rust: pci: add sriov_get_totalvfs() helper

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Expose pci_sriov_get_totalvfs() to Rust PCI drivers so they can query
how many SR-IOV VFs a device supports.

Use a conditional C helper because the !CONFIG_PCI_IOV version of
pci_sriov_get_totalvfs() is a static inline function and is therefore
not emitted into the Rust bindings. Return Option<NonZero<u16>> so Rust
callers must handle the zero value that represents unavailable SR-IOV.

Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: David Laight <david.laight.linux@gmail.com>
Cc: Gary Guo <gary@garyguo.net>
Cc: linux-pci@vger.kernel.org
Link: https://lore.kernel.org/all/DJHPRE4TGGT8.BUTMYOF5YE05@nvidia.com/
Signed-off-by: Zhi Wang <zhiw@nvidia.com>
Link: https://patch.msgid.link/20260722073913.1807677-3-zhiw@nvidia.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

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Zhi Wang 2026-07-22 10:39:09 +03:00 • committed by Danilo Krummrich

parent 7cffd051ae

commit 6afbbc27f5

2 changed files with 21 additions and 0 deletions

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8

rust/helpers/pci.c

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13

rust/kernel/pci.rs

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