{"id":812763,"url":"http://patchwork.ozlabs.org/api/1.2/patches/812763/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-imx/patch/20170912104424.18495-6-peter.ujfalusi@ti.com/","project":{"id":19,"url":"http://patchwork.ozlabs.org/api/1.2/projects/19/?format=json","name":"Linux IMX development","link_name":"linux-imx","list_id":"linux-imx-kernel.lists.patchwork.ozlabs.org","list_email":"linux-imx-kernel@lists.patchwork.ozlabs.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20170912104424.18495-6-peter.ujfalusi@ti.com>","list_archive_url":null,"date":"2017-09-12T10:44:24","name":"[5/5] dmaengine: omap-dma: Implement device_get_max_len callback","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"7f8db9021f17d746605c5da1595ec99f9ab43232","submitter":{"id":9142,"url":"http://patchwork.ozlabs.org/api/1.2/people/9142/?format=json","name":"Peter Ujfalusi","email":"peter.ujfalusi@ti.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-imx/patch/20170912104424.18495-6-peter.ujfalusi@ti.com/mbox/","series":[{"id":2660,"url":"http://patchwork.ozlabs.org/api/1.2/series/2660/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-imx/list/?series=2660","date":"2017-09-12T10:44:20","name":"dmaengine: core/edma/omap-dma: maximum SG len reporting","version":1,"mbox":"http://patchwork.ozlabs.org/series/2660/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/812763/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/812763/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming-imx@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming-imx@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.infradead.org\n\t(client-ip=65.50.211.133; helo=bombadil.infradead.org;\n\tenvelope-from=linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=lists.infradead.org\n\theader.i=@lists.infradead.org header.b=\"eUHCec0V\"; \n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ti.com header.i=@ti.com header.b=\"FV75i/1B\"; \n\tdkim-atps=neutral"],"Received":["from bombadil.infradead.org (bombadil.infradead.org\n\t[65.50.211.133])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xs1fq2k3gz9s7g\n\tfor ;\n\tTue, 12 Sep 2017 20:45:55 +1000 (AEST)","from localhost ([127.0.0.1] helo=bombadil.infradead.org)\n\tby bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux))\n\tid 1drihT-00026O-2p; Tue, 12 Sep 2017 10:45:51 +0000","from lelnx194.ext.ti.com ([198.47.27.80])\n\tby bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux))\n\tid 1driga-0000Lj-WB for linux-arm-kernel@lists.infradead.org;\n\tTue, 12 Sep 2017 10:44:58 +0000","from dflxv15.itg.ti.com ([128.247.5.124])\n\tby lelnx194.ext.ti.com (8.15.1/8.15.1) with ESMTP id v8CAicrq016610; \n\tTue, 12 Sep 2017 05:44:38 -0500","from DFLE112.ent.ti.com (dfle112.ent.ti.com [10.64.6.33])\n\tby dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id v8CAicRM032393;\n\tTue, 12 Sep 2017 05:44:38 -0500","from DFLE107.ent.ti.com (10.64.6.28) by DFLE112.ent.ti.com\n\t(10.64.6.33) with Microsoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.1.845.34;\n\tTue, 12 Sep 2017 05:44:38 -0500","from dlep32.itg.ti.com (157.170.170.100) by DFLE107.ent.ti.com\n\t(10.64.6.28) with Microsoft SMTP Server (version=TLS1_0,\n\tcipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.845.34 via Frontend\n\tTransport; Tue, 12 Sep 2017 05:44:38 -0500","from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153])\n\tby dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id v8CAiOu6007788; \n\tTue, 12 Sep 2017 05:44:36 -0500"],"DKIM-Signature":["v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=lists.infradead.org; s=bombadil.20170209; h=Sender:\n\tContent-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post:\n\tList-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:\n\tMessage-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description:\n\tResent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:\n\tList-Owner; bh=o4oubHwGGjcfJzCWR+rBLj0BNAu7Mt1zS8NYVg3hg/A=;\n\tb=eUHCec0VJl5zrx\n\toVO0f5dRF/BCtjscCjrpIkXq2iG9BY7ewUFJ4SXNcXXdOuWtIVanM4qib0DxL+DSd3y2P4Dr5Band\n\tuAzyYPeNqw2SCPDvbt8G/31IOD6+pPeigalYKHLGtwaJREl78FqTMoycZAaonuwVVpXotigzJRTP0\n\tVrFBIzgN09wp9dRghwtXidQzqn7Yo0Rf7uA9+Gbox5s1y3N3QXgO1/3JbCHXxs7mXLsavWgs3yaBs\n\tpfsuqjPnfed8/p0xClu7dVC0PCw4FJQ+lpvTMc9u1nUMT/6vmHSGOs1ESoyVWiZnahWM6llFcWCPU\n\tojkFvDZ9HUuZat0YLHTQ==;","v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com;\n\ts=ti-com-17Q1; t=1505213078;\n\tbh=MfXNTKdx2O+K5V99+SqHjd6ytn6Ax6gG65JH7CWntMU=;\n\th=From:To:CC:Subject:Date:In-Reply-To:References;\n\tb=FV75i/1BICHpPxIqiJFsLUEywaCbFLvPVqi8iXbTumJoMVo9J0Cm2tYocirtYNvqN\n\tIQtk8+WGcD5aiZ96bwMXLmyhZTuYlWxlrPPKSWuebHxQ9Tl7wAOfKXOafnRDxuD0Bd\n\taEFhN8qRkjpoMlnWqMshN5mTcqnXs6LpG+hn6u4Y="],"From":"Peter Ujfalusi ","To":", ","Subject":"[PATCH 5/5] dmaengine: omap-dma: Implement device_get_max_len\n\tcallback","Date":"Tue, 12 Sep 2017 13:44:24 +0300","Message-ID":"<20170912104424.18495-6-peter.ujfalusi@ti.com>","X-Mailer":"git-send-email 2.14.1","In-Reply-To":"<20170912104424.18495-1-peter.ujfalusi@ti.com>","References":"<20170912104424.18495-1-peter.ujfalusi@ti.com>","MIME-Version":"1.0","X-EXCLAIMER-MD-CONFIG":"e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20170912_034457_146956_1A45FE5C ","X-CRM114-Status":"UNSURE ( 8.00 )","X-CRM114-Notice":"Please train this message.","X-Spam-Score":"-2.0 (--)","X-Spam-Report":"SpamAssassin version 3.4.1 on bombadil.infradead.org summary:\n\tContent analysis details: (-2.0 points)\n\tpts rule name description\n\t---- ----------------------\n\t--------------------------------------------------\n\t-0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/,\n\tno trust [198.47.27.80 listed in list.dnswl.org]\n\t-0.0 SPF_PASS SPF: sender matches SPF record\n\t-0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay\n\tdomain\n\t-1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n\t[score: 0.0000]\n\t-0.1 DKIM_VALID Message has at least one valid DKIM or DK signature\n\t0.1 DKIM_SIGNED Message has a DKIM or DK signature,\n\tnot necessarily valid\n\t-0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from\n\tauthor's domain","X-BeenThere":"linux-arm-kernel@lists.infradead.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"dmaengine@vger.kernel.org, t-kristo@ti.com, linux-omap@vger.kernel.org, \n\tlinux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Sender":"\"linux-arm-kernel\" ","Errors-To":"linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org","List-Id":"linux-imx-kernel.lists.patchwork.ozlabs.org"},"content":"sDMA can support maximum of 65535 number of bursts in one transfer.\nThe limitation is because the CFN counter is 16bit unsigned.\n\nSigned-off-by: Peter Ujfalusi \n---\n drivers/dma/omap-dma.c | 23 +++++++++++++++++++++++\n 1 file changed, 23 insertions(+)","diff":"diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c\nindex f6dd849159d8..6418be98a782 100644\n--- a/drivers/dma/omap-dma.c\n+++ b/drivers/dma/omap-dma.c\n@@ -1297,6 +1297,28 @@ static int omap_dma_slave_config(struct dma_chan *chan, struct dma_slave_config\n \treturn 0;\n }\n \n+static u32 omap_dma_get_max_len(struct dma_chan *chan,\n+\t\t\t\tenum dma_transfer_direction dir)\n+{\n+\tstruct omap_chan *c = to_omap_dma_chan(chan);\n+\tenum dma_slave_buswidth dev_width;\n+\tu32 burst;\n+\n+\tif (!is_slave_direction(dir))\n+\t\treturn 0;\n+\n+\tif (dir == DMA_DEV_TO_MEM) {\n+\t\tdev_width = c->cfg.src_addr_width;\n+\t\tburst = c->cfg.src_maxburst;\n+\t} else {\n+\t\tburst = c->cfg.dst_maxburst;\n+\t\tdev_width = c->cfg.dst_addr_width;\n+\t}\n+\n+\t/* CFN: 16bit unsigned. Number of bursts */\n+\treturn dev_width * burst * (SZ_64K - 1);\n+}\n+\n static int omap_dma_terminate_all(struct dma_chan *chan)\n {\n \tstruct omap_chan *c = to_omap_dma_chan(chan);\n@@ -1478,6 +1500,7 @@ static int omap_dma_probe(struct platform_device *pdev)\n \tod->ddev.device_prep_dma_memcpy = omap_dma_prep_dma_memcpy;\n \tod->ddev.device_prep_interleaved_dma = omap_dma_prep_dma_interleaved;\n \tod->ddev.device_config = omap_dma_slave_config;\n+\tod->ddev.device_get_max_len = omap_dma_get_max_len;\n \tod->ddev.device_pause = omap_dma_pause;\n \tod->ddev.device_resume = omap_dma_resume;\n \tod->ddev.device_terminate_all = omap_dma_terminate_all;\n","prefixes":["5/5"]}