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> |
Marek Szyprowski | 0a2b9a6 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 15 | #include <linux/dma-contiguous.h> |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 16 | |
Jan Beulich | eb64713 | 2009-11-08 12:12:14 +0100 | [diff] [blame] | 17 | #ifdef CONFIG_ISA |
| 18 | # define ISA_DMA_BIT_MASK DMA_BIT_MASK(24) |
| 19 | #else |
| 20 | # define ISA_DMA_BIT_MASK DMA_BIT_MASK(32) |
| 21 | #endif |
| 22 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 23 | #define DMA_ERROR_CODE 0 |
| 24 | |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 25 | extern int iommu_merge; |
Joerg Roedel | 6c505ce | 2008-08-19 16:32:45 +0200 | [diff] [blame] | 26 | extern struct device x86_dma_fallback_dev; |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 27 | extern int panic_on_overflow; |
Glauber Costa | 7c18341 | 2008-03-25 18:36:36 -0300 | [diff] [blame] | 28 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 29 | extern struct dma_map_ops *dma_ops; |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 30 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 31 | static inline struct dma_map_ops *get_dma_ops(struct device *dev) |
Glauber Costa | c786df0 | 2008-03-25 18:36:37 -0300 | [diff] [blame] | 32 | { |
Alessandro Rubini | 4692d77 | 2012-04-04 19:39:58 +0200 | [diff] [blame] | 33 | #ifndef CONFIG_X86_DEV_DMA_OPS |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 34 | return dma_ops; |
| 35 | #else |
| 36 | if (unlikely(!dev) || !dev->archdata.dma_ops) |
| 37 | return dma_ops; |
| 38 | else |
| 39 | return dev->archdata.dma_ops; |
Jeremy Fitzhardinge | cfb80c9 | 2008-12-16 12:17:36 -0800 | [diff] [blame] | 40 | #endif |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 41 | } |
| 42 | |
Christoph Hellwig | 6894258 | 2015-09-09 15:39:39 -0700 | [diff] [blame] | 43 | bool arch_dma_alloc_attrs(struct device **dev, gfp_t *gfp); |
| 44 | #define arch_dma_alloc_attrs arch_dma_alloc_attrs |
| 45 | |
Christoph Hellwig | ee19637 | 2015-09-09 15:39:49 -0700 | [diff] [blame] | 46 | #define HAVE_ARCH_DMA_SUPPORTED 1 |
| 47 | extern int dma_supported(struct device *hwdev, u64 mask); |
| 48 | |
FUJITA Tomonori | 9f6ac57 | 2008-09-24 20:48:35 +0900 | [diff] [blame] | 49 | extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, |
Andrzej Pietrasiewicz | baa676f | 2012-03-27 14:28:18 +0200 | [diff] [blame] | 50 | dma_addr_t *dma_addr, gfp_t flag, |
| 51 | struct dma_attrs *attrs); |
FUJITA Tomonori | 9f6ac57 | 2008-09-24 20:48:35 +0900 | [diff] [blame] | 52 | |
Marek Szyprowski | 0a2b9a6 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 53 | extern void dma_generic_free_coherent(struct device *dev, size_t size, |
| 54 | void *vaddr, dma_addr_t dma_addr, |
| 55 | struct dma_attrs *attrs); |
| 56 | |
Alessandro Rubini | f7219a5 | 2012-04-04 19:40:10 +0200 | [diff] [blame] | 57 | #ifdef CONFIG_X86_DMA_REMAP /* Platform code defines bridge-specific code */ |
| 58 | extern bool dma_capable(struct device *dev, dma_addr_t addr, size_t size); |
| 59 | extern dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); |
| 60 | extern phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr); |
| 61 | #else |
| 62 | |
FUJITA Tomonori | 99becac | 2009-07-10 10:04:54 +0900 | [diff] [blame] | 63 | static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) |
| 64 | { |
| 65 | if (!dev->dma_mask) |
| 66 | return 0; |
| 67 | |
Jan Beulich | ac2b3e6 | 2009-12-15 16:47:43 -0800 | [diff] [blame] | 68 | return addr + size - 1 <= *dev->dma_mask; |
FUJITA Tomonori | 99becac | 2009-07-10 10:04:54 +0900 | [diff] [blame] | 69 | } |
| 70 | |
FUJITA Tomonori | 8d4f533 | 2009-07-10 10:05:01 +0900 | [diff] [blame] | 71 | static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) |
| 72 | { |
| 73 | return paddr; |
| 74 | } |
| 75 | |
| 76 | static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) |
| 77 | { |
| 78 | return daddr; |
| 79 | } |
Alessandro Rubini | f7219a5 | 2012-04-04 19:40:10 +0200 | [diff] [blame] | 80 | #endif /* CONFIG_X86_DMA_REMAP */ |
FUJITA Tomonori | 8d4f533 | 2009-07-10 10:05:01 +0900 | [diff] [blame] | 81 | |
Glauber Costa | 3cb6a91 | 2008-03-25 18:36:33 -0300 | [diff] [blame] | 82 | static inline void |
| 83 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
| 84 | enum dma_data_direction dir) |
| 85 | { |
| 86 | flush_write_buffers(); |
| 87 | } |
Glauber Costa | ae17a63b | 2008-03-25 18:36:38 -0300 | [diff] [blame] | 88 | |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 89 | static inline unsigned long dma_alloc_coherent_mask(struct device *dev, |
| 90 | gfp_t gfp) |
| 91 | { |
| 92 | unsigned long dma_mask = 0; |
Glauber Costa | b7107a3 | 2008-03-25 18:36:39 -0300 | [diff] [blame] | 93 | |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 94 | dma_mask = dev->coherent_dma_mask; |
| 95 | if (!dma_mask) |
Yang Hongyang | 2f4f27d | 2009-04-06 19:01:18 -0700 | [diff] [blame] | 96 | 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] | 97 | |
| 98 | return dma_mask; |
| 99 | } |
| 100 | |
| 101 | static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp) |
| 102 | { |
| 103 | unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp); |
| 104 | |
Yang Hongyang | 2f4f27d | 2009-04-06 19:01:18 -0700 | [diff] [blame] | 105 | if (dma_mask <= DMA_BIT_MASK(24)) |
FUJITA Tomonori | 75bebb7 | 2008-10-23 20:46:55 +0900 | [diff] [blame] | 106 | gfp |= GFP_DMA; |
| 107 | #ifdef CONFIG_X86_64 |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 108 | if (dma_mask <= DMA_BIT_MASK(32) && !(gfp & GFP_DMA)) |
FUJITA Tomonori | 823e7e8 | 2008-09-08 18:10:13 +0900 | [diff] [blame] | 109 | gfp |= GFP_DMA32; |
| 110 | #endif |
| 111 | return gfp; |
| 112 | } |
| 113 | |
Glauber Costa | 6f53663 | 2008-03-25 18:36:20 -0300 | [diff] [blame] | 114 | #endif |