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_PROBE,
  86         DISCE_SUSPEND,
  87         DISCE_RESUME,
  88         DISCE_DESTRUCT,
  89         DISC_NUM_EVENTS,
  90 };
  91
  92 /* ---------- Expander Devices ---------- */
  93
  94 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
  95 #define to_dev_attr(_attr)  container_of(_attr, struct domain_dev_attribute,\
  96                                          attr)
  97
  98 enum routing_attribute {
  99         DIRECT_ROUTING,
 100         SUBTRACTIVE_ROUTING,
 101         TABLE_ROUTING,
 102 };
 103
 104 enum ex_phy_state {
 105         PHY_EMPTY,
 106         PHY_VACANT,
 107         PHY_NOT_PRESENT,
 108         PHY_DEVICE_DISCOVERED
 109 };
 110
 111 struct ex_phy {
 112         int    phy_id;
 113
 114         enum ex_phy_state phy_state;
 115
 116         enum sas_device_type attached_dev_type;
 117         enum sas_linkrate linkrate;
 118
 119         u8   attached_sata_host:1;
 120         u8   attached_sata_dev:1;
 121         u8   attached_sata_ps:1;
 122
 123         enum sas_protocol attached_tproto;
 124         enum sas_protocol attached_iproto;
 125
 126         u8   attached_sas_addr[SAS_ADDR_SIZE];
 127         u8   attached_phy_id;
 128
 129         int phy_change_count;
 130         enum routing_attribute routing_attr;
 131         u8   virtual:1;
 132
 133         int  last_da_index;
 134
 135         struct sas_phy *phy;
 136         struct sas_port *port;
 137 };
 138
 139 struct expander_device {
 140         struct list_head children;
 141
 142         int    ex_change_count;
 143         u16    max_route_indexes;
 144         u8     num_phys;
 145
 146         u8     t2t_supp:1;
 147         u8     configuring:1;
 148         u8     conf_route_table:1;
 149
 150         u8     enclosure_logical_id[8];
 151
 152         struct ex_phy *ex_phy;
 153         struct sas_port *parent_port;
 154
 155         struct mutex cmd_mutex;
 156 };
 157
 158 /* ---------- SATA device ---------- */
 159 #define ATA_RESP_FIS_SIZE 24
 160
 161 struct sata_device {
 162         unsigned int class;
 163         u8     port_no;        /* port number, if this is a PM (Port) */
 164
 165         struct ata_port *ap;
 166         struct ata_host ata_host;
 167         struct smp_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */
 168         u8     fis[ATA_RESP_FIS_SIZE];
 169 };
 170
 171 struct ssp_device {
 172         struct list_head eh_list_node; /* pending a user requested eh action */
 173         struct scsi_lun reset_lun;
 174 };
 175
 176 enum {
 177         SAS_DEV_GONE,
 178         SAS_DEV_FOUND, /* device notified to lldd */
 179         SAS_DEV_DESTROY,
 180         SAS_DEV_EH_PENDING,
 181         SAS_DEV_LU_RESET,
 182         SAS_DEV_RESET,
 183 };
 184
 185 struct domain_device {
 186         spinlock_t done_lock;
 187         enum sas_device_type dev_type;
 188
 189         enum sas_linkrate linkrate;
 190         enum sas_linkrate min_linkrate;
 191         enum sas_linkrate max_linkrate;
 192
 193         int  pathways;
 194
 195         struct domain_device *parent;
 196         struct list_head siblings; /* devices on the same level */
 197         struct asd_sas_port *port;        /* shortcut to root of the tree */
 198         struct sas_phy *phy;
 199
 200         struct list_head dev_list_node;
 201         struct list_head disco_list_node; /* awaiting probe or destruct */
 202
 203         enum sas_protocol    iproto;
 204         enum sas_protocol    tproto;
 205
 206         struct sas_rphy *rphy;
 207
 208         u8  sas_addr[SAS_ADDR_SIZE];
 209         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 210
 211         u8  frame_rcvd[32];
 212
 213         union {
 214                 struct expander_device ex_dev;
 215                 struct sata_device     sata_dev; /* STP & directly attached */
 216                 struct ssp_device      ssp_dev;
 217         };
 218
 219         void *lldd_dev;
 220         unsigned long state;
 221         struct kref kref;
 222 };
 223
 224 struct sas_work {
 225         struct list_head drain_node;
 226         struct work_struct work;
 227 };
 228
 229 static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
 230 {
 231         INIT_WORK(&sw->work, fn);
 232         INIT_LIST_HEAD(&sw->drain_node);
 233 }
 234
 235 struct sas_discovery_event {
 236         struct sas_work work;
 237         struct asd_sas_port *port;
 238 };
 239
 240 static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
 241 {
 242         struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
 243
 244         return ev;
 245 }
 246
 247 struct sas_discovery {
 248         struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
 249         unsigned long    pending;
 250         u8     fanout_sas_addr[8];
 251         u8     eeds_a[8];
 252         u8     eeds_b[8];
 253         int    max_level;
 254 };
 255
 256 /* The port struct is Class:RW, driver:RO */
 257 struct asd_sas_port {
 258 /* private: */
 259         struct sas_discovery disc;
 260         struct domain_device *port_dev;
 261         spinlock_t dev_list_lock;
 262         struct list_head dev_list;
 263         struct list_head disco_list;
 264         struct list_head destroy_list;
 265         enum   sas_linkrate linkrate;
 266
 267         struct sas_work work;
 268         int suspended;
 269
 270 /* public: */
 271         int id;
 272
 273         enum sas_class   class;
 274         u8               sas_addr[SAS_ADDR_SIZE];
 275         u8               attached_sas_addr[SAS_ADDR_SIZE];
 276         enum sas_protocol   iproto;
 277         enum sas_protocol   tproto;
 278
 279         enum sas_oob_mode oob_mode;
 280
 281         spinlock_t       phy_list_lock;
 282         struct list_head phy_list;
 283         int              num_phys;
 284         u32              phy_mask;
 285
 286         struct sas_ha_struct *ha;
 287
 288         struct sas_port *port;
 289
 290         void *lldd_port;          /* not touched by the sas class code */
 291 };
 292
 293 struct asd_sas_event {
 294         struct sas_work work;
 295         struct asd_sas_phy *phy;
 296         int event;
 297 };
 298
 299 static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
 300 {
 301         struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
 302
 303         return ev;
 304 }
 305
 306 static inline void INIT_SAS_EVENT(struct asd_sas_event *ev,
 307                 void (*fn)(struct work_struct *),
 308                 struct asd_sas_phy *phy, int event)
 309 {
 310         INIT_SAS_WORK(&ev->work, fn);
 311         ev->phy = phy;
 312         ev->event = event;
 313 }
 314
 315 #define SAS_PHY_SHUTDOWN_THRES   1024
 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         atomic_t event_nr;
 323         int in_shutdown;
 324         int error;
 325         int suspended;
 326
 327         struct sas_phy *phy;
 328
 329 /* public: */
 330         /* The following are class:RO, driver:R/W */
 331         int            enabled;   /* must be set */
 332
 333         int            id;        /* must be set */
 334         enum sas_class class;
 335         enum sas_protocol iproto;
 336         enum sas_protocol tproto;
 337
 338         enum sas_phy_type  type;
 339         enum sas_phy_role  role;
 340         enum sas_oob_mode  oob_mode;
 341         enum sas_linkrate linkrate;
 342
 343         u8   *sas_addr;           /* must be set */
 344         u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
 345
 346         spinlock_t     frame_rcvd_lock;
 347         u8             *frame_rcvd; /* must be set */
 348         int            frame_rcvd_size;
 349
 350         spinlock_t     sas_prim_lock;
 351         u32            sas_prim;
 352
 353         struct list_head port_phy_el; /* driver:RO */
 354         struct asd_sas_port      *port; /* Class:RW, driver: RO */
 355
 356         struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
 357
 358         void *lldd_phy;           /* not touched by the sas_class_code */
 359 };
 360
 361 struct scsi_core {
 362         struct Scsi_Host *shost;
 363
 364 };
 365
 366 enum sas_ha_state {
 367         SAS_HA_REGISTERED,
 368         SAS_HA_DRAINING,
 369         SAS_HA_ATA_EH_ACTIVE,
 370         SAS_HA_FROZEN,
 371 };
 372
 373 struct sas_ha_struct {
 374 /* private: */
 375         struct list_head  defer_q; /* work queued while draining */
 376         struct mutex      drain_mutex;
 377         unsigned long     state;
 378         spinlock_t        lock;
 379         int               eh_active;
 380         wait_queue_head_t eh_wait_q;
 381         struct list_head  eh_dev_q;
 382
 383         struct mutex disco_mutex;
 384
 385         struct scsi_core core;
 386
 387 /* public: */
 388         char *sas_ha_name;
 389         struct device *dev;       /* should be set */
 390         struct module *lldd_module; /* should be set */
 391
 392         u8 *sas_addr;             /* must be set */
