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         PHYE_RESUME_TIMEOUT   = 4,
  83         PHY_NUM_EVENTS        = 5,
  84 };
  85
  86 enum discover_event {
  87         DISCE_DISCOVER_DOMAIN   = 0U,
  88         DISCE_REVALIDATE_DOMAIN = 1,
  89         DISCE_PORT_GONE         = 2,
  90         DISCE_PROBE             = 3,
  91         DISCE_SUSPEND           = 4,
  92         DISCE_RESUME            = 5,
  93         DISCE_DESTRUCT          = 6,
  94         DISC_NUM_EVENTS         = 7,
  95 };
  96
  97 /* ---------- Expander Devices ---------- */
  98
  99 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
 100 #define to_dev_attr(_attr)  container_of(_attr, struct domain_dev_attribute,\
 101                                          attr)
 102
 103 enum routing_attribute {
 104         DIRECT_ROUTING,
 105         SUBTRACTIVE_ROUTING,
 106         TABLE_ROUTING,
 107 };
 108
 109 enum ex_phy_state {
 110         PHY_EMPTY,
 111         PHY_VACANT,
 112         PHY_NOT_PRESENT,
 113         PHY_DEVICE_DISCOVERED
 114 };
 115
 116 struct ex_phy {
 117         int    phy_id;
 118
 119         enum ex_phy_state phy_state;
 120
 121         enum sas_device_type attached_dev_type;
 122         enum sas_linkrate linkrate;
 123
 124         u8   attached_sata_host:1;
 125         u8   attached_sata_dev:1;
 126         u8   attached_sata_ps:1;
 127
 128         enum sas_protocol attached_tproto;
 129         enum sas_protocol attached_iproto;
 130
 131         u8   attached_sas_addr[SAS_ADDR_SIZE];
 132         u8   attached_phy_id;
 133
 134         int phy_change_count;
 135         enum routing_attribute routing_attr;
 136         u8   virtual:1;
 137
 138         int  last_da_index;
 139
 140         struct sas_phy *phy;
 141         struct sas_port *port;
 142 };
 143
 144 struct expander_device {
 145         struct list_head children;
 146
 147         int    ex_change_count;
 148         u16    max_route_indexes;
 149         u8     num_phys;
 150
 151         u8     t2t_supp:1;
 152         u8     configuring:1;
 153         u8     conf_route_table:1;
 154
 155         u8     enclosure_logical_id[8];
 156
 157         struct ex_phy *ex_phy;
 158         struct sas_port *parent_port;
 159
 160         struct mutex cmd_mutex;
 161 };
 162
 163 /* ---------- SATA device ---------- */
 164 #define ATA_RESP_FIS_SIZE 24
 165
 166 struct sata_device {
 167         unsigned int class;
 168         u8     port_no;        /* port number, if this is a PM (Port) */
 169
 170         struct ata_port *ap;
 171         struct ata_host ata_host;
 172         struct smp_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */
 173         u8     fis[ATA_RESP_FIS_SIZE];
 174 };
 175
 176 struct ssp_device {
 177         struct list_head eh_list_node; /* pending a user requested eh action */
 178         struct scsi_lun reset_lun;
 179 };
 180
 181 enum {
 182         SAS_DEV_GONE,
 183         SAS_DEV_FOUND, /* device notified to lldd */
 184         SAS_DEV_DESTROY,
 185         SAS_DEV_EH_PENDING,
 186         SAS_DEV_LU_RESET,
 187         SAS_DEV_RESET,
 188 };
 189
 190 struct domain_device {
 191         spinlock_t done_lock;
 192         enum sas_device_type dev_type;
 193
 194         enum sas_linkrate linkrate;
 195         enum sas_linkrate min_linkrate;
 196         enum sas_linkrate max_linkrate;
 197
 198         int  pathways;
 199
 200         struct domain_device *parent;
 201         struct list_head siblings; /* devices on the same level */
 202         struct asd_sas_port *port;        /* shortcut to root of the tree */
 203         struct sas_phy *phy;
 204
 205         struct list_head dev_list_node;
 206         struct list_head disco_list_node; /* awaiting probe or destruct */
 207
 208         enum sas_protocol    iproto;
 209         enum sas_protocol    tproto;
 210
 211         struct sas_rphy *rphy;
 212
 213         u8  sas_addr[SAS_ADDR_SIZE];
 214         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 215
 216         u8  frame_rcvd[32];
 217
 218         union {
 219                 struct expander_device ex_dev;
 220                 struct sata_device     sata_dev; /* STP & directly attached */
 221                 struct ssp_device      ssp_dev;
 222         };
 223
 224         void *lldd_dev;
 225         unsigned long state;
 226         struct kref kref;
 227 };
 228
 229 struct sas_work {
 230         struct list_head drain_node;
 231         struct work_struct work;
 232 };
 233
 234 static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
 235 {
 236         INIT_WORK(&sw->work, fn);
 237         INIT_LIST_HEAD(&sw->drain_node);
 238 }
 239
 240 struct sas_discovery_event {
 241         struct sas_work work;
 242         struct asd_sas_port *port;
 243 };
 244
 245 static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
 246 {
 247         struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
 248
 249         return ev;
 250 }
 251
 252 struct sas_discovery {
 253         struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
 254         unsigned long    pending;
 255         u8     fanout_sas_addr[8];
 256         u8     eeds_a[8];
 257         u8     eeds_b[8];
 258         int    max_level;
 259 };
 260
 261 /* The port struct is Class:RW, driver:RO */
 262 struct asd_sas_port {
 263 /* private: */
 264         struct completion port_gone_completion;
 265
 266         struct sas_discovery disc;
 267         struct domain_device *port_dev;
 268         spinlock_t dev_list_lock;
 269         struct list_head dev_list;
 270         struct list_head disco_list;
 271         struct list_head destroy_list;
 272         enum   sas_linkrate linkrate;
 273
 274         struct sas_work work;
 275         int suspended;
 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         int suspended;
 325
 326         struct sas_phy *phy;
 327
 328 /* public: */
 329         /* The following are class:RO, driver:R/W */
 330         int            enabled;   /* must be set */
 331
 332         int            id;        /* must be set */
 333         enum sas_class class;
 334         enum sas_protocol iproto;
 335         enum sas_protocol tproto;
 336
 337         enum sas_phy_type  type;
 338         enum sas_phy_role  role;
 339         enum sas_oob_mode  oob_mode;
 340         enum sas_linkrate linkrate;
 341
 342         u8   *sas_addr;           /* must be set */
 343         u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
 344
 345         spinlock_t     frame_rcvd_lock;
 346         u8             *frame_rcvd; /* must be set */
 347         int            frame_rcvd_size;
 348
 349         spinlock_t     sas_prim_lock;
 350         u32            sas_prim;
 351
 352         struct list_head port_phy_el; /* driver:RO */
 353         struct asd_sas_port      *port; /* Class:RW, driver: RO */
 354
 355         struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
 356
 357         void *lldd_phy;           /* not touched by the sas_class_code */
 358 };
 359
 360 struct scsi_core {
 361         struct Scsi_Host *shost;
 362
 363 };
 364
 365 struct sas_ha_event {
 366         struct sas_work work;
 367         struct sas_ha_struct *ha;
 368 };
 369
 370 static inline struct sas_ha_event *to_sas_ha_event(struct work_struct *work)
 371 {
 372         struct sas_ha_event *ev = container_of(work, typeof(*ev), work.work);
 373
 374         return ev;
 375 }
 376
 377 enum sas_ha_state {
 378         SAS_HA_REGISTERED,
 379         SAS_HA_DRAINING,
 380         SAS_HA_ATA_EH_ACTIVE,
 381         SAS_HA_FROZEN,
 382 };
 383
 384 struct sas_ha_struct {
 385 /* private: */
 386         struct sas_ha_event ha_events[HA_NUM_EVENTS];
 387         unsigned long    pending;
 388
 389         struct list_head  defer_q; /* work queued while draining */
 390         struct mutex      drain_mutex;
 391         unsigned long     state;
 392         spinlock_t        lock;
 393         int               eh_active;
 394         wait_queue_head_t eh_wait_q;
 395         struct list_head  eh_dev_q;
 396
 397         struct mutex disco_mutex;
 398
 399         struct scsi_core core;
 400
 401 /* public: */
 402         char *sas_ha_name;
 403         struct device *dev;       /* should be set */
 404         struct module *lldd_module; /* should be set */
 405
 406         u8 *sas_addr;             /* must be set */
 407         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 408
 409         spinlock_t      phy_port_lock;
 410         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 411         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 412         int             num_phys; /* must be set, gt 0, static */
 413
 414         int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
 415                                 * their siblings when forming wide ports */
 416
 417         /* LLDD calls these to notify the class of an event. */
 418         int (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
 419         int (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 420         int (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 421
 422         void *lldd_ha;            /* not touched by sas class code */
 423
 424         struct list_head eh_done_q;  /* complete via scsi_eh_flush_done_q */
 425         struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
 426 };
 427
 428 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 429
 430 static inline struct domain_device *
 431 starget_to_domain_dev(struct scsi_target *starget) {
 432         return starget->hostdata;
 433 }
 434
 435 static inline struct domain_device *
 436 sdev_to_domain_dev(struct scsi_device *sdev) {
 437         return starget_to_domain_dev(sdev->sdev_target);
 438 }
 439
 440 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
 441 {
 442         return &dev->sata_dev.ap->link.device[0];
 443 }
 444
 445 static inline struct domain_device *
 446 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 447 {
 448         return sdev_to_domain_dev(cmd->device);
 449 }
 450
 451 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 452
 453 /* Before calling a notify event, LLDD should use this function
 454  * when the link is severed (possibly from its tasklet).
