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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_class {
27 SAS,
28 EXPANDER
29};
30
31enum sas_phy_role {
32 PHY_ROLE_NONE = 0,
33 PHY_ROLE_TARGET = 0x40,
34 PHY_ROLE_INITIATOR = 0x80,
35};
36
37enum sas_phy_type {
38 PHY_TYPE_PHYSICAL,
39 PHY_TYPE_VIRTUAL
40};
41
42/* The events are mnemonically described in sas_dump.c
43 * so when updating/adding events here, please also
44 * update the other file too.
45 */
46enum port_event {
47 PORTE_BYTES_DMAED = 0U,
48 PORTE_BROADCAST_RCVD,
49 PORTE_LINK_RESET_ERR,
50 PORTE_TIMER_EVENT,
51 PORTE_HARD_RESET,
52 PORT_NUM_EVENTS,
53};
54
55enum phy_event {
56 PHYE_LOSS_OF_SIGNAL = 0U,
57 PHYE_OOB_DONE,
58 PHYE_OOB_ERROR,
59 PHYE_SPINUP_HOLD, /* hot plug SATA, no COMWAKE sent */
60 PHYE_RESUME_TIMEOUT,
61 PHYE_SHUTDOWN,
62 PHY_NUM_EVENTS,
63};
64
65enum discover_event {
66 DISCE_DISCOVER_DOMAIN = 0U,
67 DISCE_REVALIDATE_DOMAIN,
68 DISCE_SUSPEND,
69 DISCE_RESUME,
70 DISC_NUM_EVENTS,
71};
72
73/* ---------- Expander Devices ---------- */
74
75#define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
76#define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\
77 attr)
78
79enum routing_attribute {
80 DIRECT_ROUTING,
81 SUBTRACTIVE_ROUTING,
82 TABLE_ROUTING,
83};
84
85enum ex_phy_state {
86 PHY_EMPTY,
87 PHY_VACANT,
88 PHY_NOT_PRESENT,
89 PHY_DEVICE_DISCOVERED
90};
91
92struct ex_phy {
93 int phy_id;
94
95 enum ex_phy_state phy_state;
96
97 enum sas_device_type attached_dev_type;
98 enum sas_linkrate linkrate;
99
100 u8 attached_sata_host:1;
101 u8 attached_sata_dev:1;
102 u8 attached_sata_ps:1;
103
104 enum sas_protocol attached_tproto;
105 enum sas_protocol attached_iproto;
106
107 u8 attached_sas_addr[SAS_ADDR_SIZE];
108 u8 attached_phy_id;
109
110 int phy_change_count;
111 enum routing_attribute routing_attr;
112 u8 virtual:1;
113
114 int last_da_index;
115
116 struct sas_phy *phy;
117 struct sas_port *port;
118};
119
120struct expander_device {
121 struct list_head children;
122
123 int ex_change_count;
124 u16 max_route_indexes;
125 u8 num_phys;
126
127 u8 t2t_supp:1;
128 u8 configuring:1;
129 u8 conf_route_table:1;
130
131 u8 enclosure_logical_id[8];
132
133 struct ex_phy *ex_phy;
134 struct sas_port *parent_port;
135
136 struct mutex cmd_mutex;
137};
138
139/* ---------- SATA device ---------- */
140#define ATA_RESP_FIS_SIZE 24
141
142struct sata_device {
143 unsigned int class;
144 u8 port_no; /* port number, if this is a PM (Port) */
145
146 struct ata_port *ap;
147 struct ata_host *ata_host;
148 struct smp_rps_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */
149 u8 fis[ATA_RESP_FIS_SIZE];
150};
151
152struct ssp_device {
153 struct list_head eh_list_node; /* pending a user requested eh action */
154 struct scsi_lun reset_lun;
155};
156
157enum {
158 SAS_DEV_GONE,
159 SAS_DEV_FOUND, /* device notified to lldd */
160 SAS_DEV_DESTROY,
161 SAS_DEV_EH_PENDING,
162 SAS_DEV_LU_RESET,
163 SAS_DEV_RESET,
164};
165
166struct domain_device {
167 spinlock_t done_lock;
168 enum sas_device_type dev_type;
169
170 enum sas_linkrate linkrate;
171 enum sas_linkrate min_linkrate;
172 enum sas_linkrate max_linkrate;
173
174 int pathways;
175
176 struct domain_device *parent;
177 struct list_head siblings; /* devices on the same level */
178 struct asd_sas_port *port; /* shortcut to root of the tree */
179 struct sas_phy *phy;
180
181 struct list_head dev_list_node;
182 struct list_head disco_list_node; /* awaiting probe or destruct */
183
184 enum sas_protocol iproto;
185 enum sas_protocol tproto;
186
187 struct sas_rphy *rphy;
188
189 u8 sas_addr[SAS_ADDR_SIZE];
190 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
191
192 u8 frame_rcvd[32];
193
194 union {
195 struct expander_device ex_dev;
196 struct sata_device sata_dev; /* STP & directly attached */
197 struct ssp_device ssp_dev;
198 };
199
200 void *lldd_dev;
201 unsigned long state;
202 struct kref kref;
203};
204
205struct sas_work {
206 struct list_head drain_node;
207 struct work_struct work;
208};
209
210static inline bool dev_is_expander(enum sas_device_type type)
211{
212 return type == SAS_EDGE_EXPANDER_DEVICE ||
213 type == SAS_FANOUT_EXPANDER_DEVICE;
214}
215
216static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
217{
218 INIT_WORK(&sw->work, fn);
219 INIT_LIST_HEAD(&sw->drain_node);
220}
221
222struct sas_discovery_event {
223 struct sas_work work;
224 struct asd_sas_port *port;
225};
226
227static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
228{
229 struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
230
231 return ev;
232}
233
234struct sas_discovery {
235 struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
236 unsigned long pending;
237 u8 fanout_sas_addr[SAS_ADDR_SIZE];
238 u8 eeds_a[SAS_ADDR_SIZE];
239 u8 eeds_b[SAS_ADDR_SIZE];
240 int max_level;
241};
242
243/* The port struct is Class:RW, driver:RO */
244struct asd_sas_port {
245/* private: */
246 struct sas_discovery disc;
247 struct domain_device *port_dev;
248 spinlock_t dev_list_lock;
249 struct list_head dev_list;
250 struct list_head disco_list;
251 struct list_head destroy_list;
252 struct list_head sas_port_del_list;
253 enum sas_linkrate linkrate;
254
255 struct sas_work work;
256 int suspended;
257
258/* public: */
259 int id;
260
261 enum sas_class class;
262 u8 sas_addr[SAS_ADDR_SIZE];
263 u8 attached_sas_addr[SAS_ADDR_SIZE];
264 enum sas_protocol iproto;
265 enum sas_protocol tproto;
266
267 enum sas_oob_mode oob_mode;
268
269 spinlock_t phy_list_lock;
270 struct list_head phy_list;
271 int num_phys;
272 u32 phy_mask;
273
274 struct sas_ha_struct *ha;
275
276 struct sas_port *port;
277
278 void *lldd_port; /* not touched by the sas class code */
279};
280
281struct asd_sas_event {
282 struct sas_work work;
283 struct asd_sas_phy *phy;
284 int event;
285};
286
287static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
288{
289 struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
290
291 return ev;
292}
293
294static inline void INIT_SAS_EVENT(struct asd_sas_event *ev,
295 void (*fn)(struct work_struct *),
296 struct asd_sas_phy *phy, int event)
297{
298 INIT_SAS_WORK(&ev->work, fn);
299 ev->phy = phy;
300 ev->event = event;
301}
302
303#define SAS_PHY_SHUTDOWN_THRES 1024
304
305/* The phy pretty much is controlled by the LLDD.
306 * The class only reads those fields.
307 */
308struct asd_sas_phy {
309/* private: */
310 atomic_t event_nr;
311 int in_shutdown;
312 int error;
313 int suspended;
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
349struct scsi_core {
350 struct Scsi_Host *shost;
351
352};
353
354enum sas_ha_state {
355 SAS_HA_REGISTERED,
356 SAS_HA_DRAINING,
357 SAS_HA_ATA_EH_ACTIVE,
358 SAS_HA_FROZEN,
359 SAS_HA_RESUMING,
360};
361
362struct sas_ha_struct {
363/* private: */
364 struct list_head defer_q; /* work queued while draining */
365 struct mutex drain_mutex;
366 unsigned long state;
367 spinlock_t lock;
368 int eh_active;
369 wait_queue_head_t eh_wait_q;
370 struct list_head eh_dev_q;
371
372 struct mutex disco_mutex;
373
374 struct scsi_core core;
375
376/* public: */
377 char *sas_ha_name;
378 struct device *dev; /* should be set */
379 struct module *lldd_module; /* should be set */
380
381 struct workqueue_struct *event_q;
382 struct workqueue_struct *disco_q;
383
384 u8 *sas_addr; /* must be set */
385 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
386
387 spinlock_t phy_port_lock;
388 struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
389 struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
390 int num_phys; /* must be set, gt 0, static */
391
392 int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
393 * their siblings when forming wide ports */
394
395 void *lldd_ha; /* not touched by sas class code */
396
397 struct list_head eh_done_q; /* complete via scsi_eh_flush_done_q */
398 struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
399
400 int event_thres;
401};
402
403#define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
404
405static inline struct domain_device *
406starget_to_domain_dev(struct scsi_target *starget) {
407 return starget->hostdata;
408}
409
410static inline struct domain_device *
411sdev_to_domain_dev(struct scsi_device *sdev) {
412 return starget_to_domain_dev(sdev->sdev_target);
413}
414
415static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
416{
417 return &dev->sata_dev.ap->link.device[0];
418}
419
420static inline struct domain_device *
421cmd_to_domain_dev(struct scsi_cmnd *cmd)
422{
423 return sdev_to_domain_dev(cmd->device);
424}
425
426void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
427
428/* Before calling a notify event, LLDD should use this function
429 * when the link is severed (possibly from its tasklet).
430 * The idea is that the Class only reads those, while the LLDD,
431 * can R/W these (thus avoiding a race).
