netdevsim: Implement VFs

Allow creation of netdevsim ports for VFs along with allocations of
corresponding net devices and devlink ports.
Add enums and helpers to distinguish PFs' ports from VFs' ports.

Ports creation/deletion debugfs API intended to be used with physical
ports only.
VFs instantiation will be done in one of the next patches.

Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 65 insertions, 25 deletions

diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
index 659d3dceb687..9352e18b4db9 100644
--- a/drivers/net/netdevsim/netdev.c
+++ b/drivers/net/netdevsim/netdev.c
@@ -261,6 +261,18 @@ static const struct net_device_ops nsim_netdev_ops = {
 	.ndo_get_devlink_port	= nsim_get_devlink_port,
 };
 
+static const struct net_device_ops nsim_vf_netdev_ops = {
+	.ndo_start_xmit		= nsim_start_xmit,
+	.ndo_set_rx_mode	= nsim_set_rx_mode,
+	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_change_mtu		= nsim_change_mtu,
+	.ndo_get_stats64	= nsim_get_stats64,
+	.ndo_setup_tc		= nsim_setup_tc,
+	.ndo_set_features	= nsim_set_features,
+	.ndo_get_devlink_port	= nsim_get_devlink_port,
+};
+
 static void nsim_setup(struct net_device *dev)
 {
 	ether_setup(dev);
@@ -280,6 +292,49 @@ static void nsim_setup(struct net_device *dev)
 	dev->max_mtu = ETH_MAX_MTU;
 }
 
+static int nsim_init_netdevsim(struct netdevsim *ns)
+{
+	int err;
+
+	ns->netdev->netdev_ops = &nsim_netdev_ops;
+
+	err = nsim_udp_tunnels_info_create(ns->nsim_dev, ns->netdev);
+	if (err)
+		return err;
+
+	rtnl_lock();
+	err = nsim_bpf_init(ns);
+	if (err)
+		goto err_utn_destroy;
+
+	nsim_ipsec_init(ns);
+
+	err = register_netdevice(ns->netdev);
+	if (err)
+		goto err_ipsec_teardown;
+	rtnl_unlock();
+	return 0;
+
+err_ipsec_teardown:
+	nsim_ipsec_teardown(ns);
+	nsim_bpf_uninit(ns);
+err_utn_destroy:
+	rtnl_unlock();
+	nsim_udp_tunnels_info_destroy(ns->netdev);
+	return err;
+}
+
+static int nsim_init_netdevsim_vf(struct netdevsim *ns)
+{
+	int err;
+
+	ns->netdev->netdev_ops = &nsim_vf_netdev_ops;
+	rtnl_lock();
+	err = register_netdevice(ns->netdev);
+	rtnl_unlock();
+	return err;
+}
+
 struct netdevsim *
 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
 {
@@ -299,33 +354,15 @@ nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
 	ns->nsim_dev_port = nsim_dev_port;
 	ns->nsim_bus_dev = nsim_dev->nsim_bus_dev;
 	SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
-	dev->netdev_ops = &nsim_netdev_ops;
 	nsim_ethtool_init(ns);
-
-	err = nsim_udp_tunnels_info_create(nsim_dev, dev);
+	if (nsim_dev_port_is_pf(nsim_dev_port))
+		err = nsim_init_netdevsim(ns);
+	else
+		err = nsim_init_netdevsim_vf(ns);
 	if (err)
 		goto err_free_netdev;
-
-	rtnl_lock();
-	err = nsim_bpf_init(ns);
-	if (err)
-		goto err_utn_destroy;
-
-	nsim_ipsec_init(ns);
-
-	err = register_netdevice(dev);
-	if (err)
-		goto err_ipsec_teardown;
-	rtnl_unlock();
-
 	return ns;
 
-err_ipsec_teardown:
-	nsim_ipsec_teardown(ns);
-	nsim_bpf_uninit(ns);
-err_utn_destroy:
-	rtnl_unlock();
-	nsim_udp_tunnels_info_destroy(dev);
 err_free_netdev:
 	free_netdev(dev);
 	return ERR_PTR(err);
@@ -337,10 +374,13 @@ void nsim_destroy(struct netdevsim *ns)
 
 	rtnl_lock();
 	unregister_netdevice(dev);
-	nsim_ipsec_teardown(ns);
-	nsim_bpf_uninit(ns);
+	if (nsim_dev_port_is_pf(ns->nsim_dev_port)) {
+		nsim_ipsec_teardown(ns);
+		nsim_bpf_uninit(ns);
+	}
 	rtnl_unlock();
-	nsim_udp_tunnels_info_destroy(dev);
+	if (nsim_dev_port_is_pf(ns->nsim_dev_port))
+		nsim_udp_tunnels_info_destroy(dev);
 	free_netdev(dev);
 }