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/*-
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * BSD LICENSE
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD: release/9.1.0/sys/dev/isci/scil/scu_remote_node_context.h 231689 2012-02-14 15:58:49Z jimharris $
 */
#ifndef __SCU_REMOTE_NODE_CONTEXT_HEADER__
#define __SCU_REMOTE_NODE_CONTEXT_HEADER__

/**
 * @file
 *
 * @brief This file contains the structures and constatns used by the SCU
 * hardware to describe a remote node context.
 */

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus

#include <dev/isci/scil/sci_types.h>

/**
 * @struct SSP_REMOTE_NODE_CONTEXT
 *
 * @brief This structure contains the SCU hardware definition for an SSP
 *       remote node.
 */
typedef struct SSP_REMOTE_NODE_CONTEXT
{
   // WORD 0

   /**
    * This field is the remote node index assigned for this remote node. All
    * remote nodes must have a unique remote node index. The value of the remote
    * node index can not exceed the maximum number of remote nodes reported in
    * the SCU device context capacity register.
    */
   U32 remote_node_index       :12;
   U32 reserved0_1             : 4;

   /**
    * This field tells the SCU hardware how many simultaneous connections that
    * this remote node will support.
    */
   U32 remote_node_port_width  : 4;

   /**
    * This field tells the SCU hardware which logical port to associate with this
    * remote node.
    */
   U32 logical_port_index      : 3;
   U32 reserved0_2             : 5;

   /**
    * This field will enable the I_T nexus loss timer for this remote node.
    */
   U32 nexus_loss_timer_enable : 1;

   /**
    * This field is the for driver debug only and is not used.
    */
   U32 check_bit               : 1;

   /**
    * This field must be set to TRUE when the hardware DMAs the remote node
    * context to the hardware SRAM.  When the remote node is being invalidated
    * this field must be set to FALSE.
    */
   U32 is_valid                : 1;

   /**
    * This field must be set to TRUE.
    */
   U32 is_remote_node_context  : 1;

   // WORD 1 - 2

   /**
    * This is the low word of the remote device SAS Address
    */
   U32 remote_sas_address_lo;

   /**
    * This field is the high word of the remote device SAS Address
    */
   U32 remote_sas_address_hi;

   // WORD 3
   /**
    * This field reprensets the function number assigned to this remote device.
    * This value must match the virtual function number that is being used to
    * communicate to the device.
    */
   U32 function_number         : 8;
   U32 reserved3_1             : 8;

   /**
    * This field provides the driver a way to cheat on the arbitration wait time
    * for this remote node.
    */
   U32 arbitration_wait_time   :16;

   // WORD 4
   /**
    * This field tells the SCU hardware how long this device may occupy the
    * connection before it must be closed.
    */
   U32 connection_occupancy_timeout  :16;

   /**
    * This field tells the SCU hardware how long to maintain a connection when
    * there are no frames being transmitted on the link.
    */
   U32 connection_inactivity_timeout :16;

   // WORD  5
   /**
    * This field allows the driver to cheat on the arbitration wait time for this
    * remote node.
    */
   U32 initial_arbitration_wait_time :16;

   /**
    * This field is tells the hardware what to program for the connection rate in
    * the open address frame.  See the SAS spec for valid values.
    */
   U32 oaf_connection_rate           : 4;

   /**
    * This field tells the SCU hardware what to program for the features in the
    * open address frame.  See the SAS spec for valid values.
    */
   U32 oaf_features                  : 4;

   /**
    * This field tells the SCU hardware what to use for the source zone group in
    * the open address frame.  See the SAS spec for more details on zoning.
    */
   U32 oaf_source_zone_group         : 8;

   // WORD 6
   /**
    * This field tells the SCU hardware what to use as the more capibilities in
    * the open address frame. See the SAS Spec for details.
    */
   U32 oaf_more_compatibility_features;

   // WORD 7
   U32 reserved7;

} SSP_REMOTE_NODE_CONTEXT_T;

/**
 * @struct STP_REMOTE_NODE_CONTEXT
 *
 * @brief This structure contains the SCU hardware definition for a STP remote
 *        node.
 *
 * @todo STP Targets are not yet supported so this definition is a placeholder
 *       until we do support them.
 */
typedef struct STP_REMOTE_NODE_CONTEXT
{
   /**
    * Placeholder data for the STP remote node.
    */
   U32 data[8];

} STP_REMOTE_NODE_CONTEXT_T;

/**
 * @union SCU_REMOTE_NODE_CONTEXT
 *
 * @brief This union combines the SAS and SATA remote node definitions.
 */
typedef union SCU_REMOTE_NODE_CONTEXT
{
   /**
    * SSP Remote Node
    */
   SSP_REMOTE_NODE_CONTEXT_T ssp;

   /**
    * STP Remote Node
    */
   STP_REMOTE_NODE_CONTEXT_T stp;

} SCU_REMOTE_NODE_CONTEXT_T;

#ifdef __cplusplus
}
#endif // __cplusplus

#endif // __SCU_REMOTE_NODE_CONTEXT_HEADER__

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