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/******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term * * “Broadcom” refers to Broadcom Inc. 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 */ |