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_simple_attr(port_identifier, port_identifier, "%d\n", int);
 616 sas_phy_linkspeed_attr(negotiated_linkrate);
 617 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 618 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 619 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 620 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 621 sas_phy_linkerror_attr(invalid_dword_count);
 622 sas_phy_linkerror_attr(running_disparity_error_count);
 623 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 624 sas_phy_linkerror_attr(phy_reset_problem_count);
 625
 626 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 627                          struct device *cdev)
 628 {
 629         struct sas_phy *phy = dev_to_phy(dev);
 630         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 631         struct sas_internal *i = to_sas_internal(shost->transportt);
 632
 633         if (i->f->phy_setup)
 634                 i->f->phy_setup(phy);
 635
 636         return 0;
 637 }
 638
 639 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 640                 "sas_phy", sas_phy_setup, NULL, NULL);
 641
 642 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 643 {
 644         struct Scsi_Host *shost;
 645         struct sas_internal *i;
 646
 647         if (!scsi_is_sas_phy(dev))
 648                 return 0;
 649         shost = dev_to_shost(dev->parent);
 650
 651         if (!shost->transportt)
 652                 return 0;
 653         if (shost->transportt->host_attrs.ac.class !=
 654                         &sas_host_class.class)
 655                 return 0;
 656
 657         i = to_sas_internal(shost->transportt);
 658         return &i->phy_attr_cont.ac == cont;
 659 }
 660
 661 static void sas_phy_release(struct device *dev)
 662 {
 663         struct sas_phy *phy = dev_to_phy(dev);
 664         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 665         struct sas_internal *i = to_sas_internal(shost->transportt);
 666
 667         if (i->f->phy_release)
 668                 i->f->phy_release(phy);
 669         put_device(dev->parent);
 670         kfree(phy);
 671 }
 672
 673 /**
 674  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 675  * @parent:     Parent device
 676  * @number:     Phy index
 677  *
 678  * Allocates an SAS PHY structure.  It will be added in the device tree
 679  * below the device specified by @parent, which has to be either a Scsi_Host
 680  * or sas_rphy.
 681  *
 682  * Returns:
 683  *      SAS PHY allocated or %NULL if the allocation failed.
 684  */
 685 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 686 {
 687         struct Scsi_Host *shost = dev_to_shost(parent);
 688         struct sas_phy *phy;
 689
 690         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 691         if (!phy)
 692                 return NULL;
 693
 694         phy->number = number;
 695         phy->enabled = 1;
 696
 697         device_initialize(&phy->dev);
 698         phy->dev.parent = get_device(parent);
 699         phy->dev.release = sas_phy_release;
 700         INIT_LIST_HEAD(&phy->port_siblings);
 701         if (scsi_is_sas_expander_device(parent)) {
 702                 struct sas_rphy *rphy = dev_to_rphy(parent);
 703                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 704                         rphy->scsi_target_id, number);
 705         } else
 706                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 707
 708         transport_setup_device(&phy->dev);
 709
 710         return phy;
 711 }
 712 EXPORT_SYMBOL(sas_phy_alloc);
 713
 714 /**
 715  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 716  * @phy:        The PHY to be added
 717  *
 718  * Publishes a SAS PHY to the rest of the system.
 719  */
 720 int sas_phy_add(struct sas_phy *phy)
 721 {
 722         int error;
 723
 724         error = device_add(&phy->dev);
 725         if (!error) {
 726                 transport_add_device(&phy->dev);
 727                 transport_configure_device(&phy->dev);
 728         }
 729
 730         return error;
 731 }
 732 EXPORT_SYMBOL(sas_phy_add);
 733
 734 /**
 735  * sas_phy_free  -  free a SAS PHY
 736  * @phy:        SAS PHY to free
 737  *
 738  * Frees the specified SAS PHY.
 739  *
 740  * Note:
 741  *   This function must only be called on a PHY that has not
 742  *   successfully been added using sas_phy_add().
 743  */
 744 void sas_phy_free(struct sas_phy *phy)
 745 {
 746         transport_destroy_device(&phy->dev);
 747         put_device(&phy->dev);
 748 }
 749 EXPORT_SYMBOL(sas_phy_free);
 750
 751 /**
 752  * sas_phy_delete  -  remove SAS PHY
 753  * @phy:        SAS PHY to remove
 754  *
 755  * Removes the specified SAS PHY.  If the SAS PHY has an
 756  * associated remote PHY it is removed before.
 757  */
 758 void
 759 sas_phy_delete(struct sas_phy *phy)
 760 {
 761         struct device *dev = &phy->dev;
 762
 763         /* this happens if the phy is still part of a port when deleted */
 764         BUG_ON(!list_empty(&phy->port_siblings));
 765
 766         transport_remove_device(dev);
 767         device_del(dev);
 768         transport_destroy_device(dev);
 769         put_device(dev);
 770 }
 771 EXPORT_SYMBOL(sas_phy_delete);
 772
 773 /**
 774  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 775  * @dev:        device to check
 776  *
 777  * Returns:
 778  *      %1 if the device represents a SAS PHY, %0 else
 779  */
 780 int scsi_is_sas_phy(const struct device *dev)
 781 {
 782         return dev->release == sas_phy_release;
 783 }
 784 EXPORT_SYMBOL(scsi_is_sas_phy);
 785
 786 /*
 787  * SAS Port attributes
 788  */
 789 #define sas_port_show_simple(field, name, format_string, cast)          \
 790 static ssize_t                                                          \
 791 show_sas_port_##name(struct device *dev,                                \
 792                      struct device_attribute *attr, char *buf)          \
 793 {                                                                       \
 794         struct sas_port *port = transport_class_to_sas_port(dev);       \
 795                                                                         \
 796         return snprintf(buf, 20, format_string, cast port->field);      \
 797 }
 798
 799 #define sas_port_simple_attr(field, name, format_string, type)          \
 800         sas_port_show_simple(field, name, format_string, (type))        \
 801 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 802
 803 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 804
 805 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 806                                "sas_port", NULL, NULL, NULL);
 807
 808 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 809 {
 810         struct Scsi_Host *shost;
 811         struct sas_internal *i;
 812
 813         if (!scsi_is_sas_port(dev))
 814                 return 0;
 815         shost = dev_to_shost(dev->parent);
 816
 817         if (!shost->transportt)
 818                 return 0;
 819         if (shost->transportt->host_attrs.ac.class !=
 820                         &sas_host_class.class)
 821                 return 0;
 822
 823         i = to_sas_internal(shost->transportt);
 824         return &i->port_attr_cont.ac == cont;
 825 }
 826
 827
 828 static void sas_port_release(struct device *dev)
 829 {
 830         struct sas_port *port = dev_to_sas_port(dev);
 831
 832         BUG_ON(!list_empty(&port->phy_list));
 833
 834         put_device(dev->parent);
 835         kfree(port);
 836 }
 837
 838 static void sas_port_create_link(struct sas_port *port,
 839                                  struct sas_phy *phy)
 840 {
 841         int res;
 842
 843         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 844                                 dev_name(&phy->dev));
 845         if (res)
 846                 goto err;
 847         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 848         if (res)
 849                 goto err;
 850         return;
 851 err:
 852         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 853                __func__, res);
 854 }
 855
 856 static void sas_port_delete_link(struct sas_port *port,
 857                                  struct sas_phy *phy)
 858 {
 859         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 860         sysfs_remove_link(&phy->dev.kobj, "port");
 861 }
 862
 863 /** sas_port_alloc - allocate and initialize a SAS port structure
 864  *
 865  * @parent:     parent device
 866  * @port_id:    port number
 867  *
 868  * Allocates a SAS port structure.  It will be added to the device tree
 869  * below the device specified by @parent which must be either a Scsi_Host
 870  * or a sas_expander_device.
 871  *
 872  * Returns %NULL on error
 873  */
 874 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 875 {
 876         struct Scsi_Host *shost = dev_to_shost(parent);
 877         struct sas_port *port;
 878
 879         port = kzalloc(sizeof(*port), GFP_KERNEL);
 880         if (!port)
 881                 return NULL;
 882
 883         port->port_identifier = port_id;
 884
 885         device_initialize(&port->dev);
 886
 887         port->dev.parent = get_device(parent);
 888         port->dev.release = sas_port_release;
 889
 890         mutex_init(&port->phy_list_mutex);
 891         INIT_LIST_HEAD(&port->phy_list);
 892
 893         if (scsi_is_sas_expander_device(parent)) {
 894                 struct sas_rphy *rphy = dev_to_rphy(parent);
 895                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 896                              rphy->scsi_target_id, port->port_identifier);
 897         } else
 898                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 899                              port->port_identifier);
 900
 901         transport_setup_device(&port->dev);
 902
 903         return port;
 904 }
 905 EXPORT_SYMBOL(sas_port_alloc);
 906
 907 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 908  *
 909  * @parent:     parent device
 910  *
 911  * Allocates a SAS port structure and a number to go with it.  This
 912  * interface is really for adapters where the port number has no
 913  * meansing, so the sas class should manage them.  It will be added to
 914  * the device tree below the device specified by @parent which must be
 915  * either a Scsi_Host or a sas_expander_device.
 916  *
 917  * Returns %NULL on error
 918  */
 919 struct sas_port *sas_port_alloc_num(struct device *parent)
 920 {
 921         int index;
 922         struct Scsi_Host *shost = dev_to_shost(parent);
 923         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 924
 925         /* FIXME: use idr for this eventually */
 926         mutex_lock(&sas_host->lock);
 927         if (scsi_is_sas_expander_device(parent)) {
 928                 struct sas_rphy *rphy = dev_to_rphy(parent);
 929                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 930
 931                 index = exp->next_port_id++;
 932         } else
 933                 index = sas_host->next_port_id++;
 934         mutex_unlock(&sas_host->lock);
 935         return sas_port_alloc(parent, index);
 936 }
 937 EXPORT_SYMBOL(sas_port_alloc_num);
 938
 939 /**
 940  * sas_port_add - add a SAS port to the device hierarchy
 941  * @port:       port to be added
 942  *
 943  * publishes a port to the rest of the system
 944  */
 945 int sas_port_add(struct sas_port *port)
 946 {
 947         int error;
 948
 949         /* No phys should be added until this is made visible */
 950         BUG_ON(!list_empty(&port->phy_list));
 951
 952         error = device_add(&port->dev);
 953
 954         if (error)
 955                 return error;
 956
 957         transport_add_device(&port->dev);
 958         transport_configure_device(&port->dev);
 959
 960         return 0;
 961 }
 962 EXPORT_SYMBOL(sas_port_add);
 963
 964 /**
 965  * sas_port_free  -  free a SAS PORT
 966  * @port:       SAS PORT to free
 967  *
 968  * Frees the specified SAS PORT.
 969  *
 970  * Note:
 971  *   This function must only be called on a PORT that has not
 972  *   successfully been added using sas_port_add().
 973  */
 974 void sas_port_free(struct sas_port *port)
 975 {
 976         transport_destroy_device(&port->dev);
 977         put_device(&port->dev);
 978 }
 979 EXPORT_SYMBOL(sas_port_free);
 980
 981 /**
 982  * sas_port_delete  -  remove SAS PORT
 983  * @port:       SAS PORT to remove
 984  *
 985  * Removes the specified SAS PORT.  If the SAS PORT has an
 986  * associated phys, unlink them from the port as well.
 987  */
 988 void sas_port_delete(struct sas_port *port)
 989 {
 990         struct device *dev = &port->dev;
 991         struct sas_phy *phy, *tmp_phy;
 992
 993         if (port->rphy) {
 994                 sas_rphy_delete(port->rphy);
 995                 port->rphy = NULL;
 996         }
 997
 998         mutex_lock(&port->phy_list_mutex);
 999         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1000                                  port_siblings) {
1001                 sas_port_delete_link(port, phy);
1002                 list_del_init(&phy->port_siblings);
1003         }
1004         mutex_unlock(&port->phy_list_mutex);
1005
1006         if (port->is_backlink) {
1007                 struct device *parent = port->dev.parent;
1008
1009                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1010                 port->is_backlink = 0;
1011         }
1012
1013         transport_remove_device(dev);
1014         device_del(dev);
1015         transport_destroy_device(dev);
1016         put_device(dev);
1017 }
1018 EXPORT_SYMBOL(sas_port_delete);
1019
1020 /**
1021  * scsi_is_sas_port -  check if a struct device represents a SAS port
1022  * @dev:        device to check
1023  *
1024  * Returns:
1025  *      %1 if the device represents a SAS Port, %0 else
1026  */
1027 int scsi_is_sas_port(const struct device *dev)
1028 {
1029         return dev->release == sas_port_release;
1030 }
1031 EXPORT_SYMBOL(scsi_is_sas_port);
1032
1033 /**
1034  * sas_port_get_phy - try to take a reference on a port member
1035  * @port: port to check
1036  */
1037 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1038 {
1039         struct sas_phy *phy;
1040
1041         mutex_lock(&port->phy_list_mutex);
1042         if (list_empty(&port->phy_list))
1043                 phy = NULL;
1044         else {
1045                 struct list_head *ent = port->phy_list.next;
1046
1047                 phy = list_entry(ent, typeof(*phy), port_siblings);
1048                 get_device(&phy->dev);
1049         }
1050         mutex_unlock(&port->phy_list_mutex);
1051
1052         return phy;
1053 }
1054 EXPORT_SYMBOL(sas_port_get_phy);
1055
1056 /**
1057  * sas_port_add_phy - add another phy to a port to form a wide port
1058  * @port:       port to add the phy to
1059  * @phy:        phy to add
1060  *
1061  * When a port is initially created, it is empty (has no phys).  All
1062  * ports must have at least one phy to operated, and all wide ports
1063  * must have at least two.  The current code makes no difference
1064  * between ports and wide ports, but the only object that can be
1065  * connected to a remote device is a port, so ports must be formed on
1066  * all devices with phys if they're connected to anything.
1067  */
1068 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1069 {
1070         mutex_lock(&port->phy_list_mutex);
1071         if (unlikely(!list_empty(&phy->port_siblings))) {
1072                 /* make sure we're already on this port */
1073                 struct sas_phy *tmp;
1074
1075                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1076                         if (tmp == phy)
1077                                 break;
1078                 /* If this trips, you added a phy that was already
1079                  * part of a different port */
1080                 if (unlikely(tmp != phy)) {
1081                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1082                                    dev_name(&phy->dev));
1083                         BUG();
1084                 }
1085         } else {
1086                 sas_port_create_link(port, phy);
1087                 list_add_tail(&phy->port_siblings, &port->phy_list);
1088                 port->num_phys++;
1089         }
1090         mutex_unlock(&port->phy_list_mutex);
1091 }
1092 EXPORT_SYMBOL(sas_port_add_phy);
1093
1094 /**
1095  * sas_port_delete_phy - remove a phy from a port or wide port
1096  * @port:       port to remove the phy from
1097  * @phy:        phy to remove
1098  *
1099  * This operation is used for tearing down ports again.  It must be
1100  * done to every port or wide port before calling sas_port_delete.
1101  */
1102 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1103 {
1104         mutex_lock(&port->phy_list_mutex);
1105         sas_port_delete_link(port, phy);
1106         list_del_init(&phy->port_siblings);
1107         port->num_phys--;
1108         mutex_unlock(&port->phy_list_mutex);
1109 }
1110 EXPORT_SYMBOL(sas_port_delete_phy);
1111
1112 void sas_port_mark_backlink(struct sas_port *port)
1113 {
1114         int res;
1115         struct device *parent = port->dev.parent->parent->parent;
1116
1117         if (port->is_backlink)
1118                 return;
1119         port->is_backlink = 1;
1120         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1121                                 dev_name(parent));
1122         if (res)
1123                 goto err;
1124         return;
1125 err:
1126         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1127                __func__, res);
1128
1129 }
1130 EXPORT_SYMBOL(sas_port_mark_backlink);
1131
1132 /*
1133  * SAS remote PHY attributes.
1134  */
1135
1136 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1137 static ssize_t                                                          \
1138 show_sas_rphy_##name(struct device *dev,                                \
1139                      struct device_attribute *attr, char *buf)          \
1140 {                                                                       \
1141         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1142                                                                         \
1143         return snprintf(buf, 20, format_string, cast rphy->field);      \
1144 }
1145
1146 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1147         sas_rphy_show_simple(field, name, format_string, (type))        \
1148 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1149                 show_sas_rphy_##name, NULL)
1150
1151 #define sas_rphy_show_protocol(field, name)                             \
1152 static ssize_t                                                          \
1153 show_sas_rphy_##name(struct device *dev,                                \
1154                      struct device_attribute *attr, char *buf)          \
1155 {                                                                       \
1156         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1157                                                                         \
1158         if (!rphy->field)                                       \
1159                 return snprintf(buf, 20, "none\n");                     \
1160         return get_sas_protocol_names(rphy->field, buf);        \
1161 }
1162
1163 #define sas_rphy_protocol_attr(field, name)                             \
1164         sas_rphy_show_protocol(field, name)                             \
1165 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1166                 show_sas_rphy_##name, NULL)
1167
1168 static ssize_t
1169 show_sas_rphy_device_type(struct device *dev,
1170                           struct device_attribute *attr, char *buf)
1171 {
1172         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1173
1174         if (!rphy->identify.device_type)
1175                 return snprintf(buf, 20, "none\n");
1176         return get_sas_device_type_names(
1177                         rphy->identify.device_type, buf);
1178 }
1179
1180 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1181                 show_sas_rphy_device_type, NULL);
1182
1183 static ssize_t
1184 show_sas_rphy_enclosure_identifier(struct device *dev,
1185                                    struct device_attribute *attr, char *buf)
1186 {
1187         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1188         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1189         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1190         struct sas_internal *i = to_sas_internal(shost->transportt);
1191         u64 identifier;
1192         int error;
1193
1194         error = i->f->get_enclosure_identifier(rphy, &identifier);
1195         if (error)
1196                 return error;
1197         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1198 }
1199
1200 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1201                 show_sas_rphy_enclosure_identifier, NULL);
1202
1203 static ssize_t
1204 show_sas_rphy_bay_identifier(struct device *dev,
1205                              struct device_attribute *attr, char *buf)
1206 {
1207         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1208         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1209         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1210         struct sas_internal *i = to_sas_internal(shost->transportt);
1211         int val;
1212
1213         val = i->f->get_bay_identifier(rphy);
1214         if (val < 0)
1215                 return val;
1216         return sprintf(buf, "%d\n", val);
1217 }
1218
1219 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1220                 show_sas_rphy_bay_identifier, NULL);
1221
1222 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1223                 initiator_port_protocols);
1224 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1225 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1226                 unsigned long long);
1227 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1228 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1229
1230 /* only need 8 bytes of data plus header (4 or 8) */
1231 #define BUF_SIZE 64
1232
1233 int sas_read_port_mode_page(struct scsi_device *sdev)
1234 {
1235         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1236         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1237         struct scsi_mode_data mode_data;
1238         int res, error;
1239
1240         if (!buffer)
1241                 return -ENOMEM;
1242
1243         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1244                               &mode_data, NULL);
1245
1246         error = -EINVAL;
1247         if (!scsi_status_is_good(res))
1248                 goto out;
1249
1250         msdata = buffer +  mode_data.header_length +
1251                 mode_data.block_descriptor_length;
1252
1253         if (msdata - buffer > BUF_SIZE - 8)
1254                 goto out;
1255
1256         error = 0;
1257
1258         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1259         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1260         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1261
1262  out:
1263         kfree(buffer);
1264         return error;
1265 }
1266 EXPORT_SYMBOL(sas_read_port_mode_page);
1267
1268 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1269                                "sas_end_device", NULL, NULL, NULL);
1270
1271 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1272 static ssize_t                                                          \
1273 show_sas_end_dev_##name(struct device *dev,                             \
1274                         struct device_attribute *attr, char *buf)       \
1275 {                                                                       \
1276         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1277         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1278                                                                         \
1279         return snprintf(buf, 20, format_string, cast rdev->field);      \
1280 }
1281
1282 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1283         sas_end_dev_show_simple(field, name, format_string, (type))     \
1284 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1285                 show_sas_end_dev_##name, NULL)
1286
1287 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1288 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1289                         "%d\n", int);
1290 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1291                         "%d\n", int);
1292 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1293                         "%d\n", int);
1294 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1295                         "%d\n", int);
1296
1297 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1298                                "sas_expander", NULL, NULL, NULL);
1299
1300 #define sas_expander_show_simple(field, name, format_string, cast)      \
1301 static ssize_t                                                          \
1302 show_sas_expander_##name(struct device *dev,                            \
1303                          struct device_attribute *attr, char *buf)      \
1304 {                                                                       \
1305         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1306         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1307                                                                         \
1308         return snprintf(buf, 20, format_string, cast edev->field);      \
1309 }
1310
1311 #define sas_expander_simple_attr(field, name, format_string, type)      \
1312         sas_expander_show_simple(field, name, format_string, (type))    \
1313 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1314                 show_sas_expander_##name, NULL)
1315
1316 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1317 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1318 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1319 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1320                          "%s\n", char *);
1321 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1322 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1323                          unsigned int);
1324 sas_expander_simple_attr(level, level, "%d\n", int);
1325
1326 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1327                 "sas_device", NULL, NULL, NULL);
1328
1329 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1330 {
1331         struct Scsi_Host *shost;
1332         struct sas_internal *i;
1333
1334         if (!scsi_is_sas_rphy(dev))
1335                 return 0;
1336         shost = dev_to_shost(dev->parent->parent);
1337
1338         if (!shost->transportt)
1339                 return 0;
1340         if (shost->transportt->host_attrs.ac.class !=
1341                         &sas_host_class.class)
1342                 return 0;
1343
1344         i = to_sas_internal(shost->transportt);
1345         return &i->rphy_attr_cont.ac == cont;
1346 }
1347
1348 static int sas_end_dev_match(struct attribute_container *cont,
1349                              struct device *dev)
1350 {
1351         struct Scsi_Host *shost;
1352         struct sas_internal *i;
1353         struct sas_rphy *rphy;
1354
1355         if (!scsi_is_sas_rphy(dev))
1356                 return 0;
1357         shost = dev_to_shost(dev->parent->parent);
1358         rphy = dev_to_rphy(dev);
1359
1360         if (!shost->transportt)
1361                 return 0;
1362         if (shost->transportt->host_attrs.ac.class !=
1363                         &sas_host_class.class)
1364                 return 0;
1365
1366         i = to_sas_internal(shost->transportt);
1367         return &i->end_dev_attr_cont.ac == cont &&
1368                 rphy->identify.device_type == SAS_END_DEVICE;
1369 }
1370
1371 static int sas_expander_match(struct attribute_container *cont,
1372                               struct device *dev)
1373 {
1374         struct Scsi_Host *shost;
1375         struct sas_internal *i;
1376         struct sas_rphy *rphy;
1377
1378         if (!scsi_is_sas_rphy(dev))
1379                 return 0;
1380         shost = dev_to_shost(dev->parent->parent);
1381         rphy = dev_to_rphy(dev);
1382
1383         if (!shost->transportt)
1384                 return 0;
1385         if (shost->transportt->host_attrs.ac.class !=
1386                         &sas_host_class.class)
1387                 return 0;
1388
1389         i = to_sas_internal(shost->transportt);
1390         return &i->expander_attr_cont.ac == cont &&
1391                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1392                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1393 }
1394
1395 static void sas_expander_release(struct device *dev)
1396 {
1397         struct sas_rphy *rphy = dev_to_rphy(dev);
1398         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1399
1400         if (rphy->q)
1401                 blk_cleanup_queue(rphy->q);
1402
1403         put_device(dev->parent);
1404         kfree(edev);
1405 }
1406
1407 static void sas_end_device_release(struct device *dev)
1408 {
1409         struct sas_rphy *rphy = dev_to_rphy(dev);
1410         struct sas_end_device *edev = rphy_to_end_device(rphy);
1411
1412         if (rphy->q)
1413                 blk_cleanup_queue(rphy->q);
1414
1415         put_device(dev->parent);
1416         kfree(edev);
1417 }
1418
1419 /**
1420  * sas_rphy_initialize - common rphy initialization
1421  * @rphy:       rphy to initialise
1422  *
1423  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1424  * initialise the common rphy component of each.
1425  */
1426 static void sas_rphy_initialize(struct sas_rphy *rphy)
1427 {
1428         INIT_LIST_HEAD(&rphy->list);
1429 }
1430
1431 /**
1432  * sas_end_device_alloc - allocate an rphy for an end device
1433  * @parent: which port
1434  *
1435  * Allocates an SAS remote PHY structure, connected to @parent.
1436  *
1437  * Returns:
1438  *      SAS PHY allocated or %NULL if the allocation failed.
1439  */
1440 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1441 {
1442         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1443         struct sas_end_device *rdev;
1444
1445         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1446         if (!rdev) {
1447                 return NULL;
1448         }
1449
1450         device_initialize(&rdev->rphy.dev);
1451         rdev->rphy.dev.parent = get_device(&parent->dev);
1452         rdev->rphy.dev.release = sas_end_device_release;
1453         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1454                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1455                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1456                              shost->host_no, rphy->scsi_target_id,
1457                              parent->port_identifier);
1458         } else
1459                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1460                              shost->host_no, parent->port_identifier);
1461         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1462         sas_rphy_initialize(&rdev->rphy);
1463         transport_setup_device(&rdev->rphy.dev);
1464
1465         return &rdev->rphy;
1466 }
1467 EXPORT_SYMBOL(sas_end_device_alloc);
1468
1469 /**
1470  * sas_expander_alloc - allocate an rphy for an end device
1471  * @parent: which port
1472  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1473  *
1474  * Allocates an SAS remote PHY structure, connected to @parent.
1475  *
1476  * Returns:
1477  *      SAS PHY allocated or %NULL if the allocation failed.
1478  */
1479 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1480                                     enum sas_device_type type)
1481 {
1482         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1483         struct sas_expander_device *rdev;
1484         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1485
1486         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1487                type != SAS_FANOUT_EXPANDER_DEVICE);
1488
1489         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1490         if (!rdev) {
1491                 return NULL;
1492         }
1493
1494         device_initialize(&rdev->rphy.dev);
1495         rdev->rphy.dev.parent = get_device(&parent->dev);
1496         rdev->rphy.dev.release = sas_expander_release;
1497         mutex_lock(&sas_host->lock);
1498         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1499         mutex_unlock(&sas_host->lock);
1500         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1501                      shost->host_no, rdev->rphy.scsi_target_id);
1502         rdev->rphy.identify.device_type = type;
1503         sas_rphy_initialize(&rdev->rphy);
1504         transport_setup_device(&rdev->rphy.dev);
1505
1506         return &rdev->rphy;
1507 }
1508 EXPORT_SYMBOL(sas_expander_alloc);
1509
1510 /**
1511  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1512  * @rphy:       The remote PHY to be added
1513  *
1514  * Publishes a SAS remote PHY to the rest of the system.
1515  */
1516 int sas_rphy_add(struct sas_rphy *rphy)
1517 {
1518         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1519         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1520         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1521         struct sas_identify *identify = &rphy->identify;
1522         int error;
1523
1524         if (parent->rphy)
1525                 return -ENXIO;
1526         parent->rphy = rphy;
1527
1528         error = device_add(&rphy->dev);
1529         if (error)
1530                 return error;
1531         transport_add_device(&rphy->dev);
1532         transport_configure_device(&rphy->dev);
1533         if (sas_bsg_initialize(shost, rphy))
1534                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1535
1536
1537         mutex_lock(&sas_host->lock);
1538         list_add_tail(&rphy->list, &sas_host->rphy_list);
1539         if (identify->device_type == SAS_END_DEVICE &&
1540             (identify->target_port_protocols &
1541              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1542                 rphy->scsi_target_id = sas_host->next_target_id++;
1543         else if (identify->device_type == SAS_END_DEVICE)
1544                 rphy->scsi_target_id = -1;
1545         mutex_unlock(&sas_host->lock);
1546
1547         if (identify->device_type == SAS_END_DEVICE &&
1548             rphy->scsi_target_id != -1) {
1549                 int lun;
1550
1551                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1552                         lun = SCAN_WILD_CARD;
1553                 else
1554                         lun = 0;
1555
1556                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1557                                  SCSI_SCAN_INITIAL);
1558         }
1559
1560         return 0;
1561 }
1562 EXPORT_SYMBOL(sas_rphy_add);
1563
1564 /**
1565  * sas_rphy_free  -  free a SAS remote PHY
1566  * @rphy: SAS remote PHY to free
1567  *
1568  * Frees the specified SAS remote PHY.
1569  *
1570  * Note:
1571  *   This function must only be called on a remote
1572  *   PHY that has not successfully been added using
1573  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1574  */
1575 void sas_rphy_free(struct sas_rphy *rphy)
1576 {
1577         struct device *dev = &rphy->dev;
1578         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1579         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1580
1581         mutex_lock(&sas_host->lock);
1582         list_del(&rphy->list);
1583         mutex_unlock(&sas_host->lock);
1584
1585         transport_destroy_device(dev);
1586
1587         put_device(dev);
1588 }
1589 EXPORT_SYMBOL(sas_rphy_free);
1590
1591 /**
1592  * sas_rphy_delete  -  remove and free SAS remote PHY
1593  * @rphy:       SAS remote PHY to remove and free
1594  *
1595  * Removes the specified SAS remote PHY and frees it.
1596  */
1597 void
1598 sas_rphy_delete(struct sas_rphy *rphy)
1599 {
1600         sas_rphy_remove(rphy);
1601         sas_rphy_free(rphy);
1602 }
1603 EXPORT_SYMBOL(sas_rphy_delete);
1604
1605 /**
1606  * sas_rphy_unlink  -  unlink SAS remote PHY
1607  * @rphy:       SAS remote phy to unlink from its parent port
1608  *
1609  * Removes port reference to an rphy
1610  */
1611 void sas_rphy_unlink(struct sas_rphy *rphy)
1612 {
1613         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1614
1615         parent->rphy = NULL;
1616 }
1617 EXPORT_SYMBOL(sas_rphy_unlink);
1618
1619 /**
1620  * sas_rphy_remove  -  remove SAS remote PHY
1621  * @rphy:       SAS remote phy to remove
1622  *
1623  * Removes the specified SAS remote PHY.
1624  */
1625 void
1626 sas_rphy_remove(struct sas_rphy *rphy)
1627 {
1628         struct device *dev = &rphy->dev;
1629
1630         switch (rphy->identify.device_type) {
1631         case SAS_END_DEVICE:
1632                 scsi_remove_target(dev);
1633                 break;
1634         case SAS_EDGE_EXPANDER_DEVICE:
1635         case SAS_FANOUT_EXPANDER_DEVICE:
1636                 sas_remove_children(dev);
1637                 break;
1638         default:
1639                 break;
1640         }
1641
1642         sas_rphy_unlink(rphy);
1643         if (rphy->q)
1644                 bsg_unregister_queue(rphy->q);
1645         transport_remove_device(dev);
1646         device_del(dev);
1647 }
1648 EXPORT_SYMBOL(sas_rphy_remove);
1649
1650 /**
1651  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1652  * @dev:        device to check
1653  *
1654  * Returns:
1655  *      %1 if the device represents a SAS remote PHY, %0 else
1656  */
1657 int scsi_is_sas_rphy(const struct device *dev)
1658 {
1659         return dev->release == sas_end_device_release ||
1660                 dev->release == sas_expander_release;
1661 }
1662 EXPORT_SYMBOL(scsi_is_sas_rphy);
1663
1664
1665 /*
1666  * SCSI scan helper
1667  */
1668
1669 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1670                 uint id, u64 lun)
1671 {
1672         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1673         struct sas_rphy *rphy;
1674
1675         mutex_lock(&sas_host->lock);
1676         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1677                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1678                     rphy->scsi_target_id == -1)
1679                         continue;
1680
1681                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1682                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1683                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1684                                          lun, SCSI_SCAN_MANUAL);
1685                 }
1686         }
1687         mutex_unlock(&sas_host->lock);
1688
1689         return 0;
1690 }
1691
1692
1693 /*
1694  * Setup / Teardown code
1695  */
1696
1697 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1698         i->private_##attrb[count] = dev_attr_##field;           \
1699         i->private_##attrb[count].attr.mode = perm;                     \
1700         i->attrb[count] = &i->private_##attrb[count];                   \
1701         if (test)                                                       \
1702                 count++
1703
1704 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1705         i->private_##attrb[count] = dev_attr_##field;           \
1706         i->private_##attrb[count].attr.mode = perm;                     \
1707         if (ro_test) {                                                  \
1708                 i->private_##attrb[count].attr.mode = ro_perm;          \
1709                 i->private_##attrb[count].store = NULL;                 \
1710         }                                                               \
1711         i->attrb[count] = &i->private_##attrb[count];                   \
1712         if (test)                                                       \
1713                 count++
1714
1715 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1716         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1717
1718 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1719         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1720
1721 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1722         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1723
1724 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1725         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1726                         !i->f->set_phy_speed, S_IRUGO)
1727
1728 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1729         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1730                           !i->f->func, S_IRUGO)
1731
1732 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1733         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1734
1735 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1736         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1737
1738 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1739         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1740
1741 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1742         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1743
1744 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1745         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1746
1747 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1748         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1749
1750 /**
1751  * sas_attach_transport  -  instantiate SAS transport template
1752  * @ft:         SAS transport class function template
1753  */
1754 struct scsi_transport_template *
1755 sas_attach_transport(struct sas_function_template *ft)
1756 {
1757         struct sas_internal *i;
1758         int count;
1759
1760         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1761         if (!i)
1762                 return NULL;
1763
1764         i->t.user_scan = sas_user_scan;
1765
1766         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1767         i->t.host_attrs.ac.class = &sas_host_class.class;
1768         i->t.host_attrs.ac.match = sas_host_match;
1769         transport_container_register(&i->t.host_attrs);
1770         i->t.host_size = sizeof(struct sas_host_attrs);
1771
1772         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1773         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1774         i->phy_attr_cont.ac.match = sas_phy_match;
1775         transport_container_register(&i->phy_attr_cont);
1776
1777         i->port_attr_cont.ac.class = &sas_port_class.class;
