rapidio: add DMA engine support for RIO data transfers

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Adds DMA Engine framework support into RapidIO subsystem.

Uses DMA Engine DMA_SLAVE interface to generate data transfers to/from
remote RapidIO target devices.

Introduces RapidIO-specific wrapper for prep_slave_sg() interface with an
extra parameter to pass target specific information.

Uses scatterlist to describe local data buffer.  Address flat data buffer
on a remote side.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Cc: Li Yang <leoli@freescale.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

...

This commit is contained in:

Alexandre Bounine 2012-05-31 16:26:38 -07:00 • committed by Linus Torvalds

parent ce2d52cc13

commit e42d98ebe7

5 changed files with 163 additions and 0 deletions

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14

drivers/rapidio/Kconfig

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81

drivers/rapidio/rio.c

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12

include/linux/dmaengine.h

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47

include/linux/rio.h

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9

include/linux/rio_drv.h

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