nilfs2: unbreak compat ioctl
[zen-stable.git] / drivers / scsi / lpfc / lpfc_compat.h
blob75e2e569dedefb343e585333559d8e577176d466
1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2005 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
6 * www.emulex.com *
7 * *
8 * This program is free software; you can redistribute it and/or *
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. *
19 *******************************************************************/
22 * This file provides macros to aid compilation in the Linux 2.4 kernel
23 * over various platform architectures.
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 *******************************************************************/
33 #include <asm/byteorder.h>
35 #ifdef __BIG_ENDIAN
37 static inline void
38 lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes)
40 uint32_t __iomem *dest32;
41 uint32_t *src32;
42 unsigned int four_bytes;
45 dest32 = (uint32_t __iomem *) dest;
46 src32 = (uint32_t *) src;
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++;
56 return;
59 static inline void
60 lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
62 uint32_t *dest32;
63 uint32_t __iomem *src32;
64 unsigned int four_bytes;
67 dest32 = (uint32_t *) dest;
68 src32 = (uint32_t __iomem *) src;
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++;
77 return;
80 #else
82 static inline void
83 lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes)
85 __iowrite32_copy(dest, src, bytes);
88 static inline void
89 lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
91 /* actually returns 1 byte past dest */
92 memcpy_fromio( dest, src, bytes);
95 #endif /* __BIG_ENDIAN */