projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ccfe27d7 MS |
1 | /* |
| 2 | * Implements the generic device dma API for microblaze and the pci | |
| 3 | * | |
| 4 | * Copyright (C) 2009-2010 Michal Simek <monstr@monstr.eu> | |
| 5 | * Copyright (C) 2009-2010 PetaLogix | |
| 6 | * | |
| 7 | * This file is subject to the terms and conditions of the GNU General | |
| 8 | * Public License. See the file COPYING in the main directory of this | |
| 9 | * archive for more details. | |
| 10 | * | |
| 11 | * This file is base on powerpc and x86 dma-mapping.h versions | |
| 12 | * Copyright (C) 2004 IBM | |
| 13 | */ | |
| 14 | ||
| 15 | #ifndef _ASM_MICROBLAZE_DMA_MAPPING_H | |
| 16 | #define _ASM_MICROBLAZE_DMA_MAPPING_H | |
| 17 | ||
| 18 | /* | |
| 395cf969 | 19 | * See Documentation/DMA-API-HOWTO.txt and |
| ccfe27d7 MS |
20 | * Documentation/DMA-API.txt for documentation. |
| 21 | */ | |
| 22 | ||
| 23 | #include <linux/types.h> | |
| 24 | #include <linux/cache.h> | |
| 25 | #include <linux/mm.h> | |
| 26 | #include <linux/scatterlist.h> | |
| 27 | #include <linux/dma-debug.h> | |
| ccfe27d7 | 28 | #include <asm/io.h> |
| cf560c18 | 29 | #include <asm/cacheflush.h> |
| ccfe27d7 MS |
30 | |
| 31 | #define DMA_ERROR_CODE (~(dma_addr_t)0x0) | |
| 32 | ||
| 33 | #define __dma_alloc_coherent(dev, gfp, size, handle) NULL | |
| 34 | #define __dma_free_coherent(size, addr) ((void)0) | |
| ccfe27d7 | 35 | |
| ccfe27d7 MS |
36 | /* |
| 37 | * Available generic sets of operations | |
| 38 | */ | |
| 39 | extern struct dma_map_ops dma_direct_ops; | |
| 40 | ||
| 41 | static inline struct dma_map_ops *get_dma_ops(struct device *dev) | |
| 42 | { | |
| 3b3b6853 | 43 | return &dma_direct_ops; |
| ccfe27d7 MS |
44 | } |
| 45 | ||
| cf560c18 EB |
46 | static inline void __dma_sync(unsigned long paddr, |
| 47 | size_t size, enum dma_data_direction direction) | |
| 48 | { | |
| 49 | switch (direction) { | |
| 50 | case DMA_TO_DEVICE: | |
| 51 | case DMA_BIDIRECTIONAL: | |
| 52 | flush_dcache_range(paddr, paddr + size); | |
| 53 | break; | |
| 54 | case DMA_FROM_DEVICE: | |
| 55 | invalidate_dcache_range(paddr, paddr + size); | |
| 56 | break; | |
| 57 | default: | |
| 58 | BUG(); | |
| 59 | } | |
| 60 | } | |
| 61 | ||
| ccfe27d7 MS |
62 | static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
| 63 | enum dma_data_direction direction) | |
| 64 | { | |
| 65 | BUG_ON(direction == DMA_NONE); | |
| cf560c18 | 66 | __dma_sync(virt_to_phys(vaddr), size, (int)direction); |
| ccfe27d7 MS |
67 | } |
| 68 | ||
| 69 | #endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */ |