drivers/scsi/scsi_transport_sas.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2005-2006 Dell Inc.
   4  *
   5  * Serial Attached SCSI (SAS) transport class.
   6  *
   7  * The SAS transport class contains common code to deal with SAS HBAs,
   8  * an aproximated representation of SAS topologies in the driver model,
   9  * and various sysfs attributes to expose these topologies and management
  10  * interfaces to userspace.
  11  *
  12  * In addition to the basic SCSI core objects this transport class
  13  * introduces two additional intermediate objects:  The SAS PHY
  14  * as represented by struct sas_phy defines an "outgoing" PHY on
  15  * a SAS HBA or Expander, and the SAS remote PHY represented by
  16  * struct sas_rphy defines an "incoming" PHY on a SAS Expander or
  17  * end device.  Note that this is purely a software concept, the
  18  * underlying hardware for a PHY and a remote PHY is the exactly
  19  * the same.
  20  *
  21  * There is no concept of a SAS port in this code, users can see
  22  * what PHYs form a wide port based on the port_identifier attribute,
  23  * which is the same for all PHYs in a port.
  24  */
  25
  26 #include <linux/init.h>
  27 #include <linux/module.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/err.h>
  30 #include <linux/slab.h>
  31 #include <linux/string.h>
  32 #include <linux/blkdev.h>
  33 #include <linux/bsg.h>
  34
  35 #include <scsi/scsi.h>
  36 #include <scsi/scsi_cmnd.h>
  37 #include <scsi/scsi_request.h>
  38 #include <scsi/scsi_device.h>
  39 #include <scsi/scsi_host.h>
  40 #include <scsi/scsi_transport.h>
  41 #include <scsi/scsi_transport_sas.h>
  42
  43 #include "scsi_sas_internal.h"
  44 struct sas_host_attrs {
  45         struct list_head rphy_list;
  46         struct mutex lock;
  47         struct request_queue *q;
  48         u32 next_target_id;
  49         u32 next_expander_id;
  50         int next_port_id;
  51 };
  52 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
  53
  54
  55 /*
  56  * Hack to allow attributes of the same name in different objects.
  57  */
  58 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  59         struct device_attribute dev_attr_##_prefix##_##_name = \
  60         __ATTR(_name,_mode,_show,_store)
  61
  62
  63 /*
  64  * Pretty printing helpers
  65  */
  66
  67 #define sas_bitfield_name_match(title, table)                   \
  68 static ssize_t                                                  \
  69 get_sas_##title##_names(u32 table_key, char *buf)               \
  70 {                                                               \
  71         char *prefix = "";                                      \
  72         ssize_t len = 0;                                        \
  73         int i;                                                  \
  74                                                                 \
  75         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  76                 if (table[i].value & table_key) {               \
  77                         len += sprintf(buf + len, "%s%s",       \
  78                                 prefix, table[i].name);         \
  79                         prefix = ", ";                          \
  80                 }                                               \
  81         }                                                       \
  82         len += sprintf(buf + len, "\n");                        \
  83         return len;                                             \
  84 }
  85
  86 #define sas_bitfield_name_set(title, table)                     \
  87 static ssize_t                                                  \
  88 set_sas_##title##_names(u32 *table_key, const char *buf)        \
  89 {                                                               \
  90         ssize_t len = 0;                                        \
  91         int i;                                                  \
  92                                                                 \
  93         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  94                 len = strlen(table[i].name);                    \
  95                 if (strncmp(buf, table[i].name, len) == 0 &&    \
  96                     (buf[len] == '\n' || buf[len] == '\0')) {   \
  97                         *table_key = table[i].value;            \
  98                         return 0;                               \
  99                 }                                               \
 100         }                                                       \
 101         return -EINVAL;                                         \
 102 }
 103
 104 #define sas_bitfield_name_search(title, table)                  \
 105 static ssize_t                                                  \
 106 get_sas_##title##_names(u32 table_key, char *buf)               \
 107 {                                                               \
 108         ssize_t len = 0;                                        \
 109         int i;                                                  \
 110                                                                 \
 111         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 112                 if (table[i].value == table_key) {              \
 113                         len += sprintf(buf + len, "%s",         \
 114                                 table[i].name);                 \
 115                         break;                                  \
 116                 }                                               \
 117         }                                                       \
 118         len += sprintf(buf + len, "\n");                        \
 119         return len;                                             \
 120 }
 121
 122 static struct {
 123         u32             value;
 124         char            *name;
 125 } sas_device_type_names[] = {
 126         { SAS_PHY_UNUSED,               "unused" },
 127         { SAS_END_DEVICE,               "end device" },
 128         { SAS_EDGE_EXPANDER_DEVICE,     "edge expander" },
 129         { SAS_FANOUT_EXPANDER_DEVICE,   "fanout expander" },
 130 };
 131 sas_bitfield_name_search(device_type, sas_device_type_names)
 132
 133
 134 static struct {
 135         u32             value;
 136         char            *name;
 137 } sas_protocol_names[] = {
 138         { SAS_PROTOCOL_SATA,            "sata" },
 139         { SAS_PROTOCOL_SMP,             "smp" },
 140         { SAS_PROTOCOL_STP,             "stp" },
 141         { SAS_PROTOCOL_SSP,             "ssp" },
 142 };
 143 sas_bitfield_name_match(protocol, sas_protocol_names)
 144
 145 static struct {
 146         u32             value;
 147         char            *name;
 148 } sas_linkspeed_names[] = {
 149         { SAS_LINK_RATE_UNKNOWN,        "Unknown" },
 150         { SAS_PHY_DISABLED,             "Phy disabled" },
 151         { SAS_LINK_RATE_FAILED,         "Link Rate failed" },
 152         { SAS_SATA_SPINUP_HOLD,         "Spin-up hold" },
 153         { SAS_LINK_RATE_1_5_GBPS,       "1.5 Gbit" },
 154         { SAS_LINK_RATE_3_0_GBPS,       "3.0 Gbit" },
 155         { SAS_LINK_RATE_6_0_GBPS,       "6.0 Gbit" },
 156         { SAS_LINK_RATE_12_0_GBPS,      "12.0 Gbit" },
 157 };
 158 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 159 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 160
 161 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 162 {
 163         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 164         struct sas_end_device *rdev;
 165
 166         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 167
 168         rdev = rphy_to_end_device(rphy);
 169         return rdev;
 170 }
 171
 172 static int sas_smp_dispatch(struct bsg_job *job)
 173 {
 174         struct Scsi_Host *shost = dev_to_shost(job->dev);
 175         struct sas_rphy *rphy = NULL;
 176
 177         if (!scsi_is_host_device(job->dev))
 178                 rphy = dev_to_rphy(job->dev);
 179
 180         if (!job->reply_payload.payload_len) {
 181                 dev_warn(job->dev, "space for a smp response is missing\n");
 182                 bsg_job_done(job, -EINVAL, 0);
 183                 return 0;
 184         }
 185
 186         to_sas_internal(shost->transportt)->f->smp_handler(job, shost, rphy);
 187         return 0;
 188 }
 189
 190 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 191 {
 192         struct request_queue *q;
 193
 194         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 195                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 196                 return 0;
 197         }
 198
 199         if (rphy) {
 200                 q = bsg_setup_queue(&rphy->dev, dev_name(&rphy->dev),
 201                                 sas_smp_dispatch, NULL, 0);
 202                 if (IS_ERR(q))
 203                         return PTR_ERR(q);
 204                 rphy->q = q;
 205         } else {
 206                 char name[20];
 207
 208                 snprintf(name, sizeof(name), "sas_host%d", shost->host_no);
 209                 q = bsg_setup_queue(&shost->shost_gendev, name,
 210                                 sas_smp_dispatch, NULL, 0);
 211                 if (IS_ERR(q))
 212                         return PTR_ERR(q);
 213                 to_sas_host_attrs(shost)->q = q;
 214         }
 215
 216         return 0;
 217 }
 218
 219 /*
 220  * SAS host attributes
 221  */
 222
 223 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 224                           struct device *cdev)
 225 {
 226         struct Scsi_Host *shost = dev_to_shost(dev);
 227         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 228
 229         INIT_LIST_HEAD(&sas_host->rphy_list);
 230         mutex_init(&sas_host->lock);
 231         sas_host->next_target_id = 0;
 232         sas_host->next_expander_id = 0;
 233         sas_host->next_port_id = 0;
 234
 235         if (sas_bsg_initialize(shost, NULL))
 236                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 237                            shost->host_no);
 238
 239         return 0;
 240 }
 241
 242 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 243                            struct device *cdev)
 244 {
 245         struct Scsi_Host *shost = dev_to_shost(dev);
 246         struct request_queue *q = to_sas_host_attrs(shost)->q;
 247
 248         bsg_remove_queue(q);
 249         return 0;
 250 }
 251
 252 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 253                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 254
 255 static int sas_host_match(struct attribute_container *cont,
 256                             struct device *dev)
 257 {
 258         struct Scsi_Host *shost;
 259         struct sas_internal *i;
 260
 261         if (!scsi_is_host_device(dev))
 262                 return 0;
 263         shost = dev_to_shost(dev);
 264
 265         if (!shost->transportt)
 266                 return 0;
 267         if (shost->transportt->host_attrs.ac.class !=
 268                         &sas_host_class.class)
 269                 return 0;
 270
 271         i = to_sas_internal(shost->transportt);
 272         return &i->t.host_attrs.ac == cont;
 273 }
 274
 275 static int do_sas_phy_delete(struct device *dev, void *data)
 276 {
 277         int pass = (int)(unsigned long)data;
 278
 279         if (pass == 0 && scsi_is_sas_port(dev))
 280                 sas_port_delete(dev_to_sas_port(dev));
 281         else if (pass == 1 && scsi_is_sas_phy(dev))
 282                 sas_phy_delete(dev_to_phy(dev));
 283         return 0;
 284 }
 285
 286 /**
 287  * sas_remove_children  -  tear down a devices SAS data structures
 288  * @dev:        device belonging to the sas object
 289  *
 290  * Removes all SAS PHYs and remote PHYs for a given object
 291  */
 292 void sas_remove_children(struct device *dev)
 293 {
 294         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 295         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 296 }
 297 EXPORT_SYMBOL(sas_remove_children);
 298
 299 /**
 300  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 301  * @shost:      Scsi Host that is torn down
 302  *
 303  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
 304  * Scsi_Host as well.
 305  *
 306  * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
 307  * already removed.
 308  */
 309 void sas_remove_host(struct Scsi_Host *shost)
 310 {
 311         sas_remove_children(&shost->shost_gendev);
 312         scsi_remove_host(shost);
 313 }
 314 EXPORT_SYMBOL(sas_remove_host);
 315
 316 /**
 317  * sas_get_address - return the SAS address of the device
 318  * @sdev: scsi device
 319  *
 320  * Returns the SAS address of the scsi device
 321  */
 322 u64 sas_get_address(struct scsi_device *sdev)
 323 {
 324         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 325
 326         return rdev->rphy.identify.sas_address;
 327 }
 328 EXPORT_SYMBOL(sas_get_address);
 329
 330 /**
 331  * sas_tlr_supported - checking TLR bit in vpd 0x90
 332  * @sdev: scsi device struct
 333  *
 334  * Check Transport Layer Retries are supported or not.
 335  * If vpd page 0x90 is present, TRL is supported.
 336  *
 337  */
 338 unsigned int
 339 sas_tlr_supported(struct scsi_device *sdev)
 340 {
 341         const int vpd_len = 32;
 342         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 343         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 344         int ret = 0;
 345
 346         if (!buffer)
 347                 goto out;
 348
 349         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 350                 goto out;
 351
 352         /*
 353          * Magic numbers: the VPD Protocol page (0x90)
 354          * has a 4 byte header and then one entry per device port
 355          * the TLR bit is at offset 8 on each port entry
 356          * if we take the first port, that's at total offset 12
 357          */
 358         ret = buffer[12] & 0x01;
 359
 360  out:
 361         kfree(buffer);
 362         rdev->tlr_supported = ret;
 363         return ret;
 364
 365 }
 366 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 367
 368 /**
 369  * sas_disable_tlr - setting TLR flags
 370  * @sdev: scsi device struct
 371  *
 372  * Seting tlr_enabled flag to 0.
 373  *
 374  */
 375 void
 376 sas_disable_tlr(struct scsi_device *sdev)
 377 {
 378         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 379
 380         rdev->tlr_enabled = 0;
 381 }
 382 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 383
 384 /**
 385  * sas_enable_tlr - setting TLR flags
 386  * @sdev: scsi device struct
 387  *
 388  * Seting tlr_enabled flag 1.
 389  *
 390  */
 391 void sas_enable_tlr(struct scsi_device *sdev)
 392 {
 393         unsigned int tlr_supported = 0;
 394         tlr_supported  = sas_tlr_supported(sdev);
 395
 396         if (tlr_supported) {
 397                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 398
 399                 rdev->tlr_enabled = 1;
 400         }
 401
 402         return;
 403 }
 404 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 405
 406 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 407 {
 408         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 409         return rdev->tlr_enabled;
 410 }
 411 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 412
 413 /*
 414  * SAS Phy attributes
 415  */
 416
 417 #define sas_phy_show_simple(field, name, format_string, cast)           \
 418 static ssize_t                                                          \
 419 show_sas_phy_##name(struct device *dev,                                 \
 420                     struct device_attribute *attr, char *buf)           \
 421 {                                                                       \
 422         struct sas_phy *phy = transport_class_to_phy(dev);              \
 423                                                                         \
 424         return snprintf(buf, 20, format_string, cast phy->field);       \
 425 }
 426
 427 #define sas_phy_simple_attr(field, name, format_string, type)           \
 428         sas_phy_show_simple(field, name, format_string, (type)) \
 429 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 430
 431 #define sas_phy_show_protocol(field, name)                              \
 432 static ssize_t                                                          \
 433 show_sas_phy_##name(struct device *dev,                                 \
 434                     struct device_attribute *attr, char *buf)           \
 435 {                                                                       \
 436         struct sas_phy *phy = transport_class_to_phy(dev);              \
 437                                                                         \
 438         if (!phy->field)                                                \
 439                 return snprintf(buf, 20, "none\n");                     \
 440         return get_sas_protocol_names(phy->field, buf);         \
 441 }
 442
 443 #define sas_phy_protocol_attr(field, name)                              \
 444         sas_phy_show_protocol(field, name)                              \
 445 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 446
 447 #define sas_phy_show_linkspeed(field)                                   \
 448 static ssize_t                                                          \
 449 show_sas_phy_##field(struct device *dev,                                \
 450                      struct device_attribute *attr, char *buf)          \
 451 {                                                                       \
 452         struct sas_phy *phy = transport_class_to_phy(dev);              \
 453                                                                         \
 454         return get_sas_linkspeed_names(phy->field, buf);                \
 455 }
 456
 457 /* Fudge to tell if we're minimum or maximum */
 458 #define sas_phy_store_linkspeed(field)                                  \
 459 static ssize_t                                                          \
 460 store_sas_phy_##field(struct device *dev,                               \
 461                       struct device_attribute *attr,                    \
 462                       const char *buf,  size_t count)                   \
 463 {                                                                       \
 464         struct sas_phy *phy = transport_class_to_phy(dev);              \
 465         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 466         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 467         u32 value;                                                      \
 468         struct sas_phy_linkrates rates = {0};                           \
 469         int error;                                                      \
 470                                                                         \
 471         error = set_sas_linkspeed_names(&value, buf);                   \
 472         if (error)                                                      \
 473                 return error;                                           \
 474         rates.field = value;                                            \
 475         error = i->f->set_phy_speed(phy, &rates);                       \
 476                                                                         \
 477         return error ? error : count;                                   \
 478 }
 479
 480 #define sas_phy_linkspeed_rw_attr(field)                                \
 481         sas_phy_show_linkspeed(field)                                   \
 482         sas_phy_store_linkspeed(field)                                  \
 483 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 484         store_sas_phy_##field)
 485
 486 #define sas_phy_linkspeed_attr(field)                                   \
 487         sas_phy_show_linkspeed(field)                                   \
 488 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 489
 490
 491 #define sas_phy_show_linkerror(field)                                   \
 492 static ssize_t                                                          \
 493 show_sas_phy_##field(struct device *dev,                                \
 494                      struct device_attribute *attr, char *buf)          \
 495 {                                                                       \
 496         struct sas_phy *phy = transport_class_to_phy(dev);              \
 497         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 498         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 499         int error;                                                      \
 500                                                                         \
 501         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 502         if (error)                                                      \
 503                 return error;                                           \
 504         return snprintf(buf, 20, "%u\n", phy->field);                   \
 505 }
 506
 507 #define sas_phy_linkerror_attr(field)                                   \
 508         sas_phy_show_linkerror(field)                                   \
 509 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 510
 511
 512 static ssize_t
 513 show_sas_device_type(struct device *dev,
 514                      struct device_attribute *attr, char *buf)
 515 {
 516         struct sas_phy *phy = transport_class_to_phy(dev);
 517
 518         if (!phy->identify.device_type)
 519                 return snprintf(buf, 20, "none\n");
 520         return get_sas_device_type_names(phy->identify.device_type, buf);
 521 }
 522 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 523
 524 static ssize_t do_sas_phy_enable(struct device *dev,
 525                 size_t count, int enable)
 526 {
 527         struct sas_phy *phy = transport_class_to_phy(dev);
 528         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 529         struct sas_internal *i = to_sas_internal(shost->transportt);
 530         int error;
 531
 532         error = i->f->phy_enable(phy, enable);
 533         if (error)
 534                 return error;
 535         phy->enabled = enable;
 536         return count;
 537 };
 538
 539 static ssize_t
 540 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 541                      const char *buf, size_t count)
 542 {
 543         if (count < 1)
 544                 return -EINVAL;
 545
 546         switch (buf[0]) {
 547         case '0':
 548                 do_sas_phy_enable(dev, count, 0);
 549                 break;
 550         case '1':
 551                 do_sas_phy_enable(dev, count, 1);
 552                 break;
 553         default:
 554                 return -EINVAL;
 555         }
 556
 557         return count;
 558 }
 559
 560 static ssize_t
 561 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 562                     char *buf)
 563 {
 564         struct sas_phy *phy = transport_class_to_phy(dev);
 565
 566         return snprintf(buf, 20, "%d", phy->enabled);
 567 }
 568
 569 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 570                          store_sas_phy_enable);
 571
 572 static ssize_t
 573 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 574 {
 575         struct sas_phy *phy = transport_class_to_phy(dev);
 576         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 577         struct sas_internal *i = to_sas_internal(shost->transportt);
 578         int error;
 579
 580         error = i->f->phy_reset(phy, hard_reset);
 581         if (error)
 582                 return error;
 583         phy->enabled = 1;
 584         return count;
 585 };
 586
 587 static ssize_t
 588 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 589                      const char *buf, size_t count)
 590 {
 591         return do_sas_phy_reset(dev, count, 0);
 592 }
 593 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 594
 595 static ssize_t
 596 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 597                      const char *buf, size_t count)
 598 {
 599         return do_sas_phy_reset(dev, count, 1);
 600 }
 601 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 602
 603 sas_phy_protocol_attr(identify.initiator_port_protocols,
 604                 initiator_port_protocols);
 605 sas_phy_protocol_attr(identify.target_port_protocols,
 606                 target_port_protocols);
 607 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 608                 unsigned long long);
 609 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 610 sas_phy_linkspeed_attr(negotiated_linkrate);
 611 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 612 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 613 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 614 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 615 sas_phy_linkerror_attr(invalid_dword_count);
 616 sas_phy_linkerror_attr(running_disparity_error_count);
 617 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 618 sas_phy_linkerror_attr(phy_reset_problem_count);
 619
 620 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 621                          struct device *cdev)
 622 {
 623         struct sas_phy *phy = dev_to_phy(dev);
 624         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 625         struct sas_internal *i = to_sas_internal(shost->transportt);
 626
 627         if (i->f->phy_setup)
 628                 i->f->phy_setup(phy);
 629
 630         return 0;
 631 }
 632
 633 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 634                 "sas_phy", sas_phy_setup, NULL, NULL);
 635
 636 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 637 {
 638         struct Scsi_Host *shost;
 639         struct sas_internal *i;
 640
 641         if (!scsi_is_sas_phy(dev))
 642                 return 0;
 643         shost = dev_to_shost(dev->parent);
 644
 645         if (!shost->transportt)
 646                 return 0;
 647         if (shost->transportt->host_attrs.ac.class !=
 648                         &sas_host_class.class)
 649                 return 0;
 650
 651         i = to_sas_internal(shost->transportt);
 652         return &i->phy_attr_cont.ac == cont;
 653 }
 654
 655 static void sas_phy_release(struct device *dev)
 656 {
 657         struct sas_phy *phy = dev_to_phy(dev);
 658         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 659         struct sas_internal *i = to_sas_internal(shost->transportt);
 660
 661         if (i->f->phy_release)
 662                 i->f->phy_release(phy);
 663         put_device(dev->parent);
 664         kfree(phy);
 665 }
 666
 667 /**
 668  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 669  * @parent:     Parent device
 670  * @number:     Phy index
 671  *
 672  * Allocates an SAS PHY structure.  It will be added in the device tree
 673  * below the device specified by @parent, which has to be either a Scsi_Host
 674  * or sas_rphy.
 675  *
 676  * Returns:
 677  *      SAS PHY allocated or %NULL if the allocation failed.
 678  */
 679 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 680 {
 681         struct Scsi_Host *shost = dev_to_shost(parent);
 682         struct sas_phy *phy;
 683
 684         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 685         if (!phy)
 686                 return NULL;
 687
 688         phy->number = number;
 689         phy->enabled = 1;
 690
 691         device_initialize(&phy->dev);
 692         phy->dev.parent = get_device(parent);
 693         phy->dev.release = sas_phy_release;
 694         INIT_LIST_HEAD(&phy->port_siblings);
 695         if (scsi_is_sas_expander_device(parent)) {
 696                 struct sas_rphy *rphy = dev_to_rphy(parent);
 697                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 698                         rphy->scsi_target_id, number);
 699         } else
 700                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 701
 702         transport_setup_device(&phy->dev);
 703
 704         return phy;
 705 }
 706 EXPORT_SYMBOL(sas_phy_alloc);
 707
 708 /**
 709  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 710  * @phy:        The PHY to be added
 711  *
 712  * Publishes a SAS PHY to the rest of the system.
 713  */
 714 int sas_phy_add(struct sas_phy *phy)
 715 {
 716         int error;
 717
 718         error = device_add(&phy->dev);
 719         if (!error) {
 720                 transport_add_device(&phy->dev);
 721                 transport_configure_device(&phy->dev);
 722         }
 723
 724         return error;
 725 }
 726 EXPORT_SYMBOL(sas_phy_add);
 727
 728 /**
 729  * sas_phy_free  -  free a SAS PHY
 730  * @phy:        SAS PHY to free
 731  *
 732  * Frees the specified SAS PHY.
 733  *
 734  * Note:
 735  *   This function must only be called on a PHY that has not
 736  *   successfully been added using sas_phy_add().
 737  */
 738 void sas_phy_free(struct sas_phy *phy)
 739 {
 740         transport_destroy_device(&phy->dev);
 741         put_device(&phy->dev);
 742 }
 743 EXPORT_SYMBOL(sas_phy_free);
 744
 745 /**
 746  * sas_phy_delete  -  remove SAS PHY
 747  * @phy:        SAS PHY to remove
 748  *
 749  * Removes the specified SAS PHY.  If the SAS PHY has an
 750  * associated remote PHY it is removed before.
 751  */
 752 void
 753 sas_phy_delete(struct sas_phy *phy)
 754 {
 755         struct device *dev = &phy->dev;
 756
 757         /* this happens if the phy is still part of a port when deleted */
 758         BUG_ON(!list_empty(&phy->port_siblings));
 759
 760         transport_remove_device(dev);
 761         device_del(dev);
 762         transport_destroy_device(dev);
 763         put_device(dev);
 764 }
 765 EXPORT_SYMBOL(sas_phy_delete);
 766
 767 /**
 768  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 769  * @dev:        device to check
 770  *
 771  * Returns:
 772  *      %1 if the device represents a SAS PHY, %0 else
 773  */
 774 int scsi_is_sas_phy(const struct device *dev)
 775 {
 776         return dev->release == sas_phy_release;
 777 }
 778 EXPORT_SYMBOL(scsi_is_sas_phy);
 779
 780 /*
 781  * SAS Port attributes
 782  */
 783 #define sas_port_show_simple(field, name, format_string, cast)          \
 784 static ssize_t                                                          \
 785 show_sas_port_##name(struct device *dev,                                \
 786                      struct device_attribute *attr, char *buf)          \
 787 {                                                                       \
 788         struct sas_port *port = transport_class_to_sas_port(dev);       \
 789                                                                         \
 790         return snprintf(buf, 20, format_string, cast port->field);      \
 791 }
 792
 793 #define sas_port_simple_attr(field, name, format_string, type)          \
 794         sas_port_show_simple(field, name, format_string, (type))        \
 795 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 796
 797 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 798
 799 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 800                                "sas_port", NULL, NULL, NULL);
 801
 802 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 803 {
 804         struct Scsi_Host *shost;
 805         struct sas_internal *i;
 806
 807         if (!scsi_is_sas_port(dev))
 808                 return 0;
 809         shost = dev_to_shost(dev->parent);
 810
 811         if (!shost->transportt)
 812                 return 0;
 813         if (shost->transportt->host_attrs.ac.class !=
 814                         &sas_host_class.class)
 815                 return 0;
 816
 817         i = to_sas_internal(shost->transportt);
 818         return &i->port_attr_cont.ac == cont;
 819 }
 820
 821
 822 static void sas_port_release(struct device *dev)
 823 {
 824         struct sas_port *port = dev_to_sas_port(dev);
 825
 826         BUG_ON(!list_empty(&port->phy_list));
 827
 828         put_device(dev->parent);
 829         kfree(port);
 830 }
 831
 832 static void sas_port_create_link(struct sas_port *port,
 833                                  struct sas_phy *phy)
 834 {
 835         int res;
 836
 837         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 838                                 dev_name(&phy->dev));
 839         if (res)
 840                 goto err;
 841         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 842         if (res)
 843                 goto err;
 844         return;
 845 err:
 846         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 847                __func__, res);
 848 }
 849
 850 static void sas_port_delete_link(struct sas_port *port,
 851                                  struct sas_phy *phy)
 852 {
 853         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 854         sysfs_remove_link(&phy->dev.kobj, "port");
 855 }
 856
 857 /** sas_port_alloc - allocate and initialize a SAS port structure
 858  *
 859  * @parent:     parent device
 860  * @port_id:    port number
 861  *
 862  * Allocates a SAS port structure.  It will be added to the device tree
 863  * below the device specified by @parent which must be either a Scsi_Host
 864  * or a sas_expander_device.
 865  *
 866  * Returns %NULL on error
 867  */
 868 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 869 {
 870         struct Scsi_Host *shost = dev_to_shost(parent);
 871         struct sas_port *port;
 872
 873         port = kzalloc(sizeof(*port), GFP_KERNEL);
 874         if (!port)
 875                 return NULL;
 876
 877         port->port_identifier = port_id;
 878
 879         device_initialize(&port->dev);
 880
 881         port->dev.parent = get_device(parent);
 882         port->dev.release = sas_port_release;
 883
 884         mutex_init(&port->phy_list_mutex);
 885         INIT_LIST_HEAD(&port->phy_list);
 886
 887         if (scsi_is_sas_expander_device(parent)) {
 888                 struct sas_rphy *rphy = dev_to_rphy(parent);
 889                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 890                              rphy->scsi_target_id, port->port_identifier);
 891         } else
 892                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 893                              port->port_identifier);
 894
 895         transport_setup_device(&port->dev);
 896
 897         return port;
 898 }
 899 EXPORT_SYMBOL(sas_port_alloc);
 900
 901 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 902  *
 903  * @parent:     parent device
 904  *
 905  * Allocates a SAS port structure and a number to go with it.  This
 906  * interface is really for adapters where the port number has no
 907  * meansing, so the sas class should manage them.  It will be added to
 908  * the device tree below the device specified by @parent which must be
 909  * either a Scsi_Host or a sas_expander_device.
 910  *
 911  * Returns %NULL on error
 912  */
 913 struct sas_port *sas_port_alloc_num(struct device *parent)
 914 {
 915         int index;
 916         struct Scsi_Host *shost = dev_to_shost(parent);
 917         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 918
 919         /* FIXME: use idr for this eventually */
 920         mutex_lock(&sas_host->lock);
 921         if (scsi_is_sas_expander_device(parent)) {
 922                 struct sas_rphy *rphy = dev_to_rphy(parent);
 923                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 924
 925                 index = exp->next_port_id++;
 926         } else
 927                 index = sas_host->next_port_id++;
 928         mutex_unlock(&sas_host->lock);
 929         return sas_port_alloc(parent, index);
 930 }
 931 EXPORT_SYMBOL(sas_port_alloc_num);
 932
 933 /**
 934  * sas_port_add - add a SAS port to the device hierarchy
 935  * @port:       port to be added
 936  *
 937  * publishes a port to the rest of the system
 938  */
 939 int sas_port_add(struct sas_port *port)
 940 {
 941         int error;
 942
 943         /* No phys should be added until this is made visible */
 944         BUG_ON(!list_empty(&port->phy_list));
 945
 946         error = device_add(&port->dev);
 947
 948         if (error)
 949                 return error;
 950
 951         transport_add_device(&port->dev);
 952         transport_configure_device(&port->dev);
 953
 954         return 0;
 955 }
 956 EXPORT_SYMBOL(sas_port_add);
 957
 958 /**
 959  * sas_port_free  -  free a SAS PORT
 960  * @port:       SAS PORT to free
 961  *
 962  * Frees the specified SAS PORT.
 963  *
 964  * Note:
 965  *   This function must only be called on a PORT that has not
 966  *   successfully been added using sas_port_add().
 967  */
 968 void sas_port_free(struct sas_port *port)
 969 {
 970         transport_destroy_device(&port->dev);
 971         put_device(&port->dev);
 972 }
 973 EXPORT_SYMBOL(sas_port_free);
 974
 975 /**
 976  * sas_port_delete  -  remove SAS PORT
 977  * @port:       SAS PORT to remove
 978  *
 979  * Removes the specified SAS PORT.  If the SAS PORT has an
 980  * associated phys, unlink them from the port as well.
 981  */
 982 void sas_port_delete(struct sas_port *port)
 983 {
 984         struct device *dev = &port->dev;
 985         struct sas_phy *phy, *tmp_phy;
 986
 987         if (port->rphy) {
 988                 sas_rphy_delete(port->rphy);
 989                 port->rphy = NULL;
 990         }
 991
 992         mutex_lock(&port->phy_list_mutex);
 993         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
 994                                  port_siblings) {
 995                 sas_port_delete_link(port, phy);
 996                 list_del_init(&phy->port_siblings);
 997         }
 998         mutex_unlock(&port->phy_list_mutex);
 999
1000         if (port->is_backlink) {
1001                 struct device *parent = port->dev.parent;
1002
1003                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1004                 port->is_backlink = 0;
1005         }
1006
1007         transport_remove_device(dev);
1008         device_del(dev);
1009         transport_destroy_device(dev);
1010         put_device(dev);
1011 }
1012 EXPORT_SYMBOL(sas_port_delete);
1013
1014 /**
1015  * scsi_is_sas_port -  check if a struct device represents a SAS port
1016  * @dev:        device to check
1017  *
1018  * Returns:
1019  *      %1 if the device represents a SAS Port, %0 else
1020  */
1021 int scsi_is_sas_port(const struct device *dev)
1022 {
1023         return dev->release == sas_port_release;
1024 }
1025 EXPORT_SYMBOL(scsi_is_sas_port);
1026
1027 /**
1028  * sas_port_get_phy - try to take a reference on a port member
1029  * @port: port to check
1030  */
1031 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1032 {
1033         struct sas_phy *phy;
1034
1035         mutex_lock(&port->phy_list_mutex);
1036         if (list_empty(&port->phy_list))
1037                 phy = NULL;
1038         else {
1039                 struct list_head *ent = port->phy_list.next;
1040
1041                 phy = list_entry(ent, typeof(*phy), port_siblings);
1042                 get_device(&phy->dev);
1043         }
1044         mutex_unlock(&port->phy_list_mutex);
1045
1046         return phy;
1047 }
1048 EXPORT_SYMBOL(sas_port_get_phy);
1049
1050 /**
1051  * sas_port_add_phy - add another phy to a port to form a wide port
1052  * @port:       port to add the phy to
1053  * @phy:        phy to add
1054  *
1055  * When a port is initially created, it is empty (has no phys).  All
1056  * ports must have at least one phy to operated, and all wide ports
1057  * must have at least two.  The current code makes no difference
1058  * between ports and wide ports, but the only object that can be
1059  * connected to a remote device is a port, so ports must be formed on
1060  * all devices with phys if they're connected to anything.
1061  */
1062 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1063 {
1064         mutex_lock(&port->phy_list_mutex);
1065         if (unlikely(!list_empty(&phy->port_siblings))) {
1066                 /* make sure we're already on this port */
1067                 struct sas_phy *tmp;
1068
1069                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1070                         if (tmp == phy)
1071                                 break;
1072                 /* If this trips, you added a phy that was already
1073                  * part of a different port */
1074                 if (unlikely(tmp != phy)) {
1075                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1076                                    dev_name(&phy->dev));
1077                         BUG();
1078                 }
1079         } else {
1080                 sas_port_create_link(port, phy);
1081                 list_add_tail(&phy->port_siblings, &port->phy_list);
1082                 port->num_phys++;
1083         }
1084         mutex_unlock(&port->phy_list_mutex);
1085 }
1086 EXPORT_SYMBOL(sas_port_add_phy);
1087
1088 /**
1089  * sas_port_delete_phy - remove a phy from a port or wide port
1090  * @port:       port to remove the phy from
1091  * @phy:        phy to remove
1092  *
1093  * This operation is used for tearing down ports again.  It must be
1094  * done to every port or wide port before calling sas_port_delete.
1095  */
1096 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1097 {
1098         mutex_lock(&port->phy_list_mutex);
1099         sas_port_delete_link(port, phy);
1100         list_del_init(&phy->port_siblings);
1101         port->num_phys--;
1102         mutex_unlock(&port->phy_list_mutex);
1103 }
1104 EXPORT_SYMBOL(sas_port_delete_phy);
1105
1106 void sas_port_mark_backlink(struct sas_port *port)
1107 {
1108         int res;
1109         struct device *parent = port->dev.parent->parent->parent;
1110
1111         if (port->is_backlink)
1112                 return;
1113         port->is_backlink = 1;
1114         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1115                                 dev_name(parent));
1116         if (res)
1117                 goto err;
1118         return;
1119 err:
1120         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1121                __func__, res);
1122
1123 }
1124 EXPORT_SYMBOL(sas_port_mark_backlink);
1125
1126 /*
1127  * SAS remote PHY attributes.
1128  */
1129
1130 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1131 static ssize_t                                                          \
1132 show_sas_rphy_##name(struct device *dev,                                \
1133                      struct device_attribute *attr, char *buf)          \
1134 {                                                                       \
1135         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1136                                                                         \
1137         return snprintf(buf, 20, format_string, cast rphy->field);      \
1138 }
1139
1140 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1141         sas_rphy_show_simple(field, name, format_string, (type))        \
1142 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1143                 show_sas_rphy_##name, NULL)
1144
1145 #define sas_rphy_show_protocol(field, name)                             \
1146 static ssize_t                                                          \
1147 show_sas_rphy_##name(struct device *dev,                                \
1148                      struct device_attribute *attr, char *buf)          \
1149 {                                                                       \
1150         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1151                                                                         \
1152         if (!rphy->field)                                       \
1153                 return snprintf(buf, 20, "none\n");                     \
1154         return get_sas_protocol_names(rphy->field, buf);        \
1155 }
1156
1157 #define sas_rphy_protocol_attr(field, name)                             \
1158         sas_rphy_show_protocol(field, name)                             \
1159 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1160                 show_sas_rphy_##name, NULL)
1161
1162 static ssize_t
1163 show_sas_rphy_device_type(struct device *dev,
1164                           struct device_attribute *attr, char *buf)
1165 {
1166         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1167
1168         if (!rphy->identify.device_type)
1169                 return snprintf(buf, 20, "none\n");
1170         return get_sas_device_type_names(
1171                         rphy->identify.device_type, buf);
1172 }
1173
1174 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1175                 show_sas_rphy_device_type, NULL);
1176
1177 static ssize_t
1178 show_sas_rphy_enclosure_identifier(struct device *dev,
1179                                    struct device_attribute *attr, char *buf)
1180 {
1181         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1182         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1183         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1184         struct sas_internal *i = to_sas_internal(shost->transportt);
1185         u64 identifier;
1186         int error;
1187
1188         error = i->f->get_enclosure_identifier(rphy, &identifier);
1189         if (error)
1190                 return error;
1191         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1192 }
1193
1194 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1195                 show_sas_rphy_enclosure_identifier, NULL);
1196
1197 static ssize_t
1198 show_sas_rphy_bay_identifier(struct device *dev,
1199                              struct device_attribute *attr, char *buf)
1200 {
1201         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1202         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1203         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1204         struct sas_internal *i = to_sas_internal(shost->transportt);
1205         int val;
1206
1207         val = i->f->get_bay_identifier(rphy);
1208         if (val < 0)
1209                 return val;
1210         return sprintf(buf, "%d\n", val);
1211 }
1212
1213 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1214                 show_sas_rphy_bay_identifier, NULL);
1215
1216 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1217                 initiator_port_protocols);
1218 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1219 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1220                 unsigned long long);
1221 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1222 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1223
1224 /* only need 8 bytes of data plus header (4 or 8) */
1225 #define BUF_SIZE 64
1226
1227 int sas_read_port_mode_page(struct scsi_device *sdev)
1228 {
1229         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1230         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1231         struct scsi_mode_data mode_data;
1232         int res, error;
1233
1234         if (!buffer)
1235                 return -ENOMEM;
1236
1237         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1238                               &mode_data, NULL);
1239
1240         error = -EINVAL;
1241         if (!scsi_status_is_good(res))
1242                 goto out;
1243
1244         msdata = buffer +  mode_data.header_length +
1245                 mode_data.block_descriptor_length;
1246
1247         if (msdata - buffer > BUF_SIZE - 8)
1248                 goto out;
1249
1250         error = 0;
1251
1252         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1253         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1254         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1255
1256  out:
1257         kfree(buffer);
1258         return error;
1259 }
1260 EXPORT_SYMBOL(sas_read_port_mode_page);
1261
1262 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1263                                "sas_end_device", NULL, NULL, NULL);
1264
1265 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1266 static ssize_t                                                          \
1267 show_sas_end_dev_##name(struct device *dev,                             \
1268                         struct device_attribute *attr, char *buf)       \
1269 {                                                                       \
1270         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1271         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1272                                                                         \
1273         return snprintf(buf, 20, format_string, cast rdev->field);      \
1274 }
1275
1276 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1277         sas_end_dev_show_simple(field, name, format_string, (type))     \
1278 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1279                 show_sas_end_dev_##name, NULL)
1280
1281 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1282 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1283                         "%d\n", int);
1284 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1285                         "%d\n", int);
1286 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1287                         "%d\n", int);
1288 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1289                         "%d\n", int);
1290
1291 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1292                                "sas_expander", NULL, NULL, NULL);
1293
1294 #define sas_expander_show_simple(field, name, format_string, cast)      \
1295 static ssize_t                                                          \
1296 show_sas_expander_##name(struct device *dev,                            \
1297                          struct device_attribute *attr, char *buf)      \
1298 {                                                                       \
1299         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1300         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1301                                                                         \
1302         return snprintf(buf, 20, format_string, cast edev->field);      \
1303 }
1304
1305 #define sas_expander_simple_attr(field, name, format_string, type)      \
1306         sas_expander_show_simple(field, name, format_string, (type))    \
1307 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1308                 show_sas_expander_##name, NULL)
1309
1310 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1311 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1312 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1313 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1314                          "%s\n", char *);
1315 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1316 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1317                          unsigned int);
1318 sas_expander_simple_attr(level, level, "%d\n", int);
1319
1320 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1321                 "sas_device", NULL, NULL, NULL);
1322
1323 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1324 {
1325         struct Scsi_Host *shost;
1326         struct sas_internal *i;
1327
1328         if (!scsi_is_sas_rphy(dev))
1329                 return 0;
1330         shost = dev_to_shost(dev->parent->parent);
1331
1332         if (!shost->transportt)
1333                 return 0;
1334         if (shost->transportt->host_attrs.ac.class !=
1335                         &sas_host_class.class)
1336                 return 0;
1337
1338         i = to_sas_internal(shost->transportt);
1339         return &i->rphy_attr_cont.ac == cont;
1340 }
1341
1342 static int sas_end_dev_match(struct attribute_container *cont,
1343                              struct device *dev)
1344 {
1345         struct Scsi_Host *shost;
1346         struct sas_internal *i;
1347         struct sas_rphy *rphy;
1348
1349         if (!scsi_is_sas_rphy(dev))
1350                 return 0;
1351         shost = dev_to_shost(dev->parent->parent);
1352         rphy = dev_to_rphy(dev);
1353
1354         if (!shost->transportt)
1355                 return 0;
1356         if (shost->transportt->host_attrs.ac.class !=
1357                         &sas_host_class.class)
1358                 return 0;
1359
1360         i = to_sas_internal(shost->transportt);
1361         return &i->end_dev_attr_cont.ac == cont &&
1362                 rphy->identify.device_type == SAS_END_DEVICE;
1363 }
1364
1365 static int sas_expander_match(struct attribute_container *cont,
1366                               struct device *dev)
1367 {
1368         struct Scsi_Host *shost;
1369         struct sas_internal *i;
1370         struct sas_rphy *rphy;
1371
1372         if (!scsi_is_sas_rphy(dev))
1373                 return 0;
1374         shost = dev_to_shost(dev->parent->parent);
1375         rphy = dev_to_rphy(dev);
1376
1377         if (!shost->transportt)
1378                 return 0;
1379         if (shost->transportt->host_attrs.ac.class !=
1380                         &sas_host_class.class)
1381                 return 0;
1382
1383         i = to_sas_internal(shost->transportt);
1384         return &i->expander_attr_cont.ac == cont &&
1385                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1386                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1387 }
1388
1389 static void sas_expander_release(struct device *dev)
1390 {
1391         struct sas_rphy *rphy = dev_to_rphy(dev);
1392         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1393
1394         if (rphy->q)
1395                 blk_cleanup_queue(rphy->q);
1396
1397         put_device(dev->parent);
1398         kfree(edev);
1399 }
1400
1401 static void sas_end_device_release(struct device *dev)
1402 {
1403         struct sas_rphy *rphy = dev_to_rphy(dev);
1404         struct sas_end_device *edev = rphy_to_end_device(rphy);
1405
1406         if (rphy->q)
1407                 blk_cleanup_queue(rphy->q);
1408
1409         put_device(dev->parent);
1410         kfree(edev);
1411 }
1412
1413 /**
1414  * sas_rphy_initialize - common rphy initialization
1415  * @rphy:       rphy to initialise
1416  *
1417  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1418  * initialise the common rphy component of each.
1419  */
1420 static void sas_rphy_initialize(struct sas_rphy *rphy)
1421 {
1422         INIT_LIST_HEAD(&rphy->list);
1423 }
1424
1425 /**
1426  * sas_end_device_alloc - allocate an rphy for an end device
1427  * @parent: which port
1428  *
1429  * Allocates an SAS remote PHY structure, connected to @parent.
1430  *
1431  * Returns:
1432  *      SAS PHY allocated or %NULL if the allocation failed.
1433  */
1434 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1435 {
1436         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1437         struct sas_end_device *rdev;
1438
1439         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1440         if (!rdev) {
1441                 return NULL;
1442         }
1443
1444         device_initialize(&rdev->rphy.dev);
1445         rdev->rphy.dev.parent = get_device(&parent->dev);
1446         rdev->rphy.dev.release = sas_end_device_release;
1447         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1448                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1449                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1450                              shost->host_no, rphy->scsi_target_id,
1451                              parent->port_identifier);
1452         } else
1453                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1454                              shost->host_no, parent->port_identifier);
1455         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1456         sas_rphy_initialize(&rdev->rphy);
1457         transport_setup_device(&rdev->rphy.dev);
1458
1459         return &rdev->rphy;
1460 }
1461 EXPORT_SYMBOL(sas_end_device_alloc);
1462
1463 /**
1464  * sas_expander_alloc - allocate an rphy for an end device
1465  * @parent: which port
1466  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1467  *
1468  * Allocates an SAS remote PHY structure, connected to @parent.
1469  *
1470  * Returns:
1471  *      SAS PHY allocated or %NULL if the allocation failed.
1472  */
1473 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1474                                     enum sas_device_type type)
1475 {
1476         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1477         struct sas_expander_device *rdev;
1478         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1479
1480         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1481                type != SAS_FANOUT_EXPANDER_DEVICE);
1482
1483         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1484         if (!rdev) {
1485                 return NULL;
1486         }
1487
1488         device_initialize(&rdev->rphy.dev);
1489         rdev->rphy.dev.parent = get_device(&parent->dev);
1490         rdev->rphy.dev.release = sas_expander_release;
1491         mutex_lock(&sas_host->lock);
1492         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1493         mutex_unlock(&sas_host->lock);
1494         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1495                      shost->host_no, rdev->rphy.scsi_target_id);
1496         rdev->rphy.identify.device_type = type;
1497         sas_rphy_initialize(&rdev->rphy);
1498         transport_setup_device(&rdev->rphy.dev);
1499
1500         return &rdev->rphy;
1501 }
1502 EXPORT_SYMBOL(sas_expander_alloc);
1503
1504 /**
1505  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1506  * @rphy:       The remote PHY to be added
1507  *
1508  * Publishes a SAS remote PHY to the rest of the system.
1509  */
1510 int sas_rphy_add(struct sas_rphy *rphy)
1511 {
1512         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1513         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1514         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1515         struct sas_identify *identify = &rphy->identify;
1516         int error;
1517
1518         if (parent->rphy)
1519                 return -ENXIO;
1520         parent->rphy = rphy;
1521
1522         error = device_add(&rphy->dev);
1523         if (error)
1524                 return error;
1525         transport_add_device(&rphy->dev);
1526         transport_configure_device(&rphy->dev);
1527         if (sas_bsg_initialize(shost, rphy))
1528                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1529
1530
1531         mutex_lock(&sas_host->lock);
1532         list_add_tail(&rphy->list, &sas_host->rphy_list);
1533         if (identify->device_type == SAS_END_DEVICE &&
1534             (identify->target_port_protocols &
1535              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1536                 rphy->scsi_target_id = sas_host->next_target_id++;
1537         else if (identify->device_type == SAS_END_DEVICE)
1538                 rphy->scsi_target_id = -1;
1539         mutex_unlock(&sas_host->lock);
1540
1541         if (identify->device_type == SAS_END_DEVICE &&
1542             rphy->scsi_target_id != -1) {
1543                 int lun;
1544
1545                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1546                         lun = SCAN_WILD_CARD;
1547                 else
1548                         lun = 0;
1549
1550                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1551                                  SCSI_SCAN_INITIAL);
1552         }
1553
1554         return 0;
1555 }
1556 EXPORT_SYMBOL(sas_rphy_add);
1557
1558 /**
1559  * sas_rphy_free  -  free a SAS remote PHY
1560  * @rphy: SAS remote PHY to free
1561  *
1562  * Frees the specified SAS remote PHY.
1563  *
1564  * Note:
1565  *   This function must only be called on a remote
1566  *   PHY that has not successfully been added using
1567  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1568  */
1569 void sas_rphy_free(struct sas_rphy *rphy)
1570 {
1571         struct device *dev = &rphy->dev;
1572         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1573         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1574
1575         mutex_lock(&sas_host->lock);
1576         list_del(&rphy->list);
1577         mutex_unlock(&sas_host->lock);
1578
1579         transport_destroy_device(dev);
1580
1581         put_device(dev);
1582 }
1583 EXPORT_SYMBOL(sas_rphy_free);
1584
1585 /**
1586  * sas_rphy_delete  -  remove and free SAS remote PHY
1587  * @rphy:       SAS remote PHY to remove and free
1588  *
1589  * Removes the specified SAS remote PHY and frees it.
1590  */
1591 void
1592 sas_rphy_delete(struct sas_rphy *rphy)
1593 {
1594         sas_rphy_remove(rphy);
1595         sas_rphy_free(rphy);
1596 }
1597 EXPORT_SYMBOL(sas_rphy_delete);
1598
1599 /**
1600  * sas_rphy_unlink  -  unlink SAS remote PHY
1601  * @rphy:       SAS remote phy to unlink from its parent port
1602  *
1603  * Removes port reference to an rphy
1604  */
1605 void sas_rphy_unlink(struct sas_rphy *rphy)
1606 {
1607         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1608
1609         parent->rphy = NULL;
1610 }
1611 EXPORT_SYMBOL(sas_rphy_unlink);
1612
1613 /**
1614  * sas_rphy_remove  -  remove SAS remote PHY
1615  * @rphy:       SAS remote phy to remove
1616  *
1617  * Removes the specified SAS remote PHY.
