drivers/scsi/scsi_transport_sas.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2005-2006 Dell Inc.
   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_cmnd.h>
  37 #include <scsi/scsi_request.h>
  38 #include <scsi/scsi_device.h>
  39 #include <scsi/scsi_host.h>
  40 #include <scsi/scsi_transport.h>
  41 #include <scsi/scsi_transport_sas.h>
  42
  43 #include "scsi_sas_internal.h"
  44 struct sas_host_attrs {
  45         struct list_head rphy_list;
  46         struct mutex lock;
  47         struct request_queue *q;
  48         u32 next_target_id;
  49         u32 next_expander_id;
  50         int next_port_id;
  51 };
  52 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
  53
  54
  55 /*
  56  * Hack to allow attributes of the same name in different objects.
  57  */
  58 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  59         struct device_attribute dev_attr_##_prefix##_##_name = \
  60         __ATTR(_name,_mode,_show,_store)
  61
  62
  63 /*
  64  * Pretty printing helpers
  65  */
  66
  67 #define sas_bitfield_name_match(title, table)                   \
  68 static ssize_t                                                  \
  69 get_sas_##title##_names(u32 table_key, char *buf)               \
  70 {                                                               \
  71         char *prefix = "";                                      \
  72         ssize_t len = 0;                                        \
  73         int i;                                                  \
  74                                                                 \
  75         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  76                 if (table[i].value & table_key) {               \
  77                         len += sprintf(buf + len, "%s%s",       \
  78                                 prefix, table[i].name);         \
  79                         prefix = ", ";                          \
  80                 }                                               \
  81         }                                                       \
  82         len += sprintf(buf + len, "\n");                        \
  83         return len;                                             \
  84 }
  85
  86 #define sas_bitfield_name_set(title, table)                     \
  87 static ssize_t                                                  \
  88 set_sas_##title##_names(u32 *table_key, const char *buf)        \
  89 {                                                               \
  90         ssize_t len = 0;                                        \
  91         int i;                                                  \
  92                                                                 \
  93         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  94                 len = strlen(table[i].name);                    \
  95                 if (strncmp(buf, table[i].name, len) == 0 &&    \
  96                     (buf[len] == '\n' || buf[len] == '\0')) {   \
  97                         *table_key = table[i].value;            \
  98                         return 0;                               \
  99                 }                                               \
 100         }                                                       \
 101         return -EINVAL;                                         \
 102 }
 103
 104 #define sas_bitfield_name_search(title, table)                  \
 105 static ssize_t                                                  \
 106 get_sas_##title##_names(u32 table_key, char *buf)               \
 107 {                                                               \
 108         ssize_t len = 0;                                        \
 109         int i;                                                  \
 110                                                                 \
 111         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 112                 if (table[i].value == table_key) {              \
 113                         len += sprintf(buf + len, "%s",         \
 114                                 table[i].name);                 \
 115                         break;                                  \
 116                 }                                               \
 117         }                                                       \
 118         len += sprintf(buf + len, "\n");                        \
 119         return len;                                             \
 120 }
 121
 122 static struct {
 123         u32             value;
 124         char            *name;
 125 } sas_device_type_names[] = {
 126         { SAS_PHY_UNUSED,               "unused" },
 127         { SAS_END_DEVICE,               "end device" },
 128         { SAS_EDGE_EXPANDER_DEVICE,     "edge expander" },
 129         { SAS_FANOUT_EXPANDER_DEVICE,   "fanout expander" },
 130 };
 131 sas_bitfield_name_search(device_type, sas_device_type_names)
 132
 133
 134 static struct {
 135         u32             value;
 136         char            *name;
 137 } sas_protocol_names[] = {
 138         { SAS_PROTOCOL_SATA,            "sata" },
 139         { SAS_PROTOCOL_SMP,             "smp" },
 140         { SAS_PROTOCOL_STP,             "stp" },
 141         { SAS_PROTOCOL_SSP,             "ssp" },
 142 };
 143 sas_bitfield_name_match(protocol, sas_protocol_names)
 144
 145 static struct {
 146         u32             value;
 147         char            *name;
 148 } sas_linkspeed_names[] = {
 149         { SAS_LINK_RATE_UNKNOWN,        "Unknown" },
 150         { SAS_PHY_DISABLED,             "Phy disabled" },
 151         { SAS_LINK_RATE_FAILED,         "Link Rate failed" },
 152         { SAS_SATA_SPINUP_HOLD,         "Spin-up hold" },
 153         { SAS_LINK_RATE_1_5_GBPS,       "1.5 Gbit" },
 154         { SAS_LINK_RATE_3_0_GBPS,       "3.0 Gbit" },
 155         { SAS_LINK_RATE_6_0_GBPS,       "6.0 Gbit" },
 156         { SAS_LINK_RATE_12_0_GBPS,      "12.0 Gbit" },
 157         { SAS_LINK_RATE_22_5_GBPS,      "22.5 Gbit" },
 158 };
 159 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 160 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 161
 162 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 163 {
 164         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 165         struct sas_end_device *rdev;
 166
 167         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 168
 169         rdev = rphy_to_end_device(rphy);
 170         return rdev;
 171 }
 172
 173 static int sas_smp_dispatch(struct bsg_job *job)
 174 {
 175         struct Scsi_Host *shost = dev_to_shost(job->dev);
 176         struct sas_rphy *rphy = NULL;
 177
 178         if (!scsi_is_host_device(job->dev))
 179                 rphy = dev_to_rphy(job->dev);
 180
 181         if (!job->reply_payload.payload_len) {
 182                 dev_warn(job->dev, "space for a smp response is missing\n");
 183                 bsg_job_done(job, -EINVAL, 0);
 184                 return 0;
 185         }
 186
 187         to_sas_internal(shost->transportt)->f->smp_handler(job, shost, rphy);
 188         return 0;
 189 }
 190
 191 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 192 {
 193         struct request_queue *q;
 194
 195         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 196                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 197                 return 0;
 198         }
 199
 200         if (rphy) {
 201                 q = bsg_setup_queue(&rphy->dev, dev_name(&rphy->dev),
 202                                 sas_smp_dispatch, NULL, 0);
 203                 if (IS_ERR(q))
 204                         return PTR_ERR(q);
 205                 rphy->q = q;
 206         } else {
 207                 char name[20];
 208
 209                 snprintf(name, sizeof(name), "sas_host%d", shost->host_no);
 210                 q = bsg_setup_queue(&shost->shost_gendev, name,
 211                                 sas_smp_dispatch, NULL, 0);
 212                 if (IS_ERR(q))
 213                         return PTR_ERR(q);
 214                 to_sas_host_attrs(shost)->q = q;
 215         }
 216
 217         return 0;
 218 }
 219
 220 /*
 221  * SAS host attributes
 222  */
 223
 224 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 225                           struct device *cdev)
 226 {
 227         struct Scsi_Host *shost = dev_to_shost(dev);
 228         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 229
 230         INIT_LIST_HEAD(&sas_host->rphy_list);
 231         mutex_init(&sas_host->lock);
 232         sas_host->next_target_id = 0;
 233         sas_host->next_expander_id = 0;
 234         sas_host->next_port_id = 0;
 235
 236         if (sas_bsg_initialize(shost, NULL))
 237                 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 238                            shost->host_no);
 239
 240         return 0;
 241 }
 242
 243 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 244                            struct device *cdev)
 245 {
 246         struct Scsi_Host *shost = dev_to_shost(dev);
 247         struct request_queue *q = to_sas_host_attrs(shost)->q;
 248
 249         bsg_remove_queue(q);
 250         return 0;
 251 }
 252
 253 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 254                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 255
 256 static int sas_host_match(struct attribute_container *cont,
 257                             struct device *dev)
 258 {
 259         struct Scsi_Host *shost;
 260         struct sas_internal *i;
 261
 262         if (!scsi_is_host_device(dev))
 263                 return 0;
 264         shost = dev_to_shost(dev);
 265
 266         if (!shost->transportt)
 267                 return 0;
 268         if (shost->transportt->host_attrs.ac.class !=
 269                         &sas_host_class.class)
 270                 return 0;
 271
 272         i = to_sas_internal(shost->transportt);
 273         return &i->t.host_attrs.ac == cont;
 274 }
 275
 276 static int do_sas_phy_delete(struct device *dev, void *data)
 277 {
 278         int pass = (int)(unsigned long)data;
 279
 280         if (pass == 0 && scsi_is_sas_port(dev))
 281                 sas_port_delete(dev_to_sas_port(dev));
 282         else if (pass == 1 && scsi_is_sas_phy(dev))
 283                 sas_phy_delete(dev_to_phy(dev));
 284         return 0;
 285 }
 286
 287 /**
 288  * sas_remove_children  -  tear down a devices SAS data structures
 289  * @dev:        device belonging to the sas object
 290  *
 291  * Removes all SAS PHYs and remote PHYs for a given object
 292  */
 293 void sas_remove_children(struct device *dev)
 294 {
 295         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 296         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 297 }
 298 EXPORT_SYMBOL(sas_remove_children);
 299
 300 /**
 301  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 302  * @shost:      Scsi Host that is torn down
 303  *
 304  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
 305  * Scsi_Host as well.
