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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
43
44
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,
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
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
140#define ATA_RESP_FIS_SIZE 24
141
142struct sata_device {
143 unsigned int class;
144 u8 port_no;
145
146 struct ata_port *ap;
147 struct ata_host *ata_host;
148 struct smp_resp rps_resp ____cacheline_aligned;
149 u8 fis[ATA_RESP_FIS_SIZE];
150};
151
152struct ssp_device {
153 struct list_head eh_list_node;
154 struct scsi_lun reset_lun;
155};
156
157enum {
158 SAS_DEV_GONE,
159 SAS_DEV_FOUND,
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;
178 struct asd_sas_port *port;
179 struct sas_phy *phy;
180
181 struct list_head dev_list_node;
182 struct list_head disco_list_node;
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;
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
210
211static inline bool sas_dev_type_is_expander(enum sas_device_type type)
212{
213 return type == SAS_EDGE_EXPANDER_DEVICE ||
214 type == SAS_FANOUT_EXPANDER_DEVICE;
215}
216
217static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
218{
219 INIT_WORK(&sw->work, fn);
220 INIT_LIST_HEAD(&sw->drain_node);
221}
222
223struct sas_discovery_event {
224 struct sas_work work;
225 struct asd_sas_port *port;
226};
227
228static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
229{
230 struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
231
232 return ev;
233}
234
235struct sas_discovery {
236 struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
237 unsigned long pending;
238 u8 fanout_sas_addr[SAS_ADDR_SIZE];
239 u8 eeds_a[SAS_ADDR_SIZE];
240 u8 eeds_b[SAS_ADDR_SIZE];
241 int max_level;
242};
243
244
245struct asd_sas_port {
246
247 struct sas_discovery disc;
248 struct domain_device *port_dev;
249 spinlock_t dev_list_lock;
250 struct list_head dev_list;
251 struct list_head disco_list;
252 struct list_head destroy_list;
253 struct list_head sas_port_del_list;
254 enum sas_linkrate linkrate;
255
256 struct sas_work work;
257 int suspended;
258
259
260 int id;
261
262 enum sas_class class;
263 u8 sas_addr[SAS_ADDR_SIZE];
264 u8 attached_sas_addr[SAS_ADDR_SIZE];
265 enum sas_protocol iproto;
266 enum sas_protocol tproto;
267
268 enum sas_oob_mode oob_mode;
269
270 spinlock_t phy_list_lock;
271 struct list_head phy_list;
272 int num_phys;
273 u32 phy_mask;
274
275 struct sas_ha_struct *ha;
276
277 struct sas_port *port;
278
279 void *lldd_port;
280};
281
282struct asd_sas_event {
283 struct sas_work work;
284 struct asd_sas_phy *phy;
285 int event;
286};
287
288static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
289{
290 struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
291
292 return ev;
293}
294
295static inline void INIT_SAS_EVENT(struct asd_sas_event *ev,
296 void (*fn)(struct work_struct *),
297 struct asd_sas_phy *phy, int event)
298{
299 INIT_SAS_WORK(&ev->work, fn);
300 ev->phy = phy;
301 ev->event = event;
302}
303
304#define SAS_PHY_SHUTDOWN_THRES 1024
305
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307
308
309struct asd_sas_phy {
310
311 atomic_t event_nr;
312 int in_shutdown;
313 int error;
314 int suspended;
315
316 struct sas_phy *phy;
317
318
319
320 int enabled;
321
322 int id;
323 enum sas_class class;
324 enum sas_protocol iproto;
325 enum sas_protocol tproto;
326
327 enum sas_phy_type type;
328 enum sas_phy_role role;
329 enum sas_oob_mode oob_mode;
330 enum sas_linkrate linkrate;
331
332 u8 *sas_addr;
333 u8 attached_sas_addr[SAS_ADDR_SIZE];
334
335 spinlock_t frame_rcvd_lock;
336 u8 *frame_rcvd;
337 int frame_rcvd_size;
338
339 spinlock_t sas_prim_lock;
340 u32 sas_prim;
341
342 struct list_head port_phy_el;
343 struct asd_sas_port *port;
344
345 struct sas_ha_struct *ha;
346
347 void *lldd_phy;
348};
349
350struct scsi_core {
351 struct Scsi_Host *shost;
352
353};
354
355enum sas_ha_state {
356 SAS_HA_REGISTERED,
357 SAS_HA_DRAINING,
358 SAS_HA_ATA_EH_ACTIVE,
359 SAS_HA_FROZEN,
360};
361
362struct sas_ha_struct {
363
364 struct list_head defer_q;
365 struct mutex drain_mutex;
366 unsigned long state;
367 spinlock_t lock;
368 int eh_active;
369 wait_queue_head_t eh_wait_q;
370 struct list_head eh_dev_q;
371
372 struct mutex disco_mutex;
373
374 struct scsi_core core;
375
376
377 char *sas_ha_name;
378 struct device *dev;
379 struct module *lldd_module;
380
381 struct workqueue_struct *event_q;
382 struct workqueue_struct *disco_q;
383
384 u8 *sas_addr;
385 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
386
387 spinlock_t phy_port_lock;
388 struct asd_sas_phy **sas_phy;
389 struct asd_sas_port **sas_port;
390 int num_phys;
391
392 int strict_wide_ports;
393
394
395
396 int (*notify_port_event)(struct asd_sas_phy *, enum port_event);
397 int (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
398
399 void *lldd_ha;
400
401 struct list_head eh_done_q;
402 struct list_head eh_ata_q;
403
404 int event_thres;
405};
406
407#define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
408
409static inline struct domain_device *
410starget_to_domain_dev(struct scsi_target *starget) {
411 return starget->hostdata;
412}
413
414static inline struct domain_device *
415sdev_to_domain_dev(struct scsi_device *sdev) {
416 return starget_to_domain_dev(sdev->sdev_target);
417}
418
419static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
420{
421 return &dev->sata_dev.ap->link.device[0];
422}
423
424static inline struct domain_device *
425cmd_to_domain_dev(struct scsi_cmnd *cmd)
426{
427 return sdev_to_domain_dev(cmd->device);
428}
429
430void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
431
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436
437static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
438{
439 phy->oob_mode = OOB_NOT_CONNECTED;
440 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
441}
442
443static inline unsigned int to_sas_gpio_od(int device, int bit)
444{
445 return 3 * device + bit;
446}
447
448static inline void sas_put_local_phy(struct sas_phy *phy)
449{
450 put_device(&phy->dev);
451}
452
453#ifdef CONFIG_SCSI_SAS_HOST_SMP
454int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
455#else
456static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
457{
458 return -1;
459}
460#endif
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474
475
476enum service_response {
477 SAS_TASK_COMPLETE,
478 SAS_TASK_UNDELIVERED = -1,
479};
480
481enum exec_status {
482
483
484
485 __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
486
487 SAS_DEV_NO_RESPONSE = 0x80,
488 SAS_DATA_UNDERRUN,
489 SAS_DATA_OVERRUN,
490 SAS_INTERRUPTED,
491 SAS_QUEUE_FULL,
492 SAS_DEVICE_UNKNOWN,
493 SAS_SG_ERR,
494 SAS_OPEN_REJECT,
495 SAS_OPEN_TO,
496 SAS_PROTO_RESPONSE,
497 SAS_PHY_DOWN,
498 SAS_NAK_R_ERR,
499 SAS_PENDING,
500 SAS_ABORTED_TASK,
501};
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521
522struct ata_task_resp {
523 u16 frame_len;
524 u8 ending_fis[ATA_RESP_FIS_SIZE];
525};
526
527#define SAS_STATUS_BUF_SIZE 96
528
529struct task_status_struct {
530 enum service_response resp;
531 enum exec_status stat;
532 int buf_valid_size;
533
534 u8 buf[SAS_STATUS_BUF_SIZE];
535
536 u32 residual;
537 enum sas_open_rej_reason open_rej_reason;
538};
539
540
541
542struct sas_ata_task {
543 struct host_to_dev_fis fis;
544 u8 atapi_packet[16];
545
546 u8 retry_count;
547
548 u8 dma_xfer:1;
549 u8 use_ncq:1;
550 u8 set_affil_pol:1;
551 u8 stp_affil_pol:1;
552
553 u8 device_control_reg_update:1;
554};
555
556struct sas_smp_task {
557 struct scatterlist smp_req;
558 struct scatterlist smp_resp;
559};
560
561enum task_attribute {
562 TASK_ATTR_SIMPLE = 0,
563 TASK_ATTR_HOQ = 1,
564 TASK_ATTR_ORDERED= 2,
565 TASK_ATTR_ACA = 4,
566};
567
568struct sas_ssp_task {
569 u8 retry_count;
570
571 u8 LUN[8];
572 u8 enable_first_burst:1;
573 enum task_attribute task_attr;
574 u8 task_prio;
575 struct scsi_cmnd *cmd;
576};
577
578struct sas_task {
579 struct domain_device *dev;
580
581 spinlock_t task_state_lock;
582 unsigned task_state_flags;
583
584 enum sas_protocol task_proto;
585
586 union {
587 struct sas_ata_task ata_task;
588 struct sas_smp_task smp_task;
589 struct sas_ssp_task ssp_task;
590 };
591
592 struct scatterlist *scatter;
593 int num_scatter;
594 u32 total_xfer_len;
595 u8 data_dir:2;
596
597 struct task_status_struct task_status;
598 void (*task_done)(struct sas_task *);
599
600 void *lldd_task;
601 void *uldd_task;
602 struct sas_task_slow *slow_task;
603};
604
605struct sas_task_slow {
606
607
608
609 struct timer_list timer;
610 struct completion completion;
611 struct sas_task *task;
612};
613
614#define SAS_TASK_STATE_PENDING 1
615#define SAS_TASK_STATE_DONE 2
616#define SAS_TASK_STATE_ABORTED 4
617#define SAS_TASK_NEED_DEV_RESET 8
618#define SAS_TASK_AT_INITIATOR 16
619
620extern struct sas_task *sas_alloc_task(gfp_t flags);
621extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
622extern void sas_free_task(struct sas_task *task);
623
624struct sas_domain_function_template {
625
626 void (*lldd_port_formed)(struct asd_sas_phy *);
627 void (*lldd_port_deformed)(struct asd_sas_phy *);
628
629
630 int (*lldd_dev_found)(struct domain_device *);
631 void (*lldd_dev_gone)(struct domain_device *);
632
633 int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
634
635
636 int (*lldd_abort_task)(struct sas_task *);
637 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
638 int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
639 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
640 int (*lldd_I_T_nexus_reset)(struct domain_device *);
641 int (*lldd_ata_check_ready)(struct domain_device *);
642 void (*lldd_ata_set_dmamode)(struct domain_device *);
643 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
644 int (*lldd_query_task)(struct sas_task *);
645
646
647 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
648 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
649
650
651 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
652
653
654 int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
655 u8 reg_index, u8 reg_count, u8 *write_data);
656};
657
658extern int sas_register_ha(struct sas_ha_struct *);
659extern int sas_unregister_ha(struct sas_ha_struct *);
660extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
661extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
662extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
663
664int sas_set_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates);
665int sas_phy_reset(struct sas_phy *phy, int hard_reset);
666extern int sas_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
667extern int sas_target_alloc(struct scsi_target *);
668extern int sas_slave_configure(struct scsi_device *);
669extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
670extern int sas_bios_param(struct scsi_device *, struct block_device *,
671 sector_t capacity, int *hsc);
672extern struct scsi_transport_template *
673sas_domain_attach_transport(struct sas_domain_function_template *);
674extern struct device_attribute dev_attr_phy_event_threshold;
675
676int sas_discover_root_expander(struct domain_device *);
677
678void sas_init_ex_attr(void);
679
680int sas_ex_revalidate_domain(struct domain_device *);
681
682void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
683void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
684int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
685
686int sas_discover_sata(struct domain_device *);
687int sas_discover_end_dev(struct domain_device *);
688
689void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
690
691void sas_init_dev(struct domain_device *);
692
693void sas_task_abort(struct sas_task *);
694int sas_eh_abort_handler(struct scsi_cmnd *cmd);
695int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
696int sas_eh_target_reset_handler(struct scsi_cmnd *cmd);
697
698extern void sas_target_destroy(struct scsi_target *);
699extern int sas_slave_alloc(struct scsi_device *);
700extern int sas_ioctl(struct scsi_device *sdev, unsigned int cmd,
701 void __user *arg);
702extern int sas_drain_work(struct sas_ha_struct *ha);
703
704extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
705 struct ssp_response_iu *iu);
706struct sas_phy *sas_get_local_phy(struct domain_device *dev);
707
708int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
709
710#endif
711