drivers/scsi/scsi_transport_sas.c

   1 /*
   2  * Copyright (C) 2005-2006 Dell Inc.
   3  *      Released under GPL v2.
   4  *
   5  * Serial Attached SCSI (SAS) transport class.
   6  *
   7  * The SAS transport class contains common code to deal with SAS HBAs,
   8  * an aproximated representation of SAS topologies in the driver model,
   9  * and various sysfs attributes to expose these topologies and managment
  10  * interfaces to userspace.
  11  *
  12  * In addition to the basic SCSI core objects this transport class
  13  * introduces two additional intermediate objects:  The SAS PHY
  14  * as represented by struct sas_phy defines an "outgoing" PHY on
  15  * a SAS HBA or Expander, and the SAS remote PHY represented by
  16  * struct sas_rphy defines an "incoming" PHY on a SAS Expander or
  17  * end device.  Note that this is purely a software concept, the
  18  * underlying hardware for a PHY and a remote PHY is the exactly
  19  * the same.
  20  *
  21  * There is no concept of a SAS port in this code, users can see
  22  * what PHYs form a wide port based on the port_identifier attribute,
  23  * which is the same for all PHYs in a port.
  24  */
  25
  26 #include <linux/init.h>
  27 #include <linux/module.h>
  28 #include <linux/err.h>
  29 #include <linux/slab.h>
  30 #include <linux/string.h>
  31
  32 #include <scsi/scsi.h>
  33 #include <scsi/scsi_device.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_transport.h>
  36 #include <scsi/scsi_transport_sas.h>
  37
  38
  39 #define SAS_HOST_ATTRS          0
  40 #define SAS_PORT_ATTRS          17
  41 #define SAS_RPORT_ATTRS         7
  42 #define SAS_END_DEV_ATTRS       3
  43 #define SAS_EXPANDER_ATTRS      7
  44
  45 struct sas_internal {
  46         struct scsi_transport_template t;
  47         struct sas_function_template *f;
  48
  49         struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS];
  50         struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS];
  51         struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS];
  52         struct class_device_attribute private_end_dev_attrs[SAS_END_DEV_ATTRS];
  53         struct class_device_attribute private_expander_attrs[SAS_EXPANDER_ATTRS];
  54
  55         struct transport_container phy_attr_cont;
  56         struct transport_container rphy_attr_cont;
  57         struct transport_container end_dev_attr_cont;
  58         struct transport_container expander_attr_cont;
  59
  60         /*
  61          * The array of null terminated pointers to attributes
  62          * needed by scsi_sysfs.c
  63          */
  64         struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1];
  65         struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1];
  66         struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1];
  67         struct class_device_attribute *end_dev_attrs[SAS_END_DEV_ATTRS + 1];
  68         struct class_device_attribute *expander_attrs[SAS_EXPANDER_ATTRS + 1];
  69 };
  70 #define to_sas_internal(tmpl)   container_of(tmpl, struct sas_internal, t)
  71
  72 struct sas_host_attrs {
  73         struct list_head rphy_list;
  74         struct mutex lock;
  75         u32 next_target_id;
  76         u32 next_expander_id;
  77 };
  78 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
  79
  80
  81 /*
  82  * Hack to allow attributes of the same name in different objects.
  83  */
  84 #define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  85         struct class_device_attribute class_device_attr_##_prefix##_##_name = \
  86         __ATTR(_name,_mode,_show,_store)
  87
  88
  89 /*
  90  * Pretty printing helpers
  91  */
  92
  93 #define sas_bitfield_name_match(title, table)                   \
  94 static ssize_t                                                  \
  95 get_sas_##title##_names(u32 table_key, char *buf)               \
  96 {                                                               \
  97         char *prefix = "";                                      \
  98         ssize_t len = 0;                                        \
  99         int i;                                                  \
 100                                                                 \
 101         for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) {  \
 102                 if (table[i].value & table_key) {               \
 103                         len += sprintf(buf + len, "%s%s",       \
 104                                 prefix, table[i].name);         \
 105                         prefix = ", ";                          \
 106                 }                                               \
 107         }                                                       \
 108         len += sprintf(buf + len, "\n");                        \
 109         return len;                                             \
 110 }
 111
 112 #define sas_bitfield_name_search(title, table)                  \
 113 static ssize_t                                                  \
 114 get_sas_##title##_names(u32 table_key, char *buf)               \
 115 {                                                               \
 116         ssize_t len = 0;                                        \
 117         int i;                                                  \
 118                                                                 \
 119         for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) {  \
 120                 if (table[i].value == table_key) {              \
 121                         len += sprintf(buf + len, "%s",         \
 122                                 table[i].name);                 \
 123                         break;                                  \
 124                 }                                               \
 125         }                                                       \
 126         len += sprintf(buf + len, "\n");                        \
 127         return len;                                             \
 128 }
 129
 130 static struct {
 131         u32             value;
 132         char            *name;
 133 } sas_device_type_names[] = {
 134         { SAS_PHY_UNUSED,               "unused" },
 135         { SAS_END_DEVICE,               "end device" },
 136         { SAS_EDGE_EXPANDER_DEVICE,     "edge expander" },
 137         { SAS_FANOUT_EXPANDER_DEVICE,   "fanout expander" },
 138 };
 139 sas_bitfield_name_search(device_type, sas_device_type_names)
 140
 141
 142 static struct {
 143         u32             value;
 144         char            *name;
 145 } sas_protocol_names[] = {
 146         { SAS_PROTOCOL_SATA,            "sata" },
 147         { SAS_PROTOCOL_SMP,             "smp" },
 148         { SAS_PROTOCOL_STP,             "stp" },
 149         { SAS_PROTOCOL_SSP,             "ssp" },
 150 };
 151 sas_bitfield_name_match(protocol, sas_protocol_names)
 152
 153 static struct {
 154         u32             value;
 155         char            *name;
 156 } sas_linkspeed_names[] = {
 157         { SAS_LINK_RATE_UNKNOWN,        "Unknown" },
 158         { SAS_PHY_DISABLED,             "Phy disabled" },
 159         { SAS_LINK_RATE_FAILED,         "Link Rate failed" },
 160         { SAS_SATA_SPINUP_HOLD,         "Spin-up hold" },
 161         { SAS_LINK_RATE_1_5_GBPS,       "1.5 Gbit" },
 162         { SAS_LINK_RATE_3_0_GBPS,       "3.0 Gbit" },
 163         { SAS_LINK_RATE_6_0_GBPS,       "6.0 Gbit" },
 164 };
 165 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 166
 167
 168 /*
 169  * SAS host attributes
 170  */
 171
 172 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 173                           struct class_device *cdev)
 174 {
 175         struct Scsi_Host *shost = dev_to_shost(dev);
 176         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 177
 178         INIT_LIST_HEAD(&sas_host->rphy_list);
 179         mutex_init(&sas_host->lock);
 180         sas_host->next_target_id = 0;
 181         sas_host->next_expander_id = 0;
 182         return 0;
 183 }
 184
 185 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 186                 "sas_host", sas_host_setup, NULL, NULL);
 187
 188 static int sas_host_match(struct attribute_container *cont,
 189                             struct device *dev)
 190 {
 191         struct Scsi_Host *shost;
 192         struct sas_internal *i;
 193
 194         if (!scsi_is_host_device(dev))
 195                 return 0;
 196         shost = dev_to_shost(dev);
 197
 198         if (!shost->transportt)
 199                 return 0;
 200         if (shost->transportt->host_attrs.ac.class !=
 201                         &sas_host_class.class)
 202                 return 0;
 203
 204         i = to_sas_internal(shost->transportt);
 205         return &i->t.host_attrs.ac == cont;
 206 }
 207
 208 static int do_sas_phy_delete(struct device *dev, void *data)
 209 {
 210         if (scsi_is_sas_phy(dev))
 211                 sas_phy_delete(dev_to_phy(dev));
 212         return 0;
 213 }
 214
 215 /**
 216  * sas_remove_host  --  tear down a Scsi_Host's SAS data structures
 217  * @shost:      Scsi Host that is torn down
 218  *
 219  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
 220  * Must be called just before scsi_remove_host for SAS HBAs.
 221  */
 222 void sas_remove_host(struct Scsi_Host *shost)
 223 {
 224         device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete);
 225 }
 226 EXPORT_SYMBOL(sas_remove_host);
 227
 228
 229 /*
 230  * SAS Port attributes
 231  */
 232
 233 #define sas_phy_show_simple(field, name, format_string, cast)           \
 234 static ssize_t                                                          \
 235 show_sas_phy_##name(struct class_device *cdev, char *buf)               \
 236 {                                                                       \
 237         struct sas_phy *phy = transport_class_to_phy(cdev);             \
 238                                                                         \
 239         return snprintf(buf, 20, format_string, cast phy->field);       \
 240 }
 241
 242 #define sas_phy_simple_attr(field, name, format_string, type)           \
 243         sas_phy_show_simple(field, name, format_string, (type)) \
 244 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 245
 246 #define sas_phy_show_protocol(field, name)                              \
 247 static ssize_t                                                          \
 248 show_sas_phy_##name(struct class_device *cdev, char *buf)               \
 249 {                                                                       \
 250         struct sas_phy *phy = transport_class_to_phy(cdev);             \
 251                                                                         \
 252         if (!phy->field)                                                \
 253                 return snprintf(buf, 20, "none\n");                     \
 254         return get_sas_protocol_names(phy->field, buf);         \
 255 }
 256
 257 #define sas_phy_protocol_attr(field, name)                              \
 258         sas_phy_show_protocol(field, name)                              \
 259 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 260
 261 #define sas_phy_show_linkspeed(field)                                   \
 262 static ssize_t                                                          \
 263 show_sas_phy_##field(struct class_device *cdev, char *buf)              \
 264 {                                                                       \
 265         struct sas_phy *phy = transport_class_to_phy(cdev);             \
 266                                                                         \
 267         return get_sas_linkspeed_names(phy->field, buf);                \
 268 }
 269
 270 #define sas_phy_linkspeed_attr(field)                                   \
 271         sas_phy_show_linkspeed(field)                                   \
 272 static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 273
 274 #define sas_phy_show_linkerror(field)                                   \
 275 static ssize_t                                                          \
 276 show_sas_phy_##field(struct class_device *cdev, char *buf)              \
 277 {                                                                       \
 278         struct sas_phy *phy = transport_class_to_phy(cdev);             \
 279         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 280         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 281         int error;                                                      \
 282                                                                         \
 283         if (!phy->local_attached)                                       \
 284                 return -EINVAL;                                         \
 285                                                                         \
 286         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 287         if (error)                                                      \
 288                 return error;                                           \
 289         return snprintf(buf, 20, "%u\n", phy->field);                   \
 290 }
 291
 292 #define sas_phy_linkerror_attr(field)                                   \
 293         sas_phy_show_linkerror(field)                                   \
 294 static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 295
 296
 297 static ssize_t
 298 show_sas_device_type(struct class_device *cdev, char *buf)
 299 {
 300         struct sas_phy *phy = transport_class_to_phy(cdev);
 301
 302         if (!phy->identify.device_type)
 303                 return snprintf(buf, 20, "none\n");
 304         return get_sas_device_type_names(phy->identify.device_type, buf);
 305 }
 306 static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 307
 308 static ssize_t do_sas_phy_reset(struct class_device *cdev,
 309                 size_t count, int hard_reset)
 310 {
 311         struct sas_phy *phy = transport_class_to_phy(cdev);
 312         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 313         struct sas_internal *i = to_sas_internal(shost->transportt);
 314         int error;
 315
 316         if (!phy->local_attached)
 317                 return -EINVAL;
 318
 319         error = i->f->phy_reset(phy, hard_reset);
 320         if (error)
 321                 return error;
 322         return count;
 323 };
 324
 325 static ssize_t store_sas_link_reset(struct class_device *cdev,
 326                 const char *buf, size_t count)
 327 {
 328         return do_sas_phy_reset(cdev, count, 0);
 329 }
 330 static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 331
 332 static ssize_t store_sas_hard_reset(struct class_device *cdev,
 333                 const char *buf, size_t count)
 334 {
 335         return do_sas_phy_reset(cdev, count, 1);
 336 }
 337 static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 338
 339 sas_phy_protocol_attr(identify.initiator_port_protocols,
 340                 initiator_port_protocols);
 341 sas_phy_protocol_attr(identify.target_port_protocols,
 342                 target_port_protocols);
 343 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 344                 unsigned long long);
 345 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 346 sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);
 347 sas_phy_linkspeed_attr(negotiated_linkrate);
 348 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 349 sas_phy_linkspeed_attr(minimum_linkrate);
 350 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 351 sas_phy_linkspeed_attr(maximum_linkrate);
 352 sas_phy_linkerror_attr(invalid_dword_count);
 353 sas_phy_linkerror_attr(running_disparity_error_count);
 354 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 355 sas_phy_linkerror_attr(phy_reset_problem_count);
 356
 357
 358 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 359                 "sas_phy", NULL, NULL, NULL);
 360
 361 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 362 {
 363         struct Scsi_Host *shost;
 364         struct sas_internal *i;
 365
 366         if (!scsi_is_sas_phy(dev))
 367                 return 0;
 368         shost = dev_to_shost(dev->parent);
 369
 370         if (!shost->transportt)
 371                 return 0;
 372         if (shost->transportt->host_attrs.ac.class !=
 373                         &sas_host_class.class)
 374                 return 0;
 375
 376         i = to_sas_internal(shost->transportt);
 377         return &i->phy_attr_cont.ac == cont;
 378 }
 379
 380 static void sas_phy_release(struct device *dev)
 381 {
 382         struct sas_phy *phy = dev_to_phy(dev);
 383
 384         put_device(dev->parent);
 385         kfree(phy);
 386 }
 387
 388 /**
 389  * sas_phy_alloc  --  allocates and initialize a SAS PHY structure
 390  * @parent:     Parent device
 391  * @number:     Phy index
 392  *
 393  * Allocates an SAS PHY structure.  It will be added in the device tree
 394  * below the device specified by @parent, which has to be either a Scsi_Host
 395  * or sas_rphy.
 396  *
 397  * Returns:
 398  *      SAS PHY allocated or %NULL if the allocation failed.
 399  */
 400 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 401 {
 402         struct Scsi_Host *shost = dev_to_shost(parent);
 403         struct sas_phy *phy;
 404
 405         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 406         if (!phy)
 407                 return NULL;
 408
 409         get_device(parent);
 410
 411         phy->number = number;
 412
 413         device_initialize(&phy->dev);
 414         phy->dev.parent = get_device(parent);
 415         phy->dev.release = sas_phy_release;
 416         if (scsi_is_sas_expander_device(parent)) {
 417                 struct sas_rphy *rphy = dev_to_rphy(parent);
 418                 sprintf(phy->dev.bus_id, "phy-%d-%d:%d", shost->host_no,
 419                         rphy->scsi_target_id, number);
 420         } else
 421                 sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
 422
 423         transport_setup_device(&phy->dev);
 424
 425         return phy;
 426 }
 427 EXPORT_SYMBOL(sas_phy_alloc);
 428
 429 /**
 430  * sas_phy_add  --  add a SAS PHY to the device hierachy
 431  * @phy:        The PHY to be added
 432  *
 433  * Publishes a SAS PHY to the rest of the system.
 434  */
 435 int sas_phy_add(struct sas_phy *phy)
 436 {
 437         int error;
 438
 439         error = device_add(&phy->dev);
 440         if (!error) {
 441                 transport_add_device(&phy->dev);
 442                 transport_configure_device(&phy->dev);
 443         }
 444
 445         return error;
 446 }
 447 EXPORT_SYMBOL(sas_phy_add);
 448
 449 /**
 450  * sas_phy_free  --  free a SAS PHY
 451  * @phy:        SAS PHY to free
 452  *
 453  * Frees the specified SAS PHY.
 454  *
 455  * Note:
 456  *   This function must only be called on a PHY that has not
 457  *   sucessfully been added using sas_phy_add().
 458  */
 459 void sas_phy_free(struct sas_phy *phy)
 460 {
 461         transport_destroy_device(&phy->dev);
 462         put_device(phy->dev.parent);
 463         put_device(phy->dev.parent);
 464         put_device(phy->dev.parent);
 465         kfree(phy);
 466 }
 467 EXPORT_SYMBOL(sas_phy_free);
 468
 469 /**
 470  * sas_phy_delete  --  remove SAS PHY
 471  * @phy:        SAS PHY to remove
 472  *
 473  * Removes the specified SAS PHY.  If the SAS PHY has an
 474  * associated remote PHY it is removed before.
 475  */
 476 void
 477 sas_phy_delete(struct sas_phy *phy)
 478 {
 479         struct device *dev = &phy->dev;
 480
 481         if (phy->rphy)
 482                 sas_rphy_delete(phy->rphy);
 483
 484         transport_remove_device(dev);
 485         device_del(dev);
 486         transport_destroy_device(dev);
 487         put_device(dev->parent);
 488 }
 489 EXPORT_SYMBOL(sas_phy_delete);
 490
 491 /**
 492  * scsi_is_sas_phy  --  check if a struct device represents a SAS PHY
 493  * @dev:        device to check
 494  *
 495  * Returns:
 496  *      %1 if the device represents a SAS PHY, %0 else
 497  */
 498 int scsi_is_sas_phy(const struct device *dev)
 499 {
 500         return dev->release == sas_phy_release;
 501 }
 502 EXPORT_SYMBOL(scsi_is_sas_phy);
 503
 504 /*
 505  * SAS remote PHY attributes.
 506  */
 507
 508 #define sas_rphy_show_simple(field, name, format_string, cast)          \
 509 static ssize_t                                                          \
 510 show_sas_rphy_##name(struct class_device *cdev, char *buf)              \
 511 {                                                                       \
 512         struct sas_rphy *rphy = transport_class_to_rphy(cdev);  \
 513                                                                         \
 514         return snprintf(buf, 20, format_string, cast rphy->field);      \
 515 }
 516
 517 #define sas_rphy_simple_attr(field, name, format_string, type)          \
 518         sas_rphy_show_simple(field, name, format_string, (type))        \
 519 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO,                       \
 520                 show_sas_rphy_##name, NULL)
 521
 522 #define sas_rphy_show_protocol(field, name)                             \
 523 static ssize_t                                                          \
 524 show_sas_rphy_##name(struct class_device *cdev, char *buf)              \
 525 {                                                                       \
 526         struct sas_rphy *rphy = transport_class_to_rphy(cdev);  \
 527                                                                         \
 528         if (!rphy->field)                                       \
 529                 return snprintf(buf, 20, "none\n");                     \
 530         return get_sas_protocol_names(rphy->field, buf);        \
 531 }
 532
 533 #define sas_rphy_protocol_attr(field, name)                             \
 534         sas_rphy_show_protocol(field, name)                             \
 535 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO,                       \
 536                 show_sas_rphy_##name, NULL)
 537
 538 static ssize_t
 539 show_sas_rphy_device_type(struct class_device *cdev, char *buf)
 540 {
 541         struct sas_rphy *rphy = transport_class_to_rphy(cdev);
 542
 543         if (!rphy->identify.device_type)
 544                 return snprintf(buf, 20, "none\n");
 545         return get_sas_device_type_names(
 546                         rphy->identify.device_type, buf);
 547 }
 548
 549 static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
 550                 show_sas_rphy_device_type, NULL);
 551
 552 static ssize_t
 553 show_sas_rphy_enclosure_identifier(struct class_device *cdev, char *buf)
 554 {
 555         struct sas_rphy *rphy = transport_class_to_rphy(cdev);
 556         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
 557         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 558         struct sas_internal *i = to_sas_internal(shost->transportt);
 559         u64 identifier;
 560         int error;
 561
 562         /*
 563          * Only devices behind an expander are supported, because the
 564          * enclosure identifier is a SMP feature.
