lkml.org 
[lkml]   [2013]   [Mar]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v4 0/3] dmaengine: add slave sg transfer limits api
Date
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



\
 
 \ /
  Last update: 2013-03-06 21:41    [from the cache]
©2003-2011 Jasper Spaans