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_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 void sas_host_release(struct device *dev)
 191 {
 192         struct Scsi_Host *shost = dev_to_shost(dev);
 193         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 194         struct request_queue *q = sas_host->q;
 195
 196         if (q)
 197                 blk_cleanup_queue(q);
 198 }
 199
 200 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 201 {
 202         struct request_queue *q;
 203
 204         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 205                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 206                 return 0;
 207         }
 208
 209         if (rphy) {
 210                 q = bsg_setup_queue(&rphy->dev, dev_name(&rphy->dev),
 211                                 sas_smp_dispatch, 0, NULL);
 212                 if (IS_ERR(q))
 213                         return PTR_ERR(q);
 214                 rphy->q = q;
 215         } else {
 216                 char name[20];
 217
 218                 snprintf(name, sizeof(name), "sas_host%d", shost->host_no);
 219                 q = bsg_setup_queue(&shost->shost_gendev, name,
 220                                 sas_smp_dispatch, 0, sas_host_release);
 221                 if (IS_ERR(q))
 222                         return PTR_ERR(q);
 223                 to_sas_host_attrs(shost)->q = q;
 224         }
 225
 226         /*
 227          * by default assume old behaviour and bounce for any highmem page
 228          */
 229         blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH);
 230         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
 231         queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
 232         return 0;
 233 }
 234
 235 /*
 236  * SAS host attributes
 237  */
 238
 239 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 240                           struct device *cdev)
 241 {
 242         struct Scsi_Host *shost = dev_to_shost(dev);
 243         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 244
 245         INIT_LIST_HEAD(&sas_host->rphy_list);
 246         mutex_init(&sas_host->lock);
 247         sas_host->next_target_id = 0;
 248         sas_host->next_expander_id = 0;
 249         sas_host->next_port_id = 0;
 250
 251         if (sas_bsg_initialize(shost, NULL))
 252                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 253                            shost->host_no);
 254
 255         return 0;
 256 }
 257
 258 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 259                            struct device *cdev)
 260 {
 261         struct Scsi_Host *shost = dev_to_shost(dev);
 262         struct request_queue *q = to_sas_host_attrs(shost)->q;
 263
 264         if (q)
 265                 bsg_unregister_queue(q);
 266         return 0;
 267 }
 268
 269 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 270                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 271
 272 static int sas_host_match(struct attribute_container *cont,
 273                             struct device *dev)
 274 {
 275         struct Scsi_Host *shost;
 276         struct sas_internal *i;
 277
 278         if (!scsi_is_host_device(dev))
 279                 return 0;
 280         shost = dev_to_shost(dev);
 281
 282         if (!shost->transportt)
 283                 return 0;
 284         if (shost->transportt->host_attrs.ac.class !=
 285                         &sas_host_class.class)
 286                 return 0;
 287
 288         i = to_sas_internal(shost->transportt);
 289         return &i->t.host_attrs.ac == cont;
 290 }
 291
 292 static int do_sas_phy_delete(struct device *dev, void *data)
 293 {
 294         int pass = (int)(unsigned long)data;
 295
 296         if (pass == 0 && scsi_is_sas_port(dev))
 297                 sas_port_delete(dev_to_sas_port(dev));
 298         else if (pass == 1 && scsi_is_sas_phy(dev))
 299                 sas_phy_delete(dev_to_phy(dev));
 300         return 0;
 301 }
 302
 303 /**
 304  * sas_remove_children  -  tear down a devices SAS data structures
 305  * @dev:        device belonging to the sas object
 306  *
 307  * Removes all SAS PHYs and remote PHYs for a given object
 308  */
 309 void sas_remove_children(struct device *dev)
 310 {
 311         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 312         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 313 }
 314 EXPORT_SYMBOL(sas_remove_children);
 315
 316 /**
 317  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 318  * @shost:      Scsi Host that is torn down
 319  *
 320  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
 321  * Scsi_Host as well.
 322  *
 323  * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
 324  * already removed.
 325  */
 326 void sas_remove_host(struct Scsi_Host *shost)
 327 {
 328         sas_remove_children(&shost->shost_gendev);
 329         scsi_remove_host(shost);
 330 }
 331 EXPORT_SYMBOL(sas_remove_host);
 332
 333 /**
 334  * sas_get_address - return the SAS address of the device
 335  * @sdev: scsi device
 336  *
 337  * Returns the SAS address of the scsi device
 338  */
 339 u64 sas_get_address(struct scsi_device *sdev)
 340 {
 341         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 342
 343         return rdev->rphy.identify.sas_address;
 344 }
 345 EXPORT_SYMBOL(sas_get_address);
 346
 347 /**
 348  * sas_tlr_supported - checking TLR bit in vpd 0x90
 349  * @sdev: scsi device struct
 350  *
 351  * Check Transport Layer Retries are supported or not.
 352  * If vpd page 0x90 is present, TRL is supported.
 353  *
 354  */
 355 unsigned int
 356 sas_tlr_supported(struct scsi_device *sdev)
 357 {
 358         const int vpd_len = 32;
 359         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 360         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 361         int ret = 0;
 362
 363         if (!buffer)
 364                 goto out;
 365
 366         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 367                 goto out;
 368
 369         /*
 370          * Magic numbers: the VPD Protocol page (0x90)
 371          * has a 4 byte header and then one entry per device port
 372          * the TLR bit is at offset 8 on each port entry
 373          * if we take the first port, that's at total offset 12
 374          */
 375         ret = buffer[12] & 0x01;
 376
 377  out:
 378         kfree(buffer);
 379         rdev->tlr_supported = ret;
 380         return ret;
 381
 382 }
 383 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 384
 385 /**
 386  * sas_disable_tlr - setting TLR flags
 387  * @sdev: scsi device struct
 388  *
 389  * Seting tlr_enabled flag to 0.
 390  *
 391  */
 392 void
 393 sas_disable_tlr(struct scsi_device *sdev)
 394 {
 395         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 396
 397         rdev->tlr_enabled = 0;
 398 }
 399 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 400
 401 /**
 402  * sas_enable_tlr - setting TLR flags
 403  * @sdev: scsi device struct
 404  *
 405  * Seting tlr_enabled flag 1.
 406  *
 407  */
 408 void sas_enable_tlr(struct scsi_device *sdev)
 409 {
 410         unsigned int tlr_supported = 0;
 411         tlr_supported  = sas_tlr_supported(sdev);
 412
 413         if (tlr_supported) {
 414                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 415
 416                 rdev->tlr_enabled = 1;
 417         }
 418
 419         return;
 420 }
 421 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 422
 423 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 424 {
 425         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 426         return rdev->tlr_enabled;
 427 }
 428 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 429
 430 /*
 431  * SAS Phy attributes
 432  */
 433
 434 #define sas_phy_show_simple(field, name, format_string, cast)           \
 435 static ssize_t                                                          \
 436 show_sas_phy_##name(struct device *dev,                                 \
 437                     struct device_attribute *attr, char *buf)           \
 438 {                                                                       \
 439         struct sas_phy *phy = transport_class_to_phy(dev);              \
 440                                                                         \
 441         return snprintf(buf, 20, format_string, cast phy->field);       \
 442 }
 443
 444 #define sas_phy_simple_attr(field, name, format_string, type)           \
 445         sas_phy_show_simple(field, name, format_string, (type)) \
 446 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 447
 448 #define sas_phy_show_protocol(field, name)                              \
 449 static ssize_t                                                          \
 450 show_sas_phy_##name(struct device *dev,                                 \
 451                     struct device_attribute *attr, char *buf)           \
 452 {                                                                       \
 453         struct sas_phy *phy = transport_class_to_phy(dev);              \
 454                                                                         \
 455         if (!phy->field)                                                \
 456                 return snprintf(buf, 20, "none\n");                     \
 457         return get_sas_protocol_names(phy->field, buf);         \
 458 }
 459
 460 #define sas_phy_protocol_attr(field, name)                              \
 461         sas_phy_show_protocol(field, name)                              \
 462 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 463
 464 #define sas_phy_show_linkspeed(field)                                   \
 465 static ssize_t                                                          \
 466 show_sas_phy_##field(struct device *dev,                                \
 467                      struct device_attribute *attr, char *buf)          \
 468 {                                                                       \
 469         struct sas_phy *phy = transport_class_to_phy(dev);              \
 470                                                                         \
 471         return get_sas_linkspeed_names(phy->field, buf);                \
 472 }
 473
 474 /* Fudge to tell if we're minimum or maximum */
 475 #define sas_phy_store_linkspeed(field)                                  \
 476 static ssize_t                                                          \
 477 store_sas_phy_##field(struct device *dev,                               \
 478                       struct device_attribute *attr,                    \
 479                       const char *buf,  size_t count)                   \
 480 {                                                                       \
 481         struct sas_phy *phy = transport_class_to_phy(dev);              \
 482         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 483         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 484         u32 value;                                                      \
 485         struct sas_phy_linkrates rates = {0};                           \
 486         int error;                                                      \
 487                                                                         \
 488         error = set_sas_linkspeed_names(&value, buf);                   \
 489         if (error)                                                      \
 490                 return error;                                           \
 491         rates.field = value;                                            \
 492         error = i->f->set_phy_speed(phy, &rates);                       \
 493                                                                         \
 494         return error ? error : count;                                   \
 495 }
 496
 497 #define sas_phy_linkspeed_rw_attr(field)                                \
 498         sas_phy_show_linkspeed(field)                                   \
 499         sas_phy_store_linkspeed(field)                                  \
 500 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 501         store_sas_phy_##field)
 502
 503 #define sas_phy_linkspeed_attr(field)                                   \
 504         sas_phy_show_linkspeed(field)                                   \
 505 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 506
 507
 508 #define sas_phy_show_linkerror(field)                                   \
 509 static ssize_t                                                          \
 510 show_sas_phy_##field(struct device *dev,                                \
 511                      struct device_attribute *attr, char *buf)          \
 512 {                                                                       \
 513         struct sas_phy *phy = transport_class_to_phy(dev);              \
 514         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 515         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 516         int error;                                                      \
 517                                                                         \
 518         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 519         if (error)                                                      \
 520                 return error;                                           \
 521         return snprintf(buf, 20, "%u\n", phy->field);                   \
 522 }
 523
 524 #define sas_phy_linkerror_attr(field)                                   \
 525         sas_phy_show_linkerror(field)                                   \
 526 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 527
 528
 529 static ssize_t
 530 show_sas_device_type(struct device *dev,
 531                      struct device_attribute *attr, char *buf)
 532 {
 533         struct sas_phy *phy = transport_class_to_phy(dev);
 534
 535         if (!phy->identify.device_type)
 536                 return snprintf(buf, 20, "none\n");
 537         return get_sas_device_type_names(phy->identify.device_type, buf);
 538 }
 539 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 540
 541 static ssize_t do_sas_phy_enable(struct device *dev,
 542                 size_t count, int enable)
 543 {
 544         struct sas_phy *phy = transport_class_to_phy(dev);
 545         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 546         struct sas_internal *i = to_sas_internal(shost->transportt);
 547         int error;
 548
 549         error = i->f->phy_enable(phy, enable);
 550         if (error)
 551                 return error;
 552         phy->enabled = enable;
 553         return count;
 554 };
 555
 556 static ssize_t
 557 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 558                      const char *buf, size_t count)
 559 {
 560         if (count < 1)
 561                 return -EINVAL;
 562
 563         switch (buf[0]) {
 564         case '0':
 565                 do_sas_phy_enable(dev, count, 0);
 566                 break;
 567         case '1':
 568                 do_sas_phy_enable(dev, count, 1);
 569                 break;
 570         default:
 571                 return -EINVAL;
 572         }
 573
 574         return count;
 575 }
 576
 577 static ssize_t
 578 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 579                     char *buf)
 580 {
 581         struct sas_phy *phy = transport_class_to_phy(dev);
 582
 583         return snprintf(buf, 20, "%d", phy->enabled);
 584 }
 585
 586 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 587                          store_sas_phy_enable);
 588
 589 static ssize_t
 590 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 591 {
 592         struct sas_phy *phy = transport_class_to_phy(dev);
 593         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 594         struct sas_internal *i = to_sas_internal(shost->transportt);
 595         int error;
 596
 597         error = i->f->phy_reset(phy, hard_reset);
 598         if (error)
 599                 return error;
 600         phy->enabled = 1;
 601         return count;
 602 };
 603
 604 static ssize_t
 605 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 606                      const char *buf, size_t count)
 607 {
 608         return do_sas_phy_reset(dev, count, 0);
 609 }
 610 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 611
 612 static ssize_t
 613 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 614                      const char *buf, size_t count)
 615 {
 616         return do_sas_phy_reset(dev, count, 1);
 617 }
 618 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 619
 620 sas_phy_protocol_attr(identify.initiator_port_protocols,
 621                 initiator_port_protocols);
 622 sas_phy_protocol_attr(identify.target_port_protocols,
 623                 target_port_protocols);
 624 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 625                 unsigned long long);
 626 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 627 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 628 sas_phy_linkspeed_attr(negotiated_linkrate);
 629 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 630 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 631 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 632 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 633 sas_phy_linkerror_attr(invalid_dword_count);
 634 sas_phy_linkerror_attr(running_disparity_error_count);
 635 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 636 sas_phy_linkerror_attr(phy_reset_problem_count);
 637
 638 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 639                          struct device *cdev)
 640 {
 641         struct sas_phy *phy = dev_to_phy(dev);
 642         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 643         struct sas_internal *i = to_sas_internal(shost->transportt);
 644
 645         if (i->f->phy_setup)
 646                 i->f->phy_setup(phy);
 647
 648         return 0;
 649 }
 650
 651 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 652                 "sas_phy", sas_phy_setup, NULL, NULL);
 653
 654 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 655 {
 656         struct Scsi_Host *shost;
 657         struct sas_internal *i;
 658
 659         if (!scsi_is_sas_phy(dev))
 660                 return 0;
 661         shost = dev_to_shost(dev->parent);
 662
 663         if (!shost->transportt)
 664                 return 0;
 665         if (shost->transportt->host_attrs.ac.class !=
 666                         &sas_host_class.class)
 667                 return 0;
 668
 669         i = to_sas_internal(shost->transportt);
 670         return &i->phy_attr_cont.ac == cont;
 671 }
 672
 673 static void sas_phy_release(struct device *dev)
 674 {
 675         struct sas_phy *phy = dev_to_phy(dev);
 676         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 677         struct sas_internal *i = to_sas_internal(shost->transportt);
 678
 679         if (i->f->phy_release)
 680                 i->f->phy_release(phy);
 681         put_device(dev->parent);
 682         kfree(phy);
 683 }
 684
 685 /**
 686  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 687  * @parent:     Parent device
 688  * @number:     Phy index
 689  *
 690  * Allocates an SAS PHY structure.  It will be added in the device tree
 691  * below the device specified by @parent, which has to be either a Scsi_Host
 692  * or sas_rphy.
 693  *
 694  * Returns:
 695  *      SAS PHY allocated or %NULL if the allocation failed.
 696  */
 697 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 698 {
 699         struct Scsi_Host *shost = dev_to_shost(parent);
 700         struct sas_phy *phy;
 701
 702         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 703         if (!phy)
 704                 return NULL;
 705
 706         phy->number = number;
 707         phy->enabled = 1;
 708
 709         device_initialize(&phy->dev);
 710         phy->dev.parent = get_device(parent);
 711         phy->dev.release = sas_phy_release;
 712         INIT_LIST_HEAD(&phy->port_siblings);
 713         if (scsi_is_sas_expander_device(parent)) {
 714                 struct sas_rphy *rphy = dev_to_rphy(parent);
 715                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 716                         rphy->scsi_target_id, number);
 717         } else
 718                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 719
 720         transport_setup_device(&phy->dev);
 721
 722         return phy;
 723 }
 724 EXPORT_SYMBOL(sas_phy_alloc);
 725
 726 /**
 727  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 728  * @phy:        The PHY to be added
 729  *
 730  * Publishes a SAS PHY to the rest of the system.
 731  */
 732 int sas_phy_add(struct sas_phy *phy)
 733 {
 734         int error;
 735
 736         error = device_add(&phy->dev);
 737         if (!error) {
 738                 transport_add_device(&phy->dev);
 739                 transport_configure_device(&phy->dev);
 740         }
 741
 742         return error;
 743 }
 744 EXPORT_SYMBOL(sas_phy_add);
 745
 746 /**
 747  * sas_phy_free  -  free a SAS PHY
 748  * @phy:        SAS PHY to free
 749  *
 750  * Frees the specified SAS PHY.
 751  *
 752  * Note:
 753  *   This function must only be called on a PHY that has not
 754  *   successfully been added using sas_phy_add().
 755  */
 756 void sas_phy_free(struct sas_phy *phy)
 757 {
 758         transport_destroy_device(&phy->dev);
 759         put_device(&phy->dev);
 760 }
 761 EXPORT_SYMBOL(sas_phy_free);
 762
 763 /**
 764  * sas_phy_delete  -  remove SAS PHY
 765  * @phy:        SAS PHY to remove
 766  *
 767  * Removes the specified SAS PHY.  If the SAS PHY has an
 768  * associated remote PHY it is removed before.
 769  */
 770 void
 771 sas_phy_delete(struct sas_phy *phy)
 772 {
 773         struct device *dev = &phy->dev;
 774
 775         /* this happens if the phy is still part of a port when deleted */
 776         BUG_ON(!list_empty(&phy->port_siblings));
 777
 778         transport_remove_device(dev);
 779         device_del(dev);
 780         transport_destroy_device(dev);
 781         put_device(dev);
 782 }
 783 EXPORT_SYMBOL(sas_phy_delete);
 784
 785 /**
 786  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 787  * @dev:        device to check
 788  *
 789  * Returns:
 790  *      %1 if the device represents a SAS PHY, %0 else
 791  */
 792 int scsi_is_sas_phy(const struct device *dev)
 793 {
 794         return dev->release == sas_phy_release;
 795 }
 796 EXPORT_SYMBOL(scsi_is_sas_phy);
 797
 798 /*
 799  * SAS Port attributes
 800  */
 801 #define sas_port_show_simple(field, name, format_string, cast)          \
 802 static ssize_t                                                          \
 803 show_sas_port_##name(struct device *dev,                                \
 804                      struct device_attribute *attr, char *buf)          \
 805 {                                                                       \
 806         struct sas_port *port = transport_class_to_sas_port(dev);       \
 807                                                                         \
 808         return snprintf(buf, 20, format_string, cast port->field);      \
 809 }
 810
 811 #define sas_port_simple_attr(field, name, format_string, type)          \
 812         sas_port_show_simple(field, name, format_string, (type))        \
 813 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 814
 815 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 816
 817 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 818                                "sas_port", NULL, NULL, NULL);
 819
 820 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 821 {
 822         struct Scsi_Host *shost;
 823         struct sas_internal *i;
 824
 825         if (!scsi_is_sas_port(dev))
 826                 return 0;
 827         shost = dev_to_shost(dev->parent);
 828
 829         if (!shost->transportt)
 830                 return 0;
 831         if (shost->transportt->host_attrs.ac.class !=
 832                         &sas_host_class.class)
 833                 return 0;
 834
 835         i = to_sas_internal(shost->transportt);
 836         return &i->port_attr_cont.ac == cont;
 837 }
 838
 839
 840 static void sas_port_release(struct device *dev)
 841 {
 842         struct sas_port *port = dev_to_sas_port(dev);
 843
 844         BUG_ON(!list_empty(&port->phy_list));
 845
 846         put_device(dev->parent);
 847         kfree(port);
 848 }
 849
 850 static void sas_port_create_link(struct sas_port *port,
 851                                  struct sas_phy *phy)
 852 {
 853         int res;
 854
 855         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 856                                 dev_name(&phy->dev));
 857         if (res)
 858                 goto err;
 859         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 860         if (res)
 861                 goto err;
 862         return;
 863 err:
 864         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 865                __func__, res);
 866 }
 867
 868 static void sas_port_delete_link(struct sas_port *port,
 869                                  struct sas_phy *phy)
 870 {
 871         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 872         sysfs_remove_link(&phy->dev.kobj, "port");
 873 }
 874
 875 /** sas_port_alloc - allocate and initialize a SAS port structure
 876  *
 877  * @parent:     parent device
 878  * @port_id:    port number
 879  *
 880  * Allocates a SAS port structure.  It will be added to the device tree
 881  * below the device specified by @parent which must be either a Scsi_Host
 882  * or a sas_expander_device.
 883  *
 884  * Returns %NULL on error
 885  */
 886 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 887 {
 888         struct Scsi_Host *shost = dev_to_shost(parent);
 889         struct sas_port *port;
 890
 891         port = kzalloc(sizeof(*port), GFP_KERNEL);
 892         if (!port)
 893                 return NULL;
 894
 895         port->port_identifier = port_id;
 896
 897         device_initialize(&port->dev);
 898
 899         port->dev.parent = get_device(parent);
 900         port->dev.release = sas_port_release;
 901
 902         mutex_init(&port->phy_list_mutex);
 903         INIT_LIST_HEAD(&port->phy_list);
 904
 905         if (scsi_is_sas_expander_device(parent)) {
 906                 struct sas_rphy *rphy = dev_to_rphy(parent);
 907                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 908                              rphy->scsi_target_id, port->port_identifier);
 909         } else
 910                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 911                              port->port_identifier);
 912
 913         transport_setup_device(&port->dev);
 914
 915         return port;
 916 }
 917 EXPORT_SYMBOL(sas_port_alloc);
 918
 919 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 920  *
 921  * @parent:     parent device
 922  *
 923  * Allocates a SAS port structure and a number to go with it.  This
 924  * interface is really for adapters where the port number has no
 925  * meansing, so the sas class should manage them.  It will be added to
 926  * the device tree below the device specified by @parent which must be
 927  * either a Scsi_Host or a sas_expander_device.
 928  *
 929  * Returns %NULL on error
 930  */
 931 struct sas_port *sas_port_alloc_num(struct device *parent)
 932 {
 933         int index;
 934         struct Scsi_Host *shost = dev_to_shost(parent);
 935         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 936
 937         /* FIXME: use idr for this eventually */
 938         mutex_lock(&sas_host->lock);
 939         if (scsi_is_sas_expander_device(parent)) {
 940                 struct sas_rphy *rphy = dev_to_rphy(parent);
 941                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 942
 943                 index = exp->next_port_id++;
 944         } else
 945                 index = sas_host->next_port_id++;
 946         mutex_unlock(&sas_host->lock);
 947         return sas_port_alloc(parent, index);
 948 }
 949 EXPORT_SYMBOL(sas_port_alloc_num);
 950
 951 /**
 952  * sas_port_add - add a SAS port to the device hierarchy
 953  * @port:       port to be added
 954  *
 955  * publishes a port to the rest of the system
 956  */
 957 int sas_port_add(struct sas_port *port)
 958 {
 959         int error;
 960
 961         /* No phys should be added until this is made visible */
 962         BUG_ON(!list_empty(&port->phy_list));
 963
 964         error = device_add(&port->dev);
 965
 966         if (error)
 967                 return error;
 968
 969         transport_add_device(&port->dev);
 970         transport_configure_device(&port->dev);
 971
 972         return 0;
 973 }
 974 EXPORT_SYMBOL(sas_port_add);
 975
 976 /**
 977  * sas_port_free  -  free a SAS PORT
 978  * @port:       SAS PORT to free
 979  *
 980  * Frees the specified SAS PORT.
 981  *
 982  * Note:
 983  *   This function must only be called on a PORT that has not
 984  *   successfully been added using sas_port_add().
 985  */
 986 void sas_port_free(struct sas_port *port)
 987 {
 988         transport_destroy_device(&port->dev);
 989         put_device(&port->dev);
 990 }
 991 EXPORT_SYMBOL(sas_port_free);
 992
 993 /**
 994  * sas_port_delete  -  remove SAS PORT
 995  * @port:       SAS PORT to remove
 996  *
 997  * Removes the specified SAS PORT.  If the SAS PORT has an
 998  * associated phys, unlink them from the port as well.
 999  */
1000 void sas_port_delete(struct sas_port *port)
1001 {
1002         struct device *dev = &port->dev;
1003         struct sas_phy *phy, *tmp_phy;
1004
1005         if (port->rphy) {
1006                 sas_rphy_delete(port->rphy);
1007                 port->rphy = NULL;
1008         }
1009
1010         mutex_lock(&port->phy_list_mutex);
1011         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1012                                  port_siblings) {
1013                 sas_port_delete_link(port, phy);
1014                 list_del_init(&phy->port_siblings);
1015         }
1016         mutex_unlock(&port->phy_list_mutex);
1017
1018         if (port->is_backlink) {
1019                 struct device *parent = port->dev.parent;
1020
1021                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1022                 port->is_backlink = 0;
1023         }
1024
1025         transport_remove_device(dev);
1026         device_del(dev);
1027         transport_destroy_device(dev);
1028         put_device(dev);
1029 }
1030 EXPORT_SYMBOL(sas_port_delete);
1031
1032 /**
1033  * scsi_is_sas_port -  check if a struct device represents a SAS port
1034  * @dev:        device to check
1035  *
1036  * Returns:
1037  *      %1 if the device represents a SAS Port, %0 else
1038  */
1039 int scsi_is_sas_port(const struct device *dev)
1040 {
1041         return dev->release == sas_port_release;
1042 }
1043 EXPORT_SYMBOL(scsi_is_sas_port);
1044
1045 /**
1046  * sas_port_get_phy - try to take a reference on a port member
1047  * @port: port to check
1048  */
1049 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1050 {
1051         struct sas_phy *phy;
1052
1053         mutex_lock(&port->phy_list_mutex);
1054         if (list_empty(&port->phy_list))
1055                 phy = NULL;
1056         else {
1057                 struct list_head *ent = port->phy_list.next;
1058
1059                 phy = list_entry(ent, typeof(*phy), port_siblings);
1060                 get_device(&phy->dev);
1061         }
1062         mutex_unlock(&port->phy_list_mutex);
1063
1064         return phy;
1065 }
1066 EXPORT_SYMBOL(sas_port_get_phy);
1067
1068 /**
1069  * sas_port_add_phy - add another phy to a port to form a wide port
1070  * @port:       port to add the phy to
1071  * @phy:        phy to add
1072  *
1073  * When a port is initially created, it is empty (has no phys).  All
1074  * ports must have at least one phy to operated, and all wide ports
1075  * must have at least two.  The current code makes no difference
1076  * between ports and wide ports, but the only object that can be
1077  * connected to a remote device is a port, so ports must be formed on
1078  * all devices with phys if they're connected to anything.
1079  */
1080 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1081 {
1082         mutex_lock(&port->phy_list_mutex);
1083         if (unlikely(!list_empty(&phy->port_siblings))) {
1084                 /* make sure we're already on this port */
1085                 struct sas_phy *tmp;
1086
1087                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1088                         if (tmp == phy)
1089                                 break;
1090                 /* If this trips, you added a phy that was already
1091                  * part of a different port */
1092                 if (unlikely(tmp != phy)) {
1093                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1094                                    dev_name(&phy->dev));
1095                         BUG();
1096                 }
1097         } else {
1098                 sas_port_create_link(port, phy);
1099                 list_add_tail(&phy->port_siblings, &port->phy_list);
1100                 port->num_phys++;
1101         }
1102         mutex_unlock(&port->phy_list_mutex);
1103 }
1104 EXPORT_SYMBOL(sas_port_add_phy);
1105
1106 /**
1107  * sas_port_delete_phy - remove a phy from a port or wide port
1108  * @port:       port to remove the phy from
1109  * @phy:        phy to remove
1110  *
1111  * This operation is used for tearing down ports again.  It must be
1112  * done to every port or wide port before calling sas_port_delete.
1113  */
1114 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1115 {
1116         mutex_lock(&port->phy_list_mutex);
1117         sas_port_delete_link(port, phy);
1118         list_del_init(&phy->port_siblings);
1119         port->num_phys--;
1120         mutex_unlock(&port->phy_list_mutex);
1121 }
1122 EXPORT_SYMBOL(sas_port_delete_phy);
1123
1124 void sas_port_mark_backlink(struct sas_port *port)
1125 {
1126         int res;
1127         struct device *parent = port->dev.parent->parent->parent;
1128
1129         if (port->is_backlink)
1130                 return;
1131         port->is_backlink = 1;
1132         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1133                                 dev_name(parent));
1134         if (res)
1135                 goto err;
1136         return;
1137 err:
1138         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1139                __func__, res);
1140
1141 }
1142 EXPORT_SYMBOL(sas_port_mark_backlink);
1143
1144 /*
1145  * SAS remote PHY attributes.
1146  */
1147
1148 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1149 static ssize_t                                                          \
1150 show_sas_rphy_##name(struct device *dev,                                \
1151                      struct device_attribute *attr, char *buf)          \
1152 {                                                                       \
1153         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1154                                                                         \
1155         return snprintf(buf, 20, format_string, cast rphy->field);      \
1156 }
1157
1158 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1159         sas_rphy_show_simple(field, name, format_string, (type))        \
1160 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1161                 show_sas_rphy_##name, NULL)
1162
1163 #define sas_rphy_show_protocol(field, name)                             \
1164 static ssize_t                                                          \
1165 show_sas_rphy_##name(struct device *dev,                                \
1166                      struct device_attribute *attr, char *buf)          \
1167 {                                                                       \
1168         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1169                                                                         \
1170         if (!rphy->field)                                       \
1171                 return snprintf(buf, 20, "none\n");                     \
1172         return get_sas_protocol_names(rphy->field, buf);        \
1173 }
1174
1175 #define sas_rphy_protocol_attr(field, name)                             \
1176         sas_rphy_show_protocol(field, name)                             \
1177 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1178                 show_sas_rphy_##name, NULL)
1179
1180 static ssize_t
1181 show_sas_rphy_device_type(struct device *dev,
1182                           struct device_attribute *attr, char *buf)
1183 {
1184         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1185
1186         if (!rphy->identify.device_type)
1187                 return snprintf(buf, 20, "none\n");
1188         return get_sas_device_type_names(
1189                         rphy->identify.device_type, buf);
1190 }
1191
1192 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1193                 show_sas_rphy_device_type, NULL);
1194
1195 static ssize_t
1196 show_sas_rphy_enclosure_identifier(struct device *dev,
1197                                    struct device_attribute *attr, char *buf)
1198 {
1199         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1200         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1201         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1202         struct sas_internal *i = to_sas_internal(shost->transportt);
1203         u64 identifier;
1204         int error;
1205
1206         error = i->f->get_enclosure_identifier(rphy, &identifier);
1207         if (error)
1208                 return error;
1209         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1210 }
1211
1212 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1213                 show_sas_rphy_enclosure_identifier, NULL);
1214
1215 static ssize_t
1216 show_sas_rphy_bay_identifier(struct device *dev,
1217                              struct device_attribute *attr, char *buf)
1218 {
1219         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1220         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1221         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1222         struct sas_internal *i = to_sas_internal(shost->transportt);
1223         int val;
1224
1225         val = i->f->get_bay_identifier(rphy);
1226         if (val < 0)
1227                 return val;
1228         return sprintf(buf, "%d\n", val);
1229 }
1230
1231 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1232                 show_sas_rphy_bay_identifier, NULL);
1233
1234 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1235                 initiator_port_protocols);
1236 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1237 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1238                 unsigned long long);
1239 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1240 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1241
1242 /* only need 8 bytes of data plus header (4 or 8) */
1243 #define BUF_SIZE 64
1244
1245 int sas_read_port_mode_page(struct scsi_device *sdev)
1246 {
1247         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1248         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1249         struct scsi_mode_data mode_data;
1250         int res, error;
1251
1252         if (!buffer)
1253                 return -ENOMEM;
1254
1255         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1256                               &mode_data, NULL);
1257
1258         error = -EINVAL;
1259         if (!scsi_status_is_good(res))
1260                 goto out;
1261
1262         msdata = buffer +  mode_data.header_length +
1263                 mode_data.block_descriptor_length;
1264
1265         if (msdata - buffer > BUF_SIZE - 8)
1266                 goto out;
1267
1268         error = 0;
1269
1270         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1271         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1272         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1273
1274  out:
1275         kfree(buffer);
1276         return error;
1277 }
1278 EXPORT_SYMBOL(sas_read_port_mode_page);
1279
1280 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1281                                "sas_end_device", NULL, NULL, NULL);
1282
1283 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1284 static ssize_t                                                          \
1285 show_sas_end_dev_##name(struct device *dev,                             \
1286                         struct device_attribute *attr, char *buf)       \
1287 {                                                                       \
1288         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1289         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1290                                                                         \
1291         return snprintf(buf, 20, format_string, cast rdev->field);      \
1292 }
1293
1294 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1295         sas_end_dev_show_simple(field, name, format_string, (type))     \
1296 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1297                 show_sas_end_dev_##name, NULL)
1298
1299 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1300 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1301                         "%d\n", int);
1302 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1303                         "%d\n", int);
1304 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1305                         "%d\n", int);
1306 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1307                         "%d\n", int);
1308
1309 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1310                                "sas_expander", NULL, NULL, NULL);
1311
1312 #define sas_expander_show_simple(field, name, format_string, cast)      \
1313 static ssize_t                                                          \
1314 show_sas_expander_##name(struct device *dev,                            \
1315                          struct device_attribute *attr, char *buf)      \
1316 {                                                                       \
1317         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1318         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1319                                                                         \
1320         return snprintf(buf, 20, format_string, cast edev->field);      \
1321 }
1322
1323 #define sas_expander_simple_attr(field, name, format_string, type)      \
1324         sas_expander_show_simple(field, name, format_string, (type))    \
1325 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1326                 show_sas_expander_##name, NULL)
1327
1328 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1329 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1330 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1331 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1332                          "%s\n", char *);
1333 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1334 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1335                          unsigned int);
1336 sas_expander_simple_attr(level, level, "%d\n", int);
1337
1338 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1339                 "sas_device", NULL, NULL, NULL);
1340
1341 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1342 {
1343         struct Scsi_Host *shost;
1344         struct sas_internal *i;
1345
1346         if (!scsi_is_sas_rphy(dev))
1347                 return 0;
1348         shost = dev_to_shost(dev->parent->parent);
1349
1350         if (!shost->transportt)
1351                 return 0;
1352         if (shost->transportt->host_attrs.ac.class !=
1353                         &sas_host_class.class)
1354                 return 0;
1355
1356         i = to_sas_internal(shost->transportt);
1357         return &i->rphy_attr_cont.ac == cont;
1358 }
1359
1360 static int sas_end_dev_match(struct attribute_container *cont,
1361                              struct device *dev)
1362 {
1363         struct Scsi_Host *shost;
1364         struct sas_internal *i;
1365         struct sas_rphy *rphy;
1366
1367         if (!scsi_is_sas_rphy(dev))
1368                 return 0;
1369         shost = dev_to_shost(dev->parent->parent);
1370         rphy = dev_to_rphy(dev);
1371
1372         if (!shost->transportt)
1373                 return 0;
1374         if (shost->transportt->host_attrs.ac.class !=
1375                         &sas_host_class.class)
1376                 return 0;
1377
1378         i = to_sas_internal(shost->transportt);
1379         return &i->end_dev_attr_cont.ac == cont &&
1380                 rphy->identify.device_type == SAS_END_DEVICE;
1381 }
1382
1383 static int sas_expander_match(struct attribute_container *cont,
1384                               struct device *dev)
1385 {
1386         struct Scsi_Host *shost;
1387         struct sas_internal *i;
1388         struct sas_rphy *rphy;
1389
1390         if (!scsi_is_sas_rphy(dev))
1391                 return 0;
1392         shost = dev_to_shost(dev->parent->parent);
1393         rphy = dev_to_rphy(dev);
1394
1395         if (!shost->transportt)
1396                 return 0;
1397         if (shost->transportt->host_attrs.ac.class !=
1398                         &sas_host_class.class)
1399                 return 0;
1400
1401         i = to_sas_internal(shost->transportt);
1402         return &i->expander_attr_cont.ac == cont &&
1403                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1404                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1405 }
1406
1407 static void sas_expander_release(struct device *dev)
1408 {
1409         struct sas_rphy *rphy = dev_to_rphy(dev);
1410         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1411
1412         if (rphy->q)
1413                 blk_cleanup_queue(rphy->q);
1414
1415         put_device(dev->parent);
1416         kfree(edev);
1417 }
1418
1419 static void sas_end_device_release(struct device *dev)
1420 {
1421         struct sas_rphy *rphy = dev_to_rphy(dev);
1422         struct sas_end_device *edev = rphy_to_end_device(rphy);
1423
1424         if (rphy->q)
1425                 blk_cleanup_queue(rphy->q);
1426
1427         put_device(dev->parent);
1428         kfree(edev);
1429 }
1430
1431 /**
1432  * sas_rphy_initialize - common rphy initialization
1433  * @rphy:       rphy to initialise
1434  *
1435  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1436  * initialise the common rphy component of each.
1437  */
1438 static void sas_rphy_initialize(struct sas_rphy *rphy)
1439 {
1440         INIT_LIST_HEAD(&rphy->list);
1441 }
1442
1443 /**
1444  * sas_end_device_alloc - allocate an rphy for an end device
1445  * @parent: which port
1446  *
1447  * Allocates an SAS remote PHY structure, connected to @parent.
1448  *
1449  * Returns:
1450  *      SAS PHY allocated or %NULL if the allocation failed.
1451  */
1452 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1453 {
1454         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1455         struct sas_end_device *rdev;
1456
1457         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1458         if (!rdev) {
1459                 return NULL;
1460         }
1461
1462         device_initialize(&rdev->rphy.dev);
1463         rdev->rphy.dev.parent = get_device(&parent->dev);
1464         rdev->rphy.dev.release = sas_end_device_release;
1465         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1466                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1467                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1468                              shost->host_no, rphy->scsi_target_id,
1469                              parent->port_identifier);
1470         } else
1471                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1472                              shost->host_no, parent->port_identifier);
1473         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1474         sas_rphy_initialize(&rdev->rphy);
1475         transport_setup_device(&rdev->rphy.dev);
1476
1477         return &rdev->rphy;
1478 }
1479 EXPORT_SYMBOL(sas_end_device_alloc);
1480
1481 /**
1482  * sas_expander_alloc - allocate an rphy for an end device
1483  * @parent: which port
1484  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1485  *
1486  * Allocates an SAS remote PHY structure, connected to @parent.
1487  *
1488  * Returns:
1489  *      SAS PHY allocated or %NULL if the allocation failed.
