net: dsa: mv88e6xxx: Keep ATU/VTU violation statistics

Count the numbers of various ATU and VTU violation statistics and
return them as part of the ethtool -S statistics.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/chip.c

@@ -723,6 +723,24 @@ static int mv88e6320_stats_get_strings(struct mv88e6xxx_chip *chip,
 					   STATS_TYPE_BANK0 | STATS_TYPE_BANK1);
 }
 
+static const uint8_t *mv88e6xxx_atu_vtu_stats_strings[] = {
+	"atu_member_violation",
+	"atu_miss_violation",
+	"atu_full_violation",
+	"vtu_member_violation",
+	"vtu_miss_violation",
+};
+
+static void mv88e6xxx_atu_vtu_get_strings(uint8_t *data)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(mv88e6xxx_atu_vtu_stats_strings); i++)
+		strlcpy(data + i * ETH_GSTRING_LEN,
+			mv88e6xxx_atu_vtu_stats_strings[i],
+			ETH_GSTRING_LEN);
+}
+
 static void mv88e6xxx_get_strings(struct dsa_switch *ds, int port,
 				  uint8_t *data)
 {
@@ -736,9 +754,12 @@ static void mv88e6xxx_get_strings(struct dsa_switch *ds, int port,
 
 	if (chip->info->ops->serdes_get_strings) {
 		data += count * ETH_GSTRING_LEN;
-		chip->info->ops->serdes_get_strings(chip, port, data);
+		count = chip->info->ops->serdes_get_strings(chip, port, data);
 	}
 
+	data += count * ETH_GSTRING_LEN;
+	mv88e6xxx_atu_vtu_get_strings(data);
+
 	mutex_unlock(&chip->reg_lock);
 }
 
@@ -783,10 +804,13 @@ static int mv88e6xxx_get_sset_count(struct dsa_switch *ds, int port)
 	if (chip->info->ops->serdes_get_sset_count)
 		serdes_count = chip->info->ops->serdes_get_sset_count(chip,
 								      port);
-	if (serdes_count < 0)
+	if (serdes_count < 0) {
 		count = serdes_count;
-	else
-		count += serdes_count;
+		goto out;
+	}
+	count += serdes_count;
+	count += ARRAY_SIZE(mv88e6xxx_atu_vtu_stats_strings);
+
 out:
 	mutex_unlock(&chip->reg_lock);
 
@@ -841,6 +865,16 @@ static int mv88e6390_stats_get_stats(struct mv88e6xxx_chip *chip, int port,
 					 0);
 }
 
+static void mv88e6xxx_atu_vtu_get_stats(struct mv88e6xxx_chip *chip, int port,
+					uint64_t *data)
+{
+	*data++ = chip->ports[port].atu_member_violation;
+	*data++ = chip->ports[port].atu_miss_violation;
+	*data++ = chip->ports[port].atu_full_violation;
+	*data++ = chip->ports[port].vtu_member_violation;
+	*data++ = chip->ports[port].vtu_miss_violation;
+}
+
 static void mv88e6xxx_get_stats(struct mv88e6xxx_chip *chip, int port,
 				uint64_t *data)
 {
@@ -849,12 +883,14 @@ static void mv88e6xxx_get_stats(struct mv88e6xxx_chip *chip, int port,
 	if (chip->info->ops->stats_get_stats)
 		count = chip->info->ops->stats_get_stats(chip, port, data);
 
+	mutex_lock(&chip->reg_lock);
 	if (chip->info->ops->serdes_get_stats) {
 		data += count;
-		mutex_lock(&chip->reg_lock);
-		chip->info->ops->serdes_get_stats(chip, port, data);
-		mutex_unlock(&chip->reg_lock);
+		count = chip->info->ops->serdes_get_stats(chip, port, data);
 	}
+	data += count;
+	mv88e6xxx_atu_vtu_get_stats(chip, port, data);
+	mutex_unlock(&chip->reg_lock);
 }
 
 static void mv88e6xxx_get_ethtool_stats(struct dsa_switch *ds, int port,

drivers/net/dsa/mv88e6xxx/chip.h

@@ -194,6 +194,11 @@ struct mv88e6xxx_port_hwtstamp {
 
 struct mv88e6xxx_port {
 	u64 serdes_stats[2];
+	u64 atu_member_violation;
+	u64 atu_miss_violation;
+	u64 atu_full_violation;
+	u64 vtu_member_violation;
+	u64 vtu_miss_violation;
 };
 
 struct mv88e6xxx_chip {
@@ -409,10 +414,10 @@ struct mv88e6xxx_ops {
 
 	/* Statistics from the SERDES interface */
 	int (*serdes_get_sset_count)(struct mv88e6xxx_chip *chip, int port);
-	void (*serdes_get_strings)(struct mv88e6xxx_chip *chip,  int port,
-				   uint8_t *data);
-	void (*serdes_get_stats)(struct mv88e6xxx_chip *chip,  int port,
-				 uint64_t *data);
+	int (*serdes_get_strings)(struct mv88e6xxx_chip *chip,  int port,
+				  uint8_t *data);
+	int (*serdes_get_stats)(struct mv88e6xxx_chip *chip,  int port,
+				uint64_t *data);
 
 	/* VLAN Translation Unit operations */
 	int (*vtu_getnext)(struct mv88e6xxx_chip *chip,

drivers/net/dsa/mv88e6xxx/global1_atu.c

@@ -336,8 +336,6 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
 	if (err)
 		goto out;
 
