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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A70BC433F5 for ; Tue, 23 Nov 2021 11:21:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235321AbhKWLYT (ORCPT ); Tue, 23 Nov 2021 06:24:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47182 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235207AbhKWLYS (ORCPT ); Tue, 23 Nov 2021 06:24:18 -0500 Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1429C06173E for ; Tue, 23 Nov 2021 03:21:10 -0800 (PST) Received: by mail-pl1-x632.google.com with SMTP id y8so16816083plg.1 for ; Tue, 23 Nov 2021 03:21:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=5/NUU473gHgJJWAHyz9icycAmdo+qfzcO9MMsTUYLCA=; b=Ka+/WtPAVKmsC47ebx/EttMPimSyaFaQsXvSwohDRgg53jo8emMNbvUMSjBffFZJiF 6mmEV31XO/9nn98pDJV/kWkNmFi5luffIqiHkegaqh/MUKTubaMVlPLwa07SSu/o/XsD 8ngdYw/RZqDR/Hmx12cSy0gEWVZ3Gd2d3Mktk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=5/NUU473gHgJJWAHyz9icycAmdo+qfzcO9MMsTUYLCA=; b=mXXQkPYSB+wq3IQl1tULgK+HGjMJ3qD+Sb+GhdthzH9pq/pW3fAcF15jqJxcit13Tv qc25AEelZW/WivI8J+pF+sEIc/vEnA+UOFWhss69buxbH33X8C611x1fPl1QgR5Hwoln 7p17lzU/m1oXv3D1PRsHov+C/6uaVR7U+bmYYnmG9xQjUrUg9tWEvveXWINU7s4zS5cX Nncax7qWwn10+xgHozH8Cb0Qsx/7rsoZUFrNV0f3VwGL2KomvzbEWyiS48OW3xi3tGBi a+WP0jLTAtv3W7cf6Wic78tSd3W2o98iZDi3nuuZYdMtNJWRmEhr/fn7xf8yd14HIlyS 1KuA== X-Gm-Message-State: AOAM531fzhXUi8UlPsR2Nm+YtrMkUzUEczPU0pgLc1A0q929o21g5ZHK pJzZe8T6bS9lwMop9cVRTjJJwiJXPLP+SA== X-Google-Smtp-Source: ABdhPJzZX7TeNDOF6tm1dgQN6UgDtm8Er0h77Xe7AqW6C2wdt/CMcVsKuhDG9eZ4EtpKo4xugVw3nw== X-Received: by 2002:a17:902:e5ce:b0:142:780:78db with SMTP id u14-20020a170902e5ce00b00142078078dbmr5853227plf.12.1637666470227; Tue, 23 Nov 2021 03:21:10 -0800 (PST) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:d1ae:c331:ed2a:15e9]) by smtp.gmail.com with ESMTPSA id 63sm11093914pfz.119.2021.11.23.03.21.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Nov 2021 03:21:09 -0800 (PST) From: Hsin-Yi Wang To: Christoph Hellwig Cc: Marek Szyprowski , Robin Murphy , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Rob Herring , Maxime Ripard , - , devicetree@vger.kernel.org, Matthias Brugger , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, senozhatsky@chromium.org, tfiga@chromium.org Subject: [PATCH 0/3] Allow restricted-dma-pool to customize IO_TLB_SEGSIZE Date: Tue, 23 Nov 2021 19:21:01 +0800 Message-Id: <20211123112104.3530135-1-hsinyi@chromium.org> X-Mailer: git-send-email 2.34.0.rc2.393.gf8c9666880-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Default IO_TLB_SEGSIZE (128) slabs may be not enough for some use cases. This series adds support to customize io_tlb_segsize for each restricted-dma-pool. Example use case: mtk-isp drivers[1] are controlled by mtk-scp[2] and allocate memory through mtk-scp. In order to use the noncontiguous DMA API[3], we need to use the swiotlb pool. mtk-scp needs to allocate memory with 2560 slabs. mtk-isp drivers also needs to allocate memory with 200+ slabs. Both are larger than the default IO_TLB_SEGSIZE (128) slabs. [1] (not in upstream) https://patchwork.kernel.org/project/linux-media/cover/20190611035344.29814-1-jungo.lin@mediatek.com/ [2] https://elixir.bootlin.com/linux/latest/source/drivers/remoteproc/mtk_scp.c [3] https://patchwork.kernel.org/project/linux-media/cover/20210909112430.61243-1-senozhatsky@chromium.org/ Hsin-Yi Wang (3): dma: swiotlb: Allow restricted-dma-pool to customize IO_TLB_SEGSIZE dt-bindings: Add io-tlb-segsize property for restricted-dma-pool arm64: dts: mt8183: use restricted swiotlb for scp mem .../reserved-memory/shared-dma-pool.yaml | 8 +++++ .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 4 +-- include/linux/swiotlb.h | 1 + kernel/dma/swiotlb.c | 34 ++++++++++++++----- 4 files changed, 37 insertions(+), 10 deletions(-) -- 2.34.0.rc2.393.gf8c9666880-goog