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Linux 2.6.33.13
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / block / cciss.c
blob9291614ac6b7efd70adec484b6117c3de7b0974c
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/smp_lock.h>
30 #include <linux/delay.h>
31 #include <linux/major.h>
32 #include <linux/fs.h>
33 #include <linux/bio.h>
34 #include <linux/blkpg.h>
35 #include <linux/timer.h>
36 #include <linux/proc_fs.h>
37 #include <linux/seq_file.h>
38 #include <linux/init.h>
39 #include <linux/jiffies.h>
40 #include <linux/hdreg.h>
41 #include <linux/spinlock.h>
42 #include <linux/compat.h>
43 #include <linux/mutex.h>
44 #include <asm/uaccess.h>
45 #include <asm/io.h>
46
47 #include <linux/dma-mapping.h>
48 #include <linux/blkdev.h>
49 #include <linux/genhd.h>
50 #include <linux/completion.h>
51 #include <scsi/scsi.h>
52 #include <scsi/sg.h>
53 #include <scsi/scsi_ioctl.h>
54 #include <linux/cdrom.h>
55 #include <linux/scatterlist.h>
56 #include <linux/kthread.h>
57
58 #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
59 #define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60 #define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
61
62 /* Embedded module documentation macros - see modules.h */
63 MODULE_AUTHOR("Hewlett-Packard Company");
64 MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
65 MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68 MODULE_VERSION("3.6.20");
69 MODULE_LICENSE("GPL");
70
71 static int cciss_allow_hpsa;
72 module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
73 MODULE_PARM_DESC(cciss_allow_hpsa,
74 "Prevent cciss driver from accessing hardware known to be "
75 " supported by the hpsa driver");
76
77 #include "cciss_cmd.h"
78 #include "cciss.h"
79 #include <linux/cciss_ioctl.h>
80
81 /* define the PCI info for the cards we can control */
82 static const struct pci_device_id cciss_pci_device_id[] = {
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
86 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
87 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
88 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
89 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
90 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
91 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
110 {0,}
111 };
112
113 MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
114
115 /* board_id = Subsystem Device ID & Vendor ID
116 * product = Marketing Name for the board
117 * access = Address of the struct of function pointers
118 */
119 static struct board_type products[] = {
120 {0x40700E11, "Smart Array 5300", &SA5_access},
121 {0x40800E11, "Smart Array 5i", &SA5B_access},
122 {0x40820E11, "Smart Array 532", &SA5B_access},
123 {0x40830E11, "Smart Array 5312", &SA5B_access},
124 {0x409A0E11, "Smart Array 641", &SA5_access},
125 {0x409B0E11, "Smart Array 642", &SA5_access},
126 {0x409C0E11, "Smart Array 6400", &SA5_access},
127 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
128 {0x40910E11, "Smart Array 6i", &SA5_access},
129 {0x3225103C, "Smart Array P600", &SA5_access},
130 {0x3235103C, "Smart Array P400i", &SA5_access},
131 {0x3211103C, "Smart Array E200i", &SA5_access},
132 {0x3212103C, "Smart Array E200", &SA5_access},
133 {0x3213103C, "Smart Array E200i", &SA5_access},
134 {0x3214103C, "Smart Array E200i", &SA5_access},
135 {0x3215103C, "Smart Array E200i", &SA5_access},
136 {0x3237103C, "Smart Array E500", &SA5_access},
137 /* controllers below this line are also supported by the hpsa driver. */
138 #define HPSA_BOUNDARY 0x3223103C
139 {0x3223103C, "Smart Array P800", &SA5_access},
140 {0x3234103C, "Smart Array P400", &SA5_access},
141 {0x323D103C, "Smart Array P700m", &SA5_access},
142 {0x3241103C, "Smart Array P212", &SA5_access},
143 {0x3243103C, "Smart Array P410", &SA5_access},
144 {0x3245103C, "Smart Array P410i", &SA5_access},
145 {0x3247103C, "Smart Array P411", &SA5_access},
146 {0x3249103C, "Smart Array P812", &SA5_access},
147 {0x324A103C, "Smart Array P712m", &SA5_access},
148 {0x324B103C, "Smart Array P711m", &SA5_access},
149 };
150
151 /* How long to wait (in milliseconds) for board to go into simple mode */
152 #define MAX_CONFIG_WAIT 30000
153 #define MAX_IOCTL_CONFIG_WAIT 1000
154
155 /*define how many times we will try a command because of bus resets */
156 #define MAX_CMD_RETRIES 3
157
158 #define MAX_CTLR 32
159
160 /* Originally cciss driver only supports 8 major numbers */
161 #define MAX_CTLR_ORIG 8
162
163 static ctlr_info_t *hba[MAX_CTLR];
164
165 static struct task_struct *cciss_scan_thread;
166 static DEFINE_MUTEX(scan_mutex);
167 static LIST_HEAD(scan_q);
168
169 static void do_cciss_request(struct request_queue *q);
170 static irqreturn_t do_cciss_intr(int irq, void *dev_id);
171 static int cciss_open(struct block_device *bdev, fmode_t mode);
172 static int cciss_release(struct gendisk *disk, fmode_t mode);
173 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
174 unsigned int cmd, unsigned long arg);
175 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
176
177 static int cciss_revalidate(struct gendisk *disk);
178 static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
179 static int deregister_disk(ctlr_info_t *h, int drv_index,
180 int clear_all, int via_ioctl);
181
182 static void cciss_read_capacity(int ctlr, int logvol,
183 sector_t *total_size, unsigned int *block_size);
184 static void cciss_read_capacity_16(int ctlr, int logvol,
185 sector_t *total_size, unsigned int *block_size);
186 static void cciss_geometry_inquiry(int ctlr, int logvol,
187 sector_t total_size,
188 unsigned int block_size, InquiryData_struct *inq_buff,
189 drive_info_struct *drv);
190 static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
191 __u32);
192 static void start_io(ctlr_info_t *h);
193 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
194 __u8 page_code, unsigned char scsi3addr[],
195 int cmd_type);
196 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
197 int attempt_retry);
198 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
199
200 static void fail_all_cmds(unsigned long ctlr);
201 static int add_to_scan_list(struct ctlr_info *h);
202 static int scan_thread(void *data);
203 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
204 static void cciss_hba_release(struct device *dev);
205 static void cciss_device_release(struct device *dev);
206 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
207 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
208
209 #ifdef CONFIG_PROC_FS
210 static void cciss_procinit(int i);
211 #else
212 static void cciss_procinit(int i)
213 {
214 }
215 #endif /* CONFIG_PROC_FS */
216
217 #ifdef CONFIG_COMPAT
218 static int cciss_compat_ioctl(struct block_device *, fmode_t,
219 unsigned, unsigned long);
220 #endif
221
222 static const struct block_device_operations cciss_fops = {
223 .owner = THIS_MODULE,
224 .open = cciss_open,
225 .release = cciss_release,
226 .locked_ioctl = cciss_ioctl,
227 .getgeo = cciss_getgeo,
228 #ifdef CONFIG_COMPAT
229 .compat_ioctl = cciss_compat_ioctl,
230 #endif
231 .revalidate_disk = cciss_revalidate,
232 };
233
234 /*
235 * Enqueuing and dequeuing functions for cmdlists.
236 */
237 static inline void addQ(struct hlist_head *list, CommandList_struct *c)
238 {
239 hlist_add_head(&c->list, list);
240 }
241
242 static inline void removeQ(CommandList_struct *c)
243 {
244 /*
245 * After kexec/dump some commands might still
246 * be in flight, which the firmware will try
247 * to complete. Resetting the firmware doesn't work
248 * with old fw revisions, so we have to mark
249 * them off as 'stale' to prevent the driver from
250 * falling over.
251 */
252 if (WARN_ON(hlist_unhashed(&c->list))) {
253 c->cmd_type = CMD_MSG_STALE;
254 return;
255 }
256
257 hlist_del_init(&c->list);
258 }
259
260 #include "cciss_scsi.c" /* For SCSI tape support */
261
262 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
263 "UNKNOWN"
264 };
265 #define RAID_UNKNOWN (sizeof(raid_label) / sizeof(raid_label[0])-1)
266
267 #ifdef CONFIG_PROC_FS
268
269 /*
270 * Report information about this controller.
271 */
272 #define ENG_GIG 1000000000
273 #define ENG_GIG_FACTOR (ENG_GIG/512)
274 #define ENGAGE_SCSI "engage scsi"
275
276 static struct proc_dir_entry *proc_cciss;
277
278 static void cciss_seq_show_header(struct seq_file *seq)
279 {
280 ctlr_info_t *h = seq->private;
281
282 seq_printf(seq, "%s: HP %s Controller\n"
283 "Board ID: 0x%08lx\n"
284 "Firmware Version: %c%c%c%c\n"
285 "IRQ: %d\n"
286 "Logical drives: %d\n"
287 "Current Q depth: %d\n"
288 "Current # commands on controller: %d\n"
289 "Max Q depth since init: %d\n"
290 "Max # commands on controller since init: %d\n"
291 "Max SG entries since init: %d\n",
292 h->devname,
293 h->product_name,
294 (unsigned long)h->board_id,
295 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
296 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
297 h->num_luns,
298 h->Qdepth, h->commands_outstanding,
299 h->maxQsinceinit, h->max_outstanding, h->maxSG);
300
301 #ifdef CONFIG_CISS_SCSI_TAPE
302 cciss_seq_tape_report(seq, h->ctlr);
303 #endif /* CONFIG_CISS_SCSI_TAPE */
304 }
305
306 static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
307 {
308 ctlr_info_t *h = seq->private;
309 unsigned ctlr = h->ctlr;
310 unsigned long flags;
311
312 /* prevent displaying bogus info during configuration
313 * or deconfiguration of a logical volume
314 */
315 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
316 if (h->busy_configuring) {
317 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
318 return ERR_PTR(-EBUSY);
319 }
320 h->busy_configuring = 1;
321 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
322
323 if (*pos == 0)
324 cciss_seq_show_header(seq);
325
326 return pos;
327 }
328
329 static int cciss_seq_show(struct seq_file *seq, void *v)
330 {
331 sector_t vol_sz, vol_sz_frac;
332 ctlr_info_t *h = seq->private;
333 unsigned ctlr = h->ctlr;
334 loff_t *pos = v;
335 drive_info_struct *drv = h->drv[*pos];
336
337 if (*pos > h->highest_lun)
338 return 0;
339
340 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
341 return 0;
342
343 if (drv->heads == 0)
344 return 0;
345
346 vol_sz = drv->nr_blocks;
347 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
348 vol_sz_frac *= 100;
349 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
350
351 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
352 drv->raid_level = RAID_UNKNOWN;
353 seq_printf(seq, "cciss/c%dd%d:"
354 "\t%4u.%02uGB\tRAID %s\n",
355 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
356 raid_label[drv->raid_level]);
357 return 0;
358 }
359
360 static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
361 {
362 ctlr_info_t *h = seq->private;
363
364 if (*pos > h->highest_lun)
365 return NULL;
366 *pos += 1;
367
368 return pos;
369 }
370
371 static void cciss_seq_stop(struct seq_file *seq, void *v)
372 {
373 ctlr_info_t *h = seq->private;
374
375 /* Only reset h->busy_configuring if we succeeded in setting
376 * it during cciss_seq_start. */
377 if (v == ERR_PTR(-EBUSY))
378 return;
379
380 h->busy_configuring = 0;
381 }
382
383 static const struct seq_operations cciss_seq_ops = {
384 .start = cciss_seq_start,
385 .show = cciss_seq_show,
386 .next = cciss_seq_next,
387 .stop = cciss_seq_stop,
388 };
389
390 static int cciss_seq_open(struct inode *inode, struct file *file)
391 {
392 int ret = seq_open(file, &cciss_seq_ops);
393 struct seq_file *seq = file->private_data;
394
395 if (!ret)
396 seq->private = PDE(inode)->data;
397
398 return ret;
399 }
400
401 static ssize_t
402 cciss_proc_write(struct file *file, const char __user *buf,
403 size_t length, loff_t *ppos)
404 {
405 int err;
406 char *buffer;
407
408 #ifndef CONFIG_CISS_SCSI_TAPE
409 return -EINVAL;
410 #endif
411
412 if (!buf || length > PAGE_SIZE - 1)
413 return -EINVAL;
414
415 buffer = (char *)__get_free_page(GFP_KERNEL);
416 if (!buffer)
417 return -ENOMEM;
418
419 err = -EFAULT;
420 if (copy_from_user(buffer, buf, length))
421 goto out;
422 buffer[length] = '\0';
423
424 #ifdef CONFIG_CISS_SCSI_TAPE
425 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
426 struct seq_file *seq = file->private_data;
427 ctlr_info_t *h = seq->private;
428
429 err = cciss_engage_scsi(h->ctlr);
430 if (err == 0)
431 err = length;
432 } else
433 #endif /* CONFIG_CISS_SCSI_TAPE */
434 err = -EINVAL;
435 /* might be nice to have "disengage" too, but it's not
436 safely possible. (only 1 module use count, lock issues.) */
437
438 out:
439 free_page((unsigned long)buffer);
440 return err;
441 }
442
443 static const struct file_operations cciss_proc_fops = {
444 .owner = THIS_MODULE,
445 .open = cciss_seq_open,
446 .read = seq_read,
447 .llseek = seq_lseek,
448 .release = seq_release,
449 .write = cciss_proc_write,
450 };
451
452 static void __devinit cciss_procinit(int i)
453 {
454 struct proc_dir_entry *pde;
455
456 if (proc_cciss == NULL)
457 proc_cciss = proc_mkdir("driver/cciss", NULL);
458 if (!proc_cciss)
459 return;
460 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
461 S_IROTH, proc_cciss,
462 &cciss_proc_fops, hba[i]);
463 }
464 #endif /* CONFIG_PROC_FS */
465
466 #define MAX_PRODUCT_NAME_LEN 19
467
468 #define to_hba(n) container_of(n, struct ctlr_info, dev)
469 #define to_drv(n) container_of(n, drive_info_struct, dev)
470
471 static ssize_t host_store_rescan(struct device *dev,
472 struct device_attribute *attr,
473 const char *buf, size_t count)
474 {
475 struct ctlr_info *h = to_hba(dev);
476
477 add_to_scan_list(h);
478 wake_up_process(cciss_scan_thread);
479 wait_for_completion_interruptible(&h->scan_wait);
480
481 return count;
482 }
483 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
484
485 static ssize_t dev_show_unique_id(struct device *dev,
486 struct device_attribute *attr,
487 char *buf)
488 {
489 drive_info_struct *drv = to_drv(dev);
490 struct ctlr_info *h = to_hba(drv->dev.parent);
491 __u8 sn[16];
492 unsigned long flags;
493 int ret = 0;
494
495 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
496 if (h->busy_configuring)
497 ret = -EBUSY;
498 else
499 memcpy(sn, drv->serial_no, sizeof(sn));
500 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
501
502 if (ret)
503 return ret;
504 else
505 return snprintf(buf, 16 * 2 + 2,
506 "%02X%02X%02X%02X%02X%02X%02X%02X"
507 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
508 sn[0], sn[1], sn[2], sn[3],
509 sn[4], sn[5], sn[6], sn[7],
510 sn[8], sn[9], sn[10], sn[11],
511 sn[12], sn[13], sn[14], sn[15]);
512 }
513 static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
514
515 static ssize_t dev_show_vendor(struct device *dev,
516 struct device_attribute *attr,
517 char *buf)
518 {
519 drive_info_struct *drv = to_drv(dev);
520 struct ctlr_info *h = to_hba(drv->dev.parent);
521 char vendor[VENDOR_LEN + 1];
522 unsigned long flags;
523 int ret = 0;
524
525 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
526 if (h->busy_configuring)
527 ret = -EBUSY;
528 else
529 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
530 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
531
532 if (ret)
533 return ret;
534 else
535 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
536 }
537 static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
538
539 static ssize_t dev_show_model(struct device *dev,
540 struct device_attribute *attr,
541 char *buf)
542 {
543 drive_info_struct *drv = to_drv(dev);
544 struct ctlr_info *h = to_hba(drv->dev.parent);
545 char model[MODEL_LEN + 1];
546 unsigned long flags;
547 int ret = 0;
548
549 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
550 if (h->busy_configuring)
551 ret = -EBUSY;
552 else
553 memcpy(model, drv->model, MODEL_LEN + 1);
554 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
555
556 if (ret)
557 return ret;
558 else
559 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
560 }
561 static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
562
563 static ssize_t dev_show_rev(struct device *dev,
564 struct device_attribute *attr,
565 char *buf)
566 {
567 drive_info_struct *drv = to_drv(dev);
568 struct ctlr_info *h = to_hba(drv->dev.parent);
569 char rev[REV_LEN + 1];
570 unsigned long flags;
571 int ret = 0;
572
573 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
574 if (h->busy_configuring)
575 ret = -EBUSY;
576 else
577 memcpy(rev, drv->rev, REV_LEN + 1);
578 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
579
580 if (ret)
581 return ret;
582 else
583 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
584 }
585 static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
586
587 static ssize_t cciss_show_lunid(struct device *dev,
588 struct device_attribute *attr, char *buf)
589 {
590 drive_info_struct *drv = to_drv(dev);
591 struct ctlr_info *h = to_hba(drv->dev.parent);
592 unsigned long flags;
593 unsigned char lunid[8];
594
595 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
596 if (h->busy_configuring) {
597 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
598 return -EBUSY;
599 }
600 if (!drv->heads) {
601 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
602 return -ENOTTY;
603 }
604 memcpy(lunid, drv->LunID, sizeof(lunid));
605 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
606 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
607 lunid[0], lunid[1], lunid[2], lunid[3],
608 lunid[4], lunid[5], lunid[6], lunid[7]);
609 }
610 static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
611
612 static ssize_t cciss_show_raid_level(struct device *dev,
613 struct device_attribute *attr, char *buf)
614 {
615 drive_info_struct *drv = to_drv(dev);
616 struct ctlr_info *h = to_hba(drv->dev.parent);
617 int raid;
618 unsigned long flags;
619
620 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
621 if (h->busy_configuring) {
622 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
623 return -EBUSY;
624 }
625 raid = drv->raid_level;
626 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
627 if (raid < 0 || raid > RAID_UNKNOWN)
628 raid = RAID_UNKNOWN;
629
630 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
631 raid_label[raid]);
632 }
633 static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
634
635 static ssize_t cciss_show_usage_count(struct device *dev,
636 struct device_attribute *attr, char *buf)
637 {
638 drive_info_struct *drv = to_drv(dev);
639 struct ctlr_info *h = to_hba(drv->dev.parent);
640 unsigned long flags;
641 int count;
642
643 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
644 if (h->busy_configuring) {
645 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
646 return -EBUSY;
647 }
648 count = drv->usage_count;
649 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
650 return snprintf(buf, 20, "%d\n", count);
651 }
652 static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
653
654 static struct attribute *cciss_host_attrs[] = {
655 &dev_attr_rescan.attr,
656 NULL
657 };
658
659 static struct attribute_group cciss_host_attr_group = {
660 .attrs = cciss_host_attrs,
661 };
662
663 static const struct attribute_group *cciss_host_attr_groups[] = {
664 &cciss_host_attr_group,
665 NULL
666 };
667
668 static struct device_type cciss_host_type = {
669 .name = "cciss_host",
670 .groups = cciss_host_attr_groups,
671 .release = cciss_hba_release,
672 };
673
674 static struct attribute *cciss_dev_attrs[] = {
675 &dev_attr_unique_id.attr,
676 &dev_attr_model.attr,
677 &dev_attr_vendor.attr,
678 &dev_attr_rev.attr,
679 &dev_attr_lunid.attr,
680 &dev_attr_raid_level.attr,
681 &dev_attr_usage_count.attr,
682 NULL
683 };
684
685 static struct attribute_group cciss_dev_attr_group = {
686 .attrs = cciss_dev_attrs,
687 };
688
689 static const struct attribute_group *cciss_dev_attr_groups[] = {
690 &cciss_dev_attr_group,
691 NULL
692 };
693
694 static struct device_type cciss_dev_type = {
695 .name = "cciss_device",
696 .groups = cciss_dev_attr_groups,
697 .release = cciss_device_release,
698 };
699
700 static struct bus_type cciss_bus_type = {
701 .name = "cciss",
702 };
703
704 /*
705 * cciss_hba_release is called when the reference count
706 * of h->dev goes to zero.
