| Stephen Rothwell | 89edce0 | 2005-10-25 16:59:03 +1000 | [diff] [blame] | 1 | #ifndef _ASM_POWERPC_SCATTERLIST_H |
| 2 | #define _ASM_POWERPC_SCATTERLIST_H |
| 3 | /* |
| 4 | * Copyright (C) 2001 PPC64 Team, IBM Corp |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #ifdef __KERNEL__ |
| 13 | #include <linux/types.h> |
| 14 | #include <asm/dma.h> |
| 15 | |
| 16 | struct scatterlist { |
| Jens Axboe | d6ec084 | 2007-10-22 20:01:06 +0200 | [diff] [blame] | 17 | #ifdef CONFIG_DEBUG_SG |
| 18 | unsigned long sg_magic; |
| 19 | #endif |
| Jens Axboe | 18dabf4 | 2007-10-22 19:57:20 +0200 | [diff] [blame] | 20 | unsigned long page_link; |
| Stephen Rothwell | 89edce0 | 2005-10-25 16:59:03 +1000 | [diff] [blame] | 21 | unsigned int offset; |
| 22 | unsigned int length; |
| 23 | |
| 24 | /* For TCE support */ |
| 25 | dma_addr_t dma_address; |
| 26 | u32 dma_length; |
| 27 | }; |
| 28 | |
| 29 | /* |
| 30 | * These macros should be used after a dma_map_sg call has been done |
| 31 | * to get bus addresses of each of the SG entries and their lengths. |
| 32 | * You should only work with the number of sg entries pci_map_sg |
| 33 | * returns, or alternatively stop on the first sg_dma_len(sg) which |
| 34 | * is 0. |
| 35 | */ |
| 36 | #define sg_dma_address(sg) ((sg)->dma_address) |
| 37 | #ifdef __powerpc64__ |
| 38 | #define sg_dma_len(sg) ((sg)->dma_length) |
| 39 | #else |
| 40 | #define sg_dma_len(sg) ((sg)->length) |
| 41 | #endif |
| 42 | |
| 43 | #ifdef __powerpc64__ |
| 44 | #define ISA_DMA_THRESHOLD (~0UL) |
| 45 | #endif |
| 46 | |
| Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 47 | #define ARCH_HAS_SG_CHAIN |
| 48 | |
| Stephen Rothwell | 89edce0 | 2005-10-25 16:59:03 +1000 | [diff] [blame] | 49 | #endif /* __KERNEL__ */ |
| 50 | #endif /* _ASM_POWERPC_SCATTERLIST_H */ |