 455  * The idea is that the Class only reads those, while the LLDD,
 456  * can R/W these (thus avoiding a race).
 457  */
 458 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 459 {
 460         phy->oob_mode = OOB_NOT_CONNECTED;
 461         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 462 }
 463
 464 static inline unsigned int to_sas_gpio_od(int device, int bit)
 465 {
 466         return 3 * device + bit;
 467 }
 468
 469 static inline void sas_put_local_phy(struct sas_phy *phy)
 470 {
 471         put_device(&phy->dev);
 472 }
 473
 474 #ifdef CONFIG_SCSI_SAS_HOST_SMP
 475 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
 476 #else
 477 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
 478 {
 479         return -1;
 480 }
 481 #endif
 482
 483 /* ---------- Tasks ---------- */
 484 /*
 485       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 486   exec_status          |                     |                       |
 487   ---------------------+---------------------+-----------------------+
 488        SAM_...         |         X           |                       |
 489        DEV_NO_RESPONSE |         X           |           X           |
 490        INTERRUPTED     |         X           |                       |
 491        QUEUE_FULL      |                     |           X           |
 492        DEVICE_UNKNOWN  |                     |           X           |
 493        SG_ERR          |                     |           X           |
 494   ---------------------+---------------------+-----------------------+
 495  */
 496
 497 enum service_response {
 498         SAS_TASK_COMPLETE,
 499         SAS_TASK_UNDELIVERED = -1,
 500 };
 501
 502 enum exec_status {
 503         /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
 504          * them here to silence 'case value not in enumerated type' warnings
 505          */
 506         __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 507
 508         SAS_DEV_NO_RESPONSE = 0x80,
 509         SAS_DATA_UNDERRUN,
 510         SAS_DATA_OVERRUN,
 511         SAS_INTERRUPTED,
 512         SAS_QUEUE_FULL,
 513         SAS_DEVICE_UNKNOWN,
 514         SAS_SG_ERR,
 515         SAS_OPEN_REJECT,
 516         SAS_OPEN_TO,
 517         SAS_PROTO_RESPONSE,
 518         SAS_PHY_DOWN,
 519         SAS_NAK_R_ERR,
 520         SAS_PENDING,
 521         SAS_ABORTED_TASK,
 522 };
 523
 524 /* When a task finishes with a response, the LLDD examines the
 525  * response:
 526  *      - For an ATA task task_status_struct::stat is set to
 527  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 528  * contents of struct ata_task_resp.
 529  *      - For SSP tasks, if no data is present or status/TMF response
 530  * is valid, task_status_struct::stat is set.  If data is present
 531  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 532  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 533  * set to SAM_CHECK_COND.
 534  *
 535  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 536  * for ATA task.
 537  *
 538  * "frame_len" is the total frame length, which could be more or less
 539  * than actually copied.
 540  *
 541  * Tasks ending with response, always set the residual field.
 542  */
 543 struct ata_task_resp {
 544         u16  frame_len;
 545         u8   ending_fis[ATA_RESP_FIS_SIZE];       /* dev to host or data-in */
 546 };
 547
 548 #define SAS_STATUS_BUF_SIZE 96
 549
 550 struct task_status_struct {
 551         enum service_response resp;
 552         enum exec_status      stat;
 553         int  buf_valid_size;
 554
 555         u8   buf[SAS_STATUS_BUF_SIZE];
 556
 557         u32  residual;
 558         enum sas_open_rej_reason open_rej_reason;
 559 };
 560
 561 /* ATA and ATAPI task queuable to a SAS LLDD.
