2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27 * All rights reserved.
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
33 * * Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * * Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in
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39 * * Neither the name of Intel Corporation nor the names of its
40 * contributors may be used to endorse or promote products derived
41 * from this software without specific prior written permission.
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55 #include <scsi/sas_ata.h>
58 #include "remote_device.h"
59 #include "remote_node_context.h"
60 #include "scu_event_codes.h"
61 #include "scu_task_context.h"
65 const char *rnc_state_name(enum scis_sds_remote_node_context_states state
)
67 static const char * const strings
[] = RNC_STATES
;
69 return strings
[state
];
75 * @sci_rnc: The state of the remote node context object to check.
77 * This method will return true if the remote node context is in a READY state
78 * otherwise it will return false bool true if the remote node context is in
79 * the ready state. false if the remote node context is not in the ready state.
81 bool sci_remote_node_context_is_ready(
82 struct sci_remote_node_context
*sci_rnc
)
84 u32 current_state
= sci_rnc
->sm
.current_state_id
;
86 if (current_state
== SCI_RNC_READY
) {
93 bool sci_remote_node_context_is_suspended(struct sci_remote_node_context
*sci_rnc
)
95 u32 current_state
= sci_rnc
->sm
.current_state_id
;
97 if (current_state
== SCI_RNC_TX_RX_SUSPENDED
)
102 static union scu_remote_node_context
*sci_rnc_by_id(struct isci_host
*ihost
, u16 id
)
104 if (id
< ihost
->remote_node_entries
&&
105 ihost
->device_table
[id
])
106 return &ihost
->remote_node_context_table
[id
];
111 static void sci_remote_node_context_construct_buffer(struct sci_remote_node_context
*sci_rnc
)
113 struct isci_remote_device
*idev
= rnc_to_dev(sci_rnc
);
114 struct domain_device
*dev
= idev
->domain_dev
;
115 int rni
= sci_rnc
->remote_node_index
;
116 union scu_remote_node_context
*rnc
;
117 struct isci_host
*ihost
;
120 ihost
= idev
->owning_port
->owning_controller
;
121 rnc
= sci_rnc_by_id(ihost
, rni
);
123 memset(rnc
, 0, sizeof(union scu_remote_node_context
)
124 * sci_remote_device_node_count(idev
));
126 rnc
->ssp
.remote_node_index
= rni
;
127 rnc
->ssp
.remote_node_port_width
= idev
->device_port_width
;
128 rnc
->ssp
.logical_port_index
= idev
->owning_port
->physical_port_index
;
130 /* sas address is __be64, context ram format is __le64 */
131 sas_addr
= cpu_to_le64(SAS_ADDR(dev
->sas_addr
));
132 rnc
->ssp
.remote_sas_address_hi
= upper_32_bits(sas_addr
);
133 rnc
->ssp
.remote_sas_address_lo
= lower_32_bits(sas_addr
);
135 rnc
->ssp
.nexus_loss_timer_enable
= true;
136 rnc
->ssp
.check_bit
= false;
137 rnc
->ssp
.is_valid
= false;
138 rnc
->ssp
.is_remote_node_context
= true;
139 rnc
->ssp
.function_number
= 0;
141 rnc
->ssp
.arbitration_wait_time
= 0;
143 if (dev_is_sata(dev
)) {
144 rnc
->ssp
.connection_occupancy_timeout
=
145 ihost
->user_parameters
.stp_max_occupancy_timeout
;
146 rnc
->ssp
.connection_inactivity_timeout
=
147 ihost
->user_parameters
.stp_inactivity_timeout
;
149 rnc
->ssp
.connection_occupancy_timeout
=
150 ihost
->user_parameters
.ssp_max_occupancy_timeout
;
151 rnc
->ssp
.connection_inactivity_timeout
=
152 ihost
->user_parameters
.ssp_inactivity_timeout
;
155 rnc
->ssp
.initial_arbitration_wait_time
= 0;
157 /* Open Address Frame Parameters */
158 rnc
->ssp
.oaf_connection_rate
= idev
->connection_rate
;
159 rnc
->ssp
.oaf_features
= 0;
160 rnc
->ssp
.oaf_source_zone_group
= 0;
161 rnc
->ssp
.oaf_more_compatibility_features
= 0;
167 * @callback_parameter:
169 * This method will setup the remote node context object so it will transition
170 * to its ready state. If the remote node context is already setup to
171 * transition to its final state then this function does nothing. none
173 static void sci_remote_node_context_setup_to_resume(
174 struct sci_remote_node_context
*sci_rnc
,
175 scics_sds_remote_node_context_callback callback
,
176 void *callback_parameter
,
177 enum sci_remote_node_context_destination_state dest_param
)
179 if (sci_rnc
->destination_state
!= RNC_DEST_FINAL
) {
180 sci_rnc
->destination_state
= dest_param
;
181 if (callback
!= NULL
) {
182 sci_rnc
->user_callback
= callback
;
183 sci_rnc
->user_cookie
= callback_parameter
;
188 static void sci_remote_node_context_setup_to_destroy(
189 struct sci_remote_node_context
*sci_rnc
,
190 scics_sds_remote_node_context_callback callback
,
191 void *callback_parameter
)
193 struct isci_host
*ihost
= idev_to_ihost(rnc_to_dev(sci_rnc
));
195 sci_rnc
->destination_state
= RNC_DEST_FINAL
;
196 sci_rnc
->user_callback
= callback
;
197 sci_rnc
->user_cookie
= callback_parameter
;
199 wake_up(&ihost
->eventq
);
205 * This method just calls the user callback function and then resets the
208 static void sci_remote_node_context_notify_user(
209 struct sci_remote_node_context
*rnc
)
211 if (rnc
->user_callback
!= NULL
) {
212 (*rnc
->user_callback
)(rnc
->user_cookie
);
214 rnc
->user_callback
= NULL
;
215 rnc
->user_cookie
= NULL
;
219 static void sci_remote_node_context_continue_state_transitions(struct sci_remote_node_context
*rnc
)
221 switch (rnc
->destination_state
) {
223 case RNC_DEST_SUSPENDED_RESUME
:
224 rnc
->destination_state
= RNC_DEST_READY
;
225 /* Fall through... */
227 sci_remote_node_context_resume(rnc
, rnc
->user_callback
,
231 rnc
->destination_state
= RNC_DEST_UNSPECIFIED
;
236 static void sci_remote_node_context_validate_context_buffer(struct sci_remote_node_context
*sci_rnc
)
238 union scu_remote_node_context
*rnc_buffer
;
239 struct isci_remote_device
*idev
= rnc_to_dev(sci_rnc
);
240 struct domain_device
*dev
= idev
->domain_dev
;
241 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
243 rnc_buffer
= sci_rnc_by_id(ihost
, sci_rnc
->remote_node_index
);
245 rnc_buffer
->ssp
.is_valid
= true;
247 if (dev_is_sata(dev
) && dev
->parent
) {
248 sci_remote_device_post_request(idev
, SCU_CONTEXT_COMMAND_POST_RNC_96
);
250 sci_remote_device_post_request(idev
, SCU_CONTEXT_COMMAND_POST_RNC_32
);
253 sci_port_setup_transports(idev
->owning_port
,
254 sci_rnc
->remote_node_index
);
258 static void sci_remote_node_context_invalidate_context_buffer(struct sci_remote_node_context
*sci_rnc
)
260 union scu_remote_node_context
*rnc_buffer
;
261 struct isci_remote_device
*idev
= rnc_to_dev(sci_rnc
);
262 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
264 rnc_buffer
= sci_rnc_by_id(ihost
, sci_rnc
->remote_node_index
);
266 rnc_buffer
->ssp
.is_valid
= false;
268 sci_remote_device_post_request(rnc_to_dev(sci_rnc
),
269 SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE
);
272 static void sci_remote_node_context_initial_state_enter(struct sci_base_state_machine
*sm
)
274 struct sci_remote_node_context
*rnc
= container_of(sm
, typeof(*rnc
), sm
);
275 struct isci_remote_device
*idev
= rnc_to_dev(rnc
);
276 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
278 /* Check to see if we have gotten back to the initial state because
279 * someone requested to destroy the remote node context object.
