From patchwork Mon Mar 9 15:17:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jordan Crouse X-Patchwork-Id: 11427367 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 4CE8B139A for ; Mon, 9 Mar 2020 15:17:57 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 2B0A7222D9 for ; Mon, 9 Mar 2020 15:17:57 +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="nbQCtsi5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B0A7222D9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 581BE6E180; Mon, 9 Mar 2020 15:17:54 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail26.static.mailgun.info (mail26.static.mailgun.info [104.130.122.26]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8E7ED6E180 for ; Mon, 9 Mar 2020 15:17:53 +0000 (UTC) DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1583767073; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=YVYbQhWH93yMJttmVAt9QPfzMj6O51Wc3s1MVkrJ7yE=; b=nbQCtsi5fJX6UJuVCcTudsrEbQqkn9ElJ+5ttf5n0CCvmOuhFycdgJYQOEsbdqj2TesMUxJs phBTFmCg5aoGo1I0dTaOcmoWJJPujwdKxIJfmuHcDgM1T9CB41VxsrZlXbS80QWMEh0rmAgh Ve2XbVoQ7g7P/4oEqvLwSvQAIto= X-Mailgun-Sending-Ip: 104.130.122.26 X-Mailgun-Sid: WyJkOTU5ZSIsICJkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e665e20.7f2937357c70-smtp-out-n03; Mon, 09 Mar 2020 15:17:52 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 832B2C44798; Mon, 9 Mar 2020 15:17:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from jcrouse1-lnx.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jcrouse) by smtp.codeaurora.org (Postfix) with ESMTPSA id 1B462C433D2; Mon, 9 Mar 2020 15:17:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 1B462C433D2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=jcrouse@codeaurora.org From: Jordan Crouse To: linux-arm-msm@vger.kernel.org Subject: [PATCH v5 0/2] msm/gpu/a6xx: use the DMA-API for GMU memory allocations Date: Mon, 9 Mar 2020 09:17:44 -0600 Message-Id: <1583767066-1555-1-git-send-email-jcrouse@codeaurora.org> X-Mailer: git-send-email 2.7.4 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, David Airlie , linux-kernel@vger.kernel.org, smasetty@codeaurora.org, Douglas Anderson , dri-devel@lists.freedesktop.org, Stephen Boyd , "Michael J. Ruhl" , Rob Herring , freedreno@lists.freedesktop.org, Sean Paul , Brian Masney MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" When CONFIG_INIT_ON_ALLOC_DEFAULT_ON the GMU memory allocator runs afoul of cache coherency issues because it is mapped as write-combine without clearing the cache after it was zeroed. Rather than duplicate the hacky workaround we use in the GEM allocator for the same reason it turns out that we don't need to have a bespoke memory allocator for the GMU anyway. It uses a flat, global address space and there are only two relatively minor allocations anyway. In short, this is essentially what the DMA API was created for so replace a bunch of memory management code with two calls to allocate and free DMA memory and we're fine. In a previous version of this series I added the dma-ranges property to the device tree file for the GMU and updated the bindings to YAML. Rob correctly pointed out that we didn't need dma-ranges any more but I'm still pushing the YAML conversion because it is good and we'll eventually need it anyway so why not. v5: Refresh on Brian Masney's patch that removes sram from gmu.txt [1] v4: Use dma_alloc_wc() wrappers per Michael Ruhl. v3: Fix YAML description per RobH and remove dma-ranges and replace it with the correct DMA mask in the GMU device. Convert the iova type to a dma_attr_t to make it 32 bit friendly. v2: Fix the example bindings for dma-ranges - the third item is the size Pass false to of_dma_configure so that it fails probe if the DMA region is not set up. [1] https://patchwork.freedesktop.org/patch/356869/?series=74446&rev=1 Jordan Crouse (2): dt-bindings: display: msm: Convert GMU bindings to YAML drm/msm/a6xx: Use the DMA API for GMU memory objects .../devicetree/bindings/display/msm/gmu.txt | 65 ----------- .../devicetree/bindings/display/msm/gmu.yaml | 123 +++++++++++++++++++++ drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 113 ++----------------- drivers/gpu/drm/msm/adreno/a6xx_gmu.h | 6 +- 4 files changed, 135 insertions(+), 172 deletions(-) delete mode 100644 Documentation/devicetree/bindings/display/msm/gmu.txt create mode 100644 Documentation/devicetree/bindings/display/msm/gmu.yaml