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