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Do bus_dmamap_sync call only if frame size is greater than

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standard buffer size. If controller is not capable of handling
jumbo frame, interface MTU couldn't be larger than standard MTU
which in turn the received should be fit in standard buffer. This
fixes bus_dmamap_sync call for jumbo ring is called even if
interface is configured to use standard MTU.
Also if total frame size could be fit into standard buffer don't
use jumbo buffers.
This commit is contained in:
Pyun YongHyeon 2009-11-06 23:49:20 +00:00
parent a669a81f0b
commit c215fd771d
1 changed files with 5 additions and 3 deletions
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8
sys/dev/bge/if_bge.c
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@ -3134,7 +3134,8 @@ bge_rxeof(struct bge_softc *sc)
sc->bge_cdata.bge_rx_return_ring_map, BUS_DMASYNC_POSTREAD);
bus_dmamap_sync(sc->bge_cdata.bge_rx_std_ring_tag,
sc->bge_cdata.bge_rx_std_ring_map, BUS_DMASYNC_POSTWRITE);
if (BGE_IS_JUMBO_CAPABLE(sc))
if (ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + ETHER_VLAN_ENCAP_LEN >
(MCLBYTES - ETHER_ALIGN))
bus_dmamap_sync(sc->bge_cdata.bge_rx_jumbo_ring_tag,
sc->bge_cdata.bge_rx_jumbo_ring_map, BUS_DMASYNC_POSTWRITE);
@ -3266,7 +3267,7 @@ bge_rxeof(struct bge_softc *sc)
bus_dmamap_sync(sc->bge_cdata.bge_rx_std_ring_tag,
sc->bge_cdata.bge_rx_std_ring_map, BUS_DMASYNC_PREWRITE);
if (BGE_IS_JUMBO_CAPABLE(sc) && jumbocnt > 0)
if (jumbocnt > 0)
bus_dmamap_sync(sc->bge_cdata.bge_rx_jumbo_ring_tag,
sc->bge_cdata.bge_rx_jumbo_ring_map, BUS_DMASYNC_PREWRITE);
@ -3920,7 +3921,8 @@ bge_init_locked(struct bge_softc *sc)
}
/* Init jumbo RX ring. */
if (ifp->if_mtu > (ETHERMTU + ETHER_HDR_LEN + ETHER_CRC_LEN)) {
if (ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + ETHER_VLAN_ENCAP_LEN >
(MCLBYTES - ETHER_ALIGN)) {
if (bge_init_rx_ring_jumbo(sc) != 0) {
device_printf(sc->bge_dev, "no memory for std Rx buffers.\n");
bge_stop(sc);