1 /* 2 * Disk Array driver for HP Smart Array SAS controllers 3 * Copyright 2000, 2009 Hewlett-Packard Development Company, L.P. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 12 * NON INFRINGEMENT. See the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 * 18 * Questions/Comments/Bugfixes to iss_storagedev@hp.com 19 * 20 */ 21 22 #include <linux/module.h> 23 #include <linux/interrupt.h> 24 #include <linux/types.h> 25 #include <linux/pci.h> 26 #include <linux/kernel.h> 27 #include <linux/slab.h> 28 #include <linux/delay.h> 29 #include <linux/fs.h> 30 #include <linux/timer.h> 31 #include <linux/seq_file.h> 32 #include <linux/init.h> 33 #include <linux/spinlock.h> 34 #include <linux/smp_lock.h> 35 #include <linux/compat.h> 36 #include <linux/blktrace_api.h> 37 #include <linux/uaccess.h> 38 #include <linux/io.h> 39 #include <linux/dma-mapping.h> 40 #include <linux/completion.h> 41 #include <linux/moduleparam.h> 42 #include <scsi/scsi.h> 43 #include <scsi/scsi_cmnd.h> 44 #include <scsi/scsi_device.h> 45 #include <scsi/scsi_host.h> 46 #include <scsi/scsi_tcq.h> 47 #include <linux/cciss_ioctl.h> 48 #include <linux/string.h> 49 #include <linux/bitmap.h> 50 #include <asm/atomic.h> 51 #include <linux/kthread.h> 52 #include "hpsa_cmd.h" 53 #include "hpsa.h" 54 55 /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */ 56 #define HPSA_DRIVER_VERSION "2.0.2-1" 57 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")" 58 59 /* How long to wait (in milliseconds) for board to go into simple mode */ 60 #define MAX_CONFIG_WAIT 30000 61 #define MAX_IOCTL_CONFIG_WAIT 1000 62 63 /*define how many times we will try a command because of bus resets */ 64 #define MAX_CMD_RETRIES 3 65 66 /* Embedded module documentation macros - see modules.h */ 67 MODULE_AUTHOR("Hewlett-Packard Company"); 68 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \ 69 HPSA_DRIVER_VERSION); 70 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers"); 71 MODULE_VERSION(HPSA_DRIVER_VERSION); 72 MODULE_LICENSE("GPL"); 73 74 static int hpsa_allow_any; 75 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR); 76 MODULE_PARM_DESC(hpsa_allow_any, 77 "Allow hpsa driver to access unknown HP Smart Array hardware"); 78 79 /* define the PCI info for the cards we can control */ 80 static const struct pci_device_id hpsa_pci_device_id[] = { 81 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241}, 82 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243}, 83 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245}, 84 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247}, 85 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249}, 86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324a}, 87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324b}, 88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3233}, 89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3250}, 90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3251}, 91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3252}, 92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3253}, 93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3254}, 94 #define PCI_DEVICE_ID_HP_CISSF 0x333f 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x333F}, 96 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 97 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0}, 98 {PCI_VENDOR_ID_COMPAQ, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 99 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0}, 100 {0,} 101 }; 102 103 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id); 104 105 /* board_id = Subsystem Device ID & Vendor ID 106 * product = Marketing Name for the board 107 * access = Address of the struct of function pointers 108 */ 109 static struct board_type products[] = { 110 {0x3241103C, "Smart Array P212", &SA5_access}, 111 {0x3243103C, "Smart Array P410", &SA5_access}, 112 {0x3245103C, "Smart Array P410i", &SA5_access}, 113 {0x3247103C, "Smart Array P411", &SA5_access}, 114 {0x3249103C, "Smart Array P812", &SA5_access}, 115 {0x324a103C, "Smart Array P712m", &SA5_access}, 116 {0x324b103C, "Smart Array P711m", &SA5_access}, 117 {0x3233103C, "StorageWorks P1210m", &SA5_access}, 118 {0x333F103C, "StorageWorks P1210m", &SA5_access}, 119 {0x3250103C, "Smart Array", &SA5_access}, 120 {0x3250113C, "Smart Array", &SA5_access}, 121 {0x3250123C, "Smart Array", &SA5_access}, 122 {0x3250133C, "Smart Array", &SA5_access}, 123 {0x3250143C, "Smart Array", &SA5_access}, 124 {0xFFFF103C, "Unknown Smart Array", &SA5_access}, 125 }; 126 127 static int number_of_controllers; 128 129 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id); 130 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id); 131 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg); 132 static void start_io(struct ctlr_info *h); 133 134 #ifdef CONFIG_COMPAT 135 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg); 136 #endif 137 138 static void cmd_free(struct ctlr_info *h, struct CommandList *c); 139 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c); 140 static struct CommandList *cmd_alloc(struct ctlr_info *h); 141 static struct CommandList *cmd_special_alloc(struct ctlr_info *h); 142 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h, 143 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr, 144 int cmd_type); 145 146 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd, 147 void (*done)(struct scsi_cmnd *)); 148 static void hpsa_scan_start(struct Scsi_Host *); 149 static int hpsa_scan_finished(struct Scsi_Host *sh, 150 unsigned long elapsed_time); 151 static int hpsa_change_queue_depth(struct scsi_device *sdev, 152 int qdepth, int reason); 153 154 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd); 155 static int hpsa_slave_alloc(struct scsi_device *sdev); 156 static void hpsa_slave_destroy(struct scsi_device *sdev); 157 158 static ssize_t raid_level_show(struct device *dev, 159 struct device_attribute *attr, char *buf); 160 static ssize_t lunid_show(struct device *dev, 161 struct device_attribute *attr, char *buf); 162 static ssize_t unique_id_show(struct device *dev, 163 struct device_attribute *attr, char *buf); 164 static ssize_t host_show_firmware_revision(struct device *dev, 165 struct device_attribute *attr, char *buf); 166 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno); 167 static ssize_t host_store_rescan(struct device *dev, 168 struct device_attribute *attr, const char *buf, size_t count); 169 static int check_for_unit_attention(struct ctlr_info *h, 170 struct CommandList *c); 171 static void check_ioctl_unit_attention(struct ctlr_info *h, 172 struct CommandList *c); 173 /* performant mode helper functions */ 174 static void calc_bucket_map(int *bucket, int num_buckets, 175 int nsgs, int *bucket_map); 176 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h); 177 static inline u32 next_command(struct ctlr_info *h); 178 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev, 179 void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index, 180 u64 *cfg_offset); 181 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev, 182 unsigned long *memory_bar); 183 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id); 184 185 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL); 186 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL); 187 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL); 188 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); 189 static DEVICE_ATTR(firmware_revision, S_IRUGO, 190 host_show_firmware_revision, NULL); 191 192 static struct device_attribute *hpsa_sdev_attrs[] = { 193 &dev_attr_raid_level, 194 &dev_attr_lunid, 195 &dev_attr_unique_id, 196 NULL, 197 }; 198 199 static struct device_attribute *hpsa_shost_attrs[] = { 200 &dev_attr_rescan, 201 &dev_attr_firmware_revision, 202 NULL, 203 }; 204 205 static struct scsi_host_template hpsa_driver_template = { 206 .module = THIS_MODULE, 207 .name = "hpsa", 208 .proc_name = "hpsa", 209 .queuecommand = hpsa_scsi_queue_command, 210 .scan_start = hpsa_scan_start, 211 .scan_finished = hpsa_scan_finished, 212 .change_queue_depth = hpsa_change_queue_depth, 213 .this_id = -1, 214 .use_clustering = ENABLE_CLUSTERING, 215 .eh_device_reset_handler = hpsa_eh_device_reset_handler, 216 .ioctl = hpsa_ioctl, 217 .slave_alloc = hpsa_slave_alloc, 218 .slave_destroy = hpsa_slave_destroy, 219 #ifdef CONFIG_COMPAT 220 .compat_ioctl = hpsa_compat_ioctl, 221 #endif 222 .sdev_attrs = hpsa_sdev_attrs, 223 .shost_attrs = hpsa_shost_attrs, 224 }; 225 226 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev) 227 { 228 unsigned long *priv = shost_priv(sdev->host); 229 return (struct ctlr_info *) *priv; 230 } 231 232 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh) 233 { 234 unsigned long *priv = shost_priv(sh); 235 return (struct ctlr_info *) *priv; 236 } 237 238 static int check_for_unit_attention(struct ctlr_info *h, 239 struct CommandList *c) 240 { 241 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) 242 return 0; 243 244 switch (c->err_info->SenseInfo[12]) { 245 case STATE_CHANGED: 246 dev_warn(&h->pdev->dev, "hpsa%d: a state change " 247 "detected, command retried\n", h->ctlr); 248 break; 249 case LUN_FAILED: 250 dev_warn(&h->pdev->dev, "hpsa%d: LUN failure " 251 "detected, action required\n", h->ctlr); 252 break; 253 case REPORT_LUNS_CHANGED: 254 dev_warn(&h->pdev->dev, "hpsa%d: report LUN data " 255 "changed, action required\n", h->ctlr); 256 /* 257 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012. 258 */ 259 break; 260 case POWER_OR_RESET: 261 dev_warn(&h->pdev->dev, "hpsa%d: a power on " 262 "or device reset detected\n", h->ctlr); 263 break; 264 case UNIT_ATTENTION_CLEARED: 265 dev_warn(&h->pdev->dev, "hpsa%d: unit attention " 266 "cleared by another initiator\n", h->ctlr); 267 break; 268 default: 269 dev_warn(&h->pdev->dev, "hpsa%d: unknown " 270 "unit attention detected\n", h->ctlr); 271 break; 272 } 273 return 1; 274 } 275 276 static ssize_t host_store_rescan(struct device *dev, 277 struct device_attribute *attr, 278 const char *buf, size_t count) 279 { 280 struct ctlr_info *h; 281 struct Scsi_Host *shost = class_to_shost(dev); 282 h = shost_to_hba(shost); 283 hpsa_scan_start(h->scsi_host); 284 return count; 285 } 286 287 static ssize_t host_show_firmware_revision(struct device *dev, 288 struct device_attribute *attr, char *buf) 289 { 290 struct ctlr_info *h; 291 struct Scsi_Host *shost = class_to_shost(dev); 292 unsigned char *fwrev; 293 294 h = shost_to_hba(shost); 295 if (!h->hba_inquiry_data) 296 return 0; 297 fwrev = &h->hba_inquiry_data[32]; 298 return snprintf(buf, 20, "%c%c%c%c\n", 299 fwrev[0], fwrev[1], fwrev[2], fwrev[3]); 300 } 301 302 /* Enqueuing and dequeuing functions for cmdlists. */ 303 static inline void addQ(struct hlist_head *list, struct CommandList *c) 304 { 305 hlist_add_head(&c->list, list); 306 } 307 308 static inline u32 next_command(struct ctlr_info *h) 309 { 310 u32 a; 311 312 if (unlikely(h->transMethod != CFGTBL_Trans_Performant)) 313 return h->access.command_completed(h); 314 315 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) { 316 a = *(h->reply_pool_head); /* Next cmd in ring buffer */ 317 (h->reply_pool_head)++; 318 h->commands_outstanding--; 319 } else { 320 a = FIFO_EMPTY; 321 } 322 /* Check for wraparound */ 323 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) { 324 h->reply_pool_head = h->reply_pool; 325 h->reply_pool_wraparound ^= 1; 326 } 327 return a; 328 } 329 330 /* set_performant_mode: Modify the tag for cciss performant 331 * set bit 0 for pull model, bits 3-1 for block fetch 332 * register number 333 */ 334 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c) 335 { 336 if (likely(h->transMethod == CFGTBL_Trans_Performant)) 337 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1); 338 } 339 340 static void enqueue_cmd_and_start_io(struct ctlr_info *h, 341 struct CommandList *c) 342 { 343 unsigned long flags; 344 345 set_performant_mode(h, c); 346 spin_lock_irqsave(&h->lock, flags); 347 addQ(&h->reqQ, c); 348 h->Qdepth++; 349 start_io(h); 350 spin_unlock_irqrestore(&h->lock, flags); 351 } 352 353 static inline void removeQ(struct CommandList *c) 354 { 355 if (WARN_ON(hlist_unhashed(&c->list))) 356 return; 357 hlist_del_init(&c->list); 358 } 359 360 static inline int is_hba_lunid(unsigned char scsi3addr[]) 361 { 362 return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0; 363 } 364 365 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[]) 366 { 367 return (scsi3addr[3] & 0xC0) == 0x40; 368 } 369 370 static inline int is_scsi_rev_5(struct ctlr_info *h) 371 { 372 if (!h->hba_inquiry_data) 373 return 0; 374 if ((h->hba_inquiry_data[2] & 0x07) == 5) 375 return 1; 376 return 0; 377 } 378 379 static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", 380 "UNKNOWN" 381 }; 382 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1) 383 384 static ssize_t raid_level_show(struct device *dev, 385 struct device_attribute *attr, char *buf) 386 { 387 ssize_t l = 0; 388 unsigned char rlevel; 389 struct ctlr_info *h; 390 struct scsi_device *sdev; 391 struct hpsa_scsi_dev_t *hdev; 392 unsigned long flags; 393 394 sdev = to_scsi_device(dev); 395 h = sdev_to_hba(sdev); 396 spin_lock_irqsave(&h->lock, flags); 397 hdev = sdev->hostdata; 398 if (!hdev) { 399 spin_unlock_irqrestore(&h->lock, flags); 400 return -ENODEV; 401 } 402 403 /* Is this even a logical drive? */ 404 if (!is_logical_dev_addr_mode(hdev->scsi3addr)) { 405 spin_unlock_irqrestore(&h->lock, flags); 406 l = snprintf(buf, PAGE_SIZE, "N/A\n"); 407 return l; 408 } 409 410 rlevel = hdev->raid_level; 411 spin_unlock_irqrestore(&h->lock, flags); 412 if (rlevel > RAID_UNKNOWN) 413 rlevel = RAID_UNKNOWN; 414 l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]); 415 return l; 416 } 417 418 static ssize_t lunid_show(struct device *dev, 419 struct device_attribute *attr, char *buf) 420 { 421 struct ctlr_info *h; 422 struct scsi_device *sdev; 423 struct hpsa_scsi_dev_t *hdev; 424 unsigned long flags; 425 unsigned char lunid[8]; 426 427 sdev = to_scsi_device(dev); 428 h = sdev_to_hba(sdev); 429 spin_lock_irqsave(&h->lock, flags); 430 hdev = sdev->hostdata; 431 if (!hdev) { 432 spin_unlock_irqrestore(&h->lock, flags); 433 return -ENODEV; 434 } 435 memcpy(lunid, hdev->scsi3addr, sizeof(lunid)); 436 spin_unlock_irqrestore(&h->lock, flags); 437 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 438 lunid[0], lunid[1], lunid[2], lunid[3], 439 lunid[4], lunid[5], lunid[6], lunid[7]); 440 } 441 442 static ssize_t unique_id_show(struct device *dev, 443 struct device_attribute *attr, char *buf) 444 { 445 struct ctlr_info *h; 446 struct scsi_device *sdev; 447 struct hpsa_scsi_dev_t *hdev; 448 unsigned long flags; 449 unsigned char sn[16]; 450 451 sdev = to_scsi_device(dev); 452 h = sdev_to_hba(sdev); 453 spin_lock_irqsave(&h->lock, flags); 454 hdev = sdev->hostdata; 455 if (!hdev) { 456 spin_unlock_irqrestore(&h->lock, flags); 457 return -ENODEV; 458 } 459 memcpy(sn, hdev->device_id, sizeof(sn)); 460 spin_unlock_irqrestore(&h->lock, flags); 461 return snprintf(buf, 16 * 2 + 2, 462 "%02X%02X%02X%02X%02X%02X%02X%02X" 463 "%02X%02X%02X%02X%02X%02X%02X%02X\n", 464 sn[0], sn[1], sn[2], sn[3], 465 sn[4], sn[5], sn[6], sn[7], 466 sn[8], sn[9], sn[10], sn[11], 467 sn[12], sn[13], sn[14], sn[15]); 468 } 469 470 static int hpsa_find_target_lun(struct ctlr_info *h, 471 unsigned char scsi3addr[], int bus, int *target, int *lun) 472 { 473 /* finds an unused bus, target, lun for a new physical device 474 * assumes h->devlock is held 475 */ 476 int i, found = 0; 477 DECLARE_BITMAP(lun_taken, HPSA_MAX_SCSI_DEVS_PER_HBA); 478 479 memset(&lun_taken[0], 0, HPSA_MAX_SCSI_DEVS_PER_HBA >> 3); 480 481 for (i = 0; i < h->ndevices; i++) { 482 if (h->dev[i]->bus == bus && h->dev[i]->target != -1) 483 set_bit(h->dev[i]->target, lun_taken); 484 } 485 486 for (i = 0; i < HPSA_MAX_SCSI_DEVS_PER_HBA; i++) { 487 if (!test_bit(i, lun_taken)) { 488 /* *bus = 1; */ 489 *target = i; 490 *lun = 0; 491 found = 1; 492 break; 493 } 494 } 495 return !found; 496 } 497 498 /* Add an entry into h->dev[] array. */ 499 static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno, 500 struct hpsa_scsi_dev_t *device, 501 struct hpsa_scsi_dev_t *added[], int *nadded) 502 { 503 /* assumes h->devlock is held */ 504 int n = h->ndevices; 505 int i; 506 unsigned char addr1[8], addr2[8]; 507 struct hpsa_scsi_dev_t *sd; 508 509 if (n >= HPSA_MAX_SCSI_DEVS_PER_HBA) { 510 dev_err(&h->pdev->dev, "too many devices, some will be " 511 "inaccessible.\n"); 512 return -1; 513 } 514 515 /* physical devices do not have lun or target assigned until now. */ 516 if (device->lun != -1) 517 /* Logical device, lun is already assigned. */ 518 goto lun_assigned; 519 520 /* If this device a non-zero lun of a multi-lun device 521 * byte 4 of the 8-byte LUN addr will contain the logical 522 * unit no, zero otherise. 523 */ 524 if (device->scsi3addr[4] == 0) { 525 /* This is not a non-zero lun of a multi-lun device */ 526 if (hpsa_find_target_lun(h, device->scsi3addr, 527 device->bus, &device->target, &device->lun) != 0) 528 return -1; 529 goto lun_assigned; 530 } 531 532 /* This is a non-zero lun of a multi-lun device. 533 * Search through our list and find the device which 534 * has the same 8 byte LUN address, excepting byte 4. 535 * Assign the same bus and target for this new LUN. 536 * Use the logical unit number from the firmware. 537 */ 538 memcpy(addr1, device->scsi3addr, 8); 539 addr1[4] = 0; 540 for (i = 0; i < n; i++) { 541 sd = h->dev[i]; 542 memcpy(addr2, sd->scsi3addr, 8); 543 addr2[4] = 0; 544 /* differ only in byte 4? */ 545 if (memcmp(addr1, addr2, 8) == 0) { 546 device->bus = sd->bus; 547 device->target = sd->target; 548 device->lun = device->scsi3addr[4]; 549 break; 550 } 551 } 552 if (device->lun == -1) { 553 dev_warn(&h->pdev->dev, "physical device with no LUN=0," 554 " suspect firmware bug or unsupported hardware " 555 "configuration.\n"); 556 return -1; 557 } 558 559 lun_assigned: 560 561 h->dev[n] = device; 562 h->ndevices++; 563 added[*nadded] = device; 564 (*nadded)++; 565 566 /* initially, (before registering with scsi layer) we don't 567 * know our hostno and we don't want to print anything first 568 * time anyway (the scsi layer's inquiries will show that info) 569 */ 570 /* if (hostno != -1) */ 571 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n", 572 scsi_device_type(device->devtype), hostno, 573 device->bus, device->target, device->lun); 574 return 0; 575 } 576 577 /* Replace an entry from h->dev[] array. */ 578 static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno, 579 int entry, struct hpsa_scsi_dev_t *new_entry, 580 struct hpsa_scsi_dev_t *added[], int *nadded, 581 struct hpsa_scsi_dev_t *removed[], int *nremoved) 582 { 583 /* assumes h->devlock is held */ 584 BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA); 585 removed[*nremoved] = h->dev[entry]; 586 (*nremoved)++; 587 h->dev[entry] = new_entry; 588 added[*nadded] = new_entry; 589 (*nadded)++; 590 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n", 591 scsi_device_type(new_entry->devtype), hostno, new_entry->bus, 592 new_entry->target, new_entry->lun); 593 } 594 595 /* Remove an entry from h->dev[] array. */ 596 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry, 597 struct hpsa_scsi_dev_t *removed[], int *nremoved) 598 { 599 /* assumes h->devlock is held */ 600 int i; 601 struct hpsa_scsi_dev_t *sd; 602 603 BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA); 604 605 sd = h->dev[entry]; 606 removed[*nremoved] = h->dev[entry]; 607 (*nremoved)++; 608 609 for (i = entry; i < h->ndevices-1; i++) 610 h->dev[i] = h->dev[i+1]; 611 h->ndevices--; 612 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n", 613 scsi_device_type(sd->devtype), hostno, sd->bus, sd->target, 614 sd->lun); 615 } 616 617 #define SCSI3ADDR_EQ(a, b) ( \ 618 (a)[7] == (b)[7] && \ 619 (a)[6] == (b)[6] && \ 620 (a)[5] == (b)[5] && \ 621 (a)[4] == (b)[4] && \ 622 (a)[3] == (b)[3] && \ 623 (a)[2] == (b)[2] && \ 624 (a)[1] == (b)[1] && \ 625 (a)[0] == (b)[0]) 626 627 static void fixup_botched_add(struct ctlr_info *h, 628 struct hpsa_scsi_dev_t *added) 629 { 630 /* called when scsi_add_device fails in order to re-adjust 631 * h->dev[] to match the mid layer's view. 632 */ 633 unsigned long flags; 634 int i, j; 635 636 spin_lock_irqsave(&h->lock, flags); 637 for (i = 0; i < h->ndevices; i++) { 638 if (h->dev[i] == added) { 639 for (j = i; j < h->ndevices-1; j++) 640 h->dev[j] = h->dev[j+1]; 641 h->ndevices--; 642 break; 643 } 644 } 645 spin_unlock_irqrestore(&h->lock, flags); 646 kfree(added); 647 } 648 649 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1, 650 struct hpsa_scsi_dev_t *dev2) 651 { 652 if ((is_logical_dev_addr_mode(dev1->scsi3addr) || 653 (dev1->lun != -1 && dev2->lun != -1)) && 654 dev1->devtype != 0x0C) 655 return (memcmp(dev1, dev2, sizeof(*dev1)) == 0); 656 657 /* we compare everything except lun and target as these 658 * are not yet assigned. Compare parts likely 659 * to differ first 660 */ 661 if (memcmp(dev1->scsi3addr, dev2->scsi3addr, 662 sizeof(dev1->scsi3addr)) != 0) 663 return 0; 664 if (memcmp(dev1->device_id, dev2->device_id, 665 sizeof(dev1->device_id)) != 0) 666 return 0; 667 if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0) 668 return 0; 669 if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0) 670 return 0; 671 if (memcmp(dev1->revision, dev2->revision, sizeof(dev1->revision)) != 0) 672 return 0; 673 if (dev1->devtype != dev2->devtype) 674 return 0; 675 if (dev1->raid_level != dev2->raid_level) 676 return 0; 677 if (dev1->bus != dev2->bus) 678 return 0; 679 return 1; 680 } 681 682 /* Find needle in haystack. If exact match found, return DEVICE_SAME, 683 * and return needle location in *index. If scsi3addr matches, but not 684 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle 685 * location in *index. If needle not found, return DEVICE_NOT_FOUND. 686 */ 687 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle, 688 struct hpsa_scsi_dev_t *haystack[], int haystack_size, 689 int *index) 690 { 691 int i; 692 #define DEVICE_NOT_FOUND 0 693 #define DEVICE_CHANGED 1 694 #define DEVICE_SAME 2 695 for (i = 0; i < haystack_size; i++) { 696 if (haystack[i] == NULL) /* previously removed. */ 697 continue; 698 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) { 699 *index = i; 700 if (device_is_the_same(needle, haystack[i])) 701 return DEVICE_SAME; 702 else 703 return DEVICE_CHANGED; 704 } 705 } 706 *index = -1; 707 return DEVICE_NOT_FOUND; 708 } 709 710 static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno, 711 struct hpsa_scsi_dev_t *sd[], int nsds) 712 { 713 /* sd contains scsi3 addresses and devtypes, and inquiry 714 * data. This function takes what's in sd to be the current 715 * reality and updates h->dev[] to reflect that reality. 716 */ 717 int i, entry, device_change, changes = 0; 718 struct hpsa_scsi_dev_t *csd; 719 unsigned long flags; 720 struct hpsa_scsi_dev_t **added, **removed; 721 int nadded, nremoved; 722 struct Scsi_Host *sh = NULL; 723 724 added = kzalloc(sizeof(*added) * HPSA_MAX_SCSI_DEVS_PER_HBA, 725 GFP_KERNEL); 726 removed = kzalloc(sizeof(*removed) * HPSA_MAX_SCSI_DEVS_PER_HBA, 727 GFP_KERNEL); 728 729 if (!added || !removed) { 730 dev_warn(&h->pdev->dev, "out of memory in " 731 "adjust_hpsa_scsi_table\n"); 732 goto free_and_out; 733 } 734 735 spin_lock_irqsave(&h->devlock, flags); 736 737 /* find any devices in h->dev[] that are not in 738 * sd[] and remove them from h->dev[], and for any 739 * devices which have changed, remove the old device 740 * info and add the new device info. 741 */ 742 i = 0; 743 nremoved = 0; 744 nadded = 0; 745 while (i < h->ndevices) { 746 csd = h->dev[i]; 747 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry); 748 if (device_change == DEVICE_NOT_FOUND) { 749 changes++; 750 hpsa_scsi_remove_entry(h, hostno, i, 751 removed, &nremoved); 752 continue; /* remove ^^^, hence i not incremented */ 753 } else if (device_change == DEVICE_CHANGED) { 754 changes++; 755 hpsa_scsi_replace_entry(h, hostno, i, sd[entry], 756 added, &nadded, removed, &nremoved); 757 /* Set it to NULL to prevent it from being freed 758 * at the bottom of hpsa_update_scsi_devices() 759 */ 760 sd[entry] = NULL; 761 } 762 i++; 763 } 764 765 /* Now, make sure every device listed in sd[] is also 766 * listed in h->dev[], adding them if they aren't found 767 */ 768 769 for (i = 0; i < nsds; i++) { 770 if (!sd[i]) /* if already added above. */ 771 continue; 772 device_change = hpsa_scsi_find_entry(sd[i], h->dev, 773 h->ndevices, &entry); 774 if (device_change == DEVICE_NOT_FOUND) { 775 changes++; 776 if (hpsa_scsi_add_entry(h, hostno, sd[i], 777 added, &nadded) != 0) 778 break; 779 sd[i] = NULL; /* prevent from being freed later. */ 780 } else if (device_change == DEVICE_CHANGED) { 781 /* should never happen... */ 782 changes++; 783 dev_warn(&h->pdev->dev, 784 "device unexpectedly changed.\n"); 785 /* but if it does happen, we just ignore that device */ 786 } 787 } 788 spin_unlock_irqrestore(&h->devlock, flags); 789 790 /* Don't notify scsi mid layer of any changes the first time through 791 * (or if there are no changes) scsi_scan_host will do it later the 792 * first time through. 793 */ 794 if (hostno == -1 || !changes) 795 goto free_and_out; 796 797 sh = h->scsi_host; 798 /* Notify scsi mid layer of any removed devices */ 799 for (i = 0; i < nremoved; i++) { 800 struct scsi_device *sdev = 801 scsi_device_lookup(sh, removed[i]->bus, 802 removed[i]->target, removed[i]->lun); 803 if (sdev != NULL) { 804 scsi_remove_device(sdev); 805 scsi_device_put(sdev); 806 } else { 807 /* We don't expect to get here. 808 * future cmds to this device will get selection 809 * timeout as if the device was gone. 810 */ 811 dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d " 812 " for removal.", hostno, removed[i]->bus, 813 removed[i]->target, removed[i]->lun); 814 } 815 kfree(removed[i]); 816 removed[i] = NULL; 817 } 818 819 /* Notify scsi mid layer of any added devices */ 820 for (i = 0; i < nadded; i++) { 821 if (scsi_add_device(sh, added[i]->bus, 822 added[i]->target, added[i]->lun) == 0) 823 continue; 824 dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, " 825 "device not added.\n", hostno, added[i]->bus, 826 added[i]->target, added[i]->lun); 827 /* now we have to remove it from h->dev, 828 * since it didn't get added to scsi mid layer 829 */ 830 fixup_botched_add(h, added[i]); 831 } 832 833 free_and_out: 834 kfree(added); 835 kfree(removed); 836 } 837 838 /* 839 * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t * 840 * Assume's h->devlock is held. 841 */ 842 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h, 843 int bus, int target, int lun) 844 { 845 int i; 846 struct hpsa_scsi_dev_t *sd; 847 848 for (i = 0; i < h->ndevices; i++) { 849 sd = h->dev[i]; 850 if (sd->bus == bus && sd->target == target && sd->lun == lun) 851 return sd; 852 } 853 return NULL; 854 } 855 856 /* link sdev->hostdata to our per-device structure. */ 857 static int hpsa_slave_alloc(struct scsi_device *sdev) 858 { 859 struct hpsa_scsi_dev_t *sd; 860 unsigned long flags; 861 struct ctlr_info *h; 862 863 h = sdev_to_hba(sdev); 864 spin_lock_irqsave(&h->devlock, flags); 865 sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev), 866 sdev_id(sdev), sdev->lun); 867 if (sd != NULL) 868 sdev->hostdata = sd; 869 spin_unlock_irqrestore(&h->devlock, flags); 870 return 0; 871 } 872 873 static void hpsa_slave_destroy(struct scsi_device *sdev) 874 { 875 /* nothing to do. */ 876 } 877 878 static void hpsa_scsi_setup(struct ctlr_info *h) 879 { 880 h->ndevices = 0; 881 h->scsi_host = NULL; 882 spin_lock_init(&h->devlock); 883 } 884 885 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h) 886 { 887 int i; 888 889 if (!h->cmd_sg_list) 890 return; 891 for (i = 0; i < h->nr_cmds; i++) { 892 kfree(h->cmd_sg_list[i]); 893 h->cmd_sg_list[i] = NULL; 894 } 895 kfree(h->cmd_sg_list); 896 h->cmd_sg_list = NULL; 897 } 898 899 static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h) 900 { 901 int i; 902 903 if (h->chainsize <= 0) 904 return 0; 905 906 h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds, 907 GFP_KERNEL); 908 if (!h->cmd_sg_list) 909 return -ENOMEM; 910 for (i = 0; i < h->nr_cmds; i++) { 911 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) * 912 h->chainsize, GFP_KERNEL); 913 if (!h->cmd_sg_list[i]) 914 goto clean; 915 } 916 return 0; 917 918 clean: 919 hpsa_free_sg_chain_blocks(h); 920 return -ENOMEM; 921 } 922 923 static void hpsa_map_sg_chain_block(struct ctlr_info *h, 924 struct CommandList *c) 925 { 926 struct SGDescriptor *chain_sg, *chain_block; 927 u64 temp64; 928 929 chain_sg = &c->SG[h->max_cmd_sg_entries - 1]; 930 chain_block = h->cmd_sg_list[c->cmdindex]; 931 chain_sg->Ext = HPSA_SG_CHAIN; 932 chain_sg->Len = sizeof(*chain_sg) * 933 (c->Header.SGTotal - h->max_cmd_sg_entries); 934 temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len, 935 PCI_DMA_TODEVICE); 936 chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL); 937 chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL); 938 } 939 940 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h, 941 struct CommandList *c) 942 { 943 struct SGDescriptor *chain_sg; 944 union u64bit temp64; 945 946 if (c->Header.SGTotal <= h->max_cmd_sg_entries) 947 return; 948 949 chain_sg = &c->SG[h->max_cmd_sg_entries - 1]; 950 temp64.val32.lower = chain_sg->Addr.lower; 951 temp64.val32.upper = chain_sg->Addr.upper; 952 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE); 953 } 954 955 static void complete_scsi_command(struct CommandList *cp, 956 int timeout, u32 tag) 957 { 958 struct scsi_cmnd *cmd; 959 struct ctlr_info *h; 960 struct ErrorInfo *ei; 961 962 unsigned char sense_key; 963 unsigned char asc; /* additional sense code */ 964 unsigned char ascq; /* additional sense code qualifier */ 965 966 ei = cp->err_info; 967 cmd = (struct scsi_cmnd *) cp->scsi_cmd; 968 h = cp->h; 969 970 scsi_dma_unmap(cmd); /* undo the DMA mappings */ 971 if (cp->Header.SGTotal > h->max_cmd_sg_entries) 972 hpsa_unmap_sg_chain_block(h, cp); 973 974 cmd->result = (DID_OK << 16); /* host byte */ 975 cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ 976 cmd->result |= ei->ScsiStatus; 977 978 /* copy the sense data whether we need to or not. */ 979 memcpy(cmd->sense_buffer, ei->SenseInfo, 980 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? 981 SCSI_SENSE_BUFFERSIZE : 982 ei->SenseLen); 983 scsi_set_resid(cmd, ei->ResidualCnt); 984 985 if (ei->CommandStatus == 0) { 986 cmd->scsi_done(cmd); 987 cmd_free(h, cp); 988 return; 989 } 990 991 /* an error has occurred */ 992 switch (ei->CommandStatus) { 993 994 case CMD_TARGET_STATUS: 995 if (ei->ScsiStatus) { 996 /* Get sense key */ 997 sense_key = 0xf & ei->SenseInfo[2]; 998 /* Get additional sense code */ 999 asc = ei->SenseInfo[12]; 1000 /* Get addition sense code qualifier */ 1001 ascq = ei->SenseInfo[13]; 1002 } 1003 1004 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) { 1005 if (check_for_unit_attention(h, cp)) { 1006 cmd->result = DID_SOFT_ERROR << 16; 1007 break; 1008 } 1009 if (sense_key == ILLEGAL_REQUEST) { 1010 /* 1011 * SCSI REPORT_LUNS is commonly unsupported on 1012 * Smart Array. Suppress noisy complaint. 1013 */ 1014 if (cp->Request.CDB[0] == REPORT_LUNS) 1015 break; 1016 1017 /* If ASC/ASCQ indicate Logical Unit 1018 * Not Supported condition, 1019 */ 1020 if ((asc == 0x25) && (ascq == 0x0)) { 1021 dev_warn(&h->pdev->dev, "cp %p " 1022 "has check condition\n", cp); 1023 break; 1024 } 1025 } 1026 1027 if (sense_key == NOT_READY) { 1028 /* If Sense is Not Ready, Logical Unit 1029 * Not ready, Manual Intervention 1030 * required 1031 */ 1032 if ((asc == 0x04) && (ascq == 0x03)) { 1033 dev_warn(&h->pdev->dev, "cp %p " 1034 "has check condition: unit " 1035 "not ready, manual " 1036 "intervention required\n", cp); 1037 break; 1038 } 1039 } 1040 if (sense_key == ABORTED_COMMAND) { 1041 /* Aborted command is retryable */ 1042 dev_warn(&h->pdev->dev, "cp %p " 1043 "has check condition: aborted command: " 1044 "ASC: 0x%x, ASCQ: 0x%x\n", 1045 cp, asc, ascq); 1046 cmd->result = DID_SOFT_ERROR << 16; 1047 break; 1048 } 1049 /* Must be some other type of check condition */ 1050 dev_warn(&h->pdev->dev, "cp %p has check condition: " 1051 "unknown type: " 1052 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, " 1053 "Returning result: 0x%x, " 1054 "cmd=[%02x %02x %02x %02x %02x " 1055 "%02x %02x %02x %02x %02x %02x " 1056 "%02x %02x %02x %02x %02x]\n", 1057 cp, sense_key, asc, ascq, 1058 cmd->result, 1059 cmd->cmnd[0], cmd->cmnd[1], 1060 cmd->cmnd[2], cmd->cmnd[3], 1061 cmd->cmnd[4], cmd->cmnd[5], 1062 cmd->cmnd[6], cmd->cmnd[7], 1063 cmd->cmnd[8], cmd->cmnd[9], 1064 cmd->cmnd[10], cmd->cmnd[11], 1065 cmd->cmnd[12], cmd->cmnd[13], 1066 cmd->cmnd[14], cmd->cmnd[15]); 1067 break; 1068 } 1069 1070 1071 /* Problem was not a check condition 1072 * Pass it up to the upper layers... 1073 */ 1074 if (ei->ScsiStatus) { 1075 dev_warn(&h->pdev->dev, "cp %p has status 0x%x " 1076 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, " 1077 "Returning result: 0x%x\n", 1078 cp, ei->ScsiStatus, 1079 sense_key, asc, ascq, 1080 cmd->result); 1081 } else { /* scsi status is zero??? How??? */ 1082 dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. " 1083 "Returning no connection.\n", cp), 1084 1085 /* Ordinarily, this case should never happen, 1086 * but there is a bug in some released firmware 1087 * revisions that allows it to happen if, for 1088 * example, a 4100 backplane loses power and 1089 * the tape drive is in it. We assume that 1090 * it's a fatal error of some kind because we 1091 * can't show that it wasn't. We will make it 1092 * look like selection timeout since that is 1093 * the most common reason for this to occur, 1094 * and it's severe enough. 1095 */ 1096 1097 cmd->result = DID_NO_CONNECT << 16; 1098 } 1099 break; 1100 1101 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ 1102 break; 1103 case CMD_DATA_OVERRUN: 1104 dev_warn(&h->pdev->dev, "cp %p has" 1105 " completed with data overrun " 1106 "reported\n", cp); 1107 break; 1108 case CMD_INVALID: { 1109 /* print_bytes(cp, sizeof(*cp), 1, 0); 1110 print_cmd(cp); */ 1111 /* We get CMD_INVALID if you address a non-existent device 1112 * instead of a selection timeout (no response). You will 1113 * see this if you yank out a drive, then try to access it. 1114 * This is kind of a shame because it means that any other 1115 * CMD_INVALID (e.g. driver bug) will get interpreted as a 1116 * missing target. */ 1117 cmd->result = DID_NO_CONNECT << 16; 1118 } 1119 break; 1120 case CMD_PROTOCOL_ERR: 1121 dev_warn(&h->pdev->dev, "cp %p has " 1122 "protocol error \n", cp); 1123 break; 1124 case CMD_HARDWARE_ERR: 1125 cmd->result = DID_ERROR << 16; 1126 dev_warn(&h->pdev->dev, "cp %p had hardware error\n", cp); 1127 break; 1128 case CMD_CONNECTION_LOST: 1129 cmd->result = DID_ERROR << 16; 1130 dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp); 1131 break; 1132 case CMD_ABORTED: 1133 cmd->result = DID_ABORT << 16; 1134 dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n", 1135 cp, ei->ScsiStatus); 1136 break; 1137 case CMD_ABORT_FAILED: 1138 cmd->result = DID_ERROR << 16; 1139 dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp); 1140 break; 1141 case CMD_UNSOLICITED_ABORT: 1142 cmd->result = DID_RESET << 16; 1143 dev_warn(&h->pdev->dev, "cp %p aborted do to an unsolicited " 1144 "abort\n", cp); 1145 break; 1146 case CMD_TIMEOUT: 1147 cmd->result = DID_TIME_OUT << 16; 1148 dev_warn(&h->pdev->dev, "cp %p timedout\n", cp); 1149 break; 1150 default: 1151 cmd->result = DID_ERROR << 16; 1152 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n", 1153 cp, ei->CommandStatus); 1154 } 1155 cmd->scsi_done(cmd); 1156 cmd_free(h, cp); 1157 } 1158 1159 static int hpsa_scsi_detect(struct ctlr_info *h) 1160 { 1161 struct Scsi_Host *sh; 1162 int error; 1163 1164 sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h)); 1165 if (sh == NULL) 1166 goto fail; 1167 1168 sh->io_port = 0; 1169 sh->n_io_port = 0; 1170 sh->this_id = -1; 1171 sh->max_channel = 3; 1172 sh->max_cmd_len = MAX_COMMAND_SIZE; 1173 sh->max_lun = HPSA_MAX_LUN; 1174 sh->max_id = HPSA_MAX_LUN; 1175 sh->can_queue = h->nr_cmds; 1176 sh->cmd_per_lun = h->nr_cmds; 1177 sh->sg_tablesize = h->maxsgentries; 1178 h->scsi_host = sh; 1179 sh->hostdata[0] = (unsigned long) h; 1180 sh->irq = h->intr[PERF_MODE_INT]; 1181 sh->unique_id = sh->irq; 1182 error = scsi_add_host(sh, &h->pdev->dev); 1183 if (error) 1184 goto fail_host_put; 1185 scsi_scan_host(sh); 1186 return 0; 1187 1188 fail_host_put: 1189 dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_add_host" 1190 " failed for controller %d\n", h->ctlr); 1191 scsi_host_put(sh); 1192 return error; 1193 fail: 1194 dev_err(&h->pdev->dev, "hpsa_scsi_detect: scsi_host_alloc" 1195 " failed for controller %d\n", h->ctlr); 1196 return -ENOMEM; 1197 } 1198 1199 static void hpsa_pci_unmap(struct pci_dev *pdev, 1200 struct CommandList *c, int sg_used, int data_direction) 1201 { 1202 int i; 1203 union u64bit addr64; 1204 1205 for (i = 0; i < sg_used; i++) { 1206 addr64.val32.lower = c->SG[i].Addr.lower; 1207 addr64.val32.upper = c->SG[i].Addr.upper; 1208 pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len, 1209 data_direction); 1210 } 1211 } 1212 1213 static void hpsa_map_one(struct pci_dev *pdev, 1214 struct CommandList *cp, 1215 unsigned char *buf, 1216 size_t buflen, 1217 int data_direction) 1218 { 1219 u64 addr64; 1220 1221 if (buflen == 0 || data_direction == PCI_DMA_NONE) { 1222 cp->Header.SGList = 0; 1223 cp->Header.SGTotal = 0; 1224 return; 1225 } 1226 1227 addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction); 1228 cp->SG[0].Addr.lower = 1229 (u32) (addr64 & (u64) 0x00000000FFFFFFFF); 1230 cp->SG[0].Addr.upper = 1231 (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF); 1232 cp->SG[0].Len = buflen; 1233 cp->Header.SGList = (u8) 1; /* no. SGs contig in this cmd */ 1234 cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */ 1235 } 1236 1237 static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h, 1238 struct CommandList *c) 1239 { 1240 DECLARE_COMPLETION_ONSTACK(wait); 1241 1242 c->waiting = &wait; 1243 enqueue_cmd_and_start_io(h, c); 1244 wait_for_completion(&wait); 1245 } 1246 1247 static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h, 1248 struct CommandList *c, int data_direction) 1249 { 1250 int retry_count = 0; 1251 1252 do { 1253 memset(c->err_info, 0, sizeof(c->err_info)); 1254 hpsa_scsi_do_simple_cmd_core(h, c); 1255 retry_count++; 1256 } while (check_for_unit_attention(h, c) && retry_count <= 3); 1257 hpsa_pci_unmap(h->pdev, c, 1, data_direction); 1258 } 1259 1260 static void hpsa_scsi_interpret_error(struct CommandList *cp) 1261 { 1262 struct ErrorInfo *ei; 1263 struct device *d = &cp->h->pdev->dev; 1264 1265 ei = cp->err_info; 1266 switch (ei->CommandStatus) { 1267 case CMD_TARGET_STATUS: 1268 dev_warn(d, "cmd %p has completed with errors\n", cp); 1269 dev_warn(d, "cmd %p has SCSI Status = %x\n", cp, 1270 ei->ScsiStatus); 1271 if (ei->ScsiStatus == 0) 1272 dev_warn(d, "SCSI status is abnormally zero. " 1273 "(probably indicates selection timeout " 1274 "reported incorrectly due to a known " 1275 "firmware bug, circa July, 2001.)\n"); 1276 break; 1277 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ 1278 dev_info(d, "UNDERRUN\n"); 1279 break; 1280 case CMD_DATA_OVERRUN: 1281 dev_warn(d, "cp %p has completed with data overrun\n", cp); 1282 break; 1283 case CMD_INVALID: { 1284 /* controller unfortunately reports SCSI passthru's 1285 * to non-existent targets as invalid commands. 1286 */ 1287 dev_warn(d, "cp %p is reported invalid (probably means " 1288 "target device no longer present)\n", cp); 1289 /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0); 1290 print_cmd(cp); */ 1291 } 1292 break; 1293 case CMD_PROTOCOL_ERR: 1294 dev_warn(d, "cp %p has protocol error \n", cp); 1295 break; 1296 case CMD_HARDWARE_ERR: 1297 /* cmd->result = DID_ERROR << 16; */ 1298 dev_warn(d, "cp %p had hardware error\n", cp); 1299 break; 1300 case CMD_CONNECTION_LOST: 1301 dev_warn(d, "cp %p had connection lost\n", cp); 1302 break; 1303 case CMD_ABORTED: 1304 dev_warn(d, "cp %p was aborted\n", cp); 1305 break; 1306 case CMD_ABORT_FAILED: 1307 dev_warn(d, "cp %p reports abort failed\n", cp); 1308 break; 1309 case CMD_UNSOLICITED_ABORT: 1310 dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp); 1311 break; 1312 case CMD_TIMEOUT: 1313 dev_warn(d, "cp %p timed out\n", cp); 1314 break; 1315 default: 1316 dev_warn(d, "cp %p returned unknown status %x\n", cp, 1317 ei->CommandStatus); 1318 } 1319 } 1320 1321 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr, 1322 unsigned char page, unsigned char *buf, 1323 unsigned char bufsize) 1324 { 1325 int rc = IO_OK; 1326 struct CommandList *c; 1327 struct ErrorInfo *ei; 1328 1329 c = cmd_special_alloc(h); 1330 1331 if (c == NULL) { /* trouble... */ 1332 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n"); 1333 return -ENOMEM; 1334 } 1335 1336 fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD); 1337 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE); 1338 ei = c->err_info; 1339 if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) { 1340 hpsa_scsi_interpret_error(c); 1341 rc = -1; 1342 } 1343 cmd_special_free(h, c); 1344 return rc; 1345 } 1346 1347 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr) 1348 { 1349 int rc = IO_OK; 1350 struct CommandList *c; 1351 struct ErrorInfo *ei; 1352 1353 c = cmd_special_alloc(h); 1354 1355 if (c == NULL) { /* trouble... */ 1356 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n"); 1357 return -ENOMEM; 1358 } 1359 1360 fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG); 1361 hpsa_scsi_do_simple_cmd_core(h, c); 1362 /* no unmap needed here because no data xfer. */ 1363 1364 ei = c->err_info; 1365 if (ei->CommandStatus != 0) { 1366 hpsa_scsi_interpret_error(c); 1367 rc = -1; 1368 } 1369 cmd_special_free(h, c); 1370 return rc; 1371 } 1372 1373 static void hpsa_get_raid_level(struct ctlr_info *h, 1374 unsigned char *scsi3addr, unsigned char *raid_level) 1375 { 1376 int rc; 1377 unsigned char *buf; 1378 1379 *raid_level = RAID_UNKNOWN; 1380 buf = kzalloc(64, GFP_KERNEL); 1381 if (!buf) 1382 return; 1383 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64); 1384 if (rc == 0) 1385 *raid_level = buf[8]; 1386 if (*raid_level > RAID_UNKNOWN) 1387 *raid_level = RAID_UNKNOWN; 1388 kfree(buf); 1389 return; 1390 } 1391 1392 /* Get the device id from inquiry page 0x83 */ 1393 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr, 1394 unsigned char *device_id, int buflen) 1395 { 1396 int rc; 1397 unsigned char *buf; 1398 1399 if (buflen > 16) 1400 buflen = 16; 1401 buf = kzalloc(64, GFP_KERNEL); 1402 if (!buf) 1403 return -1; 1404 rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64); 1405 if (rc == 0) 1406 memcpy(device_id, &buf[8], buflen); 1407 kfree(buf); 1408 return rc != 0; 1409 } 1410 1411 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical, 1412 struct ReportLUNdata *buf, int bufsize, 1413 int extended_response) 1414 { 1415 int rc = IO_OK; 1416 struct CommandList *c; 1417 unsigned char scsi3addr[8]; 1418 struct ErrorInfo *ei; 1419 1420 c = cmd_special_alloc(h); 1421 if (c == NULL) { /* trouble... */ 1422 dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n"); 1423 return -1; 1424 } 1425 /* address the controller */ 1426 memset(scsi3addr, 0, sizeof(scsi3addr)); 1427 fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h, 1428 buf, bufsize, 0, scsi3addr, TYPE_CMD); 1429 if (extended_response) 1430 c->Request.CDB[1] = extended_response; 1431 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE); 1432 ei = c->err_info; 1433 if (ei->CommandStatus != 0 && 1434 ei->CommandStatus != CMD_DATA_UNDERRUN) { 1435 hpsa_scsi_interpret_error(c); 1436 rc = -1; 1437 } 1438 cmd_special_free(h, c); 1439 return rc; 1440 } 1441 1442 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h, 1443 struct ReportLUNdata *buf, 1444 int bufsize, int extended_response) 1445 { 1446 return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response); 1447 } 1448 1449 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h, 1450 struct ReportLUNdata *buf, int bufsize) 1451 { 1452 return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0); 1453 } 1454 1455 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device, 1456 int bus, int target, int lun) 1457 { 1458 device->bus = bus; 1459 device->target = target; 1460 device->lun = lun; 1461 } 1462 1463 static int hpsa_update_device_info(struct ctlr_info *h, 1464 unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device) 1465 { 1466 #define OBDR_TAPE_INQ_SIZE 49 1467 unsigned char *inq_buff; 1468 1469 inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); 1470 if (!inq_buff) 1471 goto bail_out; 1472 1473 /* Do an inquiry to the device to see what it is. */ 1474 if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, 1475 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) { 1476 /* Inquiry failed (msg printed already) */ 1477 dev_err(&h->pdev->dev, 1478 "hpsa_update_device_info: inquiry failed\n"); 1479 goto bail_out; 1480 } 1481 1482 this_device->devtype = (inq_buff[0] & 0x1f); 1483 memcpy(this_device->scsi3addr, scsi3addr, 8); 1484 memcpy(this_device->vendor, &inq_buff[8], 1485 sizeof(this_device->vendor)); 1486 memcpy(this_device->model, &inq_buff[16], 1487 sizeof(this_device->model)); 1488 memcpy(this_device->revision, &inq_buff[32], 1489 sizeof(this_device->revision)); 1490 memset(this_device->device_id, 0, 1491 sizeof(this_device->device_id)); 1492 hpsa_get_device_id(h, scsi3addr, this_device->device_id, 1493 sizeof(this_device->device_id)); 1494 1495 if (this_device->devtype == TYPE_DISK && 1496 is_logical_dev_addr_mode(scsi3addr)) 1497 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level); 1498 else 1499 this_device->raid_level = RAID_UNKNOWN; 1500 1501 kfree(inq_buff); 1502 return 0; 1503 1504 bail_out: 1505 kfree(inq_buff); 1506 return 1; 1507 } 1508 1509 static unsigned char *msa2xxx_model[] = { 1510 "MSA2012", 1511 "MSA2024", 1512 "MSA2312", 1513 "MSA2324", 1514 NULL, 1515 }; 1516 1517 static int is_msa2xxx(struct ctlr_info *h, struct hpsa_scsi_dev_t *device) 1518 { 1519 int i; 1520 1521 for (i = 0; msa2xxx_model[i]; i++) 1522 if (strncmp(device->model, msa2xxx_model[i], 1523 strlen(msa2xxx_model[i])) == 0) 1524 return 1; 1525 return 0; 1526 } 1527 1528 /* Helper function to assign bus, target, lun mapping of devices. 1529 * Puts non-msa2xxx logical volumes on bus 0, msa2xxx logical 1530 * volumes on bus 1, physical devices on bus 2. and the hba on bus 3. 1531 * Logical drive target and lun are assigned at this time, but 1532 * physical device lun and target assignment are deferred (assigned 1533 * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.) 1534 */ 1535 static void figure_bus_target_lun(struct ctlr_info *h, 1536 u8 *lunaddrbytes, int *bus, int *target, int *lun, 1537 struct hpsa_scsi_dev_t *device) 1538 { 1539 u32 lunid; 1540 1541 if (is_logical_dev_addr_mode(lunaddrbytes)) { 1542 /* logical device */ 1543 if (unlikely(is_scsi_rev_5(h))) { 1544 /* p1210m, logical drives lun assignments 1545 * match SCSI REPORT LUNS data. 1546 */ 1547 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes)); 1548 *bus = 0; 1549 *target = 0; 1550 *lun = (lunid & 0x3fff) + 1; 1551 } else { 1552 /* not p1210m... */ 1553 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes)); 1554 if (is_msa2xxx(h, device)) { 1555 /* msa2xxx way, put logicals on bus 1 1556 * and match target/lun numbers box 1557 * reports. 1558 */ 1559 *bus = 1; 1560 *target = (lunid >> 16) & 0x3fff; 1561 *lun = lunid & 0x00ff; 1562 } else { 1563 /* Traditional smart array way. */ 1564 *bus = 0; 1565 *lun = 0; 1566 *target = lunid & 0x3fff; 1567 } 1568 } 1569 } else { 1570 /* physical device */ 1571 if (is_hba_lunid(lunaddrbytes)) 1572 if (unlikely(is_scsi_rev_5(h))) { 1573 *bus = 0; /* put p1210m ctlr at 0,0,0 */ 1574 *target = 0; 1575 *lun = 0; 1576 return; 1577 } else 1578 *bus = 3; /* traditional smartarray */ 1579 else 1580 *bus = 2; /* physical disk */ 1581 *target = -1; 1582 *lun = -1; /* we will fill these in later. */ 1583 } 1584 } 1585 1586 /* 1587 * If there is no lun 0 on a target, linux won't find any devices. 1588 * For the MSA2xxx boxes, we have to manually detect the enclosure 1589 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report 1590 * it for some reason. *tmpdevice is the target we're adding, 1591 * this_device is a pointer into the current element of currentsd[] 1592 * that we're building up in update_scsi_devices(), below. 1593 * lunzerobits is a bitmap that tracks which targets already have a 1594 * lun 0 assigned. 1595 * Returns 1 if an enclosure was added, 0 if not. 1596 */ 1597 static int add_msa2xxx_enclosure_device(struct ctlr_info *h, 1598 struct hpsa_scsi_dev_t *tmpdevice, 1599 struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes, 1600 int bus, int target, int lun, unsigned long lunzerobits[], 1601 int *nmsa2xxx_enclosures) 1602 { 1603 unsigned char scsi3addr[8]; 1604 1605 if (test_bit(target, lunzerobits)) 1606 return 0; /* There is already a lun 0 on this target. */ 1607 1608 if (!is_logical_dev_addr_mode(lunaddrbytes)) 1609 return 0; /* It's the logical targets that may lack lun 0. */ 1610 1611 if (!is_msa2xxx(h, tmpdevice)) 1612 return 0; /* It's only the MSA2xxx that have this problem. */ 1613 1614 if (lun == 0) /* if lun is 0, then obviously we have a lun 0. */ 1615 return 0; 1616 1617 if (is_hba_lunid(scsi3addr)) 1618 return 0; /* Don't add the RAID controller here. */ 1619 1620 if (is_scsi_rev_5(h)) 1621 return 0; /* p1210m doesn't need to do this. */ 1622 1623 #define MAX_MSA2XXX_ENCLOSURES 32 1624 if (*nmsa2xxx_enclosures >= MAX_MSA2XXX_ENCLOSURES) { 1625 dev_warn(&h->pdev->dev, "Maximum number of MSA2XXX " 1626 "enclosures exceeded. Check your hardware " 1627 "configuration."); 1628 return 0; 1629 } 1630 1631 memset(scsi3addr, 0, 8); 1632 scsi3addr[3] = target; 1633 if (hpsa_update_device_info(h, scsi3addr, this_device)) 1634 return 0; 1635 (*nmsa2xxx_enclosures)++; 1636 hpsa_set_bus_target_lun(this_device, bus, target, 0); 1637 set_bit(target, lunzerobits); 1638 return 1; 1639 } 1640 1641 /* 1642 * Do CISS_REPORT_PHYS and CISS_REPORT_LOG. Data is returned in physdev, 1643 * logdev. The number of luns in physdev and logdev are returned in 1644 * *nphysicals and *nlogicals, respectively. 1645 * Returns 0 on success, -1 otherwise. 1646 */ 1647 static int hpsa_gather_lun_info(struct ctlr_info *h, 1648 int reportlunsize, 1649 struct ReportLUNdata *physdev, u32 *nphysicals, 1650 struct ReportLUNdata *logdev, u32 *nlogicals) 1651 { 1652 if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) { 1653 dev_err(&h->pdev->dev, "report physical LUNs failed.\n"); 1654 return -1; 1655 } 1656 *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8; 1657 if (*nphysicals > HPSA_MAX_PHYS_LUN) { 1658 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded." 1659 " %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN, 1660 *nphysicals - HPSA_MAX_PHYS_LUN); 1661 *nphysicals = HPSA_MAX_PHYS_LUN; 1662 } 1663 if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) { 1664 dev_err(&h->pdev->dev, "report logical LUNs failed.\n"); 1665 return -1; 1666 } 1667 *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8; 1668 /* Reject Logicals in excess of our max capability. */ 1669 if (*nlogicals > HPSA_MAX_LUN) { 1670 dev_warn(&h->pdev->dev, 1671 "maximum logical LUNs (%d) exceeded. " 1672 "%d LUNs ignored.\n", HPSA_MAX_LUN, 1673 *nlogicals - HPSA_MAX_LUN); 1674 *nlogicals = HPSA_MAX_LUN; 1675 } 1676 if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) { 1677 dev_warn(&h->pdev->dev, 1678 "maximum logical + physical LUNs (%d) exceeded. " 1679 "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN, 1680 *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN); 1681 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals; 1682 } 1683 return 0; 1684 } 1685 1686 u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i, 1687 int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list, 1688 struct ReportLUNdata *logdev_list) 1689 { 1690 /* Helper function, figure out where the LUN ID info is coming from 1691 * given index i, lists of physical and logical devices, where in 1692 * the list the raid controller is supposed to appear (first or last) 1693 */ 1694 1695 int logicals_start = nphysicals + (raid_ctlr_position == 0); 1696 int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0); 1697 1698 if (i == raid_ctlr_position) 1699 return RAID_CTLR_LUNID; 1700 1701 if (i < logicals_start) 1702 return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0]; 1703 1704 if (i < last_device) 1705 return &logdev_list->LUN[i - nphysicals - 1706 (raid_ctlr_position == 0)][0]; 1707 BUG(); 1708 return NULL; 1709 } 1710 1711 static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno) 1712 { 1713 /* the idea here is we could get notified 1714 * that some devices have changed, so we do a report 1715 * physical luns and report logical luns cmd, and adjust 1716 * our list of devices accordingly. 1717 * 1718 * The scsi3addr's of devices won't change so long as the 1719 * adapter is not reset. That means we can rescan and 1720 * tell which devices we already know about, vs. new 1721 * devices, vs. disappearing devices. 1722 */ 1723 struct ReportLUNdata *physdev_list = NULL; 1724 struct ReportLUNdata *logdev_list = NULL; 1725 unsigned char *inq_buff = NULL; 1726 u32 nphysicals = 0; 1727 u32 nlogicals = 0; 1728 u32 ndev_allocated = 0; 1729 struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice; 1730 int ncurrent = 0; 1731 int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8; 1732 int i, nmsa2xxx_enclosures, ndevs_to_allocate; 1733 int bus, target, lun; 1734 int raid_ctlr_position; 1735 DECLARE_BITMAP(lunzerobits, HPSA_MAX_TARGETS_PER_CTLR); 1736 1737 currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_SCSI_DEVS_PER_HBA, 1738 GFP_KERNEL); 1739 physdev_list = kzalloc(reportlunsize, GFP_KERNEL); 1740 logdev_list = kzalloc(reportlunsize, GFP_KERNEL); 1741 inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); 1742 tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL); 1743 1744 if (!currentsd || !physdev_list || !logdev_list || 1745 !inq_buff || !tmpdevice) { 1746 dev_err(&h->pdev->dev, "out of memory\n"); 1747 goto out; 1748 } 1749 memset(lunzerobits, 0, sizeof(lunzerobits)); 1750 1751 if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals, 1752 logdev_list, &nlogicals)) 1753 goto out; 1754 1755 /* We might see up to 32 MSA2xxx enclosures, actually 8 of them 1756 * but each of them 4 times through different paths. The plus 1 1757 * is for the RAID controller. 1758 */ 1759 ndevs_to_allocate = nphysicals + nlogicals + MAX_MSA2XXX_ENCLOSURES + 1; 1760 1761 /* Allocate the per device structures */ 1762 for (i = 0; i < ndevs_to_allocate; i++) { 1763 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL); 1764 if (!currentsd[i]) { 1765 dev_warn(&h->pdev->dev, "out of memory at %s:%d\n", 1766 __FILE__, __LINE__); 1767 goto out; 1768 } 1769 ndev_allocated++; 1770 } 1771 1772 if (unlikely(is_scsi_rev_5(h))) 1773 raid_ctlr_position = 0; 1774 else 1775 raid_ctlr_position = nphysicals + nlogicals; 1776 1777 /* adjust our table of devices */ 1778 nmsa2xxx_enclosures = 0; 1779 for (i = 0; i < nphysicals + nlogicals + 1; i++) { 1780 u8 *lunaddrbytes; 1781 1782 /* Figure out where the LUN ID info is coming from */ 1783 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position, 1784 i, nphysicals, nlogicals, physdev_list, logdev_list); 1785 /* skip masked physical devices. */ 1786 if (lunaddrbytes[3] & 0xC0 && 1787 i < nphysicals + (raid_ctlr_position == 0)) 1788 continue; 1789 1790 /* Get device type, vendor, model, device id */ 1791 if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice)) 1792 continue; /* skip it if we can't talk to it. */ 1793 figure_bus_target_lun(h, lunaddrbytes, &bus, &target, &lun, 1794 tmpdevice); 1795 this_device = currentsd[ncurrent]; 1796 1797 /* 1798 * For the msa2xxx boxes, we have to insert a LUN 0 which 1799 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there 1800 * is nonetheless an enclosure device there. We have to 1801 * present that otherwise linux won't find anything if 1802 * there is no lun 0. 1803 */ 1804 if (add_msa2xxx_enclosure_device(h, tmpdevice, this_device, 1805 lunaddrbytes, bus, target, lun, lunzerobits, 1806 &nmsa2xxx_enclosures)) { 1807 ncurrent++; 1808 this_device = currentsd[ncurrent]; 1809 } 1810 1811 *this_device = *tmpdevice; 1812 hpsa_set_bus_target_lun(this_device, bus, target, lun); 1813 1814 switch (this_device->devtype) { 1815 case TYPE_ROM: { 1816 /* We don't *really* support actual CD-ROM devices, 1817 * just "One Button Disaster Recovery" tape drive 1818 * which temporarily pretends to be a CD-ROM drive. 1819 * So we check that the device is really an OBDR tape 1820 * device by checking for "$DR-10" in bytes 43-48 of 1821 * the inquiry data. 1822 */ 1823 char obdr_sig[7]; 1824 #define OBDR_TAPE_SIG "$DR-10" 1825 strncpy(obdr_sig, &inq_buff[43], 6); 1826 obdr_sig[6] = '\0'; 1827 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) 1828 /* Not OBDR device, ignore it. */ 1829 break; 1830 } 1831 ncurrent++; 1832 break; 1833 case TYPE_DISK: 1834 if (i < nphysicals) 1835 break; 1836 ncurrent++; 1837 break; 1838 case TYPE_TAPE: 1839 case TYPE_MEDIUM_CHANGER: 1840 ncurrent++; 1841 break; 1842 case TYPE_RAID: 1843 /* Only present the Smartarray HBA as a RAID controller. 1844 * If it's a RAID controller other than the HBA itself 1845 * (an external RAID controller, MSA500 or similar) 1846 * don't present it. 1847 */ 1848 if (!is_hba_lunid(lunaddrbytes)) 1849 break; 1850 ncurrent++; 1851 break; 1852 default: 1853 break; 1854 } 1855 if (ncurrent >= HPSA_MAX_SCSI_DEVS_PER_HBA) 1856 break; 1857 } 1858 adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent); 1859 out: 1860 kfree(tmpdevice); 1861 for (i = 0; i < ndev_allocated; i++) 1862 kfree(currentsd[i]); 1863 kfree(currentsd); 1864 kfree(inq_buff); 1865 kfree(physdev_list); 1866 kfree(logdev_list); 1867 } 1868 1869 /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci 1870 * dma mapping and fills in the scatter gather entries of the 1871 * hpsa command, cp. 1872 */ 1873 static int hpsa_scatter_gather(struct ctlr_info *h, 1874 struct CommandList *cp, 1875 struct scsi_cmnd *cmd) 1876 { 1877 unsigned int len; 1878 struct scatterlist *sg; 1879 u64 addr64; 1880 int use_sg, i, sg_index, chained; 1881 struct SGDescriptor *curr_sg; 1882 1883 BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); 1884 1885 use_sg = scsi_dma_map(cmd); 1886 if (use_sg < 0) 1887 return use_sg; 1888 1889 if (!use_sg) 1890 goto sglist_finished; 1891 1892 curr_sg = cp->SG; 1893 chained = 0; 1894 sg_index = 0; 1895 scsi_for_each_sg(cmd, sg, use_sg, i) { 1896 if (i == h->max_cmd_sg_entries - 1 && 1897 use_sg > h->max_cmd_sg_entries) { 1898 chained = 1; 1899 curr_sg = h->cmd_sg_list[cp->cmdindex]; 1900 sg_index = 0; 1901 } 1902 addr64 = (u64) sg_dma_address(sg); 1903 len = sg_dma_len(sg); 1904 curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL); 1905 curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); 1906 curr_sg->Len = len; 1907 curr_sg->Ext = 0; /* we are not chaining */ 1908 curr_sg++; 1909 } 1910 1911 if (use_sg + chained > h->maxSG) 1912 h->maxSG = use_sg + chained; 1913 1914 if (chained) { 1915 cp->Header.SGList = h->max_cmd_sg_entries; 1916 cp->Header.SGTotal = (u16) (use_sg + 1); 1917 hpsa_map_sg_chain_block(h, cp); 1918 return 0; 1919 } 1920 1921 sglist_finished: 1922 1923 cp->Header.SGList = (u8) use_sg; /* no. SGs contig in this cmd */ 1924 cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */ 1925 return 0; 1926 } 1927 1928 1929 static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd, 1930 void (*done)(struct scsi_cmnd *)) 1931 { 1932 struct ctlr_info *h; 1933 struct hpsa_scsi_dev_t *dev; 1934 unsigned char scsi3addr[8]; 1935 struct CommandList *c; 1936 unsigned long flags; 1937 1938 /* Get the ptr to our adapter structure out of cmd->host. */ 1939 h = sdev_to_hba(cmd->device); 1940 dev = cmd->device->hostdata; 1941 if (!dev) { 1942 cmd->result = DID_NO_CONNECT << 16; 1943 done(cmd); 1944 return 0; 1945 } 1946 memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr)); 1947 1948 /* Need a lock as this is being allocated from the pool */ 1949 spin_lock_irqsave(&h->lock, flags); 1950 c = cmd_alloc(h); 1951 spin_unlock_irqrestore(&h->lock, flags); 1952 if (c == NULL) { /* trouble... */ 1953 dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n"); 1954 return SCSI_MLQUEUE_HOST_BUSY; 1955 } 1956 1957 /* Fill in the command list header */ 1958 1959 cmd->scsi_done = done; /* save this for use by completion code */ 1960 1961 /* save c in case we have to abort it */ 1962 cmd->host_scribble = (unsigned char *) c; 1963 1964 c->cmd_type = CMD_SCSI; 1965 c->scsi_cmd = cmd; 1966 c->Header.ReplyQueue = 0; /* unused in simple mode */ 1967 memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); 1968 c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT); 1969 c->Header.Tag.lower |= DIRECT_LOOKUP_BIT; 1970 1971 /* Fill in the request block... */ 1972 1973 c->Request.Timeout = 0; 1974 memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); 1975 BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB)); 1976 c->Request.CDBLen = cmd->cmd_len; 1977 memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len); 1978 c->Request.Type.Type = TYPE_CMD; 1979 c->Request.Type.Attribute = ATTR_SIMPLE; 1980 switch (cmd->sc_data_direction) { 1981 case DMA_TO_DEVICE: 1982 c->Request.Type.Direction = XFER_WRITE; 1983 break; 1984 case DMA_FROM_DEVICE: 1985 c->Request.Type.Direction = XFER_READ; 1986 break; 1987 case DMA_NONE: 1988 c->Request.Type.Direction = XFER_NONE; 1989 break; 1990 case DMA_BIDIRECTIONAL: 1991 /* This can happen if a buggy application does a scsi passthru 1992 * and sets both inlen and outlen to non-zero. ( see 1993 * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) 1994 */ 1995 1996 c->Request.Type.Direction = XFER_RSVD; 1997 /* This is technically wrong, and hpsa controllers should 1998 * reject it with CMD_INVALID, which is the most correct 1999 * response, but non-fibre backends appear to let it 2000 * slide by, and give the same results as if this field 2001 * were set correctly. Either way is acceptable for 2002 * our purposes here. 2003 */ 2004 2005 break; 2006 2007 default: 2008 dev_err(&h->pdev->dev, "unknown data direction: %d\n", 2009 cmd->sc_data_direction); 2010 BUG(); 2011 break; 2012 } 2013 2014 if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */ 2015 cmd_free(h, c); 2016 return SCSI_MLQUEUE_HOST_BUSY; 2017 } 2018 enqueue_cmd_and_start_io(h, c); 2019 /* the cmd'll come back via intr handler in complete_scsi_command() */ 2020 return 0; 2021 } 2022 2023 static void hpsa_scan_start(struct Scsi_Host *sh) 2024 { 2025 struct ctlr_info *h = shost_to_hba(sh); 2026 unsigned long flags; 2027 2028 /* wait until any scan already in progress is finished. */ 2029 while (1) { 2030 spin_lock_irqsave(&h->scan_lock, flags); 2031 if (h->scan_finished) 2032 break; 2033 spin_unlock_irqrestore(&h->scan_lock, flags); 2034 wait_event(h->scan_wait_queue, h->scan_finished); 2035 /* Note: We don't need to worry about a race between this 2036 * thread and driver unload because the midlayer will 2037 * have incremented the reference count, so unload won't 2038 * happen if we're in here. 2039 */ 2040 } 2041 h->scan_finished = 0; /* mark scan as in progress */ 2042 spin_unlock_irqrestore(&h->scan_lock, flags); 2043 2044 hpsa_update_scsi_devices(h, h->scsi_host->host_no); 2045 2046 spin_lock_irqsave(&h->scan_lock, flags); 2047 h->scan_finished = 1; /* mark scan as finished. */ 2048 wake_up_all(&h->scan_wait_queue); 2049 spin_unlock_irqrestore(&h->scan_lock, flags); 2050 } 2051 2052 static int hpsa_scan_finished(struct Scsi_Host *sh, 2053 unsigned long elapsed_time) 2054 { 2055 struct ctlr_info *h = shost_to_hba(sh); 2056 unsigned long flags; 2057 int finished; 2058 2059 spin_lock_irqsave(&h->scan_lock, flags); 2060 finished = h->scan_finished; 2061 spin_unlock_irqrestore(&h->scan_lock, flags); 2062 return finished; 2063 } 2064 2065 static int hpsa_change_queue_depth(struct scsi_device *sdev, 2066 int qdepth, int reason) 2067 { 2068 struct ctlr_info *h = sdev_to_hba(sdev); 2069 2070 if (reason != SCSI_QDEPTH_DEFAULT) 2071 return -ENOTSUPP; 2072 2073 if (qdepth < 1) 2074 qdepth = 1; 2075 else 2076 if (qdepth > h->nr_cmds) 2077 qdepth = h->nr_cmds; 2078 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); 2079 return sdev->queue_depth; 2080 } 2081 2082 static void hpsa_unregister_scsi(struct ctlr_info *h) 2083 { 2084 /* we are being forcibly unloaded, and may not refuse. */ 2085 scsi_remove_host(h->scsi_host); 2086 scsi_host_put(h->scsi_host); 2087 h->scsi_host = NULL; 2088 } 2089 2090 static int hpsa_register_scsi(struct ctlr_info *h) 2091 { 2092 int rc; 2093 2094 rc = hpsa_scsi_detect(h); 2095 if (rc != 0) 2096 dev_err(&h->pdev->dev, "hpsa_register_scsi: failed" 2097 " hpsa_scsi_detect(), rc is %d\n", rc); 2098 return rc; 2099 } 2100 2101 static int wait_for_device_to_become_ready(struct ctlr_info *h, 2102 unsigned char lunaddr[]) 2103 { 2104 int rc = 0; 2105 int count = 0; 2106 int waittime = 1; /* seconds */ 2107 struct CommandList *c; 2108 2109 c = cmd_special_alloc(h); 2110 if (!c) { 2111 dev_warn(&h->pdev->dev, "out of memory in " 2112 "wait_for_device_to_become_ready.\n"); 2113 return IO_ERROR; 2114 } 2115 2116 /* Send test unit ready until device ready, or give up. */ 2117 while (count < HPSA_TUR_RETRY_LIMIT) { 2118 2119 /* Wait for a bit. do this first, because if we send 2120 * the TUR right away, the reset will just abort it. 2121 */ 2122 msleep(1000 * waittime); 2123 count++; 2124 2125 /* Increase wait time with each try, up to a point. */ 2126 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS) 2127 waittime = waittime * 2; 2128 2129 /* Send the Test Unit Ready */ 2130 fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD); 2131 hpsa_scsi_do_simple_cmd_core(h, c); 2132 /* no unmap needed here because no data xfer. */ 2133 2134 if (c->err_info->CommandStatus == CMD_SUCCESS) 2135 break; 2136 2137 if (c->err_info->CommandStatus == CMD_TARGET_STATUS && 2138 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION && 2139 (c->err_info->SenseInfo[2] == NO_SENSE || 2140 c->err_info->SenseInfo[2] == UNIT_ATTENTION)) 2141 break; 2142 2143 dev_warn(&h->pdev->dev, "waiting %d secs " 2144 "for device to become ready.\n", waittime); 2145 rc = 1; /* device not ready. */ 2146 } 2147 2148 if (rc) 2149 dev_warn(&h->pdev->dev, "giving up on device.\n"); 2150 else 2151 dev_warn(&h->pdev->dev, "device is ready.\n"); 2152 2153 cmd_special_free(h, c); 2154 return rc; 2155 } 2156 2157 /* Need at least one of these error handlers to keep ../scsi/hosts.c from 2158 * complaining. Doing a host- or bus-reset can't do anything good here. 2159 */ 2160 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd) 2161 { 2162 int rc; 2163 struct ctlr_info *h; 2164 struct hpsa_scsi_dev_t *dev; 2165 2166 /* find the controller to which the command to be aborted was sent */ 2167 h = sdev_to_hba(scsicmd->device); 2168 if (h == NULL) /* paranoia */ 2169 return FAILED; 2170 dev = scsicmd->device->hostdata; 2171 if (!dev) { 2172 dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: " 2173 "device lookup failed.\n"); 2174 return FAILED; 2175 } 2176 dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n", 2177 h->scsi_host->host_no, dev->bus, dev->target, dev->lun); 2178 /* send a reset to the SCSI LUN which the command was sent to */ 2179 rc = hpsa_send_reset(h, dev->scsi3addr); 2180 if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0) 2181 return SUCCESS; 2182 2183 dev_warn(&h->pdev->dev, "resetting device failed.\n"); 2184 return FAILED; 2185 } 2186 2187 /* 2188 * For operations that cannot sleep, a command block is allocated at init, 2189 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track 2190 * which ones are free or in use. Lock must be held when calling this. 2191 * cmd_free() is the complement. 2192 */ 2193 static struct CommandList *cmd_alloc(struct ctlr_info *h) 2194 { 2195 struct CommandList *c; 2196 int i; 2197 union u64bit temp64; 2198 dma_addr_t cmd_dma_handle, err_dma_handle; 2199 2200 do { 2201 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); 2202 if (i == h->nr_cmds) 2203 return NULL; 2204 } while (test_and_set_bit 2205 (i & (BITS_PER_LONG - 1), 2206 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0); 2207 c = h->cmd_pool + i; 2208 memset(c, 0, sizeof(*c)); 2209 cmd_dma_handle = h->cmd_pool_dhandle 2210 + i * sizeof(*c); 2211 c->err_info = h->errinfo_pool + i; 2212 memset(c->err_info, 0, sizeof(*c->err_info)); 2213 err_dma_handle = h->errinfo_pool_dhandle 2214 + i * sizeof(*c->err_info); 2215 h->nr_allocs++; 2216 2217 c->cmdindex = i; 2218 2219 INIT_HLIST_NODE(&c->list); 2220 c->busaddr = (u32) cmd_dma_handle; 2221 temp64.val = (u64) err_dma_handle; 2222 c->ErrDesc.Addr.lower = temp64.val32.lower; 2223 c->ErrDesc.Addr.upper = temp64.val32.upper; 2224 c->ErrDesc.Len = sizeof(*c->err_info); 2225 2226 c->h = h; 2227 return c; 2228 } 2229 2230 /* For operations that can wait for kmalloc to possibly sleep, 2231 * this routine can be called. Lock need not be held to call 2232 * cmd_special_alloc. cmd_special_free() is the complement. 2233 */ 2234 static struct CommandList *cmd_special_alloc(struct ctlr_info *h) 2235 { 2236 struct CommandList *c; 2237 union u64bit temp64; 2238 dma_addr_t cmd_dma_handle, err_dma_handle; 2239 2240 c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle); 2241 if (c == NULL) 2242 return NULL; 2243 memset(c, 0, sizeof(*c)); 2244 2245 c->cmdindex = -1; 2246 2247 c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info), 2248 &err_dma_handle); 2249 2250 if (c->err_info == NULL) { 2251 pci_free_consistent(h->pdev, 2252 sizeof(*c), c, cmd_dma_handle); 2253 return NULL; 2254 } 2255 memset(c->err_info, 0, sizeof(*c->err_info)); 2256 2257 INIT_HLIST_NODE(&c->list); 2258 c->busaddr = (u32) cmd_dma_handle; 2259 temp64.val = (u64) err_dma_handle; 2260 c->ErrDesc.Addr.lower = temp64.val32.lower; 2261 c->ErrDesc.Addr.upper = temp64.val32.upper; 2262 c->ErrDesc.Len = sizeof(*c->err_info); 2263 2264 c->h = h; 2265 return c; 2266 } 2267 2268 static void cmd_free(struct ctlr_info *h, struct CommandList *c) 2269 { 2270 int i; 2271 2272 i = c - h->cmd_pool; 2273 clear_bit(i & (BITS_PER_LONG - 1), 2274 h->cmd_pool_bits + (i / BITS_PER_LONG)); 2275 h->nr_frees++; 2276 } 2277 2278 static void cmd_special_free(struct ctlr_info *h, struct CommandList *c) 2279 { 2280 union u64bit temp64; 2281 2282 temp64.val32.lower = c->ErrDesc.Addr.lower; 2283 temp64.val32.upper = c->ErrDesc.Addr.upper; 2284 pci_free_consistent(h->pdev, sizeof(*c->err_info), 2285 c->err_info, (dma_addr_t) temp64.val); 2286 pci_free_consistent(h->pdev, sizeof(*c), 2287 c, (dma_addr_t) c->busaddr); 2288 } 2289 2290 #ifdef CONFIG_COMPAT 2291 2292 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg) 2293 { 2294 IOCTL32_Command_struct __user *arg32 = 2295 (IOCTL32_Command_struct __user *) arg; 2296 IOCTL_Command_struct arg64; 2297 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); 2298 int err; 2299 u32 cp; 2300 2301 err = 0; 2302 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 2303 sizeof(arg64.LUN_info)); 2304 err |= copy_from_user(&arg64.Request, &arg32->Request, 2305 sizeof(arg64.Request)); 2306 err |= copy_from_user(&arg64.error_info, &arg32->error_info, 2307 sizeof(arg64.error_info)); 2308 err |= get_user(arg64.buf_size, &arg32->buf_size); 2309 err |= get_user(cp, &arg32->buf); 2310 arg64.buf = compat_ptr(cp); 2311 err |= copy_to_user(p, &arg64, sizeof(arg64)); 2312 2313 if (err) 2314 return -EFAULT; 2315 2316 err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p); 2317 if (err) 2318 return err; 2319 err |= copy_in_user(&arg32->error_info, &p->error_info, 2320 sizeof(arg32->error_info)); 2321 if (err) 2322 return -EFAULT; 2323 return err; 2324 } 2325 2326 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev, 2327 int cmd, void *arg) 2328 { 2329 BIG_IOCTL32_Command_struct __user *arg32 = 2330 (BIG_IOCTL32_Command_struct __user *) arg; 2331 BIG_IOCTL_Command_struct arg64; 2332 BIG_IOCTL_Command_struct __user *p = 2333 compat_alloc_user_space(sizeof(arg64)); 2334 int err; 2335 u32 cp; 2336 2337 err = 0; 2338 err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info, 2339 sizeof(arg64.LUN_info)); 2340 err |= copy_from_user(&arg64.Request, &arg32->Request, 2341 sizeof(arg64.Request)); 2342 err |= copy_from_user(&arg64.error_info, &arg32->error_info, 2343 sizeof(arg64.error_info)); 2344 err |= get_user(arg64.buf_size, &arg32->buf_size); 2345 err |= get_user(arg64.malloc_size, &arg32->malloc_size); 2346 err |= get_user(cp, &arg32->buf); 2347 arg64.buf = compat_ptr(cp); 2348 err |= copy_to_user(p, &arg64, sizeof(arg64)); 2349 2350 if (err) 2351 return -EFAULT; 2352 2353 err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p); 2354 if (err) 2355 return err; 2356 err |= copy_in_user(&arg32->error_info, &p->error_info, 2357 sizeof(arg32->error_info)); 2358 if (err) 2359 return -EFAULT; 2360 return err; 2361 } 2362 2363 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg) 2364 { 2365 switch (cmd) { 2366 case CCISS_GETPCIINFO: 2367 case CCISS_GETINTINFO: 2368 case CCISS_SETINTINFO: 2369 case CCISS_GETNODENAME: 2370 case CCISS_SETNODENAME: 2371 case CCISS_GETHEARTBEAT: 2372 case CCISS_GETBUSTYPES: 2373 case CCISS_GETFIRMVER: 2374 case CCISS_GETDRIVVER: 2375 case CCISS_REVALIDVOLS: 2376 case CCISS_DEREGDISK: 2377 case CCISS_REGNEWDISK: 2378 case CCISS_REGNEWD: 2379 case CCISS_RESCANDISK: 2380 case CCISS_GETLUNINFO: 2381 return hpsa_ioctl(dev, cmd, arg); 2382 2383 case CCISS_PASSTHRU32: 2384 return hpsa_ioctl32_passthru(dev, cmd, arg); 2385 case CCISS_BIG_PASSTHRU32: 2386 return hpsa_ioctl32_big_passthru(dev, cmd, arg); 2387 2388 default: 2389 return -ENOIOCTLCMD; 2390 } 2391 } 2392 #endif 2393 2394 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp) 2395 { 2396 struct hpsa_pci_info pciinfo; 2397 2398 if (!argp) 2399 return -EINVAL; 2400 pciinfo.domain = pci_domain_nr(h->pdev->bus); 2401 pciinfo.bus = h->pdev->bus->number; 2402 pciinfo.dev_fn = h->pdev->devfn; 2403 pciinfo.board_id = h->board_id; 2404 if (copy_to_user(argp, &pciinfo, sizeof(pciinfo))) 2405 return -EFAULT; 2406 return 0; 2407 } 2408 2409 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp) 2410 { 2411 DriverVer_type DriverVer; 2412 unsigned char vmaj, vmin, vsubmin; 2413 int rc; 2414 2415 rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu", 2416 &vmaj, &vmin, &vsubmin); 2417 if (rc != 3) { 2418 dev_info(&h->pdev->dev, "driver version string '%s' " 2419 "unrecognized.", HPSA_DRIVER_VERSION); 2420 vmaj = 0; 2421 vmin = 0; 2422 vsubmin = 0; 2423 } 2424 DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin; 2425 if (!argp) 2426 return -EINVAL; 2427 if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type))) 2428 return -EFAULT; 2429 return 0; 2430 } 2431 2432 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp) 2433 { 2434 IOCTL_Command_struct iocommand; 2435 struct CommandList *c; 2436 char *buff = NULL; 2437 union u64bit temp64; 2438 2439 if (!argp) 2440 return -EINVAL; 2441 if (!capable(CAP_SYS_RAWIO)) 2442 return -EPERM; 2443 if (copy_from_user(&iocommand, argp, sizeof(iocommand))) 2444 return -EFAULT; 2445 if ((iocommand.buf_size < 1) && 2446 (iocommand.Request.Type.Direction != XFER_NONE)) { 2447 return -EINVAL; 2448 } 2449 if (iocommand.buf_size > 0) { 2450 buff = kmalloc(iocommand.buf_size, GFP_KERNEL); 2451 if (buff == NULL) 2452 return -EFAULT; 2453 } 2454 if (iocommand.Request.Type.Direction == XFER_WRITE) { 2455 /* Copy the data into the buffer we created */ 2456 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) { 2457 kfree(buff); 2458 return -EFAULT; 2459 } 2460 } else 2461 memset(buff, 0, iocommand.buf_size); 2462 c = cmd_special_alloc(h); 2463 if (c == NULL) { 2464 kfree(buff); 2465 return -ENOMEM; 2466 } 2467 /* Fill in the command type */ 2468 c->cmd_type = CMD_IOCTL_PEND; 2469 /* Fill in Command Header */ 2470 c->Header.ReplyQueue = 0; /* unused in simple mode */ 2471 if (iocommand.buf_size > 0) { /* buffer to fill */ 2472 c->Header.SGList = 1; 2473 c->Header.SGTotal = 1; 2474 } else { /* no buffers to fill */ 2475 c->Header.SGList = 0; 2476 c->Header.SGTotal = 0; 2477 } 2478 memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN)); 2479 /* use the kernel address the cmd block for tag */ 2480 c->Header.Tag.lower = c->busaddr; 2481 2482 /* Fill in Request block */ 2483 memcpy(&c->Request, &iocommand.Request, 2484 sizeof(c->Request)); 2485 2486 /* Fill in the scatter gather information */ 2487 if (iocommand.buf_size > 0) { 2488 temp64.val = pci_map_single(h->pdev, buff, 2489 iocommand.buf_size, PCI_DMA_BIDIRECTIONAL); 2490 c->SG[0].Addr.lower = temp64.val32.lower; 2491 c->SG[0].Addr.upper = temp64.val32.upper; 2492 c->SG[0].Len = iocommand.buf_size; 2493 c->SG[0].Ext = 0; /* we are not chaining*/ 2494 } 2495 hpsa_scsi_do_simple_cmd_core(h, c); 2496 hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL); 2497 check_ioctl_unit_attention(h, c); 2498 2499 /* Copy the error information out */ 2500 memcpy(&iocommand.error_info, c->err_info, 2501 sizeof(iocommand.error_info)); 2502 if (copy_to_user(argp, &iocommand, sizeof(iocommand))) { 2503 kfree(buff); 2504 cmd_special_free(h, c); 2505 return -EFAULT; 2506 } 2507 2508 if (iocommand.Request.Type.Direction == XFER_READ) { 2509 /* Copy the data out of the buffer we created */ 2510 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) { 2511 kfree(buff); 2512 cmd_special_free(h, c); 2513 return -EFAULT; 2514 } 2515 } 2516 kfree(buff); 2517 cmd_special_free(h, c); 2518 return 0; 2519 } 2520 2521 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp) 2522 { 2523 BIG_IOCTL_Command_struct *ioc; 2524 struct CommandList *c; 2525 unsigned char **buff = NULL; 2526 int *buff_size = NULL; 2527 union u64bit temp64; 2528 BYTE sg_used = 0; 2529 int status = 0; 2530 int i; 2531 u32 left; 2532 u32 sz; 2533 BYTE __user *data_ptr; 2534 2535 if (!argp) 2536 return -EINVAL; 2537 if (!capable(CAP_SYS_RAWIO)) 2538 return -EPERM; 2539 ioc = (BIG_IOCTL_Command_struct *) 2540 kmalloc(sizeof(*ioc), GFP_KERNEL); 2541 if (!ioc) { 2542 status = -ENOMEM; 2543 goto cleanup1; 2544 } 2545 if (copy_from_user(ioc, argp, sizeof(*ioc))) { 2546 status = -EFAULT; 2547 goto cleanup1; 2548 } 2549 if ((ioc->buf_size < 1) && 2550 (ioc->Request.Type.Direction != XFER_NONE)) { 2551 status = -EINVAL; 2552 goto cleanup1; 2553 } 2554 /* Check kmalloc limits using all SGs */ 2555 if (ioc->malloc_size > MAX_KMALLOC_SIZE) { 2556 status = -EINVAL; 2557 goto cleanup1; 2558 } 2559 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) { 2560 status = -EINVAL; 2561 goto cleanup1; 2562 } 2563 buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL); 2564 if (!buff) { 2565 status = -ENOMEM; 2566 goto cleanup1; 2567 } 2568 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL); 2569 if (!buff_size) { 2570 status = -ENOMEM; 2571 goto cleanup1; 2572 } 2573 left = ioc->buf_size; 2574 data_ptr = ioc->buf; 2575 while (left) { 2576 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left; 2577 buff_size[sg_used] = sz; 2578 buff[sg_used] = kmalloc(sz, GFP_KERNEL); 2579 if (buff[sg_used] == NULL) { 2580 status = -ENOMEM; 2581 goto cleanup1; 2582 } 2583 if (ioc->Request.Type.Direction == XFER_WRITE) { 2584 if (copy_from_user(buff[sg_used], data_ptr, sz)) { 2585 status = -ENOMEM; 2586 goto cleanup1; 2587 } 2588 } else 2589 memset(buff[sg_used], 0, sz); 2590 left -= sz; 2591 data_ptr += sz; 2592 sg_used++; 2593 } 2594 c = cmd_special_alloc(h); 2595 if (c == NULL) { 2596 status = -ENOMEM; 2597 goto cleanup1; 2598 } 2599 c->cmd_type = CMD_IOCTL_PEND; 2600 c->Header.ReplyQueue = 0; 2601 2602 if (ioc->buf_size > 0) { 2603 c->Header.SGList = sg_used; 2604 c->Header.SGTotal = sg_used; 2605 } else { 2606 c->Header.SGList = 0; 2607 c->Header.SGTotal = 0; 2608 } 2609 memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN)); 2610 c->Header.Tag.lower = c->busaddr; 2611 memcpy(&c->Request, &ioc->Request, sizeof(c->Request)); 2612 if (ioc->buf_size > 0) { 2613 int i; 2614 for (i = 0; i < sg_used; i++) { 2615 temp64.val = pci_map_single(h->pdev, buff[i], 2616 buff_size[i], PCI_DMA_BIDIRECTIONAL); 2617 c->SG[i].Addr.lower = temp64.val32.lower; 2618 c->SG[i].Addr.upper = temp64.val32.upper; 2619 c->SG[i].Len = buff_size[i]; 2620 /* we are not chaining */ 2621 c->SG[i].Ext = 0; 2622 } 2623 } 2624 hpsa_scsi_do_simple_cmd_core(h, c); 2625 hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL); 2626 check_ioctl_unit_attention(h, c); 2627 /* Copy the error information out */ 2628 memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info)); 2629 if (copy_to_user(argp, ioc, sizeof(*ioc))) { 2630 cmd_special_free(h, c); 2631 status = -EFAULT; 2632 goto cleanup1; 2633 } 2634 if (ioc->Request.Type.Direction == XFER_READ) { 2635 /* Copy the data out of the buffer we created */ 2636 BYTE __user *ptr = ioc->buf; 2637 for (i = 0; i < sg_used; i++) { 2638 if (copy_to_user(ptr, buff[i], buff_size[i])) { 2639 cmd_special_free(h, c); 2640 status = -EFAULT; 2641 goto cleanup1; 2642 } 2643 ptr += buff_size[i]; 2644 } 2645 } 2646 cmd_special_free(h, c); 2647 status = 0; 2648 cleanup1: 2649 if (buff) { 2650 for (i = 0; i < sg_used; i++) 2651 kfree(buff[i]); 2652 kfree(buff); 2653 } 2654 kfree(buff_size); 2655 kfree(ioc); 2656 return status; 2657 } 2658 2659 static void check_ioctl_unit_attention(struct ctlr_info *h, 2660 struct CommandList *c) 2661 { 2662 if (c->err_info->CommandStatus == CMD_TARGET_STATUS && 2663 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) 2664 (void) check_for_unit_attention(h, c); 2665 } 2666 /* 2667 * ioctl 2668 */ 2669 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg) 2670 { 2671 struct ctlr_info *h; 2672 void __user *argp = (void __user *)arg; 2673 2674 h = sdev_to_hba(dev); 2675 2676 switch (cmd) { 2677 case CCISS_DEREGDISK: 2678 case CCISS_REGNEWDISK: 2679 case CCISS_REGNEWD: 2680 hpsa_scan_start(h->scsi_host); 2681 return 0; 2682 case CCISS_GETPCIINFO: 2683 return hpsa_getpciinfo_ioctl(h, argp); 2684 case CCISS_GETDRIVVER: 2685 return hpsa_getdrivver_ioctl(h, argp); 2686 case CCISS_PASSTHRU: 2687 return hpsa_passthru_ioctl(h, argp); 2688 case CCISS_BIG_PASSTHRU: 2689 return hpsa_big_passthru_ioctl(h, argp); 2690 default: 2691 return -ENOTTY; 2692 } 2693 } 2694 2695 static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h, 2696 void *buff, size_t size, u8 page_code, unsigned char *scsi3addr, 2697 int cmd_type) 2698 { 2699 int pci_dir = XFER_NONE; 2700 2701 c->cmd_type = CMD_IOCTL_PEND; 2702 c->Header.ReplyQueue = 0; 2703 if (buff != NULL && size > 0) { 2704 c->Header.SGList = 1; 2705 c->Header.SGTotal = 1; 2706 } else { 2707 c->Header.SGList = 0; 2708 c->Header.SGTotal = 0; 2709 } 2710 c->Header.Tag.lower = c->busaddr; 2711 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); 2712 2713 c->Request.Type.Type = cmd_type; 2714 if (cmd_type == TYPE_CMD) { 2715 switch (cmd) { 2716 case HPSA_INQUIRY: 2717 /* are we trying to read a vital product page */ 2718 if (page_code != 0) { 2719 c->Request.CDB[1] = 0x01; 2720 c->Request.CDB[2] = page_code; 2721 } 2722 c->Request.CDBLen = 6; 2723 c->Request.Type.Attribute = ATTR_SIMPLE; 2724 c->Request.Type.Direction = XFER_READ; 2725 c->Request.Timeout = 0; 2726 c->Request.CDB[0] = HPSA_INQUIRY; 2727 c->Request.CDB[4] = size & 0xFF; 2728 break; 2729 case HPSA_REPORT_LOG: 2730 case HPSA_REPORT_PHYS: 2731 /* Talking to controller so It's a physical command 2732 mode = 00 target = 0. Nothing to write. 2733 */ 2734 c->Request.CDBLen = 12; 2735 c->Request.Type.Attribute = ATTR_SIMPLE; 2736 c->Request.Type.Direction = XFER_READ; 2737 c->Request.Timeout = 0; 2738 c->Request.CDB[0] = cmd; 2739 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */ 2740 c->Request.CDB[7] = (size >> 16) & 0xFF; 2741 c->Request.CDB[8] = (size >> 8) & 0xFF; 2742 c->Request.CDB[9] = size & 0xFF; 2743 break; 2744 case HPSA_CACHE_FLUSH: 2745 c->Request.CDBLen = 12; 2746 c->Request.Type.Attribute = ATTR_SIMPLE; 2747 c->Request.Type.Direction = XFER_WRITE; 2748 c->Request.Timeout = 0; 2749 c->Request.CDB[0] = BMIC_WRITE; 2750 c->Request.CDB[6] = BMIC_CACHE_FLUSH; 2751 break; 2752 case TEST_UNIT_READY: 2753 c->Request.CDBLen = 6; 2754 c->Request.Type.Attribute = ATTR_SIMPLE; 2755 c->Request.Type.Direction = XFER_NONE; 2756 c->Request.Timeout = 0; 2757 break; 2758 default: 2759 dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd); 2760 BUG(); 2761 return; 2762 } 2763 } else if (cmd_type == TYPE_MSG) { 2764 switch (cmd) { 2765 2766 case HPSA_DEVICE_RESET_MSG: 2767 c->Request.CDBLen = 16; 2768 c->Request.Type.Type = 1; /* It is a MSG not a CMD */ 2769 c->Request.Type.Attribute = ATTR_SIMPLE; 2770 c->Request.Type.Direction = XFER_NONE; 2771 c->Request.Timeout = 0; /* Don't time out */ 2772 c->Request.CDB[0] = 0x01; /* RESET_MSG is 0x01 */ 2773 c->Request.CDB[1] = 0x03; /* Reset target above */ 2774 /* If bytes 4-7 are zero, it means reset the */ 2775 /* LunID device */ 2776 c->Request.CDB[4] = 0x00; 2777 c->Request.CDB[5] = 0x00; 2778 c->Request.CDB[6] = 0x00; 2779 c->Request.CDB[7] = 0x00; 2780 break; 2781 2782 default: 2783 dev_warn(&h->pdev->dev, "unknown message type %d\n", 2784 cmd); 2785 BUG(); 2786 } 2787 } else { 2788 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type); 2789 BUG(); 2790 } 2791 2792 switch (c->Request.Type.Direction) { 2793 case XFER_READ: 2794 pci_dir = PCI_DMA_FROMDEVICE; 2795 break; 2796 case XFER_WRITE: 2797 pci_dir = PCI_DMA_TODEVICE; 2798 break; 2799 case XFER_NONE: 2800 pci_dir = PCI_DMA_NONE; 2801 break; 2802 default: 2803 pci_dir = PCI_DMA_BIDIRECTIONAL; 2804 } 2805 2806 hpsa_map_one(h->pdev, c, buff, size, pci_dir); 2807 2808 return; 2809 } 2810 2811 /* 2812 * Map (physical) PCI mem into (virtual) kernel space 2813 */ 2814 static void __iomem *remap_pci_mem(ulong base, ulong size) 2815 { 2816 ulong page_base = ((ulong) base) & PAGE_MASK; 2817 ulong page_offs = ((ulong) base) - page_base; 2818 void __iomem *page_remapped = ioremap(page_base, page_offs + size); 2819 2820 return page_remapped ? (page_remapped + page_offs) : NULL; 2821 } 2822 2823 /* Takes cmds off the submission queue and sends them to the hardware, 2824 * then puts them on the queue of cmds waiting for completion. 2825 */ 2826 static void start_io(struct ctlr_info *h) 2827 { 2828 struct CommandList *c; 2829 2830 while (!hlist_empty(&h->reqQ)) { 2831 c = hlist_entry(h->reqQ.first, struct CommandList, list); 2832 /* can't do anything if fifo is full */ 2833 if ((h->access.fifo_full(h))) { 2834 dev_warn(&h->pdev->dev, "fifo full\n"); 2835 break; 2836 } 2837 2838 /* Get the first entry from the Request Q */ 2839 removeQ(c); 2840 h->Qdepth--; 2841 2842 /* Tell the controller execute command */ 2843 h->access.submit_command(h, c); 2844 2845 /* Put job onto the completed Q */ 2846 addQ(&h->cmpQ, c); 2847 } 2848 } 2849 2850 static inline unsigned long get_next_completion(struct ctlr_info *h) 2851 { 2852 return h->access.command_completed(h); 2853 } 2854 2855 static inline bool interrupt_pending(struct ctlr_info *h) 2856 { 2857 return h->access.intr_pending(h); 2858 } 2859 2860 static inline long interrupt_not_for_us(struct ctlr_info *h) 2861 { 2862 return (h->access.intr_pending(h) == 0) || 2863 (h->interrupts_enabled == 0); 2864 } 2865 2866 static inline int bad_tag(struct ctlr_info *h, u32 tag_index, 2867 u32 raw_tag) 2868 { 2869 if (unlikely(tag_index >= h->nr_cmds)) { 2870 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag); 2871 return 1; 2872 } 2873 return 0; 2874 } 2875 2876 static inline void finish_cmd(struct CommandList *c, u32 raw_tag) 2877 { 2878 removeQ(c); 2879 if (likely(c->cmd_type == CMD_SCSI)) 2880 complete_scsi_command(c, 0, raw_tag); 2881 else if (c->cmd_type == CMD_IOCTL_PEND) 2882 complete(c->waiting); 2883 } 2884 2885 static inline u32 hpsa_tag_contains_index(u32 tag) 2886 { 2887 #define DIRECT_LOOKUP_BIT 0x10 2888 return tag & DIRECT_LOOKUP_BIT; 2889 } 2890 2891 static inline u32 hpsa_tag_to_index(u32 tag) 2892 { 2893 #define DIRECT_LOOKUP_SHIFT 5 2894 return tag >> DIRECT_LOOKUP_SHIFT; 2895 } 2896 2897 static inline u32 hpsa_tag_discard_error_bits(u32 tag) 2898 { 2899 #define HPSA_ERROR_BITS 0x03 2900 return tag & ~HPSA_ERROR_BITS; 2901 } 2902 2903 /* process completion of an indexed ("direct lookup") command */ 2904 static inline u32 process_indexed_cmd(struct ctlr_info *h, 2905 u32 raw_tag) 2906 { 2907 u32 tag_index; 2908 struct CommandList *c; 2909 2910 tag_index = hpsa_tag_to_index(raw_tag); 2911 if (bad_tag(h, tag_index, raw_tag)) 2912 return next_command(h); 2913 c = h->cmd_pool + tag_index; 2914 finish_cmd(c, raw_tag); 2915 return next_command(h); 2916 } 2917 2918 /* process completion of a non-indexed command */ 2919 static inline u32 process_nonindexed_cmd(struct ctlr_info *h, 2920 u32 raw_tag) 2921 { 2922 u32 tag; 2923 struct CommandList *c = NULL; 2924 struct hlist_node *tmp; 2925 2926 tag = hpsa_tag_discard_error_bits(raw_tag); 2927 hlist_for_each_entry(c, tmp, &h->cmpQ, list) { 2928 if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) { 2929 finish_cmd(c, raw_tag); 2930 return next_command(h); 2931 } 2932 } 2933 bad_tag(h, h->nr_cmds + 1, raw_tag); 2934 return next_command(h); 2935 } 2936 2937 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id) 2938 { 2939 struct ctlr_info *h = dev_id; 2940 unsigned long flags; 2941 u32 raw_tag; 2942 2943 if (interrupt_not_for_us(h)) 2944 return IRQ_NONE; 2945 spin_lock_irqsave(&h->lock, flags); 2946 while (interrupt_pending(h)) { 2947 raw_tag = get_next_completion(h); 2948 while (raw_tag != FIFO_EMPTY) { 2949 if (hpsa_tag_contains_index(raw_tag)) 2950 raw_tag = process_indexed_cmd(h, raw_tag); 2951 else 2952 raw_tag = process_nonindexed_cmd(h, raw_tag); 2953 } 2954 } 2955 spin_unlock_irqrestore(&h->lock, flags); 2956 return IRQ_HANDLED; 2957 } 2958 2959 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id) 2960 { 2961 struct ctlr_info *h = dev_id; 2962 unsigned long flags; 2963 u32 raw_tag; 2964 2965 spin_lock_irqsave(&h->lock, flags); 2966 raw_tag = get_next_completion(h); 2967 while (raw_tag != FIFO_EMPTY) { 2968 if (hpsa_tag_contains_index(raw_tag)) 2969 raw_tag = process_indexed_cmd(h, raw_tag); 2970 else 2971 raw_tag = process_nonindexed_cmd(h, raw_tag); 2972 } 2973 spin_unlock_irqrestore(&h->lock, flags); 2974 return IRQ_HANDLED; 2975 } 2976 2977 /* Send a message CDB to the firmware. */ 2978 static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode, 2979 unsigned char type) 2980 { 2981 struct Command { 2982 struct CommandListHeader CommandHeader; 2983 struct RequestBlock Request; 2984 struct ErrDescriptor ErrorDescriptor; 2985 }; 2986 struct Command *cmd; 2987 static const size_t cmd_sz = sizeof(*cmd) + 2988 sizeof(cmd->ErrorDescriptor); 2989 dma_addr_t paddr64; 2990 uint32_t paddr32, tag; 2991 void __iomem *vaddr; 2992 int i, err; 2993 2994 vaddr = pci_ioremap_bar(pdev, 0); 2995 if (vaddr == NULL) 2996 return -ENOMEM; 2997 2998 /* The Inbound Post Queue only accepts 32-bit physical addresses for the 2999 * CCISS commands, so they must be allocated from the lower 4GiB of 3000 * memory. 3001 */ 3002 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 3003 if (err) { 3004 iounmap(vaddr); 3005 return -ENOMEM; 3006 } 3007 3008 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); 3009 if (cmd == NULL) { 3010 iounmap(vaddr); 3011 return -ENOMEM; 3012 } 3013 3014 /* This must fit, because of the 32-bit consistent DMA mask. Also, 3015 * although there's no guarantee, we assume that the address is at 3016 * least 4-byte aligned (most likely, it's page-aligned). 3017 */ 3018 paddr32 = paddr64; 3019 3020 cmd->CommandHeader.ReplyQueue = 0; 3021 cmd->CommandHeader.SGList = 0; 3022 cmd->CommandHeader.SGTotal = 0; 3023 cmd->CommandHeader.Tag.lower = paddr32; 3024 cmd->CommandHeader.Tag.upper = 0; 3025 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); 3026 3027 cmd->Request.CDBLen = 16; 3028 cmd->Request.Type.Type = TYPE_MSG; 3029 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; 3030 cmd->Request.Type.Direction = XFER_NONE; 3031 cmd->Request.Timeout = 0; /* Don't time out */ 3032 cmd->Request.CDB[0] = opcode; 3033 cmd->Request.CDB[1] = type; 3034 memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */ 3035 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd); 3036 cmd->ErrorDescriptor.Addr.upper = 0; 3037 cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo); 3038 3039 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); 3040 3041 for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) { 3042 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); 3043 if (hpsa_tag_discard_error_bits(tag) == paddr32) 3044 break; 3045 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS); 3046 } 3047 3048 iounmap(vaddr); 3049 3050 /* we leak the DMA buffer here ... no choice since the controller could 3051 * still complete the command. 3052 */ 3053 if (i == HPSA_MSG_SEND_RETRY_LIMIT) { 3054 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n", 3055 opcode, type); 3056 return -ETIMEDOUT; 3057 } 3058 3059 pci_free_consistent(pdev, cmd_sz, cmd, paddr64); 3060 3061 if (tag & HPSA_ERROR_BIT) { 3062 dev_err(&pdev->dev, "controller message %02x:%02x failed\n", 3063 opcode, type); 3064 return -EIO; 3065 } 3066 3067 dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n", 3068 opcode, type); 3069 return 0; 3070 } 3071 3072 #define hpsa_soft_reset_controller(p) hpsa_message(p, 1, 0) 3073 #define hpsa_noop(p) hpsa_message(p, 3, 0) 3074 3075 static __devinit int hpsa_reset_msi(struct pci_dev *pdev) 3076 { 3077 /* the #defines are stolen from drivers/pci/msi.h. */ 3078 #define msi_control_reg(base) (base + PCI_MSI_FLAGS) 3079 #define PCI_MSIX_FLAGS_ENABLE (1 << 15) 3080 3081 int pos; 3082 u16 control = 0; 3083 3084 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI); 3085 if (pos) { 3086 pci_read_config_word(pdev, msi_control_reg(pos), &control); 3087 if (control & PCI_MSI_FLAGS_ENABLE) { 3088 dev_info(&pdev->dev, "resetting MSI\n"); 3089 pci_write_config_word(pdev, msi_control_reg(pos), 3090 control & ~PCI_MSI_FLAGS_ENABLE); 3091 } 3092 } 3093 3094 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX); 3095 if (pos) { 3096 pci_read_config_word(pdev, msi_control_reg(pos), &control); 3097 if (control & PCI_MSIX_FLAGS_ENABLE) { 3098 dev_info(&pdev->dev, "resetting MSI-X\n"); 3099 pci_write_config_word(pdev, msi_control_reg(pos), 3100 control & ~PCI_MSIX_FLAGS_ENABLE); 3101 } 3102 } 3103 3104 return 0; 3105 } 3106 3107 static int hpsa_controller_hard_reset(struct pci_dev *pdev, 3108 void * __iomem vaddr, bool use_doorbell) 3109 { 3110 u16 pmcsr; 3111 int pos; 3112 3113 if (use_doorbell) { 3114 /* For everything after the P600, the PCI power state method 3115 * of resetting the controller doesn't work, so we have this 3116 * other way using the doorbell register. 3117 */ 3118 dev_info(&pdev->dev, "using doorbell to reset controller\n"); 3119 writel(DOORBELL_CTLR_RESET, vaddr + SA5_DOORBELL); 3120 msleep(1000); 3121 } else { /* Try to do it the PCI power state way */ 3122 3123 /* Quoting from the Open CISS Specification: "The Power 3124 * Management Control/Status Register (CSR) controls the power 3125 * state of the device. The normal operating state is D0, 3126 * CSR=00h. The software off state is D3, CSR=03h. To reset 3127 * the controller, place the interface device in D3 then to D0, 3128 * this causes a secondary PCI reset which will reset the 3129 * controller." */ 3130 3131 pos = pci_find_capability(pdev, PCI_CAP_ID_PM); 3132 if (pos == 0) { 3133 dev_err(&pdev->dev, 3134 "hpsa_reset_controller: " 3135 "PCI PM not supported\n"); 3136 return -ENODEV; 3137 } 3138 dev_info(&pdev->dev, "using PCI PM to reset controller\n"); 3139 /* enter the D3hot power management state */ 3140 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); 3141 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 3142 pmcsr |= PCI_D3hot; 3143 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 3144 3145 msleep(500); 3146 3147 /* enter the D0 power management state */ 3148 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 3149 pmcsr |= PCI_D0; 3150 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); 3151 3152 msleep(500); 3153 } 3154 return 0; 3155 } 3156 3157 /* This does a hard reset of the controller using PCI power management 3158 * states or the using the doorbell register. 3159 */ 3160 static __devinit int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev) 3161 { 3162 u16 saved_config_space[32]; 3163 u64 cfg_offset; 3164 u32 cfg_base_addr; 3165 u64 cfg_base_addr_index; 3166 void __iomem *vaddr; 3167 unsigned long paddr; 3168 u32 misc_fw_support, active_transport; 3169 int rc, i; 3170 struct CfgTable __iomem *cfgtable; 3171 bool use_doorbell; 3172 u32 board_id; 3173 3174 /* For controllers as old as the P600, this is very nearly 3175 * the same thing as 3176 * 3177 * pci_save_state(pci_dev); 3178 * pci_set_power_state(pci_dev, PCI_D3hot); 3179 * pci_set_power_state(pci_dev, PCI_D0); 3180 * pci_restore_state(pci_dev); 3181 * 3182 * but we can't use these nice canned kernel routines on 3183 * kexec, because they also check the MSI/MSI-X state in PCI 3184 * configuration space and do the wrong thing when it is 3185 * set/cleared. Also, the pci_save/restore_state functions 3186 * violate the ordering requirements for restoring the 3187 * configuration space from the CCISS document (see the 3188 * comment below). So we roll our own .... 3189 * 3190 * For controllers newer than the P600, the pci power state 3191 * method of resetting doesn't work so we have another way 3192 * using the doorbell register. 3193 */ 3194 3195 /* Exclude 640x boards. These are two pci devices in one slot 3196 * which share a battery backed cache module. One controls the 3197 * cache, the other accesses the cache through the one that controls 3198 * it. If we reset the one controlling the cache, the other will 3199 * likely not be happy. Just forbid resetting this conjoined mess. 3200 * The 640x isn't really supported by hpsa anyway. 3201 */ 3202 hpsa_lookup_board_id(pdev, &board_id); 3203 if (board_id == 0x409C0E11 || board_id == 0x409D0E11) 3204 return -ENOTSUPP; 3205 3206 for (i = 0; i < 32; i++) 3207 pci_read_config_word(pdev, 2*i, &saved_config_space[i]); 3208 3209 3210 /* find the first memory BAR, so we can find the cfg table */ 3211 rc = hpsa_pci_find_memory_BAR(pdev, &paddr); 3212 if (rc) 3213 return rc; 3214 vaddr = remap_pci_mem(paddr, 0x250); 3215 if (!vaddr) 3216 return -ENOMEM; 3217 3218 /* find cfgtable in order to check if reset via doorbell is supported */ 3219 rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr, 3220 &cfg_base_addr_index, &cfg_offset); 3221 if (rc) 3222 goto unmap_vaddr; 3223 cfgtable = remap_pci_mem(pci_resource_start(pdev, 3224 cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable)); 3225 if (!cfgtable) { 3226 rc = -ENOMEM; 3227 goto unmap_vaddr; 3228 } 3229 3230 /* If reset via doorbell register is supported, use that. */ 3231 misc_fw_support = readl(&cfgtable->misc_fw_support); 3232 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET; 3233 3234 rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell); 3235 if (rc) 3236 goto unmap_cfgtable; 3237 3238 /* Restore the PCI configuration space. The Open CISS 3239 * Specification says, "Restore the PCI Configuration 3240 * Registers, offsets 00h through 60h. It is important to 3241 * restore the command register, 16-bits at offset 04h, 3242 * last. Do not restore the configuration status register, 3243 * 16-bits at offset 06h." Note that the offset is 2*i. 3244 */ 3245 for (i = 0; i < 32; i++) { 3246 if (i == 2 || i == 3) 3247 continue; 3248 pci_write_config_word(pdev, 2*i, saved_config_space[i]); 3249 } 3250 wmb(); 3251 pci_write_config_word(pdev, 4, saved_config_space[2]); 3252 3253 /* Some devices (notably the HP Smart Array 5i Controller) 3254 need a little pause here */ 3255 msleep(HPSA_POST_RESET_PAUSE_MSECS); 3256 3257 /* Controller should be in simple mode at this point. If it's not, 3258 * It means we're on one of those controllers which doesn't support 3259 * the doorbell reset method and on which the PCI power management reset 3260 * method doesn't work (P800, for example.) 3261 * In those cases, pretend the reset worked and hope for the best. 3262 */ 3263 active_transport = readl(&cfgtable->TransportActive); 3264 if (active_transport & PERFORMANT_MODE) { 3265 dev_warn(&pdev->dev, "Unable to successfully reset controller," 3266 " proceeding anyway.\n"); 3267 rc = -ENOTSUPP; 3268 } 3269 3270 unmap_cfgtable: 3271 iounmap(cfgtable); 3272 3273 unmap_vaddr: 3274 iounmap(vaddr); 3275 return rc; 3276 } 3277 3278 /* 3279 * We cannot read the structure directly, for portability we must use 3280 * the io functions. 3281 * This is for debug only. 3282 */ 3283 static void print_cfg_table(struct device *dev, struct CfgTable *tb) 3284 { 3285 #ifdef HPSA_DEBUG 3286 int i; 3287 char temp_name[17]; 3288 3289 dev_info(dev, "Controller Configuration information\n"); 3290 dev_info(dev, "------------------------------------\n"); 3291 for (i = 0; i < 4; i++) 3292 temp_name[i] = readb(&(tb->Signature[i])); 3293 temp_name[4] = '\0'; 3294 dev_info(dev, " Signature = %s\n", temp_name); 3295 dev_info(dev, " Spec Number = %d\n", readl(&(tb->SpecValence))); 3296 dev_info(dev, " Transport methods supported = 0x%x\n", 3297 readl(&(tb->TransportSupport))); 3298 dev_info(dev, " Transport methods active = 0x%x\n", 3299 readl(&(tb->TransportActive))); 3300 dev_info(dev, " Requested transport Method = 0x%x\n", 3301 readl(&(tb->HostWrite.TransportRequest))); 3302 dev_info(dev, " Coalesce Interrupt Delay = 0x%x\n", 3303 readl(&(tb->HostWrite.CoalIntDelay))); 3304 dev_info(dev, " Coalesce Interrupt Count = 0x%x\n", 3305 readl(&(tb->HostWrite.CoalIntCount))); 3306 dev_info(dev, " Max outstanding commands = 0x%d\n", 3307 readl(&(tb->CmdsOutMax))); 3308 dev_info(dev, " Bus Types = 0x%x\n", readl(&(tb->BusTypes))); 3309 for (i = 0; i < 16; i++) 3310 temp_name[i] = readb(&(tb->ServerName[i])); 3311 temp_name[16] = '\0'; 3312 dev_info(dev, " Server Name = %s\n", temp_name); 3313 dev_info(dev, " Heartbeat Counter = 0x%x\n\n\n", 3314 readl(&(tb->HeartBeat))); 3315 #endif /* HPSA_DEBUG */ 3316 } 3317 3318 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) 3319 { 3320 int i, offset, mem_type, bar_type; 3321 3322 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ 3323 return 0; 3324 offset = 0; 3325 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 3326 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; 3327 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) 3328 offset += 4; 3329 else { 3330 mem_type = pci_resource_flags(pdev, i) & 3331 PCI_BASE_ADDRESS_MEM_TYPE_MASK; 3332 switch (mem_type) { 3333 case PCI_BASE_ADDRESS_MEM_TYPE_32: 3334 case PCI_BASE_ADDRESS_MEM_TYPE_1M: 3335 offset += 4; /* 32 bit */ 3336 break; 3337 case PCI_BASE_ADDRESS_MEM_TYPE_64: 3338 offset += 8; 3339 break; 3340 default: /* reserved in PCI 2.2 */ 3341 dev_warn(&pdev->dev, 3342 "base address is invalid\n"); 3343 return -1; 3344 break; 3345 } 3346 } 3347 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) 3348 return i + 1; 3349 } 3350 return -1; 3351 } 3352 3353 /* If MSI/MSI-X is supported by the kernel we will try to enable it on 3354 * controllers that are capable. If not, we use IO-APIC mode. 3355 */ 3356 3357 static void __devinit hpsa_interrupt_mode(struct ctlr_info *h) 3358 { 3359 #ifdef CONFIG_PCI_MSI 3360 int err; 3361 struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1}, 3362 {0, 2}, {0, 3} 3363 }; 3364 3365 /* Some boards advertise MSI but don't really support it */ 3366 if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) || 3367 (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11)) 3368 goto default_int_mode; 3369 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) { 3370 dev_info(&h->pdev->dev, "MSIX\n"); 3371 err = pci_enable_msix(h->pdev, hpsa_msix_entries, 4); 3372 if (!err) { 3373 h->intr[0] = hpsa_msix_entries[0].vector; 3374 h->intr[1] = hpsa_msix_entries[1].vector; 3375 h->intr[2] = hpsa_msix_entries[2].vector; 3376 h->intr[3] = hpsa_msix_entries[3].vector; 3377 h->msix_vector = 1; 3378 return; 3379 } 3380 if (err > 0) { 3381 dev_warn(&h->pdev->dev, "only %d MSI-X vectors " 3382 "available\n", err); 3383 goto default_int_mode; 3384 } else { 3385 dev_warn(&h->pdev->dev, "MSI-X init failed %d\n", 3386 err); 3387 goto default_int_mode; 3388 } 3389 } 3390 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) { 3391 dev_info(&h->pdev->dev, "MSI\n"); 3392 if (!pci_enable_msi(h->pdev)) 3393 h->msi_vector = 1; 3394 else 3395 dev_warn(&h->pdev->dev, "MSI init failed\n"); 3396 } 3397 default_int_mode: 3398 #endif /* CONFIG_PCI_MSI */ 3399 /* if we get here we're going to use the default interrupt mode */ 3400 h->intr[PERF_MODE_INT] = h->pdev->irq; 3401 } 3402 3403 static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id) 3404 { 3405 int i; 3406 u32 subsystem_vendor_id, subsystem_device_id; 3407 3408 subsystem_vendor_id = pdev->subsystem_vendor; 3409 subsystem_device_id = pdev->subsystem_device; 3410 *board_id = ((subsystem_device_id << 16) & 0xffff0000) | 3411 subsystem_vendor_id; 3412 3413 for (i = 0; i < ARRAY_SIZE(products); i++) 3414 if (*board_id == products[i].board_id) 3415 return i; 3416 3417 if ((subsystem_vendor_id != PCI_VENDOR_ID_HP && 3418 subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) || 3419 !hpsa_allow_any) { 3420 dev_warn(&pdev->dev, "unrecognized board ID: " 3421 "0x%08x, ignoring.\n", *board_id); 3422 return -ENODEV; 3423 } 3424 return ARRAY_SIZE(products) - 1; /* generic unknown smart array */ 3425 } 3426 3427 static inline bool hpsa_board_disabled(struct pci_dev *pdev) 3428 { 3429 u16 command; 3430 3431 (void) pci_read_config_word(pdev, PCI_COMMAND, &command); 3432 return ((command & PCI_COMMAND_MEMORY) == 0); 3433 } 3434 3435 static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev, 3436 unsigned long *memory_bar) 3437 { 3438 int i; 3439 3440 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) 3441 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) { 3442 /* addressing mode bits already removed */ 3443 *memory_bar = pci_resource_start(pdev, i); 3444 dev_dbg(&pdev->dev, "memory BAR = %lx\n", 3445 *memory_bar); 3446 return 0; 3447 } 3448 dev_warn(&pdev->dev, "no memory BAR found\n"); 3449 return -ENODEV; 3450 } 3451 3452 static int __devinit hpsa_wait_for_board_ready(struct ctlr_info *h) 3453 { 3454 int i; 3455 u32 scratchpad; 3456 3457 for (i = 0; i < HPSA_BOARD_READY_ITERATIONS; i++) { 3458 scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET); 3459 if (scratchpad == HPSA_FIRMWARE_READY) 3460 return 0; 3461 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS); 3462 } 3463 dev_warn(&h->pdev->dev, "board not ready, timed out.\n"); 3464 return -ENODEV; 3465 } 3466 3467 static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev, 3468 void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index, 3469 u64 *cfg_offset) 3470 { 3471 *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET); 3472 *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET); 3473 *cfg_base_addr &= (u32) 0x0000ffff; 3474 *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr); 3475 if (*cfg_base_addr_index == -1) { 3476 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n"); 3477 return -ENODEV; 3478 } 3479 return 0; 3480 } 3481 3482 static int __devinit hpsa_find_cfgtables(struct ctlr_info *h) 3483 { 3484 u64 cfg_offset; 3485 u32 cfg_base_addr; 3486 u64 cfg_base_addr_index; 3487 u32 trans_offset; 3488 int rc; 3489 3490 rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr, 3491 &cfg_base_addr_index, &cfg_offset); 3492 if (rc) 3493 return rc; 3494 h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev, 3495 cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable)); 3496 if (!h->cfgtable) 3497 return -ENOMEM; 3498 /* Find performant mode table. */ 3499 trans_offset = readl(&h->cfgtable->TransMethodOffset); 3500 h->transtable = remap_pci_mem(pci_resource_start(h->pdev, 3501 cfg_base_addr_index)+cfg_offset+trans_offset, 3502 sizeof(*h->transtable)); 3503 if (!h->transtable) 3504 return -ENOMEM; 3505 return 0; 3506 } 3507 3508 static void __devinit hpsa_get_max_perf_mode_cmds(struct ctlr_info *h) 3509 { 3510 h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands)); 3511 if (h->max_commands < 16) { 3512 dev_warn(&h->pdev->dev, "Controller reports " 3513 "max supported commands of %d, an obvious lie. " 3514 "Using 16. Ensure that firmware is up to date.\n", 3515 h->max_commands); 3516 h->max_commands = 16; 3517 } 3518 } 3519 3520 /* Interrogate the hardware for some limits: 3521 * max commands, max SG elements without chaining, and with chaining, 3522 * SG chain block size, etc. 3523 */ 3524 static void __devinit hpsa_find_board_params(struct ctlr_info *h) 3525 { 3526 hpsa_get_max_perf_mode_cmds(h); 3527 h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */ 3528 h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements)); 3529 /* 3530 * Limit in-command s/g elements to 32 save dma'able memory. 3531 * Howvever spec says if 0, use 31 3532 */ 3533 h->max_cmd_sg_entries = 31; 3534 if (h->maxsgentries > 512) { 3535 h->max_cmd_sg_entries = 32; 3536 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1; 3537 h->maxsgentries--; /* save one for chain pointer */ 3538 } else { 3539 h->maxsgentries = 31; /* default to traditional values */ 3540 h->chainsize = 0; 3541 } 3542 } 3543 3544 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h) 3545 { 3546 if ((readb(&h->cfgtable->Signature[0]) != 'C') || 3547 (readb(&h->cfgtable->Signature[1]) != 'I') || 3548 (readb(&h->cfgtable->Signature[2]) != 'S') || 3549 (readb(&h->cfgtable->Signature[3]) != 'S')) { 3550 dev_warn(&h->pdev->dev, "not a valid CISS config table\n"); 3551 return false; 3552 } 3553 return true; 3554 } 3555 3556 /* Need to enable prefetch in the SCSI core for 6400 in x86 */ 3557 static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h) 3558 { 3559 #ifdef CONFIG_X86 3560 u32 prefetch; 3561 3562 prefetch = readl(&(h->cfgtable->SCSI_Prefetch)); 3563 prefetch |= 0x100; 3564 writel(prefetch, &(h->cfgtable->SCSI_Prefetch)); 3565 #endif 3566 } 3567 3568 /* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result 3569 * in a prefetch beyond physical memory. 3570 */ 3571 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h) 3572 { 3573 u32 dma_prefetch; 3574 3575 if (h->board_id != 0x3225103C) 3576 return; 3577 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG); 3578 dma_prefetch |= 0x8000; 3579 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG); 3580 } 3581 3582 static void __devinit hpsa_wait_for_mode_change_ack(struct ctlr_info *h) 3583 { 3584 int i; 3585 3586 /* under certain very rare conditions, this can take awhile. 3587 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right 3588 * as we enter this code.) 3589 */ 3590 for (i = 0; i < MAX_CONFIG_WAIT; i++) { 3591 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) 3592 break; 3593 /* delay and try again */ 3594 msleep(10); 3595 } 3596 } 3597 3598 static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h) 3599 { 3600 u32 trans_support; 3601 3602 trans_support = readl(&(h->cfgtable->TransportSupport)); 3603 if (!(trans_support & SIMPLE_MODE)) 3604 return -ENOTSUPP; 3605 3606 h->max_commands = readl(&(h->cfgtable->CmdsOutMax)); 3607 /* Update the field, and then ring the doorbell */ 3608 writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest)); 3609 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); 3610 hpsa_wait_for_mode_change_ack(h); 3611 print_cfg_table(&h->pdev->dev, h->cfgtable); 3612 if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) { 3613 dev_warn(&h->pdev->dev, 3614 "unable to get board into simple mode\n"); 3615 return -ENODEV; 3616 } 3617 return 0; 3618 } 3619 3620 static int __devinit hpsa_pci_init(struct ctlr_info *h) 3621 { 3622 int prod_index, err; 3623 3624 prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id); 3625 if (prod_index < 0) 3626 return -ENODEV; 3627 h->product_name = products[prod_index].product_name; 3628 h->access = *(products[prod_index].access); 3629 3630 if (hpsa_board_disabled(h->pdev)) { 3631 dev_warn(&h->pdev->dev, "controller appears to be disabled\n"); 3632 return -ENODEV; 3633 } 3634 err = pci_enable_device(h->pdev); 3635 if (err) { 3636 dev_warn(&h->pdev->dev, "unable to enable PCI device\n"); 3637 return err; 3638 } 3639 3640 err = pci_request_regions(h->pdev, "hpsa"); 3641 if (err) { 3642 dev_err(&h->pdev->dev, 3643 "cannot obtain PCI resources, aborting\n"); 3644 return err; 3645 } 3646 hpsa_interrupt_mode(h); 3647 err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr); 3648 if (err) 3649 goto err_out_free_res; 3650 h->vaddr = remap_pci_mem(h->paddr, 0x250); 3651 if (!h->vaddr) { 3652 err = -ENOMEM; 3653 goto err_out_free_res; 3654 } 3655 err = hpsa_wait_for_board_ready(h); 3656 if (err) 3657 goto err_out_free_res; 3658 err = hpsa_find_cfgtables(h); 3659 if (err) 3660 goto err_out_free_res; 3661 hpsa_find_board_params(h); 3662 3663 if (!hpsa_CISS_signature_present(h)) { 3664 err = -ENODEV; 3665 goto err_out_free_res; 3666 } 3667 hpsa_enable_scsi_prefetch(h); 3668 hpsa_p600_dma_prefetch_quirk(h); 3669 err = hpsa_enter_simple_mode(h); 3670 if (err) 3671 goto err_out_free_res; 3672 return 0; 3673 3674 err_out_free_res: 3675 if (h->transtable) 3676 iounmap(h->transtable); 3677 if (h->cfgtable) 3678 iounmap(h->cfgtable); 3679 if (h->vaddr) 3680 iounmap(h->vaddr); 3681 /* 3682 * Deliberately omit pci_disable_device(): it does something nasty to 3683 * Smart Array controllers that pci_enable_device does not undo 3684 */ 3685 pci_release_regions(h->pdev); 3686 return err; 3687 } 3688 3689 static void __devinit hpsa_hba_inquiry(struct ctlr_info *h) 3690 { 3691 int rc; 3692 3693 #define HBA_INQUIRY_BYTE_COUNT 64 3694 h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL); 3695 if (!h->hba_inquiry_data) 3696 return; 3697 rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0, 3698 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT); 3699 if (rc != 0) { 3700 kfree(h->hba_inquiry_data); 3701 h->hba_inquiry_data = NULL; 3702 } 3703 } 3704 3705 static __devinit int hpsa_init_reset_devices(struct pci_dev *pdev) 3706 { 3707 int rc, i; 3708 3709 if (!reset_devices) 3710 return 0; 3711 3712 /* Reset the controller with a PCI power-cycle or via doorbell */ 3713 rc = hpsa_kdump_hard_reset_controller(pdev); 3714 3715 /* -ENOTSUPP here means we cannot reset the controller 3716 * but it's already (and still) up and running in 3717 * "performant mode". Or, it might be 640x, which can't reset 3718 * due to concerns about shared bbwc between 6402/6404 pair. 3719 */ 3720 if (rc == -ENOTSUPP) 3721 return 0; /* just try to do the kdump anyhow. */ 3722 if (rc) 3723 return -ENODEV; 3724 if (hpsa_reset_msi(pdev)) 3725 return -ENODEV; 3726 3727 /* Now try to get the controller to respond to a no-op */ 3728 for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) { 3729 if (hpsa_noop(pdev) == 0) 3730 break; 3731 else 3732 dev_warn(&pdev->dev, "no-op failed%s\n", 3733 (i < 11 ? "; re-trying" : "")); 3734 } 3735 return 0; 3736 } 3737 3738 static int __devinit hpsa_init_one(struct pci_dev *pdev, 3739 const struct pci_device_id *ent) 3740 { 3741 int dac, rc; 3742 struct ctlr_info *h; 3743 3744 if (number_of_controllers == 0) 3745 printk(KERN_INFO DRIVER_NAME "\n"); 3746 3747 rc = hpsa_init_reset_devices(pdev); 3748 if (rc) 3749 return rc; 3750 3751 /* Command structures must be aligned on a 32-byte boundary because 3752 * the 5 lower bits of the address are used by the hardware. and by 3753 * the driver. See comments in hpsa.h for more info. 3754 */ 3755 #define COMMANDLIST_ALIGNMENT 32 3756 BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT); 3757 h = kzalloc(sizeof(*h), GFP_KERNEL); 3758 if (!h) 3759 return -ENOMEM; 3760 3761 h->pdev = pdev; 3762 h->busy_initializing = 1; 3763 INIT_HLIST_HEAD(&h->cmpQ); 3764 INIT_HLIST_HEAD(&h->reqQ); 3765 rc = hpsa_pci_init(h); 3766 if (rc != 0) 3767 goto clean1; 3768 3769 sprintf(h->devname, "hpsa%d", number_of_controllers); 3770 h->ctlr = number_of_controllers; 3771 number_of_controllers++; 3772 3773 /* configure PCI DMA stuff */ 3774 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 3775 if (rc == 0) { 3776 dac = 1; 3777 } else { 3778 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 3779 if (rc == 0) { 3780 dac = 0; 3781 } else { 3782 dev_err(&pdev->dev, "no suitable DMA available\n"); 3783 goto clean1; 3784 } 3785 } 3786 3787 /* make sure the board interrupts are off */ 3788 h->access.set_intr_mask(h, HPSA_INTR_OFF); 3789 3790 if (h->msix_vector || h->msi_vector) 3791 rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr_msi, 3792 IRQF_DISABLED, h->devname, h); 3793 else 3794 rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr_intx, 3795 IRQF_DISABLED, h->devname, h); 3796 if (rc) { 3797 dev_err(&pdev->dev, "unable to get irq %d for %s\n", 3798 h->intr[PERF_MODE_INT], h->devname); 3799 goto clean2; 3800 } 3801 3802 dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n", 3803 h->devname, pdev->device, 3804 h->intr[PERF_MODE_INT], dac ? "" : " not"); 3805 3806 h->cmd_pool_bits = 3807 kmalloc(((h->nr_cmds + BITS_PER_LONG - 3808 1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL); 3809 h->cmd_pool = pci_alloc_consistent(h->pdev, 3810 h->nr_cmds * sizeof(*h->cmd_pool), 3811 &(h->cmd_pool_dhandle)); 3812 h->errinfo_pool = pci_alloc_consistent(h->pdev, 3813 h->nr_cmds * sizeof(*h->errinfo_pool), 3814 &(h->errinfo_pool_dhandle)); 3815 if ((h->cmd_pool_bits == NULL) 3816 || (h->cmd_pool == NULL) 3817 || (h->errinfo_pool == NULL)) { 3818 dev_err(&pdev->dev, "out of memory"); 3819 rc = -ENOMEM; 3820 goto clean4; 3821 } 3822 if (hpsa_allocate_sg_chain_blocks(h)) 3823 goto clean4; 3824 spin_lock_init(&h->lock); 3825 spin_lock_init(&h->scan_lock); 3826 init_waitqueue_head(&h->scan_wait_queue); 3827 h->scan_finished = 1; /* no scan currently in progress */ 3828 3829 pci_set_drvdata(pdev, h); 3830 memset(h->cmd_pool_bits, 0, 3831 ((h->nr_cmds + BITS_PER_LONG - 3832 1) / BITS_PER_LONG) * sizeof(unsigned long)); 3833 3834 hpsa_scsi_setup(h); 3835 3836 /* Turn the interrupts on so we can service requests */ 3837 h->access.set_intr_mask(h, HPSA_INTR_ON); 3838 3839 hpsa_put_ctlr_into_performant_mode(h); 3840 hpsa_hba_inquiry(h); 3841 hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */ 3842 h->busy_initializing = 0; 3843 return 1; 3844 3845 clean4: 3846 hpsa_free_sg_chain_blocks(h); 3847 kfree(h->cmd_pool_bits); 3848 if (h->cmd_pool) 3849 pci_free_consistent(h->pdev, 3850 h->nr_cmds * sizeof(struct CommandList), 3851 h->cmd_pool, h->cmd_pool_dhandle); 3852 if (h->errinfo_pool) 3853 pci_free_consistent(h->pdev, 3854 h->nr_cmds * sizeof(struct ErrorInfo), 3855 h->errinfo_pool, 3856 h->errinfo_pool_dhandle); 3857 free_irq(h->intr[PERF_MODE_INT], h); 3858 clean2: 3859 clean1: 3860 h->busy_initializing = 0; 3861 kfree(h); 3862 return rc; 3863 } 3864 3865 static void hpsa_flush_cache(struct ctlr_info *h) 3866 { 3867 char *flush_buf; 3868 struct CommandList *c; 3869 3870 flush_buf = kzalloc(4, GFP_KERNEL); 3871 if (!flush_buf) 3872 return; 3873 3874 c = cmd_special_alloc(h); 3875 if (!c) { 3876 dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n"); 3877 goto out_of_memory; 3878 } 3879 fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0, 3880 RAID_CTLR_LUNID, TYPE_CMD); 3881 hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE); 3882 if (c->err_info->CommandStatus != 0) 3883 dev_warn(&h->pdev->dev, 3884 "error flushing cache on controller\n"); 3885 cmd_special_free(h, c); 3886 out_of_memory: 3887 kfree(flush_buf); 3888 } 3889 3890 static void hpsa_shutdown(struct pci_dev *pdev) 3891 { 3892 struct ctlr_info *h; 3893 3894 h = pci_get_drvdata(pdev); 3895 /* Turn board interrupts off and send the flush cache command 3896 * sendcmd will turn off interrupt, and send the flush... 3897 * To write all data in the battery backed cache to disks 3898 */ 3899 hpsa_flush_cache(h); 3900 h->access.set_intr_mask(h, HPSA_INTR_OFF); 3901 free_irq(h->intr[PERF_MODE_INT], h); 3902 #ifdef CONFIG_PCI_MSI 3903 if (h->msix_vector) 3904 pci_disable_msix(h->pdev); 3905 else if (h->msi_vector) 3906 pci_disable_msi(h->pdev); 3907 #endif /* CONFIG_PCI_MSI */ 3908 } 3909 3910 static void __devexit hpsa_remove_one(struct pci_dev *pdev) 3911 { 3912 struct ctlr_info *h; 3913 3914 if (pci_get_drvdata(pdev) == NULL) { 3915 dev_err(&pdev->dev, "unable to remove device \n"); 3916 return; 3917 } 3918 h = pci_get_drvdata(pdev); 3919 hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */ 3920 hpsa_shutdown(pdev); 3921 iounmap(h->vaddr); 3922 iounmap(h->transtable); 3923 iounmap(h->cfgtable); 3924 hpsa_free_sg_chain_blocks(h); 3925 pci_free_consistent(h->pdev, 3926 h->nr_cmds * sizeof(struct CommandList), 3927 h->cmd_pool, h->cmd_pool_dhandle); 3928 pci_free_consistent(h->pdev, 3929 h->nr_cmds * sizeof(struct ErrorInfo), 3930 h->errinfo_pool, h->errinfo_pool_dhandle); 3931 pci_free_consistent(h->pdev, h->reply_pool_size, 3932 h->reply_pool, h->reply_pool_dhandle); 3933 kfree(h->cmd_pool_bits); 3934 kfree(h->blockFetchTable); 3935 kfree(h->hba_inquiry_data); 3936 /* 3937 * Deliberately omit pci_disable_device(): it does something nasty to 3938 * Smart Array controllers that pci_enable_device does not undo 3939 */ 3940 pci_release_regions(pdev); 3941 pci_set_drvdata(pdev, NULL); 3942 kfree(h); 3943 } 3944 3945 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev, 3946 __attribute__((unused)) pm_message_t state) 3947 { 3948 return -ENOSYS; 3949 } 3950 3951 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev) 3952 { 3953 return -ENOSYS; 3954 } 3955 3956 static struct pci_driver hpsa_pci_driver = { 3957 .name = "hpsa", 3958 .probe = hpsa_init_one, 3959 .remove = __devexit_p(hpsa_remove_one), 3960 .id_table = hpsa_pci_device_id, /* id_table */ 3961 .shutdown = hpsa_shutdown, 3962 .suspend = hpsa_suspend, 3963 .resume = hpsa_resume, 3964 }; 3965 3966 /* Fill in bucket_map[], given nsgs (the max number of 3967 * scatter gather elements supported) and bucket[], 3968 * which is an array of 8 integers. The bucket[] array 3969 * contains 8 different DMA transfer sizes (in 16 3970 * byte increments) which the controller uses to fetch 3971 * commands. This function fills in bucket_map[], which 3972 * maps a given number of scatter gather elements to one of 3973 * the 8 DMA transfer sizes. The point of it is to allow the 3974 * controller to only do as much DMA as needed to fetch the 3975 * command, with the DMA transfer size encoded in the lower 3976 * bits of the command address. 3977 */ 3978 static void calc_bucket_map(int bucket[], int num_buckets, 3979 int nsgs, int *bucket_map) 3980 { 3981 int i, j, b, size; 3982 3983 /* even a command with 0 SGs requires 4 blocks */ 3984 #define MINIMUM_TRANSFER_BLOCKS 4 3985 #define NUM_BUCKETS 8 3986 /* Note, bucket_map must have nsgs+1 entries. */ 3987 for (i = 0; i <= nsgs; i++) { 3988 /* Compute size of a command with i SG entries */ 3989 size = i + MINIMUM_TRANSFER_BLOCKS; 3990 b = num_buckets; /* Assume the biggest bucket */ 3991 /* Find the bucket that is just big enough */ 3992 for (j = 0; j < 8; j++) { 3993 if (bucket[j] >= size) { 3994 b = j; 3995 break; 3996 } 3997 } 3998 /* for a command with i SG entries, use bucket b. */ 3999 bucket_map[i] = b; 4000 } 4001 } 4002 4003 static __devinit void hpsa_enter_performant_mode(struct ctlr_info *h) 4004 { 4005 int i; 4006 unsigned long register_value; 4007 4008 /* This is a bit complicated. There are 8 registers on 4009 * the controller which we write to to tell it 8 different 4010 * sizes of commands which there may be. It's a way of 4011 * reducing the DMA done to fetch each command. Encoded into 4012 * each command's tag are 3 bits which communicate to the controller 4013 * which of the eight sizes that command fits within. The size of 4014 * each command depends on how many scatter gather entries there are. 4015 * Each SG entry requires 16 bytes. The eight registers are programmed 4016 * with the number of 16-byte blocks a command of that size requires. 4017 * The smallest command possible requires 5 such 16 byte blocks. 4018 * the largest command possible requires MAXSGENTRIES + 4 16-byte 4019 * blocks. Note, this only extends to the SG entries contained 4020 * within the command block, and does not extend to chained blocks 4021 * of SG elements. bft[] contains the eight values we write to 4022 * the registers. They are not evenly distributed, but have more 4023 * sizes for small commands, and fewer sizes for larger commands. 4024 */ 4025 int bft[8] = {5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4}; 4026 BUILD_BUG_ON(28 > MAXSGENTRIES + 4); 4027 /* 5 = 1 s/g entry or 4k 4028 * 6 = 2 s/g entry or 8k 4029 * 8 = 4 s/g entry or 16k 4030 * 10 = 6 s/g entry or 24k 4031 */ 4032 4033 h->reply_pool_wraparound = 1; /* spec: init to 1 */ 4034 4035 /* Controller spec: zero out this buffer. */ 4036 memset(h->reply_pool, 0, h->reply_pool_size); 4037 h->reply_pool_head = h->reply_pool; 4038 4039 bft[7] = h->max_sg_entries + 4; 4040 calc_bucket_map(bft, ARRAY_SIZE(bft), 32, h->blockFetchTable); 4041 for (i = 0; i < 8; i++) 4042 writel(bft[i], &h->transtable->BlockFetch[i]); 4043 4044 /* size of controller ring buffer */ 4045 writel(h->max_commands, &h->transtable->RepQSize); 4046 writel(1, &h->transtable->RepQCount); 4047 writel(0, &h->transtable->RepQCtrAddrLow32); 4048 writel(0, &h->transtable->RepQCtrAddrHigh32); 4049 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32); 4050 writel(0, &h->transtable->RepQAddr0High32); 4051 writel(CFGTBL_Trans_Performant, 4052 &(h->cfgtable->HostWrite.TransportRequest)); 4053 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); 4054 hpsa_wait_for_mode_change_ack(h); 4055 register_value = readl(&(h->cfgtable->TransportActive)); 4056 if (!(register_value & CFGTBL_Trans_Performant)) { 4057 dev_warn(&h->pdev->dev, "unable to get board into" 4058 " performant mode\n"); 4059 return; 4060 } 4061 } 4062 4063 static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h) 4064 { 4065 u32 trans_support; 4066 4067 trans_support = readl(&(h->cfgtable->TransportSupport)); 4068 if (!(trans_support & PERFORMANT_MODE)) 4069 return; 4070 4071 hpsa_get_max_perf_mode_cmds(h); 4072 h->max_sg_entries = 32; 4073 /* Performant mode ring buffer and supporting data structures */ 4074 h->reply_pool_size = h->max_commands * sizeof(u64); 4075 h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size, 4076 &(h->reply_pool_dhandle)); 4077 4078 /* Need a block fetch table for performant mode */ 4079 h->blockFetchTable = kmalloc(((h->max_sg_entries+1) * 4080 sizeof(u32)), GFP_KERNEL); 4081 4082 if ((h->reply_pool == NULL) 4083 || (h->blockFetchTable == NULL)) 4084 goto clean_up; 4085 4086 hpsa_enter_performant_mode(h); 4087 4088 /* Change the access methods to the performant access methods */ 4089 h->access = SA5_performant_access; 4090 h->transMethod = CFGTBL_Trans_Performant; 4091 4092 return; 4093 4094 clean_up: 4095 if (h->reply_pool) 4096 pci_free_consistent(h->pdev, h->reply_pool_size, 4097 h->reply_pool, h->reply_pool_dhandle); 4098 kfree(h->blockFetchTable); 4099 } 4100 4101 /* 4102 * This is it. Register the PCI driver information for the cards we control 4103 * the OS will call our registered routines when it finds one of our cards. 4104 */ 4105 static int __init hpsa_init(void) 4106 { 4107 return pci_register_driver(&hpsa_pci_driver); 4108 } 4109 4110 static void __exit hpsa_cleanup(void) 4111 { 4112 pci_unregister_driver(&hpsa_pci_driver); 4113 } 4114 4115 module_init(hpsa_init); 4116 module_exit(hpsa_cleanup); 4117