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
24 struct block_device;
25
26 enum 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 */
36 enum 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
45 enum 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
55 enum 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
69 enum routing_attribute {
70 DIRECT_ROUTING,
71 SUBTRACTIVE_ROUTING,
72 TABLE_ROUTING,
73 };
74
75 enum ex_phy_state {
76 PHY_EMPTY,
77 PHY_VACANT,
78 PHY_NOT_PRESENT,
79 PHY_DEVICE_DISCOVERED
80 };
81
82 struct 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
110 struct 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
132 struct 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
142 struct ssp_device {
143 struct list_head eh_list_node; /* pending a user requested eh action */
144 struct scsi_lun reset_lun;
145 };
146
147 enum {
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
156 struct 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
195 struct sas_work {
196 struct list_head drain_node;
197 struct work_struct work;
198 };
199
dev_is_expander(enum sas_device_type type)200 static 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
INIT_SAS_WORK(struct sas_work * sw,void (* fn)(struct work_struct *))206 static 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
212 struct sas_discovery_event {
213 struct sas_work work;
214 struct asd_sas_port *port;
215 };
216
to_sas_discovery_event(struct work_struct * work)217 static 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
224 struct 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 */
234 struct 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
270 struct asd_sas_event {
271 struct sas_work work;
272 struct asd_sas_phy *phy;
273 int event;
274 };
275
to_asd_sas_event(struct work_struct * work)276 static 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
INIT_SAS_EVENT(struct asd_sas_event * ev,void (* fn)(struct work_struct *),struct asd_sas_phy * phy,int event)283 static 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 */
297 struct 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
336 enum 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
344 struct 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
386 static inline struct domain_device *
starget_to_domain_dev(struct scsi_target * starget)387 starget_to_domain_dev(struct scsi_target *starget) {
388 return starget->hostdata;
389 }
390
391 static inline struct domain_device *
sdev_to_domain_dev(struct scsi_device * sdev)392 sdev_to_domain_dev(struct scsi_device *sdev) {
393 return starget_to_domain_dev(sdev->sdev_target);
394 }
395
sas_to_ata_dev(struct domain_device * dev)396 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
397 {
398 return &dev->sata_dev.ap->link.device[0];
399 }
400
401 static inline struct domain_device *
cmd_to_domain_dev(struct scsi_cmnd * cmd)402 cmd_to_domain_dev(struct scsi_cmnd *cmd)
403 {
404 return sdev_to_domain_dev(cmd->device);
405 }
406
407 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
408
409 /* Before calling a notify event, LLDD should use this function
410 * when the link is severed (possibly from its tasklet).
411 * The idea is that the Class only reads those, while the LLDD,
412 * can R/W these (thus avoiding a race).
413 */
sas_phy_disconnected(struct asd_sas_phy * phy)414 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
415 {
416 phy->oob_mode = OOB_NOT_CONNECTED;
417 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
418 }
419
to_sas_gpio_od(int device,int bit)420 static inline unsigned int to_sas_gpio_od(int device, int bit)
421 {
422 return 3 * device + bit;
423 }
424
sas_put_local_phy(struct sas_phy * phy)425 static inline void sas_put_local_phy(struct sas_phy *phy)
426 {
427 put_device(&phy->dev);
428 }
429
430 #ifdef CONFIG_SCSI_SAS_HOST_SMP
431 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
432 #else
try_test_sas_gpio_gp_bit(unsigned int od,u8 * data,u8 index,u8 count)433 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
434 {
435 return -1;
436 }
437 #endif
438
439 /* ---------- Tasks ---------- */
440 /*
441 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
442 exec_status | | |
443 ---------------------+---------------------+-----------------------+
444 SAM_... | X | |
445 DEV_NO_RESPONSE | X | X |
446 INTERRUPTED | X | |
447 QUEUE_FULL | | X |
448 DEVICE_UNKNOWN | | X |
449 SG_ERR | | X |
450 ---------------------+---------------------+-----------------------+
451 */
452
453 enum service_response {
454 SAS_TASK_COMPLETE,
455 SAS_TASK_UNDELIVERED = -1,
456 };
457
458 enum exec_status {
459 /*
460 * Values 0..0x7f are used to return the SAM_STAT_* codes. To avoid
461 * 'case value not in enumerated type' compiler warnings every value
462 * returned through the exec_status enum needs an alias with the SAS_
463 * prefix here.
464 */
465 SAS_SAM_STAT_GOOD = SAM_STAT_GOOD,
466 SAS_SAM_STAT_BUSY = SAM_STAT_BUSY,
467 SAS_SAM_STAT_TASK_ABORTED = SAM_STAT_TASK_ABORTED,
468 SAS_SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
469
470 SAS_DEV_NO_RESPONSE = 0x80,
471 SAS_DATA_UNDERRUN,
472 SAS_DATA_OVERRUN,
473 SAS_INTERRUPTED,
474 SAS_QUEUE_FULL,
475 SAS_DEVICE_UNKNOWN,
476 SAS_OPEN_REJECT,
477 SAS_OPEN_TO,
478 SAS_PROTO_RESPONSE,
479 SAS_PHY_DOWN,
480 SAS_NAK_R_ERR,
481 SAS_PENDING,
482 SAS_ABORTED_TASK,
483 };
484
485 /* When a task finishes with a response, the LLDD examines the
486 * response:
487 * - For an ATA task task_status_struct::stat is set to
488 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
489 * contents of struct ata_task_resp.
490 * - For SSP tasks, if no data is present or status/TMF response
491 * is valid, task_status_struct::stat is set. If data is present
492 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
493 * task_status_struct::buf_valid_size, and task_status_struct::stat is
494 * set to SAM_CHECK_COND.
495 *
496 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
497 * for ATA task.
498 *
499 * "frame_len" is the total frame length, which could be more or less
500 * than actually copied.
501 *
502 * Tasks ending with response, always set the residual field.
503 */
504 struct ata_task_resp {
505 u16 frame_len;
506 u8 ending_fis[ATA_RESP_FIS_SIZE]; /* dev to host or data-in */
507 };
508
509 #define SAS_STATUS_BUF_SIZE 96
510
511 struct task_status_struct {
512 enum service_response resp;
513 enum exec_status stat;
514 int buf_valid_size;
515
516 u8 buf[SAS_STATUS_BUF_SIZE];
517
518 u32 residual;
519 enum sas_open_rej_reason open_rej_reason;
520 };
521
522 /* ATA and ATAPI task queuable to a SAS LLDD.
523 */
524 struct sas_ata_task {
525 struct host_to_dev_fis fis;
526 u8 atapi_packet[16]; /* 0 if not ATAPI task */
527
528 u8 dma_xfer:1; /* PIO:0 or DMA:1 */
529 u8 use_ncq:1;
530 u8 return_fis_on_success:1;
531
532 u8 device_control_reg_update:1;
533
534 bool force_phy;
535 int force_phy_id;
536 };
537
538 /* LLDDs rely on these values */
539 enum sas_internal_abort {
540 SAS_INTERNAL_ABORT_SINGLE = 0,
541 SAS_INTERNAL_ABORT_DEV = 1,
542 };
543
544 struct sas_internal_abort_task {
545 enum sas_internal_abort type;
546 unsigned int qid;
547 u16 tag;
548 };
549
550 struct sas_smp_task {
551 struct scatterlist smp_req;
552 struct scatterlist smp_resp;
553 };
554
555 enum task_attribute {
556 TASK_ATTR_SIMPLE = 0,
557 TASK_ATTR_HOQ = 1,
558 TASK_ATTR_ORDERED= 2,
559 TASK_ATTR_ACA = 4,
560 };
561
562 struct sas_ssp_task {
563 u8 LUN[8];
564 enum task_attribute task_attr;
565 struct scsi_cmnd *cmd;
566 };
567
568 struct sas_tmf_task {
569 u8 tmf;
570 u16 tag_of_task_to_be_managed;
571 };
572
573 struct sas_task {
574 struct domain_device *dev;
575
576 spinlock_t task_state_lock;
577 unsigned task_state_flags;
578
579 enum sas_protocol task_proto;
580
581 union {
582 struct sas_ata_task ata_task;
583 struct sas_smp_task smp_task;
584 struct sas_ssp_task ssp_task;
585 struct sas_internal_abort_task abort_task;
586 };
587
588 struct scatterlist *scatter;
589 int num_scatter;
590 u32 total_xfer_len;
591 u8 data_dir:2; /* Use PCI_DMA_... */
592
593 struct task_status_struct task_status;
594 void (*task_done)(struct sas_task *);
595
596 void *lldd_task; /* for use by LLDDs */
597 void *uldd_task;
598 struct sas_task_slow *slow_task;
599 struct sas_tmf_task *tmf;
600 };
601
602 struct sas_task_slow {
603 /* standard/extra infrastructure for slow path commands (SMP and
604 * internal lldd commands
605 */
606 struct timer_list timer;
607 struct completion completion;
608 struct sas_task *task;
609 };
610
611 #define SAS_TASK_STATE_PENDING 1
612 #define SAS_TASK_STATE_DONE 2
613 #define SAS_TASK_STATE_ABORTED 4
614 #define SAS_TASK_NEED_DEV_RESET 8
615
sas_is_internal_abort(struct sas_task * task)616 static inline bool sas_is_internal_abort(struct sas_task *task)
617 {
618 return task->task_proto == SAS_PROTOCOL_INTERNAL_ABORT;
619 }
620
sas_task_find_rq(struct sas_task * task)621 static inline struct request *sas_task_find_rq(struct sas_task *task)
622 {
623 struct scsi_cmnd *scmd;
624
625 if (task->task_proto & SAS_PROTOCOL_STP_ALL) {
626 struct ata_queued_cmd *qc = task->uldd_task;
627
628 scmd = qc ? qc->scsicmd : NULL;
629 } else {
630 scmd = task->uldd_task;
631 }
632
633 if (!scmd)
634 return NULL;
635
636 return scsi_cmd_to_rq(scmd);
637 }
638
639 struct sas_domain_function_template {
640 /* The class calls these to notify the LLDD of an event. */
641 void (*lldd_port_formed)(struct asd_sas_phy *);
642 void (*lldd_port_deformed)(struct asd_sas_phy *);
643
644 /* The class calls these when a device is found or gone. */
645 int (*lldd_dev_found)(struct domain_device *);
646 void (*lldd_dev_gone)(struct domain_device *);
647
648 int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
649
650 /* Task Management Functions. Must be called from process context. */
651 int (*lldd_abort_task)(struct sas_task *);
652 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
653 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
654 int (*lldd_I_T_nexus_reset)(struct domain_device *);
655 int (*lldd_ata_check_ready)(struct domain_device *);
656 void (*lldd_ata_set_dmamode)(struct domain_device *);
657 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
658 int (*lldd_query_task)(struct sas_task *);
659
660 /* Special TMF callbacks */
661 void (*lldd_tmf_exec_complete)(struct domain_device *dev);
662 void (*lldd_tmf_aborted)(struct sas_task *task);
663 bool (*lldd_abort_timeout)(struct sas_task *task, void *data);
664
665 /* Port and Adapter management */
666 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
667 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
668
669 /* Phy management */
670 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
671
672 /* GPIO support */
673 int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
674 u8 reg_index, u8 reg_count, u8 *write_data);
675 };
676
677 extern int sas_register_ha(struct sas_ha_struct *);
678 extern int sas_unregister_ha(struct sas_ha_struct *);
679 extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
680 extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
681 extern void sas_resume_ha_no_sync(struct sas_ha_struct *sas_ha);
682 extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
683
684 int sas_set_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates);
685 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
686 int sas_phy_enable(struct sas_phy *phy, int enable);
687 extern int sas_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
688 extern int sas_target_alloc(struct scsi_target *);
689 extern int sas_slave_configure(struct scsi_device *);
690 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
691 extern int sas_bios_param(struct scsi_device *, struct block_device *,
692 sector_t capacity, int *hsc);
693 int sas_execute_internal_abort_single(struct domain_device *device,
694 u16 tag, unsigned int qid,
695 void *data);
696 int sas_execute_internal_abort_dev(struct domain_device *device,
697 unsigned int qid, void *data);
698 extern struct scsi_transport_template *
699 sas_domain_attach_transport(struct sas_domain_function_template *);
700 extern struct device_attribute dev_attr_phy_event_threshold;
701
702 int sas_discover_root_expander(struct domain_device *);
703
704 int sas_ex_revalidate_domain(struct domain_device *);
705
706 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
707 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
708 void sas_discover_event(struct asd_sas_port *, enum discover_event ev);
709
710 int sas_discover_end_dev(struct domain_device *);
711
712 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
713
714 void sas_init_dev(struct domain_device *);
715
716 void sas_task_abort(struct sas_task *);
717 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
718 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
719 int sas_eh_target_reset_handler(struct scsi_cmnd *cmd);
720
721 extern void sas_target_destroy(struct scsi_target *);
722 extern int sas_slave_alloc(struct scsi_device *);
723 extern int sas_ioctl(struct scsi_device *sdev, unsigned int cmd,
724 void __user *arg);
725 extern int sas_drain_work(struct sas_ha_struct *ha);
726
727 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
728 struct ssp_response_iu *iu);
729 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
730
731 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
732
733 int sas_abort_task_set(struct domain_device *dev, u8 *lun);
734 int sas_clear_task_set(struct domain_device *dev, u8 *lun);
735 int sas_lu_reset(struct domain_device *dev, u8 *lun);
736 int sas_query_task(struct sas_task *task, u16 tag);
737 int sas_abort_task(struct sas_task *task, u16 tag);
738 int sas_find_attached_phy_id(struct expander_device *ex_dev,
739 struct domain_device *dev);
740
741 void sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
742 gfp_t gfp_flags);
743 void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event,
744 gfp_t gfp_flags);
745
746 #endif /* _SASLIB_H_ */
747
