813 lines
24 KiB
C
813 lines
24 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/completion.h>
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#include <linux/irqflags.h>
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#include "sas.h"
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#include <scsi/libsas.h>
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#include "remote_device.h"
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#include "remote_node_context.h"
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#include "isci.h"
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#include "request.h"
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#include "task.h"
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#include "host.h"
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/**
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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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*
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*/
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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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{
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unsigned long flags;
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/* Normal notification (task_done) */
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dev_dbg(&ihost->pdev->dev, "%s: task = %p, response=%d, status=%d\n",
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__func__, task, response, status);
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spin_lock_irqsave(&task->task_state_lock, flags);
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task->task_status.resp = response;
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task->task_status.stat = status;
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/* Normal notification (task_done) */
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task->task_state_flags |= SAS_TASK_STATE_DONE;
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task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
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SAS_TASK_STATE_PENDING);
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task->lldd_task = NULL;
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spin_unlock_irqrestore(&task->task_state_lock, flags);
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task->task_done(task);
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}
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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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static inline int isci_device_io_ready(struct isci_remote_device *idev,
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struct sas_task *task)
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{
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return idev ? test_bit(IDEV_IO_READY, &idev->flags) ||
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(test_bit(IDEV_IO_NCQERROR, &idev->flags) &&
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isci_task_is_ncq_recovery(task))
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: 0;
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}
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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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struct isci_host *ihost = dev_to_ihost(task->dev);
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struct isci_remote_device *idev;
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unsigned long flags;
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bool io_ready;
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u16 tag;
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dev_dbg(&ihost->pdev->dev, "%s: num=%d\n", __func__, num);
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for_each_sas_task(num, task) {
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enum sci_status status = SCI_FAILURE;
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spin_lock_irqsave(&ihost->scic_lock, flags);
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idev = isci_lookup_device(task->dev);
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io_ready = isci_device_io_ready(idev, task);
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tag = isci_alloc_tag(ihost);
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spin_unlock_irqrestore(&ihost->scic_lock, flags);
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dev_dbg(&ihost->pdev->dev,
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"task: %p, num: %d dev: %p idev: %p:%#lx cmd = %p\n",
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task, num, task->dev, idev, idev ? idev->flags : 0,
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task->uldd_task);
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if (!idev) {
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isci_task_refuse(ihost, task, SAS_TASK_UNDELIVERED,
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SAS_DEVICE_UNKNOWN);
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} else if (!io_ready || tag == SCI_CONTROLLER_INVALID_IO_TAG) {
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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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isci_task_refuse(ihost, task, SAS_TASK_COMPLETE,
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SAS_QUEUE_FULL);
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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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if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
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/* The I/O was aborted. */
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spin_unlock_irqrestore(&task->task_state_lock,
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flags);
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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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} else {
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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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/* build and send the request. */
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status = isci_request_execute(ihost, idev, task, tag);
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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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if (test_bit(IDEV_GONE, &idev->flags)) {
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/* Indicate that the device
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* is gone.
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*/
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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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} else {
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/* Indicate QUEUE_FULL so that
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* the scsi midlayer retries.
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* If the request failed for
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* remote device reasons, it
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* gets returned as
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* SAS_TASK_UNDELIVERED next
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* time through.
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*/
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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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}
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}
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}
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}
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if (status != SCI_SUCCESS && tag != SCI_CONTROLLER_INVALID_IO_TAG) {
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spin_lock_irqsave(&ihost->scic_lock, flags);
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/* command never hit the device, so just free
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* the tci and skip the sequence increment
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*/
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isci_tci_free(ihost, ISCI_TAG_TCI(tag));
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spin_unlock_irqrestore(&ihost->scic_lock, flags);
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}
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isci_put_device(idev);
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}
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return 0;
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}
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static struct isci_request *isci_task_request_build(struct isci_host *ihost,
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struct isci_remote_device *idev,
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u16 tag, struct isci_tmf *isci_tmf)
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{
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enum sci_status status = SCI_FAILURE;
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struct isci_request *ireq = NULL;
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struct domain_device *dev;
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dev_dbg(&ihost->pdev->dev,
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"%s: isci_tmf = %p\n", __func__, isci_tmf);
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dev = idev->domain_dev;
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/* do common allocation and init of request object. */
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ireq = isci_tmf_request_from_tag(ihost, isci_tmf, tag);
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if (!ireq)
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return NULL;
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/* let the core do it's construct. */
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status = sci_task_request_construct(ihost, idev, tag,
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ireq);
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if (status != SCI_SUCCESS) {
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dev_warn(&ihost->pdev->dev,
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"%s: sci_task_request_construct failed - "
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"status = 0x%x\n",
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__func__,
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status);
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return NULL;
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}
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/* XXX convert to get this from task->tproto like other drivers */
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if (dev->dev_type == SAS_END_DEVICE) {
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isci_tmf->proto = SAS_PROTOCOL_SSP;
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status = sci_task_request_construct_ssp(ireq);
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if (status != SCI_SUCCESS)
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return NULL;
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}
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return ireq;
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}
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static int isci_task_execute_tmf(struct isci_host *ihost,
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struct isci_remote_device *idev,
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struct isci_tmf *tmf, unsigned long timeout_ms)
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{
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DECLARE_COMPLETION_ONSTACK(completion);
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enum sci_task_status status = SCI_TASK_FAILURE;
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struct isci_request *ireq;
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int ret = TMF_RESP_FUNC_FAILED;
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unsigned long flags;
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unsigned long timeleft;
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u16 tag;
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spin_lock_irqsave(&ihost->scic_lock, flags);
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tag = isci_alloc_tag(ihost);
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spin_unlock_irqrestore(&ihost->scic_lock, flags);
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if (tag == SCI_CONTROLLER_INVALID_IO_TAG)
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return ret;
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/* sanity check, return TMF_RESP_FUNC_FAILED
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* if the device is not there and ready.
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*/
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if (!idev ||
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(!test_bit(IDEV_IO_READY, &idev->flags) &&
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!test_bit(IDEV_IO_NCQERROR, &idev->flags))) {
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dev_dbg(&ihost->pdev->dev,
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"%s: idev = %p not ready (%#lx)\n",
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__func__,
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idev, idev ? idev->flags : 0);
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goto err_tci;
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} else
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dev_dbg(&ihost->pdev->dev,
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"%s: idev = %p\n",
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__func__, idev);
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/* Assign the pointer to the TMF's completion kernel wait structure. */
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tmf->complete = &completion;
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tmf->status = SCI_FAILURE_TIMEOUT;
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ireq = isci_task_request_build(ihost, idev, tag, tmf);
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if (!ireq)
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goto err_tci;
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spin_lock_irqsave(&ihost->scic_lock, flags);
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/* start the TMF io. */
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status = sci_controller_start_task(ihost, idev, ireq);
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if (status != SCI_TASK_SUCCESS) {
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dev_dbg(&ihost->pdev->dev,
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"%s: start_io failed - status = 0x%x, request = %p\n",
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__func__,
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status,
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ireq);
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spin_unlock_irqrestore(&ihost->scic_lock, flags);
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goto err_tci;
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}
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spin_unlock_irqrestore(&ihost->scic_lock, flags);
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/* The RNC must be unsuspended before the TMF can get a response. */
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isci_remote_device_resume_from_abort(ihost, idev);
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/* Wait for the TMF to complete, or a timeout. */
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timeleft = wait_for_completion_timeout(&completion,
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msecs_to_jiffies(timeout_ms));
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if (timeleft == 0) {
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/* The TMF did not complete - this could be because
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* of an unplug. Terminate the TMF request now.
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*/
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isci_remote_device_suspend_terminate(ihost, idev, ireq);
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}
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isci_print_tmf(ihost, tmf);
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if (tmf->status == SCI_SUCCESS)
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ret = TMF_RESP_FUNC_COMPLETE;
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else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) {
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dev_dbg(&ihost->pdev->dev,
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"%s: tmf.status == "
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"SCI_FAILURE_IO_RESPONSE_VALID\n",
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__func__);
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ret = TMF_RESP_FUNC_COMPLETE;
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}
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/* Else - leave the default "failed" status alone. */
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dev_dbg(&ihost->pdev->dev,
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"%s: completed request = %p\n",
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__func__,
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ireq);
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return ret;
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err_tci:
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spin_lock_irqsave(&ihost->scic_lock, flags);
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isci_tci_free(ihost, ISCI_TAG_TCI(tag));
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spin_unlock_irqrestore(&ihost->scic_lock, flags);
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return ret;
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}
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static void isci_task_build_tmf(struct isci_tmf *tmf,
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enum isci_tmf_function_codes code)
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{
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memset(tmf, 0, sizeof(*tmf));
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tmf->tmf_code = code;
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}
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static void isci_task_build_abort_task_tmf(struct isci_tmf *tmf,
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enum isci_tmf_function_codes code,
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struct isci_request *old_request)
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{
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isci_task_build_tmf(tmf, code);
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tmf->io_tag = old_request->io_tag;
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}
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/**
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* isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain
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* Template functions.
