]> bbs.cooldavid.org Git - net-next-2.6.git/blame - drivers/block/cciss.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
cciss: clean up code in cciss_shutdown
[net-next-2.6.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1da177e4
LT		 44#include <asm/uaccess.h>
45#include <asm/io.h>
46
eb0df996 47#include <linux/dma-mapping.h>
1da177e4
LT		 48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/completion.h>
d5d3b736 51#include <scsi/scsi.h>
03bbfee5
MMOD		 52#include <scsi/sg.h>
53#include <scsi/scsi_ioctl.h>
54#include <linux/cdrom.h>
231bc2a2 55#include <linux/scatterlist.h>
0a9279cc 56#include <linux/kthread.h>
1da177e4
LT		 57
58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 61
62/* Embedded module documentation macros - see modules.h */
63MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68MODULE_VERSION("3.6.20");
1da177e4
LT		 69MODULE_LICENSE("GPL");
70
2ec24ff1
SC		 71static int cciss_allow_hpsa;
72module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
73MODULE_PARM_DESC(cciss_allow_hpsa,
74 "Prevent cciss driver from accessing hardware known to be "
75 " supported by the hpsa driver");
76
1da177e4
LT		 77#include "cciss_cmd.h"
78#include "cciss.h"
79#include <linux/cciss_ioctl.h>
80
81/* define the PCI info for the cards we can control */
82static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
90 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
91 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
1da177e4
LT		 110 {0,}
111};
7c832835 112
1da177e4
LT		 113MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
114
1da177e4
LT		 115/* board_id = Subsystem Device ID & Vendor ID
116 * product = Marketing Name for the board
7c832835 117 * access = Address of the struct of function pointers
1da177e4
LT		 118 */
119static struct board_type products[] = {
49153998
MM		 120 {0x40700E11, "Smart Array 5300", &SA5_access},
121 {0x40800E11, "Smart Array 5i", &SA5B_access},
122 {0x40820E11, "Smart Array 532", &SA5B_access},
123 {0x40830E11, "Smart Array 5312", &SA5B_access},
124 {0x409A0E11, "Smart Array 641", &SA5_access},
125 {0x409B0E11, "Smart Array 642", &SA5_access},
126 {0x409C0E11, "Smart Array 6400", &SA5_access},
127 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
128 {0x40910E11, "Smart Array 6i", &SA5_access},
129 {0x3225103C, "Smart Array P600", &SA5_access},
49153998
MM		 130 {0x3235103C, "Smart Array P400i", &SA5_access},
131 {0x3211103C, "Smart Array E200i", &SA5_access},
132 {0x3212103C, "Smart Array E200", &SA5_access},
133 {0x3213103C, "Smart Array E200i", &SA5_access},
134 {0x3214103C, "Smart Array E200i", &SA5_access},
135 {0x3215103C, "Smart Array E200i", &SA5_access},
136 {0x3237103C, "Smart Array E500", &SA5_access},
2ec24ff1
SC		 137/* controllers below this line are also supported by the hpsa driver. */
138#define HPSA_BOUNDARY 0x3223103C
139 {0x3223103C, "Smart Array P800", &SA5_access},
140 {0x3234103C, "Smart Array P400", &SA5_access},
49153998
MM		 141 {0x323D103C, "Smart Array P700m", &SA5_access},
142 {0x3241103C, "Smart Array P212", &SA5_access},
143 {0x3243103C, "Smart Array P410", &SA5_access},
144 {0x3245103C, "Smart Array P410i", &SA5_access},
145 {0x3247103C, "Smart Array P411", &SA5_access},
146 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 147 {0x324A103C, "Smart Array P712m", &SA5_access},
148 {0x324B103C, "Smart Array P711m", &SA5_access},
1da177e4
LT		 149};
150
d14c4ab5 151/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 152#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 153#define MAX_IOCTL_CONFIG_WAIT 1000
154
155/*define how many times we will try a command because of bus resets */
156#define MAX_CMD_RETRIES 3
157
1da177e4
LT		 158#define MAX_CTLR 32
159
160/* Originally cciss driver only supports 8 major numbers */
161#define MAX_CTLR_ORIG 8
162
1da177e4
LT		 163static ctlr_info_t *hba[MAX_CTLR];
164
b368c9dd
AP		 165static struct task_struct *cciss_scan_thread;
166static DEFINE_MUTEX(scan_mutex);
167static LIST_HEAD(scan_q);
168
165125e1 169static void do_cciss_request(struct request_queue *q);
7d12e780 170static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 171static int cciss_open(struct block_device *bdev, fmode_t mode);
172static int cciss_release(struct gendisk *disk, fmode_t mode);
173static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 174 unsigned int cmd, unsigned long arg);
a885c8c4 175static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 176
1da177e4 177static int cciss_revalidate(struct gendisk *disk);
2d11d993 178static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 179static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 180 int clear_all, int via_ioctl);
1da177e4 181
7b838bde 182static void cciss_read_capacity(int ctlr, int logvol,
00988a35 183 sector_t *total_size, unsigned int *block_size);
7b838bde 184static void cciss_read_capacity_16(int ctlr, int logvol,
00988a35
MMOD		 185 sector_t *total_size, unsigned int *block_size);
186static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 187 sector_t total_size,
00988a35 188 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 189 drive_info_struct *drv);
7c832835
BH		 190static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
191 __u32);
192static void start_io(ctlr_info_t *h);
193static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
7c832835
BH		 194 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
195static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 196 __u8 page_code, unsigned char scsi3addr[],
197 int cmd_type);
85cc61ae 198static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
199 int attempt_retry);
200static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 201
33079b21 202static void fail_all_cmds(unsigned long ctlr);
d6f4965d 203static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 204static int scan_thread(void *data);
205static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 206static void cciss_hba_release(struct device *dev);
207static void cciss_device_release(struct device *dev);
361e9b07 208static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
9cef0d2f 209static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
33079b21 210
1da177e4 211#ifdef CONFIG_PROC_FS
1da177e4
LT		 212static void cciss_procinit(int i);
213#else
7c832835
BH		 214static void cciss_procinit(int i)
215{
216}
217#endif /* CONFIG_PROC_FS */
1da177e4
LT		 218
219#ifdef CONFIG_COMPAT
ef7822c2
AV		 220static int cciss_compat_ioctl(struct block_device *, fmode_t,
221 unsigned, unsigned long);
1da177e4
LT		 222#endif
223
83d5cde4 224static const struct block_device_operations cciss_fops = {
7c832835 225 .owner = THIS_MODULE,
ef7822c2
AV		 226 .open = cciss_open,
227 .release = cciss_release,
228 .locked_ioctl = cciss_ioctl,
7c832835 229 .getgeo = cciss_getgeo,
1da177e4 230#ifdef CONFIG_COMPAT
ef7822c2 231 .compat_ioctl = cciss_compat_ioctl,
1da177e4 232#endif
7c832835 233 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 234};
235
236/*
237 * Enqueuing and dequeuing functions for cmdlists.
238 */
8a3173de 239static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 240{
8a3173de 241 hlist_add_head(&c->list, list);
1da177e4
LT		 242}
243
8a3173de 244static inline void removeQ(CommandList_struct *c)
1da177e4 245{
b59e64d0
HR		 246 /*
247 * After kexec/dump some commands might still
248 * be in flight, which the firmware will try
249 * to complete. Resetting the firmware doesn't work
250 * with old fw revisions, so we have to mark
251 * them off as 'stale' to prevent the driver from
252 * falling over.
253 */
254 if (WARN_ON(hlist_unhashed(&c->list))) {
255 c->cmd_type = CMD_MSG_STALE;
8a3173de 256 return;
b59e64d0 257 }
8a3173de
JA		 258
259 hlist_del_init(&c->list);
1da177e4
LT		 260}
261
262#include "cciss_scsi.c" /* For SCSI tape support */
263
1e6f2dc1
AB		 264static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
265 "UNKNOWN"
266};
267#define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
0f5486ec 268
1da177e4
LT		 269#ifdef CONFIG_PROC_FS
270
271/*
272 * Report information about this controller.
273 */
274#define ENG_GIG 1000000000
275#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 276#define ENGAGE_SCSI "engage scsi"
1da177e4
LT		 277
278static struct proc_dir_entry *proc_cciss;
279
89b6e743 280static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 281{
89b6e743
MM		 282 ctlr_info_t *h = seq->private;
283
284 seq_printf(seq, "%s: HP %s Controller\n"
285 "Board ID: 0x%08lx\n"
286 "Firmware Version: %c%c%c%c\n"
287 "IRQ: %d\n"
288 "Logical drives: %d\n"
289 "Current Q depth: %d\n"
290 "Current # commands on controller: %d\n"
291 "Max Q depth since init: %d\n"
292 "Max # commands on controller since init: %d\n"
293 "Max SG entries since init: %d\n",
294 h->devname,
295 h->product_name,
296 (unsigned long)h->board_id,
297 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
298 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
299 h->num_luns,
300 h->Qdepth, h->commands_outstanding,
301 h->maxQsinceinit, h->max_outstanding, h->maxSG);
302
303#ifdef CONFIG_CISS_SCSI_TAPE
304 cciss_seq_tape_report(seq, h->ctlr);
305#endif /* CONFIG_CISS_SCSI_TAPE */
306}
1da177e4 307
89b6e743
MM		 308static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
309{
310 ctlr_info_t *h = seq->private;
311 unsigned ctlr = h->ctlr;
312 unsigned long flags;
1da177e4
LT		 313
314 /* prevent displaying bogus info during configuration
315 * or deconfiguration of a logical volume
316 */
317 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
318 if (h->busy_configuring) {
319 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 320 return ERR_PTR(-EBUSY);
1da177e4
LT		 321 }
322 h->busy_configuring = 1;
323 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
324
89b6e743
MM		 325 if (*pos == 0)
326 cciss_seq_show_header(seq);
327
328 return pos;
329}
330
331static int cciss_seq_show(struct seq_file *seq, void *v)
332{
333 sector_t vol_sz, vol_sz_frac;
334 ctlr_info_t *h = seq->private;
335 unsigned ctlr = h->ctlr;
336 loff_t *pos = v;
9cef0d2f 337 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM		 338
339 if (*pos > h->highest_lun)
340 return 0;
341
342 if (drv->heads == 0)
343 return 0;
344
345 vol_sz = drv->nr_blocks;
346 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
347 vol_sz_frac *= 100;
348 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
349
fa52bec9 350 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 351 drv->raid_level = RAID_UNKNOWN;
352 seq_printf(seq, "cciss/c%dd%d:"
353 "\t%4u.%02uGB\tRAID %s\n",
354 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
355 raid_label[drv->raid_level]);
356 return 0;
357}
358
359static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
360{
361 ctlr_info_t *h = seq->private;
362
363 if (*pos > h->highest_lun)
364 return NULL;
365 *pos += 1;
366
367 return pos;
368}
369
370static void cciss_seq_stop(struct seq_file *seq, void *v)
371{
372 ctlr_info_t *h = seq->private;
373
374 /* Only reset h->busy_configuring if we succeeded in setting
375 * it during cciss_seq_start. */
376 if (v == ERR_PTR(-EBUSY))
377 return;
7c832835 378
1da177e4 379 h->busy_configuring = 0;
1da177e4
LT		 380}
381
88e9d34c 382static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 383 .start = cciss_seq_start,
384 .show = cciss_seq_show,
385 .next = cciss_seq_next,
386 .stop = cciss_seq_stop,
387};
388
389static int cciss_seq_open(struct inode *inode, struct file *file)
390{
391 int ret = seq_open(file, &cciss_seq_ops);
392 struct seq_file *seq = file->private_data;
393
394 if (!ret)
395 seq->private = PDE(inode)->data;
396
397 return ret;
398}
399
400static ssize_t
401cciss_proc_write(struct file *file, const char __user *buf,
402 size_t length, loff_t *ppos)
1da177e4 403{
89b6e743
MM		 404 int err;
405 char *buffer;
406
407#ifndef CONFIG_CISS_SCSI_TAPE
408 return -EINVAL;
1da177e4
LT		 409#endif
410
89b6e743 411 if (!buf || length > PAGE_SIZE - 1)
7c832835 412 return -EINVAL;
89b6e743
MM		 413
414 buffer = (char *)__get_free_page(GFP_KERNEL);
415 if (!buffer)
416 return -ENOMEM;
417
418 err = -EFAULT;
419 if (copy_from_user(buffer, buf, length))
420 goto out;
421 buffer[length] = '\0';
422
423#ifdef CONFIG_CISS_SCSI_TAPE
424 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
425 struct seq_file *seq = file->private_data;
426 ctlr_info_t *h = seq->private;
427 int rc;
428
7c832835
BH		 429 rc = cciss_engage_scsi(h->ctlr);
430 if (rc != 0)
89b6e743
MM		 431 err = -rc;
432 else
433 err = length;
434 } else
435#endif /* CONFIG_CISS_SCSI_TAPE */
436 err = -EINVAL;
7c832835
BH		 437 /* might be nice to have "disengage" too, but it's not
438 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 439
440out:
441 free_page((unsigned long)buffer);
442 return err;
1da177e4
LT		 443}
444
828c0950 445static const struct file_operations cciss_proc_fops = {
89b6e743
MM		 446 .owner = THIS_MODULE,
447 .open = cciss_seq_open,
448 .read = seq_read,
449 .llseek = seq_lseek,
450 .release = seq_release,
451 .write = cciss_proc_write,
452};
453
1da177e4
LT		 454static void __devinit cciss_procinit(int i)
455{
456 struct proc_dir_entry *pde;
457
89b6e743 458 if (proc_cciss == NULL)
928b4d8c 459 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 460 if (!proc_cciss)
461 return;
3dfcf9c4 462 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 463 S_IROTH, proc_cciss,
3dfcf9c4 464 &cciss_proc_fops, hba[i]);
1da177e4 465}
7c832835 466#endif /* CONFIG_PROC_FS */
1da177e4 467
7fe06326
AP		 468#define MAX_PRODUCT_NAME_LEN 19
469
470#define to_hba(n) container_of(n, struct ctlr_info, dev)
471#define to_drv(n) container_of(n, drive_info_struct, dev)
472
d6f4965d
AP		 473static ssize_t host_store_rescan(struct device *dev,
474 struct device_attribute *attr,
475 const char *buf, size_t count)
476{
477 struct ctlr_info *h = to_hba(dev);
478
479 add_to_scan_list(h);
480 wake_up_process(cciss_scan_thread);
481 wait_for_completion_interruptible(&h->scan_wait);
482
483 return count;
484}
8ba95c69 485static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 486
487static ssize_t dev_show_unique_id(struct device *dev,
488 struct device_attribute *attr,
489 char *buf)
490{
491 drive_info_struct *drv = to_drv(dev);
492 struct ctlr_info *h = to_hba(drv->dev.parent);
493 __u8 sn[16];
494 unsigned long flags;
495 int ret = 0;
496
497 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
498 if (h->busy_configuring)
499 ret = -EBUSY;
500 else
501 memcpy(sn, drv->serial_no, sizeof(sn));
502 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
503
504 if (ret)
505 return ret;
506 else
507 return snprintf(buf, 16 * 2 + 2,
508 "%02X%02X%02X%02X%02X%02X%02X%02X"
509 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
510 sn[0], sn[1], sn[2], sn[3],
511 sn[4], sn[5], sn[6], sn[7],
512 sn[8], sn[9], sn[10], sn[11],
513 sn[12], sn[13], sn[14], sn[15]);
514}
8ba95c69 515static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
7fe06326
AP		 516
517static ssize_t dev_show_vendor(struct device *dev,
518 struct device_attribute *attr,
519 char *buf)
520{
521 drive_info_struct *drv = to_drv(dev);
522 struct ctlr_info *h = to_hba(drv->dev.parent);
523 char vendor[VENDOR_LEN + 1];
524 unsigned long flags;
525 int ret = 0;
526
527 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
528 if (h->busy_configuring)
529 ret = -EBUSY;
530 else
531 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
532 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
533
534 if (ret)
535 return ret;
536 else
537 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
538}
8ba95c69 539static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
7fe06326
AP		 540
541static ssize_t dev_show_model(struct device *dev,
542 struct device_attribute *attr,
543 char *buf)
544{
545 drive_info_struct *drv = to_drv(dev);
546 struct ctlr_info *h = to_hba(drv->dev.parent);
547 char model[MODEL_LEN + 1];
548 unsigned long flags;
549 int ret = 0;
550
551 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
552 if (h->busy_configuring)
553 ret = -EBUSY;
554 else
555 memcpy(model, drv->model, MODEL_LEN + 1);
556 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
557
558 if (ret)
559 return ret;
560 else
561 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
562}
8ba95c69 563static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
7fe06326
AP		 564
565static ssize_t dev_show_rev(struct device *dev,
566 struct device_attribute *attr,
567 char *buf)
568{
569 drive_info_struct *drv = to_drv(dev);
570 struct ctlr_info *h = to_hba(drv->dev.parent);
571 char rev[REV_LEN + 1];
572 unsigned long flags;
573 int ret = 0;
574
575 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
576 if (h->busy_configuring)
577 ret = -EBUSY;
578 else
579 memcpy(rev, drv->rev, REV_LEN + 1);
580 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
581
582 if (ret)
583 return ret;
584 else
585 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
586}
8ba95c69 587static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
7fe06326 588
ce84a8ae
SC		 589static ssize_t cciss_show_lunid(struct device *dev,
590 struct device_attribute *attr, char *buf)
591{
9cef0d2f
SC		 592 drive_info_struct *drv = to_drv(dev);
593 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC		 594 unsigned long flags;
595 unsigned char lunid[8];
596
597 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
598 if (h->busy_configuring) {
599 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
600 return -EBUSY;
601 }
602 if (!drv->heads) {
603 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
604 return -ENOTTY;
605 }
606 memcpy(lunid, drv->LunID, sizeof(lunid));
607 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
608 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
609 lunid[0], lunid[1], lunid[2], lunid[3],
610 lunid[4], lunid[5], lunid[6], lunid[7]);
611}
8ba95c69 612static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
ce84a8ae 613
3ff1111d
SC		 614static ssize_t cciss_show_raid_level(struct device *dev,
615 struct device_attribute *attr, char *buf)
616{
9cef0d2f
SC		 617 drive_info_struct *drv = to_drv(dev);
618 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC		 619 int raid;
620 unsigned long flags;
621
622 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
623 if (h->busy_configuring) {
624 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
625 return -EBUSY;
626 }
627 raid = drv->raid_level;
628 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
629 if (raid < 0 || raid > RAID_UNKNOWN)
630 raid = RAID_UNKNOWN;
631
632 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
633 raid_label[raid]);
634}
8ba95c69 635static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
3ff1111d 636
e272afec
SC		 637static ssize_t cciss_show_usage_count(struct device *dev,
638 struct device_attribute *attr, char *buf)
639{
9cef0d2f
SC		 640 drive_info_struct *drv = to_drv(dev);
641 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC		 642 unsigned long flags;
643 int count;
644
645 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
646 if (h->busy_configuring) {
647 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
648 return -EBUSY;
649 }
650 count = drv->usage_count;
651 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
652 return snprintf(buf, 20, "%d\n", count);
653}
8ba95c69 654static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
e272afec 655
d6f4965d
AP		 656static struct attribute *cciss_host_attrs[] = {
657 &dev_attr_rescan.attr,
658 NULL
659};
660
661static struct attribute_group cciss_host_attr_group = {
662 .attrs = cciss_host_attrs,
663};
664
9f792d9f 665static const struct attribute_group *cciss_host_attr_groups[] = {
d6f4965d
AP		 666 &cciss_host_attr_group,
667 NULL
668};
669
670static struct device_type cciss_host_type = {
671 .name = "cciss_host",
672 .groups = cciss_host_attr_groups,
617e1344 673 .release = cciss_hba_release,
d6f4965d
AP		 674};
675
7fe06326
AP		 676static struct attribute *cciss_dev_attrs[] = {
677 &dev_attr_unique_id.attr,
678 &dev_attr_model.attr,
679 &dev_attr_vendor.attr,
680 &dev_attr_rev.attr,
ce84a8ae 681 &dev_attr_lunid.attr,
3ff1111d 682 &dev_attr_raid_level.attr,
e272afec 683 &dev_attr_usage_count.attr,
7fe06326
AP		 684 NULL
685};
686
687static struct attribute_group cciss_dev_attr_group = {
688 .attrs = cciss_dev_attrs,
689};
690
a4dbd674 691static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 692 &cciss_dev_attr_group,
693 NULL
694};
695
696static struct device_type cciss_dev_type = {
697 .name = "cciss_device",
698 .groups = cciss_dev_attr_groups,
617e1344 699 .release = cciss_device_release,
7fe06326
AP		 700};
701
702static struct bus_type cciss_bus_type = {
703 .name = "cciss",
704};
705
617e1344
SC		 706/*
707 * cciss_hba_release is called when the reference count
708 * of h->dev goes to zero.
