drivers/scsi/scsi_transport_sas.c

   1 /*
   2  * Copyright (C) 2005-2006 Dell Inc.
   3  *      Released under GPL v2.
   4  *
   5  * Serial Attached SCSI (SAS) transport class.
   6  *
   7  * The SAS transport class contains common code to deal with SAS HBAs,
   8  * an aproximated representation of SAS topologies in the driver model,
   9  * and various sysfs attributes to expose these topologies and managment
  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/err.h>
  29 #include <linux/slab.h>
  30 #include <linux/string.h>
  31
  32 #include <scsi/scsi.h>
  33 #include <scsi/scsi_device.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_transport.h>
  36 #include <scsi/scsi_transport_sas.h>
  37
  38 #include "scsi_sas_internal.h"
  39 struct sas_host_attrs {
  40         struct list_head rphy_list;
  41         struct mutex lock;
  42         u32 next_target_id;
  43         u32 next_expander_id;
  44 };
  45 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
  46
  47
  48 /*
  49  * Hack to allow attributes of the same name in different objects.
  50  */
  51 #define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  52         struct class_device_attribute class_device_attr_##_prefix##_##_name = \
  53         __ATTR(_name,_mode,_show,_store)
  54
  55
  56 /*
  57  * Pretty printing helpers
  58  */
  59
  60 #define sas_bitfield_name_match(title, table)                   \
  61 static ssize_t                                                  \
  62 get_sas_##title##_names(u32 table_key, char *buf)               \
  63 {                                                               \
  64         char *prefix = "";                                      \
  65         ssize_t len = 0;                                        \
  66         int i;                                                  \
  67                                                                 \
  68         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  69                 if (table[i].value & table_key) {               \
  70                         len += sprintf(buf + len, "%s%s",       \
  71                                 prefix, table[i].name);         \
  72                         prefix = ", ";                          \
  73                 }                                               \
  74         }                                                       \
  75         len += sprintf(buf + len, "\n");                        \
  76         return len;                                             \
  77 }
  78
  79 #define sas_bitfield_name_search(title, table)                  \
  80 static ssize_t                                                  \
  81 get_sas_##title##_names(u32 table_key, char *buf)               \
  82 {                                                               \
  83         ssize_t len = 0;                                        \
  84         int i;                                                  \
  85                                                                 \
  86         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
  87                 if (table[i].value == table_key) {              \
  88                         len += sprintf(buf + len, "%s",         \
  89                                 table[i].name);                 \
  90                         break;                                  \
  91                 }                                               \
  92         }                                                       \
  93         len += sprintf(buf + len, "\n");                        \
  94         return len;                                             \
  95 }
  96
  97 static struct {
  98         u32             value;
  99         char            *name;
 100 } sas_device_type_names[] = {
 101         { SAS_PHY_UNUSED,               "unused" },
 102         { SAS_END_DEVICE,               "end device" },
 103         { SAS_EDGE_EXPANDER_DEVICE,     "edge expander" },
 104         { SAS_FANOUT_EXPANDER_DEVICE,   "fanout expander" },
 105 };
 106 sas_bitfield_name_search(device_type, sas_device_type_names)
 107
 108
 109 static struct {
 110         u32             value;
 111         char            *name;
 112 } sas_protocol_names[] = {
 113         { SAS_PROTOCOL_SATA,            "sata" },
 114         { SAS_PROTOCOL_SMP,             "smp" },
 115         { SAS_PROTOCOL_STP,             "stp" },
 116         { SAS_PROTOCOL_SSP,             "ssp" },
 117 };
 118 sas_bitfield_name_match(protocol, sas_protocol_names)
 119
 120 static struct {
 121         u32             value;
 122         char            *name;
 123 } sas_linkspeed_names[] = {
 124         { SAS_LINK_RATE_UNKNOWN,        "Unknown" },
 125         { SAS_PHY_DISABLED,             "Phy disabled" },
 126         { SAS_LINK_RATE_FAILED,         "Link Rate failed" },
 127         { SAS_SATA_SPINUP_HOLD,         "Spin-up hold" },
 128         { SAS_LINK_RATE_1_5_GBPS,       "1.5 Gbit" },
 129         { SAS_LINK_RATE_3_0_GBPS,       "3.0 Gbit" },
 130         { SAS_LINK_RATE_6_0_GBPS,       "6.0 Gbit" },
 131 };
 132 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 133
 134
 135 /*
 136  * SAS host attributes
 137  */
 138
 139 static int sas_host_setup(struct transport_container *tc, struct device *dev,
 140                           struct class_device *cdev)
 141 {
 142         struct Scsi_Host *shost = dev_to_shost(dev);
 143         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 144
 145         INIT_LIST_HEAD(&sas_host->rphy_list);
 146         mutex_init(&sas_host->lock);
 147         sas_host->next_target_id = 0;
 148         sas_host->next_expander_id = 0;
 149         return 0;
 150 }
 151
 152 static DECLARE_TRANSPORT_CLASS(sas_host_class,
 153                 "sas_host", sas_host_setup, NULL, NULL);
 154
 155 static int sas_host_match(struct attribute_container *cont,
 156                             struct device *dev)
 157 {
 158         struct Scsi_Host *shost;
 159         struct sas_internal *i;
 160
 161         if (!scsi_is_host_device(dev))
 162                 return 0;
 163         shost = dev_to_shost(dev);
 164
 165         if (!shost->transportt)
 166                 return 0;
 167         if (shost->transportt->host_attrs.ac.class !=
 168                         &sas_host_class.class)
 169                 return 0;
 170
 171         i = to_sas_internal(shost->transportt);
 172         return &i->t.host_attrs.ac == cont;
 173 }
 174
 175 static int do_sas_phy_delete(struct device *dev, void *data)
 176 {
 177         int pass = (int)(unsigned long)data;
 178
 179         if (pass == 0 && scsi_is_sas_port(dev))
 180                 sas_port_delete(dev_to_sas_port(dev));
 181         else if (pass == 1 && scsi_is_sas_phy(dev))
 182                 sas_phy_delete(dev_to_phy(dev));
 183         return 0;
 184 }
 185
 186 /**
 187  * sas_remove_children  --  tear down a devices SAS data structures
 188  * @dev:        device belonging to the sas object
 189  *
 190  * Removes all SAS PHYs and remote PHYs for a given object
 191  */
 192 void sas_remove_children(struct device *dev)
 193 {
 194         device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 195         device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 196 }
 197 EXPORT_SYMBOL(sas_remove_children);
 198
 199 /**
 200  * sas_remove_host  --  tear down a Scsi_Host's SAS data structures
 201  * @shost:      Scsi Host that is torn down
 202  *
 203  * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
 204  * Must be called just before scsi_remove_host for SAS HBAs.
 205  */
 206 void sas_remove_host(struct Scsi_Host *shost)
 207 {
 208         sas_remove_children(&shost->shost_gendev);
 209 }
 210 EXPORT_SYMBOL(sas_remove_host);
 211
 212
 213 /*
 214  * SAS Phy attributes
 215  */
 216
 217 #define sas_phy_show_simple(field, name, format_string, cast)           \
 218 static ssize_t                                                          \
 219 show_sas_phy_##name(struct class_device *cdev, char *buf)               \
 220 {                                                                       \
 221         struct sas_phy *phy = transport_class_to_phy(cdev);             \
 222                                                                         \
 223         return snprintf(buf, 20, format_string, cast phy->field);       \
 224 }
 225
 226 #define sas_phy_simple_attr(field, name, format_string, type)           \
 227         sas_phy_show_simple(field, name, format_string, (type)) \
 228 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 229
 230 #define sas_phy_show_protocol(field, name)                              \
 231 static ssize_t                                                          \
 232 show_sas_phy_##name(struct class_device *cdev, char *buf)               \
 233 {                                                                       \
 234         struct sas_phy *phy = transport_class_to_phy(cdev);             \
 235                                                                         \
 236         if (!phy->field)                                                \
 237                 return snprintf(buf, 20, "none\n");                     \
 238         return get_sas_protocol_names(phy->field, buf);         \
 239 }
 240
 241 #define sas_phy_protocol_attr(field, name)                              \
 242         sas_phy_show_protocol(field, name)                              \
 243 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 244
 245 #define sas_phy_show_linkspeed(field)                                   \
 246 static ssize_t                                                          \
 247 show_sas_phy_##field(struct class_device *cdev, char *buf)              \
 248 {                                                                       \
 249         struct sas_phy *phy = transport_class_to_phy(cdev);             \
 250                                                                         \
 251         return get_sas_linkspeed_names(phy->field, buf);                \
 252 }
 253
 254 #define sas_phy_linkspeed_attr(field)                                   \
 255         sas_phy_show_linkspeed(field)                                   \
 256 static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 257
 258 #define sas_phy_show_linkerror(field)                                   \
 259 static ssize_t                                                          \
 260 show_sas_phy_##field(struct class_device *cdev, char *buf)              \
 261 {                                                                       \
 262         struct sas_phy *phy = transport_class_to_phy(cdev);             \
 263         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);        \
 264         struct sas_internal *i = to_sas_internal(shost->transportt);    \
 265         int error;                                                      \
 266                                                                         \
 267         if (!phy->local_attached)                                       \
 268                 return -EINVAL;                                         \
 269                                                                         \
 270         error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;   \
 271         if (error)                                                      \
 272                 return error;                                           \
 273         return snprintf(buf, 20, "%u\n", phy->field);                   \
 274 }
 275
 276 #define sas_phy_linkerror_attr(field)                                   \
 277         sas_phy_show_linkerror(field)                                   \
 278 static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 279
 280
 281 static ssize_t
 282 show_sas_device_type(struct class_device *cdev, char *buf)
 283 {
 284         struct sas_phy *phy = transport_class_to_phy(cdev);
 285
 286         if (!phy->identify.device_type)
 287                 return snprintf(buf, 20, "none\n");
 288         return get_sas_device_type_names(phy->identify.device_type, buf);
 289 }
 290 static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 291
 292 static ssize_t do_sas_phy_reset(struct class_device *cdev,
 293                 size_t count, int hard_reset)
 294 {
 295         struct sas_phy *phy = transport_class_to_phy(cdev);
 296         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 297         struct sas_internal *i = to_sas_internal(shost->transportt);
 298         int error;
 299
 300         if (!phy->local_attached)
 301                 return -EINVAL;
 302
 303         error = i->f->phy_reset(phy, hard_reset);
 304         if (error)
 305                 return error;
 306         return count;
 307 };
 308
 309 static ssize_t store_sas_link_reset(struct class_device *cdev,
 310                 const char *buf, size_t count)
 311 {
 312         return do_sas_phy_reset(cdev, count, 0);
 313 }
 314 static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 315
 316 static ssize_t store_sas_hard_reset(struct class_device *cdev,
 317                 const char *buf, size_t count)
 318 {
 319         return do_sas_phy_reset(cdev, count, 1);
 320 }
 321 static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 322
 323 sas_phy_protocol_attr(identify.initiator_port_protocols,
 324                 initiator_port_protocols);
 325 sas_phy_protocol_attr(identify.target_port_protocols,
 326                 target_port_protocols);
 327 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 328                 unsigned long long);
 329 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 330 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);
 331 sas_phy_linkspeed_attr(negotiated_linkrate);
 332 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 333 sas_phy_linkspeed_attr(minimum_linkrate);
 334 sas_phy_linkspeed_attr(maximum_linkrate_hw);
 335 sas_phy_linkspeed_attr(maximum_linkrate);
 336 sas_phy_linkerror_attr(invalid_dword_count);
 337 sas_phy_linkerror_attr(running_disparity_error_count);
 338 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 339 sas_phy_linkerror_attr(phy_reset_problem_count);
 340
 341
 342 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 343                 "sas_phy", NULL, NULL, NULL);
 344
 345 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 346 {
 347         struct Scsi_Host *shost;
 348         struct sas_internal *i;
 349
 350         if (!scsi_is_sas_phy(dev))
 351                 return 0;
 352         shost = dev_to_shost(dev->parent);
 353
 354         if (!shost->transportt)
 355                 return 0;
 356         if (shost->transportt->host_attrs.ac.class !=
 357                         &sas_host_class.class)
 358                 return 0;
 359
 360         i = to_sas_internal(shost->transportt);
 361         return &i->phy_attr_cont.ac == cont;
 362 }
 363
 364 static void sas_phy_release(struct device *dev)
 365 {
 366         struct sas_phy *phy = dev_to_phy(dev);
 367
 368         put_device(dev->parent);
 369         kfree(phy);
 370 }
 371
 372 /**
 373  * sas_phy_alloc  --  allocates and initialize a SAS PHY structure
 374  * @parent:     Parent device
 375  * @number:     Phy index
 376  *
 377  * Allocates an SAS PHY structure.  It will be added in the device tree
 378  * below the device specified by @parent, which has to be either a Scsi_Host
 379  * or sas_rphy.
 380  *
 381  * Returns:
 382  *      SAS PHY allocated or %NULL if the allocation failed.
 383  */
 384 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 385 {
 386         struct Scsi_Host *shost = dev_to_shost(parent);
 387         struct sas_phy *phy;
 388
 389         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 390         if (!phy)
 391                 return NULL;
 392
 393         phy->number = number;
 394
 395         device_initialize(&phy->dev);
 396         phy->dev.parent = get_device(parent);
 397         phy->dev.release = sas_phy_release;
 398         INIT_LIST_HEAD(&phy->port_siblings);
 399         if (scsi_is_sas_expander_device(parent)) {
 400                 struct sas_rphy *rphy = dev_to_rphy(parent);
 401                 sprintf(phy->dev.bus_id, "phy-%d:%d:%d", shost->host_no,
 402                         rphy->scsi_target_id, number);
 403         } else
 404                 sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
 405
 406         transport_setup_device(&phy->dev);
 407
 408         return phy;
 409 }
 410 EXPORT_SYMBOL(sas_phy_alloc);
 411
 412 /**
 413  * sas_phy_add  --  add a SAS PHY to the device hierachy
 414  * @phy:        The PHY to be added
 415  *
 416  * Publishes a SAS PHY to the rest of the system.
 417  */
 418 int sas_phy_add(struct sas_phy *phy)
 419 {
 420         int error;
 421
 422         error = device_add(&phy->dev);
 423         if (!error) {
 424                 transport_add_device(&phy->dev);
 425                 transport_configure_device(&phy->dev);
 426         }
 427
 428         return error;
 429 }
 430 EXPORT_SYMBOL(sas_phy_add);
 431
 432 /**
 433  * sas_phy_free  --  free a SAS PHY
 434  * @phy:        SAS PHY to free
 435  *
 436  * Frees the specified SAS PHY.
 437  *
 438  * Note:
 439  *   This function must only be called on a PHY that has not
 440  *   sucessfully been added using sas_phy_add().
 441  */
 442 void sas_phy_free(struct sas_phy *phy)
 443 {
 444         transport_destroy_device(&phy->dev);
 445         put_device(&phy->dev);
 446 }
 447 EXPORT_SYMBOL(sas_phy_free);
 448
 449 /**
 450  * sas_phy_delete  --  remove SAS PHY
 451  * @phy:        SAS PHY to remove
 452  *
 453  * Removes the specified SAS PHY.  If the SAS PHY has an
 454  * associated remote PHY it is removed before.
 455  */
 456 void
 457 sas_phy_delete(struct sas_phy *phy)
 458 {
 459         struct device *dev = &phy->dev;
 460
 461         /* this happens if the phy is still part of a port when deleted */
 462         BUG_ON(!list_empty(&phy->port_siblings));
 463
 464         transport_remove_device(dev);
 465         device_del(dev);
 466         transport_destroy_device(dev);
 467         put_device(dev);
 468 }
 469 EXPORT_SYMBOL(sas_phy_delete);
 470
 471 /**
 472  * scsi_is_sas_phy  --  check if a struct device represents a SAS PHY
 473  * @dev:        device to check
 474  *
 475  * Returns:
 476  *      %1 if the device represents a SAS PHY, %0 else
 477  */
 478 int scsi_is_sas_phy(const struct device *dev)
 479 {
 480         return dev->release == sas_phy_release;
 481 }
 482 EXPORT_SYMBOL(scsi_is_sas_phy);
 483
 484 /*
 485  * SAS Port attributes
 486  */
 487 #define sas_port_show_simple(field, name, format_string, cast)          \
 488 static ssize_t                                                          \
 489 show_sas_port_##name(struct class_device *cdev, char *buf)              \
 490 {                                                                       \
 491         struct sas_port *port = transport_class_to_sas_port(cdev);      \
 492                                                                         \
 493         return snprintf(buf, 20, format_string, cast port->field);      \
 494 }
 495
 496 #define sas_port_simple_attr(field, name, format_string, type)          \
 497         sas_port_show_simple(field, name, format_string, (type))        \
 498 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 499
 500 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 501
 502 static DECLARE_TRANSPORT_CLASS(sas_port_class,
 503                                "sas_port", NULL, NULL, NULL);
 504
 505 static int sas_port_match(struct attribute_container *cont, struct device *dev)
 506 {
 507         struct Scsi_Host *shost;
 508         struct sas_internal *i;
 509
 510         if (!scsi_is_sas_port(dev))
 511                 return 0;
 512         shost = dev_to_shost(dev->parent);
 513
 514         if (!shost->transportt)
 515                 return 0;
 516         if (shost->transportt->host_attrs.ac.class !=
 517                         &sas_host_class.class)
 518                 return 0;
 519
 520         i = to_sas_internal(shost->transportt);
 521         return &i->port_attr_cont.ac == cont;
 522 }
 523
 524
 525 static void sas_port_release(struct device *dev)
 526 {
 527         struct sas_port *port = dev_to_sas_port(dev);
 528
 529         BUG_ON(!list_empty(&port->phy_list));
 530
 531         put_device(dev->parent);
 532         kfree(port);
 533 }
 534
 535 static void sas_port_create_link(struct sas_port *port,
 536                                  struct sas_phy *phy)
 537 {
 538         sysfs_create_link(&port->dev.kobj, &phy->dev.kobj, phy->dev.bus_id);
 539         sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 540 }
 541
 542 static void sas_port_delete_link(struct sas_port *port,
 543                                  struct sas_phy *phy)
 544 {
 545         sysfs_remove_link(&port->dev.kobj, phy->dev.bus_id);
 546         sysfs_remove_link(&phy->dev.kobj, "port");
 547 }
 548
 549 /** sas_port_alloc - allocate and initialize a SAS port structure
 550  *
 551  * @parent:     parent device
 552  * @port_id:    port number
 553  *
 554  * Allocates a SAS port structure.  It will be added to the device tree
 555  * below the device specified by @parent which must be either a Scsi_Host
 556  * or a sas_expander_device.
 557  *
 558  * Returns %NULL on error
 559  */
 560 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 561 {
 562         struct Scsi_Host *shost = dev_to_shost(parent);
 563         struct sas_port *port;
 564
 565         port = kzalloc(sizeof(*port), GFP_KERNEL);
 566         if (!port)
 567                 return NULL;
 568
 569         port->port_identifier = port_id;
 570
 571         device_initialize(&port->dev);
 572
 573         port->dev.parent = get_device(parent);
 574         port->dev.release = sas_port_release;
 575
 576         mutex_init(&port->phy_list_mutex);
 577         INIT_LIST_HEAD(&port->phy_list);
 578
 579         if (scsi_is_sas_expander_device(parent)) {
 580                 struct sas_rphy *rphy = dev_to_rphy(parent);
 581                 sprintf(port->dev.bus_id, "port-%d:%d:%d", shost->host_no,
 582                         rphy->scsi_target_id, port->port_identifier);
 583         } else
 584                 sprintf(port->dev.bus_id, "port-%d:%d", shost->host_no,
 585                         port->port_identifier);
 586
 587         transport_setup_device(&port->dev);
 588
 589         return port;
 590 }
 591 EXPORT_SYMBOL(sas_port_alloc);
 592
 593 /**
 594  * sas_port_add - add a SAS port to the device hierarchy
 595  *
 596  * @port:       port to be added
 597  *
 598  * publishes a port to the rest of the system
 599  */
 600 int sas_port_add(struct sas_port *port)
 601 {
 602         int error;
 603
 604         /* No phys should be added until this is made visible */
 605         BUG_ON(!list_empty(&port->phy_list));
 606
 607         error = device_add(&port->dev);
 608
 609         if (error)
 610                 return error;
 611
 612         transport_add_device(&port->dev);
 613         transport_configure_device(&port->dev);
 614
 615         return 0;
 616 }
 617 EXPORT_SYMBOL(sas_port_add);
 618
 619 /**
 620  * sas_port_free  --  free a SAS PORT
 621  * @port:       SAS PORT to free
 622  *
 623  * Frees the specified SAS PORT.
 624  *
 625  * Note:
 626  *   This function must only be called on a PORT that has not
 627  *   sucessfully been added using sas_port_add().
 628  */
 629 void sas_port_free(struct sas_port *port)
 630 {
 631         transport_destroy_device(&port->dev);
 632         put_device(&port->dev);
 633 }
 634 EXPORT_SYMBOL(sas_port_free);
 635
 636 /**
 637  * sas_port_delete  --  remove SAS PORT
 638  * @port:       SAS PORT to remove
 639  *
 640  * Removes the specified SAS PORT.  If the SAS PORT has an
 641  * associated phys, unlink them from the port as well.
 642  */
 643 void sas_port_delete(struct sas_port *port)
 644 {
 645         struct device *dev = &port->dev;
 646         struct sas_phy *phy, *tmp_phy;
 647
 648         if (port->rphy) {
 649                 sas_rphy_delete(port->rphy);
 650                 port->rphy = NULL;
 651         }
 652
 653         mutex_lock(&port->phy_list_mutex);
 654         list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
 655                                  port_siblings) {
 656                 sas_port_delete_link(port, phy);
 657                 list_del_init(&phy->port_siblings);
 658         }
 659         mutex_unlock(&port->phy_list_mutex);
 660
 661         transport_remove_device(dev);
 662         device_del(dev);
 663         transport_destroy_device(dev);
 664         put_device(dev);
 665 }
 666 EXPORT_SYMBOL(sas_port_delete);
 667
 668 /**
 669  * scsi_is_sas_port --  check if a struct device represents a SAS port
 670  * @dev:        device to check
 671  *
 672  * Returns:
 673  *      %1 if the device represents a SAS Port, %0 else
 674  */
 675 int scsi_is_sas_port(const struct device *dev)
 676 {
 677         return dev->release == sas_port_release;
 678 }
 679 EXPORT_SYMBOL(scsi_is_sas_port);
 680
 681 /**
 682  * sas_port_add_phy - add another phy to a port to form a wide port
 683  * @port:       port to add the phy to
 684  * @phy:        phy to add
 685  *
 686  * When a port is initially created, it is empty (has no phys).  All
 687  * ports must have at least one phy to operated, and all wide ports
 688  * must have at least two.  The current code makes no difference
 689  * between ports and wide ports, but the only object that can be
 690  * connected to a remote device is a port, so ports must be formed on
 691  * all devices with phys if they're connected to anything.
 692  */
 693 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
 694 {
 695         mutex_lock(&port->phy_list_mutex);
 696         if (unlikely(!list_empty(&phy->port_siblings))) {
 697                 /* make sure we're already on this port */
 698                 struct sas_phy *tmp;
 699
 700                 list_for_each_entry(tmp, &port->phy_list, port_siblings)
 701                         if (tmp == phy)
 702                                 break;
 703                 /* If this trips, you added a phy that was already
 704                  * part of a different port */
 705                 if (unlikely(tmp != phy)) {
 706                         dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n", phy->dev.bus_id);
 707                         BUG();
 708                 }
 709         } else {
 710                 sas_port_create_link(port, phy);
 711                 list_add_tail(&phy->port_siblings, &port->phy_list);
 712                 port->num_phys++;
 713         }
 714         mutex_unlock(&port->phy_list_mutex);
 715 }
 716 EXPORT_SYMBOL(sas_port_add_phy);
 717
 718 /**
 719  * sas_port_delete_phy - remove a phy from a port or wide port
 720  * @port:       port to remove the phy from
 721  * @phy:        phy to remove
 722  *
 723  * This operation is used for tearing down ports again.  It must be
 724  * done to every port or wide port before calling sas_port_delete.
 725  */
 726 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
 727 {
 728         mutex_lock(&port->phy_list_mutex);
 729         sas_port_delete_link(port, phy);
 730         list_del_init(&phy->port_siblings);
 731         port->num_phys--;
 732         mutex_unlock(&port->phy_list_mutex);
 733 }
 734 EXPORT_SYMBOL(sas_port_delete_phy);
 735
 736 /*
 737  * SAS remote PHY attributes.
 738  */
 739
 740 #define sas_rphy_show_simple(field, name, format_string, cast)          \
 741 static ssize_t                                                          \
 742 show_sas_rphy_##name(struct class_device *cdev, char *buf)              \
 743 {                                                                       \
 744         struct sas_rphy *rphy = transport_class_to_rphy(cdev);  \
 745                                                                         \
 746         return snprintf(buf, 20, format_string, cast rphy->field);      \
 747 }
 748
 749 #define sas_rphy_simple_attr(field, name, format_string, type)          \
 750         sas_rphy_show_simple(field, name, format_string, (type))        \
 751 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO,                       \
 752                 show_sas_rphy_##name, NULL)
 753
 754 #define sas_rphy_show_protocol(field, name)                             \
 755 static ssize_t                                                          \
 756 show_sas_rphy_##name(struct class_device *cdev, char *buf)              \
 757 {                                                                       \
 758         struct sas_rphy *rphy = transport_class_to_rphy(cdev);  \
 759                                                                         \
 760         if (!rphy->field)                                       \
 761                 return snprintf(buf, 20, "none\n");                     \
 762         return get_sas_protocol_names(rphy->field, buf);        \
 763 }
 764
 765 #define sas_rphy_protocol_attr(field, name)                             \
 766         sas_rphy_show_protocol(field, name)                             \
 767 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO,                       \
 768                 show_sas_rphy_##name, NULL)
 769
 770 static ssize_t
 771 show_sas_rphy_device_type(struct class_device *cdev, char *buf)
 772 {
 773         struct sas_rphy *rphy = transport_class_to_rphy(cdev);
 774
 775         if (!rphy->identify.device_type)
 776                 return snprintf(buf, 20, "none\n");
 777         return get_sas_device_type_names(
 778                         rphy->identify.device_type, buf);
 779 }
 780
 781 static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
 782                 show_sas_rphy_device_type, NULL);
 783
 784 static ssize_t
 785 show_sas_rphy_enclosure_identifier(struct class_device *cdev, char *buf)
 786 {
 787         struct sas_rphy *rphy = transport_class_to_rphy(cdev);
 788         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
 789         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 790         struct sas_internal *i = to_sas_internal(shost->transportt);
 791         u64 identifier;
 792         int error;
 793
 794         /*
 795          * Only devices behind an expander are supported, because the
 796          * enclosure identifier is a SMP feature.
 797          */
 798         if (phy->local_attached)
 799                 return -EINVAL;
 800
 801         error = i->f->get_enclosure_identifier(rphy, &identifier);
 802         if (error)
 803                 return error;
 804         return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
 805 }
 806
 807 static SAS_CLASS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
 808                 show_sas_rphy_enclosure_identifier, NULL);
 809
 810 static ssize_t
 811 show_sas_rphy_bay_identifier(struct class_device *cdev, char *buf)
 812 {
 813         struct sas_rphy *rphy = transport_class_to_rphy(cdev);
 814         struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
 815         struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 816         struct sas_internal *i = to_sas_internal(shost->transportt);
 817         int val;
 818
 819         if (phy->local_attached)
 820                 return -EINVAL;
 821
 822         val = i->f->get_bay_identifier(rphy);
 823         if (val < 0)
 824                 return val;
 825         return sprintf(buf, "%d\n", val);
 826 }
 827
 828 static SAS_CLASS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
 829                 show_sas_rphy_bay_identifier, NULL);
 830
 831 sas_rphy_protocol_attr(identify.initiator_port_protocols,
 832                 initiator_port_protocols);
 833 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
 834 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 835                 unsigned long long);
 836 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 837
 838 /* only need 8 bytes of data plus header (4 or 8) */
 839 #define BUF_SIZE 64
 840
 841 int sas_read_port_mode_page(struct scsi_device *sdev)
 842 {
 843         char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
 844         struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 845         struct sas_end_device *rdev;
 846         struct scsi_mode_data mode_data;
 847         int res, error;
 848
 849         BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 850
 851         rdev = rphy_to_end_device(rphy);
 852
 853         if (!buffer)
 854                 return -ENOMEM;
 855
 856         res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
 857                               &mode_data, NULL);
 858
 859         error = -EINVAL;
 860         if (!scsi_status_is_good(res))
 861                 goto out;
 862
 863         msdata = buffer +  mode_data.header_length +
 864                 mode_data.block_descriptor_length;
 865
 866         if (msdata - buffer > BUF_SIZE - 8)
 867                 goto out;
 868
 869         error = 0;
 870
 871         rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
 872         rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
 873         rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
 874
 875  out:
 876         kfree(buffer);
 877         return error;
 878 }
 879 EXPORT_SYMBOL(sas_read_port_mode_page);
 880
 881 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
 882                                "sas_end_device", NULL, NULL, NULL);
 883
 884 #define sas_end_dev_show_simple(field, name, format_string, cast)       \
 885 static ssize_t                                                          \
 886 show_sas_end_dev_##name(struct class_device *cdev, char *buf)           \
 887 {                                                                       \
 888         struct sas_rphy *rphy = transport_class_to_rphy(cdev);          \
 889         struct sas_end_device *rdev = rphy_to_end_device(rphy);         \
 890                                                                         \
 891         return snprintf(buf, 20, format_string, cast rdev->field);      \
 892 }
 893
 894 #define sas_end_dev_simple_attr(field, name, format_string, type)       \
 895         sas_end_dev_show_simple(field, name, format_string, (type))     \
 896 static SAS_CLASS_DEVICE_ATTR(end_dev, name, S_IRUGO,                    \
 897                 show_sas_end_dev_##name, NULL)
 898
 899 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
 900 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
 901                         "%d\n", int);
 902 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
 903                         "%d\n", int);
 904
 905 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
 906                                "sas_expander", NULL, NULL, NULL);
 907
 908 #define sas_expander_show_simple(field, name, format_string, cast)      \
 909 static ssize_t                                                          \
 910 show_sas_expander_##name(struct class_device *cdev, char *buf)          \
 911 {                                                                       \
 912         struct sas_rphy *rphy = transport_class_to_rphy(cdev);          \
 913         struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
 914                                                                         \
 915         return snprintf(buf, 20, format_string, cast edev->field);      \
 916 }
 917
 918 #define sas_expander_simple_attr(field, name, format_string, type)      \
 919         sas_expander_show_simple(field, name, format_string, (type))    \
 920 static SAS_CLASS_DEVICE_ATTR(expander, name, S_IRUGO,                   \
 921                 show_sas_expander_##name, NULL)
 922
 923 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
 924 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
 925 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
 926 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
 927                          "%s\n", char *);
 928 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
 929 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
 930                          unsigned int);
 931 sas_expander_simple_attr(level, level, "%d\n", int);
 932
 933 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
 934                 "sas_device", NULL, NULL, NULL);
 935
 936 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
 937 {
 938         struct Scsi_Host *shost;
 939         struct sas_internal *i;
 940
 941         if (!scsi_is_sas_rphy(dev))
 942                 return 0;
 943         shost = dev_to_shost(dev->parent->parent);
 944
 945         if (!shost->transportt)
 946                 return 0;
 947         if (shost->transportt->host_attrs.ac.class !=
 948                         &sas_host_class.class)
 949                 return 0;
 950
 951         i = to_sas_internal(shost->transportt);
 952         return &i->rphy_attr_cont.ac == cont;
 953 }
 954
 955 static int sas_end_dev_match(struct attribute_container *cont,
 956                              struct device *dev)
 957 {
 958         struct Scsi_Host *shost;
 959         struct sas_internal *i;
 960         struct sas_rphy *rphy;
 961
 962         if (!scsi_is_sas_rphy(dev))
 963                 return 0;
 964         shost = dev_to_shost(dev->parent->parent);
 965         rphy = dev_to_rphy(dev);
 966
 967         if (!shost->transportt)
 968                 return 0;
 969         if (shost->transportt->host_attrs.ac.class !=
 970                         &sas_host_class.class)
 971                 return 0;
 972
 973         i = to_sas_internal(shost->transportt);
 974         return &i->end_dev_attr_cont.ac == cont &&
 975                 rphy->identify.device_type == SAS_END_DEVICE;
 976 }
 977
 978 static int sas_expander_match(struct attribute_container *cont,
 979                               struct device *dev)
 980 {
 981         struct Scsi_Host *shost;
 982         struct sas_internal *i;
 983         struct sas_rphy *rphy;
 984
 985         if (!scsi_is_sas_rphy(dev))
 986                 return 0;
 987         shost = dev_to_shost(dev->parent->parent);
 988         rphy = dev_to_rphy(dev);
 989
 990         if (!shost->transportt)
 991                 return 0;
 992         if (shost->transportt->host_attrs.ac.class !=
 993                         &sas_host_class.class)
 994                 return 0;
 995
 996         i = to_sas_internal(shost->transportt);
 997         return &i->expander_attr_cont.ac == cont &&
 998                 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
 999                  rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1000 }
1001
1002 static void sas_expander_release(struct device *dev)
1003 {
1004         struct sas_rphy *rphy = dev_to_rphy(dev);
1005         struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1006
1007         put_device(dev->parent);
1008         kfree(edev);
1009 }
1010
1011 static void sas_end_device_release(struct device *dev)
1012 {
1013         struct sas_rphy *rphy = dev_to_rphy(dev);
1014         struct sas_end_device *edev = rphy_to_end_device(rphy);
1015
1016         put_device(dev->parent);
1017         kfree(edev);
1018 }
1019
1020 /**
1021  * sas_rphy_initialize - common rphy intialization
1022  * @rphy:       rphy to initialise
1023  *
1024  * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1025  * initialise the common rphy component of each.
1026  */
1027 static void sas_rphy_initialize(struct sas_rphy *rphy)
1028 {
1029         INIT_LIST_HEAD(&rphy->list);
1030 }
1031
1032 /**
1033  * sas_end_device_alloc - allocate an rphy for an end device
1034  *
1035  * Allocates an SAS remote PHY structure, connected to @parent.
1036  *
1037  * Returns:
1038  *      SAS PHY allocated or %NULL if the allocation failed.
1039  */
1040 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1041 {
1042         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1043         struct sas_end_device *rdev;
1044
1045         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1046         if (!rdev) {
1047                 return NULL;
1048         }
1049
1050         device_initialize(&rdev->rphy.dev);
1051         rdev->rphy.dev.parent = get_device(&parent->dev);
1052         rdev->rphy.dev.release = sas_end_device_release;
1053         if (scsi_is_sas_expander_device(parent->dev.parent)) {
1054                 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1055                 sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d:%d",
1056                         shost->host_no, rphy->scsi_target_id, parent->port_identifier);
1057         } else
1058                 sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d",
1059                         shost->host_no, parent->port_identifier);
1060         rdev->rphy.identify.device_type = SAS_END_DEVICE;
1061         sas_rphy_initialize(&rdev->rphy);
1062         transport_setup_device(&rdev->rphy.dev);
1063
1064         return &rdev->rphy;
1065 }
1066 EXPORT_SYMBOL(sas_end_device_alloc);
1067
1068 /**
1069  * sas_expander_alloc - allocate an rphy for an end device
1070  *
1071  * Allocates an SAS remote PHY structure, connected to @parent.
1072  *
1073  * Returns:
1074  *      SAS PHY allocated or %NULL if the allocation failed.
1075  */
1076 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1077                                     enum sas_device_type type)
1078 {
1079         struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1080         struct sas_expander_device *rdev;
1081         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1082
1083         BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1084                type != SAS_FANOUT_EXPANDER_DEVICE);
1085
1086         rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1087         if (!rdev) {
1088                 return NULL;
1089         }
1090
1091         device_initialize(&rdev->rphy.dev);
1092         rdev->rphy.dev.parent = get_device(&parent->dev);
1093         rdev->rphy.dev.release = sas_expander_release;
1094         mutex_lock(&sas_host->lock);
1095         rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1096         mutex_unlock(&sas_host->lock);
1097         sprintf(rdev->rphy.dev.bus_id, "expander-%d:%d",
1098                 shost->host_no, rdev->rphy.scsi_target_id);
1099         rdev->rphy.identify.device_type = type;
1100         sas_rphy_initialize(&rdev->rphy);
1101         transport_setup_device(&rdev->rphy.dev);
1102
1103         return &rdev->rphy;
1104 }
1105 EXPORT_SYMBOL(sas_expander_alloc);
1106
1107 /**
1108  * sas_rphy_add  --  add a SAS remote PHY to the device hierachy
1109  * @rphy:       The remote PHY to be added
1110  *
1111  * Publishes a SAS remote PHY to the rest of the system.
1112  */
1113 int sas_rphy_add(struct sas_rphy *rphy)
1114 {
1115         struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1116         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1117         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1118         struct sas_identify *identify = &rphy->identify;
1119         int error;
1120
1121         if (parent->rphy)
1122                 return -ENXIO;
1123         parent->rphy = rphy;
1124
1125         error = device_add(&rphy->dev);
1126         if (error)
1127                 return error;
1128         transport_add_device(&rphy->dev);
1129         transport_configure_device(&rphy->dev);
1130
1131         mutex_lock(&sas_host->lock);
1132         list_add_tail(&rphy->list, &sas_host->rphy_list);
1133         if (identify->device_type == SAS_END_DEVICE &&
1134             (identify->target_port_protocols &
1135              (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1136                 rphy->scsi_target_id = sas_host->next_target_id++;
1137         else if (identify->device_type == SAS_END_DEVICE)
1138                 rphy->scsi_target_id = -1;
1139         mutex_unlock(&sas_host->lock);
1140
1141         if (identify->device_type == SAS_END_DEVICE &&
1142             rphy->scsi_target_id != -1) {
1143                 scsi_scan_target(&rphy->dev, parent->port_identifier,
1144                                 rphy->scsi_target_id, ~0, 0);
1145         }
1146
1147         return 0;
1148 }
1149 EXPORT_SYMBOL(sas_rphy_add);
1150
1151 /**
1152  * sas_rphy_free  --  free a SAS remote PHY
1153  * @rphy        SAS remote PHY to free
1154  *
1155  * Frees the specified SAS remote PHY.
1156  *
1157  * Note:
1158  *   This function must only be called on a remote
1159  *   PHY that has not sucessfully been added using
1160  *   sas_rphy_add().
1161  */
1162 void sas_rphy_free(struct sas_rphy *rphy)
1163 {
1164         struct device *dev = &rphy->dev;
1165         struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1166         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1167
1168         mutex_lock(&sas_host->lock);
1169         list_del(&rphy->list);
1170         mutex_unlock(&sas_host->lock);
1171
1172         transport_destroy_device(dev);
1173
1174         put_device(dev);
1175 }
1176 EXPORT_SYMBOL(sas_rphy_free);
1177
1178 /**
1179  * sas_rphy_delete  --  remove SAS remote PHY
1180  * @rphy:       SAS remote PHY to remove
1181  *
1182  * Removes the specified SAS remote PHY.
1183  */
1184 void
1185 sas_rphy_delete(struct sas_rphy *rphy)
1186 {
1187         struct device *dev = &rphy->dev;
1188         struct sas_port *parent = dev_to_sas_port(dev->parent);
1189         struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1190         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1191
1192         switch (rphy->identify.device_type) {
1193         case SAS_END_DEVICE:
1194                 scsi_remove_target(dev);
1195                 break;
1196         case SAS_EDGE_EXPANDER_DEVICE:
1197         case SAS_FANOUT_EXPANDER_DEVICE:
1198                 sas_remove_children(dev);
1199                 break;
1200         default:
1201                 break;
1202         }
1203
1204         transport_remove_device(dev);
1205         device_del(dev);
1206         transport_destroy_device(dev);
1207
1208         mutex_lock(&sas_host->lock);
1209         list_del(&rphy->list);
1210         mutex_unlock(&sas_host->lock);
1211
1212         parent->rphy = NULL;
1213
1214         put_device(dev);
1215 }
1216 EXPORT_SYMBOL(sas_rphy_delete);
1217
1218 /**
1219  * scsi_is_sas_rphy  --  check if a struct device represents a SAS remote PHY
1220  * @dev:        device to check
1221  *
1222  * Returns:
1223  *      %1 if the device represents a SAS remote PHY, %0 else
1224  */
1225 int scsi_is_sas_rphy(const struct device *dev)
1226 {
1227         return dev->release == sas_end_device_release ||
1228                 dev->release == sas_expander_release;
1229 }
1230 EXPORT_SYMBOL(scsi_is_sas_rphy);
1231
1232
1233 /*
1234  * SCSI scan helper
1235  */
1236
1237 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1238                 uint id, uint lun)
1239 {
1240         struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1241         struct sas_rphy *rphy;
1242
1243         mutex_lock(&sas_host->lock);
1244         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1245                 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1246
1247                 if (rphy->identify.device_type != SAS_END_DEVICE ||
1248                     rphy->scsi_target_id == -1)
1249                         continue;
1250
1251                 if ((channel == SCAN_WILD_CARD || channel == parent->port_identifier) &&
1252                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1253                         scsi_scan_target(&rphy->dev, parent->port_identifier,
1254                                          rphy->scsi_target_id, lun, 1);
1255                 }
1256         }
1257         mutex_unlock(&sas_host->lock);
1258
1259         return 0;
1260 }
1261
1262
1263 /*
1264  * Setup / Teardown code
1265  */
1266
1267 #define SETUP_TEMPLATE(attrb, field, perm, test)                                \
1268         i->private_##attrb[count] = class_device_attr_##field;          \
1269         i->private_##attrb[count].attr.mode = perm;                     \
1270         i->attrb[count] = &i->private_##attrb[count];                   \
1271         if (test)                                                       \
1272                 count++
1273
1274
1275 #define SETUP_RPORT_ATTRIBUTE(field)                                    \
1276         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1277
1278 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)                     \
1279         SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1280
1281 #define SETUP_PHY_ATTRIBUTE(field)                                      \
1282         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1283
1284 #define SETUP_PORT_ATTRIBUTE(field)                                     \
1285         SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1286
1287 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)                       \
1288         SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1289
1290 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)                               \
1291         SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1)
1292
1293 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)                \
1294         SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func)
1295
1296 #define SETUP_END_DEV_ATTRIBUTE(field)                                  \
1297         SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1298
1299 #define SETUP_EXPANDER_ATTRIBUTE(field)                                 \
1300         SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1301
1302 /**
1303  * sas_attach_transport  --  instantiate SAS transport template
1304  * @ft:         SAS transport class function template
1305  */
1306 struct scsi_transport_template *
1307 sas_attach_transport(struct sas_function_template *ft)
1308 {
1309         struct sas_internal *i;
1310         int count;
1311
1312         i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1313         if (!i)
1314                 return NULL;
1315
1316         i->t.user_scan = sas_user_scan;
1317
1318         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1319         i->t.host_attrs.ac.class = &sas_host_class.class;
1320         i->t.host_attrs.ac.match = sas_host_match;
1321         transport_container_register(&i->t.host_attrs);
1322         i->t.host_size = sizeof(struct sas_host_attrs);
1323
1324         i->phy_attr_cont.ac.class = &sas_phy_class.class;
1325         i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1326         i->phy_attr_cont.ac.match = sas_phy_match;
1327         transport_container_register(&i->phy_attr_cont);
1328
1329         i->port_attr_cont.ac.class = &sas_port_class.class;
1330         i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1331         i->port_attr_cont.ac.match = sas_port_match;
1332         transport_container_register(&i->port_attr_cont);
1333
1334         i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1335         i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1336         i->rphy_attr_cont.ac.match = sas_rphy_match;
1337         transport_container_register(&i->rphy_attr_cont);
1338
1339         i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1340         i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1341         i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1342         transport_container_register(&i->end_dev_attr_cont);
1343
1344         i->expander_attr_cont.ac.class = &sas_expander_class.class;
1345         i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1346         i->expander_attr_cont.ac.match = sas_expander_match;
1347         transport_container_register(&i->expander_attr_cont);
1348
1349         i->f = ft;
1350
1351         count = 0;
1352         SETUP_PORT_ATTRIBUTE(num_phys);
1353         i->host_attrs[count] = NULL;
1354
1355         count = 0;
1356         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1357         SETUP_PHY_ATTRIBUTE(target_port_protocols);
1358         SETUP_PHY_ATTRIBUTE(device_type);
1359         SETUP_PHY_ATTRIBUTE(sas_address);
1360         SETUP_PHY_ATTRIBUTE(phy_identifier);
1361         //SETUP_PHY_ATTRIBUTE(port_identifier);
1362         SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1363         SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1364         SETUP_PHY_ATTRIBUTE(minimum_linkrate);
1365         SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1366         SETUP_PHY_ATTRIBUTE(maximum_linkrate);
1367
1368         SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1369         SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1370         SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1371         SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1372         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1373         SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1374         i->phy_attrs[count] = NULL;
1375
1376         count = 0;
1377         SETUP_PORT_ATTRIBUTE(num_phys);
1378         i->port_attrs[count] = NULL;
1379
1380         count = 0;
1381         SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1382         SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1383         SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1384         SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1385         SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1386         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1387                                        get_enclosure_identifier);
1388         SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1389                                        get_bay_identifier);
1390         i->rphy_attrs[count] = NULL;
1391
1392         count = 0;
1393         SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1394         SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1395         SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1396         i->end_dev_attrs[count] = NULL;
1397
1398         count = 0;
1399         SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1400         SETUP_EXPANDER_ATTRIBUTE(product_id);
1401         SETUP_EXPANDER_ATTRIBUTE(product_rev);
1402         SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1403         SETUP_EXPANDER_ATTRIBUTE(component_id);
1404         SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1405         SETUP_EXPANDER_ATTRIBUTE(level);
1406         i->expander_attrs[count] = NULL;
1407
1408         return &i->t;
1409 }
1410 EXPORT_SYMBOL(sas_attach_transport);
1411
1412 /**
1413  * sas_release_transport  --  release SAS transport template instance
1414  * @t:          transport template instance
1415  */
1416 void sas_release_transport(struct scsi_transport_template *t)
1417 {
1418         struct sas_internal *i = to_sas_internal(t);
1419
1420         transport_container_unregister(&i->t.host_attrs);
1421         transport_container_unregister(&i->phy_attr_cont);
1422         transport_container_unregister(&i->port_attr_cont);
1423         transport_container_unregister(&i->rphy_attr_cont);
1424         transport_container_unregister(&i->end_dev_attr_cont);
1425         transport_container_unregister(&i->expander_attr_cont);
1426
1427         kfree(i);
1428 }
1429 EXPORT_SYMBOL(sas_release_transport);
1430
1431 static __init int sas_transport_init(void)
1432 {
1433         int error;
1434
1435         error = transport_class_register(&sas_host_class);
1436         if (error)
1437                 goto out;
1438         error = transport_class_register(&sas_phy_class);
1439         if (error)
1440                 goto out_unregister_transport;
1441         error = transport_class_register(&sas_port_class);
1442         if (error)
1443                 goto out_unregister_phy;
1444         error = transport_class_register(&sas_rphy_class);
1445         if (error)
1446                 goto out_unregister_port;
1447         error = transport_class_register(&sas_end_dev_class);
1448         if (error)
1449                 goto out_unregister_rphy;
1450         error = transport_class_register(&sas_expander_class);
1451         if (error)
1452                 goto out_unregister_end_dev;
1453
1454         return 0;
1455
1456  out_unregister_end_dev:
1457         transport_class_unregister(&sas_end_dev_class);
1458  out_unregister_rphy:
1459         transport_class_unregister(&sas_rphy_class);
1460  out_unregister_port:
1461         transport_class_unregister(&sas_port_class);
1462  out_unregister_phy:
1463         transport_class_unregister(&sas_phy_class);
1464  out_unregister_transport:
1465         transport_class_unregister(&sas_host_class);
1466  out:
1467         return error;
1468
1469 }
1470
1471 static void __exit sas_transport_exit(void)
1472 {
1473         transport_class_unregister(&sas_host_class);
1474         transport_class_unregister(&sas_phy_class);
1475         transport_class_unregister(&sas_port_class);
1476         transport_class_unregister(&sas_rphy_class);
1477         transport_class_unregister(&sas_end_dev_class);
1478         transport_class_unregister(&sas_expander_class);
1479 }
1480
1481 MODULE_AUTHOR("Christoph Hellwig");
1482 MODULE_DESCRIPTION("SAS Transphy Attributes");
1483 MODULE_LICENSE("GPL");
1484
1485 module_init(sas_transport_init);
1486 module_exit(sas_transport_exit);