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         struct list_head children; /* PM Ports if this is a PM */
 173
 174         struct ata_port *ap;
 175         struct ata_host ata_host;
 176         u8     fis[ATA_RESP_FIS_SIZE];
 177 };
 178
 179 enum {
 180         SAS_DEV_GONE,
 181         SAS_DEV_DESTROY,
 182 };
 183
 184 struct domain_device {
 185         spinlock_t done_lock;
 186         enum sas_dev_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         };
 216
 217         void *lldd_dev;
 218         unsigned long state;
 219         struct kref kref;
 220 };
 221
 222 struct sas_work {
 223         struct list_head drain_node;
 224         struct work_struct work;
 225 };
 226
 227 static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
 228 {
 229         INIT_WORK(&sw->work, fn);
 230         INIT_LIST_HEAD(&sw->drain_node);
 231 }
 232
 233 struct sas_discovery_event {
 234         struct sas_work work;
 235         struct asd_sas_port *port;
 236 };
 237
 238 static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
 239 {
 240         struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
 241
 242         return ev;
 243 }
 244
 245 struct sas_discovery {
 246         struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
 247         unsigned long    pending;
 248         u8     fanout_sas_addr[8];
 249         u8     eeds_a[8];
 250         u8     eeds_b[8];
 251         int    max_level;
 252 };
 253
 254 /* The port struct is Class:RW, driver:RO */
 255 struct asd_sas_port {
 256 /* private: */
 257         struct completion port_gone_completion;
 258
 259         struct sas_discovery disc;
 260         struct domain_device *port_dev;
 261         spinlock_t dev_list_lock;
 262         struct list_head dev_list;
 263         struct list_head disco_list;
 264         struct list_head destroy_list;
 265         enum   sas_linkrate linkrate;
 266
 267         struct sas_work work;
 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
 317         struct sas_phy *phy;
 318
 319 /* public: */
 320         /* The following are class:RO, driver:R/W */
 321         int            enabled;   /* must be set */
 322
 323         int            id;        /* must be set */
 324         enum sas_class class;
 325         enum sas_protocol iproto;
 326         enum sas_protocol tproto;
 327
 328         enum sas_phy_type  type;
 329         enum sas_phy_role  role;
 330         enum sas_oob_mode  oob_mode;
 331         enum sas_linkrate linkrate;
 332
 333         u8   *sas_addr;           /* must be set */
 334         u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
 335
 336         spinlock_t     frame_rcvd_lock;
 337         u8             *frame_rcvd; /* must be set */
 338         int            frame_rcvd_size;
 339
 340         spinlock_t     sas_prim_lock;
 341         u32            sas_prim;
 342
 343         struct list_head port_phy_el; /* driver:RO */
 344         struct asd_sas_port      *port; /* Class:RW, driver: RO */
 345
 346         struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
 347
 348         void *lldd_phy;           /* not touched by the sas_class_code */
 349 };
 350
 351 struct scsi_core {
 352         struct Scsi_Host *shost;
 353
 354         struct mutex      task_queue_flush;
 355         spinlock_t        task_queue_lock;
 356         struct list_head  task_queue;
 357         int               task_queue_size;
 358
 359         struct task_struct *queue_thread;
 360 };
 361
 362 struct sas_ha_event {
 363         struct sas_work work;
 364         struct sas_ha_struct *ha;
 365 };
 366
 367 static inline struct sas_ha_event *to_sas_ha_event(struct work_struct *work)
 368 {
 369         struct sas_ha_event *ev = container_of(work, typeof(*ev), work.work);
 370
 371         return ev;
 372 }
 373
 374 enum sas_ha_state {
 375         SAS_HA_REGISTERED,
 376         SAS_HA_DRAINING,
 377         SAS_HA_ATA_EH_ACTIVE,
 378         SAS_HA_FROZEN,
 379 };
 380
 381 struct sas_ha_struct {
 382 /* private: */
 383         struct sas_ha_event ha_events[HA_NUM_EVENTS];
 384         unsigned long    pending;
 385
 386         struct list_head  defer_q; /* work queued while draining */
 387         struct mutex      drain_mutex;
 388         unsigned long     state;
 389         spinlock_t        state_lock;
 390
 391         struct mutex disco_mutex;
 392
 393         struct scsi_core core;
 394
 395 /* public: */
 396         char *sas_ha_name;
 397         struct device *dev;       /* should be set */
 398         struct module *lldd_module; /* should be set */
 399
 400         u8 *sas_addr;             /* must be set */
 401         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 402
 403         spinlock_t      phy_port_lock;
 404         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 405         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 406         int             num_phys; /* must be set, gt 0, static */
 407
 408         /* The class calls this to send a task for execution. */
 409         int lldd_max_execute_num;
 410         int lldd_queue_size;
 411         int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
 412                                 * their siblings when forming wide ports */
 413
 414         /* LLDD calls these to notify the class of an event. */
 415         void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
 416         void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 417         void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 418
 419         void *lldd_ha;            /* not touched by sas class code */
 420
 421         struct list_head eh_done_q;  /* complete via scsi_eh_flush_done_q */
 422         struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
 423 };
 424
 425 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 426
 427 static inline struct domain_device *
 428 starget_to_domain_dev(struct scsi_target *starget) {
 429         return starget->hostdata;
 430 }
 431
 432 static inline struct domain_device *
 433 sdev_to_domain_dev(struct scsi_device *sdev) {
 434         return starget_to_domain_dev(sdev->sdev_target);
 435 }
 436
 437 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
 438 {
 439         return &dev->sata_dev.ap->link.device[0];
 440 }
 441
 442 static inline struct domain_device *
 443 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 444 {
 445         return sdev_to_domain_dev(cmd->device);
 446 }
 447
 448 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 449
 450 /* Before calling a notify event, LLDD should use this function
 451  * when the link is severed (possibly from its tasklet).
 452  * The idea is that the Class only reads those, while the LLDD,
 453  * can R/W these (thus avoiding a race).
 454  */
 455 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 456 {
 457         phy->oob_mode = OOB_NOT_CONNECTED;
 458         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 459 }
 460
 461 static inline unsigned int to_sas_gpio_od(int device, int bit)
 462 {
 463         return 3 * device + bit;
 464 }
 465
 466 static inline void sas_put_local_phy(struct sas_phy *phy)
 467 {
 468         put_device(&phy->dev);
 469 }
 470
 471 #ifdef CONFIG_SCSI_SAS_HOST_SMP
 472 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
 473 #else
 474 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
 475 {
 476         return -1;
 477 }
 478 #endif
 479
 480 /* ---------- Tasks ---------- */
 481 /*
 482       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 483   exec_status          |                     |                       |
 484   ---------------------+---------------------+-----------------------+
 485        SAM_...         |         X           |                       |
 486        DEV_NO_RESPONSE |         X           |           X           |
 487        INTERRUPTED     |         X           |                       |
 488        QUEUE_FULL      |                     |           X           |
 489        DEVICE_UNKNOWN  |                     |           X           |
 490        SG_ERR          |                     |           X           |
 491   ---------------------+---------------------+-----------------------+
 492  */
 493
 494 enum service_response {
 495         SAS_TASK_COMPLETE,
 496         SAS_TASK_UNDELIVERED = -1,
 497 };
 498
 499 enum exec_status {
 500         /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
 501          * them here to silence 'case value not in enumerated type' warnings
 502          */
 503         __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 504
 505         SAS_DEV_NO_RESPONSE = 0x80,
 506         SAS_DATA_UNDERRUN,
 507         SAS_DATA_OVERRUN,
 508         SAS_INTERRUPTED,
 509         SAS_QUEUE_FULL,
 510         SAS_DEVICE_UNKNOWN,
 511         SAS_SG_ERR,
 512         SAS_OPEN_REJECT,
 513         SAS_OPEN_TO,
 514         SAS_PROTO_RESPONSE,
 515         SAS_PHY_DOWN,
 516         SAS_NAK_R_ERR,
 517         SAS_PENDING,
 518         SAS_ABORTED_TASK,
 519 };
 520
 521 /* When a task finishes with a response, the LLDD examines the
 522  * response:
 523  *      - For an ATA task task_status_struct::stat is set to
 524  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 525  * contents of struct ata_task_resp.
 526  *      - For SSP tasks, if no data is present or status/TMF response
 527  * is valid, task_status_struct::stat is set.  If data is present
 528  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 529  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 530  * set to SAM_CHECK_COND.
 531  *
 532  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 533  * for ATA task.
 534  *
 535  * "frame_len" is the total frame length, which could be more or less
 536  * than actually copied.
 537  *
 538  * Tasks ending with response, always set the residual field.
 539  */
 540 struct ata_task_resp {
 541         u16  frame_len;
 542         u8   ending_fis[ATA_RESP_FIS_SIZE];       /* dev to host or data-in */
 543 };
 544
 545 #define SAS_STATUS_BUF_SIZE 96
 546
 547 struct task_status_struct {
 548         enum service_response resp;
 549         enum exec_status      stat;
 550         int  buf_valid_size;
 551
 552         u8   buf[SAS_STATUS_BUF_SIZE];
 553
 554         u32  residual;
 555         enum sas_open_rej_reason open_rej_reason;
 556 };
 557
 558 /* ATA and ATAPI task queuable to a SAS LLDD.
