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