1437 lines
44 KiB
C
1437 lines
44 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 <scsi/sas.h>
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#include <linux/bitops.h>
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#include "isci.h"
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#include "port.h"
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#include "remote_device.h"
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#include "request.h"
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#include "remote_node_context.h"
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#include "scu_event_codes.h"
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#include "task.h"
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#undef C
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#define C(a) (#a)
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const char *dev_state_name(enum sci_remote_device_states state)
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{
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static const char * const strings[] = REMOTE_DEV_STATES;
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return strings[state];
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}
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#undef C
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/**
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* isci_remote_device_not_ready() - This function is called by the ihost when
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* the remote device is not ready. We mark the isci device as ready (not
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* "ready_for_io") and signal the waiting proccess.
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* @isci_host: This parameter specifies the isci host object.
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* @isci_device: This parameter specifies the remote device
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*
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* sci_lock is held on entrance to this function.
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*/
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static void isci_remote_device_not_ready(struct isci_host *ihost,
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struct isci_remote_device *idev, u32 reason)
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{
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struct isci_request *ireq;
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dev_dbg(&ihost->pdev->dev,
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"%s: isci_device = %p\n", __func__, idev);
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switch (reason) {
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case SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED:
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set_bit(IDEV_GONE, &idev->flags);
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break;
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case SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED:
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set_bit(IDEV_IO_NCQERROR, &idev->flags);
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/* Kill all outstanding requests for the device. */
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list_for_each_entry(ireq, &idev->reqs_in_process, dev_node) {
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dev_dbg(&ihost->pdev->dev,
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"%s: isci_device = %p request = %p\n",
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__func__, idev, ireq);
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sci_controller_terminate_request(ihost,
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idev,
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ireq);
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}
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/* Fall through into the default case... */
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default:
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clear_bit(IDEV_IO_READY, &idev->flags);
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break;
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}
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}
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/**
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* isci_remote_device_ready() - This function is called by the ihost when the
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* remote device is ready. We mark the isci device as ready and signal the
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* waiting proccess.
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* @ihost: our valid isci_host
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* @idev: remote device
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*
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*/
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static void isci_remote_device_ready(struct isci_host *ihost, struct isci_remote_device *idev)
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{
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dev_dbg(&ihost->pdev->dev,
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"%s: idev = %p\n", __func__, idev);
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clear_bit(IDEV_IO_NCQERROR, &idev->flags);
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set_bit(IDEV_IO_READY, &idev->flags);
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if (test_and_clear_bit(IDEV_START_PENDING, &idev->flags))
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wake_up(&ihost->eventq);
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}
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/* called once the remote node context is ready to be freed.
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* The remote device can now report that its stop operation is complete. none
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*/
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static void rnc_destruct_done(void *_dev)
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{
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struct isci_remote_device *idev = _dev;
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BUG_ON(idev->started_request_count != 0);
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sci_change_state(&idev->sm, SCI_DEV_STOPPED);
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}
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static enum sci_status sci_remote_device_terminate_requests(struct isci_remote_device *idev)
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{
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struct isci_host *ihost = idev->owning_port->owning_controller;
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enum sci_status status = SCI_SUCCESS;
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u32 i;
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for (i = 0; i < SCI_MAX_IO_REQUESTS; i++) {
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struct isci_request *ireq = ihost->reqs[i];
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enum sci_status s;
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if (!test_bit(IREQ_ACTIVE, &ireq->flags) ||
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ireq->target_device != idev)
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continue;
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s = sci_controller_terminate_request(ihost, idev, ireq);
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if (s != SCI_SUCCESS)
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status = s;
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}
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return status;
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}
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enum sci_status sci_remote_device_stop(struct isci_remote_device *idev,
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u32 timeout)
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{
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struct sci_base_state_machine *sm = &idev->sm;
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enum sci_remote_device_states state = sm->current_state_id;
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switch (state) {
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case SCI_DEV_INITIAL:
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case SCI_DEV_FAILED:
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case SCI_DEV_FINAL:
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default:
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dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
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__func__, dev_state_name(state));
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return SCI_FAILURE_INVALID_STATE;
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case SCI_DEV_STOPPED:
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return SCI_SUCCESS;
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case SCI_DEV_STARTING:
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/* device not started so there had better be no requests */
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BUG_ON(idev->started_request_count != 0);
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sci_remote_node_context_destruct(&idev->rnc,
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rnc_destruct_done, idev);
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/* Transition to the stopping state and wait for the
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* remote node to complete being posted and invalidated.
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*/
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sci_change_state(sm, SCI_DEV_STOPPING);
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return SCI_SUCCESS;
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case SCI_DEV_READY:
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case SCI_STP_DEV_IDLE:
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case SCI_STP_DEV_CMD:
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case SCI_STP_DEV_NCQ:
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case SCI_STP_DEV_NCQ_ERROR:
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case SCI_STP_DEV_AWAIT_RESET:
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case SCI_SMP_DEV_IDLE:
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case SCI_SMP_DEV_CMD:
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sci_change_state(sm, SCI_DEV_STOPPING);
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if (idev->started_request_count == 0) {
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sci_remote_node_context_destruct(&idev->rnc,
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rnc_destruct_done, idev);
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return SCI_SUCCESS;
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} else
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return sci_remote_device_terminate_requests(idev);
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break;
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case SCI_DEV_STOPPING:
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/* All requests should have been terminated, but if there is an
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* attempt to stop a device already in the stopping state, then
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* try again to terminate.
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*/
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return sci_remote_device_terminate_requests(idev);
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case SCI_DEV_RESETTING:
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sci_change_state(sm, SCI_DEV_STOPPING);
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return SCI_SUCCESS;
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}
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}
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enum sci_status sci_remote_device_reset(struct isci_remote_device *idev)
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{
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struct sci_base_state_machine *sm = &idev->sm;
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enum sci_remote_device_states state = sm->current_state_id;
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switch (state) {
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case SCI_DEV_INITIAL:
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case SCI_DEV_STOPPED:
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case SCI_DEV_STARTING:
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case SCI_SMP_DEV_IDLE:
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case SCI_SMP_DEV_CMD:
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case SCI_DEV_STOPPING:
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case SCI_DEV_FAILED:
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case SCI_DEV_RESETTING:
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case SCI_DEV_FINAL:
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default:
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dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
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__func__, dev_state_name(state));
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return SCI_FAILURE_INVALID_STATE;
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case SCI_DEV_READY:
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case SCI_STP_DEV_IDLE:
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case SCI_STP_DEV_CMD:
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case SCI_STP_DEV_NCQ:
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case SCI_STP_DEV_NCQ_ERROR:
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case SCI_STP_DEV_AWAIT_RESET:
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sci_change_state(sm, SCI_DEV_RESETTING);
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return SCI_SUCCESS;
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}
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}
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enum sci_status sci_remote_device_reset_complete(struct isci_remote_device *idev)
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{
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struct sci_base_state_machine *sm = &idev->sm;
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enum sci_remote_device_states state = sm->current_state_id;
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if (state != SCI_DEV_RESETTING) {
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dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
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__func__, dev_state_name(state));
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return SCI_FAILURE_INVALID_STATE;
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}
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sci_change_state(sm, SCI_DEV_READY);
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return SCI_SUCCESS;
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}
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enum sci_status sci_remote_device_suspend(struct isci_remote_device *idev,
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u32 suspend_type)
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{
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struct sci_base_state_machine *sm = &idev->sm;
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enum sci_remote_device_states state = sm->current_state_id;
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if (state != SCI_STP_DEV_CMD) {
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dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
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__func__, dev_state_name(state));
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return SCI_FAILURE_INVALID_STATE;
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}
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return sci_remote_node_context_suspend(&idev->rnc,
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suspend_type, NULL, NULL);
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}
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enum sci_status sci_remote_device_frame_handler(struct isci_remote_device *idev,
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u32 frame_index)
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{
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struct sci_base_state_machine *sm = &idev->sm;
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enum sci_remote_device_states state = sm->current_state_id;
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struct isci_host *ihost = idev->owning_port->owning_controller;
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enum sci_status status;
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switch (state) {
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case SCI_DEV_INITIAL:
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case SCI_DEV_STOPPED:
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case SCI_DEV_STARTING:
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case SCI_STP_DEV_IDLE:
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case SCI_SMP_DEV_IDLE:
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case SCI_DEV_FINAL:
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default:
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dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
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__func__, dev_state_name(state));
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/* Return the frame back to the controller */
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sci_controller_release_frame(ihost, frame_index);
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return SCI_FAILURE_INVALID_STATE;
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case SCI_DEV_READY:
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case SCI_STP_DEV_NCQ_ERROR:
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case SCI_STP_DEV_AWAIT_RESET:
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case SCI_DEV_STOPPING:
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case SCI_DEV_FAILED:
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case SCI_DEV_RESETTING: {
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struct isci_request *ireq;
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struct ssp_frame_hdr hdr;
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void *frame_header;
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ssize_t word_cnt;
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status = sci_unsolicited_frame_control_get_header(&ihost->uf_control,
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frame_index,
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&frame_header);
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if (status != SCI_SUCCESS)
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return status;
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word_cnt = sizeof(hdr) / sizeof(u32);
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sci_swab32_cpy(&hdr, frame_header, word_cnt);
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ireq = sci_request_by_tag(ihost, be16_to_cpu(hdr.tag));
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if (ireq && ireq->target_device == idev) {
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/* The IO request is now in charge of releasing the frame */
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status = sci_io_request_frame_handler(ireq, frame_index);
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} else {
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/* We could not map this tag to a valid IO
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* request Just toss the frame and continue
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*/
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sci_controller_release_frame(ihost, frame_index);
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}
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break;
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}
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case SCI_STP_DEV_NCQ: {
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struct dev_to_host_fis *hdr;
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status = sci_unsolicited_frame_control_get_header(&ihost->uf_control,
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frame_index,
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(void **)&hdr);
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if (status != SCI_SUCCESS)
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return status;
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if (hdr->fis_type == FIS_SETDEVBITS &&
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(hdr->status & ATA_ERR)) {
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idev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED;
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/* TODO Check sactive and complete associated IO if any. */
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sci_change_state(sm, SCI_STP_DEV_NCQ_ERROR);
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} else if (hdr->fis_type == FIS_REGD2H &&
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(hdr->status & ATA_ERR)) {
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/*
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* Some devices return D2H FIS when an NCQ error is detected.
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* Treat this like an SDB error FIS ready reason.
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*/
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idev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED;
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sci_change_state(&idev->sm, SCI_STP_DEV_NCQ_ERROR);
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} else
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status = SCI_FAILURE;
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sci_controller_release_frame(ihost, frame_index);
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break;
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}
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case SCI_STP_DEV_CMD:
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case SCI_SMP_DEV_CMD:
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/* The device does not process any UF received from the hardware while
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* in this state. All unsolicited frames are forwarded to the io request
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* object.
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*/
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status = sci_io_request_frame_handler(idev->working_request, frame_index);
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break;
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}
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return status;
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}
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static bool is_remote_device_ready(struct isci_remote_device *idev)
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{
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struct sci_base_state_machine *sm = &idev->sm;
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enum sci_remote_device_states state = sm->current_state_id;
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switch (state) {
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case SCI_DEV_READY:
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case SCI_STP_DEV_IDLE:
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case SCI_STP_DEV_CMD:
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case SCI_STP_DEV_NCQ:
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case SCI_STP_DEV_NCQ_ERROR:
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case SCI_STP_DEV_AWAIT_RESET:
|
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case SCI_SMP_DEV_IDLE:
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case SCI_SMP_DEV_CMD:
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return true;
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default:
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return false;
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}
|
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}
|
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|
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/*
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* called once the remote node context has transisitioned to a ready
|
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* state (after suspending RX and/or TX due to early D2H fis)
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*/
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static void atapi_remote_device_resume_done(void *_dev)
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{
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struct isci_remote_device *idev = _dev;
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struct isci_request *ireq = idev->working_request;
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|
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sci_change_state(&ireq->sm, SCI_REQ_COMPLETED);
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}
|
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|
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enum sci_status sci_remote_device_event_handler(struct isci_remote_device *idev,
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u32 event_code)
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{
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struct sci_base_state_machine *sm = &idev->sm;
|
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enum sci_remote_device_states state = sm->current_state_id;
|
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enum sci_status status;
|
|
|
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switch (scu_get_event_type(event_code)) {
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case SCU_EVENT_TYPE_RNC_OPS_MISC:
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case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
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case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
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status = sci_remote_node_context_event_handler(&idev->rnc, event_code);
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break;
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case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT:
|
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if (scu_get_event_code(event_code) == SCU_EVENT_IT_NEXUS_TIMEOUT) {
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status = SCI_SUCCESS;
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|
|
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/* Suspend the associated RNC */
|
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sci_remote_node_context_suspend(&idev->rnc,
|
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SCI_SOFTWARE_SUSPENSION,
|
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NULL, NULL);
|
|
|
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dev_dbg(scirdev_to_dev(idev),
|
|
"%s: device: %p event code: %x: %s\n",
|
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__func__, idev, event_code,
|
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is_remote_device_ready(idev)
|
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? "I_T_Nexus_Timeout event"
|
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: "I_T_Nexus_Timeout event in wrong state");
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|
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break;
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}
|
|
/* Else, fall through and treat as unhandled... */
|
|
default:
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dev_dbg(scirdev_to_dev(idev),
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"%s: device: %p event code: %x: %s\n",
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__func__, idev, event_code,
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is_remote_device_ready(idev)
|
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? "unexpected event"
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|
: "unexpected event in wrong state");
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status = SCI_FAILURE_INVALID_STATE;
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break;
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}
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|
|
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if (status != SCI_SUCCESS)
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return status;
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|
|
|
if (state == SCI_STP_DEV_ATAPI_ERROR) {
|
|
/* For ATAPI error state resume the RNC right away. */
|
|
if (scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX ||
|
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scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX) {
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return sci_remote_node_context_resume(&idev->rnc,
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atapi_remote_device_resume_done,
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idev);
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}
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|
}
|
|
|
|
if (state == SCI_STP_DEV_IDLE) {
|
|
|
|
/* We pick up suspension events to handle specifically to this
|
|
* state. We resume the RNC right away.
|
|
*/
|
|
if (scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX ||
|
|
scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX)
|
|
status = sci_remote_node_context_resume(&idev->rnc, NULL, NULL);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static void sci_remote_device_start_request(struct isci_remote_device *idev,
|
|
struct isci_request *ireq,
|
|
enum sci_status status)
|
|
{
|
|
struct isci_port *iport = idev->owning_port;
|
|
|
|
/* cleanup requests that failed after starting on the port */
|
|
if (status != SCI_SUCCESS)
|
|
sci_port_complete_io(iport, idev, ireq);
|
|
else {
|
|
kref_get(&idev->kref);
|
|
idev->started_request_count++;
|
|
}
|
|
}
|
|
|
|
enum sci_status sci_remote_device_start_io(struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq)
|
|
{
|
|
struct sci_base_state_machine *sm = &idev->sm;
|
|
enum sci_remote_device_states state = sm->current_state_id;
|
|
struct isci_port *iport = idev->owning_port;
|
|
enum sci_status status;
|
|
|
|
switch (state) {
|
|
case SCI_DEV_INITIAL:
|
|
case SCI_DEV_STOPPED:
|
|
case SCI_DEV_STARTING:
|
|
case SCI_STP_DEV_NCQ_ERROR:
|
|
case SCI_DEV_STOPPING:
|
|
case SCI_DEV_FAILED:
|
|
case SCI_DEV_RESETTING:
|
|
case SCI_DEV_FINAL:
|
|
default:
|
|
dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
|
|
__func__, dev_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
case SCI_DEV_READY:
|
|
/* attempt to start an io request for this device object. The remote
|
|
* device object will issue the start request for the io and if
|
|
* successful it will start the request for the port object then
|
|
* increment its own request count.
|
|
*/
|
|
status = sci_port_start_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
status = sci_remote_node_context_start_io(&idev->rnc, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
|
|
status = sci_request_start(ireq);
|
|
break;
|
|
case SCI_STP_DEV_IDLE: {
|
|
/* handle the start io operation for a sata device that is in
|
|
* the command idle state. - Evalute the type of IO request to
|
|
* be started - If its an NCQ request change to NCQ substate -
|
|
* If its any other command change to the CMD substate
|
|
*
|
|
* If this is a softreset we may want to have a different
|
|
* substate.
|
|
*/
|
|
enum sci_remote_device_states new_state;
|
|
struct sas_task *task = isci_request_access_task(ireq);
|
|
|
|
status = sci_port_start_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
status = sci_remote_node_context_start_io(&idev->rnc, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
|
|
status = sci_request_start(ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
|
|
if (task->ata_task.use_ncq)
|
|
new_state = SCI_STP_DEV_NCQ;
|
|
else {
|
|
idev->working_request = ireq;
|
|
new_state = SCI_STP_DEV_CMD;
|
|
}
|
|
sci_change_state(sm, new_state);
|
|
break;
|
|
}
|
|
case SCI_STP_DEV_NCQ: {
|
|
struct sas_task *task = isci_request_access_task(ireq);
|
|
|
|
if (task->ata_task.use_ncq) {
|
|
status = sci_port_start_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
status = sci_remote_node_context_start_io(&idev->rnc, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
|
|
status = sci_request_start(ireq);
|
|
} else
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
break;
|
|
}
|
|
case SCI_STP_DEV_AWAIT_RESET:
|
|
return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED;
|
|
case SCI_SMP_DEV_IDLE:
|
|
status = sci_port_start_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
status = sci_remote_node_context_start_io(&idev->rnc, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
|
|
status = sci_request_start(ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
|
|
idev->working_request = ireq;
|
|
sci_change_state(&idev->sm, SCI_SMP_DEV_CMD);
|
|
break;
|
|
case SCI_STP_DEV_CMD:
|
|
case SCI_SMP_DEV_CMD:
|
|
/* device is already handling a command it can not accept new commands
|
|
* until this one is complete.
|
|
*/
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
sci_remote_device_start_request(idev, ireq, status);
|
|
return status;
|
|
}
|
|
|
|
static enum sci_status common_complete_io(struct isci_port *iport,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq)
|
|
{
|
|
enum sci_status status;
|
|
|
|
status = sci_request_complete(ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
status = sci_port_complete_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
sci_remote_device_decrement_request_count(idev);
|
|
return status;
|
|
}
|
|
|
|
enum sci_status sci_remote_device_complete_io(struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq)
|
|
{
|
|
struct sci_base_state_machine *sm = &idev->sm;
|
|
enum sci_remote_device_states state = sm->current_state_id;
|
|
struct isci_port *iport = idev->owning_port;
|
|
enum sci_status status;
|
|
|
|
switch (state) {
|
|
case SCI_DEV_INITIAL:
|
|
case SCI_DEV_STOPPED:
|
|
case SCI_DEV_STARTING:
|
|
case SCI_STP_DEV_IDLE:
|
|
case SCI_SMP_DEV_IDLE:
|
|
case SCI_DEV_FAILED:
|
|
case SCI_DEV_FINAL:
|
|
default:
|
|
dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
|
|
__func__, dev_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
case SCI_DEV_READY:
|
|
case SCI_STP_DEV_AWAIT_RESET:
|
|
case SCI_DEV_RESETTING:
|
|
status = common_complete_io(iport, idev, ireq);
|
|
break;
|
|
case SCI_STP_DEV_CMD:
|
|
case SCI_STP_DEV_NCQ:
|
|
case SCI_STP_DEV_NCQ_ERROR:
|
|
case SCI_STP_DEV_ATAPI_ERROR:
|
|
status = common_complete_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
|
|
if (ireq->sci_status == SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
|
|
/* This request causes hardware error, device needs to be Lun Reset.
|
|
* So here we force the state machine to IDLE state so the rest IOs
|
|
* can reach RNC state handler, these IOs will be completed by RNC with
|
|
* status of "DEVICE_RESET_REQUIRED", instead of "INVALID STATE".
|
|
*/
|
|
sci_change_state(sm, SCI_STP_DEV_AWAIT_RESET);
|
|
} else if (idev->started_request_count == 0)
|
|
sci_change_state(sm, SCI_STP_DEV_IDLE);
|
|
break;
|
|
case SCI_SMP_DEV_CMD:
|
|
status = common_complete_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
sci_change_state(sm, SCI_SMP_DEV_IDLE);
|
|
break;
|
|
case SCI_DEV_STOPPING:
|
|
status = common_complete_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
|
|
if (idev->started_request_count == 0)
|
|
sci_remote_node_context_destruct(&idev->rnc,
|
|
rnc_destruct_done,
|
|
idev);
|
|
break;
|
|
}
|
|
|
|
if (status != SCI_SUCCESS)
|
|
dev_err(scirdev_to_dev(idev),
|
|
"%s: Port:0x%p Device:0x%p Request:0x%p Status:0x%x "
|
|
"could not complete\n", __func__, iport,
|
|
idev, ireq, status);
|
|
else
|
|
isci_put_device(idev);
|
|
|
|
return status;
|
|
}
|
|
|
|
static void sci_remote_device_continue_request(void *dev)
|
|
{
|
|
struct isci_remote_device *idev = dev;
|
|
|
|
/* we need to check if this request is still valid to continue. */
|
|
if (idev->working_request)
|
|
sci_controller_continue_io(idev->working_request);
|
|
}
|
|
|
|
enum sci_status sci_remote_device_start_task(struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq)
|
|
{
|
|
struct sci_base_state_machine *sm = &idev->sm;
|
|
enum sci_remote_device_states state = sm->current_state_id;
|
|
struct isci_port *iport = idev->owning_port;
|
|
enum sci_status status;
|
|
|
|
switch (state) {
|
|
case SCI_DEV_INITIAL:
|
|
case SCI_DEV_STOPPED:
|
|
case SCI_DEV_STARTING:
|
|
case SCI_SMP_DEV_IDLE:
|
|
case SCI_SMP_DEV_CMD:
|
|
case SCI_DEV_STOPPING:
|
|
case SCI_DEV_FAILED:
|
|
case SCI_DEV_RESETTING:
|
|
case SCI_DEV_FINAL:
|
|
default:
|
|
dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
|
|
__func__, dev_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
case SCI_STP_DEV_IDLE:
|
|
case SCI_STP_DEV_CMD:
|
|
case SCI_STP_DEV_NCQ:
|
|
case SCI_STP_DEV_NCQ_ERROR:
|
|
case SCI_STP_DEV_AWAIT_RESET:
|
|
status = sci_port_start_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
status = sci_remote_node_context_start_task(&idev->rnc, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
goto out;
|
|
|
|
status = sci_request_start(ireq);
|
|
if (status != SCI_SUCCESS)
|
|
goto out;
|
|
|
|
/* Note: If the remote device state is not IDLE this will
|
|
* replace the request that probably resulted in the task
|
|
* management request.
|
|
*/
|
|
idev->working_request = ireq;
|
|
sci_change_state(sm, SCI_STP_DEV_CMD);
|
|
|
|
/* The remote node context must cleanup the TCi to NCQ mapping
|
|
* table. The only way to do this correctly is to either write
|
|
* to the TLCR register or to invalidate and repost the RNC. In
|
|
* either case the remote node context state machine will take
|
|
* the correct action when the remote node context is suspended
|
|
* and later resumed.
|
|
*/
|
|
sci_remote_node_context_suspend(&idev->rnc,
|
|
SCI_SOFTWARE_SUSPENSION, NULL, NULL);
|
|
sci_remote_node_context_resume(&idev->rnc,
|
|
sci_remote_device_continue_request,
|
|
idev);
|
|
|
|
out:
|
|
sci_remote_device_start_request(idev, ireq, status);
|
|
/* We need to let the controller start request handler know that
|
|
* it can't post TC yet. We will provide a callback function to
|
|
* post TC when RNC gets resumed.
|
|
*/
|
|
return SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS;
|
|
case SCI_DEV_READY:
|
|
status = sci_port_start_io(iport, idev, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
status = sci_remote_node_context_start_task(&idev->rnc, ireq);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
|
|
status = sci_request_start(ireq);
|
|
break;
|
|
}
|
|
sci_remote_device_start_request(idev, ireq, status);
|
|
|
|
return status;
|
|
}
|
|
|
|
void sci_remote_device_post_request(struct isci_remote_device *idev, u32 request)
|
|
{
|
|
struct isci_port *iport = idev->owning_port;
|
|
u32 context;
|
|
|
|
context = request |
|
|
(ISCI_PEG << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
|
|
(iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
|
|
idev->rnc.remote_node_index;
|
|
|
|
sci_controller_post_request(iport->owning_controller, context);
|
|
}
|
|
|
|
/* called once the remote node context has transisitioned to a
|
|
* ready state. This is the indication that the remote device object can also
|
|
* transition to ready.
|
|
*/
|
|
static void remote_device_resume_done(void *_dev)
|
|
{
|
|
struct isci_remote_device *idev = _dev;
|
|
|
|
if (is_remote_device_ready(idev))
|
|
return;
|
|
|
|
/* go 'ready' if we are not already in a ready state */
|
|
sci_change_state(&idev->sm, SCI_DEV_READY);
|
|
}
|
|
|
|
static void sci_stp_remote_device_ready_idle_substate_resume_complete_handler(void *_dev)
|
|
{
|
|
struct isci_remote_device *idev = _dev;
|
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
|
|
/* For NCQ operation we do not issue a isci_remote_device_not_ready().
|
|
* As a result, avoid sending the ready notification.
|
|
*/
|
|
if (idev->sm.previous_state_id != SCI_STP_DEV_NCQ)
|
|
isci_remote_device_ready(ihost, idev);
|
|
}
|
|
|
|
static void sci_remote_device_initial_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
|
|
/* Initial state is a transitional state to the stopped state */
|
|
sci_change_state(&idev->sm, SCI_DEV_STOPPED);
|
|
}
|
|
|
|
/**
|
|
* sci_remote_device_destruct() - free remote node context and destruct
|
|
* @remote_device: This parameter specifies the remote device to be destructed.
|
|
*
|
|
* Remote device objects are a limited resource. As such, they must be
|
|
* protected. Thus calls to construct and destruct are mutually exclusive and
|
|
* non-reentrant. The return value shall indicate if the device was
|
|
* successfully destructed or if some failure occurred. enum sci_status This value
|
|
* is returned if the device is successfully destructed.
|
|
* SCI_FAILURE_INVALID_REMOTE_DEVICE This value is returned if the supplied
|
|
* device isn't valid (e.g. it's already been destoryed, the handle isn't
|
|
* valid, etc.).
|
|
*/
|
|
static enum sci_status sci_remote_device_destruct(struct isci_remote_device *idev)
|
|
{
|
|
struct sci_base_state_machine *sm = &idev->sm;
|
|
enum sci_remote_device_states state = sm->current_state_id;
|
|
struct isci_host *ihost;
|
|
|
|
if (state != SCI_DEV_STOPPED) {
|
|
dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
|
|
__func__, dev_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
ihost = idev->owning_port->owning_controller;
|
|
sci_controller_free_remote_node_context(ihost, idev,
|
|
idev->rnc.remote_node_index);
|
|
idev->rnc.remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX;
|
|
sci_change_state(sm, SCI_DEV_FINAL);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* isci_remote_device_deconstruct() - This function frees an isci_remote_device.
|
|
* @ihost: This parameter specifies the isci host object.
|
|
* @idev: This parameter specifies the remote device to be freed.
|
|
*
|
|
*/
|
|
static void isci_remote_device_deconstruct(struct isci_host *ihost, struct isci_remote_device *idev)
|
|
{
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: isci_device = %p\n", __func__, idev);
|
|
|
|
/* There should not be any outstanding io's. All paths to
|
|
* here should go through isci_remote_device_nuke_requests.
|
|
* If we hit this condition, we will need a way to complete
|
|
* io requests in process */
|
|
BUG_ON(!list_empty(&idev->reqs_in_process));
|
|
|
|
sci_remote_device_destruct(idev);
|
|
list_del_init(&idev->node);
|
|
isci_put_device(idev);
|
|
}
|
|
|
|
static void sci_remote_device_stopped_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
u32 prev_state;
|
|
|
|
/* If we are entering from the stopping state let the SCI User know that
|
|
* the stop operation has completed.
|
|
*/
|
|
prev_state = idev->sm.previous_state_id;
|
|
if (prev_state == SCI_DEV_STOPPING)
|
|
isci_remote_device_deconstruct(ihost, idev);
|
|
|
|
sci_controller_remote_device_stopped(ihost, idev);
|
|
}
|
|
|
|
static void sci_remote_device_starting_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
|
|
isci_remote_device_not_ready(ihost, idev,
|
|
SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED);
|
|
}
|
|
|
|
static void sci_remote_device_ready_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
struct domain_device *dev = idev->domain_dev;
|
|
|
|
if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_SATA)) {
|
|
sci_change_state(&idev->sm, SCI_STP_DEV_IDLE);
|
|
} else if (dev_is_expander(dev)) {
|
|
sci_change_state(&idev->sm, SCI_SMP_DEV_IDLE);
|
|
} else
|
|
isci_remote_device_ready(ihost, idev);
|
|
}
|
|
|
|
static void sci_remote_device_ready_state_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
struct domain_device *dev = idev->domain_dev;
|
|
|
|
if (dev->dev_type == SAS_END_DEV) {
|
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
|
|
isci_remote_device_not_ready(ihost, idev,
|
|
SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED);
|
|
}
|
|
}
|
|
|
|
static void sci_remote_device_resetting_state_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
|
|
sci_remote_node_context_suspend(
|
|
&idev->rnc, SCI_SOFTWARE_SUSPENSION, NULL, NULL);
|
|
}
|
|
|
|
static void sci_remote_device_resetting_state_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
|
|
sci_remote_node_context_resume(&idev->rnc, NULL, NULL);
|
|
}
|
|
|
|
static void sci_stp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
|
|
idev->working_request = NULL;
|
|
if (sci_remote_node_context_is_ready(&idev->rnc)) {
|
|
/*
|
|
* Since the RNC is ready, it's alright to finish completion
|
|
* processing (e.g. signal the remote device is ready). */
|
|
sci_stp_remote_device_ready_idle_substate_resume_complete_handler(idev);
|
|
} else {
|
|
sci_remote_node_context_resume(&idev->rnc,
|
|
sci_stp_remote_device_ready_idle_substate_resume_complete_handler,
|
|
idev);
|
|
}
|
|
}
|
|
|
|
static void sci_stp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
|
|
BUG_ON(idev->working_request == NULL);
|
|
|
|
isci_remote_device_not_ready(ihost, idev,
|
|
SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED);
|
|
}
|
|
|
|
static void sci_stp_remote_device_ready_ncq_error_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
|
|
if (idev->not_ready_reason == SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED)
|
|
isci_remote_device_not_ready(ihost, idev,
|
|
idev->not_ready_reason);
|
|
}
|
|
|
|
static void sci_smp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
|
|
isci_remote_device_ready(ihost, idev);
|
|
}
|
|
|
|
static void sci_smp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
struct isci_host *ihost = idev->owning_port->owning_controller;
|
|
|
|
BUG_ON(idev->working_request == NULL);
|
|
|
|
isci_remote_device_not_ready(ihost, idev,
|
|
SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED);
|
|
}
|
|
|
|
static void sci_smp_remote_device_ready_cmd_substate_exit(struct sci_base_state_machine *sm)
|
|
{
|
|
struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
|
|
|
|
idev->working_request = NULL;
|
|
}
|
|
|
|
static const struct sci_base_state sci_remote_device_state_table[] = {
|
|
[SCI_DEV_INITIAL] = {
|
|
.enter_state = sci_remote_device_initial_state_enter,
|
|
},
|
|
[SCI_DEV_STOPPED] = {
|
|
.enter_state = sci_remote_device_stopped_state_enter,
|
|
},
|
|
[SCI_DEV_STARTING] = {
|
|
.enter_state = sci_remote_device_starting_state_enter,
|
|
},
|
|
[SCI_DEV_READY] = {
|
|
.enter_state = sci_remote_device_ready_state_enter,
|
|
.exit_state = sci_remote_device_ready_state_exit
|
|
},
|
|
[SCI_STP_DEV_IDLE] = {
|
|
.enter_state = sci_stp_remote_device_ready_idle_substate_enter,
|
|
},
|
|
[SCI_STP_DEV_CMD] = {
|
|
.enter_state = sci_stp_remote_device_ready_cmd_substate_enter,
|
|
},
|
|
[SCI_STP_DEV_NCQ] = { },
|
|
[SCI_STP_DEV_NCQ_ERROR] = {
|
|
.enter_state = sci_stp_remote_device_ready_ncq_error_substate_enter,
|
|
},
|
|
[SCI_STP_DEV_ATAPI_ERROR] = { },
|
|
[SCI_STP_DEV_AWAIT_RESET] = { },
|
|
[SCI_SMP_DEV_IDLE] = {
|
|
.enter_state = sci_smp_remote_device_ready_idle_substate_enter,
|
|
},
|
|
[SCI_SMP_DEV_CMD] = {
|
|
.enter_state = sci_smp_remote_device_ready_cmd_substate_enter,
|
|
.exit_state = sci_smp_remote_device_ready_cmd_substate_exit,
|
|
},
|
|
[SCI_DEV_STOPPING] = { },
|
|
[SCI_DEV_FAILED] = { },
|
|
[SCI_DEV_RESETTING] = {
|
|
.enter_state = sci_remote_device_resetting_state_enter,
|
|
.exit_state = sci_remote_device_resetting_state_exit
|
|
},
|
|
[SCI_DEV_FINAL] = { },
|
|
};
|
|
|
|
/**
|
|
* sci_remote_device_construct() - common construction
|
|
* @sci_port: SAS/SATA port through which this device is accessed.
|
|
* @sci_dev: remote device to construct
|
|
*
|
|
* This routine just performs benign initialization and does not
|
|
* allocate the remote_node_context which is left to
|
|
* sci_remote_device_[de]a_construct(). sci_remote_device_destruct()
|
|
* frees the remote_node_context(s) for the device.
|
|
*/
|
|
static void sci_remote_device_construct(struct isci_port *iport,
|
|
struct isci_remote_device *idev)
|
|
{
|
|
idev->owning_port = iport;
|
|
idev->started_request_count = 0;
|
|
|
|
sci_init_sm(&idev->sm, sci_remote_device_state_table, SCI_DEV_INITIAL);
|
|
|
|
sci_remote_node_context_construct(&idev->rnc,
|
|
SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX);
|
|
}
|
|
|
|
/**
|
|
* sci_remote_device_da_construct() - construct direct attached device.
|
|
*
|
|
* The information (e.g. IAF, Signature FIS, etc.) necessary to build
|
|
* the device is known to the SCI Core since it is contained in the
|
|
* sci_phy object. Remote node context(s) is/are a global resource
|
|
* allocated by this routine, freed by sci_remote_device_destruct().
|
|
*
|
|
* Returns:
|
|
* SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
|
|
* SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
|
|
* sata-only controller instance.
|
|
* SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
|
|
*/
|
|
static enum sci_status sci_remote_device_da_construct(struct isci_port *iport,
|
|
struct isci_remote_device *idev)
|
|
{
|
|
enum sci_status status;
|
|
struct sci_port_properties properties;
|
|
struct domain_device *dev = idev->domain_dev;
|
|
|
|
sci_remote_device_construct(iport, idev);
|
|
|
|
/*
|
|
* This information is request to determine how many remote node context
|
|
* entries will be needed to store the remote node.
