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_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         { SAS_LINK_RATE_22_5_GBPS,      "22.5 Gbit" },
 157 };
 158 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 159 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 160
 161 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 162 {
 163         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 164         struct sas_end_device *rdev;
 165
 166         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 167
 168         rdev = rphy_to_end_device(rphy);
 169         return rdev;
 170 }
 171
 172 static int sas_smp_dispatch(struct bsg_job *job)
 173 {
 174         struct Scsi_Host *shost = dev_to_shost(job->dev);
 175         struct sas_rphy *rphy = NULL;
 176
 177         if (!scsi_is_host_device(job->dev))
 178                 rphy = dev_to_rphy(job->dev);
 179
 180         if (!job->reply_payload.payload_len) {
 181                 dev_warn(job->dev, "space for a smp response is missing\n");
 182                 bsg_job_done(job, -EINVAL, 0);
 183                 return 0;
 184         }
 185
 186         to_sas_internal(shost->transportt)->f->smp_handler(job, shost, rphy);
 187         return 0;
 188 }
 189
 190 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 191 {
 192         struct request_queue *q;
 193
 194         if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 195                 printk("%s can't handle SMP requests\n", shost->hostt->name);
 196                 return 0;
 197         }
 198
 199         if (rphy) {
 200                 q = bsg_setup_queue(&rphy->dev, dev_name(&rphy->dev), NULL,
 201                                 sas_smp_dispatch, NULL, 0);
 202                 if (IS_ERR(q))
 203                         return PTR_ERR(q);
 204                 rphy->q = q;
 205         } else {
 206                 char name[20];
 207
 208                 snprintf(name, sizeof(name), "sas_host%d", shost->host_no);
 209                 q = bsg_setup_queue(&shost->shost_gendev, name, NULL,
 210                                 sas_smp_dispatch, NULL, 0);
 211                 if (IS_ERR(q))
 212                         return PTR_ERR(q);
 213                 to_sas_host_attrs(shost)->q = q;
 214         }
 215
 216         return 0;
 217 }
 218
 219 /*
 220  * SAS host attributes
 221  */
 222
 223 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 224                           struct device *cdev)
 225 {
 226         struct Scsi_Host *shost = dev_to_shost(dev);
 227         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 228         struct device *dma_dev = shost->dma_dev;
 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         if (dma_dev->dma_mask) {
 241                 shost->opt_sectors = min_t(unsigned int, shost->max_sectors,
 242                                 dma_opt_mapping_size(dma_dev) >> SECTOR_SHIFT);
 243         }
 244
 245         return 0;
 246 }
 247
 248 static int sas_host_remove(struct transport_container *tc, struct device *dev,
 249                            struct device *cdev)
 250 {
 251         struct Scsi_Host *shost = dev_to_shost(dev);
 252         struct request_queue *q = to_sas_host_attrs(shost)->q;
 253
 254         bsg_remove_queue(q);
 255         return 0;
 256 }
 257
 258 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 259                 "sas_host", sas_host_setup, sas_host_remove, NULL);
 260
 261 static int sas_host_match(struct attribute_container *cont,
 262                             struct device *dev)
 263 {
 264         struct Scsi_Host *shost;
 265         struct sas_internal *i;
 266
 267         if (!scsi_is_host_device(dev))
 268                 return 0;
 269         shost = dev_to_shost(dev);
 270
 271         if (!shost->transportt)
 272                 return 0;
 273         if (shost->transportt->host_attrs.ac.class !=
 274                         &sas_host_class.class)
 275                 return 0;
 276
 277         i = to_sas_internal(shost->transportt);
 278         return &i->t.host_attrs.ac == cont;
 279 }
 280
 281 static int do_sas_phy_delete(struct device *dev, void *data)
 282 {
 283         int pass = (int)(unsigned long)data;
 284
 285         if (pass == 0 && scsi_is_sas_port(dev))
 286                 sas_port_delete(dev_to_sas_port(dev));
 287         else if (pass == 1 && scsi_is_sas_phy(dev))
 288                 sas_phy_delete(dev_to_phy(dev));
 289         return 0;
 290 }
 291
 292 /**
 293  * sas_remove_children  -  tear down a devices SAS data structures
 294  * @dev:        device belonging to the sas object
 295  *
 296  * Removes all SAS PHYs and remote PHYs for a given object
 297  */
 298 void sas_remove_children(struct device *dev)
 299 {
 300         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 301         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 302 }
 303 EXPORT_SYMBOL(sas_remove_children);
 304
 305 /**
 306  * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 307  * @shost:      Scsi Host that is torn down
 308  *
 309  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
 310  * Scsi_Host as well.
 311  *
 312  * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
 313  * already removed.
 314  */
 315 void sas_remove_host(struct Scsi_Host *shost)
 316 {
 317         sas_remove_children(&shost->shost_gendev);
 318         scsi_remove_host(shost);
 319 }
 320 EXPORT_SYMBOL(sas_remove_host);
 321
 322 /**
 323  * sas_get_address - return the SAS address of the device
 324  * @sdev: scsi device
 325  *
 326  * Returns the SAS address of the scsi device
 327  */
 328 u64 sas_get_address(struct scsi_device *sdev)
 329 {
 330         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 331
 332         return rdev->rphy.identify.sas_address;
 333 }
 334 EXPORT_SYMBOL(sas_get_address);
 335
 336 /**
 337  * sas_tlr_supported - checking TLR bit in vpd 0x90
 338  * @sdev: scsi device struct
 339  *
 340  * Check Transport Layer Retries are supported or not.
 341  * If vpd page 0x90 is present, TRL is supported.
 342  *
 343  */
 344 unsigned int
 345 sas_tlr_supported(struct scsi_device *sdev)
 346 {
 347         const int vpd_len = 32;
 348         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 349         char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 350         int ret = 0;
 351
 352         if (!buffer)
 353                 goto out;
 354
 355         if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 356                 goto out;
 357
 358         /*
 359          * Magic numbers: the VPD Protocol page (0x90)
 360          * has a 4 byte header and then one entry per device port
 361          * the TLR bit is at offset 8 on each port entry
 362          * if we take the first port, that's at total offset 12
 363          */
 364         ret = buffer[12] & 0x01;
 365
 366  out:
 367         kfree(buffer);
 368         rdev->tlr_supported = ret;
 369         return ret;
 370
 371 }
 372 EXPORT_SYMBOL_GPL(sas_tlr_supported);
 373
 374 /**
 375  * sas_disable_tlr - setting TLR flags
 376  * @sdev: scsi device struct
 377  *
 378  * Seting tlr_enabled flag to 0.
 379  *
 380  */
 381 void
 382 sas_disable_tlr(struct scsi_device *sdev)
 383 {
 384         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 385
 386         rdev->tlr_enabled = 0;
 387 }
 388 EXPORT_SYMBOL_GPL(sas_disable_tlr);
 389
 390 /**
 391  * sas_enable_tlr - setting TLR flags
 392  * @sdev: scsi device struct
 393  *
 394  * Seting tlr_enabled flag 1.
