OID_SRIOV_RESET_VF
Overlying drivers issue an object identifier (OID) set request of OID_SRIOV_RESET_VF to reset a specified PCI Express (PCIe) Virtual Function (VF) on a network adapter that supports single root I/O virtualization. Overlying drivers issue this OID set request to the miniport driver of the PCI Express (PCIe) Physical Function (PF) of the network adapter.
The InformationBuffer member of the NDIS_OID_REQUEST structure contains a pointer to an NDIS_SRIOV_RESET_VF_PARAMETERS structure. The overlying driver specifies the identifier of the VF to be reset through the VFId member of this structure.
Remarks
A VF can be reset through a PCI Express (PCIe) Function Level Reset (FLR). Because the FLR request is a privileged operation, it can only be performed by the PF miniport driver that runs in the management operating system of a Hyper-V parent partition. Overlying drivers that run in the management operating system are notified of the FLR request and issue the OID set request of OID_SRIOV_RESET_VF to the PF miniport driver.
When it handles this OID request, the PF miniport driver must follow these guidelines:
The PF miniport driver must verify that the VF, specified by the VFId member of the NDIS_SRIOV_RESET_VF_PARAMETERS structure, has resources that have been previously allocated. The PF miniport driver allocates resources for a VF during an OID method request of OID_NIC_SWITCH_ALLOCATE_VF. If resources for the specified VF have not been allocated, the driver must fail the OID request.
The reset operation must only affect the specified VF. The operation must not affect other VFs or the PF on the same network adapter.
For more information, see Resetting a Virtual Function.
Return Status Codes
The PF miniport driver returns one of the following status codes for the set request of OID_SRIOV_RESET_VF.
| Status Code | Description |
|---|---|
NDIS_STATUS_SUCCESS |
The OID request completed successfully. |
NDIS_STATUS_NOT_SUPPORTED |
The PF miniport driver either does not support the single root I/O virtualization (SR-IOV) interface or is not enabled to use the interface. |
NDIS_STATUS_INVALID_PARAMETER |
One or more of the members of the NDIS_SRIOV_RESET_VF_PARAMETERS structure have invalid values. |
NDIS_STATUS_INVALID_LENGTH |
The information buffer was too short. The PF miniport driver must set the DATA.SET_INFORMATION.BytesNeeded member in the NDIS_OID_REQUEST structure to the minimum buffer size that is required. |
NDIS_STATUS_FAILURE |
The request failed for other reasons. |
Requirements
Version |
Supported in NDIS 6.30 and later. |
Header |
Ntddndis.h (include Ndis.h) |