diff options
Diffstat (limited to 'drivers/scsi/isci/core/scic_sds_ssp_request.c')
| -rw-r--r-- | drivers/scsi/isci/core/scic_sds_ssp_request.c | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/drivers/scsi/isci/core/scic_sds_ssp_request.c b/drivers/scsi/isci/core/scic_sds_ssp_request.c new file mode 100644 index 000000000000..0d6441c5ce00 --- /dev/null +++ b/drivers/scsi/isci/core/scic_sds_ssp_request.c @@ -0,0 +1,340 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + * This file contains the task management substate handlers for the + * SCIC_SDS_IO_REQUEST object. + * + * + */ + +#include "intel_sas.h" +#include "sci_environment.h" +#include "scic_sds_request.h" +#include "scic_controller.h" +#include "scic_sds_controller.h" +#include "scu_completion_codes.h" +#include "scu_task_context.h" + +/** + * This method processes the completions transport layer (TL) status to + * determine if the RAW task management frame was sent successfully. If the + * raw frame was sent successfully, then the state for the task request + * transitions to waiting for a response frame. + * @this_request: This parameter specifies the request for which the TC + * completion was received. + * @completion_code: This parameter indicates the completion status information + * for the TC. + * + * Indicate if the tc completion handler was successful. SCI_SUCCESS currently + * this method always returns success. + */ +static enum sci_status scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler( + struct scic_sds_request *this_request, + u32 completion_code) +{ + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + scic_sds_request_set_status( + this_request, SCU_TASK_DONE_GOOD, SCI_SUCCESS + ); + + sci_base_state_machine_change_state( + &this_request->started_substate_machine, + SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE + ); + break; + + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO): + /* + * Currently, the decision is to simply allow the task request to + * timeout if the task IU wasn't received successfully. + * There is a potential for receiving multiple task responses if we + * decide to send the task IU again. */ + dev_warn(scic_to_dev(this_request->owning_controller), + "%s: TaskRequest:0x%p CompletionCode:%x - " + "ACK/NAK timeout\n", + __func__, + this_request, + completion_code); + + sci_base_state_machine_change_state( + &this_request->started_substate_machine, + SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE + ); + break; + + default: + /* + * All other completion status cause the IO to be complete. If a NAK + * was received, then it is up to the user to retry the request. */ + scic_sds_request_set_status( + this_request, + SCU_NORMALIZE_COMPLETION_STATUS(completion_code), + SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR + ); + + sci_base_state_machine_change_state( + &this_request->parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); + break; + } + + return SCI_SUCCESS; +} + +/** + * This method is responsible for processing a terminate/abort request for this + * TC while the request is waiting for the task management response + * unsolicited frame. + * @this_request: This parameter specifies the request for which the + * termination was requested. + * + * This method returns an indication as to whether the abort request was + * successfully handled. need to update to ensure the received UF doesn't cause + * damage to subsequent requests (i.e. put the extended tag in a holding + * pattern for this particular device). + */ +static enum sci_status scic_sds_ssp_task_request_await_tc_response_abort_handler( + struct sci_base_request *request) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)request; + + sci_base_state_machine_change_state( + &this_request->parent.state_machine, + SCI_BASE_REQUEST_STATE_ABORTING + ); + + sci_base_state_machine_change_state( + &this_request->parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); + + return SCI_SUCCESS; +} + +/** + * This method processes an unsolicited frame while the task mgmt request is + * waiting for a response frame. It will copy the response data, release + * the unsolicited frame, and transition the request to the + * SCI_BASE_REQUEST_STATE_COMPLETED state. + * @this_request: This parameter specifies the request for which the + * unsolicited frame was received. + * @frame_index: This parameter indicates the unsolicited frame index that + * should contain the response. + * + * This method returns an indication of whether the TC response frame was + * handled successfully or not. SCI_SUCCESS Currently this value is always + * returned and indicates successful processing of the TC response. Should + * probably update to check frame type and make sure it is a response frame. + */ +static enum sci_status scic_sds_ssp_task_request_await_tc_response_frame_handler( + struct scic_sds_request *this_request, + u32 frame_index) +{ + scic_sds_io_request_copy_response(this_request); + + sci_base_state_machine_change_state( + &this_request->parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); + + scic_sds_controller_release_frame( + this_request->owning_controller, frame_index + ); + + return SCI_SUCCESS; +} + +const struct scic_sds_io_request_state_handler scic_sds_ssp_task_request_started_substate_handler_table[] = { + [SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler, + .event_handler = scic_sds_request_default_event_handler, + .frame_handler = scic_sds_request_default_frame_handler, + }, + [SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_ssp_task_request_await_tc_response_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_request_default_tc_completion_handler, + .event_handler = scic_sds_request_default_event_handler, + .frame_handler = scic_sds_ssp_task_request_await_tc_response_frame_handler, + } +}; + +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + * This file contains the enter/exit methods associated with each of the task + * management raw request states. For more information on the task + * management request state machine please refer to scic_sds_io_request.h + * + * + */ + +#include "scic_sds_request.h" +#include "sci_base_state_machine.h" + +/** + * This method performs the actions required when entering the + * SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION + * sub-state. This includes setting the IO request state handlers for this + * sub-state. + * @object: This parameter specifies the request object for which the sub-state + * change is occuring. + * + * none. + */ +static void scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + scic_sds_ssp_task_request_started_substate_handler_table, + SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION + ); +} + +/** + * This method performs the actions required when entering the + * SCIC_SDS_IO_REQUEST_STARTED_SUBSTATE_AWAIT_TC_RESPONSE sub-state. This + * includes setting the IO request state handlers for this sub-state. + * @object: This parameter specifies the request object for which the sub-state + * change is occuring. + * + * none. + */ +static void scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + scic_sds_ssp_task_request_started_substate_handler_table, + SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE + ); +} + +const struct sci_base_state scic_sds_io_request_started_task_mgmt_substate_table[] = { + [SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION] = { + .enter_state = scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter, + }, + [SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE] = { + .enter_state = scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter, + }, +}; + |