enic: verify firmware supports V2 SR-IOV at probe time

During PF probe, query the firmware get-supported-feature interface
to verify that the running firmware supports V2 SR-IOV. Firmware
version 5.3(4.72) and later report VIC_FEATURE_SRIOV via
CMD_GET_SUPP_FEATURE_VER. If the firmware does not support the
feature, set vf_type to ENIC_VF_TYPE_NONE and log a warning so the
admin knows a firmware upgrade is needed.

The V2 admin-channel and MBOX bring-up added later in this series is
gated on ENIC_VF_TYPE_V2, so this downgrade keeps those paths from
running on firmware that does not support V2 SR-IOV.

VIC_FEATURE_SRIOV is assigned the explicit value 4 to match the
firmware ABI.  Slot 3 (firmware's VIC_FEATURE_PTP) is reserved with
a comment rather than a placeholder enum entry, since PTP is not
used by the upstream driver.

Suggested-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Satish Kharat <satishkh@cisco.com>
Reviewed-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260812-enic-sriov-v2-admin-channel-v2-v13-1-b3809e448aba@cisco.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions