e301370ac5
This cleans up several areas of the state machine mechanism:
o Rename sci_base_state_machine_change_state to sci_change_state
o Remove sci_base_state_machine_get_state function
o Rename 'state_machine' struct member to 'sm' in client structs
o Shorten the name of request states
o Shorten state machine state names as follows:
SCI_BASE_CONTROLLER_STATE_xxx to SCIC_xxx
SCI_BASE_PHY_STATE_xxx to SCI_PHY_xxx
SCIC_SDS_PHY_STARTING_SUBSTATE_xxx to SCI_PHY_SUB_xxx
SCI_BASE_PORT_STATE_xxx to SCI_PORT_xxx and
SCIC_SDS_PORT_READY_SUBSTATE_xxx to SCI_PORT_SUB_xxx
SCI_BASE_REMOTE_DEVICE_STATE_xxx to SCI_DEV_xxx
SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_xxx to SCI_STP_DEV_xxx
SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_xxx to SCI_SMP_DEV_xxx
SCIC_SDS_REMOTE_NODE_CONTEXT_xxx_STATE to SCI_RNC_xxx
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
639 lines
21 KiB
C
639 lines
21 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "host.h"
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#include "state_machine.h"
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#include "remote_device.h"
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#include "remote_node_context.h"
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#include "scu_event_codes.h"
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#include "scu_task_context.h"
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/**
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*
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* @sci_rnc: The RNC for which the is posted request is being made.
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*
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* This method will return true if the RNC is not in the initial state. In all
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* other states the RNC is considered active and this will return true. The
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* destroy request of the state machine drives the RNC back to the initial
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* state. If the state machine changes then this routine will also have to be
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* changed. bool true if the state machine is not in the initial state false if
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* the state machine is in the initial state
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*/
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/**
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*
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* @sci_rnc: The state of the remote node context object to check.
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*
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* This method will return true if the remote node context is in a READY state
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* otherwise it will return false bool true if the remote node context is in
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* the ready state. false if the remote node context is not in the ready state.
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*/
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bool scic_sds_remote_node_context_is_ready(
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struct scic_sds_remote_node_context *sci_rnc)
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{
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u32 current_state = sci_rnc->sm.current_state_id;
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if (current_state == SCI_RNC_READY) {
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return true;
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}
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return false;
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}
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/**
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*
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* @sci_dev: The remote device to use to construct the RNC buffer.
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* @rnc: The buffer into which the remote device data will be copied.
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*
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* This method will construct the RNC buffer for this remote device object. none
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*/
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static void scic_sds_remote_node_context_construct_buffer(
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struct scic_sds_remote_node_context *sci_rnc)
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{
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struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc);
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struct domain_device *dev = sci_dev_to_domain(sci_dev);
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int rni = sci_rnc->remote_node_index;
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union scu_remote_node_context *rnc;
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struct scic_sds_controller *scic;
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__le64 sas_addr;
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scic = scic_sds_remote_device_get_controller(sci_dev);
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rnc = scic_sds_controller_get_remote_node_context_buffer(scic, rni);
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memset(rnc, 0, sizeof(union scu_remote_node_context)
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* scic_sds_remote_device_node_count(sci_dev));
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rnc->ssp.remote_node_index = rni;
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rnc->ssp.remote_node_port_width = sci_dev->device_port_width;
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rnc->ssp.logical_port_index = sci_dev->owning_port->physical_port_index;
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/* sas address is __be64, context ram format is __le64 */
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sas_addr = cpu_to_le64(SAS_ADDR(dev->sas_addr));
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rnc->ssp.remote_sas_address_hi = upper_32_bits(sas_addr);
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rnc->ssp.remote_sas_address_lo = lower_32_bits(sas_addr);
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rnc->ssp.nexus_loss_timer_enable = true;
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rnc->ssp.check_bit = false;
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rnc->ssp.is_valid = false;
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rnc->ssp.is_remote_node_context = true;
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rnc->ssp.function_number = 0;
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rnc->ssp.arbitration_wait_time = 0;
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if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
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rnc->ssp.connection_occupancy_timeout =
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scic->user_parameters.sds1.stp_max_occupancy_timeout;
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rnc->ssp.connection_inactivity_timeout =
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scic->user_parameters.sds1.stp_inactivity_timeout;
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} else {
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rnc->ssp.connection_occupancy_timeout =
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scic->user_parameters.sds1.ssp_max_occupancy_timeout;
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rnc->ssp.connection_inactivity_timeout =
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scic->user_parameters.sds1.ssp_inactivity_timeout;
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}
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rnc->ssp.initial_arbitration_wait_time = 0;
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/* Open Address Frame Parameters */
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rnc->ssp.oaf_connection_rate = sci_dev->connection_rate;
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rnc->ssp.oaf_features = 0;
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rnc->ssp.oaf_source_zone_group = 0;
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rnc->ssp.oaf_more_compatibility_features = 0;
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}
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/**
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*
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* @sci_rnc:
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* @callback:
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* @callback_parameter:
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*
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* This method will setup the remote node context object so it will transition
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* to its ready state. If the remote node context is already setup to
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* transition to its final state then this function does nothing. none
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*/
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static void scic_sds_remote_node_context_setup_to_resume(
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struct scic_sds_remote_node_context *sci_rnc,
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scics_sds_remote_node_context_callback callback,
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void *callback_parameter)
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{
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if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL) {
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sci_rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY;
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sci_rnc->user_callback = callback;
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sci_rnc->user_cookie = callback_parameter;
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}
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}
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static void scic_sds_remote_node_context_setup_to_destory(
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struct scic_sds_remote_node_context *sci_rnc,
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scics_sds_remote_node_context_callback callback,
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void *callback_parameter)
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{
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sci_rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL;
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sci_rnc->user_callback = callback;
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sci_rnc->user_cookie = callback_parameter;
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}
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/**
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*
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*
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* This method just calls the user callback function and then resets the
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* callback.
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*/
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static void scic_sds_remote_node_context_notify_user(
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struct scic_sds_remote_node_context *rnc)
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{
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if (rnc->user_callback != NULL) {
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(*rnc->user_callback)(rnc->user_cookie);
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rnc->user_callback = NULL;
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rnc->user_cookie = NULL;
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}
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}
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static void scic_sds_remote_node_context_continue_state_transitions(struct scic_sds_remote_node_context *rnc)
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{
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if (rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY)
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scic_sds_remote_node_context_resume(rnc, rnc->user_callback,
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rnc->user_cookie);
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}
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/**
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*
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* @sci_rnc: The remote node context object that is to be validated.
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*
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* This method will mark the rnc buffer as being valid and post the request to
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* the hardware. none
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*/
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static void scic_sds_remote_node_context_validate_context_buffer(
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struct scic_sds_remote_node_context *sci_rnc)
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{
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struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc);
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struct domain_device *dev = sci_dev_to_domain(sci_dev);
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union scu_remote_node_context *rnc_buffer;
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rnc_buffer = scic_sds_controller_get_remote_node_context_buffer(
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scic_sds_remote_device_get_controller(sci_dev),
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sci_rnc->remote_node_index
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);
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rnc_buffer->ssp.is_valid = true;
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if (!sci_dev->is_direct_attached &&
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(dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))) {
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scic_sds_remote_device_post_request(sci_dev,
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SCU_CONTEXT_COMMAND_POST_RNC_96);
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} else {
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scic_sds_remote_device_post_request(sci_dev, SCU_CONTEXT_COMMAND_POST_RNC_32);
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if (sci_dev->is_direct_attached) {
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scic_sds_port_setup_transports(sci_dev->owning_port,
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sci_rnc->remote_node_index);
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}
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}
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}
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/**
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*
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* @sci_rnc: The remote node context object that is to be invalidated.
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*
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* This method will update the RNC buffer and post the invalidate request. none
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*/
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static void scic_sds_remote_node_context_invalidate_context_buffer(
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struct scic_sds_remote_node_context *sci_rnc)
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{
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union scu_remote_node_context *rnc_buffer;
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rnc_buffer = scic_sds_controller_get_remote_node_context_buffer(
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scic_sds_remote_device_get_controller(rnc_to_dev(sci_rnc)),
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sci_rnc->remote_node_index);
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rnc_buffer->ssp.is_valid = false;
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scic_sds_remote_device_post_request(rnc_to_dev(sci_rnc),
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SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE);
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}
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static void scic_sds_remote_node_context_initial_state_enter(struct sci_base_state_machine *sm)
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{
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struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
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/* Check to see if we have gotten back to the initial state because
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* someone requested to destroy the remote node context object.
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*/
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if (sm->previous_state_id == SCI_RNC_INVALIDATING) {
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rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED;
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scic_sds_remote_node_context_notify_user(rnc);
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}
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}
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static void scic_sds_remote_node_context_posting_state_enter(struct sci_base_state_machine *sm)
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{
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struct scic_sds_remote_node_context *sci_rnc = container_of(sm, typeof(*sci_rnc), sm);
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scic_sds_remote_node_context_validate_context_buffer(sci_rnc);
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}
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static void scic_sds_remote_node_context_invalidating_state_enter(struct sci_base_state_machine *sm)
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{
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struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
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scic_sds_remote_node_context_invalidate_context_buffer(rnc);
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}
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static void scic_sds_remote_node_context_resuming_state_enter(struct sci_base_state_machine *sm)
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{
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struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
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struct scic_sds_remote_device *sci_dev;
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struct domain_device *dev;
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sci_dev = rnc_to_dev(rnc);
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dev = sci_dev_to_domain(sci_dev);
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/*
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* For direct attached SATA devices we need to clear the TLCR
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* NCQ to TCi tag mapping on the phy and in cases where we
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* resume because of a target reset we also need to update
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* the STPTLDARNI register with the RNi of the device
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*/
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if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) &&
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sci_dev->is_direct_attached)
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scic_sds_port_setup_transports(sci_dev->owning_port,
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rnc->remote_node_index);
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scic_sds_remote_device_post_request(sci_dev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME);
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}
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static void scic_sds_remote_node_context_ready_state_enter(struct sci_base_state_machine *sm)
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{
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struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
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rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED;
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if (rnc->user_callback)
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scic_sds_remote_node_context_notify_user(rnc);
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}
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static void scic_sds_remote_node_context_tx_suspended_state_enter(struct sci_base_state_machine *sm)
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{
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struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
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scic_sds_remote_node_context_continue_state_transitions(rnc);
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}
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static void scic_sds_remote_node_context_tx_rx_suspended_state_enter(struct sci_base_state_machine *sm)
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{
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struct scic_sds_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
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scic_sds_remote_node_context_continue_state_transitions(rnc);
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}
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static const struct sci_base_state scic_sds_remote_node_context_state_table[] = {
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[SCI_RNC_INITIAL] = {
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.enter_state = scic_sds_remote_node_context_initial_state_enter,
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},
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[SCI_RNC_POSTING] = {
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.enter_state = scic_sds_remote_node_context_posting_state_enter,
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},
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[SCI_RNC_INVALIDATING] = {
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.enter_state = scic_sds_remote_node_context_invalidating_state_enter,
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},
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[SCI_RNC_RESUMING] = {
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.enter_state = scic_sds_remote_node_context_resuming_state_enter,
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},
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[SCI_RNC_READY] = {
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.enter_state = scic_sds_remote_node_context_ready_state_enter,
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},
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[SCI_RNC_TX_SUSPENDED] = {
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.enter_state = scic_sds_remote_node_context_tx_suspended_state_enter,
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},
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[SCI_RNC_TX_RX_SUSPENDED] = {
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.enter_state = scic_sds_remote_node_context_tx_rx_suspended_state_enter,
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},
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[SCI_RNC_AWAIT_SUSPENSION] = { },
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};
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void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context *rnc,
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u16 remote_node_index)
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{
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memset(rnc, 0, sizeof(struct scic_sds_remote_node_context));
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rnc->remote_node_index = remote_node_index;
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rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED;
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sci_base_state_machine_construct(&rnc->sm,
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scic_sds_remote_node_context_state_table,
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SCI_RNC_INITIAL);
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sci_base_state_machine_start(&rnc->sm);
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}
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enum sci_status scic_sds_remote_node_context_event_handler(struct scic_sds_remote_node_context *sci_rnc,
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u32 event_code)
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{
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enum scis_sds_remote_node_context_states state;
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state = sci_rnc->sm.current_state_id;
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switch (state) {
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case SCI_RNC_POSTING:
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switch (scu_get_event_code(event_code)) {
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case SCU_EVENT_POST_RNC_COMPLETE:
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sci_change_state(&sci_rnc->sm, SCI_RNC_READY);
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break;
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default:
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goto out;
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}
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break;
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case SCI_RNC_INVALIDATING:
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if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) {
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if (sci_rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL)
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state = SCI_RNC_INITIAL;
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else
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state = SCI_RNC_POSTING;
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sci_change_state(&sci_rnc->sm, state);
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} else {
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switch (scu_get_event_type(event_code)) {
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case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
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case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
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/* We really dont care if the hardware is going to suspend
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* the device since it's being invalidated anyway */
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dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
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"%s: SCIC Remote Node Context 0x%p was "
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"suspeneded by hardware while being "
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"invalidated.\n", __func__, sci_rnc);
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break;
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default:
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goto out;
|
|
}
|
|
}
|
|
break;
|
|
case SCI_RNC_RESUMING:
|
|
if (scu_get_event_code(event_code) == SCU_EVENT_POST_RCN_RELEASE) {
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_READY);
|
|
} else {
|
|
switch (scu_get_event_type(event_code)) {
|
|
case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
|
|
case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
|
|
/* We really dont care if the hardware is going to suspend
|
|
* the device since it's being resumed anyway */
|
|
dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
|
"%s: SCIC Remote Node Context 0x%p was "
|
|
"suspeneded by hardware while being resumed.\n",
|
|
__func__, sci_rnc);
|
|
break;
|
|
default:
|
|
goto out;
|
|
}
|
|
}
|
|
break;
|
|
case SCI_RNC_READY:
|
|
switch (scu_get_event_type(event_code)) {
|
|
case SCU_EVENT_TL_RNC_SUSPEND_TX:
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED);
|
|
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
|
|
break;
|
|
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
|
|
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
|
|
break;
|
|
default:
|
|
goto out;
|
|
}
|
|
break;
|
|
case SCI_RNC_AWAIT_SUSPENSION:
|
|
switch (scu_get_event_type(event_code)) {
|
|
case SCU_EVENT_TL_RNC_SUSPEND_TX:
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED);
|
|
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
|
|
break;
|
|
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
|
|
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
|
|
break;
|
|
default:
|
|
goto out;
|
|
}
|
|
break;
|
|
default:
|
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
|
"%s: invalid state %d\n", __func__, state);
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
return SCI_SUCCESS;
|
|
|
|
out:
|
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
|
"%s: code: %#x state: %d\n", __func__, event_code, state);
|
|
return SCI_FAILURE;
|
|
|
|
}
|
|
|
|
enum sci_status scic_sds_remote_node_context_destruct(struct scic_sds_remote_node_context *sci_rnc,
|
|
scics_sds_remote_node_context_callback cb_fn,
|
|
void *cb_p)
|
|
{
|
|
enum scis_sds_remote_node_context_states state;
|
|
|
|
state = sci_rnc->sm.current_state_id;
|
|
switch (state) {
|
|
case SCI_RNC_INVALIDATING:
|
|
scic_sds_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p);
|
|
return SCI_SUCCESS;
|
|
case SCI_RNC_POSTING:
|
|
case SCI_RNC_RESUMING:
|
|
case SCI_RNC_READY:
|
|
case SCI_RNC_TX_SUSPENDED:
|
|
case SCI_RNC_TX_RX_SUSPENDED:
|
|
case SCI_RNC_AWAIT_SUSPENSION:
|
|
scic_sds_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p);
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING);
|
|
return SCI_SUCCESS;
|
|
case SCI_RNC_INITIAL:
|
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
|
"%s: invalid state %d\n", __func__, state);
|
|
/* We have decided that the destruct request on the remote node context
|
|
* can not fail since it is either in the initial/destroyed state or is
|
|
* can be destroyed.
|
|
*/
|
|
return SCI_SUCCESS;
|
|
default:
|
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
|
"%s: invalid state %d\n", __func__, state);
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
}
|
|
|
|
enum sci_status scic_sds_remote_node_context_suspend(struct scic_sds_remote_node_context *sci_rnc,
|
|
u32 suspend_type,
|
|
scics_sds_remote_node_context_callback cb_fn,
|
|
void *cb_p)
|
|
{
|
|
enum scis_sds_remote_node_context_states state;
|
|
|
|
state = sci_rnc->sm.current_state_id;
|
|
if (state != SCI_RNC_READY) {
|
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
|
"%s: invalid state %d\n", __func__, state);
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
sci_rnc->user_callback = cb_fn;
|
|
sci_rnc->user_cookie = cb_p;
|
|
sci_rnc->suspension_code = suspend_type;
|
|
|
|
if (suspend_type == SCI_SOFTWARE_SUSPENSION) {
|
|
scic_sds_remote_device_post_request(rnc_to_dev(sci_rnc),
|
|
SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX);
|
|
}
|
|
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION);
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
enum sci_status scic_sds_remote_node_context_resume(struct scic_sds_remote_node_context *sci_rnc,
|
|
scics_sds_remote_node_context_callback cb_fn,
|
|
void *cb_p)
|
|
{
|
|
enum scis_sds_remote_node_context_states state;
|
|
|
|
state = sci_rnc->sm.current_state_id;
|
|
switch (state) {
|
|
case SCI_RNC_INITIAL:
|
|
if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
|
|
scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
|
|
scic_sds_remote_node_context_construct_buffer(sci_rnc);
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_POSTING);
|
|
return SCI_SUCCESS;
|
|
case SCI_RNC_POSTING:
|
|
case SCI_RNC_INVALIDATING:
|
|
case SCI_RNC_RESUMING:
|
|
if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY)
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
|
|
sci_rnc->user_callback = cb_fn;
|
|
sci_rnc->user_cookie = cb_p;
|
|
return SCI_SUCCESS;
|
|
case SCI_RNC_TX_SUSPENDED: {
|
|
struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc);
|
|
struct domain_device *dev = sci_dev_to_domain(sci_dev);
|
|
|
|
scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
|
|
|
|
/* TODO: consider adding a resume action of NONE, INVALIDATE, WRITE_TLCR */
|
|
if (dev->dev_type == SAS_END_DEV || dev_is_expander(dev))
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING);
|
|
else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
|
|
if (sci_dev->is_direct_attached) {
|
|
/* @todo Fix this since I am being silly in writing to the STPTLDARNI register. */
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING);
|
|
} else {
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING);
|
|
}
|
|
} else
|
|
return SCI_FAILURE;
|
|
return SCI_SUCCESS;
|
|
}
|
|
case SCI_RNC_TX_RX_SUSPENDED:
|
|
scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
|
|
sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING);
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
case SCI_RNC_AWAIT_SUSPENSION:
|
|
scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
|
|
return SCI_SUCCESS;
|
|
default:
|
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
|
"%s: invalid state %d\n", __func__, state);
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
}
|
|
|
|
enum sci_status scic_sds_remote_node_context_start_io(struct scic_sds_remote_node_context *sci_rnc,
|
|
struct scic_sds_request *sci_req)
|
|
{
|
|
enum scis_sds_remote_node_context_states state;
|
|
|
|
state = sci_rnc->sm.current_state_id;
|
|
if (state != SCI_RNC_READY) {
|
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
|
"%s: invalid state %d\n", __func__, state);
|
|
return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED;
|
|
}
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
enum sci_status scic_sds_remote_node_context_start_task(struct scic_sds_remote_node_context *sci_rnc,
|
|
struct scic_sds_request *sci_req)
|
|
{
|
|
enum scis_sds_remote_node_context_states state;
|
|
|
|
state = sci_rnc->sm.current_state_id;
|
|
switch (state) {
|
|
case SCI_RNC_RESUMING:
|
|
case SCI_RNC_READY:
|
|
case SCI_RNC_AWAIT_SUSPENSION:
|
|
return SCI_SUCCESS;
|
|
case SCI_RNC_TX_SUSPENDED:
|
|
case SCI_RNC_TX_RX_SUSPENDED:
|
|
scic_sds_remote_node_context_resume(sci_rnc, NULL, NULL);
|
|
return SCI_SUCCESS;
|
|
default:
|
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
|
"%s: invalid state %d\n", __func__, state);
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
}
|