net/gve: add Rx/Tx queue stats as extended stats

diff --git a/drivers/net/gve/gve_ethdev.c b/drivers/net/gve/gve_ethdev.c
index fef2458a16..8b6e4b1322 100644
--- a/drivers/net/gve/gve_ethdev.c
+++ b/drivers/net/gve/gve_ethdev.c
@@ -9,6 +9,18 @@ 
 const char gve_version_str[] = GVE_VERSION;
 static const char gve_version_prefix[] = GVE_VERSION_PREFIX;
 
+static const struct gve_xstats_name_offset tx_xstats_name_offset[] = {
+	{ "packets", offsetof(struct gve_tx_stats, packets) },
+	{ "bytes",   offsetof(struct gve_tx_stats, bytes) },
+	{ "errors",  offsetof(struct gve_tx_stats, errors) },
+};
+
+static const struct gve_xstats_name_offset rx_xstats_name_offset[] = {
+	{ "packets", offsetof(struct gve_rx_stats, packets) },
+	{ "bytes",   offsetof(struct gve_rx_stats, bytes) },
+	{ "errors",  offsetof(struct gve_rx_stats, errors) },
+};
+
 static void
 gve_write_version(uint8_t *driver_version_register)
 {
@@ -328,9 +340,9 @@  gve_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 		if (txq == NULL)
 			continue;
 
-		stats->opackets += txq->packets;
-		stats->obytes += txq->bytes;
-		stats->oerrors += txq->errors;
+		stats->opackets += txq->stats.packets;
+		stats->obytes += txq->stats.bytes;
+		stats->oerrors += txq->stats.errors;
 	}
 
 	for (i = 0; i < dev->data->nb_rx_queues; i++) {
@@ -338,10 +350,10 @@  gve_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 		if (rxq == NULL)
 			continue;
 
-		stats->ipackets += rxq->packets;
-		stats->ibytes += rxq->bytes;
-		stats->ierrors += rxq->errors;
-		stats->rx_nombuf += rxq->no_mbufs;
+		stats->ipackets += rxq->stats.packets;
+		stats->ibytes += rxq->stats.bytes;
+		stats->ierrors += rxq->stats.errors;
+		stats->rx_nombuf += rxq->stats.no_mbufs;
 	}
 
 	return 0;
@@ -357,9 +369,7 @@  gve_dev_stats_reset(struct rte_eth_dev *dev)
 		if (txq == NULL)
 			continue;
 
-		txq->packets  = 0;
-		txq->bytes = 0;
-		txq->errors = 0;
+		memset(&txq->stats, 0, sizeof(txq->stats));
 	}
 
 	for (i = 0; i < dev->data->nb_rx_queues; i++) {
@@ -367,10 +377,7 @@  gve_dev_stats_reset(struct rte_eth_dev *dev)
 		if (rxq == NULL)
 			continue;
 
-		rxq->packets  = 0;
-		rxq->bytes = 0;
-		rxq->errors = 0;
-		rxq->no_mbufs = 0;
+		memset(&rxq->stats, 0, sizeof(rxq->stats));
 	}
 
 	return 0;
@@ -403,6 +410,112 @@  gve_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 	return 0;
 }
 
+static int
+gve_xstats_count(struct rte_eth_dev *dev)
+{
+	uint16_t i, count = 0;
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		if (dev->data->tx_queues[i])
+			count += RTE_DIM(tx_xstats_name_offset);
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		if (dev->data->rx_queues[i])
+			count += RTE_DIM(rx_xstats_name_offset);
+	}
+
+	return count;
+}
+
+static int
+gve_xstats_get(struct rte_eth_dev *dev,
+			struct rte_eth_xstat *xstats,
+			unsigned int size)
+{
+	uint16_t i, count = 0;
+
+	if (!xstats)
+		return (size == 0) ? gve_xstats_count(dev) : -EINVAL;
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		const struct gve_tx_queue *txq = dev->data->tx_queues[i];
+		if (!txq)
+			continue;
+
+		if (count >= size)
+			break;
+
+		uint16_t j = 0;
+		const char *stats = (const char *)&txq->stats;
+		for (j = 0; j < RTE_DIM(tx_xstats_name_offset); j++, count++) {
+			xstats[count].id = count;
+			xstats[count].value = *(const uint64_t *)
+				(stats + tx_xstats_name_offset[j].offset);
+		}
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		const struct gve_rx_queue *rxq = dev->data->rx_queues[i];
+		if (!rxq)
+			continue;
+
+		if (count >= size)
+			break;
+
+		uint16_t j = 0;
+		const char *stats = (const char *)&rxq->stats;
+		for (j = 0; j < RTE_DIM(rx_xstats_name_offset); j++, count++) {
+			xstats[count].id = count;
+			xstats[count].value = *(const uint64_t *)
+				(stats + rx_xstats_name_offset[j].offset);
+		}
+	}
+
+	return count;
+}
+
+static int
+gve_xstats_get_names(struct rte_eth_dev *dev,
+			struct rte_eth_xstat_name *xstats_names,
+			unsigned int size)
+{
+	uint16_t i, count = 0;
+
+	if (!xstats_names)
+		return (size == 0) ? gve_xstats_count(dev) : -EINVAL;
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		if (!dev->data->tx_queues[i])
+			continue;
+
+		if (count >= size)
+			break;
+
+		uint16_t j = 0;
+		for (; j < RTE_DIM(tx_xstats_name_offset); j++)
+			snprintf(xstats_names[count++].name,
+				 RTE_ETH_XSTATS_NAME_SIZE,
+				 "tx_q%u_%s", i, tx_xstats_name_offset[j].name);
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		if (!dev->data->rx_queues[i])
+			continue;
+
+		if (count >= size)
+			break;
+
+		uint16_t j = 0;
+		for (; j < RTE_DIM(rx_xstats_name_offset); j++)
+			snprintf(xstats_names[count++].name,
+				 RTE_ETH_XSTATS_NAME_SIZE,
+				 "rx_q%u_%s", i, rx_xstats_name_offset[j].name);
+	}
+
+	return count;
+}
+
 static const struct eth_dev_ops gve_eth_dev_ops = {
 	.dev_configure        = gve_dev_configure,
 	.dev_start            = gve_dev_start,
@@ -417,6 +530,8 @@  static const struct eth_dev_ops gve_eth_dev_ops = {
 	.stats_get            = gve_dev_stats_get,
 	.stats_reset          = gve_dev_stats_reset,
 	.mtu_set              = gve_dev_mtu_set,
+	.xstats_get           = gve_xstats_get,
+	.xstats_get_names     = gve_xstats_get_names,
 };
 
