[PATCH v2 net-next 11/26] sf100, sfx: implement generic XDP stats callbacks

[Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>]

Export 4 per-channel XDP counters for both sf100 and sfx drivers
using generic XDP stats infra.

Signed-off-by: Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>
---
 drivers/net/ethernet/sfc/ef100_netdev.c |  2 ++
 drivers/net/ethernet/sfc/efx.c          |  2 ++
 drivers/net/ethernet/sfc/efx_common.c   | 42 +++++++++++++++++++++++++
 drivers/net/ethernet/sfc/efx_common.h   |  3 ++
 4 files changed, 49 insertions(+)

diff --git a/drivers/net/ethernet/sfc/ef100_netdev.c b/drivers/net/ethernet/sfc/ef100_netdev.c
index 67fe44db6b61..0367f7e043d8 100644
--- a/drivers/net/ethernet/sfc/ef100_netdev.c
+++ b/drivers/net/ethernet/sfc/ef100_netdev.c
@@ -219,6 +219,8 @@ static const struct net_device_ops ef100_netdev_ops = {
 	.ndo_start_xmit         = ef100_hard_start_xmit,
 	.ndo_tx_timeout         = efx_watchdog,
 	.ndo_get_stats64        = efx_net_stats,
+	.ndo_get_xdp_stats_nch  = efx_get_xdp_stats_nch,
+	.ndo_get_xdp_stats      = efx_get_xdp_stats,
 	.ndo_change_mtu         = efx_change_mtu,
 	.ndo_validate_addr      = eth_validate_addr,
 	.ndo_set_mac_address    = efx_set_mac_address,
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index a8c252e2b252..a6a015c4d3b4 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -588,6 +588,8 @@ static const struct net_device_ops efx_netdev_ops = {
 	.ndo_open		= efx_net_open,
 	.ndo_stop		= efx_net_stop,
 	.ndo_get_stats64	= efx_net_stats,
+	.ndo_get_xdp_stats_nch	= efx_get_xdp_stats_nch,
+	.ndo_get_xdp_stats	= efx_get_xdp_stats,
 	.ndo_tx_timeout		= efx_watchdog,
 	.ndo_start_xmit		= efx_hard_start_xmit,
 	.ndo_validate_addr	= eth_validate_addr,
diff --git a/drivers/net/ethernet/sfc/efx_common.c b/drivers/net/ethernet/sfc/efx_common.c
index f187631b2c5c..c2bf79fd66b4 100644
--- a/drivers/net/ethernet/sfc/efx_common.c
+++ b/drivers/net/ethernet/sfc/efx_common.c
@@ -606,6 +606,48 @@ void efx_net_stats(struct net_device *net_dev, struct rtnl_link_stats64 *stats)
 	spin_unlock_bh(&efx->stats_lock);
 }

+int efx_get_xdp_stats_nch(const struct net_device *net_dev, u32 attr_id)
+{
+	const struct efx_nic *efx = netdev_priv(net_dev);
+
+	switch (attr_id) {
+	case IFLA_XDP_XSTATS_TYPE_XDP:
+		return efx->n_channels;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+int efx_get_xdp_stats(const struct net_device *net_dev, u32 attr_id,
+		      void *attr_data)
+{
+	struct ifla_xdp_stats *xdp_stats = attr_data;
+	struct efx_nic *efx = netdev_priv(net_dev);
+	const struct efx_channel *channel;
+
+	switch (attr_id) {
+	case IFLA_XDP_XSTATS_TYPE_XDP:
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	spin_lock_bh(&efx->stats_lock);
+
+	efx_for_each_channel(channel, efx) {
+		xdp_stats->drop = channel->n_rx_xdp_drops;
+		xdp_stats->errors = channel->n_rx_xdp_bad_drops;
+		xdp_stats->redirect = channel->n_rx_xdp_redirect;
+		xdp_stats->tx = channel->n_rx_xdp_tx;
+
+		xdp_stats++;
+	}
+
+	spin_unlock_bh(&efx->stats_lock);
+
+	return 0;
+}
+
 /* Push loopback/power/transmit disable settings to the PHY, and reconfigure
  * the MAC appropriately. All other PHY configuration changes are pushed
  * through phy_op->set_settings(), and pushed asynchronously to the MAC
diff --git a/drivers/net/ethernet/sfc/efx_common.h b/drivers/net/ethernet/sfc/efx_common.h
index 65513fd0cf6c..987d7c6608a2 100644
--- a/drivers/net/ethernet/sfc/efx_common.h
+++ b/drivers/net/ethernet/sfc/efx_common.h
@@ -32,6 +32,9 @@ void efx_start_all(struct efx_nic *efx);
 void efx_stop_all(struct efx_nic *efx);

 void efx_net_stats(struct net_device *net_dev, struct rtnl_link_stats64 *stats);
+int efx_get_xdp_stats_nch(const struct net_device *net_dev, u32 attr_id);
+int efx_get_xdp_stats(const struct net_device *net_dev, u32 attr_id,
+		      void *attr_data);

 int efx_create_reset_workqueue(void);
 void efx_queue_reset_work(struct efx_nic *efx);
--
2.33.1