projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 9a88cbb5 RB |
1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public | |
| 3 | * License. See the file "COPYING" in the main directory of this archive | |
| 4 | * for more details. | |
| 5 | * | |
| 6 | * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org> | |
| 7 | * | |
| 8 | */ | |
| 9 | #ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H | |
| 10 | #define __ASM_MACH_GENERIC_DMA_COHERENCE_H | |
| 11 | ||
| 12 | struct device; | |
| 13 | ||
| a9b6590c RB |
14 | static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, |
| 15 | size_t size) | |
| 9a88cbb5 RB |
16 | { |
| 17 | return virt_to_phys(addr); | |
| 18 | } | |
| 19 | ||
| a9b6590c RB |
20 | static inline dma_addr_t plat_map_dma_mem_page(struct device *dev, |
| 21 | struct page *page) | |
| 9a88cbb5 RB |
22 | { |
| 23 | return page_to_phys(page); | |
| 24 | } | |
| 25 | ||
| a9b6590c | 26 | static inline unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr) |
| 9a88cbb5 RB |
27 | { |
| 28 | return dma_addr; | |
| 29 | } | |
| 30 | ||
| 843aef49 | 31 | static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr) |
| 9a88cbb5 RB |
32 | { |
| 33 | } | |
| 34 | ||
| 843aef49 DD |
35 | static inline int plat_dma_supported(struct device *dev, u64 mask) |
| 36 | { | |
| 37 | /* | |
| 38 | * we fall back to GFP_DMA when the mask isn't all 1s, | |
| 39 | * so we can't guarantee allocations that must be | |
| 40 | * within a tighter range than GFP_DMA.. | |
| 41 | */ | |
| 42 | if (mask < DMA_BIT_MASK(24)) | |
| 43 | return 0; | |
| 44 | ||
| 45 | return 1; | |
| 46 | } | |
| 47 | ||
| 48 | static inline void plat_extra_sync_for_device(struct device *dev) | |
| 49 | { | |
| 50 | return; | |
| 51 | } | |
| 52 | ||
| 53 | static inline int plat_dma_mapping_error(struct device *dev, | |
| 54 | dma_addr_t dma_addr) | |
| 55 | { | |
| 56 | return 0; | |
| 57 | } | |
| 58 | ||
| 9a88cbb5 RB |
59 | static inline int plat_device_is_coherent(struct device *dev) |
| 60 | { | |
| 61 | #ifdef CONFIG_DMA_COHERENT | |
| 62 | return 1; | |
| 63 | #endif | |
| 64 | #ifdef CONFIG_DMA_NONCOHERENT | |
| 65 | return 0; | |
| 66 | #endif | |
| 67 | } | |
| 68 | ||
| 69 | #endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */ |