diff options
Diffstat (limited to 'kernel/drivers/scsi/lpfc/lpfc_compat.h')
| -rw-r--r-- | kernel/drivers/scsi/lpfc/lpfc_compat.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/kernel/drivers/scsi/lpfc/lpfc_compat.h b/kernel/drivers/scsi/lpfc/lpfc_compat.h new file mode 100644 index 000000000..c88e556ea --- /dev/null +++ b/kernel/drivers/scsi/lpfc/lpfc_compat.h @@ -0,0 +1,96 @@ +/******************************************************************* + * This file is part of the Emulex Linux Device Driver for * + * Fibre Channel Host Bus Adapters. * + * Copyright (C) 2004-2011 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) +{ + /* 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 */ |