H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_DMA_MAPPING_H |
| 2 | #define _ASM_X86_DMA_MAPPING_H |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 3 | |
| 4 | /* |
Randy Dunlap | 5872fb9 | 2009-01-29 16:28:02 -0800 | [diff] [blame] | 5 | * IOMMU interface. See Documentation/PCI/PCI-DMA-mapping.txt and |
| 6 | * Documentation/DMA-API.txt for documentation. |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include <linux/scatterlist.h> |
FUJITA Tomonori | abe6602 | 2009-01-05 23:47:21 +0900 | [diff] [blame] | 10 | #include <linux/dma-attrs.h> |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 11 | #include <asm/io.h> |
| 12 | #include <asm/swiotlb.h> |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 13 | #include <asm-generic/dma-coherent.h> |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 14 | |
Glauber Costa | 7c18341 | 2008-03-25 18:36:36 -0300 | [diff] [blame] | 15 | extern dma_addr_t bad_dma_address; |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 16 | extern int iommu_merge; |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 17 | extern struct device x86_dma_fallback_dev; |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 18 | extern int panic_on_overflow; |
Glauber Costa | 7c18341 | 2008-03-25 18:36:36 -0300 | [diff] [blame] | 19 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 20 | extern struct dma_map_ops *dma_ops; |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 21 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 22 | static inline struct dma_map_ops *get_dma_ops(struct device *dev) |
Glauber Costa | c786df0 | 2008-03-25 18:36:37 -0300 | [diff] [blame] | 23 | { |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 24 | #ifdef CONFIG_X86_32 |
| 25 | return dma_ops; |
| 26 | #else |
| 27 | if (unlikely(!dev) || !dev->archdata.dma_ops) |
| 28 | return dma_ops; |
| 29 | else |
| 30 | return dev->archdata.dma_ops; |
Jeremy Fitzhardinge | cfb80c9 | 2008-12-16 12:17:36 -0800 | [diff] [blame] | 31 | #endif |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 32 | } |
| 33 | |
| 34 | /* Make sure we keep the same behaviour */ |
| 35 | static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
| 36 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 37 | struct dma_map_ops *ops = get_dma_ops(dev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 38 | if (ops->mapping_error) |
| 39 | return ops->mapping_error(dev, dma_addr); |
Glauber Costa | c786df0 | 2008-03-25 18:36:37 -0300 | [diff] [blame] | 40 | |
Thomas Bogendoerfer | 7b1dedc | 2008-11-29 13:46:27 +0100 | [diff] [blame] | 41 | return (dma_addr == bad_dma_address); |
Glauber Costa | c786df0 | 2008-03-25 18:36:37 -0300 | [diff] [blame] | 42 | } |
| 43 | |
Glauber Costa | 8d396de | 2008-03-25 18:36:31 -0300 | [diff] [blame] | 44 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
| 45 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 46 | #define dma_is_consistent(d, h) (1) |
Glauber Costa | 8d396de | 2008-03-25 18:36:31 -0300 | [diff] [blame] | 47 | |
Glauber Costa | 802c1f6 | 2008-03-25 18:36:34 -0300 | [diff] [blame] | 48 | extern int dma_supported(struct device *hwdev, u64 mask); |
| 49 | extern int dma_set_mask(struct device *dev, u64 mask); |
| 50 | |
FUJITA Tomonori | 9f6ac57 | 2008-09-24 20:48:35 +0900 | [diff] [blame] | 51 | extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, |
| 52 | dma_addr_t *dma_addr, gfp_t flag); |
| 53 | |
Glauber Costa | 22456b9 | 2008-03-25 18:36:21 -0300 | [diff] [blame] | 54 | static inline dma_addr_t |
| 55 | dma_map_single(struct device *hwdev, void *ptr, size_t size, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 56 | enum dma_data_direction dir) |
Glauber Costa | 22456b9 | 2008-03-25 18:36:21 -0300 | [diff] [blame] | 57 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 58 | struct dma_map_ops *ops = get_dma_ops(hwdev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 59 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 60 | BUG_ON(!valid_dma_direction(dir)); |
FUJITA Tomonori | d7dff84 | 2009-01-05 23:47:28 +0900 | [diff] [blame] | 61 | return ops->map_page(hwdev, virt_to_page(ptr), |
| 62 | (unsigned long)ptr & ~PAGE_MASK, size, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 63 | dir, NULL); |
Glauber Costa | 22456b9 | 2008-03-25 18:36:21 -0300 | [diff] [blame] | 64 | } |
| 65 | |
Glauber Costa | 0cb0ae6 | 2008-03-25 18:36:22 -0300 | [diff] [blame] | 66 | static inline void |
| 67 | dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 68 | enum dma_data_direction dir) |
Glauber Costa | 0cb0ae6 | 2008-03-25 18:36:22 -0300 | [diff] [blame] | 69 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 70 | struct dma_map_ops *ops = get_dma_ops(dev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 71 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 72 | BUG_ON(!valid_dma_direction(dir)); |
FUJITA Tomonori | d7dff84 | 2009-01-05 23:47:28 +0900 | [diff] [blame] | 73 | if (ops->unmap_page) |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 74 | ops->unmap_page(dev, addr, size, dir, NULL); |
Glauber Costa | 0cb0ae6 | 2008-03-25 18:36:22 -0300 | [diff] [blame] | 75 | } |
| 76 | |
Glauber Costa | 16a3ce9 | 2008-03-25 18:36:23 -0300 | [diff] [blame] | 77 | static inline int |
| 78 | dma_map_sg(struct device *hwdev, struct scatterlist *sg, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 79 | int nents, enum dma_data_direction dir) |
Glauber Costa | 16a3ce9 | 2008-03-25 18:36:23 -0300 | [diff] [blame] | 80 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 81 | struct dma_map_ops *ops = get_dma_ops(hwdev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 82 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 83 | BUG_ON(!valid_dma_direction(dir)); |
| 84 | return ops->map_sg(hwdev, sg, nents, dir, NULL); |
Glauber Costa | 16a3ce9 | 2008-03-25 18:36:23 -0300 | [diff] [blame] | 85 | } |
Glauber Costa | 72c784f | 2008-03-25 18:36:24 -0300 | [diff] [blame] | 86 | |
| 87 | static inline void |
| 88 | dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 89 | enum dma_data_direction dir) |
Glauber Costa | 72c784f | 2008-03-25 18:36:24 -0300 | [diff] [blame] | 90 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 91 | struct dma_map_ops *ops = get_dma_ops(hwdev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 92 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 93 | BUG_ON(!valid_dma_direction(dir)); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 94 | if (ops->unmap_sg) |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 95 | ops->unmap_sg(hwdev, sg, nents, dir, NULL); |
Glauber Costa | 72c784f | 2008-03-25 18:36:24 -0300 | [diff] [blame] | 96 | } |
Glauber Costa | c01dd8c | 2008-03-25 18:36:25 -0300 | [diff] [blame] | 97 | |
| 98 | static inline void |
| 99 | dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 100 | size_t size, enum dma_data_direction dir) |
Glauber Costa | c01dd8c | 2008-03-25 18:36:25 -0300 | [diff] [blame] | 101 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 102 | struct dma_map_ops *ops = get_dma_ops(hwdev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 103 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 104 | BUG_ON(!valid_dma_direction(dir)); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 105 | if (ops->sync_single_for_cpu) |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 106 | ops->sync_single_for_cpu(hwdev, dma_handle, size, dir); |
Glauber Costa | c01dd8c | 2008-03-25 18:36:25 -0300 | [diff] [blame] | 107 | flush_write_buffers(); |
| 108 | } |
| 109 | |
Glauber Costa | 9231b26 | 2008-03-25 18:36:26 -0300 | [diff] [blame] | 110 | static inline void |
| 111 | dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 112 | size_t size, enum dma_data_direction dir) |
Glauber Costa | 9231b26 | 2008-03-25 18:36:26 -0300 | [diff] [blame] | 113 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 114 | struct dma_map_ops *ops = get_dma_ops(hwdev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 115 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 116 | BUG_ON(!valid_dma_direction(dir)); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 117 | if (ops->sync_single_for_device) |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 118 | ops->sync_single_for_device(hwdev, dma_handle, size, dir); |
Glauber Costa | 9231b26 | 2008-03-25 18:36:26 -0300 | [diff] [blame] | 119 | flush_write_buffers(); |
| 120 | } |
| 121 | |
Glauber Costa | 627610f | 2008-03-25 18:36:27 -0300 | [diff] [blame] | 122 | static inline void |
| 123 | dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 124 | unsigned long offset, size_t size, |
| 125 | enum dma_data_direction dir) |
Glauber Costa | 627610f | 2008-03-25 18:36:27 -0300 | [diff] [blame] | 126 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 127 | struct dma_map_ops *ops = get_dma_ops(hwdev); |
Glauber Costa | 627610f | 2008-03-25 18:36:27 -0300 | [diff] [blame] | 128 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 129 | BUG_ON(!valid_dma_direction(dir)); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 130 | if (ops->sync_single_range_for_cpu) |
| 131 | ops->sync_single_range_for_cpu(hwdev, dma_handle, offset, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 132 | size, dir); |
Glauber Costa | 627610f | 2008-03-25 18:36:27 -0300 | [diff] [blame] | 133 | flush_write_buffers(); |
| 134 | } |
Glauber Costa | 7136233 | 2008-03-25 18:36:28 -0300 | [diff] [blame] | 135 | |
| 136 | static inline void |
| 137 | dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle, |
| 138 | unsigned long offset, size_t size, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 139 | enum dma_data_direction dir) |
Glauber Costa | 7136233 | 2008-03-25 18:36:28 -0300 | [diff] [blame] | 140 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 141 | struct dma_map_ops *ops = get_dma_ops(hwdev); |
Glauber Costa | 7136233 | 2008-03-25 18:36:28 -0300 | [diff] [blame] | 142 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 143 | BUG_ON(!valid_dma_direction(dir)); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 144 | if (ops->sync_single_range_for_device) |
| 145 | ops->sync_single_range_for_device(hwdev, dma_handle, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 146 | offset, size, dir); |
Glauber Costa | 7136233 | 2008-03-25 18:36:28 -0300 | [diff] [blame] | 147 | flush_write_buffers(); |
| 148 | } |
| 149 | |
Glauber Costa | ed435de | 2008-03-25 18:36:29 -0300 | [diff] [blame] | 150 | static inline void |
| 151 | dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 152 | int nelems, enum dma_data_direction dir) |
Glauber Costa | ed435de | 2008-03-25 18:36:29 -0300 | [diff] [blame] | 153 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 154 | struct dma_map_ops *ops = get_dma_ops(hwdev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 155 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 156 | BUG_ON(!valid_dma_direction(dir)); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 157 | if (ops->sync_sg_for_cpu) |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 158 | ops->sync_sg_for_cpu(hwdev, sg, nelems, dir); |
Glauber Costa | ed435de | 2008-03-25 18:36:29 -0300 | [diff] [blame] | 159 | flush_write_buffers(); |
| 160 | } |
Glauber Costa | e7f3a91 | 2008-03-25 18:36:30 -0300 | [diff] [blame] | 161 | |
| 162 | static inline void |
| 163 | dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 164 | int nelems, enum dma_data_direction dir) |
Glauber Costa | e7f3a91 | 2008-03-25 18:36:30 -0300 | [diff] [blame] | 165 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 166 | struct dma_map_ops *ops = get_dma_ops(hwdev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 167 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 168 | BUG_ON(!valid_dma_direction(dir)); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 169 | if (ops->sync_sg_for_device) |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 170 | ops->sync_sg_for_device(hwdev, sg, nelems, dir); |
Glauber Costa | e7f3a91 | 2008-03-25 18:36:30 -0300 | [diff] [blame] | 171 | |
| 172 | flush_write_buffers(); |
| 173 | } |
Glauber Costa | 4d92fbf | 2008-03-25 18:36:32 -0300 | [diff] [blame] | 174 | |
| 175 | static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, |
| 176 | size_t offset, size_t size, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 177 | enum dma_data_direction dir) |
Glauber Costa | 4d92fbf | 2008-03-25 18:36:32 -0300 | [diff] [blame] | 178 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 179 | struct dma_map_ops *ops = get_dma_ops(dev); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 180 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 181 | BUG_ON(!valid_dma_direction(dir)); |
| 182 | return ops->map_page(dev, page, offset, size, dir, NULL); |
Glauber Costa | 4d92fbf | 2008-03-25 18:36:32 -0300 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | static inline void dma_unmap_page(struct device *dev, dma_addr_t addr, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 186 | size_t size, enum dma_data_direction dir) |
Glauber Costa | 4d92fbf | 2008-03-25 18:36:32 -0300 | [diff] [blame] | 187 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 188 | dma_unmap_single(dev, addr, size, dir); |
Glauber Costa | 4d92fbf | 2008-03-25 18:36:32 -0300 | [diff] [blame] | 189 | } |
| 190 | |
Glauber Costa | 3cb6a91 | 2008-03-25 18:36:33 -0300 | [diff] [blame] | 191 | static inline void |
| 192 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
| 193 | enum dma_data_direction dir) |
| 194 | { |
| 195 | flush_write_buffers(); |
| 196 | } |
Glauber Costa | ae17a63b | 2008-03-25 18:36:38 -0300 | [diff] [blame] | 197 | |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 198 | static inline int dma_get_cache_alignment(void) |
| 199 | { |
| 200 | /* no easy way to get cache size on all x86, so return the |
| 201 | * maximum possible, to be safe */ |
| 202 | return boot_cpu_data.x86_clflush_size; |
| 203 | } |
| 204 | |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 205 | static inline unsigned long dma_alloc_coherent_mask(struct device *dev, |
| 206 | gfp_t gfp) |
| 207 | { |
| 208 | unsigned long dma_mask = 0; |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 209 | |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 210 | dma_mask = dev->coherent_dma_mask; |
| 211 | if (!dma_mask) |
| 212 | dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK; |
| 213 | |
| 214 | return dma_mask; |
| 215 | } |
| 216 | |
| 217 | static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp) |
| 218 | { |
| 219 | unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp); |
| 220 | |
FUJITA Tomonori | 75bebb7 | 2008-10-23 20:46:55 +0900 | [diff] [blame] | 221 | if (dma_mask <= DMA_24BIT_MASK) |
| 222 | gfp |= GFP_DMA; |
| 223 | #ifdef CONFIG_X86_64 |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 224 | if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA)) |
| 225 | gfp |= GFP_DMA32; |
| 226 | #endif |
| 227 | return gfp; |
| 228 | } |
| 229 | |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 230 | static inline void * |
| 231 | dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, |
| 232 | gfp_t gfp) |
| 233 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 234 | struct dma_map_ops *ops = get_dma_ops(dev); |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 235 | void *memory; |
Glauber Costa | ae17a63b | 2008-03-25 18:36:38 -0300 | [diff] [blame] | 236 | |
FUJITA Tomonori | 8a53ad6 | 2008-09-08 18:10:12 +0900 | [diff] [blame] | 237 | gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); |
| 238 | |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 239 | if (dma_alloc_from_coherent(dev, size, dma_handle, &memory)) |
| 240 | return memory; |
| 241 | |
| 242 | if (!dev) { |
| 243 | dev = &x86_dma_fallback_dev; |
| 244 | gfp |= GFP_DMA; |
| 245 | } |
| 246 | |
FUJITA Tomonori | 9821626 | 2008-09-10 00:49:48 +0900 | [diff] [blame] | 247 | if (!is_device_dma_capable(dev)) |
FUJITA Tomonori | de9f521 | 2008-09-08 18:10:11 +0900 | [diff] [blame] | 248 | return NULL; |
| 249 | |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 250 | if (!ops->alloc_coherent) |
| 251 | return NULL; |
| 252 | |
| 253 | return ops->alloc_coherent(dev, size, dma_handle, |
| 254 | dma_alloc_coherent_gfp_flags(dev, gfp)); |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | static inline void dma_free_coherent(struct device *dev, size_t size, |
| 258 | void *vaddr, dma_addr_t bus) |
| 259 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 260 | struct dma_map_ops *ops = get_dma_ops(dev); |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 261 | |
| 262 | WARN_ON(irqs_disabled()); /* for portability */ |
| 263 | |
| 264 | if (dma_release_from_coherent(dev, get_order(size), vaddr)) |
| 265 | return; |
| 266 | |
| 267 | if (ops->free_coherent) |
| 268 | ops->free_coherent(dev, size, vaddr, bus); |
| 269 | } |
| 270 | |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 271 | #endif |