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 #include <asm/unaligned.h>
  29
  30 #include <scsi/scsi.h>
  31 #include <scsi/scsi_cmnd.h>
  32 #include <scsi/scsi_dbg.h>
  33 #include <scsi/scsi_device.h>
  34 #include <scsi/scsi_driver.h>
  35 #include <scsi/scsi_host.h>
  36
  37 struct ses_device {
  38         unsigned char *page1;
  39         unsigned char *page1_types;
  40         unsigned char *page2;
  41         unsigned char *page10;
  42         short page1_len;
  43         short page1_num_types;
  44         short page2_len;
  45         short page10_len;
  46 };
  47
  48 struct ses_component {
  49         u64 addr;
  50         unsigned char *desc;
  51 };
  52
  53 static int ses_probe(struct device *dev)
  54 {
  55         struct scsi_device *sdev = to_scsi_device(dev);
  56         int err = -ENODEV;
  57
  58         if (sdev->type != TYPE_ENCLOSURE)
  59                 goto out;
  60
  61         err = 0;
  62         sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n");
  63
  64  out:
  65         return err;
  66 }
  67
  68 #define SES_TIMEOUT (30 * HZ)
  69 #define SES_RETRIES 3
  70
  71 static int ses_recv_diag(struct scsi_device *sdev, int page_code,
  72                          void *buf, int bufflen)
  73 {
  74         unsigned char cmd[] = {
  75                 RECEIVE_DIAGNOSTIC,
  76                 1,              /* Set PCV bit */
  77                 page_code,
  78                 bufflen >> 8,
  79                 bufflen & 0xff,
  80                 0
  81         };
  82
  83         return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
  84                                 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
  85 }
  86
  87 static int ses_send_diag(struct scsi_device *sdev, int page_code,
  88                          void *buf, int bufflen)
  89 {
  90         u32 result;
  91
  92         unsigned char cmd[] = {
  93                 SEND_DIAGNOSTIC,
  94                 0x10,           /* Set PF bit */
  95                 0,
  96                 bufflen >> 8,
  97                 bufflen & 0xff,
  98                 0
  99         };
 100
 101         result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
 102                                   NULL, SES_TIMEOUT, SES_RETRIES, NULL);
 103         if (result)
 104                 sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
 105                             result);
 106         return result;
 107 }
 108
 109 static int ses_set_page2_descriptor(struct enclosure_device *edev,
 110                                       struct enclosure_component *ecomp,
 111                                       unsigned char *desc)
 112 {
 113         int i, j, count = 0, descriptor = ecomp->number;
 114         struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
 115         struct ses_device *ses_dev = edev->scratch;
 116         unsigned char *type_ptr = ses_dev->page1_types;
 117         unsigned char *desc_ptr = ses_dev->page2 + 8;
 118
 119         /* Clear everything */
 120         memset(desc_ptr, 0, ses_dev->page2_len - 8);
 121         for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
 122                 for (j = 0; j < type_ptr[1]; j++) {
 123                         desc_ptr += 4;
 124                         if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
 125                             type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 126                                 continue;
 127                         if (count++ == descriptor) {
 128                                 memcpy(desc_ptr, desc, 4);
 129                                 /* set select */
 130                                 desc_ptr[0] |= 0x80;
 131                                 /* clear reserved, just in case */
 132                                 desc_ptr[0] &= 0xf0;
 133                         }
 134                 }
 135         }
 136
 137         return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
 138 }
 139
 140 static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
 141                                       struct enclosure_component *ecomp)
 142 {
 143         int i, j, count = 0, descriptor = ecomp->number;
 144         struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
 145         struct ses_device *ses_dev = edev->scratch;
 146         unsigned char *type_ptr = ses_dev->page1_types;
 147         unsigned char *desc_ptr = ses_dev->page2 + 8;
 148
 149         ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
 150
 151         for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
 152                 for (j = 0; j < type_ptr[1]; j++) {
 153                         desc_ptr += 4;
 154                         if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
 155                             type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 156                                 continue;
 157                         if (count++ == descriptor)
 158                                 return desc_ptr;
 159                 }
 160         }
 161         return NULL;
 162 }
 163
 164 /* For device slot and array device slot elements, byte 3 bit 6
 165  * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this
 166  * code stands these bits are shifted 4 positions right so in
 167  * sysfs they will appear as bits 2 and 1 respectively. Strange. */
 168 static void ses_get_fault(struct enclosure_device *edev,
 169                           struct enclosure_component *ecomp)
 170 {
 171         unsigned char *desc;
 172
 173         desc = ses_get_page2_descriptor(edev, ecomp);
 174         if (desc)
 175                 ecomp->fault = (desc[3] & 0x60) >> 4;
 176 }
 177
 178 static int ses_set_fault(struct enclosure_device *edev,
 179                           struct enclosure_component *ecomp,
 180                          enum enclosure_component_setting val)
 181 {
 182         unsigned char desc[4] = {0 };
 183
 184         switch (val) {
 185         case ENCLOSURE_SETTING_DISABLED:
 186                 /* zero is disabled */
 187                 break;
 188         case ENCLOSURE_SETTING_ENABLED:
 189                 desc[3] = 0x20;
 190                 break;
 191         default:
 192                 /* SES doesn't do the SGPIO blink settings */
 193                 return -EINVAL;
 194         }
 195
 196         return ses_set_page2_descriptor(edev, ecomp, desc);
 197 }
 198
 199 static void ses_get_status(struct enclosure_device *edev,
 200                            struct enclosure_component *ecomp)
 201 {
 202         unsigned char *desc;
 203
 204         desc = ses_get_page2_descriptor(edev, ecomp);
 205         if (desc)
 206                 ecomp->status = (desc[0] & 0x0f);
 207 }
 208
 209 static void ses_get_locate(struct enclosure_device *edev,
 210                            struct enclosure_component *ecomp)
 211 {
 212         unsigned char *desc;
 213
 214         desc = ses_get_page2_descriptor(edev, ecomp);
 215         if (desc)
 216                 ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
 217 }
 218
 219 static int ses_set_locate(struct enclosure_device *edev,
 220                           struct enclosure_component *ecomp,
 221                           enum enclosure_component_setting val)
 222 {
 223         unsigned char desc[4] = {0 };
 224
 225         switch (val) {
 226         case ENCLOSURE_SETTING_DISABLED:
 227                 /* zero is disabled */
 228                 break;
 229         case ENCLOSURE_SETTING_ENABLED:
 230                 desc[2] = 0x02;
 231                 break;
 232         default:
 233                 /* SES doesn't do the SGPIO blink settings */
 234                 return -EINVAL;
 235         }
 236         return ses_set_page2_descriptor(edev, ecomp, desc);
 237 }
 238
 239 static int ses_set_active(struct enclosure_device *edev,
 240                           struct enclosure_component *ecomp,
 241                           enum enclosure_component_setting val)
 242 {
 243         unsigned char desc[4] = {0 };
 244
 245         switch (val) {
 246         case ENCLOSURE_SETTING_DISABLED:
 247                 /* zero is disabled */
 248                 ecomp->active = 0;
 249                 break;
 250         case ENCLOSURE_SETTING_ENABLED:
 251                 desc[2] = 0x80;
 252                 ecomp->active = 1;
 253                 break;
 254         default:
 255                 /* SES doesn't do the SGPIO blink settings */
 256                 return -EINVAL;
 257         }
 258         return ses_set_page2_descriptor(edev, ecomp, desc);
 259 }
 260
 261 static struct enclosure_component_callbacks ses_enclosure_callbacks = {
 262         .get_fault              = ses_get_fault,
 263         .set_fault              = ses_set_fault,
 264         .get_status             = ses_get_status,
 265         .get_locate             = ses_get_locate,
 266         .set_locate             = ses_set_locate,
 267         .set_active             = ses_set_active,
 268 };
 269
 270 struct ses_host_edev {
 271         struct Scsi_Host *shost;
 272         struct enclosure_device *edev;
 273 };
 274
 275 #if 0
 276 int ses_match_host(struct enclosure_device *edev, void *data)
 277 {
 278         struct ses_host_edev *sed = data;
 279         struct scsi_device *sdev;
 280
 281         if (!scsi_is_sdev_device(edev->edev.parent))
 282                 return 0;
 283
 284         sdev = to_scsi_device(edev->edev.parent);
 285
 286         if (sdev->host != sed->shost)
 287                 return 0;
 288
 289         sed->edev = edev;
 290         return 1;
 291 }
 292 #endif  /*  0  */
 293
 294 static void ses_process_descriptor(struct enclosure_component *ecomp,
 295                                    unsigned char *desc)
 296 {
 297         int eip = desc[0] & 0x10;
 298         int invalid = desc[0] & 0x80;
 299         enum scsi_protocol proto = desc[0] & 0x0f;
 300         u64 addr = 0;
 301         struct ses_component *scomp = ecomp->scratch;
 302         unsigned char *d;
 303
 304         scomp->desc = desc;
 305
 306         if (invalid)
 307                 return;
 308
 309         switch (proto) {
 310         case SCSI_PROTOCOL_SAS:
 311                 if (eip)
 312                         d = desc + 8;
 313                 else
 314                         d = desc + 4;
 315                 /* only take the phy0 addr */
 316                 addr = (u64)d[12] << 56 |
 317                         (u64)d[13] << 48 |
 318                         (u64)d[14] << 40 |
 319                         (u64)d[15] << 32 |
 320                         (u64)d[16] << 24 |
 321                         (u64)d[17] << 16 |
 322                         (u64)d[18] << 8 |
 323                         (u64)d[19];
 324                 break;
 325         default:
 326                 /* FIXME: Need to add more protocols than just SAS */
 327                 break;
 328         }
 329         scomp->addr = addr;
 330 }
 331
 332 struct efd {
 333         u64 addr;
 334         struct device *dev;
 335 };
 336
 337 static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
 338                                       void *data)
 339 {
 340         struct efd *efd = data;
 341         int i;
 342         struct ses_component *scomp;
 343
 344         if (!edev->component[0].scratch)
 345                 return 0;
 346
 347         for (i = 0; i < edev->components; i++) {
 348                 scomp = edev->component[i].scratch;
 349                 if (scomp->addr != efd->addr)
 350                         continue;
 351
 352                 enclosure_add_device(edev, i, efd->dev);
 353                 return 1;
 354         }
 355         return 0;
 356 }
 357
 358 #define INIT_ALLOC_SIZE 32
 359
 360 static void ses_enclosure_data_process(struct enclosure_device *edev,
 361                                        struct scsi_device *sdev,
 362                                        int create)
 363 {
 364         u32 result;
 365         unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
 366         int i, j, page7_len, len, components;
 367         struct ses_device *ses_dev = edev->scratch;
 368         int types = ses_dev->page1_num_types;
 369         unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 370
 371         if (!hdr_buf)
 372                 goto simple_populate;
 373
 374         /* re-read page 10 */
 375         if (ses_dev->page10)
 376                 ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
 377         /* Page 7 for the descriptors is optional */
 378         result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
 379         if (result)
 380                 goto simple_populate;
 381
 382         page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 383         /* add 1 for trailing '\0' we'll use */
 384         buf = kzalloc(len + 1, GFP_KERNEL);
 385         if (!buf)
 386                 goto simple_populate;
 387         result = ses_recv_diag(sdev, 7, buf, len);
 388         if (result) {
 389  simple_populate:
 390                 kfree(buf);
 391                 buf = NULL;
 392                 desc_ptr = NULL;
 393                 len = 0;
 394                 page7_len = 0;
 395         } else {
 396                 desc_ptr = buf + 8;
 397                 len = (desc_ptr[2] << 8) + desc_ptr[3];
 398                 /* skip past overall descriptor */
 399                 desc_ptr += len + 4;
 400         }
 401         if (ses_dev->page10)
 402                 addl_desc_ptr = ses_dev->page10 + 8;
 403         type_ptr = ses_dev->page1_types;
 404         components = 0;
 405         for (i = 0; i < types; i++, type_ptr += 4) {
 406                 for (j = 0; j < type_ptr[1]; j++) {
 407                         char *name = NULL;
 408                         struct enclosure_component *ecomp;
 409
 410                         if (desc_ptr) {
 411                                 if (desc_ptr >= buf + page7_len) {
 412                                         desc_ptr = NULL;
 413                                 } else {
 414                                         len = (desc_ptr[2] << 8) + desc_ptr[3];
 415                                         desc_ptr += 4;
 416                                         /* Add trailing zero - pushes into
 417                                          * reserved space */
 418                                         desc_ptr[len] = '\0';
 419                                         name = desc_ptr;
 420                                 }
 421                         }
 422                         if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 423                             type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
 424
 425                                 if (create)
 426                                         ecomp = enclosure_component_register(edev,
 427                                                                              components++,
 428                                                                              type_ptr[0],
 429                                                                              name);
 430                                 else
 431                                         ecomp = &edev->component[components++];
 432
 433                                 if (!IS_ERR(ecomp) && addl_desc_ptr)
 434                                         ses_process_descriptor(ecomp,
 435                                                                addl_desc_ptr);
 436                         }
 437                         if (desc_ptr)
 438                                 desc_ptr += len;
 439
 440                         if (addl_desc_ptr)
 441                                 addl_desc_ptr += addl_desc_ptr[1] + 2;
 442
 443                 }
 444         }
 445         kfree(buf);
 446         kfree(hdr_buf);
 447 }
 448
 449 static void ses_match_to_enclosure(struct enclosure_device *edev,
 450                                    struct scsi_device *sdev)
 451 {
 452         unsigned char *desc;
 453         struct efd efd = {
 454                 .addr = 0,
 455         };
 456
 457         ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
 458
 459         if (!sdev->vpd_pg83_len)
 460                 return;
 461
 462         desc = sdev->vpd_pg83 + 4;
 463         while (desc < sdev->vpd_pg83 + sdev->vpd_pg83_len) {
 464                 enum scsi_protocol proto = desc[0] >> 4;
 465                 u8 code_set = desc[0] & 0x0f;
 466                 u8 piv = desc[1] & 0x80;
 467                 u8 assoc = (desc[1] & 0x30) >> 4;
 468                 u8 type = desc[1] & 0x0f;
 469                 u8 len = desc[3];
 470
 471                 if (piv && code_set == 1 && assoc == 1
 472                     && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
 473                         efd.addr = get_unaligned_be64(&desc[4]);
 474
 475                 desc += len + 4;
 476         }
 477         if (efd.addr) {
 478                 efd.dev = &sdev->sdev_gendev;
 479
 480                 enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
 481         }
 482 }
 483
 484 static int ses_intf_add(struct device *cdev,
 485                         struct class_interface *intf)
 486 {
 487         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 488         struct scsi_device *tmp_sdev;
 489         unsigned char *buf = NULL, *hdr_buf, *type_ptr;
 490         struct ses_device *ses_dev;
 491         u32 result;
 492         int i, types, len, components = 0;
 493         int err = -ENOMEM;
 494         int num_enclosures;
 495         struct enclosure_device *edev;
 496         struct ses_component *scomp = NULL;
 497
 498         if (!scsi_device_enclosure(sdev)) {
 499                 /* not an enclosure, but might be in one */
 500                 struct enclosure_device *prev = NULL;
 501
 502                 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
 503                         ses_match_to_enclosure(edev, sdev);
 504                         prev = edev;
 505                 }
 506                 return -ENODEV;
 507         }
 508
 509         /* TYPE_ENCLOSURE prints a message in probe */
 510         if (sdev->type != TYPE_ENCLOSURE)
 511                 sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
 512
 513         ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
 514         hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 515         if (!hdr_buf || !ses_dev)
 516                 goto err_init_free;
 517
 518         result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
 519         if (result)
 520                 goto recv_failed;
 521
 522         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 523         buf = kzalloc(len, GFP_KERNEL);
 524         if (!buf)
 525                 goto err_free;
 526
 527         result = ses_recv_diag(sdev, 1, buf, len);
 528         if (result)
 529                 goto recv_failed;
 530
 531         types = 0;
 532
 533         /* we always have one main enclosure and the rest are referred
 534          * to as secondary subenclosures */
 535         num_enclosures = buf[1] + 1;
 536
 537         /* begin at the enclosure descriptor */
 538         type_ptr = buf + 8;
 539         /* skip all the enclosure descriptors */
 540         for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) {
 541                 types += type_ptr[2];
 542                 type_ptr += type_ptr[3] + 4;
 543         }
 544
 545         ses_dev->page1_types = type_ptr;
 546         ses_dev->page1_num_types = types;
 547
 548         for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) {
 549                 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 550                     type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 551                         components += type_ptr[1];
 552         }
 553         ses_dev->page1 = buf;
 554         ses_dev->page1_len = len;
 555         buf = NULL;
 556
 557         result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
 558         if (result)
 559                 goto recv_failed;
 560
 561         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 562         buf = kzalloc(len, GFP_KERNEL);
 563         if (!buf)
 564                 goto err_free;
 565
 566         /* make sure getting page 2 actually works */
 567         result = ses_recv_diag(sdev, 2, buf, len);
 568         if (result)
 569                 goto recv_failed;
 570         ses_dev->page2 = buf;
 571         ses_dev->page2_len = len;
 572         buf = NULL;
 573
 574         /* The additional information page --- allows us
 575          * to match up the devices */
 576         result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
 577         if (!result) {
 578
 579                 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 580                 buf = kzalloc(len, GFP_KERNEL);
 581                 if (!buf)
 582                         goto err_free;
 583
 584                 result = ses_recv_diag(sdev, 10, buf, len);
 585                 if (result)
 586                         goto recv_failed;
 587                 ses_dev->page10 = buf;
 588                 ses_dev->page10_len = len;
 589                 buf = NULL;
 590         }
 591         scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
 592         if (!scomp)
 593                 goto err_free;
 594
 595         edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
 596                                   components, &ses_enclosure_callbacks);
 597         if (IS_ERR(edev)) {
 598                 err = PTR_ERR(edev);
 599                 goto err_free;
 600         }
 601
 602         kfree(hdr_buf);
 603
 604         edev->scratch = ses_dev;
 605         for (i = 0; i < components; i++)
 606                 edev->component[i].scratch = scomp + i;
 607
 608         ses_enclosure_data_process(edev, sdev, 1);
 609
 610         /* see if there are any devices matching before
 611          * we found the enclosure */
 612         shost_for_each_device(tmp_sdev, sdev->host) {
 613                 if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
 614                         continue;
 615                 ses_match_to_enclosure(edev, tmp_sdev);
 616         }
 617
 618         return 0;
 619
 620  recv_failed:
 621         sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
 622                     result);
 623         err = -ENODEV;
 624  err_free:
 625         kfree(buf);
 626         kfree(scomp);
 627         kfree(ses_dev->page10);
 628         kfree(ses_dev->page2);
 629         kfree(ses_dev->page1);
 630  err_init_free:
 631         kfree(ses_dev);
 632         kfree(hdr_buf);
 633         sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
 634         return err;
 635 }
 636
 637 static int ses_remove(struct device *dev)
 638 {
 639         return 0;
 640 }
 641
 642 static void ses_intf_remove_component(struct scsi_device *sdev)
 643 {
 644         struct enclosure_device *edev, *prev = NULL;
 645
 646         while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
 647                 prev = edev;
 648                 if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
 649                         break;
 650         }
 651         if (edev)
 652                 put_device(&edev->edev);
 653 }
 654
 655 static void ses_intf_remove_enclosure(struct scsi_device *sdev)
 656 {
 657         struct enclosure_device *edev;
 658         struct ses_device *ses_dev;
 659
 660         /*  exact match to this enclosure */
 661         edev = enclosure_find(&sdev->sdev_gendev, NULL);
 662         if (!edev)
 663                 return;
 664
 665         ses_dev = edev->scratch;
 666         edev->scratch = NULL;
 667
 668         kfree(ses_dev->page10);
 669         kfree(ses_dev->page1);
 670         kfree(ses_dev->page2);
 671         kfree(ses_dev);
 672
 673         kfree(edev->component[0].scratch);
 674
 675         put_device(&edev->edev);
 676         enclosure_unregister(edev);
 677 }
 678
 679 static void ses_intf_remove(struct device *cdev,
 680                             struct class_interface *intf)
 681 {
 682         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 683
 684         if (!scsi_device_enclosure(sdev))
 685                 ses_intf_remove_component(sdev);
 686         else
 687                 ses_intf_remove_enclosure(sdev);
 688 }
 689
 690 static struct class_interface ses_interface = {
 691         .add_dev        = ses_intf_add,
 692         .remove_dev     = ses_intf_remove,
 693 };
 694
 695 static struct scsi_driver ses_template = {
 696         .gendrv = {
 697                 .name           = "ses",
 698                 .owner          = THIS_MODULE,
 699                 .probe          = ses_probe,
 700                 .remove         = ses_remove,
 701         },
 702 };
 703
 704 static int __init ses_init(void)
 705 {
 706         int err;
 707
 708         err = scsi_register_interface(&ses_interface);
 709         if (err)
 710                 return err;
 711
 712         err = scsi_register_driver(&ses_template.gendrv);
 713         if (err)
 714                 goto out_unreg;
 715
 716         return 0;
 717
 718  out_unreg:
 719         scsi_unregister_interface(&ses_interface);
 720         return err;
 721 }
 722
 723 static void __exit ses_exit(void)
 724 {
 725         scsi_unregister_driver(&ses_template.gendrv);
 726         scsi_unregister_interface(&ses_interface);
 727 }
 728
 729 module_init(ses_init);
 730 module_exit(ses_exit);
 731
 732 MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
 733
 734 MODULE_AUTHOR("James Bottomley");
 735 MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
 736 MODULE_LICENSE("GPL v2");