2 * Disk Array driver for HP Smart Array SAS controllers
3 * Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
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.
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.
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.
18 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
22 #include <linux/module.h>
23 #include <linux/interrupt.h>
24 #include <linux/types.h>
25 #include <linux/pci.h>
26 #include <linux/pci-aspm.h>
27 #include <linux/kernel.h>
28 #include <linux/slab.h>
29 #include <linux/delay.h>
31 #include <linux/timer.h>
32 #include <linux/seq_file.h>
33 #include <linux/init.h>
34 #include <linux/spinlock.h>
35 #include <linux/compat.h>
36 #include <linux/blktrace_api.h>
37 #include <linux/uaccess.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/completion.h>
41 #include <linux/moduleparam.h>
42 #include <scsi/scsi.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_tcq.h>
47 #include <linux/cciss_ioctl.h>
48 #include <linux/string.h>
49 #include <linux/bitmap.h>
50 #include <linux/atomic.h>
51 #include <linux/kthread.h>
52 #include <linux/jiffies.h>
56 /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
57 #define HPSA_DRIVER_VERSION "2.0.2-1"
58 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
61 /* How long to wait (in milliseconds) for board to go into simple mode */
62 #define MAX_CONFIG_WAIT 30000
63 #define MAX_IOCTL_CONFIG_WAIT 1000
65 /*define how many times we will try a command because of bus resets */
66 #define MAX_CMD_RETRIES 3
68 /* Embedded module documentation macros - see modules.h */
69 MODULE_AUTHOR("Hewlett-Packard Company");
70 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
72 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
73 MODULE_VERSION(HPSA_DRIVER_VERSION);
74 MODULE_LICENSE("GPL");
76 static int hpsa_allow_any;
77 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
78 MODULE_PARM_DESC(hpsa_allow_any,
79 "Allow hpsa driver to access unknown HP Smart Array hardware");
80 static int hpsa_simple_mode;
81 module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
82 MODULE_PARM_DESC(hpsa_simple_mode,
83 "Use 'simple mode' rather than 'performant mode'");
85 /* define the PCI info for the cards we can control */
86 static const struct pci_device_id hpsa_pci_device_id[] = {
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324a},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324b},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3233},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3350},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3351},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3352},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3353},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3354},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3355},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3356},
102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1920},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1921},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1922},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1923},
106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1924},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1925},
108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1926},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSH, 0x103C, 0x1928},
110 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x334d},
111 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
112 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
116 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
118 /* board_id = Subsystem Device ID & Vendor ID
119 * product = Marketing Name for the board
120 * access = Address of the struct of function pointers
122 static struct board_type products[] = {
123 {0x3241103C, "Smart Array P212", &SA5_access},
124 {0x3243103C, "Smart Array P410", &SA5_access},
125 {0x3245103C, "Smart Array P410i", &SA5_access},
126 {0x3247103C, "Smart Array P411", &SA5_access},
127 {0x3249103C, "Smart Array P812", &SA5_access},
128 {0x324a103C, "Smart Array P712m", &SA5_access},
129 {0x324b103C, "Smart Array P711m", &SA5_access},
130 {0x3350103C, "Smart Array P222", &SA5_access},
131 {0x3351103C, "Smart Array P420", &SA5_access},
132 {0x3352103C, "Smart Array P421", &SA5_access},
133 {0x3353103C, "Smart Array P822", &SA5_access},
134 {0x3354103C, "Smart Array P420i", &SA5_access},
135 {0x3355103C, "Smart Array P220i", &SA5_access},
136 {0x3356103C, "Smart Array P721m", &SA5_access},
137 {0x1920103C, "Smart Array", &SA5_access},
138 {0x1921103C, "Smart Array", &SA5_access},
139 {0x1922103C, "Smart Array", &SA5_access},
140 {0x1923103C, "Smart Array", &SA5_access},
141 {0x1924103C, "Smart Array", &SA5_access},
142 {0x1925103C, "Smart Array", &SA5_access},
143 {0x1926103C, "Smart Array", &SA5_access},
144 {0x1928103C, "Smart Array", &SA5_access},
145 {0x334d103C, "Smart Array P822se", &SA5_access},
146 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
149 static int number_of_controllers;
151 static struct list_head hpsa_ctlr_list = LIST_HEAD_INIT(hpsa_ctlr_list);
152 static spinlock_t lockup_detector_lock;
153 static struct task_struct *hpsa_lockup_detector;
155 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
156 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
157 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
158 static void start_io(struct ctlr_info *h);
161 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
164 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
165 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
166 static struct CommandList *cmd_alloc(struct ctlr_info *h);
167 static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
168 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
169 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
172 static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
173 static void hpsa_scan_start(struct Scsi_Host *);
174 static int hpsa_scan_finished(struct Scsi_Host *sh,
175 unsigned long elapsed_time);
176 static int hpsa_change_queue_depth(struct scsi_device *sdev,
177 int qdepth, int reason);
179 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
180 static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
181 static int hpsa_slave_alloc(struct scsi_device *sdev);
182 static void hpsa_slave_destroy(struct scsi_device *sdev);
184 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
185 static int check_for_unit_attention(struct ctlr_info *h,
186 struct CommandList *c);
187 static void check_ioctl_unit_attention(struct ctlr_info *h,
188 struct CommandList *c);
189 /* performant mode helper functions */
190 static void calc_bucket_map(int *bucket, int num_buckets,
191 int nsgs, int *bucket_map);
192 static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
193 static inline u32 next_command(struct ctlr_info *h, u8 q);
194 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
195 u32 *cfg_base_addr, u64 *cfg_base_addr_index,
197 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
198 unsigned long *memory_bar);
199 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
200 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
202 static inline void finish_cmd(struct CommandList *c);
203 #define BOARD_NOT_READY 0
204 #define BOARD_READY 1
206 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
208 unsigned long *priv = shost_priv(sdev->host);
209 return (struct ctlr_info *) *priv;
212 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
214 unsigned long *priv = shost_priv(sh);
215 return (struct ctlr_info *) *priv;
218 static int check_for_unit_attention(struct ctlr_info *h,
219 struct CommandList *c)
221 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
224 switch (c->err_info->SenseInfo[12]) {
226 dev_warn(&h->pdev->dev, HPSA "%d: a state change "
227 "detected, command retried\n", h->ctlr);
230 dev_warn(&h->pdev->dev, HPSA "%d: LUN failure "
231 "detected, action required\n", h->ctlr);
233 case REPORT_LUNS_CHANGED:
234 dev_warn(&h->pdev->dev, HPSA "%d: report LUN data "
235 "changed, action required\n", h->ctlr);
237 * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
238 * target (array) devices.
242 dev_warn(&h->pdev->dev, HPSA "%d: a power on "
243 "or device reset detected\n", h->ctlr);
245 case UNIT_ATTENTION_CLEARED:
246 dev_warn(&h->pdev->dev, HPSA "%d: unit attention "
247 "cleared by another initiator\n", h->ctlr);
250 dev_warn(&h->pdev->dev, HPSA "%d: unknown "
251 "unit attention detected\n", h->ctlr);
257 static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
259 if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
260 (c->err_info->ScsiStatus != SAM_STAT_BUSY &&
261 c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
263 dev_warn(&h->pdev->dev, HPSA "device busy");
267 static ssize_t host_store_rescan(struct device *dev,
268 struct device_attribute *attr,
269 const char *buf, size_t count)
272 struct Scsi_Host *shost = class_to_shost(dev);
273 h = shost_to_hba(shost);
274 hpsa_scan_start(h->scsi_host);
278 static ssize_t host_show_firmware_revision(struct device *dev,
279 struct device_attribute *attr, char *buf)
282 struct Scsi_Host *shost = class_to_shost(dev);
283 unsigned char *fwrev;
285 h = shost_to_hba(shost);
286 if (!h->hba_inquiry_data)
288 fwrev = &h->hba_inquiry_data[32];
289 return snprintf(buf, 20, "%c%c%c%c\n",
290 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
293 static ssize_t host_show_commands_outstanding(struct device *dev,
294 struct device_attribute *attr, char *buf)
296 struct Scsi_Host *shost = class_to_shost(dev);
297 struct ctlr_info *h = shost_to_hba(shost);
299 return snprintf(buf, 20, "%d\n", h->commands_outstanding);
302 static ssize_t host_show_transport_mode(struct device *dev,
303 struct device_attribute *attr, char *buf)
306 struct Scsi_Host *shost = class_to_shost(dev);
308 h = shost_to_hba(shost);
309 return snprintf(buf, 20, "%s\n",
310 h->transMethod & CFGTBL_Trans_Performant ?
311 "performant" : "simple");
314 /* List of controllers which cannot be hard reset on kexec with reset_devices */
315 static u32 unresettable_controller[] = {
316 0x324a103C, /* Smart Array P712m */
317 0x324b103C, /* SmartArray P711m */
318 0x3223103C, /* Smart Array P800 */
319 0x3234103C, /* Smart Array P400 */
320 0x3235103C, /* Smart Array P400i */
321 0x3211103C, /* Smart Array E200i */
322 0x3212103C, /* Smart Array E200 */
323 0x3213103C, /* Smart Array E200i */
324 0x3214103C, /* Smart Array E200i */
325 0x3215103C, /* Smart Array E200i */
326 0x3237103C, /* Smart Array E500 */
327 0x323D103C, /* Smart Array P700m */
328 0x40800E11, /* Smart Array 5i */
329 0x409C0E11, /* Smart Array 6400 */
330 0x409D0E11, /* Smart Array 6400 EM */
331 0x40700E11, /* Smart Array 5300 */
332 0x40820E11, /* Smart Array 532 */
333 0x40830E11, /* Smart Array 5312 */
334 0x409A0E11, /* Smart Array 641 */
335 0x409B0E11, /* Smart Array 642 */
336 0x40910E11, /* Smart Array 6i */
339 /* List of controllers which cannot even be soft reset */
340 static u32 soft_unresettable_controller[] = {
341 0x40800E11, /* Smart Array 5i */
342 0x40700E11, /* Smart Array 5300 */
343 0x40820E11, /* Smart Array 532 */
344 0x40830E11, /* Smart Array 5312 */
345 0x409A0E11, /* Smart Array 641 */
346 0x409B0E11, /* Smart Array 642 */
347 0x40910E11, /* Smart Array 6i */
348 /* Exclude 640x boards. These are two pci devices in one slot
349 * which share a battery backed cache module. One controls the
350 * cache, the other accesses the cache through the one that controls
351 * it. If we reset the one controlling the cache, the other will
352 * likely not be happy. Just forbid resetting this conjoined mess.
353 * The 640x isn't really supported by hpsa anyway.
355 0x409C0E11, /* Smart Array 6400 */
356 0x409D0E11, /* Smart Array 6400 EM */
359 static int ctlr_is_hard_resettable(u32 board_id)
363 for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
364 if (unresettable_controller[i] == board_id)
369 static int ctlr_is_soft_resettable(u32 board_id)
373 for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
374 if (soft_unresettable_controller[i] == board_id)
379 static int ctlr_is_resettable(u32 board_id)
381 return ctlr_is_hard_resettable(board_id) ||
382 ctlr_is_soft_resettable(board_id);
385 static ssize_t host_show_resettable(struct device *dev,
386 struct device_attribute *attr, char *buf)
389 struct Scsi_Host *shost = class_to_shost(dev);
391 h = shost_to_hba(shost);
392 return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
395 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
397 return (scsi3addr[3] & 0xC0) == 0x40;
400 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
403 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
405 static ssize_t raid_level_show(struct device *dev,
406 struct device_attribute *attr, char *buf)
409 unsigned char rlevel;
411 struct scsi_device *sdev;
412 struct hpsa_scsi_dev_t *hdev;
415 sdev = to_scsi_device(dev);
416 h = sdev_to_hba(sdev);
417 spin_lock_irqsave(&h->lock, flags);
418 hdev = sdev->hostdata;
420 spin_unlock_irqrestore(&h->lock, flags);
424 /* Is this even a logical drive? */
425 if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
426 spin_unlock_irqrestore(&h->lock, flags);
427 l = snprintf(buf, PAGE_SIZE, "N/A\n");
431 rlevel = hdev->raid_level;
432 spin_unlock_irqrestore(&h->lock, flags);
433 if (rlevel > RAID_UNKNOWN)
434 rlevel = RAID_UNKNOWN;
435 l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
439 static ssize_t lunid_show(struct device *dev,
440 struct device_attribute *attr, char *buf)
443 struct scsi_device *sdev;
444 struct hpsa_scsi_dev_t *hdev;
446 unsigned char lunid[8];
448 sdev = to_scsi_device(dev);
449 h = sdev_to_hba(sdev);
450 spin_lock_irqsave(&h->lock, flags);
451 hdev = sdev->hostdata;
453 spin_unlock_irqrestore(&h->lock, flags);
456 memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
457 spin_unlock_irqrestore(&h->lock, flags);
458 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
459 lunid[0], lunid[1], lunid[2], lunid[3],
460 lunid[4], lunid[5], lunid[6], lunid[7]);
463 static ssize_t unique_id_show(struct device *dev,
464 struct device_attribute *attr, char *buf)
467 struct scsi_device *sdev;
468 struct hpsa_scsi_dev_t *hdev;
470 unsigned char sn[16];
472 sdev = to_scsi_device(dev);
473 h = sdev_to_hba(sdev);
474 spin_lock_irqsave(&h->lock, flags);
475 hdev = sdev->hostdata;
477 spin_unlock_irqrestore(&h->lock, flags);
480 memcpy(sn, hdev->device_id, sizeof(sn));
481 spin_unlock_irqrestore(&h->lock, flags);
482 return snprintf(buf, 16 * 2 + 2,
483 "%02X%02X%02X%02X%02X%02X%02X%02X"
484 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
485 sn[0], sn[1], sn[2], sn[3],
486 sn[4], sn[5], sn[6], sn[7],
487 sn[8], sn[9], sn[10], sn[11],
488 sn[12], sn[13], sn[14], sn[15]);
491 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
492 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
493 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
494 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
495 static DEVICE_ATTR(firmware_revision, S_IRUGO,
496 host_show_firmware_revision, NULL);
497 static DEVICE_ATTR(commands_outstanding, S_IRUGO,
498 host_show_commands_outstanding, NULL);
499 static DEVICE_ATTR(transport_mode, S_IRUGO,
500 host_show_transport_mode, NULL);
501 static DEVICE_ATTR(resettable, S_IRUGO,
502 host_show_resettable, NULL);
504 static struct device_attribute *hpsa_sdev_attrs[] = {
505 &dev_attr_raid_level,
511 static struct device_attribute *hpsa_shost_attrs[] = {
513 &dev_attr_firmware_revision,
514 &dev_attr_commands_outstanding,
515 &dev_attr_transport_mode,
516 &dev_attr_resettable,
520 static struct scsi_host_template hpsa_driver_template = {
521 .module = THIS_MODULE,
524 .queuecommand = hpsa_scsi_queue_command,
525 .scan_start = hpsa_scan_start,
526 .scan_finished = hpsa_scan_finished,
527 .change_queue_depth = hpsa_change_queue_depth,
529 .use_clustering = ENABLE_CLUSTERING,
530 .eh_abort_handler = hpsa_eh_abort_handler,
531 .eh_device_reset_handler = hpsa_eh_device_reset_handler,
533 .slave_alloc = hpsa_slave_alloc,
534 .slave_destroy = hpsa_slave_destroy,
536 .compat_ioctl = hpsa_compat_ioctl,
538 .sdev_attrs = hpsa_sdev_attrs,
539 .shost_attrs = hpsa_shost_attrs,
544 /* Enqueuing and dequeuing functions for cmdlists. */
545 static inline void addQ(struct list_head *list, struct CommandList *c)
547 list_add_tail(&c->list, list);
550 static inline u32 next_command(struct ctlr_info *h, u8 q)
553 struct reply_pool *rq = &h->reply_queue[q];
556 if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
557 return h->access.command_completed(h, q);
559 if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
560 a = rq->head[rq->current_entry];
562 spin_lock_irqsave(&h->lock, flags);
563 h->commands_outstanding--;
564 spin_unlock_irqrestore(&h->lock, flags);
568 /* Check for wraparound */
569 if (rq->current_entry == h->max_commands) {
570 rq->current_entry = 0;
576 /* set_performant_mode: Modify the tag for cciss performant
577 * set bit 0 for pull model, bits 3-1 for block fetch
580 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
582 if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
583 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
584 if (likely(h->msix_vector))
585 c->Header.ReplyQueue =
586 smp_processor_id() % h->nreply_queues;
590 static int is_firmware_flash_cmd(u8 *cdb)
592 return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
596 * During firmware flash, the heartbeat register may not update as frequently
597 * as it should. So we dial down lockup detection during firmware flash. and
598 * dial it back up when firmware flash completes.
600 #define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)
601 #define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)
602 static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
603 struct CommandList *c)
605 if (!is_firmware_flash_cmd(c->Request.CDB))
607 atomic_inc(&h->firmware_flash_in_progress);
608 h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
611 static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
612 struct CommandList *c)
614 if (is_firmware_flash_cmd(c->Request.CDB) &&
615 atomic_dec_and_test(&h->firmware_flash_in_progress))
616 h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
619 static void enqueue_cmd_and_start_io(struct ctlr_info *h,
620 struct CommandList *c)
624 set_performant_mode(h, c);
625 dial_down_lockup_detection_during_fw_flash(h, c);
626 spin_lock_irqsave(&h->lock, flags);
629 spin_unlock_irqrestore(&h->lock, flags);
633 static inline void removeQ(struct CommandList *c)
635 if (WARN_ON(list_empty(&c->list)))
637 list_del_init(&c->list);
640 static inline int is_hba_lunid(unsigned char scsi3addr[])
642 return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
645 static inline int is_scsi_rev_5(struct ctlr_info *h)
647 if (!h->hba_inquiry_data)
649 if ((h->hba_inquiry_data[2] & 0x07) == 5)
654 static int hpsa_find_target_lun(struct ctlr_info *h,
655 unsigned char scsi3addr[], int bus, int *target, int *lun)
657 /* finds an unused bus, target, lun for a new physical device
658 * assumes h->devlock is held
661 DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
663 bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
665 for (i = 0; i < h->ndevices; i++) {
666 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
667 __set_bit(h->dev[i]->target, lun_taken);
670 i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
671 if (i < HPSA_MAX_DEVICES) {
680 /* Add an entry into h->dev[] array. */
681 static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
682 struct hpsa_scsi_dev_t *device,
683 struct hpsa_scsi_dev_t *added[], int *nadded)
685 /* assumes h->devlock is held */
688 unsigned char addr1[8], addr2[8];
689 struct hpsa_scsi_dev_t *sd;
691 if (n >= HPSA_MAX_DEVICES) {
692 dev_err(&h->pdev->dev, "too many devices, some will be "
697 /* physical devices do not have lun or target assigned until now. */
698 if (device->lun != -1)
699 /* Logical device, lun is already assigned. */
702 /* If this device a non-zero lun of a multi-lun device
703 * byte 4 of the 8-byte LUN addr will contain the logical
704 * unit no, zero otherise.
706 if (device->scsi3addr[4] == 0) {
707 /* This is not a non-zero lun of a multi-lun device */
708 if (hpsa_find_target_lun(h, device->scsi3addr,
709 device->bus, &device->target, &device->lun) != 0)
714 /* This is a non-zero lun of a multi-lun device.
715 * Search through our list and find the device which
716 * has the same 8 byte LUN address, excepting byte 4.
717 * Assign the same bus and target for this new LUN.
718 * Use the logical unit number from the firmware.
720 memcpy(addr1, device->scsi3addr, 8);
722 for (i = 0; i < n; i++) {
724 memcpy(addr2, sd->scsi3addr, 8);
726 /* differ only in byte 4? */
727 if (memcmp(addr1, addr2, 8) == 0) {
728 device->bus = sd->bus;
729 device->target = sd->target;
730 device->lun = device->scsi3addr[4];
734 if (device->lun == -1) {
735 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
736 " suspect firmware bug or unsupported hardware "
745 added[*nadded] = device;
748 /* initially, (before registering with scsi layer) we don't
749 * know our hostno and we don't want to print anything first
750 * time anyway (the scsi layer's inquiries will show that info)
752 /* if (hostno != -1) */
753 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
754 scsi_device_type(device->devtype), hostno,
755 device->bus, device->target, device->lun);
759 /* Update an entry in h->dev[] array. */
760 static void hpsa_scsi_update_entry(struct ctlr_info *h, int hostno,
761 int entry, struct hpsa_scsi_dev_t *new_entry)
763 /* assumes h->devlock is held */
764 BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
766 /* Raid level changed. */
767 h->dev[entry]->raid_level = new_entry->raid_level;
768 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d updated.\n",
769 scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
770 new_entry->target, new_entry->lun);
773 /* Replace an entry from h->dev[] array. */
774 static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
775 int entry, struct hpsa_scsi_dev_t *new_entry,
776 struct hpsa_scsi_dev_t *added[], int *nadded,
777 struct hpsa_scsi_dev_t *removed[], int *nremoved)
779 /* assumes h->devlock is held */
780 BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
781 removed[*nremoved] = h->dev[entry];
785 * New physical devices won't have target/lun assigned yet
786 * so we need to preserve the values in the slot we are replacing.
788 if (new_entry->target == -1) {
789 new_entry->target = h->dev[entry]->target;
790 new_entry->lun = h->dev[entry]->lun;
793 h->dev[entry] = new_entry;
794 added[*nadded] = new_entry;
796 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
797 scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
798 new_entry->target, new_entry->lun);
801 /* Remove an entry from h->dev[] array. */
802 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
803 struct hpsa_scsi_dev_t *removed[], int *nremoved)
805 /* assumes h->devlock is held */
807 struct hpsa_scsi_dev_t *sd;
809 BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
812 removed[*nremoved] = h->dev[entry];
815 for (i = entry; i < h->ndevices-1; i++)
816 h->dev[i] = h->dev[i+1];
818 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
819 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
823 #define SCSI3ADDR_EQ(a, b) ( \
824 (a)[7] == (b)[7] && \
825 (a)[6] == (b)[6] && \
826 (a)[5] == (b)[5] && \
827 (a)[4] == (b)[4] && \
828 (a)[3] == (b)[3] && \
829 (a)[2] == (b)[2] && \
830 (a)[1] == (b)[1] && \
833 static void fixup_botched_add(struct ctlr_info *h,
834 struct hpsa_scsi_dev_t *added)
836 /* called when scsi_add_device fails in order to re-adjust
837 * h->dev[] to match the mid layer's view.
842 spin_lock_irqsave(&h->lock, flags);
843 for (i = 0; i < h->ndevices; i++) {
844 if (h->dev[i] == added) {
845 for (j = i; j < h->ndevices-1; j++)
846 h->dev[j] = h->dev[j+1];
851 spin_unlock_irqrestore(&h->lock, flags);
855 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
856 struct hpsa_scsi_dev_t *dev2)
858 /* we compare everything except lun and target as these
859 * are not yet assigned. Compare parts likely
862 if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
863 sizeof(dev1->scsi3addr)) != 0)
865 if (memcmp(dev1->device_id, dev2->device_id,
866 sizeof(dev1->device_id)) != 0)
868 if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
870 if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
872 if (dev1->devtype != dev2->devtype)
874 if (dev1->bus != dev2->bus)
879 static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
880 struct hpsa_scsi_dev_t *dev2)
882 /* Device attributes that can change, but don't mean
883 * that the device is a different device, nor that the OS
884 * needs to be told anything about the change.
886 if (dev1->raid_level != dev2->raid_level)
891 /* Find needle in haystack. If exact match found, return DEVICE_SAME,
892 * and return needle location in *index. If scsi3addr matches, but not
893 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
894 * location in *index.
895 * In the case of a minor device attribute change, such as RAID level, just
896 * return DEVICE_UPDATED, along with the updated device's location in index.
897 * If needle not found, return DEVICE_NOT_FOUND.
899 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
900 struct hpsa_scsi_dev_t *haystack[], int haystack_size,
904 #define DEVICE_NOT_FOUND 0
905 #define DEVICE_CHANGED 1
906 #define DEVICE_SAME 2
907 #define DEVICE_UPDATED 3
908 for (i = 0; i < haystack_size; i++) {
909 if (haystack[i] == NULL) /* previously removed. */
911 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
913 if (device_is_the_same(needle, haystack[i])) {
914 if (device_updated(needle, haystack[i]))
915 return DEVICE_UPDATED;
918 return DEVICE_CHANGED;
923 return DEVICE_NOT_FOUND;
926 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
927 struct hpsa_scsi_dev_t *sd[], int nsds)
929 /* sd contains scsi3 addresses and devtypes, and inquiry
930 * data. This function takes what's in sd to be the current
931 * reality and updates h->dev[] to reflect that reality.
933 int i, entry, device_change, changes = 0;
934 struct hpsa_scsi_dev_t *csd;
936 struct hpsa_scsi_dev_t **added, **removed;
937 int nadded, nremoved;
938 struct Scsi_Host *sh = NULL;
940 added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
941 removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
943 if (!added || !removed) {
944 dev_warn(&h->pdev->dev, "out of memory in "
945 "adjust_hpsa_scsi_table\n");
949 spin_lock_irqsave(&h->devlock, flags);
951 /* find any devices in h->dev[] that are not in
952 * sd[] and remove them from h->dev[], and for any
953 * devices which have changed, remove the old device
954 * info and add the new device info.
955 * If minor device attributes change, just update
956 * the existing device structure.
961 while (i < h->ndevices) {
963 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
964 if (device_change == DEVICE_NOT_FOUND) {
966 hpsa_scsi_remove_entry(h, hostno, i,
968 continue; /* remove ^^^, hence i not incremented */
969 } else if (device_change == DEVICE_CHANGED) {
971 hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
972 added, &nadded, removed, &nremoved);
973 /* Set it to NULL to prevent it from being freed
974 * at the bottom of hpsa_update_scsi_devices()
977 } else if (device_change == DEVICE_UPDATED) {
978 hpsa_scsi_update_entry(h, hostno, i, sd[entry]);
983 /* Now, make sure every device listed in sd[] is also
984 * listed in h->dev[], adding them if they aren't found
987 for (i = 0; i < nsds; i++) {
988 if (!sd[i]) /* if already added above. */
990 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
991 h->ndevices, &entry);
992 if (device_change == DEVICE_NOT_FOUND) {
994 if (hpsa_scsi_add_entry(h, hostno, sd[i],
995 added, &nadded) != 0)
997 sd[i] = NULL; /* prevent from being freed later. */
998 } else if (device_change == DEVICE_CHANGED) {
999 /* should never happen... */
1001 dev_warn(&h->pdev->dev,
1002 "device unexpectedly changed.\n");
1003 /* but if it does happen, we just ignore that device */
1006 spin_unlock_irqrestore(&h->devlock, flags);
1008 /* Don't notify scsi mid layer of any changes the first time through
1009 * (or if there are no changes) scsi_scan_host will do it later the
1010 * first time through.
1012 if (hostno == -1 || !changes)
1016 /* Notify scsi mid layer of any removed devices */
1017 for (i = 0; i < nremoved; i++) {
1018 struct scsi_device *sdev =
1019 scsi_device_lookup(sh, removed[i]->bus,
1020 removed[i]->target, removed[i]->lun);
1022 scsi_remove_device(sdev);
1023 scsi_device_put(sdev);
1025 /* We don't expect to get here.
1026 * future cmds to this device will get selection
1027 * timeout as if the device was gone.
1029 dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
1030 " for removal.", hostno, removed[i]->bus,
1031 removed[i]->target, removed[i]->lun);
1037 /* Notify scsi mid layer of any added devices */
1038 for (i = 0; i < nadded; i++) {
1039 if (scsi_add_device(sh, added[i]->bus,
1040 added[i]->target, added[i]->lun) == 0)
1042 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
1043 "device not added.\n", hostno, added[i]->bus,
1044 added[i]->target, added[i]->lun);
1045 /* now we have to remove it from h->dev,
1046 * since it didn't get added to scsi mid layer
1048 fixup_botched_add(h, added[i]);
1057 * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
1058 * Assume's h->devlock is held.
1060 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
1061 int bus, int target, int lun)
1064 struct hpsa_scsi_dev_t *sd;
1066 for (i = 0; i < h->ndevices; i++) {
1068 if (sd->bus == bus && sd->target == target && sd->lun == lun)
1074 /* link sdev->hostdata to our per-device structure. */
1075 static int hpsa_slave_alloc(struct scsi_device *sdev)
1077 struct hpsa_scsi_dev_t *sd;
1078 unsigned long flags;
1079 struct ctlr_info *h;
1081 h = sdev_to_hba(sdev);
1082 spin_lock_irqsave(&h->devlock, flags);
1083 sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
1084 sdev_id(sdev), sdev->lun);
1086 sdev->hostdata = sd;
1087 spin_unlock_irqrestore(&h->devlock, flags);
1091 static void hpsa_slave_destroy(struct scsi_device *sdev)
1093 /* nothing to do. */
1096 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
1100 if (!h->cmd_sg_list)
1102 for (i = 0; i < h->nr_cmds; i++) {
1103 kfree(h->cmd_sg_list[i]);
1104 h->cmd_sg_list[i] = NULL;
1106 kfree(h->cmd_sg_list);
1107 h->cmd_sg_list = NULL;
1110 static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
1114 if (h->chainsize <= 0)
1117 h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
1119 if (!h->cmd_sg_list)
1121 for (i = 0; i < h->nr_cmds; i++) {
1122 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
1123 h->chainsize, GFP_KERNEL);
1124 if (!h->cmd_sg_list[i])
1130 hpsa_free_sg_chain_blocks(h);
1134 static void hpsa_map_sg_chain_block(struct ctlr_info *h,
1135 struct CommandList *c)
1137 struct SGDescriptor *chain_sg, *chain_block;
1140 chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1141 chain_block = h->cmd_sg_list[c->cmdindex];
1142 chain_sg->Ext = HPSA_SG_CHAIN;
1143 chain_sg->Len = sizeof(*chain_sg) *
1144 (c->Header.SGTotal - h->max_cmd_sg_entries);
1145 temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
1147 chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
1148 chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
1151 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
1152 struct CommandList *c)
1154 struct SGDescriptor *chain_sg;
1155 union u64bit temp64;
1157 if (c->Header.SGTotal <= h->max_cmd_sg_entries)
1160 chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1161 temp64.val32.lower = chain_sg->Addr.lower;
1162 temp64.val32.upper = chain_sg->Addr.upper;
1163 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
1166 static void complete_scsi_command(struct CommandList *cp)
1168 struct scsi_cmnd *cmd;
1169 struct ctlr_info *h;
1170 struct ErrorInfo *ei;
1172 unsigned char sense_key;
1173 unsigned char asc; /* additional sense code */
1174 unsigned char ascq; /* additional sense code qualifier */
1175 unsigned long sense_data_size;
1178 cmd = (struct scsi_cmnd *) cp->scsi_cmd;
1181 scsi_dma_unmap(cmd); /* undo the DMA mappings */
1182 if (cp->Header.SGTotal > h->max_cmd_sg_entries)
1183 hpsa_unmap_sg_chain_block(h, cp);
1185 cmd->result = (DID_OK << 16); /* host byte */
1186 cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
1187 cmd->result |= ei->ScsiStatus;
1189 /* copy the sense data whether we need to or not. */
1190 if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
1191 sense_data_size = SCSI_SENSE_BUFFERSIZE;
1193 sense_data_size = sizeof(ei->SenseInfo);
1194 if (ei->SenseLen < sense_data_size)
1195 sense_data_size = ei->SenseLen;
1197 memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
1198 scsi_set_resid(cmd, ei->ResidualCnt);
1200 if (ei->CommandStatus == 0) {
1201 cmd->scsi_done(cmd);
1206 /* an error has occurred */
1207 switch (ei->CommandStatus) {
1209 case CMD_TARGET_STATUS:
1210 if (ei->ScsiStatus) {
1212 sense_key = 0xf & ei->SenseInfo[2];
1213 /* Get additional sense code */
1214 asc = ei->SenseInfo[12];
1215 /* Get addition sense code qualifier */
1216 ascq = ei->SenseInfo[13];
1219 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1220 if (check_for_unit_attention(h, cp)) {
1221 cmd->result = DID_SOFT_ERROR << 16;
1224 if (sense_key == ILLEGAL_REQUEST) {
1226 * SCSI REPORT_LUNS is commonly unsupported on
1227 * Smart Array. Suppress noisy complaint.
1229 if (cp->Request.CDB[0] == REPORT_LUNS)
1232 /* If ASC/ASCQ indicate Logical Unit
1233 * Not Supported condition,
1235 if ((asc == 0x25) && (ascq == 0x0)) {
1236 dev_warn(&h->pdev->dev, "cp %p "
1237 "has check condition\n", cp);
1242 if (sense_key == NOT_READY) {
1243 /* If Sense is Not Ready, Logical Unit
1244 * Not ready, Manual Intervention
1247 if ((asc == 0x04) && (ascq == 0x03)) {
1248 dev_warn(&h->pdev->dev, "cp %p "
1249 "has check condition: unit "
1250 "not ready, manual "
1251 "intervention required\n", cp);
1255 if (sense_key == ABORTED_COMMAND) {
1256 /* Aborted command is retryable */
1257 dev_warn(&h->pdev->dev, "cp %p "
1258 "has check condition: aborted command: "
1259 "ASC: 0x%x, ASCQ: 0x%x\n",
1261 cmd->result = DID_SOFT_ERROR << 16;
1264 /* Must be some other type of check condition */
1265 dev_dbg(&h->pdev->dev, "cp %p has check condition: "
1267 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1268 "Returning result: 0x%x, "
1269 "cmd=[%02x %02x %02x %02x %02x "
1270 "%02x %02x %02x %02x %02x %02x "
1271 "%02x %02x %02x %02x %02x]\n",
1272 cp, sense_key, asc, ascq,
1274 cmd->cmnd[0], cmd->cmnd[1],
1275 cmd->cmnd[2], cmd->cmnd[3],
1276 cmd->cmnd[4], cmd->cmnd[5],
1277 cmd->cmnd[6], cmd->cmnd[7],
1278 cmd->cmnd[8], cmd->cmnd[9],
1279 cmd->cmnd[10], cmd->cmnd[11],
1280 cmd->cmnd[12], cmd->cmnd[13],
1281 cmd->cmnd[14], cmd->cmnd[15]);
1286 /* Problem was not a check condition
1287 * Pass it up to the upper layers...
1289 if (ei->ScsiStatus) {
1290 dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1291 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1292 "Returning result: 0x%x\n",
1294 sense_key, asc, ascq,
1296 } else { /* scsi status is zero??? How??? */
1297 dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1298 "Returning no connection.\n", cp),
1300 /* Ordinarily, this case should never happen,
1301 * but there is a bug in some released firmware
1302 * revisions that allows it to happen if, for
1303 * example, a 4100 backplane loses power and
1304 * the tape drive is in it. We assume that
1305 * it's a fatal error of some kind because we
1306 * can't show that it wasn't. We will make it
1307 * look like selection timeout since that is
1308 * the most common reason for this to occur,
1309 * and it's severe enough.
1312 cmd->result = DID_NO_CONNECT << 16;
1316 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1318 case CMD_DATA_OVERRUN:
1319 dev_warn(&h->pdev->dev, "cp %p has"
1320 " completed with data overrun "
1324 /* print_bytes(cp, sizeof(*cp), 1, 0);
1326 /* We get CMD_INVALID if you address a non-existent device
1327 * instead of a selection timeout (no response). You will
1328 * see this if you yank out a drive, then try to access it.
1329 * This is kind of a shame because it means that any other
1330 * CMD_INVALID (e.g. driver bug) will get interpreted as a
1331 * missing target. */
1332 cmd->result = DID_NO_CONNECT << 16;
1335 case CMD_PROTOCOL_ERR:
1336 cmd->result = DID_ERROR << 16;
1337 dev_warn(&h->pdev->dev, "cp %p has "
1338 "protocol error\n", cp);
1340 case CMD_HARDWARE_ERR:
1341 cmd->result = DID_ERROR << 16;
1342 dev_warn(&h->pdev->dev, "cp %p had hardware error\n", cp);
1344 case CMD_CONNECTION_LOST:
1345 cmd->result = DID_ERROR << 16;
1346 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1349 cmd->result = DID_ABORT << 16;
1350 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1351 cp, ei->ScsiStatus);
1353 case CMD_ABORT_FAILED:
1354 cmd->result = DID_ERROR << 16;
1355 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1357 case CMD_UNSOLICITED_ABORT:
1358 cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
1359 dev_warn(&h->pdev->dev, "cp %p aborted due to an unsolicited "
1363 cmd->result = DID_TIME_OUT << 16;
1364 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1366 case CMD_UNABORTABLE:
1367 cmd->result = DID_ERROR << 16;
1368 dev_warn(&h->pdev->dev, "Command unabortable\n");
1371 cmd->result = DID_ERROR << 16;
1372 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1373 cp, ei->CommandStatus);
1375 cmd->scsi_done(cmd);
1379 static void hpsa_pci_unmap(struct pci_dev *pdev,
1380 struct CommandList *c, int sg_used, int data_direction)
1383 union u64bit addr64;
1385 for (i = 0; i < sg_used; i++) {
1386 addr64.val32.lower = c->SG[i].Addr.lower;
1387 addr64.val32.upper = c->SG[i].Addr.upper;
1388 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1393 static void hpsa_map_one(struct pci_dev *pdev,
1394 struct CommandList *cp,
1401 if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1402 cp->Header.SGList = 0;
1403 cp->Header.SGTotal = 0;
1407 addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1408 if (dma_mapping_error(&pdev->dev, addr64)) {
1409 cp->Header.SGList = 0;
1410 cp->Header.SGTotal = 0;
1413 cp->SG[0].Addr.lower =
1414 (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1415 cp->SG[0].Addr.upper =
1416 (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1417 cp->SG[0].Len = buflen;
1418 cp->Header.SGList = (u8) 1; /* no. SGs contig in this cmd */
1419 cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1422 static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1423 struct CommandList *c)
1425 DECLARE_COMPLETION_ONSTACK(wait);
1428 enqueue_cmd_and_start_io(h, c);
1429 wait_for_completion(&wait);
1432 static void hpsa_scsi_do_simple_cmd_core_if_no_lockup(struct ctlr_info *h,
1433 struct CommandList *c)
1435 unsigned long flags;
1437 /* If controller lockup detected, fake a hardware error. */
1438 spin_lock_irqsave(&h->lock, flags);
1439 if (unlikely(h->lockup_detected)) {
1440 spin_unlock_irqrestore(&h->lock, flags);
1441 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
1443 spin_unlock_irqrestore(&h->lock, flags);
1444 hpsa_scsi_do_simple_cmd_core(h, c);
1448 #define MAX_DRIVER_CMD_RETRIES 25
1449 static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1450 struct CommandList *c, int data_direction)
1452 int backoff_time = 10, retry_count = 0;
1455 memset(c->err_info, 0, sizeof(*c->err_info));
1456 hpsa_scsi_do_simple_cmd_core(h, c);
1458 if (retry_count > 3) {
1459 msleep(backoff_time);
1460 if (backoff_time < 1000)
1463 } while ((check_for_unit_attention(h, c) ||
1464 check_for_busy(h, c)) &&
1465 retry_count <= MAX_DRIVER_CMD_RETRIES);
1466 hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1469 static void hpsa_scsi_interpret_error(struct CommandList *cp)
1471 struct ErrorInfo *ei;
1472 struct device *d = &cp->h->pdev->dev;
1475 switch (ei->CommandStatus) {
1476 case CMD_TARGET_STATUS:
1477 dev_warn(d, "cmd %p has completed with errors\n", cp);
1478 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1480 if (ei->ScsiStatus == 0)
1481 dev_warn(d, "SCSI status is abnormally zero. "
1482 "(probably indicates selection timeout "
1483 "reported incorrectly due to a known "
1484 "firmware bug, circa July, 2001.)\n");
1486 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1487 dev_info(d, "UNDERRUN\n");
1489 case CMD_DATA_OVERRUN:
1490 dev_warn(d, "cp %p has completed with data overrun\n", cp);
1493 /* controller unfortunately reports SCSI passthru's
1494 * to non-existent targets as invalid commands.
1496 dev_warn(d, "cp %p is reported invalid (probably means "
1497 "target device no longer present)\n", cp);
1498 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1502 case CMD_PROTOCOL_ERR:
1503 dev_warn(d, "cp %p has protocol error \n", cp);
1505 case CMD_HARDWARE_ERR:
1506 /* cmd->result = DID_ERROR << 16; */
1507 dev_warn(d, "cp %p had hardware error\n", cp);
1509 case CMD_CONNECTION_LOST:
1510 dev_warn(d, "cp %p had connection lost\n", cp);
1513 dev_warn(d, "cp %p was aborted\n", cp);
1515 case CMD_ABORT_FAILED:
1516 dev_warn(d, "cp %p reports abort failed\n", cp);
1518 case CMD_UNSOLICITED_ABORT:
1519 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1522 dev_warn(d, "cp %p timed out\n", cp);
1524 case CMD_UNABORTABLE:
1525 dev_warn(d, "Command unabortable\n");
1528 dev_warn(d, "cp %p returned unknown status %x\n", cp,
1533 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1534 unsigned char page, unsigned char *buf,
1535 unsigned char bufsize)
1538 struct CommandList *c;
1539 struct ErrorInfo *ei;
1541 c = cmd_special_alloc(h);
1543 if (c == NULL) { /* trouble... */
1544 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1548 fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
1549 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1551 if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1552 hpsa_scsi_interpret_error(c);
1555 cmd_special_free(h, c);
1559 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1562 struct CommandList *c;
1563 struct ErrorInfo *ei;
1565 c = cmd_special_alloc(h);
1567 if (c == NULL) { /* trouble... */
1568 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1572 fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
1573 hpsa_scsi_do_simple_cmd_core(h, c);
1574 /* no unmap needed here because no data xfer. */
1577 if (ei->CommandStatus != 0) {
1578 hpsa_scsi_interpret_error(c);
1581 cmd_special_free(h, c);
1585 static void hpsa_get_raid_level(struct ctlr_info *h,
1586 unsigned char *scsi3addr, unsigned char *raid_level)
1591 *raid_level = RAID_UNKNOWN;
1592 buf = kzalloc(64, GFP_KERNEL);
1595 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1597 *raid_level = buf[8];
1598 if (*raid_level > RAID_UNKNOWN)
1599 *raid_level = RAID_UNKNOWN;
1604 /* Get the device id from inquiry page 0x83 */
1605 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1606 unsigned char *device_id, int buflen)
1613 buf = kzalloc(64, GFP_KERNEL);
1616 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1618 memcpy(device_id, &buf[8], buflen);
1623 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1624 struct ReportLUNdata *buf, int bufsize,
1625 int extended_response)
1628 struct CommandList *c;
1629 unsigned char scsi3addr[8];
1630 struct ErrorInfo *ei;
1632 c = cmd_special_alloc(h);
1633 if (c == NULL) { /* trouble... */
1634 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1637 /* address the controller */
1638 memset(scsi3addr, 0, sizeof(scsi3addr));
1639 fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1640 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1641 if (extended_response)
1642 c->Request.CDB[1] = extended_response;
1643 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1645 if (ei->CommandStatus != 0 &&
1646 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1647 hpsa_scsi_interpret_error(c);
1650 cmd_special_free(h, c);
1654 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1655 struct ReportLUNdata *buf,
1656 int bufsize, int extended_response)
1658 return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1661 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1662 struct ReportLUNdata *buf, int bufsize)
1664 return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1667 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1668 int bus, int target, int lun)
1671 device->target = target;
1675 static int hpsa_update_device_info(struct ctlr_info *h,
1676 unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
1677 unsigned char *is_OBDR_device)
1680 #define OBDR_SIG_OFFSET 43
1681 #define OBDR_TAPE_SIG "$DR-10"
1682 #define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
1683 #define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
1685 unsigned char *inq_buff;
1686 unsigned char *obdr_sig;
1688 inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1692 /* Do an inquiry to the device to see what it is. */
1693 if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1694 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1695 /* Inquiry failed (msg printed already) */
1696 dev_err(&h->pdev->dev,
1697 "hpsa_update_device_info: inquiry failed\n");
1701 this_device->devtype = (inq_buff[0] & 0x1f);
1702 memcpy(this_device->scsi3addr, scsi3addr, 8);
1703 memcpy(this_device->vendor, &inq_buff[8],
1704 sizeof(this_device->vendor));
1705 memcpy(this_device->model, &inq_buff[16],
1706 sizeof(this_device->model));
1707 memset(this_device->device_id, 0,
1708 sizeof(this_device->device_id));
1709 hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1710 sizeof(this_device->device_id));
1712 if (this_device->devtype == TYPE_DISK &&
1713 is_logical_dev_addr_mode(scsi3addr))
1714 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1716 this_device->raid_level = RAID_UNKNOWN;
1718 if (is_OBDR_device) {
1719 /* See if this is a One-Button-Disaster-Recovery device
1720 * by looking for "$DR-10" at offset 43 in inquiry data.
1722 obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
1723 *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
1724 strncmp(obdr_sig, OBDR_TAPE_SIG,
1725 OBDR_SIG_LEN) == 0);
1736 static unsigned char *ext_target_model[] = {
1745 static int is_ext_target(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1749 for (i = 0; ext_target_model[i]; i++)
1750 if (strncmp(device->model, ext_target_model[i],
1751 strlen(ext_target_model[i])) == 0)
1756 /* Helper function to assign bus, target, lun mapping of devices.
1757 * Puts non-external target logical volumes on bus 0, external target logical
1758 * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1759 * Logical drive target and lun are assigned at this time, but
1760 * physical device lun and target assignment are deferred (assigned
1761 * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1763 static void figure_bus_target_lun(struct ctlr_info *h,
1764 u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
1766 u32 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1768 if (!is_logical_dev_addr_mode(lunaddrbytes)) {
1769 /* physical device, target and lun filled in later */
1770 if (is_hba_lunid(lunaddrbytes))
1771 hpsa_set_bus_target_lun(device, 3, 0, lunid & 0x3fff);
1773 /* defer target, lun assignment for physical devices */
1774 hpsa_set_bus_target_lun(device, 2, -1, -1);
1777 /* It's a logical device */
1778 if (is_ext_target(h, device)) {
1779 /* external target way, put logicals on bus 1
1780 * and match target/lun numbers box
1781 * reports, other smart array, bus 0, target 0, match lunid
1783 hpsa_set_bus_target_lun(device,
1784 1, (lunid >> 16) & 0x3fff, lunid & 0x00ff);
1787 hpsa_set_bus_target_lun(device, 0, 0, lunid & 0x3fff);
1791 * If there is no lun 0 on a target, linux won't find any devices.
1792 * For the external targets (arrays), we have to manually detect the enclosure
1793 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1794 * it for some reason. *tmpdevice is the target we're adding,
1795 * this_device is a pointer into the current element of currentsd[]
1796 * that we're building up in update_scsi_devices(), below.
1797 * lunzerobits is a bitmap that tracks which targets already have a
1799 * Returns 1 if an enclosure was added, 0 if not.
1801 static int add_ext_target_dev(struct ctlr_info *h,
1802 struct hpsa_scsi_dev_t *tmpdevice,
1803 struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1804 unsigned long lunzerobits[], int *n_ext_target_devs)
1806 unsigned char scsi3addr[8];
1808 if (test_bit(tmpdevice->target, lunzerobits))
1809 return 0; /* There is already a lun 0 on this target. */
1811 if (!is_logical_dev_addr_mode(lunaddrbytes))
1812 return 0; /* It's the logical targets that may lack lun 0. */
1814 if (!is_ext_target(h, tmpdevice))
1815 return 0; /* Only external target devices have this problem. */
1817 if (tmpdevice->lun == 0) /* if lun is 0, then we have a lun 0. */
1820 memset(scsi3addr, 0, 8);
1821 scsi3addr[3] = tmpdevice->target;
1822 if (is_hba_lunid(scsi3addr))
1823 return 0; /* Don't add the RAID controller here. */
1825 if (is_scsi_rev_5(h))
1826 return 0; /* p1210m doesn't need to do this. */
1828 if (*n_ext_target_devs >= MAX_EXT_TARGETS) {
1829 dev_warn(&h->pdev->dev, "Maximum number of external "
1830 "target devices exceeded. Check your hardware "
1835 if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
1837 (*n_ext_target_devs)++;
1838 hpsa_set_bus_target_lun(this_device,
1839 tmpdevice->bus, tmpdevice->target, 0);
1840 set_bit(tmpdevice->target, lunzerobits);
1845 * Do CISS_REPORT_PHYS and CISS_REPORT_LOG. Data is returned in physdev,
1846 * logdev. The number of luns in physdev and logdev are returned in
1847 * *nphysicals and *nlogicals, respectively.
1848 * Returns 0 on success, -1 otherwise.
1850 static int hpsa_gather_lun_info(struct ctlr_info *h,
1852 struct ReportLUNdata *physdev, u32 *nphysicals,
1853 struct ReportLUNdata *logdev, u32 *nlogicals)
1855 if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1856 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1859 *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1860 if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1861 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1862 " %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1863 *nphysicals - HPSA_MAX_PHYS_LUN);
1864 *nphysicals = HPSA_MAX_PHYS_LUN;
1866 if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1867 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1870 *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1871 /* Reject Logicals in excess of our max capability. */
1872 if (*nlogicals > HPSA_MAX_LUN) {
1873 dev_warn(&h->pdev->dev,
1874 "maximum logical LUNs (%d) exceeded. "
1875 "%d LUNs ignored.\n", HPSA_MAX_LUN,
1876 *nlogicals - HPSA_MAX_LUN);
1877 *nlogicals = HPSA_MAX_LUN;
1879 if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1880 dev_warn(&h->pdev->dev,
1881 "maximum logical + physical LUNs (%d) exceeded. "
1882 "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1883 *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1884 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1889 u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1890 int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1891 struct ReportLUNdata *logdev_list)
1893 /* Helper function, figure out where the LUN ID info is coming from
1894 * given index i, lists of physical and logical devices, where in
1895 * the list the raid controller is supposed to appear (first or last)
1898 int logicals_start = nphysicals + (raid_ctlr_position == 0);
1899 int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1901 if (i == raid_ctlr_position)
1902 return RAID_CTLR_LUNID;
1904 if (i < logicals_start)
1905 return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1907 if (i < last_device)
1908 return &logdev_list->LUN[i - nphysicals -
1909 (raid_ctlr_position == 0)][0];
1914 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1916 /* the idea here is we could get notified
1917 * that some devices have changed, so we do a report
1918 * physical luns and report logical luns cmd, and adjust
1919 * our list of devices accordingly.
1921 * The scsi3addr's of devices won't change so long as the
1922 * adapter is not reset. That means we can rescan and
1923 * tell which devices we already know about, vs. new
1924 * devices, vs. disappearing devices.
1926 struct ReportLUNdata *physdev_list = NULL;
1927 struct ReportLUNdata *logdev_list = NULL;
1930 u32 ndev_allocated = 0;
1931 struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1933 int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1934 int i, n_ext_target_devs, ndevs_to_allocate;
1935 int raid_ctlr_position;
1936 DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
1938 currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
1939 physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1940 logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1941 tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1943 if (!currentsd || !physdev_list || !logdev_list || !tmpdevice) {
1944 dev_err(&h->pdev->dev, "out of memory\n");
1947 memset(lunzerobits, 0, sizeof(lunzerobits));
1949 if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1950 logdev_list, &nlogicals))
1953 /* We might see up to the maximum number of logical and physical disks
1954 * plus external target devices, and a device for the local RAID
1957 ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
1959 /* Allocate the per device structures */
1960 for (i = 0; i < ndevs_to_allocate; i++) {
1961 if (i >= HPSA_MAX_DEVICES) {
1962 dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded."
1963 " %d devices ignored.\n", HPSA_MAX_DEVICES,
1964 ndevs_to_allocate - HPSA_MAX_DEVICES);
1968 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1969 if (!currentsd[i]) {
1970 dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1971 __FILE__, __LINE__);
1977 if (unlikely(is_scsi_rev_5(h)))
1978 raid_ctlr_position = 0;
1980 raid_ctlr_position = nphysicals + nlogicals;
1982 /* adjust our table of devices */
1983 n_ext_target_devs = 0;
1984 for (i = 0; i < nphysicals + nlogicals + 1; i++) {
1985 u8 *lunaddrbytes, is_OBDR = 0;
1987 /* Figure out where the LUN ID info is coming from */
1988 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
1989 i, nphysicals, nlogicals, physdev_list, logdev_list);
1990 /* skip masked physical devices. */
1991 if (lunaddrbytes[3] & 0xC0 &&
1992 i < nphysicals + (raid_ctlr_position == 0))
1995 /* Get device type, vendor, model, device id */
1996 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
1998 continue; /* skip it if we can't talk to it. */
1999 figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
2000 this_device = currentsd[ncurrent];
2003 * For external target devices, we have to insert a LUN 0 which
2004 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
2005 * is nonetheless an enclosure device there. We have to
2006 * present that otherwise linux won't find anything if
2007 * there is no lun 0.
2009 if (add_ext_target_dev(h, tmpdevice, this_device,
2010 lunaddrbytes, lunzerobits,
2011 &n_ext_target_devs)) {
2013 this_device = currentsd[ncurrent];
2016 *this_device = *tmpdevice;
2018 switch (this_device->devtype) {
2020 /* We don't *really* support actual CD-ROM devices,
2021 * just "One Button Disaster Recovery" tape drive
2022 * which temporarily pretends to be a CD-ROM drive.
2023 * So we check that the device is really an OBDR tape
2024 * device by checking for "$DR-10" in bytes 43-48 of
2036 case TYPE_MEDIUM_CHANGER:
2040 /* Only present the Smartarray HBA as a RAID controller.
2041 * If it's a RAID controller other than the HBA itself
2042 * (an external RAID controller, MSA500 or similar)
2045 if (!is_hba_lunid(lunaddrbytes))
2052 if (ncurrent >= HPSA_MAX_DEVICES)
2055 adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
2058 for (i = 0; i < ndev_allocated; i++)
2059 kfree(currentsd[i]);
2061 kfree(physdev_list);
2065 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
2066 * dma mapping and fills in the scatter gather entries of the
2069 static int hpsa_scatter_gather(struct ctlr_info *h,
2070 struct CommandList *cp,
2071 struct scsi_cmnd *cmd)
2074 struct scatterlist *sg;
2076 int use_sg, i, sg_index, chained;
2077 struct SGDescriptor *curr_sg;
2079 BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
2081 use_sg = scsi_dma_map(cmd);
2086 goto sglist_finished;
2091 scsi_for_each_sg(cmd, sg, use_sg, i) {
2092 if (i == h->max_cmd_sg_entries - 1 &&
2093 use_sg > h->max_cmd_sg_entries) {
2095 curr_sg = h->cmd_sg_list[cp->cmdindex];
2098 addr64 = (u64) sg_dma_address(sg);
2099 len = sg_dma_len(sg);
2100 curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
2101 curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
2103 curr_sg->Ext = 0; /* we are not chaining */
2107 if (use_sg + chained > h->maxSG)
2108 h->maxSG = use_sg + chained;
2111 cp->Header.SGList = h->max_cmd_sg_entries;
2112 cp->Header.SGTotal = (u16) (use_sg + 1);
2113 hpsa_map_sg_chain_block(h, cp);
2119 cp->Header.SGList = (u8) use_sg; /* no. SGs contig in this cmd */
2120 cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
2125 static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd,
2126 void (*done)(struct scsi_cmnd *))
2128 struct ctlr_info *h;
2129 struct hpsa_scsi_dev_t *dev;
2130 unsigned char scsi3addr[8];
2131 struct CommandList *c;
2132 unsigned long flags;
2134 /* Get the ptr to our adapter structure out of cmd->host. */
2135 h = sdev_to_hba(cmd->device);
2136 dev = cmd->device->hostdata;
2138 cmd->result = DID_NO_CONNECT << 16;
2142 memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
2144 spin_lock_irqsave(&h->lock, flags);
2145 if (unlikely(h->lockup_detected)) {
2146 spin_unlock_irqrestore(&h->lock, flags);
2147 cmd->result = DID_ERROR << 16;
2151 spin_unlock_irqrestore(&h->lock, flags);
2153 if (c == NULL) { /* trouble... */
2154 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2155 return SCSI_MLQUEUE_HOST_BUSY;
2158 /* Fill in the command list header */
2160 cmd->scsi_done = done; /* save this for use by completion code */
2162 /* save c in case we have to abort it */
2163 cmd->host_scribble = (unsigned char *) c;
2165 c->cmd_type = CMD_SCSI;
2167 c->Header.ReplyQueue = 0; /* unused in simple mode */
2168 memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
2169 c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
2170 c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
2172 /* Fill in the request block... */
2174 c->Request.Timeout = 0;
2175 memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
2176 BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
2177 c->Request.CDBLen = cmd->cmd_len;
2178 memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
2179 c->Request.Type.Type = TYPE_CMD;
2180 c->Request.Type.Attribute = ATTR_SIMPLE;
2181 switch (cmd->sc_data_direction) {
2183 c->Request.Type.Direction = XFER_WRITE;
2185 case DMA_FROM_DEVICE:
2186 c->Request.Type.Direction = XFER_READ;
2189 c->Request.Type.Direction = XFER_NONE;
2191 case DMA_BIDIRECTIONAL:
2192 /* This can happen if a buggy application does a scsi passthru
2193 * and sets both inlen and outlen to non-zero. ( see
2194 * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
2197 c->Request.Type.Direction = XFER_RSVD;
2198 /* This is technically wrong, and hpsa controllers should
2199 * reject it with CMD_INVALID, which is the most correct
2200 * response, but non-fibre backends appear to let it
2201 * slide by, and give the same results as if this field
2202 * were set correctly. Either way is acceptable for
2203 * our purposes here.
2209 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
2210 cmd->sc_data_direction);
2215 if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
2217 return SCSI_MLQUEUE_HOST_BUSY;
2219 enqueue_cmd_and_start_io(h, c);
2220 /* the cmd'll come back via intr handler in complete_scsi_command() */
2224 static DEF_SCSI_QCMD(hpsa_scsi_queue_command)
2226 static void hpsa_scan_start(struct Scsi_Host *sh)
2228 struct ctlr_info *h = shost_to_hba(sh);
2229 unsigned long flags;
2231 /* wait until any scan already in progress is finished. */
2233 spin_lock_irqsave(&h->scan_lock, flags);
2234 if (h->scan_finished)
2236 spin_unlock_irqrestore(&h->scan_lock, flags);
2237 wait_event(h->scan_wait_queue, h->scan_finished);
2238 /* Note: We don't need to worry about a race between this
2239 * thread and driver unload because the midlayer will
2240 * have incremented the reference count, so unload won't
2241 * happen if we're in here.
2244 h->scan_finished = 0; /* mark scan as in progress */
2245 spin_unlock_irqrestore(&h->scan_lock, flags);
2247 hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2249 spin_lock_irqsave(&h->scan_lock, flags);
2250 h->scan_finished = 1; /* mark scan as finished. */
2251 wake_up_all(&h->scan_wait_queue);
2252 spin_unlock_irqrestore(&h->scan_lock, flags);
2255 static int hpsa_scan_finished(struct Scsi_Host *sh,
2256 unsigned long elapsed_time)
2258 struct ctlr_info *h = shost_to_hba(sh);
2259 unsigned long flags;
2262 spin_lock_irqsave(&h->scan_lock, flags);
2263 finished = h->scan_finished;
2264 spin_unlock_irqrestore(&h->scan_lock, flags);
2268 static int hpsa_change_queue_depth(struct scsi_device *sdev,
2269 int qdepth, int reason)
2271 struct ctlr_info *h = sdev_to_hba(sdev);
2273 if (reason != SCSI_QDEPTH_DEFAULT)
2279 if (qdepth > h->nr_cmds)
2280 qdepth = h->nr_cmds;
2281 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2282 return sdev->queue_depth;
2285 static void hpsa_unregister_scsi(struct ctlr_info *h)
2287 /* we are being forcibly unloaded, and may not refuse. */
2288 scsi_remove_host(h->scsi_host);
2289 scsi_host_put(h->scsi_host);
2290 h->scsi_host = NULL;
2293 static int hpsa_register_scsi(struct ctlr_info *h)
2295 struct Scsi_Host *sh;
2298 sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
2305 sh->max_channel = 3;
2306 sh->max_cmd_len = MAX_COMMAND_SIZE;
2307 sh->max_lun = HPSA_MAX_LUN;
2308 sh->max_id = HPSA_MAX_LUN;
2309 sh->can_queue = h->nr_cmds;
2310 sh->cmd_per_lun = h->nr_cmds;
2311 sh->sg_tablesize = h->maxsgentries;
2313 sh->hostdata[0] = (unsigned long) h;
2314 sh->irq = h->intr[h->intr_mode];
2315 sh->unique_id = sh->irq;
2316 error = scsi_add_host(sh, &h->pdev->dev);
2323 dev_err(&h->pdev->dev, "%s: scsi_add_host"
2324 " failed for controller %d\n", __func__, h->ctlr);
2328 dev_err(&h->pdev->dev, "%s: scsi_host_alloc"
2329 " failed for controller %d\n", __func__, h->ctlr);
2333 static int wait_for_device_to_become_ready(struct ctlr_info *h,
2334 unsigned char lunaddr[])
2338 int waittime = 1; /* seconds */
2339 struct CommandList *c;
2341 c = cmd_special_alloc(h);
2343 dev_warn(&h->pdev->dev, "out of memory in "
2344 "wait_for_device_to_become_ready.\n");
2348 /* Send test unit ready until device ready, or give up. */
2349 while (count < HPSA_TUR_RETRY_LIMIT) {
2351 /* Wait for a bit. do this first, because if we send
2352 * the TUR right away, the reset will just abort it.
2354 msleep(1000 * waittime);
2357 /* Increase wait time with each try, up to a point. */
2358 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2359 waittime = waittime * 2;
2361 /* Send the Test Unit Ready */
2362 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
2363 hpsa_scsi_do_simple_cmd_core(h, c);
2364 /* no unmap needed here because no data xfer. */
2366 if (c->err_info->CommandStatus == CMD_SUCCESS)
2369 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2370 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2371 (c->err_info->SenseInfo[2] == NO_SENSE ||
2372 c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2375 dev_warn(&h->pdev->dev, "waiting %d secs "
2376 "for device to become ready.\n", waittime);
2377 rc = 1; /* device not ready. */
2381 dev_warn(&h->pdev->dev, "giving up on device.\n");
2383 dev_warn(&h->pdev->dev, "device is ready.\n");
2385 cmd_special_free(h, c);
2389 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
2390 * complaining. Doing a host- or bus-reset can't do anything good here.
2392 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2395 struct ctlr_info *h;
2396 struct hpsa_scsi_dev_t *dev;
2398 /* find the controller to which the command to be aborted was sent */
2399 h = sdev_to_hba(scsicmd->device);
2400 if (h == NULL) /* paranoia */
2402 dev = scsicmd->device->hostdata;
2404 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2405 "device lookup failed.\n");
2408 dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2409 h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2410 /* send a reset to the SCSI LUN which the command was sent to */
2411 rc = hpsa_send_reset(h, dev->scsi3addr);
2412 if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2415 dev_warn(&h->pdev->dev, "resetting device failed.\n");
2419 static void swizzle_abort_tag(u8 *tag)
2423 memcpy(original_tag, tag, 8);
2424 tag[0] = original_tag[3];
2425 tag[1] = original_tag[2];
2426 tag[2] = original_tag[1];
2427 tag[3] = original_tag[0];
2428 tag[4] = original_tag[7];
2429 tag[5] = original_tag[6];
2430 tag[6] = original_tag[5];
2431 tag[7] = original_tag[4];
2434 static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
2435 struct CommandList *abort, int swizzle)
2438 struct CommandList *c;
2439 struct ErrorInfo *ei;
2441 c = cmd_special_alloc(h);
2442 if (c == NULL) { /* trouble... */
2443 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
2447 fill_cmd(c, HPSA_ABORT_MSG, h, abort, 0, 0, scsi3addr, TYPE_MSG);
2449 swizzle_abort_tag(&c->Request.CDB[4]);
2450 hpsa_scsi_do_simple_cmd_core(h, c);
2451 dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd_core completed.\n",
2452 __func__, abort->Header.Tag.upper, abort->Header.Tag.lower);
2453 /* no unmap needed here because no data xfer. */
2456 switch (ei->CommandStatus) {
2459 case CMD_UNABORTABLE: /* Very common, don't make noise. */
2463 dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: interpreting error.\n",
2464 __func__, abort->Header.Tag.upper,
2465 abort->Header.Tag.lower);
2466 hpsa_scsi_interpret_error(c);
2470 cmd_special_free(h, c);
2471 dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n", __func__,
2472 abort->Header.Tag.upper, abort->Header.Tag.lower);
2477 * hpsa_find_cmd_in_queue
2479 * Used to determine whether a command (find) is still present
2480 * in queue_head. Optionally excludes the last element of queue_head.
2482 * This is used to avoid unnecessary aborts. Commands in h->reqQ have
2483 * not yet been submitted, and so can be aborted by the driver without
2484 * sending an abort to the hardware.
2486 * Returns pointer to command if found in queue, NULL otherwise.
2488 static struct CommandList *hpsa_find_cmd_in_queue(struct ctlr_info *h,
2489 struct scsi_cmnd *find, struct list_head *queue_head)
2491 unsigned long flags;
2492 struct CommandList *c = NULL; /* ptr into cmpQ */
2496 spin_lock_irqsave(&h->lock, flags);
2497 list_for_each_entry(c, queue_head, list) {
2498 if (c->scsi_cmd == NULL) /* e.g.: passthru ioctl */
2500 if (c->scsi_cmd == find) {
2501 spin_unlock_irqrestore(&h->lock, flags);
2505 spin_unlock_irqrestore(&h->lock, flags);
2509 static struct CommandList *hpsa_find_cmd_in_queue_by_tag(struct ctlr_info *h,
2510 u8 *tag, struct list_head *queue_head)
2512 unsigned long flags;
2513 struct CommandList *c;
2515 spin_lock_irqsave(&h->lock, flags);
2516 list_for_each_entry(c, queue_head, list) {
2517 if (memcmp(&c->Header.Tag, tag, 8) != 0)
2519 spin_unlock_irqrestore(&h->lock, flags);
2522 spin_unlock_irqrestore(&h->lock, flags);
2526 /* Some Smart Arrays need the abort tag swizzled, and some don't. It's hard to
2527 * tell which kind we're dealing with, so we send the abort both ways. There
2528 * shouldn't be any collisions between swizzled and unswizzled tags due to the
2529 * way we construct our tags but we check anyway in case the assumptions which
2530 * make this true someday become false.
2532 static int hpsa_send_abort_both_ways(struct ctlr_info *h,
2533 unsigned char *scsi3addr, struct CommandList *abort)
2536 struct CommandList *c;
2537 int rc = 0, rc2 = 0;
2539 /* we do not expect to find the swizzled tag in our queue, but
2540 * check anyway just to be sure the assumptions which make this
2541 * the case haven't become wrong.
2543 memcpy(swizzled_tag, &abort->Request.CDB[4], 8);
2544 swizzle_abort_tag(swizzled_tag);
2545 c = hpsa_find_cmd_in_queue_by_tag(h, swizzled_tag, &h->cmpQ);
2547 dev_warn(&h->pdev->dev, "Unexpectedly found byte-swapped tag in completion queue.\n");
2548 return hpsa_send_abort(h, scsi3addr, abort, 0);
2550 rc = hpsa_send_abort(h, scsi3addr, abort, 0);
2552 /* if the command is still in our queue, we can't conclude that it was
2553 * aborted (it might have just completed normally) but in any case
2554 * we don't need to try to abort it another way.
2556 c = hpsa_find_cmd_in_queue(h, abort->scsi_cmd, &h->cmpQ);
2558 rc2 = hpsa_send_abort(h, scsi3addr, abort, 1);
2562 /* Send an abort for the specified command.
2563 * If the device and controller support it,
2564 * send a task abort request.
2566 static int hpsa_eh_abort_handler(struct scsi_cmnd *sc)
2570 struct ctlr_info *h;
2571 struct hpsa_scsi_dev_t *dev;
2572 struct CommandList *abort; /* pointer to command to be aborted */
2573 struct CommandList *found;
2574 struct scsi_cmnd *as; /* ptr to scsi cmd inside aborted command. */
2575 char msg[256]; /* For debug messaging. */
2578 /* Find the controller of the command to be aborted */
2579 h = sdev_to_hba(sc->device);
2581 "ABORT REQUEST FAILED, Controller lookup failed.\n"))
2584 /* Check that controller supports some kind of task abort */
2585 if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags) &&
2586 !(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
2589 memset(msg, 0, sizeof(msg));
2590 ml += sprintf(msg+ml, "ABORT REQUEST on C%d:B%d:T%d:L%d ",
2591 h->scsi_host->host_no, sc->device->channel,
2592 sc->device->id, sc->device->lun);
2594 /* Find the device of the command to be aborted */
2595 dev = sc->device->hostdata;
2597 dev_err(&h->pdev->dev, "%s FAILED, Device lookup failed.\n",
2602 /* Get SCSI command to be aborted */
2603 abort = (struct CommandList *) sc->host_scribble;
2604 if (abort == NULL) {
2605 dev_err(&h->pdev->dev, "%s FAILED, Command to abort is NULL.\n",
2610 ml += sprintf(msg+ml, "Tag:0x%08x:%08x ",
2611 abort->Header.Tag.upper, abort->Header.Tag.lower);
2612 as = (struct scsi_cmnd *) abort->scsi_cmd;
2614 ml += sprintf(msg+ml, "Command:0x%x SN:0x%lx ",
2615 as->cmnd[0], as->serial_number);
2616 dev_dbg(&h->pdev->dev, "%s\n", msg);
2617 dev_warn(&h->pdev->dev, "Abort request on C%d:B%d:T%d:L%d\n",
2618 h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2620 /* Search reqQ to See if command is queued but not submitted,
2621 * if so, complete the command with aborted status and remove
2624 found = hpsa_find_cmd_in_queue(h, sc, &h->reqQ);
2626 found->err_info->CommandStatus = CMD_ABORTED;
2628 dev_info(&h->pdev->dev, "%s Request SUCCEEDED (driver queue).\n",
2633 /* not in reqQ, if also not in cmpQ, must have already completed */
2634 found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
2636 dev_dbg(&h->pdev->dev, "%s Request SUCCEEDED (not known to driver).\n",
2642 * Command is in flight, or possibly already completed
2643 * by the firmware (but not to the scsi mid layer) but we can't
2644 * distinguish which. Send the abort down.
2646 rc = hpsa_send_abort_both_ways(h, dev->scsi3addr, abort);
2648 dev_dbg(&h->pdev->dev, "%s Request FAILED.\n", msg);
2649 dev_warn(&h->pdev->dev, "FAILED abort on device C%d:B%d:T%d:L%d\n",
2650 h->scsi_host->host_no,
2651 dev->bus, dev->target, dev->lun);
2654 dev_info(&h->pdev->dev, "%s REQUEST SUCCEEDED.\n", msg);
2656 /* If the abort(s) above completed and actually aborted the
2657 * command, then the command to be aborted should already be
2658 * completed. If not, wait around a bit more to see if they
2659 * manage to complete normally.
2661 #define ABORT_COMPLETE_WAIT_SECS 30
2662 for (i = 0; i < ABORT_COMPLETE_WAIT_SECS * 10; i++) {
2663 found = hpsa_find_cmd_in_queue(h, sc, &h->cmpQ);
2668 dev_warn(&h->pdev->dev, "%s FAILED. Aborted command has not completed after %d seconds.\n",
2669 msg, ABORT_COMPLETE_WAIT_SECS);
2675 * For operations that cannot sleep, a command block is allocated at init,
2676 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2677 * which ones are free or in use. Lock must be held when calling this.
2678 * cmd_free() is the complement.
2680 static struct CommandList *cmd_alloc(struct ctlr_info *h)
2682 struct CommandList *c;
2684 union u64bit temp64;
2685 dma_addr_t cmd_dma_handle, err_dma_handle;
2686 unsigned long flags;
2688 spin_lock_irqsave(&h->lock, flags);
2690 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2691 if (i == h->nr_cmds) {
2692 spin_unlock_irqrestore(&h->lock, flags);
2695 } while (test_and_set_bit
2696 (i & (BITS_PER_LONG - 1),
2697 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2699 spin_unlock_irqrestore(&h->lock, flags);
2701 c = h->cmd_pool + i;
2702 memset(c, 0, sizeof(*c));
2703 cmd_dma_handle = h->cmd_pool_dhandle
2705 c->err_info = h->errinfo_pool + i;
2706 memset(c->err_info, 0, sizeof(*c->err_info));
2707 err_dma_handle = h->errinfo_pool_dhandle
2708 + i * sizeof(*c->err_info);
2712 INIT_LIST_HEAD(&c->list);
2713 c->busaddr = (u32) cmd_dma_handle;
2714 temp64.val = (u64) err_dma_handle;
2715 c->ErrDesc.Addr.lower = temp64.val32.lower;
2716 c->ErrDesc.Addr.upper = temp64.val32.upper;
2717 c->ErrDesc.Len = sizeof(*c->err_info);
2723 /* For operations that can wait for kmalloc to possibly sleep,
2724 * this routine can be called. Lock need not be held to call
2725 * cmd_special_alloc. cmd_special_free() is the complement.
2727 static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2729 struct CommandList *c;
2730 union u64bit temp64;
2731 dma_addr_t cmd_dma_handle, err_dma_handle;
2733 c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2736 memset(c, 0, sizeof(*c));
2740 c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2743 if (c->err_info == NULL) {
2744 pci_free_consistent(h->pdev,
2745 sizeof(*c), c, cmd_dma_handle);
2748 memset(c->err_info, 0, sizeof(*c->err_info));
2750 INIT_LIST_HEAD(&c->list);
2751 c->busaddr = (u32) cmd_dma_handle;
2752 temp64.val = (u64) err_dma_handle;
2753 c->ErrDesc.Addr.lower = temp64.val32.lower;
2754 c->ErrDesc.Addr.upper = temp64.val32.upper;
2755 c->ErrDesc.Len = sizeof(*c->err_info);
2761 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2764 unsigned long flags;
2766 i = c - h->cmd_pool;
2767 spin_lock_irqsave(&h->lock, flags);
2768 clear_bit(i & (BITS_PER_LONG - 1),
2769 h->cmd_pool_bits + (i / BITS_PER_LONG));
2771 spin_unlock_irqrestore(&h->lock, flags);
2774 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2776 union u64bit temp64;
2778 temp64.val32.lower = c->ErrDesc.Addr.lower;
2779 temp64.val32.upper = c->ErrDesc.Addr.upper;
2780 pci_free_consistent(h->pdev, sizeof(*c->err_info),
2781 c->err_info, (dma_addr_t) temp64.val);
2782 pci_free_consistent(h->pdev, sizeof(*c),
2783 c, (dma_addr_t) (c->busaddr & DIRECT_LOOKUP_MASK));
2786 #ifdef CONFIG_COMPAT
2788 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2790 IOCTL32_Command_struct __user *arg32 =
2791 (IOCTL32_Command_struct __user *) arg;
2792 IOCTL_Command_struct arg64;
2793 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2797 memset(&arg64, 0, sizeof(arg64));
2799 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2800 sizeof(arg64.LUN_info));
2801 err |= copy_from_user(&arg64.Request, &arg32->Request,
2802 sizeof(arg64.Request));
2803 err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2804 sizeof(arg64.error_info));
2805 err |= get_user(arg64.buf_size, &arg32->buf_size);
2806 err |= get_user(cp, &arg32->buf);
2807 arg64.buf = compat_ptr(cp);
2808 err |= copy_to_user(p, &arg64, sizeof(arg64));
2813 err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2816 err |= copy_in_user(&arg32->error_info, &p->error_info,
2817 sizeof(arg32->error_info));
2823 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2826 BIG_IOCTL32_Command_struct __user *arg32 =
2827 (BIG_IOCTL32_Command_struct __user *) arg;
2828 BIG_IOCTL_Command_struct arg64;
2829 BIG_IOCTL_Command_struct __user *p =
2830 compat_alloc_user_space(sizeof(arg64));
2834 memset(&arg64, 0, sizeof(arg64));
2836 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2837 sizeof(arg64.LUN_info));
2838 err |= copy_from_user(&arg64.Request, &arg32->Request,
2839 sizeof(arg64.Request));
2840 err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2841 sizeof(arg64.error_info));
2842 err |= get_user(arg64.buf_size, &arg32->buf_size);
2843 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2844 err |= get_user(cp, &arg32->buf);
2845 arg64.buf = compat_ptr(cp);
2846 err |= copy_to_user(p, &arg64, sizeof(arg64));
2851 err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2854 err |= copy_in_user(&arg32->error_info, &p->error_info,
2855 sizeof(arg32->error_info));
2861 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2864 case CCISS_GETPCIINFO:
2865 case CCISS_GETINTINFO:
2866 case CCISS_SETINTINFO:
2867 case CCISS_GETNODENAME:
2868 case CCISS_SETNODENAME:
2869 case CCISS_GETHEARTBEAT:
2870 case CCISS_GETBUSTYPES:
2871 case CCISS_GETFIRMVER:
2872 case CCISS_GETDRIVVER:
2873 case CCISS_REVALIDVOLS:
2874 case CCISS_DEREGDISK:
2875 case CCISS_REGNEWDISK:
2877 case CCISS_RESCANDISK:
2878 case CCISS_GETLUNINFO:
2879 return hpsa_ioctl(dev, cmd, arg);
2881 case CCISS_PASSTHRU32:
2882 return hpsa_ioctl32_passthru(dev, cmd, arg);
2883 case CCISS_BIG_PASSTHRU32:
2884 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2887 return -ENOIOCTLCMD;
2892 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2894 struct hpsa_pci_info pciinfo;
2898 pciinfo.domain = pci_domain_nr(h->pdev->bus);
2899 pciinfo.bus = h->pdev->bus->number;
2900 pciinfo.dev_fn = h->pdev->devfn;
2901 pciinfo.board_id = h->board_id;
2902 if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2907 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2909 DriverVer_type DriverVer;
2910 unsigned char vmaj, vmin, vsubmin;
2913 rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2914 &vmaj, &vmin, &vsubmin);
2916 dev_info(&h->pdev->dev, "driver version string '%s' "
2917 "unrecognized.", HPSA_DRIVER_VERSION);
2922 DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2925 if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2930 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2932 IOCTL_Command_struct iocommand;
2933 struct CommandList *c;
2935 union u64bit temp64;
2939 if (!capable(CAP_SYS_RAWIO))
2941 if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2943 if ((iocommand.buf_size < 1) &&
2944 (iocommand.Request.Type.Direction != XFER_NONE)) {
2947 if (iocommand.buf_size > 0) {
2948 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2951 if (iocommand.Request.Type.Direction == XFER_WRITE) {
2952 /* Copy the data into the buffer we created */
2953 if (copy_from_user(buff, iocommand.buf,
2954 iocommand.buf_size)) {
2959 memset(buff, 0, iocommand.buf_size);
2962 c = cmd_special_alloc(h);
2967 /* Fill in the command type */
2968 c->cmd_type = CMD_IOCTL_PEND;
2969 /* Fill in Command Header */
2970 c->Header.ReplyQueue = 0; /* unused in simple mode */
2971 if (iocommand.buf_size > 0) { /* buffer to fill */
2972 c->Header.SGList = 1;
2973 c->Header.SGTotal = 1;
2974 } else { /* no buffers to fill */
2975 c->Header.SGList = 0;
2976 c->Header.SGTotal = 0;
2978 memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2979 /* use the kernel address the cmd block for tag */
2980 c->Header.Tag.lower = c->busaddr;
2982 /* Fill in Request block */
2983 memcpy(&c->Request, &iocommand.Request,
2984 sizeof(c->Request));
2986 /* Fill in the scatter gather information */
2987 if (iocommand.buf_size > 0) {
2988 temp64.val = pci_map_single(h->pdev, buff,
2989 iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2990 c->SG[0].Addr.lower = temp64.val32.lower;
2991 c->SG[0].Addr.upper = temp64.val32.upper;
2992 c->SG[0].Len = iocommand.buf_size;
2993 c->SG[0].Ext = 0; /* we are not chaining*/
2995 hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
2996 if (iocommand.buf_size > 0)
2997 hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2998 check_ioctl_unit_attention(h, c);
3000 /* Copy the error information out */
3001 memcpy(&iocommand.error_info, c->err_info,
3002 sizeof(iocommand.error_info));
3003 if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
3005 cmd_special_free(h, c);
3008 if (iocommand.Request.Type.Direction == XFER_READ &&
3009 iocommand.buf_size > 0) {
3010 /* Copy the data out of the buffer we created */
3011 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
3013 cmd_special_free(h, c);
3018 cmd_special_free(h, c);
3022 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
3024 BIG_IOCTL_Command_struct *ioc;
3025 struct CommandList *c;
3026 unsigned char **buff = NULL;
3027 int *buff_size = NULL;
3028 union u64bit temp64;
3034 BYTE __user *data_ptr;
3038 if (!capable(CAP_SYS_RAWIO))
3040 ioc = (BIG_IOCTL_Command_struct *)
3041 kmalloc(sizeof(*ioc), GFP_KERNEL);
3046 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
3050 if ((ioc->buf_size < 1) &&
3051 (ioc->Request.Type.Direction != XFER_NONE)) {
3055 /* Check kmalloc limits using all SGs */
3056 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
3060 if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
3064 buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
3069 buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
3074 left = ioc->buf_size;
3075 data_ptr = ioc->buf;
3077 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
3078 buff_size[sg_used] = sz;
3079 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
3080 if (buff[sg_used] == NULL) {
3084 if (ioc->Request.Type.Direction == XFER_WRITE) {
3085 if (copy_from_user(buff[sg_used], data_ptr, sz)) {
3090 memset(buff[sg_used], 0, sz);
3095 c = cmd_special_alloc(h);
3100 c->cmd_type = CMD_IOCTL_PEND;
3101 c->Header.ReplyQueue = 0;
3102 c->Header.SGList = c->Header.SGTotal = sg_used;
3103 memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
3104 c->Header.Tag.lower = c->busaddr;
3105 memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
3106 if (ioc->buf_size > 0) {
3108 for (i = 0; i < sg_used; i++) {
3109 temp64.val = pci_map_single(h->pdev, buff[i],
3110 buff_size[i], PCI_DMA_BIDIRECTIONAL);
3111 c->SG[i].Addr.lower = temp64.val32.lower;
3112 c->SG[i].Addr.upper = temp64.val32.upper;
3113 c->SG[i].Len = buff_size[i];
3114 /* we are not chaining */
3118 hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c);
3120 hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
3121 check_ioctl_unit_attention(h, c);
3122 /* Copy the error information out */
3123 memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
3124 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
3125 cmd_special_free(h, c);
3129 if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
3130 /* Copy the data out of the buffer we created */
3131 BYTE __user *ptr = ioc->buf;
3132 for (i = 0; i < sg_used; i++) {
3133 if (copy_to_user(ptr, buff[i], buff_size[i])) {
3134 cmd_special_free(h, c);
3138 ptr += buff_size[i];
3141 cmd_special_free(h, c);
3145 for (i = 0; i < sg_used; i++)
3154 static void check_ioctl_unit_attention(struct ctlr_info *h,
3155 struct CommandList *c)
3157 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
3158 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
3159 (void) check_for_unit_attention(h, c);
3164 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
3166 struct ctlr_info *h;
3167 void __user *argp = (void __user *)arg;
3169 h = sdev_to_hba(dev);
3172 case CCISS_DEREGDISK:
3173 case CCISS_REGNEWDISK:
3175 hpsa_scan_start(h->scsi_host);
3177 case CCISS_GETPCIINFO:
3178 return hpsa_getpciinfo_ioctl(h, argp);
3179 case CCISS_GETDRIVVER:
3180 return hpsa_getdrivver_ioctl(h, argp);
3181 case CCISS_PASSTHRU:
3182 return hpsa_passthru_ioctl(h, argp);
3183 case CCISS_BIG_PASSTHRU:
3184 return hpsa_big_passthru_ioctl(h, argp);
3190 static int hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
3193 struct CommandList *c;
3198 fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
3199 RAID_CTLR_LUNID, TYPE_MSG);
3200 c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
3202 enqueue_cmd_and_start_io(h, c);
3203 /* Don't wait for completion, the reset won't complete. Don't free
3204 * the command either. This is the last command we will send before
3205 * re-initializing everything, so it doesn't matter and won't leak.
3210 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
3211 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
3214 int pci_dir = XFER_NONE;
3215 struct CommandList *a; /* for commands to be aborted */
3217 c->cmd_type = CMD_IOCTL_PEND;
3218 c->Header.ReplyQueue = 0;
3219 if (buff != NULL && size > 0) {
3220 c->Header.SGList = 1;
3221 c->Header.SGTotal = 1;
3223 c->Header.SGList = 0;
3224 c->Header.SGTotal = 0;
3226 c->Header.Tag.lower = c->busaddr;
3227 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
3229 c->Request.Type.Type = cmd_type;
3230 if (cmd_type == TYPE_CMD) {
3233 /* are we trying to read a vital product page */
3234 if (page_code != 0) {
3235 c->Request.CDB[1] = 0x01;
3236 c->Request.CDB[2] = page_code;
3238 c->Request.CDBLen = 6;
3239 c->Request.Type.Attribute = ATTR_SIMPLE;
3240 c->Request.Type.Direction = XFER_READ;
3241 c->Request.Timeout = 0;
3242 c->Request.CDB[0] = HPSA_INQUIRY;
3243 c->Request.CDB[4] = size & 0xFF;
3245 case HPSA_REPORT_LOG:
3246 case HPSA_REPORT_PHYS:
3247 /* Talking to controller so It's a physical command
3248 mode = 00 target = 0. Nothing to write.
3250 c->Request.CDBLen = 12;
3251 c->Request.Type.Attribute = ATTR_SIMPLE;
3252 c->Request.Type.Direction = XFER_READ;
3253 c->Request.Timeout = 0;
3254 c->Request.CDB[0] = cmd;
3255 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
3256 c->Request.CDB[7] = (size >> 16) & 0xFF;
3257 c->Request.CDB[8] = (size >> 8) & 0xFF;
3258 c->Request.CDB[9] = size & 0xFF;
3260 case HPSA_CACHE_FLUSH:
3261 c->Request.CDBLen = 12;
3262 c->Request.Type.Attribute = ATTR_SIMPLE;
3263 c->Request.Type.Direction = XFER_WRITE;
3264 c->Request.Timeout = 0;
3265 c->Request.CDB[0] = BMIC_WRITE;
3266 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
3267 c->Request.CDB[7] = (size >> 8) & 0xFF;
3268 c->Request.CDB[8] = size & 0xFF;
3270 case TEST_UNIT_READY:
3271 c->Request.CDBLen = 6;
3272 c->Request.Type.Attribute = ATTR_SIMPLE;
3273 c->Request.Type.Direction = XFER_NONE;
3274 c->Request.Timeout = 0;
3277 dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
3281 } else if (cmd_type == TYPE_MSG) {
3284 case HPSA_DEVICE_RESET_MSG:
3285 c->Request.CDBLen = 16;
3286 c->Request.Type.Type = 1; /* It is a MSG not a CMD */
3287 c->Request.Type.Attribute = ATTR_SIMPLE;
3288 c->Request.Type.Direction = XFER_NONE;
3289 c->Request.Timeout = 0; /* Don't time out */
3290 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
3291 c->Request.CDB[0] = cmd;
3292 c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
3293 /* If bytes 4-7 are zero, it means reset the */
3295 c->Request.CDB[4] = 0x00;
3296 c->Request.CDB[5] = 0x00;
3297 c->Request.CDB[6] = 0x00;
3298 c->Request.CDB[7] = 0x00;
3300 case HPSA_ABORT_MSG:
3301 a = buff; /* point to command to be aborted */
3302 dev_dbg(&h->pdev->dev, "Abort Tag:0x%08x:%08x using request Tag:0x%08x:%08x\n",
3303 a->Header.Tag.upper, a->Header.Tag.lower,
3304 c->Header.Tag.upper, c->Header.Tag.lower);
3305 c->Request.CDBLen = 16;
3306 c->Request.Type.Type = TYPE_MSG;
3307 c->Request.Type.Attribute = ATTR_SIMPLE;
3308 c->Request.Type.Direction = XFER_WRITE;
3309 c->Request.Timeout = 0; /* Don't time out */
3310 c->Request.CDB[0] = HPSA_TASK_MANAGEMENT;
3311 c->Request.CDB[1] = HPSA_TMF_ABORT_TASK;
3312 c->Request.CDB[2] = 0x00; /* reserved */
3313 c->Request.CDB[3] = 0x00; /* reserved */
3314 /* Tag to abort goes in CDB[4]-CDB[11] */
3315 c->Request.CDB[4] = a->Header.Tag.lower & 0xFF;
3316 c->Request.CDB[5] = (a->Header.Tag.lower >> 8) & 0xFF;
3317 c->Request.CDB[6] = (a->Header.Tag.lower >> 16) & 0xFF;
3318 c->Request.CDB[7] = (a->Header.Tag.lower >> 24) & 0xFF;
3319 c->Request.CDB[8] = a->Header.Tag.upper & 0xFF;
3320 c->Request.CDB[9] = (a->Header.Tag.upper >> 8) & 0xFF;
3321 c->Request.CDB[10] = (a->Header.Tag.upper >> 16) & 0xFF;
3322 c->Request.CDB[11] = (a->Header.Tag.upper >> 24) & 0xFF;
3323 c->Request.CDB[12] = 0x00; /* reserved */
3324 c->Request.CDB[13] = 0x00; /* reserved */
3325 c->Request.CDB[14] = 0x00; /* reserved */
3326 c->Request.CDB[15] = 0x00; /* reserved */
3329 dev_warn(&h->pdev->dev, "unknown message type %d\n",
3334 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
3338 switch (c->Request.Type.Direction) {
3340 pci_dir = PCI_DMA_FROMDEVICE;
3343 pci_dir = PCI_DMA_TODEVICE;
3346 pci_dir = PCI_DMA_NONE;
3349 pci_dir = PCI_DMA_BIDIRECTIONAL;
3352 hpsa_map_one(h->pdev, c, buff, size, pci_dir);
3358 * Map (physical) PCI mem into (virtual) kernel space
3360 static void __iomem *remap_pci_mem(ulong base, ulong size)
3362 ulong page_base = ((ulong) base) & PAGE_MASK;
3363 ulong page_offs = ((ulong) base) - page_base;
3364 void __iomem *page_remapped = ioremap_nocache(page_base,
3367 return page_remapped ? (page_remapped + page_offs) : NULL;
3370 /* Takes cmds off the submission queue and sends them to the hardware,
3371 * then puts them on the queue of cmds waiting for completion.
3373 static void start_io(struct ctlr_info *h)
3375 struct CommandList *c;
3376 unsigned long flags;
3378 spin_lock_irqsave(&h->lock, flags);
3379 while (!list_empty(&h->reqQ)) {
3380 c = list_entry(h->reqQ.next, struct CommandList, list);
3381 /* can't do anything if fifo is full */
3382 if ((h->access.fifo_full(h))) {
3383 dev_warn(&h->pdev->dev, "fifo full\n");
3387 /* Get the first entry from the Request Q */
3391 /* Put job onto the completed Q */
3394 /* Must increment commands_outstanding before unlocking
3395 * and submitting to avoid race checking for fifo full
3398 h->commands_outstanding++;
3399 if (h->commands_outstanding > h->max_outstanding)
3400 h->max_outstanding = h->commands_outstanding;
3402 /* Tell the controller execute command */
3403 spin_unlock_irqrestore(&h->lock, flags);
3404 h->access.submit_command(h, c);
3405 spin_lock_irqsave(&h->lock, flags);
3407 spin_unlock_irqrestore(&h->lock, flags);
3410 static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
3412 return h->access.command_completed(h, q);
3415 static inline bool interrupt_pending(struct ctlr_info *h)
3417 return h->access.intr_pending(h);
3420 static inline long interrupt_not_for_us(struct ctlr_info *h)
3422 return (h->access.intr_pending(h) == 0) ||
3423 (h->interrupts_enabled == 0);
3426 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
3429 if (unlikely(tag_index >= h->nr_cmds)) {
3430 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3436 static inline void finish_cmd(struct CommandList *c)
3438 unsigned long flags;
3440 spin_lock_irqsave(&c->h->lock, flags);
3442 spin_unlock_irqrestore(&c->h->lock, flags);
3443 dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
3444 if (likely(c->cmd_type == CMD_SCSI))
3445 complete_scsi_command(c);
3446 else if (c->cmd_type == CMD_IOCTL_PEND)
3447 complete(c->waiting);
3450 static inline u32 hpsa_tag_contains_index(u32 tag)
3452 return tag & DIRECT_LOOKUP_BIT;
3455 static inline u32 hpsa_tag_to_index(u32 tag)
3457 return tag >> DIRECT_LOOKUP_SHIFT;
3461 static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
3463 #define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
3464 #define HPSA_SIMPLE_ERROR_BITS 0x03
3465 if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
3466 return tag & ~HPSA_SIMPLE_ERROR_BITS;
3467 return tag & ~HPSA_PERF_ERROR_BITS;
3470 /* process completion of an indexed ("direct lookup") command */
3471 static inline void process_indexed_cmd(struct ctlr_info *h,
3475 struct CommandList *c;
3477 tag_index = hpsa_tag_to_index(raw_tag);
3478 if (!bad_tag(h, tag_index, raw_tag)) {
3479 c = h->cmd_pool + tag_index;
3484 /* process completion of a non-indexed command */
3485 static inline void process_nonindexed_cmd(struct ctlr_info *h,
3489 struct CommandList *c = NULL;
3490 unsigned long flags;
3492 tag = hpsa_tag_discard_error_bits(h, raw_tag);
3493 spin_lock_irqsave(&h->lock, flags);
3494 list_for_each_entry(c, &h->cmpQ, list) {
3495 if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
3496 spin_unlock_irqrestore(&h->lock, flags);
3501 spin_unlock_irqrestore(&h->lock, flags);
3502 bad_tag(h, h->nr_cmds + 1, raw_tag);
3505 /* Some controllers, like p400, will give us one interrupt
3506 * after a soft reset, even if we turned interrupts off.
3507 * Only need to check for this in the hpsa_xxx_discard_completions
3510 static int ignore_bogus_interrupt(struct ctlr_info *h)
3512 if (likely(!reset_devices))
3515 if (likely(h->interrupts_enabled))
3518 dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
3519 "(known firmware bug.) Ignoring.\n");
3525 * Convert &h->q[x] (passed to interrupt handlers) back to h.
3526 * Relies on (h-q[x] == x) being true for x such that
3527 * 0 <= x < MAX_REPLY_QUEUES.
3529 static struct ctlr_info *queue_to_hba(u8 *queue)
3531 return container_of((queue - *queue), struct ctlr_info, q[0]);
3534 static irqreturn_t hpsa_intx_discard_completions(int irq, void *queue)
3536 struct ctlr_info *h = queue_to_hba(queue);
3537 u8 q = *(u8 *) queue;
3540 if (ignore_bogus_interrupt(h))
3543 if (interrupt_not_for_us(h))
3545 h->last_intr_timestamp = get_jiffies_64();
3546 while (interrupt_pending(h)) {
3547 raw_tag = get_next_completion(h, q);
3548 while (raw_tag != FIFO_EMPTY)
3549 raw_tag = next_command(h, q);
3554 static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
3556 struct ctlr_info *h = queue_to_hba(queue);
3558 u8 q = *(u8 *) queue;
3560 if (ignore_bogus_interrupt(h))
3563 h->last_intr_timestamp = get_jiffies_64();
3564 raw_tag = get_next_completion(h, q);
3565 while (raw_tag != FIFO_EMPTY)
3566 raw_tag = next_command(h, q);
3570 static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
3572 struct ctlr_info *h = queue_to_hba((u8 *) queue);
3574 u8 q = *(u8 *) queue;
3576 if (interrupt_not_for_us(h))
3578 h->last_intr_timestamp = get_jiffies_64();
3579 while (interrupt_pending(h)) {
3580 raw_tag = get_next_completion(h, q);
3581 while (raw_tag != FIFO_EMPTY) {
3582 if (likely(hpsa_tag_contains_index(raw_tag)))
3583 process_indexed_cmd(h, raw_tag);
3585 process_nonindexed_cmd(h, raw_tag);
3586 raw_tag = next_command(h, q);
3592 static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
3594 struct ctlr_info *h = queue_to_hba(queue);
3596 u8 q = *(u8 *) queue;
3598 h->last_intr_timestamp = get_jiffies_64();
3599 raw_tag = get_next_completion(h, q);
3600 while (raw_tag != FIFO_EMPTY) {
3601 if (likely(hpsa_tag_contains_index(raw_tag)))
3602 process_indexed_cmd(h, raw_tag);
3604 process_nonindexed_cmd(h, raw_tag);
3605 raw_tag = next_command(h, q);
3610 /* Send a message CDB to the firmware. Careful, this only works
3611 * in simple mode, not performant mode due to the tag lookup.
3612 * We only ever use this immediately after a controller reset.
3614 static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
3618 struct CommandListHeader CommandHeader;
3619 struct RequestBlock Request;
3620 struct ErrDescriptor ErrorDescriptor;
3622 struct Command *cmd;
3623 static const size_t cmd_sz = sizeof(*cmd) +
3624 sizeof(cmd->ErrorDescriptor);
3626 uint32_t paddr32, tag;
3627 void __iomem *vaddr;
3630 vaddr = pci_ioremap_bar(pdev, 0);
3634 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3635 * CCISS commands, so they must be allocated from the lower 4GiB of
3638 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3644 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3650 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3651 * although there's no guarantee, we assume that the address is at
3652 * least 4-byte aligned (most likely, it's page-aligned).
3656 cmd->CommandHeader.ReplyQueue = 0;
3657 cmd->CommandHeader.SGList = 0;
3658 cmd->CommandHeader.SGTotal = 0;
3659 cmd->CommandHeader.Tag.lower = paddr32;
3660 cmd->CommandHeader.Tag.upper = 0;
3661 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3663 cmd->Request.CDBLen = 16;
3664 cmd->Request.Type.Type = TYPE_MSG;
3665 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3666 cmd->Request.Type.Direction = XFER_NONE;
3667 cmd->Request.Timeout = 0; /* Don't time out */
3668 cmd->Request.CDB[0] = opcode;
3669 cmd->Request.CDB[1] = type;
3670 memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
3671 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
3672 cmd->ErrorDescriptor.Addr.upper = 0;
3673 cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
3675 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3677 for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
3678 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3679 if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr32)
3681 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
3686 /* we leak the DMA buffer here ... no choice since the controller could
3687 * still complete the command.
3689 if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
3690 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
3695 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3697 if (tag & HPSA_ERROR_BIT) {
3698 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3703 dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3708 #define hpsa_noop(p) hpsa_message(p, 3, 0)
3710 static int hpsa_controller_hard_reset(struct pci_dev *pdev,
3711 void * __iomem vaddr, u32 use_doorbell)
3717 /* For everything after the P600, the PCI power state method
3718 * of resetting the controller doesn't work, so we have this
3719 * other way using the doorbell register.
3721 dev_info(&pdev->dev, "using doorbell to reset controller\n");
3722 writel(use_doorbell, vaddr + SA5_DOORBELL);
3723 } else { /* Try to do it the PCI power state way */
3725 /* Quoting from the Open CISS Specification: "The Power
3726 * Management Control/Status Register (CSR) controls the power
3727 * state of the device. The normal operating state is D0,
3728 * CSR=00h. The software off state is D3, CSR=03h. To reset
3729 * the controller, place the interface device in D3 then to D0,
3730 * this causes a secondary PCI reset which will reset the
3733 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3736 "hpsa_reset_controller: "
3737 "PCI PM not supported\n");
3740 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3741 /* enter the D3hot power management state */
3742 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3743 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3745 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3749 /* enter the D0 power management state */
3750 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3752 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3755 * The P600 requires a small delay when changing states.
3756 * Otherwise we may think the board did not reset and we bail.
3757 * This for kdump only and is particular to the P600.
3764 static void init_driver_version(char *driver_version, int len)
3766 memset(driver_version, 0, len);
3767 strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
3770 static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
3772 char *driver_version;
3773 int i, size = sizeof(cfgtable->driver_version);
3775 driver_version = kmalloc(size, GFP_KERNEL);
3776 if (!driver_version)
3779 init_driver_version(driver_version, size);
3780 for (i = 0; i < size; i++)
3781 writeb(driver_version[i], &cfgtable->driver_version[i]);
3782 kfree(driver_version);
3786 static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
3787 unsigned char *driver_ver)
3791 for (i = 0; i < sizeof(cfgtable->driver_version); i++)
3792 driver_ver[i] = readb(&cfgtable->driver_version[i]);
3795 static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
3798 char *driver_ver, *old_driver_ver;
3799 int rc, size = sizeof(cfgtable->driver_version);
3801 old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
3802 if (!old_driver_ver)
3804 driver_ver = old_driver_ver + size;
3806 /* After a reset, the 32 bytes of "driver version" in the cfgtable
3807 * should have been changed, otherwise we know the reset failed.
3809 init_driver_version(old_driver_ver, size);
3810 read_driver_ver_from_cfgtable(cfgtable, driver_ver);
3811 rc = !memcmp(driver_ver, old_driver_ver, size);
3812 kfree(old_driver_ver);
3815 /* This does a hard reset of the controller using PCI power management
3816 * states or the using the doorbell register.
3818 static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
3822 u64 cfg_base_addr_index;
3823 void __iomem *vaddr;
3824 unsigned long paddr;
3825 u32 misc_fw_support;
3827 struct CfgTable __iomem *cfgtable;
3830 u16 command_register;
3832 /* For controllers as old as the P600, this is very nearly
3835 * pci_save_state(pci_dev);
3836 * pci_set_power_state(pci_dev, PCI_D3hot);
3837 * pci_set_power_state(pci_dev, PCI_D0);
3838 * pci_restore_state(pci_dev);
3840 * For controllers newer than the P600, the pci power state
3841 * method of resetting doesn't work so we have another way
3842 * using the doorbell register.
3845 rc = hpsa_lookup_board_id(pdev, &board_id);
3846 if (rc < 0 || !ctlr_is_resettable(board_id)) {
3847 dev_warn(&pdev->dev, "Not resetting device.\n");
3851 /* if controller is soft- but not hard resettable... */
3852 if (!ctlr_is_hard_resettable(board_id))
3853 return -ENOTSUPP; /* try soft reset later. */
3855 /* Save the PCI command register */
3856 pci_read_config_word(pdev, 4, &command_register);
3857 /* Turn the board off. This is so that later pci_restore_state()
3858 * won't turn the board on before the rest of config space is ready.
3860 pci_disable_device(pdev);
3861 pci_save_state(pdev);
3863 /* find the first memory BAR, so we can find the cfg table */
3864 rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
3867 vaddr = remap_pci_mem(paddr, 0x250);
3871 /* find cfgtable in order to check if reset via doorbell is supported */
3872 rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
3873 &cfg_base_addr_index, &cfg_offset);
3876 cfgtable = remap_pci_mem(pci_resource_start(pdev,
3877 cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
3882 rc = write_driver_ver_to_cfgtable(cfgtable);
3886 /* If reset via doorbell register is supported, use that.
3887 * There are two such methods. Favor the newest method.
3889 misc_fw_support = readl(&cfgtable->misc_fw_support);
3890 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
3892 use_doorbell = DOORBELL_CTLR_RESET2;
3894 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
3896 dev_warn(&pdev->dev, "Soft reset not supported. "
3897 "Firmware update is required.\n");
3898 rc = -ENOTSUPP; /* try soft reset */
3899 goto unmap_cfgtable;
3903 rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
3905 goto unmap_cfgtable;
3907 pci_restore_state(pdev);
3908 rc = pci_enable_device(pdev);
3910 dev_warn(&pdev->dev, "failed to enable device.\n");
3911 goto unmap_cfgtable;
3913 pci_write_config_word(pdev, 4, command_register);
3915 /* Some devices (notably the HP Smart Array 5i Controller)
3916 need a little pause here */
3917 msleep(HPSA_POST_RESET_PAUSE_MSECS);
3919 /* Wait for board to become not ready, then ready. */
3920 dev_info(&pdev->dev, "Waiting for board to reset.\n");
3921 rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
3923 dev_warn(&pdev->dev,
3924 "failed waiting for board to reset."
3925 " Will try soft reset.\n");
3926 rc = -ENOTSUPP; /* Not expected, but try soft reset later */
3927 goto unmap_cfgtable;
3929 rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
3931 dev_warn(&pdev->dev,
3932 "failed waiting for board to become ready "
3933 "after hard reset\n");
3934 goto unmap_cfgtable;
3937 rc = controller_reset_failed(vaddr);
3939 goto unmap_cfgtable;
3941 dev_warn(&pdev->dev, "Unable to successfully reset "
3942 "controller. Will try soft reset.\n");
3945 dev_info(&pdev->dev, "board ready after hard reset.\n");
3957 * We cannot read the structure directly, for portability we must use
3959 * This is for debug only.
3961 static void print_cfg_table(struct device *dev, struct CfgTable *tb)
3967 dev_info(dev, "Controller Configuration information\n");
3968 dev_info(dev, "------------------------------------\n");
3969 for (i = 0; i < 4; i++)
3970 temp_name[i] = readb(&(tb->Signature[i]));
3971 temp_name[4] = '\0';
3972 dev_info(dev, " Signature = %s\n", temp_name);
3973 dev_info(dev, " Spec Number = %d\n", readl(&(tb->SpecValence)));
3974 dev_info(dev, " Transport methods supported = 0x%x\n",
3975 readl(&(tb->TransportSupport)));
3976 dev_info(dev, " Transport methods active = 0x%x\n",
3977 readl(&(tb->TransportActive)));
3978 dev_info(dev, " Requested transport Method = 0x%x\n",
3979 readl(&(tb->HostWrite.TransportRequest)));
3980 dev_info(dev, " Coalesce Interrupt Delay = 0x%x\n",
3981 readl(&(tb->HostWrite.CoalIntDelay)));
3982 dev_info(dev, " Coalesce Interrupt Count = 0x%x\n",
3983 readl(&(tb->HostWrite.CoalIntCount)));
3984 dev_info(dev, " Max outstanding commands = 0x%d\n",
3985 readl(&(tb->CmdsOutMax)));
3986 dev_info(dev, " Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3987 for (i = 0; i < 16; i++)
3988 temp_name[i] = readb(&(tb->ServerName[i]));
3989 temp_name[16] = '\0';
3990 dev_info(dev, " Server Name = %s\n", temp_name);
3991 dev_info(dev, " Heartbeat Counter = 0x%x\n\n\n",
3992 readl(&(tb->HeartBeat)));
3993 #endif /* HPSA_DEBUG */
3996 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3998 int i, offset, mem_type, bar_type;
4000 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
4003 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
4004 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
4005 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
4008 mem_type = pci_resource_flags(pdev, i) &
4009 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
4011 case PCI_BASE_ADDRESS_MEM_TYPE_32:
4012 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
4013 offset += 4; /* 32 bit */
4015 case PCI_BASE_ADDRESS_MEM_TYPE_64:
4018 default: /* reserved in PCI 2.2 */
4019 dev_warn(&pdev->dev,
4020 "base address is invalid\n");
4025 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
4031 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
4032 * controllers that are capable. If not, we use IO-APIC mode.
4035 static void hpsa_interrupt_mode(struct ctlr_info *h)
4037 #ifdef CONFIG_PCI_MSI
4039 struct msix_entry hpsa_msix_entries[MAX_REPLY_QUEUES];
4041 for (i = 0; i < MAX_REPLY_QUEUES; i++) {
4042 hpsa_msix_entries[i].vector = 0;
4043 hpsa_msix_entries[i].entry = i;
4046 /* Some boards advertise MSI but don't really support it */
4047 if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
4048 (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
4049 goto default_int_mode;
4050 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
4051 dev_info(&h->pdev->dev, "MSIX\n");
4052 err = pci_enable_msix(h->pdev, hpsa_msix_entries,
4055 for (i = 0; i < MAX_REPLY_QUEUES; i++)
4056 h->intr[i] = hpsa_msix_entries[i].vector;
4061 dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
4062 "available\n", err);
4063 goto default_int_mode;
4065 dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
4067 goto default_int_mode;
4070 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
4071 dev_info(&h->pdev->dev, "MSI\n");
4072 if (!pci_enable_msi(h->pdev))
4075 dev_warn(&h->pdev->dev, "MSI init failed\n");
4078 #endif /* CONFIG_PCI_MSI */
4079 /* if we get here we're going to use the default interrupt mode */
4080 h->intr[h->intr_mode] = h->pdev->irq;
4083 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
4086 u32 subsystem_vendor_id, subsystem_device_id;
4088 subsystem_vendor_id = pdev->subsystem_vendor;
4089 subsystem_device_id = pdev->subsystem_device;
4090 *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
4091 subsystem_vendor_id;
4093 for (i = 0; i < ARRAY_SIZE(products); i++)
4094 if (*board_id == products[i].board_id)
4097 if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
4098 subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
4100 dev_warn(&pdev->dev, "unrecognized board ID: "
4101 "0x%08x, ignoring.\n", *board_id);
4104 return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
4107 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
4108 unsigned long *memory_bar)
4112 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
4113 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
4114 /* addressing mode bits already removed */
4115 *memory_bar = pci_resource_start(pdev, i);
4116 dev_dbg(&pdev->dev, "memory BAR = %lx\n",
4120 dev_warn(&pdev->dev, "no memory BAR found\n");
4124 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
4130 iterations = HPSA_BOARD_READY_ITERATIONS;
4132 iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
4134 for (i = 0; i < iterations; i++) {
4135 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
4136 if (wait_for_ready) {
4137 if (scratchpad == HPSA_FIRMWARE_READY)
4140 if (scratchpad != HPSA_FIRMWARE_READY)
4143 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
4145 dev_warn(&pdev->dev, "board not ready, timed out.\n");
4149 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
4150 u32 *cfg_base_addr, u64 *cfg_base_addr_index,
4153 *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
4154 *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
4155 *cfg_base_addr &= (u32) 0x0000ffff;
4156 *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
4157 if (*cfg_base_addr_index == -1) {
4158 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
4164 static int hpsa_find_cfgtables(struct ctlr_info *h)
4168 u64 cfg_base_addr_index;
4172 rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
4173 &cfg_base_addr_index, &cfg_offset);
4176 h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
4177 cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
4180 rc = write_driver_ver_to_cfgtable(h->cfgtable);
4183 /* Find performant mode table. */
4184 trans_offset = readl(&h->cfgtable->TransMethodOffset);
4185 h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
4186 cfg_base_addr_index)+cfg_offset+trans_offset,
4187 sizeof(*h->transtable));
4193 static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
4195 h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
4197 /* Limit commands in memory limited kdump scenario. */
4198 if (reset_devices && h->max_commands > 32)
4199 h->max_commands = 32;
4201 if (h->max_commands < 16) {
4202 dev_warn(&h->pdev->dev, "Controller reports "
4203 "max supported commands of %d, an obvious lie. "
4204 "Using 16. Ensure that firmware is up to date.\n",
4206 h->max_commands = 16;
4210 /* Interrogate the hardware for some limits:
4211 * max commands, max SG elements without chaining, and with chaining,
4212 * SG chain block size, etc.
4214 static void hpsa_find_board_params(struct ctlr_info *h)
4216 hpsa_get_max_perf_mode_cmds(h);
4217 h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
4218 h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
4220 * Limit in-command s/g elements to 32 save dma'able memory.
4221 * Howvever spec says if 0, use 31
4223 h->max_cmd_sg_entries = 31;
4224 if (h->maxsgentries > 512) {
4225 h->max_cmd_sg_entries = 32;
4226 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
4227 h->maxsgentries--; /* save one for chain pointer */
4229 h->maxsgentries = 31; /* default to traditional values */
4233 /* Find out what task management functions are supported and cache */
4234 h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
4237 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
4239 if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
4240 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
4246 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
4247 static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
4252 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
4254 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
4258 /* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result
4259 * in a prefetch beyond physical memory.
4261 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
4265 if (h->board_id != 0x3225103C)
4267 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
4268 dma_prefetch |= 0x8000;
4269 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
4272 static void hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
4276 unsigned long flags;
4278 /* under certain very rare conditions, this can take awhile.
4279 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
4280 * as we enter this code.)
4282 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
4283 spin_lock_irqsave(&h->lock, flags);
4284 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
4285 spin_unlock_irqrestore(&h->lock, flags);
4286 if (!(doorbell_value & CFGTBL_ChangeReq))
4288 /* delay and try again */
4289 usleep_range(10000, 20000);
4293 static int hpsa_enter_simple_mode(struct ctlr_info *h)
4297 trans_support = readl(&(h->cfgtable->TransportSupport));
4298 if (!(trans_support & SIMPLE_MODE))
4301 h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
4302 /* Update the field, and then ring the doorbell */
4303 writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
4304 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
4305 hpsa_wait_for_mode_change_ack(h);
4306 print_cfg_table(&h->pdev->dev, h->cfgtable);
4307 if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
4308 dev_warn(&h->pdev->dev,
4309 "unable to get board into simple mode\n");
4312 h->transMethod = CFGTBL_Trans_Simple;
4316 static int hpsa_pci_init(struct ctlr_info *h)
4318 int prod_index, err;
4320 prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
4323 h->product_name = products[prod_index].product_name;
4324 h->access = *(products[prod_index].access);
4326 pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
4327 PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
4329 err = pci_enable_device(h->pdev);
4331 dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
4335 /* Enable bus mastering (pci_disable_device may disable this) */
4336 pci_set_master(h->pdev);
4338 err = pci_request_regions(h->pdev, HPSA);
4340 dev_err(&h->pdev->dev,
4341 "cannot obtain PCI resources, aborting\n");
4344 hpsa_interrupt_mode(h);
4345 err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
4347 goto err_out_free_res;
4348 h->vaddr = remap_pci_mem(h->paddr, 0x250);
4351 goto err_out_free_res;
4353 err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
4355 goto err_out_free_res;
4356 err = hpsa_find_cfgtables(h);
4358 goto err_out_free_res;
4359 hpsa_find_board_params(h);
4361 if (!hpsa_CISS_signature_present(h)) {
4363 goto err_out_free_res;
4365 hpsa_enable_scsi_prefetch(h);
4366 hpsa_p600_dma_prefetch_quirk(h);
4367 err = hpsa_enter_simple_mode(h);
4369 goto err_out_free_res;
4374 iounmap(h->transtable);
4376 iounmap(h->cfgtable);
4379 pci_disable_device(h->pdev);
4380 pci_release_regions(h->pdev);
4384 static void hpsa_hba_inquiry(struct ctlr_info *h)
4388 #define HBA_INQUIRY_BYTE_COUNT 64
4389 h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
4390 if (!h->hba_inquiry_data)
4392 rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
4393 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
4395 kfree(h->hba_inquiry_data);
4396 h->hba_inquiry_data = NULL;
4400 static int hpsa_init_reset_devices(struct pci_dev *pdev)
4407 /* Reset the controller with a PCI power-cycle or via doorbell */
4408 rc = hpsa_kdump_hard_reset_controller(pdev);
4410 /* -ENOTSUPP here means we cannot reset the controller
4411 * but it's already (and still) up and running in
4412 * "performant mode". Or, it might be 640x, which can't reset
4413 * due to concerns about shared bbwc between 6402/6404 pair.
4415 if (rc == -ENOTSUPP)
4416 return rc; /* just try to do the kdump anyhow. */
4420 /* Now try to get the controller to respond to a no-op */
4421 dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
4422 for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
4423 if (hpsa_noop(pdev) == 0)
4426 dev_warn(&pdev->dev, "no-op failed%s\n",
4427 (i < 11 ? "; re-trying" : ""));
4432 static int hpsa_allocate_cmd_pool(struct ctlr_info *h)
4434 h->cmd_pool_bits = kzalloc(
4435 DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
4436 sizeof(unsigned long), GFP_KERNEL);
4437 h->cmd_pool = pci_alloc_consistent(h->pdev,
4438 h->nr_cmds * sizeof(*h->cmd_pool),
4439 &(h->cmd_pool_dhandle));
4440 h->errinfo_pool = pci_alloc_consistent(h->pdev,
4441 h->nr_cmds * sizeof(*h->errinfo_pool),
4442 &(h->errinfo_pool_dhandle));
4443 if ((h->cmd_pool_bits == NULL)
4444 || (h->cmd_pool == NULL)
4445 || (h->errinfo_pool == NULL)) {
4446 dev_err(&h->pdev->dev, "out of memory in %s", __func__);
4452 static void hpsa_free_cmd_pool(struct ctlr_info *h)
4454 kfree(h->cmd_pool_bits);
4456 pci_free_consistent(h->pdev,
4457 h->nr_cmds * sizeof(struct CommandList),
4458 h->cmd_pool, h->cmd_pool_dhandle);
4459 if (h->errinfo_pool)
4460 pci_free_consistent(h->pdev,
4461 h->nr_cmds * sizeof(struct ErrorInfo),
4463 h->errinfo_pool_dhandle);
4466 static int hpsa_request_irq(struct ctlr_info *h,
4467 irqreturn_t (*msixhandler)(int, void *),
4468 irqreturn_t (*intxhandler)(int, void *))
4473 * initialize h->q[x] = x so that interrupt handlers know which
4476 for (i = 0; i < MAX_REPLY_QUEUES; i++)
4479 if (h->intr_mode == PERF_MODE_INT && h->msix_vector) {
4480 /* If performant mode and MSI-X, use multiple reply queues */
4481 for (i = 0; i < MAX_REPLY_QUEUES; i++)
4482 rc = request_irq(h->intr[i], msixhandler,
4486 /* Use single reply pool */
4487 if (h->msix_vector || h->msi_vector) {
4488 rc = request_irq(h->intr[h->intr_mode],
4489 msixhandler, 0, h->devname,
4490 &h->q[h->intr_mode]);
4492 rc = request_irq(h->intr[h->intr_mode],
4493 intxhandler, IRQF_SHARED, h->devname,
4494 &h->q[h->intr_mode]);
4498 dev_err(&h->pdev->dev, "unable to get irq %d for %s\n",
4499 h->intr[h->intr_mode], h->devname);
4505 static int hpsa_kdump_soft_reset(struct ctlr_info *h)
4507 if (hpsa_send_host_reset(h, RAID_CTLR_LUNID,
4508 HPSA_RESET_TYPE_CONTROLLER)) {
4509 dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
4513 dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
4514 if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
4515 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
4519 dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
4520 if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
4521 dev_warn(&h->pdev->dev, "Board failed to become ready "
4522 "after soft reset.\n");
4529 static void free_irqs(struct ctlr_info *h)
4533 if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) {
4534 /* Single reply queue, only one irq to free */
4536 free_irq(h->intr[i], &h->q[i]);
4540 for (i = 0; i < MAX_REPLY_QUEUES; i++)
4541 free_irq(h->intr[i], &h->q[i]);
4544 static void hpsa_free_irqs_and_disable_msix(struct ctlr_info *h)
4547 #ifdef CONFIG_PCI_MSI
4548 if (h->msix_vector) {
4549 if (h->pdev->msix_enabled)
4550 pci_disable_msix(h->pdev);
4551 } else if (h->msi_vector) {
4552 if (h->pdev->msi_enabled)
4553 pci_disable_msi(h->pdev);
4555 #endif /* CONFIG_PCI_MSI */
4558 static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
4560 hpsa_free_irqs_and_disable_msix(h);
4561 hpsa_free_sg_chain_blocks(h);
4562 hpsa_free_cmd_pool(h);
4563 kfree(h->blockFetchTable);
4564 pci_free_consistent(h->pdev, h->reply_pool_size,
4565 h->reply_pool, h->reply_pool_dhandle);
4569 iounmap(h->transtable);
4571 iounmap(h->cfgtable);
4572 pci_release_regions(h->pdev);
4576 static void remove_ctlr_from_lockup_detector_list(struct ctlr_info *h)
4578 assert_spin_locked(&lockup_detector_lock);
4579 if (!hpsa_lockup_detector)
4581 if (h->lockup_detected)
4582 return; /* already stopped the lockup detector */
4583 list_del(&h->lockup_list);
4586 /* Called when controller lockup detected. */
4587 static void fail_all_cmds_on_list(struct ctlr_info *h, struct list_head *list)
4589 struct CommandList *c = NULL;
4591 assert_spin_locked(&h->lock);
4592 /* Mark all outstanding commands as failed and complete them. */
4593 while (!list_empty(list)) {
4594 c = list_entry(list->next, struct CommandList, list);
4595 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
4600 static void controller_lockup_detected(struct ctlr_info *h)
4602 unsigned long flags;
4604 assert_spin_locked(&lockup_detector_lock);
4605 remove_ctlr_from_lockup_detector_list(h);
4606 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4607 spin_lock_irqsave(&h->lock, flags);
4608 h->lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
4609 spin_unlock_irqrestore(&h->lock, flags);
4610 dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x\n",
4611 h->lockup_detected);
4612 pci_disable_device(h->pdev);
4613 spin_lock_irqsave(&h->lock, flags);
4614 fail_all_cmds_on_list(h, &h->cmpQ);
4615 fail_all_cmds_on_list(h, &h->reqQ);
4616 spin_unlock_irqrestore(&h->lock, flags);
4619 static void detect_controller_lockup(struct ctlr_info *h)
4623 unsigned long flags;
4625 assert_spin_locked(&lockup_detector_lock);
4626 now = get_jiffies_64();
4627 /* If we've received an interrupt recently, we're ok. */
4628 if (time_after64(h->last_intr_timestamp +
4629 (h->heartbeat_sample_interval), now))
4633 * If we've already checked the heartbeat recently, we're ok.
4634 * This could happen if someone sends us a signal. We
4635 * otherwise don't care about signals in this thread.
4637 if (time_after64(h->last_heartbeat_timestamp +
4638 (h->heartbeat_sample_interval), now))
4641 /* If heartbeat has not changed since we last looked, we're not ok. */
4642 spin_lock_irqsave(&h->lock, flags);
4643 heartbeat = readl(&h->cfgtable->HeartBeat);
4644 spin_unlock_irqrestore(&h->lock, flags);
4645 if (h->last_heartbeat == heartbeat) {
4646 controller_lockup_detected(h);
4651 h->last_heartbeat = heartbeat;
4652 h->last_heartbeat_timestamp = now;
4655 static int detect_controller_lockup_thread(void *notused)
4657 struct ctlr_info *h;
4658 unsigned long flags;
4661 struct list_head *this, *tmp;
4663 schedule_timeout_interruptible(HEARTBEAT_SAMPLE_INTERVAL);
4664 if (kthread_should_stop())
4666 spin_lock_irqsave(&lockup_detector_lock, flags);
4667 list_for_each_safe(this, tmp, &hpsa_ctlr_list) {
4668 h = list_entry(this, struct ctlr_info, lockup_list);
4669 detect_controller_lockup(h);
4671 spin_unlock_irqrestore(&lockup_detector_lock, flags);
4676 static void add_ctlr_to_lockup_detector_list(struct ctlr_info *h)
4678 unsigned long flags;
4680 h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
4681 spin_lock_irqsave(&lockup_detector_lock, flags);
4682 list_add_tail(&h->lockup_list, &hpsa_ctlr_list);
4683 spin_unlock_irqrestore(&lockup_detector_lock, flags);
4686 static void start_controller_lockup_detector(struct ctlr_info *h)
4688 /* Start the lockup detector thread if not already started */
4689 if (!hpsa_lockup_detector) {
4690 spin_lock_init(&lockup_detector_lock);
4691 hpsa_lockup_detector =
4692 kthread_run(detect_controller_lockup_thread,
4695 if (!hpsa_lockup_detector) {
4696 dev_warn(&h->pdev->dev,
4697 "Could not start lockup detector thread\n");
4700 add_ctlr_to_lockup_detector_list(h);
4703 static void stop_controller_lockup_detector(struct ctlr_info *h)
4705 unsigned long flags;
4707 spin_lock_irqsave(&lockup_detector_lock, flags);
4708 remove_ctlr_from_lockup_detector_list(h);
4709 /* If the list of ctlr's to monitor is empty, stop the thread */
4710 if (list_empty(&hpsa_ctlr_list)) {
4711 spin_unlock_irqrestore(&lockup_detector_lock, flags);
4712 kthread_stop(hpsa_lockup_detector);
4713 spin_lock_irqsave(&lockup_detector_lock, flags);
4714 hpsa_lockup_detector = NULL;
4716 spin_unlock_irqrestore(&lockup_detector_lock, flags);
4719 static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
4722 struct ctlr_info *h;
4723 int try_soft_reset = 0;
4724 unsigned long flags;
4726 if (number_of_controllers == 0)
4727 printk(KERN_INFO DRIVER_NAME "\n");
4729 rc = hpsa_init_reset_devices(pdev);
4731 if (rc != -ENOTSUPP)
4733 /* If the reset fails in a particular way (it has no way to do
4734 * a proper hard reset, so returns -ENOTSUPP) we can try to do
4735 * a soft reset once we get the controller configured up to the
4736 * point that it can accept a command.
4742 reinit_after_soft_reset:
4744 /* Command structures must be aligned on a 32-byte boundary because
4745 * the 5 lower bits of the address are used by the hardware. and by
4746 * the driver. See comments in hpsa.h for more info.
4748 #define COMMANDLIST_ALIGNMENT 32
4749 BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
4750 h = kzalloc(sizeof(*h), GFP_KERNEL);
4755 h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
4756 INIT_LIST_HEAD(&h->cmpQ);
4757 INIT_LIST_HEAD(&h->reqQ);
4758 spin_lock_init(&h->lock);
4759 spin_lock_init(&h->scan_lock);
4760 rc = hpsa_pci_init(h);
4764 sprintf(h->devname, HPSA "%d", number_of_controllers);
4765 h->ctlr = number_of_controllers;
4766 number_of_controllers++;
4768 /* configure PCI DMA stuff */
4769 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4773 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4777 dev_err(&pdev->dev, "no suitable DMA available\n");
4782 /* make sure the board interrupts are off */
4783 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4785 if (hpsa_request_irq(h, do_hpsa_intr_msi, do_hpsa_intr_intx))
4787 dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
4788 h->devname, pdev->device,
4789 h->intr[h->intr_mode], dac ? "" : " not");
4790 if (hpsa_allocate_cmd_pool(h))
4792 if (hpsa_allocate_sg_chain_blocks(h))
4794 init_waitqueue_head(&h->scan_wait_queue);
4795 h->scan_finished = 1; /* no scan currently in progress */
4797 pci_set_drvdata(pdev, h);
4799 h->scsi_host = NULL;
4800 spin_lock_init(&h->devlock);
4801 hpsa_put_ctlr_into_performant_mode(h);
4803 /* At this point, the controller is ready to take commands.
4804 * Now, if reset_devices and the hard reset didn't work, try
4805 * the soft reset and see if that works.
4807 if (try_soft_reset) {
4809 /* This is kind of gross. We may or may not get a completion
4810 * from the soft reset command, and if we do, then the value
4811 * from the fifo may or may not be valid. So, we wait 10 secs
4812 * after the reset throwing away any completions we get during
4813 * that time. Unregister the interrupt handler and register
4814 * fake ones to scoop up any residual completions.
4816 spin_lock_irqsave(&h->lock, flags);
4817 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4818 spin_unlock_irqrestore(&h->lock, flags);
4820 rc = hpsa_request_irq(h, hpsa_msix_discard_completions,
4821 hpsa_intx_discard_completions);
4823 dev_warn(&h->pdev->dev, "Failed to request_irq after "
4828 rc = hpsa_kdump_soft_reset(h);
4830 /* Neither hard nor soft reset worked, we're hosed. */
4833 dev_info(&h->pdev->dev, "Board READY.\n");
4834 dev_info(&h->pdev->dev,
4835 "Waiting for stale completions to drain.\n");
4836 h->access.set_intr_mask(h, HPSA_INTR_ON);
4838 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4840 rc = controller_reset_failed(h->cfgtable);
4842 dev_info(&h->pdev->dev,
4843 "Soft reset appears to have failed.\n");
4845 /* since the controller's reset, we have to go back and re-init
4846 * everything. Easiest to just forget what we've done and do it
4849 hpsa_undo_allocations_after_kdump_soft_reset(h);
4852 /* don't go to clean4, we already unallocated */
4855 goto reinit_after_soft_reset;
4858 /* Turn the interrupts on so we can service requests */
4859 h->access.set_intr_mask(h, HPSA_INTR_ON);
4861 hpsa_hba_inquiry(h);
4862 hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */
4863 start_controller_lockup_detector(h);
4867 hpsa_free_sg_chain_blocks(h);
4868 hpsa_free_cmd_pool(h);
4876 static void hpsa_flush_cache(struct ctlr_info *h)
4879 struct CommandList *c;
4881 flush_buf = kzalloc(4, GFP_KERNEL);
4885 c = cmd_special_alloc(h);
4887 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
4890 fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
4891 RAID_CTLR_LUNID, TYPE_CMD);
4892 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
4893 if (c->err_info->CommandStatus != 0)
4894 dev_warn(&h->pdev->dev,
4895 "error flushing cache on controller\n");
4896 cmd_special_free(h, c);
4901 static void hpsa_shutdown(struct pci_dev *pdev)
4903 struct ctlr_info *h;
4905 h = pci_get_drvdata(pdev);
4906 /* Turn board interrupts off and send the flush cache command
4907 * sendcmd will turn off interrupt, and send the flush...
4908 * To write all data in the battery backed cache to disks
4910 hpsa_flush_cache(h);
4911 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4912 hpsa_free_irqs_and_disable_msix(h);
4915 static void hpsa_free_device_info(struct ctlr_info *h)
4919 for (i = 0; i < h->ndevices; i++)
4923 static void hpsa_remove_one(struct pci_dev *pdev)
4925 struct ctlr_info *h;
4927 if (pci_get_drvdata(pdev) == NULL) {
4928 dev_err(&pdev->dev, "unable to remove device\n");
4931 h = pci_get_drvdata(pdev);
4932 stop_controller_lockup_detector(h);
4933 hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */
4934 hpsa_shutdown(pdev);
4936 iounmap(h->transtable);
4937 iounmap(h->cfgtable);
4938 hpsa_free_device_info(h);
4939 hpsa_free_sg_chain_blocks(h);
4940 pci_free_consistent(h->pdev,
4941 h->nr_cmds * sizeof(struct CommandList),
4942 h->cmd_pool, h->cmd_pool_dhandle);
4943 pci_free_consistent(h->pdev,
4944 h->nr_cmds * sizeof(struct ErrorInfo),
4945 h->errinfo_pool, h->errinfo_pool_dhandle);
4946 pci_free_consistent(h->pdev, h->reply_pool_size,
4947 h->reply_pool, h->reply_pool_dhandle);
4948 kfree(h->cmd_pool_bits);
4949 kfree(h->blockFetchTable);
4950 kfree(h->hba_inquiry_data);
4951 pci_disable_device(pdev);
4952 pci_release_regions(pdev);
4953 pci_set_drvdata(pdev, NULL);
4957 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
4958 __attribute__((unused)) pm_message_t state)
4963 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
4968 static struct pci_driver hpsa_pci_driver = {
4970 .probe = hpsa_init_one,
4971 .remove = hpsa_remove_one,
4972 .id_table = hpsa_pci_device_id, /* id_table */
4973 .shutdown = hpsa_shutdown,
4974 .suspend = hpsa_suspend,
4975 .resume = hpsa_resume,
4978 /* Fill in bucket_map[], given nsgs (the max number of
4979 * scatter gather elements supported) and bucket[],
4980 * which is an array of 8 integers. The bucket[] array
4981 * contains 8 different DMA transfer sizes (in 16
4982 * byte increments) which the controller uses to fetch
4983 * commands. This function fills in bucket_map[], which
4984 * maps a given number of scatter gather elements to one of
4985 * the 8 DMA transfer sizes. The point of it is to allow the
4986 * controller to only do as much DMA as needed to fetch the
4987 * command, with the DMA transfer size encoded in the lower
4988 * bits of the command address.
4990 static void calc_bucket_map(int bucket[], int num_buckets,
4991 int nsgs, int *bucket_map)
4995 /* even a command with 0 SGs requires 4 blocks */
4996 #define MINIMUM_TRANSFER_BLOCKS 4
4997 #define NUM_BUCKETS 8
4998 /* Note, bucket_map must have nsgs+1 entries. */
4999 for (i = 0; i <= nsgs; i++) {
5000 /* Compute size of a command with i SG entries */
5001 size = i + MINIMUM_TRANSFER_BLOCKS;
5002 b = num_buckets; /* Assume the biggest bucket */
5003 /* Find the bucket that is just big enough */
5004 for (j = 0; j < 8; j++) {
5005 if (bucket[j] >= size) {
5010 /* for a command with i SG entries, use bucket b. */
5015 static void hpsa_enter_performant_mode(struct ctlr_info *h, u32 use_short_tags)
5018 unsigned long register_value;
5020 /* This is a bit complicated. There are 8 registers on
5021 * the controller which we write to to tell it 8 different
5022 * sizes of commands which there may be. It's a way of
5023 * reducing the DMA done to fetch each command. Encoded into
5024 * each command's tag are 3 bits which communicate to the controller
5025 * which of the eight sizes that command fits within. The size of
5026 * each command depends on how many scatter gather entries there are.
5027 * Each SG entry requires 16 bytes. The eight registers are programmed
5028 * with the number of 16-byte blocks a command of that size requires.
5029 * The smallest command possible requires 5 such 16 byte blocks.
5030 * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
5031 * blocks. Note, this only extends to the SG entries contained
5032 * within the command block, and does not extend to chained blocks
5033 * of SG elements. bft[] contains the eight values we write to
5034 * the registers. They are not evenly distributed, but have more
5035 * sizes for small commands, and fewer sizes for larger commands.
5037 int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
5038 BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
5039 /* 5 = 1 s/g entry or 4k
5040 * 6 = 2 s/g entry or 8k
5041 * 8 = 4 s/g entry or 16k
5042 * 10 = 6 s/g entry or 24k
5045 /* Controller spec: zero out this buffer. */
5046 memset(h->reply_pool, 0, h->reply_pool_size);
5048 bft[7] = SG_ENTRIES_IN_CMD + 4;
5049 calc_bucket_map(bft, ARRAY_SIZE(bft),
5050 SG_ENTRIES_IN_CMD, h->blockFetchTable);
5051 for (i = 0; i < 8; i++)
5052 writel(bft[i], &h->transtable->BlockFetch[i]);
5054 /* size of controller ring buffer */
5055 writel(h->max_commands, &h->transtable->RepQSize);
5056 writel(h->nreply_queues, &h->transtable->RepQCount);
5057 writel(0, &h->transtable->RepQCtrAddrLow32);
5058 writel(0, &h->transtable->RepQCtrAddrHigh32);
5060 for (i = 0; i < h->nreply_queues; i++) {
5061 writel(0, &h->transtable->RepQAddr[i].upper);
5062 writel(h->reply_pool_dhandle +
5063 (h->max_commands * sizeof(u64) * i),
5064 &h->transtable->RepQAddr[i].lower);
5067 writel(CFGTBL_Trans_Performant | use_short_tags |
5068 CFGTBL_Trans_enable_directed_msix,
5069 &(h->cfgtable->HostWrite.TransportRequest));
5070 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
5071 hpsa_wait_for_mode_change_ack(h);
5072 register_value = readl(&(h->cfgtable->TransportActive));
5073 if (!(register_value & CFGTBL_Trans_Performant)) {
5074 dev_warn(&h->pdev->dev, "unable to get board into"
5075 " performant mode\n");
5078 /* Change the access methods to the performant access methods */
5079 h->access = SA5_performant_access;
5080 h->transMethod = CFGTBL_Trans_Performant;
5083 static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
5088 if (hpsa_simple_mode)
5091 trans_support = readl(&(h->cfgtable->TransportSupport));
5092 if (!(trans_support & PERFORMANT_MODE))
5095 h->nreply_queues = h->msix_vector ? MAX_REPLY_QUEUES : 1;
5096 hpsa_get_max_perf_mode_cmds(h);
5097 /* Performant mode ring buffer and supporting data structures */
5098 h->reply_pool_size = h->max_commands * sizeof(u64) * h->nreply_queues;
5099 h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
5100 &(h->reply_pool_dhandle));
5102 for (i = 0; i < h->nreply_queues; i++) {
5103 h->reply_queue[i].head = &h->reply_pool[h->max_commands * i];
5104 h->reply_queue[i].size = h->max_commands;
5105 h->reply_queue[i].wraparound = 1; /* spec: init to 1 */
5106 h->reply_queue[i].current_entry = 0;
5109 /* Need a block fetch table for performant mode */
5110 h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
5111 sizeof(u32)), GFP_KERNEL);
5113 if ((h->reply_pool == NULL)
5114 || (h->blockFetchTable == NULL))
5117 hpsa_enter_performant_mode(h,
5118 trans_support & CFGTBL_Trans_use_short_tags);
5124 pci_free_consistent(h->pdev, h->reply_pool_size,
5125 h->reply_pool, h->reply_pool_dhandle);
5126 kfree(h->blockFetchTable);
5130 * This is it. Register the PCI driver information for the cards we control
5131 * the OS will call our registered routines when it finds one of our cards.
5133 static int __init hpsa_init(void)
5135 return pci_register_driver(&hpsa_pci_driver);
5138 static void __exit hpsa_cleanup(void)
5140 pci_unregister_driver(&hpsa_pci_driver);
5143 module_init(hpsa_init);
5144 module_exit(hpsa_cleanup);