; /* 8 bytes per entry */
2168 if (num_luns > CISS_MAX_LUN) {
2169 num_luns = CISS_MAX_LUN;
2170 printk(KERN_WARNING "cciss: more luns configured"
2171 " on controller than can be handled by"
2172 " this driver.\n");
2173 }
2174
6ae5ce8e
MM		 2175 if (num_luns == 0)
2176 cciss_add_controller_node(h);
2177
2178 /* Compare controller drive array to driver's drive array
2179 * to see if any drives are missing on the controller due
2180 * to action of Array Config Utility (user deletes drive)
2181 * and deregister logical drives which have disappeared.
2182 */
a72da29b
MM		 2183 for (i = 0; i <= h->highest_lun; i++) {
2184 int j;
2185 drv_found = 0;
d8a0be6a
SC		 2186
2187 /* skip holes in the array from already deleted drives */
9cef0d2f 2188 if (h->drv[i] == NULL)
d8a0be6a
SC		 2189 continue;
2190
a72da29b 2191 for (j = 0; j < num_luns; j++) {
39ccf9a6 2192 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2193 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2194 sizeof(lunid)) == 0) {
a72da29b
MM		 2195 drv_found = 1;
2196 break;
2197 }
2198 }
2199 if (!drv_found) {
2200 /* Deregister it from the OS, it's gone. */
2201 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2202 h->drv[i]->busy_configuring = 1;
a72da29b 2203 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2204 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC		 2205 if (h->drv[i] != NULL)
2206 h->drv[i]->busy_configuring = 0;
ddd47442 2207 }
a72da29b 2208 }
ddd47442 2209
a72da29b
MM		 2210 /* Compare controller drive array to driver's drive array.
2211 * Check for updates in the drive information and any new drives
2212 * on the controller due to ACU adding logical drives, or changing
2213 * a logical drive's size, etc. Reregister any new/changed drives
2214 */
2215 for (i = 0; i < num_luns; i++) {
2216 int j;
ddd47442 2217
a72da29b 2218 drv_found = 0;
ddd47442 2219
39ccf9a6 2220 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2221 /* Find if the LUN is already in the drive array
2222 * of the driver. If so then update its info
2223 * if not in use. If it does not exist then find
2224 * the first free index and add it.
2225 */
2226 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC		 2227 if (h->drv[j] != NULL &&
2228 memcmp(h->drv[j]->LunID, lunid,
2229 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM		 2230 drv_index = j;
2231 drv_found = 1;
2232 break;
ddd47442 2233 }
a72da29b 2234 }
ddd47442 2235
a72da29b
MM		 2236 /* check if the drive was found already in the array */
2237 if (!drv_found) {
eece695f 2238 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2239 if (drv_index == -1)
2240 goto freeret;
a72da29b 2241 }
2d11d993
SC		 2242 cciss_update_drive_info(ctlr, drv_index, first_time,
2243 via_ioctl);
a72da29b 2244 } /* end for */
ddd47442 2245
6ae5ce8e 2246freeret:
ddd47442
MM		 2247 kfree(ld_buff);
2248 h->busy_configuring = 0;
2249 /* We return -1 here to tell the ACU that we have registered/updated
2250 * all of the drives that we can and to keep it from calling us
2251 * additional times.
7c832835 2252 */
ddd47442 2253 return -1;
6ae5ce8e 2254mem_msg:
ddd47442 2255 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2256 h->busy_configuring = 0;
ddd47442
MM		 2257 goto freeret;
2258}
2259
9ddb27b4
SC		 2260static void cciss_clear_drive_info(drive_info_struct *drive_info)
2261{
2262 /* zero out the disk size info */
2263 drive_info->nr_blocks = 0;
2264 drive_info->block_size = 0;
2265 drive_info->heads = 0;
2266 drive_info->sectors = 0;
2267 drive_info->cylinders = 0;
2268 drive_info->raid_level = -1;
2269 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2270 memset(drive_info->model, 0, sizeof(drive_info->model));
2271 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2272 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2273 /*
2274 * don't clear the LUNID though, we need to remember which
2275 * one this one is.
2276 */
2277}
2278
ddd47442
MM		 2279/* This function will deregister the disk and it's queue from the
2280 * kernel. It must be called with the controller lock held and the
2281 * drv structures busy_configuring flag set. It's parameters are:
2282 *
2283 * disk = This is the disk to be deregistered
2284 * drv = This is the drive_info_struct associated with the disk to be
2285 * deregistered. It contains information about the disk used
2286 * by the driver.
2287 * clear_all = This flag determines whether or not the disk information
2288 * is going to be completely cleared out and the highest_lun
2289 * reset. Sometimes we want to clear out information about
d14c4ab5 2290 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2291 * the highest_lun should be left unchanged and the LunID
2292 * should not be cleared.
2d11d993
SC		 2293 * via_ioctl
2294 * This indicates whether we've reached this path via ioctl.
2295 * This affects the maximum usage count allowed for c0d0 to be messed with.
2296 * If this path is reached via ioctl(), then the max_usage_count will
2297 * be 1, as the process calling ioctl() has got to have the device open.
2298 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2299*/
a0ea8622 2300static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2301 int clear_all, int via_ioctl)
ddd47442 2302{
799202cb 2303 int i;
a0ea8622
SC		 2304 struct gendisk *disk;
2305 drive_info_struct *drv;
9cef0d2f 2306 int recalculate_highest_lun;
1da177e4
LT		 2307
2308 if (!capable(CAP_SYS_RAWIO))
2309 return -EPERM;
2310
9cef0d2f 2311 drv = h->drv[drv_index];
a0ea8622
SC		 2312 disk = h->gendisk[drv_index];
2313
1da177e4 2314 /* make sure logical volume is NOT is use */
7c832835 2315 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2316 if (drv->usage_count > via_ioctl)
7c832835
BH		 2317 return -EBUSY;
2318 } else if (drv->usage_count > 0)
2319 return -EBUSY;
1da177e4 2320
9cef0d2f
SC		 2321 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2322
ddd47442
MM		 2323 /* invalidate the devices and deregister the disk. If it is disk
2324 * zero do not deregister it but just zero out it's values. This
2325 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2326 */
2327 if (h->gendisk[0] != disk) {
5a9df732 2328 struct request_queue *q = disk->queue;
097d0264 2329 if (disk->flags & GENHD_FL_UP) {
8ce51966 2330 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2331 del_gendisk(disk);
097d0264 2332 }
9cef0d2f 2333 if (q)
5a9df732 2334 blk_cleanup_queue(q);
5a9df732
AB		 2335 /* If clear_all is set then we are deleting the logical
2336 * drive, not just refreshing its info. For drives
2337 * other than disk 0 we will call put_disk. We do not
2338 * do this for disk 0 as we need it to be able to
2339 * configure the controller.
a72da29b 2340 */
5a9df732
AB		 2341 if (clear_all){
2342 /* This isn't pretty, but we need to find the
2343 * disk in our array and NULL our the pointer.
2344 * This is so that we will call alloc_disk if
2345 * this index is used again later.
a72da29b 2346 */
5a9df732 2347 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2348 if (h->gendisk[i] == disk) {
5a9df732
AB		 2349 h->gendisk[i] = NULL;
2350 break;
799202cb 2351 }
799202cb 2352 }
5a9df732 2353 put_disk(disk);
ddd47442 2354 }
799202cb
MM		 2355 } else {
2356 set_capacity(disk, 0);
9cef0d2f 2357 cciss_clear_drive_info(drv);
ddd47442
MM		 2358 }
2359
2360 --h->num_luns;
9cef0d2f
SC		 2361
2362 /* if it was the last disk, find the new hightest lun */
2363 if (clear_all && recalculate_highest_lun) {
2364 int i, newhighest = -1;
2365 for (i = 0; i <= h->highest_lun; i++) {
2366 /* if the disk has size > 0, it is available */
2367 if (h->drv[i] && h->drv[i]->heads)
2368 newhighest = i;
1da177e4 2369 }
9cef0d2f 2370 h->highest_lun = newhighest;
ddd47442 2371 }
e2019b58 2372 return 0;
1da177e4 2373}
ddd47442 2374
b57695fe 2375static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2376 size_t size, __u8 page_code, unsigned char *scsi3addr,
2377 int cmd_type)
1da177e4 2378{
7c832835 2379 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2380 u64bit buff_dma_handle;
2381 int status = IO_OK;
2382
2383 c->cmd_type = CMD_IOCTL_PEND;
2384 c->Header.ReplyQueue = 0;
7c832835 2385 if (buff != NULL) {
1da177e4 2386 c->Header.SGList = 1;
7c832835 2387 c->Header.SGTotal = 1;
1da177e4
LT		 2388 } else {
2389 c->Header.SGList = 0;
7c832835 2390 c->Header.SGTotal = 0;
1da177e4
LT		 2391 }
2392 c->Header.Tag.lower = c->busaddr;
b57695fe 2393 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2394
2395 c->Request.Type.Type = cmd_type;
2396 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2397 switch (cmd) {
2398 case CISS_INQUIRY:
1da177e4 2399 /* are we trying to read a vital product page */
7c832835 2400 if (page_code != 0) {
1da177e4
LT		 2401 c->Request.CDB[1] = 0x01;
2402 c->Request.CDB[2] = page_code;
2403 }
2404 c->Request.CDBLen = 6;
7c832835 2405 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2406 c->Request.Type.Direction = XFER_READ;
2407 c->Request.Timeout = 0;
7c832835
BH		 2408 c->Request.CDB[0] = CISS_INQUIRY;
2409 c->Request.CDB[4] = size & 0xFF;
2410 break;
1da177e4
LT		 2411 case CISS_REPORT_LOG:
2412 case CISS_REPORT_PHYS:
7c832835 2413 /* Talking to controller so It's a physical command
1da177e4 2414 mode = 00 target = 0. Nothing to write.
7c832835 2415 */
1da177e4
LT		 2416 c->Request.CDBLen = 12;
2417 c->Request.Type.Attribute = ATTR_SIMPLE;
2418 c->Request.Type.Direction = XFER_READ;
2419 c->Request.Timeout = 0;
2420 c->Request.CDB[0] = cmd;
7c832835 2421 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2422 c->Request.CDB[7] = (size >> 16) & 0xFF;
2423 c->Request.CDB[8] = (size >> 8) & 0xFF;
2424 c->Request.CDB[9] = size & 0xFF;
2425 break;
2426
2427 case CCISS_READ_CAPACITY:
1da177e4
LT		 2428 c->Request.CDBLen = 10;
2429 c->Request.Type.Attribute = ATTR_SIMPLE;
2430 c->Request.Type.Direction = XFER_READ;
2431 c->Request.Timeout = 0;
2432 c->Request.CDB[0] = cmd;
7c832835 2433 break;
00988a35 2434 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2435 c->Request.CDBLen = 16;
2436 c->Request.Type.Attribute = ATTR_SIMPLE;
2437 c->Request.Type.Direction = XFER_READ;
2438 c->Request.Timeout = 0;
2439 c->Request.CDB[0] = cmd;
2440 c->Request.CDB[1] = 0x10;
2441 c->Request.CDB[10] = (size >> 24) & 0xFF;
2442 c->Request.CDB[11] = (size >> 16) & 0xFF;
2443 c->Request.CDB[12] = (size >> 8) & 0xFF;
2444 c->Request.CDB[13] = size & 0xFF;
2445 c->Request.Timeout = 0;
2446 c->Request.CDB[0] = cmd;
2447 break;
1da177e4
LT		 2448 case CCISS_CACHE_FLUSH:
2449 c->Request.CDBLen = 12;
2450 c->Request.Type.Attribute = ATTR_SIMPLE;
2451 c->Request.Type.Direction = XFER_WRITE;
2452 c->Request.Timeout = 0;
2453 c->Request.CDB[0] = BMIC_WRITE;
2454 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2455 break;
88f627ae 2456 case TEST_UNIT_READY:
88f627ae
SC		 2457 c->Request.CDBLen = 6;
2458 c->Request.Type.Attribute = ATTR_SIMPLE;
2459 c->Request.Type.Direction = XFER_NONE;
2460 c->Request.Timeout = 0;
2461 break;
1da177e4
LT		 2462 default:
2463 printk(KERN_WARNING
7c832835 2464 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2465 return IO_ERROR;
1da177e4
LT		 2466 }
2467 } else if (cmd_type == TYPE_MSG) {
2468 switch (cmd) {
7c832835 2469 case 0: /* ABORT message */
3da8b713 2470 c->Request.CDBLen = 12;
2471 c->Request.Type.Attribute = ATTR_SIMPLE;
2472 c->Request.Type.Direction = XFER_WRITE;
2473 c->Request.Timeout = 0;
7c832835
BH		 2474 c->Request.CDB[0] = cmd; /* abort */
2475 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2476 /* buff contains the tag of the command to abort */
2477 memcpy(&c->Request.CDB[4], buff, 8);
2478 break;
7c832835 2479 case 1: /* RESET message */
88f627ae 2480 c->Request.CDBLen = 16;
3da8b713 2481 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2482 c->Request.Type.Direction = XFER_NONE;
3da8b713 2483 c->Request.Timeout = 0;
2484 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2485 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2486 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2487 break;
1da177e4
LT		 2488 case 3: /* No-Op message */
2489 c->Request.CDBLen = 1;
2490 c->Request.Type.Attribute = ATTR_SIMPLE;
2491 c->Request.Type.Direction = XFER_WRITE;
2492 c->Request.Timeout = 0;
2493 c->Request.CDB[0] = cmd;
2494 break;
2495 default:
2496 printk(KERN_WARNING
7c832835 2497 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2498 return IO_ERROR;
2499 }
2500 } else {
2501 printk(KERN_WARNING
7c832835 2502 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2503 return IO_ERROR;
2504 }
2505 /* Fill in the scatter gather information */
2506 if (size > 0) {
2507 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2508 buff, size,
2509 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2510 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2511 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2512 c->SG[0].Len = size;
7c832835 2513 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2514 }
2515 return status;
2516}
7c832835 2517
3c2ab402 2518static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2519{
2520 switch (c->err_info->ScsiStatus) {
2521 case SAM_STAT_GOOD:
2522 return IO_OK;
2523 case SAM_STAT_CHECK_CONDITION:
2524 switch (0xf & c->err_info->SenseInfo[2]) {
2525 case 0: return IO_OK; /* no sense */
2526 case 1: return IO_OK; /* recovered error */
2527 default:
2528 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2529 "check condition, sense key = 0x%02x\n",
2530 h->ctlr, c->Request.CDB[0],
2531 c->err_info->SenseInfo[2]);
2532 }
2533 break;
2534 default:
2535 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2536 "scsi status = 0x%02x\n", h->ctlr,
2537 c->Request.CDB[0], c->err_info->ScsiStatus);
2538 break;
2539 }
2540 return IO_ERROR;
2541}
2542
789a424a 2543static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2544{
5390cfc3 2545 int return_status = IO_OK;
7c832835 2546
789a424a 2547 if (c->err_info->CommandStatus == CMD_SUCCESS)
2548 return IO_OK;
5390cfc3 2549
2550 switch (c->err_info->CommandStatus) {
2551 case CMD_TARGET_STATUS:
3c2ab402 2552 return_status = check_target_status(h, c);
5390cfc3 2553 break;
2554 case CMD_DATA_UNDERRUN:
2555 case CMD_DATA_OVERRUN:
2556 /* expected for inquiry and report lun commands */
2557 break;
2558 case CMD_INVALID:
789a424a 2559 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2560 "reported invalid\n", c->Request.CDB[0]);
2561 return_status = IO_ERROR;
2562 break;
2563 case CMD_PROTOCOL_ERR:
2564 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2565 "protocol error \n", c->Request.CDB[0]);
2566 return_status = IO_ERROR;
2567 break;
2568 case CMD_HARDWARE_ERR:
2569 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2570 " hardware error\n", c->Request.CDB[0]);
2571 return_status = IO_ERROR;
2572 break;
2573 case CMD_CONNECTION_LOST:
2574 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2575 "connection lost\n", c->Request.CDB[0]);
2576 return_status = IO_ERROR;
2577 break;
2578 case CMD_ABORTED:
2579 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2580 "aborted\n", c->Request.CDB[0]);
2581 return_status = IO_ERROR;
2582 break;
2583 case CMD_ABORT_FAILED:
2584 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2585 "abort failed\n", c->Request.CDB[0]);
2586 return_status = IO_ERROR;
2587 break;
2588 case CMD_UNSOLICITED_ABORT:
2589 printk(KERN_WARNING
2590 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2591 c->Request.CDB[0]);
789a424a 2592 return_status = IO_NEEDS_RETRY;
5390cfc3 2593 break;
2594 default:
2595 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2596 "unknown status %x\n", c->Request.CDB[0],
2597 c->err_info->CommandStatus);
2598 return_status = IO_ERROR;
7c832835 2599 }
789a424a 2600 return return_status;
2601}
2602
2603static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2604 int attempt_retry)
2605{
2606 DECLARE_COMPLETION_ONSTACK(wait);
2607 u64bit buff_dma_handle;
2608 unsigned long flags;
2609 int return_status = IO_OK;
2610
2611resend_cmd2:
2612 c->waiting = &wait;
2613 /* Put the request on the tail of the queue and send it */
2614 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2615 addQ(&h->reqQ, c);
2616 h->Qdepth++;
2617 start_io(h);
2618 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2619
2620 wait_for_completion(&wait);
2621
2622 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2623 goto command_done;
2624
2625 return_status = process_sendcmd_error(h, c);
2626
2627 if (return_status == IO_NEEDS_RETRY &&
2628 c->retry_count < MAX_CMD_RETRIES) {
2629 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2630 c->Request.CDB[0]);
2631 c->retry_count++;
2632 /* erase the old error information */
2633 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2634 return_status = IO_OK;
2635 INIT_COMPLETION(wait);
2636 goto resend_cmd2;
2637 }
5390cfc3 2638
2639command_done:
1da177e4 2640 /* unlock the buffers from DMA */
bb2a37bf
MM		 2641 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2642 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2643 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2644 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2645 return return_status;
2646}
2647
b57695fe 2648static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2649 __u8 page_code, unsigned char scsi3addr[],
2650 int cmd_type)
5390cfc3 2651{
2652 ctlr_info_t *h = hba[ctlr];
2653 CommandList_struct *c;
2654 int return_status;
2655
2656 c = cmd_alloc(h, 0);
2657 if (!c)
2658 return -ENOMEM;
b57695fe 2659 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2660 scsi3addr, cmd_type);
5390cfc3 2661 if (return_status == IO_OK)
789a424a 2662 return_status = sendcmd_withirq_core(h, c, 1);
2663
1da177e4 2664 cmd_free(h, c, 0);
7c832835 2665 return return_status;
1da177e4 2666}
7c832835 2667
1da177e4 2668static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2669 int withirq, sector_t total_size,
7c832835
BH		 2670 unsigned int block_size,
2671 InquiryData_struct *inq_buff,
2672 drive_info_struct *drv)
1da177e4
LT		 2673{
2674 int return_code;
00988a35 2675 unsigned long t;
b57695fe 2676 unsigned char scsi3addr[8];
00988a35 2677
1da177e4 2678 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2679 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2680 if (withirq)
2681 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2682 inq_buff, sizeof(*inq_buff),
2683 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2684 else
2685 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2686 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2687 TYPE_CMD);
1da177e4 2688 if (return_code == IO_OK) {
7c832835 2689 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2690 printk(KERN_WARNING
7c832835
BH		 2691 "cciss: reading geometry failed, volume "
2692 "does not support reading geometry\n");
1da177e4 2693 drv->heads = 255;
7c832835 2694 drv->sectors = 32; // Sectors per track
7f42d3b8 2695 drv->cylinders = total_size + 1;
89f97ad1 2696 drv->raid_level = RAID_UNKNOWN;
1da177e4 2697 } else {
1da177e4
LT		 2698 drv->heads = inq_buff->data_byte[6];
2699 drv->sectors = inq_buff->data_byte[7];
2700 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2701 drv->cylinders += inq_buff->data_byte[5];
2702 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2703 }
2704 drv->block_size = block_size;
97c06978 2705 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2706 t = drv->heads * drv->sectors;
2707 if (t > 1) {
97c06978
MMOD		 2708 sector_t real_size = total_size + 1;
2709 unsigned long rem = sector_div(real_size, t);
3f7705ea 2710 if (rem)
97c06978
MMOD		 2711 real_size++;
2712 drv->cylinders = real_size;
1da177e4 2713 }
7c832835 2714 } else { /* Get geometry failed */
1da177e4
LT		 2715 printk(KERN_WARNING "cciss: reading geometry failed\n");
2716 }
1da177e4 2717}
7c832835 2718
1da177e4 2719static void
00988a35 2720cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2721 unsigned int *block_size)
1da177e4 2722{
00988a35 2723 ReadCapdata_struct *buf;
1da177e4 2724 int return_code;
b57695fe 2725 unsigned char scsi3addr[8];
1aebe187
MK		 2726
2727 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2728 if (!buf) {
00988a35
MMOD		 2729 printk(KERN_WARNING "cciss: out of memory\n");
2730 return;
2731 }
1aebe187 2732
b57695fe 2733 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2734 if (withirq)
2735 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2736 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2737 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2738 else
2739 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2740 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2741 0, scsi3addr, TYPE_CMD);
1da177e4 2742 if (return_code == IO_OK) {
4c1f2b31
AV		 2743 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2744 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2745 } else { /* read capacity command failed */
1da177e4
LT		 2746 printk(KERN_WARNING "cciss: read capacity failed\n");
2747 *total_size = 0;
2748 *block_size = BLOCK_SIZE;
2749 }
00988a35 2750 kfree(buf);
00988a35
MMOD		 2751}
2752
2753static void
2754cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2755{
2756 ReadCapdata_struct_16 *buf;
2757 int return_code;
b57695fe 2758 unsigned char scsi3addr[8];
1aebe187
MK		 2759
2760 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2761 if (!buf) {
00988a35
MMOD		 2762 printk(KERN_WARNING "cciss: out of memory\n");
2763 return;
2764 }
1aebe187 2765
b57695fe 2766 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2767 if (withirq) {
2768 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2769 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2770 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2771 }
2772 else {
2773 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2774 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2775 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2776 }
2777 if (return_code == IO_OK) {
4c1f2b31
AV		 2778 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2779 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2780 } else { /* read capacity command failed */
2781 printk(KERN_WARNING "cciss: read capacity failed\n");
2782 *total_size = 0;
2783 *block_size = BLOCK_SIZE;
2784 }
7b92aadf 2785 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2786 (unsigned long long)*total_size+1, *block_size);
00988a35 2787 kfree(buf);
1da177e4
LT		 2788}
2789
1da177e4
LT		 2790static int cciss_revalidate(struct gendisk *disk)
2791{
2792 ctlr_info_t *h = get_host(disk);
2793 drive_info_struct *drv = get_drv(disk);
2794 int logvol;
7c832835 2795 int FOUND = 0;
1da177e4 2796 unsigned int block_size;
00988a35 2797 sector_t total_size;
1da177e4
LT		 2798 InquiryData_struct *inq_buff = NULL;
2799
7c832835 2800 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
9cef0d2f 2801 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2802 sizeof(drv->LunID)) == 0) {
7c832835 2803 FOUND = 1;
1da177e4
LT		 2804 break;
2805 }
2806 }
2807
7c832835
BH		 2808 if (!FOUND)
2809 return 1;
1da177e4 2810
7c832835
BH		 2811 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2812 if (inq_buff == NULL) {
2813 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2814 return 1;
2815 }
00988a35
MMOD		 2816 if (h->cciss_read == CCISS_READ_10) {
2817 cciss_read_capacity(h->ctlr, logvol, 1,
2818 &total_size, &block_size);
2819 } else {
2820 cciss_read_capacity_16(h->ctlr, logvol, 1,
2821 &total_size, &block_size);
2822 }
7c832835
BH		 2823 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2824 inq_buff, drv);
1da177e4 2825
e1defc4f 2826 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2827 set_capacity(disk, drv->nr_blocks);
2828
1da177e4
LT		 2829 kfree(inq_buff);
2830 return 0;
2831}
2832
2833/*
2834 * Wait polling for a command to complete.
2835 * The memory mapped FIFO is polled for the completion.
2836 * Used only at init time, interrupts from the HBA are disabled.
2837 */
2838static unsigned long pollcomplete(int ctlr)
2839{
2840 unsigned long done;
2841 int i;
2842
2843 /* Wait (up to 20 seconds) for a command to complete */
2844
2845 for (i = 20 * HZ; i > 0; i--) {
2846 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2847 if (done == FIFO_EMPTY)
2848 schedule_timeout_uninterruptible(1);
2849 else
e2019b58 2850 return done;
1da177e4
LT		 2851 }
2852 /* Invalid address to tell caller we ran out of time */
2853 return 1;
2854}
3da8b713 2855
4a4b2d76
SC		 2856/* Send command c to controller h and poll for it to complete.
2857 * Turns interrupts off on the board. Used at driver init time
2858 * and during SCSI error recovery.
1da177e4 2859 */
4a4b2d76 2860static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2861{
1da177e4
LT		 2862 int i;
2863 unsigned long complete;
4a4b2d76 2864 int status = IO_ERROR;
1da177e4 2865 u64bit buff_dma_handle;
1da177e4 2866
4a4b2d76
SC		 2867resend_cmd1:
2868
2869 /* Disable interrupt on the board. */
2870 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2871
1da177e4 2872 /* Make sure there is room in the command FIFO */
7c832835 2873 /* Actually it should be completely empty at this time */
3da8b713 2874 /* unless we are in here doing error handling for the scsi */
2875 /* tape side of the driver. */
7c832835 2876 for (i = 200000; i > 0; i--) {
1da177e4 2877 /* if fifo isn't full go */
4a4b2d76 2878 if (!(h->access.fifo_full(h)))
7c832835 2879 break;
7c832835
BH		 2880 udelay(10);
2881 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2882 " waiting!\n", h->ctlr);
7c832835 2883 }
4a4b2d76 2884 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2885 do {
4a4b2d76 2886 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2887
2888#ifdef CCISS_DEBUG
3da8b713 2889 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2890#endif /* CCISS_DEBUG */
1da177e4 2891
3da8b713 2892 if (complete == 1) {
7c832835
BH		 2893 printk(KERN_WARNING
2894 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2895 "No command list address returned!\n", h->ctlr);
3da8b713 2896 status = IO_ERROR;
3da8b713 2897 break;
2898 }
2899
72f9f132 2900 /* Make sure it's the command we're expecting. */
4a4b2d76 2901 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2902 printk(KERN_WARNING "cciss%d: Unexpected command "
2903 "completion.\n", h->ctlr);
4a4b2d76
SC		 2904 continue;
2905 }
2906
2907 /* It is our command. If no error, we're done. */
2908 if (!(complete & CISS_ERROR_BIT)) {
2909 status = IO_OK;
2910 break;
2911 }
2912
2913 /* There is an error... */
2914
2915 /* if data overrun or underun on Report command ignore it */
2916 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2917 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2918 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2919 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2920 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2921 complete = c->busaddr;
2922 status = IO_OK;
2923 break;
1da177e4 2924 }
4a4b2d76
SC		 2925
2926 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2927 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2928 h->ctlr, c);
2929 if (c->retry_count < MAX_CMD_RETRIES) {
2930 printk(KERN_WARNING "cciss%d: retrying %p\n",
2931 h->ctlr, c);
2932 c->retry_count++;
2933 /* erase the old error information */
2934 memset(c->err_info, 0, sizeof(c->err_info));
2935 goto resend_cmd1;
3da8b713 2936 }
4a4b2d76
SC		 2937 printk(KERN_WARNING "cciss%d: retried %p too many "
2938 "times\n", h->ctlr, c);
2939 status = IO_ERROR;
3c2ab402 2940 break;
4a4b2d76
SC		 2941 }
2942
2943 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2944 printk(KERN_WARNING "cciss%d: command could not be "
2945 "aborted.\n", h->ctlr);
2946 status = IO_ERROR;
3c2ab402 2947 break;
4a4b2d76
SC		 2948 }
2949
4a4b2d76 2950 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2951 status = check_target_status(h, c);
2952 break;
4a4b2d76
SC		 2953 }
2954
3c2ab402 2955 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2956 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2957 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2958 status = IO_ERROR;
3c2ab402 2959 break;
4a4b2d76
SC		 2960
2961 } while (1);
7c832835 2962
1da177e4 2963 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2964 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2965 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2966 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2967 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2968 return status;
2969}
2970
2971/*
2972 * Send a command to the controller, and wait for it to complete.
2973 * Used at init time, and during SCSI error recovery.
2974 */
2975static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2976 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2977{
2978 CommandList_struct *c;
2979 int status;
2980
2981 c = cmd_alloc(hba[ctlr], 1);
2982 if (!c) {
2983 printk(KERN_WARNING "cciss: unable to get memory");
2984 return IO_ERROR;
2985 }
b57695fe 2986 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2987 scsi3addr, cmd_type);
4a4b2d76
SC		 2988 if (status == IO_OK)
2989 status = sendcmd_core(hba[ctlr], c);
2990 cmd_free(hba[ctlr], c, 1);
e2019b58 2991 return status;
7c832835
BH		 2992}
2993
1da177e4
LT		 2994/*
2995 * Map (physical) PCI mem into (virtual) kernel space
2996 */
2997static void __iomem *remap_pci_mem(ulong base, ulong size)
2998{
7c832835
BH		 2999 ulong page_base = ((ulong) base) & PAGE_MASK;
3000 ulong page_offs = ((ulong) base) - page_base;
3001 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 3002
7c832835 3003 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 3004}
3005
7c832835
BH		 3006/*
3007 * Takes jobs of the Q and sends them to the hardware, then puts it on
3008 * the Q to wait for completion.