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* @lun: This parameter specifies the lun to be reset.
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*
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* status, zero indicates success.
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*/
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static int isci_task_send_lu_reset_sas(
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struct isci_host *isci_host,
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struct isci_remote_device *isci_device,
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u8 *lun)
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{
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struct isci_tmf tmf;
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int ret = TMF_RESP_FUNC_FAILED;
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_host = %p, isci_device = %p\n",
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__func__, isci_host, isci_device);
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/* Send the LUN reset to the target. By the time the call returns,
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* the TMF has fully exected in the target (in which case the return
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* value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or
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* was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED").
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*/
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isci_task_build_tmf(&tmf, isci_tmf_ssp_lun_reset);
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#define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */
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ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, ISCI_LU_RESET_TIMEOUT_MS);
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if (ret == TMF_RESP_FUNC_COMPLETE)
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dev_dbg(&isci_host->pdev->dev,
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"%s: %p: TMF_LU_RESET passed\n",
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__func__, isci_device);
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else
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dev_dbg(&isci_host->pdev->dev,
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"%s: %p: TMF_LU_RESET failed (%x)\n",
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__func__, isci_device, ret);
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return ret;
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}
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int isci_task_lu_reset(struct domain_device *dev, u8 *lun)
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{
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struct isci_host *ihost = dev_to_ihost(dev);
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struct isci_remote_device *idev;
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unsigned long flags;
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int ret = TMF_RESP_FUNC_COMPLETE;
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spin_lock_irqsave(&ihost->scic_lock, flags);
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idev = isci_get_device(dev->lldd_dev);
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spin_unlock_irqrestore(&ihost->scic_lock, flags);
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dev_dbg(&ihost->pdev->dev,
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"%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
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__func__, dev, ihost, idev);
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if (!idev) {
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/* If the device is gone, escalate to I_T_Nexus_Reset. */
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dev_dbg(&ihost->pdev->dev, "%s: No dev\n", __func__);
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ret = TMF_RESP_FUNC_FAILED;
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goto out;
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}
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/* Suspend the RNC, kill all TCs */
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if (isci_remote_device_suspend_terminate(ihost, idev, NULL)
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!= SCI_SUCCESS) {
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/* The suspend/terminate only fails if isci_get_device fails */
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ret = TMF_RESP_FUNC_FAILED;
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goto out;
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}
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/* All pending I/Os have been terminated and cleaned up. */
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if (!test_bit(IDEV_GONE, &idev->flags)) {
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if (dev_is_sata(dev))
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sas_ata_schedule_reset(dev);
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else
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/* Send the task management part of the reset. */
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ret = isci_task_send_lu_reset_sas(ihost, idev, lun);
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}
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out:
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isci_put_device(idev);
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return ret;
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}
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/* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */
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int isci_task_clear_nexus_port(struct asd_sas_port *port)
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{
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return TMF_RESP_FUNC_FAILED;
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}
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int isci_task_clear_nexus_ha(struct sas_ha_struct *ha)
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{
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return TMF_RESP_FUNC_FAILED;
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}
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/* Task Management Functions. Must be called from process context. */
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/**
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* isci_task_abort_task() - This function is one of the SAS Domain Template
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* 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)
|
|
{
|
|
struct isci_host *ihost = dev_to_ihost(task->dev);
|
|
DECLARE_COMPLETION_ONSTACK(aborted_io_completion);
|
|
struct isci_request *old_request = NULL;
|
|
struct isci_remote_device *idev = NULL;
|
|
struct isci_tmf tmf;
|
|
int ret = TMF_RESP_FUNC_FAILED;
|
|
unsigned long flags;
|
|
int target_done_already = 0;
|
|
|
|
/* 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.
|
|
*/
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
spin_lock(&task->task_state_lock);
|
|
|
|
old_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) &&
|
|
old_request) {
|
|
idev = isci_get_device(task->dev->lldd_dev);
|
|
target_done_already = test_bit(IREQ_COMPLETE_IN_TARGET,
|
|
&old_request->flags);
|
|
}
|
|
spin_unlock(&task->task_state_lock);
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: dev = %p (%s%s), task = %p, old_request == %p\n",
|
|
__func__, idev,
|
|
(dev_is_sata(task->dev) ? "STP/SATA"
|
|
: ((dev_is_expander(task->dev))
|
|
? "SMP"
|
|
: "SSP")),
|
|
((idev) ? ((test_bit(IDEV_GONE, &idev->flags))
|
|
? " IDEV_GONE"
|
|
: "")
|
|
: " <NULL>"),
|
|
task, old_request);
|
|
|
|
/* Device reset conditions signalled in task_state_flags are the
|
|
* responsbility of libsas to observe at the start of the error
|
|
* handler thread.
|
|
*/
|
|
if (!idev || !old_request) {
|
|
/* 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 successful.
|
|
*/
|
|
spin_lock_irqsave(&task->task_state_lock, flags);
|
|
task->task_state_flags |= SAS_TASK_STATE_DONE;
|
|
task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
|
|
SAS_TASK_STATE_PENDING);
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
|
|
ret = TMF_RESP_FUNC_COMPLETE;
|
|
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: abort task not needed for %p\n",
|
|
__func__, task);
|
|
goto out;
|
|
}
|
|
/* Suspend the RNC, kill the TC */
|
|
if (isci_remote_device_suspend_terminate(ihost, idev, old_request)
|
|
!= SCI_SUCCESS) {
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: isci_remote_device_reset_terminate(dev=%p, "
|
|
"req=%p, task=%p) failed\n",
|
|
__func__, idev, old_request, task);
|
|
ret = TMF_RESP_FUNC_FAILED;
|
|
goto out;
|
|
}
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
|
|
if (task->task_proto == SAS_PROTOCOL_SMP ||
|
|
sas_protocol_ata(task->task_proto) ||
|
|
target_done_already ||
|
|
test_bit(IDEV_GONE, &idev->flags)) {
|
|
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
|
|
/* No task to send, so explicitly resume the device here */
|
|
isci_remote_device_resume_from_abort(ihost, idev);
|
|
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: %s request"
|
|
" or complete_in_target (%d), "
|
|
"or IDEV_GONE (%d), thus no TMF\n",
|
|
__func__,
|
|
((task->task_proto == SAS_PROTOCOL_SMP)
|
|
? "SMP"
|
|
: (sas_protocol_ata(task->task_proto)
|
|
? "SATA/STP"
|
|
: "<other>")
|
|
),
|
|
test_bit(IREQ_COMPLETE_IN_TARGET,
|
|
&old_request->flags),
|
|
test_bit(IDEV_GONE, &idev->flags));
|
|
|
|
spin_lock_irqsave(&task->task_state_lock, flags);
|
|
task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
|
|
SAS_TASK_STATE_PENDING);
|
|
task->task_state_flags |= SAS_TASK_STATE_DONE;
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
|
|
ret = TMF_RESP_FUNC_COMPLETE;
|
|
} else {
|
|
/* Fill in the tmf stucture */
|
|
isci_task_build_abort_task_tmf(&tmf, isci_tmf_ssp_task_abort,
|
|
old_request);
|
|
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
|
|
/* Send the task management request. */
|
|
#define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* 1/2 second timeout */
|
|
ret = isci_task_execute_tmf(ihost, idev, &tmf,
|
|
ISCI_ABORT_TASK_TIMEOUT_MS);
|
|
}
|
|
out:
|
|
dev_warn(&ihost->pdev->dev,
|
|
"%s: Done; dev = %p, task = %p , old_request == %p\n",
|
|
__func__, idev, task, old_request);
|
|
isci_put_device(idev);
|
|
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.
|
|
* @ihost: This parameter specifies the ISCI host object
|
|
* @ireq: 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 *ihost,
|
|
struct isci_request *ireq,
|
|
enum sci_task_status completion_status)
|
|
{
|
|
struct isci_tmf *tmf = isci_request_access_tmf(ireq);
|
|
struct completion *tmf_complete = NULL;
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: request = %p, status=%d\n",
|
|
__func__, ireq, completion_status);
|
|
|
|
set_bit(IREQ_COMPLETE_IN_TARGET, &ireq->flags);
|
|
|
|
if (tmf) {
|
|
tmf->status = completion_status;
|
|
|
|
if (tmf->proto == SAS_PROTOCOL_SSP) {
|
|
memcpy(&tmf->resp.resp_iu,
|
|
&ireq->ssp.rsp,
|
|
SSP_RESP_IU_MAX_SIZE);
|
|
} else if (tmf->proto == SAS_PROTOCOL_SATA) {
|
|
memcpy(&tmf->resp.d2h_fis,
|
|
&ireq->stp.rsp,
|
|
sizeof(struct dev_to_host_fis));
|
|
}
|
|
/* PRINT_TMF( ((struct isci_tmf *)request->task)); */
|
|
tmf_complete = tmf->complete;
|
|
}
|
|
sci_controller_complete_io(ihost, ireq->target_device, ireq);
|
|
/* set the 'terminated' flag handle to make sure it cannot be terminated
|
|
* or completed again.
|
|
*/
|
|
set_bit(IREQ_TERMINATED, &ireq->flags);
|
|
|
|
if (test_and_clear_bit(IREQ_ABORT_PATH_ACTIVE, &ireq->flags))
|
|
wake_up_all(&ihost->eventq);
|
|
|
|
if (!test_bit(IREQ_NO_AUTO_FREE_TAG, &ireq->flags))
|
|
isci_free_tag(ihost, ireq->io_tag);
|
|
|
|
/* The task management part completes last. */
|
|
if (tmf_complete)
|
|
complete(tmf_complete);
|
|
}
|
|
|
|
static int isci_reset_device(struct isci_host *ihost,
|
|
struct domain_device *dev,
|
|
struct isci_remote_device *idev)
|
|
{
|
|
int rc = TMF_RESP_FUNC_COMPLETE, reset_stat = -1;
|
|
struct sas_phy *phy = sas_get_local_phy(dev);
|
|
struct isci_port *iport = dev->port->lldd_port;
|
|
|
|
dev_dbg(&ihost->pdev->dev, "%s: idev %p\n", __func__, idev);
|
|
|
|
/* Suspend the RNC, terminate all outstanding TCs. */
|
|
if (isci_remote_device_suspend_terminate(ihost, idev, NULL)
|
|
!= SCI_SUCCESS) {
|
|
rc = TMF_RESP_FUNC_FAILED;
|
|
goto out;
|
|
}
|
|
/* Note that since the termination for outstanding requests succeeded,
|
|
* this function will return success. This is because the resets will
|
|
* only fail if the device has been removed (ie. hotplug), and the
|
|
* primary duty of this function is to cleanup tasks, so that is the
|
|
* relevant status.
|
|
*/
|
|
if (!test_bit(IDEV_GONE, &idev->flags)) {
|
|
if (scsi_is_sas_phy_local(phy)) {
|
|
struct isci_phy *iphy = &ihost->phys[phy->number];
|
|
|
|
reset_stat = isci_port_perform_hard_reset(ihost, iport,
|
|
iphy);
|
|
} else
|
|
reset_stat = sas_phy_reset(phy, !dev_is_sata(dev));
|
|
}
|
|
/* Explicitly resume the RNC here, since there was no task sent. */
|
|
isci_remote_device_resume_from_abort(ihost, idev);
|
|
|
|
dev_dbg(&ihost->pdev->dev, "%s: idev %p complete, reset_stat=%d.\n",
|
|
__func__, idev, reset_stat);
|
|
out:
|
|
sas_put_local_phy(phy);
|
|
return rc;
|
|
}
|
|
|
|
int isci_task_I_T_nexus_reset(struct domain_device *dev)
|
|
{
|
|
struct isci_host *ihost = dev_to_ihost(dev);
|
|
struct isci_remote_device *idev;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
idev = isci_get_device(dev->lldd_dev);
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
|
|
if (!idev) {
|
|
/* XXX: need to cleanup any ireqs targeting this
|
|
* domain_device
|
|
*/
|
|
ret = TMF_RESP_FUNC_COMPLETE;
|
|
goto out;
|
|
}
|
|
|
|
ret = isci_reset_device(ihost, dev, idev);
|
|
out:
|
|
isci_put_device(idev);
|
|
return ret;
|
|
}
|