| Aurelien Jacquiot | 14aa7e8 | 2011-10-04 12:17:19 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Port on Texas Instruments TMS320C6x architecture |
| 3 | * |
| 4 | * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated |
| 5 | * Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | */ |
| 12 | #ifndef _ASM_C6X_DMA_MAPPING_H |
| 13 | #define _ASM_C6X_DMA_MAPPING_H |
| 14 | |
| 15 | #include <linux/dma-debug.h> |
| 16 | #include <asm-generic/dma-coherent.h> |
| 17 | |
| 18 | #define dma_supported(d, m) 1 |
| 19 | |
| 20 | static inline int dma_set_mask(struct device *dev, u64 dma_mask) |
| 21 | { |
| 22 | if (!dev->dma_mask || !dma_supported(dev, dma_mask)) |
| 23 | return -EIO; |
| 24 | |
| 25 | *dev->dma_mask = dma_mask; |
| 26 | |
| 27 | return 0; |
| 28 | } |
| 29 | |
| 30 | /* |
| 31 | * DMA errors are defined by all-bits-set in the DMA address. |
| 32 | */ |
| 33 | static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
| 34 | { |
| 35 | return dma_addr == ~0; |
| 36 | } |
| 37 | |
| 38 | extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr, |
| 39 | size_t size, enum dma_data_direction dir); |
| 40 | |
| 41 | extern void dma_unmap_single(struct device *dev, dma_addr_t handle, |
| 42 | size_t size, enum dma_data_direction dir); |
| 43 | |
| 44 | extern int dma_map_sg(struct device *dev, struct scatterlist *sglist, |
| 45 | int nents, enum dma_data_direction direction); |
| 46 | |
| 47 | extern void dma_unmap_sg(struct device *dev, struct scatterlist *sglist, |
| 48 | int nents, enum dma_data_direction direction); |
| 49 | |
| 50 | static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, |
| 51 | unsigned long offset, size_t size, |
| 52 | enum dma_data_direction dir) |
| 53 | { |
| 54 | dma_addr_t handle; |
| 55 | |
| 56 | handle = dma_map_single(dev, page_address(page) + offset, size, dir); |
| 57 | |
| 58 | debug_dma_map_page(dev, page, offset, size, dir, handle, false); |
| 59 | |
| 60 | return handle; |
| 61 | } |
| 62 | |
| 63 | static inline void dma_unmap_page(struct device *dev, dma_addr_t handle, |
| 64 | size_t size, enum dma_data_direction dir) |
| 65 | { |
| 66 | dma_unmap_single(dev, handle, size, dir); |
| 67 | |
| 68 | debug_dma_unmap_page(dev, handle, size, dir, false); |
| 69 | } |
| 70 | |
| 71 | extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, |
| 72 | size_t size, enum dma_data_direction dir); |
| 73 | |
| 74 | extern void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, |
| 75 | size_t size, |
| 76 | enum dma_data_direction dir); |
| 77 | |
| 78 | extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, |
| 79 | int nents, enum dma_data_direction dir); |
| 80 | |
| 81 | extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, |
| 82 | int nents, enum dma_data_direction dir); |
| 83 | |
| 84 | extern void coherent_mem_init(u32 start, u32 size); |
| 85 | extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t); |
| 86 | extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t); |
| 87 | |
| 88 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent((d), (s), (h), (f)) |
| 89 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent((d), (s), (v), (h)) |
| 90 | |
| 91 | #endif /* _ASM_C6X_DMA_MAPPING_H */ |