 559  */
 560 struct sas_ata_task {
 561         struct host_to_dev_fis fis;
 562         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 563
 564         u8     retry_count;       /* hardware retry, should be > 0 */
 565
 566         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 567         u8     use_ncq:1;
 568         u8     set_affil_pol:1;
 569         u8     stp_affil_pol:1;
 570
 571         u8     device_control_reg_update:1;
 572 };
 573
 574 struct sas_smp_task {
 575         struct scatterlist smp_req;
 576         struct scatterlist smp_resp;
 577 };
 578
 579 enum task_attribute {
 580         TASK_ATTR_SIMPLE = 0,
 581         TASK_ATTR_HOQ    = 1,
 582         TASK_ATTR_ORDERED= 2,
 583         TASK_ATTR_ACA    = 4,
 584 };
 585
 586 struct sas_ssp_task {
 587         u8     retry_count;       /* hardware retry, should be > 0 */
 588
 589         u8     LUN[8];
 590         u8     enable_first_burst:1;
 591         enum   task_attribute task_attr;
 592         u8     task_prio;
 593         u8     cdb[16];
 594 };
 595
 596 struct sas_task {
 597         struct domain_device *dev;
 598         struct list_head      list;
 599
 600         spinlock_t   task_state_lock;
 601         unsigned     task_state_flags;
 602
 603         enum   sas_protocol      task_proto;
 604
 605         /* Used by the discovery code. */
 606         struct timer_list     timer;
 607         struct completion     completion;
 608
 609         union {
 610                 struct sas_ata_task ata_task;
 611                 struct sas_smp_task smp_task;
 612                 struct sas_ssp_task ssp_task;
 613         };
 614
 615         struct scatterlist *scatter;
 616         int    num_scatter;
 617         u32    total_xfer_len;
 618         u8     data_dir:2;        /* Use PCI_DMA_... */
 619
 620         struct task_status_struct task_status;
 621         void   (*task_done)(struct sas_task *);
 622
 623         void   *lldd_task;        /* for use by LLDDs */
 624         void   *uldd_task;
 625
 626         struct work_struct abort_work;
 627 };
 628
 629 #define SAS_TASK_STATE_PENDING      1
 630 #define SAS_TASK_STATE_DONE         2
 631 #define SAS_TASK_STATE_ABORTED      4
 632 #define SAS_TASK_NEED_DEV_RESET     8
 633 #define SAS_TASK_AT_INITIATOR       16
 634
 635 extern struct sas_task *sas_alloc_task(gfp_t flags);
 636 extern void sas_free_task(struct sas_task *task);
 637
 638 struct sas_domain_function_template {
 639         /* The class calls these to notify the LLDD of an event. */
 640         void (*lldd_port_formed)(struct asd_sas_phy *);
 641         void (*lldd_port_deformed)(struct asd_sas_phy *);
 642
 643         /* The class calls these when a device is found or gone. */
 644         int  (*lldd_dev_found)(struct domain_device *);
 645         void (*lldd_dev_gone)(struct domain_device *);
 646
 647         int (*lldd_execute_task)(struct sas_task *, int num,
 648                                  gfp_t gfp_flags);
 649
 650         /* Task Management Functions. Must be called from process context. */
 651         int (*lldd_abort_task)(struct sas_task *);
 652         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 653         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 654         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 655         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 656         int (*lldd_ata_check_ready)(struct domain_device *);
 657         void (*lldd_ata_set_dmamode)(struct domain_device *);
 658         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 659         int (*lldd_query_task)(struct sas_task *);
 660
 661         /* Port and Adapter management */
 662         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 663         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 664
 665         /* Phy management */
 666         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 667
 668         /* GPIO support */
 669         int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
 670                                u8 reg_index, u8 reg_count, u8 *write_data);
 671 };
 672
 673 extern int sas_register_ha(struct sas_ha_struct *);
 674 extern int sas_unregister_ha(struct sas_ha_struct *);
 675
 676 int sas_set_phy_speed(struct sas_phy *phy,
 677                       struct sas_phy_linkrates *rates);
 678 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
 679 int sas_queue_up(struct sas_task *task);
 680 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
 681 extern int sas_target_alloc(struct scsi_target *);
 682 extern int sas_slave_configure(struct scsi_device *);
 683 extern int sas_change_queue_depth(struct scsi_device *, int new_depth,
 684                                   int reason);
 685 extern int sas_change_queue_type(struct scsi_device *, int qt);
 686 extern int sas_bios_param(struct scsi_device *,
 687                           struct block_device *,
 688                           sector_t capacity, int *hsc);
 689 extern struct scsi_transport_template *
 690 sas_domain_attach_transport(struct sas_domain_function_template *);
 691 extern void sas_domain_release_transport(struct scsi_transport_template *);
 692
 693 int  sas_discover_root_expander(struct domain_device *);
 694
 695 void sas_init_ex_attr(void);
 696
 697 int  sas_ex_revalidate_domain(struct domain_device *);
 698
 699 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
 700 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 701 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 702
 703 int  sas_discover_sata(struct domain_device *);
 704 int  sas_discover_end_dev(struct domain_device *);
 705
 706 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
 707
 708 void sas_init_dev(struct domain_device *);
 709
 710 void sas_task_abort(struct sas_task *);
 711 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 712 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
 713
 714 extern void sas_target_destroy(struct scsi_target *);
 715 extern int sas_slave_alloc(struct scsi_device *);
 716 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 717 extern int sas_drain_work(struct sas_ha_struct *ha);
 718
 719 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
 720                            struct request *req);
 721
 722 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 723                                   struct ssp_response_iu *iu);
 724 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
 725
 726 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 727
 728 #endif /* _SASLIB_H_ */