-	mutex_unlock(&chip->reg_lock);
-
 	if (val & MV88E6XXX_G1_ATU_OP_AGE_OUT_VIOLATION) {
 		dev_err_ratelimited(chip->dev,
 				    "ATU age out violation for %pM\n",
@@ -348,17 +346,23 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
 		dev_err_ratelimited(chip->dev,
 				    "ATU member violation for %pM portvec %x\n",
 				    entry.mac, entry.portvec);
+		chip->ports[entry.portvec].atu_member_violation++;
 	}
 
-	if (val & MV88E6XXX_G1_ATU_OP_MEMBER_VIOLATION)
+	if (val & MV88E6XXX_G1_ATU_OP_MEMBER_VIOLATION) {
 		dev_err_ratelimited(chip->dev,
 				    "ATU miss violation for %pM portvec %x\n",
 				    entry.mac, entry.portvec);
+		chip->ports[entry.portvec].atu_miss_violation++;
+	}
 
-	if (val & MV88E6XXX_G1_ATU_OP_FULL_VIOLATION)
+	if (val & MV88E6XXX_G1_ATU_OP_FULL_VIOLATION) {
 		dev_err_ratelimited(chip->dev,
 				    "ATU full violation for %pM portvec %x\n",
 				    entry.mac, entry.portvec);
+		chip->ports[entry.portvec].atu_full_violation++;
+	}
+	mutex_unlock(&chip->reg_lock);
 
 	return IRQ_HANDLED;
 

drivers/net/dsa/mv88e6xxx/global1_vtu.c

@@ -539,18 +539,20 @@ static irqreturn_t mv88e6xxx_g1_vtu_prob_irq_thread_fn(int irq, void *dev_id)
 	if (err)
 		goto out;
 
-	mutex_unlock(&chip->reg_lock);
-
 	spid = val & MV88E6XXX_G1_VTU_OP_SPID_MASK;
 
 	if (val & MV88E6XXX_G1_VTU_OP_MEMBER_VIOLATION) {
 		dev_err_ratelimited(chip->dev, "VTU member violation for vid %d, source port %d\n",
 				    entry.vid, spid);
+		chip->ports[spid].vtu_member_violation++;
 	}
 
-	if (val & MV88E6XXX_G1_VTU_OP_MISS_VIOLATION)
+	if (val & MV88E6XXX_G1_VTU_OP_MISS_VIOLATION) {
 		dev_err_ratelimited(chip->dev, "VTU miss violation for vid %d, source port %d\n",
 				    entry.vid, spid);
+		chip->ports[spid].vtu_miss_violation++;
+	}
+	mutex_unlock(&chip->reg_lock);
 
 	return IRQ_HANDLED;
 

drivers/net/dsa/mv88e6xxx/serdes.c

@@ -106,20 +106,21 @@ int mv88e6352_serdes_get_sset_count(struct mv88e6xxx_chip *chip, int port)
 	return 0;
 }
 
-void mv88e6352_serdes_get_strings(struct mv88e6xxx_chip *chip,
-				  int port, uint8_t *data)
+int mv88e6352_serdes_get_strings(struct mv88e6xxx_chip *chip,
+				 int port, uint8_t *data)
 {
 	struct mv88e6352_serdes_hw_stat *stat;
 	int i;
 
 	if (!mv88e6352_port_has_serdes(chip, port))
-		return;
+		return 0;
 
 	for (i = 0; i < ARRAY_SIZE(mv88e6352_serdes_hw_stats); i++) {
 		stat = &mv88e6352_serdes_hw_stats[i];
 		memcpy(data + i * ETH_GSTRING_LEN, stat->string,
 		       ETH_GSTRING_LEN);
 	}
+	return ARRAY_SIZE(mv88e6352_serdes_hw_stats);
 }
 
 static uint64_t mv88e6352_serdes_get_stat(struct mv88e6xxx_chip *chip,
@@ -149,8 +150,8 @@ static uint64_t mv88e6352_serdes_get_stat(struct mv88e6xxx_chip *chip,
 	return val;
 }
 
-void mv88e6352_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
-				uint64_t *data)
+int mv88e6352_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
+			       uint64_t *data)
 {
 	struct mv88e6xxx_port *mv88e6xxx_port = &chip->ports[port];
 	struct mv88e6352_serdes_hw_stat *stat;
@@ -158,7 +159,7 @@ void mv88e6352_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
 	int i;
 
 	if (!mv88e6352_port_has_serdes(chip, port))
-		return;
+		return 0;
 
 	BUILD_BUG_ON(ARRAY_SIZE(mv88e6352_serdes_hw_stats) >
 		     ARRAY_SIZE(mv88e6xxx_port->serdes_stats));
@@ -169,6 +170,8 @@ void mv88e6352_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
 		mv88e6xxx_port->serdes_stats[i] += value;
 		data[i] = mv88e6xxx_port->serdes_stats[i];
 	}
+
+	return ARRAY_SIZE(mv88e6352_serdes_hw_stats);
 }
 
 /* Set the power on/off for 10GBASE-R and 10GBASE-X4/X2 */

drivers/net/dsa/mv88e6xxx/serdes.h

@@ -45,8 +45,8 @@
 int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
 int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
 int mv88e6352_serdes_get_sset_count(struct mv88e6xxx_chip *chip, int port);
-void mv88e6352_serdes_get_strings(struct mv88e6xxx_chip *chip,
-				  int port, uint8_t *data);
-void mv88e6352_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
-				uint64_t *data);
+int mv88e6352_serdes_get_strings(struct mv88e6xxx_chip *chip,
+				 int port, uint8_t *data);
+int mv88e6352_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
+			       uint64_t *data);
 #endif