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