[RFC v2 7/9] net/gve: support basic stats for DQO

[Junfeng Guo <junfeng.guo@intel.com>]

Add basic stats support for DQO.

Signed-off-by: Junfeng Guo <junfeng.guo@intel.com>
Signed-off-by: Rushil Gupta <rushilg@google.com>
Signed-off-by: Jordan Kimbrough <jrkim@google.com>
Signed-off-by: Jeroen de Borst <jeroendb@google.com>
---
 drivers/net/gve/gve_ethdev.c | 60 ++++++++++++++++++++++++++++++++++++
 drivers/net/gve/gve_ethdev.h | 11 +++++++
 drivers/net/gve/gve_rx_dqo.c | 12 +++++++-
 drivers/net/gve/gve_tx_dqo.c |  6 ++++
 4 files changed, 88 insertions(+), 1 deletion(-)

diff --git a/drivers/net/gve/gve_ethdev.c b/drivers/net/gve/gve_ethdev.c
index 89e3f09c37..fae00305f9 100644
--- a/drivers/net/gve/gve_ethdev.c
+++ b/drivers/net/gve/gve_ethdev.c
@@ -369,6 +369,64 @@ gve_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 	return 0;
 }
 
+static int
+gve_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	uint16_t i;
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		struct gve_tx_queue *txq = dev->data->tx_queues[i];
+		if (txq == NULL)
+			continue;
+
+		stats->opackets += txq->packets;
+		stats->obytes += txq->bytes;
+		stats->oerrors += txq->errors;
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		struct gve_rx_queue *rxq = dev->data->rx_queues[i];
+		if (rxq == NULL)
+			continue;
+
+		stats->ipackets += rxq->packets;
+		stats->ibytes += rxq->bytes;
+		stats->ierrors += rxq->errors;
+		stats->rx_nombuf += rxq->no_mbufs;
+	}
+
+	return 0;
+}
+
+static int
+gve_dev_stats_reset(struct rte_eth_dev *dev)
+{
+	uint16_t i;
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		struct gve_tx_queue *txq = dev->data->tx_queues[i];
+		if (txq == NULL)
+			continue;
+
+		txq->packets  = 0;
+		txq->bytes = 0;
+		txq->errors = 0;
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		struct gve_rx_queue *rxq = dev->data->rx_queues[i];
+		if (rxq == NULL)
+			continue;
+
+		rxq->packets  = 0;
+		rxq->bytes = 0;
+		rxq->errors = 0;
+		rxq->no_mbufs = 0;
+	}
+
+	return 0;
+}
+
 static int
 gve_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 {
@@ -407,6 +465,8 @@ static const struct eth_dev_ops gve_eth_dev_ops = {
 	.rx_queue_release     = gve_rx_queue_release,
 	.tx_queue_release     = gve_tx_queue_release,
 	.link_update          = gve_link_update,
+	.stats_get            = gve_dev_stats_get,
+	.stats_reset          = gve_dev_stats_reset,
 	.mtu_set              = gve_dev_mtu_set,
 };
 
diff --git a/drivers/net/gve/gve_ethdev.h b/drivers/net/gve/gve_ethdev.h
index d434f9babe..2e0f96499d 100644
--- a/drivers/net/gve/gve_ethdev.h
+++ b/drivers/net/gve/gve_ethdev.h
@@ -105,6 +105,11 @@ struct gve_tx_queue {
 	struct gve_queue_page_list *qpl;
 	struct gve_tx_iovec *iov_ring;
 
+	/* stats items */
+	uint64_t packets;
+	uint64_t bytes;
+	uint64_t errors;
+
 	uint16_t port_id;
 	uint16_t queue_id;
 
@@ -156,6 +161,12 @@ struct gve_rx_queue {
 	/* only valid for GQI_QPL queue format */
 	struct gve_queue_page_list *qpl;
 
+	/* stats items */
+	uint64_t packets;
+	uint64_t bytes;
+	uint64_t errors;
+	uint64_t no_mbufs;
+
 	struct gve_priv *hw;
 	const struct rte_memzone *qres_mz;
 	struct gve_queue_resources *qres;
diff --git a/drivers/net/gve/gve_rx_dqo.c b/drivers/net/gve/gve_rx_dqo.c
index 244517ce5d..41ead5bd98 100644
--- a/drivers/net/gve/gve_rx_dqo.c
+++ b/drivers/net/gve/gve_rx_dqo.c
@@ -37,6 +37,7 @@ gve_rx_refill_dqo(struct gve_rx_queue *rxq)
 			next_avail = 0;
 			rxq->nb_rx_hold -= delta;
 		} else {
+			rxq->no_mbufs += nb_desc - next_avail;
 			dev = &rte_eth_devices[rxq->port_id];
 			dev->data->rx_mbuf_alloc_failed += nb_desc - next_avail;
 			PMD_DRV_LOG(DEBUG, "RX mbuf alloc failed port_id=%u queue_id=%u",
@@ -57,6 +58,7 @@ gve_rx_refill_dqo(struct gve_rx_queue *rxq)
 			next_avail += nb_refill;
 			rxq->nb_rx_hold -= nb_refill;
 		} else {
+			rxq->no_mbufs += nb_desc - next_avail;
 			dev = &rte_eth_devices[rxq->port_id];
 			dev->data->rx_mbuf_alloc_failed += nb_desc - next_avail;
 			PMD_DRV_LOG(DEBUG, "RX mbuf alloc failed port_id=%u queue_id=%u",
@@ -80,7 +82,9 @@ gve_rx_burst_dqo(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 	uint16_t pkt_len;
 	uint16_t rx_id;
 	uint16_t nb_rx;
+	uint64_t bytes;
 
+	bytes = 0;
 	nb_rx = 0;
 	rxq = rx_queue;
 	rx_id = rxq->rx_tail;
@@ -94,8 +98,10 @@ gve_rx_burst_dqo(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 		if (rx_desc->generation != rxq->cur_gen_bit)
 			break;
 
-		if (unlikely(rx_desc->rx_error))
+		if (unlikely(rx_desc->rx_error)) {
+			rxq->errors++;
 			continue;
+		}
 
 		pkt_len = rx_desc->packet_len;
 
@@ -120,6 +126,7 @@ gve_rx_burst_dqo(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 		rxm->hash.rss = rte_be_to_cpu_32(rx_desc->hash);
 
 		rx_pkts[nb_rx++] = rxm;
+		bytes += pkt_len;
 	}
 
 	if (nb_rx > 0) {
@@ -128,6 +135,9 @@ gve_rx_burst_dqo(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 			rxq->next_avail = rx_id_bufq;
 
 		gve_rx_refill_dqo(rxq);
+
+		rxq->packets += nb_rx;
+		rxq->bytes += bytes;
 	}
 
 	return nb_rx;
diff --git a/drivers/net/gve/gve_tx_dqo.c b/drivers/net/gve/gve_tx_dqo.c
index 3583c82246..9c1361c894 100644
--- a/drivers/net/gve/gve_tx_dqo.c
+++ b/drivers/net/gve/gve_tx_dqo.c
@@ -80,10 +80,12 @@ gve_tx_burst_dqo(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 	uint16_t nb_used;
 	uint16_t tx_id;
 	uint16_t sw_id;
+	uint64_t bytes;
 
 	sw_ring = txq->sw_ring;
 	txr = txq->tx_ring;
 
+	bytes = 0;
 	mask = txq->nb_tx_desc - 1;
 	sw_mask = txq->sw_size - 1;
 	tx_id = txq->tx_tail;
@@ -118,6 +120,7 @@ gve_tx_burst_dqo(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 			tx_id = (tx_id + 1) & mask;
 			sw_id = (sw_id + 1) & sw_mask;
 
+			bytes += tx_pkt->pkt_len;
 			tx_pkt = tx_pkt->next;
 		} while (tx_pkt);
 
@@ -141,6 +144,9 @@ gve_tx_burst_dqo(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 		rte_write32(tx_id, txq->qtx_tail);
 		txq->tx_tail = tx_id;
 		txq->sw_tail = sw_id;
+
+		txq->packets += nb_tx;
+		txq->bytes += bytes;
 	}
 
 	return nb_tx;
-- 
2.34.1