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 <asm/semaphore.h>
  36 #include <scsi/scsi_device.h>
  37 #include <scsi/scsi_cmnd.h>
  38 #include <scsi/scsi_transport_sas.h>
  39 #include <asm/scatterlist.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         DISC_NUM_EVENTS         = 3,
  90 };
  91
  92 /* ---------- Expander Devices ---------- */
  93
  94 #define ETASK 0xFA
  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_proto attached_tproto;
 126         enum sas_proto 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         u8     configuring:1;
 148         u8     conf_route_table:1;
 149         u8     enclosure_logical_id[8];
 150
 151         struct ex_phy *ex_phy;
 152         struct sas_port *parent_port;
 153 };
 154
 155 /* ---------- SATA device ---------- */
 156 enum ata_command_set {
 157         ATA_COMMAND_SET   = 0,
 158         ATAPI_COMMAND_SET = 1,
 159 };
 160
 161 struct sata_device {
 162         enum   ata_command_set command_set;
 163         struct smp_resp        rps_resp; /* report_phy_sata_resp */
 164         __le16 *identify_device;
 165         __le16 *identify_packet_device;
 166
 167         u8     port_no;        /* port number, if this is a PM (Port) */
 168         struct list_head children; /* PM Ports if this is a PM */
 169
 170         struct ata_port *ap;
 171         struct ata_host ata_host;
 172         struct ata_taskfile tf;
 173         u32 sstatus;
 174         u32 serror;
 175         u32 scontrol;
 176 };
 177
 178 /* ---------- Domain device ---------- */
 179 struct domain_device {
 180         enum sas_dev_type dev_type;
 181
 182         enum sas_linkrate linkrate;
 183         enum sas_linkrate min_linkrate;
 184         enum sas_linkrate max_linkrate;
 185
 186         int  pathways;
 187
 188         struct domain_device *parent;
 189         struct list_head siblings; /* devices on the same level */
 190         struct asd_sas_port *port;        /* shortcut to root of the tree */
 191
 192         struct list_head dev_list_node;
 193
 194         enum sas_proto    iproto;
 195         enum sas_proto    tproto;
 196
 197         struct sas_rphy *rphy;
 198
 199         u8  sas_addr[SAS_ADDR_SIZE];
 200         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 201
 202         u8  frame_rcvd[32];
 203
 204         union {
 205                 struct expander_device ex_dev;
 206                 struct sata_device     sata_dev; /* STP & directly attached */
 207         };
 208
 209         void *lldd_dev;
 210 };
 211
 212 struct sas_discovery_event {
 213         struct work_struct work;
 214         struct asd_sas_port *port;
 215 };
 216
 217 struct sas_discovery {
 218         spinlock_t disc_event_lock;
 219         struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
 220         unsigned long    pending;
 221         u8     fanout_sas_addr[8];
 222         u8     eeds_a[8];
 223         u8     eeds_b[8];
 224         int    max_level;
 225 };
 226
 227
 228 /* The port struct is Class:RW, driver:RO */
 229 struct asd_sas_port {
 230 /* private: */
 231         struct completion port_gone_completion;
 232
 233         struct sas_discovery disc;
 234         struct domain_device *port_dev;
 235         spinlock_t dev_list_lock;
 236         struct list_head dev_list;
 237         enum   sas_linkrate linkrate;
 238
 239         struct sas_phy *phy;
 240         struct work_struct work;
 241
 242 /* public: */
 243         int id;
 244
 245         enum sas_class   class;
 246         u8               sas_addr[SAS_ADDR_SIZE];
 247         u8               attached_sas_addr[SAS_ADDR_SIZE];
 248         enum sas_proto   iproto;
 249         enum sas_proto   tproto;
 250
 251         enum sas_oob_mode oob_mode;
 252
 253         spinlock_t       phy_list_lock;
 254         struct list_head phy_list;
 255         int              num_phys;
 256         u32              phy_mask;
 257
 258         struct sas_ha_struct *ha;
 259
 260         struct sas_port *port;
 261
 262         void *lldd_port;          /* not touched by the sas class code */
 263 };
 264
 265 struct asd_sas_event {
 266         struct work_struct work;
 267         struct asd_sas_phy *phy;
 268 };
 269
 270 /* The phy pretty much is controlled by the LLDD.
 271  * The class only reads those fields.
 272  */
 273 struct asd_sas_phy {
 274 /* private: */
 275         /* protected by ha->event_lock */
 276         struct asd_sas_event   port_events[PORT_NUM_EVENTS];
 277         struct asd_sas_event   phy_events[PHY_NUM_EVENTS];
 278
 279         unsigned long port_events_pending;
 280         unsigned long phy_events_pending;
 281
 282         int error;
 283
 284         struct sas_phy *phy;
 285
 286 /* public: */
 287         /* The following are class:RO, driver:R/W */
 288         int            enabled;   /* must be set */
 289
 290         int            id;        /* must be set */
 291         enum sas_class class;
 292         enum sas_proto iproto;
 293         enum sas_proto tproto;
 294
 295         enum sas_phy_type  type;
 296         enum sas_phy_role  role;
 297         enum sas_oob_mode  oob_mode;
 298         enum sas_linkrate linkrate;
 299
 300         u8   *sas_addr;           /* must be set */
 301         u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
 302
 303         spinlock_t     frame_rcvd_lock;
 304         u8             *frame_rcvd; /* must be set */
 305         int            frame_rcvd_size;
 306
 307         spinlock_t     sas_prim_lock;
 308         u32            sas_prim;
 309
 310         struct list_head port_phy_el; /* driver:RO */
 311         struct asd_sas_port      *port; /* Class:RW, driver: RO */
 312
 313         struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
 314
 315         void *lldd_phy;           /* not touched by the sas_class_code */
 316 };
 317
 318 struct scsi_core {
 319         struct Scsi_Host *shost;
 320
 321         spinlock_t        task_queue_lock;
 322         struct list_head  task_queue;
 323         int               task_queue_size;
 324
 325         struct task_struct *queue_thread;
 326 };
 327
 328 struct sas_ha_event {
 329         struct work_struct work;
 330         struct sas_ha_struct *ha;
 331 };
 332
 333 enum sas_ha_state {
 334         SAS_HA_REGISTERED,
 335         SAS_HA_UNREGISTERED
 336 };
 337
 338 struct sas_ha_struct {
 339 /* private: */
 340         spinlock_t       event_lock;
 341         struct sas_ha_event ha_events[HA_NUM_EVENTS];
 342         unsigned long    pending;
 343
 344         enum sas_ha_state state;
 345         spinlock_t        state_lock;
 346
 347         struct scsi_core core;
 348
 349 /* public: */
 350         char *sas_ha_name;
 351         struct device *dev;       /* should be set */
 352         struct module *lldd_module; /* should be set */
 353
 354         u8 *sas_addr;             /* must be set */
 355         u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
 356
 357         spinlock_t      phy_port_lock;
 358         struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
 359         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
 360         int             num_phys; /* must be set, gt 0, static */
 361
 362         /* The class calls this to send a task for execution. */
 363         int lldd_max_execute_num;
 364         int lldd_queue_size;
 365
 366         /* LLDD calls these to notify the class of an event. */
 367         void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
 368         void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
 369         void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
 370
 371         void *lldd_ha;            /* not touched by sas class code */
 372
 373         struct list_head eh_done_q;
 374 };
 375
 376 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
 377
 378 static inline struct domain_device *
 379 starget_to_domain_dev(struct scsi_target *starget) {
 380         return starget->hostdata;
 381 }
 382
 383 static inline struct domain_device *
 384 sdev_to_domain_dev(struct scsi_device *sdev) {
 385         return starget_to_domain_dev(sdev->sdev_target);
 386 }
 387
 388 static inline struct domain_device *
 389 cmd_to_domain_dev(struct scsi_cmnd *cmd)
 390 {
 391         return sdev_to_domain_dev(cmd->device);
 392 }
 393
 394 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
 395
 396 /* Before calling a notify event, LLDD should use this function
 397  * when the link is severed (possibly from its tasklet).
 398  * The idea is that the Class only reads those, while the LLDD,
 399  * can R/W these (thus avoiding a race).
 400  */
 401 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
 402 {
 403         phy->oob_mode = OOB_NOT_CONNECTED;
 404         phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 405 }
 406
 407 /* ---------- Tasks ---------- */
 408 /*
 409       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
 410   exec_status          |                     |                       |
 411   ---------------------+---------------------+-----------------------+
 412        SAM_...         |         X           |                       |
 413        DEV_NO_RESPONSE |         X           |           X           |
 414        INTERRUPTED     |         X           |                       |
 415        QUEUE_FULL      |                     |           X           |
 416        DEVICE_UNKNOWN  |                     |           X           |
 417        SG_ERR          |                     |           X           |
 418   ---------------------+---------------------+-----------------------+
 419  */
 420
 421 enum service_response {
 422         SAS_TASK_COMPLETE,
 423         SAS_TASK_UNDELIVERED = -1,
 424 };
 425
 426 enum exec_status {
 427         SAM_GOOD         = 0,
 428         SAM_CHECK_COND   = 2,
 429         SAM_COND_MET     = 4,
 430         SAM_BUSY         = 8,
 431         SAM_INTERMEDIATE = 0x10,
 432         SAM_IM_COND_MET  = 0x12,
 433         SAM_RESV_CONFLICT= 0x14,
 434         SAM_TASK_SET_FULL= 0x28,
 435         SAM_ACA_ACTIVE   = 0x30,
 436         SAM_TASK_ABORTED = 0x40,
 437
 438         SAS_DEV_NO_RESPONSE = 0x80,
 439         SAS_DATA_UNDERRUN,
 440         SAS_DATA_OVERRUN,
 441         SAS_INTERRUPTED,
 442         SAS_QUEUE_FULL,
 443         SAS_DEVICE_UNKNOWN,
 444         SAS_SG_ERR,
 445         SAS_OPEN_REJECT,
 446         SAS_OPEN_TO,
 447         SAS_PROTO_RESPONSE,
 448         SAS_PHY_DOWN,
 449         SAS_NAK_R_ERR,
 450         SAS_PENDING,
 451         SAS_ABORTED_TASK,
 452 };
 453
 454 /* When a task finishes with a response, the LLDD examines the
 455  * response:
 456  *      - For an ATA task task_status_struct::stat is set to
 457  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
 458  * contents of struct ata_task_resp.
 459  *      - For SSP tasks, if no data is present or status/TMF response
 460  * is valid, task_status_struct::stat is set.  If data is present
 461  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
 462  * task_status_struct::buf_valid_size, and task_status_struct::stat is
 463  * set to SAM_CHECK_COND.
 464  *
 465  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
 466  * for ATA task.
 467  *
 468  * "frame_len" is the total frame length, which could be more or less
 469  * than actually copied.
 470  *
 471  * Tasks ending with response, always set the residual field.
 472  */
 473 struct ata_task_resp {
 474         u16  frame_len;
 475         u8   ending_fis[24];      /* dev to host or data-in */
 476         u32  sstatus;
 477         u32  serror;
 478         u32  scontrol;
 479         u32  sactive;
 480 };
 481
 482 #define SAS_STATUS_BUF_SIZE 96
 483
 484 struct task_status_struct {
 485         enum service_response resp;
 486         enum exec_status      stat;
 487         int  buf_valid_size;
 488
 489         u8   buf[SAS_STATUS_BUF_SIZE];
 490
 491         u32  residual;
 492         enum sas_open_rej_reason open_rej_reason;
 493 };
 494
 495 /* ATA and ATAPI task queuable to a SAS LLDD.
 496  */
 497 struct sas_ata_task {
 498         struct host_to_dev_fis fis;
 499         u8     atapi_packet[16];  /* 0 if not ATAPI task */
 500
 501         u8     retry_count;       /* hardware retry, should be > 0 */
 502
 503         u8     dma_xfer:1;        /* PIO:0 or DMA:1 */
 504         u8     use_ncq:1;
 505         u8     set_affil_pol:1;
 506         u8     stp_affil_pol:1;
 507
 508         u8     device_control_reg_update:1;
 509 };
 510
 511 struct sas_smp_task {
 512         struct scatterlist smp_req;
 513         struct scatterlist smp_resp;
 514 };
 515
 516 enum task_attribute {
 517         TASK_ATTR_SIMPLE = 0,
 518         TASK_ATTR_HOQ    = 1,
 519         TASK_ATTR_ORDERED= 2,
 520         TASK_ATTR_ACA    = 4,
 521 };
 522
 523 struct sas_ssp_task {
 524         u8     retry_count;       /* hardware retry, should be > 0 */
 525
 526         u8     LUN[8];
 527         u8     enable_first_burst:1;
 528         enum   task_attribute task_attr;
 529         u8     task_prio;
 530         u8     cdb[16];
 531 };
 532
 533 struct sas_task {
 534         struct domain_device *dev;
 535         struct list_head      list;
 536
 537         spinlock_t   task_state_lock;
 538         unsigned     task_state_flags;
 539
 540         enum   sas_proto      task_proto;
 541
 542         /* Used by the discovery code. */
 543         struct timer_list     timer;
 544         struct completion     completion;
 545
 546         union {
 547                 struct sas_ata_task ata_task;
 548                 struct sas_smp_task smp_task;
 549                 struct sas_ssp_task ssp_task;
 550         };
 551
 552         struct scatterlist *scatter;
 553         int    num_scatter;
 554         u32    total_xfer_len;
 555         u8     data_dir:2;        /* Use PCI_DMA_... */
 556
 557         struct task_status_struct task_status;
 558         void   (*task_done)(struct sas_task *);
 559
 560         void   *lldd_task;        /* for use by LLDDs */
 561         void   *uldd_task;
 562
 563         struct work_struct abort_work;
 564 };
 565
 566
 567
 568 #define SAS_TASK_STATE_PENDING      1
 569 #define SAS_TASK_STATE_DONE         2
 570 #define SAS_TASK_STATE_ABORTED      4
 571 #define SAS_TASK_NEED_DEV_RESET     8
 572 #define SAS_TASK_AT_INITIATOR       16
 573
 574 static inline struct sas_task *sas_alloc_task(gfp_t flags)
 575 {
 576         extern struct kmem_cache *sas_task_cache;
 577         struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
 578
 579         if (task) {
 580                 INIT_LIST_HEAD(&task->list);
 581                 spin_lock_init(&task->task_state_lock);
 582                 task->task_state_flags = SAS_TASK_STATE_PENDING;
 583                 init_timer(&task->timer);
 584                 init_completion(&task->completion);
 585         }
 586
 587         return task;
 588 }
 589
 590 static inline void sas_free_task(struct sas_task *task)
 591 {
 592         if (task) {
 593                 extern struct kmem_cache *sas_task_cache;
 594                 BUG_ON(!list_empty(&task->list));
 595                 kmem_cache_free(sas_task_cache, task);
 596         }
 597 }
 598
 599 struct sas_domain_function_template {
 600         /* The class calls these to notify the LLDD of an event. */
 601         void (*lldd_port_formed)(struct asd_sas_phy *);
 602         void (*lldd_port_deformed)(struct asd_sas_phy *);
 603
 604         /* The class calls these when a device is found or gone. */
 605         int  (*lldd_dev_found)(struct domain_device *);
 606         void (*lldd_dev_gone)(struct domain_device *);
 607
 608         int (*lldd_execute_task)(struct sas_task *, int num,
 609                                  gfp_t gfp_flags);
 610
 611         /* Task Management Functions. Must be called from process context. */
 612         int (*lldd_abort_task)(struct sas_task *);
 613         int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
 614         int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
 615         int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
 616         int (*lldd_I_T_nexus_reset)(struct domain_device *);
 617         int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 618         int (*lldd_query_task)(struct sas_task *);
 619
 620         /* Port and Adapter management */
 621         int (*lldd_clear_nexus_port)(struct asd_sas_port *);
 622         int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
 623
 624         /* Phy management */
 625         int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
 626 };
 627
 628 extern int sas_register_ha(struct sas_ha_struct *);
 629 extern int sas_unregister_ha(struct sas_ha_struct *);
 630
 631 int sas_set_phy_speed(struct sas_phy *phy,
 632                       struct sas_phy_linkrates *rates);
 633 int sas_phy_enable(struct sas_phy *phy, int enabled);
 634 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
 635 int sas_queue_up(struct sas_task *task);
 636 extern int sas_queuecommand(struct scsi_cmnd *,
 637                      void (*scsi_done)(struct scsi_cmnd *));
 638 extern int sas_target_alloc(struct scsi_target *);
 639 extern int sas_slave_alloc(struct scsi_device *);
 640 extern int sas_slave_configure(struct scsi_device *);
 641 extern void sas_slave_destroy(struct scsi_device *);
 642 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
 643 extern int sas_change_queue_type(struct scsi_device *, int qt);
 644 extern int sas_bios_param(struct scsi_device *,
 645                           struct block_device *,
 646                           sector_t capacity, int *hsc);
 647 extern struct scsi_transport_template *
 648 sas_domain_attach_transport(struct sas_domain_function_template *);
 649 extern void sas_domain_release_transport(struct scsi_transport_template *);
 650
 651 int  sas_discover_root_expander(struct domain_device *);
 652
 653 void sas_init_ex_attr(void);
 654
 655 int  sas_ex_revalidate_domain(struct domain_device *);
 656
 657 void sas_unregister_domain_devices(struct asd_sas_port *port);
 658 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
 659 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 660
 661 int  sas_discover_sata(struct domain_device *);
 662 int  sas_discover_end_dev(struct domain_device *);
 663
 664 void sas_unregister_dev(struct domain_device *);
 665
 666 void sas_init_dev(struct domain_device *);
 667
 668 void sas_task_abort(struct sas_task *);
 669 int __sas_task_abort(struct sas_task *);
 670 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
 671 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
 672
 673 extern void sas_target_destroy(struct scsi_target *);
 674 extern int sas_slave_alloc(struct scsi_device *);
 675 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 676
 677 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
 678                            struct request *req);
 679 #endif /* _SASLIB_H_ */