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Cache the tx producer index instead of reading it every time ti_start is

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called.
This commit is contained in:
scottl 2005-12-28 08:36:32 +00:00
parent fd8dcc6063
commit 7e6d523277
2 changed files with 4 additions and 1 deletions
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4
sys/dev/ti/if_ti.c
View File

@ -1727,6 +1727,7 @@ ti_init_tx_ring(sc)
{
sc->ti_txcnt = 0;
sc->ti_tx_saved_considx = 0;
sc->ti_tx_saved_prodidx = 0;
CSR_WRITE_4(sc, TI_MB_SENDPROD_IDX, 0);
return (0);
}
@ -3102,7 +3103,7 @@ ti_start_locked(ifp)
sc = ifp->if_softc;
prodidx = CSR_READ_4(sc, TI_MB_SENDPROD_IDX);
prodidx = sc->ti_tx_saved_prodidx;
while (sc->ti_cdata.ti_tx_chain[prodidx] == NULL) {
IF_DEQUEUE(&ifp->if_snd, m_head);
@ -3146,6 +3147,7 @@ ti_start_locked(ifp)
}
/* Transmit */
sc->ti_tx_saved_prodidx = prodidx;
CSR_WRITE_4(sc, TI_MB_SENDPROD_IDX, prodidx);
/*

1
sys/dev/ti/if_tireg.h
View File

@ -1009,6 +1009,7 @@ struct ti_softc {
#define ti_ev_prodidx ti_rdata->ti_ev_prodidx_r
#define ti_return_prodidx ti_rdata->ti_return_prodidx_r
#define ti_tx_considx ti_rdata->ti_tx_considx_r
u_int16_t ti_tx_saved_prodidx;
u_int16_t ti_tx_saved_considx;
u_int16_t ti_rx_saved_considx;
u_int16_t ti_ev_saved_considx;