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_device.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_transport.h>
  39 #include <scsi/scsi_transport_sas.h>
  40
  41 #include "scsi_sas_internal.h"
  42 struct sas_host_attrs {
  43         struct list_head rphy_list;
  44         struct mutex lock;
  45         struct request_queue *q;
  46         u32 next_target_id;
  47         u32 next_expander_id;
  48         int next_port_id;
  49 };
  50 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
  51
  52
  53 /*
  54  * Hack to allow attributes of the same name in different objects.
  55  */
  56 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  57         struct device_attribute dev_attr_##_prefix##_##_name = \
  58         __ATTR(_name,_mode,_show,_store)
  59
  60
  61 /*
  62  * Pretty printing helpers
  63  */
  64
  65 #define sas_bitfield_name_match(title, table)                   \
  66 static ssize_t                                                  \
  67 get_sas_##title##_names(u32 table_key, char *buf)               \
  68 {                                                               \
  69         char *prefix = "";                                      \
  70         ssize_t len = 0;                                        \
  71         int i;                                                  \
  72                                                                 \
  73         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  74                 if (table[i].value & table_key) {               \
  75                         len += sprintf(buf + len, "%s%s",       \
  76                                 prefix, table[i].name);         \
  77                         prefix = ", ";                          \
  78                 }                                               \
  79         }                                                       \
  80         len += sprintf(buf + len, "\n");                        \
  81         return len;                                             \
  82 }
  83
  84 #define sas_bitfield_name_set(title, table)                     \
  85 static ssize_t                                                  \
  86 set_sas_##title##_names(u32 *table_key, const char *buf)        \
  87 {                                                               \
  88         ssize_t len = 0;                                        \
  89         int i;                                                  \
  90                                                                 \
  91         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  92                 len = strlen(table[i].name);                    \
  93                 if (strncmp(buf, table[i].name, len) == 0 &&    \
  94                     (buf[len] == '\n' || buf[len] == '\0')) {   \
  95                         *table_key = table[i].value;            \
  96                         return 0;                               \
  97                 }                                               \
  98         }                                                       \
  99         return -EINVAL;                                         \
 100 }
 101
 102 #define sas_bitfield_name_search(title, table)                  \
 103 static ssize_t                                                  \
 104 get_sas_##title##_names(u32 table_key, char *buf)               \
 105 {                                                               \
 106         ssize_t len = 0;                                        \
 107         int i;                                                  \
 108                                                                 \
 109         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 110                 if (table[i].value == table_key) {              \
 111                         len += sprintf(buf + len, "%s",         \
 112                                 table[i].name);                 \
 113                         break;                                  \
 114                 }                                               \
 115         }                                                       \
 116         len += sprintf(buf + len, "\n");                        \
 117         return len;                                             \
 118 }
 119
 120 static struct {
 121         u32             value;
 122         char            *name;
 123 } sas_device_type_names[] = {
 124         { SAS_PHY_UNUSED,               "unused" },
 125         { SAS_END_DEVICE,               "end device" },
 126         { SAS_EDGE_EXPANDER_DEVICE,     "edge expander" },
 127         { SAS_FANOUT_EXPANDER_DEVICE,   "fanout expander" },
 128 };
 129 sas_bitfield_name_search(device_type, sas_device_type_names)
 130
 131
 132 static struct {
 133         u32             value;
 134         char            *name;
 135 } sas_protocol_names[] = {
 136         { SAS_PROTOCOL_SATA,            "sata" },
 137         { SAS_PROTOCOL_SMP,             "smp" },
 138         { SAS_PROTOCOL_STP,             "stp" },
 139         { SAS_PROTOCOL_SSP,             "ssp" },
 140 };
 141 sas_bitfield_name_match(protocol, sas_protocol_names)
 142
 143 static struct {
 144         u32             value;
 145         char            *name;
 146 } sas_linkspeed_names[] = {
 147         { SAS_LINK_RATE_UNKNOWN,        "Unknown" },
 148         { SAS_PHY_DISABLED,             "Phy disabled" },
 149         { SAS_LINK_RATE_FAILED,         "Link Rate failed" },
 150         { SAS_SATA_SPINUP_HOLD,         "Spin-up hold" },
 151         { SAS_LINK_RATE_1_5_GBPS,       "1.5 Gbit" },
 152         { SAS_LINK_RATE_3_0_GBPS,       "3.0 Gbit" },
 153         { SAS_LINK_RATE_6_0_GBPS,       "6.0 Gbit" },
 154 };
 155 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 156 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 157
 158 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 159 {
 160         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 161         struct sas_end_device *rdev;
 162
 163         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 164
 165         rdev = rphy_to_end_device(rphy);
 166         return rdev;
 167 }
 168
 169 static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
 170                             struct sas_rphy *rphy)
 171 {
 172         struct request *req;
 173         int ret;
 174         int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 175
 176         while ((req = blk_fetch_request(q)) != NULL) {
 177                 spin_unlock_irq(q->queue_lock);
 178
 179                 handler = to_sas_internal(shost->transportt)->f->smp_handler;
 180                 ret = handler(shost, rphy, req);
 181                 req->errors = ret;
 182
 183                 blk_end_request_all(req, ret);
 184
 185                 spin_lock_irq(q->queue_lock);
 186         }
 187 }
 188
 189 static void sas_host_smp_request(struct request_queue *q)
 190 {
 191         sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
 192 }
 193
 194 static void sas_non_host_smp_request(struct request_queue *q)
 195 {
 196         struct sas_rphy *rphy = q->queuedata;
 197         sas_smp_request(q, rphy_to_shost(rphy), rphy);
 198 }
 199
 200 static void sas_host_release(struct device *dev)
 201 {
 202         struct Scsi_Host *shost = dev_to_shost(dev);
 203         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 204         struct request_queue *q = sas_host->q;
 205
 206         if (q)
 207                 blk_cleanup_queue(q);
 208 }
 209
 210 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 211 {
 212         struct request_queue *q;
 213         int error;
 214         struct device *dev;
 215         char namebuf[20];
 216         const char *name;
 217         void (*release)(struct device *);
 218
 219         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 220                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 221                 return 0;
 222         }
 223
 224         if (rphy) {
 225                 q = blk_init_queue(sas_non_host_smp_request, NULL);
 226                 dev = &rphy->dev;
 227                 name = dev_name(dev);
 228                 release = NULL;
 229         } else {
 230                 q = blk_init_queue(sas_host_smp_request, NULL);
 231                 dev = &shost->shost_gendev;
 232                 snprintf(namebuf, sizeof(namebuf),
 233                          "sas_host%d", shost->host_no);
 234                 name = namebuf;
 235                 release = sas_host_release;
 236         }
 237         if (!q)
 238                 return -ENOMEM;
 239
 240         error = bsg_register_queue(q, dev, name, release);
 241         if (error) {
 242                 blk_cleanup_queue(q);
 243                 return -ENOMEM;
 244         }
 245
 246         if (rphy)
 247                 rphy->q = q;
 248         else
 249                 to_sas_host_attrs(shost)->q = q;
 250
 251         if (rphy)
 252                 q->queuedata = rphy;
 253         else
 254                 q->queuedata = shost;
 255
 256         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
 257         return 0;
 258 }
 259
 260 static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
 261 {
 262         struct request_queue *q;
 263
 264         if (rphy)
 265                 q = rphy->q;
 266         else
 267                 q = to_sas_host_attrs(shost)->q;
 268
 269         if (!q)
 270                 return;
 271
 272         bsg_unregister_queue(q);
 273 }
 274
 275 /*
 276  * SAS host attributes
 277  */
 278
 279 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 280                           struct device *cdev)
 281 {
 282         struct Scsi_Host *shost = dev_to_shost(dev);
 283         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 284
 285         INIT_LIST_HEAD(&sas_host->rphy_list);
 286         mutex_init(&sas_host->lock);
 287         sas_host->next_target_id = 0;
 288         sas_host->next_expander_id = 0;
 289         sas_host->next_port_id = 0;
 290
 291         if (sas_bsg_initialize(shost, NULL))
 292                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 293                            shost->host_no);
 294
 295         return 0;
 296 }
 297
 298 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 299                            struct device *cdev)
 300 {
 301         struct Scsi_Host *shost = dev_to_shost(dev);
 302
 303         sas_bsg_remove(shost, NULL);
 304
 305         return 0;
 306 }
 307
 308 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 309                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 310
 311 static int sas_host_match(struct attribute_container *cont,
 312                             struct device *dev)
 313 {
 314         struct Scsi_Host *shost;
 315         struct sas_internal *i;
 316
 317         if (!scsi_is_host_device(dev))
 318                 return 0;
 319         shost = dev_to_shost(dev);
 320
 321         if (!shost->transportt)
 322                 return 0;
 323         if (shost->transportt->host_attrs.ac.class !=
 324                         &sas_host_class.class)
 325                 return 0;
 326
 327         i = to_sas_internal(shost->transportt);
 328         return &i->t.host_attrs.ac == cont;
 329 }
 330
 331 static int do_sas_phy_delete(struct device *dev, void *data)
 332 {
 333         int pass = (int)(unsigned long)data;
 334
 335         if (pass == 0 && scsi_is_sas_port(dev))
 336                 sas_port_delete(dev_to_sas_port(dev));
 337         else if (pass == 1 && scsi_is_sas_phy(dev))
 338                 sas_phy_delete(dev_to_phy(dev));
 339         return 0;
 340 }
 341
 342 /**
 343  * sas_remove_children  -  tear down a devices SAS data structures
 344  * @dev:        device belonging to the sas object
 345  *
 346  * Removes all SAS PHYs and remote PHYs for a given object
 347  */
 348 void sas_remove_children(struct device *dev)
 349 {
 350         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 351         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 352 }
 353 EXPORT_SYMBOL(sas_remove_children);
 354
 355 /**
 356  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 357  * @shost:      Scsi Host that is torn down
 358  *
 359  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
 360  * Must be called just before scsi_remove_host for SAS HBAs.
 361  */
 362 void sas_remove_host(struct Scsi_Host *shost)
 363 {
 364         sas_remove_children(&shost->shost_gendev);
 365 }
 366 EXPORT_SYMBOL(sas_remove_host);
 367
 368 /**
 369  * sas_tlr_supported - checking TLR bit in vpd 0x90
 370  * @sdev: scsi device struct
 371  *
 372  * Check Transport Layer Retries are supported or not.
 373  * If vpd page 0x90 is present, TRL is supported.
 374  *
 375  */
 376 unsigned int
 377 sas_tlr_supported(struct scsi_device *sdev)
 378 {
 379         const int vpd_len = 32;
 380         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 381         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 382         int ret = 0;
 383
 384         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 385                 goto out;
 386
 387         /*
 388          * Magic numbers: the VPD Protocol page (0x90)
 389          * has a 4 byte header and then one entry per device port
 390          * the TLR bit is at offset 8 on each port entry
 391          * if we take the first port, that's at total offset 12
 392          */
 393         ret = buffer[12] & 0x01;
 394
 395  out:
 396         kfree(buffer);
 397         rdev->tlr_supported = ret;
 398         return ret;
 399
 400 }
 401 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 402
 403 /**
 404  * sas_disable_tlr - setting TLR flags
 405  * @sdev: scsi device struct
 406  *
 407  * Seting tlr_enabled flag to 0.
 408  *
 409  */
 410 void
 411 sas_disable_tlr(struct scsi_device *sdev)
 412 {
 413         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 414
 415         rdev->tlr_enabled = 0;
 416 }
 417 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 418
 419 /**
 420  * sas_enable_tlr - setting TLR flags
 421  * @sdev: scsi device struct
 422  *
 423  * Seting tlr_enabled flag 1.
 424  *
 425  */
 426 void sas_enable_tlr(struct scsi_device *sdev)
 427 {
 428         unsigned int tlr_supported = 0;
 429         tlr_supported  = sas_tlr_supported(sdev);
 430
 431         if (tlr_supported) {
 432                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 433
 434                 rdev->tlr_enabled = 1;
 435         }
 436
 437         return;
 438 }
 439 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 440
 441 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 442 {
 443         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 444         return rdev->tlr_enabled;
 445 }
 446 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 447
 448 /*
 449  * SAS Phy attributes
 450  */
 451
 452 #define sas_phy_show_simple(field, name, format_string, cast)           \
 453 static ssize_t                                                          \
 454 show_sas_phy_##name(struct device *dev,                                 \
 455                     struct device_attribute *attr, char *buf)           \
 456 {                                                                       \
 457         struct sas_phy *phy = transport_class_to_phy(dev);              \
 458                                                                         \
 459         return snprintf(buf, 20, format_string, cast phy->field);       \
 460 }
 461
 462 #define sas_phy_simple_attr(field, name, format_string, type)           \
 463         sas_phy_show_simple(field, name, format_string, (type)) \
 464 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 465
 466 #define sas_phy_show_protocol(field, name)                              \
 467 static ssize_t                                                          \
 468 show_sas_phy_##name(struct device *dev,                                 \
 469                     struct device_attribute *attr, char *buf)           \
 470 {                                                                       \
 471         struct sas_phy *phy = transport_class_to_phy(dev);              \
 472                                                                         \
 473         if (!phy->field)                                                \
 474                 return snprintf(buf, 20, "none\n");                     \
 475         return get_sas_protocol_names(phy->field, buf);         \
 476 }
 477
 478 #define sas_phy_protocol_attr(field, name)                              \
 479         sas_phy_show_protocol(field, name)                              \
 480 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 481
 482 #define sas_phy_show_linkspeed(field)                                   \
 483 static ssize_t                                                          \
 484 show_sas_phy_##field(struct device *dev,                                \
 485                      struct device_attribute *attr, char *buf)          \
 486 {                                                                       \
 487         struct sas_phy *phy = transport_class_to_phy(dev);              \
 488                                                                         \
 489         return get_sas_linkspeed_names(phy->field, buf);                \
 490 }
 491
 492 /* Fudge to tell if we're minimum or maximum */
 493 #define sas_phy_store_linkspeed(field)                                  \
 494 static ssize_t                                                          \
 495 store_sas_phy_##field(struct device *dev,                               \
 496                       struct device_attribute *attr,                    \
 497                       const char *buf,  size_t count)                   \
 498 {                                                                       \
 499         struct sas_phy *phy = transport_class_to_phy(dev);              \
 500         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 501         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 502         u32 value;                                                      \
 503         struct sas_phy_linkrates rates = {0};                           \
 504         int error;                                                      \
 505                                                                         \
 506         error = set_sas_linkspeed_names(&value, buf);                   \
 507         if (error)                                                      \
 508                 return error;                                           \
 509         rates.field = value;                                            \
 510         error = i->f->set_phy_speed(phy, &rates);                       \
 511                                                                         \
 512         return error ? error : count;                                   \
 513 }
 514
 515 #define sas_phy_linkspeed_rw_attr(field)                                \
 516         sas_phy_show_linkspeed(field)                                   \
 517         sas_phy_store_linkspeed(field)                                  \
 518 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 519         store_sas_phy_##field)
 520
 521 #define sas_phy_linkspeed_attr(field)                                   \
 522         sas_phy_show_linkspeed(field)                                   \
 523 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 524
 525
 526 #define sas_phy_show_linkerror(field)                                   \
 527 static ssize_t                                                          \
 528 show_sas_phy_##field(struct device *dev,                                \
 529                      struct device_attribute *attr, char *buf)          \
 530 {                                                                       \
 531         struct sas_phy *phy = transport_class_to_phy(dev);              \
 532         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 533         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 534         int error;                                                      \
 535                                                                         \
 536         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 537         if (error)                                                      \
 538                 return error;                                           \
 539         return snprintf(buf, 20, "%u\n", phy->field);                   \
 540 }
 541
 542 #define sas_phy_linkerror_attr(field)                                   \
 543         sas_phy_show_linkerror(field)                                   \
 544 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 545
 546
 547 static ssize_t
 548 show_sas_device_type(struct device *dev,
 549                      struct device_attribute *attr, char *buf)
 550 {
 551         struct sas_phy *phy = transport_class_to_phy(dev);
 552
 553         if (!phy->identify.device_type)
 554                 return snprintf(buf, 20, "none\n");
 555         return get_sas_device_type_names(phy->identify.device_type, buf);
 556 }
 557 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 558
 559 static ssize_t do_sas_phy_enable(struct device *dev,
 560                 size_t count, int enable)
 561 {
 562         struct sas_phy *phy = transport_class_to_phy(dev);
 563         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 564         struct sas_internal *i = to_sas_internal(shost->transportt);
 565         int error;
 566
 567         error = i->f->phy_enable(phy, enable);
 568         if (error)
 569                 return error;
 570         phy->enabled = enable;
 571         return count;
 572 };
 573
 574 static ssize_t
 575 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 576                      const char *buf, size_t count)
 577 {
 578         if (count < 1)
 579                 return -EINVAL;
 580
 581         switch (buf[0]) {
 582         case '0':
 583                 do_sas_phy_enable(dev, count, 0);
 584                 break;
 585         case '1':
 586                 do_sas_phy_enable(dev, count, 1);
 587                 break;
 588         default:
 589                 return -EINVAL;
 590         }
 591
 592         return count;
 593 }
 594
 595 static ssize_t
 596 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 597                     char *buf)
 598 {
 599         struct sas_phy *phy = transport_class_to_phy(dev);
 600
 601         return snprintf(buf, 20, "%d", phy->enabled);
 602 }
 603
 604 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 605                          store_sas_phy_enable);
 606
 607 static ssize_t
 608 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 609 {
 610         struct sas_phy *phy = transport_class_to_phy(dev);
 611         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 612         struct sas_internal *i = to_sas_internal(shost->transportt);
 613         int error;
 614
 615         error = i->f->phy_reset(phy, hard_reset);
 616         if (error)
 617                 return error;
 618         phy->enabled = 1;
 619         return count;
 620 };
 621
 622 static ssize_t
 623 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 624                      const char *buf, size_t count)
 625 {
 626         return do_sas_phy_reset(dev, count, 0);
 627 }
 628 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 629
 630 static ssize_t
 631 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 632                      const char *buf, size_t count)
 633 {
 634         return do_sas_phy_reset(dev, count, 1);
 635 }
 636 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 637
 638 sas_phy_protocol_attr(identify.initiator_port_protocols,
 639                 initiator_port_protocols);
 640 sas_phy_protocol_attr(identify.target_port_protocols,
 641                 target_port_protocols);
 642 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 643                 unsigned long long);
 644 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 645 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 646 sas_phy_linkspeed_attr(negotiated_linkrate);
 647 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 648 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 649 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 650 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 651 sas_phy_linkerror_attr(invalid_dword_count);
 652 sas_phy_linkerror_attr(running_disparity_error_count);
 653 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 654 sas_phy_linkerror_attr(phy_reset_problem_count);
 655
 656 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 657                          struct device *cdev)
 658 {
 659         struct sas_phy *phy = dev_to_phy(dev);
 660         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 661         struct sas_internal *i = to_sas_internal(shost->transportt);
 662
 663         if (i->f->phy_setup)
 664                 i->f->phy_setup(phy);
 665
 666         return 0;
 667 }
 668
 669 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 670                 "sas_phy", sas_phy_setup, NULL, NULL);
 671
 672 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 673 {
 674         struct Scsi_Host *shost;
 675         struct sas_internal *i;
 676
 677         if (!scsi_is_sas_phy(dev))
 678                 return 0;
 679         shost = dev_to_shost(dev->parent);
 680
 681         if (!shost->transportt)
 682                 return 0;
 683         if (shost->transportt->host_attrs.ac.class !=
 684                         &sas_host_class.class)
 685                 return 0;
 686
 687         i = to_sas_internal(shost->transportt);
 688         return &i->phy_attr_cont.ac == cont;
 689 }
 690
 691 static void sas_phy_release(struct device *dev)
 692 {
 693         struct sas_phy *phy = dev_to_phy(dev);
 694         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 695         struct sas_internal *i = to_sas_internal(shost->transportt);
 696
 697         if (i->f->phy_release)
 698                 i->f->phy_release(phy);
 699         put_device(dev->parent);
 700         kfree(phy);
 701 }
 702
 703 /**
 704  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 705  * @parent:     Parent device
 706  * @number:     Phy index
 707  *
 708  * Allocates an SAS PHY structure.  It will be added in the device tree
 709  * below the device specified by @parent, which has to be either a Scsi_Host
 710  * or sas_rphy.
 711  *
 712  * Returns:
 713  *      SAS PHY allocated or %NULL if the allocation failed.
 714  */
 715 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 716 {
 717         struct Scsi_Host *shost = dev_to_shost(parent);
 718         struct sas_phy *phy;
 719
 720         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 721         if (!phy)
 722                 return NULL;
 723
 724         phy->number = number;
 725         phy->enabled = 1;
 726
 727         device_initialize(&phy->dev);
 728         phy->dev.parent = get_device(parent);
 729         phy->dev.release = sas_phy_release;
 730         INIT_LIST_HEAD(&phy->port_siblings);
 731         if (scsi_is_sas_expander_device(parent)) {
 732                 struct sas_rphy *rphy = dev_to_rphy(parent);
 733                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 734                         rphy->scsi_target_id, number);
 735         } else
 736                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 737
 738         transport_setup_device(&phy->dev);
 739
 740         return phy;
 741 }
 742 EXPORT_SYMBOL(sas_phy_alloc);
 743
 744 /**
 745  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 746  * @phy:        The PHY to be added
 747  *
 748  * Publishes a SAS PHY to the rest of the system.
 749  */
 750 int sas_phy_add(struct sas_phy *phy)
 751 {
 752         int error;
 753
 754         error = device_add(&phy->dev);
 755         if (!error) {
 756                 transport_add_device(&phy->dev);
 757                 transport_configure_device(&phy->dev);
 758         }
 759
 760         return error;
 761 }
 762 EXPORT_SYMBOL(sas_phy_add);
 763
 764 /**
 765  * sas_phy_free  -  free a SAS PHY
 766  * @phy:        SAS PHY to free
 767  *
 768  * Frees the specified SAS PHY.
 769  *
 770  * Note:
 771  *   This function must only be called on a PHY that has not
 772  *   successfully been added using sas_phy_add().
 773  */
 774 void sas_phy_free(struct sas_phy *phy)
 775 {
 776         transport_destroy_device(&phy->dev);
 777         put_device(&phy->dev);
 778 }
 779 EXPORT_SYMBOL(sas_phy_free);
 780
 781 /**
 782  * sas_phy_delete  -  remove SAS PHY
 783  * @phy:        SAS PHY to remove
 784  *
 785  * Removes the specified SAS PHY.  If the SAS PHY has an
 786  * associated remote PHY it is removed before.
 787  */
 788 void
 789 sas_phy_delete(struct sas_phy *phy)
 790 {
 791         struct device *dev = &phy->dev;
 792
 793         /* this happens if the phy is still part of a port when deleted */
 794         BUG_ON(!list_empty(&phy->port_siblings));
 795
 796         transport_remove_device(dev);
 797         device_del(dev);
 798         transport_destroy_device(dev);
 799         put_device(dev);
 800 }
 801 EXPORT_SYMBOL(sas_phy_delete);
 802
 803 /**
 804  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 805  * @dev:        device to check
 806  *
 807  * Returns:
 808  *      %1 if the device represents a SAS PHY, %0 else
 809  */
 810 int scsi_is_sas_phy(const struct device *dev)
 811 {
 812         return dev->release == sas_phy_release;
 813 }
 814 EXPORT_SYMBOL(scsi_is_sas_phy);
 815
 816 /*
 817  * SAS Port attributes
 818  */
 819 #define sas_port_show_simple(field, name, format_string, cast)          \
 820 static ssize_t                                                          \
 821 show_sas_port_##name(struct device *dev,                                \
 822                      struct device_attribute *attr, char *buf)          \
 823 {                                                                       \
 824         struct sas_port *port = transport_class_to_sas_port(dev);       \
 825                                                                         \
 826         return snprintf(buf, 20, format_string, cast port->field);      \
 827 }
 828
 829 #define sas_port_simple_attr(field, name, format_string, type)          \
 830         sas_port_show_simple(field, name, format_string, (type))        \
 831 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 832
 833 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 834
 835 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 836                                "sas_port", NULL, NULL, NULL);
 837
 838 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 839 {
 840         struct Scsi_Host *shost;
 841         struct sas_internal *i;
 842
 843         if (!scsi_is_sas_port(dev))
 844                 return 0;
 845         shost = dev_to_shost(dev->parent);
 846
 847         if (!shost->transportt)
 848                 return 0;
 849         if (shost->transportt->host_attrs.ac.class !=
 850                         &sas_host_class.class)
 851                 return 0;
 852
 853         i = to_sas_internal(shost->transportt);
 854         return &i->port_attr_cont.ac == cont;
 855 }
 856
 857
 858 static void sas_port_release(struct device *dev)
 859 {
 860         struct sas_port *port = dev_to_sas_port(dev);
 861
 862         BUG_ON(!list_empty(&port->phy_list));
 863
 864         put_device(dev->parent);
 865         kfree(port);
 866 }
 867
 868 static void sas_port_create_link(struct sas_port *port,
 869                                  struct sas_phy *phy)
 870 {
 871         int res;
 872
 873         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 874                                 dev_name(&phy->dev));
 875         if (res)
 876                 goto err;
 877         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 878         if (res)
 879                 goto err;
 880         return;
 881 err:
 882         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 883                __func__, res);
 884 }
 885
 886 static void sas_port_delete_link(struct sas_port *port,
 887                                  struct sas_phy *phy)
 888 {
 889         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 890         sysfs_remove_link(&phy->dev.kobj, "port");
 891 }
 892
 893 /** sas_port_alloc - allocate and initialize a SAS port structure
 894  *
 895  * @parent:     parent device
 896  * @port_id:    port number
 897  *
 898  * Allocates a SAS port structure.  It will be added to the device tree
 899  * below the device specified by @parent which must be either a Scsi_Host
 900  * or a sas_expander_device.
 901  *
 902  * Returns %NULL on error
 903  */
 904 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 905 {
 906         struct Scsi_Host *shost = dev_to_shost(parent);
 907         struct sas_port *port;
 908
 909         port = kzalloc(sizeof(*port), GFP_KERNEL);
 910         if (!port)
 911                 return NULL;
 912
 913         port->port_identifier = port_id;
 914
 915         device_initialize(&port->dev);
 916
 917         port->dev.parent = get_device(parent);
 918         port->dev.release = sas_port_release;
 919
 920         mutex_init(&port->phy_list_mutex);
 921         INIT_LIST_HEAD(&port->phy_list);
 922
 923         if (scsi_is_sas_expander_device(parent)) {
 924                 struct sas_rphy *rphy = dev_to_rphy(parent);
 925                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 926                              rphy->scsi_target_id, port->port_identifier);
 927         } else
 928                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 929                              port->port_identifier);
 930
 931         transport_setup_device(&port->dev);
 932
 933         return port;
 934 }
 935 EXPORT_SYMBOL(sas_port_alloc);
 936
 937 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 938  *
 939  * @parent:     parent device
 940  *
 941  * Allocates a SAS port structure and a number to go with it.  This
 942  * interface is really for adapters where the port number has no
 943  * meansing, so the sas class should manage them.  It will be added to
 944  * the device tree below the device specified by @parent which must be
 945  * either a Scsi_Host or a sas_expander_device.
 946  *
 947  * Returns %NULL on error
 948  */
 949 struct sas_port *sas_port_alloc_num(struct device *parent)
 950 {
 951         int index;
 952         struct Scsi_Host *shost = dev_to_shost(parent);
 953         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 954
 955         /* FIXME: use idr for this eventually */
 956         mutex_lock(&sas_host->lock);
 957         if (scsi_is_sas_expander_device(parent)) {
 958                 struct sas_rphy *rphy = dev_to_rphy(parent);
 959                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 960
 961                 index = exp->next_port_id++;
 962         } else
 963                 index = sas_host->next_port_id++;
 964         mutex_unlock(&sas_host->lock);
 965         return sas_port_alloc(parent, index);
 966 }
 967 EXPORT_SYMBOL(sas_port_alloc_num);
 968
 969 /**
 970  * sas_port_add - add a SAS port to the device hierarchy
 971  * @port:       port to be added
 972  *
 973  * publishes a port to the rest of the system
 974  */
 975 int sas_port_add(struct sas_port *port)
 976 {
 977         int error;
 978
 979         /* No phys should be added until this is made visible */
 980         BUG_ON(!list_empty(&port->phy_list));
 981
 982         error = device_add(&port->dev);
 983
 984         if (error)
 985                 return error;
 986
 987         transport_add_device(&port->dev);
 988         transport_configure_device(&port->dev);
 989
 990         return 0;
 991 }
 992 EXPORT_SYMBOL(sas_port_add);
 993
 994 /**
 995  * sas_port_free  -  free a SAS PORT
 996  * @port:       SAS PORT to free
 997  *
 998  * Frees the specified SAS PORT.
 999  *
1000  * Note:
1001  *   This function must only be called on a PORT that has not
1002  *   successfully been added using sas_port_add().
1003  */
1004 void sas_port_free(struct sas_port *port)
1005 {
1006         transport_destroy_device(&port->dev);
1007         put_device(&port->dev);
1008 }
1009 EXPORT_SYMBOL(sas_port_free);
1010
1011 /**
1012  * sas_port_delete  -  remove SAS PORT
1013  * @port:       SAS PORT to remove
1014  *
1015  * Removes the specified SAS PORT.  If the SAS PORT has an
1016  * associated phys, unlink them from the port as well.
1017  */
1018 void sas_port_delete(struct sas_port *port)
1019 {
1020         struct device *dev = &port->dev;
1021         struct sas_phy *phy, *tmp_phy;
1022
1023         if (port->rphy) {
1024                 sas_rphy_delete(port->rphy);
1025                 port->rphy = NULL;
1026         }
1027
1028         mutex_lock(&port->phy_list_mutex);
1029         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1030                                  port_siblings) {
1031                 sas_port_delete_link(port, phy);
1032                 list_del_init(&phy->port_siblings);
1033         }
1034         mutex_unlock(&port->phy_list_mutex);
1035
1036         if (port->is_backlink) {
1037                 struct device *parent = port->dev.parent;
1038
1039                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1040                 port->is_backlink = 0;
1041         }
1042
1043         transport_remove_device(dev);
1044         device_del(dev);
1045         transport_destroy_device(dev);
1046         put_device(dev);
1047 }
1048 EXPORT_SYMBOL(sas_port_delete);
1049
1050 /**
1051  * scsi_is_sas_port -  check if a struct device represents a SAS port
1052  * @dev:        device to check
1053  *
1054  * Returns:
1055  *      %1 if the device represents a SAS Port, %0 else
1056  */
1057 int scsi_is_sas_port(const struct device *dev)
1058 {
1059         return dev->release == sas_port_release;
1060 }
1061 EXPORT_SYMBOL(scsi_is_sas_port);
1062
1063 /**
1064  * sas_port_get_phy - try to take a reference on a port member
1065  * @port: port to check
1066  */
1067 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1068 {
1069         struct sas_phy *phy;
1070
1071         mutex_lock(&port->phy_list_mutex);
1072         if (list_empty(&port->phy_list))
1073                 phy = NULL;
1074         else {
1075                 struct list_head *ent = port->phy_list.next;
1076
1077                 phy = list_entry(ent, typeof(*phy), port_siblings);
1078                 get_device(&phy->dev);
1079         }
1080         mutex_unlock(&port->phy_list_mutex);
1081
1082         return phy;
1083 }
1084 EXPORT_SYMBOL(sas_port_get_phy);
1085
1086 /**
1087  * sas_port_add_phy - add another phy to a port to form a wide port
1088  * @port:       port to add the phy to
1089  * @phy:        phy to add
1090  *
1091  * When a port is initially created, it is empty (has no phys).  All
1092  * ports must have at least one phy to operated, and all wide ports
1093  * must have at least two.  The current code makes no difference
1094  * between ports and wide ports, but the only object that can be
1095  * connected to a remote device is a port, so ports must be formed on
1096  * all devices with phys if they're connected to anything.
1097  */
1098 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1099 {
1100         mutex_lock(&port->phy_list_mutex);
1101         if (unlikely(!list_empty(&phy->port_siblings))) {
1102                 /* make sure we're already on this port */
1103                 struct sas_phy *tmp;
1104
1105                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1106                         if (tmp == phy)
1107                                 break;
1108                 /* If this trips, you added a phy that was already
1109                  * part of a different port */
1110                 if (unlikely(tmp != phy)) {
1111                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1112                                    dev_name(&phy->dev));
1113                         BUG();
1114                 }
1115         } else {
1116                 sas_port_create_link(port, phy);
1117                 list_add_tail(&phy->port_siblings, &port->phy_list);
1118                 port->num_phys++;
1119         }
1120         mutex_unlock(&port->phy_list_mutex);
1121 }
1122 EXPORT_SYMBOL(sas_port_add_phy);
1123
1124 /**
1125  * sas_port_delete_phy - remove a phy from a port or wide port
1126  * @port:       port to remove the phy from
1127  * @phy:        phy to remove
1128  *
1129  * This operation is used for tearing down ports again.  It must be
1130  * done to every port or wide port before calling sas_port_delete.
1131  */
1132 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1133 {
1134         mutex_lock(&port->phy_list_mutex);
1135         sas_port_delete_link(port, phy);
1136         list_del_init(&phy->port_siblings);
1137         port->num_phys--;
1138         mutex_unlock(&port->phy_list_mutex);
1139 }
1140 EXPORT_SYMBOL(sas_port_delete_phy);
1141
1142 void sas_port_mark_backlink(struct sas_port *port)
1143 {
1144         int res;
1145         struct device *parent = port->dev.parent->parent->parent;
1146
1147         if (port->is_backlink)
1148                 return;
1149         port->is_backlink = 1;
1150         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1151                                 dev_name(parent));
1152         if (res)
1153                 goto err;
1154         return;
1155 err:
1156         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1157                __func__, res);
1158
1159 }
1160 EXPORT_SYMBOL(sas_port_mark_backlink);
1161
1162 /*
1163  * SAS remote PHY attributes.
1164  */
1165
1166 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1167 static ssize_t                                                          \
1168 show_sas_rphy_##name(struct device *dev,                                \
1169                      struct device_attribute *attr, char *buf)          \
1170 {                                                                       \
1171         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1172                                                                         \
1173         return snprintf(buf, 20, format_string, cast rphy->field);      \
1174 }
1175
1176 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1177         sas_rphy_show_simple(field, name, format_string, (type))        \
1178 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1179                 show_sas_rphy_##name, NULL)
1180
1181 #define sas_rphy_show_protocol(field, name)                             \
1182 static ssize_t                                                          \
1183 show_sas_rphy_##name(struct device *dev,                                \
1184                      struct device_attribute *attr, char *buf)          \
1185 {                                                                       \
1186         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1187                                                                         \
1188         if (!rphy->field)                                       \
1189                 return snprintf(buf, 20, "none\n");                     \
1190         return get_sas_protocol_names(rphy->field, buf);        \
1191 }
1192
1193 #define sas_rphy_protocol_attr(field, name)                             \
1194         sas_rphy_show_protocol(field, name)                             \
1195 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1196                 show_sas_rphy_##name, NULL)
1197
1198 static ssize_t
1199 show_sas_rphy_device_type(struct device *dev,
1200                           struct device_attribute *attr, char *buf)
1201 {
1202         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1203
1204         if (!rphy->identify.device_type)
1205                 return snprintf(buf, 20, "none\n");
1206         return get_sas_device_type_names(
1207                         rphy->identify.device_type, buf);
1208 }
1209
1210 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1211                 show_sas_rphy_device_type, NULL);
1212
1213 static ssize_t
1214 show_sas_rphy_enclosure_identifier(struct device *dev,
1215                                    struct device_attribute *attr, char *buf)
1216 {
1217         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1218         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1219         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1220         struct sas_internal *i = to_sas_internal(shost->transportt);
1221         u64 identifier;
1222         int error;
1223
1224         /*
1225          * Only devices behind an expander are supported, because the
1226          * enclosure identifier is a SMP feature.
1227          */
1228         if (scsi_is_sas_phy_local(phy))
1229                 return -EINVAL;
1230
1231         error = i->f->get_enclosure_identifier(rphy, &identifier);
1232         if (error)
1233                 return error;
1234         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1235 }
1236
1237 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1238                 show_sas_rphy_enclosure_identifier, NULL);
1239
1240 static ssize_t
1241 show_sas_rphy_bay_identifier(struct device *dev,
1242                              struct device_attribute *attr, char *buf)
1243 {
1244         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1245         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1246         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1247         struct sas_internal *i = to_sas_internal(shost->transportt);
1248         int val;
1249
1250         if (scsi_is_sas_phy_local(phy))
1251                 return -EINVAL;
1252
1253         val = i->f->get_bay_identifier(rphy);
1254         if (val < 0)
1255                 return val;
1256         return sprintf(buf, "%d\n", val);
1257 }
1258
1259 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1260                 show_sas_rphy_bay_identifier, NULL);
1261
1262 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1263                 initiator_port_protocols);
1264 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1265 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1266                 unsigned long long);
1267 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1268
1269 /* only need 8 bytes of data plus header (4 or 8) */
1270 #define BUF_SIZE 64
1271
1272 int sas_read_port_mode_page(struct scsi_device *sdev)
1273 {
1274         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1275         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1276         struct scsi_mode_data mode_data;
1277         int res, error;
1278
1279         if (!buffer)
1280                 return -ENOMEM;
1281
1282         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1283                               &mode_data, NULL);
1284
1285         error = -EINVAL;
1286         if (!scsi_status_is_good(res))
1287                 goto out;
1288
1289         msdata = buffer +  mode_data.header_length +
1290                 mode_data.block_descriptor_length;
1291
1292         if (msdata - buffer > BUF_SIZE - 8)
1293                 goto out;
1294
1295         error = 0;
1296
1297         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1298         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1299         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1300
1301  out:
1302         kfree(buffer);
1303         return error;
1304 }
1305 EXPORT_SYMBOL(sas_read_port_mode_page);
1306
1307 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1308                                "sas_end_device", NULL, NULL, NULL);
1309
1310 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1311 static ssize_t                                                          \
1312 show_sas_end_dev_##name(struct device *dev,                             \
1313                         struct device_attribute *attr, char *buf)       \
1314 {                                                                       \
1315         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1316         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1317                                                                         \
1318         return snprintf(buf, 20, format_string, cast rdev->field);      \
1319 }
1320
1321 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1322         sas_end_dev_show_simple(field, name, format_string, (type))     \
1323 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1324                 show_sas_end_dev_##name, NULL)
1325
1326 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1327 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1328                         "%d\n", int);
1329 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1330                         "%d\n", int);
1331 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1332                         "%d\n", int);
1333 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1334                         "%d\n", int);
1335
1336 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1337                                "sas_expander", NULL, NULL, NULL);
1338
1339 #define sas_expander_show_simple(field, name, format_string, cast)      \
1340 static ssize_t                                                          \
1341 show_sas_expander_##name(struct device *dev,                            \
1342                          struct device_attribute *attr, char *buf)      \
1343 {                                                                       \
1344         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1345         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1346                                                                         \
1347         return snprintf(buf, 20, format_string, cast edev->field);      \
1348 }
1349
1350 #define sas_expander_simple_attr(field, name, format_string, type)      \
1351         sas_expander_show_simple(field, name, format_string, (type))    \
1352 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1353                 show_sas_expander_##name, NULL)
1354
1355 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1356 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1357 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1358 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1359                          "%s\n", char *);
1360 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1361 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1362                          unsigned int);
1363 sas_expander_simple_attr(level, level, "%d\n", int);
1364
1365 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1366                 "sas_device", NULL, NULL, NULL);
1367
1368 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1369 {
1370         struct Scsi_Host *shost;
1371         struct sas_internal *i;
1372
1373         if (!scsi_is_sas_rphy(dev))
1374                 return 0;
1375         shost = dev_to_shost(dev->parent->parent);
1376
1377         if (!shost->transportt)
1378                 return 0;
1379         if (shost->transportt->host_attrs.ac.class !=
1380                         &sas_host_class.class)
1381                 return 0;
1382
1383         i = to_sas_internal(shost->transportt);
1384         return &i->rphy_attr_cont.ac == cont;
1385 }
1386
1387 static int sas_end_dev_match(struct attribute_container *cont,
1388                              struct device *dev)
1389 {
1390         struct Scsi_Host *shost;
1391         struct sas_internal *i;
1392         struct sas_rphy *rphy;
1393
1394         if (!scsi_is_sas_rphy(dev))
1395                 return 0;
1396         shost = dev_to_shost(dev->parent->parent);
1397         rphy = dev_to_rphy(dev);
1398
1399         if (!shost->transportt)
1400                 return 0;
1401         if (shost->transportt->host_attrs.ac.class !=
1402                         &sas_host_class.class)
1403                 return 0;
1404
1405         i = to_sas_internal(shost->transportt);
1406         return &i->end_dev_attr_cont.ac == cont &&
1407                 rphy->identify.device_type == SAS_END_DEVICE;
1408 }
1409
1410 static int sas_expander_match(struct attribute_container *cont,
1411                               struct device *dev)
1412 {
1413         struct Scsi_Host *shost;
1414         struct sas_internal *i;
1415         struct sas_rphy *rphy;
1416
1417         if (!scsi_is_sas_rphy(dev))
1418                 return 0;
1419         shost = dev_to_shost(dev->parent->parent);
1420         rphy = dev_to_rphy(dev);
1421
1422         if (!shost->transportt)
1423                 return 0;
1424         if (shost->transportt->host_attrs.ac.class !=
1425                         &sas_host_class.class)
1426                 return 0;
1427
1428         i = to_sas_internal(shost->transportt);
1429         return &i->expander_attr_cont.ac == cont &&
1430                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1431                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1432 }
1433
1434 static void sas_expander_release(struct device *dev)
1435 {
1436         struct sas_rphy *rphy = dev_to_rphy(dev);
1437         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1438
1439         if (rphy->q)
1440                 blk_cleanup_queue(rphy->q);
1441
1442         put_device(dev->parent);
1443         kfree(edev);
1444 }
1445
1446 static void sas_end_device_release(struct device *dev)
1447 {
1448         struct sas_rphy *rphy = dev_to_rphy(dev);
1449         struct sas_end_device *edev = rphy_to_end_device(rphy);
1450
1451         if (rphy->q)
1452                 blk_cleanup_queue(rphy->q);
1453
1454         put_device(dev->parent);
1455         kfree(edev);
1456 }
1457
1458 /**
1459  * sas_rphy_initialize - common rphy intialization
1460  * @rphy:       rphy to initialise
1461  *
1462  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1463  * initialise the common rphy component of each.
1464  */
1465 static void sas_rphy_initialize(struct sas_rphy *rphy)
1466 {
1467         INIT_LIST_HEAD(&rphy->list);
1468 }
1469
1470 /**
1471  * sas_end_device_alloc - allocate an rphy for an end device
1472  * @parent: which port
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_end_device_alloc(struct sas_port *parent)
1480 {
1481         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1482         struct sas_end_device *rdev;
1483
1484         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1485         if (!rdev) {
1486                 return NULL;
1487         }
1488
1489         device_initialize(&rdev->rphy.dev);
1490         rdev->rphy.dev.parent = get_device(&parent->dev);
1491         rdev->rphy.dev.release = sas_end_device_release;
1492         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1493                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1494                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1495                              shost->host_no, rphy->scsi_target_id,
1496                              parent->port_identifier);
1497         } else
1498                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1499                              shost->host_no, parent->port_identifier);
1500         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1501         sas_rphy_initialize(&rdev->rphy);
1502         transport_setup_device(&rdev->rphy.dev);
1503
1504         return &rdev->rphy;
1505 }
1506 EXPORT_SYMBOL(sas_end_device_alloc);
1507
1508 /**
1509  * sas_expander_alloc - allocate an rphy for an end device
1510  * @parent: which port
1511  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1512  *
1513  * Allocates an SAS remote PHY structure, connected to @parent.
1514  *
1515  * Returns:
1516  *      SAS PHY allocated or %NULL if the allocation failed.
1517  */
1518 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1519                                     enum sas_device_type type)
1520 {
1521         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1522         struct sas_expander_device *rdev;
1523         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1524
1525         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1526                type != SAS_FANOUT_EXPANDER_DEVICE);
1527
1528         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1529         if (!rdev) {
1530                 return NULL;
1531         }
1532
1533         device_initialize(&rdev->rphy.dev);
1534         rdev->rphy.dev.parent = get_device(&parent->dev);
1535         rdev->rphy.dev.release = sas_expander_release;
1536         mutex_lock(&sas_host->lock);
1537         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1538         mutex_unlock(&sas_host->lock);
1539         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1540                      shost->host_no, rdev->rphy.scsi_target_id);
1541         rdev->rphy.identify.device_type = type;
1542         sas_rphy_initialize(&rdev->rphy);
1543         transport_setup_device(&rdev->rphy.dev);
1544
1545         return &rdev->rphy;
1546 }
1547 EXPORT_SYMBOL(sas_expander_alloc);
1548
1549 /**
1550  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1551  * @rphy:       The remote PHY to be added
1552  *
1553  * Publishes a SAS remote PHY to the rest of the system.
1554  */
1555 int sas_rphy_add(struct sas_rphy *rphy)
1556 {
1557         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1558         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1559         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1560         struct sas_identify *identify = &rphy->identify;
1561         int error;
1562
1563         if (parent->rphy)
1564                 return -ENXIO;
1565         parent->rphy = rphy;
1566
1567         error = device_add(&rphy->dev);
1568         if (error)
1569                 return error;
1570         transport_add_device(&rphy->dev);
1571         transport_configure_device(&rphy->dev);
1572         if (sas_bsg_initialize(shost, rphy))
1573                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1574
1575
1576         mutex_lock(&sas_host->lock);
1577         list_add_tail(&rphy->list, &sas_host->rphy_list);
1578         if (identify->device_type == SAS_END_DEVICE &&
1579             (identify->target_port_protocols &
1580              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1581                 rphy->scsi_target_id = sas_host->next_target_id++;
1582         else if (identify->device_type == SAS_END_DEVICE)
1583                 rphy->scsi_target_id = -1;
1584         mutex_unlock(&sas_host->lock);
1585
1586         if (identify->device_type == SAS_END_DEVICE &&
1587             rphy->scsi_target_id != -1) {
1588                 int lun;
1589
1590                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1591                         lun = SCAN_WILD_CARD;
1592                 else
1593                         lun = 0;
1594
1595                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
1596         }
1597
1598         return 0;
1599 }
1600 EXPORT_SYMBOL(sas_rphy_add);
1601
1602 /**
1603  * sas_rphy_free  -  free a SAS remote PHY
1604  * @rphy: SAS remote PHY to free
1605  *
1606  * Frees the specified SAS remote PHY.
1607  *
1608  * Note:
1609  *   This function must only be called on a remote
1610  *   PHY that has not successfully been added using
1611  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1612  */
1613 void sas_rphy_free(struct sas_rphy *rphy)
1614 {
1615         struct device *dev = &rphy->dev;
1616         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1617         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1618
1619         mutex_lock(&sas_host->lock);
1620         list_del(&rphy->list);
1621         mutex_unlock(&sas_host->lock);
1622
1623         sas_bsg_remove(shost, rphy);
1624
1625         transport_destroy_device(dev);
1626
1627         put_device(dev);
1628 }
1629 EXPORT_SYMBOL(sas_rphy_free);
1630
1631 /**
1632  * sas_rphy_delete  -  remove and free SAS remote PHY
1633  * @rphy:       SAS remote PHY to remove and free
1634  *
1635  * Removes the specified SAS remote PHY and frees it.
1636  */
1637 void
1638 sas_rphy_delete(struct sas_rphy *rphy)
1639 {
1640         sas_rphy_remove(rphy);
1641         sas_rphy_free(rphy);
1642 }
1643 EXPORT_SYMBOL(sas_rphy_delete);
1644
1645 /**
1646  * sas_rphy_unlink  -  unlink SAS remote PHY
1647  * @rphy:       SAS remote phy to unlink from its parent port
1648  *
1649  * Removes port reference to an rphy
1650  */
1651 void sas_rphy_unlink(struct sas_rphy *rphy)
1652 {
1653         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1654
1655         parent->rphy = NULL;
1656 }
1657 EXPORT_SYMBOL(sas_rphy_unlink);
1658
1659 /**
1660  * sas_rphy_remove  -  remove SAS remote PHY
1661  * @rphy:       SAS remote phy to remove
1662  *
1663  * Removes the specified SAS remote PHY.
1664  */
1665 void
1666 sas_rphy_remove(struct sas_rphy *rphy)
1667 {
1668         struct device *dev = &rphy->dev;
1669
1670         switch (rphy->identify.device_type) {
1671         case SAS_END_DEVICE:
1672                 scsi_remove_target(dev);
1673                 break;
1674         case SAS_EDGE_EXPANDER_DEVICE:
1675         case SAS_FANOUT_EXPANDER_DEVICE:
1676                 sas_remove_children(dev);
1677                 break;
1678         default:
1679                 break;
1680         }
1681
1682         sas_rphy_unlink(rphy);
1683         transport_remove_device(dev);
1684         device_del(dev);
1685 }
1686 EXPORT_SYMBOL(sas_rphy_remove);
1687
1688 /**
1689  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1690  * @dev:        device to check
1691  *
1692  * Returns:
1693  *      %1 if the device represents a SAS remote PHY, %0 else
1694  */
1695 int scsi_is_sas_rphy(const struct device *dev)
1696 {
1697         return dev->release == sas_end_device_release ||
1698                 dev->release == sas_expander_release;
1699 }
1700 EXPORT_SYMBOL(scsi_is_sas_rphy);
1701
1702
1703 /*
1704  * SCSI scan helper
1705  */
1706
1707 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1708                 uint id, uint lun)
1709 {
1710         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1711         struct sas_rphy *rphy;
1712
1713         mutex_lock(&sas_host->lock);
1714         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1715                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1716                     rphy->scsi_target_id == -1)
1717                         continue;
1718
1719                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1720                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1721                         scsi_scan_target(&rphy->dev, 0,
1722                                          rphy->scsi_target_id, lun, 1);
1723                 }
1724         }
1725         mutex_unlock(&sas_host->lock);
1726
1727         return 0;
1728 }
1729
1730
1731 /*
1732  * Setup / Teardown code
1733  */
1734
1735 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1736         i->private_##attrb[count] = dev_attr_##field;           \
1737         i->private_##attrb[count].attr.mode = perm;                     \
1738         i->attrb[count] = &i->private_##attrb[count];                   \
1739         if (test)                                                       \
1740                 count++
1741
1742 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1743         i->private_##attrb[count] = dev_attr_##field;           \
1744         i->private_##attrb[count].attr.mode = perm;                     \
1745         if (ro_test) {                                                  \
1746                 i->private_##attrb[count].attr.mode = ro_perm;          \
1747                 i->private_##attrb[count].store = NULL;                 \
1748         }                                                               \
1749         i->attrb[count] = &i->private_##attrb[count];                   \
1750         if (test)                                                       \
1751                 count++
1752
1753 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1754         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1755
1756 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1757         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1758
1759 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1760         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1761
1762 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1763         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1764                         !i->f->set_phy_speed, S_IRUGO)
1765
1766 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1767         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1768                           !i->f->func, S_IRUGO)
1769
1770 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1771         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1772
1773 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1774         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1775
1776 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1777         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1778
1779 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1780         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1781
1782 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1783         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1784
1785 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1786         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1787
1788 /**
1789  * sas_attach_transport  -  instantiate SAS transport template
1790  * @ft:         SAS transport class function template
1791  */
1792 struct scsi_transport_template *
1793 sas_attach_transport(struct sas_function_template *ft)
1794 {
1795         struct sas_internal *i;
1796         int count;
1797
1798         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1799         if (!i)
1800                 return NULL;
1801
1802         i->t.user_scan = sas_user_scan;
1803
1804         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1805         i->t.host_attrs.ac.class = &sas_host_class.class;
1806         i->t.host_attrs.ac.match = sas_host_match;
1807         transport_container_register(&i->t.host_attrs);
1808         i->t.host_size = sizeof(struct sas_host_attrs);
1809
1810         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1811         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1812         i->phy_attr_cont.ac.match = sas_phy_match;
1813         transport_container_register(&i->phy_attr_cont);
1814
1815         i->port_attr_cont.ac.class = &sas_port_class.class;
1816         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1817         i->port_attr_cont.ac.match = sas_port_match;
1818         transport_container_register(&i->port_attr_cont);
1819
1820         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1821         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1822         i->rphy_attr_cont.ac.match = sas_rphy_match;
1823         transport_container_register(&i->rphy_attr_cont);
1824
1825         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1826         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1827         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1828         transport_container_register(&i->end_dev_attr_cont);
1829
1830         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1831         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1832         i->expander_attr_cont.ac.match = sas_expander_match;
1833         transport_container_register(&i->expander_attr_cont);
1834
1835         i->f = ft;
1836
1837         count = 0;
1838         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1839         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1840         SETUP_PHY_ATTRIBUTE(device_type);
1841         SETUP_PHY_ATTRIBUTE(sas_address);
1842         SETUP_PHY_ATTRIBUTE(phy_identifier);
1843         //SETUP_PHY_ATTRIBUTE(port_identifier);
1844         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1845         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1846         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1847         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1848         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1849
1850         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1851         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1852         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1853         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1854         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1855         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1856         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1857         i->phy_attrs[count] = NULL;
1858
1859         count = 0;
1860         SETUP_PORT_ATTRIBUTE(num_phys);
1861         i->port_attrs[count] = NULL;
1862
1863         count = 0;
1864         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1865         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1866         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1867         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1868         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1869         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1870                                        get_enclosure_identifier);
1871         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1872                                        get_bay_identifier);
1873         i->rphy_attrs[count] = NULL;
1874
1875         count = 0;
1876         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1877         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1878         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1879         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1880         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1881         i->end_dev_attrs[count] = NULL;
1882
1883         count = 0;
1884         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1885         SETUP_EXPANDER_ATTRIBUTE(product_id);
1886         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1887         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1888         SETUP_EXPANDER_ATTRIBUTE(component_id);
1889         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1890         SETUP_EXPANDER_ATTRIBUTE(level);
1891         i->expander_attrs[count] = NULL;
1892
1893         return &i->t;
1894 }
1895 EXPORT_SYMBOL(sas_attach_transport);
1896
1897 /**
1898  * sas_release_transport  -  release SAS transport template instance
1899  * @t:          transport template instance
1900  */
1901 void sas_release_transport(struct scsi_transport_template *t)
1902 {
1903         struct sas_internal *i = to_sas_internal(t);
1904
1905         transport_container_unregister(&i->t.host_attrs);
1906         transport_container_unregister(&i->phy_attr_cont);
1907         transport_container_unregister(&i->port_attr_cont);
1908         transport_container_unregister(&i->rphy_attr_cont);
1909         transport_container_unregister(&i->end_dev_attr_cont);
1910         transport_container_unregister(&i->expander_attr_cont);
1911
1912         kfree(i);
1913 }
1914 EXPORT_SYMBOL(sas_release_transport);
1915
1916 static __init int sas_transport_init(void)
1917 {
1918         int error;
1919
1920         error = transport_class_register(&sas_host_class);
1921         if (error)
1922                 goto out;
1923         error = transport_class_register(&sas_phy_class);
1924         if (error)
1925                 goto out_unregister_transport;
1926         error = transport_class_register(&sas_port_class);
1927         if (error)
1928                 goto out_unregister_phy;
1929         error = transport_class_register(&sas_rphy_class);
1930         if (error)
1931                 goto out_unregister_port;
1932         error = transport_class_register(&sas_end_dev_class);
1933         if (error)
1934                 goto out_unregister_rphy;
1935         error = transport_class_register(&sas_expander_class);
1936         if (error)
1937                 goto out_unregister_end_dev;
1938
1939         return 0;
1940
1941  out_unregister_end_dev:
1942         transport_class_unregister(&sas_end_dev_class);
1943  out_unregister_rphy:
1944         transport_class_unregister(&sas_rphy_class);
1945  out_unregister_port:
1946         transport_class_unregister(&sas_port_class);
1947  out_unregister_phy:
1948         transport_class_unregister(&sas_phy_class);
1949  out_unregister_transport:
1950         transport_class_unregister(&sas_host_class);
1951  out:
1952         return error;
1953
1954 }
1955
1956 static void __exit sas_transport_exit(void)
1957 {
1958         transport_class_unregister(&sas_host_class);
1959         transport_class_unregister(&sas_phy_class);
1960         transport_class_unregister(&sas_port_class);
1961         transport_class_unregister(&sas_rphy_class);
1962         transport_class_unregister(&sas_end_dev_class);
1963         transport_class_unregister(&sas_expander_class);
1964 }
1965
1966 MODULE_AUTHOR("Christoph Hellwig");
1967 MODULE_DESCRIPTION("SAS Transport Attributes");
1968 MODULE_LICENSE("GPL");
1969
1970 module_init(sas_transport_init);
1971 module_exit(sas_transport_exit);