NdisReadPciSlotInformation

This function returns bus-specific PCI configuration information from the PCI configuration space for a device at a particular socket on the bus.

ULONG NdisReadPciSlotInformation(
IN NDIS_HANDLE NdisAdapterHandle, 
IN ULONG SlotNumber, 
IN ULONG Offset, 
IN PVOID Buffer, 
IN ULONG Length );

Parameters

• NdisAdapterHandle
  Specifies the MiniportAdapterHandle passed in to the MiniportInitialize function and to most other MiniportXXX functions.
• SlotNumber
  Specifies the slot number of an NIC on the I/O bus.
• Offset
  Specifies the byte offset within the PCI configuration space at which to begin transferring the configuration information.
• Buffer
  Points to a caller-allocated buffer in which to return the requested configuration information.
• Length
  Specifies the size, in bytes, of the buffer at Buffer and, therefore, how many bytes of configuration information to return.

Return Values

Returns how many bytes of configuration information it returned at Buffer.

Remarks

This function helps a driver find an NIC that it supports on a PCI bus. When it does, the driver can call the NdisMPciAssignResources function to determine the bus-relative configuration parameters that it can use in subsequent calls to other NDIS configuration functions, such as NdisMRegisterInterrupt, NdisMMapIoSpace, and NdisMRegisterIoPortRange.

This function returns the same bus-relative PCI configuration information as NdisImmediateReadPciSlotInformation. However, callers of this function pass the MiniportAdapterHandle passed to the MiniportInitialize function, rather than the WrapperConfigurationContext handle.

The caller is responsible for releasing the memory at Buffer when the driver has consumed the configuration information with NdisFreeMemory.

Miniport drivers call this function from their MiniportInitialize functions.

A driver that calls this function can run at IRQL <= DISPATCH_LEVEL. Usually, callers are running at IRQL PASSIVE_LEVEL.

Requirements

Note   This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.

See Also

NdisFreeMemory, NdisMMapIoSpace, NdisMPciAssignResources, NdisMRegisterInterrupt, NdisMRegisterIoPortRange, NdisMSetAttributes, NdisMSetAttributesEx, NdisOpenConfiguration

 Last updated on Tuesday, July 13, 2004

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