Messages in this thread | | | From | Matt Porter <> | Subject | [PATCH v4 0/3] dmaengine: add slave sg transfer limits api | Date | Wed, 6 Mar 2013 14:56:04 -0500 |
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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.
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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