From patchwork Mon Sep 30 15:24:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 11166881 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4FF1F14DB for ; Mon, 30 Sep 2019 15:25:41 +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 2E94820815 for ; Mon, 30 Sep 2019 15:25:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="tuBtqEl1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2E94820815 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.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:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=mXw+RXFoV0Dfgp4O0AvTp2KNI/9Y6OC1LVt40qG3rFE=; b=tuBtqEl1ZMq8Nx ddHn77IhklKfOGBzaPRHarz6nmLNAf6RPymuV+XpxYIvv83iKJY0bQea4B6F6RZRZ4yybaF2SRsgD ul2tXZOqXKGMPQ3JzNt8/XYBFa0ztgm7eYhtUfz46/4mb4FaBZUegDAj+WiCSBuidNlFHi5tv0JXu GDRdbwkUMXDOPEpdEuBP0TicM15jOIJRqXzx/iGU+iTGDe2KuULCX577gJC5V5q505wL6uif7Lw2K L6gt1xVa/kaPXPGRn5/YlDYtg5YoYcpyCKyNxOGnwrurJGpfM+Gd4ELGPDNjFZs7lvLVikO6ITn2r 5yLuUa4YSv3k0s0ZCMhA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iExYP-0004Bi-3w; Mon, 30 Sep 2019 15:25:37 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iExYH-00044e-SI for linux-arm-kernel@lists.infradead.org; Mon, 30 Sep 2019 15:25:31 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 80D891000; Mon, 30 Sep 2019 08:25:29 -0700 (PDT) Received: from e110467-lin.cambridge.arm.com (e110467-lin.cambridge.arm.com [10.1.197.57]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 3E29F3F706; Mon, 30 Sep 2019 08:25:28 -0700 (PDT) From: Robin Murphy To: robh@kernel.org, tomeu.vizoso@collabora.com, sudeep.holla@arm.com Subject: [PATCH 2/2] drm/panfrost: Use coherent pagetable walk on Juno Date: Mon, 30 Sep 2019 16:24:59 +0100 Message-Id: <1e499f85220b735849126171e64ebdd1da0302ce.1569856049.git.robin.murphy@arm.com> X-Mailer: git-send-email 2.21.0.dirty In-Reply-To: <88dc6386929b3dcd7a65ba8063628c62b66b330c.1569856049.git.robin.murphy@arm.com> References: <88dc6386929b3dcd7a65ba8063628c62b66b330c.1569856049.git.robin.murphy@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190930_082529_995092_11F5E825 X-CRM114-Status: GOOD ( 11.88 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, lorenzo.pieralisi@arm.com, liviu.dudau@arm.com, dri-devel@lists.freedesktop.org, steven.price@arm.com, 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 Although going full "dma-coherent" ends badly due to GEM objects still being forcibly mapped non-cacheable, we can at least take advantage of Juno's ACE-lite integration to skip cache maintenance for pagetables. CC: Rob Herring CC: Tomeu Vizoso Signed-off-by: Robin Murphy --- This isn't really meant as a series, I'm just sending it together with patch #1 for context. drivers/gpu/drm/panfrost/panfrost_mmu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index bdd990568476..560439f63277 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -365,6 +365,9 @@ int panfrost_mmu_pgtable_alloc(struct panfrost_file_priv *priv) .iommu_dev = pfdev->dev, }; + if (of_device_is_compatible(pfdev->dev->of_node, "arm,juno-mali")) + pfdev->mmu->pgtbl_cfg.coherent_walk = true; + mmu->pgtbl_ops = alloc_io_pgtable_ops(ARM_MALI_LPAE, &mmu->pgtbl_cfg, priv); if (!mmu->pgtbl_ops)