|
|
*/
|
|
idev->is_direct_attached = true;
|
|
|
|
sci_port_get_properties(iport, &properties);
|
|
/* Get accurate port width from port's phy mask for a DA device. */
|
|
idev->device_port_width = hweight32(properties.phy_mask);
|
|
|
|
status = sci_controller_allocate_remote_node_context(iport->owning_controller,
|
|
idev,
|
|
&idev->rnc.remote_node_index);
|
|
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
if (dev->dev_type == SAS_END_DEV || dev->dev_type == SATA_DEV ||
|
|
(dev->tproto & SAS_PROTOCOL_STP) || dev_is_expander(dev))
|
|
/* pass */;
|
|
else
|
|
return SCI_FAILURE_UNSUPPORTED_PROTOCOL;
|
|
|
|
idev->connection_rate = sci_port_get_max_allowed_speed(iport);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* sci_remote_device_ea_construct() - construct expander attached device
|
|
*
|
|
* Remote node context(s) is/are a global resource allocated by this
|
|
* routine, freed by sci_remote_device_destruct().
|
|
*
|
|
* Returns:
|
|
* SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
|
|
* SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
|
|
* sata-only controller instance.
|
|
* SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
|
|
*/
|
|
static enum sci_status sci_remote_device_ea_construct(struct isci_port *iport,
|
|
struct isci_remote_device *idev)
|
|
{
|
|
struct domain_device *dev = idev->domain_dev;
|
|
enum sci_status status;
|
|
|
|
sci_remote_device_construct(iport, idev);
|
|
|
|
status = sci_controller_allocate_remote_node_context(iport->owning_controller,
|
|
idev,
|
|
&idev->rnc.remote_node_index);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
if (dev->dev_type == SAS_END_DEV || dev->dev_type == SATA_DEV ||
|
|
(dev->tproto & SAS_PROTOCOL_STP) || dev_is_expander(dev))
|
|
/* pass */;
|
|
else
|
|
return SCI_FAILURE_UNSUPPORTED_PROTOCOL;
|
|
|
|
/*
|
|
* For SAS-2 the physical link rate is actually a logical link
|
|
* rate that incorporates multiplexing. The SCU doesn't
|
|
* incorporate multiplexing and for the purposes of the
|
|
* connection the logical link rate is that same as the
|
|
* physical. Furthermore, the SAS-2 and SAS-1.1 fields overlay
|
|
* one another, so this code works for both situations. */
|
|
idev->connection_rate = min_t(u16, sci_port_get_max_allowed_speed(iport),
|
|
dev->linkrate);
|
|
|
|
/* / @todo Should I assign the port width by reading all of the phys on the port? */
|
|
idev->device_port_width = 1;
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* sci_remote_device_start() - This method will start the supplied remote
|
|
* device. This method enables normal IO requests to flow through to the
|
|
* remote device.
|
|
* @remote_device: This parameter specifies the device to be started.
|
|
* @timeout: This parameter specifies the number of milliseconds in which the
|
|
* start operation should complete.
|
|
*
|
|
* An indication of whether the device was successfully started. SCI_SUCCESS
|
|
* This value is returned if the device was successfully started.
|
|
* SCI_FAILURE_INVALID_PHY This value is returned if the user attempts to start
|
|
* the device when there have been no phys added to it.
|
|
*/
|
|
static enum sci_status sci_remote_device_start(struct isci_remote_device *idev,
|
|
u32 timeout)
|
|
{
|
|
struct sci_base_state_machine *sm = &idev->sm;
|
|
enum sci_remote_device_states state = sm->current_state_id;
|
|
enum sci_status status;
|
|
|
|
if (state != SCI_DEV_STOPPED) {
|
|
dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
|
|
__func__, dev_state_name(state));
|
|
return SCI_FAILURE_INVALID_STATE;
|
|
}
|
|
|
|
status = sci_remote_node_context_resume(&idev->rnc,
|
|
remote_device_resume_done,
|
|
idev);
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
sci_change_state(sm, SCI_DEV_STARTING);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
static enum sci_status isci_remote_device_construct(struct isci_port *iport,
|
|
struct isci_remote_device *idev)
|
|
{
|
|
struct isci_host *ihost = iport->isci_host;
|
|
struct domain_device *dev = idev->domain_dev;
|
|
enum sci_status status;
|
|
|
|
if (dev->parent && dev_is_expander(dev->parent))
|
|
status = sci_remote_device_ea_construct(iport, idev);
|
|
else
|
|
status = sci_remote_device_da_construct(iport, idev);
|
|
|
|
if (status != SCI_SUCCESS) {
|
|
dev_dbg(&ihost->pdev->dev, "%s: construct failed: %d\n",
|
|
__func__, status);
|
|
|
|
return status;
|
|
}
|
|
|
|
/* start the device. */
|
|
status = sci_remote_device_start(idev, ISCI_REMOTE_DEVICE_START_TIMEOUT);
|
|
|
|
if (status != SCI_SUCCESS)
|
|
dev_warn(&ihost->pdev->dev, "remote device start failed: %d\n",
|
|
status);
|
|
|
|
return status;
|
|
}
|
|
|
|
void isci_remote_device_nuke_requests(struct isci_host *ihost, struct isci_remote_device *idev)
|
|
{
|
|
DECLARE_COMPLETION_ONSTACK(aborted_task_completion);
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: idev = %p\n", __func__, idev);
|
|
|
|
/* Cleanup all requests pending for this device. */
|
|
isci_terminate_pending_requests(ihost, idev);
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: idev = %p, done\n", __func__, idev);
|
|
}
|
|
|
|
/**
|
|
* This function builds the isci_remote_device when a libsas dev_found message
|
|
* is received.
|
|
* @isci_host: This parameter specifies the isci host object.
|
|
* @port: This parameter specifies the isci_port conected to this device.
|
|
*
|
|
* pointer to new isci_remote_device.
|
|
*/
|
|
static struct isci_remote_device *
|
|
isci_remote_device_alloc(struct isci_host *ihost, struct isci_port *iport)
|
|
{
|
|
struct isci_remote_device *idev;
|
|
int i;
|
|
|
|
for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
|
|
idev = &ihost->devices[i];
|
|
if (!test_and_set_bit(IDEV_ALLOCATED, &idev->flags))
|
|
break;
|
|
}
|
|
|
|
if (i >= SCI_MAX_REMOTE_DEVICES) {
|
|
dev_warn(&ihost->pdev->dev, "%s: failed\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
if (WARN_ONCE(!list_empty(&idev->reqs_in_process), "found requests in process\n"))
|
|
return NULL;
|
|
|
|
if (WARN_ONCE(!list_empty(&idev->node), "found non-idle remote device\n"))
|
|
return NULL;
|
|
|
|
return idev;
|
|
}
|
|
|
|
void isci_remote_device_release(struct kref *kref)
|
|
{
|
|
struct isci_remote_device *idev = container_of(kref, typeof(*idev), kref);
|
|
struct isci_host *ihost = idev->isci_port->isci_host;
|
|
|
|
idev->domain_dev = NULL;
|
|
idev->isci_port = NULL;
|
|
clear_bit(IDEV_START_PENDING, &idev->flags);
|
|
clear_bit(IDEV_STOP_PENDING, &idev->flags);
|
|
clear_bit(IDEV_IO_READY, &idev->flags);
|
|
clear_bit(IDEV_GONE, &idev->flags);
|
|
smp_mb__before_clear_bit();
|
|
clear_bit(IDEV_ALLOCATED, &idev->flags);
|
|
wake_up(&ihost->eventq);
|
|
}
|
|
|
|
/**
|
|
* isci_remote_device_stop() - This function is called internally to stop the
|
|
* remote device.
|
|
* @isci_host: This parameter specifies the isci host object.
|
|
* @isci_device: This parameter specifies the remote device.
|
|
*
|
|
* The status of the ihost request to stop.
|
|
*/
|
|
enum sci_status isci_remote_device_stop(struct isci_host *ihost, struct isci_remote_device *idev)
|
|
{
|
|
enum sci_status status;
|
|
unsigned long flags;
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: isci_device = %p\n", __func__, idev);
|
|
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
idev->domain_dev->lldd_dev = NULL; /* disable new lookups */
|
|
set_bit(IDEV_GONE, &idev->flags);
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
|
|
/* Kill all outstanding requests. */
|
|
isci_remote_device_nuke_requests(ihost, idev);
|
|
|
|
set_bit(IDEV_STOP_PENDING, &idev->flags);
|
|
|
|
spin_lock_irqsave(&ihost->scic_lock, flags);
|
|
status = sci_remote_device_stop(idev, 50);
|
|
spin_unlock_irqrestore(&ihost->scic_lock, flags);
|
|
|
|
/* Wait for the stop complete callback. */
|
|
if (WARN_ONCE(status != SCI_SUCCESS, "failed to stop device\n"))
|
|
/* nothing to wait for */;
|
|
else
|
|
wait_for_device_stop(ihost, idev);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* isci_remote_device_gone() - This function is called by libsas when a domain
|
|
* device is removed.
|
|
* @domain_device: This parameter specifies the libsas domain device.
|
|
*
|
|
*/
|
|
void isci_remote_device_gone(struct domain_device *dev)
|
|
{
|
|
struct isci_host *ihost = dev_to_ihost(dev);
|
|
struct isci_remote_device *idev = dev->lldd_dev;
|
|
|
|
dev_dbg(&ihost->pdev->dev,
|
|
"%s: domain_device = %p, isci_device = %p, isci_port = %p\n",
|
|
__func__, dev, idev, idev->isci_port);
|
|
|
|
isci_remote_device_stop(ihost, idev);
|
|
}
|
|
|
|
|
|
/**
|
|
* isci_remote_device_found() - This function is called by libsas when a remote
|
|
* device is discovered. A remote device object is created and started. the
|
|
* function then sleeps until the sci core device started message is
|
|
* received.
|
|
* @domain_device: This parameter specifies the libsas domain device.
|
|
*
|
|
* status, zero indicates success.
|
|
*/
|
|
int isci_remote_device_found(struct domain_device *dev)
|
|
{
|
|
struct isci_host *isci_host = dev_to_ihost(dev);
|
|
struct isci_port *isci_port = dev->port->lldd_port;
|
|
struct isci_remote_device *isci_device;
|
|
enum sci_status status;
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
"%s: domain_device = %p\n", __func__, dev);
|
|
|
|
if (!isci_port)
|
|
return -ENODEV;
|
|
|
|
isci_device = isci_remote_device_alloc(isci_host, isci_port);
|
|
if (!isci_device)
|
|
return -ENODEV;
|
|
|
|
kref_init(&isci_device->kref);
|
|
INIT_LIST_HEAD(&isci_device->node);
|
|
|
|
spin_lock_irq(&isci_host->scic_lock);
|
|
isci_device->domain_dev = dev;
|
|
isci_device->isci_port = isci_port;
|
|
list_add_tail(&isci_device->node, &isci_port->remote_dev_list);
|
|
|
|
set_bit(IDEV_START_PENDING, &isci_device->flags);
|
|
status = isci_remote_device_construct(isci_port, isci_device);
|
|
|
|
dev_dbg(&isci_host->pdev->dev,
|
|
"%s: isci_device = %p\n",
|
|
__func__, isci_device);
|
|
|
|
if (status == SCI_SUCCESS) {
|
|
/* device came up, advertise it to the world */
|
|
dev->lldd_dev = isci_device;
|
|
} else
|
|
isci_put_device(isci_device);
|
|
spin_unlock_irq(&isci_host->scic_lock);
|
|
|
|
/* wait for the device ready callback. */
|
|
wait_for_device_start(isci_host, isci_device);
|
|
|
|
return status == SCI_SUCCESS ? 0 : -ENODEV;
|
|
}
|