707 */
708 static void cciss_hba_release(struct device *dev)
709 {
710 /*
711 * nothing to do, but need this to avoid a warning
712 * about not having a release handler from lib/kref.c.
713 */
714 }
715
716 /*
717 * Initialize sysfs entry for each controller. This sets up and registers
718 * the 'cciss#' directory for each individual controller under
719 * /sys/bus/pci/devices/<dev>/.
720 */
721 static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
722 {
723 device_initialize(&h->dev);
724 h->dev.type = &cciss_host_type;
725 h->dev.bus = &cciss_bus_type;
726 dev_set_name(&h->dev, "%s", h->devname);
727 h->dev.parent = &h->pdev->dev;
728
729 return device_add(&h->dev);
730 }
731
732 /*
733 * Remove sysfs entries for an hba.
734 */
735 static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
736 {
737 device_del(&h->dev);
738 put_device(&h->dev); /* final put. */
739 }
740
741 /* cciss_device_release is called when the reference count
742 * of h->drv[x]dev goes to zero.
743 */
744 static void cciss_device_release(struct device *dev)
745 {
746 drive_info_struct *drv = to_drv(dev);
747 kfree(drv);
748 }
749
750 /*
751 * Initialize sysfs for each logical drive. This sets up and registers
752 * the 'c#d#' directory for each individual logical drive under
753 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
754 * /sys/block/cciss!c#d# to this entry.
755 */
756 static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
757 int drv_index)
758 {
759 struct device *dev;
760
761 if (h->drv[drv_index]->device_initialized)
762 return 0;
763
764 dev = &h->drv[drv_index]->dev;
765 device_initialize(dev);
766 dev->type = &cciss_dev_type;
767 dev->bus = &cciss_bus_type;
768 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
769 dev->parent = &h->dev;
770 h->drv[drv_index]->device_initialized = 1;
771 return device_add(dev);
772 }
773
774 /*
775 * Remove sysfs entries for a logical drive.
776 */
777 static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
778 int ctlr_exiting)
779 {
780 struct device *dev = &h->drv[drv_index]->dev;
781
782 /* special case for c*d0, we only destroy it on controller exit */
783 if (drv_index == 0 && !ctlr_exiting)
784 return;
785
786 device_del(dev);
787 put_device(dev); /* the "final" put. */
788 h->drv[drv_index] = NULL;
789 }
790
791 /*
792 * For operations that cannot sleep, a command block is allocated at init,
793 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
794 * which ones are free or in use. For operations that can wait for kmalloc
795 * to possible sleep, this routine can be called with get_from_pool set to 0.
796 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
797 */
798 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
799 {
800 CommandList_struct *c;
801 int i;
802 u64bit temp64;
803 dma_addr_t cmd_dma_handle, err_dma_handle;
804
805 if (!get_from_pool) {
806 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
807 sizeof(CommandList_struct), &cmd_dma_handle);
808 if (c == NULL)
809 return NULL;
810 memset(c, 0, sizeof(CommandList_struct));
811
812 c->cmdindex = -1;
813
814 c->err_info = (ErrorInfo_struct *)
815 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
816 &err_dma_handle);
817
818 if (c->err_info == NULL) {
819 pci_free_consistent(h->pdev,
820 sizeof(CommandList_struct), c, cmd_dma_handle);
821 return NULL;
822 }
823 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
824 } else { /* get it out of the controllers pool */
825
826 do {
827 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
828 if (i == h->nr_cmds)
829 return NULL;
830 } while (test_and_set_bit
831 (i & (BITS_PER_LONG - 1),
832 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
833 #ifdef CCISS_DEBUG
834 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
835 #endif
836 c = h->cmd_pool + i;
837 memset(c, 0, sizeof(CommandList_struct));
838 cmd_dma_handle = h->cmd_pool_dhandle
839 + i * sizeof(CommandList_struct);
840 c->err_info = h->errinfo_pool + i;
841 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
842 err_dma_handle = h->errinfo_pool_dhandle
843 + i * sizeof(ErrorInfo_struct);
844 h->nr_allocs++;
845
846 c->cmdindex = i;
847 }
848
849 INIT_HLIST_NODE(&c->list);
850 c->busaddr = (__u32) cmd_dma_handle;
851 temp64.val = (__u64) err_dma_handle;
852 c->ErrDesc.Addr.lower = temp64.val32.lower;
853 c->ErrDesc.Addr.upper = temp64.val32.upper;
854 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
855
856 c->ctlr = h->ctlr;
857 return c;
858 }
859
860 /*
861 * Frees a command block that was previously allocated with cmd_alloc().
862 */
863 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
864 {
865 int i;
866 u64bit temp64;
867
868 if (!got_from_pool) {
869 temp64.val32.lower = c->ErrDesc.Addr.lower;
870 temp64.val32.upper = c->ErrDesc.Addr.upper;
871 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
872 c->err_info, (dma_addr_t) temp64.val);
873 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
874 c, (dma_addr_t) c->busaddr);
875 } else {
876 i = c - h->cmd_pool;
877 clear_bit(i & (BITS_PER_LONG - 1),
878 h->cmd_pool_bits + (i / BITS_PER_LONG));
879 h->nr_frees++;
880 }
881 }
882
883 static inline ctlr_info_t *get_host(struct gendisk *disk)
884 {
885 return disk->queue->queuedata;
886 }
887
888 static inline drive_info_struct *get_drv(struct gendisk *disk)
889 {
890 return disk->private_data;
891 }
892
893 /*
894 * Open. Make sure the device is really there.
895 */
896 static int cciss_open(struct block_device *bdev, fmode_t mode)
897 {
898 ctlr_info_t *host = get_host(bdev->bd_disk);
899 drive_info_struct *drv = get_drv(bdev->bd_disk);
900
901 #ifdef CCISS_DEBUG
902 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
903 #endif /* CCISS_DEBUG */
904
905 if (drv->busy_configuring)
906 return -EBUSY;
907 /*
908 * Root is allowed to open raw volume zero even if it's not configured
909 * so array config can still work. Root is also allowed to open any
910 * volume that has a LUN ID, so it can issue IOCTL to reread the
911 * disk information. I don't think I really like this
912 * but I'm already using way to many device nodes to claim another one
913 * for "raw controller".
914 */
915 if (drv->heads == 0) {
916 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
917 /* if not node 0 make sure it is a partition = 0 */
918 if (MINOR(bdev->bd_dev) & 0x0f) {
919 return -ENXIO;
920 /* if it is, make sure we have a LUN ID */
921 } else if (memcmp(drv->LunID, CTLR_LUNID,
922 sizeof(drv->LunID))) {
923 return -ENXIO;
924 }
925 }
926 if (!capable(CAP_SYS_ADMIN))
927 return -EPERM;
928 }
929 drv->usage_count++;
930 host->usage_count++;
931 return 0;
932 }
933
934 /*
935 * Close. Sync first.
936 */
937 static int cciss_release(struct gendisk *disk, fmode_t mode)
938 {
939 ctlr_info_t *host = get_host(disk);
940 drive_info_struct *drv = get_drv(disk);
941
942 #ifdef CCISS_DEBUG
943 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
944 #endif /* CCISS_DEBUG */
945
946 drv->usage_count--;
947 host->usage_count--;
948 return 0;
949 }
950
951 #ifdef CONFIG_COMPAT
952
953 static int do_ioctl(struct block_device *bdev, fmode_t mode,
954 unsigned cmd, unsigned long arg)
955 {
956 int ret;
957 lock_kernel();
958 ret = cciss_ioctl(bdev, mode, cmd, arg);
959 unlock_kernel();
960 return ret;
961 }
962
963 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
964 unsigned cmd, unsigned long arg);
965 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
966 unsigned cmd, unsigned long arg);
967
968 static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
969 unsigned cmd, unsigned long arg)
970 {
971 switch (cmd) {
972 case CCISS_GETPCIINFO:
973 case CCISS_GETINTINFO:
974 case CCISS_SETINTINFO:
975 case CCISS_GETNODENAME:
976 case CCISS_SETNODENAME:
977 case CCISS_GETHEARTBEAT:
978 case CCISS_GETBUSTYPES:
979 case CCISS_GETFIRMVER:
980 case CCISS_GETDRIVVER:
981 case CCISS_REVALIDVOLS:
982 case CCISS_DEREGDISK:
983 case CCISS_REGNEWDISK:
984 case CCISS_REGNEWD:
985 case CCISS_RESCANDISK:
986 case CCISS_GETLUNINFO:
987 return do_ioctl(bdev, mode, cmd, arg);
988
989 case CCISS_PASSTHRU32:
990 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
991 case CCISS_BIG_PASSTHRU32:
992 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
993
994 default:
995 return -ENOIOCTLCMD;
996 }
997 }
998
999 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1000 unsigned cmd, unsigned long arg)
1001 {
1002 IOCTL32_Command_struct __user *arg32 =
1003 (IOCTL32_Command_struct __user *) arg;
1004 IOCTL_Command_struct arg64;
1005 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1006 int err;
1007 u32 cp;
1008
1009 err = 0;
1010 err |=
1011 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1012 sizeof(arg64.LUN_info));
1013 err |=
1014 copy_from_user(&arg64.Request, &arg32->Request,
1015 sizeof(arg64.Request));
1016 err |=
1017 copy_from_user(&arg64.error_info, &arg32->error_info,
1018 sizeof(arg64.error_info));
1019 err |= get_user(arg64.buf_size, &arg32->buf_size);
1020 err |= get_user(cp, &arg32->buf);
1021 arg64.buf = compat_ptr(cp);
1022 err |= copy_to_user(p, &arg64, sizeof(arg64));
1023
1024 if (err)
1025 return -EFAULT;
1026
1027 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1028 if (err)
1029 return err;
1030 err |=
1031 copy_in_user(&arg32->error_info, &p->error_info,
1032 sizeof(arg32->error_info));
1033 if (err)
1034 return -EFAULT;
1035 return err;
1036 }
1037
1038 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1039 unsigned cmd, unsigned long arg)
1040 {
1041 BIG_IOCTL32_Command_struct __user *arg32 =
1042 (BIG_IOCTL32_Command_struct __user *) arg;
1043 BIG_IOCTL_Command_struct arg64;
1044 BIG_IOCTL_Command_struct __user *p =
1045 compat_alloc_user_space(sizeof(arg64));
1046 int err;
1047 u32 cp;
1048
1049 err = 0;
1050 err |=
1051 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1052 sizeof(arg64.LUN_info));
1053 err |=
1054 copy_from_user(&arg64.Request, &arg32->Request,
1055 sizeof(arg64.Request));
1056 err |=
1057 copy_from_user(&arg64.error_info, &arg32->error_info,
1058 sizeof(arg64.error_info));
1059 err |= get_user(arg64.buf_size, &arg32->buf_size);
1060 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1061 err |= get_user(cp, &arg32->buf);
1062 arg64.buf = compat_ptr(cp);
1063 err |= copy_to_user(p, &arg64, sizeof(arg64));
1064
1065 if (err)
1066 return -EFAULT;
1067
1068 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1069 if (err)
1070 return err;
1071 err |=
1072 copy_in_user(&arg32->error_info, &p->error_info,
1073 sizeof(arg32->error_info));
1074 if (err)
1075 return -EFAULT;
1076 return err;
1077 }
1078 #endif
1079
1080 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1081 {
1082 drive_info_struct *drv = get_drv(bdev->bd_disk);
1083
1084 if (!drv->cylinders)
1085 return -ENXIO;
1086
1087 geo->heads = drv->heads;
1088 geo->sectors = drv->sectors;
1089 geo->cylinders = drv->cylinders;
1090 return 0;
1091 }
1092
1093 static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1094 {
1095 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1096 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1097 (void)check_for_unit_attention(host, c);
1098 }
1099 /*
1100 * ioctl
1101 */
1102 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
1103 unsigned int cmd, unsigned long arg)
1104 {
1105 struct gendisk *disk = bdev->bd_disk;
1106 ctlr_info_t *host = get_host(disk);
1107 drive_info_struct *drv = get_drv(disk);
1108 int ctlr = host->ctlr;
1109 void __user *argp = (void __user *)arg;
1110
1111 #ifdef CCISS_DEBUG
1112 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
1113 #endif /* CCISS_DEBUG */
1114
1115 switch (cmd) {
1116 case CCISS_GETPCIINFO:
1117 {
1118 cciss_pci_info_struct pciinfo;
1119
1120 if (!arg)
1121 return -EINVAL;
1122 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1123 pciinfo.bus = host->pdev->bus->number;
1124 pciinfo.dev_fn = host->pdev->devfn;
1125 pciinfo.board_id = host->board_id;
1126 if (copy_to_user
1127 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1128 return -EFAULT;
1129 return 0;
1130 }
1131 case CCISS_GETINTINFO:
1132 {
1133 cciss_coalint_struct intinfo;
1134 if (!arg)
1135 return -EINVAL;
1136 intinfo.delay =
1137 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1138 intinfo.count =
1139 readl(&host->cfgtable->HostWrite.CoalIntCount);
1140 if (copy_to_user
1141 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1142 return -EFAULT;
1143 return 0;
1144 }
1145 case CCISS_SETINTINFO:
1146 {
1147 cciss_coalint_struct intinfo;
1148 unsigned long flags;
1149 int i;
1150
1151 if (!arg)
1152 return -EINVAL;
1153 if (!capable(CAP_SYS_ADMIN))
1154 return -EPERM;
1155 if (copy_from_user
1156 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1157 return -EFAULT;
1158 if ((intinfo.delay == 0) && (intinfo.count == 0))
1159 {
1160 // printk("cciss_ioctl: delay and count cannot be 0\n");
1161 return -EINVAL;
1162 }
1163 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1164 /* Update the field, and then ring the doorbell */
1165 writel(intinfo.delay,
1166 &(host->cfgtable->HostWrite.CoalIntDelay));
1167 writel(intinfo.count,
1168 &(host->cfgtable->HostWrite.CoalIntCount));
1169 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1170
1171 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1172 if (!(readl(host->vaddr + SA5_DOORBELL)
1173 & CFGTBL_ChangeReq))
1174 break;
1175 /* delay and try again */
1176 udelay(1000);
1177 }
1178 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1179 if (i >= MAX_IOCTL_CONFIG_WAIT)
1180 return -EAGAIN;
1181 return 0;
1182 }
1183 case CCISS_GETNODENAME:
1184 {
1185 NodeName_type NodeName;
1186 int i;
1187
1188 if (!arg)
1189 return -EINVAL;
1190 for (i = 0; i < 16; i++)
1191 NodeName[i] =
1192 readb(&host->cfgtable->ServerName[i]);
1193 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1194 return -EFAULT;
1195 return 0;
1196 }
1197 case CCISS_SETNODENAME:
1198 {
1199 NodeName_type NodeName;
1200 unsigned long flags;
1201 int i;
1202
1203 if (!arg)
1204 return -EINVAL;
1205 if (!capable(CAP_SYS_ADMIN))
1206 return -EPERM;
1207
1208 if (copy_from_user
1209 (NodeName, argp, sizeof(NodeName_type)))
1210 return -EFAULT;
1211
1212 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1213
1214 /* Update the field, and then ring the doorbell */
1215 for (i = 0; i < 16; i++)
1216 writeb(NodeName[i],
1217 &host->cfgtable->ServerName[i]);
1218
1219 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1220
1221 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1222 if (!(readl(host->vaddr + SA5_DOORBELL)
1223 & CFGTBL_ChangeReq))
1224 break;
1225 /* delay and try again */
1226 udelay(1000);
1227 }
1228 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1229 if (i >= MAX_IOCTL_CONFIG_WAIT)
1230 return -EAGAIN;
1231 return 0;
1232 }
1233
1234 case CCISS_GETHEARTBEAT:
1235 {
1236 Heartbeat_type heartbeat;
1237
1238 if (!arg)
1239 return -EINVAL;
1240 heartbeat = readl(&host->cfgtable->HeartBeat);
1241 if (copy_to_user
1242 (argp, &heartbeat, sizeof(Heartbeat_type)))
1243 return -EFAULT;
1244 return 0;
1245 }
1246 case CCISS_GETBUSTYPES:
1247 {
1248 BusTypes_type BusTypes;
1249
1250 if (!arg)
1251 return -EINVAL;
1252 BusTypes = readl(&host->cfgtable->BusTypes);
1253 if (copy_to_user
1254 (argp, &BusTypes, sizeof(BusTypes_type)))
1255 return -EFAULT;
1256 return 0;
1257 }
1258 case CCISS_GETFIRMVER:
1259 {
1260 FirmwareVer_type firmware;
1261
1262 if (!arg)
1263 return -EINVAL;
1264 memcpy(firmware, host->firm_ver, 4);
1265
1266 if (copy_to_user
1267 (argp, firmware, sizeof(FirmwareVer_type)))
1268 return -EFAULT;
1269 return 0;
1270 }
1271 case CCISS_GETDRIVVER:
1272 {
1273 DriverVer_type DriverVer = DRIVER_VERSION;
1274
1275 if (!arg)
1276 return -EINVAL;
1277
1278 if (copy_to_user
1279 (argp, &DriverVer, sizeof(DriverVer_type)))
1280 return -EFAULT;
1281 return 0;
1282 }
1283
1284 case CCISS_DEREGDISK:
1285 case CCISS_REGNEWD:
1286 case CCISS_REVALIDVOLS:
1287 return rebuild_lun_table(host, 0, 1);
1288
1289 case CCISS_GETLUNINFO:{
1290 LogvolInfo_struct luninfo;
1291
1292 memcpy(&luninfo.LunID, drv->LunID,
1293 sizeof(luninfo.LunID));
1294 luninfo.num_opens = drv->usage_count;
1295 luninfo.num_parts = 0;
1296 if (copy_to_user(argp, &luninfo,
1297 sizeof(LogvolInfo_struct)))
1298 return -EFAULT;
1299 return 0;
1300 }
1301 case CCISS_PASSTHRU:
1302 {
1303 IOCTL_Command_struct iocommand;
1304 CommandList_struct *c;
1305 char *buff = NULL;
1306 u64bit temp64;
1307 unsigned long flags;
1308 DECLARE_COMPLETION_ONSTACK(wait);
1309
1310 if (!arg)
1311 return -EINVAL;
1312
1313 if (!capable(CAP_SYS_RAWIO))
1314 return -EPERM;
1315
1316 if (copy_from_user
1317 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1318 return -EFAULT;
1319 if ((iocommand.buf_size < 1) &&
1320 (iocommand.Request.Type.Direction != XFER_NONE)) {
1321 return -EINVAL;
1322 }
1323 #if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1324 /* Check kmalloc limits */
1325 if (iocommand.buf_size > 128000)
1326 return -EINVAL;
1327 #endif
1328 if (iocommand.buf_size > 0) {
1329 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1330 if (buff == NULL)
1331 return -EFAULT;
1332 }
1333 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1334 /* Copy the data into the buffer we created */
1335 if (copy_from_user
1336 (buff, iocommand.buf, iocommand.buf_size)) {
1337 kfree(buff);
1338 return -EFAULT;
1339 }
1340 } else {
1341 memset(buff, 0, iocommand.buf_size);
1342 }
1343 if ((c = cmd_alloc(host, 0)) == NULL) {
1344 kfree(buff);
1345 return -ENOMEM;
1346 }
1347 // Fill in the command type
1348 c->cmd_type = CMD_IOCTL_PEND;
1349 // Fill in Command Header
1350 c->Header.ReplyQueue = 0; // unused in simple mode
1351 if (iocommand.buf_size > 0) // buffer to fill
1352 {
1353 c->Header.SGList = 1;
1354 c->Header.SGTotal = 1;
1355 } else // no buffers to fill
1356 {
1357 c->Header.SGList = 0;
1358 c->Header.SGTotal = 0;
1359 }
1360 c->Header.LUN = iocommand.LUN_info;
1361 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1362
1363 // Fill in Request block
1364 c->Request = iocommand.Request;
1365
1366 // Fill in the scatter gather information
1367 if (iocommand.buf_size > 0) {
1368 temp64.val = pci_map_single(host->pdev, buff,
1369 iocommand.buf_size,
1370 PCI_DMA_BIDIRECTIONAL);
1371 c->SG[0].Addr.lower = temp64.val32.lower;
1372 c->SG[0].Addr.upper = temp64.val32.upper;
1373 c->SG[0].Len = iocommand.buf_size;
1374 c->SG[0].Ext = 0; // we are not chaining
1375 }
1376 c->waiting = &wait;
1377
1378 /* Put the request on the tail of the request queue */
1379 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1380 addQ(&host->reqQ, c);
1381 host->Qdepth++;
1382 start_io(host);
1383 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1384
1385 wait_for_completion(&wait);
1386
1387 /* unlock the buffers from DMA */
1388 temp64.val32.lower = c->SG[0].Addr.lower;
1389 temp64.val32.upper = c->SG[0].Addr.upper;
1390 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1391 iocommand.buf_size,
1392 PCI_DMA_BIDIRECTIONAL);
1393
1394 check_ioctl_unit_attention(host, c);
1395
1396 /* Copy the error information out */
1397 iocommand.error_info = *(c->err_info);
1398 if (copy_to_user
1399 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1400 kfree(buff);
1401 cmd_free(host, c, 0);
1402 return -EFAULT;
1403 }
1404
1405 if (iocommand.Request.Type.Direction == XFER_READ) {
1406 /* Copy the data out of the buffer we created */
1407 if (copy_to_user
1408 (iocommand.buf, buff, iocommand.buf_size)) {
1409 kfree(buff);
1410 cmd_free(host, c, 0);
1411 return -EFAULT;
1412 }
1413 }
1414 kfree(buff);
1415 cmd_free(host, c, 0);
1416 return 0;
1417 }
1418 case CCISS_BIG_PASSTHRU:{
1419 BIG_IOCTL_Command_struct *ioc;
1420 CommandList_struct *c;
1421 unsigned char **buff = NULL;
1422 int *buff_size = NULL;
1423 u64bit temp64;
1424 unsigned long flags;
1425 BYTE sg_used = 0;
1426 int status = 0;
1427 int i;
1428 DECLARE_COMPLETION_ONSTACK(wait);
1429 __u32 left;
1430 __u32 sz;
1431 BYTE __user *data_ptr;
1432
1433 if (!arg)
1434 return -EINVAL;
1435 if (!capable(CAP_SYS_RAWIO))
1436 return -EPERM;
1437 ioc = (BIG_IOCTL_Command_struct *)
1438 kmalloc(sizeof(*ioc), GFP_KERNEL);
1439 if (!ioc) {
1440 status = -ENOMEM;
1441 goto cleanup1;
1442 }
1443 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1444 status = -EFAULT;
1445 goto cleanup1;
1446 }
1447 if ((ioc->buf_size < 1) &&
1448 (ioc->Request.Type.Direction != XFER_NONE)) {
1449 status = -EINVAL;
1450 goto cleanup1;
1451 }
1452 /* Check kmalloc limits using all SGs */
1453 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1454 status = -EINVAL;
1455 goto cleanup1;
1456 }
1457 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1458 status = -EINVAL;
1459 goto cleanup1;
1460 }
1461 buff =
1462 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1463 if (!buff) {
1464 status = -ENOMEM;
1465 goto cleanup1;
1466 }
1467 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
1468 GFP_KERNEL);
1469 if (!buff_size) {
1470 status = -ENOMEM;
1471 goto cleanup1;
1472 }
1473 left = ioc->buf_size;
1474 data_ptr = ioc->buf;
1475 while (left) {
1476 sz = (left >
1477 ioc->malloc_size) ? ioc->
1478 malloc_size : left;
1479 buff_size[sg_used] = sz;
1480 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1481 if (buff[sg_used] == NULL) {
1482 status = -ENOMEM;
1483 goto cleanup1;
1484 }
1485 if (ioc->Request.Type.Direction == XFER_WRITE) {
1486 if (copy_from_user
1487 (buff[sg_used], data_ptr, sz)) {
1488 status = -EFAULT;
1489 goto cleanup1;
1490 }
1491 } else {
1492 memset(buff[sg_used], 0, sz);
1493 }
1494 left -= sz;
1495 data_ptr += sz;
1496 sg_used++;
1497 }
1498 if ((c = cmd_alloc(host, 0)) == NULL) {
1499 status = -ENOMEM;
1500 goto cleanup1;
1501 }
1502 c->cmd_type = CMD_IOCTL_PEND;
1503 c->Header.ReplyQueue = 0;
1504
1505 if (ioc->buf_size > 0) {
1506 c->Header.SGList = sg_used;
1507 c->Header.SGTotal = sg_used;
1508 } else {
1509 c->Header.SGList = 0;
1510 c->Header.SGTotal = 0;
1511 }
1512 c->Header.LUN = ioc->LUN_info;
1513 c->Header.Tag.lower = c->busaddr;
1514
1515 c->Request = ioc->Request;
1516 if (ioc->buf_size > 0) {
1517 int i;
1518 for (i = 0; i < sg_used; i++) {
1519 temp64.val =
1520 pci_map_single(host->pdev, buff[i],
1521 buff_size[i],
1522 PCI_DMA_BIDIRECTIONAL);
1523 c->SG[i].Addr.lower =
1524 temp64.val32.lower;
1525 c->SG[i].Addr.upper =
1526 temp64.val32.upper;
1527 c->SG[i].Len = buff_size[i];
1528 c->SG[i].Ext = 0; /* we are not chaining */
1529 }
1530 }
1531 c->waiting = &wait;
1532 /* Put the request on the tail of the request queue */
1533 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1534 addQ(&host->reqQ, c);
1535 host->Qdepth++;
1536 start_io(host);
1537 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1538 wait_for_completion(&wait);
1539 /* unlock the buffers from DMA */
1540 for (i = 0; i < sg_used; i++) {
1541 temp64.val32.lower = c->SG[i].Addr.lower;
1542 temp64.val32.upper = c->SG[i].Addr.upper;
1543 pci_unmap_single(host->pdev,
1544 (dma_addr_t) temp64.val, buff_size[i],
1545 PCI_DMA_BIDIRECTIONAL);
1546 }
1547 check_ioctl_unit_attention(host, c);
1548 /* Copy the error information out */
1549 ioc->error_info = *(c->err_info);
1550 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1551 cmd_free(host, c, 0);
1552 status = -EFAULT;
1553 goto cleanup1;
1554 }
1555 if (ioc->Request.Type.Direction == XFER_READ) {
1556 /* Copy the data out of the buffer we created */
1557 BYTE __user *ptr = ioc->buf;
1558 for (i = 0; i < sg_used; i++) {
1559 if (copy_to_user
1560 (ptr, buff[i], buff_size[i])) {
1561 cmd_free(host, c, 0);
1562 status = -EFAULT;
1563 goto cleanup1;
1564 }
1565 ptr += buff_size[i];
1566 }
1567 }
1568 cmd_free(host, c, 0);
1569 status = 0;
1570 cleanup1:
1571 if (buff) {
1572 for (i = 0; i < sg_used; i++)
1573 kfree(buff[i]);
1574 kfree(buff);
1575 }
1576 kfree(buff_size);
1577 kfree(ioc);
1578 return status;
1579 }
1580
1581 /* scsi_cmd_ioctl handles these, below, though some are not */
1582 /* very meaningful for cciss. SG_IO is the main one people want. */
1583
1584 case SG_GET_VERSION_NUM:
1585 case SG_SET_TIMEOUT:
1586 case SG_GET_TIMEOUT:
1587 case SG_GET_RESERVED_SIZE:
1588 case SG_SET_RESERVED_SIZE:
1589 case SG_EMULATED_HOST:
1590 case SG_IO:
1591 case SCSI_IOCTL_SEND_COMMAND:
1592 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
1593
1594 /* scsi_cmd_ioctl would normally handle these, below, but */
1595 /* they aren't a good fit for cciss, as CD-ROMs are */
1596 /* not supported, and we don't have any bus/target/lun */
1597 /* which we present to the kernel. */
1598
1599 case CDROM_SEND_PACKET:
1600 case CDROMCLOSETRAY:
1601 case CDROMEJECT:
1602 case SCSI_IOCTL_GET_IDLUN:
1603 case SCSI_IOCTL_GET_BUS_NUMBER:
1604 default:
1605 return -ENOTTY;
1606 }
1607 }
1608
1609 static void cciss_check_queues(ctlr_info_t *h)
1610 {
1611 int start_queue = h->next_to_run;
1612 int i;
1613
1614 /* check to see if we have maxed out the number of commands that can
1615 * be placed on the queue. If so then exit. We do this check here
1616 * in case the interrupt we serviced was from an ioctl and did not
1617 * free any new commands.
1618 */
1619 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
1620 return;
1621
1622 /* We have room on the queue for more commands. Now we need to queue
1623 * them up. We will also keep track of the next queue to run so
1624 * that every queue gets a chance to be started first.
1625 */
1626 for (i = 0; i < h->highest_lun + 1; i++) {
1627 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1628 /* make sure the disk has been added and the drive is real
1629 * because this can be called from the middle of init_one.
1630 */
1631 if (!h->drv[curr_queue])
1632 continue;
1633 if (!(h->drv[curr_queue]->queue) ||
1634 !(h->drv[curr_queue]->heads))
1635 continue;
1636 blk_start_queue(h->gendisk[curr_queue]->queue);
1637
1638 /* check to see if we have maxed out the number of commands
1639 * that can be placed on the queue.
1640 */
1641 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
1642 if (curr_queue == start_queue) {
1643 h->next_to_run =
1644 (start_queue + 1) % (h->highest_lun + 1);
1645 break;
1646 } else {
1647 h->next_to_run = curr_queue;
1648 break;
1649 }
1650 }
1651 }
1652 }
1653
1654 static void cciss_softirq_done(struct request *rq)
1655 {
1656 CommandList_struct *cmd = rq->completion_data;
1657 ctlr_info_t *h = hba[cmd->ctlr];
1658 SGDescriptor_struct *curr_sg = cmd->SG;
1659 unsigned long flags;
1660 u64bit temp64;
1661 int i, ddir;
1662 int sg_index = 0;
1663
1664 if (cmd->Request.Type.Direction == XFER_READ)
1665 ddir = PCI_DMA_FROMDEVICE;
1666 else
1667 ddir = PCI_DMA_TODEVICE;
1668
1669 /* command did not need to be retried */
1670 /* unmap the DMA mapping for all the scatter gather elements */
1671 for (i = 0; i < cmd->Header.SGList; i++) {
1672 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
1673 temp64.val32.lower = cmd->SG[i].Addr.lower;
1674 temp64.val32.upper = cmd->SG[i].Addr.upper;
1675 pci_dma_sync_single_for_cpu(h->pdev, temp64.val,
1676 cmd->SG[i].Len, ddir);
1677 pci_unmap_single(h->pdev, temp64.val,
1678 cmd->SG[i].Len, ddir);
1679 /* Point to the next block */
1680 curr_sg = h->cmd_sg_list[cmd->cmdindex]->sgchain;
1681 sg_index = 0;
1682 }
1683 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1684 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1685 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1686 ddir);
1687 ++sg_index;
1688 }
1689
1690 #ifdef CCISS_DEBUG
1691 printk("Done with %p\n", rq);
1692 #endif /* CCISS_DEBUG */
1693
1694 /* set the residual count for pc requests */
1695 if (blk_pc_request(rq))
1696 rq->resid_len = cmd->err_info->ResidualCnt;
1697
1698 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
1699
1700 spin_lock_irqsave(&h->lock, flags);
1701 cmd_free(h, cmd, 1);
1702 cciss_check_queues(h);
1703 spin_unlock_irqrestore(&h->lock, flags);
1704 }
1705
1706 static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1707 unsigned char scsi3addr[], uint32_t log_unit)
1708 {
1709 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1710 sizeof(h->drv[log_unit]->LunID));
1711 }
1712
1713 /* This function gets the SCSI vendor, model, and revision of a logical drive
1714 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1715 * they cannot be read.
1716 */
1717 static void cciss_get_device_descr(int ctlr, int logvol,
1718 char *vendor, char *model, char *rev)
1719 {
1720 int rc;
1721 InquiryData_struct *inq_buf;
1722 unsigned char scsi3addr[8];
1723
1724 *vendor = '\0';
1725 *model = '\0';
1726 *rev = '\0';
1727
1728 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1729 if (!inq_buf)
1730 return;
1731
1732 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1733 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
1734 scsi3addr, TYPE_CMD);
1735 if (rc == IO_OK) {
1736 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1737 vendor[VENDOR_LEN] = '\0';
1738 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1739 model[MODEL_LEN] = '\0';
1740 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1741 rev[REV_LEN] = '\0';
1742 }
1743
1744 kfree(inq_buf);
1745 return;
1746 }
1747
1748 /* This function gets the serial number of a logical drive via
1749 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1750 * number cannot be had, for whatever reason, 16 bytes of 0xff
1751 * are returned instead.
1752 */
1753 static void cciss_get_serial_no(int ctlr, int logvol,
1754 unsigned char *serial_no, int buflen)
1755 {
1756 #define PAGE_83_INQ_BYTES 64
1757 int rc;
1758 unsigned char *buf;
1759 unsigned char scsi3addr[8];
1760
1761 if (buflen > 16)
1762 buflen = 16;
1763 memset(serial_no, 0xff, buflen);
1764 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1765 if (!buf)
1766 return;
1767 memset(serial_no, 0, buflen);
1768 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1769 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
1770 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
1771 if (rc == IO_OK)
1772 memcpy(serial_no, &buf[8], buflen);
1773 kfree(buf);
1774 return;
1775 }
1776
1777 /*
1778 * cciss_add_disk sets up the block device queue for a logical drive
1779 */
1780 static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
1781 int drv_index)
1782 {
1783 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
1784 if (!disk->queue)
1785 goto init_queue_failure;
1786 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1787 disk->major = h->major;
1788 disk->first_minor = drv_index << NWD_SHIFT;
1789 disk->fops = &cciss_fops;
1790 if (cciss_create_ld_sysfs_entry(h, drv_index))
1791 goto cleanup_queue;
1792 disk->private_data = h->drv[drv_index];
1793 disk->driverfs_dev = &h->drv[drv_index]->dev;
1794
1795 /* Set up queue information */
1796 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1797
1798 /* This is a hardware imposed limit. */
1799 blk_queue_max_hw_segments(disk->queue, h->maxsgentries);
1800
1801 /* This is a limit in the driver and could be eliminated. */
1802 blk_queue_max_phys_segments(disk->queue, h->maxsgentries);
1803
1804 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1805
1806 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1807
1808 disk->queue->queuedata = h;
1809
1810 blk_queue_logical_block_size(disk->queue,
1811 h->drv[drv_index]->block_size);
1812
1813 /* Make sure all queue data is written out before */
1814 /* setting h->drv[drv_index]->queue, as setting this */
1815 /* allows the interrupt handler to start the queue */
1816 wmb();
1817 h->drv[drv_index]->queue = disk->queue;
1818 add_disk(disk);
1819 return 0;
1820
1821 cleanup_queue:
1822 blk_cleanup_queue(disk->queue);
1823 disk->queue = NULL;
1824 init_queue_failure:
1825 return -1;
1826 }
1827
1828 /* This function will check the usage_count of the drive to be updated/added.
1829 * If the usage_count is zero and it is a heretofore unknown drive, or,
1830 * the drive's capacity, geometry, or serial number has changed,
1831 * then the drive information will be updated and the disk will be
1832 * re-registered with the kernel. If these conditions don't hold,
1833 * then it will be left alone for the next reboot. The exception to this
1834 * is disk 0 which will always be left registered with the kernel since it
1835 * is also the controller node. Any changes to disk 0 will show up on
1836 * the next reboot.
1837 */
1838 static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1839 int via_ioctl)
1840 {
1841 ctlr_info_t *h = hba[ctlr];
1842 struct gendisk *disk;
1843 InquiryData_struct *inq_buff = NULL;
1844 unsigned int block_size;
1845 sector_t total_size;
1846 unsigned long flags = 0;
1847 int ret = 0;
1848 drive_info_struct *drvinfo;
1849
1850 /* Get information about the disk and modify the driver structure */
1851 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1852 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
1853 if (inq_buff == NULL || drvinfo == NULL)
1854 goto mem_msg;
1855
1856 /* testing to see if 16-byte CDBs are already being used */
1857 if (h->cciss_read == CCISS_READ_16) {
1858 cciss_read_capacity_16(h->ctlr, drv_index,
1859 &total_size, &block_size);
1860
1861 } else {
1862 cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
1863 /* if read_capacity returns all F's this volume is >2TB */
1864 /* in size so we switch to 16-byte CDB's for all */
1865 /* read/write ops */
1866 if (total_size == 0xFFFFFFFFULL) {
1867 cciss_read_capacity_16(ctlr, drv_index,
1868 &total_size, &block_size);
1869 h->cciss_read = CCISS_READ_16;
1870 h->cciss_write = CCISS_WRITE_16;
1871 } else {
1872 h->cciss_read = CCISS_READ_10;
1873 h->cciss_write = CCISS_WRITE_10;
1874 }
1875 }
1876
1877 cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
1878 inq_buff, drvinfo);
1879 drvinfo->block_size = block_size;
1880 drvinfo->nr_blocks = total_size + 1;
1881
1882 cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
1883 drvinfo->model, drvinfo->rev);
1884 cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
1885 sizeof(drvinfo->serial_no));
1886 /* Save the lunid in case we deregister the disk, below. */
1887 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
1888 sizeof(drvinfo->LunID));
1889
1890 /* Is it the same disk we already know, and nothing's changed? */
1891 if (h->drv[drv_index]->raid_level != -1 &&
1892 ((memcmp(drvinfo->serial_no,
1893 h->drv[drv_index]->serial_no, 16) == 0) &&
1894 drvinfo->block_size == h->drv[drv_index]->block_size &&
1895 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
1896 drvinfo->heads == h->drv[drv_index]->heads &&
1897 drvinfo->sectors == h->drv[drv_index]->sectors &&
1898 drvinfo->cylinders == h->drv[drv_index]->cylinders))
1899 /* The disk is unchanged, nothing to update */
1900 goto freeret;
1901
1902 /* If we get here it's not the same disk, or something's changed,
1903 * so we need to * deregister it, and re-register it, if it's not
1904 * in use.
1905 * If the disk already exists then deregister it before proceeding
1906 * (unless it's the first disk (for the controller node).
1907 */
1908 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
1909 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
1910 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1911 h->drv[drv_index]->busy_configuring = 1;
1912 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
1913
1914 /* deregister_disk sets h->drv[drv_index]->queue = NULL
1915 * which keeps the interrupt handler from starting
1916 * the queue.
1917 */
1918 ret = deregister_disk(h, drv_index, 0, via_ioctl);
1919 }
1920
1921 /* If the disk is in use return */
1922 if (ret)
1923 goto freeret;
1924
1925 /* Save the new information from cciss_geometry_inquiry
1926 * and serial number inquiry. If the disk was deregistered
1927 * above, then h->drv[drv_index] will be NULL.
1928 */
1929 if (h->drv[drv_index] == NULL) {
1930 drvinfo->device_initialized = 0;
1931 h->drv[drv_index] = drvinfo;
1932 drvinfo = NULL; /* so it won't be freed below. */
1933 } else {
1934 /* special case for cxd0 */
1935 h->drv[drv_index]->block_size = drvinfo->block_size;
1936 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
1937 h->drv[drv_index]->heads = drvinfo->heads;
1938 h->drv[drv_index]->sectors = drvinfo->sectors;
1939 h->drv[drv_index]->cylinders = drvinfo->cylinders;
1940 h->drv[drv_index]->raid_level = drvinfo->raid_level;
1941 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
1942 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
1943 VENDOR_LEN + 1);
1944 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
1945 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
1946 }
1947
1948 ++h->num_luns;
1949 disk = h->gendisk[drv_index];
1950 set_capacity(disk, h->drv[drv_index]->nr_blocks);
1951
1952 /* If it's not disk 0 (drv_index != 0)
1953 * or if it was disk 0, but there was previously
1954 * no actual corresponding configured logical drive
1955 * (raid_leve == -1) then we want to update the
1956 * logical drive's information.
1957 */
1958 if (drv_index || first_time) {
1959 if (cciss_add_disk(h, disk, drv_index) != 0) {
1960 cciss_free_gendisk(h, drv_index);
1961 cciss_free_drive_info(h, drv_index);
1962 printk(KERN_WARNING "cciss:%d could not update "
1963 "disk %d\n", h->ctlr, drv_index);
1964 --h->num_luns;
1965 }
1966 }
1967
1968 freeret:
1969 kfree(inq_buff);
1970 kfree(drvinfo);
1971 return;
1972 mem_msg:
1973 printk(KERN_ERR "cciss: out of memory\n");
1974 goto freeret;
1975 }
1976
1977 /* This function will find the first index of the controllers drive array
1978 * that has a null drv pointer and allocate the drive info struct and
1979 * will return that index This is where new drives will be added.
1980 * If the index to be returned is greater than the highest_lun index for
1981 * the controller then highest_lun is set * to this new index.
1982 * If there are no available indexes or if tha allocation fails, then -1
1983 * is returned. * "controller_node" is used to know if this is a real
1984 * logical drive, or just the controller node, which determines if this
1985 * counts towards highest_lun.
1986 */
1987 static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
1988 {
1989 int i;
1990 drive_info_struct *drv;
1991
1992 /* Search for an empty slot for our drive info */
1993 for (i = 0; i < CISS_MAX_LUN; i++) {
1994
1995 /* if not cxd0 case, and it's occupied, skip it. */
1996 if (h->drv[i] && i != 0)
1997 continue;
1998 /*
1999 * If it's cxd0 case, and drv is alloc'ed already, and a
2000 * disk is configured there, skip it.
2001 */
2002 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2003 continue;
2004
2005 /*
2006 * We've found an empty slot. Update highest_lun
2007 * provided this isn't just the fake cxd0 controller node.
2008 */
2009 if (i > h->highest_lun && !controller_node)
2010 h->highest_lun = i;
2011
2012 /* If adding a real disk at cxd0, and it's already alloc'ed */
2013 if (i == 0 && h->drv[i] != NULL)
2014 return i;
2015
2016 /*
2017 * Found an empty slot, not already alloc'ed. Allocate it.
2018 * Mark it with raid_level == -1, so we know it's new later on.
2019 */
2020 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2021 if (!drv)
2022 return -1;
2023 drv->raid_level = -1; /* so we know it's new */
2024 h->drv[i] = drv;
2025 return i;
2026 }
2027 return -1;
2028 }
2029
2030 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2031 {
2032 kfree(h->drv[drv_index]);
2033 h->drv[drv_index] = NULL;
2034 }
2035
2036 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2037 {
2038 put_disk(h->gendisk[drv_index]);
2039 h->gendisk[drv_index] = NULL;
2040 }
2041
2042 /* cciss_add_gendisk finds a free hba[]->drv structure
2043 * and allocates a gendisk if needed, and sets the lunid
2044 * in the drvinfo structure. It returns the index into
2045 * the ->drv[] array, or -1 if none are free.
2046 * is_controller_node indicates whether highest_lun should
2047 * count this disk, or if it's only being added to provide
2048 * a means to talk to the controller in case no logical
2049 * drives have yet been configured.
2050 */
2051 static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2052 int controller_node)
2053 {
2054 int drv_index;
2055
2056 drv_index = cciss_alloc_drive_info(h, controller_node);
2057 if (drv_index == -1)
2058 return -1;
2059
2060 /*Check if the gendisk needs to be allocated */
2061 if (!h->gendisk[drv_index]) {
2062 h->gendisk[drv_index] =
2063 alloc_disk(1 << NWD_SHIFT);
2064 if (!h->gendisk[drv_index]) {
2065 printk(KERN_ERR "cciss%d: could not "
2066 "allocate a new disk %d\n",
2067 h->ctlr, drv_index);
2068 goto err_free_drive_info;
2069 }
2070 }
2071 memcpy(h->drv[drv_index]->LunID, lunid,
2072 sizeof(h->drv[drv_index]->LunID));
2073 if (cciss_create_ld_sysfs_entry(h, drv_index))
2074 goto err_free_disk;
2075 /* Don't need to mark this busy because nobody */
2076 /* else knows about this disk yet to contend */
2077 /* for access to it. */
2078 h->drv[drv_index]->busy_configuring = 0;
2079 wmb();
2080 return drv_index;
2081
2082 err_free_disk:
2083 cciss_free_gendisk(h, drv_index);
2084 err_free_drive_info:
2085 cciss_free_drive_info(h, drv_index);
2086 return -1;
2087 }
2088
2089 /* This is for the special case of a controller which
2090 * has no logical drives. In this case, we still need
2091 * to register a disk so the controller can be accessed
2092 * by the Array Config Utility.
2093 */
2094 static void cciss_add_controller_node(ctlr_info_t *h)
2095 {
2096 struct gendisk *disk;
2097 int drv_index;
2098
2099 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2100 return;
2101
2102 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
2103 if (drv_index == -1)
2104 goto error;
2105 h->drv[drv_index]->block_size = 512;
2106 h->drv[drv_index]->nr_blocks = 0;
2107 h->drv[drv_index]->heads = 0;
2108 h->drv[drv_index]->sectors = 0;
2109 h->drv[drv_index]->cylinders = 0;
2110 h->drv[drv_index]->raid_level = -1;
2111 memset(h->drv[drv_index]->serial_no, 0, 16);
2112 disk = h->gendisk[drv_index];
2113 if (cciss_add_disk(h, disk, drv_index) == 0)
2114 return;
2115 cciss_free_gendisk(h, drv_index);
2116 cciss_free_drive_info(h, drv_index);
2117 error:
2118 printk(KERN_WARNING "cciss%d: could not "
2119 "add disk 0.\n", h->ctlr);
2120 return;
2121 }
2122
2123 /* This function will add and remove logical drives from the Logical
2124 * drive array of the controller and maintain persistency of ordering
2125 * so that mount points are preserved until the next reboot. This allows
2126 * for the removal of logical drives in the middle of the drive array
2127 * without a re-ordering of those drives.
2128 * INPUT
2129 * h = The controller to perform the operations on
2130 */
2131 static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2132 int via_ioctl)
2133 {
2134 int ctlr = h->ctlr;
2135 int num_luns;
2136 ReportLunData_struct *ld_buff = NULL;
2137 int return_code;
2138 int listlength = 0;
2139 int i;
2140 int drv_found;
2141 int drv_index = 0;
2142 unsigned char lunid[8] = CTLR_LUNID;
2143 unsigned long flags;
2144
2145 if (!capable(CAP_SYS_RAWIO))
2146 return -EPERM;
2147
2148 /* Set busy_configuring flag for this operation */
2149 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2150 if (h->busy_configuring) {
2151 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2152 return -EBUSY;
2153 }
2154 h->busy_configuring = 1;
2155 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2156
2157 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2158 if (ld_buff == NULL)
2159 goto mem_msg;
2160
2161 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
2162 sizeof(ReportLunData_struct),
2163 0, CTLR_LUNID, TYPE_CMD);
2164
2165 if (return_code == IO_OK)
2166 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2167 else { /* reading number of logical volumes failed */
2168 printk(KERN_WARNING "cciss: report logical volume"
2169 " command failed\n");
2170 listlength = 0;
2171 goto freeret;
2172 }
2173
2174 num_luns = listlength / 8; /* 8 bytes per entry */
2175 if (num_luns > CISS_MAX_LUN) {
2176 num_luns = CISS_MAX_LUN;
2177 printk(KERN_WARNING "cciss: more luns configured"
2178 " on controller than can be handled by"
2179 " this driver.\n");
2180 }
2181
2182 if (num_luns == 0)
2183 cciss_add_controller_node(h);
2184
2185 /* Compare controller drive array to driver's drive array
2186 * to see if any drives are missing on the controller due
2187 * to action of Array Config Utility (user deletes drive)
2188 * and deregister logical drives which have disappeared.
2189 */
2190 for (i = 0; i <= h->highest_lun; i++) {
2191 int j;
2192 drv_found = 0;
2193
2194 /* skip holes in the array from already deleted drives */
2195 if (h->drv[i] == NULL)
2196 continue;
2197
2198 for (j = 0; j < num_luns; j++) {
2199 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
2200 if (memcmp(h->drv[i]->LunID, lunid,
2201 sizeof(lunid)) == 0) {
2202 drv_found = 1;
2203 break;
2204 }
2205 }
2206 if (!drv_found) {
2207 /* Deregister it from the OS, it's gone. */
2208 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2209 h->drv[i]->busy_configuring = 1;
2210 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2211 return_code = deregister_disk(h, i, 1, via_ioctl);
2212 if (h->drv[i] != NULL)
2213 h->drv[i]->busy_configuring = 0;
2214 }
2215 }
2216
2217 /* Compare controller drive array to driver's drive array.
2218 * Check for updates in the drive information and any new drives
2219 * on the controller due to ACU adding logical drives, or changing
2220 * a logical drive's size, etc. Reregister any new/changed drives
2221 */
2222 for (i = 0; i < num_luns; i++) {
2223 int j;
2224
2225 drv_found = 0;
2226
2227 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
2228 /* Find if the LUN is already in the drive array
2229 * of the driver. If so then update its info
2230 * if not in use. If it does not exist then find
2231 * the first free index and add it.
2232 */
2233 for (j = 0; j <= h->highest_lun; j++) {
2234 if (h->drv[j] != NULL &&
2235 memcmp(h->drv[j]->LunID, lunid,
2236 sizeof(h->drv[j]->LunID)) == 0) {
2237 drv_index = j;
2238 drv_found = 1;
2239 break;
2240 }
2241 }
2242
2243 /* check if the drive was found already in the array */
2244 if (!drv_found) {
2245 drv_index = cciss_add_gendisk(h, lunid, 0);
2246 if (drv_index == -1)
2247 goto freeret;
2248 }
2249 cciss_update_drive_info(ctlr, drv_index, first_time,
2250 via_ioctl);
2251 } /* end for */
2252
2253 freeret:
2254 kfree(ld_buff);
2255 h->busy_configuring = 0;
2256 /* We return -1 here to tell the ACU that we have registered/updated
2257 * all of the drives that we can and to keep it from calling us
2258 * additional times.
2259 */
2260 return -1;
2261 mem_msg:
2262 printk(KERN_ERR "cciss: out of memory\n");
2263 h->busy_configuring = 0;
2264 goto freeret;
2265 }
2266
2267 static void cciss_clear_drive_info(drive_info_struct *drive_info)
2268 {
2269 /* zero out the disk size info */
2270 drive_info->nr_blocks = 0;
2271 drive_info->block_size = 0;
2272 drive_info->heads = 0;
2273 drive_info->sectors = 0;
2274 drive_info->cylinders = 0;
2275 drive_info->raid_level = -1;
2276 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2277 memset(drive_info->model, 0, sizeof(drive_info->model));
2278 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2279 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2280 /*
2281 * don't clear the LUNID though, we need to remember which
2282 * one this one is.
2283 */
2284 }
2285
2286 /* This function will deregister the disk and it's queue from the
2287 * kernel. It must be called with the controller lock held and the
2288 * drv structures busy_configuring flag set. It's parameters are:
2289 *
2290 * disk = This is the disk to be deregistered
2291 * drv = This is the drive_info_struct associated with the disk to be
2292 * deregistered. It contains information about the disk used
2293 * by the driver.
2294 * clear_all = This flag determines whether or not the disk information
2295 * is going to be completely cleared out and the highest_lun
2296 * reset. Sometimes we want to clear out information about
2297 * the disk in preparation for re-adding it. In this case
2298 * the highest_lun should be left unchanged and the LunID
2299 * should not be cleared.
2300 * via_ioctl
2301 * This indicates whether we've reached this path via ioctl.
2302 * This affects the maximum usage count allowed for c0d0 to be messed with.
2303 * If this path is reached via ioctl(), then the max_usage_count will
2304 * be 1, as the process calling ioctl() has got to have the device open.
2305 * If we get here via sysfs, then the max usage count will be zero.
2306 */
2307 static int deregister_disk(ctlr_info_t *h, int drv_index,
2308 int clear_all, int via_ioctl)
2309 {
2310 int i;
2311 struct gendisk *disk;
2312 drive_info_struct *drv;
2313 int recalculate_highest_lun;
2314
2315 if (!capable(CAP_SYS_RAWIO))
2316 return -EPERM;
2317
2318 drv = h->drv[drv_index];
2319 disk = h->gendisk[drv_index];
2320
2321 /* make sure logical volume is NOT is use */
2322 if (clear_all || (h->gendisk[0] == disk)) {
2323 if (drv->usage_count > via_ioctl)
2324 return -EBUSY;
2325 } else if (drv->usage_count > 0)
2326 return -EBUSY;
2327
2328 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2329
2330 /* invalidate the devices and deregister the disk. If it is disk
2331 * zero do not deregister it but just zero out it's values. This
2332 * allows us to delete disk zero but keep the controller registered.
2333 */
2334 if (h->gendisk[0] != disk) {
2335 struct request_queue *q = disk->queue;
2336 if (disk->flags & GENHD_FL_UP) {
2337 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
2338 del_gendisk(disk);
2339 }
2340 if (q)
2341 blk_cleanup_queue(q);
2342 /* If clear_all is set then we are deleting the logical
2343 * drive, not just refreshing its info. For drives
2344 * other than disk 0 we will call put_disk. We do not
2345 * do this for disk 0 as we need it to be able to
2346 * configure the controller.
2347 */
2348 if (clear_all){
2349 /* This isn't pretty, but we need to find the
2350 * disk in our array and NULL our the pointer.
2351 * This is so that we will call alloc_disk if
2352 * this index is used again later.
2353 */
2354 for (i=0; i < CISS_MAX_LUN; i++){
2355 if (h->gendisk[i] == disk) {
2356 h->gendisk[i] = NULL;
2357 break;
2358 }
2359 }
2360 put_disk(disk);
2361 }
2362 } else {
2363 set_capacity(disk, 0);
2364 cciss_clear_drive_info(drv);
2365 }
2366
2367 --h->num_luns;
2368
2369 /* if it was the last disk, find the new hightest lun */
2370 if (clear_all && recalculate_highest_lun) {
2371 int i, newhighest = -1;
2372 for (i = 0; i <= h->highest_lun; i++) {
2373 /* if the disk has size > 0, it is available */
2374 if (h->drv[i] && h->drv[i]->heads)
2375 newhighest = i;
2376 }
2377 h->highest_lun = newhighest;
2378 }
2379 return 0;
2380 }
2381
2382 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2383 size_t size, __u8 page_code, unsigned char *scsi3addr,
2384 int cmd_type)
2385 {
2386 ctlr_info_t *h = hba[ctlr];
2387 u64bit buff_dma_handle;
2388 int status = IO_OK;
2389
2390 c->cmd_type = CMD_IOCTL_PEND;
2391 c->Header.ReplyQueue = 0;
2392 if (buff != NULL) {
2393 c->Header.SGList = 1;
2394 c->Header.SGTotal = 1;
2395 } else {
2396 c->Header.SGList = 0;
2397 c->Header.SGTotal = 0;
2398 }
2399 c->Header.Tag.lower = c->busaddr;
2400 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2401
2402 c->Request.Type.Type = cmd_type;
2403 if (cmd_type == TYPE_CMD) {
2404 switch (cmd) {
2405 case CISS_INQUIRY:
2406 /* are we trying to read a vital product page */
2407 if (page_code != 0) {
2408 c->Request.CDB[1] = 0x01;
2409 c->Request.CDB[2] = page_code;
2410 }
2411 c->Request.CDBLen = 6;
2412 c->Request.Type.Attribute = ATTR_SIMPLE;
2413 c->Request.Type.Direction = XFER_READ;
2414 c->Request.Timeout = 0;
2415 c->Request.CDB[0] = CISS_INQUIRY;
2416 c->Request.CDB[4] = size & 0xFF;
2417 break;
2418 case CISS_REPORT_LOG:
2419 case CISS_REPORT_PHYS:
2420 /* Talking to controller so It's a physical command
2421 mode = 00 target = 0. Nothing to write.
2422 */
2423 c->Request.CDBLen = 12;
2424 c->Request.Type.Attribute = ATTR_SIMPLE;
2425 c->Request.Type.Direction = XFER_READ;
2426 c->Request.Timeout = 0;
2427 c->Request.CDB[0] = cmd;
2428 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
2429 c->Request.CDB[7] = (size >> 16) & 0xFF;
2430 c->Request.CDB[8] = (size >> 8) & 0xFF;
2431 c->Request.CDB[9] = size & 0xFF;
2432 break;
2433
2434 case CCISS_READ_CAPACITY:
2435 c->Request.CDBLen = 10;
2436 c->Request.Type.Attribute = ATTR_SIMPLE;
2437 c->Request.Type.Direction = XFER_READ;
2438 c->Request.Timeout = 0;
2439 c->Request.CDB[0] = cmd;
2440 break;
2441 case CCISS_READ_CAPACITY_16:
2442 c->Request.CDBLen = 16;
2443 c->Request.Type.Attribute = ATTR_SIMPLE;
2444 c->Request.Type.Direction = XFER_READ;
2445 c->Request.Timeout = 0;
2446 c->Request.CDB[0] = cmd;
2447 c->Request.CDB[1] = 0x10;
2448 c->Request.CDB[10] = (size >> 24) & 0xFF;
2449 c->Request.CDB[11] = (size >> 16) & 0xFF;
2450 c->Request.CDB[12] = (size >> 8) & 0xFF;
2451 c->Request.CDB[13] = size & 0xFF;
2452 c->Request.Timeout = 0;
2453 c->Request.CDB[0] = cmd;
2454 break;
2455 case CCISS_CACHE_FLUSH:
2456 c->Request.CDBLen = 12;
2457 c->Request.Type.Attribute = ATTR_SIMPLE;
2458 c->Request.Type.Direction = XFER_WRITE;
2459 c->Request.Timeout = 0;
2460 c->Request.CDB[0] = BMIC_WRITE;
2461 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2462 break;
2463 case TEST_UNIT_READY:
2464 c->Request.CDBLen = 6;
2465 c->Request.Type.Attribute = ATTR_SIMPLE;
2466 c->Request.Type.Direction = XFER_NONE;
2467 c->Request.Timeout = 0;
2468 break;
2469 default:
2470 printk(KERN_WARNING
2471 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
2472 return IO_ERROR;
2473 }
2474 } else if (cmd_type == TYPE_MSG) {
2475 switch (cmd) {
2476 case 0: /* ABORT message */
2477 c->Request.CDBLen = 12;
2478 c->Request.Type.Attribute = ATTR_SIMPLE;
2479 c->Request.Type.Direction = XFER_WRITE;
2480 c->Request.Timeout = 0;
2481 c->Request.CDB[0] = cmd; /* abort */
2482 c->Request.CDB[1] = 0; /* abort a command */
2483 /* buff contains the tag of the command to abort */
2484 memcpy(&c->Request.CDB[4], buff, 8);
2485 break;
2486 case 1: /* RESET message */
2487 c->Request.CDBLen = 16;
2488 c->Request.Type.Attribute = ATTR_SIMPLE;
2489 c->Request.Type.Direction = XFER_NONE;
2490 c->Request.Timeout = 0;
2491 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
2492 c->Request.CDB[0] = cmd; /* reset */
2493 c->Request.CDB[1] = 0x03; /* reset a target */
2494 break;
2495 case 3: /* No-Op message */
2496 c->Request.CDBLen = 1;
2497 c->Request.Type.Attribute = ATTR_SIMPLE;
2498 c->Request.Type.Direction = XFER_WRITE;
2499 c->Request.Timeout = 0;
2500 c->Request.CDB[0] = cmd;
2501 break;
2502 default:
2503 printk(KERN_WARNING
2504 "cciss%d: unknown message type %d\n", ctlr, cmd);
2505 return IO_ERROR;
2506 }
2507 } else {
2508 printk(KERN_WARNING
2509 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
2510 return IO_ERROR;
2511 }
2512 /* Fill in the scatter gather information */
2513 if (size > 0) {
2514 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
2515 buff, size,
2516 PCI_DMA_BIDIRECTIONAL);
2517 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2518 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2519 c->SG[0].Len = size;
2520 c->SG[0].Ext = 0; /* we are not chaining */
2521 }
2522 return status;
2523 }
2524
2525 static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2526 {
2527 switch (c->err_info->ScsiStatus) {
2528 case SAM_STAT_GOOD:
2529 return IO_OK;
2530 case SAM_STAT_CHECK_CONDITION:
2531 switch (0xf & c->err_info->SenseInfo[2]) {
2532 case 0: return IO_OK; /* no sense */
2533 case 1: return IO_OK; /* recovered error */
2534 default:
2535 if (check_for_unit_attention(h, c))
2536 return IO_NEEDS_RETRY;
2537 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2538 "check condition, sense key = 0x%02x\n",
2539 h->ctlr, c->Request.CDB[0],
2540 c->err_info->SenseInfo[2]);
2541 }
2542 break;
2543 default:
2544 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2545 "scsi status = 0x%02x\n", h->ctlr,
2546 c->Request.CDB[0], c->err_info->ScsiStatus);
2547 break;
2548 }
2549 return IO_ERROR;
2550 }
2551
2552 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
2553 {
2554 int return_status = IO_OK;
2555
2556 if (c->err_info->CommandStatus == CMD_SUCCESS)
2557 return IO_OK;
2558
2559 switch (c->err_info->CommandStatus) {
2560 case CMD_TARGET_STATUS:
2561 return_status = check_target_status(h, c);
2562 break;
2563 case CMD_DATA_UNDERRUN:
2564 case CMD_DATA_OVERRUN:
2565 /* expected for inquiry and report lun commands */
2566 break;
2567 case CMD_INVALID:
2568 printk(KERN_WARNING "cciss: cmd 0x%02x is "
2569 "reported invalid\n", c->Request.CDB[0]);
2570 return_status = IO_ERROR;
2571 break;
2572 case CMD_PROTOCOL_ERR:
2573 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2574 "protocol error \n", c->Request.CDB[0]);
2575 return_status = IO_ERROR;
2576 break;
2577 case CMD_HARDWARE_ERR:
2578 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2579 " hardware error\n", c->Request.CDB[0]);
2580 return_status = IO_ERROR;
2581 break;
2582 case CMD_CONNECTION_LOST:
2583 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2584 "connection lost\n", c->Request.CDB[0]);
2585 return_status = IO_ERROR;
2586 break;
2587 case CMD_ABORTED:
2588 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2589 "aborted\n", c->Request.CDB[0]);
2590 return_status = IO_ERROR;
2591 break;
2592 case CMD_ABORT_FAILED:
2593 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2594 "abort failed\n", c->Request.CDB[0]);
2595 return_status = IO_ERROR;
2596 break;
2597 case CMD_UNSOLICITED_ABORT:
2598 printk(KERN_WARNING
2599 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2600 c->Request.CDB[0]);
2601 return_status = IO_NEEDS_RETRY;
2602 break;
2603 default:
2604 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2605 "unknown status %x\n", c->Request.CDB[0],
2606 c->err_info->CommandStatus);
2607 return_status = IO_ERROR;
2608 }
2609 return return_status;
2610 }
2611
2612 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2613 int attempt_retry)
2614 {
2615 DECLARE_COMPLETION_ONSTACK(wait);
2616 u64bit buff_dma_handle;
2617 unsigned long flags;
2618 int return_status = IO_OK;
2619
2620 resend_cmd2:
2621 c->waiting = &wait;
2622 /* Put the request on the tail of the queue and send it */
2623 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2624 addQ(&h->reqQ, c);
2625 h->Qdepth++;
2626 start_io(h);
2627 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2628
2629 wait_for_completion(&wait);
2630
2631 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2632 goto command_done;
2633
2634 return_status = process_sendcmd_error(h, c);
2635
2636 if (return_status == IO_NEEDS_RETRY &&
2637 c->retry_count < MAX_CMD_RETRIES) {
2638 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2639 c->Request.CDB[0]);
2640 c->retry_count++;
2641 /* erase the old error information */
2642 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2643 return_status = IO_OK;
2644 INIT_COMPLETION(wait);
2645 goto resend_cmd2;
2646 }
2647
2648 command_done:
2649 /* unlock the buffers from DMA */
2650 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2651 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2652 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2653 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2654 return return_status;
2655 }
2656
2657 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2658 __u8 page_code, unsigned char scsi3addr[],
2659 int cmd_type)
2660 {
2661 ctlr_info_t *h = hba[ctlr];
2662 CommandList_struct *c;
2663 int return_status;
2664
2665 c = cmd_alloc(h, 0);
2666 if (!c)
2667 return -ENOMEM;
2668 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2669 scsi3addr, cmd_type);
2670 if (return_status == IO_OK)
2671 return_status = sendcmd_withirq_core(h, c, 1);
2672
2673 cmd_free(h, c, 0);
2674 return return_status;
2675 }
2676
2677 static void cciss_geometry_inquiry(int ctlr, int logvol,
2678 sector_t total_size,
2679 unsigned int block_size,
2680 InquiryData_struct *inq_buff,
2681 drive_info_struct *drv)
2682 {
2683 int return_code;
2684 unsigned long t;
2685 unsigned char scsi3addr[8];
2686
2687 memset(inq_buff, 0, sizeof(InquiryData_struct));
2688 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2689 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
2690 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
2691 if (return_code == IO_OK) {
2692 if (inq_buff->data_byte[8] == 0xFF) {
2693 printk(KERN_WARNING
2694 "cciss: reading geometry failed, volume "
2695 "does not support reading geometry\n");
2696 drv->heads = 255;
2697 drv->sectors = 32; // Sectors per track
2698 drv->cylinders = total_size + 1;
2699 drv->raid_level = RAID_UNKNOWN;
2700 } else {
2701 drv->heads = inq_buff->data_byte[6];
2702 drv->sectors = inq_buff->data_byte[7];
2703 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2704 drv->cylinders += inq_buff->data_byte[5];
2705 drv->raid_level = inq_buff->data_byte[8];
2706 }
2707 drv->block_size = block_size;
2708 drv->nr_blocks = total_size + 1;
2709 t = drv->heads * drv->sectors;
2710 if (t > 1) {
2711 sector_t real_size = total_size + 1;
2712 unsigned long rem = sector_div(real_size, t);
2713 if (rem)
2714 real_size++;
2715 drv->cylinders = real_size;
2716 }
2717 } else { /* Get geometry failed */
2718 printk(KERN_WARNING "cciss: reading geometry failed\n");
2719 }
2720 }
2721
2722 static void
2723 cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
2724 unsigned int *block_size)
2725 {
2726 ReadCapdata_struct *buf;
2727 int return_code;
2728 unsigned char scsi3addr[8];
2729
2730 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2731 if (!buf) {
2732 printk(KERN_WARNING "cciss: out of memory\n");
2733 return;
2734 }
2735
2736 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2737 return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
2738 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
2739 if (return_code == IO_OK) {
2740 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2741 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2742 } else { /* read capacity command failed */
2743 printk(KERN_WARNING "cciss: read capacity failed\n");
2744 *total_size = 0;
2745 *block_size = BLOCK_SIZE;
2746 }
2747 kfree(buf);
2748 }
2749
2750 static void cciss_read_capacity_16(int ctlr, int logvol,
2751 sector_t *total_size, unsigned int *block_size)
2752 {
2753 ReadCapdata_struct_16 *buf;
2754 int return_code;
2755 unsigned char scsi3addr[8];
2756
2757 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2758 if (!buf) {
2759 printk(KERN_WARNING "cciss: out of memory\n");
2760 return;
2761 }
2762
2763 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
2764 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2765 ctlr, buf, sizeof(ReadCapdata_struct_16),
2766 0, scsi3addr, TYPE_CMD);
2767 if (return_code == IO_OK) {
2768 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2769 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
2770 } else { /* read capacity command failed */
2771 printk(KERN_WARNING "cciss: read capacity failed\n");
2772 *total_size = 0;
2773 *block_size = BLOCK_SIZE;
2774 }
2775 printk(KERN_INFO " blocks= %llu block_size= %d\n",
2776 (unsigned long long)*total_size+1, *block_size);
2777 kfree(buf);
2778 }
2779
2780 static int cciss_revalidate(struct gendisk *disk)
2781 {
2782 ctlr_info_t *h = get_host(disk);
2783 drive_info_struct *drv = get_drv(disk);
2784 int logvol;
2785 int FOUND = 0;
2786 unsigned int block_size;
2787 sector_t total_size;
2788 InquiryData_struct *inq_buff = NULL;
2789
2790 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2791 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
2792 sizeof(drv->LunID)) == 0) {
2793 FOUND = 1;
2794 break;
2795 }
2796 }
2797
2798 if (!FOUND)
2799 return 1;
2800
2801 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2802 if (inq_buff == NULL) {
2803 printk(KERN_WARNING "cciss: out of memory\n");
2804 return 1;
2805 }
2806 if (h->cciss_read == CCISS_READ_10) {
2807 cciss_read_capacity(h->ctlr, logvol,
2808 &total_size, &block_size);
2809 } else {
2810 cciss_read_capacity_16(h->ctlr, logvol,
2811 &total_size, &block_size);
2812 }
2813 cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
2814 inq_buff, drv);
2815
2816 blk_queue_logical_block_size(drv->queue, drv->block_size);
2817 set_capacity(disk, drv->nr_blocks);
2818
2819 kfree(inq_buff);
2820 return 0;
2821 }
2822
2823 /*
2824 * Map (physical) PCI mem into (virtual) kernel space
2825 */
2826 static void __iomem *remap_pci_mem(ulong base, ulong size)
2827 {
2828 ulong page_base = ((ulong) base) & PAGE_MASK;
2829 ulong page_offs = ((ulong) base) - page_base;
2830 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2831
2832 return page_remapped ? (page_remapped + page_offs) : NULL;
2833 }
2834
2835 /*
2836 * Takes jobs of the Q and sends them to the hardware, then puts it on
2837 * the Q to wait for completion.
2838 */
2839 static void start_io(ctlr_info_t *h)
2840 {
2841 CommandList_struct *c;
2842
2843 while (!hlist_empty(&h->reqQ)) {
2844 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
2845 /* can't do anything if fifo is full */
2846 if ((h->access.fifo_full(h))) {
2847 printk(KERN_WARNING "cciss: fifo full\n");
2848 break;
2849 }
2850
2851 /* Get the first entry from the Request Q */
2852 removeQ(c);
2853 h->Qdepth--;
2854
2855 /* Tell the controller execute command */
2856 h->access.submit_command(h, c);
2857
2858 /* Put job onto the completed Q */
2859 addQ(&h->cmpQ, c);
2860 }
2861 }
2862
2863 /* Assumes that CCISS_LOCK(h->ctlr) is held. */
2864 /* Zeros out the error record and then resends the command back */
2865 /* to the controller */
2866 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
2867 {
2868 /* erase the old error information */
2869 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2870
2871 /* add it to software queue and then send it to the controller */
2872 addQ(&h->reqQ, c);
2873 h->Qdepth++;
2874 if (h->Qdepth > h->maxQsinceinit)
2875 h->maxQsinceinit = h->Qdepth;
2876
2877 start_io(h);
2878 }
2879
2880 static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2881 unsigned int msg_byte, unsigned int host_byte,
2882 unsigned int driver_byte)
2883 {
2884 /* inverse of macros in scsi.h */
2885 return (scsi_status_byte & 0xff) |
2886 ((msg_byte & 0xff) << 8) |
2887 ((host_byte & 0xff) << 16) |
2888 ((driver_byte & 0xff) << 24);
2889 }
2890
2891 static inline int evaluate_target_status(ctlr_info_t *h,
2892 CommandList_struct *cmd, int *retry_cmd)
2893 {
2894 unsigned char sense_key;
2895 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2896 int error_value;
2897
2898 *retry_cmd = 0;
2899 /* If we get in here, it means we got "target status", that is, scsi status */
2900 status_byte = cmd->err_info->ScsiStatus;
2901 driver_byte = DRIVER_OK;
2902 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2903
2904 if (blk_pc_request(cmd->rq))
2905 host_byte = DID_PASSTHROUGH;
2906 else
2907 host_byte = DID_OK;
2908
2909 error_value = make_status_bytes(status_byte, msg_byte,
2910 host_byte, driver_byte);
2911
2912 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
2913 if (!blk_pc_request(cmd->rq))
2914 printk(KERN_WARNING "cciss: cmd %p "
2915 "has SCSI Status 0x%x\n",
2916 cmd, cmd->err_info->ScsiStatus);
2917 return error_value;
2918 }
2919
2920 /* check the sense key */
2921 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2922 /* no status or recovered error */
2923 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2924 error_value = 0;
2925
2926 if (check_for_unit_attention(h, cmd)) {
2927 *retry_cmd = !blk_pc_request(cmd->rq);
2928 return 0;
2929 }
2930
2931 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
2932 if (error_value != 0)
2933 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2934 " sense key = 0x%x\n", cmd, sense_key);
2935 return error_value;
2936 }
2937
2938 /* SG_IO or similar, copy sense data back */
2939 if (cmd->rq->sense) {
2940 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
2941 cmd->rq->sense_len = cmd->err_info->SenseLen;
2942 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
2943 cmd->rq->sense_len);
2944 } else
2945 cmd->rq->sense_len = 0;
2946
2947 return error_value;
2948 }
2949
2950 /* checks the status of the job and calls complete buffers to mark all
2951 * buffers for the completed job. Note that this function does not need
2952 * to hold the hba/queue lock.
2953 */
2954 static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
2955 int timeout)
2956 {
2957 int retry_cmd = 0;
2958 struct request *rq = cmd->rq;
2959
2960 rq->errors = 0;
2961
2962 if (timeout)
2963 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
2964
2965 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
2966 goto after_error_processing;
2967
2968 switch (cmd->err_info->CommandStatus) {
2969 case CMD_TARGET_STATUS:
2970 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
2971 break;
2972 case CMD_DATA_UNDERRUN:
2973 if (blk_fs_request(cmd->rq)) {
2974 printk(KERN_WARNING "cciss: cmd %p has"
2975 " completed with data underrun "
2976 "reported\n", cmd);
2977 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
2978 }
2979 break;
2980 case CMD_DATA_OVERRUN:
2981 if (blk_fs_request(cmd->rq))
2982 printk(KERN_WARNING "cciss: cmd %p has"
2983 " completed with data overrun "
2984 "reported\n", cmd);
2985 break;
2986 case CMD_INVALID:
2987 printk(KERN_WARNING "cciss: cmd %p is "
2988 "reported invalid\n", cmd);
2989 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2990 cmd->err_info->CommandStatus, DRIVER_OK,
2991 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2992 break;
2993 case CMD_PROTOCOL_ERR:
2994 printk(KERN_WARNING "cciss: cmd %p has "
2995 "protocol error \n", cmd);
2996 rq->errors = make_status_bytes(SAM_STAT_GOOD,
2997 cmd->err_info->CommandStatus, DRIVER_OK,
2998 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
2999 break;
3000 case CMD_HARDWARE_ERR:
3001 printk(KERN_WARNING "cciss: cmd %p had "
3002 " hardware error\n", cmd);
3003 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3004 cmd->err_info->CommandStatus, DRIVER_OK,
3005 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3006 break;
3007 case CMD_CONNECTION_LOST:
3008 printk(KERN_WARNING "cciss: cmd %p had "
3009 "connection lost\n", cmd);
3010 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3011 cmd->err_info->CommandStatus, DRIVER_OK,
3012 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3013 break;
3014 case CMD_ABORTED:
3015 printk(KERN_WARNING "cciss: cmd %p was "
3016 "aborted\n", cmd);
3017 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3018 cmd->err_info->CommandStatus, DRIVER_OK,
3019 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
3020 break;
3021 case CMD_ABORT_FAILED:
3022 printk(KERN_WARNING "cciss: cmd %p reports "
3023 "abort failed\n", cmd);
3024 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3025 cmd->err_info->CommandStatus, DRIVER_OK,
3026 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3027 break;
3028 case CMD_UNSOLICITED_ABORT:
3029 printk(KERN_WARNING "cciss%d: unsolicited "
3030 "abort %p\n", h->ctlr, cmd);
3031 if (cmd->retry_count < MAX_CMD_RETRIES) {
3032 retry_cmd = 1;
3033 printk(KERN_WARNING
3034 "cciss%d: retrying %p\n", h->ctlr, cmd);
3035 cmd->retry_count++;
3036 } else
3037 printk(KERN_WARNING
3038 "cciss%d: %p retried too "
3039 "many times\n", h->ctlr, cmd);
3040 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3041 cmd->err_info->CommandStatus, DRIVER_OK,
3042 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
3043 break;
3044 case CMD_TIMEOUT:
3045 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
3046 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3047 cmd->err_info->CommandStatus, DRIVER_OK,
3048 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3049 break;
3050 default:
3051 printk(KERN_WARNING "cciss: cmd %p returned "
3052 "unknown status %x\n", cmd,
3053 cmd->err_info->CommandStatus);
3054 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3055 cmd->err_info->CommandStatus, DRIVER_OK,
3056 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
3057 }
3058
3059 after_error_processing:
3060
3061 /* We need to return this command */
3062 if (retry_cmd) {
3063 resend_cciss_cmd(h, cmd);
3064 return;
3065 }
3066 cmd->rq->completion_data = cmd;
3067 blk_complete_request(cmd->rq);
3068 }
3069
3070 /*
3071 * Get a request and submit it to the controller.
3072 */
3073 static void do_cciss_request(struct request_queue *q)
3074 {
3075 ctlr_info_t *h = q->queuedata;
3076 CommandList_struct *c;
3077 sector_t start_blk;
3078 int seg;
3079 struct request *creq;
3080 u64bit temp64;
3081 struct scatterlist *tmp_sg;
3082 SGDescriptor_struct *curr_sg;
3083 drive_info_struct *drv;
3084 int i, dir;
3085 int nseg = 0;
3086 int sg_index = 0;
3087 int chained = 0;
3088
3089 /* We call start_io here in case there is a command waiting on the
3090 * queue that has not been sent.
3091 */
3092 if (blk_queue_plugged(q))
3093 goto startio;
3094
3095 queue:
3096 creq = blk_peek_request(q);
3097 if (!creq)
3098 goto startio;
3099
3100 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
3101
3102 if ((c = cmd_alloc(h, 1)) == NULL)
3103 goto full;
3104
3105 blk_start_request(creq);
3106
3107 tmp_sg = h->scatter_list[c->cmdindex];
3108 spin_unlock_irq(q->queue_lock);
3109
3110 c->cmd_type = CMD_RWREQ;
3111 c->rq = creq;
3112
3113 /* fill in the request */
3114 drv = creq->rq_disk->private_data;
3115 c->Header.ReplyQueue = 0; // unused in simple mode
3116 /* got command from pool, so use the command block index instead */
3117 /* for direct lookups. */
3118 /* The first 2 bits are reserved for controller error reporting. */
3119 c->Header.Tag.lower = (c->cmdindex << 3);
3120 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
3121 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
3122 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3123 c->Request.Type.Type = TYPE_CMD; // It is a command.
3124 c->Request.Type.Attribute = ATTR_SIMPLE;
3125 c->Request.Type.Direction =
3126 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
3127 c->Request.Timeout = 0; // Don't time out
3128 c->Request.CDB[0] =
3129 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
3130 start_blk = blk_rq_pos(creq);
3131 #ifdef CCISS_DEBUG
3132 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3133 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
3134 #endif /* CCISS_DEBUG */
3135
3136 sg_init_table(tmp_sg, h->maxsgentries);
3137 seg = blk_rq_map_sg(q, creq, tmp_sg);
3138
3139 /* get the DMA records for the setup */
3140 if (c->Request.Type.Direction == XFER_READ)
3141 dir = PCI_DMA_FROMDEVICE;
3142 else
3143 dir = PCI_DMA_TODEVICE;
3144
3145 curr_sg = c->SG;
3146 sg_index = 0;
3147 chained = 0;
3148
3149 for (i = 0; i < seg; i++) {
3150 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3151 !chained && ((seg - i) > 1)) {
3152 nseg = seg - i;
3153 curr_sg[sg_index].Len = (nseg) *
3154 sizeof(SGDescriptor_struct);
3155 curr_sg[sg_index].Ext = CCISS_SG_CHAIN;
3156
3157 /* Point to next chain block. */
3158 curr_sg = h->cmd_sg_list[c->cmdindex]->sgchain;
3159 sg_index = 0;
3160 chained = 1;
3161 }
3162 curr_sg[sg_index].Len = tmp_sg[i].length;
3163 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
3164 tmp_sg[i].offset,
3165 tmp_sg[i].length, dir);
3166 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3167 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3168 curr_sg[sg_index].Ext = 0; /* we are not chaining */
3169
3170 ++sg_index;
3171 }
3172
3173 if (chained) {
3174 int len;
3175 curr_sg = c->SG;
3176 sg_index = h->max_cmd_sgentries - 1;
3177 len = curr_sg[sg_index].Len;
3178 /* Setup pointer to next chain block.
3179 * Fill out last element in current chain
3180 * block with address of next chain block.
3181 */
3182 temp64.val = pci_map_single(h->pdev,
3183 h->cmd_sg_list[c->cmdindex]->sgchain,
3184 len, dir);
3185
3186 h->cmd_sg_list[c->cmdindex]->sg_chain_dma = temp64.val;
3187 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3188 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3189
3190 pci_dma_sync_single_for_device(h->pdev,
3191 h->cmd_sg_list[c->cmdindex]->sg_chain_dma,
3192 len, dir);
3193 }
3194
3195 /* track how many SG entries we are using */
3196 if (seg > h->maxSG)
3197 h->maxSG = seg;
3198
3199 #ifdef CCISS_DEBUG
3200 printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
3201 "chained[%d]\n",
3202 blk_rq_sectors(creq), seg, chained);
3203 #endif /* CCISS_DEBUG */
3204
3205 c->Header.SGList = c->Header.SGTotal = seg + chained;
3206 if (seg > h->max_cmd_sgentries)
3207 c->Header.SGList = h->max_cmd_sgentries;
3208
3209 if (likely(blk_fs_request(creq))) {
3210 if(h->cciss_read == CCISS_READ_10) {
3211 c->Request.CDB[1] = 0;
3212 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3213 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3214 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3215 c->Request.CDB[5] = start_blk & 0xff;
3216 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
3217 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3218 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
3219 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3220 } else {
3221 u32 upper32 = upper_32_bits(start_blk);
3222
3223 c->Request.CDBLen = 16;
3224 c->Request.CDB[1]= 0;
3225 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3226 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3227 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3228 c->Request.CDB[5]= upper32 & 0xff;
3229 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3230 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3231 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3232 c->Request.CDB[9]= start_blk & 0xff;
3233 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3234 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3235 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3236 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
3237 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3238 }
3239 } else if (blk_pc_request(creq)) {
3240 c->Request.CDBLen = creq->cmd_len;
3241 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
3242 } else {
3243 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3244 BUG();
3245 }
3246
3247 spin_lock_irq(q->queue_lock);
3248
3249 addQ(&h->reqQ, c);
3250 h->Qdepth++;
3251 if (h->Qdepth > h->maxQsinceinit)
3252 h->maxQsinceinit = h->Qdepth;
3253
3254 goto queue;
3255 full:
3256 blk_stop_queue(q);
3257 startio:
3258 /* We will already have the driver lock here so not need
3259 * to lock it.
3260 */
3261 start_io(h);
3262 }
3263
3264 static inline unsigned long get_next_completion(ctlr_info_t *h)
3265 {
3266 return h->access.command_completed(h);
3267 }
3268
3269 static inline int interrupt_pending(ctlr_info_t *h)
3270 {
3271 return h->access.intr_pending(h);
3272 }
3273
3274 static inline long interrupt_not_for_us(ctlr_info_t *h)
3275 {
3276 return (((h->access.intr_pending(h) == 0) ||
3277 (h->interrupts_enabled == 0)));
3278 }
3279
3280 static irqreturn_t do_cciss_intr(int irq, void *dev_id)
3281 {
3282 ctlr_info_t *h = dev_id;
3283 CommandList_struct *c;
3284 unsigned long flags;
3285 __u32 a, a1, a2;
3286
3287 if (interrupt_not_for_us(h))
3288 return IRQ_NONE;
3289 /*
3290 * If there are completed commands in the completion queue,
3291 * we had better do something about it.
3292 */
3293 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3294 while (interrupt_pending(h)) {
3295 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
3296 a1 = a;
3297 if ((a & 0x04)) {
3298 a2 = (a >> 3);
3299 if (a2 >= h->nr_cmds) {
3300 printk(KERN_WARNING
3301 "cciss: controller cciss%d failed, stopping.\n",
3302 h->ctlr);
3303 fail_all_cmds(h->ctlr);
3304 return IRQ_HANDLED;
3305 }
3306
3307 c = h->cmd_pool + a2;
3308 a = c->busaddr;
3309
3310 } else {
3311 struct hlist_node *tmp;
3312
3313 a &= ~3;
3314 c = NULL;
3315 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3316 if (c->busaddr == a)
3317 break;
3318 }
3319 }
3320 /*
3321 * If we've found the command, take it off the
3322 * completion Q and free it
3323 */
3324 if (c && c->busaddr == a) {
3325 removeQ(c);
3326 if (c->cmd_type == CMD_RWREQ) {
3327 complete_command(h, c, 0);
3328 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3329 complete(c->waiting);
3330 }
3331 # ifdef CONFIG_CISS_SCSI_TAPE
3332 else if (c->cmd_type == CMD_SCSI)
3333 complete_scsi_command(c, 0, a1);
3334 # endif
3335 continue;
3336 }
3337 }
3338 }
3339
3340 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3341 return IRQ_HANDLED;
3342 }
3343
3344 /**
3345 * add_to_scan_list() - add controller to rescan queue
3346 * @h: Pointer to the controller.
3347 *
3348 * Adds the controller to the rescan queue if not already on the queue.
3349 *
3350 * returns 1 if added to the queue, 0 if skipped (could be on the
3351 * queue already, or the controller could be initializing or shutting
3352 * down).
3353 **/
3354 static int add_to_scan_list(struct ctlr_info *h)
3355 {
3356 struct ctlr_info *test_h;
3357 int found = 0;
3358 int ret = 0;
3359
3360 if (h->busy_initializing)
3361 return 0;
3362
3363 if (!mutex_trylock(&h->busy_shutting_down))
3364 return 0;
3365
3366 mutex_lock(&scan_mutex);
3367 list_for_each_entry(test_h, &scan_q, scan_list) {
3368 if (test_h == h) {
3369 found = 1;
3370 break;
3371 }
3372 }
3373 if (!found && !h->busy_scanning) {
3374 INIT_COMPLETION(h->scan_wait);
3375 list_add_tail(&h->scan_list, &scan_q);
3376 ret = 1;
3377 }
3378 mutex_unlock(&scan_mutex);
3379 mutex_unlock(&h->busy_shutting_down);
3380
3381 return ret;
3382 }
3383
3384 /**
3385 * remove_from_scan_list() - remove controller from rescan queue
3386 * @h: Pointer to the controller.
3387 *
3388 * Removes the controller from the rescan queue if present. Blocks if
3389 * the controller is currently conducting a rescan. The controller
3390 * can be in one of three states:
3391 * 1. Doesn't need a scan
3392 * 2. On the scan list, but not scanning yet (we remove it)
3393 * 3. Busy scanning (and not on the list). In this case we want to wait for
3394 * the scan to complete to make sure the scanning thread for this
3395 * controller is completely idle.
3396 **/
3397 static void remove_from_scan_list(struct ctlr_info *h)
3398 {
3399 struct ctlr_info *test_h, *tmp_h;
3400
3401 mutex_lock(&scan_mutex);
3402 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3403 if (test_h == h) { /* state 2. */
3404 list_del(&h->scan_list);
3405 complete_all(&h->scan_wait);
3406 mutex_unlock(&scan_mutex);
3407 return;
3408 }
3409 }
3410 if (h->busy_scanning) { /* state 3. */
3411 mutex_unlock(&scan_mutex);
3412 wait_for_completion(&h->scan_wait);
3413 } else { /* state 1, nothing to do. */
3414 mutex_unlock(&scan_mutex);
3415 }
3416 }
3417
3418 /**
3419 * scan_thread() - kernel thread used to rescan controllers
3420 * @data: Ignored.
3421 *
3422 * A kernel thread used scan for drive topology changes on
3423 * controllers. The thread processes only one controller at a time
3424 * using a queue. Controllers are added to the queue using
3425 * add_to_scan_list() and removed from the queue either after done
3426 * processing or using remove_from_scan_list().
3427 *
3428 * returns 0.
3429 **/
3430 static int scan_thread(void *data)
3431 {
3432 struct ctlr_info *h;
3433
3434 while (1) {
3435 set_current_state(TASK_INTERRUPTIBLE);
3436 schedule();
3437 if (kthread_should_stop())
3438 break;
3439
3440 while (1) {
3441 mutex_lock(&scan_mutex);
3442 if (list_empty(&scan_q)) {
3443 mutex_unlock(&scan_mutex);
3444 break;
3445 }
3446
3447 h = list_entry(scan_q.next,
3448 struct ctlr_info,
3449 scan_list);
3450 list_del(&h->scan_list);
3451 h->busy_scanning = 1;
3452 mutex_unlock(&scan_mutex);
3453
3454 rebuild_lun_table(h, 0, 0);
3455 complete_all(&h->scan_wait);
3456 mutex_lock(&scan_mutex);
3457 h->busy_scanning = 0;
3458 mutex_unlock(&scan_mutex);
3459 }
3460 }
3461
3462 return 0;
3463 }
3464
3465 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3466 {
3467 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3468 return 0;
3469
3470 switch (c->err_info->SenseInfo[12]) {
3471 case STATE_CHANGED:
3472 printk(KERN_WARNING "cciss%d: a state change "
3473 "detected, command retried\n", h->ctlr);
3474 return 1;
3475 break;
3476 case LUN_FAILED:
3477 printk(KERN_WARNING "cciss%d: LUN failure "
3478 "detected, action required\n", h->ctlr);
3479 return 1;
3480 break;
3481 case REPORT_LUNS_CHANGED:
3482 printk(KERN_WARNING "cciss%d: report LUN data "
3483 "changed\n", h->ctlr);
3484 /*
3485 * Here, we could call add_to_scan_list and wake up the scan thread,
3486 * except that it's quite likely that we will get more than one
3487 * REPORT_LUNS_CHANGED condition in quick succession, which means
3488 * that those which occur after the first one will likely happen
3489 * *during* the scan_thread's rescan. And the rescan code is not
3490 * robust enough to restart in the middle, undoing what it has already
3491 * done, and it's not clear that it's even possible to do this, since
3492 * part of what it does is notify the block layer, which starts
3493 * doing it's own i/o to read partition tables and so on, and the
3494 * driver doesn't have visibility to know what might need undoing.
3495 * In any event, if possible, it is horribly complicated to get right
3496 * so we just don't do it for now.
3497 *
3498 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3499 */
3500 return 1;
3501 break;
3502 case POWER_OR_RESET:
3503 printk(KERN_WARNING "cciss%d: a power on "
3504 "or device reset detected\n", h->ctlr);
3505 return 1;
3506 break;
3507 case UNIT_ATTENTION_CLEARED:
3508 printk(KERN_WARNING "cciss%d: unit attention "
3509 "cleared by another initiator\n", h->ctlr);
3510 return 1;
3511 break;
3512 default:
3513 printk(KERN_WARNING "cciss%d: unknown "
3514 "unit attention detected\n", h->ctlr);
3515 return 1;
3516 }
3517 }
3518
3519 /*
3520 * We cannot read the structure directly, for portability we must use
3521 * the io functions.
3522 * This is for debug only.
3523 */
3524 #ifdef CCISS_DEBUG
3525 static void print_cfg_table(CfgTable_struct *tb)
3526 {
3527 int i;
3528 char temp_name[17];
3529
3530 printk("Controller Configuration information\n");
3531 printk("------------------------------------\n");
3532 for (i = 0; i < 4; i++)
3533 temp_name[i] = readb(&(tb->Signature[i]));
3534 temp_name[4] = '\0';
3535 printk(" Signature = %s\n", temp_name);
3536 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
3537 printk(" Transport methods supported = 0x%x\n",
3538 readl(&(tb->TransportSupport)));
3539 printk(" Transport methods active = 0x%x\n",
3540 readl(&(tb->TransportActive)));
3541 printk(" Requested transport Method = 0x%x\n",
3542 readl(&(tb->HostWrite.TransportRequest)));
3543 printk(" Coalesce Interrupt Delay = 0x%x\n",
3544 readl(&(tb->HostWrite.CoalIntDelay)));
3545 printk(" Coalesce Interrupt Count = 0x%x\n",
3546 readl(&(tb->HostWrite.CoalIntCount)));
3547 printk(" Max outstanding commands = 0x%d\n",
3548 readl(&(tb->CmdsOutMax)));
3549 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3550 for (i = 0; i < 16; i++)
3551 temp_name[i] = readb(&(tb->ServerName[i]));
3552 temp_name[16] = '\0';
3553 printk(" Server Name = %s\n", temp_name);
3554 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
3555 }
3556 #endif /* CCISS_DEBUG */
3557
3558 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3559 {
3560 int i, offset, mem_type, bar_type;
3561 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3562 return 0;
3563 offset = 0;
3564 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3565 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3566 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3567 offset += 4;
3568 else {
3569 mem_type = pci_resource_flags(pdev, i) &
3570 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3571 switch (mem_type) {
3572 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3573 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3574 offset += 4; /* 32 bit */
3575 break;
3576 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3577 offset += 8;
3578 break;
3579 default: /* reserved in PCI 2.2 */
3580 printk(KERN_WARNING
3581 "Base address is invalid\n");
3582 return -1;
3583 break;
3584 }
3585 }
3586 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3587 return i + 1;
3588 }
3589 return -1;
3590 }
3591
3592 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3593 * controllers that are capable. If not, we use IO-APIC mode.
3594 */
3595
3596 static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3597 struct pci_dev *pdev, __u32 board_id)
3598 {
3599 #ifdef CONFIG_PCI_MSI
3600 int err;
3601 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3602 {0, 2}, {0, 3}
3603 };
3604
3605 /* Some boards advertise MSI but don't really support it */
3606 if ((board_id == 0x40700E11) ||
3607 (board_id == 0x40800E11) ||
3608 (board_id == 0x40820E11) || (board_id == 0x40830E11))
3609 goto default_int_mode;
3610
3611 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3612 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3613 if (!err) {
3614 c->intr[0] = cciss_msix_entries[0].vector;
3615 c->intr[1] = cciss_msix_entries[1].vector;
3616 c->intr[2] = cciss_msix_entries[2].vector;
3617 c->intr[3] = cciss_msix_entries[3].vector;
3618 c->msix_vector = 1;
3619 return;
3620 }
3621 if (err > 0) {
3622 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3623 "available\n", err);
3624 goto default_int_mode;
3625 } else {
3626 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3627 err);
3628 goto default_int_mode;
3629 }
3630 }
3631 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3632 if (!pci_enable_msi(pdev)) {
3633 c->msi_vector = 1;
3634 } else {
3635 printk(KERN_WARNING "cciss: MSI init failed\n");
3636 }
3637 }
3638 default_int_mode:
3639 #endif /* CONFIG_PCI_MSI */
3640 /* if we get here we're going to use the default interrupt mode */
3641 c->intr[SIMPLE_MODE_INT] = pdev->irq;
3642 return;
3643 }
3644
3645 static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
3646 {
3647 ushort subsystem_vendor_id, subsystem_device_id, command;
3648 __u32 board_id, scratchpad = 0;
3649 __u64 cfg_offset;
3650 __u32 cfg_base_addr;
3651 __u64 cfg_base_addr_index;
3652 int i, prod_index, err;
3653
3654 subsystem_vendor_id = pdev->subsystem_vendor;
3655 subsystem_device_id = pdev->subsystem_device;
3656 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
3657 subsystem_vendor_id);
3658
3659 for (i = 0; i < ARRAY_SIZE(products); i++) {
3660 /* Stand aside for hpsa driver on request */
3661 if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
3662 return -ENODEV;
3663 if (board_id == products[i].board_id)
3664 break;
3665 }
3666 prod_index = i;
3667 if (prod_index == ARRAY_SIZE(products)) {
3668 dev_warn(&pdev->dev,
3669 "unrecognized board ID: 0x%08lx, ignoring.\n",
3670 (unsigned long) board_id);
3671 return -ENODEV;
3672 }
3673
3674 /* check to see if controller has been disabled */
3675 /* BEFORE trying to enable it */
3676 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3677 if (!(command & 0x02)) {
3678 printk(KERN_WARNING
3679 "cciss: controller appears to be disabled\n");
3680 return -ENODEV;
3681 }
3682
3683 err = pci_enable_device(pdev);
3684 if (err) {
3685 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
3686 return err;
3687 }
3688
3689 err = pci_request_regions(pdev, "cciss");
3690 if (err) {
3691 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
3692 "aborting\n");
3693 return err;
3694 }
3695
3696 #ifdef CCISS_DEBUG
3697 printk("command = %x\n", command);
3698 printk("irq = %x\n", pdev->irq);
3699 printk("board_id = %x\n", board_id);
3700 #endif /* CCISS_DEBUG */
3701
3702 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3703 * else we use the IO-APIC interrupt assigned to us by system ROM.
3704 */
3705 cciss_interrupt_mode(c, pdev, board_id);
3706
3707 /* find the memory BAR */
3708 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3709 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3710 break;
3711 }
3712 if (i == DEVICE_COUNT_RESOURCE) {
3713 printk(KERN_WARNING "cciss: No memory BAR found\n");
3714 err = -ENODEV;
3715 goto err_out_free_res;
3716 }
3717
3718 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3719 * already removed
3720 */
3721
3722 #ifdef CCISS_DEBUG
3723 printk("address 0 = %lx\n", c->paddr);
3724 #endif /* CCISS_DEBUG */
3725 c->vaddr = remap_pci_mem(c->paddr, 0x250);
3726
3727 /* Wait for the board to become ready. (PCI hotplug needs this.)
3728 * We poll for up to 120 secs, once per 100ms. */
3729 for (i = 0; i < 1200; i++) {
3730 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3731 if (scratchpad == CCISS_FIRMWARE_READY)
3732 break;
3733 set_current_state(TASK_INTERRUPTIBLE);
3734 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
3735 }
3736 if (scratchpad != CCISS_FIRMWARE_READY) {
3737 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
3738 err = -ENODEV;
3739 goto err_out_free_res;
3740 }
3741
3742 /* get the address index number */
3743 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3744 cfg_base_addr &= (__u32) 0x0000ffff;
3745 #ifdef CCISS_DEBUG
3746 printk("cfg base address = %x\n", cfg_base_addr);
3747 #endif /* CCISS_DEBUG */
3748 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
3749 #ifdef CCISS_DEBUG
3750 printk("cfg base address index = %llx\n",
3751 (unsigned long long)cfg_base_addr_index);
3752 #endif /* CCISS_DEBUG */
3753 if (cfg_base_addr_index == -1) {
3754 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
3755 err = -ENODEV;
3756 goto err_out_free_res;
3757 }
3758
3759 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3760 #ifdef CCISS_DEBUG
3761 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
3762 #endif /* CCISS_DEBUG */
3763 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3764 cfg_base_addr_index) +
3765 cfg_offset, sizeof(CfgTable_struct));
3766 c->board_id = board_id;
3767
3768 #ifdef CCISS_DEBUG
3769 print_cfg_table(c->cfgtable);
3770 #endif /* CCISS_DEBUG */
3771
3772 /* Some controllers support Zero Memory Raid (ZMR).
3773 * When configured in ZMR mode the number of supported
3774 * commands drops to 64. So instead of just setting an
3775 * arbitrary value we make the driver a little smarter.
3776 * We read the config table to tell us how many commands
3777 * are supported on the controller then subtract 4 to
3778 * leave a little room for ioctl calls.
3779 */
3780 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
3781 c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
3782
3783 /*
3784 * Limit native command to 32 s/g elements to save dma'able memory.
3785 * Howvever spec says if 0, use 31
3786 */
3787
3788 c->max_cmd_sgentries = 31;
3789 if (c->maxsgentries > 512) {
3790 c->max_cmd_sgentries = 32;
3791 c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
3792 c->maxsgentries -= 1; /* account for chain pointer */
3793 } else {
3794 c->maxsgentries = 31; /* Default to traditional value */
3795 c->chainsize = 0; /* traditional */
3796 }
3797
3798 c->product_name = products[prod_index].product_name;
3799 c->access = *(products[prod_index].access);
3800 c->nr_cmds = c->max_commands - 4;
3801 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3802 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3803 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3804 (readb(&c->cfgtable->Signature[3]) != 'S')) {
3805 printk("Does not appear to be a valid CISS config table\n");
3806 err = -ENODEV;
3807 goto err_out_free_res;
3808 }
3809 #ifdef CONFIG_X86
3810 {
3811 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3812 __u32 prefetch;
3813 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3814 prefetch |= 0x100;
3815 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3816 }
3817 #endif
3818
3819 /* Disabling DMA prefetch and refetch for the P600.
3820 * An ASIC bug may result in accesses to invalid memory addresses.
3821 * We've disabled prefetch for some time now. Testing with XEN
3822 * kernels revealed a bug in the refetch if dom0 resides on a P600.
3823 */
3824 if(board_id == 0x3225103C) {
3825 __u32 dma_prefetch;
3826 __u32 dma_refetch;
3827 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3828 dma_prefetch |= 0x8000;
3829 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
3830 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3831 dma_refetch |= 0x1;
3832 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
3833 }
3834
3835 #ifdef CCISS_DEBUG
3836 printk("Trying to put board into Simple mode\n");
3837 #endif /* CCISS_DEBUG */
3838 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
3839 /* Update the field, and then ring the doorbell */
3840 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3841 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
3842
3843 /* under certain very rare conditions, this can take awhile.
3844 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3845 * as we enter this code.) */
3846 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3847 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3848 break;
3849 /* delay and try again */
3850 set_current_state(TASK_INTERRUPTIBLE);
3851 schedule_timeout(msecs_to_jiffies(1));
3852 }
3853
3854 #ifdef CCISS_DEBUG
3855 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3856 readl(c->vaddr + SA5_DOORBELL));
3857 #endif /* CCISS_DEBUG */
3858 #ifdef CCISS_DEBUG
3859 print_cfg_table(c->cfgtable);
3860 #endif /* CCISS_DEBUG */
3861
3862 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3863 printk(KERN_WARNING "cciss: unable to get board into"
3864 " simple mode\n");
3865 err = -ENODEV;
3866 goto err_out_free_res;
3867 }
3868 return 0;
3869
3870 err_out_free_res:
3871 /*
3872 * Deliberately omit pci_disable_device(): it does something nasty to
3873 * Smart Array controllers that pci_enable_device does not undo
3874 */
3875 pci_release_regions(pdev);
3876 return err;
3877 }
3878
3879 /* Function to find the first free pointer into our hba[] array
3880 * Returns -1 if no free entries are left.
3881 */
3882 static int alloc_cciss_hba(void)
3883 {
3884 int i;
3885
3886 for (i = 0; i < MAX_CTLR; i++) {
3887 if (!hba[i]) {
3888 ctlr_info_t *p;
3889
3890 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
3891 if (!p)
3892 goto Enomem;
3893 hba[i] = p;
3894 return i;
3895 }
3896 }
3897 printk(KERN_WARNING "cciss: This driver supports a maximum"
3898 " of %d controllers.\n", MAX_CTLR);
3899 return -1;
3900 Enomem:
3901 printk(KERN_ERR "cciss: out of memory.\n");
3902 return -1;
3903 }
3904
3905 static void free_hba(int n)
3906 {
3907 ctlr_info_t *h = hba[n];
3908 int i;
3909
3910 hba[n] = NULL;
3911 for (i = 0; i < h->highest_lun + 1; i++)
3912 if (h->gendisk[i] != NULL)
3913 put_disk(h->gendisk[i]);
3914 kfree(h);
3915 }
3916
3917 /* Send a message CDB to the firmware. */
3918 static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3919 {
3920 typedef struct {
3921 CommandListHeader_struct CommandHeader;
3922 RequestBlock_struct Request;
3923 ErrDescriptor_struct ErrorDescriptor;
3924 } Command;
3925 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3926 Command *cmd;
3927 dma_addr_t paddr64;
3928 uint32_t paddr32, tag;
3929 void __iomem *vaddr;
3930 int i, err;
3931
3932 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3933 if (vaddr == NULL)
3934 return -ENOMEM;
3935
3936 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3937 CCISS commands, so they must be allocated from the lower 4GiB of
3938 memory. */
3939 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3940 if (err) {
3941 iounmap(vaddr);
3942 return -ENOMEM;
3943 }
3944
3945 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3946 if (cmd == NULL) {
3947 iounmap(vaddr);
3948 return -ENOMEM;
3949 }
3950
3951 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3952 although there's no guarantee, we assume that the address is at
3953 least 4-byte aligned (most likely, it's page-aligned). */
3954 paddr32 = paddr64;
3955
3956 cmd->CommandHeader.ReplyQueue = 0;
3957 cmd->CommandHeader.SGList = 0;
3958 cmd->CommandHeader.SGTotal = 0;
3959 cmd->CommandHeader.Tag.lower = paddr32;
3960 cmd->CommandHeader.Tag.upper = 0;
3961 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3962
3963 cmd->Request.CDBLen = 16;
3964 cmd->Request.Type.Type = TYPE_MSG;
3965 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3966 cmd->Request.Type.Direction = XFER_NONE;
3967 cmd->Request.Timeout = 0; /* Don't time out */
3968 cmd->Request.CDB[0] = opcode;
3969 cmd->Request.CDB[1] = type;
3970 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3971
3972 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3973 cmd->ErrorDescriptor.Addr.upper = 0;
3974 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3975
3976 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3977
3978 for (i = 0; i < 10; i++) {
3979 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3980 if ((tag & ~3) == paddr32)
3981 break;
3982 schedule_timeout_uninterruptible(HZ);
3983 }
3984
3985 iounmap(vaddr);
3986
3987 /* we leak the DMA buffer here ... no choice since the controller could
3988 still complete the command. */
3989 if (i == 10) {
3990 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3991 opcode, type);
3992 return -ETIMEDOUT;
3993 }
3994
3995 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3996
3997 if (tag & 2) {
3998 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3999 opcode, type);
4000 return -EIO;
4001 }
4002
4003 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
4004 opcode, type);
4005 return 0;
4006 }
4007
4008 #define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
4009 #define cciss_noop(p) cciss_message(p, 3, 0)
4010
4011 static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4012 {
4013 /* the #defines are stolen from drivers/pci/msi.h. */
4014 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4015 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4016
4017 int pos;
4018 u16 control = 0;
4019
4020 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4021 if (pos) {
4022 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4023 if (control & PCI_MSI_FLAGS_ENABLE) {
4024 printk(KERN_INFO "cciss: resetting MSI\n");
4025 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4026 }
4027 }
4028
4029 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4030 if (pos) {
4031 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4032 if (control & PCI_MSIX_FLAGS_ENABLE) {
4033 printk(KERN_INFO "cciss: resetting MSI-X\n");
4034 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4035 }
4036 }
4037
4038 return 0;
4039 }
4040
4041 /* This does a hard reset of the controller using PCI power management
4042 * states. */
4043 static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4044 {
4045 u16 pmcsr, saved_config_space[32];
4046 int i, pos;
4047
4048 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4049
4050 /* This is very nearly the same thing as
4051
4052 pci_save_state(pci_dev);
4053 pci_set_power_state(pci_dev, PCI_D3hot);
4054 pci_set_power_state(pci_dev, PCI_D0);
4055 pci_restore_state(pci_dev);
4056
4057 but we can't use these nice canned kernel routines on
4058 kexec, because they also check the MSI/MSI-X state in PCI
4059 configuration space and do the wrong thing when it is
4060 set/cleared. Also, the pci_save/restore_state functions
4061 violate the ordering requirements for restoring the
4062 configuration space from the CCISS document (see the
4063 comment below). So we roll our own .... */
4064
4065 for (i = 0; i < 32; i++)
4066 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4067
4068 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4069 if (pos == 0) {
4070 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4071 return -ENODEV;
4072 }
4073
4074 /* Quoting from the Open CISS Specification: "The Power
4075 * Management Control/Status Register (CSR) controls the power
4076 * state of the device. The normal operating state is D0,
4077 * CSR=00h. The software off state is D3, CSR=03h. To reset
4078 * the controller, place the interface device in D3 then to
4079 * D0, this causes a secondary PCI reset which will reset the
4080 * controller." */
4081
4082 /* enter the D3hot power management state */
4083 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4084 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4085 pmcsr |= PCI_D3hot;
4086 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4087
4088 schedule_timeout_uninterruptible(HZ >> 1);
4089
4090 /* enter the D0 power management state */
4091 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4092 pmcsr |= PCI_D0;
4093 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4094
4095 schedule_timeout_uninterruptible(HZ >> 1);
4096
4097 /* Restore the PCI configuration space. The Open CISS
4098 * Specification says, "Restore the PCI Configuration
4099 * Registers, offsets 00h through 60h. It is important to
4100 * restore the command register, 16-bits at offset 04h,
4101 * last. Do not restore the configuration status register,
4102 * 16-bits at offset 06h." Note that the offset is 2*i. */
4103 for (i = 0; i < 32; i++) {
4104 if (i == 2 || i == 3)
4105 continue;
4106 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4107 }
4108 wmb();
4109 pci_write_config_word(pdev, 4, saved_config_space[2]);
4110
4111 return 0;
4112 }
4113
4114 /*
4115 * This is it. Find all the controllers and register them. I really hate
4116 * stealing all these major device numbers.
4117 * returns the number of block devices registered.
4118 */
4119 static int __devinit cciss_init_one(struct pci_dev *pdev,
4120 const struct pci_device_id *ent)
4121 {
4122 int i;
4123 int j = 0;
4124 int k = 0;
4125 int rc;
4126 int dac, return_code;
4127 InquiryData_struct *inq_buff;
4128
4129 if (reset_devices) {
4130 /* Reset the controller with a PCI power-cycle */
4131 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4132 return -ENODEV;
4133
4134 /* Now try to get the controller to respond to a no-op. Some
4135 devices (notably the HP Smart Array 5i Controller) need
4136 up to 30 seconds to respond. */
4137 for (i=0; i<30; i++) {
4138 if (cciss_noop(pdev) == 0)
4139 break;
4140
4141 schedule_timeout_uninterruptible(HZ);
4142 }
4143 if (i == 30) {
4144 printk(KERN_ERR "cciss: controller seems dead\n");
4145 return -EBUSY;
4146 }
4147 }
4148
4149 i = alloc_cciss_hba();
4150 if (i < 0)
4151 return -1;
4152
4153 hba[i]->busy_initializing = 1;
4154 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4155 INIT_HLIST_HEAD(&hba[i]->reqQ);
4156 mutex_init(&hba[i]->busy_shutting_down);
4157
4158 if (cciss_pci_init(hba[i], pdev) != 0)
4159 goto clean_no_release_regions;
4160
4161 sprintf(hba[i]->devname, "cciss%d", i);
4162 hba[i]->ctlr = i;
4163 hba[i]->pdev = pdev;
4164
4165 init_completion(&hba[i]->scan_wait);
4166
4167 if (cciss_create_hba_sysfs_entry(hba[i]))
4168 goto clean0;
4169
4170 /* configure PCI DMA stuff */
4171 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
4172 dac = 1;
4173 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
4174 dac = 0;
4175 else {
4176 printk(KERN_ERR "cciss: no suitable DMA available\n");
4177 goto clean1;
4178 }
4179
4180 /*
4181 * register with the major number, or get a dynamic major number
4182 * by passing 0 as argument. This is done for greater than
4183 * 8 controller support.
4184 */
4185 if (i < MAX_CTLR_ORIG)
4186 hba[i]->major = COMPAQ_CISS_MAJOR + i;
4187 rc = register_blkdev(hba[i]->major, hba[i]->devname);
4188 if (rc == -EBUSY || rc == -EINVAL) {
4189 printk(KERN_ERR
4190 "cciss: Unable to get major number %d for %s "
4191 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
4192 goto clean1;
4193 } else {
4194 if (i >= MAX_CTLR_ORIG)
4195 hba[i]->major = rc;
4196 }
4197
4198 /* make sure the board interrupts are off */
4199 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
4200 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
4201 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
4202 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
4203 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
4204 goto clean2;
4205 }
4206
4207 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
4208 hba[i]->devname, pdev->device, pci_name(pdev),
4209 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4210
4211 hba[i]->cmd_pool_bits =
4212 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4213 * sizeof(unsigned long), GFP_KERNEL);
4214 hba[i]->cmd_pool = (CommandList_struct *)
4215 pci_alloc_consistent(hba[i]->pdev,
4216 hba[i]->nr_cmds * sizeof(CommandList_struct),
4217 &(hba[i]->cmd_pool_dhandle));
4218 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4219 pci_alloc_consistent(hba[i]->pdev,
4220 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4221 &(hba[i]->errinfo_pool_dhandle));
4222 if ((hba[i]->cmd_pool_bits == NULL)
4223 || (hba[i]->cmd_pool == NULL)
4224 || (hba[i]->errinfo_pool == NULL)) {
4225 printk(KERN_ERR "cciss: out of memory");
4226 goto clean4;
4227 }
4228
4229 /* Need space for temp scatter list */
4230 hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
4231 sizeof(struct scatterlist *),
4232 GFP_KERNEL);
4233 for (k = 0; k < hba[i]->nr_cmds; k++) {
4234 hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
4235 hba[i]->maxsgentries,
4236 GFP_KERNEL);
4237 if (hba[i]->scatter_list[k] == NULL) {
4238 printk(KERN_ERR "cciss%d: could not allocate "
4239 "s/g lists\n", i);
4240 goto clean4;
4241 }
4242 }
4243 hba[i]->cmd_sg_list = kmalloc(sizeof(struct Cmd_sg_list *) *
4244 hba[i]->nr_cmds,
4245 GFP_KERNEL);
4246 if (!hba[i]->cmd_sg_list) {
4247 printk(KERN_ERR "cciss%d: Cannot get memory for "
4248 "s/g chaining.\n", i);
4249 goto clean4;
4250 }
4251 /* Build up chain blocks for each command */
4252 if (hba[i]->chainsize > 0) {
4253 for (j = 0; j < hba[i]->nr_cmds; j++) {
4254 hba[i]->cmd_sg_list[j] =
4255 kmalloc(sizeof(struct Cmd_sg_list),
4256 GFP_KERNEL);
4257 if (!hba[i]->cmd_sg_list[j]) {
4258 printk(KERN_ERR "cciss%d: Cannot get memory "
4259 "for chain block.\n", i);
4260 goto clean4;
4261 }
4262 /* Need a block of chainsized s/g elements. */
4263 hba[i]->cmd_sg_list[j]->sgchain =
4264 kmalloc((hba[i]->chainsize *
4265 sizeof(SGDescriptor_struct)),
4266 GFP_KERNEL);
4267 if (!hba[i]->cmd_sg_list[j]->sgchain) {
4268 printk(KERN_ERR "cciss%d: Cannot get memory "
4269 "for s/g chains\n", i);
4270 goto clean4;
4271 }
4272 }
4273 }
4274
4275 spin_lock_init(&hba[i]->lock);
4276
4277 /* Initialize the pdev driver private data.
4278 have it point to hba[i]. */
4279 pci_set_drvdata(pdev, hba[i]);
4280 /* command and error info recs zeroed out before
4281 they are used */
4282 memset(hba[i]->cmd_pool_bits, 0,
4283 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4284 * sizeof(unsigned long));
4285
4286 hba[i]->num_luns = 0;
4287 hba[i]->highest_lun = -1;
4288 for (j = 0; j < CISS_MAX_LUN; j++) {
4289 hba[i]->drv[j] = NULL;
4290 hba[i]->gendisk[j] = NULL;
4291 }
4292
4293 cciss_scsi_setup(i);
4294
4295 /* Turn the interrupts on so we can service requests */
4296 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4297
4298 /* Get the firmware version */
4299 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4300 if (inq_buff == NULL) {
4301 printk(KERN_ERR "cciss: out of memory\n");
4302 goto clean4;
4303 }
4304
4305 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
4306 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
4307 if (return_code == IO_OK) {
4308 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4309 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4310 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4311 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4312 } else { /* send command failed */
4313 printk(KERN_WARNING "cciss: unable to determine firmware"
4314 " version of controller\n");
4315 }
4316 kfree(inq_buff);
4317
4318 cciss_procinit(i);
4319
4320 hba[i]->cciss_max_sectors = 8192;
4321
4322 rebuild_lun_table(hba[i], 1, 0);
4323 hba[i]->busy_initializing = 0;
4324 return 1;
4325
4326 clean4:
4327 kfree(hba[i]->cmd_pool_bits);
4328 /* Free up sg elements */
4329 for (k = 0; k < hba[i]->nr_cmds; k++)
4330 kfree(hba[i]->scatter_list[k]);
4331 kfree(hba[i]->scatter_list);
4332 /* Only free up extra s/g lists if controller supports them */
4333 if (hba[i]->chainsize > 0) {
4334 for (j = 0; j < hba[i]->nr_cmds; j++) {
4335 if (hba[i]->cmd_sg_list[j]) {
4336 kfree(hba[i]->cmd_sg_list[j]->sgchain);
4337 kfree(hba[i]->cmd_sg_list[j]);
4338 }
4339 }
4340 kfree(hba[i]->cmd_sg_list);
4341 }
4342 if (hba[i]->cmd_pool)
4343 pci_free_consistent(hba[i]->pdev,
4344 hba[i]->nr_cmds * sizeof(CommandList_struct),
4345 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4346 if (hba[i]->errinfo_pool)
4347 pci_free_consistent(hba[i]->pdev,
4348 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4349 hba[i]->errinfo_pool,
4350 hba[i]->errinfo_pool_dhandle);
4351 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
4352 clean2:
4353 unregister_blkdev(hba[i]->major, hba[i]->devname);
4354 clean1:
4355 cciss_destroy_hba_sysfs_entry(hba[i]);
4356 clean0:
4357 pci_release_regions(pdev);
4358 clean_no_release_regions:
4359 hba[i]->busy_initializing = 0;
4360
4361 /*
4362 * Deliberately omit pci_disable_device(): it does something nasty to
4363 * Smart Array controllers that pci_enable_device does not undo
4364 */
4365 pci_set_drvdata(pdev, NULL);
4366 free_hba(i);
4367 return -1;
4368 }
4369
4370 static void cciss_shutdown(struct pci_dev *pdev)
4371 {
4372 ctlr_info_t *h;
4373 char *flush_buf;
4374 int return_code;
4375
4376 h = pci_get_drvdata(pdev);
4377 flush_buf = kzalloc(4, GFP_KERNEL);
4378 if (!flush_buf) {
4379 printk(KERN_WARNING
4380 "cciss:%d cache not flushed, out of memory.\n",
4381 h->ctlr);
4382 return;
4383 }
4384 /* write all data in the battery backed cache to disk */
4385 memset(flush_buf, 0, 4);
4386 return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
4387 4, 0, CTLR_LUNID, TYPE_CMD);
4388 kfree(flush_buf);
4389 if (return_code != IO_OK)
4390 printk(KERN_WARNING "cciss%d: Error flushing cache\n",
4391 h->ctlr);
4392 h->access.set_intr_mask(h, CCISS_INTR_OFF);
4393 free_irq(h->intr[2], h);
4394 }
4395
4396 static void __devexit cciss_remove_one(struct pci_dev *pdev)
4397 {
4398 ctlr_info_t *tmp_ptr;
4399 int i, j;
4400
4401 if (pci_get_drvdata(pdev) == NULL) {
4402 printk(KERN_ERR "cciss: Unable to remove device \n");
4403 return;
4404 }
4405
4406 tmp_ptr = pci_get_drvdata(pdev);
4407 i = tmp_ptr->ctlr;
4408 if (hba[i] == NULL) {
4409 printk(KERN_ERR "cciss: device appears to "
4410 "already be removed \n");
4411 return;
4412 }
4413
4414 mutex_lock(&hba[i]->busy_shutting_down);
4415
4416 remove_from_scan_list(hba[i]);
4417 remove_proc_entry(hba[i]->devname, proc_cciss);
4418 unregister_blkdev(hba[i]->major, hba[i]->devname);
4419
4420 /* remove it from the disk list */
4421 for (j = 0; j < CISS_MAX_LUN; j++) {
4422 struct gendisk *disk = hba[i]->gendisk[j];
4423 if (disk) {
4424 struct request_queue *q = disk->queue;
4425
4426 if (disk->flags & GENHD_FL_UP) {
4427 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
4428 del_gendisk(disk);
4429 }
4430 if (q)
4431 blk_cleanup_queue(q);
4432 }
4433 }
4434
4435 #ifdef CONFIG_CISS_SCSI_TAPE
4436 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
4437 #endif
4438
4439 cciss_shutdown(pdev);
4440
4441 #ifdef CONFIG_PCI_MSI
4442 if (hba[i]->msix_vector)
4443 pci_disable_msix(hba[i]->pdev);
4444 else if (hba[i]->msi_vector)
4445 pci_disable_msi(hba[i]->pdev);
4446 #endif /* CONFIG_PCI_MSI */
4447
4448 iounmap(hba[i]->vaddr);
4449
4450 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
4451 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4452 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
4453 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
4454 kfree(hba[i]->cmd_pool_bits);
4455 /* Free up sg elements */
4456 for (j = 0; j < hba[i]->nr_cmds; j++)
4457 kfree(hba[i]->scatter_list[j]);
4458 kfree(hba[i]->scatter_list);
4459 /* Only free up extra s/g lists if controller supports them */
4460 if (hba[i]->chainsize > 0) {
4461 for (j = 0; j < hba[i]->nr_cmds; j++) {
4462 if (hba[i]->cmd_sg_list[j]) {
4463 kfree(hba[i]->cmd_sg_list[j]->sgchain);
4464 kfree(hba[i]->cmd_sg_list[j]);
4465 }
4466 }
4467 kfree(hba[i]->cmd_sg_list);
4468 }
4469 /*
4470 * Deliberately omit pci_disable_device(): it does something nasty to
4471 * Smart Array controllers that pci_enable_device does not undo
4472 */
4473 pci_release_regions(pdev);
4474 pci_set_drvdata(pdev, NULL);
4475 cciss_destroy_hba_sysfs_entry(hba[i]);
4476 mutex_unlock(&hba[i]->busy_shutting_down);
4477 free_hba(i);
4478 }
4479
4480 static struct pci_driver cciss_pci_driver = {
4481 .name = "cciss",
4482 .probe = cciss_init_one,
4483 .remove = __devexit_p(cciss_remove_one),
4484 .id_table = cciss_pci_device_id, /* id_table */
4485 .shutdown = cciss_shutdown,
4486 };
4487
4488 /*
4489 * This is it. Register the PCI driver information for the cards we control
4490 * the OS will call our registered routines when it finds one of our cards.
4491 */
4492 static int __init cciss_init(void)
4493 {
4494 int err;
4495
4496 /*
4497 * The hardware requires that commands are aligned on a 64-bit
4498 * boundary. Given that we use pci_alloc_consistent() to allocate an
4499 * array of them, the size must be a multiple of 8 bytes.
4500 */
4501 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4502
4503 printk(KERN_INFO DRIVER_NAME "\n");
4504
4505 err = bus_register(&cciss_bus_type);
4506 if (err)
4507 return err;
4508
4509 /* Start the scan thread */
4510 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4511 if (IS_ERR(cciss_scan_thread)) {
4512 err = PTR_ERR(cciss_scan_thread);
4513 goto err_bus_unregister;
4514 }
4515
4516 /* Register for our PCI devices */
4517 err = pci_register_driver(&cciss_pci_driver);
4518 if (err)
4519 goto err_thread_stop;
4520
4521 return err;
4522
4523 err_thread_stop:
4524 kthread_stop(cciss_scan_thread);
4525 err_bus_unregister:
4526 bus_unregister(&cciss_bus_type);
4527
4528 return err;
4529 }
4530
4531 static void __exit cciss_cleanup(void)
4532 {
4533 int i;
4534
4535 pci_unregister_driver(&cciss_pci_driver);
4536 /* double check that all controller entrys have been removed */
4537 for (i = 0; i < MAX_CTLR; i++) {
4538 if (hba[i] != NULL) {
4539 printk(KERN_WARNING "cciss: had to remove"
4540 " controller %d\n", i);
4541 cciss_remove_one(hba[i]->pdev);
4542 }
4543 }
4544 kthread_stop(cciss_scan_thread);
4545 remove_proc_entry("driver/cciss", NULL);
4546 bus_unregister(&cciss_bus_type);
4547 }
4548
4549 static void fail_all_cmds(unsigned long ctlr)
4550 {
4551 /* If we get here, the board is apparently dead. */
4552 ctlr_info_t *h = hba[ctlr];
4553 CommandList_struct *c;
4554 unsigned long flags;
4555
4556 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
4557 h->alive = 0; /* the controller apparently died... */
4558
4559 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4560
4561 pci_disable_device(h->pdev); /* Make sure it is really dead. */
4562
4563 /* move everything off the request queue onto the completed queue */
4564 while (!hlist_empty(&h->reqQ)) {
4565 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4566 removeQ(c);
4567 h->Qdepth--;
4568 addQ(&h->cmpQ, c);
4569 }
4570
4571 /* Now, fail everything on the completed queue with a HW error */
4572 while (!hlist_empty(&h->cmpQ)) {
4573 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4574 removeQ(c);
4575 if (c->cmd_type != CMD_MSG_STALE)
4576 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4577 if (c->cmd_type == CMD_RWREQ) {
4578 complete_command(h, c, 0);
4579 } else if (c->cmd_type == CMD_IOCTL_PEND)
4580 complete(c->waiting);
4581 #ifdef CONFIG_CISS_SCSI_TAPE
4582 else if (c->cmd_type == CMD_SCSI)
4583 complete_scsi_command(c, 0, 0);
4584 #endif
4585 }
4586 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4587 return;
4588 }
4589
4590 module_init(cciss_init);
4591 module_exit(cciss_cleanup);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree