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GET /api/patches/812765/?format=api
{ "id": 812765, "url": "http://patchwork.ozlabs.org/api/patches/812765/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-imx/patch/20170912104424.18495-5-peter.ujfalusi@ti.com/", "project": { "id": 19, "url": "http://patchwork.ozlabs.org/api/projects/19/?format=api", "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": "<20170912104424.18495-5-peter.ujfalusi@ti.com>", "list_archive_url": null, "date": "2017-09-12T10:44:23", "name": "[4/5] dmaengine: edma: Implement device_get_max_len callback", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "d38f630e3227663b6301dbd62a48ed8a370bb978", "submitter": { "id": 9142, "url": "http://patchwork.ozlabs.org/api/people/9142/?format=api", "name": "Peter Ujfalusi", "email": "peter.ujfalusi@ti.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-imx/patch/20170912104424.18495-5-peter.ujfalusi@ti.com/mbox/", "series": [ { "id": 2660, "url": "http://patchwork.ozlabs.org/api/series/2660/?format=api", "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/812765/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/812765/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org>", "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=<UNKNOWN>)", "ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=lists.infradead.org\n\theader.i=@lists.infradead.org header.b=\"KgSu28MV\"; \n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ti.com header.i=@ti.com header.b=\"hjOA7QXm\"; \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 3xs1gk5Kfqz9s7M\n\tfor <incoming-imx@patchwork.ozlabs.org>;\n\tTue, 12 Sep 2017 20:46:42 +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 1driiE-0002l1-VK; Tue, 12 Sep 2017 10:46:38 +0000", "from lelnx193.ext.ti.com ([198.47.27.77])\n\tby bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux))\n\tid 1drigc-0000LW-K3 for linux-arm-kernel@lists.infradead.org;\n\tTue, 12 Sep 2017 10:45:00 +0000", "from dflxv15.itg.ti.com ([128.247.5.124])\n\tby lelnx193.ext.ti.com (8.15.1/8.15.1) with ESMTP id v8CAiaGv018302; \n\tTue, 12 Sep 2017 05:44:36 -0500", "from DFLE114.ent.ti.com (dfle114.ent.ti.com [10.64.6.35])\n\tby dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id v8CAiaOT032364;\n\tTue, 12 Sep 2017 05:44:36 -0500", "from DFLE110.ent.ti.com (10.64.6.31) by DFLE114.ent.ti.com\n\t(10.64.6.35) 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 05:44:35 -0500", "from dlep32.itg.ti.com (157.170.170.100) by DFLE110.ent.ti.com\n\t(10.64.6.31) 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 05:44:35 -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 v8CAiOu5007788; \n\tTue, 12 Sep 2017 05:44:34 -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=Xd4TMiX+4h6SNMxKnOFaIIX/xdpIzqb9DkV/rMcTEek=;\n\tb=KgSu28MVbhCVVJ\n\tHsZ727aJZGI/6QcpBk0jd8U8jaWLrUCuh19FB5P4Fbb0iPwXejK+GVWkbnjGal83nZV5M3aCEGRYI\n\tcZte8zb9Yd/r/Tbund7o1EJKJgvH+tsDTF3jlv3qU3w/KAkl1/XyOliXMig6E5Klpx+luMen+aDAT\n\t9BtJ6z+U/a5bA9B8orxtKrActUW2u6+QYxXILuHpUevBTvYNaDNZL+19J2OEUPmsnk7ik3SoaCDnX\n\tFeB+9QSFseRD8RXiIYjJQ1eQyNU0q0JIOIVLX7+GHTvidwUwNRy9q6FO316noEuOUqSt6eo/nCLpD\n\txK3v8JajydBC+bxzmY/w==;", "v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com;\n\ts=ti-com-17Q1; t=1505213076;\n\tbh=d33L8/srOSJ5JMoAdteSs1oR1/iBm8YLFGRnXsFqoEc=;\n\th=From:To:CC:Subject:Date:In-Reply-To:References;\n\tb=hjOA7QXm6NxZn3IYbUVZoQOYyqWoPiar5UiszllMTX7zDKCwSainyrE8Vey7BoYeZ\n\t/0dFtHxD9lk3eV4n6vFDEOwiwNq10S59UTB6mOsLoCo4wosLemMlC4dbwSd+3PsSBk\n\tOhZbH4glImyXvqP6zSCiB3VXx0QFJNtEqTHwwHKo=" ], "From": "Peter Ujfalusi <peter.ujfalusi@ti.com>", "To": "<vinod.koul@intel.com>, <dan.j.williams@intel.com>", "Subject": "[PATCH 4/5] dmaengine: edma: Implement device_get_max_len callback", "Date": "Tue, 12 Sep 2017 13:44:23 +0300", "Message-ID": "<20170912104424.18495-5-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_034458_761841_92867899 ", "X-CRM114-Status": "UNSURE ( 8.25 )", "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 [198.47.27.77 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": "<http://lists.infradead.org/mailman/options/linux-arm-kernel>,\n\t<mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe>", "List-Archive": "<http://lists.infradead.org/pipermail/linux-arm-kernel/>", "List-Post": "<mailto:linux-arm-kernel@lists.infradead.org>", "List-Help": "<mailto:linux-arm-kernel-request@lists.infradead.org?subject=help>", "List-Subscribe": "<http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>,\n\t<mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe>", "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\" <linux-arm-kernel-bounces@lists.infradead.org>", "Errors-To": "linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org", "List-Id": "linux-imx-kernel.lists.patchwork.ozlabs.org" }, "content": "eDMA can support maximum of 65535 number of bursts in one transfer.\nThe limitation is because the CCNT counter is 16bit unsigned.\n\nSigned-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>\n---\n drivers/dma/edma.c | 23 +++++++++++++++++++++++\n 1 file changed, 23 insertions(+)", "diff": "diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c\nindex 6970355abdc9..14c52574262c 100644\n--- a/drivers/dma/edma.c\n+++ b/drivers/dma/edma.c\n@@ -900,6 +900,28 @@ static int edma_slave_config(struct dma_chan *chan,\n \treturn 0;\n }\n \n+static u32 edma_get_max_len(struct dma_chan *chan,\n+\t\t\t enum dma_transfer_direction dir)\n+{\n+\tstruct edma_chan *echan = to_edma_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 = echan->cfg.src_addr_width;\n+\t\tburst = echan->cfg.src_maxburst;\n+\t} else {\n+\t\tburst = echan->cfg.dst_maxburst;\n+\t\tdev_width = echan->cfg.dst_addr_width;\n+\t}\n+\n+\t/* CCNT: 16bit unsigned. Number of bursts */\n+\treturn dev_width * burst * (SZ_64K - 1);\n+}\n+\n static int edma_dma_pause(struct dma_chan *chan)\n {\n \tstruct edma_chan *echan = to_edma_chan(chan);\n@@ -1850,6 +1872,7 @@ static void edma_dma_init(struct edma_cc *ecc, bool legacy_mode)\n \ts_ddev->device_issue_pending = edma_issue_pending;\n \ts_ddev->device_tx_status = edma_tx_status;\n \ts_ddev->device_config = edma_slave_config;\n+\ts_ddev->device_get_max_len = edma_get_max_len;\n \ts_ddev->device_pause = edma_dma_pause;\n \ts_ddev->device_resume = edma_dma_resume;\n \ts_ddev->device_terminate_all = edma_terminate_all;\n", "prefixes": [ "4/5" ] }