2011-07-03 13:56:22 +08:00
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/*
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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 <linux/completion.h>
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2011-03-10 13:27:46 +08:00
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#include <linux/irqflags.h>
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2011-07-03 13:56:22 +08:00
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#include "scic_task_request.h"
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#include "scic_remote_device.h"
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#include "scic_io_request.h"
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#include "scic_sds_remote_device.h"
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#include "scic_sds_remote_node_context.h"
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#include "isci.h"
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#include "request.h"
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#include "sata.h"
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#include "task.h"
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2011-03-10 13:27:46 +08:00
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/**
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2011-03-12 02:13:51 +08:00
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* isci_task_refuse() - complete the request to the upper layer driver in
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* the case where an I/O needs to be completed back in the submit path.
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* @ihost: host on which the the request was queued
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* @task: request to complete
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* @response: response code for the completed task.
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* @status: status code for the completed task.
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2011-03-10 13:27:46 +08:00
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*
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*/
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2011-03-12 02:13:51 +08:00
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static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task,
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enum service_response response,
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enum exec_status status)
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2011-03-10 13:27:46 +08:00
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{
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2011-03-12 02:13:51 +08:00
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enum isci_completion_selection disposition;
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2011-03-10 13:27:46 +08:00
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2011-03-12 02:13:51 +08:00
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disposition = isci_perform_normal_io_completion;
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disposition = isci_task_set_completion_status(task, response, status,
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disposition);
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2011-03-10 13:27:46 +08:00
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/* Tasks aborted specifically by a call to the lldd_abort_task
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2011-03-12 02:13:51 +08:00
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* function should not be completed to the host in the regular path.
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*/
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switch (disposition) {
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2011-03-10 13:27:46 +08:00
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case isci_perform_normal_io_completion:
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/* Normal notification (task_done) */
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2011-03-12 02:13:51 +08:00
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dev_dbg(&ihost->pdev->dev,
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2011-04-01 04:10:40 +08:00
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"%s: Normal - task = %p, response=%d, "
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"status=%d\n",
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2011-03-10 13:27:46 +08:00
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__func__, task, response, status);
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2011-03-12 02:13:51 +08:00
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task->lldd_task = NULL;
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2011-03-10 13:27:46 +08:00
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2011-04-01 04:10:40 +08:00
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isci_execpath_callback(ihost, task, task->task_done);
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2011-03-10 13:27:46 +08:00
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break;
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case isci_perform_aborted_io_completion:
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/* No notification because this request is already in the
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* abort path.
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*/
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2011-03-12 02:13:51 +08:00
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dev_warn(&ihost->pdev->dev,
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2011-04-01 04:10:40 +08:00
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"%s: Aborted - task = %p, response=%d, "
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"status=%d\n",
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2011-03-10 13:27:46 +08:00
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__func__, task, response, status);
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break;
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case isci_perform_error_io_completion:
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/* Use sas_task_abort */
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2011-03-12 02:13:51 +08:00
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dev_warn(&ihost->pdev->dev,
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2011-04-01 04:10:40 +08:00
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"%s: Error - task = %p, response=%d, "
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"status=%d\n",
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2011-03-10 13:27:46 +08:00
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__func__, task, response, status);
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2011-04-01 04:10:40 +08:00
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isci_execpath_callback(ihost, task, sas_task_abort);
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2011-03-10 13:27:46 +08:00
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break;
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default:
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2011-03-12 02:13:51 +08:00
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dev_warn(&ihost->pdev->dev,
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2011-03-10 13:27:46 +08:00
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"%s: isci task notification default case!",
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__func__);
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sas_task_abort(task);
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break;
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}
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}
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2011-07-03 13:56:22 +08:00
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2011-03-12 02:13:51 +08:00
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#define for_each_sas_task(num, task) \
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for (; num > 0; num--,\
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task = list_entry(task->list.next, struct sas_task, list))
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2011-07-03 13:56:22 +08:00
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/**
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* isci_task_execute_task() - This function is one of the SAS Domain Template
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* functions. This function is called by libsas to send a task down to
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* hardware.
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* @task: This parameter specifies the SAS task to send.
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* @num: This parameter specifies the number of tasks to queue.
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* @gfp_flags: This parameter specifies the context of this call.
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*
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* status, zero indicates success.
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*/
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int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags)
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{
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2011-04-01 04:10:44 +08:00
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struct isci_host *ihost = dev_to_ihost(task->dev);
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2011-07-03 13:56:22 +08:00
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struct isci_request *request = NULL;
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struct isci_remote_device *device;
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unsigned long flags;
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int ret;
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enum sci_status status;
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2011-03-09 10:22:07 +08:00
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enum isci_status device_status;
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2011-07-03 13:56:22 +08:00
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2011-03-12 02:13:51 +08:00
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dev_dbg(&ihost->pdev->dev, "%s: num=%d\n", __func__, num);
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2011-07-03 13:56:22 +08:00
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/* Check if we have room for more tasks */
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2011-03-12 02:13:51 +08:00
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ret = isci_host_can_queue(ihost, num);
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2011-07-03 13:56:22 +08:00
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if (ret) {
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2011-03-12 02:13:51 +08:00
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dev_warn(&ihost->pdev->dev, "%s: queue full\n", __func__);
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2011-07-03 13:56:22 +08:00
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return ret;
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}
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2011-03-12 02:13:51 +08:00
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for_each_sas_task(num, task) {
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dev_dbg(&ihost->pdev->dev,
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2011-07-03 13:56:22 +08:00
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"task = %p, num = %d; dev = %p; cmd = %p\n",
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task, num, task->dev, task->uldd_task);
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2011-04-01 04:10:44 +08:00
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device = task->dev->lldd_dev;
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2011-07-03 13:56:22 +08:00
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2011-03-09 10:22:07 +08:00
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if (device)
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device_status = device->status;
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else
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device_status = isci_freed;
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/* From this point onward, any process that needs to guarantee
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* that there is no kernel I/O being started will have to wait
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* for the quiesce spinlock.
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*/
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if (device_status != isci_ready_for_io) {
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2011-07-03 13:56:22 +08:00
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/* Forces a retry from scsi mid layer. */
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2011-03-12 02:13:51 +08:00
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dev_warn(&ihost->pdev->dev,
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2011-07-03 13:56:22 +08:00
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"%s: task %p: isci_host->status = %d, "
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2011-03-09 10:22:07 +08:00
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"device = %p; device_status = 0x%x\n\n",
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2011-07-03 13:56:22 +08:00
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__func__,
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task,
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2011-03-12 02:13:51 +08:00
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isci_host_get_state(ihost),
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2011-03-09 10:22:07 +08:00
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device, device_status);
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2011-07-03 13:56:22 +08:00
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2011-03-09 10:22:07 +08:00
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if (device_status == isci_ready) {
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/* Indicate QUEUE_FULL so that the scsi midlayer
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* retries.
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*/
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2011-03-12 02:13:51 +08:00
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isci_task_refuse(ihost, task,
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SAS_TASK_COMPLETE,
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SAS_QUEUE_FULL);
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2011-03-09 10:22:07 +08:00
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} else {
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/* Else, the device is going down. */
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2011-03-12 02:13:51 +08:00
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isci_task_refuse(ihost, task,
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SAS_TASK_UNDELIVERED,
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SAS_DEVICE_UNKNOWN);
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2011-03-09 10:22:07 +08:00
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}
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2011-03-12 02:13:51 +08:00
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isci_host_can_dequeue(ihost, 1);
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2011-03-09 10:22:07 +08:00
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} else {
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/* There is a device and it's ready for I/O. */
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spin_lock_irqsave(&task->task_state_lock, flags);
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2011-07-03 13:56:22 +08:00
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2011-03-09 10:22:07 +08:00
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if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
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2011-07-03 13:56:22 +08:00
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2011-03-09 10:22:07 +08:00
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spin_unlock_irqrestore(&task->task_state_lock,
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flags);
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2011-07-03 13:56:22 +08:00
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2011-03-12 02:13:51 +08:00
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isci_task_refuse(ihost, task,
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SAS_TASK_UNDELIVERED,
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SAM_STAT_TASK_ABORTED);
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2011-07-03 13:56:22 +08:00
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2011-03-09 10:22:07 +08:00
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/* The I/O was aborted. */
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2011-07-03 13:56:22 +08:00
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2011-03-09 10:22:07 +08:00
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} else {
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2011-07-03 13:56:22 +08:00
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task->task_state_flags |= SAS_TASK_AT_INITIATOR;
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spin_unlock_irqrestore(&task->task_state_lock, flags);
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2011-03-09 10:22:07 +08:00
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/* build and send the request. */
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2011-03-12 02:13:51 +08:00
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status = isci_request_execute(ihost, task, &request,
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2011-03-09 10:22:07 +08:00
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gfp_flags);
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if (status != SCI_SUCCESS) {
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spin_lock_irqsave(&task->task_state_lock, flags);
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/* Did not really start this command. */
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task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
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spin_unlock_irqrestore(&task->task_state_lock, flags);
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/* Indicate QUEUE_FULL so that the scsi
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* midlayer retries. if the request
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* failed for remote device reasons,
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* it gets returned as
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* SAS_TASK_UNDELIVERED next time
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* through.
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*/
|
2011-03-12 02:13:51 +08:00
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isci_task_refuse(ihost, task,
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SAS_TASK_COMPLETE,
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SAS_QUEUE_FULL);
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isci_host_can_dequeue(ihost, 1);
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2011-03-09 10:22:07 +08:00
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}
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2011-07-03 13:56:22 +08:00
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}
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}
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2011-03-12 02:13:51 +08:00
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}
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2011-07-03 13:56:22 +08:00
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return 0;
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}
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/**
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* isci_task_request_build() - This function builds the task request object.
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* @isci_host: This parameter specifies the ISCI host object
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* @request: This parameter points to the isci_request object allocated in the
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* request construct function.
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* @tmf: This parameter is the task management struct to be built
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*
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* SCI_SUCCESS on successfull completion, or specific failure code.
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*/
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static enum sci_status isci_task_request_build(
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struct isci_host *isci_host,
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struct isci_request **isci_request,
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struct isci_tmf *isci_tmf)
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{
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struct scic_sds_remote_device *sci_device;
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enum sci_status status = SCI_FAILURE;
|
2011-04-13 08:28:43 +08:00
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struct isci_request *request = NULL;
|
2011-07-03 13:56:22 +08:00
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struct isci_remote_device *isci_device;
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/* struct sci_sas_identify_address_frame_protocols dev_protocols; */
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struct smp_discover_response_protocols dev_protocols;
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_tmf = %p\n", __func__, isci_tmf);
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isci_device = isci_tmf->device;
|
2011-03-05 03:51:43 +08:00
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sci_device = to_sci_dev(isci_device);
|
2011-07-03 13:56:22 +08:00
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/* do common allocation and init of request object. */
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status = isci_request_alloc_tmf(
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isci_host,
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isci_tmf,
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&request,
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isci_device,
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|
GFP_ATOMIC
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);
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|
if (status != SCI_SUCCESS)
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|
goto out;
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|
/* let the core do it's construct. */
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|
|
status = scic_task_request_construct(
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|
|
isci_host->core_controller,
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|
sci_device,
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|
SCI_CONTROLLER_INVALID_IO_TAG,
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request,
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request->sci_request_mem_ptr,
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|
|
&request->sci_request_handle
|
|
|
|
);
|
|
|
|
|
|
|
|
if (status != SCI_SUCCESS) {
|
|
|
|
dev_warn(&isci_host->pdev->dev,
|
|
|
|
"%s: scic_task_request_construct failed - "
|
|
|
|
"status = 0x%x\n",
|
|
|
|
__func__,
|
|
|
|
status);
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
sci_object_set_association(
|
|
|
|
request->sci_request_handle,
|
|
|
|
request
|
|
|
|
);
|
|
|
|
|
|
|
|
scic_remote_device_get_protocols(
|
|
|
|
sci_device,
|
|
|
|
&dev_protocols
|
|
|
|
);
|
|
|
|
|
|
|
|
/* let the core do it's protocol
|
|
|
|
* specific construction.
|
|
|
|
*/
|
|
|
|
if (dev_protocols.u.bits.attached_ssp_target) {
|
|
|
|
|
|
|
|
isci_tmf->proto = SAS_PROTOCOL_SSP;
|
|
|
|
status = scic_task_request_construct_ssp(
|
|
|
|
request->sci_request_handle
|
|
|
|
);
|
|
|
|
if (status != SCI_SUCCESS)
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dev_protocols.u.bits.attached_stp_target) {
|
|
|
|
|
|
|
|
isci_tmf->proto = SAS_PROTOCOL_SATA;
|
|
|
|
status = isci_sata_management_task_request_build(request);
|
|
|
|
|
|
|
|
if (status != SCI_SUCCESS)
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
errout:
|
|
|
|
|
|
|
|
/* release the dma memory if we fail. */
|
|
|
|
isci_request_free(isci_host, request);
|
|
|
|
request = NULL;
|
|
|
|
|
|
|
|
out:
|
|
|
|
*isci_request = request;
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_tmf_timeout_cb() - This function is called as a kernel callback when
|
|
|
|
* the timeout period for the TMF has expired.
|
|
|
|
*
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static void isci_tmf_timeout_cb(void *tmf_request_arg)
|
|
|
|
{
|
|
|
|
struct isci_request *request = (struct isci_request *)tmf_request_arg;
|
|
|
|
struct isci_tmf *tmf = isci_request_access_tmf(request);
|
|
|
|
enum sci_status status;
|
|
|
|
|
|
|
|
/* This task management request has timed-out. Terminate the request
|
|
|
|
* so that the request eventually completes to the requestor in the
|
|
|
|
* request completion callback path.
|
|
|
|
*/
|
|
|
|
/* Note - the timer callback function itself has provided spinlock
|
|
|
|
* exclusion from the start and completion paths. No need to take
|
|
|
|
* the request->isci_host->scic_lock here.
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (tmf->timeout_timer != NULL) {
|
|
|
|
/* Call the users callback, if any. */
|
|
|
|
if (tmf->cb_state_func != NULL)
|
|
|
|
tmf->cb_state_func(isci_tmf_timed_out, tmf,
|
|
|
|
tmf->cb_data);
|
|
|
|
|
|
|
|
/* Terminate the TMF transmit request. */
|
|
|
|
status = scic_controller_terminate_request(
|
|
|
|
request->isci_host->core_controller,
|
2011-03-05 03:51:43 +08:00
|
|
|
to_sci_dev(request->isci_device),
|
2011-07-03 13:56:22 +08:00
|
|
|
request->sci_request_handle
|
|
|
|
);
|
|
|
|
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
|
|
"%s: tmf_request = %p; tmf = %p; status = %d\n",
|
|
|
|
__func__, request, tmf, status);
|
|
|
|
} else
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
|
|
"%s: timer already canceled! "
|
|
|
|
"tmf_request = %p; tmf = %p\n",
|
|
|
|
__func__, request, tmf);
|
|
|
|
|
|
|
|
/* No need to unlock since the caller to this callback is doing it for
|
|
|
|
* us.
|
|
|
|
* request->isci_host->scic_lock
|
|
|
|
*/
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_execute_tmf() - This function builds and sends a task request,
|
|
|
|
* then waits for the completion.
|
|
|
|
* @isci_host: This parameter specifies the ISCI host object
|
|
|
|
* @tmf: This parameter is the pointer to the task management structure for
|
|
|
|
* this request.
|
|
|
|
* @timeout_ms: This parameter specifies the timeout period for the task
|
|
|
|
* management request.
|
|
|
|
*
|
|
|
|
* TMF_RESP_FUNC_COMPLETE on successful completion of the TMF (this includes
|
|
|
|
* error conditions reported in the IU status), or TMF_RESP_FUNC_FAILED.
|
|
|
|
*/
|
|
|
|
int isci_task_execute_tmf(
|
|
|
|
struct isci_host *isci_host,
|
|
|
|
struct isci_tmf *tmf,
|
|
|
|
unsigned long timeout_ms)
|
|
|
|
{
|
|
|
|
DECLARE_COMPLETION_ONSTACK(completion);
|
2011-04-13 08:28:41 +08:00
|
|
|
enum sci_task_status status = SCI_TASK_FAILURE;
|
2011-07-03 13:56:22 +08:00
|
|
|
struct scic_sds_remote_device *sci_device;
|
|
|
|
struct isci_remote_device *isci_device = tmf->device;
|
|
|
|
struct isci_request *request;
|
|
|
|
int ret = TMF_RESP_FUNC_FAILED;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
/* sanity check, return TMF_RESP_FUNC_FAILED
|
|
|
|
* if the device is not there and ready.
|
|
|
|
*/
|
2011-03-08 06:47:35 +08:00
|
|
|
if (!isci_device || isci_device->status != isci_ready_for_io) {
|
2011-07-03 13:56:22 +08:00
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: isci_device = %p not ready (%d)\n",
|
|
|
|
__func__,
|
2011-03-08 06:47:35 +08:00
|
|
|
isci_device, isci_device->status);
|
2011-07-03 13:56:22 +08:00
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
} else
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: isci_device = %p\n",
|
|
|
|
__func__, isci_device);
|
|
|
|
|
2011-03-05 03:51:43 +08:00
|
|
|
sci_device = to_sci_dev(isci_device);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* Assign the pointer to the TMF's completion kernel wait structure. */
|
|
|
|
tmf->complete = &completion;
|
|
|
|
|
|
|
|
isci_task_request_build(
|
|
|
|
isci_host,
|
|
|
|
&request,
|
|
|
|
tmf
|
|
|
|
);
|
|
|
|
|
|
|
|
if (!request) {
|
|
|
|
dev_warn(&isci_host->pdev->dev,
|
|
|
|
"%s: isci_task_request_build failed\n",
|
|
|
|
__func__);
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Allocate the TMF timeout timer. */
|
|
|
|
spin_lock_irqsave(&isci_host->scic_lock, flags);
|
2011-03-03 03:49:26 +08:00
|
|
|
tmf->timeout_timer = isci_timer_create(isci_host, request, isci_tmf_timeout_cb);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* Start the timer. */
|
|
|
|
if (tmf->timeout_timer)
|
|
|
|
isci_timer_start(tmf->timeout_timer, timeout_ms);
|
|
|
|
else
|
|
|
|
dev_warn(&isci_host->pdev->dev,
|
|
|
|
"%s: isci_timer_create failed!!!!\n",
|
|
|
|
__func__);
|
|
|
|
|
|
|
|
/* start the TMF io. */
|
|
|
|
status = scic_controller_start_task(
|
|
|
|
isci_host->core_controller,
|
|
|
|
sci_device,
|
|
|
|
request->sci_request_handle,
|
|
|
|
SCI_CONTROLLER_INVALID_IO_TAG
|
|
|
|
);
|
|
|
|
|
2011-04-13 08:28:41 +08:00
|
|
|
if (status != SCI_TASK_SUCCESS) {
|
2011-07-03 13:56:22 +08:00
|
|
|
dev_warn(&isci_host->pdev->dev,
|
|
|
|
"%s: start_io failed - status = 0x%x, request = %p\n",
|
|
|
|
__func__,
|
|
|
|
status,
|
|
|
|
request);
|
|
|
|
goto cleanup_request;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Call the users callback, if any. */
|
|
|
|
if (tmf->cb_state_func != NULL)
|
|
|
|
tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data);
|
|
|
|
|
|
|
|
/* Change the state of the TMF-bearing request to "started". */
|
|
|
|
isci_request_change_state(request, started);
|
|
|
|
|
|
|
|
/* add the request to the remote device request list. */
|
|
|
|
list_add(&request->dev_node, &isci_device->reqs_in_process);
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
|
|
|
|
|
|
|
/* Wait for the TMF to complete, or a timeout. */
|
|
|
|
wait_for_completion(&completion);
|
|
|
|
|
|
|
|
isci_print_tmf(tmf);
|
|
|
|
|
|
|
|
if (tmf->status == SCI_SUCCESS)
|
|
|
|
ret = TMF_RESP_FUNC_COMPLETE;
|
|
|
|
else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) {
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: tmf.status == "
|
|
|
|
"SCI_FAILURE_IO_RESPONSE_VALID\n",
|
|
|
|
__func__);
|
|
|
|
ret = TMF_RESP_FUNC_COMPLETE;
|
|
|
|
}
|
|
|
|
/* Else - leave the default "failed" status alone. */
|
|
|
|
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: completed request = %p\n",
|
|
|
|
__func__,
|
|
|
|
request);
|
|
|
|
|
|
|
|
if (request->io_request_completion != NULL) {
|
|
|
|
|
|
|
|
/* The fact that this is non-NULL for a TMF request
|
|
|
|
* means there is a thread waiting for this TMF to
|
|
|
|
* finish.
|
|
|
|
*/
|
|
|
|
complete(request->io_request_completion);
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_irqsave(&isci_host->scic_lock, flags);
|
|
|
|
|
|
|
|
cleanup_request:
|
|
|
|
|
|
|
|
/* Clean up the timer if needed. */
|
|
|
|
if (tmf->timeout_timer) {
|
2011-03-03 03:49:26 +08:00
|
|
|
isci_del_timer(isci_host, tmf->timeout_timer);
|
2011-07-03 13:56:22 +08:00
|
|
|
tmf->timeout_timer = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
|
|
|
|
|
|
|
isci_request_free(isci_host, request);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void isci_task_build_tmf(
|
|
|
|
struct isci_tmf *tmf,
|
|
|
|
struct isci_remote_device *isci_device,
|
|
|
|
enum isci_tmf_function_codes code,
|
|
|
|
void (*tmf_sent_cb)(enum isci_tmf_cb_state,
|
|
|
|
struct isci_tmf *,
|
|
|
|
void *),
|
2011-03-05 06:06:56 +08:00
|
|
|
void *cb_data)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
|
|
|
dev_dbg(&isci_device->isci_port->isci_host->pdev->dev,
|
|
|
|
"%s: isci_device = %p\n", __func__, isci_device);
|
|
|
|
|
|
|
|
memset(tmf, 0, sizeof(*tmf));
|
|
|
|
|
|
|
|
tmf->device = isci_device;
|
|
|
|
tmf->tmf_code = code;
|
|
|
|
tmf->timeout_timer = NULL;
|
|
|
|
tmf->cb_state_func = tmf_sent_cb;
|
2011-03-05 06:06:56 +08:00
|
|
|
tmf->cb_data = cb_data;
|
|
|
|
}
|
2011-03-05 06:06:46 +08:00
|
|
|
|
2011-03-27 07:43:01 +08:00
|
|
|
static void isci_task_build_abort_task_tmf(
|
2011-03-05 06:06:56 +08:00
|
|
|
struct isci_tmf *tmf,
|
|
|
|
struct isci_remote_device *isci_device,
|
|
|
|
enum isci_tmf_function_codes code,
|
|
|
|
void (*tmf_sent_cb)(enum isci_tmf_cb_state,
|
|
|
|
struct isci_tmf *,
|
|
|
|
void *),
|
|
|
|
struct isci_request *old_request)
|
|
|
|
{
|
|
|
|
isci_task_build_tmf(tmf, isci_device, code, tmf_sent_cb,
|
|
|
|
(void *)old_request);
|
|
|
|
tmf->io_tag = old_request->io_tag;
|
2011-07-03 13:56:22 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct isci_request *isci_task_get_request_from_task(
|
|
|
|
struct sas_task *task,
|
|
|
|
struct isci_remote_device **isci_device)
|
|
|
|
{
|
|
|
|
|
|
|
|
struct isci_request *request = NULL;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&task->task_state_lock, flags);
|
|
|
|
|
|
|
|
request = task->lldd_task;
|
|
|
|
|
|
|
|
/* If task is already done, the request isn't valid */
|
|
|
|
if (!(task->task_state_flags & SAS_TASK_STATE_DONE) &&
|
|
|
|
(task->task_state_flags & SAS_TASK_AT_INITIATOR) &&
|
|
|
|
(request != NULL)) {
|
|
|
|
|
|
|
|
if (isci_device != NULL)
|
|
|
|
*isci_device = request->isci_device;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
|
|
|
|
|
|
return request;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_validate_request_to_abort() - This function checks the given I/O
|
|
|
|
* against the "started" state. If the request is still "started", it's
|
|
|
|
* state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD
|
|
|
|
* BEFORE CALLING THIS FUNCTION.
|
|
|
|
* @isci_request: This parameter specifies the request object to control.
|
|
|
|
* @isci_host: This parameter specifies the ISCI host object
|
|
|
|
* @isci_device: This is the device to which the request is pending.
|
|
|
|
* @aborted_io_completion: This is a completion structure that will be added to
|
|
|
|
* the request in case it is changed to aborting; this completion is
|
|
|
|
* triggered when the request is fully completed.
|
|
|
|
*
|
|
|
|
* Either "started" on successful change of the task status to "aborted", or
|
|
|
|
* "unallocated" if the task cannot be controlled.
|
|
|
|
*/
|
|
|
|
static enum isci_request_status isci_task_validate_request_to_abort(
|
|
|
|
struct isci_request *isci_request,
|
|
|
|
struct isci_host *isci_host,
|
|
|
|
struct isci_remote_device *isci_device,
|
|
|
|
struct completion *aborted_io_completion)
|
|
|
|
{
|
|
|
|
enum isci_request_status old_state = unallocated;
|
|
|
|
|
|
|
|
/* Only abort the task if it's in the
|
|
|
|
* device's request_in_process list
|
|
|
|
*/
|
|
|
|
if (isci_request && !list_empty(&isci_request->dev_node)) {
|
|
|
|
old_state = isci_request_change_started_to_aborted(
|
|
|
|
isci_request, aborted_io_completion);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
return old_state;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void isci_request_cleanup_completed_loiterer(
|
|
|
|
struct isci_host *isci_host,
|
|
|
|
struct isci_remote_device *isci_device,
|
|
|
|
struct isci_request *isci_request)
|
|
|
|
{
|
2011-03-05 06:06:38 +08:00
|
|
|
struct sas_task *task;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
task = (isci_request->ttype == io_task)
|
|
|
|
? isci_request_access_task(isci_request)
|
|
|
|
: NULL;
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: isci_device=%p, request=%p, task=%p\n",
|
2011-03-05 06:06:38 +08:00
|
|
|
__func__, isci_device, isci_request, task);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
spin_lock_irqsave(&isci_host->scic_lock, flags);
|
|
|
|
list_del_init(&isci_request->dev_node);
|
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
if (task != NULL) {
|
|
|
|
|
|
|
|
spin_lock_irqsave(&task->task_state_lock, flags);
|
|
|
|
task->lldd_task = NULL;
|
|
|
|
|
|
|
|
isci_set_task_doneflags(task);
|
|
|
|
|
|
|
|
/* If this task is not in the abort path, call task_done. */
|
|
|
|
if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
|
|
task->task_done(task);
|
|
|
|
} else
|
|
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
|
|
}
|
2011-07-03 13:56:22 +08:00
|
|
|
isci_request_free(isci_host, isci_request);
|
|
|
|
}
|
2011-03-05 06:06:52 +08:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @isci_termination_timed_out(): this function will deal with a request for
|
|
|
|
* which the wait for termination has timed-out.
