[SCSI] hpsa: remove superfluous returns from void functions.
[linux-2.6.git] / drivers / scsi / hpsa.c
1 /*
2  *    Disk Array driver for HP Smart Array SAS controllers
3  *    Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
4  *
5  *    This program is free software; you can redistribute it and/or modify
6  *    it under the terms of the GNU General Public License as published by
7  *    the Free Software Foundation; version 2 of the License.
8  *
9  *    This program is distributed in the hope that it will be useful,
10  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
12  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
13  *
14  *    You should have received a copy of the GNU General Public License
15  *    along with this program; if not, write to the Free Software
16  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17  *
18  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
19  *
20  */
21
22 #include <linux/module.h>
23 #include <linux/interrupt.h>
24 #include <linux/types.h>
25 #include <linux/pci.h>
26 #include <linux/kernel.h>
27 #include <linux/slab.h>
28 #include <linux/delay.h>
29 #include <linux/fs.h>
30 #include <linux/timer.h>
31 #include <linux/seq_file.h>
32 #include <linux/init.h>
33 #include <linux/spinlock.h>
34 #include <linux/smp_lock.h>
35 #include <linux/compat.h>
36 #include <linux/blktrace_api.h>
37 #include <linux/uaccess.h>
38 #include <linux/io.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/completion.h>
41 #include <linux/moduleparam.h>
42 #include <scsi/scsi.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_host.h>
46 #include <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 */
66 MODULE_AUTHOR("Hewlett-Packard Company");
67 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
68         HPSA_DRIVER_VERSION);
69 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
70 MODULE_VERSION(HPSA_DRIVER_VERSION);
71 MODULE_LICENSE("GPL");
72
73 static int hpsa_allow_any;
74 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
75 MODULE_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 */
79 static 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
95 MODULE_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  */
101 static 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
115 static int number_of_controllers;
116
117 static irqreturn_t do_hpsa_intr(int irq, void *dev_id);
118 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
119 static void start_io(struct ctlr_info *h);
120
121 #ifdef CONFIG_COMPAT
122 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
123 #endif
124
125 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
126 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
127 static struct CommandList *cmd_alloc(struct ctlr_info *h);
128 static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
129 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
130         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
131         int cmd_type);
132
133 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
134                 void (*done)(struct scsi_cmnd *));
135
136 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
137 static int hpsa_slave_alloc(struct scsi_device *sdev);
138 static void hpsa_slave_destroy(struct scsi_device *sdev);
139
140 static ssize_t raid_level_show(struct device *dev,
141         struct device_attribute *attr, char *buf);
142 static ssize_t lunid_show(struct device *dev,
143         struct device_attribute *attr, char *buf);
144 static ssize_t unique_id_show(struct device *dev,
145         struct device_attribute *attr, char *buf);
146 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
147 static ssize_t host_store_rescan(struct device *dev,
148          struct device_attribute *attr, const char *buf, size_t count);
149 static int check_for_unit_attention(struct ctlr_info *h,
150         struct CommandList *c);
151 static void check_ioctl_unit_attention(struct ctlr_info *h,
152         struct CommandList *c);
153
154 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
155 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
156 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
157 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
158
159 static struct device_attribute *hpsa_sdev_attrs[] = {
160         &dev_attr_raid_level,
161         &dev_attr_lunid,
162         &dev_attr_unique_id,
163         NULL,
164 };
165
166 static struct device_attribute *hpsa_shost_attrs[] = {
167         &dev_attr_rescan,
168         NULL,
169 };
170
171 static 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
192 static 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
198 static struct task_struct *hpsa_scan_thread;
199 static DEFINE_MUTEX(hpsa_scan_mutex);
200 static LIST_HEAD(hpsa_scan_q);
201 static 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  **/
213 static 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  **/
260 static 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  **/
292 static 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
325 static 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
376 static 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. */
392 static inline void addQ(struct hlist_head *list, struct CommandList *c)
393 {
394         hlist_add_head(&c->list, list);
395 }
396
397 static 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
408 static 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
415 static inline int is_hba_lunid(unsigned char scsi3addr[])
416 {
417         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
418 }
419
420 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
421 {
422         return (scsi3addr[3] & 0xC0) == 0x40;
423 }
424
425 static 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
430 static ssize_t raid_level_show(struct device *dev,
431              struct device_attribute *attr, char *buf)
432 {
433         ssize_t l = 0;
434         unsigned char rlevel;
435         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);
458         if (rlevel > RAID_UNKNOWN)
459                 rlevel = RAID_UNKNOWN;
460         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
461         return l;
462 }
463
464 static 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
488 static 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
516 static 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. */
545 static 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
605 lun_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. */
624 static 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
631         BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
632
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
655 static 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
677 static 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  */
715 static 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
736 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
737         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
859 free_and_out:
860         kfree(added);
861         kfree(removed);
862 }
863
864 /*
865  * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
866  * Assume's h->devlock is held.
867  */
868 static 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. */
883 static 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
899 static void hpsa_slave_destroy(struct scsi_device *sdev)
900 {
901         /* nothing to do. */
902 }
903
904 static void hpsa_scsi_setup(struct ctlr_info *h)
905 {
906         h->ndevices = 0;
907         h->scsi_host = NULL;
908         spin_lock_init(&h->devlock);
909 }
910
911 static void complete_scsi_command(struct CommandList *cp,
912         int timeout, u32 tag)
913 {
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
1103 static 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);
1133         return -1;
1134  fail:
1135         dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc"
1136                 " failed for controller %d\n", h->ctlr);
1137         return -1;
1138 }
1139
1140 static 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
1154 static 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 {
1160         u64 addr64;
1161
1162         if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1163                 cp->Header.SGList = 0;
1164                 cp->Header.SGTotal = 0;
1165                 return;
1166         }
1167
1168         addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1169         cp->SG[0].Addr.lower =
1170           (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1171         cp->SG[0].Addr.upper =
1172           (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1173         cp->SG[0].Len = buflen;
1174         cp->Header.SGList = (u8) 1;   /* no. SGs contig in this cmd */
1175         cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1176 }
1177
1178 static 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
1188 static 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
1201 static 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
1262 static 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");
1274                 return -1;
1275         }
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
1288 static 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
1314 static 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 */
1334 static 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
1352 static 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         }
1366
1367         memset(&scsi3addr[0], 0, 8); /* address the controller */
1368
1369         fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1370                 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1371         if (extended_response)
1372                 c->Request.CDB[1] = extended_response;
1373         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1374         ei = c->err_info;
1375         if (ei->CommandStatus != 0 &&
1376             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1377                 hpsa_scsi_interpret_error(c);
1378                 rc = -1;
1379         }
1380         cmd_special_free(h, c);
1381         return rc;
1382 }
1383
1384 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1385                 struct ReportLUNdata *buf,
1386                 int bufsize, int extended_response)
1387 {
1388         return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1389 }
1390
1391 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1392                 struct ReportLUNdata *buf, int bufsize)
1393 {
1394         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1395 }
1396
1397 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1398         int bus, int target, int lun)
1399 {
1400         device->bus = bus;
1401         device->target = target;
1402         device->lun = lun;
1403 }
1404
1405 static int hpsa_update_device_info(struct ctlr_info *h,
1406         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device)
1407 {
1408 #define OBDR_TAPE_INQ_SIZE 49
1409         unsigned char *inq_buff = NULL;
1410
1411         inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1412         if (!inq_buff)
1413                 goto bail_out;
1414
1415         memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
1416         /* Do an inquiry to the device to see what it is. */
1417         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1418                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1419                 /* Inquiry failed (msg printed already) */
1420                 dev_err(&h->pdev->dev,
1421                         "hpsa_update_device_info: inquiry failed\n");
1422                 goto bail_out;
1423         }
1424
1425         /* As a side effect, record the firmware version number
1426          * if we happen to be talking to the RAID controller.
1427          */
1428         if (is_hba_lunid(scsi3addr))
1429                 memcpy(h->firm_ver, &inq_buff[32], 4);
1430
1431         this_device->devtype = (inq_buff[0] & 0x1f);
1432         memcpy(this_device->scsi3addr, scsi3addr, 8);
1433         memcpy(this_device->vendor, &inq_buff[8],
1434                 sizeof(this_device->vendor));
1435         memcpy(this_device->model, &inq_buff[16],
1436                 sizeof(this_device->model));
1437         memcpy(this_device->revision, &inq_buff[32],
1438                 sizeof(this_device->revision));
1439         memset(this_device->device_id, 0,
1440                 sizeof(this_device->device_id));
1441         hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1442                 sizeof(this_device->device_id));
1443
1444         if (this_device->devtype == TYPE_DISK &&
1445                 is_logical_dev_addr_mode(scsi3addr))
1446                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1447         else
1448                 this_device->raid_level = RAID_UNKNOWN;
1449
1450         kfree(inq_buff);
1451         return 0;
1452
1453 bail_out:
1454         kfree(inq_buff);
1455         return 1;
1456 }
1457
1458 static unsigned char *msa2xxx_model[] = {
1459         "MSA2012",
1460         "MSA2024",
1461         "MSA2312",
1462         "MSA2324",
1463         NULL,
1464 };
1465
1466 static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1467 {
1468         int i;
1469
1470         for (i = 0; msa2xxx_model[i]; i++)
1471                 if (strncmp(device->model, msa2xxx_model[i],
1472                         strlen(msa2xxx_model[i])) == 0)
1473                         return 1;
1474         return 0;
1475 }
1476
1477 /* Helper function to assign bus, target, lun mapping of devices.
1478  * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical
1479  * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1480  * Logical drive target and lun are assigned at this time, but
1481  * physical device lun and target assignment are deferred (assigned
1482  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1483  */
1484 static void figure_bus_target_lun(struct ctlr_info *h,
1485         u8 *lunaddrbytes, int *bus, int *target, int *lun,
1486         struct hpsa_scsi_dev_t *device)
1487 {
1488
1489         u32 lunid;
1490
1491         if (is_logical_dev_addr_mode(lunaddrbytes)) {
1492                 /* logical device */
1493                 memcpy(&lunid, lunaddrbytes, sizeof(lunid));
1494                 lunid = le32_to_cpu(lunid);
1495
1496                 if (is_msa2xxx(h, device)) {
1497                         *bus = 1;
1498                         *target = (lunid >> 16) & 0x3fff;
1499                         *lun = lunid & 0x00ff;
1500                 } else {
1501                         *bus = 0;
1502                         *lun = 0;
1503                         *target = lunid & 0x3fff;
1504                 }
1505         } else {
1506                 /* physical device */
1507                 if (is_hba_lunid(lunaddrbytes))
1508                         *bus = 3;
1509                 else
1510                         *bus = 2;
1511                 *target = -1;
1512                 *lun = -1; /* we will fill these in later. */
1513         }
1514 }
1515
1516 /*
1517  * If there is no lun 0 on a target, linux won't find any devices.
1518  * For the MSA2xxx boxes, we have to manually detect the enclosure
1519  * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1520  * it for some reason.  *tmpdevice is the target we're adding,
1521  * this_device is a pointer into the current element of currentsd[]
1522  * that we're building up in update_scsi_devices(), below.
1523  * lunzerobits is a bitmap that tracks which targets already have a
1524  * lun 0 assigned.
1525  * Returns 1 if an enclosure was added, 0 if not.
1526  */
1527 static int add_msa2xxx_enclosure_device(struct ctlr_info *h,
1528         struct hpsa_scsi_dev_t *tmpdevice,
1529         struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1530         int bus, int target, int lun, unsigned long lunzerobits[],
1531         int *nmsa2xxx_enclosures)
1532 {
1533         unsigned char scsi3addr[8];
1534
1535         if (test_bit(target, lunzerobits))
1536                 return 0; /* There is already a lun 0 on this target. */
1537
1538         if (!is_logical_dev_addr_mode(lunaddrbytes))
1539                 return 0; /* It's the logical targets that may lack lun 0. */
1540
1541         if (!is_msa2xxx(h, tmpdevice))
1542                 return 0; /* It's only the MSA2xxx that have this problem. */
1543
1544         if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */
1545                 return 0;
1546
1547         if (is_hba_lunid(scsi3addr))
1548                 return 0; /* Don't add the RAID controller here. */
1549
1550 #define MAX_MSA2XXX_ENCLOSURES 32
1551         if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) {
1552                 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX "
1553                         "enclosures exceeded.  Check your hardware "
1554                         "configuration.");
1555                 return 0;
1556         }
1557
1558         memset(scsi3addr, 0, 8);
1559         scsi3addr[3] = target;
1560         if (hpsa_update_device_info(h, scsi3addr, this_device))
1561                 return 0;
1562         (*nmsa2xxx_enclosures)++;
1563         hpsa_set_bus_target_lun(this_device, bus, target, 0);
1564         set_bit(target, lunzerobits);
1565         return 1;
1566 }
1567
1568 /*
1569  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
1570  * logdev.  The number of luns in physdev and logdev are returned in
1571  * *nphysicals and *nlogicals, respectively.
1572  * Returns 0 on success, -1 otherwise.
1573  */
1574 static int hpsa_gather_lun_info(struct ctlr_info *h,
1575         int reportlunsize,
1576         struct ReportLUNdata *physdev, u32 *nphysicals,
1577         struct ReportLUNdata *logdev, u32 *nlogicals)
1578 {
1579         if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1580                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1581                 return -1;
1582         }
1583         memcpy(nphysicals, &physdev->LUNListLength[0], sizeof(*nphysicals));
1584         *nphysicals = be32_to_cpu(*nphysicals) / 8;
1585 #ifdef DEBUG
1586         dev_info(&h->pdev->dev, "number of physical luns is %d\n", *nphysicals);
1587 #endif
1588         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1589                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1590                         "  %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1591                         *nphysicals - HPSA_MAX_PHYS_LUN);
1592                 *nphysicals = HPSA_MAX_PHYS_LUN;
1593         }
1594         if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1595                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1596                 return -1;
1597         }
1598         memcpy(nlogicals, &logdev->LUNListLength[0], sizeof(*nlogicals));
1599         *nlogicals = be32_to_cpu(*nlogicals) / 8;
1600 #ifdef DEBUG
1601         dev_info(&h->pdev->dev, "number of logical luns is %d\n", *nlogicals);
1602 #endif
1603         /* Reject Logicals in excess of our max capability. */
1604         if (*nlogicals > HPSA_MAX_LUN) {
1605                 dev_warn(&h->pdev->dev,
1606                         "maximum logical LUNs (%d) exceeded.  "
1607                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
1608                         *nlogicals - HPSA_MAX_LUN);
1609                         *nlogicals = HPSA_MAX_LUN;
1610         }
1611         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1612                 dev_warn(&h->pdev->dev,
1613                         "maximum logical + physical LUNs (%d) exceeded. "
1614                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1615                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1616                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1617         }
1618         return 0;
1619 }
1620
1621 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1622 {
1623         /* the idea here is we could get notified
1624          * that some devices have changed, so we do a report
1625          * physical luns and report logical luns cmd, and adjust
1626          * our list of devices accordingly.
1627          *
1628          * The scsi3addr's of devices won't change so long as the
1629          * adapter is not reset.  That means we can rescan and
1630          * tell which devices we already know about, vs. new
1631          * devices, vs.  disappearing devices.
1632          */
1633         struct ReportLUNdata *physdev_list = NULL;
1634         struct ReportLUNdata *logdev_list = NULL;
1635         unsigned char *inq_buff = NULL;
1636         u32 nphysicals = 0;
1637         u32 nlogicals = 0;
1638         u32 ndev_allocated = 0;
1639         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1640         int ncurrent = 0;
1641         int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1642         int i, nmsa2xxx_enclosures, ndevs_to_allocate;
1643         int bus, target, lun;
1644         DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR);
1645
1646         currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA,
1647                 GFP_KERNEL);
1648         physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1649         logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1650         inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1651         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1652
1653         if (!currentsd || !physdev_list || !logdev_list ||
1654                 !inq_buff || !tmpdevice) {
1655                 dev_err(&h->pdev->dev, "out of memory\n");
1656                 goto out;
1657         }
1658         memset(lunzerobits, 0, sizeof(lunzerobits));
1659
1660         if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1661                         logdev_list, &nlogicals))
1662                 goto out;
1663
1664         /* We might see up to 32 MSA2xxx enclosures, actually 8 of them
1665          * but each of them 4 times through different paths.  The plus 1
1666          * is for the RAID controller.
1667          */
1668         ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1;
1669
1670         /* Allocate the per device structures */
1671         for (i = 0; i < ndevs_to_allocate; i++) {
1672                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1673                 if (!currentsd[i]) {
1674                         dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1675                                 __FILE__, __LINE__);
1676                         goto out;
1677                 }
1678                 ndev_allocated++;
1679         }
1680
1681         /* adjust our table of devices */
1682         nmsa2xxx_enclosures = 0;
1683         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
1684                 u8 *lunaddrbytes;
1685
1686                 /* Figure out where the LUN ID info is coming from */
1687                 if (i < nphysicals)
1688                         lunaddrbytes = &physdev_list->LUN[i][0];
1689                 else
1690                         if (i < nphysicals + nlogicals)
1691                                 lunaddrbytes =
1692                                         &logdev_list->LUN[i-nphysicals][0];
1693                         else /* jam in the RAID controller at the end */
1694                                 lunaddrbytes = RAID_CTLR_LUNID;
1695
1696                 /* skip masked physical devices. */
1697                 if (lunaddrbytes[3] & 0xC0 && i < nphysicals)
1698                         continue;
1699
1700                 /* Get device type, vendor, model, device id */
1701                 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice))
1702                         continue; /* skip it if we can't talk to it. */
1703                 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun,
1704                         tmpdevice);
1705                 this_device = currentsd[ncurrent];
1706
1707                 /*
1708                  * For the msa2xxx boxes, we have to insert a LUN 0 which
1709                  * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
1710                  * is nonetheless an enclosure device there.  We have to
1711                  * present that otherwise linux won't find anything if
1712                  * there is no lun 0.
1713                  */
1714                 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device,
1715                                 lunaddrbytes, bus, target, lun, lunzerobits,
1716                                 &nmsa2xxx_enclosures)) {
1717                         ncurrent++;
1718                         this_device = currentsd[ncurrent];
1719                 }
1720
1721                 *this_device = *tmpdevice;
1722                 hpsa_set_bus_target_lun(this_device, bus, target, lun);
1723
1724                 switch (this_device->devtype) {
1725                 case TYPE_ROM: {
1726                         /* We don't *really* support actual CD-ROM devices,
1727                          * just "One Button Disaster Recovery" tape drive
1728                          * which temporarily pretends to be a CD-ROM drive.
1729                          * So we check that the device is really an OBDR tape
1730                          * device by checking for "$DR-10" in bytes 43-48 of
1731                          * the inquiry data.
1732                          */
1733                                 char obdr_sig[7];
1734 #define OBDR_TAPE_SIG "$DR-10"
1735                                 strncpy(obdr_sig, &inq_buff[43], 6);
1736                                 obdr_sig[6] = '\0';
1737                                 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1738                                         /* Not OBDR device, ignore it. */
1739                                         break;
1740                         }
1741                         ncurrent++;
1742                         break;
1743                 case TYPE_DISK:
1744                         if (i < nphysicals)
1745                                 break;
1746                         ncurrent++;
1747                         break;
1748                 case TYPE_TAPE:
1749                 case TYPE_MEDIUM_CHANGER:
1750                         ncurrent++;
1751                         break;
1752                 case TYPE_RAID:
1753                         /* Only present the Smartarray HBA as a RAID controller.
1754                          * If it's a RAID controller other than the HBA itself
1755                          * (an external RAID controller, MSA500 or similar)
1756                          * don't present it.
1757                          */
1758                         if (!is_hba_lunid(lunaddrbytes))
1759                                 break;
1760                         ncurrent++;
1761                         break;
1762                 default:
1763                         break;
1764                 }
1765                 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA)
1766                         break;
1767         }
1768         adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
1769 out:
1770         kfree(tmpdevice);
1771         for (i = 0; i < ndev_allocated; i++)
1772                 kfree(currentsd[i]);
1773         kfree(currentsd);
1774         kfree(inq_buff);
1775         kfree(physdev_list);
1776         kfree(logdev_list);
1777 }
1778
1779 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1780  * dma mapping  and fills in the scatter gather entries of the
1781  * hpsa command, cp.
1782  */
1783 static int hpsa_scatter_gather(struct pci_dev *pdev,
1784                 struct CommandList *cp,
1785                 struct scsi_cmnd *cmd)
1786 {
1787         unsigned int len;
1788         struct scatterlist *sg;
1789         u64 addr64;
1790         int use_sg, i;
1791
1792         BUG_ON(scsi_sg_count(cmd) > MAXSGENTRIES);
1793
1794         use_sg = scsi_dma_map(cmd);
1795         if (use_sg < 0)
1796                 return use_sg;
1797
1798         if (!use_sg)
1799                 goto sglist_finished;
1800
1801         scsi_for_each_sg(cmd, sg, use_sg, i) {
1802                 addr64 = (u64) sg_dma_address(sg);
1803                 len  = sg_dma_len(sg);
1804                 cp->SG[i].Addr.lower =
1805                         (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1806                 cp->SG[i].Addr.upper =
1807                         (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1808                 cp->SG[i].Len = len;
1809                 cp->SG[i].Ext = 0;  /* we are not chaining */
1810         }
1811
1812 sglist_finished:
1813
1814         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
1815         cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
1816         return 0;
1817 }
1818
1819
1820 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
1821         void (*done)(struct scsi_cmnd *))
1822 {
1823         struct ctlr_info *h;
1824         struct hpsa_scsi_dev_t *dev;
1825         unsigned char scsi3addr[8];
1826         struct CommandList *c;
1827         unsigned long flags;
1828
1829         /* Get the ptr to our adapter structure out of cmd->host. */
1830         h = sdev_to_hba(cmd->device);
1831         dev = cmd->device->hostdata;
1832         if (!dev) {
1833                 cmd->result = DID_NO_CONNECT << 16;
1834                 done(cmd);
1835                 return 0;
1836         }
1837         memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
1838
1839         /* Need a lock as this is being allocated from the pool */
1840         spin_lock_irqsave(&h->lock, flags);
1841         c = cmd_alloc(h);
1842         spin_unlock_irqrestore(&h->lock, flags);
1843         if (c == NULL) {                        /* trouble... */
1844                 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
1845                 return SCSI_MLQUEUE_HOST_BUSY;
1846         }
1847
1848         /* Fill in the command list header */
1849
1850         cmd->scsi_done = done;    /* save this for use by completion code */
1851
1852         /* save c in case we have to abort it  */
1853         cmd->host_scribble = (unsigned char *) c;
1854
1855         c->cmd_type = CMD_SCSI;
1856         c->scsi_cmd = cmd;
1857         c->Header.ReplyQueue = 0;  /* unused in simple mode */
1858         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1859         c->Header.Tag.lower = c->busaddr;  /* Use k. address of cmd as tag */
1860
1861         /* Fill in the request block... */
1862
1863         c->Request.Timeout = 0;
1864         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1865         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1866         c->Request.CDBLen = cmd->cmd_len;
1867         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1868         c->Request.Type.Type = TYPE_CMD;
1869         c->Request.Type.Attribute = ATTR_SIMPLE;
1870         switch (cmd->sc_data_direction) {
1871         case DMA_TO_DEVICE:
1872                 c->Request.Type.Direction = XFER_WRITE;
1873                 break;
1874         case DMA_FROM_DEVICE:
1875                 c->Request.Type.Direction = XFER_READ;
1876                 break;
1877         case DMA_NONE:
1878                 c->Request.Type.Direction = XFER_NONE;
1879                 break;
1880         case DMA_BIDIRECTIONAL:
1881                 /* This can happen if a buggy application does a scsi passthru
1882                  * and sets both inlen and outlen to non-zero. ( see
1883                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1884                  */
1885
1886                 c->Request.Type.Direction = XFER_RSVD;
1887                 /* This is technically wrong, and hpsa controllers should
1888                  * reject it with CMD_INVALID, which is the most correct
1889                  * response, but non-fibre backends appear to let it
1890                  * slide by, and give the same results as if this field
1891                  * were set correctly.  Either way is acceptable for
1892                  * our purposes here.
1893                  */
1894
1895                 break;
1896
1897         default:
1898                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
1899                         cmd->sc_data_direction);
1900                 BUG();
1901                 break;
1902         }
1903
1904         if (hpsa_scatter_gather(h->pdev, c, cmd) < 0) { /* Fill SG list */
1905                 cmd_free(h, c);
1906                 return SCSI_MLQUEUE_HOST_BUSY;
1907         }
1908         enqueue_cmd_and_start_io(h, c);
1909         /* the cmd'll come back via intr handler in complete_scsi_command()  */
1910         return 0;
1911 }
1912
1913 static void hpsa_unregister_scsi(struct ctlr_info *h)
1914 {
1915         /* we are being forcibly unloaded, and may not refuse. */
1916         scsi_remove_host(h->scsi_host);
1917         scsi_host_put(h->scsi_host);
1918         h->scsi_host = NULL;
1919 }
1920
1921 static int hpsa_register_scsi(struct ctlr_info *h)
1922 {
1923         int rc;
1924
1925         hpsa_update_scsi_devices(h, -1);
1926         rc = hpsa_scsi_detect(h);
1927         if (rc != 0)
1928                 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed"
1929                         " hpsa_scsi_detect(), rc is %d\n", rc);
1930         return rc;
1931 }
1932
1933 static int wait_for_device_to_become_ready(struct ctlr_info *h,
1934         unsigned char lunaddr[])
1935 {
1936         int rc = 0;
1937         int count = 0;
1938         int waittime = 1; /* seconds */
1939         struct CommandList *c;
1940
1941         c = cmd_special_alloc(h);
1942         if (!c) {
1943                 dev_warn(&h->pdev->dev, "out of memory in "
1944                         "wait_for_device_to_become_ready.\n");
1945                 return IO_ERROR;
1946         }
1947
1948         /* Send test unit ready until device ready, or give up. */
1949         while (count < HPSA_TUR_RETRY_LIMIT) {
1950
1951                 /* Wait for a bit.  do this first, because if we send
1952                  * the TUR right away, the reset will just abort it.
1953                  */
1954                 msleep(1000 * waittime);
1955                 count++;
1956
1957                 /* Increase wait time with each try, up to a point. */
1958                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
1959                         waittime = waittime * 2;
1960
1961                 /* Send the Test Unit Ready */
1962                 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
1963                 hpsa_scsi_do_simple_cmd_core(h, c);
1964                 /* no unmap needed here because no data xfer. */
1965
1966                 if (c->err_info->CommandStatus == CMD_SUCCESS)
1967                         break;
1968
1969                 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1970                         c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
1971                         (c->err_info->SenseInfo[2] == NO_SENSE ||
1972                         c->err_info->SenseInfo[2] == UNIT_ATTENTION))
1973                         break;
1974
1975                 dev_warn(&h->pdev->dev, "waiting %d secs "
1976                         "for device to become ready.\n", waittime);
1977                 rc = 1; /* device not ready. */
1978         }
1979
1980         if (rc)
1981                 dev_warn(&h->pdev->dev, "giving up on device.\n");
1982         else
1983                 dev_warn(&h->pdev->dev, "device is ready.\n");
1984
1985         cmd_special_free(h, c);
1986         return rc;
1987 }
1988
1989 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
1990  * complaining.  Doing a host- or bus-reset can't do anything good here.
1991  */
1992 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
1993 {
1994         int rc;
1995         struct ctlr_info *h;
1996         struct hpsa_scsi_dev_t *dev;
1997
1998         /* find the controller to which the command to be aborted was sent */
1999         h = sdev_to_hba(scsicmd->device);
2000         if (h == NULL) /* paranoia */
2001                 return FAILED;
2002         dev_warn(&h->pdev->dev, "resetting drive\n");
2003
2004         dev = scsicmd->device->hostdata;
2005         if (!dev) {
2006                 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2007                         "device lookup failed.\n");
2008                 return FAILED;
2009         }
2010         /* send a reset to the SCSI LUN which the command was sent to */
2011         rc = hpsa_send_reset(h, dev->scsi3addr);
2012         if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2013                 return SUCCESS;
2014
2015         dev_warn(&h->pdev->dev, "resetting device failed.\n");
2016         return FAILED;
2017 }
2018
2019 /*
2020  * For operations that cannot sleep, a command block is allocated at init,
2021  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2022  * which ones are free or in use.  Lock must be held when calling this.
2023  * cmd_free() is the complement.
2024  */
2025 static struct CommandList *cmd_alloc(struct ctlr_info *h)
2026 {
2027         struct CommandList *c;
2028         int i;
2029         union u64bit temp64;
2030         dma_addr_t cmd_dma_handle, err_dma_handle;
2031
2032         do {
2033                 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2034                 if (i == h->nr_cmds)
2035                         return NULL;
2036         } while (test_and_set_bit
2037                  (i & (BITS_PER_LONG - 1),
2038                   h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2039         c = h->cmd_pool + i;
2040         memset(c, 0, sizeof(*c));
2041         cmd_dma_handle = h->cmd_pool_dhandle
2042             + i * sizeof(*c);
2043         c->err_info = h->errinfo_pool + i;
2044         memset(c->err_info, 0, sizeof(*c->err_info));
2045         err_dma_handle = h->errinfo_pool_dhandle
2046             + i * sizeof(*c->err_info);
2047         h->nr_allocs++;
2048
2049         c->cmdindex = i;
2050
2051         INIT_HLIST_NODE(&c->list);
2052         c->busaddr = (u32) cmd_dma_handle;
2053         temp64.val = (u64) err_dma_handle;
2054         c->ErrDesc.Addr.lower = temp64.val32.lower;
2055         c->ErrDesc.Addr.upper = temp64.val32.upper;
2056         c->ErrDesc.Len = sizeof(*c->err_info);
2057
2058         c->h = h;
2059         return c;
2060 }
2061
2062 /* For operations that can wait for kmalloc to possibly sleep,
2063  * this routine can be called. Lock need not be held to call
2064  * cmd_special_alloc. cmd_special_free() is the complement.
2065  */
2066 static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2067 {
2068         struct CommandList *c;
2069         union u64bit temp64;
2070         dma_addr_t cmd_dma_handle, err_dma_handle;
2071
2072         c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2073         if (c == NULL)
2074                 return NULL;
2075         memset(c, 0, sizeof(*c));
2076
2077         c->cmdindex = -1;
2078
2079         c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2080                     &err_dma_handle);
2081
2082         if (c->err_info == NULL) {
2083                 pci_free_consistent(h->pdev,
2084                         sizeof(*c), c, cmd_dma_handle);
2085                 return NULL;
2086         }
2087         memset(c->err_info, 0, sizeof(*c->err_info));
2088
2089         INIT_HLIST_NODE(&c->list);
2090         c->busaddr = (u32) cmd_dma_handle;
2091         temp64.val = (u64) err_dma_handle;
2092         c->ErrDesc.Addr.lower = temp64.val32.lower;
2093         c->ErrDesc.Addr.upper = temp64.val32.upper;
2094         c->ErrDesc.Len = sizeof(*c->err_info);
2095
2096         c->h = h;
2097         return c;
2098 }
2099
2100 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2101 {
2102         int i;
2103
2104         i = c - h->cmd_pool;
2105         clear_bit(i & (BITS_PER_LONG - 1),
2106                   h->cmd_pool_bits + (i / BITS_PER_LONG));
2107         h->nr_frees++;
2108 }
2109
2110 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2111 {
2112         union u64bit temp64;
2113
2114         temp64.val32.lower = c->ErrDesc.Addr.lower;
2115         temp64.val32.upper = c->ErrDesc.Addr.upper;
2116         pci_free_consistent(h->pdev, sizeof(*c->err_info),
2117                             c->err_info, (dma_addr_t) temp64.val);
2118         pci_free_consistent(h->pdev, sizeof(*c),
2119                             c, (dma_addr_t) c->busaddr);
2120 }
2121
2122 #ifdef CONFIG_COMPAT
2123
2124 static int do_ioctl(struct scsi_device *dev, int cmd, void *arg)
2125 {
2126         int ret;
2127
2128         lock_kernel();
2129         ret = hpsa_ioctl(dev, cmd, arg);
2130         unlock_kernel();
2131         return ret;
2132 }
2133
2134 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg);
2135 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2136         int cmd, void *arg);
2137
2138 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2139 {
2140         switch (cmd) {
2141         case CCISS_GETPCIINFO:
2142         case CCISS_GETINTINFO:
2143         case CCISS_SETINTINFO:
2144         case CCISS_GETNODENAME:
2145         case CCISS_SETNODENAME:
2146         case CCISS_GETHEARTBEAT:
2147         case CCISS_GETBUSTYPES:
2148         case CCISS_GETFIRMVER:
2149         case CCISS_GETDRIVVER:
2150         case CCISS_REVALIDVOLS:
2151         case CCISS_DEREGDISK:
2152         case CCISS_REGNEWDISK:
2153         case CCISS_REGNEWD:
2154         case CCISS_RESCANDISK:
2155         case CCISS_GETLUNINFO:
2156                 return do_ioctl(dev, cmd, arg);
2157
2158         case CCISS_PASSTHRU32:
2159                 return hpsa_ioctl32_passthru(dev, cmd, arg);
2160         case CCISS_BIG_PASSTHRU32:
2161                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2162
2163         default:
2164                 return -ENOIOCTLCMD;
2165         }
2166 }
2167
2168 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2169 {
2170         IOCTL32_Command_struct __user *arg32 =
2171             (IOCTL32_Command_struct __user *) arg;
2172         IOCTL_Command_struct arg64;
2173         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2174         int err;
2175         u32 cp;
2176
2177         err = 0;
2178         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2179                            sizeof(arg64.LUN_info));
2180         err |= copy_from_user(&arg64.Request, &arg32->Request,
2181                            sizeof(arg64.Request));
2182         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2183                            sizeof(arg64.error_info));
2184         err |= get_user(arg64.buf_size, &arg32->buf_size);
2185         err |= get_user(cp, &arg32->buf);
2186         arg64.buf = compat_ptr(cp);
2187         err |= copy_to_user(p, &arg64, sizeof(arg64));
2188
2189         if (err)
2190                 return -EFAULT;
2191
2192         err = do_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2193         if (err)
2194                 return err;
2195         err |= copy_in_user(&arg32->error_info, &p->error_info,
2196                          sizeof(arg32->error_info));
2197         if (err)
2198                 return -EFAULT;
2199         return err;
2200 }
2201
2202 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2203         int cmd, void *arg)
2204 {
2205         BIG_IOCTL32_Command_struct __user *arg32 =
2206             (BIG_IOCTL32_Command_struct __user *) arg;
2207         BIG_IOCTL_Command_struct arg64;
2208         BIG_IOCTL_Command_struct __user *p =
2209             compat_alloc_user_space(sizeof(arg64));
2210         int err;
2211         u32 cp;
2212
2213         err = 0;
2214         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2215                            sizeof(arg64.LUN_info));
2216         err |= copy_from_user(&arg64.Request, &arg32->Request,
2217                            sizeof(arg64.Request));
2218         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2219                            sizeof(arg64.error_info));
2220         err |= get_user(arg64.buf_size, &arg32->buf_size);
2221         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2222         err |= get_user(cp, &arg32->buf);
2223         arg64.buf = compat_ptr(cp);
2224         err |= copy_to_user(p, &arg64, sizeof(arg64));
2225
2226         if (err)
2227                 return -EFAULT;
2228
2229         err = do_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2230         if (err)
2231                 return err;
2232         err |= copy_in_user(&arg32->error_info, &p->error_info,
2233                          sizeof(arg32->error_info));
2234         if (err)
2235                 return -EFAULT;
2236         return err;
2237 }
2238 #endif
2239
2240 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2241 {
2242         struct hpsa_pci_info pciinfo;
2243
2244         if (!argp)
2245                 return -EINVAL;
2246         pciinfo.domain = pci_domain_nr(h->pdev->bus);
2247         pciinfo.bus = h->pdev->bus->number;
2248         pciinfo.dev_fn = h->pdev->devfn;
2249         pciinfo.board_id = h->board_id;
2250         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2251                 return -EFAULT;
2252         return 0;
2253 }
2254
2255 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2256 {
2257         DriverVer_type DriverVer;
2258         unsigned char vmaj, vmin, vsubmin;
2259         int rc;
2260
2261         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2262                 &vmaj, &vmin, &vsubmin);
2263         if (rc != 3) {
2264                 dev_info(&h->pdev->dev, "driver version string '%s' "
2265                         "unrecognized.", HPSA_DRIVER_VERSION);
2266                 vmaj = 0;
2267                 vmin = 0;
2268                 vsubmin = 0;
2269         }
2270         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2271         if (!argp)
2272                 return -EINVAL;
2273         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2274                 return -EFAULT;
2275         return 0;
2276 }
2277
2278 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2279 {
2280         IOCTL_Command_struct iocommand;
2281         struct CommandList *c;
2282         char *buff = NULL;
2283         union u64bit temp64;
2284
2285         if (!argp)
2286                 return -EINVAL;
2287         if (!capable(CAP_SYS_RAWIO))
2288                 return -EPERM;
2289         if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2290                 return -EFAULT;
2291         if ((iocommand.buf_size < 1) &&
2292             (iocommand.Request.Type.Direction != XFER_NONE)) {
2293                 return -EINVAL;
2294         }
2295         if (iocommand.buf_size > 0) {
2296                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2297                 if (buff == NULL)
2298                         return -EFAULT;
2299         }
2300         if (iocommand.Request.Type.Direction == XFER_WRITE) {
2301                 /* Copy the data into the buffer we created */
2302                 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) {
2303                         kfree(buff);
2304                         return -EFAULT;
2305                 }
2306         } else
2307                 memset(buff, 0, iocommand.buf_size);
2308         c = cmd_special_alloc(h);
2309         if (c == NULL) {
2310                 kfree(buff);
2311                 return -ENOMEM;
2312         }
2313         /* Fill in the command type */
2314         c->cmd_type = CMD_IOCTL_PEND;
2315         /* Fill in Command Header */
2316         c->Header.ReplyQueue = 0; /* unused in simple mode */
2317         if (iocommand.buf_size > 0) {   /* buffer to fill */
2318                 c->Header.SGList = 1;
2319                 c->Header.SGTotal = 1;
2320         } else  { /* no buffers to fill */
2321                 c->Header.SGList = 0;
2322                 c->Header.SGTotal = 0;
2323         }
2324         memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2325         /* use the kernel address the cmd block for tag */
2326         c->Header.Tag.lower = c->busaddr;
2327
2328         /* Fill in Request block */
2329         memcpy(&c->Request, &iocommand.Request,
2330                 sizeof(c->Request));
2331
2332         /* Fill in the scatter gather information */
2333         if (iocommand.buf_size > 0) {
2334                 temp64.val = pci_map_single(h->pdev, buff,
2335                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2336                 c->SG[0].Addr.lower = temp64.val32.lower;
2337                 c->SG[0].Addr.upper = temp64.val32.upper;
2338                 c->SG[0].Len = iocommand.buf_size;
2339                 c->SG[0].Ext = 0; /* we are not chaining*/
2340         }
2341         hpsa_scsi_do_simple_cmd_core(h, c);
2342         hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2343         check_ioctl_unit_attention(h, c);
2344
2345         /* Copy the error information out */
2346         memcpy(&iocommand.error_info, c->err_info,
2347                 sizeof(iocommand.error_info));
2348         if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
2349                 kfree(buff);
2350                 cmd_special_free(h, c);
2351                 return -EFAULT;
2352         }
2353
2354         if (iocommand.Request.Type.Direction == XFER_READ) {
2355                 /* Copy the data out of the buffer we created */
2356                 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
2357                         kfree(buff);
2358                         cmd_special_free(h, c);
2359                         return -EFAULT;
2360                 }
2361         }
2362         kfree(buff);
2363         cmd_special_free(h, c);
2364         return 0;
2365 }
2366
2367 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2368 {
2369         BIG_IOCTL_Command_struct *ioc;
2370         struct CommandList *c;
2371         unsigned char **buff = NULL;
2372         int *buff_size = NULL;
2373         union u64bit temp64;
2374         BYTE sg_used = 0;
2375         int status = 0;
2376         int i;
2377         u32 left;
2378         u32 sz;
2379         BYTE __user *data_ptr;
2380
2381         if (!argp)
2382                 return -EINVAL;
2383         if (!capable(CAP_SYS_RAWIO))
2384                 return -EPERM;
2385         ioc = (BIG_IOCTL_Command_struct *)
2386             kmalloc(sizeof(*ioc), GFP_KERNEL);
2387         if (!ioc) {
2388                 status = -ENOMEM;
2389                 goto cleanup1;
2390         }
2391         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
2392                 status = -EFAULT;
2393                 goto cleanup1;
2394         }
2395         if ((ioc->buf_size < 1) &&
2396             (ioc->Request.Type.Direction != XFER_NONE)) {
2397                 status = -EINVAL;
2398                 goto cleanup1;
2399         }
2400         /* Check kmalloc limits  using all SGs */
2401         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
2402                 status = -EINVAL;
2403                 goto cleanup1;
2404         }
2405         if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
2406                 status = -EINVAL;
2407                 goto cleanup1;
2408         }
2409         buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
2410         if (!buff) {
2411                 status = -ENOMEM;
2412                 goto cleanup1;
2413         }
2414         buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
2415         if (!buff_size) {
2416                 status = -ENOMEM;
2417                 goto cleanup1;
2418         }
2419         left = ioc->buf_size;
2420         data_ptr = ioc->buf;
2421         while (left) {
2422                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
2423                 buff_size[sg_used] = sz;
2424                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
2425                 if (buff[sg_used] == NULL) {
2426                         status = -ENOMEM;
2427                         goto cleanup1;
2428                 }
2429                 if (ioc->Request.Type.Direction == XFER_WRITE) {
2430                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
2431                                 status = -ENOMEM;
2432                                 goto cleanup1;
2433                         }
2434                 } else
2435                         memset(buff[sg_used], 0, sz);
2436                 left -= sz;
2437                 data_ptr += sz;
2438                 sg_used++;
2439         }
2440         c = cmd_special_alloc(h);
2441         if (c == NULL) {
2442                 status = -ENOMEM;
2443                 goto cleanup1;
2444         }
2445         c->cmd_type = CMD_IOCTL_PEND;
2446         c->Header.ReplyQueue = 0;
2447
2448         if (ioc->buf_size > 0) {
2449                 c->Header.SGList = sg_used;
2450                 c->Header.SGTotal = sg_used;
2451         } else {
2452                 c->Header.SGList = 0;
2453                 c->Header.SGTotal = 0;
2454         }
2455         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
2456         c->Header.Tag.lower = c->busaddr;
2457         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
2458         if (ioc->buf_size > 0) {
2459                 int i;
2460                 for (i = 0; i < sg_used; i++) {
2461                         temp64.val = pci_map_single(h->pdev, buff[i],
2462                                     buff_size[i], PCI_DMA_BIDIRECTIONAL);
2463                         c->SG[i].Addr.lower = temp64.val32.lower;
2464                         c->SG[i].Addr.upper = temp64.val32.upper;
2465                         c->SG[i].Len = buff_size[i];
2466                         /* we are not chaining */
2467                         c->SG[i].Ext = 0;
2468                 }
2469         }
2470         hpsa_scsi_do_simple_cmd_core(h, c);
2471         hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
2472         check_ioctl_unit_attention(h, c);
2473         /* Copy the error information out */
2474         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
2475         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
2476                 cmd_special_free(h, c);
2477                 status = -EFAULT;
2478                 goto cleanup1;
2479         }
2480         if (ioc->Request.Type.Direction == XFER_READ) {
2481                 /* Copy the data out of the buffer we created */
2482                 BYTE __user *ptr = ioc->buf;
2483                 for (i = 0; i < sg_used; i++) {
2484                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
2485                                 cmd_special_free(h, c);
2486                                 status = -EFAULT;
2487                                 goto cleanup1;
2488                         }
2489                         ptr += buff_size[i];
2490                 }
2491         }
2492         cmd_special_free(h, c);
2493         status = 0;
2494 cleanup1:
2495         if (buff) {
2496                 for (i = 0; i < sg_used; i++)
2497                         kfree(buff[i]);
2498                 kfree(buff);
2499         }
2500         kfree(buff_size);
2501         kfree(ioc);
2502         return status;
2503 }
2504
2505 static void check_ioctl_unit_attention(struct ctlr_info *h,
2506         struct CommandList *c)
2507 {
2508         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2509                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
2510                 (void) check_for_unit_attention(h, c);
2511 }
2512 /*
2513  * ioctl
2514  */
2515 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
2516 {
2517         struct ctlr_info *h;
2518         void __user *argp = (void __user *)arg;
2519
2520         h = sdev_to_hba(dev);
2521
2522         switch (cmd) {
2523         case CCISS_DEREGDISK:
2524         case CCISS_REGNEWDISK:
2525         case CCISS_REGNEWD:
2526                 hpsa_update_scsi_devices(h, dev->host->host_no);
2527                 return 0;
2528         case CCISS_GETPCIINFO:
2529                 return hpsa_getpciinfo_ioctl(h, argp);
2530         case CCISS_GETDRIVVER:
2531                 return hpsa_getdrivver_ioctl(h, argp);
2532         case CCISS_PASSTHRU:
2533                 return hpsa_passthru_ioctl(h, argp);
2534         case CCISS_BIG_PASSTHRU:
2535                 return hpsa_big_passthru_ioctl(h, argp);
2536         default:
2537                 return -ENOTTY;
2538         }
2539 }
2540
2541 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
2542         void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
2543         int cmd_type)
2544 {
2545         int pci_dir = XFER_NONE;
2546
2547         c->cmd_type = CMD_IOCTL_PEND;
2548         c->Header.ReplyQueue = 0;
2549         if (buff != NULL && size > 0) {
2550                 c->Header.SGList = 1;
2551                 c->Header.SGTotal = 1;
2552         } else {
2553                 c->Header.SGList = 0;
2554                 c->Header.SGTotal = 0;
2555         }
2556         c->Header.Tag.lower = c->busaddr;
2557         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2558
2559         c->Request.Type.Type = cmd_type;
2560         if (cmd_type == TYPE_CMD) {
2561                 switch (cmd) {
2562                 case HPSA_INQUIRY:
2563                         /* are we trying to read a vital product page */
2564                         if (page_code != 0) {
2565                                 c->Request.CDB[1] = 0x01;
2566                                 c->Request.CDB[2] = page_code;
2567                         }
2568                         c->Request.CDBLen = 6;
2569                         c->Request.Type.Attribute = ATTR_SIMPLE;
2570                         c->Request.Type.Direction = XFER_READ;
2571                         c->Request.Timeout = 0;
2572                         c->Request.CDB[0] = HPSA_INQUIRY;
2573                         c->Request.CDB[4] = size & 0xFF;
2574                         break;
2575                 case HPSA_REPORT_LOG:
2576                 case HPSA_REPORT_PHYS:
2577                         /* Talking to controller so It's a physical command
2578                            mode = 00 target = 0.  Nothing to write.
2579                          */
2580                         c->Request.CDBLen = 12;
2581                         c->Request.Type.Attribute = ATTR_SIMPLE;
2582                         c->Request.Type.Direction = XFER_READ;
2583                         c->Request.Timeout = 0;
2584                         c->Request.CDB[0] = cmd;
2585                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2586                         c->Request.CDB[7] = (size >> 16) & 0xFF;
2587                         c->Request.CDB[8] = (size >> 8) & 0xFF;
2588                         c->Request.CDB[9] = size & 0xFF;
2589                         break;
2590
2591                 case HPSA_READ_CAPACITY:
2592                         c->Request.CDBLen = 10;
2593                         c->Request.Type.Attribute = ATTR_SIMPLE;
2594                         c->Request.Type.Direction = XFER_READ;
2595                         c->Request.Timeout = 0;
2596                         c->Request.CDB[0] = cmd;
2597                         break;
2598                 case HPSA_CACHE_FLUSH:
2599                         c->Request.CDBLen = 12;
2600                         c->Request.Type.Attribute = ATTR_SIMPLE;
2601                         c->Request.Type.Direction = XFER_WRITE;
2602                         c->Request.Timeout = 0;
2603                         c->Request.CDB[0] = BMIC_WRITE;
2604                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2605                         break;
2606                 case TEST_UNIT_READY:
2607                         c->Request.CDBLen = 6;
2608                         c->Request.Type.Attribute = ATTR_SIMPLE;
2609                         c->Request.Type.Direction = XFER_NONE;
2610                         c->Request.Timeout = 0;
2611                         break;
2612                 default:
2613                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
2614                         BUG();
2615                         return;
2616                 }
2617         } else if (cmd_type == TYPE_MSG) {
2618                 switch (cmd) {
2619
2620                 case  HPSA_DEVICE_RESET_MSG:
2621                         c->Request.CDBLen = 16;
2622                         c->Request.Type.Type =  1; /* It is a MSG not a CMD */
2623                         c->Request.Type.Attribute = ATTR_SIMPLE;
2624                         c->Request.Type.Direction = XFER_NONE;
2625                         c->Request.Timeout = 0; /* Don't time out */
2626                         c->Request.CDB[0] =  0x01; /* RESET_MSG is 0x01 */
2627                         c->Request.CDB[1] = 0x03;  /* Reset target above */
2628                         /* If bytes 4-7 are zero, it means reset the */
2629                         /* LunID device */
2630                         c->Request.CDB[4] = 0x00;
2631                         c->Request.CDB[5] = 0x00;
2632                         c->Request.CDB[6] = 0x00;
2633                         c->Request.CDB[7] = 0x00;
2634                 break;
2635
2636                 default:
2637                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
2638                                 cmd);
2639                         BUG();
2640                 }
2641         } else {
2642                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
2643                 BUG();
2644         }
2645
2646         switch (c->Request.Type.Direction) {
2647         case XFER_READ:
2648                 pci_dir = PCI_DMA_FROMDEVICE;
2649                 break;
2650         case XFER_WRITE:
2651                 pci_dir = PCI_DMA_TODEVICE;
2652                 break;
2653         case XFER_NONE:
2654                 pci_dir = PCI_DMA_NONE;
2655                 break;
2656         default:
2657                 pci_dir = PCI_DMA_BIDIRECTIONAL;
2658         }
2659
2660         hpsa_map_one(h->pdev, c, buff, size, pci_dir);
2661
2662         return;
2663 }
2664
2665 /*
2666  * Map (physical) PCI mem into (virtual) kernel space
2667  */
2668 static void __iomem *remap_pci_mem(ulong base, ulong size)
2669 {
2670         ulong page_base = ((ulong) base) & PAGE_MASK;
2671         ulong page_offs = ((ulong) base) - page_base;
2672         void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2673
2674         return page_remapped ? (page_remapped + page_offs) : NULL;
2675 }
2676
2677 /* Takes cmds off the submission queue and sends them to the hardware,
2678  * then puts them on the queue of cmds waiting for completion.
2679  */
2680 static void start_io(struct ctlr_info *h)
2681 {
2682         struct CommandList *c;
2683
2684         while (!hlist_empty(&h->reqQ)) {
2685                 c = hlist_entry(h->reqQ.first, struct CommandList, list);
2686                 /* can't do anything if fifo is full */
2687                 if ((h->access.fifo_full(h))) {
2688                         dev_warn(&h->pdev->dev, "fifo full\n");
2689                         break;
2690                 }
2691
2692                 /* Get the first entry from the Request Q */
2693                 removeQ(c);
2694                 h->Qdepth--;
2695
2696                 /* Tell the controller execute command */
2697                 h->access.submit_command(h, c);
2698
2699                 /* Put job onto the completed Q */
2700                 addQ(&h->cmpQ, c);
2701         }
2702 }
2703
2704 static inline unsigned long get_next_completion(struct ctlr_info *h)
2705 {
2706         return h->access.command_completed(h);
2707 }
2708
2709 static inline int interrupt_pending(struct ctlr_info *h)
2710 {
2711         return h->access.intr_pending(h);
2712 }
2713
2714 static inline long interrupt_not_for_us(struct ctlr_info *h)
2715 {
2716         return ((h->access.intr_pending(h) == 0) ||
2717                  (h->interrupts_enabled == 0));
2718 }
2719
2720 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
2721         u32 raw_tag)
2722 {
2723         if (unlikely(tag_index >= h->nr_cmds)) {
2724                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
2725                 return 1;
2726         }
2727         return 0;
2728 }
2729
2730 static inline void finish_cmd(struct CommandList *c, u32 raw_tag)
2731 {
2732         removeQ(c);
2733         if (likely(c->cmd_type == CMD_SCSI))
2734                 complete_scsi_command(c, 0, raw_tag);
2735         else if (c->cmd_type == CMD_IOCTL_PEND)
2736                 complete(c->waiting);
2737 }
2738
2739 static irqreturn_t do_hpsa_intr(int irq, void *dev_id)
2740 {
2741         struct ctlr_info *h = dev_id;
2742         struct CommandList *c;
2743         unsigned long flags;
2744         u32 raw_tag, tag, tag_index;
2745         struct hlist_node *tmp;
2746
2747         if (interrupt_not_for_us(h))
2748                 return IRQ_NONE;
2749         spin_lock_irqsave(&h->lock, flags);
2750         while (interrupt_pending(h)) {
2751                 while ((raw_tag = get_next_completion(h)) != FIFO_EMPTY) {
2752                         if (likely(HPSA_TAG_CONTAINS_INDEX(raw_tag))) {
2753                                 tag_index = HPSA_TAG_TO_INDEX(raw_tag);
2754                                 if (bad_tag(h, tag_index, raw_tag))
2755                                         return IRQ_HANDLED;
2756                                 c = h->cmd_pool + tag_index;
2757                                 finish_cmd(c, raw_tag);
2758                                 continue;
2759                         }
2760                         tag = HPSA_TAG_DISCARD_ERROR_BITS(raw_tag);
2761                         c = NULL;
2762                         hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
2763                                 if (c->busaddr == tag) {
2764                                         finish_cmd(c, raw_tag);
2765                                         break;
2766                                 }
2767                         }
2768                 }
2769         }
2770         spin_unlock_irqrestore(&h->lock, flags);
2771         return IRQ_HANDLED;
2772 }
2773
2774 /* Send a message CDB to the firmware. */
2775 static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
2776                                                 unsigned char type)
2777 {
2778         struct Command {
2779                 struct CommandListHeader CommandHeader;
2780                 struct RequestBlock Request;
2781                 struct ErrDescriptor ErrorDescriptor;
2782         };
2783         struct Command *cmd;
2784         static const size_t cmd_sz = sizeof(*cmd) +
2785                                         sizeof(cmd->ErrorDescriptor);
2786         dma_addr_t paddr64;
2787         uint32_t paddr32, tag;
2788         void __iomem *vaddr;
2789         int i, err;
2790
2791         vaddr = pci_ioremap_bar(pdev, 0);
2792         if (vaddr == NULL)
2793                 return -ENOMEM;
2794
2795         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
2796          * CCISS commands, so they must be allocated from the lower 4GiB of
2797          * memory.
2798          */
2799         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2800         if (err) {
2801                 iounmap(vaddr);
2802                 return -ENOMEM;
2803         }
2804
2805         cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
2806         if (cmd == NULL) {
2807                 iounmap(vaddr);
2808                 return -ENOMEM;
2809         }
2810
2811         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
2812          * although there's no guarantee, we assume that the address is at
2813          * least 4-byte aligned (most likely, it's page-aligned).
2814          */
2815         paddr32 = paddr64;
2816
2817         cmd->CommandHeader.ReplyQueue = 0;
2818         cmd->CommandHeader.SGList = 0;
2819         cmd->CommandHeader.SGTotal = 0;
2820         cmd->CommandHeader.Tag.lower = paddr32;
2821         cmd->CommandHeader.Tag.upper = 0;
2822         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
2823
2824         cmd->Request.CDBLen = 16;
2825         cmd->Request.Type.Type = TYPE_MSG;
2826         cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
2827         cmd->Request.Type.Direction = XFER_NONE;
2828         cmd->Request.Timeout = 0; /* Don't time out */
2829         cmd->Request.CDB[0] = opcode;
2830         cmd->Request.CDB[1] = type;
2831         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
2832         cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
2833         cmd->ErrorDescriptor.Addr.upper = 0;
2834         cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
2835
2836         writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
2837
2838         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
2839                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
2840                 if (HPSA_TAG_DISCARD_ERROR_BITS(tag) == paddr32)
2841                         break;
2842                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
2843         }
2844
2845         iounmap(vaddr);
2846
2847         /* we leak the DMA buffer here ... no choice since the controller could
2848          *  still complete the command.
2849          */
2850         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
2851                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
2852                         opcode, type);
2853                 return -ETIMEDOUT;
2854         }
2855
2856         pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
2857
2858         if (tag & HPSA_ERROR_BIT) {
2859                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
2860                         opcode, type);
2861                 return -EIO;
2862         }
2863
2864         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
2865                 opcode, type);
2866         return 0;
2867 }
2868
2869 #define hpsa_soft_reset_controller(p) hpsa_message(p, 1, 0)
2870 #define hpsa_noop(p) hpsa_message(p, 3, 0)
2871
2872 static __devinit int hpsa_reset_msi(struct pci_dev *pdev)
2873 {
2874 /* the #defines are stolen from drivers/pci/msi.h. */
2875 #define msi_control_reg(base)           (base + PCI_MSI_FLAGS)
2876 #define PCI_MSIX_FLAGS_ENABLE           (1 << 15)
2877
2878         int pos;
2879         u16 control = 0;
2880
2881         pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
2882         if (pos) {
2883                 pci_read_config_word(pdev, msi_control_reg(pos), &control);
2884                 if (control & PCI_MSI_FLAGS_ENABLE) {
2885                         dev_info(&pdev->dev, "resetting MSI\n");
2886                         pci_write_config_word(pdev, msi_control_reg(pos),
2887                                         control & ~PCI_MSI_FLAGS_ENABLE);
2888                 }
2889         }
2890
2891         pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
2892         if (pos) {
2893                 pci_read_config_word(pdev, msi_control_reg(pos), &control);
2894                 if (control & PCI_MSIX_FLAGS_ENABLE) {
2895                         dev_info(&pdev->dev, "resetting MSI-X\n");
2896                         pci_write_config_word(pdev, msi_control_reg(pos),
2897                                         control & ~PCI_MSIX_FLAGS_ENABLE);
2898                 }
2899         }
2900
2901         return 0;
2902 }
2903
2904 /* This does a hard reset of the controller using PCI power management
2905  * states.
2906  */
2907 static __devinit int hpsa_hard_reset_controller(struct pci_dev *pdev)
2908 {
2909         u16 pmcsr, saved_config_space[32];
2910         int i, pos;
2911
2912         dev_info(&pdev->dev, "using PCI PM to reset controller\n");
2913
2914         /* This is very nearly the same thing as
2915          *
2916          * pci_save_state(pci_dev);
2917          * pci_set_power_state(pci_dev, PCI_D3hot);
2918          * pci_set_power_state(pci_dev, PCI_D0);
2919          * pci_restore_state(pci_dev);
2920          *
2921          * but we can't use these nice canned kernel routines on
2922          * kexec, because they also check the MSI/MSI-X state in PCI
2923          * configuration space and do the wrong thing when it is
2924          * set/cleared.  Also, the pci_save/restore_state functions
2925          * violate the ordering requirements for restoring the
2926          * configuration space from the CCISS document (see the
2927          * comment below).  So we roll our own ....
2928          */
2929
2930         for (i = 0; i < 32; i++)
2931                 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
2932
2933         pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
2934         if (pos == 0) {
2935                 dev_err(&pdev->dev,
2936                         "hpsa_reset_controller: PCI PM not supported\n");
2937                 return -ENODEV;
2938         }
2939
2940         /* Quoting from the Open CISS Specification: "The Power
2941          * Management Control/Status Register (CSR) controls the power
2942          * state of the device.  The normal operating state is D0,
2943          * CSR=00h.  The software off state is D3, CSR=03h.  To reset
2944          * the controller, place the interface device in D3 then to
2945          * D0, this causes a secondary PCI reset which will reset the
2946          * controller."
2947          */
2948
2949         /* enter the D3hot power management state */
2950         pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
2951         pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
2952         pmcsr |= PCI_D3hot;
2953         pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
2954
2955         msleep(500);
2956
2957         /* enter the D0 power management state */
2958         pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
2959         pmcsr |= PCI_D0;
2960         pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
2961
2962         msleep(500);
2963
2964         /* Restore the PCI configuration space.  The Open CISS
2965          * Specification says, "Restore the PCI Configuration
2966          * Registers, offsets 00h through 60h. It is important to
2967          * restore the command register, 16-bits at offset 04h,
2968          * last. Do not restore the configuration status register,
2969          * 16-bits at offset 06h."  Note that the offset is 2*i.
2970          */
2971         for (i = 0; i < 32; i++) {
2972                 if (i == 2 || i == 3)
2973                         continue;
2974                 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
2975         }
2976         wmb();
2977         pci_write_config_word(pdev, 4, saved_config_space[2]);
2978
2979         return 0;
2980 }
2981
2982 /*
2983  *  We cannot read the structure directly, for portability we must use
2984  *   the io functions.
2985  *   This is for debug only.
2986  */
2987 #ifdef HPSA_DEBUG
2988 static void print_cfg_table(struct device *dev, struct CfgTable *tb)
2989 {
2990         int i;
2991         char temp_name[17];
2992
2993         dev_info(dev, "Controller Configuration information\n");
2994         dev_info(dev, "------------------------------------\n");
2995         for (i = 0; i < 4; i++)
2996                 temp_name[i] = readb(&(tb->Signature[i]));
2997         temp_name[4] = '\0';
2998         dev_info(dev, "   Signature = %s\n", temp_name);
2999         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
3000         dev_info(dev, "   Transport methods supported = 0x%x\n",
3001                readl(&(tb->TransportSupport)));
3002         dev_info(dev, "   Transport methods active = 0x%x\n",
3003                readl(&(tb->TransportActive)));
3004         dev_info(dev, "   Requested transport Method = 0x%x\n",
3005                readl(&(tb->HostWrite.TransportRequest)));
3006         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
3007                readl(&(tb->HostWrite.CoalIntDelay)));
3008         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
3009                readl(&(tb->HostWrite.CoalIntCount)));
3010         dev_info(dev, "   Max outstanding commands = 0x%d\n",
3011                readl(&(tb->CmdsOutMax)));
3012         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3013         for (i = 0; i < 16; i++)
3014                 temp_name[i] = readb(&(tb->ServerName[i]));
3015         temp_name[16] = '\0';
3016         dev_info(dev, "   Server Name = %s\n", temp_name);
3017         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
3018                 readl(&(tb->HeartBeat)));
3019 }
3020 #endif                          /* HPSA_DEBUG */
3021
3022 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3023 {
3024         int i, offset, mem_type, bar_type;
3025
3026         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3027                 return 0;
3028         offset = 0;
3029         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3030                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3031                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3032                         offset += 4;
3033                 else {
3034                         mem_type = pci_resource_flags(pdev, i) &
3035                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3036                         switch (mem_type) {
3037                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
3038                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3039                                 offset += 4;    /* 32 bit */
3040                                 break;
3041                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
3042                                 offset += 8;
3043                                 break;
3044                         default:        /* reserved in PCI 2.2 */
3045                                 dev_warn(&pdev->dev,
3046                                        "base address is invalid\n");
3047                                 return -1;
3048                                 break;
3049                         }
3050                 }
3051                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3052                         return i + 1;
3053         }
3054         return -1;
3055 }
3056
3057 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3058  * controllers that are capable. If not, we use IO-APIC mode.
3059  */
3060
3061 static void __devinit hpsa_interrupt_mode(struct ctlr_info *h,
3062                                            struct pci_dev *pdev, u32 board_id)
3063 {
3064 #ifdef CONFIG_PCI_MSI
3065         int err;
3066         struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1},
3067         {0, 2}, {0, 3}
3068         };
3069
3070         /* Some boards advertise MSI but don't really support it */
3071         if ((board_id == 0x40700E11) ||
3072             (board_id == 0x40800E11) ||
3073             (board_id == 0x40820E11) || (board_id == 0x40830E11))
3074                 goto default_int_mode;
3075         if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3076                 dev_info(&pdev->dev, "MSIX\n");
3077                 err = pci_enable_msix(pdev, hpsa_msix_entries, 4);
3078                 if (!err) {
3079                         h->intr[0] = hpsa_msix_entries[0].vector;
3080                         h->intr[1] = hpsa_msix_entries[1].vector;
3081                         h->intr[2] = hpsa_msix_entries[2].vector;
3082                         h->intr[3] = hpsa_msix_entries[3].vector;
3083                         h->msix_vector = 1;
3084                         return;
3085                 }
3086                 if (err > 0) {
3087                         dev_warn(&pdev->dev, "only %d MSI-X vectors "
3088                                "available\n", err);
3089                         goto default_int_mode;
3090                 } else {
3091                         dev_warn(&pdev->dev, "MSI-X init failed %d\n",
3092                                err);
3093                         goto default_int_mode;
3094                 }
3095         }
3096         if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3097                 dev_info(&pdev->dev, "MSI\n");
3098                 if (!pci_enable_msi(pdev))
3099                         h->msi_vector = 1;
3100                 else
3101                         dev_warn(&pdev->dev, "MSI init failed\n");
3102         }
3103 default_int_mode:
3104 #endif                          /* CONFIG_PCI_MSI */
3105         /* if we get here we're going to use the default interrupt mode */
3106         h->intr[SIMPLE_MODE_INT] = pdev->irq;
3107 }
3108
3109 static int hpsa_pci_init(struct ctlr_info *h, struct pci_dev *pdev)
3110 {
3111         ushort subsystem_vendor_id, subsystem_device_id, command;
3112         u32 board_id, scratchpad = 0;
3113         u64 cfg_offset;
3114         u32 cfg_base_addr;
3115         u64 cfg_base_addr_index;
3116         int i, prod_index, err;
3117
3118         subsystem_vendor_id = pdev->subsystem_vendor;
3119         subsystem_device_id = pdev->subsystem_device;
3120         board_id = (((u32) (subsystem_device_id << 16) & 0xffff0000) |
3121                     subsystem_vendor_id);
3122
3123         for (i = 0; i < ARRAY_SIZE(products); i++)
3124                 if (board_id == products[i].board_id)
3125                         break;
3126
3127         prod_index = i;
3128
3129         if (prod_index == ARRAY_SIZE(products)) {
3130                 prod_index--;
3131                 if (subsystem_vendor_id != PCI_VENDOR_ID_HP ||
3132                                 !hpsa_allow_any) {
3133                         dev_warn(&pdev->dev, "unrecognized board ID:"
3134                                 " 0x%08lx, ignoring.\n",
3135                                 (unsigned long) board_id);
3136                         return -ENODEV;
3137                 }
3138         }
3139         /* check to see if controller has been disabled
3140          * BEFORE trying to enable it
3141          */
3142         (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3143         if (!(command & 0x02)) {
3144                 dev_warn(&pdev->dev, "controller appears to be disabled\n");
3145                 return -ENODEV;
3146         }
3147
3148         err = pci_enable_device(pdev);
3149         if (err) {
3150                 dev_warn(&pdev->dev, "unable to enable PCI device\n");
3151                 return err;
3152         }
3153
3154         err = pci_request_regions(pdev, "hpsa");
3155         if (err) {
3156                 dev_err(&pdev->dev, "cannot obtain PCI resources, aborting\n");
3157                 return err;
3158         }
3159
3160         /* If the kernel supports MSI/MSI-X we will try to enable that,
3161          * else we use the IO-APIC interrupt assigned to us by system ROM.
3162          */
3163         hpsa_interrupt_mode(h, pdev, board_id);
3164
3165         /* find the memory BAR */
3166         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3167                 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3168                         break;
3169         }
3170         if (i == DEVICE_COUNT_RESOURCE) {
3171                 dev_warn(&pdev->dev, "no memory BAR found\n");
3172                 err = -ENODEV;
3173                 goto err_out_free_res;
3174         }
3175
3176         h->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3177                                                  * already removed
3178                                                  */
3179
3180         h->vaddr = remap_pci_mem(h->paddr, 0x250);
3181
3182         /* Wait for the board to become ready.  */
3183         for (i = 0; i < HPSA_BOARD_READY_ITERATIONS; i++) {
3184                 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
3185                 if (scratchpad == HPSA_FIRMWARE_READY)
3186                         break;
3187                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
3188         }
3189         if (scratchpad != HPSA_FIRMWARE_READY) {
3190                 dev_warn(&pdev->dev, "board not ready, timed out.\n");
3191                 err = -ENODEV;
3192                 goto err_out_free_res;
3193         }
3194
3195         /* get the address index number */
3196         cfg_base_addr = readl(h->vaddr + SA5_CTCFG_OFFSET);
3197         cfg_base_addr &= (u32) 0x0000ffff;
3198         cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
3199         if (cfg_base_addr_index == -1) {
3200                 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
3201                 err = -ENODEV;
3202                 goto err_out_free_res;
3203         }
3204
3205         cfg_offset = readl(h->vaddr + SA5_CTMEM_OFFSET);
3206         h->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3207                                cfg_base_addr_index) + cfg_offset,
3208                                 sizeof(h->cfgtable));
3209         h->board_id = board_id;
3210
3211         /* Query controller for max supported commands: */
3212         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3213
3214         h->product_name = products[prod_index].product_name;
3215         h->access = *(products[prod_index].access);
3216         /* Allow room for some ioctls */
3217         h->nr_cmds = h->max_commands - 4;
3218
3219         if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
3220             (readb(&h->cfgtable->Signature[1]) != 'I') ||
3221             (readb(&h->cfgtable->Signature[2]) != 'S') ||
3222             (readb(&h->cfgtable->Signature[3]) != 'S')) {
3223                 dev_warn(&pdev->dev, "not a valid CISS config table\n");
3224                 err = -ENODEV;
3225                 goto err_out_free_res;
3226         }
3227 #ifdef CONFIG_X86
3228         {
3229                 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3230                 u32 prefetch;
3231                 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
3232                 prefetch |= 0x100;
3233                 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
3234         }
3235 #endif
3236
3237         /* Disabling DMA prefetch for the P600
3238          * An ASIC bug may result in a prefetch beyond
3239          * physical memory.
3240          */
3241         if (board_id == 0x3225103C) {
3242                 u32 dma_prefetch;
3243                 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
3244                 dma_prefetch |= 0x8000;
3245                 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
3246         }
3247
3248         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3249         /* Update the field, and then ring the doorbell */
3250         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
3251         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3252
3253         /* under certain very rare conditions, this can take awhile.
3254          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3255          * as we enter this code.)
3256          */
3257         for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3258                 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3259                         break;
3260                 /* delay and try again */
3261                 msleep(10);
3262         }
3263
3264 #ifdef HPSA_DEBUG
3265         print_cfg_table(&pdev->dev, h->cfgtable);
3266 #endif                          /* HPSA_DEBUG */
3267
3268         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3269                 dev_warn(&pdev->dev, "unable to get board into simple mode\n");
3270                 err = -ENODEV;
3271                 goto err_out_free_res;
3272         }
3273         return 0;
3274
3275 err_out_free_res:
3276         /*
3277          * Deliberately omit pci_disable_device(): it does something nasty to
3278          * Smart Array controllers that pci_enable_device does not undo
3279          */
3280         pci_release_regions(pdev);
3281         return err;
3282 }
3283
3284 static int __devinit hpsa_init_one(struct pci_dev *pdev,
3285                                     const struct pci_device_id *ent)
3286 {
3287         int i;
3288         int dac;
3289         struct ctlr_info *h;
3290
3291         if (number_of_controllers == 0)
3292                 printk(KERN_INFO DRIVER_NAME "\n");
3293         if (reset_devices) {
3294                 /* Reset the controller with a PCI power-cycle */
3295                 if (hpsa_hard_reset_controller(pdev) || hpsa_reset_msi(pdev))
3296                         return -ENODEV;
3297
3298                 /* Some devices (notably the HP Smart Array 5i Controller)
3299                    need a little pause here */
3300                 msleep(HPSA_POST_RESET_PAUSE_MSECS);
3301
3302                 /* Now try to get the controller to respond to a no-op */
3303                 for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
3304                         if (hpsa_noop(pdev) == 0)
3305                                 break;
3306                         else
3307                                 dev_warn(&pdev->dev, "no-op failed%s\n",
3308                                                 (i < 11 ? "; re-trying" : ""));
3309                 }
3310         }
3311
3312         BUILD_BUG_ON(sizeof(struct CommandList) % 8);
3313         h = kzalloc(sizeof(*h), GFP_KERNEL);
3314         if (!h)
3315                 return -1;
3316
3317         h->busy_initializing = 1;
3318         INIT_HLIST_HEAD(&h->cmpQ);
3319         INIT_HLIST_HEAD(&h->reqQ);
3320         mutex_init(&h->busy_shutting_down);
3321         init_completion(&h->scan_wait);
3322         if (hpsa_pci_init(h, pdev) != 0)
3323                 goto clean1;
3324
3325         sprintf(h->devname, "hpsa%d", number_of_controllers);
3326         h->ctlr = number_of_controllers;
3327         number_of_controllers++;
3328         h->pdev = pdev;
3329
3330         /* configure PCI DMA stuff */
3331         if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
3332                 dac = 1;
3333         else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
3334                 dac = 0;
3335         else {
3336                 dev_err(&pdev->dev, "no suitable DMA available\n");
3337                 goto clean1;
3338         }
3339
3340         /* make sure the board interrupts are off */
3341         h->access.set_intr_mask(h, HPSA_INTR_OFF);
3342         if (request_irq(h->intr[SIMPLE_MODE_INT], do_hpsa_intr,
3343                         IRQF_DISABLED | IRQF_SHARED, h->devname, h)) {
3344                 dev_err(&pdev->dev, "unable to get irq %d for %s\n",
3345                        h->intr[SIMPLE_MODE_INT], h->devname);
3346                 goto clean2;
3347         }
3348
3349         dev_info(&pdev->dev, "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
3350                h->devname, pdev->device, pci_name(pdev),
3351                h->intr[SIMPLE_MODE_INT], dac ? "" : " not");
3352
3353         h->cmd_pool_bits =
3354             kmalloc(((h->nr_cmds + BITS_PER_LONG -
3355                       1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
3356         h->cmd_pool = pci_alloc_consistent(h->pdev,
3357                     h->nr_cmds * sizeof(*h->cmd_pool),
3358                     &(h->cmd_pool_dhandle));
3359         h->errinfo_pool = pci_alloc_consistent(h->pdev,
3360                     h->nr_cmds * sizeof(*h->errinfo_pool),
3361                     &(h->errinfo_pool_dhandle));
3362         if ((h->cmd_pool_bits == NULL)
3363             || (h->cmd_pool == NULL)
3364             || (h->errinfo_pool == NULL)) {
3365                 dev_err(&pdev->dev, "out of memory");
3366                 goto clean4;
3367         }
3368         spin_lock_init(&h->lock);
3369
3370         pci_set_drvdata(pdev, h);
3371         memset(h->cmd_pool_bits, 0,
3372                ((h->nr_cmds + BITS_PER_LONG -
3373                  1) / BITS_PER_LONG) * sizeof(unsigned long));
3374
3375         hpsa_scsi_setup(h);
3376
3377         /* Turn the interrupts on so we can service requests */
3378         h->access.set_intr_mask(h, HPSA_INTR_ON);
3379
3380         hpsa_register_scsi(h);  /* hook ourselves into SCSI subsystem */
3381         h->busy_initializing = 0;
3382         return 1;
3383
3384 clean4:
3385         kfree(h->cmd_pool_bits);
3386         if (h->cmd_pool)
3387                 pci_free_consistent(h->pdev,
3388                             h->nr_cmds * sizeof(struct CommandList),
3389                             h->cmd_pool, h->cmd_pool_dhandle);
3390         if (h->errinfo_pool)
3391                 pci_free_consistent(h->pdev,
3392                             h->nr_cmds * sizeof(struct ErrorInfo),
3393                             h->errinfo_pool,
3394                             h->errinfo_pool_dhandle);
3395         free_irq(h->intr[SIMPLE_MODE_INT], h);
3396 clean2:
3397 clean1:
3398         h->busy_initializing = 0;
3399         kfree(h);
3400         return -1;
3401 }
3402
3403 static void hpsa_flush_cache(struct ctlr_info *h)
3404 {
3405         char *flush_buf;
3406         struct CommandList *c;
3407
3408         flush_buf = kzalloc(4, GFP_KERNEL);
3409         if (!flush_buf)
3410                 return;
3411
3412         c = cmd_special_alloc(h);
3413         if (!c) {
3414                 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
3415                 goto out_of_memory;
3416         }
3417         fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
3418                 RAID_CTLR_LUNID, TYPE_CMD);
3419         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
3420         if (c->err_info->CommandStatus != 0)
3421                 dev_warn(&h->pdev->dev,
3422                         "error flushing cache on controller\n");
3423         cmd_special_free(h, c);
3424 out_of_memory:
3425         kfree(flush_buf);
3426 }
3427
3428 static void hpsa_shutdown(struct pci_dev *pdev)
3429 {
3430         struct ctlr_info *h;
3431
3432         h = pci_get_drvdata(pdev);
3433         /* Turn board interrupts off  and send the flush cache command
3434          * sendcmd will turn off interrupt, and send the flush...
3435          * To write all data in the battery backed cache to disks
3436          */
3437         hpsa_flush_cache(h);
3438         h->access.set_intr_mask(h, HPSA_INTR_OFF);
3439         free_irq(h->intr[2], h);
3440 #ifdef CONFIG_PCI_MSI
3441         if (h->msix_vector)
3442                 pci_disable_msix(h->pdev);
3443         else if (h->msi_vector)
3444                 pci_disable_msi(h->pdev);
3445 #endif                          /* CONFIG_PCI_MSI */
3446 }
3447
3448 static void __devexit hpsa_remove_one(struct pci_dev *pdev)
3449 {
3450         struct ctlr_info *h;
3451
3452         if (pci_get_drvdata(pdev) == NULL) {
3453                 dev_err(&pdev->dev, "unable to remove device \n");
3454                 return;
3455         }
3456         h = pci_get_drvdata(pdev);
3457         mutex_lock(&h->busy_shutting_down);
3458         remove_from_scan_list(h);
3459         hpsa_unregister_scsi(h);        /* unhook from SCSI subsystem */
3460         hpsa_shutdown(pdev);
3461         iounmap(h->vaddr);
3462         pci_free_consistent(h->pdev,
3463                 h->nr_cmds * sizeof(struct CommandList),
3464                 h->cmd_pool, h->cmd_pool_dhandle);
3465         pci_free_consistent(h->pdev,
3466                 h->nr_cmds * sizeof(struct ErrorInfo),
3467                 h->errinfo_pool, h->errinfo_pool_dhandle);
3468         kfree(h->cmd_pool_bits);
3469         /*
3470          * Deliberately omit pci_disable_device(): it does something nasty to
3471          * Smart Array controllers that pci_enable_device does not undo
3472          */
3473         pci_release_regions(pdev);
3474         pci_set_drvdata(pdev, NULL);
3475         mutex_unlock(&h->busy_shutting_down);
3476         kfree(h);
3477 }
3478
3479 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
3480         __attribute__((unused)) pm_message_t state)
3481 {
3482         return -ENOSYS;
3483 }
3484
3485 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
3486 {
3487         return -ENOSYS;
3488 }
3489
3490 static struct pci_driver hpsa_pci_driver = {
3491         .name = "hpsa",
3492         .probe = hpsa_init_one,
3493         .remove = __devexit_p(hpsa_remove_one),
3494         .id_table = hpsa_pci_device_id, /* id_table */
3495         .shutdown = hpsa_shutdown,
3496         .suspend = hpsa_suspend,
3497         .resume = hpsa_resume,
3498 };
3499
3500 /*
3501  *  This is it.  Register the PCI driver information for the cards we control
3502  *  the OS will call our registered routines when it finds one of our cards.
3503  */
3504 static int __init hpsa_init(void)
3505 {
3506         int err;
3507         /* Start the scan thread */
3508         hpsa_scan_thread = kthread_run(hpsa_scan_func, NULL, "hpsa_scan");
3509         if (IS_ERR(hpsa_scan_thread)) {
3510                 err = PTR_ERR(hpsa_scan_thread);
3511                 return -ENODEV;
3512         }
3513         err = pci_register_driver(&hpsa_pci_driver);
3514         if (err)
3515                 kthread_stop(hpsa_scan_thread);
3516         return err;
3517 }
3518
3519 static void __exit hpsa_cleanup(void)
3520 {
3521         pci_unregister_driver(&hpsa_pci_driver);
3522         kthread_stop(hpsa_scan_thread);
3523 }
3524
3525 module_init(hpsa_init);
3526 module_exit(hpsa_cleanup);