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86b89cb0 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2908d778 JB |
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> | |
2908d778 JB |
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> | |
fa1c1e8f | 16 | #include <linux/libata.h> |
2908d778 | 17 | #include <linux/list.h> |
2908d778 JB |
18 | #include <scsi/scsi_device.h> |
19 | #include <scsi/scsi_cmnd.h> | |
20 | #include <scsi/scsi_transport_sas.h> | |
87ae9afd | 21 | #include <linux/scatterlist.h> |
5a0e3ad6 | 22 | #include <linux/slab.h> |
2908d778 JB |
23 | |
24 | struct block_device; | |
25 | ||
26 | enum sas_class { | |
27 | SAS, | |
28 | EXPANDER | |
29 | }; | |
30 | ||
31 | enum sas_phy_role { | |
32 | PHY_ROLE_NONE = 0, | |
33 | PHY_ROLE_TARGET = 0x40, | |
34 | PHY_ROLE_INITIATOR = 0x80, | |
35 | }; | |
36 | ||
37 | enum sas_phy_type { | |
ff525b6e JG |
38 | PHY_TYPE_PHYSICAL, |
39 | PHY_TYPE_VIRTUAL | |
2908d778 JB |
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 | */ | |
2908d778 JB |
46 | enum port_event { |
47 | PORTE_BYTES_DMAED = 0U, | |
0d78f969 JY |
48 | PORTE_BROADCAST_RCVD, |
49 | PORTE_LINK_RESET_ERR, | |
50 | PORTE_TIMER_EVENT, | |
51 | PORTE_HARD_RESET, | |
52 | PORT_NUM_EVENTS, | |
2908d778 JB |
53 | }; |
54 | ||
55 | enum phy_event { | |
56 | PHYE_LOSS_OF_SIGNAL = 0U, | |
0d78f969 JY |
57 | PHYE_OOB_DONE, |
58 | PHYE_OOB_ERROR, | |
59 | PHYE_SPINUP_HOLD, /* hot plug SATA, no COMWAKE sent */ | |
60 | PHYE_RESUME_TIMEOUT, | |
f12486e0 | 61 | PHYE_SHUTDOWN, |
0d78f969 | 62 | PHY_NUM_EVENTS, |
2908d778 JB |
63 | }; |
64 | ||
65 | enum discover_event { | |
66 | DISCE_DISCOVER_DOMAIN = 0U, | |
0d78f969 | 67 | DISCE_REVALIDATE_DOMAIN, |
0d78f969 JY |
68 | DISCE_SUSPEND, |
69 | DISCE_RESUME, | |
0d78f969 | 70 | DISC_NUM_EVENTS, |
2908d778 JB |
71 | }; |
72 | ||
73 | /* ---------- Expander Devices ---------- */ | |
74 | ||
2908d778 JB |
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,\ | |
ff525b6e | 77 | attr) |
2908d778 JB |
78 | |
79 | enum routing_attribute { | |
80 | DIRECT_ROUTING, | |
81 | SUBTRACTIVE_ROUTING, | |
82 | TABLE_ROUTING, | |
83 | }; | |
84 | ||
85 | enum ex_phy_state { | |
86 | PHY_EMPTY, | |
87 | PHY_VACANT, | |
88 | PHY_NOT_PRESENT, | |
89 | PHY_DEVICE_DISCOVERED | |
90 | }; | |
91 | ||
92 | struct ex_phy { | |
93 | int phy_id; | |
94 | ||
95 | enum ex_phy_state phy_state; | |
96 | ||
aa9f8328 | 97 | enum sas_device_type attached_dev_type; |
88edf746 | 98 | enum sas_linkrate linkrate; |
2908d778 JB |
99 | |
100 | u8 attached_sata_host:1; | |
101 | u8 attached_sata_dev:1; | |
102 | u8 attached_sata_ps:1; | |
103 | ||
5929faf3 DW |
104 | enum sas_protocol attached_tproto; |
105 | enum sas_protocol attached_iproto; | |
2908d778 JB |
106 | |
107 | u8 attached_sas_addr[SAS_ADDR_SIZE]; | |
108 | u8 attached_phy_id; | |
109 | ||
303694ee | 110 | int phy_change_count; |
2908d778 JB |
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 | ||
120 | struct expander_device { | |
121 | struct list_head children; | |
122 | ||
303694ee | 123 | int ex_change_count; |
2908d778 JB |
124 | u16 max_route_indexes; |
125 | u8 num_phys; | |
ffaac8f4 LT |
126 | |
127 | u8 t2t_supp:1; | |
2908d778 JB |
128 | u8 configuring:1; |
129 | u8 conf_route_table:1; | |
ffaac8f4 | 130 | |
2908d778 JB |
131 | u8 enclosure_logical_id[8]; |
132 | ||
133 | struct ex_phy *ex_phy; | |
134 | struct sas_port *parent_port; | |
89d3cf6a JS |
135 | |
136 | struct mutex cmd_mutex; | |
2908d778 JB |
137 | }; |
138 | ||
139 | /* ---------- SATA device ---------- */ | |
6ef1b512 DW |
140 | #define ATA_RESP_FIS_SIZE 24 |
141 | ||
2908d778 | 142 | struct sata_device { |
1cbd772d | 143 | unsigned int class; |
1cbd772d | 144 | u8 port_no; /* port number, if this is a PM (Port) */ |
fa1c1e8f DW |
145 | |
146 | struct ata_port *ap; | |
2fa4a326 | 147 | struct ata_host *ata_host; |
c2e8fbf9 | 148 | struct smp_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */ |
6ef1b512 | 149 | u8 fis[ATA_RESP_FIS_SIZE]; |
2908d778 JB |
150 | }; |
151 | ||
5db45bdc DW |
152 | struct ssp_device { |
153 | struct list_head eh_list_node; /* pending a user requested eh action */ | |
154 | struct scsi_lun reset_lun; | |
155 | }; | |
156 | ||
e139942d DW |
157 | enum { |
158 | SAS_DEV_GONE, | |
303694ee | 159 | SAS_DEV_FOUND, /* device notified to lldd */ |
87c8331f | 160 | SAS_DEV_DESTROY, |
e4a9c373 | 161 | SAS_DEV_EH_PENDING, |
5db45bdc DW |
162 | SAS_DEV_LU_RESET, |
163 | SAS_DEV_RESET, | |
e139942d DW |
164 | }; |
165 | ||
2908d778 | 166 | struct domain_device { |
9095a64a | 167 | spinlock_t done_lock; |
aa9f8328 | 168 | enum sas_device_type dev_type; |
2908d778 | 169 | |
ff525b6e JG |
170 | enum sas_linkrate linkrate; |
171 | enum sas_linkrate min_linkrate; | |
172 | enum sas_linkrate max_linkrate; | |
2908d778 | 173 | |
ff525b6e | 174 | int pathways; |
2908d778 | 175 | |
ff525b6e JG |
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 */ | |
f41a0c44 | 179 | struct sas_phy *phy; |
2908d778 | 180 | |
ff525b6e | 181 | struct list_head dev_list_node; |
87c8331f | 182 | struct list_head disco_list_node; /* awaiting probe or destruct */ |
2908d778 | 183 | |
ff525b6e JG |
184 | enum sas_protocol iproto; |
185 | enum sas_protocol tproto; | |
2908d778 | 186 | |
ff525b6e | 187 | struct sas_rphy *rphy; |
2908d778 | 188 | |
ff525b6e JG |
189 | u8 sas_addr[SAS_ADDR_SIZE]; |
190 | u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE]; | |
2908d778 | 191 | |
ff525b6e | 192 | u8 frame_rcvd[32]; |
2908d778 | 193 | |
ff525b6e JG |
194 | union { |
195 | struct expander_device ex_dev; | |
196 | struct sata_device sata_dev; /* STP & directly attached */ | |
5db45bdc | 197 | struct ssp_device ssp_dev; |
ff525b6e | 198 | }; |
2908d778 | 199 | |
ff525b6e | 200 | void *lldd_dev; |
e139942d | 201 | unsigned long state; |
735f7d2f | 202 | struct kref kref; |
2908d778 JB |
203 | }; |
204 | ||
22b9153f DW |
205 | struct sas_work { |
206 | struct list_head drain_node; | |
c4028958 | 207 | struct work_struct work; |
22b9153f DW |
208 | }; |
209 | ||
085f104a JG |
210 | /* Lots of code duplicates this in the SCSI tree, which can be factored out */ |
211 | static 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 | ||
22b9153f DW |
217 | static 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 | ||
223 | struct sas_discovery_event { | |
224 | struct sas_work work; | |
c4028958 DH |
225 | struct asd_sas_port *port; |
226 | }; | |
227 | ||
22b9153f DW |
228 | static 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 | ||
2908d778 | 235 | struct sas_discovery { |
c4028958 | 236 | struct sas_discovery_event disc_work[DISC_NUM_EVENTS]; |
2908d778 | 237 | unsigned long pending; |
7b27c5fe JG |
238 | u8 fanout_sas_addr[SAS_ADDR_SIZE]; |
239 | u8 eeds_a[SAS_ADDR_SIZE]; | |
240 | u8 eeds_b[SAS_ADDR_SIZE]; | |
2908d778 JB |
241 | int max_level; |
242 | }; | |
243 | ||
2908d778 JB |
244 | /* The port struct is Class:RW, driver:RO */ |
245 | struct asd_sas_port { | |
246 | /* private: */ | |
2908d778 JB |
247 | struct sas_discovery disc; |
248 | struct domain_device *port_dev; | |
249 | spinlock_t dev_list_lock; | |
250 | struct list_head dev_list; | |
87c8331f DW |
251 | struct list_head disco_list; |
252 | struct list_head destroy_list; | |
0558f33c | 253 | struct list_head sas_port_del_list; |
88edf746 | 254 | enum sas_linkrate linkrate; |
2908d778 | 255 | |
22b9153f | 256 | struct sas_work work; |
303694ee | 257 | int suspended; |
2908d778 JB |
258 | |
259 | /* public: */ | |
260 | int id; | |
261 | ||
262 | enum sas_class class; | |
263 | u8 sas_addr[SAS_ADDR_SIZE]; | |
264 | u8 attached_sas_addr[SAS_ADDR_SIZE]; | |
5929faf3 DW |
265 | enum sas_protocol iproto; |
266 | enum sas_protocol tproto; | |
2908d778 JB |
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; /* not touched by the sas class code */ | |
280 | }; | |
281 | ||
c4028958 | 282 | struct asd_sas_event { |
22b9153f | 283 | struct sas_work work; |
c4028958 | 284 | struct asd_sas_phy *phy; |
1c393b97 | 285 | int event; |
c4028958 DH |
286 | }; |
287 | ||
22b9153f DW |
288 | static 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 | ||
1c393b97 JY |
295 | static 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 | ||
f12486e0 | 304 | #define SAS_PHY_SHUTDOWN_THRES 1024 |
1c393b97 | 305 | |
2908d778 JB |
306 | /* The phy pretty much is controlled by the LLDD. |
307 | * The class only reads those fields. | |
308 | */ | |
309 | struct asd_sas_phy { | |
310 | /* private: */ | |
f12486e0 JY |
311 | atomic_t event_nr; |
312 | int in_shutdown; | |
2908d778 | 313 | int error; |
303694ee | 314 | int suspended; |
2908d778 JB |
315 | |
316 | struct sas_phy *phy; | |
317 | ||
318 | /* public: */ | |
319 | /* The following are class:RO, driver:R/W */ | |
320 | int enabled; /* must be set */ | |
321 | ||
322 | int id; /* must be set */ | |
323 | enum sas_class class; | |
5929faf3 DW |
324 | enum sas_protocol iproto; |
325 | enum sas_protocol tproto; | |
2908d778 JB |
326 | |
327 | enum sas_phy_type type; | |
328 | enum sas_phy_role role; | |
329 | enum sas_oob_mode oob_mode; | |
88edf746 | 330 | enum sas_linkrate linkrate; |
2908d778 JB |
331 | |
332 | u8 *sas_addr; /* must be set */ | |
333 | u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */ | |
334 | ||
335 | spinlock_t frame_rcvd_lock; | |
336 | u8 *frame_rcvd; /* must be set */ | |
337 | int frame_rcvd_size; | |
338 | ||
339 | spinlock_t sas_prim_lock; | |
340 | u32 sas_prim; | |
341 | ||
342 | struct list_head port_phy_el; /* driver:RO */ | |
343 | struct asd_sas_port *port; /* Class:RW, driver: RO */ | |
344 | ||
345 | struct sas_ha_struct *ha; /* may be set; the class sets it anyway */ | |
346 | ||
347 | void *lldd_phy; /* not touched by the sas_class_code */ | |
348 | }; | |
349 | ||
350 | struct scsi_core { | |
351 | struct Scsi_Host *shost; | |
352 | ||
2908d778 JB |
353 | }; |
354 | ||
6b0efb85 DW |
355 | enum sas_ha_state { |
356 | SAS_HA_REGISTERED, | |
b1124cd3 | 357 | SAS_HA_DRAINING, |
87c8331f | 358 | SAS_HA_ATA_EH_ACTIVE, |
9095a64a | 359 | SAS_HA_FROZEN, |
6b0efb85 DW |
360 | }; |
361 | ||
2908d778 JB |
362 | struct sas_ha_struct { |
363 | /* private: */ | |
b1124cd3 DW |
364 | struct list_head defer_q; /* work queued while draining */ |
365 | struct mutex drain_mutex; | |
f8daa6e6 | 366 | unsigned long state; |
e4a9c373 DW |
367 | spinlock_t lock; |
368 | int eh_active; | |
5db45bdc DW |
369 | wait_queue_head_t eh_wait_q; |
370 | struct list_head eh_dev_q; | |
6b0efb85 | 371 | |
87c8331f DW |
372 | struct mutex disco_mutex; |
373 | ||
2908d778 JB |
374 | struct scsi_core core; |
375 | ||
376 | /* public: */ | |
377 | char *sas_ha_name; | |
1d1bbee6 | 378 | struct device *dev; /* should be set */ |
2908d778 JB |
379 | struct module *lldd_module; /* should be set */ |
380 | ||
93bdbd06 JY |
381 | struct workqueue_struct *event_q; |
382 | struct workqueue_struct *disco_q; | |
383 | ||
2908d778 JB |
384 | u8 *sas_addr; /* must be set */ |
385 | u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE]; | |
386 | ||
387 | spinlock_t phy_port_lock; | |
388 | struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */ | |
389 | struct asd_sas_port **sas_port; /* array of valid pointers, must be set */ | |
390 | int num_phys; /* must be set, gt 0, static */ | |
391 | ||
00f0254e DW |
392 | int strict_wide_ports; /* both sas_addr and attached_sas_addr must match |
393 | * their siblings when forming wide ports */ | |
2908d778 JB |
394 | |
395 | /* LLDD calls these to notify the class of an event. */ | |
6d311fa7 JT |
396 | int (*notify_port_event)(struct asd_sas_phy *, enum port_event); |
397 | int (*notify_phy_event)(struct asd_sas_phy *, enum phy_event); | |
2908d778 JB |
398 | |
399 | void *lldd_ha; /* not touched by sas class code */ | |
f456393e | 400 | |
3944f509 DW |
401 | struct list_head eh_done_q; /* complete via scsi_eh_flush_done_q */ |
402 | struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */ | |
f12486e0 JY |
403 | |
404 | int event_thres; | |
2908d778 JB |
405 | }; |
406 | ||
407 | #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata) | |
408 | ||
409 | static inline struct domain_device * | |
410 | starget_to_domain_dev(struct scsi_target *starget) { | |
411 | return starget->hostdata; | |
412 | } | |
413 | ||
414 | static inline struct domain_device * | |
415 | sdev_to_domain_dev(struct scsi_device *sdev) { | |
416 | return starget_to_domain_dev(sdev->sdev_target); | |
417 | } | |
418 | ||
b50102d3 DW |
419 | static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev) |
420 | { | |
421 | return &dev->sata_dev.ap->link.device[0]; | |
422 | } | |
423 | ||
2908d778 JB |
424 | static inline struct domain_device * |
425 | cmd_to_domain_dev(struct scsi_cmnd *cmd) | |
426 | { | |
427 | return sdev_to_domain_dev(cmd->device); | |
428 | } | |
429 | ||
430 | void sas_hash_addr(u8 *hashed, const u8 *sas_addr); | |
431 | ||
432 | /* Before calling a notify event, LLDD should use this function | |
433 | * when the link is severed (possibly from its tasklet). | |
434 | * The idea is that the Class only reads those, while the LLDD, | |
435 | * can R/W these (thus avoiding a race). | |
436 | */ | |
437 | static inline void sas_phy_disconnected(struct asd_sas_phy *phy) | |
438 | { | |
439 | phy->oob_mode = OOB_NOT_CONNECTED; | |
88edf746 | 440 | phy->linkrate = SAS_LINK_RATE_UNKNOWN; |
2908d778 JB |
441 | } |
442 | ||
8ec6552f DW |
443 | static inline unsigned int to_sas_gpio_od(int device, int bit) |
444 | { | |
445 | return 3 * device + bit; | |
446 | } | |
447 | ||
f41a0c44 DW |
448 | static inline void sas_put_local_phy(struct sas_phy *phy) |
449 | { | |
450 | put_device(&phy->dev); | |
451 | } | |
452 | ||
d962480e | 453 | #ifdef CONFIG_SCSI_SAS_HOST_SMP |
8ec6552f | 454 | int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count); |
d962480e DW |
455 | #else |
456 | static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count) | |
457 | { | |
458 | return -1; | |
459 | } | |
460 | #endif | |
8ec6552f | 461 | |
2908d778 JB |
462 | /* ---------- Tasks ---------- */ |
463 | /* | |
464 | service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED | | |
465 | exec_status | | | | |
466 | ---------------------+---------------------+-----------------------+ | |
467 | SAM_... | X | | | |
468 | DEV_NO_RESPONSE | X | X | | |
469 | INTERRUPTED | X | | | |
470 | QUEUE_FULL | | X | | |
471 | DEVICE_UNKNOWN | | X | | |
472 | SG_ERR | | X | | |
473 | ---------------------+---------------------+-----------------------+ | |
474 | */ | |
475 | ||
476 | enum service_response { | |
477 | SAS_TASK_COMPLETE, | |
478 | SAS_TASK_UNDELIVERED = -1, | |
479 | }; | |
480 | ||
481 | enum exec_status { | |
a3a14252 DW |
482 | /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of |
483 | * them here to silence 'case value not in enumerated type' warnings | |
484 | */ | |
485 | __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION, | |
2908d778 JB |
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 | }; | |
502 | ||
503 | /* When a task finishes with a response, the LLDD examines the | |
504 | * response: | |
ff525b6e | 505 | * - For an ATA task task_status_struct::stat is set to |
2908d778 JB |
506 | * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the |
507 | * contents of struct ata_task_resp. | |
ff525b6e | 508 | * - For SSP tasks, if no data is present or status/TMF response |
2908d778 JB |
509 | * is valid, task_status_struct::stat is set. If data is present |
510 | * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets | |
511 | * task_status_struct::buf_valid_size, and task_status_struct::stat is | |
512 | * set to SAM_CHECK_COND. | |
513 | * | |
514 | * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp | |
515 | * for ATA task. | |
516 | * | |
517 | * "frame_len" is the total frame length, which could be more or less | |
518 | * than actually copied. | |
519 | * | |
520 | * Tasks ending with response, always set the residual field. | |
521 | */ | |
522 | struct ata_task_resp { | |
523 | u16 frame_len; | |
6ef1b512 | 524 | u8 ending_fis[ATA_RESP_FIS_SIZE]; /* dev to host or data-in */ |
2908d778 JB |
525 | }; |
526 | ||
527 | #define SAS_STATUS_BUF_SIZE 96 | |
528 | ||
529 | struct 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 | /* ATA and ATAPI task queuable to a SAS LLDD. | |
541 | */ | |
542 | struct sas_ata_task { | |
543 | struct host_to_dev_fis fis; | |
544 | u8 atapi_packet[16]; /* 0 if not ATAPI task */ | |
545 | ||
546 | u8 retry_count; /* hardware retry, should be > 0 */ | |
547 | ||
548 | u8 dma_xfer:1; /* PIO:0 or DMA: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 | ||
556 | struct sas_smp_task { | |
557 | struct scatterlist smp_req; | |
558 | struct scatterlist smp_resp; | |
559 | }; | |
560 | ||
561 | enum task_attribute { | |
562 | TASK_ATTR_SIMPLE = 0, | |
563 | TASK_ATTR_HOQ = 1, | |
564 | TASK_ATTR_ORDERED= 2, | |
565 | TASK_ATTR_ACA = 4, | |
566 | }; | |
567 | ||
568 | struct sas_ssp_task { | |
569 | u8 retry_count; /* hardware retry, should be > 0 */ | |
570 | ||
571 | u8 LUN[8]; | |
572 | u8 enable_first_burst:1; | |
573 | enum task_attribute task_attr; | |
574 | u8 task_prio; | |
e73823f7 | 575 | struct scsi_cmnd *cmd; |
2908d778 JB |
576 | }; |
577 | ||
578 | struct sas_task { | |
579 | struct domain_device *dev; | |
2908d778 JB |
580 | |
581 | spinlock_t task_state_lock; | |
582 | unsigned task_state_flags; | |
583 | ||
5929faf3 | 584 | enum sas_protocol task_proto; |
2908d778 | 585 | |
2908d778 JB |
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; /* Use PCI_DMA_... */ | |
596 | ||
597 | struct task_status_struct task_status; | |
598 | void (*task_done)(struct sas_task *); | |
599 | ||
600 | void *lldd_task; /* for use by LLDDs */ | |
601 | void *uldd_task; | |
f0bf750c DW |
602 | struct sas_task_slow *slow_task; |
603 | }; | |
79a5eb60 | 604 | |
f0bf750c DW |
605 | struct sas_task_slow { |
606 | /* standard/extra infrastructure for slow path commands (SMP and | |
607 | * internal lldd commands | |
608 | */ | |
609 | struct timer_list timer; | |
610 | struct completion completion; | |
77570eed | 611 | struct sas_task *task; |
2908d778 JB |
612 | }; |
613 | ||
f456393e DW |
614 | #define SAS_TASK_STATE_PENDING 1 |
615 | #define SAS_TASK_STATE_DONE 2 | |
616 | #define SAS_TASK_STATE_ABORTED 4 | |
3ebf6922 | 617 | #define SAS_TASK_NEED_DEV_RESET 8 |
b218a0d8 | 618 | #define SAS_TASK_AT_INITIATOR 16 |
2908d778 | 619 | |
4fcf812c | 620 | extern struct sas_task *sas_alloc_task(gfp_t flags); |
f0bf750c | 621 | extern struct sas_task *sas_alloc_slow_task(gfp_t flags); |
4fcf812c | 622 | extern void sas_free_task(struct sas_task *task); |
2908d778 JB |
623 | |
624 | struct sas_domain_function_template { | |
625 | /* The class calls these to notify the LLDD of an event. */ | |
626 | void (*lldd_port_formed)(struct asd_sas_phy *); | |
627 | void (*lldd_port_deformed)(struct asd_sas_phy *); | |
628 | ||
629 | /* The class calls these when a device is found or gone. */ | |
630 | int (*lldd_dev_found)(struct domain_device *); | |
631 | void (*lldd_dev_gone)(struct domain_device *); | |
632 | ||
79855d17 | 633 | int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags); |
2908d778 JB |
634 | |
635 | /* Task Management Functions. Must be called from process context. */ | |
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 *); | |
36a39947 | 641 | int (*lldd_ata_check_ready)(struct domain_device *); |
b91bb296 | 642 | void (*lldd_ata_set_dmamode)(struct domain_device *); |
2908d778 JB |
643 | int (*lldd_lu_reset)(struct domain_device *, u8 *lun); |
644 | int (*lldd_query_task)(struct sas_task *); | |
645 | ||
646 | /* Port and Adapter management */ | |
647 | int (*lldd_clear_nexus_port)(struct asd_sas_port *); | |
648 | int (*lldd_clear_nexus_ha)(struct sas_ha_struct *); | |
649 | ||
650 | /* Phy management */ | |
a01e70e5 | 651 | int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *); |
8ec6552f DW |
652 | |
653 | /* GPIO support */ | |
654 | int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type, | |
655 | u8 reg_index, u8 reg_count, u8 *write_data); | |
2908d778 JB |
656 | }; |
657 | ||
658 | extern int sas_register_ha(struct sas_ha_struct *); | |
659 | extern int sas_unregister_ha(struct sas_ha_struct *); | |
303694ee DW |
660 | extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha); |
661 | extern void sas_resume_ha(struct sas_ha_struct *sas_ha); | |
662 | extern void sas_suspend_ha(struct sas_ha_struct *sas_ha); | |
2908d778 | 663 | |
ff525b6e | 664 | int sas_set_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates); |
dea22214 | 665 | int sas_phy_reset(struct sas_phy *phy, int hard_reset); |
ff525b6e | 666 | extern int sas_queuecommand(struct Scsi_Host *, struct scsi_cmnd *); |
2908d778 | 667 | extern int sas_target_alloc(struct scsi_target *); |
2908d778 | 668 | extern int sas_slave_configure(struct scsi_device *); |
db5ed4df | 669 | extern int sas_change_queue_depth(struct scsi_device *, int new_depth); |
ff525b6e | 670 | extern int sas_bios_param(struct scsi_device *, struct block_device *, |
2908d778 JB |
671 | sector_t capacity, int *hsc); |
672 | extern struct scsi_transport_template * | |
673 | sas_domain_attach_transport(struct sas_domain_function_template *); | |
8eea9dd8 | 674 | extern struct device_attribute dev_attr_phy_event_threshold; |
2908d778 JB |
675 | |
676 | int sas_discover_root_expander(struct domain_device *); | |
677 | ||
678 | void sas_init_ex_attr(void); | |
679 | ||
680 | int sas_ex_revalidate_domain(struct domain_device *); | |
681 | ||
7d05919a | 682 | void sas_unregister_domain_devices(struct asd_sas_port *port, int gone); |
2908d778 JB |
683 | void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *); |
684 | int sas_discover_event(struct asd_sas_port *, enum discover_event ev); | |
685 | ||
686 | int sas_discover_sata(struct domain_device *); | |
687 | int sas_discover_end_dev(struct domain_device *); | |
688 | ||
1a34c064 | 689 | void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *); |
2908d778 JB |
690 | |
691 | void sas_init_dev(struct domain_device *); | |
692 | ||
396819fb | 693 | void sas_task_abort(struct sas_task *); |
9524c682 | 694 | int sas_eh_abort_handler(struct scsi_cmnd *cmd); |
ad689233 | 695 | int sas_eh_device_reset_handler(struct scsi_cmnd *cmd); |
cc199e78 | 696 | int sas_eh_target_reset_handler(struct scsi_cmnd *cmd); |
79a5eb60 | 697 | |
fa1c1e8f DW |
698 | extern void sas_target_destroy(struct scsi_target *); |
699 | extern int sas_slave_alloc(struct scsi_device *); | |
6f4e626f NC |
700 | extern int sas_ioctl(struct scsi_device *sdev, unsigned int cmd, |
701 | void __user *arg); | |
b1124cd3 | 702 | extern int sas_drain_work(struct sas_ha_struct *ha); |
fa1c1e8f | 703 | |
366ca51f JB |
704 | extern void sas_ssp_task_response(struct device *dev, struct sas_task *task, |
705 | struct ssp_response_iu *iu); | |
f41a0c44 | 706 | struct sas_phy *sas_get_local_phy(struct domain_device *dev); |
366ca51f | 707 | |
45e6cdf4 DW |
708 | int sas_request_addr(struct Scsi_Host *shost, u8 *addr); |
709 | ||
2908d778 | 710 | #endif /* _SASLIB_H_ */ |