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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
This commit is contained in:
parent
2018efd098
commit
b77d3a3b8e
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=253540
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@ -5257,6 +5257,39 @@ bge_encap(struct bge_softc *sc, struct mbuf **m_head, uint32_t *txidx)
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csum_flags |= BGE_TXBDFLAG_VLAN_TAG;
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vlan_tag = m->m_pkthdr.ether_vtag;
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}
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if (sc->bge_asicrev == BGE_ASICREV_BCM5762 &&
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(m->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
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/*
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* 5725 family of devices corrupts TSO packets when TSO DMA
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* buffers cross into regions which are within MSS bytes of
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* a 4GB boundary. If we encounter the condition, drop the
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* packet.
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*/
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for (i = 0; ; i++) {
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d = &sc->bge_ldata.bge_tx_ring[idx];
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d->bge_addr.bge_addr_lo = BGE_ADDR_LO(segs[i].ds_addr);
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d->bge_addr.bge_addr_hi = BGE_ADDR_HI(segs[i].ds_addr);
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d->bge_len = segs[i].ds_len;
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if (d->bge_addr.bge_addr_lo + segs[i].ds_len + mss <
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d->bge_addr.bge_addr_lo)
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break;
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d->bge_flags = csum_flags;
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d->bge_vlan_tag = vlan_tag;
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d->bge_mss = mss;
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if (i == nsegs - 1)
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break;
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BGE_INC(idx, BGE_TX_RING_CNT);
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}
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if (i != nsegs - 1) {
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bus_dmamap_sync(sc->bge_cdata.bge_tx_mtag, map,
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BUS_DMASYNC_POSTWRITE);
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bus_dmamap_unload(sc->bge_cdata.bge_tx_mtag, map);
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m_freem(*m_head);
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*m_head = NULL;
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return (EIO);
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}
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} else {
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for (i = 0; ; i++) {
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d = &sc->bge_ldata.bge_tx_ring[idx];
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d->bge_addr.bge_addr_lo = BGE_ADDR_LO(segs[i].ds_addr);
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@ -5269,6 +5302,7 @@ bge_encap(struct bge_softc *sc, struct mbuf **m_head, uint32_t *txidx)
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break;
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BGE_INC(idx, BGE_TX_RING_CNT);
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}
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}
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/* Mark the last segment as end of packet... */
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d->bge_flags |= BGE_TXBDFLAG_END;
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