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Mon, 22 Jun 2026 12:44:42 -0700 From: Zhi Wang To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , Zhi Wang , Bjorn Helgaas , Subject: [PATCH v2 2/7] rust: pci: Add sriov_get_totalvfs() helper Date: Mon, 22 Jun 2026 22:43:48 +0300 Message-ID: <20260622194353.1308872-3-zhiw@nvidia.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260622194353.1308872-1-zhiw@nvidia.com> References: <20260622194353.1308872-1-zhiw@nvidia.com> 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: BL02EPF0002992E:EE_|CH8PR12MB9839:EE_ X-MS-Office365-Filtering-Correlation-Id: a54aad99-2f58-4d8f-6187-08ded096c770 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|23010399003|36860700016|7416014|376014|82310400026|18002099003|22082099003|11063799006|56012099006|6133799003; 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The C helper now returns u16 and reports 0 when SR-IOV is unavailable or the device is not a PF, so mirror that API directly instead of modeling 0 VFs as an error. Cc: Bjorn Helgaas Cc: linux-pci@vger.kernel.org Signed-off-by: Zhi Wang --- rust/kernel/pci.rs | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs index 5071cae6543f..adcb99fd0a2e 100644 --- a/rust/kernel/pci.rs +++ b/rust/kernel/pci.rs @@ -450,6 +450,12 @@ 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 the total number of VFs, or 0 if SR-IOV is not available. + pub fn sriov_get_totalvfs(&self) -> u16 { + // SAFETY: `self.as_raw()` is a valid pointer to a `struct pci_dev`. + unsafe { bindings::pci_sriov_get_totalvfs(self.as_raw()) } + } } impl<'a> Device> { -- 2.51.0