Author: yongari
Date: Tue Nov 10 20:29:20 2009
New Revision: 199153
URL: http://svn.freebsd.org/changeset/base/199153
Log:
Controller does not update Tx descriptors(send BDs) after sending
frames so remove unnecessary BUS_DMASYNC_PREREAD and
BUS_DMASYNC_POSTREAD of bus_dmamap_sync(9).
Modified:
head/sys/dev/bge/if_bge.c
Modified: head/sys/dev/bge/if_bge.c
==============================================================================
--- head/sys/dev/bge/if_bge.c Tue Nov 10 19:50:28 2009 (r199152)
+++ head/sys/dev/bge/if_bge.c Tue Nov 10 20:29:20 2009 (r199153)
@@ -1165,8 +1165,7 @@ bge_init_tx_ring(struct bge_softc *sc)
bzero(sc->bge_ldata.bge_tx_ring, BGE_TX_RING_SZ);
bus_dmamap_sync(sc->bge_cdata.bge_tx_ring_tag,
- sc->bge_cdata.bge_tx_ring_map,
- BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ sc->bge_cdata.bge_tx_ring_map, BUS_DMASYNC_PREWRITE);
/* Initialize transmit producer index for host-memory send ring. */
sc->bge_tx_prodidx = 0;
@@ -3323,8 +3322,7 @@ bge_txeof(struct bge_softc *sc)
ifp = sc->bge_ifp;
bus_dmamap_sync(sc->bge_cdata.bge_tx_ring_tag,
- sc->bge_cdata.bge_tx_ring_map,
- BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+ sc->bge_cdata.bge_tx_ring_map, BUS_DMASYNC_POSTWRITE);
/*
* Go through our tx ring and free mbufs for those
* frames that have been sent.
@@ -3834,8 +3832,7 @@ bge_start_locked(struct ifnet *ifp)
return;
bus_dmamap_sync(sc->bge_cdata.bge_tx_ring_tag,
- sc->bge_cdata.bge_tx_ring_map,
- BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ sc->bge_cdata.bge_tx_ring_map, BUS_DMASYNC_PREWRITE);
/* Transmit. */
bge_writembx(sc, BGE_MBX_TX_HOST_PROD0_LO, prodidx);
/* 5700 b2 errata */
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