From patchwork Tue Apr 20 08:27:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Shameerali Kolothum Thodi X-Patchwork-Id: 12213641 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 7E626C433B4 for ; Tue, 20 Apr 2021 09:29:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4CFB7613AE for ; Tue, 20 Apr 2021 09:29:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231364AbhDTJ3e (ORCPT ); Tue, 20 Apr 2021 05:29:34 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:16608 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231325AbhDTJ3e (ORCPT ); Tue, 20 Apr 2021 05:29:34 -0400 Received: from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FPdc02yFRz19Ln5; Tue, 20 Apr 2021 17:26:40 +0800 (CST) Received: from A2006125610.china.huawei.com (10.47.83.26) by DGGEMS406-HUB.china.huawei.com (10.3.19.206) with Microsoft SMTP Server id 14.3.498.0; Tue, 20 Apr 2021 17:28:51 +0800 From: Shameer Kolothum To: , , CC: , , , , , , , , , Subject: [PATCH v3 08/10] iommu/arm-smmu-v3: Reserve any RMR regions associated with a dev Date: Tue, 20 Apr 2021 10:27:49 +0200 Message-ID: <20210420082751.1829-9-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20210420082751.1829-1-shameerali.kolothum.thodi@huawei.com> References: <20210420082751.1829-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.83.26] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Get RMR regions associated with a dev reserved so that there is a unity mapping for them in SMMU. Signed-off-by: Shameer Kolothum --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 29 +++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 14e9c7034c04..8bacedf7bb34 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2531,6 +2531,34 @@ static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args) return iommu_fwspec_add_ids(dev, args->args, 1); } +static bool arm_smmu_dev_has_rmr(struct arm_smmu_master *master, + struct iommu_rmr *e) +{ + int i; + + for (i = 0; i < master->num_sids; i++) { + if (e->sid == master->sids[i]) + return true; + } + + return false; +} + +static void arm_smmu_rmr_get_resv_regions(struct device *dev, + struct list_head *head) +{ + struct arm_smmu_master *master = dev_iommu_priv_get(dev); + struct arm_smmu_device *smmu = master->smmu; + struct iommu_rmr *rmr; + + list_for_each_entry(rmr, &smmu->rmr_list, list) { + if (!arm_smmu_dev_has_rmr(master, rmr)) + continue; + + iommu_dma_get_rmr_resv_regions(dev, rmr, head); + } +} + static void arm_smmu_get_resv_regions(struct device *dev, struct list_head *head) { @@ -2545,6 +2573,7 @@ static void arm_smmu_get_resv_regions(struct device *dev, list_add_tail(®ion->list, head); iommu_dma_get_resv_regions(dev, head); + arm_smmu_rmr_get_resv_regions(dev, head); } static bool arm_smmu_dev_has_feature(struct device *dev,