 565          */
 566         if (phy->local_attached)
 567                 return -EINVAL;
 568
 569         error = i->f->get_enclosure_identifier(rphy, &identifier);
 570         if (error)
 571                 return error;
 572         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
 573 }
 574
 575 static SAS_CLASS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
 576                 show_sas_rphy_enclosure_identifier, NULL);
 577
 578 static ssize_t
 579 show_sas_rphy_bay_identifier(struct class_device *cdev, char *buf)
 580 {
 581         struct sas_rphy *rphy = transport_class_to_rphy(cdev);
 582         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
 583         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 584         struct sas_internal *i = to_sas_internal(shost->transportt);
 585         int val;
 586
 587         if (phy->local_attached)
 588                 return -EINVAL;
 589
 590         val = i->f->get_bay_identifier(rphy);
 591         if (val < 0)
 592                 return val;
 593         return sprintf(buf, "%d\n", val);
 594 }
 595
 596 static SAS_CLASS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
 597                 show_sas_rphy_bay_identifier, NULL);
 598
 599 sas_rphy_protocol_attr(identify.initiator_port_protocols,
 600                 initiator_port_protocols);
 601 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
 602 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 603                 unsigned long long);
 604 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 605
 606 /* only need 8 bytes of data plus header (4 or 8) */
 607 #define BUF_SIZE 64
 608
 609 int sas_read_port_mode_page(struct scsi_device *sdev)
 610 {
 611         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
 612         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 613         struct sas_end_device *rdev;
 614         struct scsi_mode_data mode_data;
 615         int res, error;
 616
 617         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 618
 619         rdev = rphy_to_end_device(rphy);
 620
 621         if (!buffer)
 622                 return -ENOMEM;
 623
 624         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
 625                               &mode_data, NULL);
 626
 627         error = -EINVAL;
 628         if (!scsi_status_is_good(res))
 629                 goto out;
 630
 631         msdata = buffer +  mode_data.header_length +
 632                 mode_data.block_descriptor_length;
 633
 634         if (msdata - buffer > BUF_SIZE - 8)
 635                 goto out;
 636
 637         error = 0;
 638
 639         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
 640         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
 641         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
 642
 643  out:
 644         kfree(buffer);
 645         return error;
 646 }
 647 EXPORT_SYMBOL(sas_read_port_mode_page);
 648
 649 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
 650                                "sas_end_device", NULL, NULL, NULL);
 651
 652 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
 653 static ssize_t                                                          \
 654 show_sas_end_dev_##name(struct class_device *cdev, char *buf)           \
 655 {                                                                       \
 656         struct sas_rphy *rphy = transport_class_to_rphy(cdev);          \
 657         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
 658                                                                         \
 659         return snprintf(buf, 20, format_string, cast rdev->field);      \
 660 }
 661
 662 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
 663         sas_end_dev_show_simple(field, name, format_string, (type))     \
 664 static SAS_CLASS_DEVICE_ATTR(end_dev, name, S_IRUGO,                    \
 665                 show_sas_end_dev_##name, NULL)
 666
 667 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
 668 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
 669                         "%d\n", int);
 670 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
 671                         "%d\n", int);
 672
 673 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
 674                                "sas_expander", NULL, NULL, NULL);
 675
 676 #define sas_expander_show_simple(field, name, format_string, cast)      \
 677 static ssize_t                                                          \
 678 show_sas_expander_##name(struct class_device *cdev, char *buf)          \
 679 {                                                                       \
 680         struct sas_rphy *rphy = transport_class_to_rphy(cdev);          \
 681         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
 682                                                                         \
 683         return snprintf(buf, 20, format_string, cast edev->field);      \
 684 }
 685
 686 #define sas_expander_simple_attr(field, name, format_string, type)      \
 687         sas_expander_show_simple(field, name, format_string, (type))    \
 688 static SAS_CLASS_DEVICE_ATTR(expander, name, S_IRUGO,                   \
 689                 show_sas_expander_##name, NULL)
 690
 691 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
 692 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
 693 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
 694 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
 695                          "%s\n", char *);
 696 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
 697 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
 698                          unsigned int);
 699 sas_expander_simple_attr(level, level, "%d\n", int);
 700
 701 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
 702                 "sas_rphy", NULL, NULL, NULL);
 703
 704 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
 705 {
 706         struct Scsi_Host *shost;
 707         struct sas_internal *i;
 708
 709         if (!scsi_is_sas_rphy(dev))
 710                 return 0;
 711         shost = dev_to_shost(dev->parent->parent);
 712
 713         if (!shost->transportt)
 714                 return 0;
 715         if (shost->transportt->host_attrs.ac.class !=
 716                         &sas_host_class.class)
 717                 return 0;
 718
 719         i = to_sas_internal(shost->transportt);
 720         return &i->rphy_attr_cont.ac == cont;
 721 }
 722
 723 static int sas_end_dev_match(struct attribute_container *cont,
 724                              struct device *dev)
 725 {
 726         struct Scsi_Host *shost;
 727         struct sas_internal *i;
 728         struct sas_rphy *rphy;
 729
 730         if (!scsi_is_sas_rphy(dev))
 731                 return 0;
 732         shost = dev_to_shost(dev->parent->parent);
 733         rphy = dev_to_rphy(dev);
 734
 735         if (!shost->transportt)
 736                 return 0;
 737         if (shost->transportt->host_attrs.ac.class !=
 738                         &sas_host_class.class)
 739                 return 0;
 740
 741         i = to_sas_internal(shost->transportt);
 742         return &i->end_dev_attr_cont.ac == cont &&
 743                 rphy->identify.device_type == SAS_END_DEVICE &&
 744                 /* FIXME: remove contained eventually */
 745                 rphy->contained;
 746 }
 747
 748 static int sas_expander_match(struct attribute_container *cont,
 749                               struct device *dev)
 750 {
 751         struct Scsi_Host *shost;
 752         struct sas_internal *i;
 753         struct sas_rphy *rphy;
 754
 755         if (!scsi_is_sas_rphy(dev))
 756                 return 0;
 757         shost = dev_to_shost(dev->parent->parent);
 758         rphy = dev_to_rphy(dev);
 759
 760         if (!shost->transportt)
 761                 return 0;
 762         if (shost->transportt->host_attrs.ac.class !=
 763                         &sas_host_class.class)
 764                 return 0;
 765
 766         i = to_sas_internal(shost->transportt);
 767         return &i->expander_attr_cont.ac == cont &&
 768                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
 769                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE) &&
 770                 /* FIXME: remove contained eventually */
 771                 rphy->contained;
 772 }
 773
 774 static void sas_rphy_release(struct device *dev)
 775 {
 776         struct sas_rphy *rphy = dev_to_rphy(dev);
 777
 778         put_device(dev->parent);
 779         kfree(rphy);
 780 }
 781
 782 /**
 783  * sas_rphy_alloc  --  allocates and initialize a SAS remote PHY structure
 784  * @parent:             SAS PHY this remote PHY is conneted to
 785  *
 786  * Allocates an SAS remote PHY structure, connected to @parent.
 787  *
 788  * Returns:
 789  *      SAS PHY allocated or %NULL if the allocation failed.
 790  */
 791 struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent)
 792 {
 793         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
 794         struct sas_rphy *rphy;
 795
 796         rphy = kzalloc(sizeof(*rphy), GFP_KERNEL);
 797         if (!rphy) {
 798                 put_device(&parent->dev);
 799                 return NULL;
 800         }
 801
 802         device_initialize(&rphy->dev);
 803         rphy->dev.parent = get_device(&parent->dev);
 804         rphy->dev.release = sas_rphy_release;
 805         sprintf(rphy->dev.bus_id, "rphy-%d:%d-%d",
 806                 shost->host_no, parent->port_identifier, parent->number);
 807         transport_setup_device(&rphy->dev);
 808
 809         return rphy;
 810 }
 811 EXPORT_SYMBOL(sas_rphy_alloc);
 812
 813 /**
 814  * sas_end_device_alloc - allocate an rphy for an end device
 815  *
 816  * Allocates an SAS remote PHY structure, connected to @parent.
 817  *
 818  * Returns:
 819  *      SAS PHY allocated or %NULL if the allocation failed.
 820  */
 821 struct sas_rphy *sas_end_device_alloc(struct sas_phy *parent)
 822 {
 823         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
 824         struct sas_end_device *rdev;
 825
 826         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
 827         if (!rdev) {
 828                 put_device(&parent->dev);
 829                 return NULL;
 830         }
 831
 832         device_initialize(&rdev->rphy.dev);
 833         rdev->rphy.dev.parent = get_device(&parent->dev);
 834         rdev->rphy.dev.release = sas_rphy_release;
 835         sprintf(rdev->rphy.dev.bus_id, "rphy-%d:%d-%d",
 836                 shost->host_no, parent->port_identifier, parent->number);
 837         rdev->rphy.identify.device_type = SAS_END_DEVICE;
 838         /* FIXME: mark the rphy as being contained in a larger structure */
 839         rdev->rphy.contained = 1;
 840         transport_setup_device(&rdev->rphy.dev);
 841
 842         return &rdev->rphy;
 843 }
 844 EXPORT_SYMBOL(sas_end_device_alloc);
 845
 846 /**
 847  * sas_expander_alloc - allocate an rphy for an end device
 848  *
 849  * Allocates an SAS remote PHY structure, connected to @parent.
 850  *
 851  * Returns:
 852  *      SAS PHY allocated or %NULL if the allocation failed.
 853  */
 854 struct sas_rphy *sas_expander_alloc(struct sas_phy *parent,
 855                                     enum sas_device_type type)
 856 {
 857         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
 858         struct sas_expander_device *rdev;
 859         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 860
 861         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
 862                type != SAS_FANOUT_EXPANDER_DEVICE);
 863
 864         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
 865         if (!rdev) {
 866                 put_device(&parent->dev);
 867                 return NULL;
 868         }
 869
 870         device_initialize(&rdev->rphy.dev);
 871         rdev->rphy.dev.parent = get_device(&parent->dev);
 872         rdev->rphy.dev.release = sas_rphy_release;
 873         mutex_lock(&sas_host->lock);
 874         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
 875         mutex_unlock(&sas_host->lock);
 876         sprintf(rdev->rphy.dev.bus_id, "expander-%d:%d",
 877                 shost->host_no, rdev->rphy.scsi_target_id);
 878         rdev->rphy.identify.device_type = type;
 879         /* FIXME: mark the rphy as being contained in a larger structure */
 880         rdev->rphy.contained = 1;
 881         transport_setup_device(&rdev->rphy.dev);
 882
 883         return &rdev->rphy;
 884 }
 885 EXPORT_SYMBOL(sas_expander_alloc);
 886
 887 /**
 888  * sas_rphy_add  --  add a SAS remote PHY to the device hierachy
 889  * @rphy:       The remote PHY to be added
 890  *
 891  * Publishes a SAS remote PHY to the rest of the system.
 892  */
 893 int sas_rphy_add(struct sas_rphy *rphy)
 894 {
 895         struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
 896         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
 897         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 898         struct sas_identify *identify = &rphy->identify;
 899         int error;
 900
 901         if (parent->rphy)
 902                 return -ENXIO;
 903         parent->rphy = rphy;
 904
 905         error = device_add(&rphy->dev);
 906         if (error)
 907                 return error;
 908         transport_add_device(&rphy->dev);
 909         transport_configure_device(&rphy->dev);
 910
 911         mutex_lock(&sas_host->lock);
 912         list_add_tail(&rphy->list, &sas_host->rphy_list);
 913         if (identify->device_type == SAS_END_DEVICE &&
 914             (identify->target_port_protocols &
 915              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
 916                 rphy->scsi_target_id = sas_host->next_target_id++;
 917         mutex_unlock(&sas_host->lock);
 918
 919         if (identify->device_type == SAS_END_DEVICE &&
 920             rphy->scsi_target_id != -1) {
 921                 scsi_scan_target(&rphy->dev, parent->port_identifier,
 922                                 rphy->scsi_target_id, ~0, 0);
 923         }
 924
 925         return 0;
 926 }
 927 EXPORT_SYMBOL(sas_rphy_add);
 928
 929 /**
 930  * sas_rphy_free  --  free a SAS remote PHY
 931  * @rphy        SAS remote PHY to free
 932  *
 933  * Frees the specified SAS remote PHY.
 934  *
 935  * Note:
 936  *   This function must only be called on a remote
 937  *   PHY that has not sucessfully been added using
 938  *   sas_rphy_add().
 939  */
 940 void sas_rphy_free(struct sas_rphy *rphy)
 941 {
 942         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
 943         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 944
 945         mutex_lock(&sas_host->lock);
 946         list_del(&rphy->list);
 947         mutex_unlock(&sas_host->lock);
 948
 949         transport_destroy_device(&rphy->dev);
 950         put_device(rphy->dev.parent);
 951         put_device(rphy->dev.parent);
 952         put_device(rphy->dev.parent);
 953         kfree(rphy);
 954 }
 955 EXPORT_SYMBOL(sas_rphy_free);
 956
 957 /**
 958  * sas_rphy_delete  --  remove SAS remote PHY
 959  * @rphy:       SAS remote PHY to remove
 960  *
 961  * Removes the specified SAS remote PHY.
 962  */
 963 void
 964 sas_rphy_delete(struct sas_rphy *rphy)
 965 {
 966         struct device *dev = &rphy->dev;
 967         struct sas_phy *parent = dev_to_phy(dev->parent);
 968         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
 969         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 970
 971         switch (rphy->identify.device_type) {
 972         case SAS_END_DEVICE:
 973                 scsi_remove_target(dev);
 974                 break;
 975         case SAS_EDGE_EXPANDER_DEVICE:
 976         case SAS_FANOUT_EXPANDER_DEVICE:
 977                 device_for_each_child(dev, NULL, do_sas_phy_delete);
 978                 break;
 979         default:
 980                 break;
 981         }
 982
 983         transport_remove_device(dev);
 984         device_del(dev);
 985         transport_destroy_device(dev);
 986
 987         mutex_lock(&sas_host->lock);
 988         list_del(&rphy->list);
 989         mutex_unlock(&sas_host->lock);
 990
 991         parent->rphy = NULL;
 992
 993         put_device(&parent->dev);
 994 }
 995 EXPORT_SYMBOL(sas_rphy_delete);
 996
 997 /**
 998  * scsi_is_sas_rphy  --  check if a struct device represents a SAS remote PHY
 999  * @dev:        device to check
1000  *
1001  * Returns:
1002  *      %1 if the device represents a SAS remote PHY, %0 else
1003  */
1004 int scsi_is_sas_rphy(const struct device *dev)
1005 {
1006         return dev->release == sas_rphy_release;
1007 }
1008 EXPORT_SYMBOL(scsi_is_sas_rphy);
1009
1010
1011 /*
1012  * SCSI scan helper
1013  */
1014
1015 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1016                 uint id, uint lun)
1017 {
1018         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1019         struct sas_rphy *rphy;
1020
1021         mutex_lock(&sas_host->lock);
1022         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1023                 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
1024
1025                 if (rphy->scsi_target_id == -1)
1026                         continue;
1027
1028                 if ((channel == SCAN_WILD_CARD || channel == parent->port_identifier) &&
1029                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1030                         scsi_scan_target(&rphy->dev, parent->port_identifier,
1031                                          rphy->scsi_target_id, lun, 1);
1032                 }
1033         }
1034         mutex_unlock(&sas_host->lock);
1035
1036         return 0;
1037 }
1038
1039
1040 /*
1041  * Setup / Teardown code
1042  */
1043
1044 #define SETUP_TEMPLATE(attrb, field, perm, test)                                \
1045         i->private_##attrb[count] = class_device_attr_##field;          \
1046         i->private_##attrb[count].attr.mode = perm;                     \
1047         i->private_##attrb[count].store = NULL;                         \
1048         i->attrb[count] = &i->private_##attrb[count];                   \
1049         if (test)                                                       \
1050                 count++
1051
1052
1053 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1054         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1055
1056 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1057         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1058
1059 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1060         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1061
1062 #define SETUP_OPTIONAL_PORT_ATTRIBUTE(field, func)                      \
1063         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1064
1065 #define SETUP_PORT_ATTRIBUTE_WRONLY(field)                              \
1066         SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1)
1067
1068 #define SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(field, func)               \
1069         SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func)
1070
1071 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1072         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1073
1074 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1075         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1076
1077 /**
1078  * sas_attach_transport  --  instantiate SAS transport template
1079  * @ft:         SAS transport class function template
1080  */
