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 enum ata_command_set {
 165         ATA_COMMAND_SET   = 0,
 166         ATAPI_COMMAND_SET = 1,
 167 };
 168
 169 #define ATA_RESP_FIS_SIZE 24
 170
 171 struct sata_device {
 172         enum   ata_command_set command_set;
 173         struct smp_resp        rps_resp; /* report_phy_sata_resp */
 174         u8     port_no;        /* port number, if this is a PM (Port) */
 175         int    pm_result;
 176
 177         struct ata_port *ap;
 178         struct ata_host ata_host;
 179         u8     fis[ATA_RESP_FIS_SIZE];
 180 };
 181
 182 struct ssp_device {
 183         struct list_head eh_list_node; /* pending a user requested eh action */
 184         struct scsi_lun reset_lun;
 185 };
 186
 187 enum {
 188         SAS_DEV_GONE,
 189         SAS_DEV_FOUND, /* device notified to lldd */
 190         SAS_DEV_DESTROY,
 191         SAS_DEV_EH_PENDING,
 192         SAS_DEV_LU_RESET,
 193         SAS_DEV_RESET,
 194 };
 195
 196 struct domain_device {
 197         spinlock_t done_lock;
 198         enum sas_device_type dev_type;
 199
 200         enum sas_linkrate linkrate;
 201         enum sas_linkrate min_linkrate;
 202         enum sas_linkrate max_linkrate;
 203
 204         int  pathways;
 205
 206         struct domain_device *parent;
 207         struct list_head siblings; /* devices on the same level */
 208         struct asd_sas_port *port;        /* shortcut to root of the tree */
 209         struct sas_phy *phy;
 210
 211         struct list_head dev_list_node;
 212         struct list_head disco_list_node; /* awaiting probe or destruct */
 213
 214         enum sas_protocol    iproto;
 215         enum sas_protocol    tproto;
 216
 217         struct sas_rphy *rphy;
 218
 219         u8  sas_addr[SAS_ADDR_SIZE];
 220         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 221
 222         u8  frame_rcvd[32];
 223
 224         union {
 225                 struct expander_device ex_dev;
 226                 struct sata_device     sata_dev; /* STP & directly attached */
 227                 struct ssp_device      ssp_dev;
 228         };
 229
 230         void *lldd_dev;
 231         unsigned long state;
 232         struct kref kref;
 233 };
 234
 235 struct sas_work {
 236         struct list_head drain_node;
 237         struct work_struct work;
 238 };
 239
 240 static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
 241 {
 242         INIT_WORK(&sw->work, fn);
 243         INIT_LIST_HEAD(&sw->drain_node);
 244 }
 245
 246 struct sas_discovery_event {
 247         struct sas_work work;
 248         struct asd_sas_port *port;
 249 };
 250
 251 static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
 252 {
 253         struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
 254
 255         return ev;
 256 }
 257
 258 struct sas_discovery {
 259         struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
 260         unsigned long    pending;
 261         u8     fanout_sas_addr[8];
 262         u8     eeds_a[8];
 263         u8     eeds_b[8];
 264         int    max_level;
 265 };
 266
 267 /* The port struct is Class:RW, driver:RO */
 268 struct asd_sas_port {
 269 /* private: */
 270         struct completion port_gone_completion;
 271
 272         struct sas_discovery disc;
 273         struct domain_device *port_dev;
 274         spinlock_t dev_list_lock;
 275         struct list_head dev_list;
 276         struct list_head disco_list;
 277         struct list_head destroy_list;
 278         enum   sas_linkrate linkrate;
 279
 280         struct sas_work work;
 281         int suspended;
 282
 283 /* public: */
 284         int id;
 285
 286         enum sas_class   class;
 287         u8               sas_addr[SAS_ADDR_SIZE];
 288         u8               attached_sas_addr[SAS_ADDR_SIZE];
 289         enum sas_protocol   iproto;
 290         enum sas_protocol   tproto;
 291
 292         enum sas_oob_mode oob_mode;
 293
 294         spinlock_t       phy_list_lock;
 295         struct list_head phy_list;
 296         int              num_phys;
 297         u32              phy_mask;
 298
 299         struct sas_ha_struct *ha;
 300
 301         struct sas_port *port;
 302
 303         void *lldd_port;          /* not touched by the sas class code */
 304 };
 305
 306 struct asd_sas_event {
 307         struct sas_work work;
 308         struct asd_sas_phy *phy;
 309 };
 310
 311 static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
 312 {
 313         struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
 314
 315         return ev;
 316 }
 317
 318 /* The phy pretty much is controlled by the LLDD.
 319  * The class only reads those fields.
 320  */
 321 struct asd_sas_phy {
 322 /* private: */
 323         struct asd_sas_event   port_events[PORT_NUM_EVENTS];
 324         struct asd_sas_event   phy_events[PHY_NUM_EVENTS];
 325
 326         unsigned long port_events_pending;
 327         unsigned long phy_events_pending;
 328
 329         int error;
 330         int suspended;
 331
 332         struct sas_phy *phy;
 333
 334 /* public: */
 335         /* The following are class:RO, driver:R/W */
 336         int            enabled;   /* must be set */
 337
 338         int            id;        /* must be set */
 339         enum sas_class class;
 340         enum sas_protocol iproto;
 341         enum sas_protocol tproto;
 342
 343         enum sas_phy_type  type;
 344         enum sas_phy_role  role;
 345         enum sas_oob_mode  oob_mode;
 346         enum sas_linkrate linkrate;
 347
 348         u8   *sas_addr;           /* must be set */
 349         u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
 350
 351         spinlock_t     frame_rcvd_lock;
 352         u8             *frame_rcvd; /* must be set */
 353         int            frame_rcvd_size;
 354
 355         spinlock_t     sas_prim_lock;
 356         u32            sas_prim;
 357
 358         struct list_head port_phy_el; /* driver:RO */
 359         struct asd_sas_port      *port; /* Class:RW, driver: RO */
 360
 361         struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
 362
 363         void *lldd_phy;           /* not touched by the sas_class_code */
 364 };
 365
 366 struct scsi_core {
 367         struct Scsi_Host *shost;
 368
 369         struct mutex      task_queue_flush;
 370         spinlock_t        task_queue_lock;
 371         struct list_head  task_queue;
 372         int               task_queue_size;
 373
 374         struct task_struct *queue_thread;
 375 };
 376
 377 struct sas_ha_event {
 378         struct sas_work work;
 379         struct sas_ha_struct *ha;
 380 };
 381
 382 static inline struct sas_ha_event *to_sas_ha_event(struct work_struct *work)
 383 {
 384         struct sas_ha_event *ev = container_of(work, typeof(*ev), work.work);
 385
 386         return ev;
 387 }
 388
 389 enum sas_ha_state {
 390         SAS_HA_REGISTERED,
 391         SAS_HA_DRAINING,
 392         SAS_HA_ATA_EH_ACTIVE,
 393         SAS_HA_FROZEN,
 394 };
 395
 396 struct sas_ha_struct {
 397 /* private: */
 398         struct sas_ha_event ha_events[HA_NUM_EVENTS];
 399         unsigned long    pending;
 400
 401         struct list_head  defer_q; /* work queued while draining */
 402         struct mutex      drain_mutex;
 403         unsigned long     state;
 404         spinlock_t        lock;
 405         int               eh_active;
 406         wait_queue_head_t eh_wait_q;
 407         struct list_head  eh_dev_q;
 408
 409         struct mutex disco_mutex;
 410
 411         struct scsi_core core;
 412
 413 /* public: */
 414         char *sas_ha_name;
 415         struct device *dev;       /* should be set */
 416         struct module *lldd_module; /* should be set */
 417
 418         u8 *sas_addr;             /* must be set */
 419         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 420
 421         spinlock_t      phy_port_lock;
 422         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 423         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 424         int             num_phys; /* must be set, gt 0, static */
 425
 426         /* The class calls this to send a task for execution. */
 427         int lldd_max_execute_num;
 428         int lldd_queue_size;
 429         int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
 430                                 * their siblings when forming wide ports */
 431
 432         /* LLDD calls these to notify the class of an event. */
 433         void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
 434         void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 435         void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 436
 437         void *lldd_ha;            /* not touched by sas class code */
 438
 439         struct list_head eh_done_q;  /* complete via scsi_eh_flush_done_q */
 440         struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
 441 };
 442
 443 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 444
 445 static inline struct domain_device *
 446 starget_to_domain_dev(struct scsi_target *starget) {
 447         return starget->hostdata;
 448 }
 449
 450 static inline struct domain_device *
 451 sdev_to_domain_dev(struct scsi_device *sdev) {
 452         return starget_to_domain_dev(sdev->sdev_target);
 453 }
 454
 455 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
 456 {
 457         return &dev->sata_dev.ap->link.device[0];
 458 }
 459
 460 static inline struct domain_device *
 461 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 462 {
 463         return sdev_to_domain_dev(cmd->device);
 464 }
 465
 466 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 467
 468 /* Before calling a notify event, LLDD should use this function
 469  * when the link is severed (possibly from its tasklet).
 470  * The idea is that the Class only reads those, while the LLDD,
 471  * can R/W these (thus avoiding a race).
 472  */
 473 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 474 {
 475         phy->oob_mode = OOB_NOT_CONNECTED;
 476         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 477 }
 478
 479 static inline unsigned int to_sas_gpio_od(int device, int bit)
 480 {
 481         return 3 * device + bit;
 482 }
 483
 484 static inline void sas_put_local_phy(struct sas_phy *phy)
 485 {
 486         put_device(&phy->dev);
 487 }
 488
 489 #ifdef CONFIG_SCSI_SAS_HOST_SMP
 490 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
 491 #else
 492 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
 493 {
 494         return -1;
 495 }
 496 #endif
 497
 498 /* ---------- Tasks ---------- */
 499 /*
 500       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 501   exec_status          |                     |                       |
 502   ---------------------+---------------------+-----------------------+
 503        SAM_...         |         X           |                       |
 504        DEV_NO_RESPONSE |         X           |           X           |
 505        INTERRUPTED     |         X           |                       |
 506        QUEUE_FULL      |                     |           X           |
 507        DEVICE_UNKNOWN  |                     |           X           |
 508        SG_ERR          |                     |           X           |
 509   ---------------------+---------------------+-----------------------+
 510  */
 511
 512 enum service_response {
 513         SAS_TASK_COMPLETE,
 514         SAS_TASK_UNDELIVERED = -1,
 515 };
 516
 517 enum exec_status {
 518         /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
 519          * them here to silence 'case value not in enumerated type' warnings
 520          */
 521         __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 522
 523         SAS_DEV_NO_RESPONSE = 0x80,
 524         SAS_DATA_UNDERRUN,
 525         SAS_DATA_OVERRUN,
 526         SAS_INTERRUPTED,
 527         SAS_QUEUE_FULL,
 528         SAS_DEVICE_UNKNOWN,
 529         SAS_SG_ERR,
 530         SAS_OPEN_REJECT,
 531         SAS_OPEN_TO,
 532         SAS_PROTO_RESPONSE,
 533         SAS_PHY_DOWN,
 534         SAS_NAK_R_ERR,
 535         SAS_PENDING,
 536         SAS_ABORTED_TASK,
 537 };
 538
 539 /* When a task finishes with a response, the LLDD examines the
 540  * response:
 541  *      - For an ATA task task_status_struct::stat is set to
 542  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 543  * contents of struct ata_task_resp.
 544  *      - For SSP tasks, if no data is present or status/TMF response
 545  * is valid, task_status_struct::stat is set.  If data is present
 546  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 547  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 548  * set to SAM_CHECK_COND.
 549  *
 550  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 551  * for ATA task.
 552  *
 553  * "frame_len" is the total frame length, which could be more or less
 554  * than actually copied.
 555  *
 556  * Tasks ending with response, always set the residual field.
 557  */
 558 struct ata_task_resp {
 559         u16  frame_len;
 560         u8   ending_fis[ATA_RESP_FIS_SIZE];       /* dev to host or data-in */
 561 };
 562
 563 #define SAS_STATUS_BUF_SIZE 96
 564
 565 struct task_status_struct {
 566         enum service_response resp;
 567         enum exec_status      stat;
 568         int  buf_valid_size;
 569
 570         u8   buf[SAS_STATUS_BUF_SIZE];
 571
 572         u32  residual;
 573         enum sas_open_rej_reason open_rej_reason;
 574 };
 575
 576 /* ATA and ATAPI task queuable to a SAS LLDD.
 577  */
 578 struct sas_ata_task {
 579         struct host_to_dev_fis fis;
 580         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 581
 582         u8     retry_count;       /* hardware retry, should be > 0 */
 583
 584         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 585         u8     use_ncq:1;
 586         u8     set_affil_pol:1;
 587         u8     stp_affil_pol:1;
 588
 589         u8     device_control_reg_update:1;
 590 };
 591
 592 struct sas_smp_task {
 593         struct scatterlist smp_req;
 594         struct scatterlist smp_resp;
 595 };
 596
 597 enum task_attribute {
 598         TASK_ATTR_SIMPLE = 0,
 599         TASK_ATTR_HOQ    = 1,
 600         TASK_ATTR_ORDERED= 2,
 601         TASK_ATTR_ACA    = 4,
 602 };
 603
 604 struct sas_ssp_task {
 605         u8     retry_count;       /* hardware retry, should be > 0 */
 606
 607         u8     LUN[8];
 608         u8     enable_first_burst:1;
 609         enum   task_attribute task_attr;
 610         u8     task_prio;
 611         u8     cdb[16];
 612 };
 613
 614 struct sas_task {
 615         struct domain_device *dev;
 616         struct list_head      list;
 617
 618         spinlock_t   task_state_lock;
 619         unsigned     task_state_flags;
 620
 621         enum   sas_protocol      task_proto;
 622
 623         union {
 624                 struct sas_ata_task ata_task;
 625                 struct sas_smp_task smp_task;
 626                 struct sas_ssp_task ssp_task;
 627         };
 628
 629         struct scatterlist *scatter;
 630         int    num_scatter;
 631         u32    total_xfer_len;
 632         u8     data_dir:2;        /* Use PCI_DMA_... */
 633
 634         struct task_status_struct task_status;
 635         void   (*task_done)(struct sas_task *);
 636
 637         void   *lldd_task;        /* for use by LLDDs */
 638         void   *uldd_task;
 639         struct sas_task_slow *slow_task;
 640 };
 641
 642 struct sas_task_slow {
 643         /* standard/extra infrastructure for slow path commands (SMP and
 644          * internal lldd commands
 645          */
 646         struct timer_list     timer;
 647         struct completion     completion;
 648 };
 649
 650 #define SAS_TASK_STATE_PENDING      1
 651 #define SAS_TASK_STATE_DONE         2
 652 #define SAS_TASK_STATE_ABORTED      4
 653 #define SAS_TASK_NEED_DEV_RESET     8
 654 #define SAS_TASK_AT_INITIATOR       16
 655
 656 extern struct sas_task *sas_alloc_task(gfp_t flags);
 657 extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
 658 extern void sas_free_task(struct sas_task *task);
 659
 660 struct sas_domain_function_template {
 661         /* The class calls these to notify the LLDD of an event. */
 662         void (*lldd_port_formed)(struct asd_sas_phy *);
 663         void (*lldd_port_deformed)(struct asd_sas_phy *);
 664
 665         /* The class calls these when a device is found or gone. */
 666         int  (*lldd_dev_found)(struct domain_device *);
 667         void (*lldd_dev_gone)(struct domain_device *);
 668
 669         int (*lldd_execute_task)(struct sas_task *, int num,
 670                                  gfp_t gfp_flags);
 671
 672         /* Task Management Functions. Must be called from process context. */
 673         int (*lldd_abort_task)(struct sas_task *);
 674         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 675         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 676         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 677         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 678         int (*lldd_ata_check_ready)(struct domain_device *);
 679         void (*lldd_ata_set_dmamode)(struct domain_device *);
 680         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 681         int (*lldd_query_task)(struct sas_task *);
 682
 683         /* Port and Adapter management */
 684         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 685         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 686
 687         /* Phy management */
 688         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 689
 690         /* GPIO support */
 691         int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
 692                                u8 reg_index, u8 reg_count, u8 *write_data);
 693 };
 694
 695 extern int sas_register_ha(struct sas_ha_struct *);
 696 extern int sas_unregister_ha(struct sas_ha_struct *);
 697 extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
 698 extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
 699 extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
 700
 701 int sas_set_phy_speed(struct sas_phy *phy,
 702                       struct sas_phy_linkrates *rates);
 703 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
 704 int sas_queue_up(struct sas_task *task);
 705 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
 706 extern int sas_target_alloc(struct scsi_target *);
 707 extern int sas_slave_configure(struct scsi_device *);
 708 extern int sas_change_queue_depth(struct scsi_device *, int new_depth,
 709                                   int reason);
 710 extern int sas_change_queue_type(struct scsi_device *, int qt);
 711 extern int sas_bios_param(struct scsi_device *,
 712                           struct block_device *,
 713                           sector_t capacity, int *hsc);
 714 extern struct scsi_transport_template *
 715 sas_domain_attach_transport(struct sas_domain_function_template *);
 716 extern void sas_domain_release_transport(struct scsi_transport_template *);
 717
 718 int  sas_discover_root_expander(struct domain_device *);
 719
 720 void sas_init_ex_attr(void);
 721
 722 int  sas_ex_revalidate_domain(struct domain_device *);
 723
 724 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
 725 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 726 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 727
 728 int  sas_discover_sata(struct domain_device *);
 729 int  sas_discover_end_dev(struct domain_device *);
 730
 731 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
 732
 733 void sas_init_dev(struct domain_device *);
 734
 735 void sas_task_abort(struct sas_task *);
 736 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
 737 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 738 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
 739
 740 extern void sas_target_destroy(struct scsi_target *);
 741 extern int sas_slave_alloc(struct scsi_device *);
 742 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 743 extern int sas_drain_work(struct sas_ha_struct *ha);
 744
 745 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
 746                            struct request *req);
 747
 748 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 749                                   struct ssp_response_iu *iu);
 750 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
 751
 752 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 753
 754 #endif /* _SASLIB_H_ */