drivers/scsi/isci/scu_unsolicited_frame.h

/*
 * 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:
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 *     notice, this list of conditions and the following disclaimer.
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 */

/**
 * This field defines the SCU format of an unsolicited frame (UF).  A UF is a
 *    frame received by the SCU for which there is no known corresponding task
 *    context (TC).
 *
 *
 */

#ifndef _SCU_UNSOLICITED_FRAME_H_
#define _SCU_UNSOLICITED_FRAME_H_

#include <linux/string.h>

/**
 *
 *
 * This constant defines the number of DWORDS found the unsolicited frame
 * header data member.
 */
#define SCU_UNSOLICITED_FRAME_HEADER_DATA_DWORDS 15

/**
 * struct scu_unsolicited_frame_header -
 *
 * This structure delineates the format of an unsolicited frame header. The
 * first DWORD are UF attributes defined by the silicon architecture. The data
 * depicts actual header information received on the link.
 */
struct scu_unsolicited_frame_header {
	/**
	 * This field indicates if there is an Initiator Index Table entry with
	 * which this header is associated.
	 */
	u32 iit_exists:1;

	/**
	 * This field simply indicates the protocol type (i.e. SSP, STP, SMP).
	 */
	u32 protocol_type:3;

	/**
	 * This field indicates if the frame is an address frame (IAF or OAF)
	 * or if it is a information unit frame.
	 */
	u32 is_address_frame:1;

	/**
	 * This field simply indicates the connection rate at which the frame
	 * was received.
	 */
	u32 connection_rate:4;

	u32 reserved:23;

	/**
	 * This field represents the actual header data received on the link.
	 */
	u32 data[SCU_UNSOLICITED_FRAME_HEADER_DATA_DWORDS];

};

#endif /* _SCU_UNSOLICITED_FRAME_H_ */