]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - drivers/block/cciss.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
cciss: Clear all sysfs-exposed data for deleted logical drives.
[mirror_ubuntu-bionic-kernel.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);
6ae5ce8e 173static int rebuild_lun_table(ctlr_info_t *h, int first_time);
a0ea8622 174static int deregister_disk(ctlr_info_t *h, int drv_index,
7c832835 175 int clear_all);
1da177e4 176
00988a35
MMOD		 177static void cciss_read_capacity(int ctlr, int logvol, int withirq,
178 sector_t *total_size, unsigned int *block_size);
179static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
180 sector_t *total_size, unsigned int *block_size);
181static void cciss_geometry_inquiry(int ctlr, int logvol,
182 int withirq, sector_t total_size,
183 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 184 drive_info_struct *drv);
7c832835
BH		 185static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
186 __u32);
187static void start_io(ctlr_info_t *h);
188static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
7c832835
BH		 189 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
190static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 191 __u8 page_code, unsigned char scsi3addr[],
192 int cmd_type);
85cc61ae 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
194 int attempt_retry);
195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 196
33079b21 197static void fail_all_cmds(unsigned long ctlr);
d6f4965d 198static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 199static int scan_thread(void *data);
200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 201static void cciss_hba_release(struct device *dev);
202static void cciss_device_release(struct device *dev);
361e9b07 203static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
33079b21 204
1da177e4 205#ifdef CONFIG_PROC_FS
1da177e4
LT		 206static void cciss_procinit(int i);
207#else
7c832835
BH		 208static void cciss_procinit(int i)
209{
210}
211#endif /* CONFIG_PROC_FS */
1da177e4
LT		 212
213#ifdef CONFIG_COMPAT
ef7822c2
AV		 214static int cciss_compat_ioctl(struct block_device *, fmode_t,
215 unsigned, unsigned long);
1da177e4
LT		 216#endif
217
83d5cde4 218static const struct block_device_operations cciss_fops = {
7c832835 219 .owner = THIS_MODULE,
ef7822c2
AV		 220 .open = cciss_open,
221 .release = cciss_release,
222 .locked_ioctl = cciss_ioctl,
7c832835 223 .getgeo = cciss_getgeo,
1da177e4 224#ifdef CONFIG_COMPAT
ef7822c2 225 .compat_ioctl = cciss_compat_ioctl,
1da177e4 226#endif
7c832835 227 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 228};
229
230/*
231 * Enqueuing and dequeuing functions for cmdlists.
232 */
8a3173de 233static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 234{
8a3173de 235 hlist_add_head(&c->list, list);
1da177e4
LT		 236}
237
8a3173de 238static inline void removeQ(CommandList_struct *c)
1da177e4 239{
b59e64d0
HR		 240 /*
241 * After kexec/dump some commands might still
242 * be in flight, which the firmware will try
243 * to complete. Resetting the firmware doesn't work
244 * with old fw revisions, so we have to mark
245 * them off as 'stale' to prevent the driver from
246 * falling over.
247 */
248 if (WARN_ON(hlist_unhashed(&c->list))) {
249 c->cmd_type = CMD_MSG_STALE;
8a3173de 250 return;
b59e64d0 251 }
8a3173de
JA		 252
253 hlist_del_init(&c->list);
1da177e4
LT		 254}
255
256#include "cciss_scsi.c" /* For SCSI tape support */
257
0f5486ec
RD		 258#define RAID_UNKNOWN 6
259
1da177e4
LT		 260#ifdef CONFIG_PROC_FS
261
262/*
263 * Report information about this controller.
264 */
265#define ENG_GIG 1000000000
266#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 267#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 268static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
269 "UNKNOWN"
270};
1da177e4
LT		 271
272static struct proc_dir_entry *proc_cciss;
273
89b6e743 274static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 275{
89b6e743
MM		 276 ctlr_info_t *h = seq->private;
277
278 seq_printf(seq, "%s: HP %s Controller\n"
279 "Board ID: 0x%08lx\n"
280 "Firmware Version: %c%c%c%c\n"
281 "IRQ: %d\n"
282 "Logical drives: %d\n"
283 "Current Q depth: %d\n"
284 "Current # commands on controller: %d\n"
285 "Max Q depth since init: %d\n"
286 "Max # commands on controller since init: %d\n"
287 "Max SG entries since init: %d\n",
288 h->devname,
289 h->product_name,
290 (unsigned long)h->board_id,
291 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
292 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
293 h->num_luns,
294 h->Qdepth, h->commands_outstanding,
295 h->maxQsinceinit, h->max_outstanding, h->maxSG);
296
297#ifdef CONFIG_CISS_SCSI_TAPE
298 cciss_seq_tape_report(seq, h->ctlr);
299#endif /* CONFIG_CISS_SCSI_TAPE */
300}
1da177e4 301
89b6e743
MM		 302static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
303{
304 ctlr_info_t *h = seq->private;
305 unsigned ctlr = h->ctlr;
306 unsigned long flags;
1da177e4
LT		 307
308 /* prevent displaying bogus info during configuration
309 * or deconfiguration of a logical volume
310 */
311 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
312 if (h->busy_configuring) {
313 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 314 return ERR_PTR(-EBUSY);
1da177e4
LT		 315 }
316 h->busy_configuring = 1;
317 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
318
89b6e743
MM		 319 if (*pos == 0)
320 cciss_seq_show_header(seq);
321
322 return pos;
323}
324
325static int cciss_seq_show(struct seq_file *seq, void *v)
326{
327 sector_t vol_sz, vol_sz_frac;
328 ctlr_info_t *h = seq->private;
329 unsigned ctlr = h->ctlr;
330 loff_t *pos = v;
331 drive_info_struct *drv = &h->drv[*pos];
332
333 if (*pos > h->highest_lun)
334 return 0;
335
336 if (drv->heads == 0)
337 return 0;
338
339 vol_sz = drv->nr_blocks;
340 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
341 vol_sz_frac *= 100;
342 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
343
344 if (drv->raid_level > 5)
345 drv->raid_level = RAID_UNKNOWN;
346 seq_printf(seq, "cciss/c%dd%d:"
347 "\t%4u.%02uGB\tRAID %s\n",
348 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
349 raid_label[drv->raid_level]);
350 return 0;
351}
352
353static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
354{
355 ctlr_info_t *h = seq->private;
356
357 if (*pos > h->highest_lun)
358 return NULL;
359 *pos += 1;
360
361 return pos;
362}
363
364static void cciss_seq_stop(struct seq_file *seq, void *v)
365{
366 ctlr_info_t *h = seq->private;
367
368 /* Only reset h->busy_configuring if we succeeded in setting
369 * it during cciss_seq_start. */
370 if (v == ERR_PTR(-EBUSY))
371 return;
7c832835 372
1da177e4 373 h->busy_configuring = 0;
1da177e4
LT		 374}
375
88e9d34c 376static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 377 .start = cciss_seq_start,
378 .show = cciss_seq_show,
379 .next = cciss_seq_next,
380 .stop = cciss_seq_stop,
381};
382
383static int cciss_seq_open(struct inode *inode, struct file *file)
384{
385 int ret = seq_open(file, &cciss_seq_ops);
386 struct seq_file *seq = file->private_data;
387
388 if (!ret)
389 seq->private = PDE(inode)->data;
390
391 return ret;
392}
393
394static ssize_t
395cciss_proc_write(struct file *file, const char __user *buf,
396 size_t length, loff_t *ppos)
1da177e4 397{
89b6e743
MM		 398 int err;
399 char *buffer;
400
401#ifndef CONFIG_CISS_SCSI_TAPE
402 return -EINVAL;
1da177e4
LT		 403#endif
404
89b6e743 405 if (!buf || length > PAGE_SIZE - 1)
7c832835 406 return -EINVAL;
89b6e743
MM		 407
408 buffer = (char *)__get_free_page(GFP_KERNEL);
409 if (!buffer)
410 return -ENOMEM;
411
412 err = -EFAULT;
413 if (copy_from_user(buffer, buf, length))
414 goto out;
415 buffer[length] = '\0';
416
417#ifdef CONFIG_CISS_SCSI_TAPE
418 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
419 struct seq_file *seq = file->private_data;
420 ctlr_info_t *h = seq->private;
421 int rc;
422
7c832835
BH		 423 rc = cciss_engage_scsi(h->ctlr);
424 if (rc != 0)
89b6e743
MM		 425 err = -rc;
426 else
427 err = length;
428 } else
429#endif /* CONFIG_CISS_SCSI_TAPE */
430 err = -EINVAL;
7c832835
BH		 431 /* might be nice to have "disengage" too, but it's not
432 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 433
434out:
435 free_page((unsigned long)buffer);
436 return err;
1da177e4
LT		 437}
438
89b6e743
MM		 439static struct file_operations cciss_proc_fops = {
440 .owner = THIS_MODULE,
441 .open = cciss_seq_open,
442 .read = seq_read,
443 .llseek = seq_lseek,
444 .release = seq_release,
445 .write = cciss_proc_write,
446};
447
1da177e4
LT		 448static void __devinit cciss_procinit(int i)
449{
450 struct proc_dir_entry *pde;
451
89b6e743 452 if (proc_cciss == NULL)
928b4d8c 453 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 454 if (!proc_cciss)
455 return;
3dfcf9c4 456 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 457 S_IROTH, proc_cciss,
3dfcf9c4 458 &cciss_proc_fops, hba[i]);
1da177e4 459}
7c832835 460#endif /* CONFIG_PROC_FS */
1da177e4 461
7fe06326
AP		 462#define MAX_PRODUCT_NAME_LEN 19
463
464#define to_hba(n) container_of(n, struct ctlr_info, dev)
7fe06326 465
d6f4965d
AP		 466static ssize_t host_store_rescan(struct device *dev,
467 struct device_attribute *attr,
468 const char *buf, size_t count)
469{
470 struct ctlr_info *h = to_hba(dev);
471
472 add_to_scan_list(h);
473 wake_up_process(cciss_scan_thread);
474 wait_for_completion_interruptible(&h->scan_wait);
475
476 return count;
477}
478DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 479
480static ssize_t dev_show_unique_id(struct device *dev,
481 struct device_attribute *attr,
482 char *buf)
483{
617e1344
SC		 484 drive_info_struct *drv = dev_get_drvdata(dev);
485 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 486 __u8 sn[16];
487 unsigned long flags;
488 int ret = 0;
489
490 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
491 if (h->busy_configuring)
492 ret = -EBUSY;
493 else
494 memcpy(sn, drv->serial_no, sizeof(sn));
495 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
496
497 if (ret)
498 return ret;
499 else
500 return snprintf(buf, 16 * 2 + 2,
501 "%02X%02X%02X%02X%02X%02X%02X%02X"
502 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
503 sn[0], sn[1], sn[2], sn[3],
504 sn[4], sn[5], sn[6], sn[7],
505 sn[8], sn[9], sn[10], sn[11],
506 sn[12], sn[13], sn[14], sn[15]);
507}
508DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
509
510static ssize_t dev_show_vendor(struct device *dev,
511 struct device_attribute *attr,
512 char *buf)
513{
617e1344
SC		 514 drive_info_struct *drv = dev_get_drvdata(dev);
515 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 516 char vendor[VENDOR_LEN + 1];
517 unsigned long flags;
518 int ret = 0;
519
520 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
521 if (h->busy_configuring)
522 ret = -EBUSY;
523 else
524 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
525 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
526
527 if (ret)
528 return ret;
529 else
530 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
531}
532DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
533
534static ssize_t dev_show_model(struct device *dev,
535 struct device_attribute *attr,
536 char *buf)
537{
617e1344
SC		 538 drive_info_struct *drv = dev_get_drvdata(dev);
539 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 540 char model[MODEL_LEN + 1];
541 unsigned long flags;
542 int ret = 0;
543
544 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
545 if (h->busy_configuring)
546 ret = -EBUSY;
547 else
548 memcpy(model, drv->model, MODEL_LEN + 1);
549 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
550
551 if (ret)
552 return ret;
553 else
554 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
555}
556DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
557
558static ssize_t dev_show_rev(struct device *dev,
559 struct device_attribute *attr,
560 char *buf)
561{
617e1344
SC		 562 drive_info_struct *drv = dev_get_drvdata(dev);
563 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 564 char rev[REV_LEN + 1];
565 unsigned long flags;
566 int ret = 0;
567
568 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
569 if (h->busy_configuring)
570 ret = -EBUSY;
571 else
572 memcpy(rev, drv->rev, REV_LEN + 1);
573 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
574
575 if (ret)
576 return ret;
577 else
578 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
579}
580DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
581
d6f4965d
AP		 582static struct attribute *cciss_host_attrs[] = {
583 &dev_attr_rescan.attr,
584 NULL
585};
586
587static struct attribute_group cciss_host_attr_group = {
588 .attrs = cciss_host_attrs,
589};
590
591static struct attribute_group *cciss_host_attr_groups[] = {
592 &cciss_host_attr_group,
593 NULL
594};
595
596static struct device_type cciss_host_type = {
597 .name = "cciss_host",
598 .groups = cciss_host_attr_groups,
617e1344 599 .release = cciss_hba_release,
d6f4965d
AP		 600};
601
7fe06326
AP		 602static struct attribute *cciss_dev_attrs[] = {
603 &dev_attr_unique_id.attr,
604 &dev_attr_model.attr,
605 &dev_attr_vendor.attr,
606 &dev_attr_rev.attr,
607 NULL
608};
609
610static struct attribute_group cciss_dev_attr_group = {
611 .attrs = cciss_dev_attrs,
612};
613
a4dbd674 614static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 615 &cciss_dev_attr_group,
616 NULL
617};
618
619static struct device_type cciss_dev_type = {
620 .name = "cciss_device",
621 .groups = cciss_dev_attr_groups,
617e1344 622 .release = cciss_device_release,
7fe06326
AP		 623};
624
625static struct bus_type cciss_bus_type = {
626 .name = "cciss",
627};
628
617e1344
SC		 629/*
630 * cciss_hba_release is called when the reference count
631 * of h->dev goes to zero.
632 */
633static void cciss_hba_release(struct device *dev)
634{
635 /*
636 * nothing to do, but need this to avoid a warning
637 * about not having a release handler from lib/kref.c.
638 */
639}
7fe06326
AP		 640
641/*
642 * Initialize sysfs entry for each controller. This sets up and registers
643 * the 'cciss#' directory for each individual controller under
644 * /sys/bus/pci/devices/<dev>/.
645 */
646static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
647{
648 device_initialize(&h->dev);
649 h->dev.type = &cciss_host_type;
650 h->dev.bus = &cciss_bus_type;
651 dev_set_name(&h->dev, "%s", h->devname);
652 h->dev.parent = &h->pdev->dev;
653
654 return device_add(&h->dev);
655}
656
657/*
658 * Remove sysfs entries for an hba.
659 */
660static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
661{
662 device_del(&h->dev);
617e1344
SC		 663 put_device(&h->dev); /* final put. */
664}
665
666/* cciss_device_release is called when the reference count
667 * of h->drv[x].dev goes to zero.
668 */
669static void cciss_device_release(struct device *dev)
670{
671 kfree(dev);
7fe06326
AP		 672}
673
674/*
675 * Initialize sysfs for each logical drive. This sets up and registers
676 * the 'c#d#' directory for each individual logical drive under
677 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
678 * /sys/block/cciss!c#d# to this entry.
679 */
617e1344 680static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 681 int drv_index)
682{
617e1344
SC		 683 struct device *dev;
684
8ce51966
SC		 685 /* Special case for c*d0, we only create it once. */
686 if (drv_index == 0 && h->drv[drv_index].dev != NULL)
687 return 0;
688
617e1344
SC		 689 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
690 if (!dev)
691 return -ENOMEM;
692 device_initialize(dev);
693 dev->type = &cciss_dev_type;
694 dev->bus = &cciss_bus_type;
695 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
696 dev->parent = &h->dev;
697 h->drv[drv_index].dev = dev;
698 dev_set_drvdata(dev, &h->drv[drv_index]);
699 return device_add(dev);
7fe06326
AP		 700}
701
702/*
703 * Remove sysfs entries for a logical drive.
704 */
8ce51966
SC		 705static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
706 int ctlr_exiting)
7fe06326 707{
617e1344 708 struct device *dev = h->drv[drv_index].dev;
8ce51966
SC		 709
710 /* special case for c*d0, we only destroy it on controller exit */
711 if (drv_index == 0 && !ctlr_exiting)
712 return;
713
617e1344
SC		 714 device_del(dev);
715 put_device(dev); /* the "final" put. */
716 h->drv[drv_index].dev = NULL;
7fe06326
AP		 717}
718
7c832835
BH		 719/*
720 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 721 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 722 * which ones are free or in use. For operations that can wait for kmalloc
723 * to possible sleep, this routine can be called with get_from_pool set to 0.
724 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
725 */
726static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 727{
728 CommandList_struct *c;
7c832835 729 int i;
1da177e4
LT		 730 u64bit temp64;
731 dma_addr_t cmd_dma_handle, err_dma_handle;
732
7c832835
BH		 733 if (!get_from_pool) {
734 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
735 sizeof(CommandList_struct), &cmd_dma_handle);
736 if (c == NULL)
737 return NULL;
1da177e4
LT		 738 memset(c, 0, sizeof(CommandList_struct));
739
33079b21
MM		 740 c->cmdindex = -1;
741
7c832835
BH		 742 c->err_info = (ErrorInfo_struct *)
743 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
744 &err_dma_handle);
745
746 if (c->err_info == NULL) {
747 pci_free_consistent(h->pdev,
1da177e4
LT		 748 sizeof(CommandList_struct), c, cmd_dma_handle);
749 return NULL;
750 }
751 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 752 } else { /* get it out of the controllers pool */
753
754 do {
f880632f
MM		 755 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
756 if (i == h->nr_cmds)
7c832835
BH		 757 return NULL;
758 } while (test_and_set_bit
759 (i & (BITS_PER_LONG - 1),
760 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 761#ifdef CCISS_DEBUG
762 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
763#endif
7c832835 764 c = h->cmd_pool + i;
1da177e4 765 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 766 cmd_dma_handle = h->cmd_pool_dhandle
767 + i * sizeof(CommandList_struct);
1da177e4
LT		 768 c->err_info = h->errinfo_pool + i;
769 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 770 err_dma_handle = h->errinfo_pool_dhandle
771 + i * sizeof(ErrorInfo_struct);
772 h->nr_allocs++;
33079b21
MM		 773
774 c->cmdindex = i;
7c832835 775 }
1da177e4 776
8a3173de 777 INIT_HLIST_NODE(&c->list);
1da177e4 778 c->busaddr = (__u32) cmd_dma_handle;
7c832835 779 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 780 c->ErrDesc.Addr.lower = temp64.val32.lower;
781 c->ErrDesc.Addr.upper = temp64.val32.upper;
782 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 783
7c832835
BH		 784 c->ctlr = h->ctlr;
785 return c;
1da177e4
LT		 786}
787
7c832835
BH		 788/*
789 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 790 */
791static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
792{
793 int i;
794 u64bit temp64;
795
7c832835 796 if (!got_from_pool) {
1da177e4
LT		 797 temp64.val32.lower = c->ErrDesc.Addr.lower;
798 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 799 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
800 c->err_info, (dma_addr_t) temp64.val);
801 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
802 c, (dma_addr_t) c->busaddr);
803 } else {
1da177e4 804 i = c - h->cmd_pool;
7c832835
BH		 805 clear_bit(i & (BITS_PER_LONG - 1),
806 h->cmd_pool_bits + (i / BITS_PER_LONG));
807 h->nr_frees++;
808 }
1da177e4
LT		 809}
810
811static inline ctlr_info_t *get_host(struct gendisk *disk)
812{
7c832835 813 return disk->queue->queuedata;
1da177e4
LT		 814}
815
816static inline drive_info_struct *get_drv(struct gendisk *disk)
817{
818 return disk->private_data;
819}
820
821/*
822 * Open. Make sure the device is really there.
823 */
ef7822c2 824static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 825{
ef7822c2
AV		 826 ctlr_info_t *host = get_host(bdev->bd_disk);
827 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 828
829#ifdef CCISS_DEBUG
ef7822c2 830 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 831#endif /* CCISS_DEBUG */
1da177e4 832
ddd47442
MM		 833 if (host->busy_initializing || drv->busy_configuring)
834 return -EBUSY;
1da177e4
LT		 835 /*
836 * Root is allowed to open raw volume zero even if it's not configured
837 * so array config can still work. Root is also allowed to open any
838 * volume that has a LUN ID, so it can issue IOCTL to reread the
839 * disk information. I don't think I really like this
840 * but I'm already using way to many device nodes to claim another one
841 * for "raw controller".
842 */
7a06f789 843 if (drv->heads == 0) {
ef7822c2 844 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 845 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 846 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 847 return -ENXIO;
1da177e4
LT		 848 /* if it is, make sure we have a LUN ID */
849 } else if (drv->LunID == 0) {
850 return -ENXIO;
851 }
852 }
853 if (!capable(CAP_SYS_ADMIN))
854 return -EPERM;
855 }
856 drv->usage_count++;
857 host->usage_count++;
858 return 0;
859}
7c832835 860
1da177e4
LT		 861/*
862 * Close. Sync first.
863 */
ef7822c2 864static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 865{
ef7822c2
AV		 866 ctlr_info_t *host = get_host(disk);
867 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 868
869#ifdef CCISS_DEBUG
ef7822c2 870 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 871#endif /* CCISS_DEBUG */
1da177e4
LT		 872
873 drv->usage_count--;
874 host->usage_count--;
875 return 0;
876}
877
878#ifdef CONFIG_COMPAT
879
ef7822c2
AV		 880static int do_ioctl(struct block_device *bdev, fmode_t mode,
881 unsigned cmd, unsigned long arg)
1da177e4
LT		 882{
883 int ret;
884 lock_kernel();
ef7822c2 885 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 886 unlock_kernel();
887 return ret;
888}
889
ef7822c2
AV		 890static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
891 unsigned cmd, unsigned long arg);
892static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
893 unsigned cmd, unsigned long arg);
1da177e4 894
ef7822c2
AV		 895static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
896 unsigned cmd, unsigned long arg)
1da177e4
LT		 897{
898 switch (cmd) {
899 case CCISS_GETPCIINFO:
900 case CCISS_GETINTINFO:
901 case CCISS_SETINTINFO:
902 case CCISS_GETNODENAME:
903 case CCISS_SETNODENAME:
904 case CCISS_GETHEARTBEAT:
905 case CCISS_GETBUSTYPES:
906 case CCISS_GETFIRMVER:
907 case CCISS_GETDRIVVER:
908 case CCISS_REVALIDVOLS:
909 case CCISS_DEREGDISK:
910 case CCISS_REGNEWDISK:
911 case CCISS_REGNEWD:
912 case CCISS_RESCANDISK:
913 case CCISS_GETLUNINFO:
ef7822c2 914 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 915
916 case CCISS_PASSTHRU32:
ef7822c2 917 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 918 case CCISS_BIG_PASSTHRU32:
ef7822c2 919 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 920
921 default:
922 return -ENOIOCTLCMD;
923 }
924}
925
ef7822c2
AV		 926static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
927 unsigned cmd, unsigned long arg)
1da177e4
LT		 928{
929 IOCTL32_Command_struct __user *arg32 =
7c832835 930 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 931 IOCTL_Command_struct arg64;
932 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
933 int err;
934 u32 cp;
935
936 err = 0;
7c832835
BH		 937 err |=
938 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
939 sizeof(arg64.LUN_info));
940 err |=
941 copy_from_user(&arg64.Request, &arg32->Request,
942 sizeof(arg64.Request));
943 err |=
944 copy_from_user(&arg64.error_info, &arg32->error_info,
945 sizeof(arg64.error_info));
1da177e4
LT		 946 err |= get_user(arg64.buf_size, &arg32->buf_size);
947 err |= get_user(cp, &arg32->buf);
948 arg64.buf = compat_ptr(cp);
949 err |= copy_to_user(p, &arg64, sizeof(arg64));
950
951 if (err)
952 return -EFAULT;
953
ef7822c2 954 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 955 if (err)
956 return err;
7c832835
BH		 957 err |=
958 copy_in_user(&arg32->error_info, &p->error_info,
959 sizeof(arg32->error_info));
1da177e4
LT		 960 if (err)
961 return -EFAULT;
962 return err;
963}
964
ef7822c2
AV		 965static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
966 unsigned cmd, unsigned long arg)
1da177e4
LT		 967{
968 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 969 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 970 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 971 BIG_IOCTL_Command_struct __user *p =
972 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 973 int err;
974 u32 cp;
975
976 err = 0;
7c832835
BH		 977 err |=
978 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
979 sizeof(arg64.LUN_info));
980 err |=
981 copy_from_user(&arg64.Request, &arg32->Request,
982 sizeof(arg64.Request));
983 err |=
984 copy_from_user(&arg64.error_info, &arg32->error_info,
985 sizeof(arg64.error_info));
1da177e4
LT		 986 err |= get_user(arg64.buf_size, &arg32->buf_size);
987 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
988 err |= get_user(cp, &arg32->buf);
989 arg64.buf = compat_ptr(cp);
990 err |= copy_to_user(p, &arg64, sizeof(arg64));
991
992 if (err)
7c832835 993 return -EFAULT;
1da177e4 994
ef7822c2 995 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 996 if (err)
997 return err;
7c832835
BH		 998 err |=
999 copy_in_user(&arg32->error_info, &p->error_info,
1000 sizeof(arg32->error_info));
1da177e4
LT		 1001 if (err)
1002 return -EFAULT;
1003 return err;
1004}
1005#endif
a885c8c4
CH		 1006
1007static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1008{
1009 drive_info_struct *drv = get_drv(bdev->bd_disk);
1010
1011 if (!drv->cylinders)
1012 return -ENXIO;
1013
1014 geo->heads = drv->heads;
1015 geo->sectors = drv->sectors;
1016 geo->cylinders = drv->cylinders;
1017 return 0;
1018}
1019
0a9279cc
MM		 1020static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1021{
1022 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1023 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1024 (void)check_for_unit_attention(host, c);
1025}
1da177e4 1026/*
7c832835 1027 * ioctl
1da177e4 1028 */
ef7822c2 1029static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1030 unsigned int cmd, unsigned long arg)
1da177e4 1031{
1da177e4
LT		 1032 struct gendisk *disk = bdev->bd_disk;
1033 ctlr_info_t *host = get_host(disk);
1034 drive_info_struct *drv = get_drv(disk);
1035 int ctlr = host->ctlr;
1036 void __user *argp = (void __user *)arg;
1037
1038#ifdef CCISS_DEBUG
1039 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1040#endif /* CCISS_DEBUG */
1041
1042 switch (cmd) {
1da177e4 1043 case CCISS_GETPCIINFO:
7c832835
BH		 1044 {
1045 cciss_pci_info_struct pciinfo;
1046
1047 if (!arg)
1048 return -EINVAL;
1049 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1050 pciinfo.bus = host->pdev->bus->number;
1051 pciinfo.dev_fn = host->pdev->devfn;
1052 pciinfo.board_id = host->board_id;
1053 if (copy_to_user
1054 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1055 return -EFAULT;
1056 return 0;
1057 }
1da177e4 1058 case CCISS_GETINTINFO:
7c832835
BH		 1059 {
1060 cciss_coalint_struct intinfo;
1061 if (!arg)
1062 return -EINVAL;
1063 intinfo.delay =
1064 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1065 intinfo.count =
1066 readl(&host->cfgtable->HostWrite.CoalIntCount);
1067 if (copy_to_user
1068 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1069 return -EFAULT;
1070 return 0;
1071 }
1da177e4 1072 case CCISS_SETINTINFO:
1da177e4 1073 {
7c832835
BH		 1074 cciss_coalint_struct intinfo;
1075 unsigned long flags;
1076 int i;
1077
1078 if (!arg)
1079 return -EINVAL;
1080 if (!capable(CAP_SYS_ADMIN))
1081 return -EPERM;
1082 if (copy_from_user
1083 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1084 return -EFAULT;
1085 if ((intinfo.delay == 0) && (intinfo.count == 0))
1086 {
1087// printk("cciss_ioctl: delay and count cannot be 0\n");
1088 return -EINVAL;
1089 }
1090 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1091 /* Update the field, and then ring the doorbell */
1092 writel(intinfo.delay,
1093 &(host->cfgtable->HostWrite.CoalIntDelay));
1094 writel(intinfo.count,
1095 &(host->cfgtable->HostWrite.CoalIntCount));
1096 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1097
1098 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1099 if (!(readl(host->vaddr + SA5_DOORBELL)
1100 & CFGTBL_ChangeReq))
1101 break;
1102 /* delay and try again */
1103 udelay(1000);
1104 }
1105 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1106 if (i >= MAX_IOCTL_CONFIG_WAIT)
1107 return -EAGAIN;
1108 return 0;
1da177e4 1109 }
1da177e4 1110 case CCISS_GETNODENAME:
7c832835
BH		 1111 {
1112 NodeName_type NodeName;
1113 int i;
1114
1115 if (!arg)
1116 return -EINVAL;
1117 for (i = 0; i < 16; i++)
1118 NodeName[i] =
1119 readb(&host->cfgtable->ServerName[i]);
1120 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1121 return -EFAULT;
1122 return 0;
1123 }
1da177e4 1124 case CCISS_SETNODENAME:
7c832835
BH		 1125 {
1126 NodeName_type NodeName;
1127 unsigned long flags;
1128 int i;
1129
1130 if (!arg)
1131 return -EINVAL;
1132 if (!capable(CAP_SYS_ADMIN))
1133 return -EPERM;
1134
1135 if (copy_from_user
1136 (NodeName, argp, sizeof(NodeName_type)))
1137 return -EFAULT;
1138
1139 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1140
1141 /* Update the field, and then ring the doorbell */
1142 for (i = 0; i < 16; i++)
1143 writeb(NodeName[i],
1144 &host->cfgtable->ServerName[i]);
1145
1146 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1147
1148 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1149 if (!(readl(host->vaddr + SA5_DOORBELL)
1150 & CFGTBL_ChangeReq))
1151 break;
1152 /* delay and try again */
1153 udelay(1000);
1154 }
1155 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1156 if (i >= MAX_IOCTL_CONFIG_WAIT)
1157 return -EAGAIN;
1158 return 0;
1159 }
1da177e4
LT		 1160
1161 case CCISS_GETHEARTBEAT:
7c832835
BH		 1162 {
1163 Heartbeat_type heartbeat;
1164
1165 if (!arg)
1166 return -EINVAL;
1167 heartbeat = readl(&host->cfgtable->HeartBeat);
1168 if (copy_to_user
1169 (argp, &heartbeat, sizeof(Heartbeat_type)))
1170 return -EFAULT;
1171 return 0;
1172 }
1da177e4 1173 case CCISS_GETBUSTYPES:
7c832835
BH		 1174 {
1175 BusTypes_type BusTypes;
1176
1177 if (!arg)
1178 return -EINVAL;
1179 BusTypes = readl(&host->cfgtable->BusTypes);
1180 if (copy_to_user
1181 (argp, &BusTypes, sizeof(BusTypes_type)))
1182 return -EFAULT;
1183 return 0;
1184 }
1da177e4 1185 case CCISS_GETFIRMVER:
7c832835
BH		 1186 {
1187 FirmwareVer_type firmware;
1da177e4 1188
7c832835
BH		 1189 if (!arg)
1190 return -EINVAL;
1191 memcpy(firmware, host->firm_ver, 4);
1da177e4 1192
7c832835
BH		 1193 if (copy_to_user
1194 (argp, firmware, sizeof(FirmwareVer_type)))
1195 return -EFAULT;
1196 return 0;
1197 }
1198 case CCISS_GETDRIVVER:
1199 {
1200 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1201
7c832835
BH		 1202 if (!arg)
1203 return -EINVAL;
1da177e4 1204
7c832835
BH		 1205 if (copy_to_user
1206 (argp, &DriverVer, sizeof(DriverVer_type)))
1207 return -EFAULT;
1208 return 0;
1209 }
1da177e4 1210
6ae5ce8e
MM		 1211 case CCISS_DEREGDISK:
1212 case CCISS_REGNEWD:
1da177e4 1213 case CCISS_REVALIDVOLS:
6ae5ce8e 1214 return rebuild_lun_table(host, 0);
7c832835
BH		 1215
1216 case CCISS_GETLUNINFO:{
1217 LogvolInfo_struct luninfo;
1218
1219 luninfo.LunID = drv->LunID;
1220 luninfo.num_opens = drv->usage_count;
1221 luninfo.num_parts = 0;
1222 if (copy_to_user(argp, &luninfo,
1223 sizeof(LogvolInfo_struct)))
1224 return -EFAULT;
1225 return 0;
1226 }
1da177e4 1227 case CCISS_PASSTHRU:
1da177e4 1228 {
7c832835
BH		 1229 IOCTL_Command_struct iocommand;
1230 CommandList_struct *c;
1231 char *buff = NULL;
1232 u64bit temp64;
1233 unsigned long flags;
6e9a4738 1234 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1235
7c832835
BH		 1236 if (!arg)
1237 return -EINVAL;
1da177e4 1238
7c832835
BH		 1239 if (!capable(CAP_SYS_RAWIO))
1240 return -EPERM;
1da177e4 1241
7c832835
BH		 1242 if (copy_from_user
1243 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1244 return -EFAULT;
1245 if ((iocommand.buf_size < 1) &&
1246 (iocommand.Request.Type.Direction != XFER_NONE)) {
1247 return -EINVAL;
1248 }
1249#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1250 /* Check kmalloc limits */
1251 if (iocommand.buf_size > 128000)
1252 return -EINVAL;
1253#endif
1254 if (iocommand.buf_size > 0) {
1255 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1256 if (buff == NULL)
1257 return -EFAULT;
1258 }
1259 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1260 /* Copy the data into the buffer we created */
1261 if (copy_from_user
1262 (buff, iocommand.buf, iocommand.buf_size)) {
1263 kfree(buff);
1264 return -EFAULT;
1265 }
1266 } else {
1267 memset(buff, 0, iocommand.buf_size);
1268 }
1269 if ((c = cmd_alloc(host, 0)) == NULL) {
1270 kfree(buff);
1271 return -ENOMEM;
1272 }
1273 // Fill in the command type
1274 c->cmd_type = CMD_IOCTL_PEND;
1275 // Fill in Command Header
1276 c->Header.ReplyQueue = 0; // unused in simple mode
1277 if (iocommand.buf_size > 0) // buffer to fill
1278 {
1279 c->Header.SGList = 1;
1280 c->Header.SGTotal = 1;
1281 } else // no buffers to fill
1282 {
1283 c->Header.SGList = 0;
1284 c->Header.SGTotal = 0;
1285 }
1286 c->Header.LUN = iocommand.LUN_info;
1287 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1288
7c832835
BH		 1289 // Fill in Request block
1290 c->Request = iocommand.Request;
1da177e4 1291
7c832835
BH		 1292 // Fill in the scatter gather information
1293 if (iocommand.buf_size > 0) {
1294 temp64.val = pci_map_single(host->pdev, buff,
1295 iocommand.buf_size,
1296 PCI_DMA_BIDIRECTIONAL);
1297 c->SG[0].Addr.lower = temp64.val32.lower;
1298 c->SG[0].Addr.upper = temp64.val32.upper;
1299 c->SG[0].Len = iocommand.buf_size;
1300 c->SG[0].Ext = 0; // we are not chaining
1301 }
1302 c->waiting = &wait;
1303
1304 /* Put the request on the tail of the request queue */
1305 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1306 addQ(&host->reqQ, c);
1307 host->Qdepth++;
1308 start_io(host);
1309 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1310
1311 wait_for_completion(&wait);
1312
1313 /* unlock the buffers from DMA */
1314 temp64.val32.lower = c->SG[0].Addr.lower;
1315 temp64.val32.upper = c->SG[0].Addr.upper;
1316 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1317 iocommand.buf_size,
1318 PCI_DMA_BIDIRECTIONAL);
1319
0a9279cc
MM		 1320 check_ioctl_unit_attention(host, c);
1321
7c832835
BH		 1322 /* Copy the error information out */
1323 iocommand.error_info = *(c->err_info);
1324 if (copy_to_user
1325 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1326 kfree(buff);
1da177e4
LT		 1327 cmd_free(host, c, 0);
1328 return -EFAULT;
1329 }
7c832835
BH		 1330
1331 if (iocommand.Request.Type.Direction == XFER_READ) {
1332 /* Copy the data out of the buffer we created */
1333 if (copy_to_user
1334 (iocommand.buf, buff, iocommand.buf_size)) {
1335 kfree(buff);
1336 cmd_free(host, c, 0);
1337 return -EFAULT;
1338 }
1339 }
1340 kfree(buff);
1341 cmd_free(host, c, 0);
1342 return 0;
1da177e4 1343 }
7c832835
BH		 1344 case CCISS_BIG_PASSTHRU:{
1345 BIG_IOCTL_Command_struct *ioc;
1346 CommandList_struct *c;
1347 unsigned char **buff = NULL;
1348 int *buff_size = NULL;
1349 u64bit temp64;
1350 unsigned long flags;
1351 BYTE sg_used = 0;
1352 int status = 0;
1353 int i;
6e9a4738 1354 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1355 __u32 left;
1356 __u32 sz;
1357 BYTE __user *data_ptr;
1358
1359 if (!arg)
1360 return -EINVAL;
1361 if (!capable(CAP_SYS_RAWIO))
1362 return -EPERM;
1363 ioc = (BIG_IOCTL_Command_struct *)
1364 kmalloc(sizeof(*ioc), GFP_KERNEL);
1365 if (!ioc) {
1366 status = -ENOMEM;
1367 goto cleanup1;
1368 }
1369 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1370 status = -EFAULT;
1371 goto cleanup1;
1372 }
1373 if ((ioc->buf_size < 1) &&
1374 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1375 status = -EINVAL;
1376 goto cleanup1;
7c832835
BH		 1377 }
1378 /* Check kmalloc limits using all SGs */
1379 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1380 status = -EINVAL;
1381 goto cleanup1;
1382 }
1383 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1384 status = -EINVAL;
1385 goto cleanup1;
1386 }
1387 buff =
1388 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1389 if (!buff) {
1da177e4
LT		 1390 status = -ENOMEM;
1391 goto cleanup1;
1392 }
5cbded58 1393 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1394 GFP_KERNEL);
1395 if (!buff_size) {
1396 status = -ENOMEM;
1397 goto cleanup1;
1398 }
1399 left = ioc->buf_size;
1400 data_ptr = ioc->buf;
1401 while (left) {
1402 sz = (left >
1403 ioc->malloc_size) ? ioc->
1404 malloc_size : left;
1405 buff_size[sg_used] = sz;
1406 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1407 if (buff[sg_used] == NULL) {
1da177e4 1408 status = -ENOMEM;
15534d38
JA		 1409 goto cleanup1;
1410 }
7c832835
BH		 1411 if (ioc->Request.Type.Direction == XFER_WRITE) {
1412 if (copy_from_user
1413 (buff[sg_used], data_ptr, sz)) {
f7108f91 1414 status = -EFAULT;
7c832835
BH		 1415 goto cleanup1;
1416 }
1417 } else {
1418 memset(buff[sg_used], 0, sz);
1419 }
1420 left -= sz;
1421 data_ptr += sz;
1422 sg_used++;
1423 }
1424 if ((c = cmd_alloc(host, 0)) == NULL) {
1425 status = -ENOMEM;
1426 goto cleanup1;
1427 }
1428 c->cmd_type = CMD_IOCTL_PEND;
1429 c->Header.ReplyQueue = 0;
1430
1431 if (ioc->buf_size > 0) {
1432 c->Header.SGList = sg_used;
1433 c->Header.SGTotal = sg_used;
1da177e4 1434 } else {
7c832835
BH		 1435 c->Header.SGList = 0;
1436 c->Header.SGTotal = 0;
1da177e4 1437 }
7c832835
BH		 1438 c->Header.LUN = ioc->LUN_info;
1439 c->Header.Tag.lower = c->busaddr;
1440
1441 c->Request = ioc->Request;
1442 if (ioc->buf_size > 0) {
1443 int i;
1444 for (i = 0; i < sg_used; i++) {
1445 temp64.val =
1446 pci_map_single(host->pdev, buff[i],
1447 buff_size[i],
1448 PCI_DMA_BIDIRECTIONAL);
1449 c->SG[i].Addr.lower =
1450 temp64.val32.lower;
1451 c->SG[i].Addr.upper =
1452 temp64.val32.upper;
1453 c->SG[i].Len = buff_size[i];
1454 c->SG[i].Ext = 0; /* we are not chaining */
1455 }
1456 }
1457 c->waiting = &wait;
1458 /* Put the request on the tail of the request queue */
1459 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1460 addQ(&host->reqQ, c);
1461 host->Qdepth++;
1462 start_io(host);
1463 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1464 wait_for_completion(&wait);
1465 /* unlock the buffers from DMA */
1466 for (i = 0; i < sg_used; i++) {
1467 temp64.val32.lower = c->SG[i].Addr.lower;
1468 temp64.val32.upper = c->SG[i].Addr.upper;
1469 pci_unmap_single(host->pdev,
1470 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1471 PCI_DMA_BIDIRECTIONAL);
1da177e4 1472 }
0a9279cc 1473 check_ioctl_unit_attention(host, c);
7c832835
BH		 1474 /* Copy the error information out */
1475 ioc->error_info = *(c->err_info);
1476 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1477 cmd_free(host, c, 0);
1478 status = -EFAULT;
1479 goto cleanup1;
1480 }
1481 if (ioc->Request.Type.Direction == XFER_READ) {
1482 /* Copy the data out of the buffer we created */
1483 BYTE __user *ptr = ioc->buf;
1484 for (i = 0; i < sg_used; i++) {
1485 if (copy_to_user
1486 (ptr, buff[i], buff_size[i])) {
1487 cmd_free(host, c, 0);
1488 status = -EFAULT;
1489 goto cleanup1;
1490 }
1491 ptr += buff_size[i];
1da177e4 1492 }
1da177e4 1493 }
7c832835
BH		 1494 cmd_free(host, c, 0);
1495 status = 0;
1496 cleanup1:
1497 if (buff) {
1498 for (i = 0; i < sg_used; i++)
1499 kfree(buff[i]);
1500 kfree(buff);
1501 }
1502 kfree(buff_size);
1503 kfree(ioc);
1504 return status;
1da177e4 1505 }
03bbfee5
MMOD		 1506
1507 /* scsi_cmd_ioctl handles these, below, though some are not */
1508 /* very meaningful for cciss. SG_IO is the main one people want. */
1509
1510 case SG_GET_VERSION_NUM:
1511 case SG_SET_TIMEOUT:
1512 case SG_GET_TIMEOUT:
1513 case SG_GET_RESERVED_SIZE:
1514 case SG_SET_RESERVED_SIZE:
1515 case SG_EMULATED_HOST:
1516 case SG_IO:
1517 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1518 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1519
1520 /* scsi_cmd_ioctl would normally handle these, below, but */
1521 /* they aren't a good fit for cciss, as CD-ROMs are */
1522 /* not supported, and we don't have any bus/target/lun */
1523 /* which we present to the kernel. */
1524
1525 case CDROM_SEND_PACKET:
1526 case CDROMCLOSETRAY:
1527 case CDROMEJECT:
1528 case SCSI_IOCTL_GET_IDLUN:
1529 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1530 default:
1531 return -ENOTTY;
1532 }
1da177e4
LT		 1533}
1534
7b30f092
JA		 1535static void cciss_check_queues(ctlr_info_t *h)
1536{
1537 int start_queue = h->next_to_run;
1538 int i;
1539
1540 /* check to see if we have maxed out the number of commands that can
1541 * be placed on the queue. If so then exit. We do this check here
1542 * in case the interrupt we serviced was from an ioctl and did not
1543 * free any new commands.
1544 */
f880632f 1545 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1546 return;
1547
1548 /* We have room on the queue for more commands. Now we need to queue
1549 * them up. We will also keep track of the next queue to run so
1550 * that every queue gets a chance to be started first.
1551 */
1552 for (i = 0; i < h->highest_lun + 1; i++) {
1553 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1554 /* make sure the disk has been added and the drive is real
1555 * because this can be called from the middle of init_one.
1556 */
1557 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1558 continue;
1559 blk_start_queue(h->gendisk[curr_queue]->queue);
1560
1561 /* check to see if we have maxed out the number of commands
1562 * that can be placed on the queue.
1563 */
f880632f 1564 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1565 if (curr_queue == start_queue) {
1566 h->next_to_run =
1567 (start_queue + 1) % (h->highest_lun + 1);
1568 break;
1569 } else {
1570 h->next_to_run = curr_queue;
1571 break;
1572 }
7b30f092
JA		 1573 }
1574 }
1575}
1576
ca1e0484
MM		 1577static void cciss_softirq_done(struct request *rq)
1578{
1579 CommandList_struct *cmd = rq->completion_data;
1580 ctlr_info_t *h = hba[cmd->ctlr];
1581 unsigned long flags;
1582 u64bit temp64;
1583 int i, ddir;
1584
1585 if (cmd->Request.Type.Direction == XFER_READ)
1586 ddir = PCI_DMA_FROMDEVICE;
1587 else
1588 ddir = PCI_DMA_TODEVICE;
1589
1590 /* command did not need to be retried */
1591 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1592 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1593 temp64.val32.lower = cmd->SG[i].Addr.lower;
1594 temp64.val32.upper = cmd->SG[i].Addr.upper;
1595 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1596 }
1597
ca1e0484
MM		 1598#ifdef CCISS_DEBUG
1599 printk("Done with %p\n", rq);
7c832835 1600#endif /* CCISS_DEBUG */
ca1e0484 1601
c3a4d78c 1602 /* set the residual count for pc requests */
ac44e5b2 1603 if (blk_pc_request(rq))
c3a4d78c 1604 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1605
c3a4d78c 1606 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1607
ca1e0484 1608 spin_lock_irqsave(&h->lock, flags);
7c832835 1609 cmd_free(h, cmd, 1);
7b30f092 1610 cciss_check_queues(h);
ca1e0484
MM		 1611 spin_unlock_irqrestore(&h->lock, flags);
1612}
1613
b57695fe 1614static void log_unit_to_scsi3addr(ctlr_info_t *h, unsigned char scsi3addr[],
1615 uint32_t log_unit)
1616{
1617 log_unit = h->drv[log_unit].LunID & 0x03fff;
1618 memset(&scsi3addr[4], 0, 4);
1619 memcpy(&scsi3addr[0], &log_unit, 4);
1620 scsi3addr[3] |= 0x40;
1621}
1622
7fe06326
AP		 1623/* This function gets the SCSI vendor, model, and revision of a logical drive
1624 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1625 * they cannot be read.
1626 */
1627static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1628 char *vendor, char *model, char *rev)
1629{
1630 int rc;
1631 InquiryData_struct *inq_buf;
b57695fe 1632 unsigned char scsi3addr[8];
7fe06326
AP		 1633
1634 *vendor = '\0';
1635 *model = '\0';
1636 *rev = '\0';
1637
1638 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1639 if (!inq_buf)
1640 return;
1641
b57695fe 1642 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1643 if (withirq)
1644 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1645 sizeof(InquiryData_struct), 0,
1646 scsi3addr, TYPE_CMD);
7fe06326
AP		 1647 else
1648 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1649 sizeof(InquiryData_struct), 0,
1650 scsi3addr, TYPE_CMD);
7fe06326
AP		 1651 if (rc == IO_OK) {
1652 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1653 vendor[VENDOR_LEN] = '\0';
1654 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1655 model[MODEL_LEN] = '\0';
1656 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1657 rev[REV_LEN] = '\0';
1658 }
1659
1660 kfree(inq_buf);
1661 return;
1662}
1663
a72da29b
MM		 1664/* This function gets the serial number of a logical drive via
1665 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1666 * number cannot be had, for whatever reason, 16 bytes of 0xff
1667 * are returned instead.
1668 */
1669static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1670 unsigned char *serial_no, int buflen)
1671{
1672#define PAGE_83_INQ_BYTES 64
1673 int rc;
1674 unsigned char *buf;
b57695fe 1675 unsigned char scsi3addr[8];
a72da29b
MM		 1676
1677 if (buflen > 16)
1678 buflen = 16;
1679 memset(serial_no, 0xff, buflen);
1680 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1681 if (!buf)
1682 return;
1683 memset(serial_no, 0, buflen);
b57695fe 1684 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1685 if (withirq)
1686 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1687 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1688 else
1689 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1690 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1691 if (rc == IO_OK)
1692 memcpy(serial_no, &buf[8], buflen);
1693 kfree(buf);
1694 return;
1695}
1696
617e1344
SC		 1697/*
1698 * cciss_add_disk sets up the block device queue for a logical drive
1699 */
1700static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1701 int drv_index)
1702{
1703 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1704 if (!disk->queue)
1705 goto init_queue_failure;
6ae5ce8e
MM		 1706 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1707 disk->major = h->major;
1708 disk->first_minor = drv_index << NWD_SHIFT;
1709 disk->fops = &cciss_fops;
617e1344
SC		 1710 if (h->drv[drv_index].dev == NULL) {
1711 if (cciss_create_ld_sysfs_entry(h, drv_index))
1712 goto cleanup_queue;
1713 }
6ae5ce8e 1714 disk->private_data = &h->drv[drv_index];
617e1344 1715 disk->driverfs_dev = h->drv[drv_index].dev;
6ae5ce8e
MM		 1716
1717 /* Set up queue information */
1718 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1719
1720 /* This is a hardware imposed limit. */
1721 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1722
1723 /* This is a limit in the driver and could be eliminated. */
1724 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1725
1726 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1727
1728 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1729
1730 disk->queue->queuedata = h;
1731
e1defc4f
MP		 1732 blk_queue_logical_block_size(disk->queue,
1733 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1734
1735 /* Make sure all queue data is written out before */
1736 /* setting h->drv[drv_index].queue, as setting this */
1737 /* allows the interrupt handler to start the queue */
1738 wmb();
1739 h->drv[drv_index].queue = disk->queue;
1740 add_disk(disk);
617e1344
SC		 1741 return 0;
1742
1743cleanup_queue:
1744 blk_cleanup_queue(disk->queue);
1745 disk->queue = NULL;
e8074f79 1746init_queue_failure:
617e1344 1747 return -1;
6ae5ce8e
MM		 1748}
1749
ddd47442 1750/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1751 * If the usage_count is zero and it is a heretofore unknown drive, or,
1752 * the drive's capacity, geometry, or serial number has changed,
1753 * then the drive information will be updated and the disk will be
1754 * re-registered with the kernel. If these conditions don't hold,
1755 * then it will be left alone for the next reboot. The exception to this
1756 * is disk 0 which will always be left registered with the kernel since it
1757 * is also the controller node. Any changes to disk 0 will show up on
1758 * the next reboot.
7c832835 1759 */
6ae5ce8e 1760static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
7c832835 1761{
ddd47442
MM		 1762 ctlr_info_t *h = hba[ctlr];
1763 struct gendisk *disk;
ddd47442
MM		 1764 InquiryData_struct *inq_buff = NULL;
1765 unsigned int block_size;
00988a35 1766 sector_t total_size;
ddd47442
MM		 1767 unsigned long flags = 0;
1768 int ret = 0;
a72da29b
MM		 1769 drive_info_struct *drvinfo;
1770
1771 /* Get information about the disk and modify the driver structure */
1772 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1773 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1774 if (inq_buff == NULL || drvinfo == NULL)
1775 goto mem_msg;
1776
1777 /* testing to see if 16-byte CDBs are already being used */
1778 if (h->cciss_read == CCISS_READ_16) {
1779 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1780 &total_size, &block_size);
1781
1782 } else {
1783 cciss_read_capacity(ctlr, drv_index, 1,
1784 &total_size, &block_size);
1785
1786 /* if read_capacity returns all F's this volume is >2TB */
1787 /* in size so we switch to 16-byte CDB's for all */
1788 /* read/write ops */
1789 if (total_size == 0xFFFFFFFFULL) {
1790 cciss_read_capacity_16(ctlr, drv_index, 1,
1791 &total_size, &block_size);
1792 h->cciss_read = CCISS_READ_16;
1793 h->cciss_write = CCISS_WRITE_16;
1794 } else {
1795 h->cciss_read = CCISS_READ_10;
1796 h->cciss_write = CCISS_WRITE_10;
1797 }
1798 }
1799
1800 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1801 inq_buff, drvinfo);
1802 drvinfo->block_size = block_size;
1803 drvinfo->nr_blocks = total_size + 1;
1804
7fe06326
AP		 1805 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1806 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1807 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1808 sizeof(drvinfo->serial_no));
1809
1810 /* Is it the same disk we already know, and nothing's changed? */
1811 if (h->drv[drv_index].raid_level != -1 &&
1812 ((memcmp(drvinfo->serial_no,
1813 h->drv[drv_index].serial_no, 16) == 0) &&
1814 drvinfo->block_size == h->drv[drv_index].block_size &&
1815 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1816 drvinfo->heads == h->drv[drv_index].heads &&
1817 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1818 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1819 /* The disk is unchanged, nothing to update */
1820 goto freeret;
a72da29b 1821
6ae5ce8e
MM		 1822 /* If we get here it's not the same disk, or something's changed,
1823 * so we need to * deregister it, and re-register it, if it's not
1824 * in use.
1825 * If the disk already exists then deregister it before proceeding
1826 * (unless it's the first disk (for the controller node).
1827 */
a72da29b
MM		 1828 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1829 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1830 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1831 h->drv[drv_index].busy_configuring = 1;
1832 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1833
6ae5ce8e
MM		 1834 /* deregister_disk sets h->drv[drv_index].queue = NULL
1835 * which keeps the interrupt handler from starting
1836 * the queue.
1837 */
a0ea8622 1838 ret = deregister_disk(h, drv_index, 0);
ddd47442
MM		 1839 h->drv[drv_index].busy_configuring = 0;
1840 }
1841
1842 /* If the disk is in use return */
1843 if (ret)
a72da29b
MM		 1844 goto freeret;
1845
6ae5ce8e
MM		 1846 /* Save the new information from cciss_geometry_inquiry
1847 * and serial number inquiry.
1848 */
a72da29b
MM		 1849 h->drv[drv_index].block_size = drvinfo->block_size;
1850 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1851 h->drv[drv_index].heads = drvinfo->heads;
1852 h->drv[drv_index].sectors = drvinfo->sectors;
1853 h->drv[drv_index].cylinders = drvinfo->cylinders;
1854 h->drv[drv_index].raid_level = drvinfo->raid_level;
1855 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1856 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1857 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1858 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1859
1860 ++h->num_luns;
1861 disk = h->gendisk[drv_index];
1862 set_capacity(disk, h->drv[drv_index].nr_blocks);
1863
6ae5ce8e
MM		 1864 /* If it's not disk 0 (drv_index != 0)
1865 * or if it was disk 0, but there was previously
1866 * no actual corresponding configured logical drive
1867 * (raid_leve == -1) then we want to update the
1868 * logical drive's information.
1869 */
361e9b07
SC		 1870 if (drv_index || first_time) {
1871 if (cciss_add_disk(h, disk, drv_index) != 0) {
1872 cciss_free_gendisk(h, drv_index);
1873 printk(KERN_WARNING "cciss:%d could not update "
1874 "disk %d\n", h->ctlr, drv_index);
1875 --h->num_luns;
1876 }
1877 }
ddd47442 1878
6ae5ce8e 1879freeret:
ddd47442 1880 kfree(inq_buff);
a72da29b 1881 kfree(drvinfo);
ddd47442 1882 return;
6ae5ce8e 1883mem_msg:
ddd47442
MM		 1884 printk(KERN_ERR "cciss: out of memory\n");
1885 goto freeret;
1886}
1887
1888/* This function will find the first index of the controllers drive array
1889 * that has a -1 for the raid_level and will return that index. This is
1890 * where new drives will be added. If the index to be returned is greater
1891 * than the highest_lun index for the controller then highest_lun is set
1892 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1893 * "controller_node" is used to know if this is a real logical drive, or just
1894 * the controller node, which determines if this counts towards highest_lun.
7c832835 1895 */
eece695f 1896static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1897{
1898 int i;
1899
7c832835
BH		 1900 for (i = 0; i < CISS_MAX_LUN; i++) {
1901 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1902 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1903 if (!controller_node)
1904 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1905 return i;
1906 }
1907 }
1908 return -1;
1909}
1910
361e9b07
SC		 1911static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
1912{
1913 put_disk(h->gendisk[drv_index]);
1914 h->gendisk[drv_index] = NULL;
1915}
1916
6ae5ce8e
MM		 1917/* cciss_add_gendisk finds a free hba[]->drv structure
1918 * and allocates a gendisk if needed, and sets the lunid
1919 * in the drvinfo structure. It returns the index into
1920 * the ->drv[] array, or -1 if none are free.
1921 * is_controller_node indicates whether highest_lun should
1922 * count this disk, or if it's only being added to provide
1923 * a means to talk to the controller in case no logical
1924 * drives have yet been configured.
1925 */
eece695f 1926static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
6ae5ce8e
MM		 1927{
1928 int drv_index;
1929
eece695f 1930 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1931 if (drv_index == -1)
1932 return -1;
8ce51966 1933
6ae5ce8e
MM		 1934 /*Check if the gendisk needs to be allocated */
1935 if (!h->gendisk[drv_index]) {
1936 h->gendisk[drv_index] =
1937 alloc_disk(1 << NWD_SHIFT);
1938 if (!h->gendisk[drv_index]) {
1939 printk(KERN_ERR "cciss%d: could not "
1940 "allocate a new disk %d\n",
1941 h->ctlr, drv_index);
1942 return -1;
1943 }
1944 }
1945 h->drv[drv_index].LunID = lunid;
097d0264
SC		 1946 if (h->drv[drv_index].dev == NULL) {
1947 if (cciss_create_ld_sysfs_entry(h, drv_index))
1948 goto err_free_disk;
1949 }
6ae5ce8e
MM		 1950 /* Don't need to mark this busy because nobody */
1951 /* else knows about this disk yet to contend */
1952 /* for access to it. */
1953 h->drv[drv_index].busy_configuring = 0;
1954 wmb();
1955 return drv_index;
7fe06326
AP		 1956
1957err_free_disk:
361e9b07 1958 cciss_free_gendisk(h, drv_index);
7fe06326 1959 return -1;
6ae5ce8e
MM		 1960}
1961
1962/* This is for the special case of a controller which
1963 * has no logical drives. In this case, we still need
1964 * to register a disk so the controller can be accessed
1965 * by the Array Config Utility.
1966 */
1967static void cciss_add_controller_node(ctlr_info_t *h)
1968{
1969 struct gendisk *disk;
1970 int drv_index;
1971
1972 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1973 return;
1974
eece695f 1975 drv_index = cciss_add_gendisk(h, 0, 1);
361e9b07
SC		 1976 if (drv_index == -1)
1977 goto error;
6ae5ce8e
MM		 1978 h->drv[drv_index].block_size = 512;
1979 h->drv[drv_index].nr_blocks = 0;
1980 h->drv[drv_index].heads = 0;
1981 h->drv[drv_index].sectors = 0;
1982 h->drv[drv_index].cylinders = 0;
1983 h->drv[drv_index].raid_level = -1;
1984 memset(h->drv[drv_index].serial_no, 0, 16);
1985 disk = h->gendisk[drv_index];
361e9b07
SC		 1986 if (cciss_add_disk(h, disk, drv_index) == 0)
1987 return;
1988 cciss_free_gendisk(h, drv_index);
1989error:
1990 printk(KERN_WARNING "cciss%d: could not "
1991 "add disk 0.\n", h->ctlr);
1992 return;
6ae5ce8e
MM		 1993}
1994
ddd47442 1995/* This function will add and remove logical drives from the Logical
d14c4ab5 1996 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 1997 * so that mount points are preserved until the next reboot. This allows
1998 * for the removal of logical drives in the middle of the drive array
1999 * without a re-ordering of those drives.
2000 * INPUT
2001 * h = The controller to perform the operations on
7c832835 2002 */
6ae5ce8e 2003static int rebuild_lun_table(ctlr_info_t *h, int first_time)
1da177e4 2004{
ddd47442
MM		 2005 int ctlr = h->ctlr;
2006 int num_luns;
2007 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2008 int return_code;
2009 int listlength = 0;
2010 int i;
2011 int drv_found;
2012 int drv_index = 0;
2013 __u32 lunid = 0;
1da177e4 2014 unsigned long flags;
ddd47442 2015
6ae5ce8e
MM		 2016 if (!capable(CAP_SYS_RAWIO))
2017 return -EPERM;
2018
ddd47442
MM		 2019 /* Set busy_configuring flag for this operation */
2020 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2021 if (h->busy_configuring) {
ddd47442
MM		 2022 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2023 return -EBUSY;
2024 }
2025 h->busy_configuring = 1;
a72da29b 2026 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2027
a72da29b
MM		 2028 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2029 if (ld_buff == NULL)
2030 goto mem_msg;
2031
2032 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2033 sizeof(ReportLunData_struct),
2034 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2035
a72da29b
MM		 2036 if (return_code == IO_OK)
2037 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2038 else { /* reading number of logical volumes failed */
2039 printk(KERN_WARNING "cciss: report logical volume"
2040 " command failed\n");
2041 listlength = 0;
2042 goto freeret;
2043 }
2044
2045 num_luns = listlength / 8; /* 8 bytes per entry */
2046 if (num_luns > CISS_MAX_LUN) {
2047 num_luns = CISS_MAX_LUN;
2048 printk(KERN_WARNING "cciss: more luns configured"
2049 " on controller than can be handled by"
2050 " this driver.\n");
2051 }
2052
6ae5ce8e
MM		 2053 if (num_luns == 0)
2054 cciss_add_controller_node(h);
2055
2056 /* Compare controller drive array to driver's drive array
2057 * to see if any drives are missing on the controller due
2058 * to action of Array Config Utility (user deletes drive)
2059 * and deregister logical drives which have disappeared.
2060 */
a72da29b
MM		 2061 for (i = 0; i <= h->highest_lun; i++) {
2062 int j;
2063 drv_found = 0;
d8a0be6a
SC		 2064
2065 /* skip holes in the array from already deleted drives */
2066 if (h->drv[i].raid_level == -1)
2067 continue;
2068
a72da29b
MM		 2069 for (j = 0; j < num_luns; j++) {
2070 memcpy(&lunid, &ld_buff->LUN[j][0], 4);
2071 lunid = le32_to_cpu(lunid);
2072 if (h->drv[i].LunID == lunid) {
2073 drv_found = 1;
2074 break;
2075 }
2076 }
2077 if (!drv_found) {
2078 /* Deregister it from the OS, it's gone. */
2079 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2080 h->drv[i].busy_configuring = 1;
2081 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
a0ea8622 2082 return_code = deregister_disk(h, i, 1);
a72da29b 2083 h->drv[i].busy_configuring = 0;
ddd47442 2084 }
a72da29b 2085 }
ddd47442 2086
a72da29b
MM		 2087 /* Compare controller drive array to driver's drive array.
2088 * Check for updates in the drive information and any new drives
2089 * on the controller due to ACU adding logical drives, or changing
2090 * a logical drive's size, etc. Reregister any new/changed drives
2091 */
2092 for (i = 0; i < num_luns; i++) {
2093 int j;
ddd47442 2094
a72da29b 2095 drv_found = 0;
ddd47442 2096
a72da29b
MM		 2097 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
2098 lunid = le32_to_cpu(lunid);
ddd47442 2099
a72da29b
MM		 2100 /* Find if the LUN is already in the drive array
2101 * of the driver. If so then update its info
2102 * if not in use. If it does not exist then find
2103 * the first free index and add it.
2104 */
2105 for (j = 0; j <= h->highest_lun; j++) {
2106 if (h->drv[j].raid_level != -1 &&
2107 h->drv[j].LunID == lunid) {
2108 drv_index = j;
2109 drv_found = 1;
2110 break;
ddd47442 2111 }
a72da29b 2112 }
ddd47442 2113
a72da29b
MM		 2114 /* check if the drive was found already in the array */
2115 if (!drv_found) {
eece695f 2116 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2117 if (drv_index == -1)
2118 goto freeret;
a72da29b 2119 }
6ae5ce8e 2120 cciss_update_drive_info(ctlr, drv_index, first_time);
a72da29b 2121 } /* end for */
ddd47442 2122
6ae5ce8e 2123freeret:
ddd47442
MM		 2124 kfree(ld_buff);
2125 h->busy_configuring = 0;
2126 /* We return -1 here to tell the ACU that we have registered/updated
2127 * all of the drives that we can and to keep it from calling us
2128 * additional times.
7c832835 2129 */
ddd47442 2130 return -1;
6ae5ce8e 2131mem_msg:
ddd47442 2132 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2133 h->busy_configuring = 0;
ddd47442
MM		 2134 goto freeret;
2135}
2136
9ddb27b4
SC		 2137static void cciss_clear_drive_info(drive_info_struct *drive_info)
2138{
2139 /* zero out the disk size info */
2140 drive_info->nr_blocks = 0;
2141 drive_info->block_size = 0;
2142 drive_info->heads = 0;
2143 drive_info->sectors = 0;
2144 drive_info->cylinders = 0;
2145 drive_info->raid_level = -1;
2146 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2147 memset(drive_info->model, 0, sizeof(drive_info->model));
2148 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2149 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2150 /*
2151 * don't clear the LUNID though, we need to remember which
2152 * one this one is.
2153 */
2154}
2155
ddd47442
MM		 2156/* This function will deregister the disk and it's queue from the
2157 * kernel. It must be called with the controller lock held and the
2158 * drv structures busy_configuring flag set. It's parameters are:
2159 *
2160 * disk = This is the disk to be deregistered
2161 * drv = This is the drive_info_struct associated with the disk to be
2162 * deregistered. It contains information about the disk used
2163 * by the driver.
2164 * clear_all = This flag determines whether or not the disk information
2165 * is going to be completely cleared out and the highest_lun
2166 * reset. Sometimes we want to clear out information about
d14c4ab5 2167 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2168 * the highest_lun should be left unchanged and the LunID
2169 * should not be cleared.
2170*/
a0ea8622 2171static int deregister_disk(ctlr_info_t *h, int drv_index,
ddd47442
MM		 2172 int clear_all)
2173{
799202cb 2174 int i;
a0ea8622
SC		 2175 struct gendisk *disk;
2176 drive_info_struct *drv;
1da177e4
LT		 2177
2178 if (!capable(CAP_SYS_RAWIO))
2179 return -EPERM;
2180
a0ea8622
SC		 2181 drv = &h->drv[drv_index];
2182 disk = h->gendisk[drv_index];
2183
1da177e4 2184 /* make sure logical volume is NOT is use */
7c832835
BH		 2185 if (clear_all || (h->gendisk[0] == disk)) {
2186 if (drv->usage_count > 1)
2187 return -EBUSY;
2188 } else if (drv->usage_count > 0)
2189 return -EBUSY;
1da177e4 2190
ddd47442
MM		 2191 /* invalidate the devices and deregister the disk. If it is disk
2192 * zero do not deregister it but just zero out it's values. This
2193 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2194 */
2195 if (h->gendisk[0] != disk) {
5a9df732 2196 struct request_queue *q = disk->queue;
097d0264 2197 if (disk->flags & GENHD_FL_UP) {
8ce51966 2198 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2199 del_gendisk(disk);
097d0264 2200 }
5a9df732
AB		 2201 if (q) {
2202 blk_cleanup_queue(q);
2203 /* Set drv->queue to NULL so that we do not try
2204 * to call blk_start_queue on this queue in the
2205 * interrupt handler
2206 */
2207 drv->queue = NULL;
2208 }
2209 /* If clear_all is set then we are deleting the logical
2210 * drive, not just refreshing its info. For drives
2211 * other than disk 0 we will call put_disk. We do not
2212 * do this for disk 0 as we need it to be able to
2213 * configure the controller.
a72da29b 2214 */
5a9df732
AB		 2215 if (clear_all){
2216 /* This isn't pretty, but we need to find the
2217 * disk in our array and NULL our the pointer.
2218 * This is so that we will call alloc_disk if
2219 * this index is used again later.
a72da29b 2220 */
5a9df732 2221 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2222 if (h->gendisk[i] == disk) {
5a9df732
AB		 2223 h->gendisk[i] = NULL;
2224 break;
799202cb 2225 }
799202cb 2226 }
5a9df732 2227 put_disk(disk);
ddd47442 2228 }
799202cb
MM		 2229 } else {
2230 set_capacity(disk, 0);
ddd47442
MM		 2231 }
2232
2233 --h->num_luns;
9ddb27b4
SC		 2234 cciss_clear_drive_info(drv);
2235
7c832835
BH		 2236 if (clear_all) {
2237 /* check to see if it was the last disk */
2238 if (drv == h->drv + h->highest_lun) {
2239 /* if so, find the new hightest lun */
2240 int i, newhighest = -1;
a72da29b 2241 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2242 /* if the disk has size > 0, it is available */
ddd47442 2243 if (h->drv[i].heads)
7c832835
BH		 2244 newhighest = i;
2245 }
2246 h->highest_lun = newhighest;
1da177e4 2247 }
ddd47442 2248
7c832835 2249 drv->LunID = 0;
ddd47442 2250 }
e2019b58 2251 return 0;
1da177e4 2252}
ddd47442 2253
b57695fe 2254static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2255 size_t size, __u8 page_code, unsigned char *scsi3addr,
2256 int cmd_type)
1da177e4 2257{
7c832835 2258 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2259 u64bit buff_dma_handle;
2260 int status = IO_OK;
2261
2262 c->cmd_type = CMD_IOCTL_PEND;
2263 c->Header.ReplyQueue = 0;
7c832835 2264 if (buff != NULL) {
1da177e4 2265 c->Header.SGList = 1;
7c832835 2266 c->Header.SGTotal = 1;
1da177e4
LT		 2267 } else {
2268 c->Header.SGList = 0;
7c832835 2269 c->Header.SGTotal = 0;
1da177e4
LT		 2270 }
2271 c->Header.Tag.lower = c->busaddr;
b57695fe 2272 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2273
2274 c->Request.Type.Type = cmd_type;
2275 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2276 switch (cmd) {
2277 case CISS_INQUIRY:
1da177e4 2278 /* are we trying to read a vital product page */
7c832835 2279 if (page_code != 0) {
1da177e4
LT		 2280 c->Request.CDB[1] = 0x01;
2281 c->Request.CDB[2] = page_code;
2282 }
2283 c->Request.CDBLen = 6;
7c832835 2284 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2285 c->Request.Type.Direction = XFER_READ;
2286 c->Request.Timeout = 0;
7c832835
BH		 2287 c->Request.CDB[0] = CISS_INQUIRY;
2288 c->Request.CDB[4] = size & 0xFF;
2289 break;
1da177e4
LT		 2290 case CISS_REPORT_LOG:
2291 case CISS_REPORT_PHYS:
7c832835 2292 /* Talking to controller so It's a physical command
1da177e4 2293 mode = 00 target = 0. Nothing to write.
7c832835 2294 */
1da177e4
LT		 2295 c->Request.CDBLen = 12;
2296 c->Request.Type.Attribute = ATTR_SIMPLE;
2297 c->Request.Type.Direction = XFER_READ;
2298 c->Request.Timeout = 0;
2299 c->Request.CDB[0] = cmd;
7c832835 2300 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2301 c->Request.CDB[7] = (size >> 16) & 0xFF;
2302 c->Request.CDB[8] = (size >> 8) & 0xFF;
2303 c->Request.CDB[9] = size & 0xFF;
2304 break;
2305
2306 case CCISS_READ_CAPACITY:
1da177e4
LT		 2307 c->Request.CDBLen = 10;
2308 c->Request.Type.Attribute = ATTR_SIMPLE;
2309 c->Request.Type.Direction = XFER_READ;
2310 c->Request.Timeout = 0;
2311 c->Request.CDB[0] = cmd;
7c832835 2312 break;
00988a35 2313 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2314 c->Request.CDBLen = 16;
2315 c->Request.Type.Attribute = ATTR_SIMPLE;
2316 c->Request.Type.Direction = XFER_READ;
2317 c->Request.Timeout = 0;
2318 c->Request.CDB[0] = cmd;
2319 c->Request.CDB[1] = 0x10;
2320 c->Request.CDB[10] = (size >> 24) & 0xFF;
2321 c->Request.CDB[11] = (size >> 16) & 0xFF;
2322 c->Request.CDB[12] = (size >> 8) & 0xFF;
2323 c->Request.CDB[13] = size & 0xFF;
2324 c->Request.Timeout = 0;
2325 c->Request.CDB[0] = cmd;
2326 break;
1da177e4
LT		 2327 case CCISS_CACHE_FLUSH:
2328 c->Request.CDBLen = 12;
2329 c->Request.Type.Attribute = ATTR_SIMPLE;
2330 c->Request.Type.Direction = XFER_WRITE;
2331 c->Request.Timeout = 0;
2332 c->Request.CDB[0] = BMIC_WRITE;
2333 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2334 break;
88f627ae 2335 case TEST_UNIT_READY:
88f627ae
SC		 2336 c->Request.CDBLen = 6;
2337 c->Request.Type.Attribute = ATTR_SIMPLE;
2338 c->Request.Type.Direction = XFER_NONE;
2339 c->Request.Timeout = 0;
2340 break;
1da177e4
LT		 2341 default:
2342 printk(KERN_WARNING
7c832835 2343 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2344 return IO_ERROR;
1da177e4
LT		 2345 }
2346 } else if (cmd_type == TYPE_MSG) {
2347 switch (cmd) {
7c832835 2348 case 0: /* ABORT message */
3da8b713 2349 c->Request.CDBLen = 12;
2350 c->Request.Type.Attribute = ATTR_SIMPLE;
2351 c->Request.Type.Direction = XFER_WRITE;
2352 c->Request.Timeout = 0;
7c832835
BH		 2353 c->Request.CDB[0] = cmd; /* abort */
2354 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2355 /* buff contains the tag of the command to abort */
2356 memcpy(&c->Request.CDB[4], buff, 8);
2357 break;
7c832835 2358 case 1: /* RESET message */
88f627ae 2359 c->Request.CDBLen = 16;
3da8b713 2360 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2361 c->Request.Type.Direction = XFER_NONE;
3da8b713 2362 c->Request.Timeout = 0;
2363 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2364 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2365 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2366 break;
1da177e4
LT		 2367 case 3: /* No-Op message */
2368 c->Request.CDBLen = 1;
2369 c->Request.Type.Attribute = ATTR_SIMPLE;
2370 c->Request.Type.Direction = XFER_WRITE;
2371 c->Request.Timeout = 0;
2372 c->Request.CDB[0] = cmd;
2373 break;
2374 default:
2375 printk(KERN_WARNING
7c832835 2376 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2377 return IO_ERROR;
2378 }
2379 } else {
2380 printk(KERN_WARNING
7c832835 2381 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2382 return IO_ERROR;
2383 }
2384 /* Fill in the scatter gather information */
2385 if (size > 0) {
2386 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2387 buff, size,
2388 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2389 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2390 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2391 c->SG[0].Len = size;
7c832835 2392 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2393 }
2394 return status;
2395}
7c832835 2396
3c2ab402 2397static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2398{
2399 switch (c->err_info->ScsiStatus) {
2400 case SAM_STAT_GOOD:
2401 return IO_OK;
2402 case SAM_STAT_CHECK_CONDITION:
2403 switch (0xf & c->err_info->SenseInfo[2]) {
2404 case 0: return IO_OK; /* no sense */
2405 case 1: return IO_OK; /* recovered error */
2406 default:
2407 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2408 "check condition, sense key = 0x%02x\n",
2409 h->ctlr, c->Request.CDB[0],
2410 c->err_info->SenseInfo[2]);
2411 }
2412 break;
2413 default:
2414 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2415 "scsi status = 0x%02x\n", h->ctlr,
2416 c->Request.CDB[0], c->err_info->ScsiStatus);
2417 break;
2418 }
2419 return IO_ERROR;
2420}
2421
789a424a 2422static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2423{
5390cfc3 2424 int return_status = IO_OK;
7c832835 2425
789a424a 2426 if (c->err_info->CommandStatus == CMD_SUCCESS)
2427 return IO_OK;
5390cfc3 2428
2429 switch (c->err_info->CommandStatus) {
2430 case CMD_TARGET_STATUS:
3c2ab402 2431 return_status = check_target_status(h, c);
5390cfc3 2432 break;
2433 case CMD_DATA_UNDERRUN:
2434 case CMD_DATA_OVERRUN:
2435 /* expected for inquiry and report lun commands */
2436 break;
2437 case CMD_INVALID:
789a424a 2438 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2439 "reported invalid\n", c->Request.CDB[0]);
2440 return_status = IO_ERROR;
2441 break;
2442 case CMD_PROTOCOL_ERR:
2443 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2444 "protocol error \n", c->Request.CDB[0]);
2445 return_status = IO_ERROR;
2446 break;
2447 case CMD_HARDWARE_ERR:
2448 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2449 " hardware error\n", c->Request.CDB[0]);
2450 return_status = IO_ERROR;
2451 break;
2452 case CMD_CONNECTION_LOST:
2453 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2454 "connection lost\n", c->Request.CDB[0]);
2455 return_status = IO_ERROR;
2456 break;
2457 case CMD_ABORTED:
2458 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2459 "aborted\n", c->Request.CDB[0]);
2460 return_status = IO_ERROR;
2461 break;
2462 case CMD_ABORT_FAILED:
2463 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2464 "abort failed\n", c->Request.CDB[0]);
2465 return_status = IO_ERROR;
2466 break;
2467 case CMD_UNSOLICITED_ABORT:
2468 printk(KERN_WARNING
2469 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2470 c->Request.CDB[0]);
789a424a 2471 return_status = IO_NEEDS_RETRY;
5390cfc3 2472 break;
2473 default:
2474 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2475 "unknown status %x\n", c->Request.CDB[0],
2476 c->err_info->CommandStatus);
2477 return_status = IO_ERROR;
7c832835 2478 }
789a424a 2479 return return_status;
2480}
2481
2482static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2483 int attempt_retry)
2484{
2485 DECLARE_COMPLETION_ONSTACK(wait);
2486 u64bit buff_dma_handle;
2487 unsigned long flags;
2488 int return_status = IO_OK;
2489
2490resend_cmd2:
2491 c->waiting = &wait;
2492 /* Put the request on the tail of the queue and send it */
2493 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2494 addQ(&h->reqQ, c);
2495 h->Qdepth++;
2496 start_io(h);
2497 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2498
2499 wait_for_completion(&wait);
2500
2501 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2502 goto command_done;
2503
2504 return_status = process_sendcmd_error(h, c);
2505
2506 if (return_status == IO_NEEDS_RETRY &&
2507 c->retry_count < MAX_CMD_RETRIES) {
2508 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2509 c->Request.CDB[0]);
2510 c->retry_count++;
2511 /* erase the old error information */
2512 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2513 return_status = IO_OK;
2514 INIT_COMPLETION(wait);
2515 goto resend_cmd2;
2516 }
5390cfc3 2517
2518command_done:
1da177e4 2519 /* unlock the buffers from DMA */
bb2a37bf
MM		 2520 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2521 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2522 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2523 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2524 return return_status;
2525}
2526
b57695fe 2527static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2528 __u8 page_code, unsigned char scsi3addr[],
2529 int cmd_type)
5390cfc3 2530{
2531 ctlr_info_t *h = hba[ctlr];
2532 CommandList_struct *c;
2533 int return_status;
2534
2535 c = cmd_alloc(h, 0);
2536 if (!c)
2537 return -ENOMEM;
b57695fe 2538 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2539 scsi3addr, cmd_type);
5390cfc3 2540 if (return_status == IO_OK)
789a424a 2541 return_status = sendcmd_withirq_core(h, c, 1);
2542
1da177e4 2543 cmd_free(h, c, 0);
7c832835 2544 return return_status;
1da177e4 2545}
7c832835 2546
1da177e4 2547static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2548 int withirq, sector_t total_size,
7c832835
BH		 2549 unsigned int block_size,
2550 InquiryData_struct *inq_buff,
2551 drive_info_struct *drv)
1da177e4
LT		 2552{
2553 int return_code;
00988a35 2554 unsigned long t;
b57695fe 2555 unsigned char scsi3addr[8];
00988a35 2556
1da177e4 2557 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2558 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2559 if (withirq)
2560 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2561 inq_buff, sizeof(*inq_buff),
2562 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2563 else
2564 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2565 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2566 TYPE_CMD);
1da177e4 2567 if (return_code == IO_OK) {
7c832835 2568 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2569 printk(KERN_WARNING
7c832835
BH		 2570 "cciss: reading geometry failed, volume "
2571 "does not support reading geometry\n");
1da177e4 2572 drv->heads = 255;
7c832835 2573 drv->sectors = 32; // Sectors per track
7f42d3b8 2574 drv->cylinders = total_size + 1;
89f97ad1 2575 drv->raid_level = RAID_UNKNOWN;
1da177e4 2576 } else {
1da177e4
LT		 2577 drv->heads = inq_buff->data_byte[6];
2578 drv->sectors = inq_buff->data_byte[7];
2579 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2580 drv->cylinders += inq_buff->data_byte[5];
2581 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2582 }
2583 drv->block_size = block_size;
97c06978 2584 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2585 t = drv->heads * drv->sectors;
2586 if (t > 1) {
97c06978
MMOD		 2587 sector_t real_size = total_size + 1;
2588 unsigned long rem = sector_div(real_size, t);
3f7705ea 2589 if (rem)
97c06978
MMOD		 2590 real_size++;
2591 drv->cylinders = real_size;
1da177e4 2592 }
7c832835 2593 } else { /* Get geometry failed */
1da177e4
LT		 2594 printk(KERN_WARNING "cciss: reading geometry failed\n");
2595 }
cc088d10 2596 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
7c832835 2597 drv->heads, drv->sectors, drv->cylinders);
1da177e4 2598}
7c832835 2599
1da177e4 2600static void
00988a35 2601cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2602 unsigned int *block_size)
1da177e4 2603{
00988a35 2604 ReadCapdata_struct *buf;
1da177e4 2605 int return_code;
b57695fe 2606 unsigned char scsi3addr[8];
1aebe187
MK		 2607
2608 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2609 if (!buf) {
00988a35
MMOD		 2610 printk(KERN_WARNING "cciss: out of memory\n");
2611 return;
2612 }
1aebe187 2613
b57695fe 2614 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2615 if (withirq)
2616 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2617 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2618 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2619 else
2620 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2621 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2622 0, scsi3addr, TYPE_CMD);
1da177e4 2623 if (return_code == IO_OK) {
4c1f2b31
AV		 2624 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2625 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2626 } else { /* read capacity command failed */
1da177e4
LT		 2627 printk(KERN_WARNING "cciss: read capacity failed\n");
2628 *total_size = 0;
2629 *block_size = BLOCK_SIZE;
2630 }
97c06978 2631 if (*total_size != 0)
7b92aadf 2632 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2633 (unsigned long long)*total_size+1, *block_size);
00988a35 2634 kfree(buf);
00988a35
MMOD		 2635}
2636
2637static void
2638cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2639{
2640 ReadCapdata_struct_16 *buf;
2641 int return_code;
b57695fe 2642 unsigned char scsi3addr[8];
1aebe187
MK		 2643
2644 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2645 if (!buf) {
00988a35
MMOD		 2646 printk(KERN_WARNING "cciss: out of memory\n");
2647 return;
2648 }
1aebe187 2649
b57695fe 2650 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2651 if (withirq) {
2652 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2653 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2654 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2655 }
2656 else {
2657 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2658 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2659 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2660 }
2661 if (return_code == IO_OK) {
4c1f2b31
AV		 2662 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2663 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2664 } else { /* read capacity command failed */
2665 printk(KERN_WARNING "cciss: read capacity failed\n");
2666 *total_size = 0;
2667 *block_size = BLOCK_SIZE;
2668 }
7b92aadf 2669 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2670 (unsigned long long)*total_size+1, *block_size);
00988a35 2671 kfree(buf);
1da177e4
LT		 2672}
2673
1da177e4
LT		 2674static int cciss_revalidate(struct gendisk *disk)
2675{
2676 ctlr_info_t *h = get_host(disk);
2677 drive_info_struct *drv = get_drv(disk);
2678 int logvol;
7c832835 2679 int FOUND = 0;
1da177e4 2680 unsigned int block_size;
00988a35 2681 sector_t total_size;
1da177e4
LT		 2682 InquiryData_struct *inq_buff = NULL;
2683
7c832835
BH		 2684 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2685 if (h->drv[logvol].LunID == drv->LunID) {
2686 FOUND = 1;
1da177e4
LT		 2687 break;
2688 }
2689 }
2690
7c832835
BH		 2691 if (!FOUND)
2692 return 1;
1da177e4 2693
7c832835
BH		 2694 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2695 if (inq_buff == NULL) {
2696 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2697 return 1;
2698 }
00988a35
MMOD		 2699 if (h->cciss_read == CCISS_READ_10) {
2700 cciss_read_capacity(h->ctlr, logvol, 1,
2701 &total_size, &block_size);
2702 } else {
2703 cciss_read_capacity_16(h->ctlr, logvol, 1,
2704 &total_size, &block_size);
2705 }
7c832835
BH		 2706 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2707 inq_buff, drv);
1da177e4 2708
e1defc4f 2709 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2710 set_capacity(disk, drv->nr_blocks);
2711
1da177e4
LT		 2712 kfree(inq_buff);
2713 return 0;
2714}
2715
2716/*
2717 * Wait polling for a command to complete.
2718 * The memory mapped FIFO is polled for the completion.
2719 * Used only at init time, interrupts from the HBA are disabled.
2720 */
2721static unsigned long pollcomplete(int ctlr)
2722{
2723 unsigned long done;
2724 int i;
2725
2726 /* Wait (up to 20 seconds) for a command to complete */
2727
2728 for (i = 20 * HZ; i > 0; i--) {
2729 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2730 if (done == FIFO_EMPTY)
2731 schedule_timeout_uninterruptible(1);
2732 else
e2019b58 2733 return done;
1da177e4
LT		 2734 }
2735 /* Invalid address to tell caller we ran out of time */
2736 return 1;
2737}
3da8b713 2738
4a4b2d76
SC		 2739/* Send command c to controller h and poll for it to complete.
2740 * Turns interrupts off on the board. Used at driver init time
2741 * and during SCSI error recovery.
1da177e4 2742 */
4a4b2d76 2743static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2744{
1da177e4
LT		 2745 int i;
2746 unsigned long complete;
4a4b2d76 2747 int status = IO_ERROR;
1da177e4 2748 u64bit buff_dma_handle;
1da177e4 2749
4a4b2d76
SC		 2750resend_cmd1:
2751
2752 /* Disable interrupt on the board. */
2753 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2754
1da177e4 2755 /* Make sure there is room in the command FIFO */
7c832835 2756 /* Actually it should be completely empty at this time */
3da8b713 2757 /* unless we are in here doing error handling for the scsi */
2758 /* tape side of the driver. */
7c832835 2759 for (i = 200000; i > 0; i--) {
1da177e4 2760 /* if fifo isn't full go */
4a4b2d76 2761 if (!(h->access.fifo_full(h)))
7c832835 2762 break;
7c832835
BH		 2763 udelay(10);
2764 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2765 " waiting!\n", h->ctlr);
7c832835 2766 }
4a4b2d76 2767 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2768 do {
4a4b2d76 2769 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2770
2771#ifdef CCISS_DEBUG
3da8b713 2772 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2773#endif /* CCISS_DEBUG */
1da177e4 2774
3da8b713 2775 if (complete == 1) {
7c832835
BH		 2776 printk(KERN_WARNING
2777 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2778 "No command list address returned!\n", h->ctlr);
3da8b713 2779 status = IO_ERROR;
3da8b713 2780 break;
2781 }
2782
72f9f132 2783 /* Make sure it's the command we're expecting. */
4a4b2d76 2784 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2785 printk(KERN_WARNING "cciss%d: Unexpected command "
2786 "completion.\n", h->ctlr);
4a4b2d76
SC		 2787 continue;
2788 }
2789
2790 /* It is our command. If no error, we're done. */
2791 if (!(complete & CISS_ERROR_BIT)) {
2792 status = IO_OK;
2793 break;
2794 }
2795
2796 /* There is an error... */
2797
2798 /* if data overrun or underun on Report command ignore it */
2799 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2800 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2801 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2802 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2803 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2804 complete = c->busaddr;
2805 status = IO_OK;
2806 break;
1da177e4 2807 }
4a4b2d76
SC		 2808
2809 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2810 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2811 h->ctlr, c);
2812 if (c->retry_count < MAX_CMD_RETRIES) {
2813 printk(KERN_WARNING "cciss%d: retrying %p\n",
2814 h->ctlr, c);
2815 c->retry_count++;
2816 /* erase the old error information */
2817 memset(c->err_info, 0, sizeof(c->err_info));
2818 goto resend_cmd1;
3da8b713 2819 }
4a4b2d76
SC		 2820 printk(KERN_WARNING "cciss%d: retried %p too many "
2821 "times\n", h->ctlr, c);
2822 status = IO_ERROR;
3c2ab402 2823 break;
4a4b2d76
SC		 2824 }
2825
2826 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2827 printk(KERN_WARNING "cciss%d: command could not be "
2828 "aborted.\n", h->ctlr);
2829 status = IO_ERROR;
3c2ab402 2830 break;
4a4b2d76
SC		 2831 }
2832
4a4b2d76 2833 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2834 status = check_target_status(h, c);
2835 break;
4a4b2d76
SC		 2836 }
2837
3c2ab402 2838 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2839 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2840 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2841 status = IO_ERROR;
3c2ab402 2842 break;
4a4b2d76
SC		 2843
2844 } while (1);
7c832835 2845
1da177e4 2846 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2847 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2848 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2849 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2850 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2851 return status;
2852}
2853
2854/*
2855 * Send a command to the controller, and wait for it to complete.
2856 * Used at init time, and during SCSI error recovery.
