2011-07-02 23:56:22 -06:00
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/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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2011-04-22 20:18:03 -06:00
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#ifndef _ISCI_REMOTE_DEVICE_H_
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2011-07-02 23:56:22 -06:00
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#define _ISCI_REMOTE_DEVICE_H_
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2011-04-22 20:18:03 -06:00
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#include <scsi/libsas.h>
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#include "scu_remote_node_context.h"
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#include "remote_node_context.h"
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#include "port.h"
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2011-07-02 23:56:22 -06:00
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2011-04-22 20:18:03 -06:00
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enum scic_remote_device_not_ready_reason_code {
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SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED,
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SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED,
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SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED,
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SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED,
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SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED,
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SCIC_REMOTE_DEVICE_NOT_READY_REASON_CODE_MAX
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};
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struct scic_sds_remote_device {
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/**
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* This field contains the information for the base remote device state
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* machine.
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*/
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struct sci_base_state_machine state_machine;
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/**
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* This field is the programmed device port width. This value is
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* written to the RCN data structure to tell the SCU how many open
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* connections this device can have.
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*/
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u32 device_port_width;
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/**
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* This field is the programmed connection rate for this remote device. It is
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* used to program the TC with the maximum allowed connection rate.
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*/
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enum sas_linkrate connection_rate;
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/**
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* This filed is assinged the value of true if the device is directly
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* attached to the port.
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*/
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bool is_direct_attached;
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/**
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* This filed contains a pointer back to the port to which this device
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* is assigned.
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*/
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struct scic_sds_port *owning_port;
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/**
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* This field contains the SCU silicon remote node context specific
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* information.
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*/
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struct scic_sds_remote_node_context rnc;
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/**
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* This field contains the stated request count for the remote device. The
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* device can not reach the SCI_BASE_REMOTE_DEVICE_STATE_STOPPED until all
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* requests are complete and the rnc_posted value is false.
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*/
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u32 started_request_count;
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/**
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* This field contains a pointer to the working request object. It is only
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* used only for SATA requests since the unsolicited frames we get from the
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* hardware have no Tag value to look up the io request object.
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*/
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struct scic_sds_request *working_request;
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/**
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* This field contains the reason for the remote device going not_ready. It is
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* assigned in the state handlers and used in the state transition.
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*/
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u32 not_ready_reason;
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};
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2011-07-02 23:56:22 -06:00
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struct isci_remote_device {
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enum isci_status status;
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2011-03-04 13:10:29 -07:00
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#define IDEV_START_PENDING 0
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#define IDEV_STOP_PENDING 1
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2011-03-03 18:59:32 -07:00
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#define IDEV_ALLOCATED 2
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2011-05-02 14:59:25 -06:00
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#define IDEV_EH 3
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2011-03-04 13:10:29 -07:00
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unsigned long flags;
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2011-07-02 23:56:22 -06:00
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struct isci_port *isci_port;
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struct domain_device *domain_dev;
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struct list_head node;
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struct list_head reqs_in_process;
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spinlock_t state_lock;
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2011-04-21 19:14:45 -06:00
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struct scic_sds_remote_device sci;
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2011-07-02 23:56:22 -06:00
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};
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#define ISCI_REMOTE_DEVICE_START_TIMEOUT 5000
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2011-03-04 13:10:29 -07:00
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enum sci_status isci_remote_device_stop(struct isci_host *ihost,
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struct isci_remote_device *idev);
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2011-03-31 14:10:44 -06:00
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void isci_remote_device_nuke_requests(struct isci_host *ihost,
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struct isci_remote_device *idev);
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void isci_remote_device_gone(struct domain_device *domain_dev);
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int isci_remote_device_found(struct domain_device *domain_dev);
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bool isci_device_is_reset_pending(struct isci_host *ihost,
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struct isci_remote_device *idev);
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void isci_device_clear_reset_pending(struct isci_host *ihost,
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struct isci_remote_device *idev);
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void isci_remote_device_change_state(struct isci_remote_device *idev,
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enum isci_status status);
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2011-04-22 20:18:03 -06:00
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/**
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* scic_remote_device_stop() - This method will stop both transmission and
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* reception of link activity for the supplied remote device. This method
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* disables normal IO requests from flowing through to the remote device.
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* @remote_device: This parameter specifies the device to be stopped.
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* @timeout: This parameter specifies the number of milliseconds in which the
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* stop operation should complete.
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*
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* An indication of whether the device was successfully stopped. SCI_SUCCESS
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* This value is returned if the transmission and reception for the device was
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* successfully stopped.
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*/
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enum sci_status scic_remote_device_stop(
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struct scic_sds_remote_device *remote_device,
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u32 timeout);
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/**
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* scic_remote_device_reset() - This method will reset the device making it
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* ready for operation. This method must be called anytime the device is
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* reset either through a SMP phy control or a port hard reset request.
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* @remote_device: This parameter specifies the device to be reset.
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*
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* This method does not actually cause the device hardware to be reset. This
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* method resets the software object so that it will be operational after a
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* device hardware reset completes. An indication of whether the device reset
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* was accepted. SCI_SUCCESS This value is returned if the device reset is
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* started.
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*/
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enum sci_status scic_remote_device_reset(
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struct scic_sds_remote_device *remote_device);
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/**
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* scic_remote_device_reset_complete() - This method informs the device object
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* that the reset operation is complete and the device can resume operation
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* again.
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* @remote_device: This parameter specifies the device which is to be informed
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* of the reset complete operation.
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*
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* An indication that the device is resuming operation. SCI_SUCCESS the device
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* is resuming operation.
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*/
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enum sci_status scic_remote_device_reset_complete(
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struct scic_sds_remote_device *remote_device);
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#define scic_remote_device_is_atapi(device_handle) false
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/**
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* enum scic_sds_remote_device_states - This enumeration depicts all the states
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* for the common remote device state machine.
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*
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*
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*/
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enum scic_sds_remote_device_states {
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/**
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* Simply the initial state for the base remote device state machine.
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*/
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SCI_BASE_REMOTE_DEVICE_STATE_INITIAL,
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/**
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* This state indicates that the remote device has successfully been
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* stopped. In this state no new IO operations are permitted.
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* This state is entered from the INITIAL state.
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* This state is entered from the STOPPING state.
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*/
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SCI_BASE_REMOTE_DEVICE_STATE_STOPPED,
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/**
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* This state indicates the the remote device is in the process of
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* becoming ready (i.e. starting). In this state no new IO operations
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* are permitted.
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* This state is entered from the STOPPED state.
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*/
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SCI_BASE_REMOTE_DEVICE_STATE_STARTING,
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/**
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* This state indicates the remote device is now ready. Thus, the user
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* is able to perform IO operations on the remote device.
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* This state is entered from the STARTING state.
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*/
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SCI_BASE_REMOTE_DEVICE_STATE_READY,
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/**
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* This is the idle substate for the stp remote device. When there are no
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* active IO for the device it is is in this state.
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*/
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SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE,
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/**
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* This is the command state for for the STP remote device. This state is
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* entered when the device is processing a non-NCQ command. The device object
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* will fail any new start IO requests until this command is complete.
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*/
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SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD,
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/**
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* This is the NCQ state for the STP remote device. This state is entered
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* when the device is processing an NCQ reuqest. It will remain in this state
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* so long as there is one or more NCQ requests being processed.
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*/
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SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ,
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/**
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* This is the NCQ error state for the STP remote device. This state is
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* entered when an SDB error FIS is received by the device object while in the
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* NCQ state. The device object will only accept a READ LOG command while in
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* this state.
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*/
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SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR,
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/**
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* This is the READY substate indicates the device is waiting for the RESET task
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* coming to be recovered from certain hardware specific error.
