/*
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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 <scsi/sas_ata.h>
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#include "host.h"
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#include "isci.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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#undef C
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#define C(a) (#a)
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const char *rnc_state_name(enum scis_sds_remote_node_context_states state)
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{
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static const char * const strings[] = RNC_STATES;
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if (state >= ARRAY_SIZE(strings))
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return "UNKNOWN";
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return strings[state];
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}
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#undef C
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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 sci_remote_node_context_is_ready(
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struct sci_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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bool sci_remote_node_context_is_suspended(struct sci_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_TX_RX_SUSPENDED)
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return true;
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return false;
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}
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static union scu_remote_node_context *sci_rnc_by_id(struct isci_host *ihost, u16 id)
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{
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if (id < ihost->remote_node_entries &&
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ihost->device_table[id])
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return &ihost->remote_node_context_table[id];
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return NULL;
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}
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static void sci_remote_node_context_construct_buffer(struct sci_remote_node_context *sci_rnc)
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{
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struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
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struct domain_device *dev = idev->domain_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 isci_host *ihost;
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__le64 sas_addr;
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ihost = idev->owning_port->owning_controller;
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rnc = sci_rnc_by_id(ihost, rni);
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memset(rnc, 0, sizeof(union scu_remote_node_context)
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* sci_remote_device_node_count(idev));
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rnc->ssp.remote_node_index = rni;
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rnc->ssp.remote_node_port_width = idev->device_port_width;
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rnc->ssp.logical_port_index = idev->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_is_sata(dev)) {
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rnc->ssp.connection_occupancy_timeout =
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ihost->user_parameters.stp_max_occupancy_timeout;
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rnc->ssp.connection_inactivity_timeout =
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ihost->user_parameters.stp_inactivity_timeout;
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} else {
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rnc->ssp.connection_occupancy_timeout =
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ihost->user_parameters.ssp_max_occupancy_timeout;
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rnc->ssp.connection_inactivity_timeout =
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ihost->user_parameters.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 = idev->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 sci_remote_node_context_setup_to_resume(
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struct sci_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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enum sci_remote_node_context_destination_state dest_param)
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{
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if (sci_rnc->destination_state != RNC_DEST_FINAL) {
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sci_rnc->destination_state = dest_param;
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if (callback != NULL) {
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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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static void sci_remote_node_context_setup_to_destroy(
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struct sci_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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struct isci_host *ihost = idev_to_ihost(rnc_to_dev(sci_rnc));
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sci_rnc->destination_state = RNC_DEST_FINAL;
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sci_rnc->user_callback = callback;
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sci_rnc->user_cookie = callback_parameter;
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wake_up(&ihost->eventq);
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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 sci_remote_node_context_notify_user(
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struct sci_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);
|
|
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 sci_remote_node_context_continue_state_transitions(struct sci_remote_node_context *rnc)
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{
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switch (rnc->destination_state) {
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case RNC_DEST_READY:
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case RNC_DEST_SUSPENDED_RESUME:
|
rnc->destination_state = RNC_DEST_READY;
|
fallthrough;
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case RNC_DEST_FINAL:
|
sci_remote_node_context_resume(rnc, rnc->user_callback,
|
rnc->user_cookie);
|
break;
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default:
|
rnc->destination_state = RNC_DEST_UNSPECIFIED;
|
break;
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}
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}
|
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static void sci_remote_node_context_validate_context_buffer(struct sci_remote_node_context *sci_rnc)
|
{
|
union scu_remote_node_context *rnc_buffer;
|
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
|
struct domain_device *dev = idev->domain_dev;
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struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index);
|
|
rnc_buffer->ssp.is_valid = true;
|
|
if (dev_is_sata(dev) && dev->parent) {
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sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_96);
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} else {
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sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_32);
|
|
if (!dev->parent)
|
sci_port_setup_transports(idev->owning_port,
|
sci_rnc->remote_node_index);
|
}
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}
|
|
static void sci_remote_node_context_invalidate_context_buffer(struct sci_remote_node_context *sci_rnc)
|
{
|
union scu_remote_node_context *rnc_buffer;
|
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
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struct isci_host *ihost = idev->owning_port->owning_controller;
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|
rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index);
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|
rnc_buffer->ssp.is_valid = false;
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|
sci_remote_device_post_request(rnc_to_dev(sci_rnc),
|
SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE);
|
}
|
|
static void sci_remote_node_context_initial_state_enter(struct sci_base_state_machine *sm)
|
{
|
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
|
struct isci_remote_device *idev = rnc_to_dev(rnc);
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
/* 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.
|
*/
|
if (sm->previous_state_id == SCI_RNC_INVALIDATING) {
|
rnc->destination_state = RNC_DEST_UNSPECIFIED;
|
sci_remote_node_context_notify_user(rnc);
|
|
smp_wmb();
|
wake_up(&ihost->eventq);
|
}
|
}
|
|
static void sci_remote_node_context_posting_state_enter(struct sci_base_state_machine *sm)
|
{
|
struct sci_remote_node_context *sci_rnc = container_of(sm, typeof(*sci_rnc), sm);
|
|
sci_remote_node_context_validate_context_buffer(sci_rnc);
|
}
|
|
static void sci_remote_node_context_invalidating_state_enter(struct sci_base_state_machine *sm)
|
{
|
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
|
|
/* Terminate all outstanding requests. */
|
sci_remote_device_terminate_requests(rnc_to_dev(rnc));
|
sci_remote_node_context_invalidate_context_buffer(rnc);
|
}
|
|
static void sci_remote_node_context_resuming_state_enter(struct sci_base_state_machine *sm)
|
{
|
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
|
struct isci_remote_device *idev;
|
struct domain_device *dev;
|
|
idev = rnc_to_dev(rnc);
|
dev = idev->domain_dev;
|
|
/*
|
* For direct attached SATA devices we need to clear the TLCR
|
* NCQ to TCi tag mapping on the phy and in cases where we
|
* resume because of a target reset we also need to update
|
* the STPTLDARNI register with the RNi of the device
|
*/
|
if (dev_is_sata(dev) && !dev->parent)
|
sci_port_setup_transports(idev->owning_port, rnc->remote_node_index);
|
|
sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME);
|
}
|
|
static void sci_remote_node_context_ready_state_enter(struct sci_base_state_machine *sm)
|
{
|
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
|
enum sci_remote_node_context_destination_state dest_select;
|
int tell_user = 1;
|
|
dest_select = rnc->destination_state;
|
rnc->destination_state = RNC_DEST_UNSPECIFIED;
|
|
if ((dest_select == RNC_DEST_SUSPENDED) ||
|
(dest_select == RNC_DEST_SUSPENDED_RESUME)) {
|
sci_remote_node_context_suspend(
|
rnc, rnc->suspend_reason,
|
SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT);
|
|
if (dest_select == RNC_DEST_SUSPENDED_RESUME)
|
tell_user = 0; /* Wait until ready again. */
|
}
|
if (tell_user)
|
sci_remote_node_context_notify_user(rnc);
|
}
|
|
static void sci_remote_node_context_tx_suspended_state_enter(struct sci_base_state_machine *sm)
|
{
|
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
|
|
sci_remote_node_context_continue_state_transitions(rnc);
|
}
|
|
static void sci_remote_node_context_tx_rx_suspended_state_enter(struct sci_base_state_machine *sm)
|
{
|
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
|
struct isci_remote_device *idev = rnc_to_dev(rnc);
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
u32 new_count = rnc->suspend_count + 1;
|
|
if (new_count == 0)
|
rnc->suspend_count = 1;
|
else
|
rnc->suspend_count = new_count;
|
smp_wmb();
|
|
/* Terminate outstanding requests pending abort. */
|
sci_remote_device_abort_requests_pending_abort(idev);
|
|
wake_up(&ihost->eventq);
|
sci_remote_node_context_continue_state_transitions(rnc);
|
}
|
|
static void sci_remote_node_context_await_suspend_state_exit(
|
struct sci_base_state_machine *sm)
|
{
|
struct sci_remote_node_context *rnc
|
= container_of(sm, typeof(*rnc), sm);
|
struct isci_remote_device *idev = rnc_to_dev(rnc);
|
|
if (dev_is_sata(idev->domain_dev))
|
isci_dev_set_hang_detection_timeout(idev, 0);
|
}
|
|
static const struct sci_base_state sci_remote_node_context_state_table[] = {
|
[SCI_RNC_INITIAL] = {
|
.enter_state = sci_remote_node_context_initial_state_enter,
|
},
|
[SCI_RNC_POSTING] = {
|
.enter_state = sci_remote_node_context_posting_state_enter,
|
},
|
[SCI_RNC_INVALIDATING] = {
|
.enter_state = sci_remote_node_context_invalidating_state_enter,
|
},
|
[SCI_RNC_RESUMING] = {
|
.enter_state = sci_remote_node_context_resuming_state_enter,
|
},
|
[SCI_RNC_READY] = {
|
.enter_state = sci_remote_node_context_ready_state_enter,
|
},
|
[SCI_RNC_TX_SUSPENDED] = {
|
.enter_state = sci_remote_node_context_tx_suspended_state_enter,
|
},
|
[SCI_RNC_TX_RX_SUSPENDED] = {
|
.enter_state = sci_remote_node_context_tx_rx_suspended_state_enter,
|
},
|
[SCI_RNC_AWAIT_SUSPENSION] = {
|
.exit_state = sci_remote_node_context_await_suspend_state_exit,
|
},
|
};
|
|
void sci_remote_node_context_construct(struct sci_remote_node_context *rnc,
|
u16 remote_node_index)
|
{
|
memset(rnc, 0, sizeof(struct sci_remote_node_context));
|
|
rnc->remote_node_index = remote_node_index;
|
rnc->destination_state = RNC_DEST_UNSPECIFIED;
|
|
sci_init_sm(&rnc->sm, sci_remote_node_context_state_table, SCI_RNC_INITIAL);
|
}
|
|
enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_context *sci_rnc,
|
u32 event_code)
|
{
|
enum scis_sds_remote_node_context_states state;
|
u32 next_state;
|
|
state = sci_rnc->sm.current_state_id;
|
switch (state) {
|
case SCI_RNC_POSTING:
|
switch (scu_get_event_code(event_code)) {
|
case SCU_EVENT_POST_RNC_COMPLETE:
|
sci_change_state(&sci_rnc->sm, SCI_RNC_READY);
|
break;
|
default:
|
goto out;
|
}
|
break;
|
case SCI_RNC_INVALIDATING:
|
if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) {
|
if (sci_rnc->destination_state == RNC_DEST_FINAL)
|
next_state = SCI_RNC_INITIAL;
|
else
|
next_state = SCI_RNC_POSTING;
|
sci_change_state(&sci_rnc->sm, next_state);
|
} 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 invalidated anyway */
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: SCIC Remote Node Context 0x%p was "
|
"suspended by hardware while being "
|
"invalidated.\n", __func__, sci_rnc);
|
break;
|
default:
|
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_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: SCIC Remote Node Context 0x%p was "
|
"suspended 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->suspend_type = scu_get_event_type(event_code);
|
break;
|
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
|
sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
|
sci_rnc->suspend_type = scu_get_event_type(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:
|
next_state = SCI_RNC_TX_SUSPENDED;
|
break;
|
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
|
next_state = SCI_RNC_TX_RX_SUSPENDED;
|
break;
|
default:
|
goto out;
|
}
|
if (sci_rnc->suspend_type == scu_get_event_type(event_code))
|
sci_change_state(&sci_rnc->sm, next_state);
|
break;
|
default:
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: invalid state: %s\n", __func__,
|
rnc_state_name(state));
|
return SCI_FAILURE_INVALID_STATE;
|
}
|
return SCI_SUCCESS;
|
|
out:
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: code: %#x state: %s\n", __func__, event_code,
|
rnc_state_name(state));
|
return SCI_FAILURE;
|
|
}
|
|
enum sci_status sci_remote_node_context_destruct(struct sci_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:
|
sci_remote_node_context_setup_to_destroy(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:
|
sci_remote_node_context_setup_to_destroy(sci_rnc, cb_fn, cb_p);
|
sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING);
|
return SCI_SUCCESS;
|
case SCI_RNC_AWAIT_SUSPENSION:
|
sci_remote_node_context_setup_to_destroy(sci_rnc, cb_fn, cb_p);
|
return SCI_SUCCESS;
|
case SCI_RNC_INITIAL:
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: invalid state: %s\n", __func__,
|
rnc_state_name(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 %s\n", __func__,
|
rnc_state_name(state));
|
return SCI_FAILURE_INVALID_STATE;
|
}
|
}
|
|
enum sci_status sci_remote_node_context_suspend(
|
struct sci_remote_node_context *sci_rnc,
|
enum sci_remote_node_suspension_reasons suspend_reason,
|
u32 suspend_type)
|
{
|
enum scis_sds_remote_node_context_states state
|
= sci_rnc->sm.current_state_id;
|
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
|
enum sci_status status = SCI_FAILURE_INVALID_STATE;
|
enum sci_remote_node_context_destination_state dest_param =
|
RNC_DEST_UNSPECIFIED;
|
|
dev_dbg(scirdev_to_dev(idev),
|
"%s: current state %s, current suspend_type %x dest state %d,"
|
" arg suspend_reason %d, arg suspend_type %x",
|
__func__, rnc_state_name(state), sci_rnc->suspend_type,
|
sci_rnc->destination_state, suspend_reason,
|
suspend_type);
|
|
/* Disable automatic state continuations if explicitly suspending. */
|
if ((suspend_reason == SCI_HW_SUSPEND) ||
|
(sci_rnc->destination_state == RNC_DEST_FINAL))
|
dest_param = sci_rnc->destination_state;
|
|
switch (state) {
|
case SCI_RNC_READY:
|
break;
|
case SCI_RNC_INVALIDATING:
|
if (sci_rnc->destination_state == RNC_DEST_FINAL) {
|
dev_warn(scirdev_to_dev(idev),
|
"%s: already destroying %p\n",
|
__func__, sci_rnc);
|
return SCI_FAILURE_INVALID_STATE;
|
}
|
fallthrough; /* and handle like SCI_RNC_POSTING */
|
case SCI_RNC_RESUMING:
|
fallthrough; /* and handle like SCI_RNC_POSTING */
|
case SCI_RNC_POSTING:
|
/* Set the destination state to AWAIT - this signals the
|
* entry into the SCI_RNC_READY state that a suspension
|
* needs to be done immediately.
|
*/
|
if (sci_rnc->destination_state != RNC_DEST_FINAL)
|
sci_rnc->destination_state = RNC_DEST_SUSPENDED;
|
sci_rnc->suspend_type = suspend_type;
|
sci_rnc->suspend_reason = suspend_reason;
|
return SCI_SUCCESS;
|
|
case SCI_RNC_TX_SUSPENDED:
|
if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX)
|
status = SCI_SUCCESS;
|
break;
|
case SCI_RNC_TX_RX_SUSPENDED:
|
if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX)
|
status = SCI_SUCCESS;
|
break;
|
case SCI_RNC_AWAIT_SUSPENSION:
|
if ((sci_rnc->suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX)
|
|| (suspend_type == sci_rnc->suspend_type))
|
return SCI_SUCCESS;
|
break;
|
default:
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: invalid state %s\n", __func__,
|
rnc_state_name(state));
|
return SCI_FAILURE_INVALID_STATE;
|
}
|
sci_rnc->destination_state = dest_param;
|
sci_rnc->suspend_type = suspend_type;
|
sci_rnc->suspend_reason = suspend_reason;
|
|
if (status == SCI_SUCCESS) { /* Already in the destination state? */
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
wake_up_all(&ihost->eventq); /* Let observers look. */
|
return SCI_SUCCESS;
|
}
|
if ((suspend_reason == SCI_SW_SUSPEND_NORMAL) ||
|
(suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT)) {
|
|
if (suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT)
|
isci_dev_set_hang_detection_timeout(idev, 0x00000001);
|
|
sci_remote_device_post_request(
|
idev, SCI_SOFTWARE_SUSPEND_CMD);
|
}
|
if (state != SCI_RNC_AWAIT_SUSPENSION)
|
sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION);
|
|
return SCI_SUCCESS;
|
}
|
|
enum sci_status sci_remote_node_context_resume(struct sci_remote_node_context *sci_rnc,
|
scics_sds_remote_node_context_callback cb_fn,
|
void *cb_p)
|
{
|
enum scis_sds_remote_node_context_states state;
|
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
|
|
state = sci_rnc->sm.current_state_id;
|
dev_dbg(scirdev_to_dev(idev),
|
"%s: state %s, cb_fn = %p, cb_p = %p; dest_state = %d; "
|
"dev resume path %s\n",
|
__func__, rnc_state_name(state), cb_fn, cb_p,
|
sci_rnc->destination_state,
|
test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)
|
? "<abort active>" : "<normal>");
|
|
switch (state) {
|
case SCI_RNC_INITIAL:
|
if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
|
return SCI_FAILURE_INVALID_STATE;
|
|
sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p,
|
RNC_DEST_READY);
|
if (!test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)) {
|
sci_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:
|
/* We are still waiting to post when a resume was
|
* requested.
|
*/
|
switch (sci_rnc->destination_state) {
|
case RNC_DEST_SUSPENDED:
|
case RNC_DEST_SUSPENDED_RESUME:
|
/* Previously waiting to suspend after posting.
|
* Now continue onto resumption.
|
*/
|
sci_remote_node_context_setup_to_resume(
|
sci_rnc, cb_fn, cb_p,
|
RNC_DEST_SUSPENDED_RESUME);
|
break;
|
default:
|
sci_remote_node_context_setup_to_resume(
|
sci_rnc, cb_fn, cb_p,
|
RNC_DEST_READY);
|
break;
|
}
|
return SCI_SUCCESS;
|
|
case SCI_RNC_TX_SUSPENDED:
|
case SCI_RNC_TX_RX_SUSPENDED:
|
{
|
struct domain_device *dev = idev->domain_dev;
|
/* If this is an expander attached SATA device we must
|
* invalidate and repost the RNC since this is the only
|
* way to clear the TCi to NCQ tag mapping table for
|
* the RNi. All other device types we can just resume.
|
*/
|
sci_remote_node_context_setup_to_resume(
|
sci_rnc, cb_fn, cb_p, RNC_DEST_READY);
|
|
if (!test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)) {
|
if ((dev_is_sata(dev) && dev->parent) ||
|
(sci_rnc->destination_state == RNC_DEST_FINAL))
|
sci_change_state(&sci_rnc->sm,
|
SCI_RNC_INVALIDATING);
|
else
|
sci_change_state(&sci_rnc->sm,
|
SCI_RNC_RESUMING);
|
}
|
}
|
return SCI_SUCCESS;
|
|
case SCI_RNC_AWAIT_SUSPENSION:
|
sci_remote_node_context_setup_to_resume(
|
sci_rnc, cb_fn, cb_p, RNC_DEST_SUSPENDED_RESUME);
|
return SCI_SUCCESS;
|
default:
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: invalid state %s\n", __func__,
|
rnc_state_name(state));
|
return SCI_FAILURE_INVALID_STATE;
|
}
|
}
|
|
enum sci_status sci_remote_node_context_start_io(struct sci_remote_node_context *sci_rnc,
|
struct isci_request *ireq)
|
{
|
enum scis_sds_remote_node_context_states state;
|
|
state = sci_rnc->sm.current_state_id;
|
|
switch (state) {
|
case SCI_RNC_READY:
|
return SCI_SUCCESS;
|
case SCI_RNC_TX_SUSPENDED:
|
case SCI_RNC_TX_RX_SUSPENDED:
|
case SCI_RNC_AWAIT_SUSPENSION:
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: invalid state %s\n", __func__,
|
rnc_state_name(state));
|
return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED;
|
default:
|
dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: invalid state %s\n", __func__,
|
rnc_state_name(state));
|
return SCI_FAILURE_INVALID_STATE;
|
}
|
}
|
|
enum sci_status sci_remote_node_context_start_task(
|
struct sci_remote_node_context *sci_rnc,
|
struct isci_request *ireq,
|
scics_sds_remote_node_context_callback cb_fn,
|
void *cb_p)
|
{
|
enum sci_status status = sci_remote_node_context_resume(sci_rnc,
|
cb_fn, cb_p);
|
if (status != SCI_SUCCESS)
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: resume failed: %d\n", __func__, status);
|
return status;
|
}
|
|
int sci_remote_node_context_is_safe_to_abort(
|
struct sci_remote_node_context *sci_rnc)
|
{
|
enum scis_sds_remote_node_context_states state;
|
|
state = sci_rnc->sm.current_state_id;
|
switch (state) {
|
case SCI_RNC_INVALIDATING:
|
case SCI_RNC_TX_RX_SUSPENDED:
|
return 1;
|
case SCI_RNC_POSTING:
|
case SCI_RNC_RESUMING:
|
case SCI_RNC_READY:
|
case SCI_RNC_TX_SUSPENDED:
|
case SCI_RNC_AWAIT_SUSPENSION:
|
case SCI_RNC_INITIAL:
|
return 0;
|
default:
|
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
|
"%s: invalid state %d\n", __func__, state);
|
return 0;
|
}
|
}
|
