| /* |
| * include/asm-xtensa/scatterlist.h |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 2001 - 2005 Tensilica Inc. |
| */ |
| |
| #ifndef _XTENSA_SCATTERLIST_H |
| #define _XTENSA_SCATTERLIST_H |
| |
| struct scatterlist { |
| struct page *page; |
| unsigned int offset; |
| dma_addr_t dma_address; |
| unsigned int length; |
| }; |
| |
| /* |
| * These macros should be used after a pci_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) |
| #define sg_dma_len(sg) ((sg)->length) |
| |
| |
| #define ISA_DMA_THRESHOLD (~0UL) |
| |
| #endif /* _XTENSA_SCATTERLIST_H */ |
