From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18FC6C43381 for ; Thu, 21 Mar 2019 14:19:15 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 92562218E2 for ; Thu, 21 Mar 2019 14:19:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="pM+os4cd"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="uGeYqwd1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 92562218E2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=utwC4M6LE+jFOPF0gptC/TDB209o1biNX4iK2HxQmTk=; b=pM+os4cdqPlvGn cJSAYas2PLClTcczzfyS6xLW2ZqRcH6wZq/Go1YoFT7TIfbneDMHEK+aT/+AOcHt9J1TZ+gm4AFyx UGAn1g5CJAxgzkpHMjEOg/ClwAdbzbZ39oi7N24FxSmqeqT3AlYRtW1IhVZu7Xf5J/jF0QA/9xSli ZMcxubYhJ78319mpBgaKMR+L6H+xqOwEVo6yYrCL8xvMpn9/GpNASm00WiPFLNeEd4GD7NDMiSRX+ dVjL3H87kcqzgRD8jRPCFzNZeXBCscLBG9mkjgwH7EeeKK5kFe+yBT6/6l2J+lcLr4rk3bJNP3MZ+ GIK+C3sbJAzK4dmQamLQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h6yXB-0008CK-H4; Thu, 21 Mar 2019 14:19:05 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h6yX7-0008BE-VK for linux-arm-kernel@lists.infradead.org; Thu, 21 Mar 2019 14:19:03 +0000 Received: from localhost (unknown [106.201.33.144]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5D74E2075E; Thu, 21 Mar 2019 14:18:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553177940; bh=cMkdX0KGpz7di4SCPDDKR2SJsCSmXBjSaNSqEy1Dj78=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=uGeYqwd19QZIfDE/bu9f9CfOXR5scZKz1fPLprGefOJcUjONvKgZio2dOu0OknO7c 87MRaUN2rCPkC672U3+aY1X22GkKfUMlIFv8a+2Rn0wAUK10F2l6RYC6HYfD57kFeV qG1rr/XyeLJroxlqKFxOOtcZWkHAJGkZOGb3azrA= Date: Thu, 21 Mar 2019 19:48:54 +0530 From: Vinod Koul To: Andy Shevchenko Subject: Re: [PATCH v1] dmaengine: idma64: Use actual device for DMA transfers Message-ID: <20190321141854.GA5348@vkoul-mobl> References: <20190318153930.25641-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190318153930.25641-1-andriy.shevchenko@linux.intel.com> User-Agent: Mutt/1.11.3 (2019-02-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190321_071902_052431_37DC10FF X-CRM114-Status: GOOD ( 11.79 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Haojian Zhuang , linux-spi@vger.kernel.org, Mark Brown , linux-arm-kernel@lists.infradead.org, linux-serial@vger.kernel.org, dmaengine@vger.kernel.org, Robert Jarzmik , Daniel Mack Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 18-03-19, 18:39, Andy Shevchenko wrote: > Intel IOMMU, when enabled, tries to find the domain of the device, > assuming it's a PCI one, during DMA operations, such as mapping or > unmapping. Since we are splitting the actual PCI device to couple of > children via MFD framework (see drivers/mfd/intel-lpss.c for details), > the DMA device appears to be a platform one, and thus not an actual one > that performs DMA. In a such situation IOMMU can't find or allocate > a proper domain for its operations. As a result, all DMA operations are > failed. > > In order to fix this, supply parent of the platform device > to the DMA engine framework and fix filter functions accordingly. > > We may rely on the fact that parent is a real PCI device, because no > other configuration is present in the wild. Applied, thanks -- ~Vinod _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel