Performance enhancements and a redesign of the transmitter code.
Submitted by: "Serge A. Babkin" <babkin@hq.icb.chel.su>
This commit is contained in:
Jordan K. Hubbard
parent
d3a2b17ad7
commit
c8aaabd573
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=7749
@ -38,7 +38,7 @@
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*/
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/*
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* March 28 1995
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* $Id: if_ep.c,v 1.13 1995/04/10 07:54:34 root Exp root $
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*
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* Promiscuous mode added and interrupt logic slightly changed
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* to reduce the number of adapter failures. Transceiver select
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@ -618,6 +618,16 @@ epinit(unit)
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}
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outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | sc->rx_early_thresh);
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/*
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* These clever computations look very interesting
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* but the fixed threshold gives near no output errors
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* and if it as low as 16 bytes it gives the max. throughput.
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* We think that processor is anyway quicker than Ethernet
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* (and this should be true for any 386 and higher)
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*/
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outw(BASE + EP_COMMAND, SET_TX_START_THRESH | 16);
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/*
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* Store up a bunch of mbuf's for use later. (MAX_MBS). First we free up
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* any that we had in case we're being called from intr or somewhere
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@ -692,7 +702,15 @@ epstart(ifp)
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/* compute the Tx start threshold for this packet */
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sc->tx_start_thresh = len =
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(((len * (64 - sc->tx_rate)) >> 6) & ~3) + 16;
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#if 0
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/*
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* The following string does something strange with the card and
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* we get a lot of output errors due to it so it's commented out
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* and we use fixed threshold (see above)
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*/
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outw(BASE + EP_COMMAND, SET_TX_START_THRESH | len);
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#endif
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for (top = m; m != 0; m = m->m_next)
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if(ep_ftst(F_ACCESS_32_BITS)) {
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@ -757,6 +775,9 @@ epintr(unit)
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register struct ep_softc *sc = &ep_softc[unit];
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struct ifnet *ifp = &sc->arpcom.ac_if;
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struct mbuf *m;
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int x;
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x=splbio();
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outw(BASE + EP_COMMAND, SET_INTR_MASK); /* disable all Ints */
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@ -793,6 +814,7 @@ epintr(unit)
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printf("ep%d: Status: %x\n", unit, status);
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#endif
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epinit(unit);
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splx(x);
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return;
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}
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if (status & S_TX_COMPLETE) {
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@ -846,6 +868,7 @@ epintr(unit)
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/* re-enable Ints */
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outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS);
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splx(x);
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}
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void
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@ -31,7 +31,7 @@
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*/
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/*
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* March 28 1995
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* $Id: if_epreg.h,v 1.8 1995/04/10 07:48:03 root Exp root $
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*
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* Promiscuous mode added and interrupt logic slightly changed
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* to reduce the number of adapter failures. Transceiver select
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@ -38,7 +38,7 @@
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*/
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/*
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* March 28 1995
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* $Id: if_ep.c,v 1.13 1995/04/10 07:54:34 root Exp root $
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*
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* Promiscuous mode added and interrupt logic slightly changed
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* to reduce the number of adapter failures. Transceiver select
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@ -618,6 +618,16 @@ epinit(unit)
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}
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outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | sc->rx_early_thresh);
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/*
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* These clever computations look very interesting
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* but the fixed threshold gives near no output errors
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* and if it as low as 16 bytes it gives the max. throughput.
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* We think that processor is anyway quicker than Ethernet
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* (and this should be true for any 386 and higher)
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*/
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outw(BASE + EP_COMMAND, SET_TX_START_THRESH | 16);
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/*
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* Store up a bunch of mbuf's for use later. (MAX_MBS). First we free up
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* any that we had in case we're being called from intr or somewhere
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@ -692,7 +702,15 @@ epstart(ifp)
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/* compute the Tx start threshold for this packet */
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sc->tx_start_thresh = len =
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(((len * (64 - sc->tx_rate)) >> 6) & ~3) + 16;
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#if 0
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/*
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* The following string does something strange with the card and
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* we get a lot of output errors due to it so it's commented out
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* and we use fixed threshold (see above)
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*/
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outw(BASE + EP_COMMAND, SET_TX_START_THRESH | len);
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#endif
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for (top = m; m != 0; m = m->m_next)
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if(ep_ftst(F_ACCESS_32_BITS)) {
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@ -757,6 +775,9 @@ epintr(unit)
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register struct ep_softc *sc = &ep_softc[unit];
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struct ifnet *ifp = &sc->arpcom.ac_if;
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struct mbuf *m;
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int x;
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x=splbio();
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outw(BASE + EP_COMMAND, SET_INTR_MASK); /* disable all Ints */
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@ -793,6 +814,7 @@ epintr(unit)
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printf("ep%d: Status: %x\n", unit, status);
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#endif
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epinit(unit);
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splx(x);
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return;
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}
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if (status & S_TX_COMPLETE) {
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@ -846,6 +868,7 @@ epintr(unit)
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/* re-enable Ints */
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outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS);
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splx(x);
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}
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void
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@ -31,7 +31,7 @@
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*/
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/*
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* March 28 1995
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* $Id: if_epreg.h,v 1.8 1995/04/10 07:48:03 root Exp root $
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*
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* Promiscuous mode added and interrupt logic slightly changed
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* to reduce the number of adapter failures. Transceiver select
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