 395  *
 396  */
 397 void sas_enable_tlr(struct scsi_device *sdev)
 398 {
 399         unsigned int tlr_supported = 0;
 400         tlr_supported  = sas_tlr_supported(sdev);
 401
 402         if (tlr_supported) {
 403                 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 404
 405                 rdev->tlr_enabled = 1;
 406         }
 407
 408         return;
 409 }
 410 EXPORT_SYMBOL_GPL(sas_enable_tlr);
 411
 412 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 413 {
 414         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 415         return rdev->tlr_enabled;
 416 }
 417 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 418
 419 /**
 420  * sas_ata_ncq_prio_supported - Check for ATA NCQ command priority support
 421  * @sdev: SCSI device
 422  *
 423  * Check if an ATA device supports NCQ priority using VPD page 89h (ATA
 424  * Information). Since this VPD page is implemented only for ATA devices,
 425  * this function always returns false for SCSI devices.
 426  */
 427 bool sas_ata_ncq_prio_supported(struct scsi_device *sdev)
 428 {
 429         struct scsi_vpd *vpd;
 430         bool ncq_prio_supported = false;
 431
 432         rcu_read_lock();
 433         vpd = rcu_dereference(sdev->vpd_pg89);
 434         if (vpd && vpd->len >= 214)
 435                 ncq_prio_supported = (vpd->data[213] >> 4) & 1;
 436         rcu_read_unlock();
 437
 438         return ncq_prio_supported;
 439 }
 440 EXPORT_SYMBOL_GPL(sas_ata_ncq_prio_supported);
 441
 442 /*
 443  * SAS Phy attributes
 444  */
 445
 446 #define sas_phy_show_simple(field, name, format_string, cast)           \
 447 static ssize_t                                                          \
 448 show_sas_phy_##name(struct device *dev,                                 \
 449                     struct device_attribute *attr, char *buf)           \
 450 {                                                                       \
 451         struct sas_phy *phy = transport_class_to_phy(dev);              \
 452                                                                         \
 453         return snprintf(buf, 20, format_string, cast phy->field);       \
 454 }
 455
 456 #define sas_phy_simple_attr(field, name, format_string, type)           \
 457         sas_phy_show_simple(field, name, format_string, (type)) \
 458 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 459
 460 #define sas_phy_show_protocol(field, name)                              \
 461 static ssize_t                                                          \
 462 show_sas_phy_##name(struct device *dev,                                 \
 463                     struct device_attribute *attr, char *buf)           \
 464 {                                                                       \
 465         struct sas_phy *phy = transport_class_to_phy(dev);              \
 466                                                                         \
 467         if (!phy->field)                                                \
 468                 return snprintf(buf, 20, "none\n");                     \
 469         return get_sas_protocol_names(phy->field, buf);         \
 470 }
 471
 472 #define sas_phy_protocol_attr(field, name)                              \
 473         sas_phy_show_protocol(field, name)                              \
 474 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 475
 476 #define sas_phy_show_linkspeed(field)                                   \
 477 static ssize_t                                                          \
 478 show_sas_phy_##field(struct device *dev,                                \
 479                      struct device_attribute *attr, char *buf)          \
 480 {                                                                       \
 481         struct sas_phy *phy = transport_class_to_phy(dev);              \
 482                                                                         \
 483         return get_sas_linkspeed_names(phy->field, buf);                \
 484 }
 485
 486 /* Fudge to tell if we're minimum or maximum */
 487 #define sas_phy_store_linkspeed(field)                                  \
 488 static ssize_t                                                          \
 489 store_sas_phy_##field(struct device *dev,                               \
 490                       struct device_attribute *attr,                    \
 491                       const char *buf,  size_t count)                   \
 492 {                                                                       \
 493         struct sas_phy *phy = transport_class_to_phy(dev);              \
 494         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 495         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 496         u32 value;                                                      \
 497         struct sas_phy_linkrates rates = {0};                           \
 498         int error;                                                      \
 499                                                                         \
 500         error = set_sas_linkspeed_names(&value, buf);                   \
 501         if (error)                                                      \
 502                 return error;                                           \
 503         rates.field = value;                                            \
 504         error = i->f->set_phy_speed(phy, &rates);                       \
 505                                                                         \
 506         return error ? error : count;                                   \
 507 }
 508
 509 #define sas_phy_linkspeed_rw_attr(field)                                \
 510         sas_phy_show_linkspeed(field)                                   \
 511         sas_phy_store_linkspeed(field)                                  \
 512 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,                \
 513         store_sas_phy_##field)
 514
 515 #define sas_phy_linkspeed_attr(field)                                   \
 516         sas_phy_show_linkspeed(field)                                   \
 517 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 518
 519
 520 #define sas_phy_show_linkerror(field)                                   \
 521 static ssize_t                                                          \
 522 show_sas_phy_##field(struct device *dev,                                \
 523                      struct device_attribute *attr, char *buf)          \
 524 {                                                                       \
 525         struct sas_phy *phy = transport_class_to_phy(dev);              \
 526         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 527         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 528         int error;                                                      \
 529                                                                         \
 530         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 531         if (error)                                                      \
 532                 return error;                                           \
 533         return snprintf(buf, 20, "%u\n", phy->field);                   \
 534 }
 535
 536 #define sas_phy_linkerror_attr(field)                                   \
 537         sas_phy_show_linkerror(field)                                   \
 538 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 539
 540
 541 static ssize_t
 542 show_sas_device_type(struct device *dev,
 543                      struct device_attribute *attr, char *buf)
 544 {
 545         struct sas_phy *phy = transport_class_to_phy(dev);
 546
 547         if (!phy->identify.device_type)
 548                 return snprintf(buf, 20, "none\n");
