Author: yongari
Date: Mon Jul 22 05:45:54 2013
New Revision: 253540
URL: http://svnweb.freebsd.org/changeset/base/253540
Log:
5725 family of devices corrupts TSO packets when TSO DMA buffers
cross into regions which are within MSS bytes of a 4GB boundary.
If we encounter the condition, drop the packet.
Reviewed by: Geans Pin geanspin@Broacom
Modified:
head/sys/dev/bge/if_bge.c
Modified: head/sys/dev/bge/if_bge.c
==============================================================================
--- head/sys/dev/bge/if_bge.c Mon Jul 22 03:55:15 2013 (r253539)
+++ head/sys/dev/bge/if_bge.c Mon Jul 22 05:45:54 2013 (r253540)
@@ -5257,17 +5257,51 @@ bge_encap(struct bge_softc *sc, struct m
csum_flags |= BGE_TXBDFLAG_VLAN_TAG;
vlan_tag = m->m_pkthdr.ether_vtag;
}
- for (i = 0; ; i++) {
- d = &sc->bge_ldata.bge_tx_ring[idx];
- d->bge_addr.bge_addr_lo = BGE_ADDR_LO(segs[i].ds_addr);
- d->bge_addr.bge_addr_hi = BGE_ADDR_HI(segs[i].ds_addr);
- d->bge_len = segs[i].ds_len;
- d->bge_flags = csum_flags;
- d->bge_vlan_tag = vlan_tag;
- d->bge_mss = mss;
- if (i == nsegs - 1)
- break;
- BGE_INC(idx, BGE_TX_RING_CNT);
+
+ if (sc->bge_asicrev == BGE_ASICREV_BCM5762 &&
+ (m->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
+ /*
+ * 5725 family of devices corrupts TSO packets when TSO DMA
+ * buffers cross into regions which are within MSS bytes of
+ * a 4GB boundary. If we encounter the condition, drop the
+ * packet.
+ */
+ for (i = 0; ; i++) {
+ d = &sc->bge_ldata.bge_tx_ring[idx];
+ d->bge_addr.bge_addr_lo = BGE_ADDR_LO(segs[i].ds_addr);
+ d->bge_addr.bge_addr_hi = BGE_ADDR_HI(segs[i].ds_addr);
+ d->bge_len = segs[i].ds_len;
+ if (d->bge_addr.bge_addr_lo + segs[i].ds_len + mss <
+ d->bge_addr.bge_addr_lo)
+ break;
+ d->bge_flags = csum_flags;
+ d->bge_vlan_tag = vlan_tag;
+ d->bge_mss = mss;
+ if (i == nsegs - 1)
+ break;
+ BGE_INC(idx, BGE_TX_RING_CNT);
+ }
+ if (i != nsegs - 1) {
+ bus_dmamap_sync(sc->bge_cdata.bge_tx_mtag, map,
+ BUS_DMASYNC_POSTWRITE);
+ bus_dmamap_unload(sc->bge_cdata.bge_tx_mtag, map);
+ m_freem(*m_head);
+ *m_head = NULL;
+ return (EIO);
+ }
+ } else {
+ for (i = 0; ; i++) {
+ d = &sc->bge_ldata.bge_tx_ring[idx];
+ d->bge_addr.bge_addr_lo = BGE_ADDR_LO(segs[i].ds_addr);
+ d->bge_addr.bge_addr_hi = BGE_ADDR_HI(segs[i].ds_addr);
+ d->bge_len = segs[i].ds_len;
+ d->bge_flags = csum_flags;
+ d->bge_vlan_tag = vlan_tag;
+ d->bge_mss = mss;
+ if (i == nsegs - 1)
+ break;
+ BGE_INC(idx, BGE_TX_RING_CNT);
+ }
}
/* Mark the last segment as end of packet... */
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