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=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no 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 A35E1C2D0E4 for ; Mon, 23 Nov 2020 17:02:13 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 D025D20756 for ; Mon, 23 Nov 2020 17:02:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="dmrmNaX1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D025D20756 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 60F4D85EB4; Mon, 23 Nov 2020 17:02:12 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3Q1Qh54dqJy5; Mon, 23 Nov 2020 17:02:11 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id C8BD785D3D; Mon, 23 Nov 2020 17:02:11 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id A4913C0891; Mon, 23 Nov 2020 17:02:11 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 96DB1C0052 for ; Mon, 23 Nov 2020 17:02:09 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 805E387026 for ; Mon, 23 Nov 2020 17:02:09 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2c8Dj8SICh0t for ; Mon, 23 Nov 2020 17:02:08 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from m42-4.mailgun.net (m42-4.mailgun.net [69.72.42.4]) by hemlock.osuosl.org (Postfix) with ESMTPS id BF486870E8 for ; Mon, 23 Nov 2020 17:02:05 +0000 (UTC) DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1606150928; h=Message-ID: References: In-Reply-To: Subject: Cc: To: From: Date: Content-Transfer-Encoding: Content-Type: MIME-Version: Sender; bh=OMLlds5ZASBxc6VI9c5Wt8OmEB5BECKe6YXf0Nc2/+A=; b=dmrmNaX1edMclSQXezDLfNqLnNbD7YC23ZQ0WFnXtZ5WRX6qqz/dwjuBw8DVT6BMfJ+Ir7OQ HdqXWrzpCQZETMBUR9upE0Sior+7yTNLzQCwucr/oe3PvzifTFLrKKk39mZlq/jcRd9nazs+ jqoXWetbkDXJB7kxiY+tj1Kb+uA= X-Mailgun-Sending-Ip: 69.72.42.4 X-Mailgun-Sid: WyI3NDkwMCIsICJpb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n07.prod.us-west-2.postgun.com with SMTP id 5fbbeafe77b63cdb34206c2f (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 23 Nov 2020 17:01:50 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id D1DCAC43467; Mon, 23 Nov 2020 17:01:49 +0000 (UTC) Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: saiprakash.ranjan) by smtp.codeaurora.org (Postfix) with ESMTPSA id 0A71EC433C6; Mon, 23 Nov 2020 17:01:48 +0000 (UTC) MIME-Version: 1.0 Date: Mon, 23 Nov 2020 22:31:48 +0530 From: Sai Prakash Ranjan To: Will Deacon , Rob Clark Subject: Re: [PATCHv8 0/8] System Cache support for GPU and required SMMU support In-Reply-To: <20201123152146.GE11033@willie-the-truck> References: <20201123152146.GE11033@willie-the-truck> Message-ID: <50b68f2bdf9413b896fbe816ba4ddbc9@codeaurora.org> X-Sender: saiprakash.ranjan@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 Cc: Robin Murphy , Akhil P Oommen , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, "Kristian H . Kristensen" , linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On 2020-11-23 20:51, Will Deacon wrote: > On Tue, Nov 17, 2020 at 08:00:39PM +0530, Sai Prakash Ranjan wrote: >> Some hardware variants contain a system cache or the last level >> cache(llc). This cache is typically a large block which is shared >> by multiple clients on the SOC. GPU uses the system cache to cache >> both the GPU data buffers(like textures) as well the SMMU pagetables. >> This helps with improved render performance as well as lower power >> consumption by reducing the bus traffic to the system memory. >> >> The system cache architecture allows the cache to be split into slices >> which then be used by multiple SOC clients. This patch series is an >> effort to enable and use two of those slices preallocated for the GPU, >> one for the GPU data buffers and another for the GPU SMMU hardware >> pagetables. >> >> Patch 1 - Patch 6 adds system cache support in SMMU and GPU driver. >> Patch 7 and 8 are minor cleanups for arm-smmu impl. >> >> Changes in v8: >> * Introduce a generic domain attribute for pagetable config (Will) >> * Rename quirk to more generic IO_PGTABLE_QUIRK_ARM_OUTER_WBWA (Will) >> * Move non-strict mode to use new struct domain_attr_io_pgtbl_config >> (Will) > > Modulo some minor comments I've made, this looks good to me. What is > the > plan for merging it? I can take the IOMMU parts, but patches 4-6 touch > the > MSM GPU driver and I'd like to avoid conflicts with that. > SMMU bits are pretty much independent and GPU relies on the domain attribute and the quirk exposed, so as long as SMMU changes go in first it should be good. Rob? Thanks, Sai -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu