When we init the hardware's rx/tx ring configuration we need to
adjust our internal state, as this implicitly resets the current descriptor pointer. Previously "ifconfig eqos0 down; ifconfig eqos0 up" made the interface non-functional.
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64b6590238
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@ -1,4 +1,4 @@
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/* $NetBSD: dwc_eqos.c,v 1.6 2022/04/16 23:20:47 jmcneill Exp $ */
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/* $NetBSD: dwc_eqos.c,v 1.7 2022/07/20 18:48:41 martin Exp $ */
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/*-
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* Copyright (c) 2022 Jared McNeill <jmcneill@invisible.ca>
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@ -33,7 +33,7 @@
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#include "opt_net_mpsafe.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: dwc_eqos.c,v 1.6 2022/04/16 23:20:47 jmcneill Exp $");
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__KERNEL_RCSID(0, "$NetBSD: dwc_eqos.c,v 1.7 2022/07/20 18:48:41 martin Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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@ -510,7 +510,13 @@ eqos_reset(struct eqos_softc *sc)
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static void
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eqos_init_rings(struct eqos_softc *sc, int qid)
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{
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sc->sc_tx.queued = 0;
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/*
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* We reset the rings paddr, this implicitly resets
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* the hardwares current descriptor pointer.
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* Adjust our internal state accordingly.
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*/
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sc->sc_tx.cur = sc->sc_tx.next = sc->sc_tx.queued = 0;
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sc->sc_rx.cur = sc->sc_rx.next = sc->sc_rx.queued = 0;
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WR4(sc, GMAC_DMA_CHAN0_TX_BASE_ADDR_HI,
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(uint32_t)(sc->sc_tx.desc_ring_paddr >> 32));
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