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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,URIBL_RED, 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 D96DAC4338F for ; Thu, 5 Aug 2021 08:10:04 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A2B4A61050 for ; Thu, 5 Aug 2021 08:10:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A2B4A61050 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 72C28606FA; Thu, 5 Aug 2021 08:10:04 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id v94HP87pDFdh; Thu, 5 Aug 2021 08:10:03 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTPS id 6DFC560597; Thu, 5 Aug 2021 08:10:03 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 56CE3C001A; Thu, 5 Aug 2021 08:10:03 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 41725C000E for ; Thu, 5 Aug 2021 08:10:01 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 3140C40379 for ; Thu, 5 Aug 2021 08:10:01 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WhGsNqoLQ1pq for ; Thu, 5 Aug 2021 08:10:00 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by smtp4.osuosl.org (Postfix) with ESMTPS id 5558140286 for ; Thu, 5 Aug 2021 08:10:00 +0000 (UTC) Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4GgLqp4z5jz6G9VM; Thu, 5 Aug 2021 16:09:42 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml714-chm.china.huawei.com (10.206.15.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 5 Aug 2021 10:09:58 +0200 Received: from A2006125610.china.huawei.com (10.47.91.4) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 5 Aug 2021 09:09:51 +0100 From: Shameer Kolothum To: , , Subject: [PATCH v7 9/9] iommu/dma: Reserve any RMR regions associated with a dev Date: Thu, 5 Aug 2021 09:07:24 +0100 Message-ID: <20210805080724.480-10-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20210805080724.480-1-shameerali.kolothum.thodi@huawei.com> References: <20210805080724.480-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.91.4] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Cc: robin.murphy@arm.com, jon@solid-run.com, linuxarm@huawei.com, steven.price@arm.com, guohanjun@huawei.com, yangyicong@huawei.com, Sami.Mujawar@arm.com, will@kernel.org, wanghuiqiang@huawei.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Get ACPI IORT 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/dma-iommu.c | 56 +++++++++++++++++++++++++++++++++++---- 1 file changed, 51 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 1b6e27475279..c1ae0c3d4b33 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -207,22 +207,68 @@ void iommu_dma_put_rmrs(struct fwnode_handle *iommu_fwnode, } EXPORT_SYMBOL(iommu_dma_put_rmrs); +static bool iommu_dma_dev_has_rmr(struct iommu_fwspec *fwspec, + struct iommu_resv_region *e) +{ + int i; + + for (i = 0; i < fwspec->num_ids; i++) { + if (e->fw_data.rmr.sid == fwspec->ids[i]) + return true; + } + + return false; +} + +static void iommu_dma_get_rmr_resv_regions(struct device *dev, + struct list_head *list) +{ + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + struct list_head rmr_list; + struct iommu_resv_region *rmr, *tmp; + + INIT_LIST_HEAD(&rmr_list); + if (iommu_dma_get_rmrs(fwspec->iommu_fwnode, &rmr_list)) + return; + + if (dev_is_pci(dev)) { + struct pci_dev *pdev = to_pci_dev(dev); + struct pci_host_bridge *host = pci_find_host_bridge(pdev->bus); + + if (!host->preserve_config) + return; + } + + list_for_each_entry_safe(rmr, tmp, &rmr_list, list) { + if (!iommu_dma_dev_has_rmr(fwspec, rmr)) + continue; + + /* Remove from iommu RMR list and add to dev resv_regions */ + list_del_init(&rmr->list); + list_add_tail(&rmr->list, list); + } + + iommu_dma_put_rmrs(fwspec->iommu_fwnode, &rmr_list); +} + /** * iommu_dma_get_resv_regions - Reserved region driver helper * @dev: Device from iommu_get_resv_regions() * @list: Reserved region list from iommu_get_resv_regions() * * IOMMU drivers can use this to implement their .get_resv_regions callback - * for general non-IOMMU-specific reservations. Currently, this covers GICv3 - * ITS region reservation on ACPI based ARM platforms that may require HW MSI - * reservation. + * for general non-IOMMU-specific reservations. Currently this covers, + * -GICv3 ITS region reservation on ACPI based ARM platforms that may + * require HW MSI reservation. + * -Any ACPI IORT RMR memory range reservations (IORT spec rev E.b) */ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list) { - if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode)) + if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode)) { iort_iommu_msi_get_resv_regions(dev, list); - + iommu_dma_get_rmr_resv_regions(dev, list); + } } EXPORT_SYMBOL(iommu_dma_get_resv_regions); -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu