drivers/scsi/scsi_transport_sas.c

   1 /*
   2  * Copyright (C) 2005-2006 Dell Inc.
   3  *      Released under GPL v2.
   4  *
   5  * Serial Attached SCSI (SAS) transport class.
   6  *
   7  * The SAS transport class contains common code to deal with SAS HBAs,
   8  * an aproximated representation of SAS topologies in the driver model,
   9  * and various sysfs attributes to expose these topologies and management
  10  * interfaces to userspace.
  11  *
  12  * In addition to the basic SCSI core objects this transport class
  13  * introduces two additional intermediate objects:  The SAS PHY
  14  * as represented by struct sas_phy defines an "outgoing" PHY on
  15  * a SAS HBA or Expander, and the SAS remote PHY represented by
  16  * struct sas_rphy defines an "incoming" PHY on a SAS Expander or
  17  * end device.  Note that this is purely a software concept, the
  18  * underlying hardware for a PHY and a remote PHY is the exactly
  19  * the same.
  20  *
  21  * There is no concept of a SAS port in this code, users can see
  22  * what PHYs form a wide port based on the port_identifier attribute,
  23  * which is the same for all PHYs in a port.
  24  */
  25
  26 #include <linux/init.h>
  27 #include <linux/module.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/err.h>
  30 #include <linux/slab.h>
  31 #include <linux/string.h>
  32 #include <linux/blkdev.h>
  33 #include <linux/bsg.h>
  34
  35 #include <scsi/scsi.h>
  36 #include <scsi/scsi_device.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_transport.h>
  39 #include <scsi/scsi_transport_sas.h>
  40
  41 #include "scsi_sas_internal.h"
  42 struct sas_host_attrs {
  43         struct list_head rphy_list;
  44         struct mutex lock;
  45         struct request_queue *q;
  46         u32 next_target_id;
  47         u32 next_expander_id;
  48         int next_port_id;
  49 };
  50 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
  51
  52
  53 /*
  54  * Hack to allow attributes of the same name in different objects.
  55  */
  56 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  57         struct device_attribute dev_attr_##_prefix##_##_name = \
  58         __ATTR(_name,_mode,_show,_store)
  59
  60
  61 /*
  62  * Pretty printing helpers
  63  */
  64
  65 #define sas_bitfield_name_match(title, table)                   \
  66 static ssize_t                                                  \
  67 get_sas_##title##_names(u32 table_key, char *buf)               \
  68 {                                                               \
  69         char *prefix = "";                                      \
  70         ssize_t len = 0;                                        \
  71         int i;                                                  \
  72                                                                 \
  73         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  74                 if (table[i].value & table_key) {               \
  75                         len += sprintf(buf + len, "%s%s",       \
  76                                 prefix, table[i].name);         \
  77                         prefix = ", ";                          \
  78                 }                                               \
  79         }                                                       \
  80         len += sprintf(buf + len, "\n");                        \
  81         return len;                                             \
  82 }
  83
  84 #define sas_bitfield_name_set(title, table)                     \
  85 static ssize_t                                                  \
  86 set_sas_##title##_names(u32 *table_key, const char *buf)        \
  87 {                                                               \
  88         ssize_t len = 0;                                        \
  89         int i;                                                  \
  90                                                                 \
  91         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  92                 len = strlen(table[i].name);                    \
  93                 if (strncmp(buf, table[i].name, len) == 0 &&    \
  94                     (buf[len] == '\n' || buf[len] == '\0')) {   \
  95                         *table_key = table[i].value;            \
  96                         return 0;                               \
  97                 }                                               \
  98         }                                                       \
  99         return -EINVAL;                                         \
 100 }
 101
 102 #define sas_bitfield_name_search(title, table)                  \
 103 static ssize_t                                                  \
 104 get_sas_##title##_names(u32 table_key, char *buf)               \
 105 {                                                               \
 106         ssize_t len = 0;                                        \
 107         int i;                                                  \
 108                                                                 \
 109         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 110                 if (table[i].value == table_key) {              \
 111                         len += sprintf(buf + len, "%s",         \
 112                                 table[i].name);                 \
 113                         break;                                  \
 114                 }                                               \
 115         }                                                       \
 116         len += sprintf(buf + len, "\n");                        \
 117         return len;                                             \
 118 }
 119
 120 static struct {
 121         u32             value;
 122         char            *name;
 123 } sas_device_type_names[] = {
 124         { SAS_PHY_UNUSED,               "unused" },
 125         { SAS_END_DEVICE,               "end device" },
 126         { SAS_EDGE_EXPANDER_DEVICE,     "edge expander" },
 127         { SAS_FANOUT_EXPANDER_DEVICE,   "fanout expander" },
 128 };
 129 sas_bitfield_name_search(device_type, sas_device_type_names)
 130
 131
 132 static struct {
 133         u32             value;
 134         char            *name;
 135 } sas_protocol_names[] = {
 136         { SAS_PROTOCOL_SATA,            "sata" },
 137         { SAS_PROTOCOL_SMP,             "smp" },
 138         { SAS_PROTOCOL_STP,             "stp" },
 139         { SAS_PROTOCOL_SSP,             "ssp" },
 140 };
 141 sas_bitfield_name_match(protocol, sas_protocol_names)
 142
 143 static struct {
 144         u32             value;
 145         char            *name;
 146 } sas_linkspeed_names[] = {
 147         { SAS_LINK_RATE_UNKNOWN,        "Unknown" },
 148         { SAS_PHY_DISABLED,             "Phy disabled" },
 149         { SAS_LINK_RATE_FAILED,         "Link Rate failed" },
 150         { SAS_SATA_SPINUP_HOLD,         "Spin-up hold" },
 151         { SAS_LINK_RATE_1_5_GBPS,       "1.5 Gbit" },
 152         { SAS_LINK_RATE_3_0_GBPS,       "3.0 Gbit" },
 153         { SAS_LINK_RATE_6_0_GBPS,       "6.0 Gbit" },
 154         { SAS_LINK_RATE_12_0_GBPS,      "12.0 Gbit" },
 155 };
 156 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 157 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 158
 159 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 160 {
 161         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 162         struct sas_end_device *rdev;
 163
 164         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 165
 166         rdev = rphy_to_end_device(rphy);
 167         return rdev;
 168 }
 169
 170 static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
 171                             struct sas_rphy *rphy)
 172 {
 173         struct request *req;
 174         int ret;
 175         int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 176
 177         while ((req = blk_fetch_request(q)) != NULL) {
 178                 spin_unlock_irq(q->queue_lock);
 179
 180                 handler = to_sas_internal(shost->transportt)->f->smp_handler;
 181                 ret = handler(shost, rphy, req);
 182                 req->errors = ret;
 183
 184                 blk_end_request_all(req, ret);
 185
 186                 spin_lock_irq(q->queue_lock);
 187         }
 188 }
 189
 190 static void sas_host_smp_request(struct request_queue *q)
 191 {
 192         sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
 193 }
 194
 195 static void sas_non_host_smp_request(struct request_queue *q)
 196 {
 197         struct sas_rphy *rphy = q->queuedata;
 198         sas_smp_request(q, rphy_to_shost(rphy), rphy);
 199 }
 200
 201 static void sas_host_release(struct device *dev)
 202 {
 203         struct Scsi_Host *shost = dev_to_shost(dev);
 204         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 205         struct request_queue *q = sas_host->q;
 206
 207         if (q)
 208                 blk_cleanup_queue(q);
 209 }
 210
 211 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 212 {
 213         struct request_queue *q;
 214         int error;
 215         struct device *dev;
 216         char namebuf[20];
 217         const char *name;
 218         void (*release)(struct device *);
 219
 220         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 221                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 222                 return 0;
 223         }
 224
 225         if (rphy) {
 226                 q = blk_init_queue(sas_non_host_smp_request, NULL);
 227                 dev = &rphy->dev;
 228                 name = dev_name(dev);
 229                 release = NULL;
 230         } else {
 231                 q = blk_init_queue(sas_host_smp_request, NULL);
 232                 dev = &shost->shost_gendev;
 233                 snprintf(namebuf, sizeof(namebuf),
 234                          "sas_host%d", shost->host_no);
 235                 name = namebuf;
 236                 release = sas_host_release;
 237         }
 238         if (!q)
 239                 return -ENOMEM;
 240
 241         error = bsg_register_queue(q, dev, name, release);
 242         if (error) {
 243                 blk_cleanup_queue(q);
 244                 return -ENOMEM;
 245         }
 246
 247         if (rphy)
 248                 rphy->q = q;
 249         else
 250                 to_sas_host_attrs(shost)->q = q;
 251
 252         if (rphy)
 253                 q->queuedata = rphy;
 254         else
 255                 q->queuedata = shost;
 256
 257         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
 258         return 0;
 259 }
 260
 261 static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
 262 {
 263         struct request_queue *q;
 264
 265         if (rphy)
 266                 q = rphy->q;
 267         else
 268                 q = to_sas_host_attrs(shost)->q;
 269
 270         if (!q)
 271                 return;
 272
 273         bsg_unregister_queue(q);
 274 }
 275
 276 /*
 277  * SAS host attributes
 278  */
 279
 280 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 281                           struct device *cdev)
 282 {
 283         struct Scsi_Host *shost = dev_to_shost(dev);
 284         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 285
 286         INIT_LIST_HEAD(&sas_host->rphy_list);
 287         mutex_init(&sas_host->lock);
 288         sas_host->next_target_id = 0;
 289         sas_host->next_expander_id = 0;
 290         sas_host->next_port_id = 0;
 291
 292         if (sas_bsg_initialize(shost, NULL))
 293                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 294                            shost->host_no);
 295
 296         return 0;
 297 }
 298
 299 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 300                            struct device *cdev)
 301 {
 302         struct Scsi_Host *shost = dev_to_shost(dev);
 303
 304         sas_bsg_remove(shost, NULL);
 305
 306         return 0;
 307 }
 308
 309 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 310                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 311
 312 static int sas_host_match(struct attribute_container *cont,
 313                             struct device *dev)
 314 {
 315         struct Scsi_Host *shost;
 316         struct sas_internal *i;
 317
 318         if (!scsi_is_host_device(dev))
 319                 return 0;
 320         shost = dev_to_shost(dev);
 321
 322         if (!shost->transportt)
 323                 return 0;
 324         if (shost->transportt->host_attrs.ac.class !=
 325                         &sas_host_class.class)
 326                 return 0;
 327
 328         i = to_sas_internal(shost->transportt);
 329         return &i->t.host_attrs.ac == cont;
 330 }
 331
 332 static int do_sas_phy_delete(struct device *dev, void *data)
 333 {
 334         int pass = (int)(unsigned long)data;
 335
 336         if (pass == 0 && scsi_is_sas_port(dev))
 337                 sas_port_delete(dev_to_sas_port(dev));
 338         else if (pass == 1 && scsi_is_sas_phy(dev))
 339                 sas_phy_delete(dev_to_phy(dev));
 340         return 0;
 341 }
 342
 343 /**
 344  * is_sas_attached - check if device is SAS attached
 345  * @sdev: scsi device to check
 346  *
 347  * returns true if the device is SAS attached
 348  */
 349 int is_sas_attached(struct scsi_device *sdev)
 350 {
 351         struct Scsi_Host *shost = sdev->host;
 352
 353         return shost->transportt->host_attrs.ac.class ==
 354                 &sas_host_class.class;
 355 }
 356 EXPORT_SYMBOL(is_sas_attached);
 357
 358
 359 /**
 360  * sas_remove_children  -  tear down a devices SAS data structures
 361  * @dev:        device belonging to the sas object
 362  *
 363  * Removes all SAS PHYs and remote PHYs for a given object
 364  */
 365 void sas_remove_children(struct device *dev)
 366 {
 367         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 368         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 369 }
 370 EXPORT_SYMBOL(sas_remove_children);
 371
 372 /**
 373  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 374  * @shost:      Scsi Host that is torn down
 375  *
 376  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
 377  * Must be called just before scsi_remove_host for SAS HBAs.
 378  */
 379 void sas_remove_host(struct Scsi_Host *shost)
 380 {
 381         sas_remove_children(&shost->shost_gendev);
 382 }
 383 EXPORT_SYMBOL(sas_remove_host);
 384
 385 /**
 386  * sas_get_address - return the SAS address of the device
 387  * @sdev: scsi device
 388  *
 389  * Returns the SAS address of the scsi device
 390  */
 391 u64 sas_get_address(struct scsi_device *sdev)
 392 {
 393         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 394
 395         return rdev->rphy.identify.sas_address;
 396 }
 397 EXPORT_SYMBOL(sas_get_address);
 398
 399 /**
 400  * sas_tlr_supported - checking TLR bit in vpd 0x90
 401  * @sdev: scsi device struct
 402  *
 403  * Check Transport Layer Retries are supported or not.
 404  * If vpd page 0x90 is present, TRL is supported.
 405  *
 406  */
 407 unsigned int
 408 sas_tlr_supported(struct scsi_device *sdev)
 409 {
 410         const int vpd_len = 32;
 411         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 412         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 413         int ret = 0;
 414
 415         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 416                 goto out;
 417
 418         /*
 419          * Magic numbers: the VPD Protocol page (0x90)
 420          * has a 4 byte header and then one entry per device port
 421          * the TLR bit is at offset 8 on each port entry
 422          * if we take the first port, that's at total offset 12
 423          */
 424         ret = buffer[12] & 0x01;
 425
 426  out:
 427         kfree(buffer);
 428         rdev->tlr_supported = ret;
 429         return ret;
 430
 431 }
 432 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 433
 434 /**
 435  * sas_disable_tlr - setting TLR flags
 436  * @sdev: scsi device struct
 437  *
 438  * Seting tlr_enabled flag to 0.
 439  *
 440  */
 441 void
 442 sas_disable_tlr(struct scsi_device *sdev)
 443 {
 444         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 445
 446         rdev->tlr_enabled = 0;
 447 }
 448 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 449
 450 /**
 451  * sas_enable_tlr - setting TLR flags
 452  * @sdev: scsi device struct
 453  *
 454  * Seting tlr_enabled flag 1.
 455  *
 456  */
 457 void sas_enable_tlr(struct scsi_device *sdev)
 458 {
 459         unsigned int tlr_supported = 0;
 460         tlr_supported  = sas_tlr_supported(sdev);
 461
 462         if (tlr_supported) {
 463                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 464
 465                 rdev->tlr_enabled = 1;
 466         }
 467
 468         return;
 469 }
 470 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 471
 472 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 473 {
 474         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 475         return rdev->tlr_enabled;
 476 }
 477 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 478
 479 /*
 480  * SAS Phy attributes
 481  */
 482
 483 #define sas_phy_show_simple(field, name, format_string, cast)           \
 484 static ssize_t                                                          \
 485 show_sas_phy_##name(struct device *dev,                                 \
 486                     struct device_attribute *attr, char *buf)           \
 487 {                                                                       \
 488         struct sas_phy *phy = transport_class_to_phy(dev);              \
 489                                                                         \
 490         return snprintf(buf, 20, format_string, cast phy->field);       \
 491 }
 492
 493 #define sas_phy_simple_attr(field, name, format_string, type)           \
 494         sas_phy_show_simple(field, name, format_string, (type)) \
 495 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 496
 497 #define sas_phy_show_protocol(field, name)                              \
 498 static ssize_t                                                          \
 499 show_sas_phy_##name(struct device *dev,                                 \
 500                     struct device_attribute *attr, char *buf)           \
 501 {                                                                       \
 502         struct sas_phy *phy = transport_class_to_phy(dev);              \
 503                                                                         \
 504         if (!phy->field)                                                \
 505                 return snprintf(buf, 20, "none\n");                     \
 506         return get_sas_protocol_names(phy->field, buf);         \
 507 }
 508
 509 #define sas_phy_protocol_attr(field, name)                              \
 510         sas_phy_show_protocol(field, name)                              \
 511 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 512
 513 #define sas_phy_show_linkspeed(field)                                   \
 514 static ssize_t                                                          \
 515 show_sas_phy_##field(struct device *dev,                                \
 516                      struct device_attribute *attr, char *buf)          \
 517 {                                                                       \
 518         struct sas_phy *phy = transport_class_to_phy(dev);              \
 519                                                                         \
 520         return get_sas_linkspeed_names(phy->field, buf);                \
 521 }
 522
 523 /* Fudge to tell if we're minimum or maximum */
 524 #define sas_phy_store_linkspeed(field)                                  \
 525 static ssize_t                                                          \
 526 store_sas_phy_##field(struct device *dev,                               \
 527                       struct device_attribute *attr,                    \
 528                       const char *buf,  size_t count)                   \
 529 {                                                                       \
 530         struct sas_phy *phy = transport_class_to_phy(dev);              \
 531         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 532         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 533         u32 value;                                                      \
 534         struct sas_phy_linkrates rates = {0};                           \
 535         int error;                                                      \
 536                                                                         \
 537         error = set_sas_linkspeed_names(&value, buf);                   \
 538         if (error)                                                      \
 539                 return error;                                           \
 540         rates.field = value;                                            \
 541         error = i->f->set_phy_speed(phy, &rates);                       \
 542                                                                         \
 543         return error ? error : count;                                   \
 544 }
 545
 546 #define sas_phy_linkspeed_rw_attr(field)                                \
 547         sas_phy_show_linkspeed(field)                                   \
 548         sas_phy_store_linkspeed(field)                                  \
 549 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 550         store_sas_phy_##field)
 551
 552 #define sas_phy_linkspeed_attr(field)                                   \
 553         sas_phy_show_linkspeed(field)                                   \
 554 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 555
 556
 557 #define sas_phy_show_linkerror(field)                                   \
 558 static ssize_t                                                          \
 559 show_sas_phy_##field(struct device *dev,                                \
 560                      struct device_attribute *attr, char *buf)          \
 561 {                                                                       \
 562         struct sas_phy *phy = transport_class_to_phy(dev);              \
 563         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 564         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 565         int error;                                                      \
 566                                                                         \
 567         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 568         if (error)                                                      \
 569                 return error;                                           \
 570         return snprintf(buf, 20, "%u\n", phy->field);                   \
 571 }
 572
 573 #define sas_phy_linkerror_attr(field)                                   \
 574         sas_phy_show_linkerror(field)                                   \
 575 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 576
 577
 578 static ssize_t
 579 show_sas_device_type(struct device *dev,
 580                      struct device_attribute *attr, char *buf)
 581 {
 582         struct sas_phy *phy = transport_class_to_phy(dev);
 583
 584         if (!phy->identify.device_type)
 585                 return snprintf(buf, 20, "none\n");
 586         return get_sas_device_type_names(phy->identify.device_type, buf);
 587 }
 588 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 589
 590 static ssize_t do_sas_phy_enable(struct device *dev,
 591                 size_t count, int enable)
 592 {
 593         struct sas_phy *phy = transport_class_to_phy(dev);
 594         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 595         struct sas_internal *i = to_sas_internal(shost->transportt);
 596         int error;
 597
 598         error = i->f->phy_enable(phy, enable);
 599         if (error)
 600                 return error;
 601         phy->enabled = enable;
 602         return count;
 603 };
 604
 605 static ssize_t
 606 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 607                      const char *buf, size_t count)
 608 {
 609         if (count < 1)
 610                 return -EINVAL;
 611
 612         switch (buf[0]) {
 613         case '0':
 614                 do_sas_phy_enable(dev, count, 0);
 615                 break;
 616         case '1':
 617                 do_sas_phy_enable(dev, count, 1);
 618                 break;
 619         default:
 620                 return -EINVAL;
 621         }
 622
 623         return count;
 624 }
 625
 626 static ssize_t
 627 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 628                     char *buf)
 629 {
 630         struct sas_phy *phy = transport_class_to_phy(dev);
 631
 632         return snprintf(buf, 20, "%d", phy->enabled);
 633 }
 634
 635 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 636                          store_sas_phy_enable);
 637
 638 static ssize_t
 639 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 640 {
 641         struct sas_phy *phy = transport_class_to_phy(dev);
 642         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 643         struct sas_internal *i = to_sas_internal(shost->transportt);
 644         int error;
 645
 646         error = i->f->phy_reset(phy, hard_reset);
 647         if (error)
 648                 return error;
 649         phy->enabled = 1;
 650         return count;
 651 };
 652
 653 static ssize_t
 654 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 655                      const char *buf, size_t count)
 656 {
 657         return do_sas_phy_reset(dev, count, 0);
 658 }
 659 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 660
 661 static ssize_t
 662 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 663                      const char *buf, size_t count)
 664 {
 665         return do_sas_phy_reset(dev, count, 1);
 666 }
 667 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 668
 669 sas_phy_protocol_attr(identify.initiator_port_protocols,
 670                 initiator_port_protocols);
 671 sas_phy_protocol_attr(identify.target_port_protocols,
 672                 target_port_protocols);
 673 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 674                 unsigned long long);
 675 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 676 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 677 sas_phy_linkspeed_attr(negotiated_linkrate);
 678 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 679 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 680 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 681 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 682 sas_phy_linkerror_attr(invalid_dword_count);
 683 sas_phy_linkerror_attr(running_disparity_error_count);
 684 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 685 sas_phy_linkerror_attr(phy_reset_problem_count);
 686
 687 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 688                          struct device *cdev)
 689 {
 690         struct sas_phy *phy = dev_to_phy(dev);
 691         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 692         struct sas_internal *i = to_sas_internal(shost->transportt);
 693
 694         if (i->f->phy_setup)
 695                 i->f->phy_setup(phy);
 696
 697         return 0;
 698 }
 699
 700 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 701                 "sas_phy", sas_phy_setup, NULL, NULL);
 702
 703 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 704 {
 705         struct Scsi_Host *shost;
 706         struct sas_internal *i;
 707
 708         if (!scsi_is_sas_phy(dev))
 709                 return 0;
 710         shost = dev_to_shost(dev->parent);
 711
 712         if (!shost->transportt)
 713                 return 0;
 714         if (shost->transportt->host_attrs.ac.class !=
 715                         &sas_host_class.class)
 716                 return 0;
 717
 718         i = to_sas_internal(shost->transportt);
 719         return &i->phy_attr_cont.ac == cont;
 720 }
 721
 722 static void sas_phy_release(struct device *dev)
 723 {
 724         struct sas_phy *phy = dev_to_phy(dev);
 725         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 726         struct sas_internal *i = to_sas_internal(shost->transportt);
 727
 728         if (i->f->phy_release)
 729                 i->f->phy_release(phy);
 730         put_device(dev->parent);
 731         kfree(phy);
 732 }
 733
 734 /**
 735  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 736  * @parent:     Parent device
 737  * @number:     Phy index
 738  *
 739  * Allocates an SAS PHY structure.  It will be added in the device tree
 740  * below the device specified by @parent, which has to be either a Scsi_Host
 741  * or sas_rphy.
 742  *
 743  * Returns:
 744  *      SAS PHY allocated or %NULL if the allocation failed.
 745  */
 746 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 747 {
 748         struct Scsi_Host *shost = dev_to_shost(parent);
 749         struct sas_phy *phy;
 750
 751         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 752         if (!phy)
 753                 return NULL;
 754
 755         phy->number = number;
 756         phy->enabled = 1;
 757
 758         device_initialize(&phy->dev);
 759         phy->dev.parent = get_device(parent);
 760         phy->dev.release = sas_phy_release;
 761         INIT_LIST_HEAD(&phy->port_siblings);
 762         if (scsi_is_sas_expander_device(parent)) {
 763                 struct sas_rphy *rphy = dev_to_rphy(parent);
 764                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 765                         rphy->scsi_target_id, number);
 766         } else
 767                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 768
 769         transport_setup_device(&phy->dev);
 770
 771         return phy;
 772 }
 773 EXPORT_SYMBOL(sas_phy_alloc);
 774
 775 /**
 776  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 777  * @phy:        The PHY to be added
 778  *
 779  * Publishes a SAS PHY to the rest of the system.
 780  */
 781 int sas_phy_add(struct sas_phy *phy)
 782 {
 783         int error;
 784
 785         error = device_add(&phy->dev);
 786         if (!error) {
 787                 transport_add_device(&phy->dev);
 788                 transport_configure_device(&phy->dev);
 789         }
 790
 791         return error;
 792 }
 793 EXPORT_SYMBOL(sas_phy_add);
 794
 795 /**
 796  * sas_phy_free  -  free a SAS PHY
 797  * @phy:        SAS PHY to free
 798  *
 799  * Frees the specified SAS PHY.
 800  *
 801  * Note:
 802  *   This function must only be called on a PHY that has not
 803  *   successfully been added using sas_phy_add().
 804  */
 805 void sas_phy_free(struct sas_phy *phy)
 806 {
 807         transport_destroy_device(&phy->dev);
 808         put_device(&phy->dev);
 809 }
 810 EXPORT_SYMBOL(sas_phy_free);
 811
 812 /**
 813  * sas_phy_delete  -  remove SAS PHY
 814  * @phy:        SAS PHY to remove
 815  *
 816  * Removes the specified SAS PHY.  If the SAS PHY has an
 817  * associated remote PHY it is removed before.
 818  */
 819 void
 820 sas_phy_delete(struct sas_phy *phy)
 821 {
 822         struct device *dev = &phy->dev;
 823
 824         /* this happens if the phy is still part of a port when deleted */
 825         BUG_ON(!list_empty(&phy->port_siblings));
 826
 827         transport_remove_device(dev);
 828         device_del(dev);
 829         transport_destroy_device(dev);
 830         put_device(dev);
 831 }
 832 EXPORT_SYMBOL(sas_phy_delete);
 833
 834 /**
 835  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 836  * @dev:        device to check
 837  *
 838  * Returns:
 839  *      %1 if the device represents a SAS PHY, %0 else
 840  */
 841 int scsi_is_sas_phy(const struct device *dev)
 842 {
 843         return dev->release == sas_phy_release;
 844 }
 845 EXPORT_SYMBOL(scsi_is_sas_phy);
 846
 847 /*
 848  * SAS Port attributes
 849  */
 850 #define sas_port_show_simple(field, name, format_string, cast)          \
 851 static ssize_t                                                          \
 852 show_sas_port_##name(struct device *dev,                                \
 853                      struct device_attribute *attr, char *buf)          \
 854 {                                                                       \
 855         struct sas_port *port = transport_class_to_sas_port(dev);       \
 856                                                                         \
 857         return snprintf(buf, 20, format_string, cast port->field);      \
 858 }
 859
 860 #define sas_port_simple_attr(field, name, format_string, type)          \
 861         sas_port_show_simple(field, name, format_string, (type))        \
 862 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 863
 864 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 865
 866 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 867                                "sas_port", NULL, NULL, NULL);
 868
 869 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 870 {
 871         struct Scsi_Host *shost;
 872         struct sas_internal *i;
 873
 874         if (!scsi_is_sas_port(dev))
 875                 return 0;
 876         shost = dev_to_shost(dev->parent);
 877
 878         if (!shost->transportt)
 879                 return 0;
 880         if (shost->transportt->host_attrs.ac.class !=
 881                         &sas_host_class.class)
 882                 return 0;
 883
 884         i = to_sas_internal(shost->transportt);
 885         return &i->port_attr_cont.ac == cont;
 886 }
 887
 888
 889 static void sas_port_release(struct device *dev)
 890 {
 891         struct sas_port *port = dev_to_sas_port(dev);
 892
 893         BUG_ON(!list_empty(&port->phy_list));
 894
 895         put_device(dev->parent);
 896         kfree(port);
 897 }
 898
 899 static void sas_port_create_link(struct sas_port *port,
 900                                  struct sas_phy *phy)
 901 {
 902         int res;
 903
 904         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 905                                 dev_name(&phy->dev));
 906         if (res)
 907                 goto err;
 908         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 909         if (res)
 910                 goto err;
 911         return;
 912 err:
 913         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 914                __func__, res);
 915 }
 916
 917 static void sas_port_delete_link(struct sas_port *port,
 918                                  struct sas_phy *phy)
 919 {
 920         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 921         sysfs_remove_link(&phy->dev.kobj, "port");
 922 }
 923
 924 /** sas_port_alloc - allocate and initialize a SAS port structure
 925  *
 926  * @parent:     parent device
 927  * @port_id:    port number
 928  *
 929  * Allocates a SAS port structure.  It will be added to the device tree
 930  * below the device specified by @parent which must be either a Scsi_Host
 931  * or a sas_expander_device.
 932  *
 933  * Returns %NULL on error
 934  */
 935 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 936 {
 937         struct Scsi_Host *shost = dev_to_shost(parent);
 938         struct sas_port *port;
 939
 940         port = kzalloc(sizeof(*port), GFP_KERNEL);
 941         if (!port)
 942                 return NULL;
 943
 944         port->port_identifier = port_id;
 945
 946         device_initialize(&port->dev);
 947
 948         port->dev.parent = get_device(parent);
 949         port->dev.release = sas_port_release;
 950
 951         mutex_init(&port->phy_list_mutex);
 952         INIT_LIST_HEAD(&port->phy_list);
 953
 954         if (scsi_is_sas_expander_device(parent)) {
 955                 struct sas_rphy *rphy = dev_to_rphy(parent);
 956                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 957                              rphy->scsi_target_id, port->port_identifier);
 958         } else
 959                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 960                              port->port_identifier);
 961
 962         transport_setup_device(&port->dev);
 963
 964         return port;
 965 }
 966 EXPORT_SYMBOL(sas_port_alloc);
 967
 968 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 969  *
 970  * @parent:     parent device
 971  *
 972  * Allocates a SAS port structure and a number to go with it.  This
 973  * interface is really for adapters where the port number has no
 974  * meansing, so the sas class should manage them.  It will be added to
 975  * the device tree below the device specified by @parent which must be
 976  * either a Scsi_Host or a sas_expander_device.
 977  *
 978  * Returns %NULL on error
 979  */
 980 struct sas_port *sas_port_alloc_num(struct device *parent)
 981 {
 982         int index;
 983         struct Scsi_Host *shost = dev_to_shost(parent);
 984         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 985
 986         /* FIXME: use idr for this eventually */
 987         mutex_lock(&sas_host->lock);
 988         if (scsi_is_sas_expander_device(parent)) {
 989                 struct sas_rphy *rphy = dev_to_rphy(parent);
 990                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 991
 992                 index = exp->next_port_id++;
 993         } else
 994                 index = sas_host->next_port_id++;
 995         mutex_unlock(&sas_host->lock);
 996         return sas_port_alloc(parent, index);
 997 }
 998 EXPORT_SYMBOL(sas_port_alloc_num);
 999
1000 /**
1001  * sas_port_add - add a SAS port to the device hierarchy
1002  * @port:       port to be added
1003  *
1004  * publishes a port to the rest of the system
1005  */
1006 int sas_port_add(struct sas_port *port)
1007 {
1008         int error;
1009
1010         /* No phys should be added until this is made visible */
1011         BUG_ON(!list_empty(&port->phy_list));
1012
1013         error = device_add(&port->dev);
1014
1015         if (error)
1016                 return error;
1017
1018         transport_add_device(&port->dev);
1019         transport_configure_device(&port->dev);
1020
1021         return 0;
1022 }
1023 EXPORT_SYMBOL(sas_port_add);
1024
1025 /**
1026  * sas_port_free  -  free a SAS PORT
1027  * @port:       SAS PORT to free
1028  *
1029  * Frees the specified SAS PORT.
1030  *
1031  * Note:
1032  *   This function must only be called on a PORT that has not
1033  *   successfully been added using sas_port_add().
1034  */
1035 void sas_port_free(struct sas_port *port)
1036 {
1037         transport_destroy_device(&port->dev);
1038         put_device(&port->dev);
1039 }
1040 EXPORT_SYMBOL(sas_port_free);
1041
1042 /**
1043  * sas_port_delete  -  remove SAS PORT
1044  * @port:       SAS PORT to remove
1045  *
1046  * Removes the specified SAS PORT.  If the SAS PORT has an
1047  * associated phys, unlink them from the port as well.
1048  */
1049 void sas_port_delete(struct sas_port *port)
1050 {
1051         struct device *dev = &port->dev;
1052         struct sas_phy *phy, *tmp_phy;
1053
1054         if (port->rphy) {
1055                 sas_rphy_delete(port->rphy);
1056                 port->rphy = NULL;
1057         }
1058
1059         mutex_lock(&port->phy_list_mutex);
1060         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1061                                  port_siblings) {
1062                 sas_port_delete_link(port, phy);
1063                 list_del_init(&phy->port_siblings);
1064         }
1065         mutex_unlock(&port->phy_list_mutex);
1066
1067         if (port->is_backlink) {
1068                 struct device *parent = port->dev.parent;
1069
1070                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1071                 port->is_backlink = 0;
1072         }
1073
1074         transport_remove_device(dev);
1075         device_del(dev);
1076         transport_destroy_device(dev);
1077         put_device(dev);
1078 }
1079 EXPORT_SYMBOL(sas_port_delete);
1080
1081 /**
1082  * scsi_is_sas_port -  check if a struct device represents a SAS port
1083  * @dev:        device to check
1084  *
1085  * Returns:
1086  *      %1 if the device represents a SAS Port, %0 else
1087  */
1088 int scsi_is_sas_port(const struct device *dev)
1089 {
1090         return dev->release == sas_port_release;
1091 }
1092 EXPORT_SYMBOL(scsi_is_sas_port);
1093
1094 /**
1095  * sas_port_get_phy - try to take a reference on a port member
1096  * @port: port to check
1097  */
1098 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1099 {
1100         struct sas_phy *phy;
1101
1102         mutex_lock(&port->phy_list_mutex);
1103         if (list_empty(&port->phy_list))
1104                 phy = NULL;
1105         else {
1106                 struct list_head *ent = port->phy_list.next;
1107
1108                 phy = list_entry(ent, typeof(*phy), port_siblings);
1109                 get_device(&phy->dev);
1110         }
1111         mutex_unlock(&port->phy_list_mutex);
1112
1113         return phy;
1114 }
1115 EXPORT_SYMBOL(sas_port_get_phy);
1116
1117 /**
1118  * sas_port_add_phy - add another phy to a port to form a wide port
1119  * @port:       port to add the phy to
1120  * @phy:        phy to add
1121  *
1122  * When a port is initially created, it is empty (has no phys).  All
1123  * ports must have at least one phy to operated, and all wide ports
1124  * must have at least two.  The current code makes no difference
1125  * between ports and wide ports, but the only object that can be
1126  * connected to a remote device is a port, so ports must be formed on
1127  * all devices with phys if they're connected to anything.
1128  */
1129 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1130 {
1131         mutex_lock(&port->phy_list_mutex);
1132         if (unlikely(!list_empty(&phy->port_siblings))) {
1133                 /* make sure we're already on this port */
1134                 struct sas_phy *tmp;
1135
1136                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1137                         if (tmp == phy)
1138                                 break;
1139                 /* If this trips, you added a phy that was already
1140                  * part of a different port */
1141                 if (unlikely(tmp != phy)) {
1142                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1143                                    dev_name(&phy->dev));
1144                         BUG();
1145                 }
1146         } else {
1147                 sas_port_create_link(port, phy);
1148                 list_add_tail(&phy->port_siblings, &port->phy_list);
1149                 port->num_phys++;
1150         }
1151         mutex_unlock(&port->phy_list_mutex);
1152 }
1153 EXPORT_SYMBOL(sas_port_add_phy);
1154
1155 /**
1156  * sas_port_delete_phy - remove a phy from a port or wide port
1157  * @port:       port to remove the phy from
1158  * @phy:        phy to remove
1159  *
1160  * This operation is used for tearing down ports again.  It must be
1161  * done to every port or wide port before calling sas_port_delete.
1162  */
1163 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1164 {
1165         mutex_lock(&port->phy_list_mutex);
1166         sas_port_delete_link(port, phy);
1167         list_del_init(&phy->port_siblings);
1168         port->num_phys--;
1169         mutex_unlock(&port->phy_list_mutex);
1170 }
1171 EXPORT_SYMBOL(sas_port_delete_phy);
1172
1173 void sas_port_mark_backlink(struct sas_port *port)
1174 {
1175         int res;
1176         struct device *parent = port->dev.parent->parent->parent;
1177
1178         if (port->is_backlink)
1179                 return;
1180         port->is_backlink = 1;
1181         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1182                                 dev_name(parent));
1183         if (res)
1184                 goto err;
1185         return;
1186 err:
1187         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1188                __func__, res);
1189
1190 }
1191 EXPORT_SYMBOL(sas_port_mark_backlink);
1192
1193 /*
1194  * SAS remote PHY attributes.
1195  */
1196
1197 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1198 static ssize_t                                                          \
1199 show_sas_rphy_##name(struct device *dev,                                \
1200                      struct device_attribute *attr, char *buf)          \
1201 {                                                                       \
1202         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1203                                                                         \
1204         return snprintf(buf, 20, format_string, cast rphy->field);      \
1205 }
1206
1207 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1208         sas_rphy_show_simple(field, name, format_string, (type))        \
1209 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1210                 show_sas_rphy_##name, NULL)
1211
1212 #define sas_rphy_show_protocol(field, name)                             \
1213 static ssize_t                                                          \
1214 show_sas_rphy_##name(struct device *dev,                                \
1215                      struct device_attribute *attr, char *buf)          \
1216 {                                                                       \
1217         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1218                                                                         \
1219         if (!rphy->field)                                       \
1220                 return snprintf(buf, 20, "none\n");                     \
1221         return get_sas_protocol_names(rphy->field, buf);        \
1222 }
1223
1224 #define sas_rphy_protocol_attr(field, name)                             \
1225         sas_rphy_show_protocol(field, name)                             \
1226 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1227                 show_sas_rphy_##name, NULL)
1228
1229 static ssize_t
1230 show_sas_rphy_device_type(struct device *dev,
1231                           struct device_attribute *attr, char *buf)
1232 {
1233         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1234
1235         if (!rphy->identify.device_type)
1236                 return snprintf(buf, 20, "none\n");
1237         return get_sas_device_type_names(
1238                         rphy->identify.device_type, buf);
1239 }
1240
1241 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1242                 show_sas_rphy_device_type, NULL);
1243
1244 static ssize_t
1245 show_sas_rphy_enclosure_identifier(struct device *dev,
1246                                    struct device_attribute *attr, char *buf)
1247 {
1248         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1249         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1250         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1251         struct sas_internal *i = to_sas_internal(shost->transportt);
1252         u64 identifier;
1253         int error;
1254
1255         error = i->f->get_enclosure_identifier(rphy, &identifier);
1256         if (error)
1257                 return error;
1258         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1259 }
1260
1261 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1262                 show_sas_rphy_enclosure_identifier, NULL);
1263
1264 static ssize_t
1265 show_sas_rphy_bay_identifier(struct device *dev,
1266                              struct device_attribute *attr, char *buf)
1267 {
1268         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1269         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1270         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1271         struct sas_internal *i = to_sas_internal(shost->transportt);
1272         int val;
1273
1274         val = i->f->get_bay_identifier(rphy);
1275         if (val < 0)
1276                 return val;
1277         return sprintf(buf, "%d\n", val);
1278 }
1279
1280 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1281                 show_sas_rphy_bay_identifier, NULL);
1282
1283 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1284                 initiator_port_protocols);
1285 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1286 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1287                 unsigned long long);
1288 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1289 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1290
1291 /* only need 8 bytes of data plus header (4 or 8) */
1292 #define BUF_SIZE 64
1293
1294 int sas_read_port_mode_page(struct scsi_device *sdev)
1295 {
1296         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1297         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1298         struct scsi_mode_data mode_data;
1299         int res, error;
1300
1301         if (!buffer)
1302                 return -ENOMEM;
1303
1304         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1305                               &mode_data, NULL);
1306
1307         error = -EINVAL;
1308         if (!scsi_status_is_good(res))
1309                 goto out;
1310
1311         msdata = buffer +  mode_data.header_length +
1312                 mode_data.block_descriptor_length;
1313
1314         if (msdata - buffer > BUF_SIZE - 8)
1315                 goto out;
1316
1317         error = 0;
1318
1319         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1320         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1321         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1322
1323  out:
1324         kfree(buffer);
1325         return error;
1326 }
1327 EXPORT_SYMBOL(sas_read_port_mode_page);
1328
1329 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1330                                "sas_end_device", NULL, NULL, NULL);
1331
1332 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1333 static ssize_t                                                          \
1334 show_sas_end_dev_##name(struct device *dev,                             \
1335                         struct device_attribute *attr, char *buf)       \
1336 {                                                                       \
1337         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1338         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1339                                                                         \
1340         return snprintf(buf, 20, format_string, cast rdev->field);      \
1341 }
1342
1343 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1344         sas_end_dev_show_simple(field, name, format_string, (type))     \
1345 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1346                 show_sas_end_dev_##name, NULL)
1347
1348 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1349 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1350                         "%d\n", int);
1351 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1352                         "%d\n", int);
1353 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1354                         "%d\n", int);
1355 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1356                         "%d\n", int);
1357
1358 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1359                                "sas_expander", NULL, NULL, NULL);
1360
1361 #define sas_expander_show_simple(field, name, format_string, cast)      \
1362 static ssize_t                                                          \
1363 show_sas_expander_##name(struct device *dev,                            \
1364                          struct device_attribute *attr, char *buf)      \
1365 {                                                                       \
1366         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1367         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1368                                                                         \
1369         return snprintf(buf, 20, format_string, cast edev->field);      \
1370 }
1371
1372 #define sas_expander_simple_attr(field, name, format_string, type)      \
1373         sas_expander_show_simple(field, name, format_string, (type))    \
1374 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1375                 show_sas_expander_##name, NULL)
1376
1377 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1378 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1379 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1380 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1381                          "%s\n", char *);
1382 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1383 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1384                          unsigned int);
1385 sas_expander_simple_attr(level, level, "%d\n", int);
1386
1387 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1388                 "sas_device", NULL, NULL, NULL);
1389
1390 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1391 {
1392         struct Scsi_Host *shost;
1393         struct sas_internal *i;
1394
1395         if (!scsi_is_sas_rphy(dev))
1396                 return 0;
1397         shost = dev_to_shost(dev->parent->parent);
1398
1399         if (!shost->transportt)
1400                 return 0;
1401         if (shost->transportt->host_attrs.ac.class !=
1402                         &sas_host_class.class)
1403                 return 0;
1404
1405         i = to_sas_internal(shost->transportt);
1406         return &i->rphy_attr_cont.ac == cont;
1407 }
1408
1409 static int sas_end_dev_match(struct attribute_container *cont,
1410                              struct device *dev)
1411 {
1412         struct Scsi_Host *shost;
1413         struct sas_internal *i;
1414         struct sas_rphy *rphy;
1415
1416         if (!scsi_is_sas_rphy(dev))
1417                 return 0;
1418         shost = dev_to_shost(dev->parent->parent);
1419         rphy = dev_to_rphy(dev);
1420
1421         if (!shost->transportt)
1422                 return 0;
1423         if (shost->transportt->host_attrs.ac.class !=
1424                         &sas_host_class.class)
1425                 return 0;
1426
1427         i = to_sas_internal(shost->transportt);
1428         return &i->end_dev_attr_cont.ac == cont &&
1429                 rphy->identify.device_type == SAS_END_DEVICE;
1430 }
1431
1432 static int sas_expander_match(struct attribute_container *cont,
1433                               struct device *dev)
1434 {
1435         struct Scsi_Host *shost;
1436         struct sas_internal *i;
1437         struct sas_rphy *rphy;
1438
1439         if (!scsi_is_sas_rphy(dev))
1440                 return 0;
1441         shost = dev_to_shost(dev->parent->parent);
1442         rphy = dev_to_rphy(dev);
1443
1444         if (!shost->transportt)
1445                 return 0;
1446         if (shost->transportt->host_attrs.ac.class !=
1447                         &sas_host_class.class)
1448                 return 0;
1449
1450         i = to_sas_internal(shost->transportt);
1451         return &i->expander_attr_cont.ac == cont &&
1452                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1453                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1454 }
1455
1456 static void sas_expander_release(struct device *dev)
1457 {
1458         struct sas_rphy *rphy = dev_to_rphy(dev);
1459         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1460
1461         if (rphy->q)
1462                 blk_cleanup_queue(rphy->q);
1463
1464         put_device(dev->parent);
1465         kfree(edev);
1466 }
1467
1468 static void sas_end_device_release(struct device *dev)
1469 {
1470         struct sas_rphy *rphy = dev_to_rphy(dev);
1471         struct sas_end_device *edev = rphy_to_end_device(rphy);
1472
1473         if (rphy->q)
1474                 blk_cleanup_queue(rphy->q);
1475
1476         put_device(dev->parent);
1477         kfree(edev);
1478 }
1479
1480 /**
1481  * sas_rphy_initialize - common rphy intialization
1482  * @rphy:       rphy to initialise
1483  *
1484  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1485  * initialise the common rphy component of each.
1486  */
1487 static void sas_rphy_initialize(struct sas_rphy *rphy)
1488 {
1489         INIT_LIST_HEAD(&rphy->list);
1490 }
1491
1492 /**
1493  * sas_end_device_alloc - allocate an rphy for an end device
1494  * @parent: which port
1495  *
1496  * Allocates an SAS remote PHY structure, connected to @parent.
1497  *
1498  * Returns:
1499  *      SAS PHY allocated or %NULL if the allocation failed.
1500  */
1501 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1502 {
1503         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1504         struct sas_end_device *rdev;
1505
1506         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1507         if (!rdev) {
1508                 return NULL;
1509         }
1510
1511         device_initialize(&rdev->rphy.dev);
1512         rdev->rphy.dev.parent = get_device(&parent->dev);
1513         rdev->rphy.dev.release = sas_end_device_release;
1514         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1515                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1516                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1517                              shost->host_no, rphy->scsi_target_id,
1518                              parent->port_identifier);
1519         } else
1520                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1521                              shost->host_no, parent->port_identifier);
1522         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1523         sas_rphy_initialize(&rdev->rphy);
1524         transport_setup_device(&rdev->rphy.dev);
1525
1526         return &rdev->rphy;
1527 }
1528 EXPORT_SYMBOL(sas_end_device_alloc);
1529
1530 /**
1531  * sas_expander_alloc - allocate an rphy for an end device
1532  * @parent: which port
1533  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1534  *
1535  * Allocates an SAS remote PHY structure, connected to @parent.
1536  *
1537  * Returns:
1538  *      SAS PHY allocated or %NULL if the allocation failed.
1539  */
1540 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1541                                     enum sas_device_type type)
1542 {
1543         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1544         struct sas_expander_device *rdev;
1545         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1546
1547         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1548                type != SAS_FANOUT_EXPANDER_DEVICE);
1549
1550         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1551         if (!rdev) {
1552                 return NULL;
1553         }
1554
1555         device_initialize(&rdev->rphy.dev);
1556         rdev->rphy.dev.parent = get_device(&parent->dev);
1557         rdev->rphy.dev.release = sas_expander_release;
1558         mutex_lock(&sas_host->lock);
1559         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1560         mutex_unlock(&sas_host->lock);
1561         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1562                      shost->host_no, rdev->rphy.scsi_target_id);
1563         rdev->rphy.identify.device_type = type;
1564         sas_rphy_initialize(&rdev->rphy);
1565         transport_setup_device(&rdev->rphy.dev);
1566
1567         return &rdev->rphy;
1568 }
1569 EXPORT_SYMBOL(sas_expander_alloc);
1570
1571 /**
1572  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1573  * @rphy:       The remote PHY to be added
1574  *
1575  * Publishes a SAS remote PHY to the rest of the system.
1576  */
1577 int sas_rphy_add(struct sas_rphy *rphy)
1578 {
1579         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1580         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1581         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1582         struct sas_identify *identify = &rphy->identify;
1583         int error;
1584
1585         if (parent->rphy)
1586                 return -ENXIO;
1587         parent->rphy = rphy;
1588
1589         error = device_add(&rphy->dev);
1590         if (error)
1591                 return error;
1592         transport_add_device(&rphy->dev);
1593         transport_configure_device(&rphy->dev);
1594         if (sas_bsg_initialize(shost, rphy))
1595                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1596
1597
1598         mutex_lock(&sas_host->lock);
1599         list_add_tail(&rphy->list, &sas_host->rphy_list);
1600         if (identify->device_type == SAS_END_DEVICE &&
1601             (identify->target_port_protocols &
1602              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1603                 rphy->scsi_target_id = sas_host->next_target_id++;
1604         else if (identify->device_type == SAS_END_DEVICE)
1605                 rphy->scsi_target_id = -1;
1606         mutex_unlock(&sas_host->lock);
1607
1608         if (identify->device_type == SAS_END_DEVICE &&
1609             rphy->scsi_target_id != -1) {
1610                 int lun;
1611
1612                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1613                         lun = SCAN_WILD_CARD;
1614                 else
1615                         lun = 0;
1616
1617                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1618                                  SCSI_SCAN_INITIAL);
1619         }
1620
1621         return 0;
1622 }
1623 EXPORT_SYMBOL(sas_rphy_add);
1624
1625 /**
1626  * sas_rphy_free  -  free a SAS remote PHY
1627  * @rphy: SAS remote PHY to free
1628  *
1629  * Frees the specified SAS remote PHY.
1630  *
1631  * Note:
1632  *   This function must only be called on a remote
1633  *   PHY that has not successfully been added using
1634  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1635  */
1636 void sas_rphy_free(struct sas_rphy *rphy)
1637 {
1638         struct device *dev = &rphy->dev;
1639         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1640         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1641
1642         mutex_lock(&sas_host->lock);
1643         list_del(&rphy->list);
1644         mutex_unlock(&sas_host->lock);
1645
1646         transport_destroy_device(dev);
1647
1648         put_device(dev);
1649 }
1650 EXPORT_SYMBOL(sas_rphy_free);
1651
1652 /**
1653  * sas_rphy_delete  -  remove and free SAS remote PHY
1654  * @rphy:       SAS remote PHY to remove and free
1655  *
1656  * Removes the specified SAS remote PHY and frees it.
1657  */
1658 void
1659 sas_rphy_delete(struct sas_rphy *rphy)
1660 {
1661         sas_rphy_remove(rphy);
1662         sas_rphy_free(rphy);
1663 }
1664 EXPORT_SYMBOL(sas_rphy_delete);
1665
1666 /**
1667  * sas_rphy_unlink  -  unlink SAS remote PHY
1668  * @rphy:       SAS remote phy to unlink from its parent port
1669  *
1670  * Removes port reference to an rphy
1671  */
1672 void sas_rphy_unlink(struct sas_rphy *rphy)
1673 {
1674         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1675
1676         parent->rphy = NULL;
1677 }
1678 EXPORT_SYMBOL(sas_rphy_unlink);
1679
1680 /**
1681  * sas_rphy_remove  -  remove SAS remote PHY
1682  * @rphy:       SAS remote phy to remove
1683  *
1684  * Removes the specified SAS remote PHY.
