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| author | Tomasz Figa <tfiga@chromium.org> | 2016-02-01 22:34:42 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2016-02-11 16:33:38 +0100 |
| commit | ccc66e738252cede5c13e8d529b93b5a35b307c2 (patch) | |
| tree | 9edac37e6cd7c014632076427dc2da92eee787b4 /include/media | |
| parent | ARM: 8507/1: dma-mapping: Use DMA_ATTR_ALLOC_SINGLE_PAGES hint to optimize alloc (diff) | |
| download | linux-ccc66e738252cede5c13e8d529b93b5a35b307c2.tar.xz linux-ccc66e738252cede5c13e8d529b93b5a35b307c2.zip | |
ARM: 8508/2: videobuf2-dc: Let drivers specify DMA attrs
DMA allocations might be subject to certain requirements specific to the
hardware using the buffers, such as availability of kernel mapping (for
contents fix-ups in the driver). The only entity that knows them is the
driver, so it must share this knowledge with vb2-dc.
This patch extends the alloc_ctx initialization interface to let the
driver specify DMA attrs, which are then stored inside the allocation
context and will be used for all allocations with that context.
As a side effect, all dma_*_coherent() calls are turned into
dma_*_attrs() calls, because the attributes need to be carried over
through all DMA operations.
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/videobuf2-dma-contig.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/media/videobuf2-dma-contig.h b/include/media/videobuf2-dma-contig.h index c33dfa69d7ab..2087c9a68be3 100644 --- a/include/media/videobuf2-dma-contig.h +++ b/include/media/videobuf2-dma-contig.h @@ -16,6 +16,8 @@ #include <media/videobuf2-v4l2.h> #include <linux/dma-mapping.h> +struct dma_attrs; + static inline dma_addr_t vb2_dma_contig_plane_dma_addr(struct vb2_buffer *vb, unsigned int plane_no) { @@ -24,7 +26,14 @@ vb2_dma_contig_plane_dma_addr(struct vb2_buffer *vb, unsigned int plane_no) return *addr; } -void *vb2_dma_contig_init_ctx(struct device *dev); +void *vb2_dma_contig_init_ctx_attrs(struct device *dev, + struct dma_attrs *attrs); + +static inline void *vb2_dma_contig_init_ctx(struct device *dev) +{ + return vb2_dma_contig_init_ctx_attrs(dev, NULL); +} + void vb2_dma_contig_cleanup_ctx(void *alloc_ctx); extern const struct vb2_mem_ops vb2_dma_contig_memops; |