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[SCSI] hpsa: fix firmwart typo
[linux-2.6/next.git] / drivers / scsi / hpsa.c
blob3734f31d08a8d77848b0ca848cb287c738a205bd
1 /*
2 * Disk Array driver for HP Smart Array SAS controllers
3 * Copyright 2000, 2009 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, GOOD TITLE or
12 * NON INFRINGEMENT. See the GNU 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., 675 Mass Ave, Cambridge, MA 02139, USA.
17 *
18 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
19 *
20 */
21
22 #include <linux/module.h>
23 #include <linux/interrupt.h>
24 #include <linux/types.h>
25 #include <linux/pci.h>
26 #include <linux/kernel.h>
27 #include <linux/slab.h>
28 #include <linux/delay.h>
29 #include <linux/fs.h>
30 #include <linux/timer.h>
31 #include <linux/seq_file.h>
32 #include <linux/init.h>
33 #include <linux/spinlock.h>
34 #include <linux/smp_lock.h>
35 #include <linux/compat.h>
36 #include <linux/blktrace_api.h>
37 #include <linux/uaccess.h>
38 #include <linux/io.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/completion.h>
41 #include <linux/moduleparam.h>
42 #include <scsi/scsi.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_tcq.h>
47 #include <linux/cciss_ioctl.h>
48 #include <linux/string.h>
49 #include <linux/bitmap.h>
50 #include <asm/atomic.h>
51 #include <linux/kthread.h>
52 #include "hpsa_cmd.h"
53 #include "hpsa.h"
54
55 /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
56 #define HPSA_DRIVER_VERSION "2.0.1-3"
57 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
58
59 /* How long to wait (in milliseconds) for board to go into simple mode */
60 #define MAX_CONFIG_WAIT 30000
61 #define MAX_IOCTL_CONFIG_WAIT 1000
62
63 /*define how many times we will try a command because of bus resets */
64 #define MAX_CMD_RETRIES 3
65
66 /* Embedded module documentation macros - see modules.h */
67 MODULE_AUTHOR("Hewlett-Packard Company");
68 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
69 HPSA_DRIVER_VERSION);
70 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
71 MODULE_VERSION(HPSA_DRIVER_VERSION);
72 MODULE_LICENSE("GPL");
73
74 static int hpsa_allow_any;
75 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
76 MODULE_PARM_DESC(hpsa_allow_any,
77 "Allow hpsa driver to access unknown HP Smart Array hardware");
78
79 /* define the PCI info for the cards we can control */
80 static const struct pci_device_id hpsa_pci_device_id[] = {
81 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
82 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
83 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
84 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
85 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324a},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324b},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3233},
89 #define PCI_DEVICE_ID_HP_CISSF 0x333f
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x333F},
91 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
92 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
93 {0,}
94 };
95
96 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
97
98 /* board_id = Subsystem Device ID & Vendor ID
99 * product = Marketing Name for the board
100 * access = Address of the struct of function pointers
101 */
102 static struct board_type products[] = {
103 {0x3241103C, "Smart Array P212", &SA5_access},
104 {0x3243103C, "Smart Array P410", &SA5_access},
105 {0x3245103C, "Smart Array P410i", &SA5_access},
106 {0x3247103C, "Smart Array P411", &SA5_access},
107 {0x3249103C, "Smart Array P812", &SA5_access},
108 {0x324a103C, "Smart Array P712m", &SA5_access},
109 {0x324b103C, "Smart Array P711m", &SA5_access},
110 {0x3233103C, "StorageWorks P1210m", &SA5_access},
111 {0x333F103C, "StorageWorks P1210m", &SA5_access},
112 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
113 };
114
115 static int number_of_controllers;
116
117 static irqreturn_t do_hpsa_intr(int irq, void *dev_id);
118 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
119 static void start_io(struct ctlr_info *h);
120
121 #ifdef CONFIG_COMPAT
122 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
123 #endif
124
125 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
126 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
127 static struct CommandList *cmd_alloc(struct ctlr_info *h);
128 static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
129 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
130 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
131 int cmd_type);
132
133 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
134 void (*done)(struct scsi_cmnd *));
135 static void hpsa_scan_start(struct Scsi_Host *);
136 static int hpsa_scan_finished(struct Scsi_Host *sh,
137 unsigned long elapsed_time);
138 static int hpsa_change_queue_depth(struct scsi_device *sdev,
139 int qdepth, int reason);
140
141 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
142 static int hpsa_slave_alloc(struct scsi_device *sdev);
143 static void hpsa_slave_destroy(struct scsi_device *sdev);
144
145 static ssize_t raid_level_show(struct device *dev,
146 struct device_attribute *attr, char *buf);
147 static ssize_t lunid_show(struct device *dev,
148 struct device_attribute *attr, char *buf);
149 static ssize_t unique_id_show(struct device *dev,
150 struct device_attribute *attr, char *buf);
151 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
152 static ssize_t host_store_rescan(struct device *dev,
153 struct device_attribute *attr, const char *buf, size_t count);
154 static int check_for_unit_attention(struct ctlr_info *h,
155 struct CommandList *c);
156 static void check_ioctl_unit_attention(struct ctlr_info *h,
157 struct CommandList *c);
158 /* performant mode helper functions */
159 static void calc_bucket_map(int *bucket, int num_buckets,
160 int nsgs, int *bucket_map);
161 static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
162 static inline u32 next_command(struct ctlr_info *h);
163
164 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
165 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
166 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
167 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
168
169 static struct device_attribute *hpsa_sdev_attrs[] = {
170 &dev_attr_raid_level,
171 &dev_attr_lunid,
172 &dev_attr_unique_id,
173 NULL,
174 };
175
176 static struct device_attribute *hpsa_shost_attrs[] = {
177 &dev_attr_rescan,
178 NULL,
179 };
180
181 static struct scsi_host_template hpsa_driver_template = {
182 .module = THIS_MODULE,
183 .name = "hpsa",
184 .proc_name = "hpsa",
185 .queuecommand = hpsa_scsi_queue_command,
186 .scan_start = hpsa_scan_start,
187 .scan_finished = hpsa_scan_finished,
188 .change_queue_depth = hpsa_change_queue_depth,
189 .this_id = -1,
190 .sg_tablesize = MAXSGENTRIES,
191 .use_clustering = ENABLE_CLUSTERING,
192 .eh_device_reset_handler = hpsa_eh_device_reset_handler,
193 .ioctl = hpsa_ioctl,
194 .slave_alloc = hpsa_slave_alloc,
195 .slave_destroy = hpsa_slave_destroy,
196 #ifdef CONFIG_COMPAT
197 .compat_ioctl = hpsa_compat_ioctl,
198 #endif
199 .sdev_attrs = hpsa_sdev_attrs,
200 .shost_attrs = hpsa_shost_attrs,
201 };
202
203 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
204 {
205 unsigned long *priv = shost_priv(sdev->host);
206 return (struct ctlr_info *) *priv;
207 }
208
209 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
210 {
211 unsigned long *priv = shost_priv(sh);
212 return (struct ctlr_info *) *priv;
213 }
214
215 static struct task_struct *hpsa_scan_thread;
216 static DEFINE_MUTEX(hpsa_scan_mutex);
217 static LIST_HEAD(hpsa_scan_q);
218 static int hpsa_scan_func(void *data);
219
220 /**
221 * add_to_scan_list() - add controller to rescan queue
222 * @h: Pointer to the controller.
223 *
224 * Adds the controller to the rescan queue if not already on the queue.
225 *
226 * returns 1 if added to the queue, 0 if skipped (could be on the
227 * queue already, or the controller could be initializing or shutting
228 * down).
229 **/
230 static int add_to_scan_list(struct ctlr_info *h)
231 {
232 struct ctlr_info *test_h;
233 int found = 0;
234 int ret = 0;
235
236 if (h->busy_initializing)
237 return 0;
238
239 /*
240 * If we don't get the lock, it means the driver is unloading
241 * and there's no point in scheduling a new scan.
242 */
243 if (!mutex_trylock(&h->busy_shutting_down))
244 return 0;
245
246 mutex_lock(&hpsa_scan_mutex);
247 list_for_each_entry(test_h, &hpsa_scan_q, scan_list) {
248 if (test_h == h) {
249 found = 1;
250 break;
251 }
252 }
253 if (!found && !h->busy_scanning) {
254 INIT_COMPLETION(h->scan_wait);
255 list_add_tail(&h->scan_list, &hpsa_scan_q);
256 ret = 1;
257 }
258 mutex_unlock(&hpsa_scan_mutex);
259 mutex_unlock(&h->busy_shutting_down);
260
261 return ret;
262 }
263
264 /**
265 * remove_from_scan_list() - remove controller from rescan queue
266 * @h: Pointer to the controller.
267 *
268 * Removes the controller from the rescan queue if present. Blocks if
269 * the controller is currently conducting a rescan. The controller
270 * can be in one of three states:
271 * 1. Doesn't need a scan
272 * 2. On the scan list, but not scanning yet (we remove it)
273 * 3. Busy scanning (and not on the list). In this case we want to wait for
274 * the scan to complete to make sure the scanning thread for this
275 * controller is completely idle.
276 **/
277 static void remove_from_scan_list(struct ctlr_info *h)
278 {
279 struct ctlr_info *test_h, *tmp_h;
280
281 mutex_lock(&hpsa_scan_mutex);
282 list_for_each_entry_safe(test_h, tmp_h, &hpsa_scan_q, scan_list) {
283 if (test_h == h) { /* state 2. */
284 list_del(&h->scan_list);
285 complete_all(&h->scan_wait);
286 mutex_unlock(&hpsa_scan_mutex);
287 return;
288 }
289 }
290 if (h->busy_scanning) { /* state 3. */
291 mutex_unlock(&hpsa_scan_mutex);
292 wait_for_completion(&h->scan_wait);
293 } else { /* state 1, nothing to do. */
294 mutex_unlock(&hpsa_scan_mutex);
295 }
296 }
297
298 /* hpsa_scan_func() - kernel thread used to rescan controllers
299 * @data: Ignored.
300 *
301 * A kernel thread used scan for drive topology changes on
302 * controllers. The thread processes only one controller at a time
303 * using a queue. Controllers are added to the queue using
304 * add_to_scan_list() and removed from the queue either after done
305 * processing or using remove_from_scan_list().
306 *
307 * returns 0.
308 **/
309 static int hpsa_scan_func(__attribute__((unused)) void *data)
310 {
311 struct ctlr_info *h;
312 int host_no;
313
314 while (1) {
315 set_current_state(TASK_INTERRUPTIBLE);
316 schedule();
317 if (kthread_should_stop())
318 break;
319
320 while (1) {
321 mutex_lock(&hpsa_scan_mutex);
322 if (list_empty(&hpsa_scan_q)) {
323 mutex_unlock(&hpsa_scan_mutex);
324 break;
325 }
326 h = list_entry(hpsa_scan_q.next, struct ctlr_info,
327 scan_list);
328 list_del(&h->scan_list);
329 h->busy_scanning = 1;
330 mutex_unlock(&hpsa_scan_mutex);
331 host_no = h->scsi_host ? h->scsi_host->host_no : -1;
332 hpsa_scan_start(h->scsi_host);
333 complete_all(&h->scan_wait);
334 mutex_lock(&hpsa_scan_mutex);
335 h->busy_scanning = 0;
336 mutex_unlock(&hpsa_scan_mutex);
337 }
338 }
339 return 0;
340 }
341
342 static int check_for_unit_attention(struct ctlr_info *h,
343 struct CommandList *c)
344 {
345 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
346 return 0;
347
348 switch (c->err_info->SenseInfo[12]) {
349 case STATE_CHANGED:
350 dev_warn(&h->pdev->dev, "hpsa%d: a state change "
351 "detected, command retried\n", h->ctlr);
352 break;
353 case LUN_FAILED:
354 dev_warn(&h->pdev->dev, "hpsa%d: LUN failure "
355 "detected, action required\n", h->ctlr);
356 break;
357 case REPORT_LUNS_CHANGED:
358 dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
359 "changed\n", h->ctlr);
360 /*
361 * Here, we could call add_to_scan_list and wake up the scan thread,
362 * except that it's quite likely that we will get more than one
363 * REPORT_LUNS_CHANGED condition in quick succession, which means
364 * that those which occur after the first one will likely happen
365 * *during* the hpsa_scan_thread's rescan. And the rescan code is not
366 * robust enough to restart in the middle, undoing what it has already
367 * done, and it's not clear that it's even possible to do this, since
368 * part of what it does is notify the SCSI mid layer, which starts
369 * doing it's own i/o to read partition tables and so on, and the
370 * driver doesn't have visibility to know what might need undoing.
371 * In any event, if possible, it is horribly complicated to get right
372 * so we just don't do it for now.
