linux-vybrid_public/drivers/scsi/isci/core/sci_util.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:
 *
 *   * 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.
 *   * Neither the name of Intel Corporation nor the names of its
 *     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
 * "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.
 */

#ifndef _SCI_UTIL_H_
#define _SCI_UTIL_H_

#include "scic_sds_request.h"

#define SCIC_BUILD_DWORD(char_buffer) \
	(\
		((char_buffer)[0] << 24) \
		| ((char_buffer)[1] << 16) \
		| ((char_buffer)[2] <<  8) \
		| ((char_buffer)[3]) \
	)

#define sci_cb_make_physical_address(physical_addr, addr_upper, addr_lower) \
	((physical_addr) = (addr_lower) | ((u64)addr_upper) << 32)

/**
 * sci_swab32_cpy - convert between scsi and scu-hardware byte format
 * @dest: receive the 4-byte endian swapped version of src
 * @src: word aligned source buffer
 *
 * scu hardware handles SSP/SMP control, response, and unidentified
 * frames in "big endian dword" order.  Regardless of host endian this
 * is always a swab32()-per-dword conversion of the standard definition,
 * i.e. single byte fields swapped and multi-byte fields in little-
 * endian
 */
static inline void sci_swab32_cpy(void *_dest, void *_src, ssize_t word_cnt)
{
	u32 *dest = _dest, *src = _src;

	while (--word_cnt >= 0)
		dest[word_cnt] = swab32(src[word_cnt]);
}

void *scic_request_get_virt_addr(struct scic_sds_request *sds_request,
				 dma_addr_t phys_addr);

dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sds_request,
					void *virt_addr);

#endif /* _SCI_UTIL_H_ */