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/slab.h>
  25 #include <linux/module.h>
  26 #include <linux/kernel.h>
  27 #include <linux/enclosure.h>
  28
  29 #include <scsi/scsi.h>
  30 #include <scsi/scsi_cmnd.h>
  31 #include <scsi/scsi_dbg.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_driver.h>
  34 #include <scsi/scsi_host.h>
  35
  36 struct ses_device {
  37         unsigned char *page1;
  38         unsigned char *page1_types;
  39         unsigned char *page2;
  40         unsigned char *page10;
  41         short page1_len;
  42         short page1_num_types;
  43         short page2_len;
  44         short page10_len;
  45 };
  46
  47 struct ses_component {
  48         u64 addr;
  49         unsigned char *desc;
  50 };
  51
  52 static int ses_probe(struct device *dev)
  53 {
  54         struct scsi_device *sdev = to_scsi_device(dev);
  55         int err = -ENODEV;
  56
  57         if (sdev->type != TYPE_ENCLOSURE)
  58                 goto out;
  59
  60         err = 0;
  61         sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n");
  62
  63  out:
  64         return err;
  65 }
  66
  67 #define SES_TIMEOUT (30 * HZ)
  68 #define SES_RETRIES 3
  69
  70 static int ses_recv_diag(struct scsi_device *sdev, int page_code,
  71                          void *buf, int bufflen)
  72 {
  73         unsigned char cmd[] = {
  74                 RECEIVE_DIAGNOSTIC,
  75                 1,              /* Set PCV bit */
  76                 page_code,
  77                 bufflen >> 8,
  78                 bufflen & 0xff,
  79                 0
  80         };
  81
  82         return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
  83                                 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
  84 }
  85
  86 static int ses_send_diag(struct scsi_device *sdev, int page_code,
  87                          void *buf, int bufflen)
  88 {
  89         u32 result;
  90
  91         unsigned char cmd[] = {
  92                 SEND_DIAGNOSTIC,
  93                 0x10,           /* Set PF bit */
  94                 0,
  95                 bufflen >> 8,
  96                 bufflen & 0xff,
  97                 0
  98         };
  99
 100         result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
 101                                   NULL, SES_TIMEOUT, SES_RETRIES, NULL);
 102         if (result)
 103                 sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
 104                             result);
 105         return result;
 106 }
 107
 108 static int ses_set_page2_descriptor(struct enclosure_device *edev,
 109                                       struct enclosure_component *ecomp,
 110                                       unsigned char *desc)
 111 {
 112         int i, j, count = 0, descriptor = ecomp->number;
 113         struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
 114         struct ses_device *ses_dev = edev->scratch;
 115         unsigned char *type_ptr = ses_dev->page1_types;
 116         unsigned char *desc_ptr = ses_dev->page2 + 8;
 117
 118         /* Clear everything */
 119         memset(desc_ptr, 0, ses_dev->page2_len - 8);
 120         for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
 121                 for (j = 0; j < type_ptr[1]; j++) {
 122                         desc_ptr += 4;
 123                         if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
 124                             type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 125                                 continue;
 126                         if (count++ == descriptor) {
 127                                 memcpy(desc_ptr, desc, 4);
 128                                 /* set select */
 129                                 desc_ptr[0] |= 0x80;
 130                                 /* clear reserved, just in case */
 131                                 desc_ptr[0] &= 0xf0;
 132                         }
 133                 }
 134         }
 135
 136         return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
 137 }
 138
 139 static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
 140                                       struct enclosure_component *ecomp)
 141 {
 142         int i, j, count = 0, descriptor = ecomp->number;
 143         struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
 144         struct ses_device *ses_dev = edev->scratch;
 145         unsigned char *type_ptr = ses_dev->page1_types;
 146         unsigned char *desc_ptr = ses_dev->page2 + 8;
 147
 148         ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
 149
 150         for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
 151                 for (j = 0; j < type_ptr[1]; j++) {
 152                         desc_ptr += 4;
 153                         if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
 154                             type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 155                                 continue;
 156                         if (count++ == descriptor)
 157                                 return desc_ptr;
 158                 }
 159         }
 160         return NULL;
 161 }
 162
 163 static void ses_get_fault(struct enclosure_device *edev,
