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 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 656                          struct device *cdev)
 657 {
 658         struct sas_phy *phy = dev_to_phy(dev);
 659         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 660         struct sas_internal *i = to_sas_internal(shost->transportt);
 661
 662         if (i->f->phy_setup)
 663                 i->f->phy_setup(phy);
 664
 665         return 0;
 666 }
 667
 668 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 669                 "sas_phy", sas_phy_setup, NULL, NULL);
 670
 671 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 672 {
 673         struct Scsi_Host *shost;
 674         struct sas_internal *i;
 675
 676         if (!scsi_is_sas_phy(dev))
 677                 return 0;
 678         shost = dev_to_shost(dev->parent);
 679
 680         if (!shost->transportt)
 681                 return 0;
 682         if (shost->transportt->host_attrs.ac.class !=
 683                         &sas_host_class.class)
 684                 return 0;
 685
 686         i = to_sas_internal(shost->transportt);
 687         return &i->phy_attr_cont.ac == cont;
 688 }
 689
 690 static void sas_phy_release(struct device *dev)
 691 {
 692         struct sas_phy *phy = dev_to_phy(dev);
 693         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 694         struct sas_internal *i = to_sas_internal(shost->transportt);
 695
 696         if (i->f->phy_release)
 697                 i->f->phy_release(phy);
 698         put_device(dev->parent);
 699         kfree(phy);
 700 }
 701
 702 /**
 703  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 704  * @parent:     Parent device
 705  * @number:     Phy index
 706  *
 707  * Allocates an SAS PHY structure.  It will be added in the device tree
 708  * below the device specified by @parent, which has to be either a Scsi_Host
 709  * or sas_rphy.
 710  *
 711  * Returns:
 712  *      SAS PHY allocated or %NULL if the allocation failed.
 713  */
 714 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 715 {
 716         struct Scsi_Host *shost = dev_to_shost(parent);
 717         struct sas_phy *phy;
 718
 719         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 720         if (!phy)
 721                 return NULL;
 722
 723         phy->number = number;
 724         phy->enabled = 1;
 725
 726         device_initialize(&phy->dev);
 727         phy->dev.parent = get_device(parent);
 728         phy->dev.release = sas_phy_release;
 729         INIT_LIST_HEAD(&phy->port_siblings);
 730         if (scsi_is_sas_expander_device(parent)) {
 731                 struct sas_rphy *rphy = dev_to_rphy(parent);
 732                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 733                         rphy->scsi_target_id, number);
 734         } else
 735                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 736
 737         transport_setup_device(&phy->dev);
 738
 739         return phy;
 740 }
 741 EXPORT_SYMBOL(sas_phy_alloc);
 742
 743 /**
 744  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 745  * @phy:        The PHY to be added
 746  *
 747  * Publishes a SAS PHY to the rest of the system.
 748  */
 749 int sas_phy_add(struct sas_phy *phy)
 750 {
 751         int error;
 752
 753         error = device_add(&phy->dev);
 754         if (!error) {
 755                 transport_add_device(&phy->dev);
 756                 transport_configure_device(&phy->dev);
 757         }
 758
 759         return error;
 760 }
 761 EXPORT_SYMBOL(sas_phy_add);
 762
 763 /**
 764  * sas_phy_free  -  free a SAS PHY
 765  * @phy:        SAS PHY to free
 766  *
 767  * Frees the specified SAS PHY.
 768  *
 769  * Note:
 770  *   This function must only be called on a PHY that has not
 771  *   successfully been added using sas_phy_add().
 772  */
 773 void sas_phy_free(struct sas_phy *phy)
 774 {
 775         transport_destroy_device(&phy->dev);
 776         put_device(&phy->dev);
 777 }
 778 EXPORT_SYMBOL(sas_phy_free);
 779
 780 /**
 781  * sas_phy_delete  -  remove SAS PHY
 782  * @phy:        SAS PHY to remove
 783  *
 784  * Removes the specified SAS PHY.  If the SAS PHY has an
 785  * associated remote PHY it is removed before.
 786  */
 787 void
 788 sas_phy_delete(struct sas_phy *phy)
 789 {
 790         struct device *dev = &phy->dev;
 791
 792         /* this happens if the phy is still part of a port when deleted */
 793         BUG_ON(!list_empty(&phy->port_siblings));
 794
 795         transport_remove_device(dev);
 796         device_del(dev);
 797         transport_destroy_device(dev);
 798         put_device(dev);
 799 }
 800 EXPORT_SYMBOL(sas_phy_delete);
 801
 802 /**
 803  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 804  * @dev:        device to check
 805  *
 806  * Returns:
 807  *      %1 if the device represents a SAS PHY, %0 else
 808  */
 809 int scsi_is_sas_phy(const struct device *dev)
 810 {
 811         return dev->release == sas_phy_release;
 812 }
 813 EXPORT_SYMBOL(scsi_is_sas_phy);
 814
 815 /*
 816  * SAS Port attributes
 817  */
 818 #define sas_port_show_simple(field, name, format_string, cast)          \
 819 static ssize_t                                                          \
 820 show_sas_port_##name(struct device *dev,                                \
 821                      struct device_attribute *attr, char *buf)          \
 822 {                                                                       \
 823         struct sas_port *port = transport_class_to_sas_port(dev);       \
 824                                                                         \
 825         return snprintf(buf, 20, format_string, cast port->field);      \
 826 }
 827
 828 #define sas_port_simple_attr(field, name, format_string, type)          \
 829         sas_port_show_simple(field, name, format_string, (type))        \
 830 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 831
 832 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 833
 834 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 835                                "sas_port", NULL, NULL, NULL);
 836
 837 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 838 {
 839         struct Scsi_Host *shost;
 840         struct sas_internal *i;
 841
 842         if (!scsi_is_sas_port(dev))
 843                 return 0;
 844         shost = dev_to_shost(dev->parent);
 845
 846         if (!shost->transportt)
 847                 return 0;
 848         if (shost->transportt->host_attrs.ac.class !=
 849                         &sas_host_class.class)
 850                 return 0;
 851
 852         i = to_sas_internal(shost->transportt);
 853         return &i->port_attr_cont.ac == cont;
 854 }
 855
 856
 857 static void sas_port_release(struct device *dev)
 858 {
 859         struct sas_port *port = dev_to_sas_port(dev);
 860
 861         BUG_ON(!list_empty(&port->phy_list));
 862
 863         put_device(dev->parent);
 864         kfree(port);
 865 }
 866
 867 static void sas_port_create_link(struct sas_port *port,
 868                                  struct sas_phy *phy)
 869 {
 870         int res;
 871
 872         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 873                                 dev_name(&phy->dev));
 874         if (res)
 875                 goto err;
 876         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 877         if (res)
 878                 goto err;
 879         return;
 880 err:
 881         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 882                __func__, res);
 883 }
 884
 885 static void sas_port_delete_link(struct sas_port *port,
 886                                  struct sas_phy *phy)
 887 {
 888         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 889         sysfs_remove_link(&phy->dev.kobj, "port");
 890 }
 891
 892 /** sas_port_alloc - allocate and initialize a SAS port structure
 893  *
 894  * @parent:     parent device
 895  * @port_id:    port number
 896  *
 897  * Allocates a SAS port structure.  It will be added to the device tree
 898  * below the device specified by @parent which must be either a Scsi_Host
 899  * or a sas_expander_device.
 900  *
 901  * Returns %NULL on error
 902  */
 903 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 904 {
 905         struct Scsi_Host *shost = dev_to_shost(parent);
 906         struct sas_port *port;
 907
 908         port = kzalloc(sizeof(*port), GFP_KERNEL);
 909         if (!port)
 910                 return NULL;
 911
 912         port->port_identifier = port_id;
 913
 914         device_initialize(&port->dev);
 915
 916         port->dev.parent = get_device(parent);
 917         port->dev.release = sas_port_release;
 918
 919         mutex_init(&port->phy_list_mutex);
 920         INIT_LIST_HEAD(&port->phy_list);
 921
 922         if (scsi_is_sas_expander_device(parent)) {
 923                 struct sas_rphy *rphy = dev_to_rphy(parent);
 924                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 925                              rphy->scsi_target_id, port->port_identifier);
 926         } else
 927                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 928                              port->port_identifier);
 929
 930         transport_setup_device(&port->dev);
 931
 932         return port;
 933 }
 934 EXPORT_SYMBOL(sas_port_alloc);
 935
 936 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 937  *
 938  * @parent:     parent device
 939  *
 940  * Allocates a SAS port structure and a number to go with it.  This
 941  * interface is really for adapters where the port number has no
 942  * meansing, so the sas class should manage them.  It will be added to
 943  * the device tree below the device specified by @parent which must be
 944  * either a Scsi_Host or a sas_expander_device.
 945  *
 946  * Returns %NULL on error
 947  */
 948 struct sas_port *sas_port_alloc_num(struct device *parent)
 949 {
 950         int index;
 951         struct Scsi_Host *shost = dev_to_shost(parent);
 952         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 953
 954         /* FIXME: use idr for this eventually */
 955         mutex_lock(&sas_host->lock);
 956         if (scsi_is_sas_expander_device(parent)) {
 957                 struct sas_rphy *rphy = dev_to_rphy(parent);
 958                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 959
 960                 index = exp->next_port_id++;
 961         } else
 962                 index = sas_host->next_port_id++;
 963         mutex_unlock(&sas_host->lock);
 964         return sas_port_alloc(parent, index);
 965 }
 966 EXPORT_SYMBOL(sas_port_alloc_num);
 967
 968 /**
 969  * sas_port_add - add a SAS port to the device hierarchy
 970  * @port:       port to be added
 971  *
 972  * publishes a port to the rest of the system
 973  */
 974 int sas_port_add(struct sas_port *port)
 975 {
 976         int error;
 977
 978         /* No phys should be added until this is made visible */
 979         BUG_ON(!list_empty(&port->phy_list));
 980
 981         error = device_add(&port->dev);
 982
 983         if (error)
 984                 return error;
 985
 986         transport_add_device(&port->dev);
 987         transport_configure_device(&port->dev);
 988
 989         return 0;
 990 }
 991 EXPORT_SYMBOL(sas_port_add);
 992
 993 /**
 994  * sas_port_free  -  free a SAS PORT
 995  * @port:       SAS PORT to free
 996  *
 997  * Frees the specified SAS PORT.
 998  *
 999  * Note:
1000  *   This function must only be called on a PORT that has not
1001  *   successfully been added using sas_port_add().
1002  */
1003 void sas_port_free(struct sas_port *port)
1004 {
1005         transport_destroy_device(&port->dev);
1006         put_device(&port->dev);
1007 }
1008 EXPORT_SYMBOL(sas_port_free);
1009
1010 /**
1011  * sas_port_delete  -  remove SAS PORT
1012  * @port:       SAS PORT to remove
1013  *
1014  * Removes the specified SAS PORT.  If the SAS PORT has an
1015  * associated phys, unlink them from the port as well.
1016  */
1017 void sas_port_delete(struct sas_port *port)
1018 {
1019         struct device *dev = &port->dev;
1020         struct sas_phy *phy, *tmp_phy;
1021
1022         if (port->rphy) {
1023                 sas_rphy_delete(port->rphy);
1024                 port->rphy = NULL;
1025         }
1026
1027         mutex_lock(&port->phy_list_mutex);
1028         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1029                                  port_siblings) {
1030                 sas_port_delete_link(port, phy);
1031                 list_del_init(&phy->port_siblings);
1032         }
1033         mutex_unlock(&port->phy_list_mutex);
1034
1035         if (port->is_backlink) {
1036                 struct device *parent = port->dev.parent;
1037
1038                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1039                 port->is_backlink = 0;
1040         }
1041
1042         transport_remove_device(dev);
1043         device_del(dev);
1044         transport_destroy_device(dev);
1045         put_device(dev);
1046 }
1047 EXPORT_SYMBOL(sas_port_delete);
1048
1049 /**
1050  * scsi_is_sas_port -  check if a struct device represents a SAS port
1051  * @dev:        device to check
1052  *
1053  * Returns:
1054  *      %1 if the device represents a SAS Port, %0 else
1055  */
1056 int scsi_is_sas_port(const struct device *dev)
1057 {
1058         return dev->release == sas_port_release;
1059 }
1060 EXPORT_SYMBOL(scsi_is_sas_port);
1061
1062 /**
1063  * sas_port_get_phy - try to take a reference on a port member
1064  * @port: port to check
1065  */
1066 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1067 {
1068         struct sas_phy *phy;
1069
1070         mutex_lock(&port->phy_list_mutex);
1071         if (list_empty(&port->phy_list))
1072                 phy = NULL;
1073         else {
1074                 struct list_head *ent = port->phy_list.next;
1075
1076                 phy = list_entry(ent, typeof(*phy), port_siblings);
1077                 get_device(&phy->dev);
1078         }
1079         mutex_unlock(&port->phy_list_mutex);
1080
1081         return phy;
1082 }
1083 EXPORT_SYMBOL(sas_port_get_phy);
1084
1085 /**
1086  * sas_port_add_phy - add another phy to a port to form a wide port
1087  * @port:       port to add the phy to
1088  * @phy:        phy to add
1089  *
1090  * When a port is initially created, it is empty (has no phys).  All
1091  * ports must have at least one phy to operated, and all wide ports
1092  * must have at least two.  The current code makes no difference
1093  * between ports and wide ports, but the only object that can be
1094  * connected to a remote device is a port, so ports must be formed on
1095  * all devices with phys if they're connected to anything.
1096  */
1097 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1098 {
1099         mutex_lock(&port->phy_list_mutex);
1100         if (unlikely(!list_empty(&phy->port_siblings))) {
1101                 /* make sure we're already on this port */
1102                 struct sas_phy *tmp;
1103
1104                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1105                         if (tmp == phy)
1106                                 break;
1107                 /* If this trips, you added a phy that was already
1108                  * part of a different port */
1109                 if (unlikely(tmp != phy)) {
1110                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1111                                    dev_name(&phy->dev));
1112                         BUG();
1113                 }
1114         } else {
1115                 sas_port_create_link(port, phy);
1116                 list_add_tail(&phy->port_siblings, &port->phy_list);
1117                 port->num_phys++;
1118         }
1119         mutex_unlock(&port->phy_list_mutex);
1120 }
1121 EXPORT_SYMBOL(sas_port_add_phy);
1122
1123 /**
1124  * sas_port_delete_phy - remove a phy from a port or wide port
1125  * @port:       port to remove the phy from
1126  * @phy:        phy to remove
1127  *
1128  * This operation is used for tearing down ports again.  It must be
1129  * done to every port or wide port before calling sas_port_delete.
1130  */
1131 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1132 {
1133         mutex_lock(&port->phy_list_mutex);
1134         sas_port_delete_link(port, phy);
1135         list_del_init(&phy->port_siblings);
1136         port->num_phys--;
1137         mutex_unlock(&port->phy_list_mutex);
1138 }
1139 EXPORT_SYMBOL(sas_port_delete_phy);
1140
1141 void sas_port_mark_backlink(struct sas_port *port)
1142 {
1143         int res;
1144         struct device *parent = port->dev.parent->parent->parent;
1145
1146         if (port->is_backlink)
1147                 return;
1148         port->is_backlink = 1;
1149         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1150                                 dev_name(parent));
1151         if (res)
1152                 goto err;
1153         return;
1154 err:
1155         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1156                __func__, res);
1157
1158 }
1159 EXPORT_SYMBOL(sas_port_mark_backlink);
1160
1161 /*
1162  * SAS remote PHY attributes.
1163  */
1164
1165 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1166 static ssize_t                                                          \
1167 show_sas_rphy_##name(struct device *dev,                                \
1168                      struct device_attribute *attr, char *buf)          \
1169 {                                                                       \
1170         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1171                                                                         \
1172         return snprintf(buf, 20, format_string, cast rphy->field);      \
1173 }
1174
1175 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1176         sas_rphy_show_simple(field, name, format_string, (type))        \
1177 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1178                 show_sas_rphy_##name, NULL)
1179
1180 #define sas_rphy_show_protocol(field, name)                             \
1181 static ssize_t                                                          \
1182 show_sas_rphy_##name(struct device *dev,                                \
1183                      struct device_attribute *attr, char *buf)          \
1184 {                                                                       \
1185         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1186                                                                         \
1187         if (!rphy->field)                                       \
1188                 return snprintf(buf, 20, "none\n");                     \
1189         return get_sas_protocol_names(rphy->field, buf);        \
1190 }
1191
1192 #define sas_rphy_protocol_attr(field, name)                             \
1193         sas_rphy_show_protocol(field, name)                             \
1194 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1195                 show_sas_rphy_##name, NULL)
1196
1197 static ssize_t
1198 show_sas_rphy_device_type(struct device *dev,
1199                           struct device_attribute *attr, char *buf)
1200 {
1201         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1202
1203         if (!rphy->identify.device_type)
1204                 return snprintf(buf, 20, "none\n");
1205         return get_sas_device_type_names(
1206                         rphy->identify.device_type, buf);
1207 }
1208
1209 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1210                 show_sas_rphy_device_type, NULL);
1211
1212 static ssize_t
1213 show_sas_rphy_enclosure_identifier(struct device *dev,
1214                                    struct device_attribute *attr, char *buf)
1215 {
1216         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1217         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1218         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1219         struct sas_internal *i = to_sas_internal(shost->transportt);
1220         u64 identifier;
1221         int error;
1222
1223         /*
1224          * Only devices behind an expander are supported, because the
1225          * enclosure identifier is a SMP feature.
1226          */
1227         if (scsi_is_sas_phy_local(phy))
1228                 return -EINVAL;
1229
1230         error = i->f->get_enclosure_identifier(rphy, &identifier);
1231         if (error)
1232                 return error;
1233         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1234 }
1235
1236 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1237                 show_sas_rphy_enclosure_identifier, NULL);
1238
1239 static ssize_t
1240 show_sas_rphy_bay_identifier(struct device *dev,
1241                              struct device_attribute *attr, char *buf)
1242 {
1243         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1244         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1245         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1246         struct sas_internal *i = to_sas_internal(shost->transportt);
1247         int val;
1248
1249         if (scsi_is_sas_phy_local(phy))
1250                 return -EINVAL;
1251
1252         val = i->f->get_bay_identifier(rphy);
1253         if (val < 0)
1254                 return val;
1255         return sprintf(buf, "%d\n", val);
1256 }
1257
1258 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1259                 show_sas_rphy_bay_identifier, NULL);
1260
1261 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1262                 initiator_port_protocols);
1263 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1264 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1265                 unsigned long long);
1266 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1267
1268 /* only need 8 bytes of data plus header (4 or 8) */
1269 #define BUF_SIZE 64
1270
1271 int sas_read_port_mode_page(struct scsi_device *sdev)
1272 {
1273         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1274         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1275         struct scsi_mode_data mode_data;
1276         int res, error;
1277
1278         if (!buffer)
1279                 return -ENOMEM;
1280
1281         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1282                               &mode_data, NULL);
1283
1284         error = -EINVAL;
1285         if (!scsi_status_is_good(res))
1286                 goto out;
1287
1288         msdata = buffer +  mode_data.header_length +
1289                 mode_data.block_descriptor_length;
1290
1291         if (msdata - buffer > BUF_SIZE - 8)
1292                 goto out;
1293
1294         error = 0;
1295
