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