Queuing Other Transmits; Implementing The El_Error Routine - Compaq Tru64 UNIX Installation Manual

Updates the softc data structure with the amount of space that is
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available in the transmit FIFO.

13.3.5 Queuing Other Transmits

The following code shows how the el_tint( ) routine clears the output
active flag to permit other transmits to be queued to the device:
ifp->if_flags &= ~IFF_OACTIVE;
}

13.4 Implementing the el_error Routine

The if_el driver's el_error( ) routine implements the interface adapter
error routine, as follows:
static void el_error(struct el_softc *sc,
{
int i;
WRITE_CMD(sc, CMD_WINDOW4);
i = READ_FDP(sc);
printf("el%d: Adapter Failure - %04X\n", ifp->if_unit, i);
el_reset_locked(sc, ifp, ifp->if_unit);
}
Reads the FIFO diagnostic port register.
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Resets the adapter to clear the failure condition.
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13–12 Implementing the Interrupt Section
struct ifnet *ifp)
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