1296         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1297         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1298         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1299
1300  out:
1301         kfree(buffer);
1302         return error;
1303 }
1304 EXPORT_SYMBOL(sas_read_port_mode_page);
1305
1306 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1307                                "sas_end_device", NULL, NULL, NULL);
1308
1309 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1310 static ssize_t                                                          \
1311 show_sas_end_dev_##name(struct device *dev,                             \
1312                         struct device_attribute *attr, char *buf)       \
1313 {                                                                       \
1314         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1315         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1316                                                                         \
1317         return snprintf(buf, 20, format_string, cast rdev->field);      \
1318 }
1319
1320 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1321         sas_end_dev_show_simple(field, name, format_string, (type))     \
1322 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1323                 show_sas_end_dev_##name, NULL)
1324
1325 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1326 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1327                         "%d\n", int);
1328 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1329                         "%d\n", int);
1330 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1331                         "%d\n", int);
1332 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1333                         "%d\n", int);
1334
1335 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1336                                "sas_expander", NULL, NULL, NULL);
1337
1338 #define sas_expander_show_simple(field, name, format_string, cast)      \
1339 static ssize_t                                                          \
1340 show_sas_expander_##name(struct device *dev,                            \
1341                          struct device_attribute *attr, char *buf)      \
1342 {                                                                       \
1343         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1344         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1345                                                                         \
1346         return snprintf(buf, 20, format_string, cast edev->field);      \
1347 }
1348
1349 #define sas_expander_simple_attr(field, name, format_string, type)      \
1350         sas_expander_show_simple(field, name, format_string, (type))    \
1351 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1352                 show_sas_expander_##name, NULL)
1353
1354 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1355 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1356 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1357 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1358                          "%s\n", char *);
1359 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1360 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1361                          unsigned int);
1362 sas_expander_simple_attr(level, level, "%d\n", int);
1363
1364 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1365                 "sas_device", NULL, NULL, NULL);
1366
1367 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1368 {
1369         struct Scsi_Host *shost;
1370         struct sas_internal *i;
1371
1372         if (!scsi_is_sas_rphy(dev))
1373                 return 0;
1374         shost = dev_to_shost(dev->parent->parent);
1375
1376         if (!shost->transportt)
1377                 return 0;
1378         if (shost->transportt->host_attrs.ac.class !=
1379                         &sas_host_class.class)
1380                 return 0;
1381
1382         i = to_sas_internal(shost->transportt);
1383         return &i->rphy_attr_cont.ac == cont;
1384 }
1385
1386 static int sas_end_dev_match(struct attribute_container *cont,
1387                              struct device *dev)
1388 {
1389         struct Scsi_Host *shost;
1390         struct sas_internal *i;
1391         struct sas_rphy *rphy;
1392
1393         if (!scsi_is_sas_rphy(dev))
1394                 return 0;
1395         shost = dev_to_shost(dev->parent->parent);
1396         rphy = dev_to_rphy(dev);
1397
1398         if (!shost->transportt)
1399                 return 0;
1400         if (shost->transportt->host_attrs.ac.class !=
1401                         &sas_host_class.class)
1402                 return 0;
1403
1404         i = to_sas_internal(shost->transportt);
1405         return &i->end_dev_attr_cont.ac == cont &&
1406                 rphy->identify.device_type == SAS_END_DEVICE;
1407 }
1408
1409 static int sas_expander_match(struct attribute_container *cont,
1410                               struct device *dev)
1411 {
1412         struct Scsi_Host *shost;
1413         struct sas_internal *i;
1414         struct sas_rphy *rphy;
1415
1416         if (!scsi_is_sas_rphy(dev))
1417                 return 0;
1418         shost = dev_to_shost(dev->parent->parent);
1419         rphy = dev_to_rphy(dev);
1420
1421         if (!shost->transportt)
1422                 return 0;
1423         if (shost->transportt->host_attrs.ac.class !=
1424                         &sas_host_class.class)
1425                 return 0;
1426
1427         i = to_sas_internal(shost->transportt);
1428         return &i->expander_attr_cont.ac == cont &&
1429                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1430                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1431 }
1432
1433 static void sas_expander_release(struct device *dev)
1434 {
1435         struct sas_rphy *rphy = dev_to_rphy(dev);
1436         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1437
1438         if (rphy->q)
1439                 blk_cleanup_queue(rphy->q);
1440
1441         put_device(dev->parent);
1442         kfree(edev);
1443 }
1444
1445 static void sas_end_device_release(struct device *dev)
1446 {
1447         struct sas_rphy *rphy = dev_to_rphy(dev);
1448         struct sas_end_device *edev = rphy_to_end_device(rphy);
1449
1450         if (rphy->q)
1451                 blk_cleanup_queue(rphy->q);
1452
1453         put_device(dev->parent);
1454         kfree(edev);
1455 }
1456
1457 /**
1458  * sas_rphy_initialize - common rphy intialization
1459  * @rphy:       rphy to initialise
1460  *
1461  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1462  * initialise the common rphy component of each.
1463  */
1464 static void sas_rphy_initialize(struct sas_rphy *rphy)
1465 {
1466         INIT_LIST_HEAD(&rphy->list);
1467 }
1468
1469 /**
1470  * sas_end_device_alloc - allocate an rphy for an end device
1471  * @parent: which port
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_end_device_alloc(struct sas_port *parent)
1479 {
1480         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1481         struct sas_end_device *rdev;
1482
1483         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1484         if (!rdev) {
1485                 return NULL;
1486         }
1487
1488         device_initialize(&rdev->rphy.dev);
1489         rdev->rphy.dev.parent = get_device(&parent->dev);
1490         rdev->rphy.dev.release = sas_end_device_release;
1491         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1492                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1493                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1494                              shost->host_no, rphy->scsi_target_id,
1495                              parent->port_identifier);
1496         } else
1497                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1498                              shost->host_no, parent->port_identifier);
1499         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1500         sas_rphy_initialize(&rdev->rphy);
1501         transport_setup_device(&rdev->rphy.dev);
1502
1503         return &rdev->rphy;
1504 }
1505 EXPORT_SYMBOL(sas_end_device_alloc);
1506
1507 /**
1508  * sas_expander_alloc - allocate an rphy for an end device
1509  * @parent: which port
1510  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1511  *
1512  * Allocates an SAS remote PHY structure, connected to @parent.
1513  *
1514  * Returns:
1515  *      SAS PHY allocated or %NULL if the allocation failed.
1516  */
1517 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1518                                     enum sas_device_type type)
1519 {
1520         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1521         struct sas_expander_device *rdev;
1522         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1523
1524         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1525                type != SAS_FANOUT_EXPANDER_DEVICE);
1526
1527         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1528         if (!rdev) {
1529                 return NULL;
1530         }
1531
1532         device_initialize(&rdev->rphy.dev);
1533         rdev->rphy.dev.parent = get_device(&parent->dev);
1534         rdev->rphy.dev.release = sas_expander_release;
1535         mutex_lock(&sas_host->lock);
1536         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1537         mutex_unlock(&sas_host->lock);
1538         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1539                      shost->host_no, rdev->rphy.scsi_target_id);
1540         rdev->rphy.identify.device_type = type;
1541         sas_rphy_initialize(&rdev->rphy);
1542         transport_setup_device(&rdev->rphy.dev);
1543
1544         return &rdev->rphy;
1545 }
1546 EXPORT_SYMBOL(sas_expander_alloc);
1547
1548 /**
1549  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1550  * @rphy:       The remote PHY to be added
1551  *
1552  * Publishes a SAS remote PHY to the rest of the system.
1553  */
1554 int sas_rphy_add(struct sas_rphy *rphy)
1555 {
1556         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1557         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1558         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1559         struct sas_identify *identify = &rphy->identify;
1560         int error;
1561
1562         if (parent->rphy)
1563                 return -ENXIO;
1564         parent->rphy = rphy;
1565
1566         error = device_add(&rphy->dev);
1567         if (error)
1568                 return error;
1569         transport_add_device(&rphy->dev);
1570         transport_configure_device(&rphy->dev);
1571         if (sas_bsg_initialize(shost, rphy))
1572                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1573
1574
1575         mutex_lock(&sas_host->lock);
1576         list_add_tail(&rphy->list, &sas_host->rphy_list);
1577         if (identify->device_type == SAS_END_DEVICE &&
1578             (identify->target_port_protocols &
1579              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1580                 rphy->scsi_target_id = sas_host->next_target_id++;
1581         else if (identify->device_type == SAS_END_DEVICE)
1582                 rphy->scsi_target_id = -1;
1583         mutex_unlock(&sas_host->lock);
1584
1585         if (identify->device_type == SAS_END_DEVICE &&
1586             rphy->scsi_target_id != -1) {
1587                 int lun;
1588
1589                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1590                         lun = SCAN_WILD_CARD;
1591                 else
1592                         lun = 0;
1593
1594                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
1595         }
1596
1597         return 0;
1598 }
1599 EXPORT_SYMBOL(sas_rphy_add);
1600
1601 /**
1602  * sas_rphy_free  -  free a SAS remote PHY
1603  * @rphy: SAS remote PHY to free
1604  *
1605  * Frees the specified SAS remote PHY.
1606  *
1607  * Note:
1608  *   This function must only be called on a remote
1609  *   PHY that has not successfully been added using
1610  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1611  */
1612 void sas_rphy_free(struct sas_rphy *rphy)
1613 {
1614         struct device *dev = &rphy->dev;
1615         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1616         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1617
1618         mutex_lock(&sas_host->lock);
1619         list_del(&rphy->list);
1620         mutex_unlock(&sas_host->lock);
1621
1622         sas_bsg_remove(shost, rphy);
1623
1624         transport_destroy_device(dev);
1625
1626         put_device(dev);
1627 }
1628 EXPORT_SYMBOL(sas_rphy_free);
1629
1630 /**
1631  * sas_rphy_delete  -  remove and free SAS remote PHY
1632  * @rphy:       SAS remote PHY to remove and free
1633  *
1634  * Removes the specified SAS remote PHY and frees it.
