1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * SAS host prototypes and structures header file 4 * 5 * Copyright (C) 2005 Adaptec, Inc. All rights reserved. 6 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> 7 */ 8 9#ifndef _LIBSAS_H_ 10#define _LIBSAS_H_ 11 12 13#include <linux/timer.h> 14#include <linux/pci.h> 15#include <scsi/sas.h> 16#include <linux/libata.h> 17#include <linux/list.h> 18#include <scsi/scsi_device.h> 19#include <scsi/scsi_cmnd.h> 20#include <scsi/scsi_transport_sas.h> 21#include <linux/scatterlist.h> 22#include <linux/slab.h> 23 24struct block_device; 25 26enum sas_phy_role { 27 PHY_ROLE_NONE = 0, 28 PHY_ROLE_TARGET = 0x40, 29 PHY_ROLE_INITIATOR = 0x80, 30}; 31 32/* The events are mnemonically described in sas_dump.c 33 * so when updating/adding events here, please also 34 * update the other file too. 35 */ 36enum port_event { 37 PORTE_BYTES_DMAED = 0U, 38 PORTE_BROADCAST_RCVD, 39 PORTE_LINK_RESET_ERR, 40 PORTE_TIMER_EVENT, 41 PORTE_HARD_RESET, 42 PORT_NUM_EVENTS, 43}; 44 45enum phy_event { 46 PHYE_LOSS_OF_SIGNAL = 0U, 47 PHYE_OOB_DONE, 48 PHYE_OOB_ERROR, 49 PHYE_SPINUP_HOLD, /* hot plug SATA, no COMWAKE sent */ 50 PHYE_RESUME_TIMEOUT, 51 PHYE_SHUTDOWN, 52 PHY_NUM_EVENTS, 53}; 54 55enum discover_event { 56 DISCE_DISCOVER_DOMAIN = 0U, 57 DISCE_REVALIDATE_DOMAIN, 58 DISCE_SUSPEND, 59 DISCE_RESUME, 60 DISC_NUM_EVENTS, 61}; 62 63/* ---------- Expander Devices ---------- */ 64 65#define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj) 66#define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\ 67 attr) 68 69enum routing_attribute { 70 DIRECT_ROUTING, 71 SUBTRACTIVE_ROUTING, 72 TABLE_ROUTING, 73}; 74 75enum ex_phy_state { 76 PHY_EMPTY, 77 PHY_VACANT, 78 PHY_NOT_PRESENT, 79 PHY_DEVICE_DISCOVERED 80}; 81 82struct ex_phy { 83 int phy_id; 84 85 enum ex_phy_state phy_state; 86 87 enum sas_device_type attached_dev_type; 88 enum sas_linkrate linkrate; 89 90 u8 attached_sata_host:1; 91 u8 attached_sata_dev:1; 92 u8 attached_sata_ps:1; 93 94 enum sas_protocol attached_tproto; 95 enum sas_protocol attached_iproto; 96 97 u8 attached_sas_addr[SAS_ADDR_SIZE]; 98 u8 attached_phy_id; 99 100 int phy_change_count; 101 enum routing_attribute routing_attr; 102 u8 virtual:1; 103 104 int last_da_index; 105 106 struct sas_phy *phy; 107 struct sas_port *port; 108}; 109 110struct expander_device { 111 struct list_head children; 112 113 int ex_change_count; 114 u16 max_route_indexes; 115 u8 num_phys; 116 117 u8 t2t_supp:1; 118 u8 configuring:1; 119 u8 conf_route_table:1; 120 121 u8 enclosure_logical_id[8]; 122 123 struct ex_phy *ex_phy; 124 struct sas_port *parent_port; 125 126 struct mutex cmd_mutex; 127}; 128 129/* ---------- SATA device ---------- */ 130#define ATA_RESP_FIS_SIZE 24 131 132struct sata_device { 133 unsigned int class; 134 u8 port_no; /* port number, if this is a PM (Port) */ 135 136 struct ata_port *ap; 137 struct ata_host *ata_host; 138 struct smp_rps_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */ 139 u8 fis[ATA_RESP_FIS_SIZE]; 140}; 141 142struct ssp_device { 143 struct list_head eh_list_node; /* pending a user requested eh action */ 144 struct scsi_lun reset_lun; 145}; 146 147enum { 148 SAS_DEV_GONE, 149 SAS_DEV_FOUND, /* device notified to lldd */ 150 SAS_DEV_DESTROY, 151 SAS_DEV_EH_PENDING, 152 SAS_DEV_LU_RESET, 153 SAS_DEV_RESET, 154}; 155 156struct domain_device { 157 spinlock_t done_lock; 158 enum sas_device_type dev_type; 159 160 enum sas_linkrate linkrate; 161 enum sas_linkrate min_linkrate; 162 enum sas_linkrate max_linkrate; 163 164 int pathways; 165 166 struct domain_device *parent; 167 struct list_head siblings; /* devices on the same level */ 168 struct asd_sas_port *port; /* shortcut to root of the tree */ 169 struct sas_phy *phy; 170 171 struct list_head dev_list_node; 172 struct list_head disco_list_node; /* awaiting probe or destruct */ 173 174 enum sas_protocol iproto; 175 enum sas_protocol tproto; 176 177 struct sas_rphy *rphy; 178 179 u8 sas_addr[SAS_ADDR_SIZE]; 180 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE]; 181 182 u8 frame_rcvd[32]; 183 184 union { 185 struct expander_device ex_dev; 186 struct sata_device sata_dev; /* STP & directly attached */ 187 struct ssp_device ssp_dev; 188 }; 189 190 void *lldd_dev; 191 unsigned long state; 192 struct kref kref; 193}; 194 195struct sas_work { 196 struct list_head drain_node; 197 struct work_struct work; 198}; 199 200static inline bool dev_is_expander(enum sas_device_type type) 201{ 202 return type == SAS_EDGE_EXPANDER_DEVICE || 203 type == SAS_FANOUT_EXPANDER_DEVICE; 204} 205 206static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *)) 207{ 208 INIT_WORK(&sw->work, fn); 209 INIT_LIST_HEAD(&sw->drain_node); 210} 211 212struct sas_discovery_event { 213 struct sas_work work; 214 struct asd_sas_port *port; 215}; 216 217static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work) 218{ 219 struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work); 220 221 return ev; 222} 223 224struct sas_discovery { 225 struct sas_discovery_event disc_work[DISC_NUM_EVENTS]; 226 unsigned long pending; 227 u8 fanout_sas_addr[SAS_ADDR_SIZE]; 228 u8 eeds_a[SAS_ADDR_SIZE]; 229 u8 eeds_b[SAS_ADDR_SIZE]; 230 int max_level; 231}; 232 233/* The port struct is Class:RW, driver:RO */ 234struct asd_sas_port { 235/* private: */ 236 struct sas_discovery disc; 237 struct domain_device *port_dev; 238 spinlock_t dev_list_lock; 239 struct list_head dev_list; 240 struct list_head disco_list; 241 struct list_head destroy_list; 242 struct list_head sas_port_del_list; 243 enum sas_linkrate linkrate; 244 245 struct sas_work work; 246 int suspended; 247 248/* public: */ 249 int id; 250 251 u8 sas_addr[SAS_ADDR_SIZE]; 252 u8 attached_sas_addr[SAS_ADDR_SIZE]; 253 enum sas_protocol iproto; 254 enum sas_protocol tproto; 255 256 enum sas_oob_mode oob_mode; 257 258 spinlock_t phy_list_lock; 259 struct list_head phy_list; 260 int num_phys; 261 u32 phy_mask; 262 263 struct sas_ha_struct *ha; 264 265 struct sas_port *port; 266 267 void *lldd_port; /* not touched by the sas class code */ 268}; 269 270struct asd_sas_event { 271 struct sas_work work; 272 struct asd_sas_phy *phy; 273 int event; 274}; 275 276static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work) 277{ 278 struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work); 279 280 return ev; 281} 282 283static inline void INIT_SAS_EVENT(struct asd_sas_event *ev, 284 void (*fn)(struct work_struct *), 285 struct asd_sas_phy *phy, int event) 286{ 287 INIT_SAS_WORK(&ev->work, fn); 288 ev->phy = phy; 289 ev->event = event; 290} 291 292#define SAS_PHY_SHUTDOWN_THRES 1024 293 294/* The phy pretty much is controlled by the LLDD. 295 * The class only reads those fields. 296 */ 297struct asd_sas_phy { 298/* private: */ 299 atomic_t event_nr; 300 int in_shutdown; 301 int error; 302 int suspended; 303 304 struct sas_phy *phy; 305 306/* public: */ 307 /* The following are class:RO, driver:R/W */ 308 int enabled; /* must be set */ 309 310 int id; /* must be set */ 311 enum sas_protocol iproto; 312 enum sas_protocol tproto; 313 314 enum sas_phy_role role; 315 enum sas_oob_mode oob_mode; 316 enum sas_linkrate linkrate; 317 318 u8 *sas_addr; /* must be set */ 319 u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */ 320 321 spinlock_t frame_rcvd_lock; 322 u8 *frame_rcvd; /* must be set */ 323 int frame_rcvd_size; 324 325 spinlock_t sas_prim_lock; 326 u32 sas_prim; 327 328 struct list_head port_phy_el; /* driver:RO */ 329 struct asd_sas_port *port; /* Class:RW, driver: RO */ 330 331 struct sas_ha_struct *ha; /* may be set; the class sets it anyway */ 332 333 void *lldd_phy; /* not touched by the sas_class_code */ 334}; 335 336enum sas_ha_state { 337 SAS_HA_REGISTERED, 338 SAS_HA_DRAINING, 339 SAS_HA_ATA_EH_ACTIVE, 340 SAS_HA_FROZEN, 341 SAS_HA_RESUMING, 342}; 343 344struct sas_ha_struct { 345/* private: */ 346 struct list_head defer_q; /* work queued while draining */ 347 struct mutex drain_mutex; 348 unsigned long state; 349 spinlock_t lock; 350 int eh_active; 351 wait_queue_head_t eh_wait_q; 352 struct list_head eh_dev_q; 353 354 struct mutex disco_mutex; 355 356 struct Scsi_Host *shost; 357 358/* public: */ 359 char *sas_ha_name; 360 struct device *dev; /* should be set */ 361 362 struct workqueue_struct *event_q; 363 struct workqueue_struct *disco_q; 364 365 u8 *sas_addr; /* must be set */ 366 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE]; 367 368 spinlock_t phy_port_lock; 369 struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */ 370 struct asd_sas_port **sas_port; /* array of valid pointers, must be set */ 371 int num_phys; /* must be set, gt 0, static */ 372 373 int strict_wide_ports; /* both sas_addr and attached_sas_addr must match 374 * their siblings when forming wide ports */ 375 376 void *lldd_ha; /* not touched by sas class code */ 377 378 struct list_head eh_done_q; /* complete via scsi_eh_flush_done_q */ 379 struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */ 380 381 int event_thres; 382}; 383 384#define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata) 385 386static inline struct domain_device * 387starget_to_domain_dev(struct scsi_target *starget) { 388 return starget->hostdata; 389} 390 391static inline struct domain_device * 392sdev_to_domain_dev(struct scsi_device *sdev) { 393 return starget_to_domain_dev(sdev->sdev_target); 394} 395 396static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev) 397{ 398 return &dev->sata_dev.ap->link.device[0]; 399} 400 401static inline struct domain_device * 402cmd_to_domain_dev(struct scsi_cmnd *cmd) 403{ 404 return sdev_to_domain_dev(cmd->device); 405} 406 407/* Before calling a notify event, LLDD should use this function 408 * when the link is severed (possibly from its tasklet). 409 * The idea is that the Class only reads those, while the LLDD, 410 * can R/W these (thus avoiding a race). 411 */ 412static inline void sas_phy_disconnected(struct asd_sas_phy *phy) 413{ 414 phy->oob_mode = OOB_NOT_CONNECTED; 415 phy->linkrate = SAS_LINK_RATE_UNKNOWN; 416} 417 418static inline unsigned int to_sas_gpio_od(int device, int bit) 419{ 420 return 3 * device + bit; 421} 422 423static inline void sas_put_local_phy(struct sas_phy *phy) 424{ 425 put_device(&phy->dev); 426} 427 428#ifdef CONFIG_SCSI_SAS_HOST_SMP 429int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count); 430#else 431static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count) 432{ 433 return -1; 434} 435#endif 436 437/* ---------- Tasks ---------- */ 438/* 439 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED | 440 exec_status | | | 441 ---------------------+---------------------+-----------------------+ 442 SAM_... | X | | 443 DEV_NO_RESPONSE | X | X | 444 INTERRUPTED | X | | 445 QUEUE_FULL | | X | 446 DEVICE_UNKNOWN | | X | 447 SG_ERR | | X | 448 ---------------------+---------------------+-----------------------+ 449 */ 450 451enum service_response { 452 SAS_TASK_COMPLETE, 453 SAS_TASK_UNDELIVERED = -1, 454}; 455 456enum exec_status { 457 /* 458 * Values 0..0x7f are used to return the SAM_STAT_* codes. To avoid 459 * 'case value not in enumerated type' compiler warnings every value 460 * returned through the exec_status enum needs an alias with the SAS_ 461 * prefix here. 462 */ 463 SAS_SAM_STAT_GOOD = SAM_STAT_GOOD, 464 SAS_SAM_STAT_BUSY = SAM_STAT_BUSY, 465 SAS_SAM_STAT_TASK_ABORTED = SAM_STAT_TASK_ABORTED, 466 SAS_SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION, 467 468 SAS_DEV_NO_RESPONSE = 0x80, 469 SAS_DATA_UNDERRUN, 470 SAS_DATA_OVERRUN, 471 SAS_INTERRUPTED, 472 SAS_QUEUE_FULL, 473 SAS_DEVICE_UNKNOWN, 474 SAS_OPEN_REJECT, 475 SAS_OPEN_TO, 476 SAS_PROTO_RESPONSE, 477 SAS_PHY_DOWN, 478 SAS_NAK_R_ERR, 479 SAS_PENDING, 480 SAS_ABORTED_TASK, 481}; 482 483/* When a task finishes with a response, the LLDD examines the 484 * response: 485 * - For an ATA task task_status_struct::stat is set to 486 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the 487 * contents of struct ata_task_resp. 488 * - For SSP tasks, if no data is present or status/TMF response 489 * is valid, task_status_struct::stat is set. If data is present 490 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets 491 * task_status_struct::buf_valid_size, and task_status_struct::stat is 492 * set to SAM_CHECK_COND. 493 * 494 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp 495 * for ATA task. 496 * 497 * "frame_len" is the total frame length, which could be more or less 498 * than actually copied. 499 * 500 * Tasks ending with response, always set the residual field. 501 */ 502struct ata_task_resp { 503 u16 frame_len; 504 u8 ending_fis[ATA_RESP_FIS_SIZE]; /* dev to host or data-in */ 505}; 506 507#define SAS_STATUS_BUF_SIZE 96 508 509struct task_status_struct { 510 enum service_response resp; 511 enum exec_status stat; 512 int buf_valid_size; 513 514 u8 buf[SAS_STATUS_BUF_SIZE]; 515 516 u32 residual; 517 enum sas_open_rej_reason open_rej_reason; 518}; 519 520/* ATA and ATAPI task queuable to a SAS LLDD. 521 */ 522struct sas_ata_task { 523 struct host_to_dev_fis fis; 524 u8 atapi_packet[16]; /* 0 if not ATAPI task */ 525 526 u8 dma_xfer:1; /* PIO:0 or DMA:1 */ 527 u8 use_ncq:1; 528 u8 return_fis_on_success:1; 529 530 u8 device_control_reg_update:1; 531 532 bool force_phy; 533 int force_phy_id; 534}; 535 536/* LLDDs rely on these values */ 537enum sas_internal_abort { 538 SAS_INTERNAL_ABORT_SINGLE = 0, 539 SAS_INTERNAL_ABORT_DEV = 1, 540}; 541 542struct sas_internal_abort_task { 543 enum sas_internal_abort type; 544 unsigned int qid; 545 u16 tag; 546}; 547 548struct sas_smp_task { 549 struct scatterlist smp_req; 550 struct scatterlist smp_resp; 551}; 552 553enum task_attribute { 554 TASK_ATTR_SIMPLE = 0, 555 TASK_ATTR_HOQ = 1, 556 TASK_ATTR_ORDERED= 2, 557 TASK_ATTR_ACA = 4, 558}; 559 560struct sas_ssp_task { 561 u8 LUN[8]; 562 enum task_attribute task_attr; 563 struct scsi_cmnd *cmd; 564}; 565 566struct sas_tmf_task { 567 u8 tmf; 568 u16 tag_of_task_to_be_managed; 569}; 570 571struct sas_task { 572 struct domain_device *dev; 573 574 spinlock_t task_state_lock; 575 unsigned task_state_flags; 576 577 enum sas_protocol task_proto; 578 579 union { 580 struct sas_ata_task ata_task; 581 struct sas_smp_task smp_task; 582 struct sas_ssp_task ssp_task; 583 struct sas_internal_abort_task abort_task; 584 }; 585 586 struct scatterlist *scatter; 587 int num_scatter; 588 u32 total_xfer_len; 589 u8 data_dir:2; /* Use PCI_DMA_... */ 590 591 struct task_status_struct task_status; 592 void (*task_done)(struct sas_task *); 593 594 void *lldd_task; /* for use by LLDDs */ 595 void *uldd_task; 596 struct sas_task_slow *slow_task; 597 struct sas_tmf_task *tmf; 598}; 599 600struct sas_task_slow { 601 /* standard/extra infrastructure for slow path commands (SMP and 602 * internal lldd commands 603 */ 604 struct timer_list timer; 605 struct completion completion; 606 struct sas_task *task; 607}; 608 609#define SAS_TASK_STATE_PENDING 1 610#define SAS_TASK_STATE_DONE 2 611#define SAS_TASK_STATE_ABORTED 4 612#define SAS_TASK_NEED_DEV_RESET 8 613 614static inline bool sas_is_internal_abort(struct sas_task *task) 615{ 616 return task->task_proto == SAS_PROTOCOL_INTERNAL_ABORT; 617} 618 619static inline struct request *sas_task_find_rq(struct sas_task *task) 620{ 621 struct scsi_cmnd *scmd; 622 623 if (task->task_proto & SAS_PROTOCOL_STP_ALL) { 624 struct ata_queued_cmd *qc = task->uldd_task; 625 626 scmd = qc ? qc->scsicmd : NULL; 627 } else { 628 scmd = task->uldd_task; 629 } 630 631 if (!scmd) 632 return NULL; 633 634 return scsi_cmd_to_rq(scmd); 635} 636 637struct sas_domain_function_template { 638 /* The class calls these to notify the LLDD of an event. */ 639 void (*lldd_port_formed)(struct asd_sas_phy *); 640 void (*lldd_port_deformed)(struct asd_sas_phy *); 641 642 /* The class calls these when a device is found or gone. */ 643 int (*lldd_dev_found)(struct domain_device *); 644 void (*lldd_dev_gone)(struct domain_device *); 645 646 int (*lldd_execute_task)(struct sas_task *, 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_task_set)(struct domain_device *, u8 *lun); 652 int (*lldd_I_T_nexus_reset)(struct domain_device *); 653 int (*lldd_ata_check_ready)(struct domain_device *); 654 void (*lldd_ata_set_dmamode)(struct domain_device *); 655 int (*lldd_lu_reset)(struct domain_device *, u8 *lun); 656 int (*lldd_query_task)(struct sas_task *); 657 658 /* Special TMF callbacks */ 659 void (*lldd_tmf_exec_complete)(struct domain_device *dev); 660 void (*lldd_tmf_aborted)(struct sas_task *task); 661 bool (*lldd_abort_timeout)(struct sas_task *task, void *data); 662 663 /* Port and Adapter management */ 664 int (*lldd_clear_nexus_port)(struct asd_sas_port *); 665 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *); 666 667 /* Phy management */ 668 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *); 669 670 /* GPIO support */ 671 int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type, 672 u8 reg_index, u8 reg_count, u8 *write_data); 673}; 674 675extern int sas_register_ha(struct sas_ha_struct *); 676extern int sas_unregister_ha(struct sas_ha_struct *); 677extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha); 678extern void sas_resume_ha(struct sas_ha_struct *sas_ha); 679extern void sas_resume_ha_no_sync(struct sas_ha_struct *sas_ha); 680extern void sas_suspend_ha(struct sas_ha_struct *sas_ha); 681 682int sas_phy_reset(struct sas_phy *phy, int hard_reset); 683int sas_phy_enable(struct sas_phy *phy, int enable); 684extern int sas_queuecommand(struct Scsi_Host *, struct scsi_cmnd *); 685extern int sas_target_alloc(struct scsi_target *); 686extern int sas_slave_configure(struct scsi_device *); 687extern int sas_change_queue_depth(struct scsi_device *, int new_depth); 688extern int sas_bios_param(struct scsi_device *, struct block_device *, 689 sector_t capacity, int *hsc); 690int sas_execute_internal_abort_single(struct domain_device *device, 691 u16 tag, unsigned int qid, 692 void *data); 693int sas_execute_internal_abort_dev(struct domain_device *device, 694 unsigned int qid, void *data); 695extern struct scsi_transport_template * 696sas_domain_attach_transport(struct sas_domain_function_template *); 697extern struct device_attribute dev_attr_phy_event_threshold; 698 699void sas_task_abort(struct sas_task *); 700int sas_eh_abort_handler(struct scsi_cmnd *cmd); 701int sas_eh_device_reset_handler(struct scsi_cmnd *cmd); 702int sas_eh_target_reset_handler(struct scsi_cmnd *cmd); 703 704extern void sas_target_destroy(struct scsi_target *); 705extern int sas_slave_alloc(struct scsi_device *); 706extern int sas_ioctl(struct scsi_device *sdev, unsigned int cmd, 707 void __user *arg); 708extern int sas_drain_work(struct sas_ha_struct *ha); 709 710extern void sas_ssp_task_response(struct device *dev, struct sas_task *task, 711 struct ssp_response_iu *iu); 712struct sas_phy *sas_get_local_phy(struct domain_device *dev); 713 714int sas_request_addr(struct Scsi_Host *shost, u8 *addr); 715 716int sas_abort_task_set(struct domain_device *dev, u8 *lun); 717int sas_clear_task_set(struct domain_device *dev, u8 *lun); 718int sas_lu_reset(struct domain_device *dev, u8 *lun); 719int sas_query_task(struct sas_task *task, u16 tag); 720int sas_abort_task(struct sas_task *task, u16 tag); 721int sas_find_attached_phy_id(struct expander_device *ex_dev, 722 struct domain_device *dev); 723 724void sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event, 725 gfp_t gfp_flags); 726void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event, 727 gfp_t gfp_flags); 728 729#endif /* _SASLIB_H_ */ 730