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         PHY_NUM_EVENTS        = 4,
  83 };
  84
  85 enum discover_event {
  86         DISCE_DISCOVER_DOMAIN   = 0U,
  87         DISCE_REVALIDATE_DOMAIN = 1,
  88         DISCE_PORT_GONE         = 2,
  89         DISCE_PROBE             = 3,
  90         DISCE_DESTRUCT          = 4,
  91         DISC_NUM_EVENTS         = 5,
  92 };
  93
  94 /* ---------- Expander Devices ---------- */
  95
  96 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
  97 #define to_dev_attr(_attr)  container_of(_attr, struct domain_dev_attribute,\
  98                                          attr)
  99
 100 enum routing_attribute {
 101         DIRECT_ROUTING,
 102         SUBTRACTIVE_ROUTING,
 103         TABLE_ROUTING,
 104 };
 105
 106 enum ex_phy_state {
 107         PHY_EMPTY,
 108         PHY_VACANT,
 109         PHY_NOT_PRESENT,
 110         PHY_DEVICE_DISCOVERED
 111 };
 112
 113 struct ex_phy {
 114         int    phy_id;
 115
 116         enum ex_phy_state phy_state;
 117
 118         enum sas_dev_type attached_dev_type;
 119         enum sas_linkrate linkrate;
 120
 121         u8   attached_sata_host:1;
 122         u8   attached_sata_dev:1;
 123         u8   attached_sata_ps:1;
 124
 125         enum sas_protocol attached_tproto;
 126         enum sas_protocol attached_iproto;
 127
 128         u8   attached_sas_addr[SAS_ADDR_SIZE];
 129         u8   attached_phy_id;
 130
 131         u8   phy_change_count;
 132         enum routing_attribute routing_attr;
 133         u8   virtual:1;
 134
 135         int  last_da_index;
 136
 137         struct sas_phy *phy;
 138         struct sas_port *port;
 139 };
 140
 141 struct expander_device {
 142         struct list_head children;
 143
 144         u16    ex_change_count;
 145         u16    max_route_indexes;
 146         u8     num_phys;
 147
 148         u8     t2t_supp:1;
 149         u8     configuring:1;
 150         u8     conf_route_table:1;
 151
 152         u8     enclosure_logical_id[8];
 153
 154         struct ex_phy *ex_phy;
 155         struct sas_port *parent_port;
 156
 157         struct mutex cmd_mutex;
 158 };
 159
 160 /* ---------- SATA device ---------- */
 161 enum ata_command_set {
 162         ATA_COMMAND_SET   = 0,
 163         ATAPI_COMMAND_SET = 1,
 164 };
 165
 166 struct sata_device {
 167         enum   ata_command_set command_set;
 168         struct smp_resp        rps_resp; /* report_phy_sata_resp */
 169         u8     port_no;        /* port number, if this is a PM (Port) */
 170         struct list_head children; /* PM Ports if this is a PM */
 171
 172         struct ata_port *ap;
 173         struct ata_host ata_host;
 174         struct ata_taskfile tf;
 175 };
 176
 177 enum {
 178         SAS_DEV_GONE,
 179         SAS_DEV_DESTROY,
 180 };
 181
 182 struct domain_device {
 183         spinlock_t done_lock;
 184         enum sas_dev_type dev_type;
 185
 186         enum sas_linkrate linkrate;
 187         enum sas_linkrate min_linkrate;
 188         enum sas_linkrate max_linkrate;
 189
 190         int  pathways;
 191
 192         struct domain_device *parent;
 193         struct list_head siblings; /* devices on the same level */
 194         struct asd_sas_port *port;        /* shortcut to root of the tree */
 195         struct sas_phy *phy;
 196
 197         struct list_head dev_list_node;
 198         struct list_head disco_list_node; /* awaiting probe or destruct */
 199
 200         enum sas_protocol    iproto;
 201         enum sas_protocol    tproto;
 202
 203         struct sas_rphy *rphy;
 204
 205         u8  sas_addr[SAS_ADDR_SIZE];
 206         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 207
 208         u8  frame_rcvd[32];
 209
 210         union {
 211                 struct expander_device ex_dev;
 212                 struct sata_device     sata_dev; /* STP & directly attached */
 213         };
 214
 215         void *lldd_dev;
 216         unsigned long state;
 217         struct kref kref;
 218 };
 219
 220 struct sas_work {
 221         struct list_head drain_node;
 222         struct work_struct work;
 223 };
 224
 225 static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
 226 {
 227         INIT_WORK(&sw->work, fn);
 228         INIT_LIST_HEAD(&sw->drain_node);
 229 }
 230
 231 struct sas_discovery_event {
 232         struct sas_work work;
 233         struct asd_sas_port *port;
 234 };
 235
 236 static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
 237 {
 238         struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
 239
 240         return ev;
 241 }
 242
 243 struct sas_discovery {
 244         struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
 245         unsigned long    pending;
 246         u8     fanout_sas_addr[8];
 247         u8     eeds_a[8];
 248         u8     eeds_b[8];
 249         int    max_level;
 250 };
 251
 252 /* The port struct is Class:RW, driver:RO */
 253 struct asd_sas_port {
 254 /* private: */
 255         struct completion port_gone_completion;
 256
 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         enum   sas_linkrate linkrate;
 264
 265         struct sas_work work;
 266
 267 /* public: */
 268         int id;
 269
 270         enum sas_class   class;
 271         u8               sas_addr[SAS_ADDR_SIZE];
 272         u8               attached_sas_addr[SAS_ADDR_SIZE];
 273         enum sas_protocol   iproto;
 274         enum sas_protocol   tproto;
 275
 276         enum sas_oob_mode oob_mode;
 277
 278         spinlock_t       phy_list_lock;
 279         struct list_head phy_list;
 280         int              num_phys;
 281         u32              phy_mask;
 282
 283         struct sas_ha_struct *ha;
 284
 285         struct sas_port *port;
 286
 287         void *lldd_port;          /* not touched by the sas class code */
 288 };
 289
 290 struct asd_sas_event {
 291         struct sas_work work;
 292         struct asd_sas_phy *phy;
 293 };
 294
 295 static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
 296 {
 297         struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
 298
 299         return ev;
 300 }
 301
 302 /* The phy pretty much is controlled by the LLDD.
 303  * The class only reads those fields.
 304  */
 305 struct asd_sas_phy {
 306 /* private: */
 307         struct asd_sas_event   port_events[PORT_NUM_EVENTS];
 308         struct asd_sas_event   phy_events[PHY_NUM_EVENTS];
 309
 310         unsigned long port_events_pending;
 311         unsigned long phy_events_pending;
 312
 313         int error;
 314
 315         struct sas_phy *phy;
 316
 317 /* public: */
 318         /* The following are class:RO, driver:R/W */
 319         int            enabled;   /* must be set */
 320
 321         int            id;        /* must be set */
 322         enum sas_class class;
 323         enum sas_protocol iproto;
 324         enum sas_protocol tproto;
 325
 326         enum sas_phy_type  type;
 327         enum sas_phy_role  role;
 328         enum sas_oob_mode  oob_mode;
 329         enum sas_linkrate linkrate;
 330
 331         u8   *sas_addr;           /* must be set */
 332         u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
 333
 334         spinlock_t     frame_rcvd_lock;
 335         u8             *frame_rcvd; /* must be set */
 336         int            frame_rcvd_size;
 337
 338         spinlock_t     sas_prim_lock;
 339         u32            sas_prim;
 340
 341         struct list_head port_phy_el; /* driver:RO */
 342         struct asd_sas_port      *port; /* Class:RW, driver: RO */
 343
 344         struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
 345
 346         void *lldd_phy;           /* not touched by the sas_class_code */
 347 };
 348
 349 struct scsi_core {
 350         struct Scsi_Host *shost;
 351
 352         struct mutex      task_queue_flush;
 353         spinlock_t        task_queue_lock;
 354         struct list_head  task_queue;
 355         int               task_queue_size;
 356
 357         struct task_struct *queue_thread;
 358 };
 359
 360 struct sas_ha_event {
 361         struct sas_work work;
 362         struct sas_ha_struct *ha;
 363 };
 364
 365 static inline struct sas_ha_event *to_sas_ha_event(struct work_struct *work)
 366 {
 367         struct sas_ha_event *ev = container_of(work, typeof(*ev), work.work);
 368
 369         return ev;
 370 }
 371
 372 enum sas_ha_state {
 373         SAS_HA_REGISTERED,
 374         SAS_HA_DRAINING,
 375         SAS_HA_ATA_EH_ACTIVE,
 376         SAS_HA_FROZEN,
 377 };
 378
 379 struct sas_ha_struct {
 380 /* private: */
 381         struct sas_ha_event ha_events[HA_NUM_EVENTS];
 382         unsigned long    pending;
 383
 384         struct list_head  defer_q; /* work queued while draining */
 385         struct mutex      drain_mutex;
 386         unsigned long     state;
 387         spinlock_t        state_lock;
 388
 389         struct mutex disco_mutex;
 390
 391         struct scsi_core core;
 392
 393 /* public: */
 394         char *sas_ha_name;
 395         struct device *dev;       /* should be set */
 396         struct module *lldd_module; /* should be set */
 397
 398         u8 *sas_addr;             /* must be set */
 399         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 400
 401         spinlock_t      phy_port_lock;
 402         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 403         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 404         int             num_phys; /* must be set, gt 0, static */
 405
 406         /* The class calls this to send a task for execution. */
 407         int lldd_max_execute_num;
 408         int lldd_queue_size;
 409         int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
 410                                 * their siblings when forming wide ports */
 411
 412         /* LLDD calls these to notify the class of an event. */
 413         void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
 414         void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 415         void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 416
 417         void *lldd_ha;            /* not touched by sas class code */
 418
 419         struct list_head eh_done_q;  /* complete via scsi_eh_flush_done_q */
 420         struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
 421 };
 422
 423 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 424
 425 static inline struct domain_device *
 426 starget_to_domain_dev(struct scsi_target *starget) {
 427         return starget->hostdata;
 428 }
 429
 430 static inline struct domain_device *
 431 sdev_to_domain_dev(struct scsi_device *sdev) {
 432         return starget_to_domain_dev(sdev->sdev_target);
 433 }
 434
 435 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
 436 {
 437         return &dev->sata_dev.ap->link.device[0];
 438 }
 439
 440 static inline struct domain_device *
 441 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 442 {
 443         return sdev_to_domain_dev(cmd->device);
 444 }
 445
 446 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 447
 448 /* Before calling a notify event, LLDD should use this function
 449  * when the link is severed (possibly from its tasklet).
 450  * The idea is that the Class only reads those, while the LLDD,
 451  * can R/W these (thus avoiding a race).
