net: atlantic: additional per-queue stats

This patch adds additional per-queue stats, these could
be useful for debugging and diagnostics.

Signed-off-by: Dmitry Bogdanov <dbogdanov@marvell.com>
Signed-off-by: Mark Starovoytov <mstarovoitov@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c

@@ -94,6 +94,9 @@ static const char * const aq_ethtool_queue_rx_stat_names[] = {
 	"%sQueue[%d] InJumboPackets",
 	"%sQueue[%d] InLroPackets",
 	"%sQueue[%d] InErrors",
+	"%sQueue[%d] AllocFails",
+	"%sQueue[%d] SkbAllocFails",
+	"%sQueue[%d] Polls",
 };
 
 static const char * const aq_ethtool_queue_tx_stat_names[] = {

drivers/net/ethernet/aquantia/atlantic/aq_ring.c

@@ -94,6 +94,11 @@ static int aq_get_rxpages(struct aq_ring_s *self, struct aq_ring_buff_s *rxbuf,
 	if (!rxbuf->rxdata.page) {
 		ret = aq_get_rxpage(&rxbuf->rxdata, order,
 				    aq_nic_get_dev(self->aq_nic));
+		if (ret) {
+			u64_stats_update_begin(&self->stats.rx.syncp);
+			self->stats.rx.alloc_fails++;
+			u64_stats_update_end(&self->stats.rx.syncp);
+		}
 		return ret;
 	}
 
@@ -414,6 +419,9 @@ int aq_ring_rx_clean(struct aq_ring_s *self,
 			skb = build_skb(aq_buf_vaddr(&buff->rxdata),
 					AQ_CFG_RX_FRAME_MAX);
 			if (unlikely(!skb)) {
+				u64_stats_update_begin(&self->stats.rx.syncp);
+				self->stats.rx.skb_alloc_fails++;
+				u64_stats_update_end(&self->stats.rx.syncp);
 				err = -ENOMEM;
 				goto err_exit;
 			}
@@ -427,6 +435,9 @@ int aq_ring_rx_clean(struct aq_ring_s *self,
 		} else {
 			skb = napi_alloc_skb(napi, AQ_CFG_RX_HDR_SIZE);
 			if (unlikely(!skb)) {
+				u64_stats_update_begin(&self->stats.rx.syncp);
+				self->stats.rx.skb_alloc_fails++;
+				u64_stats_update_end(&self->stats.rx.syncp);
 				err = -ENOMEM;
 				goto err_exit;
 			}
@@ -599,6 +610,9 @@ unsigned int aq_ring_fill_stats_data(struct aq_ring_s *self, u64 *data)
 			data[++count] = self->stats.rx.jumbo_packets;
 			data[++count] = self->stats.rx.lro_packets;
 			data[++count] = self->stats.rx.errors;
+			data[++count] = self->stats.rx.alloc_fails;
+			data[++count] = self->stats.rx.skb_alloc_fails;
+			data[++count] = self->stats.rx.polls;
 		} while (u64_stats_fetch_retry_irq(&self->stats.rx.syncp, start));
 	} else {
 		/* This data should mimic aq_ethtool_queue_tx_stat_names structure */

drivers/net/ethernet/aquantia/atlantic/aq_ring.h

@@ -95,6 +95,9 @@ struct aq_ring_stats_rx_s {
 	u64 bytes;
 	u64 lro_packets;
 	u64 jumbo_packets;
+	u64 alloc_fails;
+	u64 skb_alloc_fails;
+	u64 polls;
 	u64 pg_losts;
 	u64 pg_flips;
 	u64 pg_reuses;

drivers/net/ethernet/aquantia/atlantic/aq_vec.c

@@ -45,6 +45,9 @@ static int aq_vec_poll(struct napi_struct *napi, int budget)
 	} else {
 		for (i = 0U, ring = self->ring[0];
 			self->tx_rings > i; ++i, ring = self->ring[i]) {
+			u64_stats_update_begin(&ring[AQ_VEC_RX_ID].stats.rx.syncp);
+			ring[AQ_VEC_RX_ID].stats.rx.polls++;
+			u64_stats_update_end(&ring[AQ_VEC_RX_ID].stats.rx.syncp);
 			if (self->aq_hw_ops->hw_ring_tx_head_update) {
 				err = self->aq_hw_ops->hw_ring_tx_head_update(
 							self->aq_hw,