diff options
author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-03-10 15:23:32 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:42 -0800 |
commit | 2b4f767af73d50ab9ce3a92f254eb290f5e5507c (patch) | |
tree | 34d26b7e85cd2febe129c5f4a49ab03e3c39203d /arch/blackfin | |
parent | 027491f4b2ff15fe5cc36c900cb2d1fdb35cefdd (diff) | |
download | linux-3.10-2b4f767af73d50ab9ce3a92f254eb290f5e5507c.tar.gz linux-3.10-2b4f767af73d50ab9ce3a92f254eb290f5e5507c.tar.bz2 linux-3.10-2b4f767af73d50ab9ce3a92f254eb290f5e5507c.zip |
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>
Diffstat (limited to 'arch/blackfin')
-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 f9172ff30e5..413a30314a6 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) } } -/* - * Map a single buffer of the indicated size for DMA in streaming mode. - * The 32-bit bus address to use is returned. - * - * Once the device is given the dma address, the device owns this memory - * until either pci_unmap_single or pci_dma_sync_single is performed. - */ static inline dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, enum dma_data_direction dir) @@ -88,14 +81,6 @@ dma_map_page(struct device *dev, struct page *page, return dma_map_single(dev, page_address(page) + offset, size, dir); } -/* - * Unmap a single streaming mode DMA translation. The dma_addr and size - * must match what was provided for in a previous pci_map_single call. All - * other usages are undefined. - * - * After this call, reads by the cpu to the buffer are guarenteed to see - * whatever the device wrote there. - */ static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, enum dma_data_direction dir) @@ -110,30 +95,9 @@ dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, dma_unmap_single(dev, dma_addr, size, dir); } -/* - * Map a set of buffers described by scatterlist in streaming - * mode for DMA. This is the scather-gather version of the - * above pci_map_single interface. Here the scatter gather list - * elements are each tagged with the appropriate dma address - * and length. They are obtained via sg_dma_{address,length}(SG). - * - * NOTE: An implementation may be able to use a smaller number of - * DMA address/length pairs than there are SG table elements. - * (for example via virtual mapping capabilities) - * The routine returns the number of addr/length pairs actually - * used, at most nents. - * - * Device ownership issues as mentioned above for pci_map_single are - * the same here. - */ extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir); -/* - * Unmap a set of streaming mode DMA translations. - * Again, cpu read rules concerning calls here are the same as for - * pci_unmap_single() above. - */ static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, enum dma_data_direction dir) |