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58 #include "remote_device.h"
59 #include "remote_node_context.h"
60 #include "scu_event_codes.h"
61 #include "scu_task_context.h"
66 * @sci_rnc: The RNC for which the is posted request is being made.
68 * This method will return true if the RNC is not in the initial state. In all
69 * other states the RNC is considered active and this will return true. The
70 * destroy request of the state machine drives the RNC back to the initial
71 * state. If the state machine changes then this routine will also have to be
72 * changed. bool true if the state machine is not in the initial state false if
73 * the state machine is in the initial state
78 * @sci_rnc: The state of the remote node context object to check.
80 * This method will return true if the remote node context is in a READY state
81 * otherwise it will return false bool true if the remote node context is in
82 * the ready state. false if the remote node context is not in the ready state.
84 bool scic_sds_remote_node_context_is_ready(
85 struct scic_sds_remote_node_context *sci_rnc)
87 u32 current_state = sci_rnc->sm.current_state_id;
89 if (current_state == SCI_RNC_READY) {
98 * @sci_dev: The remote device to use to construct the RNC buffer.
99 * @rnc: The buffer into which the remote device data will be copied.
101 * This method will construct the RNC buffer for this remote device object. none
103 static void scic_sds_remote_node_context_construct_buffer(
104 struct scic_sds_remote_node_context *sci_rnc)
106 struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc);
107 struct domain_device *dev = sci_dev_to_domain(sci_dev);
108 int rni = sci_rnc->remote_node_index;
109 union scu_remote_node_context *rnc;
110 struct scic_sds_controller *scic;
113 scic = scic_sds_remote_device_get_controller(sci_dev);
114 rnc = scic_sds_controller_get_remote_node_context_buffer(scic, rni);
116 memset(rnc, 0, sizeof(union scu_remote_node_context)
117 * scic_sds_remote_device_node_count(sci_dev));
119 rnc->ssp.remote_node_index = rni;
120 rnc->ssp.remote_node_port_width = sci_dev->device_port_width;
121 rnc->ssp.logical_port_index = sci_dev->owning_port->physical_port_index;
123 /* sas address is __be64, context ram format is __le64 */
124 sas_addr = cpu_to_le64(SAS_ADDR(dev->sas_addr));
125 rnc->ssp.remote_sas_address_hi = upper_32_bits(sas_addr);
126 rnc->ssp.remote_sas_address_lo = lower_32_bits(sas_addr);
128 rnc->ssp.nexus_loss_timer_enable = true;
129 rnc->ssp.check_bit = false;
130 rnc->ssp.is_valid = false;
131 rnc->ssp.is_remote_node_context = true;
132 rnc->ssp.function_number = 0;
134 rnc->ssp.arbitration_wait_time = 0;
136 if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
137 rnc->ssp.connection_occupancy_timeout =
138 scic->user_parameters.sds1.stp_max_occupancy_timeout;
139 rnc->ssp.connection_inactivity_timeout =
140 scic->user_parameters.sds1.stp_inactivity_timeout;
142 rnc->ssp.connection_occupancy_timeout =
143 scic->user_parameters.sds1.ssp_max_occupancy_timeout;
144 rnc->ssp.connection_inactivity_timeout =
145 scic->user_parameters.sds1.ssp_inactivity_timeout;
148 rnc->ssp.initial_arbitration_wait_time = 0;
150 /* Open Address Frame Parameters */
151 rnc->ssp.oaf_connection_rate = sci_dev->connection_rate;
152 rnc->ssp.oaf_features = 0;
153 rnc->ssp.oaf_source_zone_group = 0;
154 rnc->ssp.oaf_more_compatibility_features = 0;
161 * @callback_parameter:
163 * This method will setup the remote node context object so it will transition
164 * to its ready state. If the remote node context is already setup to
165 * transition to its final state then this function does nothing. none
167 static void scic_sds_remote_node_context_setup_to_resume(
168 struct scic_sds_remote_node_context *sci_rnc,
169 scics_sds_remote_node_context_callback callback,
170 void *callback_parameter)
172 if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL) {
173 sci_rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY;
174 sci_rnc->user_callback = callback;
175 sci_rnc->user_cookie = callback_parameter;
179 static void scic_sds_remote_node_context_setup_to_destory(
180 struct scic_sds_remote_node_context *sci_rnc,
181 scics_sds_remote_node_context_callback callback,
182 void *callback_parameter)
184 sci_rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL;
185 sci_rnc->user_callback = callback;
186 sci_rnc->user_cookie = callback_parameter;
192 * This method just calls the user callback function and then resets the
195 static void scic_sds_remote_node_context_notify_user(
196 struct scic_sds_remote_node_context *rnc)
198 if (rnc->user_callback != NULL) {
199 (*rnc->user_callback)(rnc->user_cookie);
201 rnc->user_callback = NULL;
202 rnc->user_cookie = NULL;
206 static void scic_sds_remote_node_context_continue_state_transitions(struct scic_sds_remote_node_context *rnc)
208 if (rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY)
209 scic_sds_remote_node_context_resume(rnc, rnc->user_callback,
215 * @sci_rnc: The remote node context object that is to be validated.
217 * This method will mark the rnc buffer as being valid and post the request to
220 static void scic_sds_remote_node_context_validate_context_buffer(
221 struct scic_sds_remote_node_context *sci_rnc)
223 struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc);
224 struct domain_device *dev = sci_dev_to_domain(sci_dev);
225 union scu_remote_node_context *rnc_buffer;
227 rnc_buffer = scic_sds_controller_get_remote_node_context_buffer(
228 scic_sds_remote_device_get_controller(sci_dev),
229 sci_rnc->remote_node_index
232 rnc_buffer->ssp.is_valid = true;
234 if (!sci_dev->is_direct_attached &&
235 (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))) {
236 scic_sds_remote_device_post_request(sci_dev,
237 SCU_CONTEXT_COMMAND_POST_RNC_96);
239 scic_sds_remote_device_post_request(sci_dev, SCU_CONTEXT_COMMAND_POST_RNC_32);
241 if (sci_dev->is_direct_attached) {
242 scic_sds_port_setup_transports(sci_dev->owning_port,
243 sci_rnc->remote_node_index);
250 * @sci_rnc: The remote node context object that is to be invalidated.
252 * This method will update the RNC buffer and post the invalidate request. none
254 static void scic_sds_remote_node_context_invalidate_context_buffer(
255 struct scic_sds_remote_node_context *sci_rnc)
257 union scu_remote_node_context *rnc_buffer;
259 rnc_buffer = scic_sds_controller_get_remote_node_context_buffer(
260 scic_sds_remote_device_get_controller(rnc_to_dev(sci_rnc)),
261 sci_rnc->remote_node_index);
263 rnc_buffer->ssp.is_valid = false;
265 scic_sds_remote_device_post_request(rnc_to_dev(sci_rnc),
266 SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE);
269 static void scic_sds_remote_node_context_initial_state_enter(struct sci_base_state_machine *sm)
271 struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
273 /* Check to see if we have gotten back to the initial state because
274 * someone requested to destroy the remote node context object.
276 if (sm->previous_state_id == SCI_RNC_INVALIDATING) {
277 rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED;
278 scic_sds_remote_node_context_notify_user(rnc);
282 static void scic_sds_remote_node_context_posting_state_enter(struct sci_base_state_machine *sm)
284 struct scic_sds_remote_node_context *sci_rnc = container_of(sm, typeof(*sci_rnc), sm);
286 scic_sds_remote_node_context_validate_context_buffer(sci_rnc);
289 static void scic_sds_remote_node_context_invalidating_state_enter(struct sci_base_state_machine *sm)
291 struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
293 scic_sds_remote_node_context_invalidate_context_buffer(rnc);
296 static void scic_sds_remote_node_context_resuming_state_enter(struct sci_base_state_machine *sm)
298 struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
299 struct scic_sds_remote_device *sci_dev;
300 struct domain_device *dev;
302 sci_dev = rnc_to_dev(rnc);
303 dev = sci_dev_to_domain(sci_dev);
306 * For direct attached SATA devices we need to clear the TLCR
307 * NCQ to TCi tag mapping on the phy and in cases where we
308 * resume because of a target reset we also need to update
309 * the STPTLDARNI register with the RNi of the device
311 if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) &&
312 sci_dev->is_direct_attached)
313 scic_sds_port_setup_transports(sci_dev->owning_port,
314 rnc->remote_node_index);
316 scic_sds_remote_device_post_request(sci_dev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME);
319 static void scic_sds_remote_node_context_ready_state_enter(struct sci_base_state_machine *sm)
321 struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
323 rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED;
325 if (rnc->user_callback)
326 scic_sds_remote_node_context_notify_user(rnc);
329 static void scic_sds_remote_node_context_tx_suspended_state_enter(struct sci_base_state_machine *sm)
331 struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
333 scic_sds_remote_node_context_continue_state_transitions(rnc);
336 static void scic_sds_remote_node_context_tx_rx_suspended_state_enter(struct sci_base_state_machine *sm)
338 struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
340 scic_sds_remote_node_context_continue_state_transitions(rnc);
343 static const struct sci_base_state scic_sds_remote_node_context_state_table[] = {
344 [SCI_RNC_INITIAL] = {
345 .enter_state = scic_sds_remote_node_context_initial_state_enter,
347 [SCI_RNC_POSTING] = {
348 .enter_state = scic_sds_remote_node_context_posting_state_enter,
350 [SCI_RNC_INVALIDATING] = {
351 .enter_state = scic_sds_remote_node_context_invalidating_state_enter,
353 [SCI_RNC_RESUMING] = {
354 .enter_state = scic_sds_remote_node_context_resuming_state_enter,
357 .enter_state = scic_sds_remote_node_context_ready_state_enter,
359 [SCI_RNC_TX_SUSPENDED] = {
360 .enter_state = scic_sds_remote_node_context_tx_suspended_state_enter,
362 [SCI_RNC_TX_RX_SUSPENDED] = {
363 .enter_state = scic_sds_remote_node_context_tx_rx_suspended_state_enter,
365 [SCI_RNC_AWAIT_SUSPENSION] = { },
368 void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context *rnc,
369 u16 remote_node_index)
371 memset(rnc, 0, sizeof(struct scic_sds_remote_node_context));
373 rnc->remote_node_index = remote_node_index;
374 rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED;
376 sci_init_sm(&rnc->sm, scic_sds_remote_node_context_state_table, SCI_RNC_INITIAL);
379 enum sci_status scic_sds_remote_node_context_event_handler(struct scic_sds_remote_node_context *sci_rnc,
382 enum scis_sds_remote_node_context_states state;
384 state = sci_rnc->sm.current_state_id;
386 case SCI_RNC_POSTING:
387 switch (scu_get_event_code(event_code)) {
388 case SCU_EVENT_POST_RNC_COMPLETE:
389 sci_change_state(&sci_rnc->sm, SCI_RNC_READY);
395 case SCI_RNC_INVALIDATING:
396 if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) {
397 if (sci_rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL)
398 state = SCI_RNC_INITIAL;
400 state = SCI_RNC_POSTING;
401 sci_change_state(&sci_rnc->sm, state);
403 switch (scu_get_event_type(event_code)) {
404 case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
405 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
406 /* We really dont care if the hardware is going to suspend
407 * the device since it's being invalidated anyway */
408 dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
409 "%s: SCIC Remote Node Context 0x%p was "
410 "suspeneded by hardware while being "
411 "invalidated.\n", __func__, sci_rnc);
418 case SCI_RNC_RESUMING:
419 if (scu_get_event_code(event_code) == SCU_EVENT_POST_RCN_RELEASE) {
420 sci_change_state(&sci_rnc->sm, SCI_RNC_READY);
422 switch (scu_get_event_type(event_code)) {
423 case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
424 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
425 /* We really dont care if the hardware is going to suspend
426 * the device since it's being resumed anyway */
427 dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
428 "%s: SCIC Remote Node Context 0x%p was "
429 "suspeneded by hardware while being resumed.\n",
438 switch (scu_get_event_type(event_code)) {
439 case SCU_EVENT_TL_RNC_SUSPEND_TX:
440 sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED);
441 sci_rnc->suspension_code = scu_get_event_specifier(event_code);
443 case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
444 sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
445 sci_rnc->suspension_code = scu_get_event_specifier(event_code);
451 case SCI_RNC_AWAIT_SUSPENSION:
452 switch (scu_get_event_type(event_code)) {
453 case SCU_EVENT_TL_RNC_SUSPEND_TX:
454 sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED);
455 sci_rnc->suspension_code = scu_get_event_specifier(event_code);
457 case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
458 sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
459 sci_rnc->suspension_code = scu_get_event_specifier(event_code);
466 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
467 "%s: invalid state %d\n", __func__, state);
468 return SCI_FAILURE_INVALID_STATE;
473 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
474 "%s: code: %#x state: %d\n", __func__, event_code, state);
479 enum sci_status scic_sds_remote_node_context_destruct(struct scic_sds_remote_node_context *sci_rnc,
480 scics_sds_remote_node_context_callback cb_fn,
483 enum scis_sds_remote_node_context_states state;
485 state = sci_rnc->sm.current_state_id;
487 case SCI_RNC_INVALIDATING:
488 scic_sds_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p);
490 case SCI_RNC_POSTING:
491 case SCI_RNC_RESUMING:
493 case SCI_RNC_TX_SUSPENDED:
494 case SCI_RNC_TX_RX_SUSPENDED:
495 case SCI_RNC_AWAIT_SUSPENSION:
496 scic_sds_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p);
497 sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING);
499 case SCI_RNC_INITIAL:
500 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
501 "%s: invalid state %d\n", __func__, state);
502 /* We have decided that the destruct request on the remote node context
503 * can not fail since it is either in the initial/destroyed state or is
508 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
509 "%s: invalid state %d\n", __func__, state);
510 return SCI_FAILURE_INVALID_STATE;
514 enum sci_status scic_sds_remote_node_context_suspend(struct scic_sds_remote_node_context *sci_rnc,
516 scics_sds_remote_node_context_callback cb_fn,
519 enum scis_sds_remote_node_context_states state;
521 state = sci_rnc->sm.current_state_id;
522 if (state != SCI_RNC_READY) {
523 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
524 "%s: invalid state %d\n", __func__, state);
525 return SCI_FAILURE_INVALID_STATE;
528 sci_rnc->user_callback = cb_fn;
529 sci_rnc->user_cookie = cb_p;
530 sci_rnc->suspension_code = suspend_type;
532 if (suspend_type == SCI_SOFTWARE_SUSPENSION) {
533 scic_sds_remote_device_post_request(rnc_to_dev(sci_rnc),
534 SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX);
537 sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION);
541 enum sci_status scic_sds_remote_node_context_resume(struct scic_sds_remote_node_context *sci_rnc,
542 scics_sds_remote_node_context_callback cb_fn,
545 enum scis_sds_remote_node_context_states state;
547 state = sci_rnc->sm.current_state_id;
549 case SCI_RNC_INITIAL:
550 if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
551 return SCI_FAILURE_INVALID_STATE;
553 scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
554 scic_sds_remote_node_context_construct_buffer(sci_rnc);
555 sci_change_state(&sci_rnc->sm, SCI_RNC_POSTING);
557 case SCI_RNC_POSTING:
558 case SCI_RNC_INVALIDATING:
559 case SCI_RNC_RESUMING:
560 if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY)
561 return SCI_FAILURE_INVALID_STATE;
563 sci_rnc->user_callback = cb_fn;
564 sci_rnc->user_cookie = cb_p;
566 case SCI_RNC_TX_SUSPENDED: {
567 struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc);
568 struct domain_device *dev = sci_dev_to_domain(sci_dev);
570 scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
572 /* TODO: consider adding a resume action of NONE, INVALIDATE, WRITE_TLCR */
573 if (dev->dev_type == SAS_END_DEV || dev_is_expander(dev))
574 sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING);
575 else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
576 if (sci_dev->is_direct_attached) {
577 /* @todo Fix this since I am being silly in writing to the STPTLDARNI register. */
578 sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING);
580 sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING);
586 case SCI_RNC_TX_RX_SUSPENDED:
587 scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
588 sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING);
589 return SCI_FAILURE_INVALID_STATE;
590 case SCI_RNC_AWAIT_SUSPENSION:
591 scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
594 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
595 "%s: invalid state %d\n", __func__, state);
596 return SCI_FAILURE_INVALID_STATE;
600 enum sci_status scic_sds_remote_node_context_start_io(struct scic_sds_remote_node_context *sci_rnc,
601 struct isci_request *ireq)
603 enum scis_sds_remote_node_context_states state;
605 state = sci_rnc->sm.current_state_id;
610 case SCI_RNC_TX_SUSPENDED:
611 case SCI_RNC_TX_RX_SUSPENDED:
612 case SCI_RNC_AWAIT_SUSPENSION:
613 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
614 "%s: invalid state %d\n", __func__, state);
615 return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED;
619 dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
620 "%s: requested to start IO while still resuming, %d\n",
622 return SCI_FAILURE_INVALID_STATE;
625 enum sci_status scic_sds_remote_node_context_start_task(struct scic_sds_remote_node_context *sci_rnc,
626 struct isci_request *ireq)
628 enum scis_sds_remote_node_context_states state;
630 state = sci_rnc->sm.current_state_id;
632 case SCI_RNC_RESUMING:
634 case SCI_RNC_AWAIT_SUSPENSION:
636 case SCI_RNC_TX_SUSPENDED:
637 case SCI_RNC_TX_RX_SUSPENDED:
638 scic_sds_remote_node_context_resume(sci_rnc, NULL, NULL);
641 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
642 "%s: invalid state %d\n", __func__, state);
643 return SCI_FAILURE_INVALID_STATE;