2857 */
2858static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2859 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2860{
2861 CommandList_struct *c;
2862 int status;
2863
2864 c = cmd_alloc(hba[ctlr], 1);
2865 if (!c) {
2866 printk(KERN_WARNING "cciss: unable to get memory");
2867 return IO_ERROR;
2868 }
b57695fe 2869 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2870 scsi3addr, cmd_type);
4a4b2d76
SC		 2871 if (status == IO_OK)
2872 status = sendcmd_core(hba[ctlr], c);
2873 cmd_free(hba[ctlr], c, 1);
e2019b58 2874 return status;
7c832835
BH		 2875}
2876
1da177e4
LT		 2877/*
2878 * Map (physical) PCI mem into (virtual) kernel space
2879 */
2880static void __iomem *remap_pci_mem(ulong base, ulong size)
2881{
7c832835
BH		 2882 ulong page_base = ((ulong) base) & PAGE_MASK;
2883 ulong page_offs = ((ulong) base) - page_base;
2884 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2885
7c832835 2886 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2887}
2888
7c832835
BH		 2889/*
2890 * Takes jobs of the Q and sends them to the hardware, then puts it on
2891 * the Q to wait for completion.
2892 */
2893static void start_io(ctlr_info_t *h)
1da177e4
LT		 2894{
2895 CommandList_struct *c;
7c832835 2896
8a3173de
JA		 2897 while (!hlist_empty(&h->reqQ)) {
2898 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2899 /* can't do anything if fifo is full */
2900 if ((h->access.fifo_full(h))) {
2901 printk(KERN_WARNING "cciss: fifo full\n");
2902 break;
2903 }
2904
7c832835 2905 /* Get the first entry from the Request Q */
8a3173de 2906 removeQ(c);
1da177e4 2907 h->Qdepth--;
7c832835
BH		 2908
2909 /* Tell the controller execute command */
1da177e4 2910 h->access.submit_command(h, c);
7c832835
BH		 2911
2912 /* Put job onto the completed Q */
8a3173de 2913 addQ(&h->cmpQ, c);
1da177e4
LT		 2914 }
2915}
7c832835 2916
1da177e4
LT		 2917/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2918/* Zeros out the error record and then resends the command back */
2919/* to the controller */
7c832835 2920static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2921{
2922 /* erase the old error information */
2923 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2924
2925 /* add it to software queue and then send it to the controller */
8a3173de 2926 addQ(&h->reqQ, c);
1da177e4 2927 h->Qdepth++;
7c832835 2928 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2929 h->maxQsinceinit = h->Qdepth;
2930
2931 start_io(h);
2932}
a9925a06 2933
1a614f50
SC		 2934static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2935 unsigned int msg_byte, unsigned int host_byte,
2936 unsigned int driver_byte)
2937{
2938 /* inverse of macros in scsi.h */
2939 return (scsi_status_byte & 0xff) |
2940 ((msg_byte & 0xff) << 8) |
2941 ((host_byte & 0xff) << 16) |
2942 ((driver_byte & 0xff) << 24);
2943}
2944
0a9279cc
MM		 2945static inline int evaluate_target_status(ctlr_info_t *h,
2946 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2947{
2948 unsigned char sense_key;
1a614f50
SC		 2949 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2950 int error_value;
2951
0a9279cc 2952 *retry_cmd = 0;
1a614f50
SC		 2953 /* If we get in here, it means we got "target status", that is, scsi status */
2954 status_byte = cmd->err_info->ScsiStatus;
2955 driver_byte = DRIVER_OK;
2956 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2957
2958 if (blk_pc_request(cmd->rq))
2959 host_byte = DID_PASSTHROUGH;
2960 else
2961 host_byte = DID_OK;
2962
2963 error_value = make_status_bytes(status_byte, msg_byte,
2964 host_byte, driver_byte);
03bbfee5 2965
1a614f50 2966 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2967 if (!blk_pc_request(cmd->rq))
2968 printk(KERN_WARNING "cciss: cmd %p "
2969 "has SCSI Status 0x%x\n",
2970 cmd, cmd->err_info->ScsiStatus);
1a614f50 2971 return error_value;
03bbfee5
MMOD		 2972 }
2973
2974 /* check the sense key */
2975 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2976 /* no status or recovered error */
1a614f50
SC		 2977 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2978 error_value = 0;
03bbfee5 2979
0a9279cc
MM		 2980 if (check_for_unit_attention(h, cmd)) {
2981 *retry_cmd = !blk_pc_request(cmd->rq);
2982 return 0;
2983 }
2984
03bbfee5 2985 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2986 if (error_value != 0)
03bbfee5
MMOD		 2987 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2988 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2989 return error_value;
03bbfee5
MMOD		 2990 }
2991
2992 /* SG_IO or similar, copy sense data back */
2993 if (cmd->rq->sense) {
2994 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2995 cmd->rq->sense_len = cmd->err_info->SenseLen;
2996 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2997 cmd->rq->sense_len);
2998 } else
2999 cmd->rq->sense_len = 0;
3000
1a614f50 3001 return error_value;
03bbfee5
MMOD		 3002}
3003
7c832835 3004/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3005 * buffers for the completed job. Note that this function does not need
3006 * to hold the hba/queue lock.
7c832835
BH		 3007 */
3008static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3009 int timeout)
1da177e4 3010{
1da177e4 3011 int retry_cmd = 0;
198b7660
MMOD		 3012 struct request *rq = cmd->rq;
3013
3014 rq->errors = 0;
7c832835 3015
1da177e4 3016 if (timeout)
1a614f50 3017 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3018
d38ae168
MMOD		 3019 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3020 goto after_error_processing;
7c832835 3021
d38ae168 3022 switch (cmd->err_info->CommandStatus) {
d38ae168 3023 case CMD_TARGET_STATUS:
0a9279cc 3024 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3025 break;
3026 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3027 if (blk_fs_request(cmd->rq)) {
3028 printk(KERN_WARNING "cciss: cmd %p has"
3029 " completed with data underrun "
3030 "reported\n", cmd);
c3a4d78c 3031 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3032 }
d38ae168
MMOD		 3033 break;
3034 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3035 if (blk_fs_request(cmd->rq))
3036 printk(KERN_WARNING "cciss: cmd %p has"
3037 " completed with data overrun "
3038 "reported\n", cmd);
d38ae168
MMOD		 3039 break;
3040 case CMD_INVALID:
3041 printk(KERN_WARNING "cciss: cmd %p is "
3042 "reported invalid\n", cmd);
1a614f50
SC		 3043 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3044 cmd->err_info->CommandStatus, DRIVER_OK,
3045 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3046 break;
3047 case CMD_PROTOCOL_ERR:
3048 printk(KERN_WARNING "cciss: cmd %p has "
3049 "protocol error \n", cmd);
1a614f50
SC		 3050 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3051 cmd->err_info->CommandStatus, DRIVER_OK,
3052 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3053 break;
3054 case CMD_HARDWARE_ERR:
3055 printk(KERN_WARNING "cciss: cmd %p had "
3056 " hardware error\n", cmd);
1a614f50
SC		 3057 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3058 cmd->err_info->CommandStatus, DRIVER_OK,
3059 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3060 break;
3061 case CMD_CONNECTION_LOST:
3062 printk(KERN_WARNING "cciss: cmd %p had "
3063 "connection lost\n", cmd);
1a614f50
SC		 3064 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3065 cmd->err_info->CommandStatus, DRIVER_OK,
3066 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3067 break;
3068 case CMD_ABORTED:
3069 printk(KERN_WARNING "cciss: cmd %p was "
3070 "aborted\n", cmd);
1a614f50
SC		 3071 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3072 cmd->err_info->CommandStatus, DRIVER_OK,
3073 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3074 break;
3075 case CMD_ABORT_FAILED:
3076 printk(KERN_WARNING "cciss: cmd %p reports "
3077 "abort failed\n", cmd);
1a614f50
SC		 3078 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3079 cmd->err_info->CommandStatus, DRIVER_OK,
3080 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3081 break;
3082 case CMD_UNSOLICITED_ABORT:
3083 printk(KERN_WARNING "cciss%d: unsolicited "
3084 "abort %p\n", h->ctlr, cmd);
3085 if (cmd->retry_count < MAX_CMD_RETRIES) {
3086 retry_cmd = 1;
3087 printk(KERN_WARNING
3088 "cciss%d: retrying %p\n", h->ctlr, cmd);
3089 cmd->retry_count++;
3090 } else
3091 printk(KERN_WARNING
3092 "cciss%d: %p retried too "
3093 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3094 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3095 cmd->err_info->CommandStatus, DRIVER_OK,
3096 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3097 break;
3098 case CMD_TIMEOUT:
3099 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3100 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3101 cmd->err_info->CommandStatus, DRIVER_OK,
3102 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3103 break;
3104 default:
3105 printk(KERN_WARNING "cciss: cmd %p returned "
3106 "unknown status %x\n", cmd,
3107 cmd->err_info->CommandStatus);
1a614f50
SC		 3108 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3109 cmd->err_info->CommandStatus, DRIVER_OK,
3110 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3111 }
d38ae168
MMOD		 3112
3113after_error_processing:
3114
1da177e4 3115 /* We need to return this command */
7c832835
BH		 3116 if (retry_cmd) {
3117 resend_cciss_cmd(h, cmd);
1da177e4 3118 return;
7c832835 3119 }
03bbfee5 3120 cmd->rq->completion_data = cmd;
a9925a06 3121 blk_complete_request(cmd->rq);
1da177e4
LT		 3122}
3123
7c832835
BH		 3124/*
3125 * Get a request and submit it to the controller.
1da177e4 3126 */
165125e1 3127static void do_cciss_request(struct request_queue *q)
1da177e4 3128{
7c832835 3129 ctlr_info_t *h = q->queuedata;
1da177e4 3130 CommandList_struct *c;
00988a35
MMOD		 3131 sector_t start_blk;
3132 int seg;
1da177e4
LT		 3133 struct request *creq;
3134 u64bit temp64;
3135 struct scatterlist tmp_sg[MAXSGENTRIES];
3136 drive_info_struct *drv;
3137 int i, dir;
3138
3139 /* We call start_io here in case there is a command waiting on the
3140 * queue that has not been sent.
7c832835 3141 */
1da177e4
LT		 3142 if (blk_queue_plugged(q))
3143 goto startio;
3144
7c832835 3145 queue:
9934c8c0 3146 creq = blk_peek_request(q);
1da177e4
LT		 3147 if (!creq)
3148 goto startio;
3149
089fe1b2 3150 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3151
7c832835 3152 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3153 goto full;
3154
9934c8c0 3155 blk_start_request(creq);
1da177e4
LT		 3156
3157 spin_unlock_irq(q->queue_lock);
3158
3159 c->cmd_type = CMD_RWREQ;
3160 c->rq = creq;
7c832835
BH		 3161
3162 /* fill in the request */
1da177e4 3163 drv = creq->rq_disk->private_data;
7c832835 3164 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3165 /* got command from pool, so use the command block index instead */
3166 /* for direct lookups. */
3167 /* The first 2 bits are reserved for controller error reporting. */
3168 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835
BH		 3169 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
3170 c->Header.LUN.LogDev.VolId = drv->LunID;
1da177e4 3171 c->Header.LUN.LogDev.Mode = 1;
7c832835
BH		 3172 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3173 c->Request.Type.Type = TYPE_CMD; // It is a command.
3174 c->Request.Type.Attribute = ATTR_SIMPLE;
3175 c->Request.Type.Direction =
a52de245 3176 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3177 c->Request.Timeout = 0; // Don't time out
3178 c->Request.CDB[0] =
00988a35 3179 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3180 start_blk = blk_rq_pos(creq);
1da177e4 3181#ifdef CCISS_DEBUG
83096ebf
TH		 3182 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3183 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3184#endif /* CCISS_DEBUG */
1da177e4 3185
45711f1a 3186 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3187 seg = blk_rq_map_sg(q, creq, tmp_sg);
3188
7c832835 3189 /* get the DMA records for the setup */
1da177e4
LT		 3190 if (c->Request.Type.Direction == XFER_READ)
3191 dir = PCI_DMA_FROMDEVICE;
3192 else
3193 dir = PCI_DMA_TODEVICE;
3194
7c832835 3195 for (i = 0; i < seg; i++) {
1da177e4 3196 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3197 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3198 tmp_sg[i].offset,
3199 tmp_sg[i].length, dir);
1da177e4 3200 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3201 c->SG[i].Addr.upper = temp64.val32.upper;
3202 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3203 }
7c832835
BH		 3204 /* track how many SG entries we are using */
3205 if (seg > h->maxSG)
3206 h->maxSG = seg;
1da177e4
LT		 3207
3208#ifdef CCISS_DEBUG
83096ebf
TH		 3209 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3210 blk_rq_sectors(creq), seg);
7c832835 3211#endif /* CCISS_DEBUG */
1da177e4
LT		 3212
3213 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3214 if (likely(blk_fs_request(creq))) {
3215 if(h->cciss_read == CCISS_READ_10) {
3216 c->Request.CDB[1] = 0;
3217 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3218 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3219 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3220 c->Request.CDB[5] = start_blk & 0xff;
3221 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3222 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3223 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3224 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3225 } else {
582539e5
RD		 3226 u32 upper32 = upper_32_bits(start_blk);
3227
03bbfee5
MMOD		 3228 c->Request.CDBLen = 16;
3229 c->Request.CDB[1]= 0;
582539e5
RD		 3230 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3231 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3232 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3233 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3234 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3235 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3236 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3237 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3238 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3239 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3240 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3241 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3242 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3243 }
3244 } else if (blk_pc_request(creq)) {
3245 c->Request.CDBLen = creq->cmd_len;
3246 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3247 } else {
03bbfee5
MMOD		 3248 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3249 BUG();
00988a35 3250 }
1da177e4
LT		 3251
3252 spin_lock_irq(q->queue_lock);
3253
8a3173de 3254 addQ(&h->reqQ, c);
1da177e4 3255 h->Qdepth++;
7c832835
BH		 3256 if (h->Qdepth > h->maxQsinceinit)
3257 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3258
3259 goto queue;
00988a35 3260full:
1da177e4 3261 blk_stop_queue(q);
00988a35 3262startio:
1da177e4
LT		 3263 /* We will already have the driver lock here so not need
3264 * to lock it.
7c832835 3265 */
1da177e4
LT		 3266 start_io(h);
3267}
3268
3da8b713 3269static inline unsigned long get_next_completion(ctlr_info_t *h)
3270{
3da8b713 3271 return h->access.command_completed(h);
3da8b713 3272}
3273
3274static inline int interrupt_pending(ctlr_info_t *h)
3275{
3da8b713 3276 return h->access.intr_pending(h);
3da8b713 3277}
3278
3279static inline long interrupt_not_for_us(ctlr_info_t *h)
3280{
7c832835 3281 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3282 (h->interrupts_enabled == 0)));
3da8b713 3283}
3284
7d12e780 3285static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3286{
3287 ctlr_info_t *h = dev_id;
3288 CommandList_struct *c;
3289 unsigned long flags;
33079b21 3290 __u32 a, a1, a2;
1da177e4 3291
3da8b713 3292 if (interrupt_not_for_us(h))
1da177e4 3293 return IRQ_NONE;
1da177e4
LT		 3294 /*
3295 * If there are completed commands in the completion queue,
3296 * we had better do something about it.
3297 */
3298 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3299 while (interrupt_pending(h)) {
7c832835 3300 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3301 a1 = a;
33079b21
MM		 3302 if ((a & 0x04)) {
3303 a2 = (a >> 3);
f880632f 3304 if (a2 >= h->nr_cmds) {
7c832835
BH		 3305 printk(KERN_WARNING
3306 "cciss: controller cciss%d failed, stopping.\n",
3307 h->ctlr);
33079b21
MM		 3308 fail_all_cmds(h->ctlr);
3309 return IRQ_HANDLED;
3310 }
3311
3312 c = h->cmd_pool + a2;
3313 a = c->busaddr;
3314
3315 } else {
8a3173de
JA		 3316 struct hlist_node *tmp;
3317
7c832835 3318 a &= ~3;
8a3173de
JA		 3319 c = NULL;
3320 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3321 if (c->busaddr == a)
7c832835
BH		 3322 break;
3323 }
33079b21 3324 }
1da177e4
LT		 3325 /*
3326 * If we've found the command, take it off the
3327 * completion Q and free it
3328 */
8a3173de
JA		 3329 if (c && c->busaddr == a) {
3330 removeQ(c);
1da177e4
LT		 3331 if (c->cmd_type == CMD_RWREQ) {
3332 complete_command(h, c, 0);
3333 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3334 complete(c->waiting);
3335 }
3336# ifdef CONFIG_CISS_SCSI_TAPE
3337 else if (c->cmd_type == CMD_SCSI)
3338 complete_scsi_command(c, 0, a1);
3339# endif
3340 continue;
3341 }
3342 }
3343 }
3344
1da177e4
LT		 3345 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3346 return IRQ_HANDLED;
3347}
7c832835 3348
b368c9dd
AP		 3349/**
3350 * add_to_scan_list() - add controller to rescan queue
3351 * @h: Pointer to the controller.
3352 *
3353 * Adds the controller to the rescan queue if not already on the queue.
3354 *
3355 * returns 1 if added to the queue, 0 if skipped (could be on the
3356 * queue already, or the controller could be initializing or shutting
3357 * down).
3358 **/
3359static int add_to_scan_list(struct ctlr_info *h)
3360{
3361 struct ctlr_info *test_h;
3362 int found = 0;
3363 int ret = 0;
3364
3365 if (h->busy_initializing)
3366 return 0;
3367
3368 if (!mutex_trylock(&h->busy_shutting_down))
3369 return 0;
3370
3371 mutex_lock(&scan_mutex);
3372 list_for_each_entry(test_h, &scan_q, scan_list) {
3373 if (test_h == h) {
3374 found = 1;
3375 break;
3376 }
3377 }
3378 if (!found && !h->busy_scanning) {
3379 INIT_COMPLETION(h->scan_wait);
3380 list_add_tail(&h->scan_list, &scan_q);
3381 ret = 1;
3382 }
3383 mutex_unlock(&scan_mutex);
3384 mutex_unlock(&h->busy_shutting_down);
3385
3386 return ret;
3387}
3388
3389/**
3390 * remove_from_scan_list() - remove controller from rescan queue
3391 * @h: Pointer to the controller.
3392 *
3393 * Removes the controller from the rescan queue if present. Blocks if
3394 * the controller is currently conducting a rescan.
3395 **/
3396static void remove_from_scan_list(struct ctlr_info *h)
3397{
3398 struct ctlr_info *test_h, *tmp_h;
3399 int scanning = 0;
3400
3401 mutex_lock(&scan_mutex);
3402 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3403 if (test_h == h) {
3404 list_del(&h->scan_list);
3405 complete_all(&h->scan_wait);
3406 mutex_unlock(&scan_mutex);
3407 return;
3408 }
3409 }
3410 if (&h->busy_scanning)
3411 scanning = 0;
3412 mutex_unlock(&scan_mutex);
3413
3414 if (scanning)
3415 wait_for_completion(&h->scan_wait);
3416}
3417
3418/**
3419 * scan_thread() - kernel thread used to rescan controllers
3420 * @data: Ignored.
3421 *
3422 * A kernel thread used scan for drive topology changes on
3423 * controllers. The thread processes only one controller at a time
3424 * using a queue. Controllers are added to the queue using
3425 * add_to_scan_list() and removed from the queue either after done
3426 * processing or using remove_from_scan_list().
3427 *
3428 * returns 0.
3429 **/
0a9279cc
MM		 3430static int scan_thread(void *data)
3431{
b368c9dd 3432 struct ctlr_info *h;
0a9279cc 3433
b368c9dd
AP		 3434 while (1) {
3435 set_current_state(TASK_INTERRUPTIBLE);
3436 schedule();
0a9279cc
MM		 3437 if (kthread_should_stop())
3438 break;
b368c9dd
AP		 3439
3440 while (1) {
3441 mutex_lock(&scan_mutex);
3442 if (list_empty(&scan_q)) {
3443 mutex_unlock(&scan_mutex);
3444 break;
3445 }
3446
3447 h = list_entry(scan_q.next,
3448 struct ctlr_info,
3449 scan_list);
3450 list_del(&h->scan_list);
3451 h->busy_scanning = 1;
3452 mutex_unlock(&scan_mutex);
3453
3454 if (h) {
3455 rebuild_lun_table(h, 0);
3456 complete_all(&h->scan_wait);
3457 mutex_lock(&scan_mutex);
3458 h->busy_scanning = 0;
3459 mutex_unlock(&scan_mutex);
3460 }
3461 }
0a9279cc 3462 }
b368c9dd 3463
0a9279cc
MM		 3464 return 0;
3465}
3466
3467static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3468{
3469 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3470 return 0;
3471
3472 switch (c->err_info->SenseInfo[12]) {
3473 case STATE_CHANGED:
3474 printk(KERN_WARNING "cciss%d: a state change "
3475 "detected, command retried\n", h->ctlr);
3476 return 1;
3477 break;
3478 case LUN_FAILED:
3479 printk(KERN_WARNING "cciss%d: LUN failure "
3480 "detected, action required\n", h->ctlr);
3481 return 1;
3482 break;
3483 case REPORT_LUNS_CHANGED:
3484 printk(KERN_WARNING "cciss%d: report LUN data "
3485 "changed\n", h->ctlr);
b368c9dd
AP		 3486 add_to_scan_list(h);
3487 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3488 return 1;
3489 break;
3490 case POWER_OR_RESET:
3491 printk(KERN_WARNING "cciss%d: a power on "
3492 "or device reset detected\n", h->ctlr);
3493 return 1;
3494 break;
3495 case UNIT_ATTENTION_CLEARED:
3496 printk(KERN_WARNING "cciss%d: unit attention "
3497 "cleared by another initiator\n", h->ctlr);
3498 return 1;
3499 break;
3500 default:
3501 printk(KERN_WARNING "cciss%d: unknown "
3502 "unit attention detected\n", h->ctlr);
3503 return 1;
3504 }
3505}
3506
7c832835 3507/*
d14c4ab5 3508 * We cannot read the structure directly, for portability we must use
1da177e4 3509 * the io functions.
7c832835 3510 * This is for debug only.
1da177e4
LT		 3511 */
3512#ifdef CCISS_DEBUG
7c832835 3513static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3514{
3515 int i;
3516 char temp_name[17];
3517
3518 printk("Controller Configuration information\n");
3519 printk("------------------------------------\n");
7c832835 3520 for (i = 0; i < 4; i++)
1da177e4 3521 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3522 temp_name[4] = '\0';
3523 printk(" Signature = %s\n", temp_name);
1da177e4 3524 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3525 printk(" Transport methods supported = 0x%x\n",
3526 readl(&(tb->TransportSupport)));
3527 printk(" Transport methods active = 0x%x\n",
3528 readl(&(tb->TransportActive)));
3529 printk(" Requested transport Method = 0x%x\n",
3530 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3531 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3532 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3533 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3534 readl(&(tb->HostWrite.CoalIntCount)));
3535 printk(" Max outstanding commands = 0x%d\n",
3536 readl(&(tb->CmdsOutMax)));
3537 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3538 for (i = 0; i < 16; i++)
1da177e4
LT		 3539 temp_name[i] = readb(&(tb->ServerName[i]));
3540 temp_name[16] = '\0';
3541 printk(" Server Name = %s\n", temp_name);
7c832835 3542 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3543}
7c832835 3544#endif /* CCISS_DEBUG */
1da177e4 3545
7c832835 3546static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3547{
3548 int i, offset, mem_type, bar_type;
7c832835 3549 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3550 return 0;
3551 offset = 0;
7c832835
BH		 3552 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3553 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3554 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3555 offset += 4;
3556 else {
3557 mem_type = pci_resource_flags(pdev, i) &
7c832835 3558 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3559 switch (mem_type) {
7c832835
BH		 3560 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3561 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3562 offset += 4; /* 32 bit */
3563 break;
3564 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3565 offset += 8;
3566 break;
3567 default: /* reserved in PCI 2.2 */
3568 printk(KERN_WARNING
3569 "Base address is invalid\n");
3570 return -1;
1da177e4
LT		 3571 break;
3572 }
3573 }
7c832835
BH		 3574 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3575 return i + 1;
1da177e4
LT		 3576 }
3577 return -1;
3578}
3579
fb86a35b
MM		 3580/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3581 * controllers that are capable. If not, we use IO-APIC mode.
3582 */
3583
7c832835
BH		 3584static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3585 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3586{
3587#ifdef CONFIG_PCI_MSI
7c832835
BH		 3588 int err;
3589 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3590 {0, 2}, {0, 3}
3591 };
fb86a35b
MM		 3592
3593 /* Some boards advertise MSI but don't really support it */
3594 if ((board_id == 0x40700E11) ||
7c832835
BH		 3595 (board_id == 0x40800E11) ||
3596 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3597 goto default_int_mode;
3598
7c832835
BH		 3599 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3600 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3601 if (!err) {
3602 c->intr[0] = cciss_msix_entries[0].vector;
3603 c->intr[1] = cciss_msix_entries[1].vector;
3604 c->intr[2] = cciss_msix_entries[2].vector;
3605 c->intr[3] = cciss_msix_entries[3].vector;
3606 c->msix_vector = 1;
3607 return;
3608 }
3609 if (err > 0) {
3610 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3611 "available\n", err);
1ecb9c0f 3612 goto default_int_mode;
7c832835
BH		 3613 } else {
3614 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3615 err);
1ecb9c0f 3616 goto default_int_mode;
7c832835
BH		 3617 }
3618 }
3619 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3620 if (!pci_enable_msi(pdev)) {
7c832835 3621 c->msi_vector = 1;
7c832835
BH		 3622 } else {
3623 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3624 }
3625 }
1ecb9c0f 3626default_int_mode:
7c832835 3627#endif /* CONFIG_PCI_MSI */
fb86a35b 3628 /* if we get here we're going to use the default interrupt mode */
7c832835 3629 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3630 return;
3631}
3632
7d1fd970 3633static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3634{
3635 ushort subsystem_vendor_id, subsystem_device_id, command;
3636 __u32 board_id, scratchpad = 0;
3637 __u64 cfg_offset;
3638 __u32 cfg_base_addr;
3639 __u64 cfg_base_addr_index;
c33ac89b 3640 int i, err;
1da177e4
LT		 3641
3642 /* check to see if controller has been disabled */
3643 /* BEFORE trying to enable it */
7c832835
BH		 3644 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3645 if (!(command & 0x02)) {
3646 printk(KERN_WARNING
3647 "cciss: controller appears to be disabled\n");
c33ac89b 3648 return -ENODEV;
1da177e4
LT		 3649 }
3650
c33ac89b 3651 err = pci_enable_device(pdev);
7c832835 3652 if (err) {
1da177e4 3653 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3654 return err;
1da177e4 3655 }
1da177e4 3656
4e570309
BH		 3657 err = pci_request_regions(pdev, "cciss");
3658 if (err) {
3659 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3660 "aborting\n");
872225ca 3661 return err;
4e570309
BH		 3662 }
3663
1da177e4
LT		 3664 subsystem_vendor_id = pdev->subsystem_vendor;
3665 subsystem_device_id = pdev->subsystem_device;
3666 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3667 subsystem_vendor_id);
1da177e4 3668
1da177e4
LT		 3669#ifdef CCISS_DEBUG
3670 printk("command = %x\n", command);
3671 printk("irq = %x\n", pdev->irq);
3672 printk("board_id = %x\n", board_id);
7c832835 3673#endif /* CCISS_DEBUG */
1da177e4 3674
fb86a35b
MM		 3675/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3676 * else we use the IO-APIC interrupt assigned to us by system ROM.
3677 */
3678 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3679
e1438581
MM		 3680 /* find the memory BAR */
3681 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3682 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3683 break;
3684 }
3685 if (i == DEVICE_COUNT_RESOURCE) {
3686 printk(KERN_WARNING "cciss: No memory BAR found\n");
3687 err = -ENODEV;
3688 goto err_out_free_res;
3689 }
3690
3691 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3692 * already removed
3693 */
1da177e4 3694
1da177e4 3695#ifdef CCISS_DEBUG
9f92f471 3696 printk("address 0 = %lx\n", c->paddr);
7c832835 3697#endif /* CCISS_DEBUG */
a5b92873 3698 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3699
3700 /* Wait for the board to become ready. (PCI hotplug needs this.)
3701 * We poll for up to 120 secs, once per 100ms. */
7c832835 3702 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3703 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3704 if (scratchpad == CCISS_FIRMWARE_READY)
3705 break;
3706 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3707 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3708 }
3709 if (scratchpad != CCISS_FIRMWARE_READY) {
3710 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3711 err = -ENODEV;
4e570309 3712 goto err_out_free_res;
1da177e4
LT		 3713 }
3714
3715 /* get the address index number */
3716 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3717 cfg_base_addr &= (__u32) 0x0000ffff;
3718#ifdef CCISS_DEBUG
3719 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3720#endif /* CCISS_DEBUG */
3721 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3722#ifdef CCISS_DEBUG
9f92f471
RD		 3723 printk("cfg base address index = %llx\n",
3724 (unsigned long long)cfg_base_addr_index);
7c832835 3725#endif /* CCISS_DEBUG */
1da177e4
LT		 3726 if (cfg_base_addr_index == -1) {
3727 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3728 err = -ENODEV;
4e570309 3729 goto err_out_free_res;
1da177e4
LT		 3730 }
3731
3732 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3733#ifdef CCISS_DEBUG
9f92f471 3734 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3735#endif /* CCISS_DEBUG */
3736 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3737 cfg_base_addr_index) +
3738 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3739 c->board_id = board_id;
3740
3741#ifdef CCISS_DEBUG
945f390f 3742 print_cfg_table(c->cfgtable);
7c832835 3743#endif /* CCISS_DEBUG */
1da177e4 3744
49153998
MM		 3745 /* Some controllers support Zero Memory Raid (ZMR).
3746 * When configured in ZMR mode the number of supported
3747 * commands drops to 64. So instead of just setting an
3748 * arbitrary value we make the driver a little smarter.
3749 * We read the config table to tell us how many commands
3750 * are supported on the controller then subtract 4 to
3751 * leave a little room for ioctl calls.
3752 */
3753 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3754 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3755 if (board_id == products[i].board_id) {
3756 c->product_name = products[i].product_name;
3757 c->access = *(products[i].access);
49153998 3758 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3759 break;
3760 }
3761 }
7c832835
BH		 3762 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3763 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3764 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3765 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3766 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3767 err = -ENODEV;
4e570309 3768 goto err_out_free_res;
1da177e4 3769 }
4ff9a9a4
MM		 3770 /* We didn't find the controller in our list. We know the
3771 * signature is valid. If it's an HP device let's try to
3772 * bind to the device and fire it up. Otherwise we bail.
3773 */
3774 if (i == ARRAY_SIZE(products)) {
3775 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3776 c->product_name = products[i-1].product_name;
3777 c->access = *(products[i-1].access);
49153998 3778 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3779 printk(KERN_WARNING "cciss: This is an unknown "
3780 "Smart Array controller.\n"
3781 "cciss: Please update to the latest driver "
3782 "available from www.hp.com.\n");
3783 } else {
3784 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3785 " to access the Smart Array controller %08lx\n"
3786 , (unsigned long)board_id);
3787 err = -ENODEV;
3788 goto err_out_free_res;
3789 }
3790 }
1da177e4 3791#ifdef CONFIG_X86
7c832835
BH		 3792 {
3793 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3794 __u32 prefetch;
3795 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3796 prefetch |= 0x100;
3797 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3798 }
1da177e4
LT		 3799#endif
3800
8bf50f71
MMOD		 3801 /* Disabling DMA prefetch and refetch for the P600.
3802 * An ASIC bug may result in accesses to invalid memory addresses.
3803 * We've disabled prefetch for some time now. Testing with XEN
3804 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3805 */
3806 if(board_id == 0x3225103C) {
3807 __u32 dma_prefetch;
8bf50f71 3808 __u32 dma_refetch;
f92e2f5f
MM		 3809 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3810 dma_prefetch |= 0x8000;
3811 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3812 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3813 dma_refetch |= 0x1;
3814 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3815 }
3816
1da177e4
LT		 3817#ifdef CCISS_DEBUG
3818 printk("Trying to put board into Simple mode\n");
7c832835 3819#endif /* CCISS_DEBUG */
1da177e4 3820 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3821 /* Update the field, and then ring the doorbell */
3822 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3823 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3824
3825 /* under certain very rare conditions, this can take awhile.
3826 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3827 * as we enter this code.) */
7c832835 3828 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3829 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3830 break;
3831 /* delay and try again */
3832 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3833 schedule_timeout(msecs_to_jiffies(1));
7c832835 3834 }
1da177e4
LT		 3835
3836#ifdef CCISS_DEBUG
7c832835
BH		 3837 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3838 readl(c->vaddr + SA5_DOORBELL));
3839#endif /* CCISS_DEBUG */
1da177e4 3840#ifdef CCISS_DEBUG
7c832835
BH		 3841 print_cfg_table(c->cfgtable);
3842#endif /* CCISS_DEBUG */
1da177e4 3843
7c832835 3844 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3845 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3846 " simple mode\n");
c33ac89b 3847 err = -ENODEV;
4e570309 3848 goto err_out_free_res;
1da177e4
LT		 3849 }
3850 return 0;
3851
5faad620 3852err_out_free_res:
872225ca
MM		 3853 /*
3854 * Deliberately omit pci_disable_device(): it does something nasty to
3855 * Smart Array controllers that pci_enable_device does not undo
3856 */
4e570309 3857 pci_release_regions(pdev);
c33ac89b 3858 return err;
1da177e4
LT		 3859}
3860
6ae5ce8e
MM		 3861/* Function to find the first free pointer into our hba[] array
3862 * Returns -1 if no free entries are left.
7c832835 3863 */
1da177e4
LT		 3864static int alloc_cciss_hba(void)
3865{
799202cb 3866 int i;
1da177e4 3867
7c832835 3868 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3869 if (!hba[i]) {
3870 ctlr_info_t *p;
f2912a12 3871
06ff37ff 3872 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3873 if (!p)
3874 goto Enomem;
1da177e4
LT		 3875 hba[i] = p;
3876 return i;
3877 }
3878 }
3879 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3880 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3881 return -1;
3882Enomem:
1da177e4 3883 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3884 return -1;
3885}
3886
3887static void free_hba(int i)
3888{
3889 ctlr_info_t *p = hba[i];
3890 int n;
3891
3892 hba[i] = NULL;
799202cb 3893 for (n = 0; n < CISS_MAX_LUN; n++)
1da177e4
LT		 3894 put_disk(p->gendisk[n]);
3895 kfree(p);
3896}
3897
82eb03cf
CC		 3898/* Send a message CDB to the firmware. */
3899static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3900{
3901 typedef struct {
3902 CommandListHeader_struct CommandHeader;
3903 RequestBlock_struct Request;
3904 ErrDescriptor_struct ErrorDescriptor;
3905 } Command;
3906 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3907 Command *cmd;
3908 dma_addr_t paddr64;
3909 uint32_t paddr32, tag;
3910 void __iomem *vaddr;
3911 int i, err;
3912
3913 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3914 if (vaddr == NULL)
3915 return -ENOMEM;
3916
3917 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3918 CCISS commands, so they must be allocated from the lower 4GiB of
3919 memory. */
e930438c 3920 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3921 if (err) {
3922 iounmap(vaddr);
3923 return -ENOMEM;
3924 }
3925
3926 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3927 if (cmd == NULL) {
3928 iounmap(vaddr);
3929 return -ENOMEM;
3930 }
3931
3932 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3933 although there's no guarantee, we assume that the address is at
3934 least 4-byte aligned (most likely, it's page-aligned). */
3935 paddr32 = paddr64;
3936
3937 cmd->CommandHeader.ReplyQueue = 0;
3938 cmd->CommandHeader.SGList = 0;
3939 cmd->CommandHeader.SGTotal = 0;
3940 cmd->CommandHeader.Tag.lower = paddr32;
3941 cmd->CommandHeader.Tag.upper = 0;
3942 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3943
3944 cmd->Request.CDBLen = 16;
3945 cmd->Request.Type.Type = TYPE_MSG;
3946 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3947 cmd->Request.Type.Direction = XFER_NONE;
3948 cmd->Request.Timeout = 0; /* Don't time out */
3949 cmd->Request.CDB[0] = opcode;
3950 cmd->Request.CDB[1] = type;
3951 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3952
3953 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3954 cmd->ErrorDescriptor.Addr.upper = 0;
3955 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3956
3957 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3958
3959 for (i = 0; i < 10; i++) {
3960 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3961 if ((tag & ~3) == paddr32)
3962 break;
3963 schedule_timeout_uninterruptible(HZ);
3964 }
3965
3966 iounmap(vaddr);
3967
3968 /* we leak the DMA buffer here ... no choice since the controller could
3969 still complete the command. */
3970 if (i == 10) {
3971 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3972 opcode, type);
3973 return -ETIMEDOUT;
3974 }
3975
3976 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3977
3978 if (tag & 2) {
3979 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3980 opcode, type);
3981 return -EIO;
3982 }
3983
3984 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
3985 opcode, type);
3986 return 0;
3987}
3988
3989#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
3990#define cciss_noop(p) cciss_message(p, 3, 0)
3991
3992static __devinit int cciss_reset_msi(struct pci_dev *pdev)
3993{
3994/* the #defines are stolen from drivers/pci/msi.h. */
3995#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
3996#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
3997
3998 int pos;
3999 u16 control = 0;
4000
4001 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4002 if (pos) {
4003 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4004 if (control & PCI_MSI_FLAGS_ENABLE) {
4005 printk(KERN_INFO "cciss: resetting MSI\n");
4006 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4007 }
4008 }
4009
4010 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4011 if (pos) {
4012 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4013 if (control & PCI_MSIX_FLAGS_ENABLE) {
4014 printk(KERN_INFO "cciss: resetting MSI-X\n");
4015 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4016 }
4017 }
4018
4019 return 0;
4020}
4021
4022/* This does a hard reset of the controller using PCI power management
4023 * states. */
4024static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4025{
4026 u16 pmcsr, saved_config_space[32];
4027 int i, pos;
4028
4029 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4030
4031 /* This is very nearly the same thing as
4032
4033 pci_save_state(pci_dev);
4034 pci_set_power_state(pci_dev, PCI_D3hot);
4035 pci_set_power_state(pci_dev, PCI_D0);
4036 pci_restore_state(pci_dev);
4037
4038 but we can't use these nice canned kernel routines on
4039 kexec, because they also check the MSI/MSI-X state in PCI
4040 configuration space and do the wrong thing when it is
4041 set/cleared. Also, the pci_save/restore_state functions
4042 violate the ordering requirements for restoring the
4043 configuration space from the CCISS document (see the
4044 comment below). So we roll our own .... */
4045
4046 for (i = 0; i < 32; i++)
4047 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4048
4049 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4050 if (pos == 0) {
4051 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4052 return -ENODEV;
4053 }
4054
4055 /* Quoting from the Open CISS Specification: "The Power
4056 * Management Control/Status Register (CSR) controls the power
4057 * state of the device. The normal operating state is D0,
4058 * CSR=00h. The software off state is D3, CSR=03h. To reset
4059 * the controller, place the interface device in D3 then to
4060 * D0, this causes a secondary PCI reset which will reset the
4061 * controller." */
4062
4063 /* enter the D3hot power management state */
4064 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4065 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4066 pmcsr |= PCI_D3hot;
4067 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4068
4069 schedule_timeout_uninterruptible(HZ >> 1);
4070
4071 /* enter the D0 power management state */
4072 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4073 pmcsr |= PCI_D0;
4074 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4075
4076 schedule_timeout_uninterruptible(HZ >> 1);
4077
4078 /* Restore the PCI configuration space. The Open CISS
4079 * Specification says, "Restore the PCI Configuration
4080 * Registers, offsets 00h through 60h. It is important to
4081 * restore the command register, 16-bits at offset 04h,
4082 * last. Do not restore the configuration status register,
4083 * 16-bits at offset 06h." Note that the offset is 2*i. */
4084 for (i = 0; i < 32; i++) {
4085 if (i == 2 || i == 3)
4086 continue;
4087 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4088 }
4089 wmb();
4090 pci_write_config_word(pdev, 4, saved_config_space[2]);
4091
4092 return 0;
4093}
4094
1da177e4
LT		 4095/*
4096 * This is it. Find all the controllers and register them. I really hate
4097 * stealing all these major device numbers.
4098 * returns the number of block devices registered.
4099 */
4100static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4101 const struct pci_device_id *ent)
1da177e4 4102{
1da177e4 4103 int i;
799202cb 4104 int j = 0;
1da177e4 4105 int rc;
22bece00 4106 int dac, return_code;
212a5026 4107 InquiryData_struct *inq_buff;
1da177e4 4108
82eb03cf
CC		 4109 if (reset_devices) {
4110 /* Reset the controller with a PCI power-cycle */
4111 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4112 return -ENODEV;
4113
5e18cfd0
JA		 4114 /* Now try to get the controller to respond to a no-op. Some
4115 devices (notably the HP Smart Array 5i Controller) need
4116 up to 30 seconds to respond. */
5e4c91c8 4117 for (i=0; i<30; i++) {
82eb03cf
CC		 4118 if (cciss_noop(pdev) == 0)
4119 break;
5e4c91c8
JA		 4120
4121 schedule_timeout_uninterruptible(HZ);
4122 }
4123 if (i == 30) {
4124 printk(KERN_ERR "cciss: controller seems dead\n");
4125 return -EBUSY;
82eb03cf
CC		 4126 }
4127 }
4128
1da177e4 4129 i = alloc_cciss_hba();
7c832835 4130 if (i < 0)
e2019b58 4131 return -1;
1f8ef380
MM		 4132
4133 hba[i]->busy_initializing = 1;
8a3173de
JA		 4134 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4135 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4136 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4137
1da177e4 4138 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 4139 goto clean0;
1da177e4
LT		 4140
4141 sprintf(hba[i]->devname, "cciss%d", i);
4142 hba[i]->ctlr = i;
4143 hba[i]->pdev = pdev;
4144
b368c9dd
AP		 4145 init_completion(&hba[i]->scan_wait);
4146
7fe06326
AP		 4147 if (cciss_create_hba_sysfs_entry(hba[i]))
4148 goto clean0;
4149
1da177e4 4150 /* configure PCI DMA stuff */
6a35528a 4151 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4152 dac = 1;
284901a9 4153 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4154 dac = 0;
1da177e4 4155 else {
40aabb58 4156 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4157 goto clean1;
4158 }
4159
4160 /*
4161 * register with the major number, or get a dynamic major number
4162 * by passing 0 as argument. This is done for greater than
4163 * 8 controller support.
4164 */
4165 if (i < MAX_CTLR_ORIG)
564de74a 4166 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4167 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4168 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4169 printk(KERN_ERR
7c832835
BH		 4170 "cciss: Unable to get major number %d for %s "
4171 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4172 goto clean1;
7c832835 4173 } else {
1da177e4
LT		 4174 if (i >= MAX_CTLR_ORIG)
4175 hba[i]->major = rc;
4176 }
4177
4178 /* make sure the board interrupts are off */
4179 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4180 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4181 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4182 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4183 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4184 goto clean2;
4185 }
40aabb58
BH		 4186
4187 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4188 hba[i]->devname, pdev->device, pci_name(pdev),
4189 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4190
4191 hba[i]->cmd_pool_bits =
061837bc
JL		 4192 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4193 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4194 hba[i]->cmd_pool = (CommandList_struct *)
4195 pci_alloc_consistent(hba[i]->pdev,
f880632f 4196 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4197 &(hba[i]->cmd_pool_dhandle));
4198 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4199 pci_alloc_consistent(hba[i]->pdev,
f880632f 4200 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4201 &(hba[i]->errinfo_pool_dhandle));
4202 if ((hba[i]->cmd_pool_bits == NULL)
4203 || (hba[i]->cmd_pool == NULL)
4204 || (hba[i]->errinfo_pool == NULL)) {
4205 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4206 goto clean4;
4207 }
1da177e4 4208 spin_lock_init(&hba[i]->lock);
1da177e4 4209
7c832835
BH		 4210 /* Initialize the pdev driver private data.
4211 have it point to hba[i]. */
1da177e4 4212 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4213 /* command and error info recs zeroed out before
4214 they are used */
4215 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4216 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4217 * sizeof(unsigned long));
1da177e4 4218
6ae5ce8e
MM		 4219 hba[i]->num_luns = 0;
4220 hba[i]->highest_lun = -1;
4221 for (j = 0; j < CISS_MAX_LUN; j++) {
4222 hba[i]->drv[j].raid_level = -1;
4223 hba[i]->drv[j].queue = NULL;
4224 hba[i]->gendisk[j] = NULL;
4225 }
1da177e4
LT		 4226
4227 cciss_scsi_setup(i);
4228
4229 /* Turn the interrupts on so we can service requests */
4230 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4231
22bece00
MM		 4232 /* Get the firmware version */
4233 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4234 if (inq_buff == NULL) {
4235 printk(KERN_ERR "cciss: out of memory\n");
4236 goto clean4;
4237 }
4238
4239 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4240 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4241 if (return_code == IO_OK) {
4242 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4243 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4244 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4245 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4246 } else { /* send command failed */
4247 printk(KERN_WARNING "cciss: unable to determine firmware"
4248 " version of controller\n");
4249 }
212a5026 4250 kfree(inq_buff);
22bece00 4251
1da177e4 4252 cciss_procinit(i);
92c4231a
MM		 4253
4254 hba[i]->cciss_max_sectors = 2048;
4255
6ae5ce8e 4256 rebuild_lun_table(hba[i], 1);
b368c9dd 4257 hba[i]->busy_initializing = 0;
e2019b58 4258 return 1;
1da177e4 4259
6ae5ce8e 4260clean4:
6044ec88 4261 kfree(hba[i]->cmd_pool_bits);
7c832835 4262 if (hba[i]->cmd_pool)
1da177e4 4263 pci_free_consistent(hba[i]->pdev,
f880632f 4264 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4265 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4266 if (hba[i]->errinfo_pool)
1da177e4 4267 pci_free_consistent(hba[i]->pdev,
f880632f 4268 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4269 hba[i]->errinfo_pool,
4270 hba[i]->errinfo_pool_dhandle);
fb86a35b 4271 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4272clean2:
1da177e4 4273 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4274clean1:
7fe06326
AP		 4275 cciss_destroy_hba_sysfs_entry(hba[i]);
4276clean0:
1f8ef380 4277 hba[i]->busy_initializing = 0;
799202cb
MM		 4278 /* cleanup any queues that may have been initialized */
4279 for (j=0; j <= hba[i]->highest_lun; j++){
4280 drive_info_struct *drv = &(hba[i]->drv[j]);
4281 if (drv->queue)
4282 blk_cleanup_queue(drv->queue);
4283 }
872225ca
MM		 4284 /*
4285 * Deliberately omit pci_disable_device(): it does something nasty to
4286 * Smart Array controllers that pci_enable_device does not undo
4287 */
799202cb 4288 pci_release_regions(pdev);
799202cb 4289 pci_set_drvdata(pdev, NULL);
61808c2b 4290 free_hba(i);
e2019b58 4291 return -1;
1da177e4
LT		 4292}
4293
e9ca75b5 4294static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4295{
4296 ctlr_info_t *tmp_ptr;
e9ca75b5 4297 int i;
1da177e4 4298 char flush_buf[4];
7c832835 4299 int return_code;
1da177e4 4300
e9ca75b5
GB		 4301 tmp_ptr = pci_get_drvdata(pdev);
4302 if (tmp_ptr == NULL)
4303 return;
4304 i = tmp_ptr->ctlr;
4305 if (hba[i] == NULL)
4306 return;
4307
4308 /* Turn board interrupts off and send the flush cache command */
4309 /* sendcmd will turn off interrupt, and send the flush...
4310 * To write all data in the battery backed cache to disks */
4311 memset(flush_buf, 0, 4);
b57695fe 4312 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4313 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4314 if (return_code == IO_OK) {
4315 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4316 } else {
4317 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4318 }
4319 free_irq(hba[i]->intr[2], hba[i]);
4320}
4321
4322static void __devexit cciss_remove_one(struct pci_dev *pdev)
4323{
4324 ctlr_info_t *tmp_ptr;
4325 int i, j;
4326
7c832835
BH		 4327 if (pci_get_drvdata(pdev) == NULL) {
4328 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4329 return;
4330 }
0a9279cc 4331
1da177e4
LT		 4332 tmp_ptr = pci_get_drvdata(pdev);
4333 i = tmp_ptr->ctlr;
7c832835 4334 if (hba[i] == NULL) {
1da177e4 4335 printk(KERN_ERR "cciss: device appears to "
7c832835 4336 "already be removed \n");
1da177e4
LT		 4337 return;
4338 }
b6550777 4339
b368c9dd 4340 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4341
b368c9dd 4342 remove_from_scan_list(hba[i]);
b6550777
BH		 4343 remove_proc_entry(hba[i]->devname, proc_cciss);
4344 unregister_blkdev(hba[i]->major, hba[i]->devname);
4345
4346 /* remove it from the disk list */
4347 for (j = 0; j < CISS_MAX_LUN; j++) {
4348 struct gendisk *disk = hba[i]->gendisk[j];
4349 if (disk) {
165125e1 4350 struct request_queue *q = disk->queue;
b6550777 4351
097d0264 4352 if (disk->flags & GENHD_FL_UP) {
8ce51966 4353 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4354 del_gendisk(disk);
097d0264 4355 }
b6550777
BH		 4356 if (q)
4357 blk_cleanup_queue(q);
4358 }
4359 }
4360
ba198efb 4361#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4362 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4363#endif
b6550777 4364
e9ca75b5 4365 cciss_shutdown(pdev);
fb86a35b
MM		 4366
4367#ifdef CONFIG_PCI_MSI
7c832835
BH		 4368 if (hba[i]->msix_vector)
4369 pci_disable_msix(hba[i]->pdev);
4370 else if (hba[i]->msi_vector)
4371 pci_disable_msi(hba[i]->pdev);
4372#endif /* CONFIG_PCI_MSI */
fb86a35b 4373
1da177e4 4374 iounmap(hba[i]->vaddr);
1da177e4 4375
f880632f 4376 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4377 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4378 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4379 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4380 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4381 /*
4382 * Deliberately omit pci_disable_device(): it does something nasty to
4383 * Smart Array controllers that pci_enable_device does not undo
4384 */
7c832835 4385 pci_release_regions(pdev);
4e570309 4386 pci_set_drvdata(pdev, NULL);
7fe06326 4387 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4388 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4389 free_hba(i);
7c832835 4390}
1da177e4
LT		 4391
4392static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4393 .name = "cciss",
4394 .probe = cciss_init_one,
4395 .remove = __devexit_p(cciss_remove_one),
4396 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4397 .shutdown = cciss_shutdown,
1da177e4
LT		 4398};
4399
4400/*
4401 * This is it. Register the PCI driver information for the cards we control
7c832835 4402 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4403 */
4404static int __init cciss_init(void)
4405{
7fe06326
AP		 4406 int err;
4407
10cbda97
JA		 4408 /*
4409 * The hardware requires that commands are aligned on a 64-bit
4410 * boundary. Given that we use pci_alloc_consistent() to allocate an
4411 * array of them, the size must be a multiple of 8 bytes.
4412 */
4413 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4414
1da177e4
LT		 4415 printk(KERN_INFO DRIVER_NAME "\n");
4416
7fe06326
AP		 4417 err = bus_register(&cciss_bus_type);
4418 if (err)
4419 return err;
4420
b368c9dd
AP		 4421 /* Start the scan thread */
4422 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4423 if (IS_ERR(cciss_scan_thread)) {
4424 err = PTR_ERR(cciss_scan_thread);
4425 goto err_bus_unregister;
4426 }
4427
1da177e4 4428 /* Register for our PCI devices */
7fe06326
AP		 4429 err = pci_register_driver(&cciss_pci_driver);
4430 if (err)
b368c9dd 4431 goto err_thread_stop;
7fe06326 4432
617e1344 4433 return err;
7fe06326 4434
b368c9dd
AP		 4435err_thread_stop:
4436 kthread_stop(cciss_scan_thread);
4437err_bus_unregister:
7fe06326 4438 bus_unregister(&cciss_bus_type);
b368c9dd 4439
7fe06326 4440 return err;
1da177e4
LT		 4441}
4442
4443static void __exit cciss_cleanup(void)
4444{
4445 int i;
4446
4447 pci_unregister_driver(&cciss_pci_driver);
4448 /* double check that all controller entrys have been removed */
7c832835
BH		 4449 for (i = 0; i < MAX_CTLR; i++) {
4450 if (hba[i] != NULL) {
1da177e4 4451 printk(KERN_WARNING "cciss: had to remove"
7c832835 4452 " controller %d\n", i);
1da177e4
LT		 4453 cciss_remove_one(hba[i]->pdev);
4454 }
4455 }
b368c9dd 4456 kthread_stop(cciss_scan_thread);
928b4d8c 4457 remove_proc_entry("driver/cciss", NULL);
7fe06326 4458 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4459}
4460
33079b21
MM		 4461static void fail_all_cmds(unsigned long ctlr)
4462{
4463 /* If we get here, the board is apparently dead. */
4464 ctlr_info_t *h = hba[ctlr];
4465 CommandList_struct *c;
4466 unsigned long flags;
4467
4468 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4469 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4470
4471 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4472
7c832835 4473 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4474
4475 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4476 while (!hlist_empty(&h->reqQ)) {
4477 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4478 removeQ(c);
33079b21 4479 h->Qdepth--;
8a3173de 4480 addQ(&h->cmpQ, c);
33079b21
MM		 4481 }
4482
4483 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4484 while (!hlist_empty(&h->cmpQ)) {
4485 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4486 removeQ(c);
b59e64d0
HR		 4487 if (c->cmd_type != CMD_MSG_STALE)
4488 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4489 if (c->cmd_type == CMD_RWREQ) {
4490 complete_command(h, c, 0);
4491 } else if (c->cmd_type == CMD_IOCTL_PEND)
4492 complete(c->waiting);
4493#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4494 else if (c->cmd_type == CMD_SCSI)
4495 complete_scsi_command(c, 0, 0);
33079b21
MM		 4496#endif
4497 }
4498 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4499 return;
4500}
4501
1da177e4
LT		 4502module_init(cciss_init);
4503module_exit(cciss_cleanup);
ubuntu-bionic-kernel mirror