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WRITE_CMD(sc, CMD_WINDOW1);
simple_unlock(&sc->el_softc_lock);
splx(s);
break;
default:
break;
}
1 Tests for loss of carrier errors. Most network adapters give carrier
errors if no cable is plugged in or if transceivers are not present.
5.3.14 Determining Whether Packets Were Transmitted Successfully
The following code shows how the el_autosense_thread( ) routine
determines whether packets were successfully transmitted:
if ((prev_err == ifp->if_oerrors) &&
(prev_tmo == sc->xmit_tmo) &&
(wait < 5)) {
1
good_xmits++;
if (sc->debug)
printf("el%d: autosense: %s packet sent OK (%d)\n",
ifp->if_unit, lan_media_strings_10[sc->lm_media],
good_xmits);
} else {
good_xmits = 0;
1 Determines whether traffic went out successfully.
5.3.15 Printing Debug Information
The following code shows how the el_autosense_thread( ) routine prints
debug information:
if (sc->debug) {
1
if (prev_err != ifp->if_oerrors)
printf("el%d: autosense: %s transmit error\n",
ifp->if_unit,
lan_media_strings_10[sc->lm_media]);
if (prev_tmo != sc->xmit_tmo)
printf("el%d: autosense: %s driver transmit timeout\n",
ifp->if_unit,
lan_media_strings_10[sc->lm_media]);
if ((wait >= 5) && (wait < 100))
printf("el%d: autosense: %s transmit timeout\n",
ifp->if_unit,
lan_media_strings_10[sc->lm_media]);
}
1 Prints debugging information (if requested).
5.3.16 Setting Up New Media
The following code shows how the el_autosense_thread( ) routine
selects new media to try if the transmit operation failed:
switch (sc->lm_media) { 1
case LAN_MEDIA_AUI:
5–24 Implementing the Autoconfiguration Support Section (probe)