[PATCH v2 net-next 05/26] enetc: implement generic XDP stats callbacks

[Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>]

Similarly to dpaa2, enetc stores 5 per-channel counters for XDP.
Add necessary callbacks to be able to access them using new generic
XDP stats infra.

Signed-off-by: Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>
---
 drivers/net/ethernet/freescale/enetc/enetc.c  | 48 +++++++++++++++++++
 drivers/net/ethernet/freescale/enetc/enetc.h  |  3 ++
 .../net/ethernet/freescale/enetc/enetc_pf.c   |  2 +
 3 files changed, 53 insertions(+)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c
index 504e12554079..ec62765377a7 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -2575,6 +2575,54 @@ struct net_device_stats *enetc_get_stats(struct net_device *ndev)
 	return stats;
 }

+int enetc_get_xdp_stats_nch(const struct net_device *ndev, u32 attr_id)
+{
+	const struct enetc_ndev_priv *priv = netdev_priv(ndev);
+
+	switch (attr_id) {
+	case IFLA_XDP_XSTATS_TYPE_XDP:
+		return max(priv->num_rx_rings, priv->num_tx_rings);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+int enetc_get_xdp_stats(const struct net_device *ndev, u32 attr_id,
+			void *attr_data)
+{
+	struct ifla_xdp_stats *xdp_iter, *xdp_stats = attr_data;
+	const struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	const struct enetc_ring_stats *stats;
+	u32 i;
+
+	switch (attr_id) {
+	case IFLA_XDP_XSTATS_TYPE_XDP:
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	for (i = 0; i < priv->num_tx_rings; i++) {
+		stats = &priv->tx_ring[i]->stats;
+		xdp_iter = xdp_stats + i;
+
+		xdp_iter->tx = stats->xdp_tx;
+		xdp_iter->tx_errors = stats->xdp_tx_drops;
+	}
+
+	for (i = 0; i < priv->num_rx_rings; i++) {
+		stats = &priv->rx_ring[i]->stats;
+		xdp_iter = xdp_stats + i;
+
+		xdp_iter->drop = stats->xdp_drops;
+		xdp_iter->redirect = stats->xdp_redirect;
+		xdp_iter->redirect_errors = stats->xdp_redirect_failures;
+		xdp_iter->redirect_errors += stats->xdp_redirect_sg;
+	}
+
+	return 0;
+}
+
 static int enetc_set_rss(struct net_device *ndev, int en)
 {
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h
index fb39e406b7fc..8f175f0194e3 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc.h
@@ -389,6 +389,9 @@ void enetc_start(struct net_device *ndev);
 void enetc_stop(struct net_device *ndev);
 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev);
 struct net_device_stats *enetc_get_stats(struct net_device *ndev);
+int enetc_get_xdp_stats_nch(const struct net_device *ndev, u32 attr_id);
+int enetc_get_xdp_stats(const struct net_device *ndev, u32 attr_id,
+			void *attr_data);
 int enetc_set_features(struct net_device *ndev,
 		       netdev_features_t features);
 int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd);
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
index fe6a544f37f0..c7776b842a91 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
@@ -729,6 +729,8 @@ static const struct net_device_ops enetc_ndev_ops = {
 	.ndo_stop		= enetc_close,
 	.ndo_start_xmit		= enetc_xmit,
 	.ndo_get_stats		= enetc_get_stats,
+	.ndo_get_xdp_stats_nch	= enetc_get_xdp_stats_nch,
+	.ndo_get_xdp_stats	= enetc_get_xdp_stats,
 	.ndo_set_mac_address	= enetc_pf_set_mac_addr,
 	.ndo_set_rx_mode	= enetc_pf_set_rx_mode,
 	.ndo_vlan_rx_add_vid	= enetc_vlan_rx_add_vid,
--
2.33.1