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_request.h>
  37 #include <scsi/scsi_device.h>
  38 #include <scsi/scsi_host.h>
  39 #include <scsi/scsi_transport.h>
  40 #include <scsi/scsi_transport_sas.h>
  41
  42 #include "scsi_sas_internal.h"
  43 struct sas_host_attrs {
  44         struct list_head rphy_list;
  45         struct mutex lock;
  46         struct request_queue *q;
  47         u32 next_target_id;
  48         u32 next_expander_id;
  49         int next_port_id;
  50 };
  51 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
  52
  53
  54 /*
  55  * Hack to allow attributes of the same name in different objects.
  56  */
  57 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  58         struct device_attribute dev_attr_##_prefix##_##_name = \
  59         __ATTR(_name,_mode,_show,_store)
  60
  61
  62 /*
  63  * Pretty printing helpers
  64  */
  65
  66 #define sas_bitfield_name_match(title, table)                   \
  67 static ssize_t                                                  \
  68 get_sas_##title##_names(u32 table_key, char *buf)               \
  69 {                                                               \
  70         char *prefix = "";                                      \
  71         ssize_t len = 0;                                        \
  72         int i;                                                  \
  73                                                                 \
  74         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  75                 if (table[i].value & table_key) {               \
  76                         len += sprintf(buf + len, "%s%s",       \
  77                                 prefix, table[i].name);         \
  78                         prefix = ", ";                          \
  79                 }                                               \
  80         }                                                       \
  81         len += sprintf(buf + len, "\n");                        \
  82         return len;                                             \
  83 }
  84
  85 #define sas_bitfield_name_set(title, table)                     \
  86 static ssize_t                                                  \
  87 set_sas_##title##_names(u32 *table_key, const char *buf)        \
  88 {                                                               \
  89         ssize_t len = 0;                                        \
  90         int i;                                                  \
  91                                                                 \
  92         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  93                 len = strlen(table[i].name);                    \
  94                 if (strncmp(buf, table[i].name, len) == 0 &&    \
  95                     (buf[len] == '\n' || buf[len] == '\0')) {   \
  96                         *table_key = table[i].value;            \
  97                         return 0;                               \
  98                 }                                               \
  99         }                                                       \
 100         return -EINVAL;                                         \
 101 }
 102
 103 #define sas_bitfield_name_search(title, table)                  \
 104 static ssize_t                                                  \
 105 get_sas_##title##_names(u32 table_key, char *buf)               \
 106 {                                                               \
 107         ssize_t len = 0;                                        \
 108         int i;                                                  \
 109                                                                 \
 110         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 111                 if (table[i].value == table_key) {              \
 112                         len += sprintf(buf + len, "%s",         \
 113                                 table[i].name);                 \
 114                         break;                                  \
 115                 }                                               \
 116         }                                                       \
 117         len += sprintf(buf + len, "\n");                        \
 118         return len;                                             \
 119 }
 120
 121 static struct {
 122         u32             value;
 123         char            *name;
 124 } sas_device_type_names[] = {
 125         { SAS_PHY_UNUSED,               "unused" },
 126         { SAS_END_DEVICE,               "end device" },
 127         { SAS_EDGE_EXPANDER_DEVICE,     "edge expander" },
 128         { SAS_FANOUT_EXPANDER_DEVICE,   "fanout expander" },
 129 };
 130 sas_bitfield_name_search(device_type, sas_device_type_names)
 131
 132
 133 static struct {
 134         u32             value;
 135         char            *name;
 136 } sas_protocol_names[] = {
 137         { SAS_PROTOCOL_SATA,            "sata" },
 138         { SAS_PROTOCOL_SMP,             "smp" },
 139         { SAS_PROTOCOL_STP,             "stp" },
 140         { SAS_PROTOCOL_SSP,             "ssp" },
 141 };
 142 sas_bitfield_name_match(protocol, sas_protocol_names)
 143
 144 static struct {
 145         u32             value;
 146         char            *name;
 147 } sas_linkspeed_names[] = {
 148         { SAS_LINK_RATE_UNKNOWN,        "Unknown" },
 149         { SAS_PHY_DISABLED,             "Phy disabled" },
 150         { SAS_LINK_RATE_FAILED,         "Link Rate failed" },
 151         { SAS_SATA_SPINUP_HOLD,         "Spin-up hold" },
 152         { SAS_LINK_RATE_1_5_GBPS,       "1.5 Gbit" },
 153         { SAS_LINK_RATE_3_0_GBPS,       "3.0 Gbit" },
 154         { SAS_LINK_RATE_6_0_GBPS,       "6.0 Gbit" },
 155         { SAS_LINK_RATE_12_0_GBPS,      "12.0 Gbit" },
 156 };
 157 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 158 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 159
 160 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 161 {
 162         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 163         struct sas_end_device *rdev;
 164
 165         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 166
 167         rdev = rphy_to_end_device(rphy);
 168         return rdev;
 169 }
 170
 171 static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
 172                             struct sas_rphy *rphy)
 173 {
 174         struct request *req;
 175         int ret;
 176         int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 177
 178         while ((req = blk_fetch_request(q)) != NULL) {
 179                 spin_unlock_irq(q->queue_lock);
 180
 181                 scsi_req(req)->resid_len = blk_rq_bytes(req);
 182                 if (req->next_rq)
 183                         scsi_req(req->next_rq)->resid_len =
 184                                 blk_rq_bytes(req->next_rq);
 185                 handler = to_sas_internal(shost->transportt)->f->smp_handler;
 186                 ret = handler(shost, rphy, req);
 187                 scsi_req(req)->result = ret;
 188
 189                 blk_end_request_all(req, 0);
 190
 191                 spin_lock_irq(q->queue_lock);
 192         }
 193 }
 194
 195 static void sas_host_smp_request(struct request_queue *q)
 196 {
 197         sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
 198 }
 199
 200 static void sas_non_host_smp_request(struct request_queue *q)
 201 {
 202         struct sas_rphy *rphy = q->queuedata;
 203         sas_smp_request(q, rphy_to_shost(rphy), rphy);
 204 }
 205
 206 static void sas_host_release(struct device *dev)
 207 {
 208         struct Scsi_Host *shost = dev_to_shost(dev);
 209         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 210         struct request_queue *q = sas_host->q;
 211
 212         if (q)
 213                 blk_cleanup_queue(q);
 214 }
 215
 216 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 217 {
 218         struct request_queue *q;
 219         int error;
 220         struct device *dev;
 221         char namebuf[20];
 222         const char *name;
 223         void (*release)(struct device *);
 224
 225         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 226                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 227                 return 0;
 228         }
 229
 230         q = blk_alloc_queue(GFP_KERNEL);
 231         if (!q)
 232                 return -ENOMEM;
 233         q->cmd_size = sizeof(struct scsi_request);
 234
 235         if (rphy) {
 236                 q->request_fn = sas_non_host_smp_request;
 237                 dev = &rphy->dev;
 238                 name = dev_name(dev);
 239                 release = NULL;
 240         } else {
 241                 q->request_fn = sas_host_smp_request;
 242                 dev = &shost->shost_gendev;
 243                 snprintf(namebuf, sizeof(namebuf),
 244                          "sas_host%d", shost->host_no);
 245                 name = namebuf;
 246                 release = sas_host_release;
 247         }
 248         error = blk_init_allocated_queue(q);
 249         if (error)
 250                 goto out_cleanup_queue;
 251
 252         error = bsg_register_queue(q, dev, name, release);
 253         if (error)
 254                 goto out_cleanup_queue;
 255
 256         if (rphy)
 257                 rphy->q = q;
 258         else
 259                 to_sas_host_attrs(shost)->q = q;
 260
 261         if (rphy)
 262                 q->queuedata = rphy;
 263         else
 264                 q->queuedata = shost;
 265
 266         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
 267         return 0;
 268
 269 out_cleanup_queue:
 270         blk_cleanup_queue(q);
 271         return error;
 272 }
 273
 274 static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
 275 {
 276         struct request_queue *q;
 277
 278         if (rphy)
 279                 q = rphy->q;
 280         else
 281                 q = to_sas_host_attrs(shost)->q;
 282
 283         if (!q)
 284                 return;
 285
 286         bsg_unregister_queue(q);
 287 }
 288
 289 /*
 290  * SAS host attributes
 291  */
 292
 293 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 294                           struct device *cdev)
 295 {
 296         struct Scsi_Host *shost = dev_to_shost(dev);
 297         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 298
 299         INIT_LIST_HEAD(&sas_host->rphy_list);
 300         mutex_init(&sas_host->lock);
 301         sas_host->next_target_id = 0;
 302         sas_host->next_expander_id = 0;
 303         sas_host->next_port_id = 0;
 304
 305         if (sas_bsg_initialize(shost, NULL))
 306                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 307                            shost->host_no);
 308
 309         return 0;
 310 }
 311
 312 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 313                            struct device *cdev)
 314 {
 315         struct Scsi_Host *shost = dev_to_shost(dev);
 316
 317         sas_bsg_remove(shost, NULL);
 318
 319         return 0;
 320 }
 321
 322 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 323                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 324
 325 static int sas_host_match(struct attribute_container *cont,
 326                             struct device *dev)
 327 {
 328         struct Scsi_Host *shost;
 329         struct sas_internal *i;
 330
 331         if (!scsi_is_host_device(dev))
 332                 return 0;
 333         shost = dev_to_shost(dev);
 334
 335         if (!shost->transportt)
 336                 return 0;
 337         if (shost->transportt->host_attrs.ac.class !=
 338                         &sas_host_class.class)
 339                 return 0;
 340
 341         i = to_sas_internal(shost->transportt);
 342         return &i->t.host_attrs.ac == cont;
 343 }
 344
 345 static int do_sas_phy_delete(struct device *dev, void *data)
 346 {
 347         int pass = (int)(unsigned long)data;
 348
 349         if (pass == 0 && scsi_is_sas_port(dev))
 350                 sas_port_delete(dev_to_sas_port(dev));
 351         else if (pass == 1 && scsi_is_sas_phy(dev))
 352                 sas_phy_delete(dev_to_phy(dev));
 353         return 0;
 354 }
 355
 356 /**
 357  * sas_remove_children  -  tear down a devices SAS data structures
 358  * @dev:        device belonging to the sas object
 359  *
 360  * Removes all SAS PHYs and remote PHYs for a given object
 361  */
 362 void sas_remove_children(struct device *dev)
 363 {
 364         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 365         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 366 }
 367 EXPORT_SYMBOL(sas_remove_children);
 368
 369 /**
 370  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 371  * @shost:      Scsi Host that is torn down
 372  *
 373  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
 374  * Scsi_Host as well.
 375  *
 376  * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
 377  * already removed.
 378  */
 379 void sas_remove_host(struct Scsi_Host *shost)
 380 {
 381         sas_remove_children(&shost->shost_gendev);
 382         scsi_remove_host(shost);
 383 }
 384 EXPORT_SYMBOL(sas_remove_host);
 385
 386 /**
 387  * sas_get_address - return the SAS address of the device
 388  * @sdev: scsi device
 389  *
 390  * Returns the SAS address of the scsi device
 391  */
 392 u64 sas_get_address(struct scsi_device *sdev)
 393 {
 394         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 395
 396         return rdev->rphy.identify.sas_address;
 397 }
 398 EXPORT_SYMBOL(sas_get_address);
 399
 400 /**
 401  * sas_tlr_supported - checking TLR bit in vpd 0x90
 402  * @sdev: scsi device struct
 403  *
 404  * Check Transport Layer Retries are supported or not.
 405  * If vpd page 0x90 is present, TRL is supported.
 406  *
 407  */
 408 unsigned int
 409 sas_tlr_supported(struct scsi_device *sdev)
 410 {
 411         const int vpd_len = 32;
 412         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 413         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 414         int ret = 0;
 415
 416         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 417                 goto out;
 418
 419         /*
 420          * Magic numbers: the VPD Protocol page (0x90)
 421          * has a 4 byte header and then one entry per device port
 422          * the TLR bit is at offset 8 on each port entry
 423          * if we take the first port, that's at total offset 12
 424          */
 425         ret = buffer[12] & 0x01;
 426
 427  out:
 428         kfree(buffer);
 429         rdev->tlr_supported = ret;
 430         return ret;
 431
 432 }
 433 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 434
 435 /**
 436  * sas_disable_tlr - setting TLR flags
 437  * @sdev: scsi device struct
 438  *
 439  * Seting tlr_enabled flag to 0.
 440  *
 441  */
 442 void
 443 sas_disable_tlr(struct scsi_device *sdev)
 444 {
 445         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 446
 447         rdev->tlr_enabled = 0;
 448 }
 449 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 450
 451 /**
 452  * sas_enable_tlr - setting TLR flags
 453  * @sdev: scsi device struct
 454  *
 455  * Seting tlr_enabled flag 1.
 456  *
 457  */
 458 void sas_enable_tlr(struct scsi_device *sdev)
 459 {
 460         unsigned int tlr_supported = 0;
 461         tlr_supported  = sas_tlr_supported(sdev);
 462
 463         if (tlr_supported) {
 464                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 465
 466                 rdev->tlr_enabled = 1;
 467         }
 468
 469         return;
 470 }
 471 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 472
 473 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 474 {
 475         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 476         return rdev->tlr_enabled;
 477 }
 478 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 479
 480 /*
 481  * SAS Phy attributes
 482  */
 483
 484 #define sas_phy_show_simple(field, name, format_string, cast)           \
 485 static ssize_t                                                          \
 486 show_sas_phy_##name(struct device *dev,                                 \
 487                     struct device_attribute *attr, char *buf)           \
 488 {                                                                       \
 489         struct sas_phy *phy = transport_class_to_phy(dev);              \
 490                                                                         \
 491         return snprintf(buf, 20, format_string, cast phy->field);       \
 492 }
 493
 494 #define sas_phy_simple_attr(field, name, format_string, type)           \
 495         sas_phy_show_simple(field, name, format_string, (type)) \
 496 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 497
 498 #define sas_phy_show_protocol(field, name)                              \
 499 static ssize_t                                                          \
 500 show_sas_phy_##name(struct device *dev,                                 \
 501                     struct device_attribute *attr, char *buf)           \
 502 {                                                                       \
 503         struct sas_phy *phy = transport_class_to_phy(dev);              \
 504                                                                         \
 505         if (!phy->field)                                                \
 506                 return snprintf(buf, 20, "none\n");                     \
 507         return get_sas_protocol_names(phy->field, buf);         \
 508 }
 509
 510 #define sas_phy_protocol_attr(field, name)                              \
 511         sas_phy_show_protocol(field, name)                              \
 512 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 513
 514 #define sas_phy_show_linkspeed(field)                                   \
 515 static ssize_t                                                          \
 516 show_sas_phy_##field(struct device *dev,                                \
 517                      struct device_attribute *attr, char *buf)          \
 518 {                                                                       \
 519         struct sas_phy *phy = transport_class_to_phy(dev);              \
 520                                                                         \
 521         return get_sas_linkspeed_names(phy->field, buf);                \
 522 }
 523
 524 /* Fudge to tell if we're minimum or maximum */
 525 #define sas_phy_store_linkspeed(field)                                  \
 526 static ssize_t                                                          \
 527 store_sas_phy_##field(struct device *dev,                               \
 528                       struct device_attribute *attr,                    \
 529                       const char *buf,  size_t count)                   \
 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         u32 value;                                                      \
 535         struct sas_phy_linkrates rates = {0};                           \
 536         int error;                                                      \
 537                                                                         \
 538         error = set_sas_linkspeed_names(&value, buf);                   \
 539         if (error)                                                      \
 540                 return error;                                           \
 541         rates.field = value;                                            \
 542         error = i->f->set_phy_speed(phy, &rates);                       \
 543                                                                         \
 544         return error ? error : count;                                   \
 545 }
 546
 547 #define sas_phy_linkspeed_rw_attr(field)                                \
 548         sas_phy_show_linkspeed(field)                                   \
 549         sas_phy_store_linkspeed(field)                                  \
 550 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 551         store_sas_phy_##field)
 552
 553 #define sas_phy_linkspeed_attr(field)                                   \
 554         sas_phy_show_linkspeed(field)                                   \
 555 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 556
 557
 558 #define sas_phy_show_linkerror(field)                                   \
 559 static ssize_t                                                          \
 560 show_sas_phy_##field(struct device *dev,                                \
 561                      struct device_attribute *attr, char *buf)          \
 562 {                                                                       \
 563         struct sas_phy *phy = transport_class_to_phy(dev);              \
 564         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 565         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 566         int error;                                                      \
 567                                                                         \
 568         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 569         if (error)                                                      \
 570                 return error;                                           \
 571         return snprintf(buf, 20, "%u\n", phy->field);                   \
 572 }
 573
 574 #define sas_phy_linkerror_attr(field)                                   \
 575         sas_phy_show_linkerror(field)                                   \
 576 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 577
 578
 579 static ssize_t
 580 show_sas_device_type(struct device *dev,
 581                      struct device_attribute *attr, char *buf)
 582 {
 583         struct sas_phy *phy = transport_class_to_phy(dev);
 584
 585         if (!phy->identify.device_type)
 586                 return snprintf(buf, 20, "none\n");
 587         return get_sas_device_type_names(phy->identify.device_type, buf);
 588 }
 589 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 590
 591 static ssize_t do_sas_phy_enable(struct device *dev,
 592                 size_t count, int enable)
 593 {
 594         struct sas_phy *phy = transport_class_to_phy(dev);
 595         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 596         struct sas_internal *i = to_sas_internal(shost->transportt);
 597         int error;
 598
 599         error = i->f->phy_enable(phy, enable);
 600         if (error)
 601                 return error;
 602         phy->enabled = enable;
 603         return count;
 604 };
 605
 606 static ssize_t
 607 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 608                      const char *buf, size_t count)
 609 {
 610         if (count < 1)
 611                 return -EINVAL;
 612
 613         switch (buf[0]) {
 614         case '0':
 615                 do_sas_phy_enable(dev, count, 0);
 616                 break;
 617         case '1':
 618                 do_sas_phy_enable(dev, count, 1);
 619                 break;
 620         default:
 621                 return -EINVAL;
 622         }
 623
 624         return count;
 625 }
 626
 627 static ssize_t
 628 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 629                     char *buf)
 630 {
 631         struct sas_phy *phy = transport_class_to_phy(dev);
 632
 633         return snprintf(buf, 20, "%d", phy->enabled);
 634 }
 635
 636 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 637                          store_sas_phy_enable);
 638
 639 static ssize_t
 640 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 641 {
 642         struct sas_phy *phy = transport_class_to_phy(dev);
 643         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 644         struct sas_internal *i = to_sas_internal(shost->transportt);
 645         int error;
 646
 647         error = i->f->phy_reset(phy, hard_reset);
 648         if (error)
 649                 return error;
 650         phy->enabled = 1;
 651         return count;
 652 };
 653
 654 static ssize_t
 655 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 656                      const char *buf, size_t count)
 657 {
 658         return do_sas_phy_reset(dev, count, 0);
 659 }
 660 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 661
 662 static ssize_t
 663 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 664                      const char *buf, size_t count)
 665 {
 666         return do_sas_phy_reset(dev, count, 1);
 667 }
 668 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 669
 670 sas_phy_protocol_attr(identify.initiator_port_protocols,
 671                 initiator_port_protocols);
 672 sas_phy_protocol_attr(identify.target_port_protocols,
 673                 target_port_protocols);
 674 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 675                 unsigned long long);
 676 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 677 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 678 sas_phy_linkspeed_attr(negotiated_linkrate);
 679 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 680 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 681 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 682 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 683 sas_phy_linkerror_attr(invalid_dword_count);
 684 sas_phy_linkerror_attr(running_disparity_error_count);
 685 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 686 sas_phy_linkerror_attr(phy_reset_problem_count);
 687
 688 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 689                          struct device *cdev)
 690 {
 691         struct sas_phy *phy = dev_to_phy(dev);
 692         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 693         struct sas_internal *i = to_sas_internal(shost->transportt);
 694
 695         if (i->f->phy_setup)
 696                 i->f->phy_setup(phy);
 697
 698         return 0;
 699 }
 700
 701 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 702                 "sas_phy", sas_phy_setup, NULL, NULL);
 703
 704 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 705 {
 706         struct Scsi_Host *shost;
 707         struct sas_internal *i;
 708
 709         if (!scsi_is_sas_phy(dev))
 710                 return 0;
 711         shost = dev_to_shost(dev->parent);
 712
 713         if (!shost->transportt)
 714                 return 0;
 715         if (shost->transportt->host_attrs.ac.class !=
 716                         &sas_host_class.class)
 717                 return 0;
 718
 719         i = to_sas_internal(shost->transportt);
 720         return &i->phy_attr_cont.ac == cont;
 721 }
 722
 723 static void sas_phy_release(struct device *dev)
 724 {
 725         struct sas_phy *phy = dev_to_phy(dev);
 726         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 727         struct sas_internal *i = to_sas_internal(shost->transportt);
 728
 729         if (i->f->phy_release)
 730                 i->f->phy_release(phy);
 731         put_device(dev->parent);
 732         kfree(phy);
 733 }
 734
 735 /**
 736  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 737  * @parent:     Parent device
 738  * @number:     Phy index
 739  *
 740  * Allocates an SAS PHY structure.  It will be added in the device tree
 741  * below the device specified by @parent, which has to be either a Scsi_Host
 742  * or sas_rphy.
 743  *
 744  * Returns:
 745  *      SAS PHY allocated or %NULL if the allocation failed.
 746  */
 747 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 748 {
 749         struct Scsi_Host *shost = dev_to_shost(parent);
 750         struct sas_phy *phy;
 751
 752         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 753         if (!phy)
 754                 return NULL;
 755
 756         phy->number = number;
 757         phy->enabled = 1;
 758
 759         device_initialize(&phy->dev);
 760         phy->dev.parent = get_device(parent);
 761         phy->dev.release = sas_phy_release;
 762         INIT_LIST_HEAD(&phy->port_siblings);
 763         if (scsi_is_sas_expander_device(parent)) {
 764                 struct sas_rphy *rphy = dev_to_rphy(parent);
 765                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 766                         rphy->scsi_target_id, number);
 767         } else
 768                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 769
 770         transport_setup_device(&phy->dev);
 771
 772         return phy;
 773 }
 774 EXPORT_SYMBOL(sas_phy_alloc);
 775
 776 /**
 777  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 778  * @phy:        The PHY to be added
 779  *
 780  * Publishes a SAS PHY to the rest of the system.
 781  */
 782 int sas_phy_add(struct sas_phy *phy)
 783 {
 784         int error;
 785
 786         error = device_add(&phy->dev);
 787         if (!error) {
 788                 transport_add_device(&phy->dev);
 789                 transport_configure_device(&phy->dev);
 790         }
 791
 792         return error;
 793 }
 794 EXPORT_SYMBOL(sas_phy_add);
 795
 796 /**
 797  * sas_phy_free  -  free a SAS PHY
 798  * @phy:        SAS PHY to free
 799  *
 800  * Frees the specified SAS PHY.
 801  *
 802  * Note:
 803  *   This function must only be called on a PHY that has not
 804  *   successfully been added using sas_phy_add().
 805  */
 806 void sas_phy_free(struct sas_phy *phy)
 807 {
 808         transport_destroy_device(&phy->dev);
 809         put_device(&phy->dev);
 810 }
 811 EXPORT_SYMBOL(sas_phy_free);
 812
 813 /**
 814  * sas_phy_delete  -  remove SAS PHY
 815  * @phy:        SAS PHY to remove
 816  *
 817  * Removes the specified SAS PHY.  If the SAS PHY has an
 818  * associated remote PHY it is removed before.
 819  */
 820 void
 821 sas_phy_delete(struct sas_phy *phy)
 822 {
 823         struct device *dev = &phy->dev;
 824
 825         /* this happens if the phy is still part of a port when deleted */
 826         BUG_ON(!list_empty(&phy->port_siblings));
 827
 828         transport_remove_device(dev);
 829         device_del(dev);
 830         transport_destroy_device(dev);
 831         put_device(dev);
 832 }
 833 EXPORT_SYMBOL(sas_phy_delete);
 834
 835 /**
 836  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 837  * @dev:        device to check
 838  *
 839  * Returns:
 840  *      %1 if the device represents a SAS PHY, %0 else
 841  */
 842 int scsi_is_sas_phy(const struct device *dev)
 843 {
 844         return dev->release == sas_phy_release;
 845 }
 846 EXPORT_SYMBOL(scsi_is_sas_phy);
 847
 848 /*
 849  * SAS Port attributes
 850  */
 851 #define sas_port_show_simple(field, name, format_string, cast)          \
 852 static ssize_t                                                          \
 853 show_sas_port_##name(struct device *dev,                                \
 854                      struct device_attribute *attr, char *buf)          \
 855 {                                                                       \
 856         struct sas_port *port = transport_class_to_sas_port(dev);       \
 857                                                                         \
 858         return snprintf(buf, 20, format_string, cast port->field);      \
 859 }
 860
 861 #define sas_port_simple_attr(field, name, format_string, type)          \
 862         sas_port_show_simple(field, name, format_string, (type))        \
 863 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 864
 865 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 866
 867 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 868                                "sas_port", NULL, NULL, NULL);
 869
 870 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 871 {
 872         struct Scsi_Host *shost;
 873         struct sas_internal *i;
 874
 875         if (!scsi_is_sas_port(dev))
 876                 return 0;
 877         shost = dev_to_shost(dev->parent);
 878
 879         if (!shost->transportt)
 880                 return 0;
 881         if (shost->transportt->host_attrs.ac.class !=
 882                         &sas_host_class.class)
 883                 return 0;
 884
 885         i = to_sas_internal(shost->transportt);
 886         return &i->port_attr_cont.ac == cont;
 887 }
 888
 889
 890 static void sas_port_release(struct device *dev)
 891 {
 892         struct sas_port *port = dev_to_sas_port(dev);
 893
 894         BUG_ON(!list_empty(&port->phy_list));
 895
 896         put_device(dev->parent);
 897         kfree(port);
 898 }
 899
 900 static void sas_port_create_link(struct sas_port *port,
 901                                  struct sas_phy *phy)
 902 {
 903         int res;
 904
 905         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 906                                 dev_name(&phy->dev));
 907         if (res)
 908                 goto err;
 909         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 910         if (res)
 911                 goto err;
 912         return;
 913 err:
 914         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 915                __func__, res);
 916 }
 917
 918 static void sas_port_delete_link(struct sas_port *port,
 919                                  struct sas_phy *phy)
 920 {
 921         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 922         sysfs_remove_link(&phy->dev.kobj, "port");
 923 }
 924
 925 /** sas_port_alloc - allocate and initialize a SAS port structure
 926  *
 927  * @parent:     parent device
 928  * @port_id:    port number
 929  *
 930  * Allocates a SAS port structure.  It will be added to the device tree
 931  * below the device specified by @parent which must be either a Scsi_Host
 932  * or a sas_expander_device.
 933  *
 934  * Returns %NULL on error
 935  */
 936 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 937 {
 938         struct Scsi_Host *shost = dev_to_shost(parent);
 939         struct sas_port *port;
 940
 941         port = kzalloc(sizeof(*port), GFP_KERNEL);
 942         if (!port)
 943                 return NULL;
 944
 945         port->port_identifier = port_id;
 946
 947         device_initialize(&port->dev);
 948
 949         port->dev.parent = get_device(parent);
 950         port->dev.release = sas_port_release;
 951
 952         mutex_init(&port->phy_list_mutex);
 953         INIT_LIST_HEAD(&port->phy_list);
 954
 955         if (scsi_is_sas_expander_device(parent)) {
 956                 struct sas_rphy *rphy = dev_to_rphy(parent);
 957                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 958                              rphy->scsi_target_id, port->port_identifier);
 959         } else
 960                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 961                              port->port_identifier);
 962
 963         transport_setup_device(&port->dev);
 964
 965         return port;
 966 }
 967 EXPORT_SYMBOL(sas_port_alloc);
 968
 969 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 970  *
 971  * @parent:     parent device
 972  *
 973  * Allocates a SAS port structure and a number to go with it.  This
 974  * interface is really for adapters where the port number has no
 975  * meansing, so the sas class should manage them.  It will be added to
 976  * the device tree below the device specified by @parent which must be
 977  * either a Scsi_Host or a sas_expander_device.
