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 | /* |
Paul Bolle | 395cf96 | 2011-08-15 02:02:26 +0200 | [diff] [blame] | 5 | * IOMMU interface. See Documentation/DMA-API-HOWTO.txt and |
Randy Dunlap | 5872fb9 | 2009-01-29 16:28:02 -0800 | [diff] [blame] | 6 | * Documentation/DMA-API.txt for documentation. |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 7 | */ |
| 8 | |
Vegard Nossum | d700285 | 2008-07-20 10:44:54 +0200 | [diff] [blame] | 9 | #include <linux/kmemcheck.h> |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 10 | #include <linux/scatterlist.h> |
Joerg Roedel | 2118d0c | 2009-01-09 15:13:15 +0100 | [diff] [blame] | 11 | #include <linux/dma-debug.h> |
FUJITA Tomonori | abe6602 | 2009-01-05 23:47:21 +0900 | [diff] [blame] | 12 | #include <linux/dma-attrs.h> |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 13 | #include <asm/io.h> |
| 14 | #include <asm/swiotlb.h> |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 15 | #include <asm-generic/dma-coherent.h> |
Marek Szyprowski | 0a2b9a6 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 16 | #include <linux/dma-contiguous.h> |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 17 | |
Jan Beulich | eb64713 | 2009-11-08 12:12:14 +0100 | [diff] [blame] | 18 | #ifdef CONFIG_ISA |
| 19 | # define ISA_DMA_BIT_MASK DMA_BIT_MASK(24) |
| 20 | #else |
| 21 | # define ISA_DMA_BIT_MASK DMA_BIT_MASK(32) |
| 22 | #endif |
| 23 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 24 | #define DMA_ERROR_CODE 0 |
| 25 | |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 26 | extern int iommu_merge; |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 27 | extern struct device x86_dma_fallback_dev; |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 28 | extern int panic_on_overflow; |
Glauber Costa | 7c18341 | 2008-03-25 18:36:36 -0300 | [diff] [blame] | 29 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 30 | extern struct dma_map_ops *dma_ops; |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 31 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 32 | static inline struct dma_map_ops *get_dma_ops(struct device *dev) |
Glauber Costa | c786df0 | 2008-03-25 18:36:37 -0300 | [diff] [blame] | 33 | { |
Alessandro Rubini | 4692d77 | 2012-04-04 19:39:58 +0200 | [diff] [blame] | 34 | #ifndef CONFIG_X86_DEV_DMA_OPS |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 35 | return dma_ops; |
| 36 | #else |
| 37 | if (unlikely(!dev) || !dev->archdata.dma_ops) |
| 38 | return dma_ops; |
| 39 | else |
| 40 | return dev->archdata.dma_ops; |
Jeremy Fitzhardinge | cfb80c9 | 2008-12-16 12:17:36 -0800 | [diff] [blame] | 41 | #endif |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 42 | } |
| 43 | |
FUJITA Tomonori | 7c095e4 | 2009-06-17 16:28:12 -0700 | [diff] [blame] | 44 | #include <asm-generic/dma-mapping-common.h> |
| 45 | |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 46 | /* Make sure we keep the same behaviour */ |
| 47 | static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
| 48 | { |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 49 | struct dma_map_ops *ops = get_dma_ops(dev); |
Shuah Khan | 6c9c6d6 | 2012-10-08 11:08:06 -0600 | [diff] [blame] | 50 | debug_dma_mapping_error(dev, dma_addr); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 51 | if (ops->mapping_error) |
| 52 | return ops->mapping_error(dev, dma_addr); |
Glauber Costa | c786df0 | 2008-03-25 18:36:37 -0300 | [diff] [blame] | 53 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 54 | return (dma_addr == DMA_ERROR_CODE); |
Glauber Costa | c786df0 | 2008-03-25 18:36:37 -0300 | [diff] [blame] | 55 | } |
| 56 | |
Glauber Costa | 8d396de | 2008-03-25 18:36:31 -0300 | [diff] [blame] | 57 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
| 58 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
Glauber Costa | 8d396de | 2008-03-25 18:36:31 -0300 | [diff] [blame] | 59 | |
Glauber Costa | 802c1f6 | 2008-03-25 18:36:34 -0300 | [diff] [blame] | 60 | extern int dma_supported(struct device *hwdev, u64 mask); |
| 61 | extern int dma_set_mask(struct device *dev, u64 mask); |
| 62 | |
FUJITA Tomonori | 9f6ac57 | 2008-09-24 20:48:35 +0900 | [diff] [blame] | 63 | extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, |
Andrzej Pietrasiewicz | baa676f | 2012-03-27 14:28:18 +0200 | [diff] [blame] | 64 | dma_addr_t *dma_addr, gfp_t flag, |
| 65 | struct dma_attrs *attrs); |
FUJITA Tomonori | 9f6ac57 | 2008-09-24 20:48:35 +0900 | [diff] [blame] | 66 | |
Marek Szyprowski | 0a2b9a6 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 67 | extern void dma_generic_free_coherent(struct device *dev, size_t size, |
| 68 | void *vaddr, dma_addr_t dma_addr, |
| 69 | struct dma_attrs *attrs); |
| 70 | |
Alessandro Rubini | f7219a5 | 2012-04-04 19:40:10 +0200 | [diff] [blame] | 71 | #ifdef CONFIG_X86_DMA_REMAP /* Platform code defines bridge-specific code */ |
| 72 | extern bool dma_capable(struct device *dev, dma_addr_t addr, size_t size); |
| 73 | extern dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); |
| 74 | extern phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr); |
| 75 | #else |
| 76 | |
FUJITA Tomonori | 99becac | 2009-07-10 10:04:54 +0900 | [diff] [blame] | 77 | static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) |
| 78 | { |
| 79 | if (!dev->dma_mask) |
| 80 | return 0; |
| 81 | |
Jan Beulich | ac2b3e6 | 2009-12-15 16:47:43 -0800 | [diff] [blame] | 82 | return addr + size - 1 <= *dev->dma_mask; |
FUJITA Tomonori | 99becac | 2009-07-10 10:04:54 +0900 | [diff] [blame] | 83 | } |
| 84 | |
FUJITA Tomonori | 8d4f533 | 2009-07-10 10:05:01 +0900 | [diff] [blame] | 85 | static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) |
| 86 | { |
| 87 | return paddr; |
| 88 | } |
| 89 | |
| 90 | static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) |
| 91 | { |
| 92 | return daddr; |
| 93 | } |
Alessandro Rubini | f7219a5 | 2012-04-04 19:40:10 +0200 | [diff] [blame] | 94 | #endif /* CONFIG_X86_DMA_REMAP */ |
FUJITA Tomonori | 8d4f533 | 2009-07-10 10:05:01 +0900 | [diff] [blame] | 95 | |
Glauber Costa | 3cb6a91 | 2008-03-25 18:36:33 -0300 | [diff] [blame] | 96 | static inline void |
| 97 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
| 98 | enum dma_data_direction dir) |
| 99 | { |
| 100 | flush_write_buffers(); |
| 101 | } |
Glauber Costa | ae17a63b | 2008-03-25 18:36:38 -0300 | [diff] [blame] | 102 | |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 103 | static inline unsigned long dma_alloc_coherent_mask(struct device *dev, |
| 104 | gfp_t gfp) |
| 105 | { |
| 106 | unsigned long dma_mask = 0; |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 107 | |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 108 | dma_mask = dev->coherent_dma_mask; |
| 109 | if (!dma_mask) |
Yang Hongyang | 2f4f27d | 2009-04-06 19:01:18 -0700 | [diff] [blame] | 110 | dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32); |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 111 | |
| 112 | return dma_mask; |
| 113 | } |
| 114 | |
| 115 | static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp) |
| 116 | { |
| 117 | unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp); |
| 118 | |
Yang Hongyang | 2f4f27d | 2009-04-06 19:01:18 -0700 | [diff] [blame] | 119 | if (dma_mask <= DMA_BIT_MASK(24)) |
FUJITA Tomonori | 75bebb7 | 2008-10-23 20:46:55 +0900 | [diff] [blame] | 120 | gfp |= GFP_DMA; |
| 121 | #ifdef CONFIG_X86_64 |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 122 | if (dma_mask <= DMA_BIT_MASK(32) && !(gfp & GFP_DMA)) |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 123 | gfp |= GFP_DMA32; |
| 124 | #endif |
| 125 | return gfp; |
| 126 | } |
| 127 | |
Andrzej Pietrasiewicz | baa676f | 2012-03-27 14:28:18 +0200 | [diff] [blame] | 128 | #define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) |
| 129 | |
Denys Vlasenko | 0c7965f | 2015-04-13 13:54:32 +0200 | [diff] [blame] | 130 | void * |
Andrzej Pietrasiewicz | baa676f | 2012-03-27 14:28:18 +0200 | [diff] [blame] | 131 | dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle, |
Denys Vlasenko | 0c7965f | 2015-04-13 13:54:32 +0200 | [diff] [blame] | 132 | gfp_t gfp, struct dma_attrs *attrs); |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 133 | |
Andrzej Pietrasiewicz | baa676f | 2012-03-27 14:28:18 +0200 | [diff] [blame] | 134 | #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL) |
| 135 | |
Denys Vlasenko | f1dc154 | 2015-04-13 13:54:33 +0200 | [diff] [blame] | 136 | void dma_free_attrs(struct device *dev, size_t size, |
| 137 | void *vaddr, dma_addr_t bus, |
| 138 | struct dma_attrs *attrs); |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 139 | |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 140 | #endif |