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         { SAS_LINK_RATE_12_0_GBPS,      "12.0 Gbit" },
 155 };
 156 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 157 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 158
 159 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 160 {
 161         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 162         struct sas_end_device *rdev;
 163
 164         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 165
 166         rdev = rphy_to_end_device(rphy);
 167         return rdev;
 168 }
 169
 170 static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
 171                             struct sas_rphy *rphy)
 172 {
 173         struct request *req;
 174         int ret;
 175         int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 176
 177         while ((req = blk_fetch_request(q)) != NULL) {
 178                 spin_unlock_irq(q->queue_lock);
 179
 180                 handler = to_sas_internal(shost->transportt)->f->smp_handler;
 181                 ret = handler(shost, rphy, req);
 182                 req->errors = ret;
 183
 184                 blk_end_request_all(req, ret);
 185
 186                 spin_lock_irq(q->queue_lock);
 187         }
 188 }
 189
 190 static void sas_host_smp_request(struct request_queue *q)
 191 {
 192         sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
 193 }
 194
 195 static void sas_non_host_smp_request(struct request_queue *q)
 196 {
 197         struct sas_rphy *rphy = q->queuedata;
 198         sas_smp_request(q, rphy_to_shost(rphy), rphy);
 199 }
 200
 201 static void sas_host_release(struct device *dev)
 202 {
 203         struct Scsi_Host *shost = dev_to_shost(dev);
 204         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 205         struct request_queue *q = sas_host->q;
 206
 207         if (q)
 208                 blk_cleanup_queue(q);
 209 }
 210
 211 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 212 {
 213         struct request_queue *q;
 214         int error;
 215         struct device *dev;
 216         char namebuf[20];
 217         const char *name;
 218         void (*release)(struct device *);
 219
 220         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 221                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 222                 return 0;
 223         }
 224
 225         if (rphy) {
 226                 q = blk_init_queue(sas_non_host_smp_request, NULL);
 227                 dev = &rphy->dev;
 228                 name = dev_name(dev);
 229                 release = NULL;
 230         } else {
 231                 q = blk_init_queue(sas_host_smp_request, NULL);
 232                 dev = &shost->shost_gendev;
 233                 snprintf(namebuf, sizeof(namebuf),
 234                          "sas_host%d", shost->host_no);
 235                 name = namebuf;
 236                 release = sas_host_release;
 237         }
 238         if (!q)
 239                 return -ENOMEM;
 240
 241         error = bsg_register_queue(q, dev, name, release);
 242         if (error) {
 243                 blk_cleanup_queue(q);
 244                 return -ENOMEM;
 245         }
 246
 247         if (rphy)
 248                 rphy->q = q;
 249         else
 250                 to_sas_host_attrs(shost)->q = q;
 251
 252         if (rphy)
 253                 q->queuedata = rphy;
 254         else
 255                 q->queuedata = shost;
 256
 257         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
 258         return 0;
 259 }
 260
 261 static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
 262 {
 263         struct request_queue *q;
 264
 265         if (rphy)
 266                 q = rphy->q;
 267         else
 268                 q = to_sas_host_attrs(shost)->q;
 269
 270         if (!q)
 271                 return;
 272
 273         bsg_unregister_queue(q);
 274 }
 275
 276 /*
 277  * SAS host attributes
 278  */
 279
 280 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 281                           struct device *cdev)
 282 {
 283         struct Scsi_Host *shost = dev_to_shost(dev);
 284         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 285
 286         INIT_LIST_HEAD(&sas_host->rphy_list);
 287         mutex_init(&sas_host->lock);
 288         sas_host->next_target_id = 0;
 289         sas_host->next_expander_id = 0;
 290         sas_host->next_port_id = 0;
 291
 292         if (sas_bsg_initialize(shost, NULL))
 293                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 294                            shost->host_no);
 295
 296         return 0;
 297 }
 298
 299 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 300                            struct device *cdev)
 301 {
 302         struct Scsi_Host *shost = dev_to_shost(dev);
 303
 304         sas_bsg_remove(shost, NULL);
 305
 306         return 0;
 307 }
 308
 309 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 310                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 311
 312 static int sas_host_match(struct attribute_container *cont,
 313                             struct device *dev)
 314 {
 315         struct Scsi_Host *shost;
 316         struct sas_internal *i;
 317
 318         if (!scsi_is_host_device(dev))
 319                 return 0;
 320         shost = dev_to_shost(dev);
 321
 322         if (!shost->transportt)
 323                 return 0;
 324         if (shost->transportt->host_attrs.ac.class !=
 325                         &sas_host_class.class)
 326                 return 0;
 327
 328         i = to_sas_internal(shost->transportt);
 329         return &i->t.host_attrs.ac == cont;
 330 }
 331
 332 static int do_sas_phy_delete(struct device *dev, void *data)
 333 {
 334         int pass = (int)(unsigned long)data;
 335
 336         if (pass == 0 && scsi_is_sas_port(dev))
 337                 sas_port_delete(dev_to_sas_port(dev));
 338         else if (pass == 1 && scsi_is_sas_phy(dev))
 339                 sas_phy_delete(dev_to_phy(dev));
 340         return 0;
 341 }
 342
 343 /**
 344  * sas_remove_children  -  tear down a devices SAS data structures
 345  * @dev:        device belonging to the sas object
 346  *
 347  * Removes all SAS PHYs and remote PHYs for a given object
 348  */
 349 void sas_remove_children(struct device *dev)
 350 {
 351         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 352         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 353 }
 354 EXPORT_SYMBOL(sas_remove_children);
 355
 356 /**
 357  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 358  * @shost:      Scsi Host that is torn down
 359  *
 360  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
 361  * Must be called just before scsi_remove_host for SAS HBAs.
