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 #include <linux/slab.h>
  40
  41 struct block_device;
  42
  43 enum sas_class {
  44         SAS,
  45         EXPANDER
  46 };
  47
  48 enum sas_phy_role {
  49         PHY_ROLE_NONE = 0,
  50         PHY_ROLE_TARGET = 0x40,
  51         PHY_ROLE_INITIATOR = 0x80,
  52 };
  53
  54 enum sas_phy_type {
  55         PHY_TYPE_PHYSICAL,
  56         PHY_TYPE_VIRTUAL
  57 };
  58
  59 /* The events are mnemonically described in sas_dump.c
  60  * so when updating/adding events here, please also
  61  * update the other file too.
  62  */
  63 enum port_event {
  64         PORTE_BYTES_DMAED     = 0U,
  65         PORTE_BROADCAST_RCVD,
  66         PORTE_LINK_RESET_ERR,
  67         PORTE_TIMER_EVENT,
  68         PORTE_HARD_RESET,
  69         PORT_NUM_EVENTS,
  70 };
  71
  72 enum phy_event {
  73         PHYE_LOSS_OF_SIGNAL   = 0U,
  74         PHYE_OOB_DONE,
  75         PHYE_OOB_ERROR,
  76         PHYE_SPINUP_HOLD,             /* hot plug SATA, no COMWAKE sent */
  77         PHYE_RESUME_TIMEOUT,
  78         PHY_NUM_EVENTS,
  79 };
  80
  81 enum discover_event {
  82         DISCE_DISCOVER_DOMAIN   = 0U,
  83         DISCE_REVALIDATE_DOMAIN,
  84         DISCE_PROBE,
  85         DISCE_SUSPEND,
  86         DISCE_RESUME,
  87         DISCE_DESTRUCT,
  88         DISC_NUM_EVENTS,
  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_device_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         int 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         int    ex_change_count;
 142         u16    max_route_indexes;
 143         u8     num_phys;
 144
 145         u8     t2t_supp:1;
 146         u8     configuring:1;
 147         u8     conf_route_table:1;
 148
 149         u8     enclosure_logical_id[8];
 150
 151         struct ex_phy *ex_phy;
 152         struct sas_port *parent_port;
 153
 154         struct mutex cmd_mutex;
 155 };
 156
 157 /* ---------- SATA device ---------- */
 158 #define ATA_RESP_FIS_SIZE 24
 159
 160 struct sata_device {
 161         unsigned int class;
 162         u8     port_no;        /* port number, if this is a PM (Port) */
 163
 164         struct ata_port *ap;
 165         struct ata_host ata_host;
 166         struct smp_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */
 167         u8     fis[ATA_RESP_FIS_SIZE];
 168 };
 169
 170 struct ssp_device {
 171         struct list_head eh_list_node; /* pending a user requested eh action */
 172         struct scsi_lun reset_lun;
 173 };
 174
 175 enum {
 176         SAS_DEV_GONE,
 177         SAS_DEV_FOUND, /* device notified to lldd */
 178         SAS_DEV_DESTROY,
 179         SAS_DEV_EH_PENDING,
 180         SAS_DEV_LU_RESET,
 181         SAS_DEV_RESET,
 182 };
 183
 184 struct domain_device {
 185         spinlock_t done_lock;
 186         enum sas_device_type dev_type;
 187
 188         enum sas_linkrate linkrate;
 189         enum sas_linkrate min_linkrate;
 190         enum sas_linkrate max_linkrate;
 191
 192         int  pathways;
 193
 194         struct domain_device *parent;
 195         struct list_head siblings; /* devices on the same level */
 196         struct asd_sas_port *port;        /* shortcut to root of the tree */