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*/
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SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET,
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/**
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* This is the ready operational substate for the remote device. This is the
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* normal operational state for a remote device.
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*/
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SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE,
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/**
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* This is the suspended state for the remote device. This is the state that
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* the device is placed in when a RNC suspend is received by the SCU hardware.
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*/
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SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD,
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2011-04-27 17:32:45 -06:00
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/**
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* This state indicates that the remote device is in the process of
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* stopping. In this state no new IO operations are permitted, but
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* existing IO operations are allowed to complete.
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* This state is entered from the READY state.
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* This state is entered from the FAILED state.
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*/
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SCI_BASE_REMOTE_DEVICE_STATE_STOPPING,
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/**
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* This state indicates that the remote device has failed.
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* In this state no new IO operations are permitted.
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* This state is entered from the INITIALIZING state.
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* This state is entered from the READY state.
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*/
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SCI_BASE_REMOTE_DEVICE_STATE_FAILED,
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/**
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* This state indicates the device is being reset.
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* In this state no new IO operations are permitted.
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* This state is entered from the READY state.
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*/
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SCI_BASE_REMOTE_DEVICE_STATE_RESETTING,
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/**
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* Simply the final state for the base remote device state machine.
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*/
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SCI_BASE_REMOTE_DEVICE_STATE_FINAL,
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2011-04-22 20:18:03 -06:00
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};
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static inline struct scic_sds_remote_device *rnc_to_dev(struct scic_sds_remote_node_context *rnc)
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{
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struct scic_sds_remote_device *sci_dev;
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sci_dev = container_of(rnc, typeof(*sci_dev), rnc);
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return sci_dev;
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}
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2011-04-28 16:06:21 -06:00
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static inline struct isci_remote_device *sci_dev_to_idev(struct scic_sds_remote_device *sci_dev)
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2011-04-21 19:44:45 -06:00
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{
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struct isci_remote_device *idev = container_of(sci_dev, typeof(*idev), sci);
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2011-04-28 16:06:21 -06:00
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return idev;
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}
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static inline struct domain_device *sci_dev_to_domain(struct scic_sds_remote_device *sci_dev)
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{
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return sci_dev_to_idev(sci_dev)->domain_dev;
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2011-04-21 19:44:45 -06:00
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}
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static inline bool dev_is_expander(struct domain_device *dev)
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{
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return dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV;
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}
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2011-04-22 20:18:03 -06:00
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/**
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* scic_sds_remote_device_increment_request_count() -
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*
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* This macro incrments the request count for this device
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*/
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#define scic_sds_remote_device_increment_request_count(sci_dev) \
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((sci_dev)->started_request_count++)
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/**
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* scic_sds_remote_device_decrement_request_count() -
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*
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* This macro decrements the request count for this device. This count will
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* never decrment past 0.
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*/
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#define scic_sds_remote_device_decrement_request_count(sci_dev) \
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((sci_dev)->started_request_count > 0 ? \
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(sci_dev)->started_request_count-- : 0)
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/**
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* scic_sds_remote_device_get_request_count() -
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*
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* This is a helper macro to return the current device request count.
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*/
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#define scic_sds_remote_device_get_request_count(sci_dev) \
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((sci_dev)->started_request_count)
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/**
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* scic_sds_remote_device_get_port() -
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*
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* This macro returns the owning port of this remote device obejct.
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*/
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#define scic_sds_remote_device_get_port(sci_dev) \
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((sci_dev)->owning_port)
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/**
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* scic_sds_remote_device_get_controller() -
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*
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* This macro returns the controller object that contains this device object
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*/
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#define scic_sds_remote_device_get_controller(sci_dev) \
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scic_sds_port_get_controller(scic_sds_remote_device_get_port(sci_dev))
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/**
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* scic_sds_remote_device_get_port() -
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*
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* This macro returns the owning port of this device
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*/
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#define scic_sds_remote_device_get_port(sci_dev) \
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((sci_dev)->owning_port)
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/**
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* scic_sds_remote_device_get_sequence() -
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*
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* This macro returns the remote device sequence value
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*/
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#define scic_sds_remote_device_get_sequence(sci_dev) \
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(\
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scic_sds_remote_device_get_controller(sci_dev)-> \
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remote_device_sequence[(sci_dev)->rnc.remote_node_index] \
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)
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/**
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* scic_sds_remote_device_get_controller_peg() -
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*
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* This macro returns the controllers protocol engine group
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*/
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#define scic_sds_remote_device_get_controller_peg(sci_dev) \
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(\
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scic_sds_controller_get_protocol_engine_group(\
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scic_sds_port_get_controller(\
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scic_sds_remote_device_get_port(sci_dev) \
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) \
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) \
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)
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/**
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* scic_sds_remote_device_get_index() -
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*
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* This macro returns the remote node index for this device object
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*/
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#define scic_sds_remote_device_get_index(sci_dev) \
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((sci_dev)->rnc.remote_node_index)
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/**
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* scic_sds_remote_device_build_command_context() -
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*
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* This macro builds a remote device context for the SCU post request operation
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*/
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#define scic_sds_remote_device_build_command_context(device, command) \
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((command) \
|
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| (scic_sds_remote_device_get_controller_peg((device)) << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) \
|
2011-04-26 12:44:06 -06:00
|
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| ((device)->owning_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) \
|
2011-04-22 20:18:03 -06:00
|
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| (scic_sds_remote_device_get_index((device))) \
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)
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/**
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* scic_sds_remote_device_set_working_request() -
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*
|
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|
* This macro makes the working request assingment for the remote device
|
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|
|
* object. To clear the working request use this macro with a NULL request
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* object.
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|
|
*/
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|
|
#define scic_sds_remote_device_set_working_request(device, request) \
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|
|
((device)->working_request = (request))
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|
enum sci_status scic_sds_remote_device_frame_handler(
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|
|
struct scic_sds_remote_device *sci_dev,
|
|
|
|
u32 frame_index);
|
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|
|
enum sci_status scic_sds_remote_device_event_handler(
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|
|
struct scic_sds_remote_device *sci_dev,
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|
|
u32 event_code);
|
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|
|
enum sci_status scic_sds_remote_device_start_io(
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|
|
|
struct scic_sds_controller *controller,
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|
|
struct scic_sds_remote_device *sci_dev,
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|
|
struct scic_sds_request *io_request);
|
|
|
|
|
2011-04-27 17:32:45 -06:00
|
|
|
enum sci_status scic_sds_remote_device_start_task(
|
2011-04-22 20:18:03 -06:00
|
|
|
struct scic_sds_controller *controller,
|
|
|
|
struct scic_sds_remote_device *sci_dev,
|
|
|
|
struct scic_sds_request *io_request);
|
|
|
|
|
2011-04-27 17:32:45 -06:00
|
|
|
enum sci_status scic_sds_remote_device_complete_io(
|
|
|
|
struct scic_sds_controller *controller,
|
|
|
|
struct scic_sds_remote_device *sci_dev,
|
|
|
|
struct scic_sds_request *io_request);
|
2011-04-22 20:18:03 -06:00
|
|
|
|
|
|
|
enum sci_status scic_sds_remote_device_suspend(
|
|
|
|
struct scic_sds_remote_device *sci_dev,
|
|
|
|
u32 suspend_type);
|
|
|
|
|
|
|
|
void scic_sds_remote_device_post_request(
|
|
|
|
struct scic_sds_remote_device *sci_dev,
|
|
|
|
u32 request);
|
|
|
|
|
|
|
|
#define scic_sds_remote_device_is_atapi(sci_dev) false
|
|
|
|
|
2011-07-02 23:56:22 -06:00
|
|
|
#endif /* !defined(_ISCI_REMOTE_DEVICE_H_) */
|