20.3.2 Driver Binding Protocol Start() and Stop()
The Start()
service of the Driver Binding Protocol for a SCSI device driver
or host controller driver opens the SCSI I/O Protocol with an attribute of
EFI_OPEN_PROTOCOL_BY_DRIVER.
The service then installs the I/O abstraction
protocol for the SCSI device onto the handle on which the
EFI_SCSI_IO_PROTOCOL
is installed.