 549         return get_sas_device_type_names(phy->identify.device_type, buf);
 550 }
 551 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 552
 553 static ssize_t do_sas_phy_enable(struct device *dev,
 554                 size_t count, int enable)
 555 {
 556         struct sas_phy *phy = transport_class_to_phy(dev);
 557         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 558         struct sas_internal *i = to_sas_internal(shost->transportt);
 559         int error;
 560
 561         error = i->f->phy_enable(phy, enable);
 562         if (error)
 563                 return error;
 564         phy->enabled = enable;
 565         return count;
 566 };
 567
 568 static ssize_t
 569 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 570                      const char *buf, size_t count)
 571 {
 572         if (count < 1)
 573                 return -EINVAL;
 574
 575         switch (buf[0]) {
 576         case '0':
 577                 do_sas_phy_enable(dev, count, 0);
 578                 break;
 579         case '1':
 580                 do_sas_phy_enable(dev, count, 1);
 581                 break;
 582         default:
 583                 return -EINVAL;
 584         }
 585
 586         return count;
 587 }
 588
 589 static ssize_t
 590 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 591                     char *buf)
 592 {
 593         struct sas_phy *phy = transport_class_to_phy(dev);
 594
 595         return snprintf(buf, 20, "%d\n", phy->enabled);
 596 }
 597
 598 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 599                          store_sas_phy_enable);
 600
 601 static ssize_t
 602 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 603 {
 604         struct sas_phy *phy = transport_class_to_phy(dev);
 605         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 606         struct sas_internal *i = to_sas_internal(shost->transportt);
 607         int error;
 608
 609         error = i->f->phy_reset(phy, hard_reset);
 610         if (error)
 611                 return error;
 612         phy->enabled = 1;
 613         return count;
 614 };
 615
 616 static ssize_t
 617 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 618                      const char *buf, size_t count)
 619 {
 620         return do_sas_phy_reset(dev, count, 0);
 621 }
 622 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 623
 624 static ssize_t
 625 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 626                      const char *buf, size_t count)
 627 {
 628         return do_sas_phy_reset(dev, count, 1);
 629 }
 630 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 631
 632 sas_phy_protocol_attr(identify.initiator_port_protocols,
 633                 initiator_port_protocols);
 634 sas_phy_protocol_attr(identify.target_port_protocols,
 635                 target_port_protocols);
 636 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 637                 unsigned long long);
 638 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 639 sas_phy_linkspeed_attr(negotiated_linkrate);
 640 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 641 sas_phy_linkspeed_rw_attr(minimum_linkrate);
 642 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 643 sas_phy_linkspeed_rw_attr(maximum_linkrate);
 644 sas_phy_linkerror_attr(invalid_dword_count);
 645 sas_phy_linkerror_attr(running_disparity_error_count);
 646 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 647 sas_phy_linkerror_attr(phy_reset_problem_count);
 648
 649 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 650                          struct device *cdev)
 651 {
 652         struct sas_phy *phy = dev_to_phy(dev);
 653         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 654         struct sas_internal *i = to_sas_internal(shost->transportt);
 655
 656         if (i->f->phy_setup)
 657                 i->f->phy_setup(phy);
 658
 659         return 0;
 660 }
 661
 662 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 663                 "sas_phy", sas_phy_setup, NULL, NULL);
 664
 665 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 666 {
 667         struct Scsi_Host *shost;
 668         struct sas_internal *i;
 669
 670         if (!scsi_is_sas_phy(dev))
 671                 return 0;
 672         shost = dev_to_shost(dev->parent);
 673
 674         if (!shost->transportt)
 675                 return 0;
 676         if (shost->transportt->host_attrs.ac.class !=
 677                         &sas_host_class.class)
 678                 return 0;
 679
 680         i = to_sas_internal(shost->transportt);
 681         return &i->phy_attr_cont.ac == cont;
 682 }
 683
 684 static void sas_phy_release(struct device *dev)
 685 {
 686         struct sas_phy *phy = dev_to_phy(dev);
 687         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 688         struct sas_internal *i = to_sas_internal(shost->transportt);
 689
 690         if (i->f->phy_release)
 691                 i->f->phy_release(phy);
 692         put_device(dev->parent);
 693         kfree(phy);
 694 }
 695
 696 /**
 697  * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 698  * @parent:     Parent device
 699  * @number:     Phy index
 700  *
 701  * Allocates an SAS PHY structure.  It will be added in the device tree
 702  * below the device specified by @parent, which has to be either a Scsi_Host
 703  * or sas_rphy.
 704  *
 705  * Returns:
 706  *      SAS PHY allocated or %NULL if the allocation failed.
 707  */
 708 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 709 {
 710         struct Scsi_Host *shost = dev_to_shost(parent);
 711         struct sas_phy *phy;
 712
 713         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 714         if (!phy)
 715                 return NULL;
 716
 717         phy->number = number;
 718         phy->enabled = 1;
 719
 720         device_initialize(&phy->dev);
 721         phy->dev.parent = get_device(parent);
 722         phy->dev.release = sas_phy_release;
 723         INIT_LIST_HEAD(&phy->port_siblings);
 724         if (scsi_is_sas_expander_device(parent)) {
 725                 struct sas_rphy *rphy = dev_to_rphy(parent);
 726                 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 727                         rphy->scsi_target_id, number);
 728         } else
 729                 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 730
 731         transport_setup_device(&phy->dev);
 732
 733         return phy;
 734 }
 735 EXPORT_SYMBOL(sas_phy_alloc);
 736
 737 /**
 738  * sas_phy_add  -  add a SAS PHY to the device hierarchy
 739  * @phy:        The PHY to be added
 740  *
 741  * Publishes a SAS PHY to the rest of the system.
 742  */
 743 int sas_phy_add(struct sas_phy *phy)
 744 {
 745         int error;
 746
 747         error = device_add(&phy->dev);
 748         if (error)
 749                 return error;
 750
 751         error = transport_add_device(&phy->dev);
 752         if (error) {
 753                 device_del(&phy->dev);
 754                 return error;
 755         }
 756         transport_configure_device(&phy->dev);
 757
 758         return 0;
 759 }
 760 EXPORT_SYMBOL(sas_phy_add);
 761
 762 /**
 763  * sas_phy_free  -  free a SAS PHY
 764  * @phy:        SAS PHY to free
 765  *
 766  * Frees the specified SAS PHY.
 767  *
 768  * Note:
 769  *   This function must only be called on a PHY that has not
 770  *   successfully been added using sas_phy_add().
 771  */
 772 void sas_phy_free(struct sas_phy *phy)
 773 {
 774         transport_destroy_device(&phy->dev);
 775         put_device(&phy->dev);
 776 }
 777 EXPORT_SYMBOL(sas_phy_free);
 778
 779 /**
 780  * sas_phy_delete  -  remove SAS PHY
 781  * @phy:        SAS PHY to remove
 782  *
 783  * Removes the specified SAS PHY.  If the SAS PHY has an
 784  * associated remote PHY it is removed before.
 785  */
 786 void
 787 sas_phy_delete(struct sas_phy *phy)
 788 {
 789         struct device *dev = &phy->dev;
 790
 791         /* this happens if the phy is still part of a port when deleted */
 792         BUG_ON(!list_empty(&phy->port_siblings));
 793
 794         transport_remove_device(dev);
 795         device_del(dev);
 796         transport_destroy_device(dev);
 797         put_device(dev);
 798 }
 799 EXPORT_SYMBOL(sas_phy_delete);
 800
 801 /**
 802  * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 803  * @dev:        device to check
 804  *
 805  * Returns:
 806  *      %1 if the device represents a SAS PHY, %0 else
 807  */
 808 int scsi_is_sas_phy(const struct device *dev)
 809 {
 810         return dev->release == sas_phy_release;
 811 }
 812 EXPORT_SYMBOL(scsi_is_sas_phy);
 813
 814 /*
 815  * SAS Port attributes
 816  */
 817 #define sas_port_show_simple(field, name, format_string, cast)          \
 818 static ssize_t                                                          \
 819 show_sas_port_##name(struct device *dev,                                \
 820                      struct device_attribute *attr, char *buf)          \
 821 {                                                                       \
 822         struct sas_port *port = transport_class_to_sas_port(dev);       \
 823                                                                         \
 824         return snprintf(buf, 20, format_string, cast port->field);      \
 825 }
 826
 827 #define sas_port_simple_attr(field, name, format_string, type)          \
 828         sas_port_show_simple(field, name, format_string, (type))        \
 829 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 830
 831 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 832
 833 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 834                                "sas_port", NULL, NULL, NULL);
 835
 836 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 837 {
 838         struct Scsi_Host *shost;
 839         struct sas_internal *i;
 840
 841         if (!scsi_is_sas_port(dev))
 842                 return 0;
 843         shost = dev_to_shost(dev->parent);
 844
 845         if (!shost->transportt)
 846                 return 0;
 847         if (shost->transportt->host_attrs.ac.class !=
 848                         &sas_host_class.class)
 849                 return 0;
 850
 851         i = to_sas_internal(shost->transportt);
 852         return &i->port_attr_cont.ac == cont;
 853 }
 854
 855
 856 static void sas_port_release(struct device *dev)
 857 {
 858         struct sas_port *port = dev_to_sas_port(dev);
 859
 860         BUG_ON(!list_empty(&port->phy_list));
 861
 862         put_device(dev->parent);
 863         kfree(port);
 864 }
 865
 866 static void sas_port_create_link(struct sas_port *port,
 867                                  struct sas_phy *phy)
 868 {
 869         int res;
 870
 871         res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 872                                 dev_name(&phy->dev));
 873         if (res)
 874                 goto err;
 875         res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 876         if (res)
 877                 goto err;
 878         return;
 879 err:
 880         printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 881                __func__, res);
 882 }
 883
 884 static void sas_port_delete_link(struct sas_port *port,
 885                                  struct sas_phy *phy)
 886 {
 887         sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 888         sysfs_remove_link(&phy->dev.kobj, "port");
 889 }
 890
 891 /** sas_port_alloc - allocate and initialize a SAS port structure
 892  *
 893  * @parent:     parent device
 894  * @port_id:    port number
 895  *
 896  * Allocates a SAS port structure.  It will be added to the device tree
 897  * below the device specified by @parent which must be either a Scsi_Host
 898  * or a sas_expander_device.
 899  *
 900  * Returns %NULL on error
 901  */
 902 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 903 {
 904         struct Scsi_Host *shost = dev_to_shost(parent);
 905         struct sas_port *port;
 906
 907         port = kzalloc(sizeof(*port), GFP_KERNEL);
 908         if (!port)
 909                 return NULL;
 910
 911         port->port_identifier = port_id;
 912
 913         device_initialize(&port->dev);
 914
 915         port->dev.parent = get_device(parent);
 916         port->dev.release = sas_port_release;
 917
 918         mutex_init(&port->phy_list_mutex);
 919         INIT_LIST_HEAD(&port->phy_list);
 920
 921         if (scsi_is_sas_expander_device(parent)) {
 922                 struct sas_rphy *rphy = dev_to_rphy(parent);
 923                 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 924                              rphy->scsi_target_id, port->port_identifier);
 925         } else
 926                 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 927                              port->port_identifier);
 928
 929         transport_setup_device(&port->dev);
 930
 931         return port;
 932 }
 933 EXPORT_SYMBOL(sas_port_alloc);
 934
 935 /** sas_port_alloc_num - allocate and initialize a SAS port structure
 936  *
 937  * @parent:     parent device
 938  *
 939  * Allocates a SAS port structure and a number to go with it.  This
 940  * interface is really for adapters where the port number has no
 941  * meansing, so the sas class should manage them.  It will be added to
 942  * the device tree below the device specified by @parent which must be
 943  * either a Scsi_Host or a sas_expander_device.
 944  *
 945  * Returns %NULL on error
 946  */
 947 struct sas_port *sas_port_alloc_num(struct device *parent)
 948 {
 949         int index;
 950         struct Scsi_Host *shost = dev_to_shost(parent);
 951         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 952
 953         /* FIXME: use idr for this eventually */
 954         mutex_lock(&sas_host->lock);
 955         if (scsi_is_sas_expander_device(parent)) {
 956                 struct sas_rphy *rphy = dev_to_rphy(parent);
 957                 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 958
 959                 index = exp->next_port_id++;
 960         } else
 961                 index = sas_host->next_port_id++;
 962         mutex_unlock(&sas_host->lock);
 963         return sas_port_alloc(parent, index);
 964 }
 965 EXPORT_SYMBOL(sas_port_alloc_num);
 966
 967 /**
 968  * sas_port_add - add a SAS port to the device hierarchy
 969  * @port:       port to be added
 970  *
 971  * publishes a port to the rest of the system
 972  */
 973 int sas_port_add(struct sas_port *port)
 974 {
 975         int error;
 976
 977         /* No phys should be added until this is made visible */
 978         BUG_ON(!list_empty(&port->phy_list));
 979
 980         error = device_add(&port->dev);
 981
 982         if (error)
 983                 return error;
 984
 985         transport_add_device(&port->dev);
 986         transport_configure_device(&port->dev);
 987
 988         return 0;
 989 }
 990 EXPORT_SYMBOL(sas_port_add);
 991
 992 /**
 993  * sas_port_free  -  free a SAS PORT
 994  * @port:       SAS PORT to free
 995  *
 996  * Frees the specified SAS PORT.
 997  *
 998  * Note:
 999  *   This function must only be called on a PORT that has not
1000  *   successfully been added using sas_port_add().
1001  */
1002 void sas_port_free(struct sas_port *port)
1003 {
1004         transport_destroy_device(&port->dev);
1005         put_device(&port->dev);
1006 }
1007 EXPORT_SYMBOL(sas_port_free);
1008
1009 /**
1010  * sas_port_delete  -  remove SAS PORT
1011  * @port:       SAS PORT to remove
1012  *
1013  * Removes the specified SAS PORT.  If the SAS PORT has an
1014  * associated phys, unlink them from the port as well.
1015  */
1016 void sas_port_delete(struct sas_port *port)
1017 {
1018         struct device *dev = &port->dev;
1019         struct sas_phy *phy, *tmp_phy;
1020
1021         if (port->rphy) {
1022                 sas_rphy_delete(port->rphy);
1023                 port->rphy = NULL;
1024         }
1025
1026         mutex_lock(&port->phy_list_mutex);
1027         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1028                                  port_siblings) {
1029                 sas_port_delete_link(port, phy);
1030                 list_del_init(&phy->port_siblings);
1031         }
1032         mutex_unlock(&port->phy_list_mutex);
1033
1034         if (port->is_backlink) {
1035                 struct device *parent = port->dev.parent;
1036
1037                 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1038                 port->is_backlink = 0;
1039         }
1040
1041         transport_remove_device(dev);
1042         device_del(dev);
1043         transport_destroy_device(dev);
1044         put_device(dev);
1045 }
1046 EXPORT_SYMBOL(sas_port_delete);
1047
1048 /**
1049  * scsi_is_sas_port -  check if a struct device represents a SAS port
1050  * @dev:        device to check
1051  *
1052  * Returns:
1053  *      %1 if the device represents a SAS Port, %0 else
1054  */
1055 int scsi_is_sas_port(const struct device *dev)
1056 {
1057         return dev->release == sas_port_release;
1058 }
1059 EXPORT_SYMBOL(scsi_is_sas_port);
1060
1061 /**
1062  * sas_port_get_phy - try to take a reference on a port member
1063  * @port: port to check
1064  */
1065 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1066 {
1067         struct sas_phy *phy;
1068
1069         mutex_lock(&port->phy_list_mutex);
1070         if (list_empty(&port->phy_list))
1071                 phy = NULL;
1072         else {
1073                 struct list_head *ent = port->phy_list.next;
1074
1075                 phy = list_entry(ent, typeof(*phy), port_siblings);
1076                 get_device(&phy->dev);
1077         }
1078         mutex_unlock(&port->phy_list_mutex);
1079
1080         return phy;
1081 }
1082 EXPORT_SYMBOL(sas_port_get_phy);
1083
1084 /**
1085  * sas_port_add_phy - add another phy to a port to form a wide port
1086  * @port:       port to add the phy to
1087  * @phy:        phy to add
1088  *
1089  * When a port is initially created, it is empty (has no phys).  All
1090  * ports must have at least one phy to operated, and all wide ports
1091  * must have at least two.  The current code makes no difference
1092  * between ports and wide ports, but the only object that can be
1093  * connected to a remote device is a port, so ports must be formed on
1094  * all devices with phys if they're connected to anything.
1095  */
1096 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1097 {
1098         mutex_lock(&port->phy_list_mutex);
1099         if (unlikely(!list_empty(&phy->port_siblings))) {
1100                 /* make sure we're already on this port */
1101                 struct sas_phy *tmp;
1102
1103                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1104                         if (tmp == phy)
1105                                 break;
1106                 /* If this trips, you added a phy that was already
1107                  * part of a different port */
1108                 if (unlikely(tmp != phy)) {
1109                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1110                                    dev_name(&phy->dev));
1111                         BUG();
1112                 }
1113         } else {
1114                 sas_port_create_link(port, phy);
1115                 list_add_tail(&phy->port_siblings, &port->phy_list);
1116                 port->num_phys++;
1117         }
1118         mutex_unlock(&port->phy_list_mutex);
1119 }
1120 EXPORT_SYMBOL(sas_port_add_phy);
1121
1122 /**
1123  * sas_port_delete_phy - remove a phy from a port or wide port
1124  * @port:       port to remove the phy from
1125  * @phy:        phy to remove
1126  *
1127  * This operation is used for tearing down ports again.  It must be
1128  * done to every port or wide port before calling sas_port_delete.
1129  */
1130 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1131 {
1132         mutex_lock(&port->phy_list_mutex);
1133         sas_port_delete_link(port, phy);
1134         list_del_init(&phy->port_siblings);
1135         port->num_phys--;
1136         mutex_unlock(&port->phy_list_mutex);
1137 }
1138 EXPORT_SYMBOL(sas_port_delete_phy);
1139
1140 void sas_port_mark_backlink(struct sas_port *port)
1141 {
1142         int res;
1143         struct device *parent = port->dev.parent->parent->parent;
1144
1145         if (port->is_backlink)
1146                 return;
1147         port->is_backlink = 1;
1148         res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1149                                 dev_name(parent));
1150         if (res)
1151                 goto err;
1152         return;
1153 err:
1154         printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1155                __func__, res);
1156
1157 }
1158 EXPORT_SYMBOL(sas_port_mark_backlink);
1159
1160 /*
1161  * SAS remote PHY attributes.
1162  */
1163
1164 #define sas_rphy_show_simple(field, name, format_string, cast)          \
1165 static ssize_t                                                          \
1166 show_sas_rphy_##name(struct device *dev,                                \
1167                      struct device_attribute *attr, char *buf)          \
1168 {                                                                       \
1169         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1170                                                                         \
1171         return snprintf(buf, 20, format_string, cast rphy->field);      \
1172 }
1173
1174 #define sas_rphy_simple_attr(field, name, format_string, type)          \
1175         sas_rphy_show_simple(field, name, format_string, (type))        \
1176 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1177                 show_sas_rphy_##name, NULL)
1178
1179 #define sas_rphy_show_protocol(field, name)                             \
1180 static ssize_t                                                          \
1181 show_sas_rphy_##name(struct device *dev,                                \
1182                      struct device_attribute *attr, char *buf)          \
1183 {                                                                       \
1184         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1185                                                                         \
1186         if (!rphy->field)                                       \
1187                 return snprintf(buf, 20, "none\n");                     \
1188         return get_sas_protocol_names(rphy->field, buf);        \
1189 }
1190
1191 #define sas_rphy_protocol_attr(field, name)                             \
1192         sas_rphy_show_protocol(field, name)                             \
1193 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,                     \
1194                 show_sas_rphy_##name, NULL)
1195
1196 static ssize_t
1197 show_sas_rphy_device_type(struct device *dev,
1198                           struct device_attribute *attr, char *buf)
1199 {
1200         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1201
1202         if (!rphy->identify.device_type)
1203                 return snprintf(buf, 20, "none\n");
1204         return get_sas_device_type_names(
1205                         rphy->identify.device_type, buf);
1206 }
1207
1208 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1209                 show_sas_rphy_device_type, NULL);
1210
1211 static ssize_t
1212 show_sas_rphy_enclosure_identifier(struct device *dev,
1213                                    struct device_attribute *attr, char *buf)
1214 {
1215         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1216         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1217         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1218         struct sas_internal *i = to_sas_internal(shost->transportt);
1219         u64 identifier;
1220         int error;
1221
1222         error = i->f->get_enclosure_identifier(rphy, &identifier);
1223         if (error)
1224                 return error;
1225         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1226 }
1227
1228 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1229                 show_sas_rphy_enclosure_identifier, NULL);
1230
1231 static ssize_t
1232 show_sas_rphy_bay_identifier(struct device *dev,
1233                              struct device_attribute *attr, char *buf)
1234 {
1235         struct sas_rphy *rphy = transport_class_to_rphy(dev);
1236         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1237         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1238         struct sas_internal *i = to_sas_internal(shost->transportt);
1239         int val;
1240
1241         val = i->f->get_bay_identifier(rphy);
1242         if (val < 0)
1243                 return val;
1244         return sprintf(buf, "%d\n", val);
1245 }
1246
1247 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1248                 show_sas_rphy_bay_identifier, NULL);
1249
1250 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1251                 initiator_port_protocols);
1252 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1253 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1254                 unsigned long long);
1255 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1256 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1257
1258 /* only need 8 bytes of data plus header (4 or 8) */
1259 #define BUF_SIZE 64
1260
1261 int sas_read_port_mode_page(struct scsi_device *sdev)
1262 {
1263         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1264         struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1265         struct scsi_mode_data mode_data;
1266         int error;
1267
1268         if (!buffer)
1269                 return -ENOMEM;
1270
1271         error = scsi_mode_sense(sdev, 1, 0x19, 0, buffer, BUF_SIZE, 30*HZ, 3,
1272                                 &mode_data, NULL);
1273
1274         if (error)
1275                 goto out;
1276
1277         msdata = buffer +  mode_data.header_length +
1278                 mode_data.block_descriptor_length;
1279
1280         if (msdata - buffer > BUF_SIZE - 8)
1281                 goto out;
1282
1283         error = 0;
1284
1285         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1286         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1287         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1288
1289  out:
1290         kfree(buffer);
1291         return error;
1292 }
1293 EXPORT_SYMBOL(sas_read_port_mode_page);
1294
1295 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1296                                "sas_end_device", NULL, NULL, NULL);
1297
1298 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
1299 static ssize_t                                                          \
1300 show_sas_end_dev_##name(struct device *dev,                             \
1301                         struct device_attribute *attr, char *buf)       \
1302 {                                                                       \
1303         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1304         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
1305                                                                         \
1306         return snprintf(buf, 20, format_string, cast rdev->field);      \
1307 }
1308
1309 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
1310         sas_end_dev_show_simple(field, name, format_string, (type))     \
1311 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO,                  \
1312                 show_sas_end_dev_##name, NULL)
1313
1314 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1315 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1316                         "%d\n", int);
1317 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1318                         "%d\n", int);
1319 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1320                         "%d\n", int);
1321 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1322                         "%d\n", int);
1323
1324 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1325                                "sas_expander", NULL, NULL, NULL);
1326
1327 #define sas_expander_show_simple(field, name, format_string, cast)      \
1328 static ssize_t                                                          \
1329 show_sas_expander_##name(struct device *dev,                            \
1330                          struct device_attribute *attr, char *buf)      \
1331 {                                                                       \
1332         struct sas_rphy *rphy = transport_class_to_rphy(dev);           \
1333         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1334                                                                         \
1335         return snprintf(buf, 20, format_string, cast edev->field);      \
1336 }
1337
1338 #define sas_expander_simple_attr(field, name, format_string, type)      \
1339         sas_expander_show_simple(field, name, format_string, (type))    \
1340 static SAS_DEVICE_ATTR(expander, name, S_IRUGO,                         \
1341                 show_sas_expander_##name, NULL)
1342
1343 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1344 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1345 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1346 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1347                          "%s\n", char *);
1348 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1349 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1350                          unsigned int);
1351 sas_expander_simple_attr(level, level, "%d\n", int);
1352
1353 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1354                 "sas_device", NULL, NULL, NULL);
1355
1356 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1357 {
1358         struct Scsi_Host *shost;
1359         struct sas_internal *i;
1360
1361         if (!scsi_is_sas_rphy(dev))
1362                 return 0;
1363         shost = dev_to_shost(dev->parent->parent);
1364
1365         if (!shost->transportt)
1366                 return 0;
1367         if (shost->transportt->host_attrs.ac.class !=
1368                         &sas_host_class.class)
1369                 return 0;
1370
1371         i = to_sas_internal(shost->transportt);
1372         return &i->rphy_attr_cont.ac == cont;
1373 }
1374
1375 static int sas_end_dev_match(struct attribute_container *cont,
1376                              struct device *dev)
1377 {
1378         struct Scsi_Host *shost;
1379         struct sas_internal *i;
1380         struct sas_rphy *rphy;
1381
1382         if (!scsi_is_sas_rphy(dev))
1383                 return 0;
1384         shost = dev_to_shost(dev->parent->parent);
1385         rphy = dev_to_rphy(dev);
1386
1387         if (!shost->transportt)
1388                 return 0;
1389         if (shost->transportt->host_attrs.ac.class !=
1390                         &sas_host_class.class)
1391                 return 0;
1392
1393         i = to_sas_internal(shost->transportt);
1394         return &i->end_dev_attr_cont.ac == cont &&
1395                 rphy->identify.device_type == SAS_END_DEVICE;
1396 }
1397
1398 static int sas_expander_match(struct attribute_container *cont,
1399                               struct device *dev)
1400 {
1401         struct Scsi_Host *shost;
1402         struct sas_internal *i;
1403         struct sas_rphy *rphy;
1404
1405         if (!scsi_is_sas_rphy(dev))
1406                 return 0;
1407         shost = dev_to_shost(dev->parent->parent);
1408         rphy = dev_to_rphy(dev);
1409
1410         if (!shost->transportt)
1411                 return 0;
1412         if (shost->transportt->host_attrs.ac.class !=
1413                         &sas_host_class.class)
1414                 return 0;
1415
1416         i = to_sas_internal(shost->transportt);
1417         return &i->expander_attr_cont.ac == cont &&
1418                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1419                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1420 }
1421
1422 static void sas_expander_release(struct device *dev)
1423 {
1424         struct sas_rphy *rphy = dev_to_rphy(dev);
1425         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1426
1427         put_device(dev->parent);
1428         kfree(edev);
1429 }
1430
1431 static void sas_end_device_release(struct device *dev)
1432 {
1433         struct sas_rphy *rphy = dev_to_rphy(dev);
1434         struct sas_end_device *edev = rphy_to_end_device(rphy);
1435
1436         put_device(dev->parent);
1437         kfree(edev);
1438 }
1439
1440 /**
1441  * sas_rphy_initialize - common rphy initialization
1442  * @rphy:       rphy to initialise
1443  *
1444  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1445  * initialise the common rphy component of each.
1446  */
1447 static void sas_rphy_initialize(struct sas_rphy *rphy)
1448 {
1449         INIT_LIST_HEAD(&rphy->list);
1450 }
1451
1452 /**
1453  * sas_end_device_alloc - allocate an rphy for an end device
1454  * @parent: which port
1455  *
1456  * Allocates an SAS remote PHY structure, connected to @parent.
1457  *
1458  * Returns:
1459  *      SAS PHY allocated or %NULL if the allocation failed.
1460  */
1461 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1462 {
1463         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1464         struct sas_end_device *rdev;
1465
1466         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1467         if (!rdev) {
1468                 return NULL;
1469         }
1470
1471         device_initialize(&rdev->rphy.dev);
1472         rdev->rphy.dev.parent = get_device(&parent->dev);
1473         rdev->rphy.dev.release = sas_end_device_release;
1474         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1475                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1476                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1477                              shost->host_no, rphy->scsi_target_id,
1478                              parent->port_identifier);
1479         } else
1480                 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1481                              shost->host_no, parent->port_identifier);
1482         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1483         sas_rphy_initialize(&rdev->rphy);
1484         transport_setup_device(&rdev->rphy.dev);
1485
1486         return &rdev->rphy;
1487 }
1488 EXPORT_SYMBOL(sas_end_device_alloc);
1489
1490 /**
1491  * sas_expander_alloc - allocate an rphy for an end device
1492  * @parent: which port
1493  * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1494  *
1495  * Allocates an SAS remote PHY structure, connected to @parent.
