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Track which ring was updated in RX handler and update only modified

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ring. This should reduce unnecessary register accesses.
This commit is contained in:
yongari 2011-11-07 22:11:38 +00:00
parent 422432aa2b
commit ab2f26b102
1 changed files with 12 additions and 5 deletions
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17
sys/dev/ti/if_ti.c
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@ -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