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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 70DE4C2D0DB for ; Wed, 22 Jan 2020 11:48:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 43C7621734 for ; Wed, 22 Jan 2020 11:48:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="em9wha8l" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729030AbgAVLse (ORCPT ); Wed, 22 Jan 2020 06:48:34 -0500 Received: from mail25.static.mailgun.info ([104.130.122.25]:41754 "EHLO mail25.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726191AbgAVLse (ORCPT ); Wed, 22 Jan 2020 06:48:34 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1579693713; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=FZ071Y+ZSAFUrH83cN0WG3lRWXwhXgDK4mXEYqKVUkE=; b=em9wha8lKvp3oIodbs6R/di5UBoO0sJjSOPwZ8Gpnhz6O3d2yYj1BolOIJTunWDPc8sib7LG smad6zGDroP6OHmRVhYPesp/KY4ocwm7XlfguMhRvOu98W/qlmuyiC01p1oHtuJR7KKOVzJP avYsHm+5Td0ImHZHEZygdooaQ6w= X-Mailgun-Sending-Ip: 104.130.122.25 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== 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 5e28368f.7f9dd0d4ce68-smtp-out-n01; Wed, 22 Jan 2020 11:48:31 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 86FF7C447AB; Wed, 22 Jan 2020 11:48:31 +0000 (UTC) Received: from blr-ubuntu-253.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: saiprakash.ranjan) by smtp.codeaurora.org (Postfix) with ESMTPSA id 6B77FC4479C; Wed, 22 Jan 2020 11:48:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 6B77FC4479C 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=saiprakash.ranjan@codeaurora.org From: Sai Prakash Ranjan To: Will Deacon , Robin Murphy , Joerg Roedel , Jordan Crouse , Rob Clark Cc: iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Stephen Boyd , Matthias Kaehlcke , Bjorn Andersson , Rajendra Nayak , Tomasz Figa , Sai Prakash Ranjan Subject: [PATCH 2/2] iommu/arm-smmu: Allow client devices to select direct mapping Date: Wed, 22 Jan 2020 17:18:02 +0530 Message-Id: <813cc5b2da10c27db982254b274bf26008a9e6da.1579692800.git.saiprakash.ranjan@codeaurora.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Jordan Crouse Some client devices want to directly map the IOMMU themselves instead of using the DMA domain. Allow those devices to opt in to direct mapping by way of a list of compatible strings. Signed-off-by: Jordan Crouse Co-developed-by: Sai Prakash Ranjan Signed-off-by: Sai Prakash Ranjan --- drivers/iommu/arm-smmu-qcom.c | 39 +++++++++++++++++++++++++++++++++++ drivers/iommu/arm-smmu.c | 3 +++ drivers/iommu/arm-smmu.h | 5 +++++ 3 files changed, 47 insertions(+) diff --git a/drivers/iommu/arm-smmu-qcom.c b/drivers/iommu/arm-smmu-qcom.c index 64a4ab270ab7..ff746acd1c81 100644 --- a/drivers/iommu/arm-smmu-qcom.c +++ b/drivers/iommu/arm-smmu-qcom.c @@ -3,6 +3,7 @@ * Copyright (c) 2019, The Linux Foundation. All rights reserved. */ +#include #include #include "arm-smmu.h" @@ -11,6 +12,43 @@ struct qcom_smmu { struct arm_smmu_device smmu; }; +static const struct arm_smmu_client_match_data qcom_adreno = { + .direct_mapping = true, +}; + +static const struct arm_smmu_client_match_data qcom_mdss = { + .direct_mapping = true, +}; + +static const struct of_device_id qcom_smmu_client_of_match[] = { + { .compatible = "qcom,adreno", .data = &qcom_adreno }, + { .compatible = "qcom,mdp4", .data = &qcom_mdss }, + { .compatible = "qcom,mdss", .data = &qcom_mdss }, + { .compatible = "qcom,sc7180-mdss", .data = &qcom_mdss }, + { .compatible = "qcom,sdm845-mdss", .data = &qcom_mdss }, + {}, +}; + +static const struct arm_smmu_client_match_data * +qcom_smmu_client_data(struct device *dev) +{ + const struct of_device_id *match = + of_match_device(qcom_smmu_client_of_match, dev); + + return match ? match->data : NULL; +} + +static int qcom_smmu_request_domain(struct device *dev) +{ + const struct arm_smmu_client_match_data *client; + + client = qcom_smmu_client_data(dev); + if (client) + iommu_request_dm_for_dev(dev); + + return 0; +} + static int qcom_sdm845_smmu500_reset(struct arm_smmu_device *smmu) { int ret; @@ -41,6 +79,7 @@ static int qcom_smmu500_reset(struct arm_smmu_device *smmu) } static const struct arm_smmu_impl qcom_smmu_impl = { + .req_domain = qcom_smmu_request_domain, .reset = qcom_smmu500_reset, }; diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 16c4b87af42b..67dd9326247a 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1448,6 +1448,9 @@ static int arm_smmu_add_device(struct device *dev) device_link_add(dev, smmu->dev, DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_SUPPLIER); + if (smmu->impl && smmu->impl->req_domain) + return smmu->impl->req_domain(dev); + return 0; out_cfg_free: diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h index 8d1cd54d82a6..059dc9c39f64 100644 --- a/drivers/iommu/arm-smmu.h +++ b/drivers/iommu/arm-smmu.h @@ -244,6 +244,10 @@ enum arm_smmu_arch_version { ARM_SMMU_V2, }; +struct arm_smmu_client_match_data { + bool direct_mapping; +}; + enum arm_smmu_implementation { GENERIC_SMMU, ARM_MMU500, @@ -386,6 +390,7 @@ struct arm_smmu_impl { int (*init_context)(struct arm_smmu_domain *smmu_domain); void (*tlb_sync)(struct arm_smmu_device *smmu, int page, int sync, int status); + int (*req_domain)(struct device *dev); }; static inline void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n) -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation