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=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 6A1C4C433B4 for ; Thu, 13 May 2021 13:50:40 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 C3114613C5 for ; Thu, 13 May 2021 13:50:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C3114613C5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ZTDPHEGBQbpablKlupD/Tpabwvq2gQzwA5RdAb98ITo=; b=ItR+IIY75VOzGhMZlNbBvXiM4 rt2m5P0edBsUvFpKq5SI+/vt4NxND5YV38uRPzhKk0WnGxkq8GQ1ozBTJy/ylYawkWyQQcTztdkNU ojymf6tqgPNfO47pWVa8mRpNUjRAJ8ioaXaW08i7kNb70SQQJRhHrDA9TLHUNbSwnu5X/BnJZTxpx Z0qOOYkE3xIYYzkvkt0ykkj1tFICcEsXO5niIUshWRKeqpyJNenMds7HA2w8f4jldcYRAbmvnTfW0 JSoeB/wyQfxmAZSn1M09YNrS1TNpXJGkoN7a5AG1KkBCr1ebga3I56Ots/+5Y5f63YPWNPPrat7LQ 1/A2utaWg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lhBhI-005efb-EX; Thu, 13 May 2021 13:48:16 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lhBgM-005eNs-T7 for linux-arm-kernel@desiato.infradead.org; Thu, 13 May 2021 13:47:19 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:CC:To:From:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=npxOUUA+qAqRTzOee+vFMD+o6lO24I1Xwq3hH7pZ1EU=; b=q2g67ubdMfwesI4H2ZFeLm2Rwo BPJzJKz1wh9wyiV9CQ8akEeQL4HouwN2E5VSod3qWJyOm8VyMq0ln9fNrAnlvYI5bFW1jJPAA6E3f JUhMnOnKEtAeOSLqQbCBWElSn+/Jq+MUavWLSSmyISCHemBRvhaeBp9Fz4+B9iZMljLQSZ9awztXQ ucd4iw5+N3T85zzyZa97wbaQ39j7tTck8uKzcVAFKVjq5iZ3S9/cVAOaOvJ9924j9GhOdQSozF/ZM uhgvBfT8olEJYEVwy4k+BIJfm7NDHp4dA6o/FJxGNBPUzTSF73ceZt4NgC4IKDBX3oZYwAp9O32LB antuJmgA==; Received: from szxga04-in.huawei.com ([45.249.212.190]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lhBgK-00BHwd-2e for linux-arm-kernel@lists.infradead.org; Thu, 13 May 2021 13:47:17 +0000 Received: from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FgtD70GSdzqSrx; Thu, 13 May 2021 21:43:51 +0800 (CST) Received: from A2006125610.china.huawei.com (10.47.81.63) by DGGEMS406-HUB.china.huawei.com (10.3.19.206) with Microsoft SMTP Server id 14.3.498.0; Thu, 13 May 2021 21:47:06 +0800 From: Shameer Kolothum To: , , CC: , , , , , , , , , , Subject: [PATCH v4 8/8] iommu/dma: Reserve any RMR regions associated with a dev Date: Thu, 13 May 2021 14:45:50 +0100 Message-ID: <20210513134550.2117-9-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20210513134550.2117-1-shameerali.kolothum.thodi@huawei.com> References: <20210513134550.2117-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.81.63] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210513_064716_461521_67D3B301 X-CRM114-Status: GOOD ( 14.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 | 66 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 61 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 2d9caf548a32..6838caf3e8ff 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -174,22 +174,78 @@ void iommu_put_dma_cookie(struct iommu_domain *domain) } EXPORT_SYMBOL(iommu_put_dma_cookie); +static bool iommu_dma_dev_has_rmr(struct iommu_fwspec *fwspec, + struct iommu_rmr *e) +{ + int i; + + for (i = 0; i < fwspec->num_ids; i++) { + if (e->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_rmr *rmr; + + 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(rmr, &rmr_list, list) { + int prot = IOMMU_READ | IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO; + struct iommu_resv_region *region; + enum iommu_resv_type type; + + if (!iommu_dma_dev_has_rmr(fwspec, rmr)) + continue; + + if (rmr->flags & IOMMU_RMR_REMAP_PERMITTED) + type = IOMMU_RESV_DIRECT_RELAXABLE; + else + type = IOMMU_RESV_DIRECT; + + region = iommu_alloc_resv_region(rmr->base_address, + rmr->length, prot, + type); + if (!region) + return; + + list_add_tail(®ion->list, 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel