From patchwork Fri Sep 16 10:53:15 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 9335437 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 11AB66077F for ; Fri, 16 Sep 2016 10:55:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0002529EEA for ; Fri, 16 Sep 2016 10:55:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E537429F26; Fri, 16 Sep 2016 10:55:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6F5F929EEA for ; Fri, 16 Sep 2016 10:55:38 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bkqmU-0002BA-Lr; Fri, 16 Sep 2016 10:54:06 +0000 Received: from arroyo.ext.ti.com ([198.47.19.12]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bkqmJ-00022r-SO for linux-arm-kernel@lists.infradead.org; Fri, 16 Sep 2016 10:53:57 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id u8GArL2t011229; Fri, 16 Sep 2016 05:53:21 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id u8GArKSI031712; Fri, 16 Sep 2016 05:53:20 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.294.0; Fri, 16 Sep 2016 05:53:20 -0500 Received: from dlep32.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id u8GArHYp001930; Fri, 16 Sep 2016 05:53:17 -0500 From: Peter Ujfalusi To: , Subject: [PATCH] dmaengine: omap-dma: Enable burst and data pack for SG Date: Fri, 16 Sep 2016 13:53:15 +0300 Message-ID: <20160916105315.28320-1-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.10.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160916_035356_198103_FD8D8BA7 X-CRM114-Status: UNSURE ( 7.85 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tony@atomide.com, linux-kernel@vger.kernel.org, linux@armlinux.org.uk, dmaengine@vger.kernel.org, misael.lopez@ti.com, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Misael Lopez Cruz Enable the burst and data pack modes for the scatter-gather in order to improve the throughput of the data transfers. The improvement has been verified with MMC HS200 mode in the DRA72 EVM using the iozone tool to compare the read throughput (in kB/s) with and without burst/pack for different reclens (in kB). With reclen Baseline sDMA burst/pack ------ -------- --------------- 64 46568 50820 128 57564 63413 256 65634 74937 512 72427 83483 1024 74563 84504 2048 76265 86079 4096 78045 87335 8192 78989 88154 16384 81265 91034 Signed-off-by: Misael Lopez Cruz Signed-off-by: Peter Ujfalusi --- drivers/dma/omap-dma.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 1b7f5f32bf74..7ca27d4b1c54 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -904,13 +904,16 @@ static struct dma_async_tx_descriptor *omap_dma_prep_slave_sg( d->es = es; d->ccr = c->ccr | CCR_SYNC_FRAME; - if (dir == DMA_DEV_TO_MEM) + if (dir == DMA_DEV_TO_MEM) { d->ccr |= CCR_DST_AMODE_POSTINC | CCR_SRC_AMODE_CONSTANT; - else + d->csdp = CSDP_DST_BURST_64 | CSDP_DST_PACKED; + } else { d->ccr |= CCR_DST_AMODE_CONSTANT | CCR_SRC_AMODE_POSTINC; + d->csdp = CSDP_SRC_BURST_64 | CSDP_SRC_PACKED; + } d->cicr = CICR_DROP_IE | CICR_BLOCK_IE; - d->csdp = es; + d->csdp |= es; if (dma_omap1()) { d->cicr |= CICR_TOUT_IE;