Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754732AbbGFKUZ (ORCPT ); Mon, 6 Jul 2015 06:20:25 -0400 Received: from down.free-electrons.com ([37.187.137.238]:39163 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754220AbbGFKUH (ORCPT ); Mon, 6 Jul 2015 06:20:07 -0400 From: Maxime Ripard To: Vinod Koul , Nicolas Ferre , Alexandre Belloni Cc: Ludovic Desroches , Thomas Petazzoni , Boris Brezillon , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Maxime Ripard Subject: [PATCH 0/2] dmaengine: Add scatter-gathered memset support Date: Mon, 6 Jul 2015 12:19:22 +0200 Message-Id: <1436177964-19380-1-git-send-email-maxime.ripard@free-electrons.com> X-Mailer: git-send-email 2.4.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 921 Lines: 29 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/