| UID | tech.root | title | ms.date | targetos | description | prerelease | req.construct-type | req.ddi-compliance | req.dll | req.header | req.include-header | req.kmdf-ver | req.lib | req.max-support | req.redist | req.target-min-winverclnt | req.target-min-winversvr | req.target-type | req.typenames | req.umdf-ver | req.unicode-ansi | topic_type | api_type | api_location | api_name | f1_keywords | dev_langs | helpviewer_keywords | ||||||||||||||
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NS:wdm._PCI_VIRTUALIZATION_INTERFACE |
pci |
PCI_VIRTUALIZATION_INTERFACE |
01/06/2023 |
Windows |
Learn more about the PCI_VIRTUALIZATION_INTERFACE structure. |
false |
structure |
wdm.h |
Wdm.h |
Windows Server 2012 |
PCI_VIRTUALIZATION_INTERFACE, *PPCI_VIRTUALIZATION_INTERFACE |
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The PCI_VIRTUALIZATION_INTERFACE structure enables drivers to manage and configure the PCI Express (PCIe) configuration space for a virtual function (VF). VFs are exposed on the PCI bus by devices that support the single root I/O virtualization (SR-IOV) interface.
This structure describes the GUID_PCI_VIRTUALIZATION_INTERFACE interface.
The size, in bytes, of this structure.
The driver-defined interface version.
A pointer to interface-specific context information.
A pointer to an InterfaceReference routine that increments the interface's reference count.
A pointer to an InterfaceDereference routine that decrements the interface's reference count.
A pointer to a SetVirtualFunctionData routine that writes data to the PCIe configuration space of an SR-IOV device's VF.
A pointer to a GetVirtualFunctionData routine that reads data from the PCIe configuration space of an SR-IOV device's VF.
A pointer to a GetLocation routine that provides information about the current device location of a VF in the PCIe hierarchy. This information is necessary for a virtualization system that is using an I/O memory management unit (IOMMU) to route traffic to or from the device.
A pointer to a GetResources routine that provides information about the resources that are available for virtualization on an SR-IOV device.
A pointer to an EnableVirtualization routine that enables or disables virtualization on an SR-IOV device.
A pointer to a GetVirtualFunctionProbedBars routine that allows a non-privileged Hyper-V virtual machine (VM) to determine what would be read from the PCIe Base Address Registers (BARs) of a VF after a query by the PCI bus driver. The PCI driver performs this query to determine the memory or I/O address space that the device requires.
For devices that support the SR-IOV interface, drivers occasionally have to access and manage the PCIe configuration space of the device's VFs. Drivers call routines from the GUID_PCI_VIRTUALIZATION_INTERFACE interface to access the PCIe configuration space of the VFs on the device.
Since a device's VFs do not appear as complete PCIe devices on the PCI bus, the GUID_BUS_INTERFACE_STANDARD interface cannot be used for the management of a VF.
The PCI_VIRTUALIZATION_INTERFACE structure is an extension of the INTERFACE structure.
A driver obtains a pointer to the PCI_VIRTUALIZATION_INTERFACE structure by sending an IRP_MN_QUERY_INTERFACE I/O request packet (IRP) to its bus driver with InterfaceType set to GUID_PCI_VIRTUALIZATION_INTERFACE.