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