709 */
710static void cciss_hba_release(struct device *dev)
711{
712 /*
713 * nothing to do, but need this to avoid a warning
714 * about not having a release handler from lib/kref.c.
715 */
716}
7fe06326
AP		 717
718/*
719 * Initialize sysfs entry for each controller. This sets up and registers
720 * the 'cciss#' directory for each individual controller under
721 * /sys/bus/pci/devices/<dev>/.
722 */
723static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
724{
725 device_initialize(&h->dev);
726 h->dev.type = &cciss_host_type;
727 h->dev.bus = &cciss_bus_type;
728 dev_set_name(&h->dev, "%s", h->devname);
729 h->dev.parent = &h->pdev->dev;
730
731 return device_add(&h->dev);
732}
733
734/*
735 * Remove sysfs entries for an hba.
736 */
737static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
738{
739 device_del(&h->dev);
617e1344
SC		 740 put_device(&h->dev); /* final put. */
741}
742
743/* cciss_device_release is called when the reference count
9cef0d2f 744 * of h->drv[x]dev goes to zero.
617e1344
SC		 745 */
746static void cciss_device_release(struct device *dev)
747{
9cef0d2f
SC		 748 drive_info_struct *drv = to_drv(dev);
749 kfree(drv);
7fe06326
AP		 750}
751
752/*
753 * Initialize sysfs for each logical drive. This sets up and registers
754 * the 'c#d#' directory for each individual logical drive under
755 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
756 * /sys/block/cciss!c#d# to this entry.
757 */
617e1344 758static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 759 int drv_index)
760{
617e1344
SC		 761 struct device *dev;
762
9cef0d2f 763 if (h->drv[drv_index]->device_initialized)
8ce51966
SC		 764 return 0;
765
9cef0d2f 766 dev = &h->drv[drv_index]->dev;
617e1344
SC		 767 device_initialize(dev);
768 dev->type = &cciss_dev_type;
769 dev->bus = &cciss_bus_type;
770 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
771 dev->parent = &h->dev;
9cef0d2f 772 h->drv[drv_index]->device_initialized = 1;
617e1344 773 return device_add(dev);
7fe06326
AP		 774}
775
776/*
777 * Remove sysfs entries for a logical drive.
778 */
8ce51966
SC		 779static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
780 int ctlr_exiting)
7fe06326 781{
9cef0d2f 782 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC		 783
784 /* special case for c*d0, we only destroy it on controller exit */
785 if (drv_index == 0 && !ctlr_exiting)
786 return;
787
617e1344
SC		 788 device_del(dev);
789 put_device(dev); /* the "final" put. */
9cef0d2f 790 h->drv[drv_index] = NULL;
7fe06326
AP		 791}
792
7c832835
BH		 793/*
794 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 795 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 796 * which ones are free or in use. For operations that can wait for kmalloc
797 * to possible sleep, this routine can be called with get_from_pool set to 0.
798 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
799 */
800static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 801{
802 CommandList_struct *c;
7c832835 803 int i;
1da177e4
LT		 804 u64bit temp64;
805 dma_addr_t cmd_dma_handle, err_dma_handle;
806
7c832835
BH		 807 if (!get_from_pool) {
808 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
809 sizeof(CommandList_struct), &cmd_dma_handle);
810 if (c == NULL)
811 return NULL;
1da177e4
LT		 812 memset(c, 0, sizeof(CommandList_struct));
813
33079b21
MM		 814 c->cmdindex = -1;
815
7c832835
BH		 816 c->err_info = (ErrorInfo_struct *)
817 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
818 &err_dma_handle);
819
820 if (c->err_info == NULL) {
821 pci_free_consistent(h->pdev,
1da177e4
LT		 822 sizeof(CommandList_struct), c, cmd_dma_handle);
823 return NULL;
824 }
825 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 826 } else { /* get it out of the controllers pool */
827
828 do {
f880632f
MM		 829 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
830 if (i == h->nr_cmds)
7c832835
BH		 831 return NULL;
832 } while (test_and_set_bit
833 (i & (BITS_PER_LONG - 1),
834 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 835#ifdef CCISS_DEBUG
836 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
837#endif
7c832835 838 c = h->cmd_pool + i;
1da177e4 839 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 840 cmd_dma_handle = h->cmd_pool_dhandle
841 + i * sizeof(CommandList_struct);
1da177e4
LT		 842 c->err_info = h->errinfo_pool + i;
843 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 844 err_dma_handle = h->errinfo_pool_dhandle
845 + i * sizeof(ErrorInfo_struct);
846 h->nr_allocs++;
33079b21
MM		 847
848 c->cmdindex = i;
7c832835 849 }
1da177e4 850
8a3173de 851 INIT_HLIST_NODE(&c->list);
1da177e4 852 c->busaddr = (__u32) cmd_dma_handle;
7c832835 853 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 854 c->ErrDesc.Addr.lower = temp64.val32.lower;
855 c->ErrDesc.Addr.upper = temp64.val32.upper;
856 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 857
7c832835
BH		 858 c->ctlr = h->ctlr;
859 return c;
1da177e4
LT		 860}
861
7c832835
BH		 862/*
863 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 864 */
865static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
866{
867 int i;
868 u64bit temp64;
869
7c832835 870 if (!got_from_pool) {
1da177e4
LT		 871 temp64.val32.lower = c->ErrDesc.Addr.lower;
872 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 873 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
874 c->err_info, (dma_addr_t) temp64.val);
875 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
876 c, (dma_addr_t) c->busaddr);
877 } else {
1da177e4 878 i = c - h->cmd_pool;
7c832835
BH		 879 clear_bit(i & (BITS_PER_LONG - 1),
880 h->cmd_pool_bits + (i / BITS_PER_LONG));
881 h->nr_frees++;
882 }
1da177e4
LT		 883}
884
885static inline ctlr_info_t *get_host(struct gendisk *disk)
886{
7c832835 887 return disk->queue->queuedata;
1da177e4
LT		 888}
889
890static inline drive_info_struct *get_drv(struct gendisk *disk)
891{
892 return disk->private_data;
893}
894
895/*
896 * Open. Make sure the device is really there.
897 */
ef7822c2 898static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 899{
ef7822c2
AV		 900 ctlr_info_t *host = get_host(bdev->bd_disk);
901 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 902
903#ifdef CCISS_DEBUG
ef7822c2 904 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 905#endif /* CCISS_DEBUG */
1da177e4 906
2e043986 907 if (drv->busy_configuring)
ddd47442 908 return -EBUSY;
1da177e4
LT		 909 /*
910 * Root is allowed to open raw volume zero even if it's not configured
911 * so array config can still work. Root is also allowed to open any
912 * volume that has a LUN ID, so it can issue IOCTL to reread the
913 * disk information. I don't think I really like this
914 * but I'm already using way to many device nodes to claim another one
915 * for "raw controller".
916 */
7a06f789 917 if (drv->heads == 0) {
ef7822c2 918 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 919 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 920 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 921 return -ENXIO;
1da177e4 922 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 923 } else if (memcmp(drv->LunID, CTLR_LUNID,
924 sizeof(drv->LunID))) {
1da177e4
LT		 925 return -ENXIO;
926 }
927 }
928 if (!capable(CAP_SYS_ADMIN))
929 return -EPERM;
930 }
931 drv->usage_count++;
932 host->usage_count++;
933 return 0;
934}
7c832835 935
1da177e4
LT		 936/*
937 * Close. Sync first.
938 */
ef7822c2 939static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 940{
ef7822c2
AV		 941 ctlr_info_t *host = get_host(disk);
942 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 943
944#ifdef CCISS_DEBUG
ef7822c2 945 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 946#endif /* CCISS_DEBUG */
1da177e4
LT		 947
948 drv->usage_count--;
949 host->usage_count--;
950 return 0;
951}
952
953#ifdef CONFIG_COMPAT
954
ef7822c2
AV		 955static int do_ioctl(struct block_device *bdev, fmode_t mode,
956 unsigned cmd, unsigned long arg)
1da177e4
LT		 957{
958 int ret;
959 lock_kernel();
ef7822c2 960 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 961 unlock_kernel();
962 return ret;
963}
964
ef7822c2
AV		 965static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
966 unsigned cmd, unsigned long arg);
967static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
968 unsigned cmd, unsigned long arg);
1da177e4 969
ef7822c2
AV		 970static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
971 unsigned cmd, unsigned long arg)
1da177e4
LT		 972{
973 switch (cmd) {
974 case CCISS_GETPCIINFO:
975 case CCISS_GETINTINFO:
976 case CCISS_SETINTINFO:
977 case CCISS_GETNODENAME:
978 case CCISS_SETNODENAME:
979 case CCISS_GETHEARTBEAT:
980 case CCISS_GETBUSTYPES:
981 case CCISS_GETFIRMVER:
982 case CCISS_GETDRIVVER:
983 case CCISS_REVALIDVOLS:
984 case CCISS_DEREGDISK:
985 case CCISS_REGNEWDISK:
986 case CCISS_REGNEWD:
987 case CCISS_RESCANDISK:
988 case CCISS_GETLUNINFO:
ef7822c2 989 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 990
991 case CCISS_PASSTHRU32:
ef7822c2 992 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 993 case CCISS_BIG_PASSTHRU32:
ef7822c2 994 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 995
996 default:
997 return -ENOIOCTLCMD;
998 }
999}
1000
ef7822c2
AV		 1001static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1002 unsigned cmd, unsigned long arg)
1da177e4
LT		 1003{
1004 IOCTL32_Command_struct __user *arg32 =
7c832835 1005 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1006 IOCTL_Command_struct arg64;
1007 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1008 int err;
1009 u32 cp;
1010
1011 err = 0;
7c832835
BH		 1012 err |=
1013 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1014 sizeof(arg64.LUN_info));
1015 err |=
1016 copy_from_user(&arg64.Request, &arg32->Request,
1017 sizeof(arg64.Request));
1018 err |=
1019 copy_from_user(&arg64.error_info, &arg32->error_info,
1020 sizeof(arg64.error_info));
1da177e4
LT		 1021 err |= get_user(arg64.buf_size, &arg32->buf_size);
1022 err |= get_user(cp, &arg32->buf);
1023 arg64.buf = compat_ptr(cp);
1024 err |= copy_to_user(p, &arg64, sizeof(arg64));
1025
1026 if (err)
1027 return -EFAULT;
1028
ef7822c2 1029 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1030 if (err)
1031 return err;
7c832835
BH		 1032 err |=
1033 copy_in_user(&arg32->error_info, &p->error_info,
1034 sizeof(arg32->error_info));
1da177e4
LT		 1035 if (err)
1036 return -EFAULT;
1037 return err;
1038}
1039
ef7822c2
AV		 1040static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1041 unsigned cmd, unsigned long arg)
1da177e4
LT		 1042{
1043 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1044 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1045 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1046 BIG_IOCTL_Command_struct __user *p =
1047 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1048 int err;
1049 u32 cp;
1050
1051 err = 0;
7c832835
BH		 1052 err |=
1053 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1054 sizeof(arg64.LUN_info));
1055 err |=
1056 copy_from_user(&arg64.Request, &arg32->Request,
1057 sizeof(arg64.Request));
1058 err |=
1059 copy_from_user(&arg64.error_info, &arg32->error_info,
1060 sizeof(arg64.error_info));
1da177e4
LT		 1061 err |= get_user(arg64.buf_size, &arg32->buf_size);
1062 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1063 err |= get_user(cp, &arg32->buf);
1064 arg64.buf = compat_ptr(cp);
1065 err |= copy_to_user(p, &arg64, sizeof(arg64));
1066
1067 if (err)
7c832835 1068 return -EFAULT;
1da177e4 1069
ef7822c2 1070 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1071 if (err)
1072 return err;
7c832835
BH		 1073 err |=
1074 copy_in_user(&arg32->error_info, &p->error_info,
1075 sizeof(arg32->error_info));
1da177e4
LT		 1076 if (err)
1077 return -EFAULT;
1078 return err;
1079}
1080#endif
a885c8c4
CH		 1081
1082static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1083{
1084 drive_info_struct *drv = get_drv(bdev->bd_disk);
1085
1086 if (!drv->cylinders)
1087 return -ENXIO;
1088
1089 geo->heads = drv->heads;
1090 geo->sectors = drv->sectors;
1091 geo->cylinders = drv->cylinders;
1092 return 0;
1093}
1094
0a9279cc
MM		 1095static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1096{
1097 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1098 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1099 (void)check_for_unit_attention(host, c);
1100}
1da177e4 1101/*
7c832835 1102 * ioctl
1da177e4 1103 */
ef7822c2 1104static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1105 unsigned int cmd, unsigned long arg)
1da177e4 1106{
1da177e4
LT		 1107 struct gendisk *disk = bdev->bd_disk;
1108 ctlr_info_t *host = get_host(disk);
1109 drive_info_struct *drv = get_drv(disk);
1110 int ctlr = host->ctlr;
1111 void __user *argp = (void __user *)arg;
1112
1113#ifdef CCISS_DEBUG
1114 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1115#endif /* CCISS_DEBUG */
1116
1117 switch (cmd) {
1da177e4 1118 case CCISS_GETPCIINFO:
7c832835
BH		 1119 {
1120 cciss_pci_info_struct pciinfo;
1121
1122 if (!arg)
1123 return -EINVAL;
1124 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1125 pciinfo.bus = host->pdev->bus->number;
1126 pciinfo.dev_fn = host->pdev->devfn;
1127 pciinfo.board_id = host->board_id;
1128 if (copy_to_user
1129 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1130 return -EFAULT;
1131 return 0;
1132 }
1da177e4 1133 case CCISS_GETINTINFO:
7c832835
BH		 1134 {
1135 cciss_coalint_struct intinfo;
1136 if (!arg)
1137 return -EINVAL;
1138 intinfo.delay =
1139 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1140 intinfo.count =
1141 readl(&host->cfgtable->HostWrite.CoalIntCount);
1142 if (copy_to_user
1143 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1144 return -EFAULT;
1145 return 0;
1146 }
1da177e4 1147 case CCISS_SETINTINFO:
1da177e4 1148 {
7c832835
BH		 1149 cciss_coalint_struct intinfo;
1150 unsigned long flags;
1151 int i;
1152
1153 if (!arg)
1154 return -EINVAL;
1155 if (!capable(CAP_SYS_ADMIN))
1156 return -EPERM;
1157 if (copy_from_user
1158 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1159 return -EFAULT;
1160 if ((intinfo.delay == 0) && (intinfo.count == 0))
1161 {
1162// printk("cciss_ioctl: delay and count cannot be 0\n");
1163 return -EINVAL;
1164 }
1165 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1166 /* Update the field, and then ring the doorbell */
1167 writel(intinfo.delay,
1168 &(host->cfgtable->HostWrite.CoalIntDelay));
1169 writel(intinfo.count,
1170 &(host->cfgtable->HostWrite.CoalIntCount));
1171 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1172
1173 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1174 if (!(readl(host->vaddr + SA5_DOORBELL)
1175 & CFGTBL_ChangeReq))
1176 break;
1177 /* delay and try again */
1178 udelay(1000);
1179 }
1180 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1181 if (i >= MAX_IOCTL_CONFIG_WAIT)
1182 return -EAGAIN;
1183 return 0;
1da177e4 1184 }
1da177e4 1185 case CCISS_GETNODENAME:
7c832835
BH		 1186 {
1187 NodeName_type NodeName;
1188 int i;
1189
1190 if (!arg)
1191 return -EINVAL;
1192 for (i = 0; i < 16; i++)
1193 NodeName[i] =
1194 readb(&host->cfgtable->ServerName[i]);
1195 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1196 return -EFAULT;
1197 return 0;
1198 }
1da177e4 1199 case CCISS_SETNODENAME:
7c832835
BH		 1200 {
1201 NodeName_type NodeName;
1202 unsigned long flags;
1203 int i;
1204
1205 if (!arg)
1206 return -EINVAL;
1207 if (!capable(CAP_SYS_ADMIN))
1208 return -EPERM;
1209
1210 if (copy_from_user
1211 (NodeName, argp, sizeof(NodeName_type)))
1212 return -EFAULT;
1213
1214 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1215
1216 /* Update the field, and then ring the doorbell */
1217 for (i = 0; i < 16; i++)
1218 writeb(NodeName[i],
1219 &host->cfgtable->ServerName[i]);
1220
1221 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1222
1223 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1224 if (!(readl(host->vaddr + SA5_DOORBELL)
1225 & CFGTBL_ChangeReq))
1226 break;
1227 /* delay and try again */
1228 udelay(1000);
1229 }
1230 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1231 if (i >= MAX_IOCTL_CONFIG_WAIT)
1232 return -EAGAIN;
1233 return 0;
1234 }
1da177e4
LT		 1235
1236 case CCISS_GETHEARTBEAT:
7c832835
BH		 1237 {
1238 Heartbeat_type heartbeat;
1239
1240 if (!arg)
1241 return -EINVAL;
1242 heartbeat = readl(&host->cfgtable->HeartBeat);
1243 if (copy_to_user
1244 (argp, &heartbeat, sizeof(Heartbeat_type)))
1245 return -EFAULT;
1246 return 0;
1247 }
1da177e4 1248 case CCISS_GETBUSTYPES:
7c832835
BH		 1249 {
1250 BusTypes_type BusTypes;
1251
1252 if (!arg)
1253 return -EINVAL;
1254 BusTypes = readl(&host->cfgtable->BusTypes);
1255 if (copy_to_user
1256 (argp, &BusTypes, sizeof(BusTypes_type)))
1257 return -EFAULT;
1258 return 0;
1259 }
1da177e4 1260 case CCISS_GETFIRMVER:
7c832835
BH		 1261 {
1262 FirmwareVer_type firmware;
1da177e4 1263
7c832835
BH		 1264 if (!arg)
1265 return -EINVAL;
1266 memcpy(firmware, host->firm_ver, 4);
1da177e4 1267
7c832835
BH		 1268 if (copy_to_user
1269 (argp, firmware, sizeof(FirmwareVer_type)))
1270 return -EFAULT;
1271 return 0;
1272 }
1273 case CCISS_GETDRIVVER:
1274 {
1275 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1276
7c832835
BH		 1277 if (!arg)
1278 return -EINVAL;
1da177e4 1279
7c832835
BH		 1280 if (copy_to_user
1281 (argp, &DriverVer, sizeof(DriverVer_type)))
1282 return -EFAULT;
1283 return 0;
1284 }
1da177e4 1285
6ae5ce8e
MM		 1286 case CCISS_DEREGDISK:
1287 case CCISS_REGNEWD:
1da177e4 1288 case CCISS_REVALIDVOLS:
2d11d993 1289 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1290
1291 case CCISS_GETLUNINFO:{
1292 LogvolInfo_struct luninfo;
1293
39ccf9a6
SC		 1294 memcpy(&luninfo.LunID, drv->LunID,
1295 sizeof(luninfo.LunID));
7c832835
BH		 1296 luninfo.num_opens = drv->usage_count;
1297 luninfo.num_parts = 0;
1298 if (copy_to_user(argp, &luninfo,
1299 sizeof(LogvolInfo_struct)))
1300 return -EFAULT;
1301 return 0;
1302 }
1da177e4 1303 case CCISS_PASSTHRU:
1da177e4 1304 {
7c832835
BH		 1305 IOCTL_Command_struct iocommand;
1306 CommandList_struct *c;
1307 char *buff = NULL;
1308 u64bit temp64;
1309 unsigned long flags;
6e9a4738 1310 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1311
7c832835
BH		 1312 if (!arg)
1313 return -EINVAL;
1da177e4 1314
7c832835
BH		 1315 if (!capable(CAP_SYS_RAWIO))
1316 return -EPERM;
1da177e4 1317
7c832835
BH		 1318 if (copy_from_user
1319 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1320 return -EFAULT;
1321 if ((iocommand.buf_size < 1) &&
1322 (iocommand.Request.Type.Direction != XFER_NONE)) {
1323 return -EINVAL;
1324 }
1325#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1326 /* Check kmalloc limits */
1327 if (iocommand.buf_size > 128000)
1328 return -EINVAL;
1329#endif
1330 if (iocommand.buf_size > 0) {
1331 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1332 if (buff == NULL)
1333 return -EFAULT;
1334 }
1335 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1336 /* Copy the data into the buffer we created */
1337 if (copy_from_user
1338 (buff, iocommand.buf, iocommand.buf_size)) {
1339 kfree(buff);
1340 return -EFAULT;
1341 }
1342 } else {
1343 memset(buff, 0, iocommand.buf_size);
1344 }
1345 if ((c = cmd_alloc(host, 0)) == NULL) {
1346 kfree(buff);
1347 return -ENOMEM;
1348 }
1349 // Fill in the command type
1350 c->cmd_type = CMD_IOCTL_PEND;
1351 // Fill in Command Header
1352 c->Header.ReplyQueue = 0; // unused in simple mode
1353 if (iocommand.buf_size > 0) // buffer to fill
1354 {
1355 c->Header.SGList = 1;
1356 c->Header.SGTotal = 1;
1357 } else // no buffers to fill
1358 {
1359 c->Header.SGList = 0;
1360 c->Header.SGTotal = 0;
1361 }
1362 c->Header.LUN = iocommand.LUN_info;
1363 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1364
7c832835
BH		 1365 // Fill in Request block
1366 c->Request = iocommand.Request;
1da177e4 1367
7c832835
BH		 1368 // Fill in the scatter gather information
1369 if (iocommand.buf_size > 0) {
1370 temp64.val = pci_map_single(host->pdev, buff,
1371 iocommand.buf_size,
1372 PCI_DMA_BIDIRECTIONAL);
1373 c->SG[0].Addr.lower = temp64.val32.lower;
1374 c->SG[0].Addr.upper = temp64.val32.upper;
1375 c->SG[0].Len = iocommand.buf_size;
1376 c->SG[0].Ext = 0; // we are not chaining
1377 }
1378 c->waiting = &wait;
1379
1380 /* Put the request on the tail of the request queue */
1381 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1382 addQ(&host->reqQ, c);
1383 host->Qdepth++;
1384 start_io(host);
1385 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1386
1387 wait_for_completion(&wait);
1388
1389 /* unlock the buffers from DMA */
1390 temp64.val32.lower = c->SG[0].Addr.lower;
1391 temp64.val32.upper = c->SG[0].Addr.upper;
1392 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1393 iocommand.buf_size,
1394 PCI_DMA_BIDIRECTIONAL);
1395
0a9279cc
MM		 1396 check_ioctl_unit_attention(host, c);
1397
7c832835
BH		 1398 /* Copy the error information out */
1399 iocommand.error_info = *(c->err_info);
1400 if (copy_to_user
1401 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1402 kfree(buff);
1da177e4
LT		 1403 cmd_free(host, c, 0);
1404 return -EFAULT;
1405 }
7c832835
BH		 1406
1407 if (iocommand.Request.Type.Direction == XFER_READ) {
1408 /* Copy the data out of the buffer we created */
1409 if (copy_to_user
1410 (iocommand.buf, buff, iocommand.buf_size)) {
1411 kfree(buff);
1412 cmd_free(host, c, 0);
1413 return -EFAULT;
1414 }
1415 }
1416 kfree(buff);
1417 cmd_free(host, c, 0);
1418 return 0;
1da177e4 1419 }
7c832835
BH		 1420 case CCISS_BIG_PASSTHRU:{
1421 BIG_IOCTL_Command_struct *ioc;
1422 CommandList_struct *c;
1423 unsigned char **buff = NULL;
1424 int *buff_size = NULL;
1425 u64bit temp64;
1426 unsigned long flags;
1427 BYTE sg_used = 0;
1428 int status = 0;
1429 int i;
6e9a4738 1430 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1431 __u32 left;
1432 __u32 sz;
1433 BYTE __user *data_ptr;
1434
1435 if (!arg)
1436 return -EINVAL;
1437 if (!capable(CAP_SYS_RAWIO))
1438 return -EPERM;
1439 ioc = (BIG_IOCTL_Command_struct *)
1440 kmalloc(sizeof(*ioc), GFP_KERNEL);
1441 if (!ioc) {
1442 status = -ENOMEM;
1443 goto cleanup1;
1444 }
1445 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1446 status = -EFAULT;
1447 goto cleanup1;
1448 }
1449 if ((ioc->buf_size < 1) &&
1450 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1451 status = -EINVAL;
1452 goto cleanup1;
7c832835
BH		 1453 }
1454 /* Check kmalloc limits using all SGs */
1455 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1456 status = -EINVAL;
1457 goto cleanup1;
1458 }
1459 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1460 status = -EINVAL;
1461 goto cleanup1;
1462 }
1463 buff =
1464 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1465 if (!buff) {
1da177e4
LT		 1466 status = -ENOMEM;
1467 goto cleanup1;
1468 }
5cbded58 1469 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1470 GFP_KERNEL);
1471 if (!buff_size) {
1472 status = -ENOMEM;
1473 goto cleanup1;
1474 }
1475 left = ioc->buf_size;
1476 data_ptr = ioc->buf;
1477 while (left) {
1478 sz = (left >
1479 ioc->malloc_size) ? ioc->
1480 malloc_size : left;
1481 buff_size[sg_used] = sz;
1482 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1483 if (buff[sg_used] == NULL) {
1da177e4 1484 status = -ENOMEM;
15534d38
JA		 1485 goto cleanup1;
1486 }
7c832835
BH		 1487 if (ioc->Request.Type.Direction == XFER_WRITE) {
1488 if (copy_from_user
1489 (buff[sg_used], data_ptr, sz)) {
f7108f91 1490 status = -EFAULT;
7c832835
BH		 1491 goto cleanup1;
1492 }
1493 } else {
1494 memset(buff[sg_used], 0, sz);
1495 }
1496 left -= sz;
1497 data_ptr += sz;
1498 sg_used++;
1499 }
1500 if ((c = cmd_alloc(host, 0)) == NULL) {
1501 status = -ENOMEM;
1502 goto cleanup1;
1503 }
1504 c->cmd_type = CMD_IOCTL_PEND;
1505 c->Header.ReplyQueue = 0;
1506
1507 if (ioc->buf_size > 0) {
1508 c->Header.SGList = sg_used;
1509 c->Header.SGTotal = sg_used;
1da177e4 1510 } else {
7c832835
BH		 1511 c->Header.SGList = 0;
1512 c->Header.SGTotal = 0;
1da177e4 1513 }
7c832835
BH		 1514 c->Header.LUN = ioc->LUN_info;
1515 c->Header.Tag.lower = c->busaddr;
1516
1517 c->Request = ioc->Request;
1518 if (ioc->buf_size > 0) {
1519 int i;
1520 for (i = 0; i < sg_used; i++) {
1521 temp64.val =
1522 pci_map_single(host->pdev, buff[i],
1523 buff_size[i],
1524 PCI_DMA_BIDIRECTIONAL);
1525 c->SG[i].Addr.lower =
1526 temp64.val32.lower;
1527 c->SG[i].Addr.upper =
1528 temp64.val32.upper;
1529 c->SG[i].Len = buff_size[i];
1530 c->SG[i].Ext = 0; /* we are not chaining */
1531 }
1532 }
1533 c->waiting = &wait;
1534 /* Put the request on the tail of the request queue */
1535 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1536 addQ(&host->reqQ, c);
1537 host->Qdepth++;
1538 start_io(host);
1539 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1540 wait_for_completion(&wait);
1541 /* unlock the buffers from DMA */
1542 for (i = 0; i < sg_used; i++) {
1543 temp64.val32.lower = c->SG[i].Addr.lower;
1544 temp64.val32.upper = c->SG[i].Addr.upper;
1545 pci_unmap_single(host->pdev,
1546 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1547 PCI_DMA_BIDIRECTIONAL);
1da177e4 1548 }
0a9279cc 1549 check_ioctl_unit_attention(host, c);
7c832835
BH		 1550 /* Copy the error information out */
1551 ioc->error_info = *(c->err_info);
1552 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1553 cmd_free(host, c, 0);
1554 status = -EFAULT;
1555 goto cleanup1;
1556 }
1557 if (ioc->Request.Type.Direction == XFER_READ) {
1558 /* Copy the data out of the buffer we created */
1559 BYTE __user *ptr = ioc->buf;
1560 for (i = 0; i < sg_used; i++) {
1561 if (copy_to_user
1562 (ptr, buff[i], buff_size[i])) {
1563 cmd_free(host, c, 0);
1564 status = -EFAULT;
1565 goto cleanup1;
1566 }
1567 ptr += buff_size[i];
1da177e4 1568 }
1da177e4 1569 }
7c832835
BH		 1570 cmd_free(host, c, 0);
1571 status = 0;
1572 cleanup1:
1573 if (buff) {
1574 for (i = 0; i < sg_used; i++)
1575 kfree(buff[i]);
1576 kfree(buff);
1577 }
1578 kfree(buff_size);
1579 kfree(ioc);
1580 return status;
1da177e4 1581 }
03bbfee5
MMOD		 1582
1583 /* scsi_cmd_ioctl handles these, below, though some are not */
1584 /* very meaningful for cciss. SG_IO is the main one people want. */
1585
1586 case SG_GET_VERSION_NUM:
1587 case SG_SET_TIMEOUT:
1588 case SG_GET_TIMEOUT:
1589 case SG_GET_RESERVED_SIZE:
1590 case SG_SET_RESERVED_SIZE:
1591 case SG_EMULATED_HOST:
1592 case SG_IO:
1593 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1594 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1595
1596 /* scsi_cmd_ioctl would normally handle these, below, but */
1597 /* they aren't a good fit for cciss, as CD-ROMs are */
1598 /* not supported, and we don't have any bus/target/lun */
1599 /* which we present to the kernel. */
1600
1601 case CDROM_SEND_PACKET:
1602 case CDROMCLOSETRAY:
1603 case CDROMEJECT:
1604 case SCSI_IOCTL_GET_IDLUN:
1605 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1606 default:
1607 return -ENOTTY;
1608 }
1da177e4
LT		 1609}
1610
7b30f092
JA		 1611static void cciss_check_queues(ctlr_info_t *h)
1612{
1613 int start_queue = h->next_to_run;
1614 int i;
1615
1616 /* check to see if we have maxed out the number of commands that can
1617 * be placed on the queue. If so then exit. We do this check here
1618 * in case the interrupt we serviced was from an ioctl and did not
1619 * free any new commands.
1620 */
f880632f 1621 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1622 return;
1623
1624 /* We have room on the queue for more commands. Now we need to queue
1625 * them up. We will also keep track of the next queue to run so
1626 * that every queue gets a chance to be started first.
1627 */
1628 for (i = 0; i < h->highest_lun + 1; i++) {
1629 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1630 /* make sure the disk has been added and the drive is real
1631 * because this can be called from the middle of init_one.
1632 */
9cef0d2f
SC		 1633 if (!h->drv[curr_queue])
1634 continue;
1635 if (!(h->drv[curr_queue]->queue) ||
1636 !(h->drv[curr_queue]->heads))
7b30f092
JA		 1637 continue;
1638 blk_start_queue(h->gendisk[curr_queue]->queue);
1639
1640 /* check to see if we have maxed out the number of commands
1641 * that can be placed on the queue.
1642 */
f880632f 1643 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1644 if (curr_queue == start_queue) {
1645 h->next_to_run =
1646 (start_queue + 1) % (h->highest_lun + 1);
1647 break;
1648 } else {
1649 h->next_to_run = curr_queue;
1650 break;
1651 }
7b30f092
JA		 1652 }
1653 }
1654}
1655
ca1e0484
MM		 1656static void cciss_softirq_done(struct request *rq)
1657{
1658 CommandList_struct *cmd = rq->completion_data;
1659 ctlr_info_t *h = hba[cmd->ctlr];
1660 unsigned long flags;
1661 u64bit temp64;
1662 int i, ddir;
1663
1664 if (cmd->Request.Type.Direction == XFER_READ)
1665 ddir = PCI_DMA_FROMDEVICE;
1666 else
1667 ddir = PCI_DMA_TODEVICE;
1668
1669 /* command did not need to be retried */
1670 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1671 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1672 temp64.val32.lower = cmd->SG[i].Addr.lower;
1673 temp64.val32.upper = cmd->SG[i].Addr.upper;
1674 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1675 }
1676
ca1e0484
MM		 1677#ifdef CCISS_DEBUG
1678 printk("Done with %p\n", rq);
7c832835 1679#endif /* CCISS_DEBUG */
ca1e0484 1680
c3a4d78c 1681 /* set the residual count for pc requests */
ac44e5b2 1682 if (blk_pc_request(rq))
c3a4d78c 1683 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1684
c3a4d78c 1685 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1686
ca1e0484 1687 spin_lock_irqsave(&h->lock, flags);
7c832835 1688 cmd_free(h, cmd, 1);
7b30f092 1689 cciss_check_queues(h);
ca1e0484
MM		 1690 spin_unlock_irqrestore(&h->lock, flags);
1691}
1692
39ccf9a6
SC		 1693static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1694 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1695{
9cef0d2f
SC		 1696 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1697 sizeof(h->drv[log_unit]->LunID));
b57695fe 1698}
1699
7fe06326
AP		 1700/* This function gets the SCSI vendor, model, and revision of a logical drive
1701 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1702 * they cannot be read.
1703 */
7b838bde 1704static void cciss_get_device_descr(int ctlr, int logvol,
7fe06326
AP		 1705 char *vendor, char *model, char *rev)
1706{
1707 int rc;
1708 InquiryData_struct *inq_buf;
b57695fe 1709 unsigned char scsi3addr[8];
7fe06326
AP		 1710
1711 *vendor = '\0';
1712 *model = '\0';
1713 *rev = '\0';
1714
1715 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1716 if (!inq_buf)
1717 return;
1718
b57695fe 1719 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1720 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1721 scsi3addr, TYPE_CMD);
7fe06326
AP		 1722 if (rc == IO_OK) {
1723 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1724 vendor[VENDOR_LEN] = '\0';
1725 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1726 model[MODEL_LEN] = '\0';
1727 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1728 rev[REV_LEN] = '\0';
1729 }
1730
1731 kfree(inq_buf);
1732 return;
1733}
1734
a72da29b
MM		 1735/* This function gets the serial number of a logical drive via
1736 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1737 * number cannot be had, for whatever reason, 16 bytes of 0xff
1738 * are returned instead.
1739 */
7b838bde 1740static void cciss_get_serial_no(int ctlr, int logvol,
a72da29b
MM		 1741 unsigned char *serial_no, int buflen)
1742{
1743#define PAGE_83_INQ_BYTES 64
1744 int rc;
1745 unsigned char *buf;
b57695fe 1746 unsigned char scsi3addr[8];
a72da29b
MM		 1747
1748 if (buflen > 16)
1749 buflen = 16;
1750 memset(serial_no, 0xff, buflen);
1751 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1752 if (!buf)
1753 return;
1754 memset(serial_no, 0, buflen);
b57695fe 1755 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 1756 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1757 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1758 if (rc == IO_OK)
1759 memcpy(serial_no, &buf[8], buflen);
1760 kfree(buf);
1761 return;
1762}
1763
617e1344
SC		 1764/*
1765 * cciss_add_disk sets up the block device queue for a logical drive
1766 */
1767static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1768 int drv_index)
1769{
1770 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1771 if (!disk->queue)
1772 goto init_queue_failure;
6ae5ce8e
MM		 1773 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1774 disk->major = h->major;
1775 disk->first_minor = drv_index << NWD_SHIFT;
1776 disk->fops = &cciss_fops;
9cef0d2f
SC		 1777 if (cciss_create_ld_sysfs_entry(h, drv_index))
1778 goto cleanup_queue;
1779 disk->private_data = h->drv[drv_index];
1780 disk->driverfs_dev = &h->drv[drv_index]->dev;
6ae5ce8e
MM		 1781
1782 /* Set up queue information */
1783 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1784
1785 /* This is a hardware imposed limit. */
1786 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1787
1788 /* This is a limit in the driver and could be eliminated. */
1789 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1790
1791 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1792
1793 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1794
1795 disk->queue->queuedata = h;
1796
e1defc4f 1797 blk_queue_logical_block_size(disk->queue,
9cef0d2f 1798 h->drv[drv_index]->block_size);
6ae5ce8e
MM		 1799
1800 /* Make sure all queue data is written out before */
9cef0d2f 1801 /* setting h->drv[drv_index]->queue, as setting this */
6ae5ce8e
MM		 1802 /* allows the interrupt handler to start the queue */
1803 wmb();
9cef0d2f 1804 h->drv[drv_index]->queue = disk->queue;
6ae5ce8e 1805 add_disk(disk);
617e1344
SC		 1806 return 0;
1807
1808cleanup_queue:
1809 blk_cleanup_queue(disk->queue);
1810 disk->queue = NULL;
e8074f79 1811init_queue_failure:
617e1344 1812 return -1;
6ae5ce8e
MM		 1813}
1814
ddd47442 1815/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1816 * If the usage_count is zero and it is a heretofore unknown drive, or,
1817 * the drive's capacity, geometry, or serial number has changed,
1818 * then the drive information will be updated and the disk will be
1819 * re-registered with the kernel. If these conditions don't hold,
1820 * then it will be left alone for the next reboot. The exception to this
1821 * is disk 0 which will always be left registered with the kernel since it
1822 * is also the controller node. Any changes to disk 0 will show up on
1823 * the next reboot.
7c832835 1824 */
2d11d993
SC		 1825static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1826 int via_ioctl)
7c832835 1827{
ddd47442
MM		 1828 ctlr_info_t *h = hba[ctlr];
1829 struct gendisk *disk;
ddd47442
MM		 1830 InquiryData_struct *inq_buff = NULL;
1831 unsigned int block_size;
00988a35 1832 sector_t total_size;
ddd47442
MM		 1833 unsigned long flags = 0;
1834 int ret = 0;
a72da29b
MM		 1835 drive_info_struct *drvinfo;
1836
1837 /* Get information about the disk and modify the driver structure */
1838 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 1839 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM		 1840 if (inq_buff == NULL || drvinfo == NULL)
1841 goto mem_msg;
1842
1843 /* testing to see if 16-byte CDBs are already being used */
1844 if (h->cciss_read == CCISS_READ_16) {
7b838bde 1845 cciss_read_capacity_16(h->ctlr, drv_index,
a72da29b
MM		 1846 &total_size, &block_size);
1847
1848 } else {
7b838bde 1849 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
a72da29b
MM		 1850 /* if read_capacity returns all F's this volume is >2TB */
1851 /* in size so we switch to 16-byte CDB's for all */
1852 /* read/write ops */
1853 if (total_size == 0xFFFFFFFFULL) {
7b838bde 1854 cciss_read_capacity_16(ctlr, drv_index,
a72da29b
MM		 1855 &total_size, &block_size);
1856 h->cciss_read = CCISS_READ_16;
1857 h->cciss_write = CCISS_WRITE_16;
1858 } else {
1859 h->cciss_read = CCISS_READ_10;
1860 h->cciss_write = CCISS_WRITE_10;
1861 }
1862 }
1863
7b838bde 1864 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
a72da29b
MM		 1865 inq_buff, drvinfo);
1866 drvinfo->block_size = block_size;
1867 drvinfo->nr_blocks = total_size + 1;
1868
7b838bde 1869 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
7fe06326 1870 drvinfo->model, drvinfo->rev);
7b838bde 1871 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
a72da29b 1872 sizeof(drvinfo->serial_no));
9cef0d2f
SC		 1873 /* Save the lunid in case we deregister the disk, below. */
1874 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1875 sizeof(drvinfo->LunID));
a72da29b
MM		 1876
1877 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 1878 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 1879 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC		 1880 h->drv[drv_index]->serial_no, 16) == 0) &&
1881 drvinfo->block_size == h->drv[drv_index]->block_size &&
1882 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1883 drvinfo->heads == h->drv[drv_index]->heads &&
1884 drvinfo->sectors == h->drv[drv_index]->sectors &&
1885 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM		 1886 /* The disk is unchanged, nothing to update */
1887 goto freeret;
a72da29b 1888
6ae5ce8e
MM		 1889 /* If we get here it's not the same disk, or something's changed,
1890 * so we need to * deregister it, and re-register it, if it's not
1891 * in use.
1892 * If the disk already exists then deregister it before proceeding
1893 * (unless it's the first disk (for the controller node).
1894 */
9cef0d2f 1895 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
a72da29b 1896 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442 1897 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 1898 h->drv[drv_index]->busy_configuring = 1;
ddd47442 1899 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1900
9cef0d2f 1901 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM		 1902 * which keeps the interrupt handler from starting
1903 * the queue.
1904 */
2d11d993 1905 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1906 }
1907
1908 /* If the disk is in use return */
1909 if (ret)
a72da29b
MM		 1910 goto freeret;
1911
6ae5ce8e 1912 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC		 1913 * and serial number inquiry. If the disk was deregistered
1914 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 1915 */
9cef0d2f
SC		 1916 if (h->drv[drv_index] == NULL) {
1917 drvinfo->device_initialized = 0;
1918 h->drv[drv_index] = drvinfo;
1919 drvinfo = NULL; /* so it won't be freed below. */
1920 } else {
1921 /* special case for cxd0 */
1922 h->drv[drv_index]->block_size = drvinfo->block_size;
1923 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
1924 h->drv[drv_index]->heads = drvinfo->heads;
1925 h->drv[drv_index]->sectors = drvinfo->sectors;
1926 h->drv[drv_index]->cylinders = drvinfo->cylinders;
1927 h->drv[drv_index]->raid_level = drvinfo->raid_level;
1928 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
1929 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
1930 VENDOR_LEN + 1);
1931 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
1932 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
1933 }
ddd47442
MM		 1934
1935 ++h->num_luns;
1936 disk = h->gendisk[drv_index];
9cef0d2f 1937 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 1938
6ae5ce8e
MM		 1939 /* If it's not disk 0 (drv_index != 0)
1940 * or if it was disk 0, but there was previously
1941 * no actual corresponding configured logical drive
1942 * (raid_leve == -1) then we want to update the
1943 * logical drive's information.
1944 */
361e9b07
SC		 1945 if (drv_index || first_time) {
1946 if (cciss_add_disk(h, disk, drv_index) != 0) {
1947 cciss_free_gendisk(h, drv_index);
9cef0d2f 1948 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 1949 printk(KERN_WARNING "cciss:%d could not update "
1950 "disk %d\n", h->ctlr, drv_index);
1951 --h->num_luns;
1952 }
1953 }
ddd47442 1954
6ae5ce8e 1955freeret:
ddd47442 1956 kfree(inq_buff);
a72da29b 1957 kfree(drvinfo);
ddd47442 1958 return;
6ae5ce8e 1959mem_msg:
ddd47442
MM		 1960 printk(KERN_ERR "cciss: out of memory\n");
1961 goto freeret;
1962}
1963
1964/* This function will find the first index of the controllers drive array
9cef0d2f
SC		 1965 * that has a null drv pointer and allocate the drive info struct and
1966 * will return that index This is where new drives will be added.
1967 * If the index to be returned is greater than the highest_lun index for
1968 * the controller then highest_lun is set * to this new index.
1969 * If there are no available indexes or if tha allocation fails, then -1
1970 * is returned. * "controller_node" is used to know if this is a real
1971 * logical drive, or just the controller node, which determines if this
1972 * counts towards highest_lun.
7c832835 1973 */
9cef0d2f 1974static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM		 1975{
1976 int i;
9cef0d2f 1977 drive_info_struct *drv;
ddd47442 1978
9cef0d2f 1979 /* Search for an empty slot for our drive info */
7c832835 1980 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC		 1981
1982 /* if not cxd0 case, and it's occupied, skip it. */
1983 if (h->drv[i] && i != 0)
1984 continue;
1985 /*
1986 * If it's cxd0 case, and drv is alloc'ed already, and a
1987 * disk is configured there, skip it.
1988 */
1989 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
1990 continue;
1991
1992 /*
1993 * We've found an empty slot. Update highest_lun
1994 * provided this isn't just the fake cxd0 controller node.
1995 */
1996 if (i > h->highest_lun && !controller_node)
1997 h->highest_lun = i;
1998
1999 /* If adding a real disk at cxd0, and it's already alloc'ed */
2000 if (i == 0 && h->drv[i] != NULL)
ddd47442 2001 return i;
9cef0d2f
SC		 2002
2003 /*
2004 * Found an empty slot, not already alloc'ed. Allocate it.
2005 * Mark it with raid_level == -1, so we know it's new later on.
2006 */
2007 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2008 if (!drv)
2009 return -1;
2010 drv->raid_level = -1; /* so we know it's new */
2011 h->drv[i] = drv;
2012 return i;
ddd47442
MM		 2013 }
2014 return -1;
2015}
2016
9cef0d2f
SC		 2017static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2018{
2019 kfree(h->drv[drv_index]);
2020 h->drv[drv_index] = NULL;
2021}
2022
361e9b07
SC		 2023static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2024{
2025 put_disk(h->gendisk[drv_index]);
2026 h->gendisk[drv_index] = NULL;
2027}
2028
6ae5ce8e
MM		 2029/* cciss_add_gendisk finds a free hba[]->drv structure
2030 * and allocates a gendisk if needed, and sets the lunid
2031 * in the drvinfo structure. It returns the index into
2032 * the ->drv[] array, or -1 if none are free.
2033 * is_controller_node indicates whether highest_lun should
2034 * count this disk, or if it's only being added to provide
2035 * a means to talk to the controller in case no logical
2036 * drives have yet been configured.
2037 */
39ccf9a6
SC		 2038static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2039 int controller_node)
6ae5ce8e
MM		 2040{
2041 int drv_index;
2042
9cef0d2f 2043 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM		 2044 if (drv_index == -1)
2045 return -1;
8ce51966 2046
6ae5ce8e
MM		 2047 /*Check if the gendisk needs to be allocated */
2048 if (!h->gendisk[drv_index]) {
2049 h->gendisk[drv_index] =
2050 alloc_disk(1 << NWD_SHIFT);
2051 if (!h->gendisk[drv_index]) {
2052 printk(KERN_ERR "cciss%d: could not "
2053 "allocate a new disk %d\n",
2054 h->ctlr, drv_index);
9cef0d2f 2055 goto err_free_drive_info;
6ae5ce8e
MM		 2056 }
2057 }
9cef0d2f
SC		 2058 memcpy(h->drv[drv_index]->LunID, lunid,
2059 sizeof(h->drv[drv_index]->LunID));
2060 if (cciss_create_ld_sysfs_entry(h, drv_index))
7fe06326 2061 goto err_free_disk;
6ae5ce8e
MM		 2062 /* Don't need to mark this busy because nobody */
2063 /* else knows about this disk yet to contend */
2064 /* for access to it. */
9cef0d2f 2065 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM		 2066 wmb();
2067 return drv_index;
7fe06326
AP		 2068
2069err_free_disk:
361e9b07 2070 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC		 2071err_free_drive_info:
2072 cciss_free_drive_info(h, drv_index);
7fe06326 2073 return -1;
6ae5ce8e
MM		 2074}
2075
2076/* This is for the special case of a controller which
2077 * has no logical drives. In this case, we still need
2078 * to register a disk so the controller can be accessed
2079 * by the Array Config Utility.
2080 */
2081static void cciss_add_controller_node(ctlr_info_t *h)
2082{
2083 struct gendisk *disk;
2084 int drv_index;
2085
2086 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2087 return;
2088
39ccf9a6 2089 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2090 if (drv_index == -1)
2091 goto error;
9cef0d2f
SC		 2092 h->drv[drv_index]->block_size = 512;
2093 h->drv[drv_index]->nr_blocks = 0;
2094 h->drv[drv_index]->heads = 0;
2095 h->drv[drv_index]->sectors = 0;
2096 h->drv[drv_index]->cylinders = 0;
2097 h->drv[drv_index]->raid_level = -1;
2098 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2099 disk = h->gendisk[drv_index];
361e9b07
SC		 2100 if (cciss_add_disk(h, disk, drv_index) == 0)
2101 return;
2102 cciss_free_gendisk(h, drv_index);
9cef0d2f 2103 cciss_free_drive_info(h, drv_index);
361e9b07
SC		 2104error:
2105 printk(KERN_WARNING "cciss%d: could not "
2106 "add disk 0.\n", h->ctlr);
2107 return;
6ae5ce8e
MM		 2108}
2109
ddd47442 2110/* This function will add and remove logical drives from the Logical
d14c4ab5 2111 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2112 * so that mount points are preserved until the next reboot. This allows
2113 * for the removal of logical drives in the middle of the drive array
2114 * without a re-ordering of those drives.
2115 * INPUT
2116 * h = The controller to perform the operations on
7c832835 2117 */
2d11d993
SC		 2118static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2119 int via_ioctl)
1da177e4 2120{
ddd47442
MM		 2121 int ctlr = h->ctlr;
2122 int num_luns;
2123 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2124 int return_code;
2125 int listlength = 0;
2126 int i;
2127 int drv_found;
2128 int drv_index = 0;
39ccf9a6 2129 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2130 unsigned long flags;
ddd47442 2131
6ae5ce8e
MM		 2132 if (!capable(CAP_SYS_RAWIO))
2133 return -EPERM;
2134
ddd47442
MM		 2135 /* Set busy_configuring flag for this operation */
2136 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2137 if (h->busy_configuring) {
ddd47442
MM		 2138 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2139 return -EBUSY;
2140 }
2141 h->busy_configuring = 1;
a72da29b 2142 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2143
a72da29b
MM		 2144 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2145 if (ld_buff == NULL)
2146 goto mem_msg;
2147
2148 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2149 sizeof(ReportLunData_struct),
2150 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2151
a72da29b
MM		 2152 if (return_code == IO_OK)
2153 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2154 else { /* reading number of logical volumes failed */
2155 printk(KERN_WARNING "cciss: report logical volume"
2156 " command failed\n");
2157 listlength = 0;
2158 goto freeret;
2159 }
2160
2161 num_luns = listlength / 8; /* 8 bytes per entry */
2162 if (num_luns > CISS_MAX_LUN) {
2163 num_luns = CISS_MAX_LUN;
2164 printk(KERN_WARNING "cciss: more luns configured"
2165 " on controller than can be handled by"
2166 " this driver.\n");
2167 }
2168
6ae5ce8e
MM		 2169 if (num_luns == 0)
2170 cciss_add_controller_node(h);
2171
2172 /* Compare controller drive array to driver's drive array
2173 * to see if any drives are missing on the controller due
2174 * to action of Array Config Utility (user deletes drive)
2175 * and deregister logical drives which have disappeared.
2176 */
a72da29b
MM		 2177 for (i = 0; i <= h->highest_lun; i++) {
2178 int j;
2179 drv_found = 0;
d8a0be6a
SC		 2180
2181 /* skip holes in the array from already deleted drives */
9cef0d2f 2182 if (h->drv[i] == NULL)
d8a0be6a
SC		 2183 continue;
2184
a72da29b 2185 for (j = 0; j < num_luns; j++) {
39ccf9a6 2186 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2187 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2188 sizeof(lunid)) == 0) {
a72da29b
MM		 2189 drv_found = 1;
2190 break;
2191 }
2192 }
2193 if (!drv_found) {
2194 /* Deregister it from the OS, it's gone. */
2195 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
9cef0d2f 2196 h->drv[i]->busy_configuring = 1;
a72da29b 2197 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2198 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC		 2199 if (h->drv[i] != NULL)
2200 h->drv[i]->busy_configuring = 0;
ddd47442 2201 }
a72da29b 2202 }
ddd47442 2203
a72da29b
MM		 2204 /* Compare controller drive array to driver's drive array.
2205 * Check for updates in the drive information and any new drives
2206 * on the controller due to ACU adding logical drives, or changing
2207 * a logical drive's size, etc. Reregister any new/changed drives
2208 */
2209 for (i = 0; i < num_luns; i++) {
2210 int j;
ddd47442 2211
a72da29b 2212 drv_found = 0;
ddd47442 2213
39ccf9a6 2214 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2215 /* Find if the LUN is already in the drive array
2216 * of the driver. If so then update its info
2217 * if not in use. If it does not exist then find
2218 * the first free index and add it.
2219 */
2220 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC		 2221 if (h->drv[j] != NULL &&
2222 memcmp(h->drv[j]->LunID, lunid,
2223 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM		 2224 drv_index = j;
2225 drv_found = 1;
2226 break;
ddd47442 2227 }
a72da29b 2228 }
ddd47442 2229
a72da29b
MM		 2230 /* check if the drive was found already in the array */
2231 if (!drv_found) {
eece695f 2232 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2233 if (drv_index == -1)
2234 goto freeret;
a72da29b 2235 }
2d11d993
SC		 2236 cciss_update_drive_info(ctlr, drv_index, first_time,
2237 via_ioctl);
a72da29b 2238 } /* end for */
ddd47442 2239
6ae5ce8e 2240freeret:
ddd47442
MM		 2241 kfree(ld_buff);
2242 h->busy_configuring = 0;
2243 /* We return -1 here to tell the ACU that we have registered/updated
2244 * all of the drives that we can and to keep it from calling us
2245 * additional times.
7c832835 2246 */
ddd47442 2247 return -1;
6ae5ce8e 2248mem_msg:
ddd47442 2249 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2250 h->busy_configuring = 0;
ddd47442
MM		 2251 goto freeret;
2252}
2253
9ddb27b4
SC		 2254static void cciss_clear_drive_info(drive_info_struct *drive_info)
2255{
2256 /* zero out the disk size info */
2257 drive_info->nr_blocks = 0;
2258 drive_info->block_size = 0;
2259 drive_info->heads = 0;
2260 drive_info->sectors = 0;
2261 drive_info->cylinders = 0;
2262 drive_info->raid_level = -1;
2263 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2264 memset(drive_info->model, 0, sizeof(drive_info->model));
2265 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2266 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2267 /*
2268 * don't clear the LUNID though, we need to remember which
2269 * one this one is.
2270 */
2271}
2272
ddd47442
MM		 2273/* This function will deregister the disk and it's queue from the
2274 * kernel. It must be called with the controller lock held and the
2275 * drv structures busy_configuring flag set. It's parameters are:
2276 *
2277 * disk = This is the disk to be deregistered
2278 * drv = This is the drive_info_struct associated with the disk to be
2279 * deregistered. It contains information about the disk used
2280 * by the driver.
2281 * clear_all = This flag determines whether or not the disk information
2282 * is going to be completely cleared out and the highest_lun
2283 * reset. Sometimes we want to clear out information about
d14c4ab5 2284 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2285 * the highest_lun should be left unchanged and the LunID
2286 * should not be cleared.
2d11d993
SC		 2287 * via_ioctl
2288 * This indicates whether we've reached this path via ioctl.
2289 * This affects the maximum usage count allowed for c0d0 to be messed with.
2290 * If this path is reached via ioctl(), then the max_usage_count will
2291 * be 1, as the process calling ioctl() has got to have the device open.
2292 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2293*/
a0ea8622 2294static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2295 int clear_all, int via_ioctl)
ddd47442 2296{
799202cb 2297 int i;
a0ea8622
SC		 2298 struct gendisk *disk;
2299 drive_info_struct *drv;
9cef0d2f 2300 int recalculate_highest_lun;
1da177e4
LT		 2301
2302 if (!capable(CAP_SYS_RAWIO))
2303 return -EPERM;
2304
9cef0d2f 2305 drv = h->drv[drv_index];
a0ea8622
SC		 2306 disk = h->gendisk[drv_index];
2307
1da177e4 2308 /* make sure logical volume is NOT is use */
7c832835 2309 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2310 if (drv->usage_count > via_ioctl)
7c832835
BH		 2311 return -EBUSY;
2312 } else if (drv->usage_count > 0)
2313 return -EBUSY;
1da177e4 2314
9cef0d2f
SC		 2315 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2316
ddd47442
MM		 2317 /* invalidate the devices and deregister the disk. If it is disk
2318 * zero do not deregister it but just zero out it's values. This
2319 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2320 */
2321 if (h->gendisk[0] != disk) {
5a9df732 2322 struct request_queue *q = disk->queue;
097d0264 2323 if (disk->flags & GENHD_FL_UP) {
8ce51966 2324 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2325 del_gendisk(disk);
5a9df732 2326 }
9cef0d2f 2327 if (q)
5a9df732 2328 blk_cleanup_queue(q);
5a9df732
AB		 2329 /* If clear_all is set then we are deleting the logical
2330 * drive, not just refreshing its info. For drives
2331 * other than disk 0 we will call put_disk. We do not
2332 * do this for disk 0 as we need it to be able to
2333 * configure the controller.
a72da29b 2334 */
5a9df732
AB		 2335 if (clear_all){
2336 /* This isn't pretty, but we need to find the
2337 * disk in our array and NULL our the pointer.
2338 * This is so that we will call alloc_disk if
2339 * this index is used again later.
a72da29b 2340 */
5a9df732 2341 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2342 if (h->gendisk[i] == disk) {
5a9df732
AB		 2343 h->gendisk[i] = NULL;
2344 break;
799202cb 2345 }
799202cb 2346 }
5a9df732 2347 put_disk(disk);
ddd47442 2348 }
799202cb
MM		 2349 } else {
2350 set_capacity(disk, 0);
9cef0d2f 2351 cciss_clear_drive_info(drv);
ddd47442
MM		 2352 }
2353
2354 --h->num_luns;
ddd47442 2355
9cef0d2f
SC		 2356 /* if it was the last disk, find the new hightest lun */
2357 if (clear_all && recalculate_highest_lun) {
2358 int i, newhighest = -1;
2359 for (i = 0; i <= h->highest_lun; i++) {
2360 /* if the disk has size > 0, it is available */
2361 if (h->drv[i] && h->drv[i]->heads)
2362 newhighest = i;
1da177e4 2363 }
9cef0d2f 2364 h->highest_lun = newhighest;
ddd47442 2365 }
e2019b58 2366 return 0;
1da177e4 2367}
ddd47442 2368
b57695fe 2369static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2370 size_t size, __u8 page_code, unsigned char *scsi3addr,
2371 int cmd_type)
1da177e4 2372{
7c832835 2373 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2374 u64bit buff_dma_handle;
2375 int status = IO_OK;
2376
2377 c->cmd_type = CMD_IOCTL_PEND;
2378 c->Header.ReplyQueue = 0;
7c832835 2379 if (buff != NULL) {
1da177e4 2380 c->Header.SGList = 1;
7c832835 2381 c->Header.SGTotal = 1;
1da177e4
LT		 2382 } else {
2383 c->Header.SGList = 0;
7c832835 2384 c->Header.SGTotal = 0;
1da177e4
LT		 2385 }
2386 c->Header.Tag.lower = c->busaddr;
b57695fe 2387 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2388
2389 c->Request.Type.Type = cmd_type;
2390 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2391 switch (cmd) {
2392 case CISS_INQUIRY:
1da177e4 2393 /* are we trying to read a vital product page */
7c832835 2394 if (page_code != 0) {
1da177e4
LT		 2395 c->Request.CDB[1] = 0x01;
2396 c->Request.CDB[2] = page_code;
2397 }
2398 c->Request.CDBLen = 6;
7c832835 2399 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2400 c->Request.Type.Direction = XFER_READ;
2401 c->Request.Timeout = 0;
7c832835
BH		 2402 c->Request.CDB[0] = CISS_INQUIRY;
2403 c->Request.CDB[4] = size & 0xFF;
2404 break;
1da177e4
LT		 2405 case CISS_REPORT_LOG:
2406 case CISS_REPORT_PHYS:
7c832835 2407 /* Talking to controller so It's a physical command
1da177e4 2408 mode = 00 target = 0. Nothing to write.
7c832835 2409 */
1da177e4
LT		 2410 c->Request.CDBLen = 12;
2411 c->Request.Type.Attribute = ATTR_SIMPLE;
2412 c->Request.Type.Direction = XFER_READ;
2413 c->Request.Timeout = 0;
2414 c->Request.CDB[0] = cmd;
7c832835 2415 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2416 c->Request.CDB[7] = (size >> 16) & 0xFF;
2417 c->Request.CDB[8] = (size >> 8) & 0xFF;
2418 c->Request.CDB[9] = size & 0xFF;
2419 break;
2420
2421 case CCISS_READ_CAPACITY:
1da177e4
LT		 2422 c->Request.CDBLen = 10;
2423 c->Request.Type.Attribute = ATTR_SIMPLE;
2424 c->Request.Type.Direction = XFER_READ;
2425 c->Request.Timeout = 0;
2426 c->Request.CDB[0] = cmd;
7c832835 2427 break;
00988a35 2428 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2429 c->Request.CDBLen = 16;
2430 c->Request.Type.Attribute = ATTR_SIMPLE;
2431 c->Request.Type.Direction = XFER_READ;
2432 c->Request.Timeout = 0;
2433 c->Request.CDB[0] = cmd;
2434 c->Request.CDB[1] = 0x10;
2435 c->Request.CDB[10] = (size >> 24) & 0xFF;
2436 c->Request.CDB[11] = (size >> 16) & 0xFF;
2437 c->Request.CDB[12] = (size >> 8) & 0xFF;
2438 c->Request.CDB[13] = size & 0xFF;
2439 c->Request.Timeout = 0;
2440 c->Request.CDB[0] = cmd;
2441 break;
1da177e4
LT		 2442 case CCISS_CACHE_FLUSH:
2443 c->Request.CDBLen = 12;
2444 c->Request.Type.Attribute = ATTR_SIMPLE;
2445 c->Request.Type.Direction = XFER_WRITE;
2446 c->Request.Timeout = 0;
2447 c->Request.CDB[0] = BMIC_WRITE;
2448 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2449 break;
88f627ae 2450 case TEST_UNIT_READY:
88f627ae
SC		 2451 c->Request.CDBLen = 6;
2452 c->Request.Type.Attribute = ATTR_SIMPLE;
2453 c->Request.Type.Direction = XFER_NONE;
2454 c->Request.Timeout = 0;
2455 break;
1da177e4
LT		 2456 default:
2457 printk(KERN_WARNING
7c832835 2458 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2459 return IO_ERROR;
1da177e4
LT		 2460 }
2461 } else if (cmd_type == TYPE_MSG) {
2462 switch (cmd) {
7c832835 2463 case 0: /* ABORT message */
3da8b713 2464 c->Request.CDBLen = 12;
2465 c->Request.Type.Attribute = ATTR_SIMPLE;
2466 c->Request.Type.Direction = XFER_WRITE;
2467 c->Request.Timeout = 0;
7c832835
BH		 2468 c->Request.CDB[0] = cmd; /* abort */
2469 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2470 /* buff contains the tag of the command to abort */
2471 memcpy(&c->Request.CDB[4], buff, 8);
2472 break;
7c832835 2473 case 1: /* RESET message */
88f627ae 2474 c->Request.CDBLen = 16;
3da8b713 2475 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2476 c->Request.Type.Direction = XFER_NONE;
3da8b713 2477 c->Request.Timeout = 0;
2478 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2479 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2480 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2481 break;
1da177e4
LT		 2482 case 3: /* No-Op message */
2483 c->Request.CDBLen = 1;
2484 c->Request.Type.Attribute = ATTR_SIMPLE;
2485 c->Request.Type.Direction = XFER_WRITE;
2486 c->Request.Timeout = 0;
2487 c->Request.CDB[0] = cmd;
2488 break;
2489 default:
2490 printk(KERN_WARNING
7c832835 2491 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2492 return IO_ERROR;
2493 }
2494 } else {
2495 printk(KERN_WARNING
7c832835 2496 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2497 return IO_ERROR;
2498 }
2499 /* Fill in the scatter gather information */
2500 if (size > 0) {
2501 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2502 buff, size,
2503 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2504 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2505 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2506 c->SG[0].Len = size;
7c832835 2507 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2508 }
2509 return status;
2510}
7c832835 2511
3c2ab402 2512static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2513{
2514 switch (c->err_info->ScsiStatus) {
2515 case SAM_STAT_GOOD:
2516 return IO_OK;
2517 case SAM_STAT_CHECK_CONDITION:
2518 switch (0xf & c->err_info->SenseInfo[2]) {
2519 case 0: return IO_OK; /* no sense */
2520 case 1: return IO_OK; /* recovered error */
2521 default:
c08fac65
SC		 2522 if (check_for_unit_attention(h, c))
2523 return IO_NEEDS_RETRY;
3c2ab402 2524 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2525 "check condition, sense key = 0x%02x\n",
2526 h->ctlr, c->Request.CDB[0],
2527 c->err_info->SenseInfo[2]);
2528 }
2529 break;
2530 default:
2531 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2532 "scsi status = 0x%02x\n", h->ctlr,
2533 c->Request.CDB[0], c->err_info->ScsiStatus);
2534 break;
2535 }
2536 return IO_ERROR;
2537}
2538
789a424a 2539static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2540{
5390cfc3 2541 int return_status = IO_OK;
7c832835 2542
789a424a 2543 if (c->err_info->CommandStatus == CMD_SUCCESS)
2544 return IO_OK;
5390cfc3 2545
2546 switch (c->err_info->CommandStatus) {
2547 case CMD_TARGET_STATUS:
3c2ab402 2548 return_status = check_target_status(h, c);
5390cfc3 2549 break;
2550 case CMD_DATA_UNDERRUN:
2551 case CMD_DATA_OVERRUN:
2552 /* expected for inquiry and report lun commands */
2553 break;
2554 case CMD_INVALID:
789a424a 2555 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2556 "reported invalid\n", c->Request.CDB[0]);
2557 return_status = IO_ERROR;
2558 break;
2559 case CMD_PROTOCOL_ERR:
2560 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2561 "protocol error \n", c->Request.CDB[0]);
2562 return_status = IO_ERROR;
2563 break;
2564 case CMD_HARDWARE_ERR:
2565 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2566 " hardware error\n", c->Request.CDB[0]);
2567 return_status = IO_ERROR;
2568 break;
2569 case CMD_CONNECTION_LOST:
2570 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2571 "connection lost\n", c->Request.CDB[0]);
2572 return_status = IO_ERROR;
2573 break;
2574 case CMD_ABORTED:
2575 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2576 "aborted\n", c->Request.CDB[0]);
2577 return_status = IO_ERROR;
2578 break;
2579 case CMD_ABORT_FAILED:
2580 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2581 "abort failed\n", c->Request.CDB[0]);
2582 return_status = IO_ERROR;
2583 break;
2584 case CMD_UNSOLICITED_ABORT:
2585 printk(KERN_WARNING
2586 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2587 c->Request.CDB[0]);
789a424a 2588 return_status = IO_NEEDS_RETRY;
5390cfc3 2589 break;
2590 default:
2591 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2592 "unknown status %x\n", c->Request.CDB[0],
2593 c->err_info->CommandStatus);
2594 return_status = IO_ERROR;
7c832835 2595 }
789a424a 2596 return return_status;
2597}
2598
2599static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2600 int attempt_retry)
2601{
2602 DECLARE_COMPLETION_ONSTACK(wait);
2603 u64bit buff_dma_handle;
2604 unsigned long flags;
2605 int return_status = IO_OK;
2606
2607resend_cmd2:
2608 c->waiting = &wait;
2609 /* Put the request on the tail of the queue and send it */
2610 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2611 addQ(&h->reqQ, c);
2612 h->Qdepth++;
2613 start_io(h);
2614 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2615
2616 wait_for_completion(&wait);
2617
2618 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2619 goto command_done;
2620
2621 return_status = process_sendcmd_error(h, c);
2622
2623 if (return_status == IO_NEEDS_RETRY &&
2624 c->retry_count < MAX_CMD_RETRIES) {
2625 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2626 c->Request.CDB[0]);
2627 c->retry_count++;
2628 /* erase the old error information */
2629 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2630 return_status = IO_OK;
2631 INIT_COMPLETION(wait);
2632 goto resend_cmd2;
2633 }
5390cfc3 2634
2635command_done:
1da177e4 2636 /* unlock the buffers from DMA */
bb2a37bf
MM		 2637 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2638 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2639 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2640 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2641 return return_status;
2642}
2643
b57695fe 2644static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2645 __u8 page_code, unsigned char scsi3addr[],
2646 int cmd_type)
5390cfc3 2647{
2648 ctlr_info_t *h = hba[ctlr];
2649 CommandList_struct *c;
2650 int return_status;
2651
2652 c = cmd_alloc(h, 0);
2653 if (!c)
2654 return -ENOMEM;
b57695fe 2655 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2656 scsi3addr, cmd_type);
5390cfc3 2657 if (return_status == IO_OK)
789a424a 2658 return_status = sendcmd_withirq_core(h, c, 1);
2659
1da177e4 2660 cmd_free(h, c, 0);
7c832835 2661 return return_status;
1da177e4 2662}
7c832835 2663
1da177e4 2664static void cciss_geometry_inquiry(int ctlr, int logvol,
7b838bde 2665 sector_t total_size,
7c832835
BH		 2666 unsigned int block_size,
2667 InquiryData_struct *inq_buff,
2668 drive_info_struct *drv)
1da177e4
LT		 2669{
2670 int return_code;
00988a35 2671 unsigned long t;
b57695fe 2672 unsigned char scsi3addr[8];
00988a35 2673
1da177e4 2674 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2675 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2676 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2677 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
1da177e4 2678 if (return_code == IO_OK) {
7c832835 2679 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2680 printk(KERN_WARNING
7c832835
BH		 2681 "cciss: reading geometry failed, volume "
2682 "does not support reading geometry\n");
1da177e4 2683 drv->heads = 255;
7c832835 2684 drv->sectors = 32; // Sectors per track
7f42d3b8 2685 drv->cylinders = total_size + 1;
89f97ad1 2686 drv->raid_level = RAID_UNKNOWN;
1da177e4 2687 } else {
1da177e4
LT		 2688 drv->heads = inq_buff->data_byte[6];
2689 drv->sectors = inq_buff->data_byte[7];
2690 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2691 drv->cylinders += inq_buff->data_byte[5];
2692 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2693 }
2694 drv->block_size = block_size;
97c06978 2695 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2696 t = drv->heads * drv->sectors;
2697 if (t > 1) {
97c06978
MMOD		 2698 sector_t real_size = total_size + 1;
2699 unsigned long rem = sector_div(real_size, t);
3f7705ea 2700 if (rem)
97c06978
MMOD		 2701 real_size++;
2702 drv->cylinders = real_size;
1da177e4 2703 }
7c832835 2704 } else { /* Get geometry failed */
1da177e4
LT		 2705 printk(KERN_WARNING "cciss: reading geometry failed\n");
2706 }
1da177e4 2707}
7c832835 2708
1da177e4 2709static void
7b838bde 2710cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
7c832835 2711 unsigned int *block_size)
1da177e4 2712{
00988a35 2713 ReadCapdata_struct *buf;
1da177e4 2714 int return_code;
b57695fe 2715 unsigned char scsi3addr[8];
1aebe187
MK		 2716
2717 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2718 if (!buf) {
00988a35
MMOD		 2719 printk(KERN_WARNING "cciss: out of memory\n");
2720 return;
2721 }
1aebe187 2722
b57695fe 2723 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2724 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2725 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
1da177e4 2726 if (return_code == IO_OK) {
4c1f2b31
AV		 2727 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2728 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2729 } else { /* read capacity command failed */
1da177e4
LT		 2730 printk(KERN_WARNING "cciss: read capacity failed\n");
2731 *total_size = 0;
2732 *block_size = BLOCK_SIZE;
2733 }
00988a35 2734 kfree(buf);
00988a35
MMOD		 2735}
2736
7b838bde
SC		 2737static void cciss_read_capacity_16(int ctlr, int logvol,
2738 sector_t *total_size, unsigned int *block_size)
00988a35
MMOD		 2739{
2740 ReadCapdata_struct_16 *buf;
2741 int return_code;
b57695fe 2742 unsigned char scsi3addr[8];
1aebe187
MK		 2743
2744 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2745 if (!buf) {
00988a35
MMOD		 2746 printk(KERN_WARNING "cciss: out of memory\n");
2747 return;
2748 }
1aebe187 2749
b57695fe 2750 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7b838bde
SC		 2751 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2752 ctlr, buf, sizeof(ReadCapdata_struct_16),
2753 0, scsi3addr, TYPE_CMD);
00988a35 2754 if (return_code == IO_OK) {
4c1f2b31
AV		 2755 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2756 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2757 } else { /* read capacity command failed */
2758 printk(KERN_WARNING "cciss: read capacity failed\n");
2759 *total_size = 0;
2760 *block_size = BLOCK_SIZE;
2761 }
7b92aadf 2762 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2763 (unsigned long long)*total_size+1, *block_size);
00988a35 2764 kfree(buf);
1da177e4
LT		 2765}
2766
1da177e4
LT		 2767static int cciss_revalidate(struct gendisk *disk)
2768{
2769 ctlr_info_t *h = get_host(disk);
2770 drive_info_struct *drv = get_drv(disk);
2771 int logvol;
7c832835 2772 int FOUND = 0;
1da177e4 2773 unsigned int block_size;
00988a35 2774 sector_t total_size;
1da177e4
LT		 2775 InquiryData_struct *inq_buff = NULL;
2776
7c832835 2777 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
9cef0d2f 2778 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2779 sizeof(drv->LunID)) == 0) {
7c832835 2780 FOUND = 1;
1da177e4
LT		 2781 break;
2782 }
2783 }
2784
7c832835
BH		 2785 if (!FOUND)
2786 return 1;
1da177e4 2787
7c832835
BH		 2788 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2789 if (inq_buff == NULL) {
2790 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2791 return 1;
2792 }
00988a35 2793 if (h->cciss_read == CCISS_READ_10) {
7b838bde 2794 cciss_read_capacity(h->ctlr, logvol,
00988a35
MMOD		 2795 &total_size, &block_size);
2796 } else {
7b838bde 2797 cciss_read_capacity_16(h->ctlr, logvol,
00988a35
MMOD		 2798 &total_size, &block_size);
2799 }
7b838bde 2800 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
7c832835 2801 inq_buff, drv);
1da177e4 2802
e1defc4f 2803 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2804 set_capacity(disk, drv->nr_blocks);
2805
1da177e4
LT		 2806 kfree(inq_buff);
2807 return 0;
2808}
2809
2810/*
2811 * Wait polling for a command to complete.
2812 * The memory mapped FIFO is polled for the completion.
2813 * Used only at init time, interrupts from the HBA are disabled.
2814 */
2815static unsigned long pollcomplete(int ctlr)
2816{
2817 unsigned long done;
2818 int i;
2819
2820 /* Wait (up to 20 seconds) for a command to complete */
2821
2822 for (i = 20 * HZ; i > 0; i--) {
2823 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2824 if (done == FIFO_EMPTY)
2825 schedule_timeout_uninterruptible(1);
2826 else
e2019b58 2827 return done;
1da177e4
LT		 2828 }
2829 /* Invalid address to tell caller we ran out of time */
2830 return 1;
2831}
3da8b713 2832
4a4b2d76
SC		 2833/* Send command c to controller h and poll for it to complete.
2834 * Turns interrupts off on the board. Used at driver init time
2835 * and during SCSI error recovery.
1da177e4 2836 */
4a4b2d76 2837static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2838{
1da177e4
LT		 2839 int i;
2840 unsigned long complete;
4a4b2d76 2841 int status = IO_ERROR;
1da177e4 2842 u64bit buff_dma_handle;
1da177e4 2843
4a4b2d76
SC		 2844resend_cmd1:
2845
2846 /* Disable interrupt on the board. */
2847 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2848
1da177e4 2849 /* Make sure there is room in the command FIFO */
7c832835 2850 /* Actually it should be completely empty at this time */
3da8b713 2851 /* unless we are in here doing error handling for the scsi */
2852 /* tape side of the driver. */
7c832835 2853 for (i = 200000; i > 0; i--) {
1da177e4 2854 /* if fifo isn't full go */
4a4b2d76 2855 if (!(h->access.fifo_full(h)))
7c832835 2856 break;
7c832835
BH		 2857 udelay(10);
2858 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2859 " waiting!\n", h->ctlr);
7c832835 2860 }
4a4b2d76 2861 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2862 do {
4a4b2d76 2863 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2864
2865#ifdef CCISS_DEBUG
3da8b713 2866 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2867#endif /* CCISS_DEBUG */
1da177e4 2868
3da8b713 2869 if (complete == 1) {
7c832835
BH		 2870 printk(KERN_WARNING
2871 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2872 "No command list address returned!\n", h->ctlr);
3da8b713 2873 status = IO_ERROR;
3da8b713 2874 break;
2875 }
2876
72f9f132 2877 /* Make sure it's the command we're expecting. */
4a4b2d76 2878 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2879 printk(KERN_WARNING "cciss%d: Unexpected command "
2880 "completion.\n", h->ctlr);
4a4b2d76
SC		 2881 continue;
2882 }
2883
2884 /* It is our command. If no error, we're done. */
2885 if (!(complete & CISS_ERROR_BIT)) {
2886 status = IO_OK;
2887 break;
2888 }
2889
2890 /* There is an error... */
2891
2892 /* if data overrun or underun on Report command ignore it */
2893 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2894 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2895 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2896 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2897 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2898 complete = c->busaddr;
2899 status = IO_OK;
2900 break;
1da177e4 2901 }
4a4b2d76
SC		 2902
2903 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2904 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2905 h->ctlr, c);
2906 if (c->retry_count < MAX_CMD_RETRIES) {
2907 printk(KERN_WARNING "cciss%d: retrying %p\n",
2908 h->ctlr, c);
2909 c->retry_count++;
2910 /* erase the old error information */
2911 memset(c->err_info, 0, sizeof(c->err_info));
2912 goto resend_cmd1;
3da8b713 2913 }
4a4b2d76
SC		 2914 printk(KERN_WARNING "cciss%d: retried %p too many "
2915 "times\n", h->ctlr, c);
2916 status = IO_ERROR;
3c2ab402 2917 break;
4a4b2d76
SC		 2918 }
2919
2920 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2921 printk(KERN_WARNING "cciss%d: command could not be "
2922 "aborted.\n", h->ctlr);
2923 status = IO_ERROR;
3c2ab402 2924 break;
4a4b2d76
SC		 2925 }
2926
4a4b2d76 2927 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2928 status = check_target_status(h, c);
2929 break;
4a4b2d76
SC		 2930 }
2931
3c2ab402 2932 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2933 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2934 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2935 status = IO_ERROR;
3c2ab402 2936 break;
4a4b2d76
SC		 2937
2938 } while (1);
7c832835 2939
1da177e4 2940 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2941 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2942 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2943 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2944 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2945 return status;
2946}
2947
2948/*
2949 * Send a command to the controller, and wait for it to complete.
2950 * Used at init time, and during SCSI error recovery.
2951 */
2952static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2953 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2954{
2955 CommandList_struct *c;
2956 int status;
2957
2958 c = cmd_alloc(hba[ctlr], 1);
2959 if (!c) {
2960 printk(KERN_WARNING "cciss: unable to get memory");
2961 return IO_ERROR;
2962 }
b57695fe 2963 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2964 scsi3addr, cmd_type);
4a4b2d76
SC		 2965 if (status == IO_OK)
2966 status = sendcmd_core(hba[ctlr], c);
2967 cmd_free(hba[ctlr], c, 1);
e2019b58 2968 return status;
7c832835
BH		 2969}
2970
1da177e4
LT		 2971/*
2972 * Map (physical) PCI mem into (virtual) kernel space
2973 */
2974static void __iomem *remap_pci_mem(ulong base, ulong size)
2975{
7c832835
BH		 2976 ulong page_base = ((ulong) base) & PAGE_MASK;
2977 ulong page_offs = ((ulong) base) - page_base;
2978 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2979
7c832835 2980 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2981}
2982
7c832835
BH		 2983/*
2984 * Takes jobs of the Q and sends them to the hardware, then puts it on
2985 * the Q to wait for completion.
2986 */
2987static void start_io(ctlr_info_t *h)
1da177e4
LT		 2988{
2989 CommandList_struct *c;
7c832835 2990
8a3173de
JA		 2991 while (!hlist_empty(&h->reqQ)) {
2992 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2993 /* can't do anything if fifo is full */
2994 if ((h->access.fifo_full(h))) {
2995 printk(KERN_WARNING "cciss: fifo full\n");
2996 break;
2997 }
2998
7c832835 2999 /* Get the first entry from the Request Q */
8a3173de 3000 removeQ(c);
1da177e4 3001 h->Qdepth--;
7c832835
BH		 3002
3003 /* Tell the controller execute command */
1da177e4 3004 h->access.submit_command(h, c);
7c832835
BH		 3005
3006 /* Put job onto the completed Q */
8a3173de 3007 addQ(&h->cmpQ, c);
1da177e4
LT		 3008 }
3009}
7c832835 3010
1da177e4
LT		 3011/* Assumes that CCISS_LOCK(h->ctlr) is held. */
3012/* Zeros out the error record and then resends the command back */
3013/* to the controller */
7c832835 3014static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 3015{
3016 /* erase the old error information */
3017 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
3018
3019 /* add it to software queue and then send it to the controller */
8a3173de 3020 addQ(&h->reqQ, c);
1da177e4 3021 h->Qdepth++;
7c832835 3022 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 3023 h->maxQsinceinit = h->Qdepth;
3024
3025 start_io(h);
3026}
a9925a06 3027
1a614f50
SC		 3028static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
3029 unsigned int msg_byte, unsigned int host_byte,
3030 unsigned int driver_byte)
3031{
3032 /* inverse of macros in scsi.h */
3033 return (scsi_status_byte & 0xff) |
3034 ((msg_byte & 0xff) << 8) |
3035 ((host_byte & 0xff) << 16) |
3036 ((driver_byte & 0xff) << 24);
3037}
3038
0a9279cc
MM		 3039static inline int evaluate_target_status(ctlr_info_t *h,
3040 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 3041{
3042 unsigned char sense_key;
1a614f50
SC		 3043 unsigned char status_byte, msg_byte, host_byte, driver_byte;
3044 int error_value;
3045
0a9279cc 3046 *retry_cmd = 0;
1a614f50
SC		 3047 /* If we get in here, it means we got "target status", that is, scsi status */
3048 status_byte = cmd->err_info->ScsiStatus;
3049 driver_byte = DRIVER_OK;
3050 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
3051
3052 if (blk_pc_request(cmd->rq))
3053 host_byte = DID_PASSTHROUGH;
3054 else
3055 host_byte = DID_OK;
3056
3057 error_value = make_status_bytes(status_byte, msg_byte,
3058 host_byte, driver_byte);
03bbfee5 3059
1a614f50 3060 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 3061 if (!blk_pc_request(cmd->rq))
3062 printk(KERN_WARNING "cciss: cmd %p "
3063 "has SCSI Status 0x%x\n",
3064 cmd, cmd->err_info->ScsiStatus);
1a614f50 3065 return error_value;
03bbfee5
MMOD		 3066 }
3067
3068 /* check the sense key */
3069 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3070 /* no status or recovered error */
1a614f50
SC		 3071 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
3072 error_value = 0;
03bbfee5 3073
0a9279cc
MM		 3074 if (check_for_unit_attention(h, cmd)) {
3075 *retry_cmd = !blk_pc_request(cmd->rq);
3076 return 0;
3077 }
3078
03bbfee5 3079 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 3080 if (error_value != 0)
03bbfee5
MMOD		 3081 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
3082 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3083 return error_value;
03bbfee5
MMOD		 3084 }
3085
3086 /* SG_IO or similar, copy sense data back */
3087 if (cmd->rq->sense) {
3088 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3089 cmd->rq->sense_len = cmd->err_info->SenseLen;
3090 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3091 cmd->rq->sense_len);
3092 } else
3093 cmd->rq->sense_len = 0;
3094
1a614f50 3095 return error_value;
03bbfee5
MMOD		 3096}
3097
7c832835 3098/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3099 * buffers for the completed job. Note that this function does not need
3100 * to hold the hba/queue lock.
7c832835
BH		 3101 */
3102static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3103 int timeout)
1da177e4 3104{
1da177e4 3105 int retry_cmd = 0;
198b7660
MMOD		 3106 struct request *rq = cmd->rq;
3107
3108 rq->errors = 0;
7c832835 3109
1da177e4 3110 if (timeout)
1a614f50 3111 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3112
d38ae168
MMOD		 3113 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3114 goto after_error_processing;
7c832835 3115
d38ae168 3116 switch (cmd->err_info->CommandStatus) {
d38ae168 3117 case CMD_TARGET_STATUS:
0a9279cc 3118 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3119 break;
3120 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3121 if (blk_fs_request(cmd->rq)) {
3122 printk(KERN_WARNING "cciss: cmd %p has"
3123 " completed with data underrun "
3124 "reported\n", cmd);
c3a4d78c 3125 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3126 }
d38ae168
MMOD		 3127 break;
3128 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3129 if (blk_fs_request(cmd->rq))
3130 printk(KERN_WARNING "cciss: cmd %p has"
3131 " completed with data overrun "
3132 "reported\n", cmd);
d38ae168
MMOD		 3133 break;
3134 case CMD_INVALID:
3135 printk(KERN_WARNING "cciss: cmd %p is "
3136 "reported invalid\n", cmd);
1a614f50
SC		 3137 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3138 cmd->err_info->CommandStatus, DRIVER_OK,
3139 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3140 break;
3141 case CMD_PROTOCOL_ERR:
3142 printk(KERN_WARNING "cciss: cmd %p has "
3143 "protocol error \n", cmd);
1a614f50
SC		 3144 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3145 cmd->err_info->CommandStatus, DRIVER_OK,
3146 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3147 break;
3148 case CMD_HARDWARE_ERR:
3149 printk(KERN_WARNING "cciss: cmd %p had "
3150 " hardware error\n", cmd);
1a614f50
SC		 3151 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3152 cmd->err_info->CommandStatus, DRIVER_OK,
3153 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3154 break;
3155 case CMD_CONNECTION_LOST:
3156 printk(KERN_WARNING "cciss: cmd %p had "
3157 "connection lost\n", cmd);
1a614f50
SC		 3158 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3159 cmd->err_info->CommandStatus, DRIVER_OK,
3160 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3161 break;
3162 case CMD_ABORTED:
3163 printk(KERN_WARNING "cciss: cmd %p was "
3164 "aborted\n", cmd);
1a614f50
SC		 3165 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3166 cmd->err_info->CommandStatus, DRIVER_OK,
3167 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3168 break;
3169 case CMD_ABORT_FAILED:
3170 printk(KERN_WARNING "cciss: cmd %p reports "
3171 "abort failed\n", cmd);
1a614f50
SC		 3172 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3173 cmd->err_info->CommandStatus, DRIVER_OK,
3174 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3175 break;
3176 case CMD_UNSOLICITED_ABORT:
3177 printk(KERN_WARNING "cciss%d: unsolicited "
3178 "abort %p\n", h->ctlr, cmd);
3179 if (cmd->retry_count < MAX_CMD_RETRIES) {
3180 retry_cmd = 1;
3181 printk(KERN_WARNING
3182 "cciss%d: retrying %p\n", h->ctlr, cmd);
3183 cmd->retry_count++;
3184 } else
3185 printk(KERN_WARNING
3186 "cciss%d: %p retried too "
3187 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3188 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3189 cmd->err_info->CommandStatus, DRIVER_OK,
3190 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3191 break;
3192 case CMD_TIMEOUT:
3193 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3194 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3195 cmd->err_info->CommandStatus, DRIVER_OK,
3196 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3197 break;
3198 default:
3199 printk(KERN_WARNING "cciss: cmd %p returned "
3200 "unknown status %x\n", cmd,
3201 cmd->err_info->CommandStatus);
1a614f50
SC		 3202 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3203 cmd->err_info->CommandStatus, DRIVER_OK,
3204 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3205 }
d38ae168
MMOD		 3206
3207after_error_processing:
3208
1da177e4 3209 /* We need to return this command */
7c832835
BH		 3210 if (retry_cmd) {
3211 resend_cciss_cmd(h, cmd);
1da177e4 3212 return;
7c832835 3213 }
03bbfee5 3214 cmd->rq->completion_data = cmd;
a9925a06 3215 blk_complete_request(cmd->rq);
1da177e4
LT		 3216}
3217
7c832835
BH		 3218/*
3219 * Get a request and submit it to the controller.
1da177e4 3220 */
165125e1 3221static void do_cciss_request(struct request_queue *q)
1da177e4 3222{
7c832835 3223 ctlr_info_t *h = q->queuedata;
1da177e4 3224 CommandList_struct *c;
00988a35
MMOD		 3225 sector_t start_blk;
3226 int seg;
1da177e4
LT		 3227 struct request *creq;
3228 u64bit temp64;
3229 struct scatterlist tmp_sg[MAXSGENTRIES];
3230 drive_info_struct *drv;
3231 int i, dir;
3232
3233 /* We call start_io here in case there is a command waiting on the
3234 * queue that has not been sent.
7c832835 3235 */
1da177e4
LT		 3236 if (blk_queue_plugged(q))
3237 goto startio;
3238
7c832835 3239 queue:
9934c8c0 3240 creq = blk_peek_request(q);
1da177e4
LT		 3241 if (!creq)
3242 goto startio;
3243
089fe1b2 3244 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3245
7c832835 3246 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3247 goto full;
3248
9934c8c0 3249 blk_start_request(creq);
1da177e4
LT		 3250
3251 spin_unlock_irq(q->queue_lock);
3252
3253 c->cmd_type = CMD_RWREQ;
3254 c->rq = creq;
7c832835
BH		 3255
3256 /* fill in the request */
1da177e4 3257 drv = creq->rq_disk->private_data;
7c832835 3258 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3259 /* got command from pool, so use the command block index instead */
3260 /* for direct lookups. */
3261 /* The first 2 bits are reserved for controller error reporting. */
3262 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835 3263 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
39ccf9a6 3264 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
7c832835
BH		 3265 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3266 c->Request.Type.Type = TYPE_CMD; // It is a command.
3267 c->Request.Type.Attribute = ATTR_SIMPLE;
3268 c->Request.Type.Direction =
a52de245 3269 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3270 c->Request.Timeout = 0; // Don't time out
3271 c->Request.CDB[0] =
00988a35 3272 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3273 start_blk = blk_rq_pos(creq);
1da177e4 3274#ifdef CCISS_DEBUG
83096ebf
TH		 3275 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3276 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3277#endif /* CCISS_DEBUG */
1da177e4 3278
45711f1a 3279 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3280 seg = blk_rq_map_sg(q, creq, tmp_sg);
3281
7c832835 3282 /* get the DMA records for the setup */
1da177e4
LT		 3283 if (c->Request.Type.Direction == XFER_READ)
3284 dir = PCI_DMA_FROMDEVICE;
3285 else
3286 dir = PCI_DMA_TODEVICE;
3287
7c832835 3288 for (i = 0; i < seg; i++) {
1da177e4 3289 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3290 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3291 tmp_sg[i].offset,
3292 tmp_sg[i].length, dir);
1da177e4 3293 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3294 c->SG[i].Addr.upper = temp64.val32.upper;
3295 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3296 }
7c832835
BH		 3297 /* track how many SG entries we are using */
3298 if (seg > h->maxSG)
3299 h->maxSG = seg;
1da177e4
LT		 3300
3301#ifdef CCISS_DEBUG
83096ebf
TH		 3302 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3303 blk_rq_sectors(creq), seg);
7c832835 3304#endif /* CCISS_DEBUG */
1da177e4
LT		 3305
3306 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3307 if (likely(blk_fs_request(creq))) {
3308 if(h->cciss_read == CCISS_READ_10) {
3309 c->Request.CDB[1] = 0;
3310 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3311 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3312 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3313 c->Request.CDB[5] = start_blk & 0xff;
3314 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3315 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3316 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3317 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3318 } else {
582539e5
RD		 3319 u32 upper32 = upper_32_bits(start_blk);
3320
03bbfee5
MMOD		 3321 c->Request.CDBLen = 16;
3322 c->Request.CDB[1]= 0;
582539e5
RD		 3323 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3324 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3325 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3326 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3327 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3328 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3329 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3330 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3331 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3332 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3333 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3334 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3335 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3336 }
3337 } else if (blk_pc_request(creq)) {
3338 c->Request.CDBLen = creq->cmd_len;
3339 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3340 } else {
03bbfee5
MMOD		 3341 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3342 BUG();
00988a35 3343 }
1da177e4
LT		 3344
3345 spin_lock_irq(q->queue_lock);
3346
8a3173de 3347 addQ(&h->reqQ, c);
1da177e4 3348 h->Qdepth++;
7c832835
BH		 3349 if (h->Qdepth > h->maxQsinceinit)
3350 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3351
3352 goto queue;
00988a35 3353full:
1da177e4 3354 blk_stop_queue(q);
00988a35 3355startio:
1da177e4
LT		 3356 /* We will already have the driver lock here so not need
3357 * to lock it.
7c832835 3358 */
1da177e4
LT		 3359 start_io(h);
3360}
3361
3da8b713 3362static inline unsigned long get_next_completion(ctlr_info_t *h)
3363{
3da8b713 3364 return h->access.command_completed(h);
3da8b713 3365}
3366
3367static inline int interrupt_pending(ctlr_info_t *h)
3368{
3da8b713 3369 return h->access.intr_pending(h);
3da8b713 3370}
3371
3372static inline long interrupt_not_for_us(ctlr_info_t *h)
3373{
7c832835 3374 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3375 (h->interrupts_enabled == 0)));
3da8b713 3376}
3377
7d12e780 3378static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3379{
3380 ctlr_info_t *h = dev_id;
3381 CommandList_struct *c;
3382 unsigned long flags;
33079b21 3383 __u32 a, a1, a2;
1da177e4 3384
3da8b713 3385 if (interrupt_not_for_us(h))
1da177e4 3386 return IRQ_NONE;
1da177e4
LT		 3387 /*
3388 * If there are completed commands in the completion queue,
3389 * we had better do something about it.
3390 */
3391 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3392 while (interrupt_pending(h)) {
7c832835 3393 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3394 a1 = a;
33079b21
MM		 3395 if ((a & 0x04)) {
3396 a2 = (a >> 3);
f880632f 3397 if (a2 >= h->nr_cmds) {
7c832835
BH		 3398 printk(KERN_WARNING
3399 "cciss: controller cciss%d failed, stopping.\n",
3400 h->ctlr);
33079b21
MM		 3401 fail_all_cmds(h->ctlr);
3402 return IRQ_HANDLED;
3403 }
3404
3405 c = h->cmd_pool + a2;
3406 a = c->busaddr;
3407
3408 } else {
8a3173de
JA		 3409 struct hlist_node *tmp;
3410
7c832835 3411 a &= ~3;
8a3173de
JA		 3412 c = NULL;
3413 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3414 if (c->busaddr == a)
7c832835
BH		 3415 break;
3416 }
33079b21 3417 }
1da177e4
LT		 3418 /*
3419 * If we've found the command, take it off the
3420 * completion Q and free it
3421 */
8a3173de
JA		 3422 if (c && c->busaddr == a) {
3423 removeQ(c);
1da177e4
LT		 3424 if (c->cmd_type == CMD_RWREQ) {
3425 complete_command(h, c, 0);
3426 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3427 complete(c->waiting);
3428 }
3429# ifdef CONFIG_CISS_SCSI_TAPE
3430 else if (c->cmd_type == CMD_SCSI)
3431 complete_scsi_command(c, 0, a1);
3432# endif
3433 continue;
3434 }
3435 }
3436 }
3437
1da177e4
LT		 3438 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3439 return IRQ_HANDLED;
3440}
7c832835 3441
b368c9dd
AP		 3442/**
3443 * add_to_scan_list() - add controller to rescan queue
3444 * @h: Pointer to the controller.
3445 *
3446 * Adds the controller to the rescan queue if not already on the queue.
3447 *
3448 * returns 1 if added to the queue, 0 if skipped (could be on the
3449 * queue already, or the controller could be initializing or shutting
3450 * down).
3451 **/
3452static int add_to_scan_list(struct ctlr_info *h)
3453{
3454 struct ctlr_info *test_h;
3455 int found = 0;
3456 int ret = 0;
3457
3458 if (h->busy_initializing)
3459 return 0;
3460
3461 if (!mutex_trylock(&h->busy_shutting_down))
3462 return 0;
3463
3464 mutex_lock(&scan_mutex);
3465 list_for_each_entry(test_h, &scan_q, scan_list) {
3466 if (test_h == h) {
3467 found = 1;
3468 break;
3469 }
3470 }
3471 if (!found && !h->busy_scanning) {
3472 INIT_COMPLETION(h->scan_wait);
3473 list_add_tail(&h->scan_list, &scan_q);
3474 ret = 1;
3475 }
3476 mutex_unlock(&scan_mutex);
3477 mutex_unlock(&h->busy_shutting_down);
3478
3479 return ret;
3480}
3481
3482/**
3483 * remove_from_scan_list() - remove controller from rescan queue
3484 * @h: Pointer to the controller.
3485 *
3486 * Removes the controller from the rescan queue if present. Blocks if
fd8489cf
SC		 3487 * the controller is currently conducting a rescan. The controller
3488 * can be in one of three states:
3489 * 1. Doesn't need a scan
3490 * 2. On the scan list, but not scanning yet (we remove it)
3491 * 3. Busy scanning (and not on the list). In this case we want to wait for
3492 * the scan to complete to make sure the scanning thread for this
3493 * controller is completely idle.
b368c9dd
AP		 3494 **/
3495static void remove_from_scan_list(struct ctlr_info *h)
3496{
3497 struct ctlr_info *test_h, *tmp_h;
b368c9dd
AP		 3498
3499 mutex_lock(&scan_mutex);
3500 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
fd8489cf 3501 if (test_h == h) { /* state 2. */
b368c9dd
AP		 3502 list_del(&h->scan_list);
3503 complete_all(&h->scan_wait);
3504 mutex_unlock(&scan_mutex);
3505 return;
3506 }
3507 }
fd8489cf
SC		 3508 if (h->busy_scanning) { /* state 3. */
3509 mutex_unlock(&scan_mutex);
b368c9dd 3510 wait_for_completion(&h->scan_wait);
fd8489cf
SC		 3511 } else { /* state 1, nothing to do. */
3512 mutex_unlock(&scan_mutex);
3513 }
b368c9dd
AP		 3514}
3515
3516/**
3517 * scan_thread() - kernel thread used to rescan controllers
3518 * @data: Ignored.
3519 *
3520 * A kernel thread used scan for drive topology changes on
3521 * controllers. The thread processes only one controller at a time
3522 * using a queue. Controllers are added to the queue using
3523 * add_to_scan_list() and removed from the queue either after done
3524 * processing or using remove_from_scan_list().
3525 *
3526 * returns 0.
3527 **/
0a9279cc
MM		 3528static int scan_thread(void *data)
3529{
b368c9dd 3530 struct ctlr_info *h;
0a9279cc 3531
b368c9dd
AP		 3532 while (1) {
3533 set_current_state(TASK_INTERRUPTIBLE);
3534 schedule();
0a9279cc
MM		 3535 if (kthread_should_stop())
3536 break;
b368c9dd
AP		 3537
3538 while (1) {
3539 mutex_lock(&scan_mutex);
3540 if (list_empty(&scan_q)) {
3541 mutex_unlock(&scan_mutex);
3542 break;
3543 }
3544
3545 h = list_entry(scan_q.next,
3546 struct ctlr_info,
3547 scan_list);
3548 list_del(&h->scan_list);
3549 h->busy_scanning = 1;
3550 mutex_unlock(&scan_mutex);
3551
3552 if (h) {
2d11d993 3553 rebuild_lun_table(h, 0, 0);
b368c9dd
AP		 3554 complete_all(&h->scan_wait);
3555 mutex_lock(&scan_mutex);
3556 h->busy_scanning = 0;
3557 mutex_unlock(&scan_mutex);
3558 }
3559 }
0a9279cc 3560 }
b368c9dd 3561
0a9279cc
MM		 3562 return 0;
3563}
3564
3565static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3566{
3567 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3568 return 0;
3569
3570 switch (c->err_info->SenseInfo[12]) {
3571 case STATE_CHANGED:
3572 printk(KERN_WARNING "cciss%d: a state change "
3573 "detected, command retried\n", h->ctlr);
3574 return 1;
3575 break;
3576 case LUN_FAILED:
3577 printk(KERN_WARNING "cciss%d: LUN failure "
3578 "detected, action required\n", h->ctlr);
3579 return 1;
3580 break;
3581 case REPORT_LUNS_CHANGED:
3582 printk(KERN_WARNING "cciss%d: report LUN data "
3583 "changed\n", h->ctlr);
b368c9dd
AP		 3584 add_to_scan_list(h);
3585 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3586 return 1;
3587 break;
3588 case POWER_OR_RESET:
3589 printk(KERN_WARNING "cciss%d: a power on "
3590 "or device reset detected\n", h->ctlr);
3591 return 1;
3592 break;
3593 case UNIT_ATTENTION_CLEARED:
3594 printk(KERN_WARNING "cciss%d: unit attention "
3595 "cleared by another initiator\n", h->ctlr);
3596 return 1;
3597 break;
3598 default:
3599 printk(KERN_WARNING "cciss%d: unknown "
3600 "unit attention detected\n", h->ctlr);
3601 return 1;
3602 }
3603}
3604
7c832835 3605/*
d14c4ab5 3606 * We cannot read the structure directly, for portability we must use
1da177e4 3607 * the io functions.
7c832835 3608 * This is for debug only.
1da177e4
LT		 3609 */
3610#ifdef CCISS_DEBUG
7c832835 3611static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3612{
3613 int i;
3614 char temp_name[17];
3615
3616 printk("Controller Configuration information\n");
3617 printk("------------------------------------\n");
7c832835 3618 for (i = 0; i < 4; i++)
1da177e4 3619 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3620 temp_name[4] = '\0';
3621 printk(" Signature = %s\n", temp_name);
1da177e4 3622 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3623 printk(" Transport methods supported = 0x%x\n",
3624 readl(&(tb->TransportSupport)));
3625 printk(" Transport methods active = 0x%x\n",
3626 readl(&(tb->TransportActive)));
3627 printk(" Requested transport Method = 0x%x\n",
3628 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3629 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3630 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3631 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3632 readl(&(tb->HostWrite.CoalIntCount)));
3633 printk(" Max outstanding commands = 0x%d\n",
3634 readl(&(tb->CmdsOutMax)));
3635 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3636 for (i = 0; i < 16; i++)
1da177e4
LT		 3637 temp_name[i] = readb(&(tb->ServerName[i]));
3638 temp_name[16] = '\0';
3639 printk(" Server Name = %s\n", temp_name);
7c832835 3640 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3641}
7c832835 3642#endif /* CCISS_DEBUG */
1da177e4 3643
7c832835 3644static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3645{
3646 int i, offset, mem_type, bar_type;
7c832835 3647 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3648 return 0;
3649 offset = 0;
7c832835
BH		 3650 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3651 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3652 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3653 offset += 4;
3654 else {
3655 mem_type = pci_resource_flags(pdev, i) &
7c832835 3656 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3657 switch (mem_type) {
7c832835
BH		 3658 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3659 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3660 offset += 4; /* 32 bit */
3661 break;
3662 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3663 offset += 8;
3664 break;
3665 default: /* reserved in PCI 2.2 */
3666 printk(KERN_WARNING
3667 "Base address is invalid\n");
3668 return -1;
1da177e4
LT		 3669 break;
3670 }
3671 }
7c832835
BH		 3672 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3673 return i + 1;
1da177e4
LT		 3674 }
3675 return -1;
3676}
3677
fb86a35b
MM		 3678/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3679 * controllers that are capable. If not, we use IO-APIC mode.
3680 */
3681
7c832835
BH		 3682static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3683 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3684{
3685#ifdef CONFIG_PCI_MSI
7c832835
BH		 3686 int err;
3687 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3688 {0, 2}, {0, 3}
3689 };
fb86a35b
MM		 3690
3691 /* Some boards advertise MSI but don't really support it */
3692 if ((board_id == 0x40700E11) ||
7c832835
BH		 3693 (board_id == 0x40800E11) ||
3694 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3695 goto default_int_mode;
3696
7c832835
BH		 3697 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3698 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3699 if (!err) {
3700 c->intr[0] = cciss_msix_entries[0].vector;
3701 c->intr[1] = cciss_msix_entries[1].vector;
3702 c->intr[2] = cciss_msix_entries[2].vector;
3703 c->intr[3] = cciss_msix_entries[3].vector;
3704 c->msix_vector = 1;
3705 return;
3706 }
3707 if (err > 0) {
3708 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3709 "available\n", err);
1ecb9c0f 3710 goto default_int_mode;
7c832835
BH		 3711 } else {
3712 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3713 err);
1ecb9c0f 3714 goto default_int_mode;
7c832835
BH		 3715 }
3716 }
3717 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3718 if (!pci_enable_msi(pdev)) {
7c832835 3719 c->msi_vector = 1;
7c832835
BH		 3720 } else {
3721 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3722 }
3723 }
1ecb9c0f 3724default_int_mode:
7c832835 3725#endif /* CONFIG_PCI_MSI */
fb86a35b 3726 /* if we get here we're going to use the default interrupt mode */
7c832835 3727 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3728 return;
3729}
3730
7d1fd970 3731static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3732{
3733 ushort subsystem_vendor_id, subsystem_device_id, command;
3734 __u32 board_id, scratchpad = 0;
3735 __u64 cfg_offset;
3736 __u32 cfg_base_addr;
3737 __u64 cfg_base_addr_index;
2ec24ff1
SC		 3738 int i, prod_index, err;
3739
3740 subsystem_vendor_id = pdev->subsystem_vendor;
3741 subsystem_device_id = pdev->subsystem_device;
3742 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3743 subsystem_vendor_id);
3744
3745 for (i = 0; i < ARRAY_SIZE(products); i++) {
3746 /* Stand aside for hpsa driver on request */
3747 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3748 return -ENODEV;
3749 if (board_id == products[i].board_id)
3750 break;
3751 }
3752 prod_index = i;
3753 if (prod_index == ARRAY_SIZE(products)) {
3754 dev_warn(&pdev->dev,
3755 "unrecognized board ID: 0x%08lx, ignoring.\n",
3756 (unsigned long) board_id);
3757 return -ENODEV;
3758 }
1da177e4
LT		 3759
3760 /* check to see if controller has been disabled */
3761 /* BEFORE trying to enable it */
7c832835
BH		 3762 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3763 if (!(command & 0x02)) {
3764 printk(KERN_WARNING
3765 "cciss: controller appears to be disabled\n");
c33ac89b 3766 return -ENODEV;
1da177e4
LT		 3767 }
3768
c33ac89b 3769 err = pci_enable_device(pdev);
7c832835 3770 if (err) {
1da177e4 3771 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3772 return err;
1da177e4 3773 }
1da177e4 3774
4e570309
BH		 3775 err = pci_request_regions(pdev, "cciss");
3776 if (err) {
3777 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3778 "aborting\n");
872225ca 3779 return err;
4e570309
BH		 3780 }
3781
1da177e4
LT		 3782#ifdef CCISS_DEBUG
3783 printk("command = %x\n", command);
3784 printk("irq = %x\n", pdev->irq);
3785 printk("board_id = %x\n", board_id);
7c832835 3786#endif /* CCISS_DEBUG */
1da177e4 3787
fb86a35b
MM		 3788/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3789 * else we use the IO-APIC interrupt assigned to us by system ROM.
3790 */
3791 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3792
e1438581
MM		 3793 /* find the memory BAR */
3794 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3795 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3796 break;
3797 }
3798 if (i == DEVICE_COUNT_RESOURCE) {
3799 printk(KERN_WARNING "cciss: No memory BAR found\n");
3800 err = -ENODEV;
3801 goto err_out_free_res;
3802 }
3803
3804 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3805 * already removed
3806 */
1da177e4 3807
1da177e4 3808#ifdef CCISS_DEBUG
9f92f471 3809 printk("address 0 = %lx\n", c->paddr);
7c832835 3810#endif /* CCISS_DEBUG */
a5b92873 3811 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3812
3813 /* Wait for the board to become ready. (PCI hotplug needs this.)
3814 * We poll for up to 120 secs, once per 100ms. */
7c832835 3815 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3816 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3817 if (scratchpad == CCISS_FIRMWARE_READY)
3818 break;
3819 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3820 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3821 }
3822 if (scratchpad != CCISS_FIRMWARE_READY) {
3823 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3824 err = -ENODEV;
4e570309 3825 goto err_out_free_res;
1da177e4
LT		 3826 }
3827
3828 /* get the address index number */
3829 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3830 cfg_base_addr &= (__u32) 0x0000ffff;
3831#ifdef CCISS_DEBUG
3832 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3833#endif /* CCISS_DEBUG */
3834 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3835#ifdef CCISS_DEBUG
9f92f471
RD		 3836 printk("cfg base address index = %llx\n",
3837 (unsigned long long)cfg_base_addr_index);
7c832835 3838#endif /* CCISS_DEBUG */
1da177e4
LT		 3839 if (cfg_base_addr_index == -1) {
3840 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3841 err = -ENODEV;
4e570309 3842 goto err_out_free_res;
1da177e4
LT		 3843 }
3844
3845 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3846#ifdef CCISS_DEBUG
9f92f471 3847 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3848#endif /* CCISS_DEBUG */
3849 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3850 cfg_base_addr_index) +
3851 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3852 c->board_id = board_id;
3853
3854#ifdef CCISS_DEBUG
945f390f 3855 print_cfg_table(c->cfgtable);
7c832835 3856#endif /* CCISS_DEBUG */
1da177e4 3857
49153998
MM		 3858 /* Some controllers support Zero Memory Raid (ZMR).
3859 * When configured in ZMR mode the number of supported
3860 * commands drops to 64. So instead of just setting an
3861 * arbitrary value we make the driver a little smarter.
3862 * We read the config table to tell us how many commands
3863 * are supported on the controller then subtract 4 to
3864 * leave a little room for ioctl calls.
3865 */
3866 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
2ec24ff1
SC		 3867 c->product_name = products[prod_index].product_name;
3868 c->access = *(products[prod_index].access);
3869 c->nr_cmds = c->max_commands - 4;
7c832835
BH		 3870 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3871 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3872 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3873 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3874 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3875 err = -ENODEV;
4e570309 3876 goto err_out_free_res;
1da177e4 3877 }
1da177e4 3878#ifdef CONFIG_X86
7c832835
BH		 3879 {
3880 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3881 __u32 prefetch;
3882 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3883 prefetch |= 0x100;
3884 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3885 }
1da177e4
LT		 3886#endif
3887
8bf50f71
MMOD		 3888 /* Disabling DMA prefetch and refetch for the P600.
3889 * An ASIC bug may result in accesses to invalid memory addresses.
3890 * We've disabled prefetch for some time now. Testing with XEN
3891 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3892 */
3893 if(board_id == 0x3225103C) {
3894 __u32 dma_prefetch;
8bf50f71 3895 __u32 dma_refetch;
f92e2f5f
MM		 3896 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3897 dma_prefetch |= 0x8000;
3898 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3899 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3900 dma_refetch |= 0x1;
3901 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3902 }
3903
1da177e4
LT		 3904#ifdef CCISS_DEBUG
3905 printk("Trying to put board into Simple mode\n");
7c832835 3906#endif /* CCISS_DEBUG */
1da177e4 3907 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3908 /* Update the field, and then ring the doorbell */
3909 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3910 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3911
3912 /* under certain very rare conditions, this can take awhile.
3913 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3914 * as we enter this code.) */
7c832835 3915 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3916 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3917 break;
3918 /* delay and try again */
3919 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3920 schedule_timeout(msecs_to_jiffies(1));
7c832835 3921 }
1da177e4
LT		 3922
3923#ifdef CCISS_DEBUG
7c832835
BH		 3924 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3925 readl(c->vaddr + SA5_DOORBELL));
3926#endif /* CCISS_DEBUG */
1da177e4 3927#ifdef CCISS_DEBUG
7c832835
BH		 3928 print_cfg_table(c->cfgtable);
3929#endif /* CCISS_DEBUG */
1da177e4 3930
7c832835 3931 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3932 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3933 " simple mode\n");
c33ac89b 3934 err = -ENODEV;
4e570309 3935 goto err_out_free_res;
1da177e4
LT		 3936 }
3937 return 0;
3938
5faad620 3939err_out_free_res:
872225ca
MM		 3940 /*
3941 * Deliberately omit pci_disable_device(): it does something nasty to
3942 * Smart Array controllers that pci_enable_device does not undo
3943 */
4e570309 3944 pci_release_regions(pdev);
c33ac89b 3945 return err;
1da177e4
LT		 3946}
3947
6ae5ce8e
MM		 3948/* Function to find the first free pointer into our hba[] array
3949 * Returns -1 if no free entries are left.
