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         blk_status_t 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         queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
 268         return 0;
 269
 270 out_cleanup_queue:
 271         blk_cleanup_queue(q);
 272         return error;
 273 }
 274
 275 static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
 276 {
 277         struct request_queue *q;
 278
 279         if (rphy)
 280                 q = rphy->q;
 281         else
 282                 q = to_sas_host_attrs(shost)->q;
 283
 284         if (!q)
 285                 return;
 286
 287         bsg_unregister_queue(q);
 288 }
 289
 290 /*
 291  * SAS host attributes
 292  */
 293
 294 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 295                           struct device *cdev)
 296 {
 297         struct Scsi_Host *shost = dev_to_shost(dev);
 298         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 299
 300         INIT_LIST_HEAD(&sas_host->rphy_list);
 301         mutex_init(&sas_host->lock);
 302         sas_host->next_target_id = 0;
 303         sas_host->next_expander_id = 0;
 304         sas_host->next_port_id = 0;
 305
 306         if (sas_bsg_initialize(shost, NULL))
 307                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 308                            shost->host_no);
 309
 310         return 0;
 311 }
 312
 313 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 314                            struct device *cdev)
 315 {
 316         struct Scsi_Host *shost = dev_to_shost(dev);
 317
 318         sas_bsg_remove(shost, NULL);
 319
 320         return 0;
 321 }
 322
 323 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 324                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 325
 326 static int sas_host_match(struct attribute_container *cont,
 327                             struct device *dev)
 328 {
 329         struct Scsi_Host *shost;
 330         struct sas_internal *i;
 331
 332         if (!scsi_is_host_device(dev))
 333                 return 0;
 334         shost = dev_to_shost(dev);
 335
 336         if (!shost->transportt)
 337                 return 0;
 338         if (shost->transportt->host_attrs.ac.class !=
 339                         &sas_host_class.class)
 340                 return 0;
 341
 342         i = to_sas_internal(shost->transportt);
 343         return &i->t.host_attrs.ac == cont;
 344 }
 345
 346 static int do_sas_phy_delete(struct device *dev, void *data)
 347 {
 348         int pass = (int)(unsigned long)data;
 349
 350         if (pass == 0 && scsi_is_sas_port(dev))
 351                 sas_port_delete(dev_to_sas_port(dev));
 352         else if (pass == 1 && scsi_is_sas_phy(dev))
 353                 sas_phy_delete(dev_to_phy(dev));
 354         return 0;
 355 }
 356
 357 /**
 358  * sas_remove_children  -  tear down a devices SAS data structures
 359  * @dev:        device belonging to the sas object
 360  *
 361  * Removes all SAS PHYs and remote PHYs for a given object
 362  */
 363 void sas_remove_children(struct device *dev)
 364 {
 365         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 366         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 367 }
 368 EXPORT_SYMBOL(sas_remove_children);
 369
 370 /**
 371  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 372  * @shost:      Scsi Host that is torn down
 373  *
 374  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
 375  * Scsi_Host as well.
 376  *
 377  * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
 378  * already removed.
 379  */
 380 void sas_remove_host(struct Scsi_Host *shost)
 381 {
 382         sas_remove_children(&shost->shost_gendev);
 383         scsi_remove_host(shost);
 384 }
 385 EXPORT_SYMBOL(sas_remove_host);
 386
 387 /**
 388  * sas_get_address - return the SAS address of the device
 389  * @sdev: scsi device
 390  *
 391  * Returns the SAS address of the scsi device
 392  */
 393 u64 sas_get_address(struct scsi_device *sdev)
 394 {
 395         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 396
 397         return rdev->rphy.identify.sas_address;
 398 }
 399 EXPORT_SYMBOL(sas_get_address);
 400
 401 /**
 402  * sas_tlr_supported - checking TLR bit in vpd 0x90
 403  * @sdev: scsi device struct
 404  *
 405  * Check Transport Layer Retries are supported or not.
 406  * If vpd page 0x90 is present, TRL is supported.
 407  *
 408  */
 409 unsigned int
 410 sas_tlr_supported(struct scsi_device *sdev)
 411 {
 412         const int vpd_len = 32;
 413         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 414         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 415         int ret = 0;
 416
 417         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 418                 goto out;
 419
 420         /*
 421          * Magic numbers: the VPD Protocol page (0x90)
 422          * has a 4 byte header and then one entry per device port
 423          * the TLR bit is at offset 8 on each port entry
 424          * if we take the first port, that's at total offset 12
 425          */
 426         ret = buffer[12] & 0x01;
 427
 428  out:
 429         kfree(buffer);
 430         rdev->tlr_supported = ret;
 431         return ret;
 432
 433 }
 434 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 435
 436 /**
 437  * sas_disable_tlr - setting TLR flags
 438  * @sdev: scsi device struct
 439  *
 440  * Seting tlr_enabled flag to 0.
 441  *
 442  */
 443 void
 444 sas_disable_tlr(struct scsi_device *sdev)
 445 {
 446         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 447
 448         rdev->tlr_enabled = 0;
 449 }
 450 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 451
 452 /**
 453  * sas_enable_tlr - setting TLR flags
 454  * @sdev: scsi device struct
 455  *
 456  * Seting tlr_enabled flag 1.
 457  *
 458  */
 459 void sas_enable_tlr(struct scsi_device *sdev)
 460 {
 461         unsigned int tlr_supported = 0;
 462         tlr_supported  = sas_tlr_supported(sdev);
 463
 464         if (tlr_supported) {
 465                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 466
 467                 rdev->tlr_enabled = 1;
 468         }
 469
 470         return;
 471 }
 472 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 473
 474 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 475 {
 476         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 477         return rdev->tlr_enabled;
 478 }
 479 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 480
 481 /*
 482  * SAS Phy attributes
 483  */
 484
 485 #define sas_phy_show_simple(field, name, format_string, cast)           \
 486 static ssize_t                                                          \
 487 show_sas_phy_##name(struct device *dev,                                 \
 488                     struct device_attribute *attr, char *buf)           \
 489 {                                                                       \
 490         struct sas_phy *phy = transport_class_to_phy(dev);              \
 491                                                                         \
 492         return snprintf(buf, 20, format_string, cast phy->field);       \
 493 }
 494
 495 #define sas_phy_simple_attr(field, name, format_string, type)           \
 496         sas_phy_show_simple(field, name, format_string, (type)) \
 497 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 498
 499 #define sas_phy_show_protocol(field, name)                              \
 500 static ssize_t                                                          \
 501 show_sas_phy_##name(struct device *dev,                                 \
 502                     struct device_attribute *attr, char *buf)           \
 503 {                                                                       \
 504         struct sas_phy *phy = transport_class_to_phy(dev);              \
 505                                                                         \
 506         if (!phy->field)                                                \
 507                 return snprintf(buf, 20, "none\n");                     \
 508         return get_sas_protocol_names(phy->field, buf);         \
 509 }
 510
 511 #define sas_phy_protocol_attr(field, name)                              \
 512         sas_phy_show_protocol(field, name)                              \
 513 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 514
 515 #define sas_phy_show_linkspeed(field)                                   \
 516 static ssize_t                                                          \
 517 show_sas_phy_##field(struct device *dev,                                \
 518                      struct device_attribute *attr, char *buf)          \
 519 {                                                                       \
 520         struct sas_phy *phy = transport_class_to_phy(dev);              \
 521                                                                         \
 522         return get_sas_linkspeed_names(phy->field, buf);                \
 523 }
 524
 525 /* Fudge to tell if we're minimum or maximum */
 526 #define sas_phy_store_linkspeed(field)                                  \
 527 static ssize_t                                                          \
 528 store_sas_phy_##field(struct device *dev,                               \
 529                       struct device_attribute *attr,                    \
 530                       const char *buf,  size_t count)                   \
 531 {                                                                       \
 532         struct sas_phy *phy = transport_class_to_phy(dev);              \
 533         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 534         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 535         u32 value;                                                      \
 536         struct sas_phy_linkrates rates = {0};                           \
 537         int error;                                                      \
 538                                                                         \
 539         error = set_sas_linkspeed_names(&value, buf);                   \
 540         if (error)                                                      \
 541                 return error;                                           \
 542         rates.field = value;                                            \
 543         error = i->f->set_phy_speed(phy, &rates);                       \
 544                                                                         \
 545         return error ? error : count;                                   \
 546 }
 547
 548 #define sas_phy_linkspeed_rw_attr(field)                                \
 549         sas_phy_show_linkspeed(field)                                   \
 550         sas_phy_store_linkspeed(field)                                  \
 551 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 552         store_sas_phy_##field)
 553
 554 #define sas_phy_linkspeed_attr(field)                                   \
 555         sas_phy_show_linkspeed(field)                                   \
 556 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 557
 558
 559 #define sas_phy_show_linkerror(field)                                   \
 560 static ssize_t                                                          \
 561 show_sas_phy_##field(struct device *dev,                                \
 562                      struct device_attribute *attr, char *buf)          \
 563 {                                                                       \
 564         struct sas_phy *phy = transport_class_to_phy(dev);              \
 565         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 566         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 567         int error;                                                      \
 568                                                                         \
 569         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 570         if (error)                                                      \
 571                 return error;                                           \
 572         return snprintf(buf, 20, "%u\n", phy->field);                   \
 573 }
 574
 575 #define sas_phy_linkerror_attr(field)                                   \
 576         sas_phy_show_linkerror(field)                                   \
 577 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 578
 579
 580 static ssize_t
 581 show_sas_device_type(struct device *dev,
 582                      struct device_attribute *attr, char *buf)
 583 {
 584         struct sas_phy *phy = transport_class_to_phy(dev);
 585
 586         if (!phy->identify.device_type)
 587                 return snprintf(buf, 20, "none\n");
 588         return get_sas_device_type_names(phy->identify.device_type, buf);
 589 }
 590 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 591
 592 static ssize_t do_sas_phy_enable(struct device *dev,
 593                 size_t count, int enable)
 594 {
 595         struct sas_phy *phy = transport_class_to_phy(dev);
 596         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 597         struct sas_internal *i = to_sas_internal(shost->transportt);
 598         int error;
 599
 600         error = i->f->phy_enable(phy, enable);
 601         if (error)
 602                 return error;
 603         phy->enabled = enable;
 604         return count;
 605 };
 606
 607 static ssize_t
 608 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 609                      const char *buf, size_t count)
 610 {
 611         if (count < 1)
 612                 return -EINVAL;
 613
 614         switch (buf[0]) {
 615         case '0':
 616                 do_sas_phy_enable(dev, count, 0);
 617                 break;
 618         case '1':
 619                 do_sas_phy_enable(dev, count, 1);
 620                 break;
 621         default:
 622                 return -EINVAL;
 623         }
 624
 625         return count;
 626 }
 627
 628 static ssize_t
 629 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 630                     char *buf)
 631 {
 632         struct sas_phy *phy = transport_class_to_phy(dev);
 633
 634         return snprintf(buf, 20, "%d", phy->enabled);
 635 }
 636
 637 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 638                          store_sas_phy_enable);
 639
 640 static ssize_t
 641 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 642 {
 643         struct sas_phy *phy = transport_class_to_phy(dev);
 644         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 645         struct sas_internal *i = to_sas_internal(shost->transportt);
 646         int error;
 647
 648         error = i->f->phy_reset(phy, hard_reset);
 649         if (error)
 650                 return error;
 651         phy->enabled = 1;
 652         return count;
 653 };
 654
 655 static ssize_t
 656 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 657                      const char *buf, size_t count)
 658 {
 659         return do_sas_phy_reset(dev, count, 0);
 660 }
 661 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 662
 663 static ssize_t
 664 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 665                      const char *buf, size_t count)
 666 {
 667         return do_sas_phy_reset(dev, count, 1);
 668 }
 669 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 670
 671 sas_phy_protocol_attr(identify.initiator_port_protocols,
 672                 initiator_port_protocols);
 673 sas_phy_protocol_attr(identify.target_port_protocols,
 674                 target_port_protocols);
 675 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 676                 unsigned long long);
 677 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 678 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 679 sas_phy_linkspeed_attr(negotiated_linkrate);
 680 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 681 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 682 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 683 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 684 sas_phy_linkerror_attr(invalid_dword_count);
 685 sas_phy_linkerror_attr(running_disparity_error_count);
 686 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 687 sas_phy_linkerror_attr(phy_reset_problem_count);
 688
 689 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 690                          struct device *cdev)
 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_setup)
 697                 i->f->phy_setup(phy);
 698
 699         return 0;
 700 }
 701
 702 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 703                 "sas_phy", sas_phy_setup, NULL, NULL);
 704
 705 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 706 {
 707         struct Scsi_Host *shost;
 708         struct sas_internal *i;
 709
 710         if (!scsi_is_sas_phy(dev))
 711                 return 0;
 712         shost = dev_to_shost(dev->parent);
 713
 714         if (!shost->transportt)
 715                 return 0;
 716         if (shost->transportt->host_attrs.ac.class !=
 717                         &sas_host_class.class)
 718                 return 0;
 719
 720         i = to_sas_internal(shost->transportt);
 721         return &i->phy_attr_cont.ac == cont;
 722 }
 723
 724 static void sas_phy_release(struct device *dev)
 725 {
 726         struct sas_phy *phy = dev_to_phy(dev);
 727         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 728         struct sas_internal *i = to_sas_internal(shost->transportt);
 729
 730         if (i->f->phy_release)
 731                 i->f->phy_release(phy);
 732         put_device(dev->parent);
 733         kfree(phy);
 734 }
 735
 736 /**
 737  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 738  * @parent:     Parent device
 739  * @number:     Phy index
 740  *
 741  * Allocates an SAS PHY structure.  It will be added in the device tree
 742  * below the device specified by @parent, which has to be either a Scsi_Host
 743  * or sas_rphy.
 744  *
 745  * Returns:
 746  *      SAS PHY allocated or %NULL if the allocation failed.
 747  */
 748 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 749 {
 750         struct Scsi_Host *shost = dev_to_shost(parent);
 751         struct sas_phy *phy;
 752
 753         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 754         if (!phy)
 755                 return NULL;
 756
 757         phy->number = number;
 758         phy->enabled = 1;
 759
 760         device_initialize(&phy->dev);
 761         phy->dev.parent = get_device(parent);
 762         phy->dev.release = sas_phy_release;
 763         INIT_LIST_HEAD(&phy->port_siblings);
 764         if (scsi_is_sas_expander_device(parent)) {
 765                 struct sas_rphy *rphy = dev_to_rphy(parent);
 766                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 767                         rphy->scsi_target_id, number);
 768         } else
 769                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 770
 771         transport_setup_device(&phy->dev);
 772
 773         return phy;
 774 }
 775 EXPORT_SYMBOL(sas_phy_alloc);
 776
 777 /**
 778  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 779  * @phy:        The PHY to be added
 780  *
 781  * Publishes a SAS PHY to the rest of the system.
 782  */
 783 int sas_phy_add(struct sas_phy *phy)
 784 {
 785         int error;
 786
 787         error = device_add(&phy->dev);
 788         if (!error) {
 789                 transport_add_device(&phy->dev);
 790                 transport_configure_device(&phy->dev);
 791         }
 792
 793         return error;
 794 }
 795 EXPORT_SYMBOL(sas_phy_add);
 796
 797 /**
 798  * sas_phy_free  -  free a SAS PHY
 799  * @phy:        SAS PHY to free
 800  *
 801  * Frees the specified SAS PHY.
 802  *
 803  * Note:
 804  *   This function must only be called on a PHY that has not
 805  *   successfully been added using sas_phy_add().
 806  */
 807 void sas_phy_free(struct sas_phy *phy)
 808 {
 809         transport_destroy_device(&phy->dev);
 810         put_device(&phy->dev);
 811 }
 812 EXPORT_SYMBOL(sas_phy_free);
 813
 814 /**
 815  * sas_phy_delete  -  remove SAS PHY
 816  * @phy:        SAS PHY to remove
 817  *
 818  * Removes the specified SAS PHY.  If the SAS PHY has an
 819  * associated remote PHY it is removed before.
 820  */
 821 void
 822 sas_phy_delete(struct sas_phy *phy)
 823 {
 824         struct device *dev = &phy->dev;
 825
 826         /* this happens if the phy is still part of a port when deleted */
 827         BUG_ON(!list_empty(&phy->port_siblings));
 828
 829         transport_remove_device(dev);
 830         device_del(dev);
 831         transport_destroy_device(dev);
 832         put_device(dev);
 833 }
 834 EXPORT_SYMBOL(sas_phy_delete);
 835
 836 /**
 837  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 838  * @dev:        device to check
 839  *
 840  * Returns:
 841  *      %1 if the device represents a SAS PHY, %0 else
 842  */
 843 int scsi_is_sas_phy(const struct device *dev)
 844 {
 845         return dev->release == sas_phy_release;
 846 }
 847 EXPORT_SYMBOL(scsi_is_sas_phy);
 848
 849 /*
 850  * SAS Port attributes
 851  */
 852 #define sas_port_show_simple(field, name, format_string, cast)          \
 853 static ssize_t                                                          \
 854 show_sas_port_##name(struct device *dev,                                \
 855                      struct device_attribute *attr, char *buf)          \
 856 {                                                                       \
 857         struct sas_port *port = transport_class_to_sas_port(dev);       \
 858                                                                         \
 859         return snprintf(buf, 20, format_string, cast port->field);      \
 860 }
 861
 862 #define sas_port_simple_attr(field, name, format_string, type)          \
 863         sas_port_show_simple(field, name, format_string, (type))        \
 864 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 865
 866 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 867
 868 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 869                                "sas_port", NULL, NULL, NULL);
 870
 871 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 872 {
 873         struct Scsi_Host *shost;
 874         struct sas_internal *i;
 875
 876         if (!scsi_is_sas_port(dev))
 877                 return 0;
 878         shost = dev_to_shost(dev->parent);
 879
 880         if (!shost->transportt)
 881                 return 0;
 882         if (shost->transportt->host_attrs.ac.class !=
 883                         &sas_host_class.class)
 884                 return 0;
 885
 886         i = to_sas_internal(shost->transportt);
 887         return &i->port_attr_cont.ac == cont;
 888 }
 889
 890
 891 static void sas_port_release(struct device *dev)
 892 {
 893         struct sas_port *port = dev_to_sas_port(dev);
 894
 895         BUG_ON(!list_empty(&port->phy_list));
 896
 897         put_device(dev->parent);
 898         kfree(port);
 899 }
 900
 901 static void sas_port_create_link(struct sas_port *port,
 902                                  struct sas_phy *phy)
 903 {
 904         int res;
 905
 906         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 907                                 dev_name(&phy->dev));
 908         if (res)
 909                 goto err;
 910         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 911         if (res)
 912                 goto err;
 913         return;
 914 err:
 915         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 916                __func__, res);
 917 }
 918
 919 static void sas_port_delete_link(struct sas_port *port,
 920                                  struct sas_phy *phy)
 921 {
 922         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 923         sysfs_remove_link(&phy->dev.kobj, "port");
 924 }
 925
 926 /** sas_port_alloc - allocate and initialize a SAS port structure
 927  *
 928  * @parent:     parent device
 929  * @port_id:    port number
 930  *
 931  * Allocates a SAS port structure.  It will be added to the device tree
 932  * below the device specified by @parent which must be either a Scsi_Host
 933  * or a sas_expander_device.
 934  *
 935  * Returns %NULL on error
 936  */
 937 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 938 {
 939         struct Scsi_Host *shost = dev_to_shost(parent);
 940         struct sas_port *port;
 941
 942         port = kzalloc(sizeof(*port), GFP_KERNEL);
 943         if (!port)
 944                 return NULL;
 945
 946         port->port_identifier = port_id;
 947
 948         device_initialize(&port->dev);
 949
 950         port->dev.parent = get_device(parent);
 951         port->dev.release = sas_port_release;
 952
 953         mutex_init(&port->phy_list_mutex);
 954         INIT_LIST_HEAD(&port->phy_list);
 955
 956         if (scsi_is_sas_expander_device(parent)) {
 957                 struct sas_rphy *rphy = dev_to_rphy(parent);
 958                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 959                              rphy->scsi_target_id, port->port_identifier);
 960         } else
 961                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 962                              port->port_identifier);
 963
 964         transport_setup_device(&port->dev);
 965
 966         return port;
 967 }
 968 EXPORT_SYMBOL(sas_port_alloc);
 969
 970 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 971  *
 972  * @parent:     parent device
 973  *
 974  * Allocates a SAS port structure and a number to go with it.  This
 975  * interface is really for adapters where the port number has no
 976  * meansing, so the sas class should manage them.  It will be added to
 977  * the device tree below the device specified by @parent which must be
 978  * either a Scsi_Host or a sas_expander_device.
 979  *
 980  * Returns %NULL on error
 981  */
 982 struct sas_port *sas_port_alloc_num(struct device *parent)
 983 {
 984         int index;
 985         struct Scsi_Host *shost = dev_to_shost(parent);
 986         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 987
 988         /* FIXME: use idr for this eventually */
 989         mutex_lock(&sas_host->lock);
 990         if (scsi_is_sas_expander_device(parent)) {
 991                 struct sas_rphy *rphy = dev_to_rphy(parent);
 992                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 993
 994                 index = exp->next_port_id++;
 995         } else
 996                 index = sas_host->next_port_id++;
 997         mutex_unlock(&sas_host->lock);
 998         return sas_port_alloc(parent, index);
 999 }
1000 EXPORT_SYMBOL(sas_port_alloc_num);
1001
1002 /**
1003  * sas_port_add - add a SAS port to the device hierarchy
1004  * @port:       port to be added
1005  *
1006  * publishes a port to the rest of the system
1007  */
1008 int sas_port_add(struct sas_port *port)
1009 {
1010         int error;
1011
1012         /* No phys should be added until this is made visible */
1013         BUG_ON(!list_empty(&port->phy_list));
1014
1015         error = device_add(&port->dev);
1016
1017         if (error)
1018                 return error;
1019
1020         transport_add_device(&port->dev);
1021         transport_configure_device(&port->dev);
1022
1023         return 0;
1024 }
1025 EXPORT_SYMBOL(sas_port_add);
1026
1027 /**
1028  * sas_port_free  -  free a SAS PORT
1029  * @port:       SAS PORT to free
1030  *
1031  * Frees the specified SAS PORT.
1032  *
1033  * Note:
1034  *   This function must only be called on a PORT that has not
1035  *   successfully been added using sas_port_add().
1036  */
1037 void sas_port_free(struct sas_port *port)
1038 {
1039         transport_destroy_device(&port->dev);
1040         put_device(&port->dev);
1041 }
1042 EXPORT_SYMBOL(sas_port_free);
1043
1044 /**
1045  * sas_port_delete  -  remove SAS PORT
1046  * @port:       SAS PORT to remove
1047  *
1048  * Removes the specified SAS PORT.  If the SAS PORT has an
1049  * associated phys, unlink them from the port as well.
1050  */
1051 void sas_port_delete(struct sas_port *port)
1052 {
1053         struct device *dev = &port->dev;
1054         struct sas_phy *phy, *tmp_phy;
1055
1056         if (port->rphy) {
1057                 sas_rphy_delete(port->rphy);
1058                 port->rphy = NULL;
1059         }
1060
1061         mutex_lock(&port->phy_list_mutex);
1062         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1063                                  port_siblings) {
1064                 sas_port_delete_link(port, phy);
1065                 list_del_init(&phy->port_siblings);
1066         }
1067         mutex_unlock(&port->phy_list_mutex);
1068
1069         if (port->is_backlink) {
1070                 struct device *parent = port->dev.parent;
1071
1072                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1073                 port->is_backlink = 0;
1074         }
1075
1076         transport_remove_device(dev);
1077         device_del(dev);
1078         transport_destroy_device(dev);
1079         put_device(dev);
1080 }
1081 EXPORT_SYMBOL(sas_port_delete);
1082
1083 /**
1084  * scsi_is_sas_port -  check if a struct device represents a SAS port
1085  * @dev:        device to check
1086  *
1087  * Returns:
1088  *      %1 if the device represents a SAS Port, %0 else
1089  */
1090 int scsi_is_sas_port(const struct device *dev)
1091 {
1092         return dev->release == sas_port_release;
1093 }
1094 EXPORT_SYMBOL(scsi_is_sas_port);
1095
1096 /**
1097  * sas_port_get_phy - try to take a reference on a port member
1098  * @port: port to check
1099  */
1100 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1101 {
1102         struct sas_phy *phy;
1103
1104         mutex_lock(&port->phy_list_mutex);
1105         if (list_empty(&port->phy_list))
1106                 phy = NULL;
1107         else {
1108                 struct list_head *ent = port->phy_list.next;
1109
1110                 phy = list_entry(ent, typeof(*phy), port_siblings);
1111                 get_device(&phy->dev);
1112         }
1113         mutex_unlock(&port->phy_list_mutex);
1114
1115         return phy;
1116 }
1117 EXPORT_SYMBOL(sas_port_get_phy);
1118
1119 /**
1120  * sas_port_add_phy - add another phy to a port to form a wide port
1121  * @port:       port to add the phy to
1122  * @phy:        phy to add
1123  *
1124  * When a port is initially created, it is empty (has no phys).  All
1125  * ports must have at least one phy to operated, and all wide ports
1126  * must have at least two.  The current code makes no difference
1127  * between ports and wide ports, but the only object that can be
1128  * connected to a remote device is a port, so ports must be formed on
1129  * all devices with phys if they're connected to anything.
1130  */
1131 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1132 {
1133         mutex_lock(&port->phy_list_mutex);
1134         if (unlikely(!list_empty(&phy->port_siblings))) {
1135                 /* make sure we're already on this port */
1136                 struct sas_phy *tmp;
1137
1138                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1139                         if (tmp == phy)
1140                                 break;
1141                 /* If this trips, you added a phy that was already
1142                  * part of a different port */
1143                 if (unlikely(tmp != phy)) {
1144                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1145                                    dev_name(&phy->dev));
1146                         BUG();
1147                 }
1148         } else {
1149                 sas_port_create_link(port, phy);
1150                 list_add_tail(&phy->port_siblings, &port->phy_list);
1151                 port->num_phys++;
1152         }
1153         mutex_unlock(&port->phy_list_mutex);
1154 }
1155 EXPORT_SYMBOL(sas_port_add_phy);
1156
1157 /**
1158  * sas_port_delete_phy - remove a phy from a port or wide port
1159  * @port:       port to remove the phy from
1160  * @phy:        phy to remove
1161  *
1162  * This operation is used for tearing down ports again.  It must be
1163  * done to every port or wide port before calling sas_port_delete.
1164  */
1165 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1166 {
1167         mutex_lock(&port->phy_list_mutex);
1168         sas_port_delete_link(port, phy);
1169         list_del_init(&phy->port_siblings);
1170         port->num_phys--;
1171         mutex_unlock(&port->phy_list_mutex);
1172 }
1173 EXPORT_SYMBOL(sas_port_delete_phy);
1174
1175 void sas_port_mark_backlink(struct sas_port *port)
1176 {
1177         int res;
1178         struct device *parent = port->dev.parent->parent->parent;
1179
1180         if (port->is_backlink)
1181                 return;
1182         port->is_backlink = 1;
1183         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1184                                 dev_name(parent));
1185         if (res)
1186                 goto err;
1187         return;
1188 err:
1189         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1190                __func__, res);
1191
1192 }
1193 EXPORT_SYMBOL(sas_port_mark_backlink);
1194
1195 /*
1196  * SAS remote PHY attributes.
1197  */
1198
1199 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1200 static ssize_t                                                          \
1201 show_sas_rphy_##name(struct device *dev,                                \
1202                      struct device_attribute *attr, char *buf)          \
1203 {                                                                       \
1204         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1205                                                                         \
1206         return snprintf(buf, 20, format_string, cast rphy->field);      \
1207 }
1208
1209 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1210         sas_rphy_show_simple(field, name, format_string, (type))        \
1211 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1212                 show_sas_rphy_##name, NULL)
1213
1214 #define sas_rphy_show_protocol(field, name)                             \
1215 static ssize_t                                                          \
1216 show_sas_rphy_##name(struct device *dev,                                \
1217                      struct device_attribute *attr, char *buf)          \
1218 {                                                                       \
1219         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1220                                                                         \
1221         if (!rphy->field)                                       \
1222                 return snprintf(buf, 20, "none\n");                     \
1223         return get_sas_protocol_names(rphy->field, buf);        \
1224 }
1225
1226 #define sas_rphy_protocol_attr(field, name)                             \
1227         sas_rphy_show_protocol(field, name)                             \
1228 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1229                 show_sas_rphy_##name, NULL)
1230
1231 static ssize_t
1232 show_sas_rphy_device_type(struct device *dev,
1233                           struct device_attribute *attr, char *buf)
1234 {
1235         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1236
1237         if (!rphy->identify.device_type)
1238                 return snprintf(buf, 20, "none\n");
1239         return get_sas_device_type_names(
1240                         rphy->identify.device_type, buf);
1241 }
1242
1243 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1244                 show_sas_rphy_device_type, NULL);
1245
1246 static ssize_t
1247 show_sas_rphy_enclosure_identifier(struct device *dev,
1248                                    struct device_attribute *attr, char *buf)
1249 {
1250         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1251         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1252         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1253         struct sas_internal *i = to_sas_internal(shost->transportt);
1254         u64 identifier;
1255         int error;
1256
1257         error = i->f->get_enclosure_identifier(rphy, &identifier);
1258         if (error)
1259                 return error;
1260         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1261 }
1262
1263 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1264                 show_sas_rphy_enclosure_identifier, NULL);
1265
1266 static ssize_t
1267 show_sas_rphy_bay_identifier(struct device *dev,
1268                              struct device_attribute *attr, char *buf)
1269 {
1270         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1271         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1272         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1273         struct sas_internal *i = to_sas_internal(shost->transportt);
1274         int val;
1275
1276         val = i->f->get_bay_identifier(rphy);
1277         if (val < 0)
1278                 return val;
1279         return sprintf(buf, "%d\n", val);
1280 }
1281
1282 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1283                 show_sas_rphy_bay_identifier, NULL);
1284
1285 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1286                 initiator_port_protocols);
1287 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1288 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1289                 unsigned long long);
1290 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1291 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1292
1293 /* only need 8 bytes of data plus header (4 or 8) */
1294 #define BUF_SIZE 64
1295
1296 int sas_read_port_mode_page(struct scsi_device *sdev)
1297 {
1298         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1299         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1300         struct scsi_mode_data mode_data;
1301         int res, error;
1302
1303         if (!buffer)
1304                 return -ENOMEM;
1305
1306         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1307                               &mode_data, NULL);
1308
1309         error = -EINVAL;
1310         if (!scsi_status_is_good(res))
1311                 goto out;
1312
1313         msdata = buffer +  mode_data.header_length +
1314                 mode_data.block_descriptor_length;
1315
1316         if (msdata - buffer > BUF_SIZE - 8)
1317                 goto out;
1318
1319         error = 0;
1320
1321         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1322         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1323         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1324
1325  out:
1326         kfree(buffer);
1327         return error;
1328 }
1329 EXPORT_SYMBOL(sas_read_port_mode_page);
1330
1331 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1332                                "sas_end_device", NULL, NULL, NULL);
1333
1334 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1335 static ssize_t                                                          \
1336 show_sas_end_dev_##name(struct device *dev,                             \
1337                         struct device_attribute *attr, char *buf)       \
1338 {                                                                       \
1339         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1340         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1341                                                                         \
1342         return snprintf(buf, 20, format_string, cast rdev->field);      \
1343 }
1344
1345 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1346         sas_end_dev_show_simple(field, name, format_string, (type))     \
1347 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1348                 show_sas_end_dev_##name, NULL)
1349
1350 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1351 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1352                         "%d\n", int);
1353 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1354                         "%d\n", int);
1355 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1356                         "%d\n", int);
1357 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1358                         "%d\n", int);
1359
1360 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1361                                "sas_expander", NULL, NULL, NULL);
1362
1363 #define sas_expander_show_simple(field, name, format_string, cast)      \
1364 static ssize_t                                                          \
1365 show_sas_expander_##name(struct device *dev,                            \
1366                          struct device_attribute *attr, char *buf)      \
1367 {                                                                       \
1368         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1369         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1370                                                                         \
1371         return snprintf(buf, 20, format_string, cast edev->field);      \
1372 }
1373
1374 #define sas_expander_simple_attr(field, name, format_string, type)      \
1375         sas_expander_show_simple(field, name, format_string, (type))    \
1376 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1377                 show_sas_expander_##name, NULL)
1378
1379 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1380 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1381 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1382 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1383                          "%s\n", char *);
1384 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1385 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1386                          unsigned int);
1387 sas_expander_simple_attr(level, level, "%d\n", int);
1388
1389 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1390                 "sas_device", NULL, NULL, NULL);
1391
1392 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1393 {
1394         struct Scsi_Host *shost;
1395         struct sas_internal *i;
1396
1397         if (!scsi_is_sas_rphy(dev))
1398                 return 0;
1399         shost = dev_to_shost(dev->parent->parent);
1400
1401         if (!shost->transportt)
1402                 return 0;
1403         if (shost->transportt->host_attrs.ac.class !=
1404                         &sas_host_class.class)
1405                 return 0;
1406
1407         i = to_sas_internal(shost->transportt);
1408         return &i->rphy_attr_cont.ac == cont;
1409 }
1410
1411 static int sas_end_dev_match(struct attribute_container *cont,
1412                              struct device *dev)
1413 {
1414         struct Scsi_Host *shost;
1415         struct sas_internal *i;
1416         struct sas_rphy *rphy;
1417
1418         if (!scsi_is_sas_rphy(dev))
1419                 return 0;
1420         shost = dev_to_shost(dev->parent->parent);
1421         rphy = dev_to_rphy(dev);
1422
1423         if (!shost->transportt)
1424                 return 0;
1425         if (shost->transportt->host_attrs.ac.class !=
1426                         &sas_host_class.class)
1427                 return 0;
1428
1429         i = to_sas_internal(shost->transportt);
1430         return &i->end_dev_attr_cont.ac == cont &&
1431                 rphy->identify.device_type == SAS_END_DEVICE;
1432 }
1433
1434 static int sas_expander_match(struct attribute_container *cont,
1435                               struct device *dev)
1436 {
1437         struct Scsi_Host *shost;
1438         struct sas_internal *i;
1439         struct sas_rphy *rphy;
1440
1441         if (!scsi_is_sas_rphy(dev))
1442                 return 0;
1443         shost = dev_to_shost(dev->parent->parent);
1444         rphy = dev_to_rphy(dev);
1445
1446         if (!shost->transportt)
1447                 return 0;
1448         if (shost->transportt->host_attrs.ac.class !=
1449                         &sas_host_class.class)
1450                 return 0;
1451
1452         i = to_sas_internal(shost->transportt);
1453         return &i->expander_attr_cont.ac == cont &&
1454                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1455                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1456 }
1457
1458 static void sas_expander_release(struct device *dev)
1459 {
1460         struct sas_rphy *rphy = dev_to_rphy(dev);
1461         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1462
1463         if (rphy->q)
1464                 blk_cleanup_queue(rphy->q);
1465
1466         put_device(dev->parent);
1467         kfree(edev);
1468 }
1469
1470 static void sas_end_device_release(struct device *dev)
1471 {
1472         struct sas_rphy *rphy = dev_to_rphy(dev);
1473         struct sas_end_device *edev = rphy_to_end_device(rphy);
1474
1475         if (rphy->q)
1476                 blk_cleanup_queue(rphy->q);
1477
1478         put_device(dev->parent);
1479         kfree(edev);
1480 }
1481
1482 /**
1483  * sas_rphy_initialize - common rphy initialization
1484  * @rphy:       rphy to initialise
1485  *
1486  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1487  * initialise the common rphy component of each.
1488  */
1489 static void sas_rphy_initialize(struct sas_rphy *rphy)
1490 {
1491         INIT_LIST_HEAD(&rphy->list);
1492 }
1493
1494 /**
1495  * sas_end_device_alloc - allocate an rphy for an end device
1496  * @parent: which port
1497  *
1498  * Allocates an SAS remote PHY structure, connected to @parent.
1499  *
1500  * Returns:
1501  *      SAS PHY allocated or %NULL if the allocation failed.
1502  */
1503 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1504 {
1505         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1506         struct sas_end_device *rdev;
1507
1508         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1509         if (!rdev) {
1510                 return NULL;
1511         }
1512
1513         device_initialize(&rdev->rphy.dev);
1514         rdev->rphy.dev.parent = get_device(&parent->dev);
1515         rdev->rphy.dev.release = sas_end_device_release;
1516         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1517                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1518                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1519                              shost->host_no, rphy->scsi_target_id,
1520                              parent->port_identifier);
1521         } else
1522                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1523                              shost->host_no, parent->port_identifier);
1524         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1525         sas_rphy_initialize(&rdev->rphy);
1526         transport_setup_device(&rdev->rphy.dev);
1527
1528         return &rdev->rphy;
1529 }
1530 EXPORT_SYMBOL(sas_end_device_alloc);
1531
1532 /**
1533  * sas_expander_alloc - allocate an rphy for an end device
1534  * @parent: which port
1535  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1536  *
1537  * Allocates an SAS remote PHY structure, connected to @parent.
1538  *
1539  * Returns:
1540  *      SAS PHY allocated or %NULL if the allocation failed.
1541  */
1542 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1543                                     enum sas_device_type type)
1544 {
1545         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1546         struct sas_expander_device *rdev;
1547         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1548
1549         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1550                type != SAS_FANOUT_EXPANDER_DEVICE);
1551
1552         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1553         if (!rdev) {
1554                 return NULL;
1555         }
1556
1557         device_initialize(&rdev->rphy.dev);
1558         rdev->rphy.dev.parent = get_device(&parent->dev);
1559         rdev->rphy.dev.release = sas_expander_release;
1560         mutex_lock(&sas_host->lock);
1561         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1562         mutex_unlock(&sas_host->lock);
1563         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1564                      shost->host_no, rdev->rphy.scsi_target_id);
1565         rdev->rphy.identify.device_type = type;
1566         sas_rphy_initialize(&rdev->rphy);
1567         transport_setup_device(&rdev->rphy.dev);
1568
1569         return &rdev->rphy;
1570 }
1571 EXPORT_SYMBOL(sas_expander_alloc);
1572
1573 /**
1574  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1575  * @rphy:       The remote PHY to be added
1576  *
1577  * Publishes a SAS remote PHY to the rest of the system.
1578  */
1579 int sas_rphy_add(struct sas_rphy *rphy)
1580 {
1581         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1582         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1583         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1584         struct sas_identify *identify = &rphy->identify;
1585         int error;
1586
1587         if (parent->rphy)
1588                 return -ENXIO;
1589         parent->rphy = rphy;
1590
1591         error = device_add(&rphy->dev);
1592         if (error)
1593                 return error;
1594         transport_add_device(&rphy->dev);
1595         transport_configure_device(&rphy->dev);
1596         if (sas_bsg_initialize(shost, rphy))
1597                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1598
1599
1600         mutex_lock(&sas_host->lock);
1601         list_add_tail(&rphy->list, &sas_host->rphy_list);
1602         if (identify->device_type == SAS_END_DEVICE &&
1603             (identify->target_port_protocols &
1604              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1605                 rphy->scsi_target_id = sas_host->next_target_id++;
1606         else if (identify->device_type == SAS_END_DEVICE)
1607                 rphy->scsi_target_id = -1;
1608         mutex_unlock(&sas_host->lock);
1609
1610         if (identify->device_type == SAS_END_DEVICE &&
1611             rphy->scsi_target_id != -1) {
1612                 int lun;
1613
1614                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1615                         lun = SCAN_WILD_CARD;
1616                 else
1617                         lun = 0;
1618
1619                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1620                                  SCSI_SCAN_INITIAL);
1621         }
1622
1623         return 0;
1624 }
1625 EXPORT_SYMBOL(sas_rphy_add);
1626
1627 /**
1628  * sas_rphy_free  -  free a SAS remote PHY
1629  * @rphy: SAS remote PHY to free
1630  *
1631  * Frees the specified SAS remote PHY.
1632  *
1633  * Note:
1634  *   This function must only be called on a remote
1635  *   PHY that has not successfully been added using
1636  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1637  */
1638 void sas_rphy_free(struct sas_rphy *rphy)
1639 {
1640         struct device *dev = &rphy->dev;
1641         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1642         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1643
1644         mutex_lock(&sas_host->lock);
1645         list_del(&rphy->list);
1646         mutex_unlock(&sas_host->lock);
1647
1648         transport_destroy_device(dev);
1649
1650         put_device(dev);
1651 }
1652 EXPORT_SYMBOL(sas_rphy_free);
1653
1654 /**
1655  * sas_rphy_delete  -  remove and free SAS remote PHY
1656  * @rphy:       SAS remote PHY to remove and free
1657  *
1658  * Removes the specified SAS remote PHY and frees it.
1659  */
1660 void
1661 sas_rphy_delete(struct sas_rphy *rphy)
1662 {
1663         sas_rphy_remove(rphy);
1664         sas_rphy_free(rphy);
1665 }
1666 EXPORT_SYMBOL(sas_rphy_delete);
1667
1668 /**
1669  * sas_rphy_unlink  -  unlink SAS remote PHY
1670  * @rphy:       SAS remote phy to unlink from its parent port
1671  *
1672  * Removes port reference to an rphy
1673  */
1674 void sas_rphy_unlink(struct sas_rphy *rphy)
1675 {
1676         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1677
1678         parent->rphy = NULL;
1679 }
1680 EXPORT_SYMBOL(sas_rphy_unlink);
1681
1682 /**
1683  * sas_rphy_remove  -  remove SAS remote PHY
1684  * @rphy:       SAS remote phy to remove
1685  *
1686  * Removes the specified SAS remote PHY.
1687  */
1688 void
1689 sas_rphy_remove(struct sas_rphy *rphy)
1690 {
1691         struct device *dev = &rphy->dev;
1692
1693         switch (rphy->identify.device_type) {
1694         case SAS_END_DEVICE:
1695                 scsi_remove_target(dev);
1696                 break;
1697         case SAS_EDGE_EXPANDER_DEVICE:
1698         case SAS_FANOUT_EXPANDER_DEVICE:
1699                 sas_remove_children(dev);
1700                 break;
1701         default:
1702                 break;
1703         }
1704
1705         sas_rphy_unlink(rphy);
1706         sas_bsg_remove(NULL, rphy);
1707         transport_remove_device(dev);
1708         device_del(dev);
1709 }
1710 EXPORT_SYMBOL(sas_rphy_remove);
1711
1712 /**
1713  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1714  * @dev:        device to check
1715  *
1716  * Returns:
1717  *      %1 if the device represents a SAS remote PHY, %0 else
1718  */
1719 int scsi_is_sas_rphy(const struct device *dev)
1720 {
1721         return dev->release == sas_end_device_release ||
1722                 dev->release == sas_expander_release;
1723 }
1724 EXPORT_SYMBOL(scsi_is_sas_rphy);
1725
1726
1727 /*
1728  * SCSI scan helper
1729  */
1730
1731 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1732                 uint id, u64 lun)
1733 {
1734         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1735         struct sas_rphy *rphy;
1736
1737         mutex_lock(&sas_host->lock);
1738         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1739                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1740                     rphy->scsi_target_id == -1)
1741                         continue;
1742
1743                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1744                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1745                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1746                                          lun, SCSI_SCAN_MANUAL);
1747                 }
1748         }
1749         mutex_unlock(&sas_host->lock);
1750
1751         return 0;
1752 }
1753
1754
1755 /*
1756  * Setup / Teardown code
1757  */
1758
1759 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1760         i->private_##attrb[count] = dev_attr_##field;           \
1761         i->private_##attrb[count].attr.mode = perm;                     \
1762         i->attrb[count] = &i->private_##attrb[count];                   \
1763         if (test)                                                       \
1764                 count++
1765
1766 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1767         i->private_##attrb[count] = dev_attr_##field;           \
1768         i->private_##attrb[count].attr.mode = perm;                     \
1769         if (ro_test) {                                                  \
1770                 i->private_##attrb[count].attr.mode = ro_perm;          \
1771                 i->private_##attrb[count].store = NULL;                 \
1772         }                                                               \
1773         i->attrb[count] = &i->private_##attrb[count];                   \
1774         if (test)                                                       \
1775                 count++
1776
1777 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1778         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1779
1780 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1781         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1782
1783 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1784         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1785
1786 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1787         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1788                         !i->f->set_phy_speed, S_IRUGO)
1789
1790 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1791         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1792                           !i->f->func, S_IRUGO)
1793
1794 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1795         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1796
1797 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1798         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1799
1800 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1801         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1802
1803 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1804         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1805
1806 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1807         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1808
1809 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1810         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1811
1812 /**
1813  * sas_attach_transport  -  instantiate SAS transport template
1814  * @ft:         SAS transport class function template
1815  */
1816 struct scsi_transport_template *
1817 sas_attach_transport(struct sas_function_template *ft)
1818 {
1819         struct sas_internal *i;
1820         int count;
1821
1822         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1823         if (!i)
1824                 return NULL;
1825
1826         i->t.user_scan = sas_user_scan;
1827
1828         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1829         i->t.host_attrs.ac.class = &sas_host_class.class;
1830         i->t.host_attrs.ac.match = sas_host_match;
1831         transport_container_register(&i->t.host_attrs);
1832         i->t.host_size = sizeof(struct sas_host_attrs);
1833
1834         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1835         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1836         i->phy_attr_cont.ac.match = sas_phy_match;
1837         transport_container_register(&i->phy_attr_cont);
1838
1839         i->port_attr_cont.ac.class = &sas_port_class.class;
1840         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1841         i->port_attr_cont.ac.match = sas_port_match;
1842         transport_container_register(&i->port_attr_cont);
1843
1844         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1845         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1846         i->rphy_attr_cont.ac.match = sas_rphy_match;
1847         transport_container_register(&i->rphy_attr_cont);
1848
1849         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1850         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1851         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1852         transport_container_register(&i->end_dev_attr_cont);
1853
1854         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1855         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1856         i->expander_attr_cont.ac.match = sas_expander_match;
1857         transport_container_register(&i->expander_attr_cont);
1858
1859         i->f = ft;
1860
1861         count = 0;
1862         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1863         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1864         SETUP_PHY_ATTRIBUTE(device_type);
1865         SETUP_PHY_ATTRIBUTE(sas_address);
1866         SETUP_PHY_ATTRIBUTE(phy_identifier);
1867         //SETUP_PHY_ATTRIBUTE(port_identifier);
1868         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1869         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1870         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1871         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1872         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1873
1874         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1875         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1876         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1877         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1878         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1879         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1880         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1881         i->phy_attrs[count] = NULL;
1882
1883         count = 0;
1884         SETUP_PORT_ATTRIBUTE(num_phys);
1885         i->port_attrs[count] = NULL;
1886
1887         count = 0;
1888         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1889         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1890         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1891         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1892         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1893         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1894         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1895                                        get_enclosure_identifier);
1896         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1897                                        get_bay_identifier);
1898         i->rphy_attrs[count] = NULL;
1899
1900         count = 0;
1901         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1902         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1903         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1904         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1905         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1906         i->end_dev_attrs[count] = NULL;
1907
1908         count = 0;
1909         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1910         SETUP_EXPANDER_ATTRIBUTE(product_id);
1911         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1912         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1913         SETUP_EXPANDER_ATTRIBUTE(component_id);
1914         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1915         SETUP_EXPANDER_ATTRIBUTE(level);
1916         i->expander_attrs[count] = NULL;
1917
1918         return &i->t;
1919 }
1920 EXPORT_SYMBOL(sas_attach_transport);
1921
1922 /**
1923  * sas_release_transport  -  release SAS transport template instance
1924  * @t:          transport template instance
1925  */
1926 void sas_release_transport(struct scsi_transport_template *t)
1927 {
1928         struct sas_internal *i = to_sas_internal(t);
1929
1930         transport_container_unregister(&i->t.host_attrs);
1931         transport_container_unregister(&i->phy_attr_cont);
1932         transport_container_unregister(&i->port_attr_cont);
1933         transport_container_unregister(&i->rphy_attr_cont);
1934         transport_container_unregister(&i->end_dev_attr_cont);
1935         transport_container_unregister(&i->expander_attr_cont);
1936
1937         kfree(i);
1938 }
1939 EXPORT_SYMBOL(sas_release_transport);
1940
1941 static __init int sas_transport_init(void)
1942 {
1943         int error;
1944
1945         error = transport_class_register(&sas_host_class);
1946         if (error)
1947                 goto out;
1948         error = transport_class_register(&sas_phy_class);
1949         if (error)
1950                 goto out_unregister_transport;
1951         error = transport_class_register(&sas_port_class);
1952         if (error)
1953                 goto out_unregister_phy;
1954         error = transport_class_register(&sas_rphy_class);
1955         if (error)
1956                 goto out_unregister_port;
1957         error = transport_class_register(&sas_end_dev_class);
1958         if (error)
1959                 goto out_unregister_rphy;
1960         error = transport_class_register(&sas_expander_class);
1961         if (error)
1962                 goto out_unregister_end_dev;
1963
1964         return 0;
1965
1966  out_unregister_end_dev:
1967         transport_class_unregister(&sas_end_dev_class);
1968  out_unregister_rphy:
1969         transport_class_unregister(&sas_rphy_class);
1970  out_unregister_port:
1971         transport_class_unregister(&sas_port_class);
1972  out_unregister_phy:
1973         transport_class_unregister(&sas_phy_class);
1974  out_unregister_transport:
1975         transport_class_unregister(&sas_host_class);
1976  out:
1977         return error;
1978
1979 }
1980
1981 static void __exit sas_transport_exit(void)
1982 {
1983         transport_class_unregister(&sas_host_class);
1984         transport_class_unregister(&sas_phy_class);
1985         transport_class_unregister(&sas_port_class);
1986         transport_class_unregister(&sas_rphy_class);
1987         transport_class_unregister(&sas_end_dev_class);
1988         transport_class_unregister(&sas_expander_class);
1989 }
1990
1991 MODULE_AUTHOR("Christoph Hellwig");
1992 MODULE_DESCRIPTION("SAS Transport Attributes");
1993 MODULE_LICENSE("GPL");
1994
1995 module_init(sas_transport_init);
1996 module_exit(sas_transport_exit);