 164                           struct enclosure_component *ecomp)
 165 {
 166         unsigned char *desc;
 167
 168         desc = ses_get_page2_descriptor(edev, ecomp);
 169         if (desc)
 170                 ecomp->fault = (desc[3] & 0x60) >> 4;
 171 }
 172
 173 static int ses_set_fault(struct enclosure_device *edev,
 174                           struct enclosure_component *ecomp,
 175                          enum enclosure_component_setting val)
 176 {
 177         unsigned char desc[4] = {0 };
 178
 179         switch (val) {
 180         case ENCLOSURE_SETTING_DISABLED:
 181                 /* zero is disabled */
 182                 break;
 183         case ENCLOSURE_SETTING_ENABLED:
 184                 desc[2] = 0x02;
 185                 break;
 186         default:
 187                 /* SES doesn't do the SGPIO blink settings */
 188                 return -EINVAL;
 189         }
 190
 191         return ses_set_page2_descriptor(edev, ecomp, desc);
 192 }
 193
 194 static void ses_get_status(struct enclosure_device *edev,
 195                            struct enclosure_component *ecomp)
 196 {
 197         unsigned char *desc;
 198
 199         desc = ses_get_page2_descriptor(edev, ecomp);
 200         if (desc)
 201                 ecomp->status = (desc[0] & 0x0f);
 202 }
 203
 204 static void ses_get_locate(struct enclosure_device *edev,
 205                            struct enclosure_component *ecomp)
 206 {
 207         unsigned char *desc;
 208
 209         desc = ses_get_page2_descriptor(edev, ecomp);
 210         if (desc)
 211                 ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
 212 }
 213
 214 static int ses_set_locate(struct enclosure_device *edev,
 215                           struct enclosure_component *ecomp,
 216                           enum enclosure_component_setting val)
 217 {
 218         unsigned char desc[4] = {0 };
 219
 220         switch (val) {
 221         case ENCLOSURE_SETTING_DISABLED:
 222                 /* zero is disabled */
 223                 break;
 224         case ENCLOSURE_SETTING_ENABLED:
 225                 desc[2] = 0x02;
 226                 break;
 227         default:
 228                 /* SES doesn't do the SGPIO blink settings */
 229                 return -EINVAL;
 230         }
 231         return ses_set_page2_descriptor(edev, ecomp, desc);
 232 }
 233
 234 static int ses_set_active(struct enclosure_device *edev,
 235                           struct enclosure_component *ecomp,
 236                           enum enclosure_component_setting val)
 237 {
 238         unsigned char desc[4] = {0 };
 239
 240         switch (val) {
 241         case ENCLOSURE_SETTING_DISABLED:
 242                 /* zero is disabled */
 243                 ecomp->active = 0;
 244                 break;
 245         case ENCLOSURE_SETTING_ENABLED:
 246                 desc[2] = 0x80;
 247                 ecomp->active = 1;
 248                 break;
 249         default:
 250                 /* SES doesn't do the SGPIO blink settings */
 251                 return -EINVAL;
 252         }
 253         return ses_set_page2_descriptor(edev, ecomp, desc);
 254 }
 255
 256 static struct enclosure_component_callbacks ses_enclosure_callbacks = {
 257         .get_fault              = ses_get_fault,
 258         .set_fault              = ses_set_fault,
 259         .get_status             = ses_get_status,
 260         .get_locate             = ses_get_locate,
 261         .set_locate             = ses_set_locate,
 262         .set_active             = ses_set_active,
 263 };
 264
 265 struct ses_host_edev {
 266         struct Scsi_Host *shost;
 267         struct enclosure_device *edev;
 268 };
 269
 270 #if 0
 271 int ses_match_host(struct enclosure_device *edev, void *data)
 272 {
 273         struct ses_host_edev *sed = data;
 274         struct scsi_device *sdev;
 275
 276         if (!scsi_is_sdev_device(edev->edev.parent))
 277                 return 0;
 278
 279         sdev = to_scsi_device(edev->edev.parent);
 280
 281         if (sdev->host != sed->shost)
 282                 return 0;
 283
 284         sed->edev = edev;
 285         return 1;
 286 }
 287 #endif  /*  0  */
 288
 289 static void ses_process_descriptor(struct enclosure_component *ecomp,
 290                                    unsigned char *desc)
 291 {
 292         int eip = desc[0] & 0x10;
 293         int invalid = desc[0] & 0x80;
 294         enum scsi_protocol proto = desc[0] & 0x0f;
 295         u64 addr = 0;
 296         struct ses_component *scomp = ecomp->scratch;
 297         unsigned char *d;
 298
 299         scomp->desc = desc;
 300
 301         if (invalid)
 302                 return;
 303
 304         switch (proto) {
 305         case SCSI_PROTOCOL_SAS:
 306                 if (eip)
 307                         d = desc + 8;
 308                 else
 309                         d = desc + 4;
 310                 /* only take the phy0 addr */
 311                 addr = (u64)d[12] << 56 |
 312                         (u64)d[13] << 48 |
 313                         (u64)d[14] << 40 |
 314                         (u64)d[15] << 32 |
 315                         (u64)d[16] << 24 |
 316                         (u64)d[17] << 16 |
 317                         (u64)d[18] << 8 |
 318                         (u64)d[19];
 319                 break;
 320         default:
 321                 /* FIXME: Need to add more protocols than just SAS */
 322                 break;
 323         }
 324         scomp->addr = addr;
 325 }
 326
 327 struct efd {
 328         u64 addr;
 329         struct device *dev;
 330 };
 331
 332 static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
 333                                       void *data)
 334 {
 335         struct efd *efd = data;
 336         int i;
 337         struct ses_component *scomp;
 338
 339         if (!edev->component[0].scratch)
 340                 return 0;
 341
 342         for (i = 0; i < edev->components; i++) {
 343                 scomp = edev->component[i].scratch;
 344                 if (scomp->addr != efd->addr)
 345                         continue;
 346
 347                 enclosure_add_device(edev, i, efd->dev);
 348                 return 1;
 349         }
 350         return 0;
 351 }
 352
 353 #define INIT_ALLOC_SIZE 32
 354
 355 static void ses_enclosure_data_process(struct enclosure_device *edev,
 356                                        struct scsi_device *sdev,
 357                                        int create)
 358 {
 359         u32 result;
 360         unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
 361         int i, j, page7_len, len, components;
 362         struct ses_device *ses_dev = edev->scratch;
 363         int types = ses_dev->page1_num_types;
 364         unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 365
 366         if (!hdr_buf)
 367                 goto simple_populate;
 368
 369         /* re-read page 10 */
 370         if (ses_dev->page10)
 371                 ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
 372         /* Page 7 for the descriptors is optional */
 373         result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
 374         if (result)
 375                 goto simple_populate;
 376
 377         page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 378         /* add 1 for trailing '\0' we'll use */
 379         buf = kzalloc(len + 1, GFP_KERNEL);
 380         if (!buf)
 381                 goto simple_populate;
 382         result = ses_recv_diag(sdev, 7, buf, len);
 383         if (result) {
 384  simple_populate:
 385                 kfree(buf);
 386                 buf = NULL;
 387                 desc_ptr = NULL;
 388                 len = 0;
 389                 page7_len = 0;
 390         } else {
 391                 desc_ptr = buf + 8;
 392                 len = (desc_ptr[2] << 8) + desc_ptr[3];
 393                 /* skip past overall descriptor */
 394                 desc_ptr += len + 4;
 395         }
 396         if (ses_dev->page10)
 397                 addl_desc_ptr = ses_dev->page10 + 8;
 398         type_ptr = ses_dev->page1_types;
 399         components = 0;
 400         for (i = 0; i < types; i++, type_ptr += 4) {
 401                 for (j = 0; j < type_ptr[1]; j++) {
 402                         char *name = NULL;
 403                         struct enclosure_component *ecomp;
 404
 405                         if (desc_ptr) {
 406                                 if (desc_ptr >= buf + page7_len) {
 407                                         desc_ptr = NULL;
 408                                 } else {
 409                                         len = (desc_ptr[2] << 8) + desc_ptr[3];
 410                                         desc_ptr += 4;
 411                                         /* Add trailing zero - pushes into
 412                                          * reserved space */
 413                                         desc_ptr[len] = '\0';
 414                                         name = desc_ptr;
 415                                 }
 416                         }
 417                         if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 418                             type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
 419
 420                                 if (create)
 421                                         ecomp = enclosure_component_register(edev,
 422                                                                              components++,
 423                                                                              type_ptr[0],
 424                                                                              name);
 425                                 else
 426                                         ecomp = &edev->component[components++];
 427
 428                                 if (!IS_ERR(ecomp) && addl_desc_ptr)
 429                                         ses_process_descriptor(ecomp,
 430                                                                addl_desc_ptr);
 431                         }
 432                         if (desc_ptr)
 433                                 desc_ptr += len;
 434
 435                         if (addl_desc_ptr)
 436                                 addl_desc_ptr += addl_desc_ptr[1] + 2;
 437
 438                 }
 439         }
 440         kfree(buf);
 441         kfree(hdr_buf);
 442 }
 443
 444 static void ses_match_to_enclosure(struct enclosure_device *edev,
 445                                    struct scsi_device *sdev)
 446 {
 447         unsigned char *buf;
 448         unsigned char *desc;
 449         unsigned int vpd_len;
 450         struct efd efd = {
 451                 .addr = 0,
 452         };
 453
 454         buf = kmalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 455         if (!buf || scsi_get_vpd_page(sdev, 0x83, buf, INIT_ALLOC_SIZE))
 456                 goto free;
 457
 458         ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
 459
 460         vpd_len = ((buf[2] << 8) | buf[3]) + 4;
 461         kfree(buf);
 462         buf = kmalloc(vpd_len, GFP_KERNEL);
 463         if (!buf ||scsi_get_vpd_page(sdev, 0x83, buf, vpd_len))
 464                 goto free;
 465
 466         desc = buf + 4;
 467         while (desc < buf + vpd_len) {
 468                 enum scsi_protocol proto = desc[0] >> 4;
 469                 u8 code_set = desc[0] & 0x0f;
 470                 u8 piv = desc[1] & 0x80;
 471                 u8 assoc = (desc[1] & 0x30) >> 4;
 472                 u8 type = desc[1] & 0x0f;
 473                 u8 len = desc[3];
 474
 475                 if (piv && code_set == 1 && assoc == 1
 476                     && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
 477                         efd.addr = (u64)desc[4] << 56 |
 478                                 (u64)desc[5] << 48 |
 479                                 (u64)desc[6] << 40 |
 480                                 (u64)desc[7] << 32 |
 481                                 (u64)desc[8] << 24 |
 482                                 (u64)desc[9] << 16 |
 483                                 (u64)desc[10] << 8 |
 484                                 (u64)desc[11];
 485
 486                 desc += len + 4;
 487         }
 488         if (!efd.addr)
 489                 goto free;
 490
 491         efd.dev = &sdev->sdev_gendev;
 492
 493         enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
 494  free:
 495         kfree(buf);
 496 }
 497
 498 static int ses_intf_add(struct device *cdev,
 499                         struct class_interface *intf)
 500 {
 501         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 502         struct scsi_device *tmp_sdev;
 503         unsigned char *buf = NULL, *hdr_buf, *type_ptr;
 504         struct ses_device *ses_dev;
 505         u32 result;
 506         int i, types, len, components = 0;
 507         int err = -ENOMEM;
 508         int num_enclosures;
 509         struct enclosure_device *edev;
 510         struct ses_component *scomp = NULL;
 511
 512         if (!scsi_device_enclosure(sdev)) {
 513                 /* not an enclosure, but might be in one */
 514                 struct enclosure_device *prev = NULL;
 515
 516                 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
 517                         ses_match_to_enclosure(edev, sdev);
 518                         prev = edev;
 519                 }
 520                 return -ENODEV;
 521         }
 522
 523         /* TYPE_ENCLOSURE prints a message in probe */
 524         if (sdev->type != TYPE_ENCLOSURE)
 525                 sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
 526
 527         ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
 528         hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 529         if (!hdr_buf || !ses_dev)
 530                 goto err_init_free;
 531
 532         result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
 533         if (result)
 534                 goto recv_failed;
 535
 536         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 537         buf = kzalloc(len, GFP_KERNEL);
 538         if (!buf)
 539                 goto err_free;
 540
 541         result = ses_recv_diag(sdev, 1, buf, len);
 542         if (result)
 543                 goto recv_failed;
 544
 545         types = 0;
 546
 547         /* we always have one main enclosure and the rest are referred
 548          * to as secondary subenclosures */
 549         num_enclosures = buf[1] + 1;
 550
 551         /* begin at the enclosure descriptor */
 552         type_ptr = buf + 8;
 553         /* skip all the enclosure descriptors */
 554         for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) {
 555                 types += type_ptr[2];
 556                 type_ptr += type_ptr[3] + 4;
 557         }
 558
 559         ses_dev->page1_types = type_ptr;
 560         ses_dev->page1_num_types = types;
 561
 562         for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) {
 563                 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 564                     type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 565                         components += type_ptr[1];
 566         }
 567         ses_dev->page1 = buf;
 568         ses_dev->page1_len = len;
 569         buf = NULL;
 570
 571         result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
 572         if (result)
 573                 goto recv_failed;
 574
 575         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 576         buf = kzalloc(len, GFP_KERNEL);
 577         if (!buf)
 578                 goto err_free;
 579
 580         /* make sure getting page 2 actually works */
 581         result = ses_recv_diag(sdev, 2, buf, len);
 582         if (result)
 583                 goto recv_failed;
 584         ses_dev->page2 = buf;
 585         ses_dev->page2_len = len;
 586         buf = NULL;
 587
 588         /* The additional information page --- allows us
 589          * to match up the devices */
 590         result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
 591         if (!result) {
 592
 593                 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 594                 buf = kzalloc(len, GFP_KERNEL);
 595                 if (!buf)
 596                         goto err_free;
 597
 598                 result = ses_recv_diag(sdev, 10, buf, len);
 599                 if (result)
 600                         goto recv_failed;
 601                 ses_dev->page10 = buf;
 602                 ses_dev->page10_len = len;
 603                 buf = NULL;
 604         }
 605         scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
 606         if (!scomp)
 607                 goto err_free;
 608
 609         edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
 610                                   components, &ses_enclosure_callbacks);
 611         if (IS_ERR(edev)) {
 612                 err = PTR_ERR(edev);
 613                 goto err_free;
 614         }
 615
 616         kfree(hdr_buf);
 617
 618         edev->scratch = ses_dev;
 619         for (i = 0; i < components; i++)
 620                 edev->component[i].scratch = scomp + i;
 621
 622         ses_enclosure_data_process(edev, sdev, 1);
 623
 624         /* see if there are any devices matching before
 625          * we found the enclosure */
 626         shost_for_each_device(tmp_sdev, sdev->host) {
 627                 if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
 628                         continue;
 629                 ses_match_to_enclosure(edev, tmp_sdev);
 630         }
 631
 632         return 0;
 633
 634  recv_failed:
 635         sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
 636                     result);
 637         err = -ENODEV;
 638  err_free:
 639         kfree(buf);
 640         kfree(scomp);
 641         kfree(ses_dev->page10);
 642         kfree(ses_dev->page2);
 643         kfree(ses_dev->page1);
 644  err_init_free:
 645         kfree(ses_dev);
 646         kfree(hdr_buf);
 647         sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
 648         return err;
 649 }
 650
 651 static int ses_remove(struct device *dev)
 652 {
 653         return 0;
 654 }
 655
 656 static void ses_intf_remove_component(struct scsi_device *sdev)
 657 {
 658         struct enclosure_device *edev, *prev = NULL;
 659
 660         while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
 661                 prev = edev;
 662                 if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
 663                         break;
 664         }
 665         if (edev)
 666                 put_device(&edev->edev);
 667 }
 668
 669 static void ses_intf_remove_enclosure(struct scsi_device *sdev)
 670 {
 671         struct enclosure_device *edev;
 672         struct ses_device *ses_dev;
 673
 674         /*  exact match to this enclosure */
 675         edev = enclosure_find(&sdev->sdev_gendev, NULL);
 676         if (!edev)
 677                 return;
 678
 679         ses_dev = edev->scratch;
 680         edev->scratch = NULL;
 681
 682         kfree(ses_dev->page10);
 683         kfree(ses_dev->page1);
 684         kfree(ses_dev->page2);
 685         kfree(ses_dev);
 686
 687         kfree(edev->component[0].scratch);
 688
 689         put_device(&edev->edev);
 690         enclosure_unregister(edev);
 691 }
 692
 693 static void ses_intf_remove(struct device *cdev,
 694                             struct class_interface *intf)
 695 {
 696         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 697
 698         if (!scsi_device_enclosure(sdev))
 699                 ses_intf_remove_component(sdev);
 700         else
 701                 ses_intf_remove_enclosure(sdev);
 702 }
 703
 704 static struct class_interface ses_interface = {
 705         .add_dev        = ses_intf_add,
 706         .remove_dev     = ses_intf_remove,
 707 };
 708
 709 static struct scsi_driver ses_template = {
 710         .owner                  = THIS_MODULE,
 711         .gendrv = {
 712                 .name           = "ses",
 713                 .probe          = ses_probe,
 714                 .remove         = ses_remove,
 715         },
 716 };
 717
 718 static int __init ses_init(void)
 719 {
 720         int err;
 721
 722         err = scsi_register_interface(&ses_interface);
 723         if (err)
 724                 return err;
 725
 726         err = scsi_register_driver(&ses_template.gendrv);
 727         if (err)
 728                 goto out_unreg;
 729
 730         return 0;
 731
 732  out_unreg:
 733         scsi_unregister_interface(&ses_interface);
 734         return err;
 735 }
 736
 737 static void __exit ses_exit(void)
 738 {
 739         scsi_unregister_driver(&ses_template.gendrv);
 740         scsi_unregister_interface(&ses_interface);
 741 }
 742
 743 module_init(ses_init);
 744 module_exit(ses_exit);
 745
 746 MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
 747
 748 MODULE_AUTHOR("James Bottomley");
 749 MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
 750 MODULE_LICENSE("GPL v2");