isci: cleanup remote device construction and comments
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / isci / remote_device.c
blob70641818f6029960869bc7a9568636a71fcfd923
1 /*
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.
5 * GPL LICENSE SUMMARY
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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10 * it under the terms of version 2 of the GNU General Public License as
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26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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55 #include "intel_sas.h"
56 #include "isci.h"
57 #include "port.h"
58 #include "remote_device.h"
59 #include "request.h"
60 #include "scic_controller.h"
61 #include "scic_io_request.h"
62 #include "scic_phy.h"
63 #include "scic_port.h"
64 #include "scic_sds_controller.h"
65 #include "scic_sds_phy.h"
66 #include "scic_sds_port.h"
67 #include "remote_node_context.h"
68 #include "scic_sds_request.h"
69 #include "sci_environment.h"
70 #include "sci_util.h"
71 #include "scu_event_codes.h"
72 #include "task.h"
74 enum sci_status scic_remote_device_stop(
75 struct scic_sds_remote_device *sci_dev,
76 u32 timeout)
78 return sci_dev->state_handlers->stop_handler(sci_dev);
82 enum sci_status scic_remote_device_reset(
83 struct scic_sds_remote_device *sci_dev)
85 return sci_dev->state_handlers->reset_handler(sci_dev);
89 enum sci_status scic_remote_device_reset_complete(
90 struct scic_sds_remote_device *sci_dev)
92 return sci_dev->state_handlers->reset_complete_handler(sci_dev);
96 enum sas_linkrate scic_remote_device_get_connection_rate(
97 struct scic_sds_remote_device *sci_dev)
99 return sci_dev->connection_rate;
103 void scic_remote_device_get_protocols(
104 struct scic_sds_remote_device *sci_dev,
105 struct smp_discover_response_protocols *pr)
107 pr->u.all = sci_dev->target_protocols.u.all;
110 #if !defined(DISABLE_ATAPI)
111 bool scic_remote_device_is_atapi(struct scic_sds_remote_device *sci_dev)
113 return sci_dev->is_atapi;
115 #endif
121 * Remote device timer requirements
123 #define SCIC_SDS_REMOTE_DEVICE_MINIMUM_TIMER_COUNT (0)
124 #define SCIC_SDS_REMOTE_DEVICE_MAXIMUM_TIMER_COUNT (SCI_MAX_REMOTE_DEVICES)
129 * @sci_dev: The remote device for which the suspend is being requested.
131 * This method invokes the remote device suspend state handler. enum sci_status
133 enum sci_status scic_sds_remote_device_suspend(
134 struct scic_sds_remote_device *sci_dev,
135 u32 suspend_type)
137 return sci_dev->state_handlers->suspend_handler(sci_dev, suspend_type);
142 * @sci_dev: The remote device for which the event handling is being
143 * requested.
144 * @frame_index: This is the frame index that is being processed.
146 * This method invokes the frame handler for the remote device state machine
147 * enum sci_status
149 enum sci_status scic_sds_remote_device_frame_handler(
150 struct scic_sds_remote_device *sci_dev,
151 u32 frame_index)
153 return sci_dev->state_handlers->frame_handler(sci_dev, frame_index);
158 * @sci_dev: The remote device for which the event handling is being
159 * requested.
160 * @event_code: This is the event code that is to be processed.
162 * This method invokes the remote device event handler. enum sci_status
164 enum sci_status scic_sds_remote_device_event_handler(
165 struct scic_sds_remote_device *sci_dev,
166 u32 event_code)
168 return sci_dev->state_handlers->event_handler(sci_dev, event_code);
173 * @controller: The controller that is starting the io request.
174 * @sci_dev: The remote device for which the start io handling is being
175 * requested.
176 * @io_request: The io request that is being started.
178 * This method invokes the remote device start io handler. enum sci_status
180 enum sci_status scic_sds_remote_device_start_io(
181 struct scic_sds_controller *controller,
182 struct scic_sds_remote_device *sci_dev,
183 struct scic_sds_request *io_request)
185 return sci_dev->state_handlers->start_io_handler(
186 sci_dev, io_request);
191 * @controller: The controller that is completing the io request.
192 * @sci_dev: The remote device for which the complete io handling is being
193 * requested.
194 * @io_request: The io request that is being completed.
196 * This method invokes the remote device complete io handler. enum sci_status
198 enum sci_status scic_sds_remote_device_complete_io(
199 struct scic_sds_controller *controller,
200 struct scic_sds_remote_device *sci_dev,
201 struct scic_sds_request *io_request)
203 return sci_dev->state_handlers->complete_io_handler(
204 sci_dev, io_request);
209 * @controller: The controller that is starting the task request.
210 * @sci_dev: The remote device for which the start task handling is being
211 * requested.
212 * @io_request: The task request that is being started.
214 * This method invokes the remote device start task handler. enum sci_status
216 enum sci_status scic_sds_remote_device_start_task(
217 struct scic_sds_controller *controller,
218 struct scic_sds_remote_device *sci_dev,
219 struct scic_sds_request *io_request)
221 return sci_dev->state_handlers->start_task_handler(
222 sci_dev, io_request);
227 * @controller: The controller that is completing the task request.
228 * @sci_dev: The remote device for which the complete task handling is
229 * being requested.
230 * @io_request: The task request that is being completed.
232 * This method invokes the remote device complete task handler. enum sci_status
237 * @sci_dev:
238 * @request:
240 * This method takes the request and bulids an appropriate SCU context for the
241 * request and then requests the controller to post the request. none
243 void scic_sds_remote_device_post_request(
244 struct scic_sds_remote_device *sci_dev,
245 u32 request)
247 u32 context;
249 context = scic_sds_remote_device_build_command_context(sci_dev, request);
251 scic_sds_controller_post_request(
252 scic_sds_remote_device_get_controller(sci_dev),
253 context
257 #if !defined(DISABLE_ATAPI)
260 * @sci_dev: The device to be checked.
262 * This method check the signature fis of a stp device to decide whether a
263 * device is atapi or not. true if a device is atapi device. False if a device
264 * is not atapi.
266 bool scic_sds_remote_device_is_atapi(
267 struct scic_sds_remote_device *sci_dev)
269 if (!sci_dev->target_protocols.u.bits.attached_stp_target)
270 return false;
271 else if (sci_dev->is_direct_attached) {
272 struct scic_sds_phy *phy;
273 struct scic_sata_phy_properties properties;
274 struct sata_fis_reg_d2h *signature_fis;
275 phy = scic_sds_port_get_a_connected_phy(sci_dev->owning_port);
276 scic_sata_phy_get_properties(phy, &properties);
278 /* decode the signature fis. */
279 signature_fis = &(properties.signature_fis);
281 if ((signature_fis->sector_count == 0x01)
282 && (signature_fis->lba_low == 0x01)
283 && (signature_fis->lba_mid == 0x14)
284 && (signature_fis->lba_high == 0xEB)
285 && ((signature_fis->device & 0x5F) == 0x00)
287 /* An ATA device supporting the PACKET command set. */
288 return true;
289 } else
290 return false;
291 } else {
292 /* Expander supported ATAPI device is not currently supported. */
293 return false;
296 #endif
300 * @user_parameter: This is cast to a remote device object.
302 * This method is called once the remote node context is ready to be freed.
303 * The remote device can now report that its stop operation is complete. none
305 static void scic_sds_cb_remote_device_rnc_destruct_complete(
306 void *user_parameter)
308 struct scic_sds_remote_device *sci_dev;
310 sci_dev = (struct scic_sds_remote_device *)user_parameter;
312 BUG_ON(sci_dev->started_request_count != 0);
314 sci_base_state_machine_change_state(&sci_dev->state_machine,
315 SCI_BASE_REMOTE_DEVICE_STATE_STOPPED);
320 * @user_parameter: This is cast to a remote device object.
322 * This method is called once the remote node context has transisitioned to a
323 * ready state. This is the indication that the remote device object can also
324 * transition to ready. none
326 static void scic_sds_remote_device_resume_complete_handler(
327 void *user_parameter)
329 struct scic_sds_remote_device *sci_dev;
331 sci_dev = (struct scic_sds_remote_device *)user_parameter;
333 if (
334 sci_base_state_machine_get_state(&sci_dev->state_machine)
335 != SCI_BASE_REMOTE_DEVICE_STATE_READY
337 sci_base_state_machine_change_state(
338 &sci_dev->state_machine,
339 SCI_BASE_REMOTE_DEVICE_STATE_READY
346 * @device: This parameter specifies the device for which the request is being
347 * started.
348 * @request: This parameter specifies the request being started.
349 * @status: This parameter specifies the current start operation status.
351 * This method will perform the STP request start processing common to IO
352 * requests and task requests of all types. none
354 void scic_sds_remote_device_start_request(
355 struct scic_sds_remote_device *sci_dev,
356 struct scic_sds_request *sci_req,
357 enum sci_status status)
359 /* We still have a fault in starting the io complete it on the port */
360 if (status == SCI_SUCCESS)
361 scic_sds_remote_device_increment_request_count(sci_dev);
362 else{
363 sci_dev->owning_port->state_handlers->complete_io_handler(
364 sci_dev->owning_port, sci_dev, sci_req
372 * @request: This parameter specifies the request being continued.
374 * This method will continue to post tc for a STP request. This method usually
375 * serves as a callback when RNC gets resumed during a task management
376 * sequence. none
378 void scic_sds_remote_device_continue_request(void *dev)
380 struct scic_sds_remote_device *sci_dev = dev;
382 /* we need to check if this request is still valid to continue. */
383 if (sci_dev->working_request)
384 scic_controller_continue_io(sci_dev->working_request);
388 * This method will terminate all of the IO requests in the controllers IO
389 * request table that were targeted for this device.
390 * @sci_dev: This parameter specifies the remote device for which to
391 * attempt to terminate all requests.
393 * This method returns an indication as to whether all requests were
394 * successfully terminated. If a single request fails to be terminated, then
395 * this method will return the failure.
397 static enum sci_status scic_sds_remote_device_terminate_requests(
398 struct scic_sds_remote_device *sci_dev)
400 enum sci_status status = SCI_SUCCESS;
401 enum sci_status terminate_status = SCI_SUCCESS;
402 struct scic_sds_request *sci_req;
403 u32 index;
404 u32 request_count = sci_dev->started_request_count;
406 for (index = 0;
407 (index < SCI_MAX_IO_REQUESTS) && (request_count > 0);
408 index++) {
409 sci_req = sci_dev->owning_port->owning_controller->io_request_table[index];
411 if ((sci_req != NULL) && (sci_req->target_device == sci_dev)) {
412 terminate_status = scic_controller_terminate_request(
413 sci_dev->owning_port->owning_controller,
414 sci_dev,
415 sci_req
418 if (terminate_status != SCI_SUCCESS)
419 status = terminate_status;
421 request_count--;
425 return status;
428 static enum sci_status
429 default_device_handler(struct scic_sds_remote_device *sci_dev,
430 const char *func)
432 dev_warn(scirdev_to_dev(sci_dev),
433 "%s: in wrong state: %d\n", func,
434 sci_base_state_machine_get_state(&sci_dev->state_machine));
435 return SCI_FAILURE_INVALID_STATE;
438 enum sci_status scic_sds_remote_device_default_start_handler(
439 struct scic_sds_remote_device *sci_dev)
441 return default_device_handler(sci_dev, __func__);
444 static enum sci_status scic_sds_remote_device_default_stop_handler(
445 struct scic_sds_remote_device *sci_dev)
447 return default_device_handler(sci_dev, __func__);
450 enum sci_status scic_sds_remote_device_default_fail_handler(
451 struct scic_sds_remote_device *sci_dev)
453 return default_device_handler(sci_dev, __func__);
456 enum sci_status scic_sds_remote_device_default_destruct_handler(
457 struct scic_sds_remote_device *sci_dev)
459 return default_device_handler(sci_dev, __func__);
462 enum sci_status scic_sds_remote_device_default_reset_handler(
463 struct scic_sds_remote_device *sci_dev)
465 return default_device_handler(sci_dev, __func__);
468 enum sci_status scic_sds_remote_device_default_reset_complete_handler(
469 struct scic_sds_remote_device *sci_dev)
471 return default_device_handler(sci_dev, __func__);
474 enum sci_status scic_sds_remote_device_default_suspend_handler(
475 struct scic_sds_remote_device *sci_dev, u32 suspend_type)
477 return default_device_handler(sci_dev, __func__);
480 enum sci_status scic_sds_remote_device_default_resume_handler(
481 struct scic_sds_remote_device *sci_dev)
483 return default_device_handler(sci_dev, __func__);
488 * @device: The struct scic_sds_remote_device which is then cast into a
489 * struct scic_sds_remote_device.
490 * @event_code: The event code that the struct scic_sds_controller wants the device
491 * object to process.
493 * This method is the default event handler. It will call the RNC state
494 * machine handler for any RNC events otherwise it will log a warning and
495 * returns a failure. enum sci_status SCI_FAILURE_INVALID_STATE
497 static enum sci_status scic_sds_remote_device_core_event_handler(
498 struct scic_sds_remote_device *sci_dev,
499 u32 event_code,
500 bool is_ready_state)
502 enum sci_status status;
504 switch (scu_get_event_type(event_code)) {
505 case SCU_EVENT_TYPE_RNC_OPS_MISC:
506 case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
507 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
508 status = scic_sds_remote_node_context_event_handler(&sci_dev->rnc, event_code);
509 break;
510 case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT:
512 if (scu_get_event_code(event_code) == SCU_EVENT_IT_NEXUS_TIMEOUT) {
513 status = SCI_SUCCESS;
515 /* Suspend the associated RNC */
516 scic_sds_remote_node_context_suspend(&sci_dev->rnc,
517 SCI_SOFTWARE_SUSPENSION,
518 NULL, NULL);
520 dev_dbg(scirdev_to_dev(sci_dev),
521 "%s: device: %p event code: %x: %s\n",
522 __func__, sci_dev, event_code,
523 (is_ready_state)
524 ? "I_T_Nexus_Timeout event"
525 : "I_T_Nexus_Timeout event in wrong state");
527 break;
529 /* Else, fall through and treat as unhandled... */
531 default:
532 dev_dbg(scirdev_to_dev(sci_dev),
533 "%s: device: %p event code: %x: %s\n",
534 __func__, sci_dev, event_code,
535 (is_ready_state)
536 ? "unexpected event"
537 : "unexpected event in wrong state");
538 status = SCI_FAILURE_INVALID_STATE;
539 break;
542 return status;
546 * @device: The struct scic_sds_remote_device which is then cast into a
547 * struct scic_sds_remote_device.
548 * @event_code: The event code that the struct scic_sds_controller wants the device
549 * object to process.
551 * This method is the default event handler. It will call the RNC state
552 * machine handler for any RNC events otherwise it will log a warning and
553 * returns a failure. enum sci_status SCI_FAILURE_INVALID_STATE
555 static enum sci_status scic_sds_remote_device_default_event_handler(
556 struct scic_sds_remote_device *sci_dev,
557 u32 event_code)
559 return scic_sds_remote_device_core_event_handler(sci_dev,
560 event_code,
561 false);
566 * @device: The struct scic_sds_remote_device which is then cast into a
567 * struct scic_sds_remote_device.
568 * @frame_index: The frame index for which the struct scic_sds_controller wants this
569 * device object to process.
571 * This method is the default unsolicited frame handler. It logs a warning,
572 * releases the frame and returns a failure. enum sci_status
573 * SCI_FAILURE_INVALID_STATE
575 enum sci_status scic_sds_remote_device_default_frame_handler(
576 struct scic_sds_remote_device *sci_dev,
577 u32 frame_index)
579 dev_warn(scirdev_to_dev(sci_dev),
580 "%s: SCIC Remote Device requested to handle frame %x "
581 "while in wrong state %d\n",
582 __func__,
583 frame_index,
584 sci_base_state_machine_get_state(
585 &sci_dev->state_machine));
587 /* Return the frame back to the controller */
588 scic_sds_controller_release_frame(
589 scic_sds_remote_device_get_controller(sci_dev), frame_index
592 return SCI_FAILURE_INVALID_STATE;
595 enum sci_status scic_sds_remote_device_default_start_request_handler(
596 struct scic_sds_remote_device *sci_dev,
597 struct scic_sds_request *request)
599 return default_device_handler(sci_dev, __func__);
602 enum sci_status scic_sds_remote_device_default_complete_request_handler(
603 struct scic_sds_remote_device *sci_dev,
604 struct scic_sds_request *request)
606 return default_device_handler(sci_dev, __func__);
609 enum sci_status scic_sds_remote_device_default_continue_request_handler(
610 struct scic_sds_remote_device *sci_dev,
611 struct scic_sds_request *request)
613 return default_device_handler(sci_dev, __func__);
618 * @device: The struct scic_sds_remote_device which is then cast into a
619 * struct scic_sds_remote_device.
620 * @frame_index: The frame index for which the struct scic_sds_controller wants this
621 * device object to process.
623 * This method is a general ssp frame handler. In most cases the device object
624 * needs to route the unsolicited frame processing to the io request object.
625 * This method decodes the tag for the io request object and routes the
626 * unsolicited frame to that object. enum sci_status SCI_FAILURE_INVALID_STATE
628 enum sci_status scic_sds_remote_device_general_frame_handler(
629 struct scic_sds_remote_device *sci_dev,
630 u32 frame_index)
632 enum sci_status result;
633 struct sci_ssp_frame_header *frame_header;
634 struct scic_sds_request *io_request;
636 result = scic_sds_unsolicited_frame_control_get_header(
637 &(scic_sds_remote_device_get_controller(sci_dev)->uf_control),
638 frame_index,
639 (void **)&frame_header
642 if (SCI_SUCCESS == result) {
643 io_request = scic_sds_controller_get_io_request_from_tag(
644 scic_sds_remote_device_get_controller(sci_dev), frame_header->tag);
646 if ((io_request == NULL)
647 || (io_request->target_device != sci_dev)) {
649 * We could not map this tag to a valid IO request
650 * Just toss the frame and continue */
651 scic_sds_controller_release_frame(
652 scic_sds_remote_device_get_controller(sci_dev), frame_index
654 } else {
655 /* The IO request is now in charge of releasing the frame */
656 result = io_request->state_handlers->frame_handler(
657 io_request, frame_index);
661 return result;
666 * @[in]: sci_dev This is the device object that is receiving the event.