 562  */
 563 struct sas_ata_task {
 564         struct host_to_dev_fis fis;
 565         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 566
 567         u8     retry_count;       /* hardware retry, should be > 0 */
 568
 569         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 570         u8     use_ncq:1;
 571         u8     set_affil_pol:1;
 572         u8     stp_affil_pol:1;
 573
 574         u8     device_control_reg_update:1;
 575 };
 576
 577 struct sas_smp_task {
 578         struct scatterlist smp_req;
 579         struct scatterlist smp_resp;
 580 };
 581
 582 enum task_attribute {
 583         TASK_ATTR_SIMPLE = 0,
 584         TASK_ATTR_HOQ    = 1,
 585         TASK_ATTR_ORDERED= 2,
 586         TASK_ATTR_ACA    = 4,
 587 };
 588
 589 struct sas_ssp_task {
 590         u8     retry_count;       /* hardware retry, should be > 0 */
 591
 592         u8     LUN[8];
 593         u8     enable_first_burst:1;
 594         enum   task_attribute task_attr;
 595         u8     task_prio;
 596         struct scsi_cmnd *cmd;
 597 };
 598
 599 struct sas_task {
 600         struct domain_device *dev;
 601
 602         spinlock_t   task_state_lock;
 603         unsigned     task_state_flags;
 604
 605         enum   sas_protocol      task_proto;
 606
 607         union {
 608                 struct sas_ata_task ata_task;
 609                 struct sas_smp_task smp_task;
 610                 struct sas_ssp_task ssp_task;
 611         };
 612
 613         struct scatterlist *scatter;
 614         int    num_scatter;
 615         u32    total_xfer_len;
 616         u8     data_dir:2;        /* Use PCI_DMA_... */
 617
 618         struct task_status_struct task_status;
 619         void   (*task_done)(struct sas_task *);
 620
 621         void   *lldd_task;        /* for use by LLDDs */
 622         void   *uldd_task;
 623         struct sas_task_slow *slow_task;
 624 };
 625
 626 struct sas_task_slow {
 627         /* standard/extra infrastructure for slow path commands (SMP and
 628          * internal lldd commands
 629          */
 630         struct timer_list     timer;
 631         struct completion     completion;
 632 };
 633
 634 #define SAS_TASK_STATE_PENDING      1
 635 #define SAS_TASK_STATE_DONE         2
 636 #define SAS_TASK_STATE_ABORTED      4
 637 #define SAS_TASK_NEED_DEV_RESET     8
 638 #define SAS_TASK_AT_INITIATOR       16
 639
 640 extern struct sas_task *sas_alloc_task(gfp_t flags);
 641 extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
 642 extern void sas_free_task(struct sas_task *task);
 643
 644 struct sas_domain_function_template {
 645         /* The class calls these to notify the LLDD of an event. */
 646         void (*lldd_port_formed)(struct asd_sas_phy *);
 647         void (*lldd_port_deformed)(struct asd_sas_phy *);
 648
 649         /* The class calls these when a device is found or gone. */
 650         int  (*lldd_dev_found)(struct domain_device *);
 651         void (*lldd_dev_gone)(struct domain_device *);
 652
 653         int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
 654
 655         /* Task Management Functions. Must be called from process context. */
 656         int (*lldd_abort_task)(struct sas_task *);
 657         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 658         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 659         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 660         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 661         int (*lldd_ata_check_ready)(struct domain_device *);
 662         void (*lldd_ata_set_dmamode)(struct domain_device *);
 663         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 664         int (*lldd_query_task)(struct sas_task *);
 665
 666         /* Port and Adapter management */
 667         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 668         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 669
 670         /* Phy management */
 671         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 672
 673         /* GPIO support */
 674         int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
 675                                u8 reg_index, u8 reg_count, u8 *write_data);
 676 };
 677
 678 extern int sas_register_ha(struct sas_ha_struct *);
 679 extern int sas_unregister_ha(struct sas_ha_struct *);
 680 extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
 681 extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
 682 extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
 683
 684 int sas_set_phy_speed(struct sas_phy *phy,
 685                       struct sas_phy_linkrates *rates);
 686 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
 687 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
 688 extern int sas_target_alloc(struct scsi_target *);
 689 extern int sas_slave_configure(struct scsi_device *);
 690 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
 691 extern int sas_bios_param(struct scsi_device *,
 692                           struct block_device *,
 693                           sector_t capacity, int *hsc);
 694 extern struct scsi_transport_template *
 695 sas_domain_attach_transport(struct sas_domain_function_template *);
 696
 697 int  sas_discover_root_expander(struct domain_device *);
 698
 699 void sas_init_ex_attr(void);
 700
 701 int  sas_ex_revalidate_domain(struct domain_device *);
 702
 703 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
 704 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 705 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 706
 707 int  sas_discover_sata(struct domain_device *);
 708 int  sas_discover_end_dev(struct domain_device *);
 709
 710 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
 711
 712 void sas_init_dev(struct domain_device *);
 713
 714 void sas_task_abort(struct sas_task *);
 715 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
 716 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 717 int sas_eh_target_reset_handler(struct scsi_cmnd *cmd);
 718
 719 extern void sas_target_destroy(struct scsi_target *);
 720 extern int sas_slave_alloc(struct scsi_device *);
 721 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 722 extern int sas_drain_work(struct sas_ha_struct *ha);
 723
 724 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 725                                   struct ssp_response_iu *iu);
 726 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
 727
 728 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 729
 730 #endif /* _SASLIB_H_ */