 978  *
 979  * Returns %NULL on error
 980  */
 981 struct sas_port *sas_port_alloc_num(struct device *parent)
 982 {
 983         int index;
 984         struct Scsi_Host *shost = dev_to_shost(parent);
 985         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 986
 987         /* FIXME: use idr for this eventually */
 988         mutex_lock(&sas_host->lock);
 989         if (scsi_is_sas_expander_device(parent)) {
 990                 struct sas_rphy *rphy = dev_to_rphy(parent);
 991                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 992
 993                 index = exp->next_port_id++;
 994         } else
 995                 index = sas_host->next_port_id++;
 996         mutex_unlock(&sas_host->lock);
 997         return sas_port_alloc(parent, index);
 998 }
 999 EXPORT_SYMBOL(sas_port_alloc_num);
1000
1001 /**
1002  * sas_port_add - add a SAS port to the device hierarchy
1003  * @port:       port to be added
1004  *
1005  * publishes a port to the rest of the system
1006  */
1007 int sas_port_add(struct sas_port *port)
1008 {
1009         int error;
1010
1011         /* No phys should be added until this is made visible */
1012         BUG_ON(!list_empty(&port->phy_list));
1013
1014         error = device_add(&port->dev);
1015
1016         if (error)
1017                 return error;
1018
1019         transport_add_device(&port->dev);
1020         transport_configure_device(&port->dev);
1021
1022         return 0;
1023 }
1024 EXPORT_SYMBOL(sas_port_add);
1025
1026 /**
1027  * sas_port_free  -  free a SAS PORT
1028  * @port:       SAS PORT to free
1029  *
1030  * Frees the specified SAS PORT.
1031  *
1032  * Note:
1033  *   This function must only be called on a PORT that has not
1034  *   successfully been added using sas_port_add().
1035  */
1036 void sas_port_free(struct sas_port *port)
1037 {
1038         transport_destroy_device(&port->dev);
1039         put_device(&port->dev);
1040 }
1041 EXPORT_SYMBOL(sas_port_free);
1042
1043 /**
1044  * sas_port_delete  -  remove SAS PORT
1045  * @port:       SAS PORT to remove
1046  *
1047  * Removes the specified SAS PORT.  If the SAS PORT has an
1048  * associated phys, unlink them from the port as well.
1049  */
1050 void sas_port_delete(struct sas_port *port)
1051 {
1052         struct device *dev = &port->dev;
1053         struct sas_phy *phy, *tmp_phy;
1054
1055         if (port->rphy) {
1056                 sas_rphy_delete(port->rphy);
1057                 port->rphy = NULL;
1058         }
1059
1060         mutex_lock(&port->phy_list_mutex);
1061         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1062                                  port_siblings) {
1063                 sas_port_delete_link(port, phy);
1064                 list_del_init(&phy->port_siblings);
1065         }
1066         mutex_unlock(&port->phy_list_mutex);
1067
1068         if (port->is_backlink) {
1069                 struct device *parent = port->dev.parent;
1070
1071                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1072                 port->is_backlink = 0;
1073         }
1074
1075         transport_remove_device(dev);
1076         device_del(dev);
1077         transport_destroy_device(dev);
1078         put_device(dev);
1079 }
1080 EXPORT_SYMBOL(sas_port_delete);
1081
1082 /**
1083  * scsi_is_sas_port -  check if a struct device represents a SAS port
1084  * @dev:        device to check
1085  *
1086  * Returns:
1087  *      %1 if the device represents a SAS Port, %0 else
1088  */
1089 int scsi_is_sas_port(const struct device *dev)
1090 {
1091         return dev->release == sas_port_release;
1092 }
1093 EXPORT_SYMBOL(scsi_is_sas_port);
1094
1095 /**
1096  * sas_port_get_phy - try to take a reference on a port member
1097  * @port: port to check
1098  */
1099 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1100 {
1101         struct sas_phy *phy;
1102
1103         mutex_lock(&port->phy_list_mutex);
1104         if (list_empty(&port->phy_list))
1105                 phy = NULL;
1106         else {
1107                 struct list_head *ent = port->phy_list.next;
1108
1109                 phy = list_entry(ent, typeof(*phy), port_siblings);
1110                 get_device(&phy->dev);
1111         }
1112         mutex_unlock(&port->phy_list_mutex);
1113
1114         return phy;
1115 }
1116 EXPORT_SYMBOL(sas_port_get_phy);
1117
1118 /**
1119  * sas_port_add_phy - add another phy to a port to form a wide port
1120  * @port:       port to add the phy to
1121  * @phy:        phy to add
1122  *
1123  * When a port is initially created, it is empty (has no phys).  All
1124  * ports must have at least one phy to operated, and all wide ports
1125  * must have at least two.  The current code makes no difference
1126  * between ports and wide ports, but the only object that can be
1127  * connected to a remote device is a port, so ports must be formed on
1128  * all devices with phys if they're connected to anything.
1129  */
1130 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1131 {
1132         mutex_lock(&port->phy_list_mutex);
1133         if (unlikely(!list_empty(&phy->port_siblings))) {
1134                 /* make sure we're already on this port */
1135                 struct sas_phy *tmp;
1136
1137                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1138                         if (tmp == phy)
1139                                 break;
1140                 /* If this trips, you added a phy that was already
1141                  * part of a different port */
1142                 if (unlikely(tmp != phy)) {
1143                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1144                                    dev_name(&phy->dev));
1145                         BUG();
1146                 }
1147         } else {
1148                 sas_port_create_link(port, phy);
1149                 list_add_tail(&phy->port_siblings, &port->phy_list);
1150                 port->num_phys++;
1151         }
1152         mutex_unlock(&port->phy_list_mutex);
1153 }
1154 EXPORT_SYMBOL(sas_port_add_phy);
1155
1156 /**
1157  * sas_port_delete_phy - remove a phy from a port or wide port
1158  * @port:       port to remove the phy from
1159  * @phy:        phy to remove
1160  *
1161  * This operation is used for tearing down ports again.  It must be
1162  * done to every port or wide port before calling sas_port_delete.
1163  */
1164 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1165 {
1166         mutex_lock(&port->phy_list_mutex);
1167         sas_port_delete_link(port, phy);
1168         list_del_init(&phy->port_siblings);
1169         port->num_phys--;
1170         mutex_unlock(&port->phy_list_mutex);
1171 }
1172 EXPORT_SYMBOL(sas_port_delete_phy);
1173
1174 void sas_port_mark_backlink(struct sas_port *port)
1175 {
1176         int res;
1177         struct device *parent = port->dev.parent->parent->parent;
1178
1179         if (port->is_backlink)
1180                 return;
1181         port->is_backlink = 1;
1182         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1183                                 dev_name(parent));
1184         if (res)
1185                 goto err;
1186         return;
1187 err:
1188         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1189                __func__, res);
1190
1191 }
1192 EXPORT_SYMBOL(sas_port_mark_backlink);
1193
1194 /*
1195  * SAS remote PHY attributes.
1196  */
1197
1198 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1199 static ssize_t                                                          \
1200 show_sas_rphy_##name(struct device *dev,                                \
1201                      struct device_attribute *attr, char *buf)          \
1202 {                                                                       \
1203         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1204                                                                         \
1205         return snprintf(buf, 20, format_string, cast rphy->field);      \
1206 }
1207
1208 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1209         sas_rphy_show_simple(field, name, format_string, (type))        \
1210 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1211                 show_sas_rphy_##name, NULL)
1212
1213 #define sas_rphy_show_protocol(field, name)                             \
1214 static ssize_t                                                          \
1215 show_sas_rphy_##name(struct device *dev,                                \
1216                      struct device_attribute *attr, char *buf)          \
1217 {                                                                       \
1218         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1219                                                                         \
1220         if (!rphy->field)                                       \
1221                 return snprintf(buf, 20, "none\n");                     \
1222         return get_sas_protocol_names(rphy->field, buf);        \
1223 }
1224
1225 #define sas_rphy_protocol_attr(field, name)                             \
1226         sas_rphy_show_protocol(field, name)                             \
1227 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1228                 show_sas_rphy_##name, NULL)
1229
1230 static ssize_t
1231 show_sas_rphy_device_type(struct device *dev,
1232                           struct device_attribute *attr, char *buf)
1233 {
1234         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1235
1236         if (!rphy->identify.device_type)
1237                 return snprintf(buf, 20, "none\n");
1238         return get_sas_device_type_names(
1239                         rphy->identify.device_type, buf);
1240 }
1241
1242 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1243                 show_sas_rphy_device_type, NULL);
1244
1245 static ssize_t
1246 show_sas_rphy_enclosure_identifier(struct device *dev,
1247                                    struct device_attribute *attr, char *buf)
1248 {
1249         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1250         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1251         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1252         struct sas_internal *i = to_sas_internal(shost->transportt);
1253         u64 identifier;
1254         int error;
1255
1256         error = i->f->get_enclosure_identifier(rphy, &identifier);
1257         if (error)
1258                 return error;
1259         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1260 }
1261
1262 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1263                 show_sas_rphy_enclosure_identifier, NULL);
1264
1265 static ssize_t
1266 show_sas_rphy_bay_identifier(struct device *dev,
1267                              struct device_attribute *attr, char *buf)
1268 {
1269         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1270         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1271         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1272         struct sas_internal *i = to_sas_internal(shost->transportt);
1273         int val;
1274
1275         val = i->f->get_bay_identifier(rphy);
1276         if (val < 0)
1277                 return val;
1278         return sprintf(buf, "%d\n", val);
1279 }
1280
1281 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1282                 show_sas_rphy_bay_identifier, NULL);
1283
1284 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1285                 initiator_port_protocols);
1286 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1287 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1288                 unsigned long long);
1289 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1290 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1291
1292 /* only need 8 bytes of data plus header (4 or 8) */
1293 #define BUF_SIZE 64
1294
1295 int sas_read_port_mode_page(struct scsi_device *sdev)
1296 {
1297         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1298         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1299         struct scsi_mode_data mode_data;
1300         int res, error;
1301
1302         if (!buffer)
1303                 return -ENOMEM;
1304
1305         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1306                               &mode_data, NULL);
1307
1308         error = -EINVAL;
1309         if (!scsi_status_is_good(res))
1310                 goto out;
1311
1312         msdata = buffer +  mode_data.header_length +
1313                 mode_data.block_descriptor_length;
1314
1315         if (msdata - buffer > BUF_SIZE - 8)
1316                 goto out;
1317
1318         error = 0;
1319
1320         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1321         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1322         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1323
1324  out:
1325         kfree(buffer);
1326         return error;
1327 }
1328 EXPORT_SYMBOL(sas_read_port_mode_page);
1329
1330 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1331                                "sas_end_device", NULL, NULL, NULL);
1332
1333 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1334 static ssize_t                                                          \
1335 show_sas_end_dev_##name(struct device *dev,                             \
1336                         struct device_attribute *attr, char *buf)       \
1337 {                                                                       \
1338         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1339         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1340                                                                         \
1341         return snprintf(buf, 20, format_string, cast rdev->field);      \
1342 }
1343
1344 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1345         sas_end_dev_show_simple(field, name, format_string, (type))     \
1346 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1347                 show_sas_end_dev_##name, NULL)
1348
1349 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1350 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1351                         "%d\n", int);
1352 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1353                         "%d\n", int);
1354 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1355                         "%d\n", int);
1356 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1357                         "%d\n", int);
1358
1359 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1360                                "sas_expander", NULL, NULL, NULL);
1361
1362 #define sas_expander_show_simple(field, name, format_string, cast)      \
1363 static ssize_t                                                          \
1364 show_sas_expander_##name(struct device *dev,                            \
1365                          struct device_attribute *attr, char *buf)      \
1366 {                                                                       \
1367         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1368         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1369                                                                         \
1370         return snprintf(buf, 20, format_string, cast edev->field);      \
1371 }
1372
1373 #define sas_expander_simple_attr(field, name, format_string, type)      \
1374         sas_expander_show_simple(field, name, format_string, (type))    \
1375 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1376                 show_sas_expander_##name, NULL)
1377
1378 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1379 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1380 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1381 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1382                          "%s\n", char *);
1383 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1384 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1385                          unsigned int);
1386 sas_expander_simple_attr(level, level, "%d\n", int);
1387
1388 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1389                 "sas_device", NULL, NULL, NULL);
1390
1391 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1392 {
1393         struct Scsi_Host *shost;
1394         struct sas_internal *i;
1395
1396         if (!scsi_is_sas_rphy(dev))
1397                 return 0;
1398         shost = dev_to_shost(dev->parent->parent);
1399
1400         if (!shost->transportt)
1401                 return 0;
1402         if (shost->transportt->host_attrs.ac.class !=
1403                         &sas_host_class.class)
1404                 return 0;
1405
1406         i = to_sas_internal(shost->transportt);
1407         return &i->rphy_attr_cont.ac == cont;
1408 }
1409
1410 static int sas_end_dev_match(struct attribute_container *cont,
1411                              struct device *dev)
1412 {
1413         struct Scsi_Host *shost;
1414         struct sas_internal *i;
1415         struct sas_rphy *rphy;
1416
1417         if (!scsi_is_sas_rphy(dev))
1418                 return 0;
1419         shost = dev_to_shost(dev->parent->parent);
1420         rphy = dev_to_rphy(dev);
1421
1422         if (!shost->transportt)
1423                 return 0;
1424         if (shost->transportt->host_attrs.ac.class !=
1425                         &sas_host_class.class)
1426                 return 0;
1427
1428         i = to_sas_internal(shost->transportt);
1429         return &i->end_dev_attr_cont.ac == cont &&
1430                 rphy->identify.device_type == SAS_END_DEVICE;
1431 }
1432
1433 static int sas_expander_match(struct attribute_container *cont,
1434                               struct device *dev)
1435 {
1436         struct Scsi_Host *shost;
1437         struct sas_internal *i;
1438         struct sas_rphy *rphy;
1439
1440         if (!scsi_is_sas_rphy(dev))
1441                 return 0;
1442         shost = dev_to_shost(dev->parent->parent);
1443         rphy = dev_to_rphy(dev);
1444
1445         if (!shost->transportt)
1446                 return 0;
1447         if (shost->transportt->host_attrs.ac.class !=
1448                         &sas_host_class.class)
1449                 return 0;
1450
1451         i = to_sas_internal(shost->transportt);
1452         return &i->expander_attr_cont.ac == cont &&
1453                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1454                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1455 }
1456
1457 static void sas_expander_release(struct device *dev)
1458 {
1459         struct sas_rphy *rphy = dev_to_rphy(dev);
1460         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1461
1462         if (rphy->q)
1463                 blk_cleanup_queue(rphy->q);
1464
1465         put_device(dev->parent);
1466         kfree(edev);
1467 }
1468
1469 static void sas_end_device_release(struct device *dev)
1470 {
1471         struct sas_rphy *rphy = dev_to_rphy(dev);
1472         struct sas_end_device *edev = rphy_to_end_device(rphy);
1473
1474         if (rphy->q)
1475                 blk_cleanup_queue(rphy->q);
1476
1477         put_device(dev->parent);
1478         kfree(edev);
1479 }
1480
1481 /**
1482  * sas_rphy_initialize - common rphy initialization
1483  * @rphy:       rphy to initialise
1484  *
1485  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1486  * initialise the common rphy component of each.
1487  */
1488 static void sas_rphy_initialize(struct sas_rphy *rphy)
1489 {
1490         INIT_LIST_HEAD(&rphy->list);
1491 }
1492
1493 /**
1494  * sas_end_device_alloc - allocate an rphy for an end device
1495  * @parent: which port
1496  *
1497  * Allocates an SAS remote PHY structure, connected to @parent.
1498  *
1499  * Returns:
1500  *      SAS PHY allocated or %NULL if the allocation failed.
1501  */
1502 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1503 {
1504         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1505         struct sas_end_device *rdev;
1506
1507         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1508         if (!rdev) {
1509                 return NULL;
1510         }
1511
1512         device_initialize(&rdev->rphy.dev);
1513         rdev->rphy.dev.parent = get_device(&parent->dev);
1514         rdev->rphy.dev.release = sas_end_device_release;
1515         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1516                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1517                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1518                              shost->host_no, rphy->scsi_target_id,
1519                              parent->port_identifier);
1520         } else
1521                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1522                              shost->host_no, parent->port_identifier);
1523         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1524         sas_rphy_initialize(&rdev->rphy);
1525         transport_setup_device(&rdev->rphy.dev);
1526
1527         return &rdev->rphy;
1528 }
1529 EXPORT_SYMBOL(sas_end_device_alloc);
1530
1531 /**
1532  * sas_expander_alloc - allocate an rphy for an end device
1533  * @parent: which port
1534  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1535  *
1536  * Allocates an SAS remote PHY structure, connected to @parent.
1537  *
1538  * Returns:
1539  *      SAS PHY allocated or %NULL if the allocation failed.
1540  */
1541 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1542                                     enum sas_device_type type)
1543 {
1544         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1545         struct sas_expander_device *rdev;
1546         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1547
1548         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1549                type != SAS_FANOUT_EXPANDER_DEVICE);
1550
1551         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1552         if (!rdev) {
1553                 return NULL;
1554         }
1555
1556         device_initialize(&rdev->rphy.dev);
1557         rdev->rphy.dev.parent = get_device(&parent->dev);
1558         rdev->rphy.dev.release = sas_expander_release;
1559         mutex_lock(&sas_host->lock);
1560         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1561         mutex_unlock(&sas_host->lock);
1562         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1563                      shost->host_no, rdev->rphy.scsi_target_id);
1564         rdev->rphy.identify.device_type = type;
1565         sas_rphy_initialize(&rdev->rphy);
1566         transport_setup_device(&rdev->rphy.dev);
1567
1568         return &rdev->rphy;
1569 }
1570 EXPORT_SYMBOL(sas_expander_alloc);
1571
1572 /**
1573  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1574  * @rphy:       The remote PHY to be added
1575  *
1576  * Publishes a SAS remote PHY to the rest of the system.
1577  */
1578 int sas_rphy_add(struct sas_rphy *rphy)
1579 {
1580         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1581         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1582         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1583         struct sas_identify *identify = &rphy->identify;
1584         int error;
1585
1586         if (parent->rphy)
1587                 return -ENXIO;
1588         parent->rphy = rphy;
1589
1590         error = device_add(&rphy->dev);
1591         if (error)
1592                 return error;
1593         transport_add_device(&rphy->dev);
1594         transport_configure_device(&rphy->dev);
1595         if (sas_bsg_initialize(shost, rphy))
1596                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1597
1598
1599         mutex_lock(&sas_host->lock);
1600         list_add_tail(&rphy->list, &sas_host->rphy_list);
1601         if (identify->device_type == SAS_END_DEVICE &&
1602             (identify->target_port_protocols &
1603              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1604                 rphy->scsi_target_id = sas_host->next_target_id++;
1605         else if (identify->device_type == SAS_END_DEVICE)
1606                 rphy->scsi_target_id = -1;
1607         mutex_unlock(&sas_host->lock);
1608
1609         if (identify->device_type == SAS_END_DEVICE &&
1610             rphy->scsi_target_id != -1) {
1611                 int lun;
1612
1613                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1614                         lun = SCAN_WILD_CARD;
1615                 else
1616                         lun = 0;
1617
1618                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1619                                  SCSI_SCAN_INITIAL);
1620         }
1621
1622         return 0;
1623 }
1624 EXPORT_SYMBOL(sas_rphy_add);
1625
1626 /**
1627  * sas_rphy_free  -  free a SAS remote PHY
1628  * @rphy: SAS remote PHY to free
1629  *
1630  * Frees the specified SAS remote PHY.
1631  *
1632  * Note:
1633  *   This function must only be called on a remote
1634  *   PHY that has not successfully been added using
1635  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1636  */
1637 void sas_rphy_free(struct sas_rphy *rphy)
1638 {
1639         struct device *dev = &rphy->dev;
1640         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1641         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1642
1643         mutex_lock(&sas_host->lock);
1644         list_del(&rphy->list);
1645         mutex_unlock(&sas_host->lock);
1646
1647         transport_destroy_device(dev);
1648
1649         put_device(dev);
1650 }
1651 EXPORT_SYMBOL(sas_rphy_free);
1652
1653 /**
1654  * sas_rphy_delete  -  remove and free SAS remote PHY
1655  * @rphy:       SAS remote PHY to remove and free
1656  *
1657  * Removes the specified SAS remote PHY and frees it.
1658  */
1659 void
1660 sas_rphy_delete(struct sas_rphy *rphy)
1661 {
1662         sas_rphy_remove(rphy);
1663         sas_rphy_free(rphy);
1664 }
1665 EXPORT_SYMBOL(sas_rphy_delete);
1666
1667 /**
1668  * sas_rphy_unlink  -  unlink SAS remote PHY
1669  * @rphy:       SAS remote phy to unlink from its parent port
1670  *
1671  * Removes port reference to an rphy
1672  */
1673 void sas_rphy_unlink(struct sas_rphy *rphy)
1674 {
1675         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1676
1677         parent->rphy = NULL;
1678 }
1679 EXPORT_SYMBOL(sas_rphy_unlink);
1680
1681 /**
1682  * sas_rphy_remove  -  remove SAS remote PHY
1683  * @rphy:       SAS remote phy to remove
1684  *
1685  * Removes the specified SAS remote PHY.
1686  */
1687 void
1688 sas_rphy_remove(struct sas_rphy *rphy)
1689 {
1690         struct device *dev = &rphy->dev;
1691
1692         switch (rphy->identify.device_type) {
1693         case SAS_END_DEVICE:
1694                 scsi_remove_target(dev);
1695                 break;
1696         case SAS_EDGE_EXPANDER_DEVICE:
1697         case SAS_FANOUT_EXPANDER_DEVICE:
1698                 sas_remove_children(dev);
1699                 break;
1700         default:
1701                 break;
1702         }
1703
1704         sas_rphy_unlink(rphy);
1705         sas_bsg_remove(NULL, rphy);
1706         transport_remove_device(dev);
1707         device_del(dev);
1708 }
1709 EXPORT_SYMBOL(sas_rphy_remove);
1710
1711 /**
1712  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1713  * @dev:        device to check
1714  *
1715  * Returns:
1716  *      %1 if the device represents a SAS remote PHY, %0 else
1717  */
1718 int scsi_is_sas_rphy(const struct device *dev)
1719 {
1720         return dev->release == sas_end_device_release ||
1721                 dev->release == sas_expander_release;
1722 }
1723 EXPORT_SYMBOL(scsi_is_sas_rphy);
1724
1725
1726 /*
1727  * SCSI scan helper
1728  */
1729
1730 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1731                 uint id, u64 lun)
1732 {
1733         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1734         struct sas_rphy *rphy;
1735
1736         mutex_lock(&sas_host->lock);
1737         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1738                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1739                     rphy->scsi_target_id == -1)
1740                         continue;
1741
1742                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1743                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1744                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1745                                          lun, SCSI_SCAN_MANUAL);
1746                 }
1747         }
1748         mutex_unlock(&sas_host->lock);
1749
1750         return 0;
1751 }
1752
1753
1754 /*
1755  * Setup / Teardown code
1756  */
1757
1758 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1759         i->private_##attrb[count] = dev_attr_##field;           \
1760         i->private_##attrb[count].attr.mode = perm;                     \
1761         i->attrb[count] = &i->private_##attrb[count];                   \
1762         if (test)                                                       \
1763                 count++
1764
1765 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1766         i->private_##attrb[count] = dev_attr_##field;           \
1767         i->private_##attrb[count].attr.mode = perm;                     \
1768         if (ro_test) {                                                  \
1769                 i->private_##attrb[count].attr.mode = ro_perm;          \
1770                 i->private_##attrb[count].store = NULL;                 \
1771         }                                                               \
1772         i->attrb[count] = &i->private_##attrb[count];                   \
1773         if (test)                                                       \
1774                 count++
1775
1776 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1777         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1778
1779 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1780         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1781
1782 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1783         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1784
1785 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1786         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1787                         !i->f->set_phy_speed, S_IRUGO)
1788
1789 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1790         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1791                           !i->f->func, S_IRUGO)
1792
1793 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1794         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1795
1796 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1797         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1798
1799 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1800         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1801
1802 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1803         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1804
1805 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1806         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1807
1808 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1809         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1810
1811 /**
1812  * sas_attach_transport  -  instantiate SAS transport template
1813  * @ft:         SAS transport class function template
1814  */
1815 struct scsi_transport_template *
1816 sas_attach_transport(struct sas_function_template *ft)
1817 {
1818         struct sas_internal *i;
1819         int count;
1820
1821         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1822         if (!i)
1823                 return NULL;
1824
1825         i->t.user_scan = sas_user_scan;
1826
1827         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1828         i->t.host_attrs.ac.class = &sas_host_class.class;
1829         i->t.host_attrs.ac.match = sas_host_match;
1830         transport_container_register(&i->t.host_attrs);
1831         i->t.host_size = sizeof(struct sas_host_attrs);
1832
1833         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1834         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1835         i->phy_attr_cont.ac.match = sas_phy_match;
1836         transport_container_register(&i->phy_attr_cont);
1837
1838         i->port_attr_cont.ac.class = &sas_port_class.class;
1839         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1840         i->port_attr_cont.ac.match = sas_port_match;
1841         transport_container_register(&i->port_attr_cont);
1842
1843         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1844         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1845         i->rphy_attr_cont.ac.match = sas_rphy_match;
1846         transport_container_register(&i->rphy_attr_cont);
1847
1848         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1849         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1850         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1851         transport_container_register(&i->end_dev_attr_cont);
1852
1853         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1854         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1855         i->expander_attr_cont.ac.match = sas_expander_match;
1856         transport_container_register(&i->expander_attr_cont);
1857
1858         i->f = ft;
1859
1860         count = 0;
1861         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1862         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1863         SETUP_PHY_ATTRIBUTE(device_type);
1864         SETUP_PHY_ATTRIBUTE(sas_address);
1865         SETUP_PHY_ATTRIBUTE(phy_identifier);
1866         //SETUP_PHY_ATTRIBUTE(port_identifier);
1867         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1868         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1869         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1870         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1871         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1872
1873         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1874         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1875         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1876         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1877         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1878         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1879         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1880         i->phy_attrs[count] = NULL;
1881
1882         count = 0;
1883         SETUP_PORT_ATTRIBUTE(num_phys);
1884         i->port_attrs[count] = NULL;
1885
1886         count = 0;
1887         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1888         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1889         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1890         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1891         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1892         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1893         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1894                                        get_enclosure_identifier);
1895         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1896                                        get_bay_identifier);
1897         i->rphy_attrs[count] = NULL;
1898
1899         count = 0;
1900         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1901         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1902         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1903         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1904         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1905         i->end_dev_attrs[count] = NULL;
1906
1907         count = 0;
1908         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1909         SETUP_EXPANDER_ATTRIBUTE(product_id);
1910         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1911         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1912         SETUP_EXPANDER_ATTRIBUTE(component_id);
1913         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1914         SETUP_EXPANDER_ATTRIBUTE(level);
1915         i->expander_attrs[count] = NULL;
1916
1917         return &i->t;
1918 }
1919 EXPORT_SYMBOL(sas_attach_transport);
1920
1921 /**
1922  * sas_release_transport  -  release SAS transport template instance
1923  * @t:          transport template instance
1924  */
1925 void sas_release_transport(struct scsi_transport_template *t)
1926 {
1927         struct sas_internal *i = to_sas_internal(t);
1928
1929         transport_container_unregister(&i->t.host_attrs);
1930         transport_container_unregister(&i->phy_attr_cont);
1931         transport_container_unregister(&i->port_attr_cont);
1932         transport_container_unregister(&i->rphy_attr_cont);
1933         transport_container_unregister(&i->end_dev_attr_cont);
1934         transport_container_unregister(&i->expander_attr_cont);
1935
1936         kfree(i);
1937 }
1938 EXPORT_SYMBOL(sas_release_transport);
1939
1940 static __init int sas_transport_init(void)
1941 {
1942         int error;
1943
1944         error = transport_class_register(&sas_host_class);
1945         if (error)
1946                 goto out;
1947         error = transport_class_register(&sas_phy_class);
1948         if (error)
1949                 goto out_unregister_transport;
1950         error = transport_class_register(&sas_port_class);
1951         if (error)
1952                 goto out_unregister_phy;
1953         error = transport_class_register(&sas_rphy_class);
1954         if (error)
1955                 goto out_unregister_port;
1956         error = transport_class_register(&sas_end_dev_class);
1957         if (error)
1958                 goto out_unregister_rphy;
1959         error = transport_class_register(&sas_expander_class);
1960         if (error)
1961                 goto out_unregister_end_dev;
1962
1963         return 0;
1964
1965  out_unregister_end_dev:
1966         transport_class_unregister(&sas_end_dev_class);
1967  out_unregister_rphy:
1968         transport_class_unregister(&sas_rphy_class);
1969  out_unregister_port:
1970         transport_class_unregister(&sas_port_class);
1971  out_unregister_phy:
1972         transport_class_unregister(&sas_phy_class);
1973  out_unregister_transport:
1974         transport_class_unregister(&sas_host_class);
1975  out:
1976         return error;
1977
1978 }
1979
1980 static void __exit sas_transport_exit(void)
1981 {
1982         transport_class_unregister(&sas_host_class);
1983         transport_class_unregister(&sas_phy_class);
1984         transport_class_unregister(&sas_port_class);
1985         transport_class_unregister(&sas_rphy_class);
1986         transport_class_unregister(&sas_end_dev_class);
1987         transport_class_unregister(&sas_expander_class);
1988 }
1989
1990 MODULE_AUTHOR("Christoph Hellwig");
1991 MODULE_DESCRIPTION("SAS Transport Attributes");
1992 MODULE_LICENSE("GPL");
1993
1994 module_init(sas_transport_init);
1995 module_exit(sas_transport_exit);