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Wed, 30 Sep 2026 03:58:23 -0700 Received: from inno-dell.home (10.127.8.11) by mail.nvidia.com (10.129.68.6) with Microsoft SMTP Server id 15.2.2562.49 via Frontend Transport; Wed, 30 Sep 2026 03:58:13 -0700 From: Zhi Wang To: , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , Zhi Wang , Boqun Feng , Daniel Almeida , Tamir Duberstein , =?UTF-8?q?Onur=20=C3=96zkan?= , Jason Gunthorpe , Bjorn Helgaas , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , , Peter Colberg , "Simon Song" Subject: [PATCH 2/7] rust: pci: expose the VF index within its PF Date: Wed, 30 Sep 2026 13:57:44 +0300 Message-ID: <5828df56a42b784ce9da005b338e8580ea63294c.1790764573.git.zhiw@nvidia.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000397B5:EE_|MN0PR12MB6004:EE_ X-MS-Office365-Filtering-Correlation-Id: 33f5eb38-d70b-464d-47dc-08df1ee1cd4a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|36860700016|1800799024|82310400026|376014|7416014|10067099003|56012099006|6133799003|11063799006|18002099003|22082099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: xDTJ/ATMuUzOJoaGBxlhp0E7CZpPuqoVTnWgOEJe4scibdNRQ5oNmnqF7hMybOdKUHHDyYeBWJ9EmWd/jqEGa/vH3w4Wp1PwkWAv0RbA7EkJZjC8XSAihI7xA3Unnu0xD9Ra4SJiyFPB9zExBJKHrAd3VF8LaaHmwKYNdoMzvoDN0RU205HMNE5fD4ErZc0fBBQTZLVPIj4Xl5MV9CF5hln260QT+nQWYNz3GcWQLJ6p503Ew7JTNQ93JLNR+Hu8/evvjhqN/783mCqoc/lxUzkgnfD6FjnWQGTQHqk2WhN2eOTTQtt+GCfBuEvt8feCCmQQO6jUpHbQXAvg50D8nECplShgBMnbpLI6MC6lwcRQNPMl2pwgfdExHLEpy5jc0CeJ1SsBWHFjPL8Qs3arCgfq+kSNKUFoLmTCRvNjz+5+HiPYiAHR/3bOxMYZr1tD X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Sep 2026 10:58:46.9473 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 33f5eb38-d70b-464d-47dc-08df1ee1cd4a X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000397B5.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB6004 From: Danilo Krummrich Nova identifies a vGPU instance by the VF's index within its PF. Expose pci_iov_vf_id() through Device::vf_id() so a Rust VF driver can obtain that index, with an error for devices that are not VFs. Signed-off-by: Danilo Krummrich Signed-off-by: Zhi Wang --- rust/kernel/pci/iov.rs | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/rust/kernel/pci/iov.rs b/rust/kernel/pci/iov.rs index 9d9bd3ac7025..fac134d1ebab 100644 --- a/rust/kernel/pci/iov.rs +++ b/rust/kernel/pci/iov.rs @@ -40,6 +40,14 @@ pub fn is_virtfn(&self) -> bool { // SAFETY: `self.as_raw` is a valid pointer to a `struct pci_dev`. unsafe { (*self.as_raw()).is_virtfn() != 0 } } + + /// Return the zero-based VF index within its PF, or an error for a non-VF device. + pub fn vf_id(&self) -> Result { + // SAFETY: `self.as_raw()` points to a live PCI device; the helper checks VF membership. + let id = unsafe { bindings::pci_iov_vf_id(self.as_raw()) }; + to_result(id)?; + Ok(id as u32) + } } impl Device> { -- 2.53.0