1490  */
1491 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1492                                     enum sas_device_type type)
1493 {
1494         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1495         struct sas_expander_device *rdev;
1496         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1497
1498         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1499                type != SAS_FANOUT_EXPANDER_DEVICE);
1500
1501         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1502         if (!rdev) {
1503                 return NULL;
1504         }
1505
1506         device_initialize(&rdev->rphy.dev);
1507         rdev->rphy.dev.parent = get_device(&parent->dev);
1508         rdev->rphy.dev.release = sas_expander_release;
1509         mutex_lock(&sas_host->lock);
1510         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1511         mutex_unlock(&sas_host->lock);
1512         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1513                      shost->host_no, rdev->rphy.scsi_target_id);
1514         rdev->rphy.identify.device_type = type;
1515         sas_rphy_initialize(&rdev->rphy);
1516         transport_setup_device(&rdev->rphy.dev);
1517
1518         return &rdev->rphy;
1519 }
1520 EXPORT_SYMBOL(sas_expander_alloc);
1521
1522 /**
1523  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1524  * @rphy:       The remote PHY to be added
1525  *
1526  * Publishes a SAS remote PHY to the rest of the system.
1527  */
1528 int sas_rphy_add(struct sas_rphy *rphy)
1529 {
1530         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1531         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1532         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1533         struct sas_identify *identify = &rphy->identify;
1534         int error;
1535
1536         if (parent->rphy)
1537                 return -ENXIO;
1538         parent->rphy = rphy;
1539
1540         error = device_add(&rphy->dev);
1541         if (error)
1542                 return error;
1543         transport_add_device(&rphy->dev);
1544         transport_configure_device(&rphy->dev);
1545         if (sas_bsg_initialize(shost, rphy))
1546                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1547
1548
1549         mutex_lock(&sas_host->lock);
1550         list_add_tail(&rphy->list, &sas_host->rphy_list);
1551         if (identify->device_type == SAS_END_DEVICE &&
1552             (identify->target_port_protocols &
1553              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1554                 rphy->scsi_target_id = sas_host->next_target_id++;
1555         else if (identify->device_type == SAS_END_DEVICE)
1556                 rphy->scsi_target_id = -1;
1557         mutex_unlock(&sas_host->lock);
1558
1559         if (identify->device_type == SAS_END_DEVICE &&
1560             rphy->scsi_target_id != -1) {
1561                 int lun;
1562
1563                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1564                         lun = SCAN_WILD_CARD;
1565                 else
1566                         lun = 0;
1567
1568                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1569                                  SCSI_SCAN_INITIAL);
1570         }
1571
1572         return 0;
1573 }
1574 EXPORT_SYMBOL(sas_rphy_add);
1575
1576 /**
1577  * sas_rphy_free  -  free a SAS remote PHY
1578  * @rphy: SAS remote PHY to free
1579  *
1580  * Frees the specified SAS remote PHY.
1581  *
1582  * Note:
1583  *   This function must only be called on a remote
1584  *   PHY that has not successfully been added using
1585  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1586  */
1587 void sas_rphy_free(struct sas_rphy *rphy)
1588 {
1589         struct device *dev = &rphy->dev;
1590         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1591         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1592
1593         mutex_lock(&sas_host->lock);
1594         list_del(&rphy->list);
1595         mutex_unlock(&sas_host->lock);
1596
1597         transport_destroy_device(dev);
1598
1599         put_device(dev);
1600 }
1601 EXPORT_SYMBOL(sas_rphy_free);
1602
1603 /**
1604  * sas_rphy_delete  -  remove and free SAS remote PHY
1605  * @rphy:       SAS remote PHY to remove and free
1606  *
1607  * Removes the specified SAS remote PHY and frees it.
1608  */
1609 void
1610 sas_rphy_delete(struct sas_rphy *rphy)
1611 {
1612         sas_rphy_remove(rphy);
1613         sas_rphy_free(rphy);
1614 }
1615 EXPORT_SYMBOL(sas_rphy_delete);
1616
1617 /**
1618  * sas_rphy_unlink  -  unlink SAS remote PHY
1619  * @rphy:       SAS remote phy to unlink from its parent port
1620  *
1621  * Removes port reference to an rphy
1622  */
1623 void sas_rphy_unlink(struct sas_rphy *rphy)
1624 {
1625         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1626
1627         parent->rphy = NULL;
1628 }
1629 EXPORT_SYMBOL(sas_rphy_unlink);
1630
1631 /**
1632  * sas_rphy_remove  -  remove SAS remote PHY
1633  * @rphy:       SAS remote phy to remove
1634  *
1635  * Removes the specified SAS remote PHY.
1636  */
1637 void
1638 sas_rphy_remove(struct sas_rphy *rphy)
1639 {
1640         struct device *dev = &rphy->dev;
1641
1642         switch (rphy->identify.device_type) {
1643         case SAS_END_DEVICE:
1644                 scsi_remove_target(dev);
1645                 break;
1646         case SAS_EDGE_EXPANDER_DEVICE:
1647         case SAS_FANOUT_EXPANDER_DEVICE:
1648                 sas_remove_children(dev);
1649                 break;
1650         default:
1651                 break;
1652         }
1653
1654         sas_rphy_unlink(rphy);
1655         if (rphy->q)
1656                 bsg_unregister_queue(rphy->q);
1657         transport_remove_device(dev);
1658         device_del(dev);
1659 }
1660 EXPORT_SYMBOL(sas_rphy_remove);
1661
1662 /**
1663  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1664  * @dev:        device to check
1665  *
1666  * Returns:
1667  *      %1 if the device represents a SAS remote PHY, %0 else
1668  */
1669 int scsi_is_sas_rphy(const struct device *dev)
1670 {
1671         return dev->release == sas_end_device_release ||
1672                 dev->release == sas_expander_release;
1673 }
1674 EXPORT_SYMBOL(scsi_is_sas_rphy);
1675
1676
1677 /*
1678  * SCSI scan helper
1679  */
1680
1681 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1682                 uint id, u64 lun)
1683 {
1684         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1685         struct sas_rphy *rphy;
1686
1687         mutex_lock(&sas_host->lock);
1688         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1689                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1690                     rphy->scsi_target_id == -1)
1691                         continue;
1692
1693                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1694                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1695                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1696                                          lun, SCSI_SCAN_MANUAL);
1697                 }
1698         }
1699         mutex_unlock(&sas_host->lock);
1700
1701         return 0;
1702 }
1703
1704
1705 /*
1706  * Setup / Teardown code
1707  */
1708
1709 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1710         i->private_##attrb[count] = dev_attr_##field;           \
1711         i->private_##attrb[count].attr.mode = perm;                     \
1712         i->attrb[count] = &i->private_##attrb[count];                   \
1713         if (test)                                                       \
1714                 count++
1715
1716 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1717         i->private_##attrb[count] = dev_attr_##field;           \
1718         i->private_##attrb[count].attr.mode = perm;                     \
1719         if (ro_test) {                                                  \
1720                 i->private_##attrb[count].attr.mode = ro_perm;          \
1721                 i->private_##attrb[count].store = NULL;                 \
1722         }                                                               \
1723         i->attrb[count] = &i->private_##attrb[count];                   \
1724         if (test)                                                       \
1725                 count++
1726
1727 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1728         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1729
1730 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1731         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1732
1733 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1734         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1735
1736 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1737         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1738                         !i->f->set_phy_speed, S_IRUGO)
1739
1740 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1741         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1742                           !i->f->func, S_IRUGO)
1743
1744 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1745         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1746
1747 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1748         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1749
1750 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1751         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1752
1753 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1754         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1755
1756 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1757         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1758
1759 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1760         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1761
1762 /**
1763  * sas_attach_transport  -  instantiate SAS transport template
1764  * @ft:         SAS transport class function template
1765  */
1766 struct scsi_transport_template *
1767 sas_attach_transport(struct sas_function_template *ft)
1768 {
1769         struct sas_internal *i;
1770         int count;
1771
1772         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1773         if (!i)
1774                 return NULL;
1775
1776         i->t.user_scan = sas_user_scan;
1777
1778         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1779         i->t.host_attrs.ac.class = &sas_host_class.class;
1780         i->t.host_attrs.ac.match = sas_host_match;
1781         transport_container_register(&i->t.host_attrs);
1782         i->t.host_size = sizeof(struct sas_host_attrs);
1783
1784         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1785         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1786         i->phy_attr_cont.ac.match = sas_phy_match;
1787         transport_container_register(&i->phy_attr_cont);
1788
1789         i->port_attr_cont.ac.class = &sas_port_class.class;
1790         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1791         i->port_attr_cont.ac.match = sas_port_match;
1792         transport_container_register(&i->port_attr_cont);
1793
1794         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1795         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1796         i->rphy_attr_cont.ac.match = sas_rphy_match;
1797         transport_container_register(&i->rphy_attr_cont);
1798
1799         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1800         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1801         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1802         transport_container_register(&i->end_dev_attr_cont);
1803
1804         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1805         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1806         i->expander_attr_cont.ac.match = sas_expander_match;
1807         transport_container_register(&i->expander_attr_cont);
1808
1809         i->f = ft;
1810
1811         count = 0;
1812         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1813         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1814         SETUP_PHY_ATTRIBUTE(device_type);
1815         SETUP_PHY_ATTRIBUTE(sas_address);
1816         SETUP_PHY_ATTRIBUTE(phy_identifier);
1817         //SETUP_PHY_ATTRIBUTE(port_identifier);
1818         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1819         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1820         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1821         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1822         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1823
1824         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1825         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1826         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1827         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1828         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1829         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1830         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1831         i->phy_attrs[count] = NULL;
1832
1833         count = 0;
1834         SETUP_PORT_ATTRIBUTE(num_phys);
1835         i->port_attrs[count] = NULL;
1836
1837         count = 0;
1838         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1839         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1840         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1841         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1842         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1843         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1844         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1845                                        get_enclosure_identifier);
1846         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1847                                        get_bay_identifier);
1848         i->rphy_attrs[count] = NULL;
1849
1850         count = 0;
1851         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1852         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1853         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1854         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1855         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1856         i->end_dev_attrs[count] = NULL;
1857
1858         count = 0;
1859         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1860         SETUP_EXPANDER_ATTRIBUTE(product_id);
1861         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1862         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1863         SETUP_EXPANDER_ATTRIBUTE(component_id);
1864         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1865         SETUP_EXPANDER_ATTRIBUTE(level);
1866         i->expander_attrs[count] = NULL;
1867
1868         return &i->t;
1869 }
1870 EXPORT_SYMBOL(sas_attach_transport);
1871
1872 /**
1873  * sas_release_transport  -  release SAS transport template instance
1874  * @t:          transport template instance
1875  */
1876 void sas_release_transport(struct scsi_transport_template *t)
1877 {
1878         struct sas_internal *i = to_sas_internal(t);
1879
1880         transport_container_unregister(&i->t.host_attrs);
1881         transport_container_unregister(&i->phy_attr_cont);
1882         transport_container_unregister(&i->port_attr_cont);
1883         transport_container_unregister(&i->rphy_attr_cont);
1884         transport_container_unregister(&i->end_dev_attr_cont);
1885         transport_container_unregister(&i->expander_attr_cont);
1886
1887         kfree(i);
1888 }
1889 EXPORT_SYMBOL(sas_release_transport);
1890
1891 static __init int sas_transport_init(void)
1892 {
1893         int error;
1894
1895         error = transport_class_register(&sas_host_class);
1896         if (error)
1897                 goto out;
1898         error = transport_class_register(&sas_phy_class);
1899         if (error)
1900                 goto out_unregister_transport;
1901         error = transport_class_register(&sas_port_class);
1902         if (error)
1903                 goto out_unregister_phy;
1904         error = transport_class_register(&sas_rphy_class);
1905         if (error)
1906                 goto out_unregister_port;
1907         error = transport_class_register(&sas_end_dev_class);
1908         if (error)
1909                 goto out_unregister_rphy;
1910         error = transport_class_register(&sas_expander_class);
1911         if (error)
1912                 goto out_unregister_end_dev;
1913
1914         return 0;
1915
1916  out_unregister_end_dev:
1917         transport_class_unregister(&sas_end_dev_class);
1918  out_unregister_rphy:
1919         transport_class_unregister(&sas_rphy_class);
1920  out_unregister_port:
1921         transport_class_unregister(&sas_port_class);
1922  out_unregister_phy:
1923         transport_class_unregister(&sas_phy_class);
1924  out_unregister_transport:
1925         transport_class_unregister(&sas_host_class);
1926  out:
1927         return error;
1928
1929 }
1930
1931 static void __exit sas_transport_exit(void)
1932 {
1933         transport_class_unregister(&sas_host_class);
1934         transport_class_unregister(&sas_phy_class);
1935         transport_class_unregister(&sas_port_class);
1936         transport_class_unregister(&sas_rphy_class);
1937         transport_class_unregister(&sas_end_dev_class);
1938         transport_class_unregister(&sas_expander_class);
1939 }
1940
1941 MODULE_AUTHOR("Christoph Hellwig");
1942 MODULE_DESCRIPTION("SAS Transport Attributes");
1943 MODULE_LICENSE("GPL");
1944
1945 module_init(sas_transport_init);
1946 module_exit(sas_transport_exit);