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Thu, 4 Jun 2026 04:43:57 -0700 From: Zhi Wang To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , Zhi Wang , Bjorn Helgaas , Subject: [PATCH 1/9] rust: pci: expose sriov_get_totalvfs() helper Date: Thu, 4 Jun 2026 14:43:31 +0300 Message-ID: <20260604114339.1565660-2-zhiw@nvidia.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260604114339.1565660-1-zhiw@nvidia.com> References: <20260604114339.1565660-1-zhiw@nvidia.com> Precedence: bulk X-Mailing-List: nova-gpu@lists.linux.dev 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: SJ1PEPF000023D3:EE_|PH7PR12MB7913:EE_ X-MS-Office365-Filtering-Correlation-Id: 0b43f63d-e523-4ef2-c4f4-08dec22e9dd6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700016|7416014|1800799024|82310400026|22082099003|18002099003|11063799006|6133799003|56012099006; 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Cc: Bjorn Helgaas Cc: linux-pci@vger.kernel.org Signed-off-by: Zhi Wang --- rust/kernel/pci.rs | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs index 5071cae6543f..d04e5f6841f2 100644 --- a/rust/kernel/pci.rs +++ b/rust/kernel/pci.rs @@ -450,6 +450,18 @@ pub fn pci_class(&self) -> Class { // SAFETY: `self.as_raw` is a valid pointer to a `struct pci_dev`. Class::from_raw(unsafe { (*self.as_raw()).class }) } + + /// Returns total number of VFs, or `Err(ENODEV)` if none available. + pub fn sriov_get_totalvfs(&self) -> Result { + // SAFETY: `self.as_raw()` is a valid pointer to a `struct pci_dev`. + let vfs = unsafe { bindings::pci_sriov_get_totalvfs(self.as_raw()) }; + + if vfs == 0 { + return Err(ENODEV); + } + + Ok(vfs) + } } impl<'a> Device> { -- 2.51.0