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_tlr_supported - checking TLR bit in vpd 0x90
 387  * @sdev: scsi device struct
 388  *
 389  * Check Transport Layer Retries are supported or not.
 390  * If vpd page 0x90 is present, TRL is supported.
 391  *
 392  */
 393 unsigned int
 394 sas_tlr_supported(struct scsi_device *sdev)
 395 {
 396         const int vpd_len = 32;
 397         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 398         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 399         int ret = 0;
 400
 401         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 402                 goto out;
 403
 404         /*
 405          * Magic numbers: the VPD Protocol page (0x90)
 406          * has a 4 byte header and then one entry per device port
 407          * the TLR bit is at offset 8 on each port entry
 408          * if we take the first port, that's at total offset 12
 409          */
 410         ret = buffer[12] & 0x01;
 411
 412  out:
 413         kfree(buffer);
 414         rdev->tlr_supported = ret;
 415         return ret;
 416
 417 }
 418 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 419
 420 /**
 421  * sas_disable_tlr - setting TLR flags
 422  * @sdev: scsi device struct
 423  *
 424  * Seting tlr_enabled flag to 0.
 425  *
 426  */
 427 void
 428 sas_disable_tlr(struct scsi_device *sdev)
 429 {
 430         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 431
 432         rdev->tlr_enabled = 0;
 433 }
 434 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 435
 436 /**
 437  * sas_enable_tlr - setting TLR flags
 438  * @sdev: scsi device struct
 439  *
 440  * Seting tlr_enabled flag 1.
 441  *
 442  */
 443 void sas_enable_tlr(struct scsi_device *sdev)
 444 {
 445         unsigned int tlr_supported = 0;
 446         tlr_supported  = sas_tlr_supported(sdev);
 447
 448         if (tlr_supported) {
 449                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 450
 451                 rdev->tlr_enabled = 1;
 452         }
 453
 454         return;
 455 }
 456 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 457
 458 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 459 {
 460         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 461         return rdev->tlr_enabled;
 462 }
 463 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 464
 465 /*
 466  * SAS Phy attributes
 467  */
 468
 469 #define sas_phy_show_simple(field, name, format_string, cast)           \
 470 static ssize_t                                                          \
 471 show_sas_phy_##name(struct device *dev,                                 \
 472                     struct device_attribute *attr, char *buf)           \
 473 {                                                                       \
 474         struct sas_phy *phy = transport_class_to_phy(dev);              \
 475                                                                         \
 476         return snprintf(buf, 20, format_string, cast phy->field);       \
 477 }
 478
 479 #define sas_phy_simple_attr(field, name, format_string, type)           \
 480         sas_phy_show_simple(field, name, format_string, (type)) \
 481 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 482
 483 #define sas_phy_show_protocol(field, name)                              \
 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         if (!phy->field)                                                \
 491                 return snprintf(buf, 20, "none\n");                     \
 492         return get_sas_protocol_names(phy->field, buf);         \
 493 }
 494
 495 #define sas_phy_protocol_attr(field, name)                              \
 496         sas_phy_show_protocol(field, name)                              \
 497 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 498
 499 #define sas_phy_show_linkspeed(field)                                   \
 500 static ssize_t                                                          \
 501 show_sas_phy_##field(struct device *dev,                                \
 502                      struct device_attribute *attr, char *buf)          \
 503 {                                                                       \
 504         struct sas_phy *phy = transport_class_to_phy(dev);              \
 505                                                                         \
 506         return get_sas_linkspeed_names(phy->field, buf);                \
 507 }
 508
 509 /* Fudge to tell if we're minimum or maximum */
 510 #define sas_phy_store_linkspeed(field)                                  \
 511 static ssize_t                                                          \
 512 store_sas_phy_##field(struct device *dev,                               \
 513                       struct device_attribute *attr,                    \
 514                       const char *buf,  size_t count)                   \
 515 {                                                                       \
 516         struct sas_phy *phy = transport_class_to_phy(dev);              \
 517         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 518         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 519         u32 value;                                                      \
 520         struct sas_phy_linkrates rates = {0};                           \
 521         int error;                                                      \
 522                                                                         \
 523         error = set_sas_linkspeed_names(&value, buf);                   \
 524         if (error)                                                      \
 525                 return error;                                           \
 526         rates.field = value;                                            \
 527         error = i->f->set_phy_speed(phy, &rates);                       \
 528                                                                         \
 529         return error ? error : count;                                   \
 530 }
 531
 532 #define sas_phy_linkspeed_rw_attr(field)                                \
 533         sas_phy_show_linkspeed(field)                                   \
 534         sas_phy_store_linkspeed(field)                                  \
 535 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 536         store_sas_phy_##field)
 537
 538 #define sas_phy_linkspeed_attr(field)                                   \
 539         sas_phy_show_linkspeed(field)                                   \
 540 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 541
 542
 543 #define sas_phy_show_linkerror(field)                                   \
 544 static ssize_t                                                          \
 545 show_sas_phy_##field(struct device *dev,                                \
 546                      struct device_attribute *attr, char *buf)          \
 547 {                                                                       \
 548         struct sas_phy *phy = transport_class_to_phy(dev);              \
 549         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 550         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 551         int error;                                                      \
 552                                                                         \
 553         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 554         if (error)                                                      \
 555                 return error;                                           \
 556         return snprintf(buf, 20, "%u\n", phy->field);                   \
 557 }
 558
 559 #define sas_phy_linkerror_attr(field)                                   \
 560         sas_phy_show_linkerror(field)                                   \
 561 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 562
 563
 564 static ssize_t
 565 show_sas_device_type(struct device *dev,
 566                      struct device_attribute *attr, char *buf)
 567 {
 568         struct sas_phy *phy = transport_class_to_phy(dev);
 569
 570         if (!phy->identify.device_type)
 571                 return snprintf(buf, 20, "none\n");
 572         return get_sas_device_type_names(phy->identify.device_type, buf);
 573 }
 574 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 575
 576 static ssize_t do_sas_phy_enable(struct device *dev,
 577                 size_t count, int enable)
 578 {
 579         struct sas_phy *phy = transport_class_to_phy(dev);
 580         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 581         struct sas_internal *i = to_sas_internal(shost->transportt);
 582         int error;
 583
 584         error = i->f->phy_enable(phy, enable);
 585         if (error)
 586                 return error;
 587         phy->enabled = enable;
 588         return count;
 589 };
 590
 591 static ssize_t
 592 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 593                      const char *buf, size_t count)
 594 {
 595         if (count < 1)
 596                 return -EINVAL;
 597
 598         switch (buf[0]) {
 599         case '0':
 600                 do_sas_phy_enable(dev, count, 0);
 601                 break;
 602         case '1':
 603                 do_sas_phy_enable(dev, count, 1);
 604                 break;
 605         default:
 606                 return -EINVAL;
 607         }
 608
 609         return count;
 610 }
 611
 612 static ssize_t
 613 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 614                     char *buf)
 615 {
 616         struct sas_phy *phy = transport_class_to_phy(dev);
 617
 618         return snprintf(buf, 20, "%d", phy->enabled);
 619 }
 620
 621 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 622                          store_sas_phy_enable);
 623
 624 static ssize_t
 625 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 626 {
 627         struct sas_phy *phy = transport_class_to_phy(dev);
 628         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 629         struct sas_internal *i = to_sas_internal(shost->transportt);
 630         int error;
 631
 632         error = i->f->phy_reset(phy, hard_reset);
 633         if (error)
 634                 return error;
 635         phy->enabled = 1;
 636         return count;
 637 };
 638
 639 static ssize_t
 640 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 641                      const char *buf, size_t count)
 642 {
 643         return do_sas_phy_reset(dev, count, 0);
 644 }
 645 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 646
 647 static ssize_t
 648 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 649                      const char *buf, size_t count)
 650 {
 651         return do_sas_phy_reset(dev, count, 1);
 652 }
 653 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 654
 655 sas_phy_protocol_attr(identify.initiator_port_protocols,
 656                 initiator_port_protocols);
 657 sas_phy_protocol_attr(identify.target_port_protocols,
 658                 target_port_protocols);
 659 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 660                 unsigned long long);
 661 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 662 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 663 sas_phy_linkspeed_attr(negotiated_linkrate);
 664 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 665 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 666 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 667 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 668 sas_phy_linkerror_attr(invalid_dword_count);
 669 sas_phy_linkerror_attr(running_disparity_error_count);
 670 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 671 sas_phy_linkerror_attr(phy_reset_problem_count);
 672
 673 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 674                          struct device *cdev)
 675 {
 676         struct sas_phy *phy = dev_to_phy(dev);
 677         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 678         struct sas_internal *i = to_sas_internal(shost->transportt);
 679
 680         if (i->f->phy_setup)
 681                 i->f->phy_setup(phy);
 682
 683         return 0;
 684 }
 685
 686 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 687                 "sas_phy", sas_phy_setup, NULL, NULL);
 688
 689 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 690 {
 691         struct Scsi_Host *shost;
 692         struct sas_internal *i;
 693
 694         if (!scsi_is_sas_phy(dev))
 695                 return 0;
 696         shost = dev_to_shost(dev->parent);
 697
 698         if (!shost->transportt)
 699                 return 0;
 700         if (shost->transportt->host_attrs.ac.class !=
 701                         &sas_host_class.class)
 702                 return 0;
 703
 704         i = to_sas_internal(shost->transportt);
 705         return &i->phy_attr_cont.ac == cont;
 706 }
 707
 708 static void sas_phy_release(struct device *dev)
 709 {
 710         struct sas_phy *phy = dev_to_phy(dev);
 711         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 712         struct sas_internal *i = to_sas_internal(shost->transportt);
 713
 714         if (i->f->phy_release)
 715                 i->f->phy_release(phy);
 716         put_device(dev->parent);
 717         kfree(phy);
 718 }
 719
 720 /**
 721  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 722  * @parent:     Parent device
 723  * @number:     Phy index
 724  *
 725  * Allocates an SAS PHY structure.  It will be added in the device tree
 726  * below the device specified by @parent, which has to be either a Scsi_Host
 727  * or sas_rphy.
 728  *
 729  * Returns:
 730  *      SAS PHY allocated or %NULL if the allocation failed.
 731  */
 732 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 733 {
 734         struct Scsi_Host *shost = dev_to_shost(parent);
 735         struct sas_phy *phy;
 736
 737         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 738         if (!phy)
 739                 return NULL;
 740
 741         phy->number = number;
 742         phy->enabled = 1;
 743
 744         device_initialize(&phy->dev);
 745         phy->dev.parent = get_device(parent);
 746         phy->dev.release = sas_phy_release;
 747         INIT_LIST_HEAD(&phy->port_siblings);
 748         if (scsi_is_sas_expander_device(parent)) {
 749                 struct sas_rphy *rphy = dev_to_rphy(parent);
 750                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 751                         rphy->scsi_target_id, number);
 752         } else
 753                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 754
 755         transport_setup_device(&phy->dev);
 756
 757         return phy;
 758 }
 759 EXPORT_SYMBOL(sas_phy_alloc);
 760
 761 /**
 762  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 763  * @phy:        The PHY to be added
 764  *
 765  * Publishes a SAS PHY to the rest of the system.
 766  */
 767 int sas_phy_add(struct sas_phy *phy)
 768 {
 769         int error;
 770
 771         error = device_add(&phy->dev);
 772         if (!error) {
 773                 transport_add_device(&phy->dev);
 774                 transport_configure_device(&phy->dev);
 775         }
 776
 777         return error;
 778 }
 779 EXPORT_SYMBOL(sas_phy_add);
 780
 781 /**
 782  * sas_phy_free  -  free a SAS PHY
 783  * @phy:        SAS PHY to free
 784  *
 785  * Frees the specified SAS PHY.
 786  *
 787  * Note:
 788  *   This function must only be called on a PHY that has not
 789  *   successfully been added using sas_phy_add().
 790  */
 791 void sas_phy_free(struct sas_phy *phy)
 792 {
 793         transport_destroy_device(&phy->dev);
 794         put_device(&phy->dev);
 795 }
 796 EXPORT_SYMBOL(sas_phy_free);
 797
 798 /**
 799  * sas_phy_delete  -  remove SAS PHY
 800  * @phy:        SAS PHY to remove
 801  *
 802  * Removes the specified SAS PHY.  If the SAS PHY has an
 803  * associated remote PHY it is removed before.
 804  */
 805 void
 806 sas_phy_delete(struct sas_phy *phy)
 807 {
 808         struct device *dev = &phy->dev;
 809
 810         /* this happens if the phy is still part of a port when deleted */
 811         BUG_ON(!list_empty(&phy->port_siblings));
 812
 813         transport_remove_device(dev);
 814         device_del(dev);
 815         transport_destroy_device(dev);
 816         put_device(dev);
 817 }
 818 EXPORT_SYMBOL(sas_phy_delete);
 819
 820 /**
 821  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 822  * @dev:        device to check
 823  *
 824  * Returns:
 825  *      %1 if the device represents a SAS PHY, %0 else
 826  */
 827 int scsi_is_sas_phy(const struct device *dev)
 828 {
 829         return dev->release == sas_phy_release;
 830 }
 831 EXPORT_SYMBOL(scsi_is_sas_phy);
 832
 833 /*
 834  * SAS Port attributes
 835  */
 836 #define sas_port_show_simple(field, name, format_string, cast)          \
 837 static ssize_t                                                          \
 838 show_sas_port_##name(struct device *dev,                                \
 839                      struct device_attribute *attr, char *buf)          \
 840 {                                                                       \
 841         struct sas_port *port = transport_class_to_sas_port(dev);       \
 842                                                                         \
 843         return snprintf(buf, 20, format_string, cast port->field);      \
 844 }
 845
 846 #define sas_port_simple_attr(field, name, format_string, type)          \
 847         sas_port_show_simple(field, name, format_string, (type))        \
 848 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 849
 850 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 851
 852 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 853                                "sas_port", NULL, NULL, NULL);
 854
 855 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 856 {
 857         struct Scsi_Host *shost;
 858         struct sas_internal *i;
 859
 860         if (!scsi_is_sas_port(dev))
 861                 return 0;
 862         shost = dev_to_shost(dev->parent);
 863
 864         if (!shost->transportt)
 865                 return 0;
 866         if (shost->transportt->host_attrs.ac.class !=
 867                         &sas_host_class.class)
 868                 return 0;
 869
 870         i = to_sas_internal(shost->transportt);
 871         return &i->port_attr_cont.ac == cont;
 872 }
 873
 874
 875 static void sas_port_release(struct device *dev)
 876 {
 877         struct sas_port *port = dev_to_sas_port(dev);
 878
 879         BUG_ON(!list_empty(&port->phy_list));
 880
 881         put_device(dev->parent);
 882         kfree(port);
 883 }
 884
 885 static void sas_port_create_link(struct sas_port *port,
 886                                  struct sas_phy *phy)
 887 {
 888         int res;
 889
 890         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 891                                 dev_name(&phy->dev));
 892         if (res)
 893                 goto err;
 894         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 895         if (res)
 896                 goto err;
 897         return;
 898 err:
 899         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 900                __func__, res);
 901 }
 902
 903 static void sas_port_delete_link(struct sas_port *port,
 904                                  struct sas_phy *phy)
 905 {
 906         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 907         sysfs_remove_link(&phy->dev.kobj, "port");
 908 }
 909
 910 /** sas_port_alloc - allocate and initialize a SAS port structure
 911  *
 912  * @parent:     parent device
 913  * @port_id:    port number
 914  *
 915  * Allocates a SAS port structure.  It will be added to the device tree
 916  * below the device specified by @parent which must be either a Scsi_Host
 917  * or a sas_expander_device.
 918  *
 919  * Returns %NULL on error
 920  */
 921 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 922 {
 923         struct Scsi_Host *shost = dev_to_shost(parent);
 924         struct sas_port *port;
 925
 926         port = kzalloc(sizeof(*port), GFP_KERNEL);
 927         if (!port)
 928                 return NULL;
 929
 930         port->port_identifier = port_id;
 931
 932         device_initialize(&port->dev);
 933
 934         port->dev.parent = get_device(parent);
 935         port->dev.release = sas_port_release;
 936
 937         mutex_init(&port->phy_list_mutex);
 938         INIT_LIST_HEAD(&port->phy_list);
 939
 940         if (scsi_is_sas_expander_device(parent)) {
 941                 struct sas_rphy *rphy = dev_to_rphy(parent);
 942                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 943                              rphy->scsi_target_id, port->port_identifier);
 944         } else
 945                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 946                              port->port_identifier);
 947
 948         transport_setup_device(&port->dev);
 949
 950         return port;
 951 }
 952 EXPORT_SYMBOL(sas_port_alloc);
 953
 954 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 955  *
 956  * @parent:     parent device
 957  *
 958  * Allocates a SAS port structure and a number to go with it.  This
 959  * interface is really for adapters where the port number has no
 960  * meansing, so the sas class should manage them.  It will be added to
 961  * the device tree below the device specified by @parent which must be
 962  * either a Scsi_Host or a sas_expander_device.
 963  *
 964  * Returns %NULL on error
 965  */
 966 struct sas_port *sas_port_alloc_num(struct device *parent)
 967 {
 968         int index;
 969         struct Scsi_Host *shost = dev_to_shost(parent);
 970         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 971
 972         /* FIXME: use idr for this eventually */
 973         mutex_lock(&sas_host->lock);
 974         if (scsi_is_sas_expander_device(parent)) {
 975                 struct sas_rphy *rphy = dev_to_rphy(parent);
 976                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 977
 978                 index = exp->next_port_id++;
 979         } else
 980                 index = sas_host->next_port_id++;
 981         mutex_unlock(&sas_host->lock);
 982         return sas_port_alloc(parent, index);
 983 }
 984 EXPORT_SYMBOL(sas_port_alloc_num);
 985
 986 /**
 987  * sas_port_add - add a SAS port to the device hierarchy
 988  * @port:       port to be added
 989  *
 990  * publishes a port to the rest of the system
 991  */
 992 int sas_port_add(struct sas_port *port)
 993 {
 994         int error;
 995
 996         /* No phys should be added until this is made visible */
 997         BUG_ON(!list_empty(&port->phy_list));
 998
 999         error = device_add(&port->dev);
1000
1001         if (error)
1002                 return error;
1003
1004         transport_add_device(&port->dev);
1005         transport_configure_device(&port->dev);
1006
1007         return 0;
1008 }
1009 EXPORT_SYMBOL(sas_port_add);
1010
1011 /**
1012  * sas_port_free  -  free a SAS PORT
1013  * @port:       SAS PORT to free
1014  *
1015  * Frees the specified SAS PORT.
1016  *
1017  * Note:
1018  *   This function must only be called on a PORT that has not
1019  *   successfully been added using sas_port_add().
1020  */
1021 void sas_port_free(struct sas_port *port)
1022 {
1023         transport_destroy_device(&port->dev);
1024         put_device(&port->dev);
1025 }
1026 EXPORT_SYMBOL(sas_port_free);
1027
1028 /**
1029  * sas_port_delete  -  remove SAS PORT
1030  * @port:       SAS PORT to remove
1031  *
1032  * Removes the specified SAS PORT.  If the SAS PORT has an
1033  * associated phys, unlink them from the port as well.
1034  */
1035 void sas_port_delete(struct sas_port *port)
1036 {
1037         struct device *dev = &port->dev;
1038         struct sas_phy *phy, *tmp_phy;
1039
1040         if (port->rphy) {
1041                 sas_rphy_delete(port->rphy);
1042                 port->rphy = NULL;
1043         }
1044
1045         mutex_lock(&port->phy_list_mutex);
1046         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1047                                  port_siblings) {
1048                 sas_port_delete_link(port, phy);
1049                 list_del_init(&phy->port_siblings);
1050         }
1051         mutex_unlock(&port->phy_list_mutex);
1052
1053         if (port->is_backlink) {
1054                 struct device *parent = port->dev.parent;
1055
1056                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1057                 port->is_backlink = 0;
1058         }
1059
1060         transport_remove_device(dev);
1061         device_del(dev);
1062         transport_destroy_device(dev);
1063         put_device(dev);
1064 }
1065 EXPORT_SYMBOL(sas_port_delete);
1066
1067 /**
1068  * scsi_is_sas_port -  check if a struct device represents a SAS port
1069  * @dev:        device to check
1070  *
1071  * Returns:
1072  *      %1 if the device represents a SAS Port, %0 else
1073  */
1074 int scsi_is_sas_port(const struct device *dev)
1075 {
1076         return dev->release == sas_port_release;
1077 }
1078 EXPORT_SYMBOL(scsi_is_sas_port);
1079
1080 /**
1081  * sas_port_get_phy - try to take a reference on a port member
1082  * @port: port to check
1083  */
1084 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1085 {
1086         struct sas_phy *phy;
1087
1088         mutex_lock(&port->phy_list_mutex);
1089         if (list_empty(&port->phy_list))
1090                 phy = NULL;
1091         else {
1092                 struct list_head *ent = port->phy_list.next;
1093
1094                 phy = list_entry(ent, typeof(*phy), port_siblings);
1095                 get_device(&phy->dev);
1096         }
1097         mutex_unlock(&port->phy_list_mutex);
1098
1099         return phy;
1100 }
1101 EXPORT_SYMBOL(sas_port_get_phy);
1102
1103 /**
1104  * sas_port_add_phy - add another phy to a port to form a wide port
1105  * @port:       port to add the phy to
1106  * @phy:        phy to add
1107  *
1108  * When a port is initially created, it is empty (has no phys).  All
1109  * ports must have at least one phy to operated, and all wide ports
1110  * must have at least two.  The current code makes no difference
1111  * between ports and wide ports, but the only object that can be
1112  * connected to a remote device is a port, so ports must be formed on
1113  * all devices with phys if they're connected to anything.
1114  */
1115 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1116 {
1117         mutex_lock(&port->phy_list_mutex);
1118         if (unlikely(!list_empty(&phy->port_siblings))) {
1119                 /* make sure we're already on this port */
1120                 struct sas_phy *tmp;
1121
1122                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1123                         if (tmp == phy)
1124                                 break;
1125                 /* If this trips, you added a phy that was already
1126                  * part of a different port */
1127                 if (unlikely(tmp != phy)) {
1128                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1129                                    dev_name(&phy->dev));
1130                         BUG();
1131                 }
1132         } else {
1133                 sas_port_create_link(port, phy);
1134                 list_add_tail(&phy->port_siblings, &port->phy_list);
1135                 port->num_phys++;
1136         }
1137         mutex_unlock(&port->phy_list_mutex);
1138 }
1139 EXPORT_SYMBOL(sas_port_add_phy);
1140
1141 /**
1142  * sas_port_delete_phy - remove a phy from a port or wide port
1143  * @port:       port to remove the phy from
1144  * @phy:        phy to remove
1145  *
1146  * This operation is used for tearing down ports again.  It must be
1147  * done to every port or wide port before calling sas_port_delete.
1148  */
1149 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1150 {
1151         mutex_lock(&port->phy_list_mutex);
1152         sas_port_delete_link(port, phy);
1153         list_del_init(&phy->port_siblings);
1154         port->num_phys--;
1155         mutex_unlock(&port->phy_list_mutex);
1156 }
1157 EXPORT_SYMBOL(sas_port_delete_phy);
1158
1159 void sas_port_mark_backlink(struct sas_port *port)
1160 {
1161         int res;
1162         struct device *parent = port->dev.parent->parent->parent;
1163
1164         if (port->is_backlink)
1165                 return;
1166         port->is_backlink = 1;
1167         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1168                                 dev_name(parent));
1169         if (res)
1170                 goto err;
1171         return;
1172 err:
1173         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1174                __func__, res);
1175
1176 }
1177 EXPORT_SYMBOL(sas_port_mark_backlink);
1178
1179 /*
1180  * SAS remote PHY attributes.
1181  */
1182
1183 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1184 static ssize_t                                                          \
1185 show_sas_rphy_##name(struct device *dev,                                \
1186                      struct device_attribute *attr, char *buf)          \
1187 {                                                                       \
1188         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1189                                                                         \
1190         return snprintf(buf, 20, format_string, cast rphy->field);      \
1191 }
1192
1193 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1194         sas_rphy_show_simple(field, name, format_string, (type))        \
1195 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1196                 show_sas_rphy_##name, NULL)
1197
1198 #define sas_rphy_show_protocol(field, name)                             \
1199 static ssize_t                                                          \
1200 show_sas_rphy_##name(struct device *dev,                                \
1201                      struct device_attribute *attr, char *buf)          \
1202 {                                                                       \
1203         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1204                                                                         \
1205         if (!rphy->field)                                       \
1206                 return snprintf(buf, 20, "none\n");                     \
1207         return get_sas_protocol_names(rphy->field, buf);        \
1208 }
1209
1210 #define sas_rphy_protocol_attr(field, name)                             \
1211         sas_rphy_show_protocol(field, name)                             \
1212 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1213                 show_sas_rphy_##name, NULL)
1214
1215 static ssize_t
1216 show_sas_rphy_device_type(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->identify.device_type)
1222                 return snprintf(buf, 20, "none\n");
1223         return get_sas_device_type_names(
1224                         rphy->identify.device_type, buf);
1225 }
1226
1227 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1228                 show_sas_rphy_device_type, NULL);
1229
1230 static ssize_t
1231 show_sas_rphy_enclosure_identifier(struct device *dev,
1232                                    struct device_attribute *attr, char *buf)
1233 {
1234         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1235         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1236         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1237         struct sas_internal *i = to_sas_internal(shost->transportt);
1238         u64 identifier;
1239         int error;
1240
1241         error = i->f->get_enclosure_identifier(rphy, &identifier);
1242         if (error)
1243                 return error;
1244         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1245 }
1246
1247 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1248                 show_sas_rphy_enclosure_identifier, NULL);
1249
1250 static ssize_t
1251 show_sas_rphy_bay_identifier(struct device *dev,
1252                              struct device_attribute *attr, char *buf)
1253 {
1254         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1255         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1256         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1257         struct sas_internal *i = to_sas_internal(shost->transportt);
1258         int val;
1259
1260         val = i->f->get_bay_identifier(rphy);
1261         if (val < 0)
1262                 return val;
1263         return sprintf(buf, "%d\n", val);
1264 }
1265
1266 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1267                 show_sas_rphy_bay_identifier, NULL);
1268
1269 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1270                 initiator_port_protocols);
1271 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1272 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1273                 unsigned long long);
1274 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1275
1276 /* only need 8 bytes of data plus header (4 or 8) */
1277 #define BUF_SIZE 64
1278
1279 int sas_read_port_mode_page(struct scsi_device *sdev)
1280 {
1281         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1282         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1283         struct scsi_mode_data mode_data;
1284         int res, error;
1285
1286         if (!buffer)
1287                 return -ENOMEM;
1288
1289         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1290                               &mode_data, NULL);
1291
1292         error = -EINVAL;
1293         if (!scsi_status_is_good(res))
1294                 goto out;
1295
1296         msdata = buffer +  mode_data.header_length +
1297                 mode_data.block_descriptor_length;
1298
1299         if (msdata - buffer > BUF_SIZE - 8)
1300                 goto out;
1301
1302         error = 0;
1303
1304         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1305         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1306         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1307
1308  out:
1309         kfree(buffer);
1310         return error;
1311 }
1312 EXPORT_SYMBOL(sas_read_port_mode_page);
1313
1314 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1315                                "sas_end_device", NULL, NULL, NULL);
1316
1317 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1318 static ssize_t                                                          \
1319 show_sas_end_dev_##name(struct device *dev,                             \
1320                         struct device_attribute *attr, char *buf)       \
1321 {                                                                       \
1322         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1323         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1324                                                                         \
1325         return snprintf(buf, 20, format_string, cast rdev->field);      \
1326 }
1327
1328 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1329         sas_end_dev_show_simple(field, name, format_string, (type))     \
1330 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1331                 show_sas_end_dev_##name, NULL)
1332
1333 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1334 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1335                         "%d\n", int);
1336 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1337                         "%d\n", int);
1338 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1339                         "%d\n", int);
1340 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1341                         "%d\n", int);
1342
1343 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1344                                "sas_expander", NULL, NULL, NULL);
1345
1346 #define sas_expander_show_simple(field, name, format_string, cast)      \
1347 static ssize_t                                                          \
1348 show_sas_expander_##name(struct device *dev,                            \
1349                          struct device_attribute *attr, char *buf)      \
1350 {                                                                       \
1351         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1352         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1353                                                                         \
