drivers/scsi/ses.c

   1 /*
   2  * SCSI Enclosure Services
   3  *
   4  * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
   5  *
   6 **-----------------------------------------------------------------------------
   7 **
   8 **  This program is free software; you can redistribute it and/or
   9 **  modify it under the terms of the GNU General Public License
  10 **  version 2 as published by the Free Software Foundation.
  11 **
  12 **  This program is distributed in the hope that it will be useful,
  13 **  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 **  GNU General Public License for more details.
  16 **
  17 **  You should have received a copy of the GNU General Public License
  18 **  along with this program; if not, write to the Free Software
  19 **  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 **
  21 **-----------------------------------------------------------------------------
  22 */
  23
  24 #include <linux/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/enclosure.h>
  27
  28 #include <scsi/scsi.h>
  29 #include <scsi/scsi_cmnd.h>
  30 #include <scsi/scsi_dbg.h>
  31 #include <scsi/scsi_device.h>
  32 #include <scsi/scsi_driver.h>
  33 #include <scsi/scsi_host.h>
  34
  35 struct ses_device {
  36         unsigned char *page1;
  37         unsigned char *page2;
  38         unsigned char *page10;
  39         short page1_len;
  40         short page2_len;
  41         short page10_len;
  42 };
  43
  44 struct ses_component {
  45         u64 addr;
  46         unsigned char *desc;
  47 };
  48
  49 static int ses_probe(struct device *dev)
  50 {
  51         struct scsi_device *sdev = to_scsi_device(dev);
  52         int err = -ENODEV;
  53
  54         if (sdev->type != TYPE_ENCLOSURE)
  55                 goto out;
  56
  57         err = 0;
  58         sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n");
  59
  60  out:
  61         return err;
  62 }
  63
  64 #define SES_TIMEOUT (30 * HZ)
  65 #define SES_RETRIES 3
  66
  67 static int ses_recv_diag(struct scsi_device *sdev, int page_code,
  68                          void *buf, int bufflen)
  69 {
  70         unsigned char cmd[] = {
  71                 RECEIVE_DIAGNOSTIC,
  72                 1,              /* Set PCV bit */
  73                 page_code,
  74                 bufflen >> 8,
  75                 bufflen & 0xff,
  76                 0
  77         };
  78
  79         return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
  80                                 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
  81 }
  82
  83 static int ses_send_diag(struct scsi_device *sdev, int page_code,
  84                          void *buf, int bufflen)
  85 {
  86         u32 result;
  87
  88         unsigned char cmd[] = {
  89                 SEND_DIAGNOSTIC,
  90                 0x10,           /* Set PF bit */
  91                 0,
  92                 bufflen >> 8,
  93                 bufflen & 0xff,
  94                 0
  95         };
  96
  97         result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
  98                                   NULL, SES_TIMEOUT, SES_RETRIES, NULL);
  99         if (result)
 100                 sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
 101                             result);
 102         return result;
 103 }
 104
 105 static int ses_set_page2_descriptor(struct enclosure_device *edev,
 106                                       struct enclosure_component *ecomp,
 107                                       unsigned char *desc)
 108 {
 109         int i, j, count = 0, descriptor = ecomp->number;
 110         struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
 111         struct ses_device *ses_dev = edev->scratch;
 112         unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
 113         unsigned char *desc_ptr = ses_dev->page2 + 8;
 114
 115         /* Clear everything */
 116         memset(desc_ptr, 0, ses_dev->page2_len - 8);
 117         for (i = 0; i < ses_dev->page1[10]; i++, type_ptr += 4) {
 118                 for (j = 0; j < type_ptr[1]; j++) {
 119                         desc_ptr += 4;
 120                         if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
 121                             type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 122                                 continue;
 123                         if (count++ == descriptor) {
 124                                 memcpy(desc_ptr, desc, 4);
 125                                 /* set select */
 126                                 desc_ptr[0] |= 0x80;
 127                                 /* clear reserved, just in case */
 128                                 desc_ptr[0] &= 0xf0;
 129                         }
 130                 }
 131         }
 132
 133         return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
 134 }
 135
 136 static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
 137                                       struct enclosure_component *ecomp)
 138 {
 139         int i, j, count = 0, descriptor = ecomp->number;
 140         struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
 141         struct ses_device *ses_dev = edev->scratch;
 142         unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
 143         unsigned char *desc_ptr = ses_dev->page2 + 8;
 144
 145         ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
 146
 147         for (i = 0; i < ses_dev->page1[10]; i++, type_ptr += 4) {
 148                 for (j = 0; j < type_ptr[1]; j++) {
 149                         desc_ptr += 4;
 150                         if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
 151                             type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 152                                 continue;
 153                         if (count++ == descriptor)
 154                                 return desc_ptr;
 155                 }
 156         }
 157         return NULL;
 158 }
 159
 160 static void ses_get_fault(struct enclosure_device *edev,
 161                           struct enclosure_component *ecomp)
 162 {
 163         unsigned char *desc;
 164
 165         desc = ses_get_page2_descriptor(edev, ecomp);
 166         if (desc)
 167                 ecomp->fault = (desc[3] & 0x60) >> 4;
 168 }
 169
 170 static int ses_set_fault(struct enclosure_device *edev,
 171                           struct enclosure_component *ecomp,
 172                          enum enclosure_component_setting val)
 173 {
 174         unsigned char desc[4] = {0 };
 175
 176         switch (val) {
 177         case ENCLOSURE_SETTING_DISABLED:
 178                 /* zero is disabled */
 179                 break;
 180         case ENCLOSURE_SETTING_ENABLED:
 181                 desc[2] = 0x02;
 182                 break;
 183         default:
 184                 /* SES doesn't do the SGPIO blink settings */
 185                 return -EINVAL;
 186         }
 187
 188         return ses_set_page2_descriptor(edev, ecomp, desc);
 189 }
 190
 191 static void ses_get_status(struct enclosure_device *edev,
 192                            struct enclosure_component *ecomp)
 193 {
 194         unsigned char *desc;
 195
 196         desc = ses_get_page2_descriptor(edev, ecomp);
 197         if (desc)
 198                 ecomp->status = (desc[0] & 0x0f);
 199 }
 200
 201 static void ses_get_locate(struct enclosure_device *edev,
 202                            struct enclosure_component *ecomp)
 203 {
 204         unsigned char *desc;
 205
 206         desc = ses_get_page2_descriptor(edev, ecomp);
 207         if (desc)
 208                 ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
 209 }
 210
 211 static int ses_set_locate(struct enclosure_device *edev,
 212                           struct enclosure_component *ecomp,
 213                           enum enclosure_component_setting val)
 214 {
 215         unsigned char desc[4] = {0 };
 216
 217         switch (val) {
 218         case ENCLOSURE_SETTING_DISABLED:
 219                 /* zero is disabled */
 220                 break;
 221         case ENCLOSURE_SETTING_ENABLED:
 222                 desc[2] = 0x02;
 223                 break;
 224         default:
 225                 /* SES doesn't do the SGPIO blink settings */
 226                 return -EINVAL;
 227         }
 228         return ses_set_page2_descriptor(edev, ecomp, desc);
 229 }
 230
 231 static int ses_set_active(struct enclosure_device *edev,
 232                           struct enclosure_component *ecomp,
 233                           enum enclosure_component_setting val)
 234 {
 235         unsigned char desc[4] = {0 };
 236
 237         switch (val) {
 238         case ENCLOSURE_SETTING_DISABLED:
 239                 /* zero is disabled */
 240                 ecomp->active = 0;
 241                 break;
 242         case ENCLOSURE_SETTING_ENABLED:
 243                 desc[2] = 0x80;
 244                 ecomp->active = 1;
 245                 break;
 246         default:
 247                 /* SES doesn't do the SGPIO blink settings */
 248                 return -EINVAL;
 249         }
 250         return ses_set_page2_descriptor(edev, ecomp, desc);
 251 }
 252
 253 static struct enclosure_component_callbacks ses_enclosure_callbacks = {
 254         .get_fault              = ses_get_fault,
 255         .set_fault              = ses_set_fault,
 256         .get_status             = ses_get_status,
 257         .get_locate             = ses_get_locate,
 258         .set_locate             = ses_set_locate,
 259         .set_active             = ses_set_active,
 260 };
 261
 262 struct ses_host_edev {
 263         struct Scsi_Host *shost;
 264         struct enclosure_device *edev;
 265 };
 266
 267 #if 0
 268 int ses_match_host(struct enclosure_device *edev, void *data)
 269 {
 270         struct ses_host_edev *sed = data;
 271         struct scsi_device *sdev;
 272
 273         if (!scsi_is_sdev_device(edev->edev.parent))
 274                 return 0;
 275
 276         sdev = to_scsi_device(edev->edev.parent);
 277
 278         if (sdev->host != sed->shost)
 279                 return 0;
 280
 281         sed->edev = edev;
 282         return 1;
 283 }
 284 #endif  /*  0  */
 285
 286 static void ses_process_descriptor(struct enclosure_component *ecomp,
 287                                    unsigned char *desc)
 288 {
 289         int eip = desc[0] & 0x10;
 290         int invalid = desc[0] & 0x80;
 291         enum scsi_protocol proto = desc[0] & 0x0f;
 292         u64 addr = 0;
 293         struct ses_component *scomp = ecomp->scratch;
 294         unsigned char *d;
 295
 296         scomp->desc = desc;
 297
 298         if (invalid)
 299                 return;
 300
 301         switch (proto) {
 302         case SCSI_PROTOCOL_SAS:
 303                 if (eip)
 304                         d = desc + 8;
 305                 else
 306                         d = desc + 4;
 307                 /* only take the phy0 addr */
 308                 addr = (u64)d[12] << 56 |
 309                         (u64)d[13] << 48 |
 310                         (u64)d[14] << 40 |
 311                         (u64)d[15] << 32 |
 312                         (u64)d[16] << 24 |
 313                         (u64)d[17] << 16 |
 314                         (u64)d[18] << 8 |
 315                         (u64)d[19];
 316                 break;
 317         default:
 318                 /* FIXME: Need to add more protocols than just SAS */
 319                 break;
 320         }
 321         scomp->addr = addr;
 322 }
 323
 324 struct efd {
 325         u64 addr;
 326         struct device *dev;
 327 };
 328
 329 static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
 330                                       void *data)
 331 {
 332         struct efd *efd = data;
 333         int i;
 334         struct ses_component *scomp;
 335
 336         if (!edev->component[0].scratch)
 337                 return 0;
 338
 339         for (i = 0; i < edev->components; i++) {
 340                 scomp = edev->component[i].scratch;
 341                 if (scomp->addr != efd->addr)
 342                         continue;
 343
 344                 enclosure_add_device(edev, i, efd->dev);
 345                 return 1;
 346         }
 347         return 0;
 348 }
 349
 350 #define INIT_ALLOC_SIZE 32
 351
 352 static void ses_enclosure_data_process(struct enclosure_device *edev,
 353                                        struct scsi_device *sdev,
 354                                        int create)
 355 {
 356         u32 result;
 357         unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
 358         int i, j, page7_len, len, components;
 359         struct ses_device *ses_dev = edev->scratch;
 360         int types = ses_dev->page1[10];
 361         unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 362
 363         if (!hdr_buf)
 364                 goto simple_populate;
 365
 366         /* re-read page 10 */
 367         if (ses_dev->page10)
 368                 ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
 369         /* Page 7 for the descriptors is optional */
 370         result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
 371         if (result)
 372                 goto simple_populate;
 373
 374         page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 375         /* add 1 for trailing '\0' we'll use */
