err.no Git - linux-2.6/blob - drivers/firewire/fw-sbp2.c

   1 /*
   2  * SBP2 driver (SCSI over IEEE1394)
   3  *
   4  * Copyright (C) 2005-2007  Kristian Hoegsberg <krh@bitplanet.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22  * The basic structure of this driver is based on the old storage driver,
  23  * drivers/ieee1394/sbp2.c, originally written by
  24  *     James Goodwin <jamesg@filanet.com>
  25  * with later contributions and ongoing maintenance from
  26  *     Ben Collins <bcollins@debian.org>,
  27  *     Stefan Richter <stefanr@s5r6.in-berlin.de>
  28  * and many others.
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/moduleparam.h>
  34 #include <linux/mod_devicetable.h>
  35 #include <linux/device.h>
  36 #include <linux/scatterlist.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/blkdev.h>
  39 #include <linux/string.h>
  40 #include <linux/timer.h>
  41
  42 #include <scsi/scsi.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <scsi/scsi_dbg.h>
  45 #include <scsi/scsi_device.h>
  46 #include <scsi/scsi_host.h>
  47
  48 #include "fw-transaction.h"
  49 #include "fw-topology.h"
  50 #include "fw-device.h"
  51
  52 /*
  53  * So far only bridges from Oxford Semiconductor are known to support
  54  * concurrent logins. Depending on firmware, four or two concurrent logins
  55  * are possible on OXFW911 and newer Oxsemi bridges.
  56  *
  57  * Concurrent logins are useful together with cluster filesystems.
  58  */
  59 static int sbp2_param_exclusive_login = 1;
  60 module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644);
  61 MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
  62                  "(default = Y, use N for concurrent initiators)");
  63
  64 /* I don't know why the SCSI stack doesn't define something like this... */
  65 typedef void (*scsi_done_fn_t)(struct scsi_cmnd *);
  66
  67 static const char sbp2_driver_name[] = "sbp2";
  68
  69 struct sbp2_device {
  70         struct kref kref;
  71         struct fw_unit *unit;
  72         struct fw_address_handler address_handler;
  73         struct list_head orb_list;
  74         u64 management_agent_address;
  75         u64 command_block_agent_address;
  76         u32 workarounds;
  77         int login_id;
  78
  79         /*
  80          * We cache these addresses and only update them once we've
  81          * logged in or reconnected to the sbp2 device.  That way, any
  82          * IO to the device will automatically fail and get retried if
  83          * it happens in a window where the device is not ready to
  84          * handle it (e.g. after a bus reset but before we reconnect).
  85          */
  86         int node_id;
  87         int address_high;
  88         int generation;
  89
  90         int retries;
  91         struct delayed_work work;
  92 };
  93
  94 #define SBP2_MAX_SG_ELEMENT_LENGTH      0xf000
  95 #define SBP2_MAX_SECTORS                255     /* Max sectors supported */
  96 #define SBP2_ORB_TIMEOUT                2000    /* Timeout in ms */
  97
  98 #define SBP2_ORB_NULL                   0x80000000
  99
 100 #define SBP2_DIRECTION_TO_MEDIA         0x0
 101 #define SBP2_DIRECTION_FROM_MEDIA       0x1
 102
 103 /* Unit directory keys */
 104 #define SBP2_COMMAND_SET_SPECIFIER      0x38
 105 #define SBP2_COMMAND_SET                0x39
 106 #define SBP2_COMMAND_SET_REVISION       0x3b
 107 #define SBP2_FIRMWARE_REVISION          0x3c
 108
 109 /* Flags for detected oddities and brokeness */
 110 #define SBP2_WORKAROUND_128K_MAX_TRANS  0x1
 111 #define SBP2_WORKAROUND_INQUIRY_36      0x2
 112 #define SBP2_WORKAROUND_MODE_SENSE_8    0x4
 113 #define SBP2_WORKAROUND_FIX_CAPACITY    0x8
 114 #define SBP2_WORKAROUND_OVERRIDE        0x100
 115
 116 /* Management orb opcodes */
 117 #define SBP2_LOGIN_REQUEST              0x0
 118 #define SBP2_QUERY_LOGINS_REQUEST       0x1
 119 #define SBP2_RECONNECT_REQUEST          0x3
 120 #define SBP2_SET_PASSWORD_REQUEST       0x4
 121 #define SBP2_LOGOUT_REQUEST             0x7
 122 #define SBP2_ABORT_TASK_REQUEST         0xb
 123 #define SBP2_ABORT_TASK_SET             0xc
 124 #define SBP2_LOGICAL_UNIT_RESET         0xe
 125 #define SBP2_TARGET_RESET_REQUEST       0xf
 126
 127 /* Offsets for command block agent registers */
 128 #define SBP2_AGENT_STATE                0x00
 129 #define SBP2_AGENT_RESET                0x04
 130 #define SBP2_ORB_POINTER                0x08
 131 #define SBP2_DOORBELL                   0x10
 132 #define SBP2_UNSOLICITED_STATUS_ENABLE  0x14
 133
 134 /* Status write response codes */
 135 #define SBP2_STATUS_REQUEST_COMPLETE    0x0
 136 #define SBP2_STATUS_TRANSPORT_FAILURE   0x1
 137 #define SBP2_STATUS_ILLEGAL_REQUEST     0x2
 138 #define SBP2_STATUS_VENDOR_DEPENDENT    0x3
 139
 140 #define STATUS_GET_ORB_HIGH(v)          ((v).status & 0xffff)
 141 #define STATUS_GET_SBP_STATUS(v)        (((v).status >> 16) & 0xff)
 142 #define STATUS_GET_LEN(v)               (((v).status >> 24) & 0x07)
 143 #define STATUS_GET_DEAD(v)              (((v).status >> 27) & 0x01)
 144 #define STATUS_GET_RESPONSE(v)          (((v).status >> 28) & 0x03)
 145 #define STATUS_GET_SOURCE(v)            (((v).status >> 30) & 0x03)
 146 #define STATUS_GET_ORB_LOW(v)           ((v).orb_low)
 147 #define STATUS_GET_DATA(v)              ((v).data)
 148
 149 struct sbp2_status {
 150         u32 status;
 151         u32 orb_low;
 152         u8 data[24];
 153 };
 154
 155 struct sbp2_pointer {
 156         u32 high;
 157         u32 low;
 158 };
 159
 160 struct sbp2_orb {
 161         struct fw_transaction t;
 162         struct kref kref;
 163         dma_addr_t request_bus;
 164         int rcode;
 165         struct sbp2_pointer pointer;
 166         void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status);
 167         struct list_head link;
 168 };
 169
 170 #define MANAGEMENT_ORB_LUN(v)                   ((v))
 171 #define MANAGEMENT_ORB_FUNCTION(v)              ((v) << 16)
 172 #define MANAGEMENT_ORB_RECONNECT(v)             ((v) << 20)
 173 #define MANAGEMENT_ORB_EXCLUSIVE(v)             ((v) ? 1 << 28 : 0)
 174 #define MANAGEMENT_ORB_REQUEST_FORMAT(v)        ((v) << 29)
 175 #define MANAGEMENT_ORB_NOTIFY                   ((1) << 31)
 176
 177 #define MANAGEMENT_ORB_RESPONSE_LENGTH(v)       ((v))
 178 #define MANAGEMENT_ORB_PASSWORD_LENGTH(v)       ((v) << 16)
 179
 180 struct sbp2_management_orb {
 181         struct sbp2_orb base;
 182         struct {
 183                 struct sbp2_pointer password;
 184                 struct sbp2_pointer response;
 185                 u32 misc;
 186                 u32 length;
 187                 struct sbp2_pointer status_fifo;
 188         } request;
 189         __be32 response[4];
 190         dma_addr_t response_bus;
 191         struct completion done;
 192         struct sbp2_status status;
 193 };
 194
 195 #define LOGIN_RESPONSE_GET_LOGIN_ID(v)  ((v).misc & 0xffff)
 196 #define LOGIN_RESPONSE_GET_LENGTH(v)    (((v).misc >> 16) & 0xffff)
 197
 198 struct sbp2_login_response {
 199         u32 misc;
 200         struct sbp2_pointer command_block_agent;
 201         u32 reconnect_hold;
 202 };
 203 #define COMMAND_ORB_DATA_SIZE(v)        ((v))
 204 #define COMMAND_ORB_PAGE_SIZE(v)        ((v) << 16)
 205 #define COMMAND_ORB_PAGE_TABLE_PRESENT  ((1) << 19)
 206 #define COMMAND_ORB_MAX_PAYLOAD(v)      ((v) << 20)
 207 #define COMMAND_ORB_SPEED(v)            ((v) << 24)
 208 #define COMMAND_ORB_DIRECTION(v)        ((v) << 27)
 209 #define COMMAND_ORB_REQUEST_FORMAT(v)   ((v) << 29)
 210 #define COMMAND_ORB_NOTIFY              ((1) << 31)
 211
 212 struct sbp2_command_orb {
 213         struct sbp2_orb base;
 214         struct {
 215                 struct sbp2_pointer next;
 216                 struct sbp2_pointer data_descriptor;
 217                 u32 misc;
 218                 u8 command_block[12];
 219         } request;
 220         struct scsi_cmnd *cmd;
 221         scsi_done_fn_t done;
 222         struct fw_unit *unit;
 223
 224         struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8)));
 225         dma_addr_t page_table_bus;
 226 };
 227
 228 /*
 229  * List of devices with known bugs.
 230  *
 231  * The firmware_revision field, masked with 0xffff00, is the best
 232  * indicator for the type of bridge chip of a device.  It yields a few
 233  * false positives but this did not break correctly behaving devices
 234  * so far.  We use ~0 as a wildcard, since the 24 bit values we get
 235  * from the config rom can never match that.
 236  */
 237 static const struct {
 238         u32 firmware_revision;
 239         u32 model;
 240         unsigned workarounds;
 241 } sbp2_workarounds_table[] = {
 242         /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
 243                 .firmware_revision      = 0x002800,
 244                 .model                  = 0x001010,
 245                 .workarounds            = SBP2_WORKAROUND_INQUIRY_36 |
 246                                           SBP2_WORKAROUND_MODE_SENSE_8,
 247         },
 248         /* Initio bridges, actually only needed for some older ones */ {
 249                 .firmware_revision      = 0x000200,
 250                 .model                  = ~0,
 251                 .workarounds            = SBP2_WORKAROUND_INQUIRY_36,
 252         },
 253         /* Symbios bridge */ {
 254                 .firmware_revision      = 0xa0b800,
 255                 .model                  = ~0,
 256                 .workarounds            = SBP2_WORKAROUND_128K_MAX_TRANS,
 257         },
 258
 259         /*
 260          * There are iPods (2nd gen, 3rd gen) with model_id == 0, but
 261          * these iPods do not feature the read_capacity bug according
 262          * to one report.  Read_capacity behaviour as well as model_id
 263          * could change due to Apple-supplied firmware updates though.
