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         error = i->f->get_enclosure_identifier(rphy, &identifier);
1226         if (error)
1227                 return error;
1228         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1229 }
1230
1231 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1232                 show_sas_rphy_enclosure_identifier, NULL);
1233
1234 static ssize_t
1235 show_sas_rphy_bay_identifier(struct device *dev,
1236                              struct device_attribute *attr, char *buf)
1237 {
1238         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1239         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1240         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1241         struct sas_internal *i = to_sas_internal(shost->transportt);
1242         int val;
1243
1244         val = i->f->get_bay_identifier(rphy);
1245         if (val < 0)
1246                 return val;
1247         return sprintf(buf, "%d\n", val);
1248 }
1249
1250 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1251                 show_sas_rphy_bay_identifier, NULL);
1252
1253 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1254                 initiator_port_protocols);
1255 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1256 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1257                 unsigned long long);
1258 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1259
1260 /* only need 8 bytes of data plus header (4 or 8) */
1261 #define BUF_SIZE 64
1262
1263 int sas_read_port_mode_page(struct scsi_device *sdev)
1264 {
1265         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1266         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1267         struct scsi_mode_data mode_data;
1268         int res, error;
1269
1270         if (!buffer)
1271                 return -ENOMEM;
1272
1273         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1274                               &mode_data, NULL);
1275
1276         error = -EINVAL;
1277         if (!scsi_status_is_good(res))
1278                 goto out;
1279
1280         msdata = buffer +  mode_data.header_length +
1281                 mode_data.block_descriptor_length;
1282
1283         if (msdata - buffer > BUF_SIZE - 8)
1284                 goto out;
1285
1286         error = 0;
1287
1288         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1289         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1290         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1291
1292  out:
1293         kfree(buffer);
1294         return error;
1295 }
1296 EXPORT_SYMBOL(sas_read_port_mode_page);
1297
1298 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1299                                "sas_end_device", NULL, NULL, NULL);
1300
1301 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1302 static ssize_t                                                          \
1303 show_sas_end_dev_##name(struct device *dev,                             \
1304                         struct device_attribute *attr, char *buf)       \
1305 {                                                                       \
1306         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1307         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1308                                                                         \
1309         return snprintf(buf, 20, format_string, cast rdev->field);      \
1310 }
1311
1312 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1313         sas_end_dev_show_simple(field, name, format_string, (type))     \
1314 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1315                 show_sas_end_dev_##name, NULL)
1316
1317 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1318 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1319                         "%d\n", int);
1320 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1321                         "%d\n", int);
1322 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1323                         "%d\n", int);
1324 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1325                         "%d\n", int);
1326
1327 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1328                                "sas_expander", NULL, NULL, NULL);
1329
1330 #define sas_expander_show_simple(field, name, format_string, cast)      \
1331 static ssize_t                                                          \
1332 show_sas_expander_##name(struct device *dev,                            \
1333                          struct device_attribute *attr, char *buf)      \
1334 {                                                                       \
1335         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1336         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1337                                                                         \
1338         return snprintf(buf, 20, format_string, cast edev->field);      \
1339 }
1340
1341 #define sas_expander_simple_attr(field, name, format_string, type)      \
1342         sas_expander_show_simple(field, name, format_string, (type))    \
1343 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1344                 show_sas_expander_##name, NULL)
1345
1346 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1347 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1348 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1349 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1350                          "%s\n", char *);