281 if (sm
->previous_state_id
== SCI_RNC_INVALIDATING
) {
282 rnc
->destination_state
= RNC_DEST_UNSPECIFIED
;
283 sci_remote_node_context_notify_user(rnc
);
286 wake_up(&ihost
->eventq
);
290 static void sci_remote_node_context_posting_state_enter(struct sci_base_state_machine
*sm
)
292 struct sci_remote_node_context
*sci_rnc
= container_of(sm
, typeof(*sci_rnc
), sm
);
294 sci_remote_node_context_validate_context_buffer(sci_rnc
);
297 static void sci_remote_node_context_invalidating_state_enter(struct sci_base_state_machine
*sm
)
299 struct sci_remote_node_context
*rnc
= container_of(sm
, typeof(*rnc
), sm
);
301 /* Terminate all outstanding requests. */
302 sci_remote_device_terminate_requests(rnc_to_dev(rnc
));
303 sci_remote_node_context_invalidate_context_buffer(rnc
);
306 static void sci_remote_node_context_resuming_state_enter(struct sci_base_state_machine
*sm
)
308 struct sci_remote_node_context
*rnc
= container_of(sm
, typeof(*rnc
), sm
);
309 struct isci_remote_device
*idev
;
310 struct domain_device
*dev
;
312 idev
= rnc_to_dev(rnc
);
313 dev
= idev
->domain_dev
;
316 * For direct attached SATA devices we need to clear the TLCR
317 * NCQ to TCi tag mapping on the phy and in cases where we
318 * resume because of a target reset we also need to update
319 * the STPTLDARNI register with the RNi of the device
321 if (dev_is_sata(dev
) && !dev
->parent
)
322 sci_port_setup_transports(idev
->owning_port
, rnc
->remote_node_index
);
324 sci_remote_device_post_request(idev
, SCU_CONTEXT_COMMAND_POST_RNC_RESUME
);
327 static void sci_remote_node_context_ready_state_enter(struct sci_base_state_machine
*sm
)
329 struct sci_remote_node_context
*rnc
= container_of(sm
, typeof(*rnc
), sm
);
330 enum sci_remote_node_context_destination_state dest_select
;
333 dest_select
= rnc
->destination_state
;
334 rnc
->destination_state
= RNC_DEST_UNSPECIFIED
;
336 if ((dest_select
== RNC_DEST_SUSPENDED
) ||
337 (dest_select
== RNC_DEST_SUSPENDED_RESUME
)) {
338 sci_remote_node_context_suspend(
339 rnc
, rnc
->suspend_reason
,
340 SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT
);
342 if (dest_select
== RNC_DEST_SUSPENDED_RESUME
)
343 tell_user
= 0; /* Wait until ready again. */
346 sci_remote_node_context_notify_user(rnc
);
349 static void sci_remote_node_context_tx_suspended_state_enter(struct sci_base_state_machine
*sm
)
351 struct sci_remote_node_context
*rnc
= container_of(sm
, typeof(*rnc
), sm
);
353 sci_remote_node_context_continue_state_transitions(rnc
);
356 static void sci_remote_node_context_tx_rx_suspended_state_enter(struct sci_base_state_machine
*sm
)
358 struct sci_remote_node_context
*rnc
= container_of(sm
, typeof(*rnc
), sm
);
359 struct isci_remote_device
*idev
= rnc_to_dev(rnc
);
360 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
361 u32 new_count
= rnc
->suspend_count
+ 1;
364 rnc
->suspend_count
= 1;
366 rnc
->suspend_count
= new_count
;
369 /* Terminate outstanding requests pending abort. */
370 sci_remote_device_abort_requests_pending_abort(idev
);
372 wake_up(&ihost
->eventq
);
373 sci_remote_node_context_continue_state_transitions(rnc
);
376 static void sci_remote_node_context_await_suspend_state_exit(
377 struct sci_base_state_machine
*sm
)
379 struct sci_remote_node_context
*rnc
380 = container_of(sm
, typeof(*rnc
), sm
);
381 struct isci_remote_device
*idev
= rnc_to_dev(rnc
);
383 if (dev_is_sata(idev
->domain_dev
))
384 isci_dev_set_hang_detection_timeout(idev
, 0);
387 static const struct sci_base_state sci_remote_node_context_state_table
[] = {
388 [SCI_RNC_INITIAL
] = {
389 .enter_state
= sci_remote_node_context_initial_state_enter
,
391 [SCI_RNC_POSTING
] = {
392 .enter_state
= sci_remote_node_context_posting_state_enter
,
394 [SCI_RNC_INVALIDATING
] = {
395 .enter_state
= sci_remote_node_context_invalidating_state_enter
,
397 [SCI_RNC_RESUMING
] = {
398 .enter_state
= sci_remote_node_context_resuming_state_enter
,
401 .enter_state
= sci_remote_node_context_ready_state_enter
,
403 [SCI_RNC_TX_SUSPENDED
] = {
404 .enter_state
= sci_remote_node_context_tx_suspended_state_enter
,
406 [SCI_RNC_TX_RX_SUSPENDED
] = {
407 .enter_state
= sci_remote_node_context_tx_rx_suspended_state_enter
,
409 [SCI_RNC_AWAIT_SUSPENSION
] = {
410 .exit_state
= sci_remote_node_context_await_suspend_state_exit
,
414 void sci_remote_node_context_construct(struct sci_remote_node_context
*rnc
,
415 u16 remote_node_index
)
417 memset(rnc
, 0, sizeof(struct sci_remote_node_context
));
419 rnc
->remote_node_index
= remote_node_index
;
420 rnc
->destination_state
= RNC_DEST_UNSPECIFIED
;
422 sci_init_sm(&rnc
->sm
, sci_remote_node_context_state_table
, SCI_RNC_INITIAL
);
425 enum sci_status
sci_remote_node_context_event_handler(struct sci_remote_node_context
*sci_rnc
,
428 enum scis_sds_remote_node_context_states state
;
431 state
= sci_rnc
->sm
.current_state_id
;
433 case SCI_RNC_POSTING
:
434 switch (scu_get_event_code(event_code
)) {
435 case SCU_EVENT_POST_RNC_COMPLETE
:
436 sci_change_state(&sci_rnc
->sm
, SCI_RNC_READY
);
442 case SCI_RNC_INVALIDATING
:
443 if (scu_get_event_code(event_code
) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE
) {
444 if (sci_rnc
->destination_state
== RNC_DEST_FINAL
)
445 next_state
= SCI_RNC_INITIAL
;
447 next_state
= SCI_RNC_POSTING
;
448 sci_change_state(&sci_rnc
->sm
, next_state
);
450 switch (scu_get_event_type(event_code
)) {
451 case SCU_EVENT_TYPE_RNC_SUSPEND_TX
:
452 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX
:
453 /* We really dont care if the hardware is going to suspend
454 * the device since it's being invalidated anyway */
455 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
456 "%s: SCIC Remote Node Context 0x%p was "
457 "suspeneded by hardware while being "
458 "invalidated.\n", __func__
, sci_rnc
);
465 case SCI_RNC_RESUMING
:
466 if (scu_get_event_code(event_code
) == SCU_EVENT_POST_RCN_RELEASE
) {
467 sci_change_state(&sci_rnc
->sm
, SCI_RNC_READY
);
469 switch (scu_get_event_type(event_code
)) {
470 case SCU_EVENT_TYPE_RNC_SUSPEND_TX
:
471 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX
:
472 /* We really dont care if the hardware is going to suspend
473 * the device since it's being resumed anyway */
474 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
475 "%s: SCIC Remote Node Context 0x%p was "
476 "suspeneded by hardware while being resumed.\n",
485 switch (scu_get_event_type(event_code
)) {
486 case SCU_EVENT_TL_RNC_SUSPEND_TX
:
487 sci_change_state(&sci_rnc
->sm
, SCI_RNC_TX_SUSPENDED
);
488 sci_rnc
->suspend_type
= scu_get_event_type(event_code
);
490 case SCU_EVENT_TL_RNC_SUSPEND_TX_RX
:
491 sci_change_state(&sci_rnc
->sm
, SCI_RNC_TX_RX_SUSPENDED
);
492 sci_rnc
->suspend_type
= scu_get_event_type(event_code
);
498 case SCI_RNC_AWAIT_SUSPENSION
:
499 switch (scu_get_event_type(event_code
)) {
500 case SCU_EVENT_TL_RNC_SUSPEND_TX
:
501 next_state
= SCI_RNC_TX_SUSPENDED
;
503 case SCU_EVENT_TL_RNC_SUSPEND_TX_RX
:
504 next_state
= SCI_RNC_TX_RX_SUSPENDED
;
509 if (sci_rnc
->suspend_type
== scu_get_event_type(event_code
))
510 sci_change_state(&sci_rnc
->sm
, next_state
);
513 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
514 "%s: invalid state: %s\n", __func__
,
515 rnc_state_name(state
));
516 return SCI_FAILURE_INVALID_STATE
;
521 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
522 "%s: code: %#x state: %s\n", __func__
, event_code
,
523 rnc_state_name(state
));
528 enum sci_status
sci_remote_node_context_destruct(struct sci_remote_node_context
*sci_rnc
,
529 scics_sds_remote_node_context_callback cb_fn
,
532 enum scis_sds_remote_node_context_states state
;
534 state
= sci_rnc
->sm
.current_state_id
;
536 case SCI_RNC_INVALIDATING
:
537 sci_remote_node_context_setup_to_destroy(sci_rnc
, cb_fn
, cb_p
);
539 case SCI_RNC_POSTING
:
540 case SCI_RNC_RESUMING
:
542 case SCI_RNC_TX_SUSPENDED
:
543 case SCI_RNC_TX_RX_SUSPENDED
:
544 sci_remote_node_context_setup_to_destroy(sci_rnc
, cb_fn
, cb_p
);
545 sci_change_state(&sci_rnc
->sm
, SCI_RNC_INVALIDATING
);
547 case SCI_RNC_AWAIT_SUSPENSION
:
548 sci_remote_node_context_setup_to_destroy(sci_rnc
, cb_fn
, cb_p
);
550 case SCI_RNC_INITIAL
:
551 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
552 "%s: invalid state: %s\n", __func__
,
553 rnc_state_name(state
));
554 /* We have decided that the destruct request on the remote node context
555 * can not fail since it is either in the initial/destroyed state or is
560 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
561 "%s: invalid state %s\n", __func__
,
562 rnc_state_name(state
));
563 return SCI_FAILURE_INVALID_STATE
;
567 enum sci_status
sci_remote_node_context_suspend(
568 struct sci_remote_node_context
*sci_rnc
,
569 enum sci_remote_node_suspension_reasons suspend_reason
,
572 enum scis_sds_remote_node_context_states state
573 = sci_rnc
->sm
.current_state_id
;
574 struct isci_remote_device
*idev
= rnc_to_dev(sci_rnc
);
575 enum sci_status status
= SCI_FAILURE_INVALID_STATE
;
576 enum sci_remote_node_context_destination_state dest_param
=
577 RNC_DEST_UNSPECIFIED
;
579 dev_dbg(scirdev_to_dev(idev
),
580 "%s: current state %s, current suspend_type %x dest state %d,"
581 " arg suspend_reason %d, arg suspend_type %x",
582 __func__
, rnc_state_name(state
), sci_rnc
->suspend_type
,
583 sci_rnc
->destination_state
, suspend_reason
,
586 /* Disable automatic state continuations if explicitly suspending. */
587 if ((suspend_reason
== SCI_HW_SUSPEND
) ||
588 (sci_rnc
->destination_state
== RNC_DEST_FINAL
))
589 dest_param
= sci_rnc
->destination_state
;
594 case SCI_RNC_INVALIDATING
:
595 if (sci_rnc
->destination_state
== RNC_DEST_FINAL
) {
596 dev_warn(scirdev_to_dev(idev
),
597 "%s: already destroying %p\n",
599 return SCI_FAILURE_INVALID_STATE
;
601 /* Fall through and handle like SCI_RNC_POSTING */
602 case SCI_RNC_RESUMING
:
603 /* Fall through and handle like SCI_RNC_POSTING */
604 case SCI_RNC_POSTING
:
605 /* Set the destination state to AWAIT - this signals the
606 * entry into the SCI_RNC_READY state that a suspension
607 * needs to be done immediately.
609 if (sci_rnc
->destination_state
!= RNC_DEST_FINAL
)
610 sci_rnc
->destination_state
= RNC_DEST_SUSPENDED
;
611 sci_rnc
->suspend_type
= suspend_type
;
612 sci_rnc
->suspend_reason
= suspend_reason
;
615 case SCI_RNC_TX_SUSPENDED
:
616 if (suspend_type
== SCU_EVENT_TL_RNC_SUSPEND_TX
)
617 status
= SCI_SUCCESS
;
619 case SCI_RNC_TX_RX_SUSPENDED
:
620 if (suspend_type
== SCU_EVENT_TL_RNC_SUSPEND_TX_RX
)
621 status
= SCI_SUCCESS
;
623 case SCI_RNC_AWAIT_SUSPENSION
:
624 if ((sci_rnc
->suspend_type
== SCU_EVENT_TL_RNC_SUSPEND_TX_RX
)
625 || (suspend_type
== sci_rnc
->suspend_type
))
629 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
630 "%s: invalid state %s\n", __func__
,
631 rnc_state_name(state
));
632 return SCI_FAILURE_INVALID_STATE
;
634 sci_rnc
->destination_state
= dest_param
;
635 sci_rnc
->suspend_type
= suspend_type
;
636 sci_rnc
->suspend_reason
= suspend_reason
;
638 if (status
== SCI_SUCCESS
) { /* Already in the destination state? */
639 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
641 wake_up_all(&ihost
->eventq
); /* Let observers look. */
644 if ((suspend_reason
== SCI_SW_SUSPEND_NORMAL
) ||
645 (suspend_reason
== SCI_SW_SUSPEND_LINKHANG_DETECT
)) {
647 if (suspend_reason
== SCI_SW_SUSPEND_LINKHANG_DETECT
)
648 isci_dev_set_hang_detection_timeout(idev
, 0x00000001);
650 sci_remote_device_post_request(
651 idev
, SCI_SOFTWARE_SUSPEND_CMD
);
653 if (state
!= SCI_RNC_AWAIT_SUSPENSION
)
654 sci_change_state(&sci_rnc
->sm
, SCI_RNC_AWAIT_SUSPENSION
);
659 enum sci_status
sci_remote_node_context_resume(struct sci_remote_node_context
*sci_rnc
,
660 scics_sds_remote_node_context_callback cb_fn
,
663 enum scis_sds_remote_node_context_states state
;
664 struct isci_remote_device
*idev
= rnc_to_dev(sci_rnc
);
666 state
= sci_rnc
->sm
.current_state_id
;
667 dev_dbg(scirdev_to_dev(idev
),
668 "%s: state %s, cb_fn = %p, cb_p = %p; dest_state = %d; "
669 "dev resume path %s\n",
670 __func__
, rnc_state_name(state
), cb_fn
, cb_p
,
671 sci_rnc
->destination_state
,
672 test_bit(IDEV_ABORT_PATH_ACTIVE
, &idev
->flags
)
673 ? "<abort active>" : "<normal>");
676 case SCI_RNC_INITIAL
:
677 if (sci_rnc
->remote_node_index
== SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX
)
678 return SCI_FAILURE_INVALID_STATE
;
680 sci_remote_node_context_setup_to_resume(sci_rnc
, cb_fn
, cb_p
,
682 if (!test_bit(IDEV_ABORT_PATH_ACTIVE
, &idev
->flags
)) {
683 sci_remote_node_context_construct_buffer(sci_rnc
);
684 sci_change_state(&sci_rnc
->sm
, SCI_RNC_POSTING
);
688 case SCI_RNC_POSTING
:
689 case SCI_RNC_INVALIDATING
:
690 case SCI_RNC_RESUMING
:
691 /* We are still waiting to post when a resume was
694 switch (sci_rnc
->destination_state
) {
695 case RNC_DEST_SUSPENDED
:
696 case RNC_DEST_SUSPENDED_RESUME
:
697 /* Previously waiting to suspend after posting.
698 * Now continue onto resumption.
700 sci_remote_node_context_setup_to_resume(
701 sci_rnc
, cb_fn
, cb_p
,
702 RNC_DEST_SUSPENDED_RESUME
);
705 sci_remote_node_context_setup_to_resume(
706 sci_rnc
, cb_fn
, cb_p
,
712 case SCI_RNC_TX_SUSPENDED
:
713 case SCI_RNC_TX_RX_SUSPENDED
:
715 struct domain_device
*dev
= idev
->domain_dev
;
716 /* If this is an expander attached SATA device we must
717 * invalidate and repost the RNC since this is the only
718 * way to clear the TCi to NCQ tag mapping table for
719 * the RNi. All other device types we can just resume.
721 sci_remote_node_context_setup_to_resume(
722 sci_rnc
, cb_fn
, cb_p
, RNC_DEST_READY
);
724 if (!test_bit(IDEV_ABORT_PATH_ACTIVE
, &idev
->flags
)) {
725 if ((dev_is_sata(dev
) && dev
->parent
) ||
726 (sci_rnc
->destination_state
== RNC_DEST_FINAL
))
727 sci_change_state(&sci_rnc
->sm
,
728 SCI_RNC_INVALIDATING
);
730 sci_change_state(&sci_rnc
->sm
,
736 case SCI_RNC_AWAIT_SUSPENSION
:
737 sci_remote_node_context_setup_to_resume(
738 sci_rnc
, cb_fn
, cb_p
, RNC_DEST_SUSPENDED_RESUME
);
741 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
742 "%s: invalid state %s\n", __func__
,
743 rnc_state_name(state
));
744 return SCI_FAILURE_INVALID_STATE
;
748 enum sci_status
sci_remote_node_context_start_io(struct sci_remote_node_context
*sci_rnc
,
749 struct isci_request
*ireq
)
751 enum scis_sds_remote_node_context_states state
;
753 state
= sci_rnc
->sm
.current_state_id
;
758 case SCI_RNC_TX_SUSPENDED
:
759 case SCI_RNC_TX_RX_SUSPENDED
:
760 case SCI_RNC_AWAIT_SUSPENSION
:
761 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
762 "%s: invalid state %s\n", __func__
,
763 rnc_state_name(state
));
764 return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED
;
766 dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
767 "%s: invalid state %s\n", __func__
,
768 rnc_state_name(state
));
769 return SCI_FAILURE_INVALID_STATE
;
773 enum sci_status
sci_remote_node_context_start_task(
774 struct sci_remote_node_context
*sci_rnc
,
775 struct isci_request
*ireq
,
776 scics_sds_remote_node_context_callback cb_fn
,
779 enum sci_status status
= sci_remote_node_context_resume(sci_rnc
,
781 if (status
!= SCI_SUCCESS
)
782 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
783 "%s: resume failed: %d\n", __func__
, status
);
787 int sci_remote_node_context_is_safe_to_abort(
788 struct sci_remote_node_context
*sci_rnc
)
790 enum scis_sds_remote_node_context_states state
;
792 state
= sci_rnc
->sm
.current_state_id
;
794 case SCI_RNC_INVALIDATING
:
795 case SCI_RNC_TX_RX_SUSPENDED
:
797 case SCI_RNC_POSTING
:
798 case SCI_RNC_RESUMING
:
800 case SCI_RNC_TX_SUSPENDED
:
801 case SCI_RNC_AWAIT_SUSPENSION
:
802 case SCI_RNC_INITIAL
:
805 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc
)),
806 "%s: invalid state %d\n", __func__
, state
);