nfp: assign vNIC id as phys_port_name of vNICs which are not ports

When NFP is modelled as a switch we assign phys_port_name to respective
port(representor )s:

 vNIC0 - | - PF port (pf%d)     MAC/PHY (p%d[s%d]) - |E==

In most cases there is only one vNIC for communication with the switch.
If there is more than one we need to be able to identify them.  Use %d
as phys_port_name of the vNICs.

We don't have to pass ID to nfp_net_debugfs_vnic_add() separately any
more.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -545,6 +545,7 @@ struct nfp_net_dp {
 /**
  * struct nfp_net - NFP network device structure
  * @dp:			Datapath structure
+ * @id:			vNIC id within the PF (0 for VFs)
  * @fw_ver:		Firmware version
  * @cap:                Capabilities advertised by the Firmware
  * @max_mtu:            Maximum support MTU advertised by the Firmware
@@ -597,6 +598,8 @@ struct nfp_net {
 
 	struct nfp_net_fw_version fw_ver;
 
+	u32 id;
+
 	u32 cap;
 	u32 max_mtu;
 
@@ -909,7 +912,7 @@ int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new,
 void nfp_net_debugfs_create(void);
 void nfp_net_debugfs_destroy(void);
 struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev);
-void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id);
+void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir);
 void nfp_net_debugfs_dir_clean(struct dentry **dir);
 #else
 static inline void nfp_net_debugfs_create(void)
@@ -926,7 +929,7 @@ static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)
 }
 
 static inline void
-nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id)
+nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir)
 {
 }
 

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

@@ -3277,6 +3277,24 @@ nfp_net_features_check(struct sk_buff *skb, struct net_device *dev,
 	return features;
 }
 
+static int
+nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
+{
+	struct nfp_net *nn = netdev_priv(netdev);
+	int n;
+
+	if (nn->port)
+		return nfp_port_get_phys_port_name(netdev, name, len);
+
+	if (!nn->dp.is_vf) {
+		n = snprintf(name, len, "%d", nn->id);
+		if (n >= len)
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
 /**
  * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW
  * @nn:   NFP Net device to reconfigure
@@ -3475,7 +3493,7 @@ const struct net_device_ops nfp_net_netdev_ops = {
 	.ndo_set_mac_address	= nfp_net_set_mac_address,
 	.ndo_set_features	= nfp_net_set_features,
 	.ndo_features_check	= nfp_net_features_check,
-	.ndo_get_phys_port_name	= nfp_port_get_phys_port_name,
+	.ndo_get_phys_port_name	= nfp_net_get_phys_port_name,
 	.ndo_udp_tunnel_add	= nfp_net_add_vxlan_port,
 	.ndo_udp_tunnel_del	= nfp_net_del_vxlan_port,
 	.ndo_bpf		= nfp_net_xdp,

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

@@ -201,7 +201,7 @@ static const struct file_operations nfp_xdp_q_fops = {
 	.llseek = seq_lseek
 };
 
-void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id)
+void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir)
 {
 	struct dentry *queues, *tx, *rx, *xdp;
 	char name[20];
@@ -211,7 +211,7 @@ void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id)
 		return;
 
 	if (nfp_net_is_data_vnic(nn))
-		sprintf(name, "vnic%d", id);
+		sprintf(name, "vnic%d", nn->id);
 	else
 		strcpy(name, "ctrl-vnic");
 	nn->debugfs_dir = debugfs_create_dir(name, ddir);

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

@@ -178,11 +178,13 @@ nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
 {
 	int err;
 
+	nn->id = id;
+
 	err = nfp_net_init(nn);
 	if (err)
 		return err;
 
-	nfp_net_debugfs_vnic_add(nn, pf->ddir, id);
+	nfp_net_debugfs_vnic_add(nn, pf->ddir);
 
 	if (nn->port) {
 		err = nfp_devlink_port_register(pf->app, nn->port);

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

@@ -283,7 +283,7 @@ static int nfp_netvf_pci_probe(struct pci_dev *pdev,
 
 	nfp_net_info(nn);
 	vf->ddir = nfp_net_debugfs_device_add(pdev);
-	nfp_net_debugfs_vnic_add(nn, vf->ddir, 0);
+	nfp_net_debugfs_vnic_add(nn, vf->ddir);
 
 	return 0;