[net-next-2.6.git] / drivers / scsi / lpfc / lpfc_compat.h

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2005 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 *                                                                 *
 * 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. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

/*
 * This file provides macros to aid compilation in the Linux 2.4 kernel
 * over various platform architectures.
 */

/*******************************************************************
Note: HBA's SLI memory contains little-endian LW.
Thus to access it from a little-endian host,
memcpy_toio() and memcpy_fromio() can be used.
However on a big-endian host, copy 4 bytes at a time,
using writel() and readl().
 *******************************************************************/
#include <asm/byteorder.h>

#ifdef __BIG_ENDIAN

static inline void
lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes)
{
	uint32_t __iomem *dest32;
	uint32_t *src32;
	unsigned int four_bytes;


	dest32  = (uint32_t __iomem *) dest;
	src32  = (uint32_t *) src;

	/* write input bytes, 4 bytes at a time */
	for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
		writel( *src32, dest32);
		readl(dest32); /* flush */
		dest32++;
		src32++;
	}

	return;
}

static inline void
lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
{
	uint32_t *dest32;
	uint32_t __iomem *src32;
	unsigned int four_bytes;


	dest32  = (uint32_t *) dest;
	src32  = (uint32_t __iomem *) src;

	/* read input bytes, 4 bytes at a time */
	for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
		*dest32 = readl( src32);
		dest32++;
		src32++;
	}

	return;
}

#else

static inline void
lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes)
{
	__iowrite32_copy(dest, src, bytes);
}

static inline void
lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
{
	/* actually returns 1 byte past dest */
	memcpy_fromio( dest, src, bytes);
}

#endif	/* __BIG_ENDIAN */
Commit	Line	Data
dea3101e JB	1	/*******************************************************************
dea3101e JB	2	* This file is part of the Emulex Linux Device Driver for *
c44ce173 JSEC	3	* Fibre Channel Host Bus Adapters. *
	4	* Copyright (C) 2004-2005 Emulex. All rights reserved. *
	5	* EMULEX and SLI are trademarks of Emulex. *
dea3101e JB	6	* www.emulex.com *
	7	* *
	8	* This program is free software; you can redistribute it and/or *
c44ce173 JSEC	9	* modify it under the terms of version 2 of the GNU General *
	10	* Public License as published by the Free Software Foundation. *
	11	* This program is distributed in the hope that it will be useful. *
	12	* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
	13	* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
	14	* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
	15	* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
	16	* TO BE LEGALLY INVALID. See the GNU General Public License for *
	17	* more details, a copy of which can be found in the file COPYING *
	18	* included with this package. *
dea3101e JB	19	*******************************************************************/
	20
	21	/*
dea3101e JB	22	* This file provides macros to aid compilation in the Linux 2.4 kernel
	23	* over various platform architectures.
	24	*/
	25
	26	/*******************************************************************
	27	Note: HBA's SLI memory contains little-endian LW.
	28	Thus to access it from a little-endian host,
	29	memcpy_toio() and memcpy_fromio() can be used.
	30	However on a big-endian host, copy 4 bytes at a time,
	31	using writel() and readl().
	32	*******************************************************************/
44456d37	33	#include <asm/byteorder.h>
dea3101e	34
44456d37	35	#ifdef __BIG_ENDIAN
dea3101e JB	36
	37	static inline void
	38	lpfc_memcpy_to_slim(void __iomem dest, void src, unsigned int bytes)
	39	{
	40	uint32_t __iomem *dest32;
	41	uint32_t *src32;
	42	unsigned int four_bytes;
	43
	44
	45	dest32 = (uint32_t __iomem *) dest;
	46	src32 = (uint32_t *) src;
	47
	48	/* write input bytes, 4 bytes at a time */
	49	for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
	50	writel( *src32, dest32);
	51	readl(dest32); /* flush */
	52	dest32++;
	53	src32++;
	54	}
	55
	56	return;
	57	}
	58
	59	static inline void
	60	lpfc_memcpy_from_slim( void dest, void __iomem src, unsigned int bytes)
	61	{
	62	uint32_t *dest32;
	63	uint32_t __iomem *src32;
	64	unsigned int four_bytes;
	65
	66
	67	dest32 = (uint32_t *) dest;
	68	src32 = (uint32_t __iomem *) src;
	69
	70	/* read input bytes, 4 bytes at a time */
	71	for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
	72	*dest32 = readl( src32);
	73	dest32++;
	74	src32++;
	75	}
	76
	77	return;
	78	}
	79
	80	#else
	81
	82	static inline void
	83	lpfc_memcpy_to_slim( void __iomem dest, void src, unsigned int bytes)
	84	{
bc73905a	85	__iowrite32_copy(dest, src, bytes);
dea3101e JB	86	}
	87
	88	static inline void
	89	lpfc_memcpy_from_slim( void dest, void __iomem src, unsigned int bytes)
	90	{
	91	/* actually returns 1 byte past dest */
	92	memcpy_fromio( dest, src, bytes);
	93	}
	94
	95	#endif /* __BIG_ENDIAN */