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                                 dev_warn(&h->pdev->dev,
 799                                         "%p has protocol error\n", c);
 800                         break;
 801                         case CMD_HARDWARE_ERR:
 802                                 cmd->result = DID_ERROR << 16;
 803                                 dev_warn(&h->pdev->dev,
 804                                         "%p had hardware error\n", c);
 805                         break;
 806                         case CMD_CONNECTION_LOST:
 807                                 cmd->result = DID_ERROR << 16;
 808                                 dev_warn(&h->pdev->dev,
 809                                         "%p had connection lost\n", c);
 810                         break;
 811                         case CMD_ABORTED:
 812                                 cmd->result = DID_ABORT << 16;
 813                                 dev_warn(&h->pdev->dev, "%p was aborted\n", c);
 814                         break;
 815                         case CMD_ABORT_FAILED:
 816                                 cmd->result = DID_ERROR << 16;
 817                                 dev_warn(&h->pdev->dev,
 818                                         "%p reports abort failed\n", c);
 819                         break;
 820                         case CMD_UNSOLICITED_ABORT:
 821                                 cmd->result = DID_ABORT << 16;
 822                                 dev_warn(&h->pdev->dev, "%p aborted due to an "
 823                                         "unsolicited abort\n", c);
 824                         break;
 825                         case CMD_TIMEOUT:
 826                                 cmd->result = DID_TIME_OUT << 16;
 827                                 dev_warn(&h->pdev->dev, "%p timedout\n", c);
 828                         break;
 829                         case CMD_UNABORTABLE:
 830                                 cmd->result = DID_ERROR << 16;
 831                                 dev_warn(&h->pdev->dev, "c %p command "
 832                                         "unabortable\n", c);
 833                         break;
 834                         default:
 835                                 cmd->result = DID_ERROR << 16;
 836                                 dev_warn(&h->pdev->dev,
 837                                         "%p returned unknown status %x\n", c,
 838                                                 ei->CommandStatus);
 839                 }
 840         }
 841         cmd->scsi_done(cmd);
 842         scsi_cmd_free(h, c);
 843 }
 844
 845 static int
 846 cciss_scsi_detect(ctlr_info_t *h)
 847 {
 848         struct Scsi_Host *sh;
 849         int error;
 850
 851         sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *));
 852         if (sh == NULL)
 853                 goto fail;
 854         sh->io_port = 0;        // good enough?  FIXME,
 855         sh->n_io_port = 0;      // I don't think we use these two...
 856         sh->this_id = SELF_SCSI_ID;
 857         sh->can_queue = cciss_tape_cmds;
 858         sh->sg_tablesize = h->maxsgentries;
 859         sh->max_cmd_len = MAX_COMMAND_SIZE;
 860         sh->max_sectors = h->cciss_max_sectors;
 861
 862         ((struct cciss_scsi_adapter_data_t *)
 863                 h->scsi_ctlr)->scsi_host = sh;
 864         sh->hostdata[0] = (unsigned long) h;
 865         sh->irq = h->intr[SIMPLE_MODE_INT];
 866         sh->unique_id = sh->irq;
 867         error = scsi_add_host(sh, &h->pdev->dev);
 868         if (error)
 869                 goto fail_host_put;
 870         scsi_scan_host(sh);
 871         return 1;
 872
 873  fail_host_put:
 874         scsi_host_put(sh);
 875  fail:
 876         return 0;
 877 }
 878
 879 static void
 880 cciss_unmap_one(struct pci_dev *pdev,
 881                 CommandList_struct *c,
 882                 size_t buflen,
 883                 int data_direction)
 884 {
 885         u64bit addr64;
 886
 887         addr64.val32.lower = c->SG[0].Addr.lower;
 888         addr64.val32.upper = c->SG[0].Addr.upper;
 889         pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction);
 890 }
 891
 892 static void
 893 cciss_map_one(struct pci_dev *pdev,
 894                 CommandList_struct *c,
 895                 unsigned char *buf,
 896                 size_t buflen,
 897                 int data_direction)
 898 {
 899         __u64 addr64;
 900
 901         addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction);
 902         c->SG[0].Addr.lower =
 903           (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
 904         c->SG[0].Addr.upper =
 905           (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
 906         c->SG[0].Len = buflen;
 907         c->Header.SGList = (__u8) 1;   /* no. SGs contig in this cmd */
 908         c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
 909 }
 910
 911 static int
 912 cciss_scsi_do_simple_cmd(ctlr_info_t *h,
 913                         CommandList_struct *c,
 914                         unsigned char *scsi3addr,
 915                         unsigned char *cdb,
 916                         unsigned char cdblen,
 917                         unsigned char *buf, int bufsize,
 918                         int direction)
 919 {
 920         DECLARE_COMPLETION_ONSTACK(wait);
 921
 922         c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */
 923         c->scsi_cmd = NULL;
 924         c->Header.ReplyQueue = 0;  /* unused in simple mode */
 925         memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN));
 926         c->Header.Tag.lower = c->busaddr;  /* Use k. address of cmd as tag */
 927         // Fill in the request block...
 928
 929         /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n",
 930                 scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
 931                 scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */
 932
 933         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
 934         memcpy(c->Request.CDB, cdb, cdblen);
 935         c->Request.Timeout = 0;
 936         c->Request.CDBLen = cdblen;
 937         c->Request.Type.Type = TYPE_CMD;
 938         c->Request.Type.Attribute = ATTR_SIMPLE;
 939         c->Request.Type.Direction = direction;
 940
 941         /* Fill in the SG list and do dma mapping */
 942         cciss_map_one(h->pdev, c, (unsigned char *) buf,
 943                         bufsize, DMA_FROM_DEVICE);
 944
 945         c->waiting = &wait;
 946         enqueue_cmd_and_start_io(h, c);
 947         wait_for_completion(&wait);
 948
 949         /* undo the dma mapping */
 950         cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE);
 951         return(0);
 952 }
 953
 954 static void
 955 cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c)
 956 {
 957         ErrorInfo_struct *ei;
 958
 959         ei = c->err_info;
 960         switch(ei->CommandStatus)
 961         {
 962                 case CMD_TARGET_STATUS:
 963                         dev_warn(&h->pdev->dev,
 964                                 "cmd %p has completed with errors\n", c);
 965                         dev_warn(&h->pdev->dev,
 966                                 "cmd %p has SCSI Status = %x\n",
 967                                 c, ei->ScsiStatus);
 968                         if (ei->ScsiStatus == 0)
 969                                 dev_warn(&h->pdev->dev,
 970                                 "SCSI status is abnormally zero.  "
 971                                 "(probably indicates selection timeout "
 972                                 "reported incorrectly due to a known "
 973                                 "firmware bug, circa July, 2001.)\n");
 974                 break;
 975                 case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
 976                         dev_info(&h->pdev->dev, "UNDERRUN\n");
 977                 break;
 978                 case CMD_DATA_OVERRUN:
 979                         dev_warn(&h->pdev->dev, "%p has"
 980                                 " completed with data overrun "
 981                                 "reported\n", c);
 982                 break;
 983                 case CMD_INVALID: {
 984                         /* controller unfortunately reports SCSI passthru's */
 985                         /* to non-existent targets as invalid commands. */
 986                         dev_warn(&h->pdev->dev,
 987                                 "%p is reported invalid (probably means "
 988                                 "target device no longer present)\n", c);
 989                         /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0);
 990                         print_cmd(c);  */
 991                         }
 992                 break;
 993                 case CMD_PROTOCOL_ERR:
 994                         dev_warn(&h->pdev->dev, "%p has protocol error\n", c);
 995                 break;
 996                 case CMD_HARDWARE_ERR:
 997                         /* cmd->result = DID_ERROR << 16; */
 998                         dev_warn(&h->pdev->dev, "%p had hardware error\n", c);
 999                 break;
1000                 case CMD_CONNECTION_LOST:
1001                         dev_warn(&h->pdev->dev, "%p had connection lost\n", c);
1002                 break;
1003                 case CMD_ABORTED:
1004                         dev_warn(&h->pdev->dev, "%p was aborted\n", c);
1005                 break;
1006                 case CMD_ABORT_FAILED:
1007                         dev_warn(&h->pdev->dev,
1008                                 "%p reports abort failed\n", c);
1009                 break;
1010                 case CMD_UNSOLICITED_ABORT:
1011                         dev_warn(&h->pdev->dev,
1012                                 "%p aborted due to an unsolicited abort\n", c);
1013                 break;
1014                 case CMD_TIMEOUT:
1015                         dev_warn(&h->pdev->dev, "%p timedout\n", c);
1016                 break;
1017                 case CMD_UNABORTABLE:
1018                         dev_warn(&h->pdev->dev,
1019                                 "%p unabortable\n", c);
1020                 break;
1021                 default:
1022                         dev_warn(&h->pdev->dev,
1023                                 "%p returned unknown status %x\n",
1024                                 c, ei->CommandStatus);
1025         }
1026 }
1027
1028 static int
1029 cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr,
1030         unsigned char page, unsigned char *buf,
1031         unsigned char bufsize)
1032 {
1033         int rc;
1034         CommandList_struct *c;
1035         char cdb[6];
1036         ErrorInfo_struct *ei;
1037         unsigned long flags;
1038
1039         spin_lock_irqsave(&h->lock, flags);
1040         c = scsi_cmd_alloc(h);
1041         spin_unlock_irqrestore(&h->lock, flags);
1042
1043         if (c == NULL) {                        /* trouble... */
1044                 printk("cmd_alloc returned NULL!\n");
1045                 return -1;
1046         }
1047
1048         ei = c->err_info;
1049
1050         cdb[0] = CISS_INQUIRY;
1051         cdb[1] = (page != 0);
1052         cdb[2] = page;
1053         cdb[3] = 0;
1054         cdb[4] = bufsize;
1055         cdb[5] = 0;
1056         rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb,
1057                                 6, buf, bufsize, XFER_READ);
1058
1059         if (rc != 0) return rc; /* something went wrong */
1060
1061         if (ei->CommandStatus != 0 &&
1062             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1063                 cciss_scsi_interpret_error(h, c);
1064                 rc = -1;
1065         }
1066         spin_lock_irqsave(&h->lock, flags);
1067         scsi_cmd_free(h, c);
1068         spin_unlock_irqrestore(&h->lock, flags);
1069         return rc;
1070 }
1071
1072 /* Get the device id from inquiry page 0x83 */
1073 static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr,
1074         unsigned char *device_id, int buflen)
1075 {
1076         int rc;
1077         unsigned char *buf;
1078
1079         if (buflen > 16)
1080                 buflen = 16;
1081         buf = kzalloc(64, GFP_KERNEL);
1082         if (!buf)
1083                 return -1;
1084         rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
1085         if (rc == 0)
1086                 memcpy(device_id, &buf[8], buflen);
1087         kfree(buf);
1088         return rc != 0;
1089 }
1090
1091 static int
1092 cciss_scsi_do_report_phys_luns(ctlr_info_t *h,
1093                 ReportLunData_struct *buf, int bufsize)
1094 {
1095         int rc;
1096         CommandList_struct *c;
1097         unsigned char cdb[12];
1098         unsigned char scsi3addr[8];
1099         ErrorInfo_struct *ei;
1100         unsigned long flags;
1101
1102         spin_lock_irqsave(&h->lock, flags);
1103         c = scsi_cmd_alloc(h);
1104         spin_unlock_irqrestore(&h->lock, flags);
1105         if (c == NULL) {                        /* trouble... */
1106                 printk("cmd_alloc returned NULL!\n");
1107                 return -1;
1108         }
1109
1110         memset(&scsi3addr[0], 0, 8); /* address the controller */
1111         cdb[0] = CISS_REPORT_PHYS;
1112         cdb[1] = 0;
1113         cdb[2] = 0;
1114         cdb[3] = 0;
1115         cdb[4] = 0;
1116         cdb[5] = 0;
1117         cdb[6] = (bufsize >> 24) & 0xFF;  //MSB
1118         cdb[7] = (bufsize >> 16) & 0xFF;
1119         cdb[8] = (bufsize >> 8) & 0xFF;
1120         cdb[9] = bufsize & 0xFF;
1121         cdb[10] = 0;
1122         cdb[11] = 0;
1123
1124         rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr,
1125                                 cdb, 12,
1126                                 (unsigned char *) buf,
1127                                 bufsize, XFER_READ);
1128
1129         if (rc != 0) return rc; /* something went wrong */
1130
1131         ei = c->err_info;
1132         if (ei->CommandStatus != 0 &&
1133             ei->CommandStatus != CMD_DATA_UNDERRUN) {
1134                 cciss_scsi_interpret_error(h, c);
1135                 rc = -1;
1136         }
1137         spin_lock_irqsave(&h->lock, flags);
1138         scsi_cmd_free(h, c);
1139         spin_unlock_irqrestore(&h->lock, flags);
1140         return rc;
1141 }
1142
1143 static void
1144 cciss_update_non_disk_devices(ctlr_info_t *h, int hostno)
1145 {
1146         /* the idea here is we could get notified from /proc
1147            that some devices have changed, so we do a report
1148            physical luns cmd, and adjust our list of devices
1149            accordingly.  (We can't rely on the scsi-mid layer just
1150            doing inquiries, because the "busses" that the scsi
1151            mid-layer probes are totally fabricated by this driver,
1152            so new devices wouldn't show up.
1153
1154            the scsi3addr's of devices won't change so long as the
1155            adapter is not reset.  That means we can rescan and
1156            tell which devices we already know about, vs. new
1157            devices, vs.  disappearing devices.
1158
1159            Also, if you yank out a tape drive, then put in a disk
1160            in it's place, (say, a configured volume from another
1161            array controller for instance)  _don't_ poke this driver
1162            (so it thinks it's still a tape, but _do_ poke the scsi
1163            mid layer, so it does an inquiry... the scsi mid layer
1164            will see the physical disk.  This would be bad.  Need to
1165            think about how to prevent that.  One idea would be to
1166            snoop all scsi responses and if an inquiry repsonse comes
1167            back that reports a disk, chuck it an return selection
1168            timeout instead and adjust our table...  Not sure i like
1169            that though.
1170
1171          */
1172 #define OBDR_TAPE_INQ_SIZE 49
1173 #define OBDR_TAPE_SIG "$DR-10"
1174         ReportLunData_struct *ld_buff;
1175         unsigned char *inq_buff;
1176         unsigned char scsi3addr[8];
1177         __u32 num_luns=0;
1178         unsigned char *ch;
1179         struct cciss_scsi_dev_t *currentsd, *this_device;
1180         int ncurrent=0;
1181         int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
1182         int i;
1183
1184         ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
1185         inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
1186         currentsd = kzalloc(sizeof(*currentsd) *
1187                         (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL);
1188         if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) {
1189                 printk(KERN_ERR "cciss: out of memory\n");
1190                 goto out;
1191         }
1192         this_device = &currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
1193         if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) {
1194                 ch = &ld_buff->LUNListLength[0];
1195                 num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8;
1196                 if (num_luns > CISS_MAX_PHYS_LUN) {
1197                         printk(KERN_WARNING
1198                                 "cciss: Maximum physical LUNs (%d) exceeded.  "
1199                                 "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN,
1200                                 num_luns - CISS_MAX_PHYS_LUN);
1201                         num_luns = CISS_MAX_PHYS_LUN;
1202                 }
1203         }
1204         else {
1205                 printk(KERN_ERR  "cciss: Report physical LUNs failed.\n");
1206                 goto out;
1207         }
1208
1209
1210         /* adjust our table of devices */
1211         for (i = 0; i < num_luns; i++) {
1212                 /* for each physical lun, do an inquiry */
1213                 if (ld_buff->LUN[i][3] & 0xC0) continue;
1214                 memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
1215                 memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8);
1216
1217                 if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
1218                         (unsigned char) OBDR_TAPE_INQ_SIZE) != 0)
1219                         /* Inquiry failed (msg printed already) */
1220                         continue; /* so we will skip this device. */
1221
1222                 this_device->devtype = (inq_buff[0] & 0x1f);
1223                 this_device->bus = -1;
1224                 this_device->target = -1;
1225                 this_device->lun = -1;
1226                 memcpy(this_device->scsi3addr, scsi3addr, 8);
1227                 memcpy(this_device->vendor, &inq_buff[8],
1228                         sizeof(this_device->vendor));
1229                 memcpy(this_device->model, &inq_buff[16],
1230                         sizeof(this_device->model));
1231                 memcpy(this_device->revision, &inq_buff[32],
1232                         sizeof(this_device->revision));
1233                 memset(this_device->device_id, 0,
1234                         sizeof(this_device->device_id));
1235                 cciss_scsi_get_device_id(h, scsi3addr,
1236                         this_device->device_id, sizeof(this_device->device_id));
1237
1238                 switch (this_device->devtype)
1239                 {
1240                   case 0x05: /* CD-ROM */ {
1241
1242                         /* We don't *really* support actual CD-ROM devices,
1243                          * just this "One Button Disaster Recovery" tape drive
1244                          * which temporarily pretends to be a CD-ROM drive.
1245                          * So we check that the device is really an OBDR tape
1246                          * device by checking for "$DR-10" in bytes 43-48 of
1247                          * the inquiry data.
1248                          */
1249                                 char obdr_sig[7];
1250
1251                                 strncpy(obdr_sig, &inq_buff[43], 6);
1252                                 obdr_sig[6] = '\0';
1253                                 if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
1254                                         /* Not OBDR device, ignore it. */
1255                                         break;
1256                         }
1257                         /* fall through . . . */
1258                   case 0x01: /* sequential access, (tape) */
1259                   case 0x08: /* medium changer */
1260                         if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
1261                                 printk(KERN_INFO "cciss%d: %s ignored, "
1262                                         "too many devices.\n", h->ctlr,
1263                                         scsi_device_type(this_device->devtype));
1264                                 break;
1265                         }
1266                         currentsd[ncurrent] = *this_device;
1267                         ncurrent++;
1268                         break;
1269                   default:
1270                         break;
1271                 }
1272         }
1273
1274         adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent);
1275 out:
1276         kfree(inq_buff);
1277         kfree(ld_buff);
1278         kfree(currentsd);
1279         return;
1280 }
1281
1282 static int
1283 is_keyword(char *ptr, int len, char *verb)  // Thanks to ncr53c8xx.c
1284 {
1285         int verb_len = strlen(verb);
1286         if (len >= verb_len && !memcmp(verb,ptr,verb_len))
1287                 return verb_len;
1288         else
1289                 return 0;
1290 }
1291
1292 static int
1293 cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length)
1294 {
1295         int arg_len;
1296
1297         if ((arg_len = is_keyword(buffer, length, "rescan")) != 0)
1298                 cciss_update_non_disk_devices(h, hostno);
1299         else
1300                 return -EINVAL;
1301         return length;
1302 }
1303
1304
1305 static int
1306 cciss_scsi_proc_info(struct Scsi_Host *sh,
1307                 char *buffer, /* data buffer */
1308                 char **start,      /* where data in buffer starts */
1309                 off_t offset,      /* offset from start of imaginary file */
1310                 int length,        /* length of data in buffer */
1311                 int func)          /* 0 == read, 1 == write */
1312 {
1313
1314         int buflen, datalen;
1315         ctlr_info_t *h;
1316         int i;
1317
1318         h = (ctlr_info_t *) sh->hostdata[0];
1319         if (h == NULL)  /* This really shouldn't ever happen. */
1320                 return -EINVAL;
1321
1322         if (func == 0) {        /* User is reading from /proc/scsi/ciss*?/?*  */
1323                 buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n",
1324                                 h->ctlr, sh->host_no);
1325
1326                 /* this information is needed by apps to know which cciss
1327                    device corresponds to which scsi host number without
1328                    having to open a scsi target device node.  The device
1329                    information is not a duplicate of /proc/scsi/scsi because
1330                    the two may be out of sync due to scsi hotplug, rather
1331                    this info is for an app to be able to use to know how to
1332                    get them back in sync. */
1333
1334                 for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
1335                         struct cciss_scsi_dev_t *sd =
1336                                 &ccissscsi[h->ctlr].dev[i];
1337                         buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d "
1338                                 "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
1339                                 sh->host_no, sd->bus, sd->target, sd->lun,
1340                                 sd->devtype,
1341                                 sd->scsi3addr[0], sd->scsi3addr[1],
1342                                 sd->scsi3addr[2], sd->scsi3addr[3],
1343                                 sd->scsi3addr[4], sd->scsi3addr[5],
1344                                 sd->scsi3addr[6], sd->scsi3addr[7]);
1345                 }
1346                 datalen = buflen - offset;
1347                 if (datalen < 0) {      /* they're reading past EOF. */
1348                         datalen = 0;
1349                         *start = buffer+buflen;
1350                 } else
1351                         *start = buffer + offset;
1352                 return(datalen);
1353         } else  /* User is writing to /proc/scsi/cciss*?/?*  ... */
1354                 return cciss_scsi_user_command(h, sh->host_no,
1355                         buffer, length);
1356 }
1357
1358 /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
1359    dma mapping  and fills in the scatter gather entries of the
1360    cciss command, c. */
1361
1362 static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c,
1363         struct scsi_cmnd *cmd)
1364 {
1365         unsigned int len;
1366         struct scatterlist *sg;
1367         __u64 addr64;
1368         int request_nsgs, i, chained, sg_index;
1369         struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr;
1370         SGDescriptor_struct *curr_sg;
1371
1372         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
1373
1374         chained = 0;
1375         sg_index = 0;
1376         curr_sg = c->SG;
1377         request_nsgs = scsi_dma_map(cmd);
1378         if (request_nsgs) {
1379                 scsi_for_each_sg(cmd, sg, request_nsgs, i) {
1380                         if (sg_index + 1 == h->max_cmd_sgentries &&
1381                                 !chained && request_nsgs - i > 1) {
1382                                 chained = 1;
1383                                 sg_index = 0;
1384                                 curr_sg = sa->cmd_sg_list[c->cmdindex];
1385                         }
1386                         addr64 = (__u64) sg_dma_address(sg);
1387                         len  = sg_dma_len(sg);
1388                         curr_sg[sg_index].Addr.lower =
1389                                 (__u32) (addr64 & 0x0FFFFFFFFULL);
1390                         curr_sg[sg_index].Addr.upper =
1391                                 (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
1392                         curr_sg[sg_index].Len = len;
1393                         curr_sg[sg_index].Ext = 0;
1394                         ++sg_index;
1395                 }
1396                 if (chained)
1397                         cciss_map_sg_chain_block(h, c,
1398                                 sa->cmd_sg_list[c->cmdindex],
1399                                 (request_nsgs - (h->max_cmd_sgentries - 1)) *
1400                                         sizeof(SGDescriptor_struct));
1401         }
1402         /* track how many SG entries we are using */
1403         if (request_nsgs > h->maxSG)
1404                 h->maxSG = request_nsgs;
1405         c->Header.SGTotal = (u16) request_nsgs + chained;
1406         if (request_nsgs > h->max_cmd_sgentries)
1407                 c->Header.SGList = h->max_cmd_sgentries;
1408         else
1409                 c->Header.SGList = c->Header.SGTotal;
1410         return;
1411 }
1412
1413
1414 static int
1415 cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1416 {
1417         ctlr_info_t *h;
1418         int rc;
1419         unsigned char scsi3addr[8];
1420         CommandList_struct *c;
1421         unsigned long flags;
1422
1423         // Get the ptr to our adapter structure (hba[i]) out of cmd->host.
1424         // We violate cmd->host privacy here.  (Is there another way?)
1425         h = (ctlr_info_t *) cmd->device->host->hostdata[0];
1426
1427         rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id,
1428                         cmd->device->lun, scsi3addr);
1429         if (rc != 0) {
1430                 /* the scsi nexus does not match any that we presented... */
1431                 /* pretend to mid layer that we got selection timeout */
1432                 cmd->result = DID_NO_CONNECT << 16;
1433                 done(cmd);
1434                 /* we might want to think about registering controller itself
1435                    as a processor device on the bus so sg binds to it. */
1436                 return 0;
1437         }
1438
1439         /* Ok, we have a reasonable scsi nexus, so send the cmd down, and
1440            see what the device thinks of it. */
1441
1442         spin_lock_irqsave(&h->lock, flags);
1443         c = scsi_cmd_alloc(h);
1444         spin_unlock_irqrestore(&h->lock, flags);
1445         if (c == NULL) {                        /* trouble... */
1446                 dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n");
1447                 /* FIXME: next 3 lines are -> BAD! <- */
1448                 cmd->result = DID_NO_CONNECT << 16;
1449                 done(cmd);
1450                 return 0;
1451         }
1452
1453         // Fill in the command list header
1454
1455         cmd->scsi_done = done;    // save this for use by completion code
1456
1457         /* save c in case we have to abort it */
1458         cmd->host_scribble = (unsigned char *) c;
1459
1460         c->cmd_type = CMD_SCSI;
1461         c->scsi_cmd = cmd;
1462         c->Header.ReplyQueue = 0;  /* unused in simple mode */
1463         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
1464         c->Header.Tag.lower = c->busaddr;  /* Use k. address of cmd as tag */
1465
1466         // Fill in the request block...
1467
1468         c->Request.Timeout = 0;
1469         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
1470         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
1471         c->Request.CDBLen = cmd->cmd_len;
1472         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
1473         c->Request.Type.Type = TYPE_CMD;
1474         c->Request.Type.Attribute = ATTR_SIMPLE;
1475         switch(cmd->sc_data_direction)
1476         {
1477           case DMA_TO_DEVICE:
1478                 c->Request.Type.Direction = XFER_WRITE;
1479                 break;
1480           case DMA_FROM_DEVICE:
1481                 c->Request.Type.Direction = XFER_READ;
1482                 break;
1483           case DMA_NONE:
1484                 c->Request.Type.Direction = XFER_NONE;
1485                 break;
1486           case DMA_BIDIRECTIONAL:
1487                 // This can happen if a buggy application does a scsi passthru
1488                 // and sets both inlen and outlen to non-zero. ( see
1489                 // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
1490
1491                 c->Request.Type.Direction = XFER_RSVD;
1492                 // This is technically wrong, and cciss controllers should
1493                 // reject it with CMD_INVALID, which is the most correct
1494                 // response, but non-fibre backends appear to let it
1495                 // slide by, and give the same results as if this field
1496                 // were set correctly.  Either way is acceptable for
1497                 // our purposes here.
1498
1499                 break;
1500
1501           default:
1502                 dev_warn(&h->pdev->dev, "unknown data direction: %d\n",
1503                         cmd->sc_data_direction);
1504                 BUG();
1505                 break;
1506         }
1507         cciss_scatter_gather(h, c, cmd);
1508         enqueue_cmd_and_start_io(h, c);
1509         /* the cmd'll come back via intr handler in complete_scsi_command()  */
1510         return 0;
1511 }
1512
1513 static DEF_SCSI_QCMD(cciss_scsi_queue_command)
1514
1515 static void cciss_unregister_scsi(ctlr_info_t *h)
1516 {
1517         struct cciss_scsi_adapter_data_t *sa;
1518         struct cciss_scsi_cmd_stack_t *stk;
1519         unsigned long flags;
1520
1521         /* we are being forcibly unloaded, and may not refuse. */
1522
1523         spin_lock_irqsave(&h->lock, flags);
1524         sa = h->scsi_ctlr;
1525         stk = &sa->cmd_stack;
1526
1527         /* if we weren't ever actually registered, don't unregister */
1528         if (sa->registered) {
1529                 spin_unlock_irqrestore(&h->lock, flags);
1530                 scsi_remove_host(sa->scsi_host);
1531                 scsi_host_put(sa->scsi_host);
1532                 spin_lock_irqsave(&h->lock, flags);
1533         }
1534
1535         /* set scsi_host to NULL so our detect routine will
1536            find us on register */
1537         sa->scsi_host = NULL;
1538         spin_unlock_irqrestore(&h->lock, flags);
1539         scsi_cmd_stack_free(h);
1540         kfree(sa);
1541 }
1542
1543 static int cciss_engage_scsi(ctlr_info_t *h)
1544 {
1545         struct cciss_scsi_adapter_data_t *sa;
1546         struct cciss_scsi_cmd_stack_t *stk;
1547         unsigned long flags;
1548
1549         spin_lock_irqsave(&h->lock, flags);
1550         sa = h->scsi_ctlr;
1551         stk = &sa->cmd_stack;
1552
1553         if (sa->registered) {
1554                 dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n");
1555                 spin_unlock_irqrestore(&h->lock, flags);
1556                 return -ENXIO;
1557         }
1558         sa->registered = 1;
1559         spin_unlock_irqrestore(&h->lock, flags);
1560         cciss_update_non_disk_devices(h, -1);
1561         cciss_scsi_detect(h);
1562         return 0;
1563 }
1564
1565 static void
1566 cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h)
1567 {
1568         unsigned long flags;
1569
1570         CPQ_TAPE_LOCK(h, flags);
1571         seq_printf(seq,
1572                 "Sequential access devices: %d\n\n",
1573                         ccissscsi[h->ctlr].ndevices);
1574         CPQ_TAPE_UNLOCK(h, flags);
1575 }
1576
1577 static int wait_for_device_to_become_ready(ctlr_info_t *h,
1578         unsigned char lunaddr[])
1579 {
1580         int rc;
1581         int count = 0;
1582         int waittime = HZ;
1583         CommandList_struct *c;
1584
1585         c = cmd_alloc(h);
1586         if (!c) {
1587                 dev_warn(&h->pdev->dev, "out of memory in "
1588                         "wait_for_device_to_become_ready.\n");
1589                 return IO_ERROR;
1590         }
1591
1592         /* Send test unit ready until device ready, or give up. */
1593         while (count < 20) {
1594
1595                 /* Wait for a bit.  do this first, because if we send
1596                  * the TUR right away, the reset will just abort it.
1597                  */
1598                 schedule_timeout_uninterruptible(waittime);
1599                 count++;
1600
1601                 /* Increase wait time with each try, up to a point. */
1602                 if (waittime < (HZ * 30))
1603                         waittime = waittime * 2;
1604
1605                 /* Send the Test Unit Ready */
1606                 rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0,
1607                         lunaddr, TYPE_CMD);
1608                 if (rc == 0)
1609                         rc = sendcmd_withirq_core(h, c, 0);
1610
1611                 (void) process_sendcmd_error(h, c);
1612
1613                 if (rc != 0)
1614                         goto retry_tur;
1615
1616                 if (c->err_info->CommandStatus == CMD_SUCCESS)
1617                         break;
1618
1619                 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1620                         c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
1621                         if (c->err_info->SenseInfo[2] == NO_SENSE)
1622                                 break;
1623                         if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) {
1624                                 unsigned char asc;
1625                                 asc = c->err_info->SenseInfo[12];
1626                                 check_for_unit_attention(h, c);
1627                                 if (asc == POWER_OR_RESET)
1628                                         break;
1629                         }
1630                 }
1631 retry_tur:
1632                 dev_warn(&h->pdev->dev, "Waiting %d secs "
1633                         "for device to become ready.\n",
1634                         waittime / HZ);
1635                 rc = 1; /* device not ready. */
1636         }
1637
1638         if (rc)
1639                 dev_warn(&h->pdev->dev, "giving up on device.\n");
1640         else
1641                 dev_warn(&h->pdev->dev, "device is ready.\n");
1642
1643         cmd_free(h, c);
1644         return rc;
1645 }
1646
1647 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
1648  * complaining.  Doing a host- or bus-reset can't do anything good here.
1649  * Despite what it might say in scsi_error.c, there may well be commands
1650  * on the controller, as the cciss driver registers twice, once as a block
1651  * device for the logical drives, and once as a scsi device, for any tape
1652  * drives.  So we know there are no commands out on the tape drives, but we
1653  * don't know there are no commands on the controller, and it is likely
1654  * that there probably are, as the cciss block device is most commonly used
1655  * as a boot device (embedded controller on HP/Compaq systems.)
1656 */
1657
1658 static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
1659 {
1660         int rc;
1661         CommandList_struct *cmd_in_trouble;
1662         unsigned char lunaddr[8];
1663         ctlr_info_t *h;
1664
1665         /* find the controller to which the command to be aborted was sent */
1666         h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1667         if (h == NULL) /* paranoia */
1668                 return FAILED;
1669         dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n");
1670         /* find the command that's giving us trouble */
1671         cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
1672         if (cmd_in_trouble == NULL) /* paranoia */
1673                 return FAILED;
1674         memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8);
1675         /* send a reset to the SCSI LUN which the command was sent to */
1676         rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr,
1677                 TYPE_MSG);
1678         if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0)
1679                 return SUCCESS;
1680         dev_warn(&h->pdev->dev, "resetting device failed.\n");
1681         return FAILED;
1682 }
1683
1684 static int  cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
1685 {
1686         int rc;
1687         CommandList_struct *cmd_to_abort;
1688         unsigned char lunaddr[8];
1689         ctlr_info_t *h;
1690
1691         /* find the controller to which the command to be aborted was sent */
1692         h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
1693         if (h == NULL) /* paranoia */
1694                 return FAILED;
1695         dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n");
1696
1697         /* find the command to be aborted */
1698         cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
1699         if (cmd_to_abort == NULL) /* paranoia */
1700                 return FAILED;
1701         memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8);
1702         rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag,
1703                 0, 0, lunaddr, TYPE_MSG);
1704         if (rc == 0)
1705                 return SUCCESS;
1706         return FAILED;
1707
1708 }
1709
1710 #else /* no CONFIG_CISS_SCSI_TAPE */
1711
1712 /* If no tape support, then these become defined out of existence */
1713
1714 #define cciss_scsi_setup(cntl_num)
1715 #define cciss_engage_scsi(h)
1716
1717 #endif /* CONFIG_CISS_SCSI_TAPE */