From: Vinod Koul <vkoul@infradead.org> To: Dan Williams <dan.j.williams@intel.com>, Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: vinod.koul@intel.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] dmaengine: add helper function for slave_single Date: Mon, 25 Jul 2011 21:07:15 +0530 [thread overview] Message-ID: <1311608235.8206.24.camel@vkoul-mobl4> (raw) >From af9afd16e9954edb45f0cf71834653133d75e79c Mon Sep 17 00:00:00 2001 From: Vinod Koul <vinod.koul@intel.com> Date: Mon, 25 Jul 2011 19:57:52 +0530 Subject: [PATCH] dmaengine: add helper function for slave_single For clients which require a single slave transfer and dont want to be bothered about the scatterlist api, this helper gives simple API for this transfer and creates single scatterlist for DMA API Idea from Russel King Signed-off-by: Vinod Koul <vinod.koul@intel.com> --- include/linux/dmaengine.h | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index eee7add..97dafc6 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -517,6 +517,16 @@ static inline int dmaengine_slave_config(struct dma_chan *chan, (unsigned long)config); } +static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single( + struct dma_chan *chan, void *buf, size_t len, + enum dma_data_direction dir, unsigned long flags) +{ + struct scatterlist sg; + sg_init_one(&sg, buf, len); + + return chan->device->device_prep_slave_sg(chan, &sg, 1, dir, flags); +} + static inline int dmaengine_terminate_all(struct dma_chan *chan) { return dmaengine_device_control(chan, DMA_TERMINATE_ALL, 0); -- 1.7.0.4 -- ~Vinod Koul Intel Corp.
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From: vkoul@infradead.org (Vinod Koul) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] dmaengine: add helper function for slave_single Date: Mon, 25 Jul 2011 21:07:15 +0530 [thread overview] Message-ID: <1311608235.8206.24.camel@vkoul-mobl4> (raw)
next reply other threads:[~2011-07-25 15:37 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-07-25 15:37 Vinod Koul [this message] 2011-07-25 15:37 ` [PATCH] dmaengine: add helper function for slave_single Vinod Koul 2011-07-25 15:47 ` Russell King - ARM Linux 2011-07-25 15:47 ` Russell King - ARM Linux 2011-08-04 4:27 ` Koul, Vinod 2011-08-04 4:27 ` Koul, Vinod -- strict thread matches above, loose matches on Subject: below -- 2011-07-25 14:27 Vinod Koul
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