net: dsa: microchip: move get_phy_flags & mtu to ksz_common

This patch assigns the get_phy_flags & mtu  hook of ksz8795 and ksz9477
in dsa_switch_ops to ksz_common.  For get_phy_flags hooks,checks whether
the chip is ksz8863/kss8793 then it returns error for port1.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/dsa/microchip/ksz8795.c

@@ -898,18 +898,6 @@ static void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
 	}
 }
 
-static u32 ksz8_sw_get_phy_flags(struct dsa_switch *ds, int port)
-{
-	/* Silicon Errata Sheet (DS80000830A):
-	 * Port 1 does not work with LinkMD Cable-Testing.
-	 * Port 1 does not respond to received PAUSE control frames.
-	 */
-	if (!port)
-		return MICREL_KSZ8_P1_ERRATA;
-
-	return 0;
-}
-
 static void ksz8_cfg_port_member(struct ksz_device *dev, int port, u8 member)
 {
 	u8 data;
@@ -1470,7 +1458,7 @@ static void ksz8_get_caps(struct ksz_device *dev, int port,
 
 static const struct dsa_switch_ops ksz8_switch_ops = {
 	.get_tag_protocol	= ksz_get_tag_protocol,
-	.get_phy_flags		= ksz8_sw_get_phy_flags,
+	.get_phy_flags		= ksz_get_phy_flags,
 	.setup			= ksz8_setup,
 	.phy_read		= ksz_phy_read16,
 	.phy_write		= ksz_phy_write16,

drivers/net/dsa/microchip/ksz9477.c

@@ -47,9 +47,8 @@ static void ksz9477_port_cfg32(struct ksz_device *dev, int port, int offset,
 			   bits, set ? bits : 0);
 }
 
-static int ksz9477_change_mtu(struct dsa_switch *ds, int port, int mtu)
+static int ksz9477_change_mtu(struct ksz_device *dev, int port, int mtu)
 {
-	struct ksz_device *dev = ds->priv;
 	u16 frame_size, max_frame = 0;
 	int i;
 
@@ -65,7 +64,7 @@ static int ksz9477_change_mtu(struct dsa_switch *ds, int port, int mtu)
 				  REG_SW_MTU_MASK, max_frame);
 }
 
-static int ksz9477_max_mtu(struct dsa_switch *ds, int port)
+static int ksz9477_max_mtu(struct ksz_device *dev, int port)
 {
 	return KSZ9477_MAX_FRAME_SIZE - VLAN_ETH_HLEN - ETH_FCS_LEN;
 }
@@ -1315,8 +1314,8 @@ static const struct dsa_switch_ops ksz9477_switch_ops = {
 	.port_mirror_add	= ksz_port_mirror_add,
 	.port_mirror_del	= ksz_port_mirror_del,
 	.get_stats64		= ksz_get_stats64,
-	.port_change_mtu	= ksz9477_change_mtu,
-	.port_max_mtu		= ksz9477_max_mtu,
+	.port_change_mtu	= ksz_change_mtu,
+	.port_max_mtu		= ksz_max_mtu,
 };
 
 static u32 ksz9477_get_port_addr(int port, int offset)
@@ -1399,6 +1398,8 @@ static const struct ksz_dev_ops ksz9477_dev_ops = {
 	.fdb_del = ksz9477_fdb_del,
 	.mdb_add = ksz9477_mdb_add,
 	.mdb_del = ksz9477_mdb_del,
+	.change_mtu = ksz9477_change_mtu,
+	.max_mtu = ksz9477_max_mtu,
 	.shutdown = ksz9477_reset_switch,
 	.init = ksz9477_switch_init,
 	.exit = ksz9477_switch_exit,

drivers/net/dsa/microchip/ksz_common.c

@@ -16,6 +16,7 @@
 #include <linux/if_bridge.h>
 #include <linux/of_device.h>
 #include <linux/of_net.h>
+#include <linux/micrel_phy.h>
 #include <net/dsa.h>
 #include <net/switchdev.h>
 
@@ -705,6 +706,23 @@ int ksz_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val)
 }
 EXPORT_SYMBOL_GPL(ksz_phy_write16);
 
+u32 ksz_get_phy_flags(struct dsa_switch *ds, int port)
+{
+	struct ksz_device *dev = ds->priv;
+
+	if (dev->chip_id == KSZ8830_CHIP_ID) {
+		/* Silicon Errata Sheet (DS80000830A):
+		 * Port 1 does not work with LinkMD Cable-Testing.
+		 * Port 1 does not respond to received PAUSE control frames.
+		 */
+		if (!port)
+			return MICREL_KSZ8_P1_ERRATA;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ksz_get_phy_flags);
+
 void ksz_mac_link_down(struct dsa_switch *ds, int port, unsigned int mode,
 		       phy_interface_t interface)
 {
@@ -984,6 +1002,28 @@ void ksz_port_mirror_del(struct dsa_switch *ds, int port,
 }
 EXPORT_SYMBOL_GPL(ksz_port_mirror_del);
 
+int ksz_change_mtu(struct dsa_switch *ds, int port, int mtu)
+{
+	struct ksz_device *dev = ds->priv;
+
+	if (!dev->dev_ops->change_mtu)
+		return -EOPNOTSUPP;
+
+	return dev->dev_ops->change_mtu(dev, port, mtu);
+}
+EXPORT_SYMBOL_GPL(ksz_change_mtu);
+
+int ksz_max_mtu(struct dsa_switch *ds, int port)
+{
+	struct ksz_device *dev = ds->priv;
+
+	if (!dev->dev_ops->max_mtu)
+		return -EOPNOTSUPP;
+
+	return dev->dev_ops->max_mtu(dev, port);
+}
+EXPORT_SYMBOL_GPL(ksz_max_mtu);
+
 static int ksz_switch_detect(struct ksz_device *dev)
 {
 	u8 id1, id2;

drivers/net/dsa/microchip/ksz_common.h

@@ -200,6 +200,8 @@ struct ksz_dev_ops {
 		       struct dsa_db db);
 	void (*get_caps)(struct ksz_device *dev, int port,
 			 struct phylink_config *config);
+	int (*change_mtu)(struct ksz_device *dev, int port, int mtu);
+	int (*max_mtu)(struct ksz_device *dev, int port);
 	void (*freeze_mib)(struct ksz_device *dev, int port, bool freeze);
 	void (*port_init_cnt)(struct ksz_device *dev, int port);
 	int (*shutdown)(struct ksz_device *dev);
@@ -227,6 +229,7 @@ extern const struct ksz_chip_data ksz_switch_chips[];
 
 int ksz_phy_read16(struct dsa_switch *ds, int addr, int reg);
 int ksz_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val);
+u32 ksz_get_phy_flags(struct dsa_switch *ds, int port);
 void ksz_mac_link_down(struct dsa_switch *ds, int port, unsigned int mode,
 		       phy_interface_t interface);
 int ksz_sset_count(struct dsa_switch *ds, int port, int sset);
@@ -267,6 +270,8 @@ int ksz_port_mirror_add(struct dsa_switch *ds, int port,
 			bool ingress, struct netlink_ext_ack *extack);
 void ksz_port_mirror_del(struct dsa_switch *ds, int port,
 			 struct dsa_mall_mirror_tc_entry *mirror);
+int ksz_change_mtu(struct dsa_switch *ds, int port, int mtu);
+int ksz_max_mtu(struct dsa_switch *ds, int port);
 
 /* Common register access functions */