667 * @[in]: event_code The event code to process.
669 * This is a common method for handling events reported to the remote device
670 * from the controller object. enum sci_status
672 enum sci_status scic_sds_remote_device_general_event_handler(
673 struct scic_sds_remote_device *sci_dev,
674 u32 event_code)
676 return scic_sds_remote_device_core_event_handler(sci_dev,
677 event_code,
678 true);
682 * *****************************************************************************
683 * * STOPPED STATE HANDLERS
684 * ***************************************************************************** */
688 * @device:
690 * This method takes the struct scic_sds_remote_device from a stopped state and
691 * attempts to start it. The RNC buffer for the device is constructed and the
692 * device state machine is transitioned to the
693 * SCIC_BASE_REMOTE_DEVICE_STATE_STARTING. enum sci_status SCI_SUCCESS if there is
694 * an RNC buffer available to construct the remote device.
695 * SCI_FAILURE_INSUFFICIENT_RESOURCES if there is no RNC buffer available in
696 * which to construct the remote device.
698 static enum sci_status scic_sds_remote_device_stopped_state_start_handler(
699 struct scic_sds_remote_device *sci_dev)
701 enum sci_status status;
703 status = scic_sds_remote_node_context_resume(&sci_dev->rnc,
704 scic_sds_remote_device_resume_complete_handler, sci_dev);
706 if (status == SCI_SUCCESS)
707 sci_base_state_machine_change_state(&sci_dev->state_machine,
708 SCI_BASE_REMOTE_DEVICE_STATE_STARTING);
710 return status;
713 static enum sci_status scic_sds_remote_device_stopped_state_stop_handler(
714 struct scic_sds_remote_device *sci_dev)
716 return SCI_SUCCESS;
721 * @sci_dev: The struct scic_sds_remote_device which is cast into a
722 * struct scic_sds_remote_device.
724 * This method will destruct a struct scic_sds_remote_device that is in a stopped
725 * state. This is the only state from which a destruct request will succeed.
726 * The RNi for this struct scic_sds_remote_device is returned to the free pool and the
727 * device object transitions to the SCI_BASE_REMOTE_DEVICE_STATE_FINAL.
728 * enum sci_status SCI_SUCCESS
730 static enum sci_status scic_sds_remote_device_stopped_state_destruct_handler(
731 struct scic_sds_remote_device *sci_dev)
733 struct scic_sds_controller *scic;
735 scic = scic_sds_remote_device_get_controller(sci_dev);
736 scic_sds_controller_free_remote_node_context(scic, sci_dev,
737 sci_dev->rnc.remote_node_index);
738 sci_dev->rnc.remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX;
740 sci_base_state_machine_change_state(&sci_dev->state_machine,
741 SCI_BASE_REMOTE_DEVICE_STATE_FINAL);
743 return SCI_SUCCESS;
747 * *****************************************************************************
748 * * STARTING STATE HANDLERS
749 * ***************************************************************************** */
751 static enum sci_status scic_sds_remote_device_starting_state_stop_handler(
752 struct scic_sds_remote_device *sci_dev)
755 * This device has not yet started so there had better be no IO requests
757 BUG_ON(sci_dev->started_request_count != 0);
760 * Destroy the remote node context
762 scic_sds_remote_node_context_destruct(&sci_dev->rnc,
763 scic_sds_cb_remote_device_rnc_destruct_complete, sci_dev);
766 * Transition to the stopping state and wait for the remote node to
767 * complete being posted and invalidated.
769 sci_base_state_machine_change_state(&sci_dev->state_machine,
770 SCI_BASE_REMOTE_DEVICE_STATE_STOPPING);
772 return SCI_SUCCESS;
775 enum sci_status scic_sds_remote_device_ready_state_stop_handler(
776 struct scic_sds_remote_device *sci_dev)
778 enum sci_status status = SCI_SUCCESS;
780 /* Request the parent state machine to transition to the stopping state */
781 sci_base_state_machine_change_state(&sci_dev->state_machine,
782 SCI_BASE_REMOTE_DEVICE_STATE_STOPPING);
784 if (sci_dev->started_request_count == 0) {
785 scic_sds_remote_node_context_destruct(&sci_dev->rnc,
786 scic_sds_cb_remote_device_rnc_destruct_complete,
787 sci_dev);
788 } else
789 status = scic_sds_remote_device_terminate_requests(sci_dev);
791 return status;
796 * @device: The struct scic_sds_remote_device object which is cast to a
797 * struct scic_sds_remote_device object.
799 * This is the ready state device reset handler enum sci_status
801 enum sci_status scic_sds_remote_device_ready_state_reset_handler(
802 struct scic_sds_remote_device *sci_dev)
804 /* Request the parent state machine to transition to the stopping state */
805 sci_base_state_machine_change_state(&sci_dev->state_machine,
806 SCI_BASE_REMOTE_DEVICE_STATE_RESETTING);
808 return SCI_SUCCESS;
812 * This method will attempt to start a task request for this device object. The
813 * remote device object will issue the start request for the task and if
814 * successful it will start the request for the port object then increment its
815 * own requet count. enum sci_status SCI_SUCCESS if the task request is started for
816 * this device object. SCI_FAILURE_INSUFFICIENT_RESOURCES if the io request
817 * object could not get the resources to start.
819 static enum sci_status scic_sds_remote_device_ready_state_start_task_handler(
820 struct scic_sds_remote_device *sci_dev,
821 struct scic_sds_request *request)
823 enum sci_status result;
825 /* See if the port is in a state where we can start the IO request */
826 result = scic_sds_port_start_io(
827 scic_sds_remote_device_get_port(sci_dev), sci_dev, request);
829 if (result == SCI_SUCCESS) {
830 result = scic_sds_remote_node_context_start_task(&sci_dev->rnc,
831 request);
832 if (result == SCI_SUCCESS)
833 result = scic_sds_request_start(request);
835 scic_sds_remote_device_start_request(sci_dev, request, result);
838 return result;
842 * This method will attempt to start an io request for this device object. The
843 * remote device object will issue the start request for the io and if
844 * successful it will start the request for the port object then increment its
845 * own requet count. enum sci_status SCI_SUCCESS if the io request is started for
846 * this device object. SCI_FAILURE_INSUFFICIENT_RESOURCES if the io request
847 * object could not get the resources to start.
849 static enum sci_status scic_sds_remote_device_ready_state_start_io_handler(
850 struct scic_sds_remote_device *sci_dev,
851 struct scic_sds_request *request)
853 enum sci_status result;
855 /* See if the port is in a state where we can start the IO request */
856 result = scic_sds_port_start_io(
857 scic_sds_remote_device_get_port(sci_dev), sci_dev, request);
859 if (result == SCI_SUCCESS) {
860 result = scic_sds_remote_node_context_start_io(&sci_dev->rnc, request);
861 if (result == SCI_SUCCESS)
862 result = scic_sds_request_start(request);
864 scic_sds_remote_device_start_request(sci_dev, request, result);
867 return result;
871 * This method will complete the request for the remote device object. The
872 * method will call the completion handler for the request object and if
873 * successful it will complete the request on the port object then decrement
874 * its own started_request_count. enum sci_status
876 static enum sci_status scic_sds_remote_device_ready_state_complete_request_handler(
877 struct scic_sds_remote_device *sci_dev,
878 struct scic_sds_request *request)
880 enum sci_status result;
882 result = scic_sds_request_complete(request);
884 if (result != SCI_SUCCESS)
885 return result;
887 /* See if the port is in a state
888 * where we can start the IO request */
889 result = scic_sds_port_complete_io(
890 scic_sds_remote_device_get_port(sci_dev),
891 sci_dev, request);
893 if (result == SCI_SUCCESS)
894 scic_sds_remote_device_decrement_request_count(sci_dev);
896 return result;
900 * *****************************************************************************
901 * * STOPPING STATE HANDLERS
902 * ***************************************************************************** */
906 * @sci_dev: The struct scic_sds_remote_device which is cast into a
907 * struct scic_sds_remote_device.
909 * This method will stop a struct scic_sds_remote_device that is already in the
910 * SCI_BASE_REMOTE_DEVICE_STATE_STOPPING state. This is not considered an error
911 * since we allow a stop request on a device that is alreay stopping or
912 * stopped. enum sci_status SCI_SUCCESS
914 static enum sci_status scic_sds_remote_device_stopping_state_stop_handler(
915 struct scic_sds_remote_device *device)
918 * All requests should have been terminated, but if there is an
919 * attempt to stop a device already in the stopping state, then
920 * try again to terminate. */
921 return scic_sds_remote_device_terminate_requests(device);
927 * @device: The device object for which the request is completing.
928 * @request: The task request that is being completed.
930 * This method completes requests for this struct scic_sds_remote_device while it is
931 * in the SCI_BASE_REMOTE_DEVICE_STATE_STOPPING state. This method calls the
932 * complete method for the request object and if that is successful the port
933 * object is called to complete the task request. Then the device object itself
934 * completes the task request. If struct scic_sds_remote_device started_request_count
935 * goes to 0 and the invalidate RNC request has completed the device object can
936 * transition to the SCI_BASE_REMOTE_DEVICE_STATE_STOPPED. enum sci_status
938 static enum sci_status scic_sds_remote_device_stopping_state_complete_request_handler(
939 struct scic_sds_remote_device *sci_dev,
940 struct scic_sds_request *request)
942 enum sci_status status = SCI_SUCCESS;
944 status = scic_sds_request_complete(request);
946 if (status != SCI_SUCCESS)
947 return status;
949 status = scic_sds_port_complete_io(scic_sds_remote_device_get_port(sci_dev),
950 sci_dev, request);
951 if (status != SCI_SUCCESS)
952 return status;
954 scic_sds_remote_device_decrement_request_count(sci_dev);
956 if (scic_sds_remote_device_get_request_count(sci_dev) == 0)
957 scic_sds_remote_node_context_destruct(&sci_dev->rnc,
958 scic_sds_cb_remote_device_rnc_destruct_complete,
959 sci_dev);
960 return SCI_SUCCESS;
965 * @device: The struct scic_sds_remote_device which is to be cast into a
966 * struct scic_sds_remote_device object.
968 * This method will complete the reset operation when the device is in the
969 * resetting state. enum sci_status
971 static enum sci_status scic_sds_remote_device_resetting_state_reset_complete_handler(
972 struct scic_sds_remote_device *sci_dev)
975 sci_base_state_machine_change_state(
976 &sci_dev->state_machine,
977 SCI_BASE_REMOTE_DEVICE_STATE_READY
980 return SCI_SUCCESS;
985 * @device: The struct scic_sds_remote_device which is to be cast into a
986 * struct scic_sds_remote_device object.
988 * This method will stop the remote device while in the resetting state.
989 * enum sci_status
991 static enum sci_status scic_sds_remote_device_resetting_state_stop_handler(
992 struct scic_sds_remote_device *sci_dev)
994 sci_base_state_machine_change_state(
995 &sci_dev->state_machine,
996 SCI_BASE_REMOTE_DEVICE_STATE_STOPPING
999 return SCI_SUCCESS;
1003 * This method completes requests for this struct scic_sds_remote_device while it is
1004 * in the SCI_BASE_REMOTE_DEVICE_STATE_RESETTING state. This method calls the
1005 * complete method for the request object and if that is successful the port
1006 * object is called to complete the task request. Then the device object itself
1007 * completes the task request. enum sci_status
1009 static enum sci_status scic_sds_remote_device_resetting_state_complete_request_handler(
1010 struct scic_sds_remote_device *sci_dev,
1011 struct scic_sds_request *request)
1013 enum sci_status status = SCI_SUCCESS;
1015 status = scic_sds_request_complete(request);
1017 if (status == SCI_SUCCESS) {
1018 status = scic_sds_port_complete_io(
1019 scic_sds_remote_device_get_port(sci_dev),
1020 sci_dev, request);
1022 if (status == SCI_SUCCESS) {
1023 scic_sds_remote_device_decrement_request_count(sci_dev);
1027 return status;
1030 static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_state_handler_table[] = {
1031 [SCI_BASE_REMOTE_DEVICE_STATE_INITIAL] = {
1032 .start_handler = scic_sds_remote_device_default_start_handler,
1033 .stop_handler = scic_sds_remote_device_default_stop_handler,
1034 .fail_handler = scic_sds_remote_device_default_fail_handler,
1035 .destruct_handler = scic_sds_remote_device_default_destruct_handler,
1036 .reset_handler = scic_sds_remote_device_default_reset_handler,
1037 .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
1038 .start_io_handler = scic_sds_remote_device_default_start_request_handler,
1039 .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
1040 .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
1041 .start_task_handler = scic_sds_remote_device_default_start_request_handler,
1042 .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
1043 .suspend_handler = scic_sds_remote_device_default_suspend_handler,
1044 .resume_handler = scic_sds_remote_device_default_resume_handler,
1045 .event_handler = scic_sds_remote_device_default_event_handler,
1046 .frame_handler = scic_sds_remote_device_default_frame_handler
1048 [SCI_BASE_REMOTE_DEVICE_STATE_STOPPED] = {
1049 .start_handler = scic_sds_remote_device_stopped_state_start_handler,
1050 .stop_handler = scic_sds_remote_device_stopped_state_stop_handler,
1051 .fail_handler = scic_sds_remote_device_default_fail_handler,
1052 .destruct_handler = scic_sds_remote_device_stopped_state_destruct_handler,
1053 .reset_handler = scic_sds_remote_device_default_reset_handler,
1054 .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
1055 .start_io_handler = scic_sds_remote_device_default_start_request_handler,
1056 .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
1057 .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
1058 .start_task_handler = scic_sds_remote_device_default_start_request_handler,
1059 .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
1060 .suspend_handler = scic_sds_remote_device_default_suspend_handler,
1061 .resume_handler = scic_sds_remote_device_default_resume_handler,
1062 .event_handler = scic_sds_remote_device_default_event_handler,
1063 .frame_handler = scic_sds_remote_device_default_frame_handler
1065 [SCI_BASE_REMOTE_DEVICE_STATE_STARTING] = {
1066 .start_handler = scic_sds_remote_device_default_start_handler,
1067 .stop_handler = scic_sds_remote_device_starting_state_stop_handler,
1068 .fail_handler = scic_sds_remote_device_default_fail_handler,
1069 .destruct_handler = scic_sds_remote_device_default_destruct_handler,
1070 .reset_handler = scic_sds_remote_device_default_reset_handler,
1071 .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
1072 .start_io_handler = scic_sds_remote_device_default_start_request_handler,
1073 .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
1074 .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
1075 .start_task_handler = scic_sds_remote_device_default_start_request_handler,
1076 .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
1077 .suspend_handler = scic_sds_remote_device_default_suspend_handler,
1078 .resume_handler = scic_sds_remote_device_default_resume_handler,
1079 .event_handler = scic_sds_remote_device_general_event_handler,
1080 .frame_handler = scic_sds_remote_device_default_frame_handler
1082 [SCI_BASE_REMOTE_DEVICE_STATE_READY] = {
1083 .start_handler = scic_sds_remote_device_default_start_handler,
1084 .stop_handler = scic_sds_remote_device_ready_state_stop_handler,
1085 .fail_handler = scic_sds_remote_device_default_fail_handler,
1086 .destruct_handler = scic_sds_remote_device_default_destruct_handler,
1087 .reset_handler = scic_sds_remote_device_ready_state_reset_handler,
1088 .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
1089 .start_io_handler = scic_sds_remote_device_ready_state_start_io_handler,
1090 .complete_io_handler = scic_sds_remote_device_ready_state_complete_request_handler,
1091 .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
1092 .start_task_handler = scic_sds_remote_device_ready_state_start_task_handler,
1093 .complete_task_handler = scic_sds_remote_device_ready_state_complete_request_handler,
1094 .suspend_handler = scic_sds_remote_device_default_suspend_handler,
1095 .resume_handler = scic_sds_remote_device_default_resume_handler,
1096 .event_handler = scic_sds_remote_device_general_event_handler,
1097 .frame_handler = scic_sds_remote_device_general_frame_handler,
1099 [SCI_BASE_REMOTE_DEVICE_STATE_STOPPING] = {
1100 .start_handler = scic_sds_remote_device_default_start_handler,
1101 .stop_handler = scic_sds_remote_device_stopping_state_stop_handler,
1102 .fail_handler = scic_sds_remote_device_default_fail_handler,
1103 .destruct_handler = scic_sds_remote_device_default_destruct_handler,
1104 .reset_handler = scic_sds_remote_device_default_reset_handler,
1105 .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
1106 .start_io_handler = scic_sds_remote_device_default_start_request_handler,
1107 .complete_io_handler = scic_sds_remote_device_stopping_state_complete_request_handler,
1108 .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
1109 .start_task_handler = scic_sds_remote_device_default_start_request_handler,
1110 .complete_task_handler = scic_sds_remote_device_stopping_state_complete_request_handler,
1111 .suspend_handler = scic_sds_remote_device_default_suspend_handler,
1112 .resume_handler = scic_sds_remote_device_default_resume_handler,
1113 .event_handler = scic_sds_remote_device_general_event_handler,
1114 .frame_handler = scic_sds_remote_device_general_frame_handler
1116 [SCI_BASE_REMOTE_DEVICE_STATE_FAILED] = {
1117 .start_handler = scic_sds_remote_device_default_start_handler,
1118 .stop_handler = scic_sds_remote_device_default_stop_handler,
1119 .fail_handler = scic_sds_remote_device_default_fail_handler,
1120 .destruct_handler = scic_sds_remote_device_default_destruct_handler,
1121 .reset_handler = scic_sds_remote_device_default_reset_handler,
1122 .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
1123 .start_io_handler = scic_sds_remote_device_default_start_request_handler,
1124 .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
1125 .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
1126 .start_task_handler = scic_sds_remote_device_default_start_request_handler,
1127 .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
1128 .suspend_handler = scic_sds_remote_device_default_suspend_handler,
1129 .resume_handler = scic_sds_remote_device_default_resume_handler,
1130 .event_handler = scic_sds_remote_device_default_event_handler,
1131 .frame_handler = scic_sds_remote_device_general_frame_handler
1133 [SCI_BASE_REMOTE_DEVICE_STATE_RESETTING] = {
1134 .start_handler = scic_sds_remote_device_default_start_handler,
1135 .stop_handler = scic_sds_remote_device_resetting_state_stop_handler,
1136 .fail_handler = scic_sds_remote_device_default_fail_handler,
1137 .destruct_handler = scic_sds_remote_device_default_destruct_handler,
1138 .reset_handler = scic_sds_remote_device_default_reset_handler,
1139 .reset_complete_handler = scic_sds_remote_device_resetting_state_reset_complete_handler,
1140 .start_io_handler = scic_sds_remote_device_default_start_request_handler,
1141 .complete_io_handler = scic_sds_remote_device_resetting_state_complete_request_handler,
1142 .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
1143 .start_task_handler = scic_sds_remote_device_default_start_request_handler,
1144 .complete_task_handler = scic_sds_remote_device_resetting_state_complete_request_handler,
1145 .suspend_handler = scic_sds_remote_device_default_suspend_handler,
1146 .resume_handler = scic_sds_remote_device_default_resume_handler,
1147 .event_handler = scic_sds_remote_device_default_event_handler,
1148 .frame_handler = scic_sds_remote_device_general_frame_handler
1150 [SCI_BASE_REMOTE_DEVICE_STATE_FINAL] = {
1151 .start_handler = scic_sds_remote_device_default_start_handler,
1152 .stop_handler = scic_sds_remote_device_default_stop_handler,
1153 .fail_handler = scic_sds_remote_device_default_fail_handler,
1154 .destruct_handler = scic_sds_remote_device_default_destruct_handler,
1155 .reset_handler = scic_sds_remote_device_default_reset_handler,
1156 .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
1157 .start_io_handler = scic_sds_remote_device_default_start_request_handler,
1158 .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
1159 .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
1160 .start_task_handler = scic_sds_remote_device_default_start_request_handler,
1161 .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
1162 .suspend_handler = scic_sds_remote_device_default_suspend_handler,
1163 .resume_handler = scic_sds_remote_device_default_resume_handler,
1164 .event_handler = scic_sds_remote_device_default_event_handler,
1165 .frame_handler = scic_sds_remote_device_default_frame_handler
1169 static void scic_sds_remote_device_initial_state_enter(
1170 struct sci_base_object *object)
1172 struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
1174 sci_dev = container_of(object, typeof(*sci_dev), parent);
1175 SET_STATE_HANDLER(sci_dev, scic_sds_remote_device_state_handler_table,
1176 SCI_BASE_REMOTE_DEVICE_STATE_INITIAL);
1178 /* Initial state is a transitional state to the stopped state */
1179 sci_base_state_machine_change_state(&sci_dev->state_machine,
1180 SCI_BASE_REMOTE_DEVICE_STATE_STOPPED);
1184 * isci_remote_device_change_state() - This function gets the status of the
1185 * remote_device object.
1186 * @isci_device: This parameter points to the isci_remote_device object
1188 * status of the object as a isci_status enum.
1190 void isci_remote_device_change_state(
1191 struct isci_remote_device *isci_device,
1192 enum isci_status status)
1194 unsigned long flags;
1196 spin_lock_irqsave(&isci_device->state_lock, flags);
1197 isci_device->status = status;
1198 spin_unlock_irqrestore(&isci_device->state_lock, flags);
1202 * scic_remote_device_destruct() - free remote node context and destruct
1203 * @remote_device: This parameter specifies the remote device to be destructed.
1205 * Remote device objects are a limited resource. As such, they must be
1206 * protected. Thus calls to construct and destruct are mutually exclusive and
1207 * non-reentrant. The return value shall indicate if the device was
1208 * successfully destructed or if some failure occurred. enum sci_status This value
1209 * is returned if the device is successfully destructed.
1210 * SCI_FAILURE_INVALID_REMOTE_DEVICE This value is returned if the supplied
1211 * device isn't valid (e.g. it's already been destoryed, the handle isn't
1212 * valid, etc.).
1214 static enum sci_status scic_remote_device_destruct(struct scic_sds_remote_device *sci_dev)
1216 return sci_dev->state_handlers->destruct_handler(sci_dev);
1220 * isci_remote_device_deconstruct() - This function frees an isci_remote_device.
1221 * @ihost: This parameter specifies the isci host object.
1222 * @idev: This parameter specifies the remote device to be freed.
1225 static void isci_remote_device_deconstruct(struct isci_host *ihost, struct isci_remote_device *idev)
1227 dev_dbg(&ihost->pdev->dev,
1228 "%s: isci_device = %p\n", __func__, idev);
1230 /* There should not be any outstanding io's. All paths to
1231 * here should go through isci_remote_device_nuke_requests.
1232 * If we hit this condition, we will need a way to complete
1233 * io requests in process */
1234 while (!list_empty(&idev->reqs_in_process)) {
1236 dev_err(&ihost->pdev->dev,
1237 "%s: ** request list not empty! **\n", __func__);
1238 BUG();
1241 scic_remote_device_destruct(&idev->sci);
1242 idev->domain_dev->lldd_dev = NULL;
1243 idev->domain_dev = NULL;
1244 idev->isci_port = NULL;
1245 list_del_init(&idev->node);
1247 clear_bit(IDEV_START_PENDING, &idev->flags);
1248 clear_bit(IDEV_STOP_PENDING, &idev->flags);
1249 wake_up(&ihost->eventq);
1253 * isci_remote_device_stop_complete() - This function is called by the scic
1254 * when the remote device stop has completed. We mark the isci device as not
1255 * ready and remove the isci remote device.
1256 * @ihost: This parameter specifies the isci host object.
1257 * @idev: This parameter specifies the remote device.
1258 * @status: This parameter specifies status of the completion.
1261 static void isci_remote_device_stop_complete(struct isci_host *ihost,
1262 struct isci_remote_device *idev)
1264 dev_dbg(&ihost->pdev->dev, "%s: complete idev = %p\n", __func__, idev);
1266 isci_remote_device_change_state(idev, isci_stopped);
1268 /* after stop, we can tear down resources. */
1269 isci_remote_device_deconstruct(ihost, idev);
1272 static void scic_sds_remote_device_stopped_state_enter(
1273 struct sci_base_object *object)
1275 struct scic_sds_remote_device *sci_dev;
1276 struct scic_sds_controller *scic;
1277 struct isci_remote_device *idev;
1278 struct isci_host *ihost;
1279 u32 prev_state;
1281 sci_dev = container_of(object, typeof(*sci_dev), parent);
1282 scic = scic_sds_remote_device_get_controller(sci_dev);
1283 ihost = sci_object_get_association(scic);
1284 idev = sci_object_get_association(sci_dev);
1286 SET_STATE_HANDLER(sci_dev, scic_sds_remote_device_state_handler_table,
1287 SCI_BASE_REMOTE_DEVICE_STATE_STOPPED);
1289 /* If we are entering from the stopping state let the SCI User know that
1290 * the stop operation has completed.
1292 prev_state = sci_dev->state_machine.previous_state_id;
1293 if (prev_state == SCI_BASE_REMOTE_DEVICE_STATE_STOPPING)
1294 isci_remote_device_stop_complete(ihost, idev);
1296 scic_sds_controller_remote_device_stopped(scic, sci_dev);
1299 static void scic_sds_remote_device_starting_state_enter(struct sci_base_object *object)
1301 struct scic_sds_remote_device *sci_dev = container_of(object, typeof(*sci_dev),
1302 parent);
1303 struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
1304 struct isci_host *ihost = sci_object_get_association(scic);
1305 struct isci_remote_device *idev = sci_object_get_association(sci_dev);
1307 SET_STATE_HANDLER(sci_dev, scic_sds_remote_device_state_handler_table,
1308 SCI_BASE_REMOTE_DEVICE_STATE_STARTING);
1310 isci_remote_device_not_ready(ihost, idev,
1311 SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED);
1314 static void scic_sds_remote_device_ready_state_enter(struct sci_base_object *object)
1316 struct scic_sds_remote_device *sci_dev = container_of(object, typeof(*sci_dev),
1317 parent);
1318 struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
1319 struct isci_host *ihost = sci_object_get_association(scic);
1320 struct isci_remote_device *idev = sci_object_get_association(sci_dev);
1322 SET_STATE_HANDLER(sci_dev,
1323 scic_sds_remote_device_state_handler_table,
1324 SCI_BASE_REMOTE_DEVICE_STATE_READY);
1326 scic->remote_device_sequence[sci_dev->rnc.remote_node_index]++;
1328 if (sci_dev->has_ready_substate_machine)
1329 sci_base_state_machine_start(&sci_dev->ready_substate_machine);
1330 else
1331 isci_remote_device_ready(ihost, idev);
1334 static void scic_sds_remote_device_ready_state_exit(
1335 struct sci_base_object *object)
1337 struct scic_sds_remote_device *sci_dev = container_of(object, typeof(*sci_dev),
1338 parent);
1339 if (sci_dev->has_ready_substate_machine)
1340 sci_base_state_machine_stop(&sci_dev->ready_substate_machine);
1341 else {
1342 struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
1343 struct isci_host *ihost = sci_object_get_association(scic);
1344 struct isci_remote_device *idev = sci_object_get_association(sci_dev);
1346 isci_remote_device_not_ready(ihost, idev,
1347 SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED);
1351 static void scic_sds_remote_device_stopping_state_enter(
1352 struct sci_base_object *object)
1354 struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
1356 SET_STATE_HANDLER(
1357 sci_dev,
1358 scic_sds_remote_device_state_handler_table,
1359 SCI_BASE_REMOTE_DEVICE_STATE_STOPPING
1363 static void scic_sds_remote_device_failed_state_enter(
1364 struct sci_base_object *object)
1366 struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
1368 SET_STATE_HANDLER(
1369 sci_dev,
1370 scic_sds_remote_device_state_handler_table,
1371 SCI_BASE_REMOTE_DEVICE_STATE_FAILED
1375 static void scic_sds_remote_device_resetting_state_enter(
1376 struct sci_base_object *object)
1378 struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
1380 SET_STATE_HANDLER(
1381 sci_dev,
1382 scic_sds_remote_device_state_handler_table,
1383 SCI_BASE_REMOTE_DEVICE_STATE_RESETTING
1386 scic_sds_remote_node_context_suspend(
1387 &sci_dev->rnc, SCI_SOFTWARE_SUSPENSION, NULL, NULL);
1390 static void scic_sds_remote_device_resetting_state_exit(
1391 struct sci_base_object *object)
1393 struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
1395 scic_sds_remote_node_context_resume(&sci_dev->rnc, NULL, NULL);
1398 static void scic_sds_remote_device_final_state_enter(
1399 struct sci_base_object *object)
1401 struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
1403 SET_STATE_HANDLER(
1404 sci_dev,
1405 scic_sds_remote_device_state_handler_table,
1406 SCI_BASE_REMOTE_DEVICE_STATE_FINAL
1411 static const struct sci_base_state scic_sds_remote_device_state_table[] = {
1412 [SCI_BASE_REMOTE_DEVICE_STATE_INITIAL] = {
1413 .enter_state = scic_sds_remote_device_initial_state_enter,
1415 [SCI_BASE_REMOTE_DEVICE_STATE_STOPPED] = {
1416 .enter_state = scic_sds_remote_device_stopped_state_enter,
1418 [SCI_BASE_REMOTE_DEVICE_STATE_STARTING] = {
1419 .enter_state = scic_sds_remote_device_starting_state_enter,
1421 [SCI_BASE_REMOTE_DEVICE_STATE_READY] = {
1422 .enter_state = scic_sds_remote_device_ready_state_enter,
1423 .exit_state = scic_sds_remote_device_ready_state_exit
1425 [SCI_BASE_REMOTE_DEVICE_STATE_STOPPING] = {
1426 .enter_state = scic_sds_remote_device_stopping_state_enter,
1428 [SCI_BASE_REMOTE_DEVICE_STATE_FAILED] = {
1429 .enter_state = scic_sds_remote_device_failed_state_enter,
1431 [SCI_BASE_REMOTE_DEVICE_STATE_RESETTING] = {
1432 .enter_state = scic_sds_remote_device_resetting_state_enter,
1433 .exit_state = scic_sds_remote_device_resetting_state_exit
1435 [SCI_BASE_REMOTE_DEVICE_STATE_FINAL] = {
1436 .enter_state = scic_sds_remote_device_final_state_enter,
1441 * scic_remote_device_construct() - common construction
1442 * @sci_port: SAS/SATA port through which this device is accessed.
1443 * @sci_dev: remote device to construct
1445 * This routine just performs benign initialization and does not
1446 * allocate the remote_node_context which is left to
1447 * scic_remote_device_[de]a_construct(). scic_remote_device_destruct()
1448 * frees the remote_node_context(s) for the device.
1450 static void scic_remote_device_construct(struct scic_sds_port *sci_port,
1451 struct scic_sds_remote_device *sci_dev)
1453 sci_dev->owning_port = sci_port;
1454 sci_dev->started_request_count = 0;
1455 sci_dev->parent.private = NULL;
1457 sci_base_state_machine_construct(
1458 &sci_dev->state_machine,
1459 &sci_dev->parent,
1460 scic_sds_remote_device_state_table,
1461 SCI_BASE_REMOTE_DEVICE_STATE_INITIAL
1464 sci_base_state_machine_start(
1465 &sci_dev->state_machine
1468 scic_sds_remote_node_context_construct(&sci_dev->rnc,
1469 SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX);
1471 sci_object_set_association(&sci_dev->rnc, sci_dev);
1475 * scic_remote_device_da_construct() - construct direct attached device.
1477 * The information (e.g. IAF, Signature FIS, etc.) necessary to build
1478 * the device is known to the SCI Core since it is contained in the
1479 * scic_phy object. Remote node context(s) is/are a global resource
1480 * allocated by this routine, freed by scic_remote_device_destruct().
1482 * Returns:
1483 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1484 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1485 * sata-only controller instance.
1486 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
1488 static enum sci_status scic_remote_device_da_construct(struct scic_sds_port *sci_port,
1489 struct scic_sds_remote_device *sci_dev)
1491 enum sci_status status;
1492 u16 remote_node_index;
1493 struct sci_sas_identify_address_frame_protocols protocols;
1495 scic_remote_device_construct(sci_port, sci_dev);
1498 * This information is request to determine how many remote node context
1499 * entries will be needed to store the remote node.
1501 scic_sds_port_get_attached_protocols(sci_dev->owning_port, &protocols);
1502 sci_dev->target_protocols.u.all = protocols.u.all;
1503 sci_dev->is_direct_attached = true;
1504 #if !defined(DISABLE_ATAPI)
1505 sci_dev->is_atapi = scic_sds_remote_device_is_atapi(sci_dev);
1506 #endif
1508 status = scic_sds_controller_allocate_remote_node_context(
1509 sci_dev->owning_port->owning_controller,
1510 sci_dev,
1511 &remote_node_index);
1513 if (status == SCI_SUCCESS) {
1514 sci_dev->rnc.remote_node_index = remote_node_index;
1516 scic_sds_port_get_attached_sas_address(
1517 sci_dev->owning_port, &sci_dev->device_address);
1519 if (sci_dev->target_protocols.u.bits.attached_ssp_target) {
1520 sci_dev->has_ready_substate_machine = false;
1521 } else if (sci_dev->target_protocols.u.bits.attached_stp_target) {
1522 sci_dev->has_ready_substate_machine = true;
1524 sci_base_state_machine_construct(
1525 &sci_dev->ready_substate_machine,
1526 &sci_dev->parent,
1527 scic_sds_stp_remote_device_ready_substate_table,
1528 SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE);
1529 } else if (sci_dev->target_protocols.u.bits.attached_smp_target) {
1530 sci_dev->has_ready_substate_machine = true;
1532 /* add the SMP ready substate machine construction here */
1533 sci_base_state_machine_construct(
1534 &sci_dev->ready_substate_machine,
1535 &sci_dev->parent,
1536 scic_sds_smp_remote_device_ready_substate_table,
1537 SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE);
1540 sci_dev->connection_rate = scic_sds_port_get_max_allowed_speed(
1541 sci_dev->owning_port);
1543 /* / @todo Should I assign the port width by reading all of the phys on the port? */
1544 sci_dev->device_port_width = 1;
1547 return status;
1550 static void scic_sds_remote_device_get_info_from_smp_discover_response(
1551 struct scic_sds_remote_device *sci_dev,
1552 struct smp_response_discover *discover_response)
1554 /* decode discover_response to set sas_address to sci_dev. */
1555 sci_dev->device_address.high =
1556 discover_response->attached_sas_address.high;
1558 sci_dev->device_address.low =
1559 discover_response->attached_sas_address.low;
1561 sci_dev->target_protocols.u.all = discover_response->protocols.u.all;
1565 * scic_remote_device_ea_construct() - construct expander attached device
1566 * @discover_response: data to build remote device
1568 * Remote node context(s) is/are a global resource allocated by this
1569 * routine, freed by scic_remote_device_destruct().
