Intel Extensible Firmware Interface - Manual (Page 627)

Protocols — Network Support
Version 1.10 12/01/02 15-21
Description
This function gets the current interrupt and recycled transmit buffer status from the network
interface. The interrupt status is returned as a bit mask in
InterruptStatus . If
InterruptStatus is NULL , the interrupt status will not be read. If TxBuf is not NULL , a
recycled transmit buffer address will be retrieved. If a recycled transmit buffer address is returned
in
TxBuf , then the buffer has been successfully transmitted, and the status for that buffer is
cleared. If the status of the network interface is successfully collected, EFI_SUCCESS will be
returned. If the driver has not been initialized, EFI_DEVICE_ERROR will be returned.
Status Codes Returned
EFI_SUCCESS The status of the network interface was retrieved.
EFI_NOT_STARTED The network interface has not been started.
EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
EFI_DEVICE_ERROR The command could not be sent to the network interface.
EFI_UNSUPPORTED This function is not supported by the network interface.