drivers/scsi/scsi_transport_sas.c

   1 /*
   2  * Copyright (C) 2005-2006 Dell Inc.
   3  *      Released under GPL v2.
   4  *
   5  * Serial Attached SCSI (SAS) transport class.
   6  *
   7  * The SAS transport class contains common code to deal with SAS HBAs,
   8  * an aproximated representation of SAS topologies in the driver model,
   9  * and various sysfs attributes to expose these topologies and management
  10  * interfaces to userspace.
  11  *
  12  * In addition to the basic SCSI core objects this transport class
  13  * introduces two additional intermediate objects:  The SAS PHY
  14  * as represented by struct sas_phy defines an "outgoing" PHY on
  15  * a SAS HBA or Expander, and the SAS remote PHY represented by
  16  * struct sas_rphy defines an "incoming" PHY on a SAS Expander or
  17  * end device.  Note that this is purely a software concept, the
  18  * underlying hardware for a PHY and a remote PHY is the exactly
  19  * the same.
  20  *
  21  * There is no concept of a SAS port in this code, users can see
  22  * what PHYs form a wide port based on the port_identifier attribute,
  23  * which is the same for all PHYs in a port.
  24  */
  25
  26 #include <linux/init.h>
  27 #include <linux/module.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/err.h>
  30 #include <linux/slab.h>
  31 #include <linux/string.h>
  32 #include <linux/blkdev.h>
  33 #include <linux/bsg.h>
  34
  35 #include <scsi/scsi.h>
  36 #include <scsi/scsi_device.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_transport.h>
  39 #include <scsi/scsi_transport_sas.h>
  40
  41 #include "scsi_sas_internal.h"
  42 struct sas_host_attrs {
  43         struct list_head rphy_list;
  44         struct mutex lock;
  45         struct request_queue *q;
  46         u32 next_target_id;
  47         u32 next_expander_id;
  48         int next_port_id;
  49 };
  50 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
  51
  52
  53 /*
  54  * Hack to allow attributes of the same name in different objects.
  55  */
  56 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  57         struct device_attribute dev_attr_##_prefix##_##_name = \
  58         __ATTR(_name,_mode,_show,_store)
  59
  60
  61 /*
  62  * Pretty printing helpers
  63  */
  64
  65 #define sas_bitfield_name_match(title, table)                   \
  66 static ssize_t                                                  \
  67 get_sas_##title##_names(u32 table_key, char *buf)               \
  68 {                                                               \
  69         char *prefix = "";                                      \
  70         ssize_t len = 0;                                        \
  71         int i;                                                  \
  72                                                                 \
  73         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  74                 if (table[i].value & table_key) {               \
  75                         len += sprintf(buf + len, "%s%s",       \
  76                                 prefix, table[i].name);         \
  77                         prefix = ", ";                          \
  78                 }                                               \
  79         }                                                       \
  80         len += sprintf(buf + len, "\n");                        \
  81         return len;                                             \
  82 }
  83
  84 #define sas_bitfield_name_set(title, table)                     \
  85 static ssize_t                                                  \
  86 set_sas_##title##_names(u32 *table_key, const char *buf)        \
  87 {                                                               \
  88         ssize_t len = 0;                                        \
  89         int i;                                                  \
  90                                                                 \
  91         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  92                 len = strlen(table[i].name);                    \
  93                 if (strncmp(buf, table[i].name, len) == 0 &&    \
  94                     (buf[len] == '\n' || buf[len] == '\0')) {   \
  95                         *table_key = table[i].value;            \
  96                         return 0;                               \
  97                 }                                               \
  98         }                                                       \
  99         return -EINVAL;                                         \
 100 }
 101
 102 #define sas_bitfield_name_search(title, table)                  \
 103 static ssize_t                                                  \
 104 get_sas_##title##_names(u32 table_key, char *buf)               \
 105 {                                                               \
 106         ssize_t len = 0;                                        \
 107         int i;                                                  \
 108                                                                 \
 109         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 110                 if (table[i].value == table_key) {              \
 111                         len += sprintf(buf + len, "%s",         \
 112                                 table[i].name);                 \
 113                         break;                                  \
 114                 }                                               \
 115         }                                                       \
 116         len += sprintf(buf + len, "\n");                        \
 117         return len;                                             \
 118 }
 119
 120 static struct {
 121         u32             value;
 122         char            *name;
 123 } sas_device_type_names[] = {
 124         { SAS_PHY_UNUSED,               "unused" },
 125         { SAS_END_DEVICE,               "end device" },
 126         { SAS_EDGE_EXPANDER_DEVICE,     "edge expander" },
 127         { SAS_FANOUT_EXPANDER_DEVICE,   "fanout expander" },
 128 };
 129 sas_bitfield_name_search(device_type, sas_device_type_names)
 130
 131
 132 static struct {
 133         u32             value;
 134         char            *name;
 135 } sas_protocol_names[] = {
 136         { SAS_PROTOCOL_SATA,            "sata" },
 137         { SAS_PROTOCOL_SMP,             "smp" },
 138         { SAS_PROTOCOL_STP,             "stp" },
 139         { SAS_PROTOCOL_SSP,             "ssp" },
 140 };
 141 sas_bitfield_name_match(protocol, sas_protocol_names)
 142
 143 static struct {
 144         u32             value;
 145         char            *name;
 146 } sas_linkspeed_names[] = {
 147         { SAS_LINK_RATE_UNKNOWN,        "Unknown" },
 148         { SAS_PHY_DISABLED,             "Phy disabled" },
 149         { SAS_LINK_RATE_FAILED,         "Link Rate failed" },
 150         { SAS_SATA_SPINUP_HOLD,         "Spin-up hold" },
 151         { SAS_LINK_RATE_1_5_GBPS,       "1.5 Gbit" },
 152         { SAS_LINK_RATE_3_0_GBPS,       "3.0 Gbit" },
 153         { SAS_LINK_RATE_6_0_GBPS,       "6.0 Gbit" },
 154 };
 155 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 156 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 157
 158 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 159 {
 160         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 161         struct sas_end_device *rdev;
 162
 163         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 164
 165         rdev = rphy_to_end_device(rphy);
 166         return rdev;
 167 }
 168
 169 static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
 170                             struct sas_rphy *rphy)
 171 {
 172         struct request *req;
 173         int ret;
 174         int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 175
 176         while ((req = blk_fetch_request(q)) != NULL) {
 177                 spin_unlock_irq(q->queue_lock);
 178
 179                 handler = to_sas_internal(shost->transportt)->f->smp_handler;
 180                 ret = handler(shost, rphy, req);
 181                 req->errors = ret;
 182
 183                 blk_end_request_all(req, ret);
 184
 185                 spin_lock_irq(q->queue_lock);
 186         }
 187 }
 188
 189 static void sas_host_smp_request(struct request_queue *q)
 190 {
 191         sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
 192 }
 193
 194 static void sas_non_host_smp_request(struct request_queue *q)
 195 {
 196         struct sas_rphy *rphy = q->queuedata;
 197         sas_smp_request(q, rphy_to_shost(rphy), rphy);
 198 }
 199
 200 static void sas_host_release(struct device *dev)
 201 {
 202         struct Scsi_Host *shost = dev_to_shost(dev);
 203         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 204         struct request_queue *q = sas_host->q;
 205
 206         if (q)
 207                 blk_cleanup_queue(q);
 208 }
 209
 210 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 211 {
 212         struct request_queue *q;
 213         int error;
 214         struct device *dev;
 215         char namebuf[20];
 216         const char *name;
 217         void (*release)(struct device *);
 218
 219         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 220                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 221                 return 0;
 222         }
 223
 224         if (rphy) {
 225                 q = blk_init_queue(sas_non_host_smp_request, NULL);
 226                 dev = &rphy->dev;
 227                 name = dev_name(dev);
 228                 release = NULL;
 229         } else {
 230                 q = blk_init_queue(sas_host_smp_request, NULL);
 231                 dev = &shost->shost_gendev;
 232                 snprintf(namebuf, sizeof(namebuf),
 233                          "sas_host%d", shost->host_no);
 234                 name = namebuf;
 235                 release = sas_host_release;
 236         }
 237         if (!q)
 238                 return -ENOMEM;
 239
 240         error = bsg_register_queue(q, dev, name, release);
 241         if (error) {
 242                 blk_cleanup_queue(q);
 243                 return -ENOMEM;
 244         }
 245
 246         if (rphy)
 247                 rphy->q = q;
 248         else
 249                 to_sas_host_attrs(shost)->q = q;
 250
 251         if (rphy)
 252                 q->queuedata = rphy;
 253         else
 254                 q->queuedata = shost;
 255
 256         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
 257         return 0;
 258 }
 259
 260 static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
 261 {
 262         struct request_queue *q;
 263
 264         if (rphy)
 265                 q = rphy->q;
 266         else
 267                 q = to_sas_host_attrs(shost)->q;
 268
 269         if (!q)
 270                 return;
 271
 272         bsg_unregister_queue(q);
 273 }
 274
 275 /*
 276  * SAS host attributes
 277  */
 278
 279 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 280                           struct device *cdev)
 281 {
 282         struct Scsi_Host *shost = dev_to_shost(dev);
 283         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 284
 285         INIT_LIST_HEAD(&sas_host->rphy_list);
 286         mutex_init(&sas_host->lock);
 287         sas_host->next_target_id = 0;
 288         sas_host->next_expander_id = 0;
 289         sas_host->next_port_id = 0;
 290
 291         if (sas_bsg_initialize(shost, NULL))
 292                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 293                            shost->host_no);
 294
 295         return 0;
 296 }
 297
 298 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 299                            struct device *cdev)
 300 {
 301         struct Scsi_Host *shost = dev_to_shost(dev);
 302
 303         sas_bsg_remove(shost, NULL);
 304
 305         return 0;
 306 }
 307
 308 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 309                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 310
 311 static int sas_host_match(struct attribute_container *cont,
 312                             struct device *dev)
 313 {
 314         struct Scsi_Host *shost;
 315         struct sas_internal *i;
 316
 317         if (!scsi_is_host_device(dev))
 318                 return 0;
 319         shost = dev_to_shost(dev);
 320
 321         if (!shost->transportt)
 322                 return 0;
 323         if (shost->transportt->host_attrs.ac.class !=
 324                         &sas_host_class.class)
 325                 return 0;
 326
 327         i = to_sas_internal(shost->transportt);
 328         return &i->t.host_attrs.ac == cont;
 329 }
 330
 331 static int do_sas_phy_delete(struct device *dev, void *data)
 332 {
 333         int pass = (int)(unsigned long)data;
 334
 335         if (pass == 0 && scsi_is_sas_port(dev))
 336                 sas_port_delete(dev_to_sas_port(dev));
 337         else if (pass == 1 && scsi_is_sas_phy(dev))
 338                 sas_phy_delete(dev_to_phy(dev));
 339         return 0;
 340 }
 341
 342 /**
 343  * sas_remove_children  -  tear down a devices SAS data structures
 344  * @dev:        device belonging to the sas object
 345  *
 346  * Removes all SAS PHYs and remote PHYs for a given object
 347  */
 348 void sas_remove_children(struct device *dev)
 349 {
 350         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 351         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 352 }
 353 EXPORT_SYMBOL(sas_remove_children);
 354
 355 /**
 356  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 357  * @shost:      Scsi Host that is torn down
 358  *
 359  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
 360  * Must be called just before scsi_remove_host for SAS HBAs.
 361  */
 362 void sas_remove_host(struct Scsi_Host *shost)
 363 {
 364         sas_remove_children(&shost->shost_gendev);
 365 }
 366 EXPORT_SYMBOL(sas_remove_host);
 367
 368 /**
 369  * sas_tlr_supported - checking TLR bit in vpd 0x90
 370  * @sdev: scsi device struct
 371  *
 372  * Check Transport Layer Retries are supported or not.
 373  * If vpd page 0x90 is present, TRL is supported.
 374  *
 375  */
 376 unsigned int
 377 sas_tlr_supported(struct scsi_device *sdev)
 378 {
 379         const int vpd_len = 32;
 380         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 381         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 382         int ret = 0;
 383
 384         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 385                 goto out;
 386
 387         /*
 388          * Magic numbers: the VPD Protocol page (0x90)
 389          * has a 4 byte header and then one entry per device port
 390          * the TLR bit is at offset 8 on each port entry
 391          * if we take the first port, that's at total offset 12
 392          */
 393         ret = buffer[12] & 0x01;
 394
 395  out:
 396         kfree(buffer);
 397         rdev->tlr_supported = ret;
 398         return ret;
 399
 400 }
 401 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 402
 403 /**
 404  * sas_disable_tlr - setting TLR flags
 405  * @sdev: scsi device struct
 406  *
 407  * Seting tlr_enabled flag to 0.
 408  *
 409  */
 410 void
 411 sas_disable_tlr(struct scsi_device *sdev)
 412 {
 413         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 414
 415         rdev->tlr_enabled = 0;
 416 }
 417 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 418
 419 /**
 420  * sas_enable_tlr - setting TLR flags
 421  * @sdev: scsi device struct
 422  *
 423  * Seting tlr_enabled flag 1.
 424  *
 425  */
 426 void sas_enable_tlr(struct scsi_device *sdev)
 427 {
 428         unsigned int tlr_supported = 0;
 429         tlr_supported  = sas_tlr_supported(sdev);
 430
 431         if (tlr_supported) {
 432                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 433
 434                 rdev->tlr_enabled = 1;
 435         }
 436
 437         return;
 438 }
 439 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 440
 441 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 442 {
 443         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 444         return rdev->tlr_enabled;
 445 }
 446 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 447
 448 /*
 449  * SAS Phy attributes
 450  */
 451
 452 #define sas_phy_show_simple(field, name, format_string, cast)           \
 453 static ssize_t                                                          \
 454 show_sas_phy_##name(struct device *dev,                                 \
 455                     struct device_attribute *attr, char *buf)           \
 456 {                                                                       \
 457         struct sas_phy *phy = transport_class_to_phy(dev);              \
 458                                                                         \
 459         return snprintf(buf, 20, format_string, cast phy->field);       \
 460 }
 461
 462 #define sas_phy_simple_attr(field, name, format_string, type)           \
 463         sas_phy_show_simple(field, name, format_string, (type)) \
 464 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 465
 466 #define sas_phy_show_protocol(field, name)                              \
 467 static ssize_t                                                          \
 468 show_sas_phy_##name(struct device *dev,                                 \
 469                     struct device_attribute *attr, char *buf)           \
 470 {                                                                       \
 471         struct sas_phy *phy = transport_class_to_phy(dev);              \
 472                                                                         \
 473         if (!phy->field)                                                \
 474                 return snprintf(buf, 20, "none\n");                     \
 475         return get_sas_protocol_names(phy->field, buf);         \
 476 }
 477
 478 #define sas_phy_protocol_attr(field, name)                              \
 479         sas_phy_show_protocol(field, name)                              \
 480 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 481
 482 #define sas_phy_show_linkspeed(field)                                   \
 483 static ssize_t                                                          \
 484 show_sas_phy_##field(struct device *dev,                                \
 485                      struct device_attribute *attr, char *buf)          \
 486 {                                                                       \
 487         struct sas_phy *phy = transport_class_to_phy(dev);              \
 488                                                                         \
 489         return get_sas_linkspeed_names(phy->field, buf);                \
 490 }
 491
 492 /* Fudge to tell if we're minimum or maximum */
 493 #define sas_phy_store_linkspeed(field)                                  \
 494 static ssize_t                                                          \
 495 store_sas_phy_##field(struct device *dev,                               \
 496                       struct device_attribute *attr,                    \
 497                       const char *buf,  size_t count)                   \
 498 {                                                                       \
 499         struct sas_phy *phy = transport_class_to_phy(dev);              \
 500         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 501         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 502         u32 value;                                                      \
 503         struct sas_phy_linkrates rates = {0};                           \
 504         int error;                                                      \
 505                                                                         \
 506         error = set_sas_linkspeed_names(&value, buf);                   \
 507         if (error)                                                      \
 508                 return error;                                           \
 509         rates.field = value;                                            \
 510         error = i->f->set_phy_speed(phy, &rates);                       \
 511                                                                         \
 512         return error ? error : count;                                   \
 513 }
 514
 515 #define sas_phy_linkspeed_rw_attr(field)                                \
 516         sas_phy_show_linkspeed(field)                                   \
 517         sas_phy_store_linkspeed(field)                                  \
 518 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 519         store_sas_phy_##field)
 520
 521 #define sas_phy_linkspeed_attr(field)                                   \
 522         sas_phy_show_linkspeed(field)                                   \
 523 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 524
 525
 526 #define sas_phy_show_linkerror(field)                                   \
 527 static ssize_t                                                          \
 528 show_sas_phy_##field(struct device *dev,                                \
 529                      struct device_attribute *attr, char *buf)          \
 530 {                                                                       \
 531         struct sas_phy *phy = transport_class_to_phy(dev);              \
 532         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 533         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 534         int error;                                                      \
 535                                                                         \
 536         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 537         if (error)                                                      \
 538                 return error;                                           \
 539         return snprintf(buf, 20, "%u\n", phy->field);                   \
 540 }
 541
 542 #define sas_phy_linkerror_attr(field)                                   \
 543         sas_phy_show_linkerror(field)                                   \
 544 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 545
 546
 547 static ssize_t
 548 show_sas_device_type(struct device *dev,
 549                      struct device_attribute *attr, char *buf)
 550 {
 551         struct sas_phy *phy = transport_class_to_phy(dev);
 552
 553         if (!phy->identify.device_type)
 554                 return snprintf(buf, 20, "none\n");
 555         return get_sas_device_type_names(phy->identify.device_type, buf);
 556 }
 557 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 558
 559 static ssize_t do_sas_phy_enable(struct device *dev,
 560                 size_t count, int enable)
 561 {
 562         struct sas_phy *phy = transport_class_to_phy(dev);
 563         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 564         struct sas_internal *i = to_sas_internal(shost->transportt);
 565         int error;
 566
 567         error = i->f->phy_enable(phy, enable);
 568         if (error)
 569                 return error;
 570         phy->enabled = enable;
 571         return count;
 572 };
 573
 574 static ssize_t
 575 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 576                      const char *buf, size_t count)
 577 {
 578         if (count < 1)
 579                 return -EINVAL;
 580
 581         switch (buf[0]) {
 582         case '0':
 583                 do_sas_phy_enable(dev, count, 0);
 584                 break;
 585         case '1':
 586                 do_sas_phy_enable(dev, count, 1);
 587                 break;
 588         default:
 589                 return -EINVAL;
 590         }
 591
 592         return count;
 593 }
 594
 595 static ssize_t
 596 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 597                     char *buf)
 598 {
 599         struct sas_phy *phy = transport_class_to_phy(dev);
 600
 601         return snprintf(buf, 20, "%d", phy->enabled);
 602 }
 603
 604 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 605                          store_sas_phy_enable);
 606
 607 static ssize_t
 608 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 609 {
 610         struct sas_phy *phy = transport_class_to_phy(dev);
 611         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 612         struct sas_internal *i = to_sas_internal(shost->transportt);
 613         int error;
 614
 615         error = i->f->phy_reset(phy, hard_reset);
 616         if (error)
 617                 return error;
 618         return count;
 619 };
 620
 621 static ssize_t
 622 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 623                      const char *buf, size_t count)
 624 {
 625         return do_sas_phy_reset(dev, count, 0);
 626 }
 627 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 628
 629 static ssize_t
 630 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 631                      const char *buf, size_t count)
 632 {
 633         return do_sas_phy_reset(dev, count, 1);
 634 }
 635 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 636
 637 sas_phy_protocol_attr(identify.initiator_port_protocols,
 638                 initiator_port_protocols);
 639 sas_phy_protocol_attr(identify.target_port_protocols,
 640                 target_port_protocols);
 641 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 642                 unsigned long long);
 643 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 644 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 645 sas_phy_linkspeed_attr(negotiated_linkrate);
 646 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 647 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 648 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 649 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 650 sas_phy_linkerror_attr(invalid_dword_count);
 651 sas_phy_linkerror_attr(running_disparity_error_count);
 652 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 653 sas_phy_linkerror_attr(phy_reset_problem_count);
 654
 655
 656 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 657                 "sas_phy", NULL, NULL, NULL);
 658
 659 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 660 {
 661         struct Scsi_Host *shost;
 662         struct sas_internal *i;
 663
 664         if (!scsi_is_sas_phy(dev))
 665                 return 0;
 666         shost = dev_to_shost(dev->parent);
 667
 668         if (!shost->transportt)
 669                 return 0;
 670         if (shost->transportt->host_attrs.ac.class !=
 671                         &sas_host_class.class)
 672                 return 0;
 673
 674         i = to_sas_internal(shost->transportt);
 675         return &i->phy_attr_cont.ac == cont;
 676 }
 677
 678 static void sas_phy_release(struct device *dev)
 679 {
 680         struct sas_phy *phy = dev_to_phy(dev);
 681
 682         put_device(dev->parent);
 683         kfree(phy);
 684 }
 685
 686 /**
 687  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 688  * @parent:     Parent device
 689  * @number:     Phy index
 690  *
 691  * Allocates an SAS PHY structure.  It will be added in the device tree
 692  * below the device specified by @parent, which has to be either a Scsi_Host
 693  * or sas_rphy.
 694  *
 695  * Returns:
 696  *      SAS PHY allocated or %NULL if the allocation failed.
