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 ha_event {
  64         HAE_RESET             = 0U,
  65         HA_NUM_EVENTS         = 1,
  66 };
  67
  68 enum port_event {
  69         PORTE_BYTES_DMAED     = 0U,
  70         PORTE_BROADCAST_RCVD  = 1,
  71         PORTE_LINK_RESET_ERR  = 2,
  72         PORTE_TIMER_EVENT     = 3,
  73         PORTE_HARD_RESET      = 4,
  74         PORT_NUM_EVENTS       = 5,
  75 };
  76
  77 enum phy_event {
  78         PHYE_LOSS_OF_SIGNAL   = 0U,
  79         PHYE_OOB_DONE         = 1,
  80         PHYE_OOB_ERROR        = 2,
  81         PHYE_SPINUP_HOLD      = 3, /* hot plug SATA, no COMWAKE sent */
  82         PHY_NUM_EVENTS        = 4,
  83 };
  84
  85 enum discover_event {
  86         DISCE_DISCOVER_DOMAIN   = 0U,
  87         DISCE_REVALIDATE_DOMAIN = 1,
  88         DISCE_PORT_GONE         = 2,
  89         DISCE_PROBE             = 3,
  90         DISCE_DESTRUCT          = 4,
  91         DISC_NUM_EVENTS         = 5,
  92 };
  93
  94 /* ---------- Expander Devices ---------- */
  95
  96 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
  97 #define to_dev_attr(_attr)  container_of(_attr, struct domain_dev_attribute,\
  98                                          attr)
  99
 100 enum routing_attribute {
 101         DIRECT_ROUTING,
 102         SUBTRACTIVE_ROUTING,
 103         TABLE_ROUTING,
 104 };
 105
 106 enum ex_phy_state {
 107         PHY_EMPTY,
 108         PHY_VACANT,
 109         PHY_NOT_PRESENT,
 110         PHY_DEVICE_DISCOVERED
 111 };
 112
 113 struct ex_phy {
 114         int    phy_id;
 115
 116         enum ex_phy_state phy_state;
 117
 118         enum sas_dev_type attached_dev_type;
 119         enum sas_linkrate linkrate;
 120
 121         u8   attached_sata_host:1;
 122         u8   attached_sata_dev:1;
 123         u8   attached_sata_ps:1;
 124
 125         enum sas_protocol attached_tproto;
 126         enum sas_protocol attached_iproto;
 127
 128         u8   attached_sas_addr[SAS_ADDR_SIZE];
 129         u8   attached_phy_id;
 130
 131         u8   phy_change_count;
 132         enum routing_attribute routing_attr;
 133         u8   virtual:1;
 134
 135         int  last_da_index;
 136
 137         struct sas_phy *phy;
 138         struct sas_port *port;
 139 };
 140
 141 struct expander_device {
 142         struct list_head children;
 143
 144         u16    ex_change_count;
 145         u16    max_route_indexes;
 146         u8     num_phys;
 147
 148         u8     t2t_supp:1;
 149         u8     configuring:1;
 150         u8     conf_route_table:1;
 151
 152         u8     enclosure_logical_id[8];
 153
 154         struct ex_phy *ex_phy;
 155         struct sas_port *parent_port;
 156
 157         struct mutex cmd_mutex;
 158 };
 159
 160 /* ---------- SATA device ---------- */
 161 enum ata_command_set {
 162         ATA_COMMAND_SET   = 0,
 163         ATAPI_COMMAND_SET = 1,
 164 };
 165
 166 #define ATA_RESP_FIS_SIZE 24
 167
 168 struct sata_device {
 169         enum   ata_command_set command_set;
 170         struct smp_resp        rps_resp; /* report_phy_sata_resp */
 171         u8     port_no;        /* port number, if this is a PM (Port) */
 172
 173         struct ata_port *ap;
 174         struct ata_host ata_host;
 175         u8     fis[ATA_RESP_FIS_SIZE];
 176 };
 177
 178 struct ssp_device {
 179         struct list_head eh_list_node; /* pending a user requested eh action */
 180         struct scsi_lun reset_lun;
 181 };
 182
 183 enum {
 184         SAS_DEV_GONE,
 185         SAS_DEV_DESTROY,
 186         SAS_DEV_EH_PENDING,
 187         SAS_DEV_LU_RESET,
 188         SAS_DEV_RESET,
 189 };
 190
 191 struct domain_device {
 192         spinlock_t done_lock;
 193         enum sas_dev_type dev_type;
 194
 195         enum sas_linkrate linkrate;
 196         enum sas_linkrate min_linkrate;
 197         enum sas_linkrate max_linkrate;
 198
 199         int  pathways;
 200
 201         struct domain_device *parent;
 202         struct list_head siblings; /* devices on the same level */
 203         struct asd_sas_port *port;        /* shortcut to root of the tree */
 204         struct sas_phy *phy;
 205
 206         struct list_head dev_list_node;
 207         struct list_head disco_list_node; /* awaiting probe or destruct */
 208
 209         enum sas_protocol    iproto;
 210         enum sas_protocol    tproto;
 211
 212         struct sas_rphy *rphy;
 213
 214         u8  sas_addr[SAS_ADDR_SIZE];
 215         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 216
 217         u8  frame_rcvd[32];
 218
 219         union {
 220                 struct expander_device ex_dev;
 221                 struct sata_device     sata_dev; /* STP & directly attached */
 222                 struct ssp_device      ssp_dev;
 223         };
 224
 225         void *lldd_dev;
 226         unsigned long state;
 227         struct kref kref;
 228 };
 229
 230 struct sas_work {
 231         struct list_head drain_node;
 232         struct work_struct work;
 233 };
 234
 235 static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
 236 {
 237         INIT_WORK(&sw->work, fn);
 238         INIT_LIST_HEAD(&sw->drain_node);
 239 }
 240
 241 struct sas_discovery_event {
 242         struct sas_work work;
 243         struct asd_sas_port *port;
 244 };
 245
 246 static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
 247 {
 248         struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
 249
 250         return ev;
 251 }
 252
 253 struct sas_discovery {
 254         struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
 255         unsigned long    pending;
 256         u8     fanout_sas_addr[8];
 257         u8     eeds_a[8];
 258         u8     eeds_b[8];
 259         int    max_level;
 260 };
 261
 262 /* The port struct is Class:RW, driver:RO */
 263 struct asd_sas_port {
 264 /* private: */
 265         struct completion port_gone_completion;
 266
 267         struct sas_discovery disc;
 268         struct domain_device *port_dev;
 269         spinlock_t dev_list_lock;
 270         struct list_head dev_list;
 271         struct list_head disco_list;
 272         struct list_head destroy_list;
 273         enum   sas_linkrate linkrate;
 274
 275         struct sas_work work;
 276
 277 /* public: */
 278         int id;
 279
 280         enum sas_class   class;
 281         u8               sas_addr[SAS_ADDR_SIZE];
 282         u8               attached_sas_addr[SAS_ADDR_SIZE];
 283         enum sas_protocol   iproto;
 284         enum sas_protocol   tproto;
 285
 286         enum sas_oob_mode oob_mode;
 287
 288         spinlock_t       phy_list_lock;
 289         struct list_head phy_list;
 290         int              num_phys;
 291         u32              phy_mask;
 292
 293         struct sas_ha_struct *ha;
 294
 295         struct sas_port *port;
 296
 297         void *lldd_port;          /* not touched by the sas class code */
 298 };
 299
 300 struct asd_sas_event {
 301         struct sas_work work;
 302         struct asd_sas_phy *phy;
 303 };
 304
 305 static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
 306 {
 307         struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
 308
 309         return ev;
 310 }
 311
 312 /* The phy pretty much is controlled by the LLDD.
 313  * The class only reads those fields.
 314  */
 315 struct asd_sas_phy {
 316 /* private: */
 317         struct asd_sas_event   port_events[PORT_NUM_EVENTS];
 318         struct asd_sas_event   phy_events[PHY_NUM_EVENTS];
 319
 320         unsigned long port_events_pending;
 321         unsigned long phy_events_pending;
 322
 323         int error;
 324
 325         struct sas_phy *phy;
 326
 327 /* public: */
 328         /* The following are class:RO, driver:R/W */
 329         int            enabled;   /* must be set */
 330
 331         int            id;        /* must be set */
 332         enum sas_class class;
 333         enum sas_protocol iproto;
 334         enum sas_protocol tproto;
 335
 336         enum sas_phy_type  type;
 337         enum sas_phy_role  role;
 338         enum sas_oob_mode  oob_mode;
 339         enum sas_linkrate linkrate;
 340
 341         u8   *sas_addr;           /* must be set */
 342         u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
 343
 344         spinlock_t     frame_rcvd_lock;
 345         u8             *frame_rcvd; /* must be set */
 346         int            frame_rcvd_size;
 347
 348         spinlock_t     sas_prim_lock;
 349         u32            sas_prim;
 350
 351         struct list_head port_phy_el; /* driver:RO */
 352         struct asd_sas_port      *port; /* Class:RW, driver: RO */
 353
 354         struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
 355
 356         void *lldd_phy;           /* not touched by the sas_class_code */
 357 };
 358
 359 struct scsi_core {
 360         struct Scsi_Host *shost;
 361
 362         struct mutex      task_queue_flush;
 363         spinlock_t        task_queue_lock;
 364         struct list_head  task_queue;
 365         int               task_queue_size;
 366
 367         struct task_struct *queue_thread;
 368 };
 369
 370 struct sas_ha_event {
 371         struct sas_work work;
 372         struct sas_ha_struct *ha;
 373 };
 374
 375 static inline struct sas_ha_event *to_sas_ha_event(struct work_struct *work)
 376 {
 377         struct sas_ha_event *ev = container_of(work, typeof(*ev), work.work);
 378
 379         return ev;
 380 }
 381
 382 enum sas_ha_state {
 383         SAS_HA_REGISTERED,
 384         SAS_HA_DRAINING,
 385         SAS_HA_ATA_EH_ACTIVE,
 386         SAS_HA_FROZEN,
 387 };
 388
 389 struct sas_ha_struct {
 390 /* private: */
 391         struct sas_ha_event ha_events[HA_NUM_EVENTS];
 392         unsigned long    pending;
 393
 394         struct list_head  defer_q; /* work queued while draining */
 395         struct mutex      drain_mutex;
 396         unsigned long     state;
 397         spinlock_t        lock;
 398         int               eh_active;
 399         wait_queue_head_t eh_wait_q;
 400         struct list_head  eh_dev_q;
 401
 402         struct mutex disco_mutex;
 403
 404         struct scsi_core core;
 405
 406 /* public: */
 407         char *sas_ha_name;
 408         struct device *dev;       /* should be set */
 409         struct module *lldd_module; /* should be set */
 410
 411         u8 *sas_addr;             /* must be set */
 412         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 413
 414         spinlock_t      phy_port_lock;
 415         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 416         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 417         int             num_phys; /* must be set, gt 0, static */
 418
 419         /* The class calls this to send a task for execution. */
 420         int lldd_max_execute_num;
 421         int lldd_queue_size;
 422         int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
 423                                 * their siblings when forming wide ports */
 424
 425         /* LLDD calls these to notify the class of an event. */
 426         void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
 427         void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 428         void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 429
 430         void *lldd_ha;            /* not touched by sas class code */
 431
 432         struct list_head eh_done_q;  /* complete via scsi_eh_flush_done_q */
 433         struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
 434 };
 435
 436 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 437
 438 static inline struct domain_device *
 439 starget_to_domain_dev(struct scsi_target *starget) {
 440         return starget->hostdata;
 441 }
 442
 443 static inline struct domain_device *
 444 sdev_to_domain_dev(struct scsi_device *sdev) {
 445         return starget_to_domain_dev(sdev->sdev_target);
 446 }
 447
 448 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
 449 {
 450         return &dev->sata_dev.ap->link.device[0];
 451 }
 452
 453 static inline struct domain_device *
 454 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 455 {
 456         return sdev_to_domain_dev(cmd->device);
 457 }
 458
 459 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 460
 461 /* Before calling a notify event, LLDD should use this function
 462  * when the link is severed (possibly from its tasklet).
 463  * The idea is that the Class only reads those, while the LLDD,
 464  * can R/W these (thus avoiding a race).
 465  */
 466 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 467 {
 468         phy->oob_mode = OOB_NOT_CONNECTED;
 469         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 470 }
 471
 472 static inline unsigned int to_sas_gpio_od(int device, int bit)
 473 {
 474         return 3 * device + bit;
 475 }
 476
 477 static inline void sas_put_local_phy(struct sas_phy *phy)
 478 {
 479         put_device(&phy->dev);
 480 }
 481
 482 #ifdef CONFIG_SCSI_SAS_HOST_SMP
 483 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
 484 #else
 485 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
 486 {
 487         return -1;
 488 }
 489 #endif
 490
 491 /* ---------- Tasks ---------- */
 492 /*
 493       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 494   exec_status          |                     |                       |
 495   ---------------------+---------------------+-----------------------+
 496        SAM_...         |         X           |                       |
 497        DEV_NO_RESPONSE |         X           |           X           |
 498        INTERRUPTED     |         X           |                       |
 499        QUEUE_FULL      |                     |           X           |
 500        DEVICE_UNKNOWN  |                     |           X           |
 501        SG_ERR          |                     |           X           |
 502   ---------------------+---------------------+-----------------------+
 503  */
 504
 505 enum service_response {
 506         SAS_TASK_COMPLETE,
 507         SAS_TASK_UNDELIVERED = -1,
 508 };
 509
 510 enum exec_status {
 511         /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
 512          * them here to silence 'case value not in enumerated type' warnings
 513          */
 514         __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 515
 516         SAS_DEV_NO_RESPONSE = 0x80,
 517         SAS_DATA_UNDERRUN,
 518         SAS_DATA_OVERRUN,
 519         SAS_INTERRUPTED,
 520         SAS_QUEUE_FULL,
 521         SAS_DEVICE_UNKNOWN,
 522         SAS_SG_ERR,
 523         SAS_OPEN_REJECT,
 524         SAS_OPEN_TO,
 525         SAS_PROTO_RESPONSE,
 526         SAS_PHY_DOWN,
 527         SAS_NAK_R_ERR,
 528         SAS_PENDING,
 529         SAS_ABORTED_TASK,
 530 };
 531
 532 /* When a task finishes with a response, the LLDD examines the
 533  * response:
 534  *      - For an ATA task task_status_struct::stat is set to
 535  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 536  * contents of struct ata_task_resp.
 537  *      - For SSP tasks, if no data is present or status/TMF response
 538  * is valid, task_status_struct::stat is set.  If data is present
 539  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 540  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 541  * set to SAM_CHECK_COND.
 542  *
 543  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 544  * for ATA task.
 545  *
 546  * "frame_len" is the total frame length, which could be more or less
 547  * than actually copied.
 548  *
 549  * Tasks ending with response, always set the residual field.
 550  */
 551 struct ata_task_resp {
 552         u16  frame_len;
 553         u8   ending_fis[ATA_RESP_FIS_SIZE];       /* dev to host or data-in */
 554 };
 555
 556 #define SAS_STATUS_BUF_SIZE 96
 557
 558 struct task_status_struct {
 559         enum service_response resp;
 560         enum exec_status      stat;
 561         int  buf_valid_size;
 562
 563         u8   buf[SAS_STATUS_BUF_SIZE];
 564
 565         u32  residual;
 566         enum sas_open_rej_reason open_rej_reason;
 567 };
 568
 569 /* ATA and ATAPI task queuable to a SAS LLDD.
 570  */
 571 struct sas_ata_task {
 572         struct host_to_dev_fis fis;
 573         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 574
 575         u8     retry_count;       /* hardware retry, should be > 0 */
 576
 577         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 578         u8     use_ncq:1;
 579         u8     set_affil_pol:1;
 580         u8     stp_affil_pol:1;
 581
 582         u8     device_control_reg_update:1;
 583 };
 584
 585 struct sas_smp_task {
 586         struct scatterlist smp_req;
 587         struct scatterlist smp_resp;
 588 };
 589
 590 enum task_attribute {
 591         TASK_ATTR_SIMPLE = 0,
 592         TASK_ATTR_HOQ    = 1,
 593         TASK_ATTR_ORDERED= 2,
 594         TASK_ATTR_ACA    = 4,
 595 };
 596
 597 struct sas_ssp_task {
 598         u8     retry_count;       /* hardware retry, should be > 0 */
 599
 600         u8     LUN[8];
 601         u8     enable_first_burst:1;
 602         enum   task_attribute task_attr;
 603         u8     task_prio;
 604         u8     cdb[16];
 605 };
 606
 607 struct sas_task {
 608         struct domain_device *dev;
 609         struct list_head      list;
 610
 611         spinlock_t   task_state_lock;
 612         unsigned     task_state_flags;
 613
 614         enum   sas_protocol      task_proto;
 615
 616         union {
 617                 struct sas_ata_task ata_task;
 618                 struct sas_smp_task smp_task;
 619                 struct sas_ssp_task ssp_task;
 620         };
 621
 622         struct scatterlist *scatter;
 623         int    num_scatter;
 624         u32    total_xfer_len;
 625         u8     data_dir:2;        /* Use PCI_DMA_... */
 626
 627         struct task_status_struct task_status;
 628         void   (*task_done)(struct sas_task *);
 629
 630         void   *lldd_task;        /* for use by LLDDs */
 631         void   *uldd_task;
 632         struct sas_task_slow *slow_task;
 633 };
 634
 635 struct sas_task_slow {
 636         /* standard/extra infrastructure for slow path commands (SMP and
 637          * internal lldd commands
 638          */
 639         struct timer_list     timer;
 640         struct completion     completion;
 641 };
 642
 643 #define SAS_TASK_STATE_PENDING      1
 644 #define SAS_TASK_STATE_DONE         2
 645 #define SAS_TASK_STATE_ABORTED      4
 646 #define SAS_TASK_NEED_DEV_RESET     8
 647 #define SAS_TASK_AT_INITIATOR       16
 648
 649 extern struct sas_task *sas_alloc_task(gfp_t flags);
 650 extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
 651 extern void sas_free_task(struct sas_task *task);
 652
 653 struct sas_domain_function_template {
 654         /* The class calls these to notify the LLDD of an event. */
 655         void (*lldd_port_formed)(struct asd_sas_phy *);
 656         void (*lldd_port_deformed)(struct asd_sas_phy *);
 657
 658         /* The class calls these when a device is found or gone. */
 659         int  (*lldd_dev_found)(struct domain_device *);
 660         void (*lldd_dev_gone)(struct domain_device *);
 661
 662         int (*lldd_execute_task)(struct sas_task *, int num,
 663                                  gfp_t gfp_flags);
 664
 665         /* Task Management Functions. Must be called from process context. */
 666         int (*lldd_abort_task)(struct sas_task *);
 667         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 668         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 669         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 670         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 671         int (*lldd_ata_check_ready)(struct domain_device *);
 672         void (*lldd_ata_set_dmamode)(struct domain_device *);
 673         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 674         int (*lldd_query_task)(struct sas_task *);
 675
 676         /* Port and Adapter management */
 677         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 678         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 679
 680         /* Phy management */
 681         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 682
 683         /* GPIO support */
 684         int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
 685                                u8 reg_index, u8 reg_count, u8 *write_data);
 686 };
 687
 688 extern int sas_register_ha(struct sas_ha_struct *);
 689 extern int sas_unregister_ha(struct sas_ha_struct *);
 690
 691 int sas_set_phy_speed(struct sas_phy *phy,
 692                       struct sas_phy_linkrates *rates);
 693 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
 694 int sas_queue_up(struct sas_task *task);
 695 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
 696 extern int sas_target_alloc(struct scsi_target *);
 697 extern int sas_slave_configure(struct scsi_device *);
 698 extern int sas_change_queue_depth(struct scsi_device *, int new_depth,
 699                                   int reason);
 700 extern int sas_change_queue_type(struct scsi_device *, int qt);
 701 extern int sas_bios_param(struct scsi_device *,
 702                           struct block_device *,
 703                           sector_t capacity, int *hsc);
 704 extern struct scsi_transport_template *
 705 sas_domain_attach_transport(struct sas_domain_function_template *);
 706 extern void sas_domain_release_transport(struct scsi_transport_template *);
 707
 708 int  sas_discover_root_expander(struct domain_device *);
 709
 710 void sas_init_ex_attr(void);
 711
 712 int  sas_ex_revalidate_domain(struct domain_device *);
 713
 714 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
 715 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 716 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 717
 718 int  sas_discover_sata(struct domain_device *);
 719 int  sas_discover_end_dev(struct domain_device *);
 720
 721 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
 722
 723 void sas_init_dev(struct domain_device *);
 724
 725 void sas_task_abort(struct sas_task *);
 726 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
 727 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 728 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
 729
 730 extern void sas_target_destroy(struct scsi_target *);
 731 extern int sas_slave_alloc(struct scsi_device *);
 732 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 733 extern int sas_drain_work(struct sas_ha_struct *ha);
 734
 735 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
 736                            struct request *req);
 737
 738 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 739                                   struct ssp_response_iu *iu);
 740 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
 741
 742 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 743
 744 #endif /* _SASLIB_H_ */