include/scsi/libsas.h

   1 /*
   2  * SAS host prototypes and structures header file
   3  *
   4  * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
   5  * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
   6  *
   7  * This file is licensed under GPLv2.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22  * USA
  23  *
  24  */
  25
  26 #ifndef _LIBSAS_H_
  27 #define _LIBSAS_H_
  28
  29
  30 #include <linux/timer.h>
  31 #include <linux/pci.h>
  32 #include <scsi/sas.h>
  33 #include <linux/libata.h>
  34 #include <linux/list.h>
  35 #include <scsi/scsi_device.h>
  36 #include <scsi/scsi_cmnd.h>
  37 #include <scsi/scsi_transport_sas.h>
  38 #include <linux/scatterlist.h>
  39
  40 struct block_device;
  41
  42 enum sas_class {
  43         SAS,
  44         EXPANDER
  45 };
  46
  47 enum sas_phy_role {
  48         PHY_ROLE_NONE = 0,
  49         PHY_ROLE_TARGET = 0x40,
  50         PHY_ROLE_INITIATOR = 0x80,
  51 };
  52
  53 enum sas_phy_type {
  54         PHY_TYPE_PHYSICAL,
  55         PHY_TYPE_VIRTUAL
  56 };
  57
  58 /* The events are mnemonically described in sas_dump.c
  59  * so when updating/adding events here, please also
  60  * update the other file too.
  61  */
  62 enum ha_event {
  63         HAE_RESET             = 0U,
  64         HA_NUM_EVENTS         = 1,
  65 };
  66
  67 enum port_event {
  68         PORTE_BYTES_DMAED     = 0U,
  69         PORTE_BROADCAST_RCVD  = 1,
  70         PORTE_LINK_RESET_ERR  = 2,
  71         PORTE_TIMER_EVENT     = 3,
  72         PORTE_HARD_RESET      = 4,
  73         PORT_NUM_EVENTS       = 5,
  74 };
  75
  76 enum phy_event {
  77         PHYE_LOSS_OF_SIGNAL   = 0U,
  78         PHYE_OOB_DONE         = 1,
  79         PHYE_OOB_ERROR        = 2,
  80         PHYE_SPINUP_HOLD      = 3, /* hot plug SATA, no COMWAKE sent */
  81         PHY_NUM_EVENTS        = 4,
  82 };
  83
  84 enum discover_event {
  85         DISCE_DISCOVER_DOMAIN   = 0U,
  86         DISCE_REVALIDATE_DOMAIN = 1,
  87         DISCE_PORT_GONE         = 2,
  88         DISC_NUM_EVENTS         = 3,
  89 };
  90
  91 /* ---------- Expander Devices ---------- */
  92
  93 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
  94 #define to_dev_attr(_attr)  container_of(_attr, struct domain_dev_attribute,\
  95                                          attr)
  96
  97 enum routing_attribute {
  98         DIRECT_ROUTING,
  99         SUBTRACTIVE_ROUTING,
 100         TABLE_ROUTING,
 101 };
 102
 103 enum ex_phy_state {
 104         PHY_EMPTY,
 105         PHY_VACANT,
 106         PHY_NOT_PRESENT,
 107         PHY_DEVICE_DISCOVERED
 108 };
 109
 110 struct ex_phy {
 111         int    phy_id;
 112
 113         enum ex_phy_state phy_state;
 114
 115         enum sas_dev_type attached_dev_type;
 116         enum sas_linkrate linkrate;
 117
 118         u8   attached_sata_host:1;
 119         u8   attached_sata_dev:1;
 120         u8   attached_sata_ps:1;
 121
 122         enum sas_protocol attached_tproto;
 123         enum sas_protocol attached_iproto;
 124
 125         u8   attached_sas_addr[SAS_ADDR_SIZE];
 126         u8   attached_phy_id;
 127
 128         u8   phy_change_count;
 129         enum routing_attribute routing_attr;
 130         u8   virtual:1;
 131
 132         int  last_da_index;
 133
 134         struct sas_phy *phy;
 135         struct sas_port *port;
 136 };
 137
 138 struct expander_device {
 139         struct list_head children;
 140
 141         u16    ex_change_count;
 142         u16    max_route_indexes;
 143         u8     num_phys;
 144         u8     configuring:1;
 145         u8     conf_route_table:1;
 146         u8     enclosure_logical_id[8];