1081 struct scsi_transport_template *
1082 sas_attach_transport(struct sas_function_template *ft)
1083 {
1084         struct sas_internal *i;
1085         int count;
1086
1087         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1088         if (!i)
1089                 return NULL;
1090
1091         i->t.user_scan = sas_user_scan;
1092
1093         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1094         i->t.host_attrs.ac.class = &sas_host_class.class;
1095         i->t.host_attrs.ac.match = sas_host_match;
1096         transport_container_register(&i->t.host_attrs);
1097         i->t.host_size = sizeof(struct sas_host_attrs);
1098
1099         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1100         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1101         i->phy_attr_cont.ac.match = sas_phy_match;
1102         transport_container_register(&i->phy_attr_cont);
1103
1104         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1105         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1106         i->rphy_attr_cont.ac.match = sas_rphy_match;
1107         transport_container_register(&i->rphy_attr_cont);
1108
1109         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1110         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1111         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1112         transport_container_register(&i->end_dev_attr_cont);
1113
1114         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1115         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1116         i->expander_attr_cont.ac.match = sas_expander_match;
1117         transport_container_register(&i->expander_attr_cont);
1118
1119         i->f = ft;
1120
1121         count = 0;
1122         i->host_attrs[count] = NULL;
1123
1124         count = 0;
1125         SETUP_PORT_ATTRIBUTE(initiator_port_protocols);
1126         SETUP_PORT_ATTRIBUTE(target_port_protocols);
1127         SETUP_PORT_ATTRIBUTE(device_type);
1128         SETUP_PORT_ATTRIBUTE(sas_address);
1129         SETUP_PORT_ATTRIBUTE(phy_identifier);
1130         SETUP_PORT_ATTRIBUTE(port_identifier);
1131         SETUP_PORT_ATTRIBUTE(negotiated_linkrate);
1132         SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw);
1133         SETUP_PORT_ATTRIBUTE(minimum_linkrate);
1134         SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw);
1135         SETUP_PORT_ATTRIBUTE(maximum_linkrate);
1136
1137         SETUP_PORT_ATTRIBUTE(invalid_dword_count);
1138         SETUP_PORT_ATTRIBUTE(running_disparity_error_count);
1139         SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count);
1140         SETUP_PORT_ATTRIBUTE(phy_reset_problem_count);
1141         SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1142         SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1143         i->phy_attrs[count] = NULL;
1144
1145         count = 0;
1146         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1147         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1148         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1149         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1150         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1151         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1152                                        get_enclosure_identifier);
1153         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1154                                        get_bay_identifier);
1155         i->rphy_attrs[count] = NULL;
1156
1157         count = 0;
1158         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1159         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1160         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1161         i->end_dev_attrs[count] = NULL;
1162
1163         count = 0;
1164         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1165         SETUP_EXPANDER_ATTRIBUTE(product_id);
1166         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1167         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1168         SETUP_EXPANDER_ATTRIBUTE(component_id);
1169         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1170         SETUP_EXPANDER_ATTRIBUTE(level);
1171         i->expander_attrs[count] = NULL;
1172
1173         return &i->t;
1174 }
1175 EXPORT_SYMBOL(sas_attach_transport);
1176
1177 /**
1178  * sas_release_transport  --  release SAS transport template instance
1179  * @t:          transport template instance
1180  */
1181 void sas_release_transport(struct scsi_transport_template *t)
1182 {
1183         struct sas_internal *i = to_sas_internal(t);
1184
1185         transport_container_unregister(&i->t.host_attrs);
1186         transport_container_unregister(&i->phy_attr_cont);
1187         transport_container_unregister(&i->rphy_attr_cont);
1188         transport_container_unregister(&i->end_dev_attr_cont);
1189         transport_container_unregister(&i->expander_attr_cont);
1190
1191         kfree(i);
1192 }
1193 EXPORT_SYMBOL(sas_release_transport);
1194
1195 static __init int sas_transport_init(void)
1196 {
1197         int error;
1198
1199         error = transport_class_register(&sas_host_class);
1200         if (error)
1201                 goto out;
1202         error = transport_class_register(&sas_phy_class);
1203         if (error)
1204                 goto out_unregister_transport;
1205         error = transport_class_register(&sas_rphy_class);
1206         if (error)
1207                 goto out_unregister_phy;
1208         error = transport_class_register(&sas_end_dev_class);
1209         if (error)
1210                 goto out_unregister_rphy;
1211         error = transport_class_register(&sas_expander_class);
1212         if (error)
1213                 goto out_unregister_end_dev;
1214
1215         return 0;
1216
1217  out_unregister_end_dev:
1218         transport_class_unregister(&sas_end_dev_class);
1219  out_unregister_rphy:
1220         transport_class_unregister(&sas_rphy_class);
1221  out_unregister_phy:
1222         transport_class_unregister(&sas_phy_class);
1223  out_unregister_transport:
1224         transport_class_unregister(&sas_host_class);
1225  out:
1226         return error;
1227
1228 }
1229
1230 static void __exit sas_transport_exit(void)
1231 {
1232         transport_class_unregister(&sas_host_class);
1233         transport_class_unregister(&sas_phy_class);
1234         transport_class_unregister(&sas_rphy_class);
1235         transport_class_unregister(&sas_end_dev_class);
1236         transport_class_unregister(&sas_expander_class);
1237 }
1238
1239 MODULE_AUTHOR("Christoph Hellwig");
1240 MODULE_DESCRIPTION("SAS Transphy Attributes");
1241 MODULE_LICENSE("GPL");
1242
1243 module_init(sas_transport_init);
1244 module_exit(sas_transport_exit);