 452  */
 453 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 454 {
 455         phy->oob_mode = OOB_NOT_CONNECTED;
 456         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 457 }
 458
 459 static inline unsigned int to_sas_gpio_od(int device, int bit)
 460 {
 461         return 3 * device + bit;
 462 }
 463
 464 static inline void sas_put_local_phy(struct sas_phy *phy)
 465 {
 466         put_device(&phy->dev);
 467 }
 468
 469 #ifdef CONFIG_SCSI_SAS_HOST_SMP
 470 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
 471 #else
 472 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
 473 {
 474         return -1;
 475 }
 476 #endif
 477
 478 /* ---------- Tasks ---------- */
 479 /*
 480       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 481   exec_status          |                     |                       |
 482   ---------------------+---------------------+-----------------------+
 483        SAM_...         |         X           |                       |
 484        DEV_NO_RESPONSE |         X           |           X           |
 485        INTERRUPTED     |         X           |                       |
 486        QUEUE_FULL      |                     |           X           |
 487        DEVICE_UNKNOWN  |                     |           X           |
 488        SG_ERR          |                     |           X           |
 489   ---------------------+---------------------+-----------------------+
 490  */
 491
 492 enum service_response {
 493         SAS_TASK_COMPLETE,
 494         SAS_TASK_UNDELIVERED = -1,
 495 };
 496
 497 enum exec_status {
 498         /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
 499          * them here to silence 'case value not in enumerated type' warnings
 500          */
 501         __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 502
 503         SAS_DEV_NO_RESPONSE = 0x80,
 504         SAS_DATA_UNDERRUN,
 505         SAS_DATA_OVERRUN,
 506         SAS_INTERRUPTED,
 507         SAS_QUEUE_FULL,
 508         SAS_DEVICE_UNKNOWN,
 509         SAS_SG_ERR,
 510         SAS_OPEN_REJECT,
 511         SAS_OPEN_TO,
 512         SAS_PROTO_RESPONSE,
 513         SAS_PHY_DOWN,
 514         SAS_NAK_R_ERR,
 515         SAS_PENDING,
 516         SAS_ABORTED_TASK,
 517 };
 518
 519 /* When a task finishes with a response, the LLDD examines the
 520  * response:
 521  *      - For an ATA task task_status_struct::stat is set to
 522  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 523  * contents of struct ata_task_resp.
 524  *      - For SSP tasks, if no data is present or status/TMF response
 525  * is valid, task_status_struct::stat is set.  If data is present
 526  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 527  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 528  * set to SAM_CHECK_COND.
 529  *
 530  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 531  * for ATA task.
 532  *
 533  * "frame_len" is the total frame length, which could be more or less
 534  * than actually copied.
 535  *
 536  * Tasks ending with response, always set the residual field.
 537  */
 538 struct ata_task_resp {
 539         u16  frame_len;
 540         u8   ending_fis[24];      /* dev to host or data-in */
 541 };
 542
 543 #define SAS_STATUS_BUF_SIZE 96
 544
 545 struct task_status_struct {
 546         enum service_response resp;
 547         enum exec_status      stat;
 548         int  buf_valid_size;
 549
 550         u8   buf[SAS_STATUS_BUF_SIZE];
 551
 552         u32  residual;
 553         enum sas_open_rej_reason open_rej_reason;
 554 };
 555
 556 /* ATA and ATAPI task queuable to a SAS LLDD.
 557  */
 558 struct sas_ata_task {
 559         struct host_to_dev_fis fis;
 560         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 561
 562         u8     retry_count;       /* hardware retry, should be > 0 */
 563
 564         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 565         u8     use_ncq:1;
 566         u8     set_affil_pol:1;
 567         u8     stp_affil_pol:1;
 568
 569         u8     device_control_reg_update:1;
 570 };
 571
 572 struct sas_smp_task {
 573         struct scatterlist smp_req;
 574         struct scatterlist smp_resp;
 575 };
 576
 577 enum task_attribute {
 578         TASK_ATTR_SIMPLE = 0,
 579         TASK_ATTR_HOQ    = 1,
 580         TASK_ATTR_ORDERED= 2,
 581         TASK_ATTR_ACA    = 4,
 582 };
 583
 584 struct sas_ssp_task {
 585         u8     retry_count;       /* hardware retry, should be > 0 */
 586
 587         u8     LUN[8];
 588         u8     enable_first_burst:1;
 589         enum   task_attribute task_attr;
 590         u8     task_prio;
 591         u8     cdb[16];
 592 };
 593
 594 struct sas_task {
 595         struct domain_device *dev;
 596         struct list_head      list;
 597
 598         spinlock_t   task_state_lock;
 599         unsigned     task_state_flags;
 600
 601         enum   sas_protocol      task_proto;
 602
 603         /* Used by the discovery code. */
 604         struct timer_list     timer;
 605         struct completion     completion;
 606
 607         union {
 608                 struct sas_ata_task ata_task;
 609                 struct sas_smp_task smp_task;
 610                 struct sas_ssp_task ssp_task;
 611         };
 612
 613         struct scatterlist *scatter;
 614         int    num_scatter;
 615         u32    total_xfer_len;
 616         u8     data_dir:2;        /* Use PCI_DMA_... */
 617
 618         struct task_status_struct task_status;
 619         void   (*task_done)(struct sas_task *);
 620
 621         void   *lldd_task;        /* for use by LLDDs */
 622         void   *uldd_task;
 623
 624         struct work_struct abort_work;
 625 };
 626
 627 #define SAS_TASK_STATE_PENDING      1
 628 #define SAS_TASK_STATE_DONE         2
 629 #define SAS_TASK_STATE_ABORTED      4
 630 #define SAS_TASK_NEED_DEV_RESET     8
 631 #define SAS_TASK_AT_INITIATOR       16
 632
 633 extern struct sas_task *sas_alloc_task(gfp_t flags);
 634 extern void sas_free_task(struct sas_task *task);
 635
 636 struct sas_domain_function_template {
 637         /* The class calls these to notify the LLDD of an event. */
 638         void (*lldd_port_formed)(struct asd_sas_phy *);
 639         void (*lldd_port_deformed)(struct asd_sas_phy *);
 640
 641         /* The class calls these when a device is found or gone. */
 642         int  (*lldd_dev_found)(struct domain_device *);
 643         void (*lldd_dev_gone)(struct domain_device *);
 644
 645         int (*lldd_execute_task)(struct sas_task *, int num,
 646                                  gfp_t gfp_flags);
 647
 648         /* Task Management Functions. Must be called from process context. */
 649         int (*lldd_abort_task)(struct sas_task *);
 650         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 651         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 652         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 653         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 654         int (*lldd_ata_check_ready)(struct domain_device *);
 655         void (*lldd_ata_set_dmamode)(struct domain_device *);
 656         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 657         int (*lldd_query_task)(struct sas_task *);
 658
 659         /* Port and Adapter management */
 660         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 661         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 662
 663         /* Phy management */
 664         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 665
 666         /* GPIO support */
 667         int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
 668                                u8 reg_index, u8 reg_count, u8 *write_data);
 669 };
 670
 671 extern int sas_register_ha(struct sas_ha_struct *);
 672 extern int sas_unregister_ha(struct sas_ha_struct *);
 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 int sas_queue_up(struct sas_task *task);
 678 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
 679 extern int sas_target_alloc(struct scsi_target *);
 680 extern int sas_slave_configure(struct scsi_device *);
 681 extern int sas_change_queue_depth(struct scsi_device *, int new_depth,
 682                                   int reason);
 683 extern int sas_change_queue_type(struct scsi_device *, int qt);
 684 extern int sas_bios_param(struct scsi_device *,
 685                           struct block_device *,
 686                           sector_t capacity, int *hsc);
 687 extern struct scsi_transport_template *
 688 sas_domain_attach_transport(struct sas_domain_function_template *);
 689 extern void sas_domain_release_transport(struct scsi_transport_template *);
 690
 691 int  sas_discover_root_expander(struct domain_device *);
 692
 693 void sas_init_ex_attr(void);
 694
 695 int  sas_ex_revalidate_domain(struct domain_device *);
 696
 697 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
 698 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 699 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 700
 701 int  sas_discover_sata(struct domain_device *);
 702 int  sas_discover_end_dev(struct domain_device *);
 703
 704 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
 705
 706 void sas_init_dev(struct domain_device *);
 707
 708 void sas_task_abort(struct sas_task *);
 709 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 710 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
 711
 712 extern void sas_target_destroy(struct scsi_target *);
 713 extern int sas_slave_alloc(struct scsi_device *);
 714 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 715 extern int sas_drain_work(struct sas_ha_struct *ha);
 716
 717 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
 718                            struct request *req);
 719
 720 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 721                                   struct ssp_response_iu *iu);
 722 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
 723
 724 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 725
 726 #endif /* _SASLIB_H_ */