Index: if_aq_pci.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_aq_pci.c,v
retrieving revision 1.1
diff -u -p -r1.1 if_aq_pci.c
--- if_aq_pci.c	2 Sep 2021 10:11:21 -0000	1.1
+++ if_aq_pci.c	6 Sep 2021 11:56:29 -0000
@@ -2096,6 +2096,8 @@ aq_rx_fill_slots(struct aq_softc *sc, st
 		}
 		as->as_m = m;
 
+		bus_dmamap_sync(sc->sc_dmat, as->as_map, 0,
+		    as->as_map->dm_mapsize, BUS_DMASYNC_PREREAD);
 		htolem64(&rd->buf_addr, as->as_map->dm_segs[0].ds_addr);
 		rd->hdr_addr = 0;
 		p++;
@@ -2197,6 +2199,10 @@ aq_rxeof(struct aq_softc *sc, struct aq_
 		if (idx == AQ_RXD_NUM)
 			idx = 0;
 	}
+
+	bus_dmamap_sync(sc->sc_dmat, AQ_DMA_MAP(&rx->rx_mem), 0,
+	    AQ_DMA_LEN(&rx->rx_mem), BUS_DMASYNC_PREREAD);
+
 	rx->rx_cons = idx;
 
 	if (rxfree > 0) {
@@ -2230,6 +2236,8 @@ aq_txeof(struct aq_softc *sc, struct aq_
 
 	while (idx != end) {
 		as = &tx->tx_slots[idx];
+		bus_dmamap_sync(sc->sc_dmat, as->as_map, 0,
+		    as->as_map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
 		bus_dmamap_unload(sc->sc_dmat, as->as_map);
 
 		m_freem(as->as_m);
@@ -2241,6 +2249,9 @@ aq_txeof(struct aq_softc *sc, struct aq_
 		free++;
 	}
 
+	bus_dmamap_sync(sc->sc_dmat, AQ_DMA_MAP(&tx->tx_mem), 0,
+	    AQ_DMA_LEN(&tx->tx_mem), BUS_DMASYNC_PREREAD);
+
 	tx->tx_cons = idx;
 
 	if (free != 0) {
@@ -2438,6 +2449,14 @@ aq_queue_up(struct aq_softc *sc, struct 
 		goto destroy_tx_slots;
 	}
 
+	bus_dmamap_sync(sc->sc_dmat, AQ_DMA_MAP(&tx->tx_mem),
+	    0, AQ_DMA_LEN(&tx->tx_mem),
+	    BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
+
+	bus_dmamap_sync(sc->sc_dmat, AQ_DMA_MAP(&rx->rx_mem),
+	    0, AQ_DMA_LEN(&rx->rx_mem),
+	    BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
+
 	aq_txring_reset(sc, tx, 1);
 	aq_rxring_reset(sc, rx, 1);
 	return 0;
@@ -2468,6 +2487,10 @@ aq_queue_down(struct aq_softc *sc, struc
 		tx->tx_slots = NULL;
 	}
 
+	bus_dmamap_sync(sc->sc_dmat, AQ_DMA_MAP(&tx->tx_mem),
+	    0, AQ_DMA_LEN(&tx->tx_mem),
+	    BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
+
 	aq_dmamem_free(sc, &tx->tx_mem);
 
 	rx = &aq->q_rx;
@@ -2476,6 +2499,10 @@ aq_queue_down(struct aq_softc *sc, struc
 		aq_free_slots(sc, rx->rx_slots, AQ_RXD_NUM, AQ_RXD_NUM);
 		rx->rx_slots = NULL;
 	}
+
+	bus_dmamap_sync(sc->sc_dmat, AQ_DMA_MAP(&rx->rx_mem),
+	    0, AQ_DMA_LEN(&rx->rx_mem),
+	    BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
 
 	aq_dmamem_free(sc, &rx->rx_mem);
 }