NDIS_SRIOV_BAR_RESOURCES_INFO structure (ntddndis.h)

Article
05/26/2021

The NDIS_SRIOV_BAR_RESOURCES_INFO structure specifies the PCI Express (PCIe) Base Address Register (BAR) of a network adapter's PCIe Virtual Function (VF).

Syntax

typedef struct _NDIS_SRIOV_BAR_RESOURCES_INFO {
  NDIS_OBJECT_HEADER     Header;
  NDIS_SRIOV_FUNCTION_ID VFId;
  USHORT                 BarIndex;
  ULONG                  BarResourcesOffset;
} NDIS_SRIOV_BAR_RESOURCES_INFO, *PNDIS_SRIOV_BAR_RESOURCES_INFO;

Members

Header

The type, revision, and size of the NDIS_SRIOV_BAR_RESOURCES_INFO structure. This member is formatted as an NDIS_OBJECT_HEADER structure.

The miniport driver must set the Type member of Header to NDIS_OBJECT_TYPE_DEFAULT. To specify the version of the NDIS_SRIOV_BAR_RESOURCES_INFO structure, the driver must set the Revision member of Header to the following value:

NDIS_SRIOV_BAR_RESOURCES_INFO_REVISION_1

Original version for NDIS 6.30 and later.

Set the Size member to NDIS_SIZEOF_SRIOV_BAR_RESOURCES_INFO_REVISION_1.

VFId

An NDIS_SRIOV_FUNCTION_ID value that specifies the unique identifier of the VF on the network adapter.

Note The VF with the specified NDIS_SRIOV_FUNCTION_ID value must have resources that were previously allocated through an OID set request of OID_NIC_SWITCH_ALLOCATE_VF.

BarIndex

A USHORT value that specifies the BAR index on the VF. This value is the offset of the register within the table of BARs in the PCI configuration space.

BarResourcesOffset

A ULONG value that specifies the offset, in units of bytes, from the beginning of this structure to a CM_PARTIAL_RESOURCE_DESCRIPTOR structure.

Remarks

The NDIS_SRIOV_BAR_RESOURCES_INFO structure is used in OID method requests of OID_SRIOV_BAR_RESOURCES.

Requirements

Requirement	Value
Minimum supported client	Supported in NDIS 6.30 and later.
Header	ntddndis.h (include Ndis.h)