1571 * Returns:
1572 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1573 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1574 * sata-only controller instance.
1575 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
1577 static enum sci_status scic_remote_device_ea_construct(struct scic_sds_port *sci_port,
1578 struct scic_sds_remote_device *sci_dev,
1579 struct smp_response_discover *discover_response)
1581 struct scic_sds_controller *scic = sci_port->owning_controller;
1582 enum sci_status status;
1584 scic_remote_device_construct(sci_port, sci_dev);
1586 scic_sds_remote_device_get_info_from_smp_discover_response(
1587 sci_dev, discover_response);
1589 status = scic_sds_controller_allocate_remote_node_context(
1590 scic, sci_dev, &sci_dev->rnc.remote_node_index);
1592 if (status == SCI_SUCCESS) {
1593 if (sci_dev->target_protocols.u.bits.attached_ssp_target) {
1594 sci_dev->has_ready_substate_machine = false;
1595 } else if (sci_dev->target_protocols.u.bits.attached_smp_target) {
1596 sci_dev->has_ready_substate_machine = true;
1598 /* add the SMP ready substate machine construction here */
1599 sci_base_state_machine_construct(
1600 &sci_dev->ready_substate_machine,
1601 &sci_dev->parent,
1602 scic_sds_smp_remote_device_ready_substate_table,
1603 SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE);
1604 } else if (sci_dev->target_protocols.u.bits.attached_stp_target) {
1605 sci_dev->has_ready_substate_machine = true;
1607 sci_base_state_machine_construct(
1608 &sci_dev->ready_substate_machine,
1609 &sci_dev->parent,
1610 scic_sds_stp_remote_device_ready_substate_table,
1611 SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE);
1615 * For SAS-2 the physical link rate is actually a logical link
1616 * rate that incorporates multiplexing. The SCU doesn't
1617 * incorporate multiplexing and for the purposes of the
1618 * connection the logical link rate is that same as the
1619 * physical. Furthermore, the SAS-2 and SAS-1.1 fields overlay
1620 * one another, so this code works for both situations. */
1621 sci_dev->connection_rate = min_t(u16,
1622 scic_sds_port_get_max_allowed_speed(sci_port),
1623 discover_response->u2.sas1_1.negotiated_physical_link_rate);
1625 /* / @todo Should I assign the port width by reading all of the phys on the port? */
1626 sci_dev->device_port_width = 1;
1629 return status;
1633 * scic_remote_device_start() - This method will start the supplied remote
1634 * device. This method enables normal IO requests to flow through to the
1635 * remote device.
1636 * @remote_device: This parameter specifies the device to be started.
1637 * @timeout: This parameter specifies the number of milliseconds in which the
1638 * start operation should complete.
1640 * An indication of whether the device was successfully started. SCI_SUCCESS
1641 * This value is returned if the device was successfully started.
1642 * SCI_FAILURE_INVALID_PHY This value is returned if the user attempts to start
1643 * the device when there have been no phys added to it.
1645 static enum sci_status scic_remote_device_start(struct scic_sds_remote_device *sci_dev,
1646 u32 timeout)
1648 return sci_dev->state_handlers->start_handler(sci_dev);
1652 * isci_remote_device_construct() - This function calls the scic remote device
1653 * construct and start functions, it waits on the remote device start
1654 * completion.
1655 * @port: This parameter specifies the isci port with the remote device.
1656 * @isci_device: This parameter specifies the isci remote device
1658 * status from the scic calls, the caller to this function should clean up
1659 * resources as appropriate.
1661 static enum sci_status isci_remote_device_construct(
1662 struct isci_port *port,
1663 struct isci_remote_device *isci_device)
1665 enum sci_status status = SCI_SUCCESS;
1667 if (isci_device->domain_dev->parent &&
1668 (isci_device->domain_dev->parent->dev_type == EDGE_DEV)) {
1669 int i;
1671 /* struct smp_response_discover discover_response; */
1672 struct discover_resp discover_response;
1673 struct domain_device *parent =
1674 isci_device->domain_dev->parent;
1676 struct expander_device *parent_ex = &parent->ex_dev;
1678 for (i = 0; i < parent_ex->num_phys; i++) {
1680 struct ex_phy *phy = &parent_ex->ex_phy[i];
1682 if ((phy->phy_state == PHY_VACANT) ||
1683 (phy->phy_state == PHY_NOT_PRESENT))
1684 continue;
1686 if (SAS_ADDR(phy->attached_sas_addr)
1687 == SAS_ADDR(isci_device->domain_dev->sas_addr)) {
1689 discover_response.attached_dev_type
1690 = phy->attached_dev_type;
1691 discover_response.linkrate
1692 = phy->linkrate;
1693 discover_response.attached_sata_host
1694 = phy->attached_sata_host;
1695 discover_response.attached_sata_dev
1696 = phy->attached_sata_dev;
1697 discover_response.attached_sata_ps
1698 = phy->attached_sata_ps;
1699 discover_response.iproto
1700 = phy->attached_iproto >> 1;
1701 discover_response.tproto
1702 = phy->attached_tproto >> 1;
1703 memcpy(
1704 discover_response.attached_sas_addr,
1705 phy->attached_sas_addr,
1706 SAS_ADDR_SIZE
1708 discover_response.attached_phy_id
1709 = phy->attached_phy_id;
1710 discover_response.change_count
1711 = phy->phy_change_count;
1712 discover_response.routing_attr
1713 = phy->routing_attr;
1714 discover_response.hmin_linkrate
1715 = phy->phy->minimum_linkrate_hw;
1716 discover_response.hmax_linkrate
1717 = phy->phy->maximum_linkrate_hw;
1718 discover_response.pmin_linkrate
1719 = phy->phy->minimum_linkrate;
1720 discover_response.pmax_linkrate
1721 = phy->phy->maximum_linkrate;
1726 dev_dbg(&port->isci_host->pdev->dev,
1727 "%s: parent->dev_type = EDGE_DEV\n",
1728 __func__);
1730 status = scic_remote_device_ea_construct(port->sci_port_handle,
1731 &isci_device->sci,
1732 (struct smp_response_discover *)&discover_response);
1734 } else
1735 status = scic_remote_device_da_construct(port->sci_port_handle,
1736 &isci_device->sci);
1739 if (status != SCI_SUCCESS) {
1740 dev_dbg(&port->isci_host->pdev->dev,
1741 "%s: scic_remote_device_da_construct failed - "
1742 "isci_device = %p\n",
1743 __func__,
1744 isci_device);
1746 return status;
1749 /* XXX will be killed with sci_base_object removal */
1750 sci_object_set_association(&isci_device->sci, isci_device);
1752 /* start the device. */
1753 status = scic_remote_device_start(&isci_device->sci,
1754 ISCI_REMOTE_DEVICE_START_TIMEOUT);
1756 if (status != SCI_SUCCESS) {
1757 dev_warn(&port->isci_host->pdev->dev,
1758 "%s: scic_remote_device_start failed\n",
1759 __func__);
1760 return status;
1763 return status;
1766 void isci_remote_device_nuke_requests(struct isci_host *ihost, struct isci_remote_device *idev)
1768 DECLARE_COMPLETION_ONSTACK(aborted_task_completion);
1770 dev_dbg(&ihost->pdev->dev,
1771 "%s: idev = %p\n", __func__, idev);
1773 /* Cleanup all requests pending for this device. */
1774 isci_terminate_pending_requests(ihost, idev, terminating);
1776 dev_dbg(&ihost->pdev->dev,
1777 "%s: idev = %p, done\n", __func__, idev);
1781 * This function builds the isci_remote_device when a libsas dev_found message
1782 * is received.
1783 * @isci_host: This parameter specifies the isci host object.
1784 * @port: This parameter specifies the isci_port conected to this device.
1786 * pointer to new isci_remote_device.
1788 static struct isci_remote_device *
1789 isci_remote_device_alloc(struct isci_host *ihost, struct isci_port *iport)
1791 struct isci_remote_device *idev;
1792 int i;
1794 for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
1795 idev = &ihost->devices[i];
1796 if (!test_and_set_bit(IDEV_ALLOCATED, &idev->flags))
1797 break;
1800 if (i >= SCI_MAX_REMOTE_DEVICES) {
1801 dev_warn(&ihost->pdev->dev, "%s: failed\n", __func__);
1802 return NULL;
1805 if (WARN_ONCE(!list_empty(&idev->reqs_in_process), "found requests in process\n"))
1806 return NULL;
1808 if (WARN_ONCE(!list_empty(&idev->node), "found non-idle remote device\n"))
1809 return NULL;
1811 isci_remote_device_change_state(idev, isci_freed);
1813 return idev;
1817 * isci_remote_device_ready() - This function is called by the scic when the
1818 * remote device is ready. We mark the isci device as ready and signal the
1819 * waiting proccess.
1820 * @ihost: our valid isci_host
1821 * @idev: remote device
1824 void isci_remote_device_ready(struct isci_host *ihost, struct isci_remote_device *idev)
1826 dev_dbg(&ihost->pdev->dev,
1827 "%s: idev = %p\n", __func__, idev);
1829 isci_remote_device_change_state(idev, isci_ready_for_io);
1830 if (test_and_clear_bit(IDEV_START_PENDING, &idev->flags))
1831 wake_up(&ihost->eventq);
1835 * isci_remote_device_not_ready() - This function is called by the scic when
1836 * the remote device is not ready. We mark the isci device as ready (not
1837 * "ready_for_io") and signal the waiting proccess.
1838 * @isci_host: This parameter specifies the isci host object.
1839 * @isci_device: This parameter specifies the remote device
1842 void isci_remote_device_not_ready(struct isci_host *ihost,
1843 struct isci_remote_device *idev, u32 reason)
1845 dev_dbg(&ihost->pdev->dev,
1846 "%s: isci_device = %p\n", __func__, idev);
1848 if (reason == SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED)
1849 isci_remote_device_change_state(idev, isci_stopping);
1850 else
1851 /* device ready is actually a "not ready for io" state. */
1852 isci_remote_device_change_state(idev, isci_ready);
1856 * isci_remote_device_stop() - This function is called internally to stop the
1857 * remote device.
1858 * @isci_host: This parameter specifies the isci host object.
1859 * @isci_device: This parameter specifies the remote device.
1861 * The status of the scic request to stop.
1863 enum sci_status isci_remote_device_stop(struct isci_host *ihost, struct isci_remote_device *idev)
1865 enum sci_status status;
1866 unsigned long flags;
1868 dev_dbg(&ihost->pdev->dev,
1869 "%s: isci_device = %p\n", __func__, idev);
1871 isci_remote_device_change_state(idev, isci_stopping);
1873 /* Kill all outstanding requests. */
1874 isci_remote_device_nuke_requests(ihost, idev);
1876 set_bit(IDEV_STOP_PENDING, &idev->flags);
1878 spin_lock_irqsave(&ihost->scic_lock, flags);
1879 status = scic_remote_device_stop(&idev->sci, 50);
1880 spin_unlock_irqrestore(&ihost->scic_lock, flags);
1882 /* Wait for the stop complete callback. */
1883 if (status == SCI_SUCCESS) {
1884 wait_for_device_stop(ihost, idev);
1885 clear_bit(IDEV_ALLOCATED, &idev->flags);
1888 dev_dbg(&ihost->pdev->dev,
1889 "%s: idev = %p - after completion wait\n",
1890 __func__, idev);
1892 return status;
1896 * isci_remote_device_gone() - This function is called by libsas when a domain
1897 * device is removed.
1898 * @domain_device: This parameter specifies the libsas domain device.
1901 void isci_remote_device_gone(struct domain_device *dev)
1903 struct isci_host *ihost = dev_to_ihost(dev);
1904 struct isci_remote_device *idev = dev->lldd_dev;
1906 dev_dbg(&ihost->pdev->dev,
1907 "%s: domain_device = %p, isci_device = %p, isci_port = %p\n",
1908 __func__, dev, idev, idev->isci_port);
1910 isci_remote_device_stop(ihost, idev);
1915 * isci_remote_device_found() - This function is called by libsas when a remote
1916 * device is discovered. A remote device object is created and started. the
1917 * function then sleeps until the sci core device started message is
1918 * received.
1919 * @domain_device: This parameter specifies the libsas domain device.
1921 * status, zero indicates success.
1923 int isci_remote_device_found(struct domain_device *domain_dev)
1925 struct isci_host *isci_host = dev_to_ihost(domain_dev);
1926 struct isci_port *isci_port;
1927 struct isci_phy *isci_phy;
1928 struct asd_sas_port *sas_port;
1929 struct asd_sas_phy *sas_phy;
1930 struct isci_remote_device *isci_device;
1931 enum sci_status status;
1933 dev_dbg(&isci_host->pdev->dev,
1934 "%s: domain_device = %p\n", __func__, domain_dev);
1936 wait_for_start(isci_host);
1938 sas_port = domain_dev->port;
1939 sas_phy = list_first_entry(&sas_port->phy_list, struct asd_sas_phy,
1940 port_phy_el);
1941 isci_phy = to_isci_phy(sas_phy);
1942 isci_port = isci_phy->isci_port;
1944 /* we are being called for a device on this port,
1945 * so it has to come up eventually
1947 wait_for_completion(&isci_port->start_complete);
1949 if ((isci_stopping == isci_port_get_state(isci_port)) ||
1950 (isci_stopped == isci_port_get_state(isci_port)))
1951 return -ENODEV;
1953 isci_device = isci_remote_device_alloc(isci_host, isci_port);
1954 if (!isci_device)
1955 return -ENODEV;
1957 INIT_LIST_HEAD(&isci_device->node);
1958 domain_dev->lldd_dev = isci_device;
1959 isci_device->domain_dev = domain_dev;
1960 isci_device->isci_port = isci_port;
1961 isci_remote_device_change_state(isci_device, isci_starting);
1964 spin_lock_irq(&isci_host->scic_lock);
1965 list_add_tail(&isci_device->node, &isci_port->remote_dev_list);
1967 set_bit(IDEV_START_PENDING, &isci_device->flags);
1968 status = isci_remote_device_construct(isci_port, isci_device);
1969 spin_unlock_irq(&isci_host->scic_lock);
1971 dev_dbg(&isci_host->pdev->dev,
1972 "%s: isci_device = %p\n",
1973 __func__, isci_device);
1975 if (status != SCI_SUCCESS) {
1977 spin_lock_irq(&isci_host->scic_lock);
1978 isci_remote_device_deconstruct(
1979 isci_host,
1980 isci_device
1982 spin_unlock_irq(&isci_host->scic_lock);
1983 return -ENODEV;
1986 /* wait for the device ready callback. */
1987 wait_for_device_start(isci_host, isci_device);
1989 return 0;
1992 * isci_device_is_reset_pending() - This function will check if there is any
1993 * pending reset condition on the device.
1994 * @request: This parameter is the isci_device object.
1996 * true if there is a reset pending for the device.
1998 bool isci_device_is_reset_pending(
1999 struct isci_host *isci_host,
2000 struct isci_remote_device *isci_device)
2002 struct isci_request *isci_request;
2003 struct isci_request *tmp_req;
2004 bool reset_is_pending = false;
2005 unsigned long flags;
2007 dev_dbg(&isci_host->pdev->dev,
2008 "%s: isci_device = %p\n", __func__, isci_device);
2010 spin_lock_irqsave(&isci_host->scic_lock, flags);
2012 /* Check for reset on all pending requests. */
2013 list_for_each_entry_safe(isci_request, tmp_req,
2014 &isci_device->reqs_in_process, dev_node) {
2015 dev_dbg(&isci_host->pdev->dev,
2016 "%s: isci_device = %p request = %p\n",
2017 __func__, isci_device, isci_request);
2019 if (isci_request->ttype == io_task) {
2020 struct sas_task *task = isci_request_access_task(
2021 isci_request);
2023 spin_lock(&task->task_state_lock);
2024 if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET)
2025 reset_is_pending = true;
2026 spin_unlock(&task->task_state_lock);
2030 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
2032 dev_dbg(&isci_host->pdev->dev,
2033 "%s: isci_device = %p reset_is_pending = %d\n",
2034 __func__, isci_device, reset_is_pending);
2036 return reset_is_pending;
2040 * isci_device_clear_reset_pending() - This function will clear if any pending
2041 * reset condition flags on the device.
2042 * @request: This parameter is the isci_device object.
2044 * true if there is a reset pending for the device.
2046 void isci_device_clear_reset_pending(struct isci_host *ihost, struct isci_remote_device *idev)
2048 struct isci_request *isci_request;
2049 struct isci_request *tmp_req;
2050 unsigned long flags = 0;
2052 dev_dbg(&ihost->pdev->dev, "%s: idev=%p, ihost=%p\n",
2053 __func__, idev, ihost);
2055 spin_lock_irqsave(&ihost->scic_lock, flags);
2057 /* Clear reset pending on all pending requests. */
2058 list_for_each_entry_safe(isci_request, tmp_req,
2059 &idev->reqs_in_process, dev_node) {
2060 dev_dbg(&ihost->pdev->dev, "%s: idev = %p request = %p\n",
2061 __func__, idev, isci_request);
2063 if (isci_request->ttype == io_task) {
2065 unsigned long flags2;
2066 struct sas_task *task = isci_request_access_task(
2067 isci_request);
2069 spin_lock_irqsave(&task->task_state_lock, flags2);
2070 task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET;
2071 spin_unlock_irqrestore(&task->task_state_lock, flags2);
2074 spin_unlock_irqrestore(&ihost->scic_lock, flags);