 362  */
 363 void sas_remove_host(struct Scsi_Host *shost)
 364 {
 365         sas_remove_children(&shost->shost_gendev);
 366 }
 367 EXPORT_SYMBOL(sas_remove_host);
 368
 369 /**
 370  * sas_tlr_supported - checking TLR bit in vpd 0x90
 371  * @sdev: scsi device struct
 372  *
 373  * Check Transport Layer Retries are supported or not.
 374  * If vpd page 0x90 is present, TRL is supported.
 375  *
 376  */
 377 unsigned int
 378 sas_tlr_supported(struct scsi_device *sdev)
 379 {
 380         const int vpd_len = 32;
 381         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 382         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 383         int ret = 0;
 384
 385         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 386                 goto out;
 387
 388         /*
 389          * Magic numbers: the VPD Protocol page (0x90)
 390          * has a 4 byte header and then one entry per device port
 391          * the TLR bit is at offset 8 on each port entry
 392          * if we take the first port, that's at total offset 12
 393          */
 394         ret = buffer[12] & 0x01;
 395
 396  out:
 397         kfree(buffer);
 398         rdev->tlr_supported = ret;
 399         return ret;
 400
 401 }
 402 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 403
 404 /**
 405  * sas_disable_tlr - setting TLR flags
 406  * @sdev: scsi device struct
 407  *
 408  * Seting tlr_enabled flag to 0.
 409  *
 410  */
 411 void
 412 sas_disable_tlr(struct scsi_device *sdev)
 413 {
 414         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 415
 416         rdev->tlr_enabled = 0;
 417 }
 418 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 419
 420 /**
 421  * sas_enable_tlr - setting TLR flags
 422  * @sdev: scsi device struct
 423  *
 424  * Seting tlr_enabled flag 1.
 425  *
 426  */
 427 void sas_enable_tlr(struct scsi_device *sdev)
 428 {
 429         unsigned int tlr_supported = 0;
 430         tlr_supported  = sas_tlr_supported(sdev);
 431
 432         if (tlr_supported) {
 433                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 434
 435                 rdev->tlr_enabled = 1;
 436         }
 437
 438         return;
 439 }
 440 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 441
 442 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 443 {
 444         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 445         return rdev->tlr_enabled;
 446 }
 447 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 448
 449 /*
 450  * SAS Phy attributes
 451  */
 452
 453 #define sas_phy_show_simple(field, name, format_string, cast)           \
 454 static ssize_t                                                          \
 455 show_sas_phy_##name(struct device *dev,                                 \
 456                     struct device_attribute *attr, char *buf)           \
 457 {                                                                       \
 458         struct sas_phy *phy = transport_class_to_phy(dev);              \
 459                                                                         \
 460         return snprintf(buf, 20, format_string, cast phy->field);       \
 461 }
 462
 463 #define sas_phy_simple_attr(field, name, format_string, type)           \
 464         sas_phy_show_simple(field, name, format_string, (type)) \
 465 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 466
 467 #define sas_phy_show_protocol(field, name)                              \
 468 static ssize_t                                                          \
 469 show_sas_phy_##name(struct device *dev,                                 \
 470                     struct device_attribute *attr, char *buf)           \
 471 {                                                                       \
 472         struct sas_phy *phy = transport_class_to_phy(dev);              \
 473                                                                         \
 474         if (!phy->field)                                                \
 475                 return snprintf(buf, 20, "none\n");                     \
 476         return get_sas_protocol_names(phy->field, buf);         \
 477 }
 478
 479 #define sas_phy_protocol_attr(field, name)                              \
 480         sas_phy_show_protocol(field, name)                              \
 481 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 482
 483 #define sas_phy_show_linkspeed(field)                                   \
 484 static ssize_t                                                          \
 485 show_sas_phy_##field(struct device *dev,                                \
 486                      struct device_attribute *attr, char *buf)          \
 487 {                                                                       \
 488         struct sas_phy *phy = transport_class_to_phy(dev);              \
 489                                                                         \
 490         return get_sas_linkspeed_names(phy->field, buf);                \
 491 }
 492
 493 /* Fudge to tell if we're minimum or maximum */
 494 #define sas_phy_store_linkspeed(field)                                  \
 495 static ssize_t                                                          \
 496 store_sas_phy_##field(struct device *dev,                               \
 497                       struct device_attribute *attr,                    \
 498                       const char *buf,  size_t count)                   \
 499 {                                                                       \
 500         struct sas_phy *phy = transport_class_to_phy(dev);              \
 501         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 502         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 503         u32 value;                                                      \
 504         struct sas_phy_linkrates rates = {0};                           \
 505         int error;                                                      \
 506                                                                         \
 507         error = set_sas_linkspeed_names(&value, buf);                   \
 508         if (error)                                                      \
 509                 return error;                                           \
 510         rates.field = value;                                            \
 511         error = i->f->set_phy_speed(phy, &rates);                       \
 512                                                                         \
 513         return error ? error : count;                                   \
 514 }
 515
 516 #define sas_phy_linkspeed_rw_attr(field)                                \
 517         sas_phy_show_linkspeed(field)                                   \
 518         sas_phy_store_linkspeed(field)                                  \
 519 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 520         store_sas_phy_##field)
 521
 522 #define sas_phy_linkspeed_attr(field)                                   \
 523         sas_phy_show_linkspeed(field)                                   \
 524 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 525
 526
 527 #define sas_phy_show_linkerror(field)                                   \
 528 static ssize_t                                                          \
 529 show_sas_phy_##field(struct device *dev,                                \
 530                      struct device_attribute *attr, char *buf)          \
 531 {                                                                       \
 532         struct sas_phy *phy = transport_class_to_phy(dev);              \
 533         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 534         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 535         int error;                                                      \
 536                                                                         \
 537         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 538         if (error)                                                      \
 539                 return error;                                           \
 540         return snprintf(buf, 20, "%u\n", phy->field);                   \
 541 }
 542
 543 #define sas_phy_linkerror_attr(field)                                   \
 544         sas_phy_show_linkerror(field)                                   \
 545 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 546
 547
 548 static ssize_t
 549 show_sas_device_type(struct device *dev,
 550                      struct device_attribute *attr, char *buf)
 551 {
 552         struct sas_phy *phy = transport_class_to_phy(dev);
 553
 554         if (!phy->identify.device_type)
 555                 return snprintf(buf, 20, "none\n");
 556         return get_sas_device_type_names(phy->identify.device_type, buf);
 557 }
 558 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 559
 560 static ssize_t do_sas_phy_enable(struct device *dev,
 561                 size_t count, int enable)
 562 {
 563         struct sas_phy *phy = transport_class_to_phy(dev);
 564         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 565         struct sas_internal *i = to_sas_internal(shost->transportt);
 566         int error;
 567
 568         error = i->f->phy_enable(phy, enable);
 569         if (error)
 570                 return error;
 571         phy->enabled = enable;
 572         return count;
 573 };
 574
 575 static ssize_t
 576 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 577                      const char *buf, size_t count)
 578 {
 579         if (count < 1)
 580                 return -EINVAL;
 581
 582         switch (buf[0]) {
 583         case '0':
 584                 do_sas_phy_enable(dev, count, 0);
 585                 break;
 586         case '1':
 587                 do_sas_phy_enable(dev, count, 1);
 588                 break;
 589         default:
 590                 return -EINVAL;
 591         }
 592
 593         return count;
 594 }
 595
 596 static ssize_t
 597 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 598                     char *buf)
 599 {
 600         struct sas_phy *phy = transport_class_to_phy(dev);
 601
 602         return snprintf(buf, 20, "%d", phy->enabled);
 603 }
 604
 605 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 606                          store_sas_phy_enable);
 607
 608 static ssize_t
 609 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 610 {
 611         struct sas_phy *phy = transport_class_to_phy(dev);
 612         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 613         struct sas_internal *i = to_sas_internal(shost->transportt);
 614         int error;
 615
 616         error = i->f->phy_reset(phy, hard_reset);
 617         if (error)
 618                 return error;
 619         phy->enabled = 1;
 620         return count;
 621 };
 622
 623 static ssize_t
 624 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 625                      const char *buf, size_t count)
 626 {
 627         return do_sas_phy_reset(dev, count, 0);
 628 }
 629 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 630
 631 static ssize_t
 632 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 633                      const char *buf, size_t count)
 634 {
 635         return do_sas_phy_reset(dev, count, 1);
 636 }
 637 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 638
 639 sas_phy_protocol_attr(identify.initiator_port_protocols,
 640                 initiator_port_protocols);
 641 sas_phy_protocol_attr(identify.target_port_protocols,
 642                 target_port_protocols);
 643 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 644                 unsigned long long);
 645 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 646 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 647 sas_phy_linkspeed_attr(negotiated_linkrate);
 648 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 649 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 650 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 651 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 652 sas_phy_linkerror_attr(invalid_dword_count);
 653 sas_phy_linkerror_attr(running_disparity_error_count);
 654 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 655 sas_phy_linkerror_attr(phy_reset_problem_count);
 656
 657 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 658                          struct device *cdev)
 659 {
 660         struct sas_phy *phy = dev_to_phy(dev);
 661         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 662         struct sas_internal *i = to_sas_internal(shost->transportt);
 663
 664         if (i->f->phy_setup)
 665                 i->f->phy_setup(phy);
 666
 667         return 0;
 668 }
 669
 670 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 671                 "sas_phy", sas_phy_setup, NULL, NULL);
 672
 673 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 674 {
 675         struct Scsi_Host *shost;
 676         struct sas_internal *i;
 677
 678         if (!scsi_is_sas_phy(dev))
 679                 return 0;
 680         shost = dev_to_shost(dev->parent);
 681
 682         if (!shost->transportt)
 683                 return 0;
 684         if (shost->transportt->host_attrs.ac.class !=
 685                         &sas_host_class.class)
 686                 return 0;
 687
 688         i = to_sas_internal(shost->transportt);
 689         return &i->phy_attr_cont.ac == cont;
 690 }
 691
 692 static void sas_phy_release(struct device *dev)
 693 {
 694         struct sas_phy *phy = dev_to_phy(dev);
 695         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 696         struct sas_internal *i = to_sas_internal(shost->transportt);
 697
 698         if (i->f->phy_release)
 699                 i->f->phy_release(phy);
 700         put_device(dev->parent);
 701         kfree(phy);
 702 }
 703
 704 /**
 705  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 706  * @parent:     Parent device
 707  * @number:     Phy index
 708  *
 709  * Allocates an SAS PHY structure.  It will be added in the device tree
 710  * below the device specified by @parent, which has to be either a Scsi_Host
 711  * or sas_rphy.
 712  *
 713  * Returns:
 714  *      SAS PHY allocated or %NULL if the allocation failed.
 715  */
 716 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 717 {
 718         struct Scsi_Host *shost = dev_to_shost(parent);
 719         struct sas_phy *phy;
 720
 721         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 722         if (!phy)
 723                 return NULL;
 724
 725         phy->number = number;
 726         phy->enabled = 1;
 727
 728         device_initialize(&phy->dev);
 729         phy->dev.parent = get_device(parent);
 730         phy->dev.release = sas_phy_release;
 731         INIT_LIST_HEAD(&phy->port_siblings);
 732         if (scsi_is_sas_expander_device(parent)) {
 733                 struct sas_rphy *rphy = dev_to_rphy(parent);
 734                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 735                         rphy->scsi_target_id, number);
 736         } else
 737                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 738
 739         transport_setup_device(&phy->dev);
 740
 741         return phy;
 742 }
 743 EXPORT_SYMBOL(sas_phy_alloc);
 744
 745 /**
 746  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 747  * @phy:        The PHY to be added
 748  *
 749  * Publishes a SAS PHY to the rest of the system.
 750  */
 751 int sas_phy_add(struct sas_phy *phy)
 752 {
 753         int error;
 754
 755         error = device_add(&phy->dev);
 756         if (!error) {
 757                 transport_add_device(&phy->dev);
 758                 transport_configure_device(&phy->dev);
 759         }
 760
 761         return error;
 762 }
 763 EXPORT_SYMBOL(sas_phy_add);
 764
 765 /**
 766  * sas_phy_free  -  free a SAS PHY
 767  * @phy:        SAS PHY to free
 768  *
 769  * Frees the specified SAS PHY.
 770  *
 771  * Note:
 772  *   This function must only be called on a PHY that has not
 773  *   successfully been added using sas_phy_add().
 774  */
 775 void sas_phy_free(struct sas_phy *phy)
 776 {
 777         transport_destroy_device(&phy->dev);
 778         put_device(&phy->dev);
 779 }
 780 EXPORT_SYMBOL(sas_phy_free);
 781
 782 /**
 783  * sas_phy_delete  -  remove SAS PHY
 784  * @phy:        SAS PHY to remove
 785  *
 786  * Removes the specified SAS PHY.  If the SAS PHY has an
 787  * associated remote PHY it is removed before.
 788  */
 789 void
 790 sas_phy_delete(struct sas_phy *phy)
 791 {
 792         struct device *dev = &phy->dev;
 793
 794         /* this happens if the phy is still part of a port when deleted */
 795         BUG_ON(!list_empty(&phy->port_siblings));
 796
 797         transport_remove_device(dev);
 798         device_del(dev);
 799         transport_destroy_device(dev);
 800         put_device(dev);
 801 }
 802 EXPORT_SYMBOL(sas_phy_delete);
 803
 804 /**
 805  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 806  * @dev:        device to check
 807  *
 808  * Returns:
 809  *      %1 if the device represents a SAS PHY, %0 else
 810  */
 811 int scsi_is_sas_phy(const struct device *dev)
 812 {
 813         return dev->release == sas_phy_release;
 814 }
 815 EXPORT_SYMBOL(scsi_is_sas_phy);
 816
 817 /*
 818  * SAS Port attributes
 819  */
 820 #define sas_port_show_simple(field, name, format_string, cast)          \
 821 static ssize_t                                                          \
 822 show_sas_port_##name(struct device *dev,                                \
 823                      struct device_attribute *attr, char *buf)          \
 824 {                                                                       \
 825         struct sas_port *port = transport_class_to_sas_port(dev);       \
 826                                                                         \
 827         return snprintf(buf, 20, format_string, cast port->field);      \
 828 }
 829
 830 #define sas_port_simple_attr(field, name, format_string, type)          \
 831         sas_port_show_simple(field, name, format_string, (type))        \
 832 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 833
 834 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 835
 836 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 837                                "sas_port", NULL, NULL, NULL);
 838
 839 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 840 {
 841         struct Scsi_Host *shost;
 842         struct sas_internal *i;
 843
 844         if (!scsi_is_sas_port(dev))
 845                 return 0;
 846         shost = dev_to_shost(dev->parent);
 847
 848         if (!shost->transportt)
 849                 return 0;
 850         if (shost->transportt->host_attrs.ac.class !=
 851                         &sas_host_class.class)
 852                 return 0;
 853
 854         i = to_sas_internal(shost->transportt);
 855         return &i->port_attr_cont.ac == cont;
 856 }
 857
 858
 859 static void sas_port_release(struct device *dev)
 860 {
 861         struct sas_port *port = dev_to_sas_port(dev);
 862
 863         BUG_ON(!list_empty(&port->phy_list));
 864
 865         put_device(dev->parent);
 866         kfree(port);
 867 }
 868
 869 static void sas_port_create_link(struct sas_port *port,
 870                                  struct sas_phy *phy)
 871 {
 872         int res;
 873
 874         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 875                                 dev_name(&phy->dev));
 876         if (res)
 877                 goto err;
 878         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 879         if (res)
 880                 goto err;
 881         return;
 882 err:
 883         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 884                __func__, res);
 885 }
 886
 887 static void sas_port_delete_link(struct sas_port *port,
 888                                  struct sas_phy *phy)
 889 {
 890         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 891         sysfs_remove_link(&phy->dev.kobj, "port");
 892 }
 893
 894 /** sas_port_alloc - allocate and initialize a SAS port structure
 895  *
 896  * @parent:     parent device
 897  * @port_id:    port number
 898  *
 899  * Allocates a SAS port structure.  It will be added to the device tree
 900  * below the device specified by @parent which must be either a Scsi_Host
 901  * or a sas_expander_device.
 902  *
 903  * Returns %NULL on error
 904  */
 905 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 906 {
 907         struct Scsi_Host *shost = dev_to_shost(parent);
 908         struct sas_port *port;
 909
 910         port = kzalloc(sizeof(*port), GFP_KERNEL);
 911         if (!port)
 912                 return NULL;
 913
 914         port->port_identifier = port_id;
 915
 916         device_initialize(&port->dev);
 917
 918         port->dev.parent = get_device(parent);
 919         port->dev.release = sas_port_release;
 920
 921         mutex_init(&port->phy_list_mutex);
 922         INIT_LIST_HEAD(&port->phy_list);
 923
 924         if (scsi_is_sas_expander_device(parent)) {
 925                 struct sas_rphy *rphy = dev_to_rphy(parent);
 926                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 927                              rphy->scsi_target_id, port->port_identifier);
 928         } else
 929                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 930                              port->port_identifier);
 931
 932         transport_setup_device(&port->dev);
 933
 934         return port;
 935 }
 936 EXPORT_SYMBOL(sas_port_alloc);
 937
 938 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 939  *
 940  * @parent:     parent device
 941  *
 942  * Allocates a SAS port structure and a number to go with it.  This
 943  * interface is really for adapters where the port number has no
 944  * meansing, so the sas class should manage them.  It will be added to
 945  * the device tree below the device specified by @parent which must be
 946  * either a Scsi_Host or a sas_expander_device.
 947  *
 948  * Returns %NULL on error
 949  */
 950 struct sas_port *sas_port_alloc_num(struct device *parent)
 951 {
 952         int index;
 953         struct Scsi_Host *shost = dev_to_shost(parent);
 954         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 955
 956         /* FIXME: use idr for this eventually */
 957         mutex_lock(&sas_host->lock);
 958         if (scsi_is_sas_expander_device(parent)) {
 959                 struct sas_rphy *rphy = dev_to_rphy(parent);
 960                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 961
 962                 index = exp->next_port_id++;
 963         } else
 964                 index = sas_host->next_port_id++;
 965         mutex_unlock(&sas_host->lock);
 966         return sas_port_alloc(parent, index);
 967 }
 968 EXPORT_SYMBOL(sas_port_alloc_num);
 969
 970 /**
 971  * sas_port_add - add a SAS port to the device hierarchy
 972  * @port:       port to be added
 973  *
 974  * publishes a port to the rest of the system
 975  */
 976 int sas_port_add(struct sas_port *port)
 977 {
 978         int error;
 979
 980         /* No phys should be added until this is made visible */
 981         BUG_ON(!list_empty(&port->phy_list));
 982
 983         error = device_add(&port->dev);
 984
 985         if (error)
 986                 return error;
 987
 988         transport_add_device(&port->dev);
 989         transport_configure_device(&port->dev);
 990
 991         return 0;
 992 }
 993 EXPORT_SYMBOL(sas_port_add);
 994
 995 /**
 996  * sas_port_free  -  free a SAS PORT
 997  * @port:       SAS PORT to free
 998  *
 999  * Frees the specified SAS PORT.
1000  *
1001  * Note:
1002  *   This function must only be called on a PORT that has not
1003  *   successfully been added using sas_port_add().
1004  */
1005 void sas_port_free(struct sas_port *port)
1006 {
1007         transport_destroy_device(&port->dev);
1008         put_device(&port->dev);
1009 }
1010 EXPORT_SYMBOL(sas_port_free);
1011
1012 /**
1013  * sas_port_delete  -  remove SAS PORT
1014  * @port:       SAS PORT to remove
1015  *
1016  * Removes the specified SAS PORT.  If the SAS PORT has an
1017  * associated phys, unlink them from the port as well.
1018  */
1019 void sas_port_delete(struct sas_port *port)
1020 {
1021         struct device *dev = &port->dev;
1022         struct sas_phy *phy, *tmp_phy;
1023
1024         if (port->rphy) {
1025                 sas_rphy_delete(port->rphy);
1026                 port->rphy = NULL;
1027         }
1028
1029         mutex_lock(&port->phy_list_mutex);
1030         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1031                                  port_siblings) {
1032                 sas_port_delete_link(port, phy);
1033                 list_del_init(&phy->port_siblings);
1034         }
1035         mutex_unlock(&port->phy_list_mutex);
1036
1037         if (port->is_backlink) {
1038                 struct device *parent = port->dev.parent;
1039
1040                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1041                 port->is_backlink = 0;
1042         }
1043
1044         transport_remove_device(dev);
1045         device_del(dev);
1046         transport_destroy_device(dev);
1047         put_device(dev);
1048 }
1049 EXPORT_SYMBOL(sas_port_delete);
1050
1051 /**
1052  * scsi_is_sas_port -  check if a struct device represents a SAS port
1053  * @dev:        device to check
1054  *
1055  * Returns:
1056  *      %1 if the device represents a SAS Port, %0 else
1057  */
1058 int scsi_is_sas_port(const struct device *dev)
1059 {
1060         return dev->release == sas_port_release;
1061 }
1062 EXPORT_SYMBOL(scsi_is_sas_port);
1063
1064 /**
1065  * sas_port_get_phy - try to take a reference on a port member
1066  * @port: port to check
1067  */
1068 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1069 {
1070         struct sas_phy *phy;
1071
1072         mutex_lock(&port->phy_list_mutex);
1073         if (list_empty(&port->phy_list))
1074                 phy = NULL;
1075         else {
1076                 struct list_head *ent = port->phy_list.next;
1077
1078                 phy = list_entry(ent, typeof(*phy), port_siblings);
1079                 get_device(&phy->dev);
1080         }
1081         mutex_unlock(&port->phy_list_mutex);
1082
1083         return phy;
1084 }
1085 EXPORT_SYMBOL(sas_port_get_phy);
1086
1087 /**
1088  * sas_port_add_phy - add another phy to a port to form a wide port
1089  * @port:       port to add the phy to
1090  * @phy:        phy to add
1091  *
1092  * When a port is initially created, it is empty (has no phys).  All
1093  * ports must have at least one phy to operated, and all wide ports
1094  * must have at least two.  The current code makes no difference
1095  * between ports and wide ports, but the only object that can be
1096  * connected to a remote device is a port, so ports must be formed on
1097  * all devices with phys if they're connected to anything.