 306  *
 307  * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
 308  * already removed.
 309  */
 310 void sas_remove_host(struct Scsi_Host *shost)
 311 {
 312         sas_remove_children(&shost->shost_gendev);
 313         scsi_remove_host(shost);
 314 }
 315 EXPORT_SYMBOL(sas_remove_host);
 316
 317 /**
 318  * sas_get_address - return the SAS address of the device
 319  * @sdev: scsi device
 320  *
 321  * Returns the SAS address of the scsi device
 322  */
 323 u64 sas_get_address(struct scsi_device *sdev)
 324 {
 325         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 326
 327         return rdev->rphy.identify.sas_address;
 328 }
 329 EXPORT_SYMBOL(sas_get_address);
 330
 331 /**
 332  * sas_tlr_supported - checking TLR bit in vpd 0x90
 333  * @sdev: scsi device struct
 334  *
 335  * Check Transport Layer Retries are supported or not.
 336  * If vpd page 0x90 is present, TRL is supported.
 337  *
 338  */
 339 unsigned int
 340 sas_tlr_supported(struct scsi_device *sdev)
 341 {
 342         const int vpd_len = 32;
 343         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 344         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 345         int ret = 0;
 346
 347         if (!buffer)
 348                 goto out;
 349
 350         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 351                 goto out;
 352
 353         /*
 354          * Magic numbers: the VPD Protocol page (0x90)
 355          * has a 4 byte header and then one entry per device port
 356          * the TLR bit is at offset 8 on each port entry
 357          * if we take the first port, that's at total offset 12
 358          */
 359         ret = buffer[12] & 0x01;
 360
 361  out:
 362         kfree(buffer);
 363         rdev->tlr_supported = ret;
 364         return ret;
 365
 366 }
 367 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 368
 369 /**
 370  * sas_disable_tlr - setting TLR flags
 371  * @sdev: scsi device struct
 372  *
 373  * Seting tlr_enabled flag to 0.
 374  *
 375  */
 376 void
 377 sas_disable_tlr(struct scsi_device *sdev)
 378 {
 379         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 380
 381         rdev->tlr_enabled = 0;
 382 }
 383 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 384
 385 /**
 386  * sas_enable_tlr - setting TLR flags
 387  * @sdev: scsi device struct
 388  *
 389  * Seting tlr_enabled flag 1.
 390  *
 391  */
 392 void sas_enable_tlr(struct scsi_device *sdev)
 393 {
 394         unsigned int tlr_supported = 0;
 395         tlr_supported  = sas_tlr_supported(sdev);
 396
 397         if (tlr_supported) {
 398                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 399
 400                 rdev->tlr_enabled = 1;
 401         }
 402
 403         return;
 404 }
 405 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 406
 407 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 408 {
 409         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 410         return rdev->tlr_enabled;
 411 }
 412 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 413
 414 /*
 415  * SAS Phy attributes
 416  */
 417
 418 #define sas_phy_show_simple(field, name, format_string, cast)           \
 419 static ssize_t                                                          \
 420 show_sas_phy_##name(struct device *dev,                                 \
 421                     struct device_attribute *attr, char *buf)           \
 422 {                                                                       \
 423         struct sas_phy *phy = transport_class_to_phy(dev);              \
 424                                                                         \
 425         return snprintf(buf, 20, format_string, cast phy->field);       \
 426 }
 427
 428 #define sas_phy_simple_attr(field, name, format_string, type)           \
 429         sas_phy_show_simple(field, name, format_string, (type)) \
 430 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 431
 432 #define sas_phy_show_protocol(field, name)                              \
 433 static ssize_t                                                          \
 434 show_sas_phy_##name(struct device *dev,                                 \
 435                     struct device_attribute *attr, char *buf)           \
 436 {                                                                       \
 437         struct sas_phy *phy = transport_class_to_phy(dev);              \
 438                                                                         \
 439         if (!phy->field)                                                \
 440                 return snprintf(buf, 20, "none\n");                     \
 441         return get_sas_protocol_names(phy->field, buf);         \
 442 }
 443
 444 #define sas_phy_protocol_attr(field, name)                              \
 445         sas_phy_show_protocol(field, name)                              \
 446 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 447
 448 #define sas_phy_show_linkspeed(field)                                   \
 449 static ssize_t                                                          \
 450 show_sas_phy_##field(struct device *dev,                                \
 451                      struct device_attribute *attr, char *buf)          \
 452 {                                                                       \
 453         struct sas_phy *phy = transport_class_to_phy(dev);              \
 454                                                                         \
 455         return get_sas_linkspeed_names(phy->field, buf);                \
 456 }
 457
 458 /* Fudge to tell if we're minimum or maximum */
 459 #define sas_phy_store_linkspeed(field)                                  \
 460 static ssize_t                                                          \
 461 store_sas_phy_##field(struct device *dev,                               \
 462                       struct device_attribute *attr,                    \
 463                       const char *buf,  size_t count)                   \
 464 {                                                                       \
 465         struct sas_phy *phy = transport_class_to_phy(dev);              \
 466         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 467         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 468         u32 value;                                                      \
 469         struct sas_phy_linkrates rates = {0};                           \
 470         int error;                                                      \
 471                                                                         \
 472         error = set_sas_linkspeed_names(&value, buf);                   \
 473         if (error)                                                      \
 474                 return error;                                           \
 475         rates.field = value;                                            \
 476         error = i->f->set_phy_speed(phy, &rates);                       \
 477                                                                         \
 478         return error ? error : count;                                   \
 479 }
 480
 481 #define sas_phy_linkspeed_rw_attr(field)                                \
 482         sas_phy_show_linkspeed(field)                                   \
 483         sas_phy_store_linkspeed(field)                                  \
 484 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 485         store_sas_phy_##field)
 486
 487 #define sas_phy_linkspeed_attr(field)                                   \
 488         sas_phy_show_linkspeed(field)                                   \
 489 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 490
 491
 492 #define sas_phy_show_linkerror(field)                                   \
 493 static ssize_t                                                          \
 494 show_sas_phy_##field(struct device *dev,                                \
 495                      struct device_attribute *attr, char *buf)          \
 496 {                                                                       \
 497         struct sas_phy *phy = transport_class_to_phy(dev);              \
 498         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 499         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 500         int error;                                                      \
 501                                                                         \
 502         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 503         if (error)                                                      \
 504                 return error;                                           \
 505         return snprintf(buf, 20, "%u\n", phy->field);                   \
 506 }
 507
 508 #define sas_phy_linkerror_attr(field)                                   \
 509         sas_phy_show_linkerror(field)                                   \
 510 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 511
 512
 513 static ssize_t
 514 show_sas_device_type(struct device *dev,
 515                      struct device_attribute *attr, char *buf)
 516 {
 517         struct sas_phy *phy = transport_class_to_phy(dev);
 518
 519         if (!phy->identify.device_type)
 520                 return snprintf(buf, 20, "none\n");
 521         return get_sas_device_type_names(phy->identify.device_type, buf);
 522 }
 523 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 524
 525 static ssize_t do_sas_phy_enable(struct device *dev,
 526                 size_t count, int enable)
 527 {
 528         struct sas_phy *phy = transport_class_to_phy(dev);
 529         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 530         struct sas_internal *i = to_sas_internal(shost->transportt);
 531         int error;
 532
 533         error = i->f->phy_enable(phy, enable);
 534         if (error)
 535                 return error;
 536         phy->enabled = enable;
 537         return count;
 538 };
 539
 540 static ssize_t
 541 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 542                      const char *buf, size_t count)
 543 {
 544         if (count < 1)
 545                 return -EINVAL;
 546
 547         switch (buf[0]) {
 548         case '0':
 549                 do_sas_phy_enable(dev, count, 0);
 550                 break;
 551         case '1':
 552                 do_sas_phy_enable(dev, count, 1);
 553                 break;
 554         default:
 555                 return -EINVAL;
 556         }
 557
 558         return count;
 559 }
 560
 561 static ssize_t
 562 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 563                     char *buf)
 564 {
 565         struct sas_phy *phy = transport_class_to_phy(dev);
 566
 567         return snprintf(buf, 20, "%d\n", phy->enabled);
 568 }
 569
 570 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 571                          store_sas_phy_enable);
 572
 573 static ssize_t
 574 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 575 {
 576         struct sas_phy *phy = transport_class_to_phy(dev);
 577         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 578         struct sas_internal *i = to_sas_internal(shost->transportt);
 579         int error;
 580
 581         error = i->f->phy_reset(phy, hard_reset);
 582         if (error)
 583                 return error;
 584         phy->enabled = 1;
 585         return count;
 586 };
 587
 588 static ssize_t
 589 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 590                      const char *buf, size_t count)
 591 {
 592         return do_sas_phy_reset(dev, count, 0);
 593 }
 594 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 595
 596 static ssize_t
 597 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 598                      const char *buf, size_t count)
 599 {
 600         return do_sas_phy_reset(dev, count, 1);
 601 }
 602 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 603
 604 sas_phy_protocol_attr(identify.initiator_port_protocols,
 605                 initiator_port_protocols);
 606 sas_phy_protocol_attr(identify.target_port_protocols,
 607                 target_port_protocols);
 608 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 609                 unsigned long long);
 610 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 611 sas_phy_linkspeed_attr(negotiated_linkrate);
 612 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 613 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 614 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 615 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 616 sas_phy_linkerror_attr(invalid_dword_count);
 617 sas_phy_linkerror_attr(running_disparity_error_count);
 618 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 619 sas_phy_linkerror_attr(phy_reset_problem_count);
 620
 621 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 622                          struct device *cdev)
 623 {
 624         struct sas_phy *phy = dev_to_phy(dev);
 625         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 626         struct sas_internal *i = to_sas_internal(shost->transportt);
 627
 628         if (i->f->phy_setup)
 629                 i->f->phy_setup(phy);
 630
 631         return 0;
 632 }
 633
 634 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 635                 "sas_phy", sas_phy_setup, NULL, NULL);
 636
 637 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 638 {
 639         struct Scsi_Host *shost;
 640         struct sas_internal *i;
 641
 642         if (!scsi_is_sas_phy(dev))
 643                 return 0;
 644         shost = dev_to_shost(dev->parent);
 645
 646         if (!shost->transportt)
 647                 return 0;
 648         if (shost->transportt->host_attrs.ac.class !=
 649                         &sas_host_class.class)
 650                 return 0;
 651
 652         i = to_sas_internal(shost->transportt);
 653         return &i->phy_attr_cont.ac == cont;
 654 }
 655
 656 static void sas_phy_release(struct device *dev)
 657 {
 658         struct sas_phy *phy = dev_to_phy(dev);
 659         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 660         struct sas_internal *i = to_sas_internal(shost->transportt);
 661
 662         if (i->f->phy_release)
 663                 i->f->phy_release(phy);
 664         put_device(dev->parent);
 665         kfree(phy);
 666 }
 667
 668 /**
 669  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 670  * @parent:     Parent device
 671  * @number:     Phy index
 672  *
 673  * Allocates an SAS PHY structure.  It will be added in the device tree
 674  * below the device specified by @parent, which has to be either a Scsi_Host
 675  * or sas_rphy.
 676  *
 677  * Returns:
 678  *      SAS PHY allocated or %NULL if the allocation failed.
 679  */
 680 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 681 {
 682         struct Scsi_Host *shost = dev_to_shost(parent);
 683         struct sas_phy *phy;
 684
 685         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 686         if (!phy)
 687                 return NULL;
 688
 689         phy->number = number;
 690         phy->enabled = 1;
 691
 692         device_initialize(&phy->dev);
 693         phy->dev.parent = get_device(parent);
 694         phy->dev.release = sas_phy_release;
 695         INIT_LIST_HEAD(&phy->port_siblings);
 696         if (scsi_is_sas_expander_device(parent)) {
 697                 struct sas_rphy *rphy = dev_to_rphy(parent);
 698                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 699                         rphy->scsi_target_id, number);
 700         } else
 701                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 702
 703         transport_setup_device(&phy->dev);
 704
 705         return phy;
 706 }
 707 EXPORT_SYMBOL(sas_phy_alloc);
 708
 709 /**
 710  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 711  * @phy:        The PHY to be added
 712  *
 713  * Publishes a SAS PHY to the rest of the system.
 714  */
 715 int sas_phy_add(struct sas_phy *phy)
 716 {
 717         int error;
 718
 719         error = device_add(&phy->dev);
 720         if (!error) {
 721                 transport_add_device(&phy->dev);
 722                 transport_configure_device(&phy->dev);
 723         }
 724
 725         return error;
 726 }
 727 EXPORT_SYMBOL(sas_phy_add);
 728
 729 /**
 730  * sas_phy_free  -  free a SAS PHY
 731  * @phy:        SAS PHY to free
 732  *
 733  * Frees the specified SAS PHY.
 734  *
 735  * Note:
 736  *   This function must only be called on a PHY that has not
 737  *   successfully been added using sas_phy_add().
 738  */
 739 void sas_phy_free(struct sas_phy *phy)
 740 {
 741         transport_destroy_device(&phy->dev);
 742         put_device(&phy->dev);
 743 }
 744 EXPORT_SYMBOL(sas_phy_free);
 745
 746 /**
 747  * sas_phy_delete  -  remove SAS PHY
 748  * @phy:        SAS PHY to remove
 749  *
 750  * Removes the specified SAS PHY.  If the SAS PHY has an
 751  * associated remote PHY it is removed before.
 752  */
 753 void
 754 sas_phy_delete(struct sas_phy *phy)
 755 {
 756         struct device *dev = &phy->dev;
 757
 758         /* this happens if the phy is still part of a port when deleted */
 759         BUG_ON(!list_empty(&phy->port_siblings));
 760
 761         transport_remove_device(dev);
 762         device_del(dev);
 763         transport_destroy_device(dev);
 764         put_device(dev);
 765 }
 766 EXPORT_SYMBOL(sas_phy_delete);
 767
 768 /**
 769  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 770  * @dev:        device to check
 771  *
 772  * Returns:
 773  *      %1 if the device represents a SAS PHY, %0 else
 774  */
 775 int scsi_is_sas_phy(const struct device *dev)
 776 {
 777         return dev->release == sas_phy_release;
 778 }
 779 EXPORT_SYMBOL(scsi_is_sas_phy);
 780
 781 /*
 782  * SAS Port attributes
 783  */
 784 #define sas_port_show_simple(field, name, format_string, cast)          \
 785 static ssize_t                                                          \
 786 show_sas_port_##name(struct device *dev,                                \
 787                      struct device_attribute *attr, char *buf)          \
 788 {                                                                       \
 789         struct sas_port *port = transport_class_to_sas_port(dev);       \
 790                                                                         \
 791         return snprintf(buf, 20, format_string, cast port->field);      \
 792 }
 793
 794 #define sas_port_simple_attr(field, name, format_string, type)          \
 795         sas_port_show_simple(field, name, format_string, (type))        \
 796 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 797
 798 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 799
 800 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 801                                "sas_port", NULL, NULL, NULL);
 802
 803 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 804 {
 805         struct Scsi_Host *shost;
 806         struct sas_internal *i;
 807
 808         if (!scsi_is_sas_port(dev))
 809                 return 0;
 810         shost = dev_to_shost(dev->parent);
 811
 812         if (!shost->transportt)
 813                 return 0;
 814         if (shost->transportt->host_attrs.ac.class !=
 815                         &sas_host_class.class)
 816                 return 0;
 817
 818         i = to_sas_internal(shost->transportt);
 819         return &i->port_attr_cont.ac == cont;
 820 }
 821
 822
 823 static void sas_port_release(struct device *dev)
 824 {
 825         struct sas_port *port = dev_to_sas_port(dev);
 826
 827         BUG_ON(!list_empty(&port->phy_list));
 828
 829         put_device(dev->parent);
 830         kfree(port);
 831 }
 832
 833 static void sas_port_create_link(struct sas_port *port,
 834                                  struct sas_phy *phy)
 835 {
 836         int res;
 837
 838         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 839                                 dev_name(&phy->dev));
 840         if (res)
 841                 goto err;
 842         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 843         if (res)
 844                 goto err;
 845         return;
 846 err:
 847         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 848                __func__, res);
 849 }
 850
 851 static void sas_port_delete_link(struct sas_port *port,
 852                                  struct sas_phy *phy)
 853 {
 854         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 855         sysfs_remove_link(&phy->dev.kobj, "port");
 856 }
 857
 858 /** sas_port_alloc - allocate and initialize a SAS port structure
 859  *
 860  * @parent:     parent device
 861  * @port_id:    port number
 862  *
 863  * Allocates a SAS port structure.  It will be added to the device tree
 864  * below the device specified by @parent which must be either a Scsi_Host
 865  * or a sas_expander_device.
 866  *
 867  * Returns %NULL on error
 868  */
 869 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 870 {
 871         struct Scsi_Host *shost = dev_to_shost(parent);
 872         struct sas_port *port;
 873
 874         port = kzalloc(sizeof(*port), GFP_KERNEL);
 875         if (!port)
 876                 return NULL;
 877
 878         port->port_identifier = port_id;
 879
 880         device_initialize(&port->dev);
 881
 882         port->dev.parent = get_device(parent);
 883         port->dev.release = sas_port_release;
 884
 885         mutex_init(&port->phy_list_mutex);
 886         INIT_LIST_HEAD(&port->phy_list);
 887
 888         if (scsi_is_sas_expander_device(parent)) {
 889                 struct sas_rphy *rphy = dev_to_rphy(parent);
 890                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 891                              rphy->scsi_target_id, port->port_identifier);
 892         } else
 893                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 894                              port->port_identifier);
 895
 896         transport_setup_device(&port->dev);
 897
 898         return port;
 899 }
 900 EXPORT_SYMBOL(sas_port_alloc);
 901
 902 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 903  *
 904  * @parent:     parent device
 905  *
 906  * Allocates a SAS port structure and a number to go with it.  This
 907  * interface is really for adapters where the port number has no
 908  * meansing, so the sas class should manage them.  It will be added to
 909  * the device tree below the device specified by @parent which must be
 910  * either a Scsi_Host or a sas_expander_device.
 911  *
 912  * Returns %NULL on error
 913  */
 914 struct sas_port *sas_port_alloc_num(struct device *parent)
 915 {
 916         int index;
 917         struct Scsi_Host *shost = dev_to_shost(parent);
 918         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 919
 920         /* FIXME: use idr for this eventually */
 921         mutex_lock(&sas_host->lock);
 922         if (scsi_is_sas_expander_device(parent)) {
 923                 struct sas_rphy *rphy = dev_to_rphy(parent);
 924                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 925
 926                 index = exp->next_port_id++;
 927         } else
 928                 index = sas_host->next_port_id++;
 929         mutex_unlock(&sas_host->lock);
 930         return sas_port_alloc(parent, index);
 931 }
 932 EXPORT_SYMBOL(sas_port_alloc_num);
 933
 934 /**
 935  * sas_port_add - add a SAS port to the device hierarchy
 936  * @port:       port to be added
 937  *
 938  * publishes a port to the rest of the system
 939  */
 940 int sas_port_add(struct sas_port *port)
 941 {
 942         int error;
 943
 944         /* No phys should be added until this is made visible */
 945         BUG_ON(!list_empty(&port->phy_list));
 946
 947         error = device_add(&port->dev);
 948
 949         if (error)
 950                 return error;
 951
 952         transport_add_device(&port->dev);
 953         transport_configure_device(&port->dev);
 954
 955         return 0;
 956 }
 957 EXPORT_SYMBOL(sas_port_add);
 958
 959 /**
 960  * sas_port_free  -  free a SAS PORT
 961  * @port:       SAS PORT to free
 962  *
 963  * Frees the specified SAS PORT.
 964  *
 965  * Note:
 966  *   This function must only be called on a PORT that has not
 967  *   successfully been added using sas_port_add().
 968  */
 969 void sas_port_free(struct sas_port *port)
 970 {
 971         transport_destroy_device(&port->dev);
 972         put_device(&port->dev);
 973 }
 974 EXPORT_SYMBOL(sas_port_free);
 975
 976 /**
 977  * sas_port_delete  -  remove SAS PORT
 978  * @port:       SAS PORT to remove
 979  *
 980  * Removes the specified SAS PORT.  If the SAS PORT has an
 981  * associated phys, unlink them from the port as well.
 982  */
 983 void sas_port_delete(struct sas_port *port)
 984 {
 985         struct device *dev = &port->dev;
 986         struct sas_phy *phy, *tmp_phy;
 987
 988         if (port->rphy) {
 989                 sas_rphy_delete(port->rphy);
 990                 port->rphy = NULL;
 991         }
 992
 993         mutex_lock(&port->phy_list_mutex);
 994         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
 995                                  port_siblings) {
 996                 sas_port_delete_link(port, phy);
 997                 list_del_init(&phy->port_siblings);
 998         }
 999         mutex_unlock(&port->phy_list_mutex);
1000
1001         if (port->is_backlink) {
1002                 struct device *parent = port->dev.parent;
1003
1004                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1005                 port->is_backlink = 0;
1006         }
1007
1008         transport_remove_device(dev);
1009         device_del(dev);
1010         transport_destroy_device(dev);
1011         put_device(dev);
1012 }
1013 EXPORT_SYMBOL(sas_port_delete);
1014
1015 /**
1016  * scsi_is_sas_port -  check if a struct device represents a SAS port
1017  * @dev:        device to check
1018  *
1019  * Returns:
1020  *      %1 if the device represents a SAS Port, %0 else
1021  */
1022 int scsi_is_sas_port(const struct device *dev)
1023 {
1024         return dev->release == sas_port_release;
1025 }
1026 EXPORT_SYMBOL(scsi_is_sas_port);
1027
1028 /**
1029  * sas_port_get_phy - try to take a reference on a port member
1030  * @port: port to check
1031  */
1032 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1033 {
1034         struct sas_phy *phy;
1035
1036         mutex_lock(&port->phy_list_mutex);
1037         if (list_empty(&port->phy_list))
1038                 phy = NULL;
1039         else {
1040                 struct list_head *ent = port->phy_list.next;
1041
1042                 phy = list_entry(ent, typeof(*phy), port_siblings);
1043                 get_device(&phy->dev);
1044         }
1045         mutex_unlock(&port->phy_list_mutex);
1046
1047         return phy;
1048 }
1049 EXPORT_SYMBOL(sas_port_get_phy);
1050
1051 /**
1052  * sas_port_add_phy - add another phy to a port to form a wide port
1053  * @port:       port to add the phy to
1054  * @phy:        phy to add
1055  *
1056  * When a port is initially created, it is empty (has no phys).  All
1057  * ports must have at least one phy to operated, and all wide ports
1058  * must have at least two.  The current code makes no difference
1059  * between ports and wide ports, but the only object that can be
1060  * connected to a remote device is a port, so ports must be formed on
1061  * all devices with phys if they're connected to anything.
1062  */
1063 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1064 {
1065         mutex_lock(&port->phy_list_mutex);
1066         if (unlikely(!list_empty(&phy->port_siblings))) {
1067                 /* make sure we're already on this port */
1068                 struct sas_phy *tmp;
1069
1070                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1071                         if (tmp == phy)
1072                                 break;
1073                 /* If this trips, you added a phy that was already
1074                  * part of a different port */
1075                 if (unlikely(tmp != phy)) {
1076                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1077                                    dev_name(&phy->dev));
1078                         BUG();
1079                 }
1080         } else {
1081                 sas_port_create_link(port, phy);
1082                 list_add_tail(&phy->port_siblings, &port->phy_list);
1083                 port->num_phys++;
1084         }
1085         mutex_unlock(&port->phy_list_mutex);
1086 }
1087 EXPORT_SYMBOL(sas_port_add_phy);
1088
1089 /**
1090  * sas_port_delete_phy - remove a phy from a port or wide port
1091  * @port:       port to remove the phy from
1092  * @phy:        phy to remove
1093  *
1094  * This operation is used for tearing down ports again.  It must be
1095  * done to every port or wide port before calling sas_port_delete.
1096  */
1097 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1098 {
1099         mutex_lock(&port->phy_list_mutex);
1100         sas_port_delete_link(port, phy);
1101         list_del_init(&phy->port_siblings);
1102         port->num_phys--;
1103         mutex_unlock(&port->phy_list_mutex);
1104 }
1105 EXPORT_SYMBOL(sas_port_delete_phy);
1106
1107 void sas_port_mark_backlink(struct sas_port *port)
1108 {
1109         int res;
1110         struct device *parent = port->dev.parent->parent->parent;
1111
1112         if (port->is_backlink)
1113                 return;
1114         port->is_backlink = 1;
1115         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1116                                 dev_name(parent));
1117         if (res)
1118                 goto err;
1119         return;
1120 err:
1121         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1122                __func__, res);
1123
1124 }
1125 EXPORT_SYMBOL(sas_port_mark_backlink);
1126
1127 /*
1128  * SAS remote PHY attributes.
