Message ID | 20240906004038.800613-2-witu@nvidia.com |
---|---|
State | New |
Headers | show
Return-Path: <kernel-team-bounces@lists.ubuntu.com> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com (client-ip=185.125.189.65; helo=lists.ubuntu.com; envelope-from=kernel-team-bounces@lists.ubuntu.com; receiver=patchwork.ozlabs.org) Received: from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4X0HTl1v0Cz1yhD for <incoming@patchwork.ozlabs.org>; Fri, 6 Sep 2024 10:41:14 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=lists.ubuntu.com) by lists.ubuntu.com with esmtp (Exim 4.86_2) (envelope-from <kernel-team-bounces@lists.ubuntu.com>) id 1smN24-0001vA-1O; Fri, 06 Sep 2024 00:41:00 +0000 Received: from mail-bn8nam12on2045.outbound.protection.outlook.com ([40.107.237.45] helo=NAM12-BN8-obe.outbound.protection.outlook.com) by lists.ubuntu.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from <witu@nvidia.com>) id 1smN21-0001um-FY for kernel-team@lists.ubuntu.com; Fri, 06 Sep 2024 00:40:57 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=UcN06mtwIf3Kv5LLMYC40UiFdnOVNTSMrdWmkPiiIQbyLRLh7bFzvWyybxH6rdWc6ZBDAA4NB8cl9fowkZH15WpRPsMVfiAn/CRfASIymdaf2bXS7sGCybI7FvWucPJaGVblrhXsx4F8T0C0G1RGGg9J9n+bgO0V+Ptao9zJruCaf+Tzwwv4A+8TKftXckzpO3PT07gCOshT1njE/pqGtbHLt73n1qeRfa3stcjSVjVYHg3KYkaxwuQwqP2KLXLdGjko7cQ+FHuFVP9Nl2P9blirZcYxVU9niLX7hAf+K+ClI6Wr7Fp/McelapgHp0Mv8L7aUMy3KwluFu9DuNuDQw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=23STIrtpTrBBp//iP2u04AaBgq1/lAD+tvhQ9GGrU1s=; b=HpA21db0mLVo3jWPR8DiPJT3z3al8Slpi2q4+hgZE+aD3RIHmmfYM657nyMAKwf1TnpB1AjZm2GglAb3FmOZId8H75OPKuzI9yzWQpuiu8A7qOKl9XydcQD+I+vqFJPzQqt3gwUFXSczxWO2jOANDqzitiQJSP95UIcUeUy2EZtYhUGpJLquzgf/pjx2nF0CE03LFVAIFAwCgG9oU8QqjRFZeUGl2o/d8TcI67hs7qDi45M0A9PDxgmdasnuHeW6kTRefobw6Hcnr1Coow1flt0Ia8lMTOX9Lhb6KsgqAvGJav99F25+7QsFxCIf+Ze58JP1EdT/SIqM+so8jV6Pbw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.118.233) smtp.rcpttodomain=lists.ubuntu.com smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none (0) Received: from PH0PR07CA0054.namprd07.prod.outlook.com (2603:10b6:510:e::29) by CH3PR12MB8481.namprd12.prod.outlook.com (2603:10b6:610:157::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7918.27; Fri, 6 Sep 2024 00:40:52 +0000 Received: from SN1PEPF0002529D.namprd05.prod.outlook.com (2603:10b6:510:e:cafe::96) by PH0PR07CA0054.outlook.office365.com (2603:10b6:510:e::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7939.16 via Frontend Transport; Fri, 6 Sep 2024 00:40:51 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.118.233) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.118.233 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.118.233; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.118.233) by SN1PEPF0002529D.mail.protection.outlook.com (10.167.242.4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7918.13 via Frontend Transport; Fri, 6 Sep 2024 00:40:50 +0000 Received: from drhqmail201.nvidia.com (10.126.190.180) by mail.nvidia.com (10.127.129.6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Thu, 5 Sep 2024 17:40:44 -0700 Received: from drhqmail201.nvidia.com (10.126.190.180) by drhqmail201.nvidia.com (10.126.190.180) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Thu, 5 Sep 2024 17:40:44 -0700 Received: from vdi.nvidia.com (10.127.8.12) by mail.nvidia.com (10.126.190.180) with Microsoft SMTP Server id 15.2.1544.4 via Frontend Transport; Thu, 5 Sep 2024 17:40:43 -0700 From: William Tu <witu@nvidia.com> To: <kernel-team@lists.ubuntu.com> Subject: [SRU][J:linux-bluefield][PATCH v2 1/7] UBUNTU: SAUCE: dma-buf: Add dma_buf_try_get() Date: Fri, 6 Sep 2024 00:40:32 +0000 Message-ID: <20240906004038.800613-2-witu@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240906004038.800613-1-witu@nvidia.com> References: <20240906004038.800613-1-witu@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002529D:EE_|CH3PR12MB8481:EE_ X-MS-Office365-Filtering-Correlation-Id: 674798a7-11b0-4fa0-abf7-08dcce0c8ed5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|36860700013|1800799024|82310400026|376014; X-Microsoft-Antispam-Message-Info: fpzpc4eDSQxJCxB5IG3R1IrpL0ay+8NcL/jPPH499VNiKqMB3v513TxG+SjuOnC7auMiFgHlsIsKb5o5zCN//I71ys9iwMizQFlOOxGHERDxJEXpRXt0guK+gaL5LAlGjoWabI4pZiF+hHf4pgAUFVUnBcrDeqij9EDt74lfOGlv2R7R55ZnWkK/XqZfJLpC8Ci3MGPw6D2+R2/s5nIE6SDNRBhS9cNz2wMzp6brfh5NMUsT8V6WCoyvz2YBDKsOOQDMmCal/YwS76pNEXd9vvr8M0/WVvge7TkdOnRPSlOpFC36dM0kkC9SgXwkpsFZociGQ9eIXXZBfmeeGnSMY/QOjGBs+2+7OznWu5+G6SlEMSeqlXclyRO129Xr48hLwDqdTEAiaq+vQQzYn7TSDtP8sIoGCZD8QeO3Jj1RO8Lxz5BwGC3zT+Ba6avA/Bg8EFOpN36jFJ+KF4Sq9nbrntPctz7IgTt46mX/0LNLD9fq4Z7TbVjRWjny1FjyYDh5UTmrCmEDhLMskLvYFZShXK0+tOzrI5dR0fjfsF3zFyMi3MB70gS7F8IaEX/jP8BgkqE8hKVy6l0Uol/oFwugRf9UyzrPSQwWj+2wQPZ3pSyj6xR+a75+8R+0X2UgLbxn2brxqezeRcZP8T3BamK9/9DHUDtjaR5puba4nDLvVrjbHXtjAjyI0jjBTt+yCCUxhk4725wGfZFmtpfxS4SccjnoBIe44nxumUyj/Qiw1F/LIqyqq0TwrygYRO9yQ3fKO1/v9CBwzsEAjE2Esv6pW2cWq/jzXZAGl3s/PUyWbxzRWFXPhcjZ+WbWt3fcXU6YwA8zNJB3SyxNhE9GgJo9ubhB1/ZwIQUxxKj7iIAswwPJkDWILUcjDQoAv1rWNS/VpmxM/q2YyVr58uQMsrMgGrEEyflxLmzB60YK9hQKZw19kCg7arIGjt69D3c+cRZyMhKtrjJRsBQTP/NVOyVhhrb7tZgTwX8DmRZZSS+ZVDNgg7RIaT0Jx6bO1Bo6Hcn2iMD4axVF6VKAHFWpQLxg3YdJSLBmObAIFY+IGDQfLaJr5gwSvUBGvdxfHaqKaRLspt6tQIBGvh/9I5s1X69WdOEstqt77hCeFwlgD0/MgGeHPHFqU8HIvffuCB5qcv5O3HHyESlVJ9g2HJTuaHYwJttv83W2/mfP1k9l5gIlcUHwfZ5FnacYp9kIMWa4O1sl2Gapu5FkK971x4UcILeHrprOchh8R2pbb58Le3i9wKvpiklIHYGmRrwjb74gUiaglQ2WxaMWI7pWspmmaqbNds6YeQSoc/66MkY3ms7hwYYilbuEYbBuS5EbBjjOBJJBfrIAoPbcu/NxunJd++e63NjFhdD90nruCeuRLBFBSoh2Bra1eWwY5An0ZUbYJcvwdraPVRBuqHVx2e8GDMxlKbW06vv2m9erJWCRbEu00lhbyKHaJknpduosFpoQvkQu X-Forefront-Antispam-Report: CIP:216.228.118.233; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge2.nvidia.com; CAT:NONE; SFS:(13230040)(36860700013)(1800799024)(82310400026)(376014); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Sep 2024 00:40:50.9658 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 674798a7-11b0-4fa0-abf7-08dcce0c8ed5 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.233]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002529D.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8481 Received-SPF: softfail client-ip=40.107.237.45; envelope-from=witu@nvidia.com; helo=NAM12-BN8-obe.outbound.protection.outlook.com X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions <kernel-team.lists.ubuntu.com> List-Unsubscribe: <https://lists.ubuntu.com/mailman/options/kernel-team>, <mailto:kernel-team-request@lists.ubuntu.com?subject=unsubscribe> List-Archive: <https://lists.ubuntu.com/archives/kernel-team> List-Post: <mailto:kernel-team@lists.ubuntu.com> List-Help: <mailto:kernel-team-request@lists.ubuntu.com?subject=help> List-Subscribe: <https://lists.ubuntu.com/mailman/listinfo/kernel-team>, <mailto:kernel-team-request@lists.ubuntu.com?subject=subscribe> Cc: vlad@nvidia.com, bodong@nvidia.com, sergeygo@nvidia.com, jgg@nvidia.com, zwaksman@nvidia.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" <kernel-team-bounces@lists.ubuntu.com> |
Series |
Add VFIO P2P support
|
expand
|
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index 3ad636a13b8e..68a4326833d6 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -609,6 +609,19 @@ int dma_buf_fd(struct dma_buf *dmabuf, int flags); struct dma_buf *dma_buf_get(int fd); void dma_buf_put(struct dma_buf *dmabuf); +/** + * dma_buf_try_get - try to get a reference on a dmabuf + * @dmabuf - the dmabuf to get + * + * Returns true if a reference was successfully obtained. The caller must + * interlock with the dmabuf's release function in some way, such as RCU, to + * ensure that this is not called on freed memory. + */ +static inline bool dma_buf_try_get(struct dma_buf *dmabuf) +{ + return get_file_rcu(dmabuf->file); +} + struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *, enum dma_data_direction); void dma_buf_unmap_attachment(struct dma_buf_attachment *, struct sg_table *,