373 *
374 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
375 */
376 break;
377 case POWER_OR_RESET:
378 dev_warn(&h->pdev->dev, "hpsa%d: a power on "
379 "or device reset detected\n", h->ctlr);
380 break;
381 case UNIT_ATTENTION_CLEARED:
382 dev_warn(&h->pdev->dev, "hpsa%d: unit attention "
383 "cleared by another initiator\n", h->ctlr);
384 break;
385 default:
386 dev_warn(&h->pdev->dev, "hpsa%d: unknown "
387 "unit attention detected\n", h->ctlr);
388 break;
389 }
390 return 1;
391 }
392
393 static ssize_t host_store_rescan(struct device *dev,
394 struct device_attribute *attr,
395 const char *buf, size_t count)
396 {
397 struct ctlr_info *h;
398 struct Scsi_Host *shost = class_to_shost(dev);
399 h = shost_to_hba(shost);
400 if (add_to_scan_list(h)) {
401 wake_up_process(hpsa_scan_thread);
402 wait_for_completion_interruptible(&h->scan_wait);
403 }
404 return count;
405 }
406
407 /* Enqueuing and dequeuing functions for cmdlists. */
408 static inline void addQ(struct hlist_head *list, struct CommandList *c)
409 {
410 hlist_add_head(&c->list, list);
411 }
412
413 static inline u32 next_command(struct ctlr_info *h)
414 {
415 u32 a;
416
417 if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
418 return h->access.command_completed(h);
419
420 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
421 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
422 (h->reply_pool_head)++;
423 h->commands_outstanding--;
424 } else {
425 a = FIFO_EMPTY;
426 }
427 /* Check for wraparound */
428 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
429 h->reply_pool_head = h->reply_pool;
430 h->reply_pool_wraparound ^= 1;
431 }
432 return a;
433 }
434
435 /* set_performant_mode: Modify the tag for cciss performant
436 * set bit 0 for pull model, bits 3-1 for block fetch
437 * register number
438 */
439 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
440 {
441 if (likely(h->transMethod == CFGTBL_Trans_Performant))
442 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
443 }
444
445 static void enqueue_cmd_and_start_io(struct ctlr_info *h,
446 struct CommandList *c)
447 {
448 unsigned long flags;
449
450 set_performant_mode(h, c);
451 spin_lock_irqsave(&h->lock, flags);
452 addQ(&h->reqQ, c);
453 h->Qdepth++;
454 start_io(h);
455 spin_unlock_irqrestore(&h->lock, flags);
456 }
457
458 static inline void removeQ(struct CommandList *c)
459 {
460 if (WARN_ON(hlist_unhashed(&c->list)))
461 return;
462 hlist_del_init(&c->list);
463 }
464
465 static inline int is_hba_lunid(unsigned char scsi3addr[])
466 {
467 return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
468 }
469
470 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
471 {
472 return (scsi3addr[3] & 0xC0) == 0x40;
473 }
474
475 static inline int is_scsi_rev_5(struct ctlr_info *h)
476 {
477 if (!h->hba_inquiry_data)
478 return 0;
479 if ((h->hba_inquiry_data[2] & 0x07) == 5)
480 return 1;
481 return 0;
482 }
483
484 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
485 "UNKNOWN"
486 };
487 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
488
489 static ssize_t raid_level_show(struct device *dev,
490 struct device_attribute *attr, char *buf)
491 {
492 ssize_t l = 0;
493 unsigned char rlevel;
494 struct ctlr_info *h;
495 struct scsi_device *sdev;
496 struct hpsa_scsi_dev_t *hdev;
497 unsigned long flags;
498
499 sdev = to_scsi_device(dev);
500 h = sdev_to_hba(sdev);
501 spin_lock_irqsave(&h->lock, flags);
502 hdev = sdev->hostdata;
503 if (!hdev) {
504 spin_unlock_irqrestore(&h->lock, flags);
505 return -ENODEV;
506 }
507
508 /* Is this even a logical drive? */
509 if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
510 spin_unlock_irqrestore(&h->lock, flags);
511 l = snprintf(buf, PAGE_SIZE, "N/A\n");
512 return l;
513 }
514
515 rlevel = hdev->raid_level;
516 spin_unlock_irqrestore(&h->lock, flags);
517 if (rlevel > RAID_UNKNOWN)
518 rlevel = RAID_UNKNOWN;
519 l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
520 return l;
521 }
522
523 static ssize_t lunid_show(struct device *dev,
524 struct device_attribute *attr, char *buf)
525 {
526 struct ctlr_info *h;
527 struct scsi_device *sdev;
528 struct hpsa_scsi_dev_t *hdev;
529 unsigned long flags;
530 unsigned char lunid[8];
531
532 sdev = to_scsi_device(dev);
533 h = sdev_to_hba(sdev);
534 spin_lock_irqsave(&h->lock, flags);
535 hdev = sdev->hostdata;
536 if (!hdev) {
537 spin_unlock_irqrestore(&h->lock, flags);
538 return -ENODEV;
539 }
540 memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
541 spin_unlock_irqrestore(&h->lock, flags);
542 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
543 lunid[0], lunid[1], lunid[2], lunid[3],
544 lunid[4], lunid[5], lunid[6], lunid[7]);
545 }
546
547 static ssize_t unique_id_show(struct device *dev,
548 struct device_attribute *attr, char *buf)
549 {
550 struct ctlr_info *h;
551 struct scsi_device *sdev;
552 struct hpsa_scsi_dev_t *hdev;
553 unsigned long flags;
554 unsigned char sn[16];
555
556 sdev = to_scsi_device(dev);
557 h = sdev_to_hba(sdev);
558 spin_lock_irqsave(&h->lock, flags);
559 hdev = sdev->hostdata;
560 if (!hdev) {
561 spin_unlock_irqrestore(&h->lock, flags);
562 return -ENODEV;
563 }
564 memcpy(sn, hdev->device_id, sizeof(sn));
565 spin_unlock_irqrestore(&h->lock, flags);
566 return snprintf(buf, 16 * 2 + 2,
567 "%02X%02X%02X%02X%02X%02X%02X%02X"
568 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
569 sn[0], sn[1], sn[2], sn[3],
570 sn[4], sn[5], sn[6], sn[7],
571 sn[8], sn[9], sn[10], sn[11],
572 sn[12], sn[13], sn[14], sn[15]);
573 }
574
575 static int hpsa_find_target_lun(struct ctlr_info *h,
576 unsigned char scsi3addr[], int bus, int *target, int *lun)
577 {
578 /* finds an unused bus, target, lun for a new physical device
579 * assumes h->devlock is held
580 */
581 int i, found = 0;
582 DECLARE_BITMAP(lun_taken, HPSA_MAX_SCSI_DEVS_PER_HBA);
583
584 memset(&lun_taken[0], 0, HPSA_MAX_SCSI_DEVS_PER_HBA >> 3);
585
586 for (i = 0; i < h->ndevices; i++) {
587 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
588 set_bit(h->dev[i]->target, lun_taken);
589 }
590
591 for (i = 0; i < HPSA_MAX_SCSI_DEVS_PER_HBA; i++) {
592 if (!test_bit(i, lun_taken)) {
593 /* *bus = 1; */
594 *target = i;
595 *lun = 0;
596 found = 1;
597 break;
598 }
599 }
600 return !found;
601 }
602
603 /* Add an entry into h->dev[] array. */
604 static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
605 struct hpsa_scsi_dev_t *device,
606 struct hpsa_scsi_dev_t *added[], int *nadded)
607 {
608 /* assumes h->devlock is held */
609 int n = h->ndevices;
610 int i;
611 unsigned char addr1[8], addr2[8];
612 struct hpsa_scsi_dev_t *sd;
613
614 if (n >= HPSA_MAX_SCSI_DEVS_PER_HBA) {
615 dev_err(&h->pdev->dev, "too many devices, some will be "
616 "inaccessible.\n");
617 return -1;
618 }
619
620 /* physical devices do not have lun or target assigned until now. */
621 if (device->lun != -1)
622 /* Logical device, lun is already assigned. */
623 goto lun_assigned;
624
625 /* If this device a non-zero lun of a multi-lun device
626 * byte 4 of the 8-byte LUN addr will contain the logical
627 * unit no, zero otherise.
628 */
629 if (device->scsi3addr[4] == 0) {
630 /* This is not a non-zero lun of a multi-lun device */
631 if (hpsa_find_target_lun(h, device->scsi3addr,
632 device->bus, &device->target, &device->lun) != 0)
633 return -1;
634 goto lun_assigned;
635 }
636
637 /* This is a non-zero lun of a multi-lun device.
638 * Search through our list and find the device which
639 * has the same 8 byte LUN address, excepting byte 4.
640 * Assign the same bus and target for this new LUN.
641 * Use the logical unit number from the firmware.
642 */
643 memcpy(addr1, device->scsi3addr, 8);
644 addr1[4] = 0;
645 for (i = 0; i < n; i++) {
646 sd = h->dev[i];
647 memcpy(addr2, sd->scsi3addr, 8);
648 addr2[4] = 0;
649 /* differ only in byte 4? */
650 if (memcmp(addr1, addr2, 8) == 0) {
651 device->bus = sd->bus;
652 device->target = sd->target;
653 device->lun = device->scsi3addr[4];
654 break;
655 }
656 }
657 if (device->lun == -1) {
658 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
659 " suspect firmware bug or unsupported hardware "
660 "configuration.\n");
661 return -1;
662 }
663
664 lun_assigned:
665
666 h->dev[n] = device;
667 h->ndevices++;
668 added[*nadded] = device;
669 (*nadded)++;
670
671 /* initially, (before registering with scsi layer) we don't
672 * know our hostno and we don't want to print anything first
673 * time anyway (the scsi layer's inquiries will show that info)
674 */
675 /* if (hostno != -1) */
676 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
677 scsi_device_type(device->devtype), hostno,
678 device->bus, device->target, device->lun);
679 return 0;
680 }
681
682 /* Replace an entry from h->dev[] array. */
683 static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
684 int entry, struct hpsa_scsi_dev_t *new_entry,
685 struct hpsa_scsi_dev_t *added[], int *nadded,
686 struct hpsa_scsi_dev_t *removed[], int *nremoved)
687 {
688 /* assumes h->devlock is held */
689 BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
690 removed[*nremoved] = h->dev[entry];
691 (*nremoved)++;
692 h->dev[entry] = new_entry;
693 added[*nadded] = new_entry;
694 (*nadded)++;
695 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
696 scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
697 new_entry->target, new_entry->lun);
698 }
699
700 /* Remove an entry from h->dev[] array. */
701 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
702 struct hpsa_scsi_dev_t *removed[], int *nremoved)
703 {
704 /* assumes h->devlock is held */
705 int i;
706 struct hpsa_scsi_dev_t *sd;
707
708 BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
709
710 sd = h->dev[entry];
711 removed[*nremoved] = h->dev[entry];
712 (*nremoved)++;
713
714 for (i = entry; i < h->ndevices-1; i++)
715 h->dev[i] = h->dev[i+1];
716 h->ndevices--;
717 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
718 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
719 sd->lun);
720 }
721
722 #define SCSI3ADDR_EQ(a, b) ( \
723 (a)[7] == (b)[7] && \
724 (a)[6] == (b)[6] && \
725 (a)[5] == (b)[5] && \
726 (a)[4] == (b)[4] && \
727 (a)[3] == (b)[3] && \
728 (a)[2] == (b)[2] && \
729 (a)[1] == (b)[1] && \
730 (a)[0] == (b)[0])
731
732 static void fixup_botched_add(struct ctlr_info *h,
733 struct hpsa_scsi_dev_t *added)
734 {
735 /* called when scsi_add_device fails in order to re-adjust
736 * h->dev[] to match the mid layer's view.
737 */
738 unsigned long flags;
739 int i, j;
740
741 spin_lock_irqsave(&h->lock, flags);
742 for (i = 0; i < h->ndevices; i++) {
743 if (h->dev[i] == added) {
744 for (j = i; j < h->ndevices-1; j++)
745 h->dev[j] = h->dev[j+1];
746 h->ndevices--;
747 break;
748 }
749 }
750 spin_unlock_irqrestore(&h->lock, flags);
751 kfree(added);
752 }
753
754 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
755 struct hpsa_scsi_dev_t *dev2)
756 {
757 if ((is_logical_dev_addr_mode(dev1->scsi3addr) ||
758 (dev1->lun != -1 && dev2->lun != -1)) &&
759 dev1->devtype != 0x0C)
760 return (memcmp(dev1, dev2, sizeof(*dev1)) == 0);
761
762 /* we compare everything except lun and target as these
763 * are not yet assigned. Compare parts likely
764 * to differ first
765 */
766 if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
767 sizeof(dev1->scsi3addr)) != 0)
768 return 0;
769 if (memcmp(dev1->device_id, dev2->device_id,
770 sizeof(dev1->device_id)) != 0)
771 return 0;
772 if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
773 return 0;
774 if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
775 return 0;
776 if (memcmp(dev1->revision, dev2->revision, sizeof(dev1->revision)) != 0)
777 return 0;
778 if (dev1->devtype != dev2->devtype)
779 return 0;
780 if (dev1->raid_level != dev2->raid_level)
781 return 0;
782 if (dev1->bus != dev2->bus)
783 return 0;
784 return 1;
785 }
786
787 /* Find needle in haystack. If exact match found, return DEVICE_SAME,
788 * and return needle location in *index. If scsi3addr matches, but not
789 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
790 * location in *index. If needle not found, return DEVICE_NOT_FOUND.
791 */
792 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
793 struct hpsa_scsi_dev_t *haystack[], int haystack_size,
794 int *index)
795 {
796 int i;
797 #define DEVICE_NOT_FOUND 0
798 #define DEVICE_CHANGED 1
799 #define DEVICE_SAME 2
800 for (i = 0; i < haystack_size; i++) {
801 if (haystack[i] == NULL) /* previously removed. */
802 continue;
803 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
804 *index = i;
805 if (device_is_the_same(needle, haystack[i]))
806 return DEVICE_SAME;
807 else
808 return DEVICE_CHANGED;
809 }
810 }
811 *index = -1;
812 return DEVICE_NOT_FOUND;
813 }
814
815 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
816 struct hpsa_scsi_dev_t *sd[], int nsds)
817 {
818 /* sd contains scsi3 addresses and devtypes, and inquiry
819 * data. This function takes what's in sd to be the current
820 * reality and updates h->dev[] to reflect that reality.
821 */
822 int i, entry, device_change, changes = 0;
823 struct hpsa_scsi_dev_t *csd;
824 unsigned long flags;
825 struct hpsa_scsi_dev_t **added, **removed;
826 int nadded, nremoved;
827 struct Scsi_Host *sh = NULL;
828
829 added = kzalloc(sizeof(*added) * HPSA_MAX_SCSI_DEVS_PER_HBA,
830 GFP_KERNEL);
831 removed = kzalloc(sizeof(*removed) * HPSA_MAX_SCSI_DEVS_PER_HBA,
832 GFP_KERNEL);
833
834 if (!added || !removed) {
835 dev_warn(&h->pdev->dev, "out of memory in "
836 "adjust_hpsa_scsi_table\n");
837 goto free_and_out;
838 }
839
840 spin_lock_irqsave(&h->devlock, flags);
841
842 /* find any devices in h->dev[] that are not in
843 * sd[] and remove them from h->dev[], and for any
844 * devices which have changed, remove the old device
845 * info and add the new device info.
846 */
847 i = 0;
848 nremoved = 0;
849 nadded = 0;
850 while (i < h->ndevices) {
851 csd = h->dev[i];
852 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
853 if (device_change == DEVICE_NOT_FOUND) {
854 changes++;
855 hpsa_scsi_remove_entry(h, hostno, i,
856 removed, &nremoved);
857 continue; /* remove ^^^, hence i not incremented */
858 } else if (device_change == DEVICE_CHANGED) {
859 changes++;
860 hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
861 added, &nadded, removed, &nremoved);
862 /* Set it to NULL to prevent it from being freed
863 * at the bottom of hpsa_update_scsi_devices()
864 */
865 sd[entry] = NULL;
866 }
867 i++;
868 }
869
870 /* Now, make sure every device listed in sd[] is also
871 * listed in h->dev[], adding them if they aren't found
872 */
873
874 for (i = 0; i < nsds; i++) {
875 if (!sd[i]) /* if already added above. */
876 continue;
877 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
878 h->ndevices, &entry);
879 if (device_change == DEVICE_NOT_FOUND) {
880 changes++;
881 if (hpsa_scsi_add_entry(h, hostno, sd[i],
882 added, &nadded) != 0)
883 break;
884 sd[i] = NULL; /* prevent from being freed later. */
885 } else if (device_change == DEVICE_CHANGED) {
886 /* should never happen... */
887 changes++;
888 dev_warn(&h->pdev->dev,
889 "device unexpectedly changed.\n");
890 /* but if it does happen, we just ignore that device */
891 }
892 }
893 spin_unlock_irqrestore(&h->devlock, flags);
894
895 /* Don't notify scsi mid layer of any changes the first time through
896 * (or if there are no changes) scsi_scan_host will do it later the
897 * first time through.
898 */
899 if (hostno == -1 || !changes)
900 goto free_and_out;
901
902 sh = h->scsi_host;
903 /* Notify scsi mid layer of any removed devices */
904 for (i = 0; i < nremoved; i++) {
905 struct scsi_device *sdev =
906 scsi_device_lookup(sh, removed[i]->bus,
907 removed[i]->target, removed[i]->lun);
908 if (sdev != NULL) {
909 scsi_remove_device(sdev);
910 scsi_device_put(sdev);
911 } else {
912 /* We don't expect to get here.
913 * future cmds to this device will get selection
914 * timeout as if the device was gone.
915 */
916 dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
917 " for removal.", hostno, removed[i]->bus,
918 removed[i]->target, removed[i]->lun);
919 }
920 kfree(removed[i]);
921 removed[i] = NULL;
922 }
923
924 /* Notify scsi mid layer of any added devices */
925 for (i = 0; i < nadded; i++) {
926 if (scsi_add_device(sh, added[i]->bus,
927 added[i]->target, added[i]->lun) == 0)
928 continue;
929 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
930 "device not added.\n", hostno, added[i]->bus,
931 added[i]->target, added[i]->lun);
932 /* now we have to remove it from h->dev,
933 * since it didn't get added to scsi mid layer
934 */
935 fixup_botched_add(h, added[i]);
936 }
937
938 free_and_out:
939 kfree(added);
940 kfree(removed);
941 }
942
943 /*
944 * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
945 * Assume's h->devlock is held.
946 */
947 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
948 int bus, int target, int lun)
949 {
950 int i;
951 struct hpsa_scsi_dev_t *sd;
952
953 for (i = 0; i < h->ndevices; i++) {
954 sd = h->dev[i];
955 if (sd->bus == bus && sd->target == target && sd->lun == lun)
956 return sd;
957 }
958 return NULL;
959 }
960
961 /* link sdev->hostdata to our per-device structure. */
962 static int hpsa_slave_alloc(struct scsi_device *sdev)
963 {
964 struct hpsa_scsi_dev_t *sd;
965 unsigned long flags;
966 struct ctlr_info *h;
967
968 h = sdev_to_hba(sdev);
969 spin_lock_irqsave(&h->devlock, flags);
970 sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
971 sdev_id(sdev), sdev->lun);
972 if (sd != NULL)
973 sdev->hostdata = sd;
974 spin_unlock_irqrestore(&h->devlock, flags);
975 return 0;
976 }
977
978 static void hpsa_slave_destroy(struct scsi_device *sdev)
979 {
980 /* nothing to do. */
981 }
982
983 static void hpsa_scsi_setup(struct ctlr_info *h)
984 {
985 h->ndevices = 0;
986 h->scsi_host = NULL;
987 spin_lock_init(&h->devlock);
988 }
989
990 static void complete_scsi_command(struct CommandList *cp,
991 int timeout, u32 tag)
992 {
993 struct scsi_cmnd *cmd;
994 struct ctlr_info *h;
995 struct ErrorInfo *ei;
996
997 unsigned char sense_key;
998 unsigned char asc; /* additional sense code */
999 unsigned char ascq; /* additional sense code qualifier */
1000
1001 ei = cp->err_info;
1002 cmd = (struct scsi_cmnd *) cp->scsi_cmd;
1003 h = cp->h;
1004
1005 scsi_dma_unmap(cmd); /* undo the DMA mappings */
1006
1007 cmd->result = (DID_OK << 16); /* host byte */
1008 cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
1009 cmd->result |= (ei->ScsiStatus << 1);
1010
1011 /* copy the sense data whether we need to or not. */
1012 memcpy(cmd->sense_buffer, ei->SenseInfo,
1013 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
1014 SCSI_SENSE_BUFFERSIZE :
1015 ei->SenseLen);
1016 scsi_set_resid(cmd, ei->ResidualCnt);
1017
1018 if (ei->CommandStatus == 0) {
1019 cmd->scsi_done(cmd);
1020 cmd_free(h, cp);
1021 return;
1022 }
1023
1024 /* an error has occurred */
1025 switch (ei->CommandStatus) {
1026
1027 case CMD_TARGET_STATUS:
1028 if (ei->ScsiStatus) {
1029 /* Get sense key */
1030 sense_key = 0xf & ei->SenseInfo[2];
1031 /* Get additional sense code */
1032 asc = ei->SenseInfo[12];
1033 /* Get addition sense code qualifier */
1034 ascq = ei->SenseInfo[13];
1035 }
1036
1037 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1038 if (check_for_unit_attention(h, cp)) {
1039 cmd->result = DID_SOFT_ERROR << 16;
1040 break;
1041 }
1042 if (sense_key == ILLEGAL_REQUEST) {
1043 /*
1044 * SCSI REPORT_LUNS is commonly unsupported on
1045 * Smart Array. Suppress noisy complaint.
1046 */
1047 if (cp->Request.CDB[0] == REPORT_LUNS)
1048 break;
1049
1050 /* If ASC/ASCQ indicate Logical Unit
1051 * Not Supported condition,
1052 */
1053 if ((asc == 0x25) && (ascq == 0x0)) {
1054 dev_warn(&h->pdev->dev, "cp %p "
1055 "has check condition\n", cp);
1056 break;
1057 }
1058 }
1059
1060 if (sense_key == NOT_READY) {
1061 /* If Sense is Not Ready, Logical Unit
1062 * Not ready, Manual Intervention
1063 * required
1064 */
1065 if ((asc == 0x04) && (ascq == 0x03)) {
1066 dev_warn(&h->pdev->dev, "cp %p "
1067 "has check condition: unit "
1068 "not ready, manual "
1069 "intervention required\n", cp);
1070 break;
1071 }
1072 }
1073 if (sense_key == ABORTED_COMMAND) {
1074 /* Aborted command is retryable */
1075 dev_warn(&h->pdev->dev, "cp %p "
1076 "has check condition: aborted command: "
1077 "ASC: 0x%x, ASCQ: 0x%x\n",
1078 cp, asc, ascq);
1079 cmd->result = DID_SOFT_ERROR << 16;
1080 break;
1081 }
1082 /* Must be some other type of check condition */
1083 dev_warn(&h->pdev->dev, "cp %p has check condition: "
1084 "unknown type: "
1085 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1086 "Returning result: 0x%x, "
1087 "cmd=[%02x %02x %02x %02x %02x "
1088 "%02x %02x %02x %02x %02x %02x "
1089 "%02x %02x %02x %02x %02x]\n",
1090 cp, sense_key, asc, ascq,
1091 cmd->result,
1092 cmd->cmnd[0], cmd->cmnd[1],
1093 cmd->cmnd[2], cmd->cmnd[3],
1094 cmd->cmnd[4], cmd->cmnd[5],
1095 cmd->cmnd[6], cmd->cmnd[7],
1096 cmd->cmnd[8], cmd->cmnd[9],
1097 cmd->cmnd[10], cmd->cmnd[11],
1098 cmd->cmnd[12], cmd->cmnd[13],
1099 cmd->cmnd[14], cmd->cmnd[15]);
1100 break;
1101 }
1102
1103
1104 /* Problem was not a check condition
1105 * Pass it up to the upper layers...
1106 */
1107 if (ei->ScsiStatus) {
1108 dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1109 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1110 "Returning result: 0x%x\n",
1111 cp, ei->ScsiStatus,
1112 sense_key, asc, ascq,
1113 cmd->result);
1114 } else { /* scsi status is zero??? How??? */
1115 dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1116 "Returning no connection.\n", cp),
1117
1118 /* Ordinarily, this case should never happen,
1119 * but there is a bug in some released firmware
1120 * revisions that allows it to happen if, for
1121 * example, a 4100 backplane loses power and
1122 * the tape drive is in it. We assume that
1123 * it's a fatal error of some kind because we
1124 * can't show that it wasn't. We will make it
1125 * look like selection timeout since that is
1126 * the most common reason for this to occur,
1127 * and it's severe enough.
1128 */
1129
1130 cmd->result = DID_NO_CONNECT << 16;
1131 }
1132 break;
1133
1134 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1135 break;
1136 case CMD_DATA_OVERRUN:
1137 dev_warn(&h->pdev->dev, "cp %p has"
1138 " completed with data overrun "
1139 "reported\n", cp);
1140 break;
1141 case CMD_INVALID: {
1142 /* print_bytes(cp, sizeof(*cp), 1, 0);
1143 print_cmd(cp); */
1144 /* We get CMD_INVALID if you address a non-existent device
1145 * instead of a selection timeout (no response). You will
1146 * see this if you yank out a drive, then try to access it.
1147 * This is kind of a shame because it means that any other
1148 * CMD_INVALID (e.g. driver bug) will get interpreted as a
1149 * missing target. */
1150 cmd->result = DID_NO_CONNECT << 16;
1151 }
1152 break;
1153 case CMD_PROTOCOL_ERR:
1154 dev_warn(&h->pdev->dev, "cp %p has "
1155 "protocol error \n", cp);
1156 break;
1157 case CMD_HARDWARE_ERR:
1158 cmd->result = DID_ERROR << 16;
1159 dev_warn(&h->pdev->dev, "cp %p had hardware error\n", cp);
1160 break;
1161 case CMD_CONNECTION_LOST:
1162 cmd->result = DID_ERROR << 16;
1163 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1164 break;
1165 case CMD_ABORTED:
1166 cmd->result = DID_ABORT << 16;
1167 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1168 cp, ei->ScsiStatus);
1169 break;
1170 case CMD_ABORT_FAILED:
1171 cmd->result = DID_ERROR << 16;
1172 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1173 break;
1174 case CMD_UNSOLICITED_ABORT:
1175 cmd->result = DID_RESET << 16;
1176 dev_warn(&h->pdev->dev, "cp %p aborted do to an unsolicited "
1177 "abort\n", cp);
1178 break;
1179 case CMD_TIMEOUT:
1180 cmd->result = DID_TIME_OUT << 16;
1181 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1182 break;
1183 default:
1184 cmd->result = DID_ERROR << 16;
1185 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1186 cp, ei->CommandStatus);
1187 }
1188 cmd->scsi_done(cmd);
1189 cmd_free(h, cp);
1190 }
1191
1192 static int hpsa_scsi_detect(struct ctlr_info *h)
1193 {
1194 struct Scsi_Host *sh;
1195 int error;
1196
1197 sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
1198 if (sh == NULL)
1199 goto fail;
1200
1201 sh->io_port = 0;
1202 sh->n_io_port = 0;
1203 sh->this_id = -1;
1204 sh->max_channel = 3;
1205 sh->max_cmd_len = MAX_COMMAND_SIZE;
1206 sh->max_lun = HPSA_MAX_LUN;
1207 sh->max_id = HPSA_MAX_LUN;
1208 sh->can_queue = h->nr_cmds;
1209 sh->cmd_per_lun = h->nr_cmds;
1210 h->scsi_host = sh;
1211 sh->hostdata[0] = (unsigned long) h;
1212 sh->irq = h->intr[PERF_MODE_INT];
1213 sh->unique_id = sh->irq;
1214 error = scsi_add_host(sh, &h->pdev->dev);
1215 if (error)
1216 goto fail_host_put;
1217 scsi_scan_host(sh);
1218 return 0;
1219
1220 fail_host_put:
1221 dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_add_host"
1222 " failed for controller %d\n", h->ctlr);
1223 scsi_host_put(sh);
1224 return error;
1225 fail:
1226 dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc"
1227 " failed for controller %d\n", h->ctlr);
1228 return -ENOMEM;
1229 }
1230
1231 static void hpsa_pci_unmap(struct pci_dev *pdev,
1232 struct CommandList *c, int sg_used, int data_direction)
1233 {
1234 int i;
1235 union u64bit addr64;
1236
1237 for (i = 0; i < sg_used; i++) {
1238 addr64.val32.lower = c->SG[i].Addr.lower;
1239 addr64.val32.upper = c->SG[i].Addr.upper;
1240 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1241 data_direction);
1242 }
1243 }
1244
1245 static void hpsa_map_one(struct pci_dev *pdev,
1246 struct CommandList *cp,
1247 unsigned char *buf,
1248 size_t buflen,
1249 int data_direction)
1250 {
1251 u64 addr64;
1252
1253 if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1254 cp->Header.SGList = 0;
1255 cp->Header.SGTotal = 0;
1256 return;
1257 }
1258
1259 addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1260 cp->SG[0].Addr.lower =
1261 (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1262 cp->SG[0].Addr.upper =
1263 (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1264 cp->SG[0].Len = buflen;
1265 cp->Header.SGList = (u8) 1; /* no. SGs contig in this cmd */
1266 cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1267 }
1268
1269 static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1270 struct CommandList *c)
1271 {
1272 DECLARE_COMPLETION_ONSTACK(wait);
1273
1274 c->waiting = &wait;
1275 enqueue_cmd_and_start_io(h, c);
1276 wait_for_completion(&wait);
1277 }
1278
1279 static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1280 struct CommandList *c, int data_direction)
1281 {
1282 int retry_count = 0;
1283
1284 do {
1285 memset(c->err_info, 0, sizeof(c->err_info));
1286 hpsa_scsi_do_simple_cmd_core(h, c);
1287 retry_count++;
1288 } while (check_for_unit_attention(h, c) && retry_count <= 3);
1289 hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1290 }
1291
1292 static void hpsa_scsi_interpret_error(struct CommandList *cp)
1293 {
1294 struct ErrorInfo *ei;
1295 struct device *d = &cp->h->pdev->dev;
1296
1297 ei = cp->err_info;
1298 switch (ei->CommandStatus) {
1299 case CMD_TARGET_STATUS:
1300 dev_warn(d, "cmd %p has completed with errors\n", cp);
1301 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1302 ei->ScsiStatus);
1303 if (ei->ScsiStatus == 0)
1304 dev_warn(d, "SCSI status is abnormally zero. "
1305 "(probably indicates selection timeout "
1306 "reported incorrectly due to a known "
1307 "firmware bug, circa July, 2001.)\n");
1308 break;
1309 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1310 dev_info(d, "UNDERRUN\n");
1311 break;
1312 case CMD_DATA_OVERRUN:
1313 dev_warn(d, "cp %p has completed with data overrun\n", cp);
1314 break;
1315 case CMD_INVALID: {
1316 /* controller unfortunately reports SCSI passthru's
1317 * to non-existent targets as invalid commands.
1318 */
1319 dev_warn(d, "cp %p is reported invalid (probably means "
1320 "target device no longer present)\n", cp);
1321 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1322 print_cmd(cp); */
1323 }
1324 break;
1325 case CMD_PROTOCOL_ERR:
1326 dev_warn(d, "cp %p has protocol error \n", cp);
1327 break;
1328 case CMD_HARDWARE_ERR:
1329 /* cmd->result = DID_ERROR << 16; */
1330 dev_warn(d, "cp %p had hardware error\n", cp);
1331 break;
1332 case CMD_CONNECTION_LOST:
1333 dev_warn(d, "cp %p had connection lost\n", cp);
1334 break;
1335 case CMD_ABORTED:
1336 dev_warn(d, "cp %p was aborted\n", cp);
1337 break;
1338 case CMD_ABORT_FAILED:
1339 dev_warn(d, "cp %p reports abort failed\n", cp);
1340 break;
1341 case CMD_UNSOLICITED_ABORT:
1342 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1343 break;
1344 case CMD_TIMEOUT:
1345 dev_warn(d, "cp %p timed out\n", cp);
1346 break;
1347 default:
1348 dev_warn(d, "cp %p returned unknown status %x\n", cp,
1349 ei->CommandStatus);
1350 }
1351 }
1352
1353 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1354 unsigned char page, unsigned char *buf,
1355 unsigned char bufsize)
1356 {
1357 int rc = IO_OK;
1358 struct CommandList *c;
1359 struct ErrorInfo *ei;
1360
1361 c = cmd_special_alloc(h);
1362
1363 if (c == NULL) { /* trouble... */
1364 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1365 return -ENOMEM;
1366 }
1367
1368 fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
1369 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1370 ei = c->err_info;
1371 if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1372 hpsa_scsi_interpret_error(c);
1373 rc = -1;
1374 }
1375 cmd_special_free(h, c);
1376 return rc;
1377 }
1378
1379 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1380 {
1381 int rc = IO_OK;
1382 struct CommandList *c;
1383 struct ErrorInfo *ei;
1384
1385 c = cmd_special_alloc(h);
1386
1387 if (c == NULL) { /* trouble... */
1388 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1389 return -1;
1390 }
1391
1392 fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
1393 hpsa_scsi_do_simple_cmd_core(h, c);
1394 /* no unmap needed here because no data xfer. */
1395
1396 ei = c->err_info;
1397 if (ei->CommandStatus != 0) {
1398 hpsa_scsi_interpret_error(c);
1399 rc = -1;
1400 }
1401 cmd_special_free(h, c);
1402 return rc;
1403 }
1404
1405 static void hpsa_get_raid_level(struct ctlr_info *h,
1406 unsigned char *scsi3addr, unsigned char *raid_level)
1407 {
1408 int rc;
1409 unsigned char *buf;
1410
1411 *raid_level = RAID_UNKNOWN;
1412 buf = kzalloc(64, GFP_KERNEL);
1413 if (!buf)
1414 return;
1415 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1416 if (rc == 0)
1417 *raid_level = buf[8];
1418 if (*raid_level > RAID_UNKNOWN)
1419 *raid_level = RAID_UNKNOWN;
1420 kfree(buf);
1421 return;
1422 }
1423
1424 /* Get the device id from inquiry page 0x83 */
1425 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1426 unsigned char *device_id, int buflen)
1427 {
1428 int rc;
1429 unsigned char *buf;
1430
1431 if (buflen > 16)
1432 buflen = 16;
1433 buf = kzalloc(64, GFP_KERNEL);
1434 if (!buf)
1435 return -1;
1436 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1437 if (rc == 0)
1438 memcpy(device_id, &buf[8], buflen);
1439 kfree(buf);
1440 return rc != 0;
1441 }
1442
1443 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1444 struct ReportLUNdata *buf, int bufsize,
1445 int extended_response)
1446 {
1447 int rc = IO_OK;
1448 struct CommandList *c;
1449 unsigned char scsi3addr[8];
1450 struct ErrorInfo *ei;
1451
1452 c = cmd_special_alloc(h);
1453 if (c == NULL) { /* trouble... */
1454 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1455 return -1;
1456 }
1457 /* address the controller */
1458 memset(scsi3addr, 0, sizeof(scsi3addr));
1459 fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1460 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1461 if (extended_response)
1462 c->Request.CDB[1] = extended_response;
1463 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1464 ei = c->err_info;
1465 if (ei->CommandStatus != 0 &&
1466 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1467 hpsa_scsi_interpret_error(c);
1468 rc = -1;
1469 }
1470 cmd_special_free(h, c);
1471 return rc;
1472 }
1473
1474 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1475 struct ReportLUNdata *buf,
1476 int bufsize, int extended_response)
1477 {
1478 return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1479 }
1480
1481 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1482 struct ReportLUNdata *buf, int bufsize)
1483 {
1484 return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1485 }
1486
1487 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1488 int bus, int target, int lun)
1489 {
1490 device->bus = bus;
1491 device->target = target;
1492 device->lun = lun;
1493 }
1494
1495 static int hpsa_update_device_info(struct ctlr_info *h,
1496 unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device)
1497 {
1498 #define OBDR_TAPE_INQ_SIZE 49
1499 unsigned char *inq_buff;
1500
1501 inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1502 if (!inq_buff)
1503 goto bail_out;
1504
1505 /* Do an inquiry to the device to see what it is. */
1506 if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1507 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1508 /* Inquiry failed (msg printed already) */
1509 dev_err(&h->pdev->dev,
1510 "hpsa_update_device_info: inquiry failed\n");
1511 goto bail_out;
1512 }
1513
1514 /* As a side effect, record the firmware version number
1515 * if we happen to be talking to the RAID controller.
1516 */
1517 if (is_hba_lunid(scsi3addr))
1518 memcpy(h->firm_ver, &inq_buff[32], 4);
1519
1520 this_device->devtype = (inq_buff[0] & 0x1f);
1521 memcpy(this_device->scsi3addr, scsi3addr, 8);
1522 memcpy(this_device->vendor, &inq_buff[8],
1523 sizeof(this_device->vendor));
1524 memcpy(this_device->model, &inq_buff[16],
1525 sizeof(this_device->model));
1526 memcpy(this_device->revision, &inq_buff[32],
1527 sizeof(this_device->revision));
1528 memset(this_device->device_id, 0,
1529 sizeof(this_device->device_id));
1530 hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1531 sizeof(this_device->device_id));
1532
1533 if (this_device->devtype == TYPE_DISK &&
1534 is_logical_dev_addr_mode(scsi3addr))
1535 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1536 else
1537 this_device->raid_level = RAID_UNKNOWN;
1538
1539 kfree(inq_buff);
1540 return 0;
1541
1542 bail_out:
1543 kfree(inq_buff);
1544 return 1;
1545 }
1546
1547 static unsigned char *msa2xxx_model[] = {
1548 "MSA2012",
1549 "MSA2024",
1550 "MSA2312",
1551 "MSA2324",
1552 NULL,
1553 };
1554
1555 static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1556 {
1557 int i;
1558
1559 for (i = 0; msa2xxx_model[i]; i++)
1560 if (strncmp(device->model, msa2xxx_model[i],
1561 strlen(msa2xxx_model[i])) == 0)
1562 return 1;
1563 return 0;
1564 }
1565
1566 /* Helper function to assign bus, target, lun mapping of devices.
1567 * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical
1568 * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1569 * Logical drive target and lun are assigned at this time, but
1570 * physical device lun and target assignment are deferred (assigned
1571 * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1572 */
1573 static void figure_bus_target_lun(struct ctlr_info *h,
1574 u8 *lunaddrbytes, int *bus, int *target, int *lun,
1575 struct hpsa_scsi_dev_t *device)
1576 {
1577 u32 lunid;
1578
1579 if (is_logical_dev_addr_mode(lunaddrbytes)) {
1580 /* logical device */
1581 if (unlikely(is_scsi_rev_5(h))) {
1582 /* p1210m, logical drives lun assignments
1583 * match SCSI REPORT LUNS data.
1584 */
1585 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1586 *bus = 0;
1587 *target = 0;
1588 *lun = (lunid & 0x3fff) + 1;
1589 } else {
1590 /* not p1210m... */
1591 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1592 if (is_msa2xxx(h, device)) {
1593 /* msa2xxx way, put logicals on bus 1
1594 * and match target/lun numbers box
1595 * reports.
1596 */
1597 *bus = 1;
1598 *target = (lunid >> 16) & 0x3fff;
1599 *lun = lunid & 0x00ff;
1600 } else {
1601 /* Traditional smart array way. */
1602 *bus = 0;
1603 *lun = 0;
1604 *target = lunid & 0x3fff;
1605 }
1606 }
1607 } else {
1608 /* physical device */
1609 if (is_hba_lunid(lunaddrbytes))
1610 if (unlikely(is_scsi_rev_5(h))) {
1611 *bus = 0; /* put p1210m ctlr at 0,0,0 */
1612 *target = 0;
1613 *lun = 0;
1614 return;
1615 } else
1616 *bus = 3; /* traditional smartarray */
1617 else
1618 *bus = 2; /* physical disk */
1619 *target = -1;
1620 *lun = -1; /* we will fill these in later. */
1621 }
1622 }
1623
1624 /*
1625 * If there is no lun 0 on a target, linux won't find any devices.
1626 * For the MSA2xxx boxes, we have to manually detect the enclosure
1627 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1628 * it for some reason. *tmpdevice is the target we're adding,
1629 * this_device is a pointer into the current element of currentsd[]
1630 * that we're building up in update_scsi_devices(), below.
1631 * lunzerobits is a bitmap that tracks which targets already have a
1632 * lun 0 assigned.
1633 * Returns 1 if an enclosure was added, 0 if not.
1634 */
1635 static int add_msa2xxx_enclosure_device(struct ctlr_info *h,
1636 struct hpsa_scsi_dev_t *tmpdevice,
1637 struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1638 int bus, int target, int lun, unsigned long lunzerobits[],
1639 int *nmsa2xxx_enclosures)
1640 {
1641 unsigned char scsi3addr[8];
1642
1643 if (test_bit(target, lunzerobits))
1644 return 0; /* There is already a lun 0 on this target. */
1645
1646 if (!is_logical_dev_addr_mode(lunaddrbytes))
1647 return 0; /* It's the logical targets that may lack lun 0. */
1648
1649 if (!is_msa2xxx(h, tmpdevice))
1650 return 0; /* It's only the MSA2xxx that have this problem. */
1651
1652 if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */
1653 return 0;
1654
1655 if (is_hba_lunid(scsi3addr))
1656 return 0; /* Don't add the RAID controller here. */
1657
1658 if (is_scsi_rev_5(h))
1659 return 0; /* p1210m doesn't need to do this. */
1660
1661 #define MAX_MSA2XXX_ENCLOSURES 32
1662 if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) {
1663 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX "
1664 "enclosures exceeded. Check your hardware "
1665 "configuration.");
1666 return 0;
1667 }
1668
1669 memset(scsi3addr, 0, 8);
1670 scsi3addr[3] = target;
1671 if (hpsa_update_device_info(h, scsi3addr, this_device))
1672 return 0;
1673 (*nmsa2xxx_enclosures)++;
1674 hpsa_set_bus_target_lun(this_device, bus, target, 0);
1675 set_bit(target, lunzerobits);
1676 return 1;
1677 }
1678
1679 /*
1680 * Do CISS_REPORT_PHYS and CISS_REPORT_LOG. Data is returned in physdev,
1681 * logdev. The number of luns in physdev and logdev are returned in
1682 * *nphysicals and *nlogicals, respectively.
1683 * Returns 0 on success, -1 otherwise.
1684 */
1685 static int hpsa_gather_lun_info(struct ctlr_info *h,
1686 int reportlunsize,
1687 struct ReportLUNdata *physdev, u32 *nphysicals,
1688 struct ReportLUNdata *logdev, u32 *nlogicals)
1689 {
1690 if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1691 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1692 return -1;
1693 }
1694 *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1695 if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1696 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1697 " %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1698 *nphysicals - HPSA_MAX_PHYS_LUN);
1699 *nphysicals = HPSA_MAX_PHYS_LUN;
1700 }
1701 if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1702 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1703 return -1;
1704 }
1705 *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1706 /* Reject Logicals in excess of our max capability. */
1707 if (*nlogicals > HPSA_MAX_LUN) {
1708 dev_warn(&h->pdev->dev,
1709 "maximum logical LUNs (%d) exceeded. "
1710 "%d LUNs ignored.\n", HPSA_MAX_LUN,
1711 *nlogicals - HPSA_MAX_LUN);
1712 *nlogicals = HPSA_MAX_LUN;
1713 }
1714 if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1715 dev_warn(&h->pdev->dev,
1716 "maximum logical + physical LUNs (%d) exceeded. "
1717 "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1718 *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1719 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1720 }
1721 return 0;
1722 }
1723
1724 u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1725 int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1726 struct ReportLUNdata *logdev_list)
1727 {
1728 /* Helper function, figure out where the LUN ID info is coming from
1729 * given index i, lists of physical and logical devices, where in
1730 * the list the raid controller is supposed to appear (first or last)
1731 */
1732
1733 int logicals_start = nphysicals + (raid_ctlr_position == 0);
1734 int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1735
1736 if (i == raid_ctlr_position)
1737 return RAID_CTLR_LUNID;
1738
1739 if (i < logicals_start)
1740 return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1741
1742 if (i < last_device)
1743 return &logdev_list->LUN[i - nphysicals -
1744 (raid_ctlr_position == 0)][0];
1745 BUG();
1746 return NULL;
1747 }
1748
1749 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1750 {
1751 /* the idea here is we could get notified
1752 * that some devices have changed, so we do a report
1753 * physical luns and report logical luns cmd, and adjust
1754 * our list of devices accordingly.
1755 *
1756 * The scsi3addr's of devices won't change so long as the
1757 * adapter is not reset. That means we can rescan and
1758 * tell which devices we already know about, vs. new
1759 * devices, vs. disappearing devices.
1760 */
1761 struct ReportLUNdata *physdev_list = NULL;
1762 struct ReportLUNdata *logdev_list = NULL;
1763 unsigned char *inq_buff = NULL;
1764 u32 nphysicals = 0;
1765 u32 nlogicals = 0;
1766 u32 ndev_allocated = 0;
1767 struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1768 int ncurrent = 0;
1769 int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1770 int i, nmsa2xxx_enclosures, ndevs_to_allocate;
1771 int bus, target, lun;
1772 int raid_ctlr_position;
1773 DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR);
1774
1775 currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA,
1776 GFP_KERNEL);
1777 physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1778 logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1779 inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1780 tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1781
1782 if (!currentsd || !physdev_list || !logdev_list ||
1783 !inq_buff || !tmpdevice) {
1784 dev_err(&h->pdev->dev, "out of memory\n");
1785 goto out;
1786 }
1787 memset(lunzerobits, 0, sizeof(lunzerobits));
1788
1789 if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1790 logdev_list, &nlogicals))
1791 goto out;
1792
1793 /* We might see up to 32 MSA2xxx enclosures, actually 8 of them
1794 * but each of them 4 times through different paths. The plus 1
1795 * is for the RAID controller.
1796 */
1797 ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1;
1798
1799 /* Allocate the per device structures */
1800 for (i = 0; i < ndevs_to_allocate; i++) {
1801 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1802 if (!currentsd[i]) {
1803 dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1804 __FILE__, __LINE__);
1805 goto out;
1806 }
1807 ndev_allocated++;
1808 }
1809
1810 if (unlikely(is_scsi_rev_5(h)))
1811 raid_ctlr_position = 0;
1812 else
1813 raid_ctlr_position = nphysicals + nlogicals;
1814
1815 /* adjust our table of devices */
1816 nmsa2xxx_enclosures = 0;
1817 for (i = 0; i < nphysicals + nlogicals + 1; i++) {
1818 u8 *lunaddrbytes;
1819
1820 /* Figure out where the LUN ID info is coming from */
1821 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
1822 i, nphysicals, nlogicals, physdev_list, logdev_list);
1823 /* skip masked physical devices. */
1824 if (lunaddrbytes[3] & 0xC0 &&
1825 i < nphysicals + (raid_ctlr_position == 0))
1826 continue;
1827
1828 /* Get device type, vendor, model, device id */
1829 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice))
1830 continue; /* skip it if we can't talk to it. */
1831 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun,
1832 tmpdevice);
1833 this_device = currentsd[ncurrent];
1834
1835 /*
1836 * For the msa2xxx boxes, we have to insert a LUN 0 which
1837 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
1838 * is nonetheless an enclosure device there. We have to
1839 * present that otherwise linux won't find anything if
1840 * there is no lun 0.
1841 */
1842 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device,
1843 lunaddrbytes, bus, target, lun, lunzerobits,
1844 &nmsa2xxx_enclosures)) {
1845 ncurrent++;
1846 this_device = currentsd[ncurrent];
1847 }
1848
1849 *this_device = *tmpdevice;
1850 hpsa_set_bus_target_lun(this_device, bus, target, lun);
1851
1852 switch (this_device->devtype) {
1853 case TYPE_ROM: {
1854 /* We don't *really* support actual CD-ROM devices,
1855 * just "One Button Disaster Recovery" tape drive
1856 * which temporarily pretends to be a CD-ROM drive.
1857 * So we check that the device is really an OBDR tape
1858 * device by checking for "$DR-10" in bytes 43-48 of
1859 * the inquiry data.
1860 */
1861 char obdr_sig[7];
1862 #define OBDR_TAPE_SIG "$DR-10"
1863 strncpy(obdr_sig, &inq_buff[43], 6);
1864 obdr_sig[6] = '\0';
1865 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1866 /* Not OBDR device, ignore it. */
1867 break;
1868 }
1869 ncurrent++;
1870 break;
1871 case TYPE_DISK:
1872 if (i < nphysicals)
1873 break;
1874 ncurrent++;
1875 break;
1876 case TYPE_TAPE:
1877 case TYPE_MEDIUM_CHANGER:
1878 ncurrent++;
1879 break;
1880 case TYPE_RAID:
1881 /* Only present the Smartarray HBA as a RAID controller.
1882 * If it's a RAID controller other than the HBA itself
1883 * (an external RAID controller, MSA500 or similar)
1884 * don't present it.
1885 */
1886 if (!is_hba_lunid(lunaddrbytes))
1887 break;
1888 ncurrent++;
1889 break;
1890 default:
1891 break;
1892 }
1893 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA)
1894 break;
1895 }
1896 adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
1897 out:
1898 kfree(tmpdevice);
1899 for (i = 0; i < ndev_allocated; i++)
1900 kfree(currentsd[i]);
1901 kfree(currentsd);
1902 kfree(inq_buff);
1903 kfree(physdev_list);
1904 kfree(logdev_list);
1905 }
1906
1907 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1908 * dma mapping and fills in the scatter gather entries of the
1909 * hpsa command, cp.
1910 */
1911 static int hpsa_scatter_gather(struct pci_dev *pdev,
1912 struct CommandList *cp,
1913 struct scsi_cmnd *cmd)
1914 {
1915 unsigned int len;
1916 struct scatterlist *sg;
1917 u64 addr64;
1918 int use_sg, i;
1919
1920 BUG_ON(scsi_sg_count(cmd) > MAXSGENTRIES);
1921
1922 use_sg = scsi_dma_map(cmd);
1923 if (use_sg < 0)
1924 return use_sg;
1925
1926 if (!use_sg)
1927 goto sglist_finished;
1928
1929 scsi_for_each_sg(cmd, sg, use_sg, i) {
1930 addr64 = (u64) sg_dma_address(sg);
1931 len = sg_dma_len(sg);
1932 cp->SG[i].Addr.lower =
1933 (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1934 cp->SG[i].Addr.upper =
1935 (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1936 cp->SG[i].Len = len;
1937 cp->SG[i].Ext = 0; /* we are not chaining */
1938 }
1939
1940 sglist_finished:
1941
1942 cp->Header.SGList = (u8) use_sg; /* no. SGs contig in this cmd */
1943 cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
1944 return 0;
1945 }
1946
1947
1948 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
1949 void (*done)(struct scsi_cmnd *))
1950 {
1951 struct ctlr_info *h;
1952 struct hpsa_scsi_dev_t *dev;
1953 unsigned char scsi3addr[8];
1954 struct CommandList *c;
1955 unsigned long flags;
1956
1957 /* Get the ptr to our adapter structure out of cmd->host. */
1958 h = sdev_to_hba(cmd->device);
1959 dev = cmd->device->hostdata;
1960 if (!dev) {
1961 cmd->result = DID_NO_CONNECT << 16;
1962 done(cmd);
1963 return 0;
1964 }
1965 memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
1966
1967 /* Need a lock as this is being allocated from the pool */
1968 spin_lock_irqsave(&h->lock, flags);
1969 c = cmd_alloc(h);
1970 spin_unlock_irqrestore(&h->lock, flags);
1971 if (c == NULL) { /* trouble... */
1972 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
1973 return SCSI_MLQUEUE_HOST_BUSY;
1974 }
1975
1976 /* Fill in the command list header */
1977
1978 cmd->scsi_done = done; /* save this for use by completion code */
1979
1980 /* save c in case we have to abort it */
1981 cmd->host_scribble = (unsigned char *) c;
1982
1983 c->cmd_type = CMD_SCSI;
1984 c->scsi_cmd = cmd;
1985 c->Header.ReplyQueue = 0; /* unused in simple mode */
1986 memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1987 c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
1988 c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
1989
1990 /* Fill in the request block... */
1991
1992 c->Request.Timeout = 0;
1993 memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1994 BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1995 c->Request.CDBLen = cmd->cmd_len;
1996 memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1997 c->Request.Type.Type = TYPE_CMD;
1998 c->Request.Type.Attribute = ATTR_SIMPLE;
1999 switch (cmd->sc_data_direction) {
2000 case DMA_TO_DEVICE:
2001 c->Request.Type.Direction = XFER_WRITE;
2002 break;
2003 case DMA_FROM_DEVICE:
2004 c->Request.Type.Direction = XFER_READ;
2005 break;
2006 case DMA_NONE:
2007 c->Request.Type.Direction = XFER_NONE;
2008 break;
2009 case DMA_BIDIRECTIONAL:
2010 /* This can happen if a buggy application does a scsi passthru
2011 * and sets both inlen and outlen to non-zero. ( see
2012 * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
2013 */
2014
2015 c->Request.Type.Direction = XFER_RSVD;
2016 /* This is technically wrong, and hpsa controllers should
2017 * reject it with CMD_INVALID, which is the most correct
2018 * response, but non-fibre backends appear to let it
2019 * slide by, and give the same results as if this field
2020 * were set correctly. Either way is acceptable for
2021 * our purposes here.
2022 */
2023
2024 break;
2025
2026 default:
2027 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
2028 cmd->sc_data_direction);
2029 BUG();
2030 break;
2031 }
2032
2033 if (hpsa_scatter_gather(h->pdev, c, cmd) < 0) { /* Fill SG list */
2034 cmd_free(h, c);
2035 return SCSI_MLQUEUE_HOST_BUSY;
2036 }
2037 enqueue_cmd_and_start_io(h, c);
2038 /* the cmd'll come back via intr handler in complete_scsi_command() */
2039 return 0;
2040 }
2041
2042 static void hpsa_scan_start(struct Scsi_Host *sh)
2043 {
2044 struct ctlr_info *h = shost_to_hba(sh);
2045 unsigned long flags;
2046
2047 /* wait until any scan already in progress is finished. */
2048 while (1) {
2049 spin_lock_irqsave(&h->scan_lock, flags);
2050 if (h->scan_finished)
2051 break;
2052 spin_unlock_irqrestore(&h->scan_lock, flags);
2053 wait_event(h->scan_wait_queue, h->scan_finished);
2054 /* Note: We don't need to worry about a race between this
2055 * thread and driver unload because the midlayer will
2056 * have incremented the reference count, so unload won't
2057 * happen if we're in here.
2058 */
2059 }
2060 h->scan_finished = 0; /* mark scan as in progress */
2061 spin_unlock_irqrestore(&h->scan_lock, flags);
2062
2063 hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2064
2065 spin_lock_irqsave(&h->scan_lock, flags);
2066 h->scan_finished = 1; /* mark scan as finished. */
2067 wake_up_all(&h->scan_wait_queue);
2068 spin_unlock_irqrestore(&h->scan_lock, flags);
2069 }
2070
2071 static int hpsa_scan_finished(struct Scsi_Host *sh,
2072 unsigned long elapsed_time)
2073 {
2074 struct ctlr_info *h = shost_to_hba(sh);
2075 unsigned long flags;
2076 int finished;
2077
2078 spin_lock_irqsave(&h->scan_lock, flags);
2079 finished = h->scan_finished;
2080 spin_unlock_irqrestore(&h->scan_lock, flags);
2081 return finished;
2082 }
2083
2084 static int hpsa_change_queue_depth(struct scsi_device *sdev,
2085 int qdepth, int reason)
2086 {
2087 struct ctlr_info *h = sdev_to_hba(sdev);
2088
2089 if (reason != SCSI_QDEPTH_DEFAULT)
2090 return -ENOTSUPP;
2091
2092 if (qdepth < 1)
2093 qdepth = 1;
2094 else
2095 if (qdepth > h->nr_cmds)
2096 qdepth = h->nr_cmds;
2097 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2098 return sdev->queue_depth;
2099 }
2100
2101 static void hpsa_unregister_scsi(struct ctlr_info *h)
2102 {
2103 /* we are being forcibly unloaded, and may not refuse. */
2104 scsi_remove_host(h->scsi_host);
2105 scsi_host_put(h->scsi_host);
2106 h->scsi_host = NULL;
2107 }
2108
2109 static int hpsa_register_scsi(struct ctlr_info *h)
2110 {
2111 int rc;
2112
2113 rc = hpsa_scsi_detect(h);
2114 if (rc != 0)
2115 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed"
2116 " hpsa_scsi_detect(), rc is %d\n", rc);
2117 return rc;
2118 }
2119
2120 static int wait_for_device_to_become_ready(struct ctlr_info *h,
2121 unsigned char lunaddr[])
2122 {
2123 int rc = 0;
2124 int count = 0;
2125 int waittime = 1; /* seconds */
2126 struct CommandList *c;
2127
2128 c = cmd_special_alloc(h);
2129 if (!c) {
2130 dev_warn(&h->pdev->dev, "out of memory in "
2131 "wait_for_device_to_become_ready.\n");
2132 return IO_ERROR;
2133 }
2134
2135 /* Send test unit ready until device ready, or give up. */
2136 while (count < HPSA_TUR_RETRY_LIMIT) {
2137
2138 /* Wait for a bit. do this first, because if we send
2139 * the TUR right away, the reset will just abort it.
2140 */
2141 msleep(1000 * waittime);
2142 count++;
2143
2144 /* Increase wait time with each try, up to a point. */
2145 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2146 waittime = waittime * 2;
2147
2148 /* Send the Test Unit Ready */
2149 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
2150 hpsa_scsi_do_simple_cmd_core(h, c);
2151 /* no unmap needed here because no data xfer. */
2152
2153 if (c->err_info->CommandStatus == CMD_SUCCESS)
2154 break;
2155
2156 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2157 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2158 (c->err_info->SenseInfo[2] == NO_SENSE ||
2159 c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2160 break;
2161
2162 dev_warn(&h->pdev->dev, "waiting %d secs "
2163 "for device to become ready.\n", waittime);
2164 rc = 1; /* device not ready. */
2165 }
2166
2167 if (rc)
2168 dev_warn(&h->pdev->dev, "giving up on device.\n");
2169 else
2170 dev_warn(&h->pdev->dev, "device is ready.\n");
2171
2172 cmd_special_free(h, c);
2173 return rc;
2174 }
2175
2176 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
2177 * complaining. Doing a host- or bus-reset can't do anything good here.
2178 */
2179 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2180 {
2181 int rc;
2182 struct ctlr_info *h;
2183 struct hpsa_scsi_dev_t *dev;
2184
2185 /* find the controller to which the command to be aborted was sent */
2186 h = sdev_to_hba(scsicmd->device);
2187 if (h == NULL) /* paranoia */
2188 return FAILED;
2189 dev = scsicmd->device->hostdata;
2190 if (!dev) {
2191 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2192 "device lookup failed.\n");
2193 return FAILED;
2194 }
2195 dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2196 h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2197 /* send a reset to the SCSI LUN which the command was sent to */
2198 rc = hpsa_send_reset(h, dev->scsi3addr);
2199 if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2200 return SUCCESS;
2201
2202 dev_warn(&h->pdev->dev, "resetting device failed.\n");
2203 return FAILED;
2204 }
2205
2206 /*
2207 * For operations that cannot sleep, a command block is allocated at init,
2208 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2209 * which ones are free or in use. Lock must be held when calling this.
2210 * cmd_free() is the complement.
2211 */
2212 static struct CommandList *cmd_alloc(struct ctlr_info *h)
2213 {
2214 struct CommandList *c;
2215 int i;
2216 union u64bit temp64;
2217 dma_addr_t cmd_dma_handle, err_dma_handle;
2218
2219 do {
2220 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2221 if (i == h->nr_cmds)
2222 return NULL;
2223 } while (test_and_set_bit
2224 (i & (BITS_PER_LONG - 1),
2225 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2226 c = h->cmd_pool + i;
2227 memset(c, 0, sizeof(*c));
2228 cmd_dma_handle = h->cmd_pool_dhandle
2229 + i * sizeof(*c);
2230 c->err_info = h->errinfo_pool + i;
2231 memset(c->err_info, 0, sizeof(*c->err_info));
2232 err_dma_handle = h->errinfo_pool_dhandle
2233 + i * sizeof(*c->err_info);
2234 h->nr_allocs++;
2235
2236 c->cmdindex = i;
2237
2238 INIT_HLIST_NODE(&c->list);
2239 c->busaddr = (u32) cmd_dma_handle;
2240 temp64.val = (u64) err_dma_handle;
2241 c->ErrDesc.Addr.lower = temp64.val32.lower;
2242 c->ErrDesc.Addr.upper = temp64.val32.upper;
2243 c->ErrDesc.Len = sizeof(*c->err_info);
2244
2245 c->h = h;
2246 return c;
2247 }
2248
2249 /* For operations that can wait for kmalloc to possibly sleep,
2250 * this routine can be called. Lock need not be held to call
2251 * cmd_special_alloc. cmd_special_free() is the complement.
2252 */
2253 static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2254 {
2255 struct CommandList *c;
2256 union u64bit temp64;
2257 dma_addr_t cmd_dma_handle, err_dma_handle;
2258
2259 c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2260 if (c == NULL)
2261 return NULL;
2262 memset(c, 0, sizeof(*c));
2263
2264 c->cmdindex = -1;
2265
2266 c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2267 &err_dma_handle);
2268
2269 if (c->err_info == NULL) {
2270 pci_free_consistent(h->pdev,
2271 sizeof(*c), c, cmd_dma_handle);
2272 return NULL;
2273 }
2274 memset(c->err_info, 0, sizeof(*c->err_info));
2275
2276 INIT_HLIST_NODE(&c->list);
2277 c->busaddr = (u32) cmd_dma_handle;
2278 temp64.val = (u64) err_dma_handle;
2279 c->ErrDesc.Addr.lower = temp64.val32.lower;
2280 c->ErrDesc.Addr.upper = temp64.val32.upper;
2281 c->ErrDesc.Len = sizeof(*c->err_info);
2282
2283 c->h = h;
2284 return c;
2285 }
2286
2287 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2288 {
2289 int i;
2290
2291 i = c - h->cmd_pool;
2292 clear_bit(i & (BITS_PER_LONG - 1),
2293 h->cmd_pool_bits + (i / BITS_PER_LONG));
2294 h->nr_frees++;
2295 }
2296
2297 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2298 {
2299 union u64bit temp64;
2300
2301 temp64.val32.lower = c->ErrDesc.Addr.lower;
2302 temp64.val32.upper = c->ErrDesc.Addr.upper;
2303 pci_free_consistent(h->pdev, sizeof(*c->err_info),
2304 c->err_info, (dma_addr_t) temp64.val);
2305 pci_free_consistent(h->pdev, sizeof(*c),
2306 c, (dma_addr_t) c->busaddr);
2307 }
2308
2309 #ifdef CONFIG_COMPAT
2310
2311 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2312 {
2313 IOCTL32_Command_struct __user *arg32 =
2314 (IOCTL32_Command_struct __user *) arg;
2315 IOCTL_Command_struct arg64;
2316 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2317 int err;
2318 u32 cp;
2319
2320 err = 0;
2321 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2322 sizeof(arg64.LUN_info));
2323 err |= copy_from_user(&arg64.Request, &arg32->Request,
2324 sizeof(arg64.Request));
2325 err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2326 sizeof(arg64.error_info));
2327 err |= get_user(arg64.buf_size, &arg32->buf_size);
2328 err |= get_user(cp, &arg32->buf);
2329 arg64.buf = compat_ptr(cp);
2330 err |= copy_to_user(p, &arg64, sizeof(arg64));
2331
2332 if (err)
2333 return -EFAULT;
2334
2335 err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2336 if (err)
2337 return err;
2338 err |= copy_in_user(&arg32->error_info, &p->error_info,
2339 sizeof(arg32->error_info));
2340 if (err)
2341 return -EFAULT;
2342 return err;
2343 }
2344
2345 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2346 int cmd, void *arg)
2347 {
2348 BIG_IOCTL32_Command_struct __user *arg32 =
2349 (BIG_IOCTL32_Command_struct __user *) arg;
2350 BIG_IOCTL_Command_struct arg64;
2351 BIG_IOCTL_Command_struct __user *p =
2352 compat_alloc_user_space(sizeof(arg64));
2353 int err;
2354 u32 cp;
2355
2356 err = 0;
2357 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2358 sizeof(arg64.LUN_info));
2359 err |= copy_from_user(&arg64.Request, &arg32->Request,
2360 sizeof(arg64.Request));
2361 err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2362 sizeof(arg64.error_info));
2363 err |= get_user(arg64.buf_size, &arg32->buf_size);
2364 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2365 err |= get_user(cp, &arg32->buf);
2366 arg64.buf = compat_ptr(cp);
2367 err |= copy_to_user(p, &arg64, sizeof(arg64));
2368
2369 if (err)
2370 return -EFAULT;
2371
2372 err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2373 if (err)
2374 return err;
2375 err |= copy_in_user(&arg32->error_info, &p->error_info,
2376 sizeof(arg32->error_info));
2377 if (err)
2378 return -EFAULT;
2379 return err;
2380 }
2381
2382 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2383 {
2384 switch (cmd) {
2385 case CCISS_GETPCIINFO:
2386 case CCISS_GETINTINFO:
2387 case CCISS_SETINTINFO:
2388 case CCISS_GETNODENAME:
2389 case CCISS_SETNODENAME:
2390 case CCISS_GETHEARTBEAT:
2391 case CCISS_GETBUSTYPES:
2392 case CCISS_GETFIRMVER:
2393 case CCISS_GETDRIVVER:
2394 case CCISS_REVALIDVOLS:
2395 case CCISS_DEREGDISK:
2396 case CCISS_REGNEWDISK:
2397 case CCISS_REGNEWD:
2398 case CCISS_RESCANDISK:
2399 case CCISS_GETLUNINFO:
2400 return hpsa_ioctl(dev, cmd, arg);
2401
2402 case CCISS_PASSTHRU32:
2403 return hpsa_ioctl32_passthru(dev, cmd, arg);
2404 case CCISS_BIG_PASSTHRU32:
2405 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2406
2407 default:
2408 return -ENOIOCTLCMD;
2409 }
2410 }
2411 #endif
2412
2413 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2414 {
2415 struct hpsa_pci_info pciinfo;
2416
2417 if (!argp)
2418 return -EINVAL;
2419 pciinfo.domain = pci_domain_nr(h->pdev->bus);
2420 pciinfo.bus = h->pdev->bus->number;
2421 pciinfo.dev_fn = h->pdev->devfn;
2422 pciinfo.board_id = h->board_id;
2423 if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2424 return -EFAULT;
2425 return 0;
2426 }
2427
2428 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2429 {
2430 DriverVer_type DriverVer;
2431 unsigned char vmaj, vmin, vsubmin;
2432 int rc;
2433
2434 rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2435 &vmaj, &vmin, &vsubmin);
2436 if (rc != 3) {
2437 dev_info(&h->pdev->dev, "driver version string '%s' "
2438 "unrecognized.", HPSA_DRIVER_VERSION);
2439 vmaj = 0;
2440 vmin = 0;
2441 vsubmin = 0;
2442 }
2443 DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2444 if (!argp)
2445 return -EINVAL;
2446 if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2447 return -EFAULT;
2448 return 0;
2449 }
2450
2451 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2452 {
2453 IOCTL_Command_struct iocommand;
2454 struct CommandList *c;
2455 char *buff = NULL;
2456 union u64bit temp64;
2457
2458 if (!argp)
2459 return -EINVAL;
2460 if (!capable(CAP_SYS_RAWIO))
2461 return -EPERM;
2462 if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2463 return -EFAULT;
2464 if ((iocommand.buf_size < 1) &&
2465 (iocommand.Request.Type.Direction != XFER_NONE)) {
2466 return -EINVAL;
2467 }
2468 if (iocommand.buf_size > 0) {
2469 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2470 if (buff == NULL)
2471 return -EFAULT;
2472 }
2473 if (iocommand.Request.Type.Direction == XFER_WRITE) {
2474 /* Copy the data into the buffer we created */
2475 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) {
2476 kfree(buff);
2477 return -EFAULT;
2478 }
2479 } else
2480 memset(buff, 0, iocommand.buf_size);
2481 c = cmd_special_alloc(h);
2482 if (c == NULL) {
2483 kfree(buff);
2484 return -ENOMEM;
2485 }
2486 /* Fill in the command type */
2487 c->cmd_type = CMD_IOCTL_PEND;
2488 /* Fill in Command Header */
2489 c->Header.ReplyQueue = 0; /* unused in simple mode */
2490 if (iocommand.buf_size > 0) { /* buffer to fill */
2491 c->Header.SGList = 1;
2492 c->Header.SGTotal = 1;
2493 } else { /* no buffers to fill */
2494 c->Header.SGList = 0;
2495 c->Header.SGTotal = 0;
2496 }
2497 memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2498 /* use the kernel address the cmd block for tag */
2499 c->Header.Tag.lower = c->busaddr;
2500
2501 /* Fill in Request block */
2502 memcpy(&c->Request, &iocommand.Request,
2503 sizeof(c->Request));
2504
2505 /* Fill in the scatter gather information */
2506 if (iocommand.buf_size > 0) {
2507 temp64.val = pci_map_single(h->pdev, buff,
2508 iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2509 c->SG[0].Addr.lower = temp64.val32.lower;
2510 c->SG[0].Addr.upper = temp64.val32.upper;
2511 c->SG[0].Len = iocommand.buf_size;
2512 c->SG[0].Ext = 0; /* we are not chaining*/
2513 }
2514 hpsa_scsi_do_simple_cmd_core(h, c);
2515 hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2516 check_ioctl_unit_attention(h, c);
2517
2518 /* Copy the error information out */
2519 memcpy(&iocommand.error_info, c->err_info,
2520 sizeof(iocommand.error_info));
2521 if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
2522 kfree(buff);
2523 cmd_special_free(h, c);
2524 return -EFAULT;
2525 }
2526
2527 if (iocommand.Request.Type.Direction == XFER_READ) {
2528 /* Copy the data out of the buffer we created */
2529 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
2530 kfree(buff);
2531 cmd_special_free(h, c);
2532 return -EFAULT;
2533 }
2534 }
2535 kfree(buff);
2536 cmd_special_free(h, c);
2537 return 0;
2538 }
2539
2540 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2541 {
2542 BIG_IOCTL_Command_struct *ioc;
2543 struct CommandList *c;
2544 unsigned char **buff = NULL;
2545 int *buff_size = NULL;
2546 union u64bit temp64;
2547 BYTE sg_used = 0;
2548 int status = 0;
2549 int i;
2550 u32 left;
2551 u32 sz;
2552 BYTE __user *data_ptr;
2553
2554 if (!argp)
2555 return -EINVAL;
2556 if (!capable(CAP_SYS_RAWIO))
2557 return -EPERM;
2558 ioc = (BIG_IOCTL_Command_struct *)
2559 kmalloc(sizeof(*ioc), GFP_KERNEL);
2560 if (!ioc) {
2561 status = -ENOMEM;
2562 goto cleanup1;
2563 }
2564 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
2565 status = -EFAULT;
2566 goto cleanup1;
2567 }
2568 if ((ioc->buf_size < 1) &&
2569 (ioc->Request.Type.Direction != XFER_NONE)) {
2570 status = -EINVAL;
2571 goto cleanup1;
2572 }
2573 /* Check kmalloc limits using all SGs */
2574 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
2575 status = -EINVAL;
2576 goto cleanup1;
2577 }
2578 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
2579 status = -EINVAL;
2580 goto cleanup1;
2581 }
2582 buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
2583 if (!buff) {
2584 status = -ENOMEM;
2585 goto cleanup1;
2586 }
2587 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
2588 if (!buff_size) {
2589 status = -ENOMEM;
2590 goto cleanup1;
2591 }
2592 left = ioc->buf_size;
2593 data_ptr = ioc->buf;
2594 while (left) {
2595 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
2596 buff_size[sg_used] = sz;
2597 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
2598 if (buff[sg_used] == NULL) {
2599 status = -ENOMEM;
2600 goto cleanup1;
2601 }
2602 if (ioc->Request.Type.Direction == XFER_WRITE) {
2603 if (copy_from_user(buff[sg_used], data_ptr, sz)) {
2604 status = -ENOMEM;
2605 goto cleanup1;
2606 }
2607 } else
2608 memset(buff[sg_used], 0, sz);
2609 left -= sz;
2610 data_ptr += sz;
2611 sg_used++;
2612 }
2613 c = cmd_special_alloc(h);
2614 if (c == NULL) {
2615 status = -ENOMEM;
2616 goto cleanup1;
2617 }
2618 c->cmd_type = CMD_IOCTL_PEND;
2619 c->Header.ReplyQueue = 0;
2620
2621 if (ioc->buf_size > 0) {
2622 c->Header.SGList = sg_used;
2623 c->Header.SGTotal = sg_used;
2624 } else {
2625 c->Header.SGList = 0;
2626 c->Header.SGTotal = 0;
2627 }
2628 memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
2629 c->Header.Tag.lower = c->busaddr;
2630 memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
2631 if (ioc->buf_size > 0) {
2632 int i;
2633 for (i = 0; i < sg_used; i++) {
2634 temp64.val = pci_map_single(h->pdev, buff[i],
2635 buff_size[i], PCI_DMA_BIDIRECTIONAL);
2636 c->SG[i].Addr.lower = temp64.val32.lower;
2637 c->SG[i].Addr.upper = temp64.val32.upper;
2638 c->SG[i].Len = buff_size[i];
2639 /* we are not chaining */
2640 c->SG[i].Ext = 0;
2641 }
2642 }
2643 hpsa_scsi_do_simple_cmd_core(h, c);
2644 hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
2645 check_ioctl_unit_attention(h, c);
2646 /* Copy the error information out */
2647 memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
2648 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
2649 cmd_special_free(h, c);
2650 status = -EFAULT;
2651 goto cleanup1;
2652 }
2653 if (ioc->Request.Type.Direction == XFER_READ) {
2654 /* Copy the data out of the buffer we created */
2655 BYTE __user *ptr = ioc->buf;
2656 for (i = 0; i < sg_used; i++) {
2657 if (copy_to_user(ptr, buff[i], buff_size[i])) {
2658 cmd_special_free(h, c);
2659 status = -EFAULT;
2660 goto cleanup1;
2661 }
2662 ptr += buff_size[i];
2663 }
2664 }
2665 cmd_special_free(h, c);
2666 status = 0;
2667 cleanup1:
2668 if (buff) {
2669 for (i = 0; i < sg_used; i++)
2670 kfree(buff[i]);
2671 kfree(buff);
2672 }
2673 kfree(buff_size);
2674 kfree(ioc);
2675 return status;
2676 }
2677
2678 static void check_ioctl_unit_attention(struct ctlr_info *h,
2679 struct CommandList *c)
2680 {
2681 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2682 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
2683 (void) check_for_unit_attention(h, c);
2684 }
2685 /*
2686 * ioctl
2687 */
2688 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
2689 {
2690 struct ctlr_info *h;
2691 void __user *argp = (void __user *)arg;
2692
2693 h = sdev_to_hba(dev);
2694
2695 switch (cmd) {
2696 case CCISS_DEREGDISK:
2697 case CCISS_REGNEWDISK:
2698 case CCISS_REGNEWD:
2699 hpsa_scan_start(h->scsi_host);
2700 return 0;
2701 case CCISS_GETPCIINFO:
2702 return hpsa_getpciinfo_ioctl(h, argp);
2703 case CCISS_GETDRIVVER:
2704 return hpsa_getdrivver_ioctl(h, argp);
2705 case CCISS_PASSTHRU:
2706 return hpsa_passthru_ioctl(h, argp);
2707 case CCISS_BIG_PASSTHRU:
2708 return hpsa_big_passthru_ioctl(h, argp);
2709 default:
2710 return -ENOTTY;
2711 }
2712 }
2713
2714 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
2715 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
2716 int cmd_type)
2717 {
2718 int pci_dir = XFER_NONE;
2719
2720 c->cmd_type = CMD_IOCTL_PEND;
2721 c->Header.ReplyQueue = 0;
2722 if (buff != NULL && size > 0) {
2723 c->Header.SGList = 1;
2724 c->Header.SGTotal = 1;
2725 } else {
2726 c->Header.SGList = 0;
2727 c->Header.SGTotal = 0;
2728 }
2729 c->Header.Tag.lower = c->busaddr;
2730 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2731
2732 c->Request.Type.Type = cmd_type;
2733 if (cmd_type == TYPE_CMD) {
2734 switch (cmd) {
2735 case HPSA_INQUIRY:
2736 /* are we trying to read a vital product page */
2737 if (page_code != 0) {
2738 c->Request.CDB[1] = 0x01;
2739 c->Request.CDB[2] = page_code;
2740 }
2741 c->Request.CDBLen = 6;
2742 c->Request.Type.Attribute = ATTR_SIMPLE;
2743 c->Request.Type.Direction = XFER_READ;
2744 c->Request.Timeout = 0;
2745 c->Request.CDB[0] = HPSA_INQUIRY;
2746 c->Request.CDB[4] = size & 0xFF;
2747 break;
2748 case HPSA_REPORT_LOG:
2749 case HPSA_REPORT_PHYS:
2750 /* Talking to controller so It's a physical command
2751 mode = 00 target = 0. Nothing to write.
2752 */
2753 c->Request.CDBLen = 12;
2754 c->Request.Type.Attribute = ATTR_SIMPLE;
2755 c->Request.Type.Direction = XFER_READ;
2756 c->Request.Timeout = 0;
2757 c->Request.CDB[0] = cmd;
2758 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2759 c->Request.CDB[7] = (size >> 16) & 0xFF;
2760 c->Request.CDB[8] = (size >> 8) & 0xFF;
2761 c->Request.CDB[9] = size & 0xFF;
2762 break;
2763
2764 case HPSA_READ_CAPACITY:
2765 c->Request.CDBLen = 10;
2766 c->Request.Type.Attribute = ATTR_SIMPLE;
2767 c->Request.Type.Direction = XFER_READ;
2768 c->Request.Timeout = 0;
2769 c->Request.CDB[0] = cmd;
2770 break;
2771 case HPSA_CACHE_FLUSH:
2772 c->Request.CDBLen = 12;
2773 c->Request.Type.Attribute = ATTR_SIMPLE;
2774 c->Request.Type.Direction = XFER_WRITE;
2775 c->Request.Timeout = 0;
2776 c->Request.CDB[0] = BMIC_WRITE;
2777 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2778 break;
2779 case TEST_UNIT_READY:
2780 c->Request.CDBLen = 6;
2781 c->Request.Type.Attribute = ATTR_SIMPLE;
2782 c->Request.Type.Direction = XFER_NONE;
2783 c->Request.Timeout = 0;
2784 break;
2785 default:
2786 dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
2787 BUG();
2788 return;
2789 }
2790 } else if (cmd_type == TYPE_MSG) {
2791 switch (cmd) {
2792
2793 case HPSA_DEVICE_RESET_MSG:
2794 c->Request.CDBLen = 16;
2795 c->Request.Type.Type = 1; /* It is a MSG not a CMD */
2796 c->Request.Type.Attribute = ATTR_SIMPLE;
2797 c->Request.Type.Direction = XFER_NONE;
2798 c->Request.Timeout = 0; /* Don't time out */
2799 c->Request.CDB[0] = 0x01; /* RESET_MSG is 0x01 */
2800 c->Request.CDB[1] = 0x03; /* Reset target above */
2801 /* If bytes 4-7 are zero, it means reset the */
2802 /* LunID device */
2803 c->Request.CDB[4] = 0x00;
2804 c->Request.CDB[5] = 0x00;
2805 c->Request.CDB[6] = 0x00;
2806 c->Request.CDB[7] = 0x00;
2807 break;
2808
2809 default:
2810 dev_warn(&h->pdev->dev, "unknown message type %d\n",
2811 cmd);
2812 BUG();
2813 }
2814 } else {
2815 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
2816 BUG();
2817 }
2818
2819 switch (c->Request.Type.Direction) {
2820 case XFER_READ:
2821 pci_dir = PCI_DMA_FROMDEVICE;
2822 break;
2823 case XFER_WRITE:
2824 pci_dir = PCI_DMA_TODEVICE;
2825 break;
2826 case XFER_NONE:
2827 pci_dir = PCI_DMA_NONE;
2828 break;
2829 default:
2830 pci_dir = PCI_DMA_BIDIRECTIONAL;
2831 }
2832
2833 hpsa_map_one(h->pdev, c, buff, size, pci_dir);
2834
2835 return;
2836 }
2837
2838 /*
2839 * Map (physical) PCI mem into (virtual) kernel space
2840 */
2841 static void __iomem *remap_pci_mem(ulong base, ulong size)
2842 {
2843 ulong page_base = ((ulong) base) & PAGE_MASK;
2844 ulong page_offs = ((ulong) base) - page_base;
2845 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2846
2847 return page_remapped ? (page_remapped + page_offs) : NULL;
2848 }
2849
2850 /* Takes cmds off the submission queue and sends them to the hardware,
2851 * then puts them on the queue of cmds waiting for completion.
2852 */
2853 static void start_io(struct ctlr_info *h)
2854 {
2855 struct CommandList *c;
2856
2857 while (!hlist_empty(&h->reqQ)) {
2858 c = hlist_entry(h->reqQ.first, struct CommandList, list);
2859 /* can't do anything if fifo is full */
2860 if ((h->access.fifo_full(h))) {
2861 dev_warn(&h->pdev->dev, "fifo full\n");
2862 break;
2863 }
2864
2865 /* Get the first entry from the Request Q */
2866 removeQ(c);
2867 h->Qdepth--;
2868
2869 /* Tell the controller execute command */
2870 h->access.submit_command(h, c);
2871
2872 /* Put job onto the completed Q */
2873 addQ(&h->cmpQ, c);
2874 }
2875 }
2876
2877 static inline unsigned long get_next_completion(struct ctlr_info *h)
2878 {
2879 return h->access.command_completed(h);
2880 }
2881
2882 static inline bool interrupt_pending(struct ctlr_info *h)
2883 {
2884 return h->access.intr_pending(h);
2885 }
2886
2887 static inline long interrupt_not_for_us(struct ctlr_info *h)
2888 {
2889 return !(h->msi_vector || h->msix_vector) &&
2890 ((h->access.intr_pending(h) == 0) ||
2891 (h->interrupts_enabled == 0));
2892 }
2893
2894 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
2895 u32 raw_tag)
2896 {
2897 if (unlikely(tag_index >= h->nr_cmds)) {
2898 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
2899 return 1;
2900 }
2901 return 0;
2902 }
2903
2904 static inline void finish_cmd(struct CommandList *c, u32 raw_tag)
2905 {
2906 removeQ(c);
2907 if (likely(c->cmd_type == CMD_SCSI))
2908 complete_scsi_command(c, 0, raw_tag);
2909 else if (c->cmd_type == CMD_IOCTL_PEND)
2910 complete(c->waiting);
2911 }
2912
2913 static inline u32 hpsa_tag_contains_index(u32 tag)
2914 {
2915 #define DIRECT_LOOKUP_BIT 0x10
2916 return tag & DIRECT_LOOKUP_BIT;
2917 }
2918
2919 static inline u32 hpsa_tag_to_index(u32 tag)
2920 {
2921 #define DIRECT_LOOKUP_SHIFT 5
2922 return tag >> DIRECT_LOOKUP_SHIFT;
2923 }
2924
2925 static inline u32 hpsa_tag_discard_error_bits(u32 tag)
2926 {
2927 #define HPSA_ERROR_BITS 0x03
2928 return tag & ~HPSA_ERROR_BITS;
2929 }
2930
2931 /* process completion of an indexed ("direct lookup") command */
2932 static inline u32 process_indexed_cmd(struct ctlr_info *h,
2933 u32 raw_tag)
2934 {
2935 u32 tag_index;
2936 struct CommandList *c;
2937
2938 tag_index = hpsa_tag_to_index(raw_tag);
2939 if (bad_tag(h, tag_index, raw_tag))
2940 return next_command(h);
2941 c = h->cmd_pool + tag_index;
2942 finish_cmd(c, raw_tag);
2943 return next_command(h);
2944 }
2945
2946 /* process completion of a non-indexed command */
2947 static inline u32 process_nonindexed_cmd(struct ctlr_info *h,
2948 u32 raw_tag)
2949 {
2950 u32 tag;
2951 struct CommandList *c = NULL;
2952 struct hlist_node *tmp;
2953
2954 tag = hpsa_tag_discard_error_bits(raw_tag);
2955 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
2956 if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
2957 finish_cmd(c, raw_tag);
2958 return next_command(h);
2959 }
2960 }
2961 bad_tag(h, h->nr_cmds + 1, raw_tag);
2962 return next_command(h);
2963 }
2964
2965 static irqreturn_t do_hpsa_intr(int irq, void *dev_id)
2966 {
2967 struct ctlr_info *h = dev_id;
2968 unsigned long flags;
2969 u32 raw_tag;
2970
2971 if (interrupt_not_for_us(h))
2972 return IRQ_NONE;
2973 spin_lock_irqsave(&h->lock, flags);
2974 raw_tag = get_next_completion(h);
2975 while (raw_tag != FIFO_EMPTY) {
2976 if (hpsa_tag_contains_index(raw_tag))
2977 raw_tag = process_indexed_cmd(h, raw_tag);
2978 else
2979 raw_tag = process_nonindexed_cmd(h, raw_tag);
2980 }
2981 spin_unlock_irqrestore(&h->lock, flags);
2982 return IRQ_HANDLED;
2983 }
2984
2985 /* Send a message CDB to the firmware. */
2986 static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
2987 unsigned char type)
2988 {
2989 struct Command {
2990 struct CommandListHeader CommandHeader;
2991 struct RequestBlock Request;
2992 struct ErrDescriptor ErrorDescriptor;
2993 };
2994 struct Command *cmd;
2995 static const size_t cmd_sz = sizeof(*cmd) +
2996 sizeof(cmd->ErrorDescriptor);
2997 dma_addr_t paddr64;
2998 uint32_t paddr32, tag;
2999 void __iomem *vaddr;
3000 int i, err;
3001
3002 vaddr = pci_ioremap_bar(pdev, 0);
3003 if (vaddr == NULL)
3004 return -ENOMEM;
3005
3006 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3007 * CCISS commands, so they must be allocated from the lower 4GiB of
3008 * memory.
3009 */
3010 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3011 if (err) {
3012 iounmap(vaddr);
3013 return -ENOMEM;
3014 }
3015
3016 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3017 if (cmd == NULL) {
3018 iounmap(vaddr);
3019 return -ENOMEM;
3020 }
3021
3022 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3023 * although there's no guarantee, we assume that the address is at
3024 * least 4-byte aligned (most likely, it's page-aligned).
3025 */
3026 paddr32 = paddr64;
3027
3028 cmd->CommandHeader.ReplyQueue = 0;
3029 cmd->CommandHeader.SGList = 0;
3030 cmd->CommandHeader.SGTotal = 0;
3031 cmd->CommandHeader.Tag.lower = paddr32;
3032 cmd->CommandHeader.Tag.upper = 0;
3033 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3034
3035 cmd->Request.CDBLen = 16;
3036 cmd->Request.Type.Type = TYPE_MSG;
3037 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3038 cmd->Request.Type.Direction = XFER_NONE;
3039 cmd->Request.Timeout = 0; /* Don't time out */
3040 cmd->Request.CDB[0] = opcode;
3041 cmd->Request.CDB[1] = type;
3042 memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
3043 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
3044 cmd->ErrorDescriptor.Addr.upper = 0;
3045 cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
3046
3047 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3048
3049 for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
3050 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3051 if (hpsa_tag_discard_error_bits(tag) == paddr32)
3052 break;
3053 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
3054 }
3055
3056 iounmap(vaddr);
3057
3058 /* we leak the DMA buffer here ... no choice since the controller could
3059 * still complete the command.
3060 */
3061 if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
3062 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
3063 opcode, type);
3064 return -ETIMEDOUT;
3065 }
3066
3067 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3068
3069 if (tag & HPSA_ERROR_BIT) {
3070 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3071 opcode, type);
3072 return -EIO;
3073 }
3074
3075 dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3076 opcode, type);
3077 return 0;
3078 }
3079
3080 #define hpsa_soft_reset_controller(p) hpsa_message(p, 1, 0)
3081 #define hpsa_noop(p) hpsa_message(p, 3, 0)
3082
3083 static __devinit int hpsa_reset_msi(struct pci_dev *pdev)
3084 {
3085 /* the #defines are stolen from drivers/pci/msi.h. */
3086 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
3087 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
3088
3089 int pos;
3090 u16 control = 0;
3091
3092 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
3093 if (pos) {
3094 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3095 if (control & PCI_MSI_FLAGS_ENABLE) {
3096 dev_info(&pdev->dev, "resetting MSI\n");
3097 pci_write_config_word(pdev, msi_control_reg(pos),
3098 control & ~PCI_MSI_FLAGS_ENABLE);
3099 }
3100 }
3101
3102 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3103 if (pos) {
3104 pci_read_config_word(pdev, msi_control_reg(pos), &control);
3105 if (control & PCI_MSIX_FLAGS_ENABLE) {
3106 dev_info(&pdev->dev, "resetting MSI-X\n");
3107 pci_write_config_word(pdev, msi_control_reg(pos),
3108 control & ~PCI_MSIX_FLAGS_ENABLE);
3109 }
3110 }
3111
3112 return 0;
3113 }
3114
3115 /* This does a hard reset of the controller using PCI power management
3116 * states.
3117 */
3118 static __devinit int hpsa_hard_reset_controller(struct pci_dev *pdev)
3119 {
3120 u16 pmcsr, saved_config_space[32];
3121 int i, pos;
3122
3123 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3124
3125 /* This is very nearly the same thing as
3126 *
3127 * pci_save_state(pci_dev);
3128 * pci_set_power_state(pci_dev, PCI_D3hot);
3129 * pci_set_power_state(pci_dev, PCI_D0);
3130 * pci_restore_state(pci_dev);
3131 *
3132 * but we can't use these nice canned kernel routines on
3133 * kexec, because they also check the MSI/MSI-X state in PCI
3134 * configuration space and do the wrong thing when it is
3135 * set/cleared. Also, the pci_save/restore_state functions
3136 * violate the ordering requirements for restoring the
3137 * configuration space from the CCISS document (see the
3138 * comment below). So we roll our own ....
3139 */
3140
3141 for (i = 0; i < 32; i++)
3142 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
3143
3144 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3145 if (pos == 0) {
3146 dev_err(&pdev->dev,
3147 "hpsa_reset_controller: PCI PM not supported\n");
3148 return -ENODEV;
3149 }
3150
3151 /* Quoting from the Open CISS Specification: "The Power
3152 * Management Control/Status Register (CSR) controls the power
3153 * state of the device. The normal operating state is D0,
3154 * CSR=00h. The software off state is D3, CSR=03h. To reset
3155 * the controller, place the interface device in D3 then to
3156 * D0, this causes a secondary PCI reset which will reset the
3157 * controller."
3158 */
3159
3160 /* enter the D3hot power management state */
3161 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3162 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3163 pmcsr |= PCI_D3hot;
3164 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3165
3166 msleep(500);
3167
3168 /* enter the D0 power management state */
3169 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3170 pmcsr |= PCI_D0;
3171 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3172
3173 msleep(500);
3174
3175 /* Restore the PCI configuration space. The Open CISS
3176 * Specification says, "Restore the PCI Configuration
3177 * Registers, offsets 00h through 60h. It is important to
3178 * restore the command register, 16-bits at offset 04h,
3179 * last. Do not restore the configuration status register,
3180 * 16-bits at offset 06h." Note that the offset is 2*i.
3181 */
3182 for (i = 0; i < 32; i++) {
3183 if (i == 2 || i == 3)
3184 continue;
3185 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
3186 }
3187 wmb();
3188 pci_write_config_word(pdev, 4, saved_config_space[2]);
3189
3190 return 0;
3191 }
3192
3193 /*
3194 * We cannot read the structure directly, for portability we must use
3195 * the io functions.
3196 * This is for debug only.
3197 */
3198 #ifdef HPSA_DEBUG
3199 static void print_cfg_table(struct device *dev, struct CfgTable *tb)
3200 {
3201 int i;
3202 char temp_name[17];
3203
3204 dev_info(dev, "Controller Configuration information\n");
3205 dev_info(dev, "------------------------------------\n");
3206 for (i = 0; i < 4; i++)
3207 temp_name[i] = readb(&(tb->Signature[i]));
3208 temp_name[4] = '\0';
3209 dev_info(dev, " Signature = %s\n", temp_name);
3210 dev_info(dev, " Spec Number = %d\n", readl(&(tb->SpecValence)));
3211 dev_info(dev, " Transport methods supported = 0x%x\n",
3212 readl(&(tb->TransportSupport)));
3213 dev_info(dev, " Transport methods active = 0x%x\n",
3214 readl(&(tb->TransportActive)));
3215 dev_info(dev, " Requested transport Method = 0x%x\n",
3216 readl(&(tb->HostWrite.TransportRequest)));
3217 dev_info(dev, " Coalesce Interrupt Delay = 0x%x\n",
3218 readl(&(tb->HostWrite.CoalIntDelay)));
3219 dev_info(dev, " Coalesce Interrupt Count = 0x%x\n",
3220 readl(&(tb->HostWrite.CoalIntCount)));
3221 dev_info(dev, " Max outstanding commands = 0x%d\n",
3222 readl(&(tb->CmdsOutMax)));
3223 dev_info(dev, " Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3224 for (i = 0; i < 16; i++)
3225 temp_name[i] = readb(&(tb->ServerName[i]));
3226 temp_name[16] = '\0';
3227 dev_info(dev, " Server Name = %s\n", temp_name);
3228 dev_info(dev, " Heartbeat Counter = 0x%x\n\n\n",
3229 readl(&(tb->HeartBeat)));
3230 }
3231 #endif /* HPSA_DEBUG */
3232
3233 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3234 {
3235 int i, offset, mem_type, bar_type;
3236
3237 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3238 return 0;
3239 offset = 0;
3240 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3241 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3242 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3243 offset += 4;
3244 else {
3245 mem_type = pci_resource_flags(pdev, i) &
3246 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3247 switch (mem_type) {
3248 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3249 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3250 offset += 4; /* 32 bit */
3251 break;
3252 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3253 offset += 8;
3254 break;
3255 default: /* reserved in PCI 2.2 */
3256 dev_warn(&pdev->dev,
3257 "base address is invalid\n");
3258 return -1;
3259 break;
3260 }
3261 }
3262 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3263 return i + 1;
3264 }
3265 return -1;
3266 }
3267
3268 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3269 * controllers that are capable. If not, we use IO-APIC mode.
3270 */
3271
3272 static void __devinit hpsa_interrupt_mode(struct ctlr_info *h,
3273 struct pci_dev *pdev, u32 board_id)
3274 {
3275 #ifdef CONFIG_PCI_MSI
3276 int err;
3277 struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1},
3278 {0, 2}, {0, 3}
3279 };
3280
3281 /* Some boards advertise MSI but don't really support it */
3282 if ((board_id == 0x40700E11) ||
3283 (board_id == 0x40800E11) ||
3284 (board_id == 0x40820E11) || (board_id == 0x40830E11))
3285 goto default_int_mode;
3286 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3287 dev_info(&pdev->dev, "MSIX\n");
3288 err = pci_enable_msix(pdev, hpsa_msix_entries, 4);
3289 if (!err) {
3290 h->intr[0] = hpsa_msix_entries[0].vector;
3291 h->intr[1] = hpsa_msix_entries[1].vector;
3292 h->intr[2] = hpsa_msix_entries[2].vector;
3293 h->intr[3] = hpsa_msix_entries[3].vector;
3294 h->msix_vector = 1;
3295 return;
3296 }
3297 if (err > 0) {
3298 dev_warn(&pdev->dev, "only %d MSI-X vectors "
3299 "available\n", err);
3300 goto default_int_mode;
3301 } else {
3302 dev_warn(&pdev->dev, "MSI-X init failed %d\n",
3303 err);
3304 goto default_int_mode;
3305 }
3306 }
3307 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3308 dev_info(&pdev->dev, "MSI\n");
3309 if (!pci_enable_msi(pdev))
3310 h->msi_vector = 1;
3311 else
3312 dev_warn(&pdev->dev, "MSI init failed\n");
3313 }
3314 default_int_mode:
3315 #endif /* CONFIG_PCI_MSI */
3316 /* if we get here we're going to use the default interrupt mode */
3317 h->intr[PERF_MODE_INT] = pdev->irq;
3318 }
3319
3320 static int hpsa_pci_init(struct ctlr_info *h, struct pci_dev *pdev)
3321 {
3322 ushort subsystem_vendor_id, subsystem_device_id, command;
3323 u32 board_id, scratchpad = 0;
3324 u64 cfg_offset;
3325 u32 cfg_base_addr;
3326 u64 cfg_base_addr_index;
3327 u32 trans_offset;
3328 int i, prod_index, err;
3329
3330 subsystem_vendor_id = pdev->subsystem_vendor;
3331 subsystem_device_id = pdev->subsystem_device;
3332 board_id = (((u32) (subsystem_device_id << 16) & 0xffff0000) |
3333 subsystem_vendor_id);
3334
3335 for (i = 0; i < ARRAY_SIZE(products); i++)
3336 if (board_id == products[i].board_id)
3337 break;
3338
3339 prod_index = i;
3340
3341 if (prod_index == ARRAY_SIZE(products)) {
3342 prod_index--;
3343 if (subsystem_vendor_id != PCI_VENDOR_ID_HP ||
3344 !hpsa_allow_any) {
3345 dev_warn(&pdev->dev, "unrecognized board ID:"
3346 " 0x%08lx, ignoring.\n",
3347 (unsigned long) board_id);
3348 return -ENODEV;
3349 }
3350 }
3351 /* check to see if controller has been disabled
3352 * BEFORE trying to enable it
3353 */
3354 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3355 if (!(command & 0x02)) {
3356 dev_warn(&pdev->dev, "controller appears to be disabled\n");
3357 return -ENODEV;
3358 }
3359
3360 err = pci_enable_device(pdev);
3361 if (err) {
3362 dev_warn(&pdev->dev, "unable to enable PCI device\n");
3363 return err;
3364 }
3365
3366 err = pci_request_regions(pdev, "hpsa");
3367 if (err) {
3368 dev_err(&pdev->dev, "cannot obtain PCI resources, aborting\n");
3369 return err;
3370 }
3371
3372 /* If the kernel supports MSI/MSI-X we will try to enable that,
3373 * else we use the IO-APIC interrupt assigned to us by system ROM.
3374 */
3375 hpsa_interrupt_mode(h, pdev, board_id);
3376
3377 /* find the memory BAR */
3378 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3379 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3380 break;
3381 }
3382 if (i == DEVICE_COUNT_RESOURCE) {
3383 dev_warn(&pdev->dev, "no memory BAR found\n");
3384 err = -ENODEV;
3385 goto err_out_free_res;
3386 }
3387
3388 h->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3389 * already removed
3390 */
3391
3392 h->vaddr = remap_pci_mem(h->paddr, 0x250);
3393
3394 /* Wait for the board to become ready. */
3395 for (i = 0; i < HPSA_BOARD_READY_ITERATIONS; i++) {
3396 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
3397 if (scratchpad == HPSA_FIRMWARE_READY)
3398 break;
3399 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
3400 }
3401 if (scratchpad != HPSA_FIRMWARE_READY) {
3402 dev_warn(&pdev->dev, "board not ready, timed out.\n");
3403 err = -ENODEV;
3404 goto err_out_free_res;
3405 }
3406
3407 /* get the address index number */
3408 cfg_base_addr = readl(h->vaddr + SA5_CTCFG_OFFSET);
3409 cfg_base_addr &= (u32) 0x0000ffff;
3410 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
3411 if (cfg_base_addr_index == -1) {
3412 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
3413 err = -ENODEV;
3414 goto err_out_free_res;
3415 }
3416
3417 cfg_offset = readl(h->vaddr + SA5_CTMEM_OFFSET);
3418 h->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3419 cfg_base_addr_index) + cfg_offset,
3420 sizeof(h->cfgtable));
3421 /* Find performant mode table. */
3422 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3423 h->transtable = remap_pci_mem(pci_resource_start(pdev,
3424 cfg_base_addr_index)+cfg_offset+trans_offset,
3425 sizeof(*h->transtable));
3426
3427 h->board_id = board_id;
3428 h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3429 h->product_name = products[prod_index].product_name;
3430 h->access = *(products[prod_index].access);
3431 /* Allow room for some ioctls */
3432 h->nr_cmds = h->max_commands - 4;
3433
3434 if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
3435 (readb(&h->cfgtable->Signature[1]) != 'I') ||
3436 (readb(&h->cfgtable->Signature[2]) != 'S') ||
3437 (readb(&h->cfgtable->Signature[3]) != 'S')) {
3438 dev_warn(&pdev->dev, "not a valid CISS config table\n");
3439 err = -ENODEV;
3440 goto err_out_free_res;
3441 }
3442 #ifdef CONFIG_X86
3443 {
3444 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3445 u32 prefetch;
3446 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
3447 prefetch |= 0x100;
3448 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
3449 }
3450 #endif
3451
3452 /* Disabling DMA prefetch for the P600
3453 * An ASIC bug may result in a prefetch beyond
3454 * physical memory.
3455 */
3456 if (board_id == 0x3225103C) {
3457 u32 dma_prefetch;
3458 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
3459 dma_prefetch |= 0x8000;
3460 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
3461 }
3462
3463 h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3464 /* Update the field, and then ring the doorbell */
3465 writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
3466 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3467
3468 /* under certain very rare conditions, this can take awhile.
3469 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3470 * as we enter this code.)
3471 */
3472 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3473 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3474 break;
3475 /* delay and try again */
3476 msleep(10);
3477 }
3478
3479 #ifdef HPSA_DEBUG
3480 print_cfg_table(&pdev->dev, h->cfgtable);
3481 #endif /* HPSA_DEBUG */
3482
3483 if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3484 dev_warn(&pdev->dev, "unable to get board into simple mode\n");
3485 err = -ENODEV;
3486 goto err_out_free_res;
3487 }
3488 return 0;
3489
3490 err_out_free_res:
3491 /*
3492 * Deliberately omit pci_disable_device(): it does something nasty to
3493 * Smart Array controllers that pci_enable_device does not undo
3494 */
3495 pci_release_regions(pdev);
3496 return err;
3497 }
3498
3499 static void __devinit hpsa_hba_inquiry(struct ctlr_info *h)
3500 {
3501 int rc;
3502
3503 #define HBA_INQUIRY_BYTE_COUNT 64
3504 h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
3505 if (!h->hba_inquiry_data)
3506 return;
3507 rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
3508 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
3509 if (rc != 0) {
3510 kfree(h->hba_inquiry_data);
3511 h->hba_inquiry_data = NULL;
3512 }
3513 }
3514
3515 static int __devinit hpsa_init_one(struct pci_dev *pdev,
3516 const struct pci_device_id *ent)
3517 {
3518 int i, rc;
3519 int dac;
3520 struct ctlr_info *h;
3521
3522 if (number_of_controllers == 0)
3523 printk(KERN_INFO DRIVER_NAME "\n");
3524 if (reset_devices) {
3525 /* Reset the controller with a PCI power-cycle */
3526 if (hpsa_hard_reset_controller(pdev) || hpsa_reset_msi(pdev))
3527 return -ENODEV;
3528
3529 /* Some devices (notably the HP Smart Array 5i Controller)
3530 need a little pause here */
3531 msleep(HPSA_POST_RESET_PAUSE_MSECS);
3532
3533 /* Now try to get the controller to respond to a no-op */
3534 for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
3535 if (hpsa_noop(pdev) == 0)
3536 break;
3537 else
3538 dev_warn(&pdev->dev, "no-op failed%s\n",
3539 (i < 11 ? "; re-trying" : ""));
3540 }
3541 }
3542
3543 /* Command structures must be aligned on a 32-byte boundary because
3544 * the 5 lower bits of the address are used by the hardware. and by
3545 * the driver. See comments in hpsa.h for more info.
3546 */
3547 #define COMMANDLIST_ALIGNMENT 32
3548 BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
3549 h = kzalloc(sizeof(*h), GFP_KERNEL);
3550 if (!h)
3551 return -ENOMEM;
3552
3553 h->busy_initializing = 1;
3554 INIT_HLIST_HEAD(&h->cmpQ);
3555 INIT_HLIST_HEAD(&h->reqQ);
3556 mutex_init(&h->busy_shutting_down);
3557 init_completion(&h->scan_wait);
3558 rc = hpsa_pci_init(h, pdev);
3559 if (rc != 0)
3560 goto clean1;
3561
3562 sprintf(h->devname, "hpsa%d", number_of_controllers);
3563 h->ctlr = number_of_controllers;
3564 number_of_controllers++;
3565 h->pdev = pdev;
3566
3567 /* configure PCI DMA stuff */
3568 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3569 if (rc == 0) {
3570 dac = 1;
3571 } else {
3572 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3573 if (rc == 0) {
3574 dac = 0;
3575 } else {
3576 dev_err(&pdev->dev, "no suitable DMA available\n");
3577 goto clean1;
3578 }
3579 }
3580
3581 /* make sure the board interrupts are off */
3582 h->access.set_intr_mask(h, HPSA_INTR_OFF);
3583 rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr,
3584 IRQF_DISABLED, h->devname, h);
3585 if (rc) {
3586 dev_err(&pdev->dev, "unable to get irq %d for %s\n",
3587 h->intr[PERF_MODE_INT], h->devname);
3588 goto clean2;
3589 }
3590
3591 dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
3592 h->devname, pdev->device,
3593 h->intr[PERF_MODE_INT], dac ? "" : " not");
3594
3595 h->cmd_pool_bits =
3596 kmalloc(((h->nr_cmds + BITS_PER_LONG -
3597 1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
3598 h->cmd_pool = pci_alloc_consistent(h->pdev,
3599 h->nr_cmds * sizeof(*h->cmd_pool),
3600 &(h->cmd_pool_dhandle));
3601 h->errinfo_pool = pci_alloc_consistent(h->pdev,
3602 h->nr_cmds * sizeof(*h->errinfo_pool),
3603 &(h->errinfo_pool_dhandle));
3604 if ((h->cmd_pool_bits == NULL)
3605 || (h->cmd_pool == NULL)
3606 || (h->errinfo_pool == NULL)) {
3607 dev_err(&pdev->dev, "out of memory");
3608 rc = -ENOMEM;
3609 goto clean4;
3610 }
3611 spin_lock_init(&h->lock);
3612 spin_lock_init(&h->scan_lock);
3613 init_waitqueue_head(&h->scan_wait_queue);
3614 h->scan_finished = 1; /* no scan currently in progress */
3615
3616 pci_set_drvdata(pdev, h);
3617 memset(h->cmd_pool_bits, 0,
3618 ((h->nr_cmds + BITS_PER_LONG -
3619 1) / BITS_PER_LONG) * sizeof(unsigned long));
3620
3621 hpsa_scsi_setup(h);
3622
3623 /* Turn the interrupts on so we can service requests */
3624 h->access.set_intr_mask(h, HPSA_INTR_ON);
3625
3626 hpsa_put_ctlr_into_performant_mode(h);
3627 hpsa_hba_inquiry(h);
3628 hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */
3629 h->busy_initializing = 0;
3630 return 1;
3631
3632 clean4:
3633 kfree(h->cmd_pool_bits);
3634 if (h->cmd_pool)
3635 pci_free_consistent(h->pdev,
3636 h->nr_cmds * sizeof(struct CommandList),
3637 h->cmd_pool, h->cmd_pool_dhandle);
3638 if (h->errinfo_pool)
3639 pci_free_consistent(h->pdev,
3640 h->nr_cmds * sizeof(struct ErrorInfo),
3641 h->errinfo_pool,
3642 h->errinfo_pool_dhandle);
3643 free_irq(h->intr[PERF_MODE_INT], h);
3644 clean2:
3645 clean1:
3646 h->busy_initializing = 0;
3647 kfree(h);
3648 return rc;
3649 }
3650
3651 static void hpsa_flush_cache(struct ctlr_info *h)
3652 {
3653 char *flush_buf;
3654 struct CommandList *c;
3655
3656 flush_buf = kzalloc(4, GFP_KERNEL);
3657 if (!flush_buf)
3658 return;
3659
3660 c = cmd_special_alloc(h);
3661 if (!c) {
3662 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
3663 goto out_of_memory;
3664 }
3665 fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
3666 RAID_CTLR_LUNID, TYPE_CMD);
3667 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
3668 if (c->err_info->CommandStatus != 0)
3669 dev_warn(&h->pdev->dev,
3670 "error flushing cache on controller\n");
3671 cmd_special_free(h, c);
3672 out_of_memory:
3673 kfree(flush_buf);
3674 }
3675
3676 static void hpsa_shutdown(struct pci_dev *pdev)
3677 {
3678 struct ctlr_info *h;
3679
3680 h = pci_get_drvdata(pdev);
3681 /* Turn board interrupts off and send the flush cache command
3682 * sendcmd will turn off interrupt, and send the flush...
3683 * To write all data in the battery backed cache to disks
3684 */
3685 hpsa_flush_cache(h);
3686 h->access.set_intr_mask(h, HPSA_INTR_OFF);
3687 free_irq(h->intr[PERF_MODE_INT], h);
3688 #ifdef CONFIG_PCI_MSI
3689 if (h->msix_vector)
3690 pci_disable_msix(h->pdev);
3691 else if (h->msi_vector)
3692 pci_disable_msi(h->pdev);
3693 #endif /* CONFIG_PCI_MSI */
3694 }
3695
3696 static void __devexit hpsa_remove_one(struct pci_dev *pdev)
3697 {
3698 struct ctlr_info *h;
3699
3700 if (pci_get_drvdata(pdev) == NULL) {
3701 dev_err(&pdev->dev, "unable to remove device \n");
3702 return;
3703 }
3704 h = pci_get_drvdata(pdev);
3705 mutex_lock(&h->busy_shutting_down);
3706 remove_from_scan_list(h);
3707 hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */
3708 hpsa_shutdown(pdev);
3709 iounmap(h->vaddr);
3710 pci_free_consistent(h->pdev,
3711 h->nr_cmds * sizeof(struct CommandList),
3712 h->cmd_pool, h->cmd_pool_dhandle);
3713 pci_free_consistent(h->pdev,
3714 h->nr_cmds * sizeof(struct ErrorInfo),
3715 h->errinfo_pool, h->errinfo_pool_dhandle);
3716 pci_free_consistent(h->pdev, h->reply_pool_size,
3717 h->reply_pool, h->reply_pool_dhandle);
3718 kfree(h->cmd_pool_bits);
3719 kfree(h->blockFetchTable);
3720 kfree(h->hba_inquiry_data);
3721 /*
3722 * Deliberately omit pci_disable_device(): it does something nasty to
3723 * Smart Array controllers that pci_enable_device does not undo
3724 */
3725 pci_release_regions(pdev);
3726 pci_set_drvdata(pdev, NULL);
3727 mutex_unlock(&h->busy_shutting_down);
3728 kfree(h);
3729 }
3730
3731 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
3732 __attribute__((unused)) pm_message_t state)
3733 {
3734 return -ENOSYS;
3735 }
3736
3737 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
3738 {
3739 return -ENOSYS;
3740 }
3741
3742 static struct pci_driver hpsa_pci_driver = {
3743 .name = "hpsa",
3744 .probe = hpsa_init_one,
3745 .remove = __devexit_p(hpsa_remove_one),
3746 .id_table = hpsa_pci_device_id, /* id_table */
3747 .shutdown = hpsa_shutdown,
3748 .suspend = hpsa_suspend,
3749 .resume = hpsa_resume,
3750 };
3751
3752 /* Fill in bucket_map[], given nsgs (the max number of
3753 * scatter gather elements supported) and bucket[],
3754 * which is an array of 8 integers. The bucket[] array
3755 * contains 8 different DMA transfer sizes (in 16
3756 * byte increments) which the controller uses to fetch
3757 * commands. This function fills in bucket_map[], which
3758 * maps a given number of scatter gather elements to one of
3759 * the 8 DMA transfer sizes. The point of it is to allow the
3760 * controller to only do as much DMA as needed to fetch the
3761 * command, with the DMA transfer size encoded in the lower
3762 * bits of the command address.
3763 */
3764 static void calc_bucket_map(int bucket[], int num_buckets,
3765 int nsgs, int *bucket_map)
3766 {
3767 int i, j, b, size;
3768
3769 /* even a command with 0 SGs requires 4 blocks */
3770 #define MINIMUM_TRANSFER_BLOCKS 4
3771 #define NUM_BUCKETS 8
3772 /* Note, bucket_map must have nsgs+1 entries. */
3773 for (i = 0; i <= nsgs; i++) {
3774 /* Compute size of a command with i SG entries */
3775 size = i + MINIMUM_TRANSFER_BLOCKS;
3776 b = num_buckets; /* Assume the biggest bucket */
3777 /* Find the bucket that is just big enough */
3778 for (j = 0; j < 8; j++) {
3779 if (bucket[j] >= size) {
3780 b = j;
3781 break;
3782 }
3783 }
3784 /* for a command with i SG entries, use bucket b. */
3785 bucket_map[i] = b;
3786 }
3787 }
3788
3789 static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
3790 {
3791 u32 trans_support;
3792 u64 trans_offset;
3793 /* 5 = 1 s/g entry or 4k
3794 * 6 = 2 s/g entry or 8k
3795 * 8 = 4 s/g entry or 16k
3796 * 10 = 6 s/g entry or 24k
3797 */
3798 int bft[8] = {5, 6, 8, 10, 12, 20, 28, 35}; /* for scatter/gathers */
3799 int i = 0;
3800 int l = 0;
3801 unsigned long register_value;
3802
3803 trans_support = readl(&(h->cfgtable->TransportSupport));
3804 if (!(trans_support & PERFORMANT_MODE))
3805 return;
3806
3807 h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3808 h->max_sg_entries = 32;
3809 /* Performant mode ring buffer and supporting data structures */
3810 h->reply_pool_size = h->max_commands * sizeof(u64);
3811 h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
3812 &(h->reply_pool_dhandle));
3813
3814 /* Need a block fetch table for performant mode */
3815 h->blockFetchTable = kmalloc(((h->max_sg_entries+1) *
3816 sizeof(u32)), GFP_KERNEL);
3817
3818 if ((h->reply_pool == NULL)
3819 || (h->blockFetchTable == NULL))
3820 goto clean_up;
3821
3822 h->reply_pool_wraparound = 1; /* spec: init to 1 */
3823
3824 /* Controller spec: zero out this buffer. */
3825 memset(h->reply_pool, 0, h->reply_pool_size);
3826 h->reply_pool_head = h->reply_pool;
3827
3828 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3829 bft[7] = h->max_sg_entries + 4;
3830 calc_bucket_map(bft, ARRAY_SIZE(bft), 32, h->blockFetchTable);
3831 for (i = 0; i < 8; i++)
3832 writel(bft[i], &h->transtable->BlockFetch[i]);
3833
3834 /* size of controller ring buffer */
3835 writel(h->max_commands, &h->transtable->RepQSize);
3836 writel(1, &h->transtable->RepQCount);
3837 writel(0, &h->transtable->RepQCtrAddrLow32);
3838 writel(0, &h->transtable->RepQCtrAddrHigh32);
3839 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3840 writel(0, &h->transtable->RepQAddr0High32);
3841 writel(CFGTBL_Trans_Performant,
3842 &(h->cfgtable->HostWrite.TransportRequest));
3843 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3844 /* under certain very rare conditions, this can take awhile.
3845 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3846 * as we enter this code.) */
3847 for (l = 0; l < MAX_CONFIG_WAIT; l++) {
3848 register_value = readl(h->vaddr + SA5_DOORBELL);
3849 if (!(register_value & CFGTBL_ChangeReq))
3850 break;
3851 /* delay and try again */
3852 set_current_state(TASK_INTERRUPTIBLE);
3853 schedule_timeout(10);
3854 }
3855 register_value = readl(&(h->cfgtable->TransportActive));
3856 if (!(register_value & CFGTBL_Trans_Performant)) {
3857 dev_warn(&h->pdev->dev, "unable to get board into"
3858 " performant mode\n");
3859 return;
3860 }
3861
3862 /* Change the access methods to the performant access methods */
3863 h->access = SA5_performant_access;
3864 h->transMethod = CFGTBL_Trans_Performant;
3865
3866 return;
3867
3868 clean_up:
3869 if (h->reply_pool)
3870 pci_free_consistent(h->pdev, h->reply_pool_size,
3871 h->reply_pool, h->reply_pool_dhandle);
3872 kfree(h->blockFetchTable);
3873 }
3874
3875 /*
3876 * This is it. Register the PCI driver information for the cards we control
3877 * the OS will call our registered routines when it finds one of our cards.
3878 */
3879 static int __init hpsa_init(void)
3880 {
3881 int err;
3882 /* Start the scan thread */
3883 hpsa_scan_thread = kthread_run(hpsa_scan_func, NULL, "hpsa_scan");
3884 if (IS_ERR(hpsa_scan_thread)) {
3885 err = PTR_ERR(hpsa_scan_thread);
3886 return -ENODEV;
3887 }
3888 err = pci_register_driver(&hpsa_pci_driver);
3889 if (err)
3890 kthread_stop(hpsa_scan_thread);
3891 return err;
3892 }
3893
3894 static void __exit hpsa_cleanup(void)
3895 {
3896 pci_unregister_driver(&hpsa_pci_driver);
3897 kthread_stop(hpsa_scan_thread);
3898 }
3899
3900 module_init(hpsa_init);
3901 module_exit(hpsa_cleanup);
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