ARM: dma-mapping: add support for DMA_ATTR_NO_KERNEL_MAPPING attribute

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This patch adds support for DMA_ATTR_NO_KERNEL_MAPPING attribute for
IOMMU allocations, what let drivers to save precious kernel virtual
address space for large buffers that are intended to be accessed only
from userspace.

This patch is heavily based on initial work kindly provided by Abhinav
Kochhar <abhinav.k@samsung.com>.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>

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Marek Szyprowski 2012-05-16 19:38:58 +01:00

parent d5724f172f

commit 955c757e09

1 changed files with 13 additions and 5 deletions

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18

arch/arm/mm/dma-mapping.c

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