[mirror_ubuntu-artful-kernel.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) 2017 Broadcom. All Rights Reserved. The term      *
 * “Broadcom” refers to Broadcom Limited and/or its subsidiaries.  *
 * Copyright (C) 2004-2011 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.broadcom.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)
{
	/* convert bytes in argument list to word count for copy function */
	__iowrite32_copy(dest, src, bytes / sizeof(uint32_t));
}

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	3	* Fibre Channel Host Bus Adapters. *
d080abe0 JS	4	* Copyright (C) 2017 Broadcom. All Rights Reserved. The term *
d080abe0 JS	5	* “Broadcom” refers to Broadcom Limited and/or its subsidiaries. *
2e90f4b5	6	* Copyright (C) 2004-2011 Emulex. All rights reserved. *
c44ce173	7	* EMULEX and SLI are trademarks of Emulex. *
d080abe0	8	* www.broadcom.com *
dea3101e JB	9	* *
dea3101e JB	10	* This program is free software; you can redistribute it and/or *
c44ce173 JSEC	11	* modify it under the terms of version 2 of the GNU General *
	12	* Public License as published by the Free Software Foundation. *
	13	* This program is distributed in the hope that it will be useful. *
	14	* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
	15	* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
	16	* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
	17	* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
	18	* TO BE LEGALLY INVALID. See the GNU General Public License for *
	19	* more details, a copy of which can be found in the file COPYING *
	20	* included with this package. *
dea3101e JB	21	*******************************************************************/
	22
	23	/*
dea3101e JB	24	* This file provides macros to aid compilation in the Linux 2.4 kernel
	25	* over various platform architectures.
	26	*/
	27
	28	/*******************************************************************
	29	Note: HBA's SLI memory contains little-endian LW.
	30	Thus to access it from a little-endian host,
	31	memcpy_toio() and memcpy_fromio() can be used.
	32	However on a big-endian host, copy 4 bytes at a time,
	33	using writel() and readl().
	34	*******************************************************************/
44456d37	35	#include <asm/byteorder.h>
dea3101e	36
44456d37	37	#ifdef __BIG_ENDIAN
dea3101e JB	38
	39	static inline void
	40	lpfc_memcpy_to_slim(void __iomem dest, void src, unsigned int bytes)
	41	{
	42	uint32_t __iomem *dest32;
	43	uint32_t *src32;
	44	unsigned int four_bytes;
	45
	46
	47	dest32 = (uint32_t __iomem *) dest;
	48	src32 = (uint32_t *) src;
	49
	50	/* write input bytes, 4 bytes at a time */
	51	for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
	52	writel( *src32, dest32);
	53	readl(dest32); /* flush */
	54	dest32++;
	55	src32++;
	56	}
	57
	58	return;
	59	}
	60
	61	static inline void
	62	lpfc_memcpy_from_slim( void dest, void __iomem src, unsigned int bytes)
	63	{
	64	uint32_t *dest32;
	65	uint32_t __iomem *src32;
	66	unsigned int four_bytes;
	67
	68
	69	dest32 = (uint32_t *) dest;
	70	src32 = (uint32_t __iomem *) src;
	71
	72	/* read input bytes, 4 bytes at a time */
	73	for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
	74	*dest32 = readl( src32);
	75	dest32++;
	76	src32++;
	77	}
	78
	79	return;
	80	}
	81
	82	#else
	83
	84	static inline void
	85	lpfc_memcpy_to_slim( void __iomem dest, void src, unsigned int bytes)
	86	{
2e90f4b5 JS	87	/* convert bytes in argument list to word count for copy function */
2e90f4b5 JS	88	__iowrite32_copy(dest, src, bytes / sizeof(uint32_t));
dea3101e JB	89	}
	90
	91	static inline void
	92	lpfc_memcpy_from_slim( void dest, void __iomem src, unsigned int bytes)
	93	{
	94	/* actually returns 1 byte past dest */
	95	memcpy_fromio( dest, src, bytes);
	96	}
	97
	98	#endif /* __BIG_ENDIAN */