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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6/mini2440.git] / drivers / block / cciss.c
blob4d4d5e0d3fa64af15faf87a3a78c2a3b0396ef9c
1 /*
2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
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
7 * the Free Software Foundation; version 2 of the License.
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
11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
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
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
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>
36 #include <linux/seq_file.h>
37 #include <linux/init.h>
38 #include <linux/hdreg.h>
39 #include <linux/spinlock.h>
40 #include <linux/compat.h>
41 #include <linux/blktrace_api.h>
42 #include <asm/uaccess.h>
43 #include <asm/io.h>
44
45 #include <linux/dma-mapping.h>
46 #include <linux/blkdev.h>
47 #include <linux/genhd.h>
48 #include <linux/completion.h>
49 #include <scsi/scsi.h>
50 #include <scsi/sg.h>
51 #include <scsi/scsi_ioctl.h>
52 #include <linux/cdrom.h>
53 #include <linux/scatterlist.h>
54 #include <linux/kthread.h>
55
56 #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
57 #define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
58 #define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
59
60 /* Embedded module documentation macros - see modules.h */
61 MODULE_AUTHOR("Hewlett-Packard Company");
62 MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
63 MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
64 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
65 " Smart Array G2 Series SAS/SATA Controllers");
66 MODULE_VERSION("3.6.20");
67 MODULE_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 */
74 static const struct pci_device_id cciss_pci_device_id[] = {
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},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
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},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
102 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
103 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
104 {0,}
105 };
106
107 MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
108
109 /* board_id = Subsystem Device ID & Vendor ID
110 * product = Marketing Name for the board
111 * access = Address of the struct of function pointers
112 */
113 static struct board_type products[] = {
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},
139 {0x324A103C, "Smart Array P712m", &SA5_access},
140 {0x324B103C, "Smart Array P711m", &SA5_access},
141 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
142 };
143
144 /* How long to wait (in milliseconds) for board to go into simple mode */
145 #define MAX_CONFIG_WAIT 30000
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
151 #define MAX_CTLR 32
152
153 /* Originally cciss driver only supports 8 major numbers */
154 #define MAX_CTLR_ORIG 8
155
156 static ctlr_info_t *hba[MAX_CTLR];
157
158 static void do_cciss_request(struct request_queue *q);
159 static irqreturn_t do_cciss_intr(int irq, void *dev_id);
160 static int cciss_open(struct block_device *bdev, fmode_t mode);
161 static int cciss_release(struct gendisk *disk, fmode_t mode);
162 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
163 unsigned int cmd, unsigned long arg);
164 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
165
166 static int cciss_revalidate(struct gendisk *disk);
167 static int rebuild_lun_table(ctlr_info_t *h, int first_time);
168 static int deregister_disk(ctlr_info_t *h, int drv_index,
169 int clear_all);
170
171 static void cciss_read_capacity(int ctlr, int logvol, int withirq,
172 sector_t *total_size, unsigned int *block_size);
173 static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
174 sector_t *total_size, unsigned int *block_size);
175 static void cciss_geometry_inquiry(int ctlr, int logvol,
176 int withirq, sector_t total_size,
177 unsigned int block_size, InquiryData_struct *inq_buff,
178 drive_info_struct *drv);
179 static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
180 __u32);
181 static void start_io(ctlr_info_t *h);
182 static 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);
185 static 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);
188
189 static void fail_all_cmds(unsigned long ctlr);
190 static int scan_thread(void *data);
191 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
192
193 #ifdef CONFIG_PROC_FS
194 static void cciss_procinit(int i);
195 #else
196 static void cciss_procinit(int i)
197 {
198 }
199 #endif /* CONFIG_PROC_FS */
200
201 #ifdef CONFIG_COMPAT
202 static int cciss_compat_ioctl(struct block_device *, fmode_t,
203 unsigned, unsigned long);
204 #endif
205
206 static struct block_device_operations cciss_fops = {
207 .owner = THIS_MODULE,
208 .open = cciss_open,
209 .release = cciss_release,
210 .locked_ioctl = cciss_ioctl,
211 .getgeo = cciss_getgeo,
212 #ifdef CONFIG_COMPAT
213 .compat_ioctl = cciss_compat_ioctl,
214 #endif
215 .revalidate_disk = cciss_revalidate,
216 };
217
218 /*
219 * Enqueuing and dequeuing functions for cmdlists.
220 */
221 static inline void addQ(struct hlist_head *list, CommandList_struct *c)
222 {
223 hlist_add_head(&c->list, list);
224 }
225
226 static inline void removeQ(CommandList_struct *c)
227 {
228 if (WARN_ON(hlist_unhashed(&c->list)))
229 return;
230
231 hlist_del_init(&c->list);
232 }
233
234 #include "cciss_scsi.c" /* For SCSI tape support */
235
236 #define RAID_UNKNOWN 6
237
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)
245 #define ENGAGE_SCSI "engage scsi"
246 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
247 "UNKNOWN"
248 };
249
250 static struct proc_dir_entry *proc_cciss;
251
252 static void cciss_seq_show_header(struct seq_file *seq)
253 {
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 }
279
280 static 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;
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);
292 return ERR_PTR(-EBUSY);
293 }
294 h->busy_configuring = 1;
295 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
296
297 if (*pos == 0)
298 cciss_seq_show_header(seq);
299
300 return pos;
301 }
302
303 static 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
331 static 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
342 static 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;
350
351 h->busy_configuring = 0;
352 }
353
354 static 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
361 static 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
372 static ssize_t
373 cciss_proc_write(struct file *file, const char __user *buf,
374 size_t length, loff_t *ppos)
375 {
376 int err;
377 char *buffer;
378
379 #ifndef CONFIG_CISS_SCSI_TAPE
380 return -EINVAL;
381 #endif
382
383 if (!buf || length > PAGE_SIZE - 1)
384 return -EINVAL;
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
401 rc = cciss_engage_scsi(h->ctlr);
402 if (rc != 0)
403 err = -rc;
404 else
405 err = length;
406 } else
407 #endif /* CONFIG_CISS_SCSI_TAPE */
408 err = -EINVAL;
409 /* might be nice to have "disengage" too, but it's not
410 safely possible. (only 1 module use count, lock issues.) */
411
412 out:
413 free_page((unsigned long)buffer);
414 return err;
415 }
416
417 static 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
426 static void __devinit cciss_procinit(int i)
427 {
428 struct proc_dir_entry *pde;
429
430 if (proc_cciss == NULL)
431 proc_cciss = proc_mkdir("driver/cciss", NULL);
432 if (!proc_cciss)
433 return;
434 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
435 S_IROTH, proc_cciss,
436 &cciss_proc_fops, hba[i]);
437 }
438 #endif /* CONFIG_PROC_FS */
439
440 /*
441 * For operations that cannot sleep, a command block is allocated at init,
442 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
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 */
447 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
448 {
449 CommandList_struct *c;
450 int i;
451 u64bit temp64;
452 dma_addr_t cmd_dma_handle, err_dma_handle;
453
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;
459 memset(c, 0, sizeof(CommandList_struct));
460
461 c->cmdindex = -1;
462
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,
469 sizeof(CommandList_struct), c, cmd_dma_handle);
470 return NULL;
471 }
472 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
473 } else { /* get it out of the controllers pool */
474
475 do {
476 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
477 if (i == h->nr_cmds)
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);
482 #ifdef CCISS_DEBUG
483 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
484 #endif
485 c = h->cmd_pool + i;
486 memset(c, 0, sizeof(CommandList_struct));
487 cmd_dma_handle = h->cmd_pool_dhandle
488 + i * sizeof(CommandList_struct);
489 c->err_info = h->errinfo_pool + i;
490 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
491 err_dma_handle = h->errinfo_pool_dhandle
492 + i * sizeof(ErrorInfo_struct);
493 h->nr_allocs++;
494
495 c->cmdindex = i;
496 }
497
498 INIT_HLIST_NODE(&c->list);
499 c->busaddr = (__u32) cmd_dma_handle;
500 temp64.val = (__u64) err_dma_handle;
501 c->ErrDesc.Addr.lower = temp64.val32.lower;
502 c->ErrDesc.Addr.upper = temp64.val32.upper;
503 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
504
505 c->ctlr = h->ctlr;
506 return c;
507 }
508
509 /*
510 * Frees a command block that was previously allocated with cmd_alloc().
511 */
512 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
513 {
514 int i;
515 u64bit temp64;
516
517 if (!got_from_pool) {
518 temp64.val32.lower = c->ErrDesc.Addr.lower;
519 temp64.val32.upper = c->ErrDesc.Addr.upper;
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 {
525 i = c - h->cmd_pool;
526 clear_bit(i & (BITS_PER_LONG - 1),
527 h->cmd_pool_bits + (i / BITS_PER_LONG));
528 h->nr_frees++;
529 }
530 }
531
532 static inline ctlr_info_t *get_host(struct gendisk *disk)
533 {
534 return disk->queue->queuedata;
535 }
536
537 static 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 */
545 static int cciss_open(struct block_device *bdev, fmode_t mode)
546 {
547 ctlr_info_t *host = get_host(bdev->bd_disk);
548 drive_info_struct *drv = get_drv(bdev->bd_disk);
549
550 #ifdef CCISS_DEBUG
551 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
552 #endif /* CCISS_DEBUG */
553
554 if (host->busy_initializing || drv->busy_configuring)
555 return -EBUSY;
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 */
564 if (drv->heads == 0) {
565 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
566 /* if not node 0 make sure it is a partition = 0 */
567 if (MINOR(bdev->bd_dev) & 0x0f) {
568 return -ENXIO;
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 }
581
582 /*
583 * Close. Sync first.
584 */
585 static int cciss_release(struct gendisk *disk, fmode_t mode)
586 {
587 ctlr_info_t *host = get_host(disk);
588 drive_info_struct *drv = get_drv(disk);
589
590 #ifdef CCISS_DEBUG
591 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
592 #endif /* CCISS_DEBUG */
593
594 drv->usage_count--;
595 host->usage_count--;
596 return 0;
597 }
598
599 #ifdef CONFIG_COMPAT
600
601 static int do_ioctl(struct block_device *bdev, fmode_t mode,
602 unsigned cmd, unsigned long arg)
603 {
604 int ret;
605 lock_kernel();
606 ret = cciss_ioctl(bdev, mode, cmd, arg);
607 unlock_kernel();
608 return ret;
609 }
610
611 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
612 unsigned cmd, unsigned long arg);
613 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
614 unsigned cmd, unsigned long arg);
615
616 static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
617 unsigned cmd, unsigned long arg)
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:
635 return do_ioctl(bdev, mode, cmd, arg);
636
637 case CCISS_PASSTHRU32:
638 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
639 case CCISS_BIG_PASSTHRU32:
640 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
641
642 default:
643 return -ENOIOCTLCMD;
644 }
645 }
646
647 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
648 unsigned cmd, unsigned long arg)
649 {
650 IOCTL32_Command_struct __user *arg32 =
651 (IOCTL32_Command_struct __user *) arg;
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;
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));
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
675 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
676 if (err)
677 return err;
678 err |=
679 copy_in_user(&arg32->error_info, &p->error_info,
680 sizeof(arg32->error_info));
681 if (err)
682 return -EFAULT;
683 return err;
684 }
685
686 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
687 unsigned cmd, unsigned long arg)
688 {
689 BIG_IOCTL32_Command_struct __user *arg32 =
690 (BIG_IOCTL32_Command_struct __user *) arg;
691 BIG_IOCTL_Command_struct arg64;
692 BIG_IOCTL_Command_struct __user *p =
693 compat_alloc_user_space(sizeof(arg64));
694 int err;
695 u32 cp;
696
697 err = 0;
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));
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)
714 return -EFAULT;
715
716 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
717 if (err)
718 return err;
719 err |=
720 copy_in_user(&arg32->error_info, &p->error_info,
721 sizeof(arg32->error_info));
722 if (err)
723 return -EFAULT;
724 return err;
725 }
726 #endif
727
728 static 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
741 static 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 }
747 /*
748 * ioctl
749 */
750 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
751 unsigned int cmd, unsigned long arg)
752 {
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);
761 #endif /* CCISS_DEBUG */
762
763 switch (cmd) {
764 case CCISS_GETPCIINFO:
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 }
779 case CCISS_GETINTINFO:
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 }
793 case CCISS_SETINTINFO:
794 {
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;
830 }
831 case CCISS_GETNODENAME:
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 }
845 case CCISS_SETNODENAME:
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 }
881
882 case CCISS_GETHEARTBEAT:
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 }
894 case CCISS_GETBUSTYPES:
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 }
906 case CCISS_GETFIRMVER:
907 {
908 FirmwareVer_type firmware;
909
910 if (!arg)
911 return -EINVAL;
912 memcpy(firmware, host->firm_ver, 4);
913
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;
922
923 if (!arg)
924 return -EINVAL;
925
926 if (copy_to_user
927 (argp, &DriverVer, sizeof(DriverVer_type)))
928 return -EFAULT;
929 return 0;
930 }
931
932 case CCISS_DEREGDISK:
933 case CCISS_REGNEWD:
934 case CCISS_REVALIDVOLS:
935 return rebuild_lun_table(host, 0);
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 }
948 case CCISS_PASSTHRU:
949 {
950 IOCTL_Command_struct iocommand;
951 CommandList_struct *c;
952 char *buff = NULL;
953 u64bit temp64;
954 unsigned long flags;
955 DECLARE_COMPLETION_ONSTACK(wait);
956
957 if (!arg)
958 return -EINVAL;
959
960 if (!capable(CAP_SYS_RAWIO))
961 return -EPERM;
962
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
1009
1010 // Fill in Request block
1011 c->Request = iocommand.Request;
1012
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
1041 check_ioctl_unit_attention(host, c);
1042
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);
1048 cmd_free(host, c, 0);
1049 return -EFAULT;
1050 }
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;
1064 }
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;
1075 DECLARE_COMPLETION_ONSTACK(wait);
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)) {
1096 status = -EINVAL;
1097 goto cleanup1;
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) {
1111 status = -ENOMEM;
1112 goto cleanup1;
1113 }
1114 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
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) {
1129 status = -ENOMEM;
1130 goto cleanup1;
1131 }
1132 if (ioc->Request.Type.Direction == XFER_WRITE) {
1133 if (copy_from_user
1134 (buff[sg_used], data_ptr, sz)) {
1135 status = -EFAULT;
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;
1155 } else {
1156 c->Header.SGList = 0;
1157 c->Header.SGTotal = 0;
1158 }
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],
1192 PCI_DMA_BIDIRECTIONAL);
1193 }
1194 check_ioctl_unit_attention(host, c);
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];
1213 }
1214 }
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;
1226 }
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:
1239 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
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:
1251 default:
1252 return -ENOTTY;
1253 }
1254 }
1255
1256 static 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 */
1266 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
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 */
1285 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
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 }
1294 }
1295 }
1296 }
1297
1298 static 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 int nr_bytes;
1303 unsigned long flags;
1304 u64bit temp64;
1305 int i, ddir;
1306
1307 if (cmd->Request.Type.Direction == XFER_READ)
1308 ddir = PCI_DMA_FROMDEVICE;
1309 else
1310 ddir = PCI_DMA_TODEVICE;
1311
1312 /* command did not need to be retried */
1313 /* unmap the DMA mapping for all the scatter gather elements */
1314 for (i = 0; i < cmd->Header.SGList; i++) {
1315 temp64.val32.lower = cmd->SG[i].Addr.lower;
1316 temp64.val32.upper = cmd->SG[i].Addr.upper;
1317 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1318 }
1319
1320 #ifdef CCISS_DEBUG
1321 printk("Done with %p\n", rq);
1322 #endif /* CCISS_DEBUG */
1323
1324 /*
1325 * Store the full size and set the residual count for pc requests
1326 */
1327 nr_bytes = blk_rq_bytes(rq);
1328 if (blk_pc_request(rq))
1329 rq->data_len = cmd->err_info->ResidualCnt;
1330
1331 if (blk_end_request(rq, (rq->errors == 0) ? 0 : -EIO, nr_bytes))
1332 BUG();
1333
1334 spin_lock_irqsave(&h->lock, flags);
1335 cmd_free(h, cmd, 1);
1336 cciss_check_queues(h);
1337 spin_unlock_irqrestore(&h->lock, flags);
1338 }
1339
1340 /* This function gets the serial number of a logical drive via
1341 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1342 * number cannot be had, for whatever reason, 16 bytes of 0xff
1343 * are returned instead.
1344 */
1345 static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1346 unsigned char *serial_no, int buflen)
1347 {
1348 #define PAGE_83_INQ_BYTES 64
1349 int rc;
1350 unsigned char *buf;
1351
1352 if (buflen > 16)
1353 buflen = 16;
1354 memset(serial_no, 0xff, buflen);
1355 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1356 if (!buf)
1357 return;
1358 memset(serial_no, 0, buflen);
1359 if (withirq)
1360 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1361 PAGE_83_INQ_BYTES, 1, logvol, 0x83, TYPE_CMD);
1362 else
1363 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
1364 PAGE_83_INQ_BYTES, 1, logvol, 0x83, NULL, TYPE_CMD);
1365 if (rc == IO_OK)
1366 memcpy(serial_no, &buf[8], buflen);
1367 kfree(buf);
1368 return;
1369 }
1370
1371 static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1372 int drv_index)
1373 {
1374 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1375 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1376 disk->major = h->major;
1377 disk->first_minor = drv_index << NWD_SHIFT;
1378 disk->fops = &cciss_fops;
1379 disk->private_data = &h->drv[drv_index];
1380 disk->driverfs_dev = &h->pdev->dev;
1381
1382 /* Set up queue information */
1383 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1384
1385 /* This is a hardware imposed limit. */
1386 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1387
1388 /* This is a limit in the driver and could be eliminated. */
1389 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1390
1391 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1392
1393 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1394
1395 disk->queue->queuedata = h;
1396
1397 blk_queue_hardsect_size(disk->queue,
1398 h->drv[drv_index].block_size);
1399
1400 /* Make sure all queue data is written out before */
1401 /* setting h->drv[drv_index].queue, as setting this */
1402 /* allows the interrupt handler to start the queue */
1403 wmb();
1404 h->drv[drv_index].queue = disk->queue;
1405 add_disk(disk);
1406 }
1407
1408 /* This function will check the usage_count of the drive to be updated/added.
1409 * If the usage_count is zero and it is a heretofore unknown drive, or,
1410 * the drive's capacity, geometry, or serial number has changed,
1411 * then the drive information will be updated and the disk will be
1412 * re-registered with the kernel. If these conditions don't hold,
1413 * then it will be left alone for the next reboot. The exception to this
1414 * is disk 0 which will always be left registered with the kernel since it
1415 * is also the controller node. Any changes to disk 0 will show up on
1416 * the next reboot.
1417 */
1418 static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
1419 {
1420 ctlr_info_t *h = hba[ctlr];
1421 struct gendisk *disk;
1422 InquiryData_struct *inq_buff = NULL;
1423 unsigned int block_size;
1424 sector_t total_size;
1425 unsigned long flags = 0;
1426 int ret = 0;
1427 drive_info_struct *drvinfo;
1428 int was_only_controller_node;
1429
1430 /* Get information about the disk and modify the driver structure */
1431 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1432 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1433 if (inq_buff == NULL || drvinfo == NULL)
1434 goto mem_msg;
1435
1436 /* See if we're trying to update the "controller node"
1437 * this will happen the when the first logical drive gets
1438 * created by ACU.
1439 */
1440 was_only_controller_node = (drv_index == 0 &&
1441 h->drv[0].raid_level == -1);
1442
1443 /* testing to see if 16-byte CDBs are already being used */
1444 if (h->cciss_read == CCISS_READ_16) {
1445 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1446 &total_size, &block_size);
1447
1448 } else {
1449 cciss_read_capacity(ctlr, drv_index, 1,
1450 &total_size, &block_size);
1451
1452 /* if read_capacity returns all F's this volume is >2TB */
1453 /* in size so we switch to 16-byte CDB's for all */
1454 /* read/write ops */
1455 if (total_size == 0xFFFFFFFFULL) {
1456 cciss_read_capacity_16(ctlr, drv_index, 1,
1457 &total_size, &block_size);
1458 h->cciss_read = CCISS_READ_16;
1459 h->cciss_write = CCISS_WRITE_16;
1460 } else {
1461 h->cciss_read = CCISS_READ_10;
1462 h->cciss_write = CCISS_WRITE_10;
1463 }
1464 }
1465
1466 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1467 inq_buff, drvinfo);
1468 drvinfo->block_size = block_size;
1469 drvinfo->nr_blocks = total_size + 1;
1470
1471 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1472 sizeof(drvinfo->serial_no));
1473
1474 /* Is it the same disk we already know, and nothing's changed? */
1475 if (h->drv[drv_index].raid_level != -1 &&
1476 ((memcmp(drvinfo->serial_no,
1477 h->drv[drv_index].serial_no, 16) == 0) &&
1478 drvinfo->block_size == h->drv[drv_index].block_size &&
1479 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1480 drvinfo->heads == h->drv[drv_index].heads &&
1481 drvinfo->sectors == h->drv[drv_index].sectors &&
1482 drvinfo->cylinders == h->drv[drv_index].cylinders))
1483 /* The disk is unchanged, nothing to update */
1484 goto freeret;
1485
1486 /* If we get here it's not the same disk, or something's changed,
1487 * so we need to * deregister it, and re-register it, if it's not
1488 * in use.
1489 * If the disk already exists then deregister it before proceeding
1490 * (unless it's the first disk (for the controller node).
1491 */
1492 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1493 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
1494 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1495 h->drv[drv_index].busy_configuring = 1;
1496 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1497
1498 /* deregister_disk sets h->drv[drv_index].queue = NULL
1499 * which keeps the interrupt handler from starting
1500 * the queue.
1501 */
1502 ret = deregister_disk(h, drv_index, 0);
1503 h->drv[drv_index].busy_configuring = 0;
1504 }
1505
1506 /* If the disk is in use return */
1507 if (ret)
1508 goto freeret;
1509
1510 /* Save the new information from cciss_geometry_inquiry
1511 * and serial number inquiry.
1512 */
1513 h->drv[drv_index].block_size = drvinfo->block_size;
1514 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1515 h->drv[drv_index].heads = drvinfo->heads;
1516 h->drv[drv_index].sectors = drvinfo->sectors;
1517 h->drv[drv_index].cylinders = drvinfo->cylinders;
1518 h->drv[drv_index].raid_level = drvinfo->raid_level;
1519 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
1520
1521 ++h->num_luns;
1522 disk = h->gendisk[drv_index];
1523 set_capacity(disk, h->drv[drv_index].nr_blocks);
1524
1525 /* If it's not disk 0 (drv_index != 0)
1526 * or if it was disk 0, but there was previously
1527 * no actual corresponding configured logical drive
1528 * (raid_leve == -1) then we want to update the
1529 * logical drive's information.
1530 */
1531 if (drv_index || first_time)
1532 cciss_add_disk(h, disk, drv_index);
1533
1534 freeret:
1535 kfree(inq_buff);
1536 kfree(drvinfo);
1537 return;
1538 mem_msg:
1539 printk(KERN_ERR "cciss: out of memory\n");
1540 goto freeret;
1541 }
1542
1543 /* This function will find the first index of the controllers drive array
1544 * that has a -1 for the raid_level and will return that index. This is
1545 * where new drives will be added. If the index to be returned is greater
1546 * than the highest_lun index for the controller then highest_lun is set
1547 * to this new index. If there are no available indexes then -1 is returned.
1548 * "controller_node" is used to know if this is a real logical drive, or just
1549 * the controller node, which determines if this counts towards highest_lun.
1550 */
1551 static int cciss_find_free_drive_index(int ctlr, int controller_node)
1552 {
1553 int i;
1554
1555 for (i = 0; i < CISS_MAX_LUN; i++) {
1556 if (hba[ctlr]->drv[i].raid_level == -1) {
1557 if (i > hba[ctlr]->highest_lun)
1558 if (!controller_node)
1559 hba[ctlr]->highest_lun = i;
1560 return i;
1561 }
1562 }
1563 return -1;
1564 }
1565
1566 /* cciss_add_gendisk finds a free hba[]->drv structure
1567 * and allocates a gendisk if needed, and sets the lunid
1568 * in the drvinfo structure. It returns the index into
1569 * the ->drv[] array, or -1 if none are free.
1570 * is_controller_node indicates whether highest_lun should
1571 * count this disk, or if it's only being added to provide
1572 * a means to talk to the controller in case no logical
1573 * drives have yet been configured.
1574 */
1575 static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
1576 {
1577 int drv_index;
1578
1579 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
1580 if (drv_index == -1)
1581 return -1;
1582 /*Check if the gendisk needs to be allocated */
1583 if (!h->gendisk[drv_index]) {
1584 h->gendisk[drv_index] =
1585 alloc_disk(1 << NWD_SHIFT);
1586 if (!h->gendisk[drv_index]) {
1587 printk(KERN_ERR "cciss%d: could not "
1588 "allocate a new disk %d\n",
1589 h->ctlr, drv_index);
1590 return -1;
1591 }
1592 }
1593 h->drv[drv_index].LunID = lunid;
1594
1595 /* Don't need to mark this busy because nobody */
1596 /* else knows about this disk yet to contend */
1597 /* for access to it. */
1598 h->drv[drv_index].busy_configuring = 0;
1599 wmb();
1600 return drv_index;
1601 }
1602
1603 /* This is for the special case of a controller which
1604 * has no logical drives. In this case, we still need
1605 * to register a disk so the controller can be accessed
1606 * by the Array Config Utility.
1607 */
1608 static void cciss_add_controller_node(ctlr_info_t *h)
1609 {
1610 struct gendisk *disk;
1611 int drv_index;
1612
1613 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1614 return;
1615
1616 drv_index = cciss_add_gendisk(h, 0, 1);
1617 if (drv_index == -1) {
1618 printk(KERN_WARNING "cciss%d: could not "
1619 "add disk 0.\n", h->ctlr);
1620 return;
1621 }
1622 h->drv[drv_index].block_size = 512;
1623 h->drv[drv_index].nr_blocks = 0;
1624 h->drv[drv_index].heads = 0;
1625 h->drv[drv_index].sectors = 0;
1626 h->drv[drv_index].cylinders = 0;
1627 h->drv[drv_index].raid_level = -1;
1628 memset(h->drv[drv_index].serial_no, 0, 16);
1629 disk = h->gendisk[drv_index];
1630 cciss_add_disk(h, disk, drv_index);
1631 }
1632
1633 /* This function will add and remove logical drives from the Logical
1634 * drive array of the controller and maintain persistency of ordering
1635 * so that mount points are preserved until the next reboot. This allows
1636 * for the removal of logical drives in the middle of the drive array
1637 * without a re-ordering of those drives.
1638 * INPUT
1639 * h = The controller to perform the operations on
1640 */
1641 static int rebuild_lun_table(ctlr_info_t *h, int first_time)
1642 {
1643 int ctlr = h->ctlr;
1644 int num_luns;
1645 ReportLunData_struct *ld_buff = NULL;
1646 int return_code;
1647 int listlength = 0;
1648 int i;
1649 int drv_found;
1650 int drv_index = 0;
1651 __u32 lunid = 0;
1652 unsigned long flags;
1653
1654 if (!capable(CAP_SYS_RAWIO))
1655 return -EPERM;
1656
1657 /* Set busy_configuring flag for this operation */
1658 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1659 if (h->busy_configuring) {
1660 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1661 return -EBUSY;
1662 }
1663 h->busy_configuring = 1;
1664 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1665
1666 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
1667 if (ld_buff == NULL)
1668 goto mem_msg;
1669
1670 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
1671 sizeof(ReportLunData_struct), 0,
1672 0, 0, TYPE_CMD);
1673
1674 if (return_code == IO_OK)
1675 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
1676 else { /* reading number of logical volumes failed */
1677 printk(KERN_WARNING "cciss: report logical volume"
1678 " command failed\n");
1679 listlength = 0;
1680 goto freeret;
1681 }
1682
1683 num_luns = listlength / 8; /* 8 bytes per entry */
1684 if (num_luns > CISS_MAX_LUN) {
1685 num_luns = CISS_MAX_LUN;
1686 printk(KERN_WARNING "cciss: more luns configured"
1687 " on controller than can be handled by"
1688 " this driver.\n");
1689 }
1690
1691 if (num_luns == 0)
1692 cciss_add_controller_node(h);
1693
1694 /* Compare controller drive array to driver's drive array
1695 * to see if any drives are missing on the controller due
1696 * to action of Array Config Utility (user deletes drive)
1697 * and deregister logical drives which have disappeared.
1698 */
1699 for (i = 0; i <= h->highest_lun; i++) {
1700 int j;
1701 drv_found = 0;
1702
1703 /* skip holes in the array from already deleted drives */
1704 if (h->drv[i].raid_level == -1)
1705 continue;
1706
1707 for (j = 0; j < num_luns; j++) {
1708 memcpy(&lunid, &ld_buff->LUN[j][0], 4);
1709 lunid = le32_to_cpu(lunid);
1710 if (h->drv[i].LunID == lunid) {
1711 drv_found = 1;
1712 break;
1713 }
1714 }
1715 if (!drv_found) {
1716 /* Deregister it from the OS, it's gone. */
1717 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1718 h->drv[i].busy_configuring = 1;
1719 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1720 return_code = deregister_disk(h, i, 1);
1721 h->drv[i].busy_configuring = 0;
1722 }
1723 }
1724
1725 /* Compare controller drive array to driver's drive array.
1726 * Check for updates in the drive information and any new drives
1727 * on the controller due to ACU adding logical drives, or changing
1728 * a logical drive's size, etc. Reregister any new/changed drives
1729 */
1730 for (i = 0; i < num_luns; i++) {
1731 int j;
1732
1733 drv_found = 0;
1734
1735 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
1736 lunid = le32_to_cpu(lunid);
1737
1738 /* Find if the LUN is already in the drive array
1739 * of the driver. If so then update its info
1740 * if not in use. If it does not exist then find
1741 * the first free index and add it.
1742 */
1743 for (j = 0; j <= h->highest_lun; j++) {
1744 if (h->drv[j].raid_level != -1 &&
1745 h->drv[j].LunID == lunid) {
1746 drv_index = j;
1747 drv_found = 1;
1748 break;
1749 }
1750 }
1751
1752 /* check if the drive was found already in the array */
1753 if (!drv_found) {
1754 drv_index = cciss_add_gendisk(h, lunid, 0);
1755 if (drv_index == -1)
1756 goto freeret;
1757 }
1758 cciss_update_drive_info(ctlr, drv_index, first_time);
1759 } /* end for */
1760
1761 freeret:
1762 kfree(ld_buff);
1763 h->busy_configuring = 0;
1764 /* We return -1 here to tell the ACU that we have registered/updated
1765 * all of the drives that we can and to keep it from calling us
1766 * additional times.
1767 */
1768 return -1;
1769 mem_msg:
1770 printk(KERN_ERR "cciss: out of memory\n");
1771 h->busy_configuring = 0;
1772 goto freeret;
1773 }
1774
1775 /* This function will deregister the disk and it's queue from the
1776 * kernel. It must be called with the controller lock held and the
1777 * drv structures busy_configuring flag set. It's parameters are:
1778 *
1779 * disk = This is the disk to be deregistered
1780 * drv = This is the drive_info_struct associated with the disk to be
1781 * deregistered. It contains information about the disk used
1782 * by the driver.
1783 * clear_all = This flag determines whether or not the disk information
1784 * is going to be completely cleared out and the highest_lun
1785 * reset. Sometimes we want to clear out information about
1786 * the disk in preparation for re-adding it. In this case
1787 * the highest_lun should be left unchanged and the LunID
1788 * should not be cleared.
1789 */
1790 static int deregister_disk(ctlr_info_t *h, int drv_index,
1791 int clear_all)
1792 {
1793 int i;
1794 struct gendisk *disk;
1795 drive_info_struct *drv;
1796
1797 if (!capable(CAP_SYS_RAWIO))
1798 return -EPERM;
1799
1800 drv = &h->drv[drv_index];
1801 disk = h->gendisk[drv_index];
1802
1803 /* make sure logical volume is NOT is use */
1804 if (clear_all || (h->gendisk[0] == disk)) {
1805 if (drv->usage_count > 1)
1806 return -EBUSY;
1807 } else if (drv->usage_count > 0)
1808 return -EBUSY;
1809
1810 /* invalidate the devices and deregister the disk. If it is disk
1811 * zero do not deregister it but just zero out it's values. This
1812 * allows us to delete disk zero but keep the controller registered.
1813 */
1814 if (h->gendisk[0] != disk) {
1815 struct request_queue *q = disk->queue;
1816 if (disk->flags & GENHD_FL_UP)
1817 del_gendisk(disk);
1818 if (q) {
1819 blk_cleanup_queue(q);
1820 /* Set drv->queue to NULL so that we do not try
1821 * to call blk_start_queue on this queue in the
1822 * interrupt handler
1823 */
1824 drv->queue = NULL;
1825 }
1826 /* If clear_all is set then we are deleting the logical
1827 * drive, not just refreshing its info. For drives
1828 * other than disk 0 we will call put_disk. We do not
1829 * do this for disk 0 as we need it to be able to
1830 * configure the controller.
1831 */
1832 if (clear_all){
1833 /* This isn't pretty, but we need to find the
1834 * disk in our array and NULL our the pointer.
1835 * This is so that we will call alloc_disk if
1836 * this index is used again later.
1837 */
1838 for (i=0; i < CISS_MAX_LUN; i++){
1839 if (h->gendisk[i] == disk) {
1840 h->gendisk[i] = NULL;
1841 break;
1842 }
1843 }
1844 put_disk(disk);
1845 }
1846 } else {
1847 set_capacity(disk, 0);
1848 }
1849
1850 --h->num_luns;
1851 /* zero out the disk size info */
1852 drv->nr_blocks = 0;
1853 drv->block_size = 0;
1854 drv->heads = 0;
1855 drv->sectors = 0;
1856 drv->cylinders = 0;
1857 drv->raid_level = -1; /* This can be used as a flag variable to
1858 * indicate that this element of the drive
1859 * array is free.
1860 */
1861
1862 if (clear_all) {
1863 /* check to see if it was the last disk */
1864 if (drv == h->drv + h->highest_lun) {
1865 /* if so, find the new hightest lun */
1866 int i, newhighest = -1;
1867 for (i = 0; i <= h->highest_lun; i++) {
1868 /* if the disk has size > 0, it is available */
1869 if (h->drv[i].heads)
1870 newhighest = i;
1871 }
1872 h->highest_lun = newhighest;
1873 }
1874
1875 drv->LunID = 0;
1876 }
1877 return 0;
1878 }
1879
1880 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num, /* 0: address the controller,
1881 1: address logical volume log_unit,
1882 2: periph device address is scsi3addr */
1883 unsigned int log_unit, __u8 page_code,
1884 unsigned char *scsi3addr, int cmd_type)
1885 {
1886 ctlr_info_t *h = hba[ctlr];
1887 u64bit buff_dma_handle;
1888 int status = IO_OK;
1889
1890 c->cmd_type = CMD_IOCTL_PEND;
1891 c->Header.ReplyQueue = 0;
1892 if (buff != NULL) {
1893 c->Header.SGList = 1;
1894 c->Header.SGTotal = 1;
1895 } else {
1896 c->Header.SGList = 0;
1897 c->Header.SGTotal = 0;
1898 }
1899 c->Header.Tag.lower = c->busaddr;
1900
1901 c->Request.Type.Type = cmd_type;
1902 if (cmd_type == TYPE_CMD) {
1903 switch (cmd) {
1904 case CISS_INQUIRY:
1905 /* If the logical unit number is 0 then, this is going
1906 to controller so It's a physical command
1907 mode = 0 target = 0. So we have nothing to write.
1908 otherwise, if use_unit_num == 1,
1909 mode = 1(volume set addressing) target = LUNID
1910 otherwise, if use_unit_num == 2,
1911 mode = 0(periph dev addr) target = scsi3addr */
1912 if (use_unit_num == 1) {
1913 c->Header.LUN.LogDev.VolId =
1914 h->drv[log_unit].LunID;
1915 c->Header.LUN.LogDev.Mode = 1;
1916 } else if (use_unit_num == 2) {
1917 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr,
1918 8);
1919 c->Header.LUN.LogDev.Mode = 0;
1920 }
1921 /* are we trying to read a vital product page */
1922 if (page_code != 0) {
1923 c->Request.CDB[1] = 0x01;
1924 c->Request.CDB[2] = page_code;
1925 }
1926 c->Request.CDBLen = 6;
1927 c->Request.Type.Attribute = ATTR_SIMPLE;
1928 c->Request.Type.Direction = XFER_READ;
1929 c->Request.Timeout = 0;
1930 c->Request.CDB[0] = CISS_INQUIRY;
1931 c->Request.CDB[4] = size & 0xFF;
1932 break;
1933 case CISS_REPORT_LOG:
1934 case CISS_REPORT_PHYS:
1935 /* Talking to controller so It's a physical command
1936 mode = 00 target = 0. Nothing to write.
1937 */
1938 c->Request.CDBLen = 12;
1939 c->Request.Type.Attribute = ATTR_SIMPLE;
1940 c->Request.Type.Direction = XFER_READ;
1941 c->Request.Timeout = 0;
1942 c->Request.CDB[0] = cmd;
1943 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1944 c->Request.CDB[7] = (size >> 16) & 0xFF;
1945 c->Request.CDB[8] = (size >> 8) & 0xFF;
1946 c->Request.CDB[9] = size & 0xFF;
1947 break;
1948
1949 case CCISS_READ_CAPACITY:
1950 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1951 c->Header.LUN.LogDev.Mode = 1;
1952 c->Request.CDBLen = 10;
1953 c->Request.Type.Attribute = ATTR_SIMPLE;
1954 c->Request.Type.Direction = XFER_READ;
1955 c->Request.Timeout = 0;
1956 c->Request.CDB[0] = cmd;
1957 break;
1958 case CCISS_READ_CAPACITY_16:
1959 c->Header.LUN.LogDev.VolId = h->drv[log_unit].LunID;
1960 c->Header.LUN.LogDev.Mode = 1;
1961 c->Request.CDBLen = 16;
1962 c->Request.Type.Attribute = ATTR_SIMPLE;
1963 c->Request.Type.Direction = XFER_READ;
1964 c->Request.Timeout = 0;
1965 c->Request.CDB[0] = cmd;
1966 c->Request.CDB[1] = 0x10;
1967 c->Request.CDB[10] = (size >> 24) & 0xFF;
1968 c->Request.CDB[11] = (size >> 16) & 0xFF;
1969 c->Request.CDB[12] = (size >> 8) & 0xFF;
1970 c->Request.CDB[13] = size & 0xFF;
1971 c->Request.Timeout = 0;
1972 c->Request.CDB[0] = cmd;
1973 break;
1974 case CCISS_CACHE_FLUSH:
1975 c->Request.CDBLen = 12;
1976 c->Request.Type.Attribute = ATTR_SIMPLE;
1977 c->Request.Type.Direction = XFER_WRITE;
1978 c->Request.Timeout = 0;
1979 c->Request.CDB[0] = BMIC_WRITE;
1980 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
1981 break;
1982 default:
1983 printk(KERN_WARNING
1984 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
1985 return IO_ERROR;
1986 }
1987 } else if (cmd_type == TYPE_MSG) {
1988 switch (cmd) {
1989 case 0: /* ABORT message */
1990 c->Request.CDBLen = 12;
1991 c->Request.Type.Attribute = ATTR_SIMPLE;
1992 c->Request.Type.Direction = XFER_WRITE;
1993 c->Request.Timeout = 0;
1994 c->Request.CDB[0] = cmd; /* abort */
1995 c->Request.CDB[1] = 0; /* abort a command */
1996 /* buff contains the tag of the command to abort */
1997 memcpy(&c->Request.CDB[4], buff, 8);
1998 break;
1999 case 1: /* RESET message */
2000 c->Request.CDBLen = 12;
2001 c->Request.Type.Attribute = ATTR_SIMPLE;
2002 c->Request.Type.Direction = XFER_WRITE;
2003 c->Request.Timeout = 0;
2004 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
2005 c->Request.CDB[0] = cmd; /* reset */
2006 c->Request.CDB[1] = 0x04; /* reset a LUN */
2007 break;
2008 case 3: /* No-Op message */
2009 c->Request.CDBLen = 1;
2010 c->Request.Type.Attribute = ATTR_SIMPLE;
2011 c->Request.Type.Direction = XFER_WRITE;
2012 c->Request.Timeout = 0;
2013 c->Request.CDB[0] = cmd;
2014 break;
2015 default:
2016 printk(KERN_WARNING
2017 "cciss%d: unknown message type %d\n", ctlr, cmd);
2018 return IO_ERROR;
2019 }
2020 } else {
2021 printk(KERN_WARNING
2022 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
2023 return IO_ERROR;
2024 }
2025 /* Fill in the scatter gather information */
2026 if (size > 0) {
2027 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
2028 buff, size,
2029 PCI_DMA_BIDIRECTIONAL);
2030 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2031 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2032 c->SG[0].Len = size;
2033 c->SG[0].Ext = 0; /* we are not chaining */
2034 }
2035 return status;
2036 }
2037
2038 static int sendcmd_withirq(__u8 cmd,
2039 int ctlr,
2040 void *buff,
2041 size_t size,
2042 unsigned int use_unit_num,
2043 unsigned int log_unit, __u8 page_code, int cmd_type)
2044 {
2045 ctlr_info_t *h = hba[ctlr];
2046 CommandList_struct *c;
2047 u64bit buff_dma_handle;
2048 unsigned long flags;
2049 int return_status;
2050 DECLARE_COMPLETION_ONSTACK(wait);
2051
2052 if ((c = cmd_alloc(h, 0)) == NULL)
2053 return -ENOMEM;
2054 return_status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
2055 log_unit, page_code, NULL, cmd_type);
2056 if (return_status != IO_OK) {
2057 cmd_free(h, c, 0);
2058 return return_status;
2059 }
2060 resend_cmd2:
2061 c->waiting = &wait;
2062
2063 /* Put the request on the tail of the queue and send it */
2064 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
2065 addQ(&h->reqQ, c);
2066 h->Qdepth++;
2067 start_io(h);
2068 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
2069
2070 wait_for_completion(&wait);
2071
2072 if (c->err_info->CommandStatus != 0) { /* an error has occurred */
2073 switch (c->err_info->CommandStatus) {
2074 case CMD_TARGET_STATUS:
2075 printk(KERN_WARNING "cciss: cmd %p has "
2076 " completed with errors\n", c);
2077 if (c->err_info->ScsiStatus) {
2078 printk(KERN_WARNING "cciss: cmd %p "
2079 "has SCSI Status = %x\n",
2080 c, c->err_info->ScsiStatus);
2081 }
2082
2083 break;
2084 case CMD_DATA_UNDERRUN:
2085 case CMD_DATA_OVERRUN:
2086 /* expected for inquire and report lun commands */
2087 break;
2088 case CMD_INVALID:
2089 printk(KERN_WARNING "cciss: Cmd %p is "
2090 "reported invalid\n", c);
2091 return_status = IO_ERROR;
2092 break;
2093 case CMD_PROTOCOL_ERR:
2094 printk(KERN_WARNING "cciss: cmd %p has "
2095 "protocol error \n", c);
2096 return_status = IO_ERROR;
2097 break;
2098 case CMD_HARDWARE_ERR:
2099 printk(KERN_WARNING "cciss: cmd %p had "
2100 " hardware error\n", c);
2101 return_status = IO_ERROR;
2102 break;
2103 case CMD_CONNECTION_LOST:
2104 printk(KERN_WARNING "cciss: cmd %p had "
2105 "connection lost\n", c);
2106 return_status = IO_ERROR;
2107 break;
2108 case CMD_ABORTED:
2109 printk(KERN_WARNING "cciss: cmd %p was "
2110 "aborted\n", c);
2111 return_status = IO_ERROR;
2112 break;
2113 case CMD_ABORT_FAILED:
2114 printk(KERN_WARNING "cciss: cmd %p reports "
2115 "abort failed\n", c);
2116 return_status = IO_ERROR;
2117 break;
2118 case CMD_UNSOLICITED_ABORT:
2119 printk(KERN_WARNING
2120 "cciss%d: unsolicited abort %p\n", ctlr, c);
2121 if (c->retry_count < MAX_CMD_RETRIES) {
2122 printk(KERN_WARNING
2123 "cciss%d: retrying %p\n", ctlr, c);
2124 c->retry_count++;
2125 /* erase the old error information */
2126 memset(c->err_info, 0,
2127 sizeof(ErrorInfo_struct));
2128 return_status = IO_OK;
2129 INIT_COMPLETION(wait);
2130 goto resend_cmd2;
2131 }
2132 return_status = IO_ERROR;
2133 break;
2134 default:
2135 printk(KERN_WARNING "cciss: cmd %p returned "
2136 "unknown status %x\n", c,
2137 c->err_info->CommandStatus);
2138 return_status = IO_ERROR;
2139 }
2140 }
2141 /* unlock the buffers from DMA */
2142 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2143 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2144 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2145 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2146 cmd_free(h, c, 0);
2147 return return_status;
2148 }
2149
2150 static void cciss_geometry_inquiry(int ctlr, int logvol,
2151 int withirq, sector_t total_size,
2152 unsigned int block_size,
2153 InquiryData_struct *inq_buff,
2154 drive_info_struct *drv)
2155 {
2156 int return_code;
2157 unsigned long t;
2158
2159 memset(inq_buff, 0, sizeof(InquiryData_struct));
2160 if (withirq)
2161 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
2162 inq_buff, sizeof(*inq_buff), 1,
2163 logvol, 0xC1, TYPE_CMD);
2164 else
2165 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
2166 sizeof(*inq_buff), 1, logvol, 0xC1, NULL,
2167 TYPE_CMD);
2168 if (return_code == IO_OK) {
2169 if (inq_buff->data_byte[8] == 0xFF) {
2170 printk(KERN_WARNING
2171 "cciss: reading geometry failed, volume "
2172 "does not support reading geometry\n");
2173 drv->heads = 255;
2174 drv->sectors = 32; // Sectors per track
2175 drv->cylinders = total_size + 1;
2176 drv->raid_level = RAID_UNKNOWN;
2177 } else {
2178 drv->heads = inq_buff->data_byte[6];
2179 drv->sectors = inq_buff->data_byte[7];
2180 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2181 drv->cylinders += inq_buff->data_byte[5];
2182 drv->raid_level = inq_buff->data_byte[8];
2183 }
2184 drv->block_size = block_size;
2185 drv->nr_blocks = total_size + 1;
2186 t = drv->heads * drv->sectors;
2187 if (t > 1) {
2188 sector_t real_size = total_size + 1;
2189 unsigned long rem = sector_div(real_size, t);
2190 if (rem)
2191 real_size++;
2192 drv->cylinders = real_size;
2193 }
2194 } else { /* Get geometry failed */
2195 printk(KERN_WARNING "cciss: reading geometry failed\n");
2196 }
2197 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
2198 drv->heads, drv->sectors, drv->cylinders);
2199 }
2200
2201 static void
2202 cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
2203 unsigned int *block_size)
2204 {
2205 ReadCapdata_struct *buf;
2206 int return_code;
2207
2208 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2209 if (!buf) {
2210 printk(KERN_WARNING "cciss: out of memory\n");
2211 return;
2212 }
2213
2214 if (withirq)
2215 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
2216 ctlr, buf, sizeof(ReadCapdata_struct),
2217 1, logvol, 0, TYPE_CMD);
2218 else
2219 return_code = sendcmd(CCISS_READ_CAPACITY,
2220 ctlr, buf, sizeof(ReadCapdata_struct),
2221 1, logvol, 0, NULL, TYPE_CMD);
2222 if (return_code == IO_OK) {
2223 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2224 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2225 } else { /* read capacity command failed */
2226 printk(KERN_WARNING "cciss: read capacity failed\n");
2227 *total_size = 0;
2228 *block_size = BLOCK_SIZE;
2229 }
2230 if (*total_size != 0)
2231 printk(KERN_INFO " blocks= %llu block_size= %d\n",
2232 (unsigned long long)*total_size+1, *block_size);
2233 kfree(buf);
2234 }
2235
2236 static void
2237 cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2238 {
2239 ReadCapdata_struct_16 *buf;
2240 int return_code;
2241
2242 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2243 if (!buf) {
2244 printk(KERN_WARNING "cciss: out of memory\n");
2245 return;
2246 }
2247
2248 if (withirq) {
2249 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2250 ctlr, buf, sizeof(ReadCapdata_struct_16),
2251 1, logvol, 0, TYPE_CMD);
2252 }
2253 else {
2254 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2255 ctlr, buf, sizeof(ReadCapdata_struct_16),
2256 1, logvol, 0, NULL, TYPE_CMD);
2257 }
2258 if (return_code == IO_OK) {
2259 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2260 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2261 } else { /* read capacity command failed */
2262 printk(KERN_WARNING "cciss: read capacity failed\n");
2263 *total_size = 0;
2264 *block_size = BLOCK_SIZE;
2265 }
2266 printk(KERN_INFO " blocks= %llu block_size= %d\n",
2267 (unsigned long long)*total_size+1, *block_size);
2268 kfree(buf);
2269 }
2270
2271 static int cciss_revalidate(struct gendisk *disk)
2272 {
2273 ctlr_info_t *h = get_host(disk);
2274 drive_info_struct *drv = get_drv(disk);
2275 int logvol;
2276 int FOUND = 0;
2277 unsigned int block_size;
2278 sector_t total_size;
2279 InquiryData_struct *inq_buff = NULL;
2280
2281 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2282 if (h->drv[logvol].LunID == drv->LunID) {
2283 FOUND = 1;
2284 break;
2285 }
2286 }
2287
2288 if (!FOUND)
2289 return 1;
2290
2291 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2292 if (inq_buff == NULL) {
2293 printk(KERN_WARNING "cciss: out of memory\n");
2294 return 1;
2295 }
2296 if (h->cciss_read == CCISS_READ_10) {
2297 cciss_read_capacity(h->ctlr, logvol, 1,
2298 &total_size, &block_size);
2299 } else {
2300 cciss_read_capacity_16(h->ctlr, logvol, 1,
2301 &total_size, &block_size);
2302 }
2303 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2304 inq_buff, drv);
2305
2306 blk_queue_hardsect_size(drv->queue, drv->block_size);
2307 set_capacity(disk, drv->nr_blocks);
2308
2309 kfree(inq_buff);
2310 return 0;
2311 }
2312
2313 /*
2314 * Wait polling for a command to complete.
2315 * The memory mapped FIFO is polled for the completion.
2316 * Used only at init time, interrupts from the HBA are disabled.
2317 */
2318 static unsigned long pollcomplete(int ctlr)
2319 {
2320 unsigned long done;
2321 int i;
2322
2323 /* Wait (up to 20 seconds) for a command to complete */
2324
2325 for (i = 20 * HZ; i > 0; i--) {
2326 done = hba[ctlr]->access.command_completed(hba[ctlr]);
2327 if (done == FIFO_EMPTY)
2328 schedule_timeout_uninterruptible(1);
2329 else
2330 return done;
2331 }
2332 /* Invalid address to tell caller we ran out of time */
2333 return 1;
2334 }
2335
2336 static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
2337 {
2338 /* We get in here if sendcmd() is polling for completions
2339 and gets some command back that it wasn't expecting --
2340 something other than that which it just sent down.
2341 Ordinarily, that shouldn't happen, but it can happen when
2342 the scsi tape stuff gets into error handling mode, and
2343 starts using sendcmd() to try to abort commands and
2344 reset tape drives. In that case, sendcmd may pick up
2345 completions of commands that were sent to logical drives
2346 through the block i/o system, or cciss ioctls completing, etc.
2347 In that case, we need to save those completions for later
2348 processing by the interrupt handler.
2349 */
2350
2351 #ifdef CONFIG_CISS_SCSI_TAPE
2352 struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
2353
2354 /* If it's not the scsi tape stuff doing error handling, (abort */
2355 /* or reset) then we don't expect anything weird. */
2356 if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
2357 #endif
2358 printk(KERN_WARNING "cciss cciss%d: SendCmd "
2359 "Invalid command list address returned! (%lx)\n",
2360 ctlr, complete);
2361 /* not much we can do. */
2362 #ifdef CONFIG_CISS_SCSI_TAPE
2363 return 1;
2364 }
2365
2366 /* We've sent down an abort or reset, but something else
2367 has completed */
2368 if (srl->ncompletions >= (hba[ctlr]->nr_cmds + 2)) {
2369 /* Uh oh. No room to save it for later... */
2370 printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
2371 "reject list overflow, command lost!\n", ctlr);
2372 return 1;
2373 }
2374 /* Save it for later */
2375 srl->complete[srl->ncompletions] = complete;
2376 srl->ncompletions++;
2377 #endif
2378 return 0;
2379 }
2380
2381 /*
2382 * Send a command to the controller, and wait for it to complete.
2383 * Only used at init time.
