From patchwork Mon Jan 23 20:35:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 13112962 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5261CC25B50 for ; Mon, 23 Jan 2023 20:37:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233079AbjAWUhH (ORCPT ); Mon, 23 Jan 2023 15:37:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37490 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232954AbjAWUgq (ORCPT ); Mon, 23 Jan 2023 15:36:46 -0500 Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2046.outbound.protection.outlook.com [40.107.94.46]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54C8C3646D; Mon, 23 Jan 2023 12:36:28 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ALtUwrP9Gurrauo70Pb71n7L3FFql1sw7qy4mLrrOK9DhbHYiv5nZ5wKZP/3JADMQX3rxleO4geAA2CXO/mVnFpTnzDZ+mVyEk4uC1M8bYQ2gu+MWYMZ9aLrbGVrKPeU7vWfsQoD06Fa1EDKxZKuyAqUP6g/OTEm71IgoFgYcU616/6rUVTktLhFaiS9mLXsmy7tIgMiLa2vIf1IEvqng645JsQsW7JDRunyLVcLkE/6O1A9gU28zT0AMa4MPUosSX3l5epG6IQmAJYZKSmeDl2SUD0RwnjKFVlksWbGjxyyY7L8L0zDgvdv79fsm9RpSFueHciYh1htWiNLTbrXxw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=7YvAgjs2Gj01CDFnHkr1OBh2RqOFGO5naa0J3OW2sFA=; b=TEv53GbdeLgA5V0BINniiz8Zdv+McTSld2v9Mqp/g/byURUsjbQ+0SzqpeOSZQmd7FR74oB9VnVVWyQwRe5J02ruAn/NzOvvlKipdbcsdG/cQ1ijYaXvY8o2BxWn5Oy1mGDOAadfLDM6RnOPlif35Q3MoZZ3OcQZ+oUDZYRUgkMLClK76S1XysxGM8Ku0KfBzMYoQWn6oxjfS9ut3i03dM3y03uUDxPy8nY0ej0tlcV1YAmBTtLxSYr+1BU+UiOWrLDjZdHaBVVerw8bST/RRwTY9Xc6Gdi0/GdfCJ2qdJyBnH4BQgpmCYuL4i7uNx6sd7QenviAh4KqVoqPSXZtHw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=7YvAgjs2Gj01CDFnHkr1OBh2RqOFGO5naa0J3OW2sFA=; b=oPL4613czCk0zwK59crO4LB0Rhq8wsayS5orXmzFdAD1Vt2uom300aFtM74nIH3Q4oVPl+MA0SAoBbuDRQTZNzE1KX8StUPQSvy1V30FGwwyEeoxrlhGVVFKMJX+AY7dbFFf83+sUs3S9G4807Sb9j2/EHcBQ9q+ooWELnmCzLEJaUX/qxHp67tnY6D31RKfgLB3+k5qs+hW032MpJVKg2JkiIh3Ujk3IBQ9JnIl2b152Ypv3JuDtD7WCFU9kzj9l7qDjbdAjNG2jVw3L+bTaKOYTTBg2xo1U16PdXVEyyC2fu5fVzKa9kQ/gqX1GNo9U814HEokTBljTC6roKlWMw== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) by BL3PR12MB6571.namprd12.prod.outlook.com (2603:10b6:208:38e::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6002.25; Mon, 23 Jan 2023 20:36:07 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::3cb3:2fce:5c8f:82ee]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::3cb3:2fce:5c8f:82ee%4]) with mapi id 15.20.6002.033; Mon, 23 Jan 2023 20:36:07 +0000 From: Jason Gunthorpe To: Lu Baolu , Joerg Roedel , Kevin Tian , Matthew Rosato , Robin Murphy Cc: Alex Williamson , ath10k@lists.infradead.org, ath11k@lists.infradead.org, Christian Borntraeger , dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, linux-rdma@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-tegra@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, nouveau@lists.freedesktop.org, Niklas Schnelle , virtualization@lists.linux-foundation.org Subject: [PATCH v3 03/10] iommu: Add a gfp parameter to iommu_map_sg() Date: Mon, 23 Jan 2023 16:35:56 -0400 Message-Id: <3-v3-76b587fe28df+6e3-iommu_map_gfp_jgg@nvidia.com> In-Reply-To: <0-v3-76b587fe28df+6e3-iommu_map_gfp_jgg@nvidia.com> References: X-ClientProxiedBy: MN2PR03CA0005.namprd03.prod.outlook.com (2603:10b6:208:23a::10) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|BL3PR12MB6571:EE_ X-MS-Office365-Filtering-Correlation-Id: ff729660-5aae-41f2-6281-08dafd81736e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:LV2PR12MB5869.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230022)(4636009)(346002)(39860400002)(136003)(366004)(376002)(396003)(451199015)(5660300002)(316002)(8936002)(7416002)(41300700001)(38100700002)(110136005)(36756003)(186003)(83380400001)(478600001)(6666004)(86362001)(6512007)(6506007)(6486002)(26005)(66476007)(8676002)(66946007)(4326008)(2616005)(54906003)(2906002)(66556008)(4216001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: ff729660-5aae-41f2-6281-08dafd81736e X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jan 2023 20:36:05.6662 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 35jcedsy/7n90zhFPuVxA9wN95FAcLfRtOVX4byuz9vQbjsO66zl92LqCX+B0Wr0 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6571 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org Follow the pattern for iommu_map() and remove iommu_map_sg_atomic(). This allows __iommu_dma_alloc_noncontiguous() to use a GFP_KERNEL allocation here, based on the provided gfp flags. Reviewed-by: Kevin Tian Signed-off-by: Jason Gunthorpe --- drivers/iommu/dma-iommu.c | 5 +++-- drivers/iommu/iommu.c | 26 ++++++++++---------------- include/linux/iommu.h | 18 +++++------------- 3 files changed, 18 insertions(+), 31 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 7016db569f81fc..72cfa24503b8bc 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -833,7 +833,8 @@ static struct page **__iommu_dma_alloc_noncontiguous(struct device *dev, arch_dma_prep_coherent(sg_page(sg), sg->length); } - ret = iommu_map_sg_atomic(domain, iova, sgt->sgl, sgt->orig_nents, ioprot); + ret = iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, ioprot, + GFP_ATOMIC); if (ret < 0 || ret < size) goto out_free_sg; @@ -1281,7 +1282,7 @@ static int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, * We'll leave any physical concatenation to the IOMMU driver's * implementation - it knows better than we do. */ - ret = iommu_map_sg_atomic(domain, iova, sg, nents, prot); + ret = iommu_map_sg(domain, iova, sg, nents, prot, GFP_ATOMIC); if (ret < 0 || ret < iova_len) goto out_free_iova; diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 9412b420d07257..cc6e7c6bf72758 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2470,9 +2470,9 @@ size_t iommu_unmap_fast(struct iommu_domain *domain, } EXPORT_SYMBOL_GPL(iommu_unmap_fast); -static ssize_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova, - struct scatterlist *sg, unsigned int nents, int prot, - gfp_t gfp) +ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, + struct scatterlist *sg, unsigned int nents, int prot, + gfp_t gfp) { const struct iommu_domain_ops *ops = domain->ops; size_t len = 0, mapped = 0; @@ -2480,6 +2480,13 @@ static ssize_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova, unsigned int i = 0; int ret; + might_sleep_if(gfpflags_allow_blocking(gfp)); + + /* Discourage passing strange GFP flags */ + if (WARN_ON_ONCE(gfp & (__GFP_COMP | __GFP_DMA | __GFP_DMA32 | + __GFP_HIGHMEM))) + return -EINVAL; + while (i <= nents) { phys_addr_t s_phys = sg_phys(sg); @@ -2519,21 +2526,8 @@ static ssize_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova, return ret; } - -ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, - struct scatterlist *sg, unsigned int nents, int prot) -{ - might_sleep(); - return __iommu_map_sg(domain, iova, sg, nents, prot, GFP_KERNEL); -} EXPORT_SYMBOL_GPL(iommu_map_sg); -ssize_t iommu_map_sg_atomic(struct iommu_domain *domain, unsigned long iova, - struct scatterlist *sg, unsigned int nents, int prot) -{ - return __iommu_map_sg(domain, iova, sg, nents, prot, GFP_ATOMIC); -} - /** * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework * @domain: the iommu domain where the fault has happened diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 521cd79700f4d8..d5c16dc33c87de 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -474,10 +474,8 @@ extern size_t iommu_unmap_fast(struct iommu_domain *domain, unsigned long iova, size_t size, struct iommu_iotlb_gather *iotlb_gather); extern ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, - struct scatterlist *sg, unsigned int nents, int prot); -extern ssize_t iommu_map_sg_atomic(struct iommu_domain *domain, - unsigned long iova, struct scatterlist *sg, - unsigned int nents, int prot); + struct scatterlist *sg, unsigned int nents, + int prot, gfp_t gfp); extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova); extern void iommu_set_fault_handler(struct iommu_domain *domain, iommu_fault_handler_t handler, void *token); @@ -791,14 +789,7 @@ static inline size_t iommu_unmap_fast(struct iommu_domain *domain, static inline ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, struct scatterlist *sg, - unsigned int nents, int prot) -{ - return -ENODEV; -} - -static inline ssize_t iommu_map_sg_atomic(struct iommu_domain *domain, - unsigned long iova, struct scatterlist *sg, - unsigned int nents, int prot) + unsigned int nents, int prot, gfp_t gfp) { return -ENODEV; } @@ -1109,7 +1100,8 @@ iommu_get_domain_for_dev_pasid(struct device *dev, ioasid_t pasid, static inline size_t iommu_map_sgtable(struct iommu_domain *domain, unsigned long iova, struct sg_table *sgt, int prot) { - return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot); + return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot, + GFP_KERNEL); } #ifdef CONFIG_IOMMU_DEBUGFS