Raise transmit threshold to 512 bytes. This makes dwqe(4) work at

1000baseT.  We still see a small number of underflow errors when hammering
the interface with packets, but it is defenitely usable.

While there, make sure we count transmit errors.

ok jmatthew@

diff --git a/sys/dev/ic/dwqe.c b/sys/dev/ic/dwqe.c
index e11fee3..026f4e2 100644 (file)
--- a/sys/dev/ic/dwqe.c
+++ b/sys/dev/ic/dwqe.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: dwqe.c,v 1.10 2023/07/04 12:48:42 kettenis Exp $      */
+/*     $OpenBSD: dwqe.c,v 1.11 2023/08/07 20:28:47 kettenis Exp $      */
 /*
  * Copyright (c) 2008, 2019 Mark Kettenis <kettenis@openbsd.org>
  * Copyright (c) 2017, 2022 Patrick Wildt <patrick@blueri.se>
@@ -608,6 +608,9 @@ dwqe_tx_proc(struct dwqe_softc *sc)
                if (txd->sd_tdes3 & TDES3_OWN)
                        break;
 
+               if (txd->sd_tdes3 & TDES3_ES)
+                       ifp->if_oerrors++;
+
                txb = &sc->sc_txbuf[idx];
                if (txb->tb_m) {
                        bus_dmamap_sync(sc->sc_dmat, txb->tb_map, 0,
@@ -808,7 +811,7 @@ dwqe_up(struct dwqe_softc *sc)
        if (sc->sc_force_thresh_dma_mode) {
                mode &= ~GMAC_MTL_CHAN_TX_OP_MODE_TSF;
                mode &= ~GMAC_MTL_CHAN_TX_OP_MODE_TTC_MASK;
-               mode |= GMAC_MTL_CHAN_TX_OP_MODE_TTC_128;
+               mode |= GMAC_MTL_CHAN_TX_OP_MODE_TTC_512;
        } else {
                mode |= GMAC_MTL_CHAN_TX_OP_MODE_TSF;
        }