drivers/scsi/scsi_transport_sas.c

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