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cciss: factor out core of sendcmd() for a more sane interface
[deliverable/linux.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
29#include <linux/delay.h>
30#include <linux/major.h>
31#include <linux/fs.h>
32#include <linux/bio.h>
33#include <linux/blkpg.h>
34#include <linux/timer.h>
35#include <linux/proc_fs.h>
89b6e743 36#include <linux/seq_file.h>
7c832835 37#include <linux/init.h>
1da177e4
LT		 38#include <linux/hdreg.h>
39#include <linux/spinlock.h>
40#include <linux/compat.h>
2056a782 41#include <linux/blktrace_api.h>
1da177e4
LT		 42#include <asm/uaccess.h>
43#include <asm/io.h>
44
eb0df996 45#include <linux/dma-mapping.h>
1da177e4
LT		 46#include <linux/blkdev.h>
47#include <linux/genhd.h>
48#include <linux/completion.h>
d5d3b736 49#include <scsi/scsi.h>
03bbfee5
MMOD		 50#include <scsi/sg.h>
51#include <scsi/scsi_ioctl.h>
52#include <linux/cdrom.h>
231bc2a2 53#include <linux/scatterlist.h>
0a9279cc 54#include <linux/kthread.h>
1da177e4
LT		 55
56#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 57#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
58#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 59
60/* Embedded module documentation macros - see modules.h */
61MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 62MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 63MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 64 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
65 " Smart Array G2 Series SAS/SATA Controllers");
66MODULE_VERSION("3.6.20");
1da177e4
LT		 67MODULE_LICENSE("GPL");
68
69#include "cciss_cmd.h"
70#include "cciss.h"
71#include <linux/cciss_ioctl.h>
72
73/* define the PCI info for the cards we can control */
74static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 75 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
76 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
84 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
85 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 102 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
103 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 104 {0,}
105};
7c832835 106
1da177e4
LT		 107MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
108
1da177e4
LT		 109/* board_id = Subsystem Device ID & Vendor ID
110 * product = Marketing Name for the board
7c832835 111 * access = Address of the struct of function pointers
1da177e4
LT		 112 */
113static struct board_type products[] = {
49153998
MM		 114 {0x40700E11, "Smart Array 5300", &SA5_access},
115 {0x40800E11, "Smart Array 5i", &SA5B_access},
116 {0x40820E11, "Smart Array 532", &SA5B_access},
117 {0x40830E11, "Smart Array 5312", &SA5B_access},
118 {0x409A0E11, "Smart Array 641", &SA5_access},
119 {0x409B0E11, "Smart Array 642", &SA5_access},
120 {0x409C0E11, "Smart Array 6400", &SA5_access},
121 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
122 {0x40910E11, "Smart Array 6i", &SA5_access},
123 {0x3225103C, "Smart Array P600", &SA5_access},
124 {0x3223103C, "Smart Array P800", &SA5_access},
125 {0x3234103C, "Smart Array P400", &SA5_access},
126 {0x3235103C, "Smart Array P400i", &SA5_access},
127 {0x3211103C, "Smart Array E200i", &SA5_access},
128 {0x3212103C, "Smart Array E200", &SA5_access},
129 {0x3213103C, "Smart Array E200i", &SA5_access},
130 {0x3214103C, "Smart Array E200i", &SA5_access},
131 {0x3215103C, "Smart Array E200i", &SA5_access},
132 {0x3237103C, "Smart Array E500", &SA5_access},
133 {0x323D103C, "Smart Array P700m", &SA5_access},
134 {0x3241103C, "Smart Array P212", &SA5_access},
135 {0x3243103C, "Smart Array P410", &SA5_access},
136 {0x3245103C, "Smart Array P410i", &SA5_access},
137 {0x3247103C, "Smart Array P411", &SA5_access},
138 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 139 {0x324A103C, "Smart Array P712m", &SA5_access},
140 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 141 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 142};
143
d14c4ab5 144/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 145#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 146#define MAX_IOCTL_CONFIG_WAIT 1000
147
148/*define how many times we will try a command because of bus resets */
149#define MAX_CMD_RETRIES 3
150
1da177e4
LT		 151#define MAX_CTLR 32
152
153/* Originally cciss driver only supports 8 major numbers */
154#define MAX_CTLR_ORIG 8
155
1da177e4
LT		 156static ctlr_info_t *hba[MAX_CTLR];
157
165125e1 158static void do_cciss_request(struct request_queue *q);
7d12e780 159static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 160static int cciss_open(struct block_device *bdev, fmode_t mode);
161static int cciss_release(struct gendisk *disk, fmode_t mode);
162static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 163 unsigned int cmd, unsigned long arg);
a885c8c4 164static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 165
1da177e4 166static int cciss_revalidate(struct gendisk *disk);
6ae5ce8e 167static int rebuild_lun_table(ctlr_info_t *h, int first_time);
a0ea8622 168static int deregister_disk(ctlr_info_t *h, int drv_index,
7c832835 169 int clear_all);
1da177e4 170
00988a35
MMOD		 171static void cciss_read_capacity(int ctlr, int logvol, int withirq,
172 sector_t *total_size, unsigned int *block_size);
173static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
174 sector_t *total_size, unsigned int *block_size);
175static void cciss_geometry_inquiry(int ctlr, int logvol,
176 int withirq, sector_t total_size,
177 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 178 drive_info_struct *drv);
7c832835
BH		 179static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
180 __u32);
181static void start_io(ctlr_info_t *h);
182static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
183 unsigned int use_unit_num, unsigned int log_unit,
184 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
185static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
186 unsigned int use_unit_num, unsigned int log_unit,
187 __u8 page_code, int cmd_type);
1da177e4 188
33079b21 189static void fail_all_cmds(unsigned long ctlr);
0a9279cc
MM		 190static int scan_thread(void *data);
191static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
33079b21 192
1da177e4 193#ifdef CONFIG_PROC_FS
1da177e4
LT		 194static void cciss_procinit(int i);
195#else
7c832835
BH		 196static void cciss_procinit(int i)
197{
198}
199#endif /* CONFIG_PROC_FS */
1da177e4
LT		 200
201#ifdef CONFIG_COMPAT
ef7822c2
AV		 202static int cciss_compat_ioctl(struct block_device *, fmode_t,
203 unsigned, unsigned long);
1da177e4
LT		 204#endif
205
7c832835
BH		 206static struct block_device_operations cciss_fops = {
207 .owner = THIS_MODULE,
ef7822c2
AV		 208 .open = cciss_open,
209 .release = cciss_release,
210 .locked_ioctl = cciss_ioctl,
7c832835 211 .getgeo = cciss_getgeo,
1da177e4 212#ifdef CONFIG_COMPAT
ef7822c2 213 .compat_ioctl = cciss_compat_ioctl,
1da177e4 214#endif
7c832835 215 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 216};
217
218/*
219 * Enqueuing and dequeuing functions for cmdlists.
220 */
8a3173de 221static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 222{
8a3173de 223 hlist_add_head(&c->list, list);
1da177e4
LT		 224}
225
8a3173de 226static inline void removeQ(CommandList_struct *c)
1da177e4 227{
8a3173de
JA		 228 if (WARN_ON(hlist_unhashed(&c->list)))
229 return;
230
231 hlist_del_init(&c->list);
1da177e4
LT		 232}
233
234#include "cciss_scsi.c" /* For SCSI tape support */
235
0f5486ec
RD		 236#define RAID_UNKNOWN 6
237
1da177e4
LT		 238#ifdef CONFIG_PROC_FS
239
240/*
241 * Report information about this controller.
242 */
243#define ENG_GIG 1000000000
244#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 245#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 246static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
247 "UNKNOWN"
248};
1da177e4
LT		 249
250static struct proc_dir_entry *proc_cciss;
251
89b6e743 252static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 253{
89b6e743
MM		 254 ctlr_info_t *h = seq->private;
255
256 seq_printf(seq, "%s: HP %s Controller\n"
257 "Board ID: 0x%08lx\n"
258 "Firmware Version: %c%c%c%c\n"
259 "IRQ: %d\n"
260 "Logical drives: %d\n"
261 "Current Q depth: %d\n"
262 "Current # commands on controller: %d\n"
263 "Max Q depth since init: %d\n"
264 "Max # commands on controller since init: %d\n"
265 "Max SG entries since init: %d\n",
266 h->devname,
267 h->product_name,
268 (unsigned long)h->board_id,
269 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
270 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
271 h->num_luns,
272 h->Qdepth, h->commands_outstanding,
273 h->maxQsinceinit, h->max_outstanding, h->maxSG);
274
275#ifdef CONFIG_CISS_SCSI_TAPE
276 cciss_seq_tape_report(seq, h->ctlr);
277#endif /* CONFIG_CISS_SCSI_TAPE */
278}
1da177e4 279
89b6e743
MM		 280static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
281{
282 ctlr_info_t *h = seq->private;
283 unsigned ctlr = h->ctlr;
284 unsigned long flags;
1da177e4
LT		 285
286 /* prevent displaying bogus info during configuration
287 * or deconfiguration of a logical volume
288 */
289 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
290 if (h->busy_configuring) {
291 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 292 return ERR_PTR(-EBUSY);
1da177e4
LT		 293 }
294 h->busy_configuring = 1;
295 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
296
89b6e743
MM		 297 if (*pos == 0)
298 cciss_seq_show_header(seq);
299
300 return pos;
301}
302
303static int cciss_seq_show(struct seq_file *seq, void *v)
304{
305 sector_t vol_sz, vol_sz_frac;
306 ctlr_info_t *h = seq->private;
307 unsigned ctlr = h->ctlr;
308 loff_t *pos = v;
309 drive_info_struct *drv = &h->drv[*pos];
310
311 if (*pos > h->highest_lun)
312 return 0;
313
314 if (drv->heads == 0)
315 return 0;
316
317 vol_sz = drv->nr_blocks;
318 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
319 vol_sz_frac *= 100;
320 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
321
322 if (drv->raid_level > 5)
323 drv->raid_level = RAID_UNKNOWN;
324 seq_printf(seq, "cciss/c%dd%d:"
325 "\t%4u.%02uGB\tRAID %s\n",
326 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
327 raid_label[drv->raid_level]);
328 return 0;
329}
330
331static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
332{
333 ctlr_info_t *h = seq->private;
334
335 if (*pos > h->highest_lun)
336 return NULL;
337 *pos += 1;
338
339 return pos;
340}
341
342static void cciss_seq_stop(struct seq_file *seq, void *v)
343{
344 ctlr_info_t *h = seq->private;
345
346 /* Only reset h->busy_configuring if we succeeded in setting
347 * it during cciss_seq_start. */
348 if (v == ERR_PTR(-EBUSY))
349 return;
7c832835 350
1da177e4 351 h->busy_configuring = 0;
1da177e4
LT		 352}
353
89b6e743
MM		 354static struct seq_operations cciss_seq_ops = {
355 .start = cciss_seq_start,
356 .show = cciss_seq_show,
357 .next = cciss_seq_next,
358 .stop = cciss_seq_stop,
359};
360
361static int cciss_seq_open(struct inode *inode, struct file *file)
362{
363 int ret = seq_open(file, &cciss_seq_ops);
364 struct seq_file *seq = file->private_data;
365
366 if (!ret)
367 seq->private = PDE(inode)->data;
368
369 return ret;
370}
371
372static ssize_t
373cciss_proc_write(struct file *file, const char __user *buf,
374 size_t length, loff_t *ppos)
1da177e4 375{
89b6e743
MM		 376 int err;
377 char *buffer;
378
379#ifndef CONFIG_CISS_SCSI_TAPE
380 return -EINVAL;
1da177e4
LT		 381#endif
382
89b6e743 383 if (!buf || length > PAGE_SIZE - 1)
7c832835 384 return -EINVAL;
89b6e743
MM		 385
386 buffer = (char *)__get_free_page(GFP_KERNEL);
387 if (!buffer)
388 return -ENOMEM;
389
390 err = -EFAULT;
391 if (copy_from_user(buffer, buf, length))
392 goto out;
393 buffer[length] = '\0';
394
395#ifdef CONFIG_CISS_SCSI_TAPE
396 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
397 struct seq_file *seq = file->private_data;
398 ctlr_info_t *h = seq->private;
399 int rc;
400
7c832835
BH		 401 rc = cciss_engage_scsi(h->ctlr);
402 if (rc != 0)
89b6e743
MM		 403 err = -rc;
404 else
405 err = length;
406 } else
407#endif /* CONFIG_CISS_SCSI_TAPE */
408 err = -EINVAL;
7c832835
BH		 409 /* might be nice to have "disengage" too, but it's not
410 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 411
412out:
413 free_page((unsigned long)buffer);
414 return err;
1da177e4
LT		 415}
416
89b6e743
MM		 417static struct file_operations cciss_proc_fops = {
418 .owner = THIS_MODULE,
419 .open = cciss_seq_open,
420 .read = seq_read,
421 .llseek = seq_lseek,
422 .release = seq_release,
423 .write = cciss_proc_write,
424};
425
1da177e4
LT		 426static void __devinit cciss_procinit(int i)
427{
428 struct proc_dir_entry *pde;
429
89b6e743 430 if (proc_cciss == NULL)
928b4d8c 431 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 432 if (!proc_cciss)
433 return;
3dfcf9c4 434 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 435 S_IROTH, proc_cciss,
3dfcf9c4 436 &cciss_proc_fops, hba[i]);
1da177e4 437}
7c832835 438#endif /* CONFIG_PROC_FS */
1da177e4 439
7c832835
BH		 440/*
441 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 442 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 443 * which ones are free or in use. For operations that can wait for kmalloc
444 * to possible sleep, this routine can be called with get_from_pool set to 0.
445 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
446 */
447static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 448{
449 CommandList_struct *c;
7c832835 450 int i;
1da177e4
LT		 451 u64bit temp64;
452 dma_addr_t cmd_dma_handle, err_dma_handle;
453
7c832835
BH		 454 if (!get_from_pool) {
455 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
456 sizeof(CommandList_struct), &cmd_dma_handle);
457 if (c == NULL)
458 return NULL;
1da177e4
LT		 459 memset(c, 0, sizeof(CommandList_struct));
460
33079b21
MM		 461 c->cmdindex = -1;
462
7c832835
BH		 463 c->err_info = (ErrorInfo_struct *)
464 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
465 &err_dma_handle);
466
467 if (c->err_info == NULL) {
468 pci_free_consistent(h->pdev,
1da177e4
LT		 469 sizeof(CommandList_struct), c, cmd_dma_handle);
470 return NULL;
471 }
472 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 473 } else { /* get it out of the controllers pool */
474
475 do {
f880632f
MM		 476 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
477 if (i == h->nr_cmds)
7c832835
BH		 478 return NULL;
479 } while (test_and_set_bit
480 (i & (BITS_PER_LONG - 1),
481 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 482#ifdef CCISS_DEBUG
483 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
484#endif
7c832835 485 c = h->cmd_pool + i;
1da177e4 486 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 487 cmd_dma_handle = h->cmd_pool_dhandle
488 + i * sizeof(CommandList_struct);
1da177e4
LT		 489 c->err_info = h->errinfo_pool + i;
490 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 491 err_dma_handle = h->errinfo_pool_dhandle
492 + i * sizeof(ErrorInfo_struct);
493 h->nr_allocs++;
33079b21
MM		 494
495 c->cmdindex = i;
7c832835 496 }
1da177e4 497
8a3173de 498 INIT_HLIST_NODE(&c->list);
1da177e4 499 c->busaddr = (__u32) cmd_dma_handle;
7c832835 500 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 501 c->ErrDesc.Addr.lower = temp64.val32.lower;
502 c->ErrDesc.Addr.upper = temp64.val32.upper;
503 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 504
7c832835
BH		 505 c->ctlr = h->ctlr;
506 return c;
1da177e4
LT		 507}
508
7c832835
BH		 509/*
510 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 511 */
512static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
513{
514 int i;
515 u64bit temp64;
516
7c832835 517 if (!got_from_pool) {
1da177e4
LT		 518 temp64.val32.lower = c->ErrDesc.Addr.lower;
519 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 520 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
521 c->err_info, (dma_addr_t) temp64.val);
522 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
523 c, (dma_addr_t) c->busaddr);
524 } else {
1da177e4 525 i = c - h->cmd_pool;
7c832835
BH		 526 clear_bit(i & (BITS_PER_LONG - 1),
527 h->cmd_pool_bits + (i / BITS_PER_LONG));
528 h->nr_frees++;
529 }
1da177e4
LT		 530}
531
532static inline ctlr_info_t *get_host(struct gendisk *disk)
533{
7c832835 534 return disk->queue->queuedata;
1da177e4
LT		 535}
536
537static inline drive_info_struct *get_drv(struct gendisk *disk)
538{
539 return disk->private_data;
540}
541
542/*
543 * Open. Make sure the device is really there.
544 */
ef7822c2 545static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 546{
ef7822c2
AV		 547 ctlr_info_t *host = get_host(bdev->bd_disk);
548 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 549
550#ifdef CCISS_DEBUG
ef7822c2 551 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 552#endif /* CCISS_DEBUG */
1da177e4 553
ddd47442
MM		 554 if (host->busy_initializing || drv->busy_configuring)
555 return -EBUSY;
1da177e4
LT		 556 /*
557 * Root is allowed to open raw volume zero even if it's not configured
558 * so array config can still work. Root is also allowed to open any
559 * volume that has a LUN ID, so it can issue IOCTL to reread the
560 * disk information. I don't think I really like this
561 * but I'm already using way to many device nodes to claim another one
562 * for "raw controller".
563 */
7a06f789 564 if (drv->heads == 0) {
ef7822c2 565 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 566 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 567 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 568 return -ENXIO;
1da177e4
LT		 569 /* if it is, make sure we have a LUN ID */
570 } else if (drv->LunID == 0) {
571 return -ENXIO;
572 }
573 }
574 if (!capable(CAP_SYS_ADMIN))
575 return -EPERM;
576 }
577 drv->usage_count++;
578 host->usage_count++;
579 return 0;
580}
7c832835 581
1da177e4
LT		 582/*
583 * Close. Sync first.
584 */
ef7822c2 585static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 586{
ef7822c2
AV		 587 ctlr_info_t *host = get_host(disk);
588 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 589
590#ifdef CCISS_DEBUG
ef7822c2 591 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 592#endif /* CCISS_DEBUG */
1da177e4
LT		 593
594 drv->usage_count--;
595 host->usage_count--;
596 return 0;
597}
598
599#ifdef CONFIG_COMPAT
600
ef7822c2
AV		 601static int do_ioctl(struct block_device *bdev, fmode_t mode,
602 unsigned cmd, unsigned long arg)
1da177e4
LT		 603{
604 int ret;
605 lock_kernel();
ef7822c2 606 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 607 unlock_kernel();
608 return ret;
609}
610
ef7822c2
AV		 611static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
612 unsigned cmd, unsigned long arg);
613static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
614 unsigned cmd, unsigned long arg);
1da177e4 615
ef7822c2
AV		 616static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
617 unsigned cmd, unsigned long arg)
1da177e4
LT		 618{
619 switch (cmd) {
620 case CCISS_GETPCIINFO:
621 case CCISS_GETINTINFO:
622 case CCISS_SETINTINFO:
623 case CCISS_GETNODENAME:
624 case CCISS_SETNODENAME:
625 case CCISS_GETHEARTBEAT:
626 case CCISS_GETBUSTYPES:
627 case CCISS_GETFIRMVER:
628 case CCISS_GETDRIVVER:
629 case CCISS_REVALIDVOLS:
630 case CCISS_DEREGDISK:
631 case CCISS_REGNEWDISK:
632 case CCISS_REGNEWD:
633 case CCISS_RESCANDISK:
634 case CCISS_GETLUNINFO:
ef7822c2 635 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 636
637 case CCISS_PASSTHRU32:
ef7822c2 638 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 639 case CCISS_BIG_PASSTHRU32:
ef7822c2 640 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 641
642 default:
643 return -ENOIOCTLCMD;
644 }
645}
646
ef7822c2
AV		 647static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
648 unsigned cmd, unsigned long arg)
1da177e4
LT		 649{
650 IOCTL32_Command_struct __user *arg32 =
7c832835 651 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 652 IOCTL_Command_struct arg64;
653 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
654 int err;
655 u32 cp;
656
657 err = 0;
7c832835
BH		 658 err |=
659 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
660 sizeof(arg64.LUN_info));
661 err |=
662 copy_from_user(&arg64.Request, &arg32->Request,
663 sizeof(arg64.Request));
664 err |=
665 copy_from_user(&arg64.error_info, &arg32->error_info,
666 sizeof(arg64.error_info));
1da177e4
LT		 667 err |= get_user(arg64.buf_size, &arg32->buf_size);
668 err |= get_user(cp, &arg32->buf);
669 arg64.buf = compat_ptr(cp);
670 err |= copy_to_user(p, &arg64, sizeof(arg64));
671
672 if (err)
673 return -EFAULT;
674
ef7822c2 675 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 676 if (err)
677 return err;
7c832835
BH		 678 err |=
679 copy_in_user(&arg32->error_info, &p->error_info,
680 sizeof(arg32->error_info));
1da177e4
LT		 681 if (err)
682 return -EFAULT;
683 return err;
684}
685
ef7822c2
AV		 686static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
687 unsigned cmd, unsigned long arg)
1da177e4
LT		 688{
689 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 690 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 691 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 692 BIG_IOCTL_Command_struct __user *p =
693 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 694 int err;
695 u32 cp;
696
697 err = 0;
7c832835
BH		 698 err |=
699 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
700 sizeof(arg64.LUN_info));
701 err |=
702 copy_from_user(&arg64.Request, &arg32->Request,
703 sizeof(arg64.Request));
704 err |=
705 copy_from_user(&arg64.error_info, &arg32->error_info,
706 sizeof(arg64.error_info));
1da177e4
LT		 707 err |= get_user(arg64.buf_size, &arg32->buf_size);
708 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
709 err |= get_user(cp, &arg32->buf);
710 arg64.buf = compat_ptr(cp);
711 err |= copy_to_user(p, &arg64, sizeof(arg64));
712
713 if (err)
7c832835 714 return -EFAULT;
1da177e4 715
ef7822c2 716 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 717 if (err)
718 return err;
7c832835
BH		 719 err |=
720 copy_in_user(&arg32->error_info, &p->error_info,
721 sizeof(arg32->error_info));
1da177e4
LT		 722 if (err)
723 return -EFAULT;
724 return err;
725}
726#endif
a885c8c4
CH		 727
728static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
729{
730 drive_info_struct *drv = get_drv(bdev->bd_disk);
731
732 if (!drv->cylinders)
733 return -ENXIO;
734
735 geo->heads = drv->heads;
736 geo->sectors = drv->sectors;
737 geo->cylinders = drv->cylinders;
738 return 0;
739}
740
0a9279cc
MM		 741static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
742{
743 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
744 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
745 (void)check_for_unit_attention(host, c);
746}
1da177e4 747/*
7c832835 748 * ioctl
1da177e4 749 */
ef7822c2 750static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 751 unsigned int cmd, unsigned long arg)
1da177e4 752{
1da177e4
LT		 753 struct gendisk *disk = bdev->bd_disk;
754 ctlr_info_t *host = get_host(disk);
755 drive_info_struct *drv = get_drv(disk);
756 int ctlr = host->ctlr;
757 void __user *argp = (void __user *)arg;
758
759#ifdef CCISS_DEBUG
760 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 761#endif /* CCISS_DEBUG */
762
763 switch (cmd) {
1da177e4 764 case CCISS_GETPCIINFO:
7c832835
BH		 765 {
766 cciss_pci_info_struct pciinfo;
767
768 if (!arg)
769 return -EINVAL;
770 pciinfo.domain = pci_domain_nr(host->pdev->bus);
771 pciinfo.bus = host->pdev->bus->number;
772 pciinfo.dev_fn = host->pdev->devfn;
773 pciinfo.board_id = host->board_id;
774 if (copy_to_user
775 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
776 return -EFAULT;
777 return 0;
778 }
1da177e4 779 case CCISS_GETINTINFO:
7c832835
BH		 780 {
781 cciss_coalint_struct intinfo;
782 if (!arg)
783 return -EINVAL;
784 intinfo.delay =
785 readl(&host->cfgtable->HostWrite.CoalIntDelay);
786 intinfo.count =
787 readl(&host->cfgtable->HostWrite.CoalIntCount);
788 if (copy_to_user
789 (argp, &intinfo, sizeof(cciss_coalint_struct)))
790 return -EFAULT;
791 return 0;
792 }
1da177e4 793 case CCISS_SETINTINFO:
1da177e4 794 {
7c832835
BH		 795 cciss_coalint_struct intinfo;
796 unsigned long flags;
797 int i;
798
799 if (!arg)
800 return -EINVAL;
801 if (!capable(CAP_SYS_ADMIN))
802 return -EPERM;
803 if (copy_from_user
804 (&intinfo, argp, sizeof(cciss_coalint_struct)))
805 return -EFAULT;
806 if ((intinfo.delay == 0) && (intinfo.count == 0))
807 {
808// printk("cciss_ioctl: delay and count cannot be 0\n");
809 return -EINVAL;
810 }
811 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
812 /* Update the field, and then ring the doorbell */
813 writel(intinfo.delay,
814 &(host->cfgtable->HostWrite.CoalIntDelay));
815 writel(intinfo.count,
816 &(host->cfgtable->HostWrite.CoalIntCount));
817 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
818
819 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
820 if (!(readl(host->vaddr + SA5_DOORBELL)
821 & CFGTBL_ChangeReq))
822 break;
823 /* delay and try again */
824 udelay(1000);
825 }
826 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
827 if (i >= MAX_IOCTL_CONFIG_WAIT)
828 return -EAGAIN;
829 return 0;
1da177e4 830 }
1da177e4 831 case CCISS_GETNODENAME:
7c832835
BH		 832 {
833 NodeName_type NodeName;
834 int i;
835
836 if (!arg)
837 return -EINVAL;
838 for (i = 0; i < 16; i++)
839 NodeName[i] =
840 readb(&host->cfgtable->ServerName[i]);
841 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
842 return -EFAULT;
843 return 0;
844 }
1da177e4 845 case CCISS_SETNODENAME:
7c832835
BH		 846 {
847 NodeName_type NodeName;
848 unsigned long flags;
849 int i;
850
851 if (!arg)
852 return -EINVAL;
853 if (!capable(CAP_SYS_ADMIN))
854 return -EPERM;
855
856 if (copy_from_user
857 (NodeName, argp, sizeof(NodeName_type)))
858 return -EFAULT;
859
860 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
861
862 /* Update the field, and then ring the doorbell */
863 for (i = 0; i < 16; i++)
864 writeb(NodeName[i],
865 &host->cfgtable->ServerName[i]);
866
867 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
868
869 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
870 if (!(readl(host->vaddr + SA5_DOORBELL)
871 & CFGTBL_ChangeReq))
872 break;
873 /* delay and try again */
874 udelay(1000);
875 }
876 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
877 if (i >= MAX_IOCTL_CONFIG_WAIT)
878 return -EAGAIN;
879 return 0;
880 }
1da177e4
LT		 881
882 case CCISS_GETHEARTBEAT:
7c832835
BH		 883 {
884 Heartbeat_type heartbeat;
885
886 if (!arg)
887 return -EINVAL;
888 heartbeat = readl(&host->cfgtable->HeartBeat);
889 if (copy_to_user
890 (argp, &heartbeat, sizeof(Heartbeat_type)))
891 return -EFAULT;
892 return 0;
893 }
1da177e4 894 case CCISS_GETBUSTYPES:
7c832835
BH		 895 {
896 BusTypes_type BusTypes;
897
898 if (!arg)
899 return -EINVAL;
900 BusTypes = readl(&host->cfgtable->BusTypes);
901 if (copy_to_user
902 (argp, &BusTypes, sizeof(BusTypes_type)))
903 return -EFAULT;
904 return 0;
905 }
1da177e4 906 case CCISS_GETFIRMVER:
7c832835
BH		 907 {
908 FirmwareVer_type firmware;
1da177e4 909
7c832835
BH		 910 if (!arg)
911 return -EINVAL;
912 memcpy(firmware, host->firm_ver, 4);
1da177e4 913
7c832835
BH		 914 if (copy_to_user
915 (argp, firmware, sizeof(FirmwareVer_type)))
916 return -EFAULT;
917 return 0;
918 }
919 case CCISS_GETDRIVVER:
920 {
921 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 922
7c832835
BH		 923 if (!arg)
924 return -EINVAL;
1da177e4 925
7c832835
BH		 926 if (copy_to_user
927 (argp, &DriverVer, sizeof(DriverVer_type)))
928 return -EFAULT;
929 return 0;
930 }
1da177e4 931
6ae5ce8e
MM		 932 case CCISS_DEREGDISK:
933 case CCISS_REGNEWD:
1da177e4 934 case CCISS_REVALIDVOLS:
6ae5ce8e 935 return rebuild_lun_table(host, 0);
7c832835
BH		 936
937 case CCISS_GETLUNINFO:{
938 LogvolInfo_struct luninfo;
939
940 luninfo.LunID = drv->LunID;
941 luninfo.num_opens = drv->usage_count;
942 luninfo.num_parts = 0;
943 if (copy_to_user(argp, &luninfo,
944 sizeof(LogvolInfo_struct)))
945 return -EFAULT;
946 return 0;
947 }
1da177e4 948 case CCISS_PASSTHRU:
1da177e4 949 {
7c832835
BH		 950 IOCTL_Command_struct iocommand;
951 CommandList_struct *c;
952 char *buff = NULL;
953 u64bit temp64;
954 unsigned long flags;
6e9a4738 955 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 956
7c832835
BH		 957 if (!arg)
958 return -EINVAL;
1da177e4 959
7c832835
BH		 960 if (!capable(CAP_SYS_RAWIO))
961 return -EPERM;
1da177e4 962
7c832835
BH		 963 if (copy_from_user
964 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
965 return -EFAULT;
966 if ((iocommand.buf_size < 1) &&
967 (iocommand.Request.Type.Direction != XFER_NONE)) {
968 return -EINVAL;
969 }
970#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
971 /* Check kmalloc limits */
972 if (iocommand.buf_size > 128000)
973 return -EINVAL;
974#endif
975 if (iocommand.buf_size > 0) {
976 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
977 if (buff == NULL)
978 return -EFAULT;
979 }
980 if (iocommand.Request.Type.Direction == XFER_WRITE) {
981 /* Copy the data into the buffer we created */
982 if (copy_from_user
983 (buff, iocommand.buf, iocommand.buf_size)) {
984 kfree(buff);
985 return -EFAULT;
986 }
987 } else {
988 memset(buff, 0, iocommand.buf_size);
989 }
990 if ((c = cmd_alloc(host, 0)) == NULL) {
991 kfree(buff);
992 return -ENOMEM;
993 }
994 // Fill in the command type
995 c->cmd_type = CMD_IOCTL_PEND;
996 // Fill in Command Header
997 c->Header.ReplyQueue = 0; // unused in simple mode
998 if (iocommand.buf_size > 0) // buffer to fill
999 {
1000 c->Header.SGList = 1;
1001 c->Header.SGTotal = 1;
1002 } else // no buffers to fill
1003 {
1004 c->Header.SGList = 0;
1005 c->Header.SGTotal = 0;
1006 }
1007 c->Header.LUN = iocommand.LUN_info;
1008 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1009
7c832835
BH		 1010 // Fill in Request block
1011 c->Request = iocommand.Request;
1da177e4 1012
7c832835
BH		 1013 // Fill in the scatter gather information
1014 if (iocommand.buf_size > 0) {
1015 temp64.val = pci_map_single(host->pdev, buff,
1016 iocommand.buf_size,
1017 PCI_DMA_BIDIRECTIONAL);
1018 c->SG[0].Addr.lower = temp64.val32.lower;
1019 c->SG[0].Addr.upper = temp64.val32.upper;
1020 c->SG[0].Len = iocommand.buf_size;
1021 c->SG[0].Ext = 0; // we are not chaining
1022 }
1023 c->waiting = &wait;
1024
1025 /* Put the request on the tail of the request queue */
1026 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1027 addQ(&host->reqQ, c);
1028 host->Qdepth++;
1029 start_io(host);
1030 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1031
1032 wait_for_completion(&wait);
1033
1034 /* unlock the buffers from DMA */
1035 temp64.val32.lower = c->SG[0].Addr.lower;
1036 temp64.val32.upper = c->SG[0].Addr.upper;
1037 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1038 iocommand.buf_size,
1039 PCI_DMA_BIDIRECTIONAL);
1040
0a9279cc
MM		 1041 check_ioctl_unit_attention(host, c);
1042
7c832835
BH		 1043 /* Copy the error information out */
1044 iocommand.error_info = *(c->err_info);
1045 if (copy_to_user
1046 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1047 kfree(buff);
1da177e4
LT		 1048 cmd_free(host, c, 0);
1049 return -EFAULT;
1050 }
7c832835
BH		 1051
1052 if (iocommand.Request.Type.Direction == XFER_READ) {
1053 /* Copy the data out of the buffer we created */
1054 if (copy_to_user
1055 (iocommand.buf, buff, iocommand.buf_size)) {
1056 kfree(buff);
1057 cmd_free(host, c, 0);
1058 return -EFAULT;
1059 }
1060 }
1061 kfree(buff);
1062 cmd_free(host, c, 0);
1063 return 0;
1da177e4 1064 }
7c832835
BH		 1065 case CCISS_BIG_PASSTHRU:{
1066 BIG_IOCTL_Command_struct *ioc;
1067 CommandList_struct *c;
1068 unsigned char **buff = NULL;
1069 int *buff_size = NULL;
1070 u64bit temp64;
1071 unsigned long flags;
1072 BYTE sg_used = 0;
1073 int status = 0;
1074 int i;
6e9a4738 1075 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1076 __u32 left;
1077 __u32 sz;
1078 BYTE __user *data_ptr;
1079
1080 if (!arg)
1081 return -EINVAL;
1082 if (!capable(CAP_SYS_RAWIO))
1083 return -EPERM;
1084 ioc = (BIG_IOCTL_Command_struct *)
1085 kmalloc(sizeof(*ioc), GFP_KERNEL);
1086 if (!ioc) {
1087 status = -ENOMEM;
1088 goto cleanup1;
1089 }
1090 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1091 status = -EFAULT;
1092 goto cleanup1;
1093 }
1094 if ((ioc->buf_size < 1) &&
1095 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1096 status = -EINVAL;
1097 goto cleanup1;
7c832835
BH		 1098 }
1099 /* Check kmalloc limits using all SGs */
1100 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1101 status = -EINVAL;
1102 goto cleanup1;
1103 }
1104 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1105 status = -EINVAL;
1106 goto cleanup1;
1107 }
1108 buff =
1109 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1110 if (!buff) {
1da177e4
LT		 1111 status = -ENOMEM;
1112 goto cleanup1;
1113 }
5cbded58 1114 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1115 GFP_KERNEL);
1116 if (!buff_size) {
1117 status = -ENOMEM;
1118 goto cleanup1;
1119 }
1120 left = ioc->buf_size;
1121 data_ptr = ioc->buf;
1122 while (left) {
1123 sz = (left >
1124 ioc->malloc_size) ? ioc->
1125 malloc_size : left;
1126 buff_size[sg_used] = sz;
1127 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1128 if (buff[sg_used] == NULL) {
1da177e4 1129 status = -ENOMEM;
15534d38
JA		 1130 goto cleanup1;
1131 }
7c832835
BH		 1132 if (ioc->Request.Type.Direction == XFER_WRITE) {
1133 if (copy_from_user
1134 (buff[sg_used], data_ptr, sz)) {
f7108f91 1135 status = -EFAULT;
7c832835
BH		 1136 goto cleanup1;
1137 }
1138 } else {
1139 memset(buff[sg_used], 0, sz);
1140 }
1141 left -= sz;
1142 data_ptr += sz;
1143 sg_used++;
1144 }
1145 if ((c = cmd_alloc(host, 0)) == NULL) {
1146 status = -ENOMEM;
1147 goto cleanup1;
1148 }
1149 c->cmd_type = CMD_IOCTL_PEND;
1150 c->Header.ReplyQueue = 0;
1151
1152 if (ioc->buf_size > 0) {
1153 c->Header.SGList = sg_used;
1154 c->Header.SGTotal = sg_used;
1da177e4 1155 } else {
7c832835
BH		 1156 c->Header.SGList = 0;
1157 c->Header.SGTotal = 0;
1da177e4 1158 }
7c832835
BH		 1159 c->Header.LUN = ioc->LUN_info;
1160 c->Header.Tag.lower = c->busaddr;
1161
1162 c->Request = ioc->Request;
1163 if (ioc->buf_size > 0) {
1164 int i;
1165 for (i = 0; i < sg_used; i++) {
1166 temp64.val =
1167 pci_map_single(host->pdev, buff[i],
1168 buff_size[i],
1169 PCI_DMA_BIDIRECTIONAL);
1170 c->SG[i].Addr.lower =
1171 temp64.val32.lower;
1172 c->SG[i].Addr.upper =
1173 temp64.val32.upper;
1174 c->SG[i].Len = buff_size[i];
1175 c->SG[i].Ext = 0; /* we are not chaining */
1176 }
1177 }
1178 c->waiting = &wait;
1179 /* Put the request on the tail of the request queue */
1180 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1181 addQ(&host->reqQ, c);
1182 host->Qdepth++;
1183 start_io(host);
1184 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1185 wait_for_completion(&wait);
1186 /* unlock the buffers from DMA */
1187 for (i = 0; i < sg_used; i++) {
1188 temp64.val32.lower = c->SG[i].Addr.lower;
1189 temp64.val32.upper = c->SG[i].Addr.upper;
1190 pci_unmap_single(host->pdev,
1191 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1192 PCI_DMA_BIDIRECTIONAL);
1da177e4 1193 }
0a9279cc 1194 check_ioctl_unit_attention(host, c);
7c832835
BH		 1195 /* Copy the error information out */
1196 ioc->error_info = *(c->err_info);
1197 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1198 cmd_free(host, c, 0);
1199 status = -EFAULT;
1200 goto cleanup1;
1201 }
1202 if (ioc->Request.Type.Direction == XFER_READ) {
1203 /* Copy the data out of the buffer we created */
1204 BYTE __user *ptr = ioc->buf;
1205 for (i = 0; i < sg_used; i++) {
1206 if (copy_to_user
1207 (ptr, buff[i], buff_size[i])) {
1208 cmd_free(host, c, 0);
1209 status = -EFAULT;
1210 goto cleanup1;
1211 }
1212 ptr += buff_size[i];
1da177e4 1213 }
1da177e4 1214 }
7c832835
BH		 1215 cmd_free(host, c, 0);
1216 status = 0;
1217 cleanup1:
1218 if (buff) {
1219 for (i = 0; i < sg_used; i++)
1220 kfree(buff[i]);
1221 kfree(buff);
1222 }
1223 kfree(buff_size);
1224 kfree(ioc);
1225 return status;
1da177e4 1226 }
03bbfee5
MMOD		 1227
1228 /* scsi_cmd_ioctl handles these, below, though some are not */
1229 /* very meaningful for cciss. SG_IO is the main one people want. */
1230
1231 case SG_GET_VERSION_NUM:
1232 case SG_SET_TIMEOUT:
1233 case SG_GET_TIMEOUT:
1234 case SG_GET_RESERVED_SIZE:
1235 case SG_SET_RESERVED_SIZE:
1236 case SG_EMULATED_HOST:
1237 case SG_IO:
1238 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1239 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1240
1241 /* scsi_cmd_ioctl would normally handle these, below, but */
1242 /* they aren't a good fit for cciss, as CD-ROMs are */
1243 /* not supported, and we don't have any bus/target/lun */
1244 /* which we present to the kernel. */
1245
1246 case CDROM_SEND_PACKET:
1247 case CDROMCLOSETRAY:
1248 case CDROMEJECT:
1249 case SCSI_IOCTL_GET_IDLUN:
1250 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1251 default:
1252 return -ENOTTY;
1253 }
1da177e4
LT		 1254}
1255
7b30f092
JA		 1256static void cciss_check_queues(ctlr_info_t *h)
1257{
1258 int start_queue = h->next_to_run;
1259 int i;
1260
1261 /* check to see if we have maxed out the number of commands that can
1262 * be placed on the queue. If so then exit. We do this check here
1263 * in case the interrupt we serviced was from an ioctl and did not
1264 * free any new commands.
1265 */
f880632f 1266 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1267 return;
1268
1269 /* We have room on the queue for more commands. Now we need to queue
1270 * them up. We will also keep track of the next queue to run so
1271 * that every queue gets a chance to be started first.
1272 */
1273 for (i = 0; i < h->highest_lun + 1; i++) {
1274 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1275 /* make sure the disk has been added and the drive is real
1276 * because this can be called from the middle of init_one.
1277 */
1278 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1279 continue;
1280 blk_start_queue(h->gendisk[curr_queue]->queue);
1281
1282 /* check to see if we have maxed out the number of commands
1283 * that can be placed on the queue.
1284 */
f880632f 1285 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1286 if (curr_queue == start_queue) {
1287 h->next_to_run =
1288 (start_queue + 1) % (h->highest_lun + 1);
1289 break;
1290 } else {
1291 h->next_to_run = curr_queue;
1292 break;
1293 }
7b30f092
JA		 1294 }
1295 }
1296}
1297
ca1e0484
MM		 1298static void cciss_softirq_done(struct request *rq)
1299{
1300 CommandList_struct *cmd = rq->completion_data;
1301 ctlr_info_t *h = hba[cmd->ctlr];
1302 unsigned long flags;
1303 u64bit temp64;
1304 int i, ddir;
1305
1306 if (cmd->Request.Type.Direction == XFER_READ)
1307 ddir = PCI_DMA_FROMDEVICE;
1308 else
1309 ddir = PCI_DMA_TODEVICE;
1310
1311 /* command did not need to be retried */
1312 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1313 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1314 temp64.val32.lower = cmd->SG[i].Addr.lower;
1315 temp64.val32.upper = cmd->SG[i].Addr.upper;
1316 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1317 }
1318
ca1e0484
MM		 1319#ifdef CCISS_DEBUG
1320 printk("Done with %p\n", rq);
7c832835 1321#endif /* CCISS_DEBUG */
ca1e0484 1322
c3a4d78c 1323 /* set the residual count for pc requests */
ac44e5b2 1324 if (blk_pc_request(rq))
c3a4d78c 1325 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1326
c3a4d78c 1327 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1328
ca1e0484 1329 spin_lock_irqsave(&h->lock, flags);
7c832835 1330 cmd_free(h, cmd, 1);
7b30f092 1331 cciss_check_queues(h);
ca1e0484
MM		 1332 spin_unlock_irqrestore(&h->lock, flags);
1333}
1334
a72da29b
MM		 1335/* This function gets the serial number of a logical drive via
1336 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1337 * number cannot be had, for whatever reason, 16 bytes of 0xff
1338 * are returned instead.
1339 */
1340static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1341 unsigned char *serial_no, int buflen)
1342{
1343#define PAGE_83_INQ_BYTES 64
1344 int rc;
1345 unsigned char *buf;
1346
1347 if (buflen > 16)
1348 buflen = 16;
1349 memset(serial_no, 0xff, buflen);
1350 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1351 if (!buf)
1352 return;
1353 memset(serial_no, 0, buflen);
1354 if (withirq)
1355 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1356 PAGE_83_INQ_BYTES, 1, logvol, 0x83, TYPE_CMD);
1357 else
1358 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
1359 PAGE_83_INQ_BYTES, 1, logvol, 0x83, NULL, TYPE_CMD);
1360 if (rc == IO_OK)
1361 memcpy(serial_no, &buf[8], buflen);
1362 kfree(buf);
1363 return;
1364}
1365
6ae5ce8e
MM		 1366static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1367 int drv_index)
1368{
1369 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1370 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1371 disk->major = h->major;
1372 disk->first_minor = drv_index << NWD_SHIFT;
1373 disk->fops = &cciss_fops;
1374 disk->private_data = &h->drv[drv_index];
40444308 1375 disk->driverfs_dev = &h->pdev->dev;
6ae5ce8e
MM		 1376
1377 /* Set up queue information */
1378 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1379
1380 /* This is a hardware imposed limit. */
1381 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1382
1383 /* This is a limit in the driver and could be eliminated. */
1384 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1385
1386 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1387
1388 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1389
1390 disk->queue->queuedata = h;
1391
e1defc4f
MP		 1392 blk_queue_logical_block_size(disk->queue,
1393 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1394
1395 /* Make sure all queue data is written out before */
1396 /* setting h->drv[drv_index].queue, as setting this */
1397 /* allows the interrupt handler to start the queue */
1398 wmb();
1399 h->drv[drv_index].queue = disk->queue;
1400 add_disk(disk);
1401}
1402
ddd47442 1403/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1404 * If the usage_count is zero and it is a heretofore unknown drive, or,
1405 * the drive's capacity, geometry, or serial number has changed,
1406 * then the drive information will be updated and the disk will be
1407 * re-registered with the kernel. If these conditions don't hold,
1408 * then it will be left alone for the next reboot. The exception to this
1409 * is disk 0 which will always be left registered with the kernel since it
1410 * is also the controller node. Any changes to disk 0 will show up on
1411 * the next reboot.
7c832835 1412 */
6ae5ce8e 1413static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
7c832835 1414{
ddd47442
MM		 1415 ctlr_info_t *h = hba[ctlr];
1416 struct gendisk *disk;
ddd47442
MM		 1417 InquiryData_struct *inq_buff = NULL;
1418 unsigned int block_size;
00988a35 1419 sector_t total_size;
ddd47442
MM		 1420 unsigned long flags = 0;
1421 int ret = 0;
a72da29b 1422 drive_info_struct *drvinfo;
6ae5ce8e 1423 int was_only_controller_node;
a72da29b
MM		 1424
1425 /* Get information about the disk and modify the driver structure */
1426 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1427 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1428 if (inq_buff == NULL || drvinfo == NULL)
1429 goto mem_msg;
1430
6ae5ce8e
MM		 1431 /* See if we're trying to update the "controller node"
1432 * this will happen the when the first logical drive gets
1433 * created by ACU.
1434 */
1435 was_only_controller_node = (drv_index == 0 &&
1436 h->drv[0].raid_level == -1);
1437
a72da29b
MM		 1438 /* testing to see if 16-byte CDBs are already being used */
1439 if (h->cciss_read == CCISS_READ_16) {
1440 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1441 &total_size, &block_size);
1442
1443 } else {
1444 cciss_read_capacity(ctlr, drv_index, 1,
1445 &total_size, &block_size);
1446
1447 /* if read_capacity returns all F's this volume is >2TB */
1448 /* in size so we switch to 16-byte CDB's for all */
1449 /* read/write ops */
1450 if (total_size == 0xFFFFFFFFULL) {
1451 cciss_read_capacity_16(ctlr, drv_index, 1,
1452 &total_size, &block_size);
1453 h->cciss_read = CCISS_READ_16;
1454 h->cciss_write = CCISS_WRITE_16;
1455 } else {
1456 h->cciss_read = CCISS_READ_10;
1457 h->cciss_write = CCISS_WRITE_10;
1458 }
1459 }
1460
1461 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1462 inq_buff, drvinfo);
1463 drvinfo->block_size = block_size;
1464 drvinfo->nr_blocks = total_size + 1;
1465
1466 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1467 sizeof(drvinfo->serial_no));
1468
1469 /* Is it the same disk we already know, and nothing's changed? */
1470 if (h->drv[drv_index].raid_level != -1 &&
1471 ((memcmp(drvinfo->serial_no,
1472 h->drv[drv_index].serial_no, 16) == 0) &&
1473 drvinfo->block_size == h->drv[drv_index].block_size &&
1474 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1475 drvinfo->heads == h->drv[drv_index].heads &&
1476 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1477 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1478 /* The disk is unchanged, nothing to update */
1479 goto freeret;
a72da29b 1480
6ae5ce8e
MM		 1481 /* If we get here it's not the same disk, or something's changed,
1482 * so we need to * deregister it, and re-register it, if it's not
1483 * in use.
1484 * If the disk already exists then deregister it before proceeding
1485 * (unless it's the first disk (for the controller node).
1486 */
a72da29b
MM		 1487 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1488 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1489 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1490 h->drv[drv_index].busy_configuring = 1;
1491 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1492
6ae5ce8e
MM		 1493 /* deregister_disk sets h->drv[drv_index].queue = NULL
1494 * which keeps the interrupt handler from starting
1495 * the queue.
1496 */
a0ea8622 1497 ret = deregister_disk(h, drv_index, 0);
ddd47442
MM		 1498 h->drv[drv_index].busy_configuring = 0;
1499 }
1500
1501 /* If the disk is in use return */
1502 if (ret)
a72da29b
MM		 1503 goto freeret;
1504
6ae5ce8e
MM		 1505 /* Save the new information from cciss_geometry_inquiry
1506 * and serial number inquiry.
1507 */
a72da29b
MM		 1508 h->drv[drv_index].block_size = drvinfo->block_size;
1509 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1510 h->drv[drv_index].heads = drvinfo->heads;
1511 h->drv[drv_index].sectors = drvinfo->sectors;
1512 h->drv[drv_index].cylinders = drvinfo->cylinders;
1513 h->drv[drv_index].raid_level = drvinfo->raid_level;
1514 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
ddd47442
MM		 1515
1516 ++h->num_luns;
1517 disk = h->gendisk[drv_index];
1518 set_capacity(disk, h->drv[drv_index].nr_blocks);
1519
6ae5ce8e
MM		 1520 /* If it's not disk 0 (drv_index != 0)
1521 * or if it was disk 0, but there was previously
1522 * no actual corresponding configured logical drive
1523 * (raid_leve == -1) then we want to update the
1524 * logical drive's information.
1525 */
1526 if (drv_index || first_time)
1527 cciss_add_disk(h, disk, drv_index);
ddd47442 1528
6ae5ce8e 1529freeret:
ddd47442 1530 kfree(inq_buff);
a72da29b 1531 kfree(drvinfo);
ddd47442 1532 return;
6ae5ce8e 1533mem_msg:
ddd47442
MM		 1534 printk(KERN_ERR "cciss: out of memory\n");
1535 goto freeret;
1536}
1537
1538/* This function will find the first index of the controllers drive array
1539 * that has a -1 for the raid_level and will return that index. This is
1540 * where new drives will be added. If the index to be returned is greater
1541 * than the highest_lun index for the controller then highest_lun is set
1542 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1543 * "controller_node" is used to know if this is a real logical drive, or just
1544 * the controller node, which determines if this counts towards highest_lun.
7c832835 1545 */
eece695f 1546static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1547{
1548 int i;
1549
7c832835
BH		 1550 for (i = 0; i < CISS_MAX_LUN; i++) {
1551 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1552 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1553 if (!controller_node)
1554 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1555 return i;
1556 }
1557 }
1558 return -1;
1559}
1560
6ae5ce8e
MM		 1561/* cciss_add_gendisk finds a free hba[]->drv structure
1562 * and allocates a gendisk if needed, and sets the lunid
1563 * in the drvinfo structure. It returns the index into
1564 * the ->drv[] array, or -1 if none are free.
1565 * is_controller_node indicates whether highest_lun should
1566 * count this disk, or if it's only being added to provide
1567 * a means to talk to the controller in case no logical
1568 * drives have yet been configured.
1569 */
eece695f 1570static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
6ae5ce8e
MM		 1571{
1572 int drv_index;
1573
eece695f 1574 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1575 if (drv_index == -1)
1576 return -1;
1577 /*Check if the gendisk needs to be allocated */
1578 if (!h->gendisk[drv_index]) {
1579 h->gendisk[drv_index] =
1580 alloc_disk(1 << NWD_SHIFT);
1581 if (!h->gendisk[drv_index]) {
1582 printk(KERN_ERR "cciss%d: could not "
1583 "allocate a new disk %d\n",
1584 h->ctlr, drv_index);
1585 return -1;
1586 }
1587 }
1588 h->drv[drv_index].LunID = lunid;
1589
1590 /* Don't need to mark this busy because nobody */
1591 /* else knows about this disk yet to contend */
1592 /* for access to it. */
1593 h->drv[drv_index].busy_configuring = 0;
1594 wmb();
1595 return drv_index;
1596}
1597
1598/* This is for the special case of a controller which
1599 * has no logical drives. In this case, we still need
1600 * to register a disk so the controller can be accessed
1601 * by the Array Config Utility.