3009 */
3010static void start_io(ctlr_info_t *h)
1da177e4
LT		 3011{
3012 CommandList_struct *c;
7c832835 3013
8a3173de
JA		 3014 while (!hlist_empty(&h->reqQ)) {
3015 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 3016 /* can't do anything if fifo is full */
3017 if ((h->access.fifo_full(h))) {
3018 printk(KERN_WARNING "cciss: fifo full\n");
3019 break;
3020 }
3021
7c832835 3022 /* Get the first entry from the Request Q */
8a3173de 3023 removeQ(c);
1da177e4 3024 h->Qdepth--;
7c832835
BH		 3025
3026 /* Tell the controller execute command */
1da177e4 3027 h->access.submit_command(h, c);
7c832835
BH		 3028
3029 /* Put job onto the completed Q */
8a3173de 3030 addQ(&h->cmpQ, c);
1da177e4
LT		 3031 }
3032}
7c832835 3033
1da177e4
LT		 3034/* Assumes that CCISS_LOCK(h->ctlr) is held. */
3035/* Zeros out the error record and then resends the command back */
3036/* to the controller */
7c832835 3037static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 3038{
3039 /* erase the old error information */
3040 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
3041
3042 /* add it to software queue and then send it to the controller */
8a3173de 3043 addQ(&h->reqQ, c);
1da177e4 3044 h->Qdepth++;
7c832835 3045 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 3046 h->maxQsinceinit = h->Qdepth;
3047
3048 start_io(h);
3049}
a9925a06 3050
1a614f50
SC		 3051static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
3052 unsigned int msg_byte, unsigned int host_byte,
3053 unsigned int driver_byte)
3054{
3055 /* inverse of macros in scsi.h */
3056 return (scsi_status_byte & 0xff) |
3057 ((msg_byte & 0xff) << 8) |
3058 ((host_byte & 0xff) << 16) |
3059 ((driver_byte & 0xff) << 24);
3060}
3061
0a9279cc
MM		 3062static inline int evaluate_target_status(ctlr_info_t *h,
3063 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 3064{
3065 unsigned char sense_key;
1a614f50
SC		 3066 unsigned char status_byte, msg_byte, host_byte, driver_byte;
3067 int error_value;
3068
0a9279cc 3069 *retry_cmd = 0;
1a614f50
SC		 3070 /* If we get in here, it means we got "target status", that is, scsi status */
3071 status_byte = cmd->err_info->ScsiStatus;
3072 driver_byte = DRIVER_OK;
3073 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
3074
3075 if (blk_pc_request(cmd->rq))
3076 host_byte = DID_PASSTHROUGH;
3077 else
3078 host_byte = DID_OK;
3079
3080 error_value = make_status_bytes(status_byte, msg_byte,
3081 host_byte, driver_byte);
03bbfee5 3082
1a614f50 3083 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 3084 if (!blk_pc_request(cmd->rq))
3085 printk(KERN_WARNING "cciss: cmd %p "
3086 "has SCSI Status 0x%x\n",
3087 cmd, cmd->err_info->ScsiStatus);
1a614f50 3088 return error_value;
03bbfee5
MMOD		 3089 }
3090
3091 /* check the sense key */
3092 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3093 /* no status or recovered error */
1a614f50
SC		 3094 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
3095 error_value = 0;
03bbfee5 3096
0a9279cc
MM		 3097 if (check_for_unit_attention(h, cmd)) {
3098 *retry_cmd = !blk_pc_request(cmd->rq);
3099 return 0;
3100 }
3101
03bbfee5 3102 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 3103 if (error_value != 0)
03bbfee5
MMOD		 3104 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3105 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3106 return error_value;
03bbfee5
MMOD		 3107 }
3108
3109 /* SG_IO or similar, copy sense data back */
3110 if (cmd->rq->sense) {
3111 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3112 cmd->rq->sense_len = cmd->err_info->SenseLen;
3113 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3114 cmd->rq->sense_len);
3115 } else
3116 cmd->rq->sense_len = 0;
3117
1a614f50 3118 return error_value;
03bbfee5
MMOD		 3119}
3120
7c832835 3121/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3122 * buffers for the completed job. Note that this function does not need
3123 * to hold the hba/queue lock.
7c832835
BH		 3124 */
3125static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3126 int timeout)
1da177e4 3127{
1da177e4 3128 int retry_cmd = 0;
198b7660
MMOD		 3129 struct request *rq = cmd->rq;
3130
3131 rq->errors = 0;
7c832835 3132
1da177e4 3133 if (timeout)
1a614f50 3134 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3135
d38ae168
MMOD		 3136 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3137 goto after_error_processing;
7c832835 3138
d38ae168 3139 switch (cmd->err_info->CommandStatus) {
d38ae168 3140 case CMD_TARGET_STATUS:
0a9279cc 3141 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3142 break;
3143 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3144 if (blk_fs_request(cmd->rq)) {
3145 printk(KERN_WARNING "cciss: cmd %p has"
3146 " completed with data underrun "
3147 "reported\n", cmd);
c3a4d78c 3148 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3149 }
d38ae168
MMOD		 3150 break;
3151 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3152 if (blk_fs_request(cmd->rq))
3153 printk(KERN_WARNING "cciss: cmd %p has"
3154 " completed with data overrun "
3155 "reported\n", cmd);
d38ae168
MMOD		 3156 break;
3157 case CMD_INVALID:
3158 printk(KERN_WARNING "cciss: cmd %p is "
3159 "reported invalid\n", cmd);
1a614f50
SC		 3160 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3161 cmd->err_info->CommandStatus, DRIVER_OK,
3162 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3163 break;
3164 case CMD_PROTOCOL_ERR:
3165 printk(KERN_WARNING "cciss: cmd %p has "
3166 "protocol error \n", cmd);
1a614f50
SC		 3167 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3168 cmd->err_info->CommandStatus, DRIVER_OK,
3169 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3170 break;
3171 case CMD_HARDWARE_ERR:
3172 printk(KERN_WARNING "cciss: cmd %p had "
3173 " hardware error\n", cmd);
1a614f50
SC		 3174 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3175 cmd->err_info->CommandStatus, DRIVER_OK,
3176 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3177 break;
3178 case CMD_CONNECTION_LOST:
3179 printk(KERN_WARNING "cciss: cmd %p had "
3180 "connection lost\n", cmd);
1a614f50
SC		 3181 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3182 cmd->err_info->CommandStatus, DRIVER_OK,
3183 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3184 break;
3185 case CMD_ABORTED:
3186 printk(KERN_WARNING "cciss: cmd %p was "
3187 "aborted\n", cmd);
1a614f50
SC		 3188 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3189 cmd->err_info->CommandStatus, DRIVER_OK,
3190 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3191 break;
3192 case CMD_ABORT_FAILED:
3193 printk(KERN_WARNING "cciss: cmd %p reports "
3194 "abort failed\n", cmd);
1a614f50
SC		 3195 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3196 cmd->err_info->CommandStatus, DRIVER_OK,
3197 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3198 break;
3199 case CMD_UNSOLICITED_ABORT:
3200 printk(KERN_WARNING "cciss%d: unsolicited "
3201 "abort %p\n", h->ctlr, cmd);
3202 if (cmd->retry_count < MAX_CMD_RETRIES) {
3203 retry_cmd = 1;
3204 printk(KERN_WARNING
3205 "cciss%d: retrying %p\n", h->ctlr, cmd);
3206 cmd->retry_count++;
3207 } else
3208 printk(KERN_WARNING
3209 "cciss%d: %p retried too "
3210 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3211 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3212 cmd->err_info->CommandStatus, DRIVER_OK,
3213 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3214 break;
3215 case CMD_TIMEOUT:
3216 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3217 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3218 cmd->err_info->CommandStatus, DRIVER_OK,
3219 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3220 break;
3221 default:
3222 printk(KERN_WARNING "cciss: cmd %p returned "
3223 "unknown status %x\n", cmd,
3224 cmd->err_info->CommandStatus);
1a614f50
SC		 3225 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3226 cmd->err_info->CommandStatus, DRIVER_OK,
3227 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3228 }
d38ae168
MMOD		 3229
3230after_error_processing:
3231
1da177e4 3232 /* We need to return this command */
7c832835
BH		 3233 if (retry_cmd) {
3234 resend_cciss_cmd(h, cmd);
1da177e4 3235 return;
7c832835 3236 }
03bbfee5 3237 cmd->rq->completion_data = cmd;
a9925a06 3238 blk_complete_request(cmd->rq);
1da177e4
LT		 3239}
3240
7c832835
BH		 3241/*
3242 * Get a request and submit it to the controller.
1da177e4 3243 */
165125e1 3244static void do_cciss_request(struct request_queue *q)
1da177e4 3245{
7c832835 3246 ctlr_info_t *h = q->queuedata;
1da177e4 3247 CommandList_struct *c;
00988a35
MMOD		 3248 sector_t start_blk;
3249 int seg;
1da177e4
LT		 3250 struct request *creq;
3251 u64bit temp64;
3252 struct scatterlist tmp_sg[MAXSGENTRIES];
3253 drive_info_struct *drv;
3254 int i, dir;
3255
3256 /* We call start_io here in case there is a command waiting on the
3257 * queue that has not been sent.
7c832835 3258 */
1da177e4
LT		 3259 if (blk_queue_plugged(q))
3260 goto startio;
3261
7c832835 3262 queue:
9934c8c0 3263 creq = blk_peek_request(q);
1da177e4
LT		 3264 if (!creq)
3265 goto startio;
3266
089fe1b2 3267 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3268
7c832835 3269 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3270 goto full;
3271
9934c8c0 3272 blk_start_request(creq);
1da177e4
LT		 3273
3274 spin_unlock_irq(q->queue_lock);
3275
3276 c->cmd_type = CMD_RWREQ;
3277 c->rq = creq;
7c832835
BH		 3278
3279 /* fill in the request */
1da177e4 3280 drv = creq->rq_disk->private_data;
7c832835 3281 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3282 /* got command from pool, so use the command block index instead */
3283 /* for direct lookups. */
3284 /* The first 2 bits are reserved for controller error reporting. */
3285 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3286 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3287 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
7c832835
BH		 3288 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3289 c->Request.Type.Type = TYPE_CMD; // It is a command.
3290 c->Request.Type.Attribute = ATTR_SIMPLE;
3291 c->Request.Type.Direction =
a52de245 3292 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3293 c->Request.Timeout = 0; // Don't time out
3294 c->Request.CDB[0] =
00988a35 3295 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3296 start_blk = blk_rq_pos(creq);
1da177e4 3297#ifdef CCISS_DEBUG
83096ebf
TH		 3298 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3299 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3300#endif /* CCISS_DEBUG */
1da177e4 3301
45711f1a 3302 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3303 seg = blk_rq_map_sg(q, creq, tmp_sg);
3304
7c832835 3305 /* get the DMA records for the setup */
1da177e4
LT		 3306 if (c->Request.Type.Direction == XFER_READ)
3307 dir = PCI_DMA_FROMDEVICE;
3308 else
3309 dir = PCI_DMA_TODEVICE;
3310
7c832835 3311 for (i = 0; i < seg; i++) {
1da177e4 3312 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3313 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3314 tmp_sg[i].offset,
3315 tmp_sg[i].length, dir);
1da177e4 3316 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3317 c->SG[i].Addr.upper = temp64.val32.upper;
3318 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3319 }
7c832835
BH		 3320 /* track how many SG entries we are using */
3321 if (seg > h->maxSG)
3322 h->maxSG = seg;
1da177e4
LT		 3323
3324#ifdef CCISS_DEBUG
83096ebf
TH		 3325 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3326 blk_rq_sectors(creq), seg);
7c832835 3327#endif /* CCISS_DEBUG */
1da177e4
LT		 3328
3329 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3330 if (likely(blk_fs_request(creq))) {
3331 if(h->cciss_read == CCISS_READ_10) {
3332 c->Request.CDB[1] = 0;
3333 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3334 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3335 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3336 c->Request.CDB[5] = start_blk & 0xff;
3337 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3338 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3339 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3340 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3341 } else {
582539e5
RD		 3342 u32 upper32 = upper_32_bits(start_blk);
3343
03bbfee5
MMOD		 3344 c->Request.CDBLen = 16;
3345 c->Request.CDB[1]= 0;
582539e5
RD		 3346 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3347 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3348 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3349 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3350 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3351 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3352 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3353 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3354 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3355 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3356 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3357 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3358 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3359 }
3360 } else if (blk_pc_request(creq)) {
3361 c->Request.CDBLen = creq->cmd_len;
3362 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3363 } else {
03bbfee5
MMOD		 3364 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3365 BUG();
00988a35 3366 }
1da177e4
LT		 3367
3368 spin_lock_irq(q->queue_lock);
3369
8a3173de 3370 addQ(&h->reqQ, c);
1da177e4 3371 h->Qdepth++;
7c832835
BH		 3372 if (h->Qdepth > h->maxQsinceinit)
3373 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3374
3375 goto queue;
00988a35 3376full:
1da177e4 3377 blk_stop_queue(q);
00988a35 3378startio:
1da177e4
LT		 3379 /* We will already have the driver lock here so not need
3380 * to lock it.