 393         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 394
 395         spinlock_t      phy_port_lock;
 396         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 397         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 398         int             num_phys; /* must be set, gt 0, static */
 399
 400         int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
 401                                 * their siblings when forming wide ports */
 402
 403         /* LLDD calls these to notify the class of an event. */
 404         int (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 405         int (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 406
 407         void *lldd_ha;            /* not touched by sas class code */
 408
 409         struct list_head eh_done_q;  /* complete via scsi_eh_flush_done_q */
 410         struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
 411
 412         int event_thres;
 413 };
 414
 415 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 416
 417 static inline struct domain_device *
 418 starget_to_domain_dev(struct scsi_target *starget) {
 419         return starget->hostdata;
 420 }
 421
 422 static inline struct domain_device *
 423 sdev_to_domain_dev(struct scsi_device *sdev) {
 424         return starget_to_domain_dev(sdev->sdev_target);
 425 }
 426
 427 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
 428 {
 429         return &dev->sata_dev.ap->link.device[0];
 430 }
 431
 432 static inline struct domain_device *
 433 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 434 {
 435         return sdev_to_domain_dev(cmd->device);
 436 }
 437
 438 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 439
 440 /* Before calling a notify event, LLDD should use this function
 441  * when the link is severed (possibly from its tasklet).
 442  * The idea is that the Class only reads those, while the LLDD,
 443  * can R/W these (thus avoiding a race).
 444  */
 445 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 446 {
 447         phy->oob_mode = OOB_NOT_CONNECTED;
 448         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 449 }
 450
 451 static inline unsigned int to_sas_gpio_od(int device, int bit)
 452 {
 453         return 3 * device + bit;
 454 }
 455
 456 static inline void sas_put_local_phy(struct sas_phy *phy)
 457 {
 458         put_device(&phy->dev);
 459 }
 460
 461 #ifdef CONFIG_SCSI_SAS_HOST_SMP
 462 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
 463 #else
 464 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
 465 {
 466         return -1;
 467 }
 468 #endif
 469
 470 /* ---------- Tasks ---------- */
 471 /*
 472       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 473   exec_status          |                     |                       |
 474   ---------------------+---------------------+-----------------------+
 475        SAM_...         |         X           |                       |
 476        DEV_NO_RESPONSE |         X           |           X           |
 477        INTERRUPTED     |         X           |                       |
 478        QUEUE_FULL      |                     |           X           |
 479        DEVICE_UNKNOWN  |                     |           X           |
 480        SG_ERR          |                     |           X           |
 481   ---------------------+---------------------+-----------------------+
 482  */
 483
 484 enum service_response {
 485         SAS_TASK_COMPLETE,
 486         SAS_TASK_UNDELIVERED = -1,
 487 };
 488
 489 enum exec_status {
 490         /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
 491          * them here to silence 'case value not in enumerated type' warnings
 492          */
 493         __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 494
 495         SAS_DEV_NO_RESPONSE = 0x80,
 496         SAS_DATA_UNDERRUN,
 497         SAS_DATA_OVERRUN,
 498         SAS_INTERRUPTED,
 499         SAS_QUEUE_FULL,
 500         SAS_DEVICE_UNKNOWN,
 501         SAS_SG_ERR,
 502         SAS_OPEN_REJECT,
 503         SAS_OPEN_TO,
 504         SAS_PROTO_RESPONSE,
 505         SAS_PHY_DOWN,
 506         SAS_NAK_R_ERR,
 507         SAS_PENDING,
 508         SAS_ABORTED_TASK,
 509 };
 510
 511 /* When a task finishes with a response, the LLDD examines the
 512  * response:
 513  *      - For an ATA task task_status_struct::stat is set to
 514  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 515  * contents of struct ata_task_resp.
 516  *      - For SSP tasks, if no data is present or status/TMF response
 517  * is valid, task_status_struct::stat is set.  If data is present
 518  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 519  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 520  * set to SAM_CHECK_COND.
 521  *
 522  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 523  * for ATA task.
 524  *
 525  * "frame_len" is the total frame length, which could be more or less
 526  * than actually copied.
 527  *
 528  * Tasks ending with response, always set the residual field.
 529  */
 530 struct ata_task_resp {
 531         u16  frame_len;
 532         u8   ending_fis[ATA_RESP_FIS_SIZE];       /* dev to host or data-in */
 533 };
 534
 535 #define SAS_STATUS_BUF_SIZE 96
 536
 537 struct task_status_struct {
 538         enum service_response resp;
 539         enum exec_status      stat;
 540         int  buf_valid_size;
 541
 542         u8   buf[SAS_STATUS_BUF_SIZE];
 543
 544         u32  residual;
 545         enum sas_open_rej_reason open_rej_reason;
 546 };
 547
 548 /* ATA and ATAPI task queuable to a SAS LLDD.
 549  */
 550 struct sas_ata_task {
 551         struct host_to_dev_fis fis;
 552         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 553
 554         u8     retry_count;       /* hardware retry, should be > 0 */
 555
 556         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 557         u8     use_ncq:1;
 558         u8     set_affil_pol:1;
 559         u8     stp_affil_pol:1;
 560
 561         u8     device_control_reg_update:1;
 562 };
 563
 564 struct sas_smp_task {
 565         struct scatterlist smp_req;
 566         struct scatterlist smp_resp;
 567 };
 568
 569 enum task_attribute {
 570         TASK_ATTR_SIMPLE = 0,
 571         TASK_ATTR_HOQ    = 1,
 572         TASK_ATTR_ORDERED= 2,
 573         TASK_ATTR_ACA    = 4,
 574 };
 575
 576 struct sas_ssp_task {
 577         u8     retry_count;       /* hardware retry, should be > 0 */
 578
 579         u8     LUN[8];
 580         u8     enable_first_burst:1;
 581         enum   task_attribute task_attr;
 582         u8     task_prio;
 583         struct scsi_cmnd *cmd;
 584 };
 585
 586 struct sas_task {
 587         struct domain_device *dev;
 588
 589         spinlock_t   task_state_lock;
 590         unsigned     task_state_flags;
 591
 592         enum   sas_protocol      task_proto;
 593
 594         union {
 595                 struct sas_ata_task ata_task;
 596                 struct sas_smp_task smp_task;
 597                 struct sas_ssp_task ssp_task;
 598         };
 599
 600         struct scatterlist *scatter;
 601         int    num_scatter;
 602         u32    total_xfer_len;
 603         u8     data_dir:2;        /* Use PCI_DMA_... */
 604
 605         struct task_status_struct task_status;
 606         void   (*task_done)(struct sas_task *);
 607
 608         void   *lldd_task;        /* for use by LLDDs */
 609         void   *uldd_task;
 610         struct sas_task_slow *slow_task;
 611 };
 612
 613 struct sas_task_slow {
 614         /* standard/extra infrastructure for slow path commands (SMP and
 615          * internal lldd commands
 616          */
 617         struct timer_list     timer;
 618         struct completion     completion;
 619         struct sas_task       *task;
 620 };
 621
 622 #define SAS_TASK_STATE_PENDING      1
 623 #define SAS_TASK_STATE_DONE         2
 624 #define SAS_TASK_STATE_ABORTED      4
 625 #define SAS_TASK_NEED_DEV_RESET     8
 626 #define SAS_TASK_AT_INITIATOR       16
 627
 628 extern struct sas_task *sas_alloc_task(gfp_t flags);
 629 extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
 630 extern void sas_free_task(struct sas_task *task);
 631
 632 struct sas_domain_function_template {
 633         /* The class calls these to notify the LLDD of an event. */
 634         void (*lldd_port_formed)(struct asd_sas_phy *);
 635         void (*lldd_port_deformed)(struct asd_sas_phy *);
 636
 637         /* The class calls these when a device is found or gone. */
 638         int  (*lldd_dev_found)(struct domain_device *);
 639         void (*lldd_dev_gone)(struct domain_device *);
 640
 641         int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
 642
 643         /* Task Management Functions. Must be called from process context. */
 644         int (*lldd_abort_task)(struct sas_task *);
 645         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 646         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 647         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 648         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 649         int (*lldd_ata_check_ready)(struct domain_device *);
 650         void (*lldd_ata_set_dmamode)(struct domain_device *);
 651         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 652         int (*lldd_query_task)(struct sas_task *);
 653
 654         /* Port and Adapter management */
 655         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 656         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 657
 658         /* Phy management */
 659         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 660
 661         /* GPIO support */
 662         int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
 663                                u8 reg_index, u8 reg_count, u8 *write_data);
 664 };
 665
 666 extern int sas_register_ha(struct sas_ha_struct *);
 667 extern int sas_unregister_ha(struct sas_ha_struct *);
 668 extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
 669 extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
 670 extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
 671
 672 int sas_set_phy_speed(struct sas_phy *phy,
 673                       struct sas_phy_linkrates *rates);
 674 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
 675 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
 676 extern int sas_target_alloc(struct scsi_target *);
 677 extern int sas_slave_configure(struct scsi_device *);
 678 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
 679 extern int sas_bios_param(struct scsi_device *,
 680                           struct block_device *,
 681                           sector_t capacity, int *hsc);
 682 extern struct scsi_transport_template *
 683 sas_domain_attach_transport(struct sas_domain_function_template *);
 684 extern struct device_attribute dev_attr_phy_event_threshold;
 685
 686 int  sas_discover_root_expander(struct domain_device *);
 687
 688 void sas_init_ex_attr(void);
 689
 690 int  sas_ex_revalidate_domain(struct domain_device *);
 691
 692 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
 693 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 694 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 695
 696 int  sas_discover_sata(struct domain_device *);
 697 int  sas_discover_end_dev(struct domain_device *);
 698
 699 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
 700
 701 void sas_init_dev(struct domain_device *);
 702
 703 void sas_task_abort(struct sas_task *);
 704 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
 705 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 706 int sas_eh_target_reset_handler(struct scsi_cmnd *cmd);
 707
 708 extern void sas_target_destroy(struct scsi_target *);
 709 extern int sas_slave_alloc(struct scsi_device *);
 710 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 711 extern int sas_drain_work(struct sas_ha_struct *ha);
 712
 713 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 714                                   struct ssp_response_iu *iu);
 715 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
 716
 717 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 718
 719 #endif /* _SASLIB_H_ */