Hi Arnd,
On Tuesday, April 10, 2012 2:24 PM Arnd Bergmann wrote:
On Tuesday 10 April 2012, Marek Szyprowski wrote:
This patch removes dma bounce hooks from the common dma mapping
implementation on ARM architecture and creates a separate set of
dma_map_ops for dma bounce devices.
Signed-off-by: Marek Szyprowski m.szyprow...@samsung.com
Acked-by: Kyungmin Park kyungmin.p...@samsung.com
I could be misunderstanding something, but it looks like this
one should come before patch 6, where you remove
some of the dmabounce functions. Can you clarify?
Before patch no 6, there were custom methods for all scatter/gather
related operations. They iterated over the whole scatter list and called
cache related operations directly (which in turn checked if we use dma
bounce code or not and called respective version). Patch no 6 changed
them not to use such shortcut for direct calling cache related operations.
Instead it provides similar loop over scatter list and calls methods
from the current device's dma_map_ops structure. This way, after patch no
7 these functions call simple dma_map_page() method for all standard
devices and dma bounce aware version for devices registered for dma
bouncing (with use different dma_map_ops).
I can provide a separate set of scatter/gather list related functions for
the linear dma mapping implementation and dma bouncing implementation
if you think that the current approach is too complicated or
over-engineered.
Best regards
--
Marek Szyprowski
Samsung Poland RD Center
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