 264          */
 265
 266         /* iPod 4th generation. */ {
 267                 .firmware_revision      = 0x0a2700,
 268                 .model                  = 0x000021,
 269                 .workarounds            = SBP2_WORKAROUND_FIX_CAPACITY,
 270         },
 271         /* iPod mini */ {
 272                 .firmware_revision      = 0x0a2700,
 273                 .model                  = 0x000023,
 274                 .workarounds            = SBP2_WORKAROUND_FIX_CAPACITY,
 275         },
 276         /* iPod Photo */ {
 277                 .firmware_revision      = 0x0a2700,
 278                 .model                  = 0x00007e,
 279                 .workarounds            = SBP2_WORKAROUND_FIX_CAPACITY,
 280         }
 281 };
 282
 283 static void
 284 free_orb(struct kref *kref)
 285 {
 286         struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref);
 287
 288         kfree(orb);
 289 }
 290
 291 static void
 292 sbp2_status_write(struct fw_card *card, struct fw_request *request,
 293                   int tcode, int destination, int source,
 294                   int generation, int speed,
 295                   unsigned long long offset,
 296                   void *payload, size_t length, void *callback_data)
 297 {
 298         struct sbp2_device *sd = callback_data;
 299         struct sbp2_orb *orb;
 300         struct sbp2_status status;
 301         size_t header_size;
 302         unsigned long flags;
 303
 304         if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
 305             length == 0 || length > sizeof(status)) {
 306                 fw_send_response(card, request, RCODE_TYPE_ERROR);
 307                 return;
 308         }
 309
 310         header_size = min(length, 2 * sizeof(u32));
 311         fw_memcpy_from_be32(&status, payload, header_size);
 312         if (length > header_size)
 313                 memcpy(status.data, payload + 8, length - header_size);
 314         if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) {
 315                 fw_notify("non-orb related status write, not handled\n");
 316                 fw_send_response(card, request, RCODE_COMPLETE);
 317                 return;
 318         }
 319
 320         /* Lookup the orb corresponding to this status write. */
 321         spin_lock_irqsave(&card->lock, flags);
 322         list_for_each_entry(orb, &sd->orb_list, link) {
 323                 if (STATUS_GET_ORB_HIGH(status) == 0 &&
 324                     STATUS_GET_ORB_LOW(status) == orb->request_bus) {
 325                         orb->rcode = RCODE_COMPLETE;
 326                         list_del(&orb->link);
 327                         break;
 328                 }
 329         }
 330         spin_unlock_irqrestore(&card->lock, flags);
 331
 332         if (&orb->link != &sd->orb_list)
 333                 orb->callback(orb, &status);
 334         else
 335                 fw_error("status write for unknown orb\n");
 336
 337         kref_put(&orb->kref, free_orb);
 338
 339         fw_send_response(card, request, RCODE_COMPLETE);
 340 }
 341
 342 static void
 343 complete_transaction(struct fw_card *card, int rcode,
 344                      void *payload, size_t length, void *data)
 345 {
 346         struct sbp2_orb *orb = data;
 347         unsigned long flags;
 348
 349         /*
 350          * This is a little tricky.  We can get the status write for
 351          * the orb before we get this callback.  The status write
 352          * handler above will assume the orb pointer transaction was
 353          * successful and set the rcode to RCODE_COMPLETE for the orb.
 354          * So this callback only sets the rcode if it hasn't already
 355          * been set and only does the cleanup if the transaction
 356          * failed and we didn't already get a status write.
 357          */
 358         spin_lock_irqsave(&card->lock, flags);
 359
 360         if (orb->rcode == -1)
 361                 orb->rcode = rcode;
 362         if (orb->rcode != RCODE_COMPLETE) {
 363                 list_del(&orb->link);
 364                 spin_unlock_irqrestore(&card->lock, flags);
 365                 orb->callback(orb, NULL);
 366         } else {
 367                 spin_unlock_irqrestore(&card->lock, flags);
 368         }
 369
 370         kref_put(&orb->kref, free_orb);
 371 }
 372
 373 static void
 374 sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit,
 375               int node_id, int generation, u64 offset)
 376 {
 377         struct fw_device *device = fw_device(unit->device.parent);
 378         struct sbp2_device *sd = unit->device.driver_data;
 379         unsigned long flags;
 380
 381         orb->pointer.high = 0;
 382         orb->pointer.low = orb->request_bus;
 383         fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer));
 384
 385         spin_lock_irqsave(&device->card->lock, flags);
 386         list_add_tail(&orb->link, &sd->orb_list);
 387         spin_unlock_irqrestore(&device->card->lock, flags);
 388
 389         /* Take a ref for the orb list and for the transaction callback. */
 390         kref_get(&orb->kref);
 391         kref_get(&orb->kref);
 392
 393         fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
 394                         node_id, generation, device->max_speed, offset,
 395                         &orb->pointer, sizeof(orb->pointer),
 396                         complete_transaction, orb);
 397 }
 398
 399 static int sbp2_cancel_orbs(struct fw_unit *unit)
 400 {
 401         struct fw_device *device = fw_device(unit->device.parent);
 402         struct sbp2_device *sd = unit->device.driver_data;
 403         struct sbp2_orb *orb, *next;
 404         struct list_head list;
 405         unsigned long flags;
 406         int retval = -ENOENT;
 407
 408         INIT_LIST_HEAD(&list);
 409         spin_lock_irqsave(&device->card->lock, flags);
 410         list_splice_init(&sd->orb_list, &list);
 411         spin_unlock_irqrestore(&device->card->lock, flags);
 412
 413         list_for_each_entry_safe(orb, next, &list, link) {
 414                 retval = 0;
 415                 if (fw_cancel_transaction(device->card, &orb->t) == 0)
 416                         continue;
 417
 418                 orb->rcode = RCODE_CANCELLED;
 419                 orb->callback(orb, NULL);
 420         }
 421
 422         return retval;
 423 }
 424
 425 static void
 426 complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
 427 {
 428         struct sbp2_management_orb *orb =
 429                 container_of(base_orb, struct sbp2_management_orb, base);
 430
 431         if (status)
 432                 memcpy(&orb->status, status, sizeof(*status));
 433         complete(&orb->done);
 434 }
 435
 436 static int
 437 sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
 438                          int function, int lun, void *response)
 439 {
 440         struct fw_device *device = fw_device(unit->device.parent);
 441         struct sbp2_device *sd = unit->device.driver_data;
 442         struct sbp2_management_orb *orb;
 443         int retval = -ENOMEM;
 444
 445         orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
 446         if (orb == NULL)
 447                 return -ENOMEM;
 448
 449         kref_init(&orb->base.kref);
 450         orb->response_bus =
 451                 dma_map_single(device->card->device, &orb->response,
 452                                sizeof(orb->response), DMA_FROM_DEVICE);
 453         if (dma_mapping_error(orb->response_bus))
 454                 goto fail_mapping_response;
 455
 456         orb->request.response.high    = 0;
 457         orb->request.response.low     = orb->response_bus;
 458
 459         orb->request.misc =
 460                 MANAGEMENT_ORB_NOTIFY |
 461                 MANAGEMENT_ORB_FUNCTION(function) |
 462                 MANAGEMENT_ORB_LUN(lun);
 463         orb->request.length =
 464                 MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response));
 465
 466         orb->request.status_fifo.high = sd->address_handler.offset >> 32;
 467         orb->request.status_fifo.low  = sd->address_handler.offset;
 468
 469         if (function == SBP2_LOGIN_REQUEST) {
 470                 orb->request.misc |=
 471                         MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login) |
 472                         MANAGEMENT_ORB_RECONNECT(0);
 473         }
 474
 475         fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request));
 476
 477         init_completion(&orb->done);
 478         orb->base.callback = complete_management_orb;
 479
 480         orb->base.request_bus =
 481                 dma_map_single(device->card->device, &orb->request,
 482                                sizeof(orb->request), DMA_TO_DEVICE);
 483         if (dma_mapping_error(orb->base.request_bus))
 484                 goto fail_mapping_request;
 485
 486         sbp2_send_orb(&orb->base, unit,
 487                       node_id, generation, sd->management_agent_address);
 488
 489         wait_for_completion_timeout(&orb->done,
 490                                     msecs_to_jiffies(SBP2_ORB_TIMEOUT));
 491
 492         retval = -EIO;
 493         if (sbp2_cancel_orbs(unit) == 0) {
 494                 fw_error("orb reply timed out, rcode=0x%02x\n",
 495                          orb->base.rcode);
 496                 goto out;
 497         }
 498
 499         if (orb->base.rcode != RCODE_COMPLETE) {
 500                 fw_error("management write failed, rcode 0x%02x\n",
 501                          orb->base.rcode);
 502                 goto out;
 503         }
 504
 505         if (STATUS_GET_RESPONSE(orb->status) != 0 ||
 506             STATUS_GET_SBP_STATUS(orb->status) != 0) {
 507                 fw_error("error status: %d:%d\n",
 508                          STATUS_GET_RESPONSE(orb->status),
 509                          STATUS_GET_SBP_STATUS(orb->status));
 510                 goto out;
 511         }
 512
 513         retval = 0;
 514  out:
 515         dma_unmap_single(device->card->device, orb->base.request_bus,
 516                          sizeof(orb->request), DMA_TO_DEVICE);
 517  fail_mapping_request:
 518         dma_unmap_single(device->card->device, orb->response_bus,
 519                          sizeof(orb->response), DMA_FROM_DEVICE);
 520  fail_mapping_response:
 521         if (response)
 522                 fw_memcpy_from_be32(response,
 523                                     orb->response, sizeof(orb->response));
 524         kref_put(&orb->base.kref, free_orb);
 525
 526         return retval;
 527 }
 528
 529 static void
 530 complete_agent_reset_write(struct fw_card *card, int rcode,
 531                            void *payload, size_t length, void *data)
 532 {
 533         struct fw_transaction *t = data;
 534
 535         kfree(t);
 536 }
 537
 538 static int sbp2_agent_reset(struct fw_unit *unit)
 539 {
 540         struct fw_device *device = fw_device(unit->device.parent);
 541         struct sbp2_device *sd = unit->device.driver_data;
 542         struct fw_transaction *t;
 543         static u32 zero;
 544
 545         t = kzalloc(sizeof(*t), GFP_ATOMIC);
 546         if (t == NULL)
 547                 return -ENOMEM;
 548
 549         fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
 550                         sd->node_id, sd->generation, device->max_speed,
 551                         sd->command_block_agent_address + SBP2_AGENT_RESET,
 552                         &zero, sizeof(zero), complete_agent_reset_write, t);
 553
 554         return 0;
 555 }
 556
 557 static void sbp2_reconnect(struct work_struct *work);
 558 static struct scsi_host_template scsi_driver_template;
 559
 560 static void release_sbp2_device(struct kref *kref)
 561 {
 562         struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref);
 563         struct Scsi_Host *host =
 564                 container_of((void *)sd, struct Scsi_Host, hostdata[0]);
 565
 566         scsi_remove_host(host);
 567         sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation,
 568                                  SBP2_LOGOUT_REQUEST, sd->login_id, NULL);
 569         fw_core_remove_address_handler(&sd->address_handler);
 570         fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id);
 571         put_device(&sd->unit->device);
 572         scsi_host_put(host);
 573 }
 574
 575 static void sbp2_login(struct work_struct *work)
 576 {
 577         struct sbp2_device *sd =
 578                 container_of(work, struct sbp2_device, work.work);
 579         struct Scsi_Host *host =
 580                 container_of((void *)sd, struct Scsi_Host, hostdata[0]);
 581         struct fw_unit *unit = sd->unit;
 582         struct fw_device *device = fw_device(unit->device.parent);
 583         struct sbp2_login_response response;
 584         int generation, node_id, local_node_id, lun, retval;
 585
 586         /* FIXME: Make this work for multi-lun devices. */
 587         lun = 0;
 588
 589         generation    = device->card->generation;
 590         node_id       = device->node->node_id;
 591         local_node_id = device->card->local_node->node_id;
 592
 593         if (sbp2_send_management_orb(unit, node_id, generation,
 594                                      SBP2_LOGIN_REQUEST, lun, &response) < 0) {
 595                 if (sd->retries++ < 5) {
 596                         schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5));
 597                 } else {
 598                         fw_error("failed to login to %s\n",
 599                                  unit->device.bus_id);
 600                         kref_put(&sd->kref, release_sbp2_device);
 601                 }
 602                 return;
 603         }
 604
 605         sd->generation   = generation;
 606         sd->node_id      = node_id;
 607         sd->address_high = local_node_id << 16;
 608
 609         /* Get command block agent offset and login id. */
 610         sd->command_block_agent_address =
 611                 ((u64) (response.command_block_agent.high & 0xffff) << 32) |
 612                 response.command_block_agent.low;
 613         sd->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response);
 614
 615         fw_notify("logged in to sbp2 unit %s (%d retries)\n",
 616                   unit->device.bus_id, sd->retries);
 617         fw_notify(" - management_agent_address:    0x%012llx\n",
 618                   (unsigned long long) sd->management_agent_address);
 619         fw_notify(" - command_block_agent_address: 0x%012llx\n",
 620                   (unsigned long long) sd->command_block_agent_address);
 621         fw_notify(" - status write address:        0x%012llx\n",
 622                   (unsigned long long) sd->address_handler.offset);
 623
 624 #if 0
 625         /* FIXME: The linux1394 sbp2 does this last step. */
 626         sbp2_set_busy_timeout(scsi_id);
 627 #endif
 628
 629         PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect);
 630         sbp2_agent_reset(unit);
 631
 632         /* FIXME: Loop over luns here. */
 633         lun = 0;
 634         retval = scsi_add_device(host, 0, 0, lun);
 635         if (retval < 0) {
 636                 sbp2_send_management_orb(unit, sd->node_id, sd->generation,
 637                                          SBP2_LOGOUT_REQUEST, sd->login_id,
 638                                          NULL);
 639                 /*
 640                  * Set this back to sbp2_login so we fall back and
 641                  * retry login on bus reset.
 642                  */
 643                 PREPARE_DELAYED_WORK(&sd->work, sbp2_login);
 644         }
 645         kref_put(&sd->kref, release_sbp2_device);
 646 }
 647
 648 static int sbp2_probe(struct device *dev)
 649 {
 650         struct fw_unit *unit = fw_unit(dev);
 651         struct fw_device *device = fw_device(unit->device.parent);
 652         struct sbp2_device *sd;
 653         struct fw_csr_iterator ci;
 654         struct Scsi_Host *host;
 655         int i, key, value, err;
 656         u32 model, firmware_revision;
 657
 658         err = -ENOMEM;
 659         host = scsi_host_alloc(&scsi_driver_template, sizeof(*sd));
 660         if (host == NULL)
 661                 goto fail;
 662
 663         sd = (struct sbp2_device *) host->hostdata;
 664         unit->device.driver_data = sd;
 665         sd->unit = unit;
 666         INIT_LIST_HEAD(&sd->orb_list);
 667         kref_init(&sd->kref);
 668
 669         sd->address_handler.length = 0x100;
 670         sd->address_handler.address_callback = sbp2_status_write;
 671         sd->address_handler.callback_data = sd;
 672
 673         err = fw_core_add_address_handler(&sd->address_handler,
 674                                           &fw_high_memory_region);
 675         if (err < 0)
 676                 goto fail_host;
 677
 678         err = fw_device_enable_phys_dma(device);
 679         if (err < 0)
 680                 goto fail_address_handler;
 681
 682         err = scsi_add_host(host, &unit->device);
 683         if (err < 0)
 684                 goto fail_address_handler;
 685
 686         /*
 687          * Scan unit directory to get management agent address,
 688          * firmware revison and model.  Initialize firmware_revision
 689          * and model to values that wont match anything in our table.
 690          */
 691         firmware_revision = 0xff000000;
 692         model = 0xff000000;
 693         fw_csr_iterator_init(&ci, unit->directory);
 694         while (fw_csr_iterator_next(&ci, &key, &value)) {
 695                 switch (key) {
 696                 case CSR_DEPENDENT_INFO | CSR_OFFSET:
 697                         sd->management_agent_address =
 698                                 0xfffff0000000ULL + 4 * value;
 699                         break;
 700                 case SBP2_FIRMWARE_REVISION:
 701                         firmware_revision = value;
 702                         break;
 703                 case CSR_MODEL:
 704                         model = value;
 705                         break;
 706                 }
 707         }
 708
 709         for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
 710                 if (sbp2_workarounds_table[i].firmware_revision !=
 711                     (firmware_revision & 0xffffff00))
 712                         continue;
 713                 if (sbp2_workarounds_table[i].model != model &&
 714                     sbp2_workarounds_table[i].model != ~0)
 715                         continue;
 716                 sd->workarounds |= sbp2_workarounds_table[i].workarounds;
 717                 break;
 718         }
 719
 720         if (sd->workarounds)
 721                 fw_notify("Workarounds for node %s: 0x%x "
 722                           "(firmware_revision 0x%06x, model_id 0x%06x)\n",
 723                           unit->device.bus_id,
 724                           sd->workarounds, firmware_revision, model);
 725
 726         get_device(&unit->device);
 727
 728         /*
 729          * We schedule work to do the login so we can easily
 730          * reschedule retries. Always get the ref before scheduling
 731          * work.
 732          */
 733         INIT_DELAYED_WORK(&sd->work, sbp2_login);
 734         if (schedule_delayed_work(&sd->work, 0))
 735                 kref_get(&sd->kref);
 736
 737         return 0;
 738
 739  fail_address_handler:
 740         fw_core_remove_address_handler(&sd->address_handler);
 741  fail_host:
 742         scsi_host_put(host);
 743  fail:
 744         return err;
 745 }
 746
 747 static int sbp2_remove(struct device *dev)
 748 {
 749         struct fw_unit *unit = fw_unit(dev);
 750         struct sbp2_device *sd = unit->device.driver_data;
 751
 752         kref_put(&sd->kref, release_sbp2_device);
 753
 754         return 0;
 755 }
 756
 757 static void sbp2_reconnect(struct work_struct *work)
 758 {
 759         struct sbp2_device *sd =
 760                 container_of(work, struct sbp2_device, work.work);
 761         struct fw_unit *unit = sd->unit;
 762         struct fw_device *device = fw_device(unit->device.parent);
 763         int generation, node_id, local_node_id;
 764
 765         generation    = device->card->generation;
 766         node_id       = device->node->node_id;
 767         local_node_id = device->card->local_node->node_id;
 768
 769         if (sbp2_send_management_orb(unit, node_id, generation,
 770                                      SBP2_RECONNECT_REQUEST,
 771                                      sd->login_id, NULL) < 0) {
 772                 if (sd->retries++ >= 5) {
 773                         fw_error("failed to reconnect to %s\n",
 774                                  unit->device.bus_id);
 775                         /* Fall back and try to log in again. */
 776                         sd->retries = 0;
 777                         PREPARE_DELAYED_WORK(&sd->work, sbp2_login);
 778                 }
 779                 schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5));
 780                 return;
 781         }
 782
 783         sd->generation   = generation;
 784         sd->node_id      = node_id;
 785         sd->address_high = local_node_id << 16;
 786
 787         fw_notify("reconnected to unit %s (%d retries)\n",
 788                   unit->device.bus_id, sd->retries);
 789         sbp2_agent_reset(unit);
 790         sbp2_cancel_orbs(unit);
 791         kref_put(&sd->kref, release_sbp2_device);
 792 }
 793
 794 static void sbp2_update(struct fw_unit *unit)
 795 {
 796         struct fw_device *device = fw_device(unit->device.parent);
 797         struct sbp2_device *sd = unit->device.driver_data;
 798
 799         sd->retries = 0;
 800         fw_device_enable_phys_dma(device);
 801         if (schedule_delayed_work(&sd->work, 0))
 802                 kref_get(&sd->kref);
 803 }
 804
 805 #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
 806 #define SBP2_SW_VERSION_ENTRY   0x00010483
 807
 808 static const struct fw_device_id sbp2_id_table[] = {
 809         {
 810                 .match_flags  = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION,
 811                 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY,
 812                 .version      = SBP2_SW_VERSION_ENTRY,
 813         },
 814         { }
 815 };
 816
 817 static struct fw_driver sbp2_driver = {
 818         .driver   = {
 819                 .owner  = THIS_MODULE,
 820                 .name   = sbp2_driver_name,
 821                 .bus    = &fw_bus_type,
 822                 .probe  = sbp2_probe,
 823                 .remove = sbp2_remove,
 824         },
 825         .update   = sbp2_update,
 826         .id_table = sbp2_id_table,
 827 };
 828
 829 static unsigned int
 830 sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
 831 {
 832         int sam_status;
 833
 834         sense_data[0] = 0x70;
 835         sense_data[1] = 0x0;
 836         sense_data[2] = sbp2_status[1];
 837         sense_data[3] = sbp2_status[4];
 838         sense_data[4] = sbp2_status[5];
 839         sense_data[5] = sbp2_status[6];
 840         sense_data[6] = sbp2_status[7];
 841         sense_data[7] = 10;
 842         sense_data[8] = sbp2_status[8];
 843         sense_data[9] = sbp2_status[9];
 844         sense_data[10] = sbp2_status[10];
 845         sense_data[11] = sbp2_status[11];
 846         sense_data[12] = sbp2_status[2];
 847         sense_data[13] = sbp2_status[3];
 848         sense_data[14] = sbp2_status[12];
 849         sense_data[15] = sbp2_status[13];
 850
 851         sam_status = sbp2_status[0] & 0x3f;
 852
 853         switch (sam_status) {
 854         case SAM_STAT_GOOD:
 855         case SAM_STAT_CHECK_CONDITION:
 856         case SAM_STAT_CONDITION_MET:
 857         case SAM_STAT_BUSY:
 858         case SAM_STAT_RESERVATION_CONFLICT:
 859         case SAM_STAT_COMMAND_TERMINATED:
 860                 return DID_OK << 16 | sam_status;
 861
 862         default:
 863                 return DID_ERROR << 16;
 864         }
 865 }
 866
 867 static void
 868 complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
 869 {
 870         struct sbp2_command_orb *orb =
 871                 container_of(base_orb, struct sbp2_command_orb, base);
 872         struct fw_unit *unit = orb->unit;
 873         struct fw_device *device = fw_device(unit->device.parent);
 874         int result;
 875
 876         if (status != NULL) {
 877                 if (STATUS_GET_DEAD(*status))
 878                         sbp2_agent_reset(unit);
 879
 880                 switch (STATUS_GET_RESPONSE(*status)) {
 881                 case SBP2_STATUS_REQUEST_COMPLETE:
 882                         result = DID_OK << 16;
 883                         break;
 884                 case SBP2_STATUS_TRANSPORT_FAILURE:
 885                         result = DID_BUS_BUSY << 16;
 886                         break;
 887                 case SBP2_STATUS_ILLEGAL_REQUEST:
 888                 case SBP2_STATUS_VENDOR_DEPENDENT:
 889                 default:
 890                         result = DID_ERROR << 16;
 891                         break;
 892                 }
 893
 894                 if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1)
 895                         result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status),
 896                                                            orb->cmd->sense_buffer);
 897         } else {
 898                 /*
 899                  * If the orb completes with status == NULL, something
 900                  * went wrong, typically a bus reset happened mid-orb
 901                  * or when sending the write (less likely).
 902                  */
 903                 result = DID_BUS_BUSY << 16;
 904         }
 905
 906         dma_unmap_single(device->card->device, orb->base.request_bus,
 907                          sizeof(orb->request), DMA_TO_DEVICE);
 908
 909         if (scsi_sg_count(orb->cmd) > 0)
 910                 dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
 911                              scsi_sg_count(orb->cmd),
 912                              orb->cmd->sc_data_direction);
 913
 914         if (orb->page_table_bus != 0)
 915                 dma_unmap_single(device->card->device, orb->page_table_bus,
 916                                  sizeof(orb->page_table), DMA_TO_DEVICE);
 917
 918         orb->cmd->result = result;
 919         orb->done(orb->cmd);
 920 }
 921
 922 static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
 923 {
 924         struct sbp2_device *sd =
 925                 (struct sbp2_device *)orb->cmd->device->host->hostdata;
 926         struct fw_unit *unit = sd->unit;
 927         struct fw_device *device = fw_device(unit->device.parent);
 928         struct scatterlist *sg;
 929         int sg_len, l, i, j, count;
 930         dma_addr_t sg_addr;
 931
 932         sg = scsi_sglist(orb->cmd);
 933         count = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
 934                            orb->cmd->sc_data_direction);
 935         if (count == 0)
 936                 goto fail;
 937
 938         /*
 939          * Handle the special case where there is only one element in
 940          * the scatter list by converting it to an immediate block
 941          * request. This is also a workaround for broken devices such
 942          * as the second generation iPod which doesn't support page
 943          * tables.
 944          */
 945         if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) {
 946                 orb->request.data_descriptor.high = sd->address_high;
 947                 orb->request.data_descriptor.low  = sg_dma_address(sg);
 948                 orb->request.misc |=
 949                         COMMAND_ORB_DATA_SIZE(sg_dma_len(sg));
 950                 return 0;
 951         }
 952
 953         /*
 954          * Convert the scatterlist to an sbp2 page table.  If any
 955          * scatterlist entries are too big for sbp2, we split them as we
 956          * go.  Even if we ask the block I/O layer to not give us sg
 957          * elements larger than 65535 bytes, some IOMMUs may merge sg elements
 958          * during DMA mapping, and Linux currently doesn't prevent this.
 959          */
 960         for (i = 0, j = 0; i < count; i++) {
 961                 sg_len = sg_dma_len(sg + i);
 962                 sg_addr = sg_dma_address(sg + i);
 963                 while (sg_len) {
 964                         /* FIXME: This won't get us out of the pinch. */
 965                         if (unlikely(j >= ARRAY_SIZE(orb->page_table))) {
 966                                 fw_error("page table overflow\n");
 967                                 goto fail_page_table;
 968                         }
 969                         l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH);
 970                         orb->page_table[j].low = sg_addr;
 971                         orb->page_table[j].high = (l << 16);
 972                         sg_addr += l;
 973                         sg_len -= l;
 974                         j++;
 975                 }
 976         }
 977
 978         fw_memcpy_to_be32(orb->page_table, orb->page_table,
 979                           sizeof(orb->page_table[0]) * j);
 980         orb->page_table_bus =
 981                 dma_map_single(device->card->device, orb->page_table,
 982                                sizeof(orb->page_table), DMA_TO_DEVICE);
 983         if (dma_mapping_error(orb->page_table_bus))
 984                 goto fail_page_table;
 985
 986         /*
 987          * The data_descriptor pointer is the one case where we need
 988          * to fill in the node ID part of the address.  All other
 989          * pointers assume that the data referenced reside on the
 990          * initiator (i.e. us), but data_descriptor can refer to data
 991          * on other nodes so we need to put our ID in descriptor.high.
 992          */
 993         orb->request.data_descriptor.high = sd->address_high;
 994         orb->request.data_descriptor.low  = orb->page_table_bus;
 995         orb->request.misc |=
 996                 COMMAND_ORB_PAGE_TABLE_PRESENT |
 997                 COMMAND_ORB_DATA_SIZE(j);
 998
 999         return 0;
1000
1001  fail_page_table:
1002         dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
1003                      orb->cmd->sc_data_direction);
1004  fail:
1005         return -ENOMEM;
1006 }
1007
1008 /* SCSI stack integration */
1009
1010 static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
1011 {
1012         struct sbp2_device *sd =
1013                 (struct sbp2_device *)cmd->device->host->hostdata;
1014         struct fw_unit *unit = sd->unit;
1015         struct fw_device *device = fw_device(unit->device.parent);
1016         struct sbp2_command_orb *orb;
1017         unsigned max_payload;
1018
1019         /*
1020          * Bidirectional commands are not yet implemented, and unknown
1021          * transfer direction not handled.
1022          */
1023         if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
1024                 fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n");
1025                 cmd->result = DID_ERROR << 16;
1026                 done(cmd);
1027                 return 0;
1028         }
1029
1030         orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
1031         if (orb == NULL) {
1032                 fw_notify("failed to alloc orb\n");
1033                 goto fail_alloc;
1034         }
1035
1036         /* Initialize rcode to something not RCODE_COMPLETE. */
1037         orb->base.rcode = -1;
1038         kref_init(&orb->base.kref);
1039
1040         orb->unit = unit;
1041         orb->done = done;
1042         orb->cmd  = cmd;
1043
1044         orb->request.next.high   = SBP2_ORB_NULL;
1045         orb->request.next.low    = 0x0;
1046         /*
1047          * At speed 100 we can do 512 bytes per packet, at speed 200,
1048          * 1024 bytes per packet etc.  The SBP-2 max_payload field
1049          * specifies the max payload size as 2 ^ (max_payload + 2), so
1050          * if we set this to max_speed + 7, we get the right value.
1051          */
1052         max_payload = min(device->max_speed + 7,
1053                           device->card->max_receive - 1);
1054         orb->request.misc =
1055                 COMMAND_ORB_MAX_PAYLOAD(max_payload) |
1056                 COMMAND_ORB_SPEED(device->max_speed) |
1057                 COMMAND_ORB_NOTIFY;
1058
1059         if (cmd->sc_data_direction == DMA_FROM_DEVICE)
1060                 orb->request.misc |=
1061                         COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA);
1062         else if (cmd->sc_data_direction == DMA_TO_DEVICE)
1063                 orb->request.misc |=
1064                         COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA);
1065
1066         if (scsi_sg_count(cmd) && sbp2_command_orb_map_scatterlist(orb) < 0)
1067                 goto fail_mapping;
1068
1069         fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request));
1070
1071         memset(orb->request.command_block,
1072                0, sizeof(orb->request.command_block));
1073         memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
1074
1075         orb->base.callback = complete_command_orb;
1076         orb->base.request_bus =
1077                 dma_map_single(device->card->device, &orb->request,
1078                                sizeof(orb->request), DMA_TO_DEVICE);
1079         if (dma_mapping_error(orb->base.request_bus))
1080                 goto fail_mapping;
1081
1082         sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation,
1083                       sd->command_block_agent_address + SBP2_ORB_POINTER);
1084
1085         kref_put(&orb->base.kref, free_orb);
1086         return 0;
1087
1088  fail_mapping:
1089         kref_put(&orb->base.kref, free_orb);
1090  fail_alloc:
1091         return SCSI_MLQUEUE_HOST_BUSY;
1092 }
1093
1094 static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
1095 {
1096         struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata;
1097
1098         sdev->allow_restart = 1;
1099
1100         if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36)
1101                 sdev->inquiry_len = 36;
1102         return 0;
1103 }
1104
1105 static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
1106 {
1107         struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata;
1108         struct fw_unit *unit = sd->unit;
1109
1110         sdev->use_10_for_rw = 1;
1111
1112         if (sdev->type == TYPE_ROM)
1113                 sdev->use_10_for_ms = 1;
1114         if (sdev->type == TYPE_DISK &&
1115             sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
1116                 sdev->skip_ms_page_8 = 1;
1117         if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) {
1118                 fw_notify("setting fix_capacity for %s\n", unit->device.bus_id);
1119                 sdev->fix_capacity = 1;
1120         }
1121         if (sd->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
1122                 blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
1123         return 0;
1124 }
1125
1126 /*
1127  * Called by scsi stack when something has really gone wrong.  Usually
1128  * called when a command has timed-out for some reason.
1129  */
1130 static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
1131 {
1132         struct sbp2_device *sd =
1133                 (struct sbp2_device *)cmd->device->host->hostdata;
1134         struct fw_unit *unit = sd->unit;
1135
1136         fw_notify("sbp2_scsi_abort\n");
1137         sbp2_agent_reset(unit);
1138         sbp2_cancel_orbs(unit);
1139
1140         return SUCCESS;
1141 }
1142
1143 /*
1144  * Format of /sys/bus/scsi/devices/.../ieee1394_id:
1145  * u64 EUI-64 : u24 directory_ID : u16 LUN  (all printed in hexadecimal)
1146  *
1147  * This is the concatenation of target port identifier and logical unit
1148  * identifier as per SAM-2...SAM-4 annex A.
1149  */
1150 static ssize_t
1151 sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr,
1152                             char *buf)
1153 {
1154         struct scsi_device *sdev = to_scsi_device(dev);
1155         struct sbp2_device *sd;
1156         struct fw_unit *unit;
1157         struct fw_device *device;
1158         u32 directory_id;
1159         struct fw_csr_iterator ci;
1160         int key, value, lun;
1161
1162         if (!sdev)
1163                 return 0;
1164         sd = (struct sbp2_device *)sdev->host->hostdata;
1165         unit = sd->unit;
1166         device = fw_device(unit->device.parent);
1167
1168         /* implicit directory ID */
1169         directory_id = ((unit->directory - device->config_rom) * 4
1170                         + CSR_CONFIG_ROM) & 0xffffff;
1171
1172         /* explicit directory ID, overrides implicit ID if present */
1173         fw_csr_iterator_init(&ci, unit->directory);
1174         while (fw_csr_iterator_next(&ci, &key, &value))
1175                 if (key == CSR_DIRECTORY_ID) {
1176                         directory_id = value;
1177                         break;
1178                 }
1179
1180         /* FIXME: Make this work for multi-lun devices. */
1181         lun = 0;
1182
1183         return sprintf(buf, "%08x%08x:%06x:%04x\n",
1184                         device->config_rom[3], device->config_rom[4],
1185                         directory_id, lun);
1186 }
1187
1188 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
1189
1190 static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
1191         &dev_attr_ieee1394_id,
1192         NULL
1193 };
1194
1195 static struct scsi_host_template scsi_driver_template = {
1196         .module                 = THIS_MODULE,
1197         .name                   = "SBP-2 IEEE-1394",
1198         .proc_name              = sbp2_driver_name,
1199         .queuecommand           = sbp2_scsi_queuecommand,
1200         .slave_alloc            = sbp2_scsi_slave_alloc,
1201         .slave_configure        = sbp2_scsi_slave_configure,
1202         .eh_abort_handler       = sbp2_scsi_abort,
1203         .this_id                = -1,
1204         .sg_tablesize           = SG_ALL,
1205         .use_clustering         = ENABLE_CLUSTERING,
1206         .cmd_per_lun            = 1,
1207         .can_queue              = 1,
1208         .sdev_attrs             = sbp2_scsi_sysfs_attrs,
1209 };
1210
1211 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
1212 MODULE_DESCRIPTION("SCSI over IEEE1394");
1213 MODULE_LICENSE("GPL");
1214 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
1215
1216 /* Provide a module alias so root-on-sbp2 initrds don't break. */
1217 #ifndef CONFIG_IEEE1394_SBP2_MODULE
1218 MODULE_ALIAS("sbp2");
1219 #endif
1220
1221 static int __init sbp2_init(void)
1222 {
1223         return driver_register(&sbp2_driver.driver);
1224 }
1225
1226 static void __exit sbp2_cleanup(void)
1227 {
1228         driver_unregister(&sbp2_driver.driver);
1229 }
1230
1231 module_init(sbp2_init);
1232 module_exit(sbp2_cleanup);