mlx5: add support for page_pool_get_stats

This change adds support for the page_pool_get_stats API to mlx5. If the
user has enabled CONFIG_PAGE_POOL_STATS in their kernel, ethtool will
output page pool stats.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Acked-by: Saeed Mahameed <saeed@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/en_stats.c

@@ -37,6 +37,10 @@
 #include "en/ptp.h"
 #include "en/port.h"
 
+#ifdef CONFIG_PAGE_POOL_STATS
+#include <net/page_pool.h>
+#endif
+
 static unsigned int stats_grps_num(struct mlx5e_priv *priv)
 {
 	return !priv->profile->stats_grps_num ? 0 :
@@ -183,6 +187,19 @@ static const struct counter_desc sw_stats_desc[] = {
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_congst_umr) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_arfs_err) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_recover) },
+#ifdef CONFIG_PAGE_POOL_STATS
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_alloc_fast) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_alloc_slow) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_alloc_slow_high_order) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_alloc_empty) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_alloc_refill) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_alloc_waive) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_recycle_cached) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_recycle_cache_full) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_recycle_ring) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_recycle_ring_full) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_pp_recycle_released_ref) },
+#endif
 #ifdef CONFIG_MLX5_EN_TLS
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_tls_decrypted_packets) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_tls_decrypted_bytes) },
@@ -349,6 +366,19 @@ static void mlx5e_stats_grp_sw_update_stats_rq_stats(struct mlx5e_sw_stats *s,
 	s->rx_congst_umr              += rq_stats->congst_umr;
 	s->rx_arfs_err                += rq_stats->arfs_err;
 	s->rx_recover                 += rq_stats->recover;
+#ifdef CONFIG_PAGE_POOL_STATS
+	s->rx_pp_alloc_fast          += rq_stats->pp_alloc_fast;
+	s->rx_pp_alloc_slow          += rq_stats->pp_alloc_slow;
+	s->rx_pp_alloc_empty         += rq_stats->pp_alloc_empty;
+	s->rx_pp_alloc_refill        += rq_stats->pp_alloc_refill;
+	s->rx_pp_alloc_waive         += rq_stats->pp_alloc_waive;
+	s->rx_pp_alloc_slow_high_order		+= rq_stats->pp_alloc_slow_high_order;
+	s->rx_pp_recycle_cached			+= rq_stats->pp_recycle_cached;
+	s->rx_pp_recycle_cache_full		+= rq_stats->pp_recycle_cache_full;
+	s->rx_pp_recycle_ring			+= rq_stats->pp_recycle_ring;
+	s->rx_pp_recycle_ring_full		+= rq_stats->pp_recycle_ring_full;
+	s->rx_pp_recycle_released_ref		+= rq_stats->pp_recycle_released_ref;
+#endif
 #ifdef CONFIG_MLX5_EN_TLS
 	s->rx_tls_decrypted_packets   += rq_stats->tls_decrypted_packets;
 	s->rx_tls_decrypted_bytes     += rq_stats->tls_decrypted_bytes;
@@ -455,6 +485,35 @@ static void mlx5e_stats_grp_sw_update_stats_qos(struct mlx5e_priv *priv,
 	}
 }
 
+#ifdef CONFIG_PAGE_POOL_STATS
+static void mlx5e_stats_update_stats_rq_page_pool(struct mlx5e_channel *c)
+{
+	struct mlx5e_rq_stats *rq_stats = c->rq.stats;
+	struct page_pool *pool = c->rq.page_pool;
+	struct page_pool_stats stats = { 0 };
+
+	if (!page_pool_get_stats(pool, &stats))
+		return;
+
+	rq_stats->pp_alloc_fast = stats.alloc_stats.fast;
+	rq_stats->pp_alloc_slow = stats.alloc_stats.slow;
+	rq_stats->pp_alloc_slow_high_order = stats.alloc_stats.slow_high_order;
+	rq_stats->pp_alloc_empty = stats.alloc_stats.empty;
+	rq_stats->pp_alloc_waive = stats.alloc_stats.waive;
+	rq_stats->pp_alloc_refill = stats.alloc_stats.refill;
+
+	rq_stats->pp_recycle_cached = stats.recycle_stats.cached;
+	rq_stats->pp_recycle_cache_full = stats.recycle_stats.cache_full;
+	rq_stats->pp_recycle_ring = stats.recycle_stats.ring;
+	rq_stats->pp_recycle_ring_full = stats.recycle_stats.ring_full;
+	rq_stats->pp_recycle_released_ref = stats.recycle_stats.released_refcnt;
+}
+#else
+static void mlx5e_stats_update_stats_rq_page_pool(struct mlx5e_channel *c)
+{
+}
+#endif
+
 static MLX5E_DECLARE_STATS_GRP_OP_UPDATE_STATS(sw)
 {
 	struct mlx5e_sw_stats *s = &priv->stats.sw;
@@ -465,8 +524,11 @@ static MLX5E_DECLARE_STATS_GRP_OP_UPDATE_STATS(sw)
 	for (i = 0; i < priv->stats_nch; i++) {
 		struct mlx5e_channel_stats *channel_stats =
 			priv->channel_stats[i];
+
 		int j;
 
+		mlx5e_stats_update_stats_rq_page_pool(priv->channels.c[i]);
+
 		mlx5e_stats_grp_sw_update_stats_rq_stats(s, &channel_stats->rq);
 		mlx5e_stats_grp_sw_update_stats_xdpsq(s, &channel_stats->rq_xdpsq);
 		mlx5e_stats_grp_sw_update_stats_ch_stats(s, &channel_stats->ch);
@@ -1887,6 +1949,19 @@ static const struct counter_desc rq_stats_desc[] = {
 	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, congst_umr) },
 	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, arfs_err) },
 	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, recover) },
+#ifdef CONFIG_PAGE_POOL_STATS
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_alloc_fast) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_alloc_slow) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_alloc_slow_high_order) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_alloc_empty) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_alloc_refill) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_alloc_waive) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_recycle_cached) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_recycle_cache_full) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_recycle_ring) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_recycle_ring_full) },
+	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, pp_recycle_released_ref) },
+#endif
 #ifdef CONFIG_MLX5_EN_TLS
 	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, tls_decrypted_packets) },
 	{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, tls_decrypted_bytes) },

drivers/net/ethernet/mellanox/mlx5/core/en_stats.h

@@ -205,7 +205,19 @@ struct mlx5e_sw_stats {
 	u64 ch_aff_change;
 	u64 ch_force_irq;
 	u64 ch_eq_rearm;
-
+#ifdef CONFIG_PAGE_POOL_STATS
+	u64 rx_pp_alloc_fast;
+	u64 rx_pp_alloc_slow;
+	u64 rx_pp_alloc_slow_high_order;
+	u64 rx_pp_alloc_empty;
+	u64 rx_pp_alloc_refill;
+	u64 rx_pp_alloc_waive;
+	u64 rx_pp_recycle_cached;
+	u64 rx_pp_recycle_cache_full;
+	u64 rx_pp_recycle_ring;
+	u64 rx_pp_recycle_ring_full;
+	u64 rx_pp_recycle_released_ref;
+#endif
 #ifdef CONFIG_MLX5_EN_TLS
 	u64 tx_tls_encrypted_packets;
 	u64 tx_tls_encrypted_bytes;
@@ -352,6 +364,19 @@ struct mlx5e_rq_stats {
 	u64 congst_umr;
 	u64 arfs_err;
 	u64 recover;
+#ifdef CONFIG_PAGE_POOL_STATS
+	u64 pp_alloc_fast;
+	u64 pp_alloc_slow;
+	u64 pp_alloc_slow_high_order;
+	u64 pp_alloc_empty;
+	u64 pp_alloc_refill;
+	u64 pp_alloc_waive;
+	u64 pp_recycle_cached;
+	u64 pp_recycle_cache_full;
+	u64 pp_recycle_ring;
+	u64 pp_recycle_ring_full;
+	u64 pp_recycle_released_ref;
+#endif
 #ifdef CONFIG_MLX5_EN_TLS
 	u64 tls_decrypted_packets;
 	u64 tls_decrypted_bytes;