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 void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
 173                             struct sas_rphy *rphy)
 174 {
 175         struct request *req;
 176         blk_status_t ret;
 177         int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 178
 179         while ((req = blk_fetch_request(q)) != NULL) {
 180                 spin_unlock_irq(q->queue_lock);
 181
 182                 scsi_req(req)->resid_len = blk_rq_bytes(req);
 183                 if (req->next_rq)
 184                         scsi_req(req->next_rq)->resid_len =
 185                                 blk_rq_bytes(req->next_rq);
 186                 handler = to_sas_internal(shost->transportt)->f->smp_handler;
 187                 ret = handler(shost, rphy, req);
 188                 scsi_req(req)->result = ret;
 189
 190                 blk_end_request_all(req, 0);
 191
 192                 spin_lock_irq(q->queue_lock);
 193         }
 194 }
 195
 196 static void sas_host_smp_request(struct request_queue *q)
 197 {
 198         sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
 199 }
 200
 201 static void sas_non_host_smp_request(struct request_queue *q)
 202 {
 203         struct sas_rphy *rphy = q->queuedata;
 204         sas_smp_request(q, rphy_to_shost(rphy), rphy);
 205 }
 206
 207 static void sas_host_release(struct device *dev)
 208 {
 209         struct Scsi_Host *shost = dev_to_shost(dev);
 210         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 211         struct request_queue *q = sas_host->q;
 212
 213         if (q)
 214                 blk_cleanup_queue(q);
 215 }
 216
 217 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 218 {
 219         struct request_queue *q;
 220         int error;
 221         struct device *dev;
 222         char namebuf[20];
 223         const char *name;
 224         void (*release)(struct device *);
 225
 226         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 227                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 228                 return 0;
 229         }
 230
 231         q = blk_alloc_queue(GFP_KERNEL);
 232         if (!q)
 233                 return -ENOMEM;
 234         q->initialize_rq_fn = scsi_initialize_rq;
 235         q->cmd_size = sizeof(struct scsi_request);
 236
 237         if (rphy) {
 238                 q->request_fn = sas_non_host_smp_request;
 239                 dev = &rphy->dev;
 240                 name = dev_name(dev);
 241                 release = NULL;
 242         } else {
 243                 q->request_fn = sas_host_smp_request;
 244                 dev = &shost->shost_gendev;
 245                 snprintf(namebuf, sizeof(namebuf),
 246                          "sas_host%d", shost->host_no);
 247                 name = namebuf;
 248                 release = sas_host_release;
 249         }
 250         error = blk_init_allocated_queue(q);
 251         if (error)
 252                 goto out_cleanup_queue;
 253
 254         /*
 255          * by default assume old behaviour and bounce for any highmem page
 256          */
 257         blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH);
 258
 259         error = bsg_register_queue(q, dev, name, release);
 260         if (error)
 261                 goto out_cleanup_queue;
 262
 263         if (rphy)
 264                 rphy->q = q;
 265         else
 266                 to_sas_host_attrs(shost)->q = q;
 267
 268         if (rphy)
 269                 q->queuedata = rphy;
 270         else
 271                 q->queuedata = shost;
 272
 273         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
 274         queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
 275         return 0;
 276
 277 out_cleanup_queue:
 278         blk_cleanup_queue(q);
 279         return error;
 280 }
 281
 282 static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
 283 {
 284         struct request_queue *q;
 285
 286         if (rphy)
 287                 q = rphy->q;
 288         else
 289                 q = to_sas_host_attrs(shost)->q;
 290
 291         if (!q)
 292                 return;
 293
 294         bsg_unregister_queue(q);
 295 }
 296
 297 /*
 298  * SAS host attributes
 299  */
 300
 301 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 302                           struct device *cdev)
 303 {
 304         struct Scsi_Host *shost = dev_to_shost(dev);
 305         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 306
 307         INIT_LIST_HEAD(&sas_host->rphy_list);
 308         mutex_init(&sas_host->lock);
 309         sas_host->next_target_id = 0;
 310         sas_host->next_expander_id = 0;
 311         sas_host->next_port_id = 0;
 312
 313         if (sas_bsg_initialize(shost, NULL))
 314                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 315                            shost->host_no);
 316
 317         return 0;
 318 }
 319
 320 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 321                            struct device *cdev)
 322 {
 323         struct Scsi_Host *shost = dev_to_shost(dev);
 324
 325         sas_bsg_remove(shost, NULL);
 326
 327         return 0;
 328 }
 329
 330 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 331                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 332
 333 static int sas_host_match(struct attribute_container *cont,
 334                             struct device *dev)
 335 {
 336         struct Scsi_Host *shost;
 337         struct sas_internal *i;
 338
 339         if (!scsi_is_host_device(dev))
 340                 return 0;
 341         shost = dev_to_shost(dev);
 342
 343         if (!shost->transportt)
 344                 return 0;
 345         if (shost->transportt->host_attrs.ac.class !=
 346                         &sas_host_class.class)
 347                 return 0;
 348
 349         i = to_sas_internal(shost->transportt);
 350         return &i->t.host_attrs.ac == cont;
 351 }
 352
 353 static int do_sas_phy_delete(struct device *dev, void *data)
 354 {
 355         int pass = (int)(unsigned long)data;
 356
 357         if (pass == 0 && scsi_is_sas_port(dev))
 358                 sas_port_delete(dev_to_sas_port(dev));
 359         else if (pass == 1 && scsi_is_sas_phy(dev))
 360                 sas_phy_delete(dev_to_phy(dev));
 361         return 0;
 362 }
 363
 364 /**
 365  * sas_remove_children  -  tear down a devices SAS data structures
 366  * @dev:        device belonging to the sas object
 367  *
 368  * Removes all SAS PHYs and remote PHYs for a given object
 369  */
 370 void sas_remove_children(struct device *dev)
 371 {
 372         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 373         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 374 }
 375 EXPORT_SYMBOL(sas_remove_children);
 376
 377 /**
 378  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 379  * @shost:      Scsi Host that is torn down
 380  *
 381  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
 382  * Scsi_Host as well.
 383  *
 384  * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
 385  * already removed.
 386  */
 387 void sas_remove_host(struct Scsi_Host *shost)
 388 {
 389         sas_remove_children(&shost->shost_gendev);
 390         scsi_remove_host(shost);
 391 }
 392 EXPORT_SYMBOL(sas_remove_host);
 393
 394 /**
 395  * sas_get_address - return the SAS address of the device
 396  * @sdev: scsi device
 397  *
 398  * Returns the SAS address of the scsi device
 399  */
 400 u64 sas_get_address(struct scsi_device *sdev)
 401 {
 402         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 403
 404         return rdev->rphy.identify.sas_address;
 405 }
 406 EXPORT_SYMBOL(sas_get_address);
 407
 408 /**
 409  * sas_tlr_supported - checking TLR bit in vpd 0x90
 410  * @sdev: scsi device struct
 411  *
 412  * Check Transport Layer Retries are supported or not.
 413  * If vpd page 0x90 is present, TRL is supported.
 414  *
 415  */
 416 unsigned int
 417 sas_tlr_supported(struct scsi_device *sdev)
 418 {
 419         const int vpd_len = 32;
 420         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 421         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 422         int ret = 0;
 423
 424         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 425                 goto out;
 426
 427         /*
 428          * Magic numbers: the VPD Protocol page (0x90)
 429          * has a 4 byte header and then one entry per device port
 430          * the TLR bit is at offset 8 on each port entry
 431          * if we take the first port, that's at total offset 12
 432          */
 433         ret = buffer[12] & 0x01;
 434
 435  out:
 436         kfree(buffer);
 437         rdev->tlr_supported = ret;
 438         return ret;
 439
 440 }
 441 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 442
 443 /**
 444  * sas_disable_tlr - setting TLR flags
 445  * @sdev: scsi device struct
 446  *
 447  * Seting tlr_enabled flag to 0.
 448  *
 449  */
 450 void
 451 sas_disable_tlr(struct scsi_device *sdev)
 452 {
 453         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 454
 455         rdev->tlr_enabled = 0;
 456 }
 457 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 458
 459 /**
 460  * sas_enable_tlr - setting TLR flags
 461  * @sdev: scsi device struct
 462  *
 463  * Seting tlr_enabled flag 1.
 464  *
 465  */
 466 void sas_enable_tlr(struct scsi_device *sdev)
 467 {
 468         unsigned int tlr_supported = 0;
 469         tlr_supported  = sas_tlr_supported(sdev);
 470
 471         if (tlr_supported) {
 472                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 473
 474                 rdev->tlr_enabled = 1;
 475         }
 476
 477         return;
 478 }
 479 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 480
 481 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 482 {
 483         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 484         return rdev->tlr_enabled;
 485 }
 486 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 487
 488 /*
 489  * SAS Phy attributes
 490  */
 491
 492 #define sas_phy_show_simple(field, name, format_string, cast)           \
 493 static ssize_t                                                          \
 494 show_sas_phy_##name(struct device *dev,                                 \
 495                     struct device_attribute *attr, char *buf)           \
 496 {                                                                       \
 497         struct sas_phy *phy = transport_class_to_phy(dev);              \
 498                                                                         \
 499         return snprintf(buf, 20, format_string, cast phy->field);       \
 500 }
 501
 502 #define sas_phy_simple_attr(field, name, format_string, type)           \
 503         sas_phy_show_simple(field, name, format_string, (type)) \
 504 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 505
 506 #define sas_phy_show_protocol(field, name)                              \
 507 static ssize_t                                                          \
 508 show_sas_phy_##name(struct device *dev,                                 \
 509                     struct device_attribute *attr, char *buf)           \
 510 {                                                                       \
 511         struct sas_phy *phy = transport_class_to_phy(dev);              \
 512                                                                         \
 513         if (!phy->field)                                                \
 514                 return snprintf(buf, 20, "none\n");                     \
 515         return get_sas_protocol_names(phy->field, buf);         \
 516 }
 517
 518 #define sas_phy_protocol_attr(field, name)                              \
 519         sas_phy_show_protocol(field, name)                              \
 520 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 521
 522 #define sas_phy_show_linkspeed(field)                                   \
 523 static ssize_t                                                          \
 524 show_sas_phy_##field(struct device *dev,                                \
 525                      struct device_attribute *attr, char *buf)          \
 526 {                                                                       \
 527         struct sas_phy *phy = transport_class_to_phy(dev);              \
 528                                                                         \
 529         return get_sas_linkspeed_names(phy->field, buf);                \
 530 }
 531
 532 /* Fudge to tell if we're minimum or maximum */
 533 #define sas_phy_store_linkspeed(field)                                  \
 534 static ssize_t                                                          \
 535 store_sas_phy_##field(struct device *dev,                               \
 536                       struct device_attribute *attr,                    \
 537                       const char *buf,  size_t count)                   \
 538 {                                                                       \
 539         struct sas_phy *phy = transport_class_to_phy(dev);              \
 540         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 541         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 542         u32 value;                                                      \
 543         struct sas_phy_linkrates rates = {0};                           \
 544         int error;                                                      \
 545                                                                         \
 546         error = set_sas_linkspeed_names(&value, buf);                   \
 547         if (error)                                                      \
 548                 return error;                                           \
 549         rates.field = value;                                            \
 550         error = i->f->set_phy_speed(phy, &rates);                       \
 551                                                                         \
 552         return error ? error : count;                                   \
 553 }
 554
 555 #define sas_phy_linkspeed_rw_attr(field)                                \
 556         sas_phy_show_linkspeed(field)                                   \
 557         sas_phy_store_linkspeed(field)                                  \
 558 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 559         store_sas_phy_##field)
 560
 561 #define sas_phy_linkspeed_attr(field)                                   \
 562         sas_phy_show_linkspeed(field)                                   \
 563 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 564
 565
 566 #define sas_phy_show_linkerror(field)                                   \
 567 static ssize_t                                                          \
 568 show_sas_phy_##field(struct device *dev,                                \
 569                      struct device_attribute *attr, char *buf)          \
 570 {                                                                       \
 571         struct sas_phy *phy = transport_class_to_phy(dev);              \
 572         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 573         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 574         int error;                                                      \
 575                                                                         \
 576         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 577         if (error)                                                      \
 578                 return error;                                           \
 579         return snprintf(buf, 20, "%u\n", phy->field);                   \
 580 }
 581
 582 #define sas_phy_linkerror_attr(field)                                   \
 583         sas_phy_show_linkerror(field)                                   \
 584 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 585
 586
 587 static ssize_t
 588 show_sas_device_type(struct device *dev,
 589                      struct device_attribute *attr, char *buf)
 590 {
 591         struct sas_phy *phy = transport_class_to_phy(dev);
 592
 593         if (!phy->identify.device_type)
 594                 return snprintf(buf, 20, "none\n");
 595         return get_sas_device_type_names(phy->identify.device_type, buf);
 596 }
 597 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 598
 599 static ssize_t do_sas_phy_enable(struct device *dev,
 600                 size_t count, int enable)
 601 {
 602         struct sas_phy *phy = transport_class_to_phy(dev);
 603         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 604         struct sas_internal *i = to_sas_internal(shost->transportt);
 605         int error;
 606
 607         error = i->f->phy_enable(phy, enable);
 608         if (error)
 609                 return error;
 610         phy->enabled = enable;
 611         return count;
 612 };
 613
 614 static ssize_t
 615 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 616                      const char *buf, size_t count)
 617 {
 618         if (count < 1)
 619                 return -EINVAL;
 620
 621         switch (buf[0]) {
 622         case '0':
 623                 do_sas_phy_enable(dev, count, 0);
 624                 break;
 625         case '1':
 626                 do_sas_phy_enable(dev, count, 1);
 627                 break;
 628         default:
 629                 return -EINVAL;
 630         }
 631
 632         return count;
 633 }
 634
 635 static ssize_t
 636 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 637                     char *buf)
 638 {
 639         struct sas_phy *phy = transport_class_to_phy(dev);
 640
 641         return snprintf(buf, 20, "%d", phy->enabled);
 642 }
 643
 644 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 645                          store_sas_phy_enable);
 646
 647 static ssize_t
 648 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 649 {
 650         struct sas_phy *phy = transport_class_to_phy(dev);
 651         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 652         struct sas_internal *i = to_sas_internal(shost->transportt);
 653         int error;
 654
 655         error = i->f->phy_reset(phy, hard_reset);
 656         if (error)
 657                 return error;
 658         phy->enabled = 1;
 659         return count;
 660 };
 661
 662 static ssize_t
 663 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 664                      const char *buf, size_t count)
 665 {
 666         return do_sas_phy_reset(dev, count, 0);
 667 }
 668 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 669
 670 static ssize_t
 671 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 672                      const char *buf, size_t count)
 673 {
 674         return do_sas_phy_reset(dev, count, 1);
 675 }
 676 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 677
 678 sas_phy_protocol_attr(identify.initiator_port_protocols,
 679                 initiator_port_protocols);
 680 sas_phy_protocol_attr(identify.target_port_protocols,
 681                 target_port_protocols);
 682 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 683                 unsigned long long);
 684 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 685 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 686 sas_phy_linkspeed_attr(negotiated_linkrate);
 687 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 688 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 689 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 690 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 691 sas_phy_linkerror_attr(invalid_dword_count);
 692 sas_phy_linkerror_attr(running_disparity_error_count);
 693 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 694 sas_phy_linkerror_attr(phy_reset_problem_count);
 695
 696 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 697                          struct device *cdev)
 698 {
 699         struct sas_phy *phy = dev_to_phy(dev);
 700         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 701         struct sas_internal *i = to_sas_internal(shost->transportt);
 702
 703         if (i->f->phy_setup)
 704                 i->f->phy_setup(phy);
 705
 706         return 0;
 707 }
 708
 709 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 710                 "sas_phy", sas_phy_setup, NULL, NULL);
 711
 712 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 713 {
 714         struct Scsi_Host *shost;
 715         struct sas_internal *i;
 716
 717         if (!scsi_is_sas_phy(dev))
 718                 return 0;
 719         shost = dev_to_shost(dev->parent);
 720
 721         if (!shost->transportt)
 722                 return 0;
 723         if (shost->transportt->host_attrs.ac.class !=
 724                         &sas_host_class.class)
 725                 return 0;
 726
 727         i = to_sas_internal(shost->transportt);
 728         return &i->phy_attr_cont.ac == cont;
 729 }
 730
 731 static void sas_phy_release(struct device *dev)
 732 {
 733         struct sas_phy *phy = dev_to_phy(dev);
 734         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 735         struct sas_internal *i = to_sas_internal(shost->transportt);
 736
 737         if (i->f->phy_release)
 738                 i->f->phy_release(phy);
 739         put_device(dev->parent);
 740         kfree(phy);
 741 }
 742
 743 /**
 744  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 745  * @parent:     Parent device
 746  * @number:     Phy index
 747  *
 748  * Allocates an SAS PHY structure.  It will be added in the device tree
 749  * below the device specified by @parent, which has to be either a Scsi_Host
 750  * or sas_rphy.
 751  *
 752  * Returns:
 753  *      SAS PHY allocated or %NULL if the allocation failed.
 754  */
 755 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 756 {
 757         struct Scsi_Host *shost = dev_to_shost(parent);
 758         struct sas_phy *phy;
 759
 760         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 761         if (!phy)
 762                 return NULL;
 763
 764         phy->number = number;
 765         phy->enabled = 1;
 766
 767         device_initialize(&phy->dev);
 768         phy->dev.parent = get_device(parent);
 769         phy->dev.release = sas_phy_release;
 770         INIT_LIST_HEAD(&phy->port_siblings);
 771         if (scsi_is_sas_expander_device(parent)) {
 772                 struct sas_rphy *rphy = dev_to_rphy(parent);
 773                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 774                         rphy->scsi_target_id, number);
 775         } else
 776                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 777
 778         transport_setup_device(&phy->dev);
 779
 780         return phy;
 781 }
 782 EXPORT_SYMBOL(sas_phy_alloc);
 783
 784 /**
 785  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 786  * @phy:        The PHY to be added
 787  *
 788  * Publishes a SAS PHY to the rest of the system.
 789  */
 790 int sas_phy_add(struct sas_phy *phy)
 791 {
 792         int error;
 793
 794         error = device_add(&phy->dev);
 795         if (!error) {
 796                 transport_add_device(&phy->dev);
 797                 transport_configure_device(&phy->dev);
 798         }
 799
 800         return error;
 801 }
 802 EXPORT_SYMBOL(sas_phy_add);
 803
 804 /**
 805  * sas_phy_free  -  free a SAS PHY
 806  * @phy:        SAS PHY to free
 807  *
 808  * Frees the specified SAS PHY.
 809  *
 810  * Note:
 811  *   This function must only be called on a PHY that has not
 812  *   successfully been added using sas_phy_add().
 813  */
 814 void sas_phy_free(struct sas_phy *phy)
 815 {
 816         transport_destroy_device(&phy->dev);
 817         put_device(&phy->dev);
 818 }
 819 EXPORT_SYMBOL(sas_phy_free);
 820
 821 /**
 822  * sas_phy_delete  -  remove SAS PHY
 823  * @phy:        SAS PHY to remove
 824  *
 825  * Removes the specified SAS PHY.  If the SAS PHY has an
 826  * associated remote PHY it is removed before.
 827  */
 828 void
 829 sas_phy_delete(struct sas_phy *phy)
 830 {
 831         struct device *dev = &phy->dev;
 832
 833         /* this happens if the phy is still part of a port when deleted */
 834         BUG_ON(!list_empty(&phy->port_siblings));
 835
 836         transport_remove_device(dev);
 837         device_del(dev);
 838         transport_destroy_device(dev);
 839         put_device(dev);
 840 }
 841 EXPORT_SYMBOL(sas_phy_delete);
 842
 843 /**
 844  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 845  * @dev:        device to check
 846  *
 847  * Returns:
 848  *      %1 if the device represents a SAS PHY, %0 else
 849  */
 850 int scsi_is_sas_phy(const struct device *dev)
 851 {
 852         return dev->release == sas_phy_release;
 853 }
 854 EXPORT_SYMBOL(scsi_is_sas_phy);
 855
 856 /*
 857  * SAS Port attributes
 858  */
 859 #define sas_port_show_simple(field, name, format_string, cast)          \
 860 static ssize_t                                                          \
 861 show_sas_port_##name(struct device *dev,                                \
 862                      struct device_attribute *attr, char *buf)          \
 863 {                                                                       \
 864         struct sas_port *port = transport_class_to_sas_port(dev);       \
 865                                                                         \
 866         return snprintf(buf, 20, format_string, cast port->field);      \
 867 }
 868
 869 #define sas_port_simple_attr(field, name, format_string, type)          \
 870         sas_port_show_simple(field, name, format_string, (type))        \
 871 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 872
 873 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 874
 875 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 876                                "sas_port", NULL, NULL, NULL);
 877
 878 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 879 {
 880         struct Scsi_Host *shost;
 881         struct sas_internal *i;
 882
 883         if (!scsi_is_sas_port(dev))
 884                 return 0;
 885         shost = dev_to_shost(dev->parent);
 886
 887         if (!shost->transportt)
 888                 return 0;
 889         if (shost->transportt->host_attrs.ac.class !=
 890                         &sas_host_class.class)
 891                 return 0;
 892
 893         i = to_sas_internal(shost->transportt);
 894         return &i->port_attr_cont.ac == cont;
 895 }
 896
 897
 898 static void sas_port_release(struct device *dev)
 899 {
 900         struct sas_port *port = dev_to_sas_port(dev);
 901
 902         BUG_ON(!list_empty(&port->phy_list));
 903
 904         put_device(dev->parent);
 905         kfree(port);
 906 }
 907
 908 static void sas_port_create_link(struct sas_port *port,
 909                                  struct sas_phy *phy)
 910 {
 911         int res;
 912
 913         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 914                                 dev_name(&phy->dev));
 915         if (res)
 916                 goto err;
 917         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 918         if (res)
 919                 goto err;
 920         return;
 921 err:
 922         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 923                __func__, res);
 924 }
 925
 926 static void sas_port_delete_link(struct sas_port *port,
 927                                  struct sas_phy *phy)
 928 {
 929         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 930         sysfs_remove_link(&phy->dev.kobj, "port");
 931 }
 932
 933 /** sas_port_alloc - allocate and initialize a SAS port structure
 934  *
 935  * @parent:     parent device
 936  * @port_id:    port number
 937  *
 938  * Allocates a SAS port structure.  It will be added to the device tree
 939  * below the device specified by @parent which must be either a Scsi_Host
 940  * or a sas_expander_device.
 941  *
 942  * Returns %NULL on error
 943  */
 944 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 945 {
 946         struct Scsi_Host *shost = dev_to_shost(parent);
 947         struct sas_port *port;
 948
 949         port = kzalloc(sizeof(*port), GFP_KERNEL);
 950         if (!port)
 951                 return NULL;
 952
 953         port->port_identifier = port_id;
 954
 955         device_initialize(&port->dev);
 956
 957         port->dev.parent = get_device(parent);
 958         port->dev.release = sas_port_release;
 959
 960         mutex_init(&port->phy_list_mutex);
 961         INIT_LIST_HEAD(&port->phy_list);
 962
 963         if (scsi_is_sas_expander_device(parent)) {
 964                 struct sas_rphy *rphy = dev_to_rphy(parent);
 965                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 966                              rphy->scsi_target_id, port->port_identifier);
 967         } else
 968                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 969                              port->port_identifier);
 970
 971         transport_setup_device(&port->dev);
 972
 973         return port;
 974 }
 975 EXPORT_SYMBOL(sas_port_alloc);
 976
 977 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 978  *
 979  * @parent:     parent device
 980  *
 981  * Allocates a SAS port structure and a number to go with it.  This
 982  * interface is really for adapters where the port number has no
 983  * meansing, so the sas class should manage them.  It will be added to
 984  * the device tree below the device specified by @parent which must be
 985  * either a Scsi_Host or a sas_expander_device.
 986  *
 987  * Returns %NULL on error
 988  */
 989 struct sas_port *sas_port_alloc_num(struct device *parent)
 990 {
 991         int index;
 992         struct Scsi_Host *shost = dev_to_shost(parent);
 993         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 994
 995         /* FIXME: use idr for this eventually */
 996         mutex_lock(&sas_host->lock);
 997         if (scsi_is_sas_expander_device(parent)) {
 998                 struct sas_rphy *rphy = dev_to_rphy(parent);
 999                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
1000
1001                 index = exp->next_port_id++;
1002         } else
1003                 index = sas_host->next_port_id++;
1004         mutex_unlock(&sas_host->lock);
1005         return sas_port_alloc(parent, index);
1006 }
1007 EXPORT_SYMBOL(sas_port_alloc_num);
1008
1009 /**
1010  * sas_port_add - add a SAS port to the device hierarchy
1011  * @port:       port to be added
1012  *
1013  * publishes a port to the rest of the system
1014  */
1015 int sas_port_add(struct sas_port *port)
1016 {
1017         int error;
1018
1019         /* No phys should be added until this is made visible */
1020         BUG_ON(!list_empty(&port->phy_list));
1021
1022         error = device_add(&port->dev);
1023
1024         if (error)
1025                 return error;
1026
1027         transport_add_device(&port->dev);
1028         transport_configure_device(&port->dev);
1029
1030         return 0;
1031 }
1032 EXPORT_SYMBOL(sas_port_add);
1033
1034 /**
1035  * sas_port_free  -  free a SAS PORT
1036  * @port:       SAS PORT to free
1037  *
1038  * Frees the specified SAS PORT.
1039  *
1040  * Note:
1041  *   This function must only be called on a PORT that has not
1042  *   successfully been added using sas_port_add().
1043  */
1044 void sas_port_free(struct sas_port *port)
1045 {
1046         transport_destroy_device(&port->dev);
1047         put_device(&port->dev);
1048 }
1049 EXPORT_SYMBOL(sas_port_free);
1050
1051 /**
1052  * sas_port_delete  -  remove SAS PORT
1053  * @port:       SAS PORT to remove
1054  *
1055  * Removes the specified SAS PORT.  If the SAS PORT has an
1056  * associated phys, unlink them from the port as well.
1057  */
1058 void sas_port_delete(struct sas_port *port)
1059 {
1060         struct device *dev = &port->dev;
1061         struct sas_phy *phy, *tmp_phy;
1062
1063         if (port->rphy) {
1064                 sas_rphy_delete(port->rphy);
1065                 port->rphy = NULL;
1066         }
1067
1068         mutex_lock(&port->phy_list_mutex);
1069         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1070                                  port_siblings) {
1071                 sas_port_delete_link(port, phy);
1072                 list_del_init(&phy->port_siblings);
1073         }
1074         mutex_unlock(&port->phy_list_mutex);
1075
1076         if (port->is_backlink) {
1077                 struct device *parent = port->dev.parent;
1078
1079                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1080                 port->is_backlink = 0;
1081         }
1082
1083         transport_remove_device(dev);
1084         device_del(dev);
1085         transport_destroy_device(dev);
1086         put_device(dev);
1087 }
1088 EXPORT_SYMBOL(sas_port_delete);
1089
1090 /**
1091  * scsi_is_sas_port -  check if a struct device represents a SAS port
1092  * @dev:        device to check
1093  *
1094  * Returns:
1095  *      %1 if the device represents a SAS Port, %0 else
1096  */
1097 int scsi_is_sas_port(const struct device *dev)
1098 {
1099         return dev->release == sas_port_release;
1100 }
1101 EXPORT_SYMBOL(scsi_is_sas_port);
1102
1103 /**
1104  * sas_port_get_phy - try to take a reference on a port member
1105  * @port: port to check
1106  */
1107 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1108 {
1109         struct sas_phy *phy;
1110
1111         mutex_lock(&port->phy_list_mutex);
1112         if (list_empty(&port->phy_list))
1113                 phy = NULL;
1114         else {
1115                 struct list_head *ent = port->phy_list.next;
1116
1117                 phy = list_entry(ent, typeof(*phy), port_siblings);
1118                 get_device(&phy->dev);
1119         }
1120         mutex_unlock(&port->phy_list_mutex);
1121
1122         return phy;
1123 }
1124 EXPORT_SYMBOL(sas_port_get_phy);
1125
1126 /**
1127  * sas_port_add_phy - add another phy to a port to form a wide port
1128  * @port:       port to add the phy to
1129  * @phy:        phy to add
1130  *
1131  * When a port is initially created, it is empty (has no phys).  All
1132  * ports must have at least one phy to operated, and all wide ports
1133  * must have at least two.  The current code makes no difference
1134  * between ports and wide ports, but the only object that can be
1135  * connected to a remote device is a port, so ports must be formed on
1136  * all devices with phys if they're connected to anything.
1137  */
1138 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1139 {
1140         mutex_lock(&port->phy_list_mutex);
1141         if (unlikely(!list_empty(&phy->port_siblings))) {
1142                 /* make sure we're already on this port */
1143                 struct sas_phy *tmp;
1144
1145                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1146                         if (tmp == phy)
1147                                 break;
1148                 /* If this trips, you added a phy that was already
1149                  * part of a different port */
1150                 if (unlikely(tmp != phy)) {
1151                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1152                                    dev_name(&phy->dev));
1153                         BUG();
1154                 }
1155         } else {
1156                 sas_port_create_link(port, phy);
1157                 list_add_tail(&phy->port_siblings, &port->phy_list);
1158                 port->num_phys++;
1159         }
1160         mutex_unlock(&port->phy_list_mutex);
1161 }
1162 EXPORT_SYMBOL(sas_port_add_phy);
1163
1164 /**
1165  * sas_port_delete_phy - remove a phy from a port or wide port
1166  * @port:       port to remove the phy from
1167  * @phy:        phy to remove
1168  *
1169  * This operation is used for tearing down ports again.  It must be
1170  * done to every port or wide port before calling sas_port_delete.
1171  */
1172 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1173 {
1174         mutex_lock(&port->phy_list_mutex);
1175         sas_port_delete_link(port, phy);
1176         list_del_init(&phy->port_siblings);
1177         port->num_phys--;
1178         mutex_unlock(&port->phy_list_mutex);
1179 }
1180 EXPORT_SYMBOL(sas_port_delete_phy);
1181
1182 void sas_port_mark_backlink(struct sas_port *port)
1183 {
1184         int res;
1185         struct device *parent = port->dev.parent->parent->parent;
1186
1187         if (port->is_backlink)
1188                 return;
1189         port->is_backlink = 1;
1190         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1191                                 dev_name(parent));
1192         if (res)
1193                 goto err;
1194         return;
1195 err:
1196         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1197                __func__, res);
1198
1199 }
1200 EXPORT_SYMBOL(sas_port_mark_backlink);
1201
1202 /*
1203  * SAS remote PHY attributes.
1204  */
1205
1206 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1207 static ssize_t                                                          \
1208 show_sas_rphy_##name(struct device *dev,                                \
1209                      struct device_attribute *attr, char *buf)          \
1210 {                                                                       \
1211         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1212                                                                         \
1213         return snprintf(buf, 20, format_string, cast rphy->field);      \
1214 }
1215
1216 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1217         sas_rphy_show_simple(field, name, format_string, (type))        \
1218 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1219                 show_sas_rphy_##name, NULL)
1220
1221 #define sas_rphy_show_protocol(field, name)                             \
1222 static ssize_t                                                          \
1223 show_sas_rphy_##name(struct device *dev,                                \
1224                      struct device_attribute *attr, char *buf)          \
1225 {                                                                       \
1226         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1227                                                                         \
1228         if (!rphy->field)                                       \
1229                 return snprintf(buf, 20, "none\n");                     \
1230         return get_sas_protocol_names(rphy->field, buf);        \
1231 }
1232
1233 #define sas_rphy_protocol_attr(field, name)                             \
1234         sas_rphy_show_protocol(field, name)                             \
1235 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1236                 show_sas_rphy_##name, NULL)
1237
1238 static ssize_t
1239 show_sas_rphy_device_type(struct device *dev,
1240                           struct device_attribute *attr, char *buf)
1241 {
1242         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1243
1244         if (!rphy->identify.device_type)
1245                 return snprintf(buf, 20, "none\n");
1246         return get_sas_device_type_names(
1247                         rphy->identify.device_type, buf);
1248 }
1249
1250 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1251                 show_sas_rphy_device_type, NULL);
1252
1253 static ssize_t
1254 show_sas_rphy_enclosure_identifier(struct device *dev,
1255                                    struct device_attribute *attr, char *buf)
1256 {
1257         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1258         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1259         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1260         struct sas_internal *i = to_sas_internal(shost->transportt);
1261         u64 identifier;
1262         int error;
1263
1264         error = i->f->get_enclosure_identifier(rphy, &identifier);
1265         if (error)
1266                 return error;
1267         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1268 }
1269
1270 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1271                 show_sas_rphy_enclosure_identifier, NULL);
1272
1273 static ssize_t
1274 show_sas_rphy_bay_identifier(struct device *dev,
1275                              struct device_attribute *attr, char *buf)
1276 {
1277         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1278         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1279         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1280         struct sas_internal *i = to_sas_internal(shost->transportt);
1281         int val;
1282
1283         val = i->f->get_bay_identifier(rphy);
1284         if (val < 0)
1285                 return val;
1286         return sprintf(buf, "%d\n", val);
1287 }
1288
1289 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1290                 show_sas_rphy_bay_identifier, NULL);
1291
1292 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1293                 initiator_port_protocols);
1294 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1295 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1296                 unsigned long long);
1297 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1298 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1299
1300 /* only need 8 bytes of data plus header (4 or 8) */
1301 #define BUF_SIZE 64
1302
1303 int sas_read_port_mode_page(struct scsi_device *sdev)
1304 {
1305         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1306         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1307         struct scsi_mode_data mode_data;
1308         int res, error;
1309
1310         if (!buffer)
1311                 return -ENOMEM;
1312
1313         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1314                               &mode_data, NULL);
1315
1316         error = -EINVAL;
1317         if (!scsi_status_is_good(res))
1318                 goto out;
1319
1320         msdata = buffer +  mode_data.header_length +
1321                 mode_data.block_descriptor_length;
1322
1323         if (msdata - buffer > BUF_SIZE - 8)
1324                 goto out;
1325
1326         error = 0;
1327
1328         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1329         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1330         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1331
1332  out:
1333         kfree(buffer);
1334         return error;
1335 }
1336 EXPORT_SYMBOL(sas_read_port_mode_page);
1337
1338 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1339                                "sas_end_device", NULL, NULL, NULL);
1340
1341 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1342 static ssize_t                                                          \
1343 show_sas_end_dev_##name(struct device *dev,                             \
1344                         struct device_attribute *attr, char *buf)       \
1345 {                                                                       \
1346         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1347         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1348                                                                         \
1349         return snprintf(buf, 20, format_string, cast rdev->field);      \
1350 }
1351
1352 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1353         sas_end_dev_show_simple(field, name, format_string, (type))     \
1354 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1355                 show_sas_end_dev_##name, NULL)
1356
1357 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1358 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1359                         "%d\n", int);
1360 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1361                         "%d\n", int);
1362 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1363                         "%d\n", int);
1364 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1365                         "%d\n", int);
1366
1367 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1368                                "sas_expander", NULL, NULL, NULL);
1369
1370 #define sas_expander_show_simple(field, name, format_string, cast)      \
1371 static ssize_t                                                          \
1372 show_sas_expander_##name(struct device *dev,                            \
1373                          struct device_attribute *attr, char *buf)      \
1374 {                                                                       \
1375         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1376         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1377                                                                         \
1378         return snprintf(buf, 20, format_string, cast edev->field);      \
1379 }
1380
1381 #define sas_expander_simple_attr(field, name, format_string, type)      \
1382         sas_expander_show_simple(field, name, format_string, (type))    \
1383 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1384                 show_sas_expander_##name, NULL)
1385
1386 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1387 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1388 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1389 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1390                          "%s\n", char *);
1391 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1392 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1393                          unsigned int);
1394 sas_expander_simple_attr(level, level, "%d\n", int);
1395
1396 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1397                 "sas_device", NULL, NULL, NULL);
1398
1399 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1400 {
1401         struct Scsi_Host *shost;
1402         struct sas_internal *i;
1403
1404         if (!scsi_is_sas_rphy(dev))
1405                 return 0;
1406         shost = dev_to_shost(dev->parent->parent);
1407
1408         if (!shost->transportt)
1409                 return 0;
1410         if (shost->transportt->host_attrs.ac.class !=
1411                         &sas_host_class.class)
1412                 return 0;
1413
1414         i = to_sas_internal(shost->transportt);
1415         return &i->rphy_attr_cont.ac == cont;
1416 }
1417
1418 static int sas_end_dev_match(struct attribute_container *cont,
1419                              struct device *dev)
1420 {
1421         struct Scsi_Host *shost;
1422         struct sas_internal *i;
1423         struct sas_rphy *rphy;
1424
1425         if (!scsi_is_sas_rphy(dev))
1426                 return 0;
1427         shost = dev_to_shost(dev->parent->parent);
1428         rphy = dev_to_rphy(dev);
1429
1430         if (!shost->transportt)
1431                 return 0;
1432         if (shost->transportt->host_attrs.ac.class !=
1433                         &sas_host_class.class)
1434                 return 0;
1435
1436         i = to_sas_internal(shost->transportt);
1437         return &i->end_dev_attr_cont.ac == cont &&
1438                 rphy->identify.device_type == SAS_END_DEVICE;
1439 }
1440
1441 static int sas_expander_match(struct attribute_container *cont,
1442                               struct device *dev)
1443 {
1444         struct Scsi_Host *shost;
1445         struct sas_internal *i;
1446         struct sas_rphy *rphy;
1447
1448         if (!scsi_is_sas_rphy(dev))
1449                 return 0;
1450         shost = dev_to_shost(dev->parent->parent);
1451         rphy = dev_to_rphy(dev);
1452
1453         if (!shost->transportt)
1454                 return 0;
1455         if (shost->transportt->host_attrs.ac.class !=
1456                         &sas_host_class.class)
1457                 return 0;
1458
1459         i = to_sas_internal(shost->transportt);
1460         return &i->expander_attr_cont.ac == cont &&
1461                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1462                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1463 }
1464
1465 static void sas_expander_release(struct device *dev)
1466 {
1467         struct sas_rphy *rphy = dev_to_rphy(dev);
1468         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1469
1470         if (rphy->q)
1471                 blk_cleanup_queue(rphy->q);
1472
1473         put_device(dev->parent);
1474         kfree(edev);
1475 }
1476
1477 static void sas_end_device_release(struct device *dev)
1478 {
1479         struct sas_rphy *rphy = dev_to_rphy(dev);
1480         struct sas_end_device *edev = rphy_to_end_device(rphy);
1481
1482         if (rphy->q)
1483                 blk_cleanup_queue(rphy->q);
1484
1485         put_device(dev->parent);
1486         kfree(edev);
1487 }
1488
1489 /**
1490  * sas_rphy_initialize - common rphy initialization
1491  * @rphy:       rphy to initialise
1492  *
1493  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1494  * initialise the common rphy component of each.
1495  */
1496 static void sas_rphy_initialize(struct sas_rphy *rphy)
1497 {
1498         INIT_LIST_HEAD(&rphy->list);
1499 }
1500
1501 /**
1502  * sas_end_device_alloc - allocate an rphy for an end device
1503  * @parent: which port
1504  *
1505  * Allocates an SAS remote PHY structure, connected to @parent.
1506  *
1507  * Returns:
1508  *      SAS PHY allocated or %NULL if the allocation failed.
1509  */
1510 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1511 {
1512         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1513         struct sas_end_device *rdev;
1514
1515         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1516         if (!rdev) {
1517                 return NULL;
1518         }
1519
1520         device_initialize(&rdev->rphy.dev);
1521         rdev->rphy.dev.parent = get_device(&parent->dev);
1522         rdev->rphy.dev.release = sas_end_device_release;
1523         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1524                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1525                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1526                              shost->host_no, rphy->scsi_target_id,
1527                              parent->port_identifier);
1528         } else
1529                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1530                              shost->host_no, parent->port_identifier);
1531         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1532         sas_rphy_initialize(&rdev->rphy);
1533         transport_setup_device(&rdev->rphy.dev);
1534
1535         return &rdev->rphy;
1536 }
1537 EXPORT_SYMBOL(sas_end_device_alloc);
1538
1539 /**
1540  * sas_expander_alloc - allocate an rphy for an end device
1541  * @parent: which port
1542  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1543  *
1544  * Allocates an SAS remote PHY structure, connected to @parent.
1545  *
1546  * Returns:
1547  *      SAS PHY allocated or %NULL if the allocation failed.
1548  */
1549 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1550                                     enum sas_device_type type)
1551 {
1552         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1553         struct sas_expander_device *rdev;
1554         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1555
1556         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1557                type != SAS_FANOUT_EXPANDER_DEVICE);
1558
1559         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1560         if (!rdev) {
1561                 return NULL;
1562         }
1563
1564         device_initialize(&rdev->rphy.dev);
1565         rdev->rphy.dev.parent = get_device(&parent->dev);
1566         rdev->rphy.dev.release = sas_expander_release;
1567         mutex_lock(&sas_host->lock);
1568         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1569         mutex_unlock(&sas_host->lock);
1570         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1571                      shost->host_no, rdev->rphy.scsi_target_id);
1572         rdev->rphy.identify.device_type = type;
1573         sas_rphy_initialize(&rdev->rphy);
1574         transport_setup_device(&rdev->rphy.dev);
1575
1576         return &rdev->rphy;
1577 }
1578 EXPORT_SYMBOL(sas_expander_alloc);
1579
1580 /**
1581  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1582  * @rphy:       The remote PHY to be added
1583  *
1584  * Publishes a SAS remote PHY to the rest of the system.
1585  */
1586 int sas_rphy_add(struct sas_rphy *rphy)
1587 {
1588         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1589         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1590         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1591         struct sas_identify *identify = &rphy->identify;
1592         int error;
1593
1594         if (parent->rphy)
1595                 return -ENXIO;
1596         parent->rphy = rphy;
1597
1598         error = device_add(&rphy->dev);
1599         if (error)
1600                 return error;
1601         transport_add_device(&rphy->dev);
1602         transport_configure_device(&rphy->dev);
1603         if (sas_bsg_initialize(shost, rphy))
1604                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1605
1606
1607         mutex_lock(&sas_host->lock);
1608         list_add_tail(&rphy->list, &sas_host->rphy_list);
1609         if (identify->device_type == SAS_END_DEVICE &&
1610             (identify->target_port_protocols &
1611              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1612                 rphy->scsi_target_id = sas_host->next_target_id++;
1613         else if (identify->device_type == SAS_END_DEVICE)
1614                 rphy->scsi_target_id = -1;
1615         mutex_unlock(&sas_host->lock);
1616
1617         if (identify->device_type == SAS_END_DEVICE &&
1618             rphy->scsi_target_id != -1) {
1619                 int lun;
1620
1621                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1622                         lun = SCAN_WILD_CARD;
1623                 else
1624                         lun = 0;
1625
1626                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1627                                  SCSI_SCAN_INITIAL);
1628         }
1629
1630         return 0;
1631 }
1632 EXPORT_SYMBOL(sas_rphy_add);
1633
1634 /**
1635  * sas_rphy_free  -  free a SAS remote PHY
1636  * @rphy: SAS remote PHY to free
1637  *
1638  * Frees the specified SAS remote PHY.
1639  *
1640  * Note:
1641  *   This function must only be called on a remote
1642  *   PHY that has not successfully been added using
1643  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1644  */
1645 void sas_rphy_free(struct sas_rphy *rphy)
1646 {
1647         struct device *dev = &rphy->dev;
1648         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1649         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1650
1651         mutex_lock(&sas_host->lock);
1652         list_del(&rphy->list);
1653         mutex_unlock(&sas_host->lock);
1654
1655         transport_destroy_device(dev);
1656
1657         put_device(dev);
1658 }
1659 EXPORT_SYMBOL(sas_rphy_free);
1660
1661 /**
1662  * sas_rphy_delete  -  remove and free SAS remote PHY
1663  * @rphy:       SAS remote PHY to remove and free
1664  *
1665  * Removes the specified SAS remote PHY and frees it.
1666  */
1667 void
1668 sas_rphy_delete(struct sas_rphy *rphy)
1669 {
1670         sas_rphy_remove(rphy);
1671         sas_rphy_free(rphy);
1672 }
1673 EXPORT_SYMBOL(sas_rphy_delete);
1674
1675 /**
1676  * sas_rphy_unlink  -  unlink SAS remote PHY
1677  * @rphy:       SAS remote phy to unlink from its parent port
1678  *
1679  * Removes port reference to an rphy
1680  */
1681 void sas_rphy_unlink(struct sas_rphy *rphy)
1682 {
1683         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1684
1685         parent->rphy = NULL;
1686 }
1687 EXPORT_SYMBOL(sas_rphy_unlink);
1688
1689 /**
1690  * sas_rphy_remove  -  remove SAS remote PHY
1691  * @rphy:       SAS remote phy to remove
1692  *
1693  * Removes the specified SAS remote PHY.
1694  */
1695 void
1696 sas_rphy_remove(struct sas_rphy *rphy)
1697 {
1698         struct device *dev = &rphy->dev;
1699
1700         switch (rphy->identify.device_type) {
1701         case SAS_END_DEVICE:
1702                 scsi_remove_target(dev);
1703                 break;
1704         case SAS_EDGE_EXPANDER_DEVICE:
1705         case SAS_FANOUT_EXPANDER_DEVICE:
1706                 sas_remove_children(dev);
1707                 break;
1708         default:
1709                 break;
1710         }
1711
1712         sas_rphy_unlink(rphy);
1713         sas_bsg_remove(NULL, rphy);
1714         transport_remove_device(dev);
1715         device_del(dev);
1716 }
1717 EXPORT_SYMBOL(sas_rphy_remove);
1718
1719 /**
1720  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1721  * @dev:        device to check
1722  *
1723  * Returns:
1724  *      %1 if the device represents a SAS remote PHY, %0 else
1725  */
1726 int scsi_is_sas_rphy(const struct device *dev)
1727 {
1728         return dev->release == sas_end_device_release ||
1729                 dev->release == sas_expander_release;
1730 }
1731 EXPORT_SYMBOL(scsi_is_sas_rphy);
1732
1733
1734 /*
1735  * SCSI scan helper
1736  */
1737
1738 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1739                 uint id, u64 lun)
1740 {
1741         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1742         struct sas_rphy *rphy;
1743
1744         mutex_lock(&sas_host->lock);
1745         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1746                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1747                     rphy->scsi_target_id == -1)
1748                         continue;
1749
1750                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1751                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1752                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1753                                          lun, SCSI_SCAN_MANUAL);
1754                 }
1755         }
1756         mutex_unlock(&sas_host->lock);
1757
1758         return 0;
1759 }
1760
1761
1762 /*
1763  * Setup / Teardown code
1764  */
1765
1766 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1767         i->private_##attrb[count] = dev_attr_##field;           \
1768         i->private_##attrb[count].attr.mode = perm;                     \
1769         i->attrb[count] = &i->private_##attrb[count];                   \
1770         if (test)                                                       \
1771                 count++
1772
1773 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1774         i->private_##attrb[count] = dev_attr_##field;           \
1775         i->private_##attrb[count].attr.mode = perm;                     \
1776         if (ro_test) {                                                  \
1777                 i->private_##attrb[count].attr.mode = ro_perm;          \
1778                 i->private_##attrb[count].store = NULL;                 \
1779         }                                                               \
1780         i->attrb[count] = &i->private_##attrb[count];                   \
1781         if (test)                                                       \
1782                 count++
1783
1784 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1785         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1786
1787 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1788         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1789
1790 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1791         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1792
1793 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1794         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1795                         !i->f->set_phy_speed, S_IRUGO)
1796
1797 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1798         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1799                           !i->f->func, S_IRUGO)
1800
1801 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1802         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1803
1804 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1805         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1806
1807 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1808         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1809
1810 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1811         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1812
1813 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1814         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1815
1816 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1817         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1818
1819 /**
1820  * sas_attach_transport  -  instantiate SAS transport template
1821  * @ft:         SAS transport class function template
1822  */
1823 struct scsi_transport_template *
1824 sas_attach_transport(struct sas_function_template *ft)
1825 {
1826         struct sas_internal *i;
1827         int count;
1828
1829         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1830         if (!i)
1831                 return NULL;
1832
1833         i->t.user_scan = sas_user_scan;
1834
1835         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1836         i->t.host_attrs.ac.class = &sas_host_class.class;
1837         i->t.host_attrs.ac.match = sas_host_match;
1838         transport_container_register(&i->t.host_attrs);
1839         i->t.host_size = sizeof(struct sas_host_attrs);
1840
1841         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1842         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1843         i->phy_attr_cont.ac.match = sas_phy_match;
1844         transport_container_register(&i->phy_attr_cont);
1845
1846         i->port_attr_cont.ac.class = &sas_port_class.class;
1847         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1848         i->port_attr_cont.ac.match = sas_port_match;
1849         transport_container_register(&i->port_attr_cont);
1850
1851         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1852         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1853         i->rphy_attr_cont.ac.match = sas_rphy_match;
1854         transport_container_register(&i->rphy_attr_cont);
1855
1856         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1857         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1858         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1859         transport_container_register(&i->end_dev_attr_cont);
1860
1861         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1862         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1863         i->expander_attr_cont.ac.match = sas_expander_match;
1864         transport_container_register(&i->expander_attr_cont);
1865
1866         i->f = ft;
1867
1868         count = 0;
1869         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1870         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1871         SETUP_PHY_ATTRIBUTE(device_type);
1872         SETUP_PHY_ATTRIBUTE(sas_address);
1873         SETUP_PHY_ATTRIBUTE(phy_identifier);
1874         //SETUP_PHY_ATTRIBUTE(port_identifier);
1875         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1876         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1877         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1878         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1879         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1880
1881         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1882         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1883         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1884         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1885         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1886         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1887         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1888         i->phy_attrs[count] = NULL;
1889
1890         count = 0;
1891         SETUP_PORT_ATTRIBUTE(num_phys);
1892         i->port_attrs[count] = NULL;
1893
1894         count = 0;
1895         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1896         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1897         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1898         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1899         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1900         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1901         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1902                                        get_enclosure_identifier);
1903         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1904                                        get_bay_identifier);
1905         i->rphy_attrs[count] = NULL;
1906
1907         count = 0;
1908         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1909         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1910         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1911         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1912         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1913         i->end_dev_attrs[count] = NULL;
1914
1915         count = 0;
1916         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1917         SETUP_EXPANDER_ATTRIBUTE(product_id);
1918         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1919         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1920         SETUP_EXPANDER_ATTRIBUTE(component_id);
1921         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1922         SETUP_EXPANDER_ATTRIBUTE(level);
1923         i->expander_attrs[count] = NULL;
1924
1925         return &i->t;
1926 }
1927 EXPORT_SYMBOL(sas_attach_transport);
1928
1929 /**
1930  * sas_release_transport  -  release SAS transport template instance
1931  * @t:          transport template instance
1932  */
1933 void sas_release_transport(struct scsi_transport_template *t)
1934 {
1935         struct sas_internal *i = to_sas_internal(t);
1936
1937         transport_container_unregister(&i->t.host_attrs);
1938         transport_container_unregister(&i->phy_attr_cont);
1939         transport_container_unregister(&i->port_attr_cont);
1940         transport_container_unregister(&i->rphy_attr_cont);
1941         transport_container_unregister(&i->end_dev_attr_cont);
1942         transport_container_unregister(&i->expander_attr_cont);
1943
1944         kfree(i);
1945 }
1946 EXPORT_SYMBOL(sas_release_transport);
1947
1948 static __init int sas_transport_init(void)
1949 {
1950         int error;
1951
1952         error = transport_class_register(&sas_host_class);
1953         if (error)
1954                 goto out;
1955         error = transport_class_register(&sas_phy_class);
1956         if (error)
1957                 goto out_unregister_transport;
1958         error = transport_class_register(&sas_port_class);
1959         if (error)
1960                 goto out_unregister_phy;
1961         error = transport_class_register(&sas_rphy_class);
1962         if (error)
1963                 goto out_unregister_port;
1964         error = transport_class_register(&sas_end_dev_class);
1965         if (error)
1966                 goto out_unregister_rphy;
1967         error = transport_class_register(&sas_expander_class);
1968         if (error)
1969                 goto out_unregister_end_dev;
1970
1971         return 0;
1972
1973  out_unregister_end_dev:
1974         transport_class_unregister(&sas_end_dev_class);
1975  out_unregister_rphy:
1976         transport_class_unregister(&sas_rphy_class);
1977  out_unregister_port:
1978         transport_class_unregister(&sas_port_class);
1979  out_unregister_phy:
1980         transport_class_unregister(&sas_phy_class);
1981  out_unregister_transport:
1982         transport_class_unregister(&sas_host_class);
1983  out:
1984         return error;
1985
1986 }
1987
1988 static void __exit sas_transport_exit(void)
1989 {
1990         transport_class_unregister(&sas_host_class);
1991         transport_class_unregister(&sas_phy_class);
1992         transport_class_unregister(&sas_port_class);
1993         transport_class_unregister(&sas_rphy_class);
1994         transport_class_unregister(&sas_end_dev_class);
1995         transport_class_unregister(&sas_expander_class);
1996 }
1997
1998 MODULE_AUTHOR("Christoph Hellwig");
1999 MODULE_DESCRIPTION("SAS Transport Attributes");
2000 MODULE_LICENSE("GPL");
2001
2002 module_init(sas_transport_init);
2003 module_exit(sas_transport_exit);