 697  */
 698 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 699 {
 700         struct Scsi_Host *shost = dev_to_shost(parent);
 701         struct sas_phy *phy;
 702
 703         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 704         if (!phy)
 705                 return NULL;
 706
 707         phy->number = number;
 708         phy->enabled = 1;
 709
 710         device_initialize(&phy->dev);
 711         phy->dev.parent = get_device(parent);
 712         phy->dev.release = sas_phy_release;
 713         INIT_LIST_HEAD(&phy->port_siblings);
 714         if (scsi_is_sas_expander_device(parent)) {
 715                 struct sas_rphy *rphy = dev_to_rphy(parent);
 716                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 717                         rphy->scsi_target_id, number);
 718         } else
 719                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 720
 721         transport_setup_device(&phy->dev);
 722
 723         return phy;
 724 }
 725 EXPORT_SYMBOL(sas_phy_alloc);
 726
 727 /**
 728  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 729  * @phy:        The PHY to be added
 730  *
 731  * Publishes a SAS PHY to the rest of the system.
 732  */
 733 int sas_phy_add(struct sas_phy *phy)
 734 {
 735         int error;
 736
 737         error = device_add(&phy->dev);
 738         if (!error) {
 739                 transport_add_device(&phy->dev);
 740                 transport_configure_device(&phy->dev);
 741         }
 742
 743         return error;
 744 }
 745 EXPORT_SYMBOL(sas_phy_add);
 746
 747 /**
 748  * sas_phy_free  -  free a SAS PHY
 749  * @phy:        SAS PHY to free
 750  *
 751  * Frees the specified SAS PHY.
 752  *
 753  * Note:
 754  *   This function must only be called on a PHY that has not
 755  *   successfully been added using sas_phy_add().
 756  */
 757 void sas_phy_free(struct sas_phy *phy)
 758 {
 759         transport_destroy_device(&phy->dev);
 760         put_device(&phy->dev);
 761 }
 762 EXPORT_SYMBOL(sas_phy_free);
 763
 764 /**
 765  * sas_phy_delete  -  remove SAS PHY
 766  * @phy:        SAS PHY to remove
 767  *
 768  * Removes the specified SAS PHY.  If the SAS PHY has an
 769  * associated remote PHY it is removed before.
 770  */
 771 void
 772 sas_phy_delete(struct sas_phy *phy)
 773 {
 774         struct device *dev = &phy->dev;
 775
 776         /* this happens if the phy is still part of a port when deleted */
 777         BUG_ON(!list_empty(&phy->port_siblings));
 778
 779         transport_remove_device(dev);
 780         device_del(dev);
 781         transport_destroy_device(dev);
 782         put_device(dev);
 783 }
 784 EXPORT_SYMBOL(sas_phy_delete);
 785
 786 /**
 787  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 788  * @dev:        device to check
 789  *
 790  * Returns:
 791  *      %1 if the device represents a SAS PHY, %0 else
 792  */
 793 int scsi_is_sas_phy(const struct device *dev)
 794 {
 795         return dev->release == sas_phy_release;
 796 }
 797 EXPORT_SYMBOL(scsi_is_sas_phy);
 798
 799 /*
 800  * SAS Port attributes
 801  */
 802 #define sas_port_show_simple(field, name, format_string, cast)          \
 803 static ssize_t                                                          \
 804 show_sas_port_##name(struct device *dev,                                \
 805                      struct device_attribute *attr, char *buf)          \
 806 {                                                                       \
 807         struct sas_port *port = transport_class_to_sas_port(dev);       \
 808                                                                         \
 809         return snprintf(buf, 20, format_string, cast port->field);      \
 810 }
 811
 812 #define sas_port_simple_attr(field, name, format_string, type)          \
 813         sas_port_show_simple(field, name, format_string, (type))        \
 814 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 815
 816 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 817
 818 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 819                                "sas_port", NULL, NULL, NULL);
 820
 821 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 822 {
 823         struct Scsi_Host *shost;
 824         struct sas_internal *i;
 825
 826         if (!scsi_is_sas_port(dev))
 827                 return 0;
 828         shost = dev_to_shost(dev->parent);
 829
 830         if (!shost->transportt)
 831                 return 0;
 832         if (shost->transportt->host_attrs.ac.class !=
 833                         &sas_host_class.class)
 834                 return 0;
 835
 836         i = to_sas_internal(shost->transportt);
 837         return &i->port_attr_cont.ac == cont;
 838 }
 839
 840
 841 static void sas_port_release(struct device *dev)
 842 {
 843         struct sas_port *port = dev_to_sas_port(dev);
 844
 845         BUG_ON(!list_empty(&port->phy_list));
 846
 847         put_device(dev->parent);
 848         kfree(port);
 849 }
 850
 851 static void sas_port_create_link(struct sas_port *port,
 852                                  struct sas_phy *phy)
 853 {
 854         int res;
 855
 856         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 857                                 dev_name(&phy->dev));
 858         if (res)
 859                 goto err;
 860         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 861         if (res)
 862                 goto err;
 863         return;
 864 err:
 865         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 866                __func__, res);
 867 }
 868
 869 static void sas_port_delete_link(struct sas_port *port,
 870                                  struct sas_phy *phy)
 871 {
 872         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 873         sysfs_remove_link(&phy->dev.kobj, "port");
 874 }
 875
 876 /** sas_port_alloc - allocate and initialize a SAS port structure
 877  *
 878  * @parent:     parent device
 879  * @port_id:    port number
 880  *
 881  * Allocates a SAS port structure.  It will be added to the device tree
 882  * below the device specified by @parent which must be either a Scsi_Host
 883  * or a sas_expander_device.
 884  *
 885  * Returns %NULL on error
 886  */
 887 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 888 {
 889         struct Scsi_Host *shost = dev_to_shost(parent);
 890         struct sas_port *port;
 891
 892         port = kzalloc(sizeof(*port), GFP_KERNEL);
 893         if (!port)
 894                 return NULL;
 895
 896         port->port_identifier = port_id;
 897
 898         device_initialize(&port->dev);
 899
 900         port->dev.parent = get_device(parent);
 901         port->dev.release = sas_port_release;
 902
 903         mutex_init(&port->phy_list_mutex);
 904         INIT_LIST_HEAD(&port->phy_list);
 905
 906         if (scsi_is_sas_expander_device(parent)) {
 907                 struct sas_rphy *rphy = dev_to_rphy(parent);
 908                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 909                              rphy->scsi_target_id, port->port_identifier);
 910         } else
 911                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 912                              port->port_identifier);
 913
 914         transport_setup_device(&port->dev);
 915
 916         return port;
 917 }
 918 EXPORT_SYMBOL(sas_port_alloc);
 919
 920 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 921  *
 922  * @parent:     parent device
 923  *
 924  * Allocates a SAS port structure and a number to go with it.  This
 925  * interface is really for adapters where the port number has no
 926  * meansing, so the sas class should manage them.  It will be added to
 927  * the device tree below the device specified by @parent which must be
 928  * either a Scsi_Host or a sas_expander_device.
 929  *
 930  * Returns %NULL on error
 931  */
 932 struct sas_port *sas_port_alloc_num(struct device *parent)
 933 {
 934         int index;
 935         struct Scsi_Host *shost = dev_to_shost(parent);
 936         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 937
 938         /* FIXME: use idr for this eventually */
 939         mutex_lock(&sas_host->lock);
 940         if (scsi_is_sas_expander_device(parent)) {
 941                 struct sas_rphy *rphy = dev_to_rphy(parent);
 942                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 943
 944                 index = exp->next_port_id++;
 945         } else
 946                 index = sas_host->next_port_id++;
 947         mutex_unlock(&sas_host->lock);
 948         return sas_port_alloc(parent, index);
 949 }
 950 EXPORT_SYMBOL(sas_port_alloc_num);
 951
 952 /**
 953  * sas_port_add - add a SAS port to the device hierarchy
 954  * @port:       port to be added
 955  *
 956  * publishes a port to the rest of the system
 957  */
 958 int sas_port_add(struct sas_port *port)
 959 {
 960         int error;
 961
 962         /* No phys should be added until this is made visible */
 963         BUG_ON(!list_empty(&port->phy_list));
 964
 965         error = device_add(&port->dev);
 966
 967         if (error)
 968                 return error;
 969
 970         transport_add_device(&port->dev);
 971         transport_configure_device(&port->dev);
 972
 973         return 0;
 974 }
 975 EXPORT_SYMBOL(sas_port_add);
 976
 977 /**
 978  * sas_port_free  -  free a SAS PORT
 979  * @port:       SAS PORT to free
 980  *
 981  * Frees the specified SAS PORT.
 982  *
 983  * Note:
 984  *   This function must only be called on a PORT that has not
 985  *   successfully been added using sas_port_add().
 986  */
 987 void sas_port_free(struct sas_port *port)
 988 {
 989         transport_destroy_device(&port->dev);
 990         put_device(&port->dev);
 991 }
 992 EXPORT_SYMBOL(sas_port_free);
 993
 994 /**
 995  * sas_port_delete  -  remove SAS PORT
 996  * @port:       SAS PORT to remove
 997  *
 998  * Removes the specified SAS PORT.  If the SAS PORT has an
 999  * associated phys, unlink them from the port as well.
1000  */
1001 void sas_port_delete(struct sas_port *port)
1002 {
1003         struct device *dev = &port->dev;
1004         struct sas_phy *phy, *tmp_phy;
1005
1006         if (port->rphy) {
1007                 sas_rphy_delete(port->rphy);
1008                 port->rphy = NULL;
1009         }
1010
1011         mutex_lock(&port->phy_list_mutex);
1012         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1013                                  port_siblings) {
1014                 sas_port_delete_link(port, phy);
1015                 list_del_init(&phy->port_siblings);
1016         }
1017         mutex_unlock(&port->phy_list_mutex);
1018
1019         if (port->is_backlink) {
1020                 struct device *parent = port->dev.parent;
1021
1022                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1023                 port->is_backlink = 0;
1024         }
1025
1026         transport_remove_device(dev);
1027         device_del(dev);
1028         transport_destroy_device(dev);
1029         put_device(dev);
1030 }
1031 EXPORT_SYMBOL(sas_port_delete);
1032
1033 /**
1034  * scsi_is_sas_port -  check if a struct device represents a SAS port
1035  * @dev:        device to check
1036  *
1037  * Returns:
1038  *      %1 if the device represents a SAS Port, %0 else
1039  */
1040 int scsi_is_sas_port(const struct device *dev)
1041 {
1042         return dev->release == sas_port_release;
1043 }
1044 EXPORT_SYMBOL(scsi_is_sas_port);
1045
1046 /**
1047  * sas_port_add_phy - add another phy to a port to form a wide port
1048  * @port:       port to add the phy to
1049  * @phy:        phy to add
1050  *
1051  * When a port is initially created, it is empty (has no phys).  All
1052  * ports must have at least one phy to operated, and all wide ports
1053  * must have at least two.  The current code makes no difference
1054  * between ports and wide ports, but the only object that can be
1055  * connected to a remote device is a port, so ports must be formed on
1056  * all devices with phys if they're connected to anything.
1057  */
1058 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1059 {
1060         mutex_lock(&port->phy_list_mutex);
1061         if (unlikely(!list_empty(&phy->port_siblings))) {
1062                 /* make sure we're already on this port */
1063                 struct sas_phy *tmp;
1064
1065                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1066                         if (tmp == phy)
1067                                 break;
1068                 /* If this trips, you added a phy that was already
1069                  * part of a different port */
1070                 if (unlikely(tmp != phy)) {
1071                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1072                                    dev_name(&phy->dev));
1073                         BUG();
1074                 }
1075         } else {
1076                 sas_port_create_link(port, phy);
1077                 list_add_tail(&phy->port_siblings, &port->phy_list);
1078                 port->num_phys++;
1079         }
1080         mutex_unlock(&port->phy_list_mutex);
1081 }
1082 EXPORT_SYMBOL(sas_port_add_phy);
1083
1084 /**
1085  * sas_port_delete_phy - remove a phy from a port or wide port
1086  * @port:       port to remove the phy from
1087  * @phy:        phy to remove
1088  *
1089  * This operation is used for tearing down ports again.  It must be
1090  * done to every port or wide port before calling sas_port_delete.
1091  */
1092 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1093 {
1094         mutex_lock(&port->phy_list_mutex);
1095         sas_port_delete_link(port, phy);
1096         list_del_init(&phy->port_siblings);
1097         port->num_phys--;
1098         mutex_unlock(&port->phy_list_mutex);
1099 }
1100 EXPORT_SYMBOL(sas_port_delete_phy);
1101
1102 void sas_port_mark_backlink(struct sas_port *port)
1103 {
1104         int res;
1105         struct device *parent = port->dev.parent->parent->parent;
1106
1107         if (port->is_backlink)
1108                 return;
1109         port->is_backlink = 1;
1110         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1111                                 dev_name(parent));
1112         if (res)
1113                 goto err;
1114         return;
1115 err:
1116         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1117                __func__, res);
1118
1119 }
1120 EXPORT_SYMBOL(sas_port_mark_backlink);
1121
1122 /*
1123  * SAS remote PHY attributes.
1124  */
1125
1126 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1127 static ssize_t                                                          \
1128 show_sas_rphy_##name(struct device *dev,                                \
1129                      struct device_attribute *attr, char *buf)          \
1130 {                                                                       \
1131         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1132                                                                         \
1133         return snprintf(buf, 20, format_string, cast rphy->field);      \
1134 }
1135
1136 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1137         sas_rphy_show_simple(field, name, format_string, (type))        \
1138 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1139                 show_sas_rphy_##name, NULL)
1140
1141 #define sas_rphy_show_protocol(field, name)                             \
1142 static ssize_t                                                          \
1143 show_sas_rphy_##name(struct device *dev,                                \
1144                      struct device_attribute *attr, char *buf)          \
1145 {                                                                       \
1146         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1147                                                                         \
1148         if (!rphy->field)                                       \
1149                 return snprintf(buf, 20, "none\n");                     \
1150         return get_sas_protocol_names(rphy->field, buf);        \
1151 }
1152
1153 #define sas_rphy_protocol_attr(field, name)                             \
1154         sas_rphy_show_protocol(field, name)                             \
1155 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1156                 show_sas_rphy_##name, NULL)
1157
1158 static ssize_t
1159 show_sas_rphy_device_type(struct device *dev,
1160                           struct device_attribute *attr, char *buf)
1161 {
1162         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1163
1164         if (!rphy->identify.device_type)
1165                 return snprintf(buf, 20, "none\n");
1166         return get_sas_device_type_names(
1167                         rphy->identify.device_type, buf);
1168 }
1169
1170 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1171                 show_sas_rphy_device_type, NULL);
1172
1173 static ssize_t
1174 show_sas_rphy_enclosure_identifier(struct device *dev,
1175                                    struct device_attribute *attr, char *buf)
1176 {
1177         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1178         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1179         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1180         struct sas_internal *i = to_sas_internal(shost->transportt);
1181         u64 identifier;
1182         int error;
1183
1184         /*
1185          * Only devices behind an expander are supported, because the
1186          * enclosure identifier is a SMP feature.
1187          */
1188         if (scsi_is_sas_phy_local(phy))
1189                 return -EINVAL;
1190
1191         error = i->f->get_enclosure_identifier(rphy, &identifier);
1192         if (error)
1193                 return error;
1194         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1195 }
1196
1197 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1198                 show_sas_rphy_enclosure_identifier, NULL);
1199
1200 static ssize_t
1201 show_sas_rphy_bay_identifier(struct device *dev,
1202                              struct device_attribute *attr, char *buf)
1203 {
1204         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1205         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1206         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1207         struct sas_internal *i = to_sas_internal(shost->transportt);
1208         int val;
1209
1210         if (scsi_is_sas_phy_local(phy))
1211                 return -EINVAL;
1212
1213         val = i->f->get_bay_identifier(rphy);
1214         if (val < 0)
1215                 return val;
1216         return sprintf(buf, "%d\n", val);
1217 }
1218
1219 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1220                 show_sas_rphy_bay_identifier, NULL);
1221
1222 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1223                 initiator_port_protocols);
1224 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1225 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1226                 unsigned long long);
1227 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1228
1229 /* only need 8 bytes of data plus header (4 or 8) */
1230 #define BUF_SIZE 64
1231
1232 int sas_read_port_mode_page(struct scsi_device *sdev)
1233 {
1234         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1235         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1236         struct scsi_mode_data mode_data;
1237         int res, error;
1238
1239         if (!buffer)
1240                 return -ENOMEM;
1241
1242         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1243                               &mode_data, NULL);
1244
1245         error = -EINVAL;
1246         if (!scsi_status_is_good(res))
1247                 goto out;
1248
1249         msdata = buffer +  mode_data.header_length +
1250                 mode_data.block_descriptor_length;
1251
1252         if (msdata - buffer > BUF_SIZE - 8)
1253                 goto out;
1254
1255         error = 0;
1256
1257         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1258         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1259         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1260
1261  out:
1262         kfree(buffer);
1263         return error;
1264 }
1265 EXPORT_SYMBOL(sas_read_port_mode_page);
1266
1267 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1268                                "sas_end_device", NULL, NULL, NULL);
1269
1270 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1271 static ssize_t                                                          \
1272 show_sas_end_dev_##name(struct device *dev,                             \
1273                         struct device_attribute *attr, char *buf)       \
1274 {                                                                       \
1275         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1276         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1277                                                                         \
1278         return snprintf(buf, 20, format_string, cast rdev->field);      \
1279 }
1280
1281 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1282         sas_end_dev_show_simple(field, name, format_string, (type))     \
1283 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1284                 show_sas_end_dev_##name, NULL)
1285
1286 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1287 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1288                         "%d\n", int);
1289 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1290                         "%d\n", int);
1291 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1292                         "%d\n", int);
1293 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1294                         "%d\n", int);
1295
1296 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1297                                "sas_expander", NULL, NULL, NULL);
1298
1299 #define sas_expander_show_simple(field, name, format_string, cast)      \
1300 static ssize_t                                                          \
1301 show_sas_expander_##name(struct device *dev,                            \
1302                          struct device_attribute *attr, char *buf)      \
1303 {                                                                       \
1304         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1305         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1306                                                                         \
1307         return snprintf(buf, 20, format_string, cast edev->field);      \
1308 }
1309
1310 #define sas_expander_simple_attr(field, name, format_string, type)      \
1311         sas_expander_show_simple(field, name, format_string, (type))    \
1312 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1313                 show_sas_expander_##name, NULL)
1314
1315 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1316 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1317 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1318 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1319                          "%s\n", char *);
1320 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1321 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1322                          unsigned int);
1323 sas_expander_simple_attr(level, level, "%d\n", int);
1324
1325 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1326                 "sas_device", NULL, NULL, NULL);
1327
1328 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1329 {
1330         struct Scsi_Host *shost;
1331         struct sas_internal *i;
1332
1333         if (!scsi_is_sas_rphy(dev))
1334                 return 0;
1335         shost = dev_to_shost(dev->parent->parent);
1336
1337         if (!shost->transportt)
1338                 return 0;
1339         if (shost->transportt->host_attrs.ac.class !=
1340                         &sas_host_class.class)
1341                 return 0;
1342
1343         i = to_sas_internal(shost->transportt);
1344         return &i->rphy_attr_cont.ac == cont;
1345 }
1346
1347 static int sas_end_dev_match(struct attribute_container *cont,
1348                              struct device *dev)
1349 {
1350         struct Scsi_Host *shost;
1351         struct sas_internal *i;
1352         struct sas_rphy *rphy;
1353
1354         if (!scsi_is_sas_rphy(dev))
1355                 return 0;
1356         shost = dev_to_shost(dev->parent->parent);
1357         rphy = dev_to_rphy(dev);
1358
1359         if (!shost->transportt)
1360                 return 0;
1361         if (shost->transportt->host_attrs.ac.class !=
1362                         &sas_host_class.class)
1363                 return 0;
1364
1365         i = to_sas_internal(shost->transportt);
1366         return &i->end_dev_attr_cont.ac == cont &&
1367                 rphy->identify.device_type == SAS_END_DEVICE;
1368 }
1369
1370 static int sas_expander_match(struct attribute_container *cont,
1371                               struct device *dev)
1372 {
1373         struct Scsi_Host *shost;
1374         struct sas_internal *i;
1375         struct sas_rphy *rphy;
1376
1377         if (!scsi_is_sas_rphy(dev))
1378                 return 0;
1379         shost = dev_to_shost(dev->parent->parent);
1380         rphy = dev_to_rphy(dev);
1381
1382         if (!shost->transportt)
1383                 return 0;
1384         if (shost->transportt->host_attrs.ac.class !=
1385                         &sas_host_class.class)
1386                 return 0;
1387
1388         i = to_sas_internal(shost->transportt);
1389         return &i->expander_attr_cont.ac == cont &&
1390                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1391                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1392 }
1393
1394 static void sas_expander_release(struct device *dev)
1395 {
1396         struct sas_rphy *rphy = dev_to_rphy(dev);
1397         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1398
1399         if (rphy->q)
1400                 blk_cleanup_queue(rphy->q);
1401
1402         put_device(dev->parent);
1403         kfree(edev);
1404 }
1405
1406 static void sas_end_device_release(struct device *dev)
1407 {
1408         struct sas_rphy *rphy = dev_to_rphy(dev);
1409         struct sas_end_device *edev = rphy_to_end_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 /**
1419  * sas_rphy_initialize - common rphy intialization
1420  * @rphy:       rphy to initialise
1421  *
1422  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1423  * initialise the common rphy component of each.
1424  */
1425 static void sas_rphy_initialize(struct sas_rphy *rphy)
1426 {
1427         INIT_LIST_HEAD(&rphy->list);
1428 }
1429
1430 /**
1431  * sas_end_device_alloc - allocate an rphy for an end device
1432  * @parent: which port
1433  *
1434  * Allocates an SAS remote PHY structure, connected to @parent.
1435  *
1436  * Returns:
1437  *      SAS PHY allocated or %NULL if the allocation failed.
1438  */
1439 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1440 {
1441         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1442         struct sas_end_device *rdev;
1443
1444         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1445         if (!rdev) {
1446                 return NULL;
1447         }
1448
1449         device_initialize(&rdev->rphy.dev);
1450         rdev->rphy.dev.parent = get_device(&parent->dev);
1451         rdev->rphy.dev.release = sas_end_device_release;
1452         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1453                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1454                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1455                              shost->host_no, rphy->scsi_target_id,
1456                              parent->port_identifier);
1457         } else
1458                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1459                              shost->host_no, parent->port_identifier);
1460         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1461         sas_rphy_initialize(&rdev->rphy);
1462         transport_setup_device(&rdev->rphy.dev);
1463
1464         return &rdev->rphy;
1465 }
1466 EXPORT_SYMBOL(sas_end_device_alloc);
1467
1468 /**
1469  * sas_expander_alloc - allocate an rphy for an end device
1470  * @parent: which port
1471  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1472  *
1473  * Allocates an SAS remote PHY structure, connected to @parent.
1474  *
1475  * Returns:
1476  *      SAS PHY allocated or %NULL if the allocation failed.
1477  */
1478 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1479                                     enum sas_device_type type)
1480 {
1481         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1482         struct sas_expander_device *rdev;
1483         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1484
1485         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1486                type != SAS_FANOUT_EXPANDER_DEVICE);
1487
1488         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1489         if (!rdev) {
1490                 return NULL;
1491         }
1492
1493         device_initialize(&rdev->rphy.dev);
1494         rdev->rphy.dev.parent = get_device(&parent->dev);
1495         rdev->rphy.dev.release = sas_expander_release;
1496         mutex_lock(&sas_host->lock);
1497         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1498         mutex_unlock(&sas_host->lock);
1499         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1500                      shost->host_no, rdev->rphy.scsi_target_id);
1501         rdev->rphy.identify.device_type = type;
1502         sas_rphy_initialize(&rdev->rphy);
1503         transport_setup_device(&rdev->rphy.dev);
1504
1505         return &rdev->rphy;
1506 }
1507 EXPORT_SYMBOL(sas_expander_alloc);
1508
1509 /**
1510  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1511  * @rphy:       The remote PHY to be added
1512  *
1513  * Publishes a SAS remote PHY to the rest of the system.
1514  */
1515 int sas_rphy_add(struct sas_rphy *rphy)
1516 {
1517         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1518         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1519         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1520         struct sas_identify *identify = &rphy->identify;
1521         int error;
1522
1523         if (parent->rphy)
1524                 return -ENXIO;
1525         parent->rphy = rphy;
1526
1527         error = device_add(&rphy->dev);
1528         if (error)
1529                 return error;
1530         transport_add_device(&rphy->dev);
1531         transport_configure_device(&rphy->dev);
1532         if (sas_bsg_initialize(shost, rphy))
1533                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1534
1535
1536         mutex_lock(&sas_host->lock);
1537         list_add_tail(&rphy->list, &sas_host->rphy_list);
1538         if (identify->device_type == SAS_END_DEVICE &&
1539             (identify->target_port_protocols &
1540              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1541                 rphy->scsi_target_id = sas_host->next_target_id++;
1542         else if (identify->device_type == SAS_END_DEVICE)
1543                 rphy->scsi_target_id = -1;
1544         mutex_unlock(&sas_host->lock);
1545
1546         if (identify->device_type == SAS_END_DEVICE &&
1547             rphy->scsi_target_id != -1) {
1548                 int lun;
1549
1550                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1551                         lun = SCAN_WILD_CARD;
1552                 else
1553                         lun = 0;
1554
1555                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
1556         }
1557
1558         return 0;
1559 }
1560 EXPORT_SYMBOL(sas_rphy_add);
1561
1562 /**
1563  * sas_rphy_free  -  free a SAS remote PHY
1564  * @rphy: SAS remote PHY to free
1565  *
1566  * Frees the specified SAS remote PHY.
1567  *
1568  * Note:
1569  *   This function must only be called on a remote
1570  *   PHY that has not successfully been added using
1571  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1572  */
1573 void sas_rphy_free(struct sas_rphy *rphy)
1574 {
1575         struct device *dev = &rphy->dev;
1576         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1577         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1578
1579         mutex_lock(&sas_host->lock);
1580         list_del(&rphy->list);
1581         mutex_unlock(&sas_host->lock);
1582
1583         sas_bsg_remove(shost, rphy);
1584
1585         transport_destroy_device(dev);
1586
1587         put_device(dev);
1588 }
1589 EXPORT_SYMBOL(sas_rphy_free);
1590
1591 /**
1592  * sas_rphy_delete  -  remove and free SAS remote PHY
1593  * @rphy:       SAS remote PHY to remove and free
1594  *
1595  * Removes the specified SAS remote PHY and frees it.
1596  */
1597 void
1598 sas_rphy_delete(struct sas_rphy *rphy)
1599 {
1600         sas_rphy_remove(rphy);
1601         sas_rphy_free(rphy);
1602 }
1603 EXPORT_SYMBOL(sas_rphy_delete);
1604
1605 /**
1606  * sas_rphy_remove  -  remove SAS remote PHY
1607  * @rphy:       SAS remote phy to remove
1608  *
1609  * Removes the specified SAS remote PHY.
1610  */
1611 void
1612 sas_rphy_remove(struct sas_rphy *rphy)
1613 {
1614         struct device *dev = &rphy->dev;
1615         struct sas_port *parent = dev_to_sas_port(dev->parent);
1616
1617         switch (rphy->identify.device_type) {
1618         case SAS_END_DEVICE:
1619                 scsi_remove_target(dev);
1620                 break;
1621         case SAS_EDGE_EXPANDER_DEVICE:
1622         case SAS_FANOUT_EXPANDER_DEVICE:
1623                 sas_remove_children(dev);
1624                 break;
1625         default:
1626                 break;
1627         }
1628
1629         transport_remove_device(dev);
1630         device_del(dev);
1631
1632         parent->rphy = NULL;
1633 }
1634 EXPORT_SYMBOL(sas_rphy_remove);
1635
1636 /**
1637  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1638  * @dev:        device to check
1639  *
1640  * Returns:
1641  *      %1 if the device represents a SAS remote PHY, %0 else
1642  */
1643 int scsi_is_sas_rphy(const struct device *dev)
1644 {
1645         return dev->release == sas_end_device_release ||
1646                 dev->release == sas_expander_release;
1647 }
1648 EXPORT_SYMBOL(scsi_is_sas_rphy);
1649
1650
1651 /*
1652  * SCSI scan helper
1653  */
1654
1655 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1656                 uint id, uint lun)
1657 {
1658         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1659         struct sas_rphy *rphy;
1660
1661         mutex_lock(&sas_host->lock);
1662         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1663                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1664                     rphy->scsi_target_id == -1)
1665                         continue;
1666
1667                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1668                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1669                         scsi_scan_target(&rphy->dev, 0,
1670                                          rphy->scsi_target_id, lun, 1);
1671                 }
1672         }
1673         mutex_unlock(&sas_host->lock);
1674
1675         return 0;
1676 }
1677
1678
1679 /*
1680  * Setup / Teardown code
1681  */
1682
1683 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1684         i->private_##attrb[count] = dev_attr_##field;           \
1685         i->private_##attrb[count].attr.mode = perm;                     \
1686         i->attrb[count] = &i->private_##attrb[count];                   \
1687         if (test)                                                       \
1688                 count++
1689
1690 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1691         i->private_##attrb[count] = dev_attr_##field;           \
1692         i->private_##attrb[count].attr.mode = perm;                     \
1693         if (ro_test) {                                                  \
1694                 i->private_##attrb[count].attr.mode = ro_perm;          \
1695                 i->private_##attrb[count].store = NULL;                 \
1696         }                                                               \
1697         i->attrb[count] = &i->private_##attrb[count];                   \
1698         if (test)                                                       \
1699                 count++
1700
1701 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1702         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1703
1704 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1705         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1706
1707 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1708         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1709
1710 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1711         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1712                         !i->f->set_phy_speed, S_IRUGO)
1713
1714 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1715         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1716                           !i->f->func, S_IRUGO)
1717
1718 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1719         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1720
1721 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1722         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1723
1724 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1725         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1726
1727 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1728         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1729
1730 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1731         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1732
1733 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1734         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1735
1736 /**
1737  * sas_attach_transport  -  instantiate SAS transport template
1738  * @ft:         SAS transport class function template
1739  */
1740 struct scsi_transport_template *
1741 sas_attach_transport(struct sas_function_template *ft)
1742 {
1743         struct sas_internal *i;
1744         int count;
1745
1746         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1747         if (!i)
1748                 return NULL;
1749
1750         i->t.user_scan = sas_user_scan;
1751
1752         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1753         i->t.host_attrs.ac.class = &sas_host_class.class;
1754         i->t.host_attrs.ac.match = sas_host_match;
1755         transport_container_register(&i->t.host_attrs);
1756         i->t.host_size = sizeof(struct sas_host_attrs);
1757
1758         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1759         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1760         i->phy_attr_cont.ac.match = sas_phy_match;
1761         transport_container_register(&i->phy_attr_cont);
1762
1763         i->port_attr_cont.ac.class = &sas_port_class.class;
1764         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1765         i->port_attr_cont.ac.match = sas_port_match;
1766         transport_container_register(&i->port_attr_cont);
1767
1768         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1769         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1770         i->rphy_attr_cont.ac.match = sas_rphy_match;
1771         transport_container_register(&i->rphy_attr_cont);
1772
1773         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1774         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1775         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1776         transport_container_register(&i->end_dev_attr_cont);
1777
1778         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1779         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1780         i->expander_attr_cont.ac.match = sas_expander_match;
1781         transport_container_register(&i->expander_attr_cont);
1782
1783         i->f = ft;
1784
1785         count = 0;
1786         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1787         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1788         SETUP_PHY_ATTRIBUTE(device_type);
1789         SETUP_PHY_ATTRIBUTE(sas_address);
1790         SETUP_PHY_ATTRIBUTE(phy_identifier);
1791         //SETUP_PHY_ATTRIBUTE(port_identifier);
1792         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1793         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1794         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1795         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1796         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1797
1798         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1799         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1800         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1801         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1802         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1803         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1804         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1805         i->phy_attrs[count] = NULL;
1806
1807         count = 0;
1808         SETUP_PORT_ATTRIBUTE(num_phys);
1809         i->port_attrs[count] = NULL;
1810
1811         count = 0;
1812         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1813         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1814         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1815         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1816         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1817         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1818                                        get_enclosure_identifier);
1819         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1820                                        get_bay_identifier);
1821         i->rphy_attrs[count] = NULL;
1822
1823         count = 0;
1824         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1825         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1826         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1827         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1828         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1829         i->end_dev_attrs[count] = NULL;
1830
1831         count = 0;
1832         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1833         SETUP_EXPANDER_ATTRIBUTE(product_id);
1834         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1835         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1836         SETUP_EXPANDER_ATTRIBUTE(component_id);
1837         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1838         SETUP_EXPANDER_ATTRIBUTE(level);
1839         i->expander_attrs[count] = NULL;
1840
1841         return &i->t;
1842 }
1843 EXPORT_SYMBOL(sas_attach_transport);
1844
1845 /**
1846  * sas_release_transport  -  release SAS transport template instance
1847  * @t:          transport template instance
1848  */
1849 void sas_release_transport(struct scsi_transport_template *t)
1850 {
1851         struct sas_internal *i = to_sas_internal(t);
1852
1853         transport_container_unregister(&i->t.host_attrs);
1854         transport_container_unregister(&i->phy_attr_cont);
1855         transport_container_unregister(&i->port_attr_cont);
1856         transport_container_unregister(&i->rphy_attr_cont);
1857         transport_container_unregister(&i->end_dev_attr_cont);
1858         transport_container_unregister(&i->expander_attr_cont);
1859
1860         kfree(i);
1861 }
1862 EXPORT_SYMBOL(sas_release_transport);
1863
1864 static __init int sas_transport_init(void)
1865 {
1866         int error;
1867
1868         error = transport_class_register(&sas_host_class);
1869         if (error)
1870                 goto out;
1871         error = transport_class_register(&sas_phy_class);
1872         if (error)
1873                 goto out_unregister_transport;
1874         error = transport_class_register(&sas_port_class);
1875         if (error)
1876                 goto out_unregister_phy;
1877         error = transport_class_register(&sas_rphy_class);
1878         if (error)
1879                 goto out_unregister_port;
1880         error = transport_class_register(&sas_end_dev_class);
1881         if (error)
1882                 goto out_unregister_rphy;
1883         error = transport_class_register(&sas_expander_class);
1884         if (error)
1885                 goto out_unregister_end_dev;
1886
1887         return 0;
1888
1889  out_unregister_end_dev:
1890         transport_class_unregister(&sas_end_dev_class);
1891  out_unregister_rphy:
1892         transport_class_unregister(&sas_rphy_class);
1893  out_unregister_port:
1894         transport_class_unregister(&sas_port_class);
1895  out_unregister_phy:
1896         transport_class_unregister(&sas_phy_class);
1897  out_unregister_transport:
1898         transport_class_unregister(&sas_host_class);
1899  out:
1900         return error;
1901
1902 }
1903
1904 static void __exit sas_transport_exit(void)
1905 {
1906         transport_class_unregister(&sas_host_class);
1907         transport_class_unregister(&sas_phy_class);
1908         transport_class_unregister(&sas_port_class);
1909         transport_class_unregister(&sas_rphy_class);
1910         transport_class_unregister(&sas_end_dev_class);
1911         transport_class_unregister(&sas_expander_class);
1912 }
1913
1914 MODULE_AUTHOR("Christoph Hellwig");
1915 MODULE_DESCRIPTION("SAS Transport Attributes");
1916 MODULE_LICENSE("GPL");
1917
1918 module_init(sas_transport_init);
1919 module_exit(sas_transport_exit);