diff options
author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-03-10 18:23:32 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 18:52:42 -0500 |
commit | 2b4f767af73d50ab9ce3a92f254eb290f5e5507c (patch) | |
tree | 34d26b7e85cd2febe129c5f4a49ab03e3c39203d | |
parent | 027491f4b2ff15fe5cc36c900cb2d1fdb35cefdd (diff) |
dma-mapping: blackfin: remove the obsolete and unnecessary DMA API comments
pci_dma_sync_single was obsoleted long ago.
All the comments are generic, not architecture specific, simply describes
some of the DMA-API (and the same comments are in other files).
Documentation/DMA-API.txt have more detailed descriptions.
This removes the above obsolete and unnecessary DMA API comments. Let's
describe the DMA API in only Documentation/DMA-API.txt.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | arch/blackfin/include/asm/dma-mapping.h | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/arch/blackfin/include/asm/dma-mapping.h b/arch/blackfin/include/asm/dma-mapping.h index f9172ff30e5c..413a30314a6f 100644 --- a/arch/blackfin/include/asm/dma-mapping.h +++ b/arch/blackfin/include/asm/dma-mapping.h | |||
@@ -65,13 +65,6 @@ _dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir) | |||
65 | } | 65 | } |
66 | } | 66 | } |
67 | 67 | ||
68 | /* | ||
69 | * Map a single buffer of the indicated size for DMA in streaming mode. | ||
70 | * The 32-bit bus address to use is returned. | ||
71 | * | ||
72 | * Once the device is given the dma address, the device owns this memory | ||
73 | * until either pci_unmap_single or pci_dma_sync_single is performed. | ||
74 | */ | ||
75 | static inline dma_addr_t | 68 | static inline dma_addr_t |
76 | dma_map_single(struct device *dev, void *ptr, size_t size, | 69 | dma_map_single(struct device *dev, void *ptr, size_t size, |
77 | enum dma_data_direction dir) | 70 | enum dma_data_direction dir) |
@@ -88,14 +81,6 @@ dma_map_page(struct device *dev, struct page *page, | |||
88 | return dma_map_single(dev, page_address(page) + offset, size, dir); | 81 | return dma_map_single(dev, page_address(page) + offset, size, dir); |
89 | } | 82 | } |
90 | 83 | ||
91 | /* | ||
92 | * Unmap a single streaming mode DMA translation. The dma_addr and size | ||
93 | * must match what was provided for in a previous pci_map_single call. All | ||
94 | * other usages are undefined. | ||
95 | * | ||
96 | * After this call, reads by the cpu to the buffer are guarenteed to see | ||
97 | * whatever the device wrote there. | ||
98 | */ | ||
99 | static inline void | 84 | static inline void |
100 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, | 85 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, |
101 | enum dma_data_direction dir) | 86 | enum dma_data_direction dir) |
@@ -110,30 +95,9 @@ dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, | |||
110 | dma_unmap_single(dev, dma_addr, size, dir); | 95 | dma_unmap_single(dev, dma_addr, size, dir); |
111 | } | 96 | } |
112 | 97 | ||
113 | /* | ||
114 | * Map a set of buffers described by scatterlist in streaming | ||
115 | * mode for DMA. This is the scather-gather version of the | ||
116 | * above pci_map_single interface. Here the scatter gather list | ||
117 | * elements are each tagged with the appropriate dma address | ||
118 | * and length. They are obtained via sg_dma_{address,length}(SG). | ||
119 | * | ||
120 | * NOTE: An implementation may be able to use a smaller number of | ||
121 | * DMA address/length pairs than there are SG table elements. | ||
122 | * (for example via virtual mapping capabilities) | ||
123 | * The routine returns the number of addr/length pairs actually | ||
124 | * used, at most nents. | ||
125 | * | ||
126 | * Device ownership issues as mentioned above for pci_map_single are | ||
127 | * the same here. | ||
128 | */ | ||
129 | extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, | 98 | extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, |
130 | enum dma_data_direction dir); | 99 | enum dma_data_direction dir); |
131 | 100 | ||
132 | /* | ||
133 | * Unmap a set of streaming mode DMA translations. | ||
134 | * Again, cpu read rules concerning calls here are the same as for | ||
135 | * pci_unmap_single() above. | ||
136 | */ | ||
137 | static inline void | 101 | static inline void |
138 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, | 102 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, |
139 | int nhwentries, enum dma_data_direction dir) | 103 | int nhwentries, enum dma_data_direction dir) |