Writing Drivers for NetBSD - of index.html

A RF.C 70
i = (rf_sc->sc_state & RFS_DENS) == 0
? RX2_BYTE_SD : RX2_BYTE_DD;
disk_unbusy(&rf_sc->sc_disk, i, 1);
bus_dmamap_unload(rfc_sc->sc_dmat, rfc_sc->sc_dmam);
/* check for errors */
if ((bus_space_read_2(rfc_sc->sc_iot, rfc_sc->sc_ioh,
RX2CS) & RX2CS_ERR) != 0) {
/* should do more verbose error reporting */
printf("rfc_intr: Error while DMA: %x\n",
bus_space_read_2(rfc_sc->sc_iot,
rfc_sc->sc_ioh, RX2ES));
rfc_sc->sc_curbuf->b_flags |= B_ERROR;
break;
}
if (rfc_sc->sc_bytesleft > i) {
rfc_sc->sc_bytesleft -= i;
rfc_sc->sc_bufidx += i;
} else {
biodone(rfc_sc->sc_curbuf);
rf_sc = get_new_buf( rfc_sc);
if (rf_sc == NULL)
return;
}
RFS_SETCMD(rf_sc->sc_state,
(rfc_sc->sc_curbuf->b_flags & B_READ) != 0
? RFS_RSEC : RFS_FBUF);
break;
case RFS_NOTINIT: /* Device is not open */
case RFS_SMD: /* Set Media Density */
case RFS_RSTAT: /* Read Status */
case RFS_WDDS: /* Write Deleted Data Sector */
case RFS_REC: /* Read Error Code */
default:
panic("Impossible state in rfc_intr(1).\n");
}
if ((rfc_sc->sc_curbuf->b_flags & B_ERROR) != 0) {
/*
* An error occured while processing this buffer.
* Finish it and try to get a new buffer to process.