 197         struct sas_phy *phy;
 198
 199         struct list_head dev_list_node;
 200         struct list_head disco_list_node; /* awaiting probe or destruct */
 201
 202         enum sas_protocol    iproto;
 203         enum sas_protocol    tproto;
 204
 205         struct sas_rphy *rphy;
 206
 207         u8  sas_addr[SAS_ADDR_SIZE];
 208         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 209
 210         u8  frame_rcvd[32];
 211
 212         union {
 213                 struct expander_device ex_dev;
 214                 struct sata_device     sata_dev; /* STP & directly attached */
 215                 struct ssp_device      ssp_dev;
 216         };
 217
 218         void *lldd_dev;
 219         unsigned long state;
 220         struct kref kref;
 221 };
 222
 223 struct sas_work {
 224         struct list_head drain_node;
 225         struct work_struct work;
 226 };
 227
 228 static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
 229 {
 230         INIT_WORK(&sw->work, fn);
 231         INIT_LIST_HEAD(&sw->drain_node);
 232 }
 233
 234 struct sas_discovery_event {
 235         struct sas_work work;
 236         struct asd_sas_port *port;
 237 };
 238
 239 static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
 240 {
 241         struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
 242
 243         return ev;
 244 }
 245
 246 struct sas_discovery {
 247         struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
 248         unsigned long    pending;
 249         u8     fanout_sas_addr[8];
 250         u8     eeds_a[8];
 251         u8     eeds_b[8];
 252         int    max_level;
 253 };
 254
 255 /* The port struct is Class:RW, driver:RO */
 256 struct asd_sas_port {
 257 /* private: */
 258         struct sas_discovery disc;
 259         struct domain_device *port_dev;
 260         spinlock_t dev_list_lock;
 261         struct list_head dev_list;
 262         struct list_head disco_list;
 263         struct list_head destroy_list;
 264         enum   sas_linkrate linkrate;
 265
 266         struct sas_work work;
 267         int suspended;
 268
 269 /* public: */
 270         int id;
 271
 272         enum sas_class   class;
 273         u8               sas_addr[SAS_ADDR_SIZE];
 274         u8               attached_sas_addr[SAS_ADDR_SIZE];
 275         enum sas_protocol   iproto;
 276         enum sas_protocol   tproto;
 277
 278         enum sas_oob_mode oob_mode;
 279
 280         spinlock_t       phy_list_lock;
 281         struct list_head phy_list;
 282         int              num_phys;
 283         u32              phy_mask;
 284
 285         struct sas_ha_struct *ha;
 286
 287         struct sas_port *port;
 288
 289         void *lldd_port;          /* not touched by the sas class code */
 290 };
 291
 292 struct asd_sas_event {
 293         struct sas_work work;
 294         struct asd_sas_phy *phy;
 295 };
 296
 297 static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
 298 {
 299         struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
 300
 301         return ev;
 302 }
 303
 304 /* The phy pretty much is controlled by the LLDD.
 305  * The class only reads those fields.
