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         PHYE_SHUTDOWN,
  79         PHY_NUM_EVENTS,
  80 };
  81
  82 enum discover_event {
  83         DISCE_DISCOVER_DOMAIN   = 0U,
  84         DISCE_REVALIDATE_DOMAIN,
  85         DISCE_SUSPEND,
  86         DISCE_RESUME,
  87         DISC_NUM_EVENTS,
  88 };
  89
  90 /* ---------- Expander Devices ---------- */
  91
  92 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
  93 #define to_dev_attr(_attr)  container_of(_attr, struct domain_dev_attribute,\
  94                                          attr)
  95
  96 enum routing_attribute {
  97         DIRECT_ROUTING,
  98         SUBTRACTIVE_ROUTING,
  99         TABLE_ROUTING,
 100 };
 101
 102 enum ex_phy_state {
 103         PHY_EMPTY,
 104         PHY_VACANT,
 105         PHY_NOT_PRESENT,
 106         PHY_DEVICE_DISCOVERED
 107 };
 108
 109 struct ex_phy {
 110         int    phy_id;
 111
 112         enum ex_phy_state phy_state;
 113
 114         enum sas_device_type attached_dev_type;
 115         enum sas_linkrate linkrate;
 116
 117         u8   attached_sata_host:1;
 118         u8   attached_sata_dev:1;
 119         u8   attached_sata_ps:1;
 120
 121         enum sas_protocol attached_tproto;
 122         enum sas_protocol attached_iproto;
 123
 124         u8   attached_sas_addr[SAS_ADDR_SIZE];
 125         u8   attached_phy_id;
 126
 127         int phy_change_count;
 128         enum routing_attribute routing_attr;
 129         u8   virtual:1;
 130
 131         int  last_da_index;
 132
 133         struct sas_phy *phy;
 134         struct sas_port *port;
 135 };
 136
 137 struct expander_device {
 138         struct list_head children;
 139
 140         int    ex_change_count;
 141         u16    max_route_indexes;
 142         u8     num_phys;
 143
 144         u8     t2t_supp:1;
 145         u8     configuring:1;
 146         u8     conf_route_table:1;
 147
 148         u8     enclosure_logical_id[8];
 149
 150         struct ex_phy *ex_phy;
 151         struct sas_port *parent_port;
 152
 153         struct mutex cmd_mutex;
 154 };
 155
 156 /* ---------- SATA device ---------- */
 157 #define ATA_RESP_FIS_SIZE 24
 158
 159 struct sata_device {
 160         unsigned int class;
 161         u8     port_no;        /* port number, if this is a PM (Port) */
 162
 163         struct ata_port *ap;
 164         struct ata_host *ata_host;
 165         struct smp_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */
 166         u8     fis[ATA_RESP_FIS_SIZE];
 167 };
 168
 169 struct ssp_device {
 170         struct list_head eh_list_node; /* pending a user requested eh action */
 171         struct scsi_lun reset_lun;
 172 };
 173
 174 enum {
 175         SAS_DEV_GONE,
 176         SAS_DEV_FOUND, /* device notified to lldd */
 177         SAS_DEV_DESTROY,
 178         SAS_DEV_EH_PENDING,
 179         SAS_DEV_LU_RESET,
 180         SAS_DEV_RESET,
 181 };
 182
 183 struct domain_device {
 184         spinlock_t done_lock;
 185         enum sas_device_type dev_type;
 186
 187         enum sas_linkrate linkrate;
 188         enum sas_linkrate min_linkrate;
 189         enum sas_linkrate max_linkrate;
 190
 191         int  pathways;
 192
 193         struct domain_device *parent;
 194         struct list_head siblings; /* devices on the same level */
 195         struct asd_sas_port *port;        /* shortcut to root of the tree */
 196         struct sas_phy *phy;
 197
 198         struct list_head dev_list_node;
 199         struct list_head disco_list_node; /* awaiting probe or destruct */
 200
 201         enum sas_protocol    iproto;
 202         enum sas_protocol    tproto;
 203
 204         struct sas_rphy *rphy;
 205
 206         u8  sas_addr[SAS_ADDR_SIZE];
 207         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 208
 209         u8  frame_rcvd[32];
 210
 211         union {
 212                 struct expander_device ex_dev;
 213                 struct sata_device     sata_dev; /* STP & directly attached */
 214                 struct ssp_device      ssp_dev;
 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 sas_discovery disc;
 258         struct domain_device *port_dev;
 259         spinlock_t dev_list_lock;
 260         struct list_head dev_list;
 261         struct list_head disco_list;
 262         struct list_head destroy_list;
 263         struct list_head sas_port_del_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         int event;
 296 };
 297
 298 static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
 299 {
 300         struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
 301
 302         return ev;
 303 }
 304
 305 static inline void INIT_SAS_EVENT(struct asd_sas_event *ev,
 306                 void (*fn)(struct work_struct *),
 307                 struct asd_sas_phy *phy, int event)
 308 {
 309         INIT_SAS_WORK(&ev->work, fn);
 310         ev->phy = phy;
 311         ev->event = event;
 312 }
 313
 314 #define SAS_PHY_SHUTDOWN_THRES   1024
 315
 316 /* The phy pretty much is controlled by the LLDD.
 317  * The class only reads those fields.
 318  */
 319 struct asd_sas_phy {
 320 /* private: */
 321         atomic_t event_nr;
 322         int in_shutdown;
 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 enum sas_ha_state {
 366         SAS_HA_REGISTERED,
 367         SAS_HA_DRAINING,
 368         SAS_HA_ATA_EH_ACTIVE,
 369         SAS_HA_FROZEN,
 370 };
 371
 372 struct sas_ha_struct {
 373 /* private: */
 374         struct list_head  defer_q; /* work queued while draining */
 375         struct mutex      drain_mutex;
 376         unsigned long     state;
 377         spinlock_t        lock;
 378         int               eh_active;
 379         wait_queue_head_t eh_wait_q;
 380         struct list_head  eh_dev_q;
 381
 382         struct mutex disco_mutex;
 383
 384         struct scsi_core core;
 385
 386 /* public: */
 387         char *sas_ha_name;
 388         struct device *dev;       /* should be set */
 389         struct module *lldd_module; /* should be set */
 390
 391         struct workqueue_struct *event_q;
 392         struct workqueue_struct *disco_q;
 393
 394         u8 *sas_addr;             /* must be set */
 395         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 396
 397         spinlock_t      phy_port_lock;
 398         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 399         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 400         int             num_phys; /* must be set, gt 0, static */
 401
 402         int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
 403                                 * their siblings when forming wide ports */
 404
 405         /* LLDD calls these to notify the class of an event. */
 406         int (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 407         int (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 408
 409         void *lldd_ha;            /* not touched by sas class code */
 410
 411         struct list_head eh_done_q;  /* complete via scsi_eh_flush_done_q */
 412         struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
 413
 414         int event_thres;
 415 };
 416
 417 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 418
 419 static inline struct domain_device *
 420 starget_to_domain_dev(struct scsi_target *starget) {
 421         return starget->hostdata;
 422 }
 423
 424 static inline struct domain_device *
 425 sdev_to_domain_dev(struct scsi_device *sdev) {
 426         return starget_to_domain_dev(sdev->sdev_target);
 427 }
 428
 429 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
 430 {
 431         return &dev->sata_dev.ap->link.device[0];
 432 }
 433
 434 static inline struct domain_device *
 435 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 436 {
 437         return sdev_to_domain_dev(cmd->device);
 438 }
 439
 440 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 441
 442 /* Before calling a notify event, LLDD should use this function
 443  * when the link is severed (possibly from its tasklet).
 444  * The idea is that the Class only reads those, while the LLDD,
 445  * can R/W these (thus avoiding a race).
 446  */
 447 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 448 {
 449         phy->oob_mode = OOB_NOT_CONNECTED;
 450         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 451 }
 452
 453 static inline unsigned int to_sas_gpio_od(int device, int bit)
 454 {
 455         return 3 * device + bit;
 456 }
 457
 458 static inline void sas_put_local_phy(struct sas_phy *phy)
 459 {
 460         put_device(&phy->dev);
 461 }
 462
 463 #ifdef CONFIG_SCSI_SAS_HOST_SMP
 464 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
 465 #else
 466 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
 467 {
 468         return -1;
 469 }
 470 #endif
 471
 472 /* ---------- Tasks ---------- */
 473 /*
 474       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 475   exec_status          |                     |                       |
 476   ---------------------+---------------------+-----------------------+
 477        SAM_...         |         X           |                       |
 478        DEV_NO_RESPONSE |         X           |           X           |
 479        INTERRUPTED     |         X           |                       |
 480        QUEUE_FULL      |                     |           X           |
 481        DEVICE_UNKNOWN  |                     |           X           |
 482        SG_ERR          |                     |           X           |
 483   ---------------------+---------------------+-----------------------+
 484  */
 485
 486 enum service_response {
 487         SAS_TASK_COMPLETE,
 488         SAS_TASK_UNDELIVERED = -1,
 489 };
 490
 491 enum exec_status {
 492         /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
 493          * them here to silence 'case value not in enumerated type' warnings
 494          */
 495         __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 496
 497         SAS_DEV_NO_RESPONSE = 0x80,
 498         SAS_DATA_UNDERRUN,
 499         SAS_DATA_OVERRUN,
 500         SAS_INTERRUPTED,
 501         SAS_QUEUE_FULL,
 502         SAS_DEVICE_UNKNOWN,
 503         SAS_SG_ERR,
 504         SAS_OPEN_REJECT,
 505         SAS_OPEN_TO,
 506         SAS_PROTO_RESPONSE,
 507         SAS_PHY_DOWN,
 508         SAS_NAK_R_ERR,
 509         SAS_PENDING,
 510         SAS_ABORTED_TASK,
 511 };
 512
 513 /* When a task finishes with a response, the LLDD examines the
 514  * response:
 515  *      - For an ATA task task_status_struct::stat is set to
 516  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 517  * contents of struct ata_task_resp.
 518  *      - For SSP tasks, if no data is present or status/TMF response
 519  * is valid, task_status_struct::stat is set.  If data is present
 520  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 521  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 522  * set to SAM_CHECK_COND.
 523  *
 524  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 525  * for ATA task.
 526  *
 527  * "frame_len" is the total frame length, which could be more or less
 528  * than actually copied.
 529  *
 530  * Tasks ending with response, always set the residual field.
 531  */
 532 struct ata_task_resp {
 533         u16  frame_len;
 534         u8   ending_fis[ATA_RESP_FIS_SIZE];       /* dev to host or data-in */
 535 };
 536
 537 #define SAS_STATUS_BUF_SIZE 96
 538
 539 struct task_status_struct {
 540         enum service_response resp;
 541         enum exec_status      stat;
 542         int  buf_valid_size;
 543
 544         u8   buf[SAS_STATUS_BUF_SIZE];
 545
 546         u32  residual;
 547         enum sas_open_rej_reason open_rej_reason;
 548 };
 549
 550 /* ATA and ATAPI task queuable to a SAS LLDD.
 551  */
 552 struct sas_ata_task {
 553         struct host_to_dev_fis fis;
 554         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 555
 556         u8     retry_count;       /* hardware retry, should be > 0 */
 557
 558         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 559         u8     use_ncq:1;
 560         u8     set_affil_pol:1;
 561         u8     stp_affil_pol:1;
 562
 563         u8     device_control_reg_update:1;
 564 };
 565
 566 struct sas_smp_task {
 567         struct scatterlist smp_req;
 568         struct scatterlist smp_resp;
 569 };
 570
 571 enum task_attribute {
 572         TASK_ATTR_SIMPLE = 0,
 573         TASK_ATTR_HOQ    = 1,
 574         TASK_ATTR_ORDERED= 2,
 575         TASK_ATTR_ACA    = 4,
 576 };
 577
 578 struct sas_ssp_task {
 579         u8     retry_count;       /* hardware retry, should be > 0 */
 580
 581         u8     LUN[8];
 582         u8     enable_first_burst:1;
 583         enum   task_attribute task_attr;
 584         u8     task_prio;
 585         struct scsi_cmnd *cmd;
 586 };
 587
 588 struct sas_task {
 589         struct domain_device *dev;
 590
 591         spinlock_t   task_state_lock;
 592         unsigned     task_state_flags;
 593
 594         enum   sas_protocol      task_proto;
 595
 596         union {
 597                 struct sas_ata_task ata_task;
 598                 struct sas_smp_task smp_task;
 599                 struct sas_ssp_task ssp_task;
 600         };
 601
 602         struct scatterlist *scatter;
 603         int    num_scatter;
 604         u32    total_xfer_len;
 605         u8     data_dir:2;        /* Use PCI_DMA_... */
 606
 607         struct task_status_struct task_status;
 608         void   (*task_done)(struct sas_task *);
 609
 610         void   *lldd_task;        /* for use by LLDDs */
 611         void   *uldd_task;
 612         struct sas_task_slow *slow_task;
 613 };
 614
 615 struct sas_task_slow {
 616         /* standard/extra infrastructure for slow path commands (SMP and
 617          * internal lldd commands
 618          */
 619         struct timer_list     timer;
 620         struct completion     completion;
 621         struct sas_task       *task;
 622 };
 623
 624 #define SAS_TASK_STATE_PENDING      1
 625 #define SAS_TASK_STATE_DONE         2
 626 #define SAS_TASK_STATE_ABORTED      4
 627 #define SAS_TASK_NEED_DEV_RESET     8
 628 #define SAS_TASK_AT_INITIATOR       16
 629
 630 extern struct sas_task *sas_alloc_task(gfp_t flags);
 631 extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
 632 extern void sas_free_task(struct sas_task *task);
 633
 634 struct sas_domain_function_template {
 635         /* The class calls these to notify the LLDD of an event. */
 636         void (*lldd_port_formed)(struct asd_sas_phy *);
 637         void (*lldd_port_deformed)(struct asd_sas_phy *);
 638
 639         /* The class calls these when a device is found or gone. */
 640         int  (*lldd_dev_found)(struct domain_device *);
 641         void (*lldd_dev_gone)(struct domain_device *);
 642
 643         int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
 644
 645         /* Task Management Functions. Must be called from process context. */
 646         int (*lldd_abort_task)(struct sas_task *);
 647         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 648         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 649         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 650         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 651         int (*lldd_ata_check_ready)(struct domain_device *);
 652         void (*lldd_ata_set_dmamode)(struct domain_device *);
 653         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 654         int (*lldd_query_task)(struct sas_task *);
 655
 656         /* Port and Adapter management */
 657         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 658         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 659
 660         /* Phy management */
 661         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 662
 663         /* GPIO support */
 664         int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
 665                                u8 reg_index, u8 reg_count, u8 *write_data);
 666 };
 667
 668 extern int sas_register_ha(struct sas_ha_struct *);
 669 extern int sas_unregister_ha(struct sas_ha_struct *);
 670 extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
 671 extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
 672 extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
 673
 674 int sas_set_phy_speed(struct sas_phy *phy,
 675                       struct sas_phy_linkrates *rates);
 676 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
 677 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
 678 extern int sas_target_alloc(struct scsi_target *);
 679 extern int sas_slave_configure(struct scsi_device *);
 680 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
 681 extern int sas_bios_param(struct scsi_device *,
 682                           struct block_device *,
 683                           sector_t capacity, int *hsc);
 684 extern struct scsi_transport_template *
 685 sas_domain_attach_transport(struct sas_domain_function_template *);
 686 extern struct device_attribute dev_attr_phy_event_threshold;
 687
 688 int  sas_discover_root_expander(struct domain_device *);
 689
 690 void sas_init_ex_attr(void);
 691
 692 int  sas_ex_revalidate_domain(struct domain_device *);
 693
 694 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
 695 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 696 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 697
 698 int  sas_discover_sata(struct domain_device *);
 699 int  sas_discover_end_dev(struct domain_device *);
 700
 701 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
 702
 703 void sas_init_dev(struct domain_device *);
 704
 705 void sas_task_abort(struct sas_task *);
 706 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
 707 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 708 int sas_eh_target_reset_handler(struct scsi_cmnd *cmd);
 709
 710 extern void sas_target_destroy(struct scsi_target *);
 711 extern int sas_slave_alloc(struct scsi_device *);
 712 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 713 extern int sas_drain_work(struct sas_ha_struct *ha);
 714
 715 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 716                                   struct ssp_response_iu *iu);
 717 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
 718
 719 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 720
 721 #endif /* _SASLIB_H_ */