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