[PATCH net-next v9 01/10] enic: verify firmware supports V2 SR-IOV at probe time
From: Satish Kharat <satishkh@cisco.com>
Date: 2026-06-18 01:54:03
Also in:
lkml
Subsystem:
cisco vic ethernet nic driver, networking drivers, the rest · Maintainers:
Satish Kharat, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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. 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> --- drivers/net/ethernet/cisco/enic/enic_main.c | 21 ++++++++++++++++++++- drivers/net/ethernet/cisco/enic/vnic_devcmd.h | 2 ++ 2 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index e7125b818087..53d68272d06a 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c@@ -2641,8 +2641,10 @@ static void enic_iounmap(struct enic *enic) static void enic_sriov_detect_vf_type(struct enic *enic) { struct pci_dev *pdev = enic->pdev; - int pos; + u64 supported_versions, a1 = 0; u16 vf_dev_id; + int pos; + int err; if (enic_is_sriov_vf(enic) || enic_is_dynamic(enic)) return;
@@ -2669,6 +2671,23 @@ static void enic_sriov_detect_vf_type(struct enic *enic) enic->vf_type = ENIC_VF_TYPE_NONE; break; } + + if (enic->vf_type != ENIC_VF_TYPE_V2) + return; + + /* A successful command means firmware recognizes + * VIC_FEATURE_SRIOV; supported_versions is available + * for sub-feature versioning in the future. + */ + err = vnic_dev_get_supported_feature_ver(enic->vdev, + VIC_FEATURE_SRIOV, + &supported_versions, + &a1); + if (err) { + dev_warn(&pdev->dev, + "SR-IOV V2 not supported by current firmware. Upgrade to VIC FW 5.3(4.72) or higher.\n"); + enic->vf_type = ENIC_VF_TYPE_NONE; + } } #endif
diff --git a/drivers/net/ethernet/cisco/enic/vnic_devcmd.h b/drivers/net/ethernet/cisco/enic/vnic_devcmd.h
index 605ef17f967e..3b6efa743dba 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_devcmd.h
+++ b/drivers/net/ethernet/cisco/enic/vnic_devcmd.h@@ -734,6 +734,8 @@ enum vic_feature_t { VIC_FEATURE_VXLAN, VIC_FEATURE_RDMA, VIC_FEATURE_VXLAN_PATCH, + /* slot 3 reserved for firmware VIC_FEATURE_PTP */ + VIC_FEATURE_SRIOV = 4, VIC_FEATURE_MAX, };
--
2.43.0