iommu/omap-iovmm: support non page-aligned buffers in iommu_vmap

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omap_iovmm requires page-aligned buffers, and that sometimes causes
omap3isp failures (i.e. whenever the buffer passed from userspace is not
page-aligned).

Remove this limitation by rounding the address of the first page entry
down, and adding the offset back to the device address.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
[ohad@wizery.com: rebased, but tested only with aligned buffers]
[ohad@wizery.com: slightly edited the commit log]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

...

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Laurent Pinchart 2011-09-02 13:32:30 -04:00 • committed by Joerg Roedel

parent 024ae884a6

commit 329d8d3b47

1 changed files with 26 additions and 10 deletions

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drivers/iommu/omap-iovmm.c

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