1351 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1352 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1353                          unsigned int);
1354 sas_expander_simple_attr(level, level, "%d\n", int);
1355
1356 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1357                 "sas_device", NULL, NULL, NULL);
1358
1359 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1360 {
1361         struct Scsi_Host *shost;
1362         struct sas_internal *i;
1363
1364         if (!scsi_is_sas_rphy(dev))
1365                 return 0;
1366         shost = dev_to_shost(dev->parent->parent);
1367
1368         if (!shost->transportt)
1369                 return 0;
1370         if (shost->transportt->host_attrs.ac.class !=
1371                         &sas_host_class.class)
1372                 return 0;
1373
1374         i = to_sas_internal(shost->transportt);
1375         return &i->rphy_attr_cont.ac == cont;
1376 }
1377
1378 static int sas_end_dev_match(struct attribute_container *cont,
1379                              struct device *dev)
1380 {
1381         struct Scsi_Host *shost;
1382         struct sas_internal *i;
1383         struct sas_rphy *rphy;
1384
1385         if (!scsi_is_sas_rphy(dev))
1386                 return 0;
1387         shost = dev_to_shost(dev->parent->parent);
1388         rphy = dev_to_rphy(dev);
1389
1390         if (!shost->transportt)
1391                 return 0;
1392         if (shost->transportt->host_attrs.ac.class !=
1393                         &sas_host_class.class)
1394                 return 0;
1395
1396         i = to_sas_internal(shost->transportt);
1397         return &i->end_dev_attr_cont.ac == cont &&
1398                 rphy->identify.device_type == SAS_END_DEVICE;
1399 }
1400
1401 static int sas_expander_match(struct attribute_container *cont,
1402                               struct device *dev)
1403 {
1404         struct Scsi_Host *shost;
1405         struct sas_internal *i;
1406         struct sas_rphy *rphy;
1407
1408         if (!scsi_is_sas_rphy(dev))
1409                 return 0;
1410         shost = dev_to_shost(dev->parent->parent);
1411         rphy = dev_to_rphy(dev);
1412
1413         if (!shost->transportt)
1414                 return 0;
1415         if (shost->transportt->host_attrs.ac.class !=
1416                         &sas_host_class.class)
1417                 return 0;
1418
1419         i = to_sas_internal(shost->transportt);
1420         return &i->expander_attr_cont.ac == cont &&
1421                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1422                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1423 }
1424
1425 static void sas_expander_release(struct device *dev)
1426 {
1427         struct sas_rphy *rphy = dev_to_rphy(dev);
1428         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1429
1430         if (rphy->q)
1431                 blk_cleanup_queue(rphy->q);
1432
1433         put_device(dev->parent);
1434         kfree(edev);
1435 }
1436
1437 static void sas_end_device_release(struct device *dev)
1438 {
1439         struct sas_rphy *rphy = dev_to_rphy(dev);
1440         struct sas_end_device *edev = rphy_to_end_device(rphy);
1441
1442         if (rphy->q)
1443                 blk_cleanup_queue(rphy->q);
1444
1445         put_device(dev->parent);
1446         kfree(edev);
1447 }
1448
1449 /**
1450  * sas_rphy_initialize - common rphy intialization
1451  * @rphy:       rphy to initialise
1452  *
1453  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1454  * initialise the common rphy component of each.
1455  */
1456 static void sas_rphy_initialize(struct sas_rphy *rphy)
1457 {
1458         INIT_LIST_HEAD(&rphy->list);
1459 }
1460
1461 /**
1462  * sas_end_device_alloc - allocate an rphy for an end device
1463  * @parent: which port
1464  *
1465  * Allocates an SAS remote PHY structure, connected to @parent.
1466  *
1467  * Returns:
1468  *      SAS PHY allocated or %NULL if the allocation failed.
1469  */
1470 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1471 {
1472         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1473         struct sas_end_device *rdev;
1474
1475         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1476         if (!rdev) {
1477                 return NULL;
1478         }
1479
1480         device_initialize(&rdev->rphy.dev);
1481         rdev->rphy.dev.parent = get_device(&parent->dev);
1482         rdev->rphy.dev.release = sas_end_device_release;
1483         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1484                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1485                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1486                              shost->host_no, rphy->scsi_target_id,
1487                              parent->port_identifier);
1488         } else
1489                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1490                              shost->host_no, parent->port_identifier);
1491         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1492         sas_rphy_initialize(&rdev->rphy);
1493         transport_setup_device(&rdev->rphy.dev);
1494
1495         return &rdev->rphy;
1496 }
1497 EXPORT_SYMBOL(sas_end_device_alloc);
1498
1499 /**
1500  * sas_expander_alloc - allocate an rphy for an end device
1501  * @parent: which port
1502  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1503  *
1504  * Allocates an SAS remote PHY structure, connected to @parent.
1505  *
1506  * Returns:
1507  *      SAS PHY allocated or %NULL if the allocation failed.
