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 <linux/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(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
  52 static CommandList_struct *cmd_alloc(ctlr_info_t *h);
  53 static CommandList_struct *cmd_special_alloc(ctlr_info_t *h);
  54 static void cmd_free(ctlr_info_t *h, CommandList_struct *c);
  55 static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c);
  56
  57 static 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
  65 static int cciss_scsi_queue_command (struct Scsi_Host *h,
  66                                      struct scsi_cmnd *cmd);
  67 static int cciss_eh_device_reset_handler(struct scsi_cmnd *);
  68 static int cciss_eh_abort_handler(struct scsi_cmnd *);
  69
  70 static 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
  81 static 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         .this_id                = 7,
  88         .cmd_per_lun            = 1,
  89         .use_clustering         = DISABLE_CLUSTERING,
  90         /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */
  91         .eh_device_reset_handler= cciss_eh_device_reset_handler,
  92         .eh_abort_handler       = cciss_eh_abort_handler,
  93 };
  94
  95 #pragma pack(1)
  96
  97 #define SCSI_PAD_32 8
  98 #define SCSI_PAD_64 8
  99
 100 struct cciss_scsi_cmd_stack_elem_t {
 101         CommandList_struct cmd;
 102         ErrorInfo_struct Err;
 103         __u32 busaddr;
 104         int cmdindex;
 105         u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64];
 106 };
 107
 108 #pragma pack()
 109
 110 #pragma pack(1)
 111 struct cciss_scsi_cmd_stack_t {
 112         struct cciss_scsi_cmd_stack_elem_t *pool;
 113         struct cciss_scsi_cmd_stack_elem_t **elem;
 114         dma_addr_t cmd_pool_handle;
 115         int top;
 116         int nelems;
 117 };
 118 #pragma pack()
 119
 120 struct cciss_scsi_adapter_data_t {
 121         struct Scsi_Host *scsi_host;
 122         struct cciss_scsi_cmd_stack_t cmd_stack;
 123         SGDescriptor_struct **cmd_sg_list;
 124         int registered;
 125         spinlock_t lock; // to protect ccissscsi[ctlr];
 126 };
 127
 128 #define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \
 129         &h->scsi_ctlr->lock, flags);
 130 #define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \
 131         &h->scsi_ctlr->lock, flags);
 132
 133 static CommandList_struct *
 134 scsi_cmd_alloc(ctlr_info_t *h)
 135 {
 136         /* assume only one process in here at a time, locking done by caller. */
 137         /* use h->lock */
 138         /* might be better to rewrite how we allocate scsi commands in a way that */
 139         /* needs no locking at all. */
 140
 141         /* take the top memory chunk off the stack and return it, if any. */
 142         struct cciss_scsi_cmd_stack_elem_t *c;
 143         struct cciss_scsi_adapter_data_t *sa;
 144         struct cciss_scsi_cmd_stack_t *stk;
 145         u64bit temp64;
 146
 147         sa = h->scsi_ctlr;
 148         stk = &sa->cmd_stack;
 149
 150         if (stk->top < 0)
 151                 return NULL;
 152         c = stk->elem[stk->top];
 153         /* memset(c, 0, sizeof(*c)); */
 154         memset(&c->cmd, 0, sizeof(c->cmd));
 155         memset(&c->Err, 0, sizeof(c->Err));
 156         /* set physical addr of cmd and addr of scsi parameters */
 157         c->cmd.busaddr = c->busaddr;
 158         c->cmd.cmdindex = c->cmdindex;
 159         /* (__u32) (stk->cmd_pool_handle +
 160                 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */
 161
 162         temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct));
 163         /* (__u64) (stk->cmd_pool_handle +
 164                 (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) +
 165                  sizeof(CommandList_struct)); */
 166         stk->top--;
 167         c->cmd.ErrDesc.Addr.lower = temp64.val32.lower;
 168         c->cmd.ErrDesc.Addr.upper = temp64.val32.upper;
 169         c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct);
 170
 171         c->cmd.ctlr = h->ctlr;
 172         c->cmd.err_info = &c->Err;
 173
 174         return (CommandList_struct *) c;
 175 }
 176
 177 static void
 178 scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c)
 179 {
 180         /* assume only one process in here at a time, locking done by caller. */
 181         /* use h->lock */
 182         /* drop the free memory chunk on top of the stack. */
 183
 184         struct cciss_scsi_adapter_data_t *sa;
 185         struct cciss_scsi_cmd_stack_t *stk;
 186
 187         sa = h->scsi_ctlr;
 188         stk = &sa->cmd_stack;
 189         stk->top++;
 190         if (stk->top >= stk->nelems) {
 191                 dev_err(&h->pdev->dev,
 192                         "scsi_cmd_free called too many times.\n");
 193                 BUG();
 194         }
 195         stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c;
 196 }
 197
 198 static int
 199 scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
 200 {
 201         int i;
 202         struct cciss_scsi_cmd_stack_t *stk;
 203         size_t size;
 204
 205         stk = &sa->cmd_stack;
 206         stk->nelems = cciss_tape_cmds + 2;
 207         sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
 208                 h->chainsize, stk->nelems);
 209         if (!sa->cmd_sg_list && h->chainsize > 0)
 210                 return -ENOMEM;
 211
 212         size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
 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(h->pdev, size, &stk->cmd_pool_handle);
 219
 220         if (stk->pool == NULL) {
 221                 cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
 222                 sa->cmd_sg_list = NULL;
 223                 return -ENOMEM;
 224         }
 225         stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL);
 226         if (!stk->elem) {
 227                 pci_free_consistent(h->pdev, size, stk->pool,
 228                 stk->cmd_pool_handle);
 229                 return -1;
 230         }
 231         for (i = 0; i < stk->nelems; i++) {
 232                 stk->elem[i] = &stk->pool[i];
 233                 stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle +
 234                         (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i));
 235                 stk->elem[i]->cmdindex = i;
 236         }
 237         stk->top = stk->nelems-1;
 238         return 0;
 239 }
 240
 241 static void
 242 scsi_cmd_stack_free(ctlr_info_t *h)
 243 {
 244         struct cciss_scsi_adapter_data_t *sa;
 245         struct cciss_scsi_cmd_stack_t *stk;
 246         size_t size;
 247
 248         sa = h->scsi_ctlr;
 249         stk = &sa->cmd_stack;
 250         if (stk->top != stk->nelems-1) {
 251                 dev_warn(&h->pdev->dev,
 252                         "bug: %d scsi commands are still outstanding.\n",
 253                         stk->nelems - stk->top);
 254         }
 255         size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
 256
 257         pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle);
 258         stk->pool = NULL;
 259         cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
 260         kfree(stk->elem);
 261         stk->elem = NULL;
 262 }
 263
 264 #if 0
 265 static int xmargin=8;
 266 static int amargin=60;
 267
 268 static void
 269 print_bytes (unsigned char *c, int len, int hex, int ascii)
 270 {
 271
 272         int i;
 273         unsigned char *x;
 274
 275         if (hex)
 276         {
 277                 x = c;
 278                 for (i=0;i<len;i++)
 279                 {
 280                         if ((i % xmargin) == 0 && i>0) printk("\n");
 281                         if ((i % xmargin) == 0) printk("0x%04x:", i);
 282                         printk(" %02x", *x);
 283                         x++;
 284                 }
 285                 printk("\n");
 286         }
 287         if (ascii)
 288         {
 289                 x = c;
 290                 for (i=0;i<len;i++)
 291                 {
 292                         if ((i % amargin) == 0 && i>0) printk("\n");
 293                         if ((i % amargin) == 0) printk("0x%04x:", i);
 294                         if (*x > 26 && *x < 128) printk("%c", *x);
 295                         else printk(".");
 296                         x++;
 297                 }
 298                 printk("\n");
 299         }
 300 }
 301
 302 static void
 303 print_cmd(CommandList_struct *cp)
 304 {
 305         printk("queue:%d\n", cp->Header.ReplyQueue);
 306         printk("sglist:%d\n", cp->Header.SGList);
 307         printk("sgtot:%d\n", cp->Header.SGTotal);
 308         printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper,
 309                         cp->Header.Tag.lower);
 310         printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 311                 cp->Header.LUN.LunAddrBytes[0],
 312                 cp->Header.LUN.LunAddrBytes[1],
 313                 cp->Header.LUN.LunAddrBytes[2],
 314                 cp->Header.LUN.LunAddrBytes[3],
 315                 cp->Header.LUN.LunAddrBytes[4],
 316                 cp->Header.LUN.LunAddrBytes[5],
 317                 cp->Header.LUN.LunAddrBytes[6],
 318                 cp->Header.LUN.LunAddrBytes[7]);
 319         printk("CDBLen:%d\n", cp->Request.CDBLen);
 320         printk("Type:%d\n",cp->Request.Type.Type);
 321         printk("Attr:%d\n",cp->Request.Type.Attribute);
 322         printk(" Dir:%d\n",cp->Request.Type.Direction);
 323         printk("Timeout:%d\n",cp->Request.Timeout);
 324         printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x"
 325                 " %02x %02x %02x %02x %02x %02x %02x %02x\n",
 326                 cp->Request.CDB[0], cp->Request.CDB[1],
 327                 cp->Request.CDB[2], cp->Request.CDB[3],
 328                 cp->Request.CDB[4], cp->Request.CDB[5],
 329                 cp->Request.CDB[6], cp->Request.CDB[7],
 330                 cp->Request.CDB[8], cp->Request.CDB[9],
 331                 cp->Request.CDB[10], cp->Request.CDB[11],
 332                 cp->Request.CDB[12], cp->Request.CDB[13],
 333                 cp->Request.CDB[14], cp->Request.CDB[15]),
 334         printk("edesc.Addr: 0x%08x/0%08x, Len  = %d\n",
 335                 cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower,
 336                         cp->ErrDesc.Len);
 337         printk("sgs..........Errorinfo:\n");
 338         printk("scsistatus:%d\n", cp->err_info->ScsiStatus);
 339         printk("senselen:%d\n", cp->err_info->SenseLen);
 340         printk("cmd status:%d\n", cp->err_info->CommandStatus);
 341         printk("resid cnt:%d\n", cp->err_info->ResidualCnt);
 342         printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size);
 343         printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num);
 344         printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
 345
 346 }
 347
 348 #endif
 349
 350 static int
 351 find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun)
 352 {
 353         /* finds an unused bus, target, lun for a new device */
 354         /* assumes h->scsi_ctlr->lock is held */
 355         int i, found=0;
 356         unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA];
 357
 358         memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA);
 359
 360         target_taken[SELF_SCSI_ID] = 1;
 361         for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++)
 362                 target_taken[ccissscsi[h->ctlr].dev[i].target] = 1;
 363
 364         for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) {
 365                 if (!target_taken[i]) {
 366                         *bus = 0; *target=i; *lun = 0; found=1;
 367                         break;
 368                 }
 369         }
 370         return (!found);
 371 }
 372 struct scsi2map {
 373         char scsi3addr[8];
 374         int bus, target, lun;
 375 };
 376
 377 static int
 378 cciss_scsi_add_entry(ctlr_info_t *h, int hostno,
 379                 struct cciss_scsi_dev_t *device,
 380                 struct scsi2map *added, int *nadded)
 381 {
 382         /* assumes h->scsi_ctlr->lock is held */
 383         int n = ccissscsi[h->ctlr].ndevices;
 384         struct cciss_scsi_dev_t *sd;
 385         int i, bus, target, lun;
 386         unsigned char addr1[8], addr2[8];
 387
 388         if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
 389                 dev_warn(&h->pdev->dev, "Too many devices, "
 390                         "some will be inaccessible.\n");
 391                 return -1;
 392         }
 393
 394         bus = target = -1;
 395         lun = 0;
 396         /* Is this device a non-zero lun of a multi-lun device */
 397         /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */
 398         if (device->scsi3addr[4] != 0) {
 399                 /* Search through our list and find the device which */
 400                 /* has the same 8 byte LUN address, excepting byte 4. */
 401                 /* Assign the same bus and target for this new LUN. */
 402                 /* Use the logical unit number from the firmware. */
 403                 memcpy(addr1, device->scsi3addr, 8);
 404                 addr1[4] = 0;
 405                 for (i = 0; i < n; i++) {
 406                         sd = &ccissscsi[h->ctlr].dev[i];
 407                         memcpy(addr2, sd->scsi3addr, 8);
 408                         addr2[4] = 0;
 409                         /* differ only in byte 4? */
 410                         if (memcmp(addr1, addr2, 8) == 0) {
 411                                 bus = sd->bus;
 412                                 target = sd->target;
 413                                 lun = device->scsi3addr[4];
 414                                 break;
 415                         }
 416                 }
 417         }
 418
 419         sd = &ccissscsi[h->ctlr].dev[n];
 420         if (lun == 0) {
 421                 if (find_bus_target_lun(h,
 422                         &sd->bus, &sd->target, &sd->lun) != 0)
 423                         return -1;
 424         } else {
 425                 sd->bus = bus;
 426                 sd->target = target;
 427                 sd->lun = lun;
 428         }
 429         added[*nadded].bus = sd->bus;
 430         added[*nadded].target = sd->target;
 431         added[*nadded].lun = sd->lun;
 432         (*nadded)++;
 433
 434         memcpy(sd->scsi3addr, device->scsi3addr, 8);
 435         memcpy(sd->vendor, device->vendor, sizeof(sd->vendor));
 436         memcpy(sd->revision, device->revision, sizeof(sd->revision));
 437         memcpy(sd->device_id, device->device_id, sizeof(sd->device_id));
 438         sd->devtype = device->devtype;
 439
 440         ccissscsi[h->ctlr].ndevices++;
 441
 442         /* initially, (before registering with scsi layer) we don't
 443            know our hostno and we don't want to print anything first
 444            time anyway (the scsi layer's inquiries will show that info) */
 445         if (hostno != -1)
 446                 dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
 447                         scsi_device_type(sd->devtype), hostno,
 448                         sd->bus, sd->target, sd->lun);
 449         return 0;
 450 }
 451
 452 static void
 453 cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry,
 454         struct scsi2map *removed, int *nremoved)
 455 {
 456         /* assumes h->ctlr]->scsi_ctlr->lock is held */
 457         int i;
 458         struct cciss_scsi_dev_t sd;
 459
 460         if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return;
 461         sd = ccissscsi[h->ctlr].dev[entry];
 462         removed[*nremoved].bus    = sd.bus;
 463         removed[*nremoved].target = sd.target;
 464         removed[*nremoved].lun    = sd.lun;
 465         (*nremoved)++;
 466         for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++)
 467                 ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1];
 468         ccissscsi[h->ctlr].ndevices--;
 469         dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
 470                 scsi_device_type(sd.devtype), hostno,
 471                         sd.bus, sd.target, sd.lun);
 472 }
 473
 474
 475 #define SCSI3ADDR_EQ(a,b) ( \
 476         (a)[7] == (b)[7] && \
 477         (a)[6] == (b)[6] && \
 478         (a)[5] == (b)[5] && \
 479         (a)[4] == (b)[4] && \
 480         (a)[3] == (b)[3] && \
 481         (a)[2] == (b)[2] && \
 482         (a)[1] == (b)[1] && \
 483         (a)[0] == (b)[0])
 484
 485 static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr)
 486 {
 487         /* called when scsi_add_device fails in order to re-adjust */
 488         /* ccissscsi[] to match the mid layer's view. */
 489         unsigned long flags;
 490         int i, j;
 491         CPQ_TAPE_LOCK(h, flags);
 492         for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
 493                 if (memcmp(scsi3addr,
 494                                 ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) {
 495                         for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++)
 496                                 ccissscsi[h->ctlr].dev[j] =
 497                                         ccissscsi[h->ctlr].dev[j+1];
 498                         ccissscsi[h->ctlr].ndevices--;
 499                         break;
 500                 }
 501         }
 502         CPQ_TAPE_UNLOCK(h, flags);
 503 }
 504
 505 static int device_is_the_same(struct cciss_scsi_dev_t *dev1,
 506         struct cciss_scsi_dev_t *dev2)
 507 {
 508         return dev1->devtype == dev2->devtype &&
 509                 memcmp(dev1->scsi3addr, dev2->scsi3addr,
 510                         sizeof(dev1->scsi3addr)) == 0 &&
 511                 memcmp(dev1->device_id, dev2->device_id,
 512                         sizeof(dev1->device_id)) == 0 &&
 513                 memcmp(dev1->vendor, dev2->vendor,
 514                         sizeof(dev1->vendor)) == 0 &&
 515                 memcmp(dev1->model, dev2->model,
 516                         sizeof(dev1->model)) == 0 &&
 517                 memcmp(dev1->revision, dev2->revision,
 518                         sizeof(dev1->revision)) == 0;
 519 }
 520
 521 static int
 522 adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
 523         struct cciss_scsi_dev_t sd[], int nsds)
 524 {
 525         /* sd contains scsi3 addresses and devtypes, but
 526            bus target and lun are not filled in.  This funciton
 527            takes what's in sd to be the current and adjusts
 528            ccissscsi[] to be in line with what's in sd. */
 529
 530         int i,j, found, changes=0;
 531         struct cciss_scsi_dev_t *csd;
 532         unsigned long flags;
 533         struct scsi2map *added, *removed;
 534         int nadded, nremoved;
 535         struct Scsi_Host *sh = NULL;
 536
 537         added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA,
 538                         GFP_KERNEL);
 539         removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA,
 540                         GFP_KERNEL);
 541
 542         if (!added || !removed) {
 543                 dev_warn(&h->pdev->dev,
 544                         "Out of memory in adjust_cciss_scsi_table\n");
 545                 goto free_and_out;
 546         }
 547
 548         CPQ_TAPE_LOCK(h, flags);
 549
 550         if (hostno != -1)  /* if it's not the first time... */
 551                 sh = h->scsi_ctlr->scsi_host;
 552
 553         /* find any devices in ccissscsi[] that are not in
 554            sd[] and remove them from ccissscsi[] */
 555
 556         i = 0;
 557         nremoved = 0;
 558         nadded = 0;
 559         while (i < ccissscsi[h->ctlr].ndevices) {
 560                 csd = &ccissscsi[h->ctlr].dev[i];
 561                 found=0;
 562                 for (j=0;j<nsds;j++) {
 563                         if (SCSI3ADDR_EQ(sd[j].scsi3addr,
 564                                 csd->scsi3addr)) {
 565                                 if (device_is_the_same(&sd[j], csd))
 566                                         found=2;
 567                                 else
 568                                         found=1;
 569                                 break;
 570                         }
 571                 }
 572
 573                 if (found == 0) { /* device no longer present. */
 574                         changes++;
 575                         cciss_scsi_remove_entry(h, hostno, i,
 576                                 removed, &nremoved);
 577                         /* remove ^^^, hence i not incremented */
 578                 } else if (found == 1) { /* device is different in some way */
 579                         changes++;
 580                         dev_info(&h->pdev->dev,
 581                                 "device c%db%dt%dl%d has changed.\n",
 582                                 hostno, csd->bus, csd->target, csd->lun);
 583                         cciss_scsi_remove_entry(h, hostno, i,
 584                                 removed, &nremoved);
 585                         /* remove ^^^, hence i not incremented */
 586                         if (cciss_scsi_add_entry(h, hostno, &sd[j],
 587                                 added, &nadded) != 0)
 588                                 /* we just removed one, so add can't fail. */
 589                                         BUG();
 590                         csd->devtype = sd[j].devtype;
 591                         memcpy(csd->device_id, sd[j].device_id,
 592                                 sizeof(csd->device_id));
 593                         memcpy(csd->vendor, sd[j].vendor,
 594                                 sizeof(csd->vendor));
 595                         memcpy(csd->model, sd[j].model,
 596                                 sizeof(csd->model));
 597                         memcpy(csd->revision, sd[j].revision,
 598                                 sizeof(csd->revision));
 599                 } else          /* device is same as it ever was, */
 600                         i++;    /* so just move along. */
 601         }
 602
 603         /* Now, make sure every device listed in sd[] is also
 604            listed in ccissscsi[], adding them if they aren't found */
 605
 606         for (i=0;i<nsds;i++) {
 607                 found=0;
 608                 for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) {
 609                         csd = &ccissscsi[h->ctlr].dev[j];
 610                         if (SCSI3ADDR_EQ(sd[i].scsi3addr,
 611                                 csd->scsi3addr)) {
 612                                 if (device_is_the_same(&sd[i], csd))
 613                                         found=2;        /* found device */
 614                                 else
 615                                         found=1;        /* found a bug. */
 616                                 break;
 617                         }
 618                 }
 619                 if (!found) {
 620                         changes++;
 621                         if (cciss_scsi_add_entry(h, hostno, &sd[i],
 622                                 added, &nadded) != 0)
 623                                 break;
 624                 } else if (found == 1) {
 625                         /* should never happen... */
 626                         changes++;
 627                         dev_warn(&h->pdev->dev,
 628                                 "device unexpectedly changed\n");
 629                         /* but if it does happen, we just ignore that device */
 630                 }
 631         }
 632         CPQ_TAPE_UNLOCK(h, flags);
 633
 634         /* Don't notify scsi mid layer of any changes the first time through */
 635         /* (or if there are no changes) scsi_scan_host will do it later the */
 636         /* first time through. */
 637         if (hostno == -1 || !changes)
 638                 goto free_and_out;
 639
 640         /* Notify scsi mid layer of any removed devices */
 641         for (i = 0; i < nremoved; i++) {
 642                 struct scsi_device *sdev =
 643                         scsi_device_lookup(sh, removed[i].bus,
 644                                 removed[i].target, removed[i].lun);
 645                 if (sdev != NULL) {
 646                         scsi_remove_device(sdev);
 647                         scsi_device_put(sdev);
 648                 } else {
 649                         /* We don't expect to get here. */
 650                         /* future cmds to this device will get selection */
 651                         /* timeout as if the device was gone. */
 652                         dev_warn(&h->pdev->dev, "didn't find "
 653                                 "c%db%dt%dl%d\n for removal.",
 654                                 hostno, removed[i].bus,
 655                                 removed[i].target, removed[i].lun);
 656                 }
 657         }
 658
 659         /* Notify scsi mid layer of any added devices */
 660         for (i = 0; i < nadded; i++) {
 661                 int rc;
 662                 rc = scsi_add_device(sh, added[i].bus,
 663                         added[i].target, added[i].lun);
 664                 if (rc == 0)
 665                         continue;
 666                 dev_warn(&h->pdev->dev, "scsi_add_device "
 667                         "c%db%dt%dl%d failed, device not added.\n",
 668                         hostno, 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
 674 free_and_out:
 675         kfree(added);
 676         kfree(removed);
 677         return 0;
 678 }
 679
 680 static int
 681 lookup_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
 702 static void
 703 cciss_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
 723 static 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         /* Ordinarily, this case should never happen, but there is a bug
 769            in some released firmware revisions that allows it to happen
 770            if, for example, a 4100 backplane loses power and the tape
 771            drive is in it.  We assume that it's a fatal error of some
 772            kind because we can't show that it wasn't. We will make it
 773            look like selection timeout since that is the most common
 774            reason for this to occur, and it's severe enough. */
 775
 776                                         cmd->result = DID_NO_CONNECT << 16;
 777                                 }
 778                         break;
 779                         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
 780                         break;
 781                         case CMD_DATA_OVERRUN:
 782                                 dev_warn(&h->pdev->dev, "%p has"
 783                                         " completed with data overrun "
 784                                         "reported\n", c);
 785                         break;
 786                         case CMD_INVALID: {
 787                                 /* print_bytes(c, sizeof(*c), 1, 0);
 788                                 print_cmd(c); */
 789      /* We get CMD_INVALID if you address a non-existent tape drive instead
 790         of a selection timeout (no response).  You will see this if you yank
 791         out a tape drive, then try to access it. This is kind of a shame
 792         because it means that any other CMD_INVALID (e.g. driver bug) will
 793         get interpreted as a missing target. */
 794                                 cmd->result = DID_NO_CONNECT << 16;
 795                                 }
 796                         break;
 797                         case CMD_PROTOCOL_ERR:
 798                                 cmd->result = DID_ERROR << 16;
 799                                 dev_warn(&h->pdev->dev,
 800                                         "%p has protocol error\n", c);
 801                         break;
 802                         case CMD_HARDWARE_ERR:
 803                                 cmd->result = DID_ERROR << 16;
 804                                 dev_warn(&h->pdev->dev,
 805                                         "%p had hardware error\n", c);
 806                         break;
 807                         case CMD_CONNECTION_LOST:
 808                                 cmd->result = DID_ERROR << 16;
 809                                 dev_warn(&h->pdev->dev,
 810                                         "%p had connection lost\n", c);
 811                         break;
 812                         case CMD_ABORTED:
 813                                 cmd->result = DID_ABORT << 16;
 814                                 dev_warn(&h->pdev->dev, "%p was aborted\n", c);
 815                         break;
 816                         case CMD_ABORT_FAILED:
 817                                 cmd->result = DID_ERROR << 16;
 818                                 dev_warn(&h->pdev->dev,
 819                                         "%p reports abort failed\n", c);
 820                         break;
 821                         case CMD_UNSOLICITED_ABORT:
 822                                 cmd->result = DID_ABORT << 16;
 823                                 dev_warn(&h->pdev->dev, "%p aborted due to an "
 824                                         "unsolicited abort\n", c);
 825                         break;
 826                         case CMD_TIMEOUT:
 827                                 cmd->result = DID_TIME_OUT << 16;
 828                                 dev_warn(&h->pdev->dev, "%p timedout\n", c);
 829                         break;
 830                         case CMD_UNABORTABLE:
 831                                 cmd->result = DID_ERROR << 16;
 832                                 dev_warn(&h->pdev->dev, "c %p command "
 833                                         "unabortable\n", c);
 834                         break;
 835                         default:
 836                                 cmd->result = DID_ERROR << 16;
 837                                 dev_warn(&h->pdev->dev,
 838                                         "%p returned unknown status %x\n", c,
 839                                                 ei->CommandStatus);
 840                 }
 841         }
 842         cmd->scsi_done(cmd);
 843         scsi_cmd_free(h, c);
 844 }
 845
 846 static int
 847 cciss_scsi_detect(ctlr_info_t *h)
 848 {
 849         struct Scsi_Host *sh;
 850         int error;
 851
 852         sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *));
 853         if (sh == NULL)
 854                 goto fail;
 855         sh->io_port = 0;        // good enough?  FIXME,
 856         sh->n_io_port = 0;      // I don't think we use these two...
 857         sh->this_id = SELF_SCSI_ID;
 858         sh->can_queue = cciss_tape_cmds;
 859         sh->sg_tablesize = h->maxsgentries;
 860         sh->max_cmd_len = MAX_COMMAND_SIZE;
 861         sh->max_sectors = h->cciss_max_sectors;
 862
 863         ((struct cciss_scsi_adapter_data_t *)
 864                 h->scsi_ctlr)->scsi_host = sh;
 865         sh->hostdata[0] = (unsigned long) h;
 866         sh->irq = h->intr[SIMPLE_MODE_INT];
 867         sh->unique_id = sh->irq;
 868         error = scsi_add_host(sh, &h->pdev->dev);
 869         if (error)
 870                 goto fail_host_put;
 871         scsi_scan_host(sh);
 872         return 1;
 873
 874  fail_host_put:
 875         scsi_host_put(sh);
 876  fail:
 877         return 0;
 878 }
 879
 880 static void
 881 cciss_unmap_one(struct pci_dev *pdev,
 882                 CommandList_struct *c,
 883                 size_t buflen,
 884                 int data_direction)
 885 {
 886         u64bit addr64;
 887
 888         addr64.val32.lower = c->SG[0].Addr.lower;
 889         addr64.val32.upper = c->SG[0].Addr.upper;
 890         pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction);
 891 }
 892
 893 static void
 894 cciss_map_one(struct pci_dev *pdev,
 895                 CommandList_struct *c,
 896                 unsigned char *buf,
 897                 size_t buflen,
 898                 int data_direction)
 899 {
 900         __u64 addr64;
 901
 902         addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction);
 903         c->SG[0].Addr.lower =
 904           (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
 905         c->SG[0].Addr.upper =
 906           (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
 907         c->SG[0].Len = buflen;
 908         c->Header.SGList = (__u8) 1;   /* no. SGs contig in this cmd */
 909         c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
 910 }
 911
 912 static int
 913 cciss_scsi_do_simple_cmd(ctlr_info_t *h,
 914                         CommandList_struct *c,
 915                         unsigned char *scsi3addr,
 916                         unsigned char *cdb,
 917                         unsigned char cdblen,
 918                         unsigned char *buf, int bufsize,
 919                         int direction)
 920 {
 921         DECLARE_COMPLETION_ONSTACK(wait);
 922
 923         c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */
 924         c->scsi_cmd = NULL;
 925         c->Header.ReplyQueue = 0;  /* unused in simple mode */
 926         memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN));
 927         c->Header.Tag.lower = c->busaddr;  /* Use k. address of cmd as tag */
 928         // Fill in the request block...
 929
 930         /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n",
 931                 scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
 932                 scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */
 933
 934         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
 935         memcpy(c->Request.CDB, cdb, cdblen);
 936         c->Request.Timeout = 0;
 937         c->Request.CDBLen = cdblen;
 938         c->Request.Type.Type = TYPE_CMD;
 939         c->Request.Type.Attribute = ATTR_SIMPLE;
 940         c->Request.Type.Direction = direction;
 941
 942         /* Fill in the SG list and do dma mapping */
 943         cciss_map_one(h->pdev, c, (unsigned char *) buf,
 944                         bufsize, DMA_FROM_DEVICE);
 945
 946         c->waiting = &wait;
 947         enqueue_cmd_and_start_io(h, c);
 948         wait_for_completion(&wait);
 949
 950         /* undo the dma mapping */
 951         cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE);
 952         return(0);
 953 }
 954
 955 static void
 956 cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c)
 957 {
 958         ErrorInfo_struct *ei;
 959
 960         ei = c->err_info;
 961         switch(ei->CommandStatus)
 962         {
 963                 case CMD_TARGET_STATUS:
 964                         dev_warn(&h->pdev->dev,
 965                                 "cmd %p has completed with errors\n", c);
 966                         dev_warn(&h->pdev->dev,
 967                                 "cmd %p has SCSI Status = %x\n",
 968                                 c, ei->ScsiStatus);
 969                         if (ei->ScsiStatus == 0)
 970                                 dev_warn(&h->pdev->dev,
 971                                 "SCSI status is abnormally zero.  "
 972                                 "(probably indicates selection timeout "
 973                                 "reported incorrectly due to a known "
 974                                 "firmware bug, circa July, 2001.)\n");
 975                 break;
 976                 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
 977                         dev_info(&h->pdev->dev, "UNDERRUN\n");
 978                 break;
 979                 case CMD_DATA_OVERRUN:
 980                         dev_warn(&h->pdev->dev, "%p has"
 981                                 " completed with data overrun "
 982                                 "reported\n", c);
 983                 break;
 984                 case CMD_INVALID: {
 985                         /* controller unfortunately reports SCSI passthru's */
 986                         /* to non-existent targets as invalid commands. */
 987                         dev_warn(&h->pdev->dev,
 988                                 "%p is reported invalid (probably means "
 989                                 "target device no longer present)\n", c);
 990                         /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0);
 991                         print_cmd(c);  */
 992                         }
 993                 break;
 994                 case CMD_PROTOCOL_ERR:
 995                         dev_warn(&h->pdev->dev, "%p has protocol error\n", c);
 996                 break;
 997                 case CMD_HARDWARE_ERR:
 998                         /* cmd->result = DID_ERROR << 16; */
 999                         dev_warn(&h->pdev->dev, "%p had hardware error\n", c);
1000                 break;
1001                 case CMD_CONNECTION_LOST:
1002                         dev_warn(&h->pdev->dev, "%p had connection lost\n", c);
1003                 break;
1004                 case CMD_ABORTED:
1005                         dev_warn(&h->pdev->dev, "%p was aborted\n", c);
1006                 break;
1007                 case CMD_ABORT_FAILED:
1008                         dev_warn(&h->pdev->dev,
1009                                 "%p reports abort failed\n", c);
1010                 break;
1011                 case CMD_UNSOLICITED_ABORT:
1012                         dev_warn(&h->pdev->dev,
1013                                 "%p aborted due to an unsolicited abort\n", c);
1014                 break;
1015                 case CMD_TIMEOUT:
1016                         dev_warn(&h->pdev->dev, "%p timedout\n", c);
1017                 break;
1018                 case CMD_UNABORTABLE:
1019                         dev_warn(&h->pdev->dev,
1020                                 "%p unabortable\n", c);
1021                 break;
1022                 default:
1023                         dev_warn(&h->pdev->dev,
1024                                 "%p returned unknown status %x\n",
1025                                 c, ei->CommandStatus);
1026         }
1027 }
1028
1029 static int
1030 cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr,
1031         unsigned char page, unsigned char *buf,
1032         unsigned char bufsize)
1033 {
1034         int rc;
1035         CommandList_struct *c;
1036         char cdb[6];
1037         ErrorInfo_struct *ei;
1038         unsigned long flags;
1039
1040         spin_lock_irqsave(&h->lock, flags);
1041         c = scsi_cmd_alloc(h);
1042         spin_unlock_irqrestore(&h->lock, flags);
1043
1044         if (c == NULL) {                        /* trouble... */
1045                 printk("cmd_alloc returned NULL!\n");
1046                 return -1;
1047         }
1048
1049         ei = c->err_info;
1050
1051         cdb[0] = CISS_INQUIRY;
1052         cdb[1] = (page != 0);
1053         cdb[2] = page;
1054         cdb[3] = 0;
1055         cdb[4] = bufsize;
1056         cdb[5] = 0;
1057         rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb,
1058                                 6, buf, bufsize, XFER_READ);
1059
1060         if (rc != 0) return rc; /* something went wrong */
1061
1062         if (ei->CommandStatus != 0 &&
1063             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1064                 cciss_scsi_interpret_error(h, c);
1065                 rc = -1;
1066         }
1067         spin_lock_irqsave(&h->lock, flags);
1068         scsi_cmd_free(h, c);
1069         spin_unlock_irqrestore(&h->lock, flags);
1070         return rc;
1071 }
1072
1073 /* Get the device id from inquiry page 0x83 */
1074 static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr,
1075         unsigned char *device_id, int buflen)
1076 {
1077         int rc;
1078         unsigned char *buf;
1079
1080         if (buflen > 16)
1081                 buflen = 16;
1082         buf = kzalloc(64, GFP_KERNEL);
1083         if (!buf)
1084                 return -1;
1085         rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1086         if (rc == 0)
1087                 memcpy(device_id, &buf[8], buflen);
1088         kfree(buf);
1089         return rc != 0;
1090 }
1091
1092 static int
1093 cciss_scsi_do_report_phys_luns(ctlr_info_t *h,
1094                 ReportLunData_struct *buf, int bufsize)
1095 {
1096         int rc;
1097         CommandList_struct *c;
1098         unsigned char cdb[12];
1099         unsigned char scsi3addr[8];
1100         ErrorInfo_struct *ei;
1101         unsigned long flags;
1102
1103         spin_lock_irqsave(&h->lock, flags);
1104         c = scsi_cmd_alloc(h);
1105         spin_unlock_irqrestore(&h->lock, flags);
1106         if (c == NULL) {                        /* trouble... */
1107                 printk("cmd_alloc returned NULL!\n");
1108                 return -1;
1109         }
1110
1111         memset(&scsi3addr[0], 0, 8); /* address the controller */
1112         cdb[0] = CISS_REPORT_PHYS;
1113         cdb[1] = 0;
1114         cdb[2] = 0;
1115         cdb[3] = 0;
1116         cdb[4] = 0;
1117         cdb[5] = 0;
1118         cdb[6] = (bufsize >> 24) & 0xFF;  //MSB
1119         cdb[7] = (bufsize >> 16) & 0xFF;
1120         cdb[8] = (bufsize >> 8) & 0xFF;
1121         cdb[9] = bufsize & 0xFF;
1122         cdb[10] = 0;
1123         cdb[11] = 0;
1124
1125         rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr,
1126                                 cdb, 12,
1127                                 (unsigned char *) buf,
1128                                 bufsize, XFER_READ);
1129
1130         if (rc != 0) return rc; /* something went wrong */
1131
1132         ei = c->err_info;
1133         if (ei->CommandStatus != 0 &&
1134             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1135                 cciss_scsi_interpret_error(h, c);
1136                 rc = -1;
1137         }
1138         spin_lock_irqsave(&h->lock, flags);
1139         scsi_cmd_free(h, c);
1140         spin_unlock_irqrestore(&h->lock, flags);
1141         return rc;
1142 }
1143
1144 static void
1145 cciss_update_non_disk_devices(ctlr_info_t *h, int hostno)
1146 {
1147         /* the idea here is we could get notified from /proc
1148            that some devices have changed, so we do a report
1149            physical luns cmd, and adjust our list of devices
1150            accordingly.  (We can't rely on the scsi-mid layer just
1151            doing inquiries, because the "busses" that the scsi
1152            mid-layer probes are totally fabricated by this driver,
1153            so new devices wouldn't show up.
1154
1155            the scsi3addr's of devices won't change so long as the
1156            adapter is not reset.  That means we can rescan and
1157            tell which devices we already know about, vs. new
1158            devices, vs.  disappearing devices.
1159
1160            Also, if you yank out a tape drive, then put in a disk
1161            in it's place, (say, a configured volume from another
1162            array controller for instance)  _don't_ poke this driver
1163            (so it thinks it's still a tape, but _do_ poke the scsi
1164            mid layer, so it does an inquiry... the scsi mid layer
1165            will see the physical disk.  This would be bad.  Need to
1166            think about how to prevent that.  One idea would be to
1167            snoop all scsi responses and if an inquiry repsonse comes
1168            back that reports a disk, chuck it an return selection
1169            timeout instead and adjust our table...  Not sure i like
1170            that though.
1171
1172          */
1173 #define OBDR_TAPE_INQ_SIZE 49
1174 #define OBDR_TAPE_SIG "$DR-10"
1175         ReportLunData_struct *ld_buff;
1176         unsigned char *inq_buff;
1177         unsigned char scsi3addr[8];
1178         __u32 num_luns=0;
1179         unsigned char *ch;
1180         struct cciss_scsi_dev_t *currentsd, *this_device;
1181         int ncurrent=0;
1182         int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
1183         int i;
1184
1185         ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
1186         inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1187         currentsd = kzalloc(sizeof(*currentsd) *
1188                         (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL);
1189         if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) {
1190                 printk(KERN_ERR "cciss: out of memory\n");
1191                 goto out;
1192         }
1193         this_device = &currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
1194         if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) {
1195                 ch = &ld_buff->LUNListLength[0];
1196                 num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8;
1197                 if (num_luns > CISS_MAX_PHYS_LUN) {
1198                         printk(KERN_WARNING
1199                                 "cciss: Maximum physical LUNs (%d) exceeded.  "
1200                                 "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN,
1201                                 num_luns - CISS_MAX_PHYS_LUN);
1202                         num_luns = CISS_MAX_PHYS_LUN;
1203                 }
1204         }
1205         else {
1206                 printk(KERN_ERR  "cciss: Report physical LUNs failed.\n");
1207                 goto out;
1208         }
1209
1210
1211         /* adjust our table of devices */
1212         for (i = 0; i < num_luns; i++) {
1213                 /* for each physical lun, do an inquiry */
1214                 if (ld_buff->LUN[i][3] & 0xC0) continue;
1215                 memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
1216                 memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8);
1217
1218                 if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1219                         (unsigned char) OBDR_TAPE_INQ_SIZE) != 0)
1220                         /* Inquiry failed (msg printed already) */
1221                         continue; /* so we will skip this device. */
1222
1223                 this_device->devtype = (inq_buff[0] & 0x1f);
1224                 this_device->bus = -1;
1225                 this_device->target = -1;
1226                 this_device->lun = -1;
1227                 memcpy(this_device->scsi3addr, scsi3addr, 8);
1228                 memcpy(this_device->vendor, &inq_buff[8],
1229                         sizeof(this_device->vendor));
1230                 memcpy(this_device->model, &inq_buff[16],
1231                         sizeof(this_device->model));
1232                 memcpy(this_device->revision, &inq_buff[32],
1233                         sizeof(this_device->revision));
1234                 memset(this_device->device_id, 0,
1235                         sizeof(this_device->device_id));
1236                 cciss_scsi_get_device_id(h, scsi3addr,
1237                         this_device->device_id, sizeof(this_device->device_id));
1238
1239                 switch (this_device->devtype)
1240                 {
1241                   case 0x05: /* CD-ROM */ {
1242
1243                         /* We don't *really* support actual CD-ROM devices,
1244                          * just this "One Button Disaster Recovery" tape drive
1245                          * which temporarily pretends to be a CD-ROM drive.
1246                          * So we check that the device is really an OBDR tape
1247                          * device by checking for "$DR-10" in bytes 43-48 of
1248                          * the inquiry data.
1249                          */
1250                                 char obdr_sig[7];
1251
1252                                 strncpy(obdr_sig, &inq_buff[43], 6);
1253                                 obdr_sig[6] = '\0';
1254                                 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1255                                         /* Not OBDR device, ignore it. */
1256                                         break;
1257                         }
1258                         /* fall through . . . */
1259                   case 0x01: /* sequential access, (tape) */
1260                   case 0x08: /* medium changer */
1261                         if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
1262                                 printk(KERN_INFO "cciss%d: %s ignored, "
1263                                         "too many devices.\n", h->ctlr,
1264                                         scsi_device_type(this_device->devtype));
1265                                 break;
1266                         }
1267                         currentsd[ncurrent] = *this_device;
1268                         ncurrent++;
1269                         break;
1270                   default:
1271                         break;
1272                 }
1273         }
1274
1275         adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent);
1276 out:
1277         kfree(inq_buff);
1278         kfree(ld_buff);
1279         kfree(currentsd);
1280         return;
1281 }
1282
1283 static int
1284 is_keyword(char *ptr, int len, char *verb)  // Thanks to ncr53c8xx.c
1285 {
1286         int verb_len = strlen(verb);
1287         if (len >= verb_len && !memcmp(verb,ptr,verb_len))
1288                 return verb_len;
1289         else
1290                 return 0;
1291 }
1292
1293 static int
1294 cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length)
1295 {
1296         int arg_len;
1297
1298         if ((arg_len = is_keyword(buffer, length, "rescan")) != 0)
1299                 cciss_update_non_disk_devices(h, hostno);
1300         else
1301                 return -EINVAL;
1302         return length;
1303 }
1304
1305
1306 static int
1307 cciss_scsi_proc_info(struct Scsi_Host *sh,
1308                 char *buffer, /* data buffer */
1309                 char **start,      /* where data in buffer starts */
1310                 off_t offset,      /* offset from start of imaginary file */
1311                 int length,        /* length of data in buffer */
1312                 int func)          /* 0 == read, 1 == write */
1313 {
1314
1315         int buflen, datalen;
1316         ctlr_info_t *h;
1317         int i;
1318
1319         h = (ctlr_info_t *) sh->hostdata[0];
1320         if (h == NULL)  /* This really shouldn't ever happen. */
1321                 return -EINVAL;
1322
1323         if (func == 0) {        /* User is reading from /proc/scsi/ciss*?/?*  */
1324                 buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n",
1325                                 h->ctlr, sh->host_no);
1326
1327                 /* this information is needed by apps to know which cciss
1328                    device corresponds to which scsi host number without
1329                    having to open a scsi target device node.  The device
1330                    information is not a duplicate of /proc/scsi/scsi because
1331                    the two may be out of sync due to scsi hotplug, rather
1332                    this info is for an app to be able to use to know how to
1333                    get them back in sync. */
1334
1335                 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
1336                         struct cciss_scsi_dev_t *sd =
1337                                 &ccissscsi[h->ctlr].dev[i];
1338                         buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d "
1339                                 "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
1340                                 sh->host_no, sd->bus, sd->target, sd->lun,
1341                                 sd->devtype,
1342                                 sd->scsi3addr[0], sd->scsi3addr[1],
1343                                 sd->scsi3addr[2], sd->scsi3addr[3],
1344                                 sd->scsi3addr[4], sd->scsi3addr[5],
1345                                 sd->scsi3addr[6], sd->scsi3addr[7]);
1346                 }
1347                 datalen = buflen - offset;
1348                 if (datalen < 0) {      /* they're reading past EOF. */
1349                         datalen = 0;
1350                         *start = buffer+buflen;
1351                 } else
1352                         *start = buffer + offset;
1353                 return(datalen);
1354         } else  /* User is writing to /proc/scsi/cciss*?/?*  ... */
1355                 return cciss_scsi_user_command(h, sh->host_no,
1356                         buffer, length);
1357 }
1358
1359 /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1360    dma mapping  and fills in the scatter gather entries of the
1361    cciss command, c. */
1362
1363 static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c,
1364         struct scsi_cmnd *cmd)
1365 {
1366         unsigned int len;
1367         struct scatterlist *sg;
1368         __u64 addr64;
1369         int request_nsgs, i, chained, sg_index;
1370         struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr;
1371         SGDescriptor_struct *curr_sg;
1372
1373         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1374
1375         chained = 0;
1376         sg_index = 0;
1377         curr_sg = c->SG;
1378         request_nsgs = scsi_dma_map(cmd);
1379         if (request_nsgs) {
1380                 scsi_for_each_sg(cmd, sg, request_nsgs, i) {
1381                         if (sg_index + 1 == h->max_cmd_sgentries &&
1382                                 !chained && request_nsgs - i > 1) {
1383                                 chained = 1;
1384                                 sg_index = 0;
1385                                 curr_sg = sa->cmd_sg_list[c->cmdindex];
1386                         }
1387                         addr64 = (__u64) sg_dma_address(sg);
1388                         len  = sg_dma_len(sg);
1389                         curr_sg[sg_index].Addr.lower =
1390                                 (__u32) (addr64 & 0x0FFFFFFFFULL);
1391                         curr_sg[sg_index].Addr.upper =
1392                                 (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1393                         curr_sg[sg_index].Len = len;
1394                         curr_sg[sg_index].Ext = 0;
1395                         ++sg_index;
1396                 }
1397                 if (chained)
1398                         cciss_map_sg_chain_block(h, c,
1399                                 sa->cmd_sg_list[c->cmdindex],
1400                                 (request_nsgs - (h->max_cmd_sgentries - 1)) *
1401                                         sizeof(SGDescriptor_struct));
1402         }
1403         /* track how many SG entries we are using */
1404         if (request_nsgs > h->maxSG)
1405                 h->maxSG = request_nsgs;
1406         c->Header.SGTotal = (u16) request_nsgs + chained;
1407         if (request_nsgs > h->max_cmd_sgentries)
1408                 c->Header.SGList = h->max_cmd_sgentries;
1409         else
1410                 c->Header.SGList = c->Header.SGTotal;
1411         return;
1412 }
1413
1414
1415 static int
1416 cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1417 {
1418         ctlr_info_t *h;
1419         int rc;
1420         unsigned char scsi3addr[8];
1421         CommandList_struct *c;
1422         unsigned long flags;
1423
1424         // Get the ptr to our adapter structure (hba[i]) out of cmd->host.
1425         // We violate cmd->host privacy here.  (Is there another way?)
1426         h = (ctlr_info_t *) cmd->device->host->hostdata[0];
1427
1428         rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id,
1429                         cmd->device->lun, scsi3addr);
1430         if (rc != 0) {
1431                 /* the scsi nexus does not match any that we presented... */
1432                 /* pretend to mid layer that we got selection timeout */
1433                 cmd->result = DID_NO_CONNECT << 16;
1434                 done(cmd);
1435                 /* we might want to think about registering controller itself
1436                    as a processor device on the bus so sg binds to it. */
1437                 return 0;
1438         }
1439
1440         /* Ok, we have a reasonable scsi nexus, so send the cmd down, and
1441            see what the device thinks of it. */
1442
1443         spin_lock_irqsave(&h->lock, flags);
1444         c = scsi_cmd_alloc(h);
1445         spin_unlock_irqrestore(&h->lock, flags);
1446         if (c == NULL) {                        /* trouble... */
1447                 dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n");
1448                 /* FIXME: next 3 lines are -> BAD! <- */
1449                 cmd->result = DID_NO_CONNECT << 16;
1450                 done(cmd);
1451                 return 0;
1452         }
1453
1454         // Fill in the command list header
1455
1456         cmd->scsi_done = done;    // save this for use by completion code
1457
1458         /* save c in case we have to abort it */
1459         cmd->host_scribble = (unsigned char *) c;
1460
1461         c->cmd_type = CMD_SCSI;
1462         c->scsi_cmd = cmd;
1463         c->Header.ReplyQueue = 0;  /* unused in simple mode */
1464         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1465         c->Header.Tag.lower = c->busaddr;  /* Use k. address of cmd as tag */
1466
1467         // Fill in the request block...
1468
1469         c->Request.Timeout = 0;
1470         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1471         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1472         c->Request.CDBLen = cmd->cmd_len;
1473         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1474         c->Request.Type.Type = TYPE_CMD;
1475         c->Request.Type.Attribute = ATTR_SIMPLE;
1476         switch(cmd->sc_data_direction)
1477         {
1478           case DMA_TO_DEVICE:
1479                 c->Request.Type.Direction = XFER_WRITE;
1480                 break;
1481           case DMA_FROM_DEVICE:
1482                 c->Request.Type.Direction = XFER_READ;
1483                 break;
1484           case DMA_NONE:
1485                 c->Request.Type.Direction = XFER_NONE;
1486                 break;
1487           case DMA_BIDIRECTIONAL:
1488                 // This can happen if a buggy application does a scsi passthru
1489                 // and sets both inlen and outlen to non-zero. ( see
1490                 // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1491
1492                 c->Request.Type.Direction = XFER_RSVD;
1493                 // This is technically wrong, and cciss controllers should
1494                 // reject it with CMD_INVALID, which is the most correct
1495                 // response, but non-fibre backends appear to let it
1496                 // slide by, and give the same results as if this field
1497                 // were set correctly.  Either way is acceptable for
1498                 // our purposes here.
1499
1500                 break;
1501
1502           default:
1503                 dev_warn(&h->pdev->dev, "unknown data direction: %d\n",
1504                         cmd->sc_data_direction);
1505                 BUG();
1506                 break;
1507         }
1508         cciss_scatter_gather(h, c, cmd);
1509         enqueue_cmd_and_start_io(h, c);
1510         /* the cmd'll come back via intr handler in complete_scsi_command()  */
1511         return 0;
1512 }
1513
1514 static DEF_SCSI_QCMD(cciss_scsi_queue_command)
1515
1516 static 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
1544 static 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                 dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n");
1556                 spin_unlock_irqrestore(&h->lock, flags);
1557                 return -ENXIO;
1558         }
1559         sa->registered = 1;
1560         spin_unlock_irqrestore(&h->lock, flags);
1561         cciss_update_non_disk_devices(h, -1);
1562         cciss_scsi_detect(h);
1563         return 0;
1564 }
1565
1566 static void
1567 cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h)
1568 {
1569         unsigned long flags;
1570
1571         CPQ_TAPE_LOCK(h, flags);
1572         seq_printf(seq,
1573                 "Sequential access devices: %d\n\n",
1574                         ccissscsi[h->ctlr].ndevices);
1575         CPQ_TAPE_UNLOCK(h, flags);
1576 }
1577
1578 static int wait_for_device_to_become_ready(ctlr_info_t *h,
1579         unsigned char lunaddr[])
1580 {
1581         int rc;
1582         int count = 0;
1583         int waittime = HZ;
1584         CommandList_struct *c;
1585
1586         c = cmd_alloc(h);
1587         if (!c) {
1588                 dev_warn(&h->pdev->dev, "out of memory in "
1589                         "wait_for_device_to_become_ready.\n");
1590                 return IO_ERROR;
1591         }
1592
1593         /* Send test unit ready until device ready, or give up. */
1594         while (count < 20) {
1595
1596                 /* Wait for a bit.  do this first, because if we send
1597                  * the TUR right away, the reset will just abort it.
1598                  */
1599                 schedule_timeout_uninterruptible(waittime);
1600                 count++;
1601
1602                 /* Increase wait time with each try, up to a point. */
1603                 if (waittime < (HZ * 30))
1604                         waittime = waittime * 2;
1605
1606                 /* Send the Test Unit Ready */
1607                 rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0,
1608                         lunaddr, TYPE_CMD);
1609                 if (rc == 0)
1610                         rc = sendcmd_withirq_core(h, c, 0);
1611
1612                 (void) process_sendcmd_error(h, c);
1613
1614                 if (rc != 0)
1615                         goto retry_tur;
1616
1617                 if (c->err_info->CommandStatus == CMD_SUCCESS)
1618                         break;
1619
1620                 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1621                         c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1622                         if (c->err_info->SenseInfo[2] == NO_SENSE)
1623                                 break;
1624                         if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) {
1625                                 unsigned char asc;
1626                                 asc = c->err_info->SenseInfo[12];
1627                                 check_for_unit_attention(h, c);
1628                                 if (asc == POWER_OR_RESET)
1629                                         break;
1630                         }
1631                 }
1632 retry_tur:
1633                 dev_warn(&h->pdev->dev, "Waiting %d secs "
1634                         "for device to become ready.\n",
1635                         waittime / HZ);
1636                 rc = 1; /* device not ready. */
1637         }
1638
1639         if (rc)
1640                 dev_warn(&h->pdev->dev, "giving up on device.\n");
1641         else
1642                 dev_warn(&h->pdev->dev, "device is ready.\n");
1643
1644         cmd_free(h, c);
1645         return rc;
1646 }
1647
1648 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
1649  * complaining.  Doing a host- or bus-reset can't do anything good here.
1650  * Despite what it might say in scsi_error.c, there may well be commands
1651  * on the controller, as the cciss driver registers twice, once as a block
1652  * device for the logical drives, and once as a scsi device, for any tape
1653  * drives.  So we know there are no commands out on the tape drives, but we
1654  * don't know there are no commands on the controller, and it is likely
1655  * that there probably are, as the cciss block device is most commonly used
1656  * as a boot device (embedded controller on HP/Compaq systems.)
1657 */
1658
1659 static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
1660 {
1661         int rc;
1662         CommandList_struct *cmd_in_trouble;
1663         unsigned char lunaddr[8];
1664         ctlr_info_t *h;
1665
1666         /* find the controller to which the command to be aborted was sent */
1667         h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1668         if (h == NULL) /* paranoia */
1669                 return FAILED;
1670         dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n");
1671         /* find the command that's giving us trouble */
1672         cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
1673         if (cmd_in_trouble == NULL) /* paranoia */
1674                 return FAILED;
1675         memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8);
1676         /* send a reset to the SCSI LUN which the command was sent to */
1677         rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr,
1678                 TYPE_MSG);
1679         if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0)
1680                 return SUCCESS;
1681         dev_warn(&h->pdev->dev, "resetting device failed.\n");
1682         return FAILED;
1683 }
1684
1685 static int  cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
1686 {
1687         int rc;
1688         CommandList_struct *cmd_to_abort;
1689         unsigned char lunaddr[8];
1690         ctlr_info_t *h;
1691
1692         /* find the controller to which the command to be aborted was sent */
1693         h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1694         if (h == NULL) /* paranoia */
1695                 return FAILED;
1696         dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n");
1697
1698         /* find the command to be aborted */
1699         cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
1700         if (cmd_to_abort == NULL) /* paranoia */
1701                 return FAILED;
1702         memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8);
1703         rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag,
1704                 0, 0, lunaddr, TYPE_MSG);
1705         if (rc == 0)
1706                 return SUCCESS;
1707         return FAILED;
1708
1709 }
1710
1711 #else /* no CONFIG_CISS_SCSI_TAPE */
1712
1713 /* If no tape support, then these become defined out of existence */
1714
1715 #define cciss_scsi_setup(cntl_num)
1716 #define cciss_engage_scsi(h)
1717
1718 #endif /* CONFIG_CISS_SCSI_TAPE */