|
|
|
|
*
|
|
|
|
* @isci_host This SCU.
|
|
|
|
* @isci_request The I/O request being terminated.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
isci_termination_timed_out(
|
|
|
|
struct isci_host * host,
|
|
|
|
struct isci_request * request
|
|
|
|
)
|
|
|
|
{
|
|
|
|
unsigned long state_flags;
|
|
|
|
|
|
|
|
dev_warn(&host->pdev->dev,
|
|
|
|
"%s: host = %p; request = %p\n",
|
|
|
|
__func__, host, request);
|
|
|
|
|
|
|
|
/* At this point, the request to terminate
|
|
|
|
* has timed out. The best we can do is to
|
|
|
|
* have the request die a silent death
|
|
|
|
* if it ever completes.
|
|
|
|
*/
|
|
|
|
spin_lock_irqsave(&request->state_lock, state_flags);
|
|
|
|
|
|
|
|
if (request->status == started) {
|
|
|
|
|
|
|
|
/* Set the request state to "dead",
|
|
|
|
* and clear the task pointer so that an actual
|
|
|
|
* completion event callback doesn't do
|
|
|
|
* anything.
|
|
|
|
*/
|
|
|
|
request->status = dead;
|
|
|
|
|
|
|
|
/* Clear the timeout completion event pointer.*/
|
|
|
|
request->io_request_completion = NULL;
|
|
|
|
|
|
|
|
if (request->ttype == io_task) {
|
|
|
|
|
|
|
|
/* Break links with the sas_task. */
|
|
|
|
if (request->ttype_ptr.io_task_ptr != NULL) {
|
|
|
|
|
|
|
|
request->ttype_ptr.io_task_ptr->lldd_task = NULL;
|
|
|
|
request->ttype_ptr.io_task_ptr = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&request->state_lock, state_flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
/**
|
|
|
|
* isci_terminate_request_core() - This function will terminate the given
|
|
|
|
* request, and wait for it to complete. This function must only be called
|
|
|
|
* from a thread that can wait. Note that the request is terminated and
|
|
|
|
* completed (back to the host, if started there).
|
|
|
|
* @isci_host: This SCU.
|
|
|
|
* @isci_device: The target.
|
|
|
|
* @isci_request: The I/O request to be terminated.
|
|
|
|
*
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static void isci_terminate_request_core(
|
|
|
|
struct isci_host *isci_host,
|
|
|
|
struct isci_remote_device *isci_device,
|
2011-03-05 06:06:50 +08:00
|
|
|
struct isci_request *isci_request)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
2011-03-05 06:06:50 +08:00
|
|
|
enum sci_status status = SCI_SUCCESS;
|
2011-07-03 13:56:22 +08:00
|
|
|
bool was_terminated = false;
|
|
|
|
bool needs_cleanup_handling = false;
|
|
|
|
enum isci_request_status request_status;
|
|
|
|
unsigned long flags;
|
2011-03-05 06:06:52 +08:00
|
|
|
unsigned long timeout_remaining;
|
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: device = %p; request = %p\n",
|
|
|
|
__func__, isci_device, isci_request);
|
|
|
|
|
|
|
|
spin_lock_irqsave(&isci_host->scic_lock, flags);
|
2011-03-05 06:06:52 +08:00
|
|
|
|
|
|
|
/* Note that we are not going to control
|
|
|
|
* the target to abort the request.
|
|
|
|
*/
|
|
|
|
isci_request->complete_in_target = true;
|
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
/* Make sure the request wasn't just sitting around signalling
|
|
|
|
* device condition (if the request handle is NULL, then the
|
|
|
|
* request completed but needed additional handling here).
|
|
|
|
*/
|
|
|
|
if (isci_request->sci_request_handle != NULL) {
|
|
|
|
was_terminated = true;
|
2011-03-05 06:06:50 +08:00
|
|
|
needs_cleanup_handling = true;
|
2011-07-03 13:56:22 +08:00
|
|
|
status = scic_controller_terminate_request(
|
|
|
|
isci_host->core_controller,
|
2011-03-05 03:51:43 +08:00
|
|
|
to_sci_dev(isci_device),
|
2011-07-03 13:56:22 +08:00
|
|
|
isci_request->sci_request_handle
|
|
|
|
);
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The only time the request to terminate will
|
|
|
|
* fail is when the io request is completed and
|
|
|
|
* being aborted.
|
|
|
|
*/
|
2011-03-05 06:06:52 +08:00
|
|
|
if (status != SCI_SUCCESS) {
|
2011-07-03 13:56:22 +08:00
|
|
|
dev_err(&isci_host->pdev->dev,
|
|
|
|
"%s: scic_controller_terminate_request"
|
|
|
|
" returned = 0x%x\n",
|
|
|
|
__func__,
|
|
|
|
status);
|
2011-03-05 06:06:52 +08:00
|
|
|
/* Clear the completion pointer from the request. */
|
|
|
|
isci_request->io_request_completion = NULL;
|
|
|
|
|
|
|
|
} else {
|
2011-07-03 13:56:22 +08:00
|
|
|
if (was_terminated) {
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: before completion wait (%p)\n",
|
|
|
|
__func__,
|
2011-03-05 06:06:50 +08:00
|
|
|
isci_request->io_request_completion);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* Wait here for the request to complete. */
|
2011-03-05 06:06:52 +08:00
|
|
|
#define TERMINATION_TIMEOUT_MSEC 50
|
|
|
|
timeout_remaining
|
|
|
|
= wait_for_completion_timeout(
|
|
|
|
isci_request->io_request_completion,
|
|
|
|
msecs_to_jiffies(TERMINATION_TIMEOUT_MSEC));
|
|
|
|
|
|
|
|
if (!timeout_remaining) {
|
|
|
|
|
|
|
|
isci_termination_timed_out(isci_host,
|
|
|
|
isci_request);
|
|
|
|
|
|
|
|
dev_err(&isci_host->pdev->dev,
|
|
|
|
"%s: *** Timeout waiting for "
|
|
|
|
"termination(%p/%p)\n",
|
|
|
|
__func__,
|
|
|
|
isci_request->io_request_completion,
|
|
|
|
isci_request);
|
|
|
|
|
|
|
|
} else
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: after completion wait (%p)\n",
|
|
|
|
__func__,
|
|
|
|
isci_request->io_request_completion);
|
|
|
|
}
|
|
|
|
/* Clear the completion pointer from the request. */
|
|
|
|
isci_request->io_request_completion = NULL;
|
|
|
|
|
|
|
|
/* Peek at the status of the request. This will tell
|
|
|
|
* us if there was special handling on the request such that it
|
|
|
|
* needs to be detached and freed here.
|
|
|
|
*/
|
|
|
|
spin_lock_irqsave(&isci_request->state_lock, flags);
|
|
|
|
request_status = isci_request_get_state(isci_request);
|
|
|
|
|
|
|
|
if ((isci_request->ttype == io_task) /* TMFs are in their own thread */
|
|
|
|
&& ((request_status == aborted)
|
|
|
|
|| (request_status == aborting)
|
|
|
|
|| (request_status == terminating)
|
|
|
|
|| (request_status == completed)
|
|
|
|
|| (request_status == dead)
|
|
|
|
)
|
|
|
|
) {
|
|
|
|
|
|
|
|
/* The completion routine won't free a request in
|
|
|
|
* the aborted/aborting/etc. states, so we do
|
|
|
|
* it here.