1508  */
1509 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1510                                     enum sas_device_type type)
1511 {
1512         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1513         struct sas_expander_device *rdev;
1514         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1515
1516         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1517                type != SAS_FANOUT_EXPANDER_DEVICE);
1518
1519         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1520         if (!rdev) {
1521                 return NULL;
1522         }
1523
1524         device_initialize(&rdev->rphy.dev);
1525         rdev->rphy.dev.parent = get_device(&parent->dev);
1526         rdev->rphy.dev.release = sas_expander_release;
1527         mutex_lock(&sas_host->lock);
1528         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1529         mutex_unlock(&sas_host->lock);
1530         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1531                      shost->host_no, rdev->rphy.scsi_target_id);
1532         rdev->rphy.identify.device_type = type;
1533         sas_rphy_initialize(&rdev->rphy);
1534         transport_setup_device(&rdev->rphy.dev);
1535
1536         return &rdev->rphy;
1537 }
1538 EXPORT_SYMBOL(sas_expander_alloc);
1539
1540 /**
1541  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1542  * @rphy:       The remote PHY to be added
1543  *
1544  * Publishes a SAS remote PHY to the rest of the system.
1545  */
1546 int sas_rphy_add(struct sas_rphy *rphy)
1547 {
1548         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1549         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1550         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1551         struct sas_identify *identify = &rphy->identify;
1552         int error;
1553
1554         if (parent->rphy)
1555                 return -ENXIO;
1556         parent->rphy = rphy;
1557
1558         error = device_add(&rphy->dev);
1559         if (error)
1560                 return error;
1561         transport_add_device(&rphy->dev);
1562         transport_configure_device(&rphy->dev);
1563         if (sas_bsg_initialize(shost, rphy))
1564                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1565
1566
1567         mutex_lock(&sas_host->lock);
1568         list_add_tail(&rphy->list, &sas_host->rphy_list);
1569         if (identify->device_type == SAS_END_DEVICE &&
1570             (identify->target_port_protocols &
1571              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1572                 rphy->scsi_target_id = sas_host->next_target_id++;
1573         else if (identify->device_type == SAS_END_DEVICE)
1574                 rphy->scsi_target_id = -1;
1575         mutex_unlock(&sas_host->lock);
1576
1577         if (identify->device_type == SAS_END_DEVICE &&
1578             rphy->scsi_target_id != -1) {
1579                 int lun;
1580
1581                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1582                         lun = SCAN_WILD_CARD;
1583                 else
1584                         lun = 0;
1585
1586                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
1587         }
1588
1589         return 0;
1590 }
1591 EXPORT_SYMBOL(sas_rphy_add);
1592
1593 /**
1594  * sas_rphy_free  -  free a SAS remote PHY
1595  * @rphy: SAS remote PHY to free
1596  *
1597  * Frees the specified SAS remote PHY.
1598  *
1599  * Note:
1600  *   This function must only be called on a remote
1601  *   PHY that has not successfully been added using
1602  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1603  */
1604 void sas_rphy_free(struct sas_rphy *rphy)
1605 {
1606         struct device *dev = &rphy->dev;
1607         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1608         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1609
1610         mutex_lock(&sas_host->lock);
1611         list_del(&rphy->list);
1612         mutex_unlock(&sas_host->lock);
1613
1614         transport_destroy_device(dev);
1615
1616         put_device(dev);
1617 }
1618 EXPORT_SYMBOL(sas_rphy_free);
1619
1620 /**
1621  * sas_rphy_delete  -  remove and free SAS remote PHY
1622  * @rphy:       SAS remote PHY to remove and free
1623  *
1624  * Removes the specified SAS remote PHY and frees it.
1625  */
1626 void
1627 sas_rphy_delete(struct sas_rphy *rphy)
1628 {
1629         sas_rphy_remove(rphy);
1630         sas_rphy_free(rphy);
1631 }
1632 EXPORT_SYMBOL(sas_rphy_delete);
1633
1634 /**
1635  * sas_rphy_unlink  -  unlink SAS remote PHY
1636  * @rphy:       SAS remote phy to unlink from its parent port
1637  *
1638  * Removes port reference to an rphy
1639  */
1640 void sas_rphy_unlink(struct sas_rphy *rphy)
1641 {
1642         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1643
1644         parent->rphy = NULL;
1645 }
1646 EXPORT_SYMBOL(sas_rphy_unlink);
1647
1648 /**
1649  * sas_rphy_remove  -  remove SAS remote PHY
1650  * @rphy:       SAS remote phy to remove
1651  *
1652  * Removes the specified SAS remote PHY.
1653  */
1654 void
1655 sas_rphy_remove(struct sas_rphy *rphy)
1656 {
1657         struct device *dev = &rphy->dev;
1658
1659         switch (rphy->identify.device_type) {
1660         case SAS_END_DEVICE:
1661                 scsi_remove_target(dev);
1662                 break;
1663         case SAS_EDGE_EXPANDER_DEVICE:
1664         case SAS_FANOUT_EXPANDER_DEVICE:
1665                 sas_remove_children(dev);
1666                 break;
1667         default:
1668                 break;
1669         }
1670
1671         sas_rphy_unlink(rphy);
1672         sas_bsg_remove(NULL, rphy);
1673         transport_remove_device(dev);
1674         device_del(dev);
1675 }
1676 EXPORT_SYMBOL(sas_rphy_remove);
1677
1678 /**
1679  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1680  * @dev:        device to check
1681  *
1682  * Returns:
1683  *      %1 if the device represents a SAS remote PHY, %0 else
1684  */
1685 int scsi_is_sas_rphy(const struct device *dev)
1686 {
1687         return dev->release == sas_end_device_release ||
1688                 dev->release == sas_expander_release;
1689 }
1690 EXPORT_SYMBOL(scsi_is_sas_rphy);
1691
1692
1693 /*
1694  * SCSI scan helper
1695  */
1696
1697 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1698                 uint id, u64 lun)
1699 {
1700         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1701         struct sas_rphy *rphy;
1702
1703         mutex_lock(&sas_host->lock);
1704         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1705                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1706                     rphy->scsi_target_id == -1)
1707                         continue;
1708
1709                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1710                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1711                         scsi_scan_target(&rphy->dev, 0,
1712                                          rphy->scsi_target_id, lun, 1);
1713                 }
1714         }
1715         mutex_unlock(&sas_host->lock);
1716
1717         return 0;
1718 }
1719
1720
1721 /*
1722  * Setup / Teardown code
1723  */
1724
1725 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1726         i->private_##attrb[count] = dev_attr_##field;           \
1727         i->private_##attrb[count].attr.mode = perm;                     \
1728         i->attrb[count] = &i->private_##attrb[count];                   \
1729         if (test)                                                       \
1730                 count++
1731
1732 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1733         i->private_##attrb[count] = dev_attr_##field;           \
1734         i->private_##attrb[count].attr.mode = perm;                     \
1735         if (ro_test) {                                                  \
1736                 i->private_##attrb[count].attr.mode = ro_perm;          \
1737                 i->private_##attrb[count].store = NULL;                 \
1738         }                                                               \
1739         i->attrb[count] = &i->private_##attrb[count];                   \
1740         if (test)                                                       \
1741                 count++
1742
1743 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1744         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1745
1746 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1747         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1748
1749 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1750         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1751
1752 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1753         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1754                         !i->f->set_phy_speed, S_IRUGO)
1755
1756 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1757         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1758                           !i->f->func, S_IRUGO)
1759
1760 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1761         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1762
1763 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1764         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1765
1766 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1767         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1768
1769 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1770         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1771
1772 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1773         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1774
1775 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1776         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1777
1778 /**
1779  * sas_attach_transport  -  instantiate SAS transport template
1780  * @ft:         SAS transport class function template
1781  */
1782 struct scsi_transport_template *
1783 sas_attach_transport(struct sas_function_template *ft)
1784 {
1785         struct sas_internal *i;
1786         int count;
1787
1788         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1789         if (!i)
1790                 return NULL;
1791
1792         i->t.user_scan = sas_user_scan;
1793
1794         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1795         i->t.host_attrs.ac.class = &sas_host_class.class;
1796         i->t.host_attrs.ac.match = sas_host_match;
1797         transport_container_register(&i->t.host_attrs);
1798         i->t.host_size = sizeof(struct sas_host_attrs);
1799
1800         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1801         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1802         i->phy_attr_cont.ac.match = sas_phy_match;
1803         transport_container_register(&i->phy_attr_cont);
1804
1805         i->port_attr_cont.ac.class = &sas_port_class.class;
1806         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1807         i->port_attr_cont.ac.match = sas_port_match;
1808         transport_container_register(&i->port_attr_cont);
1809
1810         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1811         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1812         i->rphy_attr_cont.ac.match = sas_rphy_match;
1813         transport_container_register(&i->rphy_attr_cont);