1685  */
1686 void
1687 sas_rphy_remove(struct sas_rphy *rphy)
1688 {
1689         struct device *dev = &rphy->dev;
1690
1691         switch (rphy->identify.device_type) {
1692         case SAS_END_DEVICE:
1693                 scsi_remove_target(dev);
1694                 break;
1695         case SAS_EDGE_EXPANDER_DEVICE:
1696         case SAS_FANOUT_EXPANDER_DEVICE:
1697                 sas_remove_children(dev);
1698                 break;
1699         default:
1700                 break;
1701         }
1702
1703         sas_rphy_unlink(rphy);
1704         sas_bsg_remove(NULL, rphy);
1705         transport_remove_device(dev);
1706         device_del(dev);
1707 }
1708 EXPORT_SYMBOL(sas_rphy_remove);
1709
1710 /**
1711  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1712  * @dev:        device to check
1713  *
1714  * Returns:
1715  *      %1 if the device represents a SAS remote PHY, %0 else
1716  */
1717 int scsi_is_sas_rphy(const struct device *dev)
1718 {
1719         return dev->release == sas_end_device_release ||
1720                 dev->release == sas_expander_release;
1721 }
1722 EXPORT_SYMBOL(scsi_is_sas_rphy);
1723
1724
1725 /*
1726  * SCSI scan helper
1727  */
1728
1729 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1730                 uint id, u64 lun)
1731 {
1732         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1733         struct sas_rphy *rphy;
1734
1735         mutex_lock(&sas_host->lock);
1736         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1737                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1738                     rphy->scsi_target_id == -1)
1739                         continue;
1740
1741                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1742                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1743                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1744                                          lun, SCSI_SCAN_MANUAL);
1745                 }
1746         }
1747         mutex_unlock(&sas_host->lock);
1748
1749         return 0;
1750 }
1751
1752
1753 /*
1754  * Setup / Teardown code
1755  */
1756
1757 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1758         i->private_##attrb[count] = dev_attr_##field;           \
1759         i->private_##attrb[count].attr.mode = perm;                     \
1760         i->attrb[count] = &i->private_##attrb[count];                   \
1761         if (test)                                                       \
1762                 count++
1763
1764 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1765         i->private_##attrb[count] = dev_attr_##field;           \
1766         i->private_##attrb[count].attr.mode = perm;                     \
1767         if (ro_test) {                                                  \
1768                 i->private_##attrb[count].attr.mode = ro_perm;          \
1769                 i->private_##attrb[count].store = NULL;                 \
1770         }                                                               \
1771         i->attrb[count] = &i->private_##attrb[count];                   \
1772         if (test)                                                       \
1773                 count++
1774
1775 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1776         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1777
1778 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1779         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1780
1781 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1782         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1783
1784 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1785         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1786                         !i->f->set_phy_speed, S_IRUGO)
1787
1788 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1789         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1790                           !i->f->func, S_IRUGO)
1791
1792 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1793         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1794
1795 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1796         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1797
1798 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1799         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1800
1801 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1802         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1803
1804 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1805         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1806
1807 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1808         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1809
1810 /**
1811  * sas_attach_transport  -  instantiate SAS transport template
1812  * @ft:         SAS transport class function template
1813  */
1814 struct scsi_transport_template *
1815 sas_attach_transport(struct sas_function_template *ft)
1816 {
1817         struct sas_internal *i;
1818         int count;
1819
1820         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1821         if (!i)
1822                 return NULL;
1823
1824         i->t.user_scan = sas_user_scan;
1825
1826         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1827         i->t.host_attrs.ac.class = &sas_host_class.class;
1828         i->t.host_attrs.ac.match = sas_host_match;
1829         transport_container_register(&i->t.host_attrs);
1830         i->t.host_size = sizeof(struct sas_host_attrs);
1831
1832         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1833         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1834         i->phy_attr_cont.ac.match = sas_phy_match;
1835         transport_container_register(&i->phy_attr_cont);
1836
1837         i->port_attr_cont.ac.class = &sas_port_class.class;
1838         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1839         i->port_attr_cont.ac.match = sas_port_match;
1840         transport_container_register(&i->port_attr_cont);
1841
1842         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1843         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1844         i->rphy_attr_cont.ac.match = sas_rphy_match;
1845         transport_container_register(&i->rphy_attr_cont);
1846
1847         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1848         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1849         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1850         transport_container_register(&i->end_dev_attr_cont);
1851
1852         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1853         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1854         i->expander_attr_cont.ac.match = sas_expander_match;
1855         transport_container_register(&i->expander_attr_cont);
1856
1857         i->f = ft;
1858
1859         count = 0;
1860         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1861         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1862         SETUP_PHY_ATTRIBUTE(device_type);
1863         SETUP_PHY_ATTRIBUTE(sas_address);
1864         SETUP_PHY_ATTRIBUTE(phy_identifier);
1865         //SETUP_PHY_ATTRIBUTE(port_identifier);
1866         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1867         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1868         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1869         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1870         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1871
1872         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1873         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1874         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1875         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1876         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1877         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1878         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1879         i->phy_attrs[count] = NULL;
1880
1881         count = 0;
1882         SETUP_PORT_ATTRIBUTE(num_phys);
1883         i->port_attrs[count] = NULL;
1884
1885         count = 0;
1886         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1887         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1888         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1889         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1890         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1891         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1892         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1893                                        get_enclosure_identifier);
1894         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1895                                        get_bay_identifier);
1896         i->rphy_attrs[count] = NULL;
1897
1898         count = 0;
1899         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1900         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1901         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1902         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1903         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1904         i->end_dev_attrs[count] = NULL;
1905
1906         count = 0;
1907         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1908         SETUP_EXPANDER_ATTRIBUTE(product_id);
1909         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1910         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1911         SETUP_EXPANDER_ATTRIBUTE(component_id);
1912         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1913         SETUP_EXPANDER_ATTRIBUTE(level);
1914         i->expander_attrs[count] = NULL;
1915
1916         return &i->t;
1917 }
1918 EXPORT_SYMBOL(sas_attach_transport);
1919
1920 /**
1921  * sas_release_transport  -  release SAS transport template instance
1922  * @t:          transport template instance
1923  */
1924 void sas_release_transport(struct scsi_transport_template *t)
1925 {
1926         struct sas_internal *i = to_sas_internal(t);
1927
1928         transport_container_unregister(&i->t.host_attrs);
1929         transport_container_unregister(&i->phy_attr_cont);
1930         transport_container_unregister(&i->port_attr_cont);
1931         transport_container_unregister(&i->rphy_attr_cont);
1932         transport_container_unregister(&i->end_dev_attr_cont);
1933         transport_container_unregister(&i->expander_attr_cont);
1934
1935         kfree(i);
1936 }
1937 EXPORT_SYMBOL(sas_release_transport);
1938
1939 static __init int sas_transport_init(void)
1940 {
1941         int error;
1942
1943         error = transport_class_register(&sas_host_class);
1944         if (error)
1945                 goto out;
1946         error = transport_class_register(&sas_phy_class);
1947         if (error)
1948                 goto out_unregister_transport;
1949         error = transport_class_register(&sas_port_class);
1950         if (error)
1951                 goto out_unregister_phy;
1952         error = transport_class_register(&sas_rphy_class);
1953         if (error)
1954                 goto out_unregister_port;
1955         error = transport_class_register(&sas_end_dev_class);
1956         if (error)
1957                 goto out_unregister_rphy;
1958         error = transport_class_register(&sas_expander_class);
1959         if (error)
1960                 goto out_unregister_end_dev;
1961
1962         return 0;
1963
1964  out_unregister_end_dev:
1965         transport_class_unregister(&sas_end_dev_class);
1966  out_unregister_rphy:
1967         transport_class_unregister(&sas_rphy_class);
1968  out_unregister_port:
1969         transport_class_unregister(&sas_port_class);
1970  out_unregister_phy:
1971         transport_class_unregister(&sas_phy_class);
1972  out_unregister_transport:
1973         transport_class_unregister(&sas_host_class);
1974  out:
1975         return error;
1976
1977 }
1978
1979 static void __exit sas_transport_exit(void)
1980 {
1981         transport_class_unregister(&sas_host_class);
1982         transport_class_unregister(&sas_phy_class);
1983         transport_class_unregister(&sas_port_class);
1984         transport_class_unregister(&sas_rphy_class);
1985         transport_class_unregister(&sas_end_dev_class);
1986         transport_class_unregister(&sas_expander_class);
1987 }
1988
1989 MODULE_AUTHOR("Christoph Hellwig");
1990 MODULE_DESCRIPTION("SAS Transport Attributes");
1991 MODULE_LICENSE("GPL");
1992
1993 module_init(sas_transport_init);
1994 module_exit(sas_transport_exit);