cciss_scsi.c revision 6b4d96b878d67c6768766e682c188a2a8bdc804a
1/* 2 * Disk Array driver for HP Smart Array controllers, SCSI Tape module. 3 * (C) Copyright 2001, 2007 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. See the GNU 12 * 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., 59 Temple Place, Suite 300, Boston, MA 17 * 02111-1307, USA. 18 * 19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com 20 * 21 * Author: Stephen M. Cameron 22 */ 23#ifdef CONFIG_CISS_SCSI_TAPE 24 25/* Here we have code to present the driver as a scsi driver 26 as it is simultaneously presented as a block driver. The 27 reason for doing this is to allow access to SCSI tape drives 28 through the array controller. Note in particular, neither 29 physical nor logical disks are presented through the scsi layer. */ 30 31#include <linux/timer.h> 32#include <linux/completion.h> 33#include <linux/slab.h> 34#include <linux/string.h> 35 36#include <asm/atomic.h> 37 38#include <scsi/scsi_cmnd.h> 39#include <scsi/scsi_device.h> 40#include <scsi/scsi_host.h> 41 42#include "cciss_scsi.h" 43 44#define CCISS_ABORT_MSG 0x00 45#define CCISS_RESET_MSG 0x01 46 47static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff, 48 size_t size, 49 __u8 page_code, unsigned char *scsi3addr, 50 int cmd_type); 51 52static CommandList_struct *cmd_alloc(ctlr_info_t *h); 53static CommandList_struct *cmd_special_alloc(ctlr_info_t *h); 54static void cmd_free(ctlr_info_t *h, CommandList_struct *c); 55static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c); 56 57static int cciss_scsi_proc_info( 58 struct Scsi_Host *sh, 59 char *buffer, /* data buffer */ 60 char **start, /* where data in buffer starts */ 61 off_t offset, /* offset from start of imaginary file */ 62 int length, /* length of data in buffer */ 63 int func); /* 0 == read, 1 == write */ 64 65static int cciss_scsi_queue_command (struct scsi_cmnd *cmd, 66 void (* done)(struct scsi_cmnd *)); 67static int cciss_eh_device_reset_handler(struct scsi_cmnd *); 68static int cciss_eh_abort_handler(struct scsi_cmnd *); 69 70static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { 71 { .name = "cciss0", .ndevices = 0 }, 72 { .name = "cciss1", .ndevices = 0 }, 73 { .name = "cciss2", .ndevices = 0 }, 74 { .name = "cciss3", .ndevices = 0 }, 75 { .name = "cciss4", .ndevices = 0 }, 76 { .name = "cciss5", .ndevices = 0 }, 77 { .name = "cciss6", .ndevices = 0 }, 78 { .name = "cciss7", .ndevices = 0 }, 79}; 80 81static struct scsi_host_template cciss_driver_template = { 82 .module = THIS_MODULE, 83 .name = "cciss", 84 .proc_name = "cciss", 85 .proc_info = cciss_scsi_proc_info, 86 .queuecommand = cciss_scsi_queue_command, 87 .can_queue = SCSI_CCISS_CAN_QUEUE, 88 .this_id = 7, 89 .cmd_per_lun = 1, 90 .use_clustering = DISABLE_CLUSTERING, 91 /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ 92 .eh_device_reset_handler= cciss_eh_device_reset_handler, 93 .eh_abort_handler = cciss_eh_abort_handler, 94}; 95 96#pragma pack(1) 97 98#define SCSI_PAD_32 8 99#define SCSI_PAD_64 8 100 101struct cciss_scsi_cmd_stack_elem_t { 102 CommandList_struct cmd; 103 ErrorInfo_struct Err; 104 __u32 busaddr; 105 int cmdindex; 106 u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64]; 107}; 108 109#pragma pack() 110 111#define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \ 112 CCISS_MAX_SCSI_DEVS_PER_HBA + 2) 113 // plus two for init time usage 114 115#pragma pack(1) 116struct cciss_scsi_cmd_stack_t { 117 struct cciss_scsi_cmd_stack_elem_t *pool; 118 struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE]; 119 dma_addr_t cmd_pool_handle; 120 int top; 121}; 122#pragma pack() 123 124struct cciss_scsi_adapter_data_t { 125 struct Scsi_Host *scsi_host; 126 struct cciss_scsi_cmd_stack_t cmd_stack; 127 SGDescriptor_struct **cmd_sg_list; 128 int registered; 129 spinlock_t lock; // to protect ccissscsi[ctlr]; 130}; 131 132#define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \ 133 &h->scsi_ctlr->lock, flags); 134#define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \ 135 &h->scsi_ctlr->lock, flags); 136 137static CommandList_struct * 138scsi_cmd_alloc(ctlr_info_t *h) 139{ 140 /* assume only one process in here at a time, locking done by caller. */ 141 /* use h->lock */ 142 /* might be better to rewrite how we allocate scsi commands in a way that */ 143 /* needs no locking at all. */ 144 145 /* take the top memory chunk off the stack and return it, if any. */ 146 struct cciss_scsi_cmd_stack_elem_t *c; 147 struct cciss_scsi_adapter_data_t *sa; 148 struct cciss_scsi_cmd_stack_t *stk; 149 u64bit temp64; 150 151 sa = h->scsi_ctlr; 152 stk = &sa->cmd_stack; 153 154 if (stk->top < 0) 155 return NULL; 156 c = stk->elem[stk->top]; 157 /* memset(c, 0, sizeof(*c)); */ 158 memset(&c->cmd, 0, sizeof(c->cmd)); 159 memset(&c->Err, 0, sizeof(c->Err)); 160 /* set physical addr of cmd and addr of scsi parameters */ 161 c->cmd.busaddr = c->busaddr; 162 c->cmd.cmdindex = c->cmdindex; 163 /* (__u32) (stk->cmd_pool_handle + 164 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ 165 166 temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); 167 /* (__u64) (stk->cmd_pool_handle + 168 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + 169 sizeof(CommandList_struct)); */ 170 stk->top--; 171 c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; 172 c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; 173 c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); 174 175 c->cmd.ctlr = h->ctlr; 176 c->cmd.err_info = &c->Err; 177 178 return (CommandList_struct *) c; 179} 180 181static void 182scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c) 183{ 184 /* assume only one process in here at a time, locking done by caller. */ 185 /* use h->lock */ 186 /* drop the free memory chunk on top of the stack. */ 187 188 struct cciss_scsi_adapter_data_t *sa; 189 struct cciss_scsi_cmd_stack_t *stk; 190 191 sa = h->scsi_ctlr; 192 stk = &sa->cmd_stack; 193 stk->top++; 194 if (stk->top >= CMD_STACK_SIZE) { 195 printk("cciss: scsi_cmd_free called too many times.\n"); 196 BUG(); 197 } 198 stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c; 199} 200 201static int 202scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa) 203{ 204 int i; 205 struct cciss_scsi_cmd_stack_t *stk; 206 size_t size; 207 208 sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h, 209 h->chainsize, CMD_STACK_SIZE); 210 if (!sa->cmd_sg_list && h->chainsize > 0) 211 return -ENOMEM; 212 213 stk = &sa->cmd_stack; 214 size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; 215 216 /* Check alignment, see cciss_cmd.h near CommandList_struct def. */ 217 BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0); 218 /* pci_alloc_consistent guarantees 32-bit DMA address will be used */ 219 stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) 220 pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle); 221 222 if (stk->pool == NULL) { 223 cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE); 224 sa->cmd_sg_list = NULL; 225 return -ENOMEM; 226 } 227 228 for (i=0; i<CMD_STACK_SIZE; i++) { 229 stk->elem[i] = &stk->pool[i]; 230 stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + 231 (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); 232 stk->elem[i]->cmdindex = i; 233 } 234 stk->top = CMD_STACK_SIZE-1; 235 return 0; 236} 237 238static void 239scsi_cmd_stack_free(ctlr_info_t *h) 240{ 241 struct cciss_scsi_adapter_data_t *sa; 242 struct cciss_scsi_cmd_stack_t *stk; 243 size_t size; 244 245 sa = h->scsi_ctlr; 246 stk = &sa->cmd_stack; 247 if (stk->top != CMD_STACK_SIZE-1) { 248 printk( "cciss: %d scsi commands are still outstanding.\n", 249 CMD_STACK_SIZE - stk->top); 250 // BUG(); 251 printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk); 252 } 253 size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE; 254 255 pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle); 256 stk->pool = NULL; 257 cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE); 258} 259 260#if 0 261static int xmargin=8; 262static int amargin=60; 263 264static void 265print_bytes (unsigned char *c, int len, int hex, int ascii) 266{ 267 268 int i; 269 unsigned char *x; 270 271 if (hex) 272 { 273 x = c; 274 for (i=0;i<len;i++) 275 { 276 if ((i % xmargin) == 0 && i>0) printk("\n"); 277 if ((i % xmargin) == 0) printk("0x%04x:", i); 278 printk(" %02x", *x); 279 x++; 280 } 281 printk("\n"); 282 } 283 if (ascii) 284 { 285 x = c; 286 for (i=0;i<len;i++) 287 { 288 if ((i % amargin) == 0 && i>0) printk("\n"); 289 if ((i % amargin) == 0) printk("0x%04x:", i); 290 if (*x > 26 && *x < 128) printk("%c", *x); 291 else printk("."); 292 x++; 293 } 294 printk("\n"); 295 } 296} 297 298static void 299print_cmd(CommandList_struct *cp) 300{ 301 printk("queue:%d\n", cp->Header.ReplyQueue); 302 printk("sglist:%d\n", cp->Header.SGList); 303 printk("sgtot:%d\n", cp->Header.SGTotal); 304 printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, 305 cp->Header.Tag.lower); 306 printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 307 cp->Header.LUN.LunAddrBytes[0], 308 cp->Header.LUN.LunAddrBytes[1], 309 cp->Header.LUN.LunAddrBytes[2], 310 cp->Header.LUN.LunAddrBytes[3], 311 cp->Header.LUN.LunAddrBytes[4], 312 cp->Header.LUN.LunAddrBytes[5], 313 cp->Header.LUN.LunAddrBytes[6], 314 cp->Header.LUN.LunAddrBytes[7]); 315 printk("CDBLen:%d\n", cp->Request.CDBLen); 316 printk("Type:%d\n",cp->Request.Type.Type); 317 printk("Attr:%d\n",cp->Request.Type.Attribute); 318 printk(" Dir:%d\n",cp->Request.Type.Direction); 319 printk("Timeout:%d\n",cp->Request.Timeout); 320 printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x" 321 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 322 cp->Request.CDB[0], cp->Request.CDB[1], 323 cp->Request.CDB[2], cp->Request.CDB[3], 324 cp->Request.CDB[4], cp->Request.CDB[5], 325 cp->Request.CDB[6], cp->Request.CDB[7], 326 cp->Request.CDB[8], cp->Request.CDB[9], 327 cp->Request.CDB[10], cp->Request.CDB[11], 328 cp->Request.CDB[12], cp->Request.CDB[13], 329 cp->Request.CDB[14], cp->Request.CDB[15]), 330 printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", 331 cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, 332 cp->ErrDesc.Len); 333 printk("sgs..........Errorinfo:\n"); 334 printk("scsistatus:%d\n", cp->err_info->ScsiStatus); 335 printk("senselen:%d\n", cp->err_info->SenseLen); 336 printk("cmd status:%d\n", cp->err_info->CommandStatus); 337 printk("resid cnt:%d\n", cp->err_info->ResidualCnt); 338 printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); 339 printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); 340 printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); 341 342} 343 344#endif 345 346static int 347find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun) 348{ 349 /* finds an unused bus, target, lun for a new device */ 350 /* assumes h->scsi_ctlr->lock is held */ 351 int i, found=0; 352 unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; 353 354 memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); 355 356 target_taken[SELF_SCSI_ID] = 1; 357 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) 358 target_taken[ccissscsi[h->ctlr].dev[i].target] = 1; 359 360 for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) { 361 if (!target_taken[i]) { 362 *bus = 0; *target=i; *lun = 0; found=1; 363 break; 364 } 365 } 366 return (!found); 367} 368struct scsi2map { 369 char scsi3addr[8]; 370 int bus, target, lun; 371}; 372 373static int 374cciss_scsi_add_entry(ctlr_info_t *h, int hostno, 375 struct cciss_scsi_dev_t *device, 376 struct scsi2map *added, int *nadded) 377{ 378 /* assumes h->scsi_ctlr->lock is held */ 379 int n = ccissscsi[h->ctlr].ndevices; 380 struct cciss_scsi_dev_t *sd; 381 int i, bus, target, lun; 382 unsigned char addr1[8], addr2[8]; 383 384 if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { 385 printk("cciss%d: Too many devices, " 386 "some will be inaccessible.\n", h->ctlr); 387 return -1; 388 } 389 390 bus = target = -1; 391 lun = 0; 392 /* Is this device a non-zero lun of a multi-lun device */ 393 /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ 394 if (device->scsi3addr[4] != 0) { 395 /* Search through our list and find the device which */ 396 /* has the same 8 byte LUN address, excepting byte 4. */ 397 /* Assign the same bus and target for this new LUN. */ 398 /* Use the logical unit number from the firmware. */ 399 memcpy(addr1, device->scsi3addr, 8); 400 addr1[4] = 0; 401 for (i = 0; i < n; i++) { 402 sd = &ccissscsi[h->ctlr].dev[i]; 403 memcpy(addr2, sd->scsi3addr, 8); 404 addr2[4] = 0; 405 /* differ only in byte 4? */ 406 if (memcmp(addr1, addr2, 8) == 0) { 407 bus = sd->bus; 408 target = sd->target; 409 lun = device->scsi3addr[4]; 410 break; 411 } 412 } 413 } 414 415 sd = &ccissscsi[h->ctlr].dev[n]; 416 if (lun == 0) { 417 if (find_bus_target_lun(h, 418 &sd->bus, &sd->target, &sd->lun) != 0) 419 return -1; 420 } else { 421 sd->bus = bus; 422 sd->target = target; 423 sd->lun = lun; 424 } 425 added[*nadded].bus = sd->bus; 426 added[*nadded].target = sd->target; 427 added[*nadded].lun = sd->lun; 428 (*nadded)++; 429 430 memcpy(sd->scsi3addr, device->scsi3addr, 8); 431 memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); 432 memcpy(sd->revision, device->revision, sizeof(sd->revision)); 433 memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); 434 sd->devtype = device->devtype; 435 436 ccissscsi[h->ctlr].ndevices++; 437 438 /* initially, (before registering with scsi layer) we don't 439 know our hostno and we don't want to print anything first 440 time anyway (the scsi layer's inquiries will show that info) */ 441 if (hostno != -1) 442 printk("cciss%d: %s device c%db%dt%dl%d added.\n", 443 h->ctlr, scsi_device_type(sd->devtype), hostno, 444 sd->bus, sd->target, sd->lun); 445 return 0; 446} 447 448static void 449cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry, 450 struct scsi2map *removed, int *nremoved) 451{ 452 /* assumes h->ctlr]->scsi_ctlr->lock is held */ 453 int i; 454 struct cciss_scsi_dev_t sd; 455 456 if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; 457 sd = ccissscsi[h->ctlr].dev[entry]; 458 removed[*nremoved].bus = sd.bus; 459 removed[*nremoved].target = sd.target; 460 removed[*nremoved].lun = sd.lun; 461 (*nremoved)++; 462 for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++) 463 ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1]; 464 ccissscsi[h->ctlr].ndevices--; 465 printk("cciss%d: %s device c%db%dt%dl%d removed.\n", 466 h->ctlr, scsi_device_type(sd.devtype), hostno, 467 sd.bus, sd.target, sd.lun); 468} 469 470 471#define SCSI3ADDR_EQ(a,b) ( \ 472 (a)[7] == (b)[7] && \ 473 (a)[6] == (b)[6] && \ 474 (a)[5] == (b)[5] && \ 475 (a)[4] == (b)[4] && \ 476 (a)[3] == (b)[3] && \ 477 (a)[2] == (b)[2] && \ 478 (a)[1] == (b)[1] && \ 479 (a)[0] == (b)[0]) 480 481static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr) 482{ 483 /* called when scsi_add_device fails in order to re-adjust */ 484 /* ccissscsi[] to match the mid layer's view. */ 485 unsigned long flags; 486 int i, j; 487 CPQ_TAPE_LOCK(h, flags); 488 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { 489 if (memcmp(scsi3addr, 490 ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) { 491 for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++) 492 ccissscsi[h->ctlr].dev[j] = 493 ccissscsi[h->ctlr].dev[j+1]; 494 ccissscsi[h->ctlr].ndevices--; 495 break; 496 } 497 } 498 CPQ_TAPE_UNLOCK(h, flags); 499} 500 501static int device_is_the_same(struct cciss_scsi_dev_t *dev1, 502 struct cciss_scsi_dev_t *dev2) 503{ 504 return dev1->devtype == dev2->devtype && 505 memcmp(dev1->scsi3addr, dev2->scsi3addr, 506 sizeof(dev1->scsi3addr)) == 0 && 507 memcmp(dev1->device_id, dev2->device_id, 508 sizeof(dev1->device_id)) == 0 && 509 memcmp(dev1->vendor, dev2->vendor, 510 sizeof(dev1->vendor)) == 0 && 511 memcmp(dev1->model, dev2->model, 512 sizeof(dev1->model)) == 0 && 513 memcmp(dev1->revision, dev2->revision, 514 sizeof(dev1->revision)) == 0; 515} 516 517static int 518adjust_cciss_scsi_table(ctlr_info_t *h, int hostno, 519 struct cciss_scsi_dev_t sd[], int nsds) 520{ 521 /* sd contains scsi3 addresses and devtypes, but 522 bus target and lun are not filled in. This funciton 523 takes what's in sd to be the current and adjusts 524 ccissscsi[] to be in line with what's in sd. */ 525 526 int i,j, found, changes=0; 527 struct cciss_scsi_dev_t *csd; 528 unsigned long flags; 529 struct scsi2map *added, *removed; 530 int nadded, nremoved; 531 struct Scsi_Host *sh = NULL; 532 533 added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, 534 GFP_KERNEL); 535 removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, 536 GFP_KERNEL); 537 538 if (!added || !removed) { 539 printk(KERN_WARNING "cciss%d: Out of memory in " 540 "adjust_cciss_scsi_table\n", h->ctlr); 541 goto free_and_out; 542 } 543 544 CPQ_TAPE_LOCK(h, flags); 545 546 if (hostno != -1) /* if it's not the first time... */ 547 sh = h->scsi_ctlr->scsi_host; 548 549 /* find any devices in ccissscsi[] that are not in 550 sd[] and remove them from ccissscsi[] */ 551 552 i = 0; 553 nremoved = 0; 554 nadded = 0; 555 while (i < ccissscsi[h->ctlr].ndevices) { 556 csd = &ccissscsi[h->ctlr].dev[i]; 557 found=0; 558 for (j=0;j<nsds;j++) { 559 if (SCSI3ADDR_EQ(sd[j].scsi3addr, 560 csd->scsi3addr)) { 561 if (device_is_the_same(&sd[j], csd)) 562 found=2; 563 else 564 found=1; 565 break; 566 } 567 } 568 569 if (found == 0) { /* device no longer present. */ 570 changes++; 571 /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n", 572 h->ctlr, scsi_device_type(csd->devtype), hostno, 573 csd->bus, csd->target, csd->lun); */ 574 cciss_scsi_remove_entry(h, hostno, i, 575 removed, &nremoved); 576 /* remove ^^^, hence i not incremented */ 577 } else if (found == 1) { /* device is different in some way */ 578 changes++; 579 printk("cciss%d: device c%db%dt%dl%d has changed.\n", 580 h->ctlr, hostno, 581 csd->bus, csd->target, csd->lun); 582 cciss_scsi_remove_entry(h, hostno, i, 583 removed, &nremoved); 584 /* remove ^^^, hence i not incremented */ 585 if (cciss_scsi_add_entry(h, hostno, &sd[j], 586 added, &nadded) != 0) 587 /* we just removed one, so add can't fail. */ 588 BUG(); 589 csd->devtype = sd[j].devtype; 590 memcpy(csd->device_id, sd[j].device_id, 591 sizeof(csd->device_id)); 592 memcpy(csd->vendor, sd[j].vendor, 593 sizeof(csd->vendor)); 594 memcpy(csd->model, sd[j].model, 595 sizeof(csd->model)); 596 memcpy(csd->revision, sd[j].revision, 597 sizeof(csd->revision)); 598 } else /* device is same as it ever was, */ 599 i++; /* so just move along. */ 600 } 601 602 /* Now, make sure every device listed in sd[] is also 603 listed in ccissscsi[], adding them if they aren't found */ 604 605 for (i=0;i<nsds;i++) { 606 found=0; 607 for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) { 608 csd = &ccissscsi[h->ctlr].dev[j]; 609 if (SCSI3ADDR_EQ(sd[i].scsi3addr, 610 csd->scsi3addr)) { 611 if (device_is_the_same(&sd[i], csd)) 612 found=2; /* found device */ 613 else 614 found=1; /* found a bug. */ 615 break; 616 } 617 } 618 if (!found) { 619 changes++; 620 if (cciss_scsi_add_entry(h, hostno, &sd[i], 621 added, &nadded) != 0) 622 break; 623 } else if (found == 1) { 624 /* should never happen... */ 625 changes++; 626 printk(KERN_WARNING "cciss%d: device " 627 "unexpectedly changed\n", h->ctlr); 628 /* but if it does happen, we just ignore that device */ 629 } 630 } 631 CPQ_TAPE_UNLOCK(h, flags); 632 633 /* Don't notify scsi mid layer of any changes the first time through */ 634 /* (or if there are no changes) scsi_scan_host will do it later the */ 635 /* first time through. */ 636 if (hostno == -1 || !changes) 637 goto free_and_out; 638 639 /* Notify scsi mid layer of any removed devices */ 640 for (i = 0; i < nremoved; i++) { 641 struct scsi_device *sdev = 642 scsi_device_lookup(sh, removed[i].bus, 643 removed[i].target, removed[i].lun); 644 if (sdev != NULL) { 645 scsi_remove_device(sdev); 646 scsi_device_put(sdev); 647 } else { 648 /* We don't expect to get here. */ 649 /* future cmds to this device will get selection */ 650 /* timeout as if the device was gone. */ 651 printk(KERN_WARNING "cciss%d: didn't find " 652 "c%db%dt%dl%d\n for removal.", 653 h->ctlr, hostno, removed[i].bus, 654 removed[i].target, removed[i].lun); 655 } 656 } 657 658 /* Notify scsi mid layer of any added devices */ 659 for (i = 0; i < nadded; i++) { 660 int rc; 661 rc = scsi_add_device(sh, added[i].bus, 662 added[i].target, added[i].lun); 663 if (rc == 0) 664 continue; 665 printk(KERN_WARNING "cciss%d: scsi_add_device " 666 "c%db%dt%dl%d failed, device not added.\n", 667 h->ctlr, hostno, 668 added[i].bus, added[i].target, added[i].lun); 669 /* now we have to remove it from ccissscsi, */ 670 /* since it didn't get added to scsi mid layer */ 671 fixup_botched_add(h, added[i].scsi3addr); 672 } 673 674free_and_out: 675 kfree(added); 676 kfree(removed); 677 return 0; 678} 679 680static int 681lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr) 682{ 683 int i; 684 struct cciss_scsi_dev_t *sd; 685 unsigned long flags; 686 687 CPQ_TAPE_LOCK(h, flags); 688 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { 689 sd = &ccissscsi[h->ctlr].dev[i]; 690 if (sd->bus == bus && 691 sd->target == target && 692 sd->lun == lun) { 693 memcpy(scsi3addr, &sd->scsi3addr[0], 8); 694 CPQ_TAPE_UNLOCK(h, flags); 695 return 0; 696 } 697 } 698 CPQ_TAPE_UNLOCK(h, flags); 699 return -1; 700} 701 702static void 703cciss_scsi_setup(ctlr_info_t *h) 704{ 705 struct cciss_scsi_adapter_data_t * shba; 706 707 ccissscsi[h->ctlr].ndevices = 0; 708 shba = (struct cciss_scsi_adapter_data_t *) 709 kmalloc(sizeof(*shba), GFP_KERNEL); 710 if (shba == NULL) 711 return; 712 shba->scsi_host = NULL; 713 spin_lock_init(&shba->lock); 714 shba->registered = 0; 715 if (scsi_cmd_stack_setup(h, shba) != 0) { 716 kfree(shba); 717 shba = NULL; 718 } 719 h->scsi_ctlr = shba; 720 return; 721} 722 723static void complete_scsi_command(CommandList_struct *c, int timeout, 724 __u32 tag) 725{ 726 struct scsi_cmnd *cmd; 727 ctlr_info_t *h; 728 ErrorInfo_struct *ei; 729 730 ei = c->err_info; 731 732 /* First, see if it was a message rather than a command */ 733 if (c->Request.Type.Type == TYPE_MSG) { 734 c->cmd_type = CMD_MSG_DONE; 735 return; 736 } 737 738 cmd = (struct scsi_cmnd *) c->scsi_cmd; 739 h = hba[c->ctlr]; 740 741 scsi_dma_unmap(cmd); 742 if (c->Header.SGTotal > h->max_cmd_sgentries) 743 cciss_unmap_sg_chain_block(h, c); 744 745 cmd->result = (DID_OK << 16); /* host byte */ 746 cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ 747 /* cmd->result |= (GOOD < 1); */ /* status byte */ 748 749 cmd->result |= (ei->ScsiStatus); 750 /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ 751 752 /* copy the sense data whether we need to or not. */ 753 754 memcpy(cmd->sense_buffer, ei->SenseInfo, 755 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? 756 SCSI_SENSE_BUFFERSIZE : 757 ei->SenseLen); 758 scsi_set_resid(cmd, ei->ResidualCnt); 759 760 if(ei->CommandStatus != 0) 761 { /* an error has occurred */ 762 switch(ei->CommandStatus) 763 { 764 case CMD_TARGET_STATUS: 765 /* Pass it up to the upper layers... */ 766 if( ei->ScsiStatus) 767 { 768#if 0 769 printk(KERN_WARNING "cciss: cmd %p " 770 "has SCSI Status = %x\n", 771 c, ei->ScsiStatus); 772#endif 773 cmd->result |= (ei->ScsiStatus << 1); 774 } 775 else { /* scsi status is zero??? How??? */ 776 777 /* Ordinarily, this case should never happen, but there is a bug 778 in some released firmware revisions that allows it to happen 779 if, for example, a 4100 backplane loses power and the tape 780 drive is in it. We assume that it's a fatal error of some 781 kind because we can't show that it wasn't. We will make it 782 look like selection timeout since that is the most common 783 reason for this to occur, and it's severe enough. */ 784 785 cmd->result = DID_NO_CONNECT << 16; 786 } 787 break; 788 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ 789 break; 790 case CMD_DATA_OVERRUN: 791 printk(KERN_WARNING "cciss: %p has" 792 " completed with data overrun " 793 "reported\n", c); 794 break; 795 case CMD_INVALID: { 796 /* print_bytes(c, sizeof(*c), 1, 0); 797 print_cmd(c); */ 798 /* We get CMD_INVALID if you address a non-existent tape drive instead 799 of a selection timeout (no response). You will see this if you yank 800 out a tape drive, then try to access it. This is kind of a shame 801 because it means that any other CMD_INVALID (e.g. driver bug) will 802 get interpreted as a missing target. */ 803 cmd->result = DID_NO_CONNECT << 16; 804 } 805 break; 806 case CMD_PROTOCOL_ERR: 807 printk(KERN_WARNING "cciss: %p has " 808 "protocol error\n", c); 809 break; 810 case CMD_HARDWARE_ERR: 811 cmd->result = DID_ERROR << 16; 812 printk(KERN_WARNING "cciss: %p had " 813 " hardware error\n", c); 814 break; 815 case CMD_CONNECTION_LOST: 816 cmd->result = DID_ERROR << 16; 817 printk(KERN_WARNING "cciss: %p had " 818 "connection lost\n", c); 819 break; 820 case CMD_ABORTED: 821 cmd->result = DID_ABORT << 16; 822 printk(KERN_WARNING "cciss: %p was " 823 "aborted\n", c); 824 break; 825 case CMD_ABORT_FAILED: 826 cmd->result = DID_ERROR << 16; 827 printk(KERN_WARNING "cciss: %p reports " 828 "abort failed\n", c); 829 break; 830 case CMD_UNSOLICITED_ABORT: 831 cmd->result = DID_ABORT << 16; 832 printk(KERN_WARNING "cciss: %p aborted " 833 "do to an unsolicited abort\n", c); 834 break; 835 case CMD_TIMEOUT: 836 cmd->result = DID_TIME_OUT << 16; 837 printk(KERN_WARNING "cciss: %p timedout\n", 838 c); 839 break; 840 default: 841 cmd->result = DID_ERROR << 16; 842 printk(KERN_WARNING "cciss: %p returned " 843 "unknown status %x\n", c, 844 ei->CommandStatus); 845 } 846 } 847 cmd->scsi_done(cmd); 848 scsi_cmd_free(h, c); 849} 850 851static int 852cciss_scsi_detect(ctlr_info_t *h) 853{ 854 struct Scsi_Host *sh; 855 int error; 856 857 sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); 858 if (sh == NULL) 859 goto fail; 860 sh->io_port = 0; // good enough? FIXME, 861 sh->n_io_port = 0; // I don't think we use these two... 862 sh->this_id = SELF_SCSI_ID; 863 sh->sg_tablesize = h->maxsgentries; 864 sh->max_cmd_len = MAX_COMMAND_SIZE; 865 866 ((struct cciss_scsi_adapter_data_t *) 867 h->scsi_ctlr)->scsi_host = sh; 868 sh->hostdata[0] = (unsigned long) h; 869 sh->irq = h->intr[SIMPLE_MODE_INT]; 870 sh->unique_id = sh->irq; 871 error = scsi_add_host(sh, &h->pdev->dev); 872 if (error) 873 goto fail_host_put; 874 scsi_scan_host(sh); 875 return 1; 