sfxge: implement if_get_counter callback

Sponsored by:   Solarflare Communications, Inc.
Approved by:    gnn (mentor)

sys/dev/sfxge/sfxge.c

@@ -61,10 +61,10 @@ __FBSDID("$FreeBSD$");
 #define	SFXGE_CAP (IFCAP_VLAN_MTU | \
 		   IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM | IFCAP_TSO |	\
 		   IFCAP_JUMBO_MTU | IFCAP_LRO |			\
-		   IFCAP_VLAN_HWTSO | IFCAP_LINKSTATE)
+		   IFCAP_VLAN_HWTSO | IFCAP_LINKSTATE | IFCAP_HWSTATS)
 #define	SFXGE_CAP_ENABLE SFXGE_CAP
 #define	SFXGE_CAP_FIXED (IFCAP_VLAN_MTU | IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM | \
-			 IFCAP_JUMBO_MTU | IFCAP_LINKSTATE)
+			 IFCAP_JUMBO_MTU | IFCAP_LINKSTATE | IFCAP_HWSTATS)
 
 MALLOC_DEFINE(M_SFXGE, "sfxge", "Solarflare 10GigE driver");
 
@@ -343,6 +343,8 @@ sfxge_ifnet_init(struct ifnet *ifp, struct sfxge_softc *sc)
 	mtx_init(&sc->tx_lock, sc->tx_lock_name, NULL, MTX_DEF);
 #endif
 
+	ifp->if_get_counter = sfxge_get_counter;
+
 	if ((rc = sfxge_port_ifmedia_init(sc)) != 0)
 		goto fail;
 

sys/dev/sfxge/sfxge.h

@@ -324,6 +324,7 @@ extern void sfxge_mac_link_update(struct sfxge_softc *sc,
     efx_link_mode_t mode);
 extern int sfxge_mac_filter_set(struct sfxge_softc *sc);
 extern int sfxge_port_ifmedia_init(struct sfxge_softc *sc);
+extern uint64_t sfxge_get_counter(struct ifnet *ifp, ift_counter c);
 
 #define	SFXGE_MAX_MTU (9 * 1024)
 

sys/dev/sfxge/sfxge_port.c

@@ -85,6 +85,68 @@ sfxge_mac_stat_update(struct sfxge_softc *sc)
 	return (rc);
 }
 
+uint64_t
+sfxge_get_counter(struct ifnet *ifp, ift_counter c)
+{
+	struct sfxge_softc *sc = ifp->if_softc;
+	uint64_t *mac_stats;
+	uint64_t val;
+
+	SFXGE_PORT_LOCK(&sc->port);
+
+	/* Ignore error and use old values */
+	(void)sfxge_mac_stat_update(sc);
+
+	mac_stats = (uint64_t *)sc->port.mac_stats.decode_buf;
+
+	switch (c) {
+	case IFCOUNTER_IPACKETS:
+		val = mac_stats[EFX_MAC_RX_PKTS];
+		break;
+	case IFCOUNTER_IERRORS:
+		val = mac_stats[EFX_MAC_RX_ERRORS];
+		break;
+	case IFCOUNTER_OPACKETS:
+		val = mac_stats[EFX_MAC_TX_PKTS];
+		break;
+	case IFCOUNTER_OERRORS:
+		val = mac_stats[EFX_MAC_TX_ERRORS];
+		break;
+	case IFCOUNTER_COLLISIONS:
+		val = mac_stats[EFX_MAC_TX_SGL_COL_PKTS] +
+		      mac_stats[EFX_MAC_TX_MULT_COL_PKTS] +
+		      mac_stats[EFX_MAC_TX_EX_COL_PKTS] +
+		      mac_stats[EFX_MAC_TX_LATE_COL_PKTS];
+		break;
+	case IFCOUNTER_IBYTES:
+		val = mac_stats[EFX_MAC_RX_OCTETS];
+		break;
+	case IFCOUNTER_OBYTES:
+		val = mac_stats[EFX_MAC_TX_OCTETS];
+		break;
+	case IFCOUNTER_OMCASTS:
+		val = mac_stats[EFX_MAC_TX_MULTICST_PKTS] +
+		      mac_stats[EFX_MAC_TX_BRDCST_PKTS];
+		break;
+	case IFCOUNTER_OQDROPS:
+		SFXGE_PORT_UNLOCK(&sc->port);
+		return (sfxge_tx_get_drops(sc));
+	case IFCOUNTER_IMCASTS:
+		/* if_imcasts is maintained in net/if_ethersubr.c */
+	case IFCOUNTER_IQDROPS:
+		/* if_iqdrops is maintained in net/if_ethersubr.c */
+	case IFCOUNTER_NOPROTO:
+		/* if_noproto is maintained in net/if_ethersubr.c */
+	default:
+		SFXGE_PORT_UNLOCK(&sc->port);
+		return (if_get_counter_default(ifp, c));
+	}
+
+	SFXGE_PORT_UNLOCK(&sc->port);
+
+	return (val);
+}
+
 static int
 sfxge_mac_stat_handler(SYSCTL_HANDLER_ARGS)
 {

sys/dev/sfxge/sfxge_tx.c

@@ -1566,6 +1566,29 @@ sfxge_tx_stat_init(struct sfxge_softc *sc)
 	}
 }
 
+uint64_t
+sfxge_tx_get_drops(struct sfxge_softc *sc)
+{
+	unsigned int index;
+	uint64_t drops = 0;
+	struct sfxge_txq *txq;
+
+	/* Sum across all TX queues */
+	for (index = 0; index < sc->txq_count; index++) {
+		txq = sc->txq[index];
+		/*
+		 * In theory, txq->put_overflow and txq->netdown_drops
+		 * should use atomic operation and other should be
+		 * obtained under txq lock, but it is just statistics.
+		 */
+		drops += txq->drops + txq->get_overflow +
+			 txq->get_non_tcp_overflow +
+			 txq->put_overflow + txq->netdown_drops +
+			 txq->tso_pdrop_too_many + txq->tso_pdrop_no_rsrc;
+	}
+	return (drops);
+}
+
 void
 sfxge_tx_fini(struct sfxge_softc *sc)
 {

sys/dev/sfxge/sfxge_tx.h

@@ -217,6 +217,7 @@ struct sfxge_txq {
 struct sfxge_evq;
 
 extern int sfxge_tx_packet_add(struct sfxge_txq *, struct mbuf *);
+extern uint64_t sfxge_tx_get_drops(struct sfxge_softc *sc);
 
 extern int sfxge_tx_init(struct sfxge_softc *sc);
 extern void sfxge_tx_fini(struct sfxge_softc *sc);