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 management
  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/jiffies.h>
  29 #include <linux/err.h>
  30 #include <linux/slab.h>
  31 #include <linux/string.h>
  32 #include <linux/blkdev.h>
  33 #include <linux/bsg.h>
  34
  35 #include <scsi/scsi.h>
  36 #include <scsi/scsi_cmnd.h>
  37 #include <scsi/scsi_request.h>
  38 #include <scsi/scsi_device.h>
  39 #include <scsi/scsi_host.h>
  40 #include <scsi/scsi_transport.h>
  41 #include <scsi/scsi_transport_sas.h>
  42
  43 #include "scsi_sas_internal.h"
  44 struct sas_host_attrs {
  45         struct list_head rphy_list;
  46         struct mutex lock;
  47         struct request_queue *q;
  48         u32 next_target_id;
  49         u32 next_expander_id;
  50         int next_port_id;
  51 };
  52 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
  53
  54
  55 /*
  56  * Hack to allow attributes of the same name in different objects.
  57  */
  58 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  59         struct device_attribute dev_attr_##_prefix##_##_name = \
  60         __ATTR(_name,_mode,_show,_store)
  61
  62
  63 /*
  64  * Pretty printing helpers
  65  */
  66
  67 #define sas_bitfield_name_match(title, table)                   \
  68 static ssize_t                                                  \
  69 get_sas_##title##_names(u32 table_key, char *buf)               \
  70 {                                                               \
  71         char *prefix = "";                                      \
  72         ssize_t len = 0;                                        \
  73         int i;                                                  \
  74                                                                 \
  75         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  76                 if (table[i].value & table_key) {               \
  77                         len += sprintf(buf + len, "%s%s",       \
  78                                 prefix, table[i].name);         \
  79                         prefix = ", ";                          \
  80                 }                                               \
  81         }                                                       \
  82         len += sprintf(buf + len, "\n");                        \
  83         return len;                                             \
  84 }
  85
  86 #define sas_bitfield_name_set(title, table)                     \
  87 static ssize_t                                                  \
  88 set_sas_##title##_names(u32 *table_key, const char *buf)        \
  89 {                                                               \
  90         ssize_t len = 0;                                        \
  91         int i;                                                  \
  92                                                                 \
  93         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  94                 len = strlen(table[i].name);                    \
  95                 if (strncmp(buf, table[i].name, len) == 0 &&    \
  96                     (buf[len] == '\n' || buf[len] == '\0')) {   \
  97                         *table_key = table[i].value;            \
  98                         return 0;                               \
  99                 }                                               \
 100         }                                                       \
 101         return -EINVAL;                                         \
 102 }
 103
 104 #define sas_bitfield_name_search(title, table)                  \
 105 static ssize_t                                                  \
 106 get_sas_##title##_names(u32 table_key, char *buf)               \
 107 {                                                               \
 108         ssize_t len = 0;                                        \
 109         int i;                                                  \
 110                                                                 \
 111         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 112                 if (table[i].value == table_key) {              \
 113                         len += sprintf(buf + len, "%s",         \
 114                                 table[i].name);                 \
 115                         break;                                  \
 116                 }                                               \
 117         }                                                       \
 118         len += sprintf(buf + len, "\n");                        \
 119         return len;                                             \
 120 }
 121
 122 static struct {
 123         u32             value;
 124         char            *name;
 125 } sas_device_type_names[] = {
 126         { SAS_PHY_UNUSED,               "unused" },
 127         { SAS_END_DEVICE,               "end device" },
 128         { SAS_EDGE_EXPANDER_DEVICE,     "edge expander" },
 129         { SAS_FANOUT_EXPANDER_DEVICE,   "fanout expander" },
 130 };
 131 sas_bitfield_name_search(device_type, sas_device_type_names)
 132
 133
 134 static struct {
 135         u32             value;
 136         char            *name;
 137 } sas_protocol_names[] = {
 138         { SAS_PROTOCOL_SATA,            "sata" },
 139         { SAS_PROTOCOL_SMP,             "smp" },
 140         { SAS_PROTOCOL_STP,             "stp" },
 141         { SAS_PROTOCOL_SSP,             "ssp" },
 142 };
 143 sas_bitfield_name_match(protocol, sas_protocol_names)
 144
 145 static struct {
 146         u32             value;
 147         char            *name;
 148 } sas_linkspeed_names[] = {
 149         { SAS_LINK_RATE_UNKNOWN,        "Unknown" },
 150         { SAS_PHY_DISABLED,             "Phy disabled" },
 151         { SAS_LINK_RATE_FAILED,         "Link Rate failed" },
 152         { SAS_SATA_SPINUP_HOLD,         "Spin-up hold" },
 153         { SAS_LINK_RATE_1_5_GBPS,       "1.5 Gbit" },
 154         { SAS_LINK_RATE_3_0_GBPS,       "3.0 Gbit" },
 155         { SAS_LINK_RATE_6_0_GBPS,       "6.0 Gbit" },
 156         { SAS_LINK_RATE_12_0_GBPS,      "12.0 Gbit" },
 157 };
 158 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 159 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 160
 161 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 162 {
 163         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 164         struct sas_end_device *rdev;
 165
 166         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 167
 168         rdev = rphy_to_end_device(rphy);
 169         return rdev;
 170 }
 171
 172 static int sas_smp_dispatch(struct bsg_job *job)
 173 {
 174         struct Scsi_Host *shost = dev_to_shost(job->dev);
 175         struct sas_rphy *rphy = NULL;
 176
 177         if (!scsi_is_host_device(job->dev))
 178                 rphy = dev_to_rphy(job->dev);
 179
 180         if (!job->reply_payload.payload_len) {
 181                 dev_warn(job->dev, "space for a smp response is missing\n");
 182                 bsg_job_done(job, -EINVAL, 0);
 183                 return 0;
 184         }
 185
 186         to_sas_internal(shost->transportt)->f->smp_handler(job, shost, rphy);
 187         return 0;
 188 }
 189
 190 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 191 {
 192         struct request_queue *q;
 193
 194         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 195                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 196                 return 0;
 197         }
 198
 199         if (rphy) {
 200                 q = bsg_setup_queue(&rphy->dev, dev_name(&rphy->dev),
 201                                 sas_smp_dispatch, 0);
 202                 if (IS_ERR(q))
 203                         return PTR_ERR(q);
 204                 rphy->q = q;
 205         } else {
 206                 char name[20];
 207
 208                 snprintf(name, sizeof(name), "sas_host%d", shost->host_no);
 209                 q = bsg_setup_queue(&shost->shost_gendev, name,
 210                                 sas_smp_dispatch, 0);
 211                 if (IS_ERR(q))
 212                         return PTR_ERR(q);
 213                 to_sas_host_attrs(shost)->q = q;
 214         }
 215
 216         blk_queue_flag_set(QUEUE_FLAG_BIDI, q);
 217         return 0;
 218 }
 219
 220 /*
 221  * SAS host attributes
 222  */
 223
 224 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 225                           struct device *cdev)
 226 {
 227         struct Scsi_Host *shost = dev_to_shost(dev);
 228         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 229
 230         INIT_LIST_HEAD(&sas_host->rphy_list);
 231         mutex_init(&sas_host->lock);
 232         sas_host->next_target_id = 0;
 233         sas_host->next_expander_id = 0;
 234         sas_host->next_port_id = 0;
 235
 236         if (sas_bsg_initialize(shost, NULL))
 237                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 238                            shost->host_no);
 239
 240         return 0;
 241 }
 242
 243 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 244                            struct device *cdev)
 245 {
 246         struct Scsi_Host *shost = dev_to_shost(dev);
 247         struct request_queue *q = to_sas_host_attrs(shost)->q;
 248
 249         if (q) {
 250                 bsg_unregister_queue(q);
 251                 blk_cleanup_queue(q);
 252         }
 253
 254         return 0;
 255 }
 256
 257 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 258                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 259
 260 static int sas_host_match(struct attribute_container *cont,
 261                             struct device *dev)
 262 {
 263         struct Scsi_Host *shost;
 264         struct sas_internal *i;
 265
 266         if (!scsi_is_host_device(dev))
 267                 return 0;
 268         shost = dev_to_shost(dev);
 269
 270         if (!shost->transportt)
 271                 return 0;
 272         if (shost->transportt->host_attrs.ac.class !=
 273                         &sas_host_class.class)
 274                 return 0;
 275
 276         i = to_sas_internal(shost->transportt);
 277         return &i->t.host_attrs.ac == cont;
 278 }
 279
 280 static int do_sas_phy_delete(struct device *dev, void *data)
 281 {
 282         int pass = (int)(unsigned long)data;
 283
 284         if (pass == 0 && scsi_is_sas_port(dev))
 285                 sas_port_delete(dev_to_sas_port(dev));
 286         else if (pass == 1 && scsi_is_sas_phy(dev))
 287                 sas_phy_delete(dev_to_phy(dev));
 288         return 0;
 289 }
 290
 291 /**
 292  * sas_remove_children  -  tear down a devices SAS data structures
 293  * @dev:        device belonging to the sas object
 294  *
 295  * Removes all SAS PHYs and remote PHYs for a given object
 296  */
 297 void sas_remove_children(struct device *dev)
 298 {
 299         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 300         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 301 }
 302 EXPORT_SYMBOL(sas_remove_children);
 303
 304 /**
 305  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 306  * @shost:      Scsi Host that is torn down
 307  *
 308  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
 309  * Scsi_Host as well.
 310  *
 311  * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
 312  * already removed.
 313  */
 314 void sas_remove_host(struct Scsi_Host *shost)
 315 {
 316         sas_remove_children(&shost->shost_gendev);
 317         scsi_remove_host(shost);
 318 }
 319 EXPORT_SYMBOL(sas_remove_host);
 320
 321 /**
 322  * sas_get_address - return the SAS address of the device
 323  * @sdev: scsi device
 324  *
 325  * Returns the SAS address of the scsi device
 326  */
 327 u64 sas_get_address(struct scsi_device *sdev)
 328 {
 329         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 330
 331         return rdev->rphy.identify.sas_address;
 332 }
 333 EXPORT_SYMBOL(sas_get_address);
 334
 335 /**
 336  * sas_tlr_supported - checking TLR bit in vpd 0x90
 337  * @sdev: scsi device struct
 338  *
 339  * Check Transport Layer Retries are supported or not.
 340  * If vpd page 0x90 is present, TRL is supported.
 341  *
 342  */
 343 unsigned int
 344 sas_tlr_supported(struct scsi_device *sdev)
 345 {
 346         const int vpd_len = 32;
 347         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 348         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 349         int ret = 0;
 350
 351         if (!buffer)
 352                 goto out;
 353
 354         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 355                 goto out;
 356
 357         /*
 358          * Magic numbers: the VPD Protocol page (0x90)
 359          * has a 4 byte header and then one entry per device port
 360          * the TLR bit is at offset 8 on each port entry
 361          * if we take the first port, that's at total offset 12
 362          */
 363         ret = buffer[12] & 0x01;
 364
 365  out:
 366         kfree(buffer);
 367         rdev->tlr_supported = ret;
 368         return ret;
 369
 370 }
 371 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 372
 373 /**
 374  * sas_disable_tlr - setting TLR flags
 375  * @sdev: scsi device struct
 376  *
 377  * Seting tlr_enabled flag to 0.
 378  *
 379  */
 380 void
 381 sas_disable_tlr(struct scsi_device *sdev)
 382 {
 383         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 384
 385         rdev->tlr_enabled = 0;
 386 }
 387 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 388
 389 /**
 390  * sas_enable_tlr - setting TLR flags
 391  * @sdev: scsi device struct
 392  *
 393  * Seting tlr_enabled flag 1.
 394  *
 395  */
 396 void sas_enable_tlr(struct scsi_device *sdev)
 397 {
 398         unsigned int tlr_supported = 0;
 399         tlr_supported  = sas_tlr_supported(sdev);
 400
 401         if (tlr_supported) {
 402                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 403
 404                 rdev->tlr_enabled = 1;
 405         }
 406
 407         return;
 408 }
 409 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 410
 411 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 412 {
 413         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 414         return rdev->tlr_enabled;
 415 }
 416 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 417
 418 /*
 419  * SAS Phy attributes
 420  */
 421
 422 #define sas_phy_show_simple(field, name, format_string, cast)           \
 423 static ssize_t                                                          \
 424 show_sas_phy_##name(struct device *dev,                                 \
 425                     struct device_attribute *attr, char *buf)           \
 426 {                                                                       \
 427         struct sas_phy *phy = transport_class_to_phy(dev);              \
 428                                                                         \
 429         return snprintf(buf, 20, format_string, cast phy->field);       \
 430 }
 431
 432 #define sas_phy_simple_attr(field, name, format_string, type)           \
 433         sas_phy_show_simple(field, name, format_string, (type)) \
 434 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 435
 436 #define sas_phy_show_protocol(field, name)                              \
 437 static ssize_t                                                          \
 438 show_sas_phy_##name(struct device *dev,                                 \
 439                     struct device_attribute *attr, char *buf)           \
 440 {                                                                       \
 441         struct sas_phy *phy = transport_class_to_phy(dev);              \
 442                                                                         \
 443         if (!phy->field)                                                \
 444                 return snprintf(buf, 20, "none\n");                     \
 445         return get_sas_protocol_names(phy->field, buf);         \
 446 }
 447
 448 #define sas_phy_protocol_attr(field, name)                              \
 449         sas_phy_show_protocol(field, name)                              \
 450 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 451
 452 #define sas_phy_show_linkspeed(field)                                   \
 453 static ssize_t                                                          \
 454 show_sas_phy_##field(struct device *dev,                                \
 455                      struct device_attribute *attr, char *buf)          \
 456 {                                                                       \
 457         struct sas_phy *phy = transport_class_to_phy(dev);              \
 458                                                                         \
 459         return get_sas_linkspeed_names(phy->field, buf);                \
 460 }
 461
 462 /* Fudge to tell if we're minimum or maximum */
 463 #define sas_phy_store_linkspeed(field)                                  \
 464 static ssize_t                                                          \
 465 store_sas_phy_##field(struct device *dev,                               \
 466                       struct device_attribute *attr,                    \
 467                       const char *buf,  size_t count)                   \
 468 {                                                                       \
 469         struct sas_phy *phy = transport_class_to_phy(dev);              \
 470         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 471         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 472         u32 value;                                                      \
 473         struct sas_phy_linkrates rates = {0};                           \
 474         int error;                                                      \
 475                                                                         \
 476         error = set_sas_linkspeed_names(&value, buf);                   \
 477         if (error)                                                      \
 478                 return error;                                           \
 479         rates.field = value;                                            \
 480         error = i->f->set_phy_speed(phy, &rates);                       \
 481                                                                         \
 482         return error ? error : count;                                   \
 483 }
 484
 485 #define sas_phy_linkspeed_rw_attr(field)                                \
 486         sas_phy_show_linkspeed(field)                                   \
 487         sas_phy_store_linkspeed(field)                                  \
 488 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 489         store_sas_phy_##field)
 490
 491 #define sas_phy_linkspeed_attr(field)                                   \
 492         sas_phy_show_linkspeed(field)                                   \
 493 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 494
 495
 496 #define sas_phy_show_linkerror(field)                                   \
 497 static ssize_t                                                          \
 498 show_sas_phy_##field(struct device *dev,                                \
 499                      struct device_attribute *attr, char *buf)          \
 500 {                                                                       \
 501         struct sas_phy *phy = transport_class_to_phy(dev);              \
 502         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 503         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 504         int error;                                                      \
 505                                                                         \
 506         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 507         if (error)                                                      \
 508                 return error;                                           \
 509         return snprintf(buf, 20, "%u\n", phy->field);                   \
 510 }
 511
 512 #define sas_phy_linkerror_attr(field)                                   \
 513         sas_phy_show_linkerror(field)                                   \
 514 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 515
 516
 517 static ssize_t
 518 show_sas_device_type(struct device *dev,
 519                      struct device_attribute *attr, char *buf)
 520 {
 521         struct sas_phy *phy = transport_class_to_phy(dev);
 522
 523         if (!phy->identify.device_type)
 524                 return snprintf(buf, 20, "none\n");
 525         return get_sas_device_type_names(phy->identify.device_type, buf);
 526 }
 527 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 528
 529 static ssize_t do_sas_phy_enable(struct device *dev,
 530                 size_t count, int enable)
 531 {
 532         struct sas_phy *phy = transport_class_to_phy(dev);
 533         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 534         struct sas_internal *i = to_sas_internal(shost->transportt);
 535         int error;
 536
 537         error = i->f->phy_enable(phy, enable);
 538         if (error)
 539                 return error;
 540         phy->enabled = enable;
 541         return count;
 542 };
 543
 544 static ssize_t
 545 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 546                      const char *buf, size_t count)
 547 {
 548         if (count < 1)
 549                 return -EINVAL;
 550
 551         switch (buf[0]) {
 552         case '0':
 553                 do_sas_phy_enable(dev, count, 0);
 554                 break;
 555         case '1':
 556                 do_sas_phy_enable(dev, count, 1);
 557                 break;
 558         default:
 559                 return -EINVAL;
 560         }
 561
 562         return count;
 563 }
 564
 565 static ssize_t
 566 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 567                     char *buf)
 568 {
 569         struct sas_phy *phy = transport_class_to_phy(dev);
 570
 571         return snprintf(buf, 20, "%d", phy->enabled);
 572 }
 573
 574 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 575                          store_sas_phy_enable);
 576
 577 static ssize_t
 578 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 579 {
 580         struct sas_phy *phy = transport_class_to_phy(dev);
 581         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 582         struct sas_internal *i = to_sas_internal(shost->transportt);
 583         int error;
 584
 585         error = i->f->phy_reset(phy, hard_reset);
 586         if (error)
 587                 return error;
 588         phy->enabled = 1;
 589         return count;
 590 };
 591
 592 static ssize_t
 593 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 594                      const char *buf, size_t count)
 595 {
 596         return do_sas_phy_reset(dev, count, 0);
 597 }
 598 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 599
 600 static ssize_t
 601 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 602                      const char *buf, size_t count)
 603 {
 604         return do_sas_phy_reset(dev, count, 1);
 605 }
 606 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 607
 608 sas_phy_protocol_attr(identify.initiator_port_protocols,
 609                 initiator_port_protocols);
 610 sas_phy_protocol_attr(identify.target_port_protocols,
 611                 target_port_protocols);
 612 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 613                 unsigned long long);
 614 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 615 sas_phy_linkspeed_attr(negotiated_linkrate);
 616 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 617 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 618 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 619 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 620 sas_phy_linkerror_attr(invalid_dword_count);
 621 sas_phy_linkerror_attr(running_disparity_error_count);
 622 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 623 sas_phy_linkerror_attr(phy_reset_problem_count);
 624
 625 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 626                          struct device *cdev)
 627 {
 628         struct sas_phy *phy = dev_to_phy(dev);
 629         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 630         struct sas_internal *i = to_sas_internal(shost->transportt);
 631
 632         if (i->f->phy_setup)
 633                 i->f->phy_setup(phy);
 634
 635         return 0;
 636 }
 637
 638 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 639                 "sas_phy", sas_phy_setup, NULL, NULL);
 640
 641 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 642 {
 643         struct Scsi_Host *shost;
 644         struct sas_internal *i;
 645
 646         if (!scsi_is_sas_phy(dev))
 647                 return 0;
 648         shost = dev_to_shost(dev->parent);
 649
 650         if (!shost->transportt)
 651                 return 0;
 652         if (shost->transportt->host_attrs.ac.class !=
 653                         &sas_host_class.class)
 654                 return 0;
 655
 656         i = to_sas_internal(shost->transportt);
 657         return &i->phy_attr_cont.ac == cont;
 658 }
 659
 660 static void sas_phy_release(struct device *dev)
 661 {
 662         struct sas_phy *phy = dev_to_phy(dev);
 663         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 664         struct sas_internal *i = to_sas_internal(shost->transportt);
 665
 666         if (i->f->phy_release)
 667                 i->f->phy_release(phy);
 668         put_device(dev->parent);
 669         kfree(phy);
 670 }
 671
 672 /**
 673  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 674  * @parent:     Parent device
 675  * @number:     Phy index
 676  *
 677  * Allocates an SAS PHY structure.  It will be added in the device tree
 678  * below the device specified by @parent, which has to be either a Scsi_Host
 679  * or sas_rphy.
 680  *
 681  * Returns:
 682  *      SAS PHY allocated or %NULL if the allocation failed.
 683  */
 684 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 685 {
 686         struct Scsi_Host *shost = dev_to_shost(parent);
 687         struct sas_phy *phy;
 688
 689         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 690         if (!phy)
 691                 return NULL;
 692
 693         phy->number = number;
 694         phy->enabled = 1;
 695
 696         device_initialize(&phy->dev);
 697         phy->dev.parent = get_device(parent);
 698         phy->dev.release = sas_phy_release;
 699         INIT_LIST_HEAD(&phy->port_siblings);
 700         if (scsi_is_sas_expander_device(parent)) {
 701                 struct sas_rphy *rphy = dev_to_rphy(parent);
 702                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 703                         rphy->scsi_target_id, number);
 704         } else
 705                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 706
 707         transport_setup_device(&phy->dev);
 708
 709         return phy;
 710 }
 711 EXPORT_SYMBOL(sas_phy_alloc);
 712
 713 /**
 714  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 715  * @phy:        The PHY to be added
 716  *
 717  * Publishes a SAS PHY to the rest of the system.
 718  */
 719 int sas_phy_add(struct sas_phy *phy)
 720 {
 721         int error;
 722
 723         error = device_add(&phy->dev);
 724         if (!error) {
 725                 transport_add_device(&phy->dev);
 726                 transport_configure_device(&phy->dev);
 727         }
 728
 729         return error;
 730 }
 731 EXPORT_SYMBOL(sas_phy_add);
 732
 733 /**
 734  * sas_phy_free  -  free a SAS PHY
 735  * @phy:        SAS PHY to free
 736  *
 737  * Frees the specified SAS PHY.
 738  *
 739  * Note:
 740  *   This function must only be called on a PHY that has not
 741  *   successfully been added using sas_phy_add().
 742  */
 743 void sas_phy_free(struct sas_phy *phy)
 744 {
 745         transport_destroy_device(&phy->dev);
 746         put_device(&phy->dev);
 747 }
 748 EXPORT_SYMBOL(sas_phy_free);
 749
 750 /**
 751  * sas_phy_delete  -  remove SAS PHY
 752  * @phy:        SAS PHY to remove
 753  *
 754  * Removes the specified SAS PHY.  If the SAS PHY has an
 755  * associated remote PHY it is removed before.
 756  */
 757 void
 758 sas_phy_delete(struct sas_phy *phy)
 759 {
 760         struct device *dev = &phy->dev;
 761
 762         /* this happens if the phy is still part of a port when deleted */
 763         BUG_ON(!list_empty(&phy->port_siblings));
 764
 765         transport_remove_device(dev);
 766         device_del(dev);
 767         transport_destroy_device(dev);
 768         put_device(dev);
 769 }
 770 EXPORT_SYMBOL(sas_phy_delete);
 771
 772 /**
 773  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 774  * @dev:        device to check
 775  *
 776  * Returns:
 777  *      %1 if the device represents a SAS PHY, %0 else
 778  */
 779 int scsi_is_sas_phy(const struct device *dev)
 780 {
 781         return dev->release == sas_phy_release;
 782 }
 783 EXPORT_SYMBOL(scsi_is_sas_phy);
 784
 785 /*
 786  * SAS Port attributes
 787  */
 788 #define sas_port_show_simple(field, name, format_string, cast)          \
 789 static ssize_t                                                          \
 790 show_sas_port_##name(struct device *dev,                                \
 791                      struct device_attribute *attr, char *buf)          \
 792 {                                                                       \
 793         struct sas_port *port = transport_class_to_sas_port(dev);       \
 794                                                                         \
 795         return snprintf(buf, 20, format_string, cast port->field);      \
 796 }
 797
 798 #define sas_port_simple_attr(field, name, format_string, type)          \
 799         sas_port_show_simple(field, name, format_string, (type))        \
 800 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 801
 802 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 803
 804 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 805                                "sas_port", NULL, NULL, NULL);
 806
 807 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 808 {
 809         struct Scsi_Host *shost;
 810         struct sas_internal *i;
 811
 812         if (!scsi_is_sas_port(dev))
 813                 return 0;
 814         shost = dev_to_shost(dev->parent);
 815
 816         if (!shost->transportt)
 817                 return 0;
 818         if (shost->transportt->host_attrs.ac.class !=
 819                         &sas_host_class.class)
 820                 return 0;
 821
 822         i = to_sas_internal(shost->transportt);
 823         return &i->port_attr_cont.ac == cont;
 824 }
 825
 826
 827 static void sas_port_release(struct device *dev)
 828 {
 829         struct sas_port *port = dev_to_sas_port(dev);
 830
 831         BUG_ON(!list_empty(&port->phy_list));
 832
 833         put_device(dev->parent);
 834         kfree(port);
 835 }
 836
 837 static void sas_port_create_link(struct sas_port *port,
 838                                  struct sas_phy *phy)
 839 {
 840         int res;
 841
 842         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 843                                 dev_name(&phy->dev));
 844         if (res)
 845                 goto err;
 846         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 847         if (res)
 848                 goto err;
 849         return;
 850 err:
 851         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 852                __func__, res);
 853 }
 854
 855 static void sas_port_delete_link(struct sas_port *port,
 856                                  struct sas_phy *phy)
 857 {
 858         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 859         sysfs_remove_link(&phy->dev.kobj, "port");
 860 }
 861
 862 /** sas_port_alloc - allocate and initialize a SAS port structure
 863  *
 864  * @parent:     parent device
 865  * @port_id:    port number
 866  *
 867  * Allocates a SAS port structure.  It will be added to the device tree
 868  * below the device specified by @parent which must be either a Scsi_Host
 869  * or a sas_expander_device.
 870  *
 871  * Returns %NULL on error
 872  */
 873 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 874 {
 875         struct Scsi_Host *shost = dev_to_shost(parent);
 876         struct sas_port *port;
 877
 878         port = kzalloc(sizeof(*port), GFP_KERNEL);
 879         if (!port)
 880                 return NULL;
 881
 882         port->port_identifier = port_id;
 883
 884         device_initialize(&port->dev);
 885
 886         port->dev.parent = get_device(parent);
 887         port->dev.release = sas_port_release;
 888
 889         mutex_init(&port->phy_list_mutex);
 890         INIT_LIST_HEAD(&port->phy_list);
 891
 892         if (scsi_is_sas_expander_device(parent)) {
 893                 struct sas_rphy *rphy = dev_to_rphy(parent);
 894                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 895                              rphy->scsi_target_id, port->port_identifier);
 896         } else
 897                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 898                              port->port_identifier);
 899
 900         transport_setup_device(&port->dev);
 901
 902         return port;
 903 }
 904 EXPORT_SYMBOL(sas_port_alloc);
 905
 906 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 907  *
 908  * @parent:     parent device
 909  *
 910  * Allocates a SAS port structure and a number to go with it.  This
 911  * interface is really for adapters where the port number has no
 912  * meansing, so the sas class should manage them.  It will be added to
 913  * the device tree below the device specified by @parent which must be
 914  * either a Scsi_Host or a sas_expander_device.
 915  *
 916  * Returns %NULL on error
 917  */
 918 struct sas_port *sas_port_alloc_num(struct device *parent)
 919 {
 920         int index;
 921         struct Scsi_Host *shost = dev_to_shost(parent);
 922         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 923
 924         /* FIXME: use idr for this eventually */
 925         mutex_lock(&sas_host->lock);
 926         if (scsi_is_sas_expander_device(parent)) {
 927                 struct sas_rphy *rphy = dev_to_rphy(parent);
 928                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 929
 930                 index = exp->next_port_id++;
 931         } else
 932                 index = sas_host->next_port_id++;
 933         mutex_unlock(&sas_host->lock);
 934         return sas_port_alloc(parent, index);
 935 }
 936 EXPORT_SYMBOL(sas_port_alloc_num);
 937
 938 /**
 939  * sas_port_add - add a SAS port to the device hierarchy
 940  * @port:       port to be added
 941  *
 942  * publishes a port to the rest of the system
 943  */
 944 int sas_port_add(struct sas_port *port)
 945 {
 946         int error;
 947
 948         /* No phys should be added until this is made visible */
 949         BUG_ON(!list_empty(&port->phy_list));
 950
 951         error = device_add(&port->dev);
 952
 953         if (error)
 954                 return error;
 955
 956         transport_add_device(&port->dev);
 957         transport_configure_device(&port->dev);
 958
 959         return 0;
 960 }
 961 EXPORT_SYMBOL(sas_port_add);
 962
 963 /**
 964  * sas_port_free  -  free a SAS PORT
 965  * @port:       SAS PORT to free
 966  *
 967  * Frees the specified SAS PORT.
 968  *
 969  * Note:
 970  *   This function must only be called on a PORT that has not
 971  *   successfully been added using sas_port_add().
 972  */
 973 void sas_port_free(struct sas_port *port)
 974 {
 975         transport_destroy_device(&port->dev);
 976         put_device(&port->dev);
 977 }
 978 EXPORT_SYMBOL(sas_port_free);
 979
 980 /**
 981  * sas_port_delete  -  remove SAS PORT
 982  * @port:       SAS PORT to remove
 983  *
 984  * Removes the specified SAS PORT.  If the SAS PORT has an
 985  * associated phys, unlink them from the port as well.
 986  */
 987 void sas_port_delete(struct sas_port *port)
 988 {
 989         struct device *dev = &port->dev;
 990         struct sas_phy *phy, *tmp_phy;
 991
 992         if (port->rphy) {
 993                 sas_rphy_delete(port->rphy);
 994                 port->rphy = NULL;
 995         }
 996
 997         mutex_lock(&port->phy_list_mutex);
 998         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
 999                                  port_siblings) {
1000                 sas_port_delete_link(port, phy);
1001                 list_del_init(&phy->port_siblings);
1002         }
1003         mutex_unlock(&port->phy_list_mutex);
1004
1005         if (port->is_backlink) {
1006                 struct device *parent = port->dev.parent;
1007
1008                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1009                 port->is_backlink = 0;
1010         }
1011
1012         transport_remove_device(dev);
1013         device_del(dev);
1014         transport_destroy_device(dev);
1015         put_device(dev);
1016 }
1017 EXPORT_SYMBOL(sas_port_delete);
1018
1019 /**
1020  * scsi_is_sas_port -  check if a struct device represents a SAS port
1021  * @dev:        device to check
1022  *
1023  * Returns:
1024  *      %1 if the device represents a SAS Port, %0 else
1025  */
1026 int scsi_is_sas_port(const struct device *dev)
1027 {
1028         return dev->release == sas_port_release;
1029 }
1030 EXPORT_SYMBOL(scsi_is_sas_port);
1031
1032 /**
1033  * sas_port_get_phy - try to take a reference on a port member
1034  * @port: port to check
1035  */
1036 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1037 {
1038         struct sas_phy *phy;
1039
1040         mutex_lock(&port->phy_list_mutex);
1041         if (list_empty(&port->phy_list))
1042                 phy = NULL;
1043         else {
1044                 struct list_head *ent = port->phy_list.next;
1045
1046                 phy = list_entry(ent, typeof(*phy), port_siblings);
1047                 get_device(&phy->dev);
1048         }
1049         mutex_unlock(&port->phy_list_mutex);
1050
1051         return phy;
1052 }
1053 EXPORT_SYMBOL(sas_port_get_phy);
1054
1055 /**
1056  * sas_port_add_phy - add another phy to a port to form a wide port
1057  * @port:       port to add the phy to
1058  * @phy:        phy to add
1059  *
1060  * When a port is initially created, it is empty (has no phys).  All
1061  * ports must have at least one phy to operated, and all wide ports
1062  * must have at least two.  The current code makes no difference
1063  * between ports and wide ports, but the only object that can be
1064  * connected to a remote device is a port, so ports must be formed on
1065  * all devices with phys if they're connected to anything.
1066  */
1067 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1068 {
1069         mutex_lock(&port->phy_list_mutex);
1070         if (unlikely(!list_empty(&phy->port_siblings))) {
1071                 /* make sure we're already on this port */
1072                 struct sas_phy *tmp;
1073
1074                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1075                         if (tmp == phy)
1076                                 break;
1077                 /* If this trips, you added a phy that was already
1078                  * part of a different port */
1079                 if (unlikely(tmp != phy)) {
1080                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1081                                    dev_name(&phy->dev));
1082                         BUG();
1083                 }
1084         } else {
1085                 sas_port_create_link(port, phy);
1086                 list_add_tail(&phy->port_siblings, &port->phy_list);
1087                 port->num_phys++;
1088         }
1089         mutex_unlock(&port->phy_list_mutex);
1090 }
1091 EXPORT_SYMBOL(sas_port_add_phy);
1092
1093 /**
1094  * sas_port_delete_phy - remove a phy from a port or wide port
1095  * @port:       port to remove the phy from
1096  * @phy:        phy to remove
1097  *
1098  * This operation is used for tearing down ports again.  It must be
1099  * done to every port or wide port before calling sas_port_delete.
1100  */
1101 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1102 {
1103         mutex_lock(&port->phy_list_mutex);
1104         sas_port_delete_link(port, phy);
1105         list_del_init(&phy->port_siblings);
1106         port->num_phys--;
1107         mutex_unlock(&port->phy_list_mutex);
1108 }
1109 EXPORT_SYMBOL(sas_port_delete_phy);
1110
1111 void sas_port_mark_backlink(struct sas_port *port)
1112 {
1113         int res;
1114         struct device *parent = port->dev.parent->parent->parent;
1115
1116         if (port->is_backlink)
1117                 return;
1118         port->is_backlink = 1;
1119         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1120                                 dev_name(parent));
1121         if (res)
1122                 goto err;
1123         return;
1124 err:
1125         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1126                __func__, res);
1127
1128 }
1129 EXPORT_SYMBOL(sas_port_mark_backlink);
1130
1131 /*
1132  * SAS remote PHY attributes.
1133  */
1134
1135 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1136 static ssize_t                                                          \
1137 show_sas_rphy_##name(struct device *dev,                                \
1138                      struct device_attribute *attr, char *buf)          \
1139 {                                                                       \
1140         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1141                                                                         \
1142         return snprintf(buf, 20, format_string, cast rphy->field);      \
1143 }
1144
1145 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1146         sas_rphy_show_simple(field, name, format_string, (type))        \
1147 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1148                 show_sas_rphy_##name, NULL)
1149
1150 #define sas_rphy_show_protocol(field, name)                             \
1151 static ssize_t                                                          \
1152 show_sas_rphy_##name(struct device *dev,                                \
1153                      struct device_attribute *attr, char *buf)          \
1154 {                                                                       \
1155         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1156                                                                         \
1157         if (!rphy->field)                                       \
1158                 return snprintf(buf, 20, "none\n");                     \
1159         return get_sas_protocol_names(rphy->field, buf);        \
1160 }
1161
1162 #define sas_rphy_protocol_attr(field, name)                             \
1163         sas_rphy_show_protocol(field, name)                             \
1164 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1165                 show_sas_rphy_##name, NULL)
1166
1167 static ssize_t
1168 show_sas_rphy_device_type(struct device *dev,
1169                           struct device_attribute *attr, char *buf)
1170 {
1171         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1172
1173         if (!rphy->identify.device_type)
1174                 return snprintf(buf, 20, "none\n");
1175         return get_sas_device_type_names(
1176                         rphy->identify.device_type, buf);
1177 }
1178
1179 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1180                 show_sas_rphy_device_type, NULL);
1181
1182 static ssize_t
1183 show_sas_rphy_enclosure_identifier(struct device *dev,
1184                                    struct device_attribute *attr, char *buf)
1185 {
1186         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1187         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1188         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1189         struct sas_internal *i = to_sas_internal(shost->transportt);
1190         u64 identifier;
1191         int error;
1192
1193         error = i->f->get_enclosure_identifier(rphy, &identifier);
1194         if (error)
1195                 return error;
1196         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1197 }
1198
1199 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1200                 show_sas_rphy_enclosure_identifier, NULL);
1201
1202 static ssize_t
1203 show_sas_rphy_bay_identifier(struct device *dev,
1204                              struct device_attribute *attr, char *buf)
1205 {
1206         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1207         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1208         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1209         struct sas_internal *i = to_sas_internal(shost->transportt);
1210         int val;
1211
1212         val = i->f->get_bay_identifier(rphy);
1213         if (val < 0)
1214                 return val;
1215         return sprintf(buf, "%d\n", val);
1216 }
1217
1218 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1219                 show_sas_rphy_bay_identifier, NULL);
1220
1221 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1222                 initiator_port_protocols);
1223 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1224 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1225                 unsigned long long);
1226 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1227 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1228
1229 /* only need 8 bytes of data plus header (4 or 8) */
1230 #define BUF_SIZE 64
1231
1232 int sas_read_port_mode_page(struct scsi_device *sdev)
1233 {
1234         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1235         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1236         struct scsi_mode_data mode_data;
1237         int res, error;
1238
1239         if (!buffer)
1240                 return -ENOMEM;
1241
1242         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1243                               &mode_data, NULL);
1244
1245         error = -EINVAL;
1246         if (!scsi_status_is_good(res))
1247                 goto out;
1248
1249         msdata = buffer +  mode_data.header_length +
1250                 mode_data.block_descriptor_length;
1251
1252         if (msdata - buffer > BUF_SIZE - 8)
1253                 goto out;
1254
1255         error = 0;
1256
1257         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1258         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1259         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1260
1261  out:
1262         kfree(buffer);
1263         return error;
1264 }
1265 EXPORT_SYMBOL(sas_read_port_mode_page);
1266
1267 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1268                                "sas_end_device", NULL, NULL, NULL);
1269
1270 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1271 static ssize_t                                                          \
1272 show_sas_end_dev_##name(struct device *dev,                             \
1273                         struct device_attribute *attr, char *buf)       \
1274 {                                                                       \
1275         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1276         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1277                                                                         \
1278         return snprintf(buf, 20, format_string, cast rdev->field);      \
1279 }
1280
1281 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1282         sas_end_dev_show_simple(field, name, format_string, (type))     \
1283 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1284                 show_sas_end_dev_##name, NULL)
1285
1286 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1287 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1288                         "%d\n", int);
1289 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1290                         "%d\n", int);
1291 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1292                         "%d\n", int);
1293 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1294                         "%d\n", int);
1295
1296 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1297                                "sas_expander", NULL, NULL, NULL);
1298
1299 #define sas_expander_show_simple(field, name, format_string, cast)      \
1300 static ssize_t                                                          \
1301 show_sas_expander_##name(struct device *dev,                            \
1302                          struct device_attribute *attr, char *buf)      \
1303 {                                                                       \
1304         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1305         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1306                                                                         \
1307         return snprintf(buf, 20, format_string, cast edev->field);      \
1308 }
1309
1310 #define sas_expander_simple_attr(field, name, format_string, type)      \
1311         sas_expander_show_simple(field, name, format_string, (type))    \
1312 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1313                 show_sas_expander_##name, NULL)
1314
1315 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1316 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1317 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1318 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1319                          "%s\n", char *);
1320 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1321 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1322                          unsigned int);
1323 sas_expander_simple_attr(level, level, "%d\n", int);
1324
1325 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1326                 "sas_device", NULL, NULL, NULL);
1327
1328 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1329 {
1330         struct Scsi_Host *shost;
1331         struct sas_internal *i;
1332
1333         if (!scsi_is_sas_rphy(dev))
1334                 return 0;
1335         shost = dev_to_shost(dev->parent->parent);
1336
1337         if (!shost->transportt)
1338                 return 0;
1339         if (shost->transportt->host_attrs.ac.class !=
1340                         &sas_host_class.class)
1341                 return 0;
1342
1343         i = to_sas_internal(shost->transportt);
1344         return &i->rphy_attr_cont.ac == cont;
1345 }
1346
1347 static int sas_end_dev_match(struct attribute_container *cont,
1348                              struct device *dev)
1349 {
1350         struct Scsi_Host *shost;
1351         struct sas_internal *i;
1352         struct sas_rphy *rphy;
1353
1354         if (!scsi_is_sas_rphy(dev))
1355                 return 0;
1356         shost = dev_to_shost(dev->parent->parent);
1357         rphy = dev_to_rphy(dev);
1358
1359         if (!shost->transportt)
1360                 return 0;
1361         if (shost->transportt->host_attrs.ac.class !=
1362                         &sas_host_class.class)
1363                 return 0;
1364
1365         i = to_sas_internal(shost->transportt);
1366         return &i->end_dev_attr_cont.ac == cont &&
1367                 rphy->identify.device_type == SAS_END_DEVICE;
1368 }
1369
1370 static int sas_expander_match(struct attribute_container *cont,
1371                               struct device *dev)
1372 {
1373         struct Scsi_Host *shost;
1374         struct sas_internal *i;
1375         struct sas_rphy *rphy;
1376
1377         if (!scsi_is_sas_rphy(dev))
1378                 return 0;
1379         shost = dev_to_shost(dev->parent->parent);
1380         rphy = dev_to_rphy(dev);
1381
1382         if (!shost->transportt)
1383                 return 0;
1384         if (shost->transportt->host_attrs.ac.class !=
1385                         &sas_host_class.class)
1386                 return 0;
1387
1388         i = to_sas_internal(shost->transportt);
1389         return &i->expander_attr_cont.ac == cont &&
1390                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1391                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1392 }
1393
1394 static void sas_expander_release(struct device *dev)
1395 {
1396         struct sas_rphy *rphy = dev_to_rphy(dev);
1397         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1398
1399         if (rphy->q)
1400                 blk_cleanup_queue(rphy->q);
1401
1402         put_device(dev->parent);
1403         kfree(edev);
1404 }
1405
1406 static void sas_end_device_release(struct device *dev)
1407 {
1408         struct sas_rphy *rphy = dev_to_rphy(dev);
1409         struct sas_end_device *edev = rphy_to_end_device(rphy);
1410
1411         if (rphy->q)
1412                 blk_cleanup_queue(rphy->q);
1413
1414         put_device(dev->parent);
1415         kfree(edev);
1416 }
1417
1418 /**
1419  * sas_rphy_initialize - common rphy initialization
1420  * @rphy:       rphy to initialise
1421  *
1422  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1423  * initialise the common rphy component of each.
1424  */
1425 static void sas_rphy_initialize(struct sas_rphy *rphy)
1426 {
1427         INIT_LIST_HEAD(&rphy->list);
1428 }
1429
1430 /**
1431  * sas_end_device_alloc - allocate an rphy for an end device
1432  * @parent: which port
1433  *
1434  * Allocates an SAS remote PHY structure, connected to @parent.
1435  *
1436  * Returns:
1437  *      SAS PHY allocated or %NULL if the allocation failed.
1438  */
1439 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1440 {
1441         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1442         struct sas_end_device *rdev;
1443
1444         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1445         if (!rdev) {
1446                 return NULL;
1447         }
1448
1449         device_initialize(&rdev->rphy.dev);
1450         rdev->rphy.dev.parent = get_device(&parent->dev);
1451         rdev->rphy.dev.release = sas_end_device_release;
1452         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1453                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1454                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1455                              shost->host_no, rphy->scsi_target_id,
1456                              parent->port_identifier);
1457         } else
1458                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1459                              shost->host_no, parent->port_identifier);
1460         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1461         sas_rphy_initialize(&rdev->rphy);
1462         transport_setup_device(&rdev->rphy.dev);
1463
1464         return &rdev->rphy;
1465 }
1466 EXPORT_SYMBOL(sas_end_device_alloc);
1467
1468 /**
1469  * sas_expander_alloc - allocate an rphy for an end device
1470  * @parent: which port
1471  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1472  *
1473  * Allocates an SAS remote PHY structure, connected to @parent.
1474  *
1475  * Returns:
1476  *      SAS PHY allocated or %NULL if the allocation failed.
1477  */
1478 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1479                                     enum sas_device_type type)
1480 {
1481         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1482         struct sas_expander_device *rdev;
1483         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1484
1485         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1486                type != SAS_FANOUT_EXPANDER_DEVICE);
1487
1488         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1489         if (!rdev) {
1490                 return NULL;
1491         }
1492
1493         device_initialize(&rdev->rphy.dev);
1494         rdev->rphy.dev.parent = get_device(&parent->dev);
1495         rdev->rphy.dev.release = sas_expander_release;
1496         mutex_lock(&sas_host->lock);
1497         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1498         mutex_unlock(&sas_host->lock);
1499         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1500                      shost->host_no, rdev->rphy.scsi_target_id);
1501         rdev->rphy.identify.device_type = type;
1502         sas_rphy_initialize(&rdev->rphy);
1503         transport_setup_device(&rdev->rphy.dev);
1504
1505         return &rdev->rphy;
1506 }
1507 EXPORT_SYMBOL(sas_expander_alloc);
1508
1509 /**
1510  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1511  * @rphy:       The remote PHY to be added
1512  *
1513  * Publishes a SAS remote PHY to the rest of the system.
1514  */
1515 int sas_rphy_add(struct sas_rphy *rphy)
1516 {
1517         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1518         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1519         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1520         struct sas_identify *identify = &rphy->identify;
1521         int error;
1522
1523         if (parent->rphy)
1524                 return -ENXIO;
1525         parent->rphy = rphy;
1526
1527         error = device_add(&rphy->dev);
1528         if (error)
1529                 return error;
1530         transport_add_device(&rphy->dev);
1531         transport_configure_device(&rphy->dev);
1532         if (sas_bsg_initialize(shost, rphy))
1533                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1534
1535
1536         mutex_lock(&sas_host->lock);
1537         list_add_tail(&rphy->list, &sas_host->rphy_list);
1538         if (identify->device_type == SAS_END_DEVICE &&
1539             (identify->target_port_protocols &
1540              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1541                 rphy->scsi_target_id = sas_host->next_target_id++;
1542         else if (identify->device_type == SAS_END_DEVICE)
1543                 rphy->scsi_target_id = -1;
1544         mutex_unlock(&sas_host->lock);
1545
1546         if (identify->device_type == SAS_END_DEVICE &&
1547             rphy->scsi_target_id != -1) {
1548                 int lun;
1549
1550                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1551                         lun = SCAN_WILD_CARD;
1552                 else
1553                         lun = 0;
1554
1555                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1556                                  SCSI_SCAN_INITIAL);
1557         }
1558
1559         return 0;
1560 }
1561 EXPORT_SYMBOL(sas_rphy_add);
1562
1563 /**
1564  * sas_rphy_free  -  free a SAS remote PHY
1565  * @rphy: SAS remote PHY to free
1566  *
1567  * Frees the specified SAS remote PHY.
1568  *
1569  * Note:
1570  *   This function must only be called on a remote
1571  *   PHY that has not successfully been added using
1572  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1573  */
1574 void sas_rphy_free(struct sas_rphy *rphy)
1575 {
1576         struct device *dev = &rphy->dev;
1577         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1578         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1579
1580         mutex_lock(&sas_host->lock);
1581         list_del(&rphy->list);
1582         mutex_unlock(&sas_host->lock);
1583
1584         transport_destroy_device(dev);
1585
1586         put_device(dev);
1587 }
1588 EXPORT_SYMBOL(sas_rphy_free);
1589
1590 /**
1591  * sas_rphy_delete  -  remove and free SAS remote PHY
1592  * @rphy:       SAS remote PHY to remove and free
1593  *
1594  * Removes the specified SAS remote PHY and frees it.
1595  */
1596 void
1597 sas_rphy_delete(struct sas_rphy *rphy)
1598 {
1599         sas_rphy_remove(rphy);
1600         sas_rphy_free(rphy);
1601 }
1602 EXPORT_SYMBOL(sas_rphy_delete);
1603
1604 /**
1605  * sas_rphy_unlink  -  unlink SAS remote PHY
1606  * @rphy:       SAS remote phy to unlink from its parent port
1607  *
1608  * Removes port reference to an rphy
1609  */
1610 void sas_rphy_unlink(struct sas_rphy *rphy)
1611 {
1612         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1613
1614         parent->rphy = NULL;
1615 }
1616 EXPORT_SYMBOL(sas_rphy_unlink);
1617
1618 /**
1619  * sas_rphy_remove  -  remove SAS remote PHY
1620  * @rphy:       SAS remote phy to remove
1621  *
1622  * Removes the specified SAS remote PHY.
1623  */
1624 void
1625 sas_rphy_remove(struct sas_rphy *rphy)
1626 {
1627         struct device *dev = &rphy->dev;
1628
1629         switch (rphy->identify.device_type) {
1630         case SAS_END_DEVICE:
1631                 scsi_remove_target(dev);
1632                 break;
1633         case SAS_EDGE_EXPANDER_DEVICE:
1634         case SAS_FANOUT_EXPANDER_DEVICE:
1635                 sas_remove_children(dev);
1636                 break;
1637         default:
1638                 break;
1639         }
1640
1641         sas_rphy_unlink(rphy);
1642         if (rphy->q)
1643                 bsg_unregister_queue(rphy->q);
1644         transport_remove_device(dev);
1645         device_del(dev);
1646 }
1647 EXPORT_SYMBOL(sas_rphy_remove);
1648
1649 /**
1650  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1651  * @dev:        device to check
1652  *
1653  * Returns:
1654  *      %1 if the device represents a SAS remote PHY, %0 else
1655  */
1656 int scsi_is_sas_rphy(const struct device *dev)
1657 {
1658         return dev->release == sas_end_device_release ||
1659                 dev->release == sas_expander_release;
1660 }
1661 EXPORT_SYMBOL(scsi_is_sas_rphy);
1662
1663
1664 /*
1665  * SCSI scan helper
1666  */
1667
1668 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1669                 uint id, u64 lun)
1670 {
1671         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1672         struct sas_rphy *rphy;
1673
1674         mutex_lock(&sas_host->lock);
1675         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1676                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1677                     rphy->scsi_target_id == -1)
1678                         continue;
1679
1680                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1681                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1682                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1683                                          lun, SCSI_SCAN_MANUAL);
1684                 }
1685         }
1686         mutex_unlock(&sas_host->lock);
1687
1688         return 0;
1689 }
1690
1691
1692 /*
1693  * Setup / Teardown code
1694  */
1695
1696 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1697         i->private_##attrb[count] = dev_attr_##field;           \
1698         i->private_##attrb[count].attr.mode = perm;                     \
1699         i->attrb[count] = &i->private_##attrb[count];                   \
1700         if (test)                                                       \
1701                 count++
1702
1703 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1704         i->private_##attrb[count] = dev_attr_##field;           \
1705         i->private_##attrb[count].attr.mode = perm;                     \
1706         if (ro_test) {                                                  \
1707                 i->private_##attrb[count].attr.mode = ro_perm;          \
1708                 i->private_##attrb[count].store = NULL;                 \
1709         }                                                               \
1710         i->attrb[count] = &i->private_##attrb[count];                   \
1711         if (test)                                                       \
1712                 count++
1713
1714 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1715         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1716
1717 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1718         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1719
1720 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1721         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1722
1723 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1724         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1725                         !i->f->set_phy_speed, S_IRUGO)
1726
1727 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1728         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1729                           !i->f->func, S_IRUGO)
1730
1731 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1732         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1733
1734 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1735         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1736
1737 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1738         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1739
1740 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1741         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1742
1743 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1744         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1745
1746 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1747         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1748
1749 /**
1750  * sas_attach_transport  -  instantiate SAS transport template
1751  * @ft:         SAS transport class function template
1752  */
1753 struct scsi_transport_template *
1754 sas_attach_transport(struct sas_function_template *ft)
1755 {
1756         struct sas_internal *i;
1757         int count;
1758
1759         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1760         if (!i)
1761                 return NULL;
1762
1763         i->t.user_scan = sas_user_scan;
1764
1765         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1766         i->t.host_attrs.ac.class = &sas_host_class.class;
1767         i->t.host_attrs.ac.match = sas_host_match;
1768         transport_container_register(&i->t.host_attrs);
1769         i->t.host_size = sizeof(struct sas_host_attrs);
1770
1771         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1772         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1773         i->phy_attr_cont.ac.match = sas_phy_match;
1774         transport_container_register(&i->phy_attr_cont);
1775
1776         i->port_attr_cont.ac.class = &sas_port_class.class;
1777         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1778         i->port_attr_cont.ac.match = sas_port_match;
1779         transport_container_register(&i->port_attr_cont);
1780
1781         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1782         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1783         i->rphy_attr_cont.ac.match = sas_rphy_match;
1784         transport_container_register(&i->rphy_attr_cont);
1785
1786         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1787         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1788         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1789         transport_container_register(&i->end_dev_attr_cont);
1790
1791         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1792         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1793         i->expander_attr_cont.ac.match = sas_expander_match;
1794         transport_container_register(&i->expander_attr_cont);
1795
1796         i->f = ft;
1797
1798         count = 0;
1799         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1800         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1801         SETUP_PHY_ATTRIBUTE(device_type);
1802         SETUP_PHY_ATTRIBUTE(sas_address);
1803         SETUP_PHY_ATTRIBUTE(phy_identifier);
1804         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1805         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1806         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1807         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1808         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1809
1810         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1811         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1812         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1813         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1814         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1815         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1816         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1817         i->phy_attrs[count] = NULL;
1818
1819         count = 0;
1820         SETUP_PORT_ATTRIBUTE(num_phys);
1821         i->port_attrs[count] = NULL;
1822
1823         count = 0;
1824         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1825         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1826         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1827         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1828         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1829         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1830         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1831                                        get_enclosure_identifier);
1832         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1833                                        get_bay_identifier);
1834         i->rphy_attrs[count] = NULL;
1835
1836         count = 0;
1837         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1838         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1839         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1840         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1841         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1842         i->end_dev_attrs[count] = NULL;
1843
1844         count = 0;
1845         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1846         SETUP_EXPANDER_ATTRIBUTE(product_id);
1847         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1848         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1849         SETUP_EXPANDER_ATTRIBUTE(component_id);
1850         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1851         SETUP_EXPANDER_ATTRIBUTE(level);
1852         i->expander_attrs[count] = NULL;
1853
1854         return &i->t;
1855 }
1856 EXPORT_SYMBOL(sas_attach_transport);
1857
1858 /**
1859  * sas_release_transport  -  release SAS transport template instance
1860  * @t:          transport template instance
1861  */
1862 void sas_release_transport(struct scsi_transport_template *t)
1863 {
1864         struct sas_internal *i = to_sas_internal(t);
1865
1866         transport_container_unregister(&i->t.host_attrs);
1867         transport_container_unregister(&i->phy_attr_cont);
1868         transport_container_unregister(&i->port_attr_cont);
1869         transport_container_unregister(&i->rphy_attr_cont);
1870         transport_container_unregister(&i->end_dev_attr_cont);
1871         transport_container_unregister(&i->expander_attr_cont);
1872
1873         kfree(i);
1874 }
1875 EXPORT_SYMBOL(sas_release_transport);
1876
1877 static __init int sas_transport_init(void)
1878 {
1879         int error;
1880
1881         error = transport_class_register(&sas_host_class);
1882         if (error)
1883                 goto out;
1884         error = transport_class_register(&sas_phy_class);
1885         if (error)
1886                 goto out_unregister_transport;
1887         error = transport_class_register(&sas_port_class);
1888         if (error)
1889                 goto out_unregister_phy;
1890         error = transport_class_register(&sas_rphy_class);
1891         if (error)
1892                 goto out_unregister_port;
1893         error = transport_class_register(&sas_end_dev_class);
1894         if (error)
1895                 goto out_unregister_rphy;
1896         error = transport_class_register(&sas_expander_class);
1897         if (error)
1898                 goto out_unregister_end_dev;
1899
1900         return 0;
1901
1902  out_unregister_end_dev:
1903         transport_class_unregister(&sas_end_dev_class);
1904  out_unregister_rphy:
1905         transport_class_unregister(&sas_rphy_class);
1906  out_unregister_port:
1907         transport_class_unregister(&sas_port_class);
1908  out_unregister_phy:
1909         transport_class_unregister(&sas_phy_class);
1910  out_unregister_transport:
1911         transport_class_unregister(&sas_host_class);
1912  out:
1913         return error;
1914
1915 }
1916
1917 static void __exit sas_transport_exit(void)
1918 {
1919         transport_class_unregister(&sas_host_class);
1920         transport_class_unregister(&sas_phy_class);
1921         transport_class_unregister(&sas_port_class);
1922         transport_class_unregister(&sas_rphy_class);
1923         transport_class_unregister(&sas_end_dev_class);
1924         transport_class_unregister(&sas_expander_class);
1925 }
1926
1927 MODULE_AUTHOR("Christoph Hellwig");
1928 MODULE_DESCRIPTION("SAS Transport Attributes");
1929 MODULE_LICENSE("GPL");
1930
1931 module_init(sas_transport_init);
1932 module_exit(sas_transport_exit);