net: dsa: mv88e6xxx: introduce .serdes_irq_status

Introduce a new .serdes_irq_status operation to prepare the abstraction
of IRQ thread from the SERDES IRQ setup code.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/chip.c

@@ -2935,6 +2935,7 @@ static const struct mv88e6xxx_ops mv88e6141_ops = {
 	.serdes_get_lane = mv88e6341_serdes_get_lane,
 	.serdes_irq_mapping = mv88e6390_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6390_serdes_irq_enable,
+	.serdes_irq_status = mv88e6390_serdes_irq_status,
 	.serdes_irq_setup = mv88e6390_serdes_irq_setup,
 	.serdes_irq_free = mv88e6390_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,
@@ -3186,6 +3187,7 @@ static const struct mv88e6xxx_ops mv88e6176_ops = {
 	.serdes_power = mv88e6352_serdes_power,
 	.serdes_irq_mapping = mv88e6352_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6352_serdes_irq_enable,
+	.serdes_irq_status = mv88e6352_serdes_irq_status,
 	.serdes_irq_setup = mv88e6352_serdes_irq_setup,
 	.serdes_irq_free = mv88e6352_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,
@@ -3271,6 +3273,7 @@ static const struct mv88e6xxx_ops mv88e6190_ops = {
 	.serdes_get_lane = mv88e6390_serdes_get_lane,
 	.serdes_irq_mapping = mv88e6390_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6390_serdes_irq_enable,
+	.serdes_irq_status = mv88e6390_serdes_irq_status,
 	.serdes_irq_setup = mv88e6390_serdes_irq_setup,
 	.serdes_irq_free = mv88e6390_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,
@@ -3320,6 +3323,7 @@ static const struct mv88e6xxx_ops mv88e6190x_ops = {
 	.serdes_get_lane = mv88e6390x_serdes_get_lane,
 	.serdes_irq_mapping = mv88e6390_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6390_serdes_irq_enable,
+	.serdes_irq_status = mv88e6390_serdes_irq_status,
 	.serdes_irq_setup = mv88e6390_serdes_irq_setup,
 	.serdes_irq_free = mv88e6390_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,
@@ -3369,6 +3373,7 @@ static const struct mv88e6xxx_ops mv88e6191_ops = {
 	.serdes_get_lane = mv88e6390_serdes_get_lane,
 	.serdes_irq_mapping = mv88e6390_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6390_serdes_irq_enable,
+	.serdes_irq_status = mv88e6390_serdes_irq_status,
 	.serdes_irq_setup = mv88e6390_serdes_irq_setup,
 	.serdes_irq_free = mv88e6390_serdes_irq_free,
 	.avb_ops = &mv88e6390_avb_ops,
@@ -3420,6 +3425,7 @@ static const struct mv88e6xxx_ops mv88e6240_ops = {
 	.serdes_power = mv88e6352_serdes_power,
 	.serdes_irq_mapping = mv88e6352_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6352_serdes_irq_enable,
+	.serdes_irq_status = mv88e6352_serdes_irq_status,
 	.serdes_irq_setup = mv88e6352_serdes_irq_setup,
 	.serdes_irq_free = mv88e6352_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,
@@ -3511,6 +3517,7 @@ static const struct mv88e6xxx_ops mv88e6290_ops = {
 	.serdes_get_lane = mv88e6390_serdes_get_lane,
 	.serdes_irq_mapping = mv88e6390_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6390_serdes_irq_enable,
+	.serdes_irq_status = mv88e6390_serdes_irq_status,
 	.serdes_irq_setup = mv88e6390_serdes_irq_setup,
 	.serdes_irq_free = mv88e6390_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,
@@ -3650,6 +3657,7 @@ static const struct mv88e6xxx_ops mv88e6341_ops = {
 	.serdes_get_lane = mv88e6341_serdes_get_lane,
 	.serdes_irq_mapping = mv88e6390_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6390_serdes_irq_enable,
+	.serdes_irq_status = mv88e6390_serdes_irq_status,
 	.serdes_irq_setup = mv88e6390_serdes_irq_setup,
 	.serdes_irq_free = mv88e6390_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,
@@ -3784,6 +3792,7 @@ static const struct mv88e6xxx_ops mv88e6352_ops = {
 	.serdes_power = mv88e6352_serdes_power,
 	.serdes_irq_mapping = mv88e6352_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6352_serdes_irq_enable,
+	.serdes_irq_status = mv88e6352_serdes_irq_status,
 	.serdes_irq_setup = mv88e6352_serdes_irq_setup,
 	.serdes_irq_free = mv88e6352_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,
@@ -3840,6 +3849,7 @@ static const struct mv88e6xxx_ops mv88e6390_ops = {
 	.serdes_get_lane = mv88e6390_serdes_get_lane,
 	.serdes_irq_mapping = mv88e6390_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6390_serdes_irq_enable,
+	.serdes_irq_status = mv88e6390_serdes_irq_status,
 	.serdes_irq_setup = mv88e6390_serdes_irq_setup,
 	.serdes_irq_free = mv88e6390_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,
@@ -3893,6 +3903,7 @@ static const struct mv88e6xxx_ops mv88e6390x_ops = {
 	.serdes_get_lane = mv88e6390x_serdes_get_lane,
 	.serdes_irq_mapping = mv88e6390_serdes_irq_mapping,
 	.serdes_irq_enable = mv88e6390_serdes_irq_enable,
+	.serdes_irq_status = mv88e6390_serdes_irq_status,
 	.serdes_irq_setup = mv88e6390_serdes_irq_setup,
 	.serdes_irq_free = mv88e6390_serdes_irq_free,
 	.gpio_ops = &mv88e6352_gpio_ops,

drivers/net/dsa/mv88e6xxx/chip.h

@@ -454,6 +454,8 @@ struct mv88e6xxx_ops {
 	void (*serdes_irq_free)(struct mv88e6xxx_chip *chip, int port);
 	int (*serdes_irq_enable)(struct mv88e6xxx_chip *chip, int port, u8 lane,
 				 bool enable);
+	irqreturn_t (*serdes_irq_status)(struct mv88e6xxx_chip *chip, int port,
+					 u8 lane);
 
 	/* Statistics from the SERDES interface */
 	int (*serdes_get_sset_count)(struct mv88e6xxx_chip *chip, int port);

drivers/net/dsa/mv88e6xxx/serdes.c

@@ -202,25 +202,33 @@ static void mv88e6352_serdes_irq_link(struct mv88e6xxx_chip *chip, int port)
 	dsa_port_phylink_mac_change(ds, port, up);
 }
 
+irqreturn_t mv88e6352_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
+					u8 lane)
+{
+	irqreturn_t ret = IRQ_NONE;
+	u16 status;
+	int err;
+
+	err = mv88e6352_serdes_read(chip, MV88E6352_SERDES_INT_STATUS, &status);
+	if (err)
+		return ret;
+
+	if (status & MV88E6352_SERDES_INT_LINK_CHANGE) {
+		ret = IRQ_HANDLED;
+		mv88e6352_serdes_irq_link(chip, port);
+	}
+
+	return ret;
+}
+
 static irqreturn_t mv88e6352_serdes_thread_fn(int irq, void *dev_id)
 {
 	struct mv88e6xxx_port *port = dev_id;
 	struct mv88e6xxx_chip *chip = port->chip;
 	irqreturn_t ret = IRQ_NONE;
-	u16 status;
-	int err;
 
 	mv88e6xxx_reg_lock(chip);
-
+	ret = mv88e6xxx_serdes_irq_status(chip, port->port, 0);
-	err = mv88e6352_serdes_read(chip, MV88E6352_SERDES_INT_STATUS, &status);
-	if (err)
-		goto out;
-
-	if (status & MV88E6352_SERDES_INT_LINK_CHANGE) {
-		ret = IRQ_HANDLED;
-		mv88e6352_serdes_irq_link(chip, port->port);
-	}
-out:
 	mv88e6xxx_reg_unlock(chip);
 
 	return ret;
@@ -589,21 +597,13 @@ static int mv88e6390_serdes_irq_status_sgmii(struct mv88e6xxx_chip *chip,
 	return err;
 }
 
-static irqreturn_t mv88e6390_serdes_thread_fn(int irq, void *dev_id)
+irqreturn_t mv88e6390_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
+					u8 lane)
 {
-	struct mv88e6xxx_port *port = dev_id;
+	u8 cmode = chip->ports[port].cmode;
-	struct mv88e6xxx_chip *chip = port->chip;
 	irqreturn_t ret = IRQ_NONE;
-	u8 cmode = port->cmode;
 	u16 status;
 	int err;
-	u8 lane;
-
-	mv88e6xxx_reg_lock(chip);
-
-	lane = mv88e6xxx_serdes_get_lane(chip, port->port);
-	if (!lane)
-		goto out;
 
 	switch (cmode) {
 	case MV88E6XXX_PORT_STS_CMODE_SGMII:
@@ -611,13 +611,30 @@ static irqreturn_t mv88e6390_serdes_thread_fn(int irq, void *dev_id)
 	case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
 		err = mv88e6390_serdes_irq_status_sgmii(chip, lane, &status);
 		if (err)
-			goto out;
+			return ret;
 		if (status & (MV88E6390_SGMII_INT_LINK_DOWN |
 			      MV88E6390_SGMII_INT_LINK_UP)) {
 			ret = IRQ_HANDLED;
-			mv88e6390_serdes_irq_link_sgmii(chip, port->port, lane);
+			mv88e6390_serdes_irq_link_sgmii(chip, port, lane);
 		}
 	}
+
+	return ret;
+}
+
+static irqreturn_t mv88e6390_serdes_thread_fn(int irq, void *dev_id)
+{
+	struct mv88e6xxx_port *port = dev_id;
+	struct mv88e6xxx_chip *chip = port->chip;
+	irqreturn_t ret = IRQ_NONE;
+	u8 lane;
+
+	mv88e6xxx_reg_lock(chip);
+	lane = mv88e6xxx_serdes_get_lane(chip, port->port);
+	if (!lane)
+		goto out;
+
+	ret = mv88e6xxx_serdes_irq_status(chip, port->port, lane);
 out:
 	mv88e6xxx_reg_unlock(chip);
 

drivers/net/dsa/mv88e6xxx/serdes.h

@@ -92,6 +92,10 @@ int mv88e6352_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, u8 lane,
 				bool enable);
 int mv88e6390_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, u8 lane,
 				bool enable);
+irqreturn_t mv88e6352_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
+					u8 lane);
+irqreturn_t mv88e6390_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
+					u8 lane);
 int mv88e6352_serdes_get_sset_count(struct mv88e6xxx_chip *chip, int port);
 int mv88e6352_serdes_get_strings(struct mv88e6xxx_chip *chip,
 				 int port, uint8_t *data);
@@ -155,4 +159,13 @@ static inline int mv88e6xxx_serdes_irq_disable(struct mv88e6xxx_chip *chip,
 	return chip->info->ops->serdes_irq_enable(chip, port, lane, false);
 }
 
+static inline irqreturn_t
+mv88e6xxx_serdes_irq_status(struct mv88e6xxx_chip *chip, int port, u8 lane)
+{
+	if (!chip->info->ops->serdes_irq_status)
+		return IRQ_NONE;
+
+	return chip->info->ops->serdes_irq_status(chip, port, lane);
+}
+
 #endif