From patchwork Tue Aug 16 11:44:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yicong Yang X-Patchwork-Id: 12944714 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EEE6EC2BB41 for ; Tue, 16 Aug 2022 11:47:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; 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=RFoiwrW59/YsXMK/yQ+lrDTg5G5t4X/l//xXEa0dx3w=; b=B7FID+0cyVtO3P ScT4/vqXq2JEPEjafjGhMwq5/q94r1dt+trovUGG5c23J86ahg0+YvTtnyoT9RqBeTQJk6Et8vCz4 gGl/IF71YujJUnlNUwSHZl3eQU5ARSZPpKdUgy0YqgSvCBhCxk+Av4X2siSCGvfE3plgxqDgU7CIh Pup1vFMMiT6EbO6VoriM9co06BipwR1tMgpI9qmnZVwwZDQma1judkMxEmBBL9bPzdRx991ijOSX4 i3gfo/SVrmDJ+jnby6tY6m7PmC3Sp4/g+Ui3QPNMZLoXEyChGxHMSSn8iFi6m5gr39OH5PilCew2U gKKa+3gRw1o/JDIX/Z4g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oNv1k-001hW2-E8; Tue, 16 Aug 2022 11:46:32 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oNv1e-001hNV-Sj for linux-arm-kernel@lists.infradead.org; Tue, 16 Aug 2022 11:46:30 +0000 Received: from canpemm500009.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4M6TlD6F24zXdbK; Tue, 16 Aug 2022 19:42:00 +0800 (CST) Received: from localhost.localdomain (10.67.164.66) by canpemm500009.china.huawei.com (7.192.105.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Tue, 16 Aug 2022 19:46:11 +0800 From: Yicong Yang To: , , , , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , Subject: [PATCH v12 1/5] iommu/arm-smmu-v3: Make default domain type of HiSilicon PTT device to identity Date: Tue, 16 Aug 2022 19:44:10 +0800 Message-ID: <20220816114414.4092-2-yangyicong@huawei.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220816114414.4092-1-yangyicong@huawei.com> References: <20220816114414.4092-1-yangyicong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.164.66] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To canpemm500009.china.huawei.com (7.192.105.203) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220816_044627_202107_1C1152B7 X-CRM114-Status: GOOD ( 12.78 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Yicong Yang The DMA operations of HiSilicon PTT device can only work properly with identical mappings. So add a quirk for the device to force the domain as passthrough. Acked-by: Will Deacon Signed-off-by: Yicong Yang Reviewed-by: John Garry --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 21 +++++++++++++++++++++ 1 file changed, 21 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 d32b02336411..71f7edded9cf 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2817,6 +2817,26 @@ static int arm_smmu_dev_disable_feature(struct device *dev, } } +/* + * HiSilicon PCIe tune and trace device can be used to trace TLP headers on the + * PCIe link and save the data to memory by DMA. The hardware is restricted to + * use identity mapping only. + */ +#define IS_HISI_PTT_DEVICE(pdev) ((pdev)->vendor == PCI_VENDOR_ID_HUAWEI && \ + (pdev)->device == 0xa12e) + +static int arm_smmu_def_domain_type(struct device *dev) +{ + if (dev_is_pci(dev)) { + struct pci_dev *pdev = to_pci_dev(dev); + + if (IS_HISI_PTT_DEVICE(pdev)) + return IOMMU_DOMAIN_IDENTITY; + } + + return 0; +} + static struct iommu_ops arm_smmu_ops = { .capable = arm_smmu_capable, .domain_alloc = arm_smmu_domain_alloc, @@ -2831,6 +2851,7 @@ static struct iommu_ops arm_smmu_ops = { .sva_unbind = arm_smmu_sva_unbind, .sva_get_pasid = arm_smmu_sva_get_pasid, .page_response = arm_smmu_page_response, + .def_domain_type = arm_smmu_def_domain_type, .pgsize_bitmap = -1UL, /* Restricted during device attach */ .owner = THIS_MODULE, .default_domain_ops = &(const struct iommu_domain_ops) {