cxgb4: add stats for MQPRIO QoS offload Tx path

Export necessary stats for traffic flowing through MQPRIO QoS offload
Tx path.

v2:
- No change.
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

@@ -850,6 +850,7 @@ struct sge_eohw_txq {
 	struct sge_txq q; /* HW Txq */
 	struct adapter *adap; /* Backpointer to adapter */
 	unsigned long tso; /* # of TSO requests */
+	unsigned long uso; /* # of USO requests */
 	unsigned long tx_cso; /* # of Tx checksum offloads */
 	unsigned long vlan_ins; /* # of Tx VLAN insertions */
 	unsigned long mapping_err; /* # of I/O MMU packet mapping errors */

drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c

@@ -2797,6 +2797,7 @@ do { \
 		RL("RxAN", stats.an);
 		RL("RxNoMem", stats.nomem);
 		TL("TSO:", tso);
+		TL("USO:", uso);
 		TL("TxCSO:", tx_cso);
 		TL("VLANins:", vlan_ins);
 		TL("TxQFull:", q.stops);

drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c

@@ -242,9 +242,10 @@ static void collect_sge_port_stats(const struct adapter *adap,
 				   const struct port_info *p,
 				   struct queue_port_stats *s)
 {
-	int i;
 	const struct sge_eth_txq *tx = &adap->sge.ethtxq[p->first_qset];
 	const struct sge_eth_rxq *rx = &adap->sge.ethrxq[p->first_qset];
+	struct sge_eohw_txq *eohw_tx;
+	unsigned int i;
 
 	memset(s, 0, sizeof(*s));
 	for (i = 0; i < p->nqsets; i++, rx++, tx++) {
@@ -257,6 +258,16 @@ static void collect_sge_port_stats(const struct adapter *adap,
 		s->gro_pkts += rx->stats.lro_pkts;
 		s->gro_merged += rx->stats.lro_merged;
 	}
+
+	if (adap->sge.eohw_txq) {
+		eohw_tx = &adap->sge.eohw_txq[p->first_qset];
+		for (i = 0; i < p->nqsets; i++, eohw_tx++) {
+			s->tso += eohw_tx->tso;
+			s->uso += eohw_tx->uso;
+			s->tx_csum += eohw_tx->tx_cso;
+			s->vlan_ins += eohw_tx->vlan_ins;
+		}
+	}
 }
 
 static void collect_adapter_stats(struct adapter *adap, struct adapter_stats *s)

drivers/net/ethernet/chelsio/cxgb4/sge.c

@@ -2262,6 +2262,19 @@ static void ethofld_hard_xmit(struct net_device *dev,
 				d->addr);
 	}
 
+	if (skb_shinfo(skb)->gso_size) {
+		if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4)
+			eohw_txq->uso++;
+		else
+			eohw_txq->tso++;
+		eohw_txq->tx_cso += skb_shinfo(skb)->gso_segs;
+	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
+		eohw_txq->tx_cso++;
+	}
+
+	if (skb_vlan_tag_present(skb))
+		eohw_txq->vlan_ins++;
+
 	txq_advance(&eohw_txq->q, ndesc);
 	cxgb4_ring_tx_db(adap, &eohw_txq->q, ndesc);
 	eosw_txq_advance_index(&eosw_txq->last_pidx, 1, eosw_txq->ndesc);
@@ -4546,6 +4559,7 @@ int t4_sge_alloc_ethofld_txq(struct adapter *adap, struct sge_eohw_txq *txq,
 	spin_lock_init(&txq->lock);
 	txq->adap = adap;
 	txq->tso = 0;
+	txq->uso = 0;
 	txq->tx_cso = 0;
 	txq->vlan_ins = 0;
 	txq->mapping_err = 0;