 147
 148         struct ex_phy *ex_phy;
 149         struct sas_port *parent_port;
 150 };
 151
 152 /* ---------- SATA device ---------- */
 153 enum ata_command_set {
 154         ATA_COMMAND_SET   = 0,
 155         ATAPI_COMMAND_SET = 1,
 156 };
 157
 158 struct sata_device {
 159         enum   ata_command_set command_set;
 160         struct smp_resp        rps_resp; /* report_phy_sata_resp */
 161         __le16 *identify_device;
 162         __le16 *identify_packet_device;
 163
 164         u8     port_no;        /* port number, if this is a PM (Port) */
 165         struct list_head children; /* PM Ports if this is a PM */
 166
 167         struct ata_port *ap;
 168         struct ata_host ata_host;
 169         struct ata_taskfile tf;
 170         u32 sstatus;
 171         u32 serror;
 172         u32 scontrol;
 173 };
 174
 175 /* ---------- Domain device ---------- */
 176 struct domain_device {
 177         enum sas_dev_type dev_type;
 178
 179         enum sas_linkrate linkrate;
 180         enum sas_linkrate min_linkrate;
 181         enum sas_linkrate max_linkrate;
 182
 183         int  pathways;
 184
 185         struct domain_device *parent;
 186         struct list_head siblings; /* devices on the same level */
 187         struct asd_sas_port *port;        /* shortcut to root of the tree */
 188
 189         struct list_head dev_list_node;
 190
 191         enum sas_protocol    iproto;
 192         enum sas_protocol    tproto;
 193
 194         struct sas_rphy *rphy;
 195
 196         u8  sas_addr[SAS_ADDR_SIZE];
 197         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 198
 199         u8  frame_rcvd[32];
 200
 201         union {
 202                 struct expander_device ex_dev;
 203                 struct sata_device     sata_dev; /* STP & directly attached */
 204         };
 205
 206         void *lldd_dev;
 207 };
 208
 209 struct sas_discovery_event {
 210         struct work_struct work;
 211         struct asd_sas_port *port;
 212 };
 213
 214 struct sas_discovery {
 215         spinlock_t disc_event_lock;
 216         struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
 217         unsigned long    pending;
 218         u8     fanout_sas_addr[8];
 219         u8     eeds_a[8];
 220         u8     eeds_b[8];
 221         int    max_level;
 222 };
 223
 224
 225 /* The port struct is Class:RW, driver:RO */
 226 struct asd_sas_port {
 227 /* private: */
 228         struct completion port_gone_completion;
 229
 230         struct sas_discovery disc;
 231         struct domain_device *port_dev;
 232         spinlock_t dev_list_lock;
 233         struct list_head dev_list;
 234         enum   sas_linkrate linkrate;
 235
 236         struct sas_phy *phy;
 237         struct work_struct work;
 238
 239 /* public: */
 240         int id;
 241
 242         enum sas_class   class;
 243         u8               sas_addr[SAS_ADDR_SIZE];
 244         u8               attached_sas_addr[SAS_ADDR_SIZE];
 245         enum sas_protocol   iproto;
 246         enum sas_protocol   tproto;
 247
 248         enum sas_oob_mode oob_mode;
 249
 250         spinlock_t       phy_list_lock;
 251         struct list_head phy_list;
 252         int              num_phys;
 253         u32              phy_mask;
 254
 255         struct sas_ha_struct *ha;
 256
 257         struct sas_port *port;
 258
 259         void *lldd_port;          /* not touched by the sas class code */
 260 };
 261
 262 struct asd_sas_event {
 263         struct work_struct work;
 264         struct asd_sas_phy *phy;
 265 };
 266
 267 /* The phy pretty much is controlled by the LLDD.
 268  * The class only reads those fields.
 269  */
 270 struct asd_sas_phy {
 271 /* private: */
 272         /* protected by ha->event_lock */
 273         struct asd_sas_event   port_events[PORT_NUM_EVENTS];
 274         struct asd_sas_event   phy_events[PHY_NUM_EVENTS];
 275
 276         unsigned long port_events_pending;
 277         unsigned long phy_events_pending;
 278
 279         int error;
 280
 281         struct sas_phy *phy;
 282
 283 /* public: */
 284         /* The following are class:RO, driver:R/W */
 285         int            enabled;   /* must be set */
 286
 287         int            id;        /* must be set */
 288         enum sas_class class;
 289         enum sas_protocol iproto;
 290         enum sas_protocol tproto;
 291
 292         enum sas_phy_type  type;
 293         enum sas_phy_role  role;
 294         enum sas_oob_mode  oob_mode;
 295         enum sas_linkrate linkrate;
 296
 297         u8   *sas_addr;           /* must be set */
 298         u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
 299
 300         spinlock_t     frame_rcvd_lock;
 301         u8             *frame_rcvd; /* must be set */
 302         int            frame_rcvd_size;
 303
 304         spinlock_t     sas_prim_lock;
 305         u32            sas_prim;
 306
 307         struct list_head port_phy_el; /* driver:RO */
 308         struct asd_sas_port      *port; /* Class:RW, driver: RO */
 309
 310         struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
 311
 312         void *lldd_phy;           /* not touched by the sas_class_code */
 313 };
 314
 315 struct scsi_core {
 316         struct Scsi_Host *shost;
 317
 318         spinlock_t        task_queue_lock;
 319         struct list_head  task_queue;
 320         int               task_queue_size;
 321
 322         struct task_struct *queue_thread;
 323 };
 324
 325 struct sas_ha_event {
 326         struct work_struct work;
 327         struct sas_ha_struct *ha;
 328 };
 329
 330 enum sas_ha_state {
 331         SAS_HA_REGISTERED,
 332         SAS_HA_UNREGISTERED
 333 };
 334
 335 struct sas_ha_struct {
 336 /* private: */
 337         spinlock_t       event_lock;
 338         struct sas_ha_event ha_events[HA_NUM_EVENTS];
 339         unsigned long    pending;
 340
 341         enum sas_ha_state state;
 342         spinlock_t        state_lock;
 343
 344         struct scsi_core core;
 345
 346 /* public: */
 347         char *sas_ha_name;
 348         struct device *dev;       /* should be set */
 349         struct module *lldd_module; /* should be set */
 350
 351         u8 *sas_addr;             /* must be set */
 352         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 353
 354         spinlock_t      phy_port_lock;
 355         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 356         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 357         int             num_phys; /* must be set, gt 0, static */
 358
 359         /* The class calls this to send a task for execution. */
 360         int lldd_max_execute_num;
 361         int lldd_queue_size;
 362
 363         /* LLDD calls these to notify the class of an event. */
 364         void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
 365         void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 366         void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 367
 368         void *lldd_ha;            /* not touched by sas class code */
 369
 370         struct list_head eh_done_q;
 371 };
 372
 373 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 374
 375 static inline struct domain_device *
 376 starget_to_domain_dev(struct scsi_target *starget) {
 377         return starget->hostdata;
 378 }
 379
 380 static inline struct domain_device *
 381 sdev_to_domain_dev(struct scsi_device *sdev) {
 382         return starget_to_domain_dev(sdev->sdev_target);
 383 }
 384
 385 static inline struct domain_device *
 386 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 387 {
 388         return sdev_to_domain_dev(cmd->device);
 389 }
 390
 391 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 392
 393 /* Before calling a notify event, LLDD should use this function
 394  * when the link is severed (possibly from its tasklet).
 395  * The idea is that the Class only reads those, while the LLDD,
 396  * can R/W these (thus avoiding a race).
 397  */
 398 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 399 {
 400         phy->oob_mode = OOB_NOT_CONNECTED;
 401         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 402 }
 403
 404 /* ---------- Tasks ---------- */
 405 /*
 406       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 407   exec_status          |                     |                       |
 408   ---------------------+---------------------+-----------------------+
 409        SAM_...         |         X           |                       |
 410        DEV_NO_RESPONSE |         X           |           X           |
 411        INTERRUPTED     |         X           |                       |
 412        QUEUE_FULL      |                     |           X           |
 413        DEVICE_UNKNOWN  |                     |           X           |
 414        SG_ERR          |                     |           X           |
 415   ---------------------+---------------------+-----------------------+
 416  */
 417
 418 enum service_response {
 419         SAS_TASK_COMPLETE,
 420         SAS_TASK_UNDELIVERED = -1,
 421 };
 422
 423 enum exec_status {
 424         SAM_GOOD         = 0,
 425         SAM_CHECK_COND   = 2,
 426         SAM_COND_MET     = 4,
 427         SAM_BUSY         = 8,
 428         SAM_INTERMEDIATE = 0x10,
 429         SAM_IM_COND_MET  = 0x12,
 430         SAM_RESV_CONFLICT= 0x14,
 431         SAM_TASK_SET_FULL= 0x28,
 432         SAM_ACA_ACTIVE   = 0x30,
 433         SAM_TASK_ABORTED = 0x40,
 434
 435         SAS_DEV_NO_RESPONSE = 0x80,
 436         SAS_DATA_UNDERRUN,
 437         SAS_DATA_OVERRUN,
 438         SAS_INTERRUPTED,
 439         SAS_QUEUE_FULL,
 440         SAS_DEVICE_UNKNOWN,
 441         SAS_SG_ERR,
 442         SAS_OPEN_REJECT,
 443         SAS_OPEN_TO,
 444         SAS_PROTO_RESPONSE,
 445         SAS_PHY_DOWN,
 446         SAS_NAK_R_ERR,
 447         SAS_PENDING,
 448         SAS_ABORTED_TASK,
 449 };
 450
 451 /* When a task finishes with a response, the LLDD examines the
 452  * response:
 453  *      - For an ATA task task_status_struct::stat is set to
 454  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 455  * contents of struct ata_task_resp.
 456  *      - For SSP tasks, if no data is present or status/TMF response
 457  * is valid, task_status_struct::stat is set.  If data is present
 458  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 459  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 460  * set to SAM_CHECK_COND.
 461  *
 462  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 463  * for ATA task.
 464  *
 465  * "frame_len" is the total frame length, which could be more or less
 466  * than actually copied.
 467  *
 468  * Tasks ending with response, always set the residual field.
 469  */
 470 struct ata_task_resp {
 471         u16  frame_len;
 472         u8   ending_fis[24];      /* dev to host or data-in */
 473         u32  sstatus;
 474         u32  serror;
 475         u32  scontrol;
 476         u32  sactive;
 477 };
 478
 479 #define SAS_STATUS_BUF_SIZE 96
 480
 481 struct task_status_struct {
 482         enum service_response resp;
 483         enum exec_status      stat;
 484         int  buf_valid_size;
 485
 486         u8   buf[SAS_STATUS_BUF_SIZE];
 487
 488         u32  residual;
 489         enum sas_open_rej_reason open_rej_reason;
 490 };
 491
 492 /* ATA and ATAPI task queuable to a SAS LLDD.
 493  */
 494 struct sas_ata_task {
 495         struct host_to_dev_fis fis;
 496         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 497
 498         u8     retry_count;       /* hardware retry, should be > 0 */
 499
 500         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 501         u8     use_ncq:1;
 502         u8     set_affil_pol:1;
 503         u8     stp_affil_pol:1;
 504
 505         u8     device_control_reg_update:1;
 506 };
 507
 508 struct sas_smp_task {
 509         struct scatterlist smp_req;
 510         struct scatterlist smp_resp;
 511 };
 512
 513 enum task_attribute {
 514         TASK_ATTR_SIMPLE = 0,
 515         TASK_ATTR_HOQ    = 1,
 516         TASK_ATTR_ORDERED= 2,
 517         TASK_ATTR_ACA    = 4,
 518 };
 519
 520 struct sas_ssp_task {
 521         u8     retry_count;       /* hardware retry, should be > 0 */
 522
 523         u8     LUN[8];
 524         u8     enable_first_burst:1;
 525         enum   task_attribute task_attr;
 526         u8     task_prio;
 527         u8     cdb[16];
 528 };
 529
 530 struct sas_task {
 531         struct domain_device *dev;
 532         struct list_head      list;
 533
 534         spinlock_t   task_state_lock;
 535         unsigned     task_state_flags;
 536
 537         enum   sas_protocol      task_proto;
 538
 539         /* Used by the discovery code. */
 540         struct timer_list     timer;
 541         struct completion     completion;
 542
 543         union {
 544                 struct sas_ata_task ata_task;
 545                 struct sas_smp_task smp_task;
 546                 struct sas_ssp_task ssp_task;
 547         };
 548
 549         struct scatterlist *scatter;
 550         int    num_scatter;
 551         u32    total_xfer_len;
 552         u8     data_dir:2;        /* Use PCI_DMA_... */
 553
 554         struct task_status_struct task_status;
 555         void   (*task_done)(struct sas_task *);
 556
 557         void   *lldd_task;        /* for use by LLDDs */
 558         void   *uldd_task;
 559
 560         struct work_struct abort_work;
 561 };
 562
 563 extern struct kmem_cache *sas_task_cache;
 564
 565 #define SAS_TASK_STATE_PENDING      1
 566 #define SAS_TASK_STATE_DONE         2
 567 #define SAS_TASK_STATE_ABORTED      4
 568 #define SAS_TASK_NEED_DEV_RESET     8
 569 #define SAS_TASK_AT_INITIATOR       16
 570
 571 static inline struct sas_task *sas_alloc_task(gfp_t flags)
 572 {
 573         struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
 574
 575         if (task) {
 576                 INIT_LIST_HEAD(&task->list);
 577                 spin_lock_init(&task->task_state_lock);
 578                 task->task_state_flags = SAS_TASK_STATE_PENDING;
 579                 init_timer(&task->timer);
 580                 init_completion(&task->completion);
 581         }
 582
 583         return task;
 584 }
 585
 586 static inline void sas_free_task(struct sas_task *task)
 587 {
 588         if (task) {
 589                 BUG_ON(!list_empty(&task->list));
 590                 kmem_cache_free(sas_task_cache, task);
 591         }
 592 }
 593
 594 struct sas_domain_function_template {
 595         /* The class calls these to notify the LLDD of an event. */
 596         void (*lldd_port_formed)(struct asd_sas_phy *);
 597         void (*lldd_port_deformed)(struct asd_sas_phy *);
 598
 599         /* The class calls these when a device is found or gone. */
 600         int  (*lldd_dev_found)(struct domain_device *);
 601         void (*lldd_dev_gone)(struct domain_device *);
 602
 603         int (*lldd_execute_task)(struct sas_task *, int num,
 604                                  gfp_t gfp_flags);
 605
 606         /* Task Management Functions. Must be called from process context. */
 607         int (*lldd_abort_task)(struct sas_task *);
 608         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 609         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 610         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 611         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 612         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 613         int (*lldd_query_task)(struct sas_task *);
 614
 615         /* Port and Adapter management */
 616         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 617         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 618
 619         /* Phy management */
 620         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 621 };
 622
 623 extern int sas_register_ha(struct sas_ha_struct *);
 624 extern int sas_unregister_ha(struct sas_ha_struct *);
 625
 626 int sas_set_phy_speed(struct sas_phy *phy,
 627                       struct sas_phy_linkrates *rates);
 628 int sas_phy_enable(struct sas_phy *phy, int enabled);
 629 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
 630 int sas_queue_up(struct sas_task *task);
 631 extern int sas_queuecommand(struct scsi_cmnd *,
 632                      void (*scsi_done)(struct scsi_cmnd *));
 633 extern int sas_target_alloc(struct scsi_target *);
 634 extern int sas_slave_alloc(struct scsi_device *);
 635 extern int sas_slave_configure(struct scsi_device *);
 636 extern void sas_slave_destroy(struct scsi_device *);
 637 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
 638 extern int sas_change_queue_type(struct scsi_device *, int qt);
 639 extern int sas_bios_param(struct scsi_device *,
 640                           struct block_device *,
 641                           sector_t capacity, int *hsc);
 642 extern struct scsi_transport_template *
 643 sas_domain_attach_transport(struct sas_domain_function_template *);
 644 extern void sas_domain_release_transport(struct scsi_transport_template *);
 645
 646 int  sas_discover_root_expander(struct domain_device *);
 647
 648 void sas_init_ex_attr(void);
 649
 650 int  sas_ex_revalidate_domain(struct domain_device *);
 651
 652 void sas_unregister_domain_devices(struct asd_sas_port *port);
 653 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 654 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 655
 656 int  sas_discover_sata(struct domain_device *);
 657 int  sas_discover_end_dev(struct domain_device *);
 658
 659 void sas_unregister_dev(struct domain_device *);
 660
 661 void sas_init_dev(struct domain_device *);
 662
 663 void sas_task_abort(struct sas_task *);
 664 int __sas_task_abort(struct sas_task *);
 665 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 666 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
 667
 668 extern void sas_target_destroy(struct scsi_target *);
 669 extern int sas_slave_alloc(struct scsi_device *);
 670 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 671
 672 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
 673                            struct request *req);
 674
 675 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 676                                   struct ssp_response_iu *iu);
 677 struct sas_phy *sas_find_local_phy(struct domain_device *dev);
 678
 679 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 680
 681 #endif /* _SASLIB_H_ */