2384 */
2385 static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num, /* 0: address the controller,
2386 1: address logical volume log_unit,
2387 2: periph device address is scsi3addr */
2388 unsigned int log_unit,
2389 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2390 {
2391 CommandList_struct *c;
2392 int i;
2393 unsigned long complete;
2394 ctlr_info_t *info_p = hba[ctlr];
2395 u64bit buff_dma_handle;
2396 int status, done = 0;
2397
2398 if ((c = cmd_alloc(info_p, 1)) == NULL) {
2399 printk(KERN_WARNING "cciss: unable to get memory");
2400 return IO_ERROR;
2401 }
2402 status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
2403 log_unit, page_code, scsi3addr, cmd_type);
2404 if (status != IO_OK) {
2405 cmd_free(info_p, c, 1);
2406 return status;
2407 }
2408 resend_cmd1:
2409 /*
2410 * Disable interrupt
2411 */
2412 #ifdef CCISS_DEBUG
2413 printk(KERN_DEBUG "cciss: turning intr off\n");
2414 #endif /* CCISS_DEBUG */
2415 info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);
2416
2417 /* Make sure there is room in the command FIFO */
2418 /* Actually it should be completely empty at this time */
2419 /* unless we are in here doing error handling for the scsi */
2420 /* tape side of the driver. */
2421 for (i = 200000; i > 0; i--) {
2422 /* if fifo isn't full go */
2423 if (!(info_p->access.fifo_full(info_p))) {
2424
2425 break;
2426 }
2427 udelay(10);
2428 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
2429 " waiting!\n", ctlr);
2430 }
2431 /*
2432 * Send the cmd
2433 */
2434 info_p->access.submit_command(info_p, c);
2435 done = 0;
2436 do {
2437 complete = pollcomplete(ctlr);
2438
2439 #ifdef CCISS_DEBUG
2440 printk(KERN_DEBUG "cciss: command completed\n");
2441 #endif /* CCISS_DEBUG */
2442
2443 if (complete == 1) {
2444 printk(KERN_WARNING
2445 "cciss cciss%d: SendCmd Timeout out, "
2446 "No command list address returned!\n", ctlr);
2447 status = IO_ERROR;
2448 done = 1;
2449 break;
2450 }
2451
2452 /* This will need to change for direct lookup completions */
2453 if ((complete & CISS_ERROR_BIT)
2454 && (complete & ~CISS_ERROR_BIT) == c->busaddr) {
2455 /* if data overrun or underun on Report command
2456 ignore it
2457 */
2458 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2459 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2460 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2461 ((c->err_info->CommandStatus ==
2462 CMD_DATA_OVERRUN) ||
2463 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN)
2464 )) {
2465 complete = c->busaddr;
2466 } else {
2467 if (c->err_info->CommandStatus ==
2468 CMD_UNSOLICITED_ABORT) {
2469 printk(KERN_WARNING "cciss%d: "
2470 "unsolicited abort %p\n",
2471 ctlr, c);
2472 if (c->retry_count < MAX_CMD_RETRIES) {
2473 printk(KERN_WARNING
2474 "cciss%d: retrying %p\n",
2475 ctlr, c);
2476 c->retry_count++;
2477 /* erase the old error */
2478 /* information */
2479 memset(c->err_info, 0,
2480 sizeof
2481 (ErrorInfo_struct));
2482 goto resend_cmd1;
2483 } else {
2484 printk(KERN_WARNING
2485 "cciss%d: retried %p too "
2486 "many times\n", ctlr, c);
2487 status = IO_ERROR;
2488 goto cleanup1;
2489 }
2490 } else if (c->err_info->CommandStatus ==
2491 CMD_UNABORTABLE) {
2492 printk(KERN_WARNING
2493 "cciss%d: command could not be aborted.\n",
2494 ctlr);
2495 status = IO_ERROR;
2496 goto cleanup1;
2497 }
2498 printk(KERN_WARNING "ciss ciss%d: sendcmd"
2499 " Error %x \n", ctlr,
2500 c->err_info->CommandStatus);
2501 printk(KERN_WARNING "ciss ciss%d: sendcmd"
2502 " offensive info\n"
2503 " size %x\n num %x value %x\n",
2504 ctlr,
2505 c->err_info->MoreErrInfo.Invalid_Cmd.
2506 offense_size,
2507 c->err_info->MoreErrInfo.Invalid_Cmd.
2508 offense_num,
2509 c->err_info->MoreErrInfo.Invalid_Cmd.
2510 offense_value);
2511 status = IO_ERROR;
2512 goto cleanup1;
2513 }
2514 }
2515 /* This will need changing for direct lookup completions */
2516 if (complete != c->busaddr) {
2517 if (add_sendcmd_reject(cmd, ctlr, complete) != 0) {
2518 BUG(); /* we are pretty much hosed if we get here. */
2519 }
2520 continue;
2521 } else
2522 done = 1;
2523 } while (!done);
2524
2525 cleanup1:
2526 /* unlock the data buffer from DMA */
2527 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2528 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2529 pci_unmap_single(info_p->pdev, (dma_addr_t) buff_dma_handle.val,
2530 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2531 #ifdef CONFIG_CISS_SCSI_TAPE
2532 /* if we saved some commands for later, process them now. */
2533 if (info_p->scsi_rejects.ncompletions > 0)
2534 do_cciss_intr(0, info_p);
2535 #endif
2536 cmd_free(info_p, c, 1);
2537 return status;
2538 }
2539
2540 /*
2541 * Map (physical) PCI mem into (virtual) kernel space
2542 */
2543 static void __iomem *remap_pci_mem(ulong base, ulong size)
2544 {
2545 ulong page_base = ((ulong) base) & PAGE_MASK;
2546 ulong page_offs = ((ulong) base) - page_base;
2547 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2548
2549 return page_remapped ? (page_remapped + page_offs) : NULL;
2550 }
2551
2552 /*
2553 * Takes jobs of the Q and sends them to the hardware, then puts it on
2554 * the Q to wait for completion.
2555 */
2556 static void start_io(ctlr_info_t *h)
2557 {
2558 CommandList_struct *c;
2559
2560 while (!hlist_empty(&h->reqQ)) {
2561 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
2562 /* can't do anything if fifo is full */
2563 if ((h->access.fifo_full(h))) {
2564 printk(KERN_WARNING "cciss: fifo full\n");
2565 break;
2566 }
2567
2568 /* Get the first entry from the Request Q */
2569 removeQ(c);
2570 h->Qdepth--;
2571
2572 /* Tell the controller execute command */
2573 h->access.submit_command(h, c);
2574
2575 /* Put job onto the completed Q */
2576 addQ(&h->cmpQ, c);
2577 }
2578 }
2579
2580 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2581 /* Zeros out the error record and then resends the command back */
2582 /* to the controller */
2583 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
2584 {
2585 /* erase the old error information */
2586 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2587
2588 /* add it to software queue and then send it to the controller */
2589 addQ(&h->reqQ, c);
2590 h->Qdepth++;
2591 if (h->Qdepth > h->maxQsinceinit)
2592 h->maxQsinceinit = h->Qdepth;
2593
2594 start_io(h);
2595 }
2596
2597 static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2598 unsigned int msg_byte, unsigned int host_byte,
2599 unsigned int driver_byte)
2600 {
2601 /* inverse of macros in scsi.h */
2602 return (scsi_status_byte & 0xff) |
2603 ((msg_byte & 0xff) << 8) |
2604 ((host_byte & 0xff) << 16) |
2605 ((driver_byte & 0xff) << 24);
2606 }
2607
2608 static inline int evaluate_target_status(ctlr_info_t *h,
2609 CommandList_struct *cmd, int *retry_cmd)
2610 {
2611 unsigned char sense_key;
2612 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2613 int error_value;
2614
2615 *retry_cmd = 0;
2616 /* If we get in here, it means we got "target status", that is, scsi status */
2617 status_byte = cmd->err_info->ScsiStatus;
2618 driver_byte = DRIVER_OK;
2619 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2620
2621 if (blk_pc_request(cmd->rq))
2622 host_byte = DID_PASSTHROUGH;
2623 else
2624 host_byte = DID_OK;
2625
2626 error_value = make_status_bytes(status_byte, msg_byte,
2627 host_byte, driver_byte);
2628
2629 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
2630 if (!blk_pc_request(cmd->rq))
2631 printk(KERN_WARNING "cciss: cmd %p "
2632 "has SCSI Status 0x%x\n",
2633 cmd, cmd->err_info->ScsiStatus);
2634 return error_value;
2635 }
2636
2637 /* check the sense key */
2638 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2639 /* no status or recovered error */
2640 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2641 error_value = 0;
2642
2643 if (check_for_unit_attention(h, cmd)) {
2644 *retry_cmd = !blk_pc_request(cmd->rq);
2645 return 0;
2646 }
2647
2648 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
2649 if (error_value != 0)
2650 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2651 " sense key = 0x%x\n", cmd, sense_key);
2652 return error_value;
2653 }
2654
2655 /* SG_IO or similar, copy sense data back */
2656 if (cmd->rq->sense) {
2657 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2658 cmd->rq->sense_len = cmd->err_info->SenseLen;
2659 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2660 cmd->rq->sense_len);
2661 } else
2662 cmd->rq->sense_len = 0;
2663
2664 return error_value;
2665 }
2666
2667 /* checks the status of the job and calls complete buffers to mark all
2668 * buffers for the completed job. Note that this function does not need
2669 * to hold the hba/queue lock.
2670 */
2671 static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2672 int timeout)
2673 {
2674 int retry_cmd = 0;
2675 struct request *rq = cmd->rq;
2676
2677 rq->errors = 0;
2678
2679 if (timeout)
2680 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
2681
2682 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2683 goto after_error_processing;
2684
2685 switch (cmd->err_info->CommandStatus) {
2686 case CMD_TARGET_STATUS:
2687 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
2688 break;
2689 case CMD_DATA_UNDERRUN:
2690 if (blk_fs_request(cmd->rq)) {
2691 printk(KERN_WARNING "cciss: cmd %p has"
2692 " completed with data underrun "
2693 "reported\n", cmd);
2694 cmd->rq->data_len = cmd->err_info->ResidualCnt;
2695 }
2696 break;
2697 case CMD_DATA_OVERRUN:
2698 if (blk_fs_request(cmd->rq))
2699 printk(KERN_WARNING "cciss: cmd %p has"
2700 " completed with data overrun "
2701 "reported\n", cmd);
2702 break;
2703 case CMD_INVALID:
2704 printk(KERN_WARNING "cciss: cmd %p is "
2705 "reported invalid\n", cmd);
2706 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2707 cmd->err_info->CommandStatus, DRIVER_OK,
2708 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2709 break;
2710 case CMD_PROTOCOL_ERR:
2711 printk(KERN_WARNING "cciss: cmd %p has "
2712 "protocol error \n", cmd);
2713 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2714 cmd->err_info->CommandStatus, DRIVER_OK,
2715 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2716 break;
2717 case CMD_HARDWARE_ERR:
2718 printk(KERN_WARNING "cciss: cmd %p had "
2719 " hardware error\n", cmd);
2720 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2721 cmd->err_info->CommandStatus, DRIVER_OK,
2722 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2723 break;
2724 case CMD_CONNECTION_LOST:
2725 printk(KERN_WARNING "cciss: cmd %p had "
2726 "connection lost\n", cmd);
2727 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2728 cmd->err_info->CommandStatus, DRIVER_OK,
2729 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2730 break;
2731 case CMD_ABORTED:
2732 printk(KERN_WARNING "cciss: cmd %p was "
2733 "aborted\n", cmd);
2734 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2735 cmd->err_info->CommandStatus, DRIVER_OK,
2736 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
2737 break;
2738 case CMD_ABORT_FAILED:
2739 printk(KERN_WARNING "cciss: cmd %p reports "
2740 "abort failed\n", cmd);
2741 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2742 cmd->err_info->CommandStatus, DRIVER_OK,
2743 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2744 break;
2745 case CMD_UNSOLICITED_ABORT:
2746 printk(KERN_WARNING "cciss%d: unsolicited "
2747 "abort %p\n", h->ctlr, cmd);
2748 if (cmd->retry_count < MAX_CMD_RETRIES) {
2749 retry_cmd = 1;
2750 printk(KERN_WARNING
2751 "cciss%d: retrying %p\n", h->ctlr, cmd);
2752 cmd->retry_count++;
2753 } else
2754 printk(KERN_WARNING
2755 "cciss%d: %p retried too "
2756 "many times\n", h->ctlr, cmd);
2757 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2758 cmd->err_info->CommandStatus, DRIVER_OK,
2759 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
2760 break;
2761 case CMD_TIMEOUT:
2762 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
2763 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2764 cmd->err_info->CommandStatus, DRIVER_OK,
2765 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2766 break;
2767 default:
2768 printk(KERN_WARNING "cciss: cmd %p returned "
2769 "unknown status %x\n", cmd,
2770 cmd->err_info->CommandStatus);
2771 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2772 cmd->err_info->CommandStatus, DRIVER_OK,
2773 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2774 }
2775
2776 after_error_processing:
2777
2778 /* We need to return this command */
2779 if (retry_cmd) {
2780 resend_cciss_cmd(h, cmd);
2781 return;
2782 }
2783 cmd->rq->completion_data = cmd;
2784 blk_complete_request(cmd->rq);
2785 }
2786
2787 /*
2788 * Get a request and submit it to the controller.
2789 */
2790 static void do_cciss_request(struct request_queue *q)
2791 {
2792 ctlr_info_t *h = q->queuedata;
2793 CommandList_struct *c;
2794 sector_t start_blk;
2795 int seg;
2796 struct request *creq;
2797 u64bit temp64;
2798 struct scatterlist tmp_sg[MAXSGENTRIES];
2799 drive_info_struct *drv;
2800 int i, dir;
2801
2802 /* We call start_io here in case there is a command waiting on the
2803 * queue that has not been sent.
2804 */
2805 if (blk_queue_plugged(q))
2806 goto startio;
2807
2808 queue:
2809 creq = elv_next_request(q);
2810 if (!creq)
2811 goto startio;
2812
2813 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
2814
2815 if ((c = cmd_alloc(h, 1)) == NULL)
2816 goto full;
2817
2818 blkdev_dequeue_request(creq);
2819
2820 spin_unlock_irq(q->queue_lock);
2821
2822 c->cmd_type = CMD_RWREQ;
2823 c->rq = creq;
2824
2825 /* fill in the request */
2826 drv = creq->rq_disk->private_data;
2827 c->Header.ReplyQueue = 0; // unused in simple mode
2828 /* got command from pool, so use the command block index instead */
2829 /* for direct lookups. */
2830 /* The first 2 bits are reserved for controller error reporting. */
2831 c->Header.Tag.lower = (c->cmdindex << 3);
2832 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
2833 c->Header.LUN.LogDev.VolId = drv->LunID;
2834 c->Header.LUN.LogDev.Mode = 1;
2835 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
2836 c->Request.Type.Type = TYPE_CMD; // It is a command.
2837 c->Request.Type.Attribute = ATTR_SIMPLE;
2838 c->Request.Type.Direction =
2839 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
2840 c->Request.Timeout = 0; // Don't time out
2841 c->Request.CDB[0] =
2842 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
2843 start_blk = creq->sector;
2844 #ifdef CCISS_DEBUG
2845 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", (int)creq->sector,
2846 (int)creq->nr_sectors);
2847 #endif /* CCISS_DEBUG */
2848
2849 sg_init_table(tmp_sg, MAXSGENTRIES);
2850 seg = blk_rq_map_sg(q, creq, tmp_sg);
2851
2852 /* get the DMA records for the setup */
2853 if (c->Request.Type.Direction == XFER_READ)
2854 dir = PCI_DMA_FROMDEVICE;
2855 else
2856 dir = PCI_DMA_TODEVICE;
2857
2858 for (i = 0; i < seg; i++) {
2859 c->SG[i].Len = tmp_sg[i].length;
2860 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
2861 tmp_sg[i].offset,
2862 tmp_sg[i].length, dir);
2863 c->SG[i].Addr.lower = temp64.val32.lower;
2864 c->SG[i].Addr.upper = temp64.val32.upper;
2865 c->SG[i].Ext = 0; // we are not chaining
2866 }
2867 /* track how many SG entries we are using */
2868 if (seg > h->maxSG)
2869 h->maxSG = seg;
2870
2871 #ifdef CCISS_DEBUG
2872 printk(KERN_DEBUG "cciss: Submitting %lu sectors in %d segments\n",
2873 creq->nr_sectors, seg);
2874 #endif /* CCISS_DEBUG */
2875
2876 c->Header.SGList = c->Header.SGTotal = seg;
2877 if (likely(blk_fs_request(creq))) {
2878 if(h->cciss_read == CCISS_READ_10) {
2879 c->Request.CDB[1] = 0;
2880 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
2881 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
2882 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
2883 c->Request.CDB[5] = start_blk & 0xff;
2884 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
2885 c->Request.CDB[7] = (creq->nr_sectors >> 8) & 0xff;
2886 c->Request.CDB[8] = creq->nr_sectors & 0xff;
2887 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
2888 } else {
2889 u32 upper32 = upper_32_bits(start_blk);
2890
2891 c->Request.CDBLen = 16;
2892 c->Request.CDB[1]= 0;
2893 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
2894 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
2895 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
2896 c->Request.CDB[5]= upper32 & 0xff;
2897 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
2898 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
2899 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
2900 c->Request.CDB[9]= start_blk & 0xff;
2901 c->Request.CDB[10]= (creq->nr_sectors >> 24) & 0xff;
2902 c->Request.CDB[11]= (creq->nr_sectors >> 16) & 0xff;
2903 c->Request.CDB[12]= (creq->nr_sectors >> 8) & 0xff;
2904 c->Request.CDB[13]= creq->nr_sectors & 0xff;
2905 c->Request.CDB[14] = c->Request.CDB[15] = 0;
2906 }
2907 } else if (blk_pc_request(creq)) {
2908 c->Request.CDBLen = creq->cmd_len;
2909 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
2910 } else {
2911 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
2912 BUG();
2913 }
2914
2915 spin_lock_irq(q->queue_lock);
2916
2917 addQ(&h->reqQ, c);
2918 h->Qdepth++;
2919 if (h->Qdepth > h->maxQsinceinit)
2920 h->maxQsinceinit = h->Qdepth;
2921
2922 goto queue;
2923 full:
2924 blk_stop_queue(q);
2925 startio:
2926 /* We will already have the driver lock here so not need
2927 * to lock it.
2928 */
2929 start_io(h);
2930 }
2931
2932 static inline unsigned long get_next_completion(ctlr_info_t *h)
2933 {
2934 #ifdef CONFIG_CISS_SCSI_TAPE
2935 /* Any rejects from sendcmd() lying around? Process them first */
2936 if (h->scsi_rejects.ncompletions == 0)
2937 return h->access.command_completed(h);
2938 else {
2939 struct sendcmd_reject_list *srl;
2940 int n;
2941 srl = &h->scsi_rejects;
2942 n = --srl->ncompletions;
2943 /* printk("cciss%d: processing saved reject\n", h->ctlr); */
2944 printk("p");
2945 return srl->complete[n];
2946 }
2947 #else
2948 return h->access.command_completed(h);
2949 #endif
2950 }
2951
2952 static inline int interrupt_pending(ctlr_info_t *h)
2953 {
2954 #ifdef CONFIG_CISS_SCSI_TAPE
2955 return (h->access.intr_pending(h)
2956 || (h->scsi_rejects.ncompletions > 0));
2957 #else
2958 return h->access.intr_pending(h);
2959 #endif
2960 }
2961
2962 static inline long interrupt_not_for_us(ctlr_info_t *h)
2963 {
2964 #ifdef CONFIG_CISS_SCSI_TAPE
2965 return (((h->access.intr_pending(h) == 0) ||
2966 (h->interrupts_enabled == 0))
2967 && (h->scsi_rejects.ncompletions == 0));
2968 #else
2969 return (((h->access.intr_pending(h) == 0) ||
2970 (h->interrupts_enabled == 0)));
2971 #endif
2972 }
2973
2974 static irqreturn_t do_cciss_intr(int irq, void *dev_id)
2975 {
2976 ctlr_info_t *h = dev_id;
2977 CommandList_struct *c;
2978 unsigned long flags;
2979 __u32 a, a1, a2;
2980
2981 if (interrupt_not_for_us(h))
2982 return IRQ_NONE;
2983 /*
2984 * If there are completed commands in the completion queue,
2985 * we had better do something about it.
2986 */
2987 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2988 while (interrupt_pending(h)) {
2989 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
2990 a1 = a;
2991 if ((a & 0x04)) {
2992 a2 = (a >> 3);
2993 if (a2 >= h->nr_cmds) {
2994 printk(KERN_WARNING
2995 "cciss: controller cciss%d failed, stopping.\n",
2996 h->ctlr);
2997 fail_all_cmds(h->ctlr);
2998 return IRQ_HANDLED;
2999 }
3000
3001 c = h->cmd_pool + a2;
3002 a = c->busaddr;
3003
3004 } else {
3005 struct hlist_node *tmp;
3006
3007 a &= ~3;
3008 c = NULL;
3009 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3010 if (c->busaddr == a)
3011 break;
3012 }
3013 }
3014 /*
3015 * If we've found the command, take it off the
3016 * completion Q and free it
3017 */
3018 if (c && c->busaddr == a) {
3019 removeQ(c);
3020 if (c->cmd_type == CMD_RWREQ) {
3021 complete_command(h, c, 0);
3022 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3023 complete(c->waiting);
3024 }
3025 # ifdef CONFIG_CISS_SCSI_TAPE
3026 else if (c->cmd_type == CMD_SCSI)
3027 complete_scsi_command(c, 0, a1);
3028 # endif
3029 continue;
3030 }
3031 }
3032 }
3033
3034 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3035 return IRQ_HANDLED;
3036 }
3037
3038 static int scan_thread(void *data)
3039 {
3040 ctlr_info_t *h = data;
3041 int rc;
3042 DECLARE_COMPLETION_ONSTACK(wait);
3043 h->rescan_wait = &wait;
3044
3045 for (;;) {
3046 rc = wait_for_completion_interruptible(&wait);
3047 if (kthread_should_stop())
3048 break;
3049 if (!rc)
3050 rebuild_lun_table(h, 0);
3051 }
3052 return 0;
3053 }
3054
3055 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3056 {
3057 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3058 return 0;
3059
3060 switch (c->err_info->SenseInfo[12]) {
3061 case STATE_CHANGED:
3062 printk(KERN_WARNING "cciss%d: a state change "
3063 "detected, command retried\n", h->ctlr);
3064 return 1;
3065 break;
3066 case LUN_FAILED:
3067 printk(KERN_WARNING "cciss%d: LUN failure "
3068 "detected, action required\n", h->ctlr);
3069 return 1;
3070 break;
3071 case REPORT_LUNS_CHANGED:
3072 printk(KERN_WARNING "cciss%d: report LUN data "
3073 "changed\n", h->ctlr);
3074 if (h->rescan_wait)
3075 complete(h->rescan_wait);
3076 return 1;
3077 break;
3078 case POWER_OR_RESET:
3079 printk(KERN_WARNING "cciss%d: a power on "
3080 "or device reset detected\n", h->ctlr);
3081 return 1;
3082 break;
3083 case UNIT_ATTENTION_CLEARED:
3084 printk(KERN_WARNING "cciss%d: unit attention "
3085 "cleared by another initiator\n", h->ctlr);
3086 return 1;
3087 break;
3088 default:
3089 printk(KERN_WARNING "cciss%d: unknown "
3090 "unit attention detected\n", h->ctlr);
3091 return 1;
3092 }
3093 }
3094
3095 /*
3096 * We cannot read the structure directly, for portability we must use
3097 * the io functions.
3098 * This is for debug only.
3099 */
3100 #ifdef CCISS_DEBUG
3101 static void print_cfg_table(CfgTable_struct *tb)
3102 {
3103 int i;
3104 char temp_name[17];
3105
3106 printk("Controller Configuration information\n");
3107 printk("------------------------------------\n");
3108 for (i = 0; i < 4; i++)
3109 temp_name[i] = readb(&(tb->Signature[i]));
3110 temp_name[4] = '\0';
3111 printk(" Signature = %s\n", temp_name);
3112 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
3113 printk(" Transport methods supported = 0x%x\n",
3114 readl(&(tb->TransportSupport)));
3115 printk(" Transport methods active = 0x%x\n",
3116 readl(&(tb->TransportActive)));
3117 printk(" Requested transport Method = 0x%x\n",
3118 readl(&(tb->HostWrite.TransportRequest)));
3119 printk(" Coalesce Interrupt Delay = 0x%x\n",
3120 readl(&(tb->HostWrite.CoalIntDelay)));
3121 printk(" Coalesce Interrupt Count = 0x%x\n",
3122 readl(&(tb->HostWrite.CoalIntCount)));
3123 printk(" Max outstanding commands = 0x%d\n",
3124 readl(&(tb->CmdsOutMax)));
3125 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3126 for (i = 0; i < 16; i++)
3127 temp_name[i] = readb(&(tb->ServerName[i]));
3128 temp_name[16] = '\0';
3129 printk(" Server Name = %s\n", temp_name);
3130 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
3131 }
3132 #endif /* CCISS_DEBUG */
3133
3134 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3135 {
3136 int i, offset, mem_type, bar_type;
3137 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3138 return 0;
3139 offset = 0;
3140 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3141 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3142 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3143 offset += 4;
3144 else {
3145 mem_type = pci_resource_flags(pdev, i) &
3146 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3147 switch (mem_type) {
3148 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3149 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3150 offset += 4; /* 32 bit */
3151 break;
3152 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3153 offset += 8;
3154 break;
3155 default: /* reserved in PCI 2.2 */
3156 printk(KERN_WARNING
3157 "Base address is invalid\n");
3158 return -1;
3159 break;
3160 }
3161 }
3162 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3163 return i + 1;
3164 }
3165 return -1;
3166 }
3167
3168 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3169 * controllers that are capable. If not, we use IO-APIC mode.
3170 */
3171
3172 static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3173 struct pci_dev *pdev, __u32 board_id)
3174 {
3175 #ifdef CONFIG_PCI_MSI
3176 int err;
3177 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3178 {0, 2}, {0, 3}
3179 };
3180
3181 /* Some boards advertise MSI but don't really support it */
3182 if ((board_id == 0x40700E11) ||
3183 (board_id == 0x40800E11) ||
3184 (board_id == 0x40820E11) || (board_id == 0x40830E11))
3185 goto default_int_mode;
3186
3187 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3188 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3189 if (!err) {
3190 c->intr[0] = cciss_msix_entries[0].vector;
3191 c->intr[1] = cciss_msix_entries[1].vector;
3192 c->intr[2] = cciss_msix_entries[2].vector;
3193 c->intr[3] = cciss_msix_entries[3].vector;
3194 c->msix_vector = 1;
3195 return;
3196 }
3197 if (err > 0) {
3198 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3199 "available\n", err);
3200 goto default_int_mode;
3201 } else {
3202 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3203 err);
3204 goto default_int_mode;
3205 }
3206 }
3207 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3208 if (!pci_enable_msi(pdev)) {
3209 c->msi_vector = 1;
3210 } else {
3211 printk(KERN_WARNING "cciss: MSI init failed\n");
3212 }
3213 }
3214 default_int_mode:
3215 #endif /* CONFIG_PCI_MSI */
3216 /* if we get here we're going to use the default interrupt mode */
3217 c->intr[SIMPLE_MODE_INT] = pdev->irq;
3218 return;
3219 }
3220
3221 static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
3222 {
3223 ushort subsystem_vendor_id, subsystem_device_id, command;
3224 __u32 board_id, scratchpad = 0;
3225 __u64 cfg_offset;
3226 __u32 cfg_base_addr;
3227 __u64 cfg_base_addr_index;
3228 int i, err;
3229
3230 /* check to see if controller has been disabled */
3231 /* BEFORE trying to enable it */
3232 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3233 if (!(command & 0x02)) {
3234 printk(KERN_WARNING
3235 "cciss: controller appears to be disabled\n");
3236 return -ENODEV;
3237 }
3238
3239 err = pci_enable_device(pdev);
3240 if (err) {
3241 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
3242 return err;
3243 }
3244
3245 err = pci_request_regions(pdev, "cciss");
3246 if (err) {
3247 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
3248 "aborting\n");
3249 return err;
3250 }
3251
3252 subsystem_vendor_id = pdev->subsystem_vendor;
3253 subsystem_device_id = pdev->subsystem_device;
3254 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3255 subsystem_vendor_id);
3256
3257 #ifdef CCISS_DEBUG
3258 printk("command = %x\n", command);
3259 printk("irq = %x\n", pdev->irq);
3260 printk("board_id = %x\n", board_id);
3261 #endif /* CCISS_DEBUG */
3262
3263 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3264 * else we use the IO-APIC interrupt assigned to us by system ROM.
3265 */
3266 cciss_interrupt_mode(c, pdev, board_id);
3267
3268 /* find the memory BAR */
3269 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3270 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3271 break;
3272 }
3273 if (i == DEVICE_COUNT_RESOURCE) {
3274 printk(KERN_WARNING "cciss: No memory BAR found\n");
3275 err = -ENODEV;
3276 goto err_out_free_res;
3277 }
3278
3279 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3280 * already removed
3281 */
3282
3283 #ifdef CCISS_DEBUG
3284 printk("address 0 = %lx\n", c->paddr);
3285 #endif /* CCISS_DEBUG */
3286 c->vaddr = remap_pci_mem(c->paddr, 0x250);
3287
3288 /* Wait for the board to become ready. (PCI hotplug needs this.)
3289 * We poll for up to 120 secs, once per 100ms. */
3290 for (i = 0; i < 1200; i++) {
3291 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3292 if (scratchpad == CCISS_FIRMWARE_READY)
3293 break;
3294 set_current_state(TASK_INTERRUPTIBLE);
3295 schedule_timeout(HZ / 10); /* wait 100ms */
3296 }
3297 if (scratchpad != CCISS_FIRMWARE_READY) {
3298 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
3299 err = -ENODEV;
3300 goto err_out_free_res;
3301 }
3302
3303 /* get the address index number */
3304 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3305 cfg_base_addr &= (__u32) 0x0000ffff;
3306 #ifdef CCISS_DEBUG
3307 printk("cfg base address = %x\n", cfg_base_addr);
3308 #endif /* CCISS_DEBUG */
3309 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
3310 #ifdef CCISS_DEBUG
3311 printk("cfg base address index = %llx\n",
3312 (unsigned long long)cfg_base_addr_index);
3313 #endif /* CCISS_DEBUG */
3314 if (cfg_base_addr_index == -1) {
3315 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
3316 err = -ENODEV;
3317 goto err_out_free_res;
3318 }
3319
3320 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3321 #ifdef CCISS_DEBUG
3322 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
3323 #endif /* CCISS_DEBUG */
3324 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3325 cfg_base_addr_index) +
3326 cfg_offset, sizeof(CfgTable_struct));
3327 c->board_id = board_id;
3328
3329 #ifdef CCISS_DEBUG
3330 print_cfg_table(c->cfgtable);
3331 #endif /* CCISS_DEBUG */
3332
3333 /* Some controllers support Zero Memory Raid (ZMR).
3334 * When configured in ZMR mode the number of supported
3335 * commands drops to 64. So instead of just setting an
3336 * arbitrary value we make the driver a little smarter.
3337 * We read the config table to tell us how many commands
3338 * are supported on the controller then subtract 4 to
3339 * leave a little room for ioctl calls.
3340 */
3341 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
3342 for (i = 0; i < ARRAY_SIZE(products); i++) {
3343 if (board_id == products[i].board_id) {
3344 c->product_name = products[i].product_name;
3345 c->access = *(products[i].access);
3346 c->nr_cmds = c->max_commands - 4;
3347 break;
3348 }
3349 }
3350 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3351 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3352 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3353 (readb(&c->cfgtable->Signature[3]) != 'S')) {
3354 printk("Does not appear to be a valid CISS config table\n");
3355 err = -ENODEV;
3356 goto err_out_free_res;
3357 }
3358 /* We didn't find the controller in our list. We know the
3359 * signature is valid. If it's an HP device let's try to
3360 * bind to the device and fire it up. Otherwise we bail.
3361 */
3362 if (i == ARRAY_SIZE(products)) {
3363 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3364 c->product_name = products[i-1].product_name;
3365 c->access = *(products[i-1].access);
3366 c->nr_cmds = c->max_commands - 4;
3367 printk(KERN_WARNING "cciss: This is an unknown "
3368 "Smart Array controller.\n"
3369 "cciss: Please update to the latest driver "
3370 "available from www.hp.com.\n");
3371 } else {
3372 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3373 " to access the Smart Array controller %08lx\n"
3374 , (unsigned long)board_id);
3375 err = -ENODEV;
3376 goto err_out_free_res;
3377 }
3378 }
3379 #ifdef CONFIG_X86
3380 {
3381 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3382 __u32 prefetch;
3383 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3384 prefetch |= 0x100;
3385 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3386 }
3387 #endif
3388
3389 /* Disabling DMA prefetch and refetch for the P600.
3390 * An ASIC bug may result in accesses to invalid memory addresses.
3391 * We've disabled prefetch for some time now. Testing with XEN
3392 * kernels revealed a bug in the refetch if dom0 resides on a P600.
3393 */
3394 if(board_id == 0x3225103C) {
3395 __u32 dma_prefetch;
3396 __u32 dma_refetch;
3397 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3398 dma_prefetch |= 0x8000;
3399 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
3400 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3401 dma_refetch |= 0x1;
3402 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
3403 }
3404
3405 #ifdef CCISS_DEBUG
3406 printk("Trying to put board into Simple mode\n");
3407 #endif /* CCISS_DEBUG */
3408 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
3409 /* Update the field, and then ring the doorbell */
3410 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3411 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
3412
3413 /* under certain very rare conditions, this can take awhile.
3414 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3415 * as we enter this code.) */
3416 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3417 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3418 break;
3419 /* delay and try again */
3420 set_current_state(TASK_INTERRUPTIBLE);
3421 schedule_timeout(10);
3422 }
3423
3424 #ifdef CCISS_DEBUG
3425 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3426 readl(c->vaddr + SA5_DOORBELL));
3427 #endif /* CCISS_DEBUG */
3428 #ifdef CCISS_DEBUG
3429 print_cfg_table(c->cfgtable);
3430 #endif /* CCISS_DEBUG */
3431
3432 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3433 printk(KERN_WARNING "cciss: unable to get board into"
3434 " simple mode\n");
3435 err = -ENODEV;
3436 goto err_out_free_res;
3437 }
3438 return 0;
3439
3440 err_out_free_res:
3441 /*
3442 * Deliberately omit pci_disable_device(): it does something nasty to
3443 * Smart Array controllers that pci_enable_device does not undo
3444 */
3445 pci_release_regions(pdev);
3446 return err;
3447 }
3448
3449 /* Function to find the first free pointer into our hba[] array
3450 * Returns -1 if no free entries are left.
3451 */
3452 static int alloc_cciss_hba(void)
3453 {
3454 int i;
3455
3456 for (i = 0; i < MAX_CTLR; i++) {
3457 if (!hba[i]) {
3458 ctlr_info_t *p;
3459
3460 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
3461 if (!p)
3462 goto Enomem;
3463 hba[i] = p;
3464 return i;
3465 }
3466 }
3467 printk(KERN_WARNING "cciss: This driver supports a maximum"
3468 " of %d controllers.\n", MAX_CTLR);
3469 return -1;
3470 Enomem:
3471 printk(KERN_ERR "cciss: out of memory.\n");
3472 return -1;
3473 }
3474
3475 static void free_hba(int i)
3476 {
3477 ctlr_info_t *p = hba[i];
3478 int n;
3479
3480 hba[i] = NULL;
3481 for (n = 0; n < CISS_MAX_LUN; n++)
3482 put_disk(p->gendisk[n]);
3483 kfree(p);
3484 }
3485
3486 /* Send a message CDB to the firmware. */
3487 static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3488 {
3489 typedef struct {
3490 CommandListHeader_struct CommandHeader;
3491 RequestBlock_struct Request;
3492 ErrDescriptor_struct ErrorDescriptor;
3493 } Command;
3494 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3495 Command *cmd;
3496 dma_addr_t paddr64;
3497 uint32_t paddr32, tag;
3498 void __iomem *vaddr;
3499 int i, err;
3500
3501 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3502 if (vaddr == NULL)
3503 return -ENOMEM;
3504
3505 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3506 CCISS commands, so they must be allocated from the lower 4GiB of
3507 memory. */
3508 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3509 if (err) {
3510 iounmap(vaddr);
3511 return -ENOMEM;
3512 }
3513
3514 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3515 if (cmd == NULL) {
3516 iounmap(vaddr);
3517 return -ENOMEM;
3518 }
3519
3520 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3521 although there's no guarantee, we assume that the address is at
3522 least 4-byte aligned (most likely, it's page-aligned). */
3523 paddr32 = paddr64;
3524
3525 cmd->CommandHeader.ReplyQueue = 0;
3526 cmd->CommandHeader.SGList = 0;
3527 cmd->CommandHeader.SGTotal = 0;
3528 cmd->CommandHeader.Tag.lower = paddr32;
3529 cmd->CommandHeader.Tag.upper = 0;
3530 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3531
3532 cmd->Request.CDBLen = 16;
3533 cmd->Request.Type.Type = TYPE_MSG;
3534 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3535 cmd->Request.Type.Direction = XFER_NONE;
3536 cmd->Request.Timeout = 0; /* Don't time out */
3537 cmd->Request.CDB[0] = opcode;
3538 cmd->Request.CDB[1] = type;
3539 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3540
3541 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3542 cmd->ErrorDescriptor.Addr.upper = 0;
3543 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3544
3545 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3546
3547 for (i = 0; i < 10; i++) {
3548 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3549 if ((tag & ~3) == paddr32)
3550 break;
3551 schedule_timeout_uninterruptible(HZ);
3552 }
3553
3554 iounmap(vaddr);
3555
3556 /* we leak the DMA buffer here ... no choice since the controller could
3557 still complete the command. */
3558 if (i == 10) {
3559 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3560 opcode, type);
3561 return -ETIMEDOUT;
3562 }
3563
3564 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3565
3566 if (tag & 2) {
3567 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3568 opcode, type);
3569 return -EIO;
3570 }
3571
3572 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
3573 opcode, type);
3574 return 0;
3575 }
3576
3577 #define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
3578 #define cciss_noop(p) cciss_message(p, 3, 0)
3579
3580 static __devinit int cciss_reset_msi(struct pci_dev *pdev)
3581 {
3582 /* the #defines are stolen from drivers/pci/msi.h. */
3583 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
3584 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
3585
3586 int pos;
3587 u16 control = 0;
3588
3589 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3590 if (pos) {
3591 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3592 if (control & PCI_MSI_FLAGS_ENABLE) {
3593 printk(KERN_INFO "cciss: resetting MSI\n");
3594 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
3595 }
3596 }
3597
3598 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3599 if (pos) {
3600 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3601 if (control & PCI_MSIX_FLAGS_ENABLE) {
3602 printk(KERN_INFO "cciss: resetting MSI-X\n");
3603 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
3604 }
3605 }
3606
3607 return 0;
3608 }
3609
3610 /* This does a hard reset of the controller using PCI power management
3611 * states. */
3612 static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
3613 {
3614 u16 pmcsr, saved_config_space[32];
3615 int i, pos;
3616
3617 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
3618
3619 /* This is very nearly the same thing as
3620
3621 pci_save_state(pci_dev);
3622 pci_set_power_state(pci_dev, PCI_D3hot);
3623 pci_set_power_state(pci_dev, PCI_D0);
3624 pci_restore_state(pci_dev);
3625
3626 but we can't use these nice canned kernel routines on
3627 kexec, because they also check the MSI/MSI-X state in PCI
3628 configuration space and do the wrong thing when it is
3629 set/cleared. Also, the pci_save/restore_state functions
3630 violate the ordering requirements for restoring the
3631 configuration space from the CCISS document (see the
3632 comment below). So we roll our own .... */
3633
3634 for (i = 0; i < 32; i++)
3635 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
3636
3637 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3638 if (pos == 0) {
3639 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
3640 return -ENODEV;
3641 }
3642
3643 /* Quoting from the Open CISS Specification: "The Power
3644 * Management Control/Status Register (CSR) controls the power
3645 * state of the device. The normal operating state is D0,
3646 * CSR=00h. The software off state is D3, CSR=03h. To reset
3647 * the controller, place the interface device in D3 then to
3648 * D0, this causes a secondary PCI reset which will reset the
3649 * controller." */
3650
3651 /* enter the D3hot power management state */
3652 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3653 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3654 pmcsr |= PCI_D3hot;
3655 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3656
3657 schedule_timeout_uninterruptible(HZ >> 1);
3658
3659 /* enter the D0 power management state */
3660 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3661 pmcsr |= PCI_D0;
3662 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3663
3664 schedule_timeout_uninterruptible(HZ >> 1);
3665
3666 /* Restore the PCI configuration space. The Open CISS
3667 * Specification says, "Restore the PCI Configuration
3668 * Registers, offsets 00h through 60h. It is important to
3669 * restore the command register, 16-bits at offset 04h,
3670 * last. Do not restore the configuration status register,
3671 * 16-bits at offset 06h." Note that the offset is 2*i. */
3672 for (i = 0; i < 32; i++) {
3673 if (i == 2 || i == 3)
3674 continue;
3675 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
3676 }
3677 wmb();
3678 pci_write_config_word(pdev, 4, saved_config_space[2]);
3679
3680 return 0;
3681 }
3682
3683 /*
3684 * This is it. Find all the controllers and register them. I really hate
3685 * stealing all these major device numbers.
3686 * returns the number of block devices registered.
3687 */
3688 static int __devinit cciss_init_one(struct pci_dev *pdev,
3689 const struct pci_device_id *ent)
3690 {
3691 int i;
3692 int j = 0;
3693 int rc;
3694 int dac, return_code;
3695 InquiryData_struct *inq_buff = NULL;
3696
3697 if (reset_devices) {
3698 /* Reset the controller with a PCI power-cycle */
3699 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
3700 return -ENODEV;
3701
3702 /* Now try to get the controller to respond to a no-op. Some
3703 devices (notably the HP Smart Array 5i Controller) need
3704 up to 30 seconds to respond. */
3705 for (i=0; i<30; i++) {
3706 if (cciss_noop(pdev) == 0)
3707 break;
3708
3709 schedule_timeout_uninterruptible(HZ);
3710 }
3711 if (i == 30) {
3712 printk(KERN_ERR "cciss: controller seems dead\n");
3713 return -EBUSY;
3714 }
3715 }
3716
3717 i = alloc_cciss_hba();
3718 if (i < 0)
3719 return -1;
3720
3721 hba[i]->busy_initializing = 1;
3722 INIT_HLIST_HEAD(&hba[i]->cmpQ);
3723 INIT_HLIST_HEAD(&hba[i]->reqQ);
3724
3725 if (cciss_pci_init(hba[i], pdev) != 0)
3726 goto clean1;
3727
3728 sprintf(hba[i]->devname, "cciss%d", i);
3729 hba[i]->ctlr = i;
3730 hba[i]->pdev = pdev;
3731
3732 /* configure PCI DMA stuff */
3733 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
3734 dac = 1;
3735 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
3736 dac = 0;
3737 else {
3738 printk(KERN_ERR "cciss: no suitable DMA available\n");
3739 goto clean1;
3740 }
3741
3742 /*
3743 * register with the major number, or get a dynamic major number
3744 * by passing 0 as argument. This is done for greater than
3745 * 8 controller support.
3746 */
3747 if (i < MAX_CTLR_ORIG)
3748 hba[i]->major = COMPAQ_CISS_MAJOR + i;
3749 rc = register_blkdev(hba[i]->major, hba[i]->devname);
3750 if (rc == -EBUSY || rc == -EINVAL) {
3751 printk(KERN_ERR
3752 "cciss: Unable to get major number %d for %s "
3753 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
3754 goto clean1;
3755 } else {
3756 if (i >= MAX_CTLR_ORIG)
3757 hba[i]->major = rc;
3758 }
3759
3760 /* make sure the board interrupts are off */
3761 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
3762 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
3763 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
3764 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
3765 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
3766 goto clean2;
3767 }
3768
3769 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
3770 hba[i]->devname, pdev->device, pci_name(pdev),
3771 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
3772
3773 hba[i]->cmd_pool_bits =
3774 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
3775 * sizeof(unsigned long), GFP_KERNEL);
3776 hba[i]->cmd_pool = (CommandList_struct *)
3777 pci_alloc_consistent(hba[i]->pdev,
3778 hba[i]->nr_cmds * sizeof(CommandList_struct),
3779 &(hba[i]->cmd_pool_dhandle));
3780 hba[i]->errinfo_pool = (ErrorInfo_struct *)
3781 pci_alloc_consistent(hba[i]->pdev,
3782 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
3783 &(hba[i]->errinfo_pool_dhandle));
3784 if ((hba[i]->cmd_pool_bits == NULL)
3785 || (hba[i]->cmd_pool == NULL)
3786 || (hba[i]->errinfo_pool == NULL)) {
3787 printk(KERN_ERR "cciss: out of memory");
3788 goto clean4;
3789 }
3790 #ifdef CONFIG_CISS_SCSI_TAPE
3791 hba[i]->scsi_rejects.complete =
3792 kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
3793 (hba[i]->nr_cmds + 5), GFP_KERNEL);
3794 if (hba[i]->scsi_rejects.complete == NULL) {
3795 printk(KERN_ERR "cciss: out of memory");
3796 goto clean4;
3797 }
3798 #endif
3799 spin_lock_init(&hba[i]->lock);
3800
3801 /* Initialize the pdev driver private data.
3802 have it point to hba[i]. */
3803 pci_set_drvdata(pdev, hba[i]);
3804 /* command and error info recs zeroed out before
3805 they are used */
3806 memset(hba[i]->cmd_pool_bits, 0,
3807 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
3808 * sizeof(unsigned long));
3809
3810 hba[i]->num_luns = 0;
3811 hba[i]->highest_lun = -1;
3812 for (j = 0; j < CISS_MAX_LUN; j++) {
3813 hba[i]->drv[j].raid_level = -1;
3814 hba[i]->drv[j].queue = NULL;
3815 hba[i]->gendisk[j] = NULL;
3816 }
3817
3818 cciss_scsi_setup(i);
3819
3820 /* Turn the interrupts on so we can service requests */
3821 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
3822
3823 /* Get the firmware version */
3824 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
3825 if (inq_buff == NULL) {
3826 printk(KERN_ERR "cciss: out of memory\n");
3827 goto clean4;
3828 }
3829
3830 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
3831 sizeof(InquiryData_struct), 0, 0 , 0, TYPE_CMD);
3832 if (return_code == IO_OK) {
3833 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
3834 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
3835 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
3836 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
3837 } else { /* send command failed */
3838 printk(KERN_WARNING "cciss: unable to determine firmware"
3839 " version of controller\n");
3840 }
3841
3842 cciss_procinit(i);
3843
3844 hba[i]->cciss_max_sectors = 2048;
3845
3846 hba[i]->busy_initializing = 0;
3847
3848 rebuild_lun_table(hba[i], 1);
3849 hba[i]->cciss_scan_thread = kthread_run(scan_thread, hba[i],
3850 "cciss_scan%02d", i);
3851 if (IS_ERR(hba[i]->cciss_scan_thread))
3852 return PTR_ERR(hba[i]->cciss_scan_thread);
3853
3854 return 1;
3855
3856 clean4:
3857 kfree(inq_buff);
3858 #ifdef CONFIG_CISS_SCSI_TAPE
3859 kfree(hba[i]->scsi_rejects.complete);
3860 #endif
3861 kfree(hba[i]->cmd_pool_bits);
3862 if (hba[i]->cmd_pool)
3863 pci_free_consistent(hba[i]->pdev,
3864 hba[i]->nr_cmds * sizeof(CommandList_struct),
3865 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3866 if (hba[i]->errinfo_pool)
3867 pci_free_consistent(hba[i]->pdev,
3868 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
3869 hba[i]->errinfo_pool,
3870 hba[i]->errinfo_pool_dhandle);
3871 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
3872 clean2:
3873 unregister_blkdev(hba[i]->major, hba[i]->devname);
3874 clean1:
3875 hba[i]->busy_initializing = 0;
3876 /* cleanup any queues that may have been initialized */
3877 for (j=0; j <= hba[i]->highest_lun; j++){
3878 drive_info_struct *drv = &(hba[i]->drv[j]);
3879 if (drv->queue)
3880 blk_cleanup_queue(drv->queue);
3881 }
3882 /*
3883 * Deliberately omit pci_disable_device(): it does something nasty to
3884 * Smart Array controllers that pci_enable_device does not undo
3885 */
3886 pci_release_regions(pdev);
3887 pci_set_drvdata(pdev, NULL);
3888 free_hba(i);
3889 return -1;
3890 }
3891
3892 static void cciss_shutdown(struct pci_dev *pdev)
3893 {
3894 ctlr_info_t *tmp_ptr;
3895 int i;
3896 char flush_buf[4];
3897 int return_code;
3898
3899 tmp_ptr = pci_get_drvdata(pdev);
3900 if (tmp_ptr == NULL)
3901 return;
3902 i = tmp_ptr->ctlr;
3903 if (hba[i] == NULL)
3904 return;
3905
3906 /* Turn board interrupts off and send the flush cache command */
3907 /* sendcmd will turn off interrupt, and send the flush...
3908 * To write all data in the battery backed cache to disks */
3909 memset(flush_buf, 0, 4);
3910 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
3911 TYPE_CMD);
3912 if (return_code == IO_OK) {
3913 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
3914 } else {
3915 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
3916 }
3917 free_irq(hba[i]->intr[2], hba[i]);
3918 }
3919
3920 static void __devexit cciss_remove_one(struct pci_dev *pdev)
3921 {
3922 ctlr_info_t *tmp_ptr;
3923 int i, j;
3924
3925 if (pci_get_drvdata(pdev) == NULL) {
3926 printk(KERN_ERR "cciss: Unable to remove device \n");
3927 return;
3928 }
3929
3930 tmp_ptr = pci_get_drvdata(pdev);
3931 i = tmp_ptr->ctlr;
3932 if (hba[i] == NULL) {
3933 printk(KERN_ERR "cciss: device appears to "
3934 "already be removed \n");
3935 return;
3936 }
3937
3938 kthread_stop(hba[i]->cciss_scan_thread);
3939
3940 remove_proc_entry(hba[i]->devname, proc_cciss);
3941 unregister_blkdev(hba[i]->major, hba[i]->devname);
3942
3943 /* remove it from the disk list */
3944 for (j = 0; j < CISS_MAX_LUN; j++) {
3945 struct gendisk *disk = hba[i]->gendisk[j];
3946 if (disk) {
3947 struct request_queue *q = disk->queue;
3948
3949 if (disk->flags & GENHD_FL_UP)
3950 del_gendisk(disk);
3951 if (q)
3952 blk_cleanup_queue(q);
3953 }
3954 }
3955
3956 #ifdef CONFIG_CISS_SCSI_TAPE
3957 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
3958 #endif
3959
3960 cciss_shutdown(pdev);
3961
3962 #ifdef CONFIG_PCI_MSI
3963 if (hba[i]->msix_vector)
3964 pci_disable_msix(hba[i]->pdev);
3965 else if (hba[i]->msi_vector)
3966 pci_disable_msi(hba[i]->pdev);
3967 #endif /* CONFIG_PCI_MSI */
3968
3969 iounmap(hba[i]->vaddr);
3970
3971 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
3972 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
3973 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
3974 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
3975 kfree(hba[i]->cmd_pool_bits);
3976 #ifdef CONFIG_CISS_SCSI_TAPE
3977 kfree(hba[i]->scsi_rejects.complete);
3978 #endif
3979 /*
3980 * Deliberately omit pci_disable_device(): it does something nasty to
3981 * Smart Array controllers that pci_enable_device does not undo
3982 */
3983 pci_release_regions(pdev);
3984 pci_set_drvdata(pdev, NULL);
3985 free_hba(i);
3986 }
3987
3988 static struct pci_driver cciss_pci_driver = {
3989 .name = "cciss",
3990 .probe = cciss_init_one,
3991 .remove = __devexit_p(cciss_remove_one),
3992 .id_table = cciss_pci_device_id, /* id_table */
3993 .shutdown = cciss_shutdown,
3994 };
3995
3996 /*
3997 * This is it. Register the PCI driver information for the cards we control
3998 * the OS will call our registered routines when it finds one of our cards.
3999 */
4000 static int __init cciss_init(void)
4001 {
4002 /*
4003 * The hardware requires that commands are aligned on a 64-bit
4004 * boundary. Given that we use pci_alloc_consistent() to allocate an
4005 * array of them, the size must be a multiple of 8 bytes.
4006 */
4007 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4008
4009 printk(KERN_INFO DRIVER_NAME "\n");
4010
4011 /* Register for our PCI devices */
4012 return pci_register_driver(&cciss_pci_driver);
4013 }
4014
4015 static void __exit cciss_cleanup(void)
4016 {
4017 int i;
4018
4019 pci_unregister_driver(&cciss_pci_driver);
4020 /* double check that all controller entrys have been removed */
4021 for (i = 0; i < MAX_CTLR; i++) {
4022 if (hba[i] != NULL) {
4023 printk(KERN_WARNING "cciss: had to remove"
4024 " controller %d\n", i);
4025 cciss_remove_one(hba[i]->pdev);
4026 }
4027 }
4028 remove_proc_entry("driver/cciss", NULL);
4029 }
4030
4031 static void fail_all_cmds(unsigned long ctlr)
4032 {
4033 /* If we get here, the board is apparently dead. */
4034 ctlr_info_t *h = hba[ctlr];
4035 CommandList_struct *c;
4036 unsigned long flags;
4037
4038 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
4039 h->alive = 0; /* the controller apparently died... */
4040
4041 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4042
4043 pci_disable_device(h->pdev); /* Make sure it is really dead. */
4044
4045 /* move everything off the request queue onto the completed queue */
4046 while (!hlist_empty(&h->reqQ)) {
4047 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4048 removeQ(c);
4049 h->Qdepth--;
4050 addQ(&h->cmpQ, c);
4051 }
4052
4053 /* Now, fail everything on the completed queue with a HW error */
4054 while (!hlist_empty(&h->cmpQ)) {
4055 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4056 removeQ(c);
4057 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4058 if (c->cmd_type == CMD_RWREQ) {
4059 complete_command(h, c, 0);
4060 } else if (c->cmd_type == CMD_IOCTL_PEND)
4061 complete(c->waiting);
4062 #ifdef CONFIG_CISS_SCSI_TAPE
4063 else if (c->cmd_type == CMD_SCSI)
4064 complete_scsi_command(c, 0, 0);
4065 #endif
4066 }
4067 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4068 return;
4069 }
4070
4071 module_init(cciss_init);
4072 module_exit(cciss_cleanup);
Support for the Chinese Samsung S3C2440 based development boards