dpaa2: add support for several interface counters

Add support for IFCOUNTER_IPACKETS, IFCOUNTER_OPACKETS,
IFCOUNTER_OBYTES, IFCOUNTER_OMCASTS, IFCOUNTER_OERRORS, and
IFCOUNTER_OQDROPS.
This allows tools like systat to report the incoming and outgoing
bandwidth.

Reviewed by:		dsl, Timo Völker
MFC after:		1 week
Differential Revision:	https://reviews.freebsd.org/D54893

sys/dev/dpaa2/dpaa2_ni.c

@@ -2532,6 +2532,7 @@ dpaa2_ni_transmit(if_t ifp, struct mbuf *m)
 	ch = sc->channels[chidx];
 	error = buf_ring_enqueue(ch->xmit_br, m);
 	if (__predict_false(error != 0)) {
+		if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
 		m_freem(m);
 	} else {
 		taskqueue_enqueue(ch->cleanup_tq, &ch->cleanup_task);
@@ -2943,6 +2944,8 @@ dpaa2_ni_tx(struct dpaa2_ni_softc *sc, struct dpaa2_channel *ch,
 	bus_dma_segment_t segs[DPAA2_TX_SEGLIMIT];
 	int rc, nsegs;
 	int error;
+	int len;
+	bool mcast;
 
 	mtx_assert(&tx->lock, MA_NOTOWNED);
 	mtx_lock(&tx->lock);
@@ -2957,6 +2960,8 @@ dpaa2_ni_tx(struct dpaa2_ni_softc *sc, struct dpaa2_channel *ch,
 		buf->m = m;
 		sgt = buf->sgt;
 	}
+	len = m->m_pkthdr.len;
+	mcast = (m->m_flags & M_MCAST) != 0;
 
 #if defined(INVARIANTS)
 	struct dpaa2_ni_tx_ring *btx = (struct dpaa2_ni_tx_ring *)buf->opt;
@@ -2974,6 +2979,7 @@ dpaa2_ni_tx(struct dpaa2_ni_softc *sc, struct dpaa2_channel *ch,
 		if (md == NULL) {
 			device_printf(dev, "%s: m_collapse() failed\n", __func__);
 			fq->chan->tx_dropped++;
+			if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, 1);
 			goto err;
 		}
 
@@ -2984,6 +2990,7 @@ dpaa2_ni_tx(struct dpaa2_ni_softc *sc, struct dpaa2_channel *ch,
 			device_printf(dev, "%s: bus_dmamap_load_mbuf_sg() "
 			    "failed: error=%d\n", __func__, error);
 			fq->chan->tx_dropped++;
+			if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, 1);
 			goto err;
 		}
 	}
@@ -2993,6 +3000,7 @@ dpaa2_ni_tx(struct dpaa2_ni_softc *sc, struct dpaa2_channel *ch,
 		device_printf(dev, "%s: failed to build frame descriptor: "
 		    "error=%d\n", __func__, error);
 		fq->chan->tx_dropped++;
+		if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, 1);
 		goto err_unload;
 	}
 
@@ -3010,8 +3018,13 @@ dpaa2_ni_tx(struct dpaa2_ni_softc *sc, struct dpaa2_channel *ch,
 
 	if (rc != 1) {
 		fq->chan->tx_dropped++;
+		if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, 1);
 		goto err_unload;
 	} else {
+		if (mcast)
+			if_inc_counter(sc->ifp, IFCOUNTER_OMCASTS, 1);
+		if_inc_counter(sc->ifp, IFCOUNTER_OPACKETS, 1);
+		if_inc_counter(sc->ifp, IFCOUNTER_OBYTES, len);
 		fq->chan->tx_frames++;
 	}
 	return;
@@ -3190,6 +3203,7 @@ dpaa2_ni_rx(struct dpaa2_channel *ch, struct dpaa2_ni_fq *fq, struct dpaa2_fd *f
 	m->m_pkthdr.rcvif = sc->ifp;
 	m->m_pkthdr.flowid = fq->fqid;
 	M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE);
+	if_inc_counter(sc->ifp, IFCOUNTER_IPACKETS, 1);
 
 	if (ctx->head == NULL) {
 		KASSERT(ctx->tail == NULL, ("%s: tail already given?", __func__));