1129  */
1130
1131 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1132 static ssize_t                                                          \
1133 show_sas_rphy_##name(struct device *dev,                                \
1134                      struct device_attribute *attr, char *buf)          \
1135 {                                                                       \
1136         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1137                                                                         \
1138         return snprintf(buf, 20, format_string, cast rphy->field);      \
1139 }
1140
1141 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1142         sas_rphy_show_simple(field, name, format_string, (type))        \
1143 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1144                 show_sas_rphy_##name, NULL)
1145
1146 #define sas_rphy_show_protocol(field, name)                             \
1147 static ssize_t                                                          \
1148 show_sas_rphy_##name(struct device *dev,                                \
1149                      struct device_attribute *attr, char *buf)          \
1150 {                                                                       \
1151         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1152                                                                         \
1153         if (!rphy->field)                                       \
1154                 return snprintf(buf, 20, "none\n");                     \
1155         return get_sas_protocol_names(rphy->field, buf);        \
1156 }
1157
1158 #define sas_rphy_protocol_attr(field, name)                             \
1159         sas_rphy_show_protocol(field, name)                             \
1160 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1161                 show_sas_rphy_##name, NULL)
1162
1163 static ssize_t
1164 show_sas_rphy_device_type(struct device *dev,
1165                           struct device_attribute *attr, char *buf)
1166 {
1167         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1168
1169         if (!rphy->identify.device_type)
1170                 return snprintf(buf, 20, "none\n");
1171         return get_sas_device_type_names(
1172                         rphy->identify.device_type, buf);
1173 }
1174
1175 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1176                 show_sas_rphy_device_type, NULL);
1177
1178 static ssize_t
1179 show_sas_rphy_enclosure_identifier(struct device *dev,
1180                                    struct device_attribute *attr, char *buf)
1181 {
1182         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1183         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1184         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1185         struct sas_internal *i = to_sas_internal(shost->transportt);
1186         u64 identifier;
1187         int error;
1188
1189         error = i->f->get_enclosure_identifier(rphy, &identifier);
1190         if (error)
1191                 return error;
1192         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1193 }
1194
1195 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1196                 show_sas_rphy_enclosure_identifier, NULL);
1197
1198 static ssize_t
1199 show_sas_rphy_bay_identifier(struct device *dev,
1200                              struct device_attribute *attr, char *buf)
1201 {
1202         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1203         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1204         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1205         struct sas_internal *i = to_sas_internal(shost->transportt);
1206         int val;
1207
1208         val = i->f->get_bay_identifier(rphy);
1209         if (val < 0)
1210                 return val;
1211         return sprintf(buf, "%d\n", val);
1212 }
1213
1214 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1215                 show_sas_rphy_bay_identifier, NULL);
1216
1217 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1218                 initiator_port_protocols);
1219 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1220 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1221                 unsigned long long);
1222 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1223 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1224
1225 /* only need 8 bytes of data plus header (4 or 8) */
1226 #define BUF_SIZE 64
1227
1228 int sas_read_port_mode_page(struct scsi_device *sdev)
1229 {
1230         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1231         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1232         struct scsi_mode_data mode_data;
1233         int error;
1234
1235         if (!buffer)
1236                 return -ENOMEM;
1237
1238         error = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1239                                 &mode_data, NULL);
1240
1241         if (error)
1242                 goto out;
1243
1244         msdata = buffer +  mode_data.header_length +
1245                 mode_data.block_descriptor_length;
1246
1247         if (msdata - buffer > BUF_SIZE - 8)
1248                 goto out;
1249
1250         error = 0;
1251
1252         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1253         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1254         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1255
1256  out:
1257         kfree(buffer);
1258         return error;
1259 }
1260 EXPORT_SYMBOL(sas_read_port_mode_page);
1261
1262 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1263                                "sas_end_device", NULL, NULL, NULL);
1264
1265 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1266 static ssize_t                                                          \
1267 show_sas_end_dev_##name(struct device *dev,                             \
1268                         struct device_attribute *attr, char *buf)       \
1269 {                                                                       \
1270         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1271         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1272                                                                         \
1273         return snprintf(buf, 20, format_string, cast rdev->field);      \
1274 }
1275
1276 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1277         sas_end_dev_show_simple(field, name, format_string, (type))     \
1278 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1279                 show_sas_end_dev_##name, NULL)
1280
1281 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1282 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1283                         "%d\n", int);
1284 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1285                         "%d\n", int);
1286 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1287                         "%d\n", int);
1288 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1289                         "%d\n", int);
1290
1291 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1292                                "sas_expander", NULL, NULL, NULL);
1293
1294 #define sas_expander_show_simple(field, name, format_string, cast)      \
1295 static ssize_t                                                          \
1296 show_sas_expander_##name(struct device *dev,                            \
1297                          struct device_attribute *attr, char *buf)      \
1298 {                                                                       \
1299         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1300         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1301                                                                         \
1302         return snprintf(buf, 20, format_string, cast edev->field);      \
1303 }
1304
1305 #define sas_expander_simple_attr(field, name, format_string, type)      \
1306         sas_expander_show_simple(field, name, format_string, (type))    \
1307 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1308                 show_sas_expander_##name, NULL)
1309
1310 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1311 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1312 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1313 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1314                          "%s\n", char *);
1315 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1316 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1317                          unsigned int);
1318 sas_expander_simple_attr(level, level, "%d\n", int);
1319
1320 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1321                 "sas_device", NULL, NULL, NULL);
1322
1323 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1324 {
1325         struct Scsi_Host *shost;
1326         struct sas_internal *i;
1327
1328         if (!scsi_is_sas_rphy(dev))
1329                 return 0;
1330         shost = dev_to_shost(dev->parent->parent);
1331
1332         if (!shost->transportt)
1333                 return 0;
1334         if (shost->transportt->host_attrs.ac.class !=
1335                         &sas_host_class.class)
1336                 return 0;
1337
1338         i = to_sas_internal(shost->transportt);
1339         return &i->rphy_attr_cont.ac == cont;
1340 }
1341
1342 static int sas_end_dev_match(struct attribute_container *cont,
1343                              struct device *dev)
1344 {
1345         struct Scsi_Host *shost;
1346         struct sas_internal *i;
1347         struct sas_rphy *rphy;
1348
1349         if (!scsi_is_sas_rphy(dev))
1350                 return 0;
1351         shost = dev_to_shost(dev->parent->parent);
1352         rphy = dev_to_rphy(dev);
1353
1354         if (!shost->transportt)
1355                 return 0;
1356         if (shost->transportt->host_attrs.ac.class !=
1357                         &sas_host_class.class)
1358                 return 0;
1359
1360         i = to_sas_internal(shost->transportt);
1361         return &i->end_dev_attr_cont.ac == cont &&
1362                 rphy->identify.device_type == SAS_END_DEVICE;
1363 }
1364
1365 static int sas_expander_match(struct attribute_container *cont,
1366                               struct device *dev)
1367 {
1368         struct Scsi_Host *shost;
1369         struct sas_internal *i;
1370         struct sas_rphy *rphy;
1371
1372         if (!scsi_is_sas_rphy(dev))
1373                 return 0;
1374         shost = dev_to_shost(dev->parent->parent);
1375         rphy = dev_to_rphy(dev);
1376
1377         if (!shost->transportt)
1378                 return 0;
1379         if (shost->transportt->host_attrs.ac.class !=
1380                         &sas_host_class.class)
1381                 return 0;
1382
1383         i = to_sas_internal(shost->transportt);
1384         return &i->expander_attr_cont.ac == cont &&
1385                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1386                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1387 }
1388
1389 static void sas_expander_release(struct device *dev)
1390 {
1391         struct sas_rphy *rphy = dev_to_rphy(dev);
1392         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1393
1394         put_device(dev->parent);
1395         kfree(edev);
1396 }
1397
1398 static void sas_end_device_release(struct device *dev)
1399 {
1400         struct sas_rphy *rphy = dev_to_rphy(dev);
1401         struct sas_end_device *edev = rphy_to_end_device(rphy);
1402
1403         put_device(dev->parent);
1404         kfree(edev);
1405 }
1406
1407 /**
1408  * sas_rphy_initialize - common rphy initialization
1409  * @rphy:       rphy to initialise
1410  *
1411  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1412  * initialise the common rphy component of each.
1413  */
1414 static void sas_rphy_initialize(struct sas_rphy *rphy)
1415 {
1416         INIT_LIST_HEAD(&rphy->list);
1417 }
1418
1419 /**
1420  * sas_end_device_alloc - allocate an rphy for an end device
1421  * @parent: which port
1422  *
1423  * Allocates an SAS remote PHY structure, connected to @parent.
1424  *
1425  * Returns:
1426  *      SAS PHY allocated or %NULL if the allocation failed.
1427  */
1428 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1429 {
1430         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1431         struct sas_end_device *rdev;
1432
1433         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1434         if (!rdev) {
1435                 return NULL;
1436         }
1437
1438         device_initialize(&rdev->rphy.dev);
1439         rdev->rphy.dev.parent = get_device(&parent->dev);
1440         rdev->rphy.dev.release = sas_end_device_release;
1441         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1442                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1443                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1444                              shost->host_no, rphy->scsi_target_id,
1445                              parent->port_identifier);
1446         } else
1447                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1448                              shost->host_no, parent->port_identifier);
1449         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1450         sas_rphy_initialize(&rdev->rphy);
1451         transport_setup_device(&rdev->rphy.dev);
1452
1453         return &rdev->rphy;
1454 }
1455 EXPORT_SYMBOL(sas_end_device_alloc);
1456
1457 /**
1458  * sas_expander_alloc - allocate an rphy for an end device
1459  * @parent: which port
1460  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1461  *
1462  * Allocates an SAS remote PHY structure, connected to @parent.
1463  *
1464  * Returns:
1465  *      SAS PHY allocated or %NULL if the allocation failed.
1466  */
1467 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1468                                     enum sas_device_type type)
1469 {
1470         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1471         struct sas_expander_device *rdev;
1472         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1473
1474         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1475                type != SAS_FANOUT_EXPANDER_DEVICE);
1476
1477         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1478         if (!rdev) {
1479                 return NULL;
1480         }
1481
1482         device_initialize(&rdev->rphy.dev);
1483         rdev->rphy.dev.parent = get_device(&parent->dev);
1484         rdev->rphy.dev.release = sas_expander_release;
1485         mutex_lock(&sas_host->lock);
1486         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1487         mutex_unlock(&sas_host->lock);
1488         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1489                      shost->host_no, rdev->rphy.scsi_target_id);
1490         rdev->rphy.identify.device_type = type;
1491         sas_rphy_initialize(&rdev->rphy);
1492         transport_setup_device(&rdev->rphy.dev);
1493
1494         return &rdev->rphy;
1495 }
1496 EXPORT_SYMBOL(sas_expander_alloc);
1497
1498 /**
1499  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1500  * @rphy:       The remote PHY to be added
1501  *
1502  * Publishes a SAS remote PHY to the rest of the system.
1503  */
1504 int sas_rphy_add(struct sas_rphy *rphy)
1505 {
1506         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1507         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1508         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1509         struct sas_identify *identify = &rphy->identify;
1510         int error;
1511
1512         if (parent->rphy)
1513                 return -ENXIO;
1514         parent->rphy = rphy;
1515
1516         error = device_add(&rphy->dev);
1517         if (error)
1518                 return error;
1519         transport_add_device(&rphy->dev);
1520         transport_configure_device(&rphy->dev);
1521         if (sas_bsg_initialize(shost, rphy))
1522                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1523
1524
1525         mutex_lock(&sas_host->lock);
1526         list_add_tail(&rphy->list, &sas_host->rphy_list);
1527         if (identify->device_type == SAS_END_DEVICE &&
1528             (identify->target_port_protocols &
1529              (SAS_PROTOCOL_SSP | SAS_PROTOCOL_STP | SAS_PROTOCOL_SATA)))
1530                 rphy->scsi_target_id = sas_host->next_target_id++;
1531         else if (identify->device_type == SAS_END_DEVICE)
1532                 rphy->scsi_target_id = -1;
1533         mutex_unlock(&sas_host->lock);
1534
1535         if (identify->device_type == SAS_END_DEVICE &&
1536             rphy->scsi_target_id != -1) {
1537                 int lun;
1538
1539                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1540                         lun = SCAN_WILD_CARD;
1541                 else
1542                         lun = 0;
1543
1544                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1545                                  SCSI_SCAN_INITIAL);
1546         }
1547
1548         return 0;
1549 }
1550 EXPORT_SYMBOL(sas_rphy_add);
1551
1552 /**
1553  * sas_rphy_free  -  free a SAS remote PHY
1554  * @rphy: SAS remote PHY to free
1555  *
1556  * Frees the specified SAS remote PHY.
1557  *
1558  * Note:
1559  *   This function must only be called on a remote
1560  *   PHY that has not successfully been added using
1561  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1562  */
1563 void sas_rphy_free(struct sas_rphy *rphy)
1564 {
1565         struct device *dev = &rphy->dev;
1566         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1567         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1568
1569         mutex_lock(&sas_host->lock);
1570         list_del(&rphy->list);
1571         mutex_unlock(&sas_host->lock);
1572
1573         transport_destroy_device(dev);
1574
1575         put_device(dev);
1576 }
1577 EXPORT_SYMBOL(sas_rphy_free);
1578
1579 /**
1580  * sas_rphy_delete  -  remove and free SAS remote PHY
1581  * @rphy:       SAS remote PHY to remove and free
1582  *
1583  * Removes the specified SAS remote PHY and frees it.
1584  */
1585 void
1586 sas_rphy_delete(struct sas_rphy *rphy)
1587 {
1588         sas_rphy_remove(rphy);
1589         sas_rphy_free(rphy);
1590 }
1591 EXPORT_SYMBOL(sas_rphy_delete);
1592
1593 /**
1594  * sas_rphy_unlink  -  unlink SAS remote PHY
1595  * @rphy:       SAS remote phy to unlink from its parent port
1596  *
1597  * Removes port reference to an rphy
1598  */
1599 void sas_rphy_unlink(struct sas_rphy *rphy)
1600 {
1601         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1602
1603         parent->rphy = NULL;
1604 }
1605 EXPORT_SYMBOL(sas_rphy_unlink);
1606
1607 /**
1608  * sas_rphy_remove  -  remove SAS remote PHY
1609  * @rphy:       SAS remote phy to remove
1610  *
1611  * Removes the specified SAS remote PHY.
