| /* |
| * Implements the generic device dma API for microblaze and the pci |
| * |
| * Copyright (C) 2009-2010 Michal Simek <monstr@monstr.eu> |
| * Copyright (C) 2009-2010 PetaLogix |
| * |
| * 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. |
| * |
| * This file is base on powerpc and x86 dma-mapping.h versions |
| * Copyright (C) 2004 IBM |
| */ |
| |
| #ifndef _ASM_MICROBLAZE_DMA_MAPPING_H |
| #define _ASM_MICROBLAZE_DMA_MAPPING_H |
| |
| /* |
| * See Documentation/DMA-API-HOWTO.txt and |
| * Documentation/DMA-API.txt for documentation. |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/cache.h> |
| #include <linux/mm.h> |
| #include <linux/scatterlist.h> |
| #include <linux/dma-debug.h> |
| #include <asm/io.h> |
| #include <asm/cacheflush.h> |
| |
| #define DMA_ERROR_CODE (~(dma_addr_t)0x0) |
| |
| #define __dma_alloc_coherent(dev, gfp, size, handle) NULL |
| #define __dma_free_coherent(size, addr) ((void)0) |
| |
| /* |
| * Available generic sets of operations |
| */ |
| extern struct dma_map_ops dma_direct_ops; |
| |
| static inline struct dma_map_ops *get_dma_ops(struct device *dev) |
| { |
| return &dma_direct_ops; |
| } |
| |
| static inline void __dma_sync(unsigned long paddr, |
| size_t size, enum dma_data_direction direction) |
| { |
| switch (direction) { |
| case DMA_TO_DEVICE: |
| case DMA_BIDIRECTIONAL: |
| flush_dcache_range(paddr, paddr + size); |
| break; |
| case DMA_FROM_DEVICE: |
| invalidate_dcache_range(paddr, paddr + size); |
| break; |
| default: |
| BUG(); |
| } |
| } |
| |
| static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| __dma_sync(virt_to_phys(vaddr), size, (int)direction); |
| } |
| |
| #endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */ |