From 89edce0b4e71f6f78e27d7c18c63e957469b74d3 Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Tue, 25 Oct 2005 16:59:03 +1000 Subject: [PATCH] powerpc: merge scatterlist.h This depends on the 64bit dma_addr_t patch. Signed-off-by: Stephen Rothwell Signed-off-by: Paul Mackerras --- include/asm-powerpc/scatterlist.h | 45 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 include/asm-powerpc/scatterlist.h (limited to 'include/asm-powerpc/scatterlist.h') diff --git a/include/asm-powerpc/scatterlist.h b/include/asm-powerpc/scatterlist.h new file mode 100644 index 000000000000..8c992d1491d4 --- /dev/null +++ b/include/asm-powerpc/scatterlist.h @@ -0,0 +1,45 @@ +#ifndef _ASM_POWERPC_SCATTERLIST_H +#define _ASM_POWERPC_SCATTERLIST_H +/* + * Copyright (C) 2001 PPC64 Team, IBM Corp + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifdef __KERNEL__ +#include +#include + +struct scatterlist { + struct page *page; + unsigned int offset; + unsigned int length; + + /* For TCE support */ + dma_addr_t dma_address; + u32 dma_length; +}; + +/* + * These macros should be used after a dma_map_sg call has been done + * to get bus addresses of each of the SG entries and their lengths. + * You should only work with the number of sg entries pci_map_sg + * returns, or alternatively stop on the first sg_dma_len(sg) which + * is 0. + */ +#define sg_dma_address(sg) ((sg)->dma_address) +#ifdef __powerpc64__ +#define sg_dma_len(sg) ((sg)->dma_length) +#else +#define sg_dma_len(sg) ((sg)->length) +#endif + +#ifdef __powerpc64__ +#define ISA_DMA_THRESHOLD (~0UL) +#endif + +#endif /* __KERNEL__ */ +#endif /* _ASM_POWERPC_SCATTERLIST_H */ -- cgit v1.2.3