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... */ _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"