drivers/block/cciss_scsi.c

   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
  47 static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
  48         size_t size,
  49         __u8 page_code, unsigned char *scsi3addr,
  50         int cmd_type);
  51
  52 static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool);
  53 static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool);
  54
  55 static int cciss_scsi_proc_info(
  56                 struct Scsi_Host *sh,
  57                 char *buffer, /* data buffer */
  58                 char **start,      /* where data in buffer starts */
  59                 off_t offset,      /* offset from start of imaginary file */
  60                 int length,        /* length of data in buffer */
  61                 int func);         /* 0 == read, 1 == write */
  62
  63 static int cciss_scsi_queue_command (struct scsi_cmnd *cmd,
  64                 void (* done)(struct scsi_cmnd *));
  65 static int cciss_eh_device_reset_handler(struct scsi_cmnd *);
  66 static int cciss_eh_abort_handler(struct scsi_cmnd *);
  67
  68 static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = {
  69         { .name = "cciss0", .ndevices = 0 },
  70         { .name = "cciss1", .ndevices = 0 },
  71         { .name = "cciss2", .ndevices = 0 },
  72         { .name = "cciss3", .ndevices = 0 },
  73         { .name = "cciss4", .ndevices = 0 },
  74         { .name = "cciss5", .ndevices = 0 },
  75         { .name = "cciss6", .ndevices = 0 },
  76         { .name = "cciss7", .ndevices = 0 },
  77 };
  78
  79 static struct scsi_host_template cciss_driver_template = {
  80         .module                 = THIS_MODULE,
  81         .name                   = "cciss",
  82         .proc_name              = "cciss",
  83         .proc_info              = cciss_scsi_proc_info,
  84         .queuecommand           = cciss_scsi_queue_command,
  85         .can_queue              = SCSI_CCISS_CAN_QUEUE,
  86         .this_id                = 7,
  87         .cmd_per_lun            = 1,
  88         .use_clustering         = DISABLE_CLUSTERING,
  89         /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */
  90         .eh_device_reset_handler= cciss_eh_device_reset_handler,
  91         .eh_abort_handler       = cciss_eh_abort_handler,
  92 };
  93
  94 #pragma pack(1)
  95
  96 #define SCSI_PAD_32 8
  97 #define SCSI_PAD_64 8
  98
  99 struct cciss_scsi_cmd_stack_elem_t {
 100         CommandList_struct cmd;
 101         ErrorInfo_struct Err;
 102         __u32 busaddr;
 103         int cmdindex;
 104         u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64];
 105 };
 106
 107 #pragma pack()
 108
 109 #define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \
 110                 CCISS_MAX_SCSI_DEVS_PER_HBA + 2)
 111                         // plus two for init time usage
 112
 113 #pragma pack(1)
 114 struct cciss_scsi_cmd_stack_t {
 115         struct cciss_scsi_cmd_stack_elem_t *pool;
 116         struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE];
 117         dma_addr_t cmd_pool_handle;
 118         int top;
 119 };
 120 #pragma pack()
 121
 122 struct cciss_scsi_adapter_data_t {
 123         struct Scsi_Host *scsi_host;
 124         struct cciss_scsi_cmd_stack_t cmd_stack;
 125         SGDescriptor_struct **cmd_sg_list;
 126         int registered;
 127         spinlock_t lock; // to protect ccissscsi[ctlr];
 128 };
 129
 130 #define CPQ_TAPE_LOCK(ctlr, flags) spin_lock_irqsave( \
 131         &hba[ctlr]->scsi_ctlr->lock, flags);
 132 #define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \
 133         &hba[ctlr]->scsi_ctlr->lock, flags);
 134
 135 static CommandList_struct *
 136 scsi_cmd_alloc(ctlr_info_t *h)
 137 {
 138         /* assume only one process in here at a time, locking done by caller. */
 139         /* use CCISS_LOCK(ctlr) */
 140         /* might be better to rewrite how we allocate scsi commands in a way that */
 141         /* needs no locking at all. */
 142
 143         /* take the top memory chunk off the stack and return it, if any. */
 144         struct cciss_scsi_cmd_stack_elem_t *c;
 145         struct cciss_scsi_adapter_data_t *sa;
 146         struct cciss_scsi_cmd_stack_t *stk;
 147         u64bit temp64;
 148
 149         sa = h->scsi_ctlr;
 150         stk = &sa->cmd_stack;
 151
 152         if (stk->top < 0)
 153                 return NULL;
 154         c = stk->elem[stk->top];
 155         /* memset(c, 0, sizeof(*c)); */
 156         memset(&c->cmd, 0, sizeof(c->cmd));
 157         memset(&c->Err, 0, sizeof(c->Err));
 158         /* set physical addr of cmd and addr of scsi parameters */
 159         c->cmd.busaddr = c->busaddr;
 160         c->cmd.cmdindex = c->cmdindex;
 161         /* (__u32) (stk->cmd_pool_handle +
 162                 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */
 163
 164         temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct));
 165         /* (__u64) (stk->cmd_pool_handle +
 166                 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) +
 167                  sizeof(CommandList_struct)); */
 168         stk->top--;
 169         c->cmd.ErrDesc.Addr.lower = temp64.val32.lower;
 170         c->cmd.ErrDesc.Addr.upper = temp64.val32.upper;
 171         c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct);
 172
 173         c->cmd.ctlr = h->ctlr;
 174         c->cmd.err_info = &c->Err;
 175
 176         return (CommandList_struct *) c;
 177 }
 178
 179 static void
 180 scsi_cmd_free(ctlr_info_t *h, CommandList_struct *cmd)
 181 {
 182         /* assume only one process in here at a time, locking done by caller. */
 183         /* use CCISS_LOCK(ctlr) */
 184         /* drop the free memory chunk on top of the stack. */
 185
 186         struct cciss_scsi_adapter_data_t *sa;
 187         struct cciss_scsi_cmd_stack_t *stk;
 188
 189         sa = h->scsi_ctlr;
 190         stk = &sa->cmd_stack;
 191         stk->top++;
 192         if (stk->top >= CMD_STACK_SIZE) {
 193                 printk("cciss: scsi_cmd_free called too many times.\n");
 194                 BUG();
 195         }
 196         stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) cmd;
 197 }
 198
 199 static int
 200 scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa)
 201 {
 202         int i;
 203         struct cciss_scsi_cmd_stack_t *stk;
 204         size_t size;
 205
 206         sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[ctlr],
 207                 hba[ctlr]->chainsize, CMD_STACK_SIZE);
 208         if (!sa->cmd_sg_list && hba[ctlr]->chainsize > 0)
 209                 return -ENOMEM;
 210
 211         stk = &sa->cmd_stack;
 212         size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
 213
 214         /* Check alignment, see cciss_cmd.h near CommandList_struct def. */
 215         BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
 216         /* pci_alloc_consistent guarantees 32-bit DMA address will be used */
 217         stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
 218                 pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle);
 219
 220         if (stk->pool == NULL) {
 221                 cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
 222                 sa->cmd_sg_list = NULL;
 223                 return -ENOMEM;
 224         }
 225
 226         for (i=0; i<CMD_STACK_SIZE; i++) {
 227                 stk->elem[i] = &stk->pool[i];
 228                 stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle +
 229                         (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i));
 230                 stk->elem[i]->cmdindex = i;
 231         }
 232         stk->top = CMD_STACK_SIZE-1;
 233         return 0;
 234 }
 235
 236 static void
 237 scsi_cmd_stack_free(int ctlr)
 238 {
 239         struct cciss_scsi_adapter_data_t *sa;
 240         struct cciss_scsi_cmd_stack_t *stk;
 241         size_t size;
 242
 243         sa = hba[ctlr]->scsi_ctlr;
 244         stk = &sa->cmd_stack;
 245         if (stk->top != CMD_STACK_SIZE-1) {
 246                 printk( "cciss: %d scsi commands are still outstanding.\n",
 247                         CMD_STACK_SIZE - stk->top);
 248                 // BUG();
 249                 printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk);
 250         }
 251         size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
 252
 253         pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle);
 254         stk->pool = NULL;
 255         cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
 256 }
 257
 258 #if 0
 259 static int xmargin=8;
 260 static int amargin=60;
 261
 262 static void
 263 print_bytes (unsigned char *c, int len, int hex, int ascii)
 264 {
 265
 266         int i;
 267         unsigned char *x;
 268
 269         if (hex)
 270         {
 271                 x = c;
 272                 for (i=0;i<len;i++)
 273                 {
 274                         if ((i % xmargin) == 0 && i>0) printk("\n");
 275                         if ((i % xmargin) == 0) printk("0x%04x:", i);
 276                         printk(" %02x", *x);
 277                         x++;
 278                 }
 279                 printk("\n");
 280         }
 281         if (ascii)
 282         {
 283                 x = c;
 284                 for (i=0;i<len;i++)
 285                 {
 286                         if ((i % amargin) == 0 && i>0) printk("\n");
 287                         if ((i % amargin) == 0) printk("0x%04x:", i);
 288                         if (*x > 26 && *x < 128) printk("%c", *x);
 289                         else printk(".");
 290                         x++;
 291                 }
 292                 printk("\n");
 293         }
 294 }
 295
 296 static void
 297 print_cmd(CommandList_struct *cp)
 298 {
 299         printk("queue:%d\n", cp->Header.ReplyQueue);
 300         printk("sglist:%d\n", cp->Header.SGList);
 301         printk("sgtot:%d\n", cp->Header.SGTotal);
 302         printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper,
 303                         cp->Header.Tag.lower);
 304         printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 305                 cp->Header.LUN.LunAddrBytes[0],
 306                 cp->Header.LUN.LunAddrBytes[1],
 307                 cp->Header.LUN.LunAddrBytes[2],
 308                 cp->Header.LUN.LunAddrBytes[3],
 309                 cp->Header.LUN.LunAddrBytes[4],
 310                 cp->Header.LUN.LunAddrBytes[5],
 311                 cp->Header.LUN.LunAddrBytes[6],
 312                 cp->Header.LUN.LunAddrBytes[7]);
 313         printk("CDBLen:%d\n", cp->Request.CDBLen);
 314         printk("Type:%d\n",cp->Request.Type.Type);
 315         printk("Attr:%d\n",cp->Request.Type.Attribute);
 316         printk(" Dir:%d\n",cp->Request.Type.Direction);
 317         printk("Timeout:%d\n",cp->Request.Timeout);
 318         printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x"
 319                 " %02x %02x %02x %02x %02x %02x %02x %02x\n",
 320                 cp->Request.CDB[0], cp->Request.CDB[1],
 321                 cp->Request.CDB[2], cp->Request.CDB[3],
 322                 cp->Request.CDB[4], cp->Request.CDB[5],
 323                 cp->Request.CDB[6], cp->Request.CDB[7],
 324                 cp->Request.CDB[8], cp->Request.CDB[9],
 325                 cp->Request.CDB[10], cp->Request.CDB[11],
 326                 cp->Request.CDB[12], cp->Request.CDB[13],
 327                 cp->Request.CDB[14], cp->Request.CDB[15]),
 328         printk("edesc.Addr: 0x%08x/0%08x, Len  = %d\n",
 329                 cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower,
 330                         cp->ErrDesc.Len);
 331         printk("sgs..........Errorinfo:\n");
 332         printk("scsistatus:%d\n", cp->err_info->ScsiStatus);
 333         printk("senselen:%d\n", cp->err_info->SenseLen);
 334         printk("cmd status:%d\n", cp->err_info->CommandStatus);
 335         printk("resid cnt:%d\n", cp->err_info->ResidualCnt);
 336         printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size);
 337         printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num);
 338         printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
 339
 340 }
 341
 342 #endif
 343
 344 static int
 345 find_bus_target_lun(int ctlr, int *bus, int *target, int *lun)
 346 {
 347         /* finds an unused bus, target, lun for a new device */
 348         /* assumes hba[ctlr]->scsi_ctlr->lock is held */
 349         int i, found=0;
 350         unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA];
 351
 352         memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA);
 353
 354         target_taken[SELF_SCSI_ID] = 1;
 355         for (i=0;i<ccissscsi[ctlr].ndevices;i++)
 356                 target_taken[ccissscsi[ctlr].dev[i].target] = 1;
 357
 358         for (i=0;i<CCISS_MAX_SCSI_DEVS_PER_HBA;i++) {
 359                 if (!target_taken[i]) {
 360                         *bus = 0; *target=i; *lun = 0; found=1;
 361                         break;
 362                 }
 363         }
 364         return (!found);
 365 }
 366 struct scsi2map {
 367         char scsi3addr[8];
 368         int bus, target, lun;
 369 };
 370
 371 static int
 372 cciss_scsi_add_entry(int ctlr, int hostno,
 373                 struct cciss_scsi_dev_t *device,
 374                 struct scsi2map *added, int *nadded)
 375 {
 376         /* assumes hba[ctlr]->scsi_ctlr->lock is held */
 377         int n = ccissscsi[ctlr].ndevices;
 378         struct cciss_scsi_dev_t *sd;
 379         int i, bus, target, lun;
 380         unsigned char addr1[8], addr2[8];
 381
 382         if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
 383                 printk("cciss%d: Too many devices, "
 384                         "some will be inaccessible.\n", ctlr);
 385                 return -1;
 386         }
 387
 388         bus = target = -1;
 389         lun = 0;
 390         /* Is this device a non-zero lun of a multi-lun device */
 391         /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */
 392         if (device->scsi3addr[4] != 0) {
 393                 /* Search through our list and find the device which */
 394                 /* has the same 8 byte LUN address, excepting byte 4. */
 395                 /* Assign the same bus and target for this new LUN. */
 396                 /* Use the logical unit number from the firmware. */
 397                 memcpy(addr1, device->scsi3addr, 8);
 398                 addr1[4] = 0;
 399                 for (i = 0; i < n; i++) {
 400                         sd = &ccissscsi[ctlr].dev[i];
 401                         memcpy(addr2, sd->scsi3addr, 8);
 402                         addr2[4] = 0;
 403                         /* differ only in byte 4? */
 404                         if (memcmp(addr1, addr2, 8) == 0) {
 405                                 bus = sd->bus;
 406                                 target = sd->target;
 407                                 lun = device->scsi3addr[4];
 408                                 break;
 409                         }
 410                 }
 411         }
 412
 413         sd = &ccissscsi[ctlr].dev[n];
 414         if (lun == 0) {
 415                 if (find_bus_target_lun(ctlr,
 416                         &sd->bus, &sd->target, &sd->lun) != 0)
 417                         return -1;
 418         } else {
 419                 sd->bus = bus;
 420                 sd->target = target;
 421                 sd->lun = lun;
 422         }
 423         added[*nadded].bus = sd->bus;
 424         added[*nadded].target = sd->target;
 425         added[*nadded].lun = sd->lun;
 426         (*nadded)++;
 427
 428         memcpy(sd->scsi3addr, device->scsi3addr, 8);
 429         memcpy(sd->vendor, device->vendor, sizeof(sd->vendor));
 430         memcpy(sd->revision, device->revision, sizeof(sd->revision));
 431         memcpy(sd->device_id, device->device_id, sizeof(sd->device_id));
 432         sd->devtype = device->devtype;
 433
 434         ccissscsi[ctlr].ndevices++;
 435
 436         /* initially, (before registering with scsi layer) we don't
 437            know our hostno and we don't want to print anything first
 438            time anyway (the scsi layer's inquiries will show that info) */
 439         if (hostno != -1)
 440                 printk("cciss%d: %s device c%db%dt%dl%d added.\n",
 441                         ctlr, scsi_device_type(sd->devtype), hostno,
 442                         sd->bus, sd->target, sd->lun);
 443         return 0;
 444 }
 445
 446 static void
 447 cciss_scsi_remove_entry(int ctlr, int hostno, int entry,
 448         struct scsi2map *removed, int *nremoved)
 449 {
 450         /* assumes hba[ctlr]->scsi_ctlr->lock is held */
 451         int i;
 452         struct cciss_scsi_dev_t sd;
 453
 454         if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return;
 455         sd = ccissscsi[ctlr].dev[entry];
 456         removed[*nremoved].bus    = sd.bus;
 457         removed[*nremoved].target = sd.target;
 458         removed[*nremoved].lun    = sd.lun;
 459         (*nremoved)++;
 460         for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++)
 461                 ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1];
 462         ccissscsi[ctlr].ndevices--;
 463         printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
 464                 ctlr, scsi_device_type(sd.devtype), hostno,
 465                         sd.bus, sd.target, sd.lun);
 466 }
 467
 468
 469 #define SCSI3ADDR_EQ(a,b) ( \
 470         (a)[7] == (b)[7] && \
 471         (a)[6] == (b)[6] && \
 472         (a)[5] == (b)[5] && \
 473         (a)[4] == (b)[4] && \
 474         (a)[3] == (b)[3] && \
 475         (a)[2] == (b)[2] && \
 476         (a)[1] == (b)[1] && \
 477         (a)[0] == (b)[0])
 478
 479 static void fixup_botched_add(int ctlr, char *scsi3addr)
 480 {
 481         /* called when scsi_add_device fails in order to re-adjust */
 482         /* ccissscsi[] to match the mid layer's view. */
 483         unsigned long flags;
 484         int i, j;
 485         CPQ_TAPE_LOCK(ctlr, flags);
 486         for (i = 0; i < ccissscsi[ctlr].ndevices; i++) {
 487                 if (memcmp(scsi3addr,
 488                                 ccissscsi[ctlr].dev[i].scsi3addr, 8) == 0) {
 489                         for (j = i; j < ccissscsi[ctlr].ndevices-1; j++)
 490                                 ccissscsi[ctlr].dev[j] =
 491                                         ccissscsi[ctlr].dev[j+1];
 492                         ccissscsi[ctlr].ndevices--;
 493                         break;
 494                 }
 495         }
 496         CPQ_TAPE_UNLOCK(ctlr, flags);
 497 }
 498
 499 static int device_is_the_same(struct cciss_scsi_dev_t *dev1,
 500         struct cciss_scsi_dev_t *dev2)
 501 {
 502         return dev1->devtype == dev2->devtype &&
 503                 memcmp(dev1->scsi3addr, dev2->scsi3addr,
 504                         sizeof(dev1->scsi3addr)) == 0 &&
 505                 memcmp(dev1->device_id, dev2->device_id,
 506                         sizeof(dev1->device_id)) == 0 &&
 507                 memcmp(dev1->vendor, dev2->vendor,
 508                         sizeof(dev1->vendor)) == 0 &&
 509                 memcmp(dev1->model, dev2->model,
 510                         sizeof(dev1->model)) == 0 &&
 511                 memcmp(dev1->revision, dev2->revision,
 512                         sizeof(dev1->revision)) == 0;
 513 }
 514
 515 static int
 516 adjust_cciss_scsi_table(int ctlr, int hostno,
 517         struct cciss_scsi_dev_t sd[], int nsds)
 518 {
 519         /* sd contains scsi3 addresses and devtypes, but
 520            bus target and lun are not filled in.  This funciton
 521            takes what's in sd to be the current and adjusts
 522            ccissscsi[] to be in line with what's in sd. */
 523
 524         int i,j, found, changes=0;
 525         struct cciss_scsi_dev_t *csd;
 526         unsigned long flags;
 527         struct scsi2map *added, *removed;
 528         int nadded, nremoved;
 529         struct Scsi_Host *sh = NULL;
 530
 531         added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA,
 532                         GFP_KERNEL);
 533         removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA,
 534                         GFP_KERNEL);
 535
 536         if (!added || !removed) {
 537                 printk(KERN_WARNING "cciss%d: Out of memory in "
 538                         "adjust_cciss_scsi_table\n", ctlr);
 539                 goto free_and_out;
 540         }
 541
 542         CPQ_TAPE_LOCK(ctlr, flags);
 543
 544         if (hostno != -1)  /* if it's not the first time... */
 545                 sh = hba[ctlr]->scsi_ctlr->scsi_host;
 546
 547         /* find any devices in ccissscsi[] that are not in
 548            sd[] and remove them from ccissscsi[] */
 549
 550         i = 0;
 551         nremoved = 0;
 552         nadded = 0;
 553         while(i<ccissscsi[ctlr].ndevices) {
 554                 csd = &ccissscsi[ctlr].dev[i];
 555                 found=0;
 556                 for (j=0;j<nsds;j++) {
 557                         if (SCSI3ADDR_EQ(sd[j].scsi3addr,
 558                                 csd->scsi3addr)) {
 559                                 if (device_is_the_same(&sd[j], csd))
 560                                         found=2;
 561                                 else
 562                                         found=1;
 563                                 break;
 564                         }
 565                 }
 566
 567                 if (found == 0) { /* device no longer present. */
 568                         changes++;
 569                         /* printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
 570                                 ctlr, scsi_device_type(csd->devtype), hostno,
 571                                         csd->bus, csd->target, csd->lun); */
 572                         cciss_scsi_remove_entry(ctlr, hostno, i,
 573                                 removed, &nremoved);
 574                         /* remove ^^^, hence i not incremented */
 575                 } else if (found == 1) { /* device is different in some way */
 576                         changes++;
 577                         printk("cciss%d: device c%db%dt%dl%d has changed.\n",
 578                                 ctlr, hostno, csd->bus, csd->target, csd->lun);
 579                         cciss_scsi_remove_entry(ctlr, hostno, i,
 580                                 removed, &nremoved);
 581                         /* remove ^^^, hence i not incremented */
 582                         if (cciss_scsi_add_entry(ctlr, hostno, &sd[j],
 583                                 added, &nadded) != 0)
 584                                 /* we just removed one, so add can't fail. */
 585                                         BUG();
 586                         csd->devtype = sd[j].devtype;
 587                         memcpy(csd->device_id, sd[j].device_id,
 588                                 sizeof(csd->device_id));
 589                         memcpy(csd->vendor, sd[j].vendor,
 590                                 sizeof(csd->vendor));
 591                         memcpy(csd->model, sd[j].model,
 592                                 sizeof(csd->model));
 593                         memcpy(csd->revision, sd[j].revision,
 594                                 sizeof(csd->revision));
 595                 } else          /* device is same as it ever was, */
 596                         i++;    /* so just move along. */
 597         }
 598
 599         /* Now, make sure every device listed in sd[] is also
 600            listed in ccissscsi[], adding them if they aren't found */
 601
 602         for (i=0;i<nsds;i++) {
 603                 found=0;
 604                 for (j=0;j<ccissscsi[ctlr].ndevices;j++) {
 605                         csd = &ccissscsi[ctlr].dev[j];
 606                         if (SCSI3ADDR_EQ(sd[i].scsi3addr,
 607                                 csd->scsi3addr)) {
 608                                 if (device_is_the_same(&sd[i], csd))
 609                                         found=2;        /* found device */
 610                                 else
 611                                         found=1;        /* found a bug. */
 612                                 break;
 613                         }
 614                 }
 615                 if (!found) {
 616                         changes++;
 617                         if (cciss_scsi_add_entry(ctlr, hostno, &sd[i],
 618                                 added, &nadded) != 0)
 619                                 break;
 620                 } else if (found == 1) {
 621                         /* should never happen... */
 622                         changes++;
 623                         printk(KERN_WARNING "cciss%d: device "
 624                                 "unexpectedly changed\n", ctlr);
 625                         /* but if it does happen, we just ignore that device */
 626                 }
 627         }
 628         CPQ_TAPE_UNLOCK(ctlr, flags);
 629
 630         /* Don't notify scsi mid layer of any changes the first time through */
 631         /* (or if there are no changes) scsi_scan_host will do it later the */
 632         /* first time through. */
 633         if (hostno == -1 || !changes)
 634                 goto free_and_out;
 635
 636         /* Notify scsi mid layer of any removed devices */
 637         for (i = 0; i < nremoved; i++) {
 638                 struct scsi_device *sdev =
 639                         scsi_device_lookup(sh, removed[i].bus,
 640                                 removed[i].target, removed[i].lun);
 641                 if (sdev != NULL) {
 642                         scsi_remove_device(sdev);
 643                         scsi_device_put(sdev);
 644                 } else {
 645                         /* We don't expect to get here. */
 646                         /* future cmds to this device will get selection */
 647                         /* timeout as if the device was gone. */
 648                         printk(KERN_WARNING "cciss%d: didn't find "
 649                                 "c%db%dt%dl%d\n for removal.",
 650                                 ctlr, hostno, removed[i].bus,
 651                                 removed[i].target, removed[i].lun);
 652                 }
 653         }
 654
 655         /* Notify scsi mid layer of any added devices */
 656         for (i = 0; i < nadded; i++) {
 657                 int rc;
 658                 rc = scsi_add_device(sh, added[i].bus,
 659                         added[i].target, added[i].lun);
 660                 if (rc == 0)
 661                         continue;
 662                 printk(KERN_WARNING "cciss%d: scsi_add_device "
 663                         "c%db%dt%dl%d failed, device not added.\n",
 664                         ctlr, hostno,
 665                         added[i].bus, added[i].target, added[i].lun);
 666                 /* now we have to remove it from ccissscsi, */
 667                 /* since it didn't get added to scsi mid layer */
 668                 fixup_botched_add(ctlr, added[i].scsi3addr);
 669         }
 670
 671 free_and_out:
 672         kfree(added);
 673         kfree(removed);
 674         return 0;
 675 }
 676
 677 static int
 678 lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr)
 679 {
 680         int i;
 681         struct cciss_scsi_dev_t *sd;
 682         unsigned long flags;
 683
 684         CPQ_TAPE_LOCK(ctlr, flags);
 685         for (i=0;i<ccissscsi[ctlr].ndevices;i++) {
 686                 sd = &ccissscsi[ctlr].dev[i];
 687                 if (sd->bus == bus &&
 688                     sd->target == target &&
 689                     sd->lun == lun) {
 690                         memcpy(scsi3addr, &sd->scsi3addr[0], 8);
 691                         CPQ_TAPE_UNLOCK(ctlr, flags);
 692                         return 0;
 693                 }
 694         }
 695         CPQ_TAPE_UNLOCK(ctlr, flags);
 696         return -1;
 697 }
 698
 699 static void
 700 cciss_scsi_setup(int cntl_num)
 701 {
 702         struct cciss_scsi_adapter_data_t * shba;
 703
 704         ccissscsi[cntl_num].ndevices = 0;
 705         shba = (struct cciss_scsi_adapter_data_t *)
 706                 kmalloc(sizeof(*shba), GFP_KERNEL);
 707         if (shba == NULL)
 708                 return;
 709         shba->scsi_host = NULL;
 710         spin_lock_init(&shba->lock);
 711         shba->registered = 0;
 712         if (scsi_cmd_stack_setup(cntl_num, shba) != 0) {
 713                 kfree(shba);
 714                 shba = NULL;
 715         }
 716         hba[cntl_num]->scsi_ctlr = shba;
 717         return;
 718 }
 719
 720 static void
 721 complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag)
 722 {
 723         struct scsi_cmnd *cmd;
 724         ctlr_info_t *ctlr;
 725         ErrorInfo_struct *ei;
 726
 727         ei = cp->err_info;
 728
 729         /* First, see if it was a message rather than a command */
 730         if (cp->Request.Type.Type == TYPE_MSG)  {
 731                 cp->cmd_type = CMD_MSG_DONE;
 732                 return;
 733         }
 734
 735         cmd = (struct scsi_cmnd *) cp->scsi_cmd;
 736         ctlr = hba[cp->ctlr];
 737
 738         scsi_dma_unmap(cmd);
 739         if (cp->Header.SGTotal > ctlr->max_cmd_sgentries)
 740                 cciss_unmap_sg_chain_block(ctlr, cp);
 741
 742         cmd->result = (DID_OK << 16);           /* host byte */
 743         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
 744         /* cmd->result |= (GOOD < 1); */                /* status byte */
 745
 746         cmd->result |= (ei->ScsiStatus);
 747         /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus);  */
 748
 749         /* copy the sense data whether we need to or not. */
 750
 751         memcpy(cmd->sense_buffer, ei->SenseInfo,
 752                 ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
 753                         SCSI_SENSE_BUFFERSIZE :
 754                         ei->SenseLen);
 755         scsi_set_resid(cmd, ei->ResidualCnt);
 756
 757         if(ei->CommandStatus != 0)
 758         { /* an error has occurred */
 759                 switch(ei->CommandStatus)
 760                 {
 761                         case CMD_TARGET_STATUS:
 762                                 /* Pass it up to the upper layers... */
 763                                 if( ei->ScsiStatus)
 764                                 {
 765 #if 0
 766                                         printk(KERN_WARNING "cciss: cmd %p "
 767                                         "has SCSI Status = %x\n",
 768                                                 cp,
 769                                                 ei->ScsiStatus);
 770 #endif
 771                                         cmd->result |= (ei->ScsiStatus << 1);
 772                                 }
 773                                 else {  /* scsi status is zero??? How??? */
 774
 775         /* Ordinarily, this case should never happen, but there is a bug
 776            in some released firmware revisions that allows it to happen
 777            if, for example, a 4100 backplane loses power and the tape
 778            drive is in it.  We assume that it's a fatal error of some
 779            kind because we can't show that it wasn't. We will make it
 780            look like selection timeout since that is the most common
 781            reason for this to occur, and it's severe enough. */
 782
 783                                         cmd->result = DID_NO_CONNECT << 16;
 784                                 }
 785                         break;
 786                         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
 787                         break;
 788                         case CMD_DATA_OVERRUN:
 789                                 printk(KERN_WARNING "cciss: cp %p has"
 790                                         " completed with data overrun "
 791                                         "reported\n", cp);
 792                         break;
 793                         case CMD_INVALID: {
 794                                 /* print_bytes(cp, sizeof(*cp), 1, 0);
 795                                 print_cmd(cp); */
 796      /* We get CMD_INVALID if you address a non-existent tape drive instead
 797         of a selection timeout (no response).  You will see this if you yank
 798         out a tape drive, then try to access it. This is kind of a shame
 799         because it means that any other CMD_INVALID (e.g. driver bug) will
 800         get interpreted as a missing target. */
 801                                 cmd->result = DID_NO_CONNECT << 16;
 802                                 }
 803                         break;
 804                         case CMD_PROTOCOL_ERR:
 805                                 printk(KERN_WARNING "cciss: cp %p has "
 806                                         "protocol error \n", cp);
 807                         break;
 808                         case CMD_HARDWARE_ERR:
 809                                 cmd->result = DID_ERROR << 16;
 810                                 printk(KERN_WARNING "cciss: cp %p had "
 811                                         " hardware error\n", cp);
 812                         break;
 813                         case CMD_CONNECTION_LOST:
 814                                 cmd->result = DID_ERROR << 16;
 815                                 printk(KERN_WARNING "cciss: cp %p had "
 816                                         "connection lost\n", cp);
 817                         break;
 818                         case CMD_ABORTED:
 819                                 cmd->result = DID_ABORT << 16;
 820                                 printk(KERN_WARNING "cciss: cp %p was "
 821                                         "aborted\n", cp);
 822                         break;
 823                         case CMD_ABORT_FAILED:
 824                                 cmd->result = DID_ERROR << 16;
 825                                 printk(KERN_WARNING "cciss: cp %p reports "
 826                                         "abort failed\n", cp);
 827                         break;
 828                         case CMD_UNSOLICITED_ABORT:
 829                                 cmd->result = DID_ABORT << 16;
 830                                 printk(KERN_WARNING "cciss: cp %p aborted "
 831                                         "do to an unsolicited abort\n", cp);
 832                         break;
 833                         case CMD_TIMEOUT:
 834                                 cmd->result = DID_TIME_OUT << 16;
 835                                 printk(KERN_WARNING "cciss: cp %p timedout\n",
 836                                         cp);
 837                         break;
 838                         default:
 839                                 cmd->result = DID_ERROR << 16;
 840                                 printk(KERN_WARNING "cciss: cp %p returned "
 841                                         "unknown status %x\n", cp,
 842                                                 ei->CommandStatus);
 843                 }
 844         }
 845         // printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel,
 846         //      cmd->target, cmd->lun);
 847         cmd->scsi_done(cmd);
 848         scsi_cmd_free(ctlr, cp);
 849 }
 850
 851 static int
 852 cciss_scsi_detect(int ctlr)
 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 = hba[ctlr]->maxsgentries;
 864         sh->max_cmd_len = MAX_COMMAND_SIZE;
 865
 866         ((struct cciss_scsi_adapter_data_t *)
 867                 hba[ctlr]->scsi_ctlr)->scsi_host = sh;
 868         sh->hostdata[0] = (unsigned long) hba[ctlr];
 869         sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT];
 870         sh->unique_id = sh->irq;
 871         error = scsi_add_host(sh, &hba[ctlr]->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
 883 static void
 884 cciss_unmap_one(struct pci_dev *pdev,
 885                 CommandList_struct *cp,
 886                 size_t buflen,
 887                 int data_direction)
 888 {
 889         u64bit addr64;
 890
 891         addr64.val32.lower = cp->SG[0].Addr.lower;
 892         addr64.val32.upper = cp->SG[0].Addr.upper;
 893         pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction);
 894 }
 895
 896 static void
 897 cciss_map_one(struct pci_dev *pdev,
 898                 CommandList_struct *cp,
 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         cp->SG[0].Addr.lower =
 907           (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
 908         cp->SG[0].Addr.upper =
 909           (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
 910         cp->SG[0].Len = buflen;
 911         cp->Header.SGList = (__u8) 1;   /* no. SGs contig in this cmd */
 912         cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
 913 }
 914
 915 static int
 916 cciss_scsi_do_simple_cmd(ctlr_info_t *c,
 917                         CommandList_struct *cp,
 918                         unsigned char *scsi3addr,
 919                         unsigned char *cdb,
 920                         unsigned char cdblen,
 921                         unsigned char *buf, int bufsize,
 922                         int direction)
 923 {
 924         unsigned long flags;
 925         DECLARE_COMPLETION_ONSTACK(wait);
 926
 927         cp->cmd_type = CMD_IOCTL_PEND;          // treat this like an ioctl
 928         cp->scsi_cmd = NULL;
 929         cp->Header.ReplyQueue = 0;  // unused in simple mode
 930         memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN));
 931         cp->Header.Tag.lower = cp->busaddr;  // Use k. address of cmd as tag
 932         // Fill in the request block...
 933
 934         /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n",
 935                 scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
 936                 scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */
 937
 938         memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB));
 939         memcpy(cp->Request.CDB, cdb, cdblen);
 940         cp->Request.Timeout = 0;
 941         cp->Request.CDBLen = cdblen;
 942         cp->Request.Type.Type = TYPE_CMD;
 943         cp->Request.Type.Attribute = ATTR_SIMPLE;
 944         cp->Request.Type.Direction = direction;
 945
 946         /* Fill in the SG list and do dma mapping */
 947         cciss_map_one(c->pdev, cp, (unsigned char *) buf,
 948                         bufsize, DMA_FROM_DEVICE);
 949
 950         cp->waiting = &wait;
 951
 952         /* Put the request on the tail of the request queue */
 953         spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
 954         addQ(&c->reqQ, cp);
 955         c->Qdepth++;
 956         start_io(c);
 957         spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
 958
 959         wait_for_completion(&wait);
 960
 961         /* undo the dma mapping */
 962         cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE);
 963         return(0);
 964 }
 965
 966 static void
 967 cciss_scsi_interpret_error(CommandList_struct *cp)
 968 {
 969         ErrorInfo_struct *ei;
 970
 971         ei = cp->err_info;
 972         switch(ei->CommandStatus)
 973         {
 974                 case CMD_TARGET_STATUS:
 975                         printk(KERN_WARNING "cciss: cmd %p has "
 976                                 "completed with errors\n", cp);
 977                         printk(KERN_WARNING "cciss: cmd %p "
 978                                 "has SCSI Status = %x\n",
 979                                         cp,
 980                                         ei->ScsiStatus);
 981                         if (ei->ScsiStatus == 0)
 982                                 printk(KERN_WARNING
 983                                 "cciss:SCSI status is abnormally zero.  "
 984                                 "(probably indicates selection timeout "
 985                                 "reported incorrectly due to a known "
 986                                 "firmware bug, circa July, 2001.)\n");
 987                 break;
 988                 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
 989                         printk("UNDERRUN\n");
 990                 break;
 991                 case CMD_DATA_OVERRUN:
 992                         printk(KERN_WARNING "cciss: cp %p has"
 993                                 " completed with data overrun "
 994                                 "reported\n", cp);
 995                 break;
 996                 case CMD_INVALID: {
 997                         /* controller unfortunately reports SCSI passthru's */
 998                         /* to non-existent targets as invalid commands. */
 999                         printk(KERN_WARNING "cciss: cp %p is "
1000                                 "reported invalid (probably means "
1001                                 "target device no longer present)\n",
1002                                 cp);
1003                         /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
1004                         print_cmd(cp);  */
1005                         }
1006                 break;
1007                 case CMD_PROTOCOL_ERR:
1008                         printk(KERN_WARNING "cciss: cp %p has "
1009                                 "protocol error \n", cp);
1010                 break;
1011                 case CMD_HARDWARE_ERR:
1012                         /* cmd->result = DID_ERROR << 16; */
1013                         printk(KERN_WARNING "cciss: cp %p had "
1014                                 " hardware error\n", cp);
1015                 break;
1016                 case CMD_CONNECTION_LOST:
1017                         printk(KERN_WARNING "cciss: cp %p had "
1018                                 "connection lost\n", cp);
1019                 break;
1020                 case CMD_ABORTED:
1021                         printk(KERN_WARNING "cciss: cp %p was "
1022                                 "aborted\n", cp);
1023                 break;
1024                 case CMD_ABORT_FAILED:
1025                         printk(KERN_WARNING "cciss: cp %p reports "
1026                                 "abort failed\n", cp);
1027                 break;
1028                 case CMD_UNSOLICITED_ABORT:
1029                         printk(KERN_WARNING "cciss: cp %p aborted "
1030                                 "do to an unsolicited abort\n", cp);
1031                 break;
1032                 case CMD_TIMEOUT:
1033                         printk(KERN_WARNING "cciss: cp %p timedout\n",
1034                                 cp);
1035                 break;
1036                 default:
1037                         printk(KERN_WARNING "cciss: cp %p returned "
1038                                 "unknown status %x\n", cp,
1039                                         ei->CommandStatus);
1040         }
1041 }
1042
1043 static int
1044 cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr,
1045         unsigned char page, unsigned char *buf,
1046         unsigned char bufsize)
1047 {
1048         int rc;
1049         CommandList_struct *cp;
1050         char cdb[6];
1051         ErrorInfo_struct *ei;
1052         unsigned long flags;
1053
1054         spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
1055         cp = scsi_cmd_alloc(c);
1056         spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
1057
1058         if (cp == NULL) {                       /* trouble... */
1059                 printk("cmd_alloc returned NULL!\n");
1060                 return -1;
1061         }
1062
1063         ei = cp->err_info;
1064
1065         cdb[0] = CISS_INQUIRY;
1066         cdb[1] = (page != 0);
1067         cdb[2] = page;
1068         cdb[3] = 0;
1069         cdb[4] = bufsize;
1070         cdb[5] = 0;
1071         rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, cdb,
1072                                 6, buf, bufsize, XFER_READ);
1073
1074         if (rc != 0) return rc; /* something went wrong */
1075
1076         if (ei->CommandStatus != 0 &&
1077             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1078                 cciss_scsi_interpret_error(cp);
1079                 rc = -1;
1080         }
1081         spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
1082         scsi_cmd_free(c, cp);
1083         spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
1084         return rc;
1085 }
1086
1087 /* Get the device id from inquiry page 0x83 */
1088 static int cciss_scsi_get_device_id(ctlr_info_t *c, unsigned char *scsi3addr,
1089         unsigned char *device_id, int buflen)
1090 {
1091         int rc;
1092         unsigned char *buf;
1093
1094         if (buflen > 16)
1095                 buflen = 16;
1096         buf = kzalloc(64, GFP_KERNEL);
1097         if (!buf)
1098                 return -1;
1099         rc = cciss_scsi_do_inquiry(c, scsi3addr, 0x83, buf, 64);
1100         if (rc == 0)
1101                 memcpy(device_id, &buf[8], buflen);
1102         kfree(buf);
1103         return rc != 0;
1104 }
1105
1106 static int
1107 cciss_scsi_do_report_phys_luns(ctlr_info_t *c,
1108                 ReportLunData_struct *buf, int bufsize)
1109 {
1110         int rc;
1111         CommandList_struct *cp;
1112         unsigned char cdb[12];
1113         unsigned char scsi3addr[8];
1114         ErrorInfo_struct *ei;
1115         unsigned long flags;
1116
1117         spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
1118         cp = scsi_cmd_alloc(c);
1119         spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
1120         if (cp == NULL) {                       /* trouble... */
1121                 printk("cmd_alloc returned NULL!\n");
1122                 return -1;
1123         }
1124
1125         memset(&scsi3addr[0], 0, 8); /* address the controller */
1126         cdb[0] = CISS_REPORT_PHYS;
1127         cdb[1] = 0;
1128         cdb[2] = 0;
1129         cdb[3] = 0;
1130         cdb[4] = 0;
1131         cdb[5] = 0;
1132         cdb[6] = (bufsize >> 24) & 0xFF;  //MSB
1133         cdb[7] = (bufsize >> 16) & 0xFF;
1134         cdb[8] = (bufsize >> 8) & 0xFF;
1135         cdb[9] = bufsize & 0xFF;
1136         cdb[10] = 0;
1137         cdb[11] = 0;
1138
1139         rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr,
1140                                 cdb, 12,
1141                                 (unsigned char *) buf,
1142                                 bufsize, XFER_READ);
1143
1144         if (rc != 0) return rc; /* something went wrong */
1145
1146         ei = cp->err_info;
1147         if (ei->CommandStatus != 0 &&
1148             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1149                 cciss_scsi_interpret_error(cp);
1150                 rc = -1;
1151         }
1152         spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
1153         scsi_cmd_free(c, cp);
1154         spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
1155         return rc;
1156 }
1157
1158 static void
1159 cciss_update_non_disk_devices(int cntl_num, int hostno)
1160 {
1161         /* the idea here is we could get notified from /proc
1162            that some devices have changed, so we do a report
1163            physical luns cmd, and adjust our list of devices
1164            accordingly.  (We can't rely on the scsi-mid layer just
1165            doing inquiries, because the "busses" that the scsi
1166            mid-layer probes are totally fabricated by this driver,
1167            so new devices wouldn't show up.
1168
1169            the scsi3addr's of devices won't change so long as the
1170            adapter is not reset.  That means we can rescan and
1171            tell which devices we already know about, vs. new
1172            devices, vs.  disappearing devices.
1173
1174            Also, if you yank out a tape drive, then put in a disk
1175            in it's place, (say, a configured volume from another
1176            array controller for instance)  _don't_ poke this driver
1177            (so it thinks it's still a tape, but _do_ poke the scsi
1178            mid layer, so it does an inquiry... the scsi mid layer
1179            will see the physical disk.  This would be bad.  Need to
1180            think about how to prevent that.  One idea would be to
1181            snoop all scsi responses and if an inquiry repsonse comes
1182            back that reports a disk, chuck it an return selection
1183            timeout instead and adjust our table...  Not sure i like
1184            that though.
1185
1186          */
1187 #define OBDR_TAPE_INQ_SIZE 49
1188 #define OBDR_TAPE_SIG "$DR-10"
1189         ReportLunData_struct *ld_buff;
1190         unsigned char *inq_buff;
1191         unsigned char scsi3addr[8];
1192         ctlr_info_t *c;
1193         __u32 num_luns=0;
1194         unsigned char *ch;
1195         struct cciss_scsi_dev_t *currentsd, *this_device;
1196         int ncurrent=0;
1197         int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
1198         int i;
1199
1200         c = (ctlr_info_t *) hba[cntl_num];
1201         ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
1202         inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1203         currentsd = kzalloc(sizeof(*currentsd) *
1204                         (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL);
1205         if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) {
1206                 printk(KERN_ERR "cciss: out of memory\n");
1207                 goto out;
1208         }
1209         this_device = &currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
1210         if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) {
1211                 ch = &ld_buff->LUNListLength[0];
1212                 num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8;
1213                 if (num_luns > CISS_MAX_PHYS_LUN) {
1214                         printk(KERN_WARNING
1215                                 "cciss: Maximum physical LUNs (%d) exceeded.  "
1216                                 "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN,
1217                                 num_luns - CISS_MAX_PHYS_LUN);
1218                         num_luns = CISS_MAX_PHYS_LUN;
1219                 }
1220         }
1221         else {
1222                 printk(KERN_ERR  "cciss: Report physical LUNs failed.\n");
1223                 goto out;
1224         }
1225
1226
1227         /* adjust our table of devices */
1228         for (i = 0; i < num_luns; i++) {
1229                 /* for each physical lun, do an inquiry */
1230                 if (ld_buff->LUN[i][3] & 0xC0) continue;
1231                 memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
1232                 memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8);
1233
1234                 if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, 0, inq_buff,
1235                         (unsigned char) OBDR_TAPE_INQ_SIZE) != 0)
1236                         /* Inquiry failed (msg printed already) */
1237                         continue; /* so we will skip this device. */
1238
1239                 this_device->devtype = (inq_buff[0] & 0x1f);
1240                 this_device->bus = -1;
1241                 this_device->target = -1;
1242                 this_device->lun = -1;
1243                 memcpy(this_device->scsi3addr, scsi3addr, 8);
1244                 memcpy(this_device->vendor, &inq_buff[8],
1245                         sizeof(this_device->vendor));
1246                 memcpy(this_device->model, &inq_buff[16],
1247                         sizeof(this_device->model));
1248                 memcpy(this_device->revision, &inq_buff[32],
1249                         sizeof(this_device->revision));
1250                 memset(this_device->device_id, 0,
1251                         sizeof(this_device->device_id));
1252                 cciss_scsi_get_device_id(hba[cntl_num], scsi3addr,
1253                         this_device->device_id, sizeof(this_device->device_id));
1254
1255                 switch (this_device->devtype)
1256                 {
1257                   case 0x05: /* CD-ROM */ {
1258
1259                         /* We don't *really* support actual CD-ROM devices,
1260                          * just this "One Button Disaster Recovery" tape drive
1261                          * which temporarily pretends to be a CD-ROM drive.
1262                          * So we check that the device is really an OBDR tape
1263                          * device by checking for "$DR-10" in bytes 43-48 of
1264                          * the inquiry data.
1265                          */
1266                                 char obdr_sig[7];
1267
1268                                 strncpy(obdr_sig, &inq_buff[43], 6);
1269                                 obdr_sig[6] = '\0';
1270                                 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1271                                         /* Not OBDR device, ignore it. */
1272                                         break;
1273                         }
1274                         /* fall through . . . */
1275                   case 0x01: /* sequential access, (tape) */
1276                   case 0x08: /* medium changer */
1277                         if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
1278                                 printk(KERN_INFO "cciss%d: %s ignored, "
1279                                         "too many devices.\n", cntl_num,
1280                                         scsi_device_type(this_device->devtype));
1281                                 break;
1282                         }
1283                         currentsd[ncurrent] = *this_device;
1284                         ncurrent++;
1285                         break;
1286                   default:
1287                         break;
1288                 }
1289         }
1290
1291         adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent);
1292 out:
1293         kfree(inq_buff);
1294         kfree(ld_buff);
1295         kfree(currentsd);
1296         return;
1297 }
1298
1299 static int
1300 is_keyword(char *ptr, int len, char *verb)  // Thanks to ncr53c8xx.c
1301 {
1302         int verb_len = strlen(verb);
1303         if (len >= verb_len && !memcmp(verb,ptr,verb_len))
1304                 return verb_len;
1305         else
1306                 return 0;
1307 }
1308
1309 static int
1310 cciss_scsi_user_command(int ctlr, int hostno, char *buffer, int length)
1311 {
1312         int arg_len;
1313
1314         if ((arg_len = is_keyword(buffer, length, "rescan")) != 0)
1315                 cciss_update_non_disk_devices(ctlr, hostno);
1316         else
1317                 return -EINVAL;
1318         return length;
1319 }
1320
1321
1322 static int
1323 cciss_scsi_proc_info(struct Scsi_Host *sh,
1324                 char *buffer, /* data buffer */
1325                 char **start,      /* where data in buffer starts */
1326                 off_t offset,      /* offset from start of imaginary file */
1327                 int length,        /* length of data in buffer */
1328                 int func)          /* 0 == read, 1 == write */
1329 {
1330
1331         int buflen, datalen;
1332         ctlr_info_t *ci;
1333         int i;
1334         int cntl_num;
1335
1336
1337         ci = (ctlr_info_t *) sh->hostdata[0];
1338         if (ci == NULL)  /* This really shouldn't ever happen. */
1339                 return -EINVAL;
1340
1341         cntl_num = ci->ctlr;    /* Get our index into the hba[] array */
1342
1343         if (func == 0) {        /* User is reading from /proc/scsi/ciss*?/?*  */
1344                 buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n",
1345                                 cntl_num, sh->host_no);
1346
1347                 /* this information is needed by apps to know which cciss
1348                    device corresponds to which scsi host number without
1349                    having to open a scsi target device node.  The device
1350                    information is not a duplicate of /proc/scsi/scsi because
1351                    the two may be out of sync due to scsi hotplug, rather
1352                    this info is for an app to be able to use to know how to
1353                    get them back in sync. */
1354
1355                 for (i=0;i<ccissscsi[cntl_num].ndevices;i++) {
1356                         struct cciss_scsi_dev_t *sd = &ccissscsi[cntl_num].dev[i];
1357                         buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d "
1358                                 "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
1359                                 sh->host_no, sd->bus, sd->target, sd->lun,
1360                                 sd->devtype,
1361                                 sd->scsi3addr[0], sd->scsi3addr[1],
1362                                 sd->scsi3addr[2], sd->scsi3addr[3],
1363                                 sd->scsi3addr[4], sd->scsi3addr[5],
1364                                 sd->scsi3addr[6], sd->scsi3addr[7]);
1365                 }
1366                 datalen = buflen - offset;
1367                 if (datalen < 0) {      /* they're reading past EOF. */
1368                         datalen = 0;
1369                         *start = buffer+buflen;
1370                 } else
1371                         *start = buffer + offset;
1372                 return(datalen);
1373         } else  /* User is writing to /proc/scsi/cciss*?/?*  ... */
1374                 return cciss_scsi_user_command(cntl_num, sh->host_no,
1375                         buffer, length);
1376 }
1377
1378 /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1379    dma mapping  and fills in the scatter gather entries of the
1380    cciss command, cp. */
1381
1382 static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *cp,
1383         struct scsi_cmnd *cmd)
1384 {
1385         unsigned int len;
1386         struct scatterlist *sg;
1387         __u64 addr64;
1388         int request_nsgs, i, chained, sg_index;
1389         struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr;
1390         SGDescriptor_struct *curr_sg;
1391
1392         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1393
1394         chained = 0;
1395         sg_index = 0;
1396         curr_sg = cp->SG;
1397         request_nsgs = scsi_dma_map(cmd);
1398         if (request_nsgs) {
1399                 scsi_for_each_sg(cmd, sg, request_nsgs, i) {
1400                         if (sg_index + 1 == h->max_cmd_sgentries &&
1401                                 !chained && request_nsgs - i > 1) {
1402                                 chained = 1;
1403                                 sg_index = 0;
1404                                 curr_sg = sa->cmd_sg_list[cp->cmdindex];
1405                         }
1406                         addr64 = (__u64) sg_dma_address(sg);
1407                         len  = sg_dma_len(sg);
1408                         curr_sg[sg_index].Addr.lower =
1409                                 (__u32) (addr64 & 0x0FFFFFFFFULL);
1410                         curr_sg[sg_index].Addr.upper =
1411                                 (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1412                         curr_sg[sg_index].Len = len;
1413                         curr_sg[sg_index].Ext = 0;
1414                         ++sg_index;
1415                 }
1416                 if (chained)
1417                         cciss_map_sg_chain_block(h, cp,
1418                                 sa->cmd_sg_list[cp->cmdindex],
1419                                 (request_nsgs - (h->max_cmd_sgentries - 1)) *
1420                                         sizeof(SGDescriptor_struct));
1421         }
1422         /* track how many SG entries we are using */
1423         if (request_nsgs > h->maxSG)
1424                 h->maxSG = request_nsgs;
1425         cp->Header.SGTotal = (__u8) request_nsgs + chained;
1426         if (request_nsgs > h->max_cmd_sgentries)
1427                 cp->Header.SGList = h->max_cmd_sgentries;
1428         else
1429                 cp->Header.SGList = cp->Header.SGTotal;
1430         return;
1431 }
1432
1433
1434 static int
1435 cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
1436 {
1437         ctlr_info_t *c;
1438         int ctlr, rc;
1439         unsigned char scsi3addr[8];
1440         CommandList_struct *cp;
1441         unsigned long flags;
1442
1443         // Get the ptr to our adapter structure (hba[i]) out of cmd->host.
1444         // We violate cmd->host privacy here.  (Is there another way?)
1445         c = (ctlr_info_t *) cmd->device->host->hostdata[0];
1446         ctlr = c->ctlr;
1447
1448         rc = lookup_scsi3addr(ctlr, cmd->device->channel, cmd->device->id,
1449                         cmd->device->lun, scsi3addr);
1450         if (rc != 0) {
1451                 /* the scsi nexus does not match any that we presented... */
1452                 /* pretend to mid layer that we got selection timeout */
1453                 cmd->result = DID_NO_CONNECT << 16;
1454                 done(cmd);
1455                 /* we might want to think about registering controller itself
1456                    as a processor device on the bus so sg binds to it. */
1457                 return 0;
1458         }
1459
1460         /* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n",
1461                 cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/
1462         // printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel,
1463         //      cmd->target, cmd->lun);
1464
1465         /* Ok, we have a reasonable scsi nexus, so send the cmd down, and
1466            see what the device thinks of it. */
1467
1468         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1469         cp = scsi_cmd_alloc(c);
1470         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1471         if (cp == NULL) {                       /* trouble... */
1472                 printk("scsi_cmd_alloc returned NULL!\n");
1473                 /* FIXME: next 3 lines are -> BAD! <- */
1474                 cmd->result = DID_NO_CONNECT << 16;
1475                 done(cmd);
1476                 return 0;
1477         }
1478
1479         // Fill in the command list header
1480
1481         cmd->scsi_done = done;    // save this for use by completion code
1482
1483         // save cp in case we have to abort it
1484         cmd->host_scribble = (unsigned char *) cp;
1485
1486         cp->cmd_type = CMD_SCSI;
1487         cp->scsi_cmd = cmd;
1488         cp->Header.ReplyQueue = 0;  // unused in simple mode
1489         memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1490         cp->Header.Tag.lower = cp->busaddr;  // Use k. address of cmd as tag
1491
1492         // Fill in the request block...
1493
1494         cp->Request.Timeout = 0;
1495         memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB));
1496         BUG_ON(cmd->cmd_len > sizeof(cp->Request.CDB));
1497         cp->Request.CDBLen = cmd->cmd_len;
1498         memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len);
1499         cp->Request.Type.Type = TYPE_CMD;
1500         cp->Request.Type.Attribute = ATTR_SIMPLE;
1501         switch(cmd->sc_data_direction)
1502         {
1503           case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break;
1504           case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break;
1505           case DMA_NONE: cp->Request.Type.Direction = XFER_NONE; break;
1506           case DMA_BIDIRECTIONAL:
1507                 // This can happen if a buggy application does a scsi passthru
1508                 // and sets both inlen and outlen to non-zero. ( see
1509                 // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1510
1511                 cp->Request.Type.Direction = XFER_RSVD;
1512                 // This is technically wrong, and cciss controllers should
1513                 // reject it with CMD_INVALID, which is the most correct
1514                 // response, but non-fibre backends appear to let it
1515                 // slide by, and give the same results as if this field
1516                 // were set correctly.  Either way is acceptable for
1517                 // our purposes here.
1518
1519                 break;
1520
1521           default:
1522                 printk("cciss: unknown data direction: %d\n",
1523                         cmd->sc_data_direction);
1524                 BUG();
1525                 break;
1526         }
1527         cciss_scatter_gather(c, cp, cmd);
1528
1529         /* Put the request on the tail of the request queue */
1530
1531         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1532         addQ(&c->reqQ, cp);
1533         c->Qdepth++;
1534         start_io(c);
1535         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1536
1537         /* the cmd'll come back via intr handler in complete_scsi_command()  */
1538         return 0;
1539 }
1540
1541 static void
1542 cciss_unregister_scsi(int ctlr)
1543 {
1544         struct cciss_scsi_adapter_data_t *sa;
1545         struct cciss_scsi_cmd_stack_t *stk;
1546         unsigned long flags;
1547
1548         /* we are being forcibly unloaded, and may not refuse. */
1549
1550         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1551         sa = hba[ctlr]->scsi_ctlr;
1552         stk = &sa->cmd_stack;
1553
1554         /* if we weren't ever actually registered, don't unregister */
1555         if (sa->registered) {
1556                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1557                 scsi_remove_host(sa->scsi_host);
1558                 scsi_host_put(sa->scsi_host);
1559                 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1560         }
1561
1562         /* set scsi_host to NULL so our detect routine will
1563            find us on register */
1564         sa->scsi_host = NULL;
1565         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1566         scsi_cmd_stack_free(ctlr);
1567         kfree(sa);
1568 }
1569
1570 static int
1571 cciss_engage_scsi(int ctlr)
1572 {
1573         struct cciss_scsi_adapter_data_t *sa;
1574         struct cciss_scsi_cmd_stack_t *stk;
1575         unsigned long flags;
1576
1577         spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1578         sa = hba[ctlr]->scsi_ctlr;
1579         stk = &sa->cmd_stack;
1580
1581         if (sa->registered) {
1582                 printk("cciss%d: SCSI subsystem already engaged.\n", ctlr);
1583                 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1584                 return -ENXIO;
1585         }
1586         sa->registered = 1;
1587         spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1588         cciss_update_non_disk_devices(ctlr, -1);
1589         cciss_scsi_detect(ctlr);
1590         return 0;
1591 }
1592
1593 static void
1594 cciss_seq_tape_report(struct seq_file *seq, int ctlr)
1595 {
1596         unsigned long flags;
1597
1598         CPQ_TAPE_LOCK(ctlr, flags);
1599         seq_printf(seq,
1600                 "Sequential access devices: %d\n\n",
1601                         ccissscsi[ctlr].ndevices);
1602         CPQ_TAPE_UNLOCK(ctlr, flags);
1603 }
1604
1605 static int wait_for_device_to_become_ready(ctlr_info_t *h,
1606         unsigned char lunaddr[])
1607 {
1608         int rc;
1609         int count = 0;
1610         int waittime = HZ;
1611         CommandList_struct *c;
1612
1613         c = cmd_alloc(h, 1);
1614         if (!c) {
1615                 printk(KERN_WARNING "cciss%d: out of memory in "
1616                         "wait_for_device_to_become_ready.\n", h->ctlr);
1617                 return IO_ERROR;
1618         }
1619
1620         /* Send test unit ready until device ready, or give up. */
1621         while (count < 20) {
1622
1623                 /* Wait for a bit.  do this first, because if we send
1624                  * the TUR right away, the reset will just abort it.
1625                  */
1626                 schedule_timeout_uninterruptible(waittime);
1627                 count++;
1628
1629                 /* Increase wait time with each try, up to a point. */
1630                 if (waittime < (HZ * 30))
1631                         waittime = waittime * 2;
1632
1633                 /* Send the Test Unit Ready */
1634                 rc = fill_cmd(c, TEST_UNIT_READY, h->ctlr, NULL, 0, 0,
1635                         lunaddr, TYPE_CMD);
1636                 if (rc == 0)
1637                         rc = sendcmd_withirq_core(h, c, 0);
1638
1639                 (void) process_sendcmd_error(h, c);
1640
1641                 if (rc != 0)
1642                         goto retry_tur;
1643
1644                 if (c->err_info->CommandStatus == CMD_SUCCESS)
1645                         break;
1646
1647                 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1648                         c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1649                         if (c->err_info->SenseInfo[2] == NO_SENSE)
1650                                 break;
1651                         if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) {
1652                                 unsigned char asc;
1653                                 asc = c->err_info->SenseInfo[12];
1654                                 check_for_unit_attention(h, c);
1655                                 if (asc == POWER_OR_RESET)
1656                                         break;
1657                         }
1658                 }
1659 retry_tur:
1660                 printk(KERN_WARNING "cciss%d: Waiting %d secs "
1661                         "for device to become ready.\n",
1662                         h->ctlr, waittime / HZ);
1663                 rc = 1; /* device not ready. */
1664         }
1665
1666         if (rc)
1667                 printk("cciss%d: giving up on device.\n", h->ctlr);
1668         else
1669                 printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr);
1670
1671         cmd_free(h, c, 1);
1672         return rc;
1673 }
1674
1675 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
1676  * complaining.  Doing a host- or bus-reset can't do anything good here.
1677  * Despite what it might say in scsi_error.c, there may well be commands
1678  * on the controller, as the cciss driver registers twice, once as a block
1679  * device for the logical drives, and once as a scsi device, for any tape
1680  * drives.  So we know there are no commands out on the tape drives, but we
1681  * don't know there are no commands on the controller, and it is likely
1682  * that there probably are, as the cciss block device is most commonly used
1683  * as a boot device (embedded controller on HP/Compaq systems.)
1684 */
1685
1686 static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
1687 {
1688         int rc;
1689         CommandList_struct *cmd_in_trouble;
1690         unsigned char lunaddr[8];
1691         ctlr_info_t *c;
1692         int ctlr;
1693
1694         /* find the controller to which the command to be aborted was sent */
1695         c = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1696         if (c == NULL) /* paranoia */
1697                 return FAILED;
1698         ctlr = c->ctlr;
1699         printk(KERN_WARNING "cciss%d: resetting tape drive or medium changer.\n", ctlr);
1700         /* find the command that's giving us trouble */
1701         cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
1702         if (cmd_in_trouble == NULL) /* paranoia */
1703                 return FAILED;
1704         memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8);
1705         /* send a reset to the SCSI LUN which the command was sent to */
1706         rc = sendcmd_withirq(CCISS_RESET_MSG, ctlr, NULL, 0, 0, lunaddr,
1707                 TYPE_MSG);
1708         if (rc == 0 && wait_for_device_to_become_ready(c, lunaddr) == 0)
1709                 return SUCCESS;
1710         printk(KERN_WARNING "cciss%d: resetting device failed.\n", ctlr);
1711         return FAILED;
1712 }
1713
1714 static int  cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
1715 {
1716         int rc;
1717         CommandList_struct *cmd_to_abort;
1718         unsigned char lunaddr[8];
1719         ctlr_info_t *c;
1720         int ctlr;
1721
1722         /* find the controller to which the command to be aborted was sent */
1723         c = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1724         if (c == NULL) /* paranoia */
1725                 return FAILED;
1726         ctlr = c->ctlr;
1727         printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", ctlr);
1728
1729         /* find the command to be aborted */
1730         cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
1731         if (cmd_to_abort == NULL) /* paranoia */
1732                 return FAILED;
1733         memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8);
1734         rc = sendcmd_withirq(CCISS_ABORT_MSG, ctlr, &cmd_to_abort->Header.Tag,
1735                 0, 0, lunaddr, TYPE_MSG);
1736         if (rc == 0)
1737                 return SUCCESS;
1738         return FAILED;
1739
1740 }
1741
1742 #else /* no CONFIG_CISS_SCSI_TAPE */
1743
1744 /* If no tape support, then these become defined out of existence */
1745
1746 #define cciss_scsi_setup(cntl_num)
1747
1748 #endif /* CONFIG_CISS_SCSI_TAPE */