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=-8.8 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,URIBL_BLOCKED,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 ABCDEC28CC2 for ; Wed, 29 May 2019 20:56:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 83F16241C6 for ; Wed, 29 May 2019 20:56:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="lBBCCLNW"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="lBBCCLNW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726540AbfE2UzK (ORCPT ); Wed, 29 May 2019 16:55:10 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:55310 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726186AbfE2UzJ (ORCPT ); Wed, 29 May 2019 16:55:09 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id DDD9E607C3; Wed, 29 May 2019 20:55:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1559163307; bh=H1gJftayyhVU3QVkkOlFv2DhgJ/CrcDyVexTTU22x4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lBBCCLNWLtMP6MTlifW0/hhWULMbqAHn8agLMArTbyVmXfLZY0mTYUbtDvXrhGJRB +rMjk9pU/Y5kmWw2na3O35JtABPJw1UFGa73g5+eW6WGZz0ZGgzD6SIKgOIL0poPBS VGANA337XjlLLCTgDmOZQgtPBQchIWcqJZaSBX0U= 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@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id F21AB606DB; Wed, 29 May 2019 20:55:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1559163307; bh=H1gJftayyhVU3QVkkOlFv2DhgJ/CrcDyVexTTU22x4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lBBCCLNWLtMP6MTlifW0/hhWULMbqAHn8agLMArTbyVmXfLZY0mTYUbtDvXrhGJRB +rMjk9pU/Y5kmWw2na3O35JtABPJw1UFGa73g5+eW6WGZz0ZGgzD6SIKgOIL0poPBS VGANA337XjlLLCTgDmOZQgtPBQchIWcqJZaSBX0U= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org F21AB606DB Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=jcrouse@codeaurora.org From: Jordan Crouse To: freedreno@lists.freedesktop.org Cc: jean-philippe.brucker@arm.com, linux-arm-msm@vger.kernel.org, hoegsberg@google.com, dianders@chromium.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Robin Murphy , Will Deacon , Joerg Roedel , linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 01/16] iommu/arm-smmu: Allow client devices to select direct mapping Date: Wed, 29 May 2019 14:54:37 -0600 Message-Id: <1559163292-4792-2-git-send-email-jcrouse@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1559163292-4792-1-git-send-email-jcrouse@codeaurora.org> References: <1559163292-4792-1-git-send-email-jcrouse@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org 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. v3: use iommu_request_dm_for_dev() to set up a default identity domain for a group, per Robin Signed-off-by: Jordan Crouse --- drivers/iommu/arm-smmu.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 5e54cc0..7537639 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1235,6 +1235,35 @@ static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain, return 0; } +struct arm_smmu_client_match_data { + bool direct_mapping; +}; + +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 arm_smmu_client_of_match[] = { + { .compatible = "qcom,adreno", .data = &qcom_adreno }, + { .compatible = "qcom,mdp4", .data = &qcom_mdss }, + { .compatible = "qcom,mdss", .data = &qcom_mdss }, + { .compatible = "qcom,sdm845-mdss", .data = &qcom_mdss }, + {}, +}; + +static const struct arm_smmu_client_match_data * +arm_smmu_client_data(struct device *dev) +{ + const struct of_device_id *match = + of_match_device(arm_smmu_client_of_match, dev); + + return match ? match->data : NULL; +} + static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) { int ret; @@ -1450,6 +1479,7 @@ static int arm_smmu_add_device(struct device *dev) struct arm_smmu_device *smmu; struct arm_smmu_master_cfg *cfg; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + const struct arm_smmu_client_match_data *client; int i, ret; if (using_legacy_binding) { @@ -1512,6 +1542,11 @@ static int arm_smmu_add_device(struct device *dev) device_link_add(dev, smmu->dev, DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_SUPPLIER); + client = arm_smmu_client_data(dev); + + if (client && client->direct_mapping) + iommu_request_dm_for_dev(dev); + return 0; out_cfg_free: -- 2.7.4