nfp: allow apps to add extra stats to ports

Allow nfp apps to add extra ethtool stats.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/nfp_app.c

@@ -43,6 +43,7 @@
 #include "nfp_main.h"
 #include "nfp_net.h"
 #include "nfp_net_repr.h"
+#include "nfp_port.h"
 
 static const struct nfp_app_type *apps[] = {
 	[NFP_APP_CORE_NIC]	= &app_nic,
@@ -85,6 +86,27 @@ const char *nfp_app_mip_name(struct nfp_app *app)
 	return nfp_mip_name(app->pf->mip);
 }
 
+u64 *nfp_app_port_get_stats(struct nfp_port *port, u64 *data)
+{
+	if (!port || !port->app || !port->app->type->port_get_stats)
+		return data;
+	return port->app->type->port_get_stats(port->app, port, data);
+}
+
+int nfp_app_port_get_stats_count(struct nfp_port *port)
+{
+	if (!port || !port->app || !port->app->type->port_get_stats_count)
+		return 0;
+	return port->app->type->port_get_stats_count(port->app, port);
+}
+
+u8 *nfp_app_port_get_stats_strings(struct nfp_port *port, u8 *data)
+{
+	if (!port || !port->app || !port->app->type->port_get_stats_strings)
+		return data;
+	return port->app->type->port_get_stats_strings(port->app, port, data);
+}
+
 struct sk_buff *
 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority)
 {

drivers/net/ethernet/netronome/nfp/nfp_app.h

@@ -90,6 +90,9 @@ extern const struct nfp_app_type app_abm;
  * @repr_stop:	representor netdev stop callback
  * @check_mtu:	MTU change request on a netdev (verify it is valid)
  * @repr_change_mtu:	MTU change request on repr (make and verify change)
+ * @port_get_stats:		get extra ethtool statistics for a port
+ * @port_get_stats_count:	get count of extra statistics for a port
+ * @port_get_stats_strings:	get strings for extra statistics
  * @start:	start application logic
  * @stop:	stop application logic
  * @ctrl_msg_rx:    control message handler
@@ -132,6 +135,12 @@ struct nfp_app_type {
 	int (*repr_change_mtu)(struct nfp_app *app, struct net_device *netdev,
 			       int new_mtu);
 
+	u64 *(*port_get_stats)(struct nfp_app *app,
+			       struct nfp_port *port, u64 *data);
+	int (*port_get_stats_count)(struct nfp_app *app, struct nfp_port *port);
+	u8 *(*port_get_stats_strings)(struct nfp_app *app,
+				      struct nfp_port *port, u8 *data);
+
 	int (*start)(struct nfp_app *app);
 	void (*stop)(struct nfp_app *app);
 
@@ -404,6 +413,10 @@ static inline struct net_device *nfp_app_repr_get(struct nfp_app *app, u32 id)
 
 struct nfp_app *nfp_app_from_netdev(struct net_device *netdev);
 
+u64 *nfp_app_port_get_stats(struct nfp_port *port, u64 *data);
+int nfp_app_port_get_stats_count(struct nfp_port *port);
+u8 *nfp_app_port_get_stats_strings(struct nfp_port *port, u8 *data);
+
 struct nfp_reprs *
 nfp_reprs_get_locked(struct nfp_app *app, enum nfp_repr_type type);
 struct nfp_reprs *

drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c

@@ -437,7 +437,7 @@ static int nfp_net_set_ringparam(struct net_device *netdev,
 	return nfp_net_set_ring_size(nn, rxd_cnt, txd_cnt);
 }
 
-static __printf(2, 3) u8 *nfp_pr_et(u8 *data, const char *fmt, ...)
+__printf(2, 3) u8 *nfp_pr_et(u8 *data, const char *fmt, ...)
 {
 	va_list args;
 
@@ -637,6 +637,7 @@ static void nfp_net_get_strings(struct net_device *netdev,
 						     nn->dp.num_tx_rings,
 						     false);
 		data = nfp_mac_get_stats_strings(netdev, data);
+		data = nfp_app_port_get_stats_strings(nn->port, data);
 		break;
 	}
 }
@@ -651,6 +652,7 @@ nfp_net_get_stats(struct net_device *netdev, struct ethtool_stats *stats,
 	data = nfp_vnic_get_hw_stats(data, nn->dp.ctrl_bar,
 				     nn->dp.num_rx_rings, nn->dp.num_tx_rings);
 	data = nfp_mac_get_stats(netdev, data);
+	data = nfp_app_port_get_stats(nn->port, data);
 }
 
 static int nfp_net_get_sset_count(struct net_device *netdev, int sset)
@@ -662,7 +664,8 @@ static int nfp_net_get_sset_count(struct net_device *netdev, int sset)
 		return nfp_vnic_get_sw_stats_count(netdev) +
 		       nfp_vnic_get_hw_stats_count(nn->dp.num_rx_rings,
 						   nn->dp.num_tx_rings) +
-		       nfp_mac_get_stats_count(netdev);
+		       nfp_mac_get_stats_count(netdev) +
+		       nfp_app_port_get_stats_count(nn->port);
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -679,6 +682,7 @@ static void nfp_port_get_strings(struct net_device *netdev,
 			data = nfp_vnic_get_hw_stats_strings(data, 0, 0, true);
 		else
 			data = nfp_mac_get_stats_strings(netdev, data);
+		data = nfp_app_port_get_stats_strings(port, data);
 		break;
 	}
 }
@@ -693,6 +697,7 @@ nfp_port_get_stats(struct net_device *netdev, struct ethtool_stats *stats,
 		data = nfp_vnic_get_hw_stats(data, port->vnic, 0, 0);
 	else
 		data = nfp_mac_get_stats(netdev, data);
+	data = nfp_app_port_get_stats(port, data);
 }
 
 static int nfp_port_get_sset_count(struct net_device *netdev, int sset)
@@ -706,6 +711,7 @@ static int nfp_port_get_sset_count(struct net_device *netdev, int sset)
 			count = nfp_vnic_get_hw_stats_count(0, 0);
 		else
 			count = nfp_mac_get_stats_count(netdev);
+		count += nfp_app_port_get_stats_count(port);
 		return count;
 	default:
 		return -EOPNOTSUPP;

drivers/net/ethernet/netronome/nfp/nfp_port.h

@@ -122,6 +122,8 @@ struct nfp_port {
 extern const struct ethtool_ops nfp_port_ethtool_ops;
 extern const struct switchdev_ops nfp_port_switchdev_ops;
 
+__printf(2, 3) u8 *nfp_pr_et(u8 *data, const char *fmt, ...);
+
 int nfp_port_setup_tc(struct net_device *netdev, enum tc_setup_type type,
 		      void *type_data);