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 <asm/atomic.h>
51 #include <linux/kthread.h>
55 /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
56 #define HPSA_DRIVER_VERSION "2.0.2-1"
57 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
59 /* How long to wait (in milliseconds) for board to go into simple mode */
60 #define MAX_CONFIG_WAIT 30000
61 #define MAX_IOCTL_CONFIG_WAIT 1000
63 /*define how many times we will try a command because of bus resets */
64 #define MAX_CMD_RETRIES 3
66 /* Embedded module documentation macros - see modules.h */
67 MODULE_AUTHOR("Hewlett-Packard Company");
68 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
70 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
71 MODULE_VERSION(HPSA_DRIVER_VERSION);
72 MODULE_LICENSE("GPL");
74 static int hpsa_allow_any;
75 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
76 MODULE_PARM_DESC(hpsa_allow_any,
77 "Allow hpsa driver to access unknown HP Smart Array hardware");
78 static int hpsa_simple_mode;
79 module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
80 MODULE_PARM_DESC(hpsa_simple_mode,
81 "Use 'simple mode' rather than 'performant mode'");
83 /* define the PCI info for the cards we can control */
84 static const struct pci_device_id hpsa_pci_device_id[] = {
85 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324a},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324b},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3233},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3350},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3351},
95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3352},
96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3353},
97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3354},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3355},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3356},
100 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
101 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
105 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
107 /* board_id = Subsystem Device ID & Vendor ID
108 * product = Marketing Name for the board
109 * access = Address of the struct of function pointers
111 static struct board_type products[] = {
112 {0x3241103C, "Smart Array P212", &SA5_access},
113 {0x3243103C, "Smart Array P410", &SA5_access},
114 {0x3245103C, "Smart Array P410i", &SA5_access},
115 {0x3247103C, "Smart Array P411", &SA5_access},
116 {0x3249103C, "Smart Array P812", &SA5_access},
117 {0x324a103C, "Smart Array P712m", &SA5_access},
118 {0x324b103C, "Smart Array P711m", &SA5_access},
119 {0x3350103C, "Smart Array", &SA5_access},
120 {0x3351103C, "Smart Array", &SA5_access},
121 {0x3352103C, "Smart Array", &SA5_access},
122 {0x3353103C, "Smart Array", &SA5_access},
123 {0x3354103C, "Smart Array", &SA5_access},
124 {0x3355103C, "Smart Array", &SA5_access},
125 {0x3356103C, "Smart Array", &SA5_access},
126 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
129 static int number_of_controllers;
131 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
132 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
133 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
134 static void start_io(struct ctlr_info *h);
137 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
140 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
141 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c);
142 static struct CommandList *cmd_alloc(struct ctlr_info *h);
143 static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
144 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
145 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
148 static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
149 static void hpsa_scan_start(struct Scsi_Host *);
150 static int hpsa_scan_finished(struct Scsi_Host *sh,
151 unsigned long elapsed_time);
152 static int hpsa_change_queue_depth(struct scsi_device *sdev,
153 int qdepth, int reason);
155 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
156 static int hpsa_slave_alloc(struct scsi_device *sdev);
157 static void hpsa_slave_destroy(struct scsi_device *sdev);
159 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
160 static int check_for_unit_attention(struct ctlr_info *h,
161 struct CommandList *c);
162 static void check_ioctl_unit_attention(struct ctlr_info *h,
163 struct CommandList *c);
164 /* performant mode helper functions */
165 static void calc_bucket_map(int *bucket, int num_buckets,
166 int nsgs, int *bucket_map);
167 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
168 static inline u32 next_command(struct ctlr_info *h);
169 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev,
170 void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
172 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
173 unsigned long *memory_bar);
174 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
175 static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev,
176 void __iomem *vaddr, int wait_for_ready);
177 #define BOARD_NOT_READY 0
178 #define BOARD_READY 1
180 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
182 unsigned long *priv = shost_priv(sdev->host);
183 return (struct ctlr_info *) *priv;
186 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
188 unsigned long *priv = shost_priv(sh);
189 return (struct ctlr_info *) *priv;
192 static int check_for_unit_attention(struct ctlr_info *h,
193 struct CommandList *c)
195 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
198 switch (c->err_info->SenseInfo[12]) {
200 dev_warn(&h->pdev->dev, "hpsa%d: a state change "
201 "detected, command retried\n", h->ctlr);
204 dev_warn(&h->pdev->dev, "hpsa%d: LUN failure "
205 "detected, action required\n", h->ctlr);
207 case REPORT_LUNS_CHANGED:
208 dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
209 "changed, action required\n", h->ctlr);
211 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
215 dev_warn(&h->pdev->dev, "hpsa%d: a power on "
216 "or device reset detected\n", h->ctlr);
218 case UNIT_ATTENTION_CLEARED:
219 dev_warn(&h->pdev->dev, "hpsa%d: unit attention "
220 "cleared by another initiator\n", h->ctlr);
223 dev_warn(&h->pdev->dev, "hpsa%d: unknown "
224 "unit attention detected\n", h->ctlr);
230 static ssize_t host_store_rescan(struct device *dev,
231 struct device_attribute *attr,
232 const char *buf, size_t count)
235 struct Scsi_Host *shost = class_to_shost(dev);
236 h = shost_to_hba(shost);
237 hpsa_scan_start(h->scsi_host);
241 static ssize_t host_show_firmware_revision(struct device *dev,
242 struct device_attribute *attr, char *buf)
245 struct Scsi_Host *shost = class_to_shost(dev);
246 unsigned char *fwrev;
248 h = shost_to_hba(shost);
249 if (!h->hba_inquiry_data)
251 fwrev = &h->hba_inquiry_data[32];
252 return snprintf(buf, 20, "%c%c%c%c\n",
253 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
256 static ssize_t host_show_commands_outstanding(struct device *dev,
257 struct device_attribute *attr, char *buf)
259 struct Scsi_Host *shost = class_to_shost(dev);
260 struct ctlr_info *h = shost_to_hba(shost);
262 return snprintf(buf, 20, "%d\n", h->commands_outstanding);
265 static ssize_t host_show_transport_mode(struct device *dev,
266 struct device_attribute *attr, char *buf)
269 struct Scsi_Host *shost = class_to_shost(dev);
271 h = shost_to_hba(shost);
272 return snprintf(buf, 20, "%s\n",
273 h->transMethod & CFGTBL_Trans_Performant ?
274 "performant" : "simple");
277 /* List of controllers which cannot be hard reset on kexec with reset_devices */
278 static u32 unresettable_controller[] = {
279 0x324a103C, /* Smart Array P712m */
280 0x324b103C, /* SmartArray P711m */
281 0x3223103C, /* Smart Array P800 */
282 0x3234103C, /* Smart Array P400 */
283 0x3235103C, /* Smart Array P400i */
284 0x3211103C, /* Smart Array E200i */
285 0x3212103C, /* Smart Array E200 */
286 0x3213103C, /* Smart Array E200i */
287 0x3214103C, /* Smart Array E200i */
288 0x3215103C, /* Smart Array E200i */
289 0x3237103C, /* Smart Array E500 */
290 0x323D103C, /* Smart Array P700m */
291 0x409C0E11, /* Smart Array 6400 */
292 0x409D0E11, /* Smart Array 6400 EM */
295 /* List of controllers which cannot even be soft reset */
296 static u32 soft_unresettable_controller[] = {
297 /* Exclude 640x boards. These are two pci devices in one slot
298 * which share a battery backed cache module. One controls the
299 * cache, the other accesses the cache through the one that controls
300 * it. If we reset the one controlling the cache, the other will
301 * likely not be happy. Just forbid resetting this conjoined mess.
302 * The 640x isn't really supported by hpsa anyway.
304 0x409C0E11, /* Smart Array 6400 */
305 0x409D0E11, /* Smart Array 6400 EM */
308 static int ctlr_is_hard_resettable(u32 board_id)
312 for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
313 if (unresettable_controller[i] == board_id)
318 static int ctlr_is_soft_resettable(u32 board_id)
322 for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
323 if (soft_unresettable_controller[i] == board_id)
328 static int ctlr_is_resettable(u32 board_id)
330 return ctlr_is_hard_resettable(board_id) ||
331 ctlr_is_soft_resettable(board_id);
334 static ssize_t host_show_resettable(struct device *dev,
335 struct device_attribute *attr, char *buf)
338 struct Scsi_Host *shost = class_to_shost(dev);
340 h = shost_to_hba(shost);
341 return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
344 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
346 return (scsi3addr[3] & 0xC0) == 0x40;
349 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
352 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)
354 static ssize_t raid_level_show(struct device *dev,
355 struct device_attribute *attr, char *buf)
358 unsigned char rlevel;
360 struct scsi_device *sdev;
361 struct hpsa_scsi_dev_t *hdev;
364 sdev = to_scsi_device(dev);
365 h = sdev_to_hba(sdev);
366 spin_lock_irqsave(&h->lock, flags);
367 hdev = sdev->hostdata;
369 spin_unlock_irqrestore(&h->lock, flags);
373 /* Is this even a logical drive? */
374 if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
375 spin_unlock_irqrestore(&h->lock, flags);
376 l = snprintf(buf, PAGE_SIZE, "N/A\n");
380 rlevel = hdev->raid_level;
381 spin_unlock_irqrestore(&h->lock, flags);
382 if (rlevel > RAID_UNKNOWN)
383 rlevel = RAID_UNKNOWN;
384 l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
388 static ssize_t lunid_show(struct device *dev,
389 struct device_attribute *attr, char *buf)
392 struct scsi_device *sdev;
393 struct hpsa_scsi_dev_t *hdev;
395 unsigned char lunid[8];
397 sdev = to_scsi_device(dev);
398 h = sdev_to_hba(sdev);
399 spin_lock_irqsave(&h->lock, flags);
400 hdev = sdev->hostdata;
402 spin_unlock_irqrestore(&h->lock, flags);
405 memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
406 spin_unlock_irqrestore(&h->lock, flags);
407 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
408 lunid[0], lunid[1], lunid[2], lunid[3],
409 lunid[4], lunid[5], lunid[6], lunid[7]);
412 static ssize_t unique_id_show(struct device *dev,
413 struct device_attribute *attr, char *buf)
416 struct scsi_device *sdev;
417 struct hpsa_scsi_dev_t *hdev;
419 unsigned char sn[16];
421 sdev = to_scsi_device(dev);
422 h = sdev_to_hba(sdev);
423 spin_lock_irqsave(&h->lock, flags);
424 hdev = sdev->hostdata;
426 spin_unlock_irqrestore(&h->lock, flags);
429 memcpy(sn, hdev->device_id, sizeof(sn));
430 spin_unlock_irqrestore(&h->lock, flags);
431 return snprintf(buf, 16 * 2 + 2,
432 "%02X%02X%02X%02X%02X%02X%02X%02X"
433 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
434 sn[0], sn[1], sn[2], sn[3],
435 sn[4], sn[5], sn[6], sn[7],
436 sn[8], sn[9], sn[10], sn[11],
437 sn[12], sn[13], sn[14], sn[15]);
440 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
441 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
442 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
443 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
444 static DEVICE_ATTR(firmware_revision, S_IRUGO,
445 host_show_firmware_revision, NULL);
446 static DEVICE_ATTR(commands_outstanding, S_IRUGO,
447 host_show_commands_outstanding, NULL);
448 static DEVICE_ATTR(transport_mode, S_IRUGO,
449 host_show_transport_mode, NULL);
450 static DEVICE_ATTR(resettable, S_IRUGO,
451 host_show_resettable, NULL);
453 static struct device_attribute *hpsa_sdev_attrs[] = {
454 &dev_attr_raid_level,
460 static struct device_attribute *hpsa_shost_attrs[] = {
462 &dev_attr_firmware_revision,
463 &dev_attr_commands_outstanding,
464 &dev_attr_transport_mode,
465 &dev_attr_resettable,
469 static struct scsi_host_template hpsa_driver_template = {
470 .module = THIS_MODULE,
473 .queuecommand = hpsa_scsi_queue_command,
474 .scan_start = hpsa_scan_start,
475 .scan_finished = hpsa_scan_finished,
476 .change_queue_depth = hpsa_change_queue_depth,
478 .use_clustering = ENABLE_CLUSTERING,
479 .eh_device_reset_handler = hpsa_eh_device_reset_handler,
481 .slave_alloc = hpsa_slave_alloc,
482 .slave_destroy = hpsa_slave_destroy,
484 .compat_ioctl = hpsa_compat_ioctl,
486 .sdev_attrs = hpsa_sdev_attrs,
487 .shost_attrs = hpsa_shost_attrs,
491 /* Enqueuing and dequeuing functions for cmdlists. */
492 static inline void addQ(struct list_head *list, struct CommandList *c)
494 list_add_tail(&c->list, list);
497 static inline u32 next_command(struct ctlr_info *h)
501 if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
502 return h->access.command_completed(h);
504 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
505 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
506 (h->reply_pool_head)++;
507 h->commands_outstanding--;
511 /* Check for wraparound */
512 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
513 h->reply_pool_head = h->reply_pool;
514 h->reply_pool_wraparound ^= 1;
519 /* set_performant_mode: Modify the tag for cciss performant
520 * set bit 0 for pull model, bits 3-1 for block fetch
523 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c)
525 if (likely(h->transMethod & CFGTBL_Trans_Performant))
526 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
529 static void enqueue_cmd_and_start_io(struct ctlr_info *h,
530 struct CommandList *c)
534 set_performant_mode(h, c);
535 spin_lock_irqsave(&h->lock, flags);
539 spin_unlock_irqrestore(&h->lock, flags);
542 static inline void removeQ(struct CommandList *c)
544 if (WARN_ON(list_empty(&c->list)))
546 list_del_init(&c->list);
549 static inline int is_hba_lunid(unsigned char scsi3addr[])
551 return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
554 static inline int is_scsi_rev_5(struct ctlr_info *h)
556 if (!h->hba_inquiry_data)
558 if ((h->hba_inquiry_data[2] & 0x07) == 5)
563 static int hpsa_find_target_lun(struct ctlr_info *h,
564 unsigned char scsi3addr[], int bus, int *target, int *lun)
566 /* finds an unused bus, target, lun for a new physical device
567 * assumes h->devlock is held
570 DECLARE_BITMAP(lun_taken, HPSA_MAX_SCSI_DEVS_PER_HBA);
572 memset(&lun_taken[0], 0, HPSA_MAX_SCSI_DEVS_PER_HBA >> 3);
574 for (i = 0; i < h->ndevices; i++) {
575 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
576 set_bit(h->dev[i]->target, lun_taken);
579 for (i = 0; i < HPSA_MAX_SCSI_DEVS_PER_HBA; i++) {
580 if (!test_bit(i, lun_taken)) {
591 /* Add an entry into h->dev[] array. */
592 static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
593 struct hpsa_scsi_dev_t *device,
594 struct hpsa_scsi_dev_t *added[], int *nadded)
596 /* assumes h->devlock is held */
599 unsigned char addr1[8], addr2[8];
600 struct hpsa_scsi_dev_t *sd;
602 if (n >= HPSA_MAX_SCSI_DEVS_PER_HBA) {
603 dev_err(&h->pdev->dev, "too many devices, some will be "
608 /* physical devices do not have lun or target assigned until now. */
609 if (device->lun != -1)
610 /* Logical device, lun is already assigned. */
613 /* If this device a non-zero lun of a multi-lun device
614 * byte 4 of the 8-byte LUN addr will contain the logical
615 * unit no, zero otherise.
617 if (device->scsi3addr[4] == 0) {
618 /* This is not a non-zero lun of a multi-lun device */
619 if (hpsa_find_target_lun(h, device->scsi3addr,
620 device->bus, &device->target, &device->lun) != 0)
625 /* This is a non-zero lun of a multi-lun device.
626 * Search through our list and find the device which
627 * has the same 8 byte LUN address, excepting byte 4.
628 * Assign the same bus and target for this new LUN.
629 * Use the logical unit number from the firmware.
631 memcpy(addr1, device->scsi3addr, 8);
633 for (i = 0; i < n; i++) {
635 memcpy(addr2, sd->scsi3addr, 8);
637 /* differ only in byte 4? */
638 if (memcmp(addr1, addr2, 8) == 0) {
639 device->bus = sd->bus;
640 device->target = sd->target;
641 device->lun = device->scsi3addr[4];
645 if (device->lun == -1) {
646 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
647 " suspect firmware bug or unsupported hardware "
656 added[*nadded] = device;
659 /* initially, (before registering with scsi layer) we don't
660 * know our hostno and we don't want to print anything first
661 * time anyway (the scsi layer's inquiries will show that info)
663 /* if (hostno != -1) */
664 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
665 scsi_device_type(device->devtype), hostno,
666 device->bus, device->target, device->lun);
670 /* Replace an entry from h->dev[] array. */
671 static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
672 int entry, struct hpsa_scsi_dev_t *new_entry,
673 struct hpsa_scsi_dev_t *added[], int *nadded,
674 struct hpsa_scsi_dev_t *removed[], int *nremoved)
676 /* assumes h->devlock is held */
677 BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
678 removed[*nremoved] = h->dev[entry];
682 * New physical devices won't have target/lun assigned yet
683 * so we need to preserve the values in the slot we are replacing.
685 if (new_entry->target == -1) {
686 new_entry->target = h->dev[entry]->target;
687 new_entry->lun = h->dev[entry]->lun;
690 h->dev[entry] = new_entry;
691 added[*nadded] = new_entry;
693 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n",
694 scsi_device_type(new_entry->devtype), hostno, new_entry->bus,
695 new_entry->target, new_entry->lun);
698 /* Remove an entry from h->dev[] array. */
699 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
700 struct hpsa_scsi_dev_t *removed[], int *nremoved)
702 /* assumes h->devlock is held */
704 struct hpsa_scsi_dev_t *sd;
706 BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA);
709 removed[*nremoved] = h->dev[entry];
712 for (i = entry; i < h->ndevices-1; i++)
713 h->dev[i] = h->dev[i+1];
715 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
716 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target,
720 #define SCSI3ADDR_EQ(a, b) ( \
721 (a)[7] == (b)[7] && \
722 (a)[6] == (b)[6] && \
723 (a)[5] == (b)[5] && \
724 (a)[4] == (b)[4] && \
725 (a)[3] == (b)[3] && \
726 (a)[2] == (b)[2] && \
727 (a)[1] == (b)[1] && \
730 static void fixup_botched_add(struct ctlr_info *h,
731 struct hpsa_scsi_dev_t *added)
733 /* called when scsi_add_device fails in order to re-adjust
734 * h->dev[] to match the mid layer's view.
739 spin_lock_irqsave(&h->lock, flags);
740 for (i = 0; i < h->ndevices; i++) {
741 if (h->dev[i] == added) {
742 for (j = i; j < h->ndevices-1; j++)
743 h->dev[j] = h->dev[j+1];
748 spin_unlock_irqrestore(&h->lock, flags);
752 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
753 struct hpsa_scsi_dev_t *dev2)
755 /* we compare everything except lun and target as these
756 * are not yet assigned. Compare parts likely
759 if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
760 sizeof(dev1->scsi3addr)) != 0)
762 if (memcmp(dev1->device_id, dev2->device_id,
763 sizeof(dev1->device_id)) != 0)
765 if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
767 if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
769 if (dev1->devtype != dev2->devtype)
771 if (dev1->bus != dev2->bus)
776 /* Find needle in haystack. If exact match found, return DEVICE_SAME,
777 * and return needle location in *index. If scsi3addr matches, but not
778 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
779 * location in *index. If needle not found, return DEVICE_NOT_FOUND.
781 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
782 struct hpsa_scsi_dev_t *haystack[], int haystack_size,
786 #define DEVICE_NOT_FOUND 0
787 #define DEVICE_CHANGED 1
788 #define DEVICE_SAME 2
789 for (i = 0; i < haystack_size; i++) {
790 if (haystack[i] == NULL) /* previously removed. */
792 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
794 if (device_is_the_same(needle, haystack[i]))
797 return DEVICE_CHANGED;
801 return DEVICE_NOT_FOUND;
804 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
805 struct hpsa_scsi_dev_t *sd[], int nsds)
807 /* sd contains scsi3 addresses and devtypes, and inquiry
808 * data. This function takes what's in sd to be the current
809 * reality and updates h->dev[] to reflect that reality.
811 int i, entry, device_change, changes = 0;
812 struct hpsa_scsi_dev_t *csd;
814 struct hpsa_scsi_dev_t **added, **removed;
815 int nadded, nremoved;
816 struct Scsi_Host *sh = NULL;
818 added = kzalloc(sizeof(*added) * HPSA_MAX_SCSI_DEVS_PER_HBA,
820 removed = kzalloc(sizeof(*removed) * HPSA_MAX_SCSI_DEVS_PER_HBA,
823 if (!added || !removed) {
824 dev_warn(&h->pdev->dev, "out of memory in "
825 "adjust_hpsa_scsi_table\n");
829 spin_lock_irqsave(&h->devlock, flags);
831 /* find any devices in h->dev[] that are not in
832 * sd[] and remove them from h->dev[], and for any
833 * devices which have changed, remove the old device
834 * info and add the new device info.
839 while (i < h->ndevices) {
841 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
842 if (device_change == DEVICE_NOT_FOUND) {
844 hpsa_scsi_remove_entry(h, hostno, i,
846 continue; /* remove ^^^, hence i not incremented */
847 } else if (device_change == DEVICE_CHANGED) {
849 hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
850 added, &nadded, removed, &nremoved);
851 /* Set it to NULL to prevent it from being freed
852 * at the bottom of hpsa_update_scsi_devices()
859 /* Now, make sure every device listed in sd[] is also
860 * listed in h->dev[], adding them if they aren't found
863 for (i = 0; i < nsds; i++) {
864 if (!sd[i]) /* if already added above. */
866 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
867 h->ndevices, &entry);
868 if (device_change == DEVICE_NOT_FOUND) {
870 if (hpsa_scsi_add_entry(h, hostno, sd[i],
871 added, &nadded) != 0)
873 sd[i] = NULL; /* prevent from being freed later. */
874 } else if (device_change == DEVICE_CHANGED) {
875 /* should never happen... */
877 dev_warn(&h->pdev->dev,
878 "device unexpectedly changed.\n");
879 /* but if it does happen, we just ignore that device */
882 spin_unlock_irqrestore(&h->devlock, flags);
884 /* Don't notify scsi mid layer of any changes the first time through
885 * (or if there are no changes) scsi_scan_host will do it later the
886 * first time through.
888 if (hostno == -1 || !changes)
892 /* Notify scsi mid layer of any removed devices */
893 for (i = 0; i < nremoved; i++) {
894 struct scsi_device *sdev =
895 scsi_device_lookup(sh, removed[i]->bus,
896 removed[i]->target, removed[i]->lun);
898 scsi_remove_device(sdev);
899 scsi_device_put(sdev);
901 /* We don't expect to get here.
902 * future cmds to this device will get selection
903 * timeout as if the device was gone.
905 dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d "
906 " for removal.", hostno, removed[i]->bus,
907 removed[i]->target, removed[i]->lun);
913 /* Notify scsi mid layer of any added devices */
914 for (i = 0; i < nadded; i++) {
915 if (scsi_add_device(sh, added[i]->bus,
916 added[i]->target, added[i]->lun) == 0)
918 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, "
919 "device not added.\n", hostno, added[i]->bus,
920 added[i]->target, added[i]->lun);
921 /* now we have to remove it from h->dev,
922 * since it didn't get added to scsi mid layer
924 fixup_botched_add(h, added[i]);
933 * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t *
934 * Assume's h->devlock is held.
936 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
937 int bus, int target, int lun)
940 struct hpsa_scsi_dev_t *sd;
942 for (i = 0; i < h->ndevices; i++) {
944 if (sd->bus == bus && sd->target == target && sd->lun == lun)
950 /* link sdev->hostdata to our per-device structure. */
951 static int hpsa_slave_alloc(struct scsi_device *sdev)
953 struct hpsa_scsi_dev_t *sd;
957 h = sdev_to_hba(sdev);
958 spin_lock_irqsave(&h->devlock, flags);
959 sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
960 sdev_id(sdev), sdev->lun);
963 spin_unlock_irqrestore(&h->devlock, flags);
967 static void hpsa_slave_destroy(struct scsi_device *sdev)
972 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
978 for (i = 0; i < h->nr_cmds; i++) {
979 kfree(h->cmd_sg_list[i]);
980 h->cmd_sg_list[i] = NULL;
982 kfree(h->cmd_sg_list);
983 h->cmd_sg_list = NULL;
986 static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
990 if (h->chainsize <= 0)
993 h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
997 for (i = 0; i < h->nr_cmds; i++) {
998 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
999 h->chainsize, GFP_KERNEL);
1000 if (!h->cmd_sg_list[i])
1006 hpsa_free_sg_chain_blocks(h);
1010 static void hpsa_map_sg_chain_block(struct ctlr_info *h,
1011 struct CommandList *c)
1013 struct SGDescriptor *chain_sg, *chain_block;
1016 chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1017 chain_block = h->cmd_sg_list[c->cmdindex];
1018 chain_sg->Ext = HPSA_SG_CHAIN;
1019 chain_sg->Len = sizeof(*chain_sg) *
1020 (c->Header.SGTotal - h->max_cmd_sg_entries);
1021 temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
1023 chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
1024 chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
1027 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
1028 struct CommandList *c)
1030 struct SGDescriptor *chain_sg;
1031 union u64bit temp64;
1033 if (c->Header.SGTotal <= h->max_cmd_sg_entries)
1036 chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1037 temp64.val32.lower = chain_sg->Addr.lower;
1038 temp64.val32.upper = chain_sg->Addr.upper;
1039 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
1042 static void complete_scsi_command(struct CommandList *cp)
1044 struct scsi_cmnd *cmd;
1045 struct ctlr_info *h;
1046 struct ErrorInfo *ei;
1048 unsigned char sense_key;
1049 unsigned char asc; /* additional sense code */
1050 unsigned char ascq; /* additional sense code qualifier */
1051 unsigned long sense_data_size;
1054 cmd = (struct scsi_cmnd *) cp->scsi_cmd;
1057 scsi_dma_unmap(cmd); /* undo the DMA mappings */
1058 if (cp->Header.SGTotal > h->max_cmd_sg_entries)
1059 hpsa_unmap_sg_chain_block(h, cp);
1061 cmd->result = (DID_OK << 16); /* host byte */
1062 cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
1063 cmd->result |= ei->ScsiStatus;
1065 /* copy the sense data whether we need to or not. */
1066 if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
1067 sense_data_size = SCSI_SENSE_BUFFERSIZE;
1069 sense_data_size = sizeof(ei->SenseInfo);
1070 if (ei->SenseLen < sense_data_size)
1071 sense_data_size = ei->SenseLen;
1073 memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
1074 scsi_set_resid(cmd, ei->ResidualCnt);
1076 if (ei->CommandStatus == 0) {
1077 cmd->scsi_done(cmd);
1082 /* an error has occurred */
1083 switch (ei->CommandStatus) {
1085 case CMD_TARGET_STATUS:
1086 if (ei->ScsiStatus) {
1088 sense_key = 0xf & ei->SenseInfo[2];
1089 /* Get additional sense code */
1090 asc = ei->SenseInfo[12];
1091 /* Get addition sense code qualifier */
1092 ascq = ei->SenseInfo[13];
1095 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1096 if (check_for_unit_attention(h, cp)) {
1097 cmd->result = DID_SOFT_ERROR << 16;
1100 if (sense_key == ILLEGAL_REQUEST) {
1102 * SCSI REPORT_LUNS is commonly unsupported on
1103 * Smart Array. Suppress noisy complaint.
1105 if (cp->Request.CDB[0] == REPORT_LUNS)
1108 /* If ASC/ASCQ indicate Logical Unit
1109 * Not Supported condition,
1111 if ((asc == 0x25) && (ascq == 0x0)) {
1112 dev_warn(&h->pdev->dev, "cp %p "
1113 "has check condition\n", cp);
1118 if (sense_key == NOT_READY) {
1119 /* If Sense is Not Ready, Logical Unit
1120 * Not ready, Manual Intervention
1123 if ((asc == 0x04) && (ascq == 0x03)) {
1124 dev_warn(&h->pdev->dev, "cp %p "
1125 "has check condition: unit "
1126 "not ready, manual "
1127 "intervention required\n", cp);
1131 if (sense_key == ABORTED_COMMAND) {
1132 /* Aborted command is retryable */
1133 dev_warn(&h->pdev->dev, "cp %p "
1134 "has check condition: aborted command: "
1135 "ASC: 0x%x, ASCQ: 0x%x\n",
1137 cmd->result = DID_SOFT_ERROR << 16;
1140 /* Must be some other type of check condition */
1141 dev_warn(&h->pdev->dev, "cp %p has check condition: "
1143 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1144 "Returning result: 0x%x, "
1145 "cmd=[%02x %02x %02x %02x %02x "
1146 "%02x %02x %02x %02x %02x %02x "
1147 "%02x %02x %02x %02x %02x]\n",
1148 cp, sense_key, asc, ascq,
1150 cmd->cmnd[0], cmd->cmnd[1],
1151 cmd->cmnd[2], cmd->cmnd[3],
1152 cmd->cmnd[4], cmd->cmnd[5],
1153 cmd->cmnd[6], cmd->cmnd[7],
1154 cmd->cmnd[8], cmd->cmnd[9],
1155 cmd->cmnd[10], cmd->cmnd[11],
1156 cmd->cmnd[12], cmd->cmnd[13],
1157 cmd->cmnd[14], cmd->cmnd[15]);
1162 /* Problem was not a check condition
1163 * Pass it up to the upper layers...
1165 if (ei->ScsiStatus) {
1166 dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
1167 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
1168 "Returning result: 0x%x\n",
1170 sense_key, asc, ascq,
1172 } else { /* scsi status is zero??? How??? */
1173 dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
1174 "Returning no connection.\n", cp),
1176 /* Ordinarily, this case should never happen,
1177 * but there is a bug in some released firmware
1178 * revisions that allows it to happen if, for
1179 * example, a 4100 backplane loses power and
1180 * the tape drive is in it. We assume that
1181 * it's a fatal error of some kind because we
1182 * can't show that it wasn't. We will make it
1183 * look like selection timeout since that is
1184 * the most common reason for this to occur,
1185 * and it's severe enough.
1188 cmd->result = DID_NO_CONNECT << 16;
1192 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1194 case CMD_DATA_OVERRUN:
1195 dev_warn(&h->pdev->dev, "cp %p has"
1196 " completed with data overrun "
1200 /* print_bytes(cp, sizeof(*cp), 1, 0);
1202 /* We get CMD_INVALID if you address a non-existent device
1203 * instead of a selection timeout (no response). You will
1204 * see this if you yank out a drive, then try to access it.
1205 * This is kind of a shame because it means that any other
1206 * CMD_INVALID (e.g. driver bug) will get interpreted as a
1207 * missing target. */
1208 cmd->result = DID_NO_CONNECT << 16;
1211 case CMD_PROTOCOL_ERR:
1212 dev_warn(&h->pdev->dev, "cp %p has "
1213 "protocol error \n", cp);
1215 case CMD_HARDWARE_ERR:
1216 cmd->result = DID_ERROR << 16;
1217 dev_warn(&h->pdev->dev, "cp %p had hardware error\n", cp);
1219 case CMD_CONNECTION_LOST:
1220 cmd->result = DID_ERROR << 16;
1221 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp);
1224 cmd->result = DID_ABORT << 16;
1225 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n",
1226 cp, ei->ScsiStatus);
1228 case CMD_ABORT_FAILED:
1229 cmd->result = DID_ERROR << 16;
1230 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp);
1232 case CMD_UNSOLICITED_ABORT:
1233 cmd->result = DID_RESET << 16;
1234 dev_warn(&h->pdev->dev, "cp %p aborted do to an unsolicited "
1238 cmd->result = DID_TIME_OUT << 16;
1239 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp);
1241 case CMD_UNABORTABLE:
1242 cmd->result = DID_ERROR << 16;
1243 dev_warn(&h->pdev->dev, "Command unabortable\n");
1246 cmd->result = DID_ERROR << 16;
1247 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
1248 cp, ei->CommandStatus);
1250 cmd->scsi_done(cmd);
1254 static int hpsa_scsi_detect(struct ctlr_info *h)
1256 struct Scsi_Host *sh;
1259 sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
1266 sh->max_channel = 3;
1267 sh->max_cmd_len = MAX_COMMAND_SIZE;
1268 sh->max_lun = HPSA_MAX_LUN;
1269 sh->max_id = HPSA_MAX_LUN;
1270 sh->can_queue = h->nr_cmds;
1271 sh->cmd_per_lun = h->nr_cmds;
1272 sh->sg_tablesize = h->maxsgentries;
1274 sh->hostdata[0] = (unsigned long) h;
1275 sh->irq = h->intr[h->intr_mode];
1276 sh->unique_id = sh->irq;
1277 error = scsi_add_host(sh, &h->pdev->dev);
1284 dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_add_host"
1285 " failed for controller %d\n", h->ctlr);
1289 dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc"
1290 " failed for controller %d\n", h->ctlr);
1294 static void hpsa_pci_unmap(struct pci_dev *pdev,
1295 struct CommandList *c, int sg_used, int data_direction)
1298 union u64bit addr64;
1300 for (i = 0; i < sg_used; i++) {
1301 addr64.val32.lower = c->SG[i].Addr.lower;
1302 addr64.val32.upper = c->SG[i].Addr.upper;
1303 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len,
1308 static void hpsa_map_one(struct pci_dev *pdev,
1309 struct CommandList *cp,
1316 if (buflen == 0 || data_direction == PCI_DMA_NONE) {
1317 cp->Header.SGList = 0;
1318 cp->Header.SGTotal = 0;
1322 addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction);
1323 cp->SG[0].Addr.lower =
1324 (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
1325 cp->SG[0].Addr.upper =
1326 (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
1327 cp->SG[0].Len = buflen;
1328 cp->Header.SGList = (u8) 1; /* no. SGs contig in this cmd */
1329 cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */
1332 static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
1333 struct CommandList *c)
1335 DECLARE_COMPLETION_ONSTACK(wait);
1338 enqueue_cmd_and_start_io(h, c);
1339 wait_for_completion(&wait);
1342 static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
1343 struct CommandList *c, int data_direction)
1345 int retry_count = 0;
1348 memset(c->err_info, 0, sizeof(*c->err_info));
1349 hpsa_scsi_do_simple_cmd_core(h, c);
1351 } while (check_for_unit_attention(h, c) && retry_count <= 3);
1352 hpsa_pci_unmap(h->pdev, c, 1, data_direction);
1355 static void hpsa_scsi_interpret_error(struct CommandList *cp)
1357 struct ErrorInfo *ei;
1358 struct device *d = &cp->h->pdev->dev;
1361 switch (ei->CommandStatus) {
1362 case CMD_TARGET_STATUS:
1363 dev_warn(d, "cmd %p has completed with errors\n", cp);
1364 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp,
1366 if (ei->ScsiStatus == 0)
1367 dev_warn(d, "SCSI status is abnormally zero. "
1368 "(probably indicates selection timeout "
1369 "reported incorrectly due to a known "
1370 "firmware bug, circa July, 2001.)\n");
1372 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
1373 dev_info(d, "UNDERRUN\n");
1375 case CMD_DATA_OVERRUN:
1376 dev_warn(d, "cp %p has completed with data overrun\n", cp);
1379 /* controller unfortunately reports SCSI passthru's
1380 * to non-existent targets as invalid commands.
1382 dev_warn(d, "cp %p is reported invalid (probably means "
1383 "target device no longer present)\n", cp);
1384 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1388 case CMD_PROTOCOL_ERR:
1389 dev_warn(d, "cp %p has protocol error \n", cp);
1391 case CMD_HARDWARE_ERR:
1392 /* cmd->result = DID_ERROR << 16; */
1393 dev_warn(d, "cp %p had hardware error\n", cp);
1395 case CMD_CONNECTION_LOST:
1396 dev_warn(d, "cp %p had connection lost\n", cp);
1399 dev_warn(d, "cp %p was aborted\n", cp);
1401 case CMD_ABORT_FAILED:
1402 dev_warn(d, "cp %p reports abort failed\n", cp);
1404 case CMD_UNSOLICITED_ABORT:
1405 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp);
1408 dev_warn(d, "cp %p timed out\n", cp);
1410 case CMD_UNABORTABLE:
1411 dev_warn(d, "Command unabortable\n");
1414 dev_warn(d, "cp %p returned unknown status %x\n", cp,
1419 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
1420 unsigned char page, unsigned char *buf,
1421 unsigned char bufsize)
1424 struct CommandList *c;
1425 struct ErrorInfo *ei;
1427 c = cmd_special_alloc(h);
1429 if (c == NULL) { /* trouble... */
1430 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1434 fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD);
1435 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1437 if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
1438 hpsa_scsi_interpret_error(c);
1441 cmd_special_free(h, c);
1445 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr)
1448 struct CommandList *c;
1449 struct ErrorInfo *ei;
1451 c = cmd_special_alloc(h);
1453 if (c == NULL) { /* trouble... */
1454 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1458 fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
1459 hpsa_scsi_do_simple_cmd_core(h, c);
1460 /* no unmap needed here because no data xfer. */
1463 if (ei->CommandStatus != 0) {
1464 hpsa_scsi_interpret_error(c);
1467 cmd_special_free(h, c);
1471 static void hpsa_get_raid_level(struct ctlr_info *h,
1472 unsigned char *scsi3addr, unsigned char *raid_level)
1477 *raid_level = RAID_UNKNOWN;
1478 buf = kzalloc(64, GFP_KERNEL);
1481 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64);
1483 *raid_level = buf[8];
1484 if (*raid_level > RAID_UNKNOWN)
1485 *raid_level = RAID_UNKNOWN;
1490 /* Get the device id from inquiry page 0x83 */
1491 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
1492 unsigned char *device_id, int buflen)
1499 buf = kzalloc(64, GFP_KERNEL);
1502 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1504 memcpy(device_id, &buf[8], buflen);
1509 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
1510 struct ReportLUNdata *buf, int bufsize,
1511 int extended_response)
1514 struct CommandList *c;
1515 unsigned char scsi3addr[8];
1516 struct ErrorInfo *ei;
1518 c = cmd_special_alloc(h);
1519 if (c == NULL) { /* trouble... */
1520 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
1523 /* address the controller */
1524 memset(scsi3addr, 0, sizeof(scsi3addr));
1525 fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
1526 buf, bufsize, 0, scsi3addr, TYPE_CMD);
1527 if (extended_response)
1528 c->Request.CDB[1] = extended_response;
1529 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
1531 if (ei->CommandStatus != 0 &&
1532 ei->CommandStatus != CMD_DATA_UNDERRUN) {
1533 hpsa_scsi_interpret_error(c);
1536 cmd_special_free(h, c);
1540 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
1541 struct ReportLUNdata *buf,
1542 int bufsize, int extended_response)
1544 return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response);
1547 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
1548 struct ReportLUNdata *buf, int bufsize)
1550 return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
1553 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
1554 int bus, int target, int lun)
1557 device->target = target;
1561 static int hpsa_update_device_info(struct ctlr_info *h,
1562 unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
1563 unsigned char *is_OBDR_device)
1566 #define OBDR_SIG_OFFSET 43
1567 #define OBDR_TAPE_SIG "$DR-10"
1568 #define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
1569 #define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
1571 unsigned char *inq_buff;
1572 unsigned char *obdr_sig;
1574 inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1578 /* Do an inquiry to the device to see what it is. */
1579 if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1580 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
1581 /* Inquiry failed (msg printed already) */
1582 dev_err(&h->pdev->dev,
1583 "hpsa_update_device_info: inquiry failed\n");
1587 this_device->devtype = (inq_buff[0] & 0x1f);
1588 memcpy(this_device->scsi3addr, scsi3addr, 8);
1589 memcpy(this_device->vendor, &inq_buff[8],
1590 sizeof(this_device->vendor));
1591 memcpy(this_device->model, &inq_buff[16],
1592 sizeof(this_device->model));
1593 memset(this_device->device_id, 0,
1594 sizeof(this_device->device_id));
1595 hpsa_get_device_id(h, scsi3addr, this_device->device_id,
1596 sizeof(this_device->device_id));
1598 if (this_device->devtype == TYPE_DISK &&
1599 is_logical_dev_addr_mode(scsi3addr))
1600 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
1602 this_device->raid_level = RAID_UNKNOWN;
1604 if (is_OBDR_device) {
1605 /* See if this is a One-Button-Disaster-Recovery device
1606 * by looking for "$DR-10" at offset 43 in inquiry data.
1608 obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
1609 *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
1610 strncmp(obdr_sig, OBDR_TAPE_SIG,
1611 OBDR_SIG_LEN) == 0);
1622 static unsigned char *msa2xxx_model[] = {
1631 static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1635 for (i = 0; msa2xxx_model[i]; i++)
1636 if (strncmp(device->model, msa2xxx_model[i],
1637 strlen(msa2xxx_model[i])) == 0)
1642 /* Helper function to assign bus, target, lun mapping of devices.
1643 * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical
1644 * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
1645 * Logical drive target and lun are assigned at this time, but
1646 * physical device lun and target assignment are deferred (assigned
1647 * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
1649 static void figure_bus_target_lun(struct ctlr_info *h,
1650 u8 *lunaddrbytes, int *bus, int *target, int *lun,
1651 struct hpsa_scsi_dev_t *device)
1655 if (is_logical_dev_addr_mode(lunaddrbytes)) {
1656 /* logical device */
1657 if (unlikely(is_scsi_rev_5(h))) {
1658 /* p1210m, logical drives lun assignments
1659 * match SCSI REPORT LUNS data.
1661 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1664 *lun = (lunid & 0x3fff) + 1;
1667 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));
1668 if (is_msa2xxx(h, device)) {
1669 /* msa2xxx way, put logicals on bus 1
1670 * and match target/lun numbers box
1674 *target = (lunid >> 16) & 0x3fff;
1675 *lun = lunid & 0x00ff;
1677 /* Traditional smart array way. */
1680 *target = lunid & 0x3fff;
1684 /* physical device */
1685 if (is_hba_lunid(lunaddrbytes))
1686 if (unlikely(is_scsi_rev_5(h))) {
1687 *bus = 0; /* put p1210m ctlr at 0,0,0 */
1692 *bus = 3; /* traditional smartarray */
1694 *bus = 2; /* physical disk */
1696 *lun = -1; /* we will fill these in later. */
1701 * If there is no lun 0 on a target, linux won't find any devices.
1702 * For the MSA2xxx boxes, we have to manually detect the enclosure
1703 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
1704 * it for some reason. *tmpdevice is the target we're adding,
1705 * this_device is a pointer into the current element of currentsd[]
1706 * that we're building up in update_scsi_devices(), below.
1707 * lunzerobits is a bitmap that tracks which targets already have a
1709 * Returns 1 if an enclosure was added, 0 if not.
1711 static int add_msa2xxx_enclosure_device(struct ctlr_info *h,
1712 struct hpsa_scsi_dev_t *tmpdevice,
1713 struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
1714 int bus, int target, int lun, unsigned long lunzerobits[],
1715 int *nmsa2xxx_enclosures)
1717 unsigned char scsi3addr[8];
1719 if (test_bit(target, lunzerobits))
1720 return 0; /* There is already a lun 0 on this target. */
1722 if (!is_logical_dev_addr_mode(lunaddrbytes))
1723 return 0; /* It's the logical targets that may lack lun 0. */
1725 if (!is_msa2xxx(h, tmpdevice))
1726 return 0; /* It's only the MSA2xxx that have this problem. */
1728 if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */
1731 memset(scsi3addr, 0, 8);
1732 scsi3addr[3] = target;
1733 if (is_hba_lunid(scsi3addr))
1734 return 0; /* Don't add the RAID controller here. */
1736 if (is_scsi_rev_5(h))
1737 return 0; /* p1210m doesn't need to do this. */
1739 #define MAX_MSA2XXX_ENCLOSURES 32
1740 if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) {
1741 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX "
1742 "enclosures exceeded. Check your hardware "
1747 if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
1749 (*nmsa2xxx_enclosures)++;
1750 hpsa_set_bus_target_lun(this_device, bus, target, 0);
1751 set_bit(target, lunzerobits);
1756 * Do CISS_REPORT_PHYS and CISS_REPORT_LOG. Data is returned in physdev,
1757 * logdev. The number of luns in physdev and logdev are returned in
1758 * *nphysicals and *nlogicals, respectively.
1759 * Returns 0 on success, -1 otherwise.
1761 static int hpsa_gather_lun_info(struct ctlr_info *h,
1763 struct ReportLUNdata *physdev, u32 *nphysicals,
1764 struct ReportLUNdata *logdev, u32 *nlogicals)
1766 if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
1767 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
1770 *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
1771 if (*nphysicals > HPSA_MAX_PHYS_LUN) {
1772 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
1773 " %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1774 *nphysicals - HPSA_MAX_PHYS_LUN);
1775 *nphysicals = HPSA_MAX_PHYS_LUN;
1777 if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) {
1778 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
1781 *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
1782 /* Reject Logicals in excess of our max capability. */
1783 if (*nlogicals > HPSA_MAX_LUN) {
1784 dev_warn(&h->pdev->dev,
1785 "maximum logical LUNs (%d) exceeded. "
1786 "%d LUNs ignored.\n", HPSA_MAX_LUN,
1787 *nlogicals - HPSA_MAX_LUN);
1788 *nlogicals = HPSA_MAX_LUN;
1790 if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
1791 dev_warn(&h->pdev->dev,
1792 "maximum logical + physical LUNs (%d) exceeded. "
1793 "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
1794 *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
1795 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
1800 u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
1801 int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
1802 struct ReportLUNdata *logdev_list)
1804 /* Helper function, figure out where the LUN ID info is coming from
1805 * given index i, lists of physical and logical devices, where in
1806 * the list the raid controller is supposed to appear (first or last)
1809 int logicals_start = nphysicals + (raid_ctlr_position == 0);
1810 int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
1812 if (i == raid_ctlr_position)
1813 return RAID_CTLR_LUNID;
1815 if (i < logicals_start)
1816 return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0];
1818 if (i < last_device)
1819 return &logdev_list->LUN[i - nphysicals -
1820 (raid_ctlr_position == 0)][0];
1825 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
1827 /* the idea here is we could get notified
1828 * that some devices have changed, so we do a report
1829 * physical luns and report logical luns cmd, and adjust
1830 * our list of devices accordingly.
1832 * The scsi3addr's of devices won't change so long as the
1833 * adapter is not reset. That means we can rescan and
1834 * tell which devices we already know about, vs. new
1835 * devices, vs. disappearing devices.
1837 struct ReportLUNdata *physdev_list = NULL;
1838 struct ReportLUNdata *logdev_list = NULL;
1841 u32 ndev_allocated = 0;
1842 struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
1844 int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8;
1845 int i, nmsa2xxx_enclosures, ndevs_to_allocate;
1846 int bus, target, lun;
1847 int raid_ctlr_position;
1848 DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR);
1850 currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA,
1852 physdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1853 logdev_list = kzalloc(reportlunsize, GFP_KERNEL);
1854 tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
1856 if (!currentsd || !physdev_list || !logdev_list || !tmpdevice) {
1857 dev_err(&h->pdev->dev, "out of memory\n");
1860 memset(lunzerobits, 0, sizeof(lunzerobits));
1862 if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
1863 logdev_list, &nlogicals))
1866 /* We might see up to 32 MSA2xxx enclosures, actually 8 of them
1867 * but each of them 4 times through different paths. The plus 1
1868 * is for the RAID controller.
1870 ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1;
1872 /* Allocate the per device structures */
1873 for (i = 0; i < ndevs_to_allocate; i++) {
1874 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
1875 if (!currentsd[i]) {
1876 dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
1877 __FILE__, __LINE__);
1883 if (unlikely(is_scsi_rev_5(h)))
1884 raid_ctlr_position = 0;
1886 raid_ctlr_position = nphysicals + nlogicals;
1888 /* adjust our table of devices */
1889 nmsa2xxx_enclosures = 0;
1890 for (i = 0; i < nphysicals + nlogicals + 1; i++) {
1891 u8 *lunaddrbytes, is_OBDR = 0;
1893 /* Figure out where the LUN ID info is coming from */
1894 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
1895 i, nphysicals, nlogicals, physdev_list, logdev_list);
1896 /* skip masked physical devices. */
1897 if (lunaddrbytes[3] & 0xC0 &&
1898 i < nphysicals + (raid_ctlr_position == 0))
1901 /* Get device type, vendor, model, device id */
1902 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
1904 continue; /* skip it if we can't talk to it. */
1905 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun,
1907 this_device = currentsd[ncurrent];
1910 * For the msa2xxx boxes, we have to insert a LUN 0 which
1911 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
1912 * is nonetheless an enclosure device there. We have to
1913 * present that otherwise linux won't find anything if
1914 * there is no lun 0.
1916 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device,
1917 lunaddrbytes, bus, target, lun, lunzerobits,
1918 &nmsa2xxx_enclosures)) {
1920 this_device = currentsd[ncurrent];
1923 *this_device = *tmpdevice;
1924 hpsa_set_bus_target_lun(this_device, bus, target, lun);
1926 switch (this_device->devtype) {
1928 /* We don't *really* support actual CD-ROM devices,
1929 * just "One Button Disaster Recovery" tape drive
1930 * which temporarily pretends to be a CD-ROM drive.
1931 * So we check that the device is really an OBDR tape
1932 * device by checking for "$DR-10" in bytes 43-48 of
1944 case TYPE_MEDIUM_CHANGER:
1948 /* Only present the Smartarray HBA as a RAID controller.
1949 * If it's a RAID controller other than the HBA itself
1950 * (an external RAID controller, MSA500 or similar)
1953 if (!is_hba_lunid(lunaddrbytes))
1960 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA)
1963 adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
1966 for (i = 0; i < ndev_allocated; i++)
1967 kfree(currentsd[i]);
1969 kfree(physdev_list);
1973 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1974 * dma mapping and fills in the scatter gather entries of the
1977 static int hpsa_scatter_gather(struct ctlr_info *h,
1978 struct CommandList *cp,
1979 struct scsi_cmnd *cmd)
1982 struct scatterlist *sg;
1984 int use_sg, i, sg_index, chained;
1985 struct SGDescriptor *curr_sg;
1987 BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1989 use_sg = scsi_dma_map(cmd);
1994 goto sglist_finished;
1999 scsi_for_each_sg(cmd, sg, use_sg, i) {
2000 if (i == h->max_cmd_sg_entries - 1 &&
2001 use_sg > h->max_cmd_sg_entries) {
2003 curr_sg = h->cmd_sg_list[cp->cmdindex];
2006 addr64 = (u64) sg_dma_address(sg);
2007 len = sg_dma_len(sg);
2008 curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
2009 curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
2011 curr_sg->Ext = 0; /* we are not chaining */
2015 if (use_sg + chained > h->maxSG)
2016 h->maxSG = use_sg + chained;
2019 cp->Header.SGList = h->max_cmd_sg_entries;
2020 cp->Header.SGTotal = (u16) (use_sg + 1);
2021 hpsa_map_sg_chain_block(h, cp);
2027 cp->Header.SGList = (u8) use_sg; /* no. SGs contig in this cmd */
2028 cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */
2033 static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd,
2034 void (*done)(struct scsi_cmnd *))
2036 struct ctlr_info *h;
2037 struct hpsa_scsi_dev_t *dev;
2038 unsigned char scsi3addr[8];
2039 struct CommandList *c;
2040 unsigned long flags;
2042 /* Get the ptr to our adapter structure out of cmd->host. */
2043 h = sdev_to_hba(cmd->device);
2044 dev = cmd->device->hostdata;
2046 cmd->result = DID_NO_CONNECT << 16;
2050 memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
2052 /* Need a lock as this is being allocated from the pool */
2053 spin_lock_irqsave(&h->lock, flags);
2055 spin_unlock_irqrestore(&h->lock, flags);
2056 if (c == NULL) { /* trouble... */
2057 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2058 return SCSI_MLQUEUE_HOST_BUSY;
2061 /* Fill in the command list header */
2063 cmd->scsi_done = done; /* save this for use by completion code */
2065 /* save c in case we have to abort it */
2066 cmd->host_scribble = (unsigned char *) c;
2068 c->cmd_type = CMD_SCSI;
2070 c->Header.ReplyQueue = 0; /* unused in simple mode */
2071 memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
2072 c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT);
2073 c->Header.Tag.lower |= DIRECT_LOOKUP_BIT;
2075 /* Fill in the request block... */
2077 c->Request.Timeout = 0;
2078 memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
2079 BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
2080 c->Request.CDBLen = cmd->cmd_len;
2081 memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
2082 c->Request.Type.Type = TYPE_CMD;
2083 c->Request.Type.Attribute = ATTR_SIMPLE;
2084 switch (cmd->sc_data_direction) {
2086 c->Request.Type.Direction = XFER_WRITE;
2088 case DMA_FROM_DEVICE:
2089 c->Request.Type.Direction = XFER_READ;
2092 c->Request.Type.Direction = XFER_NONE;
2094 case DMA_BIDIRECTIONAL:
2095 /* This can happen if a buggy application does a scsi passthru
2096 * and sets both inlen and outlen to non-zero. ( see
2097 * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
2100 c->Request.Type.Direction = XFER_RSVD;
2101 /* This is technically wrong, and hpsa controllers should
2102 * reject it with CMD_INVALID, which is the most correct
2103 * response, but non-fibre backends appear to let it
2104 * slide by, and give the same results as if this field
2105 * were set correctly. Either way is acceptable for
2106 * our purposes here.
2112 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
2113 cmd->sc_data_direction);
2118 if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
2120 return SCSI_MLQUEUE_HOST_BUSY;
2122 enqueue_cmd_and_start_io(h, c);
2123 /* the cmd'll come back via intr handler in complete_scsi_command() */
2127 static DEF_SCSI_QCMD(hpsa_scsi_queue_command)
2129 static void hpsa_scan_start(struct Scsi_Host *sh)
2131 struct ctlr_info *h = shost_to_hba(sh);
2132 unsigned long flags;
2134 /* wait until any scan already in progress is finished. */
2136 spin_lock_irqsave(&h->scan_lock, flags);
2137 if (h->scan_finished)
2139 spin_unlock_irqrestore(&h->scan_lock, flags);
2140 wait_event(h->scan_wait_queue, h->scan_finished);
2141 /* Note: We don't need to worry about a race between this
2142 * thread and driver unload because the midlayer will
2143 * have incremented the reference count, so unload won't
2144 * happen if we're in here.
2147 h->scan_finished = 0; /* mark scan as in progress */
2148 spin_unlock_irqrestore(&h->scan_lock, flags);
2150 hpsa_update_scsi_devices(h, h->scsi_host->host_no);
2152 spin_lock_irqsave(&h->scan_lock, flags);
2153 h->scan_finished = 1; /* mark scan as finished. */
2154 wake_up_all(&h->scan_wait_queue);
2155 spin_unlock_irqrestore(&h->scan_lock, flags);
2158 static int hpsa_scan_finished(struct Scsi_Host *sh,
2159 unsigned long elapsed_time)
2161 struct ctlr_info *h = shost_to_hba(sh);
2162 unsigned long flags;
2165 spin_lock_irqsave(&h->scan_lock, flags);
2166 finished = h->scan_finished;
2167 spin_unlock_irqrestore(&h->scan_lock, flags);
2171 static int hpsa_change_queue_depth(struct scsi_device *sdev,
2172 int qdepth, int reason)
2174 struct ctlr_info *h = sdev_to_hba(sdev);
2176 if (reason != SCSI_QDEPTH_DEFAULT)
2182 if (qdepth > h->nr_cmds)
2183 qdepth = h->nr_cmds;
2184 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
2185 return sdev->queue_depth;
2188 static void hpsa_unregister_scsi(struct ctlr_info *h)
2190 /* we are being forcibly unloaded, and may not refuse. */
2191 scsi_remove_host(h->scsi_host);
2192 scsi_host_put(h->scsi_host);
2193 h->scsi_host = NULL;
2196 static int hpsa_register_scsi(struct ctlr_info *h)
2200 rc = hpsa_scsi_detect(h);
2202 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed"
2203 " hpsa_scsi_detect(), rc is %d\n", rc);
2207 static int wait_for_device_to_become_ready(struct ctlr_info *h,
2208 unsigned char lunaddr[])
2212 int waittime = 1; /* seconds */
2213 struct CommandList *c;
2215 c = cmd_special_alloc(h);
2217 dev_warn(&h->pdev->dev, "out of memory in "
2218 "wait_for_device_to_become_ready.\n");
2222 /* Send test unit ready until device ready, or give up. */
2223 while (count < HPSA_TUR_RETRY_LIMIT) {
2225 /* Wait for a bit. do this first, because if we send
2226 * the TUR right away, the reset will just abort it.
2228 msleep(1000 * waittime);
2231 /* Increase wait time with each try, up to a point. */
2232 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
2233 waittime = waittime * 2;
2235 /* Send the Test Unit Ready */
2236 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD);
2237 hpsa_scsi_do_simple_cmd_core(h, c);
2238 /* no unmap needed here because no data xfer. */
2240 if (c->err_info->CommandStatus == CMD_SUCCESS)
2243 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2244 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
2245 (c->err_info->SenseInfo[2] == NO_SENSE ||
2246 c->err_info->SenseInfo[2] == UNIT_ATTENTION))
2249 dev_warn(&h->pdev->dev, "waiting %d secs "
2250 "for device to become ready.\n", waittime);
2251 rc = 1; /* device not ready. */
2255 dev_warn(&h->pdev->dev, "giving up on device.\n");
2257 dev_warn(&h->pdev->dev, "device is ready.\n");
2259 cmd_special_free(h, c);
2263 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
2264 * complaining. Doing a host- or bus-reset can't do anything good here.
2266 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
2269 struct ctlr_info *h;
2270 struct hpsa_scsi_dev_t *dev;
2272 /* find the controller to which the command to be aborted was sent */
2273 h = sdev_to_hba(scsicmd->device);
2274 if (h == NULL) /* paranoia */
2276 dev = scsicmd->device->hostdata;
2278 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
2279 "device lookup failed.\n");
2282 dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n",
2283 h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
2284 /* send a reset to the SCSI LUN which the command was sent to */
2285 rc = hpsa_send_reset(h, dev->scsi3addr);
2286 if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
2289 dev_warn(&h->pdev->dev, "resetting device failed.\n");
2294 * For operations that cannot sleep, a command block is allocated at init,
2295 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
2296 * which ones are free or in use. Lock must be held when calling this.
2297 * cmd_free() is the complement.
2299 static struct CommandList *cmd_alloc(struct ctlr_info *h)
2301 struct CommandList *c;
2303 union u64bit temp64;
2304 dma_addr_t cmd_dma_handle, err_dma_handle;
2307 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
2308 if (i == h->nr_cmds)
2310 } while (test_and_set_bit
2311 (i & (BITS_PER_LONG - 1),
2312 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
2313 c = h->cmd_pool + i;
2314 memset(c, 0, sizeof(*c));
2315 cmd_dma_handle = h->cmd_pool_dhandle
2317 c->err_info = h->errinfo_pool + i;
2318 memset(c->err_info, 0, sizeof(*c->err_info));
2319 err_dma_handle = h->errinfo_pool_dhandle
2320 + i * sizeof(*c->err_info);
2325 INIT_LIST_HEAD(&c->list);
2326 c->busaddr = (u32) cmd_dma_handle;
2327 temp64.val = (u64) err_dma_handle;
2328 c->ErrDesc.Addr.lower = temp64.val32.lower;
2329 c->ErrDesc.Addr.upper = temp64.val32.upper;
2330 c->ErrDesc.Len = sizeof(*c->err_info);
2336 /* For operations that can wait for kmalloc to possibly sleep,
2337 * this routine can be called. Lock need not be held to call
2338 * cmd_special_alloc. cmd_special_free() is the complement.
2340 static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
2342 struct CommandList *c;
2343 union u64bit temp64;
2344 dma_addr_t cmd_dma_handle, err_dma_handle;
2346 c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
2349 memset(c, 0, sizeof(*c));
2353 c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
2356 if (c->err_info == NULL) {
2357 pci_free_consistent(h->pdev,
2358 sizeof(*c), c, cmd_dma_handle);
2361 memset(c->err_info, 0, sizeof(*c->err_info));
2363 INIT_LIST_HEAD(&c->list);
2364 c->busaddr = (u32) cmd_dma_handle;
2365 temp64.val = (u64) err_dma_handle;
2366 c->ErrDesc.Addr.lower = temp64.val32.lower;
2367 c->ErrDesc.Addr.upper = temp64.val32.upper;
2368 c->ErrDesc.Len = sizeof(*c->err_info);
2374 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
2378 i = c - h->cmd_pool;
2379 clear_bit(i & (BITS_PER_LONG - 1),
2380 h->cmd_pool_bits + (i / BITS_PER_LONG));
2384 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c)
2386 union u64bit temp64;
2388 temp64.val32.lower = c->ErrDesc.Addr.lower;
2389 temp64.val32.upper = c->ErrDesc.Addr.upper;
2390 pci_free_consistent(h->pdev, sizeof(*c->err_info),
2391 c->err_info, (dma_addr_t) temp64.val);
2392 pci_free_consistent(h->pdev, sizeof(*c),
2393 c, (dma_addr_t) (c->busaddr & DIRECT_LOOKUP_MASK));
2396 #ifdef CONFIG_COMPAT
2398 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg)
2400 IOCTL32_Command_struct __user *arg32 =
2401 (IOCTL32_Command_struct __user *) arg;
2402 IOCTL_Command_struct arg64;
2403 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
2407 memset(&arg64, 0, sizeof(arg64));
2409 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2410 sizeof(arg64.LUN_info));
2411 err |= copy_from_user(&arg64.Request, &arg32->Request,
2412 sizeof(arg64.Request));
2413 err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2414 sizeof(arg64.error_info));
2415 err |= get_user(arg64.buf_size, &arg32->buf_size);
2416 err |= get_user(cp, &arg32->buf);
2417 arg64.buf = compat_ptr(cp);
2418 err |= copy_to_user(p, &arg64, sizeof(arg64));
2423 err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p);
2426 err |= copy_in_user(&arg32->error_info, &p->error_info,
2427 sizeof(arg32->error_info));
2433 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
2436 BIG_IOCTL32_Command_struct __user *arg32 =
2437 (BIG_IOCTL32_Command_struct __user *) arg;
2438 BIG_IOCTL_Command_struct arg64;
2439 BIG_IOCTL_Command_struct __user *p =
2440 compat_alloc_user_space(sizeof(arg64));
2444 memset(&arg64, 0, sizeof(arg64));
2446 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
2447 sizeof(arg64.LUN_info));
2448 err |= copy_from_user(&arg64.Request, &arg32->Request,
2449 sizeof(arg64.Request));
2450 err |= copy_from_user(&arg64.error_info, &arg32->error_info,
2451 sizeof(arg64.error_info));
2452 err |= get_user(arg64.buf_size, &arg32->buf_size);
2453 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
2454 err |= get_user(cp, &arg32->buf);
2455 arg64.buf = compat_ptr(cp);
2456 err |= copy_to_user(p, &arg64, sizeof(arg64));
2461 err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p);
2464 err |= copy_in_user(&arg32->error_info, &p->error_info,
2465 sizeof(arg32->error_info));
2471 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg)
2474 case CCISS_GETPCIINFO:
2475 case CCISS_GETINTINFO:
2476 case CCISS_SETINTINFO:
2477 case CCISS_GETNODENAME:
2478 case CCISS_SETNODENAME:
2479 case CCISS_GETHEARTBEAT:
2480 case CCISS_GETBUSTYPES:
2481 case CCISS_GETFIRMVER:
2482 case CCISS_GETDRIVVER:
2483 case CCISS_REVALIDVOLS:
2484 case CCISS_DEREGDISK:
2485 case CCISS_REGNEWDISK:
2487 case CCISS_RESCANDISK:
2488 case CCISS_GETLUNINFO:
2489 return hpsa_ioctl(dev, cmd, arg);
2491 case CCISS_PASSTHRU32:
2492 return hpsa_ioctl32_passthru(dev, cmd, arg);
2493 case CCISS_BIG_PASSTHRU32:
2494 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
2497 return -ENOIOCTLCMD;
2502 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
2504 struct hpsa_pci_info pciinfo;
2508 pciinfo.domain = pci_domain_nr(h->pdev->bus);
2509 pciinfo.bus = h->pdev->bus->number;
2510 pciinfo.dev_fn = h->pdev->devfn;
2511 pciinfo.board_id = h->board_id;
2512 if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
2517 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
2519 DriverVer_type DriverVer;
2520 unsigned char vmaj, vmin, vsubmin;
2523 rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
2524 &vmaj, &vmin, &vsubmin);
2526 dev_info(&h->pdev->dev, "driver version string '%s' "
2527 "unrecognized.", HPSA_DRIVER_VERSION);
2532 DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
2535 if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
2540 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2542 IOCTL_Command_struct iocommand;
2543 struct CommandList *c;
2545 union u64bit temp64;
2549 if (!capable(CAP_SYS_RAWIO))
2551 if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
2553 if ((iocommand.buf_size < 1) &&
2554 (iocommand.Request.Type.Direction != XFER_NONE)) {
2557 if (iocommand.buf_size > 0) {
2558 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
2561 if (iocommand.Request.Type.Direction == XFER_WRITE) {
2562 /* Copy the data into the buffer we created */
2563 if (copy_from_user(buff, iocommand.buf,
2564 iocommand.buf_size)) {
2569 memset(buff, 0, iocommand.buf_size);
2572 c = cmd_special_alloc(h);
2577 /* Fill in the command type */
2578 c->cmd_type = CMD_IOCTL_PEND;
2579 /* Fill in Command Header */
2580 c->Header.ReplyQueue = 0; /* unused in simple mode */
2581 if (iocommand.buf_size > 0) { /* buffer to fill */
2582 c->Header.SGList = 1;
2583 c->Header.SGTotal = 1;
2584 } else { /* no buffers to fill */
2585 c->Header.SGList = 0;
2586 c->Header.SGTotal = 0;
2588 memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
2589 /* use the kernel address the cmd block for tag */
2590 c->Header.Tag.lower = c->busaddr;
2592 /* Fill in Request block */
2593 memcpy(&c->Request, &iocommand.Request,
2594 sizeof(c->Request));
2596 /* Fill in the scatter gather information */
2597 if (iocommand.buf_size > 0) {
2598 temp64.val = pci_map_single(h->pdev, buff,
2599 iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
2600 c->SG[0].Addr.lower = temp64.val32.lower;
2601 c->SG[0].Addr.upper = temp64.val32.upper;
2602 c->SG[0].Len = iocommand.buf_size;
2603 c->SG[0].Ext = 0; /* we are not chaining*/
2605 hpsa_scsi_do_simple_cmd_core(h, c);
2606 if (iocommand.buf_size > 0)
2607 hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
2608 check_ioctl_unit_attention(h, c);
2610 /* Copy the error information out */
2611 memcpy(&iocommand.error_info, c->err_info,
2612 sizeof(iocommand.error_info));
2613 if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
2615 cmd_special_free(h, c);
2618 if (iocommand.Request.Type.Direction == XFER_READ &&
2619 iocommand.buf_size > 0) {
2620 /* Copy the data out of the buffer we created */
2621 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
2623 cmd_special_free(h, c);
2628 cmd_special_free(h, c);
2632 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
2634 BIG_IOCTL_Command_struct *ioc;
2635 struct CommandList *c;
2636 unsigned char **buff = NULL;
2637 int *buff_size = NULL;
2638 union u64bit temp64;
2644 BYTE __user *data_ptr;
2648 if (!capable(CAP_SYS_RAWIO))
2650 ioc = (BIG_IOCTL_Command_struct *)
2651 kmalloc(sizeof(*ioc), GFP_KERNEL);
2656 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
2660 if ((ioc->buf_size < 1) &&
2661 (ioc->Request.Type.Direction != XFER_NONE)) {
2665 /* Check kmalloc limits using all SGs */
2666 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
2670 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
2674 buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
2679 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
2684 left = ioc->buf_size;
2685 data_ptr = ioc->buf;
2687 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
2688 buff_size[sg_used] = sz;
2689 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
2690 if (buff[sg_used] == NULL) {
2694 if (ioc->Request.Type.Direction == XFER_WRITE) {
2695 if (copy_from_user(buff[sg_used], data_ptr, sz)) {
2700 memset(buff[sg_used], 0, sz);
2705 c = cmd_special_alloc(h);
2710 c->cmd_type = CMD_IOCTL_PEND;
2711 c->Header.ReplyQueue = 0;
2712 c->Header.SGList = c->Header.SGTotal = sg_used;
2713 memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
2714 c->Header.Tag.lower = c->busaddr;
2715 memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
2716 if (ioc->buf_size > 0) {
2718 for (i = 0; i < sg_used; i++) {
2719 temp64.val = pci_map_single(h->pdev, buff[i],
2720 buff_size[i], PCI_DMA_BIDIRECTIONAL);
2721 c->SG[i].Addr.lower = temp64.val32.lower;
2722 c->SG[i].Addr.upper = temp64.val32.upper;
2723 c->SG[i].Len = buff_size[i];
2724 /* we are not chaining */
2728 hpsa_scsi_do_simple_cmd_core(h, c);
2730 hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
2731 check_ioctl_unit_attention(h, c);
2732 /* Copy the error information out */
2733 memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
2734 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
2735 cmd_special_free(h, c);
2739 if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
2740 /* Copy the data out of the buffer we created */
2741 BYTE __user *ptr = ioc->buf;
2742 for (i = 0; i < sg_used; i++) {
2743 if (copy_to_user(ptr, buff[i], buff_size[i])) {
2744 cmd_special_free(h, c);
2748 ptr += buff_size[i];
2751 cmd_special_free(h, c);
2755 for (i = 0; i < sg_used; i++)
2764 static void check_ioctl_unit_attention(struct ctlr_info *h,
2765 struct CommandList *c)
2767 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
2768 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
2769 (void) check_for_unit_attention(h, c);
2774 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg)
2776 struct ctlr_info *h;
2777 void __user *argp = (void __user *)arg;
2779 h = sdev_to_hba(dev);
2782 case CCISS_DEREGDISK:
2783 case CCISS_REGNEWDISK:
2785 hpsa_scan_start(h->scsi_host);
2787 case CCISS_GETPCIINFO:
2788 return hpsa_getpciinfo_ioctl(h, argp);
2789 case CCISS_GETDRIVVER:
2790 return hpsa_getdrivver_ioctl(h, argp);
2791 case CCISS_PASSTHRU:
2792 return hpsa_passthru_ioctl(h, argp);
2793 case CCISS_BIG_PASSTHRU:
2794 return hpsa_big_passthru_ioctl(h, argp);
2800 static int __devinit hpsa_send_host_reset(struct ctlr_info *h,
2801 unsigned char *scsi3addr, u8 reset_type)
2803 struct CommandList *c;
2808 fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
2809 RAID_CTLR_LUNID, TYPE_MSG);
2810 c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
2812 enqueue_cmd_and_start_io(h, c);
2813 /* Don't wait for completion, the reset won't complete. Don't free
2814 * the command either. This is the last command we will send before
2815 * re-initializing everything, so it doesn't matter and won't leak.
2820 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
2821 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr,
2824 int pci_dir = XFER_NONE;
2826 c->cmd_type = CMD_IOCTL_PEND;
2827 c->Header.ReplyQueue = 0;
2828 if (buff != NULL && size > 0) {
2829 c->Header.SGList = 1;
2830 c->Header.SGTotal = 1;
2832 c->Header.SGList = 0;
2833 c->Header.SGTotal = 0;
2835 c->Header.Tag.lower = c->busaddr;
2836 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
2838 c->Request.Type.Type = cmd_type;
2839 if (cmd_type == TYPE_CMD) {
2842 /* are we trying to read a vital product page */
2843 if (page_code != 0) {
2844 c->Request.CDB[1] = 0x01;
2845 c->Request.CDB[2] = page_code;
2847 c->Request.CDBLen = 6;
2848 c->Request.Type.Attribute = ATTR_SIMPLE;
2849 c->Request.Type.Direction = XFER_READ;
2850 c->Request.Timeout = 0;
2851 c->Request.CDB[0] = HPSA_INQUIRY;
2852 c->Request.CDB[4] = size & 0xFF;
2854 case HPSA_REPORT_LOG:
2855 case HPSA_REPORT_PHYS:
2856 /* Talking to controller so It's a physical command
2857 mode = 00 target = 0. Nothing to write.
2859 c->Request.CDBLen = 12;
2860 c->Request.Type.Attribute = ATTR_SIMPLE;
2861 c->Request.Type.Direction = XFER_READ;
2862 c->Request.Timeout = 0;
2863 c->Request.CDB[0] = cmd;
2864 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
2865 c->Request.CDB[7] = (size >> 16) & 0xFF;
2866 c->Request.CDB[8] = (size >> 8) & 0xFF;
2867 c->Request.CDB[9] = size & 0xFF;
2869 case HPSA_CACHE_FLUSH:
2870 c->Request.CDBLen = 12;
2871 c->Request.Type.Attribute = ATTR_SIMPLE;
2872 c->Request.Type.Direction = XFER_WRITE;
2873 c->Request.Timeout = 0;
2874 c->Request.CDB[0] = BMIC_WRITE;
2875 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
2877 case TEST_UNIT_READY:
2878 c->Request.CDBLen = 6;
2879 c->Request.Type.Attribute = ATTR_SIMPLE;
2880 c->Request.Type.Direction = XFER_NONE;
2881 c->Request.Timeout = 0;
2884 dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
2888 } else if (cmd_type == TYPE_MSG) {
2891 case HPSA_DEVICE_RESET_MSG:
2892 c->Request.CDBLen = 16;
2893 c->Request.Type.Type = 1; /* It is a MSG not a CMD */
2894 c->Request.Type.Attribute = ATTR_SIMPLE;
2895 c->Request.Type.Direction = XFER_NONE;
2896 c->Request.Timeout = 0; /* Don't time out */
2897 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
2898 c->Request.CDB[0] = cmd;
2899 c->Request.CDB[1] = 0x03; /* Reset target above */
2900 /* If bytes 4-7 are zero, it means reset the */
2902 c->Request.CDB[4] = 0x00;
2903 c->Request.CDB[5] = 0x00;
2904 c->Request.CDB[6] = 0x00;
2905 c->Request.CDB[7] = 0x00;
2909 dev_warn(&h->pdev->dev, "unknown message type %d\n",
2914 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
2918 switch (c->Request.Type.Direction) {
2920 pci_dir = PCI_DMA_FROMDEVICE;
2923 pci_dir = PCI_DMA_TODEVICE;
2926 pci_dir = PCI_DMA_NONE;
2929 pci_dir = PCI_DMA_BIDIRECTIONAL;
2932 hpsa_map_one(h->pdev, c, buff, size, pci_dir);
2938 * Map (physical) PCI mem into (virtual) kernel space
2940 static void __iomem *remap_pci_mem(ulong base, ulong size)
2942 ulong page_base = ((ulong) base) & PAGE_MASK;
2943 ulong page_offs = ((ulong) base) - page_base;
2944 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
2946 return page_remapped ? (page_remapped + page_offs) : NULL;
2949 /* Takes cmds off the submission queue and sends them to the hardware,
2950 * then puts them on the queue of cmds waiting for completion.
2952 static void start_io(struct ctlr_info *h)
2954 struct CommandList *c;
2956 while (!list_empty(&h->reqQ)) {
2957 c = list_entry(h->reqQ.next, struct CommandList, list);
2958 /* can't do anything if fifo is full */
2959 if ((h->access.fifo_full(h))) {
2960 dev_warn(&h->pdev->dev, "fifo full\n");
2964 /* Get the first entry from the Request Q */
2968 /* Tell the controller execute command */
2969 h->access.submit_command(h, c);
2971 /* Put job onto the completed Q */
2976 static inline unsigned long get_next_completion(struct ctlr_info *h)
2978 return h->access.command_completed(h);
2981 static inline bool interrupt_pending(struct ctlr_info *h)
2983 return h->access.intr_pending(h);
2986 static inline long interrupt_not_for_us(struct ctlr_info *h)
2988 return (h->access.intr_pending(h) == 0) ||
2989 (h->interrupts_enabled == 0);
2992 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
2995 if (unlikely(tag_index >= h->nr_cmds)) {
2996 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3002 static inline void finish_cmd(struct CommandList *c, u32 raw_tag)
3005 if (likely(c->cmd_type == CMD_SCSI))
3006 complete_scsi_command(c);
3007 else if (c->cmd_type == CMD_IOCTL_PEND)
3008 complete(c->waiting);
3011 static inline u32 hpsa_tag_contains_index(u32 tag)
3013 return tag & DIRECT_LOOKUP_BIT;
3016 static inline u32 hpsa_tag_to_index(u32 tag)
3018 return tag >> DIRECT_LOOKUP_SHIFT;
3022 static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
3024 #define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
3025 #define HPSA_SIMPLE_ERROR_BITS 0x03
3026 if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
3027 return tag & ~HPSA_SIMPLE_ERROR_BITS;
3028 return tag & ~HPSA_PERF_ERROR_BITS;
3031 /* process completion of an indexed ("direct lookup") command */
3032 static inline u32 process_indexed_cmd(struct ctlr_info *h,
3036 struct CommandList *c;
3038 tag_index = hpsa_tag_to_index(raw_tag);
3039 if (bad_tag(h, tag_index, raw_tag))
3040 return next_command(h);
3041 c = h->cmd_pool + tag_index;
3042 finish_cmd(c, raw_tag);
3043 return next_command(h);
3046 /* process completion of a non-indexed command */
3047 static inline u32 process_nonindexed_cmd(struct ctlr_info *h,
3051 struct CommandList *c = NULL;
3053 tag = hpsa_tag_discard_error_bits(h, raw_tag);
3054 list_for_each_entry(c, &h->cmpQ, list) {
3055 if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
3056 finish_cmd(c, raw_tag);
3057 return next_command(h);
3060 bad_tag(h, h->nr_cmds + 1, raw_tag);
3061 return next_command(h);
3064 /* Some controllers, like p400, will give us one interrupt
3065 * after a soft reset, even if we turned interrupts off.
3066 * Only need to check for this in the hpsa_xxx_discard_completions
3069 static int ignore_bogus_interrupt(struct ctlr_info *h)
3071 if (likely(!reset_devices))
3074 if (likely(h->interrupts_enabled))
3077 dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
3078 "(known firmware bug.) Ignoring.\n");
3083 static irqreturn_t hpsa_intx_discard_completions(int irq, void *dev_id)
3085 struct ctlr_info *h = dev_id;
3086 unsigned long flags;
3089 if (ignore_bogus_interrupt(h))
3092 if (interrupt_not_for_us(h))
3094 spin_lock_irqsave(&h->lock, flags);
3095 while (interrupt_pending(h)) {
3096 raw_tag = get_next_completion(h);
3097 while (raw_tag != FIFO_EMPTY)
3098 raw_tag = next_command(h);
3100 spin_unlock_irqrestore(&h->lock, flags);
3104 static irqreturn_t hpsa_msix_discard_completions(int irq, void *dev_id)
3106 struct ctlr_info *h = dev_id;
3107 unsigned long flags;
3110 if (ignore_bogus_interrupt(h))
3113 spin_lock_irqsave(&h->lock, flags);
3114 raw_tag = get_next_completion(h);
3115 while (raw_tag != FIFO_EMPTY)
3116 raw_tag = next_command(h);
3117 spin_unlock_irqrestore(&h->lock, flags);
3121 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id)
3123 struct ctlr_info *h = dev_id;
3124 unsigned long flags;
3127 if (interrupt_not_for_us(h))
3129 spin_lock_irqsave(&h->lock, flags);
3130 while (interrupt_pending(h)) {
3131 raw_tag = get_next_completion(h);
3132 while (raw_tag != FIFO_EMPTY) {
3133 if (hpsa_tag_contains_index(raw_tag))
3134 raw_tag = process_indexed_cmd(h, raw_tag);
3136 raw_tag = process_nonindexed_cmd(h, raw_tag);
3139 spin_unlock_irqrestore(&h->lock, flags);
3143 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id)
3145 struct ctlr_info *h = dev_id;
3146 unsigned long flags;
3149 spin_lock_irqsave(&h->lock, flags);
3150 raw_tag = get_next_completion(h);
3151 while (raw_tag != FIFO_EMPTY) {
3152 if (hpsa_tag_contains_index(raw_tag))
3153 raw_tag = process_indexed_cmd(h, raw_tag);
3155 raw_tag = process_nonindexed_cmd(h, raw_tag);
3157 spin_unlock_irqrestore(&h->lock, flags);
3161 /* Send a message CDB to the firmware. Careful, this only works
3162 * in simple mode, not performant mode due to the tag lookup.
3163 * We only ever use this immediately after a controller reset.
3165 static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
3169 struct CommandListHeader CommandHeader;
3170 struct RequestBlock Request;
3171 struct ErrDescriptor ErrorDescriptor;
3173 struct Command *cmd;
3174 static const size_t cmd_sz = sizeof(*cmd) +
3175 sizeof(cmd->ErrorDescriptor);
3177 uint32_t paddr32, tag;
3178 void __iomem *vaddr;
3181 vaddr = pci_ioremap_bar(pdev, 0);
3185 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3186 * CCISS commands, so they must be allocated from the lower 4GiB of
3189 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3195 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3201 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3202 * although there's no guarantee, we assume that the address is at
3203 * least 4-byte aligned (most likely, it's page-aligned).
3207 cmd->CommandHeader.ReplyQueue = 0;
3208 cmd->CommandHeader.SGList = 0;
3209 cmd->CommandHeader.SGTotal = 0;
3210 cmd->CommandHeader.Tag.lower = paddr32;
3211 cmd->CommandHeader.Tag.upper = 0;
3212 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3214 cmd->Request.CDBLen = 16;
3215 cmd->Request.Type.Type = TYPE_MSG;
3216 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3217 cmd->Request.Type.Direction = XFER_NONE;
3218 cmd->Request.Timeout = 0; /* Don't time out */
3219 cmd->Request.CDB[0] = opcode;
3220 cmd->Request.CDB[1] = type;
3221 memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
3222 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd);
3223 cmd->ErrorDescriptor.Addr.upper = 0;
3224 cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo);
3226 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3228 for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
3229 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3230 if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr32)
3232 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
3237 /* we leak the DMA buffer here ... no choice since the controller could
3238 * still complete the command.
3240 if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
3241 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
3246 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3248 if (tag & HPSA_ERROR_BIT) {
3249 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
3254 dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
3259 #define hpsa_noop(p) hpsa_message(p, 3, 0)
3261 static int hpsa_controller_hard_reset(struct pci_dev *pdev,
3262 void * __iomem vaddr, u32 use_doorbell)
3268 /* For everything after the P600, the PCI power state method
3269 * of resetting the controller doesn't work, so we have this
3270 * other way using the doorbell register.
3272 dev_info(&pdev->dev, "using doorbell to reset controller\n");
3273 writel(use_doorbell, vaddr + SA5_DOORBELL);
3274 } else { /* Try to do it the PCI power state way */
3276 /* Quoting from the Open CISS Specification: "The Power
3277 * Management Control/Status Register (CSR) controls the power
3278 * state of the device. The normal operating state is D0,
3279 * CSR=00h. The software off state is D3, CSR=03h. To reset
3280 * the controller, place the interface device in D3 then to D0,
3281 * this causes a secondary PCI reset which will reset the
3284 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
3287 "hpsa_reset_controller: "
3288 "PCI PM not supported\n");
3291 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
3292 /* enter the D3hot power management state */
3293 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
3294 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3296 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3300 /* enter the D0 power management state */
3301 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3303 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
3306 * The P600 requires a small delay when changing states.
3307 * Otherwise we may think the board did not reset and we bail.
3308 * This for kdump only and is particular to the P600.
3315 static __devinit void init_driver_version(char *driver_version, int len)
3317 memset(driver_version, 0, len);
3318 strncpy(driver_version, "hpsa " HPSA_DRIVER_VERSION, len - 1);
3321 static __devinit int write_driver_ver_to_cfgtable(
3322 struct CfgTable __iomem *cfgtable)
3324 char *driver_version;
3325 int i, size = sizeof(cfgtable->driver_version);
3327 driver_version = kmalloc(size, GFP_KERNEL);
3328 if (!driver_version)
3331 init_driver_version(driver_version, size);
3332 for (i = 0; i < size; i++)
3333 writeb(driver_version[i], &cfgtable->driver_version[i]);
3334 kfree(driver_version);
3338 static __devinit void read_driver_ver_from_cfgtable(
3339 struct CfgTable __iomem *cfgtable, unsigned char *driver_ver)
3343 for (i = 0; i < sizeof(cfgtable->driver_version); i++)
3344 driver_ver[i] = readb(&cfgtable->driver_version[i]);
3347 static __devinit int controller_reset_failed(
3348 struct CfgTable __iomem *cfgtable)
3351 char *driver_ver, *old_driver_ver;
3352 int rc, size = sizeof(cfgtable->driver_version);
3354 old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
3355 if (!old_driver_ver)
3357 driver_ver = old_driver_ver + size;
3359 /* After a reset, the 32 bytes of "driver version" in the cfgtable
3360 * should have been changed, otherwise we know the reset failed.
3362 init_driver_version(old_driver_ver, size);
3363 read_driver_ver_from_cfgtable(cfgtable, driver_ver);
3364 rc = !memcmp(driver_ver, old_driver_ver, size);
3365 kfree(old_driver_ver);
3368 /* This does a hard reset of the controller using PCI power management
3369 * states or the using the doorbell register.
3371 static __devinit int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
3375 u64 cfg_base_addr_index;
3376 void __iomem *vaddr;
3377 unsigned long paddr;
3378 u32 misc_fw_support;
3380 struct CfgTable __iomem *cfgtable;
3383 u16 command_register;
3385 /* For controllers as old as the P600, this is very nearly
3388 * pci_save_state(pci_dev);
3389 * pci_set_power_state(pci_dev, PCI_D3hot);
3390 * pci_set_power_state(pci_dev, PCI_D0);
3391 * pci_restore_state(pci_dev);
3393 * For controllers newer than the P600, the pci power state
3394 * method of resetting doesn't work so we have another way
3395 * using the doorbell register.
3398 rc = hpsa_lookup_board_id(pdev, &board_id);
3399 if (rc < 0 || !ctlr_is_resettable(board_id)) {
3400 dev_warn(&pdev->dev, "Not resetting device.\n");
3404 /* if controller is soft- but not hard resettable... */
3405 if (!ctlr_is_hard_resettable(board_id))
3406 return -ENOTSUPP; /* try soft reset later. */
3408 /* Save the PCI command register */
3409 pci_read_config_word(pdev, 4, &command_register);
3410 /* Turn the board off. This is so that later pci_restore_state()
3411 * won't turn the board on before the rest of config space is ready.
3413 pci_disable_device(pdev);
3414 pci_save_state(pdev);
3416 /* find the first memory BAR, so we can find the cfg table */
3417 rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
3420 vaddr = remap_pci_mem(paddr, 0x250);
3424 /* find cfgtable in order to check if reset via doorbell is supported */
3425 rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
3426 &cfg_base_addr_index, &cfg_offset);
3429 cfgtable = remap_pci_mem(pci_resource_start(pdev,
3430 cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
3435 rc = write_driver_ver_to_cfgtable(cfgtable);
3439 /* If reset via doorbell register is supported, use that.
3440 * There are two such methods. Favor the newest method.
3442 misc_fw_support = readl(&cfgtable->misc_fw_support);
3443 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
3445 use_doorbell = DOORBELL_CTLR_RESET2;
3447 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
3449 dev_warn(&pdev->dev, "Controller claims that "
3450 "'Bit 2 doorbell reset' is "
3451 "supported, but not 'bit 5 doorbell reset'. "
3452 "Firmware update is recommended.\n");
3453 rc = -ENOTSUPP; /* try soft reset */
3454 goto unmap_cfgtable;
3458 rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
3460 goto unmap_cfgtable;
3462 pci_restore_state(pdev);
3463 rc = pci_enable_device(pdev);
3465 dev_warn(&pdev->dev, "failed to enable device.\n");
3466 goto unmap_cfgtable;
3468 pci_write_config_word(pdev, 4, command_register);
3470 /* Some devices (notably the HP Smart Array 5i Controller)
3471 need a little pause here */
3472 msleep(HPSA_POST_RESET_PAUSE_MSECS);
3474 /* Wait for board to become not ready, then ready. */
3475 dev_info(&pdev->dev, "Waiting for board to reset.\n");
3476 rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
3478 dev_warn(&pdev->dev,
3479 "failed waiting for board to reset."
3480 " Will try soft reset.\n");
3481 rc = -ENOTSUPP; /* Not expected, but try soft reset later */
3482 goto unmap_cfgtable;
3484 rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
3486 dev_warn(&pdev->dev,
3487 "failed waiting for board to become ready "
3488 "after hard reset\n");
3489 goto unmap_cfgtable;
3492 rc = controller_reset_failed(vaddr);
3494 goto unmap_cfgtable;
3496 dev_warn(&pdev->dev, "Unable to successfully reset "
3497 "controller. Will try soft reset.\n");
3500 dev_info(&pdev->dev, "board ready after hard reset.\n");
3512 * We cannot read the structure directly, for portability we must use
3514 * This is for debug only.
3516 static void print_cfg_table(struct device *dev, struct CfgTable *tb)
3522 dev_info(dev, "Controller Configuration information\n");
3523 dev_info(dev, "------------------------------------\n");
3524 for (i = 0; i < 4; i++)
3525 temp_name[i] = readb(&(tb->Signature[i]));
3526 temp_name[4] = '\0';
3527 dev_info(dev, " Signature = %s\n", temp_name);
3528 dev_info(dev, " Spec Number = %d\n", readl(&(tb->SpecValence)));
3529 dev_info(dev, " Transport methods supported = 0x%x\n",
3530 readl(&(tb->TransportSupport)));
3531 dev_info(dev, " Transport methods active = 0x%x\n",
3532 readl(&(tb->TransportActive)));
3533 dev_info(dev, " Requested transport Method = 0x%x\n",
3534 readl(&(tb->HostWrite.TransportRequest)));
3535 dev_info(dev, " Coalesce Interrupt Delay = 0x%x\n",
3536 readl(&(tb->HostWrite.CoalIntDelay)));
3537 dev_info(dev, " Coalesce Interrupt Count = 0x%x\n",
3538 readl(&(tb->HostWrite.CoalIntCount)));
3539 dev_info(dev, " Max outstanding commands = 0x%d\n",
3540 readl(&(tb->CmdsOutMax)));
3541 dev_info(dev, " Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3542 for (i = 0; i < 16; i++)
3543 temp_name[i] = readb(&(tb->ServerName[i]));
3544 temp_name[16] = '\0';
3545 dev_info(dev, " Server Name = %s\n", temp_name);
3546 dev_info(dev, " Heartbeat Counter = 0x%x\n\n\n",
3547 readl(&(tb->HeartBeat)));
3548 #endif /* HPSA_DEBUG */
3551 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
3553 int i, offset, mem_type, bar_type;
3555 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
3558 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3559 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
3560 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3563 mem_type = pci_resource_flags(pdev, i) &
3564 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
3566 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3567 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3568 offset += 4; /* 32 bit */
3570 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3573 default: /* reserved in PCI 2.2 */
3574 dev_warn(&pdev->dev,
3575 "base address is invalid\n");
3580 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3586 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
3587 * controllers that are capable. If not, we use IO-APIC mode.
3590 static void __devinit hpsa_interrupt_mode(struct ctlr_info *h)
3592 #ifdef CONFIG_PCI_MSI
3594 struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1},
3598 /* Some boards advertise MSI but don't really support it */
3599 if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
3600 (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
3601 goto default_int_mode;
3602 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
3603 dev_info(&h->pdev->dev, "MSIX\n");
3604 err = pci_enable_msix(h->pdev, hpsa_msix_entries, 4);
3606 h->intr[0] = hpsa_msix_entries[0].vector;
3607 h->intr[1] = hpsa_msix_entries[1].vector;
3608 h->intr[2] = hpsa_msix_entries[2].vector;
3609 h->intr[3] = hpsa_msix_entries[3].vector;
3614 dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
3615 "available\n", err);
3616 goto default_int_mode;
3618 dev_warn(&h->pdev->dev, "MSI-X init failed %d\n",
3620 goto default_int_mode;
3623 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
3624 dev_info(&h->pdev->dev, "MSI\n");
3625 if (!pci_enable_msi(h->pdev))
3628 dev_warn(&h->pdev->dev, "MSI init failed\n");
3631 #endif /* CONFIG_PCI_MSI */
3632 /* if we get here we're going to use the default interrupt mode */
3633 h->intr[h->intr_mode] = h->pdev->irq;
3636 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
3639 u32 subsystem_vendor_id, subsystem_device_id;
3641 subsystem_vendor_id = pdev->subsystem_vendor;
3642 subsystem_device_id = pdev->subsystem_device;
3643 *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
3644 subsystem_vendor_id;
3646 for (i = 0; i < ARRAY_SIZE(products); i++)
3647 if (*board_id == products[i].board_id)
3650 if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
3651 subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
3653 dev_warn(&pdev->dev, "unrecognized board ID: "
3654 "0x%08x, ignoring.\n", *board_id);
3657 return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
3660 static inline bool hpsa_board_disabled(struct pci_dev *pdev)
3664 (void) pci_read_config_word(pdev, PCI_COMMAND, &command);
3665 return ((command & PCI_COMMAND_MEMORY) == 0);
3668 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
3669 unsigned long *memory_bar)
3673 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
3674 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
3675 /* addressing mode bits already removed */
3676 *memory_bar = pci_resource_start(pdev, i);
3677 dev_dbg(&pdev->dev, "memory BAR = %lx\n",
3681 dev_warn(&pdev->dev, "no memory BAR found\n");
3685 static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev,
3686 void __iomem *vaddr, int wait_for_ready)
3691 iterations = HPSA_BOARD_READY_ITERATIONS;
3693 iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
3695 for (i = 0; i < iterations; i++) {
3696 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
3697 if (wait_for_ready) {
3698 if (scratchpad == HPSA_FIRMWARE_READY)
3701 if (scratchpad != HPSA_FIRMWARE_READY)
3704 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
3706 dev_warn(&pdev->dev, "board not ready, timed out.\n");
3710 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev,
3711 void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
3714 *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
3715 *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
3716 *cfg_base_addr &= (u32) 0x0000ffff;
3717 *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
3718 if (*cfg_base_addr_index == -1) {
3719 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
3725 static int __devinit hpsa_find_cfgtables(struct ctlr_info *h)
3729 u64 cfg_base_addr_index;
3733 rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
3734 &cfg_base_addr_index, &cfg_offset);
3737 h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
3738 cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
3741 rc = write_driver_ver_to_cfgtable(h->cfgtable);
3744 /* Find performant mode table. */
3745 trans_offset = readl(&h->cfgtable->TransMethodOffset);
3746 h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
3747 cfg_base_addr_index)+cfg_offset+trans_offset,
3748 sizeof(*h->transtable));
3754 static void __devinit hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
3756 h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
3758 /* Limit commands in memory limited kdump scenario. */
3759 if (reset_devices && h->max_commands > 32)
3760 h->max_commands = 32;
3762 if (h->max_commands < 16) {
3763 dev_warn(&h->pdev->dev, "Controller reports "
3764 "max supported commands of %d, an obvious lie. "
3765 "Using 16. Ensure that firmware is up to date.\n",
3767 h->max_commands = 16;
3771 /* Interrogate the hardware for some limits:
3772 * max commands, max SG elements without chaining, and with chaining,
3773 * SG chain block size, etc.
3775 static void __devinit hpsa_find_board_params(struct ctlr_info *h)
3777 hpsa_get_max_perf_mode_cmds(h);
3778 h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
3779 h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
3781 * Limit in-command s/g elements to 32 save dma'able memory.
3782 * Howvever spec says if 0, use 31
3784 h->max_cmd_sg_entries = 31;
3785 if (h->maxsgentries > 512) {
3786 h->max_cmd_sg_entries = 32;
3787 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
3788 h->maxsgentries--; /* save one for chain pointer */
3790 h->maxsgentries = 31; /* default to traditional values */
3795 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
3797 if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
3798 (readb(&h->cfgtable->Signature[1]) != 'I') ||
3799 (readb(&h->cfgtable->Signature[2]) != 'S') ||
3800 (readb(&h->cfgtable->Signature[3]) != 'S')) {
3801 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
3807 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3808 static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
3813 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
3815 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
3819 /* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result
3820 * in a prefetch beyond physical memory.
3822 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
3826 if (h->board_id != 0x3225103C)
3828 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
3829 dma_prefetch |= 0x8000;
3830 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
3833 static void __devinit hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
3837 unsigned long flags;
3839 /* under certain very rare conditions, this can take awhile.
3840 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3841 * as we enter this code.)
3843 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3844 spin_lock_irqsave(&h->lock, flags);
3845 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
3846 spin_unlock_irqrestore(&h->lock, flags);
3847 if (!(doorbell_value & CFGTBL_ChangeReq))
3849 /* delay and try again */
3850 usleep_range(10000, 20000);
3854 static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h)
3858 trans_support = readl(&(h->cfgtable->TransportSupport));
3859 if (!(trans_support & SIMPLE_MODE))
3862 h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
3863 /* Update the field, and then ring the doorbell */
3864 writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
3865 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
3866 hpsa_wait_for_mode_change_ack(h);
3867 print_cfg_table(&h->pdev->dev, h->cfgtable);
3868 if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
3869 dev_warn(&h->pdev->dev,
3870 "unable to get board into simple mode\n");
3873 h->transMethod = CFGTBL_Trans_Simple;
3877 static int __devinit hpsa_pci_init(struct ctlr_info *h)
3879 int prod_index, err;
3881 prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
3884 h->product_name = products[prod_index].product_name;
3885 h->access = *(products[prod_index].access);
3887 if (hpsa_board_disabled(h->pdev)) {
3888 dev_warn(&h->pdev->dev, "controller appears to be disabled\n");
3892 pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
3893 PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
3895 err = pci_enable_device(h->pdev);
3897 dev_warn(&h->pdev->dev, "unable to enable PCI device\n");
3901 err = pci_request_regions(h->pdev, "hpsa");
3903 dev_err(&h->pdev->dev,
3904 "cannot obtain PCI resources, aborting\n");
3907 hpsa_interrupt_mode(h);
3908 err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
3910 goto err_out_free_res;
3911 h->vaddr = remap_pci_mem(h->paddr, 0x250);
3914 goto err_out_free_res;
3916 err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
3918 goto err_out_free_res;
3919 err = hpsa_find_cfgtables(h);
3921 goto err_out_free_res;
3922 hpsa_find_board_params(h);
3924 if (!hpsa_CISS_signature_present(h)) {
3926 goto err_out_free_res;
3928 hpsa_enable_scsi_prefetch(h);
3929 hpsa_p600_dma_prefetch_quirk(h);
3930 err = hpsa_enter_simple_mode(h);
3932 goto err_out_free_res;
3937 iounmap(h->transtable);
3939 iounmap(h->cfgtable);
3943 * Deliberately omit pci_disable_device(): it does something nasty to
3944 * Smart Array controllers that pci_enable_device does not undo
3946 pci_release_regions(h->pdev);
3950 static void __devinit hpsa_hba_inquiry(struct ctlr_info *h)
3954 #define HBA_INQUIRY_BYTE_COUNT 64
3955 h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
3956 if (!h->hba_inquiry_data)
3958 rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
3959 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
3961 kfree(h->hba_inquiry_data);
3962 h->hba_inquiry_data = NULL;
3966 static __devinit int hpsa_init_reset_devices(struct pci_dev *pdev)
3973 /* Reset the controller with a PCI power-cycle or via doorbell */
3974 rc = hpsa_kdump_hard_reset_controller(pdev);
3976 /* -ENOTSUPP here means we cannot reset the controller
3977 * but it's already (and still) up and running in
3978 * "performant mode". Or, it might be 640x, which can't reset
3979 * due to concerns about shared bbwc between 6402/6404 pair.
3981 if (rc == -ENOTSUPP)
3982 return rc; /* just try to do the kdump anyhow. */
3986 /* Now try to get the controller to respond to a no-op */
3987 dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
3988 for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
3989 if (hpsa_noop(pdev) == 0)
3992 dev_warn(&pdev->dev, "no-op failed%s\n",
3993 (i < 11 ? "; re-trying" : ""));
3998 static __devinit int hpsa_allocate_cmd_pool(struct ctlr_info *h)
4000 h->cmd_pool_bits = kzalloc(
4001 DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
4002 sizeof(unsigned long), GFP_KERNEL);
4003 h->cmd_pool = pci_alloc_consistent(h->pdev,
4004 h->nr_cmds * sizeof(*h->cmd_pool),
4005 &(h->cmd_pool_dhandle));
4006 h->errinfo_pool = pci_alloc_consistent(h->pdev,
4007 h->nr_cmds * sizeof(*h->errinfo_pool),
4008 &(h->errinfo_pool_dhandle));
4009 if ((h->cmd_pool_bits == NULL)
4010 || (h->cmd_pool == NULL)
4011 || (h->errinfo_pool == NULL)) {
4012 dev_err(&h->pdev->dev, "out of memory in %s", __func__);
4018 static void hpsa_free_cmd_pool(struct ctlr_info *h)
4020 kfree(h->cmd_pool_bits);
4022 pci_free_consistent(h->pdev,
4023 h->nr_cmds * sizeof(struct CommandList),
4024 h->cmd_pool, h->cmd_pool_dhandle);
4025 if (h->errinfo_pool)
4026 pci_free_consistent(h->pdev,
4027 h->nr_cmds * sizeof(struct ErrorInfo),
4029 h->errinfo_pool_dhandle);
4032 static int hpsa_request_irq(struct ctlr_info *h,
4033 irqreturn_t (*msixhandler)(int, void *),
4034 irqreturn_t (*intxhandler)(int, void *))
4038 if (h->msix_vector || h->msi_vector)
4039 rc = request_irq(h->intr[h->intr_mode], msixhandler,
4042 rc = request_irq(h->intr[h->intr_mode], intxhandler,
4043 IRQF_SHARED, h->devname, h);
4045 dev_err(&h->pdev->dev, "unable to get irq %d for %s\n",
4046 h->intr[h->intr_mode], h->devname);
4052 static int __devinit hpsa_kdump_soft_reset(struct ctlr_info *h)
4054 if (hpsa_send_host_reset(h, RAID_CTLR_LUNID,
4055 HPSA_RESET_TYPE_CONTROLLER)) {
4056 dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
4060 dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
4061 if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
4062 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
4066 dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
4067 if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
4068 dev_warn(&h->pdev->dev, "Board failed to become ready "
4069 "after soft reset.\n");
4076 static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
4078 free_irq(h->intr[h->intr_mode], h);
4079 #ifdef CONFIG_PCI_MSI
4081 pci_disable_msix(h->pdev);
4082 else if (h->msi_vector)
4083 pci_disable_msi(h->pdev);
4084 #endif /* CONFIG_PCI_MSI */
4085 hpsa_free_sg_chain_blocks(h);
4086 hpsa_free_cmd_pool(h);
4087 kfree(h->blockFetchTable);
4088 pci_free_consistent(h->pdev, h->reply_pool_size,
4089 h->reply_pool, h->reply_pool_dhandle);
4093 iounmap(h->transtable);
4095 iounmap(h->cfgtable);
4096 pci_release_regions(h->pdev);
4100 static int __devinit hpsa_init_one(struct pci_dev *pdev,
4101 const struct pci_device_id *ent)
4104 struct ctlr_info *h;
4105 int try_soft_reset = 0;
4106 unsigned long flags;
4108 if (number_of_controllers == 0)
4109 printk(KERN_INFO DRIVER_NAME "\n");
4111 rc = hpsa_init_reset_devices(pdev);
4113 if (rc != -ENOTSUPP)
4115 /* If the reset fails in a particular way (it has no way to do
4116 * a proper hard reset, so returns -ENOTSUPP) we can try to do
4117 * a soft reset once we get the controller configured up to the
4118 * point that it can accept a command.
4124 reinit_after_soft_reset:
4126 /* Command structures must be aligned on a 32-byte boundary because
4127 * the 5 lower bits of the address are used by the hardware. and by
4128 * the driver. See comments in hpsa.h for more info.
4130 #define COMMANDLIST_ALIGNMENT 32
4131 BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
4132 h = kzalloc(sizeof(*h), GFP_KERNEL);
4137 h->busy_initializing = 1;
4138 h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
4139 INIT_LIST_HEAD(&h->cmpQ);
4140 INIT_LIST_HEAD(&h->reqQ);
4141 spin_lock_init(&h->lock);
4142 spin_lock_init(&h->scan_lock);
4143 rc = hpsa_pci_init(h);
4147 sprintf(h->devname, "hpsa%d", number_of_controllers);
4148 h->ctlr = number_of_controllers;
4149 number_of_controllers++;
4151 /* configure PCI DMA stuff */
4152 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4156 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4160 dev_err(&pdev->dev, "no suitable DMA available\n");
4165 /* make sure the board interrupts are off */
4166 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4168 if (hpsa_request_irq(h, do_hpsa_intr_msi, do_hpsa_intr_intx))
4170 dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
4171 h->devname, pdev->device,
4172 h->intr[h->intr_mode], dac ? "" : " not");
4173 if (hpsa_allocate_cmd_pool(h))
4175 if (hpsa_allocate_sg_chain_blocks(h))
4177 init_waitqueue_head(&h->scan_wait_queue);
4178 h->scan_finished = 1; /* no scan currently in progress */
4180 pci_set_drvdata(pdev, h);
4182 h->scsi_host = NULL;
4183 spin_lock_init(&h->devlock);
4184 hpsa_put_ctlr_into_performant_mode(h);
4186 /* At this point, the controller is ready to take commands.
4187 * Now, if reset_devices and the hard reset didn't work, try
4188 * the soft reset and see if that works.
4190 if (try_soft_reset) {
4192 /* This is kind of gross. We may or may not get a completion
4193 * from the soft reset command, and if we do, then the value
4194 * from the fifo may or may not be valid. So, we wait 10 secs
4195 * after the reset throwing away any completions we get during
4196 * that time. Unregister the interrupt handler and register
4197 * fake ones to scoop up any residual completions.
4199 spin_lock_irqsave(&h->lock, flags);
4200 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4201 spin_unlock_irqrestore(&h->lock, flags);
4202 free_irq(h->intr[h->intr_mode], h);
4203 rc = hpsa_request_irq(h, hpsa_msix_discard_completions,
4204 hpsa_intx_discard_completions);
4206 dev_warn(&h->pdev->dev, "Failed to request_irq after "
4211 rc = hpsa_kdump_soft_reset(h);
4213 /* Neither hard nor soft reset worked, we're hosed. */
4216 dev_info(&h->pdev->dev, "Board READY.\n");
4217 dev_info(&h->pdev->dev,
4218 "Waiting for stale completions to drain.\n");
4219 h->access.set_intr_mask(h, HPSA_INTR_ON);
4221 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4223 rc = controller_reset_failed(h->cfgtable);
4225 dev_info(&h->pdev->dev,
4226 "Soft reset appears to have failed.\n");
4228 /* since the controller's reset, we have to go back and re-init
4229 * everything. Easiest to just forget what we've done and do it
4232 hpsa_undo_allocations_after_kdump_soft_reset(h);
4235 /* don't go to clean4, we already unallocated */
4238 goto reinit_after_soft_reset;
4241 /* Turn the interrupts on so we can service requests */
4242 h->access.set_intr_mask(h, HPSA_INTR_ON);
4244 hpsa_hba_inquiry(h);
4245 hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */
4246 h->busy_initializing = 0;
4250 hpsa_free_sg_chain_blocks(h);
4251 hpsa_free_cmd_pool(h);
4252 free_irq(h->intr[h->intr_mode], h);
4255 h->busy_initializing = 0;
4260 static void hpsa_flush_cache(struct ctlr_info *h)
4263 struct CommandList *c;
4265 flush_buf = kzalloc(4, GFP_KERNEL);
4269 c = cmd_special_alloc(h);
4271 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
4274 fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
4275 RAID_CTLR_LUNID, TYPE_CMD);
4276 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE);
4277 if (c->err_info->CommandStatus != 0)
4278 dev_warn(&h->pdev->dev,
4279 "error flushing cache on controller\n");
4280 cmd_special_free(h, c);
4285 static void hpsa_shutdown(struct pci_dev *pdev)
4287 struct ctlr_info *h;
4289 h = pci_get_drvdata(pdev);
4290 /* Turn board interrupts off and send the flush cache command
4291 * sendcmd will turn off interrupt, and send the flush...
4292 * To write all data in the battery backed cache to disks
4294 hpsa_flush_cache(h);
4295 h->access.set_intr_mask(h, HPSA_INTR_OFF);
4296 free_irq(h->intr[h->intr_mode], h);
4297 #ifdef CONFIG_PCI_MSI
4299 pci_disable_msix(h->pdev);
4300 else if (h->msi_vector)
4301 pci_disable_msi(h->pdev);
4302 #endif /* CONFIG_PCI_MSI */
4305 static void __devexit hpsa_remove_one(struct pci_dev *pdev)
4307 struct ctlr_info *h;
4309 if (pci_get_drvdata(pdev) == NULL) {
4310 dev_err(&pdev->dev, "unable to remove device \n");
4313 h = pci_get_drvdata(pdev);
4314 hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */
4315 hpsa_shutdown(pdev);
4317 iounmap(h->transtable);
4318 iounmap(h->cfgtable);
4319 hpsa_free_sg_chain_blocks(h);
4320 pci_free_consistent(h->pdev,
4321 h->nr_cmds * sizeof(struct CommandList),
4322 h->cmd_pool, h->cmd_pool_dhandle);
4323 pci_free_consistent(h->pdev,
4324 h->nr_cmds * sizeof(struct ErrorInfo),
4325 h->errinfo_pool, h->errinfo_pool_dhandle);
4326 pci_free_consistent(h->pdev, h->reply_pool_size,
4327 h->reply_pool, h->reply_pool_dhandle);
4328 kfree(h->cmd_pool_bits);
4329 kfree(h->blockFetchTable);
4330 kfree(h->hba_inquiry_data);
4332 * Deliberately omit pci_disable_device(): it does something nasty to
4333 * Smart Array controllers that pci_enable_device does not undo
4335 pci_release_regions(pdev);
4336 pci_set_drvdata(pdev, NULL);
4340 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
4341 __attribute__((unused)) pm_message_t state)
4346 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
4351 static struct pci_driver hpsa_pci_driver = {
4353 .probe = hpsa_init_one,
4354 .remove = __devexit_p(hpsa_remove_one),
4355 .id_table = hpsa_pci_device_id, /* id_table */
4356 .shutdown = hpsa_shutdown,
4357 .suspend = hpsa_suspend,
4358 .resume = hpsa_resume,
4361 /* Fill in bucket_map[], given nsgs (the max number of
4362 * scatter gather elements supported) and bucket[],
4363 * which is an array of 8 integers. The bucket[] array
4364 * contains 8 different DMA transfer sizes (in 16
4365 * byte increments) which the controller uses to fetch
4366 * commands. This function fills in bucket_map[], which
4367 * maps a given number of scatter gather elements to one of
4368 * the 8 DMA transfer sizes. The point of it is to allow the
4369 * controller to only do as much DMA as needed to fetch the
4370 * command, with the DMA transfer size encoded in the lower
4371 * bits of the command address.
4373 static void calc_bucket_map(int bucket[], int num_buckets,
4374 int nsgs, int *bucket_map)
4378 /* even a command with 0 SGs requires 4 blocks */
4379 #define MINIMUM_TRANSFER_BLOCKS 4
4380 #define NUM_BUCKETS 8
4381 /* Note, bucket_map must have nsgs+1 entries. */
4382 for (i = 0; i <= nsgs; i++) {
4383 /* Compute size of a command with i SG entries */
4384 size = i + MINIMUM_TRANSFER_BLOCKS;
4385 b = num_buckets; /* Assume the biggest bucket */
4386 /* Find the bucket that is just big enough */
4387 for (j = 0; j < 8; j++) {
4388 if (bucket[j] >= size) {
4393 /* for a command with i SG entries, use bucket b. */
4398 static __devinit void hpsa_enter_performant_mode(struct ctlr_info *h,
4402 unsigned long register_value;
4404 /* This is a bit complicated. There are 8 registers on
4405 * the controller which we write to to tell it 8 different
4406 * sizes of commands which there may be. It's a way of
4407 * reducing the DMA done to fetch each command. Encoded into
4408 * each command's tag are 3 bits which communicate to the controller
4409 * which of the eight sizes that command fits within. The size of
4410 * each command depends on how many scatter gather entries there are.
4411 * Each SG entry requires 16 bytes. The eight registers are programmed
4412 * with the number of 16-byte blocks a command of that size requires.
4413 * The smallest command possible requires 5 such 16 byte blocks.
4414 * the largest command possible requires MAXSGENTRIES + 4 16-byte
4415 * blocks. Note, this only extends to the SG entries contained
4416 * within the command block, and does not extend to chained blocks
4417 * of SG elements. bft[] contains the eight values we write to
4418 * the registers. They are not evenly distributed, but have more
4419 * sizes for small commands, and fewer sizes for larger commands.
4421 int bft[8] = {5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
4422 BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
4423 /* 5 = 1 s/g entry or 4k
4424 * 6 = 2 s/g entry or 8k
4425 * 8 = 4 s/g entry or 16k
4426 * 10 = 6 s/g entry or 24k
4429 h->reply_pool_wraparound = 1; /* spec: init to 1 */
4431 /* Controller spec: zero out this buffer. */
4432 memset(h->reply_pool, 0, h->reply_pool_size);
4433 h->reply_pool_head = h->reply_pool;
4435 bft[7] = h->max_sg_entries + 4;
4436 calc_bucket_map(bft, ARRAY_SIZE(bft), 32, h->blockFetchTable);
4437 for (i = 0; i < 8; i++)
4438 writel(bft[i], &h->transtable->BlockFetch[i]);
4440 /* size of controller ring buffer */
4441 writel(h->max_commands, &h->transtable->RepQSize);
4442 writel(1, &h->transtable->RepQCount);
4443 writel(0, &h->transtable->RepQCtrAddrLow32);
4444 writel(0, &h->transtable->RepQCtrAddrHigh32);
4445 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
4446 writel(0, &h->transtable->RepQAddr0High32);
4447 writel(CFGTBL_Trans_Performant | use_short_tags,
4448 &(h->cfgtable->HostWrite.TransportRequest));
4449 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
4450 hpsa_wait_for_mode_change_ack(h);
4451 register_value = readl(&(h->cfgtable->TransportActive));
4452 if (!(register_value & CFGTBL_Trans_Performant)) {
4453 dev_warn(&h->pdev->dev, "unable to get board into"
4454 " performant mode\n");
4457 /* Change the access methods to the performant access methods */
4458 h->access = SA5_performant_access;
4459 h->transMethod = CFGTBL_Trans_Performant;
4462 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
4466 if (hpsa_simple_mode)
4469 trans_support = readl(&(h->cfgtable->TransportSupport));
4470 if (!(trans_support & PERFORMANT_MODE))
4473 hpsa_get_max_perf_mode_cmds(h);
4474 h->max_sg_entries = 32;
4475 /* Performant mode ring buffer and supporting data structures */
4476 h->reply_pool_size = h->max_commands * sizeof(u64);
4477 h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size,
4478 &(h->reply_pool_dhandle));
4480 /* Need a block fetch table for performant mode */
4481 h->blockFetchTable = kmalloc(((h->max_sg_entries+1) *
4482 sizeof(u32)), GFP_KERNEL);
4484 if ((h->reply_pool == NULL)
4485 || (h->blockFetchTable == NULL))
4488 hpsa_enter_performant_mode(h,
4489 trans_support & CFGTBL_Trans_use_short_tags);
4495 pci_free_consistent(h->pdev, h->reply_pool_size,
4496 h->reply_pool, h->reply_pool_dhandle);
4497 kfree(h->blockFetchTable);
4501 * This is it. Register the PCI driver information for the cards we control
4502 * the OS will call our registered routines when it finds one of our cards.
4504 static int __init hpsa_init(void)
4506 return pci_register_driver(&hpsa_pci_driver);
4509 static void __exit hpsa_cleanup(void)
4511 pci_unregister_driver(&hpsa_pci_driver);
4514 module_init(hpsa_init);
4515 module_exit(hpsa_cleanup);