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