 376         buf = kzalloc(len + 1, GFP_KERNEL);
 377         if (!buf)
 378                 goto simple_populate;
 379         result = ses_recv_diag(sdev, 7, buf, len);
 380         if (result) {
 381  simple_populate:
 382                 kfree(buf);
 383                 buf = NULL;
 384                 desc_ptr = NULL;
 385                 len = 0;
 386                 page7_len = 0;
 387         } else {
 388                 desc_ptr = buf + 8;
 389                 len = (desc_ptr[2] << 8) + desc_ptr[3];
 390                 /* skip past overall descriptor */
 391                 desc_ptr += len + 4;
 392                 if (ses_dev->page10)
 393                         addl_desc_ptr = ses_dev->page10 + 8;
 394         }
 395         type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
 396         components = 0;
 397         for (i = 0; i < types; i++, type_ptr += 4) {
 398                 for (j = 0; j < type_ptr[1]; j++) {
 399                         char *name = NULL;
 400                         struct enclosure_component *ecomp;
 401
 402                         if (desc_ptr) {
 403                                 if (desc_ptr >= buf + page7_len) {
 404                                         desc_ptr = NULL;
 405                                 } else {
 406                                         len = (desc_ptr[2] << 8) + desc_ptr[3];
 407                                         desc_ptr += 4;
 408                                         /* Add trailing zero - pushes into
 409                                          * reserved space */
 410                                         desc_ptr[len] = '\0';
 411                                         name = desc_ptr;
 412                                 }
 413                         }
 414                         if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 415                             type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
 416
 417                                 if (create)
 418                                         ecomp = enclosure_component_register(edev,
 419                                                                              components++,
 420                                                                              type_ptr[0],
 421                                                                              name);
 422                                 else
 423                                         ecomp = &edev->component[components++];
 424
 425                                 if (!IS_ERR(ecomp) && addl_desc_ptr)
 426                                         ses_process_descriptor(ecomp,
 427                                                                addl_desc_ptr);
 428                         }
 429                         if (desc_ptr)
 430                                 desc_ptr += len;
 431
 432                         if (addl_desc_ptr)
 433                                 addl_desc_ptr += addl_desc_ptr[1] + 2;
 434
 435                 }
 436         }
 437         kfree(buf);
 438         kfree(hdr_buf);
 439 }
 440
 441 static void ses_match_to_enclosure(struct enclosure_device *edev,
 442                                    struct scsi_device *sdev)
 443 {
 444         unsigned char *buf;
 445         unsigned char *desc;
 446         unsigned int vpd_len;
 447         struct efd efd = {
 448                 .addr = 0,
 449         };
 450
 451         buf = scsi_get_vpd_page(sdev, 0x83);
 452         if (!buf)
 453                 return;
 454
 455         ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
 456
 457         vpd_len = ((buf[2] << 8) | buf[3]) + 4;
 458
 459         desc = buf + 4;
 460         while (desc < buf + vpd_len) {
 461                 enum scsi_protocol proto = desc[0] >> 4;
 462                 u8 code_set = desc[0] & 0x0f;
 463                 u8 piv = desc[1] & 0x80;
 464                 u8 assoc = (desc[1] & 0x30) >> 4;
 465                 u8 type = desc[1] & 0x0f;
 466                 u8 len = desc[3];
 467
 468                 if (piv && code_set == 1 && assoc == 1
 469                     && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
 470                         efd.addr = (u64)desc[4] << 56 |
 471                                 (u64)desc[5] << 48 |
 472                                 (u64)desc[6] << 40 |
 473                                 (u64)desc[7] << 32 |
 474                                 (u64)desc[8] << 24 |
 475                                 (u64)desc[9] << 16 |
 476                                 (u64)desc[10] << 8 |
 477                                 (u64)desc[11];
 478
 479                 desc += len + 4;
 480         }
 481         if (!efd.addr)
 482                 goto free;
 483
 484         efd.dev = &sdev->sdev_gendev;
 485
 486         enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
 487  free:
 488         kfree(buf);
 489 }
 490
 491 static int ses_intf_add(struct device *cdev,
 492                         struct class_interface *intf)
 493 {
 494         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 495         struct scsi_device *tmp_sdev;
 496         unsigned char *buf = NULL, *hdr_buf, *type_ptr;
 497         struct ses_device *ses_dev;
 498         u32 result;
 499         int i, types, len, components = 0;
 500         int err = -ENOMEM;
 501         struct enclosure_device *edev;
 502         struct ses_component *scomp = NULL;
 503
 504         if (!scsi_device_enclosure(sdev)) {
 505                 /* not an enclosure, but might be in one */
 506                 struct enclosure_device *prev = NULL;
 507
 508                 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
 509                         ses_match_to_enclosure(edev, sdev);
 510                         prev = edev;
 511                 }
 512                 return -ENODEV;
 513         }
 514
 515         /* TYPE_ENCLOSURE prints a message in probe */
 516         if (sdev->type != TYPE_ENCLOSURE)
 517                 sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
 518
 519         ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
 520         hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 521         if (!hdr_buf || !ses_dev)
 522                 goto err_init_free;
 523
 524         result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
 525         if (result)
 526                 goto recv_failed;
 527
 528         if (hdr_buf[1] != 0) {
 529                 /* FIXME: need subenclosure support; I've just never
 530                  * seen a device with subenclosures and it makes the
 531                  * traversal routines more complex */
 532                 sdev_printk(KERN_ERR, sdev,
 533                         "FIXME driver has no support for subenclosures (%d)\n",
 534                         hdr_buf[1]);
 535                 goto err_free;
 536         }
 537
 538         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 539         buf = kzalloc(len, GFP_KERNEL);
 540         if (!buf)
 541                 goto err_free;
 542
 543         result = ses_recv_diag(sdev, 1, buf, len);
 544         if (result)
 545                 goto recv_failed;
 546
 547         types = buf[10];
 548
 549         type_ptr = buf + 12 + buf[11];
 550
 551         for (i = 0; i < types; i++, type_ptr += 4) {
 552                 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 553                     type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 554                         components += type_ptr[1];
 555         }
 556         ses_dev->page1 = buf;
 557         ses_dev->page1_len = len;
 558         buf = NULL;
 559
 560         result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
 561         if (result)
 562                 goto recv_failed;
 563
 564         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 565         buf = kzalloc(len, GFP_KERNEL);
 566         if (!buf)
 567                 goto err_free;
 568
 569         /* make sure getting page 2 actually works */
 570         result = ses_recv_diag(sdev, 2, buf, len);
 571         if (result)
 572                 goto recv_failed;
 573         ses_dev->page2 = buf;
 574         ses_dev->page2_len = len;
 575         buf = NULL;
 576
 577         /* The additional information page --- allows us
 578          * to match up the devices */
 579         result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
 580         if (!result) {
 581
 582                 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 583                 buf = kzalloc(len, GFP_KERNEL);
 584                 if (!buf)
 585                         goto err_free;
 586
 587                 result = ses_recv_diag(sdev, 10, buf, len);
 588                 if (result)
 589                         goto recv_failed;
 590                 ses_dev->page10 = buf;
 591                 ses_dev->page10_len = len;
 592                 buf = NULL;
 593         }
 594         kfree(hdr_buf);
 595
 596         scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
 597         if (!scomp)
 598                 goto err_free;
 599
 600         edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
 601                                   components, &ses_enclosure_callbacks);
 602         if (IS_ERR(edev)) {
 603                 err = PTR_ERR(edev);
 604                 goto err_free;
 605         }
 606
 607         edev->scratch = ses_dev;
 608         for (i = 0; i < components; i++)
 609                 edev->component[i].scratch = scomp + i;
 610
 611         ses_enclosure_data_process(edev, sdev, 1);
 612
 613         /* see if there are any devices matching before
 614          * we found the enclosure */
 615         shost_for_each_device(tmp_sdev, sdev->host) {
 616                 if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
 617                         continue;
 618                 ses_match_to_enclosure(edev, tmp_sdev);
 619         }
 620
 621         return 0;
 622
 623  recv_failed:
 624         sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
 625                     result);
 626         err = -ENODEV;
 627  err_free:
 628         kfree(buf);
 629         kfree(scomp);
 630         kfree(ses_dev->page10);
 631         kfree(ses_dev->page2);
 632         kfree(ses_dev->page1);
 633  err_init_free:
 634         kfree(ses_dev);
 635         kfree(hdr_buf);
 636         sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
 637         return err;
 638 }
 639
 640 static int ses_remove(struct device *dev)
 641 {
 642         return 0;
 643 }
 644
 645 static void ses_intf_remove_component(struct scsi_device *sdev)
 646 {
 647         struct enclosure_device *edev, *prev = NULL;
 648
 649         while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
 650                 prev = edev;
 651                 if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
 652                         break;
 653         }
 654         if (edev)
 655                 put_device(&edev->edev);
 656 }
 657
 658 static void ses_intf_remove_enclosure(struct scsi_device *sdev)
 659 {
 660         struct enclosure_device *edev;
 661         struct ses_device *ses_dev;
 662
 663         /*  exact match to this enclosure */
 664         edev = enclosure_find(&sdev->sdev_gendev, NULL);
 665         if (!edev)
 666                 return;
 667
 668         ses_dev = edev->scratch;
 669         edev->scratch = NULL;
 670
 671         kfree(ses_dev->page10);
 672         kfree(ses_dev->page1);
 673         kfree(ses_dev->page2);
 674         kfree(ses_dev);
 675
 676         kfree(edev->component[0].scratch);
 677
 678         put_device(&edev->edev);
 679         enclosure_unregister(edev);
 680 }
 681
 682 static void ses_intf_remove(struct device *cdev,
 683                             struct class_interface *intf)
 684 {
 685         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 686
 687         if (!scsi_device_enclosure(sdev))
 688                 ses_intf_remove_component(sdev);
 689         else
 690                 ses_intf_remove_enclosure(sdev);
 691 }
 692
 693 static struct class_interface ses_interface = {
 694         .add_dev        = ses_intf_add,
 695         .remove_dev     = ses_intf_remove,
 696 };
 697
 698 static struct scsi_driver ses_template = {
 699         .owner                  = THIS_MODULE,
 700         .gendrv = {
 701                 .name           = "ses",
 702                 .probe          = ses_probe,
 703                 .remove         = ses_remove,
 704         },
 705 };
 706
 707 static int __init ses_init(void)
 708 {
 709         int err;
 710
 711         err = scsi_register_interface(&ses_interface);
 712         if (err)
 713                 return err;
 714
 715         err = scsi_register_driver(&ses_template.gendrv);
 716         if (err)
 717                 goto out_unreg;
 718
 719         return 0;
 720
 721  out_unreg:
 722         scsi_unregister_interface(&ses_interface);
 723         return err;
 724 }
 725
 726 static void __exit ses_exit(void)
 727 {
 728         scsi_unregister_driver(&ses_template.gendrv);
 729         scsi_unregister_interface(&ses_interface);
 730 }
 731
 732 module_init(ses_init);
 733 module_exit(ses_exit);
 734
 735 MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
 736
 737 MODULE_AUTHOR("James Bottomley");
 738 MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
 739 MODULE_LICENSE("GPL v2");