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MFC r274967:

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Add busdma sync ops before reading and after modifying the descriptor rings
This commit is contained in:
ian 2014-12-27 04:35:18 +00:00
parent aa8c824e74
commit 2226c9830e
1 changed files with 10 additions and 0 deletions
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10
sys/dev/ffec/if_ffec.c
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@ -653,7 +653,9 @@ ffec_txstart_locked(struct ffec_softc *sc)
}
if (enqueued != 0) {
bus_dmamap_sync(sc->txdesc_tag, sc->txdesc_map, BUS_DMASYNC_PREWRITE);
WR4(sc, FEC_TDAR_REG, FEC_TDAR_TDAR);
bus_dmamap_sync(sc->txdesc_tag, sc->txdesc_map, BUS_DMASYNC_POSTWRITE);
sc->tx_watchdog_count = WATCHDOG_TIMEOUT_SECS;
}
}
@ -678,6 +680,9 @@ ffec_txfinish_locked(struct ffec_softc *sc)
FFEC_ASSERT_LOCKED(sc);
/* XXX Can't set PRE|POST right now, but we need both. */
bus_dmamap_sync(sc->txdesc_tag, sc->txdesc_map, BUS_DMASYNC_PREREAD);
bus_dmamap_sync(sc->txdesc_tag, sc->txdesc_map, BUS_DMASYNC_POSTREAD);
ifp = sc->ifp;
retired_buffer = false;
while (sc->tx_idx_tail != sc->tx_idx_head) {
@ -842,6 +847,9 @@ ffec_rxfinish_locked(struct ffec_softc *sc)
FFEC_ASSERT_LOCKED(sc);
/* XXX Can't set PRE|POST right now, but we need both. */
bus_dmamap_sync(sc->rxdesc_tag, sc->rxdesc_map, BUS_DMASYNC_PREREAD);
bus_dmamap_sync(sc->rxdesc_tag, sc->rxdesc_map, BUS_DMASYNC_POSTREAD);
produced_empty_buffer = false;
for (;;) {
desc = &sc->rxdesc_ring[sc->rx_idx];
@ -889,7 +897,9 @@ ffec_rxfinish_locked(struct ffec_softc *sc)
}
if (produced_empty_buffer) {
bus_dmamap_sync(sc->rxdesc_tag, sc->txdesc_map, BUS_DMASYNC_PREWRITE);
WR4(sc, FEC_RDAR_REG, FEC_RDAR_RDAR);
bus_dmamap_sync(sc->rxdesc_tag, sc->txdesc_map, BUS_DMASYNC_POSTWRITE);
}
}