1496  *
1497  * Returns:
1498  *      SAS PHY allocated or %NULL if the allocation failed.
1499  */
1500 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1501                                     enum sas_device_type type)
1502 {
1503         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1504         struct sas_expander_device *rdev;
1505         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1506
1507         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1508                type != SAS_FANOUT_EXPANDER_DEVICE);
1509
1510         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1511         if (!rdev) {
1512                 return NULL;
1513         }
1514
1515         device_initialize(&rdev->rphy.dev);
1516         rdev->rphy.dev.parent = get_device(&parent->dev);
1517         rdev->rphy.dev.release = sas_expander_release;
1518         mutex_lock(&sas_host->lock);
1519         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1520         mutex_unlock(&sas_host->lock);
1521         dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1522                      shost->host_no, rdev->rphy.scsi_target_id);
1523         rdev->rphy.identify.device_type = type;
1524         sas_rphy_initialize(&rdev->rphy);
1525         transport_setup_device(&rdev->rphy.dev);
1526
1527         return &rdev->rphy;
1528 }
1529 EXPORT_SYMBOL(sas_expander_alloc);
1530
1531 /**
1532  * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1533  * @rphy:       The remote PHY to be added
1534  *
1535  * Publishes a SAS remote PHY to the rest of the system.
1536  */
1537 int sas_rphy_add(struct sas_rphy *rphy)
1538 {
1539         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1540         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1541         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1542         struct sas_identify *identify = &rphy->identify;
1543         int error;
1544
1545         if (parent->rphy)
1546                 return -ENXIO;
1547         parent->rphy = rphy;
1548
1549         error = device_add(&rphy->dev);
1550         if (error)
1551                 return error;
1552         transport_add_device(&rphy->dev);
1553         transport_configure_device(&rphy->dev);
1554         if (sas_bsg_initialize(shost, rphy))
1555                 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1556
1557
1558         mutex_lock(&sas_host->lock);
1559         list_add_tail(&rphy->list, &sas_host->rphy_list);
1560         if (identify->device_type == SAS_END_DEVICE &&
1561             (identify->target_port_protocols &
1562              (SAS_PROTOCOL_SSP | SAS_PROTOCOL_STP | SAS_PROTOCOL_SATA)))
1563                 rphy->scsi_target_id = sas_host->next_target_id++;
1564         else if (identify->device_type == SAS_END_DEVICE)
1565                 rphy->scsi_target_id = -1;
1566         mutex_unlock(&sas_host->lock);
1567
1568         if (identify->device_type == SAS_END_DEVICE &&
1569             rphy->scsi_target_id != -1) {
1570                 int lun;
1571
1572                 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1573                         lun = SCAN_WILD_CARD;
1574                 else
1575                         lun = 0;
1576
1577                 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1578                                  SCSI_SCAN_INITIAL);
1579         }
1580
1581         return 0;
1582 }
1583 EXPORT_SYMBOL(sas_rphy_add);
1584
1585 /**
1586  * sas_rphy_free  -  free a SAS remote PHY
1587  * @rphy: SAS remote PHY to free
1588  *
1589  * Frees the specified SAS remote PHY.
1590  *
1591  * Note:
1592  *   This function must only be called on a remote
1593  *   PHY that has not successfully been added using
1594  *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1595  */
1596 void sas_rphy_free(struct sas_rphy *rphy)
1597 {
1598         struct device *dev = &rphy->dev;
1599         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1600         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1601
1602         mutex_lock(&sas_host->lock);
1603         list_del(&rphy->list);
1604         mutex_unlock(&sas_host->lock);
1605
1606         transport_destroy_device(dev);
1607
1608         put_device(dev);
1609 }
1610 EXPORT_SYMBOL(sas_rphy_free);
1611
1612 /**
1613  * sas_rphy_delete  -  remove and free SAS remote PHY
1614  * @rphy:       SAS remote PHY to remove and free
1615  *
1616  * Removes the specified SAS remote PHY and frees it.
1617  */
1618 void
1619 sas_rphy_delete(struct sas_rphy *rphy)
1620 {
1621         sas_rphy_remove(rphy);
1622         sas_rphy_free(rphy);
1623 }
1624 EXPORT_SYMBOL(sas_rphy_delete);
1625
1626 /**
1627  * sas_rphy_unlink  -  unlink SAS remote PHY
1628  * @rphy:       SAS remote phy to unlink from its parent port
1629  *
1630  * Removes port reference to an rphy
1631  */
1632 void sas_rphy_unlink(struct sas_rphy *rphy)
1633 {
1634         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1635
1636         parent->rphy = NULL;
1637 }
1638 EXPORT_SYMBOL(sas_rphy_unlink);
1639
1640 /**
1641  * sas_rphy_remove  -  remove SAS remote PHY
1642  * @rphy:       SAS remote phy to remove
1643  *
1644  * Removes the specified SAS remote PHY.
1645  */
1646 void
1647 sas_rphy_remove(struct sas_rphy *rphy)
1648 {
1649         struct device *dev = &rphy->dev;
1650
1651         switch (rphy->identify.device_type) {
1652         case SAS_END_DEVICE:
1653                 scsi_remove_target(dev);
1654                 break;
1655         case SAS_EDGE_EXPANDER_DEVICE:
1656         case SAS_FANOUT_EXPANDER_DEVICE:
1657                 sas_remove_children(dev);
1658                 break;
1659         default:
1660                 break;
1661         }
1662
1663         sas_rphy_unlink(rphy);
1664         bsg_remove_queue(rphy->q);
1665         transport_remove_device(dev);
1666         device_del(dev);
1667 }
1668 EXPORT_SYMBOL(sas_rphy_remove);
1669
1670 /**
1671  * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1672  * @dev:        device to check
1673  *
1674  * Returns:
1675  *      %1 if the device represents a SAS remote PHY, %0 else
1676  */
1677 int scsi_is_sas_rphy(const struct device *dev)
1678 {
1679         return dev->release == sas_end_device_release ||
1680                 dev->release == sas_expander_release;
1681 }
1682 EXPORT_SYMBOL(scsi_is_sas_rphy);
1683
1684
1685 /*
1686  * SCSI scan helper
1687  */
1688
1689 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1690                 uint id, u64 lun)
1691 {
1692         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1693         struct sas_rphy *rphy;
1694
1695         mutex_lock(&sas_host->lock);
1696         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1697                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1698                     rphy->scsi_target_id == -1)
1699                         continue;
1700
1701                 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1702                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1703                         scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1704                                          lun, SCSI_SCAN_MANUAL);
1705                 }
1706         }
1707         mutex_unlock(&sas_host->lock);
1708
1709         return 0;
1710 }
1711
1712
1713 /*
1714  * Setup / Teardown code
1715  */
1716
1717 #define SETUP_TEMPLATE(attrb, field, perm, test)                        \
1718         i->private_##attrb[count] = dev_attr_##field;           \
1719         i->private_##attrb[count].attr.mode = perm;                     \
1720         i->attrb[count] = &i->private_##attrb[count];                   \
1721         if (test)                                                       \
1722                 count++
1723
1724 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)   \
1725         i->private_##attrb[count] = dev_attr_##field;           \
1726         i->private_##attrb[count].attr.mode = perm;                     \
1727         if (ro_test) {                                                  \
1728                 i->private_##attrb[count].attr.mode = ro_perm;          \
1729                 i->private_##attrb[count].store = NULL;                 \
1730         }                                                               \
1731         i->attrb[count] = &i->private_##attrb[count];                   \
1732         if (test)                                                       \
1733                 count++
1734
1735 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1736         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1737
1738 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1739         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1740
1741 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1742         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1743
1744 #define SETUP_PHY_ATTRIBUTE_RW(field)                                   \
1745         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1746                         !i->f->set_phy_speed, S_IRUGO)
1747
1748 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)                    \
1749         SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,       \
1750                           !i->f->func, S_IRUGO)
1751
1752 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1753         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1754
1755 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1756         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1757
1758 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1759         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1760
1761 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1762         SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1763
1764 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1765         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1766
1767 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1768         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1769
1770 /**
1771  * sas_attach_transport  -  instantiate SAS transport template
1772  * @ft:         SAS transport class function template
1773  */
1774 struct scsi_transport_template *
1775 sas_attach_transport(struct sas_function_template *ft)
1776 {
1777         struct sas_internal *i;
1778         int count;
1779
1780         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1781         if (!i)
1782                 return NULL;
1783
1784         i->t.user_scan = sas_user_scan;
1785
1786         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1787         i->t.host_attrs.ac.class = &sas_host_class.class;
1788         i->t.host_attrs.ac.match = sas_host_match;
1789         transport_container_register(&i->t.host_attrs);
1790         i->t.host_size = sizeof(struct sas_host_attrs);
1791
1792         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1793         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1794         i->phy_attr_cont.ac.match = sas_phy_match;
1795         transport_container_register(&i->phy_attr_cont);
1796
1797         i->port_attr_cont.ac.class = &sas_port_class.class;
1798         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1799         i->port_attr_cont.ac.match = sas_port_match;
1800         transport_container_register(&i->port_attr_cont);
1801
1802         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1803         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1804         i->rphy_attr_cont.ac.match = sas_rphy_match;
1805         transport_container_register(&i->rphy_attr_cont);
1806
1807         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1808         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1809         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1810         transport_container_register(&i->end_dev_attr_cont);
1811
1812         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1813         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1814         i->expander_attr_cont.ac.match = sas_expander_match;
1815         transport_container_register(&i->expander_attr_cont);
1816
1817         i->f = ft;
1818
1819         count = 0;
1820         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1821         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1822         SETUP_PHY_ATTRIBUTE(device_type);
1823         SETUP_PHY_ATTRIBUTE(sas_address);
1824         SETUP_PHY_ATTRIBUTE(phy_identifier);
1825         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1826         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1827         SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1828         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1829         SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1830
1831         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1832         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1833         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1834         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1835         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1836         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1837         SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1838         i->phy_attrs[count] = NULL;
1839
1840         count = 0;
1841         SETUP_PORT_ATTRIBUTE(num_phys);
1842         i->port_attrs[count] = NULL;
1843
1844         count = 0;
1845         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1846         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1847         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1848         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1849         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1850         SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1851         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1852                                        get_enclosure_identifier);
1853         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1854                                        get_bay_identifier);
1855         i->rphy_attrs[count] = NULL;
1856
1857         count = 0;
1858         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1859         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1860         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1861         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1862         SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1863         i->end_dev_attrs[count] = NULL;
1864
1865         count = 0;
1866         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1867         SETUP_EXPANDER_ATTRIBUTE(product_id);
1868         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1869         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1870         SETUP_EXPANDER_ATTRIBUTE(component_id);
1871         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1872         SETUP_EXPANDER_ATTRIBUTE(level);
1873         i->expander_attrs[count] = NULL;
1874
1875         return &i->t;
1876 }
1877 EXPORT_SYMBOL(sas_attach_transport);
1878
1879 /**
1880  * sas_release_transport  -  release SAS transport template instance
1881  * @t:          transport template instance
1882  */
1883 void sas_release_transport(struct scsi_transport_template *t)
1884 {
1885         struct sas_internal *i = to_sas_internal(t);
1886
1887         transport_container_unregister(&i->t.host_attrs);
1888         transport_container_unregister(&i->phy_attr_cont);
1889         transport_container_unregister(&i->port_attr_cont);
1890         transport_container_unregister(&i->rphy_attr_cont);
1891         transport_container_unregister(&i->end_dev_attr_cont);
1892         transport_container_unregister(&i->expander_attr_cont);
1893
1894         kfree(i);
1895 }
1896 EXPORT_SYMBOL(sas_release_transport);
1897
1898 static __init int sas_transport_init(void)
1899 {
1900         int error;
1901
1902         error = transport_class_register(&sas_host_class);
1903         if (error)
1904                 goto out;
1905         error = transport_class_register(&sas_phy_class);
1906         if (error)
1907                 goto out_unregister_transport;
1908         error = transport_class_register(&sas_port_class);
1909         if (error)
1910                 goto out_unregister_phy;
1911         error = transport_class_register(&sas_rphy_class);
1912         if (error)
1913                 goto out_unregister_port;
1914         error = transport_class_register(&sas_end_dev_class);
1915         if (error)
1916                 goto out_unregister_rphy;
1917         error = transport_class_register(&sas_expander_class);
1918         if (error)
1919                 goto out_unregister_end_dev;
1920
1921         return 0;
1922
1923  out_unregister_end_dev:
1924         transport_class_unregister(&sas_end_dev_class);
1925  out_unregister_rphy:
1926         transport_class_unregister(&sas_rphy_class);
1927  out_unregister_port:
1928         transport_class_unregister(&sas_port_class);
1929  out_unregister_phy:
1930         transport_class_unregister(&sas_phy_class);
1931  out_unregister_transport:
1932         transport_class_unregister(&sas_host_class);
1933  out:
1934         return error;
1935
1936 }
1937
1938 static void __exit sas_transport_exit(void)
1939 {
1940         transport_class_unregister(&sas_host_class);
1941         transport_class_unregister(&sas_phy_class);
1942         transport_class_unregister(&sas_port_class);
1943         transport_class_unregister(&sas_rphy_class);
1944         transport_class_unregister(&sas_end_dev_class);
1945         transport_class_unregister(&sas_expander_class);
1946 }
1947
1948 MODULE_AUTHOR("Christoph Hellwig");
1949 MODULE_DESCRIPTION("SAS Transport Attributes");
1950 MODULE_LICENSE("GPL");
1951
1952 module_init(sas_transport_init);
1953 module_exit(sas_transport_exit);