7c832835 3950 */
1da177e4
LT		 3951static int alloc_cciss_hba(void)
3952{
799202cb 3953 int i;
1da177e4 3954
7c832835 3955 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3956 if (!hba[i]) {
3957 ctlr_info_t *p;
f2912a12 3958
06ff37ff 3959 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3960 if (!p)
3961 goto Enomem;
1da177e4
LT		 3962 hba[i] = p;
3963 return i;
3964 }
3965 }
3966 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3967 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3968 return -1;
3969Enomem:
1da177e4 3970 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3971 return -1;
3972}
3973
2c935593 3974static void free_hba(int n)
1da177e4 3975{
2c935593
SC		 3976 ctlr_info_t *h = hba[n];
3977 int i;
1da177e4 3978
2c935593
SC		 3979 hba[n] = NULL;
3980 for (i = 0; i < h->highest_lun + 1; i++)
3981 if (h->gendisk[i] != NULL)
3982 put_disk(h->gendisk[i]);
3983 kfree(h);
1da177e4
LT		 3984}
3985
82eb03cf
CC		 3986/* Send a message CDB to the firmware. */
3987static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3988{
3989 typedef struct {
3990 CommandListHeader_struct CommandHeader;
3991 RequestBlock_struct Request;
3992 ErrDescriptor_struct ErrorDescriptor;
3993 } Command;
3994 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3995 Command *cmd;
3996 dma_addr_t paddr64;
3997 uint32_t paddr32, tag;
3998 void __iomem *vaddr;
3999 int i, err;
4000
4001 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4002 if (vaddr == NULL)
4003 return -ENOMEM;
4004
4005 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4006 CCISS commands, so they must be allocated from the lower 4GiB of
4007 memory. */
e930438c 4008 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 4009 if (err) {
4010 iounmap(vaddr);
4011 return -ENOMEM;
4012 }
4013
4014 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4015 if (cmd == NULL) {
4016 iounmap(vaddr);
4017 return -ENOMEM;
4018 }
4019
4020 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4021 although there's no guarantee, we assume that the address is at
4022 least 4-byte aligned (most likely, it's page-aligned). */
4023 paddr32 = paddr64;
4024
4025 cmd->CommandHeader.ReplyQueue = 0;
4026 cmd->CommandHeader.SGList = 0;
4027 cmd->CommandHeader.SGTotal = 0;
4028 cmd->CommandHeader.Tag.lower = paddr32;
4029 cmd->CommandHeader.Tag.upper = 0;
4030 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4031
4032 cmd->Request.CDBLen = 16;
4033 cmd->Request.Type.Type = TYPE_MSG;
4034 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4035 cmd->Request.Type.Direction = XFER_NONE;
4036 cmd->Request.Timeout = 0; /* Don't time out */
4037 cmd->Request.CDB[0] = opcode;
4038 cmd->Request.CDB[1] = type;
4039 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4040
4041 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4042 cmd->ErrorDescriptor.Addr.upper = 0;
4043 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4044
4045 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4046
4047 for (i = 0; i < 10; i++) {
4048 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4049 if ((tag & ~3) == paddr32)
4050 break;
4051 schedule_timeout_uninterruptible(HZ);
4052 }
4053
4054 iounmap(vaddr);
4055
4056 /* we leak the DMA buffer here ... no choice since the controller could
4057 still complete the command. */
4058 if (i == 10) {
4059 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
4060 opcode, type);
4061 return -ETIMEDOUT;
4062 }
4063
4064 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4065
4066 if (tag & 2) {
4067 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
4068 opcode, type);
4069 return -EIO;
4070 }
4071
4072 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4073 opcode, type);
4074 return 0;
4075}
4076
4077#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4078#define cciss_noop(p) cciss_message(p, 3, 0)
4079
4080static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4081{
4082/* the #defines are stolen from drivers/pci/msi.h. */
4083#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4084#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4085
4086 int pos;
4087 u16 control = 0;
4088
4089 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4090 if (pos) {
4091 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4092 if (control & PCI_MSI_FLAGS_ENABLE) {
4093 printk(KERN_INFO "cciss: resetting MSI\n");
4094 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4095 }
4096 }
4097
4098 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4099 if (pos) {
4100 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4101 if (control & PCI_MSIX_FLAGS_ENABLE) {
4102 printk(KERN_INFO "cciss: resetting MSI-X\n");
4103 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4104 }
4105 }
4106
4107 return 0;
4108}
4109
4110/* This does a hard reset of the controller using PCI power management
4111 * states. */
4112static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4113{
4114 u16 pmcsr, saved_config_space[32];
4115 int i, pos;
4116
4117 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4118
4119 /* This is very nearly the same thing as
4120
4121 pci_save_state(pci_dev);
4122 pci_set_power_state(pci_dev, PCI_D3hot);
4123 pci_set_power_state(pci_dev, PCI_D0);
4124 pci_restore_state(pci_dev);
4125
4126 but we can't use these nice canned kernel routines on
4127 kexec, because they also check the MSI/MSI-X state in PCI
4128 configuration space and do the wrong thing when it is
4129 set/cleared. Also, the pci_save/restore_state functions
4130 violate the ordering requirements for restoring the
4131 configuration space from the CCISS document (see the
4132 comment below). So we roll our own .... */
4133
4134 for (i = 0; i < 32; i++)
4135 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4136
4137 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4138 if (pos == 0) {
4139 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4140 return -ENODEV;
4141 }
4142
4143 /* Quoting from the Open CISS Specification: "The Power
4144 * Management Control/Status Register (CSR) controls the power
4145 * state of the device. The normal operating state is D0,
4146 * CSR=00h. The software off state is D3, CSR=03h. To reset
4147 * the controller, place the interface device in D3 then to
4148 * D0, this causes a secondary PCI reset which will reset the
4149 * controller." */
4150
4151 /* enter the D3hot power management state */
4152 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4153 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4154 pmcsr |= PCI_D3hot;
4155 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4156
4157 schedule_timeout_uninterruptible(HZ >> 1);
4158
4159 /* enter the D0 power management state */
4160 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4161 pmcsr |= PCI_D0;
4162 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4163
4164 schedule_timeout_uninterruptible(HZ >> 1);
4165
4166 /* Restore the PCI configuration space. The Open CISS
4167 * Specification says, "Restore the PCI Configuration
4168 * Registers, offsets 00h through 60h. It is important to
4169 * restore the command register, 16-bits at offset 04h,
4170 * last. Do not restore the configuration status register,
4171 * 16-bits at offset 06h." Note that the offset is 2*i. */
4172 for (i = 0; i < 32; i++) {
4173 if (i == 2 || i == 3)
4174 continue;
4175 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4176 }
4177 wmb();
4178 pci_write_config_word(pdev, 4, saved_config_space[2]);
4179
4180 return 0;
4181}
4182
1da177e4
LT		 4183/*
4184 * This is it. Find all the controllers and register them. I really hate
4185 * stealing all these major device numbers.
4186 * returns the number of block devices registered.
4187 */
4188static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4189 const struct pci_device_id *ent)
1da177e4 4190{
1da177e4 4191 int i;
799202cb 4192 int j = 0;
1da177e4 4193 int rc;
22bece00 4194 int dac, return_code;
212a5026 4195 InquiryData_struct *inq_buff;
1da177e4 4196
82eb03cf
CC		 4197 if (reset_devices) {
4198 /* Reset the controller with a PCI power-cycle */
4199 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4200 return -ENODEV;
4201
5e18cfd0
JA		 4202 /* Now try to get the controller to respond to a no-op. Some
4203 devices (notably the HP Smart Array 5i Controller) need
4204 up to 30 seconds to respond. */
5e4c91c8 4205 for (i=0; i<30; i++) {
82eb03cf
CC		 4206 if (cciss_noop(pdev) == 0)
4207 break;
5e4c91c8
JA		 4208
4209 schedule_timeout_uninterruptible(HZ);
4210 }
4211 if (i == 30) {
4212 printk(KERN_ERR "cciss: controller seems dead\n");
4213 return -EBUSY;
82eb03cf
CC		 4214 }
4215 }
4216
1da177e4 4217 i = alloc_cciss_hba();
7c832835 4218 if (i < 0)
e2019b58 4219 return -1;
1f8ef380
MM		 4220
4221 hba[i]->busy_initializing = 1;
8a3173de
JA		 4222 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4223 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4224 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4225
1da177e4 4226 if (cciss_pci_init(hba[i], pdev) != 0)
2cfa948c 4227 goto clean_no_release_regions;
1da177e4
LT		 4228
4229 sprintf(hba[i]->devname, "cciss%d", i);
4230 hba[i]->ctlr = i;
4231 hba[i]->pdev = pdev;
4232
b368c9dd
AP		 4233 init_completion(&hba[i]->scan_wait);
4234
7fe06326
AP		 4235 if (cciss_create_hba_sysfs_entry(hba[i]))
4236 goto clean0;
4237
1da177e4 4238 /* configure PCI DMA stuff */
6a35528a 4239 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4240 dac = 1;
284901a9 4241 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4242 dac = 0;
1da177e4 4243 else {
40aabb58 4244 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4245 goto clean1;
4246 }
4247
4248 /*
4249 * register with the major number, or get a dynamic major number
4250 * by passing 0 as argument. This is done for greater than
4251 * 8 controller support.
4252 */
4253 if (i < MAX_CTLR_ORIG)
564de74a 4254 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4255 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4256 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4257 printk(KERN_ERR
7c832835
BH		 4258 "cciss: Unable to get major number %d for %s "
4259 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4260 goto clean1;
7c832835 4261 } else {
1da177e4
LT		 4262 if (i >= MAX_CTLR_ORIG)
4263 hba[i]->major = rc;
4264 }
4265
4266 /* make sure the board interrupts are off */
4267 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4268 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4269 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4270 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4271 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4272 goto clean2;
4273 }
40aabb58
BH		 4274
4275 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4276 hba[i]->devname, pdev->device, pci_name(pdev),
4277 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4278
4279 hba[i]->cmd_pool_bits =
061837bc
JL		 4280 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4281 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4282 hba[i]->cmd_pool = (CommandList_struct *)
4283 pci_alloc_consistent(hba[i]->pdev,
f880632f 4284 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4285 &(hba[i]->cmd_pool_dhandle));
4286 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4287 pci_alloc_consistent(hba[i]->pdev,
f880632f 4288 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4289 &(hba[i]->errinfo_pool_dhandle));
4290 if ((hba[i]->cmd_pool_bits == NULL)
4291 || (hba[i]->cmd_pool == NULL)
4292 || (hba[i]->errinfo_pool == NULL)) {
4293 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4294 goto clean4;
4295 }
1da177e4 4296 spin_lock_init(&hba[i]->lock);
1da177e4 4297
7c832835
BH		 4298 /* Initialize the pdev driver private data.
4299 have it point to hba[i]. */
1da177e4 4300 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4301 /* command and error info recs zeroed out before
4302 they are used */
4303 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4304 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4305 * sizeof(unsigned long));
1da177e4 4306
6ae5ce8e
MM		 4307 hba[i]->num_luns = 0;
4308 hba[i]->highest_lun = -1;
4309 for (j = 0; j < CISS_MAX_LUN; j++) {
9cef0d2f 4310 hba[i]->drv[j] = NULL;
6ae5ce8e
MM		 4311 hba[i]->gendisk[j] = NULL;
4312 }
1da177e4
LT		 4313
4314 cciss_scsi_setup(i);
4315
4316 /* Turn the interrupts on so we can service requests */
4317 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4318
22bece00
MM		 4319 /* Get the firmware version */
4320 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4321 if (inq_buff == NULL) {
4322 printk(KERN_ERR "cciss: out of memory\n");
4323 goto clean4;
4324 }
4325
4326 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4327 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4328 if (return_code == IO_OK) {
4329 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4330 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4331 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4332 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4333 } else { /* send command failed */
4334 printk(KERN_WARNING "cciss: unable to determine firmware"
4335 " version of controller\n");
4336 }
212a5026 4337 kfree(inq_buff);
22bece00 4338
1da177e4 4339 cciss_procinit(i);
92c4231a
MM		 4340
4341 hba[i]->cciss_max_sectors = 2048;
4342
2d11d993 4343 rebuild_lun_table(hba[i], 1, 0);
d6dbf42e 4344 hba[i]->busy_initializing = 0;
e2019b58 4345 return 1;
1da177e4 4346
6ae5ce8e 4347clean4:
6044ec88 4348 kfree(hba[i]->cmd_pool_bits);
7c832835 4349 if (hba[i]->cmd_pool)
1da177e4 4350 pci_free_consistent(hba[i]->pdev,
f880632f 4351 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4352 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4353 if (hba[i]->errinfo_pool)
1da177e4 4354 pci_free_consistent(hba[i]->pdev,
f880632f 4355 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4356 hba[i]->errinfo_pool,
4357 hba[i]->errinfo_pool_dhandle);
fb86a35b 4358 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4359clean2:
1da177e4 4360 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4361clean1:
7fe06326
AP		 4362 cciss_destroy_hba_sysfs_entry(hba[i]);
4363clean0:
2cfa948c
SC		 4364 pci_release_regions(pdev);
4365clean_no_release_regions:
1f8ef380 4366 hba[i]->busy_initializing = 0;
9cef0d2f 4367
872225ca
MM		 4368 /*
4369 * Deliberately omit pci_disable_device(): it does something nasty to
4370 * Smart Array controllers that pci_enable_device does not undo
4371 */
799202cb 4372 pci_set_drvdata(pdev, NULL);
61808c2b 4373 free_hba(i);
e2019b58 4374 return -1;
1da177e4
LT		 4375}
4376
e9ca75b5 4377static void cciss_shutdown(struct pci_dev *pdev)
1da177e4 4378{
29009a03
SC		 4379 ctlr_info_t *h;
4380 char *flush_buf;
7c832835 4381 int return_code;
1da177e4 4382
29009a03
SC		 4383 h = pci_get_drvdata(pdev);
4384 flush_buf = kzalloc(4, GFP_KERNEL);
4385 if (!flush_buf) {
4386 printk(KERN_WARNING
4387 "cciss:%d cache not flushed, out of memory.\n",
4388 h->ctlr);
e9ca75b5 4389 return;
e9ca75b5 4390 }
29009a03
SC		 4391 /* write all data in the battery backed cache to disk */
4392 memset(flush_buf, 0, 4);
4393 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4394 4, 0, CTLR_LUNID, TYPE_CMD);
4395 kfree(flush_buf);
4396 if (return_code != IO_OK)
4397 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4398 h->ctlr);
4399 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4400 free_irq(h->intr[2], h);
e9ca75b5
GB		 4401}
4402
4403static void __devexit cciss_remove_one(struct pci_dev *pdev)
4404{
4405 ctlr_info_t *tmp_ptr;
4406 int i, j;
4407
7c832835
BH		 4408 if (pci_get_drvdata(pdev) == NULL) {
4409 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4410 return;
4411 }
0a9279cc 4412
1da177e4
LT		 4413 tmp_ptr = pci_get_drvdata(pdev);
4414 i = tmp_ptr->ctlr;
7c832835 4415 if (hba[i] == NULL) {
1da177e4 4416 printk(KERN_ERR "cciss: device appears to "
7c832835 4417 "already be removed \n");
1da177e4
LT		 4418 return;
4419 }
b6550777 4420
b368c9dd 4421 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4422
b368c9dd 4423 remove_from_scan_list(hba[i]);
b6550777
BH		 4424 remove_proc_entry(hba[i]->devname, proc_cciss);
4425 unregister_blkdev(hba[i]->major, hba[i]->devname);
4426
4427 /* remove it from the disk list */
4428 for (j = 0; j < CISS_MAX_LUN; j++) {
4429 struct gendisk *disk = hba[i]->gendisk[j];
4430 if (disk) {
165125e1 4431 struct request_queue *q = disk->queue;
b6550777 4432
097d0264 4433 if (disk->flags & GENHD_FL_UP) {
8ce51966 4434 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4435 del_gendisk(disk);
097d0264 4436 }
b6550777
BH		 4437 if (q)
4438 blk_cleanup_queue(q);
4439 }
4440 }
4441
ba198efb 4442#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4443 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4444#endif
b6550777 4445
e9ca75b5 4446 cciss_shutdown(pdev);
fb86a35b
MM		 4447
4448#ifdef CONFIG_PCI_MSI
7c832835
BH		 4449 if (hba[i]->msix_vector)
4450 pci_disable_msix(hba[i]->pdev);
4451 else if (hba[i]->msi_vector)
4452 pci_disable_msi(hba[i]->pdev);
4453#endif /* CONFIG_PCI_MSI */
fb86a35b 4454
1da177e4 4455 iounmap(hba[i]->vaddr);
1da177e4 4456
f880632f 4457 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4458 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4459 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4460 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4461 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4462 /*
4463 * Deliberately omit pci_disable_device(): it does something nasty to
4464 * Smart Array controllers that pci_enable_device does not undo
4465 */
7c832835 4466 pci_release_regions(pdev);
4e570309 4467 pci_set_drvdata(pdev, NULL);
7fe06326 4468 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4469 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4470 free_hba(i);
7c832835 4471}
1da177e4
LT		 4472
4473static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4474 .name = "cciss",
4475 .probe = cciss_init_one,
4476 .remove = __devexit_p(cciss_remove_one),
4477 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4478 .shutdown = cciss_shutdown,
1da177e4
LT		 4479};
4480
4481/*
4482 * This is it. Register the PCI driver information for the cards we control
7c832835 4483 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4484 */
4485static int __init cciss_init(void)
4486{
7fe06326
AP		 4487 int err;
4488
10cbda97
JA		 4489 /*
4490 * The hardware requires that commands are aligned on a 64-bit
4491 * boundary. Given that we use pci_alloc_consistent() to allocate an
4492 * array of them, the size must be a multiple of 8 bytes.
4493 */
4494 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4495
1da177e4
LT		 4496 printk(KERN_INFO DRIVER_NAME "\n");
4497
7fe06326
AP		 4498 err = bus_register(&cciss_bus_type);
4499 if (err)
4500 return err;
4501
b368c9dd
AP		 4502 /* Start the scan thread */
4503 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4504 if (IS_ERR(cciss_scan_thread)) {
4505 err = PTR_ERR(cciss_scan_thread);
4506 goto err_bus_unregister;
4507 }
4508
1da177e4 4509 /* Register for our PCI devices */
7fe06326
AP		 4510 err = pci_register_driver(&cciss_pci_driver);
4511 if (err)
b368c9dd 4512 goto err_thread_stop;
7fe06326 4513
617e1344 4514 return err;
7fe06326 4515
b368c9dd
AP		 4516err_thread_stop:
4517 kthread_stop(cciss_scan_thread);
4518err_bus_unregister:
7fe06326 4519 bus_unregister(&cciss_bus_type);
b368c9dd 4520
7fe06326 4521 return err;
1da177e4
LT		 4522}
4523
4524static void __exit cciss_cleanup(void)
4525{
4526 int i;
4527
4528 pci_unregister_driver(&cciss_pci_driver);
4529 /* double check that all controller entrys have been removed */
7c832835
BH		 4530 for (i = 0; i < MAX_CTLR; i++) {
4531 if (hba[i] != NULL) {
1da177e4 4532 printk(KERN_WARNING "cciss: had to remove"
7c832835 4533 " controller %d\n", i);
1da177e4
LT		 4534 cciss_remove_one(hba[i]->pdev);
4535 }
4536 }
b368c9dd 4537 kthread_stop(cciss_scan_thread);
928b4d8c 4538 remove_proc_entry("driver/cciss", NULL);
7fe06326 4539 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4540}
4541
33079b21
MM		 4542static void fail_all_cmds(unsigned long ctlr)
4543{
4544 /* If we get here, the board is apparently dead. */
4545 ctlr_info_t *h = hba[ctlr];
4546 CommandList_struct *c;
4547 unsigned long flags;
4548
4549 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4550 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4551
4552 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4553
7c832835 4554 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4555
4556 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4557 while (!hlist_empty(&h->reqQ)) {
4558 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4559 removeQ(c);
33079b21 4560 h->Qdepth--;
8a3173de 4561 addQ(&h->cmpQ, c);
33079b21
MM		 4562 }
4563
4564 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4565 while (!hlist_empty(&h->cmpQ)) {
4566 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4567 removeQ(c);
b59e64d0
HR		 4568 if (c->cmd_type != CMD_MSG_STALE)
4569 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4570 if (c->cmd_type == CMD_RWREQ) {
4571 complete_command(h, c, 0);
4572 } else if (c->cmd_type == CMD_IOCTL_PEND)
4573 complete(c->waiting);
4574#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4575 else if (c->cmd_type == CMD_SCSI)
4576 complete_scsi_command(c, 0, 0);
33079b21
MM		 4577#endif
4578 }
4579 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4580 return;
4581}
4582
1da177e4
LT		 4583module_init(cciss_init);
4584module_exit(cciss_cleanup);
Clone of davem's net-next-2.6 tree