nfp: register ports as devlink ports

Extend nfp_port to contain devlink_port structures.  Register the
ports to allow users inspecting device ports.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -31,9 +31,54 @@
  * SOFTWARE.
  */
 
+#include <linux/rtnetlink.h>
 #include <net/devlink.h>
 
+#include "nfpcore/nfp_nsp.h"
+#include "nfp_app.h"
 #include "nfp_main.h"
+#include "nfp_port.h"
+
+static int
+nfp_devlink_fill_eth_port(struct nfp_port *port,
+			  struct nfp_eth_table_port *copy)
+{
+	struct nfp_eth_table_port *eth_port;
+
+	eth_port = __nfp_port_get_eth_port(port);
+	if (!eth_port)
+		return -EINVAL;
+
+	memcpy(copy, eth_port, sizeof(*eth_port));
+
+	return 0;
+}
 
 const struct devlink_ops nfp_devlink_ops = {
 };
+
+int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port)
+{
+	struct nfp_eth_table_port eth_port;
+	struct devlink *devlink;
+	int ret;
+
+	rtnl_lock();
+	ret = nfp_devlink_fill_eth_port(port, &eth_port);
+	rtnl_unlock();
+	if (ret)
+		return ret;
+
+	devlink_port_type_eth_set(&port->dl_port, port->netdev);
+	if (eth_port.is_split)
+		devlink_port_split_set(&port->dl_port, eth_port.label_port);
+
+	devlink = priv_to_devlink(app->pf);
+
+	return devlink_port_register(devlink, &port->dl_port, port->eth_id);
+}
+
+void nfp_devlink_port_unregister(struct nfp_port *port)
+{
+	devlink_port_unregister(&port->dl_port);
+}

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

@@ -354,9 +354,20 @@ nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
 
 	nfp_net_debugfs_vnic_add(nn, pf->ddir, id);
 
+	if (nn->port) {
+		err = nfp_devlink_port_register(pf->app, nn->port);
+		if (err)
+			goto err_dfs_clean;
+	}
+
 	nfp_net_info(nn);
 
 	return 0;
+
+err_dfs_clean:
+	nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
+	nfp_net_clean(nn);
+	return err;
 }
 
 static int
@@ -420,6 +431,8 @@ nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
 
 static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
 {
+	if (nn->port)
+		nfp_devlink_port_unregister(nn->port);
 	nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
 	nfp_net_clean(nn);
 }

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

@@ -34,6 +34,8 @@
 #ifndef _NFP_PORT_H_
 #define _NFP_PORT_H_
 
+#include <net/devlink.h>
+
 struct net_device;
 struct nfp_app;
 struct nfp_port;
@@ -66,6 +68,7 @@ enum nfp_port_flags {
  * @type:	what port type does the entity represent
  * @flags:	port flags
  * @app:	backpointer to the app structure
+ * @dl_port:	devlink port structure
  * @eth_id:	for %NFP_PORT_PHYS_PORT port ID in NFP enumeration scheme
  * @eth_port:	for %NFP_PORT_PHYS_PORT translated ETH Table port entry
  * @port_list:	entry on pf's list of ports
@@ -78,6 +81,8 @@ struct nfp_port {
 
 	struct nfp_app *app;
 
+	struct devlink_port dl_port;
+
 	unsigned int eth_id;
 	struct nfp_eth_table_port *eth_port;
 
@@ -99,4 +104,7 @@ void nfp_port_free(struct nfp_port *port);
 int nfp_net_refresh_eth_port(struct nfp_port *port);
 void nfp_net_refresh_port_table(struct nfp_port *port);
 
+int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port);
+void nfp_devlink_port_unregister(struct nfp_port *port);
+
 #endif