1098  */
1099 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1100 {
1101         mutex_lock(&port->phy_list_mutex);
1102         if (unlikely(!list_empty(&phy->port_siblings))) {
1103                 /* make sure we're already on this port */
1104                 struct sas_phy *tmp;
1105
1106                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1107                         if (tmp == phy)
1108                                 break;
1109                 /* If this trips, you added a phy that was already
1110                  * part of a different port */
1111                 if (unlikely(tmp != phy)) {
1112                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1113                                    dev_name(&phy->dev));
1114                         BUG();
1115                 }
1116         } else {
1117                 sas_port_create_link(port, phy);
1118                 list_add_tail(&phy->port_siblings, &port->phy_list);
1119                 port->num_phys++;
1120         }
1121         mutex_unlock(&port->phy_list_mutex);
1122 }
1123 EXPORT_SYMBOL(sas_port_add_phy);
1124
1125 /**
1126  * sas_port_delete_phy - remove a phy from a port or wide port
1127  * @port:       port to remove the phy from
1128  * @phy:        phy to remove
1129  *
1130  * This operation is used for tearing down ports again.  It must be
1131  * done to every port or wide port before calling sas_port_delete.
1132  */
1133 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1134 {
1135         mutex_lock(&port->phy_list_mutex);
1136         sas_port_delete_link(port, phy);
1137         list_del_init(&phy->port_siblings);
1138         port->num_phys--;
1139         mutex_unlock(&port->phy_list_mutex);
1140 }
1141 EXPORT_SYMBOL(sas_port_delete_phy);
1142
1143 void sas_port_mark_backlink(struct sas_port *port)
1144 {
1145         int res;
1146         struct device *parent = port->dev.parent->parent->parent;
1147
1148         if (port->is_backlink)
1149                 return;
1150         port->is_backlink = 1;
1151         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1152                                 dev_name(parent));
1153         if (res)
1154                 goto err;
1155         return;
1156 err:
1157         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1158                __func__, res);
1159
1160 }
1161 EXPORT_SYMBOL(sas_port_mark_backlink);
1162
1163 /*
1164  * SAS remote PHY attributes.
1165  */
1166
1167 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1168 static ssize_t                                                          \
1169 show_sas_rphy_##name(struct device *dev,                                \
1170                      struct device_attribute *attr, char *buf)          \
1171 {                                                                       \
1172         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1173                                                                         \
1174         return snprintf(buf, 20, format_string, cast rphy->field);      \
1175 }
1176
1177 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1178         sas_rphy_show_simple(field, name, format_string, (type))        \
1179 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1180                 show_sas_rphy_##name, NULL)
1181
1182 #define sas_rphy_show_protocol(field, name)                             \
1183 static ssize_t                                                          \
1184 show_sas_rphy_##name(struct device *dev,                                \
1185                      struct device_attribute *attr, char *buf)          \
1186 {                                                                       \
1187         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1188                                                                         \
1189         if (!rphy->field)                                       \
1190                 return snprintf(buf, 20, "none\n");                     \
1191         return get_sas_protocol_names(rphy->field, buf);        \
1192 }
1193
1194 #define sas_rphy_protocol_attr(field, name)                             \
1195         sas_rphy_show_protocol(field, name)                             \
1196 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1197                 show_sas_rphy_##name, NULL)
1198
1199 static ssize_t
1200 show_sas_rphy_device_type(struct device *dev,
1201                           struct device_attribute *attr, char *buf)
1202 {
1203         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1204
1205         if (!rphy->identify.device_type)
1206                 return snprintf(buf, 20, "none\n");
1207         return get_sas_device_type_names(
1208                         rphy->identify.device_type, buf);
1209 }
1210
1211 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1212                 show_sas_rphy_device_type, NULL);
1213
1214 static ssize_t
1215 show_sas_rphy_enclosure_identifier(struct device *dev,
1216                                    struct device_attribute *attr, char *buf)
1217 {
1218         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1219         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1220         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1221         struct sas_internal *i = to_sas_internal(shost->transportt);
1222         u64 identifier;
1223         int error;
1224
1225         /*
1226          * Only devices behind an expander are supported, because the
1227          * enclosure identifier is a SMP feature.
1228          */
1229         if (scsi_is_sas_phy_local(phy))
1230                 return -EINVAL;
1231
1232         error = i->f->get_enclosure_identifier(rphy, &identifier);
1233         if (error)
1234                 return error;
1235         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1236 }
1237
1238 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1239                 show_sas_rphy_enclosure_identifier, NULL);
1240
1241 static ssize_t
1242 show_sas_rphy_bay_identifier(struct device *dev,
1243                              struct device_attribute *attr, char *buf)
1244 {
1245         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1246         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1247         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1248         struct sas_internal *i = to_sas_internal(shost->transportt);
1249         int val;
1250
1251         if (scsi_is_sas_phy_local(phy))
1252                 return -EINVAL;
1253
1254         val = i->f->get_bay_identifier(rphy);
1255         if (val < 0)
1256                 return val;
1257         return sprintf(buf, "%d\n", val);
1258 }
1259
1260 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1261                 show_sas_rphy_bay_identifier, NULL);
1262
1263 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1264                 initiator_port_protocols);
1265 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1266 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1267                 unsigned long long);
1268 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1269
1270 /* only need 8 bytes of data plus header (4 or 8) */
1271 #define BUF_SIZE 64
1272
1273 int sas_read_port_mode_page(struct scsi_device *sdev)
1274 {
1275         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1276         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1277         struct scsi_mode_data mode_data;
1278         int res, error;
1279
1280         if (!buffer)
1281                 return -ENOMEM;
1282
1283         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1284                               &mode_data, NULL);
1285
1286         error = -EINVAL;
1287         if (!scsi_status_is_good(res))
1288                 goto out;
1289
1290         msdata = buffer +  mode_data.header_length +
1291                 mode_data.block_descriptor_length;
1292
1293         if (msdata - buffer > BUF_SIZE - 8)
1294                 goto out;
1295
1296         error = 0;
1297
1298         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1299         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1300         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1301
1302  out:
1303         kfree(buffer);
1304         return error;
1305 }
1306 EXPORT_SYMBOL(sas_read_port_mode_page);
1307
1308 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1309                                "sas_end_device", NULL, NULL, NULL);
1310
1311 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1312 static ssize_t                                                          \
1313 show_sas_end_dev_##name(struct device *dev,                             \
1314                         struct device_attribute *attr, char *buf)       \
1315 {                                                                       \
1316         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1317         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1318                                                                         \
1319         return snprintf(buf, 20, format_string, cast rdev->field);      \
1320 }
1321
1322 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1323         sas_end_dev_show_simple(field, name, format_string, (type))     \
1324 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1325                 show_sas_end_dev_##name, NULL)
1326
1327 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1328 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1329                         "%d\n", int);
1330 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1331                         "%d\n", int);
1332 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1333                         "%d\n", int);
1334 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1335                         "%d\n", int);
1336
1337 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1338                                "sas_expander", NULL, NULL, NULL);
1339
1340 #define sas_expander_show_simple(field, name, format_string, cast)      \
1341 static ssize_t                                                          \
1342 show_sas_expander_##name(struct device *dev,                            \
1343                          struct device_attribute *attr, char *buf)      \
1344 {                                                                       \
1345         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1346         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1347                                                                         \
1348         return snprintf(buf, 20, format_string, cast edev->field);      \
1349 }
1350
1351 #define sas_expander_simple_attr(field, name, format_string, type)      \
1352         sas_expander_show_simple(field, name, format_string, (type))    \
1353 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1354                 show_sas_expander_##name, NULL)
1355
1356 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1357 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1358 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1359 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1360                          "%s\n", char *);
1361 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1362 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1363                          unsigned int);
1364 sas_expander_simple_attr(level, level, "%d\n", int);
1365
1366 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1367                 "sas_device", NULL, NULL, NULL);
1368
1369 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1370 {
1371         struct Scsi_Host *shost;
1372         struct sas_internal *i;
1373
1374         if (!scsi_is_sas_rphy(dev))
1375                 return 0;
1376         shost = dev_to_shost(dev->parent->parent);
1377
1378         if (!shost->transportt)
1379                 return 0;
1380         if (shost->transportt->host_attrs.ac.class !=
1381                         &sas_host_class.class)
1382                 return 0;
1383
1384         i = to_sas_internal(shost->transportt);
1385         return &i->rphy_attr_cont.ac == cont;
1386 }
1387
1388 static int sas_end_dev_match(struct attribute_container *cont,
1389                              struct device *dev)
1390 {
1391         struct Scsi_Host *shost;
1392         struct sas_internal *i;
1393         struct sas_rphy *rphy;
1394
1395         if (!scsi_is_sas_rphy(dev))
1396                 return 0;
1397         shost = dev_to_shost(dev->parent->parent);
1398         rphy = dev_to_rphy(dev);
1399
1400         if (!shost->transportt)
1401                 return 0;
1402         if (shost->transportt->host_attrs.ac.class !=
1403                         &sas_host_class.class)
1404                 return 0;
1405
1406         i = to_sas_internal(shost->transportt);
1407         return &i->end_dev_attr_cont.ac == cont &&
1408                 rphy->identify.device_type == SAS_END_DEVICE;
1409 }
1410
1411 static int sas_expander_match(struct attribute_container *cont,
1412                               struct device *dev)
1413 {
1414         struct Scsi_Host *shost;
1415         struct sas_internal *i;
1416         struct sas_rphy *rphy;
1417
1418         if (!scsi_is_sas_rphy(dev))
1419                 return 0;
1420         shost = dev_to_shost(dev->parent->parent);
1421         rphy = dev_to_rphy(dev);
1422
1423         if (!shost->transportt)
1424                 return 0;
1425         if (shost->transportt->host_attrs.ac.class !=
1426                         &sas_host_class.class)
1427                 return 0;
1428
1429         i = to_sas_internal(shost->transportt);
1430         return &i->expander_attr_cont.ac == cont &&
1431                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1432                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1433 }
1434
1435 static void sas_expander_release(struct device *dev)
1436 {
1437         struct sas_rphy *rphy = dev_to_rphy(dev);
1438         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1439
1440         if (rphy->q)
1441                 blk_cleanup_queue(rphy->q);
1442
1443         put_device(dev->parent);
1444         kfree(edev);
1445 }
1446
1447 static void sas_end_device_release(struct device *dev)
1448 {
1449         struct sas_rphy *rphy = dev_to_rphy(dev);
1450         struct sas_end_device *edev = rphy_to_end_device(rphy);
1451
1452         if (rphy->q)
1453                 blk_cleanup_queue(rphy->q);
1454
1455         put_device(dev->parent);
1456         kfree(edev);
1457 }
1458
1459 /**
1460  * sas_rphy_initialize - common rphy intialization
1461  * @rphy:       rphy to initialise
1462  *
1463  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1464  * initialise the common rphy component of each.
1465  */
1466 static void sas_rphy_initialize(struct sas_rphy *rphy)
1467 {
1468         INIT_LIST_HEAD(&rphy->list);
1469 }
1470
1471 /**
1472  * sas_end_device_alloc - allocate an rphy for an end device
1473  * @parent: which port
1474  *
1475  * Allocates an SAS remote PHY structure, connected to @parent.
1476  *
1477  * Returns:
1478  *      SAS PHY allocated or %NULL if the allocation failed.
1479  */
1480 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1481 {
1482         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1483         struct sas_end_device *rdev;
1484
1485         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1486         if (!rdev) {
1487                 return NULL;
1488         }
1489
1490         device_initialize(&rdev->rphy.dev);
1491         rdev->rphy.dev.parent = get_device(&parent->dev);
1492         rdev->rphy.dev.release = sas_end_device_release;
1493         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1494                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1495                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1496                              shost->host_no, rphy->scsi_target_id,
1497                              parent->port_identifier);
1498         } else
1499                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1500                              shost->host_no, parent->port_identifier);
1501         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1502         sas_rphy_initialize(&rdev->rphy);
1503         transport_setup_device(&rdev->rphy.dev);
1504
1505         return &rdev->rphy;
1506 }
1507 EXPORT_SYMBOL(sas_end_device_alloc);
1508
1509 /**
1510  * sas_expander_alloc - allocate an rphy for an end device
1511  * @parent: which port
1512  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1513  *
1514  * Allocates an SAS remote PHY structure, connected to @parent.
1515  *
1516  * Returns:
1517  *      SAS PHY allocated or %NULL if the allocation failed.
1518  */
1519 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1520                                     enum sas_device_type type)
1521 {
1522         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1523         struct sas_expander_device *rdev;
1524         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1525
1526         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1527                type != SAS_FANOUT_EXPANDER_DEVICE);
1528
1529         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1530         if (!rdev) {
1531                 return NULL;
1532         }
1533
1534         device_initialize(&rdev->rphy.dev);
1535         rdev->rphy.dev.parent = get_device(&parent->dev);
1536         rdev->rphy.dev.release = sas_expander_release;
1537         mutex_lock(&sas_host->lock);
1538         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1539         mutex_unlock(&sas_host->lock);
1540         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1541                      shost->host_no, rdev->rphy.scsi_target_id);
1542         rdev->rphy.identify.device_type = type;
1543         sas_rphy_initialize(&rdev->rphy);
1544         transport_setup_device(&rdev->rphy.dev);
1545
1546         return &rdev->rphy;
1547 }
1548 EXPORT_SYMBOL(sas_expander_alloc);
1549
1550 /**
1551  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1552  * @rphy:       The remote PHY to be added
1553  *
1554  * Publishes a SAS remote PHY to the rest of the system.
1555  */
1556 int sas_rphy_add(struct sas_rphy *rphy)
1557 {
1558         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1559         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1560         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1561         struct sas_identify *identify = &rphy->identify;
1562         int error;
1563
1564         if (parent->rphy)
1565                 return -ENXIO;
1566         parent->rphy = rphy;
1567
1568         error = device_add(&rphy->dev);
1569         if (error)
1570                 return error;
1571         transport_add_device(&rphy->dev);
1572         transport_configure_device(&rphy->dev);
1573         if (sas_bsg_initialize(shost, rphy))
1574                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1575
1576
1577         mutex_lock(&sas_host->lock);
1578         list_add_tail(&rphy->list, &sas_host->rphy_list);
1579         if (identify->device_type == SAS_END_DEVICE &&
1580             (identify->target_port_protocols &
1581              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1582                 rphy->scsi_target_id = sas_host->next_target_id++;
1583         else if (identify->device_type == SAS_END_DEVICE)
1584                 rphy->scsi_target_id = -1;
1585         mutex_unlock(&sas_host->lock);
1586
1587         if (identify->device_type == SAS_END_DEVICE &&
1588             rphy->scsi_target_id != -1) {
1589                 int lun;
1590
1591                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1592                         lun = SCAN_WILD_CARD;
1593                 else
1594                         lun = 0;
1595
1596                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
1597         }
1598
1599         return 0;
1600 }
1601 EXPORT_SYMBOL(sas_rphy_add);
1602
1603 /**
1604  * sas_rphy_free  -  free a SAS remote PHY
1605  * @rphy: SAS remote PHY to free
1606  *
1607  * Frees the specified SAS remote PHY.
1608  *
1609  * Note:
1610  *   This function must only be called on a remote
1611  *   PHY that has not successfully been added using
1612  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1613  */
1614 void sas_rphy_free(struct sas_rphy *rphy)
1615 {
1616         struct device *dev = &rphy->dev;
1617         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1618         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1619
1620         mutex_lock(&sas_host->lock);
1621         list_del(&rphy->list);
1622         mutex_unlock(&sas_host->lock);
1623
1624         transport_destroy_device(dev);
1625
1626         put_device(dev);
1627 }
1628 EXPORT_SYMBOL(sas_rphy_free);
1629
1630 /**
1631  * sas_rphy_delete  -  remove and free SAS remote PHY
1632  * @rphy:       SAS remote PHY to remove and free
1633  *
1634  * Removes the specified SAS remote PHY and frees it.
1635  */
1636 void
1637 sas_rphy_delete(struct sas_rphy *rphy)
1638 {
1639         sas_rphy_remove(rphy);
1640         sas_rphy_free(rphy);
1641 }
1642 EXPORT_SYMBOL(sas_rphy_delete);
1643
1644 /**
1645  * sas_rphy_unlink  -  unlink SAS remote PHY
1646  * @rphy:       SAS remote phy to unlink from its parent port
1647  *
1648  * Removes port reference to an rphy
1649  */
1650 void sas_rphy_unlink(struct sas_rphy *rphy)
1651 {
1652         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1653
1654         parent->rphy = NULL;
1655 }
1656 EXPORT_SYMBOL(sas_rphy_unlink);
1657
1658 /**
1659  * sas_rphy_remove  -  remove SAS remote PHY
1660  * @rphy:       SAS remote phy to remove
1661  *
1662  * Removes the specified SAS remote PHY.
1663  */
1664 void
1665 sas_rphy_remove(struct sas_rphy *rphy)
1666 {
1667         struct device *dev = &rphy->dev;
1668
1669         switch (rphy->identify.device_type) {
1670         case SAS_END_DEVICE:
1671                 scsi_remove_target(dev);
1672                 break;
1673         case SAS_EDGE_EXPANDER_DEVICE:
1674         case SAS_FANOUT_EXPANDER_DEVICE:
1675                 sas_remove_children(dev);
1676                 break;
1677         default:
1678                 break;
1679         }
1680
1681         sas_rphy_unlink(rphy);
1682         sas_bsg_remove(NULL, 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, u64 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);