xref: /linux/include/scsi/libsas.h (revision b889fcf63cb62e7fdb7816565e28f44dbe4a76a5)
1 /*
2  * SAS host prototypes and structures header file
3  *
4  * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
5  * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
6  *
7  * This file is licensed under GPLv2.
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License as
11  * published by the Free Software Foundation; either version 2 of the
12  * License, or (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  * General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
22  * USA
23  *
24  */
25 
26 #ifndef _LIBSAS_H_
27 #define _LIBSAS_H_
28 
29 
30 #include <linux/timer.h>
31 #include <linux/pci.h>
32 #include <scsi/sas.h>
33 #include <linux/libata.h>
34 #include <linux/list.h>
35 #include <scsi/scsi_device.h>
36 #include <scsi/scsi_cmnd.h>
37 #include <scsi/scsi_transport_sas.h>
38 #include <linux/scatterlist.h>
39 #include <linux/slab.h>
40 
41 struct block_device;
42 
43 enum sas_class {
44 	SAS,
45 	EXPANDER
46 };
47 
48 enum sas_phy_role {
49 	PHY_ROLE_NONE = 0,
50 	PHY_ROLE_TARGET = 0x40,
51 	PHY_ROLE_INITIATOR = 0x80,
52 };
53 
54 enum sas_phy_type {
55         PHY_TYPE_PHYSICAL,
56         PHY_TYPE_VIRTUAL
57 };
58 
59 /* The events are mnemonically described in sas_dump.c
60  * so when updating/adding events here, please also
61  * update the other file too.
62  */
63 enum ha_event {
64 	HAE_RESET             = 0U,
65 	HA_NUM_EVENTS         = 1,
66 };
67 
68 enum port_event {
69 	PORTE_BYTES_DMAED     = 0U,
70 	PORTE_BROADCAST_RCVD  = 1,
71 	PORTE_LINK_RESET_ERR  = 2,
72 	PORTE_TIMER_EVENT     = 3,
73 	PORTE_HARD_RESET      = 4,
74 	PORT_NUM_EVENTS       = 5,
75 };
76 
77 enum phy_event {
78 	PHYE_LOSS_OF_SIGNAL   = 0U,
79 	PHYE_OOB_DONE         = 1,
80 	PHYE_OOB_ERROR        = 2,
81 	PHYE_SPINUP_HOLD      = 3, /* hot plug SATA, no COMWAKE sent */
82 	PHYE_RESUME_TIMEOUT   = 4,
83 	PHY_NUM_EVENTS        = 5,
84 };
85 
86 enum 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 
103 enum routing_attribute {
104 	DIRECT_ROUTING,
105 	SUBTRACTIVE_ROUTING,
106 	TABLE_ROUTING,
107 };
108 
109 enum ex_phy_state {
110 	PHY_EMPTY,
111 	PHY_VACANT,
112 	PHY_NOT_PRESENT,
113 	PHY_DEVICE_DISCOVERED
114 };
115 
116 struct ex_phy {
117 	int    phy_id;
118 
119 	enum ex_phy_state phy_state;
120 
121 	enum sas_dev_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 
144 struct 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 ---------- */
164 enum ata_command_set {
165         ATA_COMMAND_SET   = 0,
166         ATAPI_COMMAND_SET = 1,
167 };
168 
169 #define ATA_RESP_FIS_SIZE 24
170 
171 struct 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 	int    pm_result;
176 
177 	struct ata_port *ap;
178 	struct ata_host ata_host;
179 	u8     fis[ATA_RESP_FIS_SIZE];
180 };
181 
182 struct ssp_device {
183 	struct list_head eh_list_node; /* pending a user requested eh action */
184 	struct scsi_lun reset_lun;
185 };
186 
187 enum {
188 	SAS_DEV_GONE,
189 	SAS_DEV_FOUND, /* device notified to lldd */
190 	SAS_DEV_DESTROY,
191 	SAS_DEV_EH_PENDING,
192 	SAS_DEV_LU_RESET,
193 	SAS_DEV_RESET,
194 };
195 
196 struct domain_device {
197 	spinlock_t done_lock;
198         enum sas_dev_type dev_type;
199 
200         enum sas_linkrate linkrate;
201         enum sas_linkrate min_linkrate;
202         enum sas_linkrate max_linkrate;
203 
204         int  pathways;
205 
206         struct domain_device *parent;
207         struct list_head siblings; /* devices on the same level */
208         struct asd_sas_port *port;        /* shortcut to root of the tree */
209 	struct sas_phy *phy;
210 
211         struct list_head dev_list_node;
212 	struct list_head disco_list_node; /* awaiting probe or destruct */
213 
214         enum sas_protocol    iproto;
215         enum sas_protocol    tproto;
216 
217         struct sas_rphy *rphy;
218 
219         u8  sas_addr[SAS_ADDR_SIZE];
220         u8  hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
221 
222         u8  frame_rcvd[32];
223 
224         union {
225                 struct expander_device ex_dev;
226                 struct sata_device     sata_dev; /* STP & directly attached */
227 		struct ssp_device      ssp_dev;
228         };
229 
230         void *lldd_dev;
231 	unsigned long state;
232 	struct kref kref;
233 };
234 
235 struct sas_work {
236 	struct list_head drain_node;
237 	struct work_struct work;
238 };
239 
240 static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
241 {
242 	INIT_WORK(&sw->work, fn);
243 	INIT_LIST_HEAD(&sw->drain_node);
244 }
245 
246 struct sas_discovery_event {
247 	struct sas_work work;
248 	struct asd_sas_port *port;
249 };
250 
251 static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
252 {
253 	struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
254 
255 	return ev;
256 }
257 
258 struct sas_discovery {
259 	struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
260 	unsigned long    pending;
261 	u8     fanout_sas_addr[8];
262 	u8     eeds_a[8];
263 	u8     eeds_b[8];
264 	int    max_level;
265 };
266 
267 /* The port struct is Class:RW, driver:RO */
268 struct asd_sas_port {
269 /* private: */
270 	struct completion port_gone_completion;
271 
272 	struct sas_discovery disc;
273 	struct domain_device *port_dev;
274 	spinlock_t dev_list_lock;
275 	struct list_head dev_list;
276 	struct list_head disco_list;
277 	struct list_head destroy_list;
278 	enum   sas_linkrate linkrate;
279 
280 	struct sas_work work;
281 	int suspended;
282 
283 /* public: */
284 	int id;
285 
286 	enum sas_class   class;
287 	u8               sas_addr[SAS_ADDR_SIZE];
288 	u8               attached_sas_addr[SAS_ADDR_SIZE];
289 	enum sas_protocol   iproto;
290 	enum sas_protocol   tproto;
291 
292 	enum sas_oob_mode oob_mode;
293 
294 	spinlock_t       phy_list_lock;
295 	struct list_head phy_list;
296 	int              num_phys;
297 	u32              phy_mask;
298 
299 	struct sas_ha_struct *ha;
300 
301 	struct sas_port	*port;
302 
303 	void *lldd_port;	  /* not touched by the sas class code */
304 };
305 
306 struct asd_sas_event {
307 	struct sas_work work;
308 	struct asd_sas_phy *phy;
309 };
310 
311 static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
312 {
313 	struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
314 
315 	return ev;
316 }
317 
318 /* The phy pretty much is controlled by the LLDD.
319  * The class only reads those fields.
320  */
321 struct asd_sas_phy {
322 /* private: */
323 	struct asd_sas_event   port_events[PORT_NUM_EVENTS];
324 	struct asd_sas_event   phy_events[PHY_NUM_EVENTS];
325 
326 	unsigned long port_events_pending;
327 	unsigned long phy_events_pending;
328 
329 	int error;
330 	int suspended;
331 
332 	struct sas_phy *phy;
333 
334 /* public: */
335 	/* The following are class:RO, driver:R/W */
336 	int            enabled;	  /* must be set */
337 
338 	int            id;	  /* must be set */
339 	enum sas_class class;
340 	enum sas_protocol iproto;
341 	enum sas_protocol tproto;
342 
343 	enum sas_phy_type  type;
344 	enum sas_phy_role  role;
345 	enum sas_oob_mode  oob_mode;
346 	enum sas_linkrate linkrate;
347 
348 	u8   *sas_addr;		  /* must be set */
349 	u8   attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
350 
351 	spinlock_t     frame_rcvd_lock;
352 	u8             *frame_rcvd; /* must be set */
353 	int            frame_rcvd_size;
354 
355 	spinlock_t     sas_prim_lock;
356 	u32            sas_prim;
357 
358 	struct list_head port_phy_el; /* driver:RO */
359 	struct asd_sas_port      *port; /* Class:RW, driver: RO */
360 
361 	struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
362 
363 	void *lldd_phy;		  /* not touched by the sas_class_code */
364 };
365 
366 struct scsi_core {
367 	struct Scsi_Host *shost;
368 
369 	struct mutex	  task_queue_flush;
370 	spinlock_t        task_queue_lock;
371 	struct list_head  task_queue;
372 	int               task_queue_size;
373 
374 	struct task_struct *queue_thread;
375 };
376 
377 struct sas_ha_event {
378 	struct sas_work work;
379 	struct sas_ha_struct *ha;
380 };
381 
382 static inline struct sas_ha_event *to_sas_ha_event(struct work_struct *work)
383 {
384 	struct sas_ha_event *ev = container_of(work, typeof(*ev), work.work);
385 
386 	return ev;
387 }
388 
389 enum sas_ha_state {
390 	SAS_HA_REGISTERED,
391 	SAS_HA_DRAINING,
392 	SAS_HA_ATA_EH_ACTIVE,
393 	SAS_HA_FROZEN,
394 };
395 
396 struct sas_ha_struct {
397 /* private: */
398 	struct sas_ha_event ha_events[HA_NUM_EVENTS];
399 	unsigned long	 pending;
400 
401 	struct list_head  defer_q; /* work queued while draining */
402 	struct mutex	  drain_mutex;
403 	unsigned long	  state;
404 	spinlock_t	  lock;
405 	int		  eh_active;
406 	wait_queue_head_t eh_wait_q;
407 	struct list_head  eh_dev_q;
408 
409 	struct mutex disco_mutex;
410 
411 	struct scsi_core core;
412 
413 /* public: */
414 	char *sas_ha_name;
415 	struct device *dev;	  /* should be set */
416 	struct module *lldd_module; /* should be set */
417 
418 	u8 *sas_addr;		  /* must be set */
419 	u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
420 
421 	spinlock_t      phy_port_lock;
422 	struct asd_sas_phy  **sas_phy; /* array of valid pointers, must be set */
423 	struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
424 	int             num_phys; /* must be set, gt 0, static */
425 
426 	/* The class calls this to send a task for execution. */
427 	int lldd_max_execute_num;
428 	int lldd_queue_size;
429 	int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
430 				* their siblings when forming wide ports */
431 
432 	/* LLDD calls these to notify the class of an event. */
433 	void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
434 	void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
435 	void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
436 
437 	void *lldd_ha;		  /* not touched by sas class code */
438 
439 	struct list_head eh_done_q;  /* complete via scsi_eh_flush_done_q */
440 	struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
441 };
442 
443 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
444 
445 static inline struct domain_device *
446 starget_to_domain_dev(struct scsi_target *starget) {
447 	return starget->hostdata;
448 }
449 
450 static inline struct domain_device *
451 sdev_to_domain_dev(struct scsi_device *sdev) {
452 	return starget_to_domain_dev(sdev->sdev_target);
453 }
454 
455 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
456 {
457 	return &dev->sata_dev.ap->link.device[0];
458 }
459 
460 static inline struct domain_device *
461 cmd_to_domain_dev(struct scsi_cmnd *cmd)
462 {
463 	return sdev_to_domain_dev(cmd->device);
464 }
465 
466 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
467 
468 /* Before calling a notify event, LLDD should use this function
469  * when the link is severed (possibly from its tasklet).
470  * The idea is that the Class only reads those, while the LLDD,
471  * can R/W these (thus avoiding a race).
472  */
473 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
474 {
475 	phy->oob_mode = OOB_NOT_CONNECTED;
476 	phy->linkrate = SAS_LINK_RATE_UNKNOWN;
477 }
478 
479 static inline unsigned int to_sas_gpio_od(int device, int bit)
480 {
481 	return 3 * device + bit;
482 }
483 
484 static inline void sas_put_local_phy(struct sas_phy *phy)
485 {
486 	put_device(&phy->dev);
487 }
488 
489 #ifdef CONFIG_SCSI_SAS_HOST_SMP
490 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
491 #else
492 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
493 {
494 	return -1;
495 }
496 #endif
497 
498 /* ---------- Tasks ---------- */
499 /*
500       service_response |  SAS_TASK_COMPLETE  |  SAS_TASK_UNDELIVERED |
501   exec_status          |                     |                       |
502   ---------------------+---------------------+-----------------------+
503        SAM_...         |         X           |                       |
504        DEV_NO_RESPONSE |         X           |           X           |
505        INTERRUPTED     |         X           |                       |
506        QUEUE_FULL      |                     |           X           |
507        DEVICE_UNKNOWN  |                     |           X           |
508        SG_ERR          |                     |           X           |
509   ---------------------+---------------------+-----------------------+
510  */
511 
512 enum service_response {
513 	SAS_TASK_COMPLETE,
514 	SAS_TASK_UNDELIVERED = -1,
515 };
516 
517 enum exec_status {
518 	/* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
519 	 * them here to silence 'case value not in enumerated type' warnings
520 	 */
521 	__SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
522 
523 	SAS_DEV_NO_RESPONSE = 0x80,
524 	SAS_DATA_UNDERRUN,
525 	SAS_DATA_OVERRUN,
526 	SAS_INTERRUPTED,
527 	SAS_QUEUE_FULL,
528 	SAS_DEVICE_UNKNOWN,
529 	SAS_SG_ERR,
530 	SAS_OPEN_REJECT,
531 	SAS_OPEN_TO,
532 	SAS_PROTO_RESPONSE,
533 	SAS_PHY_DOWN,
534 	SAS_NAK_R_ERR,
535 	SAS_PENDING,
536 	SAS_ABORTED_TASK,
537 };
538 
539 /* When a task finishes with a response, the LLDD examines the
540  * response:
541  * 	- For an ATA task task_status_struct::stat is set to
542  * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
543  * contents of struct ata_task_resp.
544  * 	- For SSP tasks, if no data is present or status/TMF response
545  * is valid, task_status_struct::stat is set.  If data is present
546  * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
547  * task_status_struct::buf_valid_size, and task_status_struct::stat is
548  * set to SAM_CHECK_COND.
549  *
550  * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
551  * for ATA task.
552  *
553  * "frame_len" is the total frame length, which could be more or less
554  * than actually copied.
555  *
556  * Tasks ending with response, always set the residual field.
557  */
558 struct ata_task_resp {
559 	u16  frame_len;
560 	u8   ending_fis[ATA_RESP_FIS_SIZE];	  /* dev to host or data-in */
561 };
562 
563 #define SAS_STATUS_BUF_SIZE 96
564 
565 struct task_status_struct {
566 	enum service_response resp;
567 	enum exec_status      stat;
568 	int  buf_valid_size;
569 
570 	u8   buf[SAS_STATUS_BUF_SIZE];
571 
572 	u32  residual;
573 	enum sas_open_rej_reason open_rej_reason;
574 };
575 
576 /* ATA and ATAPI task queuable to a SAS LLDD.
577  */
578 struct sas_ata_task {
579 	struct host_to_dev_fis fis;
580 	u8     atapi_packet[16];  /* 0 if not ATAPI task */
581 
582 	u8     retry_count;	  /* hardware retry, should be > 0 */
583 
584 	u8     dma_xfer:1;	  /* PIO:0 or DMA:1 */
585 	u8     use_ncq:1;
586 	u8     set_affil_pol:1;
587 	u8     stp_affil_pol:1;
588 
589 	u8     device_control_reg_update:1;
590 };
591 
592 struct sas_smp_task {
593 	struct scatterlist smp_req;
594 	struct scatterlist smp_resp;
595 };
596 
597 enum task_attribute {
598 	TASK_ATTR_SIMPLE = 0,
599 	TASK_ATTR_HOQ    = 1,
600 	TASK_ATTR_ORDERED= 2,
601 	TASK_ATTR_ACA    = 4,
602 };
603 
604 struct sas_ssp_task {
605 	u8     retry_count;	  /* hardware retry, should be > 0 */
606 
607 	u8     LUN[8];
608 	u8     enable_first_burst:1;
609 	enum   task_attribute task_attr;
610 	u8     task_prio;
611 	u8     cdb[16];
612 };
613 
614 struct sas_task {
615 	struct domain_device *dev;
616 	struct list_head      list;
617 
618 	spinlock_t   task_state_lock;
619 	unsigned     task_state_flags;
620 
621 	enum   sas_protocol      task_proto;
622 
623 	union {
624 		struct sas_ata_task ata_task;
625 		struct sas_smp_task smp_task;
626 		struct sas_ssp_task ssp_task;
627 	};
628 
629 	struct scatterlist *scatter;
630 	int    num_scatter;
631 	u32    total_xfer_len;
632 	u8     data_dir:2;	  /* Use PCI_DMA_... */
633 
634 	struct task_status_struct task_status;
635 	void   (*task_done)(struct sas_task *);
636 
637 	void   *lldd_task;	  /* for use by LLDDs */
638 	void   *uldd_task;
639 	struct sas_task_slow *slow_task;
640 };
641 
642 struct sas_task_slow {
643 	/* standard/extra infrastructure for slow path commands (SMP and
644 	 * internal lldd commands
645 	 */
646 	struct timer_list     timer;
647 	struct completion     completion;
648 };
649 
650 #define SAS_TASK_STATE_PENDING      1
651 #define SAS_TASK_STATE_DONE         2
652 #define SAS_TASK_STATE_ABORTED      4
653 #define SAS_TASK_NEED_DEV_RESET     8
654 #define SAS_TASK_AT_INITIATOR       16
655 
656 extern struct sas_task *sas_alloc_task(gfp_t flags);
657 extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
658 extern void sas_free_task(struct sas_task *task);
659 
660 struct sas_domain_function_template {
661 	/* The class calls these to notify the LLDD of an event. */
662 	void (*lldd_port_formed)(struct asd_sas_phy *);
663 	void (*lldd_port_deformed)(struct asd_sas_phy *);
664 
665 	/* The class calls these when a device is found or gone. */
666 	int  (*lldd_dev_found)(struct domain_device *);
667 	void (*lldd_dev_gone)(struct domain_device *);
668 
669 	int (*lldd_execute_task)(struct sas_task *, int num,
670 				 gfp_t gfp_flags);
671 
672 	/* Task Management Functions. Must be called from process context. */
673 	int (*lldd_abort_task)(struct sas_task *);
674 	int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
675 	int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
676 	int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
677 	int (*lldd_I_T_nexus_reset)(struct domain_device *);
678 	int (*lldd_ata_check_ready)(struct domain_device *);
679 	void (*lldd_ata_set_dmamode)(struct domain_device *);
680 	int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
681 	int (*lldd_query_task)(struct sas_task *);
682 
683 	/* Port and Adapter management */
684 	int (*lldd_clear_nexus_port)(struct asd_sas_port *);
685 	int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
686 
687 	/* Phy management */
688 	int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
689 
690 	/* GPIO support */
691 	int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
692 			       u8 reg_index, u8 reg_count, u8 *write_data);
693 };
694 
695 extern int sas_register_ha(struct sas_ha_struct *);
696 extern int sas_unregister_ha(struct sas_ha_struct *);
697 extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
698 extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
699 extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
700 
701 int sas_set_phy_speed(struct sas_phy *phy,
702 		      struct sas_phy_linkrates *rates);
703 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
704 int sas_queue_up(struct sas_task *task);
705 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
706 extern int sas_target_alloc(struct scsi_target *);
707 extern int sas_slave_configure(struct scsi_device *);
708 extern int sas_change_queue_depth(struct scsi_device *, int new_depth,
709 				  int reason);
710 extern int sas_change_queue_type(struct scsi_device *, int qt);
711 extern int sas_bios_param(struct scsi_device *,
712 			  struct block_device *,
713 			  sector_t capacity, int *hsc);
714 extern struct scsi_transport_template *
715 sas_domain_attach_transport(struct sas_domain_function_template *);
716 extern void sas_domain_release_transport(struct scsi_transport_template *);
717 
718 int  sas_discover_root_expander(struct domain_device *);
719 
720 void sas_init_ex_attr(void);
721 
722 int  sas_ex_revalidate_domain(struct domain_device *);
723 
724 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
725 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
726 int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
727 
728 int  sas_discover_sata(struct domain_device *);
729 int  sas_discover_end_dev(struct domain_device *);
730 
731 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
732 
733 void sas_init_dev(struct domain_device *);
734 
735 void sas_task_abort(struct sas_task *);
736 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
737 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
738 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
739 
740 extern void sas_target_destroy(struct scsi_target *);
741 extern int sas_slave_alloc(struct scsi_device *);
742 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
743 extern int sas_drain_work(struct sas_ha_struct *ha);
744 
745 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
746 			   struct request *req);
747 
748 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
749 				  struct ssp_response_iu *iu);
750 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
751 
752 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
753 
754 #endif /* _SASLIB_H_ */
755