 static void
diff --git a/drivers/net/gve/gve_ethdev.h b/drivers/net/gve/gve_ethdev.h
index 64e571bcae..bc351d808b 100644
--- a/drivers/net/gve/gve_ethdev.h
+++ b/drivers/net/gve/gve_ethdev.h
@@ -67,6 +67,24 @@  struct gve_tx_iovec {
 	uint32_t iov_len;
 };
 
+struct gve_tx_stats {
+	uint64_t packets;
+	uint64_t bytes;
+	uint64_t errors;
+};
+
+struct gve_rx_stats {
+	uint64_t packets;
+	uint64_t bytes;
+	uint64_t errors;
+	uint64_t no_mbufs;
+};
+
+struct gve_xstats_name_offset {
+	char name[RTE_ETH_XSTATS_NAME_SIZE];
+	unsigned int offset;
+};
+
 struct gve_tx_queue {
 	volatile union gve_tx_desc *tx_desc_ring;
 	const struct rte_memzone *mz;
@@ -93,9 +111,7 @@  struct gve_tx_queue {
 	struct gve_tx_iovec *iov_ring;
 
 	/* stats items */
-	uint64_t packets;
-	uint64_t bytes;
-	uint64_t errors;
+	struct gve_tx_stats stats;
 
 	uint16_t port_id;
 	uint16_t queue_id;
@@ -136,10 +152,7 @@  struct gve_rx_queue {
 	struct gve_queue_page_list *qpl;
 
 	/* stats items */
-	uint64_t packets;
-	uint64_t bytes;
-	uint64_t errors;
-	uint64_t no_mbufs;
+	struct gve_rx_stats stats;
 
 	struct gve_priv *hw;
 	const struct rte_memzone *qres_mz;
diff --git a/drivers/net/gve/gve_rx.c b/drivers/net/gve/gve_rx.c
index d346efa57c..b52f924689 100644
--- a/drivers/net/gve/gve_rx.c
+++ b/drivers/net/gve/gve_rx.c
@@ -27,7 +27,7 @@  gve_rx_refill(struct gve_rx_queue *rxq)
 				rxq->sw_ring[idx + i] = nmb;
 			}
 			if (i != nb_alloc) {
-				rxq->no_mbufs += nb_alloc - i;
+				rxq->stats.no_mbufs += nb_alloc - i;
 				nb_alloc = i;
 			}
 		}
@@ -62,7 +62,7 @@  gve_rx_refill(struct gve_rx_queue *rxq)
 				rxq->sw_ring[idx + i] = nmb;
 			}
 			if (i != nb_alloc) {
-				rxq->no_mbufs += nb_alloc - i;
+				rxq->stats.no_mbufs += nb_alloc - i;
 				nb_alloc = i;
 			}
 		}
@@ -106,7 +106,7 @@  gve_rx_burst(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 			break;
 
 		if (rxd->flags_seq & GVE_RXF_ERR) {
-			rxq->errors++;
+			rxq->stats.errors++;
 			continue;
 		}
 
@@ -154,8 +154,8 @@  gve_rx_burst(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 		gve_rx_refill(rxq);
 
 	if (nb_rx) {
-		rxq->packets += nb_rx;
-		rxq->bytes += bytes;
+		rxq->stats.packets += nb_rx;
+		rxq->stats.bytes += bytes;
 	}
 
 	return nb_rx;
diff --git a/drivers/net/gve/gve_tx.c b/drivers/net/gve/gve_tx.c
index 9b41c59358..fee3b939c7 100644
--- a/drivers/net/gve/gve_tx.c
+++ b/drivers/net/gve/gve_tx.c
@@ -366,9 +366,9 @@  gve_tx_burst_qpl(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 		txq->tx_tail = tx_tail;
 		txq->sw_tail = sw_id;
 
-		txq->packets += nb_tx;
-		txq->bytes += bytes;
-		txq->errors += nb_pkts - nb_tx;
+		txq->stats.packets += nb_tx;
+		txq->stats.bytes += bytes;
+		txq->stats.errors += nb_pkts - nb_tx;
 	}
 
 	return nb_tx;
@@ -455,8 +455,9 @@  gve_tx_burst_ra(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 		rte_write32(rte_cpu_to_be_32(tx_tail), txq->qtx_tail);
 		txq->tx_tail = tx_tail;
 
-		txq->packets += nb_tx;
-		txq->bytes += bytes;
+		txq->stats.packets += nb_tx;
+		txq->stats.bytes += bytes;
+		txq->stats.errors += nb_pkts - nb_tx;
 	}
 
 	return nb_tx;