blob: ba3deaddf150e4c4ee6eaeafa7aba1af6efa2a47 [file] [log] [blame]
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001/*
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 <linux/cciss_ioctl.h>
47#include <linux/string.h>
48#include <linux/bitmap.h>
49#include <asm/atomic.h>
50#include <linux/kthread.h>
51#include "hpsa_cmd.h"
52#include "hpsa.h"
53
54/* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
55#define HPSA_DRIVER_VERSION "1.0.0"
56#define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
57
58/* How long to wait (in milliseconds) for board to go into simple mode */
59#define MAX_CONFIG_WAIT 30000
60#define MAX_IOCTL_CONFIG_WAIT 1000
61
62/*define how many times we will try a command because of bus resets */
63#define MAX_CMD_RETRIES 3
64
65/* Embedded module documentation macros - see modules.h */
66MODULE_AUTHOR("Hewlett-Packard Company");
67MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
68 HPSA_DRIVER_VERSION);
69MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
70MODULE_VERSION(HPSA_DRIVER_VERSION);
71MODULE_LICENSE("GPL");
72
73static int hpsa_allow_any;
74module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
75MODULE_PARM_DESC(hpsa_allow_any,
76 "Allow hpsa driver to access unknown HP Smart Array hardware");
77
78/* define the PCI info for the cards we can control */
79static const struct pci_device_id hpsa_pci_device_id[] = {
80 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
81 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
82 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
83 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
84 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
85 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324a},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324b},
90 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
91 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
92 {0,}
93};
94
95MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
96
97/* board_id = Subsystem Device ID & Vendor ID
98 * product = Marketing Name for the board
99 * access = Address of the struct of function pointers
100 */
101static struct board_type products[] = {
102 {0x3223103C, "Smart Array P800", &SA5_access},
103 {0x3234103C, "Smart Array P400", &SA5_access},
104 {0x323d103c, "Smart Array P700M", &SA5_access},
105 {0x3241103C, "Smart Array P212", &SA5_access},
106 {0x3243103C, "Smart Array P410", &SA5_access},
107 {0x3245103C, "Smart Array P410i", &SA5_access},
108 {0x3247103C, "Smart Array P411", &SA5_access},
109 {0x3249103C, "Smart Array P812", &SA5_access},
110 {0x324a103C, "Smart Array P712m", &SA5_access},
111 {0x324b103C, "Smart Array P711m", &SA5_access},
112 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
113};
114
115static int number_of_controllers;
116
117static irqreturn_t do_hpsa_intr(int irq, void *dev_id);
118static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
119static void start_io(struct ctlr_info *h);
120
121#ifdef CONFIG_COMPAT
122static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
123#endif
124
125static void cmd_free(struct ctlr_info *h, struct CommandList *c);
126static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
127static struct CommandList *cmd_alloc(struct ctlr_info *h);
128static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -0600129static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
130 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
Stephen M. Cameronedd16362009-12-08 14:09:11 -0800131 int cmd_type);
132
133static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
134 void (*done)(struct scsi_cmnd *));
135
136static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
137static int hpsa_slave_alloc(struct scsi_device *sdev);
138static void hpsa_slave_destroy(struct scsi_device *sdev);
139
140static ssize_t raid_level_show(struct device *dev,
141 struct device_attribute *attr, char *buf);
142static ssize_t lunid_show(struct device *dev,
143 struct device_attribute *attr, char *buf);
144static ssize_t unique_id_show(struct device *dev,
145 struct device_attribute *attr, char *buf);
146static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
147static ssize_t host_store_rescan(struct device *dev,
148 struct device_attribute *attr, const char *buf, size_t count);
149static int check_for_unit_attention(struct ctlr_info *h,
150 struct CommandList *c);
151static void check_ioctl_unit_attention(struct ctlr_info *h,
152 struct CommandList *c);
153
154static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
155static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
156static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
157static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
158
159static struct device_attribute *hpsa_sdev_attrs[] = {
160 &dev_attr_raid_level,
161 &dev_attr_lunid,
162 &dev_attr_unique_id,
163 NULL,
164};
165
166static struct device_attribute *hpsa_shost_attrs[] = {
167 &dev_attr_rescan,
168 NULL,
169};
170
171static struct scsi_host_template hpsa_driver_template = {
172 .module = THIS_MODULE,
173 .name = "hpsa",
174 .proc_name = "hpsa",
175 .queuecommand = hpsa_scsi_queue_command,
176 .can_queue = 512,
177 .this_id = -1,
178 .sg_tablesize = MAXSGENTRIES,
179 .cmd_per_lun = 512,
180 .use_clustering = ENABLE_CLUSTERING,
181 .eh_device_reset_handler = hpsa_eh_device_reset_handler,
182 .ioctl = hpsa_ioctl,
183 .slave_alloc = hpsa_slave_alloc,
184 .slave_destroy = hpsa_slave_destroy,
185#ifdef CONFIG_COMPAT
186 .compat_ioctl = hpsa_compat_ioctl,
187#endif
188 .sdev_attrs = hpsa_sdev_attrs,
189 .shost_attrs = hpsa_shost_attrs,
190};
191
192static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
193{
194 unsigned long *priv = shost_priv(sdev->host);
195 return (struct ctlr_info *) *priv;
196}
197
198static struct task_struct *hpsa_scan_thread;
199static DEFINE_MUTEX(hpsa_scan_mutex);
200static LIST_HEAD(hpsa_scan_q);
201static int hpsa_scan_func(void *data);
202
203/**
204 * add_to_scan_list() - add controller to rescan queue
205 * @h: Pointer to the controller.
206 *
207 * Adds the controller to the rescan queue if not already on the queue.
208 *
209 * returns 1 if added to the queue, 0 if skipped (could be on the
210 * queue already, or the controller could be initializing or shutting
211 * down).
212 **/
213static int add_to_scan_list(struct ctlr_info *h)
214{
215 struct ctlr_info *test_h;
216 int found = 0;
217 int ret = 0;
218
219 if (h->busy_initializing)
220 return 0;
221
222 /*
223 * If we don't get the lock, it means the driver is unloading
224 * and there's no point in scheduling a new scan.
225 */
226 if (!mutex_trylock(&h->busy_shutting_down))
227 return 0;
228
229 mutex_lock(&hpsa_scan_mutex);
230 list_for_each_entry(test_h, &hpsa_scan_q, scan_list) {
231 if (test_h == h) {
232 found = 1;
233 break;
234 }
235 }
236 if (!found && !h->busy_scanning) {
237 INIT_COMPLETION(h->scan_wait);
238 list_add_tail(&h->scan_list, &hpsa_scan_q);
239 ret = 1;
240 }
241 mutex_unlock(&hpsa_scan_mutex);
242 mutex_unlock(&h->busy_shutting_down);
243
244 return ret;
245}
246
247/**
248 * remove_from_scan_list() - remove controller from rescan queue
249 * @h: Pointer to the controller.
250 *
251 * Removes the controller from the rescan queue if present. Blocks if
252 * the controller is currently conducting a rescan. The controller
253 * can be in one of three states:
254 * 1. Doesn't need a scan
255 * 2. On the scan list, but not scanning yet (we remove it)
256 * 3. Busy scanning (and not on the list). In this case we want to wait for
257 * the scan to complete to make sure the scanning thread for this
258 * controller is completely idle.
259 **/
260static void remove_from_scan_list(struct ctlr_info *h)
261{
262 struct ctlr_info *test_h, *tmp_h;
263
264 mutex_lock(&hpsa_scan_mutex);
265 list_for_each_entry_safe(test_h, tmp_h, &hpsa_scan_q, scan_list) {
266 if (test_h == h) { /* state 2. */
267 list_del(&h->scan_list);
268 complete_all(&h->scan_wait);
269 mutex_unlock(&hpsa_scan_mutex);
270 return;
271 }
272 }
273 if (h->busy_scanning) { /* state 3. */
274 mutex_unlock(&hpsa_scan_mutex);
275 wait_for_completion(&h->scan_wait);
276 } else { /* state 1, nothing to do. */
277 mutex_unlock(&hpsa_scan_mutex);
278 }
279}
280
281/* hpsa_scan_func() - kernel thread used to rescan controllers
282 * @data: Ignored.
283 *
284 * A kernel thread used scan for drive topology changes on
285 * controllers. The thread processes only one controller at a time
286 * using a queue. Controllers are added to the queue using
287 * add_to_scan_list() and removed from the queue either after done
288 * processing or using remove_from_scan_list().
289 *
290 * returns 0.
291 **/
292static int hpsa_scan_func(__attribute__((unused)) void *data)
293{
294 struct ctlr_info *h;
295 int host_no;
296
297 while (1) {
298 set_current_state(TASK_INTERRUPTIBLE);
299 schedule();
300 if (kthread_should_stop())
301 break;
302
303 while (1) {
304 mutex_lock(&hpsa_scan_mutex);
305 if (list_empty(&hpsa_scan_q)) {
306 mutex_unlock(&hpsa_scan_mutex);
307 break;
308 }
309 h = list_entry(hpsa_scan_q.next, struct ctlr_info,
310 scan_list);
311 list_del(&h->scan_list);
312 h->busy_scanning = 1;
313 mutex_unlock(&hpsa_scan_mutex);
314 host_no = h->scsi_host ? h->scsi_host->host_no : -1;
315 hpsa_update_scsi_devices(h, host_no);
316 complete_all(&h->scan_wait);
317 mutex_lock(&hpsa_scan_mutex);
318 h->busy_scanning = 0;
319 mutex_unlock(&hpsa_scan_mutex);
320 }
321 }
322 return 0;
323}
324
325static int check_for_unit_attention(struct ctlr_info *h,
326 struct CommandList *c)
327{
328 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
329 return 0;
330
331 switch (c->err_info->SenseInfo[12]) {
332 case STATE_CHANGED:
333 dev_warn(&h->pdev->dev, "hpsa%d: a state change "
334 "detected, command retried\n", h->ctlr);
335 break;
336 case LUN_FAILED:
337 dev_warn(&h->pdev->dev, "hpsa%d: LUN failure "
338 "detected, action required\n", h->ctlr);
339 break;
340 case REPORT_LUNS_CHANGED:
341 dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
342 "changed\n", h->ctlr);
343 /*
344 * Here, we could call add_to_scan_list and wake up the scan thread,
345 * except that it's quite likely that we will get more than one
346 * REPORT_LUNS_CHANGED condition in quick succession, which means
347 * that those which occur after the first one will likely happen
348 * *during* the hpsa_scan_thread's rescan. And the rescan code is not
349 * robust enough to restart in the middle, undoing what it has already
350 * done, and it's not clear that it's even possible to do this, since
351 * part of what it does is notify the SCSI mid layer, which starts
352 * doing it's own i/o to read partition tables and so on, and the
353 * driver doesn't have visibility to know what might need undoing.
354 * In any event, if possible, it is horribly complicated to get right
355 * so we just don't do it for now.
356 *
357 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
358 */
359 break;
360 case POWER_OR_RESET:
361 dev_warn(&h->pdev->dev, "hpsa%d: a power on "
362 "or device reset detected\n", h->ctlr);
363 break;
364 case UNIT_ATTENTION_CLEARED:
365 dev_warn(&h->pdev->dev, "hpsa%d: unit attention "
366 "cleared by another initiator\n", h->ctlr);
367 break;
368 default:
369 dev_warn(&h->pdev->dev, "hpsa%d: unknown "
370 "unit attention detected\n", h->ctlr);
371 break;
372 }
373 return 1;
374}
375
376static ssize_t host_store_rescan(struct device *dev,
377 struct device_attribute *attr,
378 const char *buf, size_t count)
379{
380 struct ctlr_info *h;
381 struct Scsi_Host *shost = class_to_shost(dev);
382 unsigned long *priv = shost_priv(shost);
383 h = (struct ctlr_info *) *priv;
384 if (add_to_scan_list(h)) {
385 wake_up_process(hpsa_scan_thread);
386 wait_for_completion_interruptible(&h->scan_wait);
387 }
388 return count;
389}
390
391/* Enqueuing and dequeuing functions for cmdlists. */
392static inline void addQ(struct hlist_head *list, struct CommandList *c)
393{
394 hlist_add_head(&c->list, list);
395}
396
397static void enqueue_cmd_and_start_io(struct ctlr_info *h,
398 struct CommandList *c)
399{
400 unsigned long flags;
401 spin_lock_irqsave(&h->lock, flags);
402 addQ(&h->reqQ, c);
403 h->Qdepth++;
404 start_io(h);
405 spin_unlock_irqrestore(&h->lock, flags);
406}
407
408static inline void removeQ(struct CommandList *c)
409{
410 if (WARN_ON(hlist_unhashed(&c->list)))
411 return;
412 hlist_del_init(&c->list);
413}
414
415static inline int is_hba_lunid(unsigned char scsi3addr[])
416{
417 return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
418}
419
420static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
421{
422 return (scsi3addr[3] & 0xC0) == 0x40;
423}
424
425static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
426 "UNKNOWN"
427};
428#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
429
430static ssize_t raid_level_show(struct device *dev,
431 struct device_attribute *attr, char *buf)
432{
433 ssize_t l = 0;
Stephen M. Cameron82a72c02010-02-04 08:41:38 -0600434 unsigned char rlevel;
Stephen M. Cameronedd16362009-12-08 14:09:11 -0800435 struct ctlr_info *h;
436 struct scsi_device *sdev;
437 struct hpsa_scsi_dev_t *hdev;
438 unsigned long flags;
439
440 sdev = to_scsi_device(dev);
441 h = sdev_to_hba(sdev);
442 spin_lock_irqsave(&h->lock, flags);
443 hdev = sdev->hostdata;
444 if (!hdev) {
445 spin_unlock_irqrestore(&h->lock, flags);
446 return -ENODEV;
447 }
448
449 /* Is this even a logical drive? */
450 if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
451 spin_unlock_irqrestore(&h->lock, flags);
452 l = snprintf(buf, PAGE_SIZE, "N/A\n");
453 return l;
454 }
455
456 rlevel = hdev->raid_level;
457 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameron82a72c02010-02-04 08:41:38 -0600458 if (rlevel > RAID_UNKNOWN)
Stephen M. Cameronedd16362009-12-08 14:09:11 -0800459 rlevel = RAID_UNKNOWN;
460 l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
461 return l;
462}
463
464static ssize_t lunid_show(struct device *dev,
465 struct device_attribute *attr, char *buf)
466{
467 struct ctlr_info *h;
468 struct scsi_device *sdev;
469 struct hpsa_scsi_dev_t *hdev;
470 unsigned long flags;
471 unsigned char lunid[8];
472
473 sdev = to_scsi_device(dev);
474 h = sdev_to_hba(sdev);
475 spin_lock_irqsave(&h->lock, flags);
476 hdev = sdev->hostdata;
477 if (!hdev) {
478 spin_unlock_irqrestore(&h->lock, flags);
479 return -ENODEV;
480 }
481 memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
482 spin_unlock_irqrestore(&h->lock, flags);
483 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
484 lunid[0], lunid[1], lunid[2], lunid[3],
485 lunid[4], lunid[5], lunid[6], lunid[7]);
486}
487
488static ssize_t unique_id_show(struct device *dev,
489 struct device_attribute *attr, char *buf)
490{
491 struct ctlr_info *h;
492 struct scsi_device *sdev;
493 struct hpsa_scsi_dev_t *hdev;
494 unsigned long flags;
495 unsigned char sn[16];
496
497 sdev = to_scsi_device(dev);
498 h = sdev_to_hba(sdev);
499 spin_lock_irqsave(&h->lock, flags);
500 hdev = sdev->hostdata;
501 if (!hdev) {
502 spin_unlock_irqrestore(&h->lock, flags);
503 return -ENODEV;
504 }
505 memcpy(sn, hdev->device_id, sizeof(sn));
506 spin_unlock_irqrestore(&h->lock, flags);
507 return snprintf(buf, 16 * 2 + 2,
508 "%02X%02X%02X%02X%02X%02X%02X%02X"
509 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
510 sn[0], sn[1], sn[2], sn[3],
511 sn[4], sn[5], sn[6], sn[7],
512 sn[8], sn[9], sn[10], sn[11],
513 sn[12], sn[13], sn[14], sn[15]);
514}
515
516static int hpsa_find_target_lun(struct ctlr_info *h,
517 unsigned char scsi3addr[], int bus, int *target, int *lun)
518{
519 /* finds an unused bus, target, lun for a new physical device
520 * assumes h->devlock is held
521 */
522 int i, found = 0;
523 DECLARE_BITMAP(lun_taken, HPSA_MAX_SCSI_DEVS_PER_HBA);
524
525 memset(&lun_taken[0], 0, HPSA_MAX_SCSI_DEVS_PER_HBA >> 3);
526
527 for (i = 0; i < h->ndevices; i++) {
528 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
529 set_bit(h->dev[i]->target, lun_taken);
530 }
531
532 for (i = 0; i < HPSA_MAX_SCSI_DEVS_PER_HBA; i++) {
533 if (!test_bit(i, lun_taken)) {
534 /* *bus = 1; */
535 *target = i;
536 *lun = 0;
537 found = 1;
538 break;
539 }
540 }
541 return !found;
542}
543
544/* Add an entry into h->dev[] array. */
545static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
546 struct hpsa_scsi_dev_t *device,
547 struct hpsa_scsi_dev_t *added[], int *nadded)
548{
549 /* assumes h->devlock is held */
550 int n = h->ndevices;
551 int i;
552 unsigned char addr1[8], addr2[8];
553 struct hpsa_scsi_dev_t *sd;
554
555 if (n >= HPSA_MAX_SCSI_DEVS_PER_HBA) {
556 dev_err(&h->pdev->dev, "too many devices, some will be "
557 "inaccessible.\n");
558 return -1;
559 }
560
561 /* physical devices do not have lun or target assigned until now. */
562 if (device->lun != -1)
563 /* Logical device, lun is already assigned. */
564 goto lun_assigned;
565
566 /* If this device a non-zero lun of a multi-lun device
567 * byte 4 of the 8-byte LUN addr will contain the logical
568 * unit no, zero otherise.
569 */
570 if (device->scsi3addr[4] == 0) {
571 /* This is not a non-zero lun of a multi-lun device */
572 if (hpsa_find_target_lun(h, device->scsi3addr,
573 device->bus, &device->target, &device->lun) != 0)
574 return -1;
575 goto lun_assigned;
576 }
577
578 /* This is a non-zero lun of a multi-lun device.
579 * Search through our list and find the device which
580 * has the same 8 byte LUN address, excepting byte 4.
581 * Assign the same bus and target for this new LUN.
582 * Use the logical unit number from the firmware.
583 */
584 memcpy(addr1, device->scsi3addr, 8);
585 addr1[4] = 0;
586 for (i = 0; i < n; i++) {
587 sd = h->dev[i];
588 memcpy(addr2, sd->scsi3addr, 8);
589 addr2[4] = 0;
590 /* differ only in byte 4? */
591 if (memcmp(addr1, addr2, 8) == 0) {
592 device->bus = sd->bus;
593 device->target = sd->target;
594 device->lun = device->scsi3addr[4];
595 break;
596 }
597 }
598 if (device->lun == -1) {
599 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
600 " suspect firmware bug or unsupported hardware "
601 "configuration.\n");
602 return -1;
603 }
604
605lun_assigned:
606
607 h->dev[n] = device;
608 h->ndevices++;
609 added[*nadded] = device;
610 (*nadded)++;
611
612 /* initially, (before registering with scsi layer) we don't
613 * know our hostno and we don't want to print anything first
614 * time anyway (the scsi layer's inquiries will show that info)
615 */
616 /* if (hostno != -1) */
617 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
618 scsi_device_type(device->devtype), hostno,
619 device->bus, device->target, device->lun);
620 return 0;
621}
622
623/* Remove an entry from h->dev[] array. */
624static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
625 struct hpsa_scsi_dev_t *removed[], int *nremoved)
626{
627 /* assumes h->devlock is held */
628 int i;
629 struct hpsa_scsi_dev_t *sd;
630
Stephen M. Cameronb2ed4f72010-02-04 08:41:44 -0600631 BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
Stephen M. Cameronedd16362009-12-08 14:09:11 -0800632
633 sd = h->dev[entry];
634 removed[*nremoved] = h->dev[entry];
635 (*nremoved)++;
636
637 for (i = entry; i < h->ndevices-1; i++)
638 h->dev[i] = h->dev[i+1];
639 h->ndevices--;
640 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
641 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
642 sd->lun);
643}
644
645#define SCSI3ADDR_EQ(a, b) ( \
646 (a)[7] == (b)[7] && \
647 (a)[6] == (b)[6] && \
648 (a)[5] == (b)[5] && \
649 (a)[4] == (b)[4] && \
650 (a)[3] == (b)[3] && \
651 (a)[2] == (b)[2] && \
652 (a)[1] == (b)[1] && \
653 (a)[0] == (b)[0])
654
655static void fixup_botched_add(struct ctlr_info *h,
656 struct hpsa_scsi_dev_t *added)
657{
658 /* called when scsi_add_device fails in order to re-adjust
659 * h->dev[] to match the mid layer's view.
660 */
661 unsigned long flags;
662 int i, j;
663
664 spin_lock_irqsave(&h->lock, flags);
665 for (i = 0; i < h->ndevices; i++) {
666 if (h->dev[i] == added) {
667 for (j = i; j < h->ndevices-1; j++)
668 h->dev[j] = h->dev[j+1];
669 h->ndevices--;
670 break;
671 }
672 }
673 spin_unlock_irqrestore(&h->lock, flags);
674 kfree(added);
675}
676
677static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
678 struct hpsa_scsi_dev_t *dev2)
679{
680 if ((is_logical_dev_addr_mode(dev1->scsi3addr) ||
681 (dev1->lun != -1 && dev2->lun != -1)) &&
682 dev1->devtype != 0x0C)
683 return (memcmp(dev1, dev2, sizeof(*dev1)) == 0);
684
685 /* we compare everything except lun and target as these
686 * are not yet assigned. Compare parts likely
687 * to differ first
688 */
689 if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
690 sizeof(dev1->scsi3addr)) != 0)
691 return 0;
692 if (memcmp(dev1->device_id, dev2->device_id,
693 sizeof(dev1->device_id)) != 0)
694 return 0;
695 if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
696 return 0;
697 if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
698 return 0;
699 if (memcmp(dev1->revision, dev2->revision, sizeof(dev1->revision)) != 0)
700 return 0;
701 if (dev1->devtype != dev2->devtype)
702 return 0;
703 if (dev1->raid_level != dev2->raid_level)
704 return 0;
705 if (dev1->bus != dev2->bus)
706 return 0;
707 return 1;
708}
709
710/* Find needle in haystack. If exact match found, return DEVICE_SAME,
711 * and return needle location in *index. If scsi3addr matches, but not
712 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
713 * location in *index. If needle not found, return DEVICE_NOT_FOUND.
714 */
715static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
716 struct hpsa_scsi_dev_t *haystack[], int haystack_size,
717 int *index)
718{
719 int i;
720#define DEVICE_NOT_FOUND 0
721#define DEVICE_CHANGED 1
722#define DEVICE_SAME 2
723 for (i = 0; i < haystack_size; i++) {
724 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
725 *index = i;
726 if (device_is_the_same(needle, haystack[i]))
727 return DEVICE_SAME;
728 else
729 return DEVICE_CHANGED;
730 }
731 }
732 *index = -1;
733 return DEVICE_NOT_FOUND;
734}
735
Stephen M. Cameron4967bd32010-02-04 08:41:49 -0600736static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
Stephen M. Cameronedd16362009-12-08 14:09:11 -0800737 struct hpsa_scsi_dev_t *sd[], int nsds)
738{
739 /* sd contains scsi3 addresses and devtypes, and inquiry
740 * data. This function takes what's in sd to be the current
741 * reality and updates h->dev[] to reflect that reality.
742 */
743 int i, entry, device_change, changes = 0;
744 struct hpsa_scsi_dev_t *csd;
745 unsigned long flags;
746 struct hpsa_scsi_dev_t **added, **removed;
747 int nadded, nremoved;
748 struct Scsi_Host *sh = NULL;
749
750 added = kzalloc(sizeof(*added) * HPSA_MAX_SCSI_DEVS_PER_HBA,
751 GFP_KERNEL);
752 removed = kzalloc(sizeof(*removed) * HPSA_MAX_SCSI_DEVS_PER_HBA,
753 GFP_KERNEL);
754
755 if (!added || !removed) {
756 dev_warn(&h->pdev->dev, "out of memory in "
757 "adjust_hpsa_scsi_table\n");
758 goto free_and_out;
759 }
760
761 spin_lock_irqsave(&h->devlock, flags);
762
763 /* find any devices in h->dev[] that are not in
764 * sd[] and remove them from h->dev[], and for any
765 * devices which have changed, remove the old device
766 * info and add the new device info.
767 */
768 i = 0;
769 nremoved = 0;
770 nadded = 0;
771 while (i < h->ndevices) {
772 csd = h->dev[i];
773 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
774 if (device_change == DEVICE_NOT_FOUND) {
775 changes++;
776 hpsa_scsi_remove_entry(h, hostno, i,
777 removed, &nremoved);
778 continue; /* remove ^^^, hence i not incremented */
779 } else if (device_change == DEVICE_CHANGED) {
780 changes++;
781 hpsa_scsi_remove_entry(h, hostno, i,
782 removed, &nremoved);
783 (void) hpsa_scsi_add_entry(h, hostno, sd[entry],
784 added, &nadded);
785 /* add can't fail, we just removed one. */
786 sd[entry] = NULL; /* prevent it from being freed */
787 }
788 i++;
789 }
790
791 /* Now, make sure every device listed in sd[] is also
792 * listed in h->dev[], adding them if they aren't found
793 */
794
795 for (i = 0; i < nsds; i++) {
796 if (!sd[i]) /* if already added above. */
797 continue;
798 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
799 h->ndevices, &entry);
800 if (device_change == DEVICE_NOT_FOUND) {
801 changes++;
802 if (hpsa_scsi_add_entry(h, hostno, sd[i],
803 added, &nadded) != 0)
804 break;
805 sd[i] = NULL; /* prevent from being freed later. */
806 } else if (device_change == DEVICE_CHANGED) {
807 /* should never happen... */
808 changes++;
809 dev_warn(&h->pdev->dev,
810 "device unexpectedly changed.\n");
811 /* but if it does happen, we just ignore that device */
812 }
813 }
814 spin_unlock_irqrestore(&h->devlock, flags);
815
816 /* Don't notify scsi mid layer of any changes the first time through
817 * (or if there are no changes) scsi_scan_host will do it later the
818 * first time through.
819 */
820 if (hostno == -1 || !changes)
821 goto free_and_out;
822
823 sh = h->scsi_host;
824 /* Notify scsi mid layer of any removed devices */
825 for (i = 0; i < nremoved; i++) {
826 struct scsi_device *sdev =
827 scsi_device_lookup(sh, removed[i]->bus,
828 removed[i]->target, removed[i]->lun);
829 if (sdev != NULL) {
830 scsi_remove_device(sdev);
831 scsi_device_put(sdev);
832 } else {
833 /* We don't expect to get here.
834 * future cmds to this device will get selection
835 * timeout as if the device was gone.
836 */
837 dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
838 " for removal.", hostno, removed[i]->bus,
839 removed[i]->target, removed[i]->lun);
840 }
841 kfree(removed[i]);
842 removed[i] = NULL;
843 }
844
845 /* Notify scsi mid layer of any added devices */
846 for (i = 0; i < nadded; i++) {
847 if (scsi_add_device(sh, added[i]->bus,
848 added[i]->target, added[i]->lun) == 0)
849 continue;
850 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
851 "device not added.\n", hostno, added[i]->bus,
852 added[i]->target, added[i]->lun);
853 /* now we have to remove it from h->dev,
854 * since it didn't get added to scsi mid layer
855 */
856 fixup_botched_add(h, added[i]);
857 }
858
859free_and_out:
860 kfree(added);
861 kfree(removed);
Stephen M. Cameronedd16362009-12-08 14:09:11 -0800862}
863
864/*
865 * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
866 * Assume's h->devlock is held.
867 */
868static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
869 int bus, int target, int lun)
870{
871 int i;
872 struct hpsa_scsi_dev_t *sd;
873
874 for (i = 0; i < h->ndevices; i++) {
875 sd = h->dev[i];
876 if (sd->bus == bus && sd->target == target && sd->lun == lun)
877 return sd;
878 }
879 return NULL;
880}
881
882/* link sdev->hostdata to our per-device structure. */
883static int hpsa_slave_alloc(struct scsi_device *sdev)
884{
885 struct hpsa_scsi_dev_t *sd;
886 unsigned long flags;
887 struct ctlr_info *h;
888
889 h = sdev_to_hba(sdev);
890 spin_lock_irqsave(&h->devlock, flags);
891 sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
892 sdev_id(sdev), sdev->lun);
893 if (sd != NULL)
894 sdev->hostdata = sd;
895 spin_unlock_irqrestore(&h->devlock, flags);
896 return 0;
897}
898
899static void hpsa_slave_destroy(struct scsi_device *sdev)
900{
Stephen M. Cameronbcc44252010-02-04 08:41:54 -0600901 /* nothing to do. */
Stephen M. Cameronedd16362009-12-08 14:09:11 -0800902}
903
904static void hpsa_scsi_setup(struct ctlr_info *h)
905{
906 h->ndevices = 0;
907 h->scsi_host = NULL;
908 spin_lock_init(&h->devlock);
Stephen M. Cameronedd16362009-12-08 14:09:11 -0800909}
910
911static void complete_scsi_command(struct CommandList *cp,
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -0600912 int timeout, u32 tag)
Stephen M. Cameronedd16362009-12-08 14:09:11 -0800913{
914 struct scsi_cmnd *cmd;
915 struct ctlr_info *h;
916 struct ErrorInfo *ei;
917
918 unsigned char sense_key;
919 unsigned char asc; /* additional sense code */
920 unsigned char ascq; /* additional sense code qualifier */
921
922 ei = cp->err_info;
923 cmd = (struct scsi_cmnd *) cp->scsi_cmd;
924 h = cp->h;
925
926 scsi_dma_unmap(cmd); /* undo the DMA mappings */
927
928 cmd->result = (DID_OK << 16); /* host byte */
929 cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
930 cmd->result |= (ei->ScsiStatus << 1);
931
932 /* copy the sense data whether we need to or not. */
933 memcpy(cmd->sense_buffer, ei->SenseInfo,
934 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
935 SCSI_SENSE_BUFFERSIZE :
936 ei->SenseLen);
937 scsi_set_resid(cmd, ei->ResidualCnt);
938
939 if (ei->CommandStatus == 0) {
940 cmd->scsi_done(cmd);
941 cmd_free(h, cp);
942 return;
943 }
944
945 /* an error has occurred */
946 switch (ei->CommandStatus) {
947
948 case CMD_TARGET_STATUS:
949 if (ei->ScsiStatus) {
950 /* Get sense key */
951 sense_key = 0xf & ei->SenseInfo[2];
952 /* Get additional sense code */
953 asc = ei->SenseInfo[12];
954 /* Get addition sense code qualifier */
955 ascq = ei->SenseInfo[13];
956 }
957
958 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
959 if (check_for_unit_attention(h, cp)) {
960 cmd->result = DID_SOFT_ERROR << 16;
961 break;
962 }
963 if (sense_key == ILLEGAL_REQUEST) {
964 /*
965 * SCSI REPORT_LUNS is commonly unsupported on
966 * Smart Array. Suppress noisy complaint.
967 */
968 if (cp->Request.CDB[0] == REPORT_LUNS)
969 break;
970
971 /* If ASC/ASCQ indicate Logical Unit
972 * Not Supported condition,
973 */
974 if ((asc == 0x25) && (ascq == 0x0)) {
975 dev_warn(&h->pdev->dev, "cp %p "
976 "has check condition\n", cp);
977 break;
978 }
979 }
980
981 if (sense_key == NOT_READY) {
982 /* If Sense is Not Ready, Logical Unit
983 * Not ready, Manual Intervention
984 * required
985 */
986 if ((asc == 0x04) && (ascq == 0x03)) {
987 cmd->result = DID_NO_CONNECT << 16;
988 dev_warn(&h->pdev->dev, "cp %p "
989 "has check condition: unit "
990 "not ready, manual "
991 "intervention required\n", cp);
992 break;
993 }
994 }
995
996
997 /* Must be some other type of check condition */
998 dev_warn(&h->pdev->dev, "cp %p has check condition: "
999 "unknown type: "
1000 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1001 "Returning result: 0x%x, "
1002 "cmd=[%02x %02x %02x %02x %02x "
1003 "%02x %02x %02x %02x %02x]\n",
1004 cp, sense_key, asc, ascq,
1005 cmd->result,
1006 cmd->cmnd[0], cmd->cmnd[1],
1007 cmd->cmnd[2], cmd->cmnd[3],
1008 cmd->cmnd[4], cmd->cmnd[5],
1009 cmd->cmnd[6], cmd->cmnd[7],
1010 cmd->cmnd[8], cmd->cmnd[9]);
1011 break;
1012 }
1013
1014
1015 /* Problem was not a check condition
1016 * Pass it up to the upper layers...
1017 */
1018 if (ei->ScsiStatus) {
1019 dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1020 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1021 "Returning result: 0x%x\n",
1022 cp, ei->ScsiStatus,
1023 sense_key, asc, ascq,
1024 cmd->result);
1025 } else { /* scsi status is zero??? How??? */
1026 dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1027 "Returning no connection.\n", cp),
1028
1029 /* Ordinarily, this case should never happen,
1030 * but there is a bug in some released firmware
1031 * revisions that allows it to happen if, for
1032 * example, a 4100 backplane loses power and
1033 * the tape drive is in it. We assume that
1034 * it's a fatal error of some kind because we
1035 * can't show that it wasn't. We will make it
1036 * look like selection timeout since that is
1037 * the most common reason for this to occur,
1038 * and it's severe enough.
1039 */
1040
1041 cmd->result = DID_NO_CONNECT << 16;
1042 }
1043 break;
1044
1045 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1046 break;
1047 case CMD_DATA_OVERRUN:
1048 dev_warn(&h->pdev->dev, "cp %p has"
1049 " completed with data overrun "
1050 "reported\n", cp);
1051 break;
1052 case CMD_INVALID: {
1053 /* print_bytes(cp, sizeof(*cp), 1, 0);
1054 print_cmd(cp); */
1055 /* We get CMD_INVALID if you address a non-existent device
1056 * instead of a selection timeout (no response). You will
1057 * see this if you yank out a drive, then try to access it.
1058 * This is kind of a shame because it means that any other
1059 * CMD_INVALID (e.g. driver bug) will get interpreted as a
1060 * missing target. */
1061 cmd->result = DID_NO_CONNECT << 16;
1062 }
1063 break;
1064 case CMD_PROTOCOL_ERR:
1065 dev_warn(&h->pdev->dev, "cp %p has "
1066 "protocol error \n", cp);
1067 break;
1068 case CMD_HARDWARE_ERR:
1069 cmd->result = DID_ERROR << 16;
1070 dev_warn(&h->pdev->dev, "cp %p had hardware error\n", cp);
1071 break;
1072 case CMD_CONNECTION_LOST:
1073 cmd->result = DID_ERROR << 16;
1074 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1075 break;
1076 case CMD_ABORTED:
1077 cmd->result = DID_ABORT << 16;
1078 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1079 cp, ei->ScsiStatus);
1080 break;
1081 case CMD_ABORT_FAILED:
1082 cmd->result = DID_ERROR << 16;
1083 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1084 break;
1085 case CMD_UNSOLICITED_ABORT:
1086 cmd->result = DID_ABORT << 16;
1087 dev_warn(&h->pdev->dev, "cp %p aborted do to an unsolicited "
1088 "abort\n", cp);
1089 break;
1090 case CMD_TIMEOUT:
1091 cmd->result = DID_TIME_OUT << 16;
1092 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1093 break;
1094 default:
1095 cmd->result = DID_ERROR << 16;
1096 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1097 cp, ei->CommandStatus);
1098 }
1099 cmd->scsi_done(cmd);
1100 cmd_free(h, cp);
1101}
1102
1103static int hpsa_scsi_detect(struct ctlr_info *h)
1104{
1105 struct Scsi_Host *sh;
1106 int error;
1107
1108 sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
1109 if (sh == NULL)
1110 goto fail;
1111
1112 sh->io_port = 0;
1113 sh->n_io_port = 0;
1114 sh->this_id = -1;
1115 sh->max_channel = 3;
1116 sh->max_cmd_len = MAX_COMMAND_SIZE;
1117 sh->max_lun = HPSA_MAX_LUN;
1118 sh->max_id = HPSA_MAX_LUN;
1119 h->scsi_host = sh;
1120 sh->hostdata[0] = (unsigned long) h;
1121 sh->irq = h->intr[SIMPLE_MODE_INT];
1122 sh->unique_id = sh->irq;
1123 error = scsi_add_host(sh, &h->pdev->dev);
1124 if (error)
1125 goto fail_host_put;
1126 scsi_scan_host(sh);
1127 return 0;
1128
1129 fail_host_put:
1130 dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_add_host"
1131 " failed for controller %d\n", h->ctlr);
1132 scsi_host_put(sh);
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06001133 return error;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001134 fail:
1135 dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc"
1136 " failed for controller %d\n", h->ctlr);
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06001137 return -ENOMEM;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001138}
1139
1140static void hpsa_pci_unmap(struct pci_dev *pdev,
1141 struct CommandList *c, int sg_used, int data_direction)
1142{
1143 int i;
1144 union u64bit addr64;
1145
1146 for (i = 0; i < sg_used; i++) {
1147 addr64.val32.lower = c->SG[i].Addr.lower;
1148 addr64.val32.upper = c->SG[i].Addr.upper;
1149 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1150 data_direction);
1151 }
1152}
1153
1154static void hpsa_map_one(struct pci_dev *pdev,
1155 struct CommandList *cp,
1156 unsigned char *buf,
1157 size_t buflen,
1158 int data_direction)
1159{
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001160 u64 addr64;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001161
1162 if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1163 cp->Header.SGList = 0;
1164 cp->Header.SGTotal = 0;
1165 return;
1166 }
1167
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001168 addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001169 cp->SG[0].Addr.lower =
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001170 (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001171 cp->SG[0].Addr.upper =
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001172 (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001173 cp->SG[0].Len = buflen;
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001174 cp->Header.SGList = (u8) 1; /* no. SGs contig in this cmd */
1175 cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001176}
1177
1178static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1179 struct CommandList *c)
1180{
1181 DECLARE_COMPLETION_ONSTACK(wait);
1182
1183 c->waiting = &wait;
1184 enqueue_cmd_and_start_io(h, c);
1185 wait_for_completion(&wait);
1186}
1187
1188static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1189 struct CommandList *c, int data_direction)
1190{
1191 int retry_count = 0;
1192
1193 do {
1194 memset(c->err_info, 0, sizeof(c->err_info));
1195 hpsa_scsi_do_simple_cmd_core(h, c);
1196 retry_count++;
1197 } while (check_for_unit_attention(h, c) && retry_count <= 3);
1198 hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1199}
1200
1201static void hpsa_scsi_interpret_error(struct CommandList *cp)
1202{
1203 struct ErrorInfo *ei;
1204 struct device *d = &cp->h->pdev->dev;
1205
1206 ei = cp->err_info;
1207 switch (ei->CommandStatus) {
1208 case CMD_TARGET_STATUS:
1209 dev_warn(d, "cmd %p has completed with errors\n", cp);
1210 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1211 ei->ScsiStatus);
1212 if (ei->ScsiStatus == 0)
1213 dev_warn(d, "SCSI status is abnormally zero. "
1214 "(probably indicates selection timeout "
1215 "reported incorrectly due to a known "
1216 "firmware bug, circa July, 2001.)\n");
1217 break;
1218 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1219 dev_info(d, "UNDERRUN\n");
1220 break;
1221 case CMD_DATA_OVERRUN:
1222 dev_warn(d, "cp %p has completed with data overrun\n", cp);
1223 break;
1224 case CMD_INVALID: {
1225 /* controller unfortunately reports SCSI passthru's
1226 * to non-existent targets as invalid commands.
1227 */
1228 dev_warn(d, "cp %p is reported invalid (probably means "
1229 "target device no longer present)\n", cp);
1230 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1231 print_cmd(cp); */
1232 }
1233 break;
1234 case CMD_PROTOCOL_ERR:
1235 dev_warn(d, "cp %p has protocol error \n", cp);
1236 break;
1237 case CMD_HARDWARE_ERR:
1238 /* cmd->result = DID_ERROR << 16; */
1239 dev_warn(d, "cp %p had hardware error\n", cp);
1240 break;
1241 case CMD_CONNECTION_LOST:
1242 dev_warn(d, "cp %p had connection lost\n", cp);
1243 break;
1244 case CMD_ABORTED:
1245 dev_warn(d, "cp %p was aborted\n", cp);
1246 break;
1247 case CMD_ABORT_FAILED:
1248 dev_warn(d, "cp %p reports abort failed\n", cp);
1249 break;
1250 case CMD_UNSOLICITED_ABORT:
1251 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1252 break;
1253 case CMD_TIMEOUT:
1254 dev_warn(d, "cp %p timed out\n", cp);
1255 break;
1256 default:
1257 dev_warn(d, "cp %p returned unknown status %x\n", cp,
1258 ei->CommandStatus);
1259 }
1260}
1261
1262static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1263 unsigned char page, unsigned char *buf,
1264 unsigned char bufsize)
1265{
1266 int rc = IO_OK;
1267 struct CommandList *c;
1268 struct ErrorInfo *ei;
1269
1270 c = cmd_special_alloc(h);
1271
1272 if (c == NULL) { /* trouble... */
1273 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06001274 return -ENOMEM;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001275 }
1276
1277 fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
1278 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1279 ei = c->err_info;
1280 if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1281 hpsa_scsi_interpret_error(c);
1282 rc = -1;
1283 }
1284 cmd_special_free(h, c);
1285 return rc;
1286}
1287
1288static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1289{
1290 int rc = IO_OK;
1291 struct CommandList *c;
1292 struct ErrorInfo *ei;
1293
1294 c = cmd_special_alloc(h);
1295
1296 if (c == NULL) { /* trouble... */
1297 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1298 return -1;
1299 }
1300
1301 fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
1302 hpsa_scsi_do_simple_cmd_core(h, c);
1303 /* no unmap needed here because no data xfer. */
1304
1305 ei = c->err_info;
1306 if (ei->CommandStatus != 0) {
1307 hpsa_scsi_interpret_error(c);
1308 rc = -1;
1309 }
1310 cmd_special_free(h, c);
1311 return rc;
1312}
1313
1314static void hpsa_get_raid_level(struct ctlr_info *h,
1315 unsigned char *scsi3addr, unsigned char *raid_level)
1316{
1317 int rc;
1318 unsigned char *buf;
1319
1320 *raid_level = RAID_UNKNOWN;
1321 buf = kzalloc(64, GFP_KERNEL);
1322 if (!buf)
1323 return;
1324 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1325 if (rc == 0)
1326 *raid_level = buf[8];
1327 if (*raid_level > RAID_UNKNOWN)
1328 *raid_level = RAID_UNKNOWN;
1329 kfree(buf);
1330 return;
1331}
1332
1333/* Get the device id from inquiry page 0x83 */
1334static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1335 unsigned char *device_id, int buflen)
1336{
1337 int rc;
1338 unsigned char *buf;
1339
1340 if (buflen > 16)
1341 buflen = 16;
1342 buf = kzalloc(64, GFP_KERNEL);
1343 if (!buf)
1344 return -1;
1345 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1346 if (rc == 0)
1347 memcpy(device_id, &buf[8], buflen);
1348 kfree(buf);
1349 return rc != 0;
1350}
1351
1352static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1353 struct ReportLUNdata *buf, int bufsize,
1354 int extended_response)
1355{
1356 int rc = IO_OK;
1357 struct CommandList *c;
1358 unsigned char scsi3addr[8];
1359 struct ErrorInfo *ei;
1360
1361 c = cmd_special_alloc(h);
1362 if (c == NULL) { /* trouble... */
1363 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1364 return -1;
1365 }
Stephen M. Camerone89c0ae2010-02-04 08:42:04 -06001366 /* address the controller */
1367 memset(scsi3addr, 0, sizeof(scsi3addr));
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001368 fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1369 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1370 if (extended_response)
1371 c->Request.CDB[1] = extended_response;
1372 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1373 ei = c->err_info;
1374 if (ei->CommandStatus != 0 &&
1375 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1376 hpsa_scsi_interpret_error(c);
1377 rc = -1;
1378 }
1379 cmd_special_free(h, c);
1380 return rc;
1381}
1382
1383static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1384 struct ReportLUNdata *buf,
1385 int bufsize, int extended_response)
1386{
1387 return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1388}
1389
1390static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1391 struct ReportLUNdata *buf, int bufsize)
1392{
1393 return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1394}
1395
1396static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1397 int bus, int target, int lun)
1398{
1399 device->bus = bus;
1400 device->target = target;
1401 device->lun = lun;
1402}
1403
1404static int hpsa_update_device_info(struct ctlr_info *h,
1405 unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device)
1406{
1407#define OBDR_TAPE_INQ_SIZE 49
Stephen M. Cameronea6d3bc2010-02-04 08:42:09 -06001408 unsigned char *inq_buff;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001409
Stephen M. Cameronea6d3bc2010-02-04 08:42:09 -06001410 inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001411 if (!inq_buff)
1412 goto bail_out;
1413
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001414 /* Do an inquiry to the device to see what it is. */
1415 if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1416 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1417 /* Inquiry failed (msg printed already) */
1418 dev_err(&h->pdev->dev,
1419 "hpsa_update_device_info: inquiry failed\n");
1420 goto bail_out;
1421 }
1422
1423 /* As a side effect, record the firmware version number
1424 * if we happen to be talking to the RAID controller.
1425 */
1426 if (is_hba_lunid(scsi3addr))
1427 memcpy(h->firm_ver, &inq_buff[32], 4);
1428
1429 this_device->devtype = (inq_buff[0] & 0x1f);
1430 memcpy(this_device->scsi3addr, scsi3addr, 8);
1431 memcpy(this_device->vendor, &inq_buff[8],
1432 sizeof(this_device->vendor));
1433 memcpy(this_device->model, &inq_buff[16],
1434 sizeof(this_device->model));
1435 memcpy(this_device->revision, &inq_buff[32],
1436 sizeof(this_device->revision));
1437 memset(this_device->device_id, 0,
1438 sizeof(this_device->device_id));
1439 hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1440 sizeof(this_device->device_id));
1441
1442 if (this_device->devtype == TYPE_DISK &&
1443 is_logical_dev_addr_mode(scsi3addr))
1444 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1445 else
1446 this_device->raid_level = RAID_UNKNOWN;
1447
1448 kfree(inq_buff);
1449 return 0;
1450
1451bail_out:
1452 kfree(inq_buff);
1453 return 1;
1454}
1455
1456static unsigned char *msa2xxx_model[] = {
1457 "MSA2012",
1458 "MSA2024",
1459 "MSA2312",
1460 "MSA2324",
1461 NULL,
1462};
1463
1464static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1465{
1466 int i;
1467
1468 for (i = 0; msa2xxx_model[i]; i++)
1469 if (strncmp(device->model, msa2xxx_model[i],
1470 strlen(msa2xxx_model[i])) == 0)
1471 return 1;
1472 return 0;
1473}
1474
1475/* Helper function to assign bus, target, lun mapping of devices.
1476 * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical
1477 * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1478 * Logical drive target and lun are assigned at this time, but
1479 * physical device lun and target assignment are deferred (assigned
1480 * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1481 */
1482static void figure_bus_target_lun(struct ctlr_info *h,
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001483 u8 *lunaddrbytes, int *bus, int *target, int *lun,
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001484 struct hpsa_scsi_dev_t *device)
1485{
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001486 u32 lunid;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001487
1488 if (is_logical_dev_addr_mode(lunaddrbytes)) {
1489 /* logical device */
Stephen M. Cameron6df1e952010-02-04 08:42:19 -06001490 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001491 if (is_msa2xxx(h, device)) {
1492 *bus = 1;
1493 *target = (lunid >> 16) & 0x3fff;
1494 *lun = lunid & 0x00ff;
1495 } else {
1496 *bus = 0;
1497 *lun = 0;
1498 *target = lunid & 0x3fff;
1499 }
1500 } else {
1501 /* physical device */
1502 if (is_hba_lunid(lunaddrbytes))
1503 *bus = 3;
1504 else
1505 *bus = 2;
1506 *target = -1;
1507 *lun = -1; /* we will fill these in later. */
1508 }
1509}
1510
1511/*
1512 * If there is no lun 0 on a target, linux won't find any devices.
1513 * For the MSA2xxx boxes, we have to manually detect the enclosure
1514 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1515 * it for some reason. *tmpdevice is the target we're adding,
1516 * this_device is a pointer into the current element of currentsd[]
1517 * that we're building up in update_scsi_devices(), below.
1518 * lunzerobits is a bitmap that tracks which targets already have a
1519 * lun 0 assigned.
1520 * Returns 1 if an enclosure was added, 0 if not.
1521 */
1522static int add_msa2xxx_enclosure_device(struct ctlr_info *h,
1523 struct hpsa_scsi_dev_t *tmpdevice,
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001524 struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001525 int bus, int target, int lun, unsigned long lunzerobits[],
1526 int *nmsa2xxx_enclosures)
1527{
1528 unsigned char scsi3addr[8];
1529
1530 if (test_bit(target, lunzerobits))
1531 return 0; /* There is already a lun 0 on this target. */
1532
1533 if (!is_logical_dev_addr_mode(lunaddrbytes))
1534 return 0; /* It's the logical targets that may lack lun 0. */
1535
1536 if (!is_msa2xxx(h, tmpdevice))
1537 return 0; /* It's only the MSA2xxx that have this problem. */
1538
1539 if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */
1540 return 0;
1541
1542 if (is_hba_lunid(scsi3addr))
1543 return 0; /* Don't add the RAID controller here. */
1544
1545#define MAX_MSA2XXX_ENCLOSURES 32
1546 if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) {
1547 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX "
1548 "enclosures exceeded. Check your hardware "
1549 "configuration.");
1550 return 0;
1551 }
1552
1553 memset(scsi3addr, 0, 8);
1554 scsi3addr[3] = target;
1555 if (hpsa_update_device_info(h, scsi3addr, this_device))
1556 return 0;
1557 (*nmsa2xxx_enclosures)++;
1558 hpsa_set_bus_target_lun(this_device, bus, target, 0);
1559 set_bit(target, lunzerobits);
1560 return 1;
1561}
1562
1563/*
1564 * Do CISS_REPORT_PHYS and CISS_REPORT_LOG. Data is returned in physdev,
1565 * logdev. The number of luns in physdev and logdev are returned in
1566 * *nphysicals and *nlogicals, respectively.
1567 * Returns 0 on success, -1 otherwise.
1568 */
1569static int hpsa_gather_lun_info(struct ctlr_info *h,
1570 int reportlunsize,
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001571 struct ReportLUNdata *physdev, u32 *nphysicals,
1572 struct ReportLUNdata *logdev, u32 *nlogicals)
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001573{
1574 if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1575 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1576 return -1;
1577 }
Stephen M. Cameron6df1e952010-02-04 08:42:19 -06001578 *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001579 if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1580 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1581 " %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1582 *nphysicals - HPSA_MAX_PHYS_LUN);
1583 *nphysicals = HPSA_MAX_PHYS_LUN;
1584 }
1585 if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1586 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1587 return -1;
1588 }
Stephen M. Cameron6df1e952010-02-04 08:42:19 -06001589 *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001590 /* Reject Logicals in excess of our max capability. */
1591 if (*nlogicals > HPSA_MAX_LUN) {
1592 dev_warn(&h->pdev->dev,
1593 "maximum logical LUNs (%d) exceeded. "
1594 "%d LUNs ignored.\n", HPSA_MAX_LUN,
1595 *nlogicals - HPSA_MAX_LUN);
1596 *nlogicals = HPSA_MAX_LUN;
1597 }
1598 if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1599 dev_warn(&h->pdev->dev,
1600 "maximum logical + physical LUNs (%d) exceeded. "
1601 "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1602 *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1603 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1604 }
1605 return 0;
1606}
1607
1608static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1609{
1610 /* the idea here is we could get notified
1611 * that some devices have changed, so we do a report
1612 * physical luns and report logical luns cmd, and adjust
1613 * our list of devices accordingly.
1614 *
1615 * The scsi3addr's of devices won't change so long as the
1616 * adapter is not reset. That means we can rescan and
1617 * tell which devices we already know about, vs. new
1618 * devices, vs. disappearing devices.
1619 */
1620 struct ReportLUNdata *physdev_list = NULL;
1621 struct ReportLUNdata *logdev_list = NULL;
1622 unsigned char *inq_buff = NULL;
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001623 u32 nphysicals = 0;
1624 u32 nlogicals = 0;
1625 u32 ndev_allocated = 0;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001626 struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1627 int ncurrent = 0;
1628 int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1629 int i, nmsa2xxx_enclosures, ndevs_to_allocate;
1630 int bus, target, lun;
1631 DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR);
1632
1633 currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA,
1634 GFP_KERNEL);
1635 physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1636 logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1637 inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1638 tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1639
1640 if (!currentsd || !physdev_list || !logdev_list ||
1641 !inq_buff || !tmpdevice) {
1642 dev_err(&h->pdev->dev, "out of memory\n");
1643 goto out;
1644 }
1645 memset(lunzerobits, 0, sizeof(lunzerobits));
1646
1647 if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1648 logdev_list, &nlogicals))
1649 goto out;
1650
1651 /* We might see up to 32 MSA2xxx enclosures, actually 8 of them
1652 * but each of them 4 times through different paths. The plus 1
1653 * is for the RAID controller.
1654 */
1655 ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1;
1656
1657 /* Allocate the per device structures */
1658 for (i = 0; i < ndevs_to_allocate; i++) {
1659 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1660 if (!currentsd[i]) {
1661 dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1662 __FILE__, __LINE__);
1663 goto out;
1664 }
1665 ndev_allocated++;
1666 }
1667
1668 /* adjust our table of devices */
1669 nmsa2xxx_enclosures = 0;
1670 for (i = 0; i < nphysicals + nlogicals + 1; i++) {
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001671 u8 *lunaddrbytes;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001672
1673 /* Figure out where the LUN ID info is coming from */
1674 if (i < nphysicals)
1675 lunaddrbytes = &physdev_list->LUN[i][0];
1676 else
1677 if (i < nphysicals + nlogicals)
1678 lunaddrbytes =
1679 &logdev_list->LUN[i-nphysicals][0];
1680 else /* jam in the RAID controller at the end */
1681 lunaddrbytes = RAID_CTLR_LUNID;
1682
1683 /* skip masked physical devices. */
1684 if (lunaddrbytes[3] & 0xC0 && i < nphysicals)
1685 continue;
1686
1687 /* Get device type, vendor, model, device id */
1688 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice))
1689 continue; /* skip it if we can't talk to it. */
1690 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun,
1691 tmpdevice);
1692 this_device = currentsd[ncurrent];
1693
1694 /*
1695 * For the msa2xxx boxes, we have to insert a LUN 0 which
1696 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
1697 * is nonetheless an enclosure device there. We have to
1698 * present that otherwise linux won't find anything if
1699 * there is no lun 0.
1700 */
1701 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device,
1702 lunaddrbytes, bus, target, lun, lunzerobits,
1703 &nmsa2xxx_enclosures)) {
1704 ncurrent++;
1705 this_device = currentsd[ncurrent];
1706 }
1707
1708 *this_device = *tmpdevice;
1709 hpsa_set_bus_target_lun(this_device, bus, target, lun);
1710
1711 switch (this_device->devtype) {
1712 case TYPE_ROM: {
1713 /* We don't *really* support actual CD-ROM devices,
1714 * just "One Button Disaster Recovery" tape drive
1715 * which temporarily pretends to be a CD-ROM drive.
1716 * So we check that the device is really an OBDR tape
1717 * device by checking for "$DR-10" in bytes 43-48 of
1718 * the inquiry data.
1719 */
1720 char obdr_sig[7];
1721#define OBDR_TAPE_SIG "$DR-10"
1722 strncpy(obdr_sig, &inq_buff[43], 6);
1723 obdr_sig[6] = '\0';
1724 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1725 /* Not OBDR device, ignore it. */
1726 break;
1727 }
1728 ncurrent++;
1729 break;
1730 case TYPE_DISK:
1731 if (i < nphysicals)
1732 break;
1733 ncurrent++;
1734 break;
1735 case TYPE_TAPE:
1736 case TYPE_MEDIUM_CHANGER:
1737 ncurrent++;
1738 break;
1739 case TYPE_RAID:
1740 /* Only present the Smartarray HBA as a RAID controller.
1741 * If it's a RAID controller other than the HBA itself
1742 * (an external RAID controller, MSA500 or similar)
1743 * don't present it.
1744 */
1745 if (!is_hba_lunid(lunaddrbytes))
1746 break;
1747 ncurrent++;
1748 break;
1749 default:
1750 break;
1751 }
1752 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA)
1753 break;
1754 }
1755 adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
1756out:
1757 kfree(tmpdevice);
1758 for (i = 0; i < ndev_allocated; i++)
1759 kfree(currentsd[i]);
1760 kfree(currentsd);
1761 kfree(inq_buff);
1762 kfree(physdev_list);
1763 kfree(logdev_list);
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001764}
1765
1766/* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1767 * dma mapping and fills in the scatter gather entries of the
1768 * hpsa command, cp.
1769 */
1770static int hpsa_scatter_gather(struct pci_dev *pdev,
1771 struct CommandList *cp,
1772 struct scsi_cmnd *cmd)
1773{
1774 unsigned int len;
1775 struct scatterlist *sg;
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001776 u64 addr64;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001777 int use_sg, i;
1778
1779 BUG_ON(scsi_sg_count(cmd) > MAXSGENTRIES);
1780
1781 use_sg = scsi_dma_map(cmd);
1782 if (use_sg < 0)
1783 return use_sg;
1784
1785 if (!use_sg)
1786 goto sglist_finished;
1787
1788 scsi_for_each_sg(cmd, sg, use_sg, i) {
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001789 addr64 = (u64) sg_dma_address(sg);
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001790 len = sg_dma_len(sg);
1791 cp->SG[i].Addr.lower =
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001792 (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001793 cp->SG[i].Addr.upper =
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001794 (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001795 cp->SG[i].Len = len;
1796 cp->SG[i].Ext = 0; /* we are not chaining */
1797 }
1798
1799sglist_finished:
1800
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06001801 cp->Header.SGList = (u8) use_sg; /* no. SGs contig in this cmd */
1802 cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
Stephen M. Cameronedd16362009-12-08 14:09:11 -08001803 return 0;
1804}
1805
1806
1807static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
1808 void (*done)(struct scsi_cmnd *))
1809{
1810 struct ctlr_info *h;
1811 struct hpsa_scsi_dev_t *dev;
1812 unsigned char scsi3addr[8];
1813 struct CommandList *c;
1814 unsigned long flags;
1815
1816 /* Get the ptr to our adapter structure out of cmd->host. */
1817 h = sdev_to_hba(cmd->device);
1818 dev = cmd->device->hostdata;
1819 if (!dev) {
1820 cmd->result = DID_NO_CONNECT << 16;
1821 done(cmd);
1822 return 0;
1823 }
1824 memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
1825
1826 /* Need a lock as this is being allocated from the pool */
1827 spin_lock_irqsave(&h->lock, flags);
1828 c = cmd_alloc(h);
1829 spin_unlock_irqrestore(&h->lock, flags);
1830 if (c == NULL) { /* trouble... */
1831 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
1832 return SCSI_MLQUEUE_HOST_BUSY;
1833 }
1834
1835 /* Fill in the command list header */
1836
1837 cmd->scsi_done = done; /* save this for use by completion code */
1838
1839 /* save c in case we have to abort it */
1840 cmd->host_scribble = (unsigned char *) c;
1841
1842 c->cmd_type = CMD_SCSI;
1843 c->scsi_cmd = cmd;
1844 c->Header.ReplyQueue = 0; /* unused in simple mode */
1845 memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1846 c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */
1847
1848 /* Fill in the request block... */
1849
1850 c->Request.Timeout = 0;
1851 memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1852 BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1853 c->Request.CDBLen = cmd->cmd_len;
1854 memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1855 c->Request.Type.Type = TYPE_CMD;
1856 c->Request.Type.Attribute = ATTR_SIMPLE;
1857 switch (cmd->sc_data_direction) {
1858 case DMA_TO_DEVICE:
1859 c->Request.Type.Direction = XFER_WRITE;
1860 break;
1861 case DMA_FROM_DEVICE:
1862 c->Request.Type.Direction = XFER_READ;
1863 break;
1864 case DMA_NONE:
1865 c->Request.Type.Direction = XFER_NONE;
1866 break;
1867 case DMA_BIDIRECTIONAL:
1868 /* This can happen if a buggy application does a scsi passthru
1869 * and sets both inlen and outlen to non-zero. ( see
1870 * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1871 */
1872
1873 c->Request.Type.Direction = XFER_RSVD;
1874 /* This is technically wrong, and hpsa controllers should
1875 * reject it with CMD_INVALID, which is the most correct
1876 * response, but non-fibre backends appear to let it
1877 * slide by, and give the same results as if this field
1878 * were set correctly. Either way is acceptable for
1879 * our purposes here.
1880 */
1881
1882 break;
1883
1884 default:
1885 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
1886 cmd->sc_data_direction);
1887 BUG();
1888 break;
1889 }
1890
1891 if (hpsa_scatter_gather(h->pdev, c, cmd) < 0) { /* Fill SG list */
1892 cmd_free(h, c);
1893 return SCSI_MLQUEUE_HOST_BUSY;
1894 }
1895 enqueue_cmd_and_start_io(h, c);
1896 /* the cmd'll come back via intr handler in complete_scsi_command() */
1897 return 0;
1898}
1899
1900static void hpsa_unregister_scsi(struct ctlr_info *h)
1901{
1902 /* we are being forcibly unloaded, and may not refuse. */
1903 scsi_remove_host(h->scsi_host);
1904 scsi_host_put(h->scsi_host);
1905 h->scsi_host = NULL;
1906}
1907
1908static int hpsa_register_scsi(struct ctlr_info *h)
1909{
1910 int rc;
1911
1912 hpsa_update_scsi_devices(h, -1);
1913 rc = hpsa_scsi_detect(h);
1914 if (rc != 0)
1915 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed"
1916 " hpsa_scsi_detect(), rc is %d\n", rc);
1917 return rc;
1918}
1919
1920static int wait_for_device_to_become_ready(struct ctlr_info *h,
1921 unsigned char lunaddr[])
1922{
1923 int rc = 0;
1924 int count = 0;
1925 int waittime = 1; /* seconds */
1926 struct CommandList *c;
1927
1928 c = cmd_special_alloc(h);
1929 if (!c) {
1930 dev_warn(&h->pdev->dev, "out of memory in "
1931 "wait_for_device_to_become_ready.\n");
1932 return IO_ERROR;
1933 }
1934
1935 /* Send test unit ready until device ready, or give up. */
1936 while (count < HPSA_TUR_RETRY_LIMIT) {
1937
1938 /* Wait for a bit. do this first, because if we send
1939 * the TUR right away, the reset will just abort it.
1940 */
1941 msleep(1000 * waittime);
1942 count++;
1943
1944 /* Increase wait time with each try, up to a point. */
1945 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
1946 waittime = waittime * 2;
1947
1948 /* Send the Test Unit Ready */
1949 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
1950 hpsa_scsi_do_simple_cmd_core(h, c);
1951 /* no unmap needed here because no data xfer. */
1952
1953 if (c->err_info->CommandStatus == CMD_SUCCESS)
1954 break;
1955
1956 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1957 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
1958 (c->err_info->SenseInfo[2] == NO_SENSE ||
1959 c->err_info->SenseInfo[2] == UNIT_ATTENTION))
1960 break;
1961
1962 dev_warn(&h->pdev->dev, "waiting %d secs "
1963 "for device to become ready.\n", waittime);
1964 rc = 1; /* device not ready. */
1965 }
1966
1967 if (rc)
1968 dev_warn(&h->pdev->dev, "giving up on device.\n");
1969 else
1970 dev_warn(&h->pdev->dev, "device is ready.\n");
1971
1972 cmd_special_free(h, c);
1973 return rc;
1974}
1975
1976/* Need at least one of these error handlers to keep ../scsi/hosts.c from
1977 * complaining. Doing a host- or bus-reset can't do anything good here.
1978 */
1979static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
1980{
1981 int rc;
1982 struct ctlr_info *h;
1983 struct hpsa_scsi_dev_t *dev;
1984
1985 /* find the controller to which the command to be aborted was sent */
1986 h = sdev_to_hba(scsicmd->device);
1987 if (h == NULL) /* paranoia */
1988 return FAILED;
1989 dev_warn(&h->pdev->dev, "resetting drive\n");
1990
1991 dev = scsicmd->device->hostdata;
1992 if (!dev) {
1993 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
1994 "device lookup failed.\n");
1995 return FAILED;
1996 }
1997 /* send a reset to the SCSI LUN which the command was sent to */
1998 rc = hpsa_send_reset(h, dev->scsi3addr);
1999 if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2000 return SUCCESS;
2001
2002 dev_warn(&h->pdev->dev, "resetting device failed.\n");
2003 return FAILED;
2004}
2005
2006/*
2007 * For operations that cannot sleep, a command block is allocated at init,
2008 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2009 * which ones are free or in use. Lock must be held when calling this.
2010 * cmd_free() is the complement.
2011 */
2012static struct CommandList *cmd_alloc(struct ctlr_info *h)
2013{
2014 struct CommandList *c;
2015 int i;
2016 union u64bit temp64;
2017 dma_addr_t cmd_dma_handle, err_dma_handle;
2018
2019 do {
2020 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2021 if (i == h->nr_cmds)
2022 return NULL;
2023 } while (test_and_set_bit
2024 (i & (BITS_PER_LONG - 1),
2025 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2026 c = h->cmd_pool + i;
2027 memset(c, 0, sizeof(*c));
2028 cmd_dma_handle = h->cmd_pool_dhandle
2029 + i * sizeof(*c);
2030 c->err_info = h->errinfo_pool + i;
2031 memset(c->err_info, 0, sizeof(*c->err_info));
2032 err_dma_handle = h->errinfo_pool_dhandle
2033 + i * sizeof(*c->err_info);
2034 h->nr_allocs++;
2035
2036 c->cmdindex = i;
2037
2038 INIT_HLIST_NODE(&c->list);
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06002039 c->busaddr = (u32) cmd_dma_handle;
2040 temp64.val = (u64) err_dma_handle;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08002041 c->ErrDesc.Addr.lower = temp64.val32.lower;
2042 c->ErrDesc.Addr.upper = temp64.val32.upper;
2043 c->ErrDesc.Len = sizeof(*c->err_info);
2044
2045 c->h = h;
2046 return c;
2047}
2048
2049/* For operations that can wait for kmalloc to possibly sleep,
2050 * this routine can be called. Lock need not be held to call
2051 * cmd_special_alloc. cmd_special_free() is the complement.
2052 */
2053static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2054{
2055 struct CommandList *c;
2056 union u64bit temp64;
2057 dma_addr_t cmd_dma_handle, err_dma_handle;
2058
2059 c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2060 if (c == NULL)
2061 return NULL;
2062 memset(c, 0, sizeof(*c));
2063
2064 c->cmdindex = -1;
2065
2066 c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2067 &err_dma_handle);
2068
2069 if (c->err_info == NULL) {
2070 pci_free_consistent(h->pdev,
2071 sizeof(*c), c, cmd_dma_handle);
2072 return NULL;
2073 }
2074 memset(c->err_info, 0, sizeof(*c->err_info));
2075
2076 INIT_HLIST_NODE(&c->list);
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06002077 c->busaddr = (u32) cmd_dma_handle;
2078 temp64.val = (u64) err_dma_handle;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08002079 c->ErrDesc.Addr.lower = temp64.val32.lower;
2080 c->ErrDesc.Addr.upper = temp64.val32.upper;
2081 c->ErrDesc.Len = sizeof(*c->err_info);
2082
2083 c->h = h;
2084 return c;
2085}
2086
2087static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2088{
2089 int i;
2090
2091 i = c - h->cmd_pool;
2092 clear_bit(i & (BITS_PER_LONG - 1),
2093 h->cmd_pool_bits + (i / BITS_PER_LONG));
2094 h->nr_frees++;
2095}
2096
2097static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2098{
2099 union u64bit temp64;
2100
2101 temp64.val32.lower = c->ErrDesc.Addr.lower;
2102 temp64.val32.upper = c->ErrDesc.Addr.upper;
2103 pci_free_consistent(h->pdev, sizeof(*c->err_info),
2104 c->err_info, (dma_addr_t) temp64.val);
2105 pci_free_consistent(h->pdev, sizeof(*c),
2106 c, (dma_addr_t) c->busaddr);
2107}
2108
2109#ifdef CONFIG_COMPAT
2110
2111static int do_ioctl(struct scsi_device *dev, int cmd, void *arg)
2112{
2113 int ret;
2114
2115 lock_kernel();
2116 ret = hpsa_ioctl(dev, cmd, arg);
2117 unlock_kernel();
2118 return ret;
2119}
2120
2121static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg);
2122static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2123 int cmd, void *arg);
2124
2125static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2126{
2127 switch (cmd) {
2128 case CCISS_GETPCIINFO:
2129 case CCISS_GETINTINFO:
2130 case CCISS_SETINTINFO:
2131 case CCISS_GETNODENAME:
2132 case CCISS_SETNODENAME:
2133 case CCISS_GETHEARTBEAT:
2134 case CCISS_GETBUSTYPES:
2135 case CCISS_GETFIRMVER:
2136 case CCISS_GETDRIVVER:
2137 case CCISS_REVALIDVOLS:
2138 case CCISS_DEREGDISK:
2139 case CCISS_REGNEWDISK:
2140 case CCISS_REGNEWD:
2141 case CCISS_RESCANDISK:
2142 case CCISS_GETLUNINFO:
2143 return do_ioctl(dev, cmd, arg);
2144
2145 case CCISS_PASSTHRU32:
2146 return hpsa_ioctl32_passthru(dev, cmd, arg);
2147 case CCISS_BIG_PASSTHRU32:
2148 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2149
2150 default:
2151 return -ENOIOCTLCMD;
2152 }
2153}
2154
2155static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2156{
2157 IOCTL32_Command_struct __user *arg32 =
2158 (IOCTL32_Command_struct __user *) arg;
2159 IOCTL_Command_struct arg64;
2160 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2161 int err;
2162 u32 cp;
2163
2164 err = 0;
2165 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2166 sizeof(arg64.LUN_info));
2167 err |= copy_from_user(&arg64.Request, &arg32->Request,
2168 sizeof(arg64.Request));
2169 err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2170 sizeof(arg64.error_info));
2171 err |= get_user(arg64.buf_size, &arg32->buf_size);
2172 err |= get_user(cp, &arg32->buf);
2173 arg64.buf = compat_ptr(cp);
2174 err |= copy_to_user(p, &arg64, sizeof(arg64));
2175
2176 if (err)
2177 return -EFAULT;
2178
2179 err = do_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2180 if (err)
2181 return err;
2182 err |= copy_in_user(&arg32->error_info, &p->error_info,
2183 sizeof(arg32->error_info));
2184 if (err)
2185 return -EFAULT;
2186 return err;
2187}
2188
2189static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2190 int cmd, void *arg)
2191{
2192 BIG_IOCTL32_Command_struct __user *arg32 =
2193 (BIG_IOCTL32_Command_struct __user *) arg;
2194 BIG_IOCTL_Command_struct arg64;
2195 BIG_IOCTL_Command_struct __user *p =
2196 compat_alloc_user_space(sizeof(arg64));
2197 int err;
2198 u32 cp;
2199
2200 err = 0;
2201 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2202 sizeof(arg64.LUN_info));
2203 err |= copy_from_user(&arg64.Request, &arg32->Request,
2204 sizeof(arg64.Request));
2205 err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2206 sizeof(arg64.error_info));
2207 err |= get_user(arg64.buf_size, &arg32->buf_size);
2208 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2209 err |= get_user(cp, &arg32->buf);
2210 arg64.buf = compat_ptr(cp);
2211 err |= copy_to_user(p, &arg64, sizeof(arg64));
2212
2213 if (err)
2214 return -EFAULT;
2215
2216 err = do_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2217 if (err)
2218 return err;
2219 err |= copy_in_user(&arg32->error_info, &p->error_info,
2220 sizeof(arg32->error_info));
2221 if (err)
2222 return -EFAULT;
2223 return err;
2224}
2225#endif
2226
2227static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2228{
2229 struct hpsa_pci_info pciinfo;
2230
2231 if (!argp)
2232 return -EINVAL;
2233 pciinfo.domain = pci_domain_nr(h->pdev->bus);
2234 pciinfo.bus = h->pdev->bus->number;
2235 pciinfo.dev_fn = h->pdev->devfn;
2236 pciinfo.board_id = h->board_id;
2237 if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2238 return -EFAULT;
2239 return 0;
2240}
2241
2242static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2243{
2244 DriverVer_type DriverVer;
2245 unsigned char vmaj, vmin, vsubmin;
2246 int rc;
2247
2248 rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2249 &vmaj, &vmin, &vsubmin);
2250 if (rc != 3) {
2251 dev_info(&h->pdev->dev, "driver version string '%s' "
2252 "unrecognized.", HPSA_DRIVER_VERSION);
2253 vmaj = 0;
2254 vmin = 0;
2255 vsubmin = 0;
2256 }
2257 DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2258 if (!argp)
2259 return -EINVAL;
2260 if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2261 return -EFAULT;
2262 return 0;
2263}
2264
2265static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2266{
2267 IOCTL_Command_struct iocommand;
2268 struct CommandList *c;
2269 char *buff = NULL;
2270 union u64bit temp64;
2271
2272 if (!argp)
2273 return -EINVAL;
2274 if (!capable(CAP_SYS_RAWIO))
2275 return -EPERM;
2276 if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2277 return -EFAULT;
2278 if ((iocommand.buf_size < 1) &&
2279 (iocommand.Request.Type.Direction != XFER_NONE)) {
2280 return -EINVAL;
2281 }
2282 if (iocommand.buf_size > 0) {
2283 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2284 if (buff == NULL)
2285 return -EFAULT;
2286 }
2287 if (iocommand.Request.Type.Direction == XFER_WRITE) {
2288 /* Copy the data into the buffer we created */
2289 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) {
2290 kfree(buff);
2291 return -EFAULT;
2292 }
2293 } else
2294 memset(buff, 0, iocommand.buf_size);
2295 c = cmd_special_alloc(h);
2296 if (c == NULL) {
2297 kfree(buff);
2298 return -ENOMEM;
2299 }
2300 /* Fill in the command type */
2301 c->cmd_type = CMD_IOCTL_PEND;
2302 /* Fill in Command Header */
2303 c->Header.ReplyQueue = 0; /* unused in simple mode */
2304 if (iocommand.buf_size > 0) { /* buffer to fill */
2305 c->Header.SGList = 1;
2306 c->Header.SGTotal = 1;
2307 } else { /* no buffers to fill */
2308 c->Header.SGList = 0;
2309 c->Header.SGTotal = 0;
2310 }
2311 memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2312 /* use the kernel address the cmd block for tag */
2313 c->Header.Tag.lower = c->busaddr;
2314
2315 /* Fill in Request block */
2316 memcpy(&c->Request, &iocommand.Request,
2317 sizeof(c->Request));
2318
2319 /* Fill in the scatter gather information */
2320 if (iocommand.buf_size > 0) {
2321 temp64.val = pci_map_single(h->pdev, buff,
2322 iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2323 c->SG[0].Addr.lower = temp64.val32.lower;
2324 c->SG[0].Addr.upper = temp64.val32.upper;
2325 c->SG[0].Len = iocommand.buf_size;
2326 c->SG[0].Ext = 0; /* we are not chaining*/
2327 }
2328 hpsa_scsi_do_simple_cmd_core(h, c);
2329 hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2330 check_ioctl_unit_attention(h, c);
2331
2332 /* Copy the error information out */
2333 memcpy(&iocommand.error_info, c->err_info,
2334 sizeof(iocommand.error_info));
2335 if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
2336 kfree(buff);
2337 cmd_special_free(h, c);
2338 return -EFAULT;
2339 }
2340
2341 if (iocommand.Request.Type.Direction == XFER_READ) {
2342 /* Copy the data out of the buffer we created */
2343 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
2344 kfree(buff);
2345 cmd_special_free(h, c);
2346 return -EFAULT;
2347 }
2348 }
2349 kfree(buff);
2350 cmd_special_free(h, c);
2351 return 0;
2352}
2353
2354static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2355{
2356 BIG_IOCTL_Command_struct *ioc;
2357 struct CommandList *c;
2358 unsigned char **buff = NULL;
2359 int *buff_size = NULL;
2360 union u64bit temp64;
2361 BYTE sg_used = 0;
2362 int status = 0;
2363 int i;
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06002364 u32 left;
2365 u32 sz;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08002366 BYTE __user *data_ptr;
2367
2368 if (!argp)
2369 return -EINVAL;
2370 if (!capable(CAP_SYS_RAWIO))
2371 return -EPERM;
2372 ioc = (BIG_IOCTL_Command_struct *)
2373 kmalloc(sizeof(*ioc), GFP_KERNEL);
2374 if (!ioc) {
2375 status = -ENOMEM;
2376 goto cleanup1;
2377 }
2378 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
2379 status = -EFAULT;
2380 goto cleanup1;
2381 }
2382 if ((ioc->buf_size < 1) &&
2383 (ioc->Request.Type.Direction != XFER_NONE)) {
2384 status = -EINVAL;
2385 goto cleanup1;
2386 }
2387 /* Check kmalloc limits using all SGs */
2388 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
2389 status = -EINVAL;
2390 goto cleanup1;
2391 }
2392 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
2393 status = -EINVAL;
2394 goto cleanup1;
2395 }
2396 buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
2397 if (!buff) {
2398 status = -ENOMEM;
2399 goto cleanup1;
2400 }
2401 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
2402 if (!buff_size) {
2403 status = -ENOMEM;
2404 goto cleanup1;
2405 }
2406 left = ioc->buf_size;
2407 data_ptr = ioc->buf;
2408 while (left) {
2409 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
2410 buff_size[sg_used] = sz;
2411 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
2412 if (buff[sg_used] == NULL) {
2413 status = -ENOMEM;
2414 goto cleanup1;
2415 }
2416 if (ioc->Request.Type.Direction == XFER_WRITE) {
2417 if (copy_from_user(buff[sg_used], data_ptr, sz)) {
2418 status = -ENOMEM;
2419 goto cleanup1;
2420 }
2421 } else
2422 memset(buff[sg_used], 0, sz);
2423 left -= sz;
2424 data_ptr += sz;
2425 sg_used++;
2426 }
2427 c = cmd_special_alloc(h);
2428 if (c == NULL) {
2429 status = -ENOMEM;
2430 goto cleanup1;
2431 }
2432 c->cmd_type = CMD_IOCTL_PEND;
2433 c->Header.ReplyQueue = 0;
2434
2435 if (ioc->buf_size > 0) {
2436 c->Header.SGList = sg_used;
2437 c->Header.SGTotal = sg_used;
2438 } else {
2439 c->Header.SGList = 0;
2440 c->Header.SGTotal = 0;
2441 }
2442 memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
2443 c->Header.Tag.lower = c->busaddr;
2444 memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
2445 if (ioc->buf_size > 0) {
2446 int i;
2447 for (i = 0; i < sg_used; i++) {
2448 temp64.val = pci_map_single(h->pdev, buff[i],
2449 buff_size[i], PCI_DMA_BIDIRECTIONAL);
2450 c->SG[i].Addr.lower = temp64.val32.lower;
2451 c->SG[i].Addr.upper = temp64.val32.upper;
2452 c->SG[i].Len = buff_size[i];
2453 /* we are not chaining */
2454 c->SG[i].Ext = 0;
2455 }
2456 }
2457 hpsa_scsi_do_simple_cmd_core(h, c);
2458 hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
2459 check_ioctl_unit_attention(h, c);
2460 /* Copy the error information out */
2461 memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
2462 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
2463 cmd_special_free(h, c);
2464 status = -EFAULT;
2465 goto cleanup1;
2466 }
2467 if (ioc->Request.Type.Direction == XFER_READ) {
2468 /* Copy the data out of the buffer we created */
2469 BYTE __user *ptr = ioc->buf;
2470 for (i = 0; i < sg_used; i++) {
2471 if (copy_to_user(ptr, buff[i], buff_size[i])) {
2472 cmd_special_free(h, c);
2473 status = -EFAULT;
2474 goto cleanup1;
2475 }
2476 ptr += buff_size[i];
2477 }
2478 }
2479 cmd_special_free(h, c);
2480 status = 0;
2481cleanup1:
2482 if (buff) {
2483 for (i = 0; i < sg_used; i++)
2484 kfree(buff[i]);
2485 kfree(buff);
2486 }
2487 kfree(buff_size);
2488 kfree(ioc);
2489 return status;
2490}
2491
2492static void check_ioctl_unit_attention(struct ctlr_info *h,
2493 struct CommandList *c)
2494{
2495 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2496 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
2497 (void) check_for_unit_attention(h, c);
2498}
2499/*
2500 * ioctl
2501 */
2502static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
2503{
2504 struct ctlr_info *h;
2505 void __user *argp = (void __user *)arg;
2506
2507 h = sdev_to_hba(dev);
2508
2509 switch (cmd) {
2510 case CCISS_DEREGDISK:
2511 case CCISS_REGNEWDISK:
2512 case CCISS_REGNEWD:
2513 hpsa_update_scsi_devices(h, dev->host->host_no);
2514 return 0;
2515 case CCISS_GETPCIINFO:
2516 return hpsa_getpciinfo_ioctl(h, argp);
2517 case CCISS_GETDRIVVER:
2518 return hpsa_getdrivver_ioctl(h, argp);
2519 case CCISS_PASSTHRU:
2520 return hpsa_passthru_ioctl(h, argp);
2521 case CCISS_BIG_PASSTHRU:
2522 return hpsa_big_passthru_ioctl(h, argp);
2523 default:
2524 return -ENOTTY;
2525 }
2526}
2527
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06002528static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
2529 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
Stephen M. Cameronedd16362009-12-08 14:09:11 -08002530 int cmd_type)
2531{
2532 int pci_dir = XFER_NONE;
2533
2534 c->cmd_type = CMD_IOCTL_PEND;
2535 c->Header.ReplyQueue = 0;
2536 if (buff != NULL && size > 0) {
2537 c->Header.SGList = 1;
2538 c->Header.SGTotal = 1;
2539 } else {
2540 c->Header.SGList = 0;
2541 c->Header.SGTotal = 0;
2542 }
2543 c->Header.Tag.lower = c->busaddr;
2544 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2545
2546 c->Request.Type.Type = cmd_type;
2547 if (cmd_type == TYPE_CMD) {
2548 switch (cmd) {
2549 case HPSA_INQUIRY:
2550 /* are we trying to read a vital product page */
2551 if (page_code != 0) {
2552 c->Request.CDB[1] = 0x01;
2553 c->Request.CDB[2] = page_code;
2554 }
2555 c->Request.CDBLen = 6;
2556 c->Request.Type.Attribute = ATTR_SIMPLE;
2557 c->Request.Type.Direction = XFER_READ;
2558 c->Request.Timeout = 0;
2559 c->Request.CDB[0] = HPSA_INQUIRY;
2560 c->Request.CDB[4] = size & 0xFF;
2561 break;
2562 case HPSA_REPORT_LOG:
2563 case HPSA_REPORT_PHYS:
2564 /* Talking to controller so It's a physical command
2565 mode = 00 target = 0. Nothing to write.
2566 */
2567 c->Request.CDBLen = 12;
2568 c->Request.Type.Attribute = ATTR_SIMPLE;
2569 c->Request.Type.Direction = XFER_READ;
2570 c->Request.Timeout = 0;
2571 c->Request.CDB[0] = cmd;
2572 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2573 c->Request.CDB[7] = (size >> 16) & 0xFF;
2574 c->Request.CDB[8] = (size >> 8) & 0xFF;
2575 c->Request.CDB[9] = size & 0xFF;
2576 break;
2577
2578 case HPSA_READ_CAPACITY:
2579 c->Request.CDBLen = 10;
2580 c->Request.Type.Attribute = ATTR_SIMPLE;
2581 c->Request.Type.Direction = XFER_READ;
2582 c->Request.Timeout = 0;
2583 c->Request.CDB[0] = cmd;
2584 break;
2585 case HPSA_CACHE_FLUSH:
2586 c->Request.CDBLen = 12;
2587 c->Request.Type.Attribute = ATTR_SIMPLE;
2588 c->Request.Type.Direction = XFER_WRITE;
2589 c->Request.Timeout = 0;
2590 c->Request.CDB[0] = BMIC_WRITE;
2591 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2592 break;
2593 case TEST_UNIT_READY:
2594 c->Request.CDBLen = 6;
2595 c->Request.Type.Attribute = ATTR_SIMPLE;
2596 c->Request.Type.Direction = XFER_NONE;
2597 c->Request.Timeout = 0;
2598 break;
2599 default:
2600 dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
2601 BUG();
2602 return;
2603 }
2604 } else if (cmd_type == TYPE_MSG) {
2605 switch (cmd) {
2606
2607 case HPSA_DEVICE_RESET_MSG:
2608 c->Request.CDBLen = 16;
2609 c->Request.Type.Type = 1; /* It is a MSG not a CMD */
2610 c->Request.Type.Attribute = ATTR_SIMPLE;
2611 c->Request.Type.Direction = XFER_NONE;
2612 c->Request.Timeout = 0; /* Don't time out */
2613 c->Request.CDB[0] = 0x01; /* RESET_MSG is 0x01 */
2614 c->Request.CDB[1] = 0x03; /* Reset target above */
2615 /* If bytes 4-7 are zero, it means reset the */
2616 /* LunID device */
2617 c->Request.CDB[4] = 0x00;
2618 c->Request.CDB[5] = 0x00;
2619 c->Request.CDB[6] = 0x00;
2620 c->Request.CDB[7] = 0x00;
2621 break;
2622
2623 default:
2624 dev_warn(&h->pdev->dev, "unknown message type %d\n",
2625 cmd);
2626 BUG();
2627 }
2628 } else {
2629 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
2630 BUG();
2631 }
2632
2633 switch (c->Request.Type.Direction) {
2634 case XFER_READ:
2635 pci_dir = PCI_DMA_FROMDEVICE;
2636 break;
2637 case XFER_WRITE:
2638 pci_dir = PCI_DMA_TODEVICE;
2639 break;
2640 case XFER_NONE:
2641 pci_dir = PCI_DMA_NONE;
2642 break;
2643 default:
2644 pci_dir = PCI_DMA_BIDIRECTIONAL;
2645 }
2646
2647 hpsa_map_one(h->pdev, c, buff, size, pci_dir);
2648
2649 return;
2650}
2651
2652/*
2653 * Map (physical) PCI mem into (virtual) kernel space
2654 */
2655static void __iomem *remap_pci_mem(ulong base, ulong size)
2656{
2657 ulong page_base = ((ulong) base) & PAGE_MASK;
2658 ulong page_offs = ((ulong) base) - page_base;
2659 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2660
2661 return page_remapped ? (page_remapped + page_offs) : NULL;
2662}
2663
2664/* Takes cmds off the submission queue and sends them to the hardware,
2665 * then puts them on the queue of cmds waiting for completion.
2666 */
2667static void start_io(struct ctlr_info *h)
2668{
2669 struct CommandList *c;
2670
2671 while (!hlist_empty(&h->reqQ)) {
2672 c = hlist_entry(h->reqQ.first, struct CommandList, list);
2673 /* can't do anything if fifo is full */
2674 if ((h->access.fifo_full(h))) {
2675 dev_warn(&h->pdev->dev, "fifo full\n");
2676 break;
2677 }
2678
2679 /* Get the first entry from the Request Q */
2680 removeQ(c);
2681 h->Qdepth--;
2682
2683 /* Tell the controller execute command */
2684 h->access.submit_command(h, c);
2685
2686 /* Put job onto the completed Q */
2687 addQ(&h->cmpQ, c);
2688 }
2689}
2690
2691static inline unsigned long get_next_completion(struct ctlr_info *h)
2692{
2693 return h->access.command_completed(h);
2694}
2695
2696static inline int interrupt_pending(struct ctlr_info *h)
2697{
2698 return h->access.intr_pending(h);
2699}
2700
2701static inline long interrupt_not_for_us(struct ctlr_info *h)
2702{
2703 return ((h->access.intr_pending(h) == 0) ||
2704 (h->interrupts_enabled == 0));
2705}
2706
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06002707static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
2708 u32 raw_tag)
Stephen M. Cameronedd16362009-12-08 14:09:11 -08002709{
2710 if (unlikely(tag_index >= h->nr_cmds)) {
2711 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
2712 return 1;
2713 }
2714 return 0;
2715}
2716
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06002717static inline void finish_cmd(struct CommandList *c, u32 raw_tag)
Stephen M. Cameronedd16362009-12-08 14:09:11 -08002718{
2719 removeQ(c);
2720 if (likely(c->cmd_type == CMD_SCSI))
2721 complete_scsi_command(c, 0, raw_tag);
2722 else if (c->cmd_type == CMD_IOCTL_PEND)
2723 complete(c->waiting);
2724}
2725
2726static irqreturn_t do_hpsa_intr(int irq, void *dev_id)
2727{
2728 struct ctlr_info *h = dev_id;
2729 struct CommandList *c;
2730 unsigned long flags;
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06002731 u32 raw_tag, tag, tag_index;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08002732 struct hlist_node *tmp;
2733
2734 if (interrupt_not_for_us(h))
2735 return IRQ_NONE;
2736 spin_lock_irqsave(&h->lock, flags);
2737 while (interrupt_pending(h)) {
2738 while ((raw_tag = get_next_completion(h)) != FIFO_EMPTY) {
2739 if (likely(HPSA_TAG_CONTAINS_INDEX(raw_tag))) {
2740 tag_index = HPSA_TAG_TO_INDEX(raw_tag);
2741 if (bad_tag(h, tag_index, raw_tag))
2742 return IRQ_HANDLED;
2743 c = h->cmd_pool + tag_index;
2744 finish_cmd(c, raw_tag);
2745 continue;
2746 }
2747 tag = HPSA_TAG_DISCARD_ERROR_BITS(raw_tag);
2748 c = NULL;
2749 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
2750 if (c->busaddr == tag) {
2751 finish_cmd(c, raw_tag);
2752 break;
2753 }
2754 }
2755 }
2756 }
2757 spin_unlock_irqrestore(&h->lock, flags);
2758 return IRQ_HANDLED;
2759}
2760
2761/* Send a message CDB to the firmware. */
2762static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
2763 unsigned char type)
2764{
2765 struct Command {
2766 struct CommandListHeader CommandHeader;
2767 struct RequestBlock Request;
2768 struct ErrDescriptor ErrorDescriptor;
2769 };
2770 struct Command *cmd;
2771 static const size_t cmd_sz = sizeof(*cmd) +
2772 sizeof(cmd->ErrorDescriptor);
2773 dma_addr_t paddr64;
2774 uint32_t paddr32, tag;
2775 void __iomem *vaddr;
2776 int i, err;
2777
2778 vaddr = pci_ioremap_bar(pdev, 0);
2779 if (vaddr == NULL)
2780 return -ENOMEM;
2781
2782 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
2783 * CCISS commands, so they must be allocated from the lower 4GiB of
2784 * memory.
2785 */
2786 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2787 if (err) {
2788 iounmap(vaddr);
2789 return -ENOMEM;
2790 }
2791
2792 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
2793 if (cmd == NULL) {
2794 iounmap(vaddr);
2795 return -ENOMEM;
2796 }
2797
2798 /* This must fit, because of the 32-bit consistent DMA mask. Also,
2799 * although there's no guarantee, we assume that the address is at
2800 * least 4-byte aligned (most likely, it's page-aligned).
2801 */
2802 paddr32 = paddr64;
2803
2804 cmd->CommandHeader.ReplyQueue = 0;
2805 cmd->CommandHeader.SGList = 0;
2806 cmd->CommandHeader.SGTotal = 0;
2807 cmd->CommandHeader.Tag.lower = paddr32;
2808 cmd->CommandHeader.Tag.upper = 0;
2809 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
2810
2811 cmd->Request.CDBLen = 16;
2812 cmd->Request.Type.Type = TYPE_MSG;
2813 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
2814 cmd->Request.Type.Direction = XFER_NONE;
2815 cmd->Request.Timeout = 0; /* Don't time out */
2816 cmd->Request.CDB[0] = opcode;
2817 cmd->Request.CDB[1] = type;
2818 memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
2819 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
2820 cmd->ErrorDescriptor.Addr.upper = 0;
2821 cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
2822
2823 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
2824
2825 for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
2826 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
2827 if (HPSA_TAG_DISCARD_ERROR_BITS(tag) == paddr32)
2828 break;
2829 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
2830 }
2831
2832 iounmap(vaddr);
2833
2834 /* we leak the DMA buffer here ... no choice since the controller could
2835 * still complete the command.
2836 */
2837 if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
2838 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
2839 opcode, type);
2840 return -ETIMEDOUT;
2841 }
2842
2843 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
2844
2845 if (tag & HPSA_ERROR_BIT) {
2846 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
2847 opcode, type);
2848 return -EIO;
2849 }
2850
2851 dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
2852 opcode, type);
2853 return 0;
2854}
2855
2856#define hpsa_soft_reset_controller(p) hpsa_message(p, 1, 0)
2857#define hpsa_noop(p) hpsa_message(p, 3, 0)
2858
2859static __devinit int hpsa_reset_msi(struct pci_dev *pdev)
2860{
2861/* the #defines are stolen from drivers/pci/msi.h. */
2862#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
2863#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
2864
2865 int pos;
2866 u16 control = 0;
2867
2868 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
2869 if (pos) {
2870 pci_read_config_word(pdev, msi_control_reg(pos), &control);
2871 if (control & PCI_MSI_FLAGS_ENABLE) {
2872 dev_info(&pdev->dev, "resetting MSI\n");
2873 pci_write_config_word(pdev, msi_control_reg(pos),
2874 control & ~PCI_MSI_FLAGS_ENABLE);
2875 }
2876 }
2877
2878 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
2879 if (pos) {
2880 pci_read_config_word(pdev, msi_control_reg(pos), &control);
2881 if (control & PCI_MSIX_FLAGS_ENABLE) {
2882 dev_info(&pdev->dev, "resetting MSI-X\n");
2883 pci_write_config_word(pdev, msi_control_reg(pos),
2884 control & ~PCI_MSIX_FLAGS_ENABLE);
2885 }
2886 }
2887
2888 return 0;
2889}
2890
2891/* This does a hard reset of the controller using PCI power management
2892 * states.
2893 */
2894static __devinit int hpsa_hard_reset_controller(struct pci_dev *pdev)
2895{
2896 u16 pmcsr, saved_config_space[32];
2897 int i, pos;
2898
2899 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
2900
2901 /* This is very nearly the same thing as
2902 *
2903 * pci_save_state(pci_dev);
2904 * pci_set_power_state(pci_dev, PCI_D3hot);
2905 * pci_set_power_state(pci_dev, PCI_D0);
2906 * pci_restore_state(pci_dev);
2907 *
2908 * but we can't use these nice canned kernel routines on
2909 * kexec, because they also check the MSI/MSI-X state in PCI
2910 * configuration space and do the wrong thing when it is
2911 * set/cleared. Also, the pci_save/restore_state functions
2912 * violate the ordering requirements for restoring the
2913 * configuration space from the CCISS document (see the
2914 * comment below). So we roll our own ....
2915 */
2916
2917 for (i = 0; i < 32; i++)
2918 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
2919
2920 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
2921 if (pos == 0) {
2922 dev_err(&pdev->dev,
2923 "hpsa_reset_controller: PCI PM not supported\n");
2924 return -ENODEV;
2925 }
2926
2927 /* Quoting from the Open CISS Specification: "The Power
2928 * Management Control/Status Register (CSR) controls the power
2929 * state of the device. The normal operating state is D0,
2930 * CSR=00h. The software off state is D3, CSR=03h. To reset
2931 * the controller, place the interface device in D3 then to
2932 * D0, this causes a secondary PCI reset which will reset the
2933 * controller."
2934 */
2935
2936 /* enter the D3hot power management state */
2937 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
2938 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
2939 pmcsr |= PCI_D3hot;
2940 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
2941
2942 msleep(500);
2943
2944 /* enter the D0 power management state */
2945 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
2946 pmcsr |= PCI_D0;
2947 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
2948
2949 msleep(500);
2950
2951 /* Restore the PCI configuration space. The Open CISS
2952 * Specification says, "Restore the PCI Configuration
2953 * Registers, offsets 00h through 60h. It is important to
2954 * restore the command register, 16-bits at offset 04h,
2955 * last. Do not restore the configuration status register,
2956 * 16-bits at offset 06h." Note that the offset is 2*i.
2957 */
2958 for (i = 0; i < 32; i++) {
2959 if (i == 2 || i == 3)
2960 continue;
2961 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
2962 }
2963 wmb();
2964 pci_write_config_word(pdev, 4, saved_config_space[2]);
2965
2966 return 0;
2967}
2968
2969/*
2970 * We cannot read the structure directly, for portability we must use
2971 * the io functions.
2972 * This is for debug only.
2973 */
2974#ifdef HPSA_DEBUG
2975static void print_cfg_table(struct device *dev, struct CfgTable *tb)
2976{
2977 int i;
2978 char temp_name[17];
2979
2980 dev_info(dev, "Controller Configuration information\n");
2981 dev_info(dev, "------------------------------------\n");
2982 for (i = 0; i < 4; i++)
2983 temp_name[i] = readb(&(tb->Signature[i]));
2984 temp_name[4] = '\0';
2985 dev_info(dev, " Signature = %s\n", temp_name);
2986 dev_info(dev, " Spec Number = %d\n", readl(&(tb->SpecValence)));
2987 dev_info(dev, " Transport methods supported = 0x%x\n",
2988 readl(&(tb->TransportSupport)));
2989 dev_info(dev, " Transport methods active = 0x%x\n",
2990 readl(&(tb->TransportActive)));
2991 dev_info(dev, " Requested transport Method = 0x%x\n",
2992 readl(&(tb->HostWrite.TransportRequest)));
2993 dev_info(dev, " Coalesce Interrupt Delay = 0x%x\n",
2994 readl(&(tb->HostWrite.CoalIntDelay)));
2995 dev_info(dev, " Coalesce Interrupt Count = 0x%x\n",
2996 readl(&(tb->HostWrite.CoalIntCount)));
2997 dev_info(dev, " Max outstanding commands = 0x%d\n",
2998 readl(&(tb->CmdsOutMax)));
2999 dev_info(dev, " Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3000 for (i = 0; i < 16; i++)
3001 temp_name[i] = readb(&(tb->ServerName[i]));
3002 temp_name[16] = '\0';
3003 dev_info(dev, " Server Name = %s\n", temp_name);
3004 dev_info(dev, " Heartbeat Counter = 0x%x\n\n\n",
3005 readl(&(tb->HeartBeat)));
3006}
3007#endif /* HPSA_DEBUG */
3008
3009static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3010{
3011 int i, offset, mem_type, bar_type;
3012
3013 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3014 return 0;
3015 offset = 0;
3016 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3017 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3018 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3019 offset += 4;
3020 else {
3021 mem_type = pci_resource_flags(pdev, i) &
3022 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3023 switch (mem_type) {
3024 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3025 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3026 offset += 4; /* 32 bit */
3027 break;
3028 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3029 offset += 8;
3030 break;
3031 default: /* reserved in PCI 2.2 */
3032 dev_warn(&pdev->dev,
3033 "base address is invalid\n");
3034 return -1;
3035 break;
3036 }
3037 }
3038 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3039 return i + 1;
3040 }
3041 return -1;
3042}
3043
3044/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3045 * controllers that are capable. If not, we use IO-APIC mode.
3046 */
3047
3048static void __devinit hpsa_interrupt_mode(struct ctlr_info *h,
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06003049 struct pci_dev *pdev, u32 board_id)
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003050{
3051#ifdef CONFIG_PCI_MSI
3052 int err;
3053 struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1},
3054 {0, 2}, {0, 3}
3055 };
3056
3057 /* Some boards advertise MSI but don't really support it */
3058 if ((board_id == 0x40700E11) ||
3059 (board_id == 0x40800E11) ||
3060 (board_id == 0x40820E11) || (board_id == 0x40830E11))
3061 goto default_int_mode;
3062 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3063 dev_info(&pdev->dev, "MSIX\n");
3064 err = pci_enable_msix(pdev, hpsa_msix_entries, 4);
3065 if (!err) {
3066 h->intr[0] = hpsa_msix_entries[0].vector;
3067 h->intr[1] = hpsa_msix_entries[1].vector;
3068 h->intr[2] = hpsa_msix_entries[2].vector;
3069 h->intr[3] = hpsa_msix_entries[3].vector;
3070 h->msix_vector = 1;
3071 return;
3072 }
3073 if (err > 0) {
3074 dev_warn(&pdev->dev, "only %d MSI-X vectors "
3075 "available\n", err);
3076 goto default_int_mode;
3077 } else {
3078 dev_warn(&pdev->dev, "MSI-X init failed %d\n",
3079 err);
3080 goto default_int_mode;
3081 }
3082 }
3083 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3084 dev_info(&pdev->dev, "MSI\n");
3085 if (!pci_enable_msi(pdev))
3086 h->msi_vector = 1;
3087 else
3088 dev_warn(&pdev->dev, "MSI init failed\n");
3089 }
3090default_int_mode:
3091#endif /* CONFIG_PCI_MSI */
3092 /* if we get here we're going to use the default interrupt mode */
3093 h->intr[SIMPLE_MODE_INT] = pdev->irq;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003094}
3095
3096static int hpsa_pci_init(struct ctlr_info *h, struct pci_dev *pdev)
3097{
3098 ushort subsystem_vendor_id, subsystem_device_id, command;
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06003099 u32 board_id, scratchpad = 0;
3100 u64 cfg_offset;
3101 u32 cfg_base_addr;
3102 u64 cfg_base_addr_index;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003103 int i, prod_index, err;
3104
3105 subsystem_vendor_id = pdev->subsystem_vendor;
3106 subsystem_device_id = pdev->subsystem_device;
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06003107 board_id = (((u32) (subsystem_device_id << 16) & 0xffff0000) |
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003108 subsystem_vendor_id);
3109
3110 for (i = 0; i < ARRAY_SIZE(products); i++)
3111 if (board_id == products[i].board_id)
3112 break;
3113
3114 prod_index = i;
3115
3116 if (prod_index == ARRAY_SIZE(products)) {
3117 prod_index--;
3118 if (subsystem_vendor_id != PCI_VENDOR_ID_HP ||
3119 !hpsa_allow_any) {
3120 dev_warn(&pdev->dev, "unrecognized board ID:"
3121 " 0x%08lx, ignoring.\n",
3122 (unsigned long) board_id);
3123 return -ENODEV;
3124 }
3125 }
3126 /* check to see if controller has been disabled
3127 * BEFORE trying to enable it
3128 */
3129 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3130 if (!(command & 0x02)) {
3131 dev_warn(&pdev->dev, "controller appears to be disabled\n");
3132 return -ENODEV;
3133 }
3134
3135 err = pci_enable_device(pdev);
3136 if (err) {
3137 dev_warn(&pdev->dev, "unable to enable PCI device\n");
3138 return err;
3139 }
3140
3141 err = pci_request_regions(pdev, "hpsa");
3142 if (err) {
3143 dev_err(&pdev->dev, "cannot obtain PCI resources, aborting\n");
3144 return err;
3145 }
3146
3147 /* If the kernel supports MSI/MSI-X we will try to enable that,
3148 * else we use the IO-APIC interrupt assigned to us by system ROM.
3149 */
3150 hpsa_interrupt_mode(h, pdev, board_id);
3151
3152 /* find the memory BAR */
3153 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3154 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3155 break;
3156 }
3157 if (i == DEVICE_COUNT_RESOURCE) {
3158 dev_warn(&pdev->dev, "no memory BAR found\n");
3159 err = -ENODEV;
3160 goto err_out_free_res;
3161 }
3162
3163 h->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3164 * already removed
3165 */
3166
3167 h->vaddr = remap_pci_mem(h->paddr, 0x250);
3168
3169 /* Wait for the board to become ready. */
3170 for (i = 0; i < HPSA_BOARD_READY_ITERATIONS; i++) {
3171 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
3172 if (scratchpad == HPSA_FIRMWARE_READY)
3173 break;
3174 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
3175 }
3176 if (scratchpad != HPSA_FIRMWARE_READY) {
3177 dev_warn(&pdev->dev, "board not ready, timed out.\n");
3178 err = -ENODEV;
3179 goto err_out_free_res;
3180 }
3181
3182 /* get the address index number */
3183 cfg_base_addr = readl(h->vaddr + SA5_CTCFG_OFFSET);
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06003184 cfg_base_addr &= (u32) 0x0000ffff;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003185 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
3186 if (cfg_base_addr_index == -1) {
3187 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
3188 err = -ENODEV;
3189 goto err_out_free_res;
3190 }
3191
3192 cfg_offset = readl(h->vaddr + SA5_CTMEM_OFFSET);
3193 h->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3194 cfg_base_addr_index) + cfg_offset,
3195 sizeof(h->cfgtable));
3196 h->board_id = board_id;
3197
3198 /* Query controller for max supported commands: */
3199 h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3200
3201 h->product_name = products[prod_index].product_name;
3202 h->access = *(products[prod_index].access);
3203 /* Allow room for some ioctls */
3204 h->nr_cmds = h->max_commands - 4;
3205
3206 if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
3207 (readb(&h->cfgtable->Signature[1]) != 'I') ||
3208 (readb(&h->cfgtable->Signature[2]) != 'S') ||
3209 (readb(&h->cfgtable->Signature[3]) != 'S')) {
3210 dev_warn(&pdev->dev, "not a valid CISS config table\n");
3211 err = -ENODEV;
3212 goto err_out_free_res;
3213 }
3214#ifdef CONFIG_X86
3215 {
3216 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06003217 u32 prefetch;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003218 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
3219 prefetch |= 0x100;
3220 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
3221 }
3222#endif
3223
3224 /* Disabling DMA prefetch for the P600
3225 * An ASIC bug may result in a prefetch beyond
3226 * physical memory.
3227 */
3228 if (board_id == 0x3225103C) {
Stephen M. Cameron01a02ff2010-02-04 08:41:33 -06003229 u32 dma_prefetch;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003230 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
3231 dma_prefetch |= 0x8000;
3232 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
3233 }
3234
3235 h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3236 /* Update the field, and then ring the doorbell */
3237 writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
3238 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3239
3240 /* under certain very rare conditions, this can take awhile.
3241 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3242 * as we enter this code.)
3243 */
3244 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3245 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3246 break;
3247 /* delay and try again */
3248 msleep(10);
3249 }
3250
3251#ifdef HPSA_DEBUG
3252 print_cfg_table(&pdev->dev, h->cfgtable);
3253#endif /* HPSA_DEBUG */
3254
3255 if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3256 dev_warn(&pdev->dev, "unable to get board into simple mode\n");
3257 err = -ENODEV;
3258 goto err_out_free_res;
3259 }
3260 return 0;
3261
3262err_out_free_res:
3263 /*
3264 * Deliberately omit pci_disable_device(): it does something nasty to
3265 * Smart Array controllers that pci_enable_device does not undo
3266 */
3267 pci_release_regions(pdev);
3268 return err;
3269}
3270
3271static int __devinit hpsa_init_one(struct pci_dev *pdev,
3272 const struct pci_device_id *ent)
3273{
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06003274 int i, rc;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003275 int dac;
3276 struct ctlr_info *h;
3277
3278 if (number_of_controllers == 0)
3279 printk(KERN_INFO DRIVER_NAME "\n");
3280 if (reset_devices) {
3281 /* Reset the controller with a PCI power-cycle */
3282 if (hpsa_hard_reset_controller(pdev) || hpsa_reset_msi(pdev))
3283 return -ENODEV;
3284
3285 /* Some devices (notably the HP Smart Array 5i Controller)
3286 need a little pause here */
3287 msleep(HPSA_POST_RESET_PAUSE_MSECS);
3288
3289 /* Now try to get the controller to respond to a no-op */
3290 for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
3291 if (hpsa_noop(pdev) == 0)
3292 break;
3293 else
3294 dev_warn(&pdev->dev, "no-op failed%s\n",
3295 (i < 11 ? "; re-trying" : ""));
3296 }
3297 }
3298
3299 BUILD_BUG_ON(sizeof(struct CommandList) % 8);
3300 h = kzalloc(sizeof(*h), GFP_KERNEL);
3301 if (!h)
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06003302 return -ENOMEM;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003303
3304 h->busy_initializing = 1;
3305 INIT_HLIST_HEAD(&h->cmpQ);
3306 INIT_HLIST_HEAD(&h->reqQ);
3307 mutex_init(&h->busy_shutting_down);
3308 init_completion(&h->scan_wait);
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06003309 rc = hpsa_pci_init(h, pdev);
3310 if (rc != 0)
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003311 goto clean1;
3312
3313 sprintf(h->devname, "hpsa%d", number_of_controllers);
3314 h->ctlr = number_of_controllers;
3315 number_of_controllers++;
3316 h->pdev = pdev;
3317
3318 /* configure PCI DMA stuff */
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06003319 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3320 if (rc == 0) {
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003321 dac = 1;
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06003322 } else {
3323 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3324 if (rc == 0) {
3325 dac = 0;
3326 } else {
3327 dev_err(&pdev->dev, "no suitable DMA available\n");
3328 goto clean1;
3329 }
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003330 }
3331
3332 /* make sure the board interrupts are off */
3333 h->access.set_intr_mask(h, HPSA_INTR_OFF);
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06003334 rc = request_irq(h->intr[SIMPLE_MODE_INT], do_hpsa_intr,
3335 IRQF_DISABLED | IRQF_SHARED, h->devname, h);
3336 if (rc) {
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003337 dev_err(&pdev->dev, "unable to get irq %d for %s\n",
3338 h->intr[SIMPLE_MODE_INT], h->devname);
3339 goto clean2;
3340 }
3341
3342 dev_info(&pdev->dev, "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
3343 h->devname, pdev->device, pci_name(pdev),
3344 h->intr[SIMPLE_MODE_INT], dac ? "" : " not");
3345
3346 h->cmd_pool_bits =
3347 kmalloc(((h->nr_cmds + BITS_PER_LONG -
3348 1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
3349 h->cmd_pool = pci_alloc_consistent(h->pdev,
3350 h->nr_cmds * sizeof(*h->cmd_pool),
3351 &(h->cmd_pool_dhandle));
3352 h->errinfo_pool = pci_alloc_consistent(h->pdev,
3353 h->nr_cmds * sizeof(*h->errinfo_pool),
3354 &(h->errinfo_pool_dhandle));
3355 if ((h->cmd_pool_bits == NULL)
3356 || (h->cmd_pool == NULL)
3357 || (h->errinfo_pool == NULL)) {
3358 dev_err(&pdev->dev, "out of memory");
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06003359 rc = -ENOMEM;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003360 goto clean4;
3361 }
3362 spin_lock_init(&h->lock);
3363
3364 pci_set_drvdata(pdev, h);
3365 memset(h->cmd_pool_bits, 0,
3366 ((h->nr_cmds + BITS_PER_LONG -
3367 1) / BITS_PER_LONG) * sizeof(unsigned long));
3368
3369 hpsa_scsi_setup(h);
3370
3371 /* Turn the interrupts on so we can service requests */
3372 h->access.set_intr_mask(h, HPSA_INTR_ON);
3373
3374 hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */
3375 h->busy_initializing = 0;
3376 return 1;
3377
3378clean4:
3379 kfree(h->cmd_pool_bits);
3380 if (h->cmd_pool)
3381 pci_free_consistent(h->pdev,
3382 h->nr_cmds * sizeof(struct CommandList),
3383 h->cmd_pool, h->cmd_pool_dhandle);
3384 if (h->errinfo_pool)
3385 pci_free_consistent(h->pdev,
3386 h->nr_cmds * sizeof(struct ErrorInfo),
3387 h->errinfo_pool,
3388 h->errinfo_pool_dhandle);
3389 free_irq(h->intr[SIMPLE_MODE_INT], h);
3390clean2:
3391clean1:
3392 h->busy_initializing = 0;
3393 kfree(h);
Stephen M. Cameronecd9aad2010-02-04 08:41:59 -06003394 return rc;
Stephen M. Cameronedd16362009-12-08 14:09:11 -08003395}
3396
3397static void hpsa_flush_cache(struct ctlr_info *h)
3398{
3399 char *flush_buf;
3400 struct CommandList *c;
3401
3402 flush_buf = kzalloc(4, GFP_KERNEL);
3403 if (!flush_buf)
3404 return;
3405
3406 c = cmd_special_alloc(h);
3407 if (!c) {
3408 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
3409 goto out_of_memory;
3410 }
3411 fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
3412 RAID_CTLR_LUNID, TYPE_CMD);
3413 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
3414 if (c->err_info->CommandStatus != 0)
3415 dev_warn(&h->pdev->dev,
3416 "error flushing cache on controller\n");
3417 cmd_special_free(h, c);
3418out_of_memory:
3419 kfree(flush_buf);
3420}
3421
3422static void hpsa_shutdown(struct pci_dev *pdev)
3423{
3424 struct ctlr_info *h;
3425
3426 h = pci_get_drvdata(pdev);
3427 /* Turn board interrupts off and send the flush cache command
3428 * sendcmd will turn off interrupt, and send the flush...
3429 * To write all data in the battery backed cache to disks
3430 */
3431 hpsa_flush_cache(h);
3432 h->access.set_intr_mask(h, HPSA_INTR_OFF);
3433 free_irq(h->intr[2], h);
3434#ifdef CONFIG_PCI_MSI
3435 if (h->msix_vector)
3436 pci_disable_msix(h->pdev);
3437 else if (h->msi_vector)
3438 pci_disable_msi(h->pdev);
3439#endif /* CONFIG_PCI_MSI */
3440}
3441
3442static void __devexit hpsa_remove_one(struct pci_dev *pdev)
3443{
3444 struct ctlr_info *h;
3445
3446 if (pci_get_drvdata(pdev) == NULL) {
3447 dev_err(&pdev->dev, "unable to remove device \n");
3448 return;
3449 }
3450 h = pci_get_drvdata(pdev);
3451 mutex_lock(&h->busy_shutting_down);
3452 remove_from_scan_list(h);
3453 hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */
3454 hpsa_shutdown(pdev);
3455 iounmap(h->vaddr);
3456 pci_free_consistent(h->pdev,
3457 h->nr_cmds * sizeof(struct CommandList),
3458 h->cmd_pool, h->cmd_pool_dhandle);
3459 pci_free_consistent(h->pdev,
3460 h->nr_cmds * sizeof(struct ErrorInfo),
3461 h->errinfo_pool, h->errinfo_pool_dhandle);
3462 kfree(h->cmd_pool_bits);
3463 /*
3464 * Deliberately omit pci_disable_device(): it does something nasty to
3465 * Smart Array controllers that pci_enable_device does not undo
3466 */
3467 pci_release_regions(pdev);
3468 pci_set_drvdata(pdev, NULL);
3469 mutex_unlock(&h->busy_shutting_down);
3470 kfree(h);
3471}
3472
3473static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
3474 __attribute__((unused)) pm_message_t state)
3475{
3476 return -ENOSYS;
3477}
3478
3479static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
3480{
3481 return -ENOSYS;
3482}
3483
3484static struct pci_driver hpsa_pci_driver = {
3485 .name = "hpsa",
3486 .probe = hpsa_init_one,
3487 .remove = __devexit_p(hpsa_remove_one),
3488 .id_table = hpsa_pci_device_id, /* id_table */
3489 .shutdown = hpsa_shutdown,
3490 .suspend = hpsa_suspend,
3491 .resume = hpsa_resume,
3492};
3493
3494/*
3495 * This is it. Register the PCI driver information for the cards we control
3496 * the OS will call our registered routines when it finds one of our cards.
3497 */
3498static int __init hpsa_init(void)
3499{
3500 int err;
3501 /* Start the scan thread */
3502 hpsa_scan_thread = kthread_run(hpsa_scan_func, NULL, "hpsa_scan");
3503 if (IS_ERR(hpsa_scan_thread)) {
3504 err = PTR_ERR(hpsa_scan_thread);
3505 return -ENODEV;
3506 }
3507 err = pci_register_driver(&hpsa_pci_driver);
3508 if (err)
3509 kthread_stop(hpsa_scan_thread);
3510 return err;
3511}
3512
3513static void __exit hpsa_cleanup(void)
3514{
3515 pci_unregister_driver(&hpsa_pci_driver);
3516 kthread_stop(hpsa_scan_thread);
3517}
3518
3519module_init(hpsa_init);
3520module_exit(hpsa_cleanup);