[src/trunk]: src/sys/dev/ic Some of the Tulip clone chips (like the Winbond a...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/49cf1ebc6bf5
branches:  trunk
changeset: 475971:49cf1ebc6bf5
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Wed Sep 01 05:07:03 1999 +0000

description:
Some of the Tulip clone chips (like the Winbond and ASIX) want the
IC bit set in the *first* descriptor of the outgoing packet.  Appease
them.

diffstat:

 sys/dev/ic/tulip.c    |  30 ++++++++++++++++++++++++++++--
 sys/dev/ic/tulipvar.h |   3 ++-
 2 files changed, 30 insertions(+), 3 deletions(-)

diffs (82 lines):

diff -r e7bf1c12e937 -r 49cf1ebc6bf5 sys/dev/ic/tulip.c
--- a/sys/dev/ic/tulip.c        Wed Sep 01 05:03:41 1999 +0000
+++ b/sys/dev/ic/tulip.c        Wed Sep 01 05:07:03 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tulip.c,v 1.1 1999/09/01 00:32:41 thorpej Exp $        */
+/*     $NetBSD: tulip.c,v 1.2 1999/09/01 05:07:03 thorpej Exp $        */
 
 /*-
  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
@@ -202,6 +202,18 @@
                break;
        }
 
+       /*
+        * Set up various chip-specific quirks.
+        */
+       switch (sc->sc_chip) {
+       case TULIP_CHIP_WB89C840F:
+               sc->sc_flags |= TULIPF_IC_FS;
+               break;
+
+       default:
+               /* Nothing. */
+       }
+
        SIMPLEQ_INIT(&sc->sc_txfreeq);
        SIMPLEQ_INIT(&sc->sc_txdirtyq);
 
@@ -363,7 +375,7 @@
 {
        struct tulip_softc *sc = ifp->if_softc;
        struct mbuf *m0, *m;
-       struct tulip_txsoft *txs;
+       struct tulip_txsoft *txs, *last_txs;
        bus_dmamap_t dmamap;
        int error, firsttx, nexttx, lasttx, ofree, seg;
 
@@ -538,6 +550,8 @@
                SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs, txs_q);
                SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q);
 
+               last_txs = txs;
+
 #if NBPFILTER > 0
                /*
                 * Pass the packet to any BPF listeners.
@@ -564,6 +578,18 @@
                    BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
 
                /*
+                * Some clone chips want IC on the *first* segment in
+                * the packet.  Appease them.
+                */
+               if ((sc->sc_flags & TULIPF_IC_FS) != 0 &&
+                   last_txs->txs_firstdesc != lasttx) {
+                       sc->sc_txdescs[last_txs->txs_firstdesc].td_ctl |=
+                           TDCTL_Tx_IC;
+                       TULIP_CDTXSYNC(sc, last_txs->txs_firstdesc, 1,
+                           BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
+               }
+
+               /*
                 * The entire packet chain is set up.  Give the
                 * first descriptor to the chip now.
                 */
diff -r e7bf1c12e937 -r 49cf1ebc6bf5 sys/dev/ic/tulipvar.h
--- a/sys/dev/ic/tulipvar.h     Wed Sep 01 05:03:41 1999 +0000
+++ b/sys/dev/ic/tulipvar.h     Wed Sep 01 05:07:03 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tulipvar.h,v 1.1 1999/09/01 00:32:42 thorpej Exp $     */
+/*     $NetBSD: tulipvar.h,v 1.2 1999/09/01 05:07:04 thorpej Exp $     */
 
 /*-
  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
@@ -251,6 +251,7 @@
 /* sc_flags */
 #define        TULIPF_WANT_SETUP       0x00000001      /* want filter setup */
 #define        TULIPF_HAS_MII          0x00000002      /* has media on MII */
+#define        TULIPF_IC_FS            0x00000004      /* IC bit on first tx seg */
 
 #define        TULIP_CDTXADDR(sc, x)   ((sc)->sc_cddma + TULIP_CDTXOFF((x)))
 #define        TULIP_CDRXADDR(sc, x)   ((sc)->sc_cddma + TULIP_CDRXOFF((x)))