1354         return snprintf(buf, 20, format_string, cast edev->field);      \
1355 }
1356
1357 #define sas_expander_simple_attr(field, name, format_string, type)      \
1358         sas_expander_show_simple(field, name, format_string, (type))    \
1359 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1360                 show_sas_expander_##name, NULL)
1361
1362 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1363 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1364 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1365 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1366                          "%s\n", char *);
1367 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1368 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1369                          unsigned int);
1370 sas_expander_simple_attr(level, level, "%d\n", int);
1371
1372 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1373                 "sas_device", NULL, NULL, NULL);
1374
1375 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1376 {
1377         struct Scsi_Host *shost;
1378         struct sas_internal *i;
1379
1380         if (!scsi_is_sas_rphy(dev))
1381                 return 0;
1382         shost = dev_to_shost(dev->parent->parent);
1383
1384         if (!shost->transportt)
1385                 return 0;
1386         if (shost->transportt->host_attrs.ac.class !=
1387                         &sas_host_class.class)
1388                 return 0;
1389
1390         i = to_sas_internal(shost->transportt);
1391         return &i->rphy_attr_cont.ac == cont;
1392 }
1393
1394 static int sas_end_dev_match(struct attribute_container *cont,
1395                              struct device *dev)
1396 {
1397         struct Scsi_Host *shost;
1398         struct sas_internal *i;
1399         struct sas_rphy *rphy;
1400
1401         if (!scsi_is_sas_rphy(dev))
1402                 return 0;
1403         shost = dev_to_shost(dev->parent->parent);
1404         rphy = dev_to_rphy(dev);
1405
1406         if (!shost->transportt)
1407                 return 0;
1408         if (shost->transportt->host_attrs.ac.class !=
1409                         &sas_host_class.class)
1410                 return 0;
1411
1412         i = to_sas_internal(shost->transportt);
1413         return &i->end_dev_attr_cont.ac == cont &&
1414                 rphy->identify.device_type == SAS_END_DEVICE;
1415 }
1416
1417 static int sas_expander_match(struct attribute_container *cont,
1418                               struct device *dev)
1419 {
1420         struct Scsi_Host *shost;
1421         struct sas_internal *i;
1422         struct sas_rphy *rphy;
1423
1424         if (!scsi_is_sas_rphy(dev))
1425                 return 0;
1426         shost = dev_to_shost(dev->parent->parent);
1427         rphy = dev_to_rphy(dev);
1428
1429         if (!shost->transportt)
1430                 return 0;
1431         if (shost->transportt->host_attrs.ac.class !=
1432                         &sas_host_class.class)
1433                 return 0;
1434
1435         i = to_sas_internal(shost->transportt);
1436         return &i->expander_attr_cont.ac == cont &&
1437                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1438                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1439 }
1440
1441 static void sas_expander_release(struct device *dev)
1442 {
1443         struct sas_rphy *rphy = dev_to_rphy(dev);
1444         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1445
1446         if (rphy->q)
1447                 blk_cleanup_queue(rphy->q);
1448
1449         put_device(dev->parent);
1450         kfree(edev);
1451 }
1452
1453 static void sas_end_device_release(struct device *dev)
1454 {
1455         struct sas_rphy *rphy = dev_to_rphy(dev);
1456         struct sas_end_device *edev = rphy_to_end_device(rphy);
1457
1458         if (rphy->q)
1459                 blk_cleanup_queue(rphy->q);
1460
1461         put_device(dev->parent);
1462         kfree(edev);
1463 }
1464
1465 /**
1466  * sas_rphy_initialize - common rphy intialization
1467  * @rphy:       rphy to initialise
1468  *
1469  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1470  * initialise the common rphy component of each.
1471  */
1472 static void sas_rphy_initialize(struct sas_rphy *rphy)
1473 {
1474         INIT_LIST_HEAD(&rphy->list);
1475 }
1476
1477 /**
1478  * sas_end_device_alloc - allocate an rphy for an end device
1479  * @parent: which port
1480  *
1481  * Allocates an SAS remote PHY structure, connected to @parent.
1482  *
1483  * Returns:
1484  *      SAS PHY allocated or %NULL if the allocation failed.
1485  */
1486 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1487 {
1488         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1489         struct sas_end_device *rdev;
1490
1491         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1492         if (!rdev) {
1493                 return NULL;
1494         }
1495
1496         device_initialize(&rdev->rphy.dev);
1497         rdev->rphy.dev.parent = get_device(&parent->dev);
1498         rdev->rphy.dev.release = sas_end_device_release;
1499         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1500                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1501                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1502                              shost->host_no, rphy->scsi_target_id,
1503                              parent->port_identifier);
1504         } else
1505                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1506                              shost->host_no, parent->port_identifier);
1507         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1508         sas_rphy_initialize(&rdev->rphy);
1509         transport_setup_device(&rdev->rphy.dev);
1510
1511         return &rdev->rphy;
1512 }
1513 EXPORT_SYMBOL(sas_end_device_alloc);
1514
1515 /**
1516  * sas_expander_alloc - allocate an rphy for an end device
1517  * @parent: which port
1518  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1519  *
1520  * Allocates an SAS remote PHY structure, connected to @parent.
1521  *
1522  * Returns:
1523  *      SAS PHY allocated or %NULL if the allocation failed.
1524  */
1525 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1526                                     enum sas_device_type type)
1527 {
1528         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1529         struct sas_expander_device *rdev;
1530         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1531
1532         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1533                type != SAS_FANOUT_EXPANDER_DEVICE);
1534
1535         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1536         if (!rdev) {
1537                 return NULL;
1538         }
1539
1540         device_initialize(&rdev->rphy.dev);
1541         rdev->rphy.dev.parent = get_device(&parent->dev);
1542         rdev->rphy.dev.release = sas_expander_release;
1543         mutex_lock(&sas_host->lock);
1544         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1545         mutex_unlock(&sas_host->lock);
1546         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1547                      shost->host_no, rdev->rphy.scsi_target_id);
1548         rdev->rphy.identify.device_type = type;
1549         sas_rphy_initialize(&rdev->rphy);
1550         transport_setup_device(&rdev->rphy.dev);
1551
1552         return &rdev->rphy;
1553 }
1554 EXPORT_SYMBOL(sas_expander_alloc);
1555
1556 /**
1557  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1558  * @rphy:       The remote PHY to be added
1559  *
1560  * Publishes a SAS remote PHY to the rest of the system.
1561  */
1562 int sas_rphy_add(struct sas_rphy *rphy)
1563 {
1564         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1565         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1566         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1567         struct sas_identify *identify = &rphy->identify;
1568         int error;
1569
1570         if (parent->rphy)
1571                 return -ENXIO;
1572         parent->rphy = rphy;
1573
1574         error = device_add(&rphy->dev);
1575         if (error)
1576                 return error;
1577         transport_add_device(&rphy->dev);
1578         transport_configure_device(&rphy->dev);
1579         if (sas_bsg_initialize(shost, rphy))
1580                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1581
1582
1583         mutex_lock(&sas_host->lock);
1584         list_add_tail(&rphy->list, &sas_host->rphy_list);
1585         if (identify->device_type == SAS_END_DEVICE &&
1586             (identify->target_port_protocols &
1587              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1588                 rphy->scsi_target_id = sas_host->next_target_id++;
1589         else if (identify->device_type == SAS_END_DEVICE)
1590                 rphy->scsi_target_id = -1;
1591         mutex_unlock(&sas_host->lock);
1592
1593         if (identify->device_type == SAS_END_DEVICE &&
1594             rphy->scsi_target_id != -1) {
1595                 int lun;
1596
1597                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1598                         lun = SCAN_WILD_CARD;
1599                 else
1600                         lun = 0;
1601
1602                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
1603         }
1604
1605         return 0;
1606 }
1607 EXPORT_SYMBOL(sas_rphy_add);
1608
1609 /**
1610  * sas_rphy_free  -  free a SAS remote PHY
1611  * @rphy: SAS remote PHY to free
1612  *
1613  * Frees the specified SAS remote PHY.
1614  *
1615  * Note:
1616  *   This function must only be called on a remote
1617  *   PHY that has not successfully been added using
1618  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1619  */
1620 void sas_rphy_free(struct sas_rphy *rphy)
1621 {
1622         struct device *dev = &rphy->dev;
1623         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1624         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1625
1626         mutex_lock(&sas_host->lock);
1627         list_del(&rphy->list);
1628         mutex_unlock(&sas_host->lock);
1629
1630         transport_destroy_device(dev);
1631
1632         put_device(dev);
1633 }
1634 EXPORT_SYMBOL(sas_rphy_free);
1635
1636 /**
1637  * sas_rphy_delete  -  remove and free SAS remote PHY
1638  * @rphy:       SAS remote PHY to remove and free
1639  *
1640  * Removes the specified SAS remote PHY and frees it.
1641  */
1642 void
1643 sas_rphy_delete(struct sas_rphy *rphy)
1644 {
1645         sas_rphy_remove(rphy);
1646         sas_rphy_free(rphy);
1647 }
1648 EXPORT_SYMBOL(sas_rphy_delete);
1649
1650 /**
1651  * sas_rphy_unlink  -  unlink SAS remote PHY
1652  * @rphy:       SAS remote phy to unlink from its parent port
1653  *
1654  * Removes port reference to an rphy
1655  */
1656 void sas_rphy_unlink(struct sas_rphy *rphy)
1657 {
1658         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1659
1660         parent->rphy = NULL;
1661 }
1662 EXPORT_SYMBOL(sas_rphy_unlink);
1663
1664 /**
1665  * sas_rphy_remove  -  remove SAS remote PHY
1666  * @rphy:       SAS remote phy to remove
1667  *
1668  * Removes the specified SAS remote PHY.
1669  */
1670 void
1671 sas_rphy_remove(struct sas_rphy *rphy)
1672 {
1673         struct device *dev = &rphy->dev;
1674
1675         switch (rphy->identify.device_type) {
1676         case SAS_END_DEVICE:
1677                 scsi_remove_target(dev);
1678                 break;
1679         case SAS_EDGE_EXPANDER_DEVICE:
1680         case SAS_FANOUT_EXPANDER_DEVICE:
1681                 sas_remove_children(dev);
1682                 break;
1683         default:
1684                 break;
1685         }
1686
1687         sas_rphy_unlink(rphy);
1688         sas_bsg_remove(NULL, rphy);
1689         transport_remove_device(dev);
1690         device_del(dev);
1691 }
1692 EXPORT_SYMBOL(sas_rphy_remove);
1693
1694 /**
1695  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1696  * @dev:        device to check
1697  *
1698  * Returns:
1699  *      %1 if the device represents a SAS remote PHY, %0 else
1700  */
1701 int scsi_is_sas_rphy(const struct device *dev)
1702 {
1703         return dev->release == sas_end_device_release ||
1704                 dev->release == sas_expander_release;
1705 }
1706 EXPORT_SYMBOL(scsi_is_sas_rphy);
1707
1708
1709 /*
1710  * SCSI scan helper
1711  */
1712
1713 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1714                 uint id, u64 lun)
1715 {
1716         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1717         struct sas_rphy *rphy;
1718
1719         mutex_lock(&sas_host->lock);
1720         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1721                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1722                     rphy->scsi_target_id == -1)
1723                         continue;
1724
1725                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1726                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1727                         scsi_scan_target(&rphy->dev, 0,
1728                                          rphy->scsi_target_id, lun, 1);
1729                 }
1730         }
1731         mutex_unlock(&sas_host->lock);
1732
1733         return 0;
1734 }
1735
1736
1737 /*
1738  * Setup / Teardown code
1739  */
1740
1741 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1742         i->private_##attrb[count] = dev_attr_##field;           \
1743         i->private_##attrb[count].attr.mode = perm;                     \
1744         i->attrb[count] = &i->private_##attrb[count];                   \
1745         if (test)                                                       \
1746                 count++
1747
1748 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1749         i->private_##attrb[count] = dev_attr_##field;           \
1750         i->private_##attrb[count].attr.mode = perm;                     \
1751         if (ro_test) {                                                  \
1752                 i->private_##attrb[count].attr.mode = ro_perm;          \
1753                 i->private_##attrb[count].store = NULL;                 \
1754         }                                                               \
1755         i->attrb[count] = &i->private_##attrb[count];                   \
1756         if (test)                                                       \
1757                 count++
1758
1759 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1760         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1761
1762 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1763         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1764
1765 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1766         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1767
1768 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1769         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1770                         !i->f->set_phy_speed, S_IRUGO)
1771
1772 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1773         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1774                           !i->f->func, S_IRUGO)
1775
1776 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1777         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1778
1779 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1780         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1781
1782 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1783         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1784
1785 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1786         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1787
1788 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1789         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1790
1791 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1792         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1793
1794 /**
1795  * sas_attach_transport  -  instantiate SAS transport template
1796  * @ft:         SAS transport class function template
1797  */
1798 struct scsi_transport_template *
1799 sas_attach_transport(struct sas_function_template *ft)
1800 {
1801         struct sas_internal *i;
1802         int count;
1803
1804         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1805         if (!i)
1806                 return NULL;
1807
1808         i->t.user_scan = sas_user_scan;
1809
1810         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1811         i->t.host_attrs.ac.class = &sas_host_class.class;
1812         i->t.host_attrs.ac.match = sas_host_match;
1813         transport_container_register(&i->t.host_attrs);
1814         i->t.host_size = sizeof(struct sas_host_attrs);
1815
1816         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1817         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1818         i->phy_attr_cont.ac.match = sas_phy_match;
1819         transport_container_register(&i->phy_attr_cont);
1820
1821         i->port_attr_cont.ac.class = &sas_port_class.class;
1822         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1823         i->port_attr_cont.ac.match = sas_port_match;
1824         transport_container_register(&i->port_attr_cont);
1825
1826         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1827         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1828         i->rphy_attr_cont.ac.match = sas_rphy_match;
1829         transport_container_register(&i->rphy_attr_cont);
1830
1831         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1832         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1833         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1834         transport_container_register(&i->end_dev_attr_cont);
1835
1836         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1837         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1838         i->expander_attr_cont.ac.match = sas_expander_match;
1839         transport_container_register(&i->expander_attr_cont);
1840
1841         i->f = ft;
1842
1843         count = 0;
1844         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1845         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1846         SETUP_PHY_ATTRIBUTE(device_type);
1847         SETUP_PHY_ATTRIBUTE(sas_address);
1848         SETUP_PHY_ATTRIBUTE(phy_identifier);
1849         //SETUP_PHY_ATTRIBUTE(port_identifier);
1850         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1851         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1852         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1853         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1854         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1855
1856         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1857         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1858         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1859         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1860         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1861         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1862         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1863         i->phy_attrs[count] = NULL;
1864
1865         count = 0;
1866         SETUP_PORT_ATTRIBUTE(num_phys);
1867         i->port_attrs[count] = NULL;
1868
1869         count = 0;
1870         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1871         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1872         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1873         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1874         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1875         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1876                                        get_enclosure_identifier);
1877         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1878                                        get_bay_identifier);
1879         i->rphy_attrs[count] = NULL;
1880
1881         count = 0;
1882         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1883         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1884         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1885         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1886         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1887         i->end_dev_attrs[count] = NULL;
1888
1889         count = 0;
1890         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1891         SETUP_EXPANDER_ATTRIBUTE(product_id);
1892         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1893         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1894         SETUP_EXPANDER_ATTRIBUTE(component_id);
1895         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1896         SETUP_EXPANDER_ATTRIBUTE(level);
1897         i->expander_attrs[count] = NULL;
1898
1899         return &i->t;
1900 }
1901 EXPORT_SYMBOL(sas_attach_transport);
1902
1903 /**
1904  * sas_release_transport  -  release SAS transport template instance
1905  * @t:          transport template instance
1906  */
1907 void sas_release_transport(struct scsi_transport_template *t)
1908 {
1909         struct sas_internal *i = to_sas_internal(t);
1910
1911         transport_container_unregister(&i->t.host_attrs);
1912         transport_container_unregister(&i->phy_attr_cont);
1913         transport_container_unregister(&i->port_attr_cont);
1914         transport_container_unregister(&i->rphy_attr_cont);
1915         transport_container_unregister(&i->end_dev_attr_cont);
1916         transport_container_unregister(&i->expander_attr_cont);
1917
1918         kfree(i);
1919 }
1920 EXPORT_SYMBOL(sas_release_transport);
1921
1922 static __init int sas_transport_init(void)
1923 {
1924         int error;
1925
1926         error = transport_class_register(&sas_host_class);
1927         if (error)
1928                 goto out;
1929         error = transport_class_register(&sas_phy_class);
1930         if (error)
1931                 goto out_unregister_transport;
1932         error = transport_class_register(&sas_port_class);
1933         if (error)
1934                 goto out_unregister_phy;
1935         error = transport_class_register(&sas_rphy_class);
1936         if (error)
1937                 goto out_unregister_port;
1938         error = transport_class_register(&sas_end_dev_class);
1939         if (error)
1940                 goto out_unregister_rphy;
1941         error = transport_class_register(&sas_expander_class);
1942         if (error)
1943                 goto out_unregister_end_dev;
1944
1945         return 0;
1946
1947  out_unregister_end_dev:
1948         transport_class_unregister(&sas_end_dev_class);
1949  out_unregister_rphy:
1950         transport_class_unregister(&sas_rphy_class);
1951  out_unregister_port:
1952         transport_class_unregister(&sas_port_class);
1953  out_unregister_phy:
1954         transport_class_unregister(&sas_phy_class);
1955  out_unregister_transport:
1956         transport_class_unregister(&sas_host_class);
1957  out:
1958         return error;
1959
1960 }
1961
1962 static void __exit sas_transport_exit(void)
1963 {
1964         transport_class_unregister(&sas_host_class);
1965         transport_class_unregister(&sas_phy_class);
1966         transport_class_unregister(&sas_port_class);
1967         transport_class_unregister(&sas_rphy_class);
1968         transport_class_unregister(&sas_end_dev_class);
1969         transport_class_unregister(&sas_expander_class);
1970 }
1971
1972 MODULE_AUTHOR("Christoph Hellwig");
1973 MODULE_DESCRIPTION("SAS Transport Attributes");
1974 MODULE_LICENSE("GPL");
1975
1976 module_init(sas_transport_init);
1977 module_exit(sas_transport_exit);