7c832835 3381 */
1da177e4
LT		 3382 start_io(h);
3383}
3384
3da8b713 3385static inline unsigned long get_next_completion(ctlr_info_t *h)
3386{
3da8b713 3387 return h->access.command_completed(h);
3da8b713 3388}
3389
3390static inline int interrupt_pending(ctlr_info_t *h)
3391{
3da8b713 3392 return h->access.intr_pending(h);
3da8b713 3393}
3394
3395static inline long interrupt_not_for_us(ctlr_info_t *h)
3396{
7c832835 3397 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3398 (h->interrupts_enabled == 0)));
3da8b713 3399}
3400
7d12e780 3401static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3402{
3403 ctlr_info_t *h = dev_id;
3404 CommandList_struct *c;
3405 unsigned long flags;
33079b21 3406 __u32 a, a1, a2;
1da177e4 3407
3da8b713 3408 if (interrupt_not_for_us(h))
1da177e4 3409 return IRQ_NONE;
1da177e4
LT		 3410 /*
3411 * If there are completed commands in the completion queue,
3412 * we had better do something about it.
3413 */
3414 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3415 while (interrupt_pending(h)) {
7c832835 3416 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3417 a1 = a;
33079b21
MM		 3418 if ((a & 0x04)) {
3419 a2 = (a >> 3);
f880632f 3420 if (a2 >= h->nr_cmds) {
7c832835
BH		 3421 printk(KERN_WARNING
3422 "cciss: controller cciss%d failed, stopping.\n",
3423 h->ctlr);
33079b21
MM		 3424 fail_all_cmds(h->ctlr);
3425 return IRQ_HANDLED;
3426 }
3427
3428 c = h->cmd_pool + a2;
3429 a = c->busaddr;
3430
3431 } else {
8a3173de
JA		 3432 struct hlist_node *tmp;
3433
7c832835 3434 a &= ~3;
8a3173de
JA		 3435 c = NULL;
3436 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3437 if (c->busaddr == a)
7c832835
BH		 3438 break;
3439 }
33079b21 3440 }
1da177e4
LT		 3441 /*
3442 * If we've found the command, take it off the
3443 * completion Q and free it
3444 */
8a3173de
JA		 3445 if (c && c->busaddr == a) {
3446 removeQ(c);
1da177e4
LT		 3447 if (c->cmd_type == CMD_RWREQ) {
3448 complete_command(h, c, 0);
3449 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3450 complete(c->waiting);
3451 }
3452# ifdef CONFIG_CISS_SCSI_TAPE
3453 else if (c->cmd_type == CMD_SCSI)
3454 complete_scsi_command(c, 0, a1);
3455# endif
3456 continue;
3457 }
3458 }
3459 }
3460
1da177e4
LT		 3461 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3462 return IRQ_HANDLED;
3463}
7c832835 3464
b368c9dd
AP		 3465/**
3466 * add_to_scan_list() - add controller to rescan queue
3467 * @h: Pointer to the controller.
3468 *
3469 * Adds the controller to the rescan queue if not already on the queue.
3470 *
3471 * returns 1 if added to the queue, 0 if skipped (could be on the
3472 * queue already, or the controller could be initializing or shutting
3473 * down).
3474 **/
3475static int add_to_scan_list(struct ctlr_info *h)
3476{
3477 struct ctlr_info *test_h;
3478 int found = 0;
3479 int ret = 0;
3480
3481 if (h->busy_initializing)
3482 return 0;
3483
3484 if (!mutex_trylock(&h->busy_shutting_down))
3485 return 0;
3486
3487 mutex_lock(&scan_mutex);
3488 list_for_each_entry(test_h, &scan_q, scan_list) {
3489 if (test_h == h) {
3490 found = 1;
3491 break;
3492 }
3493 }
3494 if (!found && !h->busy_scanning) {
3495 INIT_COMPLETION(h->scan_wait);
3496 list_add_tail(&h->scan_list, &scan_q);
3497 ret = 1;
3498 }
3499 mutex_unlock(&scan_mutex);
3500 mutex_unlock(&h->busy_shutting_down);
3501
3502 return ret;
3503}
3504
3505/**
3506 * remove_from_scan_list() - remove controller from rescan queue
3507 * @h: Pointer to the controller.
3508 *
3509 * Removes the controller from the rescan queue if present. Blocks if
3510 * the controller is currently conducting a rescan.
3511 **/
3512static void remove_from_scan_list(struct ctlr_info *h)
3513{
3514 struct ctlr_info *test_h, *tmp_h;
3515 int scanning = 0;
3516
3517 mutex_lock(&scan_mutex);
3518 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3519 if (test_h == h) {
3520 list_del(&h->scan_list);
3521 complete_all(&h->scan_wait);
3522 mutex_unlock(&scan_mutex);
3523 return;
3524 }
3525 }
3526 if (&h->busy_scanning)
3527 scanning = 0;
3528 mutex_unlock(&scan_mutex);
3529
3530 if (scanning)
3531 wait_for_completion(&h->scan_wait);
3532}
3533
3534/**
3535 * scan_thread() - kernel thread used to rescan controllers
3536 * @data: Ignored.
3537 *
3538 * A kernel thread used scan for drive topology changes on
3539 * controllers. The thread processes only one controller at a time
3540 * using a queue. Controllers are added to the queue using
3541 * add_to_scan_list() and removed from the queue either after done
3542 * processing or using remove_from_scan_list().
3543 *
3544 * returns 0.
3545 **/
0a9279cc
MM		 3546static int scan_thread(void *data)
3547{
b368c9dd 3548 struct ctlr_info *h;
0a9279cc 3549
b368c9dd
AP		 3550 while (1) {
3551 set_current_state(TASK_INTERRUPTIBLE);
3552 schedule();
0a9279cc
MM		 3553 if (kthread_should_stop())
3554 break;
b368c9dd
AP		 3555
3556 while (1) {
3557 mutex_lock(&scan_mutex);
3558 if (list_empty(&scan_q)) {
3559 mutex_unlock(&scan_mutex);
3560 break;
3561 }
3562
3563 h = list_entry(scan_q.next,
3564 struct ctlr_info,
3565 scan_list);
3566 list_del(&h->scan_list);
3567 h->busy_scanning = 1;
3568 mutex_unlock(&scan_mutex);
3569
3570 if (h) {
2d11d993 3571 rebuild_lun_table(h, 0, 0);
b368c9dd
AP		 3572 complete_all(&h->scan_wait);
3573 mutex_lock(&scan_mutex);
3574 h->busy_scanning = 0;
3575 mutex_unlock(&scan_mutex);
3576 }
3577 }
0a9279cc 3578 }
b368c9dd 3579
0a9279cc
MM		 3580 return 0;
3581}
3582
3583static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3584{
3585 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3586 return 0;
3587
3588 switch (c->err_info->SenseInfo[12]) {
3589 case STATE_CHANGED:
3590 printk(KERN_WARNING "cciss%d: a state change "
3591 "detected, command retried\n", h->ctlr);
3592 return 1;
3593 break;
3594 case LUN_FAILED:
3595 printk(KERN_WARNING "cciss%d: LUN failure "
3596 "detected, action required\n", h->ctlr);
3597 return 1;
3598 break;
3599 case REPORT_LUNS_CHANGED:
3600 printk(KERN_WARNING "cciss%d: report LUN data "
3601 "changed\n", h->ctlr);
b368c9dd
AP		 3602 add_to_scan_list(h);
3603 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3604 return 1;
3605 break;
3606 case POWER_OR_RESET:
3607 printk(KERN_WARNING "cciss%d: a power on "
3608 "or device reset detected\n", h->ctlr);
3609 return 1;
3610 break;
3611 case UNIT_ATTENTION_CLEARED:
3612 printk(KERN_WARNING "cciss%d: unit attention "
3613 "cleared by another initiator\n", h->ctlr);
3614 return 1;
3615 break;
3616 default:
3617 printk(KERN_WARNING "cciss%d: unknown "
3618 "unit attention detected\n", h->ctlr);
3619 return 1;
3620 }
3621}
3622
7c832835 3623/*
d14c4ab5 3624 * We cannot read the structure directly, for portability we must use
1da177e4 3625 * the io functions.
7c832835 3626 * This is for debug only.
