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It seems that we don't need to reserve a TBD to set total TCP

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payload length in TSO case. Leaving unused TBD also seem to cause
SCB timeouts under certain conditions when TSO/non-TSO traffics
are active at the same time.
This commit is contained in:
Pyun YongHyeon 2008-12-18 01:36:46 +00:00
parent a6c8d9978a
commit 68f4ab9aa3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=186262
1 changed files with 4 additions and 4 deletions
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8
sys/dev/fxp/if_fxp.c
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@ -1540,8 +1540,8 @@ fxp_encap(struct fxp_softc *sc, struct mbuf **m_head)
* the chip is an 82550/82551 or not.
*/
if (sc->flags & FXP_FLAG_EXT_RFA) {
cbp->tbd[i + 2].tb_addr = htole32(segs[i].ds_addr);
cbp->tbd[i + 2].tb_size = htole32(segs[i].ds_len);
cbp->tbd[i + 1].tb_addr = htole32(segs[i].ds_addr);
cbp->tbd[i + 1].tb_size = htole32(segs[i].ds_len);
} else {
cbp->tbd[i].tb_addr = htole32(segs[i].ds_addr);
cbp->tbd[i].tb_size = htole32(segs[i].ds_len);
@ -1550,13 +1550,13 @@ fxp_encap(struct fxp_softc *sc, struct mbuf **m_head)
if (sc->flags & FXP_FLAG_EXT_RFA) {
/* Configure dynamic TBD for 82550/82551. */
cbp->tbd_number = 0xFF;
cbp->tbd[nseg + 1].tb_size |= htole32(0x8000);
cbp->tbd[nseg].tb_size |= htole32(0x8000);
} else
cbp->tbd_number = nseg;
/* Configure TSO. */
if (m->m_pkthdr.csum_flags & CSUM_TSO) {
cbp->tbd[-1].tb_size = htole32(m->m_pkthdr.tso_segsz << 16);
cbp->tbd[1].tb_size = htole32(tcp_payload << 16);
cbp->tbd[1].tb_size |= htole32(tcp_payload << 16);
cbp->ipcb_ip_schedule |= FXP_IPCB_LARGESEND_ENABLE |
FXP_IPCB_IP_CHECKSUM_ENABLE |
FXP_IPCB_TCP_PACKET |