PageRenderTime 6ms CodeModel.GetById 1ms app.highlight 3ms RepoModel.GetById 1ms app.codeStats 0ms

/drivers/scsi/lpfc/lpfc_compat.h

http://github.com/mirrors/linux
C Header | 98 lines | 45 code | 17 blank | 36 comment | 2 complexity | bd68eeb779ab0b72d07704e1ef992667 MD5 | raw file
 1/*******************************************************************
 2 * This file is part of the Emulex Linux Device Driver for         *
 3 * Fibre Channel Host Bus Adapters.                                *
 4 * Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term *
 5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
 6 * Copyright (C) 2004-2011 Emulex.  All rights reserved.           *
 7 * EMULEX and SLI are trademarks of Emulex.                        *
 8 * www.broadcom.com                                                *
 9 *                                                                 *
10 * This program is free software; you can redistribute it and/or   *
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.                                     *
21 *******************************************************************/
22
23/*
24 * This file provides macros to aid compilation in the Linux 2.4 kernel
25 * over various platform architectures.
26 */
27
28/*******************************************************************
29Note: HBA's SLI memory contains little-endian LW.
30Thus to access it from a little-endian host,
31memcpy_toio() and memcpy_fromio() can be used.
32However on a big-endian host, copy 4 bytes at a time,
33using writel() and readl().
34 *******************************************************************/
35#include <asm/byteorder.h>
36
37#ifdef __BIG_ENDIAN
38
39static inline void
40lpfc_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
61static inline void
62lpfc_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
84static inline void
85lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes)
86{
87	/* convert bytes in argument list to word count for copy function */
88	__iowrite32_copy(dest, src, bytes / sizeof(uint32_t));
89}
90
91static inline void
92lpfc_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 */