projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| a39af6f7 JB |
1 | /* |
| 2 | * OpenRISC Linux | |
| 3 | * | |
| 4 | * Linux architectural port borrowing liberally from similar works of | |
| 5 | * others. All original copyrights apply as per the original source | |
| 6 | * declaration. | |
| 7 | * | |
| 8 | * OpenRISC implementation: | |
| 9 | * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> | |
| 10 | * | |
| 11 | * This program is free software; you can redistribute it and/or modify | |
| 12 | * it under the terms of the GNU General Public License as published by | |
| 13 | * the Free Software Foundation; either version 2 of the License, or | |
| 14 | * (at your option) any later version. | |
| 15 | */ | |
| 16 | ||
| 17 | #ifndef __ASM_OPENRISC_DMA_MAPPING_H | |
| 18 | #define __ASM_OPENRISC_DMA_MAPPING_H | |
| 19 | ||
| 20 | /* | |
| 21 | * See Documentation/PCI/PCI-DMA-mapping.txt and | |
| 22 | * Documentation/DMA-API.txt for documentation. | |
| 23 | * | |
| 24 | * This file is written with the intention of eventually moving over | |
| 25 | * to largely using asm-generic/dma-mapping-common.h in its place. | |
| 26 | */ | |
| 27 | ||
| 28 | #include <linux/dma-debug.h> | |
| 29 | #include <asm-generic/dma-coherent.h> | |
| 30 | #include <linux/kmemcheck.h> | |
| 31 | ||
| 32 | #define DMA_ERROR_CODE (~(dma_addr_t)0x0) | |
| 33 | ||
| 34 | int dma_mapping_error(struct device *dev, dma_addr_t dma_addr); | |
| 35 | ||
| 36 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) | |
| 37 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) | |
| 38 | ||
| 39 | void *or1k_dma_alloc_coherent(struct device *dev, size_t size, | |
| 40 | dma_addr_t *dma_handle, gfp_t flag); | |
| 41 | void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr, | |
| 42 | dma_addr_t dma_handle); | |
| 43 | dma_addr_t or1k_map_page(struct device *dev, struct page *page, | |
| 44 | unsigned long offset, size_t size, | |
| 45 | enum dma_data_direction dir, | |
| 46 | struct dma_attrs *attrs); | |
| 47 | void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle, | |
| 48 | size_t size, enum dma_data_direction dir, | |
| 49 | struct dma_attrs *attrs); | |
| 50 | void or1k_sync_single_for_cpu(struct device *dev, | |
| 51 | dma_addr_t dma_handle, size_t size, | |
| 52 | enum dma_data_direction dir); | |
| 53 | void or1k_sync_single_for_device(struct device *dev, | |
| 54 | dma_addr_t dma_handle, size_t size, | |
| 55 | enum dma_data_direction dir); | |
| 56 | ||
| 57 | static inline void *dma_alloc_coherent(struct device *dev, size_t size, | |
| 58 | dma_addr_t *dma_handle, gfp_t flag) | |
| 59 | { | |
| 60 | void *memory; | |
| 61 | ||
| 62 | memory = or1k_dma_alloc_coherent(dev, size, dma_handle, flag); | |
| 63 | ||
| 64 | debug_dma_alloc_coherent(dev, size, *dma_handle, memory); | |
| 65 | return memory; | |
| 66 | } | |
| 67 | ||
| 68 | static inline void dma_free_coherent(struct device *dev, size_t size, | |
| 69 | void *cpu_addr, dma_addr_t dma_handle) | |
| 70 | { | |
| 71 | debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); | |
| 72 | or1k_dma_free_coherent(dev, size, cpu_addr, dma_handle); | |
| 73 | } | |
| 74 | ||
| 75 | static inline dma_addr_t dma_map_single(struct device *dev, void *ptr, | |
| 76 | size_t size, | |
| 77 | enum dma_data_direction dir) | |
| 78 | { | |
| 79 | dma_addr_t addr; | |
| 80 | ||
| 81 | kmemcheck_mark_initialized(ptr, size); | |
| 82 | BUG_ON(!valid_dma_direction(dir)); | |
| 83 | addr = or1k_map_page(dev, virt_to_page(ptr), | |
| 84 | (unsigned long)ptr & ~PAGE_MASK, size, | |
| 85 | dir, NULL); | |
| 86 | debug_dma_map_page(dev, virt_to_page(ptr), | |
| 87 | (unsigned long)ptr & ~PAGE_MASK, size, | |
| 88 | dir, addr, true); | |
| 89 | return addr; | |
| 90 | } | |
| 91 | ||
| 92 | static inline void dma_unmap_single(struct device *dev, dma_addr_t addr, | |
| 93 | size_t size, | |
| 94 | enum dma_data_direction dir) | |
| 95 | { | |
| 96 | BUG_ON(!valid_dma_direction(dir)); | |
| 97 | or1k_unmap_page(dev, addr, size, dir, NULL); | |
| 98 | debug_dma_unmap_page(dev, addr, size, dir, true); | |
| 99 | } | |
| 100 | ||
| 101 | static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, | |
| 102 | size_t size, | |
| 103 | enum dma_data_direction dir) | |
| 104 | { | |
| 105 | BUG_ON(!valid_dma_direction(dir)); | |
| 106 | or1k_sync_single_for_cpu(dev, addr, size, dir); | |
| 107 | debug_dma_sync_single_for_cpu(dev, addr, size, dir); | |
| 108 | } | |
| 109 | ||
| 110 | static inline void dma_sync_single_for_device(struct device *dev, | |
| 111 | dma_addr_t addr, size_t size, | |
| 112 | enum dma_data_direction dir) | |
| 113 | { | |
| 114 | BUG_ON(!valid_dma_direction(dir)); | |
| 115 | or1k_sync_single_for_device(dev, addr, size, dir); | |
| 116 | debug_dma_sync_single_for_device(dev, addr, size, dir); | |
| 117 | } | |
| 118 | ||
| 119 | static inline int dma_supported(struct device *dev, u64 dma_mask) | |
| 120 | { | |
| 121 | /* Support 32 bit DMA mask exclusively */ | |
| 122 | return dma_mask == 0xffffffffULL; | |
| 123 | } | |
| 124 | ||
| 125 | static inline int dma_set_mask(struct device *dev, u64 dma_mask) | |
| 126 | { | |
| 127 | if (!dev->dma_mask || !dma_supported(dev, dma_mask)) | |
| 128 | return -EIO; | |
| 129 | ||
| 130 | *dev->dma_mask = dma_mask; | |
| 131 | ||
| 132 | return 0; | |
| 133 | } | |
| 134 | #endif /* __ASM_OPENRISC_DMA_MAPPING_H */ |