876 877 fail_host_put: 878 scsi_host_put(sh); 879 fail: 880 return 0; 881} 882 883static void 884cciss_unmap_one(struct pci_dev *pdev, 885 CommandList_struct *c, 886 size_t buflen, 887 int data_direction) 888{ 889 u64bit addr64; 890 891 addr64.val32.lower = c->SG[0].Addr.lower; 892 addr64.val32.upper = c->SG[0].Addr.upper; 893 pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); 894} 895 896static void 897cciss_map_one(struct pci_dev *pdev, 898 CommandList_struct *c, 899 unsigned char *buf, 900 size_t buflen, 901 int data_direction) 902{ 903 __u64 addr64; 904 905 addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); 906 c->SG[0].Addr.lower = 907 (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); 908 c->SG[0].Addr.upper = 909 (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); 910 c->SG[0].Len = buflen; 911 c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ 912 c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ 913} 914 915static int 916cciss_scsi_do_simple_cmd(ctlr_info_t *h, 917 CommandList_struct *c, 918 unsigned char *scsi3addr, 919 unsigned char *cdb, 920 unsigned char cdblen, 921 unsigned char *buf, int bufsize, 922 int direction) 923{ 924 DECLARE_COMPLETION_ONSTACK(wait); 925 926 c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */ 927 c->scsi_cmd = NULL; 928 c->Header.ReplyQueue = 0; /* unused in simple mode */ 929 memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN)); 930 c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ 931 // Fill in the request block... 932 933 /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", 934 scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], 935 scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ 936 937 memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); 938 memcpy(c->Request.CDB, cdb, cdblen); 939 c->Request.Timeout = 0; 940 c->Request.CDBLen = cdblen; 941 c->Request.Type.Type = TYPE_CMD; 942 c->Request.Type.Attribute = ATTR_SIMPLE; 943 c->Request.Type.Direction = direction; 944 945 /* Fill in the SG list and do dma mapping */ 946 cciss_map_one(h->pdev, c, (unsigned char *) buf, 947 bufsize, DMA_FROM_DEVICE); 948 949 c->waiting = &wait; 950 enqueue_cmd_and_start_io(h, c); 951 wait_for_completion(&wait); 952 953 /* undo the dma mapping */ 954 cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE); 955 return(0); 956} 957 958static void 959cciss_scsi_interpret_error(CommandList_struct *c) 960{ 961 ErrorInfo_struct *ei; 962 963 ei = c->err_info; 964 switch(ei->CommandStatus) 965 { 966 case CMD_TARGET_STATUS: 967 printk(KERN_WARNING "cciss: cmd %p has " 968 "completed with errors\n", c); 969 printk(KERN_WARNING "cciss: cmd %p " 970 "has SCSI Status = %x\n", 971 c, ei->ScsiStatus); 972 if (ei->ScsiStatus == 0) 973 printk(KERN_WARNING 974 "cciss:SCSI status is abnormally zero. " 975 "(probably indicates selection timeout " 976 "reported incorrectly due to a known " 977 "firmware bug, circa July, 2001.)\n"); 978 break; 979 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ 980 printk("UNDERRUN\n"); 981 break; 982 case CMD_DATA_OVERRUN: 983 printk(KERN_WARNING "cciss: %p has" 984 " completed with data overrun " 985 "reported\n", c); 986 break; 987 case CMD_INVALID: { 988 /* controller unfortunately reports SCSI passthru's */ 989 /* to non-existent targets as invalid commands. */ 990 printk(KERN_WARNING "cciss: %p is " 991 "reported invalid (probably means " 992 "target device no longer present)\n", c); 993 /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0); 994 print_cmd(c); */ 995 } 996 break; 997 case CMD_PROTOCOL_ERR: 998 printk(KERN_WARNING "cciss: %p has " 999 "protocol error\n", c); 1000 break; 1001 case CMD_HARDWARE_ERR: 1002 /* cmd->result = DID_ERROR << 16; */ 1003 printk(KERN_WARNING "cciss: %p had " 1004 " hardware error\n", c); 1005 break; 1006 case CMD_CONNECTION_LOST: 1007 printk(KERN_WARNING "cciss: %p had " 1008 "connection lost\n", c); 1009 break; 1010 case CMD_ABORTED: 1011 printk(KERN_WARNING "cciss: %p was " 1012 "aborted\n", c); 1013 break; 1014 case CMD_ABORT_FAILED: 1015 printk(KERN_WARNING "cciss: %p reports " 1016 "abort failed\n", c); 1017 break; 1018 case CMD_UNSOLICITED_ABORT: 1019 printk(KERN_WARNING "cciss: %p aborted " 1020 "do to an unsolicited abort\n", c); 1021 break; 1022 case CMD_TIMEOUT: 1023 printk(KERN_WARNING "cciss: %p timedout\n", c); 1024 break; 1025 default: 1026 printk(KERN_WARNING "cciss: %p returned " 1027 "unknown status %x\n", c, ei->CommandStatus); 1028 } 1029} 1030 1031static int 1032cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr, 1033 unsigned char page, unsigned char *buf, 1034 unsigned char bufsize) 1035{ 1036 int rc; 1037 CommandList_struct *c; 1038 char cdb[6]; 1039 ErrorInfo_struct *ei; 1040 unsigned long flags; 1041 1042 spin_lock_irqsave(&h->lock, flags); 1043 c = scsi_cmd_alloc(h); 1044 spin_unlock_irqrestore(&h->lock, flags); 1045 1046 if (c == NULL) { /* trouble... */ 1047 printk("cmd_alloc returned NULL!\n"); 1048 return -1; 1049 } 1050 1051 ei = c->err_info; 1052 1053 cdb[0] = CISS_INQUIRY; 1054 cdb[1] = (page != 0); 1055 cdb[2] = page; 1056 cdb[3] = 0; 1057 cdb[4] = bufsize; 1058 cdb[5] = 0; 1059 rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb, 1060 6, buf, bufsize, XFER_READ); 1061 1062 if (rc != 0) return rc; /* something went wrong */ 1063 1064 if (ei->CommandStatus != 0 && 1065 ei->CommandStatus != CMD_DATA_UNDERRUN) { 1066 cciss_scsi_interpret_error(c); 1067 rc = -1; 1068 } 1069 spin_lock_irqsave(&h->lock, flags); 1070 scsi_cmd_free(h, c); 1071 spin_unlock_irqrestore(&h->lock, flags); 1072 return rc; 1073} 1074 1075/* Get the device id from inquiry page 0x83 */ 1076static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr, 1077 unsigned char *device_id, int buflen) 1078{ 1079 int rc; 1080 unsigned char *buf; 1081 1082 if (buflen > 16) 1083 buflen = 16; 1084 buf = kzalloc(64, GFP_KERNEL); 1085 if (!buf) 1086 return -1; 1087 rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64); 1088 if (rc == 0) 1089 memcpy(device_id, &buf[8], buflen); 1090 kfree(buf); 1091 return rc != 0; 1092} 1093 1094static int 1095cciss_scsi_do_report_phys_luns(ctlr_info_t *h, 1096 ReportLunData_struct *buf, int bufsize) 1097{ 1098 int rc; 1099 CommandList_struct *c; 1100 unsigned char cdb[12]; 1101 unsigned char scsi3addr[8]; 1102 ErrorInfo_struct *ei; 1103 unsigned long flags; 1104 1105 spin_lock_irqsave(&h->lock, flags); 1106 c = scsi_cmd_alloc(h); 1107 spin_unlock_irqrestore(&h->lock, flags); 1108 if (c == NULL) { /* trouble... */ 1109 printk("cmd_alloc returned NULL!\n"); 1110 return -1; 1111 } 1112 1113 memset(&scsi3addr[0], 0, 8); /* address the controller */ 1114 cdb[0] = CISS_REPORT_PHYS; 1115 cdb[1] = 0; 1116 cdb[2] = 0; 1117 cdb[3] = 0; 1118 cdb[4] = 0; 1119 cdb[5] = 0; 1120 cdb[6] = (bufsize >> 24) & 0xFF; //MSB 1121 cdb[7] = (bufsize >> 16) & 0xFF; 1122 cdb[8] = (bufsize >> 8) & 0xFF; 1123 cdb[9] = bufsize & 0xFF; 1124 cdb[10] = 0; 1125 cdb[11] = 0; 1126 1127 rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, 1128 cdb, 12, 1129 (unsigned char *) buf, 1130 bufsize, XFER_READ); 1131 1132 if (rc != 0) return rc; /* something went wrong */ 1133 1134 ei = c->err_info; 1135 if (ei->CommandStatus != 0 && 1136 ei->CommandStatus != CMD_DATA_UNDERRUN) { 1137 cciss_scsi_interpret_error(c); 1138 rc = -1; 1139 } 1140 spin_lock_irqsave(&h->lock, flags); 1141 scsi_cmd_free(h, c); 1142 spin_unlock_irqrestore(&h->lock, flags); 1143 return rc; 1144} 1145 1146static void 1147cciss_update_non_disk_devices(ctlr_info_t *h, int hostno) 1148{ 1149 /* the idea here is we could get notified from /proc 1150 that some devices have changed, so we do a report 1151 physical luns cmd, and adjust our list of devices 1152 accordingly. (We can't rely on the scsi-mid layer just 1153 doing inquiries, because the "busses" that the scsi 1154 mid-layer probes are totally fabricated by this driver, 1155 so new devices wouldn't show up. 1156 1157 the scsi3addr's of devices won't change so long as the 1158 adapter is not reset. That means we can rescan and 1159 tell which devices we already know about, vs. new 1160 devices, vs. disappearing devices. 1161 1162 Also, if you yank out a tape drive, then put in a disk 1163 in it's place, (say, a configured volume from another 1164 array controller for instance) _don't_ poke this driver 1165 (so it thinks it's still a tape, but _do_ poke the scsi 1166 mid layer, so it does an inquiry... the scsi mid layer 1167 will see the physical disk. This would be bad. Need to 1168 think about how to prevent that. One idea would be to 1169 snoop all scsi responses and if an inquiry repsonse comes 1170 back that reports a disk, chuck it an return selection 1171 timeout instead and adjust our table... Not sure i like 1172 that though. 1173 1174 */ 1175#define OBDR_TAPE_INQ_SIZE 49 1176#define OBDR_TAPE_SIG "$DR-10" 1177 ReportLunData_struct *ld_buff; 1178 unsigned char *inq_buff; 1179 unsigned char scsi3addr[8]; 1180 __u32 num_luns=0; 1181 unsigned char *ch; 1182 struct cciss_scsi_dev_t *currentsd, *this_device; 1183 int ncurrent=0; 1184 int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; 1185 int i; 1186 1187 ld_buff = kzalloc(reportlunsize, GFP_KERNEL); 1188 inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); 1189 currentsd = kzalloc(sizeof(*currentsd) * 1190 (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); 1191 if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { 1192 printk(KERN_ERR "cciss: out of memory\n"); 1193 goto out; 1194 } 1195 this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; 1196 if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) { 1197 ch = &ld_buff->LUNListLength[0]; 1198 num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; 1199 if (num_luns > CISS_MAX_PHYS_LUN) { 1200 printk(KERN_WARNING 1201 "cciss: Maximum physical LUNs (%d) exceeded. " 1202 "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, 1203 num_luns - CISS_MAX_PHYS_LUN); 1204 num_luns = CISS_MAX_PHYS_LUN; 1205 } 1206 } 1207 else { 1208 printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); 1209 goto out; 1210 } 1211 1212 1213 /* adjust our table of devices */ 1214 for (i = 0; i < num_luns; i++) { 1215 /* for each physical lun, do an inquiry */ 1216 if (ld_buff->LUN[i][3] & 0xC0) continue; 1217 memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); 1218 memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); 1219 1220 if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, 1221 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) 1222 /* Inquiry failed (msg printed already) */ 1223 continue; /* so we will skip this device. */ 1224 1225 this_device->devtype = (inq_buff[0] & 0x1f); 1226 this_device->bus = -1; 1227 this_device->target = -1; 1228 this_device->lun = -1; 1229 memcpy(this_device->scsi3addr, scsi3addr, 8); 1230 memcpy(this_device->vendor, &inq_buff[8], 1231 sizeof(this_device->vendor)); 1232 memcpy(this_device->model, &inq_buff[16], 1233 sizeof(this_device->model)); 1234 memcpy(this_device->revision, &inq_buff[32], 1235 sizeof(this_device->revision)); 1236 memset(this_device->device_id, 0, 1237 sizeof(this_device->device_id)); 1238 cciss_scsi_get_device_id(h, scsi3addr, 1239 this_device->device_id, sizeof(this_device->device_id)); 1240 1241 switch (this_device->devtype) 1242 { 1243 case 0x05: /* CD-ROM */ { 1244 1245 /* We don't *really* support actual CD-ROM devices, 1246 * just this "One Button Disaster Recovery" tape drive 1247 * which temporarily pretends to be a CD-ROM drive. 1248 * So we check that the device is really an OBDR tape 1249 * device by checking for "$DR-10" in bytes 43-48 of 1250 * the inquiry data. 1251 */ 1252 char obdr_sig[7]; 1253 1254 strncpy(obdr_sig, &inq_buff[43], 6); 1255 obdr_sig[6] = '\0'; 1256 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) 1257 /* Not OBDR device, ignore it. */ 1258 break; 1259 } 1260 /* fall through . . . */ 1261 case 0x01: /* sequential access, (tape) */ 1262 case 0x08: /* medium changer */ 1263 if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { 1264 printk(KERN_INFO "cciss%d: %s ignored, " 1265 "too many devices.\n", h->ctlr, 1266 scsi_device_type(this_device->devtype)); 1267 break; 1268 } 1269 currentsd[ncurrent] = *this_device; 1270 ncurrent++; 1271 break; 1272 default: 1273 break; 1274 } 1275 } 1276 1277 adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent); 1278out: 1279 kfree(inq_buff); 1280 kfree(ld_buff); 1281 kfree(currentsd); 1282 return; 1283} 1284 1285static int 1286is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c 1287{ 1288 int verb_len = strlen(verb); 1289 if (len >= verb_len && !memcmp(verb,ptr,verb_len)) 1290 return verb_len; 1291 else 1292 return 0; 1293} 1294 1295static int 1296cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length) 1297{ 1298 int arg_len; 1299 1300 if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) 1301 cciss_update_non_disk_devices(h, hostno); 1302 else 1303 return -EINVAL; 1304 return length; 1305} 1306 1307 1308static int 1309cciss_scsi_proc_info(struct Scsi_Host *sh, 1310 char *buffer, /* data buffer */ 1311 char **start, /* where data in buffer starts */ 1312 off_t offset, /* offset from start of imaginary file */ 1313 int length, /* length of data in buffer */ 1314 int func) /* 0 == read, 1 == write */ 1315{ 1316 1317 int buflen, datalen; 1318 ctlr_info_t *h; 1319 int i; 1320 1321 h = (ctlr_info_t *) sh->hostdata[0]; 1322 if (h == NULL) /* This really shouldn't ever happen. */ 1323 return -EINVAL; 1324 1325 if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */ 1326 buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n", 1327 h->ctlr, sh->host_no); 1328 1329 /* this information is needed by apps to know which cciss 1330 device corresponds to which scsi host number without 1331 having to open a scsi target device node. The device 1332 information is not a duplicate of /proc/scsi/scsi because 1333 the two may be out of sync due to scsi hotplug, rather 1334 this info is for an app to be able to use to know how to 1335 get them back in sync. */ 1336 1337 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { 1338 struct cciss_scsi_dev_t *sd = 1339 &ccissscsi[h->ctlr].dev[i]; 1340 buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d " 1341 "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 1342 sh->host_no, sd->bus, sd->target, sd->lun, 1343 sd->devtype, 1344 sd->scsi3addr[0], sd->scsi3addr[1], 1345 sd->scsi3addr[2], sd->scsi3addr[3], 1346 sd->scsi3addr[4], sd->scsi3addr[5], 1347 sd->scsi3addr[6], sd->scsi3addr[7]); 1348 } 1349 datalen = buflen - offset; 1350 if (datalen < 0) { /* they're reading past EOF. */ 1351 datalen = 0; 1352 *start = buffer+buflen; 1353 } else 1354 *start = buffer + offset; 1355 return(datalen); 1356 } else /* User is writing to /proc/scsi/cciss*?/?* ... */ 1357 return cciss_scsi_user_command(h, sh->host_no, 1358 buffer, length); 1359} 1360 1361/* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci 1362 dma mapping and fills in the scatter gather entries of the 1363 cciss command, c. */ 1364 1365static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c, 1366 struct scsi_cmnd *cmd) 1367{ 1368 unsigned int len; 1369 struct scatterlist *sg; 1370 __u64 addr64; 1371 int request_nsgs, i, chained, sg_index; 1372 struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr; 1373 SGDescriptor_struct *curr_sg; 1374 1375 BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); 1376 1377 chained = 0; 1378 sg_index = 0; 1379 curr_sg = c->SG; 1380 request_nsgs = scsi_dma_map(cmd); 1381 if (request_nsgs) { 1382 scsi_for_each_sg(cmd, sg, request_nsgs, i) { 1383 if (sg_index + 1 == h->max_cmd_sgentries && 1384 !chained && request_nsgs - i > 1) { 1385 chained = 1; 1386 sg_index = 0; 1387 curr_sg = sa->cmd_sg_list[c->cmdindex]; 1388 } 1389 addr64 = (__u64) sg_dma_address(sg); 1390 len = sg_dma_len(sg); 1391 curr_sg[sg_index].Addr.lower = 1392 (__u32) (addr64 & 0x0FFFFFFFFULL); 1393 curr_sg[sg_index].Addr.upper = 1394 (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); 1395 curr_sg[sg_index].Len = len; 1396 curr_sg[sg_index].Ext = 0; 1397 ++sg_index; 1398 } 1399 if (chained) 1400 cciss_map_sg_chain_block(h, c, 1401 sa->cmd_sg_list[c->cmdindex], 1402 (request_nsgs - (h->max_cmd_sgentries - 1)) * 1403 sizeof(SGDescriptor_struct)); 1404 } 1405 /* track how many SG entries we are using */ 1406 if (request_nsgs > h->maxSG) 1407 h->maxSG = request_nsgs; 1408 c->Header.SGTotal = (__u8) request_nsgs + chained; 1409 if (request_nsgs > h->max_cmd_sgentries) 1410 c->Header.SGList = h->max_cmd_sgentries; 1411 else 1412 c->Header.SGList = c->Header.SGTotal; 1413 return; 1414} 1415 1416 1417static int 1418cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) 1419{ 1420 ctlr_info_t *h; 1421 int rc; 1422 unsigned char scsi3addr[8]; 1423 CommandList_struct *c; 1424 unsigned long flags; 1425 1426 // Get the ptr to our adapter structure (hba[i]) out of cmd->host. 1427 // We violate cmd->host privacy here. (Is there another way?) 1428 h = (ctlr_info_t *) cmd->device->host->hostdata[0]; 1429 1430 rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id, 1431 cmd->device->lun, scsi3addr); 1432 if (rc != 0) { 1433 /* the scsi nexus does not match any that we presented... */ 1434 /* pretend to mid layer that we got selection timeout */ 1435 cmd->result = DID_NO_CONNECT << 16; 1436 done(cmd); 1437 /* we might want to think about registering controller itself 1438 as a processor device on the bus so sg binds to it. */ 1439 return 0; 1440 } 1441 1442 /* Ok, we have a reasonable scsi nexus, so send the cmd down, and 1443 see what the device thinks of it. */ 1444 1445 spin_lock_irqsave(&h->lock, flags); 1446 c = scsi_cmd_alloc(h); 1447 spin_unlock_irqrestore(&h->lock, flags); 1448 if (c == NULL) { /* trouble... */ 1449 printk("scsi_cmd_alloc returned NULL!\n"); 1450 /* FIXME: next 3 lines are -> BAD! <- */ 1451 cmd->result = DID_NO_CONNECT << 16; 1452 done(cmd); 1453 return 0; 1454 } 1455 1456 // Fill in the command list header 1457 1458 cmd->scsi_done = done; // save this for use by completion code 1459 1460 /* save c in case we have to abort it */ 1461 cmd->host_scribble = (unsigned char *) c; 1462 1463 c->cmd_type = CMD_SCSI; 1464 c->scsi_cmd = cmd; 1465 c->Header.ReplyQueue = 0; /* unused in simple mode */ 1466 memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); 1467 c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ 1468 1469 // Fill in the request block... 1470 1471 c->Request.Timeout = 0; 1472 memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); 1473 BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB)); 1474 c->Request.CDBLen = cmd->cmd_len; 1475 memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len); 1476 c->Request.Type.Type = TYPE_CMD; 1477 c->Request.Type.Attribute = ATTR_SIMPLE; 1478 switch(cmd->sc_data_direction) 1479 { 1480 case DMA_TO_DEVICE: 1481 c->Request.Type.Direction = XFER_WRITE; 1482 break; 1483 case DMA_FROM_DEVICE: 1484 c->Request.Type.Direction = XFER_READ; 1485 break; 1486 case DMA_NONE: 1487 c->Request.Type.Direction = XFER_NONE; 1488 break; 1489 case DMA_BIDIRECTIONAL: 1490 // This can happen if a buggy application does a scsi passthru 1491 // and sets both inlen and outlen to non-zero. ( see 1492 // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) 1493 1494 c->Request.Type.Direction = XFER_RSVD; 1495 // This is technically wrong, and cciss controllers should 1496 // reject it with CMD_INVALID, which is the most correct 1497 // response, but non-fibre backends appear to let it 1498 // slide by, and give the same results as if this field 1499 // were set correctly. Either way is acceptable for 1500 // our purposes here. 1501 1502 break; 1503 1504 default: 1505 printk("cciss: unknown data direction: %d\n", 1506 cmd->sc_data_direction); 1507 BUG(); 1508 break; 1509 } 1510 cciss_scatter_gather(h, c, cmd); 1511 enqueue_cmd_and_start_io(h, c); 1512 /* the cmd'll come back via intr handler in complete_scsi_command() */ 1513 return 0; 1514} 1515 1516static void cciss_unregister_scsi(ctlr_info_t *h) 1517{ 1518 struct cciss_scsi_adapter_data_t *sa; 1519 struct cciss_scsi_cmd_stack_t *stk; 1520 unsigned long flags; 1521 1522 /* we are being forcibly unloaded, and may not refuse. */ 1523 1524 spin_lock_irqsave(&h->lock, flags); 1525 sa = h->scsi_ctlr; 1526 stk = &sa->cmd_stack; 1527 1528 /* if we weren't ever actually registered, don't unregister */ 1529 if (sa->registered) { 1530 spin_unlock_irqrestore(&h->lock, flags); 1531 scsi_remove_host(sa->scsi_host); 1532 scsi_host_put(sa->scsi_host); 1533 spin_lock_irqsave(&h->lock, flags); 1534 } 1535 1536 /* set scsi_host to NULL so our detect routine will 1537 find us on register */ 1538 sa->scsi_host = NULL; 1539 spin_unlock_irqrestore(&h->lock, flags); 1540 scsi_cmd_stack_free(h); 1541 kfree(sa); 1542} 1543 1544static int cciss_engage_scsi(ctlr_info_t *h) 1545{ 1546 struct cciss_scsi_adapter_data_t *sa; 1547 struct cciss_scsi_cmd_stack_t *stk; 1548 unsigned long flags; 1549 1550 spin_lock_irqsave(&h->lock, flags); 1551 sa = h->scsi_ctlr; 1552 stk = &sa->cmd_stack; 1553 1554 if (sa->registered) { 1555 printk(KERN_INFO "cciss%d: SCSI subsystem already engaged.\n", 1556 h->ctlr); 1557 spin_unlock_irqrestore(&h->lock, flags); 1558 return -ENXIO; 1559 } 1560 sa->registered = 1; 1561 spin_unlock_irqrestore(&h->lock, flags); 1562 cciss_update_non_disk_devices(h, -1); 1563 cciss_scsi_detect(h); 1564 return 0; 1565} 1566 1567static void 1568cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h) 1569{ 1570 unsigned long flags; 1571 1572 CPQ_TAPE_LOCK(h, flags); 1573 seq_printf(seq, 1574 "Sequential access devices: %d\n\n", 1575 ccissscsi[h->ctlr].ndevices); 1576 CPQ_TAPE_UNLOCK(h, flags); 1577} 1578 1579static int wait_for_device_to_become_ready(ctlr_info_t *h, 1580 unsigned char lunaddr[]) 1581{ 1582 int rc; 1583 int count = 0; 1584 int waittime = HZ; 1585 CommandList_struct *c; 1586 1587 c = cmd_alloc(h); 1588 if (!c) { 1589 printk(KERN_WARNING "cciss%d: out of memory in " 1590 "wait_for_device_to_become_ready.\n", h->ctlr); 1591 return IO_ERROR; 1592 } 1593 1594 /* Send test unit ready until device ready, or give up. */ 1595 while (count < 20) { 1596 1597 /* Wait for a bit. do this first, because if we send 1598 * the TUR right away, the reset will just abort it. 1599 */ 1600 schedule_timeout_uninterruptible(waittime); 1601 count++; 1602 1603 /* Increase wait time with each try, up to a point. */ 1604 if (waittime < (HZ * 30)) 1605 waittime = waittime * 2; 1606 1607 /* Send the Test Unit Ready */ 1608 rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0, 1609 lunaddr, TYPE_CMD); 1610 if (rc == 0) 1611 rc = sendcmd_withirq_core(h, c, 0); 1612 1613 (void) process_sendcmd_error(h, c); 1614 1615 if (rc != 0) 1616 goto retry_tur; 1617 1618 if (c->err_info->CommandStatus == CMD_SUCCESS) 1619 break; 1620 1621 if (c->err_info->CommandStatus == CMD_TARGET_STATUS && 1622 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) { 1623 if (c->err_info->SenseInfo[2] == NO_SENSE) 1624 break; 1625 if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) { 1626 unsigned char asc; 1627 asc = c->err_info->SenseInfo[12]; 1628 check_for_unit_attention(h, c); 1629 if (asc == POWER_OR_RESET) 1630 break; 1631 } 1632 } 1633retry_tur: 1634 printk(KERN_WARNING "cciss%d: Waiting %d secs " 1635 "for device to become ready.\n", 1636 h->ctlr, waittime / HZ); 1637 rc = 1; /* device not ready. */ 1638 } 1639 1640 if (rc) 1641 printk("cciss%d: giving up on device.\n", h->ctlr); 1642 else 1643 printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr); 1644 1645 cmd_free(h, c); 1646 return rc; 1647} 1648 1649/* Need at least one of these error handlers to keep ../scsi/hosts.c from 1650 * complaining. Doing a host- or bus-reset can't do anything good here. 1651 * Despite what it might say in scsi_error.c, there may well be commands 1652 * on the controller, as the cciss driver registers twice, once as a block 1653 * device for the logical drives, and once as a scsi device, for any tape 1654 * drives. So we know there are no commands out on the tape drives, but we 1655 * don't know there are no commands on the controller, and it is likely 1656 * that there probably are, as the cciss block device is most commonly used 1657 * as a boot device (embedded controller on HP/Compaq systems.) 1658*/ 1659 1660static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) 1661{ 1662 int rc; 1663 CommandList_struct *cmd_in_trouble; 1664 unsigned char lunaddr[8]; 1665 ctlr_info_t *h; 1666 1667 /* find the controller to which the command to be aborted was sent */ 1668 h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; 1669 if (h == NULL) /* paranoia */ 1670 return FAILED; 1671 printk(KERN_WARNING 1672 "cciss%d: resetting tape drive or medium changer.\n", h->ctlr); 1673 /* find the command that's giving us trouble */ 1674 cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; 1675 if (cmd_in_trouble == NULL) /* paranoia */ 1676 return FAILED; 1677 memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); 1678 /* send a reset to the SCSI LUN which the command was sent to */ 1679 rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr, 1680 TYPE_MSG); 1681 if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0) 1682 return SUCCESS; 1683 printk(KERN_WARNING "cciss%d: resetting device failed.\n", h->ctlr); 1684 return FAILED; 1685} 1686 1687static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) 1688{ 1689 int rc; 1690 CommandList_struct *cmd_to_abort; 1691 unsigned char lunaddr[8]; 1692 ctlr_info_t *h; 1693 1694 /* find the controller to which the command to be aborted was sent */ 1695 h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; 1696 if (h == NULL) /* paranoia */ 1697 return FAILED; 1698 printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", h->ctlr); 1699 1700 /* find the command to be aborted */ 1701 cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; 1702 if (cmd_to_abort == NULL) /* paranoia */ 1703 return FAILED; 1704 memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8); 1705 rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag, 1706 0, 0, lunaddr, TYPE_MSG); 1707 if (rc == 0) 1708 return SUCCESS; 1709 return FAILED; 1710 1711} 1712 1713#else /* no CONFIG_CISS_SCSI_TAPE */ 1714 1715/* If no tape support, then these become defined out of existence */ 1716 1717#define cciss_scsi_setup(cntl_num) 1718 1719#endif /* CONFIG_CISS_SCSI_TAPE */ 1720