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| author | yongari <yongari@FreeBSD.org> | 2011-11-07 22:11:38 +0000 |
|---|---|---|
| committer | yongari <yongari@FreeBSD.org> | 2011-11-07 22:11:38 +0000 |
| commit | ab2f26b102bec132db8ea050e243e44d069c3509 (patch) | |
| tree | c4c0382b4c6a2e5f49479724af21a320b773df50 /sys/dev/ti | |
| parent | 422432aa2bc78e1119feab8d83ae6987a1ce1f0f (diff) | |
| download | FreeBSD-src-ab2f26b102bec132db8ea050e243e44d069c3509.zip FreeBSD-src-ab2f26b102bec132db8ea050e243e44d069c3509.tar.gz | |
Track which ring was updated in RX handler and update only modified
ring. This should reduce unnecessary register accesses.
Diffstat (limited to 'sys/dev/ti')
| -rw-r--r-- | sys/dev/ti/if_ti.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/sys/dev/ti/if_ti.c b/sys/dev/ti/if_ti.c index f01b638..8ce82ce 100644 --- a/sys/dev/ti/if_ti.c +++ b/sys/dev/ti/if_ti.c @@ -2647,15 +2647,17 @@ ti_rxeof(struct ti_softc *sc) struct ifnet *ifp; bus_dmamap_t map; struct ti_cmd_desc cmd; + int jumbocnt, minicnt, stdcnt; TI_LOCK_ASSERT(sc); ifp = sc->ti_ifp; + jumbocnt = minicnt = stdcnt = 0; while (sc->ti_rx_saved_considx != sc->ti_return_prodidx.ti_idx) { struct ti_rx_desc *cur_rx; - struct mbuf *m = NULL; uint32_t rxidx; + struct mbuf *m = NULL; uint16_t vlan_tag = 0; int have_tag = 0; @@ -2670,7 +2672,7 @@ ti_rxeof(struct ti_softc *sc) } if (cur_rx->ti_flags & TI_BDFLAG_JUMBO_RING) { - + jumbocnt++; TI_INC(sc->ti_jumbo, TI_JUMBO_RX_RING_CNT); m = sc->ti_cdata.ti_rx_jumbo_chain[rxidx]; sc->ti_cdata.ti_rx_jumbo_chain[rxidx] = NULL; @@ -2700,6 +2702,7 @@ ti_rxeof(struct ti_softc *sc) m_adj(m, cur_rx->ti_len - m->m_pkthdr.len); #endif /* TI_PRIVATE_JUMBOS */ } else if (cur_rx->ti_flags & TI_BDFLAG_MINI_RING) { + minicnt++; TI_INC(sc->ti_mini, TI_MINI_RX_RING_CNT); m = sc->ti_cdata.ti_rx_mini_chain[rxidx]; sc->ti_cdata.ti_rx_mini_chain[rxidx] = NULL; @@ -2719,6 +2722,7 @@ ti_rxeof(struct ti_softc *sc) } m->m_len = cur_rx->ti_len; } else { + stdcnt++; TI_INC(sc->ti_std, TI_STD_RX_RING_CNT); m = sc->ti_cdata.ti_rx_std_chain[rxidx]; sc->ti_cdata.ti_rx_std_chain[rxidx] = NULL; @@ -2774,9 +2778,12 @@ ti_rxeof(struct ti_softc *sc) CSR_WRITE_4(sc, TI_GCR_RXRETURNCONS_IDX, sc->ti_rx_saved_considx); - TI_UPDATE_STDPROD(sc, sc->ti_std); - TI_UPDATE_MINIPROD(sc, sc->ti_mini); - TI_UPDATE_JUMBOPROD(sc, sc->ti_jumbo); + if (stdcnt > 0) + TI_UPDATE_STDPROD(sc, sc->ti_std); + if (minicnt > 0) + TI_UPDATE_MINIPROD(sc, sc->ti_mini); + if (jumbocnt > 0) + TI_UPDATE_JUMBOPROD(sc, sc->ti_jumbo); } static void |