432 */
433static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
434{
435 phy->oob_mode = OOB_NOT_CONNECTED;
436 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
437}
438
439static inline unsigned int to_sas_gpio_od(int device, int bit)
440{
441 return 3 * device + bit;
442}
443
444static inline void sas_put_local_phy(struct sas_phy *phy)
445{
446 put_device(&phy->dev);
447}
448
449#ifdef CONFIG_SCSI_SAS_HOST_SMP
450int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
451#else
452static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
453{
454 return -1;
455}
456#endif
457
458/* ---------- Tasks ---------- */
459/*
460 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
461 exec_status | | |
462 ---------------------+---------------------+-----------------------+
463 SAM_... | X | |
464 DEV_NO_RESPONSE | X | X |
465 INTERRUPTED | X | |
466 QUEUE_FULL | | X |
467 DEVICE_UNKNOWN | | X |
468 SG_ERR | | X |
469 ---------------------+---------------------+-----------------------+
470 */
471
472enum service_response {
473 SAS_TASK_COMPLETE,
474 SAS_TASK_UNDELIVERED = -1,
475};
476
477enum exec_status {
478 /*
479 * Values 0..0x7f are used to return the SAM_STAT_* codes. To avoid
480 * 'case value not in enumerated type' compiler warnings every value
481 * returned through the exec_status enum needs an alias with the SAS_
482 * prefix here.
483 */
484 SAS_SAM_STAT_GOOD = SAM_STAT_GOOD,
485 SAS_SAM_STAT_BUSY = SAM_STAT_BUSY,
486 SAS_SAM_STAT_TASK_ABORTED = SAM_STAT_TASK_ABORTED,
487 SAS_SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
488
489 SAS_DEV_NO_RESPONSE = 0x80,
490 SAS_DATA_UNDERRUN,
491 SAS_DATA_OVERRUN,
492 SAS_INTERRUPTED,
493 SAS_QUEUE_FULL,
494 SAS_DEVICE_UNKNOWN,
495 SAS_OPEN_REJECT,
496 SAS_OPEN_TO,
497 SAS_PROTO_RESPONSE,
498 SAS_PHY_DOWN,
499 SAS_NAK_R_ERR,
500 SAS_PENDING,
501 SAS_ABORTED_TASK,
502};
503
504/* When a task finishes with a response, the LLDD examines the
505 * response:
506 * - For an ATA task task_status_struct::stat is set to
507 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
508 * contents of struct ata_task_resp.
509 * - For SSP tasks, if no data is present or status/TMF response
510 * is valid, task_status_struct::stat is set. If data is present
511 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
512 * task_status_struct::buf_valid_size, and task_status_struct::stat is
513 * set to SAM_CHECK_COND.
514 *
515 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
516 * for ATA task.
517 *
518 * "frame_len" is the total frame length, which could be more or less
519 * than actually copied.
520 *
521 * Tasks ending with response, always set the residual field.
522 */
523struct ata_task_resp {
524 u16 frame_len;
525 u8 ending_fis[ATA_RESP_FIS_SIZE]; /* dev to host or data-in */
526};
527
528#define SAS_STATUS_BUF_SIZE 96
529
530struct task_status_struct {
531 enum service_response resp;
532 enum exec_status stat;
533 int buf_valid_size;
534
535 u8 buf[SAS_STATUS_BUF_SIZE];
536
537 u32 residual;
538 enum sas_open_rej_reason open_rej_reason;
539};
540
541/* ATA and ATAPI task queuable to a SAS LLDD.
542 */
543struct sas_ata_task {
544 struct host_to_dev_fis fis;
545 u8 atapi_packet[16]; /* 0 if not ATAPI task */
546
547 u8 retry_count; /* hardware retry, should be > 0 */
548
549 u8 dma_xfer:1; /* PIO:0 or DMA:1 */
550 u8 use_ncq:1;
551 u8 set_affil_pol:1;
552 u8 stp_affil_pol:1;
553
554 u8 device_control_reg_update:1;
555
556 bool force_phy;
557 int force_phy_id;
558};
559
560/* LLDDs rely on these values */
561enum sas_internal_abort {
562 SAS_INTERNAL_ABORT_SINGLE = 0,
563 SAS_INTERNAL_ABORT_DEV = 1,
564};
565
566struct sas_internal_abort_task {
567 enum sas_internal_abort type;
568 unsigned int qid;
569 u16 tag;
570};
571
572struct sas_smp_task {
573 struct scatterlist smp_req;
574 struct scatterlist smp_resp;
575};
576
577enum task_attribute {
578 TASK_ATTR_SIMPLE = 0,
579 TASK_ATTR_HOQ = 1,
580 TASK_ATTR_ORDERED= 2,
581 TASK_ATTR_ACA = 4,
582};
583
584struct 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 struct scsi_cmnd *cmd;
592};
593
594struct sas_tmf_task {
595 u8 tmf;
596 u16 tag_of_task_to_be_managed;
597};
598
599struct sas_task {
600 struct domain_device *dev;
601
602 spinlock_t task_state_lock;
603 unsigned task_state_flags;
604
605 enum sas_protocol task_proto;
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 struct sas_internal_abort_task abort_task;
612 };
613
614 struct scatterlist *scatter;
615 int num_scatter;
616 u32 total_xfer_len;
617 u8 data_dir:2; /* Use PCI_DMA_... */
618
619 struct task_status_struct task_status;
620 void (*task_done)(struct sas_task *);
621
622 void *lldd_task; /* for use by LLDDs */
623 void *uldd_task;
624 struct sas_task_slow *slow_task;
625 struct sas_tmf_task *tmf;
626};
627
628struct sas_task_slow {
629 /* standard/extra infrastructure for slow path commands (SMP and
630 * internal lldd commands
631 */
632 struct timer_list timer;
633 struct completion completion;
634 struct sas_task *task;
635};
636
637#define SAS_TASK_STATE_PENDING 1
638#define SAS_TASK_STATE_DONE 2