1814
1815         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1816         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1817         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1818         transport_container_register(&i->end_dev_attr_cont);
1819
1820         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1821         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1822         i->expander_attr_cont.ac.match = sas_expander_match;
1823         transport_container_register(&i->expander_attr_cont);
1824
1825         i->f = ft;
1826
1827         count = 0;
1828         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1829         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1830         SETUP_PHY_ATTRIBUTE(device_type);
1831         SETUP_PHY_ATTRIBUTE(sas_address);
1832         SETUP_PHY_ATTRIBUTE(phy_identifier);
1833         //SETUP_PHY_ATTRIBUTE(port_identifier);
1834         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1835         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1836         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1837         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1838         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1839
1840         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1841         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1842         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1843         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1844         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1845         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1846         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1847         i->phy_attrs[count] = NULL;
1848
1849         count = 0;
1850         SETUP_PORT_ATTRIBUTE(num_phys);
1851         i->port_attrs[count] = NULL;
1852
1853         count = 0;
1854         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1855         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1856         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1857         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1858         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1859         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1860                                        get_enclosure_identifier);
1861         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1862                                        get_bay_identifier);
1863         i->rphy_attrs[count] = NULL;
1864
1865         count = 0;
1866         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1867         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1868         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1869         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1870         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1871         i->end_dev_attrs[count] = NULL;
1872
1873         count = 0;
1874         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1875         SETUP_EXPANDER_ATTRIBUTE(product_id);
1876         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1877         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1878         SETUP_EXPANDER_ATTRIBUTE(component_id);
1879         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1880         SETUP_EXPANDER_ATTRIBUTE(level);
1881         i->expander_attrs[count] = NULL;
1882
1883         return &i->t;
1884 }
1885 EXPORT_SYMBOL(sas_attach_transport);
1886
1887 /**
1888  * sas_release_transport  -  release SAS transport template instance
1889  * @t:          transport template instance
1890  */
1891 void sas_release_transport(struct scsi_transport_template *t)
1892 {
1893         struct sas_internal *i = to_sas_internal(t);
1894
1895         transport_container_unregister(&i->t.host_attrs);
1896         transport_container_unregister(&i->phy_attr_cont);
1897         transport_container_unregister(&i->port_attr_cont);
1898         transport_container_unregister(&i->rphy_attr_cont);
1899         transport_container_unregister(&i->end_dev_attr_cont);
1900         transport_container_unregister(&i->expander_attr_cont);
1901
1902         kfree(i);
1903 }
1904 EXPORT_SYMBOL(sas_release_transport);
1905
1906 static __init int sas_transport_init(void)
1907 {
1908         int error;
1909
1910         error = transport_class_register(&sas_host_class);
1911         if (error)
1912                 goto out;
1913         error = transport_class_register(&sas_phy_class);
1914         if (error)
1915                 goto out_unregister_transport;
1916         error = transport_class_register(&sas_port_class);
1917         if (error)
1918                 goto out_unregister_phy;
1919         error = transport_class_register(&sas_rphy_class);
1920         if (error)
1921                 goto out_unregister_port;
1922         error = transport_class_register(&sas_end_dev_class);
1923         if (error)
1924                 goto out_unregister_rphy;
1925         error = transport_class_register(&sas_expander_class);
1926         if (error)
1927                 goto out_unregister_end_dev;
1928
1929         return 0;
1930
1931  out_unregister_end_dev:
1932         transport_class_unregister(&sas_end_dev_class);
1933  out_unregister_rphy:
1934         transport_class_unregister(&sas_rphy_class);
1935  out_unregister_port:
1936         transport_class_unregister(&sas_port_class);
1937  out_unregister_phy:
1938         transport_class_unregister(&sas_phy_class);
1939  out_unregister_transport:
1940         transport_class_unregister(&sas_host_class);
1941  out:
1942         return error;
1943
1944 }
1945
1946 static void __exit sas_transport_exit(void)
1947 {
1948         transport_class_unregister(&sas_host_class);
1949         transport_class_unregister(&sas_phy_class);
1950         transport_class_unregister(&sas_port_class);
1951         transport_class_unregister(&sas_rphy_class);
1952         transport_class_unregister(&sas_end_dev_class);
1953         transport_class_unregister(&sas_expander_class);
1954 }
1955
1956 MODULE_AUTHOR("Christoph Hellwig");
1957 MODULE_DESCRIPTION("SAS Transport Attributes");
1958 MODULE_LICENSE("GPL");
1959
1960 module_init(sas_transport_init);
1961 module_exit(sas_transport_exit);