linux-kernel - [PATCH 0/2] dmaengine: Add scatter-gathered memset support

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Message-Id: <1436177964-19380-1-git-send-email-maxime.ripard@free-electrons.com>
Date:	Mon,  6 Jul 2015 12:19:22 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Vinod Koul <vinod.koul@...el.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:	Ludovic Desroches <ludovic.desroches@...el.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: [PATCH 0/2] dmaengine: Add scatter-gathered memset support

Hi Vinod,

Here is a patch serie that adds a new dmaengine operation for
scatter-gathered memset.

Indeed, doing a memset over a discontiguous buffer is quite
inefficient at the moment, since you have to create and submit each
chunk separately, which might result in a huge list of transfers,
while some controllers can handle that just fine.

Let me know what you think,
Maxime

Maxime Ripard (2):
  dmaengine: Add scatter-gathered memset
  dmaengine: xdmac: Add scatter gathered memset support

 drivers/dma/at_xdmac.c    | 166 +++++++++++++++++++++++++++++++++++++++++++++-
 include/linux/dmaengine.h |   5 ++
 2 files changed, 170 insertions(+), 1 deletion(-)

-- 
2.4.5

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