1618  */
1619 void
1620 sas_rphy_remove(struct sas_rphy *rphy)
1621 {
1622         struct device *dev = &rphy->dev;
1623
1624         switch (rphy->identify.device_type) {
1625         case SAS_END_DEVICE:
1626                 scsi_remove_target(dev);
1627                 break;
1628         case SAS_EDGE_EXPANDER_DEVICE:
1629         case SAS_FANOUT_EXPANDER_DEVICE:
1630                 sas_remove_children(dev);
1631                 break;
1632         default:
1633                 break;
1634         }
1635
1636         sas_rphy_unlink(rphy);
1637         if (rphy->q)
1638                 bsg_unregister_queue(rphy->q);
1639         transport_remove_device(dev);
1640         device_del(dev);
1641 }
1642 EXPORT_SYMBOL(sas_rphy_remove);
1643
1644 /**
1645  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1646  * @dev:        device to check
1647  *
1648  * Returns:
1649  *      %1 if the device represents a SAS remote PHY, %0 else
1650  */
1651 int scsi_is_sas_rphy(const struct device *dev)
1652 {
1653         return dev->release == sas_end_device_release ||
1654                 dev->release == sas_expander_release;
1655 }
1656 EXPORT_SYMBOL(scsi_is_sas_rphy);
1657
1658
1659 /*
1660  * SCSI scan helper
1661  */
1662
1663 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1664                 uint id, u64 lun)
1665 {
1666         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1667         struct sas_rphy *rphy;
1668
1669         mutex_lock(&sas_host->lock);
1670         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1671                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1672                     rphy->scsi_target_id == -1)
1673                         continue;
1674
1675                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1676                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1677                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1678                                          lun, SCSI_SCAN_MANUAL);
1679                 }
1680         }
1681         mutex_unlock(&sas_host->lock);
1682
1683         return 0;
1684 }
1685
1686
1687 /*
1688  * Setup / Teardown code
1689  */
1690
1691 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1692         i->private_##attrb[count] = dev_attr_##field;           \
1693         i->private_##attrb[count].attr.mode = perm;                     \
1694         i->attrb[count] = &i->private_##attrb[count];                   \
1695         if (test)                                                       \
1696                 count++
1697
1698 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1699         i->private_##attrb[count] = dev_attr_##field;           \
1700         i->private_##attrb[count].attr.mode = perm;                     \
1701         if (ro_test) {                                                  \
1702                 i->private_##attrb[count].attr.mode = ro_perm;          \
1703                 i->private_##attrb[count].store = NULL;                 \
1704         }                                                               \
1705         i->attrb[count] = &i->private_##attrb[count];                   \
1706         if (test)                                                       \
1707                 count++
1708
1709 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1710         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1711
1712 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1713         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1714
1715 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1716         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1717
1718 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1719         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1720                         !i->f->set_phy_speed, S_IRUGO)
1721
1722 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1723         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1724                           !i->f->func, S_IRUGO)
1725
1726 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1727         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1728
1729 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1730         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1731
1732 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1733         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1734
1735 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1736         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1737
1738 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1739         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1740
1741 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1742         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1743
1744 /**
1745  * sas_attach_transport  -  instantiate SAS transport template
1746  * @ft:         SAS transport class function template
1747  */
1748 struct scsi_transport_template *
1749 sas_attach_transport(struct sas_function_template *ft)
1750 {
1751         struct sas_internal *i;
1752         int count;
1753
1754         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1755         if (!i)
1756                 return NULL;
1757
1758         i->t.user_scan = sas_user_scan;
1759
1760         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1761         i->t.host_attrs.ac.class = &sas_host_class.class;
1762         i->t.host_attrs.ac.match = sas_host_match;
1763         transport_container_register(&i->t.host_attrs);
1764         i->t.host_size = sizeof(struct sas_host_attrs);
1765
1766         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1767         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1768         i->phy_attr_cont.ac.match = sas_phy_match;
1769         transport_container_register(&i->phy_attr_cont);
1770
1771         i->port_attr_cont.ac.class = &sas_port_class.class;
1772         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1773         i->port_attr_cont.ac.match = sas_port_match;
1774         transport_container_register(&i->port_attr_cont);
1775
1776         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1777         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1778         i->rphy_attr_cont.ac.match = sas_rphy_match;
1779         transport_container_register(&i->rphy_attr_cont);
1780
1781         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1782         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1783         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1784         transport_container_register(&i->end_dev_attr_cont);
1785
1786         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1787         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1788         i->expander_attr_cont.ac.match = sas_expander_match;
1789         transport_container_register(&i->expander_attr_cont);
1790
1791         i->f = ft;
1792
1793         count = 0;
1794         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1795         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1796         SETUP_PHY_ATTRIBUTE(device_type);
1797         SETUP_PHY_ATTRIBUTE(sas_address);
1798         SETUP_PHY_ATTRIBUTE(phy_identifier);
1799         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1800         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1801         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1802         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1803         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1804
1805         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1806         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1807         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1808         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1809         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1810         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1811         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1812         i->phy_attrs[count] = NULL;
1813
1814         count = 0;
1815         SETUP_PORT_ATTRIBUTE(num_phys);
1816         i->port_attrs[count] = NULL;
1817
1818         count = 0;
1819         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1820         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1821         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1822         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1823         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1824         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1825         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1826                                        get_enclosure_identifier);
1827         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1828                                        get_bay_identifier);
1829         i->rphy_attrs[count] = NULL;
1830
1831         count = 0;
1832         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1833         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1834         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1835         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1836         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1837         i->end_dev_attrs[count] = NULL;
1838
1839         count = 0;
1840         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1841         SETUP_EXPANDER_ATTRIBUTE(product_id);
1842         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1843         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1844         SETUP_EXPANDER_ATTRIBUTE(component_id);
1845         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1846         SETUP_EXPANDER_ATTRIBUTE(level);
1847         i->expander_attrs[count] = NULL;
1848
1849         return &i->t;
1850 }
1851 EXPORT_SYMBOL(sas_attach_transport);
1852
1853 /**
1854  * sas_release_transport  -  release SAS transport template instance
1855  * @t:          transport template instance
1856  */
1857 void sas_release_transport(struct scsi_transport_template *t)
1858 {
1859         struct sas_internal *i = to_sas_internal(t);
1860
1861         transport_container_unregister(&i->t.host_attrs);
1862         transport_container_unregister(&i->phy_attr_cont);
1863         transport_container_unregister(&i->port_attr_cont);
1864         transport_container_unregister(&i->rphy_attr_cont);
1865         transport_container_unregister(&i->end_dev_attr_cont);
1866         transport_container_unregister(&i->expander_attr_cont);
1867
1868         kfree(i);
1869 }
1870 EXPORT_SYMBOL(sas_release_transport);
1871
1872 static __init int sas_transport_init(void)
1873 {
1874         int error;
1875
1876         error = transport_class_register(&sas_host_class);
1877         if (error)
1878                 goto out;
1879         error = transport_class_register(&sas_phy_class);
1880         if (error)
1881                 goto out_unregister_transport;
1882         error = transport_class_register(&sas_port_class);
1883         if (error)
1884                 goto out_unregister_phy;
1885         error = transport_class_register(&sas_rphy_class);
1886         if (error)
1887                 goto out_unregister_port;
1888         error = transport_class_register(&sas_end_dev_class);
1889         if (error)
1890                 goto out_unregister_rphy;
1891         error = transport_class_register(&sas_expander_class);
1892         if (error)
1893                 goto out_unregister_end_dev;
1894
1895         return 0;
1896
1897  out_unregister_end_dev:
1898         transport_class_unregister(&sas_end_dev_class);
1899  out_unregister_rphy:
1900         transport_class_unregister(&sas_rphy_class);
1901  out_unregister_port:
1902         transport_class_unregister(&sas_port_class);
1903  out_unregister_phy:
1904         transport_class_unregister(&sas_phy_class);
1905  out_unregister_transport:
1906         transport_class_unregister(&sas_host_class);
1907  out:
1908         return error;
1909
1910 }
1911
1912 static void __exit sas_transport_exit(void)
1913 {
1914         transport_class_unregister(&sas_host_class);
1915         transport_class_unregister(&sas_phy_class);
1916         transport_class_unregister(&sas_port_class);
1917         transport_class_unregister(&sas_rphy_class);
1918         transport_class_unregister(&sas_end_dev_class);
1919         transport_class_unregister(&sas_expander_class);
1920 }
1921
1922 MODULE_AUTHOR("Christoph Hellwig");
1923 MODULE_DESCRIPTION("SAS Transport Attributes");
1924 MODULE_LICENSE("GPL");
1925
1926 module_init(sas_transport_init);
1927 module_exit(sas_transport_exit);