1da177e4
LT		 3627 */
3628#ifdef CCISS_DEBUG
7c832835 3629static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3630{
3631 int i;
3632 char temp_name[17];
3633
3634 printk("Controller Configuration information\n");
3635 printk("------------------------------------\n");
7c832835 3636 for (i = 0; i < 4; i++)
1da177e4 3637 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3638 temp_name[4] = '\0';
3639 printk(" Signature = %s\n", temp_name);
1da177e4 3640 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3641 printk(" Transport methods supported = 0x%x\n",
3642 readl(&(tb->TransportSupport)));
3643 printk(" Transport methods active = 0x%x\n",
3644 readl(&(tb->TransportActive)));
3645 printk(" Requested transport Method = 0x%x\n",
3646 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3647 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3648 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3649 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3650 readl(&(tb->HostWrite.CoalIntCount)));
3651 printk(" Max outstanding commands = 0x%d\n",
3652 readl(&(tb->CmdsOutMax)));
3653 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3654 for (i = 0; i < 16; i++)
1da177e4
LT		 3655 temp_name[i] = readb(&(tb->ServerName[i]));
3656 temp_name[16] = '\0';
3657 printk(" Server Name = %s\n", temp_name);
7c832835 3658 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3659}
7c832835 3660#endif /* CCISS_DEBUG */
1da177e4 3661
7c832835 3662static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3663{
3664 int i, offset, mem_type, bar_type;
7c832835 3665 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3666 return 0;
3667 offset = 0;
7c832835
BH		 3668 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3669 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3670 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3671 offset += 4;
3672 else {
3673 mem_type = pci_resource_flags(pdev, i) &
7c832835 3674 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3675 switch (mem_type) {
7c832835
BH		 3676 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3677 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3678 offset += 4; /* 32 bit */
3679 break;
3680 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3681 offset += 8;
3682 break;
3683 default: /* reserved in PCI 2.2 */
3684 printk(KERN_WARNING
3685 "Base address is invalid\n");
3686 return -1;
1da177e4
LT		 3687 break;
3688 }
3689 }
7c832835
BH		 3690 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3691 return i + 1;
1da177e4
LT		 3692 }
3693 return -1;
3694}
3695
fb86a35b
MM		 3696/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3697 * controllers that are capable. If not, we use IO-APIC mode.
3698 */
3699
7c832835
BH		 3700static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3701 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3702{
3703#ifdef CONFIG_PCI_MSI
7c832835
BH		 3704 int err;
3705 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3706 {0, 2}, {0, 3}
3707 };
fb86a35b
MM		 3708
3709 /* Some boards advertise MSI but don't really support it */
3710 if ((board_id == 0x40700E11) ||
7c832835
BH		 3711 (board_id == 0x40800E11) ||
3712 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3713 goto default_int_mode;
3714
7c832835
BH		 3715 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3716 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3717 if (!err) {
3718 c->intr[0] = cciss_msix_entries[0].vector;
3719 c->intr[1] = cciss_msix_entries[1].vector;
3720 c->intr[2] = cciss_msix_entries[2].vector;
3721 c->intr[3] = cciss_msix_entries[3].vector;
3722 c->msix_vector = 1;
3723 return;
3724 }
3725 if (err > 0) {
3726 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3727 "available\n", err);
1ecb9c0f 3728 goto default_int_mode;
7c832835
BH		 3729 } else {
3730 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3731 err);
1ecb9c0f 3732 goto default_int_mode;
7c832835
BH		 3733 }
3734 }
3735 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3736 if (!pci_enable_msi(pdev)) {
7c832835 3737 c->msi_vector = 1;
7c832835
BH		 3738 } else {
3739 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3740 }
3741 }
1ecb9c0f 3742default_int_mode:
7c832835 3743#endif /* CONFIG_PCI_MSI */
fb86a35b 3744 /* if we get here we're going to use the default interrupt mode */
7c832835 3745 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3746 return;
3747}
3748
7d1fd970 3749static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3750{
3751 ushort subsystem_vendor_id, subsystem_device_id, command;
3752 __u32 board_id, scratchpad = 0;
3753 __u64 cfg_offset;
3754 __u32 cfg_base_addr;
3755 __u64 cfg_base_addr_index;
c33ac89b 3756 int i, err;
1da177e4
LT		 3757
3758 /* check to see if controller has been disabled */
3759 /* BEFORE trying to enable it */
7c832835
BH		 3760 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3761 if (!(command & 0x02)) {
3762 printk(KERN_WARNING
3763 "cciss: controller appears to be disabled\n");
c33ac89b 3764 return -ENODEV;
1da177e4
LT		 3765 }
3766
c33ac89b 3767 err = pci_enable_device(pdev);
7c832835 3768 if (err) {
1da177e4 3769 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3770 return err;
1da177e4 3771 }
1da177e4 3772
4e570309
BH		 3773 err = pci_request_regions(pdev, "cciss");
3774 if (err) {
3775 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3776 "aborting\n");
872225ca 3777 return err;
4e570309
BH		 3778 }
3779
1da177e4
LT		 3780 subsystem_vendor_id = pdev->subsystem_vendor;
3781 subsystem_device_id = pdev->subsystem_device;
3782 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3783 subsystem_vendor_id);
1da177e4 3784
1da177e4
LT		 3785#ifdef CCISS_DEBUG
3786 printk("command = %x\n", command);
3787 printk("irq = %x\n", pdev->irq);
3788 printk("board_id = %x\n", board_id);
7c832835 3789#endif /* CCISS_DEBUG */
1da177e4 3790
fb86a35b
MM		 3791/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3792 * else we use the IO-APIC interrupt assigned to us by system ROM.
3793 */
3794 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3795
e1438581
MM		 3796 /* find the memory BAR */
3797 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3798 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3799 break;
3800 }
3801 if (i == DEVICE_COUNT_RESOURCE) {
3802 printk(KERN_WARNING "cciss: No memory BAR found\n");
3803 err = -ENODEV;
3804 goto err_out_free_res;
3805 }
3806
3807 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3808 * already removed
3809 */
1da177e4 3810
1da177e4 3811#ifdef CCISS_DEBUG
9f92f471 3812 printk("address 0 = %lx\n", c->paddr);
7c832835 3813#endif /* CCISS_DEBUG */
a5b92873 3814 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3815
3816 /* Wait for the board to become ready. (PCI hotplug needs this.)
3817 * We poll for up to 120 secs, once per 100ms. */
7c832835 3818 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3819 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3820 if (scratchpad == CCISS_FIRMWARE_READY)
3821 break;
3822 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3823 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3824 }
3825 if (scratchpad != CCISS_FIRMWARE_READY) {
3826 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3827 err = -ENODEV;
4e570309 3828 goto err_out_free_res;
1da177e4
LT		 3829 }
3830
3831 /* get the address index number */
3832 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3833 cfg_base_addr &= (__u32) 0x0000ffff;
3834#ifdef CCISS_DEBUG
3835 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3836#endif /* CCISS_DEBUG */
3837 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3838#ifdef CCISS_DEBUG
9f92f471
RD		 3839 printk("cfg base address index = %llx\n",
3840 (unsigned long long)cfg_base_addr_index);
7c832835 3841#endif /* CCISS_DEBUG */
1da177e4
LT		 3842 if (cfg_base_addr_index == -1) {
3843 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3844 err = -ENODEV;
4e570309 3845 goto err_out_free_res;
1da177e4
LT		 3846 }
3847
3848 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3849#ifdef CCISS_DEBUG
9f92f471 3850 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3851#endif /* CCISS_DEBUG */
3852 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3853 cfg_base_addr_index) +
3854 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3855 c->board_id = board_id;
3856
3857#ifdef CCISS_DEBUG
945f390f 3858 print_cfg_table(c->cfgtable);
7c832835 3859#endif /* CCISS_DEBUG */
1da177e4 3860
49153998
MM		 3861 /* Some controllers support Zero Memory Raid (ZMR).
3862 * When configured in ZMR mode the number of supported
3863 * commands drops to 64. So instead of just setting an
3864 * arbitrary value we make the driver a little smarter.
3865 * We read the config table to tell us how many commands
3866 * are supported on the controller then subtract 4 to
3867 * leave a little room for ioctl calls.
3868 */
3869 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3870 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3871 if (board_id == products[i].board_id) {
3872 c->product_name = products[i].product_name;
3873 c->access = *(products[i].access);
49153998 3874 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3875 break;
3876 }
3877 }
7c832835
BH		 3878 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3879 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3880 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3881 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3882 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3883 err = -ENODEV;
4e570309 3884 goto err_out_free_res;
1da177e4 3885 }
4ff9a9a4
MM		 3886 /* We didn't find the controller in our list. We know the
3887 * signature is valid. If it's an HP device let's try to
3888 * bind to the device and fire it up. Otherwise we bail.
3889 */
3890 if (i == ARRAY_SIZE(products)) {
3891 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3892 c->product_name = products[i-1].product_name;
3893 c->access = *(products[i-1].access);
49153998 3894 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3895 printk(KERN_WARNING "cciss: This is an unknown "
3896 "Smart Array controller.\n"
3897 "cciss: Please update to the latest driver "
3898 "available from www.hp.com.\n");
3899 } else {
3900 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3901 " to access the Smart Array controller %08lx\n"
3902 , (unsigned long)board_id);
3903 err = -ENODEV;
3904 goto err_out_free_res;
3905 }
3906 }
1da177e4 3907#ifdef CONFIG_X86
7c832835
BH		 3908 {
3909 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3910 __u32 prefetch;
3911 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3912 prefetch |= 0x100;
3913 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3914 }
1da177e4
LT		 3915#endif
3916
8bf50f71
MMOD		 3917 /* Disabling DMA prefetch and refetch for the P600.
3918 * An ASIC bug may result in accesses to invalid memory addresses.
3919 * We've disabled prefetch for some time now. Testing with XEN
3920 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3921 */
3922 if(board_id == 0x3225103C) {
3923 __u32 dma_prefetch;
8bf50f71 3924 __u32 dma_refetch;
f92e2f5f
MM		 3925 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3926 dma_prefetch |= 0x8000;
3927 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3928 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3929 dma_refetch |= 0x1;
3930 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3931 }
3932
1da177e4
LT		 3933#ifdef CCISS_DEBUG
3934 printk("Trying to put board into Simple mode\n");
7c832835 3935#endif /* CCISS_DEBUG */
1da177e4 3936 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3937 /* Update the field, and then ring the doorbell */
3938 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3939 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3940
3941 /* under certain very rare conditions, this can take awhile.
3942 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3943 * as we enter this code.) */
7c832835 3944 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3945 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3946 break;
3947 /* delay and try again */
3948 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3949 schedule_timeout(msecs_to_jiffies(1));
7c832835 3950 }
1da177e4
LT		 3951
3952#ifdef CCISS_DEBUG
7c832835
BH		 3953 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3954 readl(c->vaddr + SA5_DOORBELL));
3955#endif /* CCISS_DEBUG */
1da177e4 3956#ifdef CCISS_DEBUG
7c832835
BH		 3957 print_cfg_table(c->cfgtable);
3958#endif /* CCISS_DEBUG */
1da177e4 3959
7c832835 3960 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3961 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3962 " simple mode\n");
c33ac89b 3963 err = -ENODEV;
4e570309 3964 goto err_out_free_res;
1da177e4
LT		 3965 }
3966 return 0;
3967
5faad620 3968err_out_free_res:
872225ca
MM		 3969 /*
3970 * Deliberately omit pci_disable_device(): it does something nasty to
3971 * Smart Array controllers that pci_enable_device does not undo
3972 */
4e570309 3973 pci_release_regions(pdev);
c33ac89b 3974 return err;
1da177e4
LT		 3975}
3976
6ae5ce8e
MM		 3977/* Function to find the first free pointer into our hba[] array
3978 * Returns -1 if no free entries are left.
7c832835 3979 */
1da177e4
LT		 3980static int alloc_cciss_hba(void)
3981{
799202cb 3982 int i;
1da177e4 3983
7c832835 3984 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3985 if (!hba[i]) {
3986 ctlr_info_t *p;
f2912a12 3987
06ff37ff 3988 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3989 if (!p)
3990 goto Enomem;
1da177e4
LT		 3991 hba[i] = p;
3992 return i;
3993 }
3994 }
3995 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3996 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3997 return -1;
3998Enomem:
1da177e4 3999 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 4000 return -1;
4001}
4002
2c935593 4003static void free_hba(int n)
1da177e4 4004{
2c935593
SC		 4005 ctlr_info_t *h = hba[n];
4006 int i;
1da177e4 4007
2c935593
SC		 4008 hba[n] = NULL;
4009 for (i = 0; i < h->highest_lun + 1; i++)
4010 if (h->gendisk[i] != NULL)
4011 put_disk(h->gendisk[i]);
4012 kfree(h);
1da177e4
LT		 4013}
4014
82eb03cf
CC		 4015/* Send a message CDB to the firmware. */
4016static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
4017{
4018 typedef struct {
4019 CommandListHeader_struct CommandHeader;
4020 RequestBlock_struct Request;
4021 ErrDescriptor_struct ErrorDescriptor;
4022 } Command;
4023 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4024 Command *cmd;
4025 dma_addr_t paddr64;
4026 uint32_t paddr32, tag;
4027 void __iomem *vaddr;
4028 int i, err;
4029
4030 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4031 if (vaddr == NULL)
4032 return -ENOMEM;
4033
4034 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4035 CCISS commands, so they must be allocated from the lower 4GiB of
4036 memory. */
e930438c 4037 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 4038 if (err) {
4039 iounmap(vaddr);
4040 return -ENOMEM;
4041 }
4042
4043 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4044 if (cmd == NULL) {
4045 iounmap(vaddr);
4046 return -ENOMEM;
4047 }
4048
4049 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4050 although there's no guarantee, we assume that the address is at
4051 least 4-byte aligned (most likely, it's page-aligned). */
4052 paddr32 = paddr64;
4053
4054 cmd->CommandHeader.ReplyQueue = 0;
4055 cmd->CommandHeader.SGList = 0;
4056 cmd->CommandHeader.SGTotal = 0;
4057 cmd->CommandHeader.Tag.lower = paddr32;
4058 cmd->CommandHeader.Tag.upper = 0;
4059 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4060
4061 cmd->Request.CDBLen = 16;
4062 cmd->Request.Type.Type = TYPE_MSG;
4063 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4064 cmd->Request.Type.Direction = XFER_NONE;
4065 cmd->Request.Timeout = 0; /* Don't time out */
4066 cmd->Request.CDB[0] = opcode;
4067 cmd->Request.CDB[1] = type;
4068 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4069
4070 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4071 cmd->ErrorDescriptor.Addr.upper = 0;
4072 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4073
4074 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4075
4076 for (i = 0; i < 10; i++) {
4077 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4078 if ((tag & ~3) == paddr32)
4079 break;
4080 schedule_timeout_uninterruptible(HZ);
4081 }
4082
4083 iounmap(vaddr);
4084
4085 /* we leak the DMA buffer here ... no choice since the controller could
4086 still complete the command. */
4087 if (i == 10) {
4088 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4089 opcode, type);
4090 return -ETIMEDOUT;
4091 }
4092
4093 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4094
4095 if (tag & 2) {
4096 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4097 opcode, type);
4098 return -EIO;
4099 }
4100
4101 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4102 opcode, type);
4103 return 0;
4104}
4105
4106#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4107#define cciss_noop(p) cciss_message(p, 3, 0)
4108
4109static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4110{
4111/* the #defines are stolen from drivers/pci/msi.h. */
4112#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4113#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4114
4115 int pos;
4116 u16 control = 0;
4117
4118 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4119 if (pos) {
4120 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4121 if (control & PCI_MSI_FLAGS_ENABLE) {
4122 printk(KERN_INFO "cciss: resetting MSI\n");
4123 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4124 }
4125 }
4126
4127 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4128 if (pos) {
4129 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4130 if (control & PCI_MSIX_FLAGS_ENABLE) {
4131 printk(KERN_INFO "cciss: resetting MSI-X\n");
4132 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4133 }
4134 }
4135
4136 return 0;
4137}
4138
4139/* This does a hard reset of the controller using PCI power management
4140 * states. */
4141static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4142{
4143 u16 pmcsr, saved_config_space[32];
4144 int i, pos;
4145
4146 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4147
4148 /* This is very nearly the same thing as
4149
4150 pci_save_state(pci_dev);
4151 pci_set_power_state(pci_dev, PCI_D3hot);
4152 pci_set_power_state(pci_dev, PCI_D0);
4153 pci_restore_state(pci_dev);
4154
4155 but we can't use these nice canned kernel routines on
4156 kexec, because they also check the MSI/MSI-X state in PCI
4157 configuration space and do the wrong thing when it is
4158 set/cleared. Also, the pci_save/restore_state functions
4159 violate the ordering requirements for restoring the
4160 configuration space from the CCISS document (see the
4161 comment below). So we roll our own .... */
4162
4163 for (i = 0; i < 32; i++)
4164 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4165
4166 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4167 if (pos == 0) {
4168 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4169 return -ENODEV;
4170 }
4171
4172 /* Quoting from the Open CISS Specification: "The Power
4173 * Management Control/Status Register (CSR) controls the power
4174 * state of the device. The normal operating state is D0,
4175 * CSR=00h. The software off state is D3, CSR=03h. To reset
4176 * the controller, place the interface device in D3 then to
4177 * D0, this causes a secondary PCI reset which will reset the
4178 * controller." */
4179
4180 /* enter the D3hot power management state */
4181 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4182 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4183 pmcsr |= PCI_D3hot;
4184 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4185
4186 schedule_timeout_uninterruptible(HZ >> 1);
4187
4188 /* enter the D0 power management state */
4189 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4190 pmcsr |= PCI_D0;
4191 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4192
4193 schedule_timeout_uninterruptible(HZ >> 1);
4194
4195 /* Restore the PCI configuration space. The Open CISS
4196 * Specification says, "Restore the PCI Configuration
4197 * Registers, offsets 00h through 60h. It is important to
4198 * restore the command register, 16-bits at offset 04h,
4199 * last. Do not restore the configuration status register,
4200 * 16-bits at offset 06h." Note that the offset is 2*i. */
4201 for (i = 0; i < 32; i++) {
4202 if (i == 2 || i == 3)
4203 continue;
4204 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4205 }
4206 wmb();
4207 pci_write_config_word(pdev, 4, saved_config_space[2]);
4208
4209 return 0;
4210}
4211
1da177e4
LT		 4212/*
4213 * This is it. Find all the controllers and register them. I really hate
4214 * stealing all these major device numbers.
4215 * returns the number of block devices registered.
4216 */
4217static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4218 const struct pci_device_id *ent)
1da177e4 4219{
1da177e4 4220 int i;
799202cb 4221 int j = 0;
1da177e4 4222 int rc;
22bece00 4223 int dac, return_code;
212a5026 4224 InquiryData_struct *inq_buff;
1da177e4 4225
82eb03cf
CC		 4226 if (reset_devices) {
4227 /* Reset the controller with a PCI power-cycle */
4228 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4229 return -ENODEV;
4230
5e18cfd0
JA		 4231 /* Now try to get the controller to respond to a no-op. Some
4232 devices (notably the HP Smart Array 5i Controller) need
4233 up to 30 seconds to respond. */
5e4c91c8 4234 for (i=0; i<30; i++) {
82eb03cf
CC		 4235 if (cciss_noop(pdev) == 0)
4236 break;
5e4c91c8
JA		 4237
4238 schedule_timeout_uninterruptible(HZ);
4239 }
4240 if (i == 30) {
4241 printk(KERN_ERR "cciss: controller seems dead\n");
4242 return -EBUSY;
82eb03cf
CC		 4243 }
4244 }
4245
1da177e4 4246 i = alloc_cciss_hba();
7c832835 4247 if (i < 0)
e2019b58 4248 return -1;
1f8ef380
MM		 4249
4250 hba[i]->busy_initializing = 1;
8a3173de
JA		 4251 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4252 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4253 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4254
1da177e4 4255 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 4256 goto clean0;
1da177e4
LT		 4257
4258 sprintf(hba[i]->devname, "cciss%d", i);
4259 hba[i]->ctlr = i;
4260 hba[i]->pdev = pdev;
4261
b368c9dd
AP		 4262 init_completion(&hba[i]->scan_wait);
4263
7fe06326
AP		 4264 if (cciss_create_hba_sysfs_entry(hba[i]))
4265 goto clean0;
4266
1da177e4 4267 /* configure PCI DMA stuff */
6a35528a 4268 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4269 dac = 1;
284901a9 4270 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4271 dac = 0;
1da177e4 4272 else {
40aabb58 4273 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4274 goto clean1;
4275 }
4276
4277 /*
4278 * register with the major number, or get a dynamic major number
4279 * by passing 0 as argument. This is done for greater than
4280 * 8 controller support.
4281 */
4282 if (i < MAX_CTLR_ORIG)
564de74a 4283 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4284 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4285 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4286 printk(KERN_ERR
7c832835
BH		 4287 "cciss: Unable to get major number %d for %s "
4288 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4289 goto clean1;
7c832835 4290 } else {
1da177e4
LT		 4291 if (i >= MAX_CTLR_ORIG)
4292 hba[i]->major = rc;
4293 }
4294
4295 /* make sure the board interrupts are off */
4296 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4297 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4298 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4299 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4300 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4301 goto clean2;
4302 }
40aabb58
BH		 4303
4304 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4305 hba[i]->devname, pdev->device, pci_name(pdev),
4306 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4307
4308 hba[i]->cmd_pool_bits =
061837bc
JL		 4309 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4310 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4311 hba[i]->cmd_pool = (CommandList_struct *)
4312 pci_alloc_consistent(hba[i]->pdev,
f880632f 4313 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4314 &(hba[i]->cmd_pool_dhandle));
4315 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4316 pci_alloc_consistent(hba[i]->pdev,
f880632f 4317 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4318 &(hba[i]->errinfo_pool_dhandle));
4319 if ((hba[i]->cmd_pool_bits == NULL)
4320 || (hba[i]->cmd_pool == NULL)
4321 || (hba[i]->errinfo_pool == NULL)) {
4322 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4323 goto clean4;
4324 }
1da177e4 4325 spin_lock_init(&hba[i]->lock);
1da177e4 4326
7c832835
BH		 4327 /* Initialize the pdev driver private data.
4328 have it point to hba[i]. */
1da177e4 4329 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4330 /* command and error info recs zeroed out before
4331 they are used */
4332 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4333 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4334 * sizeof(unsigned long));
1da177e4 4335
6ae5ce8e
MM		 4336 hba[i]->num_luns = 0;
4337 hba[i]->highest_lun = -1;
4338 for (j = 0; j < CISS_MAX_LUN; j++) {
9cef0d2f 4339 hba[i]->drv[j] = NULL;
6ae5ce8e
MM		 4340 hba[i]->gendisk[j] = NULL;
4341 }
1da177e4
LT		 4342
4343 cciss_scsi_setup(i);
4344
4345 /* Turn the interrupts on so we can service requests */
4346 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4347
22bece00
MM		 4348 /* Get the firmware version */
4349 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4350 if (inq_buff == NULL) {
4351 printk(KERN_ERR "cciss: out of memory\n");
4352 goto clean4;
4353 }
4354
4355 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4356 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4357 if (return_code == IO_OK) {
4358 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4359 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4360 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4361 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4362 } else { /* send command failed */
4363 printk(KERN_WARNING "cciss: unable to determine firmware"
4364 " version of controller\n");
4365 }
212a5026 4366 kfree(inq_buff);
22bece00 4367
1da177e4 4368 cciss_procinit(i);
92c4231a
MM		 4369
4370 hba[i]->cciss_max_sectors = 2048;
4371
2d11d993 4372 rebuild_lun_table(hba[i], 1, 0);
b368c9dd 4373 hba[i]->busy_initializing = 0;
e2019b58 4374 return 1;
1da177e4 4375
6ae5ce8e 4376clean4:
6044ec88 4377 kfree(hba[i]->cmd_pool_bits);
7c832835 4378 if (hba[i]->cmd_pool)
1da177e4 4379 pci_free_consistent(hba[i]->pdev,
f880632f 4380 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4381 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4382 if (hba[i]->errinfo_pool)
1da177e4 4383 pci_free_consistent(hba[i]->pdev,
f880632f 4384 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4385 hba[i]->errinfo_pool,
4386 hba[i]->errinfo_pool_dhandle);
fb86a35b 4387 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4388clean2:
1da177e4 4389 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4390clean1:
7fe06326
AP		 4391 cciss_destroy_hba_sysfs_entry(hba[i]);
4392clean0:
1f8ef380 4393 hba[i]->busy_initializing = 0;
9cef0d2f 4394
872225ca
MM		 4395 /*
4396 * Deliberately omit pci_disable_device(): it does something nasty to
4397 * Smart Array controllers that pci_enable_device does not undo
4398 */
799202cb 4399 pci_release_regions(pdev);
799202cb 4400 pci_set_drvdata(pdev, NULL);
61808c2b 4401 free_hba(i);
e2019b58 4402 return -1;
1da177e4
LT		 4403}
4404
e9ca75b5 4405static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4406{
4407 ctlr_info_t *tmp_ptr;
e9ca75b5 4408 int i;
1da177e4 4409 char flush_buf[4];
7c832835 4410 int return_code;
1da177e4 4411
e9ca75b5
GB		 4412 tmp_ptr = pci_get_drvdata(pdev);
4413 if (tmp_ptr == NULL)
4414 return;
4415 i = tmp_ptr->ctlr;
4416 if (hba[i] == NULL)
4417 return;
4418
4419 /* Turn board interrupts off and send the flush cache command */
4420 /* sendcmd will turn off interrupt, and send the flush...
4421 * To write all data in the battery backed cache to disks */
4422 memset(flush_buf, 0, 4);
b57695fe 4423 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4424 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4425 if (return_code == IO_OK) {
4426 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4427 } else {
4428 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4429 }
4430 free_irq(hba[i]->intr[2], hba[i]);
4431}
4432
4433static void __devexit cciss_remove_one(struct pci_dev *pdev)
4434{
4435 ctlr_info_t *tmp_ptr;
4436 int i, j;
4437
7c832835
BH		 4438 if (pci_get_drvdata(pdev) == NULL) {
4439 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4440 return;
4441 }
0a9279cc 4442
1da177e4
LT		 4443 tmp_ptr = pci_get_drvdata(pdev);
4444 i = tmp_ptr->ctlr;
7c832835 4445 if (hba[i] == NULL) {
1da177e4 4446 printk(KERN_ERR "cciss: device appears to "
7c832835 4447 "already be removed \n");
1da177e4
LT		 4448 return;
4449 }
b6550777 4450
b368c9dd 4451 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4452
b368c9dd 4453 remove_from_scan_list(hba[i]);
b6550777
BH		 4454 remove_proc_entry(hba[i]->devname, proc_cciss);
4455 unregister_blkdev(hba[i]->major, hba[i]->devname);
4456
4457 /* remove it from the disk list */
4458 for (j = 0; j < CISS_MAX_LUN; j++) {
4459 struct gendisk *disk = hba[i]->gendisk[j];
4460 if (disk) {
165125e1 4461 struct request_queue *q = disk->queue;
b6550777 4462
097d0264 4463 if (disk->flags & GENHD_FL_UP) {
8ce51966 4464 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4465 del_gendisk(disk);
097d0264 4466 }
b6550777
BH		 4467 if (q)
4468 blk_cleanup_queue(q);
4469 }
4470 }
4471
ba198efb 4472#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4473 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4474#endif
b6550777 4475
e9ca75b5 4476 cciss_shutdown(pdev);
fb86a35b
MM		 4477
4478#ifdef CONFIG_PCI_MSI
7c832835
BH		 4479 if (hba[i]->msix_vector)
4480 pci_disable_msix(hba[i]->pdev);
4481 else if (hba[i]->msi_vector)
4482 pci_disable_msi(hba[i]->pdev);
4483#endif /* CONFIG_PCI_MSI */
fb86a35b 4484
1da177e4 4485 iounmap(hba[i]->vaddr);
1da177e4 4486
f880632f 4487 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4488 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4489 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4490 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4491 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4492 /*
4493 * Deliberately omit pci_disable_device(): it does something nasty to
4494 * Smart Array controllers that pci_enable_device does not undo
4495 */
7c832835 4496 pci_release_regions(pdev);
4e570309 4497 pci_set_drvdata(pdev, NULL);
7fe06326 4498 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4499 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4500 free_hba(i);
7c832835 4501}
1da177e4
LT		 4502
4503static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4504 .name = "cciss",
4505 .probe = cciss_init_one,
4506 .remove = __devexit_p(cciss_remove_one),
4507 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4508 .shutdown = cciss_shutdown,
1da177e4
LT		 4509};
4510
4511/*
4512 * This is it. Register the PCI driver information for the cards we control
7c832835 4513 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4514 */
4515static int __init cciss_init(void)
4516{
7fe06326
AP		 4517 int err;
4518
10cbda97
JA		 4519 /*
4520 * The hardware requires that commands are aligned on a 64-bit
4521 * boundary. Given that we use pci_alloc_consistent() to allocate an
4522 * array of them, the size must be a multiple of 8 bytes.
4523 */
4524 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4525
1da177e4
LT		 4526 printk(KERN_INFO DRIVER_NAME "\n");
4527
7fe06326
AP		 4528 err = bus_register(&cciss_bus_type);
4529 if (err)
4530 return err;
4531
b368c9dd
AP		 4532 /* Start the scan thread */
4533 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4534 if (IS_ERR(cciss_scan_thread)) {
4535 err = PTR_ERR(cciss_scan_thread);
4536 goto err_bus_unregister;
4537 }
4538
1da177e4 4539 /* Register for our PCI devices */
7fe06326
AP		 4540 err = pci_register_driver(&cciss_pci_driver);
4541 if (err)
b368c9dd 4542 goto err_thread_stop;
7fe06326 4543
617e1344 4544 return err;
7fe06326 4545
b368c9dd
AP		 4546err_thread_stop:
4547 kthread_stop(cciss_scan_thread);
4548err_bus_unregister:
7fe06326 4549 bus_unregister(&cciss_bus_type);
b368c9dd 4550
7fe06326 4551 return err;
1da177e4
LT		 4552}
4553
4554static void __exit cciss_cleanup(void)
4555{
4556 int i;
4557
4558 pci_unregister_driver(&cciss_pci_driver);
4559 /* double check that all controller entrys have been removed */
7c832835
BH		 4560 for (i = 0; i < MAX_CTLR; i++) {
4561 if (hba[i] != NULL) {
1da177e4 4562 printk(KERN_WARNING "cciss: had to remove"
7c832835 4563 " controller %d\n", i);
1da177e4
LT		 4564 cciss_remove_one(hba[i]->pdev);
4565 }
4566 }
b368c9dd 4567 kthread_stop(cciss_scan_thread);
928b4d8c 4568 remove_proc_entry("driver/cciss", NULL);
7fe06326 4569 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4570}
4571
33079b21
MM		 4572static void fail_all_cmds(unsigned long ctlr)
4573{
4574 /* If we get here, the board is apparently dead. */
4575 ctlr_info_t *h = hba[ctlr];
4576 CommandList_struct *c;
4577 unsigned long flags;
4578
4579 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4580 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4581
4582 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4583
7c832835 4584 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4585
4586 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4587 while (!hlist_empty(&h->reqQ)) {
4588 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4589 removeQ(c);
33079b21 4590 h->Qdepth--;
8a3173de 4591 addQ(&h->cmpQ, c);
33079b21
MM		 4592 }
4593
4594 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4595 while (!hlist_empty(&h->cmpQ)) {
4596 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4597 removeQ(c);
b59e64d0
HR		 4598 if (c->cmd_type != CMD_MSG_STALE)
4599 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4600 if (c->cmd_type == CMD_RWREQ) {
4601 complete_command(h, c, 0);
4602 } else if (c->cmd_type == CMD_IOCTL_PEND)
4603 complete(c->waiting);
4604#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4605 else if (c->cmd_type == CMD_SCSI)
4606 complete_scsi_command(c, 0, 0);
33079b21
MM		 4607#endif
4608 }
4609 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4610 return;
4611}
4612
1da177e4
LT		 4613module_init(cciss_init);
4614module_exit(cciss_cleanup);
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