1612  */
1613 void
1614 sas_rphy_remove(struct sas_rphy *rphy)
1615 {
1616         struct device *dev = &rphy->dev;
1617
1618         switch (rphy->identify.device_type) {
1619         case SAS_END_DEVICE:
1620                 scsi_remove_target(dev);
1621                 break;
1622         case SAS_EDGE_EXPANDER_DEVICE:
1623         case SAS_FANOUT_EXPANDER_DEVICE:
1624                 sas_remove_children(dev);
1625                 break;
1626         default:
1627                 break;
1628         }
1629
1630         sas_rphy_unlink(rphy);
1631         bsg_remove_queue(rphy->q);
1632         transport_remove_device(dev);
1633         device_del(dev);
1634 }
1635 EXPORT_SYMBOL(sas_rphy_remove);
1636
1637 /**
1638  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1639  * @dev:        device to check
1640  *
1641  * Returns:
1642  *      %1 if the device represents a SAS remote PHY, %0 else
1643  */
1644 int scsi_is_sas_rphy(const struct device *dev)
1645 {
1646         return dev->release == sas_end_device_release ||
1647                 dev->release == sas_expander_release;
1648 }
1649 EXPORT_SYMBOL(scsi_is_sas_rphy);
1650
1651
1652 /*
1653  * SCSI scan helper
1654  */
1655
1656 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1657                 uint id, u64 lun)
1658 {
1659         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1660         struct sas_rphy *rphy;
1661
1662         mutex_lock(&sas_host->lock);
1663         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1664                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1665                     rphy->scsi_target_id == -1)
1666                         continue;
1667
1668                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1669                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1670                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1671                                          lun, SCSI_SCAN_MANUAL);
1672                 }
1673         }
1674         mutex_unlock(&sas_host->lock);
1675
1676         return 0;
1677 }
1678
1679
1680 /*
1681  * Setup / Teardown code
1682  */
1683
1684 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1685         i->private_##attrb[count] = dev_attr_##field;           \
1686         i->private_##attrb[count].attr.mode = perm;                     \
1687         i->attrb[count] = &i->private_##attrb[count];                   \
1688         if (test)                                                       \
1689                 count++
1690
1691 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1692         i->private_##attrb[count] = dev_attr_##field;           \
1693         i->private_##attrb[count].attr.mode = perm;                     \
1694         if (ro_test) {                                                  \
1695                 i->private_##attrb[count].attr.mode = ro_perm;          \
1696                 i->private_##attrb[count].store = NULL;                 \
1697         }                                                               \
1698         i->attrb[count] = &i->private_##attrb[count];                   \
1699         if (test)                                                       \
1700                 count++
1701
1702 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1703         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1704
1705 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1706         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1707
1708 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1709         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1710
1711 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1712         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1713                         !i->f->set_phy_speed, S_IRUGO)
1714
1715 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1716         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1717                           !i->f->func, S_IRUGO)
1718
1719 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1720         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1721
1722 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1723         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1724
1725 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1726         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1727
1728 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1729         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1730
1731 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1732         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1733
1734 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1735         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1736
1737 /**
1738  * sas_attach_transport  -  instantiate SAS transport template
1739  * @ft:         SAS transport class function template
1740  */
1741 struct scsi_transport_template *
1742 sas_attach_transport(struct sas_function_template *ft)
1743 {
1744         struct sas_internal *i;
1745         int count;
1746
1747         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1748         if (!i)
1749                 return NULL;
1750
1751         i->t.user_scan = sas_user_scan;
1752
1753         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1754         i->t.host_attrs.ac.class = &sas_host_class.class;
1755         i->t.host_attrs.ac.match = sas_host_match;
1756         transport_container_register(&i->t.host_attrs);
1757         i->t.host_size = sizeof(struct sas_host_attrs);
1758
1759         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1760         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1761         i->phy_attr_cont.ac.match = sas_phy_match;
1762         transport_container_register(&i->phy_attr_cont);
1763
1764         i->port_attr_cont.ac.class = &sas_port_class.class;
1765         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1766         i->port_attr_cont.ac.match = sas_port_match;
1767         transport_container_register(&i->port_attr_cont);
1768
1769         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1770         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1771         i->rphy_attr_cont.ac.match = sas_rphy_match;
1772         transport_container_register(&i->rphy_attr_cont);
1773
1774         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1775         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1776         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1777         transport_container_register(&i->end_dev_attr_cont);
1778
1779         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1780         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1781         i->expander_attr_cont.ac.match = sas_expander_match;
1782         transport_container_register(&i->expander_attr_cont);
1783
1784         i->f = ft;
1785
1786         count = 0;
1787         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1788         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1789         SETUP_PHY_ATTRIBUTE(device_type);
1790         SETUP_PHY_ATTRIBUTE(sas_address);
1791         SETUP_PHY_ATTRIBUTE(phy_identifier);
1792         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1793         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1794         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1795         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1796         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1797
1798         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1799         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1800         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1801         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1802         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1803         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1804         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1805         i->phy_attrs[count] = NULL;
1806
1807         count = 0;
1808         SETUP_PORT_ATTRIBUTE(num_phys);
1809         i->port_attrs[count] = NULL;
1810
1811         count = 0;
1812         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1813         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1814         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1815         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1816         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1817         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1818         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1819                                        get_enclosure_identifier);
1820         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1821                                        get_bay_identifier);
1822         i->rphy_attrs[count] = NULL;
1823
1824         count = 0;
1825         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1826         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1827         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1828         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1829         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1830         i->end_dev_attrs[count] = NULL;
1831
1832         count = 0;
1833         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1834         SETUP_EXPANDER_ATTRIBUTE(product_id);
1835         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1836         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1837         SETUP_EXPANDER_ATTRIBUTE(component_id);
1838         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1839         SETUP_EXPANDER_ATTRIBUTE(level);
1840         i->expander_attrs[count] = NULL;
1841
1842         return &i->t;
1843 }
1844 EXPORT_SYMBOL(sas_attach_transport);
1845
1846 /**
1847  * sas_release_transport  -  release SAS transport template instance
1848  * @t:          transport template instance
1849  */
1850 void sas_release_transport(struct scsi_transport_template *t)
1851 {
1852         struct sas_internal *i = to_sas_internal(t);
1853
1854         transport_container_unregister(&i->t.host_attrs);
1855         transport_container_unregister(&i->phy_attr_cont);
1856         transport_container_unregister(&i->port_attr_cont);
1857         transport_container_unregister(&i->rphy_attr_cont);
1858         transport_container_unregister(&i->end_dev_attr_cont);
1859         transport_container_unregister(&i->expander_attr_cont);
1860
1861         kfree(i);
1862 }
1863 EXPORT_SYMBOL(sas_release_transport);
1864
1865 static __init int sas_transport_init(void)
1866 {
1867         int error;
1868
1869         error = transport_class_register(&sas_host_class);
1870         if (error)
1871                 goto out;
1872         error = transport_class_register(&sas_phy_class);
1873         if (error)
1874                 goto out_unregister_transport;
1875         error = transport_class_register(&sas_port_class);
1876         if (error)
1877                 goto out_unregister_phy;
1878         error = transport_class_register(&sas_rphy_class);
1879         if (error)
1880                 goto out_unregister_port;
1881         error = transport_class_register(&sas_end_dev_class);
1882         if (error)
1883                 goto out_unregister_rphy;
1884         error = transport_class_register(&sas_expander_class);
1885         if (error)
1886                 goto out_unregister_end_dev;
1887
1888         return 0;
1889
1890  out_unregister_end_dev:
1891         transport_class_unregister(&sas_end_dev_class);
1892  out_unregister_rphy:
1893         transport_class_unregister(&sas_rphy_class);
1894  out_unregister_port:
1895         transport_class_unregister(&sas_port_class);
1896  out_unregister_phy:
1897         transport_class_unregister(&sas_phy_class);
1898  out_unregister_transport:
1899         transport_class_unregister(&sas_host_class);
1900  out:
1901         return error;
1902
1903 }
1904
1905 static void __exit sas_transport_exit(void)
1906 {
1907         transport_class_unregister(&sas_host_class);
1908         transport_class_unregister(&sas_phy_class);
1909         transport_class_unregister(&sas_port_class);
1910         transport_class_unregister(&sas_rphy_class);
1911         transport_class_unregister(&sas_end_dev_class);
1912         transport_class_unregister(&sas_expander_class);
1913 }
1914
1915 MODULE_AUTHOR("Christoph Hellwig");
1916 MODULE_DESCRIPTION("SAS Transport Attributes");
1917 MODULE_LICENSE("GPL");
1918
1919 module_init(sas_transport_init);
1920 module_exit(sas_transport_exit);