From patchwork Thu Jun 24 17:17:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 12342669 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=-14.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 457F1C49EA5 for ; Thu, 24 Jun 2021 17:18:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30D61613FA for ; Thu, 24 Jun 2021 17:18:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232260AbhFXRUq (ORCPT ); Thu, 24 Jun 2021 13:20:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232085AbhFXRUp (ORCPT ); Thu, 24 Jun 2021 13:20:45 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42386C06175F for ; Thu, 24 Jun 2021 10:18:25 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id b3so3308950plg.2 for ; Thu, 24 Jun 2021 10:18:25 -0700 (PDT) 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=XWNwGk9GjelPq0lKH2dxtU8MIJBYkaGELFI1ssqXZTY=; b=axtIMnpDVdkjRLH4nX+f7Hd/a94NGXarbbRZp9pKXtT6TpJu7knFwnxzm/B9XB9U5q ADPy7uRDHNfp2pRHlI7Plj6WxokjAj3ZwsFS7vr4aASPUFiyzw/o62bdKWis8u+5oBW4 Vikei2WzAFO6FSuuPDtR+qxX1leJS0yoWKXB8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=XWNwGk9GjelPq0lKH2dxtU8MIJBYkaGELFI1ssqXZTY=; b=tpzW2FdEhQyJp6o+EpFKvThUUmhVqQHIYtiU2RJ+fHyG3NzABQcPnPKpso+E2y74fE 7aNwIBT8im2zogrJ81nJIO3tcgMljycajIfga7iqidhVKh4XSYY9Y+SZZ4OKK1CUrWWG X877hum/QhWAgg8daLTvbOavDBJByGZMqD6bPwH9pK/fgGGPF27BDaI5pKXNaIJUVXcV Zzz243amWR5EB82kC0hpToDTSABLOmnvxUliSZA4KlBY0RCev1gi55PQbKDpKaZudCLO BKrsKWA0v0jXeIBEvpQtP/P+JsdFH+kPoZ7fIfPBcWmq3Qo0Pl5fJxqvig/3U2+h9Gxd 40bg== X-Gm-Message-State: AOAM531ltBwcYXE6eFJLtlGDo2PBhNXWVFRHWccPHudIbuE+uP8tZvax IBOpTcJ2AA7psCCr3a/eqGNA+Q== X-Google-Smtp-Source: ABdhPJyDDZAEVmImuYqq+gOLGeBE++WkFuVJuSBHo1MrycS/xGTXZy6Yo8US/jLhBHewMabX0cuR6g== X-Received: by 2002:a17:90b:4d8d:: with SMTP id oj13mr6232430pjb.184.1624555104750; Thu, 24 Jun 2021 10:18:24 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:201:fd74:62bc:19e3:a43b]) by smtp.gmail.com with ESMTPSA id z9sm3365960pfa.2.2021.06.24.10.18.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Jun 2021 10:18:24 -0700 (PDT) From: Douglas Anderson To: will@kernel.org, robin.murphy@arm.com, joro@8bytes.org, bjorn.andersson@linaro.org, ulf.hansson@linaro.org, adrian.hunter@intel.com, bhelgaas@google.com Cc: john.garry@huawei.com, robdclark@chromium.org, quic_c_gdjako@quicinc.com, saravanak@google.com, rajatja@google.com, saiprakash.ranjan@codeaurora.org, vbadigan@codeaurora.org, linux-mmc@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org, sonnyrao@chromium.org, joel@joelfernandes.org, Douglas Anderson , Andrew Morton , Jonathan Corbet , Jordan Crouse , Konrad Dybcio , Krishna Reddy , "Maciej W. Rozycki" , Nicolin Chen , "Paul E. McKenney" , Peter Zijlstra , Randy Dunlap , Thierry Reding , Viresh Kumar , Vlastimil Babka , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/3] iommu: Enable non-strict DMA on QCom SD/MMC Date: Thu, 24 Jun 2021 10:17:56 -0700 Message-Id: <20210624171759.4125094-1-dianders@chromium.org> X-Mailer: git-send-email 2.32.0.93.g670b81a890-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The goal of this patch series is to get better SD/MMC performance on Qualcomm eMMC controllers and in generally nudge us forward on the path of allowing some devices to be in strict mode and others to be in non-strict mode. This patch series doesn't save the world but hopefully at least moves us in the right direction while accomplishing something useful. Specifically: - No attempt is made to touch the PCI subsystem or cleanup the way that it requests strict vs. non-strict. - No fully generic mechanism is come up with that makes it super easy for everyone to be in non-strict mode. This patch conflicts with a few other patch series that are in flight. I've tried to call them out "after the cut" in patches. I assume other in flight patches will land before this one, so I'd expect to send a rebased version when that happens, assuming that this series isn't NAKed into the ground. Changes in v2: - No longer based on changes adding strictness to "struct device" - Updated kernel-parameters docs. - Patch moving check for strictness in arm-smmu new for v2. - Now accomplish the goal by putting rules in the IOMMU driver. - Reworded commit message to clarify things pointed out by Greg. Douglas Anderson (3): iommu: Add per-domain strictness and combine with the global default iommu/arm-smmu: Check for strictness after calling impl->init_context() mmc: sdhci-msm: Request non-strict IOMMU mode .../admin-guide/kernel-parameters.txt | 5 ++- drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 19 ++++++++ drivers/iommu/arm/arm-smmu/arm-smmu.c | 6 +-- drivers/iommu/iommu.c | 43 +++++++++++++++---- include/linux/iommu.h | 7 +++ 5 files changed, 67 insertions(+), 13 deletions(-)