1635  */
1636 void
1637 sas_rphy_delete(struct sas_rphy *rphy)
1638 {
1639         sas_rphy_remove(rphy);
1640         sas_rphy_free(rphy);
1641 }
1642 EXPORT_SYMBOL(sas_rphy_delete);
1643
1644 /**
1645  * sas_rphy_unlink  -  unlink SAS remote PHY
1646  * @rphy:       SAS remote phy to unlink from its parent port
1647  *
1648  * Removes port reference to an rphy
1649  */
1650 void sas_rphy_unlink(struct sas_rphy *rphy)
1651 {
1652         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1653
1654         parent->rphy = NULL;
1655 }
1656 EXPORT_SYMBOL(sas_rphy_unlink);
1657
1658 /**
1659  * sas_rphy_remove  -  remove SAS remote PHY
1660  * @rphy:       SAS remote phy to remove
1661  *
1662  * Removes the specified SAS remote PHY.
1663  */
1664 void
1665 sas_rphy_remove(struct sas_rphy *rphy)
1666 {
1667         struct device *dev = &rphy->dev;
1668
1669         switch (rphy->identify.device_type) {
1670         case SAS_END_DEVICE:
1671                 scsi_remove_target(dev);
1672                 break;
1673         case SAS_EDGE_EXPANDER_DEVICE:
1674         case SAS_FANOUT_EXPANDER_DEVICE:
1675                 sas_remove_children(dev);
1676                 break;
1677         default:
1678                 break;
1679         }
1680
1681         sas_rphy_unlink(rphy);
1682         transport_remove_device(dev);
1683         device_del(dev);
1684 }
1685 EXPORT_SYMBOL(sas_rphy_remove);
1686
1687 /**
1688  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1689  * @dev:        device to check
1690  *
1691  * Returns:
1692  *      %1 if the device represents a SAS remote PHY, %0 else
1693  */
1694 int scsi_is_sas_rphy(const struct device *dev)
1695 {
1696         return dev->release == sas_end_device_release ||
1697                 dev->release == sas_expander_release;
1698 }
1699 EXPORT_SYMBOL(scsi_is_sas_rphy);
1700
1701
1702 /*
1703  * SCSI scan helper
1704  */
1705
1706 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1707                 uint id, uint lun)
1708 {
1709         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1710         struct sas_rphy *rphy;
1711
1712         mutex_lock(&sas_host->lock);
1713         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1714                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1715                     rphy->scsi_target_id == -1)
1716                         continue;
1717
1718                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1719                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1720                         scsi_scan_target(&rphy->dev, 0,
1721                                          rphy->scsi_target_id, lun, 1);
1722                 }
1723         }
1724         mutex_unlock(&sas_host->lock);
1725
1726         return 0;
1727 }
1728
1729
1730 /*
1731  * Setup / Teardown code
1732  */
1733
1734 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1735         i->private_##attrb[count] = dev_attr_##field;           \
1736         i->private_##attrb[count].attr.mode = perm;                     \
1737         i->attrb[count] = &i->private_##attrb[count];                   \
1738         if (test)                                                       \
1739                 count++
1740
1741 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1742         i->private_##attrb[count] = dev_attr_##field;           \
1743         i->private_##attrb[count].attr.mode = perm;                     \
1744         if (ro_test) {                                                  \
1745                 i->private_##attrb[count].attr.mode = ro_perm;          \
1746                 i->private_##attrb[count].store = NULL;                 \
1747         }                                                               \
1748         i->attrb[count] = &i->private_##attrb[count];                   \
1749         if (test)                                                       \
1750                 count++
1751
1752 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1753         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1754
1755 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1756         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1757
1758 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1759         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1760
1761 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1762         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1763                         !i->f->set_phy_speed, S_IRUGO)
1764
1765 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1766         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1767                           !i->f->func, S_IRUGO)
1768
1769 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1770         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1771
1772 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1773         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1774
1775 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1776         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1777
1778 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1779         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1780
1781 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1782         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1783
1784 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1785         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1786
1787 /**
1788  * sas_attach_transport  -  instantiate SAS transport template
1789  * @ft:         SAS transport class function template
1790  */
1791 struct scsi_transport_template *
1792 sas_attach_transport(struct sas_function_template *ft)
1793 {
1794         struct sas_internal *i;
1795         int count;
1796
1797         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1798         if (!i)
1799                 return NULL;
1800
1801         i->t.user_scan = sas_user_scan;
1802
1803         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1804         i->t.host_attrs.ac.class = &sas_host_class.class;
1805         i->t.host_attrs.ac.match = sas_host_match;
1806         transport_container_register(&i->t.host_attrs);
1807         i->t.host_size = sizeof(struct sas_host_attrs);
1808
1809         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1810         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1811         i->phy_attr_cont.ac.match = sas_phy_match;
1812         transport_container_register(&i->phy_attr_cont);
1813
1814         i->port_attr_cont.ac.class = &sas_port_class.class;
1815         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1816         i->port_attr_cont.ac.match = sas_port_match;