1778         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1779         i->port_attr_cont.ac.match = sas_port_match;
1780         transport_container_register(&i->port_attr_cont);
1781
1782         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1783         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1784         i->rphy_attr_cont.ac.match = sas_rphy_match;
1785         transport_container_register(&i->rphy_attr_cont);
1786
1787         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1788         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1789         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1790         transport_container_register(&i->end_dev_attr_cont);
1791
1792         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1793         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1794         i->expander_attr_cont.ac.match = sas_expander_match;
1795         transport_container_register(&i->expander_attr_cont);
1796
1797         i->f = ft;
1798
1799         count = 0;
1800         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1801         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1802         SETUP_PHY_ATTRIBUTE(device_type);
1803         SETUP_PHY_ATTRIBUTE(sas_address);
1804         SETUP_PHY_ATTRIBUTE(phy_identifier);
1805         //SETUP_PHY_ATTRIBUTE(port_identifier);
1806         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1807         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1808         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1809         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1810         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1811
1812         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1813         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1814         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1815         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1816         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1817         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1818         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1819         i->phy_attrs[count] = NULL;
1820
1821         count = 0;
1822         SETUP_PORT_ATTRIBUTE(num_phys);
1823         i->port_attrs[count] = NULL;
1824
1825         count = 0;
1826         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1827         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1828         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1829         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1830         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1831         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1832         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1833                                        get_enclosure_identifier);
1834         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1835                                        get_bay_identifier);
1836         i->rphy_attrs[count] = NULL;
1837
1838         count = 0;
1839         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1840         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1841         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1842         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1843         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1844         i->end_dev_attrs[count] = NULL;
1845
1846         count = 0;
1847         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1848         SETUP_EXPANDER_ATTRIBUTE(product_id);
1849         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1850         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1851         SETUP_EXPANDER_ATTRIBUTE(component_id);
1852         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1853         SETUP_EXPANDER_ATTRIBUTE(level);
1854         i->expander_attrs[count] = NULL;
1855
1856         return &i->t;
1857 }
1858 EXPORT_SYMBOL(sas_attach_transport);
1859
1860 /**
1861  * sas_release_transport  -  release SAS transport template instance
1862  * @t:          transport template instance
1863  */
1864 void sas_release_transport(struct scsi_transport_template *t)
1865 {
1866         struct sas_internal *i = to_sas_internal(t);
1867
1868         transport_container_unregister(&i->t.host_attrs);
1869         transport_container_unregister(&i->phy_attr_cont);
1870         transport_container_unregister(&i->port_attr_cont);
1871         transport_container_unregister(&i->rphy_attr_cont);
1872         transport_container_unregister(&i->end_dev_attr_cont);
1873         transport_container_unregister(&i->expander_attr_cont);
1874
1875         kfree(i);
1876 }
1877 EXPORT_SYMBOL(sas_release_transport);
1878
1879 static __init int sas_transport_init(void)
1880 {
1881         int error;
1882
1883         error = transport_class_register(&sas_host_class);
1884         if (error)
1885                 goto out;
1886         error = transport_class_register(&sas_phy_class);
1887         if (error)
1888                 goto out_unregister_transport;
1889         error = transport_class_register(&sas_port_class);
1890         if (error)
1891                 goto out_unregister_phy;
1892         error = transport_class_register(&sas_rphy_class);
1893         if (error)
1894                 goto out_unregister_port;
1895         error = transport_class_register(&sas_end_dev_class);
1896         if (error)
1897                 goto out_unregister_rphy;
1898         error = transport_class_register(&sas_expander_class);
1899         if (error)
1900                 goto out_unregister_end_dev;
1901
1902         return 0;
1903
1904  out_unregister_end_dev:
1905         transport_class_unregister(&sas_end_dev_class);
1906  out_unregister_rphy:
1907         transport_class_unregister(&sas_rphy_class);
1908  out_unregister_port:
1909         transport_class_unregister(&sas_port_class);
1910  out_unregister_phy:
1911         transport_class_unregister(&sas_phy_class);
1912  out_unregister_transport:
1913         transport_class_unregister(&sas_host_class);
1914  out:
1915         return error;
1916
1917 }
1918
1919 static void __exit sas_transport_exit(void)
1920 {
1921         transport_class_unregister(&sas_host_class);
1922         transport_class_unregister(&sas_phy_class);
1923         transport_class_unregister(&sas_port_class);
1924         transport_class_unregister(&sas_rphy_class);
1925         transport_class_unregister(&sas_end_dev_class);
1926         transport_class_unregister(&sas_expander_class);
1927 }
1928
1929 MODULE_AUTHOR("Christoph Hellwig");
1930 MODULE_DESCRIPTION("SAS Transport Attributes");
1931 MODULE_LICENSE("GPL");
1932
1933 module_init(sas_transport_init);
1934 module_exit(sas_transport_exit);