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net: enetc: add VF support for i.MX94 and i.MX95

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Add VF support for the i.MX94 and i.MX95 platforms. Compared to the
LS1028A ENETC, the VF device ID is updated to 0xef00, so add it to the
VF driver's PCI device ID table. Also add the enetc4 SI ops and VF
driver data, and wire up .sriov_configure for the enetc4 PF driver so
that VFs can be created and torn down on these SoCs.

The number of VFs is not decided by the driver. It is determined by
each ENETC instance's SR-IOV hardware capability, reported through the
PCI SR-IOV TotalVFs field and configured by the SoC integration and
device tree. The driver derives it from pci_sriov_get_totalvfs() in
enetc_init_sriov_resources(); an instance that advertises zero VFs
simply cannot enable SR-IOV. So there is no driver-side revision or
device-ID check bounding the VF count.

For reference, the per-instance VF capability on these SoCs is:
 - i.MX95 (v4.1): each ENETC instance supports 2 VFs.
 - i.MX94 (v4.3) has two kinds of ENETC:
   - standalone ENETC, the same instance type as on i.MX95, but on
     i.MX94 it advertises no VFs;
   - internal ENETC connected to the CPU port of the NETC switch,
     which supports 3 VFs.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20260909100733.1139689-13-wei.fang@oss.nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Wei Fang 2026-09-09 18:07:30 +08:00 • committed by Paolo Abeni
commit fd793705e6
6 changed files with 46 additions and 1 deletions
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