1817         transport_container_register(&i->port_attr_cont);
1818
1819         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1820         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1821         i->rphy_attr_cont.ac.match = sas_rphy_match;
1822         transport_container_register(&i->rphy_attr_cont);
1823
1824         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1825         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1826         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1827         transport_container_register(&i->end_dev_attr_cont);
1828
1829         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1830         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1831         i->expander_attr_cont.ac.match = sas_expander_match;
1832         transport_container_register(&i->expander_attr_cont);
1833
1834         i->f = ft;
1835
1836         count = 0;
1837         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1838         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1839         SETUP_PHY_ATTRIBUTE(device_type);
1840         SETUP_PHY_ATTRIBUTE(sas_address);
1841         SETUP_PHY_ATTRIBUTE(phy_identifier);
1842         //SETUP_PHY_ATTRIBUTE(port_identifier);
1843         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1844         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1845         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1846         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1847         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1848
1849         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1850         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1851         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1852         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1853         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1854         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1855         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1856         i->phy_attrs[count] = NULL;
1857
1858         count = 0;
1859         SETUP_PORT_ATTRIBUTE(num_phys);
1860         i->port_attrs[count] = NULL;
1861
1862         count = 0;
1863         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1864         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1865         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1866         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1867         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1868         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1869                                        get_enclosure_identifier);
1870         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1871                                        get_bay_identifier);
1872         i->rphy_attrs[count] = NULL;
1873
1874         count = 0;
1875         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1876         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1877         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1878         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1879         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1880         i->end_dev_attrs[count] = NULL;
1881
1882         count = 0;
1883         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1884         SETUP_EXPANDER_ATTRIBUTE(product_id);
1885         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1886         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1887         SETUP_EXPANDER_ATTRIBUTE(component_id);
1888         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1889         SETUP_EXPANDER_ATTRIBUTE(level);
1890         i->expander_attrs[count] = NULL;
1891
1892         return &i->t;
1893 }
1894 EXPORT_SYMBOL(sas_attach_transport);
1895
1896 /**
1897  * sas_release_transport  -  release SAS transport template instance
1898  * @t:          transport template instance
1899  */
1900 void sas_release_transport(struct scsi_transport_template *t)
1901 {
1902         struct sas_internal *i = to_sas_internal(t);
1903
1904         transport_container_unregister(&i->t.host_attrs);
1905         transport_container_unregister(&i->phy_attr_cont);
1906         transport_container_unregister(&i->port_attr_cont);
1907         transport_container_unregister(&i->rphy_attr_cont);
1908         transport_container_unregister(&i->end_dev_attr_cont);
1909         transport_container_unregister(&i->expander_attr_cont);
1910
1911         kfree(i);
1912 }
1913 EXPORT_SYMBOL(sas_release_transport);
1914
1915 static __init int sas_transport_init(void)
1916 {
1917         int error;
1918
1919         error = transport_class_register(&sas_host_class);
1920         if (error)
1921                 goto out;
1922         error = transport_class_register(&sas_phy_class);
1923         if (error)
1924                 goto out_unregister_transport;
1925         error = transport_class_register(&sas_port_class);
1926         if (error)
1927                 goto out_unregister_phy;
1928         error = transport_class_register(&sas_rphy_class);
1929         if (error)
1930                 goto out_unregister_port;
1931         error = transport_class_register(&sas_end_dev_class);
1932         if (error)
1933                 goto out_unregister_rphy;
1934         error = transport_class_register(&sas_expander_class);
1935         if (error)
1936                 goto out_unregister_end_dev;
1937
1938         return 0;
1939
1940  out_unregister_end_dev:
1941         transport_class_unregister(&sas_end_dev_class);
1942  out_unregister_rphy:
1943         transport_class_unregister(&sas_rphy_class);
1944  out_unregister_port:
1945         transport_class_unregister(&sas_port_class);
1946  out_unregister_phy:
1947         transport_class_unregister(&sas_phy_class);
1948  out_unregister_transport:
1949         transport_class_unregister(&sas_host_class);
1950  out:
1951         return error;
1952
1953 }
1954
1955 static void __exit sas_transport_exit(void)
1956 {
1957         transport_class_unregister(&sas_host_class);
1958         transport_class_unregister(&sas_phy_class);
1959         transport_class_unregister(&sas_port_class);
1960         transport_class_unregister(&sas_rphy_class);
1961         transport_class_unregister(&sas_end_dev_class);
1962         transport_class_unregister(&sas_expander_class);
1963 }
1964
1965 MODULE_AUTHOR("Christoph Hellwig");
1966 MODULE_DESCRIPTION("SAS Transport Attributes");
1967 MODULE_LICENSE("GPL");
1968
1969 module_init(sas_transport_init);
1970 module_exit(sas_transport_exit);