Merge branch 'dsa-loop-Driver-updates'

Florian Fainelli says:

====================
net: dsa: loop: Driver updates

This patch series updates drivers/net/dsa/dsa_loop.c to provide more useful
coverage of the DSA APIs and how we mangle the CPU ports ethtool statistics
to include its switch-facing port counters.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/dsa_loop.c

@@ -14,6 +14,7 @@
 #include <linux/phy.h>
 #include <linux/phy_fixed.h>
 #include <linux/export.h>
+#include <linux/ethtool.h>
 #include <linux/workqueue.h>
 #include <linux/module.h>
 #include <linux/if_bridge.h>
@@ -26,13 +27,38 @@ struct dsa_loop_vlan {
 	u16 untagged;
 };
 
+struct dsa_loop_mib_entry {
+	char name[ETH_GSTRING_LEN];
+	unsigned long val;
+};
+
+enum dsa_loop_mib_counters {
+	DSA_LOOP_PHY_READ_OK,
+	DSA_LOOP_PHY_READ_ERR,
+	DSA_LOOP_PHY_WRITE_OK,
+	DSA_LOOP_PHY_WRITE_ERR,
+	__DSA_LOOP_CNT_MAX,
+};
+
+static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
+	[DSA_LOOP_PHY_READ_OK]	= { "phy_read_ok", },
+	[DSA_LOOP_PHY_READ_ERR]	= { "phy_read_err", },
+	[DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
+	[DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
+};
+
+struct dsa_loop_port {
+	struct dsa_loop_mib_entry mib[__DSA_LOOP_CNT_MAX];
+};
+
 #define DSA_LOOP_VLANS	5
 
 struct dsa_loop_priv {
 	struct mii_bus	*bus;
 	unsigned int	port_base;
 	struct dsa_loop_vlan vlans[DSA_LOOP_VLANS];
 	struct net_device *netdev;
+	struct dsa_loop_port ports[DSA_MAX_PORTS];
 	u16 pvid;
 };
 
@@ -47,11 +73,43 @@ static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds)
 
 static int dsa_loop_setup(struct dsa_switch *ds)
 {
+	struct dsa_loop_priv *ps = ds->priv;
+	unsigned int i;
+
+	for (i = 0; i < ds->num_ports; i++)
+		memcpy(ps->ports[i].mib, dsa_loop_mibs,
+		       sizeof(dsa_loop_mibs));
+
 	dev_dbg(ds->dev, "%s\n", __func__);
 
 	return 0;
 }
 
+static int dsa_loop_get_sset_count(struct dsa_switch *ds)
+{
+	return __DSA_LOOP_CNT_MAX;
+}
+
+static void dsa_loop_get_strings(struct dsa_switch *ds, int port, uint8_t *data)
+{
+	struct dsa_loop_priv *ps = ds->priv;
+	unsigned int i;
+
+	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
+		memcpy(data + i * ETH_GSTRING_LEN,
+		       ps->ports[port].mib[i].name, ETH_GSTRING_LEN);
+}
+
+static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
+				       uint64_t *data)
+{
+	struct dsa_loop_priv *ps = ds->priv;
+	unsigned int i;
+
+	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
+		data[i] = ps->ports[port].mib[i].val;
+}
+
 static int dsa_loop_set_addr(struct dsa_switch *ds, u8 *addr)
 {
 	dev_dbg(ds->dev, "%s\n", __func__);
@@ -63,21 +121,35 @@ static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)
 {
 	struct dsa_loop_priv *ps = ds->priv;
 	struct mii_bus *bus = ps->bus;
+	int ret;
 
 	dev_dbg(ds->dev, "%s\n", __func__);
 
-	return mdiobus_read_nested(bus, ps->port_base + port, regnum);
+	ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
+	if (ret < 0)
+		ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
+	else
+		ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;
+
+	return ret;
 }
 
 static int dsa_loop_phy_write(struct dsa_switch *ds, int port,
 			      int regnum, u16 value)
 {
 	struct dsa_loop_priv *ps = ds->priv;
 	struct mii_bus *bus = ps->bus;
+	int ret;
 
 	dev_dbg(ds->dev, "%s\n", __func__);
 
-	return mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
+	ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
+	if (ret < 0)
+		ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
+	else
+		ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;
+
+	return ret;
 }
 
 static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port,
@@ -225,6 +297,9 @@ static int dsa_loop_port_vlan_dump(struct dsa_switch *ds, int port,
 static struct dsa_switch_ops dsa_loop_driver = {
 	.get_tag_protocol	= dsa_loop_get_protocol,
 	.setup			= dsa_loop_setup,
+	.get_strings		= dsa_loop_get_strings,
+	.get_ethtool_stats	= dsa_loop_get_ethtool_stats,
+	.get_sset_count		= dsa_loop_get_sset_count,
 	.set_addr		= dsa_loop_set_addr,
 	.phy_read		= dsa_loop_phy_read,
 	.phy_write		= dsa_loop_phy_write,
@@ -293,15 +368,6 @@ static struct mdio_driver dsa_loop_drv = {
 
 #define NUM_FIXED_PHYS	(DSA_LOOP_NUM_PORTS - 2)
 
-static void unregister_fixed_phys(void)
-{
-	unsigned int i;
-
-	for (i = 0; i < NUM_FIXED_PHYS; i++)
-		if (phydevs[i])
-			fixed_phy_unregister(phydevs[i]);
-}
-
 static int __init dsa_loop_init(void)
 {
 	struct fixed_phy_status status = {
@@ -320,8 +386,12 @@ module_init(dsa_loop_init);
 
 static void __exit dsa_loop_exit(void)
 {
+	unsigned int i;
+
 	mdio_driver_unregister(&dsa_loop_drv);
-	unregister_fixed_phys();
+	for (i = 0; i < NUM_FIXED_PHYS; i++)
+		if (phydevs[i])
+			fixed_phy_unregister(phydevs[i]);
 }
 module_exit(dsa_loop_exit);