|
|
|
|
*/
|
|
|
|
needs_cleanup_handling = true;
|
2011-07-03 13:56:22 +08:00
|
|
|
}
|
2011-03-05 06:06:52 +08:00
|
|
|
spin_unlock_irqrestore(&isci_request->state_lock, flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
if (needs_cleanup_handling)
|
|
|
|
isci_request_cleanup_completed_loiterer(
|
|
|
|
isci_host, isci_device, isci_request
|
|
|
|
);
|
|
|
|
}
|
|
|
|
}
|
2011-03-05 06:06:50 +08:00
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
static void isci_terminate_request(
|
|
|
|
struct isci_host *isci_host,
|
|
|
|
struct isci_remote_device *isci_device,
|
|
|
|
struct isci_request *isci_request,
|
|
|
|
enum isci_request_status new_request_state)
|
|
|
|
{
|
|
|
|
enum isci_request_status old_state;
|
|
|
|
DECLARE_COMPLETION_ONSTACK(request_completion);
|
|
|
|
|
|
|
|
/* Change state to "new_request_state" if it is currently "started" */
|
|
|
|
old_state = isci_request_change_started_to_newstate(
|
|
|
|
isci_request,
|
|
|
|
&request_completion,
|
|
|
|
new_request_state
|
|
|
|
);
|
|
|
|
|
2011-04-01 04:10:34 +08:00
|
|
|
if ((old_state == started) ||
|
|
|
|
(old_state == completed) ||
|
|
|
|
(old_state == aborting)) {
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
/* If the old_state is started:
|
|
|
|
* This request was not already being aborted. If it had been,
|
2011-07-03 13:56:22 +08:00
|
|
|
* then the aborting I/O (ie. the TMF request) would not be in
|
|
|
|
* the aborting state, and thus would be terminated here. Note
|
|
|
|
* that since the TMF completion's call to the kernel function
|
|
|
|
* "complete()" does not happen until the pending I/O request
|
|
|
|
* terminate fully completes, we do not have to implement a
|
|
|
|
* special wait here for already aborting requests - the
|
|
|
|
* termination of the TMF request will force the request
|
|
|
|
* to finish it's already started terminate.
|
2011-03-05 06:06:42 +08:00
|
|
|
*
|
|
|
|
* If old_state == completed:
|
|
|
|
* This request completed from the SCU hardware perspective
|
|
|
|
* and now just needs cleaning up in terms of freeing the
|
|
|
|
* request and potentially calling up to libsas.
|
2011-04-01 04:10:34 +08:00
|
|
|
*
|
|
|
|
* If old_state == aborting:
|
|
|
|
* This request has already gone through a TMF timeout, but may
|
|
|
|
* not have been terminated; needs cleaning up at least.
|
2011-07-03 13:56:22 +08:00
|
|
|
*/
|
|
|
|
isci_terminate_request_core(isci_host, isci_device,
|
2011-03-05 06:06:50 +08:00
|
|
|
isci_request);
|
2011-03-05 06:06:42 +08:00
|
|
|
}
|
2011-07-03 13:56:22 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_terminate_pending_requests() - This function will change the all of the
|
|
|
|
* requests on the given device's state to "aborting", will terminate the
|
|
|
|
* requests, and wait for them to complete. This function must only be
|
|
|
|
* called from a thread that can wait. Note that the requests are all
|
|
|
|
* terminated and completed (back to the host, if started there).
|
|
|
|
* @isci_host: This parameter specifies SCU.
|
|
|
|
* @isci_device: This parameter specifies the target.
|
|
|
|
*
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
void isci_terminate_pending_requests(
|
|
|
|
struct isci_host *isci_host,
|
|
|
|
struct isci_remote_device *isci_device,
|
|
|
|
enum isci_request_status new_request_state)
|
|
|
|
{
|
2011-03-05 06:06:52 +08:00
|
|
|
struct isci_request *request;
|
|
|
|
struct isci_request *next_request;
|
|
|
|
unsigned long flags;
|
|
|
|
struct list_head aborted_request_list;
|
|
|
|
|
|
|
|
INIT_LIST_HEAD(&aborted_request_list);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: isci_device = %p (new request state = %d)\n",
|
|
|
|
__func__, isci_device, new_request_state);
|
|
|
|
|
2011-03-05 06:06:52 +08:00
|
|
|
spin_lock_irqsave(&isci_host->scic_lock, flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:52 +08:00
|
|
|
/* Move all of the pending requests off of the device list. */
|
|
|
|
list_splice_init(&isci_device->reqs_in_process,
|
|
|
|
&aborted_request_list);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:52 +08:00
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:52 +08:00
|
|
|
/* Iterate through the now-local list. */
|
|
|
|
list_for_each_entry_safe(request, next_request,
|
|
|
|
&aborted_request_list, dev_node) {
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:52 +08:00
|
|
|
dev_warn(&isci_host->pdev->dev,
|
|
|
|
"%s: isci_device=%p request=%p; task=%p\n",
|
|
|
|
__func__,
|
|
|
|
isci_device, request,
|
|
|
|
((request->ttype == io_task)
|
|
|
|
? isci_request_access_task(request)
|
|
|
|
: NULL));
|
|
|
|
|
|
|
|
/* Mark all still pending I/O with the selected next
|
|
|
|
* state, terminate and free it.
|
|
|
|
*/
|
|
|
|
isci_terminate_request(isci_host, isci_device,
|
|
|
|
request, new_request_state
|
|
|
|
);
|
|
|
|
}
|
2011-07-03 13:56:22 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain
|
|
|
|
* Template functions.
|
|
|
|
* @lun: This parameter specifies the lun to be reset.
|
|
|
|
*
|
|
|
|
* status, zero indicates success.
|
|
|
|
*/
|
|
|
|
static int isci_task_send_lu_reset_sas(
|
|
|
|
struct isci_host *isci_host,
|
|
|
|
struct isci_remote_device *isci_device,
|
|
|
|
u8 *lun)
|
|
|
|
{
|
|
|
|
struct isci_tmf tmf;
|
|
|
|
int ret = TMF_RESP_FUNC_FAILED;
|
|
|
|
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: isci_host = %p, isci_device = %p\n",
|
|
|
|
__func__, isci_host, isci_device);
|
|
|
|
/* Send the LUN reset to the target. By the time the call returns,
|
|
|
|
* the TMF has fully exected in the target (in which case the return
|
|
|
|
* value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or
|
|
|
|
* was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED").
|
|
|
|
*/
|
|
|
|
isci_task_build_tmf(&tmf, isci_device, isci_tmf_ssp_lun_reset, NULL,
|
|
|
|
NULL);
|
|
|
|
|
|
|
|
#define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */
|
|
|
|
ret = isci_task_execute_tmf(isci_host, &tmf, ISCI_LU_RESET_TIMEOUT_MS);
|
|
|
|
|
|
|
|
if (ret == TMF_RESP_FUNC_COMPLETE)
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: %p: TMF_LU_RESET passed\n",
|
|
|
|
__func__, isci_device);
|
|
|
|
else
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: %p: TMF_LU_RESET failed (%x)\n",
|
|
|
|
__func__, isci_device, ret);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_lu_reset() - This function is one of the SAS Domain Template
|
|
|
|
* functions. This is one of the Task Management functoins called by libsas,
|
|
|
|
* to reset the given lun. Note the assumption that while this call is
|
|
|
|
* executing, no I/O will be sent by the host to the device.
|
|
|
|
* @lun: This parameter specifies the lun to be reset.
|
|
|
|
*
|
|
|
|
* status, zero indicates success.
|
|
|
|
*/
|
2011-04-01 04:10:44 +08:00
|
|
|
int isci_task_lu_reset(struct domain_device *domain_device, u8 *lun)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
2011-04-01 04:10:44 +08:00
|
|
|
struct isci_host *isci_host = dev_to_ihost(domain_device);
|
2011-07-03 13:56:22 +08:00
|
|
|
struct isci_remote_device *isci_device = NULL;
|
|
|
|
int ret;
|
|
|
|
bool device_stopping = false;
|
|
|
|
|
2011-04-01 04:10:44 +08:00
|
|
|
isci_device = domain_device->lldd_dev;
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-04-01 04:10:44 +08:00
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
|
2011-07-03 13:56:22 +08:00
|
|
|
__func__, domain_device, isci_host, isci_device);
|
|
|
|
|
|
|
|
if (isci_device != NULL)
|
|
|
|
device_stopping = (isci_device->status == isci_stopping)
|
|
|
|
|| (isci_device->status == isci_stopped);
|
|
|
|
|
|
|
|
/* If there is a device reset pending on any request in the
|
|
|
|
* device's list, fail this LUN reset request in order to
|
|
|
|
* escalate to the device reset.
|
|
|
|
*/
|
2011-04-01 04:10:44 +08:00
|
|
|
if (!isci_device || device_stopping ||
|
|
|
|
isci_device_is_reset_pending(isci_host, isci_device)) {
|
2011-07-03 13:56:22 +08:00
|
|
|
dev_warn(&isci_host->pdev->dev,
|
2011-04-01 04:10:44 +08:00
|
|
|
"%s: No dev (%p), or "
|
2011-07-03 13:56:22 +08:00
|
|
|
"RESET PENDING: domain_device=%p\n",
|
2011-04-01 04:10:44 +08:00
|
|
|
__func__, isci_device, domain_device);
|
2011-07-03 13:56:22 +08:00
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Send the task management part of the reset. */
|
|
|
|
if (sas_protocol_ata(domain_device->tproto)) {
|
2011-04-01 04:10:44 +08:00
|
|
|
ret = isci_task_send_lu_reset_sata(isci_host, isci_device, lun);
|
2011-07-03 13:56:22 +08:00
|
|
|
} else
|
|
|
|
ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun);
|
|
|
|
|
|
|
|
/* If the LUN reset worked, all the I/O can now be terminated. */
|
|
|
|
if (ret == TMF_RESP_FUNC_COMPLETE)
|
|
|
|
/* Terminate all I/O now. */
|
|
|
|
isci_terminate_pending_requests(isci_host,
|
|
|
|
isci_device,
|
|
|
|
terminating);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */
|
|
|
|
int isci_task_clear_nexus_port(struct asd_sas_port *port)
|
|
|
|
{
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
int isci_task_clear_nexus_ha(struct sas_ha_struct *ha)
|
|
|
|
{
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
int isci_task_I_T_nexus_reset(struct domain_device *dev)
|
|
|
|
{
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Task Management Functions. Must be called from process context. */
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_abort_task_process_cb() - This is a helper function for the abort task
|
|
|
|
* TMF command. It manages the request state with respect to the successful
|
|
|
|
* transmission / completion of the abort task request.
|
|
|
|
* @cb_state: This parameter specifies when this function was called - after
|
|
|
|
* the TMF request has been started and after it has timed-out.
|
|
|
|
* @tmf: This parameter specifies the TMF in progress.
|
|
|
|
*
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static void isci_abort_task_process_cb(
|
|
|
|
enum isci_tmf_cb_state cb_state,
|
|
|
|
struct isci_tmf *tmf,
|
|
|
|
void *cb_data)
|
|
|
|
{
|
|
|
|
struct isci_request *old_request;
|
|
|
|
|
|
|
|
old_request = (struct isci_request *)cb_data;
|
|
|
|
|
|
|
|
dev_dbg(&old_request->isci_host->pdev->dev,
|
|
|
|
"%s: tmf=%p, old_request=%p\n",
|
|
|
|
__func__, tmf, old_request);
|
|
|
|
|
|
|
|
switch (cb_state) {
|
|
|
|
|
|
|
|
case isci_tmf_started:
|
|
|
|
/* The TMF has been started. Nothing to do here, since the
|
|
|
|
* request state was already set to "aborted" by the abort
|
|
|
|
* task function.
|
|
|
|
*/
|
2011-04-13 08:28:43 +08:00
|
|
|
if ((old_request->status != aborted)
|
|
|
|
&& (old_request->status != completed))
|
|
|
|
dev_err(&old_request->isci_host->pdev->dev,
|
|
|
|
"%s: Bad request status (%d): tmf=%p, old_request=%p\n",
|
|
|
|
__func__, old_request->status, tmf, old_request);
|
2011-07-03 13:56:22 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
case isci_tmf_timed_out:
|
|
|
|
|
|
|
|
/* Set the task's state to "aborting", since the abort task
|
|
|
|
* function thread set it to "aborted" (above) in anticipation
|
|
|
|
* of the task management request working correctly. Since the
|
|
|
|
* timeout has now fired, the TMF request failed. We set the
|
|
|
|
* state such that the request completion will indicate the
|
|
|
|
* device is no longer present.
|
|
|
|
*/
|
|
|
|
isci_request_change_state(old_request, aborting);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
dev_err(&old_request->isci_host->pdev->dev,
|
|
|
|
"%s: Bad cb_state (%d): tmf=%p, old_request=%p\n",
|
|
|
|
__func__, cb_state, tmf, old_request);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_abort_task() - This function is one of the SAS Domain Template
|
|
|
|
* functions. This function is called by libsas to abort a specified task.
|
|
|
|
* @task: This parameter specifies the SAS task to abort.
|
|
|
|
*
|
|
|
|
* status, zero indicates success.
|
|
|
|
*/
|
|
|
|
int isci_task_abort_task(struct sas_task *task)
|
|
|
|
{
|
2011-04-01 04:10:44 +08:00
|
|
|
struct isci_host *isci_host = dev_to_ihost(task->dev);
|
2011-07-03 13:56:22 +08:00
|
|
|
DECLARE_COMPLETION_ONSTACK(aborted_io_completion);
|
2011-03-05 06:06:42 +08:00
|
|
|
struct isci_request *old_request = NULL;
|
|
|
|
enum isci_request_status old_state;
|
2011-07-03 13:56:22 +08:00
|
|
|
struct isci_remote_device *isci_device = NULL;
|
2011-03-05 06:06:42 +08:00
|
|
|
struct isci_tmf tmf;
|
|
|
|
int ret = TMF_RESP_FUNC_FAILED;
|
|
|
|
unsigned long flags;
|
|
|
|
bool any_dev_reset = false;
|
|
|
|
bool device_stopping;
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* Get the isci_request reference from the task. Note that
|
|
|
|
* this check does not depend on the pending request list
|
|
|
|
* in the device, because tasks driving resets may land here
|
|
|
|
* after completion in the core.
|
|
|
|
*/
|
2011-04-01 04:10:44 +08:00
|
|
|
old_request = isci_task_get_request_from_task(task, &isci_device);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: task = %p\n", __func__, task);
|
|
|
|
|
|
|
|
/* Check if the device has been / is currently being removed.
|
|
|
|
* If so, no task management will be done, and the I/O will
|
|
|
|
* be terminated.
|
|
|
|
*/
|
|
|
|
device_stopping = (isci_device->status == isci_stopping)
|
|
|
|
|| (isci_device->status == isci_stopped);
|
|
|
|
|
|
|
|
/* This version of the driver will fail abort requests for
|
|
|
|
* SATA/STP. Failing the abort request this way will cause the
|
|
|
|
* SCSI error handler thread to escalate to LUN reset
|
|
|
|
*/
|
|
|
|
if (sas_protocol_ata(task->task_proto) && !device_stopping) {
|
|
|
|
dev_warn(&isci_host->pdev->dev,
|
|
|
|
" task %p is for a STP/SATA device;"
|
|
|
|
" returning TMF_RESP_FUNC_FAILED\n"
|
|
|
|
" to cause a LUN reset...\n", task);
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: old_request == %p\n", __func__, old_request);
|
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
if (!device_stopping)
|
|
|
|
any_dev_reset = isci_device_is_reset_pending(isci_host,isci_device);
|
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
spin_lock_irqsave(&task->task_state_lock, flags);
|
|
|
|
|
|
|
|
/* Don't do resets to stopping devices. */
|
2011-03-05 06:06:42 +08:00
|
|
|
if (device_stopping) {
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET;
|
|
|
|
any_dev_reset = false;
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
} else /* See if there is a pending device reset for this device. */
|
2011-07-03 13:56:22 +08:00
|
|
|
any_dev_reset = any_dev_reset
|
2011-03-05 06:06:42 +08:00
|
|
|
|| (task->task_state_flags & SAS_TASK_NEED_DEV_RESET);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* If the extraction of the request reference from the task
|
|
|
|
* failed, then the request has been completed (or if there is a
|
|
|
|
* pending reset then this abort request function must be failed
|
|
|
|
* in order to escalate to the target reset).
|
|
|
|
*/
|
2011-03-05 06:06:42 +08:00
|
|
|
if ((old_request == NULL) || any_dev_reset) {
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* If the device reset task flag is set, fail the task
|
|
|
|
* management request. Otherwise, the original request
|
|
|
|
* has completed.
|
|
|
|
*/
|
|
|
|
if (any_dev_reset) {
|
|
|
|
|
|
|
|
/* Turn off the task's DONE to make sure this
|
|
|
|
* task is escalated to a target reset.
|
|
|
|
*/
|
|
|
|
task->task_state_flags &= ~SAS_TASK_STATE_DONE;
|
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
/* Make the reset happen as soon as possible. */
|
|
|
|
task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
/* Fail the task management request in order to
|
|
|
|
* escalate to the target reset.
|
|
|
|
*/
|
|
|
|
ret = TMF_RESP_FUNC_FAILED;
|
|
|
|
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: Failing task abort in order to "
|
|
|
|
"escalate to target reset because\n"
|
|
|
|
"SAS_TASK_NEED_DEV_RESET is set for "
|
|
|
|
"task %p on dev %p\n",
|
|
|
|
__func__, task, isci_device);
|
|
|
|
|
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
} else {
|
2011-07-03 13:56:22 +08:00
|
|
|
/* The request has already completed and there
|
|
|
|
* is nothing to do here other than to set the task
|
|
|
|
* done bit, and indicate that the task abort function
|
|
|
|
* was sucessful.
|
|
|
|
*/
|
|
|
|
isci_set_task_doneflags(task);
|
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
ret = TMF_RESP_FUNC_COMPLETE;
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: abort task not needed for %p\n",
|
|
|
|
__func__, task);
|
2011-07-03 13:56:22 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2011-03-05 06:06:42 +08:00
|
|
|
else
|
|
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
spin_lock_irqsave(&isci_host->scic_lock, flags);
|
|
|
|
|
2011-04-01 04:10:34 +08:00
|
|
|
/* Check the request status and change to "aborted" if currently
|
2011-03-05 06:06:42 +08:00
|
|
|
* "starting"; if true then set the I/O kernel completion
|
2011-07-03 13:56:22 +08:00
|
|
|
* struct that will be triggered when the request completes.
|
|
|
|
*/
|
2011-03-05 06:06:42 +08:00
|
|
|
old_state = isci_task_validate_request_to_abort(
|
|
|
|
old_request, isci_host, isci_device,
|
|
|
|
&aborted_io_completion);
|
2011-04-01 04:10:34 +08:00
|
|
|
if ((old_state != started) &&
|
|
|
|
(old_state != completed) &&
|
|
|
|
(old_state != aborting)) {
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
/* The request was already being handled by someone else (because
|
|
|
|
* they got to set the state away from started).
|
|
|
|
*/
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: device = %p; old_request %p already being aborted\n",
|
|
|
|
__func__,
|
|
|
|
isci_device, old_request);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
return TMF_RESP_FUNC_COMPLETE;
|
|
|
|
}
|
2011-03-05 06:06:42 +08:00
|
|
|
if ((task->task_proto == SAS_PROTOCOL_SMP)
|
|
|
|
|| device_stopping
|
|
|
|
|| old_request->complete_in_target
|
|
|
|
) {
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: SMP request (%d)"
|
|
|
|
" or device is stopping (%d)"
|
|
|
|
" or complete_in_target (%d), thus no TMF\n",
|
|
|
|
__func__, (task->task_proto == SAS_PROTOCOL_SMP),
|
|
|
|
device_stopping, old_request->complete_in_target);
|
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
/* Set the state on the task. */
|
|
|
|
isci_task_all_done(task);
|
|
|
|
|
|
|
|
ret = TMF_RESP_FUNC_COMPLETE;
|
|
|
|
|
|
|
|
/* Stopping and SMP devices are not sent a TMF, and are not
|
2011-03-05 06:06:42 +08:00
|
|
|
* reset, but the outstanding I/O request is terminated below.
|
2011-07-03 13:56:22 +08:00
|
|
|
*/
|
|
|
|
} else {
|
|
|
|
/* Fill in the tmf stucture */
|
2011-03-05 06:06:56 +08:00
|
|
|
isci_task_build_abort_task_tmf(&tmf, isci_device,
|
|
|
|
isci_tmf_ssp_task_abort,
|
|
|
|
isci_abort_task_process_cb,
|
|
|
|
old_request);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
|
|
|
|
|
|
|
#define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */
|
|
|
|
ret = isci_task_execute_tmf(isci_host, &tmf,
|
|
|
|
ISCI_ABORT_TASK_TIMEOUT_MS);
|
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
if (ret != TMF_RESP_FUNC_COMPLETE)
|
2011-07-03 13:56:22 +08:00
|
|
|
dev_err(&isci_host->pdev->dev,
|
|
|
|
"%s: isci_task_send_tmf failed\n",
|
|
|
|
__func__);
|
|
|
|
}
|
2011-03-05 06:06:42 +08:00
|
|
|
if (ret == TMF_RESP_FUNC_COMPLETE) {
|
|
|
|
old_request->complete_in_target = true;
|
|
|
|
|
|
|
|
/* Clean up the request on our side, and wait for the aborted I/O to
|
|
|
|
* complete.
|
|
|
|
*/
|
2011-03-05 06:06:50 +08:00
|
|
|
isci_terminate_request_core(isci_host, isci_device, old_request);
|
2011-03-05 06:06:42 +08:00
|
|
|
}
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-03-05 06:06:42 +08:00
|
|
|
/* Make sure we do not leave a reference to aborted_io_completion */
|
|
|
|
old_request->io_request_completion = NULL;
|
2011-07-03 13:56:22 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_abort_task_set() - This function is one of the SAS Domain Template
|
|
|
|
* functions. This is one of the Task Management functoins called by libsas,
|
|
|
|
* to abort all task for the given lun.
|
|
|
|
* @d_device: This parameter specifies the domain device associated with this
|
|
|
|
* request.
|
|
|
|
* @lun: This parameter specifies the lun associated with this request.
|
|
|
|
*
|
|
|
|
* status, zero indicates success.
|
|
|
|
*/
|
|
|
|
int isci_task_abort_task_set(
|
|
|
|
struct domain_device *d_device,
|
|
|
|
u8 *lun)
|
|
|
|
{
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_clear_aca() - This function is one of the SAS Domain Template
|
|
|
|
* functions. This is one of the Task Management functoins called by libsas.
|
|
|
|
* @d_device: This parameter specifies the domain device associated with this
|
|
|
|
* request.
|
|
|
|
* @lun: This parameter specifies the lun associated with this request.
|
|
|
|
*
|
|
|
|
* status, zero indicates success.
|
|
|
|
*/
|
|
|
|
int isci_task_clear_aca(
|
|
|
|
struct domain_device *d_device,
|
|
|
|
u8 *lun)
|
|
|
|
{
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_clear_task_set() - This function is one of the SAS Domain Template
|
|
|
|
* functions. This is one of the Task Management functoins called by libsas.
|
|
|
|
* @d_device: This parameter specifies the domain device associated with this
|
|
|
|
* request.
|
|
|
|
* @lun: This parameter specifies the lun associated with this request.
|
|
|
|
*
|
|
|
|
* status, zero indicates success.
|
|
|
|
*/
|
|
|
|
int isci_task_clear_task_set(
|
|
|
|
struct domain_device *d_device,
|
|
|
|
u8 *lun)
|
|
|
|
{
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_query_task() - This function is implemented to cause libsas to
|
|
|
|
* correctly escalate the failed abort to a LUN or target reset (this is
|
|
|
|
* because sas_scsi_find_task libsas function does not correctly interpret
|
|
|
|
* all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is
|
|
|
|
* returned, libsas turns this into a LUN reset; when FUNC_FAILED is
|
|
|
|
* returned, libsas will turn this into a target reset
|
|
|
|
* @task: This parameter specifies the sas task being queried.
|
|
|
|
* @lun: This parameter specifies the lun associated with this request.
|
|
|
|
*
|
|
|
|
* status, zero indicates success.
|
|
|
|
*/
|
|
|
|
int isci_task_query_task(
|
|
|
|
struct sas_task *task)
|
|
|
|
{
|
|
|
|
/* See if there is a pending device reset for this device. */
|
|
|
|
if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET)
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
else
|
|
|
|
return TMF_RESP_FUNC_SUCC;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_request_complete() - This function is called by the sci core when
|
|
|
|
* an task request completes.
|
|
|
|
* @isci_host: This parameter specifies the ISCI host object
|
|
|
|
* @request: This parameter is the completed isci_request object.
|
|
|
|
* @completion_status: This parameter specifies the completion status from the
|
|
|
|
* sci core.
|
|
|
|
*
|
|
|
|
* none.
|
|
|
|
*/
|
|
|
|
void isci_task_request_complete(
|
|
|
|
struct isci_host *isci_host,
|
|
|
|
struct isci_request *request,
|
|
|
|
enum sci_task_status completion_status)
|
|
|
|
{
|
|
|
|
struct isci_remote_device *isci_device = request->isci_device;
|
|
|
|
enum isci_request_status old_state;
|
|
|
|
struct isci_tmf *tmf = isci_request_access_tmf(request);
|
|
|
|
struct completion *tmf_complete;
|
|
|
|
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
|
|
"%s: request = %p, status=%d\n",
|
|
|
|
__func__, request, completion_status);
|
|
|
|
|
|
|
|
old_state = isci_request_change_state(request, completed);
|
|
|
|
|
|
|
|
tmf->status = completion_status;
|
|
|
|
request->complete_in_target = true;
|
|
|
|
|
|
|
|
if (SAS_PROTOCOL_SSP == tmf->proto) {
|
|
|
|
|
|
|
|
memcpy(&tmf->resp.resp_iu,
|
|
|
|
scic_io_request_get_response_iu_address(
|
|
|
|
request->sci_request_handle
|
|
|
|
),
|
|
|
|
sizeof(struct sci_ssp_response_iu));
|
|
|
|
|
|
|
|
} else if (SAS_PROTOCOL_SATA == tmf->proto) {
|
|
|
|
|
|
|
|
memcpy(&tmf->resp.d2h_fis,
|
|
|
|
scic_stp_io_request_get_d2h_reg_address(
|
|
|
|
request->sci_request_handle
|
|
|
|
),
|
|
|
|
sizeof(struct sata_fis_reg_d2h)
|
|
|
|
);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Manage the timer if it is still running. */
|
|
|
|
if (tmf->timeout_timer) {
|
2011-03-03 03:49:26 +08:00
|
|
|
isci_del_timer(isci_host, tmf->timeout_timer);
|
2011-07-03 13:56:22 +08:00
|
|
|
tmf->timeout_timer = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* PRINT_TMF( ((struct isci_tmf *)request->task)); */
|
|
|
|
tmf_complete = tmf->complete;
|
|
|
|
|
2011-04-02 20:15:20 +08:00
|
|
|
scic_controller_complete_io(
|
2011-07-03 13:56:22 +08:00
|
|
|
isci_host->core_controller,
|
2011-03-05 03:51:43 +08:00
|
|
|
to_sci_dev(isci_device),
|
2011-07-03 13:56:22 +08:00
|
|
|
request->sci_request_handle
|
|
|
|
);
|
|
|
|
/* NULL the request handle to make sure it cannot be terminated
|
|
|
|
* or completed again.
|
|
|
|
*/
|
|
|
|
request->sci_request_handle = NULL;
|
|
|
|
|
|
|
|
isci_request_change_state(request, unallocated);
|
|
|
|
list_del_init(&request->dev_node);
|
|
|
|
|
|
|
|
/* The task management part completes last. */
|
|
|
|
complete(tmf_complete);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_ssp_request_get_lun() - This function is called by the sci core to
|
|
|
|
* retrieve the lun for a given task request.
|
|
|
|
* @request: This parameter is the isci_request object.
|
|
|
|
*
|
|
|
|
* lun for specified task request.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_ssp_request_get_function() - This function is called by the sci
|
|
|
|
* core to retrieve the function for a given task request.
|
|
|
|
* @request: This parameter is the isci_request object.
|
|
|
|
*
|
|
|
|
* function code for specified task request.
|
|
|
|
*/
|
|
|
|
u8 isci_task_ssp_request_get_function(struct isci_request *request)
|
|
|
|
{
|
|
|
|
struct isci_tmf *isci_tmf = isci_request_access_tmf(request);
|
|
|
|
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
|
|
"%s: func = %d\n", __func__, isci_tmf->tmf_code);
|
|
|
|
|
|
|
|
return isci_tmf->tmf_code;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_ssp_request_get_io_tag_to_manage() - This function is called by
|
|
|
|
* the sci core to retrieve the io tag for a given task request.
|
|
|
|
* @request: This parameter is the isci_request object.
|
|
|
|
*
|
|
|
|
* io tag for specified task request.
|
|
|
|
*/
|
|
|
|
u16 isci_task_ssp_request_get_io_tag_to_manage(struct isci_request *request)
|
|
|
|
{
|
|
|
|
u16 io_tag = SCI_CONTROLLER_INVALID_IO_TAG;
|
|
|
|
|
|
|
|
if (tmf_task == request->ttype) {
|
|
|
|
struct isci_tmf *tmf = isci_request_access_tmf(request);
|
|
|
|
io_tag = tmf->io_tag;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
|
|
"%s: request = %p, io_tag = %d\n",
|
|
|
|
__func__, request, io_tag);
|
|
|
|
|
|
|
|
return io_tag;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_ssp_request_get_response_data_address() - This function is called
|
|
|
|
* by the sci core to retrieve the response data address for a given task
|
|
|
|
* request.
|
|
|
|
* @request: This parameter is the isci_request object.
|
|
|
|
*
|
|
|
|
* response data address for specified task request.
|
|
|
|
*/
|
|
|
|
void *isci_task_ssp_request_get_response_data_address(
|
|
|
|
struct isci_request *request)
|
|
|
|
{
|
|
|
|
struct isci_tmf *isci_tmf = isci_request_access_tmf(request);
|
|
|
|
|
|
|
|
return &isci_tmf->resp.resp_iu;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_task_ssp_request_get_response_data_length() - This function is called
|
|
|
|
* by the sci core to retrieve the response data length for a given task
|
|
|
|
* request.
|
|
|
|
* @request: This parameter is the isci_request object.
|
|
|
|
*
|
|
|
|
* response data length for specified task request.
|
|
|
|
*/
|
|
|
|
u32 isci_task_ssp_request_get_response_data_length(
|
|
|
|
struct isci_request *request)
|
|
|
|
{
|
|
|
|
struct isci_tmf *isci_tmf = isci_request_access_tmf(request);
|
|
|
|
|
|
|
|
return sizeof(isci_tmf->resp.resp_iu);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_bus_reset_handler() - This function performs a target reset of the
|
|
|
|
* device referenced by "cmd'. This function is exported through the
|
|
|
|
* "struct scsi_host_template" structure such that it is called when an I/O
|
|
|
|
* recovery process has escalated to a target reset. Note that this function
|
|
|
|
* is called from the scsi error handler event thread, so may block on calls.
|
|
|
|
* @scsi_cmd: This parameter specifies the target to be reset.
|
|
|
|
*
|
|
|
|
* SUCCESS if the reset process was successful, else FAILED.
|
|
|
|
*/
|
|
|
|
int isci_bus_reset_handler(struct scsi_cmnd *cmd)
|
|
|
|
{
|
2011-04-01 04:10:44 +08:00
|
|
|
struct domain_device *dev = cmd_to_domain_dev(cmd);
|
|
|
|
struct isci_host *isci_host = dev_to_ihost(dev);
|
2011-07-03 13:56:22 +08:00
|
|
|
unsigned long flags = 0;
|
|
|
|
enum sci_status status;
|
|
|
|
int base_status;
|
2011-04-01 04:10:44 +08:00
|
|
|
struct isci_remote_device *isci_dev = dev->lldd_dev;
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-04-01 04:10:44 +08:00
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
2011-07-03 13:56:22 +08:00
|
|
|
"%s: cmd %p, isci_dev %p\n",
|
|
|
|
__func__, cmd, isci_dev);
|
|
|
|
|
|
|
|
if (!isci_dev) {
|
2011-04-01 04:10:44 +08:00
|
|
|
dev_warn(&isci_host->pdev->dev,
|
2011-07-03 13:56:22 +08:00
|
|
|
"%s: isci_dev is GONE!\n",
|
|
|
|
__func__);
|
|
|
|
|
|
|
|
return TMF_RESP_FUNC_COMPLETE; /* Nothing to reset. */
|
|
|
|
}
|
|
|
|
|
2011-04-01 04:10:44 +08:00
|
|
|
spin_lock_irqsave(&isci_host->scic_lock, flags);
|
2011-03-05 03:51:43 +08:00
|
|
|
status = scic_remote_device_reset(to_sci_dev(isci_dev));
|
2011-07-03 13:56:22 +08:00
|
|
|
if (status != SCI_SUCCESS) {
|
2011-04-01 04:10:44 +08:00
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
scmd_printk(KERN_WARNING, cmd,
|
|
|
|
"%s: scic_remote_device_reset(%p) returned %d!\n",
|
|
|
|
__func__, isci_dev, status);
|
|
|
|
|
|
|
|
return TMF_RESP_FUNC_FAILED;
|
|
|
|
}
|
2011-04-01 04:10:44 +08:00
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* Make sure all pending requests are able to be fully terminated. */
|
2011-04-01 04:10:44 +08:00
|
|
|
isci_device_clear_reset_pending(isci_host, isci_dev);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* Terminate in-progress I/O now. */
|
2011-04-01 04:10:44 +08:00
|
|
|
isci_remote_device_nuke_requests(isci_host, isci_dev);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* Call into the libsas default handler (which calls sas_phy_reset). */
|
|
|
|
base_status = sas_eh_bus_reset_handler(cmd);
|
|
|
|
|
|
|
|
if (base_status != SUCCESS) {
|
|
|
|
|
|
|
|
/* There can be cases where the resets to individual devices
|
|
|
|
* behind an expander will fail because of an unplug of the
|
|
|
|
* expander itself.
|
|
|
|
*/
|
|
|
|
scmd_printk(KERN_WARNING, cmd,
|
|
|
|
"%s: sas_eh_bus_reset_handler(%p) returned %d!\n",
|
|
|
|
__func__, cmd, base_status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* WHAT TO DO HERE IF sas_phy_reset FAILS? */
|
2011-04-01 04:10:44 +08:00
|
|
|
spin_lock_irqsave(&isci_host->scic_lock, flags);
|
2011-03-05 03:51:43 +08:00
|
|
|
status = scic_remote_device_reset_complete(to_sci_dev(isci_dev));
|
2011-04-01 04:10:44 +08:00
|
|
|
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
if (status != SCI_SUCCESS) {
|
|
|
|
scmd_printk(KERN_WARNING, cmd,
|
|
|
|
"%s: scic_remote_device_reset_complete(%p) "
|
|
|
|
"returned %d!\n",
|
|
|
|
__func__, isci_dev, status);
|
|
|
|
}
|
|
|
|
/* WHAT TO DO HERE IF scic_remote_device_reset_complete FAILS? */
|
|
|
|
|
2011-04-01 04:10:44 +08:00
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
2011-07-03 13:56:22 +08:00
|
|
|
"%s: cmd %p, isci_dev %p complete.\n",
|
|
|
|
__func__, cmd, isci_dev);
|
|
|
|
|
|
|
|
return TMF_RESP_FUNC_COMPLETE;
|
|
|
|
}
|