 306  */
 307 struct asd_sas_phy {
 308 /* private: */
 309         struct asd_sas_event   port_events[PORT_NUM_EVENTS];
 310         struct asd_sas_event   phy_events[PHY_NUM_EVENTS];
 311
 312         unsigned long port_events_pending;
 313         unsigned long phy_events_pending;
 314
 315         int error;
 316         int suspended;
 317
 318         struct sas_phy *phy;
 319
 320 /* public: */
 321         /* The following are class:RO, driver:R/W */
 322         int            enabled;   /* must be set */
 323
 324         int            id;        /* must be set */
 325         enum sas_class class;
 326         enum sas_protocol iproto;
 327         enum sas_protocol tproto;
 328
 329         enum sas_phy_type  type;
 330         enum sas_phy_role  role;
 331         enum sas_oob_mode  oob_mode;
 332         enum sas_linkrate linkrate;
 333
 334         u8   *sas_addr;           /* must be set */
 335         u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
 336
 337         spinlock_t     frame_rcvd_lock;
 338         u8             *frame_rcvd; /* must be set */
 339         int            frame_rcvd_size;
 340
 341         spinlock_t     sas_prim_lock;
 342         u32            sas_prim;
 343
 344         struct list_head port_phy_el; /* driver:RO */
 345         struct asd_sas_port      *port; /* Class:RW, driver: RO */
 346
 347         struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
 348
 349         void *lldd_phy;           /* not touched by the sas_class_code */
 350 };
 351
 352 struct scsi_core {
 353         struct Scsi_Host *shost;
 354
 355 };
 356
 357 enum sas_ha_state {
 358         SAS_HA_REGISTERED,
 359         SAS_HA_DRAINING,
 360         SAS_HA_ATA_EH_ACTIVE,
 361         SAS_HA_FROZEN,
 362 };
 363
 364 struct sas_ha_struct {
 365 /* private: */
 366         struct list_head  defer_q; /* work queued while draining */
 367         struct mutex      drain_mutex;
 368         unsigned long     state;
 369         spinlock_t        lock;
 370         int               eh_active;
 371         wait_queue_head_t eh_wait_q;
 372         struct list_head  eh_dev_q;
 373
 374         struct mutex disco_mutex;
 375
 376         struct scsi_core core;
 377
 378 /* public: */
 379         char *sas_ha_name;
 380         struct device *dev;       /* should be set */
 381         struct module *lldd_module; /* should be set */
 382
 383         u8 *sas_addr;             /* must be set */
 384         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 385
 386         spinlock_t      phy_port_lock;
 387         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 388         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 389         int             num_phys; /* must be set, gt 0, static */
 390
 391         int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
 392                                 * their siblings when forming wide ports */
 393
 394         /* LLDD calls these to notify the class of an event. */
 395         int (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 396         int (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 397
 398         void *lldd_ha;            /* not touched by sas class code */
 399
 400         struct list_head eh_done_q;  /* complete via scsi_eh_flush_done_q */
 401         struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
 402 };
 403
 404 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 405
 406 static inline struct domain_device *
 407 starget_to_domain_dev(struct scsi_target *starget) {
 408         return starget->hostdata;
 409 }
 410
 411 static inline struct domain_device *
 412 sdev_to_domain_dev(struct scsi_device *sdev) {
 413         return starget_to_domain_dev(sdev->sdev_target);
 414 }
 415
 416 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
 417 {
 418         return &dev->sata_dev.ap->link.device[0];
 419 }
 420
 421 static inline struct domain_device *
 422 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 423 {
 424         return sdev_to_domain_dev(cmd->device);
 425 }
 426
 427 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 428
 429 /* Before calling a notify event, LLDD should use this function
 430  * when the link is severed (possibly from its tasklet).
 431  * The idea is that the Class only reads those, while the LLDD,
 432  * can R/W these (thus avoiding a race).
 433  */
 434 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 435 {
 436         phy->oob_mode = OOB_NOT_CONNECTED;
 437         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 438 }
 439
 440 static inline unsigned int to_sas_gpio_od(int device, int bit)
 441 {
 442         return 3 * device + bit;
 443 }
 444
 445 static inline void sas_put_local_phy(struct sas_phy *phy)
 446 {
 447         put_device(&phy->dev);
 448 }
 449
 450 #ifdef CONFIG_SCSI_SAS_HOST_SMP
 451 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
 452 #else
 453 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
 454 {
 455         return -1;
 456 }
 457 #endif
 458
 459 /* ---------- Tasks ---------- */
 460 /*
 461       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 462   exec_status          |                     |                       |
 463   ---------------------+---------------------+-----------------------+
 464        SAM_...         |         X           |                       |
 465        DEV_NO_RESPONSE |         X           |           X           |
 466        INTERRUPTED     |         X           |                       |
 467        QUEUE_FULL      |                     |           X           |
 468        DEVICE_UNKNOWN  |                     |           X           |
 469        SG_ERR          |                     |           X           |
 470   ---------------------+---------------------+-----------------------+
 471  */
 472
 473 enum service_response {
 474         SAS_TASK_COMPLETE,
 475         SAS_TASK_UNDELIVERED = -1,
 476 };
 477
 478 enum exec_status {
 479         /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
 480          * them here to silence 'case value not in enumerated type' warnings
 481          */
 482         __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 483
 484         SAS_DEV_NO_RESPONSE = 0x80,
 485         SAS_DATA_UNDERRUN,
 486         SAS_DATA_OVERRUN,
 487         SAS_INTERRUPTED,
 488         SAS_QUEUE_FULL,
 489         SAS_DEVICE_UNKNOWN,
 490         SAS_SG_ERR,
 491         SAS_OPEN_REJECT,
 492         SAS_OPEN_TO,
 493         SAS_PROTO_RESPONSE,
 494         SAS_PHY_DOWN,
 495         SAS_NAK_R_ERR,
 496         SAS_PENDING,
 497         SAS_ABORTED_TASK,
 498 };
 499
 500 /* When a task finishes with a response, the LLDD examines the
 501  * response:
 502  *      - For an ATA task task_status_struct::stat is set to
 503  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 504  * contents of struct ata_task_resp.
 505  *      - For SSP tasks, if no data is present or status/TMF response
 506  * is valid, task_status_struct::stat is set.  If data is present
 507  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 508  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 509  * set to SAM_CHECK_COND.
 510  *
 511  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 512  * for ATA task.
 513  *
 514  * "frame_len" is the total frame length, which could be more or less
 515  * than actually copied.
 516  *
 517  * Tasks ending with response, always set the residual field.
 518  */
 519 struct ata_task_resp {
 520         u16  frame_len;
 521         u8   ending_fis[ATA_RESP_FIS_SIZE];       /* dev to host or data-in */
 522 };
 523
 524 #define SAS_STATUS_BUF_SIZE 96
 525
 526 struct task_status_struct {
 527         enum service_response resp;
 528         enum exec_status      stat;
 529         int  buf_valid_size;
 530
 531         u8   buf[SAS_STATUS_BUF_SIZE];
 532
 533         u32  residual;
 534         enum sas_open_rej_reason open_rej_reason;
 535 };
 536
 537 /* ATA and ATAPI task queuable to a SAS LLDD.
 538  */
 539 struct sas_ata_task {
 540         struct host_to_dev_fis fis;
 541         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 542
 543         u8     retry_count;       /* hardware retry, should be > 0 */
 544
 545         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 546         u8     use_ncq:1;
 547         u8     set_affil_pol:1;
 548         u8     stp_affil_pol:1;
 549
 550         u8     device_control_reg_update:1;
 551 };
 552
 553 struct sas_smp_task {
 554         struct scatterlist smp_req;
 555         struct scatterlist smp_resp;
 556 };
 557
 558 enum task_attribute {
 559         TASK_ATTR_SIMPLE = 0,
 560         TASK_ATTR_HOQ    = 1,
 561         TASK_ATTR_ORDERED= 2,
 562         TASK_ATTR_ACA    = 4,
 563 };
 564
 565 struct sas_ssp_task {
 566         u8     retry_count;       /* hardware retry, should be > 0 */
 567
 568         u8     LUN[8];
 569         u8     enable_first_burst:1;
 570         enum   task_attribute task_attr;
 571         u8     task_prio;
 572         struct scsi_cmnd *cmd;
 573 };
 574
 575 struct sas_task {
 576         struct domain_device *dev;
 577
 578         spinlock_t   task_state_lock;
 579         unsigned     task_state_flags;
 580
 581         enum   sas_protocol      task_proto;
 582
 583         union {
 584                 struct sas_ata_task ata_task;
 585                 struct sas_smp_task smp_task;
 586                 struct sas_ssp_task ssp_task;
 587         };
 588
 589         struct scatterlist *scatter;
 590         int    num_scatter;
 591         u32    total_xfer_len;
 592         u8     data_dir:2;        /* Use PCI_DMA_... */
 593
 594         struct task_status_struct task_status;
 595         void   (*task_done)(struct sas_task *);
 596
 597         void   *lldd_task;        /* for use by LLDDs */
 598         void   *uldd_task;
 599         struct sas_task_slow *slow_task;
 600 };
 601
 602 struct sas_task_slow {
 603         /* standard/extra infrastructure for slow path commands (SMP and
 604          * internal lldd commands
 605          */
 606         struct timer_list     timer;
 607         struct completion     completion;
 608         struct sas_task       *task;
 609 };
 610
 611 #define SAS_TASK_STATE_PENDING      1
 612 #define SAS_TASK_STATE_DONE         2
 613 #define SAS_TASK_STATE_ABORTED      4
 614 #define SAS_TASK_NEED_DEV_RESET     8
 615 #define SAS_TASK_AT_INITIATOR       16
 616
 617 extern struct sas_task *sas_alloc_task(gfp_t flags);
 618 extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
 619 extern void sas_free_task(struct sas_task *task);
 620
 621 struct sas_domain_function_template {
 622         /* The class calls these to notify the LLDD of an event. */
 623         void (*lldd_port_formed)(struct asd_sas_phy *);
 624         void (*lldd_port_deformed)(struct asd_sas_phy *);
 625
 626         /* The class calls these when a device is found or gone. */
 627         int  (*lldd_dev_found)(struct domain_device *);
 628         void (*lldd_dev_gone)(struct domain_device *);
 629
 630         int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
 631
 632         /* Task Management Functions. Must be called from process context. */
 633         int (*lldd_abort_task)(struct sas_task *);
 634         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 635         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 636         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 637         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 638         int (*lldd_ata_check_ready)(struct domain_device *);
 639         void (*lldd_ata_set_dmamode)(struct domain_device *);
 640         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 641         int (*lldd_query_task)(struct sas_task *);
 642
 643         /* Port and Adapter management */
 644         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 645         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 646
 647         /* Phy management */
 648         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 649
 650         /* GPIO support */
 651         int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
 652                                u8 reg_index, u8 reg_count, u8 *write_data);
 653 };
 654
 655 extern int sas_register_ha(struct sas_ha_struct *);
 656 extern int sas_unregister_ha(struct sas_ha_struct *);
 657 extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
 658 extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
 659 extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
 660
 661 int sas_set_phy_speed(struct sas_phy *phy,
 662                       struct sas_phy_linkrates *rates);
 663 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
 664 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
 665 extern int sas_target_alloc(struct scsi_target *);
 666 extern int sas_slave_configure(struct scsi_device *);
 667 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
 668 extern int sas_bios_param(struct scsi_device *,
 669                           struct block_device *,
 670                           sector_t capacity, int *hsc);
 671 extern struct scsi_transport_template *
 672 sas_domain_attach_transport(struct sas_domain_function_template *);
 673
 674 int  sas_discover_root_expander(struct domain_device *);
 675
 676 void sas_init_ex_attr(void);
 677
 678 int  sas_ex_revalidate_domain(struct domain_device *);
 679
 680 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
 681 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 682 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 683
 684 int  sas_discover_sata(struct domain_device *);
 685 int  sas_discover_end_dev(struct domain_device *);
 686
 687 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
 688
 689 void sas_init_dev(struct domain_device *);
 690
 691 void sas_task_abort(struct sas_task *);
 692 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
 693 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 694 int sas_eh_target_reset_handler(struct scsi_cmnd *cmd);
 695
 696 extern void sas_target_destroy(struct scsi_target *);
 697 extern int sas_slave_alloc(struct scsi_device *);
 698 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 699 extern int sas_drain_work(struct sas_ha_struct *ha);
 700
 701 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 702                                   struct ssp_response_iu *iu);
 703 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
 704
 705 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 706
 707 #endif /* _SASLIB_H_ */