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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/*
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_ */