1602 */
1603static void cciss_add_controller_node(ctlr_info_t *h)
1604{
1605 struct gendisk *disk;
1606 int drv_index;
1607
1608 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1609 return;
1610
eece695f 1611 drv_index = cciss_add_gendisk(h, 0, 1);
6ae5ce8e
MM		 1612 if (drv_index == -1) {
1613 printk(KERN_WARNING "cciss%d: could not "
1614 "add disk 0.\n", h->ctlr);
1615 return;
1616 }
1617 h->drv[drv_index].block_size = 512;
1618 h->drv[drv_index].nr_blocks = 0;
1619 h->drv[drv_index].heads = 0;
1620 h->drv[drv_index].sectors = 0;
1621 h->drv[drv_index].cylinders = 0;
1622 h->drv[drv_index].raid_level = -1;
1623 memset(h->drv[drv_index].serial_no, 0, 16);
1624 disk = h->gendisk[drv_index];
1625 cciss_add_disk(h, disk, drv_index);
1626}
1627
ddd47442 1628/* This function will add and remove logical drives from the Logical
d14c4ab5 1629 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 1630 * so that mount points are preserved until the next reboot. This allows
1631 * for the removal of logical drives in the middle of the drive array
1632 * without a re-ordering of those drives.
1633 * INPUT
1634 * h = The controller to perform the operations on
7c832835 1635 */
6ae5ce8e 1636static int rebuild_lun_table(ctlr_info_t *h, int first_time)
1da177e4 1637{
ddd47442
MM		 1638 int ctlr = h->ctlr;
1639 int num_luns;
1640 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 1641 int return_code;
1642 int listlength = 0;
1643 int i;
1644 int drv_found;
1645 int drv_index = 0;
1646 __u32 lunid = 0;
1da177e4 1647 unsigned long flags;
ddd47442 1648
6ae5ce8e
MM		 1649 if (!capable(CAP_SYS_RAWIO))
1650 return -EPERM;
1651
ddd47442
MM		 1652 /* Set busy_configuring flag for this operation */
1653 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 1654 if (h->busy_configuring) {
ddd47442
MM		 1655 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1656 return -EBUSY;
1657 }
1658 h->busy_configuring = 1;
a72da29b 1659 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 1660
a72da29b
MM		 1661 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1662 if (ld_buff == NULL)
1663 goto mem_msg;
1664
1665 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
1666 sizeof(ReportLunData_struct), 0,
1667 0, 0, TYPE_CMD);
ddd47442 1668
a72da29b
MM		 1669 if (return_code == IO_OK)
1670 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
1671 else { /* reading number of logical volumes failed */
1672 printk(KERN_WARNING "cciss: report logical volume"
1673 " command failed\n");
1674 listlength = 0;
1675 goto freeret;
1676 }
1677
1678 num_luns = listlength / 8; /* 8 bytes per entry */
1679 if (num_luns > CISS_MAX_LUN) {
1680 num_luns = CISS_MAX_LUN;
1681 printk(KERN_WARNING "cciss: more luns configured"
1682 " on controller than can be handled by"
1683 " this driver.\n");
1684 }
1685
6ae5ce8e
MM		 1686 if (num_luns == 0)
1687 cciss_add_controller_node(h);
1688
1689 /* Compare controller drive array to driver's drive array
1690 * to see if any drives are missing on the controller due
1691 * to action of Array Config Utility (user deletes drive)
1692 * and deregister logical drives which have disappeared.
1693 */
a72da29b
MM		 1694 for (i = 0; i <= h->highest_lun; i++) {
1695 int j;
1696 drv_found = 0;
d8a0be6a
SC		 1697
1698 /* skip holes in the array from already deleted drives */
1699 if (h->drv[i].raid_level == -1)
1700 continue;
1701
a72da29b
MM		 1702 for (j = 0; j < num_luns; j++) {
1703 memcpy(&lunid, &ld_buff->LUN[j][0], 4);
1704 lunid = le32_to_cpu(lunid);
1705 if (h->drv[i].LunID == lunid) {
1706 drv_found = 1;
1707 break;
1708 }
1709 }
1710 if (!drv_found) {
1711 /* Deregister it from the OS, it's gone. */
1712 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1713 h->drv[i].busy_configuring = 1;
1714 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
a0ea8622 1715 return_code = deregister_disk(h, i, 1);
a72da29b 1716 h->drv[i].busy_configuring = 0;
ddd47442 1717 }
a72da29b 1718 }
ddd47442 1719
a72da29b
MM		 1720 /* Compare controller drive array to driver's drive array.
1721 * Check for updates in the drive information and any new drives
1722 * on the controller due to ACU adding logical drives, or changing
1723 * a logical drive's size, etc. Reregister any new/changed drives
1724 */
1725 for (i = 0; i < num_luns; i++) {
1726 int j;
ddd47442 1727
a72da29b 1728 drv_found = 0;
ddd47442 1729
a72da29b
MM		 1730 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
1731 lunid = le32_to_cpu(lunid);
ddd47442 1732
a72da29b
MM		 1733 /* Find if the LUN is already in the drive array
1734 * of the driver. If so then update its info
1735 * if not in use. If it does not exist then find
1736 * the first free index and add it.
1737 */
1738 for (j = 0; j <= h->highest_lun; j++) {
1739 if (h->drv[j].raid_level != -1 &&
1740 h->drv[j].LunID == lunid) {
1741 drv_index = j;
1742 drv_found = 1;
1743 break;
ddd47442 1744 }
a72da29b 1745 }
ddd47442 1746
a72da29b
MM		 1747 /* check if the drive was found already in the array */
1748 if (!drv_found) {
eece695f 1749 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 1750 if (drv_index == -1)
1751 goto freeret;
a72da29b 1752 }
6ae5ce8e 1753 cciss_update_drive_info(ctlr, drv_index, first_time);
a72da29b 1754 } /* end for */
ddd47442 1755
6ae5ce8e 1756freeret:
ddd47442
MM		 1757 kfree(ld_buff);
1758 h->busy_configuring = 0;
1759 /* We return -1 here to tell the ACU that we have registered/updated
1760 * all of the drives that we can and to keep it from calling us
1761 * additional times.
7c832835 1762 */
ddd47442 1763 return -1;
6ae5ce8e 1764mem_msg:
ddd47442 1765 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 1766 h->busy_configuring = 0;
ddd47442
MM		 1767 goto freeret;
1768}
1769
1770/* This function will deregister the disk and it's queue from the
1771 * kernel. It must be called with the controller lock held and the
1772 * drv structures busy_configuring flag set. It's parameters are:
1773 *
1774 * disk = This is the disk to be deregistered
1775 * drv = This is the drive_info_struct associated with the disk to be
1776 * deregistered. It contains information about the disk used
1777 * by the driver.
1778 * clear_all = This flag determines whether or not the disk information
1779 * is going to be completely cleared out and the highest_lun
1780 * reset. Sometimes we want to clear out information about
d14c4ab5 1781 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 1782 * the highest_lun should be left unchanged and the LunID
1783 * should not be cleared.
1784*/
a0ea8622 1785static int deregister_disk(ctlr_info_t *h, int drv_index,
ddd47442
MM		 1786 int clear_all)
1787{
799202cb 1788 int i;
a0ea8622
SC		 1789 struct gendisk *disk;
1790 drive_info_struct *drv;
1da177e4
LT		 1791
1792 if (!capable(CAP_SYS_RAWIO))
1793 return -EPERM;
1794
a0ea8622
SC		 1795 drv = &h->drv[drv_index];
1796 disk = h->gendisk[drv_index];
1797
1da177e4 1798 /* make sure logical volume is NOT is use */
7c832835
BH		 1799 if (clear_all || (h->gendisk[0] == disk)) {
1800 if (drv->usage_count > 1)
1801 return -EBUSY;
1802 } else if (drv->usage_count > 0)
1803 return -EBUSY;
1da177e4 1804
ddd47442
MM		 1805 /* invalidate the devices and deregister the disk. If it is disk
1806 * zero do not deregister it but just zero out it's values. This
1807 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 1808 */
1809 if (h->gendisk[0] != disk) {
5a9df732
AB		 1810 struct request_queue *q = disk->queue;
1811 if (disk->flags & GENHD_FL_UP)
1812 del_gendisk(disk);
1813 if (q) {
1814 blk_cleanup_queue(q);
1815 /* Set drv->queue to NULL so that we do not try
1816 * to call blk_start_queue on this queue in the
1817 * interrupt handler
1818 */
1819 drv->queue = NULL;
1820 }
1821 /* If clear_all is set then we are deleting the logical
1822 * drive, not just refreshing its info. For drives
1823 * other than disk 0 we will call put_disk. We do not
1824 * do this for disk 0 as we need it to be able to
1825 * configure the controller.
a72da29b 1826 */
5a9df732
AB		 1827 if (clear_all){
1828 /* This isn't pretty, but we need to find the
1829 * disk in our array and NULL our the pointer.
1830 * This is so that we will call alloc_disk if
1831 * this index is used again later.
a72da29b 1832 */
5a9df732 1833 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 1834 if (h->gendisk[i] == disk) {
5a9df732
AB		 1835 h->gendisk[i] = NULL;
1836 break;
799202cb 1837 }
799202cb 1838 }
5a9df732 1839 put_disk(disk);
ddd47442 1840 }
799202cb
MM		 1841 } else {
1842 set_capacity(disk, 0);
ddd47442
MM		 1843 }
1844
1845 --h->num_luns;
1846 /* zero out the disk size info */
1847 drv->nr_blocks = 0;
1848 drv->block_size = 0;
1849 drv->heads = 0;
1850 drv->sectors = 0;
1851 drv->cylinders = 0;
1852 drv->raid_level = -1; /* This can be used as a flag variable to
1853 * indicate that this element of the drive
1854 * array is free.
7c832835
BH		 1855 */
1856
1857 if (clear_all) {
1858 /* check to see if it was the last disk */
1859 if (drv == h->drv + h->highest_lun) {
1860 /* if so, find the new hightest lun */
1861 int i, newhighest = -1;
a72da29b 1862 for (i = 0; i <= h->highest_lun; i++) {
7c832835 1863 /* if the disk has size > 0, it is available */
ddd47442 1864 if (h->drv[i].heads)
7c832835
BH		 1865 newhighest = i;
1866 }
1867 h->highest_lun = newhighest;
1da177e4 1868 }
ddd47442 1869
7c832835 1870 drv->LunID = 0;
ddd47442 1871 }
e2019b58 1872 return 0;
1da177e4 1873}
ddd47442 1874
7c832835
BH		 1875static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num, /* 0: address the controller,
1876 1: address logical volume log_unit,
1877 2: periph device address is scsi3addr */
1878 unsigned int log_unit, __u8 page_code,
1879 unsigned char *scsi3addr, int cmd_type)
1da177e4 1880{
7c832835 1881 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 1882 u64bit buff_dma_handle;
1883 int status = IO_OK;
1884
1885 c->cmd_type = CMD_IOCTL_PEND;
1886 c->Header.ReplyQueue = 0;
7c832835 1887 if (buff != NULL) {
1da177e4 1888 c->Header.SGList = 1;
7c832835 1889 c->Header.SGTotal = 1;
1da177e4
LT		 1890 } else {
1891 c->Header.SGList = 0;
7c832835 1892 c->Header.SGTotal = 0;
1da177e4
LT		 1893 }
1894 c->Header.Tag.lower = c->busaddr;
1895
1896 c->Request.Type.Type = cmd_type;
1897 if (cmd_type == TYPE_CMD) {
7c832835
BH		 1898 switch (cmd) {
1899 case CISS_INQUIRY:
1da177e4 1900 /* If the logical unit number is 0 then, this is going
7c832835
BH		 1901 to controller so It's a physical command
1902 mode = 0 target = 0. So we have nothing to write.
1903 otherwise, if use_unit_num == 1,
1904 mode = 1(volume set addressing) target = LUNID
1905 otherwise, if use_unit_num == 2,
1906 mode = 0(periph dev addr) target = scsi3addr */
1da177e4 1907 if (use_unit_num == 1) {
7c832835
BH		 1908 c->Header.LUN.LogDev.VolId =
1909 h->drv[log_unit].LunID;
1910 c->Header.LUN.LogDev.Mode = 1;
1da177e4 1911 } else if (use_unit_num == 2) {
7c832835
BH		 1912 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr,
1913 8);
1da177e4
LT		 1914 c->Header.LUN.LogDev.Mode = 0;
1915 }
1916 /* are we trying to read a vital product page */
7c832835 1917 if (page_code != 0) {
1da177e4
LT		 1918 c->Request.CDB[1] = 0x01;
1919 c->Request.CDB[2] = page_code;
1920 }
1921 c->Request.CDBLen = 6;
7c832835 1922 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 1923 c->Request.Type.Direction = XFER_READ;
1924 c->Request.Timeout = 0;
7c832835
BH		 1925 c->Request.CDB[0] = CISS_INQUIRY;
1926 c->Request.CDB[4] = size & 0xFF;
1927 break;
1da177e4
LT		 1928 case CISS_REPORT_LOG:
1929 case CISS_REPORT_PHYS:
7c832835 1930 /* Talking to controller so It's a physical command
1da177e4 1931 mode = 00 target = 0. Nothing to write.
7c832835 1932 */
1da177e4
LT		 1933 c->Request.CDBLen = 12;
1934 c->Request.Type.Attribute = ATTR_SIMPLE;
1935 c->Request.Type.Direction = XFER_READ;
1936 c->Request.Timeout = 0;
1937 c->Request.CDB[0] = cmd;
7c832835 1938 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 1939 c->Request.CDB[7] = (size >> 16) & 0xFF;
1940 c->Request.CDB[8] = (size >> 8) & 0xFF;
1941 c->Request.CDB[9] = size & 0xFF;
1942 break;
1943
1944 case CCISS_READ_CAPACITY:
1945 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1946 c->Header.LUN.LogDev.Mode = 1;
1947 c->Request.CDBLen = 10;
1948 c->Request.Type.Attribute = ATTR_SIMPLE;
1949 c->Request.Type.Direction = XFER_READ;
1950 c->Request.Timeout = 0;
1951 c->Request.CDB[0] = cmd;
7c832835 1952 break;
00988a35
MMOD		 1953 case CCISS_READ_CAPACITY_16:
1954 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1955 c->Header.LUN.LogDev.Mode = 1;
1956 c->Request.CDBLen = 16;
1957 c->Request.Type.Attribute = ATTR_SIMPLE;
1958 c->Request.Type.Direction = XFER_READ;
1959 c->Request.Timeout = 0;
1960 c->Request.CDB[0] = cmd;
1961 c->Request.CDB[1] = 0x10;
1962 c->Request.CDB[10] = (size >> 24) & 0xFF;
1963 c->Request.CDB[11] = (size >> 16) & 0xFF;
1964 c->Request.CDB[12] = (size >> 8) & 0xFF;
1965 c->Request.CDB[13] = size & 0xFF;
1966 c->Request.Timeout = 0;
1967 c->Request.CDB[0] = cmd;
1968 break;
1da177e4
LT		 1969 case CCISS_CACHE_FLUSH:
1970 c->Request.CDBLen = 12;
1971 c->Request.Type.Attribute = ATTR_SIMPLE;
1972 c->Request.Type.Direction = XFER_WRITE;
1973 c->Request.Timeout = 0;
1974 c->Request.CDB[0] = BMIC_WRITE;
1975 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 1976 break;
1da177e4
LT		 1977 default:
1978 printk(KERN_WARNING
7c832835 1979 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 1980 return IO_ERROR;
1da177e4
LT		 1981 }
1982 } else if (cmd_type == TYPE_MSG) {
1983 switch (cmd) {
7c832835 1984 case 0: /* ABORT message */
3da8b713 1985 c->Request.CDBLen = 12;
1986 c->Request.Type.Attribute = ATTR_SIMPLE;
1987 c->Request.Type.Direction = XFER_WRITE;
1988 c->Request.Timeout = 0;
7c832835
BH		 1989 c->Request.CDB[0] = cmd; /* abort */
1990 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 1991 /* buff contains the tag of the command to abort */
1992 memcpy(&c->Request.CDB[4], buff, 8);
1993 break;
7c832835 1994 case 1: /* RESET message */
3da8b713 1995 c->Request.CDBLen = 12;
1996 c->Request.Type.Attribute = ATTR_SIMPLE;
1997 c->Request.Type.Direction = XFER_WRITE;
1998 c->Request.Timeout = 0;
1999 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835
BH		 2000 c->Request.CDB[0] = cmd; /* reset */
2001 c->Request.CDB[1] = 0x04; /* reset a LUN */
00988a35 2002 break;
1da177e4
LT		 2003 case 3: /* No-Op message */
2004 c->Request.CDBLen = 1;
2005 c->Request.Type.Attribute = ATTR_SIMPLE;
2006 c->Request.Type.Direction = XFER_WRITE;
2007 c->Request.Timeout = 0;
2008 c->Request.CDB[0] = cmd;
2009 break;
2010 default:
2011 printk(KERN_WARNING
7c832835 2012 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2013 return IO_ERROR;
2014 }
2015 } else {
2016 printk(KERN_WARNING
7c832835 2017 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2018 return IO_ERROR;
2019 }
2020 /* Fill in the scatter gather information */
2021 if (size > 0) {
2022 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2023 buff, size,
2024 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2025 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2026 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2027 c->SG[0].Len = size;
7c832835 2028 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2029 }
2030 return status;
2031}
7c832835
BH		 2032
2033static int sendcmd_withirq(__u8 cmd,
2034 int ctlr,
2035 void *buff,
2036 size_t size,
2037 unsigned int use_unit_num,
2038 unsigned int log_unit, __u8 page_code, int cmd_type)
1da177e4
LT		 2039{
2040 ctlr_info_t *h = hba[ctlr];
2041 CommandList_struct *c;
7c832835 2042 u64bit buff_dma_handle;
1da177e4
LT		 2043 unsigned long flags;
2044 int return_status;
6e9a4738 2045 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 2046
2047 if ((c = cmd_alloc(h, 0)) == NULL)
1da177e4
LT		 2048 return -ENOMEM;
2049 return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
7c832835 2050 log_unit, page_code, NULL, cmd_type);
1da177e4
LT		 2051 if (return_status != IO_OK) {
2052 cmd_free(h, c, 0);
2053 return return_status;
2054 }
7c832835 2055 resend_cmd2:
1da177e4 2056 c->waiting = &wait;
7c832835 2057
1da177e4
LT		 2058 /* Put the request on the tail of the queue and send it */
2059 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
2060 addQ(&h->reqQ, c);
2061 h->Qdepth++;
2062 start_io(h);
2063 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
7c832835 2064
1da177e4
LT		 2065 wait_for_completion(&wait);
2066
7c832835
BH		 2067 if (c->err_info->CommandStatus != 0) { /* an error has occurred */
2068 switch (c->err_info->CommandStatus) {
2069 case CMD_TARGET_STATUS:
2070 printk(KERN_WARNING "cciss: cmd %p has "
2071 " completed with errors\n", c);
2072 if (c->err_info->ScsiStatus) {
2073 printk(KERN_WARNING "cciss: cmd %p "
2074 "has SCSI Status = %x\n",
2075 c, c->err_info->ScsiStatus);
2076 }
1da177e4
LT		 2077
2078 break;
7c832835
BH		 2079 case CMD_DATA_UNDERRUN:
2080 case CMD_DATA_OVERRUN:
1da177e4
LT		 2081 /* expected for inquire and report lun commands */
2082 break;
7c832835
BH		 2083 case CMD_INVALID:
2084 printk(KERN_WARNING "cciss: Cmd %p is "
2085 "reported invalid\n", c);
2086 return_status = IO_ERROR;
1da177e4 2087 break;
7c832835
BH		 2088 case CMD_PROTOCOL_ERR:
2089 printk(KERN_WARNING "cciss: cmd %p has "
2090 "protocol error \n", c);
2091 return_status = IO_ERROR;
1da177e4 2092 break;
7c832835
BH		 2093 case CMD_HARDWARE_ERR:
2094 printk(KERN_WARNING "cciss: cmd %p had "
2095 " hardware error\n", c);
2096 return_status = IO_ERROR;
1da177e4 2097 break;
7c832835
BH		 2098 case CMD_CONNECTION_LOST:
2099 printk(KERN_WARNING "cciss: cmd %p had "
2100 "connection lost\n", c);
2101 return_status = IO_ERROR;
1da177e4 2102 break;
7c832835
BH		 2103 case CMD_ABORTED:
2104 printk(KERN_WARNING "cciss: cmd %p was "
2105 "aborted\n", c);
2106 return_status = IO_ERROR;
1da177e4 2107 break;
7c832835
BH		 2108 case CMD_ABORT_FAILED:
2109 printk(KERN_WARNING "cciss: cmd %p reports "
2110 "abort failed\n", c);
2111 return_status = IO_ERROR;
2112 break;
2113 case CMD_UNSOLICITED_ABORT:
2114 printk(KERN_WARNING
2115 "cciss%d: unsolicited abort %p\n", ctlr, c);
2116 if (c->retry_count < MAX_CMD_RETRIES) {
2117 printk(KERN_WARNING
2118 "cciss%d: retrying %p\n", ctlr, c);
2119 c->retry_count++;
2120 /* erase the old error information */
2121 memset(c->err_info, 0,
2122 sizeof(ErrorInfo_struct));
2123 return_status = IO_OK;
2124 INIT_COMPLETION(wait);
2125 goto resend_cmd2;
2126 }
2127 return_status = IO_ERROR;
2128 break;
2129 default:
2130 printk(KERN_WARNING "cciss: cmd %p returned "
2131 "unknown status %x\n", c,
2132 c->err_info->CommandStatus);
2133 return_status = IO_ERROR;
1da177e4 2134 }
7c832835 2135 }
1da177e4 2136 /* unlock the buffers from DMA */
bb2a37bf
MM		 2137 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2138 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2139 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2140 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
1da177e4 2141 cmd_free(h, c, 0);
7c832835 2142 return return_status;
1da177e4 2143}
7c832835 2144
1da177e4 2145static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2146 int withirq, sector_t total_size,
7c832835
BH		 2147 unsigned int block_size,
2148 InquiryData_struct *inq_buff,
2149 drive_info_struct *drv)
1da177e4
LT		 2150{
2151 int return_code;
00988a35 2152 unsigned long t;
00988a35 2153
1da177e4
LT		 2154 memset(inq_buff, 0, sizeof(InquiryData_struct));
2155 if (withirq)
2156 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
7c832835
BH		 2157 inq_buff, sizeof(*inq_buff), 1,
2158 logvol, 0xC1, TYPE_CMD);
1da177e4
LT		 2159 else
2160 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
7c832835
BH		 2161 sizeof(*inq_buff), 1, logvol, 0xC1, NULL,
2162 TYPE_CMD);
1da177e4 2163 if (return_code == IO_OK) {
7c832835 2164 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2165 printk(KERN_WARNING
7c832835
BH		 2166 "cciss: reading geometry failed, volume "
2167 "does not support reading geometry\n");
1da177e4 2168 drv->heads = 255;
7c832835 2169 drv->sectors = 32; // Sectors per track
7f42d3b8 2170 drv->cylinders = total_size + 1;
89f97ad1 2171 drv->raid_level = RAID_UNKNOWN;
1da177e4 2172 } else {
1da177e4
LT		 2173 drv->heads = inq_buff->data_byte[6];
2174 drv->sectors = inq_buff->data_byte[7];
2175 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2176 drv->cylinders += inq_buff->data_byte[5];
2177 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2178 }
2179 drv->block_size = block_size;
97c06978 2180 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2181 t = drv->heads * drv->sectors;
2182 if (t > 1) {
97c06978
MMOD		 2183 sector_t real_size = total_size + 1;
2184 unsigned long rem = sector_div(real_size, t);
3f7705ea 2185 if (rem)
97c06978
MMOD		 2186 real_size++;
2187 drv->cylinders = real_size;
1da177e4 2188 }
7c832835 2189 } else { /* Get geometry failed */
1da177e4
LT		 2190 printk(KERN_WARNING "cciss: reading geometry failed\n");
2191 }
cc088d10 2192 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
7c832835 2193 drv->heads, drv->sectors, drv->cylinders);
1da177e4 2194}
7c832835 2195
1da177e4 2196static void
00988a35 2197cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2198 unsigned int *block_size)
1da177e4 2199{
00988a35 2200 ReadCapdata_struct *buf;
1da177e4 2201 int return_code;
1aebe187
MK		 2202
2203 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2204 if (!buf) {
00988a35
MMOD		 2205 printk(KERN_WARNING "cciss: out of memory\n");
2206 return;
2207 }
1aebe187 2208
1da177e4
LT		 2209 if (withirq)
2210 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35
MMOD		 2211 ctlr, buf, sizeof(ReadCapdata_struct),
2212 1, logvol, 0, TYPE_CMD);
1da177e4
LT		 2213 else
2214 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35
MMOD		 2215 ctlr, buf, sizeof(ReadCapdata_struct),
2216 1, logvol, 0, NULL, TYPE_CMD);
1da177e4 2217 if (return_code == IO_OK) {
4c1f2b31
AV		 2218 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2219 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2220 } else { /* read capacity command failed */
1da177e4
LT		 2221 printk(KERN_WARNING "cciss: read capacity failed\n");
2222 *total_size = 0;
2223 *block_size = BLOCK_SIZE;
2224 }
97c06978 2225 if (*total_size != 0)
7b92aadf 2226 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2227 (unsigned long long)*total_size+1, *block_size);
00988a35 2228 kfree(buf);
00988a35
MMOD		 2229}
2230
2231static void
2232cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2233{
2234 ReadCapdata_struct_16 *buf;
2235 int return_code;
1aebe187
MK		 2236
2237 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2238 if (!buf) {
00988a35
MMOD		 2239 printk(KERN_WARNING "cciss: out of memory\n");
2240 return;
2241 }
1aebe187 2242
00988a35
MMOD		 2243 if (withirq) {
2244 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2245 ctlr, buf, sizeof(ReadCapdata_struct_16),
2246 1, logvol, 0, TYPE_CMD);
2247 }
2248 else {
2249 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2250 ctlr, buf, sizeof(ReadCapdata_struct_16),
2251 1, logvol, 0, NULL, TYPE_CMD);
2252 }
2253 if (return_code == IO_OK) {
4c1f2b31
AV		 2254 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2255 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2256 } else { /* read capacity command failed */
2257 printk(KERN_WARNING "cciss: read capacity failed\n");
2258 *total_size = 0;
2259 *block_size = BLOCK_SIZE;
2260 }
7b92aadf 2261 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2262 (unsigned long long)*total_size+1, *block_size);
00988a35 2263 kfree(buf);
1da177e4
LT		 2264}
2265
1da177e4
LT		 2266static int cciss_revalidate(struct gendisk *disk)
2267{
2268 ctlr_info_t *h = get_host(disk);
2269 drive_info_struct *drv = get_drv(disk);
2270 int logvol;
7c832835 2271 int FOUND = 0;
1da177e4 2272 unsigned int block_size;
00988a35 2273 sector_t total_size;
1da177e4
LT		 2274 InquiryData_struct *inq_buff = NULL;
2275
7c832835
BH		 2276 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2277 if (h->drv[logvol].LunID == drv->LunID) {
2278 FOUND = 1;
1da177e4
LT		 2279 break;
2280 }
2281 }
2282
7c832835
BH		 2283 if (!FOUND)
2284 return 1;
1da177e4 2285
7c832835
BH		 2286 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2287 if (inq_buff == NULL) {
2288 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2289 return 1;
2290 }
00988a35
MMOD		 2291 if (h->cciss_read == CCISS_READ_10) {
2292 cciss_read_capacity(h->ctlr, logvol, 1,
2293 &total_size, &block_size);
2294 } else {
2295 cciss_read_capacity_16(h->ctlr, logvol, 1,
2296 &total_size, &block_size);
2297 }
7c832835
BH		 2298 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2299 inq_buff, drv);
1da177e4 2300
e1defc4f 2301 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2302 set_capacity(disk, drv->nr_blocks);
2303
1da177e4
LT		 2304 kfree(inq_buff);
2305 return 0;
2306}
2307
2308/*
2309 * Wait polling for a command to complete.
2310 * The memory mapped FIFO is polled for the completion.
2311 * Used only at init time, interrupts from the HBA are disabled.
2312 */
2313static unsigned long pollcomplete(int ctlr)
2314{
2315 unsigned long done;
2316 int i;
2317
2318 /* Wait (up to 20 seconds) for a command to complete */
2319
2320 for (i = 20 * HZ; i > 0; i--) {
2321 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2322 if (done == FIFO_EMPTY)
2323 schedule_timeout_uninterruptible(1);
2324 else
e2019b58 2325 return done;
1da177e4
LT		 2326 }
2327 /* Invalid address to tell caller we ran out of time */
2328 return 1;
2329}
3da8b713 2330
2331static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
2332{
2333 /* We get in here if sendcmd() is polling for completions
7c832835
BH		 2334 and gets some command back that it wasn't expecting --
2335 something other than that which it just sent down.
2336 Ordinarily, that shouldn't happen, but it can happen when
3da8b713 2337 the scsi tape stuff gets into error handling mode, and
7c832835 2338 starts using sendcmd() to try to abort commands and
3da8b713 2339 reset tape drives. In that case, sendcmd may pick up
2340 completions of commands that were sent to logical drives
7c832835 2341 through the block i/o system, or cciss ioctls completing, etc.
3da8b713 2342 In that case, we need to save those completions for later
2343 processing by the interrupt handler.
7c832835 2344 */
3da8b713 2345
2346#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 2347 struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
3da8b713 2348
2349 /* If it's not the scsi tape stuff doing error handling, (abort */
2350 /* or reset) then we don't expect anything weird. */
2351 if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
2352#endif
7c832835
BH		 2353 printk(KERN_WARNING "cciss cciss%d: SendCmd "
2354 "Invalid command list address returned! (%lx)\n",
2355 ctlr, complete);
3da8b713 2356 /* not much we can do. */
2357#ifdef CONFIG_CISS_SCSI_TAPE
2358 return 1;
2359 }
2360
2361 /* We've sent down an abort or reset, but something else
2362 has completed */
f880632f 2363 if (srl->ncompletions >= (hba[ctlr]->nr_cmds + 2)) {
3da8b713 2364 /* Uh oh. No room to save it for later... */
2365 printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
7c832835 2366 "reject list overflow, command lost!\n", ctlr);
3da8b713 2367 return 1;
2368 }
2369 /* Save it for later */
2370 srl->complete[srl->ncompletions] = complete;
2371 srl->ncompletions++;
2372#endif
2373 return 0;
2374}
2375
4a4b2d76
SC		 2376/* Send command c to controller h and poll for it to complete.
2377 * Turns interrupts off on the board. Used at driver init time
2378 * and during SCSI error recovery.
1da177e4 2379 */
4a4b2d76 2380static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2381{
1da177e4
LT		 2382 int i;
2383 unsigned long complete;
4a4b2d76 2384 int status = IO_ERROR;
1da177e4 2385 u64bit buff_dma_handle;
1da177e4 2386
4a4b2d76
SC		 2387resend_cmd1:
2388
2389 /* Disable interrupt on the board. */
2390 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2391
1da177e4 2392 /* Make sure there is room in the command FIFO */
7c832835 2393 /* Actually it should be completely empty at this time */
3da8b713 2394 /* unless we are in here doing error handling for the scsi */
2395 /* tape side of the driver. */
7c832835 2396 for (i = 200000; i > 0; i--) {
1da177e4 2397 /* if fifo isn't full go */
4a4b2d76 2398 if (!(h->access.fifo_full(h)))
7c832835 2399 break;
7c832835
BH		 2400 udelay(10);
2401 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2402 " waiting!\n", h->ctlr);
7c832835 2403 }
4a4b2d76 2404 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2405 do {
4a4b2d76 2406 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2407
2408#ifdef CCISS_DEBUG
3da8b713 2409 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2410#endif /* CCISS_DEBUG */
1da177e4 2411
3da8b713 2412 if (complete == 1) {
7c832835
BH		 2413 printk(KERN_WARNING
2414 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2415 "No command list address returned!\n", h->ctlr);
3da8b713 2416 status = IO_ERROR;
3da8b713 2417 break;
2418 }
2419
4a4b2d76
SC		 2420 /* If it's not the cmd we're looking for, save it for later */
2421 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
2422 if (add_sendcmd_reject(c->Request.CDB[0],
2423 h->ctlr, complete) != 0)
2424 BUG(); /* we are hosed if we get here. */
2425 continue;
2426 }
2427
2428 /* It is our command. If no error, we're done. */
2429 if (!(complete & CISS_ERROR_BIT)) {
2430 status = IO_OK;
2431 break;
2432 }
2433
2434 /* There is an error... */
2435
2436 /* if data overrun or underun on Report command ignore it */
2437 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2438 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2439 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2440 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2441 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2442 complete = c->busaddr;
2443 status = IO_OK;
2444 break;
1da177e4 2445 }
4a4b2d76
SC		 2446
2447 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2448 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2449 h->ctlr, c);
2450 if (c->retry_count < MAX_CMD_RETRIES) {
2451 printk(KERN_WARNING "cciss%d: retrying %p\n",
2452 h->ctlr, c);
2453 c->retry_count++;
2454 /* erase the old error information */
2455 memset(c->err_info, 0, sizeof(c->err_info));
2456 goto resend_cmd1;
3da8b713 2457 }
4a4b2d76
SC		 2458 printk(KERN_WARNING "cciss%d: retried %p too many "
2459 "times\n", h->ctlr, c);
2460 status = IO_ERROR;
2461 goto cleanup1;
2462 }
2463
2464 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2465 printk(KERN_WARNING "cciss%d: command could not be "
2466 "aborted.\n", h->ctlr);
2467 status = IO_ERROR;
2468 goto cleanup1;
2469 }
2470
2471 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2472 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2473 c->Request.CDB[0], c->err_info->CommandStatus);
2474 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
2475 printk(KERN_WARNING "Target status = 0x%02x\n",
2476 c->err_info->ScsiStatus);
2477 if (c->err_info->ScsiStatus == 2) /* chk cond */
2478 printk(KERN_WARNING "Sense key = 0x%02x\n",
2479 0xf & c->err_info->SenseInfo[2]);
2480 }
2481
2482 status = IO_ERROR;
2483 goto cleanup1;
2484
2485 } while (1);
7c832835 2486
4a4b2d76 2487cleanup1:
1da177e4 2488 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2489 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2490 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2491 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2492 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
3da8b713 2493#ifdef CONFIG_CISS_SCSI_TAPE
2494 /* if we saved some commands for later, process them now. */
4a4b2d76
SC		 2495 if (h->scsi_rejects.ncompletions > 0)
2496 do_cciss_intr(0, h);
3da8b713 2497#endif
4a4b2d76
SC		 2498 return status;
2499}
2500
2501/*
2502 * Send a command to the controller, and wait for it to complete.
2503 * Used at init time, and during SCSI error recovery.
2504 */
2505static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
2506 unsigned int use_unit_num,/* 0: address the controller,
2507 1: address logical volume log_unit,
2508 2: periph device address is scsi3addr */
2509 unsigned int log_unit,
2510 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2511{
2512 CommandList_struct *c;
2513 int status;
2514
2515 c = cmd_alloc(hba[ctlr], 1);
2516 if (!c) {
2517 printk(KERN_WARNING "cciss: unable to get memory");
2518 return IO_ERROR;
2519 }
2520 status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
2521 log_unit, page_code, scsi3addr, cmd_type);
2522 if (status == IO_OK)
2523 status = sendcmd_core(hba[ctlr], c);
2524 cmd_free(hba[ctlr], c, 1);
e2019b58 2525 return status;
7c832835
BH		 2526}
2527
1da177e4
LT		 2528/*
2529 * Map (physical) PCI mem into (virtual) kernel space
2530 */
2531static void __iomem *remap_pci_mem(ulong base, ulong size)
2532{
7c832835
BH		 2533 ulong page_base = ((ulong) base) & PAGE_MASK;
2534 ulong page_offs = ((ulong) base) - page_base;
2535 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2536
7c832835 2537 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2538}
2539
7c832835
BH		 2540/*
2541 * Takes jobs of the Q and sends them to the hardware, then puts it on
2542 * the Q to wait for completion.
2543 */
2544static void start_io(ctlr_info_t *h)
1da177e4
LT		 2545{
2546 CommandList_struct *c;
7c832835 2547
8a3173de
JA		 2548 while (!hlist_empty(&h->reqQ)) {
2549 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2550 /* can't do anything if fifo is full */
2551 if ((h->access.fifo_full(h))) {
2552 printk(KERN_WARNING "cciss: fifo full\n");
2553 break;
2554 }
2555
7c832835 2556 /* Get the first entry from the Request Q */
8a3173de 2557 removeQ(c);
1da177e4 2558 h->Qdepth--;
7c832835
BH		 2559
2560 /* Tell the controller execute command */
1da177e4 2561 h->access.submit_command(h, c);
7c832835
BH		 2562
2563 /* Put job onto the completed Q */
8a3173de 2564 addQ(&h->cmpQ, c);
1da177e4
LT		 2565 }
2566}
7c832835 2567
1da177e4
LT		 2568/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2569/* Zeros out the error record and then resends the command back */
2570/* to the controller */
7c832835 2571static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2572{
2573 /* erase the old error information */
2574 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2575
2576 /* add it to software queue and then send it to the controller */
8a3173de 2577 addQ(&h->reqQ, c);
1da177e4 2578 h->Qdepth++;
7c832835 2579 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2580 h->maxQsinceinit = h->Qdepth;
2581
2582 start_io(h);
2583}
a9925a06 2584
1a614f50
SC		 2585static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2586 unsigned int msg_byte, unsigned int host_byte,
2587 unsigned int driver_byte)
2588{
2589 /* inverse of macros in scsi.h */
2590 return (scsi_status_byte & 0xff) |
2591 ((msg_byte & 0xff) << 8) |
2592 ((host_byte & 0xff) << 16) |
2593 ((driver_byte & 0xff) << 24);
2594}
2595
0a9279cc
MM		 2596static inline int evaluate_target_status(ctlr_info_t *h,
2597 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2598{
2599 unsigned char sense_key;
1a614f50
SC		 2600 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2601 int error_value;
2602
0a9279cc 2603 *retry_cmd = 0;
1a614f50
SC		 2604 /* If we get in here, it means we got "target status", that is, scsi status */
2605 status_byte = cmd->err_info->ScsiStatus;
2606 driver_byte = DRIVER_OK;
2607 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2608
2609 if (blk_pc_request(cmd->rq))
2610 host_byte = DID_PASSTHROUGH;
2611 else
2612 host_byte = DID_OK;
2613
2614 error_value = make_status_bytes(status_byte, msg_byte,
2615 host_byte, driver_byte);
03bbfee5 2616
1a614f50 2617 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2618 if (!blk_pc_request(cmd->rq))
2619 printk(KERN_WARNING "cciss: cmd %p "
2620 "has SCSI Status 0x%x\n",
2621 cmd, cmd->err_info->ScsiStatus);
1a614f50 2622 return error_value;
03bbfee5
MMOD		 2623 }
2624
2625 /* check the sense key */
2626 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2627 /* no status or recovered error */
1a614f50
SC		 2628 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2629 error_value = 0;
03bbfee5 2630
0a9279cc
MM		 2631 if (check_for_unit_attention(h, cmd)) {
2632 *retry_cmd = !blk_pc_request(cmd->rq);
2633 return 0;
2634 }
2635
03bbfee5 2636 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2637 if (error_value != 0)
03bbfee5
MMOD		 2638 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2639 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2640 return error_value;
03bbfee5
MMOD		 2641 }
2642
2643 /* SG_IO or similar, copy sense data back */
2644 if (cmd->rq->sense) {
2645 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2646 cmd->rq->sense_len = cmd->err_info->SenseLen;
2647 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2648 cmd->rq->sense_len);
2649 } else
2650 cmd->rq->sense_len = 0;
2651
1a614f50 2652 return error_value;
03bbfee5
MMOD		 2653}
2654
7c832835 2655/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 2656 * buffers for the completed job. Note that this function does not need
2657 * to hold the hba/queue lock.
7c832835
BH		 2658 */
2659static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2660 int timeout)
1da177e4 2661{
1da177e4 2662 int retry_cmd = 0;
198b7660
MMOD		 2663 struct request *rq = cmd->rq;
2664
2665 rq->errors = 0;
7c832835 2666
1da177e4 2667 if (timeout)
1a614f50 2668 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 2669
d38ae168
MMOD		 2670 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2671 goto after_error_processing;
7c832835 2672
d38ae168 2673 switch (cmd->err_info->CommandStatus) {
d38ae168 2674 case CMD_TARGET_STATUS:
0a9279cc 2675 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 2676 break;
2677 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 2678 if (blk_fs_request(cmd->rq)) {
2679 printk(KERN_WARNING "cciss: cmd %p has"
2680 " completed with data underrun "
2681 "reported\n", cmd);
c3a4d78c 2682 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 2683 }
d38ae168
MMOD		 2684 break;
2685 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 2686 if (blk_fs_request(cmd->rq))
2687 printk(KERN_WARNING "cciss: cmd %p has"
2688 " completed with data overrun "
2689 "reported\n", cmd);
d38ae168
MMOD		 2690 break;
2691 case CMD_INVALID:
2692 printk(KERN_WARNING "cciss: cmd %p is "
2693 "reported invalid\n", cmd);
1a614f50
SC		 2694 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2695 cmd->err_info->CommandStatus, DRIVER_OK,
2696 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2697 break;
2698 case CMD_PROTOCOL_ERR:
2699 printk(KERN_WARNING "cciss: cmd %p has "
2700 "protocol error \n", cmd);
1a614f50
SC		 2701 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2702 cmd->err_info->CommandStatus, DRIVER_OK,
2703 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2704 break;
2705 case CMD_HARDWARE_ERR:
2706 printk(KERN_WARNING "cciss: cmd %p had "
2707 " hardware error\n", cmd);
1a614f50
SC		 2708 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2709 cmd->err_info->CommandStatus, DRIVER_OK,
2710 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2711 break;
2712 case CMD_CONNECTION_LOST:
2713 printk(KERN_WARNING "cciss: cmd %p had "
2714 "connection lost\n", cmd);
1a614f50
SC		 2715 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2716 cmd->err_info->CommandStatus, DRIVER_OK,
2717 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2718 break;
2719 case CMD_ABORTED:
2720 printk(KERN_WARNING "cciss: cmd %p was "
2721 "aborted\n", cmd);
1a614f50
SC		 2722 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2723 cmd->err_info->CommandStatus, DRIVER_OK,
2724 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 2725 break;
2726 case CMD_ABORT_FAILED:
2727 printk(KERN_WARNING "cciss: cmd %p reports "
2728 "abort failed\n", cmd);
1a614f50
SC		 2729 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2730 cmd->err_info->CommandStatus, DRIVER_OK,
2731 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2732 break;
2733 case CMD_UNSOLICITED_ABORT:
2734 printk(KERN_WARNING "cciss%d: unsolicited "
2735 "abort %p\n", h->ctlr, cmd);
2736 if (cmd->retry_count < MAX_CMD_RETRIES) {
2737 retry_cmd = 1;
2738 printk(KERN_WARNING
2739 "cciss%d: retrying %p\n", h->ctlr, cmd);
2740 cmd->retry_count++;
2741 } else
2742 printk(KERN_WARNING
2743 "cciss%d: %p retried too "
2744 "many times\n", h->ctlr, cmd);
1a614f50
SC		 2745 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2746 cmd->err_info->CommandStatus, DRIVER_OK,
2747 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 2748 break;
2749 case CMD_TIMEOUT:
2750 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 2751 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2752 cmd->err_info->CommandStatus, DRIVER_OK,
2753 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 2754 break;
2755 default:
2756 printk(KERN_WARNING "cciss: cmd %p returned "
2757 "unknown status %x\n", cmd,
2758 cmd->err_info->CommandStatus);
1a614f50
SC		 2759 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2760 cmd->err_info->CommandStatus, DRIVER_OK,
2761 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 2762 }
d38ae168
MMOD		 2763
2764after_error_processing:
2765
1da177e4 2766 /* We need to return this command */
7c832835
BH		 2767 if (retry_cmd) {
2768 resend_cciss_cmd(h, cmd);
1da177e4 2769 return;
7c832835 2770 }
03bbfee5 2771 cmd->rq->completion_data = cmd;
a9925a06 2772 blk_complete_request(cmd->rq);
1da177e4
LT		 2773}
2774
7c832835
BH		 2775/*
2776 * Get a request and submit it to the controller.
1da177e4 2777 */
165125e1 2778static void do_cciss_request(struct request_queue *q)
1da177e4 2779{
7c832835 2780 ctlr_info_t *h = q->queuedata;
1da177e4 2781 CommandList_struct *c;
00988a35
MMOD		 2782 sector_t start_blk;
2783 int seg;
1da177e4
LT		 2784 struct request *creq;
2785 u64bit temp64;
2786 struct scatterlist tmp_sg[MAXSGENTRIES];
2787 drive_info_struct *drv;
2788 int i, dir;
2789
2790 /* We call start_io here in case there is a command waiting on the
2791 * queue that has not been sent.
7c832835 2792 */
1da177e4
LT		 2793 if (blk_queue_plugged(q))
2794 goto startio;
2795
7c832835 2796 queue:
9934c8c0 2797 creq = blk_peek_request(q);
1da177e4
LT		 2798 if (!creq)
2799 goto startio;
2800
089fe1b2 2801 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 2802
7c832835 2803 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 2804 goto full;
2805
9934c8c0 2806 blk_start_request(creq);
1da177e4
LT		 2807
2808 spin_unlock_irq(q->queue_lock);
2809
2810 c->cmd_type = CMD_RWREQ;
2811 c->rq = creq;
7c832835
BH		 2812
2813 /* fill in the request */
1da177e4 2814 drv = creq->rq_disk->private_data;
7c832835 2815 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 2816 /* got command from pool, so use the command block index instead */
2817 /* for direct lookups. */
2818 /* The first 2 bits are reserved for controller error reporting. */
2819 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835
BH		 2820 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
2821 c->Header.LUN.LogDev.VolId = drv->LunID;
1da177e4 2822 c->Header.LUN.LogDev.Mode = 1;
7c832835
BH		 2823 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
2824 c->Request.Type.Type = TYPE_CMD; // It is a command.
2825 c->Request.Type.Attribute = ATTR_SIMPLE;
2826 c->Request.Type.Direction =
a52de245 2827 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 2828 c->Request.Timeout = 0; // Don't time out
2829 c->Request.CDB[0] =
00988a35 2830 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 2831 start_blk = blk_rq_pos(creq);
1da177e4 2832#ifdef CCISS_DEBUG
83096ebf
TH		 2833 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
2834 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 2835#endif /* CCISS_DEBUG */
1da177e4 2836
45711f1a 2837 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 2838 seg = blk_rq_map_sg(q, creq, tmp_sg);
2839
7c832835 2840 /* get the DMA records for the setup */
1da177e4
LT		 2841 if (c->Request.Type.Direction == XFER_READ)
2842 dir = PCI_DMA_FROMDEVICE;
2843 else
2844 dir = PCI_DMA_TODEVICE;
2845
7c832835 2846 for (i = 0; i < seg; i++) {
1da177e4 2847 c->SG[i].Len = tmp_sg[i].length;
45711f1a 2848 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 2849 tmp_sg[i].offset,
2850 tmp_sg[i].length, dir);
1da177e4 2851 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 2852 c->SG[i].Addr.upper = temp64.val32.upper;
2853 c->SG[i].Ext = 0; // we are not chaining
1da177e4 2854 }
7c832835
BH		 2855 /* track how many SG entries we are using */
2856 if (seg > h->maxSG)
2857 h->maxSG = seg;
1da177e4
LT		 2858
2859#ifdef CCISS_DEBUG
83096ebf
TH		 2860 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
2861 blk_rq_sectors(creq), seg);
7c832835 2862#endif /* CCISS_DEBUG */
1da177e4
LT		 2863
2864 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 2865 if (likely(blk_fs_request(creq))) {
2866 if(h->cciss_read == CCISS_READ_10) {
2867 c->Request.CDB[1] = 0;
2868 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
2869 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
2870 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
2871 c->Request.CDB[5] = start_blk & 0xff;
2872 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 2873 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
2874 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 2875 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
2876 } else {
582539e5
RD		 2877 u32 upper32 = upper_32_bits(start_blk);
2878
03bbfee5
MMOD		 2879 c->Request.CDBLen = 16;
2880 c->Request.CDB[1]= 0;
582539e5
RD		 2881 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
2882 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
2883 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
2884 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 2885 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
2886 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
2887 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
2888 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 2889 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
2890 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
2891 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
2892 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 2893 c->Request.CDB[14] = c->Request.CDB[15] = 0;
2894 }
2895 } else if (blk_pc_request(creq)) {
2896 c->Request.CDBLen = creq->cmd_len;
2897 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 2898 } else {
03bbfee5
MMOD		 2899 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
2900 BUG();
00988a35 2901 }
1da177e4
LT		 2902
2903 spin_lock_irq(q->queue_lock);
2904
8a3173de 2905 addQ(&h->reqQ, c);
1da177e4 2906 h->Qdepth++;
7c832835
BH		 2907 if (h->Qdepth > h->maxQsinceinit)
2908 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 2909
2910 goto queue;
00988a35 2911full:
1da177e4 2912 blk_stop_queue(q);
00988a35 2913startio:
1da177e4
LT		 2914 /* We will already have the driver lock here so not need
2915 * to lock it.
7c832835 2916 */
1da177e4
LT		 2917 start_io(h);
2918}
2919
3da8b713 2920static inline unsigned long get_next_completion(ctlr_info_t *h)
2921{
2922#ifdef CONFIG_CISS_SCSI_TAPE
2923 /* Any rejects from sendcmd() lying around? Process them first */
2924 if (h->scsi_rejects.ncompletions == 0)
2925 return h->access.command_completed(h);
2926 else {
2927 struct sendcmd_reject_list *srl;
2928 int n;
2929 srl = &h->scsi_rejects;
2930 n = --srl->ncompletions;
2931 /* printk("cciss%d: processing saved reject\n", h->ctlr); */
2932 printk("p");
2933 return srl->complete[n];
2934 }
2935#else
2936 return h->access.command_completed(h);
2937#endif
2938}
2939
2940static inline int interrupt_pending(ctlr_info_t *h)
2941{
2942#ifdef CONFIG_CISS_SCSI_TAPE
7c832835 2943 return (h->access.intr_pending(h)
3da8b713 2944 || (h->scsi_rejects.ncompletions > 0));
2945#else
2946 return h->access.intr_pending(h);
2947#endif
2948}
2949
2950static inline long interrupt_not_for_us(ctlr_info_t *h)
2951{
2952#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 2953 return (((h->access.intr_pending(h) == 0) ||
2954 (h->interrupts_enabled == 0))
2955 && (h->scsi_rejects.ncompletions == 0));
3da8b713 2956#else
7c832835 2957 return (((h->access.intr_pending(h) == 0) ||
3da8b713 2958 (h->interrupts_enabled == 0)));
2959#endif
2960}
2961
7d12e780 2962static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 2963{
2964 ctlr_info_t *h = dev_id;
2965 CommandList_struct *c;
2966 unsigned long flags;
33079b21 2967 __u32 a, a1, a2;
1da177e4 2968
3da8b713 2969 if (interrupt_not_for_us(h))
1da177e4 2970 return IRQ_NONE;
1da177e4
LT		 2971 /*
2972 * If there are completed commands in the completion queue,
2973 * we had better do something about it.
2974 */
2975 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 2976 while (interrupt_pending(h)) {
7c832835 2977 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 2978 a1 = a;
33079b21
MM		 2979 if ((a & 0x04)) {
2980 a2 = (a >> 3);
f880632f 2981 if (a2 >= h->nr_cmds) {
7c832835
BH		 2982 printk(KERN_WARNING
2983 "cciss: controller cciss%d failed, stopping.\n",
2984 h->ctlr);
33079b21
MM		 2985 fail_all_cmds(h->ctlr);
2986 return IRQ_HANDLED;
2987 }
2988
2989 c = h->cmd_pool + a2;
2990 a = c->busaddr;
2991
2992 } else {
8a3173de
JA		 2993 struct hlist_node *tmp;
2994
7c832835 2995 a &= ~3;
8a3173de
JA		 2996 c = NULL;
2997 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
2998 if (c->busaddr == a)
7c832835
BH		 2999 break;
3000 }
33079b21 3001 }
1da177e4
LT		 3002 /*
3003 * If we've found the command, take it off the
3004 * completion Q and free it
3005 */
8a3173de
JA		 3006 if (c && c->busaddr == a) {
3007 removeQ(c);
1da177e4
LT		 3008 if (c->cmd_type == CMD_RWREQ) {
3009 complete_command(h, c, 0);
3010 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3011 complete(c->waiting);
3012 }
3013# ifdef CONFIG_CISS_SCSI_TAPE
3014 else if (c->cmd_type == CMD_SCSI)
3015 complete_scsi_command(c, 0, a1);
3016# endif
3017 continue;
3018 }
3019 }
3020 }
3021
1da177e4
LT		 3022 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3023 return IRQ_HANDLED;
3024}
7c832835 3025
0a9279cc
MM		 3026static int scan_thread(void *data)
3027{
3028 ctlr_info_t *h = data;
3029 int rc;
3030 DECLARE_COMPLETION_ONSTACK(wait);
3031 h->rescan_wait = &wait;
3032
3033 for (;;) {
3034 rc = wait_for_completion_interruptible(&wait);
3035 if (kthread_should_stop())
3036 break;
3037 if (!rc)
3038 rebuild_lun_table(h, 0);
3039 }
3040 return 0;
3041}
3042
3043static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3044{
3045 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3046 return 0;
3047
3048 switch (c->err_info->SenseInfo[12]) {
3049 case STATE_CHANGED:
3050 printk(KERN_WARNING "cciss%d: a state change "
3051 "detected, command retried\n", h->ctlr);
3052 return 1;
3053 break;
3054 case LUN_FAILED:
3055 printk(KERN_WARNING "cciss%d: LUN failure "
3056 "detected, action required\n", h->ctlr);
3057 return 1;
3058 break;
3059 case REPORT_LUNS_CHANGED:
3060 printk(KERN_WARNING "cciss%d: report LUN data "
3061 "changed\n", h->ctlr);
3062 if (h->rescan_wait)
3063 complete(h->rescan_wait);
3064 return 1;
3065 break;
3066 case POWER_OR_RESET:
3067 printk(KERN_WARNING "cciss%d: a power on "
3068 "or device reset detected\n", h->ctlr);
3069 return 1;
3070 break;
3071 case UNIT_ATTENTION_CLEARED:
3072 printk(KERN_WARNING "cciss%d: unit attention "
3073 "cleared by another initiator\n", h->ctlr);
3074 return 1;
3075 break;
3076 default:
3077 printk(KERN_WARNING "cciss%d: unknown "
3078 "unit attention detected\n", h->ctlr);
3079 return 1;
3080 }
3081}
3082
7c832835 3083/*
d14c4ab5 3084 * We cannot read the structure directly, for portability we must use
1da177e4 3085 * the io functions.
7c832835 3086 * This is for debug only.
1da177e4
LT		 3087 */
3088#ifdef CCISS_DEBUG
7c832835 3089static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3090{
3091 int i;
3092 char temp_name[17];
3093
3094 printk("Controller Configuration information\n");
3095 printk("------------------------------------\n");
7c832835 3096 for (i = 0; i < 4; i++)
1da177e4 3097 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3098 temp_name[4] = '\0';
3099 printk(" Signature = %s\n", temp_name);
1da177e4 3100 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3101 printk(" Transport methods supported = 0x%x\n",
3102 readl(&(tb->TransportSupport)));
3103 printk(" Transport methods active = 0x%x\n",
3104 readl(&(tb->TransportActive)));
3105 printk(" Requested transport Method = 0x%x\n",
3106 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3107 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3108 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3109 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3110 readl(&(tb->HostWrite.CoalIntCount)));
3111 printk(" Max outstanding commands = 0x%d\n",
3112 readl(&(tb->CmdsOutMax)));
3113 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3114 for (i = 0; i < 16; i++)
1da177e4
LT		 3115 temp_name[i] = readb(&(tb->ServerName[i]));
3116 temp_name[16] = '\0';
3117 printk(" Server Name = %s\n", temp_name);
7c832835 3118 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3119}
7c832835 3120#endif /* CCISS_DEBUG */
1da177e4 3121
7c832835 3122static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3123{
3124 int i, offset, mem_type, bar_type;
7c832835 3125 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3126 return 0;
3127 offset = 0;
7c832835
BH		 3128 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3129 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3130 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3131 offset += 4;
3132 else {
3133 mem_type = pci_resource_flags(pdev, i) &
7c832835 3134 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3135 switch (mem_type) {
7c832835
BH		 3136 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3137 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3138 offset += 4; /* 32 bit */
3139 break;
3140 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3141 offset += 8;
3142 break;
3143 default: /* reserved in PCI 2.2 */
3144 printk(KERN_WARNING
3145 "Base address is invalid\n");
3146 return -1;
1da177e4
LT		 3147 break;
3148 }
3149 }
7c832835
BH		 3150 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3151 return i + 1;
1da177e4
LT		 3152 }
3153 return -1;
3154}
3155
fb86a35b
MM		 3156/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3157 * controllers that are capable. If not, we use IO-APIC mode.
3158 */
3159
7c832835
BH		 3160static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3161 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3162{
3163#ifdef CONFIG_PCI_MSI
7c832835
BH		 3164 int err;
3165 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3166 {0, 2}, {0, 3}
3167 };
fb86a35b
MM		 3168
3169 /* Some boards advertise MSI but don't really support it */
3170 if ((board_id == 0x40700E11) ||
7c832835
BH		 3171 (board_id == 0x40800E11) ||
3172 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3173 goto default_int_mode;
3174
7c832835
BH		 3175 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3176 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3177 if (!err) {
3178 c->intr[0] = cciss_msix_entries[0].vector;
3179 c->intr[1] = cciss_msix_entries[1].vector;
3180 c->intr[2] = cciss_msix_entries[2].vector;
3181 c->intr[3] = cciss_msix_entries[3].vector;
3182 c->msix_vector = 1;
3183 return;
3184 }
3185 if (err > 0) {
3186 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3187 "available\n", err);
1ecb9c0f 3188 goto default_int_mode;
7c832835
BH		 3189 } else {
3190 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3191 err);
1ecb9c0f 3192 goto default_int_mode;
7c832835
BH		 3193 }
3194 }
3195 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3196 if (!pci_enable_msi(pdev)) {
7c832835 3197 c->msi_vector = 1;
7c832835
BH		 3198 } else {
3199 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3200 }
3201 }
1ecb9c0f 3202default_int_mode:
7c832835 3203#endif /* CONFIG_PCI_MSI */
fb86a35b 3204 /* if we get here we're going to use the default interrupt mode */
7c832835 3205 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3206 return;
3207}
3208
7d1fd970 3209static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3210{
3211 ushort subsystem_vendor_id, subsystem_device_id, command;
3212 __u32 board_id, scratchpad = 0;
3213 __u64 cfg_offset;
3214 __u32 cfg_base_addr;
3215 __u64 cfg_base_addr_index;
c33ac89b 3216 int i, err;
1da177e4
LT		 3217
3218 /* check to see if controller has been disabled */
3219 /* BEFORE trying to enable it */
7c832835
BH		 3220 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3221 if (!(command & 0x02)) {
3222 printk(KERN_WARNING
3223 "cciss: controller appears to be disabled\n");
c33ac89b 3224 return -ENODEV;
1da177e4
LT		 3225 }
3226
c33ac89b 3227 err = pci_enable_device(pdev);
7c832835 3228 if (err) {
1da177e4 3229 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3230 return err;
1da177e4 3231 }
1da177e4 3232
4e570309
BH		 3233 err = pci_request_regions(pdev, "cciss");
3234 if (err) {
3235 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3236 "aborting\n");
872225ca 3237 return err;
4e570309
BH		 3238 }
3239
1da177e4
LT		 3240 subsystem_vendor_id = pdev->subsystem_vendor;
3241 subsystem_device_id = pdev->subsystem_device;
3242 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3243 subsystem_vendor_id);
1da177e4 3244
1da177e4
LT		 3245#ifdef CCISS_DEBUG
3246 printk("command = %x\n", command);
3247 printk("irq = %x\n", pdev->irq);
3248 printk("board_id = %x\n", board_id);
7c832835 3249#endif /* CCISS_DEBUG */
1da177e4 3250
fb86a35b
MM		 3251/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3252 * else we use the IO-APIC interrupt assigned to us by system ROM.
3253 */
3254 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3255
e1438581
MM		 3256 /* find the memory BAR */
3257 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3258 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3259 break;
3260 }
3261 if (i == DEVICE_COUNT_RESOURCE) {
3262 printk(KERN_WARNING "cciss: No memory BAR found\n");
3263 err = -ENODEV;
3264 goto err_out_free_res;
3265 }
3266
3267 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3268 * already removed
3269 */
1da177e4 3270
1da177e4 3271#ifdef CCISS_DEBUG
9f92f471 3272 printk("address 0 = %lx\n", c->paddr);
7c832835 3273#endif /* CCISS_DEBUG */
a5b92873 3274 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3275
3276 /* Wait for the board to become ready. (PCI hotplug needs this.)
3277 * We poll for up to 120 secs, once per 100ms. */
7c832835 3278 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3279 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3280 if (scratchpad == CCISS_FIRMWARE_READY)
3281 break;
3282 set_current_state(TASK_INTERRUPTIBLE);
7c832835 3283 schedule_timeout(HZ / 10); /* wait 100ms */
1da177e4
LT		 3284 }
3285 if (scratchpad != CCISS_FIRMWARE_READY) {
3286 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3287 err = -ENODEV;
4e570309 3288 goto err_out_free_res;
1da177e4
LT		 3289 }
3290
3291 /* get the address index number */
3292 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3293 cfg_base_addr &= (__u32) 0x0000ffff;
3294#ifdef CCISS_DEBUG
3295 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3296#endif /* CCISS_DEBUG */
3297 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3298#ifdef CCISS_DEBUG
9f92f471
RD		 3299 printk("cfg base address index = %llx\n",
3300 (unsigned long long)cfg_base_addr_index);
7c832835 3301#endif /* CCISS_DEBUG */
1da177e4
LT		 3302 if (cfg_base_addr_index == -1) {
3303 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3304 err = -ENODEV;
4e570309 3305 goto err_out_free_res;
1da177e4
LT		 3306 }
3307
3308 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3309#ifdef CCISS_DEBUG
9f92f471 3310 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3311#endif /* CCISS_DEBUG */
3312 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3313 cfg_base_addr_index) +
3314 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3315 c->board_id = board_id;
3316
3317#ifdef CCISS_DEBUG
945f390f 3318 print_cfg_table(c->cfgtable);
7c832835 3319#endif /* CCISS_DEBUG */
1da177e4 3320
49153998
MM		 3321 /* Some controllers support Zero Memory Raid (ZMR).
3322 * When configured in ZMR mode the number of supported
3323 * commands drops to 64. So instead of just setting an
3324 * arbitrary value we make the driver a little smarter.
3325 * We read the config table to tell us how many commands
3326 * are supported on the controller then subtract 4 to
3327 * leave a little room for ioctl calls.
3328 */
3329 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3330 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3331 if (board_id == products[i].board_id) {
3332 c->product_name = products[i].product_name;
3333 c->access = *(products[i].access);
49153998 3334 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3335 break;
3336 }
3337 }
7c832835
BH		 3338 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3339 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3340 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3341 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3342 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3343 err = -ENODEV;
4e570309 3344 goto err_out_free_res;
1da177e4 3345 }
4ff9a9a4
MM		 3346 /* We didn't find the controller in our list. We know the
3347 * signature is valid. If it's an HP device let's try to
3348 * bind to the device and fire it up. Otherwise we bail.
3349 */
3350 if (i == ARRAY_SIZE(products)) {
3351 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3352 c->product_name = products[i-1].product_name;
3353 c->access = *(products[i-1].access);
49153998 3354 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3355 printk(KERN_WARNING "cciss: This is an unknown "
3356 "Smart Array controller.\n"
3357 "cciss: Please update to the latest driver "
3358 "available from www.hp.com.\n");
3359 } else {
3360 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3361 " to access the Smart Array controller %08lx\n"
3362 , (unsigned long)board_id);
3363 err = -ENODEV;
3364 goto err_out_free_res;
3365 }
3366 }
1da177e4 3367#ifdef CONFIG_X86
7c832835
BH		 3368 {
3369 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3370 __u32 prefetch;
3371 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3372 prefetch |= 0x100;
3373 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3374 }
1da177e4
LT		 3375#endif
3376
8bf50f71
MMOD		 3377 /* Disabling DMA prefetch and refetch for the P600.
3378 * An ASIC bug may result in accesses to invalid memory addresses.
3379 * We've disabled prefetch for some time now. Testing with XEN
3380 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3381 */
3382 if(board_id == 0x3225103C) {
3383 __u32 dma_prefetch;
8bf50f71 3384 __u32 dma_refetch;
f92e2f5f
MM		 3385 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3386 dma_prefetch |= 0x8000;
3387 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3388 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3389 dma_refetch |= 0x1;
3390 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3391 }
3392
1da177e4
LT		 3393#ifdef CCISS_DEBUG
3394 printk("Trying to put board into Simple mode\n");
7c832835 3395#endif /* CCISS_DEBUG */
1da177e4 3396 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3397 /* Update the field, and then ring the doorbell */
3398 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3399 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3400
3401 /* under certain very rare conditions, this can take awhile.
3402 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3403 * as we enter this code.) */
7c832835 3404 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3405 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3406 break;
3407 /* delay and try again */
3408 set_current_state(TASK_INTERRUPTIBLE);
3409 schedule_timeout(10);
7c832835 3410 }
1da177e4
LT		 3411
3412#ifdef CCISS_DEBUG
7c832835
BH		 3413 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3414 readl(c->vaddr + SA5_DOORBELL));
3415#endif /* CCISS_DEBUG */
1da177e4 3416#ifdef CCISS_DEBUG
7c832835
BH		 3417 print_cfg_table(c->cfgtable);
3418#endif /* CCISS_DEBUG */
1da177e4 3419
7c832835 3420 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3421 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3422 " simple mode\n");
c33ac89b 3423 err = -ENODEV;
4e570309 3424 goto err_out_free_res;
1da177e4
LT		 3425 }
3426 return 0;
3427
5faad620 3428err_out_free_res:
872225ca
MM		 3429 /*
3430 * Deliberately omit pci_disable_device(): it does something nasty to
3431 * Smart Array controllers that pci_enable_device does not undo
3432 */
4e570309 3433 pci_release_regions(pdev);
c33ac89b 3434 return err;
1da177e4
LT		 3435}
3436
6ae5ce8e
MM		 3437/* Function to find the first free pointer into our hba[] array
3438 * Returns -1 if no free entries are left.
7c832835 3439 */
1da177e4
LT		 3440static int alloc_cciss_hba(void)
3441{
799202cb 3442 int i;
1da177e4 3443
7c832835 3444 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3445 if (!hba[i]) {
3446 ctlr_info_t *p;
f2912a12 3447
06ff37ff 3448 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3449 if (!p)
3450 goto Enomem;
1da177e4
LT		 3451 hba[i] = p;
3452 return i;
3453 }
3454 }
3455 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3456 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3457 return -1;
3458Enomem:
1da177e4 3459 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3460 return -1;
3461}
3462
3463static void free_hba(int i)
3464{
3465 ctlr_info_t *p = hba[i];
3466 int n;
3467
3468 hba[i] = NULL;
799202cb 3469 for (n = 0; n < CISS_MAX_LUN; n++)
1da177e4
LT		 3470 put_disk(p->gendisk[n]);
3471 kfree(p);
3472}
3473
82eb03cf
CC		 3474/* Send a message CDB to the firmware. */
3475static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3476{
3477 typedef struct {
3478 CommandListHeader_struct CommandHeader;
3479 RequestBlock_struct Request;
3480 ErrDescriptor_struct ErrorDescriptor;
3481 } Command;
3482 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3483 Command *cmd;
3484 dma_addr_t paddr64;
3485 uint32_t paddr32, tag;
3486 void __iomem *vaddr;
3487 int i, err;
3488
3489 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3490 if (vaddr == NULL)
3491 return -ENOMEM;
3492
3493 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3494 CCISS commands, so they must be allocated from the lower 4GiB of
3495 memory. */
e930438c 3496 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3497 if (err) {
3498 iounmap(vaddr);
3499 return -ENOMEM;
3500 }
3501
3502 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3503 if (cmd == NULL) {
3504 iounmap(vaddr);
3505 return -ENOMEM;
3506 }
3507
3508 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3509 although there's no guarantee, we assume that the address is at
3510 least 4-byte aligned (most likely, it's page-aligned). */
3511 paddr32 = paddr64;
3512
3513 cmd->CommandHeader.ReplyQueue = 0;
3514 cmd->CommandHeader.SGList = 0;
3515 cmd->CommandHeader.SGTotal = 0;
3516 cmd->CommandHeader.Tag.lower = paddr32;
3517 cmd->CommandHeader.Tag.upper = 0;
3518 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3519
3520 cmd->Request.CDBLen = 16;
3521 cmd->Request.Type.Type = TYPE_MSG;
3522 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3523 cmd->Request.Type.Direction = XFER_NONE;
3524 cmd->Request.Timeout = 0; /* Don't time out */
3525 cmd->Request.CDB[0] = opcode;
3526 cmd->Request.CDB[1] = type;
3527 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3528
3529 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3530 cmd->ErrorDescriptor.Addr.upper = 0;
3531 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3532
3533 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3534
3535 for (i = 0; i < 10; i++) {
3536 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3537 if ((tag & ~3) == paddr32)
3538 break;
3539 schedule_timeout_uninterruptible(HZ);
3540 }
3541
3542 iounmap(vaddr);
3543
3544 /* we leak the DMA buffer here ... no choice since the controller could
3545 still complete the command. */
3546 if (i == 10) {
3547 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3548 opcode, type);
3549 return -ETIMEDOUT;
3550 }
3551
3552 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3553
3554 if (tag & 2) {
3555 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3556 opcode, type);
3557 return -EIO;
3558 }
3559
3560 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
3561 opcode, type);
3562 return 0;
3563}
3564
3565#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
3566#define cciss_noop(p) cciss_message(p, 3, 0)
3567
3568static __devinit int cciss_reset_msi(struct pci_dev *pdev)
3569{
3570/* the #defines are stolen from drivers/pci/msi.h. */
3571#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
3572#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
3573
3574 int pos;
3575 u16 control = 0;
3576
3577 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3578 if (pos) {
3579 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3580 if (control & PCI_MSI_FLAGS_ENABLE) {
3581 printk(KERN_INFO "cciss: resetting MSI\n");
3582 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
3583 }
3584 }
3585
3586 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3587 if (pos) {
3588 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3589 if (control & PCI_MSIX_FLAGS_ENABLE) {
3590 printk(KERN_INFO "cciss: resetting MSI-X\n");
3591 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
3592 }
3593 }
3594
3595 return 0;
3596}
3597
3598/* This does a hard reset of the controller using PCI power management
3599 * states. */
3600static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
3601{
3602 u16 pmcsr, saved_config_space[32];
3603 int i, pos;
3604
3605 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
3606
3607 /* This is very nearly the same thing as
3608
3609 pci_save_state(pci_dev);
3610 pci_set_power_state(pci_dev, PCI_D3hot);
3611 pci_set_power_state(pci_dev, PCI_D0);
3612 pci_restore_state(pci_dev);
3613
3614 but we can't use these nice canned kernel routines on
3615 kexec, because they also check the MSI/MSI-X state in PCI
3616 configuration space and do the wrong thing when it is
3617 set/cleared. Also, the pci_save/restore_state functions
3618 violate the ordering requirements for restoring the
3619 configuration space from the CCISS document (see the
3620 comment below). So we roll our own .... */
3621
3622 for (i = 0; i < 32; i++)
3623 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
3624
3625 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3626 if (pos == 0) {
3627 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
3628 return -ENODEV;
3629 }
3630
3631 /* Quoting from the Open CISS Specification: "The Power
3632 * Management Control/Status Register (CSR) controls the power
3633 * state of the device. The normal operating state is D0,
3634 * CSR=00h. The software off state is D3, CSR=03h. To reset
3635 * the controller, place the interface device in D3 then to
3636 * D0, this causes a secondary PCI reset which will reset the
3637 * controller." */
3638
3639 /* enter the D3hot power management state */
3640 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3641 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3642 pmcsr |= PCI_D3hot;
3643 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3644
3645 schedule_timeout_uninterruptible(HZ >> 1);
3646
3647 /* enter the D0 power management state */
3648 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3649 pmcsr |= PCI_D0;
3650 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3651
3652 schedule_timeout_uninterruptible(HZ >> 1);
3653
3654 /* Restore the PCI configuration space. The Open CISS
3655 * Specification says, "Restore the PCI Configuration
3656 * Registers, offsets 00h through 60h. It is important to
3657 * restore the command register, 16-bits at offset 04h,
3658 * last. Do not restore the configuration status register,
3659 * 16-bits at offset 06h." Note that the offset is 2*i. */
3660 for (i = 0; i < 32; i++) {
3661 if (i == 2 || i == 3)
3662 continue;
3663 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
3664 }
3665 wmb();
3666 pci_write_config_word(pdev, 4, saved_config_space[2]);
3667
3668 return 0;
3669}
3670
1da177e4
LT		 3671/*
3672 * This is it. Find all the controllers and register them. I really hate
3673 * stealing all these major device numbers.
3674 * returns the number of block devices registered.
3675 */
3676static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 3677 const struct pci_device_id *ent)
1da177e4 3678{
1da177e4 3679 int i;
799202cb 3680 int j = 0;
1da177e4 3681 int rc;
22bece00
MM		 3682 int dac, return_code;
3683 InquiryData_struct *inq_buff = NULL;
1da177e4 3684
82eb03cf
CC		 3685 if (reset_devices) {
3686 /* Reset the controller with a PCI power-cycle */
3687 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
3688 return -ENODEV;
3689
5e18cfd0
JA		 3690 /* Now try to get the controller to respond to a no-op. Some
3691 devices (notably the HP Smart Array 5i Controller) need
3692 up to 30 seconds to respond. */
5e4c91c8 3693 for (i=0; i<30; i++) {
82eb03cf
CC		 3694 if (cciss_noop(pdev) == 0)
3695 break;
5e4c91c8
JA		 3696
3697 schedule_timeout_uninterruptible(HZ);
3698 }
3699 if (i == 30) {
3700 printk(KERN_ERR "cciss: controller seems dead\n");
3701 return -EBUSY;
82eb03cf
CC		 3702 }
3703 }
3704
1da177e4 3705 i = alloc_cciss_hba();
7c832835 3706 if (i < 0)
e2019b58 3707 return -1;
1f8ef380
MM		 3708
3709 hba[i]->busy_initializing = 1;
8a3173de
JA		 3710 INIT_HLIST_HEAD(&hba[i]->cmpQ);
3711 INIT_HLIST_HEAD(&hba[i]->reqQ);
1f8ef380 3712
1da177e4
LT		 3713 if (cciss_pci_init(hba[i], pdev) != 0)
3714 goto clean1;
3715
3716 sprintf(hba[i]->devname, "cciss%d", i);
3717 hba[i]->ctlr = i;
3718 hba[i]->pdev = pdev;
3719
3720 /* configure PCI DMA stuff */
6a35528a 3721 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 3722 dac = 1;
284901a9 3723 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 3724 dac = 0;
1da177e4 3725 else {
40aabb58 3726 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 3727 goto clean1;
3728 }
3729
3730 /*
3731 * register with the major number, or get a dynamic major number
3732 * by passing 0 as argument. This is done for greater than
3733 * 8 controller support.
3734 */
3735 if (i < MAX_CTLR_ORIG)
564de74a 3736 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 3737 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 3738 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 3739 printk(KERN_ERR
7c832835
BH		 3740 "cciss: Unable to get major number %d for %s "
3741 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 3742 goto clean1;
7c832835 3743 } else {
1da177e4
LT		 3744 if (i >= MAX_CTLR_ORIG)
3745 hba[i]->major = rc;
3746 }
3747
3748 /* make sure the board interrupts are off */
3749 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 3750 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 3751 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 3752 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 3753 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 3754 goto clean2;
3755 }
40aabb58
BH		 3756
3757 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 3758 hba[i]->devname, pdev->device, pci_name(pdev),
3759 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
3760
3761 hba[i]->cmd_pool_bits =
061837bc
JL		 3762 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
3763 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 3764 hba[i]->cmd_pool = (CommandList_struct *)
3765 pci_alloc_consistent(hba[i]->pdev,
f880632f 3766 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 3767 &(hba[i]->cmd_pool_dhandle));
3768 hba[i]->errinfo_pool = (ErrorInfo_struct *)
3769 pci_alloc_consistent(hba[i]->pdev,
f880632f 3770 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 3771 &(hba[i]->errinfo_pool_dhandle));
3772 if ((hba[i]->cmd_pool_bits == NULL)
3773 || (hba[i]->cmd_pool == NULL)
3774 || (hba[i]->errinfo_pool == NULL)) {
3775 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 3776 goto clean4;
3777 }
3da8b713 3778#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 3779 hba[i]->scsi_rejects.complete =
3780 kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
f880632f 3781 (hba[i]->nr_cmds + 5), GFP_KERNEL);
3da8b713 3782 if (hba[i]->scsi_rejects.complete == NULL) {
7c832835 3783 printk(KERN_ERR "cciss: out of memory");
3da8b713 3784 goto clean4;
3785 }
3786#endif
1da177e4 3787 spin_lock_init(&hba[i]->lock);
1da177e4 3788
7c832835
BH		 3789 /* Initialize the pdev driver private data.
3790 have it point to hba[i]. */
1da177e4 3791 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 3792 /* command and error info recs zeroed out before
3793 they are used */
3794 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 3795 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
3796 * sizeof(unsigned long));
1da177e4 3797
6ae5ce8e
MM		 3798 hba[i]->num_luns = 0;
3799 hba[i]->highest_lun = -1;
3800 for (j = 0; j < CISS_MAX_LUN; j++) {
3801 hba[i]->drv[j].raid_level = -1;
3802 hba[i]->drv[j].queue = NULL;
3803 hba[i]->gendisk[j] = NULL;
3804 }
1da177e4
LT		 3805
3806 cciss_scsi_setup(i);
3807
3808 /* Turn the interrupts on so we can service requests */
3809 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
3810
22bece00
MM		 3811 /* Get the firmware version */
3812 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
3813 if (inq_buff == NULL) {
3814 printk(KERN_ERR "cciss: out of memory\n");
3815 goto clean4;
3816 }
3817
3818 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
3819 sizeof(InquiryData_struct), 0, 0 , 0, TYPE_CMD);
3820 if (return_code == IO_OK) {
3821 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
3822 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
3823 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
3824 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
3825 } else { /* send command failed */
3826 printk(KERN_WARNING "cciss: unable to determine firmware"
3827 " version of controller\n");
3828 }
3829
1da177e4 3830 cciss_procinit(i);
92c4231a
MM		 3831
3832 hba[i]->cciss_max_sectors = 2048;
3833
d6dbf42e 3834 hba[i]->busy_initializing = 0;
1da177e4 3835
6ae5ce8e 3836 rebuild_lun_table(hba[i], 1);
0a9279cc
MM		 3837 hba[i]->cciss_scan_thread = kthread_run(scan_thread, hba[i],
3838 "cciss_scan%02d", i);
3839 if (IS_ERR(hba[i]->cciss_scan_thread))
3840 return PTR_ERR(hba[i]->cciss_scan_thread);
3841
e2019b58 3842 return 1;
1da177e4 3843
6ae5ce8e 3844clean4:
22bece00 3845 kfree(inq_buff);
3da8b713 3846#ifdef CONFIG_CISS_SCSI_TAPE
1acc0b0b 3847 kfree(hba[i]->scsi_rejects.complete);
3da8b713 3848#endif
6044ec88 3849 kfree(hba[i]->cmd_pool_bits);
7c832835 3850 if (hba[i]->cmd_pool)
1da177e4 3851 pci_free_consistent(hba[i]->pdev,
f880632f 3852 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 3853 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3854 if (hba[i]->errinfo_pool)
1da177e4 3855 pci_free_consistent(hba[i]->pdev,
f880632f 3856 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 3857 hba[i]->errinfo_pool,
3858 hba[i]->errinfo_pool_dhandle);
fb86a35b 3859 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 3860clean2:
1da177e4 3861 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 3862clean1:
1f8ef380 3863 hba[i]->busy_initializing = 0;
799202cb
MM		 3864 /* cleanup any queues that may have been initialized */
3865 for (j=0; j <= hba[i]->highest_lun; j++){
3866 drive_info_struct *drv = &(hba[i]->drv[j]);
3867 if (drv->queue)
3868 blk_cleanup_queue(drv->queue);
3869 }
872225ca
MM		 3870 /*
3871 * Deliberately omit pci_disable_device(): it does something nasty to
3872 * Smart Array controllers that pci_enable_device does not undo
3873 */
799202cb 3874 pci_release_regions(pdev);
799202cb 3875 pci_set_drvdata(pdev, NULL);
61808c2b 3876 free_hba(i);
e2019b58 3877 return -1;
1da177e4
LT		 3878}
3879
e9ca75b5 3880static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 3881{
3882 ctlr_info_t *tmp_ptr;
e9ca75b5 3883 int i;
1da177e4 3884 char flush_buf[4];
7c832835 3885 int return_code;
1da177e4 3886
e9ca75b5
GB		 3887 tmp_ptr = pci_get_drvdata(pdev);
3888 if (tmp_ptr == NULL)
3889 return;
3890 i = tmp_ptr->ctlr;
3891 if (hba[i] == NULL)
3892 return;
3893
3894 /* Turn board interrupts off and send the flush cache command */
3895 /* sendcmd will turn off interrupt, and send the flush...
3896 * To write all data in the battery backed cache to disks */
3897 memset(flush_buf, 0, 4);
3898 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
3899 TYPE_CMD);
3900 if (return_code == IO_OK) {
3901 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
3902 } else {
3903 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
3904 }
3905 free_irq(hba[i]->intr[2], hba[i]);
3906}
3907
3908static void __devexit cciss_remove_one(struct pci_dev *pdev)
3909{
3910 ctlr_info_t *tmp_ptr;
3911 int i, j;
3912
7c832835
BH		 3913 if (pci_get_drvdata(pdev) == NULL) {
3914 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 3915 return;
3916 }
0a9279cc 3917
1da177e4
LT		 3918 tmp_ptr = pci_get_drvdata(pdev);
3919 i = tmp_ptr->ctlr;
7c832835 3920 if (hba[i] == NULL) {
1da177e4 3921 printk(KERN_ERR "cciss: device appears to "
7c832835 3922 "already be removed \n");
1da177e4
LT		 3923 return;
3924 }
b6550777 3925
0a9279cc
MM		 3926 kthread_stop(hba[i]->cciss_scan_thread);
3927
b6550777
BH		 3928 remove_proc_entry(hba[i]->devname, proc_cciss);
3929 unregister_blkdev(hba[i]->major, hba[i]->devname);
3930
3931 /* remove it from the disk list */
3932 for (j = 0; j < CISS_MAX_LUN; j++) {
3933 struct gendisk *disk = hba[i]->gendisk[j];
3934 if (disk) {
165125e1 3935 struct request_queue *q = disk->queue;
b6550777
BH		 3936
3937 if (disk->flags & GENHD_FL_UP)
3938 del_gendisk(disk);
3939 if (q)
3940 blk_cleanup_queue(q);
3941 }
3942 }
3943
ba198efb 3944#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 3945 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 3946#endif
b6550777 3947
e9ca75b5 3948 cciss_shutdown(pdev);
fb86a35b
MM		 3949
3950#ifdef CONFIG_PCI_MSI
7c832835
BH		 3951 if (hba[i]->msix_vector)
3952 pci_disable_msix(hba[i]->pdev);
3953 else if (hba[i]->msi_vector)
3954 pci_disable_msi(hba[i]->pdev);
3955#endif /* CONFIG_PCI_MSI */
fb86a35b 3956
1da177e4 3957 iounmap(hba[i]->vaddr);
1da177e4 3958
f880632f 3959 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 3960 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 3961 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 3962 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 3963 kfree(hba[i]->cmd_pool_bits);
3da8b713 3964#ifdef CONFIG_CISS_SCSI_TAPE
3965 kfree(hba[i]->scsi_rejects.complete);
3966#endif
872225ca
MM		 3967 /*
3968 * Deliberately omit pci_disable_device(): it does something nasty to
3969 * Smart Array controllers that pci_enable_device does not undo
3970 */
7c832835 3971 pci_release_regions(pdev);
4e570309 3972 pci_set_drvdata(pdev, NULL);
1da177e4 3973 free_hba(i);
7c832835 3974}
1da177e4
LT		 3975
3976static struct pci_driver cciss_pci_driver = {
7c832835
BH		 3977 .name = "cciss",
3978 .probe = cciss_init_one,
3979 .remove = __devexit_p(cciss_remove_one),
3980 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 3981 .shutdown = cciss_shutdown,
1da177e4
LT		 3982};
3983
3984/*
3985 * This is it. Register the PCI driver information for the cards we control
7c832835 3986 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 3987 */
3988static int __init cciss_init(void)
3989{
10cbda97
JA		 3990 /*
3991 * The hardware requires that commands are aligned on a 64-bit
3992 * boundary. Given that we use pci_alloc_consistent() to allocate an
3993 * array of them, the size must be a multiple of 8 bytes.
3994 */
3995 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
3996
1da177e4
LT		 3997 printk(KERN_INFO DRIVER_NAME "\n");
3998
3999 /* Register for our PCI devices */
9bfab8ce 4000 return pci_register_driver(&cciss_pci_driver);
1da177e4
LT		 4001}
4002
4003static void __exit cciss_cleanup(void)
4004{
4005 int i;
4006
4007 pci_unregister_driver(&cciss_pci_driver);
4008 /* double check that all controller entrys have been removed */
7c832835
BH		 4009 for (i = 0; i < MAX_CTLR; i++) {
4010 if (hba[i] != NULL) {
1da177e4 4011 printk(KERN_WARNING "cciss: had to remove"
7c832835 4012 " controller %d\n", i);
1da177e4
LT		 4013 cciss_remove_one(hba[i]->pdev);
4014 }
4015 }
928b4d8c 4016 remove_proc_entry("driver/cciss", NULL);
1da177e4
LT		 4017}
4018
33079b21
MM		 4019static void fail_all_cmds(unsigned long ctlr)
4020{
4021 /* If we get here, the board is apparently dead. */
4022 ctlr_info_t *h = hba[ctlr];
4023 CommandList_struct *c;
4024 unsigned long flags;
4025
4026 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4027 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4028
4029 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4030
7c832835 4031 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4032
4033 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4034 while (!hlist_empty(&h->reqQ)) {
4035 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4036 removeQ(c);
33079b21 4037 h->Qdepth--;
8a3173de 4038 addQ(&h->cmpQ, c);
33079b21
MM		 4039 }
4040
4041 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4042 while (!hlist_empty(&h->cmpQ)) {
4043 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4044 removeQ(c);
33079b21
MM		 4045 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4046 if (c->cmd_type == CMD_RWREQ) {
4047 complete_command(h, c, 0);
4048 } else if (c->cmd_type == CMD_IOCTL_PEND)
4049 complete(c->waiting);
4050#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4051 else if (c->cmd_type == CMD_SCSI)
4052 complete_scsi_command(c, 0, 0);
33079b21
MM		 4053#endif
4054 }
4055 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4056 return;
4057}
4058
1da177e4
LT		 4059module_init(cciss_init);
4060module_exit(cciss_cleanup);
Linux kernel - Deliverables
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