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SubjectRe: [PATCH v4 0/3] dmaengine: add slave sg transfer limits api
On Wed, Mar 06, 2013 at 02:56:04PM -0500, Matt Porter wrote:
> Changes since v3:
> - Change api name to dma_get_slave_sg_limits() to avoid
> confusion with h/w caps which are static.
>
> Changes since v2:
> - Change to a separate slave sg specific api. Drop the
> generic per-channel capabilities api that is not used.
>
> Changes since v1:
> - Use the existing dma_transaction_type enums instead of
> adding the mostly duplicated dmaengine_apis enums
>
> This series adds a new dmaengine api, dma_get_slave_sg_limits(), which
> may be used by a client driver to get slave SG transfer limits for a
> particular channel. At this time, these include the max number of
> segments and max length of a segment that a channel can handle for a
> SG transfer.
Looks fine, should be ready for merge once we fix the API.
Also I was under the impression that you will add another API to calculate the
limits, the stuff which you were doing in caps API earlier.

--
~Vinod
>
> Along with the API implementation, this series implements the backend
> device_slave_sg_limits() in the EDMA DMA Engine driver and converts the
> davinci_mmc driver to use dma_get_slave_sg_limits() to replace hardcoded
> limits.
>
> This is tested on the AM1808-EVM.
>
> Matt Porter (3):
> dmaengine: add dma_get_slave_sg_limits()
> dma: edma: add device_slave_sg_limits() support
> mmc: davinci: get SG segment limits with dma_get_slave_sg_limits()
>
> drivers/dma/edma.c | 17 +++++++++++++
> drivers/mmc/host/davinci_mmc.c | 37 ++++++++-------------------
> include/linux/dmaengine.h | 39 +++++++++++++++++++++++++++++
> include/linux/platform_data/mmc-davinci.h | 3 ---
> 4 files changed, 66 insertions(+), 30 deletions(-)
>
> --
> 1.7.9.5
>


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