639#define SAS_TASK_STATE_ABORTED 4
640#define SAS_TASK_NEED_DEV_RESET 8
641
642static inline bool sas_is_internal_abort(struct sas_task *task)
643{
644 return task->task_proto == SAS_PROTOCOL_INTERNAL_ABORT;
645}
646
647static inline struct request *sas_task_find_rq(struct sas_task *task)
648{
649 struct scsi_cmnd *scmd;
650
651 if (task->task_proto & SAS_PROTOCOL_STP_ALL) {
652 struct ata_queued_cmd *qc = task->uldd_task;
653
654 scmd = qc ? qc->scsicmd : NULL;
655 } else {
656 scmd = task->uldd_task;
657 }
658
659 if (!scmd)
660 return NULL;
661
662 return scsi_cmd_to_rq(scmd);
663}
664
665struct sas_domain_function_template {
666 /* The class calls these to notify the LLDD of an event. */
667 void (*lldd_port_formed)(struct asd_sas_phy *);
668 void (*lldd_port_deformed)(struct asd_sas_phy *);
669
670 /* The class calls these when a device is found or gone. */
671 int (*lldd_dev_found)(struct domain_device *);
672 void (*lldd_dev_gone)(struct domain_device *);
673
674 int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
675
676 /* Task Management Functions. Must be called from process context. */
677 int (*lldd_abort_task)(struct sas_task *);
678 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
679 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
680 int (*lldd_I_T_nexus_reset)(struct domain_device *);
681 int (*lldd_ata_check_ready)(struct domain_device *);
682 void (*lldd_ata_set_dmamode)(struct domain_device *);
683 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
684 int (*lldd_query_task)(struct sas_task *);
685
686 /* Special TMF callbacks */
687 void (*lldd_tmf_exec_complete)(struct domain_device *dev);
688 void (*lldd_tmf_aborted)(struct sas_task *task);
689 bool (*lldd_abort_timeout)(struct sas_task *task, void *data);
690
691 /* Port and Adapter management */
692 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
693 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
694
695 /* Phy management */
696 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
697
698 /* GPIO support */
699 int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
700 u8 reg_index, u8 reg_count, u8 *write_data);
701};
702
703extern int sas_register_ha(struct sas_ha_struct *);
704extern int sas_unregister_ha(struct sas_ha_struct *);
705extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
706extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
707extern void sas_resume_ha_no_sync(struct sas_ha_struct *sas_ha);
708extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
709
710int sas_set_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates);
711int sas_phy_reset(struct sas_phy *phy, int hard_reset);
712int sas_phy_enable(struct sas_phy *phy, int enable);
713extern int sas_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
714extern int sas_target_alloc(struct scsi_target *);
715extern int sas_slave_configure(struct scsi_device *);
716extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
717extern int sas_bios_param(struct scsi_device *, struct block_device *,
718 sector_t capacity, int *hsc);
719int sas_execute_internal_abort_single(struct domain_device *device,
720 u16 tag, unsigned int qid,
721 void *data);
722int sas_execute_internal_abort_dev(struct domain_device *device,
723 unsigned int qid, void *data);
724extern struct scsi_transport_template *
725sas_domain_attach_transport(struct sas_domain_function_template *);
726extern struct device_attribute dev_attr_phy_event_threshold;
727
728int sas_discover_root_expander(struct domain_device *);
729
730void sas_init_ex_attr(void);
731
732int sas_ex_revalidate_domain(struct domain_device *);
733
734void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
735void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
736void sas_discover_event(struct asd_sas_port *, enum discover_event ev);
737
738int sas_discover_sata(struct domain_device *);
739int sas_discover_end_dev(struct domain_device *);
740
741void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
742
743void sas_init_dev(struct domain_device *);
744
745void sas_task_abort(struct sas_task *);
746int sas_eh_abort_handler(struct scsi_cmnd *cmd);
747int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
748int sas_eh_target_reset_handler(struct scsi_cmnd *cmd);
749
750extern void sas_target_destroy(struct scsi_target *);
751extern int sas_slave_alloc(struct scsi_device *);
752extern int sas_ioctl(struct scsi_device *sdev, unsigned int cmd,
753 void __user *arg);
754extern int sas_drain_work(struct sas_ha_struct *ha);
755
756extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
757 struct ssp_response_iu *iu);
758struct sas_phy *sas_get_local_phy(struct domain_device *dev);
759
760int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
761
762int sas_abort_task_set(struct domain_device *dev, u8 *lun);
763int sas_clear_task_set(struct domain_device *dev, u8 *lun);
764int sas_lu_reset(struct domain_device *dev, u8 *lun);
765int sas_query_task(struct sas_task *task, u16 tag);
766int sas_abort_task(struct sas_task *task, u16 tag);
767int sas_find_attached_phy_id(struct expander_device *ex_dev,
768 struct domain_device *dev);
769
770void sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
771 gfp_t gfp_flags);
772void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event,
773 gfp_t gfp_flags);
774
775#endif /* _SASLIB_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
41struct block_device;
42
43enum sas_class {
44 SAS,
45 EXPANDER
46};
47
48enum sas_phy_role {
49 PHY_ROLE_NONE = 0,
50 PHY_ROLE_TARGET = 0x40,
51 PHY_ROLE_INITIATOR = 0x80,
52};
53
54enum 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 */
63enum ha_event {
64 HAE_RESET = 0U,
65 HA_NUM_EVENTS = 1,
66};
67
68enum 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
77enum 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 PHYE_RESUME_TIMEOUT = 4,
83 PHY_NUM_EVENTS = 5,
84};
85
86enum discover_event {
87 DISCE_DISCOVER_DOMAIN = 0U,
88 DISCE_REVALIDATE_DOMAIN = 1,
89 DISCE_PORT_GONE = 2,
90 DISCE_PROBE = 3,
91 DISCE_SUSPEND = 4,
92 DISCE_RESUME = 5,
93 DISCE_DESTRUCT = 6,
94 DISC_NUM_EVENTS = 7,
95};
96
97/* ---------- Expander Devices ---------- */
98
99#define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
100#define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\
101 attr)
102
103enum routing_attribute {
104 DIRECT_ROUTING,
105 SUBTRACTIVE_ROUTING,
106 TABLE_ROUTING,
107};
108
109enum ex_phy_state {
110 PHY_EMPTY,
111 PHY_VACANT,
112 PHY_NOT_PRESENT,
113 PHY_DEVICE_DISCOVERED
114};
115
116struct ex_phy {
117 int phy_id;
118
119 enum ex_phy_state phy_state;
120
121 enum sas_device_type attached_dev_type;
122 enum sas_linkrate linkrate;
123
124 u8 attached_sata_host:1;
125 u8 attached_sata_dev:1;
126 u8 attached_sata_ps:1;
127
128 enum sas_protocol attached_tproto;
129 enum sas_protocol attached_iproto;
130
131 u8 attached_sas_addr[SAS_ADDR_SIZE];
132 u8 attached_phy_id;
133
134 int phy_change_count;
135 enum routing_attribute routing_attr;
136 u8 virtual:1;
137
138 int last_da_index;
139
140 struct sas_phy *phy;
141 struct sas_port *port;
142};
143
144struct expander_device {
145 struct list_head children;
146
147 int ex_change_count;
148 u16 max_route_indexes;
149 u8 num_phys;
150
151 u8 t2t_supp:1;
152 u8 configuring:1;
153 u8 conf_route_table:1;
154
155 u8 enclosure_logical_id[8];
156
157 struct ex_phy *ex_phy;
158 struct sas_port *parent_port;
159
160 struct mutex cmd_mutex;
161};
162
163/* ---------- SATA device ---------- */
164enum ata_command_set {
165 ATA_COMMAND_SET = 0,
166 ATAPI_COMMAND_SET = 1,
167};
168
169#define ATA_RESP_FIS_SIZE 24
170
171struct sata_device {
172 enum ata_command_set command_set;
173 struct smp_resp rps_resp; /* report_phy_sata_resp */
174 u8 port_no; /* port number, if this is a PM (Port) */
175
176 struct ata_port *ap;
177 struct ata_host ata_host;
178 u8 fis[ATA_RESP_FIS_SIZE];
179};
180
181struct ssp_device {
182 struct list_head eh_list_node; /* pending a user requested eh action */
183 struct scsi_lun reset_lun;
184};
185
186enum {
187 SAS_DEV_GONE,
188 SAS_DEV_FOUND, /* device notified to lldd */
189 SAS_DEV_DESTROY,
190 SAS_DEV_EH_PENDING,
191 SAS_DEV_LU_RESET,
192 SAS_DEV_RESET,
193};
194
195struct domain_device {
196 spinlock_t done_lock;
197 enum sas_device_type dev_type;
198
199 enum sas_linkrate linkrate;
200 enum sas_linkrate min_linkrate;
201 enum sas_linkrate max_linkrate;
202
203 int pathways;
204
205 struct domain_device *parent;
206 struct list_head siblings; /* devices on the same level */
207 struct asd_sas_port *port; /* shortcut to root of the tree */
208 struct sas_phy *phy;
209
210 struct list_head dev_list_node;
211 struct list_head disco_list_node; /* awaiting probe or destruct */
212
213 enum sas_protocol iproto;
214 enum sas_protocol tproto;
215
216 struct sas_rphy *rphy;
217
218 u8 sas_addr[SAS_ADDR_SIZE];
219 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
220
221 u8 frame_rcvd[32];
222
223 union {
224 struct expander_device ex_dev;
225 struct sata_device sata_dev; /* STP & directly attached */
226 struct ssp_device ssp_dev;
227 };
228
229 void *lldd_dev;
230 unsigned long state;
231 struct kref kref;
232};
233
234struct sas_work {
235 struct list_head drain_node;
236 struct work_struct work;
237};
238
239static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
240{
241 INIT_WORK(&sw->work, fn);
242 INIT_LIST_HEAD(&sw->drain_node);
243}
244
245struct sas_discovery_event {
246 struct sas_work work;
247 struct asd_sas_port *port;
248};
249
250static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
251{
252 struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
253
254 return ev;
255}
256
257struct sas_discovery {
258 struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
259 unsigned long pending;
260 u8 fanout_sas_addr[8];
261 u8 eeds_a[8];
262 u8 eeds_b[8];
263 int max_level;
264};
265
266/* The port struct is Class:RW, driver:RO */
267struct asd_sas_port {
268/* private: */
269 struct completion port_gone_completion;
270
271 struct sas_discovery disc;
272 struct domain_device *port_dev;
273 spinlock_t dev_list_lock;
274 struct list_head dev_list;
275 struct list_head disco_list;
276 struct list_head destroy_list;
277 enum sas_linkrate linkrate;
278
279 struct sas_work work;
280 int suspended;
281
282/* public: */
283 int id;
284
285 enum sas_class class;
286 u8 sas_addr[SAS_ADDR_SIZE];
287 u8 attached_sas_addr[SAS_ADDR_SIZE];
288 enum sas_protocol iproto;
289 enum sas_protocol tproto;
290
291 enum sas_oob_mode oob_mode;
292
293 spinlock_t phy_list_lock;
294 struct list_head phy_list;
295 int num_phys;
296 u32 phy_mask;
297
298 struct sas_ha_struct *ha;
299
300 struct sas_port *port;
301
302 void *lldd_port; /* not touched by the sas class code */
303};
304
305struct asd_sas_event {
306 struct sas_work work;
307 struct asd_sas_phy *phy;
308};
309
310static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
311{
312 struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
313
314 return ev;
315}
316
317/* The phy pretty much is controlled by the LLDD.
318 * The class only reads those fields.
319 */
320struct asd_sas_phy {
321/* private: */
322 struct asd_sas_event port_events[PORT_NUM_EVENTS];
323 struct asd_sas_event phy_events[PHY_NUM_EVENTS];
324
325 unsigned long port_events_pending;
326 unsigned long phy_events_pending;
327
328 int error;
329 int suspended;
330
331 struct sas_phy *phy;
332
333/* public: */
334 /* The following are class:RO, driver:R/W */
335 int enabled; /* must be set */
336
337 int id; /* must be set */
338 enum sas_class class;
339 enum sas_protocol iproto;
340 enum sas_protocol tproto;
341
342 enum sas_phy_type type;
343 enum sas_phy_role role;
344 enum sas_oob_mode oob_mode;
345 enum sas_linkrate linkrate;
346
347 u8 *sas_addr; /* must be set */
348 u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
349
350 spinlock_t frame_rcvd_lock;
351 u8 *frame_rcvd; /* must be set */
352 int frame_rcvd_size;
353
354 spinlock_t sas_prim_lock;
355 u32 sas_prim;
356
357 struct list_head port_phy_el; /* driver:RO */
358 struct asd_sas_port *port; /* Class:RW, driver: RO */
359
360 struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
361
362 void *lldd_phy; /* not touched by the sas_class_code */
363};
364
365struct scsi_core {
366 struct Scsi_Host *shost;
367
368 struct mutex task_queue_flush;
369 spinlock_t task_queue_lock;
370 struct list_head task_queue;
371 int task_queue_size;
372
373 struct task_struct *queue_thread;
374};
375
376struct sas_ha_event {
377 struct sas_work work;
378 struct sas_ha_struct *ha;
379};
380
381static inline struct sas_ha_event *to_sas_ha_event(struct work_struct *work)
382{
383 struct sas_ha_event *ev = container_of(work, typeof(*ev), work.work);
384
385 return ev;
386}
387
388enum sas_ha_state {
389 SAS_HA_REGISTERED,
390 SAS_HA_DRAINING,
391 SAS_HA_ATA_EH_ACTIVE,
392 SAS_HA_FROZEN,
393};
394
395struct sas_ha_struct {
396/* private: */
397 struct sas_ha_event ha_events[HA_NUM_EVENTS];
398 unsigned long pending;
399
400 struct list_head defer_q; /* work queued while draining */
401 struct mutex drain_mutex;
402 unsigned long state;
403 spinlock_t lock;
404 int eh_active;
405 wait_queue_head_t eh_wait_q;
406 struct list_head eh_dev_q;
407
408 struct mutex disco_mutex;
409
410 struct scsi_core core;
411
412/* public: */
413 char *sas_ha_name;
414 struct device *dev; /* should be set */
415 struct module *lldd_module; /* should be set */
416
417 u8 *sas_addr; /* must be set */
418 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
419
420 spinlock_t phy_port_lock;
421 struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
422 struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
423 int num_phys; /* must be set, gt 0, static */
424
425 /* The class calls this to send a task for execution. */
426 int lldd_max_execute_num;
427 int lldd_queue_size;
428 int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
429 * their siblings when forming wide ports */
430
431 /* LLDD calls these to notify the class of an event. */
432 void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
433 void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
434 void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
435
436 void *lldd_ha; /* not touched by sas class code */
437
438 struct list_head eh_done_q; /* complete via scsi_eh_flush_done_q */
439 struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
440};
441
442#define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
443
444static inline struct domain_device *
445starget_to_domain_dev(struct scsi_target *starget) {
446 return starget->hostdata;
447}
448
449static inline struct domain_device *
450sdev_to_domain_dev(struct scsi_device *sdev) {
451 return starget_to_domain_dev(sdev->sdev_target);
452}
453
454static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
455{
456 return &dev->sata_dev.ap->link.device[0];
457}
458
459static inline struct domain_device *
460cmd_to_domain_dev(struct scsi_cmnd *cmd)
461{
462 return sdev_to_domain_dev(cmd->device);
463}
464
465void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
466
467/* Before calling a notify event, LLDD should use this function
468 * when the link is severed (possibly from its tasklet).
469 * The idea is that the Class only reads those, while the LLDD,
470 * can R/W these (thus avoiding a race).
471 */
472static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
473{
474 phy->oob_mode = OOB_NOT_CONNECTED;
475 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
476}
477
478static inline unsigned int to_sas_gpio_od(int device, int bit)
479{
480 return 3 * device + bit;
481}
482
483static inline void sas_put_local_phy(struct sas_phy *phy)
484{
485 put_device(&phy->dev);
486}
487
488#ifdef CONFIG_SCSI_SAS_HOST_SMP
489int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
490#else
491static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
492{
493 return -1;
494}
495#endif
496
497/* ---------- Tasks ---------- */
498/*
499 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
500 exec_status | | |
501 ---------------------+---------------------+-----------------------+
502 SAM_... | X | |
503 DEV_NO_RESPONSE | X | X |
504 INTERRUPTED | X | |
505 QUEUE_FULL | | X |
506 DEVICE_UNKNOWN | | X |
507 SG_ERR | | X |
508 ---------------------+---------------------+-----------------------+
509 */
510
511enum service_response {
512 SAS_TASK_COMPLETE,
513 SAS_TASK_UNDELIVERED = -1,
514};
515
516enum exec_status {
517 /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
518 * them here to silence 'case value not in enumerated type' warnings
519 */
520 __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
521
522 SAS_DEV_NO_RESPONSE = 0x80,
523 SAS_DATA_UNDERRUN,
524 SAS_DATA_OVERRUN,
525 SAS_INTERRUPTED,
526 SAS_QUEUE_FULL,
527 SAS_DEVICE_UNKNOWN,
528 SAS_SG_ERR,
529 SAS_OPEN_REJECT,
530 SAS_OPEN_TO,
531 SAS_PROTO_RESPONSE,
532 SAS_PHY_DOWN,
533 SAS_NAK_R_ERR,
534 SAS_PENDING,
535 SAS_ABORTED_TASK,
536};
537
538/* When a task finishes with a response, the LLDD examines the
539 * response:
540 * - For an ATA task task_status_struct::stat is set to
541 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
542 * contents of struct ata_task_resp.
543 * - For SSP tasks, if no data is present or status/TMF response
544 * is valid, task_status_struct::stat is set. If data is present
545 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
546 * task_status_struct::buf_valid_size, and task_status_struct::stat is
547 * set to SAM_CHECK_COND.
548 *
549 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
550 * for ATA task.
551 *
552 * "frame_len" is the total frame length, which could be more or less
553 * than actually copied.
554 *
555 * Tasks ending with response, always set the residual field.
556 */
557struct ata_task_resp {
558 u16 frame_len;
559 u8 ending_fis[ATA_RESP_FIS_SIZE]; /* dev to host or data-in */
560};
561
562#define SAS_STATUS_BUF_SIZE 96
563
564struct task_status_struct {
565 enum service_response resp;
566 enum exec_status stat;
567 int buf_valid_size;
568
569 u8 buf[SAS_STATUS_BUF_SIZE];
570
571 u32 residual;
572 enum sas_open_rej_reason open_rej_reason;
573};
574
575/* ATA and ATAPI task queuable to a SAS LLDD.
576 */
577struct sas_ata_task {
578 struct host_to_dev_fis fis;
579 u8 atapi_packet[16]; /* 0 if not ATAPI task */
580
581 u8 retry_count; /* hardware retry, should be > 0 */
582
583 u8 dma_xfer:1; /* PIO:0 or DMA:1 */
584 u8 use_ncq:1;
585 u8 set_affil_pol:1;
586 u8 stp_affil_pol:1;
587
588 u8 device_control_reg_update:1;
589};
590
591struct sas_smp_task {
592 struct scatterlist smp_req;
593 struct scatterlist smp_resp;
594};
595
596enum task_attribute {
597 TASK_ATTR_SIMPLE = 0,
598 TASK_ATTR_HOQ = 1,
599 TASK_ATTR_ORDERED= 2,
600 TASK_ATTR_ACA = 4,
601};
602
603struct sas_ssp_task {
604 u8 retry_count; /* hardware retry, should be > 0 */
605
606 u8 LUN[8];
607 u8 enable_first_burst:1;
608 enum task_attribute task_attr;
609 u8 task_prio;
610 struct scsi_cmnd *cmd;
611};
612
613struct sas_task {
614 struct domain_device *dev;
615 struct list_head list;
616
617 spinlock_t task_state_lock;
618 unsigned task_state_flags;
619
620 enum sas_protocol task_proto;
621
622 union {
623 struct sas_ata_task ata_task;
624 struct sas_smp_task smp_task;
625 struct sas_ssp_task ssp_task;
626 };
627
628 struct scatterlist *scatter;
629 int num_scatter;
630 u32 total_xfer_len;
631 u8 data_dir:2; /* Use PCI_DMA_... */
632
633 struct task_status_struct task_status;
634 void (*task_done)(struct sas_task *);
635
636 void *lldd_task; /* for use by LLDDs */
637 void *uldd_task;
638 struct sas_task_slow *slow_task;
639};
640
641struct sas_task_slow {
642 /* standard/extra infrastructure for slow path commands (SMP and
643 * internal lldd commands
644 */
645 struct timer_list timer;
646 struct completion completion;
647};
648
649#define SAS_TASK_STATE_PENDING 1
650#define SAS_TASK_STATE_DONE 2
651#define SAS_TASK_STATE_ABORTED 4
652#define SAS_TASK_NEED_DEV_RESET 8
653#define SAS_TASK_AT_INITIATOR 16
654
655extern struct sas_task *sas_alloc_task(gfp_t flags);
656extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
657extern void sas_free_task(struct sas_task *task);
658
659struct sas_domain_function_template {
660 /* The class calls these to notify the LLDD of an event. */
661 void (*lldd_port_formed)(struct asd_sas_phy *);
662 void (*lldd_port_deformed)(struct asd_sas_phy *);
663
664 /* The class calls these when a device is found or gone. */
665 int (*lldd_dev_found)(struct domain_device *);
666 void (*lldd_dev_gone)(struct domain_device *);
667
668 int (*lldd_execute_task)(struct sas_task *, int num,
669 gfp_t gfp_flags);
670
671 /* Task Management Functions. Must be called from process context. */
672 int (*lldd_abort_task)(struct sas_task *);
673 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
674 int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
675 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
676 int (*lldd_I_T_nexus_reset)(struct domain_device *);
677 int (*lldd_ata_check_ready)(struct domain_device *);
678 void (*lldd_ata_set_dmamode)(struct domain_device *);
679 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
680 int (*lldd_query_task)(struct sas_task *);
681
682 /* Port and Adapter management */
683 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
684 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
685
686 /* Phy management */
687 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
688
689 /* GPIO support */
690 int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
691 u8 reg_index, u8 reg_count, u8 *write_data);
692};
693
694extern int sas_register_ha(struct sas_ha_struct *);
695extern int sas_unregister_ha(struct sas_ha_struct *);
696extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
697extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
698extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
699
700int sas_set_phy_speed(struct sas_phy *phy,
701 struct sas_phy_linkrates *rates);
702int sas_phy_reset(struct sas_phy *phy, int hard_reset);
703int sas_queue_up(struct sas_task *task);
704extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
705extern int sas_target_alloc(struct scsi_target *);
706extern int sas_slave_configure(struct scsi_device *);
707extern int sas_change_queue_depth(struct scsi_device *, int new_depth,
708 int reason);
709extern int sas_change_queue_type(struct scsi_device *, int qt);
710extern int sas_bios_param(struct scsi_device *,
711 struct block_device *,
712 sector_t capacity, int *hsc);
713extern struct scsi_transport_template *
714sas_domain_attach_transport(struct sas_domain_function_template *);
715extern void sas_domain_release_transport(struct scsi_transport_template *);
716
717int sas_discover_root_expander(struct domain_device *);
718
719void sas_init_ex_attr(void);
720
721int sas_ex_revalidate_domain(struct domain_device *);
722
723void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
724void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
725int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
726
727int sas_discover_sata(struct domain_device *);
728int sas_discover_end_dev(struct domain_device *);
729
730void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
731
732void sas_init_dev(struct domain_device *);
733
734void sas_task_abort(struct sas_task *);
735int sas_eh_abort_handler(struct scsi_cmnd *cmd);
736int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
737int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
738
739extern void sas_target_destroy(struct scsi_target *);
740extern int sas_slave_alloc(struct scsi_device *);
741extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
742extern int sas_drain_work(struct sas_ha_struct *ha);
743
744extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
745 struct request *req);
746
747extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
748 struct ssp_response_iu *iu);
749struct sas_phy *sas_get_local_phy(struct domain_device *dev);
750
751int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
752
753#endif /* _SASLIB_H_ */